CN213775877U - Compact type electro-hydraulic control multi-way valve - Google Patents
Compact type electro-hydraulic control multi-way valve Download PDFInfo
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- CN213775877U CN213775877U CN202021572304.2U CN202021572304U CN213775877U CN 213775877 U CN213775877 U CN 213775877U CN 202021572304 U CN202021572304 U CN 202021572304U CN 213775877 U CN213775877 U CN 213775877U
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Abstract
The application discloses a compact type electro-hydraulic control multi-way valve which comprises a main oil way module, a working connection module and a backpressure module which are sequentially connected, wherein the main oil way module comprises an oil inlet oil way and a pressure reducing valve connected to the oil inlet oil way; the working connection module comprises at least two parallel connection reversing connections, each reversing connection comprises a three-position six-way reversing valve and a three-position four-way electromagnetic reversing valve, the three-position six-way reversing valve is connected with the oil inlet duct, each three-position six-way reversing valve comprises a valve body, a valve core and a piston rod, the valve cores are installed in the valve bodies, the piston rods control the valve cores to slide in the valve bodies, the piston rods are connected in a sliding mode in a pilot cavity, an oil outlet of each three-position four-way electromagnetic reversing valve is communicated with a rodless cavity in the pilot cavity, an oil return port of each three-position four-way electromagnetic reversing valve is communicated with a rod cavity in the pilot cavity, an oil outlet of a pressure reducing valve is connected with an oil inlet of each three-position four-way electromagnetic reversing valve, and the movement of the valve cores in the three-position six-way reversing valves is controlled by means of loss of the three-position four-way electromagnetic reversing valves, so that reversing is achieved, and response speed of oil path switching is improved.
Description
Technical Field
The utility model belongs to the technical field of fluid route distributor's technique and specifically relates to a compact electricity accuse multiple unit valve is related to.
Background
The multi-way valve is a combined valve which takes two or more reversing valves as main bodies, is used for controlling the movement of a plurality of executing elements, and is widely used in engineering vehicles such as water sweeping vehicles, garbage trucks, fire engines, mining vehicles and the like. The existing multi-way valve is mostly manually reversed, namely, the oil circuit is switched through each operating handle to control the action of each executing element, and the problem of slow response commonly exists in the multi-way valve.
SUMMERY OF THE UTILITY MODEL
In order to improve the response speed that the oil circuit switches, this application provides a compact electricity accuse multiple unit valve.
The application provides a compact electricity accuse multiple unit valve adopts following technical scheme:
a compact type electro-hydraulic control multi-way valve comprises a main oil way module, a working connection module and a backpressure module which are sequentially connected, wherein the main oil way module comprises an oil inlet oil way and a pressure reducing valve connected to the oil inlet oil way; the working connection module comprises at least two parallel connection reversing connections, each reversing connection comprises a three-position six-way reversing valve and a three-position four-way electromagnetic reversing valve, the three-position six-way reversing valve is connected with an oil inlet duct, the three-position six-way reversing valve comprises a valve body, a valve core arranged in the valve body and a piston rod controlling the valve core to slide in the valve body, the piston rod is connected in a pilot cavity of the valve body in a sliding mode, an oil outlet of the three-position four-way electromagnetic reversing valve is communicated with a rodless cavity in the pilot cavity, an oil return port of the three-position four-way electromagnetic reversing valve is communicated with a rod cavity in the pilot cavity, and an oil outlet of the pressure reducing valve is connected with an oil inlet of the three-position four-way electromagnetic reversing valve.
Through adopting above-mentioned technical scheme, hydraulic oil is leading-in to the oil feed oil duct in the main oil circuit module in from the oil pump, because the setting up of backpressure module makes when equipment starts, the oil feed oil duct possesses certain oil feed pressure, has avoided hydraulic oil directly to get back to the oil tank when equipment starts. When a button of the three-position four-way electromagnetic reversing valve in one reversing linkage is manually pressed, the control oil enters a pilot cavity of the three-position six-way reversing valve correspondingly connected with the control oil through the three-position four-way electromagnetic reversing valve, and a valve core is pushed to move by utilizing the sliding of a piston rod in the pilot cavity so as to realize the execution of an equipment function module, thereby replacing the traditional manual operation mode and greatly improving the response speed of oil path switching in the valve. Meanwhile, the control oil is from an internal oil circuit, a control pump is not required to be arranged outside, the design cost of the whole set of hydraulic system can be reduced, each reversing link controls the left and right reversing of the three-position six-way reversing valve through one three-position four-way electromagnetic reversing valve, the overall size of the multi-way valve can be reduced, and the installation space required by the valve body is reduced.
Preferably, the work connection module further comprises a main oil duct communicated with the oil inlet duct, the main oil duct is connected with the three-position six-way reversing valve, and a check valve is arranged between the main oil duct and an oil path of the three-position six-way reversing valve.
By adopting the technical scheme, the three-position six-way reversing valves in all the reversing links are connected with the main oil duct, hydraulic oil can be supplied to all the three-position six-way reversing valves after entering the main oil duct through the oil inlet duct, and then each reversing link can realize independent work without influencing each other, and synchronous execution of a plurality of functional modules of the equipment can be realized.
Preferably, the work connection module further comprises a pressure relief oil passage communicated with the oil inlet oil passage, and when the three-position six-way reversing valve is located at the middle position, the oil inlet oil passage is connected with the back pressure module.
By adopting the technical scheme, when the functional module of the equipment is not in operation, each three-position six-way reversing valve is in the middle position, the arrangement of the backpressure module is used for providing the initial pressure of the oil inlet duct when the equipment is started, the initial pressure is provided for the warming-up before the multi-way valve works, and the stability of the multi-way valve in the later period is improved.
Preferably, the backpressure module comprises a backpressure valve, and the pressure relief oil passage is connected with an oil inlet of the backpressure valve.
Through adopting above-mentioned technical scheme, the back pressure valve forms certain pressure because the function of valve itself to pressure can be adjusted, adopts the check valve as the lectotype of back pressure valve usually, because back pressure can be adjusted, and then can control the initial pressure of oil feed oil duct.
Preferably, the outlet pressure of the pressure reducing valve is less than the opening pressure of the back pressure valve.
By adopting the technical scheme, the opening pressure of the back pressure valve is larger than the outlet pressure of the pressure reducing valve, so that when the multi-way valve is started, part of hydraulic oil can flow to one side of the three-position four-way electromagnetic directional valve through the pressure reducing valve to be used as control oil to be reserved, when the three-position four-way electromagnetic directional valve is started, the oil way of the three-position six-way directional valve can be switched immediately, and the response speed of the oil way in the starting stage is improved.
Preferably, the oil outlet of the back pressure valve is connected with a function port.
By adopting the technical scheme, the function port is externally connected with an additional reversing union, and when each three-position six-way reversing valve is positioned at the middle position, hydraulic oil enters the function port through the pressure relief oil passage, so that the function module of the multi-way valve can be conveniently expanded.
Preferably, the three-position six-way reversing valve further comprises an emergency handle connected with the valve core.
Through adopting above-mentioned technical scheme, the setting of emergent handle is convenient for switch the oil circuit of tribit six-way switching-over valve when having a power failure or taking place emergency situation, plays the safety protection effect.
Preferably, the main oil path module further comprises an overflow valve connected with the oil inlet duct, and the oil inlet duct is provided with a pressure measuring port.
Through adopting above-mentioned technical scheme, the pressure measurement mouth is convenient for measure the oil pressure of oil feed oil duct department, improves the security of multiple unit valve during operation.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the input hydraulic oil is decompressed through a pressure reducing valve in the main oil way module and a matched backpressure module to form internal control oil, and the control oil is used for quickly switching the internal oil way of the three-position six-way reversing valve, so that the response speed is improved;
2. the three-position six-way reversing valves in each reversing connection only have one three-position four-way electromagnetic reversing valve to control oil path switching, so that the design cost of an internal oil path is simplified, the overall volume of the multi-way valve is reduced, and the installation space required by the multi-way valve is reduced;
3. the main oil duct communicated with the oil inlet duct is arranged in the working connection module, and all the three-position six-way reversing valves are connected with the main oil duct, so that independent work of all the reversing connections is not influenced, synchronous operation of multifunctional modules of the equipment is realized, and meanwhile, the working connection module is also provided with a pressure relief oil duct and a function port, so that the whole multi-way valve can be conveniently expanded in the functional modules;
4. the use safety of the whole multi-way valve is improved by arranging the emergency handle and the pressure measuring port.
Drawings
FIG. 1 is a schematic structural diagram of a compact electro-hydraulic control multi-way valve;
FIG. 2 is a hydraulic schematic diagram of a compact electro-hydraulically controlled multi-way valve;
FIG. 3 is a hydraulic schematic of the main oil circuit module;
FIG. 4 is a hydraulic schematic diagram showing primarily the reversing linkage;
fig. 5 is a schematic structural diagram of the reversing link.
Description of reference numerals: 1. a main oil circuit module; 11. an oil inlet duct; 12. a pressure reducing valve; 13. an overflow valve; 14. a pressure measuring port; 2. a working connection module; 21. a reversing connection; 211. a three-position six-way reversing valve; 2111. a valve body; 2112. a valve core; 2113. a piston rod; 2114. a rodless cavity; 2115. a rod cavity; 2116. an emergency handle; 212. a three-position four-way electromagnetic directional valve; 213. a one-way valve; 214. a pressure relief oil passage; 22. a main oil gallery; 3. a backpressure module; 31. a back pressure valve; 32. a functional port.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and fig. 2 together, the embodiment discloses a compact electro-hydraulic control multi-way valve, which includes a main oil path module 1, a working connection module 2, and a back pressure module 3, which are connected in sequence. The working connection module 2 includes at least two parallel connection couplings 21, in this embodiment, four connection couplings 21 are provided as an example, and working oil ports defining the four connection couplings 21 are respectively an oil port a 1/an oil port B1, an oil port a 2/an oil port B2, an oil port A3/an oil port B3, and an oil port a 4/an oil port B4. Taking the oil port a 1/oil port B1 of one of the reversing links 21 as an example, the oil port a 1/oil port B1 is connected with elements of the engineering machinery, and when the oil port a1 is an oil inlet, the oil port B1 is an oil return port, and one of the oil inlet and the oil return port controls the operation of the mechanical elements, that is, the four reversing links 21 control four functional modules of the mechanical elements.
Referring to fig. 2 and 3 together, the main oil circuit module 1 includes an oil inlet passage 11, a pressure reducing valve 12, and a relief valve 13. The pressure reducing valve 12 is connected in parallel with the overflow valve 13, oil inlets of the pressure reducing valve and the overflow valve are both connected with the oil inlet duct 11, and the oil inlet duct 11 is further provided with a pressure measuring port 14.
Referring to fig. 2 and 4 together, the work linkage module 2 further includes a main oil passage 22 and a pressure relief oil passage 214, and each of the reversing linkages 21 includes a three-position six-way reversing valve 211 and a three-position four-way electromagnetic reversing valve 212. An oil inlet of the three-position four-way electromagnetic directional valve 212 is connected with an oil outlet of the pressure reducing valve 12, an oil inlet of the three-position six-way directional valve 211 is respectively communicated with the main oil passage 22 and the pressure relief oil passage 214, and the main oil passage 22 is connected with the pressure relief oil passage 214 in parallel and is simultaneously communicated with the oil inlet passage 11. Meanwhile, in order to prevent the hydraulic oil entering the three-position six-way reversing valve 211 from flowing back, a check valve 213 is arranged between the main oil gallery 22 and an oil inlet of the three-position six-way reversing valve 211, and the check valve 213 allows the hydraulic oil to be conducted from the main oil gallery 22 side to the three-position six-way reversing valve 211 side.
The backpressure valve 31 module comprises a backpressure valve 31, an oil inlet of the backpressure valve 31 is communicated with the pressure relief oil passage 214, and an oil outlet of the backpressure valve 31 is communicated with a function port 32. When the three-position six-way reversing valve 211 in each reversing linkage 21 is in the neutral position, that is, in the oil path state of fig. 2, the oil inlet oil path 11 is communicated with the oil inlet of the back pressure valve 31 through the pressure relief oil path 214, and hydraulic oil directly enters the function port 32 through the back pressure valve 31. The back pressure valve 31 is opened at a pressure higher than the outlet pressure of the pressure reducing valve 12, and preferably, the back pressure valve 13 is opened at a pressure of 0.5 to 1 MPa.
Referring to fig. 4 and 5 together, the three-position six-way directional valve 211 includes a valve body 2111, a valve core 2112 installed in the valve body 2111, and a piston rod 2113 for controlling the sliding movement of the valve core 2112 in the valve body 2111, wherein the piston rod 2113 is connected to one end of the valve core 2112. A pilot chamber in which a piston rod 2113 slides is formed in the valve body 2111, and the piston rod 2113 divides the pilot chamber into a rod chamber 2115 and a rodless chamber 2114. An oil outlet of the three-position four-way electromagnetic directional valve 212 is communicated with the rodless cavity 2114, and an oil return port of the three-position four-way electromagnetic directional valve 212 is communicated with the rod cavity 2115. In addition, an emergency handle 2116 is connected to one end of the valve core 2112, which is away from the piston rod 2113, and the emergency handle 2116 is operated to drive the valve core 2112 and the piston rod 2113 to slide axially in the valve body 2111 together to realize manual oil path switching.
When the compact type electro-hydraulic control multi-way valve works, hydraulic oil is pumped into the oil inlet oil duct 11 through the oil pump, part of the hydraulic oil enters the pressure reducing valve 12 due to the existence of the back pressure valve 31, and meanwhile part of the hydraulic oil enters the main oil duct 22 and is reduced in pressure through the hydraulic oil of the pressure reducing valve 12 to serve as control oil for controlling the three-position four-way electromagnetic directional valve 212. At this time, a control button of the three-position four-way electromagnetic directional valve 212 is started to realize rapid direction change, control oil enters a pilot cavity of the three-position six-way directional valve 211 and drives a piston rod 2113 to axially move so as to realize driving of a valve core 2112, the three-position six-way directional valve 211 is switched over in an oil way, and hydraulic oil enters the three-position six-way directional valve 211 through the main oil duct 22 to be communicated with the oil way to realize operation of elements.
Because the reversing link 21 in the multi-way valve only controls the oil path switching of the three-position six-way reversing valve 211 through one three-position four-way electromagnetic reversing valve 212, the length L of the whole reversing link 21 is shortened, the size of the whole valve body 2111 is further reduced, and the installation space required by the valve body 2111 is reduced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The compact type electro-hydraulic control multi-way valve is characterized by comprising a main oil way module (1), a work connection module (2) and a backpressure module (3) which are sequentially connected, wherein the main oil way module (1) comprises an oil inlet duct (11) and a pressure reducing valve (12) connected to the oil inlet duct (11); the work connection module (2) comprises at least two parallel connection reversing connections (21), each connection reversing connection (21) comprises a three-position six-way reversing valve (211) and a three-position four-way electromagnetic reversing valve (212), the three-position six-way reversing valve (211) is connected with the oil inlet duct (11), wherein the three-position six-way reversing valve (211) comprises a valve body (2111), a valve core (2112) arranged in the valve body (2111) and a piston rod (2113) for controlling the valve core (2112) to slide in the valve body (2111), the piston rod (2113) is connected in a sliding way in a pilot cavity of the valve body (2111), an oil outlet of the three-position four-way electromagnetic directional valve (212) is communicated with a rodless cavity (2114) in the pilot cavity, an oil return port of the three-position four-way electromagnetic directional valve (212) is communicated with a rod cavity (2115) in the pilot cavity, an oil outlet of the reducing valve (12) is connected with an oil inlet of the three-position four-way electromagnetic directional valve (212).
2. The compact electro-hydraulic control multi-way valve according to claim 1, wherein the work connection module (2) further comprises a main oil passage (22) communicated with the oil inlet passage (11), the main oil passage (22) is connected with a three-position six-way reversing valve (211), and a check valve (213) is arranged between the main oil passage (22) and an oil passage of the three-position six-way reversing valve (211).
3. The compact electro-hydraulic control multiple unit valve according to claim 1, wherein the work connection module (2) further comprises a pressure relief oil passage (214) communicated with the oil inlet oil passage (11), and when the three-position six-way reversing valve (211) is in a neutral position, the oil inlet oil passage (11) is connected with the back pressure module (3).
4. The compact electrohydraulic multiple unit valve according to claim 3, characterized in that the backpressure module (3) comprises a backpressure valve (31), and the pressure relief oil passage (214) is connected with an oil inlet of the backpressure valve (31).
5. The compact electrohydraulic multiple unit valve according to claim 4, characterized in that the outlet pressure of the pressure reducing valve (12) is smaller than the opening pressure of the back pressure valve (31).
6. The compact electro-hydraulic multiplex valve according to claim 4, characterized in that the oil outlet of the back pressure valve (31) is connected with a function port (32).
7. The compact electro-hydraulic multiplex valve of claim 1 wherein the three-position, six-way directional valve (211) further comprises an emergency handle (2116) connected to the spool (2112).
8. The compact electro-hydraulic control multi-way valve according to claim 1, wherein the main oil way module (1) further comprises an overflow valve (13) connected with the oil inlet duct (11), and a pressure measuring port (14) is formed in the oil inlet duct (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021572304.2U CN213775877U (en) | 2020-08-01 | 2020-08-01 | Compact type electro-hydraulic control multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021572304.2U CN213775877U (en) | 2020-08-01 | 2020-08-01 | Compact type electro-hydraulic control multi-way valve |
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| Publication Number | Publication Date |
|---|---|
| CN213775877U true CN213775877U (en) | 2021-07-23 |
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| CN202021572304.2U Active CN213775877U (en) | 2020-08-01 | 2020-08-01 | Compact type electro-hydraulic control multi-way valve |
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| CN (1) | CN213775877U (en) |
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- 2020-08-01 CN CN202021572304.2U patent/CN213775877U/en active Active
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