A non-locking hole plugging tee for pipelines

Abstract

The present invention discloses a non-keyhole plugging tee for pipelines, which relates to the technical field of plugging tees, and includes a tee shell and a lower guard plate, wherein an annular groove is provided on the inner wall of the tee shell, and a plug is installed in the tee shell at the position of the annular groove; the top of the plug is slidably equipped with a locking assembly, wherein the locking assembly includes a clamping ring and a driving device, and the clamping ring is composed of a plurality of first clamping parts and a plurality of second clamping parts. The present invention adopts a separable clamping ring as a clamping structure, and in the process of sending the plug into the tee shell, the first clamping part moves to the first storage position, and the second clamping part moves to the second storage position, and the clamping ring can be "disassembled" to allow the clamping ring to move into the radial cross section of the plug, and in the process of fixing the plug, the first clamping part and the second clamping part both move to the terminal position, so that a complete clamping ring can be formed at the outer edge of the plug, thereby improving the fixing strength of the plug.

Description

Technical Field

[0001] The invention relates to the technical field of plugging tees, in particular to a non-locking hole type plugging tee for a pipeline. Background Art

[0002] The pipeline non-stop pressure plugging technology is a special technology for the maintenance and emergency repair of in-service pipelines. The plugging tee is a special equipment that is welded in advance at the construction site to install the opening and plugging related construction equipment before the pipeline opening and plugging operation.

[0003] The existing plugging tee includes a locking ring hole structure, which is a hole opened from the inside to the outside on the flange edge to achieve radial movement of the internal locking ring structure to prevent the plug from moving axially along the tee flange; the disadvantage of this structure is that it increases the internal and external connecting hole structure of the tee, increases the leakage points, and poses a leakage hazard. Summary of the invention

[0004] The object of the present invention is to provide a non-locking hole type plugging tee for a pipeline to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] The present invention provides a non-keyhole plugging tee for a pipeline, comprising a tee shell and a lower guard plate, wherein an annular groove is provided on the inner wall of the tee shell, and a plug is installed in the tee shell at the position of the annular groove; a locking assembly is slidably mounted on the top of the plug, and the locking assembly comprises a clamping ring and a driving device, the clamping ring is composed of a plurality of first clamping parts and a plurality of second clamping parts, the plurality of first clamping parts and the plurality of second clamping parts are spaced apart in the circumferential direction, and the first clamping parts and the second clamping parts are both slidably matched with the top of the plug and can only slide in the radial direction of the plug, the outer arc length of the first clamping part is less than the inner arc length, and the outer arc length of the second clamping part is greater than the inner arc length;

[0007] The driving device further comprises a first driving part and a second driving part, wherein the first driving part is used to drive the first engaging member to slide between the terminal position and the first storage position, and the second driving part is used to drive the second engaging member to slide between the terminal position and the second storage position;

[0008] When the first engaging member is in the first receiving position and the second engaging member is in the second receiving position, the first engaging member and the second engaging member are completely in the radial cross section of the blockage, and the side edges of the first engaging member and the second engaging member partially overlap and abut against each other; when the first engaging member and the second engaging member are both in the terminal position, the side edges of a plurality of first engaging members and a plurality of second engaging members completely overlap and abut against each other to form the clamping ring, and at this time, the outer arc surface of the clamping ring abuts against the inner arc surface of the annular clamping groove;

[0009] A first sealing gasket is arranged in the annular groove and is tightly attached to the inner wall thereof, a second sealing gasket is arranged between the plug and the clamping ring, and a third sealing gasket is arranged at the adjacent position of the first engaging member and the second engaging member.

[0010] Furthermore, an annular rotating groove is opened at the top of the plug, and a first thread is arranged on the inner side of the annular rotating groove. The driving device includes a rotating disk adapted in the annular rotating groove, and a second thread adapted to the first thread is arranged on the inner side of the rotating disk.

[0011] Furthermore, a first inclined groove is formed through the rotating disk at a position corresponding to the first engaging piece, and a second inclined groove is formed through the rotating disk at a position corresponding to the second engaging piece, and the inclination of the first inclined groove is greater than the inclination of the second inclined groove; the first driving part includes a first guide column adapted in the first inclined groove, and the top end of the first guide column is fixedly connected to the corresponding first engaging piece through a connecting piece, and the second driving part includes a second guide column adapted in the second inclined groove, and the top end of the first guide column is fixedly connected to the corresponding second engaging piece through a connecting piece.

[0012] Furthermore, an annular embedding groove is provided on the outer peripheral surface of the plug, and a sealing ring is embedded in the annular embedding groove.

[0013] Furthermore, the annular embedding groove includes an embedding portion and a sliding portion, the cross-section of the embedding portion has a width that increases continuously from the outside to the inside to form a cone, the cross-section of the sliding portion is rectangular, and the cross-section of the sealing ring includes a vertical section and inclined sections symmetrically connected at both ends of the vertical section, and a pair of inclined sections respectively abut against the upper and lower sides of the embedding portion.

[0014] Further, a resistance ring is arranged in the sliding part of the annular embedded groove, and the resistance ring is composed of a plurality of first resistance members and a plurality of second resistance members, the first resistance member is arranged correspondingly to the first engaging member, and the second resistance member is arranged correspondingly to the second engaging member, and the cross-sections of the first resistance member and the second resistance member both include a conical section inserted between a pair of inclined sections and a sliding section slidably adapted in the sliding part;

[0015] The blockage is provided with a first sliding groove and a second sliding groove along its radial direction, a first sliding connecting column is slidably arranged in the first sliding groove, and two ends of the first sliding connecting column are respectively fixedly connected to the first resistance member and the first engaging member, a second sliding connecting column is slidably arranged in the second sliding groove, and two ends of the second sliding connecting column are respectively fixedly connected to the second resistance member and the second engaging member.

[0016] Further, the sliding section includes a first sliding part fixedly connected to the conical section and a second sliding part slidably connected to the first sliding part, a first inclined surface is formed on a side of the first sliding part away from the conical section, and the first inclined surface is arranged upward, a second inclined surface is formed on a side of the second sliding part close to the first sliding part and adapted to the first inclined surface, the first inclined surface is tightly fitted with the second inclined surface, and the first inclined surface and the second inclined surface are slidably connected via a keyway structure, and the thickness of the second sealing gasket is greater than the thickness of the first sealing gasket.

[0017] Furthermore, the width of the cross section of the sliding portion is smaller than the width of one end of the small opening of the embedding portion.

[0018] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0019] The present invention adopts a separable clamping ring as a clamping structure. In the process of sending the plug into the three-way shell, the first clamping part moves to the first storage position, and the second clamping part moves to the second storage position. The clamping ring can be "disassembled" to allow the clamping ring to move into the radial cross-section of the plug. In the process of fixing the plug, the first clamping part and the second clamping part are both moved to the terminal position to form a complete clamping ring at the outer edge of the plug, thereby improving the fixing strength of the plug. In addition, the structure does not need to open a locking ring hole on the flange edge, which greatly reduces the leakage risk of the three-way sealing equipment, thereby reducing the operation and maintenance costs of related pipelines.

[0020] In addition, the clamping ring of the present invention can not only complete the fixing work of the plugging, but also cooperate with the first sealing gasket, the second sealing gasket and the third sealing gasket, so that the clamping ring can form a sealing structure at this position, thereby enhancing the sealing effect of the blocking tee. Specifically, the third sealing gasket can form a seal between the adjacent first engaging part and the second engaging part, the second sealing gasket can form a seal between the clamping ring and the plugging, and the first sealing gasket can form a seal between the clamping ring and the annular groove.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-sectional plan structure of the present invention;

[0025] Figure 3 yes Figure 2 Schematic diagram of the local structure at A;

[0026] Figure 4 It is a schematic diagram of the blockage cross-sectional structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the blocking and rotating disk splitting structure of the present invention;

[0028] Figure 6 It is a schematic cross-sectional structure diagram of the three-way housing and the plug of the present invention;

[0029] Figure 7 yes Figure 6 Schematic diagram of the local structure at B;

[0030] Figure 8 It is a schematic structural diagram of the first state of the clamp ring of the present invention;

[0031] Fig. 9 It is a schematic diagram of the structure of the clamping ring and the abutment ring of the present invention in the first state;

[0032] Fig.10 yes Fig. 9 Another perspective structural diagram of;

[0033] Fig.11 It is a schematic diagram of the structure of the clamp ring and the abutment ring in the second state of the present invention;

[0034] Fig.12 yes Fig.11 Another perspective structural diagram of;

[0035] Fig.13 It is a schematic diagram of the structure of the first and second abutment members of the present invention;

[0036] Fig.14 It is a schematic diagram of the disassembly structure of the clamp ring of the present invention.

[0037] In the figure:

[0038] 1- three-way housing; 11- annular groove; 2- lower guard plate; 3- plug; 31- annular rotating groove; 32- annular embedded groove; 321- embedded part; 322- sliding part; 33- sealing ring; 331- vertical section; 332- inclined section; 34- contact ring; 341- first contact member; 342- second contact member; 343- cone section; 344- sliding section; 3441- first sliding part; 3442- second sliding part; 3443- first inclined surface; 3444- second Two inclined surfaces; 35-first sliding groove; 36-second sliding groove; 37-first sliding connecting column; 38-second sliding connecting column; 4-locking assembly; 41-retaining ring; 411-first engaging member; 412-second engaging member; 44-driving device; 441-rotating disk; 442-first inclined groove; 4421-first guide column; 443-second inclined groove; 4431-second guide column; 51-first sealing gasket; 52-second sealing gasket; 61-first thread; 62-second thread. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0040] See also Figure 1-Figure 14 The present invention provides a non-keyhole plugging tee for a pipeline, comprising a tee shell 1 and a lower guard plate 2, wherein an annular groove 11 is provided on the inner wall of the tee shell 1, and a plug 3 is installed in the tee shell 1 at the position of the annular groove 11; when in use, the tee shell 1 and the lower guard plate 2 are welded together to the pipeline to be constructed, surrounding the pipeline to be constructed in an annular direction, and then the plug is installed in the tee shell 1, and finally the flange cover (not shown) is used to tighten the metal winding gasket and the tee shell 1 through studs and nuts to complete the sealing.

[0041] like Figure 1 and Figure 8As shown, the top of the plug 3 is slidably equipped with a locking assembly 4, and the locking assembly 4 includes a snap ring 41 and a driving device 44. The snap ring 41 is composed of a plurality of first snap members 411 and a plurality of second snap members 412. The plurality of first snap members 411 and the plurality of second snap members 412 are spaced apart along the circumferential direction, and the first snap members 411 and the second snap members 412 are both slidably matched with the top of the plug 3 and can only slide along the radial direction of the plug 3. The length of the outer arc edge of the first snap member 411 is less than the length of the inner arc edge thereof, and the length of the outer arc edge of the second snap member 412 is greater than the length of the inner arc edge thereof.

[0042] like Fig. 9 and Fig.11 As shown, the driving device 44 further includes a first driving part and a second driving part, the first driving part is used to drive the first engaging member 411 to slide between the terminal position and the first storage position, and the second driving part is used to drive the second engaging member 412 to slide between the terminal position and the second storage position;

[0043] When the first engaging member 411 is in the first receiving position and the second engaging member 412 is in the second receiving position, the first engaging member 411 and the second engaging member 412 are completely in the radial cross section of the plug 3, and the side edges of the first engaging member 411 and the second engaging member 412 overlap and conflict with each other. Fig.11 and Fig.14 When the first engaging member 411 and the second engaging member 412 are both in the terminal position, the sides of the plurality of first engaging members 411 and the plurality of second engaging members 412 completely overlap and abut against each other to form the snap ring 41, and at this time the outer arc surface of the snap ring 41 abuts against the inner arc surface of the annular groove 11, that is, Figure 8 and Fig. 9 Status shown.

[0044] During installation, the first engaging member 411 and the second engaging member 412 of the clamping ring 41 are respectively in the first receiving position and the second receiving position. It can be understood that the clamping ring 41 does not extend out of the plug 3, so that the plug 3 can slide into the three-way housing 1. Fig.14 In the state shown, when the plug 3 slides to the installation position, that is, the snap ring 41 corresponds to the annular groove 11, the first driving part and the second driving part respectively drive the first engaging member 411 and the second engaging member 412 to move along the radial direction of the plug 3. At this time, the first engaging member 411 and the second engaging member 412 gradually extend out of the plug 3 and are inserted into the annular groove 11. When the first engaging member 411 and the second engaging member 412 are both moved to the terminal position, at this time, the sides of the plurality of first engaging members 411 and the plurality of second engaging members 412 completely overlap and abut to form the snap ring 41 (refer to Fig. 9 and Figure 7As shown in the figure, a portion of the snap ring 41 is located in the annular groove 11, and the other portion is located at the top of the plug 3, thereby completing the fixation of the plug 3.

[0045] The present invention adopts a separable snap ring 41 as a snap-fit ​​structure. In the process of inserting the plug 3 into the three-way housing 1, the first snap member 411 moves to the first receiving position, and the second snap member 412 moves to the second receiving position. The snap ring 41 can be "disassembled" to allow the snap ring 41 to move into the radial cross section of the plug 3 (i.e., the snap ring 411 is formed by Figure 8 The status shown changes to Fig.14 state), and in the process of fixing the plug 3, the first engaging member 411 and the second engaging member 412 are both moved to the terminal position (reference Figure 8 As shown), a completed snap ring 41 can be formed at the outer edge of the plug 3, thereby improving the fixing strength of the plug 3.

[0046] Furthermore, if Figure 7 As shown, a first sealing gasket 51 is provided in the annular groove 11 and is tightly attached to its inner wall, a second sealing gasket 52 is provided between the plug 3 and the retaining ring 41, and a third sealing gasket (not shown) is provided at the adjacent position of the first engaging member 411 and the second engaging member 412.

[0047] The clamping ring 41 of the present invention can not only complete the fixing work of the plug 3, but also cooperate with the first sealing gasket 51, the second sealing gasket 52 and the third sealing gasket, so that the clamping ring 41 can form a sealing structure at this position, thereby enhancing the sealing effect of the blocking tee. Specifically, the third sealing gasket can form a seal between the adjacent first engaging member 411 and the second engaging member 412, the second sealing gasket 52 can form a seal between the clamping ring 41 and the plug 3, and the first sealing gasket 51 can form a seal between the clamping ring 41 and the annular groove 11.

[0048] It should be noted that the first engaging member 411 and the second engaging member 412 have the desired sealing effect. When the first driving unit and the second driving unit drive the first engaging member 411 and the second engaging member 412 to move, the squeezing force between the two can just improve the sealing performance between the first engaging member 411 and the second engaging member 412.

[0049] The sealing performance between the clamp ring 41 and the plug 3 and the sealing performance between the clamp ring 41 and the annular clamping groove 11 can be improved by the internal pressure of the pipeline causing the plug 3 to be pushed upward to form an extrusion.

[0050] like Figure 4 and Figure 5As shown, in a specific embodiment of the present invention, an annular rotating groove 31 is opened at the top of the plug 3, and the inner side surface of the annular rotating groove 31 is provided with a first thread 61. The driving device 44 includes a rotating disk 441 adapted in the annular rotating groove 31, and the inner side surface of the rotating disk 441 is provided with a second thread 62 adapted to the first thread.

[0051] like Figure 8 As shown, a first inclined slot 442 is formed through the rotating disk 441 at a position corresponding to the first engaging member 411, and a second inclined slot 443 is formed through the rotating disk 441 at a position corresponding to the second engaging member 412, and the inclination of the first inclined slot 442 is greater than the inclination of the second inclined slot 443;

[0052] The first driving part includes a first guide column 4421 adapted in the first inclined groove 442, and the top end of the first guide column 4421 is fixedly connected to the corresponding first engaging member 411 through a connecting member, and the second driving part includes a second guide column 4431 adapted in the second inclined groove 443, and the top end of the first guide column 4421 is fixedly connected to the corresponding second engaging member 412 through a connecting member.

[0053] Based on the above design, when in use, the positions of the first inclined slot 442 and the second inclined slot 443 on the rotating disk 441 can be changed by rotating the rotating disk 441. Since the first guide column 4421 and the second guide column 4431 are fixedly connected to the first engaging member 411 and the second engaging member 412 respectively through the connecting member, the first guide column 4421 and the second guide column 4431 can push or pull the first engaging member 411 and the second engaging member 412 to move along the radial direction of the plug 3 through the connecting member during the movement of the first inclined slot 442 and the second inclined slot 443 to complete the extension or retraction action. It should be noted that since the rotating disk 441 and the annular rotating groove 31 are threadedly matched, when the rotating disk 441 completes a certain angle of rotation, the rotating disk 441 can automatically complete the locking at this position.

[0054] like Figure 4 and Figure 5 As shown, in a specific embodiment of the present invention, an annular embedding groove 32 is provided on the outer circumferential surface of the plug 3, and a sealing ring 33 is embedded in the annular embedding groove 32. The sealing ring 33 can achieve sealing by contacting the inner wall of the blocking tee after the plug 3 is installed.

[0055] like Figure 4 As shown, in a specific embodiment of the present invention, the annular embedding groove 32 includes an embedding portion 321 and a sliding portion 322, Figure 7 As shown, the cross section of the embedded portion 321 is tapered in width from outside to inside, and the cross section of the sliding portion 322 is rectangular. Figure 7 and Figure 3 As shown, the cross section of the sealing ring 33 includes a vertical section 331 and inclined sections 332 symmetrically connected to both ends of the vertical section 331 , and the pair of inclined sections 332 respectively abut against the upper and lower sides of the embedded portion 321 .

[0056] like Figure 3 As shown, a resisting ring 34 is disposed in the sliding portion 322 of the annular embedding groove 32. Figure 9-12 As shown, the abutment ring 34 is composed of a plurality of first abutment members 341 and a plurality of second abutment members 342. The first abutment members 341 are arranged correspondingly to the first engaging members 411, and the second abutment members 342 are arranged correspondingly to the second engaging members 412.

[0057] like Fig.13 As shown, the cross sections of the first resisting member 341 and the second resisting member 342 both include a tapered section 343 inserted between a pair of inclined sections 332 and a sliding section 344 slidably fitted in the sliding portion 322;

[0058] like Figure 8 and Fig.12 As shown, the blockage 3 is provided with a first sliding groove 35 and a second sliding groove 36 along its radial direction, a first sliding connecting column 37 is slidably arranged in the first sliding groove 35, and two ends of the first sliding connecting column 37 are respectively fixedly connected to the first resistance member 341 and the first engaging member 411, a second sliding connecting column 38 is slidably arranged in the second sliding groove 36, and two ends of the second sliding connecting column 38 are respectively fixedly connected to the second resistance member 342 and the second engaging member 412.

[0059] Based on the above design, in the process of inserting the plug 3 into the three-way housing 1, the abutment ring 34 and the clamping ring 41 have the same form and are both in a "disassembled" state (refer to Fig.12 As shown), at this time, the sealing ring 33 is in a normal state. When the plug 3 slides in the three-way housing 1, the friction between the sealing ring 33 and the inner wall of the three-way housing 1 is small, which is convenient for adjusting the position of the plug 3. When the clamping ring 41 is inserted into the annular groove 11, a plurality of second abutting members 342 and a plurality of first abutting members 341 are combined to form a abutting ring 34. The conical section 343 of the abutting ring 34 can be inserted between the first inclined sections 332 and squeeze the pair of first inclined sections 332 and vertical sections 331 (refer to Figure 3 , Figure 4 and Fig.10 As shown), the sealing effect of the sealing ring 33 is enhanced.

[0060] like Figure 3 and Fig.13As shown, further, the sliding section 344 includes a first sliding part 3441 fixedly connected to the conical section 343 and a second sliding part 3442 slidably connected to the first sliding part 3441, the first sliding part 3441 is formed with a first inclined surface 3443 on the side away from the conical section 343, and the first inclined surface 3443 is arranged upward, the second sliding part 3442 is formed with a second inclined surface 3444 adapted to the first inclined surface 3443 on the side close to the first sliding part 3441, the first inclined surface 3443 is tightly fitted with the second inclined surface 3444, and the first inclined surface 3443 and the second inclined surface 3444 are slidably connected via a keyway structure, and the thickness of the second sealing gasket 52 is greater than the thickness of the first sealing gasket 51.

[0061] During the installation process, after the clamping ring 41 completes the fixation of the plug 3, the second sliding part 3442 is at the uppermost end of the first sliding part 3441. During use, the pressure in the pipeline can push the plug 3 to move upward, so that the upper part of the first sealing gasket 51 and the second sealing gasket 52 are squeezed. Since the thickness of the second sealing gasket 52 is greater than the thickness of the first sealing gasket 51, under the pressure in the pipeline, the deformation of the second sealing gasket 52 is greater than the deformation of the first sealing gasket 51, that is, the upward movement distance of the plug 3 is greater than the upward movement distance of the clamping ring 41. Relative displacement will occur between the plug 3 and the retaining ring 41. At this time, since the second sliding part 3442 is fixedly connected to the retaining ring 41, the first sliding part 3441 will slide upward relative to the second sliding part 3442 under the drive of the plug 3. Based on the matching relationship between the first inclined surface 3443 of the first sliding part 3441 and the second inclined surface 3444 of the second sliding part 3442, the first sliding part 3441 will move toward the outside and further squeeze the sealing ring 33, thereby further enhancing the sealing performance of the sealing ring 33.

[0062] In a specific embodiment of the present invention, the width of the cross section of the sliding portion 322 is smaller than the width of the small opening of the embedding portion 321, so as to facilitate the installation of the abutment ring 34, that is, the abutment ring 34 can be moved from the embedding portion 321 into the sliding portion 322 during installation.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A non-locking hole plugging tee for a pipeline, comprising a tee shell and a lower guard plate, wherein an annular groove is provided on the inner wall of the tee shell, and a plug is installed in the tee shell at the position of the annular groove; characterized in that: The top of the plug is slidably equipped with a locking assembly, which includes a snap ring and a driving device. The snap ring is composed of a plurality of first snap members and a plurality of second snap members, which are spaced apart along the circumferential direction, and the first snap members and the second snap members are both slidably matched with the top of the plug and can only slide along the radial direction of the plug. The length of the outer arc edge of the first snap member is less than the length of the inner arc edge, and the length of the outer arc edge of the second snap member is greater than the length of the inner arc edge; The driving device further comprises a first driving part and a second driving part, wherein the first driving part is used to drive the first engaging member to slide between the terminal position and the first storage position, and the second driving part is used to drive the second engaging member to slide between the terminal position and the second storage position; When the first engaging member is in the first receiving position and the second engaging member is in the second receiving position, the first engaging member and the second engaging member are completely in the radial cross section of the blockage, and the side edges of the first engaging member and the second engaging member partially overlap and abut against each other; when the first engaging member and the second engaging member are both in the terminal position, the side edges of a plurality of first engaging members and a plurality of second engaging members completely overlap and abut against each other to form the clamping ring, and at this time, the outer arc surface of the clamping ring abuts against the inner arc surface of the annular clamping groove; A first sealing gasket is arranged in the annular groove and is in close contact with the inner wall thereof, a second sealing gasket is arranged between the plug and the clamp ring, and a third sealing gasket is arranged at the adjacent position of the first engaging member and the second engaging member; An annular embedding groove is provided on the outer peripheral surface of the plug, and a sealing ring is embedded in the annular embedding groove; The annular embedding groove includes an embedding portion and a sliding portion, the cross section of the sealing ring includes a vertical section and inclined sections symmetrically connected to both ends of the vertical section, and the pair of inclined sections respectively abut against the upper and lower sides of the embedding portion; A resistance ring is arranged in the sliding part of the annular embedded groove, and the resistance ring is composed of a plurality of first resistance members and a plurality of second resistance members, the first resistance member is arranged correspondingly to the first engaging member, and the second resistance member is arranged correspondingly to the second engaging member, and the cross sections of the first resistance member and the second resistance member both include a conical section inserted between a pair of inclined sections and a sliding section slidably adapted in the sliding part; The plug is provided with a first sliding groove and a second sliding groove along its radial direction, a first sliding connection column is slidably provided in the first sliding groove, and two ends of the first sliding connection column are respectively fixedly connected to the first resistance member and the first engaging member, a second sliding connection column is slidably provided in the second sliding groove, and two ends of the second sliding connection column are respectively fixedly connected to the second resistance member and the second engaging member; The sliding section includes a first sliding part fixedly connected to the conical section and a second sliding part slidably connected to the first sliding part. A first inclined surface is formed on a side of the first sliding part away from the conical section, and the first inclined surface is arranged upward. A second inclined surface adapted to the first inclined surface is formed on a side of the second sliding part close to the first sliding part. The first inclined surface is tightly fitted with the second inclined surface, and the first inclined surface and the second inclined surface are slidably connected via a keyway structure. The thickness of the second sealing gasket is greater than that of the first sealing gasket, and the second sliding part is fixedly connected to the retaining ring.

2. The non-locking hole type sealing tee for pipeline according to claim 1 is characterized in that: The top of the plug is provided with an annular rotating groove, the inner side of the annular rotating groove is provided with a first thread, and the driving device includes a rotating disk adapted in the annular rotating groove, the inner side of the rotating disk is provided with a second thread adapted to the first thread.

3. The non-locking hole type sealing tee for pipeline according to claim 2 is characterized in that: A first inclined groove is formed through the rotating disk at a position corresponding to the first engaging member, and a second inclined groove is formed through the rotating disk at a position corresponding to the second engaging member, and the inclination of the first inclined groove is greater than that of the second inclined groove; the first driving part includes a first guide column adapted in the first inclined groove, and the top end of the first guide column is fixedly connected to the corresponding first engaging member through a connecting member, and the second driving part includes a second guide column adapted in the second inclined groove, and the top end of the second guide column is fixedly connected to the corresponding second engaging member through a connecting member.

4. The non-keyhole plugging tee for pipeline according to claim 1, characterized in that: The width of the cross section of the embedding portion increases from the outside to the inside to form a cone, and the cross section of the sliding portion is rectangular.

5. The non-locking hole type sealing tee for pipeline according to claim 1, characterized in that: The width of the cross section of the sliding portion is smaller than the width of one end of the small opening of the embedding portion.

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