Pipeline water cut-off device and installation method thereof

Abstract

The present invention relates to the technical field of pipeline maintenance auxiliary equipment, and proposes a pipeline water interception device and an installation method thereof, comprising an interception pipe, the interception pipe is used to be installed on a water supply pipe; a stop valve is arranged at one end of the interception pipe away from the water supply pipe; a sealing gasket is arranged on the outer wall of the interception pipe, and the outer wall of the sealing gasket abuts against the inner wall of the water supply pipe; a water baffle is detachably arranged at one end of the stop valve away from the interception pipe, and a water outlet gap is provided between the water baffle and the stop valve. Through the above technical scheme, the problem of the valve not being tightly closed and the inability to completely cut off the water for maintenance in the prior art after the municipal pipe network pipe is damaged is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline maintenance auxiliary equipment, and in particular to a pipeline water cut-off device and an installation method thereof. Background Art

[0002] The pipes generally used in the municipal water supply network include ductile iron pipes, spiral welded steel pipes, PE pipes, etc. In the daily operation of the pipe network, due to various reasons, there are often different degrees of pipe damage, which will cause a lot of water waste on the one hand; on the other hand, it will also affect the production and life of residents and enterprises and institutions in the relevant areas. If the repair cannot be completed in time, it may even cause instability in residents and society. Therefore, how to maximize the speed of emergency repair has always been an important topic for urban water supply management units. When repairing the pipeline, it is necessary to cut off the connection between the damaged pipeline and the municipal main network. Because the control valves of the municipal pipeline network are usually used for too long and lack maintenance, the internal part is prone to rust, and the valves are often not closed tightly. Most of the emergency repairs of pipelines, especially PE pipelines, must be done in dry fields, so more control valves have to be closed, which not only greatly increases the workload of valve operation, but also greatly expands the scope of water outage, and the social impact increases exponentially. Summary of the invention

[0003] The present invention provides a pipeline water cut-off device and an installation method thereof, which solves the problem in the related art that after a municipal pipe network pipe is damaged, the valve is not tightly closed and the water cannot be completely cut off for maintenance.

[0004] The technical solution of the present invention is as follows:

[0005] A pipeline water interception device, comprising:

[0006] An intercepting pipe, the intercepting pipe being used for installation on a water supply pipe;

[0007] A stop valve, the stop valve being arranged at one end of the intercepting pipe away from the water supply pipe;

[0008] A sealing gasket, wherein the sealing gasket is arranged on the outer wall of the intercepting pipe, and the outer wall of the sealing gasket abuts against the inner wall of the water supply pipe;

[0009] A water baffle is detachably arranged at one end of the stop valve away from the intercepting pipe, and a water outlet gap is provided between the water baffle and the stop valve.

[0010] Optionally, the outer wall of the intercepting pipe has a slot, the sealing gasket is located in the slot, and further comprises:

[0011] A sealing pressure ring is interference-fitted with the inner wall of the intercepting tube; the sealing pressure ring, the clamping groove at one end away from the stop valve, and the sealing gasket are located in the same plane.

[0012] Optionally, also include

[0013] An outer sleeve is sleeved on the outer wall of the water supply pipe, and the outer sleeve, the water supply pipe and the intercepting pipe are abutted in sequence.

[0014] Optionally, the sealing pressure ring has a clamping groove at one end away from the water baffle, and the clamping groove has a clamping surface, and further includes

[0015] A support rod, wherein the support rod is threadedly connected to the water baffle, one end of the support rod passes through the stop valve and is located in the water supply pipe, and is concentrically arranged with the water supply pipe;

[0016] A connecting seat, the connecting seat is rotatably arranged at one end of the supporting rod;

[0017] An expansion rod, one end of which is arranged on the connecting seat, and the other end is used to abut against the clamping surface. After the support rod is rotated, the expansion rod abuts against the clamping surface or cancels the abutment.

[0018] Optionally, the expansion rod is magnetic, and further comprises:

[0019] A magnet is arranged on the support rod, and one end of the expansion rod is close to the magnet after the contact with the clamping surface is cancelled.

[0020] Optionally, it also includes:

[0021] A cam is rotatably arranged on the support rod, the cam has a convex surface and a concave surface, the convex surface and the concave surface are alternately distributed at intervals, and after the cam rotates, the expansion rod abuts against the convex surface or the concave surface alternately.

[0022] Optionally, it also includes:

[0023] A ratchet, the ratchet being arranged on the support rod and having ratchet teeth;

[0024] A pawl, wherein the pawl is swingably arranged on the cam, and the pawl abuts against or cancels the abutment with the ratchet teeth after swinging;

[0025] A first elastic member is used for providing a force for the pawl to approach the ratchet tooth.

[0026] Optionally, the expansion rod is slidably arranged on the connecting seat, and further comprises:

[0027] A connecting rod, the connecting rod being arranged at one end of the connecting seat away from the supporting rod;

[0028] An adjustment seat, the adjustment seat is threadedly connected to the connecting rod, and the outer wall of the adjustment seat has a mounting groove;

[0029] A collar is rotatably arranged in the installation groove, and one end of the expansion rod is arranged on the collar.

[0030] Optionally, the stop valve has a connecting end, a mounting end and a spare end, the mounting end and the connecting end are located on the same straight line, the connecting end is connected to the intercepting pipe, the water baffle is arranged at the mounting end, and the water supply pipe is cut into two sections after being damaged, and further comprises:

[0031] A connecting pipe, both ends of which are respectively connected to the spare ends located on the two sections of the water supply pipes, and the connecting pipe is a flexible pipe.

[0032] A method for installing a pipeline water cut-off device is used to install a pipeline water cut-off device, and is characterized by comprising the following steps:

[0033] S1. Installation preparation: sequentially install the stop valve and the water retaining plate at one end of the intercepting pipe, and install the sealing gasket on the outer wall of the intercepting pipe;

[0034] S2. Installing a water cut-off device: closing the control valve, cutting the damaged portion of the water supply pipe into two sections, opening the stop valve, and installing water cut-off devices on both sections of the water supply pipe;

[0035] S3. Connecting the water cut-off device: close the stop valve, remove the water baffles on the water cut-off device in sequence, and install a pipeline between the two stop valves.

[0036] The working principle and beneficial effects of the present invention are:

[0037] In the present invention, in order to solve the problem in the related art that the valve is not closed tightly and the water cannot be completely cut off for maintenance after the municipal pipe network pipe is damaged, a water cut-off device composed of an intercepting pipe, a stop valve, a sealing gasket and a water baffle is designed. After the water supply pipe is damaged, the damaged part is cut off, and the stop valve and the sealing gasket are installed in sequence at one end of the intercepting pipe. At this time, the stop valve is in an open state, and then the sealing gasket is installed on the outer wall of the intercepting pipe. The water cut-off device is assembled, and the intercepting pipe is inserted into the inner wall of the water supply pipe. Due to the presence of the sealing gasket, no water will flow out between the water supply pipe and the intercepting pipe. Although the water can be cut off by closing the control valve, the control valve often has the problem of not closing tightly due to poor maintenance, and it is inconvenient to form a dry field working environment at the construction site. At this time, the water can be discharged through the water outlet gap between the stop valve and the water baffle, avoiding the problem of difficulty in installing the water cut-off device due to high water pressure. The water baffle can prevent water from flowing out of the stop valve and directly rushing to the staff opposite to the stop valve opening, avoiding harm to the staff. After the intercepting pipe is installed, close the stop valve, and the water flow is completely cut off. In the same way, install the water intercepting device at the adjacent water supply pipe joint. Finally, install the connecting pipe between the two stop valves and open the stop valve to complete the maintenance work. Compared with the traditional maintenance method, the emergency repair is faster, the construction difficulty is small, and the water loss in the emergency repair stage can be reduced. Even if the empty gate valve is not closed tightly, the water intercepting device can be installed under low water pressure without strict dry field operation requirements. There is no need to stop water supply in a large area, which can effectively reduce the social impact caused by the maintenance of water supply pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0039] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0040] Figure 2 This is a schematic diagram of the installation structure of the sealing gasket and the sealing pressure ring of the present invention;

[0041] Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0042] Figure 4 This is a structural diagram of Embodiment 2 of the present invention;

[0043] Figure 5 This is a schematic diagram of the partial structure of the second embodiment of the present invention;

[0044] Figure 6 This is another partial structural diagram of the second embodiment of the present invention.

[0045] In the figure: 1, intercepting pipe, 2, water supply pipe, 3, stop valve, 4, sealing gasket, 5, water baffle, 101, card groove, 6, sealing pressure ring, 7, outer sleeve, 601, card groove, 602, card surface, 8, support rod, 9, connecting seat, 10, expansion rod, 11, magnet, 12, cam, 1201, convex surface, 1202, concave surface, 13, ratchet, 1301, ratchet, 14, pawl, 15, connecting rod, 16, adjusting seat, 1601, mounting groove, 17, collar, 301, connecting end, 302, mounting end, 303, spare end, 18, connecting pipe. DETAILED DESCRIPTION

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0047] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0048] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0050] Reference Figure 1~Figure 3 , which is the first embodiment of the present invention, proposes a pipeline water interception device, including an intercepting pipe 1, which is used to be installed on a water supply pipe 2; a stop valve 3 is arranged at an end of the intercepting pipe 1 away from the water supply pipe 2; a sealing gasket 4 is arranged on the outer wall of the intercepting pipe 1, and the outer wall of the sealing gasket 4 abuts against the inner wall of the water supply pipe 2; a water baffle 5 is detachably arranged at the end of the stop valve 3 away from the intercepting pipe 1, and a water outlet gap is provided between the water baffle 5 and the stop valve 3.

[0051] In the present invention, in order to solve the problem in the related art that the valve is not closed tightly and the water cannot be completely cut off for maintenance after the municipal pipe network pipe is damaged, a water cut-off device consisting of an intercepting pipe 1, a stop valve 3, a sealing gasket 4 and a water retaining plate 5 is designed. After the water supply pipe 2 is damaged, the damaged part is cut off, and the stop valve 3 and the sealing gasket 4 are installed in sequence at one end of the intercepting pipe 1. At this time, the stop valve 3 is in an open state, and then the sealing gasket 4 is installed on the outer wall of the intercepting pipe 1. The water cut-off device is assembled, and the intercepting pipe 1 is inserted into the inner wall of the water supply pipe 2. Due to the presence of the sealing gasket 4, no water will flow out between the water supply pipe 2 and the intercepting pipe 1. Although the water can be cut off by closing the control valve, the control valve often has the problem of not closing tightly due to poor maintenance, and it is inconvenient to form a dry field working environment at the construction site. At this time, the water can be discharged through the water outlet gap between the stop valve 3 and the water retaining plate 5, avoiding the problem of difficulty in installing the water cut-off device due to high water pressure. The water retaining plate 5 can prevent water from flowing out of the stop valve 3 and directly rushing to the staff opposite to the opening of the stop valve 3, thereby avoiding harm to the staff. After the interception pipe 1 is installed, the stop valve 3 is closed. At this time, the water flow is completely cut off. In the same way, a water cut-off device is also installed at the joint of the adjacent water supply pipe 2. Finally, a connecting pipe is installed between the two stop valves 3 and the stop valve 3 is opened to complete the maintenance work. Compared with traditional maintenance methods, the emergency repair speed is faster, the construction difficulty is small, and the water loss in the emergency repair stage can be reduced. Even if the empty gate valve is not closed tightly, the water cut-off device can be installed under low water pressure without strict dry field operation requirements. There is no need to stop water in a large area, which can effectively reduce the social impact caused by repairing the water supply pipe 2.

[0052] Furthermore, the outer wall of the intercepting pipe 1 has a groove 101, and the sealing gasket 4 is located in the groove 101. It also includes a sealing pressure ring 6, which has an interference fit with the inner wall of the intercepting pipe 1. The sealing pressure ring 6, the groove 101 at one end away from the stop valve 3, and the sealing gasket 4 are located in the same plane.

[0053] In this embodiment, in order to improve the sealing performance of the water interception device and avoid the problem that the sealing gasket 4 cannot be accurately installed in place during the process of inserting the intercepting pipe 1 into the water supply pipe 2, a clamping groove 101 for installing the sealing gasket 4 is provided on the outer side of the intercepting pipe 1, and the sealing gasket 4 is positioned by the clamping groove 101 to reduce the situation that the sealing gasket 4 is twisted and falls off during the process of inserting the intercepting pipe 1 into the water supply pipe 2. After the intercepting pipe 1 is inserted into place, the sealing pressure ring 6 is installed to the position corresponding to the clamping groove 101 in the intercepting pipe 1, and the clamping groove 101 and the sealing gasket 4 are stretched outward by the sealing pressure ring 6, so that a reliable seal is formed between the water supply pipe 2 and the intercepting pipe 1.

[0054] Furthermore, it also includes an outer sleeve 7, which is sleeved on the outer wall of the water supply pipe 2, and the outer sleeve 7, the water supply pipe 2 and the intercepting pipe 1 are abutted in sequence.

[0055] In this embodiment, when the water supply pipe 2 is made of PE material, considering that the pipe itself has a certain ductility, the deformation of the pipe may affect the sealing performance of the gasket 4, making it impossible for the gasket 4 to reach the designed compression ratio, thereby failing to achieve sealed internal connection. An outer sleeve 7 with strong rigidity can be added in advance to the outside of the water supply pipe 2 to be repaired and at the position where the gasket 4 is installed. The outer sleeve 7 can be made of metal material. The water supply pipe 2 is completely covered by the outer sleeve 7 and the intercepting pipe 1, which plays a role in limiting the deformation of the PE pipe and achieving internal pressure sealing.

[0056] Furthermore, the sealing pressure ring 6 has a snap-in groove 601 at one end away from the water baffle plate 5, and the snap-in groove 601 has a snap-in surface 602. It also includes a support rod 8, which is threadedly connected to the water baffle plate 5. One end of the support rod 8 passes through the stop valve 3 and is located in the water supply pipe 2, and is concentrically arranged with the water supply pipe 2; a connecting seat 9 is rotatably arranged at one end of the support rod 8; one end of the expansion rod 10 is arranged on the connecting seat 9, and the other end is used to abut against the snap-in surface 602. After the support rod 8 rotates, the expansion rod 10 abuts against the snap-in surface 602 or cancels the abutment.

[0057] In this embodiment, since the sealing pressure ring 6 needs to open the slot 101 and the sealing gasket 4 outward, the fit between the sealing pressure ring 6 and the intercepting pipe 1 is an interference fit. In order to facilitate the installation of the sealing pressure ring 6, a support rod 8 is provided on the water baffle 5. One end of the support rod 8 is rotatably mounted with a connecting seat 9. One end of the expansion rod 10 is arranged on the connecting seat 9, and the other end has a tendency to approach the support rod 8. Before the intercepting pipe 1 is inserted into the water supply pipe 2, the connecting seat 9 is installed at one end of the support rod 8. After the support rod 8 is installed on the water baffle 5, the sealing pressure ring 6 is sleeved on the inner wall of the end of the intercepting pipe 1 away from the water baffle 5, and one end of the expansion rod 10 is clamped on the clamping surface 602. Then, the intercepting pipe 1 is inserted into the water supply pipe 2. After being inserted into place, the support rod 8 is rotated, and the support rod 8 slides toward the end away from the water supply pipe 2. Since the expansion rod 10 is clamped with the clamping surface 602, the sealing pressure ring 6 is installed to the corresponding position by the push of the expansion rod 10. The support rod 8 is threadedly connected to the water baffle 5, which makes it easier to control the moving distance of the sealing pressure ring 6. In order to make the sealing pressure ring 6 more evenly stressed during the process of pushing the sealing pressure ring 6, a plurality of expansion rods 10 are evenly spaced around the connecting seat 9. After the sealing pressure ring 6 is installed in place, the support rod 8 is rotated in the opposite direction. At this time, the support rod 8 can move toward one end of the water supply pipe 2, so that the expansion rod 10 exits the clamping groove 601. After the expansion rod 10 exits the clamping groove 601, the free end moves toward the direction close to the support rod 8. After the water baffle 5 is removed, the support rod 8, the connecting seat 9 and the expansion rod 10 can be taken out from between the water supply pipe 2 simultaneously. A hand wheel can be installed at the end of the support rod 8 away from the connecting seat 9 to facilitate the rotation of the support rod 8.

[0058] Furthermore, the expansion rod 10 is magnetic and further comprises a magnet 11 . The magnet 11 is arranged on the support rod 8 . One end of the expansion rod 10 is removed from the abutment with the clamping surface 602 and then approaches the magnet 11 .

[0059] In this embodiment, a magnet 11 is installed on the support rod 8, and the sealing pressure ring 6 is installed in place. After the expansion rod 10 is pushed out of the clamping groove 601, the expansion rod 10 is reset through the magnetic adsorption effect of the magnet 11 and the expansion rod 10. The operation is simple and convenient, and is not affected by the impact of water flow, and has better reliability.

[0060] Further, refer to Figure 4~Figure 6 , which is the second embodiment of the present invention, further includes a cam 12 based on the first embodiment. The cam 12 is rotatably set on the support rod 8. The cam 12 has a convex surface 1201 and a concave surface 1202. The convex surface 1201 and the concave surface 1202 are alternately distributed. After the cam 12 rotates, the expansion rod 10 alternately abuts against the convex surface 1201 or the concave surface 1202.

[0061] In this embodiment, in order to facilitate the clamping of one end of the expansion rod 10 with the clamping surface 602 and reduce the workload of the staff, a cam 12 is provided on the support rod 8. By rotating the cam 12, the convex surface 1201 of the cam 12 abuts against the expansion rod 10 and the expansion rod 10 is stretched. When the support rod 8 needs to be removed, the cam 12 is rotated again to make the concave surface 1202 abut against the expansion rod 10, and the expansion rod 10 can be reset. At this time, the expansion rod 10 can pass through the stop valve 3.

[0062] Furthermore, it also includes a ratchet 13, which is set on the support rod 8 and has a ratchet tooth 1301; a pawl 14 is swingably set on the cam 12, and the pawl 14 abuts against or cancels the abutment with the ratchet tooth 1301 after swinging; the first elastic member is used to provide a force for the pawl 14 to approach the ratchet tooth 1301.

[0063] In this embodiment, a ratchet 13 and a pawl 14 are respectively provided on the support rod 8 and the cam 12, so as to control the state of the cam 12. When the expansion rod 10 is required to push the sealing pressure ring 6 to slide in the intercepting tube 1, during the process of rotating the support rod 8, although the ratchet 13 rotates with the support rod 8, the pawl 14 slides in sequence along the ratchet teeth 1301, and the cam 12 does not rotate at this time. Under the action of the cam 12 and the clamping surface 602, the expansion rod 10 can stably push the sealing pressure ring 6 to slide. After the sealing pressure ring 6 slides into place, the support rod 8 is reversed, and the ratchet teeth 1301 abut against the pawl 14, and then during the rotation of the support rod 8, the cam 12 is driven to slide, so that the concave surface 1202 of the cam 12 contacts the expansion rod 10, and the expansion rod 10 is reset under the action of the magnet 11. When the cam 12 needs to open the expansion rod 10 again, it only needs to continue to rotate the support rod 8 along the rotation direction of the support rod 8 when the water retaining plate 5 is disassembled, so that the convex surface 1201 can abut against the expansion rod 10 again.

[0064] Furthermore, the expansion rod 10 is slidably set on the connecting seat 9, and also includes a connecting rod 15, which is set at one end of the connecting seat 9 away from the support rod 8; the adjustment seat 16 is threadedly connected to the connecting rod 15, and the outer wall of the adjustment seat 16 has a mounting groove 1601; the ring 17 is rotatably set in the mounting groove 1601, and one end of the expansion rod 10 is set on the ring 17.

[0065] In this embodiment, in order to make the water cut-off device adapt to the maintenance of water supply pipes 2 with different pipe diameters, the expansion rod 10 is slidably set on the connecting seat 9, and the adjusting seat 16 can be rotated to make the adjusting seat 16 close to or away from the connecting seat 9, thereby adjusting the length of the expansion rod 10 on one side of the support rod 8, so that the expansion rod 10 can be clamped with the sealing pressure ring 6 of different diameters when it is stretched. When in use, the intercepting pipe 1, the stop valve 3, the sealing pressure ring 6 and the sealing gasket 4 can be selected according to the different pipe diameters of the water supply pipe 2. The water baffle 5, the support rod 8, the connecting seat 9, the expansion rod 10, etc. can be reused, and only the length of the expansion rod 10 needs to be adjusted according to the situation.

[0066] Furthermore, the stop valve 3 has a connecting end 301, an installation end 302 and a spare end 303. The installation end 302 and the connecting end 301 are located on the same straight line. The connecting end 301 is connected to the intercepting pipe 1. The water retaining plate 5 is arranged on the installation end 302. The water supply pipe 2 is cut into two sections after being damaged. It also includes a connecting pipe 18. The two ends of the connecting pipe 18 are respectively connected to the spare ends 303 located on the two sections of the water supply pipe 2. The connecting pipe 18 is a flexible pipe.

[0067] In this embodiment, the stop valve 3 is a three-way structure. After the intercepting pipe 1 is inserted into the water supply pipe 2, the connecting pipe 18 is connected to the spare ends 303 on the two sections of the water supply pipe 2. By controlling the stop valve 3, the water supply pipe 2 is connected to the spare end 303, and the water supply can be temporarily restored. Subsequent maintenance can be carried out without affecting the water supply. Then, according to the maintenance requirements, the pipe 18 can be connected between the two installation ends 302, thereby effectively reducing the social impact. The connecting pipe 18 is a flexible pipe, which is not affected by the direction of the damaged water supply pipe 2 and has better adaptability.

[0068] A method for installing a pipeline water cut-off device is used to install a pipeline water cut-off device, and is characterized by comprising the following steps:

[0069] S1. Installation preparation: Install the stop valve 3 and the water retaining plate 5 at one end of the intercepting pipe 1 in sequence, and install the sealing gasket 4 on the outer wall of the intercepting pipe 1;

[0070] S2. Install the water cut-off device: close the control valve, cut the damaged part of the water supply pipe 2 into two sections, open the stop valve 3, and install the water cut-off device on both sections of the water supply pipe 2;

[0071] S3. Connect the water cut-off device: close the stop valve 3, remove the water baffle plates 5 on the water cut-off device in sequence, and install a pipeline between the two stop valves 3.

[0072] In this embodiment, a method for installing a pipeline water interception device is proposed. After the water supply pipe 2 is damaged, the damaged part is cut off, and a stop valve 3 and a sealing gasket 4 are installed at one end of the interception pipe 1 in sequence. At this time, the stop valve 3 is in an open state, and then the sealing gasket 4 is installed on the outer wall of the interception pipe 1. The water interception device is assembled, and the interception pipe 1 is inserted into the inner wall of the water supply pipe 2. Due to the presence of the sealing gasket 4, no water will flow out between the water supply pipe 2 and the interception pipe 1. Although the water can be cut off by closing the control valve, the control valve often has the problem of not closing tightly due to poor maintenance, and it is inconvenient to form a dry field working environment at the construction site. At this time, the water can be discharged through the water outlet gap between the stop valve 3 and the water retaining plate 5, avoiding the problem of difficulty in installing the water interception device due to high water pressure. The water retaining plate 5 can prevent the water from flowing out of the stop valve 3 and directly rushing to the staff opposite to the opening of the stop valve 3, avoiding harm to the staff. After the intercepting pipe 1 is installed, the stop valve 3 is closed. At this time, the water flow is completely cut off. In the same way, the water intercepting device is also installed at the joint of the adjacent water supply pipe 2. Finally, a connecting pipe is installed between the two stop valves 3 and the stop valve 3 is opened to complete the maintenance work. Compared with the traditional maintenance method, the emergency repair speed is faster, the construction difficulty is small, and the water loss in the emergency repair stage can be reduced. Even if the empty gate valve is not closed tightly, the water intercepting device can be installed under low water pressure without strict dry field operation requirements. There is no need to stop water in a large area, which can effectively reduce the social impact caused by the maintenance of the water supply pipe 2.

[0073] It should be noted that 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A pipeline water cut-off device, characterized in that: include: An intercepting pipe (1), the intercepting pipe (1) being used for being installed on a water supply pipe (2); a stop valve (3), the stop valve (3) being arranged at an end of the intercepting pipe (1) away from the water supply pipe (2); A sealing gasket (4), the sealing gasket (4) being arranged on the outer wall of the intercepting pipe (1), the outer wall of the sealing gasket (4) abutting against the inner wall of the water supply pipe (2); a water baffle (5), the water baffle (5) being detachably arranged at an end of the stop valve (3) away from the intercepting pipe (1), and a water outlet gap being provided between the water baffle (5) and the stop valve (3); The outer wall of the intercepting pipe (1) has a slot (101), the sealing gasket (4) is located in the slot (101), and further comprises: A sealing pressure ring (6), the sealing pressure ring (6) being interference fit with the inner wall of the intercepting tube (1), the sealing pressure ring (6), the clamping groove (101) and the sealing gasket (4) being located in the same plane; The sealing pressure ring (6) has a clamping groove (601) at one end away from the water baffle plate (5), and the clamping groove (601) has a clamping surface (602). A support rod (8), the support rod (8) being threadedly connected to the water baffle (5), one end of the support rod (8) passing through the stop valve (3) and then being located in the water supply pipe (2), and being arranged concentrically with the water supply pipe (2); A connecting seat (9), the connecting seat (9) being rotatably arranged at one end of the supporting rod (8); an expansion rod (10), one end of the expansion rod (10) being arranged on the connection seat (9), and the other end being used to abut against the clamping surface (602), and after the support rod (8) is rotated, the expansion rod (10) abuts against or stops abutting against the clamping surface (602); The expansion rod (10) is magnetic and further comprises: A magnet (11), wherein the magnet (11) is arranged on the support rod (8), and one end of the expansion rod (10) is moved closer to the magnet (11) after the abutment with the clamping surface (602) is cancelled; Also includes: A cam (12), the cam (12) being rotatably disposed on the support rod (8), the cam (12) having a convex surface (1201) and a concave surface (1202), the convex surface (1201) and the concave surface (1202) being alternately spaced, and after the cam (12) is rotated, the expansion rod (10) alternately abuts against the convex surface (1201) or the concave surface (1202); Also includes: A ratchet (13), the ratchet (13) being arranged on the support rod (8), the ratchet (13) having ratchet teeth (1301); A ratchet pawl (14), the ratchet pawl (14) being swingably disposed on the cam (12), the ratchet pawl (14) abutting against or canceling the abutment with the ratchet tooth (1301) after the ratchet pawl (14) swings; a first elastic member, the first elastic member being used to provide a force for the pawl (14) to approach the ratchet tooth (1301); The expansion rod (10) is slidably disposed on the connection seat (9), and further comprises: A connecting rod (15), the connecting rod (15) being arranged at an end of the connecting seat (9) away from the supporting rod (8); An adjustment seat (16), the adjustment seat (16) being threadedly connected to the connecting rod (15), and an outer wall of the adjustment seat (16) having a mounting groove (1601); A collar (17), the collar (17) being rotatably disposed in the mounting groove (1601), and one end of the expansion rod (10) being disposed on the collar (17).

2. A pipeline water cut-off device according to claim 1, characterized in that: Also includes: An outer sleeve (7), the outer sleeve (7) being sleeved on the outer wall of the water supply pipe (2), the outer sleeve (7), the water supply pipe (2) and the intercepting pipe (1) being abutted in sequence.

3. A pipeline water cut-off device according to claim 1, characterized in that: The stop valve (3) comprises a connection end (301), a mounting end (302) and a standby end (303), the mounting end (302) and the connection end (301) being located on the same straight line, the connection end (301) being in communication with the intercepting pipe (1), the water baffle (5) being arranged at the mounting end (302), the water supply pipe (2) being cut into two sections after being damaged, and further comprising: A connecting pipe (18), wherein both ends of the connecting pipe (18) are respectively connected to the spare ends (303) located on the two sections of the water supply pipe (2), and the connecting pipe (18) is a flexible pipe.

4. A method for installing a pipeline water cut-off device, used for installing a pipeline water cut-off device according to any one of claims 1 to 3, characterized in that: The steps include: S1. Installation preparation: installing the stop valve (3) and the water retaining plate (5) in sequence at one end of the intercepting pipe (1), and installing the sealing gasket (4) on the outer wall of the intercepting pipe (1); S2. Installing a water cut-off device: closing the control valve, cutting the damaged portion of the water supply pipe (2) into two sections, opening the stop valve (3), and installing a water cut-off device on both sections of the water supply pipe (2); S3. Connecting the water cut-off device: close the stop valve (3), remove the water baffle plates (5) on the water cut-off device in sequence, and install a pipeline between the two stop valves (3).

Images