Pipeline tail end plug

Abstract

A pipeline tail end plug is characterized in that a barrel opening arc-shaped groove, a barrel wall straight groove and a barrel bottom straight groove which are communicated with one another are formed in the inner wall of a barrel opening, the straight edge side of a barrel wall and the straight edge side of a barrel bottom of a half Hough section body, and a framework seal comprises a barrel opening arc-shaped section, a barrel wall section and a barrel bottom section which are correspondingly connected with the barrel opening arc-shaped groove, the barrel wall straight groove and the barrel bottom straight groove; when the two half Haff joint bodies enclose to form the cylindrical plug, the arc-shaped section of the cylinder opening sealed by the framework forms an annular seal and is restrained on a pipeline A to be plugged, and the cylinder wall sections and the cylinder bottom sections on the two half Haff joint bodies are attached to each other to form sealing fit. By means of the sectional design of the framework seal, the framework seal is embedded into the corresponding groove bodies in the two half Haff joint bodies, when the tail end of a pipeline is plugged and the two half Haff joint bodies are enclosed to form the cylindrical plug, sealing between a cylinder opening area and the pipeline A to be plugged and sealing between the two half Haff joint bodies can be directly achieved, and the sealing effect is good. The sealing piece and the pipeline do not need to be sleeved, the plug assembling efficiency is improved, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model patent relates to a pipeline plugging device, specifically to a pipeline end plug. Background Art

[0002] When a pipeline leaks, rapid repair work on the accident pipeline is very important. It can solve the problem of water leakage on the pipeline or the problem of cutting off the original pipeline flow during pipeline maintenance, so as to achieve safe and stable work. The specific blocking method needs to be selected according to the actual situation. Among them, when the purpose is to cut off the flow of the medium in the pipeline, the pipeline plug is often used to block the end of the pipeline.

[0003] A plug structure for plugging the end of a pipe is disclosed in the document entitled "External-embracing Quick-connect Pipe Plug" (document number CN112664749A, hereinafter referred to as Document 1). Document 1 includes a first connector, a second connector, a seal and a locking assembly; the first connector and the second connector are combined to form an assembly hole, a plugging groove and a sealing wall located on one side of the plugging groove, and the seal is arranged in the plugging groove and abuts against the sealing wall. The plug can be clamped and fixed to the pipe to be plugged, and the sealing wall blocks the outlet of the pipe without being inserted into the inner wall of the pipe. The additional seal can increase the sealing effect of the external-embracing quick-connect pipe plug.

[0004] In document 1, the seal is an annular or cylindrical integrated ring body. When plugging the end of the pipe, it is necessary to control the seal ring to be axially sleeved on the pipe end section, and then cover the half-type connector. Among them, in order to ensure that the seal ring can effectively seal the pipe end, the inner hole edge of the seal ring must meet the condition of being able to fit tightly against the outer wall of the pipe. Therefore, the inner hole size of the seal ring is bound to be smaller than the outer diameter of the pipe. When manually inserting the seal ring, it is difficult to accurately connect the seal ring with the pipe and there is an obstruction of mutual friction between the seal ring and the pipe. The seal ring insertion operation is relatively difficult, which brings great inconvenience to the pipe end plugging operation, thereby affecting the overall assembly efficiency of the plug. Summary of the invention

[0005] The utility model provides a pipe end plug, which can quickly seal the pipe end while ensuring good sealing, thereby improving the plug assembly efficiency.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted is: a pipe end plug, wherein the inner wall of the barrel mouth of the half-joint, the straight side of the barrel wall and the straight side of the barrel bottom are provided with mutually connected barrel mouth arc grooves, barrel wall straight grooves and barrel bottom straight grooves, and the skeleton seal includes a barrel mouth arc section, a barrel wall section and a barrel bottom section which are connected in correspondence with the barrel mouth arc grooves, barrel wall straight grooves and barrel bottom straight grooves. When the two half-joint halves are enclosed to form a cylindrical plug, the barrel mouth arc section of the skeleton seal constitutes an annular seal constrained on the pipe A to be blocked, and the barrel wall sections and barrel bottom sections on the two half-joint halves fit each other to form a sealing fit.

[0007] Compared with the prior art, the technical effect of the utility model is as follows: through the segmented design of the skeleton seal to be engaged with the corresponding groove bodies on the two half-joint halves, when the end of the pipeline is blocked, the two half-joint halves are enclosed to form a cylindrical plug, and the arc section of the barrel mouth of the skeleton seal constitutes an annular seal constrained on the pipeline A to be blocked, and the barrel wall section and the barrel bottom section on the two half-joint halves fit each other to form a sealing fit. When the half-joint halves are enclosed, the sealing between the barrel mouth area and the pipeline A to be blocked and the two half-joint halves can be directly achieved, without the need to perform the sleeve operation of the seal and the pipeline, thereby improving the plug assembly efficiency and making the operation convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the tube mouth when the utility model is assembled with the tube head to be blocked;

[0009] Figure 2 It is a schematic diagram of the bottom of the cylinder when the utility model is assembled with the pipe head to be blocked;

[0010] Figure 3 It is a three-dimensional appearance schematic diagram of the utility model;

[0011] Figure 4 This is a schematic diagram of the separation of the half-body of the Haff node;

[0012] Figure 5 This is a schematic diagram of the half joint without the sealing strip installed;

[0013] Figure 6 It is a schematic diagram of skeleton sealing;

[0014] Figure 7 It is a cross-sectional view of the utility model in an assembled state with a pipe head to be blocked. DETAILED DESCRIPTION

[0015] The following is combined with Figure 1-7 And related content, the utility model is further described in detail:

[0016] A pipe end plug, wherein the inner wall of the barrel mouth of the half-section 11, the straight side of the barrel wall and the straight side of the barrel bottom are provided with mutually connected barrel mouth arc grooves 111, barrel wall straight grooves 112 and barrel bottom straight grooves 113, and the skeleton seal 20 includes a barrel mouth arc section 21, a barrel wall section 22 and a barrel bottom section 23 which are arranged in correspondence with the barrel mouth arc grooves 111, the barrel wall straight grooves 112 and the barrel bottom straight grooves 113. When the two half-section halves 11 are enclosed to form the cylindrical plug 10, the barrel mouth arc section 21 of the skeleton seal 20 constitutes an annular seal constrained on the pipe A to be blocked, and the barrel wall sections 22 and barrel bottom sections 23 on the two half-section halves 11 fit each other to form a sealing fit.

[0017] In the above scheme, when the end of the pipe A to be blocked is blocked, the end pipe section of the blocked pipe A is embedded in the barrel cavity of the half-section half body 11, and then the two half-section half bodies 11 are enclosed to form a cylindrical plug 10, and the barrel mouth arc sections 21 on the two half-section half bodies 11 are enclosed to form an annular sealing constraint on the pipe A to be blocked, and the corresponding barrel wall sections 22 and barrel bottom sections 23 on the two half-section half bodies 11 fit each other to seal the joint between the two half-section half bodies 11, so that the end pipe mouth of the pipe A to be blocked can be effectively blocked in the barrel cavity of the cylindrical plug 10. Here, when the half-section half bodies 11 are enclosed, the sealing cooperation between the barrel mouth area and the pipe A to be blocked and the two half-section half bodies 11 can be directly achieved, which is convenient and quick to operate and improves the efficiency of plug assembly.

[0018] Combination Figure 1 , 2 As shown in Figure 3, the straight side of the cylinder wall of the half-section 11 has a cylinder wall connecting ear 30A protruding radially outward, and the middle part of the straight side of the cylinder bottom has a cylinder bottom connecting ear 30B protruding axially outward. The corresponding cylinder wall connecting ears 30A and cylinder bottom connecting ears 30B on the two half-section halves 11 are penetrated by bolts to form a detachable connection. The bolts are used to lock the two half-section halves 11. The cooperation between the cylinder wall connecting ear 30A and the bolts mainly constrains and locks the axial side of the two half-section halves 11, which can ensure the sealing of the cylinder wall joint; and the cooperation between the cylinder wall connecting ear 30A and the bolts can constrain and lock the straight side of the cylinder bottom of the two half-section halves 11, which can ensure the sealing of the cylinder bottom joint.

[0019] In addition, further combining Figure 4 As shown, in the present embodiment, the inner hole contours of the cylinder wall connecting ear 30A and the cylinder bottom connecting ear 30B are polygonal, and the bolt head contour shape is consistent with and matched therewith. When locking the two half-section halves 11, it is only necessary to twist the nut. The bolt will not rotate due to the limiting cooperation between the bolt head and the inner hole, thereby making the bolt tightening operation more convenient.

[0020] As a preferred solution, the contact surface of the arc segment 21 at the barrel mouth with the outer tube wall of the pipe head A to be blocked is a toothed surface 211, and the tooth peaks or tooth valleys constituting the toothed surface 211 are arranged along the circumferential direction of the outer tube wall of the pipe head A to be blocked. By setting the toothed surface 211, the sealing performance between the arc segment 21 at the barrel mouth and the outer tube wall of the pipe head A to be blocked can be improved, and the friction barrier between the arc segment 21 at the barrel mouth and the outer tube wall of the pipe head A to be blocked can also be improved, and the relative sliding between the arc segment 21 at the barrel mouth and the pipe head A to be blocked can be limited in the axial direction of the half-section 11, thereby improving the anti-drop effect between the cylindrical plug 10 and the pipe head A to be blocked.

[0021] Furthermore, combined with Figure 7 As shown, the area between two adjacent tooth valleys on the tooth-shaped surface 211 forms a tooth unit, and the tooth surface on the tooth unit near the side where the barrel mouth is located is inclined from the tooth root to the side where the barrel bottom is located, and the tooth surface near the side where the barrel bottom is located is perpendicular to the barrel core direction. In this solution, the tooth unit is an inverted tooth structure, which can further enhance the effect of limiting the relative sliding of the barrel mouth arc section 21 and the pipe head A to be blocked in the axial direction.

[0022] Combination Figure 4 , 5 As shown in , 6, the groove bottom of the barrel mouth arc groove 111 is a toothed surface and the tooth peaks or tooth valleys are arranged in the circumferential direction, and the outer peripheral surface of the barrel mouth arc segment 21 is a toothed surface that matches the groove bottom shape of the barrel mouth arc groove 111. Because the side of the barrel mouth arc segment 21 that fits with the pipe head A to be blocked is a curved surface, the relative position stability between it and the pipe head A to be blocked is very important for the sealing performance, so the toothed surface of the barrel mouth arc segment 21 and the toothed surface of the groove bottom of the barrel mouth arc groove 111 are meshed with each other, which plays a role in limiting the relative deviation of the barrel mouth arc segment 21 and the barrel mouth arc groove 111, ensuring the relative position stability between the barrel mouth arc segment 21 and the half-section half 11 and the pipe head A to be blocked.

Claims

1. A pipe end plug, characterized in that: The inner wall of the barrel mouth, the straight side of the barrel wall and the straight side of the barrel bottom of the half-joint (11) are provided with barrel mouth arc grooves (111), barrel wall straight grooves (112) and barrel bottom straight grooves (113) which are connected to each other. The skeleton seal (20) comprises a barrel mouth arc section (21), a barrel wall section (22) and a barrel bottom section (23) which are arranged in a connected manner corresponding to the barrel mouth arc grooves (111), the barrel wall straight grooves (112) and the barrel bottom straight grooves (113). When the two half-joint halves (11) are enclosed to form a cylindrical plug (10), the barrel mouth arc section (21) of the skeleton seal (20) forms an annular seal constrained on the pipe A to be blocked, and the barrel wall sections (22) and barrel bottom sections (23) on the two half-joint halves (11) fit each other to form a sealing fit.

2. The pipe end plug according to claim 1, characterized in that: A cylinder wall connecting ear (30A) protruding radially outward is provided on the straight side of the cylinder wall of the half-joint (11), and a cylinder bottom connecting ear (30B) protruding axially outward is provided in the middle of the straight side of the cylinder bottom. The corresponding cylinder wall connecting ears (30A) and cylinder bottom connecting ears (30B) on the two half-joint (11) are connected by bolts inserted therein to form a detachable connection.

3. The pipe end plug according to claim 1 or 2, characterized in that: The contact surface of the arc-shaped section (21) of the barrel mouth with the outer tube wall of the tube head A to be blocked is a toothed surface (211), and the tooth peaks or tooth valleys constituting the toothed surface (211) are arranged along the circumference of the outer tube wall of the tube head A to be blocked.

4. The pipe end plug according to claim 3 is characterized in that: The area between two adjacent tooth valleys on the tooth profile surface (211) forms a tooth unit, wherein the tooth surface on the tooth unit near the cylinder mouth of the half-section (11) is inclined from the tooth root to the cylinder bottom side, and the tooth surface near the cylinder bottom side is perpendicular to the cylinder core direction.

5. The pipe end plug according to claim 1 or 2, characterized in that: The bottom of the barrel mouth arc-shaped groove (111) is a toothed surface, and the tooth peaks or tooth valleys are arranged along the circumferential direction. The outer peripheral surface of the barrel mouth arc-shaped section (21) is a toothed surface that matches the shape of the bottom of the barrel mouth arc-shaped groove (111).

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