CN212986152U

CN212986152U - Natural gas pressure regulating device

Info

Publication number: CN212986152U
Application number: CN202021476667.6U
Authority: CN
Inventors: 李华
Original assignee: Kunming Longruiyiyan Gas Products Distribution Service Co ltd
Current assignee: Kunming Longruiyiyan Gas Products Distribution Service Co ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-04-16
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses a natural gas pressure regulating device belongs to natural gas line transportation equipment technical field, include: casing, pressure regulating component, iris piece, overflow pipe and respiratory orifice component. The natural gas pressure regulating device adopts the breathing opening element capable of automatically closing the breathing opening, and can automatically close the breathing opening to prevent air leakage under the condition that the wearing part leather diaphragm is damaged and leaks air, thereby avoiding dangers such as explosion and the like. Meanwhile, the breathing opening element is provided with an indicating sheet, and a warning sign can be popped up after the breathing opening is automatically closed when the diaphragm is damaged, so that the examination is easy. The breathing opening component is welded with a nut and provided with threads, so that the breathing opening component is convenient to install and replace. The internal valve plate is an inclined mechanism, an object falling in the breathing opening channel can naturally slide down to reduce blockage, and the pressing indication piece can also dredge the breathing opening and prevent the problem of blockage of the breathing opening.

Description

Natural gas pressure regulating device

Technical Field

The utility model belongs to the technical field of natural gas line transportation equipment, specifically speaking relates to a natural gas pressure regulating device.

Background

A natural gas pressure regulator is a device that can maintain a stable downstream pressure regardless of changes in the flow rate of gas and the upstream pressure. Although the technology of the existing natural gas pressure regulator is mature, regular inspection and maintenance are still needed, because some vulnerable parts such as a sealing ring and a leather diaphragm exist in the pressure regulator, the pressure regulator is easily affected by high temperature or corrosion, wherein the influence of damaged and broken leather diaphragm is serious, which can cause the pressure of the outlet of the pressure regulator to rise, the valve port of the pressure regulator not to be opened, the air leakage of the pressure regulator and other problems, and the damage of the leather diaphragm causes the air leakage problem of the pressure regulator to cause very serious consequences under the condition that the inspector does not find the air leakage problem in time.

In the existing natural gas pressure regulating device, no device can effectively solve the problem of gas leakage prevention after the leather diaphragm is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: provides a natural gas pressure regulating device which can automatically close a breathing hole to prevent air leakage under the condition that a diaphragm is damaged so as to solve the existing problems.

In order to realize the purpose, the utility model discloses a technical scheme be:

a breathing port which can be automatically closed after air leakage is designed on a shell of the natural gas pressure regulating device.

Provided is a natural gas pressure regulating device, including: casing, pressure regulating component, iris piece, overflow pipe, respiratory component includes: the body, go out the gauze mask, weld nut, the window framework of ventilating, a spring, movable valve board and instruction piece, the window framework of ventilating is connected in the body below, movable valve board includes vertical pole and two boards in the bottom, vertical pole is located the body, two boards in the bottom are located the window frame body of ventilating, two boards in the bottom of movable valve board downward sloping respectively, the body bottom is the slope structure also, the instruction piece is fixed at vertical pole top, bottom in the middle of the movable valve board is connected to spring one end, the upper surface of ventilation window framework bottom frame wall is connected to the other end. The outlet cover is positioned at the top of the tube body.

The indicating sheet is divided into two parts with different colors, the indicating sheet penetrates through the outlet cover, the lower part of the indicating sheet is arranged in the outlet cover when the spring is in a normal state, and the upper part of the indicating sheet is arranged outside the outlet cover.

The welding nut is welded on the step in the middle of the pipe wall, and the outer side of the middle of the pipe body is provided with threads.

The breathing opening element is positioned on the shell on the upper side of the leather diaphragm, the ventilation window frame body is arranged in the shell, and the welding nut is arranged outside the shell.

The two plates at the bottom of the movable valve plate extend out of the ventilation window frame towards two sides respectively.

Since the technical scheme is used, the beneficial effects of the utility model are that: the natural gas pressure regulating device adopts the breathing opening element capable of automatically closing the breathing opening, and can automatically close the breathing opening to prevent air leakage under the condition that the wearing part leather diaphragm is damaged and leaks air, thereby avoiding dangers such as explosion and the like. Meanwhile, the breathing opening element is provided with the indicating sheet, the warning mark can be popped out after the skin membrane is damaged and the breathing opening is automatically closed, so that the skin membrane is easy to check, the breathing opening element is welded with the nut and provided with the thread, and the breathing opening element is convenient to install and replace. The internal valve plate is an inclined mechanism, an object falling in the breathing opening channel can naturally slide down to reduce blockage, and the pressing indication piece can also dredge the breathing opening and prevent the problem of blockage of the breathing opening.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of the natural gas pressure regulating device.

FIG. 2 is an enlarged cross-sectional view of the respiratory component.

Reference numerals: 1-shell, 2-pressure regulating element, 3-diaphragm, 4-overflow pipe, 5-respiratory orifice element, 6-pipe, 7-outlet mask, 8-welding nut, 9-ventilation window frame, 10-spring, 11-movable valve plate, 12-indicator piece, 13-vertical rod, 14-two bottom plates.

Detailed Description

Referring to fig. 1, there is provided a natural gas pressure regulating device including: the device comprises a shell 1, a pressure regulating element 2, a diaphragm 3, an over-flow tube 4 and a respiratory orifice element 5. The natural gas regulator principle is for controlling the size of flow opening through regulating element 2, thereby two pipe pressure of velocity of flow adjustment are controlled, in order to prevent the too big and holding pressure stability of gas pressure of outlet duct after the pressure regulating, be equipped with in the cavity that overfall pipe 4 feeds through under the endothelial diaphragm 3 of natural gas regulator, the leather diaphragm 3 is fixed on regulating element 2, the too big leather diaphragm 3 that can make of pressure after the pressure regulating moves up, thereby make regulating element 2 shift up make the circulation mouth lead to the fact the gas surface to reduce, make the gas outlet velocity of flow reduce at last. The cavity intercommunication outlet duct under the diaphragm 3 is unanimous with outlet duct pressure, and 3 top cavities of diaphragm are equipped with the mouth of breathing, and with outside air intercommunication, if the diaphragm 3 takes place the damage, the gas of revealing can be followed the mouth of breathing and flowed.

Referring to fig. 2, the breathing opening element 5 comprises: the device comprises a pipe body 6, an outlet cover 7, a welding nut 8, a ventilation window frame body 9, a spring 10, a movable valve plate 11 and an indicating sheet 12. The respiratory component 5 is positioned on the shell 1 above the diaphragm 3, the ventilation window frame 9 is arranged in the shell 1, and the welding nut 8 is arranged outside the shell 1.

The ventilation window frame 9 is connected below the tube body 6, and the ventilation window is a passage for air in the cavity above the diaphragm 3 to flow into the breathing opening element 5.

The movable valve plate 11 comprises a vertical rod 13 and a bottom two-plate 14, the vertical rod 13 is located in the tube body 6, the bottom two-plate 14 is located in the ventilation window frame body 9, the bottom two-plate 14 of the movable valve plate 11 inclines downwards respectively, the bottom of the tube body 6 is also of an inclined structure, the two inclined planes are parallel to each other, and the inclined structure has the advantage that objects falling in the breathing opening channel can naturally slide down to reduce blockage.

The principle of the automatic closing of the breathing opening element 5:

if the diaphragm 3 is damaged, a large amount of gas flows out of the breathing opening channel at once, the pressure at the place with higher flow rate is smaller, and pressure difference is formed between the breathing opening channel and the place with higher surrounding pressure, because the movable valve plate 11 in the breathing opening element 5 is a movable part, the pressure generated by the pressure difference can cause the movable valve plate 11 to move upwards and stick to the inclined surface at the bottom of the tube body 6, so that the breathing opening channel is closed, and gas leakage is prevented. Because the inner chamber is communicated with the air outlet pipe, the pressure difference is continuous, the movable valve plate 11 can be continuously attached to the inclined surface at the bottom of the pipe body 6 under the action of the pressure, and the gas leakage is continuously prevented.

Bottom in the middle of movable valve plate 11 is connected to spring 10 one end, and the upper surface of the frame wall in the bottom of louver framework 9 is connected to the other end, because at the natural gas pressure regulating device during operation, also can follow the mouth of a breath discharge and inhale gas, also can make movable valve plate 11 move up, but the gas velocity of flow that the during operation produced is less, sets up spring 10, can not make movable valve plate 11 close the mouth of a breath passageway when making work produce the gas of low velocity of flow, does not influence natural gas pressure regulating device and normally works.

The outlet cover 7 is positioned on the top of the tube body 6 to prevent falling objects from entering the breathing opening device, and a strip-shaped hole for the indicator piece 12 to pass through is arranged above the outlet cover 7. The indicator panel 12 is fixed on the top of the vertical rod 13, the indicator panel 12 is divided into two parts with different colors, the indicator panel 12 penetrates through the outlet cover 7, the lower part of the indicator panel 12 is arranged in the outlet cover 7 when the spring 10 is in a normal state, and the upper part of the indicator panel is arranged outside the outlet cover 7. When the diaphragm 3 is damaged, the movable valve plate 11 moves upwards to close the breathing opening channel, the indicating sheet 12 fixed on the top of the movable valve plate 11 also moves upwards, and the lower part is preferably red, so that the red mark of the lower part is exposed to indicate that the breathing opening is closed and the fault is generated.

Because the spring 10 is arranged at the bottom of the movable valve plate 11, the connected indicating sheet 12 can be pressed or pulled, so that the breathing opening can be dredged, and the problem of blockage of the breathing opening can also be prevented.

The welding nut 8 is welded on a step in the middle of the pipe wall, the outer side of the middle of the pipe body 6 is provided with threads, the breathing hole element 5 is in threaded connection with the natural gas pressure regulating device shell 1, and the welding nut 8 enables the breathing hole element 5 to be more convenient and easier to replace when being installed, is one of installation mode embodiments, and can also be in a direct welding mode or other connection modes which are easily obtained by technicians in the field.

The two plates 14 at the bottom of the movable valve plate 11 extend to the outside of the ventilation window frame 9 towards two sides respectively, so that sundries falling onto the movable valve plate 11 can fall to the lower part instead of the ventilation window frame 9.

Claims

1. A natural gas pressure regulating device comprising: the device comprises a shell (1), a pressure regulating element (2), a leather diaphragm (3), an overflow pipe (4) and a breathing opening element (5);

characterized in that the breathing opening element (5) comprises: body (6), play gauze mask (7), welded nut (8), louver framework (9), spring (10), activity valve plate (11) and instruction piece (12), louver framework (9) are connected in body (6) below, activity valve plate (11) include vertical pole (13) and two boards in the bottom (14), vertical pole (13) are located body (6), two boards in the bottom (14) are located louver framework (9), two boards in the bottom (14) of activity valve plate (11) downward sloping respectively, body (6) bottom also is the slope structure, instruct piece (12) to fix at vertical pole (13) top, bottom in the middle of movable valve plate (11) is connected to spring (10) one end, the upper surface of louver framework (9) bottom frame wall is connected to the other end.

2. The natural gas pressure regulating device according to claim 1, wherein the outlet cover (7) is located on top of the pipe body (6).

3. The natural gas pressure regulating device according to claim 1, wherein the indicating sheet (12) is divided into two parts with different colors, the indicating sheet (12) penetrates through the outlet cover (7), the indicating sheet (12) is partially arranged in the outlet cover (7) when the spring (10) is in a normal state, and the upper part of the indicating sheet is arranged outside the outlet cover (7).

4. The natural gas pressure regulating device according to claim 1, wherein the welding nut (8) is welded on a step in the middle of the pipe wall, and threads are arranged on the outer side of the middle of the pipe body (6).

5. The natural gas pressure regulating device according to claim 1, wherein the breathing orifice element (5) is located on the housing (1) above the diaphragm (3), the vent frame (9) is inside the housing (1), and the weld nut (8) is outside the housing (1).

6. The natural gas pressure regulating device according to claim 1, wherein the two plates (14) at the bottom of the movable valve plate (11) extend to the outside of the ventilation window frame body (9) towards two sides respectively.