Maintenance valve structure and medical gas terminal

Abstract

The utility model relates to the technical field of gas supply terminals, and provides a maintenance valve structure and a medical gas terminal.The maintenance valve structure comprises a base with a gas inlet, a maintenance valve seat is arranged in the base, a gas outlet is formed in the maintenance valve seat, the gas outlet is communicated with the gas inlet to form a gas supply channel, and a first sealing ring is installed on the inner wall of the gas outlet; a spring and a steel ball are arranged in the air supply channel, the steel ball can abut against the first sealing ring under the action of the spring to form a sealing pair, positioning supports used for limiting radial displacement of the steel ball are arranged in the air outlet hole, and a plurality of ventilation gaps are reserved between the positioning supports and the steel ball. According to the maintenance valve structure, the radial displacement of the steel ball along the air outlet hole can be limited, the situation that the steel ball cannot recover to the original working state due to overlarge radial deviation when the maintenance valve is recovered after parts in the maintenance valve are disassembled for maintenance is avoided, and the maintenance of the terminal main body of the medical gas terminal and the maintenance valve structure is more convenient; and meanwhile, enough ventilation space between the steel ball and the air outlet hole is ensured by the ventilation gap.

Description

Technical Field

[0001] The utility model relates to the technical field of gas supply terminals, in particular to a maintenance valve structure and a medical gas terminal. Background Art

[0002] Medical gas terminals are devices used in hospital operating rooms, emergency rooms, resuscitation rooms, wards and other places to provide medical oxygen, medical air, medical vacuum and other medical gases to medical staff and patients.

[0003] In the existing medical gas terminals, almost all of them have a maintenance valve structure, for example, a medical gas terminal with a publication number of "CN213077021U", reference Figure 1 , including the terminal body (i.e., the gland assembly, the valve seat assembly, and the valve core assembly) and the maintenance valve structure (i.e., the structure composed of the base 1, the maintenance valve seat 2, the steel ball 3, and the spring 4). The maintenance valve structure is used to facilitate the medical gas terminal to repair the parts in the terminal body without shutting off the gas source (i.e., after removing the terminal body, the steel ball automatically returns to its position under the action of the spring and contacts the sealing ring to achieve sealing). In addition, if the parts in the maintenance valve structure are damaged or fail, they also need to be repaired quickly.

[0004] However, in actual applications, when the medical gas terminal is working, the axis of the plug interface of the terminal body is not in the vertical direction (i.e. Figure 1 shown), but towards the horizontal direction (i.e. Figure 1 There is a large gap between the steel ball and the outlet hole as ventilation space. If the parts in the repair valve structure are damaged or fail, the steel ball will fall under the action of gravity. After the parts in the repair valve are removed for repair, it is difficult for the steel ball to return to the working state of contact with the sealing ring when the repair valve is restored. This brings great difficulties to the maintenance of the medical gas terminal. Utility Model Content

[0005] The purpose of the utility model is to provide a maintenance valve structure and a medical gas terminal to solve the above-mentioned defects of the prior art.

[0006] The embodiments of the present invention are implemented by the following technical solutions:

[0007] A maintenance valve structure comprises a base with an air inlet, a maintenance valve seat is arranged in the base, the maintenance valve seat is provided with an air outlet, the air outlet is connected to the air inlet to form an air supply channel, a first sealing ring is installed on the inner wall of the air outlet, a spring and a steel ball are arranged in the air supply channel, the steel ball can be abutted against the first sealing ring to form a sealing pair under the action of the spring, a positioning bracket for limiting the radial displacement of the steel ball is arranged in the air outlet, and a plurality of ventilation gaps are left between the positioning brackets and the steel balls.

[0008] Optionally, the positioning bracket includes a plurality of positioning bars arranged at intervals along the circumferential direction, and the positioning bars are fixedly connected to the inner wall of the air outlet.

[0009] Optionally, the inner wall of the air outlet is provided with a plurality of positioning slots, and the positioning strips are arranged in the positioning slots in a one-to-one correspondence.

[0010] Optionally, the positioning bracket includes a connecting sleeve, which is fixedly connected to the inner wall of the air outlet hole, and the inner wall of the connecting sleeve is provided with a plurality of positioning parts at intervals along the circumferential direction.

[0011] Optionally, the connecting sleeve is connected to the air outlet through threads.

[0012] Optionally, a plurality of ventilation grooves are provided at intervals along the circumferential direction on the inner wall of the air outlet, positioning bosses are formed between adjacent ventilation grooves, and the positioning bosses together constitute the positioning bracket.

[0013] Optionally, the spring is a conical spring.

[0014] Optionally, the base is provided with a connecting portion at the air inlet end of the air inlet hole, and the connecting portion is provided with an external thread.

[0015] Optionally, a second sealing ring is installed on the end surface of the connecting portion.

[0016] The utility model also provides a medical gas terminal, comprising any one of the maintenance valve structures described above.

[0017] The technical solution of the present utility model has at least the following advantages and beneficial effects: in the present utility model, the radial displacement of the steel ball along the air outlet is limited by the provided positioning bracket, so as to avoid excessive radial displacement of the steel ball and inability to restore to the original working state when the repair valve is restored after the parts in the repair valve are removed for repair, thereby making the maintenance of the terminal body of the medical gas terminal and the repair valve structure itself more convenient; at the same time, the ventilation gap ensures that there is sufficient ventilation space between the steel ball and the air outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a medical gas terminal provided by the prior art;

[0020] Figure 2A structural schematic diagram of a maintenance valve structure is provided for embodiment 1;

[0021] Figure 3 It is a structural schematic diagram of the maintenance valve seat in the first embodiment;

[0022] Figure 4 for Figure 3 AA section view;

[0023] Figure 5 It is a structural schematic diagram of the positioning bracket in the second embodiment;

[0024] Icon: 10-maintenance valve structure, 1-base, 101-air inlet, 2-maintenance valve seat, 3-steel ball, 4-spring, 5-first sealing ring, 6-positioning bracket, 601-connecting sleeve, 602-positioning part, 7-connecting part, 8-second sealing ring, 9-third sealing ring. DETAILED DESCRIPTION

[0025] Embodiment 1

[0026] refer to Figure 2-4 The present embodiment provides a maintenance valve structure, including a base 1 with an air inlet 101, a maintenance valve seat 2 is provided in the base 1, specifically, the maintenance valve seat 2 and the base 1 are screwed together by threads, and in order to ensure the sealing, a third sealing ring 9 is provided between the maintenance valve seat 2 and the base 1.

[0027] The base 1 is provided with a connecting portion 7 at the air inlet end of the air inlet hole 101. The connecting portion 7 is provided with an external thread, that is, it is convenient to connect with the air inlet pipe through a thread when in use, and it is convenient to repair or replace the entire medical gas terminal. Further, a second sealing ring 8 is installed on the end surface of the connecting portion 7. It is easy to understand that the second sealing ring 8 plays a sealing role.

[0028] The maintenance valve seat 2 is provided with an air outlet, which is connected to the air inlet 101 to form an air supply channel. A first sealing ring 5 is installed on the inner wall of the air outlet, and a spring 4 and a steel ball 3 are provided in the air supply channel. In actual application, when the terminal is in working state, the parts in the terminal body push the steel ball 3 to move downward and form a sufficient air supply channel. After the terminal body is removed, the steel ball 3 can be against the first sealing ring 5 under the action of the spring 4 to form a sealing pair, thereby realizing leakage-free maintenance of the parts in the terminal body.

[0029] In the present embodiment, the spring 4 is a conical spring, which has better stability and less bending tendency, and is compact and highly small, saving space. Of course, a cylindrical spring can also be selected in other embodiments.

[0030] On the basis of the above, a positioning bracket 6 is provided in the air outlet to limit the radial displacement of the steel ball 3, and a number of ventilation gaps are left between the positioning brackets 6 and the steel ball 3. In this way, after the parts in the maintenance valve are removed for maintenance, when the maintenance valve is restored again, it can avoid that the radial displacement of the steel ball 3 is too large and cannot be restored to the original working state, making the maintenance of the terminal body of the medical gas terminal and the maintenance valve structure 10 itself more convenient; at the same time, the ventilation gap ensures that there is sufficient ventilation space between the steel ball 3 and the air outlet.

[0031] In this embodiment, the positioning bracket 6 includes a plurality of positioning strips arranged at intervals along the circumferential direction. It should be understood that the gap between adjacent positioning strips is the ventilation gap. In this embodiment, there are four positioning strips. Of course, other embodiments may have other numbers of positioning strips. The positioning strips are fixedly connected to the inner wall of the air outlet (for example, bonding or welding). In some embodiments, the positioning strips may be directly connected to the inner wall of the air outlet. In this embodiment, the inner wall of the air outlet is provided with a plurality of positioning slots, and the positioning strips are arranged in the positioning slots one by one. It is worth noting that the positioning slots can limit the position of each positioning strip for easy installation.

[0032] Embodiment 2

[0033] The difference between this embodiment and the first embodiment is that the structure of the positioning bracket 6 is different. Figure 5 In this embodiment, the positioning bracket 6 includes a connecting sleeve 601, and the inner wall of the connecting sleeve 601 is provided with a plurality of positioning portions 602 at intervals along the circumferential direction. In this embodiment, four positioning portions 602 are provided, and the four positioning portions 602 jointly limit the radial displacement of the steel ball 3 along the air outlet, and the gap between adjacent positioning portions 602 is the ventilation gap.

[0034] The connecting sleeve 601 is fixedly connected to the inner wall of the air outlet. Specifically, in this embodiment, the connecting sleeve 601 is connected to the air outlet by threads. It is worth noting that, in this way, the positioning bracket 6 is a whole that is easy to disassemble and assemble, and is more convenient to use. In addition, it should be understood that in other embodiments, the connecting sleeve 601 and the air outlet can of course also be welded or bonded.

[0035] Embodiment 3

[0036] The difference between this embodiment and the first and second embodiments is that a positioning bracket 6 different from the above structure is provided. Specifically, the inner wall of the air outlet of this embodiment is provided with a plurality of ventilation grooves at intervals along the circumferential direction. The ventilation grooves are equivalent to ventilation gaps. Positioning bosses are formed between adjacent ventilation grooves. Each positioning boss together constitutes the positioning bracket 6. On this basis, it is easy to understand that the positioning bracket 6 can be formed by processing the inner wall of the air outlet in this embodiment without adding any additional parts.

[0037] Embodiment 4

[0038] This embodiment provides a medical gas terminal, including the maintenance valve structure 10 provided in any of the above embodiments.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A maintenance valve structure, comprising a base (1) with an air inlet (101), a maintenance valve seat (2) arranged in the base (1), an air outlet arranged in the maintenance valve seat (2), the air outlet connected to the air inlet (101) forming an air supply channel, a first sealing ring (5) installed on the inner wall of the air outlet, a spring (4) and a steel ball (3) arranged in the air supply channel, the steel ball (3) can abut against the first sealing ring (5) under the action of the spring (4) to form a sealing pair, characterized in that: A positioning bracket (6) for limiting the radial displacement of the steel ball (3) is arranged in the air outlet hole, and a plurality of ventilation gaps are left between the positioning bracket (6) and the steel ball (3).

2. The maintenance valve structure according to claim 1, characterized in that: The positioning bracket (6) comprises a plurality of positioning strips arranged at intervals along the circumferential direction, and the positioning strips are fixedly connected to the inner wall of the air outlet.

3. The maintenance valve structure according to claim 2, characterized in that: The inner wall of the air outlet is provided with a plurality of positioning slots, and the positioning strips are arranged in the positioning slots in a one-to-one correspondence.

4. The maintenance valve structure according to claim 1, characterized in that: The positioning bracket (6) comprises a connecting sleeve (601), the connecting sleeve (601) is fixedly connected to the inner wall of the air outlet, and the inner wall of the connecting sleeve (601) is provided with a plurality of positioning portions (602) at intervals along the circumferential direction.

5. The maintenance valve structure according to claim 4, characterized in that: The connecting sleeve (601) is connected to the air outlet hole via threads.

6. The maintenance valve structure according to claim 1, characterized in that: The inner wall of the air outlet hole is provided with a plurality of ventilation grooves at intervals along the circumferential direction, and positioning bosses are formed between adjacent ventilation grooves, and the positioning bosses together constitute the positioning bracket (6).

7. The maintenance valve structure according to any one of claims 1 to 6, characterized in that: The spring (4) is a conical spring.

8. The maintenance valve structure according to any one of claims 1 to 6, characterized in that: The base (1) is provided with a connecting portion (7) at the air inlet end of the air inlet hole (101), and the connecting portion (7) is provided with an external thread.

9. The maintenance valve structure according to claim 8, characterized in that: A second sealing ring (8) is installed on the end surface of the connecting portion (7).

10. A medical gas terminal, characterized in that: It comprises the maintenance valve structure (10) as claimed in any one of claims 1 to 8.

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