Steam trap

Abstract

To provide a steam trap capable of accommodating fluctuations in an amount of condensate water generated.SOLUTION: A steam trap comprises: a body (2) which has a flow passage (8) of condensate water therein; and a plurality of detachable sections (3, 4, and 5) which can be attached to and removed from the body. The flow passage has a plurality of specific spaces (11, 12, and 13). Each specific space includes a first space (11a, 12a, or 13a) with one end thereof open to an outside and a second space (11b, 12b or 13b) which is formed opposite an opening of the first space (11c, 12c, or 13c) and is connected to the first space through the opening. Each second space is configured to detachably hold a nozzle. The openings of the first spaces are sealed by the detachable sections.SELECTED DRAWING: Figure 19

Description

[Technical Field]

[0001] The present invention relates to a steam trap. [Background technology]

[0002] Steam is used industrially as a heat source to heat objects. When used as a heat source, the steam liquefies and becomes condensed water. The condensed water reduces the heating effect of the steam and can also cause so-called water hammer. Therefore, in factories and the like, it is necessary to install steam traps in the piping of production lines and properly discharge the condensed water. For example, Patent Document 1 discloses technology related to steam traps. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-196807 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the amount of condensed water generated varies depending on the environment, so there was a need to develop a steam trap that could accommodate these fluctuations.

[0005] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a steam trap that can respond to fluctuations in the amount of condensed water generated. [Means for solving the problem]

[0006] As a solution to achieve the above objectives, The steam trap of the present invention comprises: The device comprises a main body having a condensed water flow path therein, and a plurality of detachable parts that are detachable from the main body, A plurality of specific spaces are formed in the flow path, Each of the plurality of specific spaces includes a first space having one side open to the outside, and a second space formed at a position opposite to the opening of the first space and connected to the opening of the first space via the first space, Each of the second spaces is configured to removably hold a nozzle, The openings of the first spaces are sealed by the detachable portions. It is characterized by:

[0007] In addition, in the above configuration, The second space includes a nozzle holder that holds the nozzle such that the nozzle axis extends in a first direction, and a nozzle holder that holds the nozzle such that the nozzle axis extends in a second direction different from the first direction. It is characterized by:

[0008] In addition, in the above configuration, an opposing wall facing the opening of the first space is formed between the first space and the second space; The opposing wall restricts movement of the strainer, which is detachably attached inside the main body, in an attachment direction relative to the main body, The detachable portion restricts movement of the strainer in a direction opposite to a direction in which the strainer is attached to the main body. It is characterized by:

[0009] In addition, in the above configuration, The plurality of detachable parts include one including an inlet for taking in condensed water present in the first space, a discharge port for discharging the condensed water taken in from the inlet to the outside of the main body, a discharge path for discharging the condensed water from the inlet to the discharge port, a valve provided in the discharge path for regulating the discharge of condensed water from the inlet to the discharge port, and an operating part for opening and closing the valve. It is characterized by:

[0010] In addition, in the above configuration, the flow path extends from an inlet for introducing condensed water into the inside of the body to an outlet for discharging condensed water to the outside of the body; a discharge space having the discharge port is formed in the flow path, The discharge space has an opening on one side different from the discharge port, The plurality of detachable parts include a part that seals an opening of the discharge space and includes an inlet for taking in condensed water present in the discharge space, a discharge port for discharging the condensed water taken in from the inlet to the outside of the main body, a delivery path for sending the condensed water from the inlet to the discharge port, a valve that is provided in the delivery path and restricts the delivery of condensed water from the inlet to the discharge port, and an operating part that opens and closes the valve. It is characterized by:

[0011] As a solution to achieve the above objectives, The steam trap of the present invention comprises: The device comprises a main body having a condensed water flow path therein, and a plurality of detachable parts that are detachable from the main body, A plurality of specific spaces are formed in the flow path, Each of the plurality of specific spaces includes a first space having one side open to the outside, and a second space formed at a position opposite to the opening of the first space and connected to the opening of the first space via the first space, The openings of the first spaces are sealed by the detachable portions, the second space includes a structure for detachably holding a nozzle and a structure for detachably holding a plurality of plate materials in a thickness direction of the plurality of plate materials, the plurality of plate members are comprised of a first plate member having a first hole, a second plate member having a second hole, and a third plate member having a third hole, which is held in the second space so as to be adjacent to the first plate member and the second plate member, the first hole, the second hole, and the third hole all penetrate in the thickness direction, the diameter of the third hole is set larger than the diameters of the first hole and the second hole; When the plurality of plate materials are held in the second space, the first hole and the third hole overlap in the thickness direction, and the third hole and the second hole overlap in the thickness direction, while the first hole and the second hole do not overlap in the thickness direction. It is characterized by:

[0012] As a solution to achieve the above objectives, The steam trap of the present invention comprises: The device comprises a main body having a condensed water flow path therein, and a detachable part that is detachable from the main body, A specific space is formed in the flow path, the specific space includes a first space having one side open to the outside, and a second space formed at a position opposite to the opening of the first space and connected to the opening of the first space via the first space, the second space is configured to removably hold a nozzle; The opening of the first space is sealed by the detachable part. It is characterized by: [Effects of the Invention]

[0013] The present invention can provide a steam trap that can accommodate fluctuations in the amount of condensed water generated. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is a diagram schematically illustrating a steam strap according to the first embodiment. [Figure 2] FIG. 2 is a diagram schematically illustrating a steam strap according to the first embodiment. [Figure 3] FIG. 2 is a diagram schematically illustrating a steam strap according to the first embodiment. [Figure 4] FIG. 2 is a diagram showing a schematic view of a main body of the first embodiment. [Figure 5] 5 is a cross-sectional view of the main body taken along line AA in FIG. 4. [Figure 6] FIG. 2 is a diagram for explaining a flow path in the first embodiment. [Figure 7] FIG. 2 is a diagram schematically illustrating a first space of the first embodiment. [Figure 8] FIG. 2 is a diagram schematically illustrating a first space of the first embodiment. [Figure 9] FIG. 2 is a diagram schematically illustrating a first space of the first embodiment. [Figure 10] FIG. 2 is a diagram schematically illustrating a nozzle according to the first embodiment. [Figure 11] FIG. 1 is a diagram schematically illustrating a strainer according to a first embodiment. [Figure 12] FIG. 2 is a diagram showing a schematic view of a detachable portion of the first embodiment. [Figure 13] FIG. 2 is a diagram schematically illustrating a jig according to the first embodiment. [Figure 14] FIG. 3 is a diagram for explaining a method of attaching a nozzle according to the first embodiment. [Figure 15] FIG. 4 is a diagram showing a state in which a nozzle is attached to a second space in the first embodiment. [Figure 16] 3A and 3B are diagrams for explaining a method of attaching the strainer according to the first embodiment. [Figure 17] FIG. 2 is a diagram for explaining a state in which a nozzle and a strainer are attached to the main body of the first embodiment. [Figure 18] FIG. 2 is a diagram for explaining a state in which a nozzle and a strainer are attached to the main body of the first embodiment. [Figure 19] FIG. 2 is a diagram illustrating a state in which the steam strap according to the first embodiment is attached to a pipe. [Figure 20] 5A to 5C are diagrams for explaining a method for removing the nozzle according to the first embodiment. [Figure 21] FIG. 10 is a diagram for explaining a first space according to Modification 1 of the first embodiment. [Figure 22] FIG. 10 is a diagram schematically illustrating a detachable section according to a second modification of the first embodiment. [Figure 23] FIG. 10 is a diagram showing a schematic view of a state in which a detachable part according to a second modification of the first embodiment is attached to a main body. [Figure 24]10A and 10B are diagrams illustrating a detachable part according to a second modification of the first embodiment. [Figure 25] FIG. 10 is a diagram for explaining a steam trap according to a third modification of the first embodiment. [Figure 26] FIG. 10 is a diagram for explaining a main body according to a third modified example of the first embodiment. [Figure 27] 10 is a diagram illustrating a housing portion held in a second space of a steam strap according to a second embodiment. FIG. [Figure 28] FIG. 10 is a diagram schematically illustrating a storage section according to a second embodiment. [Figure 29] 10A and 10B are diagrams illustrating a group of plate materials accommodated in an accommodating section according to a second embodiment. [Figure 30] FIG. 10 is a diagram illustrating a group of plates placed in a second space of a steam strap according to a second embodiment. [Figure 31] FIG. 10 is a diagram schematically illustrating a state in which condensed water passes through a plate group according to a second embodiment. [Figure 32] FIG. 10 is a diagram illustrating a plate group according to a modified example of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this specification and the drawings, substantially identical components are designated by the same reference numerals to avoid redundant description. In each drawing, the Z direction indicates the vertical direction, and the X, Y, and Z directions are perpendicular to one another.

[0016] Fig. 1 is a schematic diagram of the steam trap 1 as seen from the front, Fig. 2 is a schematic diagram of the steam trap 1 as seen from the left side, and Fig. 3 is a schematic diagram of the steam trap 1 as seen from the right side.

[0017] The steam trap 1 is a nozzle-type steam trap. The steam trap 1 includes a main body 2 and a plurality of detachable parts 3 to 5. The steam trap 1 introduces condensed water into the main body 2 and discharges the introduced condensed water to the outside of the main body 2.

[0018] The main body 2 will be described with reference to Figures 4 to 6. Figure 4(a) is a schematic diagram of the main body 2 as seen from the front. Figure 4(b) is a schematic diagram of the main body 2 as seen from the left side. Figure 5 is a cross-sectional view of the main body 2 taken along line AA in Figure 4(b). Figure 6 is an explanatory diagram for explaining the flow path of condensed water.

[0019] The main body 2 is formed in a box shape and is made of a metal material. The main body 2 includes an inlet 6, an outlet 7, and a flow path 8.

[0020] The inlet 6 is for introducing condensed water into the main body 2. The outlet 7 is for discharging condensed water to the outside of the main body 2. The flow path 8 is a path through which the condensed water passes, and extends from the inlet 6 to the outlet 7. The flow path 8 has a plurality of specific spaces 11 to 13 and a discharge space 14 formed therein.

[0021] The specific space 11 is provided on the inlet 6 side. The specific space 13 is provided on the outlet 7 side. The specific space 12 is provided between the specific spaces 11 and 12.

[0022] The specific space 11 will be described with reference to Figures 5 and 7. Figure 7 is an enlarged view of the specific space 11 shown in Figure 5.

[0023] The specific space 11 includes a first space 11a and a second space 11b. The first space 11a is located on the X1 side of the inlet 6 and adjacent to the inlet 6. The second space 11b is located on the Z1 side of the first space 11a and adjacent to the first space 11a.

[0024] The first space 11a has an opening 11c on one side. The first space 11a communicates with the outside of the main body 2 via the opening 11c. The first space 11a is formed in the shape of a T laid on its side when viewed from the front (when viewed from the Y1 direction to the Y2 direction shown in FIG. 4). The first space 11a is composed of a space 11a1 extending in the X direction and a space 11a2 extending in the Z direction.

[0025] The space 11a1 is a cylindrical space. The space 11a1 is a space defined by a cylindrical wall 11a3. The space 11a1 has an inlet 6 that opens in the X2 direction. The space 11a1 extends linearly from the inlet 6 in the X1 direction and connects to the space 11a2.

[0026] The space 11a2 is a cylindrical space defined by a cylindrical wall 11a4 and a flat wall 11a5. The space 11a2 has an opening 11c.

[0027] The opening 11c is open in the Z2 direction and has a circular shape when viewed from the bottom (when viewed from the Z2 direction to the Z1 direction).

[0028] The cylindrical wall 11a4 has a screw groove 11a6 on its inner periphery. The screw groove 11a6 is provided near the opening 11c. The screw groove 11a6 is formed in a spiral shape along the inner periphery of the cylindrical wall 11a4. The screw groove 11a6 is threadedly engaged with a screw thread 3d of the first detachable part 3. The opening 11c is sealed by the first detachable part 3 as the screw groove 11a6 is threadedly engaged with the screw thread 3d (described in detail later). Note that detailed illustration of the screw groove 11a6 is omitted in FIG. 7.

[0029] The cylindrical wall 11a4 has a facing region 11a41 facing the inlet 6. The facing region 11a41 has the function of reducing the pressure of the condensed water introduced from the inlet 6 (described in detail later).

[0030] The flat wall 11a5 is formed between the first space 11a and the second space 11b. The flat wall 11a5 is an opposing wall facing the opening 11c. The surface of the flat wall 11a5 is formed perpendicular to the axial direction (Z direction) of the space 11a2. The flat wall 11a5 restricts movement of a strainer (described in detail later).

[0031] The second space 11b is formed on the flat wall 11a5 side and faces the opening 11c. The second space 11b is connected to the opening 11c via the first space 11a.

[0032] The second space 11b is a cylindrical space with both ends open. An opening 11b1 of the second space 11b connects to the first space 11a. An opening 11b2 of the second space 11b connects to the specific space 12 (first space 12a).

[0033] The second space 11b extends linearly in the Z direction from the opening 11b1 to the opening 11b2. The second space 11b is defined by a cylindrical wall 11b3. The cylindrical wall 11b3 and the flat wall 11a5 are continuous. The second space 11b and the space 11a2 are coaxially arranged.

[0034] The cylindrical wall 11b3 has a screw groove 11b4 on its inner periphery. The screw groove 11b4 is provided near the opening 11b1. The screw groove 11b4 is formed in a spiral shape along the inner periphery of the cylindrical wall 11b3. The screw groove 11b4 is engaged with a screw thread 21d of the first nozzle 21, which will be described later.

[0035] The second space 11b holds the first nozzle 21 by threading the screw groove 11b4 and the screw thread 21d together. An operator can use a jig 40 (described later) to attach and detach the first nozzle 21 to and from the second space 11b (described later in detail). Note that detailed illustration of the screw groove 11b4 is omitted in Figure 7.

[0036] The specific space 12 will be described with reference to Figures 5 and 8. Figure 8 is an enlarged view of the specific space 12 shown in Figure 5.

[0037] The specific space 12 includes a first space 12a and a second space 12b. The first space 12a is located on the Z1 side of the specific space 11 (second space 11b) and is adjacent to the second space 11b. The second space 12b is located on the X1 side of the first space 12a and is adjacent to the first space 12a.

[0038] The first space 12a is a cylindrical space. The first space 12a is a space defined by a cylindrical wall 12a1 and a right side wall 12a2. The first space 12a has an opening 12c on one side. The first space 12a communicates with the outside of the main body 2 through the opening 12c. The first space 12a extends linearly from the opening 12c in the X1 direction and connects to the second space 12b.

[0039] The opening 12c is open in the X2 direction and has a circular shape when viewed from the left side (viewed from the X2 direction to the X1 direction) (see FIG. 4(b)).

[0040] The cylindrical wall 12a1 has a screw groove 12a3 on its inner periphery. The screw groove 12a3 is provided near the opening 12c. The screw groove 12a3 is formed in a spiral shape along the inner periphery of the cylindrical wall 12a1. The screw groove 12a3 is threadedly engaged with the threads of the second detachable part 4. The opening 12c is sealed by the second detachable part 4 as the screw groove 12a3 is threadedly engaged with the threads of the second detachable part 4 (described in detail below). Note that detailed illustration of the screw groove 12a3 is omitted in FIG. 8.

[0041] The right side wall 12a2 is formed between the first space 12a and the second space 12b. The right side wall 12a2 is an opposing wall facing the opening 12c. The surface of the right side wall 12a2 is formed perpendicular to the axial direction (X direction) of the first space 12a. The right side wall 12a2 restricts movement of a strainer (described in detail later).

[0042] The cylindrical wall 12a1 has a facing region 12a11 facing the opening 11b2 of the second space 11b (specific space 11). This facing region 12a11 has the function of reducing the pressure of condensed water introduced from the second space 11b (described in detail later).

[0043] The second space 12b is formed on the right side wall 12a2 side of the first space 12a and faces the opening 12c. The second space 12b is connected to the opening 12c via the first space 12a.

[0044] The second space 12b is a cylindrical space with both ends open. An opening 12b1 of the second space 12b connects to the first space 12a. An opening 12b2 of the second space 12b connects to the specific space 13 (first space 13a).

[0045] The second space 12b extends linearly in the X direction from the opening 12b1 to the opening 12b2. The second space 12b is defined by a cylindrical wall 12b3. The cylindrical wall 12b3 and the right side wall 12a2 are continuous. The second space 12b and the first space 12a are coaxially arranged.

[0046] The cylindrical wall 12b3 has a screw groove 12b4 on its inner circumferential surface. The screw groove 12b4 is provided near the opening 12b1. The screw groove 12b4 is formed in a spiral shape along the inner periphery of the cylindrical wall 12b3. The screw groove 12b4 is to be threadedly engaged with the threads of the second nozzle 22, which will be described later.

[0047] The second space 12b holds the second nozzle 22 by threading the screw groove 12b4 into the threads of the second nozzle 22. An operator can use a jig 40 (described later) to attach and detach the second nozzle 22 to and from the second space 12b (details will be described later). Note that detailed illustration of the screw groove 12b4 is omitted in Figure 8.

[0048] The specific space 13 will be described with reference to Figures 5 and 9. Figure 9 is an enlarged view of the specific space 13 shown in Figure 5.

[0049] The specific space 13 includes a first space 13a and a second space 13b. The first space 13a is located on the X1 side of the specific space 12 (second space 12b) and is adjacent to the second space 12b. The second space 13b is located on the Z2 side of the first space 13a and is adjacent to the first space 13a.

[0050] The first space 13a is a cylindrical space. The first space 13a is a space defined by a cylindrical wall 13a1 and a bottom wall 13a2. The first space 13a has an opening 13c on one side. The first space 13a communicates with the outside of the main body 2 through the opening 13c. The first space 13a extends linearly from the opening 13c in the Z2 direction and connects to the second space 13b.

[0051] The opening 13c is open in the Z1 direction and has a circular shape in plan view (viewed from the Z1 direction to the Z2 direction).

[0052] The cylindrical wall 13a1 has a screw groove 13a3 on its inner periphery. The screw groove 13a3 is provided near the opening 13c. The screw groove 13a3 is formed in a spiral shape along the inner periphery of the cylindrical wall 13a1. The screw groove 13a3 is threadedly engaged with the threads of the third detachable part 5. The opening 13c is sealed by the third detachable part 5 as the screw groove 13a3 is threadedly engaged with the threads of the third detachable part 5 (described in detail below). Note that detailed illustration of the screw groove 13a3 is omitted in FIG. 9.

[0053] The bottom wall 13a2 is formed between the first space 13a and the second space 13b. The bottom wall 13a2 is an opposing wall facing the opening 13c. The surface of the bottom wall 13a2 is formed perpendicular to the axial direction (Z direction) of the first space 13a. The bottom wall 13a2 restricts movement of a strainer (described in detail later).

[0054] The cylindrical wall 13a1 has a facing region 13a11 facing the opening 12b2 of the second space 12b (specific space 12). This facing region 13a11 has the function of reducing the pressure of condensed water introduced from the second space 12b (described in detail later).

[0055] The second space 13b is formed on the bottom wall 13a2 side of the first space 13a and faces the opening 13c. The second space 13b is connected to the opening 13c via the first space 13a.

[0056] The second space 13b is a cylindrical space with both ends open. An opening 13b1 of the second space 13b is connected to the first space 13a. An opening 13b2 of the second space 13b is connected to the discharge space 14.

[0057] The second space 13b extends linearly in the Z direction from the opening 13b1 to the opening 13b2. The second space 13b is defined by a cylindrical wall 13b3. The cylindrical wall 13b3 and the bottom wall 13a2 are continuous. The second space 13b and the first space 13a are arranged coaxially.

[0058] The cylindrical wall 13b3 has a screw groove 13b4 on its inner circumferential surface. The screw groove 13b4 is provided near the opening 13b1 and is formed in a spiral shape along the inner periphery of the cylindrical wall 13b3. The screw groove 13b4 is to be threadedly engaged with a screw thread of the third nozzle 23, which will be described later.

[0059] The second space 13b holds the third nozzle 23 by threading the screw groove 13b4 into the threads of the third nozzle 23. An operator can use a jig 40 (described later) to attach and detach the third nozzle 23 to and from the second space 13b (details will be described later). Note that detailed illustration of the screw groove 13b4 is omitted in Figure 9.

[0060] The discharge space 14 is located on the Z2 side of the specific space 13 (second space 13b) and is adjacent to the second space 13b. The discharge space 14 has a discharge port 7. The discharge port 7 is open in the X1 direction.

[0061] The first nozzle 21 will be described using Figure 10. Figure 10(a) is a schematic diagram of the first nozzle 21 seen from the front. Figure 10(b) is a schematic diagram of the first nozzle 21 seen from above. Figure 10(c) is a cross-sectional view of the first nozzle 21 taken along line BB in Figure 10(b).

[0062] The first nozzle 21 includes a head 21a, a leg 21b, and a fine hole 21c.

[0063] The head 21a is formed in a hexagonal shape in a plan view. The leg 21b is formed in a cylindrical shape and has a screw thread 21d. The screw thread 21d is formed in a spiral shape along the outer periphery of the leg 21b. The screw thread 21d is threadedly engaged with the screw groove 11b4 of the second space 11b described above. The first nozzle 21 is attached to the second space 11b (specific space 11) by the screw thread 21d being threadedly engaged with the screw groove 11b4. Note that detailed illustration of the screw thread 21d is omitted in FIG. 10.

[0064] The pore 21c is a through-hole that is open at both ends. The pore 21c extends linearly along the axial direction of the leg portion 21b from the center of the upper surface of the head portion 21a to the tip of the leg portion 21b. The pore 21c has a diameter of 0.75 mm. Condensed water moves from the first space 11a to the first space 12a through the pore 21c (described in detail below).

[0065] The second nozzle 22 has the same configuration as the first nozzle 21, so its illustration and detailed description are omitted, but the second nozzle 22 has a head that is hexagonal in plan view, a cylindrical leg with a screw thread on its outer periphery, and a 0.75 mm diameter hole that extends linearly along the axial direction of the leg from the center of the top surface of the head to the tip of the leg, and the screw thread screws into the screw groove 12b4 of the second space 12b.By this screw engagement, the second nozzle 22 is attached to the second space 12b (specific space 12), and condensed water introduced into the inside of the main body 2 moves from the first space 12a to the first space 13a through the hole of the second nozzle 22.

[0066] The third nozzle 23 has a configuration similar to that of the first nozzle 21 and the second nozzle 22, and therefore will not be illustrated or described in detail. However, the third nozzle 23 has a head that is hexagonal when viewed from above, a cylindrical leg with a screw thread on its outer periphery, and a 0.75 mm diameter hole that extends linearly from the center of the top surface of the head to the tip of the leg along the axial direction of the leg, and the screw thread threads into the screw groove 13b4 of the second space 13b. Due to this threading, the third nozzle 23 is attached to the second space 13b (specific space 13), and condensed water introduced into the main body 2 moves from the first space 13a to the discharge space 14 through the hole of the third nozzle 23.

[0067] In the following description, the diameter of the nozzle hole will be referred to as the "nozzle hole diameter" where appropriate.

[0068] The first strainer 31 will be described with reference to Figure 11. Figure 11(a) is a schematic diagram of the first strainer 31 as seen from the front. Figure 11(b) is a schematic diagram of the first strainer 31 as seen from the top or bottom.

[0069] The first strainer 31 is made of a metal material. The first strainer 31 is formed in a hollow cylindrical shape with both ends 31a open. The first strainer 31 is disposed in the first space 11a of the specific space 11 and filters out foreign matter present in the first space 11a (described in detail below). The first detachable part 3 is configured to fit into the opening 31b of the first strainer 31 (described in detail below).

[0070] The second strainer 32 has the same configuration as the first strainer 31, so it is not shown in the illustration, but the second strainer 32 is formed in a hollow cylindrical shape with both ends open, and is placed in the first space 12a of the specific space 12 to filter out foreign matter present in the first space 12a.

[0071] The third strainer 33 has the same configuration as the first strainer 31 and the second strainer 32, so it is not shown in the illustration, but the third strainer 33 is formed in a hollow cylindrical shape with both ends open, and is placed in the first space 13a of the specific space 13 to filter out foreign matter present in the first space 13a.

[0072] The first detachable part 3 will be described using Figure 12. Figure 12(a) is a schematic diagram of the first detachable part 3 seen from the front. Figure 12(b) is a schematic diagram of the first detachable part 3 seen from the bottom. Figure 12(c) is an enlarged view of a portion of the first detachable part 3.

[0073] The first detachable part 3 is mainly made of a metal material and includes a cover part 3a, a screw shaft part 3b, and a protrusion part 3c.

[0074] The lid portion 3a is formed in a hexagonal shape in plan view.

[0075] The threaded shaft portion 3b is integral with the lid portion 3a and extends from the center of the lid portion 3a. The threaded shaft portion 3b has a screw thread 3d on its outer periphery. The screw thread 3d is threadedly engaged with the screw groove 11a6 in the first space 11a. The first detachable portion 3 is attached to the main body 2 by sealing the opening 11c through the engagement of the screw thread 3d with the screw groove 11a6 (described in detail below). Note that detailed illustration of the screw thread 3d is omitted in FIG. 12.

[0076] The protrusion 3c is formed in a cylindrical shape. The protrusion 3c is integrally formed with the screw shank 3b and is arranged coaxially with the screw shank 3b. The protrusion 3c extends linearly from the end of the screw shank 3b toward one side of the axial direction of the screw shank 3b (downward in FIG. 12).

[0077] The outer diameter of the protrusion 3c is smaller than the outer diameter of the threaded shaft portion 3b, and a flat step surface 3e facing in the one direction (downward as shown in FIG. 12) is formed between the protrusion 3c and the threaded shaft portion 3b. The protrusion 3c fits into an opening 31b of the first strainer 31. When the protrusion 3c fits into the opening 31b, the end 31a of the first strainer 31 abuts against the step surface 3e (described in detail below).

[0078] The second detachable part 4 has the same configuration as the first detachable part 3, so its illustration and detailed description will be omitted, but the second detachable part 4 is mainly composed of a threaded shaft part with a screw thread formed on its outer periphery, and a protrusion that is arranged coaxially with the threaded shaft part and has an outer diameter smaller than that of the threaded shaft part, and the threaded shaft part has a flat step surface facing in one axial direction between the threaded shaft part and the protrusion, and is configured so that when the protrusion is fitted into the opening of the second strainer 32, the end of the second strainer 32 abuts against the step surface.

[0079] The third detachable portion 5 has a similar configuration to the first detachable portion 3 and the second detachable portion 4, and therefore will not be illustrated or described in detail, but is mainly composed of a threaded shaft portion having a screw thread formed on its outer periphery, and a protrusion that is arranged coaxially with the threaded shaft portion and has an outer diameter smaller than that of the threaded shaft portion, and the threaded shaft portion has a flat step surface facing in one axial direction between the threaded shaft portion and the protrusion, and is configured so that when the protrusion is fitted into the opening of the third strainer 33, the end of the third strainer 33 abuts against the step surface.

[0080] The jig 40 will be described with reference to Figure 13. The jig 40 is used by an operator to attach and detach the nozzles 21 to 23 to and from the interior (second spaces 11b, 12b, 13b) of the main body 2. In the following description of the jig 40, the first nozzle 21 will be used.

[0081] 13(a) is a schematic diagram of a jig 40 seen from the front. The jig 40 is made of a metal material. The jig 40 is cross-shaped and has a first hole 41a at one end 41 and a second hole 42a at the other end 42.

[0082] The first hole 41a is a hole for firmly fastening the first nozzle 21 in the second space 11b, and also a hole for loosening the first nozzle 21 that is firmly attached to the second space 11b.

[0083] The second hole 42a is a hole for loosely fastening (temporarily fastening) the first nozzle 21 in the second space 11b. The second hole 42a is a hole for removing the first nozzle 21 that has been temporarily fastened in the second space 11b from the second space 11b.

[0084] The jig 40 includes a first tubular body 43 , a handle portion 44 , and a second tubular body 45 .

[0085] FIG. 13(b) is a cross-sectional view of the first tubular body 43 taken along line CC in FIG. 13(a).

[0086] The first tubular body 43 is formed integrally with the handle portion 44 and extends linearly from the center of the handle portion 44. The first tubular body 43 has a first hole 41a at the end portion 41. The first hole 41a is formed in a hexagonal shape. The first hole 41a opens toward one direction in the axial direction of the first tubular body 43 (hereinafter referred to as "one direction"). The first hole 41a is formed with a size that allows the head portion 21a of the first nozzle 21 to fit into it without any gaps.

[0087] The handle 44 is formed in a cylindrical shape and extends linearly in a direction perpendicular to the axial direction of the first tubular body 43.

[0088] FIG. 13(c) is a cross-sectional view of the second tubular body 45 taken along the line DD in FIG. 13(a).

[0089] The second tubular body 45 is integrally formed with the handle portion 44. The second tubular body 45 extends linearly from the center of the handle portion 44 in the opposite direction (hereinafter referred to as the "opposite direction") to the one direction. The second tubular body 45 and the first tubular body 43 are arranged coaxially.

[0090] The second tubular body 45 has a plurality of pressure plates 45a. As shown in Fig. 13(c), the plurality of pressure plates 45a are arranged at predetermined intervals in the circumferential direction when viewed from the opposite direction toward the one direction (when viewed from below toward above in Fig. 13(a)). In other words, a plurality of gaps are formed between adjacent pressure plates 45a in the circumferential direction of the central axis of the second tubular body 45.

[0091] The second hole 42a is a hole defined by a plurality of pressure plates 45a. The second hole 42a expands due to elastic deformation of the plurality of pressure plates 45a. The plurality of pressure plates 45a grip the head 21a of the first nozzle 21 as the second hole 42a expands. More specifically, when the head 21a enters the second hole 42a, the free end of the pressure plate 45a moves in a direction away from the central axis of the second tubular body 42, expanding the second hole 42a, and the first nozzle 21 is gripped by the plurality of pressure plates 45a.

[0092] In the first embodiment, the second hole 42a is defined by four pressing plates 45a, but this is not limiting, and the second hole 42a may be defined by, for example, two pressing plates 45a.

[0093] A method for attaching the first nozzle 21 will be described with reference to FIG.

[0094] First, the worker inserts the head 21a of the first nozzle 21 into the second hole 42a (not shown) of the jig 40. At this time, the first nozzle 21 is inserted into the second hole 42a so that the leg portion 21b of the first nozzle 21 is exposed from the second hole 42a (see FIG. 14(a)).

[0095] Next, the worker holds the handle portion 44 of the jig 40 so that the second hole 42a faces the opening 11c of the main body 2, and inserts the second tubular body 45 of the jig 40 into the first space 11a through the opening 11c (Figure 14(a)).

[0096] Next, the worker brings the leg 21b of the first nozzle 21 close to the second space 11b, and when the leg 21b reaches the thread groove 11b4 of the second space 11b, rotates the jig 40 in a predetermined direction around the axis of the jig 40 (the axis of the tubular bodies 43, 45) to thread the thread 21d of the first nozzle 21 into the thread groove 11b4 of the second space 11b (FIG. 14(b)). At this time, the worker loosely fastens (temporarily fastens) the first nozzle 21 in the second space 11b.

[0097] Next, the worker moves the second pipe 45 out through the opening 11c (not shown), and then changes the grip of the jig 40 so that the first hole 41a of the first pipe 43 faces the opening 11c of the main body 2, and moves the first pipe 43 into the first space 11a through the opening 11c (not shown).

[0098] Next, the worker brings the first hole 41a close to the second space 11b, and when the first hole 41a reaches the first nozzle 21 temporarily fixed in the second space 11b, inserts the head 21a of the first nozzle 21 into the first hole 41a (FIG. 14(c)). At this time, the head 21a fits snugly into the first hole 41a.

[0099] Finally, the worker rotates the jig 40 in a predetermined direction around the axis of the jig 40 to further thread the thread 21d into the screw groove 11b4, thereby firmly attaching the first nozzle 21 to the second space 11b (see FIG. 15).

[0100] Although illustration and description are omitted, similarly to the first nozzle 21, the worker attaches the second nozzle 22 to the second space 12b and the third nozzle 23 to the second space 13b.

[0101] Fig. 15 is an explanatory diagram for explaining a state in which the first nozzle 21, the second nozzle 22, and the third nozzle 23 are held in the second space 11b, the second space 12b, and the second space 13b, respectively. For convenience of explanation, Fig. 15 shows the main body 2 in a cross section taken along line AA in Fig. 4(b), and the first nozzle 21 in a cross section taken along line BB in Fig. 10.

[0102] 15, the first nozzle 21 is held in the second space 11b so that the pore 21c extends in the Z direction. The second nozzle 22 is held in the second space 12b so that the pore of the second nozzle 22 extends in the X direction. The third nozzle 23 is held in the second space 13b so that the pore of the third nozzle 23 extends in the Z direction.

[0103] A method for attaching the first detachable part 3 and the first strainer 31 will be described with reference to FIG.

[0104] The worker first inserts the protrusion 3c of the first detachable part 3 into one of the openings 31b of the first strainer 31. At this time, the protrusion 3c is inserted into the opening 31b until one of the ends 31a of the first strainer 31 abuts against the stepped surface 3e of the first detachable part 3 (FIG. 16(a)). As a result, the first strainer 31 and the first detachable part 3 form a pair of members.

[0105] Next, the worker inserts the pair of components into the first space 11a through the opening 11c (Figure 16(b)), and then rotates the cover portion 3a of the first detachable portion 3 in a predetermined direction around the axis of the first detachable portion 3 (screw shaft portion 3b) to screw the screw thread 3d of the first detachable portion 3 into the screw groove 11a6 of the first space 11a (not shown).

[0106] As a result, the first detachable part 3 seals the opening 11c and is attached to the main body 2. At this time, the other end 31a of the first strainer 31 abuts against the flat wall 11a5, and the outer circumferential surface of the first strainer 31 contacts the inner circumferential surface of the cylindrical wall 11a4 (see FIG. 17). In addition, the first strainer 31 covers the fine hole 21c (head 21a) of the first nozzle 21 attached to the second space 11b.

[0107] FIG. 17 is an explanatory diagram for explaining a state in which the first nozzle 21, the first strainer 31, and the first detachable part 3 are attached to the main body 2. As shown in FIG.

[0108] As shown in FIG. 17, when the first detachable part 3 is attached to the main body 2, the movement of the first strainer 31 in the X and Y directions is restricted by the cylindrical wall 11a4, the movement in the Z1 direction is restricted by the flat wall 11a5, and the movement in the Z2 direction is restricted by the first detachable part 3 (step surface 3e).

[0109] FIG. 18 is an explanatory diagram for explaining a state in which the nozzles 21 to 23, the strainers 31 to 33, and the detachable parts 3 to 5 are attached to the main body 2, respectively.

[0110] Although illustrations and detailed explanations are omitted regarding the method of attaching the second detachable part 4 and the second strainer 32, similar to the first detachable part 3 and the first strainer 31, the worker inserts the protrusion of the second detachable part 4 into one of the openings of the second strainer 32 until one of the ends of the second strainer 32 abuts against the stepped surface of the second detachable part 4, and then advances the pair of members, the second detachable part 4 and the second strainer 32, into the first space 12a through the opening 12c of the specific space 12. After that, the worker rotates the cover of the second detachable part 32 in a predetermined direction around the axis of the second detachable part 4, and screws the threads of the second detachable part 4 into the thread groove 12a3 of the first space 12a. In this way, the second detachable part 4 and the second strainer 32 are attached to the main body 2. At this time, the other end of the second strainer 32 abuts against the right side wall 12a2, and the outer circumferential surface of the second strainer 32 contacts the inner circumferential surface of the cylindrical wall 12a1. In addition, the second strainer 32 covers the pores (heads) of the second nozzle 22 attached to the second space 12b.

[0111] As shown in Figure 18, when the second detachable part 4 and the second strainer 32 are attached to the main body 2, the movement of the second strainer 32 in the Y and Z directions is restricted by the cylindrical wall 12a1, the movement in the X1 direction is restricted by the right side wall 12a2, and the movement in the X2 direction is restricted by the second detachable part 4.

[0112] Although illustrations and detailed explanations are omitted regarding the method of attaching the third detachable part 5 and the third strainer 33, similar to the first detachable part 3 and the first strainer 31, the worker inserts the protrusion of the third detachable part 5 into one of the openings of the third strainer 33 until one of the ends of the third detachable part 5 abuts the stepped surface of the third detachable part 5. After the pair of members, the third detachable part 5 and the third strainer 33, enter the first space 13a through the opening 13c, the worker then rotates the cover of the third detachable part 5 in a predetermined direction around the axis of the third detachable part 5, threading the threads of the third detachable part 5 into the thread groove 13a3 of the first space 13a. In this way, the third detachable part 5 and the third strainer 33 are attached to the main body 2. At this time, the other end of the third strainer 33 is in contact with the bottom wall 13a2, and the outer circumferential surface of the third strainer 33 is in contact with the inner circumferential surface of the cylindrical wall 13a1. In addition, the pores (heads) of the third nozzle 23 attached to the second space 13b are covered by the third strainer 33.

[0113] As shown in FIG. 18, when the third detachable part 5 and the third strainer 33 are attached to the main body 2, the movement of the third strainer 33 in the X and Y directions is restricted by the cylindrical wall 13a1, the movement in the Z2 direction is restricted by the bottom wall 13a2, and the movement in the Z1 direction is restricted by the third detachable part 5.

[0114] In the first embodiment, as described above, the worker first integrates the strainer and the detachable part, then inserts this integrated pair of components into the first space through the opening of the first space, and then attaches the detachable part to the main body by threading the threads of the detachable part into the thread groove of the first space. However, this is not limited to this method, and the worker may first insert only the strainer into the first space through the opening of the first space, abut the other end of the strainer against the opposing wall facing the first space formed between the first space and the second space, and then insert the protrusion of the detachable part into one of the openings of the strainer, and then thread the threads of the detachable part into the thread groove of the first space to attach the strainer and the detachable part to the main body.

[0115] Here, nozzle-type steam straps discharge condensate to the outside through a nozzle. Therefore, the processing capacity for introducing and discharging condensate depends on the nozzle hole diameter. In production lines in factories and other places, the amount of steam used must be changed in response to environmental changes, such as changing the object being heated with steam. As the amount of steam used increases, the amount of condensate generated also increases, and as the amount of steam used decreases, the amount of condensate generated also decreases. When the amount of condensate generated exceeds the processing capacity of the steam strap, condensate accumulates in the production line piping. Condensate accumulated in the piping lowers the steam temperature, thereby reducing the heating effect of the steam. Furthermore, condensate accumulated in the piping can cause water hammer. For this reason, factories and other places tend to install steam straps with processing capacities that far exceed the maximum value of the fluctuation in condensate amount (i.e., steam traps with nozzles with large hole diameters) on their piping to prevent condensate from accumulating in the piping (to be able to respond to fluctuations in the amount of condensate). However, increasing the nozzle hole diameter makes it easier for steam to leak through the hole, reducing the heating effect of the steam and resulting in issues such as an increase in the defective rate of the produced objects.

[0116] To address the above-mentioned problem, the steam strap 1 according to the first embodiment provides a second space in each of the specific spaces to which a nozzle can be detachably attached, thereby making it possible to prevent steam leakage even if the hole diameter of each nozzle is relatively large. This will be explained below with reference to FIG.

[0117] 19 is a schematic diagram showing the steam trap 1 attached to a pipe D. As shown in the figure, the inlet 6 is attached to one side D1 of the pipe D, and the outlet 7 is attached to the other side D2 of the pipe D.

[0118] 19, as an example, the steam trap 1 is installed in an environment where the temperature of steam to be generated in the boiler is approximately 160°C, the pressure of the 160°C steam is approximately 0.6 mph, and the amount of condensed water per unit time introduced into the first space 11a from the inlet 6 (piping D1) varies between approximately 25 kg / h and approximately 31 kg / h. Note that for ease of explanation, some of the detachable parts, the strainer, and the nozzle are not shown in FIG. 19.

[0119] In the example shown in Figure 19, the worker uses a nozzle with a hole diameter of 0.75 mm and installs steam straps 1 with this nozzle attached to each second space on pipe D. The nozzle with a hole diameter of 0.75 mm has the capacity to pass approximately 31 kg of condensed water per unit time under a pressure of approximately 0.6 mph. In other words, Figure 19 shows an example in which a nozzle with a discharge capacity equivalent to the maximum amount of condensed water generated per unit time, approximately 31 kg / h, is attached to each second space on a production line (piping) where the amount of condensed water generated per unit time varies between approximately 25 kg / h and approximately 31 kg / h.

[0120] First, the condensed water and steam enter the first space 11a (specific space 11) from the inlet 6 via the pipe D1.

[0121] A facing region 11a41 facing the inlet 6 is formed in the first space 11a, and the first nozzle 21 is attached to the second space 11b so that the axis of the first nozzle 21 faces a direction substantially perpendicular to the axial direction of the pipe D1 (i.e., the Z direction shown in FIG. 19 ; in other words, a direction substantially perpendicular to the direction in which condensed water enters the first space 11a from the inlet 6). Therefore, the pressure of the condensed water that enters the first space 11a from the pipe D1 is reduced by the facing region 11a41, and then the condensed water reaches the first nozzle 21 (opening 11b1 of the second space 11b). At this time, the condensed water reaches the first nozzle 21 before the steam due to the difference in kinetic viscosity between the steam and the condensed water, and passes through the pores 21c of the first nozzle 21.

[0122] For example, assume that the amount of condensed water entering the first space 11a from the pipe D1 is the maximum value (approximately 31 kg / h). Here, the hole diameter of the first nozzle 21 is 0.75 mm, and the pressure of the condensed water reaching the first nozzle 21 is reduced by the opposing region 11a41. Therefore, the amount of condensed water passing through the first nozzle 21 per unit time, i.e., the amount of condensed water entering the first space 11a from the first space 11a into the first space 12a (hereinafter referred to as the "passing amount A"), is approximately 30 kg / h. Meanwhile, the steam that reaches the first nozzle 21 is prevented from passing through the pores 21c of the first nozzle 21 by the condensed water that has previously passed through the pores 21c. However, because the diameter of the pores 21c is set to a relatively large value of 0.75 mm, some of the steam can pass through the pores 21c.

[0123] Next, the condensed water that has passed through the pores 21c of the first nozzle 21 enters the specific space 12 (first space 12a).

[0124] The specific space 12 includes a first space 12a having an opposing region 12a11, and a second space 12b that holds the second nozzle 22 so that the axis of the second nozzle 22 faces in a direction that is approximately perpendicular to the axial direction of the first nozzle 21 (i.e., the X direction shown in FIG. 19; in other words, a direction that is approximately perpendicular to the direction in which condensed water enters the first space 12a from the second space 11b (first nozzle 21)). Therefore, the condensed water that enters the first space 12a reaches the second nozzle 22 (opening 12b1 of the second space 12b) after its pressure is reduced by the opposing region 12a11.

[0125] Here, the diameter of the pores of the second nozzle 22 is set to a relatively large value of 0.75 mm that allows steam to pass through, similar to the first nozzle 21. However, since the kinetic viscosity of condensed water is smaller than that of steam and the amount of steam that can enter the first space 12a from the first space 11a is small, the condensed water that has entered the first space 12a reaches the second nozzle 22 before the steam that has entered the first space 12a and passes through the pores of the second nozzle 22, while the passage of this steam is almost entirely prevented by the second nozzle 22.

[0126] For example, as described above, assume that the amount of condensed water entering the first space 12a (passing amount A) is approximately 30 kg / h. In this case, the pressure of the condensed water reaching the second nozzle 22 is reduced compared to the pressure of the condensed water introduced from the inlet 6, and therefore the amount of condensed water passing through the second nozzle 22 per unit time (hereinafter referred to as "passing amount B") decreases to approximately 24 kg / h.

[0127] Finally, the condensed water that has passed through the second nozzle 22 enters the specific space 13 (first space 13a).

[0128] The specific space 13 includes a first space 13a having an opposing region 13a11, and a second space 13b that holds the third nozzle 23 so that the axis of the third nozzle 23 faces in a direction that is approximately perpendicular to the axial direction of the second nozzle 22 (i.e., the Z direction shown in FIG. 19; in other words, a direction that is approximately perpendicular to the direction in which condensed water enters the first space 13a from the second space 12b (second nozzle 22)). Therefore, the condensed water that enters the first space 13a reaches the third nozzle 23 (opening 13b1 of the second space 13b) after its pressure is reduced by the opposing region 13a11.

[0129] Here, the diameter of the pores of third nozzle 23 is set to a relatively large value of 0.75 mm that allows steam to pass through, similar to first nozzle 21. However, because the kinetic viscosity of condensed water is smaller than that of steam and the amount of steam that can enter first space 13a is small, the condensed water that has entered first space 13a reaches third nozzle 23 before the steam that has entered first space 13a and passes through the pores of third nozzle 23, while the steam is prevented from passing through by third nozzle 23.

[0130] For example, as described above, assume that the amount of condensed water that entered first space 13a (passing amount B) was approximately 24 kg / h. In this case, the pressure of the condensed water that reached third nozzle 23 is reduced compared to the pressure of the condensed water that was introduced into first space 12a, and therefore the amount of condensed water passing through third nozzle 23 per unit time (hereinafter referred to as "passing amount C") decreases to approximately 20 kg / h.

[0131] The condensed water that has passed through the pores of the third nozzle 23 moves to the discharge space 14, and is then discharged to the outside of the main body 2 (through the piping D2) via the discharge port 7. The condensed water discharged from the discharge port 7 is reused, for example, as water to be supplied to a boiler.

[0132] As described above, in an environment in which the amount of condensed water generated fluctuates between approximately 25 kg / h and approximately 31 kg / h, if the maximum amount of approximately 31 kg / h is introduced into first space 11a, the amount A of condensed water passing through first nozzle 21 per unit time will be approximately 30 kg / h, the amount B of condensed water passing through second nozzle 22 per unit time will be approximately 24 kg / h, and the amount C of condensed water passing through third nozzle 23 per unit time will be approximately 20 kg / h. In other words, with a steam trap 1 in which nozzles with a hole diameter of 0.75 mm are attached to each second space, approximately 31 kg of condensed water can be introduced into main body 2 per hour (unit time), and approximately 20 kg of condensed water can be discharged to the outside of main body 2 per hour, in relation to the approximately 31 kg of condensed water introduced. For example, a steam trap having only one nozzle with a hole diameter of 0.75 mm can introduce approximately 31 kg of condensed water per hour and discharge approximately 31 kg of condensed water per hour to the outside, but steam will leak to the outside. Thus, even if the steam strap 1 according to the first embodiment uses a nozzle with a hole diameter that allows steam to pass through, the nozzles attached to each of the second spaces 11b, 12b, and 13b can reliably prevent steam leakage and allow only condensed water to be continuously discharged from the discharge port 7.

[0133] A method for removing the first detachable part 3, the first strainer 31, and the first nozzle 21 will be described with reference to FIG.

[0134] First, the worker rotates the cover portion 3a around the axis of the first detachable portion 3 in the direction opposite to the predetermined direction, thereby screwing the thread 3d of the first detachable portion 3 out of the thread groove 11a6 of the first space 11a (not shown).

[0135] Next, the worker removes the pair of members, the first detachable part 3 and the first strainer 31, from the main body 2, and opens the opening 11c (not shown).

[0136] Next, the worker holds the handle portion 44 so that the first hole 41a of the jig 40 faces the opening 11c of the main body 2, and inserts the first tubular body 43 of the jig 40 into the first space 11a through the opening 11c, bringing the first hole 41a of the first tubular body 43 close to the second space 11b (see Figure 20(a)).

[0137] Next, the worker inserts the head 21a of the first nozzle 21, which is firmly fixed in the second space 11b, into the first hole 41a of the jig 40 (FIG. 20(a)). At this time, the head 21a of the first nozzle 21 fits snugly into the first hole 41a.

[0138] Next, the worker rotates the jig 40 in the opposite direction around the axis of the jig 40. This causes the thread 21d of the first nozzle 21 to be screwed out of the thread groove 11b4 of the second space 11b, and the first nozzle 21 is temporarily fixed to the second space 11b (FIG. 20(b)).

[0139] Next, the worker first withdraws the first tubular body 43 of the jig 40 from the opening 11c to the outside, then changes the grip of the jig 40 so that the second hole 42a of the jig 40 faces the opening 11c of the main body 2, and inserts the second tubular body 45 of the jig 40 into the first space 11a through the opening 11c (Figure 20(c)).

[0140] Next, the worker presses the end of the second tubular body 45 (the free ends of the multiple pressing plates 45a) against the head 21a of the first nozzle 21 that is temporarily fastened in the second space 11b, inserts the head 21a into the second hole 42a, and then rotates the jig 40 in the opposite direction around the axis of the jig 40 to remove the first nozzle 21 from the second space 11b (not shown). At this time, the first nozzle 21 is held in the second hole 42a by the multiple pressing plates 45a.

[0141] Finally, the worker moves the second pipe body 45 of the jig 40 outward through the opening 11c, and then removes the first nozzle 21 inserted into the second hole 42a.

[0142] As described above, in the steam strap 1 according to the first embodiment, a specific space 113 is formed in the flow path 8, and the specific space 11 includes a first space 11a that is open to the outside on one side, and this opening 11c is sealed by the first detachable part 3. Therefore, without removing the steam strap 1 from the piping D, it is possible to check the state of the first space 11a, such as the state of condensed water accumulation and whether or not foreign matter has been mixed in, simply by removing the first detachable part 3 from the main body 2.

[0143] Furthermore, in the steam strap 1 according to the first embodiment, a second space 11b adjacent to the first space 11a is formed downstream of the first space 11a, and the second space 11b is configured to detachably hold the first nozzle 21. Therefore, the first nozzle 21 can prevent the passage of steam introduced from the inlet 6 into the first space 11a.

[0144] Furthermore, in the steam strap 1 according to the first embodiment, a specific space 12 is formed downstream of the specific space 11 and adjacent to the specific space 11. The specific space 12 includes a first space 12a and a second space 12b, similar to the specific space 11. The opening 12c of the first space 12a is sealed by the second detachable part 4, and the second space 12b detachably holds the second nozzle 22. Therefore, the state of the first space 12a (the accumulation state of condensed water, etc.) can be checked simply by removing the second detachable part 4 from the main body 2 without removing the steam strap 1 from the piping D. Furthermore, even if part of the steam introduced into the specific space 11 from the inlet 6 passes through the pores 21c of the first nozzle 21 and enters the first space 12a, the second nozzle 22 can prevent the steam from passing through.

[0145] Furthermore, in the steam strap 1 according to the first embodiment, a specific space 13 is formed adjacent to the specific space 12 downstream of the specific space 12, and like the specific space 12, the specific space 13 includes a first space 13a and a second space 13b. The opening 13c of the first space 13a is sealed by the third detachable part 5, and the second space 13b detachably holds the third nozzle 23. Therefore, the state of the first space 13a (such as the accumulation state of condensed water) can be checked simply by removing the third detachable part 5 from the main body 2 without removing the steam strap 1 from the piping D. Furthermore, even if part of the steam introduced from the first nozzle 21 into the first space 12a passes through the pores of the second nozzle 22 and enters the first space 13a, the third nozzle 23 can prevent the steam from leaking from the outlet 7 to the outside of the steam strap 1.

[0146] In the steam strap 1 according to the first embodiment, the second space 11b of the specific space 11 is formed at a position facing the opening 11c of the first space 11a and is configured to be connected to this opening 11c via the first space 11a. Therefore, for example, if a defect occurs in the first nozzle 21 attached to the second space 11b, the first nozzle 21 attached to the second space 11b can be easily replaced by simply attaching and detaching the first detachable part 3 from the main body 2 without removing the steam strap 1 from the piping D.

[0147] In particular, in the steam strap 1 according to the first embodiment, the first nozzle 21 can be attached and detached simply by attaching and detaching the first detachable part 3, so the hole diameter of the nozzle attached to the second space 11b can be easily changed. This allows the steam strap 1 to quickly respond to fluctuations in the amount of condensed water generated on the production line.

[0148] For example, if the amount of condensed water introduced into the first space 11a from the pipe D1 (inlet 6) after the steam strap 1 is attached to the pipe D is greater than the amount expected by the operator, the nozzle attached to the second space 11b can be replaced with a new nozzle with a larger bore diameter to increase the amount of condensed water remaining in the first space 12a, in other words, the amount of condensed water passing through the pores of the nozzle attached to the second space 11b per unit time, thereby responding to the amount of condensed water generated. In this case, increasing the bore diameter of the nozzle attached to the second space 11b allows steam to pass through. However, in the steam strap 1 according to the first embodiment, the second space 12b that holds the second nozzle 22 and the second space 13b that holds the third nozzle 23 are formed downstream of the second space 11b. Therefore, even if the bore diameter of the nozzle attached to the second space 11b is increased, the second nozzle 22 and the third nozzle 23 can prevent steam leakage.

[0149] The second space 12b of the specific space 12, like the second space 11b, is formed at a position opposite the opening 12c of the first space 12a and is connected to the opening 12c via the first space 12a. Therefore, the second nozzle 22 held in the second space 12b can be replaced or the nozzle diameter can be changed, for example, by simply removing the second detachable part 4 from the main body 2 without removing the steam strap 1 from the piping D.

[0150] The second space 13b of the specific space 13, like the second space 11b, is formed at a position opposite the opening 13c of the first space 13a and is configured to be connected to the opening 13c via the first space 13a. Therefore, the third nozzle 23 held in the second space 13b can be replaced or the nozzle diameter can be changed, etc., by simply removing the third detachable part 5 from the main body 2 without removing the steam strap 1 from the piping D.

[0151] In the first embodiment, the first detachable portion 3 corresponds to opening 11c, the second detachable portion 4 corresponds to opening 12c, and the third detachable portion 5 corresponds to opening 13c, and the first detachable portion 3 seals opening 11c, the second detachable portion 4 seals opening 12c, and the third detachable portion 5 seals opening 13c. However, this is not limited to this, and in order to improve versatility, for example, the detachable portions 3 to 5 may correspond to each of the openings 11c to 13c so that opening 11c can be sealed with any of the detachable portions 3, 4, and 5.

[0152] In the steam strap 1 according to the first embodiment, the first nozzle 21 is configured to be attached to the second space 11b so that the axial direction of the first nozzle 21 (the fine holes 21c) is approximately perpendicular to the direction of entry of condensed water introduced from the inlet 6 into the specific space 11 (the axial direction of the pipe D). Therefore, the condensed water introduced from the inlet 6 into the first space 11a first collides with the opposing region 11a41 and then reaches the first nozzle 21. In other words, the condensed water introduced from the inlet 6 into the first space 11a reaches the first nozzle 21 after its pressure is reduced by the opposing region 11a41. This reduces damage to the first nozzle 21 caused by the condensed water.

[0153] Similarly, the first space 12a is provided with an opposing region 12a11 that faces the first nozzle 21 in the axial direction, and the second nozzle 22 is attached to the second space 12b so that the axial direction of the second nozzle 22 is approximately perpendicular to the direction in which condensed water enters the specific space 12 from the first nozzle 21 (second space 11b), i.e., the axial direction of the first nozzle 21. Therefore, the condensed water that passes through the first nozzle 21 and is introduced into the first space 12a reaches the second nozzle 22 after its pressure is reduced by the opposing region 12a11. This makes it possible to reduce damage to the second nozzle 22 due to the condensed water.

[0154] Similarly, a facing region 13a11 that faces the second nozzle 22 in the axial direction is provided in the first space 13a, and the third nozzle 23 is attached to the second space 13b so that the axial direction of the third nozzle 23 is approximately perpendicular to the direction in which condensed water enters the specific space 13 from the second nozzle 22 (second space 12b), i.e., the axial direction of the second nozzle 22. Therefore, the condensed water that passes through the second nozzle 22 and is introduced into the first space 13a reaches the third nozzle 23 after its pressure is reduced by the facing region 13a11. This makes it possible to reduce damage to the third nozzle 23 due to condensed water.

[0155] As described above, in the steam strap 1 according to the first embodiment, a plurality of specific spaces are provided in the flow path of the condensed water, and each of these plurality of specific spaces is configured to include a second space that holds a nozzle, and these second spaces include second spaces 11b, 13b that hold the nozzle so that the nozzle axis extends in the Z direction (first direction), and second space 12b that holds the nozzle so that the nozzle axis extends in the X direction (second direction different from the first direction), and the condensed water introduced into the inside of the main body 2 of the steam strap 1 is configured to first pass through second space 11b, then second space 12b, and finally second space 13b before being discharged to the outside of the main body 2. Therefore, the steam strap 1 can reduce damage to each nozzle compared to a steam strap in which the axes of the nozzles all extend in the same direction.

[0156] In the steam strap 1 according to the first embodiment, the first space 11a is provided with an opposing region 11a41 with which the condensed water collides. This allows foreign matter such as rust contained in the condensed water introduced from the pipe D1 to adhere to the opposing region 11a41, thereby preventing the foreign matter from entering the pores 21c of the first nozzle 21.

[0157] In the steam strap 1 according to the first embodiment, the specific space 11 includes a first space 11a and a second space 11b. The first space 11a is located upstream of the second space 11b and adjacent to the second space 11b, and is configured to allow a first strainer 31 to be installed therein, thereby enabling the removal of foreign matter present in the first space 11a.

[0158] In particular, when the first strainer 31 is disposed in the first space 11a, it covers the opening 12b1 (the pore 21c of the first nozzle 21) of the second space 11b, thereby preventing foreign matter from entering the pore 21c of the first nozzle 21 attached to the second space 11b. Note that, similar to the first space 11, the first spaces 12 and 13 are also configured to be able to accommodate strainers, so that damage to the steam strap 1 due to foreign matter can be prevented.

[0159] In the steam strap 1 according to the first embodiment, the strainers 31 to 33 can be removed from the main body 2 simply by removing the detachable parts 3 to 5 from the main body 2, without removing the steam strap 1 from the piping D, and foreign matter that has entered the main body 2 can be removed or the strainers can be replaced with new ones.

[0160] In the steam strap 1 according to the first embodiment, the first detachable part 3 includes a threaded shank 3b having a thread 3d formed on its outer periphery and a protrusion 3c arranged coaxially with the threaded shank 3b and having a smaller outer diameter than the threaded shank 3b. The threaded shank 3b has a flat stepped surface 3e facing one axial direction between the threaded shank 3b and the protrusion 3c. When the protrusion 3c is fitted into one of the openings of the first strainer 31, the end of the first strainer 31 abuts against the stepped surface 3e. Therefore, the first detachable part 3 functions to position the first strainer 31 in the first space 11a. The second detachable part 4 functions to position the second strainer 32, and the third detachable part 5 functions to position the third strainer 33.

[0161] In the steam strap 1 according to the first embodiment, the first space 11a is a space defined by a plurality of walls, and these walls include a flat wall (opposing wall) 11a5 that faces an opening 11c provided on one side of the first space 11a. This flat wall 11a5 is formed between the first space 11a and the second space 11b and restricts movement of the first strainer 31 in the attachment direction to the main body 2 (the Z1 direction shown in FIGS. 7 and 17). The first detachable part 3 restricts movement of the first strainer 31 in the direction opposite to the attachment direction to the main body 2 (the Z2 direction shown in FIGS. 7 and 17) when the opening 11c of the first space 11a is sealed. This prevents the first strainer 31 from falling off due to the pressure of condensed water or the like.

[0162] The multiple walls defining the first space 11a include a cylindrical wall 11a4, which contacts the peripheral surface of the first strainer 31 and restricts movement of the first strainer 31 in the X and Y directions in Figures 7 and 17.

[0163] In this way, in the steam strap 1 according to the first embodiment, the cylindrical wall 11a4, the flat wall 11a5, and the first detachable portion 3 can restrict movement of the first strainer 31 in all of the X, Y, and Z directions.

[0164] Similarly, first space 12a is a space defined by multiple walls, including a right side wall (opposing wall) 12a2 facing opening 12c provided on one side of second space 12a, and a cylindrical wall 12a1. Right side wall 12a2 is formed between first space 12a and second space 12b and restricts movement of second strainer 32 in the mounting direction relative to main body 2 (X1 direction shown in FIG. 8). Cylindrical wall 12a1 contacts the circumferential surface of second strainer 32 and restricts movement in the Z and Y directions in FIG. 8. Second detachable part 4, with opening 12c sealed, restricts movement of second strainer 32 in the direction opposite to the mounting direction relative to main body 2 (X2 direction shown in FIG. 8). This prevents second strainer 32 from falling off due to the pressure of condensed water, etc.

[0165] Similarly, first space 13a is a space defined by multiple walls, including a bottom wall (opposing wall) 13a2 facing opening 13c provided on one side of second space 13a, and a cylindrical wall 13a1. Bottom wall 13a2 is formed between first space 13a and second space 13b and restricts movement of third strainer 33 in the mounting direction relative to main body 2 (Z2 direction shown in FIG. 9). Cylindrical wall 13a1 contacts the circumferential surface of third strainer 33 and restricts movement in the X and Y directions in FIG. 9. Third detachable part 5, with opening 13c sealed, restricts movement of third strainer 33 in the direction opposite to the mounting direction relative to main body 2 (Z1 direction shown in FIG. 9). This prevents third strainer 33 from falling off due to the pressure of condensed water, etc.

[0166] In the first embodiment, the steam strap 1 is installed on the pipe D so that the inlet 6 is located below the second detachable part 4 (see FIGS. 2 and 19), that is, so that the specific space 11 is located below the specific space 12 (Z2 shown in FIG. 5), but the configuration is not limited to this. The steam strap 1 may also be installed on the pipe D so that the specific space 11 is located above the specific space 12, or the steam strap 1 may be installed on the pipe D so that the specific spaces 11 and 12 are aligned in the left-right direction (Y direction shown in FIG. 2). Even when installed in this manner, the steam strap 1 according to the first embodiment can accommodate fluctuations in the amount of condensed water.

[0167] Next, as Modification 1 of the first embodiment, a modification of the first space will be described with reference to Fig. 21. In describing Modification 1, the first space 11a constituting the specific space 11 will be described as an example.

[0168] Similar to the first embodiment, the first space 11a according to the first modification has an opening 11c on one side, and the opening 11c is sealed by the first detachable part 3. The first space 11a is a space defined by a plurality of walls, and these walls include an opposing wall 11a11 that faces the opening 11c, and the opposing wall 11a11 is formed between the first space 11a and the second space 11b.

[0169] The opposing wall 11a11 has a convex region 11a12 that protrudes in one of the opposing directions (Y1 direction shown in FIG. 21) facing the opening 11c. When viewed from the opposite direction (Y2 direction shown in FIG. 21), the region 11a12 is formed in a doughnut shape (with its center at one of the openings 11b1 of the second space 11b) (not shown), and is shaped so that the end 31a of the first strainer 31 fits snugly into it.

[0170] In variant example 1, when the pair of members consisting of the first strainer 31 and the first detachable part 3, or only the first strainer 31, is inserted through the opening 11c, one of the end portions 31a of the first strainer 31 fits into the region 11a12, restricting movement of the first strainer 31 in the attachment direction relative to the main body 2 (one of the opposing directions facing the opening 11c, i.e., the Y1 direction shown in Figure 21), and when the first detachable part 3 is attached to the main body 2 and seals the opening 11c, the other of the end portions 31a of the first strainer 31 abuts against the step surface 3e of the first detachable part 3; in other words, the protrusion 3c of the first detachable part 3 fits into the opening 31b of the first strainer 31, restricting movement of the first strainer 31 in the direction opposite to the attachment direction relative to the main body 2 (the Y2 direction).

[0171] That is, in Modification 1, an opposing wall 11a11 is formed between the first space 11a and the second space 11b, facing the opening 11c of the first space 11a, and the opposing wall 11a11 restricts movement of the first strainer 31, which is detachably attached to the main body 2, in the attachment direction relative to the main body 2, and the first detachable part 3 restricts movement of the first strainer 31 in the direction opposite to the attachment direction relative to the main body 2 while sealing the opening 11c of the first space 11a. This prevents the first strainer 31 from falling off. It goes without saying that similar opposing walls as the opposing wall 11a11 in the first space 11a may be formed in the other first spaces 12a, 13a.

[0172] Next, as a second modification of the first embodiment, a modification of the detachable part will be described with reference to FIGS.

[0173] The detachable part according to Modification 2 is similar to the detachable part according to the first embodiment in that it restricts the movement of one end of the strainer, but differs in that it is configured to be able to discharge condensed water present in the first space to the outside of the main body 2. In the following explanation of Modification 2, an detachable part that is detachable from the opening 11c of the first space 11a will be used as an example.

[0174] The fourth detachable part 51 according to the second modification replaces the first detachable part 3 according to the first embodiment and seals the opening 11c.

[0175] FIG. 22 is a diagram schematically illustrating a fourth detachable part 51 according to the second modification.

[0176] Similar to the first detachable part 3, the fourth detachable part 51 is configured to include a threaded shank 51b having a thread 51d formed on its outer periphery, and a protrusion 51c that is arranged coaxially with the threaded shank 51b and has a smaller outer diameter than the threaded shank 51b, and the threaded shank 51b has a flat stepped surface 51e facing one side in the axial direction between the threaded shank 51b and the protrusion 51c, and when the protrusion 51c is fitted into one of the openings of the strainer, the end of the strainer abuts against the stepped surface 51e. Below, differences from the first embodiment will be mainly described.

[0177] The fourth detachable part 51 includes an inlet 51g for taking in condensed water present in the first space 11a, a discharge outlet 51h for discharging the condensed water taken in from the inlet 51g to the outside of the main body 2, a discharge path 51j connecting the inlet 51g and the discharge outlet 51h, a valve 51k for regulating the discharge of condensed water from the inlet 51g to the discharge outlet 51h, and an operating part 51m for opening and closing the valve 51k.

[0178] Inlet 51g is rectangular and provided on a side surface of protrusion 51c. Inlet 51g is configured to be present in first space 11a when fourth detachable part 51 is attached to main body 2 and opens 11c. Condensed water present in first space 11a flows into inlet 51g.

[0179] The discharge port 51h is provided at the tip of the tube 51n. The tube 51n is formed in a hollow cylindrical shape and extends linearly in the axial direction of the threaded shaft portion 51b. The lid portion 51a, the threaded shaft portion 51b, the protrusion 51c, and the tube 51n are integrally formed, and have a cylindrical delivery path 51j therein. The delivery path 51j communicates with the inlet 51g and the discharge port 51h.

[0180] The valve 51k is disposed approximately in the center of the inside of the tubular body 51n (partway along the delivery path 51j) (FIG. 22(c)). The valve 51k is formed integrally with a pin 51p (described later) and is rotatably supported by the tubular body 51n. The tubular body 51n is provided with a through-hole (not shown) that penetrates in a direction perpendicular to the axial direction of the tubular body 51n.

[0181] The operating portion 51m is formed in the shape of a rectangular flat plate. A through-hole (not shown) is provided at one end 51m1 of the operating portion 51m, penetrating the operating portion 51m in its thickness direction. The pin 51p is inserted through the through-hole of the pipe body 51n and the through-hole of the operating portion 51m, and is formed integrally with the valve 51k. The other end 51m2 of the operating portion 51m rotates around the valve 51k (pin 51p).

[0182] Fig. 23 is a schematic diagram showing a state in which the fourth detachable part 51 according to Modification 2 is attached to the main body 2. Fig. 24 is an explanatory diagram for illustrating how the fourth detachable part 51 shown in Fig. 23 releases condensed water present in the first space 11a to the outside of the main body 2.

[0183] The operator can close the valve 51k by rotating the operating part 51m in a direction in which the other end 51m2 of the operating part 51m approaches the pipe body 51n (Figure 24(a)), and can open the valve 51k by rotating the operating part 51m in a direction in which the other end 51m2 of the operating part 51m moves away from the pipe body 51n (Figure 24(b)).

[0184] In this way, in the fourth detachable section 51 according to the second modification, an operator can open the valve 51k to discharge condensed water present in the first space 11a to the outside through the discharge port 51h, and can close the valve 51k to store condensed water in the delivery path 51j from the inlet 51g to the valve 51k, preventing the condensed water present in the first space 11a from being discharged to the outside through the discharge port 51h. This makes it possible to check, for example, the amount of condensed water introduced from the inlet 6 (piping D1) into the inside of the main body 2 (the first space 11a) (the amount of condensed water generated in the production line related to the piping D) and the amount of condensed water remaining in the first space 11a without passing through the first nozzle 21, simply by opening the valve 51k without removing the steam strap 1 from the piping D. After checking this, an optimal steam strap capable of handling the amount of condensed water generated in the production line can be installed on the piping D by, for example, changing the hole diameter of the nozzle attached to the second space 11b or the hole diameter of the nozzle attached to the other second spaces.

[0185] Next, as a third modification of the first embodiment, a modification of the steam trap will be described with reference to FIGS.

[0186] The steam trap 1 according to Modification 3 differs from the steam trap 1 according to the first embodiment in that an opening 14c is formed in the discharge space 14, and this opening 14c is sealed by the fourth detachable part 51 according to Modification 2. The following mainly describes the differences from the first embodiment.

[0187] Fig. 25 is a schematic diagram showing the steam trap 1 according to Modification 3. Fig. 26 is an explanatory diagram for explaining the discharge space 14 according to Modification 3.

[0188] The discharge space 14 according to the third modification is configured with a cylindrical space 14a extending in the X direction and a cylindrical space 14b extending in the Z direction.

[0189] The space 14b is defined by a cylindrical wall 14b1. The space 14b has an opening 14c on one side. The opening 14c is open in the Z2 direction. The opening 14c is circular when viewed from the bottom (when viewed from the Z2 direction to the Z1 direction).

[0190] The cylindrical wall 14b1 has a screw groove 14b2 on its inner circumference. The screw groove 14b2 is provided near the opening 14c and is formed in a spiral shape along the inner circumference of the cylindrical wall 14b1. The screw groove 14b2 is threadedly engaged with the screw thread 51d of the fourth detachable part 51. The opening 14c is sealed by the fourth detachable part 41 as the screw groove 14b2 is threadedly engaged with the screw thread 51d. Note that detailed illustration of the screw groove 14b2 is omitted in FIG. 26.

[0191] In the steam trap 1 of variant example 3, the opening 14c of the discharge space 14 is sealed with the fourth detachable part 51 of variant example 2, and an operator can open the valve 51k of the fourth detachable part 51 to discharge the condensed water in the discharge space 14 to the outside through the discharge port 51h, and by closing the valve 51k, the condensed water can be stored in the discharge path 51j from the inlet 51g to the valve 51k, and the condensed water in the discharge space 14 can be discharged to the outside (piping D2) through the discharge port 7.

[0192] In this way, in the steam trap 1 according to the third modification, the amount of condensed water discharged from the discharge space 14 to the pipe D2 can be confirmed by simply opening the valve 51k of the fourth detachable part 51 without removing the steam trap 1 from the pipe D.

[0193] Furthermore, in the steam trap 1 according to variant example 3, it is possible to check whether steam is leaking into the discharge space 14, i.e., whether steam is leaking outside the steam trap 1, simply by opening the valve 51k of the fourth detachable part 51, without removing the steam trap 1 from the piping D.

[0194] As a fourth modification of the steam strap 1 according to the first embodiment, a configuration may be adopted in which the second and third modifications are combined, i.e., two fourth detachable portions 51 are provided, and opening 11c is sealed with one of the fourth detachable portions 51, and opening 14c is sealed with the other fourth detachable portion 51.

[0195] When configured as in the above variant example 4, the amount of condensed water introduced from the inlet 6 (piping D1) into the inside of the main body 2 (first space 11a) can be confirmed by opening the valve 51k of the fourth detachable part 51 that seals the opening 11c without removing the steam trap 1 from the piping D, and the amount of condensed water discharged from the outlet 7 (discharge space 14) to the outside of the main body 2 (piping D2) can be confirmed by opening the valve 51k of the fourth detachable part 51 that seals the opening 14c, so that an optimal steam trap that can accommodate the amount of condensed water generated can be provided.

[0196] In addition, in the fourth variant, as in the first embodiment, by removing each of the detachable parts 51, 4, 5, the openings 11c, 12c, 13c of each of the first spaces 11, 12, 13 can be opened, and it goes without saying that the nozzles attached to each of the second spaces 11b, 12b, 13b and the strainers attached to each of the first spaces 11a, 12a, 13a can be easily replaced through these openings.

[0197] As described above, the steam strap 1 according to the first embodiment has a plurality of specific spaces through which condensed water passes in sequence, and each of these specific spaces includes a second space that holds a nozzle. By setting the hole diameter of each nozzle to a relatively large value of 0.75 mm, the processing capacity of the steam strap (the ability to introduce condensed water generated on the production line into the steam strap so that it does not accumulate in the piping, and the ability to discharge the condensed water introduced into the steam strap to the outside) is ensured and damage to the steam trap due to foreign matter entering the pores of each nozzle is prevented. At the same time, the amount of condensed water passing through (the amount of movement) is reduced each time the condensed water passes through each nozzle, and steam leakage from the main body (the outlet) can be prevented. However, this configuration is not limited to this, and as a variant example 5 of the first embodiment, by taking into consideration the amount of condensed water and steam introduced from the inlet 6, the amount of condensed water passing through the pores 21c of the first nozzle 21 (amount moving from the first space 11 to the first space 12), the amount of condensed water passing through the pores of the second nozzle 22 (amount moving from the first space 12 to the first space 13), and the amount of condensed water passing through the pores of the third nozzle 23 (amount moving from the first space 13 to the discharge space 14), it is also possible to install nozzles with different hole diameters in each second space, or to install two nozzles with the same diameter and one with a different diameter in each second space.

[0198] As an example of the fifth modification, although not shown, the hole diameters of the nozzles may be gradually reduced, such as hole diameter of first nozzle 21 (e.g., 0.75 mm) > hole diameter of second nozzle 22 (e.g., 0.6 mm) > hole diameter of third nozzle 23 (e.g., 0.6 mm or 0.45 mm). In this way, since the hole diameter of first nozzle 21 is relatively large, the amount of condensed water moving from first space 11 a to first space 12 a (the amount of condensed water passing through first nozzle 21) is not reduced, and condensed water introduced from pipe D1 (indirect condensed water generated upstream of pipe D) can be received inside main body 2. Meanwhile, by making the hole diameters of second nozzle 22 and third nozzle 23 relatively small, the amount of steam passing through both nozzles 22 and 23 can be reliably reduced.

[0199] Next, a steam strap according to a second embodiment will be described with reference to FIGS.

[0200] The steam strap according to the second embodiment is similar to the steam strap according to the first embodiment in that it is configured to detachably hold the first nozzle 21 in the second space 11b and the third nozzle 23 in the second space 13b, but differs in that it is configured to detachably hold a group of plate materials in the second space 12b. The following mainly describes the differences from the first embodiment.

[0201] The steam strap according to the second embodiment is configured to detachably hold the plate group 70 in the second space 12b via a housing portion 61 that can house the plate group 70.

[0202] FIG. 27 is an explanatory diagram for explaining a state in which the accommodation portion 61 is attached to the second space 12b according to the second embodiment.

[0203] The second space 12b according to the second embodiment has the same configuration as the second space 12b according to the first embodiment, and therefore a detailed description thereof will be omitted. However, the second space 12b is a space defined by a cylindrical wall 12b3, and the cylindrical wall 12b3 has a thread groove 12b4 (not shown in Figure 27; see Figure 8) on its inner surface, and this thread groove 12b4 threads into the threads of the accommodating portion 61, thereby attaching the accommodating portion 61 to the second space 12b.

[0204] Figure 28 is a diagram showing the storage section 61. Figure 28(c) is a cross-sectional view of the storage section 61 taken along line FF in Figure 28(b).

[0205] The accommodation portion 61 is configured to be able to accommodate the plate group 70, and is formed mainly from a metal material. The accommodation portion 61 includes a head portion 61a, a leg portion 61b, and a narrow hole 61c.

[0206] The head portion 61a is formed in a hexagonal shape in a plan view (FIG. 28(b)). The head portion 61a is formed to have dimensions that allow it to fit snugly into the first hole 41a of the jig 40.

[0207] The leg portion 61b is integral with the head portion 61a and is formed in a hollow cylindrical shape (FIG. 28(c)). The leg portion 61b has a screw thread 61d and a groove 61e.

[0208] The screw thread 61d is formed in a spiral shape along the outer periphery of the leg portion 61b. The screw thread 61d is threadedly engaged with the screw groove 12b4 of the second space 12b described above. The housing portion 61 is attached to the second space 12b by the screw thread 61d being threadedly engaged with the screw groove 12b4. Note that detailed illustration of the screw thread 61d is omitted in Figure 28.

[0209] Groove 61e is formed spirally along the inner periphery of leg portion 61b. Groove 61e is screwed into plate group 70. Plate group 70 is attached (housed) inside housing portion 61 (inside leg portion 61b) by screwing into groove 61e. Note that detailed illustration of groove 61e is omitted in Figure 28.

[0210] The fine hole 61c is a through hole. The fine hole 61c extends linearly along the axial direction of the leg portion 61b from the center of the upper surface of the head portion 61a to the center of the lower surface of the head portion 61a. The fine hole 61c has a diameter of 0.75 mm. Condensed water introduced into the first space 12a passes through the fine hole 61c, and then passes through the fine hole 61c and holes provided in the plate group 70, thereby moving from the first space 12a to the first space 13a (described in detail below).

[0211] FIG. 29 is a schematic diagram showing the plate group 70. As shown in FIG.

[0212] The plate group 70 includes a first plate 71, a second plate 72, and a third plate 73. For ease of explanation, in Fig. 29, the third plate 73 is colored black.

[0213] The first plate material 71 is formed in a circular shape when viewed in the thickness direction (FIG. 29(a)). The diameter of the first plate material 71 is set to 20 mm. The thickness of the first plate material 71 is set to 1.5 mm. The first plate material 71 has a first hole 71a. The first hole 71a penetrates in the thickness direction. The diameter of the first hole 71a is set to 0.6 mm.

[0214] The second plate material 72 is formed in a circular shape when viewed in the thickness direction (FIG. 29(b)). The diameter of the second plate material 72 is set to 20 mm. The thickness of the second plate material 72 is set to 1.5 mm. The second plate material 72 has a second hole 72a. The second hole 72a penetrates in the thickness direction. The diameter of the second hole 72a is set to 0.6 mm.

[0215] The third plate material 73 is formed in a circular (ring-like) shape when viewed in the thickness direction (FIG. 29(c)). The diameter of the third plate material 73 is set to 20 mm. The thickness of the third plate material 73 is set to 3 mm. The third plate material 73 has a third hole 73a. The third hole 73a penetrates in the thickness direction. The diameter of the third hole 73a is set to 15 mm.

[0216] Although not shown in the drawings, an operator can attach each of the plate materials 71 to 73 to the inside of the storage section 61 (inside the leg portion 61b) by screwing each of the plate materials 71 to 73 into the groove 61e of the storage section 61.

[0217] FIG. 29(d) is an explanatory diagram for explaining a state in which the plate material group 70 is accommodated in the accommodation section 61. As shown in FIG.

[0218] 29(d), each of the plate materials 71 to 73 is accommodated inside the accommodation section 61 so that the thickness direction of each plate material 71 to 73 coincides with the axial direction of the accommodation section 61 (leg portion 61b). When each of the plate materials 71 to 73 is accommodated inside the accommodation section 61, the first plate material 71 and the second plate material 72 are arranged at positions spaced apart from each other, the third plate material 73 is positioned between the first plate material 71 and the second plate material 72 and adjacent to both plate materials, the first hole 71a and the third hole 73a overlap in the thickness direction, and the third hole 73a and the second hole 72a overlap in the thickness direction, but the first hole 71a and the second hole 72a do not overlap in the thickness direction.

[0219] In the state shown in Figure 29(d), two first plate materials 71, one second plate material 72, and two third plate materials 73 are accommodated in the storage section 61, and these five plate materials are arranged so as to be in contact with the plate materials in front and behind them.The thickness of the first plate material 71 is 1.5 mm, the thickness of the second plate material 72 is 1.5 mm, and the thickness of the third plate material 73 is 3 mm, so the longitudinal dimension of this group of plate materials 70 (axial direction of the storage section 61) is 10.5 mm (1.5 mm + 3 mm + 1.5 mm + 3 mm + 1.5 mm).

[0220] FIG. 30 is an explanatory diagram for explaining a state in which the accommodation portion 61 is attached to the second space 12b, that is, a state in which the plate group 70 is held in the second space 12b via the accommodation portion 61.

[0221] As shown in Figure 30, the group of plate materials 70 is held in the second space 12b in the following order from the side of the pore 61c of the storage section 61 (one opening of the second space 12b) toward the other opening of the second space 12b (from the X2 direction toward the X1 direction shown in the same figure): the first plate material 71 at the front (first), the third plate material 73 at the second, the second plate material 72 at the third, the third plate material 73 at the fourth, and the first plate material 71 at the fifth (rear).

[0222] When the plate group 70 is held in the second space 12b via the storage section 61, the first hole 71a and the third hole 73a overlap when the leading first plate 71 and the second third plate 73 are viewed in the thickness direction. Furthermore, when the second third plate 73 and the third second plate 72 are viewed in the thickness direction, the third hole 73a and the second hole 72a overlap. Furthermore, when the third second plate 72 and the fourth third plate 73 are viewed in the thickness direction, the second hole 72a and the third hole 73a overlap. Furthermore, when the fourth third plate 73 and the trailing first plate 71 are viewed in the thickness direction, the third hole 73a and the first hole 71a overlap. On the other hand, when the leading first plate material 71 and the third second plate material 72 are viewed from the thickness direction, the first hole 71a and the second hole 72a do not overlap when viewed from the thickness direction, and similarly, when the third second plate material 72 and the trailing first plate material 71 are viewed from the thickness direction, the second hole 72a and the first hole 71a do not overlap when viewed from the thickness direction.

[0223] The method of attaching the housing portion 61 will be described with reference to the drawings. First, the worker inserts the housing portion 61 into the second hole 42a of the jig 40 (see FIGS. 13 and 29). At this time, the housing portion 61 is inserted into the second hole 42a so that the leg portion 61b of the housing portion 61 is exposed from the second hole 42a. Next, the worker holds the handle portion 44 so that the second hole 42a of the jig 40 faces the opening 12c of the main body 2, and inserts the second pipe body 45 of the jig 40 into the first space 12a through the opening 12c (see FIG. 8). Next, the worker brings the leg 61b of the housing 61 close to the second space 12b. When the leg 61b reaches the thread groove 12b4 of the second space 12b, the worker rotates the jig 40 in a predetermined direction around the axis of the jig 40 to thread the thread 61e of the leg 61b into the thread groove 12b4 of the second space 12b. At this time, the worker loosely fastens (temporarily fastens) the housing 61 in the second space 12b. Next, the worker removes the second tubular body 45 from the opening 12c to the outside, and then repositions the jig 40 so that the first hole 41a faces the opening 12c of the main body 2. The worker then inserts the first tubular body 43 into the first space 12a through the opening 12c, bringing the first hole 41a close to the second space 12b. Finally, when the worker reaches the housing 61 whose first hole 41a has been temporarily fastened in the second space 12b, he or she inserts the head 61a of the housing 61 into the first hole 41a and then rotates the jig 40 in a predetermined direction about the axis of the jig 40 to firmly fasten the thread 61e into the thread groove 12b4. This attaches the housing 61 to the second space 12b (FIG. 30). Note that the method for removing the housing 61 from the second space 12b is similar to the method for removing the nozzle from the second space, and therefore its description and illustration will be omitted.

[0224] FIG. 31 is an explanatory diagram for explaining the flow path of the condensed water formed in the second space 12b.

[0225] As shown in Figure 31, when two third plate members 73 are arranged in the second space 12b so as to be adjacent to each other between the first plate member 71 and the second plate member 72, a flow path 81 for condensed water is formed in the second space 12b.

[0226] The flow path 81 is formed unevenly in the axial direction of the second space 12b, and communicates with the other opening (opening 12b2) of the second space 12b from the pore 61c. The flow path 81 includes a narrow space 82, a narrow space 83, and a narrow space 84.

[0227] The narrow space 82 is a space defined by the storage section 61 and the leading first plate member 71. The narrow space 83 is a space defined by the leading first plate member 71, the second third plate member 73, and the third second plate member 72. The narrow space 84 is a space defined by the third second plate member 72, the fourth third plate member 73, and the trailing first plate member 71.

[0228] As shown in Figure 31, condensed water introduced from the first space 12a (opening 12b1 of the second space 12b) first passes through the pores 61c of the storage section 61 and moves into the narrow space 82, then passes through the first hole 71a and moves into the narrow space 83, then passes through the second hole 72a and moves into the narrow space 84, and finally passes through the first hole 71a and moves into the opening 12b2 of the second space 12b, and then moves into the first space 13a (specific space 13).

[0229] The steam strap according to the second embodiment is configured to be able to hold a group of plate materials 70 in the second space 12b via the accommodation section 61, and the accommodation section 61 and the group of plate materials 70 form an uneven flow path 81 in the second space 12b, and the condensed water passing through the flow path 81 collides with the leading first plate material 71 after passing through the fine hole 61c, then collides slightly with the third second plate material 72 after passing through the fine hole 71a, and then collides with the trailing first plate material 71 after passing through the fine hole 72a, thereby reducing its pressure.

[0230] Comparing the second embodiment (where the storage section 61 is attached to the second space 12b) with the first embodiment (where the second nozzle 22 is attached to the second space 12b), the former makes it possible to form a complex flow path inside the main body, thereby enhancing the pressure reduction effect and reducing the amount of condensed water passing through the second space 12b per unit time.

[0231] In the second embodiment, the second detachable part 4 that seals the opening 12c is removed to open the opening 12c, and the storage part 61 can be attached to the second space 12b through this opening 12c, making it easy to attach and detach the storage part 61.

[0232] In the second embodiment, the plate group 70 can be attached and detached to the second space 12b via the storage section 61, and an operator can store the plate materials in the storage section 61 by screwing each plate material into the groove 61e of the storage section 61, making it easy to replace the plate materials.

[0233] In the second embodiment, two first plate members 71, two third plate members 73, and one second plate member 72 are combined to form a plate group 70, and this plate group 70 is stored in the storage section 61 to create a relatively complex path 81 in the second space 12b. Therefore, the shape of the path 81 created in the second space 12b can be easily changed by changing the number of plate members stored in the storage section 61, such as by combining one first plate member 71, one third plate member 73, and one second plate member 72 to form a plate group 70 and storing it in the storage section 61. This makes it possible to provide a highly versatile steam strap that can flexibly respond to the amount of condensed water generated.

[0234] In the second embodiment, the multiple plate materials stored in the storage section 61 are arranged so that they are in contact with the plate materials in front and behind them when stored in the storage section 61, which makes it possible to prevent damage to the plate materials due to the pressure of condensed water compared to when the plate materials are arranged so that they are not in contact with the plate materials in front and behind them.

[0235] In the second embodiment, as in the first embodiment, the first detachable part 3 that seals the opening 11a is removed to open the opening 11c, and the third detachable part 5 that seals the opening 13a is removed to open the opening 13c, thereby enabling the first nozzle 21 to be attached to the second space 11b and the third nozzle 23 to be attached to the second space 13b, respectively. Therefore, it goes without saying that the hole diameter of the nozzle attached to the second space 11b and the hole diameter of the nozzle attached to the second space 13b can be easily changed.

[0236] In the second embodiment, the multiple plate materials have through holes penetrating in the thickness direction, and these through holes are formed to extend linearly in the axial direction of the second space 12b (the flow direction of the condensed water), but this configuration is not limited to this, and as a variant example 1 of the second embodiment, the through holes of the plate materials may be formed to extend linearly in a direction intersecting the axial direction of the second space 12b.

[0237] FIG. 32 is an explanatory diagram for explaining a flow path of condensed water formed in the second space 12b according to the first modification of the second embodiment.

[0238] The steam trap according to the first modified example of the second embodiment includes a main body 2 having a condensate flow path 8 therein, and a plurality of detachable parts 3 to 5 that are detachably attached to the main body 2. The flow path 8 is formed with a plurality of specific spaces 11 to 13. Each of the plurality of specific spaces 11 to 13 includes first spaces 11a, 12a, and 13a that are open to the outside on one side, and second spaces 11b, 12b, and 13b that are formed opposite the openings of the first spaces and are connected to the openings of the first spaces via the first spaces. The openings of the first spaces 11a to 13a are sealed by the detachable parts 3 to 5. The plurality of second spaces 11b to 13b include second spaces 11b and 13b that detachably hold nozzles, and a second space 12b that detachably hold a plurality of plate materials 91 to 93 in a thickness direction of the plate materials. The plurality of plate materials 91 to 93 include The plate member 91 includes a first plate member 91 having a first hole 91a, a second plate member 92 having a second hole 92a, and a third plate member 93 having a third hole 93a, which is held in the second space 12b so as to be adjacent to the first plate member 91 and the second plate member 92. The first hole 91a, the second hole 92a, and the third hole 93a are all through holes formed to extend linearly in a direction intersecting the axial direction of the second space 12b. The diameter of the third hole 93a is set larger than the diameters of the first hole 91a and the second hole 92a. When the plurality of plate members 91 to 93 are held in the second space 12b, the first hole 91a and the third hole 93a overlap in the thickness direction, and the third hole 93a and the second hole 92a overlap in the thickness direction, while the first hole 91a and the second hole 92a do not overlap in the thickness direction.

[0239] As shown in FIG. 32, in the steam trap according to the first variant of the second embodiment, the holes 91a, 92a, 93a extend linearly in a direction intersecting the axial direction of the second space 12b. Therefore, compared to a configuration in which the holes extend linearly in the axial direction of the second space 12b, the flow path of condensed water from, for example, the first hole 91a to the second plate material 92 is longer, and damage to the plate materials due to the pressure of the condensed water can be prevented.

[0240] In the second embodiment, the diameters of the first hole 71a and the second hole 72a are set to 0.6 mm, and the diameter of the third hole 73a is set to 15 mm. However, this configuration is not limited thereto. It is also possible to set the diameter of the third hole 73a to be larger than the diameters of the first hole 71a and the second hole 72a, and to configure the plate group 70 so that, when the plate members 71 to 73 are attached to the second space 12b, the first hole 71a and the third hole 73a overlap, and the third hole 73a and the second hole 72a overlap, but the first hole 71a and the second hole 72a do not overlap. Even with this configuration, an uneven flow path 81 that reduces the pressure of condensed water can be formed in the second space 12b.

[0241] In the second embodiment, the thickness of the first plate material 71 is set to 1.5 mm, the thickness of the second plate material 72 is set to 1.5 mm, and the thickness of the third plate material 73 is set to 3 mm, but this configuration is not limited to this, and as a second variant of the second embodiment, the thickness of the third plate material 73 may be changed to 2 mm or 4 mm.

[0242] When configured as in Modification 2 of the second embodiment, the narrow space formed in the flow path 81 can be reduced by changing the thickness of the third plate member 73 to, for example, 2 mm, and the narrow space formed in the flow path 81 can be increased by changing the thickness of the third plate member 73 to 4 mm. This makes it possible to increase or decrease the effect of reducing the pressure of condensed water passing through the flow path 81.

[0243] As an example of variant example 2 of the second embodiment, multiple types of third plate material 73 with different thickness dimensions are prepared in advance, and the third plate material 73 stored in the storage section 61 (the third plate material 73 attached to the second space) can be changed depending on the amount of condensed water generated on the production line, thereby making it possible to flexibly respond to the amount of condensed water generated on the production line.

[0244] In addition, in variant example 2 of the second embodiment, the first plate material 71 and the second plate material 72, unlike the third plate material 73, have 0.6 mm pores, and since condensed water passes through these pores intermittently, changing the thickness of the first plate material 71 and the second plate material 72 could lead to damage to the pores due to condensed water, so it is recommended to maintain the thickness of the first plate material 71 and the second plate material 72 at 1.5 mm.

[0245] In the second embodiment, a flow path 81 is formed in the second space 12b by making it possible to removably attach multiple plate materials 71 to 73 to the second space 12b via the storage section 61, but this configuration is not limited to this, and it is also possible to have a configuration in which multiple plate materials are removably attached to the second space by another means without using the storage section 61.

[0246] In the second embodiment, the multiple second spaces 11b to 13b are configured to include second spaces 11b and 13b that detachably hold nozzles and second space 12b that detachably hold plate group 70, but this configuration is not limited thereto, and any one of the second spaces may be configured to detachably hold plate group 70. For example, the second spaces 11a and 13a may be configured to detachably hold nozzles, and second space 13b may be configured to detachably hold plate group 70, or the second space 11b may be configured to detachably hold nozzles, and second spaces 12b and 13b may be configured to detachably hold plate group 70, or all of the second spaces 11b to 13b may be configured to detachably hold plate group 70. In this configuration, by adjusting the hole diameter of the nozzle removably held in the second space and the configuration of the plate group removably held in the second space (the number of plate groups and the thickness of the third plate 73) so that the amount of condensed water passing through the second space 11b is greater than the amount of condensed water passing through the second space 12b ≥ the amount of condensed water passing through the second space 13b, it is possible to accept more condensed water introduced from the pipe D1.

[0247] Furthermore, in the second embodiment, the plurality of second spaces 11b to 13b are configured to include a second space that detachably holds a nozzle and a second space that detachably holds an accommodation portion 61 that can house the plate group 70. However, the present invention is not limited to this configuration, and all of the second spaces 11b to 13b may be configured to detachably hold both the nozzle and the accommodation portion 61, or some of the second spaces 11b to 13b may be configured to detachably hold both the nozzle and the accommodation portion 61. In this way, it becomes possible to easily change the amount of condensed water that can be introduced from the inlet 6 (piping D1) and the amount of condensed water that can be discharged from the outlet 7, thereby providing a highly versatile steam strap. [Explanation of symbols]

[0248] 1 steam trap 2 Main unit 3, 4, 5, 51 Detachable part 8 Flow path 11, 12, 13 Specific space 11a, 12a, 13a 1st space 11b, 12b, 13b 2nd space 11c, 12c, 13c Opening of the first space 21, 22, 23 nozzles 31, 32, 33 Strainer 71, 91 1st plate material 72, 92 2nd plate material 73, 93 3rd plate material

Claims

1. A steam trap comprising: The device comprises a main body having a condensed water flow path therein, and a plurality of detachable parts that are detachable from the main body, A plurality of specific spaces are formed in the flow path, Each of the plurality of specific spaces includes a first space having one side open to the outside, and a second space formed at a position opposite to the opening of the first space and connected to the opening of the first space via the first space, Each of the second spaces is configured to detachably hold a nozzle, The openings of the first spaces are sealed by the detachable portions. A steam trap characterized by:

2. The second space includes a nozzle holder that holds the nozzle such that the nozzle axis extends in a first direction, and a nozzle holder that holds the nozzle such that the nozzle axis extends in a second direction different from the first direction.

2. The steam trap according to claim 1 .

3. an opposing wall facing the opening of the first space is formed between the first space and the second space; The opposing wall restricts movement of the strainer, which is detachably attached inside the main body, in an attachment direction relative to the main body, The detachable portion restricts movement of the strainer in a direction opposite to a direction in which the strainer is attached to the main body.

2. The steam trap according to claim 1 .

4. The plurality of detachable parts include one including an inlet for taking in condensed water present in the first space, a discharge port for discharging the condensed water taken in from the inlet to the outside of the main body, a discharge path for discharging the condensed water from the inlet to the discharge port, a valve provided in the discharge path for regulating the discharge of condensed water from the inlet to the discharge port, and an operating part for opening and closing the valve.

2. The steam trap according to claim 1 .

5. the flow path extends from an inlet for introducing condensed water into the inside of the body to an outlet for discharging condensed water to the outside of the body; a discharge space having the discharge port is formed in the flow path, The discharge space has an opening on one side different from the discharge port, The plurality of detachable parts include a part that seals an opening of the discharge space and includes an inlet for taking in condensed water present in the discharge space, a discharge port for discharging the condensed water taken in from the inlet to the outside of the main body, a delivery path for sending the condensed water from the inlet to the discharge port, a valve that is provided in the delivery path and restricts the delivery of condensed water from the inlet to the discharge port, and an operating part that opens and closes the valve.

2. The steam trap according to claim 1 .

6. A steam trap comprising: The device comprises a main body having a condensed water flow path therein, and a plurality of detachable parts that are detachable from the main body, A plurality of specific spaces are formed in the flow path, Each of the plurality of specific spaces includes a first space having one side open to the outside, and a second space formed at a position opposite to the opening of the first space and connected to the opening of the first space via the first space, the openings of the first spaces are sealed by the detachable portions, the second space includes a structure for detachably holding a nozzle and a structure for detachably holding a plurality of plate materials in a thickness direction of the plurality of plate materials, the plurality of plate materials are comprised of a first plate material having a first hole, a second plate material having a second hole, and a third plate material having a third hole, which is held in the second space so as to be adjacent between the first plate material and the second plate material, the first hole, the second hole, and the third hole all penetrate in the thickness direction, a diameter of the third hole is set to be larger than diameters of the first hole and the second hole; When the plurality of plate materials are held in the second space, the first hole and the third hole overlap in the thickness direction, and the third hole and the second hole overlap in the thickness direction, while the first hole and the second hole do not overlap in the thickness direction. A steam trap characterized by:

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