A pressure stabilizing valve

Abstract

The utility model discloses a kind of pressure stabilizing valves, relate to the technical field of pressure stabilizing valve, including valve body, the valve body is equipped with through-hole and oil outlet, the one end of through-hole is inlet, the oil outlet is communicated with through-hole, the through-hole is equipped with valve, the valve is retractably arranged along the axial direction of through-hole;The valve includes integrally connected first cylinder part and second cylinder part.This application sets valve on valve body, throttle groove is equipped on valve, when small flow oil liquid flows into valve body, chamfer part and the hole wall of inlet are separated from stop, inlet is communicated with oil outlet by throttle groove, flow resistance is relatively larger at this time, when large flow oil liquid flows into valve body, chamfer part and the hole wall of inlet are separated from stop, valve is completely retracted through-hole, inlet is directly communicated with oil outlet, flow resistance is relatively smaller at this time, and further solve the technical problem that existing valve cannot realize big flow resistance when small flow, small flow resistance when large flow.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure regulating valves, and in particular to a pressure regulating valve. Background Technology

[0002] In conventional valves, flow rate and flow resistance generally have a positive correlation; that is, the higher the flow rate, the higher the flow resistance. However, conventional products cannot meet the specific requirements of a system. For example, a pressure regulating valve after the fuel pump of a certain engine model requires high flow resistance at low flow rates and low flow resistance at high flow rates, a function that existing products cannot achieve. Utility Model Content

[0003] To address the shortcomings in the aforementioned background technology, this utility model proposes a pressure regulating valve that solves the technical problem that existing valves cannot achieve high flow resistance at low flow rates and low flow resistance at high flow rates.

[0004] The technical solution of this utility model is implemented as follows: A pressure regulating valve includes a valve body, the valve body having a through hole and an oil outlet, one end of the through hole being an oil inlet, the oil outlet communicating with the through hole, and a valve capable of blocking the oil outlet being provided inside the through hole, the valve being extendable and retractable along the axial direction of the through hole; the valve includes a first cylindrical part and a second cylindrical part integrally connected, the diameter of the first cylindrical part being larger than the diameter of the second cylindrical part, and a circular stop part integrally connected to the end of the second cylindrical part away from the first cylindrical part. The diameter of the cylindrical part is larger than the diameter of the circular stop part. A chamfered part for blocking the oil inlet is provided between the second cylindrical part and the circular stop part. The circular stop part is provided with a throttling groove. When the valve body is closed, the chamfered part is in stop-fit ​​with the hole wall of the oil inlet. When a small flow of oil flows into the valve body, the chamfered part is disengaged from the hole wall of the oil inlet, and the oil inlet is connected to the oil outlet through the throttling groove. When a large flow of oil flows into the valve body, the chamfered part is disengaged from the hole wall of the oil inlet, the valve is fully retracted into the through hole, and the oil inlet is directly connected to the oil outlet. This application provides a valve on the valve body with a throttling groove. When a small flow of oil flows into the valve body, the chamfered part disengages from the inlet wall, and the inlet connects to the outlet through the throttling groove. At this time, the flow resistance is relatively high. When a large flow of oil flows into the valve body, the chamfered part disengages from the inlet wall, the valve fully retracts into the through hole, and the inlet connects directly to the outlet. At this time, the flow resistance is relatively low. This achieves the goal of high flow resistance at low flow rates and low flow resistance at high flow rates, thereby solving the technical problem that existing valves cannot achieve high flow resistance at low flow rates and low flow resistance at high flow rates.

[0005] Preferably, the throttling groove is located at one end of the circular stop near the oil outlet; a plurality of throttling grooves are symmetrically arranged along the end face of the circular stop; the throttling groove is a triangular pyramidal shaped groove. When a small flow of oil flows into the valve body, the chamfered portion disengages from the inlet wall, and the small flow of oil entering through the inlet flows into the oil outlet through the throttling groove. The throttling groove is a triangular pyramidal shaped groove, with the bottom surface of the triangular pyramidal shaped groove located at the inlet end. This arrangement facilitates the flow of oil into the throttling groove. A plurality of throttling grooves are symmetrically arranged along the end face of the circular stop to improve the efficiency of oil flowing into the oil outlet through the throttling groove. The specific number of throttling grooves can be set according to actual needs.

[0006] Preferably, an end cap assembly is connected to the end of the through hole away from the oil inlet. A spring is provided between the end cap assembly and the valve. One end of the spring abuts against the first cylindrical part of the valve, and the other end is connected to the end cap assembly. The end cap assembly provides support for the spring, which is designed to allow the valve to extend and retract axially along the through hole. The spring force for the valve's axial extension and retraction along the through hole can be selected based on the actual impact force caused by the oil flow rate.

[0007] Preferably, the end cap assembly includes an end cap, on which a spring seat is provided, and the spring is sleeved on the spring seat. The spring seat is provided to limit and support the spring, preventing longitudinal displacement of the spring and ensuring that the position of the spring's axial elastic force is not skewed, thus guaranteeing that the spring stably provides axial elastic force to the valve.

[0008] Preferably, the valve body and the end cap are threaded together. The threaded connection between the valve body and the end cap facilitates the removal of the end cap from the valve body, improving the ease of end cap removal and replacement.

[0009] Preferably, the spring seat is T-shaped and has a washer. When the spring is fitted onto the spring seat, the end of the spring abuts against the washer. The washer is provided to withstand the compressive force of the spring, and also to ensure the sealing of the connection between the spring seat and the end cap, which is beneficial for achieving leak-free operation of the entire valve system. The T-shaped arrangement of the spring seat is to guide the axial extension and contraction of the spring, and thus guide the axial extension and contraction of the valve along the through hole.

[0010] Preferably, both the end cap and the spring seat are provided with a connection hole that can communicate with the outside atmosphere. The connection hole is provided to ensure the pressure balance inside and outside the valve body and to avoid the valve from expanding and contracting axially along the through hole due to the imbalance between the air pressure inside the valve body and the outside atmosphere.

[0011] Preferably, a filter screen is provided at the inlet of the connection hole on the end cap. The filter screen prevents excess debris from entering the valve body through the connection hole, which helps to improve the service life of the valve body.

[0012] Preferably, a second sealing ring is provided on the inner wall of the through hole of the valve body, and the outer surface of the end cap is adapted to the second sealing ring. The provision of the second sealing ring further improves the sealing effect at the connection between the valve body and the end cap, which is conducive to achieving leak-free operation of the entire valve system.

[0013] Preferably, a third sealing ring is provided on the inner wall of the through hole of the valve body, and the outer surface of the second cylindrical part of the valve is adapted to the third sealing ring. The second sealing ring, the third sealing ring, the end cap, the spring seat, and the valve body constitute a spring cavity that prevents oil from entering. The setting of the third sealing ring further improves the sealing effect at the connection between the valve body and the second cylindrical part of the valve, which is conducive to achieving leak-free operation of the entire valve system and preventing oil from entering the spring cavity along the gap between the valve body and the valve. The setting of the spring cavity provides space for the valve to extend and retract axially along the through hole.

[0014] The beneficial effects of this utility model are as follows: This utility model has a valve on the valve body with a throttling groove. When a small flow of oil flows into the valve body, the chamfered part disengages from the wall of the oil inlet and the oil inlet is connected to the oil outlet through the throttling groove. At this time, the flow resistance is relatively large. When a large flow of oil flows into the valve body, the chamfered part disengages from the wall of the oil inlet and the valve is completely retracted into the through hole. The oil inlet is directly connected to the oil outlet. At this time, the flow resistance is relatively small. Thus, the purpose of high flow resistance at low flow rate and low flow resistance at high flow rate is achieved. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of the pressure regulating valve of this utility model in the closed state.

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0018] Figure 3 This is a cross-sectional view of the pressure regulating valve of this invention when a relatively small flow of oil flows into it.

[0019] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0020] Figure 5 This is a cross-sectional view of the pressure regulating valve of this invention when a relatively large flow of oil flows into it.

[0021] Figure 6 for Figure 5 Enlarged view of point C in the middle.

[0022] Figure 7 This is a perspective view of the valve of this utility model.

[0023] In the figure, 1-valve body, 2-first sealing ring, 3-second sealing ring, 4-end cover assembly, 5-gasket, 6-spring seat, 7-spring, 8-valve, 9-third sealing ring, 10-chamfered part, 11-filter screen, 12-spring cavity, 13-throttling groove, 14-first cylindrical part, 15-second cylindrical part, 16-circular stop part, 17-connecting hole, 18-oil inlet, 19-oil outlet. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1, a pressure regulating valve, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the device includes a valve body 1, which has a through hole and an oil outlet. One end of the through hole is an oil inlet 18, and the oil outlet 19 communicates with the through hole. A valve 8, capable of blocking the oil outlet 19, is provided inside the through hole. The valve 8 is axially extendable along the through hole. The valve 8 includes a first cylindrical portion 14 and a second cylindrical portion 15 integrally connected. The diameter of the first cylindrical portion 14 is larger than the diameter of the second cylindrical portion 15. A circular stop portion 16 is integrally connected to the end of the second cylindrical portion 15 away from the first cylindrical portion 14. The diameter of the second cylindrical portion 15 is larger than the diameter of the circular stop portion 16. The valve body 1 has a chamfered portion 10 between the second cylindrical portion 15 and the circular stop portion 16 for blocking the oil inlet 18. The circular stop portion 16 has a throttling groove 13. When the valve body 1 is closed, the chamfered portion 10 is engaged with the hole wall of the oil inlet 18. When a small flow of oil flows into the valve body 1, the chamfered portion 10 is disengaged from the hole wall of the oil inlet 18, and the oil inlet 18 is connected to the oil outlet 19 through the throttling groove 13. When a large flow of oil flows into the valve body 1, the chamfered portion 10 is disengaged from the hole wall of the oil inlet 18, the valve 8 is fully retracted into the through hole, and the oil inlet 18 is directly connected to the oil outlet 19. This application provides a valve 8 on the valve body 1, with a throttling groove 13 on the valve 8. When a small flow of oil flows into the valve body 1, the chamfered part 10 disengages from the wall of the inlet 18, and the inlet 18 is connected to the outlet 19 through the throttling groove 13. At this time, the flow resistance is relatively large. When a large flow of oil flows into the valve body 1, the chamfered part 10 disengages from the wall of the inlet 18, and the valve 8 is completely retracted into the through hole. The inlet 18 is directly connected to the outlet 19, and the flow resistance is relatively small. This achieves the goal of high flow resistance at low flow rates and low flow resistance at high flow rates, thus solving the technical problem that existing valves cannot achieve high flow resistance at low flow rates and low flow resistance at high flow rates.

[0026] The valve body 1 is fitted with a first sealing ring 2, which provides an external sealing connection for the valve body 1. The terms "small flow rate" and "large flow rate" refer to relatively large and small flow rates. The valve body 1 has one inlet 18 and two outlets 19, symmetrically arranged radially, while the inlet 18 is arranged axially.

[0027] Example 2, based on Example 1, a pressure regulating valve, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the throttling groove 13 is located on the circular stop portion 16 near the oil outlet 19. A plurality of throttling grooves 13 are symmetrically arranged along the end face of the circular stop portion 16. Each throttling groove 13 is a triangular pyramidal shaped groove. When a small flow of oil flows into the valve body 1, the chamfered portion 10 disengages from the wall of the oil inlet 18, and the small flow of oil entering through the oil inlet 18 flows into the oil outlet 19 through the throttling groove 13. The throttling groove 13 is a triangular pyramidal shaped groove, with its bottom surface located at the oil inlet end. This arrangement facilitates the flow of oil into the throttling groove 13. A plurality of throttling grooves 13 are symmetrically arranged along the end face of the circular stop portion 16 to improve the efficiency of oil flowing into the oil outlet 19 through the throttling grooves 13. The specific number of throttling grooves 13 can be set according to actual needs.

[0028] Example 3, based on Example 1 or 2, a pressure regulating valve, such as Figure 1 , Figure 3 and Figure 5 As shown, an end cap assembly is connected to the end of the through hole away from the oil inlet 18. A spring 7 is provided between the end cap assembly and the valve 8. One end of the spring 7 abuts against the first cylindrical portion 14 on the valve 8, and the other end is connected to the end cap assembly. The end cap assembly provides support for the spring 7, which is designed to allow the valve 8 to extend and retract axially along the through hole. The elastic force of the spring 7 for the valve 8 to extend and retract axially along the through hole can be selected based on the impact force caused by the actual oil flow rate.

[0029] Example 4, based on Example 3, a pressure regulating valve, such as Figure 1 , Figure 3 and Figure 5 As shown, the end cap assembly includes an end cap 4, on which a spring seat 6 is provided, and the spring 7 is sleeved on the spring seat 6. The spring seat 6 is provided to limit and support the spring 7, preventing longitudinal displacement of the spring 7 and ensuring that the position of the spring 7's axial elastic force is stably provided to the valve 8.

[0030] Example 5, based on Example 4, a pressure regulating valve, such as Figure 1 , Figure 3 and Figure 5 As shown, the valve body 1 is threadedly connected to the end cover 4. The threaded connection between the valve body 1 and the end cover 4 facilitates the removal of the end cover 4 from the valve body 1, improving the ease of disassembly and replacement of the end cover 4.

[0031] Example 6, based on Example 5, a pressure regulating valve, such as Figure 1 , Figure 3 and Figure 5As shown, the spring seat 6 is T-shaped and has a gasket 5. When the spring 7 is fitted onto the spring seat 6, the end of the spring 7 abuts against the gasket 5. The gasket 5 is provided to withstand the compressive force of the spring 7. Simultaneously, the gasket 5 ensures a tight seal between the spring seat 6 and the end cap 4, facilitating leak-free operation of the entire valve system. Furthermore, the spring force provided by the spring 7 can be adjusted by increasing or decreasing the number of gaskets 5, thereby regulating the opening pressure of the valve 8. The T-shape of the spring seat 6 guides the axial extension and retraction of the spring 7, and consequently guides the axial extension and retraction of the valve 8 along the through hole.

[0032] Example 7, based on Example 6, a pressure regulating valve, such as Figure 1 , Figure 3 and Figure 5 As shown, both the end cap 4 and the spring seat 6 are provided with connection holes 17 that can communicate with the outside atmosphere. The connection holes 17 are provided to ensure the pressure balance inside and outside the valve body 1, and to avoid the valve 8 from being affected by the imbalance between the air pressure inside the valve body 1 and the outside atmosphere, thus ensuring the normal opening and closing of the pressure regulating valve of this application. Preferably, the end cap 4 and the spring seat 6 can be fixed by a threaded connection. When the end cap 4 and the spring seat 6 are threadedly connected, it is easy to remove the spring seat 6 from the end cap 4. When the end cap 4 and the spring seat 6 are fixedly connected, the connection hole 17 of the end cap 4 is connected to the connection hole 17 of the spring seat 6.

[0033] Example 8, based on Example 7, a pressure regulating valve, such as Figure 1 , Figure 3 and Figure 5 As shown, a filter screen 11 is provided at the inlet of the connection hole 17 on the end cap 4. The filter screen 11 prevents excess debris from entering the valve body 1 through the connection hole 17, which helps to improve the service life of the valve body 1. The filter screen 11 is pressed and fixed by the connection between the spring seat 6 and the end cap 4.

[0034] Example 9, based on Example 8, a pressure regulating valve, such as Figure 1 , Figure 3 and Figure 5 As shown, a second sealing ring 3 is provided on the inner wall of the through hole of the valve body 1, and the outer surface of the end cover 4 is adapted to the second sealing ring 3. The provision of the second sealing ring 3 further improves the sealing effect at the connection between the valve body 1 and the end cover 4, which is conducive to achieving leak-free operation of the entire valve system.

[0035] Example 10, based on Example 9, a pressure regulating valve, such as Figure 1 , Figure 3 and Figure 5As shown, a third sealing ring 9 is provided on the inner wall of the through hole of the valve body 1. The outer surface of the second cylindrical part 15 on the valve 8 is adapted to the third sealing ring 9. The second sealing ring 3, the third sealing ring 9, the end cap 4, the spring seat 6, and the valve body 1 constitute a spring cavity 12 that prevents oil from entering. The setting of the third sealing ring 9 further improves the sealing effect at the connection between the valve body 1 and the second cylindrical part 15 on the valve 8, which is conducive to achieving leak-free operation of the entire valve system and preventing oil from entering the spring cavity 12 along the gap between the valve body 1 and the valve 8. The setting of the spring cavity 12 provides space for the valve 8 to extend and retract axially along the through hole. The spring cavity 12 is connected to the atmosphere through the connecting hole 17, so that the opening pressure of the valve 8 is only related to the spring force and is not affected by the back pressure of the valve body 1 during operation.

[0036] In the implementation of Example 10, when installing the pressure stabilizing valve of this application: after processing each component of the pressure stabilizing valve of this application in sequence, the second sealing ring 3 and the third sealing ring 9 are arranged in sequence in the through hole of the valve body 1. The valve 8 is inserted from the end of the valve body 1 away from the oil inlet 18, and then the spring 7 is inserted. Then, a filter screen 11 is provided at the inlet of the connecting hole 17 on the end cover 4. Then, the spring seat 6 is installed. The filter screen 11 is squeezed and fixed by the connection between the spring seat 6 and the end cover 4. Then, a gasket 5 is fitted on the spring seat 6. Then, the end cover 4 is threadedly connected to the valve body 1, so that the spring 7 is fitted on the spring seat 6.

[0037] When the pressure regulating valve of this application is in use: when the valve body 1 is closed, the chamfered part 10 is in a stop-fitting engagement with the bore wall of the oil inlet 18, such as... Figure 1 and Figure 2 As shown; when a small flow of oil flows into valve body 1, the medium force overcomes the spring force, causing valve 8 to move. The chamfered part 10 disengages from the wall of the oil inlet 18, and valve 8 opens. However, because a small flow of oil flows into valve body 1, the medium force is small, and the displacement of valve 8 is small. The oil inlet 18 is connected to the oil outlet 19 through the throttling groove 13, as shown. Figure 3 and Figure 4 As shown; when a large flow of oil flows into the valve body 1, the chamfered part 10 disengages from the wall of the inlet 18. Because a large flow of oil flows into the valve body 1, the medium force is large, and the valve 8 completely retracts into the through hole, so the inlet 18 is directly connected to the outlet 19. Figure 5 and Figure 6 As shown.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure regulating valve, comprising a valve body (1), wherein the valve body (1) is provided with a through hole and an oil outlet (19), one end of the through hole is an oil inlet (18), and the oil outlet (19) communicates with the through hole, characterized in that, The through hole is provided with a valve (8) that can block the oil outlet (19). The valve (8) is axially extendable along the through hole. The valve (8) includes a first cylindrical part (14) and a second cylindrical part (15) integrally connected. The diameter of the first cylindrical part (14) is larger than the diameter of the second cylindrical part (15). A circular stop part (16) is integrally connected to the end of the second cylindrical part (15) away from the first cylindrical part (14). The diameter of the second cylindrical part (15) is larger than the diameter of the circular stop part (16). A valve for blocking the oil inlet is provided between the second cylindrical part (15) and the circular stop part (16). (18) The chamfered part (10) is provided with a throttling groove (13) on the circular stop part (16). When the valve body (1) is closed, the chamfered part (10) is stopped and engaged with the hole wall of the oil inlet (18). When a small flow of oil flows into the valve body (1), the chamfered part (10) is disengaged from the hole wall of the oil inlet (18), and the oil inlet (18) is connected to the oil outlet (19) through the throttling groove (13). When a large flow of oil flows into the valve body (1), the chamfered part (10) is disengaged from the hole wall of the oil inlet (18), the valve (8) is completely retracted into the through hole, and the oil inlet (18) is directly connected to the oil outlet (19).

2. The pressure regulating valve according to claim 1, characterized in that: The throttling groove (13) is located on one end of the circular stop (16) near the oil outlet (19); several throttling grooves (13) are symmetrically arranged along the end face of the circular stop (16); the throttling groove (13) is a triangular pyramidal groove.

3. The pressure regulating valve according to claim 1 or 2, characterized in that: An end cap assembly is connected to one end of the through hole away from the oil inlet (18). A spring (7) is provided between the end cap assembly and the valve (8). One end of the spring (7) abuts against the first cylindrical part (14) on the valve (8), and the other end is connected to the end cap assembly.

4. The pressure regulating valve according to claim 3, characterized in that: The end cap assembly includes an end cap (4), on which a spring seat (6) is provided, and a spring (7) is sleeved on the spring seat (6).

5. The pressure regulating valve according to claim 4, characterized in that: The valve body (1) is threadedly connected to the end cap (4).

6. The pressure regulating valve according to claim 5, characterized in that: The spring seat (6) is T-shaped and has a washer (5) on it. When the spring (7) is fitted onto the spring seat (6), the end of the spring (7) abuts against the washer (5).

7. The pressure regulating valve according to claim 6, characterized in that: Both the end cap (4) and the spring seat (6) are provided with connection holes (17) that can communicate with the outside atmosphere.

8. The pressure regulating valve according to claim 7, characterized in that: A filter screen (11) is provided at the inlet of the connection hole (17) on the end cap (4).

9. The pressure regulating valve according to claim 8, characterized in that: The valve body (1) has a second sealing ring (3) on the inner wall of the through hole, and the outer surface of the end cap (4) is adapted to the second sealing ring (3).

10. The pressure regulating valve according to claim 9, characterized in that: The valve body (1) has a third sealing ring (9) on the inner wall of the through hole. The outer surface of the second cylindrical part (15) on the valve (8) is adapted to the third sealing ring (9). The second sealing ring (3), the third sealing ring (9), the end cap (4), the spring seat (6) and the valve body (1) constitute a spring cavity (12) that can prevent oil from entering.

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