A one-way occlusion device for pipe waterstops

Abstract

The application discloses a one-way plugging device for pipeline water stop, comprising: a rubber water stop cone, which is attached to the edge of the pipeline for water stop plugging of the pipeline; a bidirectional screw rod, one end of which penetrates through the rubber water stop cone, for driving the rubber water stop cone to move during rotation; and a spreading mechanism, which is arranged at the other end of the bidirectional screw rod, for unfolding and shrinking during rotation of the bidirectional screw rod. The application can press the rubber water stop cone to move and compress inside the pipeline, thereby guaranteeing the sealing property of the pipeline water stop plugging, and when the rubber water stop cone is impacted by water, the spreading mechanism can be used to share the corresponding impact pressure, the unfolding and supporting speed of the pull rod can be accelerated, the efficiency of the spreading mechanism during unfolding can be improved, the actual use of the device is facilitated, the structure is simple and convenient to operate, the device can be repeatedly used, the anti-seepage performance is good, one-way plugging can be performed from the side without water, the device is suitable for different diameter casings and pipelines, material loss is reduced, work efficiency is improved, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline water sealing, in particular to a one-way sealing device for pipeline water sealing. BACKGROUND

[0002] Underground pipelines are generally used for transporting rainwater and domestic sewage, but due to long-term use, cracks or holes may appear on the sidewall of the pipeline due to corrosion and other reasons. At this time, the rainwater and sewage in the drainage pipeline will seep out, which cannot achieve good drainage effect. Therefore, it is necessary to urgently seal the broken pipeline to ensure its perfect drainage function and facilitate maintenance.

[0003] Common sealing methods for drainage sleeves or pipelines include air bag sealing, sleeve outer welding steel plate sealing, etc. Different pipeline diameters require corresponding sealing materials in terms of material and specification. In addition, the operation needs to be performed from both sides of the sleeve and pipeline, which has great limitations in the use process. There are also problems of poor sealing effect, low construction efficiency, high installation and removal cost in the sealing process.

[0004] Therefore, the present application provides a one-way sealing device for pipeline water sealing to solve the above technical problems. SUMMARY

[0005] The main purpose of the present application is to provide a one-way sealing device for multi-aperture pipeline water sealing, which is simple in structure, reusable, capable of one-way sealing from the water-free side, and suitable for different diameter sleeves and pipelines for pipeline water sealing.

[0006] The present application solves the above technical problems by adopting the following technical solutions:

[0007] A one-way sealing device for pipeline water sealing, comprising:

[0008] A rubber water stop cone is attached to the edge of the pipeline for water sealing and sealing of the pipeline;

[0009] A bidirectional screw rod passes through one end of the rubber water stop cone and is used to drive the rubber water stop cone to move during rotation;

[0010] A spreading mechanism is provided at the other end of the bidirectional screw rod and is used to expand and contract during rotation of the bidirectional screw rod.

[0011] Preferably, the spreading mechanism includes a movable nut threaded on the bidirectional screw rod, a limiting movable assembly fixed on the bidirectional screw rod, two groups of symmetrically arranged pull rods hinged to the limiting movable assembly, and two groups of symmetrically arranged support rods hinged to the movable nut, the support rods and the pull rods are connected, and the support rods and the rubber water stop cone are connected through a connecting piece.

[0012] Preferably, the limiting movable assembly comprises a fixed plate fixed on the bidirectional screw, an annular groove opened on the outer side of the fixed plate and an annular clamping block rotating in the annular groove, the annular clamping block and the pull rod are hingedly connected with each other.

[0013] Preferably, the connecting piece is arranged as two groups of symmetrical connecting rods hingedly connected on the rubber waterstop cone, and the other ends of the connecting rods are hingedly connected on the supporting rod, and the rubber waterstop cone is threadedly rotated on the bidirectional screw.

[0014] Preferably, the supporting mechanism further comprises a limiting sliding groove opened on the pull rod near the side of the bidirectional screw and a limiting sliding block sliding in the limiting sliding groove and used for hingedly connecting the other end of the supporting rod.

[0015] Preferably, a plurality of anti-skid mechanisms for limiting the sliding of the limiting sliding block are arranged on the pull rod at positions corresponding to the limiting sliding grooves, the anti-skid mechanism comprises a clamping block sliding groove opened on the pull rod, a T-shaped clamping block sliding in the clamping block sliding groove and having a protruding end penetrating into the limiting sliding groove and a plurality of connecting springs arranged on the T-shaped clamping block and connected with the clamping block sliding groove.

[0016] Preferably, one end of the bidirectional screw is provided with a pushing mechanism for pressing the rubber waterstop cone to move into the pipe, the pushing mechanism comprises a mountain-shaped nut threadedly rotating on the bidirectional screw near or away from the rubber waterstop cone and a rubber gasket arranged between the mountain-shaped nut and the rubber waterstop cone.

[0017] Preferably, the pushing mechanism further comprises an annular limiting groove opened on the rubber gasket and an annular limiting block arranged on the mountain-shaped nut and rotating in the annular limiting groove.

[0018] Preferably, a detachable rubber handle is arranged at one end of the bidirectional screw outside the pipe.

[0019] Preferably, the specific operation steps of the water sealing and plugging of the pipe comprise:

[0020] S1. The bidirectional screw is inserted into the pipe until the rubber waterstop cone is attached to the edge of the pipe, at this time, the supporting mechanism is located in the pipe;

[0021] S2. The bidirectional screw is rotated to expand the supporting mechanism and connect with the inner wall of the pipe, at this time, the rubber waterstop cone is pushed into the pipe to complete the water sealing and plugging;

[0022] S3. After the plugging is completed, the bidirectional screw is reversely rotated to pull out the rubber waterstop cone from the pipe, at this time, the supporting mechanism is contracted and folded, and then the device is taken out for repeated use.

[0023] The application provides a one-way plugging device for pipe water sealing. Compared with the prior art, the beneficial effects of the application are embodied in:

[0024] 1. The present application sets up the advancing mechanism, when the device is fixed at one end of the pipeline, the rubber water stop cone can be pressed to move to the inside of the pipeline by rotating the hill-shaped nut, thereby ensuring the sealing of the pipeline water stop, and when the rubber water stop cone is impacted by water, it can also prevent the rubber water stop cone from sliding out of the pipeline, and at the same time, the ring-shaped limiting block and the ring-shaped limiting groove of the advancing mechanism can drive the rubber gasket to move to the outside of the pipeline by rotating the hill-shaped nut in reverse, and at this time, the bidirectional screw rod can be folded by reversing, thereby completing the disassembly of the device in the pipeline, facilitating repeated use.

[0025] 2. The present application has the advantages of simple structure, easy operation, good anti-seepage performance, one-way sealing from the water-free side, suitability for different diameter casings and pipelines, reduced material loss, improved work efficiency and reduced cost.

[0026] 3. The present application sets up the connecting piece to connect the conical water stop cone and the supporting mechanism, which can ensure that the movable nut normally rotates on the bidirectional screw rod when the bidirectional screw rod rotates, thereby avoiding the situation that the supporting mechanism is driven to rotate synchronously with the bidirectional screw rod due to the small friction between the movable nut and the bidirectional screw rod, which cannot complete the unfolding of the supporting structure and affects the overall use of the device.

[0027] 4. The present application sets up the connecting piece to connect the conical water stop cone and the supporting rod, which can accelerate the unfolding and supporting speed of the pull rod by rotating the bidirectional screw rod in cooperation with the sliding of the limiting sliding block when the rubber water stop cone and the bidirectional screw rod are threadedly connected, thereby improving the efficiency of the unfolding of the supporting mechanism and facilitating the actual use of the device.

[0028] 5. The present application sets up the connecting piece to connect the conical water stop cone and the supporting rod, when the rubber water stop cone in the pipeline is impacted by the water flow in the hole, the water flow can press the anti-skid mechanism on the surface of the pull rod, and then the limiting sliding block is limited and fixed in the limiting sliding groove by the T-shaped clamping block, at this time, when the conical water stop block is impacted by the water flow, the connecting piece and the supporting mechanism can share the corresponding impact pressure, thereby avoiding the movement of the rubber water stop cone in the pipeline and improving the water stop sealing strength in the pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 It is the overall perspective view of the present application;

[0031] Figure 2 It is the perspective schematic view of the supporting mechanism of the present application;

[0032] Figure 3 It is the perspective schematic view of the limiting movable assembly of the present application;

[0033] Figure 4 is a perspective view of the anti-skid mechanism of the present application;

[0034] Figure 5 is a sectional view of the anti-skid mechanism of the present application;

[0035] Figure 6 is a sectional view of the anti-skid mechanism of the present application;

[0036] Figure 7 is a perspective view of the connecting member being a telescopic rod of the present application;

[0037] Figure 8 is a sectional view of the connecting member being a telescopic rod of the present application;

[0038] Figure 9 is a perspective view of the advancing mechanism of the present application.

[0039] in the figure:

[0040] 1, bidirectional screw; 11, rubber handle; 2, rubber waterstop cone; 3, advancing mechanism; 31, conical nut; 32, rubber gasket; 33, annular limiting block; 34, annular limiting groove; 4, opening mechanism; 41, supporting rod; 42, pull rod; 43, movable nut; 44, limiting movable assembly; 441, fixed plate; 442, annular groove; 443, annular clamping block; 45, limiting sliding groove; 46, limiting sliding block; 5, connecting member; 51, connecting rod; 52, telescopic rod; 6, anti-skid mechanism; 61, T-shaped clamping block; 62, connecting spring; 63, clamping block sliding groove. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0042] In addition, in the embodiments of the present application, "a plurality of" means two or more. In addition, the technical solutions in the embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0043] In the first embodiment, see Figure 1 , Figure 3and Figure 6 .

[0044] As Figure 6 shown, the present application provides a one-way sealing device for pipeline water stop, comprising:

[0045] A rubber water stop cone 2 is arranged on the edge of the pipeline for water sealing;

[0046] A bidirectional screw rod 1 passes through the rubber water stop cone 2 at one end, and is used to drive the rubber water stop cone 2 to move during rotation. The bidirectional screw rod 1 is provided with a detachable rubber handle 11 at one end outside the pipeline, which facilitates manual control of the bidirectional screw rod 1 rotation by the operator. The rubber water stop cone 2 can be screwed on the bidirectional screw rod 1, and the movement during screwing is achieved by the friction force at the edge of the pipeline. It should be noted that the rubber water stop cone 2 can be provided with friction lines along the direction of the conical slope at this time. In addition, a pushing mechanism 3 outside the pipeline can be used to drive the rubber water stop cone 2 to move by driving the pushing mechanism 3 to run when the bidirectional screw rod 1 is rotated.

[0047] A spreading mechanism 4 is arranged at the other end of the bidirectional screw rod 1, which is used to expand and contract during the rotation of the bidirectional screw rod 1.

[0048] In specific implementation, as Figure 6 shown, the device is placed at the edge of the pipeline, at which time the rubber water stop cone 2 is arranged on the edge of the pipeline. The bidirectional screw rod 1 is rotated clockwise on the rubber water stop cone 2 by using the friction force between the rubber water stop cone 2 and the edge of the pipeline, which can drive the rubber water stop cone 2 to move while ensuring that the spreading mechanism 4 is expanded in the pipeline. When the spreading mechanism 4 is expanded to a certain extent, the device as a whole is fixed at one end of the pipeline by the spreading mechanism 4, and the rubber water stop cone 2 is located in the pipeline to complete the water sealing of one end of the pipeline.

[0049] Among them, the rubber water stop cone 2 is a conical water stop rubber plug structure, which is used in conjunction with the edge of the pipeline when the conical slope is arranged. The bidirectional screw rod 1 is a screw rod with reverse threads at both ends, which can drive the objects connected by threads at both ends to move in opposite directions when the screw rod is rotated.

[0050] As Figure 1As shown, the expansion mechanism 4 includes a movable nut 43 threaded on the bidirectional screw rod 1, a limiting movable assembly 44 fixed on the bidirectional screw rod 1, two groups of symmetrically arranged pull rods 42 hinged on the limiting movable assembly 44, and two groups of symmetrically arranged support rods 41 hinged on the movable nut 43. The support rods 41 and the pull rods 42 are connected, and the support rods 41 and the rubber water stop cone 2 are connected through the connecting piece 5. The connecting piece 5 can ensure that the movable nut 43 is normally threaded on the bidirectional screw rod 1 when the bidirectional screw rod 1 rotates, avoiding the situation that the expansion mechanism is driven to rotate synchronously with the bidirectional screw rod 1 due to too small friction between the movable nut 43 and the bidirectional screw rod 1, which cannot complete the expansion of the expansion structure and affects the overall use of the device.

[0051] In specific implementation, as shown in Figure 3 , the limiting movable assembly 44 can be provided with a fixed plate 441 fixed on the bidirectional screw rod 1, an annular groove 442 opened on the outer side of the fixed plate 441, and an annular clamping block 443 rotated in the annular groove 442. The annular clamping block 443 and the pull rod 42 are hinged with each other. At this time, since the rubber water stop cone 2 is arranged in close contact with the edge of the pipeline, when the screw rod rotates, the friction between the rubber water stop cone 2 and the edge of the pipeline is combined with the connection of the connecting piece 5, so that the movable nut 43 approaches or moves away from the limiting movable assembly 44. Since the movable nut 43 and the pull rod 42 are hinged with the movable support rod 41, when the movable nut 43 approaches or moves away from the limiting movable assembly 44, the pull rod 42 can be controlled to rotate around the hinged connection point of the limiting movable assembly 44, and then the pull rod 42 is folded or expanded to close to the inner wall of the pipeline.

[0052] When the bidirectional screw rod 1 rotates, a rotation limiting structure can be additionally installed outside the pipeline to ensure that the bidirectional screw rod 1 can only rotate after being inserted into the pipeline, avoiding the movement of the bidirectional screw rod 1 during rotation, which affects the sealing effect of the rubber water stop cone 2.

[0053] On the basis of the above embodiment, a second embodiment is proposed, which is described in detail in Figure 1 and Figure 6 .

[0054] As shown in Figure 1 and Figure 6 , the connecting piece 5 is provided as two groups of symmetrically arranged connecting rods 51 hinged on the rubber water stop cone 2, and the other end of the connecting rod 51 is hinged on the support rod 41.

[0055] In specific implementation, as shown in Figure 6As shown in the drawings, the device is placed at the edge of the pipeline, at which time the rubber water stop cone 2 is arranged in close contact with the edge of the pipeline. By using the friction force between the rubber water stop cone 2 and the edge of the pipeline and the use of the connecting rod 51, the expansion mechanism 4 can be expanded in the pipeline when the bidirectional screw rod 1 rotates. When the expansion mechanism 4 is expanded to a certain extent, the whole device is fixed at one end of the pipeline through the expansion mechanism 4. At this time, the connecting part between the pull rod 42 and the support rod 41 moves towards the inside of the pipeline, so that the rubber water stop plug can be pulled by the pull rod 42 to move towards the inside of the pipeline. When the rubber water stop cone 2 is located in the pipeline, the water sealing and plugging of one end of the pipeline is completed.

[0056] On the basis of the above embodiment, a third embodiment is proposed, which is described in detail in Figure 1 and Figure 6 .

[0057] As shown in Figure 1 and Figure 6 , the rubber water stop cone 2 is screwed on the bidirectional screw rod 1. At this time, the rubber water stop cone 2 can be provided with friction lines along the direction of the conical slope.

[0058] In specific implementation, as shown in Figure 6 , the device is placed at the edge of the pipeline, at which time the rubber water stop cone 2 is arranged in close contact with the edge of the pipeline. By using the friction force between the rubber water stop cone 2 and the edge of the pipeline, the expansion mechanism 4 can be expanded in the pipeline when the bidirectional screw rod 1 rotates, and at the same time, the rubber water stop cone 2 is driven to move towards the inside of the pipeline. When the rubber water stop cone 2 is located in the pipeline, the water sealing and plugging of one end of the pipeline is completed.

[0059] It should be noted that when the rubber water stop cone 2 is rotated and installed on the bidirectional screw rod 1, the bidirectional screw rod 1 can be rotated by adding a rotating limiting structure outside the pipeline to ensure that the bidirectional screw rod 1 can only rotate after being inserted into the pipeline.

[0060] On the basis of the above embodiment, a fourth embodiment is proposed, which is described in detail in Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 .

[0061] As shown in Figure 1 and Figure 2 , the expansion mechanism 4 further includes a limiting sliding groove 45 opened on the pull rod 42 near the side of the bidirectional screw rod 1 and a limiting sliding block 46 sliding in the limiting sliding groove 45 for hingedly connecting the other end of the support rod 41.

[0062] As shown in Figure 1 and Figure 6As shown, when the rubber water stop cone 2 is threaded on the bidirectional screw rod 1, due to the moving distance of the rubber water stop cone 2 being far greater than the displacement distance of the connecting part of the supporting rod 41 and the connecting piece 5, the rotation of the bidirectional screw rod 1 is matched with the sliding of the limiting sliding block 46, so that the unfolding and supporting speed of the pull rod 42 is accelerated, the efficiency of the supporting mechanism during unfolding is improved, and the actual use of the device is facilitated.

[0063] In addition, as shown in Figure 4 and Figure 5 , a plurality of anti-skid mechanisms 6 for limiting the sliding of the limiting sliding block 46 can be arranged on the pull rod 42 corresponding to the position of the limiting sliding groove 45, and the anti-skid mechanism 6 comprises a clamping block sliding groove 63 arranged on the pull rod 42, a T-shaped clamping block 61 sliding in the clamping block sliding groove 63 and having a protruding end penetrating into the limiting sliding groove 45, and a plurality of connecting springs 62 arranged on the T-shaped clamping block 61 and connected with the clamping block sliding groove 63.

[0064] When the rubber water stop cone 2 in the pipeline is impacted by the water flow in the hole, the water flow can press the anti-skid mechanism 6 on the surface of the pull rod 42, and then the T-shaped clamping block 61 is used to limit and fix the limiting sliding block 46 in the limiting sliding groove 45. At this time, when the conical water stop block is impacted by the water flow, the connecting piece 5 and the unfolding mechanism 4 can be used to share the corresponding impact pressure, so as to prevent the rubber water stop cone 2 from moving in the pipeline and improve the water stop sealing strength in the pipeline.

[0065] Based on the above embodiment, a fifth embodiment is proposed, which is described in detail in Figure 1 and Figure 9 .

[0066] As shown in Figure 1 , one end of the bidirectional screw rod 1 is provided with a pushing mechanism 3 for pressing the rubber water stop cone 2 to move towards the inside of the pipeline, and the pushing mechanism 3 comprises a mountain-shaped nut 31 threaded on the bidirectional screw rod 1 and close to or away from the rubber water stop cone 2, and a rubber gasket 32 arranged between the mountain-shaped nut 31 and the rubber water stop cone 2. During the specific use of the device, when the bidirectional screw rod 1 is only the rubber water stop cone 2, the rotation of the mountain-shaped nut 31 on the bidirectional screw rod 1 can press the rubber water stop cone 2 to move towards the inside of the pipeline.

[0067] In addition, as shown in Figure 9 , the rubber gasket 32 can be cylindrical, and the pushing mechanism 3 further comprises an annular limiting groove 34 arranged on the rubber gasket 32 and an annular limiting block 33 arranged on the mountain-shaped nut 31 and used to rotate in the annular limiting groove 34. When the rubber gasket 32 and the rubber water stop cone 2 are fixed, the reverse rotation of the mountain-shaped nut 31 can be used to control the rubber water stop cone 2 to separate from the pipeline after the sealing and water stopping of the pipeline is completed. Then, counterclockwise rotation of the bidirectional screw rod 1 can fold and shrink the unfolding mechanism 4. Therefore, the device can be reused after the sealing operation is completed, so that the device can be disassembled in the pipeline.

[0068] In summary, when the device is fixed at one end of the pipeline, the rotation of the trapezoidal nut 31 can press the rubber water stop cone 2 to move towards the inside of the pipeline, thereby ensuring the sealing of the pipeline water stop sealing, and preventing the rubber water stop cone 2 from sliding out of the pipeline under water impact. At the same time, the annular limiting block 33 and the annular limiting groove 34 of the advancing mechanism 3 can drive the rubber gasket 32 to move the rubber water stop cone 2 out of the pipeline by reversing the trapezoidal nut 31, and the supporting mechanism can be folded by reversing the bidirectional screw rod 1, thereby completing the disassembly of the device in the pipeline, facilitating repeated use.

[0069] Based on the above embodiment, a sixth embodiment is proposed, which is described in detail in Figure 7 and Figure 8 .

[0070] The connecting piece 5 can also be provided as two sets of symmetrically arranged telescopic rods 52 hinged to the rubber water stop cone 2, and the other end of the telescopic rod 52 is hinged to the supporting rod 41. By placing the rubber water stop cone 2 on the edge of the pipeline, the friction between the rubber water stop cone 2 and the pipeline is used in combination with the telescopic rod 52 to ensure that the movable nut 43 normally threads on the bidirectional screw rod 1 when the bidirectional screw rod 1 is rotated. At this time, the movable nut 43 is close to or away from the limiting movable assembly 44, so as to ensure the control of the unfolding and folding of the supporting mechanism 4 in the pipeline. When the supporting mechanism 4 is unfolded to a certain extent, the device is fixed at one end of the pipeline, facilitating the use of the advancing mechanism 3.

[0071] Based on the above embodiment, a seventh embodiment is proposed, which is described in detail in Figure 6 and Figure 8 .

[0072] Referring to Figure 6 and Figure 8 , the specific operation steps of using the device for pipeline water stop sealing can include:

[0073] S1. Extend the bidirectional screw rod 1 into the pipeline until the rubber water stop cone 2 is attached to the edge of the pipeline, and at this time the supporting mechanism 4 is located inside the pipeline;

[0074] S2. Rotate the bidirectional screw rod 1 to unfold the supporting mechanism 4 and connect it to the inner wall of the pipeline, at this time the rubber water stop cone 2 is pushed into the pipeline to complete the water stop sealing;

[0075] S3. After sealing, reverse the trapezoidal nut 31 and the bidirectional screw rod 1 to pull out the rubber water stop cone 2 from the pipeline, at this time the supporting mechanism 4 is folded, and then the device is taken out for repeated use.

[0076] In conclusion, the device has simple structure, is convenient to operate, can be repeatedly used, has good anti-seepage performance, can perform one-way sealing from the water-free end, is suitable for casings and pipelines with different diameters, reduces material loss, improves work efficiency, and reduces cost.

[0077] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A one-way occlusion device for use in the waterstop of a pipe, characterized in that The utility model relates to a water sealing device for pipeline, which comprises: a rubber water stop cone (2) is arranged on the edge of the pipeline to seal the pipeline; a bidirectional screw rod (1) is arranged on one end of the rubber water stop cone (2) to drive the rubber water stop cone (2) to move during rotation; a stretching mechanism (4) is arranged on the other end of the bidirectional screw rod (1) to expand and contract during rotation of the bidirectional screw rod (1); the stretching mechanism (4) comprises a movable nut (43) threaded on the bidirectional screw rod (1), a limiting movable assembly (44) fixed on the bidirectional screw rod (1), two groups of symmetrical pull rods (42) hinged on the limiting movable assembly (44), and two groups of symmetrical support rods (41) hinged on the movable nut (43), the support rods (41) are connected with the pull rods (42), and the support rods (41) are connected with the rubber water stop cone (2) through connecting pieces (5); the connecting pieces (5) are arranged as two groups of symmetrical connecting rods (51) hinged on the rubber water stop cone (2), and the other ends of the connecting rods (51) are hinged on the support rods (41), and the rubber water stop cone (2) is threaded on the bidirectional screw rod (1); the stretching mechanism (4) further comprises a limiting sliding groove (45) arranged on one side of the pull rod (42) close to the bidirectional screw rod (1) and a limiting sliding block (46) sliding in the limiting sliding groove (45) and used for hinging the other end of the support rod (41); a plurality of anti-skid mechanisms (6) for limiting sliding of the limiting sliding block (46) are arranged on the pull rod (42) corresponding to the position of the limiting sliding groove (45), the anti-skid mechanism (6) comprises a clamping block sliding groove (63) arranged on the pull rod (42), a T-shaped clamping block (61) sliding in the clamping block sliding groove (63) and having a convex end penetrating into the limiting sliding groove (45), and a plurality of connecting springs (62) arranged on the T-shaped clamping block (61) and connected with the clamping block sliding groove (63).

2. A one-way occlusion device for use in the waterstop of pipes as claimed in claim 1, characterized in that, the limiting movable assembly (44) comprises a fixed plate (441) fixed on the bidirectional screw rod (1), an annular groove (442) arranged on the outer side of the fixed plate (441), and an annular clamping block (443) rotating in the annular groove (442), and the annular clamping block (443) and the pull rod (42) are hinged with each other.

3. A one-way occlusion device for use in the waterstop of pipes according to claim 1, characterized in that, one end of the bidirectional screw rod (1) is provided with a propelling mechanism (3) for pressing the rubber water stop cone (2) to move to the inside of the pipeline, the propelling mechanism (3) comprises a mountain-shaped nut (31) threaded on the bidirectional screw rod (1) close to or away from the rubber water stop cone (2), and a rubber gasket (32) arranged between the mountain-shaped nut (31) and the rubber water stop cone (2).

4. A one-way blanking plug for use in the waterstop of pipes according to claim 3, characterized in that, the propelling mechanism (3) further comprises an annular limiting groove (34) arranged on the rubber gasket (32) and an annular limiting block (33) arranged on the mountain-shaped nut (31) and rotating in the annular limiting groove (34).

5. A one-way plug for use in sealing a pipe as defined in claim 1, wherein, a detachable rubber handle (11) is arranged on one end of the pipeline outside the bidirectional screw rod (1).

6. A one-way plug device for use in sealing a pipe joint as defined in claim 1, wherein the specific operation steps of the water sealing device for pipeline include: S1. The bidirectional screw (1) is extended into the pipeline until the rubber waterstop cone (2) is attached to the edge of the pipeline, at which time the expansion mechanism (4) is located inside the pipeline; S2. Rotate the bidirectional screw (1) to unfold the expansion mechanism (4) and connect it with the inner wall of the pipeline, at which time the rubber waterstop cone (2) is pushed into the pipeline to complete the waterstop sealing; S3. After sealing is completed, reverse rotation of the bidirectional screw (1) pulls out the rubber waterstop cone (2) from the pipeline, at which time the expansion mechanism (4) is retracted and folded, after which the device is removed for repeated use.

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