Low-temperature pump safety valve

Abstract

The utility model discloses a safety valve of a low-temperature pump, relates to the field of low-temperature pumps, solves the problem that the precision of a spring on the inner side of an existing device is difficult to adjust in real time according to requirements, and adopts the following scheme that the safety valve comprises a low-temperature pump body and a safety valve body assembled on the low-temperature pump body, a pressure measuring mechanism communicated with the low-temperature pump body and the safety valve body is arranged between the low-temperature pump body and the safety valve body; the pressure measuring mechanism comprises a pressure monitoring meter, and the pressure monitoring meter comprises a pressure sensor in contact with airflow and a pressure counter arranged on the outer side; according to the cryopump safety valve, through the arrangement of the pressure measuring mechanism structure, redundant gas on the inner side of a cryopump body can be conveyed to the inner side of the cryopump body and the safety valve body, the pressure of fluid on the inner side of the cryopump body can be monitored in real time through a pressure monitoring meter according to the pressure relief progress, and meanwhile the real-time pressure value of a spring on the inner side of the cryopump body can be synchronously adjusted by adjusting a threaded rod on the safety valve body; the pressure relief precision of the device is guaranteed, and the precision of the spring can be accurately adjusted without disassembly.

Description

A cryogenic pump safety valve Technical Field

[0001] This utility model relates to the field of cryogenic pump technology, specifically to a cryogenic pump safety valve. Background Technology

[0002] Regeneration of a cryogenic pump is the process of desorbing and releasing the adsorbed and condensed gas stored inside the pump. There are various regeneration methods, each with different time requirements and regeneration effects. In principle, the gas captured by a cryogenic pump can be removed in solid, gaseous, or liquid states. However, due to the technical difficulties of removing condensate in solid states, most cryogenic pumps currently employ the latter two methods. Based on the heating method, regeneration methods are generally classified into three types: natural heating regeneration, gas flushing regeneration, and electric heating regeneration. When using gas flushing regeneration, a large amount of gas (N2 or Ar) needs to be introduced into the pump, causing a rapid increase in pump pressure. To ensure normal operation of the equipment, reduce pump pressure, and prevent damage to the pump body from high pressure, timely pressure relief is necessary, and a safety valve is one method of pressure relief.

[0003] A search revealed that patent application number 202321541886.1 discloses a cryogenic pump safety valve, belonging to the technical field of cryogenic pump safety valves. The valve includes a valve body and an inlet pipe disposed on the lower side wall of the valve body. The inlet pipe is connected to the cryogenic pump via a pipeline. An mounting sleeve is disposed on the left side wall of the valve body, and a cover is threaded onto the upper end face of the valve body. A pressure accumulator is disposed on the upper part of the valve body, and a plunger is slidably mounted on the side wall of the pressure accumulator. A spring seat is fixedly mounted on the upper end face of the plunger. An adjustment mechanism is disposed within the inner cavity of the cover, and an installation mechanism is disposed on the right side wall of the valve body. This utility model, through the cooperation of the plunger and spring seat, achieves automatic pressure relief when the pressure in the cryogenic pump pipeline is too high. Simultaneously, with the cooperation of the adjustment mechanism, the pressure threshold for pressure relief can be controlled to improve the practicality of the entire device. The installation mechanism further enhances the safety performance of the entire safety valve after installation.

[0004] The aforementioned application documents, through innovative designs of each component, have initially achieved effective assurance of system safety performance. However, in the crucial aspect of pressure control, it still employs the traditional spring-based pressure-limiting technology. As a pressure-limiting element, the spring continuously endures cyclical compression and extension stresses during equipment operation. With increasing usage time, fatigue damage inevitably occurs, leading to changes in the elastic coefficient and loosening. This alteration in physical properties directly causes inaccurate pressure control within the pump, resulting in a deviation between the actual and preset pressures. Furthermore, the valve body, as a critical pressure-bearing component of the system, highly depends on precise pressure control for its safety performance. Once pressure is out of control, it could potentially lead to serious consequences such as valve body leakage and rupture, posing a significant threat to the safe and stable operation of the entire system.

[0005] Therefore, we propose a cryogenic pump safety valve. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this utility model provides a cryogenic pump safety valve, which solves the problem that existing devices are difficult to adjust the precision of their inner springs in real time according to requirements.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a cryogenic pump safety valve, comprising a cryogenic pump body and a safety valve body assembled on its output end, wherein a pressure measuring mechanism is provided between the cryogenic pump body and the safety valve body and communicates with it;

[0008] The pressure measuring mechanism includes a pressure monitoring meter, which includes a pressure sensor disposed in contact with the airflow and a pressure counter disposed on the outside.

[0009] As a preferred embodiment of this utility model, the output end of the cryogenic pump body is configured as a pump hole, and the output end of the cryogenic pump body is provided with an inner thread sleeve located outside the pump hole, and the pressure measuring mechanism includes an outer thread sleeve threaded onto the outside of the inner thread sleeve.

[0010] The pump orifice is designed to facilitate the output of excess airflow from the cryogenic pump body to the outer safety valve body, thereby assisting in subsequent stable pressure relief.

[0011] As a preferred embodiment of this utility model, the input end of the safety valve body is provided with an inner screw cylinder, the pressure measuring mechanism includes an outer screw cylinder threaded onto the outside of the inner screw cylinder, and the bottom end of the safety valve body is also provided with an outer pressure cylinder located outside the outer screw cylinder.

[0012] The inner screw cylinder is positioned inside the outer screw cylinder during installation to ensure assembly effectiveness, while the outer pressure cylinder provides secondary protection at the connection point from the outside, ensuring assembly stability.

[0013] As a preferred embodiment of the present invention, the bottom end of the safety valve body is provided with a press-fit groove located between the outer pressure cylinder and the inner screw cylinder, and a sealing ring located between the inner side of the press-fit groove and the end of the outer screw cylinder is press-fitted.

[0014] The sealing ring inside the press-fit groove enables efficient press-fitting of the sealing port, ensuring a tight seal.

[0015] As a preferred embodiment of this utility model, a pressure monitoring gauge and a battery module adapted thereto are fixedly installed on the outer wall of the outer screw cylinder, and a filter screen is also installed on the inner side of the outer screw cylinder by fastening screws.

[0016] The pressure measuring mechanism is positioned to accurately monitor the real-time pressure of the fluid inside the valve, while the filter screen filters the fluid, preventing impurities from entering the safety valve body and causing damage.

[0017] This invention provides a safety valve for a cryogenic pump. It has the following beneficial effects:

[0018] This cryogenic pump safety valve, through its pressure-measuring mechanism, can transport excess gas from the inside of the cryogenic pump body to the inside of the safety valve body. It can also monitor the fluid pressure inside the valve body in real time using a pressure gauge based on the depressurization progress. Simultaneously, the threaded rod on the safety valve body can be adjusted to synchronously regulate the real-time pressure value of the inner spring, ensuring the device's depressurization accuracy. Precise adjustment of the spring's precision can be achieved without disassembly, guaranteeing the safety valve's operational accuracy and solving the problem of existing devices being unable to adjust the inner spring's precision in real time according to requirements. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the structure of this utility model;

[0020] Figure 2 is a structural schematic diagram of the cryogenic pump body of this utility model;

[0021] Figure 3 is a structural schematic diagram of the safety valve body of this utility model;

[0022] Figure 4 is a structural schematic diagram of the pressure measuring mechanism of this utility model.

[0023] In the diagram: 1. Cryogenic pump body; 11. Pump hole; 12. Inner threaded sleeve; 2. Safety valve body; 21. Inner threaded barrel; 22. Outer pressure cylinder; 3. Pressure measuring mechanism; 31. Outer threaded barrel; 32. Outer threaded sleeve; 33. Pressure monitoring gauge. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please refer to Figures 1-4. This utility model embodiment provides a technical solution: a cryogenic pump safety valve, including a cryogenic pump body 1 and a safety valve body 2 assembled on its output end. A pressure measuring mechanism 3 is provided between the cryogenic pump body 1 and the safety valve body 2 and communicates with it. The pressure measuring mechanism 3 includes a pressure monitoring meter 33, which includes a pressure sensor disposed in contact with the airflow and a pressure counter disposed on the outside.

[0026] The cryogenic pump safety valve, through the design of the pressure measuring mechanism 3, can transport excess gas from the inside of the cryogenic pump body 1 to the inside of the safety valve body 2. The pressure gauge 33 can monitor the fluid pressure inside the valve body 2 in real time according to the depressurization progress. Simultaneously, the threaded rod on the safety valve body 2 can be adjusted to synchronously adjust the real-time pressure value of the inner spring, ensuring the depressurization accuracy of the device. Precise adjustment of the spring's accuracy can be achieved without disassembly, ensuring the accuracy of the safety valve's operation and solving the problem of existing devices being unable to adjust the inner spring's accuracy in real time according to requirements. Example 1

[0027] The output end of the cryogenic pump body 1 is configured as a pump hole 11. The output end of the cryogenic pump body 1 is provided with an inner threaded sleeve 12 located outside the pump hole 11, and the pressure measuring mechanism 3 includes an outer threaded sleeve 32 threadedly fitted outside the inner threaded sleeve 12. The configuration of the pump hole 11 facilitates the output of excess airflow in the cryogenic pump body 1 to the outer safety valve body 2 to assist in subsequent stable pressure relief.

[0028] The safety valve body 2 has an inner screw cylinder 21 at its input end. The pressure measuring mechanism 3 includes an outer screw cylinder 31 threaded around the inner screw cylinder 21. The bottom end of the safety valve body 2 also has an outer pressure cylinder 22 located outside the outer screw cylinder 31. The inner screw cylinder 21 is positioned inside the outer screw cylinder 31 during installation to ensure assembly. The outer pressure cylinder 22 provides secondary protection at the connection point from the outside, ensuring assembly stability.

[0029] The bottom end of the safety valve body 2 is provided with a press-fit groove between the outer pressure cylinder 22 and the inner screw cylinder 21, and a sealing ring is press-fitted on the inner side of the press-fit groove between it and the end of the outer screw cylinder 31; wherein, the sealing ring on the inner side of the press-fit groove can efficiently press-fit its sealing port to ensure sealing performance.

[0030] A pressure monitoring gauge 33 and a matching battery module are fixedly installed on the outer wall of the outer screw barrel 31, and a filter screen is installed on the inner side of the outer screw barrel 31 by fastening screws. The setting of the pressure measuring mechanism 3 can accurately monitor the real-time pressure of the fluid inside, while the setting of the filter screen can filter the fluid to prevent impurities from entering the inner side of the safety valve body 2 and causing damage.

[0031] The working principle and usage process of this utility model are as follows: When the device needs to work, the pressure measuring mechanism 3 is threaded onto the bottom end of the safety valve body 2, and the bottom end of the pressure measuring mechanism 3 is threaded onto the inner thread sleeve 12 at the output end of the cryogenic pump body 1. Before operation, the gas inside the cryogenic pump body 1 is discharged outward, and the pressure monitoring gauge 33 in the pressure measuring mechanism 3 accurately measures the real-time gas pressure inside the pressure measuring mechanism 3. The threaded rod on the safety valve body 2 is adjusted according to the requirements, and the compression state of the inner spring is adjusted synchronously, thereby accurately adjusting the pressure relief threshold of the safety valve body 2 to ensure the accuracy of subsequent pressure relief of the cryogenic pump body 1.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cryogenic pump safety valve, characterized in that: It includes a cryogenic pump body (1) and a safety valve body (2) assembled on its output end. A pressure measuring mechanism (3) is provided between the cryogenic pump body (1) and the safety valve body (2) and communicates with it. The pressure measuring mechanism (3) includes a pressure monitoring meter (33), which includes a pressure sensor that is in contact with the airflow and a pressure counter that is located on the outside.

2. The cryogenic pump safety valve according to claim 1, characterized in that: The output end of the cryogenic pump body (1) is configured as a pump hole (11), and the output end of the cryogenic pump body (1) is provided with an inner thread sleeve (12) located outside the pump hole (11), and the pressure measuring mechanism (3) includes an outer thread sleeve (32) threaded on the outside of the inner thread sleeve (12).

3. A cryogenic pump safety valve according to claim 1, characterized in that: The safety valve body (2) has an inner screw cylinder (21) at its input end. The pressure measuring mechanism (3) includes an outer screw cylinder (31) threaded around the inner screw cylinder (21). The bottom end of the safety valve body (2) also has an outer pressure cylinder (22) located outside the outer screw cylinder (31).

4. A cryogenic pump safety valve according to claim 3, characterized in that: The bottom end of the safety valve body (2) is provided with a press-fit groove between the outer pressure cylinder (22) and the inner screw cylinder (21), and a sealing ring is press-fitted on the inner side of the press-fit groove between it and the end of the outer screw cylinder (31).

5. A cryogenic pump safety valve according to claim 3, characterized in that: A pressure monitoring gauge (33) and a battery module adapted thereto are fixedly installed on the outer wall of the outer screw (31), and a filter screen is also installed on the inner side of the outer screw (31) by fastening screws.

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