CN218093667U

CN218093667U - Proportional pressure reducing overflow valve and hydraulic system

Info

Publication number: CN218093667U
Application number: CN202221689630.0U
Authority: CN
Inventors: 尹铁军; 邹卫
Original assignee: Hunan Kaienli Hydraulic Machinery Manufacturing Co ltd
Current assignee: Hunan Kaienli Hydraulic Machinery Manufacturing Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-12-20
Anticipated expiration: 2032-06-30

Abstract

The utility model provides a proportional pressure-reducing overflow valve, which comprises a magnetic pipe component and a valve sleeve arranged at one end of the magnetic pipe component, wherein a replaceable proportional coil is arranged in the magnetic pipe component, a valve core which can move back and forth in the valve sleeve is arranged in the valve sleeve, a spring is sleeved at one end of the valve core, which is close to the magnetic pipe component, and the spring can be pressed when the valve core moves; the valve sleeve and the valve core are also provided with a plurality of oil ports, and the valve core is also provided with a plurality of damping holes for buffering; the area of one end of the valve core close to the magnetic pipe assembly is smaller than that of the other end of the valve core. According to the proportional pressure reducing overflow valve with the structure, the damping holes can play a buffering role, the working stability of the proportional pressure reducing overflow valve is guaranteed, and the working noise and abnormal sound of the proportional pressure reducing overflow valve can be greatly reduced or eliminated. Thirdly, by arranging the proportional coil, proportional pressure reduction overflow can be realized, namely, the overflow function is realized. Furthermore, the utility model discloses still provide a hydraulic system.

Description

Proportional pressure reducing overflow valve and hydraulic system

Technical Field

The utility model relates to a hydraulic system field, in particular to proportion decompression overflow valve and hydraulic system.

Background

In recent years, with the development of science and technology, various types of valve blocks, such as proportional pressure reducing relief valves, are used more and more commonly, such as in various engineering machines, to protect pipelines from over-pressure.

The pressure reducing valves with the existing structures have various types, such as Thomas structures and Kawasaki structures, and have larger structural differences on the whole, but generally have unstable inlet pressure and unstable output pressure. In addition, in the working process, the problems of noise, abnormal sound and the like are easily caused by the currently used pressure reducing valve. In addition, the pressure reducing valve with the existing structure has relatively single function, and cannot realize proportional pressure reduction and overflow functions generally

In summary, how to provide a proportional pressure reducing relief valve with stable output pressure, no noise and abnormal sound in the working process, and an overflow function, and a hydraulic system including the proportional pressure reducing relief valve, have become technical problems that the skilled person needs to solve urgently.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the proportional pressure reducing overflow valve is stable in output pressure, free of noise and abnormal sound in the working process and provided with the overflow function, and the hydraulic system comprising the proportional pressure reducing overflow valve.

The utility model discloses a solution is realized like this: the utility model provides a proportional pressure relief valve, including the magnetron subassembly with set up in the valve barrel of magnetron subassembly one end, be equipped with removable proportional coil in the magnetron subassembly, be equipped with in the valve barrel and can make a round trip to move the case in the valve barrel, the case is close to the one end cover of magnetron subassembly is equipped with the spring, when the case removes, can extrude the spring; the valve sleeve and the valve core are also provided with a plurality of oil ports, and the valve core is also provided with a plurality of damping holes for buffering; the area of one end of the valve core close to the magnetic pipe assembly is smaller than that of the other end of the valve core. According to the proportional pressure reducing overflow valve with the structure, when the valve core is impacted by oil, part of oil can flow into the buffer cavity from the damping hole, so that the buffer effect is achieved, the working stability of the proportional pressure reducing overflow valve is guaranteed, and the working noise and abnormal sound of the proportional pressure reducing overflow valve can be greatly reduced or eliminated. Thirdly, through setting up the proportion coil, still can realize proportion decompression overflow, have the overflow function promptly, and then guarantee output pressure's stability.

The utility model discloses an another technical scheme lies in on above-mentioned basis, be close to in the valve barrel the one end of magnetron subassembly still is equipped with the spring holder, the one end of spring set up in on the spring holder, still be equipped with the retaining ring that is used for blockking the case on the spring holder.

The utility model discloses a another technical scheme lies in on above-mentioned basis, still be equipped with spacing seat in the valve sleeve, spacing seat with the spring holder sets up relatively, the spring is arranged in between spring holder and the spacing seat.

The utility model discloses an another technical scheme lies in on above-mentioned basis, spacing seat deviates from the one end of spring holder still is equipped with the cushion chamber, the damping hole with the cushion chamber intercommunication, when the case receives fluid to strike, fluid can get into through the damping hole the cushion chamber.

The utility model discloses a another technical scheme lies in on above-mentioned basis, the hydraulic fluid port including set up in the case deviates from the first hydraulic fluid port of the one end tip of magnet tube external member.

The utility model discloses a another technical scheme lies in on above-mentioned basis, the hydraulic fluid port still including set up in second hydraulic fluid port and third hydraulic fluid port on the valve sleeve wall, the third hydraulic fluid port set up in the second hydraulic fluid port with between the spacing seat.

The utility model discloses an another technical scheme lies in on above-mentioned basis, still be equipped with fourth hydraulic fluid port and fifth hydraulic fluid port on the case, when the case reciprocated, the fourth hydraulic fluid port can communicate with the third hydraulic fluid port, and the fifth hydraulic fluid port can communicate with the second hydraulic fluid port.

The utility model discloses a another technical scheme lies in on above-mentioned basis, the valve barrel periphery still is equipped with a plurality of sealing assembly who plays the sealed effect, sealing assembly includes a plurality of sealing washer.

Another technical scheme of the utility model lies in on above-mentioned basis, seal assembly including set up in the valve barrel is close to the first sealing member of magnetron subassembly one end set up in the second sealing member at valve barrel middle part, and set up in the third sealing member of the valve barrel other end.

On the other hand, the utility model also provides a hydraulic system, including the relief pressure valve, the relief pressure valve is as above arbitrary any proportion decompression overflow valve.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.

FIG. 1 is a schematic view of the internal structure of a proportional pressure relief valve of the present invention;

fig. 2 is a working principle diagram of the proportional pressure-reducing overflow valve of the present invention.

The corresponding relation of the reference signs is as follows:

1 valve sleeve 2 valve core 3 limiting seat

4 spring 5 spring seat 6 retainer ring

7 magnetic tube assembly 8 first seal 9 second seal

10 third sealing element 11 first oil port 12 buffer chamber

13 orifice 14, second port 15 and third port

16 fourth oil port 17 fifth oil port

Detailed Description

The present invention will be described in detail with reference to the drawings, and the description is illustrative and explanatory only and should not be construed as limiting the scope of the present invention in any way. Furthermore, those skilled in the art can combine features from the embodiments in this document and from different embodiments accordingly, based on the description in this document.

The embodiment of the utility model provides a as follows, please refer to the proportion decompression overflow valve that fig. 1 and fig. 2 show, concrete magnet tube subassembly 7, be equipped with removable proportion coil in the magnet tube subassembly 7, and set up in magnet tube subassembly 7 one end, valve barrel 1 of the lower extreme shown in the figure promptly, be equipped with the case 2 that can reciprocate in valve barrel 1 in the valve barrel, case 2 is close to the one end of magnet tube subassembly 7, the last pot head that shows in the figure promptly is equipped with spring 4, during the non-operating condition, case 2 is in the position of lower extreme under spring 4's effect, and when case 2 received the impact force of fluid, case 2 rebound, at this moment, case 2 can extrude spring 4, make spring 4 whole shrink. The valve sleeve 1 and the valve core 2 are also provided with a plurality of oil ports, and in addition, the valve core 2 is also provided with a plurality of damping holes 13 for buffering. The valve core 2 is close to one end of the magnet tube assembly 7, namely the area of the upper end is smaller than that of the lower end in the drawing. According to the proportional pressure reducing overflow valve with the structure, when the valve core 2 is impacted by oil, part of oil can flow into the buffer cavity 12 from the damping hole 13, so that the buffer effect is achieved, the working stability of the proportional pressure reducing overflow valve is guaranteed, and the working noise and abnormal sound of the proportional pressure reducing overflow valve can be greatly reduced or eliminated. Thirdly, through setting up the proportion coil, still can realize proportion decompression overflow, have the overflow function promptly, and then guarantee output pressure's stability.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, one end of the valve sleeve 1 close to the magnetic tube assembly 7, i.e. the upper end shown in the figure, is further provided with a spring seat 5, one end of the spring 4, i.e. the upper end shown in the figure, is disposed on the spring seat 5, the spring seat 5 is further provided with a retaining ring 6 for blocking the valve element 2, and when the valve element 2 moves to the upper end, the valve element is blocked and limited by the retaining ring 6.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the valve sleeve 1 is further provided with a limiting seat 3, the limiting seat 3 is disposed opposite to the spring seat 5, the limiting seat 3 is disposed at the lower end of the spring seat 5, and the upper end and the lower end of the spring 4 are disposed between the spring seat 5 and the limiting seat 3.

On the basis of the embodiment, the utility model discloses in another embodiment, as shown in FIG. 1, spacing seat 3 deviates from the one end of spring holder 5, and the lower extreme shown in the picture still is equipped with cushion chamber 12 promptly, damping hole 13 with cushion chamber 12 intercommunication, when case 2 receives fluid to strike, fluid can get into cushion chamber 12 through damping hole 13, and then plays cushioning effect, guarantees the stationarity of proportion decompression overflow valve work.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the oil port specifically includes a first oil port 11 disposed at one end of the valve core 2 deviating from the magnetic tube kit, i.e., the lower end shown in the figure.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the oil port further includes a second oil port 14 and a third oil port 15 disposed on the wall of the valve housing 1, and the third oil port 15 is disposed between the second oil port 14 and the limiting seat 3.

On the basis of the above embodiment, the utility model discloses in another embodiment, as shown in fig. 1, correspondingly, still be equipped with fourth oil port 16 and fifth oil port 17 on the case 2, when case 2 reciprocated, fourth oil port 16 can communicate with third oil port 15, and fifth oil port 17 can communicate with second oil port 14. More specifically, when the line pressure is too large, the valve core 2 moves upwards, at this time, the third oil port 15 is communicated with the third oil port 15, and meanwhile, the first oil port 11 is also communicated with the third oil port 15 and the fourth oil port 16, so that the oil flows out and overflows integrally, and the pressure stability is maintained.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the periphery of the valve sleeve 1 is further provided with a plurality of sealing assemblies for sealing, each sealing assembly includes one or a plurality of sealing rings, each sealing ring can be specifically an O-shaped sealing ring, and the material can be any possible material such as rubber.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, for the sealing assembly, the sealing assembly specifically further includes a first sealing assembly disposed at one end of the valve housing 1 close to the magnetic tube assembly 7, i.e., the upper end shown in the figure, a second sealing member 9 disposed at the middle part of the valve housing 1, and a third sealing member 10 disposed at the other end of the valve housing 1, i.e., close to one end of the first oil port 11.

In the working process, after pressure oil flows from the second oil port 14 to the first oil port 11, the pressure of the first oil port 11 enters the buffer cavity 12 through the damping hole 13, the pressure of the buffer cavity 12 is consistent with the pressure of the port 1, the stress area of the valve core is only related to D1 and is unrelated to D2, when the proportional pressure reducing valve is manufactured, the force generated by the coil is only related to the size and the area of D1 and is related to the pressure of the port 1, the thrust of the proportional coil F = the pressure of the port D1 in the area 1, the flow of the proportional pressure reducing overflow valve of the structure is only related to the diameter of the valve core D2 and an inner hole in the valve core and is unrelated to D1, and the oil passing capacity is not easily influenced by the thrust limit of the proportional coil.

The buffer cavity 12 is filled with high-pressure oil, the high-pressure oil is used for buffering, the valve core is balanced (Tomas and Kawasaki structures are all buffered by return oil, in the pressure reduction-overflow process, the pulsation frequency of the valve core 2 is high, the valve core 2 is easy to wear and block, the high-frequency pulsation of the valve core in the pressure reduction-overflow process is reduced, and the quality problems of abnormal sound, valve blocking and the like are solved. The high-pressure balance buffer structure can meet the condition that the oil inlet pressure of the 2 ports is within 350Bar under high pressure, and can ensure that the 1 port stably outputs corresponding proportional pressure.

According to the proportional pressure reducing overflow valve with the structure, as mentioned above, when the valve core 2 is impacted by oil, part of the oil can flow into the buffer cavity 12 from the damping hole 13, so that the buffer effect is achieved, the working stability of the proportional pressure reducing overflow valve is ensured, and the working noise and abnormal sound of the proportional pressure reducing overflow valve can be greatly reduced or eliminated. Thirdly, through setting up the proportion coil, still can realize proportion decompression overflow, have the overflow function promptly, and then guarantee output pressure's stability.

Furthermore, the utility model also provides a hydraulic system, including the relief pressure valve, the relief pressure valve is as above arbitrary the proportion decompression overflow valve. More specifically, as shown in fig. 2, the proportional pressure reducing relief valve is a two-position two-way solenoid valve, and the port a is a working port and corresponds to the first oil port 11 in fig. 1; the port P is an oil inlet and corresponds to the second oil port 14 in fig. 1; the port T is an oil return port, and corresponds to the third oil port 15 in fig. 1.

The hydraulic system with the structure has the advantages of the proportional pressure reducing and overflowing valve correspondingly.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A proportional pressure-reducing overflow valve is characterized by comprising a magnetic tube assembly and a valve sleeve arranged at one end of the magnetic tube assembly, wherein a replaceable proportional coil is arranged in the magnetic tube assembly, a valve core capable of moving back and forth in the valve sleeve is arranged in the valve sleeve, a spring is sleeved at one end, close to the magnetic tube assembly, of the valve core, and the spring can be squeezed when the valve core moves;

the valve sleeve and the valve core are also provided with a plurality of oil ports, and the valve core is also provided with a plurality of damping holes for buffering;

the area of one end of the valve core close to the magnetic pipe assembly is smaller than that of the other end of the valve core.

2. The proportional pressure reducing overflow valve of claim 1, wherein a spring seat is further disposed at an end of the valve sleeve close to the magnetic pipe assembly, one end of the spring is disposed on the spring seat, and a retainer ring for blocking the valve core is further disposed on the spring seat.

3. The proportional pressure reducing overflow valve of claim 2, wherein a limiting seat is further disposed in the valve sleeve, the limiting seat is disposed opposite to the spring seat, and the spring is disposed between the spring seat and the limiting seat.

4. The proportional pressure reducing overflow valve of claim 3, wherein a buffer cavity is further formed in one end, away from the spring seat, of the limiting seat, the damping hole is communicated with the buffer cavity, and when the valve core is impacted by oil, the oil can enter the buffer cavity through the damping hole.

5. The proportional pressure reducing overflow valve of claim 4, wherein the oil port comprises a first oil port disposed at an end of the valve core facing away from the magnet tube assembly.

6. The proportional pressure relief valve of claim 5, wherein the oil ports further comprise a second oil port and a third oil port disposed on the valve sleeve wall, and the third oil port is disposed between the second oil port and the limiting seat.

7. The proportional pressure reducing overflow valve of claim 6, wherein the valve core is further provided with a fourth oil port and a fifth oil port, and when the valve core moves up and down, the fourth oil port can be communicated with the third oil port, and the fifth oil port can be communicated with the second oil port.

8. The proportional pressure reducing overflow valve of claim 7, wherein the valve housing is further provided at its periphery with a plurality of sealing assemblies for sealing, and the sealing assemblies comprise a plurality of sealing rings.

9. The proportional pressure reducing relief valve of claim 8 wherein said sealing assembly includes a first sealing member disposed at one end of said valve housing proximate said magnet tube assembly, a second sealing member disposed at a central portion of said valve housing, and a third sealing member disposed at an opposite end of said valve housing.

10. A hydraulic system comprising a pressure reducing valve, wherein the pressure reducing valve is a proportional pressure reducing relief valve as defined in any one of claims 1 to 9.