Plugging head for pipeline sealing

Abstract

The utility model relates to the technical field of pipeline sealing, in particular to a plugging head for pipeline sealing, which comprises a plugging cover plate and a shaft barrel mounted on one side of the plugging cover plate and extending into a pipeline, two fixed arc-shaped baffles distributed in a central symmetry manner are fixedly mounted in the shaft barrel, a first annular air bag is fixedly sleeved on the outer barrel wall of the shaft barrel, and a second annular air bag is fixedly sleeved on the outer barrel wall of the shaft barrel. The first annular air bag is fixedly arranged on the outer barrel wall of the shaft barrel in a sleeving mode and abuts against a pipeline port in an extruding mode, the second annular air bag is fixedly arranged on the outer barrel wall of the shaft barrel in a sleeving mode and abuts against the inner wall of the pipeline in an extruding mode, and the first annular air bag communicates with the second annular air bag through an inner cavity of the shaft barrel. The outer diameter of the plugging head can be changed, pipelines with different hole diameter specifications can be rapidly plugged, the plugging head has the advantage of being convenient to use, when 360-degree plugging is formed by the rotary arc-shaped baffle and the fixed arc-shaped baffle in the inner cavity of the shaft barrel, plugging of the inner cavity of the shaft barrel is completed, a hand wheel for controlling the rotary arc-shaped baffle is arranged outside the pipeline, and the plugging head is convenient to use. Furthermore, the device is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline sealing, in particular to a plugging head used for pipeline sealing. Background Art

[0002] During municipal construction, a large number of water pipes need to be laid, and plugs are needed to temporarily seal the pipe ports during installation.

[0003] Traditional plugging heads are mostly made of rubber and are directly inserted into the inner wall of the pipe port. The sliding friction resistance between the outer ring wall of the plugging head and the inner wall of the pipe port is used to achieve the installation and fixation of the plugging head and the plugging of the pipe port.

[0004] Although the above-mentioned plugging heads are simple to use and easy to assemble and disassemble, they are still inconvenient to use. This is because the apertures of pipes laid in municipal construction are not the same. Traditional rubber plugging heads can only be adapted to municipal pipes of the same model, that is, the outer diameter of the plugging head is larger than the inner diameter of the pipe, making it difficult to complete the installation and insertion. The outer diameter of the plugging head is smaller than the inner diameter of the pipe, making it impossible to completely seal. Therefore, in order to effectively seal municipal pipes of various specifications, it is necessary to prepare a variety of different types of plugging heads, which leads to inconvenience in use. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a plugging head for pipeline sealing, which can effectively solve the problems raised in the background technology.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The utility model provides a sealing head for pipeline sealing, comprising a sealing cover plate and a shaft cylinder installed on one side of the sealing cover plate and extending into the pipeline, two fixed arc baffles symmetrically distributed in the center are fixedly installed in the shaft cylinder, a first annular airbag is fixedly sleeved on the outer cylinder wall of the shaft cylinder and squeezed and resisted with the pipeline port, a second annular airbag is fixedly sleeved on the outer cylinder wall of the shaft cylinder and squeezed and resisted with the inner wall of the pipeline, the first annular airbag is connected with the second annular airbag through the inner cavity of the shaft cylinder, and the valve assembly includes a rotating arc baffle arranged in the shaft cylinder, which is used to control the air circulation in the inner cavity of the shaft cylinder and forms a 360° circular seal with the two fixed arc baffles.

[0008] Furthermore, the outer wall of the shaft cylinder penetrates through the inner cavity and is provided with a plurality of first air inlet and air outlet holes and second air inlet and air outlet holes distributed in a circular array.

[0009] Furthermore, a limiting ring is fixedly mounted on one end of the shaft tube away from the blocking cover plate, a circular stopper is fixedly mounted on one end of the shaft tube away from the blocking cover plate, the second annular airbag is arranged between the limiting ring and the circular stopper, and an annular handle is fixedly mounted on one side of the blocking cover plate away from the shaft tube.

[0010] Furthermore, the inner ring wall of the first annular airbag is provided with a plurality of third inlet and outlet holes penetrating the inner cavity, and the first annular airbag is connected with the inner cavity of the shaft cylinder through the plurality of third inlet and outlet holes and the plurality of first inlet and outlet holes.

[0011] Furthermore, the inner ring wall of the second annular airbag is provided with a plurality of fourth inlet and outlet holes penetrating the inner cavity, and the second annular airbag is connected with the inner cavity of the shaft cylinder through the plurality of fourth inlet and outlet holes and the plurality of second inlet and outlet holes.

[0012] Furthermore, the valve assembly also includes a valve stem rotatably mounted in the inner cavity of the shaft cylinder and having two rotating arc baffles fixedly mounted on the outer shaft wall. The valve stem extends through one end away from the rotating arc baffle to the side of the sealing cover plate away from the shaft cylinder and is equipped with a handwheel.

[0013] Compared with the known prior art, the technical solution provided by the utility model has the following beneficial effects:

[0014] 1. Set a shaft cylinder that extends into the pipeline, and install two annular airbags on the outer wall of the shaft cylinder. The first annular airbag squeezes the pipeline port, and the internal air is transported to the second annular airbag through the shaft cylinder. The second annular airbag extends into the pipeline along with the shaft cylinder. When the internal air intake expands, it will gradually expand until it is completely fitted with the inner wall of the pipeline to achieve sealing of the pipeline. This plugging head can change its own outer diameter to quickly plug pipelines with different aperture specifications, and has the advantage of being easy to use;

[0015] 2. In order to prevent the second annular airbag from leaking and reducing its volume after expansion, a rotating arc baffle is set in the inner cavity of the shaft cylinder. When the rotating arc baffle and the fixed arc baffle in the inner cavity of the shaft cylinder form a 360° seal, the inner cavity of the shaft cylinder is sealed, and the handwheel for controlling the rotating arc baffle is set outside the pipeline, which has the advantage of being easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall first-view structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0019] Figure 3 This is a schematic diagram of the structure of the utility model after the parts are disassembled;

[0020] Figure 4 This is a schematic diagram of the valve assembly installation structure of the utility model.

[0021] The numbers in the figure represent respectively: 1. Sealing cover plate; 11. Shaft cylinder; 12. Fixed arc baffle; 13. First air inlet and exhaust hole; 14. Second air inlet and exhaust hole; 15. Limiting ring; 16. Circular stopper; 17. Ring handle; 2. First annular air bag; 21. Third air inlet and exhaust hole; 3. Second annular air bag; 31. Fourth air inlet and exhaust hole; 41. Valve stem; 42. Rotating arc baffle; 43. Hand wheel. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model is further described below in conjunction with embodiments.

[0024] Example 1

[0025] Reference Figure 1-4, which is the first embodiment of the utility model, discloses a plugging head for pipeline sealing, including a plugging cover plate 1 and a shaft cylinder 11 installed on one side of the plugging cover plate 1 and extending into the pipeline, two fixed arc-shaped baffles 12 symmetrically distributed in the center are fixedly installed in the shaft cylinder 11, and the first annular airbag 2 is fixedly sleeved on the outer cylinder wall of the shaft cylinder 11 and squeezed and conflicted with the pipeline port, so that the internal air is forced to enter the second annular airbag 3 by squeezing, and the second annular airbag 3 is fixedly sleeved on the outer cylinder wall of the shaft cylinder 11 and squeezed and conflicted with the inner wall of the pipeline, and the pipeline is blocked by volume expansion, the first An annular airbag 2 is connected to a second annular airbag 3 through the inner cavity of the shaft cylinder 11. The valve assembly includes a rotating arc baffle 42 arranged in the shaft cylinder 11 for controlling the air circulation in the inner cavity of the shaft cylinder 11 and forming a 360° circular blockage with two fixed arc baffles 12. The specifications of the four arc baffles are exactly the same. The two fixed arc baffles 12 are located in the same vertical plane, and the two rotating arc baffles 42 are located in the same vertical plane. The two vertical planes are adjacent to each other on the left and right, and each arc baffle is an arc plate with a 90° opening, so when rotated open, it will be in a 360° circular blockage state.

[0026] Example 2

[0027] Reference Figure 1-4 , which is the second embodiment of the utility model. This embodiment is different from the first embodiment in that: the outer cylinder wall of the shaft cylinder 11 penetrates the inner cavity to open a plurality of first air inlet and exhaust holes 13 and a second air inlet and exhaust holes 14 distributed in a circular array, a limiting ring 15 is fixedly mounted on the end of the shaft cylinder 11 away from the blocking cover plate 1, and a circular stopper 16 is fixedly installed on the end of the shaft cylinder 11 away from the blocking cover plate 1, and the second annular airbag 3 is arranged between the limiting ring 15 and the circular stopper 16, so that the second annular airbag 3 will expand outward along the gap between the limiting ring 15 and the circular stopper 16, which has a certain guiding effect, and an annular handle 17 is fixedly installed on the side of the blocking cover plate 1 away from the shaft cylinder 11, and the inner ring wall of the first annular airbag 2 penetrates the inner cavity to open a plurality of third air inlet and exhaust holes 21, and the first annular airbag 2 passes through the plurality of third air inlet and exhaust holes 21 The first air inlet and outlet holes 13 are connected to the inner cavity of the shaft cylinder 11, and the first air inlet and outlet holes 13 and the corresponding third air inlet and outlet holes 21 completely overlap with each other, and there will be no leakage problem. The inner ring wall of the second annular airbag 3 penetrates through the inner cavity to open a plurality of fourth air inlet and outlet holes 31. The second annular airbag 3 is connected to the inner cavity of the shaft cylinder 11 through the fourth air inlet and outlet holes 31 and the second air inlet and outlet holes 14, and the second air inlet and outlet holes 14 and the corresponding fourth air inlet and outlet holes 31 completely overlap with each other, and there will be no leakage problem. The valve assembly also includes a valve stem 41 which is rotatably installed in the inner cavity of the shaft cylinder 11 and has two rotating arc baffles 42 fixedly installed on the outer shaft wall. The end of the valve stem 41 away from the rotating arc baffle 42 extends through and extends to the side of the sealing cover plate 1 away from the shaft cylinder 11, and is equipped with a hand wheel 43. The hand wheel 43 is always arranged outside the pipeline for easy operation.

[0028] The remaining structures are the same as those of Example 1.

[0029] The workflow of this utility model is as follows:

[0030] First, hold the annular handle 17, extend the shaft cylinder 11 together with the second annular airbag 3 into the pipe to be blocked, and squeeze the pipe in the axial direction of the pipe, so that the first annular airbag 2 is forced to be squeezed and reduced in volume, and the air in the first annular airbag 2 is forced to enter the inner cavity of the shaft cylinder 11 through the third inlet and outlet holes 21 and the corresponding first inlet and outlet holes 13, and enter the inner cavity of the second annular airbag 3 through the second inlet and outlet holes 14 and the fourth inlet and outlet holes 31, so that the volume of the second annular airbag 3 increases and expands, and gradually expands until it is completely fitted with the inner wall of the pipe, thereby sealing the pipe;

[0031] Secondly, the hand wheel 43 is rotated, thereby driving the valve stem 42 to rotate 90°, so that the two rotating arc baffles 41 rotate to form a 360° distribution with the two fixed arc baffles 12, completely blocking the inner cavity of the shaft cylinder 11. At this time, even if the first annular airbag 2 is no longer squeezed, the first annular airbag 2 will not return to its original state, because the air accumulated in the second annular airbag 3 is blocked and cannot flow back into the first annular airbag 2;

[0032] Finally, when the plugging head needs to be removed from the pipeline, it is only necessary to rotate the hand wheel 43 again to drive the valve stem 42 to rotate 90°, so that the two rotating arc baffles 41 rotate to a state of complete overlap with the two fixed arc baffles 12. At this time, the inner cavity of the shaft cylinder 11 is unobstructed, and the air in the second annular airbag 3 will flow back to the first annular airbag 2 through the inner cavity of the shaft cylinder 11. The second annular airbag 3 is reduced in volume and no longer squeezes and conflicts with the inner wall of the pipeline, so there will be no relative friction resistance, thereby facilitating the removal of the entire plugging head from the pipeline.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plugging head for pipeline sealing, comprising a plugging cover plate (1) and a shaft cylinder (11) mounted on one side of the plugging cover plate (1) and extending into the pipeline, characterized in that: Two fixed arc-shaped baffles (12) are fixedly installed in the shaft cylinder (11) and are distributed symmetrically with respect to the center, and further include: The first annular airbag (2) is fixedly sleeved on the outer wall of the shaft cylinder (11) and is pressed against the pipe port; The second annular airbag (3) is fixedly sleeved on the outer wall of the shaft cylinder (11) and is pressed against the inner wall of the pipeline. The first annular airbag (2) is connected to the second annular airbag (3) through the inner cavity of the shaft cylinder (11); The valve assembly comprises a rotating arc baffle (42) arranged in a shaft cylinder (11) and used for controlling the air flow in the inner cavity of the shaft cylinder (11) and forming a 360° circular blockage with two fixed arc baffles (12).

2. A plugging head for pipeline sealing according to claim 1, characterized in that: The outer cylinder wall of the shaft cylinder (11) penetrates the inner cavity and is provided with a plurality of first air inlet and outlet holes (13) and second air inlet and outlet holes (14) distributed in a circular array.

3. The plugging head for pipeline sealing according to claim 1, characterized in that: A limiting ring (15) is fixedly mounted on one end of the shaft cylinder (11) away from the blocking cover plate (1), a circular stopper (16) is fixedly mounted on one end of the shaft cylinder (11) away from the blocking cover plate (1), the second annular airbag (3) is arranged between the limiting ring (15) and the circular stopper (16), and an annular handle (17) is fixedly mounted on one side of the blocking cover plate (1) away from the shaft cylinder (11).

4. A plugging head for pipeline sealing according to claim 2, characterized in that: The inner ring wall of the first annular airbag (2) is provided with a plurality of third inlet and outlet holes (21) penetrating the inner cavity, and the first annular airbag (2) is connected to the inner cavity of the shaft cylinder (11) through the plurality of third inlet and outlet holes (21) and the plurality of first inlet and outlet holes (13).

5. The plugging head for pipeline sealing according to claim 2, characterized in that: The inner ring wall of the second annular airbag (3) is provided with a plurality of fourth inlet and outlet holes (31) penetrating the inner cavity, and the second annular airbag (3) is connected to the inner cavity of the shaft cylinder (11) through the plurality of fourth inlet and outlet holes (31) and the plurality of second inlet and outlet holes (14).

6. The plugging head for pipeline sealing according to claim 1, characterized in that: The valve assembly further comprises a valve stem (41) which is rotatably mounted in the inner cavity of the shaft cylinder (11) and has two rotating arc-shaped baffles (42) fixedly mounted on the outer shaft wall; the valve stem (41) extends through one end away from the rotating arc-shaped baffles (42) to the side of the sealing cover plate (1) away from the shaft cylinder (11) and is provided with a hand wheel (43).

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