Pressure reducing valve

Abstract

The utility model discloses a pressure reducing valve, which relates to the technical field of valves and comprises a valve body, a valve core component and a pressure regulating component, the valve body is provided with a high-pressure cavity, a low-pressure cavity and a valve hole communicated with the high-pressure cavity and the low-pressure cavity, and the valve core component penetrates through the valve hole and can axially move along the valve hole to open or close the valve hole; the pressure adjusting assembly comprises a valve, a pressing piece, a pressure adjusting spring and an adjusting piece, the valve element assembly is connected to the valve, the pressing piece is connected to the side, away from the valve element assembly, of the valve, the pressure adjusting spring abuts against the pressing piece, and the adjusting piece abuts against the pressure adjusting spring; a first step surface and a second step surface are arranged on the side, facing the valve, of the pressing piece, the first step surface is attached to the valve, and a gap is formed between the second step surface and the valve; a first mounting groove is formed in the second step surface, a first buffer ring is embedded in the first mounting groove, and the first buffer ring protrudes out of the first mounting groove and abuts against the valve. Vibration and noise generated when the pressure reducing valve works can be reduced, and the service life of the pressure reducing valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of valve, especially a pressure reducing valve. BACKGROUND

[0002] The pressure reducing valve is a pressure regulating device in a gas system, which comprises a valve body and a valve core, a valve cavity is arranged in the valve body, and an air inlet and an air outlet are respectively connected to the two sides of the valve cavity. A valve seat is arranged between the air inlet and the air outlet in the valve cavity, and the valve core passes through the valve seat to block the valve seat. A valve flap is arranged above the valve seat, one end of the valve flap away from the valve seat is connected to a spring, and the other end of the valve flap away from the spring is connected to the valve core.

[0003] When the pressure reducing valve works, the user directly moves the spring through the screw rod and other components to extrude the spring, so that the valve flap drives the valve core to move downward to open the valve hole on the valve seat, so that the air inlet and the air outlet are connected, and the high-pressure gas flows into the valve cavity through the air inlet and is discharged from the air outlet. When the air pressure on the air outlet side rises, the gas acts on the valve flap to drive the valve core to rise to reduce the opening degree of the valve hole, thereby reducing the air pressure on the air outlet side, so that the pressure regulation is realized through the pressure reducing valve.

[0004] In the above-mentioned pressure reducing valve, the valve flap and the spring will move up and down in the valve cavity when the pressure reducing valve works to adjust the air pressure, which will generate noise and vibration during operation, affecting the working environment of the pressure reducing valve and reducing the service life of the pressure reducing valve. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a pressure reducing valve which can reduce the vibration and noise during the working of the pressure reducing valve and prolong the service life of the pressure reducing valve.

[0006] The above technical purpose of the utility model is realized by the following technical scheme:

[0007] The utility model provides a pressure reducing valve, which comprises:

[0008] A valve body is provided with a high-pressure cavity, a low-pressure cavity and a valve hole connecting the high-pressure cavity and the low-pressure cavity;

[0009] A valve core assembly passes through the valve hole and can move axially along the valve hole to open or close the valve hole;

[0010] A pressure regulating assembly comprises a valve flap, a pressing-down piece, a pressure regulating spring and an adjusting piece. The valve flap is arranged on the side of the valve hole away from the high-pressure cavity, the valve core assembly is connected to the valve flap, the pressing-down piece is connected to the side of the valve flap away from the valve core assembly, the pressure regulating spring abuts against the pressing-down piece, and the adjusting piece abuts against the pressure regulating spring to adjust the compression amount of the pressure regulating spring.

[0011] The lower pressing piece is provided with a first step surface and a second step surface on a side facing the valve, the first step surface is connected to the valve in a fit manner, and a gap is formed between the second step surface and the valve; the second step surface is provided with a first installation groove, and a first buffer ring is embedded in the first installation groove, and the first buffer ring protrudes from the first installation groove and abuts against the valve.

[0012] Further, the first step surface and the second step surface are provided in a stepped manner, the second step surface surrounds the first step surface, the first installation groove is an annular groove, and the first installation groove is coaxially arranged with the valve hole.

[0013] Further, the pressure regulating assembly further comprises a spring sleeve, the spring sleeve is sleeved on the adjusting spring, the spring sleeve is fixedly connected to the valve body, and an end of the spring sleeve facing the valve is open, and the lower pressing piece is coaxially arranged in the spring sleeve.

[0014] Further, a second installation groove in a ring shape is arranged on the circumferential side of the lower pressing piece, a second buffer ring is embedded in the second installation groove, and an outer ring of the second buffer ring abuts against an inner wall of the spring sleeve.

[0015] Further, a limiting step is arranged on an inner wall of an end of the spring sleeve facing the valve, and the lower pressing piece is limited on a side of the limiting step facing the valve.

[0016] Further, the adjusting piece comprises an adjusting bolt and an upper pressing piece, a threaded hole is arranged on an end of the spring sleeve away from the valve, the adjusting bolt is threadedly arranged in the threaded hole, the upper pressing piece is arranged in the spring sleeve and abuts against the adjusting bolt, and the upper pressing piece abuts against an end of the adjusting spring away from the lower pressing piece.

[0017] Further, a first damping ring pad is sleeved on an end of the adjusting bolt extending into the spring sleeve, and the first damping ring pad is arranged between the upper pressing piece and a bottom wall of the spring sleeve.

[0018] Further, a rotating sleeve is fixedly connected to an end of the adjusting bolt away from the spring sleeve, the rotating sleeve is sleeved on an end of the spring sleeve away from the valve, a second damping ring pad is fixedly connected to an end of the spring sleeve facing a bottom wall of the rotating sleeve, and the second damping ring pad is sleeved on the adjusting bolt.

[0019] Further, the valve core assembly comprises a valve core rod and a valve core part, the valve core rod passes through the valve hole, the valve core part is arranged on the side of the valve hole away from the valve, the valve core part is fixed to the valve core rod, and the valve core part is in a conical shape with a diameter gradually reduced in the direction close to the valve hole.

[0020] Further, the valve body is fixedly provided with a third damping ring pad on the side of the valve hole close to the valve core part, and the valve core part is inserted into and abuts against the inner ring of the third damping ring pad.

[0021] The side of the valve core part away from the valve hole abuts against a compression spring, one end of the compression spring away from the valve core part abuts against a fourth damping ring pad, and the fourth damping ring pad is fixed to the valve body and is sleeved on the valve core rod.

[0022] In summary, the utility model has the following beneficial effects:

[0023] 1. The pressure reducing valve has the following beneficial effects: the initial pressure reducing valve is compressed by the adjusting part to compress the pressure spring, so that the lower pressing part acts on the valve to drive the valve to move towards the valve hole, thereby driving the valve core assembly to move along the valve hole to open the valve hole; at this time, the high-pressure cavity and the low-pressure cavity are communicated, the high-pressure gas in the valve body can flow into the low-pressure cavity through the valve hole, and the high-pressure gas acts on the valve to drive the valve to move away from the valve hole, thereby reducing the gas flow area of the valve hole and realizing the pressure regulating function.

[0024] 2. The lower pressing part is embedded with the second buffer ring in the second installation groove, and the second buffer ring is arranged to further reduce the vibration and noise generated when the lower pressing part and the spring sleeve move relative to each other.

[0025] 3. The lower pressing part is limited by the limiting step, and the limiting step abuts against the lower pressing part after the lower pressing part and the valve move a certain distance away from the valve hole, thereby avoiding the connection failure of the connection part of the lower pressing part and the valve and the connection part of the valve and the valve core assembly due to excessive stress when the pressure in the low-pressure cavity is too large. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a sectional structure schematic view of the pressure reducing valve of one embodiment of the utility model.

[0027] Figure 2 is a cross-sectional structure schematic view of the valve core assembly of an embodiment of the utility model.

[0028] Figure 3 is a cross-sectional structure schematic view of the pressure regulating assembly of an embodiment of the utility model.

[0029] In the figure: 1000, pressure reducing valve; 100, valve body; 110, high pressure cavity; 120, low pressure cavity; 130, valve seat; 140, valve hole; 150, third damping ring pad; 160, fourth damping ring pad; 170, compression spring; 200, valve core assembly; 210, valve core rod; 220, valve core part; 300, pressure regulating assembly; 310, valve; 320, lower pressing piece; 321, first step surface; 322, second step surface; 323, first installation groove; 324, first buffer ring; 325, second installation groove; 326, second buffer ring; 330, pressure regulating spring; 340, adjusting piece; 341, adjusting bolt; 342, upper pressing piece; 343, rotating sleeve; 350, spring sleeve; 351, limiting step; 352, threaded hole; 353, first damping ring pad; 354, second damping ring pad. DETAILED DESCRIPTION

[0030] The utility model will be further described below in combination with the drawings.

[0031] The embodiment of the utility model is a pressure reducing valve 1000, refer to Figure 1 , the pressure reducing valve 1000 includes valve body 100, valve core assembly 200 and pressure regulating assembly 300. Valve core assembly 200 is arranged in valve body 100;Pressure regulating assembly 300 is connected to valve body 100, for adjusting the pressure output by valve body 100.

[0032] Valve body 100 is provided with high pressure cavity 110 and low pressure cavity 120, high pressure cavity 110 is used to input high pressure gas by connecting gas source, and low pressure cavity 120 is used to output reduced pressure gas by connecting outside. Valve body 100 is fixedly provided with a valve seat 130 between high pressure cavity 110 and low pressure cavity 120, the valve seat 130 is provided with a valve hole 140, and high pressure cavity 110 and low pressure cavity 120 can be communicated through valve hole 140.

[0033] Refer to Figure 1 and Figure 2The valve core assembly 200 includes a valve core rod 210 and a valve core part 220. One end of the valve core rod 210 penetrates the valve hole 140 and is connected with the pressure regulating assembly 300. The valve core part 220 is arranged at the side of the valve hole 140 away from the pressure regulating assembly 300 and is located in the high-pressure cavity 110. The valve core part 220 is fixed to the valve core rod 210 and protrudes outward in the radial direction of the valve core rod 210. The diameter of the valve core rod 210 is smaller than that of the valve hole 140, and the diameter of the valve core part 220 is larger than that of the valve hole 140. Therefore, the valve core rod 210 can drive the valve core part 220 to move towards the low-pressure cavity 120 to close the valve hole 140 and shut off the flow path between the high-pressure cavity 110 and the low-pressure cavity 120.

[0034] The valve core part 220 is in the shape of a cone with a diameter gradually decreasing in the direction close to the valve hole 140. During the process of inserting the valve core part 220 into the valve hole 140, the opening of the valve hole 140 gradually decreases, and the gas flow from the high-pressure cavity 110 to the low-pressure cavity 120 gradually decreases. Meanwhile, the conical shape facilitates the insertion of the valve core part 220 into the valve hole 140 and the cooperation between the valve core part 220 and the valve hole 140.

[0035] With reference to Figure 1 and Figure 3 The pressure regulating assembly 300 includes a valve 310, a lower pressing member 320, a pressure regulating spring 330 and an adjusting member 340. The valve 310 is located in the low-pressure cavity 120 and is arranged at the side of the valve hole 140 away from the high-pressure cavity 110. One end of the valve core rod 210 of the valve core assembly 200 penetrates the valve hole 140 and is connected with the valve 310. The lower pressing member 320 is connected with the valve 310 at the side away from the valve core assembly 200. The pressure regulating spring 330 abuts against the lower pressing member 320. The adjusting member 340 abuts against the pressure regulating spring 330 to adjust the compression amount of the pressure regulating spring 330.

[0036] The adjusting member 340 is used to compress the pressure regulating spring 330, so that the lower pressing member 320 acts on the valve 310 to drive the valve 310 to move towards the valve hole 140, thereby driving the valve core rod 210 to move downward along the valve hole 140 to open the valve hole 140. At this time, the high-pressure cavity 110 and the low-pressure cavity 120 are communicated, and the high-pressure gas in the valve body 100 can flow into the low-pressure cavity 120 through the valve hole 140. Meanwhile, the high-pressure gas acts on the valve 310 to gradually drive the valve core assembly 200 to move away from the valve hole 140, thereby reducing the gas flow area of the valve hole 140 and realizing the pressure regulating function.

[0037] In this embodiment, the valve 310 is a flexible sealing film, so that when the gas pressure in the low-pressure cavity 120 acts on the valve 310, the valve 310 can move away from the valve hole 140, and the gas in the valve body 100 will not leak out.

[0038] The lower pressing piece 320 is provided with a first step surface 321 and a second step surface 322 towards one side of the valve 310. The first step surface 321 is attached to the valve 310, and the first step surface 321 is fixed to the valve 310, so that the lower pressing piece 320 can drive the valve 310 to move. The second step surface 322 forms a gap with the valve 310.

[0039] The second step surface 322 is provided with a first installation groove 323, and the first installation groove 323 is embedded with a first buffer ring 324. The first buffer ring 324 protrudes from the first installation groove 323 and abuts against the valve 310. The first buffer ring 324 is supported between the valve 310 and the second step surface 322, thereby reducing the impact and wear between the valve 310 and the lower pressing piece 320, reducing the vibration when the valve 310, the lower pressing piece 320 and the pressure regulating spring 330 move back and forth, reducing the noise when the pressure reducing valve 1000 works, and prolonging the service life of the pressure reducing valve 1000.

[0040] In the embodiment, the first step surface 321 and the second step surface 322 are arranged in a stepped manner. The first step surface 321 is located on the side of the second step surface 322 close to the valve 310, and the second step surface 322 surrounds the outside of the first step surface 321. Thus, the middle part of the lower pressing piece 320 is stably connected to the valve 310 through the first step surface 321, and the gap between the second step surface 322 of the lower pressing piece 320 and the valve 310 is uniformly surrounded outside the first step surface 321, so as to reduce the vibration and wear between the lower pressing piece 320 and the valve 310 when they move.

[0041] In the embodiment, the first installation groove 323 is an annular groove, and the first installation groove 323 is coaxially arranged with the valve hole 140. Correspondingly, the first buffer ring 324 is an annular ring.

[0042] The first buffer ring 324 is an annular member made of flexible material, specifically made of rubber, so as to be flexibly supported between the second step surface 322 and the valve 310 through the first buffer ring 324, thereby reducing the vibration and noise between the lower pressing piece 320 and the valve 310.

[0043] Referring to Figure 1 and Figure 3 , the pressure regulating spring 330 is provided with a spring sleeve 350, the spring sleeve 350 is fixedly connected to the valve body 100, the spring sleeve 350 is coaxially arranged with the valve hole 140, and the end of the spring sleeve 350 towards the valve 310 is open, and the lower pressing piece 320 is coaxially arranged in the spring sleeve 350. Thus, the spring is limited and protected by the spring sleeve 350, and the lower pressing piece 320 is limited by the spring sleeve 350, so that the lower pressing piece 320 can only move axially along the spring sleeve 350, thereby stably driving the valve 310 and the valve core assembly 200 to move axially along the valve hole 140.

[0044] The lower pressing piece 320 is provided with a second installation groove 325 in the circumferential direction, the second installation groove 325 extends along the circumferential direction of the lower pressing piece 320, and a second buffer ring 326 is embedded in the second installation groove 325. The second buffer ring 326 is sleeved on the outside of the lower pressing piece 320, the inner ring of the second buffer ring 326 abuts against the inner wall of the second installation groove 325, and the outer ring of the second buffer ring 326 abuts against the inner wall of the spring sleeve 350. The second buffer ring 326 is arranged to further reduce the vibration and noise generated when the lower pressing piece 320 and the spring sleeve 350 move relative to each other.

[0045] In this embodiment, the second buffer ring 326 is made of a flexible material, specifically rubber, to reduce the vibration and noise caused by the collision between the circumferential side of the lower pressing piece 320 and the spring sleeve 350 when they move relative to each other.

[0046] Referring to Figure 3 , the inner wall of one end of the spring sleeve 350 facing the valve 310 is provided with a limiting step 351, and the lower pressing piece 320 is limited on the side of the limiting step 351 facing the valve 310. By limiting the lower pressing piece 320 with the limiting step 351, when the lower pressing piece 320 and the valve 310 move a certain distance away from the valve hole 140, the limiting step 351 abuts against the lower pressing piece 320, avoiding the connection between the lower pressing piece 320 and the valve 310 and the connection between the valve 310 and the valve core assembly 200 from failing due to excessive stress when the pressure in the low-pressure chamber 120 is too high.

[0047] Referring to Figure 1 and Figure 3 , in this embodiment, the adjusting member 340 includes an adjusting bolt 341 and an upper pressing piece 342. A threaded hole 352 is formed in the end of the spring sleeve 350 away from the valve 310 (i.e., the end of the spring sleeve 350 sealed by the valve 310), and the adjusting bolt 341 is screwed into the threaded hole 352. The upper pressing piece 342 is arranged in the spring sleeve 350 and abuts against the adjusting bolt 341. The side of the upper pressing piece 342 away from the adjusting bolt 341 abuts against the end of the adjusting spring away from the lower pressing piece 320. Therefore, when the adjusting bolt 341 is rotated, the adjusting bolt 341 moves axially along the threaded hole towards the spring sleeve 350, thereby driving the upper pressing piece 342 to compress the adjusting spring towards the lower pressing piece 320, so as to drive the lower pressing piece 320, the valve 310 and the valve core assembly 200 to move downward.

[0048] The end of the adjusting screw 341 extending into the spring sleeve 350 is sleeved with a first damping ring pad 353, which is arranged between the upper pressing piece 342 and the bottom wall of the spring sleeve 350. When the adjusting screw 341 moves away from the spring sleeve 350 to abut the upper pressing piece 342 against the end wall of the spring sleeve 350 away from the valve 310, the first damping ring pad 353 is clamped between the upper pressing piece 342 and the spring sleeve 350 to play a buffering role, further reducing the vibration and noise of the pressure reducing valve 1000.

[0049] In the embodiment, the end of the adjusting screw 341 away from the spring sleeve 350 is fixedly connected with a rotating sleeve 343, which is sleeved outside the end of the spring sleeve 350 away from the valve 310. The rotating sleeve 343 is connected with the adjusting screw 341, so that the user can rotate the adjusting screw 341 by rotating the rotating sleeve 343.

[0050] The end of the spring sleeve 350 towards the bottom wall of the rotating sleeve 343 is fixedly connected with a second damping ring pad 354, which is sleeved outside the adjusting screw 341. Thus, the second damping ring pad 354 can play a buffering role when the adjusting screw 341 moves axially along the threaded hole 352 towards the spring sleeve 350, reducing the knocking and vibration between the spring sleeve 350 and the rotating sleeve 343.

[0051] Referring to Figure 1 and Figure 2 , the valve body 100 is fixedly provided with a third damping ring pad 150 on the side of the valve hole 140 towards the valve core part 220, which is arranged on the side of the valve seat 130 towards the high-pressure chamber 110. The valve core part 220 is inserted into and abuts the inner ring of the third damping ring pad 150, which buffers the vibration between the valve core part 220 and the valve hole 140, and also enhances the sealing performance between the valve core part 220 and the valve hole 140.

[0052] The side of the valve core part 220 away from the valve hole 140 abuts a compression spring 170, and the end of the compression spring 170 away from the valve core part 220 abuts a fourth damping ring pad 160, which is fixed to the valve body 100 and sleeved outside the valve core rod 210. Thus, initially, the valve core part 220 is tightly abutted against the valve seat 130 under the elastic force of the compression spring 170 to close the valve hole 140, so that the pressure reducing valve 1000 is in a normally closed state to avoid gas leakage when the pressure reducing valve 1000 is not working; the fourth damping ring pad 160 buffers the vibration between the valve core rod 210 and the valve body 100 when the valve core rod 210 moves, further reducing the vibration and noise of the pressure reducing valve 1000.

[0053] The above merely describes preferred embodiments of the present application, and thus equivalent changes or modifications made in accordance with the structure, features and principles described in the patent application scope of the present application are included in the patent application scope of the present application.

Claims

1. A pressure reducing valve, characterized in that, The pressure reducing valve (1000) includes: The valve body (100) has a high-pressure chamber (110), a low-pressure chamber (120) and a valve hole (140) connecting the high-pressure chamber (110) and the low-pressure chamber (120); A valve core assembly (200) passes through the valve hole (140) and is axially movable along the valve hole (140) to open or close the valve hole (140); A pressure regulating assembly (300) includes a valve (310), a pressure reducing member (320), a pressure regulating spring (330), and an adjusting member (340). The valve (310) is disposed on the side of the valve orifice (140) away from the high-pressure chamber (110). The valve core assembly (200) is connected to the valve (310). The pressure reducing member (320) is connected to the side of the valve (310) away from the valve core assembly (200). The pressure regulating spring (330) abuts against the pressure reducing member (320). The adjusting member (340) abuts against the pressure regulating spring (330) to adjust the compression of the pressure regulating spring (330). The pressing member (320) has a first stepped surface (321) and a second stepped surface (322) on the side facing the valve (310). The first stepped surface (321) is attached to the valve (310), and a gap is formed between the second stepped surface (322) and the valve (310). The second stepped surface (322) has a first mounting groove (323), and a first buffer ring (324) is embedded in the first mounting groove (323). The first buffer ring (324) protrudes from the first mounting groove (323) and abuts against the valve (310).

2. A pressure reducing valve according to claim 1, characterized in that, The first step surface (321) and the second step surface (322) are arranged in a step shape, the second step surface (322) surrounds the first step surface (321), the first mounting groove (323) is an annular groove, and the first mounting groove (323) is coaxially arranged with the valve hole (140).

3. A pressure reducing valve according to claim 1, characterized in that, The pressure regulating assembly (300) further includes a spring sleeve (350), which is sleeved on the outside of the regulating spring; the spring sleeve (350) is fixedly connected to the valve body (100) and the end of the spring sleeve (350) facing the valve (310) is open, and the pressure member (320) is coaxially inserted and fitted inside the spring sleeve (350).

4. A pressure reducing valve according to claim 3, characterized in that, The lowering member (320) has an annular second mounting groove (325) on its periphery. A second buffer ring (326) is embedded in the second mounting groove (325). The outer ring of the second buffer ring (326) abuts against the inner wall of the spring sleeve (350).

5. A pressure reducing valve according to claim 3, characterized in that, The inner wall of the spring sleeve (350) facing the valve (310) is provided with a limiting step (351), and the pressing member (320) is limited to the side of the limiting step (351) facing the valve (310).

6. A pressure reducing valve according to claim 3, characterized in that, The adjusting member (340) includes an adjusting bolt (341) and an upper pressure member (342). The end of the spring sleeve (350) away from the valve (310) is provided with a threaded hole (352). The adjusting bolt (341) is threaded into the threaded hole (352). The upper pressure member (342) is disposed inside the spring sleeve (350) and abuts against the adjusting bolt (341). The upper pressure member (342) abuts against the end of the adjusting spring away from the lower pressure member (320).

7. A pressure reducing valve according to claim 6, characterized in that, The end of the adjusting bolt (341) that extends into the spring sleeve (350) is fitted with a first damping ring pad (353), which is disposed between the upper pressure member (342) and the bottom wall of the spring sleeve (350).

8. A pressure reducing valve according to claim 6, characterized in that, A rotating sleeve (343) is fixedly connected to the end of the adjusting bolt (341) away from the spring sleeve (350). The rotating sleeve (343) is sleeved on the end of the spring sleeve (350) away from the valve (310). A second damping ring pad (354) is fixedly connected to the end of the spring sleeve (350) facing the bottom wall of the rotating sleeve (343). The second damping ring pad (354) is sleeved on the outside of the adjusting bolt (341).

9. A pressure reducing valve according to claim 1, characterized in that, The valve core assembly (200) includes a valve core rod (210) and a valve core portion (220). The valve core rod (210) passes through the valve hole (140). The valve core portion (220) is disposed on the side of the valve hole (140) away from the valve (310). The valve core portion (220) is fixed to the valve core rod (210). The valve core portion (220) is conical in shape with its diameter gradually decreasing along the direction close to the valve hole (140).

10. A pressure reducing valve according to claim 9, characterized in that, The valve body (100) has a third damping ring pad (150) fixedly provided on the side of the valve hole (140) facing the valve core (220), and the valve core (220) is inserted into and abuts against the inner ring of the third damping ring pad (150). A compression spring (170) abuts against the side of the valve core (220) away from the valve hole (140). The end of the compression spring (170) away from the valve core (220) abuts against a fourth damping ring pad (160). The fourth damping ring pad (160) is fixed to the valve body (100) and sleeved on the valve core rod (210).

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