CN217582658U - Novel structure of valve group - Google Patents

Abstract

The application discloses a novel structure of a valve group, which comprises a valve plate, a first check valve, a second check valve, a first pressure regulating valve, a second pressure regulating valve, an overflow valve and a third check valve, wherein the first check valve and the second check valve are arranged on a second surface of the valve plate; an oil inlet of the first check valve is communicated with the P2 oil port, an oil inlet of the second check valve is communicated with the P1 oil port, oil outlets of the first check valve and the second check valve are converged and then communicated with an oil inlet of the overflow valve and an oil inlet of the third check valve respectively, and the first pressure regulating valve and the second pressure regulating valve are arranged behind an oil outlet of the overflow valve and an oil outlet of the third check valve. The novel structure of above-mentioned valves a plurality of valves set up on the different sides of valve plate, can effectively utilize the cubical space, and the distance between the valve of guaranteeing to be linked together is shortest to the spatial arrangement who realizes a plurality of valves is reasonable, thereby can reduce the volume of valves, improves the degree that the valves integrated, makes valves occupation space littleer.

Description

Novel structure of valve group

Technical Field

The application relates to the technical field of hydraulic valve banks, in particular to a novel structure of a valve bank.

Background

Plug valves and gate valves of traditional oilfield fracturing well sites are manually controlled, and due to the fact that the highest pressure inside pipelines can reach over 140MPa, accidents frequently occur during operation of personnel. Along with the improvement of the safety requirement of oil field fracturing construction, the hydraulic valve control system is more and more applied to each oil field site. In recent years, hydraulic valve control systems are rapidly developed, more and more functions are provided, and the structure is more and more compact. In order to ensure the stability of the working state of the hydraulic valve control system, a plurality of valves are required to be added in the valve group serving as a core element for cooperative operation, the larger the number of the valves is, the larger the volume of the valve group is, and the larger the occupied space of the valve group is, so that the difficulty is brought to the design of the control system.

The problem that current hydraulic valve control system's valves exist is, first, often uses tubular valve and plate valve combination, and the pipeline is many, and occupation space is big, is unfavorable for arranging. Secondly, although the conventionally used electromagnetic ball valve has good sealing performance, the maximum working flow is small and generally less than or equal to 20L/min, and when the required flow of the system is more than 20L/min, the requirements cannot be met, so that the problems of throttling, pressure loss, heating and the like can occur. Thirdly, the rear section of the conventional valve group is directly connected with a P port of a reversing valve for controlling the opening and closing of the hydraulic valve, and pressure oil can slowly leak from the middle position and enter the hydraulic valve due to the structural problem of a slide valve of the reversing valve, so that the hydraulic valve malfunctions.

Therefore, how to reduce the size of the valve group, meet the requirement of large flow rate use, and prevent the malfunction of the hydraulic valve is a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a purpose provides a valves novel structure, a plurality of valves of this valves set up on the different sides of valve plate, can effectively utilize the cubical space, and the distance between the valve of guaranteeing to be linked together is shortest to the spatial arrangement who realizes a plurality of valves is reasonable, thereby can reduce the volume of valves, improves the degree that the valves integrated, makes valves occupation space littleer.

In order to achieve the above object, the present application provides a novel structure of a valve set, including a valve plate having a first surface, a second surface, a third surface and a fourth surface which are adjacent to each other, a first check valve and a second check valve disposed on the second surface, a first pressure regulating valve, a second pressure regulating valve and an overflow valve disposed on the third surface, and a third check valve disposed on the fourth surface;

the oil inlet of the first check valve is communicated with the P2 oil port, the oil inlet of the second check valve is communicated with the P1 oil port, the oil outlets of the first check valve and the second check valve are converged and then respectively communicated with the oil inlet of the overflow valve and the oil inlet of the third check valve, and the first pressure regulating valve and the second pressure regulating valve are arranged behind the oil outlet of the overflow valve and the oil outlet of the third check valve.

In some embodiments, the novel valve group structure further includes a control valve group disposed after the oil outlet of the overflow valve and the oil outlet of the third check valve and before the first pressure regulating valve and the second pressure regulating valve.

In some embodiments, the pilot valve set is a pilot check valve set provided with a second pilot check valve and a first electromagnetic ball valve, and the second pilot check valve is disposed on the third face, and the first electromagnetic ball valve is disposed on the first face;

an oil inlet of the first electromagnetic ball valve is communicated with an oil outlet of the third check valve, an oil return port of the first electromagnetic ball valve is communicated with an oil outlet of the overflow valve, a working oil port of the first electromagnetic ball valve is communicated with a control oil port of the second hydraulic control check valve, a first oil port of the second hydraulic control check valve is communicated with an oil outlet of the overflow valve, and a second oil port of the second hydraulic control check valve is communicated with an oil outlet of the third check valve.

In some embodiments, the pilot-controlled check valve set is further provided with a first pilot-controlled check valve and a second electromagnetic ball valve, the first pilot-controlled check valve is arranged on the third surface, and the second electromagnetic ball valve is arranged on the first surface;

an oil inlet of the second electromagnetic ball valve is communicated with an oil outlet of the third check valve, an oil return port of the second electromagnetic ball valve is communicated with an oil outlet of the overflow valve, a working oil port of the second electromagnetic ball valve is communicated with a control oil port of the first hydraulic control check valve, a first oil port of the first hydraulic control check valve is communicated with the first pressure regulating valve and the second pressure regulating valve, and a second oil port of the first hydraulic control check valve is communicated with an oil outlet of the third check valve.

In some embodiments, the novel structure of the valve group further comprises one or more first positioning members, and the first electromagnetic ball valve is detachably connected through the first positioning members.

In some embodiments, the novel structure of the valve group further comprises one or more second positioning pieces, and the second electromagnetic ball valve is detachably connected through the second positioning pieces.

In some embodiments, the second face is provided with two threaded through holes, the first one-way valve and the second one-way valve being threaded to the second face;

the third surface is provided with five through holes with threads, and the first pressure regulating valve, the second pressure regulating valve, the first hydraulic control one-way valve, the second hydraulic control one-way valve and the overflow valve are in threaded connection with the third surface;

the fourth face is provided with a through hole with threads, and the third one-way valve is in threaded connection with the fourth face.

In some embodiments, the inner walls of the P1 oil port and the P2 oil port are provided with threads for connecting an oil inlet pipeline.

In some embodiments, an M2 oil port, a P3 oil port, an M7 oil port, and an M3 oil port are disposed between the third check valve and the oil inlet of the first electromagnetic ball valve, between the second oil port of the first hydraulic control check valve, and between the second oil port of the second hydraulic control check valve, and threads are disposed on inner walls of the M2 oil port, the P3 oil port, the M7 oil port, and the M3 oil port for connecting an oil inlet pipeline or a pressure measuring pipeline.

In some embodiments, the valve plate is provided with a T2 oil port and a T1 oil port, and the T2 oil port and the inner wall of the T1 oil port are provided with threads for connecting an oil return pipeline, and the T2 oil port and the inner wall of the T1 oil port are communicated with an oil outlet of the overflow valve, an oil return port of the first electromagnetic ball valve, a first oil port of the second hydraulic control one-way valve, an oil return port of the second electromagnetic ball valve, an oil return port of the first pressure regulating valve and an oil return port of the second pressure regulating valve.

In some embodiments, an M4 oil port and an a oil port are arranged behind the first pressure regulating valve, an M6 oil port and a B oil port are arranged behind the second pressure regulating valve, and threads are arranged on inner walls of the M4 oil port, the a oil port and the M6 oil port and the B oil port for connecting a working pipeline or a pressure measuring pipeline.

For above-mentioned background art, the novel structure of valves that this application provided includes valve plate, first check valve, second check valve, first air-vent valve, second air-vent valve, overflow valve and third check valve. The valve plate has two liang of adjacent first face, second face, third face and fourth face. The first check valve and the second check valve are arranged on the second face of the valve plate, the first pressure regulating valve, the second pressure regulating valve and the overflow valve are arranged on the third face of the valve plate, and the third check valve is arranged on the fourth face of the valve plate. An oil inlet of the first check valve is communicated with the P2 oil port, an oil inlet of the second check valve is communicated with the P1 oil port, oil outlets of the first check valve and the second check valve are converged and then communicated with an oil inlet of the overflow valve and an oil inlet of the third check valve respectively, and the first pressure regulating valve and the second pressure regulating valve are arranged behind an oil outlet of the overflow valve and an oil outlet of the third check valve.

The novel structure of this valves a plurality of valves set up on the different sides of valve plate, can effectively utilize the cubical space, and the distance between the valve of guaranteeing to be linked together is shortest to the spatial arrangement who realizes a plurality of valves is reasonable, thereby can reduce the volume of valves, improves the degree that the valves integrated, makes valves occupation space littleer.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a first structural schematic diagram of a novel valve block structure provided in an embodiment of the present application;

fig. 2 is a structural schematic diagram ii of a novel valve block structure provided in the embodiment of the present application;

fig. 3 is a hydraulic schematic diagram of a novel structure of a valve group provided in an embodiment of the present application.

Wherein:

1-valve plate, 2-first pressure regulating valve, 3-second pressure regulating valve, 4-first pilot operated check valve, 5-second pilot operated check valve, 6-overflow valve, 7-first check valve, 8-second check valve, 9-first electromagnetic ball valve, 10-second electromagnetic ball valve, 11-third check valve, 12-first positioning piece, 13-second positioning piece, 101-first surface, 102-second surface, 103-third surface, 104-fourth surface.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to enable those skilled in the art to better understand the scheme of the present application, the present application will be described in further detail with reference to the accompanying drawings and the detailed description.

Please refer to fig. 1 to fig. 3, wherein fig. 1 is a first structural diagram of a novel structure of a valve assembly provided in the embodiment of the present application, fig. 2 is a second structural diagram of the novel structure of the valve assembly provided in the embodiment of the present application, and fig. 3 is a hydraulic schematic diagram of the novel structure of the valve assembly provided in the embodiment of the present application.

In a first specific embodiment, the present application provides a novel structure of a valve set, which mainly includes a valve plate 1, a first pressure regulating valve 2, a second pressure regulating valve 3, an overflow valve 6, a first check valve 7 and a second check valve 8, an oil inlet of the first check valve 7 is communicated with a P2 oil port, an oil inlet of the second check valve 8 is communicated with a P1 oil port, oil outlets of the first check valve 7 and the second check valve 8 converge and then are respectively communicated with an oil inlet of the overflow valve 6 and an oil inlet of a third check valve 11, and the first pressure regulating valve 2 and the second pressure regulating valve 3 are located behind an oil outlet of the overflow valve 6 and an oil outlet of the third check valve 11.

In the present embodiment, the valve plate 1 has the first face 101, the second face 102, the third face 103, and the fourth face 104 adjacent to each other in pairs. The first check valve 7 and the second check valve 8 are provided on the second surface 102 of the valve plate 1, the first pressure regulating valve 2, the second pressure regulating valve 3, and the relief valve 6 are provided on the third surface 103 of the valve plate 1, and the third check valve 11 is provided on the fourth surface 104 of the valve plate 1.

The novel structure of this valves a plurality of valves set up on the different sides of valve plate 1, can effectively utilize the cubical space, and the distance between the valve of guaranteeing to be linked together is shortest to the spatial arrangement who realizes a plurality of valves is reasonable, thereby can reduce the volume of valves, improves the degree that the valves integrated, makes valves occupation space littleer.

It should be noted that, the novel structure of this application valves especially indicates a valves of oil field fracturing construction hydraulic valve control system.

In some embodiments, the novel structure of the valve group further comprises a control valve group which is arranged behind the oil outlet of the overflow valve 6 and the oil outlet of the third check valve 11 and in front of the first pressure regulating valve 2 and the second pressure regulating valve 3.

It should be noted that the form of the pilot valve group is not exclusive, and a pilot check valve group of a pilot check valve can be controlled by an electromagnetic ball valve, or an electromagnetic check valve with a plate structure can be used to implement the same function, which also belongs to the description scope of the embodiment.

Illustratively, the pilot valve set is a pilot check valve set.

In some embodiments, the hydraulic control check valve group is provided with a second hydraulic control check valve 5 and a first electromagnetic ball valve 9, an oil inlet of the first electromagnetic ball valve 9 is communicated with an oil outlet of a third check valve 11, an oil return port of the first electromagnetic ball valve 9 is communicated with an oil outlet of an overflow valve 6, a working oil port of the first electromagnetic ball valve 9 is communicated with a control oil port of the second hydraulic control check valve 5, a first oil port of the second hydraulic control check valve 5 is communicated with an oil outlet of the overflow valve 6, and a second oil port of the second hydraulic control check valve 5 is communicated with an oil outlet of the third check valve 11.

In this embodiment, the second hydraulic check valve 5 is disposed on the third surface 103, and the first electromagnetic ball valve 9 is disposed on the first surface 101.

In some embodiments, the pilot-controlled check valve group is further provided with a first pilot-controlled check valve 4 and a second electromagnetic ball valve 10, an oil inlet of the second electromagnetic ball valve 10 is communicated with an oil outlet of a third check valve 11, an oil return port of the second electromagnetic ball valve 10 is communicated with an oil outlet of an overflow valve 6, a working oil port of the second electromagnetic ball valve 10 is communicated with a control oil port of the first pilot-controlled check valve 4, a first oil port of the first pilot-controlled check valve 4 is communicated with the first pressure regulating valve 2 and the second pressure regulating valve 3, and a second oil port of the first pilot-controlled check valve 4 is communicated with an oil outlet of the third check valve 11.

In this embodiment, the first pilot operated check valve 4 is disposed on the third surface 103, and the second electromagnetic ball valve 10 is disposed on the first surface 101.

The valve set comprises a valve plate 1, and a first pressure regulating valve 2, a second pressure regulating valve 3, a first hydraulic control one-way valve 4, a second hydraulic control one-way valve 5, an overflow valve 6, a first one-way valve 7, a second one-way valve 8, a first electromagnetic ball valve 9, a second electromagnetic ball valve 10 and a third one-way valve 11 which are arranged on the valve plate 1. Wherein the first electromagnetic ball valve 9 is closer to the second surface 102 than the second electromagnetic ball valve.

It should be noted that the valve bank has high integration level, small volume and small occupied space, and is convenient to arrange in a system.

In some embodiments, the novel structure of the valve group further comprises one or more first positioning members 12, and the first electromagnetic ball valve 9 is detachably connected through the first positioning members 12.

Similarly, the novel structure of the valve group further comprises one or more second positioning parts 13, and the second electromagnetic ball valve 10 is detachably connected through the second positioning part 13.

In this embodiment, the positioning members are provided in a plurality of numbers so as to ensure that the first electromagnetic ball valve 9 and the second electromagnetic ball valve 10 are firmly connected with the valve plate 1. The detachable connection of the positioning piece can reduce the maintenance difficulty of the valve plate 1, the first electromagnetic ball valve 9 and the second electromagnetic ball valve 10, the maintenance efficiency is improved, and the valve body on the valve group is favorably recycled.

In some embodiments, the second face 102 is provided with two threaded through holes, and the first check valve 7 and the second check valve 8 are threaded to the second face 102.

Similarly, the third surface 103 is provided with five through holes with threads, and the first pressure regulating valve 2, the second pressure regulating valve 3, the first pilot operated check valve 4, the second pilot operated check valve 5 and the relief valve 6 are connected to the third surface 103 in a threaded manner;

similarly, the fourth face 104 is provided with a threaded through hole, and the third check valve 11 is screwed to the fourth face 104.

In this embodiment, the threaded connection facilitates the installation of the first pressure regulating valve 2, the second pressure regulating valve 3, the first pilot operated check valve 4, the second pilot operated check valve 5, the overflow valve 6, the first check valve 7, the second check valve 8 and the third check valve 11. The threaded connection can effectively ensure the firmness of the connection of the first pressure regulating valve 2, the second pressure regulating valve 3, the first hydraulic control one-way valve 4, the second hydraulic control one-way valve 5, the overflow valve 6, the first one-way valve 7, the second one-way valve 8 and the third one-way valve 11 with the valve plate 1.

Besides, in some embodiments, the inner walls of the P1 oil port and the P2 oil port are provided with threads for connecting an oil inlet pipeline.

In some embodiments, an M2 oil port, a P3 oil port, an M7 oil port, and an M3 oil port are disposed between the third check valve 11 and the oil inlet of the first electromagnetic ball valve 9, the second oil port of the first hydraulic control check valve 4, and the second oil port of the second hydraulic control check valve 5.

In this embodiment, the inner walls of the M2 port, the P3 port, the M7 port, and the M3 port are provided with threads, and may be connected to an oil inlet pipeline or a pressure measurement pipeline, so as to monitor the oil pressure in front of the first pressure regulating valve 2 and the second pressure regulating valve 3, and the oil pressures measured by the M2 port, the P3 port, the M7 port, and the M3 port can characterize the oil pressure of the control system to a certain extent.

In some embodiments, the first pressure regulating valve 2 is followed by an M4 port, an a port, and the second pressure regulating valve 3 is followed by an M6 port, a B port.

In this embodiment, the inner walls of the M4 oil port, the a oil port, the M6 oil port and the B oil port are provided with threads, and can be connected to a working pipeline or a pressure measuring pipeline to monitor the oil pressure after the first pressure regulating valve 2 and the second pressure regulating valve 3, respectively, and the oil pressure measured by the M4 oil port, the a oil port, the M6 oil port and the B oil port can represent the working oil pressure of the control system to a certain extent.

In this embodiment, the valve plate 1 is provided with a T2 oil port and a T1 oil port, and is communicated with an oil outlet of the overflow valve 6, an oil return port of the first electromagnetic ball valve 9, a first oil port of the second hydraulic control check valve 5, an oil return port of the second electromagnetic ball valve 10, an oil return port of the first pressure regulating valve 2, and an oil return port of the second pressure regulating valve 3, and inner walls of the T2 oil port and the T1 oil port are provided with threads for connecting an oil return pipeline.

In a specific process description, an oil inlet of the first check valve 7 is communicated with the P2 oil port, an oil inlet of the second check valve 8 is communicated with the P1 oil port, oil outlets of the first check valve 7 and the second check valve 8 are converged and then communicated with an oil inlet of the third check valve 11, and an oil outlet of the third check valve 11 is respectively communicated with the P port (oil inlet) of the first electromagnetic ball valve 9, a non-return side oil port (second oil port) of the first hydraulic control check valve 4, a non-return side oil port (second oil port) of the second hydraulic control check valve 5 and the P port (oil inlet) of the second electromagnetic ball valve 10. An overflow valve 6 is arranged behind the first check valve 7 and the second check valve 8 and in front of the third check valve 11, an oil inlet of the overflow valve 6 is communicated with oil outlets of the first check valve 7 and the second check valve 8 and an oil inlet of the third check valve 11, an oil outlet of the overflow valve 6 is communicated with main return oil, and when the internal pressure of the valve block exceeds a set value of the overflow valve 6, the overflow valve 6 is communicated with the main return oil to prevent overpressure in the valve block. And 2 pressure regulating valves are arranged behind the first hydraulic control one-way valve 4, namely a first pressure regulating valve 2 and a second pressure regulating valve 3 respectively, and hydraulic oil with different pressures can be output according to requirements. An A port (a working oil port) of the first electromagnetic ball valve 9 is communicated with a control port (a control oil port) of the second hydraulic control one-way valve 5, an oil outlet of the second hydraulic control one-way valve 5 is communicated with a valve block main oil return channel, and the closing and the conduction of the second hydraulic control one-way valve 5 can be controlled by switching the position of a valve core of the first electromagnetic ball valve 9, so that the pressure of the control system is relieved. The port A of the second electromagnetic ball valve 10 is communicated with the control port of the first hydraulic control one-way valve 4, the oil outlet of the first hydraulic control one-way valve 4 enters the first pressure regulating valve 2 and the second pressure regulating valve 3, the oil outlets of the first pressure regulating valve 2 and the second pressure regulating valve 3 are respectively communicated with the output port A and the output port B, and the closing and the conduction of the first hydraulic control one-way valve 4 can be controlled by switching the valve core position of the second electromagnetic ball valve 10, so that the on-off of pressure oil output by the valve block is controlled, and the misoperation of the hydraulic valve is prevented. Through the normally closed pilot operated check valve group of series connection (including pilot operated check valve and electromagnetism ball valve, electromagnetism ball valve control pilot operated check valve) in the valves, can realize pressure oil shutoff before the switching-over valve, prevent the hydraulic valve malfunction, only when the hydraulic valve need work, just open the pilot operated check valve through the control of electromagnetism ball valve.

It should be noted that the three oil inlets of P1, P2, P3 are reserved to this novel structure of valves, and P1, P2 mouth are located the valves foremost for insert the hydraulic pump, built-in check valve, it is small than traditional tubular check valve, prevent that the pressure oil in the system from flowing back the hydraulic pump in the reverse direction, thereby damage the hydraulic pump. The P3 port is located between the third one-way valve 11 and the first hydraulic control one-way valve 4 and used for being connected with the energy accumulator, the third one-way valve 11 can prevent pressure oil in the energy accumulator from slowly leaking through the overflow valve 6, and the first hydraulic control one-way valve 4 is used for controlling the on-off of the pressure oil in the P1 and P2 hydraulic pumps and the P3 energy accumulator.

The first electromagnetic ball valve 9 in the novel structure of the valve group is used for relieving the system pressure, and the second electromagnetic ball valve 10 is used for controlling the on-off of a main oil way and is used as a protection valve for preventing the rear-end misoperation. The sealing performance of the electromagnetic ball valve when the electromagnetic ball valve is closed is better than that of an electromagnetic reversing valve of a traditional sliding valve structure, but the allowable flow rate is small, the novel structure of the valve group is not directly used for oil circuit control, but adopts a mode that the electromagnetic ball valve is used as a pilot valve to control a large-drift-diameter hydraulic control one-way valve (a first electromagnetic ball valve 9 is in a normally closed type, an oil inlet is communicated with a system main oil inlet, an oil outlet is communicated with a control port of a second hydraulic control one-way valve 5, a non-return side oil port of the second hydraulic control one-way valve 5 is communicated with the system main oil inlet, the other oil port is communicated with the system main oil inlet when the first electromagnetic ball valve 9 is not electrified, the second hydraulic control one-way valve 5 is closed, the system is not decompressed, a second electromagnetic ball valve 10 is in a normally closed type, an oil inlet is communicated with the system main oil inlet, an oil outlet is communicated with a control port of the first hydraulic control one-way valve 4, a non-return side oil port of the first hydraulic control one-way valve 4 is communicated with the system main oil inlet and is connected in series in the system main oil inlet, the other oil port is communicated with a first pressure regulating valve 2 and a second pressure regulating valve 3, when the second electromagnetic ball valve 10 is not electrified, the second electromagnetic ball valve is closed, and the oil circuit is closed. The problem that the flow of the electromagnetic ball valve is small and the system requirement is not met is solved.

The first pilot operated check valve 4 is arranged between the port P3 and the pressure regulating valve, and when the port P3 is connected with the accumulator, the first pilot operated check valve 4 is closed, so that pressure oil in the accumulator can be prevented from leaking through the first pressure regulating valve 2 and the second pressure regulating valve 3.

2 way air-vent valve mounting holes are reserved to this novel structure of valves, and 1 or 2 air-vent valves of mountable according to the condition, when installing 1 air-vent valve, another can use the shutoff of jack end cap.

It should be noted that many of the components mentioned in this application are either common standard components or components known to those skilled in the art, and their structure and principle are known to those skilled in the art through technical manuals or through routine experimentation.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The above has described in detail the novel structure of the valve group that this application provided. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims (11)

1. The novel structure of the valve group is characterized by comprising a valve plate (1) with a first surface (101), a second surface (102), a third surface (103) and a fourth surface (104) which are adjacent in pairs, a first check valve (7) and a second check valve (8) which are arranged on the second surface (102), a first pressure regulating valve (2), a second pressure regulating valve (3) and an overflow valve (6) which are arranged on the third surface (103), and a third check valve (11) which is arranged on the fourth surface (104);

an oil inlet of the first check valve (7) is communicated with a P2 oil port, an oil inlet of the second check valve (8) is communicated with a P1 oil port, oil outlets of the first check valve (7) and the second check valve (8) are converged and then respectively communicated with an oil inlet of the overflow valve (6) and an oil inlet of the third check valve (11), and the first pressure regulating valve (2) and the second pressure regulating valve (3) are arranged behind an oil outlet of the overflow valve (6) and an oil outlet of the third check valve (11).

2. The novel structure of valve group according to claim 1, characterized by further comprising a control valve group arranged after the oil outlet of the overflow valve (6) and the oil outlet of the third check valve (11) and before the first pressure regulating valve (2) and the second pressure regulating valve (3).

3. The new structure of valve group according to claim 2, characterized in that said valve group is a pilot operated check valve group provided with a second pilot operated check valve (5) and a first electromagnetic ball valve (9), and said second pilot operated check valve (5) is provided on said third face (103), and said first electromagnetic ball valve (9) is provided on said first face (101);

the oil inlet of the first electromagnetic ball valve (9) is communicated with the oil outlet of the third check valve (11), the oil return port of the first electromagnetic ball valve (9) is communicated with the oil outlet of the overflow valve (6), the working oil port of the first electromagnetic ball valve (9) is communicated with the control oil port of the second hydraulic control check valve (5), the first oil port of the second hydraulic control check valve (5) is communicated with the oil outlet of the overflow valve (6), and the second oil port of the second hydraulic control check valve (5) is communicated with the oil outlet of the third check valve (11).

4. A novel structure of valve group according to claim 3, characterized in that said pilot operated check valve group is further provided with a first pilot operated check valve (4) and a second electromagnetic ball valve (10), and said first pilot operated check valve (4) is arranged on said third face (103), and said second electromagnetic ball valve (10) is arranged on said first face (101);

the oil inlet of the second electromagnetic ball valve (10) is communicated with the oil outlet of the third one-way valve (11), the oil return port of the second electromagnetic ball valve (10) is communicated with the oil outlet of the overflow valve (6), the working oil port of the second electromagnetic ball valve (10) is communicated with the control oil port of the first hydraulic control one-way valve (4), the first oil port of the first hydraulic control one-way valve (4) is communicated with the first pressure regulating valve (2) and the second pressure regulating valve (3), and the second oil port of the first hydraulic control one-way valve (4) is communicated with the oil outlet of the third one-way valve (11).

5. The new valve group structure according to claim 4, characterized in that it also comprises a first positioning member (12), the number of said first positioning member (12) is one or more, said first electromagnetic ball valve (9) is detachably connected through said first positioning member (12).

6. A novel structure of a valve group according to claim 4, characterized in that it further comprises a second positioning member (13), the number of the second positioning member (13) is one or more, and the second electromagnetic ball valve (10) is detachably connected through the second positioning member (13).

7. The new structure of valve group according to claim 4, characterized in that said second face (102) is provided with two threaded through holes, said first check valve (7) and said second check valve (8) being screwed to said second face (102);

the third surface (103) is provided with five through holes with threads, and the first pressure regulating valve (2), the second pressure regulating valve (3), the first hydraulic control one-way valve (4), the second hydraulic control one-way valve (5) and the overflow valve (6) are in threaded connection with the third surface (103);

the fourth surface (104) is provided with a through hole with threads, and the third one-way valve (11) is in threaded connection with the fourth surface (104).

8. The novel structure of the valve group as claimed in claim 4, wherein the inner walls of the P1 oil port and the P2 oil port are provided with threads for connecting an oil inlet pipeline.

9. The novel structure of valve group according to claim 4, wherein an M2 oil port, a P3 oil port, an M7 oil port and an M3 oil port are arranged between the third check valve (11) and the oil inlet of the first electromagnetic ball valve (9), the second oil port of the first hydraulic control check valve (4) and the second oil port of the second hydraulic control check valve (5), and threads are arranged on the inner walls of the M2 oil port, the P3 oil port, the M7 oil port and the M3 oil port and used for connecting an oil inlet pipeline or a pressure measuring pipeline.

10. The novel structure of a valve group according to claim 4, wherein the valve plate (1) is provided with a T2 oil port and a T1 oil port, and the T2 oil port and the T1 oil port are communicated with an oil outlet of the overflow valve (6), an oil return port of the first electromagnetic ball valve (9), a first oil port of the second hydraulic control one-way valve (5), an oil return port of the second electromagnetic ball valve (10), an oil return port of the first pressure regulating valve (2) and an oil return port of the second pressure regulating valve (3), and inner walls of the T2 oil port and the T1 oil port are provided with threads for connecting an oil return pipeline or a pressure measuring pipeline.

11. The novel structure of a valve group according to claim 4, characterized in that an M4 oil port and an A oil port are arranged behind the first pressure regulating valve (2), an M6 oil port and a B oil port are arranged behind the second pressure regulating valve (3), and the M4 oil port, the A oil port, the M6 oil port and the B oil port are provided with threads on the inner walls thereof for connecting a working pipeline or a pressure measuring pipeline.

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