High pressure alarm cryogenic relief valve

Abstract

The application relates to the technical field of safety valves, and provides a high-pressure alarm low-temperature safety valve, which comprises a valve body, a valve cover, a valve rod and a compensation cover, the valve body is provided with a valve cavity; the valve cover is arranged at one end of the valve body; the valve rod is movably arranged in the valve cover along the axial direction of the valve rod; the compensation cover is sleeved at one end of the valve rod; the compensation cover is provided with an air inlet space and a gas storage space; the other end of the valve rod is located in the air inlet space; wherein the valve rod can move in the air inlet space along the axial direction of the valve rod to push the air in the air inlet space into the gas storage space; the gas storage space is used for storing gas to increase the gas pressure in the gas storage space when the valve rod frequently moves to open and close the safety valve, and then the resistance received by the valve rod when moving towards the gas storage space is increased. The high-pressure alarm low-temperature safety valve provided by the application can maintain the opening pressure of the high-pressure alarm low-temperature safety valve stable, and improve the safety and reliability of a pipeline.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of safety valves, in particular to a low-temperature safety valve with high-pressure alarm. BACKGROUND

[0002] The safety valve is a valve used to discharge medium to release pressure when the pressure in the container or pipeline is too high.

[0003] The safety valve in the related art determines the opening pressure of the safety valve by the elastic force of the spring. The safety valve is adjusted in the normal state of the spring at low temperature to determine the opening pressure of the safety valve. However, the frequent opening and closing of the safety valve in a short time will cause the temperature of the spring to rise and the elastic force to decrease, thereby causing the opening pressure of the safety valve to decrease and causing the medium to leak. SUMMARY

[0004] The low-temperature safety valve with high-pressure alarm provided by the embodiments of the present application can improve the technical problem that the safety valve in the related art is frequently opened and closed at low temperature, the temperature of the spring rises, the elastic force decreases, the opening pressure decreases, and the medium leaks.

[0005] In a first aspect, the embodiments of the present application provide a low-temperature safety valve with high-pressure alarm, comprising:

[0006] a valve body, the valve body having a valve cavity;

[0007] a valve cover, the valve cover being arranged at one end of the valve body;

[0008] a valve rod, the valve rod being movably arranged along the axial direction of the valve rod in the valve cover; one end of the valve rod is located in the valve cavity; the other end of the valve rod protrudes from the valve cover away from the valve body;

[0009] a spring, the spring being sleeved on the other end of the valve rod; the spring is in abutment with the valve cover away from the valve body; the spring is used to push the one end of the valve rod located in the valve cavity away from the valve cover to close the valve;

[0010] a compensation cover, the compensation cover being arranged at the end of the valve cover away from the valve body; the compensation cover has an air inlet space and an air storage space; the other end of the valve rod is located in the air inlet space; the outside of the compensation cover is in one-way communication with the air inlet space; the air inlet space is in one-way communication with the air storage space;

[0011] The valve rod is used to open the valve when the one end of the valve rod located in the valve cavity is moved in the direction towards the valve cover, and to move the one end of the valve rod in the air intake space in the direction away from the valve body to push the air in the air intake space into the gas storage space; the gas storage space is used to store gas to increase the air pressure in the gas storage space when the valve rod is frequently moved to open and close the safety valve, thereby increasing the resistance received by the valve rod when moving towards the gas storage space.

[0012] The technical scheme described above in the embodiments of the present application has at least the following technical effects:

[0013] The high-pressure alarm low-temperature safety valve provided by the embodiments of the present application can set the valve cover at one end of the valve body with a valve cavity, movably pass the valve rod through the valve cover in the axial direction of the valve rod, locate one end of the valve rod in the valve cavity, protrude the other end of the valve rod from the one end of the valve cover away from the valve body, set the compensation cover with an air intake space and a gas storage space on the other end of the valve rod, locate the other end of the valve rod in the air intake space, and make the outside of the compensation cover one-way communicate with the air intake space. The air intake space one-way communicates with the gas storage space. When the valve is opened, the valve rod is frequently moved in the axial direction to push the air in the air intake space into the gas storage space, so as to increase the air pressure in the gas storage space and generate a force to prevent the valve rod from moving, thereby compensating for the decrease in spring force caused by the increase in temperature of the spring. In this way, the scheme is beneficial to maintain the opening pressure of the high-pressure alarm low-temperature safety valve stable, improve the safety and reliability of the pipeline, avoid the overflow and waste of the medium in the pipeline, prolong the service life of the equipment, reduce the maintenance frequency and maintenance demand of the valve, and effectively save the use cost.

[0014] In some embodiments, the compensation cover comprises:

[0015] The cover body is provided at one end of the valve cover away from the valve body; an opening is formed in the end of the cover body towards the valve body; and the valve rod is located in the opening;

[0016] The partition plate is provided in the cover body; the axis of the partition plate is collinear with the axis of the valve rod; the outer peripheral surface of the partition plate is attached to the inner side surface of the cover body; and the end surface of the partition plate away from the valve body, the inner side surface of the one end of the cover body away from the valve body, and the inner peripheral surface of the cover body jointly form the gas storage space;

[0017] a piston movably arranged in the cover along the axial direction of the valve stem and located on the side of the partition plate facing the valve body; one end of the piston facing the valve body is connected to the end of the valve stem protruding from the valve cover; the outer circumferential surface of the piston and the inner side surface of the cover slide against each other; the end surface of the piston facing the partition plate, the inner side surface of the cover and the end surface of the partition plate facing the piston together form the intake space;

[0018] an intake one-way valve arranged on the cover; the gas input end of the intake one-way valve is communicated with the outside of the cover; the gas output end of the intake one-way valve is communicated with the intake space; the intake one-way valve is used to make the gas outside the cover unidirectionally enter the intake space;

[0019] a gas delivery one-way valve arranged on the partition plate; the gas input end of the gas delivery one-way valve is communicated with the intake space; the gas output end of the gas delivery one-way valve is communicated with the gas storage space.

[0020] In some embodiments, the compensation cover further comprises an exhaust one-way valve arranged on the cover; the gas input end of the exhaust one-way valve is communicated with the gas storage space; the gas output end of the exhaust one-way valve is communicated with the outside of the cover; the maximum flow of the exhaust one-way valve is smaller than that of the gas delivery one-way valve; the exhaust one-way valve is used to exhaust the gas in the gas storage space.

[0021] In some embodiments, the compensation cover further comprises a flow regulating valve; the gas input end of the flow regulating valve is connected to the gas output end of the exhaust one-way valve; the flow regulating valve is used to regulate the speed of gas exhaust in the gas storage space.

[0022] In some embodiments, the partition plate is movable along the axial direction of the cover; the compensation cover further comprises:

[0023] a first connecting member movably arranged in the end surface of the compensation cover away from the valve body along the height direction of the compensation cover; one end of the first connecting member is connected to the partition plate; the other end of the first connecting member protrudes from the end surface of the compensation cover away from the valve body.

[0024] In some embodiments, the first connecting member is provided with a hollow space along the axial direction of the first connecting member; the first connecting member is provided with a first through hole at the end close to the partition plate; the first connecting member is provided with a second through hole at the end away from the partition plate; the first through hole is used to make the hollow space communicated with the gas storage space; the second through hole is used to make the hollow space communicated with the outside;

[0025] the compensation cover further comprises:

[0026] a plug movably arranged in the hollow space along the axial direction of the first connector; an outer circumferential surface of the plug being capable of sliding friction with the inner wall of the first connector; the plug being provided with a third through hole along the axial direction of the plug; the height of the plug being greater than the diameter of the first through hole;

[0027] a second connector connected to the plug away from the valve body; the other end of the second connector protruding from the end of the first connector away from the valve body;

[0028] a resilient member; one end of the resilient member being arranged on the inner side surface of the end of the first connector away from the valve body; the other end of the resilient member abutting against the end of the plug away from the valve body;

[0029] The resilient member is used to push the plug towards the valve body, so that the outer circumferential surface of the plug blocks the first through hole; the second connector is used to provide a hand holding position to pull out the plug away from the valve body, so that the gas storage space is communicated with the outside through the hollow space.

[0030] In a second aspect, the embodiments of the present application provide a control method of a high-pressure alarm low-temperature safety valve, which is applied to the high-pressure alarm low-temperature safety valve as described in the above embodiments; the high-pressure alarm low-temperature safety valve further comprises:

[0031] a first detection device arranged at the end of the compensation cover away from the valve body; the first detection device being used to detect the change trend of the gas pressure in the gas storage space;

[0032] an alarm device arranged on the valve cover;

[0033] a control device communicatively connected to the first detection device and the alarm device respectively; the control device being used to control the alarm device to send an alarm signal according to the detection result of the first detection device;

[0034] The control method of the high-pressure alarm low-temperature safety valve comprises:

[0035] the control device detects a first signal through the first detection device, acquires a first time stamp and starts timing to obtain a first time length variable;

[0036] the control device acquires a preset time period length value;

[0037] The control device stops timing when detecting that the first time length variable is equal to the preset time length value, counts the number of the first time stamps obtained during the timing process, and obtains a first time stamp number value;

[0038] The control device controls the alarm device to send an alarm signal according to the first time stamp number value.

[0039] The control method of the high-pressure alarm cryogenic safety valve provided by the embodiment can detect a first signal indicating the pressure rise in the gas storage space, start timing when the first signal is detected, obtain a preset time length value, determine the timing length, count the number of the first time stamps obtained during the timing process, and control the alarm device to send an alarm signal according to the first time stamp number value, which can accurately identify abnormal pressure conditions, is beneficial to early warning and risk prevention, improves the safety and reliability of the system, and enhances the intelligent level of the system.

[0040] In some embodiments, the high-pressure alarm cryogenic safety valve further includes a second detection device arranged at a gas input port of the gas inlet space; the second detection device is in communication connection with the control device; the second detection device is used to detect whether gas enters the gas inlet space; and the control method of the high-pressure alarm cryogenic safety valve further includes:

[0041] The control device detects a second signal through the first detection device and obtains a second time stamp;

[0042] The control device obtains a first time period according to the first time stamp and the second time stamp;

[0043] The control device detects a third signal through the second detection device and obtains a third time stamp;

[0044] The control device determines that no third signal is detected within the first time period and controls the alarm device to perform an alarm operation.

[0045] In some embodiments, the determination that no third signal is detected within the first time period and the control of the alarm device to perform an alarm operation include:

[0046] The control device records all the first time stamps, the second time stamps, and the third time stamps within the first time period in a time stamp data group;

[0047] The control device searches for the existence of the third time stamp in the time stamp data group and obtains a search result;

[0048] The control device controls the alarm device to perform the alarm operation according to the search result.

[0049] In some embodiments, the controlling the alarm device to send an alarm signal according to the first timestamp quantity value comprises:

[0050] The control device acquires an upper limit value of overpressure times;

[0051] The control device compares the first timestamp quantity with the upper limit value of overpressure times to obtain a comparison result;

[0052] The control device controls the alarm device to send an alarm signal according to the comparison result. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0054] Figure 1 The structure diagram of the high-pressure alarm low-temperature safety valve provided by the embodiments of the present application is shown.

[0055] Figure 2 The cross-sectional view of the high-pressure alarm low-temperature safety valve provided by the embodiments of the present application is shown.

[0056] Figure 3 The structure diagram of the compensation cover of the high-pressure alarm low-temperature safety valve provided by the embodiments of the present application is shown.

[0057] Figure 4 The structure diagram of the compensation cover of the high-pressure alarm low-temperature safety valve provided by the embodiments of the present application is shown.

[0058] Figure 5 The cross-sectional view of the compensation cover of the high-pressure alarm low-temperature safety valve provided by the embodiments of the present application is shown.

[0059] Figure 6 The flowchart of the control method of the high-pressure alarm low-temperature safety valve provided by the embodiments of the present application is shown.

[0060] Figure 7 The structure diagram of the control device of the high-pressure alarm low-temperature safety valve provided by the embodiments of the present application is shown.

[0061] In the drawings, various reference signs represent:

[0062] 100. A low temperature safety valve with high pressure alarm; 10. Valve body; 101. Valve cavity; 20. Valve cover, 30. Valve stem; 40. Compensating cover; 401. Inlet space; 402. Storage space; 403. Cover body; 404. Partition; 405. Piston; 406. Inlet check valve; 407. Gas delivery check valve; 408. Gas discharge check valve; 409. Flow regulating valve; 410. First connecting member; 4101. Hollow space; 4102. First through hole; 4103. Second through hole; 411. Blocking member; 412. Second connecting member; 413. Elastic member; 50. First detection device; 60. Second detection device; 70. Alarm device; 80. Control device; 90. Spring. DETAILED DESCRIPTION

[0063] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The description and the drawings of this application and the above-described drawing description are intended to cover all alternatives consistent with the principles of this application and are intended to include what is particularly pointed out in the claims.

[0065] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0066] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0067] In addition, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0068] In the present application, "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships; for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents an "or" relationship between the front and rear associated objects.

[0069] It should be noted that the words "in some embodiments", "exemplary", "for example" and the like in the present application are used to represent an example, illustration or description. Any embodiment or design scheme described as "in some embodiments", "exemplary", "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "in some embodiments", "exemplary", "for example" and the like is intended to present the relevant concept in a specific way, meaning that the specific features, structures or properties described in conjunction with the embodiments can be included in at least one embodiment of the present application. The appearance of the above words at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive or alternative to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0070] The safety valve in the related art determines the opening pressure of the safety valve by the elastic force of the spring. The safety valve is adjusted in the normal state of the spring at low temperature to determine the opening pressure of the safety valve, but the safety valve is frequently opened and closed in a short time, which can cause the temperature of the spring to rise and the elastic force to decrease, thereby causing the opening pressure of the safety valve to decrease and causing the medium to leak.

[0071] Based on this, in order to improve the technical problem that the safety valve in the related art is frequently opened and closed at low temperature to cause the spring to rise in temperature, the elastic force to decrease, the opening pressure to decrease, and the medium to leak, the embodiments of the present application provide the following solutions.

[0072] Please refer to Figure 1 , Figure 2 and Figure 5The embodiment of the present application provides a high-pressure alarm cryogenic safety valve 100, the high-pressure alarm cryogenic safety valve 100 includes a valve body 10, a valve cover 20, a valve stem 30, a spring 90 and a compensation cover 40, the valve body 10 has a valve cavity 101;The valve cover 20 is arranged at one end of the valve body 10;The valve stem 30 is movably arranged in the valve cover 20 along the direction of its own axis;The valve stem 30 is movably arranged in the valve cover 20 along the direction of its own axis;One end of the valve stem 30 is located in the valve cavity 101;The other end of the valve stem 30 protrudes from the one end of the valve cover 20 away from the valve body 10;The compensation cover 40 is arranged at the one end of the valve cover 20 away from the valve body 10;The compensation cover 40 has an air inlet space 401 and a gas storage space 402;The other end of the valve stem 30 is located in the air inlet space 401;The outside of the compensation cover 40 is unidirectionally communicated with the air inlet space 401;The air inlet space 401 is unidirectionally communicated with the gas storage space 402;

[0073] Wherein, the valve stem is used for opening the valve when the one end of the valve stem located in the valve cavity moves in the direction towards the valve cover, and moving the one end of the valve stem in the air inlet space in the direction away from the valve body to push the air in the air inlet space into the gas storage space;The gas storage space is used for storing gas to increase the air pressure in the gas storage space when the valve stem moves frequently to open and close the safety valve, and then increase the resistance received by the valve stem when moving towards the gas storage space.

[0074] It can be understood that the valve body 10 is a structure for bearing medium pressure, forming the valve cavity 101, and carrying parts, the valve body 110 also has a fluid input end and a fluid output end, the fluid input end is communicated with the valve cavity 101, and the valve cavity 101 is communicated with the fluid output end. The valve cover 20 is a structure for sealing the valve cavity 101 and mounting exposed components such as the spring 90. The valve stem 30 is an assembly including a stem body and a valve core, the stem body is used for transmitting driving force, and the valve core is used for abutting against a sealing element in the valve body 10, so as to cut off the communication between the fluid output end and the valve cavity. By moving the stem body, the valve core is driven to move to control the opening and closing of the valve. The part of the stem body protruding from the valve cavity is provided with a boss, one end of the spring 90 close to the valve body 10 abuts against the boss, and the other end of the spring 90 away from the valve body 10 is connected to the valve cover 20. The spring 90 is used for providing a pushing force towards the valve body 10 to make the valve stem 30 adhere to the valve seat, so that the valve is kept closed.

[0075] The compensation cover 40 is a component for providing resistance to the valve body 10 when the valve is frequently opened and closed and the spring 90 temperature rises to cause the spring force to decrease, so as to compensate for the reduced spring force of the spring 90, so that the valve needs to overcome the resistance of the spring 90 and the resistance generated by the compensation cover 40 to be able to be opened. The compensation cover 40 can be made of a metal material or a rubber material, but is not limited thereto. A plurality of one-way valves are arranged on the compensation cover 40 to respectively enable the fluid outside the compensation cover 40 to only enter the air inlet space 401 from the outside of the compensation cover 40, and enable the fluid in the air inlet space 401 to only enter the gas storage space 402 from the air inlet space 401. A gas outlet can be formed on the compensation cover 40, the gas storage space 402 is communicated with the outside through the gas outlet, so that the internally stored gas can be discharged, a valve capable of being manually opened and closed can be arranged at the gas outlet to control the gas discharge by manual control, or the caliber of the gas outlet can be adjusted to enable the internally stored gas to be automatically discharged at a preset flow rate, but is not limited thereto.

[0076] As can be seen from the above, the high-pressure alarm low-temperature safety valve 100 provided by the embodiment of the present application sets the valve cover 20 at one end of the valve body 10 having the valve cavity 101, movably penetrates the valve rod 30 along the axial direction of the valve rod 30 in the valve cover 20, so that one end of the valve rod 30 is located in the valve cavity 101 and the other end of the valve rod 30 protrudes from the valve cover 20 away from the one end of the valve body 10, and sets the compensation cover 40 having the air inlet space 401 and the gas storage space 402 on the other end of the valve rod 30, so that the other end of the valve rod 30 is located in the air inlet space 401 and the outside of the compensation cover 40 is one-way communicated with the air inlet space 401; the air inlet space 401 is one-way communicated with the gas storage space 402. When the valve is opened, the valve rod 30 is frequently moved along the axial direction of the valve rod 30 to push the air in the air inlet space 401 into the gas storage space 402, so that the air pressure in the gas storage space 402 is increased, thereby generating a force to prevent the movement of the valve rod 30, so as to compensate for the decrease of the spring force of the spring 90 caused by the temperature rise of the spring 90. In this way, the scheme is beneficial to maintain the opening pressure of the high-pressure alarm low-temperature safety valve 100 stable, improve the safety and reliability of the pipeline, avoid the overflow and waste of the medium in the pipeline, prolong the service life of the equipment, reduce the maintenance frequency and maintenance demand of the valve, and effectively save the use cost.

[0077] In some embodiments, referring to Figures 2 to 5 , the compensation cover 40 includes a cover body 403, a partition plate 404, a piston 405, an air inlet one-way valve 406, and a gas outlet one-way valve 407, one end of the cover body 403 is arranged at the end of the valve cover 20 away from the valve body 10; an opening is formed at the end of the cover body 403 facing the valve body 10; the valve rod 30 is located in the opening;

[0078] The partition plate 404 is arranged in the cover 403, and the outer circumferential surface of the partition plate 404 is attached to the inner side surface of the cover 403; the end surface of the partition plate 404 away from the valve body 10, the inner side surface of the end of the cover 403 away from the valve body 10, and the inner circumferential surface of the cover 403 jointly form the gas storage space 402;

[0079] The piston 405 is movably arranged in the cover 403 along the axial direction of the valve rod 30, and is located on the side of the partition plate 404 facing the valve body 10; the end of the piston 405 facing the valve body 10 is connected to the end of the valve rod 30 protruding from the valve cover 20; the outer circumferential surface of the piston 405 is in sliding fit with the inner side surface of the cover 403; the end surface of the piston 405 facing the partition plate 404, the inner side surface of the cover 403, and the end surface of the partition plate 404 facing the piston 405 jointly form the gas inlet space 401;

[0080] The gas inlet one-way valve 406 is arranged on the cover 403; the gas input end of the gas inlet one-way valve 406 is communicated with the outside of the cover 403; the gas output end of the gas inlet one-way valve 406 is communicated with the gas inlet space 401; the gas inlet one-way valve 406 is used for allowing the gas outside the cover 403 to enter the gas inlet space 401 in one direction;

[0081] The gas outlet one-way valve 407 is arranged on the partition plate 404; the gas input end of the gas outlet one-way valve 407 is communicated with the gas inlet space 401; the gas output end of the gas outlet one-way valve 407 is communicated with the gas storage space 402.

[0082] It can be understood that the cover 403 is a component with a hollow structure to form an internal space separated from the outside, and the cover 403 can be made of hard metal or plastic to fix the internal volume, or can be made of soft materials such as a bladder or a rubber airbag to make the internal volume variable, but is not limited thereto.

[0083] The partition plate 404 is a component for separating the internal space of the cover 403 into the gas inlet space 401 and the gas storage space 402, and the partition plate 404 can be made of the same material as the cover 403, and the partition plate 404 can be arranged in the cover 403 by means of gluing, welding, or integral molding, but is not limited thereto. The partition plate 404 is provided with a through hole to communicate the gas inlet space 401 and the gas storage space 402.

[0084] The piston 405 is a component for moving in the gas inlet space 401 to push the gas in the gas inlet space 401 into the gas storage space 402, and the outer circumferential surface of the piston 405 is in sliding friction with the inner side surface of the cover 403, and the outer circumferential surface of the piston 405 can be provided with a sealing ring or coated with rubber, but is not limited thereto.

[0085] The intake check valve 406 is located on the cover 403, allowing gas to enter the intake space 401 only from the outside. The intake check valve 406 can be an SMC check valve, model AKB04A or AKB06A, but is not limited to these. The delivery check valve 407 is located on the partition 404, allowing gas to enter the storage space 402 only from the intake space 401. The delivery check valve 407 can be a check valve of the same model as the intake check valve 406.

[0086] With this configuration, a cover 403, with an opening at one end facing the valve body 10, is positioned on the valve cover 20 at the end away from the valve body 10. This allows the cover 403 to fit over the end of the valve stem 30 that protrudes from the valve cover 20. A partition 404 is installed inside the cover 403. The end face of the partition 404 away from the valve body 10, the inner side of the end of the cover 403 away from the valve body 10, and the inner circumferential surface of the cover 403 together form an air storage space 402. This allows the piston 405 to move along the axis of the valve stem 30. A piston 405 is movably disposed within the cover 403, and is located on the side of the partition 404 facing the valve body 10. The end of the piston 405 facing the valve body 10 is connected to one end of the valve stem 30, allowing the piston 405 to move with the valve stem 30. The outer circumferential surface of the piston 405 slides and rubs against the inner surface of the cover 403. The end face of the piston 405 facing the partition 404, the inner surface of the cover 403, and the end face of the partition 404 facing the piston 405 together form an air intake space 401. An air intake one-way valve 406 is provided on the cover 403, allowing gas outside the cover 403 to enter the air intake space 401 in one direction. An air delivery one-way valve 407 is provided on the partition 404, allowing gas in the air intake space 401 to enter the gas storage space 402 in one direction. During valve opening, the valve stem 30 moves along its own axis toward the closed end of the cover 403, compressing the spring 90, which in turn drives the piston 405 toward the gas storage space 402. The piston 405 compresses the air intake space 401, pushing the gas in the air intake space 401 into the gas storage space 402 through the gas delivery check valve 407. During valve closing, under the action of the spring 90, the valve stem 30 moves away from the closed end of the cover 403 along its own axis, driving the piston 405 away from the gas storage space 402, expanding the air intake space 401, and drawing air from outside the cover 403 into the air intake space 401 through the air intake check valve 406. This allows the gas to flow orderly within the compensating cover 40, optimizing valve operation, facilitating smooth movement of the valve stem 30, and thus ensuring smooth valve opening and closing. This shortens the valve response time, allows for timely valve opening and closing, improves valve safety and reliability, and extends valve service life.

[0087] In some embodiments, please refer to Figures 2 to 5The compensation cover 40 also includes an exhaust check valve 408, which is disposed on the cover body 403. The gas input end of the exhaust check valve 408 is connected to the gas storage space 402. The gas output end of the exhaust check valve 408 is connected to the outside of the cover body 403. The maximum flow rate of the exhaust check valve 408 is less than the maximum flow rate of the gas supply check valve 407. The exhaust check valve 408 is used to discharge the gas in the gas storage space 402.

[0088] It is understood that the exhaust check valve 408 is a component used to allow gas in the gas storage space 402 to be discharged unidirectionally to the outside of the compensation cover 40. The exhaust check valve 408 can be a check valve of the brand SMC, model AK2000-01 or AK2000-02, but is not limited to these. The maximum flow rate of the exhaust check valve 408 is less than the maximum flow rate of the gas supply check valve 407, so that the gas in the gas storage space 402 is discharged to the outside of the compensation cover 40 at a slower speed than the gas in the intake space 401 is input to the gas storage space 402. When the valve is frequently opened and closed, the gas pressure in the gas storage space 402 can gradually increase.

[0089] With this configuration, the exhaust check valve 408 is placed on the cover 403. The gas inlet of the exhaust check valve 408 is connected to the gas storage space 402, and the gas outlet of the exhaust check valve 408 is connected to the outside of the cover 403. This allows the gas in the gas storage space 402 to be discharged unidirectionally to the outside of the cover 403, preventing the gas from accumulating continuously in the gas storage space 402 and generating unsuitable compensating resistance. During the full opening of the valve, the gas in the intake space 401 enters the storage space 402 at a faster rate than the gas in the storage space 402 exits the compensation cover 40. This allows the gas to remain in the storage space 402 during frequent valve opening and closing, increasing the gas pressure within the storage space 402. This, in turn, increases the resistance of the piston 405 in pushing the gas into the storage space 402, increasing the resistance to the movement of the valve stem 30 toward the closed end of the compensation cover 40. This compensates for the spring force of the spring 90. The exhaust check valve 408 prevents excessive pressure within the storage unit from preventing the valve stem 30 from moving. Simultaneously, it dynamically adjusts the resistance to the valve stem 30, reducing valve vibration and impact caused by pressure fluctuations. This enhances the stability and reliability of the valve operation, maintains the valve's sealing performance during frequent opening and closing, and facilitates the automation of the compensation cover 40, reducing the need for manual maintenance. This improves valve safety, prevents media leakage, and helps ensure the normal operation of the system.

[0090] In some embodiments, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5The compensation cover 40 also includes a flow regulating valve 409; the gas input end of the flow regulating valve 409 is connected to the gas output end of the exhaust check valve 408; the flow regulating valve 409 is used to regulate the speed at which gas is discharged from the gas storage space 402.

[0091] It is understood that the flow regulating valve 409 is a component used to regulate the gas discharge rate from the gas storage space 402. For example, the flow regulating valve 409 can be a pneumatic speed control valve of brand SMC, model AS1201F or AS1002F, but is not limited to these. The flow regulating valve 409 can be connected to the exhaust check valve 408 through a gas pipe, or through a pipe adapter, but is not limited to these connections.

[0092] This configuration, connecting the gas input end of the flow regulating valve 409 to the gas output end of the exhaust check valve 408, allows for precise adjustment of the gas discharge rate within the gas storage space 402. By controlling the gas discharge rate within the gas storage space 402, the required movement frequency of the valve stem 30 when the compensation cover 40 creates resistance to the valve stem 30 can be adjusted according to actual usage needs. This adjusts the sensitivity of the compensation cover 40 in compensating for the resistance of the valve stem 30, effectively optimizing the performance of the high-pressure alarm cryogenic safety valve 100, improving its controllability, enhancing its safety, and extending its service life.

[0093] In some embodiments, please refer to Figure 2 and Figure 5 The partition 404 can move along the axial direction of the cover 403; the compensation cover 40 also includes a first connector 410, which is movably inserted through the end face of the compensation cover 40 away from the valve body 10 along the height direction of the compensation cover 40; one end of the first connector 410 is connected to the partition 404; the other end of the first connector 410 protrudes from the end face of the compensation cover 40 away from the valve body 10.

[0094] It is understood that the partition 404 moves along the axial direction of the cover 403 through sliding friction between its outer peripheral surface and the inner wall of the cover 403. The first connecting member 410 is a component used to connect the partition 404 and to drive the partition 404 to move along the axial direction of the cover 403. The first connecting member 410 can be a rigid rod or a soft rope such as a hose, but is not limited thereto. The other end of the first connecting member 410 protruding from the compensation cover 40 can be provided with a handle, so that the partition 404 can be driven to move by manually driving the first connecting member 410. For example, the handle can be a ball, nut, hook, etc., but is not limited thereto; or a driving member can be provided on the outer end face of the cover 403 away from the valve body 10, so that the partition 404 can be driven to move by winding the first connecting member 410 in the direction away from the valve body 10 or by pushing the first connecting member 410 in the direction toward the valve body 10, but is not limited thereto.

[0095] This configuration allows the partition 404 to move along the axial direction of the cover 403. The first connecting member 410 is movably inserted through the end face of the compensation cover 40 away from the valve body 10 along the height direction of the compensation cover 40. One end of the first connecting member 410 is connected to the partition 404, and the other end of the first connecting member 410 protrudes from the end face of the compensation cover 40 away from the valve body 10. By driving the other end of the first connecting member 410 to move, the partition 404 can be driven to move along the axial direction of the cover 403, thereby adjusting the volume of the gas storage space 402. This changes the frequency at which the valve opening and closing causes the compensation cover 40 to generate compensation resistance, making the sensitivity of the compensation resistance generated by the compensation cover 40 controllable. This improves the flexibility and applicability of the compensation cover 40, reduces the operational difficulty of the low-temperature safety valve 100 with high-pressure alarm, improves the convenience of adjusting the low-temperature safety valve 100 with high-pressure alarm, facilitates maintenance and replacement, and reduces maintenance costs and complexity.

[0096] In some embodiments, please refer to Figure 2 and Figure 5 The first connector 410 has a hollow space 4101 along its own axis; the first connector 410 has a first through hole 4102 at the end near the partition 404; the first connector 410 has a second through hole 4103 at the end away from the partition 404; the first through hole 4102 is used to connect the hollow space 4101 to the gas storage space 402; the second through hole 4103 is used to connect the hollow space 4101 to the outside.

[0097] The compensation cover 40 also includes a plug 411, a second connector 412, and an elastic member 413. The plug 411 is movably disposed within the hollow space 4101 along the axial direction of the first connector 410; the outer peripheral surface of the plug 411 can slide and rub against the inner wall of the first connector 410; the plug 411 has a third through hole along its own axial direction; the height of the plug 411 is greater than the diameter of the first through hole 4102. The second connector 412 is connected to the end of the plug 411 away from the valve body 10; the other end of the second connector 412 protrudes from the end of the first connector 410 away from the valve body 10. One end of the elastic member 413 is disposed on the inner side of the end of the first connector 410 away from the valve body 10; the other end of the elastic member 413 abuts against the end of the plug 411 away from the valve body 10.

[0098] Among them, the elastic member 413 is used to push the blocking member 411 toward the valve body 10 so that the outer peripheral surface of the blocking member 411 blocks the first through hole 4102; the second connecting member 412 is used to provide a hand position to pull the blocking member 411 out in a direction away from the valve body 10, so that the gas storage space 402 is connected to the outside through the hollow space 4101.

[0099] It can be understood that the plug 411 is a component used to move along the axial direction of the first connector 410 toward the partition 404 to block the first through hole 4102, or to move in a direction away from the partition 404 so that the first through hole 4102 is connected to the second through hole 4103 through the third through hole, thereby venting the gas in the gas storage space 402. The outer peripheral surface of the plug 411 can slide and rub against the inner wall of the first connector 410, and the height of the plug 411 is greater than the diameter of the first through hole 4102 to provide a seal to block the first through hole 4102.

[0100] The second connector 412 is a component used to drive the blockage component 411 to move. The second connector 412 can be a rigid rod or a flexible hose, but is not limited to these.

[0101] The elastic element 413 is a component used to push the blocking element 411 toward the partition 404. The elastic element 413 may be a coil spring or a disc spring assembly, but is not limited to these.

[0102] With this configuration, a hollow space 4101 is opened along the first connector 410, and a first through hole 4102 is opened at the end of the first connector 410 near the partition 404, and a second through hole 4103 is opened at the end of the first connector 410 away from the partition 404. A plug 411 that can move along the axial direction of the first connector 410 is provided in the hollow space 4101. The outer peripheral surface of the plug 411 slides and rubs against the inner wall of the first connector 410. The height of the plug 411 is greater than the diameter of the first through hole 4102, so as to seal the first through hole 4102. One end of the second connector 412 is connected to the blocking member 411, and the other end of the second connector 412 protrudes from one end of the first connector 410. One end of the compressed elastic member 413 is positioned on the inner side of the end of the first connector 410 away from the valve body 10, and the other end of the elastic member 413 abuts against the end of the blocking member 411 away from the valve body 10, allowing the elastic member 413 to extend and apply a thrust toward the valve body 10 to the blocking member 411, pushing the blocking member 411 toward the partition 404. In an emergency requiring a rapid reduction in the pressure within the gas storage space 402, the operator can pull up the blocking member 411 to quickly expel the gas from the gas storage space 402, thereby rapidly reducing the pressure within the gas storage space 402, reducing the compensation pressure of the compensation cover 40 on the valve stem 30, preventing equipment damage or safety accidents caused by excessive pressure, improving the safety and reliability of the high-pressure alarm cryogenic safety valve 100, and increasing operational flexibility. The simple structure facilitates the maintenance and debugging of the high-pressure alarm cryogenic safety valve 100.

[0103] Please see Figure 6 This application also provides a control method for a cryogenic safety valve with high pressure alarm. The control method for a cryogenic safety valve with high pressure alarm provided in this application can be applied to a cryogenic safety valve 100 with high pressure alarm. In this case, the cryogenic safety valve 100 with high pressure alarm is the executing subject of the control method for the cryogenic safety valve with high pressure alarm provided in this application. This application does not impose any restrictions on the specific type of cryogenic safety valve 100 with high pressure alarm.

[0104] For example, please see Figures 1 to 5 ,as well as Figure 7The cryogenic safety valve 100 with high-pressure alarm as described in the above embodiment further includes a first detection device 50, a second detection device 60, an alarm device 70, and a control device 80. The first detection device 50 is disposed at the end of the compensation cover 40 away from the valve body 10. The first detection device 50 is used to detect the changing trend of gas pressure in the gas storage space 402. The second detection device 60 is disposed at the gas inlet of the air inlet space 401. The alarm device 70 is disposed on the valve cover 20. The control device 80 is communicatively connected to the first detection device 50, the second detection device 60, and the alarm device 70. The control device 80 is used to control the alarm device 70 to issue an alarm signal based on the detection results of the first detection device 50 and the second detection device 60.

[0105] It is understood that the first detection device 50 is a component used to detect the trend of air pressure change within the air storage space 402. For example, the first detection device 50 may include a barometer and a camera. The gas input port of the barometer is connected to the air storage space 402, and the camera captures images of the surface of the barometer in real time. The direction of rotation of the barometer pointer is identified by an image processing algorithm to determine the trend of air pressure change within the air storage space 402. Alternatively, the first detection device 50 may use a pressure sensor. The gas input terminal of the pressure sensor is connected to the air storage space 402, and the trend of air pressure change within the air storage space 402 is determined based on the signal output by the pressure sensor. However, it is not limited to these methods.

[0106] The second detection device 60 is a component used to detect whether gas has entered the intake space 401. For example, the second detection device 60 can be a gas flow meter, with the gas output end of the gas flow meter connected to the intake check valve 406. When gas enters the intake check valve 406 through the gas flow meter and is then input into the intake space 401, the gas flow meter can send a signal. Alternatively, a pressure sensor can be used, with the gas input end of the pressure sensor connected to the intake space 401 to detect pressure changes in the intake space 401. Based on the pressure changes in the intake space 401, for example, if the pressure in the intake space 401 recovers from negative pressure to normal pressure, it can be determined that gas has entered the intake space 401 through the intake check valve 406, but it is not limited to this.

[0107] The alarm device 70 is a device used to emit alarm signals. The alarm device 70 can emit sound signals, light signals, etc., but is not limited to these.

[0108] The control device 80 is used to receive, process, and send information to control connected components to perform operations according to a preset program. The control device 80 can be installed on the valve body 10, on the valve cover 20, or beside the valve body 10, but is not limited to these locations. The control device 80 can be a microcontroller, PLC, central processing unit, or other computing device, but is not limited to these.

[0109] With this configuration, the first detection device 50 is positioned at the end of the compensation cover 40 furthest from the valve body 10 to detect the pressure change trend within the gas storage space 402. The second detection device 60 is positioned at the gas inlet of the air inlet space 401 to detect whether gas has entered the air inlet space 401. The alarm device 70 is positioned on the valve cover 20. The control device 80 is communicatively connected to the first detection device 50, the second detection device 60, and the alarm device 70 to control the alarm device 70 to issue an alarm signal based on the detection results of the first detection device 50 and the second detection device 60. Through the first detection device 50 and the second detection device 60, the working status of the compensation cover 40 can be detected in real time without affecting the operation of the pipeline system. This facilitates the timely detection of faults in the system, improves the reliability of the high-pressure alarm cryogenic safety valve 100 and the safety of the pipeline system, reduces losses caused by abnormal situations, and reduces maintenance costs.

[0110] To better understand the control method of the cryogenic safety valve with high pressure alarm provided in the embodiments of this application, the specific implementation process of the control method of the cryogenic safety valve with high pressure alarm provided in the embodiments of this application will be described by way of example below.

[0111] Figure 6 A schematic flowchart of a control method for a cryogenic safety valve with high-pressure alarm provided in an embodiment of this application is shown. The control method for the cryogenic safety valve with high-pressure alarm includes:

[0112] S100, the first signal is detected, the first timestamp is obtained and the timer is started, and the first duration variable is obtained.

[0113] It can be understood that the first signal indicates an increase in gas pressure within the gas storage space 402. This first signal can indicate that the cryogenic safety valve 100, triggering a high-pressure alarm, has opened, or that the pressure within the pipeline system exceeds a preset pressure limit. When the first detection device 50 detects an increase in gas pressure within the gas storage space 402, it sends the first signal to the control device 80. The first timestamp indicates the moment the control device 80 receives the first signal. The first timestamp can be a time determined based on the device's own time or a time determined based on local time, but is not limited to either. The first duration variable is used to represent the duration of the timekeeping, and this first duration variable changes in real time.

[0114] S200, obtain the preset time period length value;

[0115] It is understood that the preset time period length represents the duration for data collection and monitoring. The preset time period length can be set by user input, or a lookup table can be pre-established based on factors such as the operating environment, medium temperature, and medium type. For example, "pipeline pressure: 3MPa; preset time period length: 10 seconds," or "medium temperature: -80°C; preset time period length: 30 seconds," but not limited to these. It should be noted that the values ​​given above do not represent actual data; they are only set for ease of understanding. Specific data needs to be determined based on actual conditions, which will not be elaborated upon here.

[0116] S300, when the first duration variable is detected to be equal to the preset time period length value, stop timing, count the number of first timestamps obtained during the timing process, and obtain the first timestamp count value;

[0117] It is understandable that real-time detection of the first duration variable can compare it with a preset time period length value in real time to determine whether the first duration variable is equal to the preset time period length value; or it can calculate the difference between the first duration variable and the preset time period length value in real time, and determine that the first duration variable is equal to the preset time period length value when the difference is zero, but it is not limited to these methods. The first timestamp count value indicates the number of times the first signal is detected during the timing process, and can also indicate the number of times the pressure in the pipeline system exceeds the preset pressure limit.

[0118] S400, based on the first timestamp value, controls the alarm device 70 to issue an alarm signal.

[0119] It is understandable that an upper limit for the number of first timestamps can be preset to determine the maximum number of times the pressure in the pipeline system exceeds the preset pressure limit during the timing process. The number of first timestamps is compared with the upper limit, and the alarm device 70 is controlled to issue an alarm signal based on the comparison result.

[0120] As can be seen from the above, the control method of the low-temperature safety valve for high-pressure alarm provided in this application embodiment detects a first signal indicating an increase in gas pressure in the gas storage space 402, starts timing when the first signal is detected, obtains a preset time period length value, determines the duration of timing, counts the number of first timestamps obtained during the timing process, and controls the alarm device 70 to issue an alarm signal based on the number of first timestamps. This method can accurately identify abnormal pressure conditions, which is beneficial for early warning and risk prevention, improves the safety and reliability of the system, and enhances the intelligence level of the system.

[0121] In some embodiments, S400, based on the first timestamp quantity value, controlling the alarm device 70 to issue an alarm signal includes:

[0122] S410, obtain the maximum number of overpressure cycles;

[0123] It is understood that the upper limit of overpressure counts is used to indicate the maximum number of times the pressure in the pipeline system exceeds the preset pressure limit during the timing process. The upper limit of overpressure counts can be set by user input, or a lookup table can be pre-established based on factors such as the operating environment, medium temperature, and medium type. For example, "Pipeline pressure: 3MPa; Upper limit of overpressure counts: 30%", or "Medium temperature: -80°C; Upper limit of overpressure counts: 3 times", but it is not limited to these. It should be noted that the values ​​given above do not represent actual data; they are only set for ease of understanding. Specific data needs to be determined based on actual conditions, which will not be elaborated upon here.

[0124] S420, compare the first timestamp quantity with the upper limit of overpressure times to obtain the comparison results;

[0125] It is understandable that a comparison result can be obtained by calculating the first timestamp quantity and the upper limit of overpressure times. For example, the difference between the first timestamp quantity and the upper limit of overpressure times can be calculated and the difference can be used as the comparison result; or the ratio between the first timestamp quantity and the upper limit of overpressure times can be calculated and the ratio can be used as the comparison result, but it is not limited to these.

[0126] S430, based on the comparison results, control the alarm device 70 to issue an alarm signal.

[0127] It is understandable that, depending on the comparison results, the alarm device 70 can be controlled to issue different alarm signals. For example, when the ratio of the first timestamp quantity to the upper limit of the overpressure number is used as the comparison result, if the first timestamp quantity exceeds 50% of the upper limit of the overpressure number, the alarm device 70 can be controlled to issue both an audible alarm signal and a visual alarm signal; or if the first timestamp quantity is less than the upper limit of the overpressure number, the alarm device 70 can be controlled to issue a green light alarm signal to indicate that the pipeline system pressure is normal, but this is not limited to these.

[0128] By setting it up in this way, the upper limit of the number of overpressure times is obtained, and the first timestamp number is compared with the upper limit of the number of overpressure times to obtain the comparison result. Based on the comparison result, the alarm device 70 is controlled to issue an alarm signal, which can accurately monitor the overpressure situation in the pipeline system, provide timely warnings and take risk prevention measures, effectively improve the reliability of the low temperature safety valve 100 with high pressure alarm, avoid false alarms and missed alarms from manual inspection, and improve the safety of the pipeline system.

[0129] In some embodiments, the control method for the cryogenic safety valve with high-pressure alarm further includes:

[0130] S10, the second signal was detected, and the second timestamp was obtained.

[0131] It can be understood that the second signal is a signal indicating that the pressure inside the gas storage space 402 has returned to the same level as the pressure outside the low-temperature safety valve 100 that triggered the high-pressure alarm. For example, the second signal could be a signal issued by the first detection device when it detects that the pressure inside the gas storage space has dropped to a preset value, or it could be a signal issued by the first detection device when it detects that the gas pressure inside the gas storage space has remained constant for a period of time, but it is not limited to these. The second timestamp indicates the moment when the control device 80 receives the second signal, and the second timestamp is acquired in the same way as the first timestamp.

[0132] S20, the first time period is obtained based on the first timestamp and the second timestamp.

[0133] It can be understood that the first time period refers to the interval between the first timestamp acquired initially and the second timestamp acquired initially. The duration of the first time period can be adjusted by adjusting the position of the exhaust check valve 408 or the baffle 404 of the cryogenic safety valve 100 of the high-pressure alarm.

[0134] S30, a third signal was detected, and a third timestamp was obtained.

[0135] It can be understood that the third signal is a signal indicating that fluid has entered the air intake space 401. The third timestamp indicates the moment when the control device 80 receives the third signal, and the third timestamp is acquired in the same way as the first timestamp.

[0136] S40, after determining that no third signal was detected during the first time period, controls the alarm device 70 to perform an alarm operation.

[0137] It is understandable that if no third signal is detected in the first time period, it means that from the initial detection of fluid entering the gas storage space 402 and increasing the pressure in the gas storage space 402, until the gas pressure in the gas storage space 402 returns to the same as the pressure outside the high-pressure alarm cryogenic safety valve 100, no fluid enters the air intake space 401. That is, the high-pressure alarm cryogenic safety valve 100 remains open in the first time period, the overpressure duration of the high-pressure alarm cryogenic safety valve 100 exceeds the duration of the first time period, and the pressure in the pipeline system continues to be maintained in the overpressure state.

[0138] This setup, by detecting the second signal and obtaining the second timestamp, determines the first time period based on the first and second timestamps. If no third signal is detected within the first time period, the alarm device 70 is controlled to perform an alarm operation. In this way, without affecting the operation of the cryogenic safety valve 100 under high pressure alarm, it can be determined that the cryogenic safety valve 100 under high pressure alarm remains open within the first time period. If the overpressure duration of the cryogenic safety valve 100 under high pressure alarm exceeds the duration of the first time period, an alarm will be issued in a timely manner, thereby improving the safety of the pipeline system, avoiding false alarms and missed alarms caused by accidental pressure fluctuations, helping operators better understand the operating status of the system, promptly discover potential problems, and enhance the intelligence level of the system.

[0139] In some embodiments, S40, if it is determined that no third signal is detected within the first time period, the alarm device 70 is controlled to perform an alarm operation, including:

[0140] S41 records all first, second, and third timestamps within the first time period in the timestamp data group.

[0141] It is understandable that a timestamp data group is a database used for storage and easy retrieval. All first, second, and third timestamps within the first time period can be directly recorded in the timestamp data group, or the first, second, and third timestamps can be marked separately, for example, the first timestamp can be marked as "1", the second timestamp as "2", and the third timestamp as "3", and only each mark can be stored in the timestamp data group, but it is not limited to this.

[0142] S42, search for the existence of a third timestamp within the timestamp data group to obtain the search results.

[0143] It is understandable that, based on the third timestamp or its marker, a match is performed within the timestamp data group to determine the existence of the third timestamp, thereby obtaining the search results.

[0144] S43, Based on the search results, control the alarm device 70 to perform an alarm operation.

[0145] This configuration records all first, second, and third timestamps within the first time period in a timestamp data group. By searching for the existence of the third timestamp within the timestamp data group, the search results can be obtained. This facilitates the quick and accurate determination of whether a third signal has been detected within the first time period, thereby quickly and accurately determining whether an alarm signal should be issued, effectively improving the reliability and security of the system.

[0146] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0147] Corresponding to the control method of the cryogenic safety valve with high pressure alarm described in the above embodiments, this application embodiment also provides a control system for the cryogenic safety valve 100 with high pressure alarm. Each unit of the system can realize each step of the control method of the cryogenic safety valve with high pressure alarm.

[0148] The system includes:

[0149] The detection unit is used to detect the first signal, obtain the first timestamp and start timing to obtain the first duration variable;

[0150] The acquisition unit is used to acquire the preset time period length value;

[0151] The determining unit is used to stop timing when it detects that the first duration variable is equal to the preset time period length value, and to count the number of the first timestamps obtained during the timing process to obtain the first timestamp count value.

[0152] An execution unit is used to control the alarm device 70 to issue an alarm signal based on the first timestamp quantity value.

[0153] It should be noted that the information interaction and execution process between the above-mentioned units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, which will not be repeated here.

[0154] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units is merely an example. In practical applications, the above functions can be assigned to different functional units as needed, that is, the internal structure of the system can be divided into different functional units to complete all or part of the functions described above. The functional units in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0155] Please see Figure 7This application embodiment also provides a cryogenic safety valve 100 with high-pressure alarm. The cryogenic safety valve 100 with high-pressure alarm includes a control device 80. The control device 80 includes at least one processor 81, at least one memory 82, and a computer program 83 stored in the at least one memory 82 and executable on the at least one processor 81. When the processor 81 executes the computer program 83, it causes the control device 80 to implement the steps in the embodiments of the control methods for cryogenic safety valves with high-pressure alarm described above.

[0156] Exemplarily, the computer program 83 may be divided into one or more units, which are stored in the memory 82 and executed by the processor 81 to complete this application. The one or more units may be a series of computer program 83 instruction segments capable of performing a specific function, which describe the execution process of the computer program 83 in the automotive fan motor detection device.

[0157] The control device 80 can be a microcontroller, PLC, central processing unit, or other computing device. The control device 80 may include, but is not limited to, a processor 81 and a memory 82. Those skilled in the art will understand that the control device 80 may include more or fewer components, or a combination of certain components, or different components; for example, it may also include input / output devices, network access devices, buses, etc.

[0158] The processor 81 can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor, or the processor 81 can be any conventional processor.

[0159] In some embodiments, the memory 82 may be an internal storage unit of the control device 80, such as a hard disk or memory of the control device 80. In other embodiments, the memory 82 may be an external storage device of the control device 80, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the control device 80. Furthermore, the memory 82 may include both internal storage units and external storage devices of the control device 80. The memory 82 is used to store the operating system, applications, bootloader, data, and other programs, such as the program code of the computer program 83. The memory 82 can also be used to temporarily store data that has been output or will be output.

[0160] This application also provides a computer-readable storage medium storing a computer program 83, which, when executed by a processor 81, implements the steps in any of the above method embodiments.

[0161] This application provides a computer program 83 product that, when running on a high-pressure alarm cryogenic safety valve 100, causes the high-pressure alarm cryogenic safety valve 100 to perform the steps in any of the above-described method embodiments.

[0162] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can be implemented by a computer program 83 instructing related hardware. The computer program 83 can be stored in a computer-readable storage medium, and when executed by the processor 81, it can implement the steps of the various method embodiments described above. The computer program 83 includes computer program 83 code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable medium can include at least: any entity or device capable of carrying the computer program 83 code to the high-pressure alarm cryogenic safety valve 100, a recording medium, a computer memory 82, a read-only memory 82 (ROM), a random access memory 82 (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, such as a USB flash drive, a portable hard drive, a magnetic disk, or an optical disk.

[0163] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0164] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0165] In the embodiments provided in this application, it should be understood that the disclosed high-pressure alarm cryogenic safety valve 100 and its control method can be implemented in other ways. For example, the embodiments of the high-pressure alarm cryogenic safety valve 100 described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0166] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0167] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cryogenic safety valve with high-pressure alarm, characterized in that, include: Valve body, the valve body having a valve cavity; A valve cover, wherein the valve cover is disposed at one end of the valve body; A valve stem, which is movably inserted through the valve cover along its own axis; one end of the valve stem is located inside the valve cavity; the other end of the valve stem protrudes from the valve cover at the end away from the valve body; A spring is sleeved on the other end of the valve stem; the end of the spring away from the valve body abuts against the valve cover; the spring is used to push the end of the valve stem located in the valve cavity in a direction away from the valve cover to close the valve. A compensation cover is disposed at the end of the valve cover away from the valve body; the compensation cover has an air inlet space and an air storage space; the other end of the valve stem is located in the air inlet space; the outside of the compensation cover is unidirectionally connected to the air inlet space; the air inlet space is unidirectionally connected to the air storage space; The valve stem is used to open the valve when one end of the valve stem located in the valve cavity moves toward the valve cover, and to move one end of the valve stem in the air intake space toward a direction away from the valve body to push the air in the air intake space into the air storage space. The gas storage space is used to store gas to increase the gas pressure in the gas storage space when the valve stem moves frequently to open and close the safety valve, thereby increasing the resistance received by the valve stem when it moves toward the gas storage space.

2. The cryogenic safety valve with high-pressure alarm as described in claim 1, characterized in that, The compensation cover includes: A cover body, one end of which is located at the end of the valve cover away from the valve body; the end of the cover body facing the valve body has an opening; the valve stem is located inside the opening; A partition is disposed within the cover body; the outer peripheral surface of the partition is attached to the inner surface of the cover body; the end face of the partition away from the valve body, the inner surface of the end of the cover away from the valve body, and the inner peripheral surface of the cover body together form the gas storage space; A piston is movably disposed within the cover body along the axial direction of the valve stem and is located on the side of the partition facing the valve body; one end of the piston facing the valve body is connected to one end of the valve stem protruding from the valve cover; the outer peripheral surface of the piston slides and rubs against the inner surface of the cover body; the end face of the piston facing the partition body, the inner surface of the cover body, and the end face of the partition body facing the piston together form the air intake space; An air intake check valve is disposed on the cover; the gas input end of the air intake check valve is connected to the outside of the cover; the gas output end of the air intake check valve is connected to the air intake space; the air intake check valve is used to allow gas outside the cover to enter the air intake space in one direction. A gas delivery check valve is disposed on the partition; the gas input end of the gas delivery check valve is connected to the gas inlet space; the gas output end of the gas delivery check valve is connected to the gas storage space.

3. The cryogenic safety valve with high-pressure alarm as described in claim 2, characterized in that, The compensation cover also includes an exhaust check valve, which is disposed on the cover body; the gas input end of the exhaust check valve is connected to the gas storage space; the gas output end of the exhaust check valve is connected to the outside of the cover body; the maximum flow rate of the exhaust check valve is less than the maximum flow rate of the gas supply check valve; the exhaust check valve is used to discharge the gas in the gas storage space.

4. The cryogenic safety valve with high-pressure alarm as described in claim 3, characterized in that, The compensation cover also includes a flow regulating valve; the gas input end of the flow regulating valve is connected to the gas output end of the exhaust check valve; the flow regulating valve is used to regulate the speed at which gas is discharged from the gas storage space.

5. The cryogenic safety valve with high-pressure alarm as described in claim 2, characterized in that, The partition is movable along the axial direction of the cover; the compensation cover further includes: A first connector is movably disposed along the height direction of the compensation cover on the end face of the compensation cover away from the valve body; one end of the first connector is connected to the partition; the other end of the first connector protrudes from the end face of the compensation cover away from the valve body.

6. The cryogenic safety valve with high-pressure alarm as described in claim 5, characterized in that, The first connector has a hollow space along its own axis; the first connector has a first through hole at the end near the partition; the first connector has a second through hole at the end away from the partition; the first through hole is used to connect the hollow space to the gas storage space; The second through hole is used to connect the hollow space to the outside; The compensation cover also includes: A plugging component is movably disposed within the hollow space along the axial direction of the first connecting component; the outer peripheral surface of the plugging component is capable of sliding friction with the inner wall of the first connecting component; the plugging component has a third through hole along its own axial direction; the height of the plugging component is greater than the diameter of the first through hole. A second connector is connected to the end of the plugging member away from the valve body; the other end of the second connector protrudes from the end of the first connector away from the valve body. An elastic element, one end of which is disposed on the inner side of the first connecting member away from the valve body; the other end of which abuts against the end of the blocking member away from the valve body; The elastic member is used to push the blocking member toward the valve body so that the outer peripheral surface of the blocking member blocks the first through hole; the second connecting member is used to provide a hand position to pull the blocking member out in a direction away from the valve body, so that the gas storage space is connected to the outside through the hollow space.

7. A control method for a cryogenic safety valve with high-pressure alarm, characterized in that, A cryogenic safety valve for high-pressure alarm as described in any one of claims 1 to 6; the cryogenic safety valve for high-pressure alarm further includes: A first detection device is disposed at the end of the compensation cover away from the valve body; the first detection device is used to detect the changing trend of gas pressure in the gas storage space. An alarm device is provided on the valve cover; A control device is communicatively connected to both the first detection device and the alarm device; the control device is used to control the alarm device to issue an alarm signal based on the detection result of the first detection device. The control method for the cryogenic safety valve with the high-pressure alarm includes: The control device detects the first signal through the first detection device, obtains the first timestamp and starts timing, and obtains the first duration variable; The control device acquires a preset time period length value; When the control device detects that the first duration variable is equal to the preset time period length value, it stops timing, counts the number of the first timestamps obtained during the timing process, and obtains the first timestamp count value. The control device controls the alarm device to issue an alarm signal based on the first timestamp count.

8. The control method for the cryogenic safety valve with high-pressure alarm as described in claim 7, characterized in that, The low-temperature safety valve with high-pressure alarm also includes a second detection device, which is located at the gas inlet of the air intake space. The second detection device is communicatively connected to the control device; The second detection device is used to detect whether gas enters the intake space; the method further includes: The control device detects the second signal through the first detection device and obtains the second timestamp; The control device obtains the first time period based on the first timestamp and the second timestamp; The control device detects the third signal through the second detection device and obtains the third timestamp; The control device determines that no third signal is detected during the first time period, and controls the alarm device to perform an alarm operation.

9. The control method for the cryogenic safety valve with high-pressure alarm as described in claim 8, characterized in that, The step of determining that no third signal was detected during the first time period and controlling the alarm device to perform an alarm operation includes: The control device records all the first timestamps, second timestamps and third timestamps within the first time period in the timestamp data group; The control device searches for the existence of the third timestamp within the timestamp data group and obtains the search result. The control device controls the alarm device to perform the alarm operation based on the search results.

10. The control method for the cryogenic safety valve with high-pressure alarm as described in claim 7, characterized in that, The step of controlling the alarm device to issue an alarm signal based on the first timestamp count includes: The control device acquires the upper limit value for the number of overpressure cycles; The control device compares the first timestamp count with the upper limit of the overpressure count to obtain a comparison result; Based on the comparison results, the control device controls the alarm device to issue an alarm signal.

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