Ultralow-temperature ball valve with pressure relief effect

Abstract

The utility model relates to the technical field of ultralow-temperature ball valves, in particular to an ultralow-temperature ball valve with a pressure relief effect, which comprises a valve body, connecting rings are arranged on two sides of the valve body, and pipelines are fixedly connected to the outer sides of the connecting rings. By arranging components such as a valve body, a ball valve, a fixing block, a pressure relief hole, a connecting pipe, a supporting pipe, a fixing plate, a baffle, an exhaust hole, a strong spring, a sealing plug and an exhaust groove, a valve rod is rotated firstly, the valve rod drives the fixing block and the ball valve to rotate, a channel in a pipeline is blocked through the ball valve, and the valve is closed; gas remaining in the ball valve can enter the supporting pipe along the pressure relief hole, the pressure in the supporting pipe can be continuously increased along with rising of the temperature, the gas in the supporting pipe can penetrate through the exhaust hole to enter the fixing plate, under the strong pressure, the gas pushes the sealing plug to move upwards, and the strong spring can be lengthened at the moment; when the exhaust groove in the sealing plug is higher than the fixing plate, the pressure gas in the supporting pipe can be exhausted from the exhaust groove.

Description

Technical Field

[0001] The utility model relates to the technical field of ultra-low temperature ball valves, in particular to an ultra-low temperature ball valve with a pressure relief effect. Background Art

[0002] Ultra-low-temperature ball valves are used for media operating temperatures below -101°C. They are usually manufactured from low-alloy steel with excellent low-temperature performance and have special requirements for structural design and process. The main material must be austenitic stainless steel, copper alloy, or aluminum alloy with a face-centered cubic lattice. Its low-temperature mechanical properties after heat treatment, especially low-temperature impact toughness, must meet standard requirements. Most valves use long-neck ball valves, which can effectively prevent frost and ice formation in low-temperature environments.

[0003] After the existing cryogenic ball valve is closed, a certain amount of cryogenic gas or liquid will remain in the valve and support tube. As time passes, the temperature of the cryogenic gas or liquid will return to room temperature. As the temperature rises, there is a risk that the residual gas in the valve and support tube will expand, causing the cryogenic ball valve to deform or even explode, which is very dangerous. Therefore, to address the above problem, a cryogenic ball valve with a pressure relief effect is proposed. Summary of the Invention

[0004] The purpose of the utility model is to provide a cryogenic ball valve with a pressure relief effect to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] When unclamping said control button, under the effect of the compression spring and the bubble holding vessel internal pressure that shaves, combine closely in the interior edge of valve gap and sealing load chamber, and burble goes out control valve thereby control is shaved.

[0007] Preferably, a reinforcement layer is fixedly connected to the outer side of the support tube, and a thermal insulation layer is fixedly connected to the outer side of the reinforcement layer.

[0008] Preferably, the bottom end of the valve stem and the top end of the fixing block are fixedly connected together, and the upper half of the fixing block is arranged on the inner side of the connecting pipe.

[0009] Preferably, the exhaust groove is T-shaped when viewed from the front, and there are two exhaust grooves, which are symmetrically arranged on the inner side of the fixing plate.

[0010] Preferably, the outer diameter of the lower half of the sealing plug is the same as the inner diameter of the fixing plate, and the outer shape of the lower half of the sealing plug is the same as the inner shape of the fixing plate.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. In the utility model, the valve body, ball valve, fixed block, pressure relief hole, connecting pipe, support pipe, fixed plate, baffle, exhaust hole, strong spring, sealing plug and exhaust groove and other components are provided. First, the valve stem is turned to drive the fixed block and the ball valve to rotate through the valve stem, and the passage in the pipeline is blocked by the ball valve to close the valve. The residual gas in the ball valve will flow into the support pipe along the pressure relief hole. As the temperature rises, the pressure in the support pipe will continue to increase, and the gas in the support pipe will pass through the exhaust hole and enter the fixed plate. Under strong pressure, the gas pushes the sealing plug to move upward, and the strong spring will be stretched at this time. When the exhaust groove on the sealing plug is higher than the fixed plate, the pressurized gas in the support pipe will be discharged from the exhaust groove. When the gas After the body is emptied, the strong spring will drive the sealing plug to reset and re-enter the interior of the fixed plate. When the valve is normally open, the pressure in the support tube is relatively small and cannot stretch the strong spring, so there will be no accidental leakage. The sealing plug can only be pushed when the pressure in the valve and the support tube is too high. The above operation prevents the valve from being damaged by excessive pressure, thereby solving the problem that after the existing ultra-low temperature ball valve is closed, a certain amount of ultra-low temperature gas or liquid will remain in the valve and the support tube. As time goes by, the temperature of the ultra-low temperature gas or liquid will return to room temperature. As the temperature rises, there is a risk of expansion of the residual gas in the valve and the support tube, causing the ultra-low temperature ball valve to deform or even explode, which is very dangerous.

[0013] 2. In the present invention, the reinforcement layer can further enhance the pressure resistance of the support tube and prevent it from being damaged. The insulation layer can slow down the rate of temperature rise of the gas in the support tube after the ball valve is closed. Under normal use, the gas in the support tube can be kept warm, reducing the temperature loss in the valve body and the support tube, so that the gas or liquid in the valve can maintain its original ultra-low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 For this utility model Figure 2 Schematic diagram of the structure at point A.

[0017] In the figure: 1. Valve body; 2. Connecting ring; 3. Pipe; 4. Ball valve; 5. Fixing block; 6. Pressure relief hole; 7. Connecting pipe; 8. Support pipe; 9. Valve stem; 10. Fixing plate; 11. Baffle; 12. Exhaust hole; 13. Strong spring; 14. Sealing plug; 15. Exhaust groove; 16. Reinforcement layer; 17. Insulation layer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0021] See also Figure 1-3 , the utility model provides a technical solution:

[0022] A cryogenic ball valve with a pressure relief effect comprises a valve body 1, connecting rings 2 are provided on both sides of the valve body 1, a pipe 3 is fixedly connected to the outside of the connecting ring 2, a ball valve 4 is provided on the inside of the valve body 1, the top of the ball valve 4 is fixedly connected to a fixed block 5 located on the inside of the valve body 1, and symmetrical pressure relief holes 6 are provided inside the fixed block 5 and the ball valve 4, the top of the valve body 1 is fixedly connected to a connecting pipe 7, the top of the connecting pipe 7 is fixedly connected to a supporting pipe 8, the top of the supporting pipe 8 is fixedly connected to a fixing plate 10, the inside of the fixing plate 10 is rotatably connected to a valve stem 9 located on the inside of the supporting pipe 8, the inside of the fixing plate 10 is fixedly connected to a baffle 11 located on both sides of the valve stem 9, an exhaust hole 12 is provided on the top of the baffle 11, the top of the baffle 11 is fixedly connected to a strong spring 13 located inside the fixing plate 10, the top of the strong spring 13 is fixedly connected to a sealing plug 14 located inside the fixing plate 10, and an exhaust groove 15 is provided inside the sealing plug 14.

[0023] The outer side of the support tube 8 is fixedly connected with a reinforcement layer 16, and the outer side of the reinforcement layer 16 is fixedly connected with an insulation layer 17. The reinforcement layer 16 provided can better protect the support tube 8, and the insulation layer 17 can maintain the temperature inside the support tube 8; the bottom end of the valve stem 9 and the top end of the fixed block 5 are fixedly connected together, and the upper half of the fixed block 5 is provided on the inner side of the connecting tube 7, so that the valve stem 9 drives the ball valve 4 to rotate through the fixed block 5; the exhaust groove 15 is T-shaped when viewed from the front, and the number of the exhaust grooves 15 is two, and they are symmetrically arranged on the inner side of the fixed plate 10. The T-shaped exhaust groove 15 provided is more conducive to the discharge of high-pressure gas and improves the efficiency of pressure discharge; the outer diameter of the lower half of the sealing plug 14 is the same as the inner diameter of the fixed plate 10, and the outer shape of the lower half of the sealing plug 14 is the same as the inner shape of the fixed plate 10, so as to ensure the sealing effect of the sealing plug 14 and prevent gas leakage.

[0024] Working process: When it is necessary to use a cryogenic ball valve with a pressure relief effect, first rotate the valve stem 9, and drive the fixed block 5 and the ball valve 4 to rotate through the valve stem 9, and block the channel in the pipeline 3 through the ball valve 4 to close the valve. The residual gas in the ball valve 4 will enter the support tube 8 along the pressure relief hole 6. As the temperature rises, the pressure in the support tube 8 will continue to increase, and the gas in the support tube 8 will pass through the exhaust hole 12 into the fixed plate 10. Under strong pressure, the gas pushes the sealing plug 14 to move upward, and the strong spring 13 will be stretched at this time. When the exhaust groove 15 on the sealing plug 14 is higher than the fixed plate 10, the pressurized gas in the support tube 8 will be discharged from the exhaust groove 15. When the gas is emptied, the strong spring 13 will drive the sealing plug 14 to reset and re-enter the fixed plate 1 0, when the valve is normally open, the pressure in the support tube 8 is relatively small, and the strong spring 13 cannot be stretched, and no accidental leakage will occur. Only when the pressure in the valve and the support tube 8 is too high can the sealing plug 14 be pushed. The above operation achieves the effect of preventing the valve from being damaged due to excessive pressure. The reinforcement layer 16 can further enhance the pressure resistance of the support tube 8 to prevent damage. The insulation layer 17 can slow down the rate of temperature rise of the gas in the support tube 8 after the ball valve 4 is closed, giving the staff enough time to leave the valve and prevent the ejected gas from causing harm to the human body. Under normal use, the gas in the support tube 8 can be kept warm, reducing the temperature loss in the valve body 1 and the support tube 8, so that the gas or liquid in the valve maintains its original ultra-low temperature.

[0025] Any matters not described in detail in this specification are prior art known to those skilled in the art. Standard parts used in this utility model are commercially available, and special-shaped parts can be customized according to the description in the specification and the accompanying drawings. The specific connection methods of each part are all conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment are all conventional models in the prior art, and the circuit connections use conventional connection methods in the prior art, which will not be described in detail here.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cryogenic ball valve with a pressure relief effect, comprising a valve body (1), characterized in that: The valve body (1) is provided with connecting rings (2) on both sides, and the outer side of the connecting ring (2) is fixedly connected to a pipeline (3), and the inner side of the valve body (1) is provided with a ball valve (4), and the top end of the ball valve (4) is fixedly connected to a fixed block (5) located on the inner side of the valve body (1), and the interiors of the fixed block (5) and the ball valve (4) are provided with symmetrically arranged pressure relief holes (6), and the top end of the valve body (1) is fixedly connected to a connecting pipe (7), and the top end of the connecting pipe (7) is fixedly connected to a supporting pipe (8), and the top end of the supporting pipe (8) is fixedly connected to a fixing plate (1). 0), the interior of the fixed plate (10) is rotatably connected to a valve stem (9) located inside the support tube (8), the interior of the fixed plate (10) is fixedly connected to baffles (11) located on both sides of the valve stem (9), the top of the baffle (11) is provided with an exhaust hole (12), the top of the baffle (11) is fixedly connected to a strong spring (13) located inside the fixed plate (10), the top of the strong spring (13) is fixedly connected to a sealing plug (14) located inside the fixed plate (10), and the interior of the sealing plug (14) is provided with an exhaust groove (15).

2. The cryogenic ball valve with pressure relief effect according to claim 1, characterized in that: The outer side of the support tube (8) is fixedly connected to a reinforcement layer (16), and the outer side of the reinforcement layer (16) is fixedly connected to a thermal insulation layer (17).

3. The cryogenic ball valve with pressure relief effect according to claim 2, characterized in that: The bottom end of the valve stem (9) and the top end of the fixed block (5) are fixedly connected together, and the upper half of the fixed block (5) is arranged on the inner side of the connecting pipe (7).

4. The cryogenic ball valve with pressure relief effect according to claim 1, characterized in that: The exhaust groove (15) is T-shaped when viewed from the front. There are two exhaust grooves (15) and they are symmetrically arranged on the inner side of the fixed plate (10).

5. The cryogenic ball valve with pressure relief effect according to claim 1, characterized in that: The outer diameter of the lower half of the sealing plug (14) is the same as the inner diameter of the fixing plate (10), and the outer shape of the lower half of the sealing plug (14) is the same as the inner shape of the fixing plate (10).

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