CN116181982B

CN116181982B - Discharging pipe connecting device for high-temperature and high-release environment

Info

Publication number: CN116181982B
Application number: CN202310233829.5A
Authority: CN
Inventors: 段宏; 周文; 欧阳立华; 王双剑; 沈琛林; 赵战国; 赵庆彬; 张朋; 张亚斌; 郭和一; 谢轶男; 鞠艳旭
Original assignee: Beijing Raymond Saibo Nuclear Equipment Technology Research Co ltd; China Nuclear Power Engineering Co Ltd
Current assignee: Beijing Raymond Saibo Nuclear Equipment Technology Research Co ltd; China Nuclear Power Engineering Co Ltd
Priority date: 2023-03-03
Filing date: 2023-03-03
Publication date: 2024-03-29
Anticipated expiration: 2043-03-03
Also published as: CN116181982A

Abstract

The application discloses discharging pipe connecting device for high temperature and high release environment, including lock sleeve, locating component and continuous pipe subassembly. The locking sleeve comprises two or more inclined holes, the inclined holes are uniformly distributed in the circumferential direction of the locking sleeve, the locking sleeve is locked outside the discharging pipe through the positioning assembly penetrating through the inclined holes, and the pipe feeding assembly and the locking sleeve are detachably connected. The discharging pipe connecting device for the high-temperature high-release environment compresses the continuous pipe to the end face of the discharging pipe, achieves reliable contact of the sealing face, reliably locks and positions the locking sleeve on the discharging pipe, and avoids axial and/or radial movement dislocation when the discharging pipe is connected with the continuous pipe, so that the risk of leakage of feed liquid is avoided, the discharging function of the discharging pipe is recovered, and normal discharge of feed liquid is guaranteed.

Description

Discharging pipe connecting device for high-temperature and high-release environment

Technical Field

The application relates to the technical field of nuclear engineering, in particular to a discharging pipe connecting device for a high-temperature and high-pressure environment.

Background

With the continuous development of society, the demand for electric power energy is increasing. In order to adapt to economic development and meet the increase of energy demands, thereby realizing balance of economy, society and ecological environment, the proportion of nuclear energy in energy supply is gradually improved in China. Nuclear engineering, like other industries, also produces waste during the production runs of nuclear power plants. Although the amount of waste generated by the nuclear power plant is small, some of the waste generated by the nuclear power plant has radioactivity, and the radioactive waste must be properly managed and safely disposed of to protect the public and the environment. The high-level waste liquid melting furnace of the spent fuel post-treatment plant is an important device for disposing high-level waste liquid and is an important ring in the nuclear chemical industry. In addition, since the discharge pipe of the high level waste liquid melting furnace is located in the hot chamber and has a high radiation dose, the high level waste liquid flows out from the inside of the discharge pipe after the discharge pipe is broken, and high radiation risk is brought. Therefore, the quick repair is needed after the discharge pipe of the high-level waste liquid melting furnace is accidentally damaged, and the normal discharge function of the discharge pipe is ensured by connecting the connecting pipe to the discharge residual pipe.

The sealing structure commonly used at present is realized through bolt fixing. Patent CN104455464a discloses a pressure-resistant shell sealing structure of a reactor control rod driving mechanism of a nuclear power station. The bottom of the CRDM pressure housing is outwardly convex to form an annular support wall. Further, a circle of screw holes are uniformly formed at the outer edge of the upper surface of the convex ring of the top cover tube seat of the pressure vessel. Further, the lower ends of the stud bolts in the bolt-nut connecting assembly penetrate through the through holes of the pressing plate and then are locked in the convex ring screw holes of the top cover tube seat of the pressure vessel, so that sealing connection is realized. Patent CN2077074U discloses a connection flange for flammable and explosive places. Wherein, sealing flange and welding flange pass through fastening bolt and sealed packing and assemble an organic whole. The sealing flange plate and the connecting pipe can be axially fastened through bolts. However, the above-mentioned prior art cannot be suitable for the tube-feeding operation of the discharge tube of the waste liquid melting furnace in the high-level environment, and cannot realize efficient and accurate tube-feeding in the application environment.

Disclosure of Invention

The object of the present application is to solve the above-mentioned technical problems.

To achieve the above objective, a first aspect of the present application provides a discharging pipe connecting device for a high-temperature and high-discharge environment, which is used for a pipe-feeding operation of a discharging pipe, and includes a locking sleeve, a positioning assembly and a pipe-feeding assembly. The locking sleeve comprises two or more inclined holes, the inclined holes are uniformly distributed in the circumferential direction of the locking sleeve, the locking sleeve is locked outside the discharging pipe through the positioning assembly penetrating through the inclined holes, and the pipe feeding assembly and the locking sleeve are detachably connected.

Further, the number of the inclined holes is n, and n is more than or equal to 6 and less than or equal to 10.

Further, the included angle between the axis of the inclined hole and the axis of the locking sleeve is alpha, and alpha is smaller than 90 degrees.

Further, the included angle between the axis of the inclined hole and the axis of the locking sleeve is alpha, and alpha is more than or equal to 11 degrees and less than or equal to 17 degrees.

Further, the total degree of the addition of the inclined hole axis and the locking sleeve axis clamp angle is beta, beta=alpha×n, and beta is more than or equal to 100 degrees and less than or equal to 120 degrees.

Further, the discharging pipe connecting device further comprises a fixing piece, the locking sleeve comprises two or more than two straight holes, and the fixing piece penetrates through the straight holes to connect the pipe feeding assembly with the locking sleeve.

Further, the straight holes and the inclined holes are distributed in the locking sleeve in a staggered manner.

Further, the continuous pipe assembly comprises a continuous pipe and a flange, the flange is detachably connected to the periphery of the continuous pipe, and the fixing piece penetrates through the straight hole and the flange to connect the continuous pipe with the locking sleeve.

Further, the upper end of the continuous pipe sequentially comprises a locking sleeve matching section and a threaded section from top to bottom, the outer diameter of the locking sleeve matching section is smaller than that of the threaded section, and the flange is detachably connected to the threaded section.

Further, the lower end part of the locking sleeve comprises a continuous pipe matching section, the inner diameter of the continuous pipe matching section is smaller than the inner diameter of other parts of the locking sleeve, and the continuous pipe matching section and the locking sleeve matching section are in clearance fit so as to realize axial alignment of a continuous pipe and a discharge pipe.

Further, at the lower end face of the locking sleeve, the distances from the straight holes and the inclined holes to the axis of the locking sleeve are the same, and the distances between the adjacent straight holes and the adjacent inclined holes are the same.

Further, the distance from the straight hole to the axis of the locking sleeve is the same, the distance from the inclined hole to the axis of the locking sleeve is the same, and the radius of a circle formed by connecting the centers of the straight holes is smaller than that of a circle formed by connecting the centers of the inclined holes.

Further, the positioning assembly comprises a positioning ball body and a jackscrew, the positioning ball body is arranged in the inclined hole, the positioning ball body is in contact with the upper end face of the jackscrew so as to be extruded to the outer wall surface of the discharging pipe by the jackscrew, and at least one part of the jackscrew is arranged in the inclined hole.

Further, in a state that the discharging pipe connecting device is connected to the discharging pipe, the projection of the lower end head of the jackscrew in the axial direction is positioned below the projection of the flange in the axial direction.

Further, the flange is provided with a clearance groove which is an opening radially outwards, the clearance groove corresponds to the position of the jackscrew, and at least one part of the jackscrew is positioned in the clearance groove.

Further, the upper end face of the continuous pipe is contacted with the lower end face of the discharge pipe, and the continuous pipe is axially aligned with the discharge pipe.

Further, the upper end face of the continuous pipe is provided with a sealing ring groove, a sealing ring is arranged in the sealing ring groove, and the sealing ring realizes the sealing connection between the discharging pipe and the continuous pipe.

By applying the technical scheme of the invention, at least the following technical effects are realized:

1. this discharging pipe connecting device compresses tightly the location spheroid again by the jackscrew and locks the location on the discharging pipe reliably through setting up the inclined hole, has avoided the discharging pipe to be connected with continuous pipe at axial removal dislocation, and then has avoided producing the clearance at the contact surface of discharging pipe and continuous pipe to avoided the risk of feed liquid leakage.

2. This discharging pipe connecting device compresses tightly the continuous pipe to the discharging pipe terminal surface on through the mounting, has realized the reliable contact of sealed face, has avoided discharging pipe and continuous pipe to misplace in radial output, has recovered the ejection of compact function of discharging pipe, has guaranteed the normal emission of feed liquid.

3. The discharging pipe and the continuous pipe in the discharging pipe connecting device adopt the wedge-shaped self-locking principle, so that the connecting reliability is high, the safety of the connection of the discharging pipe and the continuous pipe can be ensured, and the normal discharging function of the discharging pipe is ensured.

4. The discharging pipe connecting device is simple and compact in structure, convenient to install and detach rapidly, and capable of adapting to the scene that the discharging pipe needs urgent repair when the discharging pipe is damaged, so that the discharging function of the discharging pipe can be recovered in time, and leakage of feed liquid is avoided.

5. This discharging pipe connecting device through set up seal structure between discharging pipe and continuous pipe, can guarantee to realize effectively sealed in the junction, avoids the potential safety hazard that the high level waste liquid leakage brought.

Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows a schematic structural view of a tapping pipe connection device for a high temperature and high level environment;

FIG. 2 shows a schematic structural view of an end face of a locking sleeve;

fig. 3 shows a schematic longitudinal section of the locking sleeve.

Reference numerals: 1. a discharge pipe; 2. a locking sleeve; 21. inclined holes; 22. a straight hole; 23. a tube-feeding matching section; 3. a positioning assembly; 31. positioning a sphere; 32. a jackscrew; 4. a tube feeding assembly; 41. performing tube feeding; 411. a locking sleeve matching section; 412. a threaded section; 42. a flange; 43. a clearance groove; 44. a seal ring groove; 45. a seal ring; 5. and a fixing piece.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

The invention is described in further detail below in connection with specific examples which are not to be construed as limiting the scope of the invention as claimed.

According to one aspect of the invention, a tapping pipe connection device for a high temperature and high pressure environment is proposed for use in a pipe-handling operation for breaking a tapping pipe 1.

In this embodiment, as shown in fig. 1, the locking sleeve 2, the positioning assembly 3 and the pipe feeding assembly 4 are included. Wherein the tube assembly 4 comprises a tube 41 and a flange 42. In addition, as shown in fig. 2, the locking sleeve 2 comprises two or more inclined holes 21, and the inclined holes 21 are uniformly distributed on the circumference of the locking sleeve 2, so that the positioning assembly 3 can penetrate through the inclined holes 21 to lock the locking sleeve 2 outside the discharging pipe 1, thereby realizing the locking positioning of the discharging pipe 1, ensuring that the discharging pipe 1 and the continuous pipe 41 are not misplaced in the axial direction when high-level waste liquid in the discharging pipe is conveyed, avoiding gaps on the contact surfaces of the discharging pipe 1 and the continuous pipe 41, and further ensuring the safety and reliability of the discharging process.

Preferably, as shown in FIG. 2, the number of inclined holes 21 in the present embodiment is n, wherein 6.ltoreq.n.ltoreq.10. Because the quantity of the inclined holes 21 influences the radial locking and positioning effect, the quantity of the inclined holes 21 is larger, the locking effect is better, but the cross section area of the locking sleeve 2 is limited in comprehensive consideration, and meanwhile, the quantity of the inclined holes 21 is too large, so that the whole structure of the locking sleeve 2 and the positioning assembly 3 is too complex, the quick installation of the subsequent positioning assembly 3 is not facilitated, the quantity of the inclined holes 21 is set to 6-8, so that the stable locking and positioning effect can be ensured in the radial direction, the whole structure is balanced and concise, and the quick installation is facilitated.

Preferably, as shown in fig. 3, the axis of the inclined hole 21 and the axis of the locking sleeve 2 form an angle α in this embodiment, where α < 90 °. The degree of the included angle alpha influences the radial locking and positioning effect, the degree of the included angle alpha is closer to 90 degrees, the locking effect is better, but the space of the discharging pipe 1 is narrow, and the integral structure of the locking sleeve 2 and the positioning assembly 3 cannot be installed due to the fact that the degree of the included angle alpha is too large, so that the degree of the included angle alpha is controlled to be 11 degrees or less than or equal to 17 degrees, preferably 12 degrees or less than or equal to 16 degrees, the stable locking and positioning effect can be ensured in the radial direction, the integral structure is compact and simple, and the quick installation is facilitated.

Preferably, in this embodiment, the total number of degrees that the inclined hole 21 axis and the locking sleeve 2 axis form an angle is β, β=α×n, wherein β is 100 ° and β is 120 °. Specifically, since the inclined holes 21 are uniformly distributed in the circumferential direction of the locking sleeve 2, the locking sleeve 2 can be locked and positioned around the discharging pipe 1 by arranging n inclined holes 21. The smaller the number of n, the greater the degree of alpha is required, thus ensuring the overall locking effect around. The degree of beta is controlled to be more than or equal to 100 degrees and less than or equal to 120 degrees, so that the balance between n and alpha can be realized, and the whole periphery can be ensured to achieve a better locking and positioning effect.

Further, in the present embodiment, as shown in fig. 1, the positioning assembly 3 includes the positioning balls 31 and the jackscrews 32, and the jackscrews 32 are matched with the number of the positioning balls 31. Wherein, the positioning sphere 31 is arranged in the inclined hole 21, and the positioning sphere 31 is the same as the inclined hole 21 in number and matched with the inclined hole 21 in size. At the same time, at least a portion of the jack screw 32 is disposed inside the inclined hole 21. The positioning ball 31 is in contact with the upper end face of the jackscrew 32, and the jackscrew 32 extrudes the positioning ball 31 to the outer wall surface of the discharging pipe 1, so that the locking sleeve 2 is tightly attached to the discharging pipe 1, and dislocation movement of the locking sleeve is avoided.

Further, in the present embodiment, as shown in fig. 1, the tube continuing assembly 4 and the locking sleeve 2 are detachably connected. The tapping pipe connection device furthermore comprises a fastening element 5. As shown in fig. 2, the locking sleeve 2 includes two or more straight holes 22. From this, as shown in fig. 1, mounting 5 passes straight hole 22 and connects continuous pipe assembly 4 and lock sleeve 2, and mounting 5 and straight hole 22 quantity the same, size assorted to make the firm connection of play material pipe 1 and continuous pipe 41 in the radial direction, realized sealed face's reliable contact, and then make play material pipe 1 resume the ejection of compact function, guaranteed the security and the reliability that the high level of discharging waste liquid discharged in the discharging pipe 1.

Preferably, in this embodiment, as shown in fig. 2, the straight holes 22 and the inclined holes 21 are distributed in the locking sleeve 2 in a staggered manner, so that the radial stable connection and the axial locking and positioning can be integrated, the omnibearing stable locking of the discharging pipe 1 and the continuous pipe 41 is realized, the normal operation of the discharging pipe 1 is ensured, the leakage of high-level waste liquid is avoided, and the personal safety of staff is ensured.

In another embodiment, an equal amount of straight holes 22 can be arranged between two adjacent inclined holes 21, so that the omnibearing stable locking of the discharging pipe 1 and the continuous pipe assembly 4 can be realized, and the normal operation of the discharging pipe 1 is ensured. For example, two straight holes 22 may be provided between adjacent two inclined holes 21.

Preferably, in the present embodiment, at the lower end surface of the locking sleeve 2, the straight hole 22 and the inclined hole 21 are the same in distance from the axis of the locking sleeve 2, and the distances between the adjacent straight holes 22 and inclined holes 21 are the same. Therefore, the acting force of radial locking and positioning and the acting force of axial fixed connection can be staggered and balanced, so that a closed locking and fixing system is formed around the locking sleeve 2, and the stability and reliability of connection of the discharging pipe 1 and the continuous pipe 41 are ensured.

In another embodiment, on the lower end surface of the locking sleeve 2, the straight holes 22 may be disposed at the same distance from the axis of the locking sleeve 2, and the inclined holes 21 may be disposed at the same distance from the axis of the locking sleeve 2. Meanwhile, the distances between the adjacent straight holes 22 may be set to be the same, and the distances between the adjacent inclined holes 21 may be set to be the same. In addition, the radius of the circle formed by connecting the centers of the straight holes 22 is smaller than the radius of the circle formed by connecting the centers of the inclined holes 21. Therefore, as the straight holes 22 and the inclined holes 21 are positioned on different circumferences, the locking sleeve 2 can accommodate more straight holes 22 and inclined holes 21 under the condition of fixed inner diameter, and more positioning assemblies 3 and fixing pieces 5 can be used, so that the stability and reliability of connection of the discharging pipe 1 and the continuous pipe 41 are further enhanced.

Preferably, in the present embodiment, as shown in fig. 1, in the state in which the tapping pipe connection device is connected to the tapping pipe 1, the projection of the lower end of the top wire 32 in the axial direction is located below the projection of the flange 42 in the axial direction. Because the space where the discharging pipe 1 is located is limited and narrow, by setting the length of the jackscrew 32 to meet the above conditions, the operation device can avoid touching the junction of the discharging pipe 1 and the continuous pipe 41 as much as possible, and the jackscrew 32 can be flexibly and conveniently mounted and dismounted.

Preferably, in this embodiment, as shown in FIG. 1, the flange 42 has a clearance groove 43 thereon. The relief groove 43 is open radially outwardly and the relief groove 43 corresponds to the position of the jackscrew 32 with at least a portion of the jackscrew 32 being located within the relief groove 43. The arrangement of the clearance groove 43 can avoid interference between the jackscrew 32 and the flange 42 when the jackscrew 32 is installed, reduce the requirement on alignment precision and improve the efficiency of tube-feeding operation. In other embodiments, the flange 42 may be provided with corresponding inclined holes 21 for the jackscrews 32 to pass through, so that the accuracy of tube feeding can be further ensured, but the requirement on alignment accuracy is increased.

Further, as shown in fig. 1, a flange 42 is detachably attached to the outer periphery of the continuous tube 41. Simultaneously, the fixing piece 5 passes through the straight hole 22 and the flange 42 to connect the continuous pipe 41 with the locking sleeve 2, thereby realizing the fixed connection between the discharge pipe 1 and the continuous pipe 41 and ensuring the normal operation of the discharge pipe 1.

It should be noted that, in this embodiment, the screw is used as the fixing member 5 to connect the continuous pipe 41 to the tapping pipe 1, and in other embodiments, other manners such as a snap connection, a threaded sleeve connection, etc. may be used, and some technical effects of the present invention may be achieved.

Preferably, in this embodiment, as shown in fig. 1, the upper end of the coiled tubing 41 includes a locking sleeve mating section 411 and a threaded section 412 in sequence from top to bottom. Wherein the flange 42 is detachably connected to the threaded section 412, whereby a fixed connection of the flange 42 to the continuous tube 41 is achieved. At the same time, the outer diameter of the locking sleeve mating section 411 is smaller than the threaded section 412. In addition, the lower end part of the locking sleeve 2 further comprises a continuous pipe matching section 23, and the inner diameter of the continuous pipe matching section 23 is smaller than the inner diameter of other parts of the locking sleeve 2. In addition, the alignment of the continuous pipe 41 with the discharge pipe 1 can be achieved by the clearance fit of the continuous pipe fitting section 23 and the locking sleeve fitting section 411.

Further, in the present embodiment, as shown in fig. 1, the upper end surface of the pipe 41 contacts the lower end surface of the tapping pipe 1, and the pipe 41 is axially aligned with the tapping pipe 1. The upper end surface of the continuous pipe 41 has a seal groove 44, and a seal 45 is provided in the seal groove 44. Therefore, the sealing connection between the discharging pipe 1 and the continuous pipe 41 can be realized through the sealing ring 45, so that the overall tightness is ensured, and the leakage of high-level waste liquid is avoided.

Further, in a preferred embodiment, the flange 42, the tube 41, the locking sleeve 2, the fixing member 5 (such as a screw), the jackscrew 32, etc. may be made of nickel-based superalloy, the positioning ball 31 may be made of special ceramic, and the sealing ring 45 may be made of ceramic fiber or industrial pure aluminum. Therefore, each part has good high temperature resistance and irradiation resistance, and can adapt to high temperature and high-radiation environments.

In a specific embodiment, the working principle of the discharging pipe connecting device for the high-temperature and high-pressure environment is as follows:

first, the flange 42 is coupled with the continuous pipe 41; secondly, the positioning ball 31 and the jackscrew 32 are arranged on the locking sleeve 2, the locking sleeve 2 and the discharging pipe 1 are axially assembled in a centering mode, and the positioning ball 31 and the surface of the discharging pipe 1 can be contacted and pressed by screwing the jackscrew 32 to push the positioning ball 31 as far as possible, so that the locking sleeve 2 is locked and positioned on the discharging pipe 1; finally, the flange 42 moves upwards by uniformly tightening the fixing pieces 5 one by one, and simultaneously drives the continuous pipe 41 to move upwards, so that the continuous pipe 41 is uniformly pressed on the end surface of the discharging pipe 1, reliable contact of sealing surfaces is realized, and connection of the continuous pipe 41 and the discharging pipe 1 is completed.

5. This discharging pipe connecting device through set up seal structure between discharging pipe and continuous pipe, can guarantee to realize effectively sealed in the junction, avoids the potential safety hazard that the feed liquid leakage brought.

The above embodiments are merely illustrative embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to apply to the present invention, and all equivalents and modifications according to the technical scheme and the inventive concept thereof are intended to be included in the scope of the present invention.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

It should be noted that in the description of the present specification, descriptions of terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Claims

1. A discharge pipe connecting device for high-temperature and high-level environment, which is used for the pipe feeding operation of a discharge pipe (1), and comprises a locking sleeve (2), a positioning component (3) and a pipe feeding component (4), and is characterized in that the locking sleeve (2) comprises two or more inclined holes (21), the inclined holes (21) are uniformly distributed on the circumference of the locking sleeve (2), the positioning component (3) penetrates through the inclined holes (21) to lock the locking sleeve (2) on the outside of the discharge pipe (1), the pipe feeding component (4) and the locking sleeve (2) are detachably connected, the included angle between the axis of the inclined holes (21) and the axis of the locking sleeve (2) is alpha, 11 degrees are less than or equal to 17 degrees, the total number of degrees of the included angles between the axis of the inclined holes (21) and the axis of the locking sleeve (2) is beta, beta = alpha n,100 degrees beta is less than or equal to 120 degrees, the total number of the inclined holes, the pipe feeding component (4) penetrates through the inclined holes (21) to lock the locking sleeve (2), the ball body (41) and the flange (42) to be detachably connected with the ball body (31) and the ball body (31) to the outer wall (31) are arranged on the outer wall (32) of the top wire (32), at least a part of the jackscrew (32) is arranged in the inclined hole (21), a clearance groove (43) is formed in the flange (42), the clearance groove (43) is an opening which is radially outwards, the clearance groove (43) corresponds to the position of the jackscrew (32), and at least a part of the jackscrew (32) is positioned in the clearance groove (43).

2. The tapping pipe connection according to claim 1, characterized in that the number of inclined holes (21) is n, 6.ltoreq.n.ltoreq.10.

3. The tapping pipe connection according to any one of claims 1-2, further comprising a securing member (5), the locking sleeve (2) comprising two or more straight holes (22), the securing member (5) passing through the straight holes (22) to connect the tapping assembly (4) with the locking sleeve (2).

4. A tapping pipe connection according to claim 3, characterized in that the straight holes (22) and the inclined holes (21) are distributed in the locking sleeve (2) in a staggered manner.

5. The tapping pipe connection according to claim 4, characterized in that the securing element (5) connects the extension pipe (41) to the locking sleeve (2) through the straight bore (22) and the flange (42).

6. The tapping pipe connecting device according to claim 5, wherein the upper end portion of the tapping pipe (41) comprises a locking sleeve mating section (411) and a threaded section (412) from top to bottom, the outer diameter of the locking sleeve mating section (411) is smaller than that of the threaded section (412), and the flange (42) is detachably connected to the threaded section (412).

7. The tapping pipe connection according to claim 6, characterized in that the lower end of the locking sleeve (2) comprises a pipe-continuation mating section (23), the inner diameter of the pipe-continuation mating section (23) being smaller than the inner diameter of the other parts of the locking sleeve (2), the pipe-continuation mating section (23) being in clearance fit with the locking sleeve mating section (411) for achieving axial alignment of the pipe-continuation (41) with the tapping pipe (1).

8. The tapping pipe connecting device according to claim 7, characterized in that the straight holes (22) and the inclined holes (21) are at the same distance from the axis of the locking sleeve (2) at the lower end face of the locking sleeve (2), and the distances between adjacent straight holes (22) and inclined holes (21) are the same.

9. The tapping pipe connecting device according to claim 7, characterized in that the distance from the straight hole (22) to the axis of the locking sleeve (2) is the same at the lower end surface of the locking sleeve (2), the distance from the inclined hole (21) to the axis of the locking sleeve (2) is the same, and the radius of a circle formed by connecting the centers of the straight hole (22) is smaller than the radius of a circle formed by connecting the centers of the inclined hole (21).

10. Tapping pipe connection according to claim 8 or 9, characterized in that the projection of the lower end of the jackscrew (32) in the axial direction is located below the projection of the flange (42) in the axial direction in the state in which the tapping pipe connection is connected to the tapping pipe (1).

11. Tapping pipe connection according to claim 10, characterized in that the upper end surface of the tapping pipe (41) is in contact with the lower end surface of the tapping pipe (1), the tapping pipe (41) being axially centered with the tapping pipe (1).

12. The tapping pipe connecting device according to claim 11, characterized in that the upper end surface of the continuous pipe (41) is provided with a sealing ring groove (44), a sealing ring (45) is arranged in the sealing ring groove (44), and the sealing ring (45) realizes the sealing connection of the tapping pipe (1) and the continuous pipe (41).