Pressure reducing valve with improved manual exhaust structure

Abstract

The utility model relates to the technical field of pressure reducing valves, in particular to a pressure reducing valve with an improved manual exhaust structure, a pressure reducing part extends into a valve body part, the pressure reducing part comprises a blocking part, when the blocking part moves upwards, gas in the valve body part leaks, and when the blocking part moves downwards, the gas in the valve body part cannot leak; the connecting assembly is fixed to the bottom end of the screw through the reinforcing assembly, when the screw rotates, the inner ring and the outer ring limit the screw to rotate on the surface of the blocking body, the screw is prevented from inclining, balls at the bottoms of the inner ring and the outer ring roll on the surface of the blocking body, friction force between the inner ring and the blocking body and friction force between the outer ring and the blocking body are reduced, and rotation of the screw is facilitated. Balls on the surface of the limiting ring roll in an annular groove, friction force between the limiting ring and the blocking body is reduced, and rotation of the screw is facilitated; when the pressure of the low-pressure gas in the containing groove needs to be relieved, the hand wheel is rotated to enable the blocking body to leave the pressure relief opening, and after pressure relief is completed, the hand wheel is reversely rotated to enable the blocking body to block the pressure relief opening.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing valve technology, and in particular to a pressure reducing valve with an improved manual venting structure. Background Technology

[0002] A pressure reducing valve is a device used to control the pressure of fluids (such as gases or liquids). It primarily reduces the pressure of a high-pressure fluid at the inlet to the required outlet pressure and maintains a stable outlet pressure. Pressure reducing valves are widely used in industrial, civil, and medical fields to ensure that systems operate under safe and stable pressure.

[0003] Chinese patent application CN200910094467.6 describes an active time-delay pressure reducing valve. This valve utilizes a throttling valve body, a throttling valve core, and a return spring to actively drive the control end of the pressure reducing valve using the fluid's own pressure, achieving a delayed pressure reduction output. However, this valve lacks a manual venting mechanism. When it is necessary to adjust the pressure inside the valve to a level outside the fluid's own pressure range, this cannot be done manually, limiting the valve's application range. Utility Model Content

[0004] The main purpose of this utility model is to provide a pressure reducing valve with an improved manual venting structure to solve the problem in the related art that the pressure reducing valve does not have a manual venting mechanism, and when it is necessary to adjust the pressure inside the pressure reducing valve to outside the fluid's own pressure range, it cannot be operated by the manual venting mechanism.

[0005] To achieve the above objectives, according to one aspect of the present invention, a pressure reducing valve with an improved manual venting structure is provided, including an inlet pipe and an outlet pipe, wherein the inlet pipe is used to introduce gas into the pressure reducing valve and the outlet pipe is used to output gas from the pressure reducing valve, and further includes a valve body portion disposed above the inlet pipe and the outlet pipe for connecting the inlet pipe and the outlet pipe.

[0006] The pressure reducing part extends into the valve body and includes a blocking part. When the blocking part moves upward, the gas inside the valve body leaks out; when the blocking part moves downward, the gas inside the valve body cannot leak out.

[0007] The valve cover is fixedly mounted on the top of the valve body and located on the outer ring of the pressure reducing part, and is used to provide support for the pressure reducing part.

[0008] Furthermore, the valve body includes a valve body, a cavity, and a pressure relief port. The valve body is fixedly installed at the top of the inlet pipe and the outlet pipe. The cavity is located at the bottom of the valve body and is connected to both the inlet pipe and the outlet pipe. The pressure relief port is located on the side of the valve body and is connected to the cavity.

[0009] Furthermore, the valve cover portion includes a valve cover body, a vertical column, and several guide grooves. The valve cover body is fixedly disposed above the valve body, the vertical column is fixedly disposed inside the valve cover body and extends to the top of the cavity, and the guide grooves are all disposed vertically on the inner side of the vertical column.

[0010] Furthermore, the pressure-reducing part also includes a limiting part and an adjusting part, the adjusting part passing through the limiting part and being threadedly connected to the limiting part, and the blocking part being rotatably disposed at the bottom of the adjusting part.

[0011] Furthermore, the limiting part includes a limiting cylinder, several sliders, several springs and a bottom block. The limiting cylinder is fixedly disposed on the top of the bottom block, the springs are all fixedly disposed on the top of the bottom block and located on the outer ring of the limiting cylinder, and the sliders are all fixedly disposed on the outer ring of the limiting cylinder.

[0012] Furthermore, the adjustment unit includes a manual assembly, several reinforcing components, a connecting component, and a limiting ring. The manual assembly includes a handwheel and a screw. The reinforcing component is fixedly disposed at the bottom end of the screw and located below the bottom block. The reinforcing component includes a top block, a bottom rod, an inner rod, and an outer rod. The connecting component includes an inner ring, an outer ring, and several ball bearings.

[0013] Furthermore, the screw is inserted through the limiting cylinder and threadedly connected to it. The handwheel is fixedly mounted on the top of the screw. The tops of the inner and outer rods are fixedly connected to the screw via top blocks. The bottom ends of the inner and outer rods are fixedly connected to the two ends of the bottom rod, respectively. The two ends of the bottom rod are fixedly connected to the upper surfaces of the inner and outer rings, respectively. The lower surfaces of the inner and outer rings are rotatably provided with several balls. The limiting ring is fixedly mounted at the bottom of the outer ring of the screw and located below the inner and outer rings. The surface of the limiting ring is rotatably provided with several balls.

[0014] Furthermore, the blocking part includes a blocking body and an annular groove. The blocking body is slidably disposed within the cavity, and the annular groove is disposed within the blocking body to accommodate a limiting ring. The limiting ring is slidably disposed within the annular groove, and the bottom end of the screw is rotatably connected to the blocking body.

[0015] Compared with the prior art, this utility model has the following beneficial effects: The reinforcing component fixes the connecting component to the bottom end of the screw. When the screw rotates, the inner and outer rings restrict the screw to rotate on the surface of the plug, preventing the screw from tilting. The balls at the bottom of the inner and outer rings roll on the surface of the plug, reducing the friction between the inner and outer rings and the plug, facilitating the rotation of the screw. The balls on the surface of the limiting ring roll in the annular groove, reducing the friction between the limiting ring and the plug, facilitating the rotation of the screw. When it is necessary to release the gas at a lower pressure in the container, turn the handwheel to move the plug away from the pressure relief port. After the pressure relief is completed, turn the handwheel in the opposite direction to make the plug block the pressure relief port. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall design of this utility model;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is a schematic diagram of the valve core structure of this utility model;

[0019] Figure 4 This is a cross-sectional view of the valve core of this utility model;

[0020] Figure 5 This is a schematic diagram of the pressure-reducing part of the present invention. Figure 1 ;

[0021] Figure 6 This is a schematic diagram of the pressure-reducing part of the present invention. Figure 2 ;

[0022] Figure 7 This is a partial enlarged view of the present invention.

[0023] Illustration:

[0024] 1. Imported pipeline;

[0025] 2. Export pipeline;

[0026] 3. Valve body; 31. Valve body; 32. Cavity; 33. Pressure relief port;

[0027] 4. Valve cover section; 41. Valve cover body; 42. Vertical column; 43. Guide groove;

[0028] 5. Pressure reducing part; 51. Limiting part; 52. Adjusting part; 53. Blocking part; 511. Limiting cylinder; 512. Slider; 513. Spring; 514. Bottom block; 521. Handwheel; 522. Screw; 523. Reinforcing assembly; 524. Connecting assembly; 525. Limiting ring; 526. Top block; 527. Bottom rod; 528. Inner rod; 529. Outer rod; 5241. Inner ring; 5242. Outer ring; 5243. Ball bearing; 531. Blocking body; 532. Annular groove. Detailed Implementation

[0029] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0030] Please see Figures 1 to 7This embodiment provides a pressure reducing valve with an improved manual venting structure, including an inlet pipe 1 and an outlet pipe 2. The inlet pipe 1 is used to introduce gas into the pressure reducing valve, and the outlet pipe 2 is used to output gas from the pressure reducing valve. It also includes a valve body 3, which is disposed above the inlet pipe 1 and the outlet pipe 2 and is used to connect the inlet pipe 1 and the outlet pipe 2.

[0031] Pressure reducing part 5 extends into valve body part 3. Pressure reducing part 5 includes blocking part 53. When blocking part 53 moves upward, gas in valve body part 3 leaks out. When blocking part 53 moves downward, gas in valve body part 3 cannot leak out.

[0032] Valve cover 4 is fixedly mounted on the top of valve body 3 and located on the outer ring of pressure reducing part 5, and is used to provide support for pressure reducing part 5.

[0033] The valve body 3 includes a valve body 31, a cavity 32 and a pressure relief port 33. The valve body 31 is fixedly installed at the top of the inlet pipe 1 and the outlet pipe 2. The cavity 32 is located at the bottom of the valve body 31 and is connected to both the inlet pipe 1 and the outlet pipe 2. The pressure relief port 33 is located on the side of the valve body 31 and is connected to the cavity 32.

[0034] The valve cover part 4 includes a valve cover body 41, a vertical column 42 and several guide grooves 43. The valve cover body 41 is fixedly disposed above the valve body 31, the vertical column 42 is fixedly disposed inside the valve cover body 41 and extends to the top of the cavity 32, and the guide grooves 43 are all disposed vertically on the inner side of the vertical column 42.

[0035] The pressure relief part 5 also includes a limiting part 51 and an adjusting part 52. The adjusting part 52 passes through the limiting part 51 and is threadedly connected to the limiting part 51. The blocking part 53 is rotatably disposed at the bottom of the adjusting part 52.

[0036] The limiting part 51 includes a limiting cylinder 511, a plurality of sliders 512, a plurality of springs 513 and a base block 514. The limiting cylinder 511 is fixedly disposed on the top of the base block 514, the springs 513 are all fixedly disposed on the top of the base block 514 and located on the outer ring of the limiting cylinder 511, and the sliders 512 are all fixedly disposed on the outer ring of the limiting cylinder 511.

[0037] The slider 512 can slide up and down in the guide groove 43, restricting the limiting cylinder 511 to slide up and down in the vertical column 42. When the blocking body 531 slides up and down in the cavity 32, the limiting cylinder 511 slides up and down in the vertical column 42, and the blocking body 531 is stationary in the cavity 32. When the handwheel 521 is turned to drive the screw 522 to rotate, since the slider 512 restricts the limiting cylinder 511 from rotating in the vertical column 42, the screw 522 can move up and down in the limiting cylinder 511, driving the blocking body 531 to block or leave the pressure relief port 33.

[0038] The top of the spring 513 is fixedly connected to the valve body 31. When there is no external force, the spring 513 extends, pushing the plug 531 downward to block the pressure relief port 33, ensuring the sealing of the pressure reducing valve. When the gas pressure in the cavity 32 is greater than the design value, the upward thrust of the gas on the plug 531 is greater than the elastic force of the spring 513, and the plug 531 moves upward, away from the bottom of the pressure relief port 33, and the spring 513 contracts. When the gas pressure in the cavity 32 is less than the design value, the upward thrust of the gas on the plug 531 is less than the elastic force of the spring 513, and the spring 513 rebounds, pushing the plug 531 downward to block the pressure relief port 33.

[0039] The adjustment unit 52 includes a manual assembly, several reinforcing components 523, a connecting component 524, and a limiting ring 525. The manual assembly includes a handwheel 521 and a screw 522. The reinforcing component 523 is fixedly disposed at the bottom end of the screw 522 and located below the bottom block 514. The reinforcing component 523 includes a top block 526, a bottom rod 527, an inner rod 528, and an outer rod 529. The connecting component 524 includes an inner ring 5241, an outer ring 5242, and several ball bearings 5243.

[0040] The screw 522 passes through the limiting cylinder 511 and is threadedly connected to the limiting cylinder 511. The handwheel 521 is fixedly installed at the top of the screw 522. The tops of the inner rod 528 and the outer rod 529 are fixedly connected to the screw 522 through the top block 526. The bottom ends of the inner rod 528 and the outer rod 529 are fixedly connected to the two ends of the bottom rod 527 respectively. The two ends of the bottom rod 527 are fixedly connected to the upper surfaces of the inner ring 5241 and the outer ring 5242 respectively. The lower surfaces of the inner ring 5241 and the outer ring 5242 are rotatably provided with a number of balls 5243. The limiting ring 525 is fixedly installed at the bottom of the outer ring of the screw 522 and is located below the inner ring 5241 and the outer ring 5242. The surface of the limiting ring 525 is rotatably provided with a number of balls 5243.

[0041] The blocking part 53 includes a blocking body 531 and an annular groove 532. The blocking body 531 is slidably disposed in the cavity 32. The annular groove 532 is disposed in the blocking body 531 to accommodate a limiting ring 525. The limiting ring 525 is slidably disposed in the annular groove 532. The bottom end of the screw 522 is rotatably connected to the blocking body 531.

[0042] The reinforcing component 523 fixes the connecting component 524 to the bottom end of the screw 522. When the screw 522 rotates, the inner ring 5241 and the outer ring 5242 restrict the screw 522 to rotate on the surface of the plug 531, preventing the screw 522 from tilting. The balls 5243 at the bottom of the inner ring 5241 and the outer ring 5242 roll on the surface of the plug 531, reducing the friction between the inner ring 5241 and the outer ring 5242 and the plug 531, facilitating the rotation of the screw 522. The balls 5243 on the surface of the limiting ring 525 roll in the annular groove 532, reducing the friction between the limiting ring 525 and the plug 531, facilitating the rotation of the screw 522.

[0043] The high-pressure gas pipeline is connected to the inlet pipeline 1. After the high-pressure gas enters the inlet pipeline 1, it pushes the plug 531 upward. The plug 531 moves the bottom block 514 upward through the screw 522, compressing the spring 513 and causing it to contract. After the plug 531 leaves the top of the inlet pipeline 1, the high-pressure gas enters the cavity 32 from the inlet pipeline 1 and flows out from the outlet pipeline 2 for later use. When the pressure of the high-pressure gas in the cavity 32 is too high, the plug 531 continues to be compressed upward, and the spring 513 continues to contract. When the bottom end of the plug 531 leaves the bottom end of the pressure relief port 33, the high-pressure gas in the cavity 32 is discharged from the pressure relief port 33, reducing its internal pressure. When the pressure drops to a level that is insufficient to counteract the rebound force of the spring 513, the spring 513 rebounds, pushing the plug 531 downward through the bottom block 514 and the screw 522, blocking the pressure relief port. 33. The high-pressure gas in the cavity 32 no longer leaks out, maintaining its pressure stability. At this time, the gas pressure in the cavity 32 is insufficient to overcome the elastic force of the spring 513 to push the blockage body 531 above the pressure relief port 33. If it is necessary to further reduce the gas pressure in the cavity 32, the handwheel 521 needs to be turned. The handwheel 521 drives the screw 522 to rotate and move upward along the limiting cylinder 511. The screw 522 drives the blockage body 531 to move upward through the limiting ring 525, leaving the bottom of the pressure relief port 33. The gas in the cavity 32 is discharged from the pressure relief port 33, reducing its internal gas pressure. When the gas pressure in the cavity 32 drops to the design value, the handwheel 521 is turned in the opposite direction, causing the blockage body 531 to move downward and block the pressure relief port 33. The gas in the cavity 32 no longer leaks out from the pressure relief port 33, maintaining it at a constant low pressure.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A pressure reducing valve with an improved manual venting structure, comprising an inlet pipe (1) and an outlet pipe (2), wherein the inlet pipe (1) is used to introduce gas into the pressure reducing valve, and the outlet pipe (2) is used to output gas from the pressure reducing valve, characterized in that, Also includes: Valve body (3), which is located above the inlet pipe (1) and the outlet pipe (2) and is used to connect the inlet pipe (1) and the outlet pipe (2); Pressure reducing part (5) extends into valve body part (3). Pressure reducing part (5) includes a blocking part (53). When the blocking part (53) moves upward, the gas in valve body part (3) leaks out. When the blocking part (53) moves downward, the gas in valve body part (3) cannot leak out. Valve cover (4) is fixedly disposed on the top of valve body (3) and located on the outer ring of pressure reducing part (5) to provide support for pressure reducing part (5).

2. The pressure reducing valve with an improved manual venting structure according to claim 1, characterized in that, The valve body (3) includes a valve body (31), a cavity (32) and a pressure relief port (33). The valve body (31) is fixedly installed at the top of the inlet pipe (1) and the outlet pipe (2). The cavity (32) is located at the bottom of the valve body (31) and is connected to both the inlet pipe (1) and the outlet pipe (2). The pressure relief port (33) is located on the side of the valve body (31) and is connected to the cavity (32).

3. The pressure reducing valve with an improved manual venting structure according to claim 2, characterized in that, The valve cover part (4) includes a valve cover body (41), a vertical column (42) and several guide grooves (43). The valve cover body (41) is fixedly disposed above the valve body (31). The vertical column (42) is fixedly disposed inside the valve cover body (41) and extends to the top of the cavity (32). The guide grooves (43) are all disposed vertically inside the vertical column (42).

4. The pressure reducing valve with an improved manual venting structure according to claim 1, characterized in that, The pressure relief part (5) also includes a limiting part (51) and an adjusting part (52). The adjusting part (52) passes through the limiting part (51) and is threadedly connected to the limiting part (51). The blocking part (53) is rotatably disposed at the bottom of the adjusting part (52).

5. The pressure reducing valve with an improved manual venting structure according to claim 4, characterized in that, The limiting part (51) includes a limiting cylinder (511), a plurality of sliders (512), a plurality of springs (513) and a bottom block (514). The limiting cylinder (511) is fixedly disposed on the top of the bottom block (514). The springs (513) are all fixedly disposed on the top of the bottom block (514) and located on the outer ring of the limiting cylinder (511). The sliders (512) are all fixedly disposed on the outer ring of the limiting cylinder (511).

6. The pressure reducing valve with an improved manual venting structure according to claim 5, characterized in that, The adjustment unit (52) includes a manual assembly, several reinforcing components (523), a connecting component (524), and a limiting ring (525). The manual assembly includes a handwheel (521) and a screw (522). The reinforcing component (523) is fixedly disposed at the bottom end of the screw (522) and located below the bottom block (514). The reinforcing component (523) includes a top block (526), ​​a bottom rod (527), an inner rod (528), and an outer rod (529). The connecting component (524) includes an inner ring (5241), an outer ring (5242), and several ball bearings (5243).

7. The pressure reducing valve with an improved manual venting structure according to claim 6, characterized in that, The screw (522) passes through the limiting cylinder (511) and is threadedly connected to the limiting cylinder (511). The handwheel (521) is fixedly mounted on the top of the screw (522). The tops of the inner rod (528) and the outer rod (529) are fixedly connected to the screw (522) through the top block (526). The bottom ends of the inner rod (528) and the outer rod (529) are fixedly connected to the two ends of the bottom rod (527). The bottom rod (527) is fixedly mounted on the top of the handwheel (522). 27) Both ends are fixedly connected to the upper surfaces of the inner ring (5241) and the outer ring (5242) respectively. The lower surfaces of the inner ring (5241) and the outer ring (5242) are rotatably provided with a number of balls (5243). The limiting ring (525) is fixedly provided at the bottom of the outer ring of the screw (522) and located below the inner ring (5241) and the outer ring (5242). The surface of the limiting ring (525) is rotatably provided with a number of balls (5243).

8. The pressure reducing valve with an improved manual venting structure according to claim 7, characterized in that, The blocking part (53) includes a blocking body (531) and an annular groove (532). The blocking body (531) is slidably disposed in the cavity (32). The annular groove (532) is disposed in the blocking body (531) to accommodate a limiting ring (525). The limiting ring (525) is slidably disposed in the annular groove (532). The bottom end of the screw (522) is rotatably connected to the blocking body (531).

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