Cylinder valve for air respirator with meter

Abstract

The utility model provides a gas cylinder valve for an air respirator with a meter, which comprises a valve body, a valve cavity arranged on the valve body, an air inlet hole and an air outlet hole respectively communicated with the valve cavity, a valve seat communicated with the air inlet hole arranged at the bottom of the valve cavity, a valve core capable of abutting against the valve seat arranged in the valve cavity, and a through hole communicated with the air inlet hole arranged on the valve core. The lower end of the pressure gauge connector is fixedly connected with the valve element, the upper end of the pressure gauge connector is connected with a pressure gauge, the pressure gauge connector is provided with an air guide hole communicated with the center penetrating hole, the outer side of the upper end of the pressure gauge connector is fixedly connected with a hand wheel, the top of the hand wheel is provided with a containing groove, and the pressure gauge is arranged in the containing groove. The pressure gauge connector is adopted to replace a valve rod to drive the valve element to move to achieve opening and closing of the valve, the through hole is formed in the valve element to be communicated with the air inlet hole, gas pressure in a bottle can be transmitted to the pressure gauge through the through hole and the air guide hole, the pressure gauge and the pressure gauge connector are both arranged in the hand wheel, the size of the valve body is reduced, and the weight of the whole valve is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas cylinder valves, in particular to a gas cylinder valve for a metered air respirator. Background Art

[0002] Air respirators are widely used in firefighting, chemical industry, shipbuilding, petroleum, smelting, warehouses, laboratories, mines and other departments. They are used by firefighters or emergency rescue personnel to safely and effectively extinguish fires, carry out emergency rescue and rescue work in various environments such as dense smoke, toxic gas, steam or hypoxia. The components of air respirators include cylinder valves, masks, cylinders, shoulder straps, alarm whistles, pressure reducer supply valves, etc. The cylinder valve is equipped with a pressure gauge. The existing cylinder valves with gauges for air respirators have separate ventilation channels and gas channels for the valve body pressure gauge. The pressure gauge directly reflects the pressure in the cylinder. A separate pressure gauge interface needs to be set on the valve body of the cylinder valve. Therefore, the valve body is generally larger in size and heavier in weight. Utility Model Content

[0003] The utility model aims to solve the problems existing in the prior art and provides a gas cylinder valve for a surface air respirator.

[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] A gas cylinder valve for an air breathing apparatus with a meter, comprising a valve body, the valve body being provided with a valve cavity, and an air inlet and an air outlet respectively connected to the valve cavity, a valve seat connected to the air inlet being provided at the bottom of the valve cavity, a valve core capable of abutting against the valve seat being provided in the valve cavity, a through hole connected to the air inlet being provided on the valve core, a pressure gauge joint being threadedly connected to the valve body, the lower end of the pressure gauge joint being fixedly connected to the valve core, and the upper end being connected to a pressure gauge, the pressure gauge joint being provided with an air guide hole connected to the through hole, a hand wheel being fixedly connected to the outer side of the upper end of the pressure gauge joint, a receiving groove being provided on the top of the hand wheel, and the pressure gauge being arranged in the receiving groove.

[0006] Preferably, the pressure gauge connector is threadedly connected to the pressure gauge, and a first sealing ring is provided between the pressure gauge connector and the pressure gauge.

[0007] Preferably, the handwheel is connected to the pressure gauge joint via a connecting screw.

[0008] Preferably, a screw hole matching with the connecting screw is provided on the side wall of the upper end of the pressure gauge joint, and a through hole matching with the connecting screw is provided on the hand wheel.

[0009] Preferably, the valve body comprises a valve body, and a pressure cap connected to the upper end of the valve body, and the pressure gauge connector is threadedly connected to the pressure cap.

[0010] Preferably, the pressure cap is threadedly connected to the valve body, and a second sealing ring is provided between the pressure cap and the valve body.

[0011] Preferably, a third sealing ring is provided between the inner wall of the pressure cap and the outer wall of the pressure gauge joint.

[0012] Preferably, the top end of the pressure cap is threadedly connected to a limit screw, and the pressure gauge joint is provided with a limit boss that matches the limit screw.

[0013] Preferably, the valve body is provided with a safety pressure relief interface communicated with the air inlet hole, and the safety pressure relief interface is connected to a safety pressure relief device.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model adopts a pressure gauge joint to replace the valve stem and the valve body threaded connection, thereby driving the valve core to move up and down to realize the opening and closing of the valve. A through hole is arranged on the valve core to be connected with the air inlet hole. The gas pressure in the bottle can be transmitted to the pressure gauge through the through hole and the air guide hole. The pressure gauge and the pressure gauge joint are both arranged inside the hand wheel, which reduces the volume of the valve body and reduces the weight of the entire valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the internal structure of the utility model when it is closed;

[0017] Figure 2 This is a schematic diagram of the internal structure of the utility model when it is opened

[0018] Description of Reference Numerals

[0019] 1-valve cavity, 2-air inlet, 3-air outlet, 4-valve seat, 5-valve core, 6-through hole, 7-pressure gauge connector, 8-pressure gauge, 9-air guide hole, 10-handwheel, 11-accommodating groove, 12-first sealing ring, 13-connecting screw, 14-valve body, 15-pressure cap, 16-second sealing ring, 17-third sealing ring, 18-limiting screw, 19-limiting boss, 20-safety pressure relief device, 21-screw hole, 22-through hole. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0021] like Figure 1 and Figure 2As shown, a gas cylinder valve for an air breathing apparatus with a meter includes a valve body, a valve cavity 1 is provided on the valve body, and an air inlet 2 and an air outlet 3 respectively connected to the valve cavity 1, a valve seat 4 connected to the air inlet 2 is provided at the bottom of the valve cavity 1, a valve core 5 capable of abutting against the valve seat 4 is provided in the valve cavity 1, a through hole 6 connected to the air inlet 2 is provided on the valve core 5, a pressure gauge joint 7 is threadedly connected to the valve body, the lower end of the pressure gauge joint 7 is fixedly connected to the valve core 5, and the upper end is connected to a pressure gauge 8, the pressure gauge joint 7 is provided with an air guide hole 9 connected to the through hole 6, a hand wheel 10 is fixedly connected to the outer side of the upper end of the pressure gauge joint 7, a receiving groove 11 is provided on the top of the hand wheel 10, and the pressure gauge 8 is arranged in the receiving groove 11.

[0022] Specifically, the gas cylinder valve for the air breathing apparatus with a gauge in this embodiment adopts a pressure gauge connector 7 instead of a valve stem to be threadedly connected to the valve body, thereby driving the valve core 5 to move up and down to realize the opening and closing of the valve. A through hole 6 is provided on the valve core 5 to communicate with the air inlet 2. The gas pressure in the bottle can be transmitted to the pressure gauge 8 through the through hole 6 and the air guide hole 9. The pressure gauge 8 and the pressure gauge connector 7 are both arranged inside the hand wheel 10, which reduces the volume of the valve body and reduces the weight of the entire valve.

[0023] In some embodiments, the pressure gauge connector 7 is threadedly connected to the pressure gauge 8, and a first sealing ring 12 is provided between the pressure gauge connector 7 and the pressure gauge 8. Specifically, a threaded hole is provided at the upper end of the pressure gauge connector 7, the pressure gauge 8 is threadedly connected in the threaded hole, the first sealing ring 12 is provided at the bottom end of the threaded hole, and the pressure gauge 8 presses the first sealing ring 12.

[0024] In some embodiments, the hand wheel 10 is connected to the pressure gauge connector 7 by a connecting screw 13. Specifically, a screw hole 21 matching the connecting screw 13 is provided on the upper side wall of the pressure gauge connector 7, and a through hole 22 matching the connecting screw 13 is provided on the hand wheel 10. In this embodiment, the number of the connecting screws 13 is two, and the two connecting screws 13 are symmetrically arranged along the radial direction of the pressure gauge connector 7.

[0025] In some embodiments, the valve body includes a valve body 14 and a pressure cap 15 connected to the upper end of the valve body 14, and the pressure gauge connector 7 is threadedly connected to the pressure cap 15. Specifically, the pressure cap 15 is threadedly connected to the valve body 14, and a second sealing ring 16 is provided between the pressure cap 15 and the valve body 14.

[0026] A third sealing ring 17 is provided between the inner wall of the pressure cap 15 and the outer wall of the pressure gauge joint 7. Specifically, a groove is provided on the inner wall of the pressure cap 15, and the third sealing ring 17 is arranged in the groove, in contact with the outer wall of the pressure gauge joint 7, to form a sliding seal.

[0027] In some embodiments, the top of the pressure cap 15 is threadedly connected to a limit screw 18, and the pressure gauge connector 7 is provided with a limit boss 19 that matches the limit screw 18. The limit boss 19 can abut against the limit screw 18 to limit the upward movement of the pressure gauge connector 7. The number of the limit screws 18 can be two, and the two limit screws 18 are symmetrically arranged along the radial direction of the pressure cap 15.

[0028] In some embodiments, a safety pressure relief interface communicating with the air inlet 2 is provided on the valve body, and a safety pressure relief device 20 is connected to the safety pressure relief interface.

Claims

1. A gas cylinder valve for a surface air respirator, comprising a valve body, a valve cavity, and an air inlet and an air outlet respectively connected to the valve cavity, a valve seat connected to the air inlet at the bottom of the valve cavity, a valve core capable of abutting against the valve seat in the valve cavity, It is characterized in that The valve core is provided with a through hole connected to the air inlet hole, the valve body is threadedly connected to a pressure gauge joint, the lower end of the pressure gauge joint is fixedly connected to the valve core, and the upper end is connected to a pressure gauge, the pressure gauge joint is provided with an air guide hole connected to the through hole, the outer side of the upper end of the pressure gauge joint is fixedly connected to a hand wheel, the top of the hand wheel is provided with a receiving groove, and the pressure gauge is arranged in the receiving groove.

2. A gas cylinder valve for a surface air respirator according to claim 1, Features: The pressure gauge connector is threadedly connected to the pressure gauge, and a first sealing ring is provided between the pressure gauge connector and the pressure gauge.

3. A gas cylinder valve for a surface air respirator according to claim 1, Features: The hand wheel is connected to the pressure gauge joint via a connecting screw.

4. A gas cylinder valve for a surface air respirator according to claim 3, Features: The upper end side wall of the pressure gauge joint is provided with a screw hole matched with the connecting screw, and the hand wheel is provided with a through hole matched with the connecting screw.

5. A gas cylinder valve for a surface air respirator according to claim 1, Features: The valve body comprises a valve body and a pressure cap connected to the upper end of the valve body, and the pressure gauge connector is threadedly connected to the pressure cap.

6. A gas cylinder valve for a surface air respirator according to claim 5, Features: The pressing cap is threadedly connected to the valve body, and a second sealing ring is arranged between the pressing cap and the valve body.

7. A gas cylinder valve for a surface air respirator according to claim 5, Features: A third sealing ring is provided between the inner wall of the pressure cap and the outer wall of the pressure gauge joint.

8. A gas cylinder valve for a surface air respirator according to claim 5, Features: The top end of the pressure cap is threadedly connected to a limit screw, and the pressure gauge joint is provided with a limit boss matched with the limit screw.

9. A gas cylinder valve for a surface air respirator according to claim 1, Features: The valve body is provided with a safety pressure relief interface which is in communication with the air inlet hole, and the safety pressure relief interface is connected to a safety pressure relief device.

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