CN112682552A

CN112682552A - Pressure reducing valve for liquefied petroleum gas

Info

Publication number: CN112682552A
Application number: CN201910988624.1A
Authority: CN
Inventors: 不公告发明人
Original assignee: Xi'an Jingqun Material Technology Co ltd
Current assignee: Xi'an Jingqun Material Technology Co ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2021-04-20

Abstract

The invention relates to the technical field of pressure reducing valves, and discloses a liquefied petroleum gas pressure reducing valve, which solves the problems that the existing pressure reducing valve cannot automatically seal an air inlet end after the burner end is closed, so that air pressure is unstable, fragments are damaged, and gas output is unstable; through rotating the end cap, adjust the second spring up-and-down motion, and then promote the lower guide arm up-and-down motion, guaranteed the balance between lower guide arm and the upper guide arm, keep balance between seal mouth pad and the gas outlet promptly for gas switches on smooth and easy invariable output pressure.

Description

Pressure reducing valve for liquefied petroleum gas

Technical Field

The invention belongs to the technical field of pressure reducing valves, and particularly relates to a liquefied petroleum gas pressure reducing valve.

Background

The pressure reducing valve is a valve which reduces the inlet pressure to a certain required outlet pressure through regulation and leads the outlet pressure to be automatically kept stable by relying on the energy of the medium.

The current relief pressure valve for pipeline atmospheric pressure increases if the combustion apparatus end is closed the back, and like this, the inside diaphragm below atmospheric pressure of valve body increases gradually, and the inlet end can not seal, and then causes the diaphragm damaged, and the security is lower, and in addition, current relief pressure valve is when the air current circulation, and gas output is unstable.

Disclosure of Invention

In view of the above situation, in order to overcome the defects of the prior art, the invention provides a pressure reducing valve for liquefied petroleum gas, which effectively solves the problems that the existing pressure reducing valve cannot automatically seal the gas inlet end after the gas burner end is closed, so that the gas pressure is unstable, fragments are damaged, and the gas output is unstable.

In order to achieve the purpose, the invention provides the following technical scheme: a liquefied petroleum gas pressure reducing valve comprises a valve body, wherein one end of the valve body is connected with an air inlet pipeline, one end of the air inlet pipeline is connected with a leakage-proof gasket, one end of the air inlet pipeline, far away from the leakage-proof gasket, is provided with an air outlet relative to the inside of the valve body, the outer end of the air inlet pipeline is sleeved with a threaded connector, one end of the threaded connector is fixedly connected with a hand wheel, the other end of the valve body is connected with an air outlet pipeline, the upper end of the valve body is provided with a valve cover, a diaphragm is connected between the valve cover and the valve body, the middle part of the top end of the valve cover is connected with a knob, the middle part of the lower end of the knob is provided with a groove, the groove is internally connected with a first spring, the lower, the middle part of the lower end of the valve body is connected with a fixed sleeve, the inner part of the fixed sleeve is in threaded connection with a plug, and a second spring is connected between the upper end of the plug and the lower end of the lower guide rod.

Preferably, a pressure gauge for detecting pressure is installed on one side of the upper end of the air inlet pipeline.

Preferably, the valve cover is fixedly connected with the valve body through a screw, and the upper end of the valve cover is provided with a sinking groove relative to the screw connecting end.

Preferably, the outer end of the plug is provided with anti-slip lines, and the middle part of the lower end of the plug is provided with a straight groove.

Preferably, the two ends of the second spring are connected with positioning blocks relative to the middle part of the upper end of the plug and the middle part of the lower end of the lower guide rod.

Preferably, the valve body and the valve cover are both sprayed with rust-proof coatings for preventing rust.

Preferably, one side of the upper end of the valve cover is provided with a pressure relief hole for pressure relief.

Compared with the prior art, the invention has the beneficial effects that:

(1) according to the invention, through the arrangement of the fixed sleeve, the plug and the second spring, when the burner end is closed, the air pressure at the lower part of the diaphragm is greater than the air pressure at the upper part, and the lower guide rod moves upwards under the elastic force of the second spring, so that the cross rod drives the mouth sealing pad to block the air outlet, the diaphragm damage caused by the large air pressure in the valve body is effectively avoided, and the safety is improved;

(2) the second spring is adjusted to move up and down by rotating the plug, so that the lower guide rod is pushed to move up and down, the balance between the lower guide rod and the upper guide rod is ensured, namely the balance between the nozzle sealing pad and the air outlet is kept, and the gas conduction output pressure is smooth and constant;

(3) through threaded connection mode mounting structure for it is convenient to dismantle between end cap and the valve body, thereby conveniently changes the second spring, avoids long-term the use to cause its elastic potential energy to reduce.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged schematic view of A of FIG. 2 according to the present invention;

in the figure: 1. a valve body; 2. an air intake duct; 3. a leak-proof gasket; 4. an air outlet; 5. a threaded interface; 6. a hand wheel; 7. an air outlet pipe; 8. a valve cover; 9. a membrane; 10. a knob; 11. a groove; 12. a first spring; 13. an upper guide rod; 14. a lower guide rod; 15. a cross bar; 16. a strut; 17. a mouth sealing pad; 18. fixing a sleeve; 19. a plug; 20. a second spring; 21. a pressure gauge; 22. a screw; 23. a straight slot; 24. positioning blocks; 25. a pressure relief vent.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the first embodiment, as shown in fig. 1, 2 and 3, the present invention includes a valve body 1, one end of the valve body 1 is connected with an air inlet pipe 2 for the entry of liquefied petroleum gas, one end of the air inlet pipe 2 is connected with a leakage-proof gasket 3 for sealing, one end of the air inlet pipe 2, which is away from the leakage-proof gasket 3, is provided with an air outlet 4 relative to the interior of the valve body 1 for the entry of liquefied petroleum gas into the valve body 1 from the air outlet 4, the outer end of the air inlet pipe 2 is sleeved with a nipple 5, one end of the nipple 5 is fixedly connected with a hand wheel 6 for driving the nipple 5 to be connected with a gas pipe by rotating the hand wheel 6, the other end of the valve body 1 is connected with an air outlet pipe 7 for discharging gas and conveying the gas to a burner end for combustion, a valve cover 8 is installed on the upper end of the valve, a first spring 12 is connected inside the groove 11, an upper guide rod 13 is connected to the lower end of the first spring 12, the upper guide rod 13 is connected to the middle of the upper end of the diaphragm 9, the first spring 12 downwardly presses the upper guide rod 13 by rotating the knob 10, the lower guide rod 14 downwardly moves, the cross rod 15 rotates around a support rod 16, a nozzle sealing pad 17 is separated from the gas outlet 4, the gas outlet 4 is opened, the liquefied petroleum gas is conducted, the lower guide rod 14 is connected to the middle of the lower end of the diaphragm 9, the cross rod 15 is movably connected to the lower portion of the lower guide rod 14, the cross rod 15 is rotatably connected to the lower end of the valve body 1 by the support rod 16, one end of the cross rod 15 is connected to the nozzle sealing pad 17, the nozzle sealing pad 17 is positioned at the upper end of the gas outlet 4, a fixed sleeve 18 is connected to the middle of the lower end of the valve, the lower guide rod 14 is pushed upwards by the sealing device, so that the balance between the lower guide rod 14 and the upper guide rod 13 is ensured, namely the balance between the sealing gasket 17 is kept, and the gas conduction output pressure is smooth and constant.

In the second embodiment, on the basis of the first embodiment, a pressure gauge 21 for detecting pressure is installed at one side of the upper end of the air inlet pipe 2.

Third, on the basis of embodiment one, valve gap 8 and valve body 1 pass through screw 22 fixed connection, and valve gap 8 upper end has seted up heavy groove for screw 22 link, through screw 22 connected mode, can quick assembly disassembly relief pressure valve, and the easy access is maintained, and the setting in heavy groove is convenient for hold screw 22 head, avoids protruding valve gap 8.

Fourth embodiment, on the basis of first embodiment, the outer end of end cap 19 has seted up anti-skidding line, and end cap 19 lower extreme middle part has seted up a word groove 23, through the setting in a word groove 23, the end cap 19 of being convenient for is twisted by the screwdriver and is moved the fastening, and convenient to detach, and anti-skidding line can increase the friction with the hand.

Fifth, on the basis of the first embodiment, the two ends of the second spring 20 are connected with the positioning blocks 24 respectively relative to the middle part of the upper end of the plug 19 and the middle part of the lower end of the lower guide rod 14, so that the second spring 20 is limited and prevented from being separated.

Sixth, on the basis of the first embodiment, rust-proof coatings for preventing rust are sprayed on the exterior of the valve body 1 and the exterior of the valve cover 8.

Seventh embodiment, on the basis of the first embodiment, a pressure relief hole 25 for pressure relief is formed in one side of the upper end of the valve cover 8.

The working principle is as follows: when the novel pressure reducing valve is used, the novel pressure reducing valve is installed in a pipeline, the first spring 12 downwards extrudes the upper guide rod 13 by rotating the knob 10, the lower guide rod 14 is further pushed to move downwards, the cross rod 15 rotates around the supporting rod 16, the mouth sealing pad 17 is further separated from the air outlet 4, the air outlet 4 is opened, liquefied petroleum gas is conducted, meanwhile, the lower guide rod 14 upwards pushes the lower guide rod 14 under the action force of the second spring 20 when being downwards extruded, the lower guide rod 14 and the upper guide rod 13 are ensured to be balanced, namely the mouth sealing pad 17 is kept balanced, the gas conduction output pressure is smooth and constant, in addition, the elastic deformation of the second spring 20 in the novel pressure reducing valve is larger than that of the first spring 12, the arrangement is that when the burner end is closed, the lower air pressure of the diaphragm 9 is larger than that of the upper air pressure, the lower guide rod 14 upwards moves under the elasticity of the second spring 20, and the cross rod 15 drives the mouth sealing pad 17 to, the diaphragm 9 is effectively prevented from being damaged due to large air pressure in the valve body 1.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a liquefied petroleum gas relief pressure valve, includes valve body (1), its characterized in that: one end of the valve body (1) is connected with an air inlet pipeline (2), one end of the air inlet pipeline (2) is connected with a leakage-proof gasket (3), one end of the air inlet pipeline (2), which is far away from the leakage-proof gasket (3), is provided with an air outlet (4) relative to the interior of the valve body (1), the outer end of the air inlet pipeline (2) is sleeved with a threaded connector (5), one end of the threaded connector (5) is fixedly connected with a hand wheel (6), the other end of the valve body (1) is connected with an air outlet pipeline (7), the upper end of the valve body (1) is provided with a valve cover (8), a diaphragm (9) is connected between the valve cover (8) and the valve body (1), the middle part of the top end of the valve cover (8) is connected with a knob (10), the middle part of the lower end of the knob (10) is provided, diaphragm (9) lower extreme middle part is connected with lower guide arm (14), lower guide arm (14) lower part swing joint has horizontal pole (15), horizontal pole (15) are rotated with valve body (1) lower extreme through branch (16) and are connected, horizontal pole (15) one end is connected with seal mouth pad (17), seal mouth pad (17) are located gas outlet (4) upper end, valve body (1) lower extreme middle part is connected with fixed cover (18), fixed cover (18) internal thread is connected with end cap (19), be connected with second spring (20) between end cap (19) upper end and lower guide arm (14) lower extreme.

2. The pressure reducing valve for lpg as set forth in claim 1, wherein: and a pressure gauge (21) for detecting pressure is arranged on one side of the upper end of the air inlet pipeline (2).

3. The pressure reducing valve for lpg as set forth in claim 1, wherein: the valve cover (8) is fixedly connected with the valve body (1) through a screw (22), and a sink groove is formed in the upper end of the valve cover (8) relative to the connecting end of the screw (22).

4. The pressure reducing valve for lpg as set forth in claim 1, wherein: the anti-skidding lines are arranged at the outer end of the plug (19), and the straight groove (23) is arranged in the middle of the lower end of the plug (19).

5. The pressure reducing valve for lpg as set forth in claim 1, wherein: and two ends of the second spring (20) are connected with positioning blocks (24) relative to the middle part of the upper end of the plug (19) and the middle part of the lower end of the lower guide rod (14).

6. The pressure reducing valve for lpg as set forth in claim 1, wherein: the valve body (1) and the valve cover (8) are coated with anti-rust coatings for preventing rusting.

7. The pressure reducing valve for lpg as set forth in claim 1, wherein: and one side of the upper end of the valve cover (8) is provided with a pressure relief hole (25) for pressure relief.