Temporary plugging device for pipeline

Abstract

The utility model discloses a temporary pipeline plugging device which comprises an outer skin made of high-elasticity rubber, a metal framework is further arranged in the skin and comprises a circle of circumferential steel belt, and a head end connecting piece and a tail end connecting piece are arranged on the axis of the metal framework. The head end connecting piece and the tail end connecting piece are each provided with a plurality of supporting rods which are rotationally connected to a circumferential steel belt. The supporting rods are bilaterally symmetrical in the axial direction, namely the supporting rods for connecting the head end connecting piece and the tail end connecting piece are the same in number and angle and are in one-to-one correspondence; a central shaft is arranged on the axis of the metal framework, at least one part of the central shaft is provided with external threads, the central shaft is connected with the tail end connecting piece through a bearing, and the central shaft is connected with the head end connecting piece through threads; the steel belt is in an end-to-end circular ring shape, the head end of the steel belt is provided with a section with a C-shaped opening, and the tail end of the steel belt extends into the C-shaped opening and is clamped in the C-shaped opening, so that the tail end can only move perpendicular to the section relative to the head end. The pipeline plugging device does not need to use a power source or an air source, and can complete pipeline plugging only by means of a machine type device; and only the center shaft needs to be rotated during operation, and use is quite convenient.

Description

Technical Field

[0001] The utility model belongs to municipal equipment, in particular to a temporary pipeline blocking device. Background Art

[0002] With the acceleration of urbanization, urban infrastructure construction is constantly expanding, and problems such as pipeline damage and aging are inevitable. In order to cope with these emergencies, it is urgent to develop temporary blocking technology to ensure the normal operation of urban water supply, drainage, heating and other facilities. The temporary blocking technology of municipal pipelines is mainly used to deal with pipeline rupture, breakage or failure caused by urban traffic accidents, building demolition, water conservancy project construction and other reasons. In the prior art, the commonly used blocking device is the airbag blocking, which places the airbag at the position to be blocked, and then inflates the airbag to expand it, thereby blocking the entire pipeline cross-section. The disadvantage of this method is that it requires a gas source and power supply at the construction site, and it takes a long time to inflate. It is not safe, has poor stability, and may even cause secondary disasters.

[0003] CN206221891U also discloses a pipeline plugging device, comprising an elastic airbag (1) capable of sealing gas inside, a screw sleeve (2) penetrating the inside of the elastic airbag (1), the elastic airbag (1) and the screw sleeve (2) being sealed; a tensioning device is inserted into the screw sleeve (2), the water-side of the tensioning device is sealed with the screw sleeve (2); the tensioning device can gather the two ends of the screw sleeve (2) toward the center to expand the elastic airbag (1). This method has very high requirements on the sealing performance of each component, so the failure rate is also very high. Summary of the invention

[0004] The utility model aims to overcome the defects of the prior art and provide a pipeline temporary plugging device with better effect.

[0005] To this end, the utility model adopts the following technical solution: a temporary pipe plugging device, comprising an outer skin made of high-elastic rubber, characterized in that: there is also a metal skeleton inside the skin, the metal skeleton includes a circle of circumferential steel belt, a head end connector and a terminal connector are provided on its axis, the head end connector and the terminal connector each have a number of struts rotatably connected to the circumferential steel belt; the struts are symmetrical in the axial direction, that is, the number of struts connecting the head end connector and the terminal connector are the same, the angle is the same and they correspond one to one; there is a central axis on the axis of the metal skeleton, at least a part of the central axis has an external thread, the central axis is connected to the terminal connector by a bearing, and the central axis is connected to the head end connector by a thread; the steel belt is a circular ring connected head to tail, wherein the head end has a C-shaped opening cross-section, the tail end extends into the C-shaped opening and is stuck therein, so that the tail end can only move perpendicular to the cross-section relative to the head end.

[0006] Furthermore, a plurality of circumferential slide rails are provided on the inner side of the steel belt, and a slider is provided on the slide rail; one end of the support rod is hinged on the slider, and the other end is hinged on the head end connector or the end connector.

[0007] The use of the utility model is as follows: in the initial state, the central axis is in a state of rotating outward to a relatively backward state, at which time the distance between the head end connector and the terminal connector is relatively far, and the angle of each strut relative to the axis of the metal frame is also relatively small; then the central axis is rotated inward to shorten the distance between the head end connector and the terminal connector, and the angle of each strut increases, so that the circumferential steel belt is stretched, that is, the overlapping length of the steel belt at the end of the connection is reduced, and the circumference of the steel belt is increased, which also means that the diameter of the steel belt is increased, so that the pipeline can be blocked. Observed from the outside of the skin, the initial state of the utility model is a relatively slender ellipsoid, which becomes a shorter and thicker ellipsoid after rotating the central axis. After the operation is completed, the central axis is rotated outward to return to the initial state, and the utility model can be taken out of the pipeline for next use. The design of the slide rail and the slider allows the hinge point between the strut and the steel belt to move circumferentially relative to the steel belt, so that when the steel belt is stretched, it can still maintain connection with the strut.

[0008] It can be seen from the above description that the utility model does not need to use power supply or gas source, and can complete the blocking of the pipeline only by the machine device; and the operation only requires rotating the central axis, which is very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of a longitudinal section of the utility model.

[0010] Figure 2 yes Figure 1 AA direction schematic diagram.

[0011] Figure 3 yes Figure 2 BB direction schematic diagram.

[0012] Figure 4 yes Figure 2 CC direction schematic diagram.

[0013] Figure 5 It is an application schematic diagram of the utility model. DETAILED DESCRIPTION

[0014] See the accompanying drawings. This embodiment includes a skin 9 and a metal frame inside the skin. The metal frame includes a central shaft 4, the right half of which is threaded, the right side of the central shaft 4 is a head end connector 5, and the left side is a terminal connector 6; the central shaft 4 is connected to the terminal connector 6 by a bearing, and is connected to the head end connector 5 by a thread.

[0015] The metal frame also includes a circumferential steel belt 1, which is a ring-shaped belt connected end to end, and the end to end parts thereof are marked as 1-2; Figure 3 It can be seen that this part can be divided into two layers, 1-2-1 and 1-2-2, where 1-2-1 has a semi-open cross section similar to a C shape, enclosing 1-2-2 inside so that 1-2-2 will not escape from 1-2-1, but can only move relative to the paper surface perpendicularly. 1-2-1 is the head end of the steel belt 1, and 1-2-2 is the tail end of the steel belt 1. In this way, the steel belt 1 is connected head to tail and can be stretched or contracted to a certain extent, that is, the length of 1-2-2 entering 1-2-1 is variable.

[0016] A plurality of slide rails 3 are arranged on one side of the steel belt 1 facing the center of the circle. Slide blocks 3 are sleeved inside the slide rails 3. The slide blocks 2 can slide circumferentially along the slide rails 3.

[0017] A plurality of support rods 7 are rotatably connected to the head end connection member 5 and the end connection member 6. Figure 2 It can be seen that they are each connected with eight support rods 7, one end of each of the support rods 7 is hinged to the head end connector 5 or the end end connector 6 via a hinge point 8, and the other end is hinged to the slider 2 via a hinge point.

[0018] In fact, the metal frame of this embodiment is somewhat similar to the frame design of an umbrella.

[0019] See also Figure 5 When this embodiment is used, the pipe 11 to be blocked is entered from the wellhead 10, and the central axis 4 is rotated to reduce the distance between the head end connector 5 and the end connector 6, and the angle of each support rod relative to the axis of the metal frame is increased, causing the circumference of the steel belt 1 to increase, and the embodiment as a whole becomes shorter and thicker, and the pipe 11 can be blocked. After the operation is completed, the operation is reversed, that is, the embodiment is removed for next use.

Claims

1. A temporary pipeline plugging device, comprising an outer skin made of high elastic rubber, characterized in that: There is also a metal skeleton inside the skin, which includes a circle of circumferential steel belt, on the axis of which a head end connector and a terminal connector are provided, and the head end connector and the terminal connector each have a number of struts rotatably connected to the circumferential steel belt; the struts are symmetrical in the axial direction, that is, the number of struts connecting the head end connector and the terminal connector are the same, the angles are the same, and they correspond one to one; there is a central axis on the axis of the metal skeleton, at least a part of the central axis has an external thread, the central axis is connected to the terminal connector by a bearing, and the central axis is connected to the head end connector by a thread; the steel belt is in the shape of a circular ring connected head to tail, wherein the head end has a C-shaped opening cross-section, the tail end extends into the C-shaped opening and is stuck therein, so that the tail end can only move perpendicular to the cross-section relative to the head end.

2. A temporary pipeline plugging device according to claim 1, characterized in that: A plurality of circumferential slide rails are arranged on the inner side of the steel belt, and a slider is arranged on the slide rail; one end of the support rod is hinged on the slider, and the other end is hinged on the head end connector or the end connector.

Images