High stability pressure reducing valve

Abstract

The application relates to the technical field of pressure reducing valves, in particular to a high-stability pressure reducing valve, which comprises a valve body, two flow guides are fixedly installed in the valve body from left to right, flow channels are formed in the middle parts of the flow guides, valve spools are installed on the inner sides of the flow channels, diaphragms are fixedly installed at the top ends of the valve spools, two connecting seats are fixedly installed at the top end of the valve body from left to right, a shell is fixedly installed at the top end of the connecting seat, springs are installed in the shell, and the bottom ends of the springs are fixedly connected with the diaphragms. The high-stability pressure reducing valve is characterized in that fluid flows through the flow channels on the two flow guides in sequence and finally flows out from the right side of the valve body, when the inlet pressure changes, the fluid flows through the first flow channel and enters between the two flow guides, absorbs most of the inlet pressure fluctuation, outputs a relatively stable intermediate pressure, then the fluid with a relatively stable pressure flows out from the second flow channel, and the fluid flowing out of the valve body has a stable pressure through secondary regulation, so that the outlet pressure is stable.

Description

Technical Field

[0001] This invention relates to the field of pressure reducing valve technology, specifically a high-stability pressure reducing valve. Background Technology

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a desired outlet pressure through regulation, and automatically maintains a stable outlet pressure by relying on the energy of the medium itself. A pressure reducing valve is a throttling element with variable local resistance; that is, by changing the throttling area, the flow velocity and kinetic energy of the fluid are altered, resulting in different pressure losses, thereby achieving pressure reduction. Then, through the regulation of the control and adjustment system, the fluctuations in the downstream pressure are balanced with the spring force, keeping the downstream pressure constant within a certain error range.

[0003] When the inlet pressure of a conventional pressure reducing valve suddenly increases, the high-pressure fluid will first instantly push up the outlet pressure, resulting in a momentary peak in the outlet pressure. Conversely, when the inlet pressure drops sharply, a momentary trough will also be generated, resulting in large fluctuations in the outlet pressure.

[0004] To address the aforementioned issues, we have made improvements and proposed a highly stable pressure reducing valve. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: This invention provides a high-stability pressure reducing valve, comprising a valve body, wherein two guide plates are fixedly installed from left to right inside the valve body, a flow channel is formed in the middle of the guide plates, a valve core is installed inside the flow channel, a diaphragm is fixedly installed at the top of the valve core, two connecting seats are fixedly installed from left to right at the top of the valve body, a housing is fixedly installed at the top of the connecting seats, and the diaphragm is fixedly installed between the connecting seats and the housing, a spring is installed inside the housing, and the bottom end of the spring is fixedly connected to the diaphragm.

[0006] As a preferred embodiment of the present invention, an adjusting bolt is rotatably mounted on the top of the housing, and an adjusting plate is threadedly connected to the outer side of the adjusting bolt. The adjusting plate is slidably mounted inside the housing and is located at the top of the spring.

[0007] As a preferred embodiment of the present invention, a connecting shaft is provided above the valve body, and both ends of the connecting shaft are equipped with driving bevel gears. The two driving bevel gears mesh with two driven bevel gears respectively, and the two driven bevel gears are respectively installed on the top of two adjusting bolts.

[0008] As a preferred embodiment of the present invention, a handwheel is fixedly connected to the middle of the connecting shaft, a sliding sleeve is slidably installed on the outer side of the handwheel, a fixing bolt is threaded to the bottom of the sliding sleeve, and the top of the fixing bolt abuts against the handwheel. A connecting rod is fixedly connected to the side of the sliding sleeve, and the bottom end of the connecting rod is fixedly connected to the valve body.

[0009] As a preferred embodiment of the present invention, a partition plate is fixedly connected to the bottom of the connecting seat, and a through hole is provided inside the partition plate.

[0010] As a preferred embodiment of the present invention, a sleeve is fixedly installed in the middle of the partition plate, and the sleeve is sleeved on the outside of the valve core. A sealing ring is installed on the side of the valve core, and the sealing ring is in contact with the inner wall of the sleeve.

[0011] As a preferred embodiment of the present invention, pipes are provided on both the left and right sides of the valve body, and connecting flanges are fitted on the outer sides of the pipes. The connecting flanges are fixedly connected to the valve body by connecting bolts.

[0012] As a preferred embodiment of the present invention, a sealing sheet is provided between the pipe and the valve body, and an extension tube is installed on the inner side of the sealing sheet, with the extension tubes on both sides tightly fitted inside the pipe and the valve body, respectively.

[0013] As a preferred embodiment of the present invention, a protective shell is installed on the outer side of the driven bevel gear, and the connecting shaft extends through the interior of the protective shell and is rotatably connected to the protective shell.

[0014] The beneficial effects of this invention are: a highly stable pressure reducing valve in which fluid flows sequentially through the channels on two guide plates and finally flows out from the right side of the valve body. When the inlet pressure changes, the fluid flows through the first channel into the space between the two guide plates, absorbing most of the inlet pressure fluctuations and outputting a relatively stable intermediate pressure. Then, a fluid with a relatively stable pressure flows out from the second channel, which further regulates the flow, ensuring that the fluid flowing out of the valve body has a stable pressure and making the outlet pressure stable. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of a high-stability pressure reducing valve according to the present invention; Figure 2 This is a cross-sectional view of a high-stability pressure reducing valve according to the present invention; Figure 3 This invention relates to a high-stability pressure reducing valve. Figure 2 Enlarged view of point A in the middle; Figure 4 This invention relates to a high-stability pressure reducing valve. Figure 2 Enlarged view of point B in the middle; Figure 5 This is an exploded view of a high-stability pressure reducing valve according to the present invention; In the diagram: 1. Valve body; 2. Connecting seat; 3. Housing; 4. Protective shell; 5. Handwheel; 6. Connecting flange; 7. Guide plate; 8. Flow channel; 9. Valve core; 10. Diaphragm; 11. Spring; 12. Adjusting bolt; 13. Adjusting plate; 14. Sliding sleeve; 15. Fixing bolt; 16. Connecting rod; 17. Partition plate; 18. Through hole; 19. Sleeve; 20. Sealing ring; 21. Sealing plate; 22. Extension tube; 23. Pipe; 24. Connecting shaft; 25. Driving bevel gear; 26. Driven bevel gear. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] Example: Figure 1 - Figure 5 As shown, a high-stability pressure reducing valve includes a valve body 1. Two guide plates 7 are fixedly installed inside the valve body 1 from left to right. A flow channel 8 is formed in the middle of the guide plate 7. A valve core 9 is installed inside the flow channel 8. A diaphragm 10 is fixedly installed at the top of the valve core 9. Two connecting seats 2 are fixedly installed at the top of the valve body 1 from left to right. A housing 3 is fixedly installed at the top of the connecting seats 2, and the diaphragm 10 is fixedly installed between the connecting seats 2 and the housing 3. A spring 11 is installed inside the housing 3, and the bottom end of the spring 11 is fixedly connected to the diaphragm 10. Fluid enters from the left side of the valve body 1 and flows to the right side. During operation, the spring 11 pushes the diaphragm 10 downward, causing the valve core 9 to descend and disengage from the flow channel 8 on the guide plate 7. The fluid flows through the flow channels 8 on the two guide plates 7 in sequence, and finally flows out from the right side of the valve body 1. When the inlet pressure changes, the fluid flows through the first flow channel 8 and enters between the two guide plates 7, absorbing most of the inlet pressure fluctuations and outputting a relatively stable intermediate pressure. Then, a fluid with a relatively stable pressure flows out from the second flow channel 8, which further regulates the flow, so that the fluid flowing out of the valve body 1 has a stable pressure, making the outlet pressure stable.

[0018] Preferred, Reference Figure 2An adjusting bolt 12 is rotatably mounted on the top of the housing 3. An adjusting plate 13 is threadedly connected to the outside of the adjusting bolt 12, and the adjusting plate 13 is slidably mounted inside the housing 3. The adjusting plate 13 is located at the top of the spring 11. By rotating the adjusting bolt 12, the position of the adjusting plate 13 inside the housing 3 is changed, the deformation of the spring 11 is adjusted, the force of the spring 11 acting on the diaphragm 10 is modified, and thus the pressure of the output control valve core 9 closing with the flow channel 8 is controlled.

[0019] Preferred, Reference Figure 5 A connecting shaft 24 is provided on the top of the valve body 1. Both ends of the connecting shaft 24 are equipped with driving bevel gears 25. The two driving bevel gears 25 mesh with two driven bevel gears 26 respectively. The two driven bevel gears 26 are respectively installed on the top of two adjusting bolts 12. The threads of the two adjusting bolts 12 on both sides of the valve body 1 are opposite. The connecting shaft 24 drives the two driving bevel gears 25 to rotate simultaneously. The two driving bevel gears 25 control the rotation of the two adjusting bolts 12 simultaneously through the two driven bevel gears 26, making it more convenient to use.

[0020] Preferred, Reference Figure 1 and Figure 3 A handwheel 5 is fixedly connected to the middle of the connecting shaft 24. A sliding sleeve 14 is slidably installed on the outer side of the handwheel 5. A fixing bolt 15 is threadedly connected to the bottom of the sliding sleeve 14, and the top of the fixing bolt 15 abuts against the handwheel 5. A connecting rod 16 is fixedly connected to the side of the sliding sleeve 14, and the bottom end of the connecting rod 16 is fixedly connected to the valve body 1. After adjusting the position of the adjusting plate 13, the fixing bolt 15 is rotated so that the end of the fixing bolt 15 abuts against the outer surface of the handwheel 5, thereby making the sliding sleeve 14 and the handwheel 5 a whole. The state of the handwheel 5 is fixed by the connecting rod 16, which has the effect of preventing loosening.

[0021] Preferred, Reference Figure 2 and Figure 4 A partition 17 is fixedly connected to the bottom of the connecting seat 2. A through hole 18 is opened inside the partition 17. A cavity is formed between the partition 17 and the diaphragm 10. When the pressure at the output end changes, the fluid flows into or out of the cavity through the through hole 18, smoothly changing the pressure in the cavity, making the movement of the valve core 9 more stable, and reducing the impact of the valve core 9.

[0022] Preferred, Reference Figure 2 and Figure 4 A sleeve 19 is fixedly installed in the middle of the partition 17, and the sleeve 19 is sleeved on the outside of the valve core 9. A sealing ring 20 is installed on the side of the valve core 9, and the sealing ring 20 fits against the inner wall of the sleeve 19. The opening and closing of the valve core 9 moves along the sleeve 19, and the sleeve 19 plays a guiding role. The sealing ring 20 between the valve core 9 and the sleeve 19 can block the upper and lower sides of the partition 17, so that the fluid can only flow in and out through the through hole 18.

[0023] Preferred, Reference Figure 5 The valve body 1 has pipes 23 on both the left and right sides. A connecting flange 6 is fitted on the outside of the pipe 23. The connecting flange 6 is fixedly connected to the valve body 1 by connecting bolts. A sealing plate 21 is provided between the pipe 23 and the valve body 1. An extension tube 22 is installed on the inside of the sealing plate 21. The extension tubes 22 on both sides are tightly fitted inside the pipe 23 and the valve body 1, respectively. A protective shell 4 is installed on the outside of the driven bevel gear 26. The connecting shaft 24 passes through the inside of the protective shell 4 and is rotatably connected to the protective shell 4. The sealing plate 21 is provided between the pipe 23 and the valve body 1 to increase the sealing performance. The valve body 1 has a protruding structure at the end. A recessed part is formed between the sealing plate 21 and the extension tube 22. The protruding structure on the valve body 1 is embedded in the recessed part on the sealing plate 21. The extension tube 22 on the sealing plate 21 increases the overlapping area between the sealing plate 21, the pipe 23 and the valve body 1, further improving the sealing effect. A conventional sealing rubber ring is also provided between the sealing plate 21, the pipe 23 and the valve body 1.

[0024] Working principle: Both ends of the valve body 1 are connected to the two pipe sections 23 through connecting flanges 6 respectively, and a sealing plate 21 is installed between the valve body 1 and the pipe 23 to improve its sealing performance; By rotating the connecting shaft 24 via the handwheel 5, the rotating connecting shaft 24 drives the active bevel gears 25 at both ends to rotate, which in turn causes the adjusting bolt 12 at the upper end of the housing 3 to rotate via the driven bevel gear 26. The rotating adjusting bolt 12 drives the adjusting plate 13 to move downward inside the housing 3 through the thread and compresses the spring 11. The compressed spring 11 acts downward on the diaphragm 10, causing the diaphragm 10 to be concave downward and push the valve core 9 to move downward. The valve core 9 separates from the flow channel 8, so that the valve body 1 is opened. After the valve body 1 is opened, rotate the fixing bolt 15. The fixing bolt 15 moves up along the sliding sleeve 14 and abuts against the outer surface of the handwheel 5, making the sliding sleeve 14 and the handwheel 5 a whole. Under the action of the connecting rod 16, the state of the handwheel 5 is fixed to prevent the handwheel 5 from being accidentally touched. During use, fluid flows in from the left side of valve body 1 and out from the right side. When the pressure on the right side of valve body 1 increases, fluid flows from through hole 18 into the cavity between baffle 17 and diaphragm 10. The pressure in the cavity increases, pushing diaphragm 10 upward, which in turn causes valve core 9 to move upward, reducing the distance between valve core 9 and flow channel 8 or even closing flow channel 8. When the pressure on the right side of valve body 1 decreases, the pressure in the cavity decreases accordingly. Spring 11 pushes diaphragm 10, reducing the cavity volume, causing valve core 9 to move downward, and reopening valve body 1.

[0025] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-stability pressure reducing valve, comprising a valve body (1), characterized in that, Two guide plates (7) are fixedly installed inside the valve body (1) from left to right. A flow channel (8) is opened in the middle of the guide plate (7). A valve core (9) is installed inside the flow channel (8). A diaphragm (10) is fixedly installed at the top of the valve core (9). Two connecting seats (2) are fixedly installed at the top of the valve body (1) from left to right. A housing (3) is fixedly installed at the top of the connecting seat (2). The diaphragm (10) is fixedly installed between the connecting seat (2) and the housing (3). A spring (11) is installed inside the housing (3). The bottom end of the spring (11) is fixedly connected to the diaphragm (10).

2. The high-stability pressure reducing valve according to claim 1, characterized in that, An adjusting bolt (12) is rotatably mounted on the top of the housing (3). An adjusting plate (13) is threadedly connected to the outside of the adjusting bolt (12), and the adjusting plate (13) is slidably mounted inside the housing (3). The adjusting plate (13) is located at the top of the spring (11).

3. The high-stability pressure reducing valve according to claim 1, characterized in that, A connecting shaft (24) is provided above the valve body (1). Both ends of the connecting shaft (24) are equipped with active bevel gears (25). The two active bevel gears (25) mesh with two driven bevel gears (26) respectively. The two driven bevel gears (26) are respectively installed on the top of two adjusting bolts (12).

4. The high-stability pressure reducing valve according to claim 3, characterized in that, A handwheel (5) is fixedly connected to the middle of the connecting shaft (24). A sliding sleeve (14) is slidably installed on the outer side of the handwheel (5). A fixing bolt (15) is threadedly connected to the bottom of the sliding sleeve (14), and the top of the fixing bolt (15) abuts against the handwheel (5). A connecting rod (16) is fixedly connected to the side of the sliding sleeve (14), and the bottom end of the connecting rod (16) is fixedly connected to the valve body (1).

5. A high-stability pressure reducing valve according to claim 1, characterized in that, The bottom of the connecting seat (2) is fixedly connected to a partition (17), and the partition (17) has a through hole (18) inside.

6. A high-stability pressure reducing valve according to claim 5, characterized in that, A sleeve (19) is fixedly installed in the middle of the partition (17), and the sleeve (19) is sleeved on the outside of the valve core (9). A sealing ring (20) is installed on the side of the valve core (9), and the sealing ring (20) is in contact with the inner wall of the sleeve (19).

7. A high-stability pressure reducing valve according to claim 1, characterized in that, The valve body (1) is provided with pipes (23) on both the left and right sides. A connecting flange (6) is fitted on the outside of the pipe (23). The connecting flange (6) is fixedly connected to the valve body (1) by connecting bolts.

8. A high-stability pressure reducing valve according to claim 7, characterized in that, A sealing plate (21) is provided between the pipe (23) and the valve body (1). An extension pipe (22) is installed on the inner side of the sealing plate (21). The extension pipes (22) on both sides are tightly fitted inside the pipe (23) and the valve body (1).

9. A high-stability pressure reducing valve according to claim 3, characterized in that, A protective shell (4) is installed on the outer side of the driven bevel gear (26), and the connecting shaft (24) extends through the interior of the protective shell (4) and is rotatably connected to the protective shell (4).

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