阅读说明：本技术 一种用于空调配管加工的钻孔机 (Drilling machine for machining air conditioner pipe ) 是由 张子文 于 2021-10-15 设计创作，主要内容包括：本发明公开了一种用于空调配管加工的钻孔机,涉及空调配件加工设备技术领域,包括机箱,所述机箱内固定连接有两个放置架,其中待加工配管放置在两个放置架上,所述机箱内顶部安装有移动气缸,所述移动气缸输出端固定连接有安装架,所述安装架内安装有钻孔电机,所述钻孔电机输出端同轴固定连接有钻头,所述机箱内底部设置有夹持机构,本发明在对配管进行钻孔时,钻头高速转动并逐渐向下移动对配管形成摩擦热熔钻孔；并且在安装架向下移动过程中,通过限位杆驱动螺纹杆转动,最终使两个夹持块夹持在配管两侧上,两个夹持块合拢后构成环形,从而对配管形成全包覆式的接触效果,增大对配管的夹持效果,且避免局部对配管挤压过度。(The invention discloses a drilling machine for machining air-conditioning piping, which relates to the technical field of air-conditioning accessory machining equipment and comprises a case, wherein two placing racks are fixedly connected in the case, the piping to be machined is placed on the two placing racks, a movable air cylinder is installed at the top in the case, the output end of the movable air cylinder is fixedly connected with an installing frame, a drilling motor is installed in the installing frame, the output end of the drilling motor is coaxially and fixedly connected with a drill bit, and a clamping mechanism is arranged at the bottom in the case; and in the downward moving process of the mounting rack, the threaded rod is driven to rotate through the limiting rod, the two clamping blocks are clamped on the two sides of the distribution pipe finally, and the two clamping blocks form an annular shape after being folded, so that the fully-coated contact effect on the distribution pipe is achieved, the clamping effect on the distribution pipe is improved, and the local excessive extrusion on the distribution pipe is avoided.)

1. A drilling machine for machining air conditioner piping comprises a machine case (1), wherein two placing frames are fixedly connected in the machine case (1), and a piping to be machined is placed on the two placing frames, and is characterized in that a movable air cylinder (2) is installed at the top in the machine case (1), an installation frame (3) is fixedly connected at the output end of the movable air cylinder (2), a drilling motor (4) is installed in the installation frame (3), a drill bit (41) is coaxially and fixedly connected at the output end of the drilling motor (4), a clamping mechanism (5) is arranged at the bottom in the machine case (1), the clamping mechanism (5) comprises a threaded rod (51), a connecting block (52) and a clamping block (53), the threaded rod (51) is rotatably connected in the bottom of the machine case (1), the two ends of the threaded rod are both in threaded connection with the connecting block (52), and the tops of the two connecting blocks (52) are both fixedly connected with the clamping block (53), two relative one side of grip block (53) has all been seted up half annular (531) and has been leaned on and lean on piping periphery side, two drilling (532) of seting up clearance fit drill bit (41) on grip block (53), ring channel (31) have been seted up on mounting bracket (3), top fixedly connected with spacing spring (32) in ring channel (31), ring channel (31) one end fixedly connected with protection casing (33) are kept away from in spacing spring (32), protection casing (33) top sliding connection just bottom both sides are equal fixedly connected with gag lever post (34) in ring channel (31), two gag lever post (34) bottom respectively with two threaded rod (51) intermeshing, two fixedly connected with drive rack (341) on gag lever post (34), coaxial rotation tooth's socket (511) of having seted up on threaded rod (51), drive rack (341) and rotation tooth's socket (511) intermeshing, the threaded rod (51) is opposite to the threaded connection part of the two connecting blocks (52) in the spiral direction and has the same thread pitch.

2. The drilling machine for machining air conditioner piping according to claim 1, wherein a plurality of the limiting springs (32) are distributed in the annular groove (31) in a circular array, and the deformation displacement is larger than the thickness of the pipe to be drilled.

3. The drilling machine for machining the air conditioner piping according to claim 1, wherein the protective cover (33) is arranged coaxially with the drill bit (41), a vent hole is formed in one side of the top of the protective cover, an arc-shaped groove is formed in the bottom of the protective cover (33) along the axial direction of the piping, and the inner diameter of the arc-shaped groove is equal to the outer diameter of the clamping block (53).

4. The drilling machine for processing the air-conditioning piping as claimed in claim 1, wherein a strip-shaped groove (521) is formed in the connecting block (52), the limiting rod (34) is rectangular, and the middle part of the limiting rod is slidably connected in the strip-shaped groove (521).

5. The drilling machine for machining the air-conditioning piping according to claim 1, characterized in that an auxiliary mechanism (6) is further arranged in the machine case (1), the auxiliary mechanism (6) comprises a limiting groove (61), a sealing slider (62) and a half-ring cavity (64), the two limiting grooves (61) are formed in the inner bottom of the machine case (1) and are in clearance fit with the vertical projections of the two limiting rods (34), the sealing slider (62) is connected in the limiting groove (61) in a sealing and sliding manner, a return spring (621) is fixedly connected between the lower surface of the sealing slider (62) and the inner bottom of the limiting groove (61), the bottom of the limiting groove (61) is communicated with a communicating pipe (63), one end, away from the limiting groove (61), of the communicating pipe (63) is communicated with the half-ring cavity (64), the half-ring cavity (64) is formed in the clamping block (53), and the half-ring cavity (64) is arranged coaxially with the half-ring groove (531), wherein the bottom of the limit groove (61), the communicating pipe (63) and the semi-ring cavity (64) are all filled with water.

6. The drilling machine for machining the air conditioner piping according to claim 5, wherein the elastic coefficient of the return spring (621) is smaller than that of the limiting spring (32), and the distance between the bottom end of the limiting rod (34) and the upper surface of the sealing slider (62) is equal to the distance between the bottom of the drill bit (41) and the top of the piping.

7. The drilling machine for machining air conditioner piping according to claim 5, wherein the communication pipe (63) is made of a hose having a deformation capability in an axial direction, and hard joints are provided at both ends of the communication pipe (63) and are communicated with the limit groove (61) and the semi-ring cavity (64) through the hard joints.

Technical Field

The invention relates to the technical field of air conditioner accessory processing equipment, in particular to a drilling machine for processing air conditioner tubing.

Background

The air-conditioning tubing is a thin-walled tube and is easily deformed during processing. The traditional cutting type drilling hole has lower hole wall strength after drilling, and influences the installation strength of the piping. Therefore, the hot-melt drill is generally used for drilling, so that the acting force on the pipe wall during drilling is reduced, the strength of the hole wall is improved, and the drilling quality of the piping is improved. However, the traditional hot-melting drill drilling mode is poor in fixing effect on the pipe, and the pipe is easy to vibrate in the drilling process to cause drilling errors, so that the drilling quality is affected.

Through retrieval, the granted patent of chinese invention with application number CN201910488367.5 discloses a hot-melt drilling device for air-conditioning tubing, which comprises a machine body and an operation cavity arranged in the machine body, wherein a through hole … … penetrating through the operation cavity is arranged in the machine body, and the machine body forms a clamping effect on tubing through two driving wheels, in this way, the contact area between the driving wheels and the tubing is small, the clamping and fixing effect on the tubing is poor, the extrusion acting force on the tubing is large when the tubing is clamped, the tubing is easy to deform when the tubing is subjected to hot-melt drilling, and the drilling quality of the tubing is influenced; meanwhile, the drill bit is positioned in an open space during hot melting drilling, so that the heat dissipation speed during hot melting drilling is increased, and the efficiency of hot melting drilling is influenced; and when the driving wheel or the traditional extrusion block extrudes and clamps the tubing, the direction of extrusion acting force on the tubing is unidirectional, so that the tubing is easy to generate distortion along the direction of the acting force in the processing process, and the drilling quality of the tubing is influenced.

Disclosure of Invention

The invention provides a drilling machine for processing an air conditioner pipe, and aims to solve the problem that the clamping and fixing effect of a pipe is poor due to the fact that the contact area between a driving wheel and the pipe is small in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a drilling machine for processing air conditioner piping comprises a machine case, wherein two placing frames are fixedly connected in the machine case, the piping to be processed is placed on the two placing frames, a movable air cylinder is installed at the top in the machine case, the output end of the movable air cylinder is fixedly connected with a mounting frame, a drilling motor is installed in the mounting frame, the output end of the drilling motor is coaxially and fixedly connected with a drill bit, a clamping mechanism is arranged at the bottom in the machine case and comprises a threaded rod, a connecting block and clamping blocks, the threaded rod is rotatably connected in the bottom of the machine case, the two ends of the threaded rod are both in threaded connection with the connecting block, the tops of the two connecting blocks are both fixedly connected with the clamping blocks, one side of the two clamping blocks, which is opposite to each other, is provided with a semicircular groove and is abutted against the outer peripheral side of the piping, the two clamping blocks are provided with drill holes in clearance fit with the drill bit, and the mounting frame is provided with a circular groove, top fixedly connected with spacing spring in the ring channel, spacing spring keeps away from ring channel one end fixedly connected with protection casing, protection casing top sliding connection just the equal fixedly connected with gag lever post in bottom both sides in the ring channel, two gag lever post bottom respectively with two threaded rod intermeshing, wherein spacing tank bottom, communicating pipe and semi-ring intracavity all fill water.

Preferably, it is a plurality of spacing spring is circular array distribution in the ring channel, and the deformation displacement volume is greater than the piping and treats drilling thickness, improves the contact pressure of protection casing and grip block and connecting block, improves the leakproofness in the space that the three encloses, and the heat formation that produces drill bit hot melt drilling is restrainted the effect, avoids the too fast efficiency that influences hot melt drilling of dispelling the heat.

Preferably, the protection casing and the drill bit are coaxially arranged, a vent hole is formed in one side of the top of the protection casing, the phenomenon that the temperature inside the protection casing is too high and the air pressure inside the protection casing is too high is avoided, an arc-shaped groove is formed in the bottom of the protection casing along the axial direction of the tubing, the inner diameter of the arc-shaped groove is equal to the outer diameter of the clamping block, the sealing effect of the space in the protection casing is further improved, meanwhile, a further limiting effect is formed on the two clamping blocks, and the fixing effect of the protection casing on the tubing is improved.

Preferably, two fixedly connected with drive rack on the gag lever post, the coaxial rotation tooth's socket of having seted up on the threaded rod, drive rack and rotation tooth's socket intermeshing, the threaded rod is opposite with two connecting block threaded connection portion screw direction and the pitch equals, makes two connecting blocks move in opposite directions after the threaded rod rotates to make two grip blocks support and lean on the piping.

Preferably, the connecting block is provided with a strip-shaped groove, the limiting rod is in a cuboid shape, the middle part of the limiting rod is connected in the strip-shaped groove in a sliding mode, a further limiting effect is formed on the connecting block, and the fixing effect of the connecting block on the piping is prevented from being influenced by bending deformation of the limiting rod.

Preferably, an auxiliary mechanism is further arranged in the case, the auxiliary mechanism comprises limit grooves, a sealing slide block and a semi-ring cavity, the two limit grooves are formed in the bottom in the case, and is in clearance fit with the vertical projections of the two limit rods, a sealing slide block is connected in the limit groove in a sealing and sliding way, a return spring is fixedly connected between the lower surface of the sealing slide block and the bottom in the limiting groove, the bottom of the limiting groove is communicated with a communicating pipe, one end of the communicating pipe, which is far away from the limiting groove, is communicated with a semi-ring cavity, the semi-ring cavity is arranged in the clamping block, the semi-ring cavity and the semi-ring groove are coaxially arranged, and the hydraulic pressure transmission characteristic is utilized, the acting force of each position in the semi-annular cavity is the same, so that the direction of the extrusion acting force of the clamping block on the tubing is changed, the extrusion acting force of the clamping block on the tubing is uniformly distributed, the deformation of the tubing in the processing process is further avoided, and the drilling quality of the tubing is improved.

Preferably, the elastic coefficient of the reset spring is smaller than that of the limiting spring, the sealing slide block is limited, and meanwhile large resistance is prevented from being formed on the reset spring, wherein the distance between the bottom end of the limiting rod and the upper surface of the sealing slide block is equal to the distance between the bottom of the drill bit and the top of the tubing, and the deformation acting force of the reset spring is conveniently transmitted to the water in the semi-ring cavity.

Preferably, the communicating pipe is made of a hose, wherein the hose has deformation capacity along the axial direction, and hard joints are arranged at two ends of the communicating pipe and communicated with the limiting groove and the semi-ring cavity through the hard joints.

Compared with the prior art, the invention has the following beneficial effects:

1. when the drilling machine is used for drilling the tubing, the movable air cylinder and the drilling motor work to drive the drill bit to rotate at a high speed and gradually move downwards to form high-speed friction on the tubing, so that the tubing is subjected to hot melting drilling, and compared with the traditional cutting type drilling, the friction hot melting drilling can reduce the deformation degree of the tubing during processing and improve the strength of the tubing; and in the downward movement process of the mounting rack, the limiting rod moves along with the mounting rack to drive the threaded rod to rotate, finally, the two clamping blocks move oppositely and are clamped on the two sides of the distribution pipe, and the two clamping blocks form a ring after being folded, so that a full-coating contact effect is formed on the distribution pipe, the contact area with the distribution pipe is increased, the static friction force with the distribution pipe is increased, the clamping effect on the distribution pipe is increased, and the local excessive extrusion on the distribution pipe is avoided.

2. When the drill bit gradually penetrates into the pipe, the output end of the movable cylinder continues to extend, the mounting frame and the limiting spring in the annular groove are extruded, the contact pressure between the bottom of the protective cover and the connecting block and the two clamping blocks is improved, the sealing effect of the internal space of the protective cover is improved, the bundling effect is formed on heat generated by hot-melting drilling of the drill bit, and the influence on the efficiency of the hot-melting drilling due to too fast heat dissipation is avoided.

3. When the limiting spring is compressed, the limiting rod forms extrusion acting force on the sealing slide block in the limiting groove, so that the water pressure in the bottom of the limiting groove, the communicating pipe and the semi-ring cavity is increased, the acting force on each part in the semi-ring cavity is the same due to the hydraulic pressure transmission characteristic, the extrusion acting force of the clamping block on the tubing is uniformly distributed, the deformation of the tubing caused by uneven distribution of the fixed acting force in the hot melting drilling process is effectively avoided, and the quality of the tubing after processing is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of part A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is a front schematic view of the shield of the present invention;

FIG. 5 is a schematic top view of a connector block of the present invention.

In the figure: the drilling machine comprises a machine case 1, a movable cylinder 2, a mounting frame 3, an annular groove 31, a limiting spring 32, a protective cover 33, a limiting rod 34, a driving rack 341, a drilling motor 4, a drill bit 41, a clamping mechanism 5, a threaded rod 51, a rotating tooth groove 511, a connecting block 52, a strip-shaped groove 521, a clamping block 53, a semi-annular groove 531, a drilling hole 532, an auxiliary mechanism 6, a limiting groove 61, a sealing sliding block 62, a reset spring 621, a communicating pipe 63 and a semi-annular cavity 64.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, a drilling machine for processing air conditioner piping comprises a case 1, wherein two placing frames are fixedly connected in the case 1, a to-be-processed piping is placed on the two placing frames, rubber pads are fixedly connected to the two placing frames, friction force between the placing frames and the piping is improved, deviation of the piping before processing is reduced, and accuracy in subsequent clamping of the piping is facilitated.

The movable cylinder 2 is installed at the top in machine case 1, 2 output end fixedly connected with mounting bracket 3 of movable cylinder, install drilling motor 4 in the mounting bracket 3, the coaxial fixedly connected with drill bit 41 of 4 output ends of drilling motor, movable cylinder 2 works, the extension of its output end, make things convenient for drill bit 41 to deepen gradually and bore through its formation in the piping, drilling motor 4 works, its output end rotates, it rotates to drive 41 high-speed rotations of drill bit and forms high-speed friction to the piping, make the piping by hot melt drilling, compare in traditional cutting formula drilling, the deformation degree of piping when friction hot melt drilling can reduce to add man-hour, improve the intensity of piping.

The clamping mechanism 5 is arranged at the bottom in the case 1, and the clamping mechanism 5 has a coating type clamping effect on the pipe, so that the contact area with the pipe is increased, the static friction force with the pipe is increased, the clamping effect on the pipe is increased, and the pipe is prevented from being excessively extruded locally.

The clamping mechanism 5 comprises a threaded rod 51, connecting blocks 52 and clamping blocks 53, the threaded rod 51 is rotatably connected in the bottom of the case 1, the connecting blocks 52 are in threaded connection at two ends, the clamping blocks 53 are fixedly connected to the tops of the two connecting blocks 52, the threaded rod 51 is opposite to the threaded connection parts of the two connecting blocks 52 in spiral direction, the thread pitches of the threaded rod 51 and the two connecting blocks 52 are equal, and after the threaded rod 51 rotates, the two connecting blocks 52 connected to the threaded rod move in opposite directions, so that the two clamping blocks 53 are abutted to the periphery side of the distribution pipe.

Opposite sides of the two clamping blocks 53 are provided with semi-annular grooves 531 and abutted to the outer periphery of the pipe, the inner diameter of each semi-annular groove 531 is equal to the outer diameter of the pipe, and the two clamping blocks 53 are folded to form an annular shape, so that a full-coating contact effect is formed on the pipe, and the fixing effect on the pipe is improved.

The two clamping blocks 53 are provided with drill holes 532 which are in clearance fit with the drill bit 41, so that the drill bit 41 can conveniently penetrate through the clamping blocks 53 to perform hot melting drilling on the pipe.

Annular groove 31 has been seted up on mounting bracket 3, the spacing spring 32 of top fixedly connected with in the annular groove 31, a plurality of spacing springs 32 are circular array and distribute in annular groove 31, and the deformation displacement volume is greater than the piping and treats drilling thickness, spacing spring 32 keeps away from annular groove 31 one end fixedly connected with protection casing 33, protection casing 33 top sliding connection is in annular groove 31, when protection casing 33 downstream contacts with grip block 53 and connecting block 52, drill bit 41 removes and high-speed the rotation begins to carry out the hot melt drilling to the piping, spacing spring 32 is compressed gradually and can not form the hindrance this moment, improve the contact pressure of protection casing 33 and grip block 53 and connecting block 52 simultaneously, improve the leakproofness in the space that the three encloses, the effect is restrainted to the heat formation that drill bit 41 hot melt drilling produced, avoid the too fast efficiency that influences the hot melt drilling of dispelling the heat.

The protection casing 33 and the drill bit 41 are coaxially arranged, the top one side is provided with the vent hole, the phenomenon that the internal temperature is too high and the air pressure is too large is avoided, the bottom of the protection casing 33 is provided with an arc-shaped groove along the axial direction of the tubing, the inner diameter of the arc-shaped groove is equal to the outer diameter of the clamping blocks 53, after the two clamping blocks 53 are folded, the arc-shaped groove is matched with the two clamping blocks 53, the sealing effect of the inner space of the protection casing 33 is further improved, meanwhile, a further limiting effect is formed on the two clamping blocks 53, and the fixing effect of the protection casing on the tubing is improved.

The equal fixedly connected with gag lever post 34 in protection casing 33 bottom both sides, two gag lever post 34 bottom respectively with two threaded rod 51 intermeshing, fixedly connected with drive rack 341 on two gag lever posts 34, threaded rod 51 is gone up the coaxial rotation tooth's socket 511 of having seted up, drive rack 341 and rotation tooth's socket 511 intermeshing, gag lever post 34 moves down along with protection casing 33, drive rack 341 forms the promotion effect to the rotation tooth's socket 511 on the threaded rod 51 and makes it rotate on it, threaded rod 51 rotates and makes two connecting blocks 52 move in opposite directions, finally makes two grip blocks 53 centre gripping on the piping.

Seted up bar groove 521 on the connecting block 52, gag lever post 34 is the cuboid form, and middle part sliding connection is in bar groove 521, and gag lever post 34 stretches into bar groove 521 one end to after connecting block 52 removes, gag lever post 34 is located the bar groove 521 other end, through bar groove 521 and gag lever post 34's cooperation, forms further spacing effect to connecting block 52, avoids its bending deformation to influence the fixed effect to the piping.

The auxiliary mechanism 6 is further arranged in the case 1, and the auxiliary clamping mechanism 5 changes the distribution of the acting force of the clamping block 53 on the pipe extrusion, so that the pipe extrusion acting force is distributed along the radial direction of the pipe, the fixing effect on the pipe is further improved, the deformation of the pipe caused by uneven distribution of the fixing acting force in the hot melting drilling process is effectively avoided, and the quality of the pipe after processing is improved.

The auxiliary mechanism 6 comprises a limiting groove 61, a sealing slide block 62 and a half ring cavity 64, wherein the two limiting grooves 61 are arranged at the bottom in the case 1, and are in clearance fit with the vertical projections of the two limiting rods 34, the sealing slide block 62 is connected in the limiting groove 61 in a sealing and sliding manner, a reset spring 621 is fixedly connected between the lower surface of the sealing slide block 62 and the bottom in the limiting groove 61, the elastic coefficient of the reset spring 621 is smaller than that of the limiting spring 32, when the sealing slide block 62 is limited, the reset spring 621 is prevented from forming large resistance.

The bottom of the limiting groove 61 is communicated with a communicating pipe 63, one end of the communicating pipe 63 far away from the limiting groove 61 is communicated with a semi-ring cavity 64, the semi-ring cavity 64 is arranged in the clamping block 53, the semi-ring cavity 64 and the semi-ring groove 531 are coaxially arranged, wherein the bottom of the limit groove 61, the communicating pipe 63 and the semi-ring cavity 64 are all filled with water, the limit rod 34 moves downwards to be in contact with the sealing slide block 62, wherein the distance between the bottom end of the limiting rod 34 and the upper surface of the sealing slide block 62 is equal to the distance between the bottom of the drill bit 41 and the top of the piping, during drilling, the limiting spring 32 starts to be compressed, so that the water pressure in the bottom of the limiting groove 61, the communicating pipe 63 and the half ring cavity 64 is increased, thereby, the semi-ring cavity 64 forms a hydraulic acting force on the clamping block 53, and due to the pressure transmission characteristic of the hydraulic pressure, the forces applied to the parts in the semi-annular cavity 64 are the same, so that the direction of the extrusion force of the clamping block 53 on the pipe is changed, and the extrusion force of the clamping block 53 on the pipe is uniformly distributed.

The communicating pipe 63 is made of a hose, wherein the hose has deformation capacity along the axial direction, the two ends of the communicating pipe 63 are respectively provided with a hard joint and are communicated with the limiting groove 61 and the semi-ring cavity 64 through the hard joints, the communicating effect is still kept through the hose in the moving process of the connecting block 52 and the clamping block 53, and a good hydraulic transmission effect is kept.

When drilling the piping, the piping to be processed is placed on two placing racks, the movable cylinder 2 and the drilling motor 4 are started, the movable cylinder 2 works, the output end of the movable cylinder extends to enable the mounting rack 3 to move downwards, the drilling motor 4 in the movable cylinder is driven to move downwards, the drilling motor 4 works, the output end of the movable cylinder rotates, the drill bit 41 is driven to rotate at a high speed to form high-speed friction on the piping, the piping is drilled by hot melting, and compared with the traditional cutting type drilling, the deformation degree of the piping during processing can be reduced by friction hot melting drilling, and the strength of the piping is improved;

when the mounting frame 3 moves downwards until the drill bit 41 starts to contact the piping, the protective cover 33 connected in the mounting frame 3 moves downwards along with the mounting frame, the driving rack 341 on the protective cover pushes the rotating tooth groove 511 on the threaded rod 51 to rotate, the threaded rod 51 rotates to enable the two connecting blocks 52 connected on the threaded rod 51 to move oppositely, the two clamping blocks 53 connected with the connecting blocks 52 are clamped on two sides of the piping, and the two clamping blocks 53 are folded to form a ring shape, so that the fully-covered contact effect on the piping is achieved, the contact area with the piping is increased, the static friction force with the piping is increased, the clamping effect on the piping is increased, and the excessive partial extrusion on the piping is avoided;

when the drill bit 41 continues to extend along with the output end of the moving cylinder 2 and starts to rotate at a high speed to perform friction hot melting drilling on the pipe, the mounting frame 3 and the limiting spring 32 in the annular groove 31 are extruded, so that the contact pressure between the bottom of the protective cover 33 and the connecting block 52 and the two clamping blocks 53 is improved, the sealing effect of the internal space is improved, the heat generated by the hot melting drilling of the drill bit 41 is converged, and the influence on the efficiency of the hot melting drilling due to too fast heat dissipation is avoided;

meanwhile, the limiting spring 32 is compressed, and an extrusion acting force is formed on the sealing slide block 62 in the limiting groove 61 through the limiting rod 34, so that the water pressure in the bottom of the limiting groove 61, the communication pipe 63 and the semi-ring cavity 64 is increased, and the acting force is the same for all parts in the semi-ring cavity 64 due to the hydraulic pressure transmission characteristic, so that the direction of the extrusion acting force of the clamping block 53 on the piping is changed, the extrusion acting force of the clamping block 53 on the piping is uniformly distributed, the deformation of the piping caused by uneven distribution of the fixed acting force in the hot melting drilling process is effectively avoided, and the quality of the piping after being processed is improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.