Steam trap

Abstract

The steam trap is used for being installed on a steam pipeline, the steam trap comprises a steam trap body and a drainage mechanism, the steam trap body is installed at the bottom of the steam pipeline and forms a cavity communicating with the steam pipeline, and a drainage opening is formed in the bottom wall of the cavity; the drainage mechanism is arranged in the cavity and comprises a movable part, a supporting part and a blocking part, the supporting part is vertically installed on the bottom wall of the cavity, the movable part is rotationally connected to the supporting part, a first connecting point of the movable part and the supporting part is arranged between the two ends of the movable part, and the blocking part is connected to the end of the movable part and used for blocking the drainage opening; the supporting piece can expand with heat and contract with cold in the vertical direction so that the movable piece can rotate around the first connecting point and drive the blocking piece to open or block the water outlet. By means of the technical scheme, the steam trap can automatically discharge and drain water, steam is prevented from escaping and leaking, and the steam utilization rate can be increased.

Description

Technical Field

[0001] The present disclosure relates to the technical field of drainage devices, and more particularly, to a steam trap. Background Art

[0002] A steam trap, also known as a steam trap valve or an automatic drainer or condensate discharger, is installed in a steam pipeline. Its function is to continuously discharge the condensate in the steam pipeline to the outside of the pipeline. In related technologies, steam will escape and leak when the steam trap drains water, reducing the steam utilization rate. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide a steam trap that can avoid steam escape and leakage, which is beneficial to improving the steam utilization rate.

[0004] To achieve the above purpose, the present disclosure provides a steam trap for installation in a steam pipeline. The steam trap includes a trap body and a drainage mechanism. The trap body is installed at the bottom of the steam pipeline and forms a cavity communicating with the steam pipeline. A drain port is provided on the bottom wall of the cavity. The drainage mechanism is disposed in the cavity and includes a movable member, a support member, and a plugging member. The support member is vertically installed on the bottom wall of the cavity. The movable member is rotatably connected to the support member, and the first connection point between the movable member and the support member is arranged between the two ends of the movable member. The plugging member is connected to the end of the movable member and is used to plug the drain port. The support member is configured to expand and contract thermally in the vertical direction, so that the movable member rotates around the first connection point and drives the plugging member to open or plug the drain port.

[0005] Optionally, the drainage mechanism further includes a vertical rod, which is fixed to the bottom wall of the cavity and extends in the vertical direction. The movable member is rotatably connected to the vertical rod, and the second connection point between the movable member and the vertical rod is arranged between the first connection point and the plugging member.

[0006] Optionally, the vertical rod is configured to expand and contract thermally in the vertical direction, and the coefficient of thermal expansion of the vertical rod is less than that of the support member.

[0007] Optionally, the movable member is hingedly connected to the vertical rod through a first hinge.

[0008] Optionally, the support member is hingedly connected to the movable member through a second hinge.

[0009] Optionally, the plugging member is hingedly connected to the movable member through a third hinge.

[0010] Optionally, the plugging member includes a connecting rod and a plugging head. The connecting rod is hinged to the movable member through the third hinge. The plugging head is connected to the connecting rod and is configured to be conical. The diameter of the plugging head gradually decreases from the connecting rod towards the direction away from the connecting rod.

[0011] Optionally, a first flange is provided at the top end of the steam trap body, and a second flange is provided at the bottom of the steam pipe. The first flange and the second flange are detachably connected.

[0012] Optionally, a filter screen is provided in the cavity, and the filter screen is arranged below the connection between the steam trap body and the steam pipe.

[0013] Optionally, the steam trap includes a blowdown valve, and the blowdown valve is installed on the bottom wall of the cavity.

[0014] Through the above technical solution, in the steam trap provided by the present disclosure, a drainage mechanism is provided in the cavity. The drainage mechanism includes a movable member, a plugging member and a supporting member. The movable member is rotatably connected to the supporting member. The plugging member is connected to the end of the movable member and is used to plug the drainage port. Since the supporting member can expand and contract thermally in the vertical direction, when condensed water flows into the cavity, the supporting member cools and contracts, causing the movable member to rotate around the first connection point and drive the plugging member to move upward, opening the drainage port and discharging the condensed water from the drainage port. When steam is introduced into the cavity, the supporting member expands due to heat, causing the movable member to rotate around the first connection point and drive the plugging member to move downward, closing the drainage port. In this way, through the cooperation of the movable member, the plugging member and the supporting member, automatic cyclic drainage is realized. In addition, after the cooling water in the cavity is emptied, since the temperature in the cavity will rise rapidly, the supporting member will expand rapidly due to heat and drive the plugging member to close the drainage port in time, thus avoiding steam leakage and improving steam utilization rate.

[0015] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the steam trap provided by the exemplary embodiment of the present disclosure when the drainage port is in an open state;

[0018] Figure 2 is a schematic structural diagram of the steam trap provided by the exemplary embodiment of the present disclosure when the drainage port is in a closed state.

[0019] Description of the Reference Numerals

[0020] 100 - Steam pipeline; 1 - Cavity; 11 - Drain outlet; 12 - Threaded hole; 2 - Drainage mechanism; 21 - Movable part; 22 - Support part; 23 - Vertical rod; 24 - First hinge; 25 - Second hinge; 3 - Plugging part; 31 - Third hinge; 32 - Connecting rod; 33 - Plugging head; 4 - First flange; 5 - Second flange; 6 - Filter screen; 61 - Threaded part; 7 - Drainage pipeline; 8 - Drain valve. Specific embodiments

[0021] The following will describe the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present disclosure, and are not intended to limit the present disclosure.

[0022] In the present disclosure, unless otherwise stated, the orientation terms such as "top" and "bottom" refer to the "top" and "bottom" relative to the contour of the corresponding component itself. In addition, the terms "first", "second", "third", etc. used in the present disclosure are used to distinguish one element from another element, and do not have sequence and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only for the purpose of explaining and illustrating the present disclosure, and should not be construed as a limitation of the present disclosure.

[0023] The present disclosure provides a steam trap for installation on a steam pipeline 100. Refer to Figure 1 and Figure 2 as shown, the steam trap includes a trap body and a drainage mechanism 2. The trap body is installed at the bottom of the steam pipeline 100 and forms a cavity 1 communicating with the steam pipeline 100. A drain outlet 11 is provided on the bottom wall of the cavity 1. The drainage mechanism 2 is arranged in the cavity 1 and includes a movable part 21, a support part 22 and a plugging part 3. The support part 22 is vertically installed on the bottom wall of the cavity 1. The movable part 21 is rotatably connected to the support part 22, and the first connection point between the movable part 21 and the support part 22 is arranged between the two ends of the movable part 21. The plugging part 3 is connected to the end of the movable part 21 and is used to plug the drain outlet 11. The support part 22 is configured to: be able to expand and contract in the vertical direction, so that the movable part 21 rotates around the first connection point and drives the plugging part 3 to open or plug the drain outlet 11.

[0024] Through the above technical solution, in the steam trap provided by the present disclosure, a drainage mechanism 2 is arranged in the cavity 1. The drainage mechanism 2 includes a movable member 21, a plugging member 3, and a support member 22. The movable member 21 is rotatably connected to the support member 22. The plugging member 3 is connected to the end of the movable member 21 and is used to plug the drain port 11. Since the support member 22 can thermally expand and contract in the vertical direction, when condensed water flows into the cavity 1, the support member 22 cools and contracts, causing the movable member 21 to rotate around the first connection point and drive the plugging member 3 to move upward, opening the drain port 11 and discharging the condensed water from the drain port 11. When steam is introduced into the cavity 1, the support member 22 expands due to heat, causing the movable member 21 to rotate around the first connection point and drive the plugging member 3 to move downward, closing the drain port 11. In this way, through the cooperation of the movable member 21, the plugging member 3, and the support member 22, automatic cyclic drainage is achieved. In addition, after the cooling water in the cavity 1 is emptied, since the temperature in the cavity 1 will rise rapidly, the support member 22 will rapidly expand due to heat and drive the plugging member 3 to close the drain port 11 in time, thus avoiding steam leakage and improving steam utilization efficiency.

[0025] In the present disclosure, a drain pipe 7 can be vertically installed at the drain port 11 to facilitate docking with the pipes in the drainage system for discharging the cooling water.

[0026] In the exemplary embodiment provided by the present disclosure, as shown in Figure 1 and Figure 2 The drainage mechanism 2 may further include a vertical rod 23. The vertical rod 23 is fixed to the bottom wall of the cavity 1 and extends in the vertical direction. The movable member 21 is rotatably connected to the vertical rod 23, and the second connection point between the movable member 21 and the vertical rod 23 is arranged between the first connection point and the plugging member 3. By such an arrangement, the second connection point can serve as a fulcrum, and the vertical rod 23, the movable member 21, the support member 22, and the plugging member 3 form a lever structure. When the support member 22 thermally expands and contracts in the vertical direction, the movable member 21 rotates around the second connection point and drives the plugging member 3 to open or plug the drain port 11. The structure is stable and reliable, and the drainage sensitivity is improved.

[0027] In the exemplary embodiment provided by the present disclosure, as shown in Figure 1As shown, the vertical rod 23 can be configured to expand and contract thermally in the vertical direction, and the coefficient of thermal expansion of the vertical rod 23 is less than that of the support member 22. Among them, the support member 22 can be made of aluminum or an expansion alloy, and the vertical rod 23 can be made of ordinary glass or silicon dioxide. Of course, the support member 22 can also be made of other materials with a high coefficient of thermal expansion. Similarly, the vertical rod 23 can be made of other materials with a low coefficient of thermal expansion, as long as the above-mentioned usage requirements are met. The present disclosure does not make specific limitations in this regard. Through the above settings, when steam is introduced into the cavity 1 and the temperature in the cavity 1 rises, the support member 22 will expand earlier than the vertical rod 23 to drive the movable member 21 to rotate around the second connection point. The rotation of the movable member 21 drives the blocking member 3 to close the drain port 11. Similarly, when condensed water flows into the cavity 1 and the temperature in the cavity 1 drops, the support member 22 will contract earlier than the vertical rod 23 to drive the movable member 21 to rotate around the second connection point. The rotation of the movable member 21 drives the blocking member 3 to open the drain port 11.

[0028] To further improve the drainage efficiency of the drainage mechanism 2, the movable member 21 can be set as a hollow rod-shaped structure. In this way, when the support member 22 expands and contracts thermally, it is beneficial for the support member 22 to quickly drive the movable member 21 to act, so as to open or close the drain port 11 in a timely manner, with high sensitivity.

[0029] In the exemplary embodiment provided by the present disclosure, referring to Figure 1 and Figure 2 As shown, the movable member 21 can be hingedly connected to the vertical rod 23 through the first hinge 24. By setting it in this way, the movable member 21 only rotates relative to the vertical rod 23 and will not have a position offset, improving the stability of the movable member 21, which is beneficial to improving the matching accuracy between the blocking member 3 and the drain port 11.

[0030] In the exemplary embodiment provided by the present disclosure, referring to Figure 1 As shown, the support member 22 can be hingedly connected to the movable member 21 through the second hinge 25. By setting it in this way, the reliability of the connection between the movable member 21 and the support member 22 is ensured, and the movable member 21 and the support member 22 can move relatively freely within a set range, improving the smoothness of the movement between the movable member 21 and the support member 22.

[0031] In another exemplary embodiment provided by the present disclosure, a ring-shaped limiting structure can be provided on the support member 22, and the movable member 21 can be passed through the ring-shaped limiting structure, so as to rotatably connect the movable member 21 to the support member 22. Of course, other structures that can rotatably connect the movable member 21 to the support member 22 can also be provided on the support member 22. The present disclosure does not make specific limitations in this regard.

[0032] In the exemplary embodiment provided by the present disclosure, referring to Figure 1 andFigure 2 As shown in Figure 2 , the plugging member 3 can be hingedly connected to the movable member 21 through a third hinge 31. In this way, during the rotation of the movable member 21, the plugging member 3 can always maintain a vertical state by relying on its own gravity, which is beneficial for the plugging member 3 to better plug the drain opening 11.

[0033] In the exemplary embodiment provided by the present disclosure, referring to Figure 1 and Figure 2 As shown in Figure 1 and Figure 2 , the plugging member 3 may include a connecting rod 32 and a plugging head 33. The connecting rod 32 is hingedly connected to the movable member 21 through a third hinge 31. The plugging head 33 is connected to the connecting rod 32 and is configured to be conical. The diameter of the plugging head 33 gradually decreases from the connecting rod 32 towards the direction away from the connecting rod 32. Here, the connecting rod 32 and the plugging head 33 can be integrally formed by machining to ensure the strength of the plugging member 3 and its stability during use. In order to enable the plugging member 3 to better be in a vertical state, the plugging member 3 can be made of a metal material. In addition, the drain opening 11 can be set to a funnel shape, so that the plugging head 33 can better fit with the drain opening 11, improving the sealing performance after the drain opening 11 is closed and avoiding steam leakage.

[0034] In the exemplary embodiment provided by the present disclosure, referring to Figure 1 and Figure 2 As shown in Figure 1 and Figure 2 , a first flange 4 is provided at the top of the steam trap body, and a second flange 5 is provided at the bottom of the steam pipe 100. The first flange 4 and the second flange 5 are detachably connected. By providing the first flange 4 and the second flange 5, it is convenient for the steam trap body to be docked with the lower part of the steam pipe 100, improving the installation efficiency and being beneficial for later disassembly and maintenance.

[0035] In the exemplary embodiment provided by the present disclosure, referring to Figure 1 As shown in Figure 1 , a filter screen 6 is provided in the cavity 1, and the filter screen 6 is arranged below the connection part between the steam trap body and the steam pipe 100. By providing the filter screen 6, impurities flowing out from the steam pipe 100 can be filtered out, preventing the impurities from blocking the drain opening 11 and ensuring the smooth flow of the steam trap.

[0036] In the present disclosure, in order to facilitate the cleaning or replacement of the filter screen 6, the filter screen 6 can be a filter element net with a threaded part 61, and a threaded hole 12 is opened on the inner wall of the cavity 1. In this way, by threadedly mating the threaded part 61 with the threaded hole 12, the filter screen 6 is installed in the cavity 1, so that it is convenient to disassemble and assemble the filter screen 6.

[0037] In the exemplary embodiment provided by the present disclosure, referring to Figure 1 and Figure 2As shown in the figure, the steam trap includes a blowdown valve 8, and the blowdown valve 8 is installed on the bottom wall of the cavity 1. When impurities accumulate in the cavity 1, the blowdown valve 8 can be opened to facilitate the cleaning of the impurities accumulated at the bottom of the trap cavity, improving the convenience of cleaning.

[0038] Referring to Figure 1 and Figure 2 shown in the figure, the working principle of the steam trap provided by the present disclosure will be described in detail below:

[0039] When the steam trap is in a cold state, that is, the temperature inside the cavity 1 is low. At this time, the support member 22 is in a contracted state (i.e., the state shown in Figure 1 the figure), the drain port 11 is in an open state, and the condensed water inside the cavity 1 is discharged through the drain port 11. After the condensed water is discharged, when part of the steam in the steam pipe 100 enters the cavity 1, as the temperature inside the cavity 1 rises, the support member 22 is in an expanded state (i.e., the state shown in Figure 2 the figure), the top end of the support member 22 gradually moves upward and drives the movable member 21 to rotate around the vertical rod 23. The rotation of the movable member 21 drives the blocking member 3 to move downward to close the drain port 11 to prevent steam leakage; then, when condensed water is generated in the steam pipe 100, as the condensed water continuously flows into the cavity 1, the temperature inside the cavity 1 gradually decreases. At this time, the support member 22 contracts again and drives the blocking member 3 to move upward to open the drain port 11 for drainage. This process is repeated continuously to achieve the purpose of steam blocking and drainage.

[0040] In summary, the steam trap provided by the present disclosure can automatically switch the opening and closing state of the drain port 11 according to the medium inside the cavity 1, such as temperature changes caused by condensed water, steam, etc., without additionally setting driving devices, which is more energy-saving. Moreover, the steam trap provided by the present disclosure has a high drainage efficiency, can avoid steam leakage, and has good practicability.

[0041] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0042] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0043] Furthermore, any combination can be made between different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A steam trap for installation in a steam pipeline, characterized in that: The steam trap comprises a trap body and a drainage mechanism. The trap body is installed at the bottom of the steam pipe and forms a cavity connected to the steam pipe. The bottom wall of the cavity is provided with a drainage port. The drainage mechanism is arranged in the cavity and comprises a movable part, a support part and a blocking part. The support part is vertically installed at the bottom wall of the cavity. The movable part is rotatably connected to the support part, and a first connection point between the movable part and the support part is arranged between two ends of the movable part. The blocking part is connected to an end of the movable part and is used to block the drainage port. The support part is constructed to be able to expand and contract in the vertical direction so that the movable part rotates around the first connection point and drives the blocking part to open or block the drainage port.

2. The steam trap according to claim 1, characterized in that: The drainage mechanism also includes a vertical rod, which is fixed to the bottom wall of the cavity and extends in the vertical direction. The movable member is rotatably connected to the vertical rod, and the second connection point between the movable member and the vertical rod is arranged between the first connection point and the blocking member.

3. The steam trap according to claim 2, characterized in that: The vertical pole is configured to be able to expand and contract in the vertical direction, and a thermal expansion coefficient of the vertical pole is smaller than a thermal expansion coefficient of the support member.

4. The steam trap according to claim 2, characterized in that: The movable member is hingedly connected to the vertical rod through a first hinge.

5. The steam trap according to claim 1, characterized in that: The supporting member is hingedly connected to the movable member via a second hinge.

6. The steam trap according to any one of claims 1 to 5, characterized in that: The blocking member is hingedly connected to the movable member via a third hinge.

7. The steam trap according to claim 6, characterized in that: The plugging member includes a connecting rod and a plugging head, the connecting rod is hingedly connected to the movable member through the third hinge, the plugging head is connected to the connecting rod and is constructed in a conical shape, and the diameter of the plugging head gradually decreases from the connecting rod toward a direction away from the connecting rod.

8. The steam trap according to claim 1, characterized in that: A first flange is provided at the top of the steam trap body, and a second flange is provided at the bottom of the steam pipe. The first flange is detachably connected to the second flange.

9. The steam trap according to claim 1, characterized in that: A filter screen is provided in the cavity, and the filter screen is arranged below the connection between the steam trap body and the steam pipe.

10. The steam trap according to claim 1, characterized in that: The steam trap comprises a drain valve, and the drain valve is installed on the bottom wall of the cavity.

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