A natural gas pipeline protection device in tunnel excavation

Abstract

The application provides a natural gas pipeline protection device in tunnel excavation. The natural gas pipeline protection device in tunnel excavation comprises a pipeline, a protection mechanism, a mounting mechanism, a fixing mechanism, a limiting mechanism, a welding mechanism and a plugging mechanism. The protection mechanism comprises an upper cover plate, a lower cover plate and a fixing strip. The fixing mechanism comprises a ball, a fixing plate, a support plate and a screw rod. The top end of the mounting mechanism is rotationally connected with the support plate. The inner part of the support plate with an arc-shaped side wall is threadedly connected with the screw rod. The bottom end of the screw rod is clamped and rotationally connected with the fixing plate. The bottom end of the fixing plate is equidistantly and rollingly connected with the ball. The ball is slidingly connected with the side wall of the pipeline and the upper cover plate. The limiting mechanism is installed at the connection between the mounting mechanism and the support plate. The welding mechanism is used for welding the pipeline and the protection mechanism. The plugging mechanism is used for plugging the pipeline. The natural gas pipeline protection device in tunnel excavation has the advantages of convenient installation and reduced labor quantity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of natural gas pipeline protection, and particularly relates to a natural gas pipeline protection device in tunnel excavation. BACKGROUND

[0002] In the tunnel construction process, the natural gas pipeline inside the construction range needs to be protected, the soil around the pipeline is removed and dug out, the pipeline is exposed, the pipeline is monitored at all times during the construction process to avoid pipeline damage, and when the tunnel construction is completed, the natural gas pipeline in the construction range needs to be protected by a 2cm thick steel pipe to prevent the tunnel from being blown open from the top in case of natural gas leakage and explosion, and to ensure the operation safety of the tunnel after the railway is opened to traffic.

[0003] When the steel pipe is used to protect the natural gas pipeline, two half-ring steel plates are used to wrap the natural gas pipeline, and then the connection part of the two steel plates is welded, but during the installation process, the soil layer around the natural gas pipeline is cleaned, but the distance between the natural gas pipeline and the soil layer is close, and it is difficult to install the steel plate at the bottom end of the natural gas pipeline, which is inconvenient for people to install.

[0004] Therefore, it is necessary to provide a new natural gas pipeline protection device in tunnel excavation to solve the above technical problems. SUMMARY

[0005] The technical problem solved by the present application is to provide a natural gas pipeline protection device in tunnel excavation which is convenient to install and reduces the labor of people.

[0006] In order to solve the above technical problems, the present invention provides a natural gas pipeline protection device for tunnel excavation, comprising a pipeline; a protection mechanism, the protection mechanism is wrapped around the side wall of the pipeline, the protection mechanism comprises an upper cover plate, a lower cover plate and a fixing strip, the bottom end of the pipeline is installed with the lower cover plate, and the top end of the pipeline is installed with the upper cover plate; the inner side walls of the upper cover plate and the lower cover plate are equidistantly installed with the fixing strips with a semicircular cross-section, and the fixing strips are slidably connected to the side walls of the pipeline; the mounting mechanism is equidistantly installed at the bottom end of the lower cover plate; the fixing mechanism is rotatably connected to the mounting mechanism, and the fixing mechanism The cam is connected to the support plate by a threaded connection, and the bottom end of the screw is engaged with and connected to the fixed plate, and the bottom end of the fixed plate is equidistantly and rollingly connected to the ball, and the ball is slidably connected to the side wall of the pipe and the upper cover plate; a limiting mechanism is installed at the connection between the mounting mechanism and the support plate; a welding mechanism is fixed at the connection between the upper cover plate and the lower cover plate; and a blocking mechanism is in contact with one end of the upper cover plate and the lower cover plate.

[0007] Preferably, the mounting mechanism includes a mounting rod, a support rod, a support ring and a connecting rod. The mounting rod is equidistantly mounted on the bottom end of the lower cover plate, and the interior of the mounting rod is threadedly connected to the support rod; one end of the support rod is engaged and rotatably connected to the support ring, the top end of the support ring is fixedly connected to the connecting rod, and the top end of the connecting rod is rotatably connected to the support plate.

[0008] Preferably, the limiting mechanism includes a second limiting plate, a limiting rod and a fixed block, the top end of the connecting rod is vertically fixedly connected to the second limiting plate, and the inside of the second limiting plate is threadedly connected to the limiting rod; the bottom end of the support plate is installed with the hemispherical fixed block, and the fixed block is slidably connected to the side wall of the limiting rod.

[0009] Preferably, the welding mechanism includes a first limiting plate and a welding strip, the top end of the lower cover plate is symmetrically installed with the first limiting plate having an "L"-shaped cross-section, the bottom end of the upper cover plate is symmetrically installed with the welding strip having an arc-shaped side wall, and the inside of the first limiting plate is engaged with the welding strip.

[0010] Preferably, the sealing mechanism includes a feed pipe, a first fixing ring, a second fixing ring and a protrusion, one end of the lower cover plate is engaged with the second fixing ring, and one end of the upper cover plate is engaged with the first fixing ring; the first fixing ring and the second fixing ring are engaged, and the side wall of the second fixing ring is symmetrical to the first limiting plate, and the feed pipe is installed on the top of the first fixing ring; the hemispherical protrusions are equidistantly installed at one end of the upper cover plate and the lower cover plate, and the protrusions contact the first fixing ring or the second fixing ring.

[0011] Preferably, the inner cross-sections of the first fixing ring and the second fixing ring are T-shaped, and the inner diameters of the first fixing ring and the second fixing ring are equal to the diameters of the upper cover plate and the lower cover plate.

[0012] Preferably, the upper cover plate and the lower cover plate are both hollow semi-cylindrical structures, and the lower cover plate is slidably connected to the side wall of the pipe.

[0013] Compared with related technologies, the natural gas pipeline protection device during tunnel excavation provided by the present invention has the following beneficial effects:

[0014] The present invention provides a natural gas pipeline protection device during tunnel excavation, when the tunnel construction structure is completed, the installation mechanism is installed at the bottom end of the lower cover plate, so that the fixing mechanism is fixed to one side of the lower cover plate, the lower cover plate is lifted by a crane so that the lower cover plate covers the top side wall of the pipeline, the support plate is rotated on the side wall of the installation mechanism so that one end of the support plate is rotated into the bottom end of the pipeline, the screw is rotated, and the screw rotates inside the fixing plate and pushes the fixing plate toward the pipeline so that the ball at one end of the fixing plate is tightly against the bottom side wall of the pipeline, the limiting mechanism is used to engage the other end of the supporting plate to prevent the supporting plate from rotating on the side wall of the installation mechanism, so that the ball is tightly against the bottom end of the pipeline, the fixing bar inside the lower cover plate is tightly against the top side wall of the pipeline, and the supporting plate is pulled so that the supporting plate The support plate pulls the lower cover plate to rotate, and the lower cover plate rotates on the side wall of the pipe, so that the lower cover plate is quickly rotated from the top end of the pipe to the bottom end of the pipe, bricks are placed between the soil layer and the lower cover plate, and the lower cover plate is fixed to the side wall of the pipe, and the support plate is rotated to separate the ball bearings from the side wall of the pipe, and the upper cover plate is covered on the top end of the pipe by a crane, so that the upper cover plate covers the top end of the pipe, and the welding mechanism is aligned. After the upper cover plate is fixed, the support plate is rotated so that the support plate is located at the top side wall of the upper cover plate, and the screw is rotated so that the ball bearings are close to the top side wall of the upper cover plate, thereby fixing the upper cover plate and the lower cover plate to the side wall of the pipe, and using a welding machine to weld the side wall of the welding mechanism, thereby fixing the upper cover plate and the lower cover plate together, and the gap between the upper cover plate and the lower cover plate is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of the natural gas pipeline protection device during tunnel excavation provided by the present invention;

[0016] Figure 2 for Figure 1 A top view of the internal structure of the protection mechanism shown;

[0017] Figure 3 for Figure 2 An enlarged schematic diagram of the structure at point A is shown;

[0018] Figure 4 for Figure 1 Schematic diagram of the internal structure of the pipeline is shown.

[0019] Numbers in the figure: 1. pipeline, 2. fixing mechanism, 21. ball bearing, 22. fixing plate, 23. support plate, 24. screw, 3. protection mechanism, 31. upper cover plate, 32. lower cover plate, 33. fixing bar, 4. blocking mechanism, 41. feed pipe, 42. first fixing ring, 43. second fixing ring, 44. bump, 5. welding mechanism, 51. first limiting plate, 52. welding bar, 6. limiting mechanism, 61. second limiting plate, 62. limiting rod, 63. fixing block, 7. mounting mechanism, 71. mounting rod, 72. support rod, 73. support ring, 74. connecting rod. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 in, Figure 1 A schematic diagram of the structure of the natural gas pipeline protection device during tunnel excavation provided by the present invention; Figure 2 for Figure 1 A top view of the internal structure of the protection mechanism shown; Figure 3 for Figure 2 An enlarged schematic diagram of the structure at point A is shown; Figure 4 for Figure 1The schematic diagram of the internal structure of the pipeline is shown. The natural gas pipeline protection device in tunnel excavation includes: a pipeline 1; a protection mechanism 3, the protection mechanism 3 is wrapped around the side wall of the pipeline 1, the protection mechanism 3 includes an upper cover plate 31, a lower cover plate 32 and a fixing bar 33, the bottom end of the pipeline 1 is installed with the lower cover plate 32, and the top end of the pipeline 1 is installed with the upper cover plate 31; the inner side walls of the upper cover plate 31 and the lower cover plate 32 are equidistantly installed with the fixing bars 33 with a semicircular cross-section, and the fixing bars 33 are slidably connected to the side walls of the pipeline 1; the mounting mechanism 7 is equidistantly mounted on the bottom end of the lower cover plate 32; the fixing mechanism 2, the fixing mechanism 2 is rotatably connected to the mounting mechanism 7, and the fixing mechanism 2 includes a ball 21, a fixing plate 22, The support plate 23 and the screw 24, the top end of the mounting mechanism 7 is rotatably connected to the support plate 23, and the inner part of the support plate 23 with an arc-shaped side wall is threadedly connected to the screw 24; the bottom end of the screw 24 is engaged and rotatably connected to the fixed plate 22, and the bottom end of the fixed plate 22 is equidistantly rolling connected to the ball 21, and the ball 21 is slidingly connected to the side wall of the pipe 1 and the upper cover plate 31; the limiting mechanism 6, the limiting mechanism 6 is installed at the connection between the mounting mechanism 7 and the support plate 23; the welding mechanism 5, the welding mechanism 5 is fixed at the connection between the upper cover plate 31 and the lower cover plate 32; the blocking mechanism 4, the blocking mechanism 4 contacts one end of the upper cover plate 31 and the lower cover plate 32.

[0022] When the locking cam 73 is in the unlocking state, the locking cam 73 is locked and the locking cam 73 is in the unlocking state, so that the winch 23 can be unlocked and the winch 23 can be unlocked.

[0023] Specifically, the limiting mechanism 6 includes a second limiting plate 61, a limiting rod 62 and a fixed block 63. The top end of the connecting rod 74 is vertically fixedly connected to the second limiting plate 61, and the interior of the second limiting plate 61 is threadedly connected to the limiting rod 62; the bottom end of the support plate 23 is installed with the hemispherical fixed block 63, and the fixed block 63 is slidably connected to the side wall of the limiting rod 62. In order to facilitate the rotation of the limiting rod 62, the limiting rod 62 is rotated and raised on the side wall of the second limiting plate 61, so that the limiting rod 62 contacts the fixed block 63, thereby fixing the support plate 23 and preventing the support plate 23 from continuing to rotate.

[0024] Specifically, the welding mechanism 5 includes a first limiting plate 51 and a welding rod 52. The top end of the lower cover plate 32 is symmetrically installed with the first limiting plate 51 having an "L"-shaped cross-section, and the bottom end of the upper cover plate 31 is symmetrically installed with the welding rod 52 having an arc-shaped side wall. The interior of the first limiting plate 51 is engaged with the welding rod 52. In order to facilitate the contact between the upper cover plate 31 and the lower cover plate 32, the upper cover plate 31 drives the welding rod 52 to enter the interior of the first limiting plate 51, and a welding machine is used to weld the welding rod 52 to the first limiting plate 51, that is, the upper cover plate 31 and the lower cover plate 32 are fixed together, and the gap between the upper cover plate 31 and the lower cover plate 32 is sealed to prevent natural gas from leaking from the gap between the upper cover plate 31 and the lower cover plate 32.

[0025] Specifically, the blocking mechanism 4 includes a feed pipe 41, a first fixing ring 42, a second fixing ring 43 and a protrusion 44, one end of the lower cover plate 32 is engaged with the second fixing ring 43, and one end of the upper cover plate 31 is engaged with the first fixing ring 42; the first fixing ring 42 and the second fixing ring 43 are engaged, and the side wall of the second fixing ring 43 contacts the first limit plate 51, and the top end of the first fixing ring 42 is installed with the feed pipe 41; the hemispherical protrusions 44 are equidistantly installed at one end of the upper cover plate 31 and the lower cover plate 32, and the protrusions 44 contact the first fixing ring 42 or the second fixing ring 43. When the two protective mechanisms 3 are spliced, the two upper cover plates 31 contact each other, and the two lower cover plates 32 contact each other. A welding machine is used to weld the connection between the two upper cover plates 31, and the gap between the two upper cover plates 31 is closed, and the two upper cover plates 31 are fixed together, and then the two lower cover plates are The connection between the side walls of the two lower cover plates 32 is welded. When the connection between the lowest ends of the two lower cover plates 32 is difficult to weld due to the obstruction of the soil layer, the second fixing ring 43 is used to engage the two lower cover plates 32. The second fixing ring 43 covers the connection between the two lower cover plates 32, and the protrusion 44 on the side wall of the lower cover plate 32 contacts the second fixing ring 43. The second fixing ring 43 is fixed to the connection between the two lower cover plates 32, and sealant is injected into the interior of the second fixing ring 43. The sealant seals the connection between the lower cover plates 32. After the sealant inside the second fixing ring 43 dries, the first fixing ring 42 is used to engage the second fixing ring 43 with the first fixing ring 42, and the sealant is injected into the interior of the feed pipe 41. The sealant fills the interior of the first fixing ring 42, and the connection between the two upper cover plates 31 is sealed again. After the sealant dries, the stability of the two protection mechanisms 3 after connection is increased.

[0026] Specifically, the internal cross-sections of the first fixing ring 42 and the second fixing ring 43 are "T"-shaped, and the inner diameters of the first fixing ring 42 and the second fixing ring 43 are equal to the diameters of the upper cover plate 31 and the lower cover plate 32. In order to facilitate the first fixing ring 42 to be close to the side wall of the upper cover plate 31, the second fixing ring 43 is close to the inside of the lower cover plate 32, and it is convenient to inject sealant into the inside of the first fixing ring 42 and the second fixing ring 43, so as to facilitate sealing the connection between the second fixing ring 43 and the first fixing ring 42.

[0027] Specifically, the upper cover plate 31 and the lower cover plate 32 are both hollow semi-cylindrical structures, and the lower cover plate 32 is slidably connected to the side wall of the pipe 1. In order to facilitate the rotation of the lower cover plate 32, the bottom end of the pipe 1 is wrapped to protect the bottom end side wall of the pipe 1.

[0028] The working principle of the natural gas pipeline protection device during tunnel excavation provided by the present invention is as follows: During tunnel construction, it is necessary to protect the natural gas pipeline within the construction area. The soil around the pipeline is removed and excavated to prevent leakage from the pipeline. The pipeline is constantly monitored during construction to prevent damage to the pipeline. When tunnel construction is completed, the support rod 72 is rotated so that the support rod 72 rotates into the interior of the installation rod 71, and the support rod 72 rotates on the inner side wall of the support ring 73. When the support rod 72 rotates into the interior of the installation rod 71, the support ring 73 and the connecting rod 74 do not rotate, causing the support plate 23 to slowly approach the lower cover plate 32 and fix the support plate 23 to the upper cover plate 31. Use a crane to lift the lower cover plate 32 so that the lower cover plate 32 covers the top side wall of the pipe 1, rotate the support plate 23 at one end of the connecting rod 74 so that one end of the support plate 23 rotates into the bottom end of the pipe 1, rotate the screw 24, and the screw 24 rotates inside the fixing plate 22, while pushing the fixing plate 22 toward the bottom end of the pipe 1, so that the ball 21 at one end of the fixing plate 22 is close to the bottom side wall of the pipe 1, rotate the limiting rod 62 so that the limiting rod 62 rotates and rises on the side wall of the second limiting plate 61, so that the limiting rod 62 contacts the fixing block 63, thereby fixing the support plate 23 and preventing the support plate 23 from continuing to rotate, so that the ball bearing 21 is in close contact with the bottom end of the pipe 1. The fixing bar 33 inside the upper cover plate 31 is in close contact with the top side wall of the pipe 1. Pulling the support plate 23 causes the support plate 23 to pull the lower cover plate 32 to rotate. The lower cover plate 32 rotates on the side wall of the pipe 1, causing the lower cover plate 32 to quickly rotate from the top end of the pipe 1 to the bottom end of the pipe 1. Bricks are placed between the soil layer and the lower cover plate 32 to fix the lower cover plate 32 to the side wall of the pipe 1. The limiting rod 62 is rotated to move the limiting rod 62 downward and separate from the fixing block 63. The screw 24 is rotated to drive the fixing plate 22 upward and separate from the pipe 1. The support plate 23 is rotated to separate the support plate 23 from the side wall of the pipe 1. Then use a crane to cover the upper cover plate 31 on the top of the pipe 1 so that the upper cover plate 31 covers the top of the pipe 1. When the upper cover plate 31 contacts the lower cover plate 32, the upper cover plate 31 drives the welding rod 52 into the interior of the first limiting plate 51.After the upper cover plate 31 is fixed, the support plate 23 is rotated so that the support plate 23 is located at the top side wall of the upper cover plate 31, the screw 24 is rotated to make the ball 21 close to the top side wall of the upper cover plate 31, and the limiting rod 62 is rotated to fix the support plate 23, thereby fixing the upper cover plate 31 and the lower cover plate 32 to the side wall of the pipeline 1, and using a welding machine to weld the welding rod 52 and the first limiting plate 51, that is, fixing the upper cover plate 31 and the lower cover plate 32 together, and sealing the gap between the upper cover plate 31 and the lower cover plate 32 to prevent natural gas from leaking from the gap between the upper cover plate 31 and the lower cover plate 32; during the welding process, the fixing mechanism 2 firmly fixes the upper cover plate 31 and the lower cover plate 32 together, making it convenient for people to weld. At the same time, multiple protection mechanisms 3 are installed on the side wall of the pipeline 1. After two protection mechanisms 3 are spliced, the protection mechanisms 3 are slid. The cross-section of the fixing strip 33 inside the protection mechanism 3 is semicircular, which facilitates the sliding of the protection mechanism 3 on the side wall of the pipeline 1. The protection mechanism 3 is slid so that the two upper cover plates 31 and the two lower cover plates 32 are in conflict with each other. A welding machine is used to weld the connection between the two upper cover plates 31, and the gap between the two upper cover plates 31 is closed. The two upper cover plates 31 are fixed together, and then the connection between the side walls of the two lower cover plates 32 is welded. Since the connection at the lowest end of the two lower cover plates 32 is difficult to weld due to the obstruction of the soil layer, the second fixing ring 43 is used to clamp the two The lower cover plate 32, the second fixing ring 43 covers the connection between the two lower cover plates 32, and the protrusion 44 on the side wall of the lower cover plate 32 contacts the second fixing ring 43, and the second fixing ring 43 is fixed to the connection between the two lower cover plates 32, and the sealant is injected into the interior of the second fixing ring 43, and the sealant seals the connection between the lower cover plates 32. After the sealant inside the second fixing ring 43 is dried, the first fixing ring 42 is used to make the second fixing ring 43 engage with the first fixing ring 42, and the sealant is injected into the interior of the feeding pipe 41 to fill the interior of the first fixing ring 42 with the sealant, and the connection between the two upper cover plates 31 is sealed again. After the sealant is dried, the stability of the two protection mechanisms 3 after connection is increased.

[0029] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A natural gas pipeline protection device for tunnel excavation, characterized in that: include: pipeline; A protective mechanism wrapped around the side wall of the pipe, comprising an upper cover plate, a lower cover plate, and a fixing strip, wherein the lower cover plate is mounted on the bottom end of the pipe and the upper cover plate is mounted on the top end of the pipe; fixing strips having a semicircular cross-section are equidistantly mounted on the inner side walls of the upper cover plate and the lower cover plate, and the fixing strips are slidably connected to the side wall of the pipe; A mounting mechanism, the mounting mechanism being equidistantly mounted on the bottom end of the lower cover plate; A fixing mechanism, the fixing mechanism is rotatably connected to the mounting mechanism, the fixing mechanism includes a ball, a fixing plate, a support plate and a screw, the top of the mounting mechanism is rotatably connected to the support plate, the interior of the support plate with an arc-shaped side wall is threadedly connected to the screw; the bottom end of the screw is engaged and rotatably connected to the fixing plate, the bottom end of the fixing plate is equidistantly rollingly connected to the ball, and the ball is slidably connected to the pipe and the side wall of the upper cover plate; A limiting mechanism, the limiting mechanism being installed at the connection between the mounting mechanism and the support plate; a welding mechanism, the welding mechanism being fixed at a connection between the upper cover plate and the lower cover plate; a blocking mechanism, the blocking mechanism abutting against one end of the upper cover plate and the lower cover plate; The mounting mechanism includes a mounting rod, a support rod, a support ring and a connecting rod. The mounting rod is equidistantly mounted on the bottom end of the lower cover plate, and the interior of the mounting rod is threadedly connected to the support rod; one end of the support rod is engaged and rotatably connected to the support ring, the top end of the support ring is fixedly connected to the connecting rod, and the top end of the connecting rod is rotatably connected to the support plate.

2. The natural gas pipeline protection device during tunnel excavation according to claim 1, characterized in that: The limiting mechanism includes a second limiting plate, a limiting rod and a fixed block. The top end of the connecting rod is vertically fixedly connected to the second limiting plate, and the inside of the second limiting plate is threadedly connected to the limiting rod; the bottom end of the support plate is installed with the hemispherical fixed block, and the fixed block is slidably connected to the side wall of the limiting rod.

3. The natural gas pipeline protection device during tunnel excavation according to claim 1, characterized in that: The welding mechanism includes a first limiting plate and a welding strip. The top end of the lower cover plate is symmetrically mounted with the first limiting plate having an L-shaped cross-section, and the bottom end of the upper cover plate is symmetrically mounted with the welding strip having an arc-shaped side wall. The welding strip is engaged with the interior of the first limiting plate.

4. The natural gas pipeline protection device during tunnel excavation according to claim 3, characterized in that: The sealing mechanism includes a feed pipe, a first fixing ring, a second fixing ring and a protrusion. One end of the lower cover plate is engaged with the second fixing ring, and one end of the upper cover plate is engaged with the first fixing ring. The first fixing ring and the second fixing ring are engaged, and the side wall of the second fixing ring contacts the first limit plate. The feed pipe is installed on the top of the first fixing ring. The hemispherical protrusions are equidistantly installed at one end of the upper cover plate and the lower cover plate, and the protrusion contacts the first fixing ring or the second fixing ring.

5. The natural gas pipeline protection device during tunnel excavation according to claim 4, characterized in that: The inner cross-sections of the first fixing ring and the second fixing ring are T-shaped, and the inner diameters of the first fixing ring and the second fixing ring are equal to the diameters of the upper cover plate and the lower cover plate.

6. The natural gas pipeline protection device during tunnel excavation according to claim 1, characterized in that: The upper cover plate and the lower cover plate are both hollow semi-cylindrical structures, and the lower cover plate is slidably connected to the side wall of the pipeline.

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