Integral telescopic cutting unit control method and hydraulic system thereof

Abstract

The application discloses a kind of integral telescopic cutting part control method and its hydraulic system, integral telescopic cutting part includes the slide rail that can be telescopic action before and after on slide, installation pressure device can be compressed slide rail on slide, the rotary table that can be action left and right is installed above slide rail, rotary table connects the cutting arm that can be action up and down, control method includes: determine current working state, i.e. the telescopic action state that slide rail can be telescopic action before and after, or the cutting action state that rotary table can be action left and right and cutting arm can be action up and down;According to current working state, select compression or release compression slide rail, while limit another action state implementation, i.e. cutting action state, compress slide rail, limit telescopic action state, telescopic action state, release compression slide rail, limit cutting action state.Cutting operation can automatically compress telescopic mechanism, and realize the operation interlock of telescopic operation and cutting operation, even if misoperation also can not cause safety problem, greatly simplify the operation difficulty of worker.

Description

Technical Field

[0001] This invention relates to the field of tunneling machine technology, and in particular to a control method and hydraulic system for an integral telescopic cutting section. Background Technology

[0002] Currently, the telescopic mechanism of the cutting section of mining tunneling machines is mostly a cantilever telescopic structure, which is complex. When operating in hard tunneling environments such as semi-coal and rock tunnels, the connecting key is easily worn and the mechanism is deformed and failed due to the large external forces and vibrations, resulting in low reliability.

[0003] To improve the stability and reliability of cutting, we designed a tunneling machine with an integral telescopic cutting section. During cutting, the telescopic mechanism is pressed down by parallel clamping cylinders to prevent vibration; after releasing the parallel clamping cylinders, the tunneling machine can extend and retract the entire cutting section. Furthermore, to address the harsh underground environment and the potential safety hazards of misoperation, which could easily damage the cutting and telescopic mechanisms, it is necessary to invent a control method and its hydraulic system that establishes a mutual locking relationship between the telescopic, cutting, and parallel clamping functions. Summary of the Invention

[0004] The purpose of this invention is to provide a control method for an integral telescopic cutting section, and further to provide an integrated and highly reliable hydraulic system for an integral telescopic cutting section, so as to solve the problems mentioned in the background art.

[0005] The technical solution adopted in this invention is to provide a control method for an integral telescopic cutting section, applied to an integral telescopic tunneling machine. The integral telescopic cutting section includes a slide rail that can extend and retract on a slide track. A clamping device is installed on the slide rail to clamp the slide rail. A rotary table that can move left and right is installed above the slide rail. The rotary table is connected to a cutting arm that can move up and down. The control method includes:

[0006] Determine the current working state, that is, the telescopic motion state in which the slide rail can extend and retract forward and backward, or the cutting motion state in which the rotary table can move left and right and the cutting arm can move up and down.

[0007] Select to tighten or loosen the slide rail according to the current working state, while restricting the implementation of another action state. That is, when the cutting action state is in progress, tighten the slide rail and restrict the telescopic action state. When the telescopic action state is in progress, loosen the slide rail and restrict the cutting action state.

[0008] Furthermore, the slide rail is driven by a telescopic hydraulic cylinder, the rotary table is driven by a cutting rotary hydraulic cylinder, the cutting arm is driven by a cutting lifting hydraulic cylinder, and the clamping device is a parallel clamping hydraulic cylinder.

[0009] Furthermore, during the cutting action, high-pressure oil is drawn from the cutting lifting cylinder and the cutting rotating cylinder and enters the parallel clamping cylinder to clamp the slide rail. At the same time, the oil is drawn out to trigger the controller of the telescopic cylinder to cut off the oil supply and prevent it from operating. During the telescopic action, the oil in the parallel clamping cylinder is released to release the clamping of the slide rail. At the same time, the oil is drawn out from the telescopic cylinder to trigger the controller of the cutting lifting cylinder and the cutting rotating cylinder to cut off the oil supply and prevent it from operating.

[0010] The present invention also provides an integral telescopic cutting section hydraulic system, comprising:

[0011] A hydraulic pump is used to provide hydraulic oil at a predetermined pressure and flow rate.

[0012] The cutting lifting cylinder is used to drive the cutting arm to move up and down.

[0013] The cutting rotary cylinder is used to drive the rotary table to rotate, thereby causing the cutting arm to move left and right.

[0014] Telescopic hydraulic cylinder is used to drive the slide rail to move horizontally, thereby causing the cutting part to move back and forth as a whole;

[0015] Parallel clamping cylinders are used to clamp the slide rail and restrict its movement.

[0016] A proportional multi-way valve is used to integrate the working oil circuits of the cutting lifting cylinder, the cutting rotation cylinder, and the telescopic cylinder;

[0017] The cutting pilot four-way handle is used to control the valve core movement of the proportional multi-way valve, thereby controlling the cutting lifting cylinder and the cutting rotary cylinder;

[0018] The telescopic pilot handle is used to control the movement of the proportional multi-way valve spool, thereby controlling the telescopic hydraulic cylinder;

[0019] The inlet of the proportional multi-way valve is connected to the outlet of the hydraulic pump, the feedback port is connected to the feedback port of the hydraulic pump, and the outlet is connected back to the oil tank. The first, second, and third working ports of the proportional multi-way valve are connected to the inlet and outlet ports of the cutting lifting cylinder, the cutting rotating cylinder, and the telescopic cylinder, respectively. The first and second control ports of the proportional multi-way valve are connected to the control port of the cutting pilot four-way handle. The third control port of the proportional multi-way valve is connected to the control port of the telescopic pilot handle. The pilot oil outlet of the proportional multi-way valve is connected to the inlet ports of the cutting pilot four-way handle and the telescopic pilot handle, respectively, and then connected back to the oil tank.

[0020] The working oil circuits of the cutting lifting cylinder and the cutting rotating cylinder are respectively connected to the oil inlet of the one-way valve group, and the oil outlet of the one-way valve group is connected to the pressing oil circuit of the parallel pressing cylinder.

[0021] Furthermore, the oil outlet of the one-way valve assembly is connected to the first relief valve and then back to the oil tank. The first relief valve is set to high pressure to act as a safety valve.

[0022] Furthermore, the oil inlet from the first tee connector to the cutting pilot four-way handle is the first pilot oil circuit, and the oil inlet from the first tee connector to the telescopic pilot handle is the second pilot oil circuit.

[0023] Furthermore, in the first pilot oil circuit, a first two-position three-way directional valve is connected before the oil inlet of the cutting pilot four-way handle; in the second pilot oil circuit, a second two-position three-way directional valve is connected before the oil inlet of the telescopic pilot handle; the working oil circuit of the telescopic cylinder is connected to the two oil inlets of the first shuttle valve; the oil outlet of the first shuttle valve is connected to the first pressure reducing valve and then to the control port of the first two-position three-way directional valve; the working oil circuits of the cutting lifting cylinder and the cutting rotating cylinder are respectively connected to the two oil inlets of the third shuttle valve and the second shuttle valve; the oil outlets of the second shuttle valve and the third shuttle valve are respectively connected to the two oil inlets of the fourth shuttle valve; the oil outlet of the fourth shuttle valve is connected to the second pressure reducing valve and then to the control port of the second two-position three-way directional valve.

[0024] Furthermore, the oil outlet of the check valve assembly is connected to the oil outlet of the hydraulic check valve, the oil inlet of the hydraulic check valve is connected to the second relief valve and then back to the oil tank, the second relief valve is set to low pressure to act as back pressure, and the oil outlet of the first shuttle valve is connected to the first pressure reducing valve and then connected to the control port of the hydraulic check valve.

[0025] Furthermore, both the first and second pressure-reducing valves are constant pressure-reducing valves.

[0026] Furthermore, the first and second position three-way directional valves and the second and second position three-way directional valves are pilot-operated hydraulic directional valves.

[0027] Furthermore, the inlet and outlet ports of the cutting lifting cylinder, cutting rotating cylinder, and telescopic cylinder are all integrated with bidirectional balance valves.

[0028] This invention proposes a control method for an integral telescopic cutting section, and further details its hydraulic system, which is highly suitable for explosion-proof downhole applications. Through the design of hydraulic valves and oil circuits, the telescopic cutting section integrates telescopic, cutting, and parallel clamping functions. During cutting operations, the telescopic rails are automatically clamped; during telescopic operations, they are automatically released. Interlocking of telescopic and cutting operations is achieved, ensuring safety even in case of misoperation and significantly simplifying operator work. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall telescopic cutting section structure of the present invention;

[0030] Figure 2 This is a partial schematic diagram of the slide rail in the pressed state of the present invention.

[0031] Figure 3This is a schematic diagram of the hydraulic system of the integral telescopic cutting section of the present invention;

[0032] Icons: 1-Frame, 2-Slide rail, 3-Slide path, 4-Parallel clamping cylinder, 401-Clamping cylinder piston, 5-Cutting arm, 6-Cutting lifting cylinder, 7-Turntable, 8-Cutting rotary cylinder, 9-Telescopic cylinder, 10-Hydraulic pump, 11-Proportional multi-way valve, 12-Cutting pilot four-way handle, 13-Telescopic pilot handle, 14-First three-way connector, 15-First two-position three-way directional valve, 16-Second two-position three-way directional valve, 17-First shuttle valve, 18-First pressure reducing valve, 19-Second three-way connector, 20-Hydraulic check valve, 21-First overflow valve, 22-Second overflow valve, 23-Check valve assembly, 24-Second shuttle valve, 25-Third shuttle valve, 26-Fourth shuttle valve, 27-Second pressure reducing valve. Detailed Implementation

[0033] To better understand the purpose, structure, and function of this invention, the following detailed description, in conjunction with the accompanying drawings, provides a method for controlling an integral telescopic cutting section and its hydraulic system.

[0034] like Figure 1 and Figure 2 As shown, the integrated telescopic cutting unit includes: a frame 1, a slide rail 2, a slide track 3, a parallel clamping cylinder 4, a cutting arm 5, a cutting lifting cylinder 6, a rotary table 7, a cutting rotation cylinder 8, and a telescopic cylinder 9. The slide track 3 is fixed to the frame 1. The slide rail 2 is pushed by the telescopic cylinder 9 and moves horizontally within the slide track 3. The rotary table 7 is installed on the slewing bearing above the slide rail 2. The rotary table 7 is connected to the cutting arm 5. The rotary table 7 and the cutting arm 5 move back and forth together with the slide rail 2. The cutting lifting cylinder 6 controls the up and down movement of the cutting arm 5. The cutting rotation cylinder 8 drives the rotary table 7 to control the left and right movement of the cutting arm 5. The parallel clamping cylinder 4 is fixed to the upper wall of the slide track 3, and the piston 401 of the parallel clamping cylinder clamps the slide rail 2.

[0035] A control method for an integral telescopic cutting unit: Determine the current working state, i.e., the telescopic action state in which the slide rail 2 can telescopically move back and forth, or the cutting action state in which the rotary table 7 can move left and right and the cutting arm 5 can move up and down; Select to tighten or loosen the slide rail 2 according to the current working state, while restricting the implementation of another action state, i.e., when in the cutting action state, tighten the slide rail 2 to restrict the telescopic action state, and when in the telescopic action state, loosen the tightening of the slide rail 2 to restrict the cutting action state.

[0036] In this embodiment, the controllers for the cutting and telescopic actions are the cutting pilot four-way handle 12 and the telescopic pilot handle 13, respectively. Operating the cutting pilot four-way handle 12 causes the cutting arm 5 to perform up-down and left-right cutting actions, while the slide rail 2 and slide chute 3 remain pressed together. Operating the telescopic pilot handle 13 moves the slide rail 2 within the slide rail 3, causing the cutting arm 5 to telescopically extend and retract to perform a grooving action. The cutting and telescopic actions alternate and cannot occur simultaneously.

[0037] Specifically, when the cutting pilot four-way handle 12 is operated for cutting operations, a portion of high-pressure oil is drawn from the cutting lifting cylinder 6 and the cutting rotating cylinder 8 and enters the parallel clamping cylinder 4, enabling the parallel clamping cylinder 4 to automatically perform a clamping action, pressing the slide rail 2 onto the slide track 3 to prevent vibration and ensure stable operation of the cutting arm 5. At the same time, oil continues to be drawn from the cutting lifting cylinder 6 and the cutting rotating cylinder 8 to cut off the oil supply to the telescopic pilot handle 13 to prevent its misoperation.

[0038] When the telescopic pilot handle 13 is operated to extend or retract the cutting section, the oil in the parallel clamping cylinder 4 is released, and a gap appears between the slide rail 2 and the slide 3, allowing relative movement. At the same time, some oil is drawn out from the telescopic cylinder 9 to cut off the oil supply to the cutting pilot four-way handle 12 and prevent its misoperation.

[0039] like Figure 3 As shown, in this embodiment, the hydraulic system of the integral telescopic cutting section includes: a hydraulic pump 10, a proportional multi-way valve 11, a cutting lifting cylinder 6, a cutting rotation cylinder 8, a telescopic cylinder 9, a cutting pilot four-way handle 12, a telescopic pilot handle 13, a first three-way connector 14, a first two-position three-way directional valve 15, a second two-position three-way directional valve 16, a first shuttle valve 17, a first pressure reducing valve 18, a second three-way connector 19, a hydraulically controlled check valve 20, a first overflow valve 21, a second overflow valve 22, a parallel clamping cylinder 4, a check valve group 23, a second shuttle valve 24, a third shuttle valve 25, a fourth shuttle valve 26, and a second pressure reducing valve 27.

[0040] The inlet P port of the proportional multi-way valve 11 is connected to the outlet port of the hydraulic pump 10, the feedback port LS port is connected to the feedback port of the hydraulic pump 10, and the outlet R port is directly connected back to the oil tank. The inlet and outlet ports of the cutting lifting cylinder 6, the cutting rotating cylinder 8, and the telescopic cylinder 9 are connected to the first, second, and third working ports of the proportional multi-way valve 11, respectively. The control port of the cutting pilot four-way handle 12 is connected to the first and second control ports of the proportional multi-way valve 11, respectively, and the control port of the telescopic pilot handle 13 is connected to the third control port of the proportional multi-way valve 11.

[0041] The pilot oil outlet X port of the proportional multi-way valve 11 is connected to one interface of the first three-way connector 14, and the other two interfaces are connected to the A1 port of the first two-position three-way directional valve 15 and the A2 port of the second two-position three-way directional valve 16, respectively. The B1 port of the first two-position three-way directional valve 15 is connected to the oil inlet of the cutting pilot four-way handle 12, and the T1 port is connected to the return oil tank. The B2 port of the second two-position three-way directional valve 16 is connected to the oil inlet of the telescopic pilot handle 13, and the T2 port is connected to the return oil tank.

[0042] The oil inlet of the one-way valve assembly 23 is connected to the working oil circuit between the proportional multi-way valve 11 and the cutting lifting cylinder 6 and the cutting rotary cylinder 8, respectively. The oil outlet of the one-way valve assembly 23 is connected back to the oil tank after passing through the hydraulic control one-way valve 20 and the second overflow valve 22.

[0043] The parallel clamping cylinder 4 is connected between the oil outlet of the check valve assembly 23 and the hydraulically controlled check valve 20, and is located near the oil outlet end of the check valve assembly 23. The first relief valve 21 is connected between the oil outlet of the check valve assembly 23 and the hydraulically controlled check valve 20, and is located near the end of the hydraulically controlled check valve 20. The first relief valve 21 is set to high pressure to act as a safety valve, and the second relief valve 22 is set to low pressure to act as a back pressure valve.

[0044] The two inlets of the first shuttle valve 17 are connected to the working oil circuit of the telescopic cylinder 9, and the outlet is connected to the inlet of the first pressure reducing valve 18. The outlet of the first pressure reducing valve 18 is connected to one port of the second three-way connector 19, and the other two ports are connected to the control port of the hydraulic check valve 20 and the control port of the first two-position three-way directional valve 15, respectively.

[0045] The two inlets of the second shuttle valve 24 are connected to the working oil circuit of the cutting rotary cylinder 8, and the outlet is connected to the inlet of the fourth shuttle valve 26. The two inlets of the third shuttle valve 25 are connected to the working oil circuit of the cutting lifting cylinder 6, and the outlet is connected to the inlet of the fourth shuttle valve 26. The outlet of the fourth shuttle valve 26 is connected to the control port of the second two-position three-way directional valve 16 after passing through the second pressure reducing valve 27.

[0046] In this embodiment, the inlet and outlet ports of the cutting lifting cylinder 6, the cutting rotating cylinder 8, and the telescopic cylinder 9 are all integrated with bidirectional balance valves. The first pressure reducing valve 18 and the second pressure reducing valve 27 are both constant pressure reducing valves. The first two-position three-way directional valve 14 and the second two-position three-way directional valve 16 are pilot-operated hydraulic directional valves.

[0047] When the tunneling machine operates the cutting pilot four-way handle 12 for cutting operations, high-pressure oil is drawn from the working oil circuits of the cutting lifting cylinder 6 and the cutting rotating cylinder 8, and enters the parallel clamping cylinder 4 through the one-way valve assembly 23. This allows the parallel clamping cylinder 4 to automatically perform a clamping action, ensuring the slide rail 2 is clamped and preventing the cutting section from shaking. During the process, the one-way valve assembly 23 can prevent mutual interference between the cutting cylinders. At the same time, oil continues to be drawn from the working oil circuits of the cutting lifting cylinder 6 and the cutting rotating cylinder 8, and passes through the second pressure reducing valve 27 to the control port of the second two-position three-way reversing valve 16 to reverse its direction, thereby cutting off the oil supply to the telescopic pilot handle 13 to prevent its misoperation.

[0048] When the tunneling machine operates the telescopic pilot handle 13 to extend and retract the cutting section, the oil drawn from the working oil circuit of the telescopic cylinder 9 passes through the first shuttle valve 17 and the first pressure reducing valve 18, and then reaches the second three-way connector 19. One path opens the hydraulic control check valve 20, causing the parallel clamping cylinder 4 to unload oil and loosen the slide rail 2. The other path goes to the control port of the first two-position three-way reversing valve 15 to reverse its direction, thereby cutting off the oil supply to the cutting pilot four-way handle 12 to prevent its misoperation.

[0049] This invention integrates the telescopic, cutting, and parallel clamping functions of a telescopic tunneling machine through the design of hydraulic valves and oil circuits. When the tunneling machine operates the cutting controller for cutting operations, the parallel clamping cylinder 4 can automatically perform a clamping action to ensure that the slide rail 2 of the slide rail 3 is clamped and to prevent vibration. When the tunneling machine operates the telescopic controller for telescopic operations, the telescopic slide rail 2 can be automatically released. At the same time, the telescopic and cutting operations can be interlocked, so even if the operation is misoperated, it will not cause safety problems. It is very suitable for explosion-proof underground environments.

[0050] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A hydraulic system for an integral telescopic cutting section, characterized in that, include: A hydraulic pump (10) is used to provide hydraulic oil at a predetermined pressure and a predetermined flow rate; The cutting lifting cylinder (6) is used to drive the cutting arm (5) to move up and down; The cutting rotary cylinder (8) is used to drive the rotary table (7) to rotate, thereby causing the cutting arm (5) to move left and right; Telescopic cylinder (9) is used to drive the slide rail (2) to move horizontally, thereby causing the cutting part to extend and retract as a whole. Parallel clamping cylinder (4) is used to clamp slide rail (2) and limit the movement of slide rail (2); A proportional multi-way valve (11) is used to integrate the working oil circuits of the cutting lifting cylinder (6), the cutting rotary cylinder (8), and the telescopic cylinder (9); The cutting pilot four-way handle (12) is used to control the valve core of the proportional multi-way valve (11) to control the cutting lifting cylinder (6) and the cutting rotary cylinder (8). The telescopic pilot handle (13) is used to control the valve core movement of the proportional multi-way valve (11) to control the telescopic cylinder (9). The inlet of the proportional multi-way valve (11) is connected to the outlet of the hydraulic pump (10), the feedback port is connected to the feedback port of the hydraulic pump (10), and the outlet is connected back to the oil tank. The first, second, and third working ports of the proportional multi-way valve (11) are connected to the inlet and outlet ports of the cutting lifting cylinder (6), the cutting rotary cylinder (8), and the telescopic cylinder (9), respectively. The first and second control ports of the proportional multi-way valve (11) are connected to the control port of the cutting pilot four-way handle (12). The third control port of the proportional multi-way valve (11) is connected to the control port of the telescopic pilot handle (13). The pilot oil outlet of the proportional multi-way valve (11) is connected to the inlet ports of the cutting pilot four-way handle (12) and the telescopic pilot handle (13), respectively, and then connected back to the oil tank. The working oil circuits of the cutting lifting cylinder (6) and the cutting rotary cylinder (8) are respectively connected to the oil inlet of the one-way valve group (23), and the oil outlet of the one-way valve group (23) is connected to the pressing oil circuit of the parallel pressing cylinder (4). A first two-position three-way directional valve (15) is connected before the oil inlet of the cutting pilot four-way handle (12), and a second two-position three-way directional valve (16) is connected before the oil inlet of the telescopic pilot handle (13). The working oil circuit of the telescopic cylinder (9) is connected to the two oil inlets of the first shuttle valve (17). The oil outlet of the first shuttle valve (17) is connected to the first pressure reducing valve (18) and then to the control port of the first two-position three-way directional valve (15). The working oil circuits of the cutting lifting cylinder (6) and the cutting rotating cylinder (8) are respectively connected to the two oil inlets of the third shuttle valve (25) and the second shuttle valve (24). The oil outlets of the second shuttle valve (24) and the third shuttle valve (25) are respectively connected to the two oil inlets of the fourth shuttle valve (26). The oil outlet of the fourth shuttle valve (26) is connected to the second pressure reducing valve (27) and then to the control port of the second two-position three-way directional valve (16).

2. The hydraulic system for the integral telescopic cutting section according to claim 1, characterized in that, The oil outlet of the one-way valve assembly (23) is connected to the first relief valve (21) and then back to the oil tank. The first relief valve (21) is set to high pressure to act as a safety valve.

3. The hydraulic system for the integral telescopic cutting section according to claim 1, characterized in that, The oil outlet of the check valve assembly (23) is connected to the oil outlet of the hydraulic check valve (20). The oil inlet of the hydraulic check valve (20) is connected to the second relief valve (22) and then back to the oil tank. The second relief valve (22) is set to low pressure to act as back pressure. The oil outlet of the first shuttle valve (17) is connected to the first pressure reducing valve (18) and then connected to the control port of the hydraulic check valve (20).

4. The hydraulic system for the integral telescopic cutting section according to claim 3, characterized in that, Both the first pressure reducing valve (18) and the second pressure reducing valve (27) are constant pressure reducing valves.

5. The hydraulic system for the integral telescopic cutting section according to claim 1, characterized in that, The first two-position three-way directional valve (15) and the second two-position three-way directional valve (16) are pilot-operated hydraulic directional valves.

6. The hydraulic system for the integral telescopic cutting section according to claim 1, characterized in that, The inlet and outlet ports of the cutting lifting cylinder (6), the cutting rotating cylinder (8), and the telescopic cylinder (9) are all integrated with bidirectional balance valves.

7. A control method for an integral telescopic cutting section, employing the hydraulic system of the integral telescopic cutting section as described in claim 1, applied to an integral telescopic tunneling machine, wherein the integral telescopic cutting section includes a slide rail (2) that can extend and retract on a slide rail (3), a clamping device is installed on the slide rail (3) to clamp the slide rail (2), a rotary table (7) that can move left and right is installed above the slide rail (2), and the rotary table (7) is connected to a cutting arm (5) that can move up and down, characterized in that, Control methods include: Determine the current working state, that is, the sliding rail (2) can extend and retract, or the rotary table (7) can move left and right and the cutting arm (5) can move up and down. Select to tighten or loosen the tightening slide rail (2) according to the current working state, and at the same time restrict the implementation of another action state. That is, when the cutting action state is in progress, tighten the slide rail (2) and restrict the telescopic action state; when the telescopic action state is in progress, loosen the tightening slide rail (2) and restrict the cutting action state.

8. The method for controlling the integral telescopic cutting section according to claim 7, characterized in that, The slide rail (2) is driven by the telescopic cylinder (9), the rotary table (7) is driven by the cutting rotary cylinder (8), the cutting arm (5) is driven by the cutting lifting cylinder (6), and the clamping device is a parallel clamping cylinder (4).

9. The control method for the integral telescopic cutting section according to claim 8, characterized in that, During the cutting action, high-pressure oil is drawn from the cutting lifting cylinder (6) and the cutting rotary cylinder (8) and enters the parallel clamping cylinder (4) to clamp the slide rail (2). At the same time, the oil is drawn out to trigger the controller of the telescopic cylinder (9) to cut off the oil supply and prevent it from operating. During the telescopic action, the oil in the parallel clamping cylinder (4) is released to release the clamping of the slide rail (2). At the same time, the oil is drawn out from the telescopic cylinder (9) to trigger the controller of the cutting lifting cylinder (6) and the cutting rotary cylinder (8) to cut off the oil supply and prevent it from operating.

Images