CN113579309A

CN113579309A - Drilling device for pressure pipeline

Info

Publication number: CN113579309A
Application number: CN202111044432.9A
Authority: CN
Inventors: 李�昊; 王甄平; 李梦德; 王怀斌; 李伟; 王硕智; 张昊然
Original assignee: Beijing Waterworks Group Yutong Municipal Engineering Co ltd
Current assignee: Beijing Waterworks Group Yutong Municipal Engineering Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2021-11-02

Abstract

The application discloses area pressure pipeline drilling equipment relates to the technical field of pipeline reposition of redundant personnel construction. The water diversion clamp comprises a water diversion clamp seat, a ball valve, a sealing connecting assembly and a drilling mechanism; the ball valve is fixedly connected with the water outlet end of the water distribution clamping seat; the sealing connecting assembly is detachably connected with one end of the ball valve, which is far away from the water distribution clamping seat; the drilling mechanism comprises a working bin, one end of the working bin is detachably connected with the sealing connection assembly, and a rotating assembly and a boosting assembly driving the rotating assembly to move along the axial direction of the working bin are connected in the working bin in a sliding manner; the drilling mechanism also comprises a drill bit which is positioned outside the working bin and in the sealing and connecting assembly, and the drill bit is driven by the rotating assembly to rotate. Realize the drilling reposition of redundant personnel of pipeline under the condition of pipeline not cutting off water in this application, effectively avoided the pipeline reposition of redundant personnel construction to influence the condition of resident normal water, shortened the engineering time moreover greatly, improved the efficiency of construction.

Description

Drilling device for pressure pipeline

Technical Field

The application relates to the technical field of pipeline shunting construction, in particular to a drilling device for an under-pressure pipeline.

Background

With the continuous development of economic construction in China, the urbanization is developed more and more rapidly. In order to guarantee the water consumption of residents, people pay more and more attention to the construction and construction of tap water pipelines.

In the process of tap water pipeline construction, the pipeline is often required to be constructed in a shunting way so as to meet the water consumption problem of more residents. At present, when the water pipeline is used for shunting construction operation, the valve of the water pipeline is required to be closed to suspend water supply, and then the outer side wall of the pipeline is drilled to connect a new shunting pipeline.

In view of the above-mentioned related art, the inventor believes that there is a defect affecting normal water use of residents in the tap water pipeline diversion construction process.

Disclosure of Invention

In order to reduce the condition that influences resident normal water in the water pipeline reposition of redundant personnel work progress, this application provides a pipeline drilling equipment is pressed in area.

The application provides a take pressure pipeline drilling equipment adopts following technical scheme:

a drilling device for a pressurized pipeline comprises a water distribution clamping seat, a ball valve, a sealing connecting assembly and a drilling mechanism;

the ball valve is fixedly connected with the water outlet end of the water distribution clamping seat; the sealing connecting assembly is detachably connected with one end of the ball valve, which is far away from the water distribution clamping seat;

the drilling mechanism comprises a working bin, one end of the working bin is detachably connected with the sealing connection assembly, and a rotating assembly and a boosting assembly are connected in the working bin in a sliding mode and drive the rotating assembly to move along the axial direction of the working bin;

the drilling mechanism is characterized by further comprising a drill bit which is located outside the working bin and in the sealing and connecting assembly, and the drill bit is driven by the rotating assembly to rotate.

Through adopting above-mentioned technical scheme, when shunting construction operation to the pipeline, be fixed in ball valve and water diversion seat on the area pressure pipeline, pass through sealing connection subassembly and ball valve sealing connection with drilling mechanism, rotary component and boosting subassembly are started simultaneously, the drill bit carries out drilling operation to the pipeline along the working bin axis direction downwards gradually under boosting subassembly and rotary component's combined action, drilling in-process is because sealing connection subassembly is with ball valve and drilling mechanism sealing connection, consequently, water in the pipeline can not spout, realize the drilling reposition of redundant personnel of pipeline under the condition that the pipeline does not cut off water, the condition that pipeline reposition of redundant personnel construction influences resident normal water has effectively been avoided, and shorten the engineering time greatly, construction efficiency is improved.

Preferably, the rotating assembly comprises a pneumatic motor connected in the working bin in a sliding manner, and a connecting rod arranged at the output end of the pneumatic motor;

first drilling passageway has been seted up to working bin one end, the internal diameter of drilling passageway equals the external diameter of connecting rod, the connecting rod is worn out the working bin outside along first drilling passageway, the drill bit with the connecting rod can be dismantled and be connected the setting.

By adopting the technical scheme, the drill bit and the pneumatic motor are detachably connected through the connecting rod, so that the rotating assembly and the drill bit can be conveniently assembled and installed by constructors; and the pneumatic motor is located inside the working bin, and the drill bit is located outside the working bin, so that water flowing out along the pore in the pressurized pipeline is effectively prevented from entering the working bin when the pressurized pipeline is drilled.

Preferably, a connecting cover is coaxially arranged at one end of the working bin, which is far away from the sealing and connecting assembly;

the boosting assembly comprises a lead screw nut coaxially arranged with the connecting cover, and the lead screw nut penetrates through the connecting cover;

the boosting mechanism also comprises a rotating lead screw which is in threaded connection with the lead screw nut, and a driving piece which drives the rotating lead screw to rotate;

when the rotating lead screw rotates downwards along the axial direction of the working bin, the rotating assembly is pushed to move downwards along the axial direction of the working bin.

Through adopting above-mentioned technical scheme, drive through the driving piece and rotate the lead screw and rotate, rotate the lead screw and rotate along the working bin axis direction downwardly, drive rotating assembly simultaneously and follow the working bin axis direction and remove downwardly, and then make drill bit and pipeline lateral wall conflict and compress tightly and carry out drilling work to the pipeline lateral wall.

Preferably, a protective connecting assembly is arranged between the rotating lead screw and the rotating assembly;

the protection connecting assembly comprises a bearing which is coaxially and fixedly connected with the rotating lead screw, and a connecting ring plate is coaxially and fixedly connected with the outer ring of the bearing;

when the rotary screw rod rotates downwards along the axial direction of the working bin, the connecting ring plate slides downwards along the axial direction of the working bin.

Through adopting above-mentioned technical scheme, rotate and set up protection coupling assembling between lead screw and the rotating assembly, when rotating the lead screw and rotate downwards along working bin axis direction, the connecting ring board slides downwards along working bin axis direction and promotes the rotating assembly and move downwards along working bin axis direction, has avoided rotating the lead screw direct and rotating assembly contact, effectively prevents to rotate the rotatory in-process damage rotating assembly of lead screw.

Preferably, the protective connecting assembly further comprises a supporting plate fixedly connected with the rotating assembly, and the supporting plate is bolted with the supporting ring plate.

Through adopting above-mentioned technical scheme, the support ring board passes through bolt fixed connection with the backup pad, has improved the stability when rotating the lead screw and promoting rotating assembly along the downward movement of working bin axis direction.

Preferably, the sealing connection assembly comprises an adapter cabin and a sealing cabin;

the switching bin comprises an upper connecting pipe, a water blocking plate and a lower connecting pipe which are coaxially arranged in sequence and integrally formed, the upper connecting pipe is in threaded connection with the working bin, and a second drilling channel for the connecting rod to penetrate through is formed in the water blocking plate;

the sealing bin is a barrel body with an opening at one end, the opening end of the sealing bin is in threaded connection with the ball valve, one end of the sealing bin, which is far away from the ball valve, is in threaded connection with the lower connecting pipe, and a third drilling channel for the connecting rod to penetrate through is formed in the sealing bin;

and rubber rings are extruded between the working bin and the upper connecting pipe and between the sealing bin and the lower connecting pipe.

Through adopting above-mentioned technical scheme, the connecting rod passes first, second and third drilling passageway in proper order and stretches into behind the sealed storehouse and be connected with the drill bit, and the drill bit carries out drilling during operation, presses the water that flows out along the hole in the pipeline and gets into behind the sealed storehouse and be blocked, has effectively avoided the drilling in-process to press the water free spun condition in the pipeline.

Preferably, the connecting rod is detachably connected with the output end of the pneumatic motor.

Through adopting above-mentioned technical scheme, the connecting rod can be dismantled with pneumatic motor and be connected, has both made things convenient for constructor equipment drilling mechanism, is convenient for again according to actual conditions adjustment connecting rod's length, the application scope of effectively improving.

Preferably, a silencer is arranged on the pneumatic motor.

Through adopting above-mentioned technical scheme, set up the muffler on the pneumatic motor, noise when reducing drilling equipment to the pipeline drilling prevents to influence resident's normal life.

Preferably, the driving piece is a driving motor, and the output end of the driving motor is coaxially and fixedly connected with the rotating lead screw.

Through adopting above-mentioned technical scheme, the driving piece is driving motor, drives through control driving motor and rotates lead screw rotation mode and replace traditional artifical rotation mode, has effectively reduced constructor's the amount of labour.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the pipeline is subjected to diversion construction operation, the ball valve and the water diversion seat are fixed on the pipeline under pressure, the drilling mechanism is in sealing connection with the ball valve through the sealing connection assembly, the rotating assembly and the boosting assembly are started simultaneously, the drill bit gradually performs drilling operation on the pipeline downwards along the axis direction of the working bin under the combined action of the boosting assembly and the rotating assembly, water in the pipeline cannot be sprayed out due to the fact that the sealing connection assembly is in sealing connection with the drilling mechanism in the drilling process, the drilling diversion of the pipeline is achieved under the condition that the pipeline does not stop water, the condition that normal water use of residents is influenced by pipeline diversion construction is effectively avoided, construction time is greatly shortened, and construction efficiency is improved;

2. a protective connecting assembly is arranged between the rotating lead screw and the rotating assembly, when the rotating lead screw rotates downwards along the axial direction of the working bin, the connecting ring plate slides downwards along the axial direction of the working bin and pushes the rotating assembly to move downwards along the axial direction of the working bin, so that the rotating lead screw is prevented from directly contacting with the rotating assembly, and the rotating assembly is effectively prevented from being damaged in the rotating process of the rotating lead screw;

3. the connecting rod can be dismantled with pneumatic motor and be connected, has both made things convenient for constructor equipment drilling mechanism, is convenient for again according to actual conditions adjustment connecting rod's length, the application scope of effectively improving.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic view showing an overall structure of the water diversion cassette and the ball valve in the embodiment of the present application.

Fig. 3 is a schematic cross-sectional view of the sealing connection assembly and drilling mechanism in an embodiment of the present application.

Fig. 4 is a partially enlarged schematic view of a portion a in fig. 3.

Fig. 5 is a partially enlarged schematic view of a portion B in fig. 3.

Description of reference numerals: 1. a water diversion clamping seat; 11. fixing the card; 111. connecting the support lug; 112. water distribution holes; 2. a ball valve; 3. sealing the connecting assembly; 31. transferring a bin; 311. an upper connecting pipe; 3111. a first sealing rubber ring; 312. a water-blocking plate; 3121. a second drilled passage; 313. a lower connecting pipe; 3131. a second sealing rubber ring; 32. sealing the bin; 321. a third drilled passage; 33. sealing the rubber ring; 4. a drilling mechanism; 41. a working bin; 411. a first drilled passage; 42. a connecting cover; 43. a rotating assembly; 431. a pneumatic motor; 4311. a muffler; 432. a connecting rod; 44. a boost assembly; 441. a lead screw nut; 442. rotating the lead screw; 443. a drive member; 45. a drill bit; 5. a protective connection assembly; 51. a support bar; 52. a support plate; 53. a bearing; 54. and connecting the ring plates.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses area pressure pipeline drilling equipment.

Examples

Referring to fig. 1, a drilling device for pressure pipelines comprises a water distribution clamping seat 1, a ball valve 2 fixedly connected with the water outlet end of the water distribution clamping seat 1, a sealing connection assembly 3 communicated with one end of the ball valve 2 departing from the water distribution clamping seat 1, and a drilling mechanism 4 connected to one end of the sealing connection assembly 3 departing from one end of the ball valve 2.

When the diversion construction is carried out on the water pipeline, the diversion clamping seat 1 fixed with the ball valve 2 is sleeved and fixed on the pipeline with pressure, and then the drilling mechanism 4 is fixed with the ball valve 2 in a sealing way through a sealing connecting piece; open ball valve 2, control drilling mechanism 4 passes sealing connection subassembly 3 in proper order, ball valve 2 is to being located the pipeline lateral wall that divides water end of the cassette 1 that divides water and drills, drill and close ball valve 2 after accomplishing, and take off sealing connection subassembly 3 and drilling mechanism 4, install the reposition of redundant personnel pipeline to ball valve 2 on, realize the drilling reposition of redundant personnel of pipeline under the condition that the pipeline does not cut off water, effectively avoided the pipeline reposition of redundant personnel construction to influence the condition of resident normal water, and the engineering time has been shortened greatly, and the efficiency of construction is improved.

Referring to fig. 2, the water distribution clamping seat 1 comprises two semi-circular ring-shaped fixing clamps 11, and the two fixing clamps 11 coaxially surround to form a circular ring; two free ends of the fixing clip 11 are integrally formed with a connecting support lug 111, and the connecting support lug 111 is provided with a connecting through hole; the water distribution clamping seat 1 further comprises two connecting bolts, the two connecting bolts penetrate through two connecting through holes in one ends, corresponding to the two fixing clamps 11, respectively, the connecting bolts are connected with limiting nuts in a threaded mode, and the two fixing clamps 11 are fixedly connected through the connecting bolts and the limiting nuts. One of the fixing clips 11 is a water outlet end of the water diversion card holder 1, a water diversion hole 112 is formed in the fixing clip 11, the ball valve 2 is fixedly connected with the fixing clip 11 with the water diversion hole 112, and the ball valve 2 is communicated with the water diversion hole 112.

Referring to fig. 3, the drilling mechanism 4 includes a working bin 41, the working bin 41 is a circular cylinder with an open end, and a first drilling channel 411 is coaxially disposed at the unopened end of the working bin 41; the opening end of the working bin 41 is connected with a connecting cover 42 through threads, and one end of the working bin 41 departing from the connecting cover 42 is provided with external threads. The drilling mechanism 4 further includes a rotating assembly 43 slidably connected in the working chamber 41, a boosting assembly 44 disposed between the connecting cover 42 and the working chamber 41, and a drill bit 45 connected to the rotating assembly 43.

The rotating assembly 43 comprises a pneumatic motor 431, the pneumatic motor 431 is slidably connected in the working bin 41, and the output end of the pneumatic motor 431 is arranged towards the first drilling channel 411; the side wall of the working bin 41 is provided with a through hole for the air supply pipeline of the air motor 431 to penetrate through. The output end of the pneumatic motor 431 is fixedly or detachably connected with a connecting rod 432 coaxially, and in the embodiment of the application, the connecting rod 432 is in threaded connection with the pneumatic motor 431; connecting rod 432 is circular pole, and the external diameter of connecting rod 432 equals the internal diameter of first drilling passageway 411, and connecting rod 432 deviates from the one end of pneumatic motor 431 and passes first drilling passageway 411 after and can dismantle with drill bit 45 and be connected through the drill chuck, and the drill chuck is for prior art this no longer repeated description.

In order to reduce the noise generated during the operation of the pneumatic motor 431, a silencer 4311 is also fixedly connected to the pneumatic motor 431.

The boosting assembly 44 comprises a screw nut 441 coaxially fixed on the connecting cover 42, and the screw nut 441 penetrates through two ends of the connecting cover 42 in the axial direction; boost assembly 44 further includes a rotary lead screw 442 threadedly coupled to lead screw nut 441; a driving member 443 is fixedly connected to an end of the rotary screw 442 away from the screw nut 441, the driving member 443 may be a driving motor or a rotary handle, and in the embodiment of the present invention, the driving member 443 is a rotary handle.

When the side wall of the pipeline is drilled, the drill bit 45 is abutted against the side wall of the pipeline, the pneumatic motor 431 is started, and the pneumatic motor 431 drives the drill bit 45 to rotate; meanwhile, the rotating handle is rotated, the rotating lead screw 442 rotates downwards along the axial direction of the working bin 41, the pneumatic motor 431 is pushed to move downwards along the axial direction of the working bin 41 during the downward rotation of the rotating lead screw 442, and the drill bit 45 is further extruded to drill the side wall of the pipeline.

Referring to fig. 4, in order to avoid damaging the pneumatic motor 431 when the rotary screw 442 rotates downwards along the working chamber 41, a protective connecting assembly 5 is arranged between the rotary screw 442 and the pneumatic motor 431, the protective connecting assembly 5 includes a supporting rod 51 coaxially and fixedly connected with one end of the pneumatic motor 431 facing the rotary screw 442, and a supporting plate 52 is coaxially and fixedly connected to the supporting rod 51; the protective connecting assembly 5 further comprises a bearing 53 coaxially and fixedly connected with one end of the rotating screw 442 facing the pneumatic motor 431, and a connecting ring plate 54 is coaxially and fixedly connected with the outer ring of the bearing 53. The connection ring plate 54 is in close contact with the support plate 52.

In order to improve the stability when the rotary screw 442 pushes the air motor 431 to move, the connection ring plate 54 is detachably connected to the support plate 52 by bolts.

Referring to fig. 5, the sealing connection assembly 3 includes a switching bin 31 and a sealing bin 32, the switching bin 31 includes an upper connection pipe 311, a water blocking plate 312 and a lower connection pipe 313 which are coaxially arranged and integrally formed in sequence, an inner diameter of the upper connection pipe 311 is equal to an outer diameter of the working bin 41, an inner thread which cooperates with an outer thread at one end of the working bin 41 away from the connection cover 42 is arranged on an inner side wall of the upper connection pipe 311, a first sealing rubber ring 3111 is coaxially placed in the upper connection pipe 311, and in the embodiment of the present application, the first sealing rubber ring 3111 is a rubber ring; the outer diameter of the water blocking plate 312 is equal to the inner diameter of the upper connecting pipe 311, a second drilling channel 3121 is coaxially formed on the water blocking plate 312, and the inner diameter of the second drilling channel 3121 is equal to the inner diameter of the first drilling channel 411; the inner diameter of the lower connection tube 313 is smaller than the inner diameter of the upper connection tube 311, an inner thread is disposed on the inner sidewall of the lower connection tube 313, and a second sealing rubber ring 3131 is coaxially disposed in the lower connection tube 313, in this embodiment, the second sealing rubber ring 3131 is also a rubber ring.

The sealed bin 32 is a cylinder with an opening at one end, and the periphery of the opening end of the sealed bin 32 is upwards provided with an external thread which is in threaded connection with the ball valve 2; an external thread which is in threaded connection with the lower connecting pipe 313 is arranged on the periphery of the unopened end of the sealed cabin 32; a third drilling channel 321 is coaxially formed at one end of the sealed cabin 32 connected with the lower connecting pipe 313, and the inner diameter of the third drilling channel 321 is equal to that of the first drilling channel 411.

When the drilling mechanism 4 and the sealing connection assembly 3 are assembled, firstly, the support plate 52 and the connecting ring plate 54 are fixedly connected through bolts, and then the connecting rod 432 is in threaded connection with the output end of the pneumatic motor 431, so that the assembly of the rotating assembly 43 and the boosting assembly 44 is realized; then, the connecting rod 432 and the pneumatic motor 431 are put into the working bin 41 from the opening end of the working bin 41, and the connecting rod 432 penetrates out along the first drilling channel 411; then the connecting cover 42 is screwed down, and the boosting assembly 44 is assembled and fixed with the working bin 41; the connecting rod 432 sequentially passes through the first sealing rubber ring 3111 and the second drilling channel 3121 on the transfer bin 31, so that the upper connecting pipe 311 is in threaded connection with the working bin 41, and at this time, the first sealing rubber ring 3111 is pressed between the working bin 41 and the upper connecting pipe 311; then, the connecting rod 432 sequentially passes through the second sealing rubber ring 3131 and the third drilling channel 321, so that the lower connecting pipe 313 is in threaded connection with the sealing bin 32, and at the moment, the second sealing rubber ring 3131 is pressed between the sealing bin 32 and the water blocking plate 312; finally, the drill bit 45 is connected with the connecting rod 432 through a drill chuck, so that the drilling mechanism 4 and the sealing and connecting assembly 3 are assembled, and the drill bit 45 is positioned in the sealing bin 32.

The implementation principle of the above embodiment is as follows:

when the pipeline under pressure needs to be subjected to diversion construction, the two fixing clamps 11 are respectively sleeved on the two upward sides of the periphery of the pipeline under pressure, the water diversion holes 112 on the fixing clamps 11 with the water diversion holes 112 are aligned to diversion positions, and the two fixing clamps 11 are tightly fixed on the pipeline under pressure by using bolts; after the drilling mechanism 4 and the sealing connection assembly 3 are assembled, the sealing bin 32 is fixedly connected with the ball valve 2.

When the pipeline with pressure is drilled, the working bin 41 is clamped and fixed by a wrench, the pneumatic motor 431 is turned on, and the pneumatic motor 431 drives the drill bit 45 to rotate; and meanwhile, the rotating handle is rotated, so that the rotating screw rod 442 rotates downwards and pushes the pneumatic motor 431 to move downwards along the axial direction of the working bin 41, the drill bit 45 gradually collides with the pipeline with pressure and is tightly pressed until the drilling is finished, the rotating handle is stopped, and the pneumatic motor 431 is turned off.

After drilling is completed, the handle is rotated in the reverse direction, so that the drill bits 45 are all positioned in the sealing bin 32, the ball valve 2 is closed, the sealing connection assembly 3 is separated from the ball valve 2, and finally the shunt pipeline is connected to the ball valve 2, so that shunt construction of the pipeline with pressure is completed. This application realizes the drilling reposition of redundant personnel of pipeline under the condition that the pipeline does not cut off water, has effectively avoided the pipeline reposition of redundant personnel construction to influence the condition of resident normal water, has shortened the engineering time moreover greatly, has improved the efficiency of construction.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a pressure pipeline drilling equipment which characterized in that: comprises a water diversion clamping seat (1), a ball valve (2), a sealing connecting assembly (3) and a drilling mechanism (4);

the ball valve (2) is fixedly connected with the water outlet end of the water distribution clamping seat (1); the sealing connecting assembly (3) is detachably connected with one end of the ball valve (2) deviating from the water distribution clamping seat (1);

the drilling mechanism (4) comprises a working bin (41) with one end detachably connected with the sealing connection assembly (3), and a rotating assembly (43) and a boosting assembly (44) driving the rotating assembly (43) to move along the axial direction of the working bin (41) are connected in the working bin (41) in a sliding manner;

drilling mechanism (4) are still including being located working bin (41) outside and being located drill bit (45) in sealing connection subassembly (3), drill bit (45) rotate under rotating assembly's (43) drive.

2. A pressurized pipe drilling apparatus according to claim 1, wherein: the rotating assembly (43) comprises a pneumatic motor (431) connected in the working bin (41) in a sliding manner, and a connecting rod (432) arranged at the output end of the pneumatic motor (431);

first drilling passageway (411) have been seted up to working bin (41) one end, the internal diameter of drilling passageway equals the external diameter of connecting rod (432), working bin (41) outside is worn out along first drilling passageway (411) in connecting rod (432), drill bit (45) with connecting rod (432) can be dismantled to be connected the setting.

3. A pressurized pipe drilling apparatus according to claim 1, wherein: a connecting cover (42) is coaxially arranged at one end of the working bin (41) departing from the sealing connecting component (3);

the boosting assembly (44) comprises a lead screw nut (441) coaxially arranged with the connecting cover (42), and the lead screw nut (441) penetrates through the connecting cover (42);

the boosting mechanism further comprises a rotating lead screw (442) which is in threaded connection with the lead screw nut (441), and a driving piece (443) which drives the rotating lead screw (442) to rotate;

when the rotating lead screw (442) rotates downwards along the axial direction of the working bin (41), the rotating assembly (43) is pushed to move downwards along the axial direction of the working bin (41).

4. A pressurized pipe drilling apparatus according to claim 3, wherein: a protective connecting assembly (5) is arranged between the rotating lead screw (442) and the rotating assembly (43);

the protection connecting assembly (5) comprises a bearing (53) coaxially and fixedly connected with the rotating lead screw (442), and a connecting ring plate (54) is coaxially and fixedly connected with the outer ring of the bearing (53);

when the rotating screw rod (442) rotates downwards along the axial direction of the working bin (41), the connecting ring plate (54) slides downwards along the axial direction of the working bin (41).

5. A pressurized pipe drilling apparatus according to claim 4, wherein: the protective connecting assembly (5) further comprises a supporting plate (52) fixedly connected with the rotating assembly (43), and the supporting plate (52) is in bolted connection with the supporting ring plate.

6. A pressurized pipe drilling apparatus according to claim 2, wherein: the sealing connection assembly (3) comprises a switching bin (31) and a sealing bin (32);

the switching bin (31) comprises an upper connecting pipe (311), a water-blocking plate (312) and a lower connecting pipe (313) which are coaxially arranged in sequence and integrally formed, the upper connecting pipe (311) is in threaded connection with the working bin (41), and a second drilling channel (3121) for a connecting rod (432) to pass through is formed in the water-blocking plate (312);

the sealing bin (32) is a cylinder body with an opening at one end, the opening end of the sealing bin (32) is in threaded connection with the ball valve (2), one end of the sealing bin (32) departing from the ball valve (2) is in threaded connection with the lower connecting pipe (313), and a third drilling channel (321) for a connecting rod (432) to penetrate through is formed in the sealing bin (32);

rubber rings are extruded between the working bin (41) and the upper connecting pipe (311) and between the sealing bin (32) and the lower connecting pipe (313).

7. A pressurized pipe drilling apparatus according to claim 2, wherein: the connecting rod (432) is detachably connected with the output end of the pneumatic motor (431).

8. A pressurized pipe drilling apparatus according to claim 2, wherein: a silencer (4311) is arranged on the pneumatic motor (431).

9. A pressurized pipe drilling apparatus according to claim 3, wherein: the driving piece (443) is a driving motor, and the output end of the driving motor is coaxially and fixedly connected with the rotating lead screw (442).