CN210623719U

CN210623719U - Pressure reducing valve overcurrent protection resetting device

Info

Publication number: CN210623719U
Application number: CN201921734390.XU
Authority: CN
Inventors: 金根喜
Original assignee: Taizhou Meiyadi Gas Valve Co Ltd
Current assignee: Taizhou Meiyadi Gas Valve Co Ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-05-26
Anticipated expiration: 2029-10-16

Abstract

The utility model provides a relief pressure valve overcurrent protection resetting means belongs to the valve and makes technical field. It has solved current relief pressure valve and has appeared difficult scheduling problem that resets after overflowing the problem. This relief pressure valve overcurrent protection resetting means includes the intake pipe that the relief pressure valve has, intake-tube connection has the takeover of admitting air, the takeover of admitting air inwards is equipped with the ejecting piece that is arranged in the inlet port by the outer end in proper order, end cap and spring one, it has the step that air clearance and inlet port inner wall supplied the end cap shutoff to have between end cap and the inlet port, the ejector pin is worn to be equipped with by the intake pipe axial, the outer wall that the outer end of ejector pin stretches out intake pipe and ejector pin inlays and is equipped with the sealing washer, the inner of ejector pin extends spring one and when pressing the ejector pin, the inner of ejector pin is used for the top to touch. The utility model has the advantages of simple structure, overcurrent protection function and being convenient for reset.

Description

Pressure reducing valve overcurrent protection resetting device

Technical Field

The utility model belongs to the technical field of the valve is made, a relief pressure valve is related to, in particular to relief pressure valve overcurrent protection resetting means.

Background

The pressure reducing valve is installed on the angle valve of the liquefied gas steel cylinder and used for connecting the angle valve with the rubber tube, has the functions of reducing output pressure and stabilizing output pressure, and is important gas equipment matched with a household gas appliance. The existing pressure reducing valve generally comprises a valve body, a valve cover fixedly connected with the valve body and a valve film arranged between the valve body and the valve cover, wherein a valve plate is fixed on the valve film, and a compression spring is arranged between the valve plate and the top of the valve cover.

In order to achieve safety, various improvements have been made to the pressure reducing valve, and some of them have also been patented, for example, chinese patent documents disclose a multifunctional gas pressure reducing valve [ application number: 201320591235.3, respectively; authorization notice number: CN203477508U ], which comprises an upper shell and a lower shell, wherein a pressure regulating rubber diaphragm is arranged between the upper shell and the lower shell, a pressure regulating spring with set pressure is sleeved between the pressure regulating rubber diaphragm and the upper shell, a pressure regulating drag hook is arranged at the center of the pressure regulating rubber diaphragm, the lower shell is provided with a high-pressure air inlet channel, a forward closing pressure regulating nozzle, a gas pressure chamber and a low-pressure air outlet channel which are communicated with each other, a forward closing elastic valve core is arranged at the proper position of the high-pressure air inlet channel and is aligned and matched with the forward closing pressure regulating nozzle, a ball valve core which can freely roll or is pulled by the spring is arranged at the proper position in front of the forward closing elastic valve core and is aligned and matched with a flow control valve port, an upward pulling type starting pull button is arranged at the center top of the upper shell, an automatic pull rod is inserted into the upper shell and is connected with the upper part of the pressure regulating drag hook, a convex tooth is arranged on the starting pull rod, and a sealing rubber ring is also arranged on the outer periphery of the high-pressure air inlet channel.

The multifunctional gas pressure reducing valve can improve the use safety, but the structure is formed by improving the common gas pressure reducing valve, the structure is complex, and when the phenomena of overflowing and overpressure occur at the gas inlet end, the spherical valve core is impacted and embedded into the valve port for controlling the flow, so that the pressure reducing valve cannot be used, and the maintenance is inconvenient.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a simple structure, have the relief pressure valve overcurrent protection resetting means that overcurrent protection function and be convenient for reset.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a relief pressure valve overcurrent protection resetting means, intake pipe including the relief pressure valve has, intake-tube connection have the intake pipe of admitting air, the intake pipe have the inlet port that the axial link up, a serial communication port, the intake pipe inwards be equipped with the ejection piece, end cap and the spring that are arranged in the inlet port by the outer end in proper order and take over, ejection piece and intake pipe link firmly mutually and ejection piece has the air vent that the axial link up, end cap and inlet port between have air gap and inlet port inner wall have the step that supplies the end cap shutoff, spring one be used for supporting the end cap and provide elasticity and make the end cap have the trend that moves to ejection piece side all the time, intake pipe radially link up and wear to be equipped with the ejector pin in the intercommunicating pore and the intake pipe axial that communicate in the relief pressure valve, the outer end of ejector pin stretch out the outer wall of intake pipe and ejector pin and inlay and be equipped with the sealing washer, the inner of ejector pin extend to spring department The ejector rod is provided with a through hole, the air inlet pipe is provided with an ejector rod, the ejector rod is provided with a sealing ring, the sealing ring moves between the end part of the through hole and the end part of the air inlet pipe, through which the ejector rod penetrates, and is always sealed on the inner wall of the air inlet pipe, and the air inlet pipe is internally provided with an.

The working principle of the pressure reducing valve overcurrent protection resetting device is as follows: when the gas-fired boiler normally works, gas passes through the ejection piece and overcomes the elastic force of the first spring, so that the plug moves towards one side of the first spring, but the plug cannot block the step, and the gas enters the gas inlet pipe through the gas inlet connecting pipe and then enters the pressure reducing valve through the communicating hole; when the air inlet flow is increased or the pressure exceeds the limit, the gas entering from the ejection piece impacts the plug to enable the plug to be plugged in the step, the automatic cut-off of a gas channel is achieved, the overcurrent and overpressure protection effect is achieved, the use safety is guaranteed, then the ejector rod is pressed, the inner end of the ejector rod pushes the plug to enable the plug to be separated from the step, air inlet is recovered again, in the displacement process of the ejector rod, the sealing performance is guaranteed through the sealing ring, the ejector rod is loosened, the elastic mechanism enables the ejector rod to reset, and the operation is simple and fast.

In the overcurrent protection resetting device for the pressure reducing valve, the ejector rod is provided with a convex ring protruding in the radial direction, the outer end of the convex ring is used for abutting against a blocking shoulder arranged at the end part of the air inlet pipe, the elastic mechanism comprises a second spring sleeved on the ejector rod, one end of the second spring abuts against the inner end of the convex ring, and the other end of the second spring abuts against the inner end of the air inlet connecting pipe. The second spring provides elastic force to enable the ejector rod to reset until the outer end of the convex ring abuts against the blocking shoulder.

In the pressure reducing valve overcurrent protection resetting device, the air inlet hole comprises a first connecting hole, a second connecting hole and a third connecting hole, the first connecting hole, the second connecting hole and the third connecting hole are sequentially arranged from the outer end of the air inlet connecting pipe to the inner axial direction, the aperture of the first connecting hole is gradually reduced, the ejection piece is fixedly connected into the first connecting hole, a plug is arranged in the second connecting hole, an air passing gap is formed between the plug and the inner wall of the second connecting hole, a first spring is arranged in a step for plugging the plug formed in the orifice of the third connecting hole, a retaining ring protruding inwards in the radial direction is arranged on the inner wall of the air inlet hole, one end of the first spring abuts against the plug. The orifice of the second connecting hole is abutted by the jacking piece, the jacking piece is convenient to install and position, the orifice of the third connecting hole is plugged by the plug, the structure is simple, the manufacturing is convenient, the first spring is positioned in the third connecting hole and matched with the retainer ring, and the first spring is convenient to install and position.

In the pressure reducing valve overcurrent protection resetting device, the plug comprises a cylindrical body, the outer diameter of the body is smaller than the inner diameter of the second connecting hole, the inner end of the body is provided with a conical surface for the first spring to be sleeved in, the outer end of the body is provided with a plurality of supporting ribs which are uniformly distributed in the circumferential direction, and the outer walls of the supporting ribs abut against the hole wall of the second connecting hole. The conical surface makes the shutoff effectual, supports the rib and plays the guide effect and makes end cap axial displacement steady, supplies the gas to pass through between each supports the rib.

As another situation, in the pressure reducing valve overcurrent protection resetting device, the plug is a spherical ball, the diameter of the spherical ball is smaller than the inner diameter of the connecting hole two, and the diameter of the spherical ball is larger than the inner diameter of the connecting hole three.

In the pressure reducing valve overcurrent protection resetting device, the number of the sealing rings is at least two. Thus, multiple sealing effects are achieved, and gas leakage is avoided.

In the pressure reducing valve overcurrent protection resetting device, the air inlet pipe is positioned at the bottom of the pressure reducing valve, and the bottom of the air inlet pipe is connected with a pressure gauge for measuring the air pressure in the air inlet pipe. The intake pipe is located the relief pressure valve bottom and is made the axial dimensions of relief pressure valve shorter, small in size, and the installation of being convenient for is arranged, and the manometer shows intake pipe internal gas pressure, convenient observation.

In foretell relief pressure valve overcurrent protection resetting means, the outer wall of takeover outer end that admits air have and be the face of supporting of conical surface, support to inlay on the face and be equipped with O type circle, the takeover cover of admitting air be equipped with and connect the swivel nut, the connection swivel nut link firmly the hand wheel. The hand wheel drives the connection threaded sleeve to rotate, so that the connection threaded sleeve is in threaded connection with the angle valve of the steel cylinder, the abutting surface and the O-shaped ring play a role in abutting against sealing, and gas leakage is avoided.

Compared with the prior art, this relief pressure valve overcurrent protection resetting means need not to make complicated structural change to current relief pressure valve, and overall structure is simple, small in size, and the installation of being convenient for is arranged, and possesses the superpressure protection function that overflows, and when gas flow resumes and need admit air once more, only need press the ejector pin and back open the end cap of shutoff and can make relief pressure valve normal use, and the operation is swift.

Drawings

Fig. 1 is a perspective structural view of the pressure reducing valve overcurrent protection resetting device.

Fig. 2 is a structural section view of the pressure reducing valve overcurrent protection resetting device.

Fig. 3 is a three-dimensional structure diagram of a plug in the pressure reducing valve overcurrent protection resetting device.

In the figure, 1, an air inlet pipe; 11. a communicating hole; 12. a shoulder block; 2. an air inlet connecting pipe; 21. an air inlet; 22. a step; 23. a first connecting hole; 24. a second connecting hole; 25. connecting a hole III; 26. a retainer ring; 3. ejecting the piece; 31. a vent hole; 4. a plug; 41. a body; 42. a conical surface; 43. a support rib; 5. a first spring; 6. a top rod; 61. a convex ring; 7. a seal ring; 8. a second spring; 9. a pressure gauge; 10. an O-shaped ring; 13. connecting a threaded sleeve; 14. a handwheel.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the overcurrent protection resetting device of the pressure reducing valve comprises an air inlet pipe 1 which is arranged on the pressure reducing valve, wherein the air inlet pipe 1 is in threaded connection with an air inlet connecting pipe 2, the outer wall of the outer end of the air inlet connecting pipe 2 is provided with a supporting surface which is a conical surface, an O-shaped ring 10 is embedded on the supporting surface, the air inlet connecting pipe 2 is sleeved with a connecting threaded sleeve 13, and the connecting threaded sleeve 13 is fixedly connected with a hand wheel 14. The air inlet connecting pipe 2 is provided with an air inlet hole 21 which is axially communicated, the air inlet connecting pipe 2 is internally provided with a jacking part 3, a plug 4 and a spring I5 which are positioned in the air inlet hole 21 from the outer end inwards in sequence, the jacking part 3 is fixedly connected with the air inlet connecting pipe 2, the jacking part 3 is provided with an air vent 31 which is axially communicated, an air gap is arranged between the plug 4 and the air inlet hole 21, the inner wall of the air inlet hole 21 is provided with a step 22 for plugging the plug 4, the spring I5 is used for supporting the plug 4 and providing elasticity to enable the plug 4 to have the trend of always moving towards the jacking part 3 side, the air inlet pipe 1 is radially communicated with a communication hole 11 communicated with a pressure reducing valve, the air inlet pipe 1 is axially provided with a push rod 6 in a penetrating way, the outer end of the push rod 6 extends out of the air inlet pipe 1, the outer wall of the push rod 6 is embedded with a sealing, the sealing ring 7 is displaced between the end parts of the communicating hole 11 and the air inlet pipe 1 for the ejector rod 6 to penetrate out and is always sealed on the inner wall of the air inlet pipe 1, and an elastic mechanism for providing elastic force to enable the ejector rod 6 to reset is arranged in the air inlet pipe 1.

In more detail, the ejector rod 6 is provided with a convex ring 61 protruding in the radial direction, the outer end of the convex ring 61 is used for abutting against a stop shoulder 12 arranged at the end part of the air inlet pipe 1, the elastic mechanism comprises a spring II 8 sleeved on the ejector rod 6, one end of the spring II 8 abuts against the inner end of the convex ring 61, and the other end of the spring II 8 abuts against the inner end of the air inlet connecting pipe 2; the air inlet 21 comprises a first connecting hole 23, a second connecting hole 24 and a third connecting hole 25, wherein the first connecting hole 23, the second connecting hole 24 and the third connecting hole 25 are sequentially arranged from the outer end of the air inlet connecting pipe 2 to the inner axial direction, the aperture of the first connecting hole 23 is gradually reduced, a jacking piece 3 is fixedly connected into the first connecting hole 23, a plug 4 is arranged in the second connecting hole 24, an air passing gap is formed between the inner wall of the plug 4 and the inner wall of the second connecting hole 24, a first spring 5 is arranged in a step 22 for plugging the plug 4 formed in the aperture of the third connecting hole 25, a first retaining ring 26 protruding inwards in the radial direction is arranged on the inner wall.

The working principle of the pressure reducing valve overcurrent protection resetting device is as follows: when the gas pressure reducing valve normally works, gas passes through the ejection piece 3 and overcomes the elastic force of the first spring 5, so that the plug 4 moves towards the first spring 5 side, but the plug 4 cannot block the step 22, and the gas enters the gas inlet pipe 1 through the gas inlet connecting pipe 2 and then enters the pressure reducing valve through the communicating hole 11; when the inflow increases or the pressure exceeds the limit, the gas that gets into from the ejecting piece 3 strikes end cap 4 and makes end cap 4 shutoff in step 22, realize the automatic shutoff gas passageway, play the superpressure guard action of overflowing, the safety in utilization has been guaranteed, the gas flow replies the back, press ejector pin 6 again, the inner top of ejector pin 6 touches end cap 4 and makes end cap 4 break away from step 22, resume to admit air again like this, 6 displacement in-process of ejector pin, sealing washer 7 has guaranteed the leakproofness, loosen ejector pin 6, spring two 8 provide elasticity and make ejector pin 6 reset, conflict in keeping off shoulder 12 until the outer end of protruding circle 61, easy operation is swift.

As shown in fig. 3, in order to make the axial movement of the plug 4 stable and the plugging effect good, in this embodiment, the plug 4 includes a cylindrical body 41, and the outer diameter of the body 41 is smaller than the inner diameter of the connection hole two 24, the inner end of the body 41 has a tapered surface 42 for the spring one 5 to be sleeved in, the outer end of the body 41 has three support ribs 43 uniformly distributed in the circumferential direction, and the outer wall of the support rib 43 is abutted against the hole wall of the connection hole two 24; for good sealing performance, the number of the sealing rings 7 is two in the embodiment; in order to achieve compact structure and obtain the air pressure of the air inlet pipe 1 conveniently, the air inlet pipe 1 is located at the bottom of the pressure reducing valve, and the bottom of the air inlet pipe 1 is connected with a pressure gauge 9 for measuring the air pressure in the air inlet pipe 1.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An overcurrent protection resetting device of a pressure reducing valve comprises an air inlet pipe (1) which is arranged on the pressure reducing valve, the air inlet pipe (1) is connected with an air inlet connecting pipe (2), the air inlet connecting pipe (2) is provided with an air inlet hole (21) which is axially communicated, the overcurrent protection resetting device is characterized in that the air inlet connecting pipe (2) is internally provided with a jacking piece (3), a plug (4) and a first spring (5) which are positioned in the air inlet hole (21) from the outer end in sequence, the jacking piece (3) is fixedly connected with the air inlet connecting pipe (2), the jacking piece (3) is provided with an axially communicated air vent (31), an air gap is formed between the plug (4) and the air inlet hole (21), the inner wall of the air inlet hole (21) is provided with a step (22) for plugging the plug (4), and the first spring (5) is used for supporting the plug (4) and providing elasticity so that the plug (4) has the trend of, intake pipe (1) radial through have communicate in intercommunicating pore (11) and intake pipe (1) axial of relief pressure valve and wear to be equipped with ejector pin (6), the outer end of ejector pin (6) stretch out the outer wall of intake pipe (1) and ejector pin (6) and inlay and be equipped with sealing washer (7), the inner of ejector pin (6) extend to spring (5) department and when pressing ejector pin (6) the inner of ejector pin (6) be used for the top to touch end cap (4), ejector pin (6) displacement in-process sealing washer (7) in intercommunicating pore (11) and intake pipe (1) supply between the tip that ejector pin (6) were worn out the displacement and seal up in intake pipe (1) inner wall all the time, intake pipe (1) in be equipped with the elastic mechanism that provides elasticity and make ejector pin (6) reset.

2. The pressure reducing valve overcurrent protection resetting device as claimed in claim 1, wherein the ejector rod (6) is provided with a radially protruding convex ring (61), the outer end of the convex ring (61) is used for abutting against a blocking shoulder (12) arranged at the end part of the air inlet pipe (1), the elastic mechanism comprises a second spring (8) sleeved on the ejector rod (6), one end of the second spring (8) abuts against the inner end of the convex ring (61), and the other end of the second spring (8) abuts against the inner end of the air inlet connecting pipe (2).

3. The pressure reducing valve overcurrent protection resetting device of claim 2, wherein the air inlet (21) comprises a first connecting hole (23), a second connecting hole (24) and a third connecting hole (25) which are axially and sequentially arranged from the outer end of the air inlet connecting pipe (2) to the inner side and have gradually reduced diameters, the ejection piece (3) is fixedly connected in the first connecting hole (23), the plug (4) is arranged in the second connecting hole (24), the air passing gap is arranged between the plug (4) and the inner wall of the second connecting hole (24), the orifice of the connecting hole III (25) forms a step (22) for plugging the plug (4), a spring I (5) is arranged in the connecting hole III (25), the inner wall of the air inlet hole (21) is provided with a retaining ring (26) which is inwards convex in the radial direction, one end of the first spring (5) is abutted against the plug (4), and the other end of the first spring (5) is abutted against the retaining ring (26).

4. The pressure reducing valve overcurrent protection resetting device as claimed in claim 3, wherein the plug (4) comprises a cylindrical body (41), the outer diameter of the body (41) is smaller than the inner diameter of the connecting hole II (24), a tapered surface (42) for the spring I (5) to be sleeved into is arranged at the inner end of the body (41), a plurality of supporting ribs (43) are uniformly distributed in the circumferential direction at the outer end of the body (41), and the outer walls of the supporting ribs (43) are abutted against the hole wall of the connecting hole II (24).

5. The pressure reducing valve overcurrent protection resetting device as claimed in claim 3, wherein the plug (4) is a spherical ball, the diameter of the spherical ball is smaller than the inner diameter of the second connecting hole (24), and the diameter of the spherical ball is larger than the inner diameter of the third connecting hole (25).

6. The pressure reducing valve over-current protection resetting device according to any one of claims 1 to 5, characterized in that the number of the sealing rings (7) is at least two.

7. The pressure reducing valve overcurrent protection resetting device of any one of claims 1 to 5, wherein the air inlet pipe (1) is positioned at the bottom of the pressure reducing valve, and a pressure gauge (9) for measuring the air pressure in the air inlet pipe (1) is connected to the bottom of the air inlet pipe (1).

8. The pressure reducing valve overcurrent protection resetting device according to any one of claims 1 to 5, wherein the outer wall of the outer end of the air inlet connecting pipe (2) is provided with a supporting surface which is a conical surface, an O-shaped ring (10) is embedded on the supporting surface, the air inlet connecting pipe (2) is sleeved with a connecting threaded sleeve (13), and the connecting threaded sleeve (13) is fixedly connected with a hand wheel (14).