Marine steam trap structure

Abstract

The utility model relates to the technical field of steam trap valve groups, in particular to a marine steam trap valve structure which comprises a valve body, a valve inlet, a valve cavity and a valve outlet are sequentially arranged in the valve body in a communicated mode, and the valve cavity is further provided with an opening and a valve body upper cover. An adjustable valve rod is installed on the valve body upper cover, extends to the steam trap upper cover and is connected with the steam trap upper cover so as to control the position of the steam trap upper cover in the valve piece cavity, a valve seat is installed on the steam trap body so as to communicate the valve piece inlet with the valve piece cavity, and when the steam trap body abuts against the valve seat, the valve piece inlet and the valve piece outlet are communicated through the steam trap body. And when the steam trap body is far away from the valve seat, the valve inlet and the valve outlet are directly communicated through a gap between the steam trap body and the valve seat in the valve cavity. According to the drain valve set, switching of the on-off state between the valve inlet and the valve outlet is conveniently achieved, compared with an existing drain valve set, the drain valve set is more compact in structure, a large amount of space is saved, and pipeline installation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of steam trap valve groups, in particular to a marine steam trap valve structure. Background Art

[0002] It is very common to use steam on ships to heat fuel oil, fresh water, etc. After steam exchanges heat with the medium, it will condense water. If this condensed water cannot be discharged in a timely and effective manner, water hammer will occur in the pipeline during steam transportation, causing impact and damage to the pipeline, which can easily lead to damage to the transportation pipeline. At the same time, the water in the steam pipeline also affects the heat exchange efficiency between steam and the medium, so a steam trap must be installed in the steam circuit. The steam traps installed in the past were all a valve group. Because of the possible damage of the steam trap, the valve group was designed with a steam trap isolation valve and a bypass valve, as well as a sampling valve to detect whether the condensate contains other media (see Figure 1 However, the steam trap group has many valve accessories and is large in size. It is difficult to arrange the steam trap group in places with limited space. Therefore, the utility model proposes a marine steam trap structure. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a marine steam trap structure. By adjusting the position of the steam trap in the valve chamber, the on-off state of the valve inlet and the valve outlet can be easily switched. Compared with the previous steam trap group structure, it is more compact, saves a lot of space, and is more convenient for pipeline installation.

[0004] The marine steam trap structure of this solution includes a valve body having a valve inlet, a valve chamber, and a valve outlet sequentially connected thereto. The steam trap body and a connected steam trap cover are mounted in the valve chamber. The valve chamber further has an opening on which the valve body cover is mounted. An adjustable valve stem is mounted on the valve body cover and extends to and is connected to the steam trap cover to control the position of the steam trap cover within the valve chamber. The steam trap body is equipped with a valve seat to connect the valve inlet and the valve chamber. When the steam trap body abuts the valve seat, the valve inlet and valve outlet are connected through the steam trap body. When the steam trap body is away from the valve seat, the valve inlet and valve outlet are directly connected through the gap between the steam trap body and the valve seat in the valve chamber.

[0005] The technical solution further defined in the present utility model is:

[0006] Furthermore, one end of the steam trap body away from the valve inlet and the steam trap upper cover together form a steam trap chamber, wherein a disc is movably provided in the steam trap chamber to separate the steam trap chamber into a first steam trap chamber and a second steam trap chamber, and the second steam trap chamber is connected to the valve outlet. When the disc is tightly attached to the steam trap body, the valve inlet and the second steam trap chamber are isolated, and when the disc is away from the steam trap body, the valve inlet and the second steam trap chamber are connected.

[0007] Furthermore, the valve body is provided with a sampling ball valve in the valve inlet.

[0008] Furthermore, the sampling ball valve is connected to the valve body through a compression cover.

[0009] Furthermore, a filter is installed in the inlet of the valve member.

[0010] Furthermore, the steam trap body and the steam trap upper cover are fixedly connected, and the valve stem and the steam trap upper cover are rotatably connected via a valve stem pressing block.

[0011] Furthermore, the steam trap body includes a thermodynamic steam trap.

[0012] Furthermore, the end of the valve body upper cover away from the valve body is provided with packing, a stuffing box pressing block for pressing the packing, and a stuffing box cover for pressing the stuffing box pressing block, and the valve stem passes through the packing, the stuffing box pressing block and the stuffing box cover.

[0013] Furthermore, the valve stem is threadedly connected to the valve body upper cover.

[0014] Furthermore, the end of the valve stem away from the steam trap upper cover is connected to a handwheel.

[0015] The beneficial effects of the utility model are as follows: the utility model is suitable for use on a steam condensate pipeline on a ship to drain steam condensate, prevent steam backflow, and perform daily inspections on whether there is oil leakage in the pipeline. By adjusting the position of the steam trap in the valve chamber, the on-off state between the valve inlet and the valve outlet can be conveniently switched. The utility model can replace the previous steam trap valve group. Compared with the previous steam trap valve group, the structure is more compact, a large amount of space is saved, and pipeline installation is more convenient. At the same time, the utility model has the effects of draining and bypassing, but saves two valves, and has the advantages of compact structure, more convenient operation, and cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a common marine steam trap group;

[0017] Figure 2 This is a cross-sectional view of the structure of a marine steam trap in an embodiment of the present utility model;

[0018] Wherein: 1. Valve body; 2. Valve seat; 3. Steam trap body; 4. Disc; 5. Steam trap cover; 6. Valve stem clamping block; 7. Valve stem; 8. Valve body cover; 9. Stuffing box cover; 10. Stuffing; 11. Stuffing box clamping block; 12. Handwheel; 13. Strainer; 14. Clamping cover; 15. Sampling ball valve; 16. Valve inlet; 17. Valve outlet; 51. Steam trap first chamber; 52. Steam trap second chamber.

[0019] 20. Isolation valve; 21. Steam trap; 22. Sampling valve; 23. Bypass valve. DETAILED DESCRIPTION

[0020] See also Figure 1 , is a schematic diagram of the structure of a common marine steam trap group, which has a steam trap 21, a sampling valve 22, a bypass valve 23 and two isolation valves 20. The steam trap group has a large number of valve accessories.

[0021] like Figure 2 As shown, the marine steam trap structure provided in this embodiment includes a valve body 1. A valve inlet 16, a valve chamber, and a valve outlet 17 are sequentially connected within the valve body 1. A steam trap body 3 and a steam trap cover 5 fixedly connected thereto are mounted within the valve chamber. The steam trap body 3 in this embodiment is specifically a thermodynamic steam trap. An opening is provided above the valve chamber and a valve body cover 8 is mounted thereon. An adjustable valve stem 7 is mounted on the valve body cover 8 and extends to abut the steam trap cover 5. Specifically, a valve stem clamping block 6 at the bottom of the valve stem 7 is rotatably connected to the steam trap cover 5. By rotating the valve stem 7, the steam trap cover 5 can be controlled to the highest position in the valve chamber. The valve stem 7 has a threaded section that matches the thread of the valve body cover 8. A handwheel 12 is connected to the end of the valve stem 7 away from the steam trap cover 5 to control the rotation and raising and lowering of the valve stem 7. The end of the steam trap body 3 away from the valve inlet 16 and the steam trap upper cover 5 together form a steam trap chamber. A disc 4 is movably provided in the steam trap chamber to separate the steam trap chamber into a first steam trap chamber 51 and a second steam trap chamber 52. The second steam trap chamber 52 is connected to the valve outlet 17. When the disc 4 is in close contact with the steam trap body 3, the valve inlet 16 and the second steam trap chamber 52 are isolated. When the disc 4 is away from the steam trap body 3, the valve inlet 16 and the second steam trap chamber 52 are connected.

[0022] In this embodiment, a sampling ball valve 15 is provided in the valve inlet 16 of the valve body 1 . The sampling ball valve 15 is connected to the valve body 1 via a compression cover 14 . A filter screen 13 is also installed in the valve inlet 16 .

[0023] Specifically, the steam trap body 3 is equipped with a valve seat 2 to connect the valve inlet 16 and the valve chamber. That is, the steam trap body 3 and the steam trap cover 5 are pressed against the valve seat 2 via the adjustable valve stem 7. When the steam trap body 3 abuts the valve seat 2, the valve inlet 16 and the valve outlet 17 can only be connected through the steam trap body 3. When the steam trap body 3 is away from the valve seat 2, the valve inlet 16 and the valve outlet 17 can also be directly connected through the gap between the steam trap body 3 and the valve seat 2 in the valve chamber.

[0024] See Figure 2 In the upper part, the end of the valve body cover 8 away from the valve body 1 is provided with a packing 10, a stuffing box pressing block 11 that presses it, and a stuffing box cover 9 that presses the stuffing box pressing block 11. The valve stem 7 passes through the packing 10, the stuffing box pressing block 11 and the stuffing box cover 9, which can ensure the sealing of the connection between the valve body cover 8 and the valve stem 7.

[0025] The marine steam trap structure provided in this embodiment is installed on the steam condensate pipeline via a flange connection, resulting in a very compact structure and easy operation. This embodiment utilizes a thermodynamic steam trap. This valve utilizes the different thermodynamic principles of the flow rates and volume changes of steam and condensate as they pass through it, creating different pressure differentials above and below the disc 4, which drives the disc 4 to open and close the valve body 1. During normal operation, tightening the handwheel 12 closes the trap body 3 against the valve seat 2. When condensate accumulates in the pipeline, the condensate pushes against the disc 4 due to the operating pressure, allowing it to be quickly discharged. When the condensate is discharged and steam is subsequently discharged, a pressure differential is generated above and below the disc 4 due to the larger volume and flow rate of the steam than the condensate, causing the disc 4 to close rapidly under the suction force of the steam flow rate. When the disc 4 is closed, it is subjected to pressure from both sides. The force applied to the lower surface of the disc is smaller than that applied to the upper surface. Because the pressure inside the trap chamber is derived from the steam, the force applied to the upper surface of the disc 4 is greater than that applied to the lower surface, keeping the disc 4 tightly closed. When the steam in the steam trap chamber cools and condenses into water, the pressure inside the steam chamber decreases. The condensate, due to the operating pressure, pushes disc 4 open, and the condensate continues to discharge, circulating the system and discharging it intermittently. Regularly open the sampling ball valve 15 to check for other media in the discharged condensate and to determine if the steam heating pipe is damaged. If the sampling ball valve 15 only discharges steam and the temperature of the downstream pipeline is too high or too low, the steam trap is malfunctioning. To avoid affecting the normal operation of the system, slowly rotate the handwheel 12 counterclockwise. The valve stem 7 will lift the steam trap body 3 off the valve seat 2, bypassing the steam trap. The steam carrying condensate passes through the valve seat 2 and reaches the valve outlet 17, where it is then recovered along the pipeline to the hot well. This valve has a simple structure, comprehensive functions, and is easy to arrange and operate.

[0026] In addition to the above embodiments, the present invention may also have other implementation methods; any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A marine steam trap structure, comprising a valve body (1), wherein a valve inlet (16), a valve chamber and a valve outlet (17) are sequentially connected and opened in the valve body (1), characterized in that: A steam trap body (3) and a steam trap upper cover (5) connected thereto are installed in the valve chamber, and the valve chamber is provided with an opening and a valve body upper cover (8) is installed thereon. An adjustable valve stem (7) is installed on the valve body upper cover (8) and extends to and is connected to the steam trap upper cover (5) to control the position of the steam trap upper cover (5) in the valve chamber. The steam trap body (3) is installed with a valve seat (2) to connect the valve inlet (16) and the valve chamber. When the steam trap body (3) abuts against the valve seat (2), the valve inlet (16) and the valve outlet (17) are connected through the steam trap body (3). When the steam trap body (3) is away from the valve seat (2), the valve inlet (16) and the valve outlet (17) are directly connected through the gap between the steam trap body (3) and the valve seat (2) in the valve chamber.

2. The marine steam trap structure according to claim 1, characterized in that: The end of the steam trap body (3) away from the valve inlet (16) and the steam trap upper cover (5) together form a steam trap chamber, wherein a disc (4) is movably arranged in the steam trap chamber to separate the steam trap chamber into a first steam trap chamber (51) and a second steam trap chamber (52), and the steam trap second chamber (52) is connected to the valve outlet (17). When the disc (4) is in close contact with the steam trap body (3), the valve inlet (16) and the steam trap second chamber (52) are in an isolated state, and when the disc (4) is away from the steam trap body (3), the valve inlet (16) and the steam trap second chamber (52) are in a connected state.

3. The marine steam trap structure according to claim 1, characterized in that: The valve body (1) is provided with a sampling ball valve (15) in a valve inlet (16).

4. The marine steam trap structure according to claim 3, characterized in that: The sampling ball valve (15) is connected to the valve body (1) via a compression cover (14).

5. The marine steam trap structure according to claim 1, characterized in that: A filter screen (13) is installed in the valve inlet (16).

6. The marine steam trap structure according to claim 1, characterized in that: The steam trap body (3) and the steam trap upper cover (5) are fixedly connected, and the valve stem (7) and the steam trap upper cover (5) are rotatably connected via a valve stem clamping block (6).

7. The marine steam trap structure according to claim 1, characterized in that: The steam trap body (3) comprises a thermodynamic steam trap.

8. The marine steam trap structure according to claim 1, characterized in that: The end of the valve body upper cover (8) away from the valve body (1) is provided with a packing (10), a packing box pressing block (11) pressing the packing box, and a packing box cover (9) pressing the packing box pressing block (11), and the valve stem (7) passes through the packing (10), the packing box pressing block (11) and the packing box cover (9).

9. The marine steam trap structure according to claim 1, characterized in that: The valve stem (7) is threadedly connected to the valve body upper cover (8).

10. The marine steam trap structure according to claim 1, characterized in that: The end of the valve stem (7) away from the steam trap upper cover (5) is connected to a hand wheel (12).

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