Plug-type sealing device replacing pipeline inlet and outlet inspection valves and use method thereof

Abstract

The present invention discloses a plug-type sealing device for replacing pipeline inlet and outlet inspection valves and a method of using the device, which includes a sealing plug, a sealing cover and an end cover, etc.; one end of the sealing plug is hemispherical, and the other end is connected to a circular sealing cover; the sealing cover is connected to the end cover by bolts; a sealing air belt is provided on one side of the hemispherical shape of the sealing plug, which contacts and seals with the inner wall of the pipeline; a rubber sealing plate is provided on the sealing cover, which has self-compression performance under the water pressure of the pool after the water in the pipeline is emptied. The device adopts a hollow metal structure, and the head of the device is a spherical surface, so as to facilitate docking with the pipeline; the cross-section can be specially designed according to the shape of the pipeline inlet / outlet, and its overall specific gravity can be adjusted to be close to that of water, so as to facilitate mobile installation in the pool, and double sealing is achieved by using air pressure and water pressure, which solves the problem that the existing water pump inlet and outlet inspection valves have low utilization rate and waste of resources, and has the characteristics of simple and reliable structure, easy disassembly and carrying, and good sealing effect.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline sealing for maintenance of pump stations and water plants, and specifically comprises a plug-type sealing device for replacing pipeline inlet and outlet maintenance valves and a use method thereof. Background Art

[0002] The layout of a pump station with an inlet pool and a circular inlet pipe is usually as follows: pump station forebay, pump inlet pipe, pump inlet inspection valve (manual or electric butterfly valve), pump outlet quick valve (energy storage hydraulic butterfly valve or hydraulic ball valve), pump outlet inspection valve (manual or electric butterfly valve), and pump outlet pipe.

[0003] The utilization rate of the water pump inlet / outlet inspection valve is low and it is only used when the water pump is inspected. Under normal operating conditions, the water pump is overhauled once every 3 to 4 years or longer. Therefore, it is possible to consider eliminating the inspection valve and using an economical and reliable sealing device instead. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a plug-type sealing device and a method of use for replacing pipeline inlet and outlet inspection valves. The device adopts a hollow metal structure, and the head of the device is a spherical surface, so as to facilitate docking with the pipeline; the cross-section can be specially designed according to the shape of the pipeline inlet / outlet, and its overall specific gravity can be adjusted to be close to water, so as to facilitate mobile installation in a water pool, and double sealing is achieved by using air pressure and water pressure, which solves the problem of low utilization rate of existing water pump inlet and outlet inspection valves and waste of resources. The device has the characteristics of simple and reliable structure, easy disassembly and carrying, and good sealing effect.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a plug-type sealing device that replaces the pipeline inlet and outlet inspection valves, which includes a sealing plug, one end of the sealing plug is a hemispherical structure, and the other end is connected to a circular sealing cover; one side of the sealing cover is connected to an end cover by bolts; a sealing belt is provided on one side of the hemispherical shape of the sealing plug, which is in contact with the inner wall of the pipeline for sealing.

[0006] The sealing plug is a hollow metal structure; an outer surface of one end of the spherical surface of the sealing plug is provided with a first annular groove.

[0007] An air belt is arranged in the first groove.

[0008] The air belt is provided with an inflation port, one end of which extends into the interior of the hollow sealing plug.

[0009] The sealing cover is provided with a through slot hole, one end of the inflation tube passes through the slot hole and extends into the hollow sealing plug to cooperate with the inflation port; the other end of the inflation tube is connected to external compressed air.

[0010] The diameter of the bottom surface of the sealing plug is determined according to the inner diameter of the pipeline; the outer diameter of the sealing cover is larger than the outer diameter of the pipeline.

[0011] The surface of the sealing cover in contact with the end surface of the pipeline is provided with an annular second groove; a rubber sealing plate is arranged in the second groove.

[0012] The method for using the plug-type sealing device as a replacement for the pipeline inlet and outlet inspection valve as described above comprises the following steps:

[0013] S1, assemble the sealing device, connect the inflation pipe to the inflation port, tighten the end cover with bolts, and then carry out air tightness test and strength test;

[0014] S2, align one end of the spherical surface of the sealing plug with the port of the pipeline to complete the docking, so that the rubber sealing plate on the surface of the sealing plate is aligned with the end surface of the pipeline;

[0015] S3, inflate the air belt through the inflation pipe, so that the sealing plug is tightly attached to the inner wall of the pipe, completing the first seal and pipe wall seal;

[0016] S4, drain the water in the pipeline. Under the action of water pressure, the sealing cover and the end cover at the end face of the pipeline are pressed tightly against the end face of the inlet and outlet of the pipeline, and cooperate with the rubber sealing plate to further ensure the reliability of the seal, completing the second seal;

[0017] S5. When the water pump is overhauled or in other situations, if the sealing device needs to be removed, just deflate the air belt to relieve the pressure, and then fill the pipe with water. Under the action of the internal water pressure, the sealing plug can detach automatically.

[0018] A plug-type sealing device that replaces the inlet and outlet inspection valves of pipelines includes a sealing plug, one end of which is a hemispherical structure, and the other end is connected to a circular sealing cover; one side of the sealing cover is connected to an end cover by bolts; a sealing belt is provided on the hemispherical side of the sealing plug, which contacts and seals with the inner wall of the pipeline. The device adopts a hollow metal structure, and the head of the device is a spherical surface, so as to facilitate docking with the pipeline; the cross-section can be specially designed according to the shape of the pipeline inlet / outlet, and its overall specific gravity can be adjusted to be close to water, so as to facilitate mobile installation in a pool, and double sealing is achieved by using air pressure and water pressure. The structure is simple and reliable, easy to disassemble and carry, and has a good sealing effect.

[0019] In the preferred solution, the sealing plug is a hollow metal structure; the outer surface of one end of the spherical surface of the sealing plug is provided with an annular first groove. The structure is simple, and when in use, the hollow metal structure not only ensures the structural strength of the device, but also reduces the weight and material cost of the device, and the specific gravity can be adjusted to be similar to that of water by changing the volume of the device and the thickness of the shell, so as to facilitate movement in water.

[0020] In a preferred solution, an air belt is installed in the first groove. The structure is simple, and when in use, a circle of air belt can be inflated and closely attached to the inner wall of the pipeline to achieve a good sealing effect.

[0021] In the preferred solution, an air inlet is provided on the air belt, and one end of the air inlet extends into the hollow sealing plug. The structure is simple, and when in use, sealant is applied to the hole of the sealing plug shell through which the air inlet passes; the end cover can be opened to connect the air inlet tube to the extended air inlet, and the operation is very convenient.

[0022] In the preferred solution, a through slot is provided on the sealing cover, one end of the inflation tube passes through the slot and extends into the hollow sealing plug to cooperate with the inflation port; the other end of the inflation tube is connected to external compressed air. The structure is simple, and when in use, a sealant is provided in the slot, and the inflation tube and the inflation port are independently separated, which is convenient for later disassembly and storage of the device.

[0023] In the preferred solution, the diameter of the bottom surface of the sealing plug is determined according to the inner diameter of the pipeline; the outer diameter of the sealing cover is larger than the outer diameter of the pipeline. The structure is simple, and when in use, the diameter of the device is adapted to the diameter of the pipeline, which improves the adaptability of the device.

[0024] In the preferred solution, the surface of the sealing cover in contact with the end face of the pipeline is provided with an annular second groove; a rubber sealing plate is installed in the second groove. The structure is simple, and when in use, the rubber sealing plate is aligned with the annular cross section at the pipeline port. After the sealing of the inflatable belt is completed, the water in the pipeline is drained. At this time, due to the water pressure difference between the inside and outside, the rubber sealing plate will be pressed against the pipeline port by the water pressure, realizing "self-compression sealing", further improving the sealing ability of the device.

[0025] In a preferred embodiment, a method for using a plug-type sealing device to replace a pipeline inlet and outlet inspection valve comprises the following steps:

[0026] S1, assemble the sealing device, connect the inflation pipe to the inflation port, tighten the end cover with bolts, and then carry out air tightness test and strength test;

[0027] S2, align one end of the spherical surface of the sealing plug with the port of the pipeline to complete the docking, so that the rubber sealing plate on the surface of the sealing plate is aligned with the end surface of the pipeline;

[0028] S3, inflate the air belt through the inflation pipe, so that the sealing plug is tightly attached to the inner wall of the pipe, completing the first seal and pipe wall seal;

[0029] S4, drain the water in the pipeline. Under the action of water pressure, the sealing cover and the end cover at the end face of the pipeline are pressed tightly against the end face of the inlet and outlet of the pipeline, and cooperate with the rubber sealing plate to further ensure the reliability of the seal, completing the second seal;

[0030] S5. When the water pump is overhauled or in other situations, if the sealing device needs to be removed, just deflate the air belt to relieve the pressure, and then fill the pipe with water. Under the action of the internal water pressure, the sealing plug can detach automatically.

[0031] A plug-type sealing device and a method of using the plug-type sealing device for replacing the inlet and outlet inspection valves of pipelines, comprising a sealing plug, one end of which is a hemispherical structure, and the other end is connected to a circular sealing cover; one side of the sealing cover is connected to an end cover by bolts; a sealing belt is provided on one side of the hemispherical shape of the sealing plug, which contacts and seals with the inner wall of the pipeline. The device adopts a hollow metal structure, and the head of the device is a spherical surface, so as to facilitate docking with the pipeline; the cross section can be specially designed according to the shape of the inlet / outlet of the pipeline, and its overall specific gravity can be adjusted to be close to that of water, so as to facilitate mobile installation in a pool, and double sealing is achieved by using air pressure and water pressure, which solves the problem of low utilization rate of existing inlet and outlet inspection valves of water pumps, resulting in waste of resources, and has the characteristics of simple and reliable structure, easy disassembly and carrying, and good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention.

[0033] Figure 2 It is a schematic diagram of the structure of point A in the present invention.

[0034] The reference numerals in the figure are: sealing plug 1, first groove 11, air belt 12, inflation port 13, sealing cover 2, second groove 21, end cover 3, inflation tube 4, rubber sealing plate 5. DETAILED DESCRIPTION

[0035] like Figure 1~Figure 2 In the invention, a plug-type sealing device is provided to replace the inlet and outlet inspection valves of pipelines, which includes a sealing plug 1, one end of which is a hemispherical structure, and the other end is connected to a circular sealing cover 2; one side of the sealing cover 2 is connected to an end cover 3 by bolts; a sealing belt is provided on the hemispherical side of the sealing plug 1, which contacts and seals with the inner wall of the pipeline. The device adopts a hollow metal structure, and the head of the device is a spherical surface, so as to facilitate docking with the pipeline; the cross section can be specially designed according to the shape of the inlet / outlet of the pipeline, and its overall specific gravity can be adjusted to be close to that of water, so as to facilitate mobile installation in the pool, and double sealing is achieved by using air pressure and water pressure. The structure is simple and reliable, easy to disassemble and carry, and has a good sealing effect.

[0036] In the preferred solution, the sealing plug 1 is a hollow metal structure; the outer surface of one end of the spherical surface of the sealing plug 1 is provided with an annular first groove 11. The structure is simple, and when in use, the hollow metal structure not only ensures the structural strength of the device, but also reduces the weight and material cost of the device, and the specific gravity can be adjusted to be similar to that of water by changing the thickness of the outer shell, so as to facilitate movement in water.

[0037] In a preferred solution, an air belt 12 is installed in the first groove 11. The structure is simple, and when in use, a circle of air belt 12 can be inflated and closely attached to the inner wall of the pipeline to achieve a good sealing effect.

[0038] In the preferred solution, the air belt 12 is provided with an air filling port 13, one end of which extends into the hollow sealing plug 1. The structure is simple, and when in use, the air filling port 13 passes through the hole of the sealing plug 1 shell and the air filling port 13 is coated with sealant; the end cover 3 can be opened to connect the air filling tube 4 with the extended air filling port 13, and the operation is very convenient.

[0039] In the preferred solution, a through slot is provided on the sealing cover 2, one end of the inflation tube 4 passes through the slot and extends into the hollow sealing plug 1 to cooperate with the inflation port 13; the other end of the inflation tube 4 is connected to external compressed air. The structure is simple, and when in use, a sealant is provided in the slot, and the inflation tube 4 and the inflation port 13 are independently provided, so that the device can be disassembled and stored later.

[0040] In the preferred solution, the diameter of the bottom surface of the sealing plug 1 is determined according to the inner diameter of the pipeline; the outer diameter of the sealing cover 2 is larger than the outer diameter of the pipeline. The structure is simple, and when in use, the diameter of the device is adapted to the diameter of the pipeline, which improves the adaptability of the device.

[0041] In the preferred solution, the surface of the sealing cover 2 in contact with the end face of the pipeline is provided with an annular second groove 21; the second groove 21 is provided with a rubber sealing plate 5. The structure is simple, and when in use, the rubber sealing plate 5 is aligned and in contact with the annular cross section at the pipeline port. After the sealing of the inflatable belt is completed, the water in the pipeline is drained. At this time, due to the water pressure difference between the inside and outside, the rubber sealing plate 5 is pressed against the pipeline port by the water pressure, realizing "self-compression sealing", and further improving the sealing ability of the device.

[0042] In a preferred embodiment, a method for using a plug-type sealing device that replaces a pipeline inlet and outlet inspection valve comprises the following steps:

[0043] S1, assemble the sealing device, connect the inflation pipe 4 to the inflation port 13, tighten the end cover 3 with bolts, and then perform air tightness test and strength test;

[0044] S2, align one spherical end of the sealing plug 1 with the port of the pipeline to complete the docking, so that the rubber sealing plate 5 on the surface of the sealing plate is aligned with the end surface of the pipeline;

[0045] S3, inflate the air belt 12 through the inflation pipe 4, so that the sealing plug 1 is tightly attached to the inner wall of the pipe, completing the first seal and the pipe wall seal;

[0046] S4, drain the water in the pipeline. Under the action of water pressure, the sealing cover 2 and the end cover 3 at the end face of the pipeline are pressed tightly on the end face of the pipeline inlet and outlet, and cooperate with the rubber sealing plate 5 to further ensure the reliability of the seal, completing the second seal;

[0047] S5, when the water pump is overhauled or in other situations, when the sealing device needs to be removed, it is only necessary to deflate the air belt 12 to release the pressure, and then fill the pipeline with water. Under the action of the internal water pressure, the sealing plug 1 can be detached by itself.

[0048] The plug-type sealing device for replacing the inlet and outlet inspection valves of the pipeline as described above, when installed and used, one end of the sealing plug 1 is a hemispherical structure, and the other end is connected to a circular sealing cover 2; one side of the sealing cover 2 is connected to an end cover 3 by bolts; a sealing belt is provided on one side of the hemispherical shape of the sealing plug 1, which contacts and seals with the inner wall of the pipeline. The device adopts a hollow metal structure, and the head of the device is a spherical surface, so as to facilitate docking with the pipeline; the cross-section can be specially designed according to the shape of the pipeline inlet / outlet, and its overall specific gravity can be adjusted to be close to that of water, so as to facilitate mobile installation in the pool, and double sealing is achieved by using air pressure and water pressure. The structure is simple and reliable, easy to disassemble and carry, and has a good sealing effect.

[0049] When in use, the sealing plug 1 is a hollow metal structure; a first annular groove 11 is provided on the outer surface of one spherical end of the sealing plug 1. The hollow metal structure not only ensures the structural strength of the device, but also reduces the weight and material cost of the device. The specific gravity can be adjusted to be similar to that of water by changing the thickness of the outer shell to facilitate movement in water.

[0050] When in use, an air belt 12 is installed in the first groove 11. After being inflated, a circle of the air belt 12 can be closely attached to the inner wall of the pipeline to achieve a good sealing effect.

[0051] When in use, an inflation port 13 is provided on the air belt 12, one end of the inflation port 13 extends into the hollow sealing plug 1, and sealant is applied to the hole in the outer shell of the sealing plug 1 through which the inflation port 13 passes; the inflation tube 4 can be connected to the extended inflation port 13 by opening the end cover 3, and the operation is very convenient.

[0052] When in use, a through slot is opened on the sealing cover 2, and one end of the inflation tube 4 passes through the slot and extends into the hollow sealing plug 1 to cooperate with the inflation port 13; the other end of the inflation tube 4 is connected to external compressed air, and sealant is arranged in the slot. The inflation tube 4 and the inflation port 13 are independently separated, which is convenient for disassembly and storage of the device at a later time.

[0053] When in use, the diameter of the bottom surface of the sealing plug 1 is determined according to the inner diameter of the pipeline; the outer diameter of the sealing cover 2 is larger than the outer diameter of the pipeline, and the diameter of the device is adapted to the diameter of the pipeline, thereby improving the adaptability of the device.

[0054] When in use, a second annular groove 21 is provided on the surface of the sealing cover 2 that contacts the end face of the pipe; a rubber sealing plate 5 is installed in the second groove 21, and the rubber sealing plate 5 is aligned and in contact with the annular cross-section at the pipe port. When the sealing of the inflatable belt is completed, the water in the pipe is drained. At this time, due to the water pressure difference between the inside and outside, the rubber sealing plate 5 will be pressed against the pipe port by the water pressure, realizing "self-compression sealing", which further improves the sealing ability of the device.

[0055] The plug-type sealing device for replacing the pipeline inlet and outlet inspection valves comprises the following steps when used:

[0056] S1, assemble the sealing device, connect the inflation pipe 4 to the inflation port 13, tighten the end cover 3 with bolts, and then perform air tightness test and strength test;

[0057] S2, align one spherical end of the sealing plug 1 with the port of the pipeline to complete the docking, so that the rubber sealing plate 5 on the surface of the sealing plate is aligned with the end surface of the pipeline;

[0058] S3, inflate the air belt 12 through the inflation pipe 4, so that the sealing plug 1 is tightly attached to the inner wall of the pipe, completing the first seal and the pipe wall seal;

[0059] S4, drain the water in the pipeline. Under the action of water pressure, the sealing cover 2 and the end cover 3 at the end face of the pipeline are pressed tightly on the end face of the pipeline inlet and outlet, and cooperate with the rubber sealing plate 5 to further ensure the reliability of the seal, completing the second seal;

[0060] S5, when the water pump is overhauled or in other situations, when the sealing device needs to be removed, it is only necessary to deflate the air belt 12 to release the pressure, and then fill the pipeline with water. Under the action of the internal water pressure, the sealing plug 1 can be detached by itself.

[0061] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A plug-type sealing device replacing the pipeline inlet and outlet inspection valve, characterized in that: The invention comprises a sealing plug (1), one end of the sealing plug (1) is a hemispherical structure, and the other end is connected to a circular sealing cover (2); one side of the sealing cover (2) is connected to an end cover (3) by means of bolts; a sealing belt is provided on one side of the hemispherical shape of the sealing plug (1) to contact and seal with the inner wall of the pipeline; the sealing plug (1) is a hollow structure; an annular first groove (11) is provided on the outer surface of one end of the spherical surface of the sealing plug (1); an air belt (12) is arranged in the first groove (11); the air belt (12) 12) is provided with an inflation port (13), one end of the inflation port (13) extends into the interior of the hollow sealing plug (1), a through slot is provided on the sealing cover (2), one end of the inflation tube (4) passes through the slot and extends into the interior of the hollow sealing plug (1) to cooperate with the inflation port (13); the other end of the inflation tube (4) is connected to external compressed air; a second annular groove (21) is provided on the surface of the sealing cover (2) that contacts the end face of the pipeline; a rubber sealing plate (5) is installed in the second groove (21).

2. The plug-type sealing device for replacing pipeline inlet and outlet inspection valves according to claim 1 is characterized in that: The diameter of the bottom surface of the sealing plug (1) is determined according to the inner diameter of the pipeline; the outer diameter of the sealing cover (2) is greater than the outer diameter of the pipeline.

3. The method for using the plug-type sealing device as a replacement for the pipeline inlet and outlet inspection valve according to any one of claims 1 to 2, characterized in that: It includes the following steps: S1, assemble the sealing device, connect the inflation pipe (4) to the inflation port (13), tighten the end cover with bolts, and then perform air tightness test and strength test; S2, align one spherical end of the sealing plug (1) with the end of the pipe to complete the docking, so that the rubber sealing plate (5) on the surface of the sealing cover (2) is aligned with the end surface of the pipe; S3, inflating the air belt (12) through the inflation pipe (4) so ​​that the sealing plug (1) is tightly attached to the inner wall of the pipe, thus completing the first seal and the pipe wall seal; S4, draining the water in the pipeline. Under the action of water pressure, the sealing cover (2) and the end cover (3) at the end face of the pipeline are pressed tightly against the end face of the inlet and outlet of the pipeline, and cooperate with the rubber sealing plate (5) to further ensure the reliability of the seal, thus completing the second seal. S5, when the water pump is overhauled or in other situations, when the sealing device needs to be removed, it is only necessary to deflate the air belt (12) to release the pressure, and then fill the pipeline with water. Under the action of the internal water pressure, the sealing plug (1) can be detached by itself.

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