A multi-functional pipe crane

Abstract

The present invention discloses a multi-functional pipe crane, which includes a chassis, an electrical system, a hydraulic system, and a bulldozing assembly and a lifting assembly mounted on the chassis. The electrical system and the hydraulic system control the actions of the bulldozing assembly and the lifting assembly. The chassis includes a left crawler frame, a right crawler frame, a vehicle frame, a balance beam, a pad structure and a pin shaft. The two ends of the balance beam are respectively connected to the left crawler frame and the right crawler frame. When the pipe crane is in the lifting mode, the vehicle frame is fixedly connected to the two ends of the balance beam at a certain angle, so that the bulldozing assembly is located at the maximum elevation angle position. When the pipe crane is in the bulldozing mode, the vehicle frame is suspendedly connected to the balance beam, so that the left crawler frame and the right crawler frame can rotate relative to the vehicle frame. The present invention solves the problem in the prior art that the single function limitation caused by the rigid connection mode of the chassis of the pipe crane cannot meet the requirements of customers for multiple working conditions.

Description

Technical Field

[0001] The present invention relates to a multi-functional pipe crane, belonging to the technical field of pipeline construction equipment. Background Art

[0002] The construction of the national pipeline network will enter a peak period again, bringing great opportunities and also posing great challenges to us. Especially, the demand for multi-functional machines has increased significantly. When constructing pipelines, line cleaning and obstacle removal are carried out first, and equipment such as excavators, bulldozers, and loaders are used more at this time. Then, pipe laying and butt welding are carried out, and the most used equipment at this time is the pipe crane. Therefore, many users have proposed to add the function of a bulldozer to the pipe crane, using it as a bulldozer during line cleaning and obstacle removal, and using it as a pipe crane during pipe laying and butt welding, which greatly improves the construction scope and economic efficiency of the existing pipe crane.

[0003] Currently, the chassis frame and cross beam of the pipe crane mostly adopt a rigid connection method, which ensures the effective contact between the crawler and the ground, has a large friction force, and is stable when stopping, suitable for pipe lifting operations. However, this connection method has weak obstacle-crossing ability and is not suitable for bulldozing operations in complex terrains. Therefore, the existing multi-functional pipe crane is only used for short-distance bulldozing operations, or directly only uses the pipe lifting function, and cannot fully exert all the functions of the pipe crane. In addition, during the installation process, the hinge point of the push shovel boom of the bulldozing component and the left and right platforms of the lifting component will interfere; there is a set of control systems for each of the bulldozing and lifting modes, which is costly and not conducive to the operator's use. Summary of the Invention

[0004] To solve the deficiencies of the existing technology, the purpose of the present invention is to provide a multi-functional pipe crane, which solves the problem of function limitation caused by the rigid connection method of the pipe crane chassis in the existing technology and cannot meet the customer's requirements for multiple working conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A multi-functional pipe crane includes a chassis and a bulldozing component and a lifting component installed on the chassis. The chassis includes a left crawler frame, a right crawler frame, a frame, and a balance beam. Both ends of the balance beam are respectively connected to the left crawler frame and the right crawler frame; when the pipe crane is in the lifting mode, the frame is fixedly connected to both ends of the balance beam at a certain angle; when the pipe crane is in the bulldozing mode, the frame is suspendedly connected to the balance beam, so that the left crawler frame and the right crawler frame can rotate relative to the frame.

[0007] Preferably, when the pipe crane is in the lifting mode, the balance beam and the frame are fixedly connected through a spacer structure.

[0008] Preferably, when the pipe crane is in the bulldozing mode, the middle part of the balance beam is connected to the frame through a pin shaft, and the balance beam rotates around the frame.

[0009] Preferably, the aforementioned earth-moving assembly includes a bulldozing blade. The two ends of the bulldozing blade are provided with folding-type boom arms. The rear hinge points of the folding-type boom arms are respectively connected to the middle parts of the left crawler frame and the right crawler frame. The width of the rear end of the folding-type boom arm is greater than the width of the front end of the boom arm.

[0010] Preferably, the aforementioned hoisting assembly includes a main boom, a fixed pulley block, a lifting steel wire rope, a left platform, a hoisting and luffing mechanism, a luffing pulley block, a right platform, a hook, and a luffing steel wire rope. The left platform is connected to the left crawler frame and is located above the rear hinge point of the left end of the bulldozing blade. The main boom is hinged to the left platform. The right platform is connected to the right crawler frame and is located above the rear hinge point of the right end of the bulldozing blade. The hoisting and luffing mechanism is fixedly connected to the right platform. The two ends of the luffing pulley block are respectively installed on the hoisting and luffing mechanism and the top of the main boom. The two ends of the luffing pulley block are connected by a luffing steel wire rope. One end of the fixed pulley block is fixed on the main boom, and the other end is connected to the hook. The two ends of the fixed pulley block are connected by a lifting steel wire rope.

[0011] Preferably, the aforementioned further includes a counterweight, and the counterweight is connected to the right platform to form a four-bar linkage mechanism.

[0012] Preferably, the aforementioned further includes an electrical system and a hydraulic system. The hoisting mode and the earth-moving mode both realize the operation functions through the electrical system and the hydraulic system.

[0013] Preferably, the aforementioned hydraulic system includes a pilot-operated relief valve, a switching valve, a main pump, a pilot pump, a pilot valve, a control handle, a pilot switching valve, a pipe crane working module, and a bulldozer working module. The main pump is respectively connected to the pipe crane working module and the bulldozer working module through the switching valve. The two ends of the pilot-operated relief valve are respectively connected to the main pump and the fuel tank. The P port of the pilot valve is connected to the pilot pump, the T port is connected to the fuel tank, the A port is connected to the pilot port of the switching valve, and the B port is connected to the oil inlet of the control handle. The port of the control handle is also connected to the pilot switching valve.

[0014] Preferably, when the aforementioned pipe crane is in the hoisting mode, the main pump supplies pressurized oil to the pipe crane working module through the switching valve. The control handle controls the pilot oil port of the pipe crane main valve and manipulates the corresponding working connection to reverse for hoisting operations.

[0015] When the pipe crane is in the earth-moving mode, the pilot-operated relief valve is opened to make the entire hydraulic system in a unloading state. After the solenoid valve of the pilot valve is energized, the pilot pump supplies oil to the pilot port of the switching valve to make the switching valve reverse. The main pump supplies oil to the bulldozer working module through the reversed switching valve. The electric switch controls the pilot switching valve to reverse, and the control handle controls the oil port to switch to the pilot oil port of the bulldozer main valve, and manipulates the corresponding working connection to reverse for earth-moving operations.

[0016] Preferably, when the aforementioned pipe crane is in the hoisting mode, the earth-moving assembly is located at the maximum elevation angle position; when the pipe crane is in the earth-moving mode, the main boom, the fixed pulley block, the lifting steel wire rope, the counterweight, the hook, and the luffing steel wire rope are disassembled.

[0017] Beneficial effects achieved by the present invention:

[0018] 1. The multi-functional chassis solves the technical problems of different requirements for the chassis under different working conditions and can be applicable to pipe lifting and hoisting operations simultaneously.

[0019] 2. The layout of the push shovel and the left and right platforms and the structural form of the push shovel solve the problem of interference when the push shovel and the left and right platforms are installed simultaneously.

[0020] 3. Through the control of a set of hydraulic systems, the switching between the hoisting and bulldozing modes is realized. Description of the Drawings

[0021] Figure 1 is the left axonometric view of the overall structure of the present invention;

[0022] Figure 2 is the right axonometric view of the overall structure of the present invention;

[0023] Figure 3 is the front view of the chassis suspension connection mode of the present invention;

[0024] Figure 4 is the axonometric view of the chassis suspension connection mode of the present invention;

[0025] Figure 5 is the front view of the chassis rigid connection mode of the present invention;

[0026] Figure 6 is the axonometric view of the chassis rigid connection mode of the present invention;

[0027] Figure 7 is the overall machine structure diagram of the present invention in the hoisting mode;

[0028] Figure 8 is the connection schematic diagram of the push shovel boom group of the present invention;

[0029] Figure 9 is the overall machine structure diagram of the present invention in the bulldozing mode;

[0030] Figure 10 is the hydraulic working principle diagram of the present invention.

[0031] The meanings of the reference numerals in the drawings: 1 - chassis; 2 - push shovel; 3 - main boom; 4 - fixed pulley block; 5 - lifting wire rope; 6 - left platform; 7 - counterweight; 8 - hoisting and luffing mechanism; 9 - luffing pulley block; 11 - hydraulic system; 12 - right platform; 13 - vehicle frame; 14 - balance beam; 15 - cushion block structure; 16 - hook; 17 - luffing wire rope; 18 - pilot-operated relief valve; 19 - switching valve; 20 - main pump; 21 - pilot pump; 22 - pilot valve; 23 - control handle; 24 - pilot switching valve; 25 - pin shaft; 26 - left track frame; 27 - right track frame. Detailed implementation manners

[0032] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0033] As Figure 1 、 Figure 2 shown, this embodiment discloses a multi-functional pipe crane, which includes a chassis 1, an electrical system, a hydraulic system 11, a bulldozing assembly, and a lifting assembly. The bulldozing assembly and the lifting assembly share a set of electrical system and hydraulic system 11 to realize their actions. The bulldozing assembly includes a bulldozing blade 2, and the lifting assembly includes a main boom 3, a fixed pulley block 4, a lifting wire rope 5, a left platform 6, a hoisting and luffing mechanism 8, a luffing pulley block 9, a right platform 12, a hook 16, and a luffing wire rope 17.

[0034] Both ends of the bulldozing blade 2 are hinged to the left track frame 26 and the right track frame 27 of the chassis 1 through the boom, and the bulldozing blade 2 is pushed up and down by the hydraulic system 11; the left platform 6 is installed on the left track frame 26, and the main boom 3 is hinged to the left platform 6; the right platform 12 is installed on the right track frame 27, and the hoisting and luffing mechanism 8 is fixed on the right platform 12; both ends of the luffing pulley block 9 are respectively installed on the hoisting and luffing mechanism 8 and the top of the main boom 3, and both ends of the luffing pulley block 9 are connected by the luffing wire rope 17 to connect the main boom 3 and the hoisting and luffing mechanism 8 into a whole; one end of the fixed pulley block 4 is fixed on the main boom 3, and the other end is connected with a hook 16. Both ends of the fixed pulley block 4 are connected by the lifting wire rope 5. The electrical system can control the winding and unwinding of the luffing wire rope 17 and the lifting wire rope 5, so as to realize the actions of the hoisting and luffing mechanism 8 and the luffing pulley block 9. A counterweight 7 is also connected to the right platform. The counterweight 7 is a four-bar linkage mechanism, and under the drive of the counterweight luffing oil cylinder, the counterweight 7 can be lifted and lowered to realize the change of the distance between the center of gravity of the counterweight and the center of the whole machine.

[0035] The chassis 1 includes a left track frame 26, a right track frame 27, a vehicle frame 13, a balance beam 14, a power system, a transmission system, a machine shed, an operator's cab, a fuel tank, and a hydraulic oil tank. Both ends of the balance beam 14 are respectively connected to the left track frame 26 and the right track frame 27. In order to realize multiple functions in one machine, the chassis 1 has two connection modes, Figure 3 、 Figure 4 shown is the suspension connection mode, that is, the vehicle frame 13 and the balance beam 14 are connected by a pin shaft 25 to realize the suspension connection. In this mode, the track frame can rotate relative to the vehicle frame, which is suitable for the working conditions of a bulldozer. Specifically, during the bulldozing operation, the pipe crane is in a continuous walking state. When driving on bumpy roads or turning, the forces on the two tracks are uneven, forming different torques. Since the two track frames are fixedly connected to the balance beam 14, the two torques cause the balance beam 14 to rotate around the connection point of the pin shaft 25; Figure 5 、 Figure 6As shown, it is a rigid connection mode, that is, both ends of the balance beam 14 are fixedly connected to the vehicle frame 13 through the cushion block structure 15 to achieve rigid connection. In this mode, the crawler frame will not rotate relative to the vehicle frame, which is suitable for the lifting operation of the pipe crane.

[0036] Combined with Figure 1 、 Figure 2 , the rear hinge point of the boom of the ripper 2, the left platform 6, and the right platform 12 are respectively arranged in the middle of the left crawler frame 26 and the right crawler frame 27. To avoid interference, the left and right platforms and the boom of the ripper 2 are arranged vertically, that is, the fixed points of the left platform 6 and the right platform 12 are located above the rear hinge point of the boom of the ripper 2. When the ripper reaches Figure 7 the maximum elevation angle shown, it will not interfere with the left and right platforms and will not affect the operation of the counterweight 7 and the main boom 3. As Figure 8 shown, the boom of the ripper 2 is optimized and widened. The rear end of the boom adopts a broken line shape, so that the width of the rear end of the boom is greater than the width of the front end of the boom. Without changing the positions of other fixed points of the ripper 2, it is ensured that there will be no interference when the ripper 2 and the left platform 6 and the right platform 12 are installed simultaneously.

[0037] The multi-functional pipe crane has two working modes. One is the lifting mode. At this time, the chassis 1 is as Figure 3 、 Figure 4 shown, which is a rigid connection mode. Through the hydraulic system 11, the ripper 2 is in the maximum elevation angle position, which can improve the lifting stability. See Appendix Figure 7 ; The other mode is the bulldozing mode. At this time, the chassis 1 is as Figure 5 、 Figure 6 shown, which is a suspension connection. At the same time, components such as the main boom 3, fixed pulley block 4, lifting wire rope 5, counterweight 7, hook 16, and luffing wire rope 17 are disassembled. As Figure 9 shown, the bulldozing performance is improved.

[0038] The hydraulic system 11 includes a pilot-operated relief valve 18, a switching valve 19, a main pump 20, a pilot pump 21, a pilot valve 22, a control handle 23, a pilot switching valve 24, a pipe crane working module, and a bulldozer working module. The hydraulic system 11 also has two working modes. One is the lifting mode, and the other is the bulldozing mode. The two modes share a set of components such as the main pump 20 and the control handle 23, and the mode switching is achieved through the switching valve 19.

[0039] The overall hydraulic system is as shown in Appendix Figure 10 . The main pump 20 is respectively connected to the pipe crane working module and the bulldozer working module through the switching valve 19; both ends of the pilot-operated relief valve 18 are respectively connected to the main pump 20 and the fuel tank; the P port of the pilot valve 22 is connected to the pilot pump 21, the T port is connected to the fuel tank, the A port is connected to the pilot port of the switching valve 19, and the B port is connected to the oil inlet of the control handle 23; the port of the control handle 23 is also connected to the pilot switching valve 24.

[0040] When in the lifting mode, the main pump 20 supplies pressure oil to the pipe-laying crane working module through the switching valve 19. The control handle 23 manipulates the corresponding working connection to reverse by controlling the pilot oil port of the main valve of the pipe-laying crane. When it is necessary to switch to the bulldozing mode, first, the pilot-operated relief valve 18 is opened to make the entire hydraulic system in the unloading state. Then, after the solenoid valve of the pilot valve 22 is energized, the pilot pump 21 supplies oil to the pilot port of the switching valve 19, so that the switching valve 19 reverses. In this way, the main pump 20 supplies oil to the bulldozer working module through the switching valve 19. Then, the pilot switching valve 24 is controlled to reverse by the electric switch. At this time, the control oil port of the control handle 23 is switched to the pilot oil port of the main valve of the bulldozer, and the corresponding working connection is manipulated to reverse for bulldozing operations.

[0041] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A multi-functional pipe crane, characterized in that, it includes a chassis (1) and a bulldozing component and a lifting component installed on the chassis (1). The chassis (1) includes a left crawler frame (26), a right crawler frame (27), a vehicle frame (13), and a balance beam (14). Both ends of the balance beam (14) are respectively connected to the left crawler frame (26) and the right crawler frame (27); When the pipe crane is in the lifting mode, the vehicle frame (13) is fixedly connected to both ends of the balance beam (14) at a certain angle; When the pipe crane is in the bulldozing mode, the vehicle frame (13) is suspendedly connected to the balance beam (14), so that the left crawler frame (26) and the right crawler frame (27) can rotate relative to the vehicle frame (13); The bulldozing component includes a push shovel (2). The two ends of the push shovel (2) are provided with folded boom arms. The rear hinge points of the folded boom arms are respectively connected to the middle parts of the left crawler frame (26) and the right crawler frame (27). The width of the rear end of the folded boom arm is greater than that of the front end; The lifting component includes a main boom (3), a fixed pulley block (4), a lifting steel wire rope (5), a left platform (6), a hoisting and luffing mechanism (8), a luffing pulley block (9), a right platform (12), a hook (16), and a luffing steel wire rope (17); The left platform (6) is connected to the left crawler frame (26) and is located above the rear hinge point of the left end boom of the push shovel (2). The main boom (3) is hinged to the left platform (6); The right platform (12) is connected to the right crawler frame (27) and is located above the rear hinge point of the right end boom of the push shovel (2). The hoisting and luffing mechanism (8) is fixedly connected to the right platform (12); Both ends of the luffing pulley block (9) are respectively installed at the top of the hoisting and luffing mechanism (8) and the main boom (3). Both ends of the luffing pulley block (9) are connected by a luffing steel wire rope (17); One end of the fixed pulley block (4) is fixed on the main boom (3), and the other end is connected to the hook (16). Both ends of the fixed pulley block (4) are connected by a lifting steel wire rope (5); The multi-functional pipe crane further includes an electrical system and a hydraulic system (11). The lifting mode and the bulldozing mode both realize the operation functions through the electrical system and the hydraulic system (11); The hydraulic system (11) includes a pilot-operated relief valve (18), a switching valve (19), a main pump (20), a pilot pump (21), a pilot valve (22), a control handle (23), a pilot switching valve (24), a pipe crane working module, and a bulldozer working module; The main pump (20) is respectively connected to the pipe crane working module and the bulldozer working module through the switching valve (19); Both ends of the pilot-operated relief valve (18) are respectively connected to the main pump (20) and the fuel tank; The P port of the pilot valve (22) is connected to the pilot pump (21), the T port is connected to the fuel tank, the A port is connected to the pilot port of the switching valve (19), and the B port is connected to the oil inlet of the control handle (23); The port of the control handle (23) is also connected to the pilot switching valve (24).

2. The multi-functional pipe crane according to claim 1, characterized in that, When the pipe crane is in the lifting mode, the balance beam (14) and the vehicle frame (13) are fixedly connected through a spacer structure (15).

3. The multi-functional pipe crane according to claim 1, characterized in that, when the pipe crane is in the bulldozing mode, the middle part of the balance beam (14) is connected to the vehicle frame (13) through a pin shaft (25), and the balance beam (14) rotates around the vehicle frame (13).

4. The multi-functional pipe crane according to claim 1, characterized in that, it further includes a counterweight (7), and the counterweight (7) is connected to the right platform (12) to form a four-bar linkage mechanism.

5. The multi-functional pipe crane according to claim 1, characterized in that, when the pipe crane is in the hoisting mode, the main pump (20) supplies pressure oil to the working module of the pipe crane through the switching valve (19), and the control handle (23) manipulates the corresponding working joint to reverse for hoisting operations by controlling the pilot oil port of the main valve of the pipe crane; when the pipe crane is in the bulldozing mode, the pilot-operated relief valve (18) is opened to make the entire hydraulic system in the unloading state. After the solenoid valve of the pilot valve (22) is energized, the pilot pump (21) supplies oil to the pilot port of the switching valve (19) to make the switching valve (19) reverse. The main pump (20) supplies oil to the bulldozer working module through the reversed switching valve (19). The electric switch controls the pilot switching valve (24) to reverse, and the control handle (23) controls the oil port to switch to the pilot oil port of the bulldozer main valve, and manipulates the corresponding working joint to reverse for bulldozing operations; when the pipe crane is in the hoisting mode, the bulldozing assembly is located at the maximum elevation angle position; when the pipe crane is in the bulldozing mode, the main boom (3), fixed pulley block (4), lifting wire rope (5), counterweight (7), hook (16), and luffing wire rope (17) are disassembled.

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