CN223306373U

CN223306373U - Relief valve

Info

Publication number: CN223306373U
Application number: CN202422891301.XU
Authority: CN
Inventors: 刘江; 张成刚; 曲春秋; 刘传运
Original assignee: Zhejiang Sanshang Zhidi Technology Co ltd
Current assignee: Zhejiang Sanshang Zhidi Technology Co ltd
Priority date: 2024-11-26
Filing date: 2024-11-26
Publication date: 2025-09-05
Anticipated expiration: 2034-11-26

Abstract

The utility model belongs to the technical field of hydraulic valves and discloses a relief valve. This relief valve includes a valve seat, an adjusting rod and a valve core assembly. A limiter is provided on the valve seat through a mounting hole. The limiter partially protrudes from the inner wall of the valve seat. The valve core assembly is accommodated in the valve seat. The adjusting rod is at least partially located in the valve seat and abuts against the valve core assembly. The adjusting rod can move along the axial direction of the valve seat. The limiter abuts against the adjusting rod and is used to limit the limit position of the adjusting rod moving out of the valve seat. The limiter is provided on the valve seat through a mounting hole to limit the limit position of the adjusting rod, avoiding the complex split valve seat or high-precision machined mounting groove in the traditional design, thereby reducing the number of parts and reducing manufacturing costs; making the installation of the limiter simple and improving assembly efficiency. By adjusting the adjusting rod to adjust the set pressure of this relief valve, the relief valve can stably maintain the hydraulic system within the preset range, thereby improving the stability and reliability of the entire hydraulic system.

Description

Overflow valve

Technical Field

The utility model relates to the technical field of hydraulic valves, in particular to an overflow valve.

Background

The overflow valve is one of pressure control valves, can be used for guiding excessive hydraulic oil back to the oil tank so as to avoid system damage caused by overhigh pressure, and is widely applied to various hydraulic systems. The overflow valve comprises an adjusting rod and a valve core assembly, and the set pressure of the overflow valve can be changed by adjusting the position of the adjusting rod. At present, in order to prevent dangerous situations such as oil leakage and the like caused by excessive adjustment of an adjusting rod, a common overflow valve is usually limited in a mechanical limiting mode, the first is that the valve seat is designed to limit the adjusting rod in a split mode, the parts of the overflow valve are more, the cost is high, the overflow valve is not suitable for current cost management, the second is that an installation groove is processed in the valve seat, and a steel wire check ring is arranged in the installation groove to limit the adjusting rod, so that the overflow valve has high processing precision requirement and low assembly efficiency.

Accordingly, there is a need to provide an overflow valve to solve the above-mentioned problems.

Disclosure of utility model

The utility model aims to provide an overflow valve which has the advantages of less parts, reduced manufacturing cost, simple installation and improved assembly efficiency.

To achieve the purpose, the utility model adopts the following technical scheme:

An overflow valve, comprising:

The valve seat is provided with a limiting piece in a penetrating way through the mounting hole, and the limiting piece is partially protruded out of the inner wall of the valve seat;

the valve core assembly is accommodated in the valve seat, the adjusting rod is at least partially positioned in the valve seat and abuts against the valve core assembly, the adjusting rod can move along the axial direction of the valve seat, and the limiting piece abuts against the adjusting rod and is used for limiting the limiting position of the adjusting rod moving outwards of the valve seat.

Preferably, the limiting piece is in interference fit with the mounting hole.

Preferably, the limiting piece is in threaded fit with the mounting hole.

Preferably, a shaft shoulder is arranged on the outer side wall of the adjusting rod, and the shaft shoulder can be abutted to the limiting piece.

Preferably, the number of the limiting members is one, or the number of the limiting members is a plurality, and the plurality of the limiting members are distributed around the circumference of the valve seat.

Preferably, the adjusting rod is in threaded connection with the valve seat.

Preferably, the relief valve further includes:

the locking nut is in threaded connection with the part of the adjusting rod, which is positioned outside the valve seat, and the locking nut is in butt joint with the valve seat.

Preferably, the valve seat is provided with a valve port and an oil inlet, the oil inlet is communicated with the valve port through an oil passing channel, the valve core assembly is at least partially slidably arranged in the oil passing channel, an oil passing gap exists between the periphery of the valve core assembly and the oil passing channel, hydraulic oil can flow into the oil passing gap through the oil inlet, and the valve core assembly is used for opening or closing the valve port.

Preferably, the valve core assembly includes:

The valve core and the elastic piece are arranged between the valve core and the adjusting rod, and the valve core is used for opening or closing the valve port.

Preferably, the overflow valve further comprises a sealing element, and the sealing element is sleeved on the adjusting rod so as to seal the adjusting rod and the valve seat in the radial direction.

The utility model has the beneficial effects that:

The overflow valve comprises a valve seat, an adjusting rod and a valve core component, wherein a limiting part penetrates through a mounting hole in the valve seat, the limiting part protrudes out of the inner wall of the valve seat, the valve core component is contained in the valve seat, the adjusting rod is at least partially positioned in the valve seat and abuts against the valve core component, the adjusting rod can axially move along the valve seat, and the limiting part abuts against the adjusting rod and is used for limiting the limiting position of the adjusting rod moving outwards of the valve seat. The position of the adjusting rod is adjusted to adjust the set pressure of the overflow valve, so that the overflow valve can stably maintain the hydraulic system within a preset range, and the stability and reliability of the whole hydraulic system are improved. The limiting part is an independent part and is arranged on the valve seat in a penetrating way through the mounting hole, so that the limiting part is simple and convenient to mount, and the assembly efficiency is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of an overflow valve provided by the present utility model.

In the figure:

1. valve seat, 11, inner cavity, 12, valve port, 13, oil inlet, 14, oil passage, 15, oil return port;

2. A limiting piece;

3. adjusting lever 31, shaft shoulder;

4. 41, valve core, 42, elastic piece;

5. A lock nut;

6. and a seal.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In order to solve the above problems, as shown in fig. 1, the present embodiment provides an overflow valve, which includes a valve seat 1, an adjusting rod 3 and a valve core assembly 4, wherein a limiting member 2 is disposed on the valve seat 1 through a mounting hole, the limiting member 2 partially protrudes out of an inner wall of the valve seat 1, the valve core assembly 4 is contained in the valve seat 1, the adjusting rod 3 is at least partially located in the valve seat 1 and abuts against the valve core assembly 4, the adjusting rod 3 can move along an axial direction of the valve seat 1, and the limiting member 2 abuts against the adjusting rod and is used for limiting a limiting position of the adjusting rod 3 moving outwards of the valve seat 1.

The setting pressure of the overflow valve can be adjusted by adjusting the position of the adjusting rod 3, so that the overflow valve can stably maintain the hydraulic system within a preset range, and the stability and reliability of the whole hydraulic system are improved. The limiting piece 2 is arranged on the valve seat 1 in a penetrating way through the mounting hole to limit the limiting position of the adjusting rod 3 moving outwards of the valve seat 1, so that complex split valve seats or mounting grooves machined with high precision in the traditional design are avoided, the number of parts is reduced, the manufacturing cost is reduced, and the limiting piece 2 is an independent part and is arranged on the valve seat 1 in a penetrating way through the mounting hole, so that the limiting piece 2 is simple and convenient to mount, and the assembly efficiency is improved.

In an alternative embodiment, the limiting member 2 is in interference fit with the mounting hole. The tight connection between the limiting piece 2 and the valve seat 1 can be ensured, the limiting piece 2 is not easy to loosen, the limiting position of the adjusting rod 3 moving outwards of the valve seat 1 can be well limited, and the reliability is good.

In the specific implementation process, the size of the limiting piece 2 is slightly larger than the size of the mounting hole, and the limiting piece 2 is tightly penetrated in the mounting hole in a pressing-in or thermal expansion and contraction mode and the like, so that the interference insertion of the limiting piece 2 on the valve seat 1 is realized. The limiting part 2 is a cylindrical pin, the cylindrical pin has high strength and hardness, can bear high pressure and impact force, is used as a standardized element, has relatively low production cost, is easy to purchase and stock, and can reduce production cost and improve production efficiency and quality stability.

In an alternative embodiment, the limiting member 2 is in threaded engagement with the mounting hole. When the limiting piece 2 needs to be replaced, the operation can be completed only by reversely rotating the limiting piece 2, and complex disassembly and reinstallation processes are not needed, so that time and cost can be saved, and operation difficulty and risk can be reduced.

In the concrete implementation process, the hole wall of the mounting hole is provided with threads matched with the limiting piece 2, so that the limiting piece 2 is in threaded fit with the mounting hole. Specifically, the limiting part 2 is a screw, the screw is a common fastening piece, the production cost is relatively low, the purchasing and the stock are easy, the production cost of the overflow valve can be reduced, meanwhile, the installation and maintenance cost can be reduced due to the universality and the operability of the screw, and the overall economic benefit is improved.

In some embodiments, the number of the stoppers 2 is one. The overflow valve has the advantages that the structure is simpler, the number of parts and the time consumed by assembly are reduced, the production cost is reduced, and the production speed is improved.

In other embodiments, the number of the stoppers 2 is plural, and the plural stoppers 2 are distributed around the circumference of the valve seat 1. The impact force of the adjusting rod 3 on the valve seat 1 can be dispersed by the plurality of limiting pieces 2, the load born by the single limiting piece 2 is reduced, the structural strength of the overflow valve can be enhanced, the compression resistance and the service life of the overflow valve are improved, and the distribution of the plurality of limiting pieces 2 can provide more contact points for the adjusting rod 3, so that the stability and the reliability of limiting operation are improved.

Specifically, the outer side wall of the adjusting lever 3 is provided with a shoulder 31, and the shoulder 31 can abut against the stopper 2. When the adjusting rod 3 moves axially to adjust the set pressure, the shaft shoulder 31 thereon moves together and abuts against the limiting piece 2 when reaching the limit position, so as to prevent the adjusting rod 3 from moving continuously and prevent dangerous situations such as oil leakage caused by the fact that the adjusting rod 3 is screwed out of the valve seat 1.

Specifically, the adjusting rod 3 is screwed with the valve seat 1. That is, the adjusting rod 3 can be fixed with the valve seat 1 by screwing the adjusting rod 3, and the depth of the adjusting rod 3 inserted into the valve seat 1 can be changed by changing the screwing depth, so that the set pressure of the overflow valve is changed, and the overflow valve is convenient and quick and easy to operate.

Further, as shown in fig. 1, the overflow valve further comprises a lock nut 5, the lock nut 5 is in threaded connection with a portion of the adjusting rod 3 located outside the valve seat 1, and the lock nut 5 abuts against the valve seat 1. The lock nut 5 is connected to the part of the adjusting rod 3 outside the valve seat 1 through threads, so that the adjusting rod 3 can be tightly fixed, looseness caused by vibration or pressure fluctuation in the working process is prevented, the stability of the adjusting rod 3 is improved, the pressure value set by the overflow valve is ensured not to be changed due to looseness of the adjusting rod 3, and stable operation of a hydraulic system is ensured. When the set pressure needs to be adjusted, the locking nut 5 is loosened, the adjusting rod 3 is screwed to a required position, and then the locking nut 5 is screwed to be abutted against the valve seat 1, so that locking and looseness prevention of the adjusting rod 3 are realized.

Specifically, as shown in fig. 1, a valve port 12 and an oil inlet 13 are formed in the valve seat 1, the oil inlet 13 is communicated with the valve port 12 through an oil passing channel 14, the valve core assembly 4 is at least partially slidably arranged in the oil passing channel 14, an oil passing gap exists between the periphery of the valve core assembly 4 and the oil passing channel 14, hydraulic oil can flow into the oil passing gap through the oil inlet 13, and the valve core assembly 4 is used for opening or closing the valve port 12. When the pressure in the hydraulic system is greater than the set pressure, hydraulic oil enters the oil passing channel 14 from the oil inlet 13 and flows into the oil passing gap to generate pressure on the valve core assembly 4, wherein the pressure is the pressure of the hydraulic system, and the hydraulic oil can push the valve core assembly 4 to move leftwards to open the valve port 12 because the pressure of the hydraulic system is greater than the set pressure, namely greater than the pretightening force of the elastic piece 42, and after the hydraulic oil flows into the inner cavity 11, the hydraulic oil flows into the oil tank through the oil return port 15, so that the pressure of the hydraulic system is reduced, and then the valve core assembly 4 moves rightwards to reset to close the valve port 12 under the action of the elastic force, so that the hydraulic oil cannot flow out.

In the present embodiment, as shown in fig. 1, the valve element assembly 4 includes a valve element 41 and an elastic member 42, the elastic member 42 is disposed between the valve element 41 and the adjustment lever 3, and the valve element 41 is used to open or close the valve port 12. The pre-tightening force of the elastic piece 42, namely the set pressure of the overflow valve, is changed by adjusting the position of the adjusting rod 3.

Specifically, the elastic member 42 is a spring.

Specifically, as shown in fig. 1, the overflow valve further includes a sealing member 6, wherein the sealing member 6 is sleeved on the adjusting rod 3 to seal the adjusting rod 3 and the valve seat 1 in a radial direction. The hydraulic oil flowing into the valve seat 1 is prevented from leaking by the provision of the seal 6.

In this embodiment, the adjusting lever 3 is provided with a mounting groove, and the sealing member 6 is mounted in the mounting groove. The mounting groove provides a fixed mounting location for the seal 6, ensuring that the seal 6 is accurately aligned with the area to be sealed. This helps to reduce the risk of leakage due to improper positioning of the seal 6, and the design of the mounting groove allows the seal 6 to be securely fastened to the adjustment rod 3, and the seal 6 is less prone to falling off or shifting even under high pressure or vibration conditions.

Specifically, the seal 6 is an O-ring.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. An overflow valve, comprising:

The valve seat (1), the valve seat (1) is provided with a limiting piece (2) in a penetrating way through the mounting hole, and the limiting piece (2) partially protrudes out of the inner wall of the valve seat (1);

Adjust pole (3) and case subassembly (4), case subassembly (4) accept in disk seat (1), adjust pole (3) at least part be located in disk seat (1) and with case subassembly (4) offset, adjust pole (3) can follow the axial motion of disk seat (1), locating part (2) with adjust pole (3) offset and be used for the restriction adjust pole (3) to the extreme position of disk seat (1) external motion.

2. Overflow valve according to claim 1, characterized in that the stop (2) is interference fit with the mounting hole.

3. Overflow valve according to claim 1, characterized in that the stop (2) is screw-fitted with the mounting hole.

4. Overflow valve according to claim 1, characterized in that the outer side wall of the adjusting lever (3) is provided with a shoulder (31), which shoulder (31) can be brought into abutment with the stop (2).

5. The relief valve according to claim 1, characterized in that the number of the stop members (2) is one, or the number of the stop members (2) is plural, and that the plurality of stop members (2) are distributed around the circumference of the valve seat (1).

6. Overflow valve according to claim 1, characterized in that the adjusting rod (3) is screwed with the valve seat (1).

7. The overflow valve according to claim 4, characterized in that the overflow valve further comprises:

The locking nut (5), locking nut (5) threaded connection in adjust pole (3) be located the valve seat (1) outside part, locking nut (5) with valve seat (1) butt.

8. The overflow valve according to any of claims 1-7, characterized in that the valve seat (1) is provided with a valve port (12) and an oil inlet (13), the oil inlet (13) is communicated with the valve port (12) through an oil passing channel (14), the valve core assembly (4) is at least partially slidably arranged in the oil passing channel (14), an oil passing gap exists between the periphery of the valve core assembly (4) and the oil passing channel (14), hydraulic oil can flow into the oil passing gap through the oil inlet (13), and the valve core assembly (4) is used for opening or closing the valve port (12).

9. The relief valve according to claim 8, characterized in that the spool assembly (4) comprises:

The valve comprises a valve core (41) and an elastic piece (42), wherein the elastic piece (42) is arranged between the valve core (41) and the adjusting rod (3), and the valve core (41) is used for opening or closing the valve port (12).

10. The overflow valve according to any of claims 1-7, further comprising a sealing element (6), said sealing element (6) being arranged over the regulating stem (3) for radially sealing the regulating stem (3) with the valve seat (1).