A large-size pipe jacking machine rack buffer locking device

Abstract

The present invention belongs to the technical field of steel pipe equipment. Specifically, the present invention relates to a large-scale pipe jacking machine rack buffer locking device, which is located at the tail end of the large-scale pipe jacking machine and includes a buckle, a buffer and a locking seat; the buckle is installed at the tail end of the rack of the large-scale pipe jacking machine, and the rack is meshed with the gear of the large-scale pipe jacking machine; the locking seat is connected to the buffer, and a gap is provided between the locking seat and the socket, the buffer is used to buffer the rack, and the locking seat is used to lock the buckle. The present invention not only provides a buffering function, but also provides a locking function. The buffer can provide buffering for the rack, thereby ensuring that the rack basically does not rebound. At the same time, the locking seat can lock the buckle, thereby locking the rack, so as to avoid the rack from causing damage to equipment and personnel due to excessive kinetic energy when it returns uncontrolled, thereby avoiding the occurrence of safety accidents and ensuring the smooth operation of the rack and the safety of the equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of steel pipe equipment, and in particular relates to a rack buffer locking device for a large-size pipe jacking machine. Background Art

[0002] The rack of a large-sized pipe jacking machine (the rack length of the pipe jacking machine is 40-50 meters and the weight is 54-67 tons) can run at a maximum speed of 5.6m / s when in operation, and the kinetic energy is relatively large when returning. Currently, large springs are mostly used as shock absorbers. This method has a certain buffering effect on small-sized pipe jacking machines. The disadvantage is that the buffering capacity is limited and cannot meet the buffering requirements of the rack of a large-sized pipe jacking machine when working. The reliability of use in large-sized pipe jacking machines is poor.

[0003] After the rack of a large-size pipe jacking machine completes the pipe jacking operation, during the return process, when the return is uncontrolled (for example, the rack is dislocated after the limit is damaged during production, and the rack impacts at the inertial speed when the rack is dislocated; the damage to the pipe jacking transmission coupling causes the rack to freely move and impact the tail stopper), the control of the rack fails, and the free movement during the return will cause a high-speed impact. The spring, as a shock absorber, cannot completely absorb the strong kinetic energy when the rack returns out of control, and may be damaged, broken, or cracked. The spring mounting base may also be deformed and damaged by the collision, or even broken and fly out, damaging the equipment in the rack's retreat direction and endangering the safety of nearby personnel. In addition, the rack may also rebound in the reverse direction by inertia after a forced impact, which can easily cause the rack and transmission gear to hit the teeth, causing equipment damage and accidents. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a large-size pipe jacking machine rack buffer locking device, and its technical solution is as follows:

[0005] A large-scale pipe jacking machine rack buffer locking device is located at the tail end of the large-scale pipe jacking machine, and includes a buckle, a buffer and a locking seat; the buckle is installed at the tail end of the rack of the large-scale pipe jacking machine, and the rack is meshed with the gear of the large-scale pipe jacking machine; the locking seat is connected to the buffer, and a gap is provided between the locking seat and the buckle, the buffer is used to buffer the rack, and the locking seat is used to lock the buckle.

[0006] The large-size pipe jacking machine rack buffer locking device as described above is further preferably: when the rack operates normally, the shortest length of the interval accounts for one twentieth to one sixth of the length of the rack.

[0007] The large-size pipe jacking machine rack buffer locking device as described above is further preferably: further comprising a striker; the striker is installed on the buffer to increase the counterweight and provide an installation position for the locking seat; the locking seat is installed on the striker.

[0008] The large-size pipe jacking machine rack buffer locking device as described above is further preferably: further comprising a base; the base is installed on the ground to provide an installation position for the buffer; the buffer is installed on the base.

[0009] The large-size pipe jacking machine rack buffer locking device as described above is further preferably: a guide rod is provided on the base, and the guide rod is slidably matched with the impact head to provide guidance for the impact head.

[0010] The large-size pipe jacking machine rack buffer locking device as described above is further preferably configured such that: there are multiple buffers, the multiple buffers are arranged side by side and are respectively connected to the rams for synchronous movement under the drive of the rams.

[0011] The large-size pipe jacking machine rack buffer locking device as described above is further preferably configured such that: the buffer is a gas-liquid buffer.

[0012] The large-size pipe jacking machine rack buffer locking device as described above is further preferably configured such that: the locking seat is provided with a locking cavity, the locking cavity is annular, and in the axial direction, the diameter of the locking cavity gradually increases as it approaches the rack.

[0013] The large-size pipe jacking machine rack buffer locking device as described above is further preferably: the locking seat includes an introduction plate, an outer wall tube and a positioning rod; the impact head is provided with a stepped hole, and the positioning rod, the outer wall tube and the introduction plate are sequentially installed in the stepped hole; the positioning rod is provided with a snap-on convex ring, and the snap-on convex ring is snapped in the stepped hole; the outer wall tube abuts against the snap-on convex ring, and the inner diameter of the outer wall tube gradually increases as it approaches the rack; the introduction plate is provided with an introduction hole, the diameter of the introduction hole is larger than the inner diameter of the outer wall tube, and the introduction hole is provided with a conical surface for providing guidance for the entry of the buckle.

[0014] The large-size pipe jacking machine rack buffer locking device as described above is further preferably: the buckle is columnar, including a mounting portion and a plug-in portion; the mounting portion is used to be mounted on the tail end of the rack of the large-size pipe jacking machine, and the plug-in portion is used to be plugged and matched with the locking seat; the plug-in portion includes a plug-in wall and a plug-in hole; the plug-in wall is cylindrical, and the outer diameter gradually increases as it approaches the rack, and is used to deform during impact; the plug-in hole is provided in the plug-in wall, and the plug-in hole is used to cooperate with the positioning rod to guide and lock the plug-in wall.

[0015] The large-size pipe jacking machine rack buffer locking device as described above is further preferably: a recessed groove is provided on the plug-in wall, and the length direction of the recessed groove is along the axial direction of the buckle; there are multiple recessed grooves, which are distributed in a circular array on the plug-in wall.

[0016] It can be seen from the analysis that compared with the prior art, the advantages and beneficial effects of the present invention are:

[0017] The large-size pipe jacking machine rack buffer locking device of the present invention can provide not only a buffering function but also a locking function when in use. When out of control or stalling occurs, the buffer can provide buffering for the rack. The buffer is a gas-liquid buffer with good buffering effect and strong buffering capacity, thereby ensuring that the rack basically does not rebound; at the same time, the buckle can be deformed under the action of the impact force. The greater the impact force, the more obvious the buckle deformation, and the better the locking effect of the locking seat on the buckle, thereby being able to lock the rack to prevent the rack from causing damage to equipment and personnel due to excessive kinetic energy when returning uncontrolled, thereby avoiding the occurrence of safety accidents and ensuring the smooth operation of the rack and the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the spatial layout of the rack buffer locking device of a large-sized pipe jacking machine.

[0019] Figure 2 It is a top view of the rack buffer locking device of a large-sized pipe jacking machine.

[0020] Figure 3 for Figure 2 A partial enlarged view of point A.

[0021] Figure 4 It is a schematic diagram of the structure of the buckle (partially cut away).

[0022] Figure 5 It is a side view of the buckle (along the opening direction of the plug hole).

[0023] In the figure: 1-gear; 2-rack; 3-introduction plate; 4-buckle; 5-locking seat; 6-ram; 7-guide rod; 8-buffer; 9-base; 10-outer wall tube; 11-positioning rod; 12-installation part; 13-plug-in part; 14-plug-in hole; 15-plug-in wall; 16-sink. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] Please refer to Figures 1 to 5 ,in, Figure 1 This is a schematic diagram of the spatial arrangement of the rack buffer locking device of a large-size pipe jacking machine; Figure 2 It is a top view of the rack buffer locking device of a large-size pipe jacking machine; Figure 3 for Figure 2 A local enlarged view at point A; Figure 4 It is a schematic diagram of the structure of the buckle (partial cutaway); Figure 5 It is a side view of the buckle (along the opening direction of the plug hole).

[0027] The present invention provides a large-scale pipe jacking machine rack buffer locking device, which is located at the tail end of the large-scale pipe jacking machine and mainly includes a buckle 4, a buffer 8 and a locking seat 5. Specifically, in the large-scale pipe jacking machine, there are a gear 1 and a rack 2, and the rack 2 is meshed with the gear 1 for transmission. The buckle 4 is installed at the tail end of the rack 2 and moves with the rack 2. The buffer 8 is installed at a certain distance from the tail end of the rack 2 and is connected to the locking seat 5. The locking seat 5 is aligned with the buckle 4, so that a gap is provided between the locking seat 5 and the buckle 4, and they can be aligned with each other. When in use, the buffer 8 is used to buffer the rack 2, and the locking seat 5 is used to lock the buckle 4.

[0028] In the present invention, not only a buffering function but also a locking function is provided. After the large-size pipe jacking machine completes the pipe jacking operation, if the rack 2 is out of control or stalled during its return, the buffer 8 can provide buffering for the rack 2, with good buffering effect and strong buffering capacity, thereby ensuring that the rack 2 basically does not rebound. At the same time, the locking seat 5 can lock the buckle 4, thereby locking the rack 2 to prevent the rack 2 from causing damage to equipment and personnel due to excessive kinetic energy when returning uncontrolled, thereby avoiding the occurrence of safety accidents and ensuring the stable operation of the rack 2 and the safety of the equipment.

[0029] Furthermore, in the present invention, when the rack 2 operates normally, the shortest length of the interval (L) is one twentieth to one sixth of the length of the rack 2, so as not to affect the normal operation of the rack 2, and can play a buffering and locking role when the rack 2 is out of control.

[0030] Furthermore, the present invention further includes a striker 6, which is mounted on the buffer 8, and the locking seat 5 is mounted on the striker 6. One function of the striker 6 is to provide a mounting position for the locking seat 5; the second function of the striker 6 is to add a counterweight to the buffer 8 to reduce the speed of the buffer 8 when it is impacted.

[0031] Furthermore, in the present invention, a base 9 is further included, the base 9 is installed on the ground, and the buffer 8 is installed on the base 9. The base 9 can provide an installation position for the buffer 8, which is convenient for the installation and fixing of the buffer 8.

[0032] Furthermore, in the present invention, a guide rod 7 is provided on the base 9, and the guide rod 7 is slidably matched with the impact head 6, which can provide a guide for the impact head 6 when sliding, so as to prevent the impact head 6 from deviating during operation and causing damage to the buffer 8. As a preferred solution, in the present invention, a track is also provided on the base 9, and the track is also used to provide a sliding guide for the impact head 6, and the guiding direction of the track is consistent with the guiding direction of the guide rod 7, so that a double insurance mechanism can be formed to ensure the sliding track of the impact head 6.

[0033] Furthermore, in the present invention, in order to ensure the buffering effect, the buffer 8 is a gas-liquid buffer. When the gear 1 and the rack 2 fail to control and the rack 2 is disengaged from the gear 1, the rack 2 hits the locking seat 5 at the inertial speed when the gear is disengaged. The locking seat 5 compresses the gas-liquid buffer 8 through the impact head 6, which can ensure that the rack 2 stops effectively and has a good buffering effect. In addition, the buffer 8 is set to be multiple, for example, it can be two, three, four, etc., preferably two. When there are two buffers 8, the two buffers 8 are arranged side by side and are respectively connected to the impact head 6, and can move synchronously under the drive of the impact head 6.

[0034] Furthermore, in the present invention, the locking seat 5 is provided with a locking cavity, which is annular, and in the axial direction, the diameter of the locking cavity gradually increases as it approaches the rack. When the buckle 4 hits the locking seat 5, the locking cavity can provide a guide for the buckle 4 to enter, and at the same time facilitates the buckle 4 to deform and get stuck in the locking cavity.

[0035] Furthermore, in the present invention, the locking seat 5 includes an introduction plate 3, an outer wall tube 10 and a positioning rod 11. A stepped hole is provided on the impact head 6, and the positioning rod 11, the outer wall tube 10 and the introduction plate 3 are sequentially installed in the stepped hole. The positioning rod 11 is provided with a snap-on convex ring, which is snap-on in the stepped hole to prevent the positioning rod 11 from falling out and injuring people. The outer wall tube 10 abuts against the snap-on convex ring, and the inner diameter of the outer wall tube 10 gradually increases as it approaches the rack, and can guide the buckle 4 to gradually deform when the buckle 4 enters. An introduction hole is provided on the introduction plate 3, and the diameter of the introduction hole is larger than the inner diameter of the outer wall tube 10, so that the buckle 4 can enter conveniently. A conical surface is provided on the introduction hole to provide guidance for the entry of the buckle 4. When the buckle 4 hits the locking cavity, the buckle 4 is squeezed by the positioning rod 11 inside and by the outer wall tube 10 outside, so that it is deformed under the action of the impact force, and can be stuck in the locking cavity, so that the locking seat 5 can lock the rack 2. In addition, the greater the impact force, the more obvious the deformation (expansion) of the buckle 4, the better the locking effect of the locking seat 5, and the reliable locking can effectively prevent the rack 2 from rebounding and hitting the gear 1, causing the rack 2 and the gear 1 to break, thereby ensuring the safety of equipment and personnel.

[0036] Furthermore, in the present invention, the buckle 4 is columnar, including a mounting portion 12 and a plug-in portion 13. The mounting portion 12 is installed at the tail end of the rack 2 of the large-size pipe jacking machine when in use, and the plug-in portion 13 is used to plug and cooperate with the locking seat 5 when in use. Specifically, the plug-in portion 13 includes a plug-in wall 15 and a plug-in hole 14; the plug-in wall 15 is cylindrical, and the outer diameter gradually increases as it approaches the rack 2, so as to facilitate entry into the locking cavity, and the plug-in wall 15 is used to deform when impacted. A plug-in hole 14 is provided in the plug-in wall 15, and the plug-in hole 14 is used to cooperate with the positioning rod 11 to play a guiding role, and at the same time can lock the plug-in wall 15. The outer diameter of the plug-in hole 14 does not exceed the outer diameter of the positioning rod 11, and the outer diameter of the plug-in wall 15 is not less than the inner diameter of the outer wall tube 10. When the buckle 4 collides with the locking seat 5, the plug-in hole 14 is gradually inserted into the positioning rod 11 and is gradually expanded by the positioning rod 11; the plug-in wall 15 gradually enters the locking cavity (between the positioning rod 11 and the outer wall tube 10) and is gradually compressed by the outer wall tube 10. Therefore, the plug-in wall 15 is deformed under the joint action of the positioning rod 11 and the outer wall tube 10, and the greater the impact force, the greater the deformation, which can ensure the locking effect.

[0037] Furthermore, in the present invention, a recessed groove 16 is provided on the plug-in wall 15, and the length direction of the recessed groove 16 is along the axial direction of the plug buckle 4. The design of the recessed groove 16 can not only ensure the integrity of the plug-in wall 15, but also facilitate the deformation of the plug-in wall 15, and also provide a deformation space for the deformation of the plug-in wall 15. As a preferred solution, there are multiple recessed grooves 16, which are distributed in a circumferential array on the plug-in wall 15, which can ensure that the force on the plug-in wall 15 in the radial direction is reasonably distributed.

[0038] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A large-size pipe jacking machine rack buffer locking device, located at the tail end of the large-size pipe jacking machine, characterized in that: include: Buckles, buffers, locking seats and impact heads; The buckle is installed at the tail end of the rack of the large-size pipe jacking machine, and the rack is meshed with the gear of the large-size pipe jacking machine; The locking seat is connected to the buffer, and a gap is provided between the locking seat and the buckle. The buffer is used to buffer the rack, and the locking seat is used to lock the buckle. The locking seat is provided with a locking cavity, which is in a circular ring shape. In the axial direction, the diameter of the locking cavity gradually increases as it approaches the rack. The locking seat comprises an introduction plate, an outer wall tube and a positioning rod; The impact head is installed on the buffer, and a stepped hole is provided on the impact head, and the positioning rod, the outer wall tube, and the introduction plate are installed in the stepped hole in sequence; The positioning rod is provided with a clamping convex ring, and the clamping convex ring is clamped in the stepped hole; The outer wall tube abuts against the clamping convex ring, and the inner diameter of the outer wall tube gradually increases as it approaches the rack; The introduction plate is provided with an introduction hole, the diameter of which is larger than the inner diameter of the outer wall tube, and the introduction hole is provided with a conical surface for providing guidance for the entry of the buckle. Also includes a base; The base is installed on the ground to provide an installation position for the buffer; The buffer is mounted on the base.

2. The large-size pipe jacking machine rack buffer locking device according to claim 1 is characterized in that: When the rack operates normally, the shortest length of the interval accounts for one twentieth to one sixth of the length of the rack.

3. The large-size pipe jacking machine rack buffer locking device according to claim 1 is characterized in that: The impact head is used to increase the counterweight and provide an installation position for the locking seat; The locking seat is mounted on the impact head.

4. The large-size pipe jacking machine rack buffer locking device according to claim 1 is characterized in that: The buckle is deformed under the action of the impact force.

5. The large-size pipe jacking machine rack buffer locking device according to claim 4 is characterized in that: A guide rod is provided on the base, and the guide rod is slidably matched with the impact head to provide guidance for the impact head.

6. The large-size pipe jacking machine rack buffer locking device according to claim 3 is characterized in that: There are multiple buffers, which are arranged side by side and respectively connected to the impact heads, so as to move synchronously under the drive of the impact heads; The buffer is a gas-liquid buffer.

7. The large-size pipe jacking machine rack buffer locking device according to claim 1 is characterized in that: The buckle is columnar and comprises a mounting portion and an inserting portion; The mounting portion is used to be mounted on the tail end of the rack of the large-size pipe jacking machine, and the plug-in portion is used to be plugged and matched with the locking seat; The plug-in portion comprises a plug-in wall and a plug-in hole; The plug-in wall is cylindrical, and the outer diameter gradually increases as it approaches the rack, so as to deform when impacted; The inserting hole is arranged in the inserting wall, and the inserting hole is used to cooperate with the positioning rod to guide and lock the inserting wall.

8. The large-size pipe jacking machine rack buffer locking device according to claim 7 is characterized in that: A recessed groove is provided on the plug-in wall, and the length direction of the recessed groove is along the axial direction of the plug buckle; There are multiple sinks, which are distributed in a circular array on the plug-in wall.

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