CN112648409A - Integrated multi-way valve - Google Patents

Integrated multi-way valve Download PDF

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Publication number
CN112648409A
CN112648409A CN202110016963.0A CN202110016963A CN112648409A CN 112648409 A CN112648409 A CN 112648409A CN 202110016963 A CN202110016963 A CN 202110016963A CN 112648409 A CN112648409 A CN 112648409A
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CN
China
Prior art keywords
valve
confluence
control
oil
working
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110016963.0A
Other languages
Chinese (zh)
Inventor
姜洪
王震山
王清送
张夕航
王松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Shengbang Hydraulic Co ltd
Xuzhou Shengbang Machinery Co Ltd
Zhejiang Sunbun Technology Co Ltd
Sunbun Group Co Ltd
Original Assignee
Shanghai Shengbang Hydraulic Co ltd
Xuzhou Shengbang Machinery Co Ltd
Zhejiang Sunbun Technology Co Ltd
Sunbun Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Shengbang Hydraulic Co ltd, Xuzhou Shengbang Machinery Co Ltd, Zhejiang Sunbun Technology Co Ltd, Sunbun Group Co Ltd filed Critical Shanghai Shengbang Hydraulic Co ltd
Priority to CN202110016963.0A priority Critical patent/CN112648409A/en
Publication of CN112648409A publication Critical patent/CN112648409A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
    • F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603—Multiple-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components

Abstract

An integrated multiway valve. The problem of current multiple unit valve confluence switching unreliable is solved. The hydraulic control valve comprises a valve body, wherein a first oil inlet, a second oil inlet, a first feedback oil path and a second feedback oil path are arranged on the valve body, the valve body comprises a first working connection group, a second working connection group and a confluence connection, the confluence connection comprises a confluence valve core, a confluence shuttle valve, a confluence hydraulic control valve and a confluence electromagnetic valve, the confluence valve core is provided with a first position and a second position, the first position and the second position enable the first oil inlet and the second oil inlet to be confluent, a confluence valve core spring cavity has a movement trend for driving the confluence valve core to tend to the first position, and the confluence shuttle valve selects pressure oil at the confluence hydraulic control valve or the confluence electromagnetic valve to input to a confluence valve core control cavity and mutually cooperates with a confluence valve core spring cavity to control the position of the confluence valve core. The invention also has the advantages of simple structure, convenient assembly, reliable action, long service life and the like.

Description

Integrated multi-way valve
Technical Field
The invention relates to a multi-way valve, in particular to an integrated multi-way valve.
Background
The multi-way valve can provide reliable system solutions for manufacturers of engineering vehicles, for example, a crane, which uses a boom to lift a heavy object when working, and then transfers the heavy object from one position to another position by means of a rotary table to complete a work task, wherein the main actions include main winding, auxiliary winding, amplitude variation and expansion, and the actions are generally integrated on a main valve called the multi-way valve. The multi-way valve is a core component of a hydraulic control system of the crane and determines the efficiency of four actions of main hoisting, auxiliary hoisting, amplitude variation and stretching and energy consumption level of the whole crane.
For a double-pump system, no matter an electric control pump, a load sensitive pump or a fixed displacement pump gear pump, how to realize double-pump work or single-pump work according to actual working conditions is always a hot point in discussion, and how to realize confluence is usually realized through a confluence valve. The existing confluence valve is usually only directly switched to realize confluence cutoff through self-contained electromagnetic control, and the control is unreliable. Moreover, the construction machine is further characterized in that the installation space is limited, and a plurality of functions such as a pilot function for controlling reversing, a pressure reducing function for providing pilot oil, a secondary overflow valve function, a pressure cutting function and the like are required to be integrated on one valve.
Disclosure of Invention
In order to solve the problem that the confluence switching of the existing multi-way valve is unreliable in the background technology, the invention provides an integrated multi-way valve.
The technical scheme of the invention is as follows: an integrated multiway valve comprises a valve body, wherein a first oil inlet, a second oil inlet, a first feedback oil path and a second feedback oil path are arranged on the valve body, the valve body comprises a first work union group, a second work union group and a confluence union, the confluence union comprises a confluence spool, a confluence shuttle valve, a confluence hydraulic control valve and a confluence solenoid valve, the confluence spool is provided with a first position and a second position, the first oil inlet and the second oil inlet are converged, the confluence spool is provided with a spring cavity, the second position is disconnected, the confluence spool is provided with a movement trend, the confluence hydraulic control valve drives the confluence spool to tend to the first position, and the confluence shuttle valve selects pressure oil at the confluence shuttle valve or the confluence solenoid valve to be input into a confluence spool control cavity and mutually matched with the confluence spool spring cavity to control the position of the confluence spool.
As an improvement of the invention, the oil inlet of the confluence hydraulic control valve is connected with a first feedback oil path, the oil outlet of the confluence hydraulic control valve is communicated with the confluence shuttle valve, and the second feedback oil path is connected with the control cavity of the confluence hydraulic control valve and is matched with the spring cavity of the confluence hydraulic control valve to control the opening size of the confluence hydraulic control valve.
As a further improvement of the invention, the oil inlet of the confluence solenoid valve is connected with confluence pilot oil, and the oil outlet of the confluence solenoid valve is connected with a confluence shuttle valve.
As a further improvement of the invention, the first working connection group at least comprises two working connections and a first control block for controlling the working connections, each working connection is provided with a working valve core, and the first control block respectively controls the working valve cores of different working connections to act.
As a further improvement of the invention, the first control block comprises a control valve body, control solenoid valves and control shuttle valves, wherein each two control solenoid valves are respectively and correspondingly arranged in a group of control shuttle valves, and the control shuttle valves select pressure oil at oil outlets of the corresponding control solenoid valves and are used for controlling the action of the first working group.
As a further improvement of the invention, the control electromagnetic valve is a normally open type control electromagnetic valve and/or a normally closed type control electromagnetic valve and/or an electric proportional type electromagnetic control valve.
As a further improvement of the invention, the control shuttle valve comprises a shuttle valve body and a shuttle valve ball, wherein the shuttle valve body is provided with a circulation passage and a circulation hole, the shuttle valve ball is arranged on the circulation passage of the shuttle valve body, and the shuttle valve body is detachably connected with the control valve body.
As a further improvement of the present invention, the first working connection set is provided with a first oil return port and a second oil return port, the first working connection set is integrated with a diversion valve rod, the diversion valve rod is arranged between the first oil return port and the second oil return port, a first plug is arranged between the diversion valve rod and the first oil return port, and a second plug is arranged between the diversion valve rod and the second oil return port.
As a further improvement of the invention, the first working unit is provided with an oil return one-way valve, the one-way valve sleeve and the one-way valve core, the oil return one-way valve comprises a one-way valve core which is sleeved in the one-way valve sleeve and is in sliding fit with the one-way valve sleeve, a one-way spring is arranged between the one-way valve sleeve and the one-way valve core, and the one-way valve sleeve is arranged on the working unit through a snap spring.
As a further improvement of the invention, the first working connection group is provided with a constant flow valve, a feedback overflow valve, a pressure reducing valve and a safety overflow valve, wherein the constant flow valve is used for realizing the middle unloading of the first feedback oil path; the feedback overflow valve is used for realizing the constant pressure function under certain pressure; the pressure reducing valve and the safety overflow valve provide a pilot oil source for the system to drive the working valve core.
The invention has the advantages that the converging hydraulic control valve and the converging electromagnetic valve are arranged, so that the converging valve core of the converging union can realize the electric control double-pump cut-off and the hydraulic control double-pump cut-off, and the product converging and double-pump cut-off control is reliable. The invention also has the advantages of simple structure, convenient assembly, reliable action, long service life and the like.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a flow coupling 3 in the first and second embodiments of the present invention.
Fig. 4 is a hydraulic schematic diagram of the confluence 3 of fig. 3.
Fig. 5 is a schematic structural diagram of the first control block 4 in fig. 1.
Fig. 6 is a schematic structural diagram of the first control block 4 in fig. 2.
Fig. 7 is a schematic sectional view of the control shuttle valve 43 of fig. 5.
Fig. 8 is a hydraulic schematic of fig. 5.
Fig. 9 is a hydraulic schematic of fig. 6.
Fig. 10 is a schematic structural diagram of a first working unit 1 according to a first embodiment of the present invention.
Fig. 11 is a schematic cross-sectional view of fig. 10.
Fig. 12 is a schematic view of the half-section structure of fig. 10.
In the figure, 1, a first work group; 11. a working unit; 12. a working valve core; 13. a diverter valve stem; 131. a first plug; 132. a second plug; 14. an oil return check valve; 141. a one-way valve housing; 142. a one-way valve core; 143. a one-way spring; 144. a clamp spring; 15. a constant flow valve; 16. a feedback overflow valve; 17. a pressure reducing valve; 18. a safety overflow valve; 2. a second working union; 3. combining; 31. a confluence spool; 32. a confluence shuttle valve; 33. a confluence hydraulic control valve; 34. a confluence solenoid valve; 35. converging the pilot oil; 4. a first control block; 41. a control valve body; 42. controlling the electromagnetic valve; 43. a control shuttle valve; 431. a shuttle valve body; 432. a shuttle valve ball; 433. a flow-through channel; 434. a flow-through hole; p1, a first oil inlet; p2, a second oil inlet; LS1, a first feedback oil path; LS2, a second feedback oil path; a first oil return port T1; t2, second oil return port.
Detailed Description
The embodiments of the invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1 and fig. 2-12, an integrated multiway valve includes a valve body, the valve body is provided with a first oil inlet P1, a second oil inlet P2, a first feedback oil path LS1 and a second feedback oil path LS2, the valve body includes a first working combination 1, a second working combination 2 and a confluence combination 3, the confluence combination includes a confluence spool 31, a confluence shuttle valve 32, a confluence hydraulic control valve 33 and a confluence solenoid valve 34, the confluence spool has a first position at which the first oil inlet and the second oil inlet are confluent and a second position at which the first oil inlet and the second oil inlet are disconnected, a confluence spool spring cavity has a movement tendency of driving the confluence spool to approach the first position, and the confluence shuttle valve selects pressure oil at the confluence hydraulic control valve or the confluence solenoid valve to input to a confluence spool control cavity and cooperate with the confluence spool spring cavity to control the position of the confluence spool. The invention has the advantages that the converging hydraulic control valve and the converging electromagnetic valve are arranged, so that the converging valve core of the converging union can realize the electric control double-pump cut-off and the hydraulic control double-pump cut-off, and the product converging and double-pump cut-off control is reliable. The invention also has the advantages of simple structure, convenient assembly, reliable action, long service life and the like.
The oil inlet of the confluence hydraulic control valve is connected with the first feedback oil path, the oil outlet of the confluence hydraulic control valve is communicated with the confluence shuttle valve, and the second feedback oil path is connected with the control cavity of the confluence hydraulic control valve and is matched with the spring cavity of the confluence hydraulic control valve to control the opening size of the confluence hydraulic control valve. Specifically, an oil inlet of the confluence solenoid valve is connected with the confluence pilot oil 35, and an oil outlet of the confluence solenoid valve is connected with the confluence shuttle valve. The confluence can be cut off by the electric control double pump and can also be cut off by the hydraulic control double pump, the hydraulic control double pump cutting off can be realized only by the first work group 1 and the second work group 2 working and outputting loads at the same time, the electric control cutting off realized by the confluence electromagnetic valve is prior to the hydraulic control cutting off, namely when the first work group 1 or the second work group 2 is not opened, the P1 and the P2 can realize reliable confluence. The confluence solenoid valve has a priority override function, namely, in the priority, the confluence solenoid valve can be reversed as long as the confluence solenoid valve is electrified no matter what state the confluence hydraulic control valve is in. When the first working unit 1 and the second working unit 2 are both loaded, the confluence fluid control valve can close the confluence valve core at the moment. When the confluence electromagnetic valve is opened, the confluence valve core can be closed, electric control priority is realized, and automatic confluence or disconnection operation is realized by hydraulic control along with the action of the system.
The first working connection group at least comprises two working connections 11 and a first control block 4 for controlling the working connections, each working connection is provided with a working valve core 12, and the first control block respectively controls the working valve cores of different working connections to act. Specifically, the second working connection group is also provided with a control block, namely the first control block controls working valve cores of all working connections on the first working connection group, and the working connections in the first working connection group realize a common control block, so that the product volume is reduced.
The first control block comprises a control valve body 41, control solenoid valves 42 and control shuttle valves 43, wherein each two control solenoid valves are correspondingly provided with one control shuttle valve for one group, and the control shuttle valves select pressure oil at oil outlets of the corresponding control solenoid valves and are used for controlling the first working group to act. The first control block integrates a normally open/normally closed pilot control function to realize the reversing of the working valve core; meanwhile, the shuttle valve is integrally controlled, and pilot oil is led out to realize other functions. Specifically, the first embodiment and the second embodiment respectively disclose that the working valve core is controlled by electric control and hydraulic control.
The control electromagnetic valve 42 is a normally open type control electromagnetic valve and/or a normally closed type control electromagnetic valve and/or an electric proportional type electromagnetic control valve. Specifically, the control electromagnetic valve has two forms of a switch electromagnetic valve and an electric proportional electromagnetic valve, and the switch electromagnetic valve has two forms of a normally open state and a normally closed state. Two modes of a normally open type control electromagnetic valve and a normally closed type control electromagnetic valve are disclosed in the attached figure 8. The function of the electric control block or the hydraulic control block is to change the direction of the working valve core, but the realization mode is different. For example, four control solenoid valves in fig. 8 have two states, namely a normally open state and a normally closed state. When the normally open type control solenoid valve is used, pilot control oil sources are required to be input into ports a and b, and the shuttle valve is used for leading out pilot oil of the ports a and b and controlling other elements. When the normally closed control solenoid valve is used, two a/b can be communicated, and the main valve core of which the valve is connected is determined to be reversed through the power on/off of the solenoid valve, so that one pilot oil source is saved. Fig. 9 is a schematic diagram of a working connection valve element that is switched in an electric proportional manner, and only a stable pilot oil source needs to be provided, and proportional switching of the working connection valve element is achieved by using the pressure reduction function of the electric proportional pressure reducing valve. More specifically, the reversing of the desired working connection can be realized by controlling the on-off of the electromagnetic valve, and the reversing device is simple in structure and convenient and reliable to control.
The control shuttle valve 43 comprises a shuttle valve body 431 and a shuttle valve ball 432, a circulation channel 433 and a circulation hole 434 are arranged on the shuttle valve body, the shuttle valve ball is arranged on the circulation channel of the shuttle valve body, and the shuttle valve body is detachably connected with the control valve body. The control shuttle valve can be disassembled and assembled, so that the control and selection of an oil way are facilitated, and the maintenance is facilitated.
The first working connection group is provided with a first oil return port T1 and a second oil return port T2, the first working connection group is integrated with a diversion valve rod 13, the diversion valve rod is arranged between the first oil return port and the second oil return port, a first plug 131 is arranged between the diversion valve rod and the first oil return port, and a second plug 132 is arranged between the diversion valve rod and the second oil return port. The shunt valve rod is arranged between the two oil return channels and is isolated from the oil return channels through the first plug and the second plug, and the compression of the whole volume is facilitated.
The first work union is provided with an oil return one-way valve 14, the oil return one-way valve comprises a one-way valve sleeve 141 and a one-way valve core 142, the one-way valve core sleeve is arranged in the one-way valve sleeve and matched with the one-way valve sleeve in a sliding mode, a one-way spring 143 is arranged between the one-way valve sleeve and the one-way valve core, and the one-way valve sleeve is arranged on the work union through a clamp spring 144. The oil return one-way valve is simple in structure, convenient and reliable to install and compact in structure.
The first working connection group is provided with a constant flow valve 15, a feedback overflow valve 16, a pressure reducing valve 17 and a safety overflow valve 18, and the constant flow valve is used for realizing the middle unloading of the first feedback oil path; the feedback overflow valve is used for realizing the constant pressure function under certain pressure; the pressure reducing valve and the safety overflow valve provide a pilot oil source for the system to drive the working valve core. The work is united and is integrated with four functions of a constant flow valve, a feedback overflow valve, a pressure reducing valve and a safety overflow valve, so that the product is simple in structure, convenient to assemble and higher in safety performance.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The skilled person should understand that: although the invention has been described in terms of the above specific embodiments, the inventive concept is not limited thereto and any modification applying the inventive concept is intended to be included within the scope of the patent claims.

Claims (10)

1. An integrated multiple unit valve, includes the valve body, its characterized in that: the valve body is provided with a first oil inlet (P1), a second oil inlet (P2), a first feedback oil path (LS 1) and a second feedback oil path (LS 2), the valve body comprises a first working combination (1), a second working combination (2) and a confluence combination (3), the confluence union comprises a confluence valve core (31), a confluence shuttle valve (32), a confluence hydraulic control valve (33) and a confluence electromagnetic valve (34), the confluence valve core is provided with a first position and a second position, wherein the first position and the second position enable the first oil inlet and the second oil inlet to be confluent, the spring cavity of the confluence valve core has a movement trend of driving the confluence valve core to tend to the first position, the confluence shuttle valve selects pressure oil at the confluence hydraulic control valve or confluence electromagnetic valve to be input into the confluence valve core control cavity and is matched with the confluence valve core spring cavity to control the position of the confluence valve core.
2. The integrated multiway valve of claim 1, wherein the oil inlet of the confluence hydraulic control valve is connected to a first feedback oil path, the oil outlet of the confluence hydraulic control valve is connected to the confluence shuttle valve, and the second feedback oil path is connected to the control chamber of the confluence hydraulic control valve and is matched with the spring chamber of the confluence hydraulic control valve to control the opening of the confluence hydraulic control valve.
3. The integrated multiway valve of claim 2, wherein the oil inlet of the confluence solenoid valve is connected to a confluence pilot oil (35), and the oil outlet of the confluence solenoid valve is connected to a confluence shuttle valve.
4. An integrated multiple-way valve according to claim 1, characterized in that the first working group comprises at least two working units (11) and a first control block (4) for controlling the working units, each working unit is provided with a working spool (12), and the first control block controls the action of the working spools of different working units.
5. The integrated multiway valve according to claim 4, wherein the first control block comprises a control valve body (41), control solenoid valves (42) and control shuttle valves (43), each two control solenoid valves are respectively provided with one control shuttle valve for one group, and the control shuttle valves select pressure oil at oil outlets of the corresponding control solenoid valves and are used for controlling the action of the first working group.
6. An integrated multiway valve according to claim 5, characterized in that the control solenoid valves (42) are normally open type control solenoid valves and/or normally closed type control solenoid valves and/or electrically proportional solenoid-operated valves.
7. The integrated multiway valve of claim 5, wherein the control shuttle valve (43) comprises a shuttle valve body (431) and a shuttle valve ball (432), the shuttle valve body is provided with a flow passage (433) and a flow hole (434), the shuttle valve ball is arranged on the flow passage of the shuttle valve body, and the shuttle valve body is detachably connected with the control valve body.
8. The integrated multiway valve of claim 4, wherein the first working assembly has a first oil return port (T1) and a second oil return port (T2), the first working assembly has a diverter valve stem (13), the diverter valve stem is disposed between the first oil return port and the second oil return port, the diverter valve stem and the first oil return port have a first plug (131), and the diverter valve stem and the second oil return port have a second plug (132).
9. The integrated multiway valve as recited in claim 8, wherein the first working group is provided with an oil return check valve (14), the oil return check valve comprises a check valve sleeve (141) and a check valve core (142), the check valve core is sleeved in the check valve sleeve and is in sliding fit with the check valve sleeve, a check spring (143) is arranged between the check valve sleeve and the check valve core, and the check valve sleeve is arranged on the working group through a snap spring (144).
10. The integrated multiway valve according to claim 4, wherein the first working connection group is provided with a constant flow valve (15), a feedback overflow valve (16), a pressure reducing valve (17) and a safety overflow valve (18), and the constant flow valve is used for realizing the middle unloading of the first feedback oil path; the feedback overflow valve is used for realizing the constant pressure function under certain pressure; the pressure reducing valve and the safety overflow valve provide a pilot oil source for the system to drive the working valve core.
CN202110016963.0A 2021-01-07 2021-01-07 Integrated multi-way valve Pending CN112648409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110016963.0A CN112648409A (en) 2021-01-07 2021-01-07 Integrated multi-way valve

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Application Number Priority Date Filing Date Title
CN202110016963.0A CN112648409A (en) 2021-01-07 2021-01-07 Integrated multi-way valve

Publications (1)

Publication Number Publication Date
CN112648409A true CN112648409A (en) 2021-04-13

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Application Number Title Priority Date Filing Date
CN202110016963.0A Pending CN112648409A (en) 2021-01-07 2021-01-07 Integrated multi-way valve

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113175455A (en) * 2021-04-26 2021-07-27 江苏汇智高端工程机械创新中心有限公司 Multi-way valve confluence control structure of hydraulic excavator
CN114476947A (en) * 2021-12-29 2022-05-13 中联重科股份有限公司 Emergency hydraulic system and automobile crane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113175455A (en) * 2021-04-26 2021-07-27 江苏汇智高端工程机械创新中心有限公司 Multi-way valve confluence control structure of hydraulic excavator
CN113175455B (en) * 2021-04-26 2024-04-02 江苏汇智高端工程机械创新中心有限公司 Multi-way valve confluence control structure of hydraulic excavator
CN114476947A (en) * 2021-12-29 2022-05-13 中联重科股份有限公司 Emergency hydraulic system and automobile crane

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