CN215111108U

CN215111108U - Half joint assembly

Info

Publication number: CN215111108U
Application number: CN202120684180.5U
Authority: CN
Inventors: 卢明鑫; 卢明伟; 卢志春; 卢明发
Original assignee: Southeast Pipe & Valve Co ltd
Current assignee: Southeast Pipe & Valve Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-12-10
Anticipated expiration: 2031-04-02

Abstract

The utility model provides a half joint component, which comprises two half joint bodies, wherein the two half joint bodies are connected to form a half joint assembly, a perforation is formed between the two half joint bodies, and two ends of the perforation are respectively provided with a tip sealing structure; the end sealing structure comprises a connecting flange, a counter bore and a stud assembly, wherein the connecting flange is provided with a convex ring penetrating into the counter bore, the convex ring is abutted against the sealing ring, the connecting flange comprises at least two connecting ring bodies which are mutually spliced to form a ring, and the connecting ring bodies are adjacent to each other and detachably connected. Through setting up flange for two at least connection ring bodies that splice each other and form the annular, can connect the ring body earlier around establishing on the pipeline and then interconnect it into the annular again, and need not penetrate from the tip of pipeline, it is comparatively convenient to use.

Description

Half joint assembly

Technical Field

The utility model relates to a pipe connection spare, especially a half festival subassembly.

Background

The Chinese patent application with the publication number of CN111396658A discloses an improved leakage-proof universal half joint assembly, which comprises two half joint bodies, a plurality of first connecting bolts and at least one socket joint, wherein the two half joint bodies are provided with a containing cavity, a first sealing element is arranged between the two half joint bodies, the diameter of the minimum cross section of the containing cavity is not less than the diameter of a pipeline, one end of the first sealing element, which is close to the containing cavity, is conical, the first sealing element is provided with an inclined surface the diameter of which is gradually reduced from the end close to the first connecting flange to the direction of the containing cavity, at least one end part of the two half joint bodies is provided with a first connecting flange, the first connecting flange is provided with a first mounting groove communicated with the containing cavity, the first sealing element is arranged in the first mounting groove, the first mounting groove is also provided with a conical inclined surface, the socket joint is sleeved on the outer wall of the pipeline, the socket joint is provided with a positioning boss which can be abutted against the first sealing element, the socket joint is provided with a connecting piece which can be connected with the first connecting flange. However, the socket joint adopted by the half joint component is a joint with an integrated structure, and the connection can be realized only by sleeving the pipeline from the end part of the pipeline, so that the use is inconvenient.

In view of the above, the applicant has made intensive studies to solve the above problems and has made the present invention.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a use comparatively convenient ha fujie subassembly.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a half joint assembly comprises two half joint bodies which are mutually detachably and hermetically connected, wherein the two half joint bodies are mutually connected to form a half joint assembly, a through hole for holding a pipeline is formed between the two half joint bodies, and two ends of the through hole are respectively provided with an end sealing structure for sealing a gap between the pipeline and the through hole;

the end sealing structure comprises a connecting flange, a connecting flange and a stud assembly, wherein the connecting flange is arranged at the end of the half joint assembly and is coaxially arranged with a through hole, the through hole is arranged in the through hole in a penetrating mode, the stud assembly is used for connecting the connecting flange with the half joint assembly fixedly connected with the half joint assembly, the connecting flange is provided with a convex ring penetrating into the through hole, the convex ring abuts against the sealing ring, the connecting flange comprises at least two connecting ring bodies which are mutually spliced to form a ring shape, and the connecting ring bodies are adjacent to each other and can be detachably connected with each other.

As an improvement of the utility model, the one end an organic whole of the connection ring body is connected with first connection piece, and other end an organic whole is connected with the second connection piece, adjacent two in the connection ring body, one of them on the connection ring body first connection piece is hugged closely another on the connection ring body on the second connection piece, the double-screw bolt of double-screw bolt subassembly alternates simultaneously and hugs closely first connection piece with on the second connection piece, perhaps hug closely each other first connection piece with the second connection piece passes through bolt assembly interconnect and is in the same place.

As an improvement of the present invention, the first connecting piece or the second connecting piece is provided with a sinking groove, and the second connecting piece or the first connecting piece is provided with a positioning block matched with the sinking groove.

As an improvement of the utility model, be provided with the ring flange on the lateral wall of half festival assembly, the double-screw bolt of double-screw bolt subassembly alternates simultaneously the ring flange and hug closely each other first connecting piece with on the second connecting piece, threaded connection has first nut and second nut just on the double-screw bolt flange with the ring flange all is located first nut with between the second nut, perhaps the one end of double-screw bolt has the nut, threaded connection has the second nut just on the double-screw bolt flange with the ring flange all is located the nut with between the second nut.

As an improvement of the utility model, two of the mutual connection connect the face of being connected between the ring body and be plane, step face or sawtooth surface.

As an improvement of the present invention, the connecting flange or the flange plate is provided with a rotation stopping groove or a rotation stopping block for limiting the corresponding nut or nut rotation.

As an improvement of the utility model, the threaded connection has the anticreep bolt that is used for supporting on the pipeline on flange's the lateral wall.

As an improvement of the utility model, its characterized in that still including being located flange keeps away from the gland of ha fujie assembly one side, the gland has the hole that is used for supplying the pipeline to pass, the inside wall of hole has diameter or profile diameter from being close to relatively flange's one end is to the inclined guide face that other end direction reduces gradually, just it is in to be provided with simultaneously to support the top in the hole the inclined guide face with last anticreep circle of flange, the gland with flange mutual fixed connection.

As an improvement of the utility model, the double-screw bolt of double-screw bolt subassembly alternates simultaneously on the gland, just screwed connection has to support the top on the double-screw bolt third nut on the gland.

As an improvement of the utility model, the gland includes that two at least splices each other and forms annular gland ring body, adjacent two can dismantle the connection each other between the gland ring body.

As an improvement of the utility model, the anticreep circle is kept away from one side fixed connection or an organic whole of flange are connected with to support the top and are in the gland is kept away from holding ring on the terminal surface of flange one end.

As an improvement of the utility model, the gland is kept away from flange's one end seted up with holding ring complex heavy groove.

As an improvement of the utility model, each half body or one of them be provided with the boss on the lateral wall of half body, be equipped with on the boss with the outage of perforation intercommunication, the alternate plug has the end cap in the outage, the end cap with be provided with flowing back seal structure between the outage.

As an improvement of the utility model, the end cap is including threaded connection portion, pressing part and the instrument connecting portion that connect gradually, threaded connection portion screwed connection be in the outage, pressing part supports and pushes up on the boss.

As an improvement of the utility model, set up on the boss a plurality of with the outage is the even screw hole of cloth in center, just set up on the boss the bottom with the step hole of flowing back trompil intercommunication, the bottom surface in step hole is the step conical surface, just the downthehole seal ring that is provided with of step, seal ring's one end has to support and is in the sealed conical surface of the bottom surface in step hole, the end cap has to support and is in seal ring keeps away from the pressure cover of fenestrate one side and with the clamp plate of pressing cover body coupling, it has a plurality ofly and each to alternate on the depression bar the one-to-one complex screw rod of screw hole.

As an improvement of the present invention, the periphery of the boss has a plurality of lugs, and each of the threaded holes is arranged on each of the lugs in a one-to-one correspondence.

As an improvement of the utility model, set up on the boss a plurality of with the outage is the even screw hole of cloth in center, just the boss is being located outage and each position department between the screw hole is provided with the location bulge loop, it has a plurality ofly and each to alternate on the end cap the screw hole one-to-one complex screw rod, just the end cap with be provided with the gasket between the location bulge loop.

As an improvement of the utility model, the bottom surface of the counter bore or the side wall surface of the counter bore is a conical surface.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

1. through setting up flange for two at least connection ring bodies that splice each other and form the annular, can connect the ring body earlier around establishing on the pipeline and then interconnect it into the annular again, and need not penetrate from the tip of pipeline, it is comparatively convenient to use.

2. Through setting up locating hole and heavy groove, be convenient for fix a position fast between two connecting plates, be favorable to improving the installation effectiveness of ha fujie subassembly on the pipeline.

3. Through setting up the groove of splining or the piece of splining, can avoid during double-screw bolt or nut rotation, other nuts rotate thereupon, are convenient for carry out locking operation.

4. Through setting up anticreep bolt and/or anticreep circle, avoid tip seal structure pine to take off, further improve sealed effect.

5. Through setting up flange, can be earlier with ha fujie assembly and flange fixed connection, with gland and flange fixed connection again, both can guarantee the compression volume of sealing washer, can guarantee again that the anticreep circle tightly embraces on the pipeline, sealed effect and firm in connection nature are relatively better.

6. The utility model discloses utilize a double-screw bolt to realize half a husband's festival assembly, flange and the three spare part of gland and divide twice fastening connection, simple structure and cost are lower relatively.

Drawings

FIG. 1 is a schematic structural diagram of a half-joint assembly according to the first embodiment;

fig. 2 is a sectional structure schematic view of the half joint assembly according to the first embodiment, in which the connecting flange is shown separately to facilitate marking of the position of the counterbore, that is, the connecting flange is not yet pressed against the seal ring;

fig. 3 is an exploded view of the connection flange according to the first embodiment.

Fig. 4 is a schematic structural diagram of the plug according to the first embodiment;

FIG. 5 is a schematic structural diagram of a Hough section assembly according to the second embodiment;

FIG. 6 is a schematic structural view of a gland and a run-off preventing ring of the half joint assembly according to the third embodiment;

FIG. 7 is a schematic structural view of half-sections of a half-section of the half-section assembly according to the fourth embodiment;

fig. 8 is a schematic structural view of half-sections of the half-section assembly according to the fifth embodiment.

The designations in the figures correspond to the following:

10-a pipeline; 20-half a;

21-a connecting flange; 21 a-connecting ring body;

21 b-a first connecting piece; 21 c-a second connecting piece;

21 d-sink tank; 21 e-a locating block;

22-counter bore; 23-a sealing ring;

24-a flange plate; 25-a rotation stopping groove;

26-anti-drop threaded holes; 27-a boss;

28-stepped bore; 29-a lug;

30-a stud assembly; 31-a stud;

32-screw cap; 33-a second nut;

34-a third nut; 35-a first nut;

40-plug; 41-a threaded connection;

42-a pressing part; 43-tool connection;

50-pressing cover; 51-anti-slip ring;

52-a positioning ring; 53-sink tank;

61-a threaded hole; 62-positioning the convex ring.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

The first embodiment.

As shown in fig. 1 to 4, the present embodiment provides a huff section assembly, which is mainly used for maintaining a pipeline 10, and repairing a leakage of the pipeline by holding a leakage position of the pipeline 10, of course, the pipeline 10 does not belong to a part of the huff section assembly provided in the present embodiment, but is a use object thereof. The half-joint assembly comprises two half-joint bodies 20 which are detachably and hermetically connected with each other, and the specific detachable and sealed connection structure is the same as that of the conventional half-joint assembly, such as a sealing strip and the like, which is not the focus of the embodiment and is not described in detail herein. The two half-half-bodies 20 are connected with each other to form a half-combination body, and a through hole for holding the pipeline 10 is formed between the two half-bodies 20, namely the half-combination body is provided with the through hole, and two ends of the through hole are respectively provided with an end sealing structure for sealing a gap between the pipeline 10 and the inner side wall of the through hole.

The two end seal structures have the same structure, and one of them is described here as an example. The end sealing structure comprises a connecting flange 21, a counter bore 22 which is arranged at the end of the half joint assembly and is coaxial with the through hole, a sealing ring 23 which is inserted in the counter bore 22, and a plurality of stud assemblies 30 which are used for fixedly connecting the connecting flange 21 and the half joint assembly, wherein the stud assemblies 30 are wound around the pipeline 10 by taking the axial direction of the pipeline as the center. The counter bore 22 is formed by splicing two half-round grooves which are respectively arranged on the two half-half-sections 20, and the sealing ring 23 is formed by mutually bonding two ends of a linear sealing strip. The connecting flange 21 has a collar penetrating into the counterbore 22 and abutting against the seal ring 23, so that when the connecting flange 21 and the half joint combination are locked by the stud assembly 30, the connecting flange 21 and the half joint combination move toward each other to enable the collar to press the seal ring 23 against the counterbore 22 to achieve sealing. Preferably, the bottom surface of the counterbore 12 or the side wall surface of the counterbore 12 is a tapered surface, and the side surface of the sealing ring 23 facing the bottom surface of the counterbore 12 is also a tapered surface, so that a radial force can be formed by the tapered surface, the firm sealing ring 23 tightly holds the pipeline 10, the sealing effect is improved, and the leakage is not easy to occur after long-term use.

As one of the important points of the present embodiment, the connecting flange 21 includes at least two connecting ring bodies 21a which are spliced with each other to form a ring shape, and two adjacent connecting ring bodies 21a are detachably connected with each other, in the present embodiment, the two connecting ring bodies 21a are taken as an example for illustration, and the specific detachable connection structure between the two connecting ring bodies 21a may be a conventional structure, such as a snap connection, and the like, preferably, in the present embodiment, one end of the connecting ring body 21a is integrally connected with a first connecting piece 21b, and the other end of the connecting ring body 21a is integrally connected with a second connecting piece 21c, the first connecting piece 21b and the second connecting piece 21c are arranged in a staggered manner in the thickness direction of the connecting ring body 21a (also in the axial direction of the pipeline), in two adjacent connecting rings 21a, the first connecting piece 21b on one connecting ring body 21a is closely attached to the second connecting piece 21c on the other connecting ring body 21a, the connecting position of each connecting ring body 21a on the connecting flange 21 is correspondingly provided with a stud assembly 30, taking one of the connecting positions as an example, a stud 31 of the stud assembly 30 is simultaneously inserted into the first connecting sheet 21b and the second connecting sheet 21c which are tightly attached to each other, so that the stud assembly 30 can realize the connection between the connecting flange 21 and the huff joint assembly, can also realize the connection between the connecting ring bodies 21a in the connecting flange 21, and is favorable for reducing the cost and facilitating the assembly. It should be noted that instead of using the stud assembly 30 to lock the two connecting pieces, the first connecting piece 21b and the second connecting piece 21c, which are attached to each other, may be connected to each other by a conventional bolt assembly, but this increases the cost and complexity of assembly.

In order to facilitate the assembly type quick positioning, in the embodiment, the first connecting piece 21b or the second connecting piece 21c is provided with a sinking groove 21d, and the second connecting piece 21c or the first connecting piece 21b is provided with a positioning block 21e matched with the sinking groove 21d, so that the quick positioning is realized. In addition, the connecting surface between the two connecting ring bodies 21a connected with each other is a plane, a step surface or a sawtooth surface, preferably a step surface or a sawtooth surface, so that the sealing ring 23 can be better pressed, and leakage of the sealing ring 23 at the connecting position of the two connecting ring bodies 21a is avoided.

Preferably, the outer side wall of the half-joint assembly is provided with a flange 24, and the flange 24 is formed by splicing two half-ring plates which are respectively and fixedly connected to the half-joint bodies 20. The studs 31 of the stud assembly 30 are simultaneously inserted through the flange 24, thereby achieving the connection between the studs 31 and the half-joint assembly. The stud 31 is screwed with a first nut and a second nut 32, and the connecting flange 21 and the flange 24 are both located between the first nut and the second nut 33, or one end of the stud 31 is provided with the nut 32, the stud 31 is screwed with the second nut 33, and the connecting flange 21 and the flange 24 are both located between the nut 32 and the second nut 33, so as to realize connection, and in this embodiment, the stud 31 is provided with the nut 32. In addition, the connecting flange 21 or the flange 24 is provided with a rotation stopping groove 25 or a rotation stopping block for limiting the rotation of the corresponding nut or nut, and in the embodiment, the connecting flange 21 is provided with a rotation stopping groove 25 matched with the nut 32.

Preferably, the side wall of the connecting flange 21 is spirally connected with an anti-dropping bolt (not shown in the figure) for abutting against the pipeline 10, and certainly, the side wall of the connecting flange 21 needs to be provided with an anti-dropping threaded hole 26 so that the anti-dropping bolt can pass through, the anti-dropping bolts can be multiple, and the specific number can be set according to actual needs.

The outer side wall of each half-half 20 or one half-half 20 is provided with a boss 27, the boss 27 is provided with a liquid discharge hole communicated with the through hole, a plug 40 is inserted in the liquid discharge hole, and a liquid discharge sealing structure is arranged between the plug 40 and the liquid discharge hole, so that the cleaning and maintenance are convenient. The plug 40 and the liquid discharge sealing structure can adopt different structures according to the aperture size of a liquid discharge hole, the plug 40 provided in the embodiment comprises a threaded connection part 41, a pressing part 42 and a tool connection part 43 which are sequentially and integrally connected, the threaded connection part 41 is spirally connected in the liquid discharge hole (namely, the liquid discharge hole is a threaded hole), the pressing part 42 is pressed against the boss 37, a sealing gasket is arranged between the two parts, the tool connection part 43 is mainly used for rotating the plug 40 by means of a tool in the process of construction, the structure of the tool connection part needs to be designed according to different tools, the tool connection part 43 is taken as an outer hexagonal connection part with a cross section in a regular hexagon as an example in the embodiment, and a tool slot can be set as a straight or cross screw matched with a screwdriver or an inner hexagonal slot matched with an inner hexagonal wrench.

When the double-half-bolt type pipe fitting is used, the two half-halves 20 are buckled at the leakage position of the pipe 10 in an opposite mode and hold the pipe 10, then the two half-halves 20 are fixedly connected with each other, and finally the two end sealing structures are locked through the double-bolt assemblies 30.

Example two.

As shown in fig. 5 and referring to fig. 1 to 4, the hough section component provided in this embodiment has the following differences:

the half joint assembly provided by this embodiment further includes a gland 50 located on a side of the connecting flange 21 away from the half joint assembly, the gland 50 has an inner wall of an inner hole for the pipe 10 to pass through, the inner wall of the inner hole has a tapered surface whose diameter (when the cross section of the pipe 10 is circular) or whose profile diameter (when the cross section of the pipe 10 is non-circular) gradually decreases from one end relatively close to the connecting flange 21 to the other end, when it needs to be described, the inner wall of the entire inner hole can be used as the tapered surface, at this time, the inner hole is a tapered hole, or only one section of the inner wall of the inner hole can be used as the tapered surface, at this time, the inner hole is a tapered hole.

The downthehole anticreep circle 51 that supports simultaneously on oblique leading face and flange 21 that is provided with, it is concrete, flange 21 has a bulge loop that can penetrate the hole, and this bulge loop supports and supports at anticreep circle 51, and anticreep circle 51 has a breach, and its inside wall is provided with the anticreep line, and this type anticreep circle 51 is conventional anticreep circle, for example the elastic metal clamping ring that adopts in the chinese utility model patent of the grant bulletin number CN206831008U, and no longer detailed here.

The gland 50 and the connecting flange 21 are fixedly connected with each other, and a specific connecting structure may be a conventional structure, for example, only a bolt assembly connected between the gland 50 and the connecting flange 21, in this embodiment, the stud 31 of the stud assembly 30 is a stud 31 without a nut 32, the stud 31 is simultaneously inserted into the gland 50, and the stud 31 is screwed with a third nut 34 abutting against one end 50 of the gland away from the connecting flange 21 in addition to the first nut 35 and the second nut 33 mentioned in the first embodiment, so that the gland 50 can be locked by the stud 31, which is simple in structure and convenient to operate.

The gland 50 may be an integral gland, and preferably, in this embodiment, the gland 50 includes at least two gland rings spliced with each other to form a ring, two adjacent gland rings are detachably connected with each other, and a specific connection structure between the gland rings is the same as that between the connection rings 21a (see fig. 3) in the first embodiment, and will not be described again here.

The difference between the usage of the half joint assembly provided in this embodiment and the first embodiment is that after the connection flange 21 and the half joint assembly are fixedly connected to each other, the gland 50 and the connection flange 21 need to be locked in an opposite direction by the third nut 34.

Example three.

As shown in fig. 6, the difference between the huff-section assembly provided in this embodiment and the second embodiment is that the retaining ring 51 has a different structure, specifically, in this embodiment, the retaining ring 51 is in a ring shape with a notch, and the inner surface of the retaining ring 51 is provided with the same retaining pattern as that of the first embodiment, and the important point is that a side of the retaining ring 51 away from the connecting flange 21 is fixedly or integrally connected with a positioning ring 52 abutting against an end surface of the end of the pressing cover 50 away from the connecting flange 21, so as to prevent the retaining ring 51 from being removed from the pressing cover 50 during the installation or removal process. Preferably, the end of the gland 50 remote from the attachment flange 21 is provided with a recessed groove 53 which cooperates with the retaining ring 52 so that the retaining ring 52 can be recessed into the recessed groove 53 after assembly.

Example four.

As shown in fig. 7, the difference between the huff section component provided in this embodiment and the first, second or third embodiment is that, the boss 27 is provided with a plurality of threaded holes which are uniformly distributed by taking the liquid discharge hole as the center, the boss 27 is provided with a step hole 28 the bottom of which is communicated with the liquid discharge hole, the bottom surface of the step hole 28 is a step conical surface, a sealing washer is arranged in the step hole 28, one end of the sealing washer is provided with a sealing conical surface which is propped against the bottom surface of the step hole, the plug 40 is provided with a penetrating rod which is inserted in the liquid discharge hole, a pressing sleeve which is integrally connected with the penetrating rod and is propped against one side of the sealing washer far away from the penetrating hole and a pressing plate which is integrally connected with the pressing sleeve, a plurality of screw rods which are in one-to-one fit with all threaded holes are inserted on the pressing rod, so that the plug 40 can be locked on the boss 27 through the screw rods, in the locking process, the pressing sleeve presses the sealing washer tightly on the step conical surface of the step hole to realize sealing. It should be noted that the plug 40 may not be provided with a through rod, and the pressing sleeve is directly used to press the sealing washer.

Preferably, in the present embodiment, the periphery of the boss 27 has a plurality of lugs 29, and each threaded hole is arranged on each lug 29 in a one-to-one correspondence, i.e. the number of lugs 29 is the same as the number of threaded holes.

Example five.

As shown in fig. 8, the difference between the huff section assembly provided in this embodiment and the fourth embodiment is that the boss 27 and the matching structure thereof are different, in this embodiment, a plurality of threaded holes 61 uniformly distributed with the drain hole as the center are formed on the boss 27, a positioning convex ring 62 is disposed at a position between the drain hole and each threaded hole 61 of the boss 27, a plurality of screws corresponding to each threaded hole in a one-to-one manner are inserted into the plug 40, and a sealing sheet is disposed between the plug and the positioning convex ring 62. If necessary, a groove matched with the positioning convex ring 62 can be arranged on the plug.

The present invention has been described in detail with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention according to the prior art, and these all belong to the protection scope of the present invention.

Claims

1. A half joint assembly comprises two half joint bodies which are mutually detachably and hermetically connected, wherein the two half joint bodies are mutually connected to form a half joint assembly, and a through hole for holding a pipeline is formed between the two half joint bodies;

2. The half-joint assembly as claimed in claim 1, wherein one end of the connecting ring body is integrally connected with a first connecting piece, the other end of the connecting ring body is integrally connected with a second connecting piece, in two adjacent connecting ring bodies, the first connecting piece on one connecting ring body is tightly attached to the second connecting piece on the other connecting ring body, and the stud of the stud assembly is simultaneously inserted into the first connecting piece and the second connecting piece which are tightly attached to each other, or the first connecting piece and the second connecting piece which are tightly attached to each other are connected to each other through a bolt assembly.

3. The half joint assembly according to claim 2, wherein a sinking groove is formed on the first connecting piece or the second connecting piece, and a positioning block matched with the sinking groove is arranged on the second connecting piece or the first connecting piece.

4. The half-joint assembly according to claim 2, wherein a flange is provided on an outer side wall of the half-joint assembly, the stud of the stud assembly is inserted into the flange and the first connecting piece and the second connecting piece which are tightly attached to each other, the stud is screwed with a first nut and a second nut, and the connecting flange and the flange are both located between the first nut and the second nut, or one end of the stud is provided with a nut, the stud is screwed with a second nut, and the connecting flange and the flange are both located between the nut and the second nut.

5. The huff-and-puff assembly as recited in claim 2, wherein the connecting surface between two of said connecting rings connected to each other is a plane, a step or a saw-tooth surface.

6. The half joint assembly according to claim 4, wherein the connecting flange or the flange plate is provided with a rotation stopping groove or a rotation stopping block for limiting the rotation of the corresponding nut or nut.

7. The half-joint assembly according to claim 1, wherein the side wall of the connecting flange is spirally connected with an anti-dropping bolt for abutting against the pipeline.

8. The half joint assembly according to any one of claims 1-7, further comprising a gland located on a side of the connecting flange remote from the half joint assembly, the gland having an inner bore for a pipe to pass through, an inner sidewall of the inner bore having a tapered guide surface with a diameter or profile diameter that gradually decreases from one end relatively close to the connecting flange to the other end, and an anti-slip ring disposed in the inner bore and abutting against both the tapered guide surface and the connecting flange, the gland and the connecting flange being fixedly connected to each other.

9. The half-joint assembly according to claim 8, wherein the stud of the stud assembly is inserted into the gland at the same time, and a third nut abutting against the gland is screwed on the stud.

10. The huff and puff assembly as recited in claim 8, wherein said gland comprises at least two gland rings joined to each other to form a ring, wherein adjacent gland rings are detachably connected to each other.

11. The half-joint assembly according to claim 8, wherein a side of the anti-release ring away from the connecting flange is fixedly connected or integrally connected with a positioning ring abutting against an end face of the gland at an end away from the connecting flange.

12. The huff and puff assembly as recited in claim 11, wherein an end of said cover remote from said attachment flange defines a recessed channel for engaging said retaining ring.

13. The half joint assembly according to any one of claims 1 to 7, wherein a boss is arranged on the outer side wall of each half joint body or one half joint body, a liquid discharge hole communicated with the through hole is arranged on the boss, a plug is inserted into the liquid discharge hole, and a liquid discharge sealing structure is arranged between the plug and the liquid discharge hole.

14. The huff-and-puff assembly as recited in claim 13, wherein said plug comprises a threaded connection portion, a pressing portion and a tool connection portion, wherein said threaded connection portion is screwed into said drain hole, and said pressing portion is pressed against said boss.

15. The huff section assembly of claim 13, wherein the boss is provided with a plurality of threaded holes uniformly distributed around the drain hole, the boss is provided with a stepped hole having a bottom communicated with the drain hole, the bottom surface of the stepped hole is a stepped conical surface, a sealing washer is arranged in the stepped hole, one end of the sealing washer is provided with a sealing conical surface abutting against the bottom surface of the stepped hole, the plug is provided with a pressing sleeve abutting against one side of the sealing washer far away from the through hole and a pressing plate integrally connected with the pressing sleeve, and a plurality of screws which are in one-to-one fit with the threaded holes are inserted in the pressing plate.

16. The huff and puff assembly as recited in claim 15, wherein the periphery of the boss has a plurality of lugs and wherein the threaded holes are disposed in a one-to-one correspondence with each of the lugs.

17. The half joint assembly according to claim 13, wherein the boss has a plurality of threaded holes uniformly distributed around the drain hole, and a positioning convex ring is provided on the boss at a position between the drain hole and each threaded hole, a plurality of screws are inserted into the plug to be in one-to-one fit with each threaded hole, and a sealing piece is provided between the plug and the positioning convex ring.

18. The huff-and-puff assembly as recited in claim 1, wherein the bottom surface of the counterbore or the side wall surface of the counterbore is a tapered surface.