Proportional pressure reducing valve

Abstract

The utility model belongs to the field of valves, and particularly relates to a proportional pressure reducing valve. The utility model provides a proportional pressure reducing valve which is reliable to use. The throttling valve comprises a valve body and a valve element, a valve cavity is formed in the valve body, an inlet is formed in the lower portion of the valve body, an outlet is formed in the upper portion of the valve body, and the inlet and the outlet are both communicated with the valve cavity, and is characterized in that a throttling section is arranged between the inlet and the outlet in the valve cavity, and a throttling sleeve assembly is arranged in the throttling section and comprises a plurality of throttling sleeve bodies which are connected in series up and down; an opening groove is formed in the lower side in the throttling sleeve body, a throttling hole is formed in the upper side in the throttling sleeve body, and the diameter of the throttling hole is smaller than that of the opening groove; the valve rod is provided with a throttling body corresponding to each throttling sleeve body, and each throttling body comprises a conical section and a throttling column section; and the conical section corresponds to the open slot of the throttling sleeve body.

Description

Technical Field

[0001] This utility model belongs to the field of valves, and specifically relates to a proportional pressure reducing valve. Background Technology

[0002] Proportional pressure reducing valves are important control components in fluid transport systems, controlling the flow rate and on / off state of the medium in pipelines. However, in existing technology, the proportional pressure reducing valve structure is based on a fixed proportional pressure difference across the valve, making it impossible to adjust within a certain range. Consequently, pressure reducing valves are often used in conjunction with other valves. Utility Model Content

[0003] This invention addresses the aforementioned problems by providing a reliable proportional pressure reducing valve.

[0004] This utility model adopts the following technical solution: It includes a valve body and a valve core. The valve body contains a valve cavity, with an inlet at the lower part and an outlet at the upper part. Both the inlet and outlet communicate with the valve cavity. The key feature is that a throttling section is located between the inlet and outlet within the valve cavity. A throttling sleeve assembly is provided within this section. The throttling sleeve assembly includes multiple throttling sleeves connected in series. The lower inner side of each throttling sleeve has an open groove, and the upper inner side has a throttling orifice. The diameter of the throttling orifice is smaller than the diameter of the open groove. A throttling fluid is provided on the valve stem corresponding to each throttling sleeve. The throttling fluid includes a conical section and a throttling column section. The conical section corresponds to the open groove of the throttling sleeve. The throttling column section cooperates with the throttling orifice. A sealing slope is provided on the uppermost throttling sleeve of the throttling sleeve assembly, and a sealing section that cooperates with the sealing slope is provided on the valve stem.

[0005] As a preferred embodiment of this utility model, a guide rod is provided at the lower end of the valve stem, and a guide sleeve that cooperates with the guide rod is provided at the lower part of the valve cavity; an end cap is provided at the lower end of the valve body, and a cavity is formed between the end cap and the guide sleeve, with the end of the guide rod located in the cavity, and a balance hole connecting the cavity and the valve cavity is provided on the guide sleeve.

[0006] As another preferred embodiment of this utility model, a valve cover is provided at the upper end of the valve body, and the valve stem passes through the center of the valve cover and extends into the valve cavity; a pressure ring is provided in the valve cavity, with its upper end in contact with the valve cover and its lower end in contact with the upper end of the throttling sleeve assembly, and a through hole corresponding to the outlet is provided on the pressure ring; multiple throttling sleeves of the throttling sleeve assembly are connected as one unit by the pressure of the pressure ring and fixed in the valve cavity.

[0007] Furthermore, gaskets are provided between the pressure ring and the throttling sleeve assembly, and between the throttling sleeve assembly and the valve body.

[0008] As a third preferred embodiment of this utility model, a packing sealing assembly is provided above the valve cover.

[0009] Furthermore, the packing sealing assembly includes sealing packing disposed inside the valve cover and outside the valve cover, a packing sleeve disposed above the valve cover, a packing pressure plate disposed above the packing sleeve, and the packing pressure plate and the valve cover are connected by a bolt assembly.

[0010] As a fourth preferred embodiment of this utility model, an anti-rotation component for the valve stem is also provided above the valve cover.

[0011] Furthermore, the anti-rotation assembly is disposed on the support cylinder above the valve cover, and a bearing cover is disposed above the support cylinder. A thrust ball bearing is disposed between the bearing cover and the valve stem. An anti-rotation block that cooperates with the valve stem is disposed inside the support cylinder, and an anti-rotation pin that cooperates with the anti-rotation block and the valve stem is disposed on the support cylinder. A valve stem nut is disposed above the bearing cover, and the valve stem nut is threadedly connected to the valve stem.

[0012] As a fifth preferred embodiment of this utility model, the valve stem nut is connected to the handwheel.

[0013] The beneficial effects of this utility model are as follows: By incorporating a multi-stage throttling and pressure-reducing structure with a throttling sleeve assembly inside the valve body, and in conjunction with the normal lifting and lowering action of the valve stem, this utility model achieves continuous and adjustable proportional pressure reduction, overcoming the limitation of traditional pressure-reducing valves that cannot adjust the proportional range. The optimized flow channel structure through a non-concentric inlet and outlet arrangement improves fluid guidance and adjustment response speed; the use of a packing seal structure ensures the sealing reliability of the valve stem transmission parts during long-term operation. The anti-rotation block structure, combined with a pin connection, effectively prevents valve stem rotation, ensuring adjustment accuracy; the overall structural design is reasonable, with good sealing performance and high pressure regulation stability, making it suitable for applications requiring high output pressure control accuracy and possessing broad application value. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0016] In the attached diagram, 1 is the handwheel, 2 is the valve stem nut, 3 is the branch pipe, 4 is the bearing cover, 5 is the thrust ball bearing, 6 is the valve cover, 7 is the gasket, 8 is the pressure ring, 9 is the washer, 10 is the valve body, 11 is the guide sleeve, 12 is the end cover, 13 is the guide rod, 14 is the valve stem, 15 is the throttling sleeve assembly, 16 is the throttling sleeve body, 17 is the sealing section, 18 is the support cylinder, 19 is the sealing packing, 20 is the packing sleeve, 21 is the packing pressure plate, 22 is the anti-rotation block, 23 is the pin, 24 is the opening groove, 25 is the throttling orifice, 26 is the conical section, and 27 is the throttling column section. Detailed Implementation

[0017] This utility model includes a valve body 10 and a valve core. The valve body 10 contains a valve cavity, with an inlet at the lower part and an outlet at the upper part. Both the inlet and outlet communicate with the valve cavity. A throttling section is located between the inlet and outlet within the valve cavity. A throttling sleeve assembly 15 is provided within the throttling section. The throttling sleeve assembly 15 includes multiple throttling sleeves 16 connected in series. The lower side of the interior of each throttling sleeve 16 has an opening groove 24, and the upper side of the interior of each throttling sleeve 16 has a throttling orifice 25. The diameter of the throttling orifice 25 is smaller than the diameter of the opening groove 24. Each valve stem 14 is provided with a throttling fluid corresponding to each throttling sleeve 16. The throttling fluid includes a conical section 26 and a throttling column section 27. The conical section 26 corresponds to the opening groove 24 of the throttling sleeve 16. The throttling column section 27 cooperates with the throttling orifice 25. A sealing slope is provided on the uppermost throttling sleeve 16 of the throttling sleeve assembly 15, and a sealing section 17 that cooperates with the sealing slope is provided on the valve stem 14. By setting up multiple throttling sleeves 16 connected in series and corresponding throttling fluids, multi-stage throttling control is achieved, improving the stability and adjustability of the pressure reduction process. The structural cooperation between the throttling orifice 25 and the opening groove 24 forms an effective throttling cavity, improving the controllable release efficiency of fluid energy. The sealing slope structure matches the sealing section 17, enhancing sealing performance and preventing media leakage.

[0018] A guide rod 13 is provided at the lower end of the valve stem 14, and a guide sleeve 11 that cooperates with the guide rod 13 is provided at the lower part of the valve cavity; an end cap 12 is provided at the lower end of the valve body 10, and a cavity is formed between the end cap 12 and the guide sleeve 11. The end of the guide rod 13 is located in the cavity, and a balance hole is provided on the guide sleeve 11 to connect the cavity and the valve cavity. By providing the guide rod 13 and the cooperating guide sleeve 11, the stability and guiding accuracy of the valve stem 14 movement are improved; the balance hole in the cavity helps to balance the pressure difference at both ends of the guide sleeve 11, thereby improving reliability.

[0019] A valve cover 6 is provided at the upper end of the valve body 10, and the valve stem 14 passes through the center of the valve cover 6 and extends into the valve cavity. A pressure ring 8 is provided in the valve cavity, with its upper end contacting the valve cover 6 and its lower end contacting the upper end of the throttling sleeve assembly 15. The pressure ring 8 is provided with a through hole corresponding to the outlet. Multiple throttling sleeves 16 of the throttling sleeve assembly 15 are connected as a whole and fixed in the valve cavity by the pressure of the pressure ring 8. By using the pressure ring 8 to press the multiple throttling sleeves 16 into a whole, the throttling assembly can be stably positioned in the valve cavity, avoiding uneven throttling caused by component displacement or vibration.

[0020] Gaskets 9 are provided between the pressure ring 8 and the throttling sleeve assembly 15, and between the throttling sleeve assembly 15 and the valve body 10.

[0021] A packing seal assembly is provided above the valve cover 6.

[0022] The packing sealing assembly includes a sealing packing 19 disposed inside the valve cover 6 and outside the valve cover 6. A packing sleeve 20 is disposed above the valve cover 6, and a packing pressure plate 21 is disposed above the packing sleeve 20. The packing pressure plate 21 and the valve cover 6 are connected by a bolt assembly.

[0023] An anti-rotation component for the valve stem 14 is also provided above the valve cover 6.

[0024] The anti-rotation assembly is located on the support cylinder 18 above the valve cover 6. A bearing cover 4 is located above the support cylinder 18, and a thrust ball bearing 5 is located between the bearing cover 4 and the valve stem 14. An anti-rotation block 22 that cooperates with the valve stem 14 is located inside the support cylinder 18, and an anti-rotation pin that cooperates with the anti-rotation block 22 and the valve stem 14 is located on the support cylinder 18. A valve stem nut is located above the bearing cover 4, and the valve stem nut is threadedly connected to the valve stem 14.

[0025] The valve stem nut is connected to the handwheel 1.

[0026] Example: As shown in the figure, this utility model includes a handwheel 1, a valve stem nut 2, a branch pipe 3, a bearing cover 4, a thrust ball bearing 5, a valve cover 6, a gasket 7, a pressure ring 8, a washer 9, a valve body 10, a guide sleeve 11, an end cover 12, a valve stem 14, a throttling sleeve 16, a support cylinder 18, a sealing packing 19, a packing pressure sleeve 20, a packing pressure plate 21, an anti-rotation block 22, a pin 23, and fasteners. The valve body 10 has non-concentric inlet and outlet channels at both ends, and is equipped with a throttling sleeve assembly 15, a pressure ring 8, and a washer 9 inside. The upper end of the valve body 10 is sealed with the valve cover 6 through a gasket. The valve cover 6 has a stuffing box with an inner hole for placing sealing packing 19. The upper end of the sealing packing 19 is fitted with a packing sleeve 20 and a packing pressure plate 21. The packing pressure plate 21 is pre-tightened with a nut to ensure a reliable seal at the valve cover 6. The valve stem 14 is fixed with the anti-rotation block 22 by a pin 23 to prevent the valve stem 14 from rotating. The lower end is fitted with the throttling sleeve assembly 15. The sealing section 17 on the valve stem 14 is fitted with the sealing slope of the uppermost throttling sleeve 16 for sealing. At the same time, the valve stem 14 is fitted with the throttling sleeve 16 through the throttling column section 27 and the tapered section 26 to complete the throttling and pressure reduction. The upper end of the valve stem 14 is fitted with the valve stem nut 2 through a trapezoidal thread. The valve stem nut 2 is fitted with the thrust ball bearing 5 and is set in the upper bearing cover 4. The upper end of the valve stem nut 2 is equipped with a branch pipe 3 and a handwheel 1.

[0027] The throttling orifice 25 of the throttling sleeve 16 has a sealing surface structure that mates with the throttling column section 27 of the valve stem 14.

[0028] The valve cover 6 has a boss at the lower end and an inner hole for a stuffing box and bolt holes inside.

[0029] The anti-rotation block 22 is provided with multiple inner holes. One inner hole is engaged with the valve cover 6 through a pin 23, and the other inner hole is engaged with a bolt.

[0030] The bearing cover 4 has an inner hole and a bolt hole, which are fitted with the thrust ball bearing 5.

[0031] The valve stem nut 2 has an internal trapezoidal thread that mates with the valve cover 6, an outer circle that mates with the thrust ball bearing 5, and a square structure at the upper end that mates with the handwheel 1.

[0032] The packing pressure plate 21 is provided with multiple inner holes, and the packing is pressed tightly by fasteners in cooperation with the packing pressure sleeve 20.

[0033] The valve body 10 has one inner hole at its lower end welded to the guide sleeve 11, and another inner hole welded to the lower end cover 12 for sealing.

[0034] The multi-stage throttling and pressure-reducing structure of this invention solves the problem that existing proportional pressure-reducing valves cannot achieve a certain range of adjustment function when fixed.

[0035] The working process of this invention will be explained below with reference to the diagrams.

[0036] The fluid flows through one end of the valve inlet. At this time, the handle is rotated counterclockwise to the fully open position. The medium will pass through the throttling sleeve assembly 15 in the valve body 10 in sequence and flow out at the outlet. The flow rate, pressure and medium blockage of the valve can be controlled by manually adjusting the handle.

[0037] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A proportional pressure reducing valve, comprising a valve body (10) and a valve core, wherein the valve body (10) contains a valve cavity, an inlet is provided at the lower part of the valve body (10), and an outlet is provided at the upper part of the valve body (10), both the inlet and the outlet being connected to the valve cavity, characterized in that: The valve cavity is located between the inlet and outlet as a throttling section, and a throttling sleeve assembly (15) is provided in the throttling section. The throttling sleeve assembly (15) includes multiple throttling sleeve bodies (16) connected in series. The lower side of the inside of each throttling sleeve body (16) is provided with an opening groove (24), and the upper side of the inside of each throttling sleeve body (16) is provided with a throttling hole (25). The diameter of the throttling hole (25) is smaller than the diameter of the opening groove (24). The valve stem (14) corresponds to each throttling sleeve. Each body (16) is provided with a throttling fluid, which includes a conical section (26) and a throttling column section (27); the conical section (26) corresponds to the opening groove (24) of the throttling sleeve body (16); the throttling column section (27) cooperates with the throttling hole (25); a sealing slope is provided on the throttling sleeve body (16) at the uppermost end of the throttling sleeve assembly (15), and a sealing section (17) that cooperates with the sealing slope is provided on the valve stem (14).

2. A proportional pressure reducing valve according to claim 1, characterized in that: The lower end of the valve stem (14) is provided with a guide rod (13), and the lower part of the valve cavity is provided with a guide sleeve (11) that cooperates with the guide rod (13); the lower end of the valve body (10) is provided with an end cap (12), and there is a cavity between the end cap (12) and the guide sleeve (11). The end of the guide rod (13) is located in the cavity, and the guide sleeve (11) is provided with a balance hole that connects the cavity and the valve cavity.

3. A proportional pressure reducing valve according to claim 1, wherein: The valve body (10) is provided with a valve cover (6) at the upper end. The valve stem (14) passes through the center of the valve cover (6) and extends into the valve cavity. A pressure ring (8) is provided in the valve cavity, with its upper end in contact with the valve cover (6) and its lower end in contact with the upper end of the throttling sleeve assembly (15). The pressure ring (8) is provided with a through hole corresponding to the outlet. Multiple throttling sleeves (16) of the throttling sleeve assembly (15) are connected as one unit by the pressure of the pressure ring (8) and fixed in the valve cavity.

4. A proportional pressure reducing valve according to claim 3, wherein: Gaskets (9) are provided between the pressure ring (8) and the throttling sleeve assembly (15), and between the throttling sleeve assembly (15) and the valve body (10).

5. A proportional pressure reducing valve according to claim 3, wherein: A packing seal assembly is provided above the valve cover (6).

6. A proportional pressure reducing valve according to claim 5, wherein: The packing sealing assembly includes a sealing packing (19) disposed inside the valve cover (6) and outside the valve cover (6), a packing sleeve (20) disposed above the valve cover (6), a packing pressure plate (21) disposed above the packing sleeve (20), and the packing pressure plate (21) and the valve cover (6) are connected by a bolt assembly.

7. A proportional pressure reducing valve according to claim 3, wherein: An anti-rotation assembly for the valve stem (14) is also provided above the valve cover (6).

8. A proportional pressure reducing valve according to claim 7, characterized in that: The anti-rotation assembly is located on the support cylinder (18) above the valve cover (6). A bearing cover (4) is located above the support cylinder (18). A thrust ball bearing (5) is located between the bearing cover (4) and the valve stem (14). An anti-rotation block (22) that cooperates with the valve stem (14) is located inside the support cylinder (18). An anti-rotation pin that cooperates with the anti-rotation block (22) and the valve stem (14) is located on the support cylinder (18). A valve stem nut (2) is located above the bearing cover (4). The valve stem nut (2) is threadedly connected to the valve stem (14).

9. A proportional pressure reducing valve according to claim 8, wherein: The valve stem nut (2) is connected to the handwheel (1).

Images