CN205315793U - Gaseous relief pressure valve of forward lever - Google Patents

Abstract

The utility model discloses a positive lever type gas decompression valve, which relates to the field of gas decompressors, and comprises a valve body, a flow diversion assembly and a pressure regulation assembly arranged in the valve body, and is characterized in that the valve body is also provided with A lever, one end of the lever is hinged to the pressure regulating assembly, and a movable force transmission push rod is provided between the other end of the lever and the flow distribution assembly, the push rod is located inside the valve body, and the middle part of the lever is hinged to the valve body . The axis of the shunt assembly and the pressure regulating assembly of the utility model intersect vertically, and the vertical movement direction of the pressure regulating assembly is changed to the horizontal movement along the shunt assembly through the L-shaped lever and the ejector rod in the middle, forming a feedback control mode. In terms of shape, this structure reduces the axial length and enhances the adaptability of equipment with compact installation space.

Description

A positive lever type gas pressure reducing valve

technical field

The utility model relates to the field of gas decompressors, in particular to a forward lever type gas decompression valve.

Background technique

A gas pressure reducer is a device that decompresses and regulates the flow of high-pressure gas. The gas pressure reducer is widely used. When the pressure in the high-pressure gas cylinder or pipeline is too high to work, the pressure must be reduced through the pressure reducer to achieve the pressure required for normal use. The pressure reducer not only has the function of reducing pressure, but also has the function of stabilizing the pressure. When the flow rate at the outlet of the gas cylinder or pipeline changes, the pressure reducing and regulating pressure of the pressure reducer can maintain a stable output pressure.

Gas pressure reducing valves are widely used in the gas pipeline system to decompress the high-pressure gas to the required low pressure to meet the needs of the system. In terms of pressure reduction, both the pressure reducing valve and the throttle valve have the function of reducing pressure, reducing the inlet pressure to a certain required outlet pressure; However, because its throttling area is constant, its outlet pressure changes with the inlet pressure and cannot be stabilized to a constant value; the pressure reducing valve relies on its own elastic elements and the energy of the medium to make it throttling The flow area changes with the change of the inlet pressure, and its throttling pressure drop also changes accordingly, keeping the outlet pressure basically unchanged from the surface. In short, the working principle of the pressure reducing valve is throttling. When the gas flows through the gap between the valve and the valve seat, a pressure drop is generated to achieve the purpose of decompression.

Existing diaphragm gas pressure reducers adjust the outlet pressure through the deformation of the diaphragm and the return spring. Generally, a parallel ejector rod is used to connect the shunt valve and the pressure regulating assembly, so that the shunt assembly, ejector rod, The axes of the pressure regulating components are parallel, and the size of the pressure reducing valve in this direction cannot be controlled in a short range, the structure is not compact enough, and the practicability of some equipment with crowded installation space is not strong.

Utility model content

In view of this, the purpose of this utility model is to provide a positive lever type gas pressure reducing valve, which uses a lever to connect the movement of the pressure regulating assembly and the flow distribution assembly, so that the structure of the entire pressure reducing valve is more compact and reliable.

The technical solution adopted to achieve the purpose of this utility model is: a positive lever type gas pressure reducing valve, including a valve body and a flow diversion assembly and a pressure regulation assembly arranged in the valve body, characterized in that the valve body is also provided with There is a lever, one end of the lever is hinged to the pressure regulating assembly, and a movable power transmission push rod is arranged between the other end of the lever and the flow distribution assembly, the push rod is located inside the valve body, and the middle part of the lever is connected to the valve body hinged.

Further, the axis of the flow distribution assembly is perpendicular to the axis of the pressure regulating assembly.

Further, the push rod is slidably arranged on the valve body.

Further, both ends of the ejector rod are spherical.

Further, the diverter assembly includes a diverter valve and a diverter valve seat, and a return spring is provided between the diverter valve seat and the valve body.

Further, a pressure regulating nut is provided on the top of the pressure regulating assembly, and a pressure regulating spring is provided between the pressure regulating assembly and the pressure regulating nut.

Further, the lever is L-shaped, and the hinged position of the lever and the valve body is at the corner of the L-shaped lever.

Further, a safety valve assembly is also included, the safety valve assembly is arranged on one side of the valve body, and the axis of the safety valve assembly is parallel to the axis of the pressure regulating assembly.

The beneficial effects of the utility model:

The utility model has the advantages of simple structure, stable pressure, light weight, convenient adjustment and installation, etc. When the flow rate at the outlet of the gas cylinder or pipeline changes, it can maintain a stable output pressure through the decompression adjustment of the pressure reducer. The overflow function of the safety valve and the opening degree changes at the diverter valve assembly and the diverter valve stabilize the output pressure at the outlet of the pressure reducer.

The axis of the diverter component and the pressure regulator component intersect vertically, and the vertical movement direction of the pressure regulator component is changed to the horizontal movement along the diverter component through the "L"-shaped lever and the ejector rod in the middle, forming a feedback control method. In terms of appearance, this structure reduces the axial length and enhances the adaptability of equipment with compact installation space.

Description of drawings

Fig. 1 is the structural representation of the positive lever type gas pressure reducing valve provided by the utility model;

Fig. 2 is a structural schematic diagram of the forward lever type gas pressure reducing valve pressure regulating assembly provided by the utility model.

In the figure: 1. Inlet joint; 2. Diversion screw; 3. Sealing washer; 4. Sealing rubber ring; 5. Diverter valve seat; 6. Diverter valve; 7. Return spring; Pressure assembly; 10, pressure regulating spring; 11, tight cover; 12, safety valve assembly; 13, valve body; 14, hinge pin; 15, ejector rod; 16, fixed sleeve; 17, outlet; 19. Inner cavity one; 20. Compression nut; 21. Fastening screw; 22. High pressure diaphragm; 23. Lever; 24. Hinged rivet; 25. Shunt assembly.

detailed description

The utility model will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.

Figure 1 shows a positive lever type gas pressure reducing valve provided by the present invention, including a valve body 13, a flow diversion assembly 25 and a pressure regulating assembly 9 arranged in the valve body 13, and a lever is also arranged in the valve body 13 23. One end of the lever 23 is hinged to the pressure regulating assembly 9, and a movable ejector rod 15 is provided between the other end of the lever 23 and the flow distribution assembly 9. The function of the ejector rod 15 is to transmit the force of one end of the lever 23 to the flow distribution assembly 25 , the push rod 15 may not be connected to one end of the lever 23 and the splitter assembly 25, and the transfer is realized only by contact. In this case, the push rod 15 is slidably arranged inside the valve body 13; the push rod 15 may also be hinged at both ends. , In this way, the push rod 15 does not need to be connected with the valve body 13;

Further, the axis of the flow distribution assembly 25 is perpendicular to the axis of the pressure regulating assembly 9 .

Further, the ejector rod 15 is slidably connected with the valve body 13, the fixed sleeve 16 is fixed inside the valve body 13, the ejector rod 15 slides inside the fixed sleeve 16, and the two ends of the ejector rod 15 are only in contact with the splitter assembly 25 and the lever 23 respectively. , That is to say, the two ends of the ejector rod 15 are not connected with the branch assembly 25 and the lever 23 .

Further, the diverter assembly 25 includes a diverter valve 6 and a diverter valve seat 5 , and the diverter valve seat 5 is connected to the valve body 13 through a return spring 7 .

Further, one side of the pressure regulating assembly 9 is provided with a pressure regulating spring 10, and the upper end of the pressure regulating spring 10 is provided with a pressure regulating nut 8, and the pressure regulating nut 8 is threadedly matched with the tight cover 11, and the tight cover 11 is threaded tightly with the valve body 13. Fit tightly, the pressure regulating nut 8 can adjust the tightness of the pressure regulating spring 10, and adjust the set pressure of the air outlet 17.

Further, the lever 23 is "L"-shaped, and the hinged position of the lever 23 and the valve body 13 is at the corner of the "L". One end of the lever 23 is hinged with the adjustment assembly 9 through a hinged rivet 24, and the corner of the lever is hinged by a hinge. The pin 14 is hinged to the valve body 13 .

Further, the safety valve assembly 12 is arranged on one side of the valve body 13 , and the axis of the safety valve assembly 12 is parallel to the axis of the pressure regulating assembly 9 .

Further, both ends of the push rod 15 are spherical.

In this embodiment, the inlet joint 1 is arranged on the left side of the flow diversion assembly 25, the inlet is arranged on the inlet joint 1, and the inlet position is provided with a diversion screw 2, and the gas enters the inner cavity 19 through the diversion screw 2, and the inner cavity 19 The high-pressure gas passes through the gap between the shunt valve 6 and the shunt valve seat 5 to achieve the purpose of decompression, and enters the inner chamber 2 18, and the gas pressure in the inner chamber 2 18 acts on the pressure regulating assembly 9 above, and the pressure regulating assembly The high-pressure diaphragm 22 drives the compression nut 20 and the fastening screw 21 to act on the pressure-regulating spring 10 to reach a state of dynamic balance, so that the pressure of the gas at the outlet 17 is kept in balance; the inner cavity two 18 and the safety valve assembly 12 keep communicating, when running into the pressure in inner cavity two 18 to rise abnormally, safety valve assembly 12 is opened, emits gas, guarantees safety.

The pressure after decompression is adjusted by the pressure regulating assembly 9, mainly as the pressure in the inner chamber 2 18 rises, the pressure regulating assembly 9 is compressed by the pressure of the inner chamber 2 18 to compress the pressure regulating spring 10, because one end of the lever 24 is hinged On the pressure regulating assembly 9, the other end is fixed on the valve body 13 by the hinge pin 14, the lever 23 will rotate around the hinge pin 14, and the rotation of the lever 23 will drive the ejector rod 15 to push the diverter valve seat 6 to move and compress the reset spring 7. The opening of the diversion valve seat 6 and the diversion valve 5 is reduced, so that the balance gas pressure changes to achieve the required working pressure. The safety valve assembly 12 is a pressure relief device and a pressure reducer for maintaining the safe use of the pressure reducer For a faulty signal device, when the output pressure rises to the set outlet pressure value due to damage to the diverter valve assembly 5 or other reasons, the safety valve will automatically open to exhaust, and it will automatically close when the pressure drops to the allowable value.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (8)

1. A positive lever type gas pressure reducing valve, comprising a valve body and a flow diversion assembly and a pressure regulating assembly arranged in the valve body, characterized in that a lever is also arranged in the valve body, and one end of the lever is connected to the pressure regulating assembly. The assembly is hinged, and a movable power transmission push rod is provided between the other end of the lever and the flow distribution assembly, the push rod is located inside the valve body, and the middle part of the lever is hinged with the valve body. 2 . The forward lever type gas pressure reducing valve according to claim 1 , wherein the axis of the flow diverting assembly is perpendicular to the axis of the pressure regulating assembly. 3 . 3. The forward lever type gas pressure reducing valve according to claim 1, wherein the ejector rod is slidably arranged on the valve body. 4. The forward lever type gas pressure reducing valve according to claim 3, characterized in that, both ends of the push rod are spherical. 5 . The forward lever type gas pressure reducing valve according to claim 1 , wherein the diverter assembly includes a diverter valve and a diverter valve seat, and a return spring is provided between the diverter valve seat and the valve body. 6. The forward lever type gas pressure reducing valve according to claim 1, wherein a pressure regulating nut is provided on the top of the pressure regulating assembly, and a pressure regulating nut is provided between the pressure regulating assembly and the pressure regulating nut. spring. 7. The forward lever type gas pressure reducing valve according to claim 1, wherein the lever is L-shaped, and the position where the lever is hinged to the valve body is at the corner of the L-shaped lever. 8. The positive lever type gas pressure reducing valve according to claim 1, further comprising a safety valve assembly, the safety valve assembly is arranged on one side of the valve body, and the axis of the safety valve assembly is aligned with the adjustment The axes of the press components are parallel.