Novel electrically-driven pipe pushing machine

Abstract

The utility model relates to the technical field of pipe pushing machines, in particular to a novel electrically-driven pipe pushing machine which comprises a push-pull device and a power device used for controlling the push-pull device. The push-pull device comprises a pipe holding head and a push-pull oil cylinder used for driving the pipe holding head to move back and forth. The power device comprises an oil tank, a hydraulic pump used for circulating hydraulic oil in the oil tank and the push-pull device, and a permanent magnet synchronous motor used for driving the hydraulic pump to rotate. The device has the effects of being small in size, light in weight, easy to operate, convenient to maintain, energy-saving, environment-friendly and low in noise.

Description

Technical Field

[0001] This application relates to the technical field of pipe pushers, and in particular to a new type of electric drive pipe pusher. Background Art

[0002] A pipe pusher is a device used in the pipeline construction of trenchless horizontal directional drilling rigs. Its function is to increase the pulling force of the pipeline during the start and pulling process of pipeline backhaul. This device is generally arranged in the backfield of pipeline construction.

[0003] The power system of the existing pipe pusher mainly uses a diesel engine to provide power. The output shaft of the diesel engine drives the hydraulic pump to rotate through a coupling. The hydraulic pump outputs high-pressure oil, and the high-pressure oil is transported to the rodless cavities of two push-pull cylinders through a valve group. The push-pull cylinders and the pipe gripper are connected by a pin shaft. Under the forward thrust of the piston rod of the cylinder, the pipe gripper helps to push the pipeline forward to achieve the function of pushing the pipe.

[0004] Regarding the above related technologies, the inventor found that the hydraulic pump is driven by a diesel engine to rotate. Due to the structural design of the diesel engine itself, its size is relatively large to meet the pipe pushing power requirement of the pipe pusher, resulting in inconvenience in installation and repair. Utility Model Content

[0005] In order to solve the above technical problems, this application provides a new type of electric drive pipe pusher, which has the advantages of small size, light weight, simple operation, convenient maintenance, energy conservation and environmental protection, and low noise.

[0006] To achieve the above object, the technical solution of the present utility model is as follows:

[0007] A new type of electric drive pipe pusher includes a push-pull device and a power device for controlling the push-pull device;

[0008] The push-pull device includes a pipe gripper and a push-pull cylinder for driving the pipe gripper to move back and forth;

[0009] The power device includes an oil tank, a hydraulic pump for circulating the hydraulic oil in the oil tank with the push-pull device, and a permanent magnet synchronous motor for driving the hydraulic pump to rotate.

[0010] Implementing the above technical solution, that is, the permanent magnet synchronous motor drives the hydraulic pump to rotate, so that the hydraulic pump pressurizes the hydraulic oil in the hydraulic tank and transports it to each hydraulic device in the push-pull device (such as push-pull cylinders, clamping cylinders, and assembly cylinders, etc.), thereby realizing the effect of electric drive circulating hydraulic oil, and the permanent magnet synchronous motor has the advantages of small size, light weight, energy conservation and environmental protection, and low noise compared with the diesel engine.

[0011] As a preferred solution of this application, the permanent magnet synchronous motor drives the hydraulic pump to rotate through a transfer case.

[0012] To implement the above technical solution, the torque output by the permanent magnet synchronous motor is transmitted to the transfer case, which in turn drives the hydraulic pump to rotate and output high-pressure oil to provide power for the push-pull cylinder.

[0013] As a preferred solution of the present application, the power device further includes a motor controller and a rectification unit electrically connected to the permanent magnet synchronous motor.

[0014] To implement the above technical solution, the rectification unit converts the alternating current generated by industrial electricity or a generator into direct current and then inputs it to the permanent magnet synchronous motor through the motor controller. That is, it can use the alternating current of on-site industrial electricity or hybrid power such as a generator to supply power, thereby improving its applicability. At the same time, the motor controller can control the torque and speed output by the permanent magnet synchronous motor to meet the different working conditions of the push-pull device.

[0015] As a preferred solution of the present application, the push-pull device further includes a base, and a slide rail is provided on the base, and the pipe gripper head moves along the slide rail.

[0016] To implement the above technical solution, that is, by changing the supply and discharge directions of the hydraulic oil in the push-pull cylinder, the reciprocating movement of the telescopic rod of the push-pull cylinder is driven, and then the reciprocating movement of the pipe gripper head is driven. The setting of the slide rail can ensure the smooth movement of the pipe gripper head.

[0017] As a preferred solution of the present application, the push-pull device further includes a bracket, and a lug is provided on the bracket. An installation frame is hinged on the lug, the push-pull cylinder is arranged on the installation frame, and the telescopic rod of the push-pull cylinder is hinged to the pipe gripper head.

[0018] To implement the above technical solution, after the push-pull cylinder is installed on the installation frame, it can rotate with the installation frame to meet different installation environments, so that the push-pull cylinder can normally drive the pipe gripper head to move back and forth along the slide rail.

[0019] As a preferred solution of the present application, the pipe gripper head includes a pipe gripper sleeve, and a plurality of pipe clamping pieces are arranged along the circumferential direction of the inner wall of the pipe gripper sleeve, and a clamping cylinder for driving the pipe clamping pieces to move radially along the pipe gripper sleeve.

[0020] To implement the above technical solution, that is, the clamping cylinder is used to push the pipe clamping pieces to approach each other, so as to achieve the effect of clamping the pipe fitting.

[0021] As a preferred solution of the present application, the pipe gripper sleeve includes a pair of symmetrically arranged pipe sleeve bodies, and both ends of the two pipe sleeve bodies are spliced and fixed through pin shafts.

[0022] To implement the above technical solution, both ends of the two pipe sleeve bodies are spliced and fixed by pin shafts. Thus, the pipe holding sleeve can first insert and hinge one end through a pin shaft, then close the other end, and then insert another pin shaft to complete the fixed connection of the two pipe holding sleeves, which is convenient for processing and installation.

[0023] As a preferred solution of the present application, an assembly oil cylinder is arranged between the two pipe sleeve bodies.

[0024] To implement the above technical solution, that is, the two pipe kit assemblies are driven to merge by the assembly oil cylinder.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. That is, the permanent magnet synchronous motor drives the hydraulic pump to rotate, so that the hydraulic pump pressurizes the hydraulic oil in the hydraulic tank and transports it to each hydraulic device in the push-pull device (such as push-pull oil cylinders, clamping oil cylinders, and assembly oil cylinders, etc.), thus achieving the effect of electrically driving the circulating hydraulic oil. The permanent magnet synchronous motor has the advantages of small size, light weight, energy conservation and environmental protection, and low noise compared with diesel engines. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of the power device in the embodiment of the present application.

[0029] Figure 2 It is a schematic structural diagram of the push-pull device in the embodiment of the present application.

[0030] Figure 3 It is a schematic structural diagram for showing the clamping cylinder in the embodiment of the present application.

[0031] Reference numerals: 1, push-pull device; 11, base; 12, slide rail; 13, pipe holding head; 131, pipe holding sleeve; 1311, pipe sleeve body; 1312, pin shaft; 1313, assembly oil cylinder; 132, pipe holding clip; 133, clamping oil cylinder; 14, push-pull oil cylinder; 15, bracket; 16, lug; 17, mounting frame; 2, power device; 21, fuel tank; 22, hydraulic pump; 23, permanent magnet synchronous motor; 24, motor controller; 25, rectifying unit; 26, transfer case. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following is combined with the attached Figures 1-3A further detailed description of the present application is provided.

[0033] An embodiment of the present application discloses a new type of electric drive pipe pusher. Referring to Figure 1 and Figure 2 , the new type of electric drive pipe pusher includes a push-pull device 1 and a power device 2 for controlling the push-pull device 1.

[0034] Referring to Figure 1 and Figure 2 , the push-pull device 1 includes a base 11. A slide rail 12 is provided on the base 11. A pipe gripping head 13 that moves back and forth along the slide rail 12 and a push-pull oil cylinder 14 for driving the pipe gripping head 13 to move back and forth are provided on the slide rail 12. That is, by changing the supply and discharge directions of the hydraulic oil in the push-pull oil cylinder 14, the reciprocating movement of the telescopic rod of the push-pull oil cylinder 14 is driven, thereby driving the pipe gripping head 13 to move back and forth, so as to achieve the effect of pushing the pipe to move.

[0035] Due to the push pipe site environment, the push-pull device 1 is arranged unevenly, resulting in the push-pull oil cylinder 14 being unable to drive the pipe gripping head 13 to move normally. Therefore, the push-pull device 1 further includes a bracket 15. A lug 16 is provided on the bracket 15. A mounting frame 17 is hinged on the lug 16. The push-pull oil cylinder 14 is fixed on the mounting frame 17, and the telescopic rod of the push-pull oil cylinder 14 is hinged to the pipe gripping head 13. Thus, after the push-pull oil cylinder 14 is installed on the mounting frame 17, it can rotate with the mounting frame 17 to meet different installation environments, so that the push-pull oil cylinder 14 can drive the pipe gripping head 13 to move back and forth along the slide rail 12 normally.

[0036] The pipe gripping head 13 includes a pipe gripping sleeve 131. A plurality of pipe holding clips are evenly arranged along the circumferential direction of the inner wall of the pipe gripping sleeve, and a clamping oil cylinder 133 for driving the pipe holding clips to move radially along the pipe gripping sleeve is provided. That is, by pushing the pipe clamping clips 132 to approach each other through the clamping oil cylinder 133, the effect of clamping the pipe fitting is achieved.

[0037] Since the overall size and volume of the pipe gripping sleeve 131 are relatively large, it is not convenient for processing and installation when integrally formed. Therefore, in the present application, the pipe gripping sleeve 131 includes a pair of symmetrically arranged pipe sleeve bodies 1311. Both ends of the two pipe sleeve bodies 1311 are spliced and fixed through pin shafts 1312. Thus, the pipe gripping sleeve 131 can first insert and hinge one end through the pin shaft 1312, close the other end, and then insert another pin shaft 1312 to complete the fixed connection of the two pipe gripping sleeves 131. In order to facilitate the closing of the two pipe sleeve bodies 1311, an assembly oil cylinder 1313 is provided between the two pipe sleeve bodies 1311, that is, the two pipe sleeve parts are driven to merge through the assembly oil cylinder 1313.

[0038] The power unit 2 includes an oil tank 21, a hydraulic pump 22 for circulating the hydraulic oil in the oil tank 21 with the push-pull device 1, and a permanent magnet synchronous motor 23 for driving the hydraulic pump 22 to rotate. That is, the permanent magnet synchronous motor 23 drives the hydraulic pump 22 to rotate, so that the hydraulic pump 22 pressurizes the hydraulic oil in the hydraulic tank and transports it to each hydraulic device in the push-pull device 1 (such as the push-pull oil cylinder 14, the clamping oil cylinder 133, and the assembly oil cylinder 1313, etc.), thus achieving the effect of electrically driven circulating hydraulic oil, and the permanent magnet synchronous motor 23 has the advantages of small size, light weight, energy conservation, environmental protection, and low noise compared with a diesel engine. The permanent magnet synchronous motor 23 drives the hydraulic pump 22 to rotate through a transfer case 26. The torque output by the permanent magnet synchronous motor 23 is transmitted to the transfer case 26, and then drives the hydraulic pump 22 to rotate, outputting high-pressure oil to provide power for the push-pull oil cylinder 14.

[0039] The power unit 2 further includes a motor controller 24 and a rectifier unit 25 that are electrically connected to the permanent magnet synchronous motor 23. The rectifier unit 25 converts the alternating current generated by industrial electricity or a generator into direct current and then inputs it to the permanent magnet synchronous motor 23 through the motor controller 24. That is, it can use the alternating current of on-site industrial electricity or the hybrid power of a generator and other power supplies, thereby improving its applicability. At the same time, the motor controller 24 can control the torque and speed output by the permanent magnet synchronous motor 23 to meet the different working conditions of the push-pull device 1.

[0040] The implementation principle of a new type of electric drive pipe pusher in the embodiment of this application is: that is, the permanent magnet synchronous motor 23 drives the hydraulic pump 22 to rotate, so that the hydraulic pump 22 pressurizes the hydraulic oil in the hydraulic tank and transports it to each hydraulic device in the push-pull device 1 (such as the push-pull oil cylinder 14, the clamping oil cylinder 133, and the assembly oil cylinder 1313, etc.), thus achieving the effect of electrically driven circulating hydraulic oil, and the permanent magnet synchronous motor 23 has the advantages of small size, light weight, energy conservation, environmental protection, and low noise compared with a diesel engine.

[0041] The above are all the preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A new type of electric drive pipe pusher, characterized by: It comprises a push-pull device (1) and a power device (2) for controlling the push-pull device (1); The push-pull device (1) comprises a pipe holding head (13) and a push-pull oil cylinder (14) for driving the pipe holding head (13) to move back and forth; The power device (2) comprises an oil tank (21), a hydraulic pump (22) for circulating the hydraulic oil in the oil tank (21) and the push-pull device (1), and a permanent magnet synchronous motor (23) for driving the hydraulic pump (22) to rotate.

2. A new type of electric drive pipe pusher according to claim 1, characterized in that: The permanent magnet synchronous motor (23) drives the hydraulic pump (22) to rotate via the transfer case (26).

3. The new electric pipe pusher according to claim 1 is characterized in that: The power device (2) also includes a motor controller (24) and a rectifier unit (25) electrically connected to the permanent magnet synchronous motor (23).

4. The new electric pipe pusher according to claim 1 is characterized in that: The push-pull device (1) further comprises a base (11), a slide rail (12) is arranged on the base (11), and the pipe holding head (13) moves along the slide rail (12).

5. The new electric pipe pusher according to claim 1 is characterized in that: The push-pull device (1) further comprises a bracket (15), the bracket (15) is provided with a lug (16), a mounting frame (17) is hingedly connected to the lug (16), the push-pull cylinder (14) is arranged on the mounting frame (17), and the telescopic rod of the push-pull cylinder (14) is hingedly connected to the pipe holding head (13).

6. The new electric pipe pusher according to claim 1 is characterized by: The pipe holding head (13) comprises a pipe holding sleeve (131), a plurality of storage clips are arranged on the inner wall of the pipe holding sleeve along its circumference, and a clamping cylinder (133) for driving the storage clips to move radially along the pipe holding sleeve.

7. The new electric pipe pusher according to claim 6 is characterized by: The pipe holding sleeve (131) comprises a pair of symmetrically arranged pipe sleeve bodies (1311), and both ends of the two pipe sleeve bodies (1311) are spliced ​​and fixed by means of pin shafts (1312).

8. The new electric-driven pipe pusher according to claim 7 is characterized in that: An assembly oil cylinder (1313) is arranged between the two pipe sleeve bodies (1311).

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