Turn-off pressure relief mechanism of high pressure reducer

Abstract

The shutoff pressure relief mechanism comprises an upper valve body, a lower valve body, a diaphragm, a rotating cap, a screw rod, a steel ball, a hollow shaft, a first spring, a valve sleeve, a sealing sliding block, a valve element and a reset spring. The pressure relief valve is kept airtight at the opening position, the pressure relief channel is opened at the closing position, gas at the low-pressure end is released, and the closing pressure relief function is achieved. According to the scheme, the original pressure reduction function of the pressure reducer is reserved, and meanwhile the function of automatic pressure relief at the turn-off position is achieved. The turn-off pressure relief mechanism is reliable in structure, good in sealing performance and high in safety, when the on-off switch of the pressure reducer is in the turn-off position, the pressure relief valve can be opened for pressure relief, and oxygen at the low-pressure end is quickly released.

Description

Technical Field

[0001] The invention relates to the technical field of gas pressure reducing devices and provides a high pressure pressure reducing device shut-off pressure relief mechanism. Background Art

[0002] The structure of the current pressure reducer consists of a reset spring, a valve, a push rod, a hard core, a pressure regulating spring, a switch, a pressure-sensitive diaphragm, and a shell. High-pressure gas enters chamber B from the inlet of the pressure reducer and enters chamber A through the gap between the valve and the seat opening in the shell. When the switch in the pressure reducer is turned on, the pressure regulating spring is compressed, and the hard core, the pressure-sensitive diaphragm, and the push rod are pressed down to open the valve, and the gas in chamber B flows into chamber A; when the pressure reducer outputs low pressure and there is no flow, the pressure in chamber A gradually increases, and the gas force of the pressure-sensitive diaphragm increases accordingly. When the gas force of the pressure-sensitive diaphragm and the pressure regulating spring force reach a balance, the push rod and the valve move up to close the valve, and the gas in chamber B no longer enters chamber A; when there is flow output at the low-pressure outlet of the pressure reducer, the pressure in chamber A drops, the gas force of the pressure-sensitive diaphragm decreases, and the balance between the pressure regulating spring force and the pressure-sensitive diaphragm gas force is broken, causing the push rod to move down and reopen the valve, so that the gas in chamber B flows into chamber A again and maintains a new balance at a fixed output flow.

[0003] When the pressure reducer switch is turned off, the valve is closed, and the gas in chamber B no longer enters chamber A. At this time, the gas in the low-pressure end of chamber A cannot be discharged. The disadvantages of the above pressure reducer structure are as follows:

[0004] First, there is a certain pressure of gas in the low-pressure chamber of the pressure reducer, and the diaphragm parts are under continuous pressure, which reduces the service life of the diaphragm parts. If the diaphragm parts are fatigued and ruptured, it will directly affect the safety of use;

[0005] Second: In order to ensure that the residual pressure in the low-pressure chamber can be discharged, it is necessary to add a low-pressure chamber exhaust valve at the output end. This solution not only increases the back-end product configuration and the overall use cost, but also increases the operating steps for users. It is relatively low in terms of human-machine efficiency design. At the same time, this solution is easily affected by human factors, causing users to forget to open or close the exhaust valve, resulting in air leakage and failure to discharge the low-pressure end pressure. Summary of the invention

[0006] The purpose of the present invention is: in view of the above problems, the high-pressure pressure reducer of the present invention shuts off the pressure relief mechanism, which can release the gas in the low-pressure chamber safely and reliably while ensuring the pressure reduction function of the existing pressure reducer.

[0007] The technical solution of the present invention is:

[0008] A high-pressure pressure reducer shutoff and pressure relief mechanism is provided. The shutoff and pressure relief mechanism is composed of a pressure reducing valve, a pressure releasing valve, a pressure regulating spring and a pressure sensing diaphragm.

[0009] Provided is a high-pressure pressure reducer shut-off pressure relief mechanism, comprising an upper valve body 3, a lower valve body 1, a diaphragm 2, a rotating cap 5, a screw 9, a steel ball 10, a hollow shaft 4, a first spring 12, a valve sleeve 14, a sealing slider 13, a valve core 7 and a reset spring 6;

[0010] The upper valve body is fixedly connected to the lower valve body, and the diaphragm is arranged between the upper and lower valve bodies, an upper cavity is formed between the upper valve body and the diaphragm, and a closed lower cavity is formed between the diaphragm and the lower valve body;

[0011] The rotating cap 5 is fixed to the screw 9 as a whole, and the screw 9 is threadedly matched with the upper valve body. Rotating the rotating cap can make the screw move axially up and down;

[0012] The hollow shaft and the center of the diaphragm are in sliding sealing cooperation, a steel ball is arranged between the upper end of the hollow shaft and the lower end of the screw, and the downward movement of the screw can push the hollow shaft to move through the steel ball; a first spring is sleeved on the hollow shaft, and the first spring provides elastic force between the center of the diaphragm and the hollow shaft;

[0013] A valve sleeve 14 is fixedly installed in the lower chamber, and the valve sleeve has a working port, a high-pressure port and a low-pressure port, and valve ports are respectively opened on the lower valve body corresponding to the high-pressure port and the low-pressure port; the working port is located in the lower chamber; the upper chamber is not a sealed chamber and communicates with the outside of the upper valve body;

[0014] The lower end of the hollow shaft extends into the lower cavity, and the lower end of the hollow shaft extends to the working port of the valve sleeve; a valve core is slidably arranged in the valve sleeve, and the lower valve body is provided with a return spring, and the return spring provides elastic force for the valve core; a sealing slider is arranged between the lower end of the hollow shaft and the valve core; when the hollow shaft moves downward, it can push the sealing slider and synchronously push the valve core to open, so that the high-pressure port is connected with the low-pressure port, and when the hollow shaft moves upward, the return spring pushes the valve core to reset, so that the high-pressure port is cut off from the low-pressure port; a channel is opened on the lower valve body from the low-pressure port to the lower cavity, so that the low-pressure port is connected with the lower cavity; the working port of the valve sleeve is also provided with a radial limit, which is used to limit the sealing slider in the working port, and when the hollow shaft moves upward, it is ensured that the sealing slider is separated from the lower end of the hollow shaft to generate a gap, so that the lower cavity is connected with the hollow shaft; the part of the hollow shaft located in the upper cavity is provided with a radial hole, so that the upper cavity, the hollow shaft and the lower cavity are connected.

[0015] Furthermore, the rotating cap 5 and the screw rod 9 are fixed as a whole by means of bolts 8 .

[0016] Furthermore, a force transmission pin is provided between the valve core and the return spring. The force transmission pin is fixedly connected to the return spring and abuts against the valve core.

[0017] Furthermore, the upper end of the hollow shaft is a closed end.

[0018] Furthermore, the upper end of the hollow shaft is closed by a plunger.

[0019] Furthermore, a ball groove is formed at the lower end of the screw, and a ball socket 11 is formed at the plunger at the upper end of the hollow shaft.

[0020] The advantages of the present invention are as follows: the present invention can realize rapid and accurate positioning of the composite material forming mold frame and the template combination blank during processing, and no manual repair and polishing is required after processing, thereby improving product quality and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the current pressure relief mechanism;

[0022] Figure 2 It is a schematic diagram of the pressure reducing mechanism of the high pressure pressure reducer of the present invention;

[0023] Figure 3 A schematic diagram of the working of the present invention (partially enlarged);

[0024] Among them: lower valve body 1, diaphragm 2, upper valve body 3, hollow shaft 4, rotating cap 5, reset spring 6, valve core 7, bolt 8, screw 9, steel ball 10, plunger 11, first spring 12, sealing slider 13, valve sleeve 14. DETAILED DESCRIPTION

[0025] The disclosed examples will be more fully described with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described and these examples should not be construed as limited to the examples set forth herein. Instead, these examples are described so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art.

[0026] A high-pressure pressure reducer shutoff and pressure relief mechanism is provided. The shutoff and pressure relief mechanism is composed of a pressure reducing valve, a pressure releasing valve, a pressure regulating spring and a pressure sensing diaphragm.

[0027] Provided is a high-pressure pressure reducer shut-off pressure relief mechanism, comprising an upper valve body 3, a lower valve body 1, a diaphragm 2, a rotating cap 5, a screw 9, a steel ball 10, a hollow shaft 4, a first spring 12, a valve sleeve 14, a sealing slider 13, a valve core 7 and a reset spring 6;

[0028] The upper valve body is fixedly connected to the lower valve body, and the diaphragm is arranged between the upper and lower valve bodies, an upper cavity is formed between the upper valve body and the diaphragm, and a closed lower cavity is formed between the diaphragm and the lower valve body;

[0029] The rotating cap 5 is fixed to the screw 9 as a whole, and the screw 9 is threadedly matched with the upper valve body. Rotating the rotating cap can make the screw move axially up and down;

[0030] The hollow shaft and the center of the diaphragm are in sliding sealing cooperation, a steel ball is arranged between the upper end of the hollow shaft and the lower end of the screw, and the downward movement of the screw can push the hollow shaft to move through the steel ball; a first spring is sleeved on the hollow shaft, and the first spring provides elastic force between the center of the diaphragm and the hollow shaft;

[0031] A valve sleeve 14 is fixedly installed in the lower chamber, and the valve sleeve has a working port, a high-pressure port and a low-pressure port, and valve ports are respectively opened on the lower valve body corresponding to the high-pressure port and the low-pressure port; the working port is located in the lower chamber; the upper chamber is not a sealed chamber and communicates with the outside of the upper valve body;

[0032] The lower end of the hollow shaft extends into the lower cavity, and the lower end of the hollow shaft extends to the working port of the valve sleeve; a valve core is slidably arranged in the valve sleeve, and the lower valve body is provided with a return spring, and the return spring provides elastic force for the valve core; a sealing slider is arranged between the lower end of the hollow shaft and the valve core; when the hollow shaft moves downward, it can push the sealing slider and synchronously push the valve core to open, so that the high-pressure port is connected with the low-pressure port, and when the hollow shaft moves upward, the return spring pushes the valve core to reset, so that the high-pressure port is cut off from the low-pressure port; a channel is opened on the lower valve body from the low-pressure port to the lower cavity, so that the low-pressure port is connected with the lower cavity; the working port of the valve sleeve is also provided with a radial limit, which is used to limit the sealing slider in the working port, and when the hollow shaft moves upward, it is ensured that the sealing slider is separated from the lower end of the hollow shaft to generate a gap, so that the lower cavity is connected with the hollow shaft; the part of the hollow shaft located in the upper cavity is provided with a radial hole, so that the upper cavity, the hollow shaft and the lower cavity are connected.

[0033] The rotating cap 5 and the screw rod 9 are fixed as a whole by means of bolts 8 .

[0034] A force transmission pin 11 is further provided between the valve core and the return spring. The force transmission pin is fixedly connected to the return spring and abuts against the valve core.

[0035] The upper end of the hollow shaft is a closed end.

[0036] The upper end of the hollow shaft is closed by a plunger.

[0037] The lower end of the screw rod forms a ball groove, and the plunger at the upper end of the hollow shaft forms a ball socket 11.

[0038] The description of different advantageous arrangements has been presented for purposes of illustration and description, but the description is not intended to be exclusive or limited to examples of the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. Additionally, different advantageous examples may describe different advantages over other advantageous examples. The selected example or examples are chosen and described in order to best illustrate the principles of the examples, the practical application, and to enable those of ordinary skill in the art to understand the disclosure with various examples with various modifications suitable for the particular use contemplated.

Claims

1. A high pressure pressure reducer shut-off pressure relief mechanism, characterized in that: It includes an upper valve body, a lower valve body, a diaphragm, a rotating cap, a screw, a steel ball, a hollow shaft, a first spring, a valve sleeve, a sealing slider, a valve core and a reset spring; The upper valve body is fixedly connected to the lower valve body, and the diaphragm is arranged between the upper and lower valve bodies, an upper cavity is formed between the upper valve body and the diaphragm, and a closed lower cavity is formed between the diaphragm and the lower valve body; The rotating cap is fixed to the screw rod as a whole, the screw rod and the upper valve body are threadedly matched, and rotating the rotating cap can cause the screw rod to move axially up and down; The hollow shaft and the center of the diaphragm are in sliding sealing cooperation, a steel ball is arranged between the upper end of the hollow shaft and the lower end of the screw, and the downward movement of the screw can push the hollow shaft to move through the steel ball; a first spring is sleeved on the hollow shaft, and the first spring provides elastic force between the center of the diaphragm and the hollow shaft; A valve sleeve is fixedly installed in the lower chamber, and the valve sleeve is provided with a working port, a high-pressure port and a low-pressure port, and valve ports are respectively provided on the lower valve body corresponding to the high-pressure port and the low-pressure port; the working port is located in the lower chamber; the upper chamber is not a sealed chamber and is communicated with the outside of the upper valve body; The lower end of the hollow shaft extends into the lower cavity, and the lower end of the hollow shaft extends to the working port of the valve sleeve; a valve core is slidably arranged in the valve sleeve, and the lower valve body is provided with a return spring, and the return spring provides elastic force for the valve core; a sealing slider is arranged between the lower end of the hollow shaft and the valve core; when the hollow shaft moves downward, it can push the sealing slider and synchronously push the valve core to open, so that the high-pressure port is connected with the low-pressure port, and when the hollow shaft moves upward, the return spring pushes the valve core to reset, so that the high-pressure port is cut off from the low-pressure port; a channel is opened on the lower valve body from the low-pressure port to the lower cavity, so that the low-pressure port is connected with the lower cavity; the working port of the valve sleeve is also provided with a radial limit, which is used to limit the sealing slider in the working port, and when the hollow shaft moves upward, it is ensured that the sealing slider is separated from the lower end of the hollow shaft to generate a gap, so that the lower cavity is connected with the hollow shaft; the part of the hollow shaft located in the upper cavity is provided with a radial hole, so that the upper cavity, the hollow shaft and the lower cavity are connected.

2. A high pressure reducer shut-off pressure relief mechanism according to claim 1, characterized in that: The rotating cap and the screw rod are fixed as one body through bolts.

3. A high pressure reducer shut-off pressure relief mechanism according to claim 1, characterized in that: A force transmission pin is also provided between the valve core and the return spring. The force transmission pin is fixedly connected to the return spring and abuts against the valve core.

4. A high pressure reducer shut-off pressure relief mechanism according to claim 1, characterized in that: The upper end of the hollow shaft is a closed end.

5. A high pressure reducer shut-off pressure relief mechanism as claimed in claim 4, characterized in that: The upper end of the hollow shaft is closed by a plunger.

6. A high pressure reducer shut-off pressure relief mechanism according to claim 5, characterized in that: The lower end of the screw rod forms a ball groove, and the plunger at the upper end of the hollow shaft forms a ball socket.

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