CN210176409U - Connecting body leveling hydraulic system of crank arm overhead working truck - Google Patents
Connecting body leveling hydraulic system of crank arm overhead working truck Download PDFInfo
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- CN210176409U CN210176409U CN201920482536.XU CN201920482536U CN210176409U CN 210176409 U CN210176409 U CN 210176409U CN 201920482536 U CN201920482536 U CN 201920482536U CN 210176409 U CN210176409 U CN 210176409U
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Abstract
The utility model discloses a bent arm high altitude construction car connector leveling hydraulic system, hydraulic system includes the electromagnetic directional valve, roll over arm change width of cloth hydro-cylinder and connector leveling hydro-cylinder, roll over the rodless chamber of arm change width of cloth hydro-cylinder and the pole chamber that has of connector leveling hydro-cylinder and connect the electromagnetic directional valve through first pipeline and second pipeline, roll over the rodless chamber that has the pole chamber of arm change width of cloth hydro-cylinder and pass through third tube coupling connector leveling hydro-cylinder, be provided with automatically controlled valve device between second pipeline and the third pipeline, the third pipeline sets up back oil pipe way connection oil tank. The hydraulic system simplifies debugging procedures, saves labor cost and improves production efficiency.
Description
Technical Field
The utility model belongs to the technical field of high altitude construction equipment, concretely relates to curved boom high altitude construction car connector leveling hydraulic system.
Background
When the crank arm type high-altitude operation vehicle (shown in figure 1) acts to change the amplitude of the upper and lower parts of the folding arm 17, the synchronous linkage of the two oil cylinders is realized by the closed cavity formed by communicating the rod cavity of the folding arm amplitude-changing oil cylinder 3 with the rodless cavity of the connector leveling oil cylinder 4, so that the working platform 20 and the connector 18 between the folding arm 17 and the main arm 19 are always in a translation state.
In the prior art, the hydraulic systems of the two oil cylinders have the structure shown in fig. 2:
the pressure oil is connected with a port P of the electromagnetic directional valve 1, a port A of the electromagnetic directional valve 1 is connected with a port V1 of a first bidirectional balance valve 2, a port C1 of the first bidirectional balance valve 2 is connected with a rodless cavity of a folding arm amplitude cylinder 3, a rod cavity of the folding arm amplitude cylinder 3 is connected with a port C2 of the first bidirectional balance valve 2, a port V2 of the first bidirectional balance valve 2 is simultaneously connected with a port V1 of a second bidirectional balance valve 5, a port T of an overflow valve 6 and a port P of a manual directional valve 7, a port C1 of the second bidirectional balance valve 5 is connected with a rodless cavity of a leveling connector cylinder 4, a rod cavity of the connector leveling cylinder 4 is connected with a port C2 of the second bidirectional balance valve 5, a port V2 of the second bidirectional balance valve 5 is simultaneously connected with a port B of the electromagnetic directional valve 1, a port PIL1 of the first bidirectional balance valve 2 and a port P of the overflow valve 6, and a port T2 of the manual directional valve 7 is connected with a port T1 of the electromagnetic directional valve, the port A1 of the electromagnetic directional valve 1 is simultaneously connected with the port PIL2 of the first bidirectional balance valve 2 and the port PIL3 of the second bidirectional balance valve 5, and the port T of the electromagnetic directional valve 1 is directly connected with an oil tank.
With reference to the attached figure 2, a rod cavity of the arm folding luffing cylinder 3 is connected with a rodless cavity of the connector leveling cylinder 4 to form a sealed cavity. When YV1 is electrified, pressure oil enters a rodless cavity of the folding arm amplitude-changing oil cylinder 3 through the electromagnetic directional valve 1 and the first bidirectional balance valve 2, the first bidirectional balance valve 2 and the second bidirectional balance valve 5 are opened through the control oil ways PIL2 and PIL3, and when the folding arm amplitude-changing oil cylinder 3 extends out, oil extruded from a rod cavity of the folding arm amplitude-changing oil cylinder enters a rodless cavity of the connecting body leveling oil cylinder 4, so that the connecting body leveling oil cylinder 4 extends out, and synchronous linkage is realized. Similarly, when the YV2 is electrified, the connecting body leveling cylinder 4 retracts, and the oil extruded from the rodless cavity of the connecting body leveling cylinder enters the rod cavity of the folding arm variable amplitude cylinder 3, so that the folding arm variable amplitude cylinder 3 retracts.
Before the synchronous linkage of the two oil cylinders is realized, the set value of an overflow valve 6 in the attached figure 2 and a manual reversing valve 7 which is repeatedly operated are required to be adjusted so that the arm folding amplitude-changing oil cylinder 3 and the connector leveling oil cylinder 4 can be independently operated, and then the oil charging and the air discharging of a sealed cavity between a rod cavity of the arm folding amplitude-changing oil cylinder 3 and a rodless cavity of the connector leveling oil cylinder 4 are completed. The following problems exist in the actual operation process:
1) the set value of the overflow valve 6 needs to be adjusted repeatedly in the exhaust process, the operation difficulty is high, and the gas in the closed cavity is difficult to be completely exhausted;
2) after the equipment is stopped and placed for a long time, along with the reduction of the temperature of oil in the closed cavity of the arm-folding amplitude-changing oil cylinder 3 and the connector leveling oil cylinder 4, the oil volume shrinks (the variation is related to the expansion coefficient and the temperature difference value of the hydraulic oil) to form partial vacuum, which directly results in that:
a. in a shutdown state, when the working platform 20 is loaded (the boom gravity center moves towards the working platform), the arm folding luffing cylinder 3 can be suddenly pulled out, and great damage can be caused to operators and equipment;
b. when the machine is started again and the folding arm 17 is actuated to change the amplitude, the connector leveling cylinder 4 is delayed in stretching, so that the working platform 20 is inclined, and certain potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a can effectively adjust connector balanced state's hydraulic system.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a connector leveling hydraulic system of a crank arm overhead working truck, which comprises an electromagnetic directional valve, a folding arm amplitude-changing oil cylinder and a connector leveling oil cylinder, the electromagnetic directional valve is provided with an oil inlet P, a working oil port A, a working oil port B and an oil return port T, the oil inlet P is connected with pressure oil, the oil return port T is connected with an oil tank, the working oil port A is connected with a rodless cavity of a folding arm variable amplitude oil cylinder through a first pipeline, the working oil port B is connected with a rod cavity of the connector leveling oil cylinder through a second pipeline, the rod cavity of the folding arm amplitude-changing oil cylinder is connected with a rodless cavity of the connector leveling oil cylinder through a third pipeline, an oil return branch is arranged between the second pipeline and the third pipeline, an electric control valve device is arranged on the oil return branch, the third pipeline is provided with an oil return pipeline connected with an oil tank, and the oil return pipeline is provided with a second electromagnetic directional valve.
Optionally, the electrically controlled valve device is provided with a pressure reducing valve and a first electromagnetic directional valve.
Optionally, the set pressure value of the pressure reducing valve is 20 bar.
Optionally, the hydraulic control system further comprises a first bidirectional balance valve, the first bidirectional balance valve comprises a rod-free cavity balance valve of the variable-amplitude arm folding cylinder and a rod-cavity balance valve of the variable-amplitude arm folding cylinder, the rod-free cavity balance valve of the variable-amplitude arm folding cylinder is arranged on the first pipeline, the rod-cavity balance valve of the variable-amplitude arm folding cylinder is arranged on the third pipeline and close to the variable-amplitude arm folding cylinder, the rod-free cavity balance valve of the variable-amplitude arm folding cylinder is provided with a first oil inlet and outlet port V1, a first oil inlet and outlet port C1 and a control oil port PIL1 for controlling the reverse opening of the rod-free cavity balance valve of the variable-amplitude arm folding cylinder, the rod-cavity balance valve of the variable-amplitude arm folding cylinder is provided with a first oil inlet and outlet port V2, a first oil inlet and outlet port C2 and a control oil port 387l 2 for controlling the reverse opening of the rod-cavity balance valve of the variable-amplitude arm folding cylinder, the first oil inlet and outlet port V389, the first oil inlet/outlet port C1 is communicated with a rodless cavity of the luffing jib oil cylinder, a rod cavity of the luffing jib oil cylinder is communicated with the first oil inlet/outlet port C2, the control oil port PIL1 is communicated with the working oil port B, and the first oil inlet/outlet port V2 is connected with the rodless cavity of the connecting body leveling oil cylinder through a third pipeline.
Optionally, the hydraulic control system further comprises a second bidirectional balance valve, the second bidirectional balance valve comprises a connector leveling cylinder rodless cavity balance valve and a connector leveling cylinder rod cavity balance valve, the connector leveling cylinder rod cavity balance valve is arranged on the second pipeline, the connector leveling cylinder rodless cavity balance valve is arranged on the third pipeline and close to the connector leveling cylinder, a second oil inlet and outlet port V1 and a second oil inlet and outlet port C1 are arranged on the connector leveling cylinder rodless cavity balance valve, a second oil inlet and outlet port V2 and a second oil inlet and outlet port C2 and a control oil port PIL3 for controlling the connector leveling cylinder rod cavity balance valve to be reversely opened are arranged on the connector leveling cylinder rod cavity balance valve, the control oil port PIL3 is communicated with the working oil port a, the second oil inlet and outlet port C1 is communicated with the rodless cavity of the connector leveling cylinder, the rod cavity of the connector leveling cylinder is communicated with the second oil inlet and outlet port C2, the second oil inlet and outlet port V2 is communicated with the working port B, the second oil inlet and outlet port V1 is communicated with the first oil inlet and outlet port V2 through a third pipeline, and a connection point of the oil return branch is located between the second oil inlet and outlet port V1 and the first oil inlet and outlet port V2.
The utility model has the advantages that: according to the hydraulic system, the overflow valve does not need to be manually and frequently adjusted in the exhaust process of the sealed cavity formed by the rodless cavity of the connector leveling oil cylinder and the rod cavity of the arm folding variable amplitude oil cylinder, the exhaust can be realized only by continuously switching the second electromagnetic valve, the oil filling of the sealed cavity is realized by switching the electric control valve device, the debugging process is simplified, the labor cost is saved, and the production efficiency is improved.
Drawings
The invention will be further described with reference to the following figures and examples:
FIG. 1 is a schematic structural view of a curved arm aerial cage;
FIG. 2 is a schematic diagram of a conventional hydraulic system;
FIG. 3 is a schematic diagram of a hydraulic system according to the present invention;
FIG. 4 is a logic block diagram of the hydraulic system implementing link leveling.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Referring to fig. 3, on the one hand, the utility model provides a connector leveling hydraulic system of a crank arm overhead working truck, comprising an electromagnetic directional valve 1, a folding arm luffing cylinder 3 and a connector leveling cylinder 4, wherein the electromagnetic directional valve 1 has an oil inlet P, a working oil port a, a working oil port B and an oil return port T, the oil inlet P is connected with pressure oil, and the oil return port T is connected with an oil tank, the working oil port a is connected with a rodless cavity of the folding arm luffing cylinder 3 through a first pipeline 11, the working oil port B is connected with a rod cavity of the connector leveling cylinder 4 through a second pipeline 12, the rod cavity of the folding arm luffing cylinder 3 is connected with a rodless cavity of the connector leveling cylinder 4 through a third pipeline 13, which is characterized in that an oil return branch 14 is arranged between the second pipeline 12 and the third pipeline 13, an electric control valve device is arranged on the oil return branch 14, the third pipeline 13 is provided with an oil return pipeline 15, and a second electromagnetic directional valve 10 is arranged on the oil return pipeline 15.
The electrically controlled valve device is provided with a pressure reducing valve 8 and a first electromagnetic directional valve 9, and the set pressure value of the pressure reducing valve 8 is preferably set to 20 bar.
The hydraulic system further comprises a first bidirectional balancing valve 2 and a second bidirectional balancing valve 5.
The first bidirectional balance valve 2 comprises a rodless cavity balance valve of the folding arm variable-amplitude oil cylinder and a rodless cavity balance valve of the folding arm variable-amplitude oil cylinder, the rodless cavity balance valve of the folding arm variable-amplitude oil cylinder is arranged on the first pipeline 11, and the rodless cavity balance valve of the folding arm variable-amplitude oil cylinder is arranged on the third pipeline 13 and close to the folding arm variable-amplitude oil cylinder 3.
The boom luffing cylinder rodless cavity balance valve is provided with a first oil inlet and outlet port V1, a first oil inlet and outlet port C1 and a control oil port PIL1 for controlling the boom luffing cylinder rodless cavity balance valve to be reversely opened, the boom luffing cylinder rodless cavity balance valve is provided with a first oil inlet and outlet port V2, a first oil inlet and outlet port C2 and a control oil port PIL2 for controlling the boom luffing cylinder rodless cavity balance valve to be reversely opened, the first oil inlet and outlet port V1 and the control oil port PIL2 are respectively communicated with a working oil port A, the first oil inlet and outlet port C1 is communicated with a rodless cavity of the boom luffing cylinder 3, a rodless cavity of the boom luffing cylinder 3 is communicated with the first oil inlet and outlet port C2, the control oil port PIL1 is communicated with a working oil port B, and the first oil inlet and outlet port V2 is connected with the rodless cavity of the connecting body cylinder 4 through a third pipeline 13.
The second bidirectional balance valve 5 comprises a connector leveling cylinder rodless cavity balance valve and a connector leveling cylinder rodless cavity balance valve, the connector leveling cylinder rodless cavity balance valve is arranged on the second pipeline 12, and the connector leveling cylinder rodless cavity balance valve is arranged at a position, close to the connector leveling cylinder 4, on the third pipeline 13.
Be equipped with second business turn over hydraulic fluid port V1, second business turn over hydraulic fluid port C1 on the balanced valve of connector leveling cylinder rodless chamber, connector leveling cylinder has the control hydraulic fluid port PIL3 that is equipped with second business turn over hydraulic fluid port V2, second business turn over hydraulic fluid port C2 on the balanced valve of rod chamber and is used for controlling connector leveling cylinder rodless chamber balance valve and opens in reverse, control hydraulic fluid port PIL3 and working fluid port A intercommunication, second business turn over hydraulic fluid port C1 and connector leveling cylinder 4 rodless chamber intercommunication, connector leveling cylinder 4 have the pole chamber and second business turn over hydraulic fluid port C2 intercommunication, second business turn over hydraulic fluid port V2 and working fluid port B intercommunication, second business turn over hydraulic fluid port V1 and first business turn over hydraulic fluid port V2 are through third pipeline 13 intercommunication, the tie point of oil return branch road 14 is located between second business turn over hydraulic fluid port V1 and the first business turn over hydraulic fluid port V2. And the second oil inlet/outlet port V2 is communicated with a control port of the rodless cavity balance valve of the leveling oil cylinder of the connecting body through an internal flow pipeline.
Wherein the rodless cavity of the connector leveling cylinder 4 and the rod cavity of the folding arm amplitude-changing cylinder 3 form a closed cavity through a third pipeline 13.
The push-out mechanism of the connector leveling cylinder 4 and the folding arm amplitude-variable cylinder 3 is as follows:
the pressure oil enters a rodless cavity of the variable amplitude folding arm cylinder 3 from a working oil port A through a first pipeline 11, a first oil inlet/outlet port V1 and a first oil inlet/outlet port C1, the variable amplitude folding arm cylinder 3 is pushed out, the pressure oil enters a control oil port PIL2 from the working oil port A at the same time, a rod cavity balance valve of the variable amplitude folding arm cylinder is controlled to be opened reversely, so that the hydraulic oil in the rod cavity of the variable amplitude folding arm cylinder 3 enters a rodless cavity of the connecting body leveling cylinder 4 through a first oil inlet/outlet port C2, a first oil inlet/outlet port V2, a third pipeline 13, a second oil inlet/outlet port V1 and a second oil inlet/outlet port C1, the connecting body leveling cylinder 4 is pushed out, the pressure oil enters a control oil port PIL3 from the working oil port A at the same time, the rod cavity balance valve of the leveling cylinder is controlled to be opened reversely, so that the hydraulic oil in the rod cavity of the connecting body leveling cylinder 4 enters a connecting body leveling cylinder through a second oil inlet/outlet port C2, a, thereby realizing the synchronous push-out action of the connecting body leveling cylinder 4 and the folding arm amplitude-variable cylinder 3.
The retraction mechanism of the connecting body leveling cylinder 4 and the folding arm luffing cylinder 3 is as follows:
the pressure oil enters the rod cavity of the connecting body leveling cylinder 4 from the working oil port B through the second pipeline 12, the second oil inlet/outlet port V2 and the second oil inlet/outlet port C2 to push the connecting body leveling cylinder 4 to retract, meanwhile, pressure oil enters the rodless cavity balance valve of the connector leveling oil cylinder through the inner flow pipeline to control the reverse opening of the connector leveling oil cylinder, so that the hydraulic oil in the rodless cavity of the connector leveling cylinder 4 enters the rod cavity of the folding arm variable amplitude cylinder 3 through the second oil inlet/outlet port C1, the second oil inlet/outlet port V1, the third pipeline 13, the first oil inlet/outlet port V2 and the first oil inlet/outlet port C2 to push the folding arm variable amplitude cylinder 3 to retract, meanwhile, pressure oil enters the control oil port PIL1 from the working oil port B to control the rodless cavity balance valve of the luffing jib oil cylinder to be opened reversely, and hydraulic oil in the rodless cavity of the luffing jib oil cylinder 3 enters the oil tank through the first oil inlet/outlet port C1, the first oil inlet/outlet port V1, the first pipeline 11, the working oil port A and the oil return port T of the electromagnetic directional valve 1.
The exhaust mechanism for exhausting the rodless cavity of the connector leveling cylinder 4 and the rod cavity of the arm folding variable-amplitude cylinder 3 through the sealed cavity formed by the third pipeline 13 is as follows:
the rodless cavity of the connecting body leveling oil cylinder 4 and the rod cavity of the folding arm amplitude-changing oil cylinder 3 are controlled to be communicated with the oil tank one by one for oil discharge by adjusting the second electromagnetic directional valve 10, and then the closed cavity is communicated with the working oil port B for oil charge through the oil return branch 14 and the second pipeline 13 through the pressure reducing valve 8 and the first electromagnetic directional valve 9, so that the gas is completely discharged by the reciprocating action.
Further preferably, the first electromagnetic directional valve 9 and the second electromagnetic directional valve 10 both adopt an electromagnetic valve structure with a manual adjusting function.
In summary, in the hydraulic system in this embodiment, in the process of exhausting the sealed cavity formed by the rodless cavity of the connector leveling cylinder 4 and the rod cavity of the arm folding luffing cylinder 3, the overflow valve 6 and the manual reversing valve 7 in the conventional structure shown in fig. 2 do not need to be frequently adjusted manually, the exhaust can be realized only by continuously switching the second electromagnetic valve 10, and the oil filling of the sealed cavity is realized by switching the electric control valve device, so that the debugging process is simplified, the labor cost is saved, and the production efficiency is improved.
Referring to fig. 4, on the other hand, the utility model also discloses a control method for above-mentioned crank arm aerial platform connector leveling hydraulic system, it is provided with first angle sensor on crank arm aerial platform's chassis 16, is provided with second angle sensor on crank arm aerial platform's connector 18, and the angle difference of first angle sensor and second angle sensor is α, controls hydraulic system's work through judging whether α value is in the settlement within range, specifically includes following step:
step one, judging for the first time, judging whether the α value is in a set range, continuously judging in the set range, and performing step two if not;
step two, judging for the second time to judge whether the value α is greater than the set range or smaller than the set range, if greater than the set range, performing step three, and if smaller than the set range, performing step four;
step three, when the α value is larger than the set range, the connecting body 18 inclines towards the direction of the working platform 20 (namely, the direction shown in the figure 1 inclines towards the right), the electric control valve device is powered on, the working oil port B is communicated with the rodless cavity of the connecting body leveling oil cylinder 4 and the rod cavity of the arm folding variable-amplitude oil cylinder 3 through the second pipeline 12 and the oil return branch 14 and charges oil into the rodless cavity of the connecting body leveling oil cylinder 4 and the rod cavity of the arm folding variable-amplitude oil cylinder 3, the connecting body leveling oil cylinder 4 extends and the arm folding variable-amplitude oil cylinder 3 retracts, so that the electric control valve device is;
step four, when the value of α is smaller than the set range, the connecting body 18 inclines away from the working platform 20 (i.e. the direction shown in fig. 1 inclines to the left), the second electromagnetic directional valve 10 is powered on, the rodless cavity of the connecting body leveling cylinder 4 and the rod cavity of the folding arm luffing cylinder 3 are communicated with the oil tank through the oil return pipeline 15, the connecting body leveling cylinder 4 retracts, the folding arm luffing cylinder 3 extends, and the second electromagnetic directional valve 10 is powered off when the value of α returns to the set range.
In the shutdown state, the connecting body leveling cylinder 4 and the arm folding luffing cylinder 3 are both in the retraction state, so that in the third step, the retraction action of the arm folding luffing cylinder 3 is extremely small, and the angle adjustment of the connecting body 18 is mainly realized by the extension of the connecting body leveling cylinder 4. And in the fourth step, the retraction of the connecting body leveling cylinder 4 can be ignored, and the angle adjustment of the connecting body 18 is mainly realized by the extension of the arm folding amplitude-changing cylinder 3.
In the first step, the range of α is set as (88 degrees, 91.5 degrees), namely α degrees is less than or equal to 88 degrees, then step four is executed, and α degrees is more than or equal to 91.5 degrees, then step three is executed.
Preferably, the control method further comprises the step of arranging an alarm device on the crank arm overhead working truck, wherein the alarm device is powered on when the step two is carried out, and the alarm device is powered off when the step three and the step four are finished.
Further preferably, the third step adjusts the α value to fall into the interval (88 degrees, 90 degrees), then controls the electric control valve device to lose power, the alarm device loses power, and the fourth step adjusts the α value to fall into the interval (90 degrees, 91.5 degrees), then controls the second electromagnetic directional valve 10 to lose power, the alarm device loses power, in this way, the right margin is left for the change.
Therefore, by introducing a closed-loop feedback control method, compared with the original open-loop control method for manually judging the verticality of the connecting body, the control method greatly improves the vertical precision of the connecting body, reduces the labor intensity of manual monitoring and improves the market competitiveness of products. And the hydraulic system is automatically regulated and controlled by the control method, so that oil can be filled into a closed cavity formed by a rodless cavity of the connector leveling oil cylinder 4 and a rod cavity of the folding arm amplitude-variable oil cylinder 3 in time, and the problem of the traditional structure when the machine is stopped and restarted is avoided.
The above embodiments are merely preferred embodiments of the present invention, and other embodiments are also possible. Equivalent modifications or substitutions may be made by those skilled in the art without departing from the spirit of the invention, and such equivalent modifications or substitutions are intended to be included within the scope of the claims set forth herein.
Claims (5)
1. The utility model provides a bent arm high altitude construction car connector leveling hydraulic system, includes solenoid directional valve (1), rolls over arm change width of cloth hydro-cylinder (3) and connector leveling hydro-cylinder (4), solenoid directional valve (1) has oil inlet P, working fluid port A, working fluid port B and oil return port T, oil inlet P connects pressure oil, oil return port T is connected with the oil tank, working fluid port A connects the rodless chamber of rolling over arm change width of cloth hydro-cylinder (3) through first pipeline (11), working fluid port B connects the pole chamber that has of connector leveling hydro-cylinder (4) through second pipeline (12), the pole chamber that has of rolling over arm change width of cloth hydro-cylinder (3) connects the rodless chamber of leveling connector hydro-cylinder (4) through third pipeline (13), its characterized in that, be provided with return branch (14) between second pipeline (12) and third pipeline (13), be provided with electric control valve device on return branch (14), the third pipeline (13) is provided with an oil return pipeline (15) connected with an oil tank, and the oil return pipeline (15) is provided with a second electromagnetic directional valve (10).
2. The hydraulic system for leveling the connecting body of the crank arm high-altitude working vehicle according to claim 1, wherein the electrically controlled valve device is provided with a pressure reducing valve (8) and a first electromagnetic directional valve (9).
3. The hydraulic system for leveling the connecting body of the crank arm overhead working truck according to claim 2, wherein the set pressure value of the pressure reducing valve (8) is 20 bar.
4. The connecting body leveling hydraulic system of the crank arm high-altitude work vehicle as claimed in claim 1, 2 or 3, further comprising a first bidirectional balance valve (2), wherein the first bidirectional balance valve (2) comprises a non-rod cavity balance valve of a variable-amplitude cylinder of a folding arm and a rod cavity balance valve of the variable-amplitude cylinder of the folding arm, the non-rod cavity balance valve of the variable-amplitude cylinder of the folding arm is arranged on the first pipeline (11), the rod cavity balance valve of the variable-amplitude cylinder of the folding arm is arranged on the third pipeline (13) at a position close to the variable-amplitude cylinder (3), the non-rod cavity balance valve of the variable-amplitude cylinder of the folding arm is provided with a first oil inlet/outlet port V1, a first oil inlet/outlet port C1 and a control PIL1 for controlling the non-rod cavity balance valve of the variable-amplitude cylinder of the folding arm to be opened reversely, the rod cavity balance valve of the variable-amplitude cylinder of the folding arm is provided with a first variable-amplitude oil inlet port V2, a first oil inlet/outlet port C2 and a control PIL2 for controlling the reverse, the first oil inlet and outlet port V1 and the control oil port PIL2 are respectively communicated with the working oil port A, the first oil inlet and outlet port C1 is communicated with a rodless cavity of the arm folding variable-amplitude oil cylinder (3), a rod cavity of the arm folding variable-amplitude oil cylinder (3) is communicated with the first oil inlet and outlet port C2, the control oil port PIL1 is communicated with the working oil port B, and the first oil inlet and outlet port V2 is connected with the rodless cavity of the connecting body leveling oil cylinder (4) through a third pipeline (13).
5. The connecting body leveling hydraulic system of the crank arm high-altitude work vehicle of claim 4, further comprising a second bidirectional balance valve (5), wherein the second bidirectional balance valve (5) comprises a connecting body leveling cylinder rodless cavity balance valve and a connecting body leveling cylinder rod cavity balance valve, the connecting body leveling cylinder rod cavity balance valve is arranged on the second pipeline (12), the connecting body leveling cylinder rodless cavity balance valve is arranged on the third pipeline (13) at a position close to the connecting body leveling cylinder (4), the connecting body leveling cylinder rodless cavity balance valve is provided with a second oil inlet and outlet port V1 and a second oil inlet and outlet port C1, the connecting body leveling cylinder rod cavity balance valve is provided with a second oil inlet and outlet port V2, a second oil inlet and outlet port C2, and a control oil port PIL3 for controlling the connecting body leveling cylinder rod cavity balance valve to be opened reversely, the control hydraulic fluid port PIL3 communicates with the working hydraulic fluid port A, the second oil inlet and outlet C1 communicates with the rodless chamber of connector leveling cylinder (4), the pole chamber that has of connector leveling cylinder (4) communicates with second oil inlet and outlet C2, second oil inlet and outlet V2 communicates with working hydraulic fluid port B, second oil inlet and outlet V1 communicates through third pipeline (13) with first oil inlet and outlet V2, the tie point of oil return branch (14) is located between second oil inlet and outlet V1 and first oil inlet and outlet V2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920482536.XU CN210176409U (en) | 2019-04-10 | 2019-04-10 | Connecting body leveling hydraulic system of crank arm overhead working truck |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920482536.XU CN210176409U (en) | 2019-04-10 | 2019-04-10 | Connecting body leveling hydraulic system of crank arm overhead working truck |
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| CN210176409U true CN210176409U (en) | 2020-03-24 |
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| CN201920482536.XU Withdrawn - After Issue CN210176409U (en) | 2019-04-10 | 2019-04-10 | Connecting body leveling hydraulic system of crank arm overhead working truck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110002381A (en) * | 2019-04-10 | 2019-07-12 | 湖南星邦重工有限公司 | One kind is cranked arm high-altitude operation vehicle connector leveling hydraulic system and control method |
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2019
- 2019-04-10 CN CN201920482536.XU patent/CN210176409U/en not_active Withdrawn - After Issue
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110002381A (en) * | 2019-04-10 | 2019-07-12 | 湖南星邦重工有限公司 | One kind is cranked arm high-altitude operation vehicle connector leveling hydraulic system and control method |
| CN110002381B (en) * | 2019-04-10 | 2023-06-20 | 湖南星邦智能装备股份有限公司 | Crank arm aerial working vehicle connector leveling hydraulic system and control method |
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