CN112524294B

CN112524294B - Multi-way valve

Info

Publication number: CN112524294B
Application number: CN202011172282.5A
Authority: CN
Inventors: 汤波; 方敏; 吴建磊; 叶建; 刘杰; 刘琥铖
Original assignee: Wuhan Marine Machinery Plant Co Ltd
Current assignee: Wuhan Marine Machinery Plant Co Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2022-04-29
Anticipated expiration: 2040-10-28
Also published as: CN112524294A

Abstract

The utility model provides a burst formula multiple unit valve belongs to hydraulic control technical field. The wafer type multi-way valve comprises a protection unit and a control unit; the protection unit comprises a protection valve body and a first overflow valve, a first oil inlet and a first oil outlet are formed in the protection valve body, the control unit comprises a control valve body, an overflow oil supplementing valve group and a valve core assembly, the control valve body is connected with the protection valve body, a second oil inlet and a second oil outlet are formed in the control valve body, the second oil inlet is communicated with the first oil inlet, the second oil outlet is communicated with the first oil outlet, the overflow oil supplementing valve group is connected with the control valve body, and the valve core assembly is located inside the control valve body. This openly through this burst formula multiple unit valve, the commonality that improves the multiple unit valve that can be great.

Description

Multi-way valve

Technical Field

The disclosure belongs to the technical field of hydraulic control, and particularly relates to a wafer type multi-way valve.

Background

The multi-way valve is a combination of reversing valves capable of controlling a plurality of hydraulic actuating mechanisms, and is a multifunctional integrated valve which takes more than two reversing valves as main bodies and integrates the reversing valves and an overflow valve into a whole.

In the related art, the multiway valve includes a valve body and a plurality of valve members, wherein the valve body is provided with a plurality of valve holes, and the plurality of valve members are mounted on the valve body through the valve holes. The valve body is generally integrally formed by casting.

However, when the multi-way valve is used, the valve body is integrally formed by casting, so that the multi-way valve is poor in universality, and the whole valve body is scrapped as long as one valve hole is unqualified in the machining process, so that the whole multi-way valve is scrapped, and the economic benefit is reduced.

Disclosure of Invention

The embodiment of the disclosure provides a multi-way valve in a split type, which can greatly improve the universality of the multi-way valve. The technical scheme is as follows:

the embodiment of the disclosure provides a wafer-type multi-way valve, which comprises a protection unit and a control unit;

the protection unit comprises a protection valve body and a first overflow valve, wherein the protection valve body is provided with a first oil inlet and a first oil outlet, the first oil inlet is communicated with the oil outlet of the load sensitive pump, the first oil outlet is used for being communicated with an oil tank, the first overflow valve is connected to the protection valve body, a first oil port of the first overflow valve is communicated with the first oil inlet, a second oil port of the first overflow valve is communicated with the first oil outlet, and a third oil port of the first overflow valve is communicated with a first oil port of the first overflow valve;

the control unit comprises a control valve body, an overflow oil supplementing valve group and a valve core assembly, the control valve body is connected with the protection valve body, a second oil inlet and a second oil outlet are formed in the control valve body, the second oil inlet is communicated with the first oil inlet, the second oil outlet is communicated with the first oil outlet, the overflow oil supplementing valve group is connected with the control valve body, and the valve core assembly is located inside the control valve body;

the first oil port of the valve core assembly is communicated with the second oil inlet, the second oil port and the third oil port of the valve core assembly are communicated with the second oil outlet, and the first working oil port and the second working oil port of the valve core assembly are communicated with an execution element;

the overflow oil supplementing valve group comprises a first overflow oil supplementing valve and a second overflow oil supplementing valve, a first oil port of the first overflow oil supplementing valve is communicated with a first working oil port of the valve core assembly, a second oil port of the first overflow oil supplementing valve is communicated with a second oil port of the valve core assembly, a control oil port of the first overflow oil supplementing valve is communicated with a first oil port of the first overflow oil supplementing valve, a first oil port of the second overflow oil supplementing valve is communicated with a second working oil port of the valve core assembly, a second oil port of the second overflow oil supplementing valve is communicated with a third oil port of the valve core assembly, and a control oil port of the second overflow oil supplementing valve is communicated with the first oil port of the second overflow oil supplementing valve.

In another implementation manner of the present disclosure, the protection valve body further has a first control oil port, and the first control oil port is used for being communicated with the control oil port of the load sensitive pump;

the control valve body is also provided with two second control oil ports, the two second control oil ports are communicated with the first control oil port, the fourth oil port of the valve core assembly is communicated with one of the second control oil ports, and the fifth oil port of the valve core assembly is communicated with the other second control oil port;

the protection unit further comprises a sequence valve, the sequence valve is connected to the top of the protection valve body and is spaced from the first overflow valve, a first oil port of the sequence valve is communicated with the first oil inlet, a second oil port of the sequence valve is communicated with the first oil outlet, a third oil port of the sequence valve is communicated with the first oil port of the sequence valve, and a spring cavity of the sequence valve is communicated with the first control oil port.

In another implementation manner of the present disclosure, the protection unit further includes a second overflow valve, the second overflow valve is connected to the top of the protection valve body, the second overflow valve is spaced from the sequence valve, a first oil port of the second overflow valve is communicated with the first control oil port, a second oil port of the second overflow valve is communicated with the first oil outlet, and a third oil port of the second overflow valve is communicated with the first oil port of the second overflow valve.

In another implementation manner of the present disclosure, the protection unit further includes a check throttle valve, the check throttle valve is connected to the top of the protection valve body, the check throttle valve is located between the second overflow valve and the sequence valve, a first oil port of the check throttle valve is communicated with the first control oil port, and a second oil port of the check throttle valve is communicated with the spring cavity of the sequence valve and the first oil port of the second overflow valve.

In another implementation manner of the present disclosure, the protection unit further includes a constant flow valve, the constant flow valve is connected to the side wall of the protection valve body, a first oil port of the constant flow valve is communicated with the first control oil port, and a second oil port of the constant flow valve is communicated with the oil tank.

In another implementation manner of the present disclosure, the protection valve body further has a plurality of positioning pins, the positioning pins are located on a side surface of the protection valve body facing the control valve body, and the positioning pins are inserted into the control valve body.

In another implementation manner of the present disclosure, the protection valve body further has a plurality of first sealing rings, the first sealing rings are respectively connected to the first oil inlet, the first oil outlet, and the first control oil port, and the first sealing rings are clamped between the control valve body and the protection valve body.

In another implementation manner of the present disclosure, the protection valve body further includes a plug, and the plug is plugged in the fabrication hole of the protection valve body.

In another implementation manner of the present disclosure, the plate-splitting type multi-way valve further includes an oil return valve body, the oil return valve body is connected to the control valve body, the oil return valve body is provided with an oil return port, and the oil return port is communicated with the second oil outlet.

In yet another implementation manner of the present disclosure, the oil return valve body further includes a second sealing ring, and the second sealing ring is interposed between the oil return valve body and the control valve body.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

when the multi-way valve provided by the embodiment of the disclosure is used for connection control of a plurality of execution elements, the multi-way valve comprises the protection unit and the control unit, and the protection unit comprises the protection valve body and the control unit comprises the control valve body, so that the first overflow valve, the first overflow oil supplementing valve and the second overflow oil supplementing valve can be respectively installed through the protection valve body and the control valve body, and the multi-way valve can be formed in a standardized and modularized manner according to requirements of different oil ways. Even if one of the valve members is scrapped or the valve body is scrapped in the machining process, the use of other valve members or valve bodies in the whole multi-way valve is not influenced, meanwhile, the damaged valve members or valve bodies in the later use process are convenient to replace, and the universality of the multi-way valve is improved.

And moreover, the highest working pressure of the oil inlet path can be controlled through the first overflow valve in the protection unit, so that the valve core assembly is protected when being reset, and the pressure of the valve core assembly can be quickly relieved. Moreover, two overflow oil supplementing valves are arranged in the control unit to be matched with the valve core assembly, so that the functions of overflow, oil supplementing and reversing can be integrated in one valve body.

According to the wafer-type multi-way valve provided by the embodiment of the disclosure, the protection unit and the control unit are wafer-type, so that modular combination can be performed through the protection unit and the control unit, the application range is wider, and the integration degree is higher.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a wafer-type multiway valve provided by an embodiment of the disclosure;

FIG. 2 is a front view of a protective valve body provided by an embodiment of the present disclosure;

FIG. 3 is a right side view of a protective valve body provided by an embodiment of the present disclosure;

FIG. 4 is a control schematic diagram of a multi-way valve provided by an embodiment of the present disclosure;

FIG. 5 is a left side view of a control valve body provided by an embodiment of the present disclosure;

FIG. 6 is an enlarged view at M of FIG. 4;

FIG. 7 is an enlarged view taken at N of FIG. 4;

FIG. 8 is a top view of a protective valve body provided by an embodiment of the present disclosure;

FIG. 9 is a rear view of a protective valve body provided by an embodiment of the present disclosure;

FIG. 10 is a cross-sectional view of a control valve body provided by an embodiment of the present disclosure;

fig. 11 is a left side view of an oil return valve body provided by an embodiment of the present disclosure;

fig. 12 is a top view of a return valve body provided by embodiments of the present disclosure.

The symbols in the drawings represent the following meanings:

1. a protection unit; 11. protecting the valve body; 111. a first oil inlet; 112. a first oil outlet; 113. a first control oil port; 114. positioning pins; 115. a first seal ring; 116. plugging by screwing;

12. a first overflow valve; 13. a sequence valve; 14. a second overflow valve; 15. a one-way throttle valve; 16. a constant flow valve;

2. a control unit; 21. a control valve body; 211. a second oil inlet; 212. a second oil outlet; 213. a second control oil port; 214. a control body; 2141. a first body; 2142. a second body; 215. a control end cap; 2150. an end cover oil inlet; 22. an overflow oil-supplementing valve bank; 221. a first overflow oil replenishing valve; 222. a second overflow oil replenishing valve; 23. a valve core assembly;

3. an oil return valve body; 31. an oil return port; 32. a second seal ring; 33. a communication channel;

100. an actuator; 101. a load-sensitive pump; 102. and an oil tank.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

The embodiment of the present disclosure provides a disk type multi-way valve, as shown in fig. 1, the disk type multi-way valve includes a protection unit 1 and a control unit 2.

Fig. 2 is a front view of a protection valve body provided in an embodiment of the present disclosure, and in conjunction with fig. 2, the protection unit 1 includes a protection valve body 11 and a first relief valve 12.

Fig. 3 is a right side view of the protection valve body provided by the embodiment of the disclosure, and in combination with fig. 3, the protection valve body 11 has a first oil inlet 111 and a first oil outlet 112. The first oil inlet 111 is communicated with an oil outlet P of the load sensing pump 101, the first oil outlet 112 is used for being communicated with the oil tank 102, and the first overflow valve 12 is connected to the protection valve body 11.

Fig. 4 is a control schematic diagram of a multi-way valve provided in the embodiment of the present disclosure, and with reference to fig. 4, a first oil port a of the first overflow valve 12 is communicated with the first oil inlet 111, a second oil port b of the first overflow valve 12 is communicated with the first oil outlet 112, and a third oil port c of the first overflow valve 12 is communicated with a first oil port a of the first overflow valve.

Fig. 5 is a left side view of the control valve body provided in the embodiment of the present disclosure, and with reference to fig. 5, the control unit 2 includes a control valve body 21, an overflow oil-supplementing valve group 22, and a valve core assembly 23, the control valve body 21 is connected to the protection valve body 11 (see fig. 1), the control valve body 21 has a second oil inlet 211 and a second oil outlet 212, the second oil inlet 211 is communicated with the first oil inlet 111, the second oil outlet 212 is communicated with the first oil outlet 112, the overflow oil-supplementing valve group 22 is connected to the control valve body 21, and the valve core assembly 23 is located inside the control valve body 21.

Fig. 6 is an enlarged view of a position M in fig. 4, and in combination with fig. 6, the first oil port a of the valve core assembly 23 is communicated with the second oil inlet 211, the second oil port B and the third oil port c of the valve core assembly 23 are communicated with the second oil outlet 212, and the first working oil port a and the second working oil port B of the valve core assembly 23 are used for being communicated with the actuator.

The overflow oil-replenishing valve group 22 includes a first overflow oil-replenishing valve 221 and a second overflow oil-replenishing valve 222, a first oil port a of the first overflow oil-replenishing valve 221 is communicated with a first working oil port a of the valve core assembly 23, a second oil port B of the first overflow oil-replenishing valve 221 is communicated with a second oil port B of the valve core assembly 23, a control oil port c of the first overflow oil-replenishing valve 221 is communicated with a first oil port a of the first overflow oil-replenishing valve 221, a first oil port a of the second overflow oil-replenishing valve 222 is communicated with a second working oil port B of the valve core assembly 23, a second oil port B of the second overflow oil-replenishing valve 222 is communicated with a third oil port c of the valve core assembly 23, and a control oil port c of the second overflow oil-replenishing valve 222 is communicated with a first oil port a of the second overflow oil-replenishing valve 222.

When the multi-way valve provided by the embodiment of the disclosure is used for connection control of a plurality of execution elements, the multi-way valve comprises a protection unit 1 and a control unit 2, the protection unit 1 comprises a protection valve body 11, and the control unit 2 comprises a control valve body 21, so that a first overflow valve 12, a first overflow oil supplementing valve 221 and a second overflow oil supplementing valve 222 can be respectively installed through the protection valve body 11 and the control valve body 21, and the multi-way valve can be formed in a standardized and modularized manner according to requirements of different oil ways. Even if one of the valve members is scrapped or the valve body is scrapped in the machining process, the use of other valve members or valve bodies in the whole multi-way valve is not influenced, meanwhile, the damaged valve members or valve bodies in the later use process are convenient to replace, and the universality of the multi-way valve is improved.

In addition, the first overflow valve 12 in the protection unit 1 can control the highest working pressure of the oil inlet path, so as to protect the valve core assembly 23 when the valve core assembly 23 is reset, and thus the valve core assembly 23 can be quickly decompressed. Moreover, two overflow oil-supplementing valves are arranged in the control unit 2 to be matched with the valve core assembly 23, so that the functions of overflow, oil supplementation and reversing can be integrated in one valve body.

According to the wafer-type multi-way valve provided by the embodiment of the disclosure, the protection unit 1 and the control unit 2 are wafer-type, so that modular combination can be performed through the protection unit 1 and the control unit 2, the application range is wider, and the integration degree is higher.

Referring to fig. 3 again, the protection valve body 11 further has a first control port 113 thereon, and the first control port 113 is used for communicating with the control port X of the load-sensitive pump 101.

Referring again to fig. 5, the control valve body 21 further has two second control oil ports 213, the two second control oil ports 213 are both communicated with the first control oil port 113, the fourth oil port d of the valve core assembly 23 is communicated with one of the second control oil ports 213, and the fifth oil port e of the valve core assembly 23 is communicated with the other second control oil port 213.

Fig. 7 is an enlarged view taken at N in fig. 4, and with reference to fig. 7, the protection unit 1 further includes a sequence valve 13, the sequence valve 13 is connected to the top of the protection valve body 11, and the sequence valve 13 is spaced apart from the first overflow valve 12, a first port a of the sequence valve 13 is communicated with the first oil inlet 111, a second port b of the sequence valve 13 is communicated with the first oil outlet 112, a third port c of the sequence valve 13 is communicated with the first port a thereof, and a spring chamber d of the sequence valve 13 is communicated with the first control port 113.

In the above implementation, the sequence valve 13 is used to limit the pressure difference between the oil inlet line in the split type multi-way valve and the load-sensitive oil line of the load-sensitive pump. When the chip multi-way valve works normally, the pressure difference between the two oil ways is less than or equal to 2.5MPa, if the pressure difference is abnormal due to instantaneous pressure impact or other reasons, the sequence valve 13 is opened to release the pressure, and the safety protection is realized.

Fig. 8 is a top view of the protection valve body provided in the embodiment of the present disclosure, and in conjunction with fig. 8, for example, the protection unit 1 further includes a second overflow valve 14, the second overflow valve 14 is connected to the top of the protection valve body 11, and the second overflow valve 14 is spaced from the sequence valve 13.

Referring to fig. 7 again, the first port a of the second overflow valve 14 is communicated with the first control port 113, the second port b of the second overflow valve 14 is communicated with the first oil outlet 112, and the third port c of the second overflow valve 14 is communicated with the first port a thereof.

In the above implementation, the second relief valve 14 is used to limit the maximum working pressure of the control oil line load-sensitive oil line in the load-sensitive pump. Since the load sensitive oil line pressure in the load sensitive pump 101 is taken from the load maximum pressure and this pressure is communicated as a control signal to the load sensitive pump 101.

When the load pressure reaches the set pressure of the second overflow valve 14, the second overflow valve 14 is opened to realize overflow, that is, the pressure control signal transmitted to the load sensitive pump 101 is limited, the output flow of the load sensitive pump 101 is limited from the source, and the overflow heat of the load sensitive pump 101 is reduced.

Illustratively, the protection unit 1 further includes a check throttle valve 15, the check throttle valve 15 is connected on the top of the protection valve body 11, the check throttle valve 15 is located between the second overflow valve 14 and the sequence valve 13, a first port a of the check throttle valve 15 is communicated with the first control port 113, and a second port b of the check throttle valve 15 is communicated with the spring cavity d of the sequence valve 13 and the first port a of the second overflow valve 14.

In the implementation manner, the one-way throttle valve 15 is used for filtering the pressure signal of the load-sensitive oil circuit in the load-sensitive pump 101, so as to prevent unstable variable displacement of the load-sensitive pump 101 caused by pressure fluctuation, and prevent unstable output flow, which results in unstable speed of the actuator.

Fig. 9 is a rear view of a protection valve body provided in an embodiment of the present disclosure, and in combination with fig. 9, for example, the protection unit 1 further includes a constant flow valve 16, the constant flow valve 16 is connected to a side wall of the protection valve body 11, a first oil port a of the constant flow valve 16 is communicated with a first control oil port 113, and a second oil port b of the constant flow valve 16 is communicated with the oil tank 102 (in combination with fig. 7).

In the implementation manner, the constant flow valve 16 is used for enabling the oil in the load-sensitive oil line in the load-sensitive pump 101 to flow back to the oil tank 102 at a fixed flow all the time when the chip-type multi-way valve operates, so as to prevent the oil in the load-sensitive oil line from being unable to be quickly decompressed after the valve core assembly 23 in the control unit 2 is reset back to the center, thereby causing malfunction of the load-sensitive pump 101 working in match with the multi-way valve.

In this embodiment, the constant flow valve 16 is not adjustable, so that the valve is prevented from being adjusted by mistake after leaving the factory, and can be selected according to the system flow before leaving the factory.

Illustratively, the protective valve body 11 further has a plurality of positioning pins 114, the positioning pins 114 are located on a side surface of the protective valve body 11 facing the control valve body 21 (see fig. 3), and the positioning pins 114 are inserted into the control valve body 21.

In the above implementation, the positioning pin 114 is used to quickly position the control valve body 21 and the protection valve body 11, so that the control valve body 21 and the protection valve body 11 can ensure high precision in installation, and meanwhile, the bolt is prevented from being subjected to shearing force in the working process to influence the connection and sealing performance between the control valve body 21 and the protection valve body 11.

Referring to fig. 3 again, for example, the protection valve body 11 further has a plurality of first sealing rings 115, the first sealing rings 115 are respectively connected to the first oil inlet 111, the first oil outlet 112 and the first control oil port 113, and the first sealing rings 115 are sandwiched between the adjacent control valve body 21 and the protection valve body 11.

In the above-described embodiment, the plurality of first sealing rings 115 are used to seal the mounting surface between the protection valve body 11 and the control valve body 21.

Referring to fig. 9 again, the protection valve body 11 further has a plug 116, and the plug 116 is plugged in the fabrication hole of the protection valve body 11.

In the above implementation, the plug 116 is used to plug off the fabrication hole necessary for machining the internal oil passage of the protection valve body 11.

In this embodiment, there may be three plugs 116, wherein one plug 116 is located on a first side surface of the protection valve body 11 (see fig. 2), and the other two plugs 116 are located on a second side surface of the protection valve body 11 (see fig. 7), and the first side surface and the second side surface are arranged oppositely.

With continuing reference to fig. 1, there may be a plurality of control valve bodies 21, the overflow oil-replenishing valve group 22 corresponds to the control valve bodies 21 one by one, and the plurality of control valve bodies 21 are connected together in sequence.

In the above implementation, by providing a plurality of overflow oil-supplementing valve banks 22, a plurality of actuators can be correspondingly connected according to actual requirements, so as to control a plurality of different actuators at the same time.

In this embodiment, the number of the control valve bodies 21 may be 4, and 4 control valve bodies 21 are correspondingly connected with 4 different actuators. During specific work, when one of the control valve bodies 21 works, load pressure is transmitted to a load-sensitive pump control port, the pump is variable in displacement, and the front-back pressure difference of the valve core on the oil inlet side of the control unit 2 is always set pressure of the load-sensitive pump, namely the flow passing through the control valve body 21 is only related to the opening size of the valve core assembly 23 and is unrelated to the load pressure.

When the control valve body 21 works, when the valve core assembly 23 moves rightwards, the oil enters the second oil inlet 211, then enters the first oil port a of the valve core assembly 23, then enters the first working oil port a of the valve core assembly 23, finally enters the hydraulic motor, and then returns through the outlet oil of the hydraulic motor, the second working oil port B of the valve core assembly 23, and the third oil port c of the valve core assembly 23. On the contrary, when the valve core assembly 23 moves leftward, the oil enters the second oil inlet 211, then enters the first oil port a of the valve core assembly 23, then enters the second working oil port B of the valve core assembly 23, and enters the hydraulic motor, and then returns through the outlet oil of the hydraulic motor, the first working oil port a of the valve core assembly 23, and the second oil port B of the valve core assembly 23.

When two or more control valve bodies 21 work, the highest load pressure is transmitted to the control oil port X of the load sensitive pump 101, the displacement of the load sensitive pump 101 is changed, and the front-back pressure difference of the valve core assembly 23 on the oil inlet side of the control valve body 21 with the highest load pressure is always the set pressure of the load sensitive pump, namely, the flow passing through the control valve body 21 is only related to the opening size of the valve core assembly 23 and is unrelated to the load pressure. Other control valve bodies 21 with non-highest load pressure improve the valve core outlet pressure at the oil inlet side of the control valve body 21 through the pressure difference compensation effect of the valve core assembly 23, so that the front and back pressure difference of the valve core assembly 23 is always the set pressure of the load-sensitive pump, namely, the flow passing through the control valve body 21 is only related to the opening size of the valve core assembly 23 and is unrelated to the load pressure.

Fig. 10 is a sectional view of a control valve body provided in an embodiment of the present disclosure, and in conjunction with fig. 10, the control valve body 21 exemplarily includes a control body 214 and a control end cover 215, the control body 214 is connected to the protective valve body 11, the control end cover 215 is connected to two opposite sides of the control body 214, and the control end cover 215 has an elastic member inside, and the elastic member is connected to the valve core assembly 23.

In the above implementation, the control end cover 215 and the control body 214 form a spring cavity, so that an elastic member is disposed inside the spring cavity and connected to the valve core assembly 23 through the elastic member to control the movement direction and the opening size of the valve core assembly 23.

In this embodiment, the control end cap 215 has an end cap oil inlet 2150, and the end cap oil inlet 2150 is connected to the spring cavity inside the valve core assembly 23.

In the above implementation, the end cover oil inlet 2150 of the control end cover 215 is used for introducing oil so as to control the movement of the elastic member through oil pressure, and thus control the movement direction and the opening size of the valve core assembly 23.

Illustratively, the control body 214 includes a first body 2141 and a second body 2142, the first body 2141 is fixed to one side of the second body 2142, the outer housings of the first overflow oil-replenishing valve 221 and the second overflow oil-replenishing valve 222 are connected to the first body 2141, the valve core assembly 23 is connected to the inside of the second body 2142, and the control end covers 215 are connected to the opposite sides of the second body 2142.

In the above implementation manner, the control body 214 is configured as the first body 2141 and the second body 2142, so that the first overflow oil replenishing valve 221 and the second overflow oil replenishing valve 222 can be conveniently installed, and meanwhile, the control body 214 can be conveniently processed and designed, and the universality is improved.

In this embodiment, the first body 2141 and the second body 2142 are connected by screws or washers to form a single control body 214.

Each second body 2142 has an oil inlet at the bottom, and in actual use, one or two oil inlets are generally selected, and if the oil inlet flow is large, the oil inlets of the control valve bodies 21 can be simultaneously utilized to reduce the oil inlet pressure loss.

Fig. 11 is a left side view of the oil return valve body provided in the embodiment of the present disclosure, and with reference to fig. 11, exemplarily, the multi-way valve further includes an oil return valve body 3, the oil return valve body 3 is connected to the control valve body 21, an oil return port 31 is formed in the oil return valve body 3, and the oil return port 31 is communicated with the second oil outlet 212.

In the above implementation, the oil return valve body 3 is used for oil return of the entire multi-way valve.

Optionally, the return valve body 3 further includes a second seal ring 32, and the second seal ring 32 is interposed between the return valve body 3 and the control valve body 21.

In the above-described embodiment, the second seal ring 32 is used to seal the mounting surface between the return valve body 3 and the control valve body 21.

Fig. 12 is a top view of the oil return valve body provided by the embodiment of the present disclosure, and in conjunction with fig. 12, 2 oil return ports 31 penetrate through the top and bottom of the oil return valve body 3, and the 2 oil return ports 31 are communicated with each other through an oval communication channel 33 (see fig. 11).

The working mode of the disk multi-way valve provided by the embodiment of the disclosure is briefly described as follows:

when one control unit 2 in the chip type multiway valve works, load pressure is transmitted to a control port X of the load sensitive pump 101, the displacement of the load sensitive pump 101 is changed, and the front-back pressure difference of a valve core on the oil inlet side of the control unit 2 is always set pressure of the load sensitive pump 101, namely the flow passing through the valve core assembly 23 is only related to the opening size of the valve core assembly 23 and is unrelated to the load pressure.

When the control unit 2 works, when the valve core assembly 23 moves rightwards, oil entering the second oil inlet 211 sequentially passes through the first oil port a of the valve core assembly 23 and the first working oil port a of the valve core assembly 23 to enter an execution element (such as a hydraulic motor), and the oil passes through the second working oil port B of the valve core assembly 23 and the third oil port c of the valve core assembly 23 after passing through the outlet of the hydraulic motor to realize oil return. On the contrary, when the valve core assembly 23 moves leftwards, the oil entering the second oil inlet 211 sequentially passes through the first oil port a of the valve core assembly 23 and the second working oil port B of the valve core assembly 23 to enter the hydraulic motor, and after passing through the outlet of the hydraulic motor, the oil enters the first working oil port a of the valve core assembly 23 and the second oil port B of the valve core assembly 23 to realize oil return.

When two or more control valve bodies 21 work, the highest load pressure is transmitted to a control port X of the load sensitive pump, the pump is variable in displacement, and the front-back pressure difference of the valve core assembly on the oil inlet side of the control valve body 21 with the highest load pressure is always the set pressure of the load sensitive pump, namely the flow passing through the control valve body 21 is only related to the opening size of the valve core assembly 23 and is unrelated to the load pressure. The other control valve bodies 21 with non-highest load pressure improve the outlet pressure of the valve core assembly 23 on the oil inlet side of the control valve body 21 through the differential pressure compensation effect of the valve core assembly 23, so that the front and back differential pressure of the valve core assembly 23 in the control valve body 21 is always the set pressure of the load-sensitive pump, that is, the flow passing through the control valve body 21 is only related to the opening size of the valve core assembly 23 and is unrelated to the load pressure.

The wafer type multi-way valve provided by the embodiment of the disclosure mainly comprises a protection unit 1, a control unit 2 and an oil return valve body 3. The protection unit 1 integrates valves such as an overflow valve, a constant flow valve and a one-way throttle valve, and the valves are respectively used for rapid pressure relief and filtering and pressure stabilization when the valve core assembly 23 of the safety protection control unit 2 is reset to the middle.

The control unit 2 is used for controlling the reversing and speed regulation of a hydraulic motor or a hydraulic cylinder of the executing element, and is integrated with an overflow oil supplementing valve for safety protection to prevent the executing element from being sucked empty.

And the oil return valve body 3 is used for returning oil to the whole multi-way valve.

Because protection valve body 11, control valve body 21, oil return valve body 3 are the part formula, and the quantity of control valve body 21 can be according to executive component demand quantity, and carry out the modularization combination with protection valve body 11, oil return valve body 3, consequently this part formula multiple unit valve application scope is extensive, integrates the degree height.

The above description is meant to be illustrative of the principles of the present disclosure and not to be taken in a limiting sense, and any modifications, equivalents, improvements and the like that are within the spirit and scope of the present disclosure are intended to be included therein.

Claims

1. The wafer type multi-way valve is characterized by comprising a protection unit (1) and a control unit (2);

the protection unit (1) comprises a protection valve body (11) and a first overflow valve (12), wherein a first oil inlet (111) and a first oil outlet (112) are formed in the protection valve body (11), the first oil inlet (111) is communicated with an oil outlet (P) of a load sensitive pump (101), the first oil outlet (112) is used for being communicated with an oil tank (102), the first overflow valve (12) is connected to the protection valve body (11), a first oil port (a) of the first overflow valve (12) is communicated with the first oil inlet (111), a second oil port (b) of the first overflow valve (12) is communicated with the first oil outlet (112), and a third oil port (c) of the first overflow valve (12) is communicated with the first oil port (a) of the first overflow valve (12);

the control unit (2) comprises a control valve body (21), an overflow oil supplementing valve group (22) and a valve core assembly (23), the control valve body (21) is connected with the protection valve body (11), a second oil inlet (211) and a second oil outlet (212) are formed in the control valve body (21), the second oil inlet (211) is communicated with the first oil inlet (111), the second oil outlet (212) is communicated with the first oil outlet (112), the overflow oil supplementing valve group (22) is connected with the control valve body (21), and the valve core assembly (23) is located inside the control valve body (21);

the first oil port (a) of the valve core assembly (23) is communicated with the second oil inlet (211), the second oil port (B) and the third oil port (c) of the valve core assembly (23) are communicated with the second oil outlet (212), and the first working oil port (A) and the second working oil port (B) of the valve core assembly (23) are communicated with an execution element;

the overflow oil-supplementing valve group (22) comprises a first overflow oil-supplementing valve (221) and a second overflow oil-supplementing valve (222), a first oil port (a) of the first overflow oil replenishing valve (221) is communicated with a first working oil port (A) of the valve core assembly (23), the second oil port (b) of the first overflow oil replenishing valve (221) is communicated with the second oil port (b) of the valve core assembly (23), a control oil port (c) of the first overflow oil replenishing valve (221) is communicated with a first oil port (a) of the first overflow oil replenishing valve, a first oil port (a) of the second overflow oil replenishing valve (222) is communicated with a second working oil port (B) of the valve core assembly (23), a second oil port (b) of the second overflow oil replenishing valve (222) is communicated with a third oil port (c) of the valve core assembly (23), and a control oil port (c) of the second overflow oil replenishing valve (222) is communicated with a first oil port (a) of the second overflow oil replenishing valve.

2. The plate-dividing type multiway valve according to claim 1, wherein the protection valve body (11) is further provided with a first control oil port (113), and the first control oil port (113) is used for being communicated with a control oil port (X) of the load-sensitive pump (101);

the control valve body (21) is also provided with two second control oil ports (213), the two second control oil ports (213) are communicated with the first control oil port (113), a fourth oil port (d) of the valve core assembly (23) is communicated with one of the second control oil ports (213), and a fifth oil port (e) of the valve core assembly (23) is communicated with the other second control oil port (213);

the protection unit (1) further comprises a sequence valve (13), the sequence valve (13) is connected to the top of the protection valve body (11), the sequence valve (13) is spaced from the first overflow valve (12), a first oil port (a) of the sequence valve (13) is communicated with the first oil inlet (111), a second oil port (b) of the sequence valve (13) is communicated with the first oil outlet (112), a third oil port (c) of the sequence valve (13) is communicated with the first oil port (a) of the sequence valve, and a spring cavity (d) of the sequence valve (13) is communicated with the first control oil port (113).

3. The plate-splitting type multiway valve according to claim 2, wherein the protection unit (1) further comprises a second overflow valve (14), the second overflow valve (14) is connected to the top of the protection valve body (11), the second overflow valve (14) is spaced from the sequence valve (13), a first oil port (a) of the second overflow valve (14) is communicated with the first control oil port (113), a second oil port (b) of the second overflow valve (14) is communicated with the first oil port (112), and a third oil port (c) of the second overflow valve (14) is communicated with the first oil port (a) of the second overflow valve (14).

4. The wafer type multiway valve according to claim 3, wherein the protection unit (1) further comprises a one-way throttle valve (15), the one-way throttle valve (15) is connected to the top of the protection valve body (11), the one-way throttle valve (15) is located between the second overflow valve (14) and the sequence valve (13), a first oil port (a) of the one-way throttle valve (15) is communicated with the first control oil port (113), and a second oil port (b) of the one-way throttle valve (15) is communicated with the spring cavity (d) of the sequence valve (13) and the first oil port (a) of the second overflow valve (14).

5. The wafer-type multiway valve according to claim 4, wherein the protection unit (1) further comprises a constant flow valve (16), the constant flow valve (16) is connected to a side wall of the protection valve body (11), a first oil port (a) of the constant flow valve (16) is communicated with the first control oil port (113), and a second oil port (b) of the constant flow valve (16) is communicated with the oil tank (102).

6. The disk manifold valve as claimed in claim 1, characterized in that the protective valve body (11) also has a plurality of positioning pins (114), the positioning pins (114) being located on a side of the protective valve body (11) facing the control valve body (21), and the positioning pins (114) being inserted into the control valve body (21).

7. The multi-piece multi-way valve according to claim 2, wherein the protection valve body (11) further comprises a plurality of first sealing rings (115), the first sealing rings (115) are respectively connected to the first oil inlet (111), the first oil outlet (112) and the first control oil port (113), and the first sealing rings (115) are clamped between the control valve body (21) and the protection valve body (11).

8. The disk multiway valve according to claim 1, wherein the protective valve body (11) further comprises a plug (116), the plug (116) being plugged into a process hole of the protective valve body (11).

9. The plate-dividing multiway valve according to claim 1, further comprising an oil return valve body (3), wherein the oil return valve body (3) is connected to the control valve body (21), the oil return valve body (3) has an oil return port (31), and the oil return port (31) is communicated with the second oil outlet (212).

10. Disk multiway valve according to claim 9, characterized in that the return valve body (3) further comprises a second sealing ring (32), the second sealing ring (32) being interposed between the return valve body (3) and the control valve body (21).