A mechanical device for changing the cutter head of a pipe jacking machine

Abstract

The application belongs to the field of pipe jacking machine maintenance equipment, and particularly relates to a mechanical device for replacing a pipe jacking machine cutter head, which comprises a device body, a feeding slope fixed to the side wall of the device body, a fixed frame arranged in the device body, two rotating rollers rotatably connected to the fixed frame and arranged symmetrically in the fixed frame, a driving motor for driving the rotation of the rotating rollers, a fixed arm fixed to the top of the device body, a deflection plate rotatably connected to the side wall of the fixed arm, and a fixed groove arranged in the top of the fixed arm and the deflection plate. The device body is provided with two rotating rollers rotatable in the same direction at the top, and the structure design drives the rotation of the tunneling machine head. The device can make the tunneling machine head face the bottom of the device body, and effectively solves the problem that the height of the pipe jacking machine is high, and the maintenance, replacement and disassembly of the end cutter head of the pipe jacking machine are inconvenient.

Description

Technical Field

[0001] This invention belongs to the field of pipe jacking machine maintenance equipment, specifically a mechanical device for replacing the cutter head of a pipe jacking machine. Background Technology

[0002] Pipe jacking machines are mechanical equipment used in municipal underground trenchless engineering. They consist of a main jacking system, a soil conveying system, a grouting system, and an electrical system. They are mainly suitable for laying underground pipelines that cross highways, railways, waterways, and ground and underground buildings.

[0003] The working principle of a pipe jacking machine is to use the main jacking system to push the tool pipe, which in turn pushes the tunneling head. Through the thrust of the active system and the pipeline, the tunneling head and the tool pipe are pushed from the working shaft through the soil layer to the receiving shaft. During the excavation process, excess soil is discharged through the soil conveying system. When the tunneling head reaches the receiving shaft, a pipeline passage is formed between the working shaft and the receiving shaft.

[0004] During or after the use of the pipe jacking machine, it is necessary to maintain and repair the cutting system and cutting head of the pipe jacking machine, and replace the cutting head that is severely worn beyond the standard. However, due to the height of the pipe jacking machine, it is inconvenient for operators to maintain, repair and replace the cutting head at the end of the pipe jacking machine.

[0005] Therefore, the present invention provides a mechanical device for replacing the cutter head of a pipe jacking machine. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The mechanical device for replacing the cutter head of a tunnel jacking machine, as described in the present invention, includes a device body; a feeding slope is fixedly connected to the side wall of the device body; a fixed frame is provided inside the device body; two rotating rollers are rotatably connected inside the fixed frame, and the two rotating rollers are symmetrically arranged inside the fixed frame; the rotation of the rotating rollers is driven by a drive motor; which makes the maintenance of the tunneling machine head and the replacement of the cutter head more convenient.

[0008] Preferably, a fixed arm is fixedly connected to the top of the device body; a deflection plate is rotatably connected to the side wall of the fixed arm; a fixed groove is formed on the top of the fixed arm and the deflection plate, and a fixing pin is detachably installed inside the fixed groove; multiple rotating shafts are rotatably connected inside the deflection plate; multiple striking rods are fixedly connected to the side wall of the rotating shaft; a synchronous pulley is fixedly connected to the end of the rotating shaft; a synchronous belt is connected between the multiple synchronous pulleys; a second threaded rod is rotatably connected inside the device body; a fixed frame is slidably connected to the inside of the device body; the second threaded rod is threadedly connected to the inside of the fixed frame; a first positioning block is fixedly connected to the side wall of the fixed frame, and the first positioning block is slidably connected to the inside of the device body; a magnetic block is fixedly connected to the bottom of the fixing pin, and a fixed magnetic block is fixedly connected to the bottom of the fixed groove of the fixed arm and the deflection plate; the magnetic block and the fixed magnetic block are arranged in a corresponding manner; this can effectively avoid the deflection plate obstructing the tunneling head, resulting in inconvenient maintenance.

[0009] Preferably, the fixed frame has two sliding blocks internally slidably connected; the fixed frame has a first threaded rod internally rotatably connected; the threads on the first threaded rod are symmetrically arranged along the center line of the first threaded rod; the two sliding blocks are respectively threadedly connected to positions on both sides of the center line of the first threaded rod, and the positions of the two sliding blocks are symmetrically arranged; a drive gear is fixedly connected to the end of the first threaded rod; a driving gear is rotatably connected internally to the fixed frame; the driving gear is meshed with the drive gear; the top of the driving gear is higher than the top surface of the fixed frame; thus, the rotating roller provides better support for the tunneling head.

[0010] Preferably, the deflection plate has a material discharge groove inside; the material discharge groove is opened at the bottom of the rotating cavity of multiple rotating shafts and is interconnected; the device body has a material discharge channel inside; the material discharge channel is opened at the position corresponding to the bottom of the deflection plate; the bottom end of the material discharge groove faces the position of the material discharge channel; making the top of the device body cleaner.

[0011] Preferably, a counterweight is fixed to the striking rod at the bottom of the rotating shaft; the counterweight is positioned at the end of the striking rod; this effectively prevents the striking rod from remaining outside the rotating cavity of the rotating shaft, which could easily obstruct the approach of the tunneling head.

[0012] Preferably, multiple positioning rods are fixedly connected inside the device body; the positioning rods are arranged parallel to the second threaded rod; the fixing frame is slidably connected to the positioning rods; making the sliding of the fixing frame more stable.

[0013] Preferably, the bottom of the fixing frame is fastened with a plurality of anti-wear beads; the anti-wear beads are arranged in a linear array at the bottom of the fixing frame; this effectively avoids excessive pressure from the tunneling head on the fixing frame, which would cause excessive friction between the fixing frame and the ground, making it impossible for the fixing frame to slide.

[0014] Preferably, a second positioning block is fixedly connected to the rotating shaft of the deflection plate; the second positioning block is rotatably connected to an internal position of the device body; making the rotation of the deflection plate more stable.

[0015] Preferably, a plurality of balls are provided between the device body and the second positioning block; the sidewalls of the balls are in contact with the sidewalls of both the device body and the second positioning block; thus reducing wear between the device body and the second positioning block.

[0016] Preferably, a rubber pad is fixed to the outer wall of the rotating roller; the shape and size of the rubber pad are corresponding to the shape and size of the outer wall of the rotating roller; this effectively avoids the rotating roller from being scratched and worn.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The mechanical device for replacing the cutter head of a pipe jacking machine described in this invention, through the structural design of setting two rotating rollers that can rotate in the same direction on the top of the device body to drive the tunneling head to rotate, realizes the function that all parts of the tunneling head can face the bottom of the device body, effectively solving the problem that it is inconvenient for operators to maintain, replace and disassemble the cutter head at the end of the pipe jacking machine due to the high height of the pipe jacking machine.

[0019] 2. The mechanical device for replacing the cutter head of a tunneling machine described in this invention controls the rotation of the second threaded rod, thereby causing the fixing frame to slide towards the fixing arm. The rotation of the rotating shaft drives the striking rod to strike the side wall of the tunneling machine head. This structural design makes cleaning the tunneling machine head more convenient and facilitates subsequent maintenance and cutter head replacement. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a partial structural schematic diagram of the driving gear and the driving gear in this invention;

[0023] Figure 3 This is a partial structural diagram of the fixing frame in this invention;

[0024] Figure 4This is a partial structural schematic diagram of the deflection plate in this invention;

[0025] Figure 5 This is a cross-sectional view of the deflection plate in this invention;

[0026] Figure 6 This is a schematic diagram of the bottom structure of the fixing frame in this invention;

[0027] Figure 7 This is a schematic diagram of the bottom structure of the device body in this invention.

[0028] In the diagram: 1. Device body; 101. Feeding slope; 2. Fixed frame; 201. First positioning block; 3. Rotating roller; 4. Moving block; 5. First threaded rod; 6. Drive gear; 7. Active gear; 8. Fixed arm; 801. Fixed pin; 802. Fixed magnet; 9. Deflection plate; 901. Second threaded rod; 10. Rotating shaft; 11. Striking rod; 12. Synchronous pulley; 13. Synchronous belt; 14. Discharge chute; 141. Discharge channel; 15. Counterweight; 16. Positioning rod; 17. Anti-wear ball; 18. Second positioning block; 19. Ball bearing; 20. Rubber pad. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] like Figures 1 to 2 As shown in the embodiment of the present invention, a mechanical device for replacing the cutter head of a pipe jacking machine includes a device body 1; a feeding ramp 101 is fixedly connected to the side wall of the device body 1; a fixed frame 2 is provided inside the device body 1; two rotating rollers 3 are rotatably connected inside the fixed frame 2, and the two rotating rollers 3 are symmetrically arranged inside the fixed frame 2; the rotation of the rotating rollers 3 is driven by a drive motor; during operation, when it is necessary to maintain and replace the cutter head of the pipe jacking machine, the tunneling head of the pipe jacking machine can be pushed laterally through the feeding ramp 101 into the top between the two rotating rollers 3, and the two rollers can be driven to rotate through the top wall. The support of the rotating roller 3 makes the tunneling head more stable when placed on top of the two drive rollers 3. After the cutter head near the bottom of the tunneling head has been replaced, the drive motor can be controlled to drive the two rotating rollers 3 to rotate in the same direction. The rotation of the rotating rollers 3 can then drive the tunneling head to rotate, so that the top of the tunneling head can rotate to the bottom position and then the drive motor can stop rotating. This moves the cutter head that was originally on the top of the tunneling head to a position near the bottom of the tunneling head, which brings the cutter head on the tunneling head closer to the operator, making the maintenance of the tunneling head and the replacement of the cutter head more convenient.

[0031] like Figure 1 and Figure 5As shown, a fixed arm 8 is fixedly connected to the top of the device body 1; a deflection plate 9 is rotatably connected to the side wall of the fixed arm 8; a fixing groove is formed on the top of the fixed arm 8 and the deflection plate 9, and a fixing pin 801 is detachably installed inside the fixing groove; multiple rotating shafts 10 are rotatably connected inside the deflection plate 9; multiple striking rods 11 are fixedly connected to the side wall of the rotating shaft 10; a synchronous pulley 12 is fixedly connected to the end of the rotating shaft 10; a synchronous belt 13 is connected between the multiple synchronous pulleys 12; the internal rotating shafts of the device body 1... A second threaded rod 901 is connected; the fixing frame 2 is slidably connected to the inside of the device body 1; the second threaded rod 901 is threadedly connected to the inside of the fixing frame 2; a first positioning block 201 is fixedly connected to the side wall of the fixing frame 2, and the first positioning block 201 is slidably connected to the inside of the device body 1; a magnetic block is fixedly connected to the bottom of the fixing pin 801, and a fixing magnetic block 802 is fixedly connected to the bottom of the fixing groove of the fixing arm 8 and the deflection plate 9; the magnetic block and the fixing magnetic block 802 are arranged in a corresponding manner. During operation, when maintenance is required on the tunneling head of the pipe jacking machine, the cutter head of the tunneling head can be positioned with the cutter head facing the fixed arm 8 and placed on top of the rotating roller 3. Then, the second threaded rod 901 can be controlled to rotate. The thread of the second threaded rod 901 engages with the thread of the fixed frame 2, causing the fixed frame 2 to move closer to the fixed arm 8. This brings the tunneling head closer to or into contact with the deflector plate 9, thereby controlling the rotation of the rotating shaft 10. Multiple rotating shafts 10 can rotate simultaneously, and the striking rods 11 on the surface of the rotating shafts 10 can be used to strike the tunneling head. The dried concrete and soil adhering to the tunneling head are knocked off by tapping, making it easier to clean the tunneling head and facilitating subsequent maintenance and cutter head replacement. After cleaning the tunneling head, the second threaded rod 901 can be controlled to rotate in the opposite direction, moving the tunneling head away from the deflector plate 9. At the same time, the fixing pin 801 can be pulled out, and the deflector plate 9 can be tilted down, effectively preventing the deflector plate 9 from obstructing the tunneling head and causing inconvenience in maintenance.

[0032] like Figures 1 to 3As shown, the fixed frame 2 has two sliding blocks 4 internally connected; a first threaded rod 5 is rotatably connected internally to the fixed frame 2; the threads on the first threaded rod 5 are symmetrically arranged along the center line of the first threaded rod 5; the two sliding blocks 4 are respectively threaded to positions on both sides of the center line of the first threaded rod 5, and the positions of the two sliding blocks 4 are symmetrically arranged; a drive gear 6 is fixedly connected to the end of the first threaded rod 5; a driving gear 7 is rotatably connected internally to the fixed frame 2; the driving gear 7 is meshed with the drive gear 6; the top of the driving gear 7 is higher than the fixed frame 2. The top surface of frame 2; during operation, when the tunneling head needs to be placed on top of the two rotating rollers 3, the drive gear 7 can be rotated, causing the drive gear 6 to rotate, which in turn causes the drive gear 6 to rotate, causing the first threaded rod 5 to rotate, so that the two moving blocks 4 threaded on the first threaded rod 5 move closer or further apart, thereby adjusting the distance between the two rotating rollers 3. This effectively avoids the situation where the diameter of the tunneling head is too large, resulting in a relatively flat bottom surface of the tunneling head, making it easy to detach from the two rotating rollers 3, thus making the rotating rollers 3 provide better support for the tunneling head.

[0033] like Figure 1 , Figure 4 and Figure 5 As shown, the deflection plate 9 has a material discharge trough 14 inside; the material discharge trough 14 is opened at the bottom of the rotating cavities of multiple rotating shafts 10 and is interconnected; the device body 1 has a material discharge channel 141 inside; the material discharge channel 141 is opened at the position corresponding to the bottom of the deflection plate 9; the bottom end of the material discharge trough 14 faces the position of the material discharge channel 141; during operation, when cleaning concrete blocks and soil on the tunneling head, by opening the material discharge trough 14 between the rotating cavities of the rotating shafts 10, it is possible to effectively prevent debris from getting stuck inside the rotating cavities of the rotating shafts 10 and obstructing the rotation of the rotating shafts 10. At the same time, opening the material discharge channel 141 at the top of the device body 1 can make less debris accumulate on the top of the device body 1, making the top of the device body 1 cleaner.

[0034] like Figure 5 As shown, a counterweight 15 is fixedly connected to the striking rod 11 at the bottom of the rotating shaft 10. The counterweight 15 is located at the end of the striking rod 11. During operation, when the rotating shaft 10 stops rotating, the counterweight 15 on the striking rod 11 at the bottom of the rotating shaft 10 can press down the striking rod 11, causing the striking rod 11 to drive the rotating shaft 10 to rotate towards the position at the bottom of the rotating shaft 10 corresponding to the striking rod 11. This allows the striking rod 11 to retract into the rotating cavity of the rotating shaft 10, effectively preventing the striking rod 11 from remaining outside the rotating cavity of the rotating shaft 10 and obstructing the approach of the tunneling head.

[0035] like Figure 3 and Figure 7 As shown, multiple positioning rods 16 are fixedly connected inside the device body 1; the positioning rods 16 are arranged parallel to the second threaded rod 901; the fixed frame 2 is slidably connected to the positioning rods 16; during operation, when the fixed frame 2 slides inside the device body 1, the positioning rods 16 restrict the sliding of the fixed frame 2, which can reduce the tilting of the fixed frame 2 during the sliding process and make the sliding of the fixed frame 2 more stable.

[0036] like Figures 6 to 7 As shown, the bottom of the fixed frame 2 is fastened with multiple anti-wear beads 17; the anti-wear beads 17 are arranged in a linear array at the bottom of the fixed frame 2; during operation, when the rotating roller 3 supports the tunneling head, and at the same time the tunneling head is driven to slide through the fixed frame 2, the multiple anti-wear beads 17 at the bottom of the fixed frame 2 can support the fixed frame 2 and change the sliding friction between the fixed frame 2 and the ground into fixed friction, thereby reducing the friction between the fixed frame 2 and the ground, reducing the wear on the fixed frame 2, and effectively avoiding the situation where the pressure of the tunneling head on the fixed frame 2 is too great, resulting in excessive friction between the fixed frame 2 and the ground, making the fixed frame 2 unable to slide.

[0037] like Figure 5 As shown, a second positioning block 18 is fixedly connected to the rotating shaft of the deflection plate 9; the second positioning block 18 is rotatably connected to the internal position of the device body 1; during operation, by setting the second positioning block 18 on the rotating shaft of the deflection plate 9 and restricting the rotation of the second positioning block 18 by the device body 1, the rotating shaft of the deflection plate 9 will tilt less during rotation, making the rotation of the deflection plate 9 more stable.

[0038] like Figure 5 As shown, a plurality of balls 19 are provided between the device body 1 and the second positioning block 18; the sidewalls of the balls 19 are in contact with the sidewalls of both the device body 1 and the second positioning block 18; during operation, when the second positioning block 18 rotates inside the device body 1, the wear between the device body 1 and the second positioning block 18 is reduced by the rolling balls 19 between the device body 1 and the second positioning block 18.

[0039] like Figure 1As shown, a rubber pad 20 is fixed to the outer wall of the rotating roller 3; the shape and size of the rubber pad 20 correspond to the shape and size of the outer wall of the rotating roller 3; during operation, when the rotating roller 3 supports the tunneling head and drives the tunneling head to rotate, by setting the rubber pad 20 on the surface of the rotating roller 3, the contact area between the tunneling head and the rotating roller 3 can be increased, making the effect of the rotating roller 3 driving the tunneling head to rotate better, and at the same time protecting the rotating roller 3, effectively preventing the rotating roller 3 from being scratched and worn.

[0040] When maintenance or replacement of the cutterheads of the pipe jacking machine is required during operation, the tunneling head of the pipe jacking machine can be pushed laterally through the loading ramp 101 into the top between the two rotating rollers 3. With the support of the two rotating rollers 3, the tunneling head is placed more stably on top of the two drive rollers 3. After the cutterheads near the bottom of the tunneling head have been replaced, the drive motor can be controlled to drive the two rotating rollers 3 to rotate in the same direction. In turn, the rotation of the rotating rollers 3 can drive the tunneling head to rotate, so that the top of the tunneling head rotates to the bottom position and then the rotation of the drive motor stops. This moves the cutterheads that were originally at the top of the tunneling head to a position closer to the bottom of the tunneling head, thus bringing the cutterheads on the tunneling head closer to the operator and making the maintenance and replacement of the tunneling head more convenient.

[0041] When maintenance is required on the tunneling head of the pipe jacking machine, the cutter head of the tunneling head can be positioned with the cutter head facing the fixed arm 8 and placed on top of the rotating roller 3. Then, the second threaded rod 901 can be controlled to rotate. The thread of the second threaded rod 901 engages with the thread of the fixed frame 2, causing the fixed frame 2 to move closer to the fixed arm 8. This brings the tunneling head closer to or into contact with the deflection plate 9, thereby controlling the rotation of the rotating shaft 10. This allows multiple rotating shafts 10 to rotate simultaneously, and the striking rods 11 on the surface of the rotating shafts 10 can be used to strike the tunneling head. The dried concrete and soil adhering to the tunneling head are knocked off, making it easier to clean and facilitating subsequent maintenance and cutter head replacement. After cleaning, the second threaded rod 901 can be rotated in the opposite direction to move the tunneling head away from the deflector plate 9. At the same time, the fixing pin 801 can be pulled out and the deflector plate 9 can be tilted down, effectively preventing the deflector plate 9 from obstructing the tunneling head and causing inconvenience in maintenance.

[0042] When the tunneling head needs to be placed on top of the two rotating rollers 3, the drive gear 7 can be rotated, causing the drive gear 6 to rotate, which in turn causes the drive gear 6 to rotate, causing the first threaded rod 5 to rotate. This causes the two moving blocks 4 threaded on the first threaded rod 5 to move closer or further apart, thereby adjusting the distance between the two rotating rollers 3. This effectively avoids the situation where the bottom surface of the tunneling head is relatively flat due to its large diameter, making it easy for it to detach from the two rotating rollers 3, thus improving the support effect of the rotating rollers 3 on the tunneling head.

[0043] When cleaning concrete blocks and soil from the tunneling head, a material discharge chute 14 is provided between the rotating chambers of the rotating shaft 10 to effectively prevent debris from getting stuck inside the rotating chambers of the rotating shaft 10 and obstructing the rotation of the rotating shaft 10. At the same time, a material discharge channel 141 is provided at the top of the device body 1 to reduce the accumulation of debris on the top of the device body 1, making the top of the device body 1 cleaner.

[0044] When the rotating shaft 10 stops rotating, a counterweight 15 is set on the striking rod 11 at the bottom of the rotating shaft 10. The counterweight 15 can press down the striking rod 11, causing the striking rod 11 to drive the rotating shaft 10 to rotate towards the position at the bottom of the rotating shaft 10 corresponding to the striking rod 11. This allows the striking rod 11 to retract into the rotating cavity of the rotating shaft 10, effectively preventing the striking rod 11 from staying outside the rotating cavity of the rotating shaft 10 and easily obstructing the approach of the tunneling head.

[0045] When the fixed frame 2 slides inside the device body 1, the sliding of the fixed frame 2 is restricted by the positioning rod 16, which makes the fixed frame 2 less prone to tilting during the sliding process, and makes the sliding of the fixed frame 2 more stable.

[0046] When the rotating roller 3 supports the tunneling head and simultaneously drives the tunneling head to slide through the fixed frame 2, multiple anti-wear beads 17 are set at the bottom of the fixed frame 2 to support the fixed frame 2 and change the sliding friction between the fixed frame 2 and the ground into fixed friction. This reduces the friction between the fixed frame 2 and the ground, resulting in less wear on the fixed frame 2. This effectively avoids excessive pressure from the tunneling head on the fixed frame 2, which could lead to excessive friction between the fixed frame 2 and the ground, making it impossible for the fixed frame 2 to slide.

[0047] By setting a second positioning block 18 on the rotating shaft of the deflection plate 9 and restricting the rotation of the second positioning block 18 by the device body 1, the rotating shaft of the deflection plate 9 can be less likely to tilt during rotation, making the rotation of the deflection plate 9 more stable.

[0048] When the second positioning block 18 rotates inside the device body 1, the wear between the device body 1 and the second positioning block 18 is reduced by the rolling ball 19 that can roll between the device body 1 and the second positioning block 18.

[0049] When the rotating roller 3 supports the tunneling head and drives the tunneling head to rotate, by setting the rubber pad 20 on the surface of the rotating roller 3, the contact area between the tunneling head and the rotating roller 3 can be increased, making the rotating roller 3 drive the tunneling head to rotate better. At the same time, it can protect the rotating roller 3 and effectively prevent the rotating roller 3 from being scratched and worn.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical device for replacing a cutting head of a pipe-replacement machine, characterized in that: Including device body (1), The side wall of device body (1) is fixed with feeding slope (101), The inside of device body (1) is equipped with fixed frame (2), The inside of fixed frame (2) is rotatably connected with two rotating rollers (3), And two rotating rollers (3) are symmetrically arranged in the inside of fixed frame (2), The rotation of rotating roller (3) is driven by drive motor, The top of device body (1) is fixed with fixed arm (8), The side wall of fixed arm (8) is rotatably connected with deflector plate (9), The top of fixed arm (8) and deflector plate (9) is provided with fixed slot, And the inside of fixed slot is detachably installed with fixed pin (801), The inside of deflector plate (9) is rotatably connected with multiple rotating shafts (10), The side wall of rotating shaft (10) is fixed with multiple knock bars (11), The end of rotating shaft (10) is fixed with synchronous wheel (12), Multiple synchronous wheels (12) are connected with synchronous belt (13), The inside of device body (1) is rotatably connected with second threaded rod (901), The inside of fixed frame (2) is slidably connected at the position of device body (1), The inside of fixed frame (2) is threadedly connected at the position of second threaded rod (901), The side wall of fixed frame (2) is fixed with first positioning block (201), And the inside of device body (1) is slidably connected at the position of first positioning block (201), The bottom of fixed pin (801) is fixed with magnetic block, The bottom position of fixed slot of fixed arm (8) and deflector plate (9) is fixed with fixed magnetic block (802), The magnetic block and fixed magnetic block (802) are correspondingly arranged.

2. A mechanical device for replacing a pipe reamer head of a pipe replacing machine according to claim 1, characterized in that: The inside of fixed frame (2) is slidably connected with two moving blocks (4), The inside of fixed frame (2) is rotatably connected with first threaded rod (5), The threads on first threaded rod (5) are symmetrically arranged along the center line of first threaded rod (5), Two moving blocks (4) are threadedly connected at the positions on the center line of first threaded rod (5), And the positions of two moving blocks (4) are symmetrically arranged, The end of first threaded rod (5) is fixed with drive gear (6), The inside of fixed frame (2) is rotatably connected with driving gear (7), The driving gear (7) is meshingly connected with drive gear (6), The top of driving gear (7) is higher than the top surface of fixed frame (2).

3. A mechanical device for replacing a pipe reamer head of a pipe replacing machine according to claim 1, characterized in that: The inside of deflector plate (9) is provided with blanking groove (14), The bottom of blanking groove (14) is provided with multiple rotating shafts (10), And they are communicated with each other, The inside of device body (1) is provided with blanking through slot (141), The blanking through slot (141) is provided at the position corresponding to the bottom of deflector plate (9), The bottom end of blanking groove (14) is towards the position of blanking through slot (141).

4. A mechanical device for replacing a cutting head of a pipe-replacement jumbo according to claim 3, characterized in that: The knock bar (11) corresponding to the bottom of rotating shaft (10) is fixed with counterweight (15), The counterweight (15) is arranged at the position corresponding to the end of knock bar (11).

5. A mechanical device for replacing a cutting head of a pipe replacing machine according to claim 3, characterized in that: The inside of the device body (1) is fixedly connected with a plurality of positioning rods (16); the positioning rods (16) are arranged in parallel with the second threaded rod (901); the fixing frame (2) is slidingly connected on the positioning rods (16).

6. A mechanical device for replacing a pipe reamer head of a pipe replacing machine according to claim 5, characterized in that: A plurality of anti-abrasion beads (17) are buckle-connected on the bottom of the fixing frame (2); the anti-abrasion beads (17) are linearly and regularly arranged on the bottom of the fixing frame (2).

7. A mechanical device for replacing a cutting head of a pipe replacing machine according to claim 3, characterized in that: A second positioning block (18) is fixedly connected on the pivot of the deflection plate (9); the second positioning block (18) is rotationally connected at the inside position of the device body (1).

8. A mechanical device for replacing a pipe reamer head of a pipe replacing machine according to claim 7, characterized in that: A plurality of balls (19) are arranged between the device body (1) and the second positioning block (18); the side wall of the ball (19) is in contact with the side wall of the device body (1) and the second positioning block (18).

9. A mechanical device for replacing a pipe reamer head of a pipe replacing machine according to claim 1, characterized in that: A rubber gasket (20) is fixedly connected on the outer side wall of the rotating roller (3); the shape and size of the rubber gasket (20) are corresponding to the shape and size of the outer side wall of the rotating roller (3).

Images