Ultralow-temperature stop valve with pressure relief device

Abstract

The utility model discloses an ultralow-temperature stop valve with a pressure relief device, and relates to the technical field of ultralow-temperature stop valves of pressure relief devices. The ultralow-temperature stop valve with the pressure relief device comprises a valve body, a cold-resistant protective sheet, a protective shell and a limiting unit. According to the ultralow-temperature stop valve with the pressure relief device, the structure that the cold-resistant protection unit is arranged outside the main valve body is adopted, the first protection layer is made of stainless steel, physical protection and external impact resistance are conveniently provided, the second protection layer is made of polyurethane foam, and the ultralow-temperature stop valve has excellent heat preservation performance and mechanical strength; the third protective layer is made of an aluminum silicate fiber felt material and has a low heat conductivity coefficient and good flexibility, and the cold-resistant protective unit can achieve the purposes of protection and heat preservation on the valve body main body.

Description

Technical Field

[0001] This utility model relates to the field of cryogenic shut-off valve technology with pressure relief device, specifically a cryogenic shut-off valve with pressure relief device. Background Technology

[0002] The cryogenic shut-off valve with pressure relief device is designed for extreme low temperature environments and is commonly used in cryogenic industries such as liquefied natural gas and liquefied petroleum gas. When the pressure at the inlet end is too high, it can quickly relieve pressure to ensure the safe and stable operation of the system.

[0003] Existing cryogenic shut-off valves with pressure relief devices typically utilize a needle valve and a pilot valve in tandem to achieve rapid pressure relief after parameter settings, ensuring safe and stable system operation. However, the conduit and control handle of these valves are exposed. When installing these valves in cold outdoor environments, the control handle is prone to accidental activation, leading to changes in the set parameters and resulting in frequent, time-consuming, and laborious adjustments. Furthermore, the conduit, often made of copper, is easily damaged by impacts. To address these shortcomings, this invention provides a cryogenic shut-off valve with a pressure relief device to solve the aforementioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an ultra-low temperature shut-off valve with a pressure relief device, which solves the problems of the control handle being easily accidentally touched, leading to changes in its set parameters, resulting in frequent and time-consuming adjustments, and the fact that the conduit is mostly made of copper pipe, which is easily damaged by impact.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cryogenic shut-off valve with a pressure relief device, comprising:

[0006] Valve body body;

[0007] The cold-resistant protection unit includes a first protective layer disposed on the outside of the valve body. The cold-resistant protection unit facilitates the protection and heat preservation of the valve body. A fixing block is fixedly connected to the front of the first protective layer.

[0008] The protective shell has a third protective layer.

[0009] A limiting unit is disposed within a fixed block, and the limiting unit is used to limit the protective shell.

[0010] Preferably, the cold-resistant protection unit further includes:

[0011] The second protective layer is fixedly connected to the inner wall of the first protective layer;

[0012] The third protective layer is fixedly connected to the inner wall of the second protective layer.

[0013] Preferably, the limiting unit includes:

[0014] The spring body has one end fixedly connected to the inner wall of the fixed block;

[0015] The slider is slidably connected to the fixed block, and the other end of the spring body is fixedly connected to the slider.

[0016] Preferably, a locking block is fixedly connected to the end of the slider away from the spring body, and the locking block is engaged inside the protective shell.

[0017] Preferably, a connector is fixedly connected to the front of the first protective layer, and a slot is provided inside the cold-resistant protection unit.

[0018] Preferably, an adjusting member is fixedly connected to the bottom of the protective shell, and the adjusting member is rotatably connected inside the connecting member.

[0019] Preferably, the valve body is provided with a needle valve and a pilot valve, and a conduit is connected to the outside of the valve body, the conduit being connected to the needle valve and the pilot valve.

[0020] Preferably, connecting flanges are fixedly connected to both sides of the valve body.

[0021] This utility model discloses an ultra-low temperature shut-off valve with a pressure relief device, which has the following beneficial effects:

[0022] This cryogenic shut-off valve with a pressure relief device adopts a structure with an anti-cold protection unit on the outside of the valve body. The first protective layer is made of stainless steel, which provides physical protection against external impacts. The second protective layer is made of polyurethane foam, which has excellent thermal insulation performance and mechanical strength, and can effectively isolate the valve from the influence of the external low temperature environment. The third protective layer is made of aluminum silicate fiber felt, which has a low thermal conductivity and good flexibility. The anti-cold protection unit can protect and insulate the valve body, while the protective shell can protect the control handle of the needle valve and effectively prevent it from being accidentally touched. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the main structure of the valve body of this utility model;

[0026] Figure 3 This is a schematic diagram of the cold-resistant protection unit structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the limiting unit structure of this utility model.

[0028] In the diagram: 1. Valve body; 11. Connecting flange; 12. Needle valve; 13. Pilot valve; 14. Guide tube; 2. Protective shell; 21. Adjusting component; 3. Cold protection unit; 31. First protective layer; 311. Connecting component; 312. Fixing block; 313. Groove; 32. Second protective layer; 33. Third protective layer; 4. Limiting unit; 41. Spring body; 42. Slider; 43. Locking block. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] This application embodiment solves the problems of the control handle being easily accidentally touched, leading to changes in its set parameters, resulting in frequent and time-consuming adjustments, and the fact that the conduit 14 is mostly made of copper pipe, which is easily damaged by impact, by providing an ultra-low temperature shut-off valve with a pressure relief device. It achieves the structure of setting an anti-cold protection unit 3 on the outside of the valve body 1. The first protective layer 31 is made of stainless steel, which can provide physical protection and resist external impact. The second protective layer 32 is made of polyurethane foam, which has excellent thermal insulation performance and mechanical strength and can effectively isolate the influence of the external low temperature environment on the valve. The third protective layer 33 is made of aluminum silicate fiber felt, which has low thermal conductivity and good flexibility. The anti-cold protection unit 3 can protect and insulate the valve body 1. At the same time, the protective shell 2 can protect the control handle of the needle valve 12 and effectively prevent it from being accidentally touched.

[0031] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0032] Example 1;

[0033] This utility model embodiment discloses an ultra-low temperature shut-off valve with a pressure relief device, according to the appendix... Figure 1-4 As shown, it includes:

[0034] Valve body 1;

[0035] The cold protection unit 3 includes a first protective layer 31 disposed on the outside of the valve body 1. The cold protection unit 3 can provide protection and heat preservation for the valve body 1. A fixing block 312 is fixedly connected to the front of the first protective layer 31.

[0036] The protective shell 2 is provided with a third protective layer 33;

[0037] Limiting unit 4 is disposed within fixing block 312 and is used to limit the protective shell 2.

[0038] Cold-resistant protection unit 3 also includes:

[0039] The second protective layer 32 is fixedly connected to the inner wall of the first protective layer 31;

[0040] The third protective layer 33 is fixedly connected to the inner wall of the second protective layer 32.

[0041] A needle valve 12 and a pilot valve 13 are provided on the valve body 1. A conduit 14 is connected to the outside of the valve body 1. The conduit 14 is connected to the needle valve 12 and the pilot valve 13.

[0042] Connecting flanges 11 are fixedly connected to both sides of the valve body 1.

[0043] Initially, one path of control water enters the control chamber of pilot valve 13. When the water pressure is less than the set pressure relief value, the thrust of the spring in pilot valve 13 is greater than the water pressure, and the valve disc of pilot valve 13 is in the closed state. The other path of control water enters the upper chamber of the main valve through the throttling needle valve 12, generating a static pressure. The pressure in the upper chamber is equal to the pressure in the main flow channel. Since the upper plane of the main valve disc is larger than the lower plane, the pressure of the upper chamber on the valve disc is greater than the thrust of the water in the main flow channel on the valve disc, causing the main valve to be in the closed state.

[0044] When the water pressure in the main pipeline rises and exceeds the set pressure relief value, the water pressure entering the control chamber of the pilot valve 13 through the conduit 14 increases. The water pressure exceeds the spring thrust, at which point the pilot valve 13 opens. After the pilot valve 13 opens, the upper chamber of the main valve begins to depressurize. Due to the throttle valve's control and insufficient water supply, the pressure in the upper chamber of the main valve decreases. The thrust of the water in the main flow channel on the valve disc exceeds the pressure in the upper chamber, causing the valve disc to rise and the main valve to open rapidly, releasing pressure.

[0045] The valve body 1 is equipped with an external cold-resistant protection unit 3, which facilitates the protection and insulation of the valve body 1. The first protective layer 31 is made of stainless steel, which provides physical protection and resists external impacts. The second protective layer 32 is made of polyurethane foam, which has excellent thermal insulation performance and mechanical strength, and can effectively isolate the valve from the influence of the external low temperature environment. The third protective layer 33 is made of aluminum silicate fiber felt, which has low thermal conductivity and good flexibility. The cold-resistant protection unit 3 can protect and insulate the valve body 1.

[0046] Example 2;

[0047] This utility model embodiment discloses an ultra-low temperature shut-off valve with a pressure relief device, according to the appendix... Figure 1-4 As shown, it includes:

[0048] Valve body 1;

[0049] The cold protection unit 3 includes a first protective layer 31 disposed on the outside of the valve body 1. The cold protection unit 3 can provide protection and heat preservation for the valve body 1. A fixing block 312 is fixedly connected to the front of the first protective layer 31.

[0050] The protective shell 2 is provided with a third protective layer 33;

[0051] Limiting unit 4 is disposed within fixing block 312 and is used to limit the protective shell 2.

[0052] Limiting unit 4 includes:

[0053] The spring body 41 has one end fixedly connected to the inner wall of the fixing block 312;

[0054] The slider 42 is slidably connected to the fixed block 312, and the other end of the spring body 41 is fixedly connected to the slider 42.

[0055] A locking block 43 is fixedly connected to the end of the slider 42 away from the spring body 41, and the locking block 43 is locked inside the protective shell 2.

[0056] The first protective layer 31 is fixedly connected to the front of the connector 311, and the cold-resistant protection unit 3 is provided with a slot 313.

[0057] An adjusting component 21 is fixedly connected to the bottom of the protective shell 2, and the adjusting component 21 is rotatably connected to the connecting component 311.

[0058] When the parameters of the cryogenic shut-off valve of the pressure relief device need to be adjusted or calibrated, first open the protective shell 2 to facilitate the adjustment of the flow rate of the needle valve 12 by adjusting the control handle. First, slide the slider 42 to drive the locking block 43 to compress the spring body 41. Then, the locking block 43 and the protective shell 2 are released. Then, pull the protective shell 2 to rotate it around the connecting piece 311, that is, open the protective shell 2, exposing the control handle of the needle valve 12 for easy adjustment. Then, open the bolt safety on the pilot valve 13 to facilitate the adjustment of the threaded rod at the top to regulate the flow rate of the pilot valve 13. The needle valve 12 and the pilot valve 13 work together. After the parameters are set, the purpose of rapid pressure relief can be achieved, ensuring the safe and stable operation of the system.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cryogenic shut-off valve with a pressure relief device, characterized in that, include: Valve body (1); The cold protection unit (3) includes a first protective layer (31) disposed on the outside of the valve body (1). The cold protection unit (3) facilitates the protection and heat preservation of the valve body (1). A fixing block (312) is fixedly connected to the front of the first protective layer (31). The protective shell (2) is provided with a third protective layer (33); A limiting unit (4) is disposed within a fixing block (312), and the limiting unit (4) is used to limit the protective shell (2).

2. The cryogenic shut-off valve with pressure relief device according to claim 1, characterized in that, The cold-resistant protection unit (3) also includes: The second protective layer (32) is fixedly connected to the inner wall of the first protective layer (31); The third protective layer (33) is fixedly connected to the inner wall of the second protective layer (32).

3. The cryogenic shut-off valve with pressure relief device according to claim 1, characterized in that, The limiting unit (4) includes: The spring body (41) has one end fixedly connected to the inner wall of the fixing block (312); The slider (42) is slidably connected to the fixed block (312), and the other end of the spring body (41) is fixedly connected to the slider (42).

4. The cryogenic shut-off valve with pressure relief device according to claim 3, characterized in that, The slider (42) is fixedly connected to a locking block (43) at one end away from the spring body (41), and the locking block (43) is engaged inside the protective shell (2).

5. The cryogenic shut-off valve with pressure relief device according to claim 1, characterized in that, The first protective layer (31) is fixedly connected to a connector (311) on the front, and the cold-resistant protection unit (3) is provided with a slot (313).

6. The cryogenic shut-off valve with pressure relief device according to claim 5, characterized in that, The bottom of the protective shell (2) is fixedly connected to an adjusting member (21), which is rotatably connected to the connecting member (311).

7. The cryogenic shut-off valve with pressure relief device according to claim 1, characterized in that, The valve body (1) is provided with a needle valve (12) and a pilot valve (13). The valve body (1) is externally connected to a conduit (14), which is connected to the needle valve (12) and the pilot valve (13).

8. The cryogenic shut-off valve with pressure relief device according to claim 1, characterized in that, The valve body (1) is fixedly connected to both sides by connecting flanges (11).

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