CN211901128U - Multi-way valve with integral mechanical pilot check valve and electro-hydraulic proportional control - Google Patents
Multi-way valve with integral mechanical pilot check valve and electro-hydraulic proportional control Download PDFInfo
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- CN211901128U CN211901128U CN202020142565.4U CN202020142565U CN211901128U CN 211901128 U CN211901128 U CN 211901128U CN 202020142565 U CN202020142565 U CN 202020142565U CN 211901128 U CN211901128 U CN 211901128U
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Abstract
The utility model discloses a multi-way valve with integral mechanical pilot check valve and electro-hydraulic proportional control, including the main valve body, install the valve rod in the main valve body, be provided with second oil inlet, first oil duct, working fluid port A, second oil duct, working fluid port B, third oil duct, fifth oil duct and third oil pocket on the main valve body; a first check valve is arranged between the working oil port A and the third oil cavity, a valve core pilot mechanical control device is arranged between the first check valve and the valve rod, and a second check valve is arranged between the first oil inlet and the second oil duct; an electro-hydraulic control device for controlling the action of the valve rod is arranged on the main valve body; the manual and electric combined control is adopted, the hydraulic control device can be used when the load is large or small, the electric control valve rod is used for controlling the action when the load is large, the operation is simple, the labor intensity is reduced, the manual operation mode is reserved, the operation time can be shortened when the load is small, the hydraulic control device can be used when the electric hydraulic control device breaks down, and the reliability is improved.
Description
Technical Field
The utility model relates to a hydraulic pressure multiple unit valve especially relates to the multiple unit valve with integral mechanical guide check valve and electric liquid proportional control.
Background
The common multi-way valve is usually controlled manually, the operating force is greatly influenced by the load, when the load is overlarge, the valve rod can be operated to act by large force, the labor intensity is high, the automation degree is low, and the long-distance control cannot be carried out.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a degree of automation is high, can realize remote control's multiple unit valve that has integral mechanical guide check valve and electric liquid proportional control is provided.
In order to solve the technical problem, the technical scheme of the utility model is that: the multi-way valve with the integral mechanical pilot check valve and the electro-hydraulic proportional control comprises a main valve body, wherein a main valve hole is formed in the main valve body, a valve rod is installed in the main valve hole, a second oil inlet, a first oil inlet, a working oil port A and a working oil port B are formed in the main valve body, a first oil duct located on one side of the first oil inlet is formed in the main valve body, a second oil duct, a third oil duct and a fifth oil duct are sequentially formed in the main valve body on the other side of the first oil inlet, the first oil duct, the second oil duct, the third oil duct and the fifth oil duct are all communicated with the main valve hole, the third oil duct is directly communicated with the working oil port B, and a third oil cavity which is provided with the valve rod and communicated with the main valve hole is formed in the main valve; the second oil inlet is communicated with the main valve hole and is positioned between the third oil cavity and the second oil channel;
a first check valve is arranged between the working oil port A and the third oil cavity, a valve core pilot mechanical control device for controlling reverse hydraulic opening of the first check valve is arranged between the first check valve and the valve rod, a second check valve is arranged between the first oil inlet and the second oil duct, and a stop valve for plugging the fifth oil duct is arranged on the main valve body; and an electro-hydraulic control device which is connected with the reset end of the valve rod and is used for controlling the action of the valve rod is arranged on the main valve body.
As a preferred technical solution, the valve core pilot mechanical control device includes a valve core carrier rod, one end of the valve core carrier rod extends into the valve body of the first one-way valve and abuts against the valve core end of the first one-way valve; the valve rod is provided with an annular ejector rod groove which corresponds to the valve core ejector rod and extends radially, the other end of the valve core ejector rod extends into the ejector rod groove, the ejector rod groove comprises a deep groove area and a shallow groove area which respectively correspond to the closing state and the opening maintaining state of the first one-way valve, a conical surface used for driving the valve core ejector rod to act is arranged between the deep groove area and the shallow groove area, and the shallow groove area is arranged close to one side of the working oil port B.
As a preferable technical scheme, a valve body of the first check valve is provided with a guide sleeve matched with the valve core mandril, a valve body of the first check valve is provided with a first oil hole and a second oil hole which are positioned at two sides of the guide sleeve, and the first oil hole and the second oil hole are communicated with a valve cavity of the first check valve and the third oil cavity.
As a preferable technical scheme, a valve core of the first one-way valve is provided with an ejector rod centering hole, a centering rod extending into the ejector rod centering hole is arranged on the valve core ejector rod, the outer diameter of the centering rod is smaller than the inner diameter of the ejector rod centering hole, a centering buffer device is arranged inside the valve core of the first one-way valve, and the centering buffer device is located between a return spring of the first one-way valve and the centering rod.
As a preferable technical scheme, the centering buffer device comprises a centering buffer seat fixedly installed in a valve core inner cavity of the first one-way valve, a centering buffer spring arranged facing the centering rod is installed on the centering buffer seat, a centering buffer ball clamped between the ejector rod centering hole and the centering buffer spring is installed in a valve core of the first one-way valve, and an oil passing hole communicating the valve core inner cavity of the first one-way valve and a valve body inner cavity of the first one-way valve is formed in the centering buffer seat.
As an optimal technical scheme, the electro-hydraulic control device comprises an electric control seat, an electric control inner cavity is arranged in the electric control seat, the reset end of the valve rod extends into the electric control inner cavity and is provided with a valve rod reset device, the end part of the valve rod is provided with a piston which is divided into a first oil cavity and a second oil cavity by the electric control inner cavity, the valve rod reset device is located in the first oil cavity, a fourth oil channel communicated with the first oil cavity is arranged on the electric control seat, a first electro-hydraulic proportional valve communicated with the fourth oil channel is arranged on the electric control seat, and a second electro-hydraulic proportional valve communicated with the second oil cavity is further arranged on the electric control seat.
As a preferred technical scheme, the valve rod resetting device comprises an outer limiting block in threaded connection with the end part of the valve rod, an inner limiting table is arranged on the valve rod, two spring seats are arranged on the valve rod in a sleeved mode and between the inner limiting table and the outer limiting block in an opposite mode, and a resetting spring is arranged on the valve rod in a sleeved mode and between the two spring seats.
As a preferred technical scheme, an overload overflow valve is installed between the working oil port a and the first oil duct, the overload overflow valve is perpendicular to the first check valve, the front end of the valve body of the overload overflow valve extends into the working oil port a on the outer side of the first check valve, and the end of the first check valve abuts against the front end of the valve body of the overload overflow valve.
By adopting the technical scheme, the multi-way valve with the integral mechanical pilot check valve and the electro-hydraulic proportional control comprises a main valve body, wherein a main valve hole is formed in the main valve body, a valve rod is installed in the main valve hole, a second oil inlet, a first oil inlet, a working oil port A and a working oil port B are formed in the main valve body, a first oil duct is arranged in the main valve body and positioned on one side of the first oil inlet, a second oil duct, a third oil duct and a fifth oil duct are sequentially arranged in the main valve body on the other side of the first oil inlet, the first oil duct, the second oil duct, the third oil duct and the fifth oil duct are all communicated with the main valve hole, the third oil duct is directly communicated with the working oil port B, and a third oil cavity which is provided with the valve rod and communicated with the main valve hole is formed in the main valve; the second oil inlet is communicated with the main valve hole and is positioned between the third oil cavity and the second oil channel; a first check valve is arranged between the working oil port A and the third oil cavity, a valve core pilot mechanical control device for controlling reverse hydraulic opening of the first check valve is arranged between the first check valve and the valve rod, a second check valve is arranged between the first oil inlet and the second oil duct, and a stop valve for plugging the fifth oil duct is arranged on the main valve body; an electro-hydraulic control device which is connected with the reset end of the valve rod and is used for controlling the action of the valve rod is arranged on the main valve body; the manual and electric combined control is adopted, the two control modes can be used when the load is large or small, the electric control valve rod is used for controlling the action when the load is large, the operation is simple, the labor intensity is reduced, the manual operation mode is reserved, the operation time can be shortened when the load is small, the operation can be still carried out when the electric-hydraulic control device fails, and the reliability is improved.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1 is a schematic diagram of a bit state in an embodiment of the present invention;
FIG. 2 is an enlarged view taken at I in FIG. 1;
FIG. 3 is a schematic diagram of a left shift down state according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a left shift floating position of the embodiment of the present invention;
FIG. 5 is a schematic structural view of the embodiment of the present invention in a right shift and up state;
in the figure: 11-main valve body; 12-a valve stem; 13-a second oil inlet; 14-a first oil inlet; 21-a first oil passage; 22-working oil port A; 23-a second oil passage; 24-a working oil port B; 25-a third oil passage; 26-a fifth oil passage; 27-a third oil chamber; 31-a first one-way valve; 32-a second one-way valve; 33-a shut-off valve; 34-overload relief valve; 41-valve core mandril; 42-deep groove region; 43-shallow groove area; 44-a conical surface; 45-a guide sleeve; 46-first oil hole; 47-a second oil hole; 51-centering rod; 52-centering the cushion seat; 53-centering the buffer spring; 54-centering the buffer ball; 61-an electric control seat; 62-a first oil chamber; 63-a second oil chamber; 64-a piston; 65-a fourth oil passage; 66-a first electro-hydraulic proportional valve; 67-a second electro-hydraulic proportional valve; 71-an outer limiting block; 72-spring seat; 73-return spring.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1, the multiway valve with integral mechanical pilot check valve and electro-hydraulic proportional control comprises a main valve body 11, a main valve hole is arranged in the main valve body 11, a valve rod 12 is arranged in the main valve hole, a second oil inlet 13 and a first oil inlet 14 are arranged on the main valve body 11, a first oil passage 21 and a working oil port a22 located on one side of the first oil inlet 14 are provided in the main valve body 11, a second oil passage 23, a working oil port B24, a third oil passage 25 and a fifth oil passage 26 are sequentially arranged in the main valve body 11 on the other side of the first oil inlet 14, the first oil passage 21, the second oil passage 23, the third oil passage 25, and the fifth oil passage 26 all communicate with the main valve hole, the third oil passage 25 is directly communicated with the working oil port B24, and a third oil chamber 27 provided with a ring and the valve rod 12 and communicated with the main valve hole is arranged in the main valve body 11; the second oil inlet 13 is communicated with the main valve hole and is positioned between the third oil chamber 27 and the second oil passage 23; the first oil passage 21 and the fifth oil passage 26 are both communicated with the oil tank through oil return ports;
a first check valve 31 is installed between the working oil port a22 and the third oil chamber 27, a spool pilot mechanical control device for controlling reverse hydraulic opening of the first check valve 31 is installed between the first check valve 31 and the valve rod 12, a second check valve 32 is installed between the first oil inlet 14 and the second oil passage 23, and a stop valve 33 for blocking the fifth oil passage 26 is installed on the main valve body 11; an electro-hydraulic control device which is connected with the reset end of the valve rod 12 and is used for controlling the action of the valve rod 12 is installed on the main valve body 11.
As shown in fig. 2, the spool pilot mechanical control device includes a spool rod 41, and one end of the spool rod 41 extends into the valve body of the first check valve 31 and abuts against the spool end of the first check valve 31; the valve rod 12 is provided with an annular ejector rod groove corresponding to the valve core ejector rod 41 and extending radially, the other end of the valve core ejector rod 41 extends into the ejector rod groove, the ejector rod groove comprises a deep groove area 42 and a shallow groove area 43 corresponding to the closed state and the open maintaining state of the first check valve 31 respectively, a tapered surface 44 for driving the valve core ejector rod 41 to move is arranged between the deep groove area 42 and the shallow groove area 43, and the shallow groove area 43 is arranged close to one side of the working oil port B24. A guide sleeve 45 matched with the valve core mandril 41 is arranged on the valve body of the first check valve 31, a first oil hole 46 and a second oil hole 47 which are positioned at two sides of the guide sleeve 45 are arranged on the valve body of the first check valve 31, and the first oil hole 46 and the second oil hole 47 are communicated with the valve cavity of the first check valve 31 and the third oil cavity 27. A mandril centering hole is formed in the valve core of the first one-way valve 31, a centering rod 51 extending into the mandril centering hole is arranged on the valve core mandril 41, the outer diameter of the centering rod 51 is smaller than the inner diameter of the mandril centering hole, a centering buffer device is arranged inside the valve core of the first one-way valve 31, and the centering buffer device is positioned between the reset spring 73 of the first one-way valve 31 and the centering rod 51. The centering buffer device comprises a centering buffer seat 52 fixedly installed in a valve core inner cavity of the first one-way valve 31, a centering buffer spring 53 arranged facing the centering rod 51 is installed on the centering buffer seat 52, a centering buffer ball 54 clamped between the ejector rod centering hole and the centering buffer spring 53 is installed in a valve core of the first one-way valve 31, and an oil passing hole for communicating the valve core inner cavity of the first one-way valve 31 with a valve body inner cavity of the first one-way valve 31 is formed in the centering buffer seat 52.
The working principle of the valve core pilot mechanical control device is as follows: when the deep groove area 42 of the stem groove on the valve stem 12 is engaged with the spool stem 41, as shown in fig. 2, the first check valve 31 is in a closed state, when the valve stem 12 is moved to the left, when the tapered surface 44 of the stem groove engages the spool stem 41, the conical surface 44 gradually jacks up the valve core mandril 41, the centering rod 51 on the valve core mandril 41 moves upwards to enter a mandril centering hole on the valve core of the first one-way valve 31, the centering rod 51 jacks up the centering buffer ball 54, the centering buffer ball 54 compresses the centering buffer spring 53 to move upwards, the valve core inner cavity of the first one-way valve 31 is communicated with the main valve hole through a gap between the centering rod 51 and the mandril centering hole, the first oil hole 46 and the second oil hole 47, pilot oil flows, and in the process that the valve core mandril 41 continues to rise, the valve core mandril 41 can easily jack the valve core of the first one-way valve 31, and the required force ratio is smaller; the valve core ejector rod 41, the guide sleeve 45, the centering rod 51, the centering buffer device and the first one-way valve 31 are organically combined to form an integral structure, and the installation and the use are convenient.
Electro-hydraulic control device includes automatically controlled seat 61, be provided with automatically controlled inner chamber in the automatically controlled seat 61, the end that resets of valve rod 12 stretches into in the automatically controlled inner chamber and install valve rod resetting means, the tip of valve rod 12 is provided with automatically controlled inner chamber is split into the piston 64 of first oil chamber 62 and second oil chamber 63, valve rod resetting means is located in the first oil chamber 62, be provided with on the automatically controlled seat 61 with the fourth oil duct 65 of first oil chamber 62 intercommunication, install on the automatically controlled seat 61 with the first electro-hydraulic proportional valve 66 of fourth oil duct 65 intercommunication, still install on the automatically controlled seat 61 with the second electro-hydraulic proportional valve 67 of second oil chamber 63 intercommunication. The valve rod resetting device comprises an outer limiting block 71 in threaded connection with the end of the valve rod 12, an inner limiting table is arranged on the valve rod 12, two spring seats 72 are arranged on the valve rod 12 in a sleeved mode and located between the inner limiting table and the outer limiting block 71, the two spring seats 72 are arranged in opposite directions, and a resetting spring 73 is arranged on the valve rod 12 in a sleeved mode and located between the two spring seats 72.
The first electro-hydraulic proportional valve 66 and the second electro-hydraulic proportional valve 67 can position the valve rod 12 on a required station, for example, when the valve rod needs to move to the right, the fourth oil channel 65 is filled with oil when the first electro-hydraulic proportional valve 66 acts, the first electro-hydraulic proportional valve 66 controls the amplitude of the valve rod moving to the right by controlling the oil filling amount of the fourth oil channel, and similarly, when the valve rod 12 needs to move to the left, the second electro-hydraulic proportional valve 67 controls the amount of hydraulic oil entering the second oil cavity 63 to control the amplitude of the valve rod 12 moving to the left. The first electro-hydraulic proportional valve 66 and the second electro-hydraulic proportional valve 67 may also be remotely controlled by a computer.
An overload overflow valve 34 is installed between the working oil port a22 and the first oil passage 21, the overload overflow valve 34 is perpendicular to the first check valve 31, the front end of the valve body of the overload overflow valve 34 extends into the working oil port a22 on the outer side of the first check valve 31, the end of the first check valve 31 abuts against the front end of the valve body of the overload overflow valve 34, the overload overflow valve 34 can limit and clamp the first check valve 31, and the first check valve 31 can be automatically locked. When the working oil port A14 is overloaded, the overload overflow valve 34 can unload to avoid overload. When the power of using this multiple unit valve is less, when mechanical complexity is low, because this kind of use scene is difficult to produce the condition of transshipping, can not install overload overflow valve 34, the installation position installation sealing plug of overload overflow valve 34 can.
After the integral threaded cartridge mechanical pilot check valve is installed, the valve rod of the multi-way valve is easy to operate, the required operating force is small, and the valve rod cannot deform; no matter how large the load is, the opening force required by the multi-way valve is small, the abrasion of the valve rod is small, and the service life of the valve rod is prolonged.
When the hydraulic pressure at the working oil port a22 is too high and an overload occurs, the overload relief valve 34 on the left side communicated with the working oil port a22 is opened, and the oil flows into the first oil passage 21 through the overload relief valve 34 and then returns to the oil tank.
When the valve rod 12 is in the neutral position, both the first oil inlet 14 and the second oil inlet 13 can take oil, but because the pressure at the first oil inlet 14 is high, the oil flows in from the second oil inlet 13 and then returns to the oil tank.
The first electro-hydraulic proportional valve 66 is actuated, oil flows into the first oil chamber 62 through the fourth oil passage 65, the valve rod 12 is pushed to move rightwards, the return spring 73 is compressed, and oil in the second oil chamber 63 returns.
The second electro-hydraulic proportional valve 67 acts, and oil flows into the second oil chamber 63, pushes the valve rod 12 to move leftwards, compresses the return spring 73, and returns the oil in the first oil chamber 62 through the fourth oil passage 65.
As shown in fig. 3, when the valve rod 12 moves to the left, the second oil passage 23 is communicated with the third oil passage 25, the first oil passage 21 is communicated with the third oil chamber 27, the second oil inlet 13 is not communicated, oil flows in through the first oil inlet 14, the oil pressure at the first oil inlet 14 is continuously increased, the second check valve 32 is opened, the oil flows into the second oil passage 23, flows into the third oil passage 25 through the main valve hole, and then enters the working oil port B24. At this time, the first check valve 31 is opened by the left-hand movement of the valve rod 12, and the oil passes through the first check valve 31 via the working oil port a22 and then flows into the first oil passage 21 via the main valve hole to return.
As shown in fig. 4, when the valve rod 12 continues to move left, the second oil passage 23 and the third oil passage 25 are not communicated, the first oil passage 21 and the third oil chamber 27 are communicated, the third oil passage 25 and the fifth oil passage 26 are communicated, and at the floating position, the oil at the working oil port a22 returns to the oil tank through the first check valve 31 → the third oil chamber 27 → the main valve hole → the first oil passage 21, and the oil at the working oil port B24 returns to the oil tank through the third oil passage 25 → the main valve hole → the fifth oil passage 26.
As shown in fig. 5, when the valve rod 12 moves to the right, the third oil passage 25 and the fifth oil passage 26 are communicated, the third oil chamber 27 and the first oil passage 21 are not communicated, the second oil inlet 13 is opened, the first oil inlet 14 is closed, the oil flows into the third oil chamber 27 through the second oil inlet 13 and the hole of the valve rod 12, and as the pressure rises, the first check valve 31 is opened, and the oil flows into the working oil port a22 through the first check valve 31 and then flows out. At this time, the right high-pressure oil flows into the working oil port B24, then flows into the third oil passage 25, and flows into the fifth oil passage 26 to return.
According to the technical scheme, manual and electric composite control is adopted, two control modes can be used when the load is large or small, the electro-hydraulic control device is used for controlling the valve rod 12 to act when the load is large, the operation is simple, the labor intensity is reduced, the manual operation mode is reserved, the operation time can be shortened when the load is small, the electro-hydraulic proportional valve can still be operated when the electro-hydraulic proportional valve breaks down, and the reliability is improved.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The multi-way valve with the integral mechanical pilot check valve and the electro-hydraulic proportional control comprises a main valve body, wherein a main valve hole is formed in the main valve body, a valve rod is installed in the main valve hole, a second oil inlet, a first oil inlet, a working oil port A and a working oil port B are formed in the main valve body, a first oil duct located on one side of the first oil inlet is formed in the main valve body, a second oil duct, a third oil duct and a fifth oil duct are sequentially formed in the main valve body on the other side of the first oil inlet, the first oil duct, the second oil duct, the third oil duct and the fifth oil duct are all communicated with the main valve hole, the third oil duct is directly communicated with the working oil port B, and a third oil cavity which is provided with the valve rod and communicated with the main valve hole is formed in the main valve; the second oil inlet is communicated with the main valve hole and is positioned between the third oil cavity and the second oil channel; the method is characterized in that:
a first check valve is arranged between the working oil port A and the third oil cavity, a valve core pilot mechanical control device for controlling reverse hydraulic opening of the first check valve is arranged between the first check valve and the valve rod, a second check valve is arranged between the first oil inlet and the second oil duct, and a stop valve for plugging the fifth oil duct is arranged on the main valve body; and an electro-hydraulic control device which is connected with the reset end of the valve rod and is used for controlling the action of the valve rod is arranged on the main valve body.
2. The multiplex valve with integral mechanical pilot check valve and electro-hydraulic proportional control of claim 1, wherein: the valve core pilot mechanical control device comprises a valve core ejector rod, and one end of the valve core ejector rod extends into the valve body of the first one-way valve and abuts against the end part of the valve core of the first one-way valve; the valve rod is provided with an annular ejector rod groove which corresponds to the valve core ejector rod and extends radially, the other end of the valve core ejector rod extends into the ejector rod groove, the ejector rod groove comprises a deep groove area and a shallow groove area which respectively correspond to the closing state and the opening maintaining state of the first one-way valve, a conical surface used for driving the valve core ejector rod to act is arranged between the deep groove area and the shallow groove area, and the shallow groove area is arranged close to one side of the working oil port B.
3. The multiplex valve with integral mechanical pilot check valve and electro-hydraulic proportional control of claim 2, wherein: the valve body of the first one-way valve is provided with a guide sleeve matched with the valve core mandril, the valve body of the first one-way valve is provided with a first oil hole and a second oil hole which are positioned at two sides of the guide sleeve, and the first oil hole and the second oil hole are communicated with the valve cavity of the first one-way valve and the third oil cavity.
4. The multiplex valve with integral mechanical pilot check valve and electro-hydraulic proportional control of claim 2, wherein: the valve core of the first one-way valve is provided with an ejector rod centering hole, the ejector rod of the valve core is provided with a centering rod extending into the ejector rod centering hole, the outer diameter of the centering rod is smaller than the inner diameter of the ejector rod centering hole, a centering buffer device is arranged inside the valve core of the first one-way valve, and the centering buffer device is located between a return spring of the first one-way valve and the centering rod.
5. The multiplex valve with integral mechanical pilot check valve and electro-hydraulic proportional control of claim 4, wherein: the centering buffer device comprises a centering buffer seat fixedly installed in a valve core inner cavity of the first one-way valve, a centering buffer spring arranged facing the centering rod is installed on the centering buffer seat, a centering buffer ball clamped between the ejector rod centering hole and the centering buffer spring is installed in a valve core of the first one-way valve, and an oil passing hole communicated with the valve core inner cavity of the first one-way valve and a valve body inner cavity of the first one-way valve is formed in the centering buffer seat.
6. The multiplex valve with integral mechanical pilot check valve and electro-hydraulic proportional control of claim 1, wherein: the electro-hydraulic control device comprises an electric control seat, an electric control inner cavity is arranged in the electric control seat, a reset end of the valve rod extends into the electric control inner cavity and is provided with a valve rod reset device, the end portion of the valve rod is provided with a piston which is divided into a first oil cavity and a second oil cavity by the electric control inner cavity, the valve rod reset device is located in the first oil cavity, a fourth oil channel communicated with the first oil cavity is arranged on the electric control seat, a first electro-hydraulic proportional valve communicated with the fourth oil channel is arranged on the electric control seat, and a second electro-hydraulic proportional valve communicated with the second oil cavity is further arranged on the electric control seat.
7. The multiplex valve with integral mechanical pilot check valve and electro-hydraulic proportional control of claim 6, wherein: the valve rod resetting device comprises an outer limiting block connected to the end portion of the valve rod in a threaded mode, an inner limiting table is arranged on the valve rod, two spring seats and two reset springs are arranged on the valve rod in opposite directions, and the two reset springs are arranged between the two spring seats.
8. Multiple unit valve with integrated mechanical pilot check valve and electro-hydraulic proportional control according to any of claims 1 to 7, characterized in that: an overload overflow valve is installed between the working oil port A and the first oil duct, the overload overflow valve is perpendicular to the first one-way valve, the front end of the overload overflow valve extends into the working oil port A on the outer side of the first one-way valve, and the end of the first one-way valve abuts against the front end of the overload overflow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020142565.4U CN211901128U (en) | 2020-01-21 | 2020-01-21 | Multi-way valve with integral mechanical pilot check valve and electro-hydraulic proportional control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020142565.4U CN211901128U (en) | 2020-01-21 | 2020-01-21 | Multi-way valve with integral mechanical pilot check valve and electro-hydraulic proportional control |
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| Publication Number | Publication Date |
|---|---|
| CN211901128U true CN211901128U (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020142565.4U Active CN211901128U (en) | 2020-01-21 | 2020-01-21 | Multi-way valve with integral mechanical pilot check valve and electro-hydraulic proportional control |
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| CN (1) | CN211901128U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111156216A (en) * | 2020-01-21 | 2020-05-15 | 日照海卓液压有限公司 | Multi-way valve with integral mechanical pilot check valve and electro-hydraulic proportional control |
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2020
- 2020-01-21 CN CN202020142565.4U patent/CN211901128U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111156216A (en) * | 2020-01-21 | 2020-05-15 | 日照海卓液压有限公司 | Multi-way valve with integral mechanical pilot check valve and electro-hydraulic proportional control |
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