Rapid pressure measuring device for oxygen cylinder

Abstract

The utility model discloses a rapid pressure measuring device for an oxygen bottle, which comprises a pressure measuring pipe, the pressure measuring pipe is connected with an air inlet pipe, and the air inlet pipe is provided with an air inlet end head connected with a threaded nozzle of the oxygen bottle; a pressure gauge and a deflation valve are mounted on the pressure measuring tube, and a pressure relief switch for controlling the deflation valve to open and close is further mounted on the pressure measuring tube; the air inlet end is quickly connected with the screw nozzle of the oxygen bottle, the pressure value in the oxygen bottle can be quickly obtained by opening a bottle valve of the oxygen bottle, the bottle valve is closed after pressure measurement is completed, the pressure relief switch is opened, the pressure in the pressure measuring pipe is released within several seconds, the pressure measurer is disassembled, and the whole pressure measuring process is easy and convenient to operate and high in practicability. Compared with a traditional pressure measuring mode, the pressure measuring efficiency is greatly improved, the working efficiency is improved, an oxygen pressure numerical value is rapidly provided for rescue workers, and precious time is gained for safety technology work and disaster area rescue.

Description

Technical Field

[0001] This utility model relates to the field of pressure detection technology, and in particular to a rapid pressure tester for oxygen cylinders. Background Technology

[0002] Positive pressure oxygen respirators are personal protective equipment for mine rescue teams. They are self-controlled, closed-loop, positive pressure oxygen respirators suitable for polluted or oxygen-deficient atmospheric environments. Spare oxygen cylinders are used to replace the original oxygen cylinder when its pressure is insufficient, allowing continued safe technical work or underground rescue operations. Therefore, ensuring that the oxygen pressure in the spare oxygen cylinder meets the requirements (oxygen pressure greater than 18 MPa) is crucial.

[0003] The traditional method for measuring oxygen pressure in oxygen cylinders involves opening the respirator casing, removing the original oxygen cylinder, installing the cylinder to be measured, opening the valve, observing the pressure reading on the digital pressure gauge, and then removing the original cylinder, reinstalling it, closing the digital pressure gauge, and finally closing the casing. This method is cumbersome and time-consuming. Especially when there are multiple oxygen cylinders, it's impossible to quickly check the pressure. During underground rescue or work requiring cylinder replacement, the inability to quickly determine the oxygen pressure in the spare cylinder delays the replacement, seriously threatening the lives of rescue personnel. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a rapid pressure tester for oxygen cylinders.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: an oxygen cylinder rapid pressure tester, including a pressure testing tube, the pressure testing tube being connected to an air inlet pipe, the air inlet pipe being equipped with an air inlet end connected to a threaded nozzle of an oxygen cylinder; a pressure gauge and a venting valve are installed on the pressure testing tube, and a pressure relief switch for controlling the opening and closing of the venting valve is also installed on the pressure testing tube.

[0006] Preferably, the air inlet end includes an inner threaded ring sleeve rotatably mounted on the air inlet pipe, the inner threaded ring sleeve connecting the air inlet pipe and the nozzle of the oxygen cylinder, and a handwheel is provided on the outer side of the inner threaded ring sleeve; a sealing ring is provided between the air inlet pipe and the nozzle of the oxygen cylinder.

[0007] Preferably, the handwheel includes a wheel body fixedly connected to the inner threaded ring sleeve, and the outer edge of the wheel body has a plurality of anti-slip teeth extending outward along the radius of the wheel body.

[0008] Preferably, the venting valve includes a valve body installed inside the pressure measuring tube, a valve core installed inside the valve body, an air inlet and an air outlet provided on the valve body, the air inlet communicating with the inner cavity of the pressure measuring tube, the air outlet connected to an exhaust pipe passing through the pressure measuring tube, an air passage provided inside the valve core that can connect the air inlet and the air outlet, and a valve core reset device and a valve core limiting device installed inside the valve body.

[0009] Preferably, the valve core reset device includes a reset spring installed between the valve core and the valve body.

[0010] Preferably, the valve core limiting device includes a limiting ring disposed on the inner wall of the valve body for limiting the stroke of the valve core.

[0011] Preferably, the limiting ring includes an exhaust stroke limiting ring and a reset stroke limiting ring.

[0012] Preferably, a sealing ring that mates with the valve core is provided on the inner wall of the valve body; a sealing ring that mates with the valve body is provided on the inner wall of the pressure measuring tube.

[0013] Preferably, the pressure relief switch includes a push rod that extends into the pressure measuring tube and abuts against the valve core at one end.

[0014] Preferably, the pressure relief switch further includes a housing, the push rod is installed inside the housing, one end of the push rod extends into the pressure measuring tube and abuts against the valve core, and the other end of the push rod extends out of the housing; a push rod return spring is installed inside the housing.

[0015] The beneficial effects of this application are as follows:

[0016] The rapid oxygen cylinder pressure tester described in this application includes a pressure testing tube connected to an air inlet pipe, on which an air inlet end is installed that connects to a threaded nozzle on the oxygen cylinder. A pressure gauge and a vent valve are installed on the pressure testing tube, and a pressure relief switch is also installed on the pressure testing tube to control the opening and closing of the vent valve. By quickly connecting the air inlet end to the threaded nozzle of the oxygen cylinder, the internal pressure value of the oxygen cylinder can be quickly obtained by opening the cylinder valve. After pressure testing, the cylinder valve is closed, and the vent valve is opened via the pressure relief switch, releasing the pressure in the pressure testing tube within a few seconds. The pressure tester can then be removed. The entire pressure testing process is simple to operate, and the pressure testing efficiency is greatly improved compared to traditional methods, increasing work efficiency and providing rescue personnel with rapid oxygen pressure values, thus saving valuable time for safety and technical work and disaster relief. Attached Figure Description

[0017] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of the vent valve in the closed state according to an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of the vent valve in the open state according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the pressure relief switch according to an embodiment of the present invention;

[0022] In the diagram: 11-Pressure measuring tube; 12-Inlet pipe; 13-Pressure gauge; 14-Internal threaded sleeve; 15-Handwheel; 2-Pressure relief switch; 21-Push rod; 22-Housing shell; 23-Push rod return spring; 24-Spring limit ring; 25-Pressure plate; 26-Soft rubber sleeve; 31-Valve body; 32-Valve core; 33-Inlet port; 34-Outlet port; 35-Exhaust pipe; 36-Air passage; 37-Reset spring; 38-Exhaust stroke limit ring; 39-Reset stroke limit ring; 4-Sealing ring. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0024] like Figures 1 to 4 As shown, the oxygen cylinder rapid pressure tester includes a pressure testing tube 11, which is connected to an air inlet tube 12. An air inlet end connected to a threaded nozzle of the oxygen cylinder is installed on the air inlet tube 12. A pressure gauge 13 and a venting valve are installed on the pressure testing tube 11. A pressure relief switch 2 for controlling the opening and closing of the venting valve is also installed on the pressure testing tube 11.

[0025] Furthermore, the air inlet end includes an inner threaded sleeve 14 rotatably mounted on the air inlet pipe 12. The inner threaded sleeve 14 connects the air inlet pipe 12 and the nozzle of the oxygen cylinder. A handwheel 15 is provided on the outer side of the inner threaded sleeve 14. A sealing ring 4 is provided between the air inlet pipe 12 and the nozzle of the oxygen cylinder. The sealing ring 4 is installed on the end of the air inlet pipe 12 facing the nozzle. During installation, the end of the air inlet pipe 12 is aligned with the nozzle of the oxygen cylinder, and the sealing ring 4 is located between the two. Rotating the inner threaded sleeve 14 connects its internal threads with the external threads of the nozzle. The inner threaded sleeve 14 drives the air inlet pipe 12 to press against the nozzle, thereby achieving a sealed connection.

[0026] Furthermore, the handwheel 15 includes a wheel body fixedly connected to the inner threaded sleeve 14, and a plurality of anti-slip teeth extending outward along the radius of the wheel body are distributed circumferentially along the outer edge of the wheel body. The corners of the anti-slip teeth are rounded for easy operation.

[0027] Further, the venting valve includes a valve body 31 installed inside the pressure measuring tube 11, a valve core 32 installed inside the valve body 31, an inlet 33 and an outlet 34 provided on the valve body 31, the inlet 33 communicating with the inner cavity of the pressure measuring tube 11, and the outlet 34 connected to an exhaust pipe 35 passing through the pressure measuring tube 11. The valve core 32 has an air passage 36 connecting the inlet 33 and the outlet 34. A valve core 32 reset device and a valve core 32 limiting device are installed inside the valve body 31. The valve core 32 reset device includes a reset spring 37 installed between the valve core 32 and the valve body 31. The valve core 32 limiting device includes a limiting ring disposed on the inner wall of the valve body 31 to limit the stroke of the valve core 32. The limiting ring includes an exhaust stroke limiting ring 38 and a reset stroke limiting ring 39.

[0028] Furthermore, a sealing ring 4 that mates with the valve core 32 is provided on the inner wall of the valve body 31; a sealing ring 4 that mates with the valve body 31 is provided on the inner wall of the pressure measuring tube 11.

[0029] Furthermore, the pressure relief switch 2 includes a push rod 21 that extends into the pressure testing tube 11 and abuts against the valve core 32 at one end. The pressure relief switch 2 also includes a housing 22, within which the push rod 21 is installed. One end of the push rod 21 extends into the pressure testing tube 11 and abuts against the valve core 32, while the other end extends out of the housing 22. A push rod return spring 23 is installed within the housing 22. Specifically, the housing 22 is fixedly connected to the pressure testing tube 11. A spring limiting ring 24 is installed within the housing 22. A pressure plate 25 is fixedly installed on the push rod 21. The push rod return spring 23 is located between the spring limiting ring 24 and the pressure plate 25. A soft rubber sleeve 26 covering the outer end of the push rod 21 is installed on the housing 22. The soft rubber sleeve 26 prevents dust from entering the interior of the pressure relief switch 2 and the vent valve, ensuring cleanliness and thus extending their service life.

[0030] During pressure testing, connect the end of the inlet pipe 12 of the pressure tester to the threaded nozzle of the oxygen cylinder. Rotate the inner threaded ring 14 to connect its internal thread with the external thread of the nozzle. The inner threaded ring 14 drives the inlet pipe 12 to press against the nozzle, achieving a sealed connection under the action of the sealing ring 4. Open the cylinder valve of the oxygen cylinder, and the pressure testing tube 11 connects to the inside of the oxygen cylinder. The pressure gauge 13, which is connected to the inside of the pressure testing tube 11, detects the pressure value of the oxygen cylinder. After reading the pressure value data, the pressure test is completed. Close the cylinder valve of the oxygen cylinder and press the outer end of the push rod 21 of the pressure relief switch 2. The push rod 21 drives the pressure plate 25 to move towards the release valve against the elastic force of the push rod return spring 23. The other end of the push rod 21 pushes the valve core 32 of the release valve to move to the left (e.g., Figure 3 As shown), the air passage 36 on the valve core 32 connects to the air inlet 33 and air outlet 34 of the vent valve. The pressure stored in the pressure measuring tube 11 is discharged through the air inlet 33, air passage 36, air outlet 34 and exhaust pipe 35 of the vent valve. After the vent is discharged, the push rod 21 of the pressure relief switch 2 is released. The push rod 21 is reset under the action of the push rod return spring 23, and the valve core 32 is reset under the action of the return spring 37, and the vent valve is closed. Turn the handwheel 15 to drive the inner threaded sleeve 14 to rotate. The inner threaded sleeve 14 is removed from the threaded nozzle of the oxygen cylinder, the air inlet pipe 12 is disconnected from the threaded nozzle of the oxygen cylinder, and the pressure measuring device is removed.

[0031] Based on years of experience in equipment maintenance and underground coal mining, the inventor designed and developed this rapid oxygen cylinder pressure gauge, drawing on the principle of pressure gauges for single hydraulic supports underground. This pressure gauge is suitable for various applications, enabling rapid measurement of oxygen cylinder pressure. To measure oxygen cylinder pressure, simply connect the rapid pressure gauge to the oxygen cylinder's valve and open the valve to directly read the oxygen pressure inside the cylinder.

[0032] Based on pressure measurement time calculations, this rapid oxygen cylinder pressure gauge improves work efficiency by nearly five times compared to previous measurement methods. The gauge is highly effective, portable, and easy to operate, fundamentally improving measurement efficiency. It features a simple structure, lightweight design, impact resistance, portability, ease of operation, low cost, high quality, and comprehensive functions. Its ease of use and operation significantly shorten oxygen cylinder pressure measurement time, improving work efficiency and providing rescue personnel with rapid oxygen pressure readings, thus saving valuable time for safety and disaster relief efforts.

[0033] The rapid oxygen cylinder pressure tester is readily available, utilizing the pressure regulator and pressure gauge13 from discarded respirators, which can be disassembled and reassembled, resulting in low manufacturing costs. This pressure tester has a wide range of applications, suitable for measuring the pressure of mine rescue teams, fire rescue teams, coal mines, medical facilities, oxygen filling companies, gas manufacturing enterprises, personal oxygen cylinders, and other gas pressures. It is low-cost, high-quality, feature-rich, effective, and easy to promote.

[0034] Significant economic and social (safety production) benefits are achieved by greatly reducing oxygen cylinder pressure measurement time and increasing work efficiency by nearly five times. It enables oxygen cylinder pressure measurement and replacement in the shortest possible time, ensuring oxygen pressure meets requirements and increasing the safety of rescue personnel. Providing accurate oxygen pressure ensures the proper use of respirators and protects the lives of rescue personnel. It buys valuable time for safety technical work and disaster relief, preventing accidents from escalating and reducing casualties and property losses. In commercial and industrial applications, it saves working time, improves work efficiency, reduces expenses for enterprises, and creates production value.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A quick pressure tester for oxygen cylinders, characterized in that: The pressure measuring tube is connected with an air inlet pipe, and an air inlet end is installed on the air inlet pipe and connected with a silk nozzle of an oxygen cylinder.

2. The oxygen cylinder quick pressure gauge as claimed in claim 1, wherein: The air inlet end comprises an inner silk ring installed on the air inlet pipe in a rotating manner, the inner silk ring connects the air inlet pipe and the silk nozzle of the oxygen cylinder, and a hand wheel is arranged outside the inner silk ring.

3. The oxygen cylinder quick pressure gauge as claimed in claim 2, wherein: The hand wheel comprises a wheel body fixedly connected with the inner silk ring, and a plurality of anti-skid teeth extending outward along the radius of the wheel body are distributed on the outer edge of the wheel body.

4. The oxygen cylinder quick pressure gauge as claimed in claim 1, wherein: The air outlet valve comprises a valve body installed in the pressure measuring tube, a valve core is installed in the valve body, an air inlet hole and an air outlet hole are arranged on the valve body, the air inlet hole is communicated with the inner cavity of the pressure measuring tube, an air outlet pipe penetrating through the pressure measuring tube is connected with the air outlet hole, an air channel capable of communicating the air inlet hole and the air outlet hole is arranged in the valve core, a valve core reset device and a valve core limiting device are installed in the valve body.

5. The oxygen cylinder quick pressure gauge as claimed in claim 4, wherein: The valve core reset device comprises a reset spring installed between the valve core and the valve body.

6. The oxygen cylinder quick pressure gauge as claimed in claim 4, wherein: The valve core limiting device comprises a limiting ring arranged on the inner wall of the valve body and used for limiting the stroke of the valve core.

7. The oxygen cylinder quick pressure gauge as claimed in claim 6, wherein: The limiting ring comprises an air outlet stroke limiting ring and a reset stroke limiting ring.

8. The oxygen cylinder quick pressure gauge as claimed in claim 4, wherein: A sealing ring matched with the valve core is arranged on the inner wall of the valve body, and a sealing ring matched with the valve body is arranged on the inner wall of the pressure measuring tube.

9. The oxygen cylinder quick pressure gauge as claimed in claim 4, wherein: The pressure relief switch further comprises a shell, the top rod is installed in the shell, one end of the top rod extends into the pressure measuring tube and abuts against the valve core, the other end of the top rod extends out of the shell, and a top rod reset spring is installed in the shell.

10. The oxygen cylinder quick pressure gauge as claimed in claim 9, wherein: ​

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