CN115962169A - Novel telescopic cylinder arm pin control system and crane - Google Patents
Novel telescopic cylinder arm pin control system and crane Download PDFInfo
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- CN115962169A CN115962169A CN202310008431.1A CN202310008431A CN115962169A CN 115962169 A CN115962169 A CN 115962169A CN 202310008431 A CN202310008431 A CN 202310008431A CN 115962169 A CN115962169 A CN 115962169A
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Abstract
The invention discloses a novel telescopic cylinder arm pin control system, which comprises a cylinder arm pin control valve, a cylinder arm pin control pump, a telescopic oil cylinder, a cylinder arm pin switching valve, a cylinder head body and an emergency ball valve, wherein a port P on a valve body of the cylinder arm pin control valve is connected with an oil outlet of the cylinder arm pin control pump; an A port on the valve body of the cylinder arm pin switching valve is connected with a cylinder pin control oil cylinder on the cylinder head body, and a B port is connected with the arm pin control oil cylinder; an electromagnetic proportional overflow valve is arranged in a valve body of the cylinder arm pin control valve, an oil inlet of the electromagnetic proportional overflow valve is communicated with the first oil duct, and an oil outlet of the electromagnetic proportional overflow valve is communicated with the oil return duct. The invention can solve the problem that the arm pin is inserted into the arm pin hole to generate abnormal sound, can realize the optional multi-configuration optional design of two telescopic systems of a single-cylinder bolt and a double-cylinder rope row under the same vehicle type, has higher integral modularization degree and reduces the research and development cost.
Description
Technical Field
The invention relates to the technical field of cranes, in particular to a novel telescopic cylinder arm pin control system and a crane.
Background
The suspension arm telescopic system of the automobile crane mainly has two forms of a double-cylinder rope row and a single-cylinder bolt, wherein the single-cylinder bolt type telescopic system is widely applied to medium-tonnage and multi-section (six-section and above) arm products. The working principle of the single-cylinder bolt type telescopic arm system is as follows: the telescopic arm cylinder is characterized in that a cylinder head body and an arm tail of a target arm cylinder are positioned, a cylinder pin on the cylinder head body extends out and is inserted into a cylinder pin hole in the tail of the target arm cylinder, an arm pin control mechanism pulls the arm pin out to release a locking state between adjacent arm cylinders, a telescopic oil cylinder drives the target arm cylinder to move to a target position and reduce the telescopic speed, the arm pin control mechanism releases the arm pin in advance, the top of the arm pin slides tightly against the cylinder wall of the adjacent outer joint arm until the arm pin is aligned with the target arm pin hole, the arm pin is inserted into the target arm pin hole under the action of a return spring, and two joint arms are locked again to complete telescopic action.
In the prior art, in the process of driving a target arm to move by a telescopic oil cylinder, an arm pin control mechanism drives an arm pin pulling dovetail groove to pull down an arm pin, as shown in fig. 1-b. After the telescopic action is finished, the arm pin is required to be inserted into the target arm hole on the adjacent outer joint arm of the target arm cylinder, the arm pin needs to be released in advance, and meanwhile, the telescopic cylinder reduces the telescopic speed to drive the target arm cylinder to move continuously. The arm pin now released slides against the wall of the adjacent outer joint arm under the action of the arm pin spring, as shown in fig. 1-c. When the arm pin is aligned with the selected arm pin hole, the arm pin is pressed into the pin hole by the arm pin spring, and the arm pin inserting action is completed, as shown in figure 1-a. Because the arm pin is released in advance, when the arm pin slides to the inserted arm pin hole along the wall, the arm pin can impact the arm pin limiting structure to generate impact and loud sound, and the part is easy to damage.
In addition, in the cylinder arm pin control system in the prior art, the cylinder arm pin control valve is integrated in the pilot valve group, and shares one path of oil source with other auxiliary functions (such as rotation, hoisting braking and the like), so that on one hand, the possibility of mutual interference of actions in the composite action process is brought, on the other hand, the difficulty in troubleshooting of faults is increased, and compared with a rope-type telescopic arm system, the bolt-type telescopic system has larger difference in composition and layout of a hydraulic system, so that the design requirements of rope-type and bolt-type optional multiple configurations for the same crane product are difficult to realize, and the research and development cost is increased.
Disclosure of Invention
The invention aims to provide a novel telescopic cylinder arm pin control system and a crane, which are used for solving the problem that impact and loud sound are easily generated during the action of an arm pin in the prior art and can be matched with a rope row type telescopic system.
In order to achieve the purpose, the invention discloses a novel telescopic cylinder arm pin control system on one hand, which comprises a cylinder arm pin control valve, a cylinder arm pin control pump, a telescopic cylinder, a cylinder arm pin switching valve and a cylinder head body, wherein a port P on a valve body of the cylinder arm pin control valve is connected with an oil outlet of the cylinder arm pin control pump, a port T is connected with an oil tank, a port B is connected with the cylinder head body, a port P' is connected with a core pipe on the telescopic cylinder, and the other end of the core pipe is connected with the port P of the cylinder arm pin switching valve; the port A on the valve body of the cylinder arm pin switching valve is connected with the cylinder pin control oil cylinder on the cylinder head body, and the port B is connected with the arm pin control oil cylinder on the cylinder head body;
a first oil duct, a second oil duct, a third oil duct and an oil return duct are arranged in the cylinder arm pin control valve, a port P is connected with the first oil duct, a port B is directly connected with the first oil duct through the oil duct in the valve body, a port A is connected with the second oil duct, a port T is connected with the oil return duct, and a port P' is connected with the third oil duct; an electromagnetic proportional overflow valve is arranged in a valve body of the cylinder arm pin control valve, an oil inlet of the electromagnetic proportional overflow valve is communicated with the first oil duct, and an oil outlet of the electromagnetic proportional overflow valve is communicated with the oil return duct; the cylinder arm pin control valve is characterized in that a pressure control valve is further arranged inside the cylinder arm pin control valve, the pressure control valve is an electromagnetic reversing valve, the second oil duct is communicated with the oil return duct through the pressure control valve in a normal position state, and when the pressure control valve is electrified, the first oil duct is communicated with the second oil duct through the pressure control valve.
And the emergency ball valve consists of two manual ball valves connected in parallel, one end of the emergency ball valve is connected with the port B on the valve body of the cylinder arm pin control valve, and the other end of the emergency ball valve is respectively connected with the arm pin control oil cylinder and the cylinder pin control oil cylinder in the cylinder head body through the two manual ball valves.
Furthermore, a first check valve is arranged on a passage between the port P on the cylinder arm pin control valve body and the first oil channel, and the first check valve only allows oil to flow from the port P to the first oil channel.
Furthermore, a safety valve is further arranged in the cylinder arm pin control valve, an oil inlet of the safety valve is connected with the third oil duct, and an oil outlet of the safety valve is connected with the oil return duct.
Further, a second check valve is arranged between the pressure control valve and the oil return passage, and the second check valve only allows oil to flow from the second oil passage to the oil return passage.
Further, a third check valve and a filter are connected in series between the port P and the port a of the cylinder arm pin switching valve, and the third check valve allows oil to flow from the port a to the port P.
Further, an energy accumulator is further arranged on a valve body of the cylinder arm pin control valve, and an interface of the energy accumulator is communicated with the first oil duct.
Further, the control system further comprises an oil filter which is positioned on an oil path connecting the P' port of the cylinder arm pin control valve with the core pipe.
Furthermore, the control system also comprises an oil return stop valve, and the oil return stop valve is positioned on a pipeline between the oil port A and the oil port P'.
On the other hand, the invention also discloses a crane, which adopts the novel telescopic cylinder arm pin control system.
The invention has the beneficial effects that:
(1) In the process of finding the arm position of the telescopic oil cylinder, the electromagnetic proportional overflow valve in the cylinder arm pin control valve is controlled to reduce the set pressure in a staged manner, so that the arm pin is gradually released, the arm pin is stable when inserted into the arm pin hole, severe impact and noise cannot occur, and the stable operation of related parts and equipment can be protected.
(2) The cylinder arm pin control valve in the control system is independent from the pilot valve in the prior art, so that the reliability is high, and the troubleshooting and the maintenance are more convenient.
(3) Because the cylinder arm pin control valve is independent, and the telescopic switching valve is independently placed on the rotary table in the rope row type telescopic system, the two have similar layouts, so that the selectable multi-configuration optional design of the single-cylinder pin and the double-cylinder rope row type telescopic system under the same vehicle type can be realized, the integral modularization degree is higher, and the research and development cost is reduced.
Drawings
FIG. 1 is a state diagram of a prior art arm pin;
FIG. 2 is a schematic diagram of the control system of the telescopic cylinder arm pin control system of the present invention;
FIG. 3 is a schematic diagram of the cylinder arm pin control valve of the present invention;
FIG. 4 is a timing diagram of proportional relief valve pressure control during arm pin release;
fig. 5 is an arm pin hole inserted in a partially released state of the arm pin.
In the figure, 1-cylinder arm pin control valve, 101-first check valve, 102-electromagnetic proportional overflow valve, 103-accumulator, 104-pressure control valve, 105-safety valve, 106-second check valve, 107-first oil channel, 108-oil return oil channel, 109-second oil channel, 110-third oil channel, 2-cylinder arm pin control pump, 3-oil filter, 4-telescopic oil cylinder, 401-core tube, 5-cylinder arm pin switching valve, 6-cylinder head body, 601-arm pin control oil cylinder, 602-cylinder pin control oil cylinder, 603-arm pin control mechanism, 604-cylinder pin control mechanism, 7-emergency ball valve and 8-oil return stop ball valve.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 2, a novel telescopic cylinder arm pin control system, including cylinder arm pin control valve 1, cylinder arm pin control pump 2, telescopic oil cylinder 4, cylinder arm pin switching valve 5, cylinder head body 6, emergency ball valve 7, the oil-out of cylinder arm pin control pump 2 is connected through the pipeline to the port P on the valve body of cylinder arm pin control valve 1, the oil tank is connected to the port T on the valve body, the emergency ball valve 7 is connected through outside pipeline to the port B on the valve body, emergency ball valve 7 comprises two manual ball valves that connect in parallel, the port B on the valve body of cylinder arm pin control valve 1 is connected simultaneously to one end of two ball valves, arm pin control cylinder 601 and cylinder pin control cylinder 602 in the cylinder head 6 are connected respectively to the other end.
As shown in fig. 3, a first oil duct 107, a second oil duct 109, a third oil duct 110 and an oil return duct 108 are arranged inside the cylinder arm pin control valve 1, a port P on the valve body is connected with the first oil duct 107, a first check valve 101 is arranged between the port P and the first oil duct 107, only oil is allowed to flow from the port P to the first oil duct 107, a port B on the valve body is directly communicated with the first oil duct 107 through the oil duct inside the valve body, a port a on the valve body is connected with the second oil duct 109, a port T on the valve body is connected with the oil return duct 108, and a port P' on the valve body is connected with the third oil duct 110. An electromagnetic proportional overflow valve 102 is arranged inside the valve body, an oil inlet of the overflow valve is connected with a first oil duct 107, and an oil outlet of the overflow valve is communicated with an oil return duct 108. In a standby state of the cylinder arm pin control system, the pressure set by the electromagnetic proportional relief valve 102 is the minimum value, and the unloading of the pump port pressure of the cylinder arm pin control pump 2 is realized. When the arm pin pulling operation and the arm extension and contraction operation of the telescopic cylinder are performed, the relief pressure of the electromagnetic proportional relief valve 102 is set to be maximum.
A safety valve 105 is arranged on the third oil duct 110, an oil inlet of the safety valve 105 is connected with the third oil duct 110, an oil outlet of the safety valve 105 is connected with an oil return duct 108, a pressure control valve 104 is arranged in the cylinder arm pin control valve 1 and used for controlling the pressure of the port P', the pressure control valve 104 is a two-position four-way electromagnetic directional valve, when the pressure control valve 104 is not powered, the second oil duct 109 is communicated with the oil return duct 108 through the pressure control valve 104, and a second one-way valve 106 is arranged between the pressure control valve 104 and the oil return duct 108 and allows oil to flow from the second oil duct 109 to the oil return duct 108. When the pressure control valve 104 is energized, the first oil passage 107 communicates with the second oil passage 109 through the pressure control valve 104. The port P' of the arm pin control valve 1 is connected to a core tube 401 of the telescopic cylinder 4 via a pipe, and an oil filter 3 is provided in the pipe, and the other end of the core tube 401 is connected to the port P of the arm pin switching valve 5. The cylinder arm pin switching valve 5 is also provided with an A port and a B port on the valve body, the P port and the A port are communicated through an oil duct inside the valve body, a third one-way valve and a filter are connected in series between the A port and the B port, and the third one-way valve allows oil to flow from the A port to the P port. An electromagnetic directional valve is provided between the port P and the ports a and B of the cylinder arm pin switching valve 5. When the electromagnetic directional valve is not powered on, the port B is connected with the port P through the electromagnetic valve, an oil way connected with the port A and the valve core is sealed by the electromagnetic directional valve, when the electromagnetic directional valve is powered on, the port A is connected with the port P through the electromagnetic valve, and an oil way connected with the port B and the valve core is sealed by the electromagnetic directional valve. The port A of the cylinder arm pin switching valve 5 is connected with a cylinder pin control cylinder 602 on the cylinder head body 6 through a pipeline, and the port B is connected with the arm pin control cylinder 601.
In the extending process of the telescopic cylinder 4, the volume of the inner cavity of the core pipe 401 is rapidly increased, so that the internal pressure of the inner cavity is rapidly reduced, and conversely, in the retracting process of the cylinder, the volume of the inner cavity of the core pipe 401 is rapidly reduced, so that the internal pressure of the inner cavity is rapidly increased, for this reason, the energy accumulator 103 is arranged on the valve body of the cylinder arm pin control valve 1, an interface of the energy accumulator is communicated with the first oil passage 107 through an oil passage in the valve body, oil is supplemented to the system or redundant oil is absorbed in the extending process of the telescopic cylinder 4, and the pressure of the cylinder arm pin control system is kept relatively stable.
The oil port A and the oil port P' of the cylinder arm pin control valve 1 are connected outside the valve body through pipelines. When the emergency ball valve 7 is used, oil enters the arm pin control oil cylinder 601 or the cylinder pin control oil cylinder 602 from the port B on the cylinder arm pin control valve 1 through the emergency ball valve 7, in order to prevent the oil in the emergency oil path from directly flowing into the internal oil return oil duct 108 through the pipeline, the cylinder arm pin switching valve 5, the core pipe 401 and the port a on the valve body of the cylinder arm pin control valve 1 for pressure relief, the oil return stop ball valve 8 is installed on the pipeline between the port a and the port P', under an emergency working condition, the oil return stop ball valve 8 is closed first, and then the cylinder pin control ball valve or the arm pin control ball valve in the emergency ball valve 7 is opened.
In order to prevent oil from flowing back into the arm pin control valve 1 when the pressure of the core pipe rises in the retraction process of the oil cylinder, scrap iron and other impurities in the telescopic oil cylinder are brought into the arm pin control valve 1, an oil filter 3 is installed on an oil way connecting a P ' oil port of the arm pin control valve 1 and the core pipe 401, and the oil filter is installed between a connection point of the A port and the P ' oil port and a connection point of the P ' oil port and the core pipe 401.
The control principle of the arm-inserting pin of the control system is described in detail as follows:
when arm pulling and arm extending cylinder arm stretching actions are executed, the pressure set by the electromagnetic proportional overflow valve 102 is the maximum value, the pressure control valve 104 is powered, the cylinder arm pin switching valve 5 is not powered, all the way of high-pressure oil of the cylinder arm pin control pump 2 passes through the first oil duct 107 and is communicated with the first oil duct 107 and the second oil duct 109 through the pressure control valve 104, the oil can enter the second oil duct 109, then passes through the oil return stop valve 8 and the oil filter 3 and enters one end of the core pipe 401, after the oil flows out from the other end of the core pipe 401, the oil port P and the oil port B of the cylinder arm pin switching valve 5 at the moment are communicated, the oil can enter the arm pin control cylinder 601 through the oil duct, and the arm pin control cylinder 601 is pushed to move.
After the cylinder pin is inserted into the cylinder pin hole at the end of the target arm cylinder under the control of the cylinder pin control mechanism 604, the arm pin is pulled out by the arm pin control mechanism 603. When the arm pin at the tail of the target arm cylinder is close to the selected arm pin hole on the adjacent outer arm cylinder, the telescopic oil cylinder 4 decelerates and continues to telescope, meanwhile, the set pressure of the electromagnetic proportional relief valve 102 is reduced by a part, as shown in fig. 4, the set pressure of the proportional relief valve is reduced from the maximum Pmax to PL at the moment t1, at this moment, due to the reduction of the pressure, the cylinder rod of the arm pin control oil cylinder 601 retracts by a part, the dovetail groove for pulling the arm pin is driven by the arm pin pulling mechanism to move upwards for a certain distance, the dovetail groove is separated from the arm pin, the telescopic oil cylinder 4 continues to move at a low speed, the arm pin slides tightly against the wall of the adjacent outer arm cylinder, after aligning to the selected arm pin hole, the arm pin spring presses the arm pin into the arm pin hole, but because a part of pressure still exists in the arm pin control oil cylinder 601, the arm pin cannot be completely released, and the arm pin cannot impact on the arm pin limiting structure, as shown in fig. 5. After the arm pin is confirmed to be inserted into the arm pin hole, the set pressure of the electromagnetic proportional relief valve 102 is gradually reduced to the minimum value, as shown at time t2 in fig. 4, the arm pin is completely released, and the arm pin inserting operation is completed. In the process, the arm pin is gradually released, so that the limiting structure of the arm pin is impacted when the arm pin is inserted into the arm pin hole, severe impact and noise cannot be generated, and the service life of the part is ensured.
In a cylinder arm pin control system in the prior art, a cylinder arm pin control valve 1 is integrated in an auxiliary valve and shares a path of oil source with other auxiliary functions (such as rotation, hoisting braking and the like), so that on one hand, the possibility of mutual interference of actions in a composite action process is brought, and on the other hand, the difficulty of troubleshooting is increased. The oil circuit of the cylinder arm pin control system is independent of an upper main valve oil circuit, a rotary action oil circuit, a pilot oil circuit and an auxiliary action oil circuit, the reliability is high, and meanwhile, the troubleshooting and the maintenance are more convenient.
In the control system, the cylinder arm pin control valve 1 is independent from the pilot valve in the prior art and is similar to the layout of a common double-cylinder rope arranging system, so that the optional multi-configuration design of the double-cylinder rope arranging system and a single-cylinder bolt type telescopic system can be developed on the same type of product, the flexibility of product design is increased, and the research and development cost of the product is reduced.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes which can be made within the knowledge of those skilled in the art without departing from the gist of the present invention are within the scope of the claims of the present invention.
Claims (10)
1. A novel telescopic cylinder arm pin control system is characterized by comprising a cylinder arm pin control valve (1), a cylinder arm pin control pump (2), a telescopic oil cylinder (4), a cylinder arm pin switching valve (5) and a cylinder head body (6), wherein,
a port P on a valve body of the cylinder arm pin control valve (1) is connected with an oil outlet of the cylinder arm pin control pump (2), a port T is connected with an oil tank, a port B is connected with the cylinder head body (6), a port P' is connected with a core pipe (401) on the telescopic oil cylinder (4), and the other end of the core pipe (401) is connected with a port P of the cylinder arm pin switching valve (5); an opening A on a valve body of the cylinder arm pin switching valve (5) is connected with a cylinder pin control oil cylinder (602) on the cylinder head body (6), and an opening B is connected with an arm pin control oil cylinder (601) on the cylinder head body (6);
a first oil duct (107), a second oil duct (109), a third oil duct (110) and an oil return duct (108) are arranged in the cylinder arm pin control valve (1), a port P is connected with the first oil duct (107), a port B is directly connected with the first oil duct (107) through the oil duct in the valve body, a port A is connected with the second oil duct (109), a port T is connected with the oil return duct (108), and a port P' is connected with the third oil duct (110); an electromagnetic proportional overflow valve (102) is arranged inside a valve body of the arm pin control valve (1), an oil inlet of the electromagnetic proportional overflow valve (102) is communicated with the first oil duct (107), an oil outlet of the electromagnetic proportional overflow valve is communicated with the oil return duct (108), the electromagnetic proportional overflow valve (102) is set to be the minimum value under the standby state of the arm pin control system, and the overflow pressure of the electromagnetic proportional overflow valve (102) is set to be the maximum value when arm pin pulling action and telescopic action of a telescopic oil cylinder with an arm are executed; the hydraulic control system is characterized in that a pressure control valve (104) is further arranged inside the cylinder arm pin control valve (1), the pressure control valve (104) is an electromagnetic reversing valve, and in a normal position state, the second oil duct (109) is communicated with an oil return duct (108) through the pressure control valve (104), and when the pressure control valve (104) is electrified, the first oil duct (107) is communicated with the second oil duct (109) through the pressure control valve (104).
2. The novel telescopic cylinder arm pin control system according to claim 1, further comprising an emergency ball valve (7), wherein the emergency ball valve (7) is composed of two manual ball valves connected in parallel, one end of the emergency ball valve is connected with a port B on the valve body of the cylinder arm pin control valve (1), and the other end of the emergency ball valve is connected with the arm pin control cylinder (601) and the cylinder pin control cylinder (602) in the cylinder head body (6) through the two manual ball valves respectively.
3. The novel telescopic cylinder arm pin control system according to claim 1, characterized in that a first check valve (101) is arranged on a passage between a port P on a valve body of the cylinder arm pin control valve (1) and a first oil channel (107), and the first check valve (101) only allows oil to flow from the port P to the first oil channel (107).
4. The novel telescopic cylinder arm pin control system according to claim 1, wherein a safety valve (105) is further arranged in the cylinder arm pin control valve (1), an oil inlet of the safety valve (105) is connected with the third oil passage (110), and an oil outlet of the safety valve (105) is connected with the oil return passage (108).
5. The novel telescopic cylinder arm pin control system according to claim 1, characterized in that a second check valve (106) is arranged between the pressure control valve (104) and the return oil passage (108), the second check valve (106) allowing only oil to flow from the second oil passage (109) to the return oil passage (108).
6. The novel telescopic cylinder arm pin control system as claimed in claim 1, wherein a third check valve and a filter are connected in series between the port P and the port A of the cylinder arm pin switching valve (5), and the third check valve allows oil to flow from the port A to the port P.
7. The novel telescopic cylinder arm pin control system according to claim 1, wherein an accumulator (103) is further arranged on a valve body of the cylinder arm pin control valve (1), and an interface of the accumulator (103) is communicated with the first oil channel (107).
8. The novel telescopic boom pin control system according to claim 1, further comprising an oil filter (3), wherein the oil filter (3) is located in an oil path where the port P' of the boom pin control valve (1) is connected to the core tube (401).
9. The novel telescopic cylinder arm pin control system as claimed in claim 1, further comprising an oil return stop ball valve (8), wherein the oil return stop ball valve (8) is located on the pipeline between the oil port A and the oil port P'.
10. A crane, characterized in that a new telescopic cylinder jib pin control system according to any of claims 1 to 9 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310008431.1A CN115962169A (en) | 2023-01-04 | 2023-01-04 | Novel telescopic cylinder arm pin control system and crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310008431.1A CN115962169A (en) | 2023-01-04 | 2023-01-04 | Novel telescopic cylinder arm pin control system and crane |
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| CN115962169A true CN115962169A (en) | 2023-04-14 |
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| CN202310008431.1A Pending CN115962169A (en) | 2023-01-04 | 2023-01-04 | Novel telescopic cylinder arm pin control system and crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118548259A (en) * | 2024-07-30 | 2024-08-27 | 中联重科股份有限公司 | Bolt system, telescopic arm, working machine and control method of bolt system |
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2023
- 2023-01-04 CN CN202310008431.1A patent/CN115962169A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118548259A (en) * | 2024-07-30 | 2024-08-27 | 中联重科股份有限公司 | Bolt system, telescopic arm, working machine and control method of bolt system |
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