CN111056463A - Multi-way reversing valve group for extension and protection of supporting leg - Google Patents
Multi-way reversing valve group for extension and protection of supporting leg Download PDFInfo
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- CN111056463A CN111056463A CN201911367333.7A CN201911367333A CN111056463A CN 111056463 A CN111056463 A CN 111056463A CN 201911367333 A CN201911367333 A CN 201911367333A CN 111056463 A CN111056463 A CN 111056463A
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- oil
- valve plate
- control valve
- reversing valve
- leg
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/78—Supports, e.g. outriggers, for mobile cranes
- B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
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- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
Abstract
The invention discloses a multi-path reversing valve group for supporting leg extension and protection, which comprises an oil passing reversing valve plate and a plurality of supporting leg control valve plates, wherein the supporting leg control valve plates are arranged in parallel, the oil passing reversing valve plate is connected with the supporting leg control valve plates arranged in parallel in series, a reversing valve rod is arranged on the oil passing reversing valve plate, and a control valve rod is arranged on each supporting leg control valve plate. The invention can avoid the phenomenon that the landing leg retracts due to the misoperation of the control valve rod on the landing leg control valve plate or the misoperation of the reversing valve rod on the oil-passing reversing valve plate during operation, eliminates potential safety hazards and provides guarantee for safe operation.
Description
Technical Field
The invention relates to the technical field of hydraulic element manufacturing, in particular to a multi-way reversing valve group for supporting leg extension and protection, which is mainly used for supporting leg extension and protection on engineering machinery such as a truck crane, a crane and the like.
Background
The multi-way reversing valve is widely applied to hydraulic systems of engineering machinery such as a truck crane, a crane and the like, and is often used for controlling the extension and retraction of a horizontal supporting leg and a vertical supporting leg on the engineering machinery. Before the engineering machinery works, the horizontal supporting legs need to be firstly propped open, then the vertical supporting legs need to be put down so as to stably support the mechanical equipment, and whether the supporting legs are stable or not directly determines the safety during the working.
The multi-way reversing valve used for controlling the supporting legs at present is provided with a plurality of sub-valves, each sub-valve is provided with an oil port communicated with an oil cavity of an actuating mechanism for driving the supporting legs to act, and each sub-valve is also provided with a valve rod for switching an oil way.
However, the conventional multi-way reversing valve does not have a protection function, and the support legs are easily retracted due to misoperation of a valve rod on the sub-valve during operation, so that the mechanical equipment is inclined and further a safety accident occurs, and therefore the potential safety hazard needs to be eliminated.
Disclosure of Invention
The invention aims to provide a multi-way reversing valve group for telescopic and protective supporting legs, which solves the problem of retracting the supporting legs due to misoperation and improves the safety during operation.
Therefore, the invention adopts the following technical scheme:
a multichannel switching-over valves for landing leg is flexible and is protected, is equipped with oil inlet P, pressure delivery outlet P1 and oil return opening T on it, includes: the landing leg control valve plates are respectively provided with a first oil way for correspondingly communicating a rodless cavity of one horizontal landing leg driving execution mechanism, a second oil way for correspondingly communicating a rodless cavity of one vertical landing leg driving execution mechanism, a middle oil way and a control valve rod for switching the oil ways, wherein the control valve rod is provided with a horizontal landing leg action position communicated with the first oil way, a vertical landing leg action position communicated with the second oil way and a middle position at which the first oil way and the second oil way are blocked; and the oil passing reversing valve plate is provided with a third oil path for supplying oil to the rod cavities of all the horizontal supporting leg driving actuating mechanisms and the rod cavities of all the vertical supporting leg driving actuating mechanisms, a fourth oil path for returning oil to the rod cavities of all the horizontal supporting leg driving actuating mechanisms and the rod cavities of all the vertical supporting leg driving actuating mechanisms, a fifth oil path for supplying oil to the first oil path and the second oil path on all the supporting leg control valve plates, a sixth oil path, a middle oil path and a reversing valve rod, wherein the sixth oil path is communicated with the first oil path and the second oil path on all the supporting leg control valve plates and used for returning oil to the rodless cavities of all the horizontal supporting leg driving actuating mechanisms and the rodless cavities of all the vertical supporting leg driving actuating mechanisms, and the reversing valve rod is provided with an actuating mechanism extending position where the fifth oil path and the fourth oil path are communicated and an actuating mechanism contracting position where the third oil path and the sixth oil path are communicated, The middle positions of the third oil path, the fourth oil path, the fifth oil path and the sixth oil path are blocked, and when the reversing valve rod is in the middle position, the oil passing reversing valve plate and the middle oil paths on the plurality of supporting leg control valve plates form a middle oil path so as to communicate the oil inlet P with the pressure output port P1; when the reversing valve rod is located at the extending position of the actuating mechanism, the fourth oil path returns oil, and the fifth oil path enters oil; when the reversing valve rod is located at the contraction position of the actuating mechanism, the sixth oil path returns oil, and the third oil path enters oil.
Furthermore, the landing leg control valve plates are four, an oil port A used for correspondingly connecting a rodless cavity oil port of a horizontal landing leg driving execution mechanism is arranged on a first oil path of each landing leg control valve plate, an oil port B used for correspondingly connecting a rodless cavity oil port of a vertical landing leg driving execution mechanism is arranged on a second oil path of each landing leg control valve plate, and an oil port C used for being communicated with rod cavity oil ports of all the horizontal landing leg driving execution mechanisms and rod cavity oil ports of all the vertical landing leg driving execution mechanisms is arranged on the oil passing reversing valve plate.
Furthermore, the four landing leg control valve plates are composed of a first landing leg control valve plate, a second landing leg control valve plate, a third landing leg control valve plate and a fourth landing leg control valve plate which are sequentially arranged in parallel, the oil passing reversing valve plate is arranged between the second supporting leg control valve plate and the third supporting leg control valve plate, a first bridge valve plate is arranged between the oil passing reversing valve plate and the second support leg control valve plate, a second bridge valve plate is arranged between the oil passing reversing valve plate and the third support leg control valve plate, middle oil passages are arranged in the first bridge valve plate and the second bridge valve plate, wherein the first bridge valve plate is used for realizing the oil path communication between the oil passing reversing valve plate and the second supporting leg control valve plate, and the second bridge valve plate is used for realizing the oil path communication between the oil inlet P and the fifth oil path as well as the third oil path, and the second bridge valve plate is used for realizing the oil path communication between the oil passing reversing valve plate and the third landing leg control valve plate.
Furthermore, the first bridge valve plate is provided with a first oil duct communicated with the middle oil duct of the first bridge valve plate and used for connecting a third oil duct and a fifth oil duct, a second oil duct and a third oil duct which are communicated with each other, the second bridge valve plate is provided with a fourth oil duct and a fifth oil duct which are communicated with each other, each leg control valve plate is provided with a sixth oil duct, a seventh oil duct communicated with the oil port B and an eighth oil duct communicated with the oil port A, the sixth oil duct and the seventh oil duct form a second oil duct, the sixth oil duct and the eighth oil duct form a first oil duct, the sixth oil duct is communicated with the eighth oil duct and blocked from the seventh oil duct when the control valve rod is in the horizontal leg action position, the sixth oil duct is communicated with the seventh oil duct and blocked from the eighth oil duct when the control valve rod is in the vertical leg action position, when the control valve rod is in the middle position, the sixth oil duct is blocked from the seventh oil duct and the eighth oil duct, wherein the sixth oil duct in the first leg control valve plate, the sixth oil duct in the second leg control valve plate and the third oil duct are communicated, the sixth oil duct in the third leg control valve plate, the sixth oil duct in the fourth leg control valve plate and the fifth oil duct are communicated, the second oil duct is used for connecting a fifth oil path and a sixth oil path, and the fourth oil duct is used for connecting the fifth oil path and the sixth oil path.
The oil-passing reversing valve plate is provided with a ninth oil duct communicated with the first oil duct, a tenth oil duct communicated with the oil port C, an eleventh oil duct used for communicating the second oil duct with the fourth oil duct, a twelfth oil duct communicated with the eleventh oil duct and an oil return duct, wherein the ninth oil duct and the tenth oil duct form a third oil path, the tenth oil duct and the oil return duct form a fourth oil path, the ninth oil duct, the twelfth oil duct and the eleventh oil duct form a fifth oil path, the eleventh oil duct, the twelfth oil duct and the oil return duct form a sixth oil path, the ninth oil duct and the twelfth oil duct are communicated, the tenth oil duct and the oil return duct are communicated, the ninth oil duct and the tenth oil duct are blocked and the twelfth oil return duct are blocked when the reversing valve rod is in the contraction position of the actuating mechanism, and the ninth oil duct and the tenth oil duct are communicated, the tenth oil duct and the oil return duct are blocked when the reversing valve rod is in the contraction position of the actuating mechanism, The twelfth oil duct is communicated with the oil return duct, the ninth oil duct is blocked from the twelfth oil duct, the tenth oil duct is blocked from the oil return duct, when the reversing valve rod is in the middle position, the ninth oil duct, the tenth oil duct and the twelfth oil duct are blocked, and the oil return duct, the tenth oil duct and the twelfth oil duct are blocked.
Further, cross oily switching-over valve block, four all be equipped with the oil gallery that is used for the oil return in landing leg control valve block, the first valve block of crossing the bridge and the second valve block of crossing the bridge, wherein, cross the oil gallery in the oily switching-over valve block with oil gallery intercommunication, all oil gallery intercommunications form oil return channel, oil return port T with oil return channel intercommunication.
Further, the multi-way reversing valve group further comprises a pressure protection unit which is communicated with the oil inlet P and used for protecting the valve plate and the actuating mechanism.
Further, the pressure protection unit is a safety valve, an oil inlet of the safety valve is communicated with the oil inlet P, and an oil outlet of the safety valve is communicated with the oil return port T.
Furthermore, a first positioning steel ball, a first positioning column and a first elastic reset element for resetting the first positioning steel ball are arranged on the control valve rod, wherein three first positioning grooves corresponding to the horizontal supporting leg action position, the middle position and the vertical supporting leg action position of the control valve rod respectively are formed in the first positioning column, and the first positioning steel ball is positioned in the first positioning groove so as to realize the position locking of the control valve rod.
Furthermore, a second positioning steel ball, a second positioning column and a second elastic reset element for resetting the second positioning steel ball are arranged on the reversing valve rod, wherein three second positioning grooves which are respectively corresponding to the reversing valve rod and are positioned at the extending position, the middle position and the contracting position of the actuating mechanism are formed in the second positioning column, and the second positioning steel ball is positioned in the second positioning groove so as to realize the position locking of the reversing valve rod.
The invention has the following technical effects:
(1) the multi-way reversing valve group has a supporting leg protection function, and particularly, the multi-way reversing valve group is provided with two stages of valve plates, namely an oil passing reversing valve plate serving as a first-stage valve plate and a supporting leg control valve plate serving as a second-stage valve plate, wherein oil inlet and oil return in the supporting leg control valve plate need to pass through the oil passing reversing valve plate, namely, the oil passing reversing valve plate is operated firstly for the folding and unfolding actions of all the supporting legs, and the supporting legs can make corresponding actions only by operating the supporting leg control valve plate on the premise of operating the oil passing reversing valve plate, namely, the oil passing reversing valve plate and the supporting leg control valve plate must be operated successively for the supporting legs to make actions, therefore, the phenomenon that the supporting legs retract due to misoperation of the control valve rods on the supporting leg control valve plates or misoperation of the reversing valve rods on the oil passing reversing valve plates during operation can be avoided, potential safety hazards are eliminated, and safety operation is guaranteed.
(2) The reversing valve rod on the oil passing reversing valve plate is provided with the actuator extension position and the actuator contraction position, namely the landing leg control valve plate is operated to only extend the landing leg when the reversing valve rod is in the actuator extension position, and the landing leg is only contracted when the reversing valve rod is in the actuator contraction position.
(3) The reversing valve rod and the control valve rod are respectively provided with a positioning steel ball and a positioning groove for locking the position of the valve rod, so that the position of the valve rod can be kept stable under the condition of not applying external force, and the safety operation is further guaranteed.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 illustrates a top view of a multiple reversing valve block for leg telescoping and protection according to an embodiment of the present invention;
FIG. 2 illustrates a side view of a multi-directional valve block for leg retraction and protection according to an embodiment of the present invention;
FIG. 3 shows an internal structure of an oil passing reversing valve plate in a multi-way reversing valve group for supporting leg extension and protection according to an embodiment of the invention;
FIG. 4 shows an internal structure of a leg control valve plate in a multi-way reversing valve group for leg extension and protection according to an embodiment of the invention;
FIG. 5 shows a side view of a first bridge piece in a multiple-way reversing valve group for leg extension and protection according to an embodiment of the invention;
FIG. 6 shows a side view of a second bridge piece in the multiple-way reversing valve group for leg extension and protection according to an embodiment of the invention;
FIG. 7 shows a side view of a third bridge piece in the multiple-way reversing valve group for leg extension and protection according to an embodiment of the invention; and
fig. 8 is a hydraulic schematic diagram of a multiple reversing valve block for leg extension and protection according to an embodiment of the invention.
Description of the reference numerals
1a, controlling a valve plate by a first support leg; 1b, a second supporting leg control valve plate;
1c, controlling a valve plate by a third supporting leg; 1d, controlling a valve plate by a fourth supporting leg;
11. a control valve stem; 111. A first positioning steel ball;
112. a first positioning post; 113. A first elastic reset element;
114. a first positioning groove; 12. A sixth oil passage;
13. a seventh oil passage; 14. An eighth oil duct;
2. an oil passing reversing valve plate; 21. A reversing valve rod;
211. a second positioning steel ball; 212. A second positioning column;
213. a second elastic reset element; 214. A second positioning groove;
22. a ninth oil gallery; 23. A tenth oil gallery;
24. an eleventh oil passage; 25. A twelfth oil passage;
26. an oil return passage; 31. A first bridge valve plate;
311. a first oil passage; 312. A second oil passage;
313. a third oil passage; 32. A second bridge valve plate;
321. a fourth oil passage; 322. A fifth oil passage;
33. a third gap bridge valve plate; 4. An oil inlet and outlet valve plate;
5. returning oil; 100. A middle oil duct;
200. and an oil return hole.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 and 8, the multi-way reversing valve group for leg extension and protection of the invention comprises an oil passing reversing valve sheet 2 and four leg control valve sheets, wherein the four leg control valve sheets are arranged in parallel, the oil passing reversing valve sheet 2 is connected in series with the four leg control valve sheets arranged in parallel, and the four leg control valve sheets are composed of a first leg control valve sheet 1a, a second leg control valve sheet 1b, a third leg control valve sheet 1c and a fourth leg control valve sheet 1d which are sequentially arranged in parallel.
Each support leg control valve plate is provided with a first oil path used for correspondingly communicating a rodless cavity of one horizontal support leg driving execution mechanism, a second oil path used for correspondingly communicating a rodless cavity of one vertical support leg driving execution mechanism, a middle oil path 100 and a control valve rod 11 used for switching oil paths, and the control valve rod 11 is provided with a horizontal support leg action position where the first oil path is communicated, a vertical support leg action position where the second oil path is communicated and a middle position where the first oil path and the second oil path are blocked.
And the oil passing reversing valve plate 2 is provided with a third oil path for providing oil to the rod cavities of all the horizontal supporting leg driving executing mechanisms and the rod cavities of all the vertical supporting leg driving executing mechanisms, a fourth oil path for returning oil to the rod cavities of all the horizontal supporting leg driving executing mechanisms and the rod cavities of all the vertical supporting leg driving executing mechanisms, a fifth oil path for providing oil to the first oil path and the second oil path on all the supporting leg control valve plates, a sixth oil path which is communicated with the first oil path and the second oil path on all the supporting leg control valve plates and is used for returning oil to the rodless cavities of all the horizontal supporting leg driving executing mechanisms and the rodless cavities of all the vertical supporting leg driving executing mechanisms, a middle oil path 100 and a reversing valve rod 21.
The reversing valve rod 21 has an actuator extending position where the fifth oil path and the fourth oil path are communicated, an actuator retracting position where the third oil path and the sixth oil path are communicated, and a middle position where the third oil path, the fourth oil path, the fifth oil path and the sixth oil path are blocked.
As shown in fig. 1 and 2, the multi-way reversing valve set of the present invention is provided with an oil inlet P and a pressure output port P1 both communicated with the third oil path and the fifth oil path, and an oil return port T both communicated with the fourth oil path and the sixth oil path.
When the reversing valve rod 21 is in the middle position, the oil passing reversing valve plate 2 and the middle oil passages 100 on the four support leg control valve plates are communicated to form a middle oil passage, an oil inlet P and a pressure output port P1 are communicated through the middle oil passage, and oil enters from the oil inlet P and flows into other valve bodies through the pressure output port P1 to be output by pure power;
when the reversing valve rod 21 is located at the extending position of the actuating mechanism, the middle oil passage 100 in the oil passing reversing valve plate 2 is blocked, the middle oil passages are not communicated, the fourth oil passage returns oil, and the fifth oil passage takes oil;
when the reversing valve rod 21 is located at the contraction position of the actuating mechanism, the middle oil passage 100 in the oil passing reversing valve plate 2 is blocked, the middle oil passages are not communicated, the sixth oil passage returns oil, and the third oil passage enters oil.
When the reversing valve rod 21 is in the extending position of the actuating mechanism and the control valve rod 11 is in the action position of the horizontal support leg, the horizontal support leg extends; when the reversing valve rod 21 is in the extending position of the actuating mechanism and the control valve rod 11 is in the acting position of the vertical support leg, the vertical support leg extends; when the reversing valve rod 21 is in the actuator contraction position and the control valve rod 11 is in the horizontal leg action position, the horizontal leg is retracted; when the reversing valve rod 21 is in the actuator retracted position and the control valve rod 11 is in the vertical leg actuated position, the vertical leg is retracted.
The first oil path of each supporting leg control valve plate is provided with an oil port A which is correspondingly connected with a rodless cavity oil port of a horizontal supporting leg driving actuating mechanism, and the second oil path of each supporting leg control valve plate is provided with an oil port B which is correspondingly connected with a rodless cavity oil port of a vertical supporting leg driving actuating mechanism.
Specifically, two oil ports a1 and B1 are arranged on the first leg control valve plate 1a, two oil ports a2 and B2 are arranged on the second leg control valve plate 1B, two oil ports A3 and B3 are arranged on the third leg control valve plate 1c, and two oil ports a4 and B4 are arranged on the fourth leg control valve plate 1 d.
And the oil passing reversing valve plate 2 is provided with oil ports C which are communicated with the rod cavity oil ports of all the horizontal supporting leg driving actuating mechanisms and the rod cavity oil ports of all the vertical supporting leg driving actuating mechanisms, and the oil ports C are communicated with the third oil path and the fourth oil path.
As shown in fig. 1, the oil passing reversing valve sheet 2 is disposed between the second landing leg control valve sheet 1b and the third landing leg control valve sheet 1c, a first bridge valve sheet 31 is further disposed between the oil passing reversing valve sheet 2 and the second landing leg control valve sheet 1b, and a second bridge valve sheet 32 is further disposed between the oil passing reversing valve sheet 2 and the third landing leg control valve sheet 1 c. As shown in fig. 5 and 6, a middle oil passage 100 is provided in each of the first and second bridge valve plates 31 and 32 to form a middle oil passage.
The first bridge valve plate 31 is used for realizing the oil path communication between the oil passing reversing valve plate 2 and the second leg control valve plate 1b as well as the first leg control valve plate 1a, and the first bridge valve plate 31 is used for realizing the communication between the oil inlet P and a fifth oil path as well as a third oil path; and the second bridge valve plate 32 is used for realizing the oil path communication between the oil passing reversing valve plate 2 and the third support leg control valve plate 1c as well as the fourth support leg control valve plate 1 d.
Specifically, as shown in fig. 5, the first bridge valve plate 31 is provided therein with a first oil passage 311 communicated with the middle oil passage 100 of the first bridge valve plate 31 for connecting the third oil passage and the fifth oil passage, and a second oil passage 312 and a third oil passage 313 communicated with each other. As shown in fig. 6, the second bridge valve plate 32 is provided with a fourth oil passage 321 and a fifth oil passage 322 which are communicated with each other.
As shown in fig. 4, each of the leg control valve plates is provided with a sixth oil passage 12, a seventh oil passage 13 communicated with the oil port B, and an eighth oil passage 14 communicated with the oil port a, wherein the sixth oil passage 12 and the seventh oil passage 13 form a second oil passage, and the sixth oil passage 12 and the eighth oil passage 14 form a first oil passage.
When the control valve rod 11 is in the horizontal leg action position, the sixth oil passage 12 is communicated with the eighth oil passage 14, and the sixth oil passage 12 is blocked from the seventh oil passage 13; when the control valve rod 11 is in the vertical leg action position, the sixth oil passage 12 is communicated with the seventh oil passage 13, and the sixth oil passage 12 is blocked from the eighth oil passage 14; the sixth oil passage 12 is blocked from the seventh oil passage 13 and the eighth oil passage 14 when the control valve stem 11 is at the neutral position.
The second oil passage 312 and the fourth oil passage 321 are both used for connecting a fifth oil passage and a sixth oil passage, the sixth oil passage 12 in the first leg control valve plate 1a, the sixth oil passage 12 in the second leg control valve plate 1b and the third oil passage 313 are communicated, and the sixth oil passage 12 in the third leg control valve plate 1c, the sixth oil passage 12 in the fourth leg control valve plate 1d and the fifth oil passage 322 are communicated.
The fifth oil path and the sixth oil path are communicated with a third oil passage 313 through a second oil passage 312 so as to be communicated with a sixth oil passage 12 in the first leg control valve plate 1a and the second leg control valve plate 1 b; the fifth oil passage and the sixth oil passage are communicated with the fifth oil passage 322 through the fourth oil passage 321 so as to be communicated with the sixth oil passage 12 in the third leg control valve plate 1c and the fourth leg control valve plate 1 d.
Further, as shown in fig. 3 to 6, a ninth oil passage 22 communicated with the first oil passage 311, a tenth oil passage 23 communicated with the oil port C, an eleventh oil passage 24 for communicating the second oil passage 312 and the fourth oil passage 321, a twelfth oil passage 25 communicated with the eleventh oil passage 24, and an oil return passage 26 are provided in the oil passing reversing valve plate 2.
The ninth oil passage 22 and the tenth oil passage 23 form a third oil passage, the tenth oil passage 23 and the oil return passage 26 form a fourth oil passage, the ninth oil passage 22, the twelfth oil passage 25 and the eleventh oil passage 24 form a fifth oil passage, and the eleventh oil passage 24, the twelfth oil passage 25 and the oil return passage 26 form a sixth oil passage.
When the reversing valve rod 21 is in the extending position of the actuating mechanism, the ninth oil channel 22 is communicated with the twelfth oil channel 25, the tenth oil channel 23 is communicated with the oil return channel 26, the ninth oil channel 22 is blocked from the tenth oil channel 23, and the twelfth oil channel 25 is blocked from the oil return channel 26;
when the reversing valve rod 21 is in the contraction position of the actuating mechanism, the ninth oil passage 22 is communicated with the tenth oil passage 23, the twelfth oil passage 25 is communicated with the oil return passage 26, the ninth oil passage 22 is blocked from the twelfth oil passage 25, and the tenth oil passage 23 is blocked from the oil return passage 26;
when the reversing valve rod 21 is in the middle position, the ninth oil passage 22 and the tenth oil passage 23 and the twelfth oil passage 25 are blocked, and the oil return passage 26 and the tenth oil passage 23 and the twelfth oil passage 25 are blocked.
From the above, the multi-way reversing valve group of the invention has a landing leg protection function, and specifically, the multi-way reversing valve group of the invention is provided with two stages of valve plates, namely, an oil passing reversing valve plate as a first stage valve plate and a landing leg control valve plate as a second stage valve plate, wherein oil inlet and oil return in the landing leg control valve plate need to pass through the oil passing reversing valve plate, namely, the oil passing reversing valve plate is operated firstly for retraction and release actions of all landing legs, only under the premise of operating the oil passing reversing valve plate, the landing leg control valve plate is operated to enable the landing legs to make corresponding actions, namely, the oil passing reversing valve plate and the landing leg control valve plate need to be operated successively for the landing legs to make actions, so that the phenomenon that the landing legs retract due to misoperation of a control valve rod on the landing leg control valve plate or misoperation of a reversing valve rod on the oil, and the safety operation is guaranteed.
The reversing valve rod on the oil passing reversing valve plate is provided with the actuator extension position and the actuator contraction position, namely the landing leg control valve plate is operated to only extend the landing leg when the reversing valve rod is in the actuator extension position, and the landing leg is only contracted when the reversing valve rod is in the actuator contraction position.
As shown in fig. 1 to 6, oil return holes 200 for returning oil are provided in the oil-passing reversing valve plate 2, four landing leg control valve plates, the first bridge valve plate 31 and the second bridge valve plate 32, wherein the oil return holes 200 in the oil-passing reversing valve plate 2 are communicated with the oil return channel 26, all the oil return holes 200 are communicated to form an oil return channel, and the oil return port T is communicated with the oil return channel to return oil.
As shown in fig. 8, the multi-way reversing valve set of the present invention further includes a pressure protection unit communicated with the oil inlet P for protecting the valve sheet and the actuator, wherein the pressure protection unit is a safety valve, an oil inlet of the safety valve is communicated with the oil inlet P, an oil outlet of the safety valve is communicated with the oil return port T, and when the oil pressure exceeds a set pressure value of the safety valve, the oil inlet of the safety valve is communicated with the oil outlet to achieve a protection function.
As shown in fig. 1 to 7, the multi-way reversing valve set further includes an oil inlet and outlet valve sheet 4 and a third bridge valve sheet 33 disposed adjacent to the first leg control valve sheet 1a, wherein the third bridge valve sheet 33 is located between the oil inlet and outlet valve sheet 4 and the first leg control valve sheet 1a, the third bridge valve sheet 33 is also provided with a middle oil passage 100 and an oil return hole 200, the sixth oil passage 12 in the first leg control valve sheet 1a is sealed by the third bridge valve sheet 33, and the safety valve, the oil inlet P, and the oil return port T are disposed on the oil inlet and outlet valve sheet 4.
Referring to fig. 1 to 4, the multi-way reversing valve set of the present invention further includes an oil return body 5 for returning oil, and in addition, the oil return body 5 can also close the sixth oil passage 12 in the fourth leg control valve plate 1 d.
The oil inlet and outlet valve plate 4, the third bridge passing valve plate 33, the first support leg control valve plate 1a, the second support leg control valve plate 1b, the first bridge passing valve plate 31, the oil passing reversing valve plate 2, the second bridge passing valve plate 32, the third support leg control valve plate 1c, the fourth support leg control valve plate 1d and the oil return body 5 are fixedly connected together through a bolt assembly to form a multi-way reversing valve group.
As shown in fig. 4, a first positioning steel ball 111, a first positioning column 112, and a first elastic reset element 113 for resetting the first positioning steel ball 111 are disposed on the control valve rod 11, wherein the first positioning column 112 has three first positioning grooves 114 corresponding to the horizontal leg action position, the middle position, and the vertical leg action position of the control valve rod 11, respectively, and the first positioning steel ball 111 is disposed in the first positioning groove 114 to lock the position of the control valve rod 11.
As shown in fig. 3, a second positioning steel ball 211, a second positioning column 212, and a second elastic reset element 213 for resetting the second positioning steel ball 211 are disposed on the reversing valve rod 21, wherein the second positioning column 212 has three second positioning grooves 214 respectively corresponding to the reversing valve rod 21 in the actuator extended position, the actuator intermediate position, and the actuator retracted position, and the second positioning steel ball 211 is disposed in the second positioning groove 214 to achieve position locking of the reversing valve rod 21.
The first elastic reset element 113 and the second elastic reset element 213 both comprise a spring and a top plate, and the top plate is provided with an inclined surface for pressing the steel ball.
Above-mentioned switching-over valve rod and control valve rod all are equipped with the location steel ball and the constant head tank that are used for valve rod position locking to make can keep the position stability of valve rod under the condition of not exerting external force, this has further ensured safe operation.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a multichannel switching-over valves for landing leg is flexible and protection is equipped with oil inlet P, pressure delivery outlet P1 and oil return opening T on it, its characterized in that includes:
each support leg control valve plate is provided with a first oil way used for correspondingly communicating a rodless cavity of one horizontal support leg driving execution mechanism, a second oil way used for correspondingly communicating a rodless cavity of one vertical support leg driving execution mechanism, a middle oil way (100) and a control valve rod (11) used for switching the oil way, wherein the control valve rod (11) is provided with a horizontal support leg action position communicated with the first oil way, a vertical support leg action position communicated with the second oil way and a middle position at which the first oil way and the second oil way are blocked; and
the oil passing reversing valve plate (2) is provided with a third oil path for supplying oil to the rod chambers of all the horizontal supporting leg driving actuating mechanisms and the rod chambers of all the vertical supporting leg driving actuating mechanisms, a fourth oil path for returning oil to the rod chambers of all the horizontal supporting leg driving actuating mechanisms and the rod chambers of all the vertical supporting leg driving actuating mechanisms, a fifth oil path for supplying oil to the first oil path and the second oil path on all the supporting leg control valve plates, a sixth oil path, a middle oil path (100) and a reversing valve rod (21), wherein the sixth oil path is communicated with the first oil path and the second oil path on all the supporting leg control valve plates and used for returning oil to the rodless chambers of all the horizontal supporting leg driving actuating mechanisms and the rodless chambers of all the vertical supporting leg driving actuating mechanisms,
wherein the reversing valve rod (21) is provided with an actuating mechanism extending position where a fifth oil path and a fourth oil path are communicated, an actuating mechanism contracting position where a third oil path and a sixth oil path are communicated, and a middle position where the third oil path, the fourth oil path, the fifth oil path and the sixth oil path are blocked,
when the reversing valve rod (21) is in the middle position, the oil passing reversing valve plate (2) and the middle oil passages (100) on the plurality of supporting leg control valve plates form a middle oil path so as to communicate the oil inlet P and the pressure outlet P1; when the reversing valve rod (21) is located at the extending position of the actuating mechanism, the fourth oil path returns oil, and the fifth oil path enters oil; when the reversing valve rod (21) is located at the contraction position of the actuating mechanism, the sixth oil path returns oil, and the third oil path enters oil.
2. The multi-way reversing valve group for leg extension and protection according to claim 1, wherein the number of the leg control valve plates is four, a first oil passage of each leg control valve plate is provided with an oil port A for correspondingly connecting with a rodless cavity oil port of a horizontal leg driving actuator, a second oil passage of each leg control valve plate is provided with an oil port B for correspondingly connecting with a rodless cavity oil port of a vertical leg driving actuator, and the oil passing reversing valve plate (2) is provided with oil ports C for communicating with rod cavity oil ports of all the horizontal leg driving actuators and rod cavity oil ports of all the vertical leg driving actuators.
3. The multi-way reversing valve group for leg extension and protection according to claim 2, wherein the four leg control valve plates are composed of a first leg control valve plate (1a), a second leg control valve plate (1b), a third leg control valve plate (1c) and a fourth leg control valve plate (1d) which are sequentially arranged in parallel, the oil passing reversing valve plate (2) is arranged between the second leg control valve plate (1b) and the third leg control valve plate (1c), a first bridging valve plate (31) is arranged between the oil passing reversing valve plate (2) and the second leg control valve plate (1b), a second bridging valve plate (32) is arranged between the oil passing reversing valve plate (2) and the third leg control valve plate (1c),
the first bridge valve plate (31) is used for achieving oil path communication between the oil passing reversing valve plate (2) and the second supporting leg control valve plate (1b), and is also used for achieving communication between the oil inlet P and a fifth oil path and a third oil path, and the second bridge valve plate (32) is used for achieving oil path communication between the oil passing reversing valve plate (2) and the third supporting leg control valve plate (1 c).
4. The multiway reversing valve group for telescopic and protective of support legs according to any one of claims 1 to 3, further comprising a pressure protection unit communicated with the oil inlet P and used for protecting a valve plate and an actuator.
5. The multiple reversing valve bank for telescopic and protective of support legs according to claim 4, wherein the pressure protection unit is a safety valve, an oil inlet of the safety valve is communicated with the oil inlet P, and an oil outlet of the safety valve is communicated with the oil return T.
6. The multiway reversing valve group for leg extension and protection according to any one of claims 1 to 3, wherein a first positioning steel ball (111), a first positioning column (112), and a first elastic reset element (113) for resetting the first positioning steel ball (111) are arranged on the control valve rod (11), wherein the first positioning column (112) is provided with three first positioning grooves (114) corresponding to the control valve rod (11) in a horizontal leg action position, a middle position, and a vertical leg action position, respectively, and the first positioning steel ball (111) is located in the first positioning groove (114) to achieve position locking of the control valve rod (11).
7. The multi-way reversing valve group for telescopic and protective supporting legs according to any one of claims 1 to 3, wherein a second positioning steel ball (211), a second positioning column (212) and a second elastic reset element (213) for resetting the second positioning steel ball (211) are arranged on the reversing valve rod (21), wherein the second positioning column (212) is provided with three second positioning grooves (214) corresponding to the reversing valve rod (21) in the actuator extending position, the actuator middle position and the actuator retracting position, respectively, and the second positioning steel ball (211) is located in the second positioning groove (214) to realize the position locking of the reversing valve rod (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911367333.7A CN111056463A (en) | 2019-12-26 | 2019-12-26 | Multi-way reversing valve group for extension and protection of supporting leg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911367333.7A CN111056463A (en) | 2019-12-26 | 2019-12-26 | Multi-way reversing valve group for extension and protection of supporting leg |
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| Publication Number | Publication Date |
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| CN111056463A true CN111056463A (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911367333.7A Pending CN111056463A (en) | 2019-12-26 | 2019-12-26 | Multi-way reversing valve group for extension and protection of supporting leg |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045885A (en) * | 2022-08-16 | 2022-09-13 | 河北尚泰合力液压元件有限公司 | Electro-hydraulic multi-way valve |
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2019
- 2019-12-26 CN CN201911367333.7A patent/CN111056463A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045885A (en) * | 2022-08-16 | 2022-09-13 | 河北尚泰合力液压元件有限公司 | Electro-hydraulic multi-way valve |
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