Automatic protection device for steel cylinder

Abstract

The utility model relates to an automatic protection device for a steel cylinder, which comprises a connector, a first fitting piece, a second fitting piece and a blocking ball, a pressure relief cavity and a pressure relief hole are arranged in the connector, the first fitting piece is arranged in the pressure relief cavity and is provided with a pressure relief channel communicated with the pressure relief cavity, the second fitting piece comprises a main loop bar and a loop bar, and a spring is arranged between the main loop bar and the loop bar. The blocking ball seals the pressure relief channel through the spring, flexible adjustment and quick response of the pressure relief range are achieved through the taper hole and the horn mouth structure, the taper hole accelerates airflow, concentrates pressure and improves sensitivity, the horn mouth enlarges the sealing area and enhances reliability, the overall structure is matched with various steel cylinders, and the problem that an existing pressure relief valve is inconvenient to match is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas pressure relief protection technical field, especially a steel bottle automatic protection device. BACKGROUND

[0002] In the field of gas cylinder safety technology, the pressure relief device is crucial to the safety of the cylinder. When the cylinder is inflated, transported or affected by temperature changes, the internal gas pressure is easy to exceed the rated pressure range, and the pressure needs to be released through the pressure relief valve. In the prior art, the pressure relief valve is usually directly installed on the cylinder, but due to the difference in pressure-bearing capacity of different cylinders (such as industrial, medical and special gas cylinders) and the different safety pressure standards corresponding to the types of stored gas (such as inert gas and flammable gas), the pressure relief valve must be matched with a specific cylinder for use, which makes the existing pressure relief valve inconvenient to use. SUMMARY

[0003] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] To solve the above-mentioned problems, the utility model provides the following technical scheme:

[0005] A steel cylinder automatic protection device comprises a connecting head, an internal pressure relief cavity is provided in the connecting head, and a pressure relief hole is provided on the connecting head and communicates with the pressure relief cavity;

[0006] A first matching part is movably sleeved in the pressure relief cavity and placed in a first interface of the connecting head, the first matching part is provided with a pressure relief channel, the pressure relief channel communicates with the first interface and the pressure relief cavity, a second matching part is movably sleeved in the pressure relief cavity and placed in a second interface of the connecting head, the second matching part comprises a main sleeve rod and a sleeve rod sleeved on the main sleeve rod, a spring is arranged between the main sleeve rod and the sleeve rod, a plug ball is rotatably arranged on the sleeve rod and sealed in the pressure relief channel of the first matching part by the spring.

[0007] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0008] As a preferred scheme of the steel cylinder automatic protection device of the utility model, the surface of the plug ball or the pressure relief channel of the first matching part is provided with a sealing member.

[0009] As a preferred scheme of the steel cylinder automatic protection device of the utility model, the connecting head is provided with a gas inlet hole communicating with the first interface and the second interface, and a valve is arranged in the inner cavity of the second interface.

[0010] In a preferred embodiment of the automatic cylinder protection device of this utility model, both the first mating component and the second mating component are threadedly connected to the inner wall of the pressure relief chamber.

[0011] In a preferred embodiment of the automatic cylinder protection device of this utility model, the tail of the first mating component is provided with a first mounting groove, and the tail of the second mating component is provided with a second mounting groove.

[0012] As a preferred embodiment of the automatic cylinder protection device of this utility model, the second mating component has a conical hole at one end of the pressure relief channel of the first interface and a flared mouth at the other end.

[0013] In a preferred embodiment of the automatic cylinder protection device of this utility model, the inner walls of both the first interface and the second interface are provided with threads.

[0014] The beneficial effects of this utility model are as follows: through the cooperative design of the connector, the first mating part, the second mating part and the plug ball, combined with the conical holes and flared mouth structure at both ends of the pressure relief channel, the pressure relief range can be flexibly adjusted and quickly responded to. The conical holes accelerate gas flow and concentrate pressure, improving the pressure relief sensitivity and the ability to predict high pressure. The flared mouth expands the sealing contact area, enhancing the sealing reliability and durability. The overall structure solves the problem of inconvenience in matching existing pressure relief valves with specific steel cylinders, and is suitable for a variety of steel cylinders. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0016] Figure 1 This is a perspective view of the entire embodiment.

[0017] Figure 2 This is a perspective view of the entire embodiment.

[0018] Figure 3 This is an example. Figure 1 Partial 3D view.

[0019] Figure 4 This is an example. Figure 3 Floor plan.

[0020] In the figure; connector 100, first interface 101, second interface 102, air supply port 103, pressure relief chamber 104, pressure relief hole 105;

[0021] The first fitting member 200, the first mounting groove 201, the pressure relief channel 202, the tapered hole 202a, and the trumpet mouth 202b;

[0022] The second fitting member 300, the main sleeve rod 301, the sleeve rod 302, the plug ball 303, the spring 304, and the second mounting groove 305.

[0023] The valve 400. DETAILED DESCRIPTION

[0024] To make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0025] In the following description, a lot of specific details are set forth in order to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0027] EMBODIMENT

[0028] REFERENCE Figures 1 to 4 For the embodiment of the present application, the embodiment provides a steel cylinder automatic protection device, the connector 100 is a cylindrical shell structure, the inside of which is provided with a pressure relief cavity 104, the two ends of the pressure relief cavity 104 are respectively provided with a first interface 101 and a second interface 102, which are used to connect the steel cylinder and the external pipeline, the side wall of the connector 100 is provided with a pressure relief hole 105, which is in communication with the pressure relief cavity 104, and is used to release gas under overpressure, the first fitting member 200 is movably sleeved in the pressure relief cavity 104 and is fixed at the first interface 101, the first fitting member 200 is provided with a pressure relief channel 202, one end of the pressure relief channel 202 is in communication with the first interface 101, the other end is in communication with the pressure relief cavity 104,

[0029] The outlet end of the pressure relief channel 202 is provided with a tapered sealing surface for forming a sealing contact with the blocking ball 303. The second fitting member 300 is movably sleeved in the pressure relief cavity 104 and is fixed at the second interface 102. The second fitting member 300 comprises a main sleeve rod 301 and a sleeve rod 302 sleeved on the main sleeve rod 301. A spring 304 is arranged between the main sleeve rod 301 and the sleeve rod 302, and the two ends of the spring 304 are fixed on the main sleeve rod 301 and the sleeve rod 302 respectively, for providing a pre-tightening force;

[0030] The blocking ball 303 is rotatably arranged on the sleeve rod 302, and the surface thereof is a spherical surface structure, forming a line contact sealing with the tapered sealing surface of the pressure relief channel 202. The blocking ball 303 is tightly sealed to the pressure relief channel 202 by the pre-tightening force of the spring 304, and remains in a sealed state under normal pressure.

[0031] When the pressure of the gas in the cylinder is normal, the blocking ball 303 tightly contacts the tapered sealing surface of the pressure relief channel 202 under the action of the spring 304, preventing the gas from leaking. When the pressure of the gas in the cylinder exceeds a set value, the gas pressure pushes the blocking ball 303 to overcome the pre-tightening force of the spring 304, so that the blocking ball 303 is separated from the pressure relief channel 202. The gas enters the pressure relief cavity 104 through the pressure relief channel 202 and is discharged from the pressure relief hole 105, realizing pressure relief protection. When the pressure returns to normal, the spring 304 pushes the blocking ball 303 to reseal the pressure relief channel 202, and the device returns to the initial state.

[0032] In the embodiment, the first fitting member 200 and the second fitting member 300 are connected by threads to adjust the relative distance, so as to change the pre-tightening force of the spring 304, to adapt to the pressure relief pressure requirements of different cylinders.

[0033] The outer wall of the first fitting member 200 is provided with external threads, and the inner wall of the pressure relief cavity 104 is provided with matching internal threads. By rotating the first fitting member 200, the relative distance between the first fitting member 200 and the second fitting member 300 can be changed, so as to adjust the compression amount of the spring 304. When the first fitting member 200 is rotated clockwise, it moves towards the second fitting member 300, the spring 304 is compressed, the pre-tightening force is increased, and the pressure relief pressure is increased. When the first fitting member 200 is rotated counterclockwise, it moves away from the second fitting member 300, the spring 304 is elongated, the pre-tightening force is decreased, and the pressure relief pressure is decreased. This adjustment method is suitable for cylinders with different pressure-bearing capacities, such as industrial cylinders and medical cylinders. The pressure relief pressure can be flexibly adjusted according to actual needs.

[0034] It is worth mentioning that the second fitting member 300 is provided with a tapered hole 202a at one end of the pressure relief channel 202 of the first interface 101 and a flared opening 202b at the other end. The flared opening 202b is more conducive to the sealing of the pressure relief channel 202 of the first fitting member 200 by the blocking ball 303, and the tapered hole 202a is conducive to increasing the gas pressure discharged from the steel cylinder, thereby having the ability to predict high pressure in advance. It is also conducive to pushing out the blocking ball 303 to release the gas pressure earlier and faster. In this embodiment, the tapered hole 202a is provided at one end of the pressure relief channel 202 close to the steel cylinder, and the hole diameter gradually decreases from the side of the steel cylinder to the pressure relief cavity 104. The taper angle is 30° to 45°, which can accelerate the flow of gas and concentrate the pressure, thereby improving the sensitivity of the pressure relief response. The flared opening 202b is provided at one end close to the blocking ball 303, and the hole diameter gradually expands from the side of the pressure relief cavity 104 to the blocking ball 303. The flared opening angle is 60° to 90°, which expands the contact area between the blocking ball 303 and the pressure relief channel 202, making the sealing more uniform and reliable. The tapered hole 202a helps to predict high pressure in advance and quickly release pressure, while the flared opening 202b reduces gas leakage and component wear, significantly improving the safety and service life of the device.

[0035] Importantly, it should be noted that the constructions and arrangements of the present application shown in the various example embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be modified or changed. Accordingly, all such modifications are intended to be included within the scope of the present inventive subject matter. The order or sequence of any process or method steps can be changed or re-sequenced without departing from the generality of the application. In the claims, any "means plus function" clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the example embodiments without departing from the scope of the present inventive subject matter. Accordingly, the present inventive subject matter is not limited to particular embodiments described, but extends to any inventive subject matter that would still fall within the scope of the appended claims.

[0036] Furthermore, in order to provide a concise description of illustrative embodiments, not all features of an actual implementation can be described (i.e., those not relevant to the presently considered best mode of carrying out the present application, or those not necessary for enabling the present application).

[0037] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application, and all modifications and equivalent replacements should be covered in the scope of the claims of the present application.

Claims

1. An automatic protection device for a steel bottle, characterized by: The connecting head (100) is internally provided with a pressure relief cavity (104), and the connecting head (100) is provided with a pressure relief hole (105) in communication with the pressure relief cavity (104); The first fitting part (200) is movably sleeved in the pressure relief cavity (104) and is arranged at the first interface (101) of the connecting head (100), the first fitting part (200) is provided with a pressure relief channel (202), the pressure relief channel (202) is in communication with the first interface (101) and the pressure relief cavity (104), the second fitting part (300) is movably sleeved in the pressure relief cavity (104) and is arranged at the second interface (102) of the connecting head (100), the second fitting part (300) comprises a main sleeve rod (301) and a sleeve rod (302) sleeved on the main sleeve rod (301), a spring (304) is arranged between the main sleeve rod (301) and the sleeve rod (302), a blocking ball (303) is rotatably arranged on the sleeve rod (302) and is sealed to the pressure relief channel (202) of the first fitting part (200) by the spring (304).

2. The automatic protection device for a steel bottle according to claim 1, wherein The surface of the blocking ball (303) or the pressure relief channel (202) of the first fitting part (200) is provided with a sealing element.

3. The automatic protection device for a steel cylinder according to claim 1, wherein: The connecting head (100) is provided with a gas inlet hole (103) in communication with the first interface (101) and the second interface (102), and the inner cavity of the second interface (102) is provided with a valve (400).

4. The automatic protection device for a steel cylinder according to claim 1, wherein The first fitting part (200) and the second fitting part (300) are both threadedly connected with the inner wall of the pressure relief cavity (104).

5. The automatic protection device for steel cylinders according to claim 4, characterized in that: The tail of the first fitting part (200) is provided with a first mounting groove (201), and the tail of the second fitting part (300) is provided with a second mounting groove (305).

6. The automatic protection device for a steel bottle according to claim 1 or 4, characterized in that: The pressure relief channel (202) at one end of the first interface (101) of the second fitting part (300) is provided with a conical hole (202a), and the other end is provided with a trumpet mouth (202b).

7. The automatic protection device for a steel cylinder according to claim 1, wherein: The inner walls of the first interface (101) and the second interface (102) are both provided with threads.

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