Natural gas long-distance pipeline safety pressure test device

Abstract

The utility model relates to the technical field of pipeline detection, in particular to a natural gas long-distance pipeline safety pressure testing device which comprises a bottom plate, a moving structure is arranged on the other side of the bottom plate, a supporting block is fixedly connected to the surface of the bottom plate, a pressing block is movably connected to the top of the supporting block, a threaded rod is rotationally connected to the interior of the pressing block, and a threaded rod is arranged on the threaded rod. A second limiting block is fixedly connected to the bottom of the threaded rod, a third limiting block is fixedly connected to the surface of the threaded rod, a nut is slidably connected to the surface of the threaded rod, and a hand-screwing knob is fixedly connected to the top of the threaded rod. The movable structure, the supporting block, the pressing block and the spring hasp are arranged, the pipeline body can be conveniently installed and fixed, use is convenient, the threaded rod, the second limiting block, the third limiting block, the nut and the hand-screwing knob are arranged, the pipeline body can be conveniently replaced, and continuous testing is more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline testing technology, specifically relating to a safety pressure testing device for long-distance natural gas pipelines. Background Technology

[0002] Natural gas pipelines are pipelines that transport natural gas from extraction sites or processing plants to urban gas distribution centers or industrial users. They are also known as gas transmission pipelines. Using natural gas pipelines to transport natural gas is a way to transport large quantities of natural gas on land. Before natural gas pipelines are used, they need to be pressure tested to ensure their sealing performance.

[0003] Pressure testing devices generate some shaking during pressure testing, requiring the pipeline to be fixed in position. However, existing pressure testing devices are inconvenient for fixing the pipeline, making them difficult to use during continuous testing. Therefore, we propose a safety pressure testing device for long-distance natural gas pipelines. Utility Model Content

[0004] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a safety pressure testing device for long-distance natural gas pipelines, so as to solve the problem that the pressure testing device mentioned in the background art will produce a certain amount of shaking during pressure testing, and the pipeline needs to be fixed in position. However, the existing pressure testing device is not convenient to fix the pipeline, and it is inconvenient to use during continuous testing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a safety pressure testing device for a long-distance natural gas pipeline, comprising a base plate, a groove on the surface of the base plate, a fixed plate fixedly connected to one side of the base plate, a connecting pipe fixedly connected to one side of the fixed plate, a connecting cylinder fixedly connected to the other side of the fixed plate, a movable structure on the other side of the base plate, the movable structure including a motor, a lead screw fixedly connected to the output end of the motor, a limit rod fixedly connected inside the groove, a slider slidably connected to the surfaces of the lead screw and the limit rod, a movable plate fixedly connected to the top of the slider, a sealing pipe fixedly connected to one side of the movable plate, a connecting cylinder fixedly connected to the other side of the movable plate, a pressure gauge fixedly connected to the surface of the sealing pipe, and a connecting plate fixedly connected to the surface of the base plate. A support block is provided, with a second sliding groove at each of the four bottom corners of the support block, a third sliding groove at the bottom of the support block, a pressure block movably connected to the top of the support block, a connecting rod fixedly connected to each of the four bottom corners of the pressure block, a first limiting block fixedly connected to the bottom of the connecting rod, a first spring abuttingly connected to the top of the first limiting block, a limiting groove inside the pressure block, a storage groove at the bottom of the pressure block, a threaded rod rotatably connected inside the pressure block, a second limiting block fixedly connected to the bottom of the threaded rod, a third limiting block fixedly connected to the surface of the threaded rod, a nut slidably connected to the surface of the threaded rod, a hand-tightening knob fixedly connected to the top of the threaded rod, spring latches fixedly provided on the surfaces of the support block and the pressure block, and a pipe body movably connected between the support block and the pressure block.

[0006] Preferably, the motor is electrically connected to an external power source.

[0007] Preferably, the surfaces of the support block and the pressure block are semi-circular, the inner sides of the first connecting cylinder and the second connecting cylinder are provided with sealing gaskets, the surfaces of the support block and the pressure block are provided with rubber gaskets, and the first connecting cylinder, the second connecting cylinder, the support block and the pressure block are at the same height.

[0008] Preferably, the limiting block one and the connecting rod are slidably connected in the slide groove two, the two ends of the spring one abut against the top of the limiting block one and the top of the inner wall of the slide groove two respectively, and the spring is sleeved on the outside of the connecting rod.

[0009] Preferably, the top of the slide groove three is provided with a threaded groove one that matches the threaded rod, the limiting block two is slidably connected in the slide groove three, the thread on the surface of the threaded rod is provided at the bottom of the threaded rod, and the thread length on the surface of the threaded rod is one-third of the length of the threaded rod.

[0010] Preferably, the limiting block three is rotatably connected in the limiting groove, the threaded rod passes through the storage groove and the limiting groove and is fixedly connected to the hand-tightening knob, and the radius of the limiting block three is greater than the radius of the threaded rod.

[0011] Preferably, the nut is slidably connected within the receiving groove, and the nut matches the thread on the surface of the threaded rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This safety pressure testing device for long-distance natural gas pipelines is equipped with a movable structure, a support block, a pressure block, and a spring latch. During testing, pulling up the pressure block moves the limiting block one upward via the connecting rod, thereby compressing the spring one and placing the pipeline body on the surface of the support block, so that one end of the pipeline body is inserted into the connecting cylinder one. After releasing the pressure block, the limiting block is pushed down by the spring one, thus pressing the pressure block onto the surface of the support block. The pipeline body is clamped by the support block and the pressure block, and the pressure block is fixed to the surface of the support block by the spring latch. The motor drives the lead screw to rotate, causing the slider to slide in the sliding groove one, thereby moving the movable plate to one side of the pipeline body, so that the other end of the pipeline body is inserted into the connecting cylinder two, pressing the pipeline body between the connecting cylinder one and the connecting cylinder two, which facilitates the installation and fixation of the pipeline body and is convenient to use.

[0014] 2. This safety pressure testing device for long-distance natural gas pipelines is equipped with a threaded rod, a second limiting block, a third limiting block, a nut, and a hand-tightening knob. Between the completion of one test and the start of the next test, the pressure block can be raised by turning the hand-tightening knob, so that the thread on the surface of the threaded rod contacts the first thread groove. Then, turning the hand-tightening knob causes the threaded rod to rotate within the first thread groove. As the hand-tightening knob rotates, the distance between the pressure block and the support block increases. When the second limiting block moves to the top of the third sliding groove and then moves to its maximum distance, the thread on the surface of the threaded rod is exposed from the top of the first thread groove. The position of the threaded rod can be fixed by the engagement of the nut with the thread on the surface of the threaded rod, thus separating the support block and the pressure block and preventing the pressure block from moving down under the action of gravity and the first spring. This facilitates the replacement of the pipeline body and makes continuous testing more convenient. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model in dynamic form;

[0017] Figure 3 This is an exploded view of the movable structure of this utility model;

[0018] Figure 4This is a front sectional view of the structure of the support block and the pressure block of this utility model;

[0019] Figure 5 This is an exploded sectional view of the support block and pressure block of this utility model.

[0020] In the diagram: 1. Base plate; 11. Slide groove one; 2. Fixed plate; 21. Connecting pipe; 22. Connecting cylinder one; 3. Moving structure; 31. Motor; 32. Lead screw; 33. Limiting rod; 34. Slider; 35. Moving plate; 36. Sealing pipe; 37. Pressure gauge; 38. Connecting cylinder two; 4. Support block; 41. Slide groove two; 42. Slide groove three; 5. Pressure block; 51. Connecting rod; 52. Limiting block one; 53. Spring one; 54. Limiting groove; 55. Storage groove; 56. Threaded rod; 57. Limiting block two; 58. Limiting block three; 59. Nut; 510. Hand-tightening knob; 6. Spring buckle; 7. Pipe body. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 One embodiment provided by this utility model:

[0023] A safety pressure testing device for a long-distance natural gas pipeline includes a base plate 1. A groove 11 is formed on the surface of the base plate 1. A fixed plate 2 is fixedly connected to one side of the base plate 1, and a connecting pipe 21 is fixedly connected to one side of the fixed plate 2. A connecting cylinder 22 is fixedly connected to the other side of the fixed plate 2. A movable structure 3 is provided on the other side of the base plate 1. The movable structure 3 includes a motor 31. A lead screw 32 is fixedly connected to the output end of the motor 31. A limit rod 33 is fixedly connected inside the groove 11. A slider 34 is slidably connected to the surfaces of the lead screw 32 and the limit rod 33. A movable plate 35 is fixedly connected to the top of the slider 34. A sealing pipe 36 is fixedly connected to one side of the movable plate 35, and a connecting cylinder 38 is fixedly connected to the other side of the movable plate 35. The surface of the sealing pipe 36... A pressure gauge 37 is fixedly connected to the surface of the base plate 1. A support block 4 is fixedly connected to the surface of the base plate 1. A second groove 41 is opened at the four corners of the bottom of the support block 4. A third groove 42 is opened at the bottom of the support block 4. A pressure block 5 is movably connected to the top of the support block 4. A connecting rod 51 is fixedly connected to the four corners of the bottom of the pressure block 5. A limit block 52 is fixedly connected to the bottom of the connecting rod 51. A spring 53 is abuttingly connected to the top of the limit block 52. A limit groove 54 is opened inside the pressure block 5. A storage groove 55 is opened at the bottom of the pressure block 5. A threaded rod 56 is rotatably connected inside the pressure block 5. A second limit block 57 is fixedly connected to the bottom of the threaded rod 56. A third limit block 58 is fixedly connected to the surface of the threaded rod 56. A nut 59 is slidably connected to the surface of the threaded rod 56. A hand-tightening knob 510 is fixedly connected to the top of the rod 56. Spring latches 6 are fixedly installed on the surfaces of the support block 4 and the pressure block 5. A pipe body 7 is movably connected between the support block 4 and the pressure block 5. The system includes a movable structure 3, support block 4, pressure block 5, and spring latches 6. During testing, pulling up the pressure block 5 causes the limiting block 52 to move upward via the connecting rod 51, thereby compressing the spring 53. This places the pipe body 7 on the surface of the support block 4, with one end of the pipe body 7 inserted into the connecting sleeve 22. Releasing the pressure block 5 pushes the limiting block 52 downward under the action of the spring 53, pressing the pressure block 5 onto the surface of the support block 4. The support block 4 and the pressure block 5 clamp the pipe body 7, while the spring latches 6 fix the pressure block 5 in place. The surface of the support block 4 is rotated by the motor 31 driving the lead screw 32 to rotate, causing the slider 34 to slide within the first groove 11. This, in turn, moves the moving plate 35 towards one side of the pipe body 7, allowing the other end of the pipe body 7 to be inserted into the second connecting cylinder 38. This secures the pipe body 7 between the first connecting cylinder 22 and the second connecting cylinder 38, facilitating the installation and fixation of the pipe body 7. The system is convenient to use. It includes a threaded rod 56, a second limiting block 57, a third limiting block 58, a nut 59, and a hand-tightening knob 510. Between the completion of one inspection and the start of the next, the pressure block 5 can be raised by turning the hand-tightening knob 510, causing the thread on the surface of the threaded rod 56 to contact the first thread groove. Then, turning the hand-tightening knob 510 allows the threaded rod 56 to rotate within the first thread groove.As the knob 510 is turned, the distance between the pressure block 5 and the support block 4 increases. When the limiting block 57 moves to the top of the sliding groove 42 and reaches its maximum distance, the thread on the surface of the threaded rod 56 protrudes from the top of the threaded groove. The position of the threaded rod 56 is fixed by the engagement of the nut 59 with the thread on the surface of the threaded rod 56, thus separating the support block 4 and the pressure block 5 and preventing the pressure block 5 from moving downward under the action of gravity and spring 53. This facilitates the replacement of the pipe body 7 and makes continuous testing more convenient.

[0024] Furthermore, the motor 31 is electrically connected to an external power source, which supplies power to the motor 31 and controls it uniformly.

[0025] Furthermore, the surfaces of the support block 4 and the pressure block 5 are both semi-circular. The inner sides of the connecting cylinder 1 22 and the connecting cylinder 2 38 are provided with sealing gaskets, and the surfaces of the support block 4 and the pressure block 5 are provided with rubber gaskets. The connecting cylinder 1 22, the connecting cylinder 2 38, the support block 4, and the pressure block 5 are at the same height. During the test, the pressure block 5 is pulled up, and the pipe body 7 is placed on the surface of the support block 4, so that one end of the pipe body 7 is inserted into the connecting cylinder 1 22. The pressure block 5 is pressed on the surface of the support block 4. The motor 31 drives the lead screw 32 to rotate, which drives the moving plate 35 to move to one side of the pipe body 7, so that the other end of the pipe body 7 is inserted into the connecting cylinder 2 38, and the pipe body 7 is pressed between the connecting cylinder 1 22 and the connecting cylinder 2 38. The connecting pipe 21 is connected to the air pump. One end of the sealing pipe 36 is connected to the connecting cylinder 2 38, and the other end is not connected to the outside. The pressure inside the pipe body 7 during the test can be observed through the pressure gauge 37.

[0026] Furthermore, the limiting block 52 and the connecting rod 51 are slidably connected in the slide groove 41. The two ends of the spring 53 abut against the top of the limiting block 52 and the top of the inner wall of the slide groove 41, respectively. The spring 53 is sleeved on the outside of the connecting rod 51. Pulling up the pressure block 5 causes the limiting block 52 to move upward through the connecting rod 51, thereby compressing the spring 53. After releasing the pressure block 5, the limiting block 52 is pushed downward under the action of the spring 53, thereby pressing the pressure block 5 onto the surface of the support block 4.

[0027] Furthermore, the top of the slide groove 3 42 is provided with a threaded groove 1 that matches the threaded rod 56. The limiting block 2 57 is slidably connected in the slide groove 3 42. The thread on the surface of the threaded rod 56 is set at the bottom of the threaded rod 56. The length of the thread on the surface of the threaded rod 56 is one-third of the length of the threaded rod 56. When the pressure block 5 is not subjected to external force, the limiting block 2 57 is at the bottom of the slide groove 3 42. At this time, the thread on the surface of the threaded rod 56 does not contact the threaded groove at the top of the slide groove 3 42. Pulling up the pressure block 5 causes the threaded rod 56 to move upward, and rotating the hand-tightening knob 510 can make the threaded rod 56 rotate into the threaded groove 1.

[0028] Furthermore, the limiting block 3 58 is rotatably connected in the limiting groove 54, and the threaded rod 56 passes through the receiving groove 55 and the limiting groove 54 and is fixedly connected to the hand-tightening knob 510. The radius of the limiting block 3 58 is larger than the radius of the threaded rod 56. Through the cooperation of the limiting block 3 58 and the limiting groove 54, the threaded rod 56 and the pressure block 5 can be regarded as a whole when the pressure block 5 is moved, and the threaded rod 56 can rotate independently relative to the pressure block 5.

[0029] Furthermore, the nut 59 is slidably connected in the storage groove 55. The nut 59 matches the thread on the surface of the threaded rod 56. After lifting the pressure block 5 and turning the hand-tightening knob 510 to rotate the threaded rod 56 to the maximum distance in the threaded groove, the nut 59 can be tightened on the upper surface of the support block 4 through the engagement of the nut 59 and the threaded rod 56, thereby fixing the position of the threaded rod 56 and fixing the distance between the adjusted support block 4 and the pressure block 5. When the pressure block 5 is pressed against the surface of the support block 4, the nut 59 can slide into the storage groove 55 without interfering with the contact between the pressure block 5 and the support block 4.

[0030] Working principle: During testing, pulling up the pressure block 5 causes the connecting rod 51 to move the limiting block 52 upward, compressing the spring 53 and placing the pipe body 7 on the surface of the support block 4. One end of the pipe body 7 is then inserted into the connecting cylinder 22. After releasing the pressure block 5, the spring 53 pushes the limiting block 52 downward, pressing the pressure block 5 onto the surface of the support block 4. The support block 4 and the pressure block 5 clamp the pipe body 7, while the spring latch 6 secures the pressure block 5 to the surface of the support block 4. The motor 31 drives the lead screw 32 to rotate, causing the slider 34 to slide within the slide groove 11. This, in turn, moves the moving plate 35 towards one side of the pipe body 7, inserting the other end of the pipe body 7 into the connecting cylinder 38. The pipe body 7 is then pressed between the connecting cylinder 22 and the connecting cylinder 38. An air pump connected to the connecting cylinder 22 then... Gas is introduced into the pipe body 7, and the pressure gauge 37 can observe the pressure inside the pipe body 7 during the test. Between the completion of one test and the start of the next test, the pressure block 5 can be raised by turning the knob 510, so that the thread on the surface of the threaded rod 56 contacts the thread groove. Then, turn the knob 510 to make the threaded rod 56 rotate in the thread groove. As the knob 510 is turned, the distance between the pressure block 5 and the support block 4 increases. When the limit block 2 57 moves to the top of the slide groove 3 42 and moves to the maximum distance, the thread on the surface of the threaded rod 56 is exposed from the top of the thread groove. The position of the threaded rod 56 can be fixed by the engagement of the nut 59 with the thread on the surface of the threaded rod 56, so that the support block 4 and the pressure block 5 are separated and the pressure block 5 will not move down under the action of gravity and spring 1 53, which makes it easier to replace the pipe body 7 and makes continuous testing more convenient.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A safety pressure testing device for long-distance natural gas pipelines, comprising a base plate (1), characterized in that: The surface of the base plate (1) is provided with a sliding groove (11). A fixing plate (2) is fixedly connected to one side of the base plate (1). A connecting pipe (21) is fixedly connected to one side of the fixing plate (2). A connecting cylinder (22) is fixedly connected to the other side of the fixing plate (2). A moving structure (3) is provided on the other side of the base plate (1). The moving structure (3) includes a motor (31). A lead screw (32) is fixedly connected to the output end of the motor (31). A limit rod (3) is fixedly connected inside the sliding groove (11). 3) A slider (34) is slidably connected to the surfaces of the lead screw (32) and the limiting rod (33). A moving plate (35) is fixedly connected to the top of the slider (34). A sealing tube (36) is fixedly connected to one side of the moving plate (35). A connecting cylinder (38) is fixedly connected to the other side of the moving plate (35). A pressure gauge (37) is fixedly connected to the surface of the sealing tube (36). A support block (4) is fixedly connected to the surface of the base plate (1). A sliding groove is provided at the four corners of the bottom of the support block (4). (41) The bottom of the support block (4) is provided with a sliding groove three (42), the top of the support block (4) is movably connected with a pressure block (5), the bottom four corners of the pressure block (5) are fixedly connected with connecting rods (51), the bottom of the connecting rods (51) is fixedly connected with a limiting block one (52), the top of the limiting block one (52) is abutted by a spring one (53), the inside of the pressure block (5) is provided with a limiting groove (54), the bottom of the pressure block (5) is provided with a storage groove (55), the inside of the pressure block (5) is provided with a storage groove (55). A threaded rod (56) is rotatably connected. A limit block two (57) is fixedly connected to the bottom of the threaded rod (56). A limit block three (58) is fixedly connected to the surface of the threaded rod (56). A nut (59) is slidably connected to the surface of the threaded rod (56). A hand-tightening knob (510) is fixedly connected to the top of the threaded rod (56). A spring buckle (6) is fixedly provided on the surface of the support block (4) and the pressure block (5). A pipe body (7) is movably connected between the support block (4) and the pressure block (5).

2. The safety pressure testing device for long-distance natural gas pipelines according to claim 1, characterized in that: The motor (31) is electrically connected to an external power source.

3. The safety pressure testing device for long-distance natural gas pipelines according to claim 1, characterized in that: The surfaces of the support block (4) and the pressure block (5) are semi-circular. The inner sides of the connecting cylinder one (22) and the connecting cylinder two (38) are provided with sealing gaskets. The surfaces of the support block (4) and the pressure block (5) are provided with rubber gaskets. The connecting cylinder one (22), the connecting cylinder two (38), the support block (4) and the pressure block (5) are at the same height.

4. The safety pressure testing device for long-distance natural gas pipelines according to claim 1, characterized in that: The limiting block (52) and the connecting rod (51) are slidably connected in the sliding groove (41). The two ends of the spring (53) abut against the top of the limiting block (52) and the top of the inner wall of the sliding groove (41) respectively. The spring (53) is sleeved on the outside of the connecting rod (51).

5. The safety pressure testing device for long-distance natural gas pipelines according to claim 1, characterized in that: The top of the slide groove three (42) is provided with a threaded groove one that matches the threaded rod (56). The limiting block two (57) is slidably connected in the slide groove three (42). The thread on the surface of the threaded rod (56) is set at the bottom of the threaded rod (56). The thread length on the surface of the threaded rod (56) is one-third of the length of the threaded rod (56).

6. The safety pressure testing device for long-distance natural gas pipelines according to claim 1, characterized in that: The limiting block three (58) is rotatably connected in the limiting groove (54), the threaded rod (56) passes through the storage groove (55) and the limiting groove (54) and is fixedly connected to the hand-tightening knob (510), and the radius of the limiting block three (58) is greater than the radius of the threaded rod (56).

7. The safety pressure testing device for long-distance natural gas pipelines according to claim 1, characterized in that: The nut (59) is slidably connected in the receiving groove (55), and the nut (59) matches the thread on the surface of the threaded rod (56).

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