Pull-and-close mechanism and pull-and-close device

Abstract

The present invention relates to the technical field of construction equipment for building engineering, and specifically to a pulling and closing mechanism and a pulling and closing device. The cylinder body of a tilting hydraulic oil cylinder of the pulling and closing mechanism is fixedly connected to the piston rod of the pulling and closing hydraulic oil cylinder, and the cylinder body of the tilting hydraulic oil cylinder can move with the piston rod of the pulling and closing hydraulic oil cylinder, so that the piston rod of the tilting hydraulic oil cylinder does not need to cooperate with the telescopic movement when the piston rod of the pulling and closing hydraulic oil cylinder performs the telescopic movement, and will not interfere with the movement of the piston rod of the pulling and closing hydraulic oil cylinder, and the control difficulty is small, it is not easy to fail, and the energy consumption is also small; by arranging a proportional valve on the pulling and closing mechanism, the proportional valve is used to distribute the hydraulic oil to the pulling and closing hydraulic oil cylinder and the tilting hydraulic oil cylinder, so that the pump station of the pulling and closing device and each pulling and closing mechanism only need two hydraulic oil pipes for oil circuit connection, the amount of oil pipes used is small, the pipe resistance pressure loss and back pressure are small, the installation difficulty is small, and the installation is convenient and quick, and there is no need to be equipped with a frequency conversion motor and a hydraulic pump, and the cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering construction equipment, in particular to a pulling and closing mechanism and pulling and closing equipment. Background Art

[0002] Closing and pulling equipment is widely used in the field of construction engineering. Taking underwater tunnel construction as an example, the prefabricated immersed tube is usually sunk to the bottom of the water first, and then the immersed tube to be pulled and pulled is pulled in the direction of the positioned immersed tube through the closing and pulling equipment, and finally connected with the positioned immersed tube. At present, the closing and pulling equipment generally adopts a hydraulic system, which is composed of a pump station and at least one closing and pulling mechanism. In the existing closing and pulling mechanism, the cylinder bodies of the closing and pulling hydraulic cylinder and the flipping hydraulic cylinder are fixedly connected to the frame. Since the piston rods of the closing and pulling hydraulic cylinder and the flipping hydraulic cylinder are both connected to the pull rod, when the piston rod of the closing and pulling hydraulic cylinder performs telescopic movement, the piston rod of the flipping hydraulic cylinder must perform telescopic movement at the same time, and the movement speed must be kept precisely coordinated, otherwise it will interfere with the movement of the piston rod of the closing and pulling hydraulic cylinder, which is difficult to control, prone to failure, and has high energy consumption; in addition, the existing closing and pulling equipment, the oil inlet pipe and oil return pipe of the closing and pulling hydraulic cylinder and the flipping hydraulic cylinder All of them need to be connected to the pump station, that is, the pump station and each pulling and closing mechanism need to be connected to the oil circuit through at least four hydraulic oil pipes. Because the distance between the pump station and the pulling and closing mechanism is usually far, the hydraulic oil pipe is generally long, which will lead to a large amount of hydraulic oil pipe usage, and the pipe resistance pressure loss and back pressure are large, which will also increase energy consumption. Due to the narrow and harsh underwater construction environment, it is difficult and time-consuming for construction workers to install four hydraulic oil pipes during underwater operations. In order to control the working state of the pulling and closing hydraulic cylinder and the flipping hydraulic cylinder (the movement direction and movement speed of the piston rod), the existing pulling and closing equipment usually needs to be equipped with a variable frequency motor and a hydraulic pump, which is costly. Summary of the invention

[0003] In order to overcome the defects existing in the prior art, the task of the present invention is to provide a pulling and closing mechanism and a pulling and closing device, in which the piston rod of the flipping hydraulic cylinder only performs telescopic movement when the driving pull rod is flipped, and does not need to cooperate with the telescopic movement of the pulling and closing hydraulic cylinder piston rod, and will not interfere with the movement of the pulling and closing hydraulic cylinder piston rod. The control difficulty is small, it is not easy to fail, and the energy consumption is also small. The pump station of the pulling and closing equipment and each pulling and closing mechanism only need two hydraulic oil pipes for oil circuit connection, the oil pipe consumption is small, the pipe resistance pressure loss and back pressure are small, the installation difficulty is small, and the installation is convenient and quick. It does not need to be equipped with a frequency conversion motor and a hydraulic pump, and the cost is low.

[0004] The task of the present invention is achieved through the following technical solutions:

[0005] A pulling and closing mechanism comprises a frame, a pulling and closing hydraulic cylinder, a flipping hydraulic cylinder and a pulling rod. The cylinder body of the pulling and closing hydraulic cylinder is horizontally fixedly connected to the frame. The front end of the piston rod of the pulling and closing hydraulic cylinder is fixedly provided with a first hinge seat, and a second hinge seat is fixedly provided between the two ends of the pulling rod. The front end of the piston rod of the pulling and closing hydraulic cylinder and the rear end of the pulling rod are hinged through the first hinge seat. The cylinder body of the flipping hydraulic cylinder is tilted downward and fixedly connected to the first hinge seat and is located directly above the piston rod of the pulling and closing hydraulic cylinder. The front end of the piston rod of the flipping hydraulic cylinder is hinged to the pulling rod through the second hinge seat. The pulling and closing hydraulic cylinder, the flipping hydraulic cylinder and the pulling rod are located in the same plane, and the front end of the pulling rod is provided with a connecting structure for connecting the object to be pulled.

[0006] As a preferred technical solution, a sub-control cabinet is also provided on the pulling and closing mechanism, and a proportional valve is provided in the sub-control cabinet. The oil inlet pipe and oil return pipe of the pulling and closing hydraulic cylinder, and the oil inlet pipe and oil return pipe of the flipping hydraulic cylinder are all connected to the proportional valve. The proportional valve is also provided with an interface for connecting the main oil supply pipe and the main oil return pipe.

[0007] As a preferred technical solution, a sub-control chip and a power supply module are also provided in the sub-control cabinet, and the pulling and closing hydraulic cylinder and the flipping hydraulic cylinder are provided with sensors, and the sensors include at least one of a stroke sensor, a tension and thrust sensor, and a return oil pressure sensor. The sensor is connected to the sub-control chip, and the sub-control chip is connected to the proportional valve and can control the opening state of the proportional valve.

[0008] As a preferred technical solution, the cabinet body of the sub-control cabinet adopts a waterproof and sealed design.

[0009] As a preferred technical solution, the pulling and closing mechanism also includes at least one supporting and guiding mechanism, which includes a guide rod and a guide seat. The guide seat is provided with a guide hole for the guide rod to pass through. One of the guide rod and the guide seat is fixedly connected to the first articulated seat or the flip hydraulic cylinder body, and the other is fixedly connected to the frame. The guide rod is parallel to the piston rod of the pulling and closing hydraulic cylinder, so that the first articulated seat and the flip hydraulic cylinder that move with the piston rod of the pulling and closing hydraulic cylinder can be supported and guided.

[0010] As a preferred technical solution, the oil inlet pipe and / or oil return pipe of the flipping hydraulic cylinder includes a hard oil pipe and a soft oil pipe connected in series, the hard oil pipe is fixedly connected to the flipping hydraulic cylinder, and a drag chain type pipe sleeve is provided on the outer shell of the soft oil pipe, one end of the drag chain type pipe sleeve is fixedly connected to the hard oil pipe, and the other end is fixedly connected to the frame, thereby being able to play a role in traction and protection for the reciprocating motion of the built-in soft oil pipe.

[0011] As a preferred technical solution, the connection structure is a hanging plate, and the pulling and closing mechanism also includes a hanging frame that matches the hanging plate, and the hanging frame is fixedly connected to the object to be pulled and closed when in use.

[0012] A pulling and closing device comprises a pump station and at least one pulling and closing mechanism as described above, wherein the pump station comprises a hydraulic oil tank, a motor and a hydraulic pump, a pump station oil circuit valve group and a main control cabinet, wherein the pump station oil circuit valve group is connected to the proportional valve of the pulling and closing mechanism via a main oil supply pipe and a main oil return pipe, the pump station delivers hydraulic oil to the proportional valve of the pulling and closing mechanism, and the proportional valve then distributes and delivers the hydraulic oil to the pulling and closing hydraulic cylinder and the flipping hydraulic cylinder, the main control cabinet is directly or indirectly connected to the proportional valve and can control the opening state of the proportional valve, thereby being able to control the movement direction and movement speed of the piston rod of the pulling and closing hydraulic cylinder and the piston rod of the flipping hydraulic cylinder respectively.

[0013] As a preferred technical solution, the pulling and closing device also includes a controller, which includes a touch screen and / or an operating handle. The controller is arranged on the main control cabinet, or the controller is separated from the pump station and connected to the main control cabinet by wire or wirelessly.

[0014] As a preferred technical solution, the pulling and closing device further includes at least one cable winder, which corresponds to the pulling and closing mechanism one by one, and the rotating shafts of the cable winders are connected by a clutch so as to realize independent or synchronous action.

[0015] The camming mechanism of the hydraulic oil cylinder is simple and does not need to be clamped in place, so that the camming mechanism can be easily adjusted, and the controllable hydraulic oil cylinder can be easily adjusted. Equipped with variable frequency motor and hydraulic pump, the cost is low; ③ By setting up a sub-control chip and a power module in the sub-control cabinet, the proportional valve can be controlled nearby; ④ A sensor is set up to facilitate the sub-control chip and / or the main control cabinet to automatically control the pulling and closing mechanism based on the signal detected in real time by the sensor; ⑤ The sub-control cabinet adopts a waterproof and sealed design, which is convenient for underwater construction and has good safety; ⑥ A supporting and guiding mechanism is set on the pulling and closing mechanism, which can support and guide the movement of the first articulated seat and the flip hydraulic cylinder, and the overall structure is more stable and reliable; ⑦ A drag chain pipe sleeve is set up, which can play a role of traction and protection for the reciprocating motion of the built-in soft oil pipe; ⑧ A cable reel is set up to facilitate the winding and unwinding operation of the hydraulic oil pipe. When there are multiple cable reels, the rotating shafts of the cable reels are connected by a clutch, which is convenient for realizing the control of independent or synchronous action of the cable reels to meet the needs of different usage requirements.

[0016] The concept, specific structure and effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the pulling and closing mechanism of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the pulling and closing mechanism of the present invention in an initial state;

[0019] Figure 3 It is a structural schematic diagram of the pulling and closing device of the present invention in a use state;

[0020] Figure 4 It is a schematic diagram of the structure of the pump station in the pulling and closing device of the present invention, in a state where part of the outer box is hidden;

[0021] Figure 5 It is a system schematic diagram of the pulling and closing device of the present invention;

[0022] Figure 6It is a system schematic diagram of a pump station in the pulling and closing device of the present invention.

[0023] Among them: pulling and closing mechanism 1, frame 11, pulling and closing hydraulic cylinder 12, pulling and closing hydraulic cylinder body 121, pulling and closing hydraulic cylinder piston rod 122, turning hydraulic cylinder 13, turning hydraulic cylinder body 131, turning hydraulic cylinder piston rod 132, pull rod 14, hanging plate 141, hanging frame 142, first hinge seat 151, second hinge seat 152, support guide mechanism 16, guide rod 161, guide seat 162, hard Oil pipe 17, drag chain pipe sleeve 18, sub-control cabinet 19, pump station 2, outer box 21, hydraulic oil cabinet 22, motor and hydraulic pump 23, pump station oil circuit valve group 25, main control cabinet 26, main oil supply pipe 271, main oil return pipe 272, cable 273, controller 28, touch screen 281, operating handle 282, cable winder 3, rotating shaft 31, clutch 4, positioning immersed tube 100, immersed tube to be pulled together 200, and installation platform 300. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments of the present invention for underwater tunnel construction. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0025] It should be noted that when an element is referred to as being "connected" to another element, it may be directly connected to the other element or indirectly connected through an intermediate element. In addition, the terms "upper", "lower", "left", "right", "inner", "outer" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0026] Embodiment 1:

[0027] like Figure 1 , 2As shown, a pulling and closing mechanism 1 includes a frame 11, a pulling and closing hydraulic cylinder 12, a flipping hydraulic cylinder 13 and a pull rod 14. The pulling and closing hydraulic cylinder body 121 is horizontally fixedly connected to the frame 11. The front end of the pulling and closing hydraulic cylinder piston rod 122 is fixedly provided with a first hinge seat 151. The two ends of the pull rod 14 are fixedly provided with a second hinge seat 152. The front end of the pulling and closing hydraulic cylinder piston rod 122 is hinged to the rear end of the pull rod 14 through the first hinge seat 151. The pressure cylinder body 131 is tilted downward and fixedly connected to the first hinge seat 151 and is located directly above the pulling and closing hydraulic cylinder piston rod 122. The front end of the flipping hydraulic cylinder piston rod 132 is hinged to the pull rod 14 through the second hinge seat 152. The pulling and closing hydraulic cylinder 12, the flipping hydraulic cylinder 13 and the pull rod 14 are located in the same plane. A hanging plate 141 is provided at the front end of the pull rod 14, and a hanging frame 142 matching the hanging plate 141 is fixedly installed on the immersed tube 200 to be pulled and closed.

[0028] As a preferred embodiment, the pulling and closing mechanism 1 is also provided with a sub-control cabinet 19, and the sub-control cabinet 19 is provided with a proportional valve, a sub-control chip and a power supply module (not shown in the figure). The oil inlet pipe and the oil return pipe of the pulling and closing hydraulic cylinder 12, and the oil inlet pipe and the oil return pipe of the flipping hydraulic cylinder 13 are all connected to the proportional valve (not shown in the figure). The proportional valve is also provided with an interface for connecting the main oil supply pipe and the main oil return pipe. The sub-control chip is connected to the proportional valve and can control the opening state of the proportional valve, thereby controlling the movement direction and speed of the piston rod of the pulling and closing hydraulic cylinder 12 and the piston rod of the flipping hydraulic cylinder 13; the pulling and closing hydraulic cylinder 12 and the flipping hydraulic cylinder 13 are provided with sensors (not shown in the figure), and the sensors include a magnetic ring stroke sensor and an oil return pressure sensor, and the sensors are connected to the sub-control chip. The return oil pressure sensor is installed at the proximal end of the oil cylinder, which can directly reflect the actual pressure condition and more accurately calculate the pulling force and thrust of the oil cylinder. During operation, when the connecting plate 141 of the pull rod 14 and the connecting frame 142 of the immersed tube 200 to be pulled together have not yet been connected, the pulling force of the hydraulic cylinder 12 is still relatively small, and the pressure detected in real time by the return oil pressure sensor is also relatively small. When the pressure detected in real time by the return oil pressure sensor instantly becomes much larger, it means that the connecting plate 141 of the pull rod 14 and the connecting frame 142 of the immersed tube 200 to be pulled together have been connected. The stroke sensor starts to record the stroke at this time, that is, it can record the distance that the immersed tube 200 to be pulled together is pulled. The sensor will feed back the real-time detected data to the sub-control chip in real time, thereby facilitating automatic control.

[0029] As a preferred embodiment, the cabinet body of the sub-control cabinet 19 adopts a waterproof and sealed design, which can withstand an external water pressure of 10 Bar (water depth of about 100m), is convenient for underwater construction, and has good safety.

[0030] As a preferred embodiment, the pulling and closing mechanism 1 further includes two supporting and guiding mechanisms 16, which are respectively arranged on both sides of the flip hydraulic oil cylinder 13. The supporting and guiding mechanisms 16 include a guiding rod 161 and a guiding seat 162. The guiding seat 162 is provided with a guiding hole for the guiding rod 161 to pass through. The guiding rod 161 is fixedly connected to the first hinge seat 151, and the guiding seat 162 is fixedly connected to the frame 11. The guiding rod 161 is parallel to the piston rod 122 of the pulling and closing hydraulic oil cylinder, so that the first hinge seat 151 and the flip hydraulic oil cylinder 13 that follow the movement of the piston rod 122 of the pulling and closing hydraulic oil cylinder can be supported and guided. The supporting and guiding mechanism 16 is arranged on the pulling and closing mechanism 1, which can support and guide the movement of the first hinge seat 151 and the flip hydraulic oil cylinder 13, and the overall structure is more stable and reliable.

[0031] As a preferred embodiment, the oil inlet pipe and the oil return pipe of the flipping hydraulic cylinder 13 both include a hard oil pipe 17 and a soft oil pipe (not shown in the figure) connected in series. The hard oil pipe 17 is fixedly connected to the flipping hydraulic cylinder 13, and a drag chain type pipe sleeve 18 is provided on the outer sleeve of the soft oil pipe. One end of the drag chain type pipe sleeve 18 is fixedly connected to the hard oil pipe 17, and the other end is fixedly connected to the frame 11, so that the reciprocating motion of the built-in soft oil pipe can be pulled and protected. The setting of the drag chain type pipe sleeve 18 can pull and protect the reciprocating motion of the built-in soft oil pipe.

[0032] Embodiment 2:

[0033] like Figure 1-6 As shown, a pulling and closing device includes a pump station 2 and two pulling and closing mechanisms 1 as described above. The pump station 2 includes an outer box 21 and a hydraulic oil tank 22, two sets of motors and hydraulic pumps 23, a pump station oil circuit valve group 25 and a main control cabinet 26 arranged in the outer box 21. The pump station oil circuit valve group 25 is connected to the proportional valve of the pulling and closing mechanism 1 through a main oil supply pipe 271 and a main oil return pipe 272. The pump station 2 delivers hydraulic oil to the proportional valve of the pulling and closing mechanism 1, which is then distributed and delivered to the pulling and closing hydraulic cylinder 12 and the flipping hydraulic cylinder 13 by the proportional valve. The sub-control chip is connected to the main control cabinet 26 and the proportional valve through a cable 273 respectively. The main control cabinet 26 can control the opening state of the proportional valve through the sub-control chip, thereby controlling the movement direction and movement speed of the piston rod of the pulling and closing hydraulic cylinder 12 and the piston rod of the flipping hydraulic cylinder 13.

[0034] When using, Figure 3As shown, the pump station 2 is installed on the installation platform 300 above the water surface, and the frames of the two pulling and closing mechanisms 1 are respectively fixedly installed on the left and right sides of the positioning immersed tube 100. The immersed tube 200 to be pulled and closed is sunk directly in front of the positioning immersed tube 100. The two hanging frames are respectively installed on the left and right sides of the immersed tube 200 to be pulled and closed. The pump station 2 is connected with the proportional valves of each pulling and closing mechanism 1 through the main oil supply pipe 271 and the main oil return pipe 272. The main control cabinet 26 of the pump station 2 can control the opening state of the proportional valve, and then control the movement direction and movement speed of the piston rod of the pulling and closing hydraulic cylinder 12 and the piston rod of the flipping hydraulic cylinder 13 respectively. In the initial state, the piston rod 122 of the pulling and closing hydraulic cylinder and the piston rod 132 of the flipping hydraulic cylinder are both in the retracted state, and the pull rod 14 is in the upward folded state (such as Figure 2 As shown in the figure, when it is necessary to pull the immersed tube 200 to be pulled together, the piston rod 122 of the pulling hydraulic cylinder is first driven to extend forward, and then the piston rod 132 of the flipping hydraulic cylinder is driven to extend forward to flip the pull rod 14 downward to a horizontal position. At this time, the pull rod 14 is embedded in the hanging frame 141, and the hanging plate 141 is located in front of the hanging frame 142. Then, the piston rod 122 of the pulling hydraulic cylinder is driven to retract so that the hanging plate 141 of the pull rod 14 contacts the hanging frame 142 of the immersed tube 200 to be pulled together and realizes the hanging (as shown in the figure). Figure 1 As shown), the piston rod 122 of the pulling and closing hydraulic cylinder is then driven to retract, thereby pulling the immersed tube 200 to be pulled and closed to move toward the positioning immersed tube 100, until the immersed tube 200 to be pulled and closed is pulled and docked with the positioning immersed tube 100.

[0035] The pulling and closing mechanism of the present invention has a flipping hydraulic cylinder body 131 fixedly connected to the pulling and closing hydraulic cylinder piston rod 122. The flipping hydraulic cylinder body 131 can move along with the pulling and closing hydraulic cylinder piston rod 122, so that the flipping hydraulic cylinder piston rod 132 only performs telescopic movement when the driving rod 14 is flipped, and does not need to cooperate with the telescopic movement of the pulling and closing hydraulic cylinder piston rod 122, and will not interfere with the movement of the pulling and closing hydraulic cylinder piston rod 122. The control difficulty is small, it is not easy to fail, and the energy consumption is also small.

[0036] The pulling and closing device of the present invention is provided with a sub-control cabinet 19 on the pulling and closing mechanism 1, and a proportional valve, a sub-control chip and a power module are provided in the sub-control cabinet 19. The proportional valve is used to distribute the hydraulic oil to the pulling and closing hydraulic cylinder 12 and the flipping hydraulic cylinder 13, so that the pump station 2 of the pulling and closing device and each pulling and closing mechanism 1 only need two hydraulic oil pipes for oil circuit connection, the amount of oil pipes used is small, the pipe resistance pressure loss and back pressure are small, the installation difficulty is small, and the installation is convenient and fast. It does not need to be equipped with a variable frequency motor and a hydraulic pump, and the cost is low; by providing a sub-control chip and a power module in the sub-control cabinet 19, the proportional valve can be directly controlled nearby, the use of cables can be reduced, and the failure rate can be reduced. In addition, the pump station 2 can control the two pulling and closing mechanisms 1 to work simultaneously, or control one of them to work alone. The two sets of motors and hydraulic pumps 23 can be backup for each other, or can work simultaneously to meet the needs of different use requirements.

[0037] As a preferred embodiment, the main control cabinet 26 is also provided with a controller 28, which includes a touch screen 281 and an operating handle 282. The main control cabinet can be controlled and parameters can be set with the controller 28, and the touch screen 281 can be used to dynamically simulate and display the action process of the pulling and closing mechanism, and display parameters such as position status and tension. In other embodiments, the controller can also be separated from the pump station 2 and connected to the main control cabinet 26 by wire or wireless to increase the flexibility of control and facilitate remote control. Preferably, Ethernet communication is used for digital signal transmission, which can reduce the use of cables and reduce the failure rate.

[0038] As a preferred embodiment, the pulling and closing device also includes two cable winders 3, which correspond to the pulling and closing mechanism 1 one by one. The rotating shafts 31 of the two cable winders 3 are connected by a clutch 4 so that they can realize independent or synchronous actions to meet the needs of different usage requirements.

[0039] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. A pulling and closing mechanism, characterized in that: The cam body is connected with the hydraulic cylinder to form a circle, and the cam body is connected with the hydraulic cylinder to form a circle, and the cam body is connected with the hydraulic cylinder to form a circle. The plug rod cooperates with the telescopic movement when performing telescopic movement, and will not interfere with the movement of the piston rod of the pulling and closing hydraulic cylinder. The front end of the pull rod is provided with a connecting structure for connecting the object to be pulled together; the pulling and closing mechanism also includes at least one supporting and guiding mechanism, the supporting and guiding mechanism includes a guide rod and a guide seat, the guide seat is provided with a guide hole for the guide rod to pass through, one of the guide rod and the guide seat is fixedly connected to the first articulated seat or the cylinder body of the flip hydraulic cylinder, and the other is fixedly connected to the frame, the guide rod is parallel to the piston rod of the pulling and closing hydraulic cylinder, so as to support and guide the first articulated seat and the flip hydraulic cylinder that follow the movement of the piston rod of the pulling and closing hydraulic cylinder; the connecting structure is a hanging plate, and the pulling and closing mechanism also includes a hanging frame that cooperates with the hanging plate, and the hanging frame is fixedly connected to the object to be pulled together when in use.

2. The pulling and closing mechanism according to claim 1, characterized in that: A sub-control cabinet is also provided on the pulling and closing mechanism, and a proportional valve is arranged in the sub-control cabinet. The oil inlet pipe and oil return pipe of the pulling and closing hydraulic cylinder, and the oil inlet pipe and oil return pipe of the flipping hydraulic cylinder are all connected to the proportional valve. The proportional valve is also provided with an interface for connecting the main oil supply pipe and the main oil return pipe.

3. The pulling and closing mechanism according to claim 2, characterized in that: A sub-control chip and a power module are also provided in the sub-control cabinet. The pulling and closing hydraulic cylinder and the flipping hydraulic cylinder are provided with sensors. The sensors include at least one of a stroke sensor, a tension and thrust sensor, and a return oil pressure sensor. The sensors are connected to the sub-control chip. The sub-control chip is connected to the proportional valve and can control the opening state of the proportional valve.

4. The pulling and closing mechanism according to claim 3, characterized in that: The cabinet body of the sub-control cabinet adopts a waterproof and sealed design.

5. The pulling and closing mechanism according to claim 1, characterized in that: The oil inlet pipe and / or oil return pipe of the flipping hydraulic cylinder includes a hard oil pipe and a soft oil pipe connected in series. The hard oil pipe is fixedly connected to the flipping hydraulic cylinder. A drag chain type pipe sleeve is provided on the outer shell of the soft oil pipe. One end of the drag chain type pipe sleeve is fixedly connected to the hard oil pipe, and the other end is fixedly connected to the frame, thereby being able to play a role of traction and protection for the reciprocating motion of the built-in soft oil pipe.

6. A pulling and closing device, characterized in that: It comprises a pump station and at least one pulling and closing mechanism as described in any one of claims 2 to 4, wherein the pump station comprises a hydraulic oil tank, a motor and a hydraulic pump, a pump station oil circuit valve group and a main control cabinet, wherein the pump station oil circuit valve group is connected to the proportional valve of the pulling and closing mechanism via a main oil supply pipe and a main oil return pipe, and the pump station delivers the hydraulic oil to the proportional valve of the pulling and closing mechanism, which is then distributed and delivered to the pulling and closing hydraulic cylinder and the flipping hydraulic cylinder by the proportional valve, and the main control cabinet is directly or indirectly connected to the proportional valve and can control the opening state of the proportional valve, thereby being able to control the movement direction and movement speed of the piston rod of the pulling and closing hydraulic cylinder and the piston rod of the flipping hydraulic cylinder respectively.

7. The pulling and closing device according to claim 6, characterized in that: The pulling and closing device also includes a controller, which includes a touch screen and / or an operating handle. The controller is arranged on the main control cabinet, or the controller is separated from the pump station and connected to the main control cabinet by wire or wirelessly.

8. The pulling and closing device according to claim 6, characterized in that: The pulling and closing device also includes at least one cable reel, which corresponds to the pulling and closing mechanism one by one, and the rotating shafts of the cable reels are connected by a clutch so as to realize independent action or synchronous action.

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