Multi-angle detection mechanism for underground pipeline

Abstract

The utility model relates to the field of underground pipeline detection, in particular to a multi-angle detection mechanism for an underground pipeline, which comprises a probe rod, a semiconductor gas sensor and the like. The probe rod is provided with a cavity I; and a semiconductor gas sensor is fixedly connected in the first cavity. On the premise that the hole opening of the detection hole is plugged by the plugging disc, the interior of the detection hole is pumped into a negative pressure state along with the repeated up-and-down movement of the piston in the second cavity, so that the speed of fuel gas diffusing into the detection hole through surrounding soil is increased; whether gas exists in air in the detection hole passing through the first cavity or not is detected through the semiconductor gas sensor at any time, and therefore the situation that due to the fact that a safe distance needs to be kept between the inner bottom of the drilled detection hole and a gas pipeline, when the gas leakage amount is small, gas is difficult to rapidly penetrate through surrounding soil to diffuse into the detection hole, and the gas leakage amount is small can be avoided. And the detection efficiency is influenced.

Description

Technical Field

[0001] This utility model relates to the field of underground pipeline detection, and in particular to a multi-angle detection mechanism for underground pipelines. Background Technology

[0002] In the current process of leak detection of underground gas pipelines, a vertically downward detection hole is usually drilled above the area of ​​the gas pipeline to be detected. Then, a gas detection rod is manually inserted into the bottom of the detection hole to detect whether there is a leak in the area of ​​the gas pipeline to be detected.

[0003] However, to ensure that the drill bit of the drilling equipment does not damage the gas pipeline, a safe distance must be maintained between the bottom of the drilled detection hole and the gas pipeline. Therefore, when the amount of gas leakage is small, the gas is difficult to quickly diffuse through the surrounding soil into the detection hole, thus affecting the detection efficiency. Utility Model Content

[0004] To overcome the drawback that when the gas leak is small, the gas cannot quickly diffuse through the surrounding soil into the detection hole because a safe distance must be maintained between the bottom of the drilled detection hole and the gas pipeline, thus affecting the detection efficiency, this utility model provides a multi-angle detection mechanism for underground pipelines.

[0005] The technical solution of this utility model is as follows: a multi-angle detection mechanism for underground pipelines, including a probe rod; it also includes a semiconductor gas sensor, an electric push rod, a long rod, a piston, and a sealing disc; the probe rod has a cavity one; the probe rod has a cavity two; the probe rod has at least one cavity three; the probe rod has a cavity four; cavity one has several air inlets; cavity one has a circular hole one, and the circular hole one communicates with cavity two; cavity two has through holes matching the number of cavities three, and the through holes communicate with cavity three; each cavity three has at least one air outlet; a semiconductor gas sensor is fixedly connected inside cavity one; an electric push rod is fixedly connected inside cavity four; the telescopic part of the electric push rod is fixedly connected to a long rod, and the long rod is slidably connected to the probe rod; a piston is slidably connected to cavity two, and the piston is fixedly connected to the long rod; the piston has several circular holes two; each circular hole one has an upward-opening one-way valve; each circular hole two has a downward-opening one-way valve; the probe rod is connected to a sealing disc for sealing the entrance of the detection hole.

[0006] As a preferred technical solution of this utility model, it also includes an annular sealing plate; the sealing disc is connected to an annular sealing plate for enhancing its sealing effect on the opening of the detection hole.

[0007] As a preferred technical solution of this utility model, it further includes an installation ring, a rotating frame, a connecting plate, and slotted teeth; the sealing disc is rotatably connected to the installation ring; the installation ring is fixedly connected to the rotating frame; the installation ring is fixedly connected to multiple connecting plates, and all connecting plates are fixedly connected to the annular sealing plate, and the annular sealing plate is rotatably connected to the sealing disc; the annular sealing plate is fixedly connected to several slotted teeth for making annular grooves around the opening of the detection hole, and the thickness of the slotted teeth is smaller than the thickness of the annular sealing plate.

[0008] As a preferred technical solution of this utility model, the rotating frame is provided with several handles.

[0009] As a preferred technical solution of this utility model, it also includes a connecting ball and a locking rod; the probe rod is connected to a damped sliding connection with a connecting ball for making it easier for the sealing plate to seal the entrance of the probe hole, and the connecting ball is rotatably connected to the sealing plate, and the connecting ball is fixedly connected with at least two locking rods, and the locking rods are in contact with the sealing plate.

[0010] As a preferred technical solution of this utility model, it also includes a plug, an installation rod, and filter cotton; the probe is screwed to the plug; the plug is fixed to the installation rod; the installation rod is detachably connected to the filter cotton, and the filter cotton is in contact with the inner wall of the cavity.

[0011] In the technical solution provided by this utility model: under the premise that the opening of the detection hole is sealed by the sealing plate, as the piston moves up and down repeatedly in the second cavity, the detection hole will be drawn into a negative pressure state to accelerate the speed at which the gas diffuses through the surrounding soil into the detection hole. At the same time, the presence of gas in the air passing through the first cavity is constantly detected by the semiconductor gas sensor. This avoids the problem that when the gas leakage is small, the gas cannot quickly diffuse through the surrounding soil into the detection hole because a safe distance must be maintained between the bottom of the drilled detection hole and the gas pipeline, thus affecting the detection efficiency.

[0012] By adding an annular sealing plate and inserting it into the soil, the sealing effect of the annular sealing plate on the entrance of the detection hole is enhanced, thus avoiding the problem that there is a gap between the sealing plate and the ground, which would make it difficult for the sealing plate to seal the entrance of the detection hole.

[0013] By adding an installation ring, a rotating frame, a connecting plate, and slotted teeth, the slotted teeth create annular grooves in the soil, allowing the annular sealing plate to be easily inserted into the soil. This avoids the problem of manual insertion of the annular sealing plate into the soil when the ground is hard.

[0014] By adding a connecting ball and a locking rod, the sealing disc can be adjusted at multiple angles by manipulating the handle, rotating frame, and mounting ring in sequence. This allows the sealing disc to be adjusted to the same tilt angle as the ground, thus avoiding the problem that the sealing disc cannot fully contact the ground when the ground is tilted, which would prevent the sealing disc from sealing the entrance of the detection hole. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the multi-angle detection mechanism for underground pipelines according to this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the sealing disc and annular sealing plate of the multi-angle detection mechanism for underground pipelines disclosed in this utility model.

[0017] Figure 3 This is a plan view of the internal structure of the probe rod of the multi-angle detection mechanism for underground pipelines of this utility model.

[0018] Figure 4 This is a schematic diagram of the probe rod, electric push rod, long rod, and piston of the multi-angle detection mechanism for underground pipelines disclosed in this utility model.

[0019] The diagram is labeled as follows: 1-Probe rod, 101-Cavity 1, 102-Cavity 2, 103-Cavity 3, 104-Cavity 4, 105-Air inlet, 106-Round hole 1, 107-Through hole, 108-Air outlet, 2-Semiconductor gas sensor, 3-Electric push rod, 4-Long rod, 5-Piston, 501-Round hole 2, 6-Sealing disc, 111-Annular sealing plate, 112-Mounting ring, 113-Rotating frame, 11301-Handle, 114-Connecting plate, 115-Slotted teeth, 121-Connecting ball, 122-Locking rod, 131-Plug, 132-Mounting rod, 133-Filter cotton. Detailed Implementation

[0020] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0021] Example 1

[0022] A multi-angle detection mechanism for underground pipelines, such as Figures 1-4 As shown, it includes probe 1;

[0023] It also includes a semiconductor gas sensor 2, an electric push rod 3, a long rod 4, a piston 5, and a sealing disc 6; the probe 1 has a cavity 101 on its lower side; a cavity 2 102 on its middle side; two cavities 3 103 distributed laterally on its upper side; a cavity 4 104 on its upper side, located between the two cavities 3 103; cavity 101 has several air inlets 105; cavity 101 has a circular hole 106, which communicates with cavity 2 102; cavity 2 102 has two through holes 107 distributed laterally, each of which communicates with the corresponding cavity 3 103; each cavity 3 103 has an air outlet 1. 08; A semiconductor gas sensor 2 for detecting the presence of gas in the air of the probe hole is bolted into cavity 101; an electric push rod 3 is bolted into cavity 4; a long rod 4 is fixedly connected to the telescopic part of the electric push rod 3, and the long rod 4 is slidably connected to the probe rod 1; a piston 5 for extracting air from the probe hole is slidably connected into cavity 2 102, and the piston 5 is fixedly connected to the long rod 4; the piston 5 has four circular holes 2 501; a one-way valve that opens upwards is provided in the circular hole 106; a one-way valve that opens downwards is provided in each circular hole 2 501; the probe rod 1 is connected to a sealing disc 6; the sealing disc 6 is provided with a battery for powering all electrically driven parts of this mechanism.

[0024] It also includes an annular sealing plate 111; the sealing disc 6 is connected to the annular sealing plate 111.

[0025] It also includes an installation ring 112, a rotating frame 113, a connecting plate 114, and slotted teeth 115; the sealing disc 6 is rotatably connected to the installation ring 112; the installation ring 112 is bolted to the rotating frame 113; the rotating frame 113 is provided with four handles 11301 for easier manual rotation; the installation ring 112 is fixedly connected to six connecting plates 114, and all connecting plates 114 are fixedly connected to the annular sealing plate 111, and the annular sealing plate 111 is rotatably connected to the sealing disc 6; the annular sealing plate 111 is fixedly connected to six slotted teeth 115, the thickness of the slotted teeth 115 being smaller than the thickness of the annular sealing plate 111.

[0026] It also includes a connecting ball 121 and a locking rod 122; the probe 1 is damped and slidably connected to the connecting ball 121, and the connecting ball 121 is rotatably connected to the sealing disc 6. The connecting ball 121 is bolted with two locking rods 122 for preventing the sealing disc 6 from rotating on it, and the locking rods 122 are in contact with the sealing disc 6.

[0027] It also includes a plug 131, an installation rod 132, and a filter cotton 133; the probe rod 1 is screwed to the plug 131; the plug 131 is fixed to the installation rod 132; the installation rod 132 is detachably connected to the filter cotton 133 for removing moisture from the air in the probe hole, and the filter cotton 133 is in contact with the inner wall of the cavity 101, and the filter cotton 133 is above the air inlet 105.

[0028] First, a vertically downward detection hole is drilled manually above the area of ​​the gas pipeline to be detected using a drilling machine. Then, probe 1 is inserted into the detection hole until its bottom contacts the bottom of the hole. Next, the sealing disc 6 is manually pushed downward until it contacts the ground, sealing the entrance of the detection hole. Then, the extension and retraction of the electric push rod 3 is controlled to repeatedly drive the piston 5 up and down within cavity 102 via the long rod 4. During this process, because a one-way valve that opens upward is installed in the first circular hole 106, while the second circular hole... A downward-opening one-way valve is installed inside 501. When piston 5 moves upward, the one-way valve in the second round hole 501 will remain blocked, while the one-way valve in the first round hole 106 will release its blockage. As piston 5 moves upward, it will sequentially draw air from the detection hole into the second cavity 102 through the first round hole 106, the first cavity 101, and the air inlet 105. Furthermore, as piston 5 moves upward, it will push the air in the second cavity 102 through the through hole 107 into the third cavity 103, and then through the outlet... When air flows out through vent 108, and piston 5 moves downward, the one-way valve inside orifice 2 501 releases its blockage, while the one-way valve inside orifice 1 106 remains blocked. As piston 5 moves downward, air in cavity 2 102 moves from below piston 5 to above it through orifice 2 501. Therefore, when piston 5 moves downward, it does not push the air drawn into cavity 2 102 back into the detection hole. Thus, with sealing plate 6 blocking the entrance to the detection hole... As piston 5 moves up and down repeatedly within cavity 102, the detection hole will be drawn into a negative pressure state to accelerate the diffusion of gas through the surrounding soil into the detection hole. At the same time, the semiconductor gas sensor 2 constantly detects whether there is gas in the air passing through cavity 101. This avoids the problem that when the gas leakage is small, the gas cannot quickly diffuse through the surrounding soil into the detection hole because a safe distance must be maintained between the bottom of the drilled detection hole and the gas pipe, thus affecting the detection efficiency.

[0029] Considering that when the ground is uneven, there will be a gap between the sealing plate 6 and the ground after the sealing plate 6 comes into contact with the ground, making it difficult for the sealing plate 6 to seal the entrance of the detection hole.

[0030] Therefore, an annular sealing plate 111 is added. After the sealing plate 6 is manually brought into contact with the ground, the annular sealing plate 111 will be inserted into the soil under the push of the sealing plate 6. In this way, the sealing effect of the annular sealing plate 111 on the opening of the detection hole is enhanced, so as to avoid the problem that there is a gap between the sealing plate 6 and the ground, which makes it difficult for the sealing plate 6 to seal the opening of the detection hole.

[0031] Considering that when the ground soil is hard, it is difficult for a person to push the annular sealing plate 111 into the ground soil using the sealing disc 6.

[0032] Therefore, an installation ring 112, a rotating frame 113, a connecting plate 114, and slotted teeth 115 are added. A handle 11301 is provided on the rotating frame 113. With this addition, instead of directly pushing the sealing disc 6, the operator can now push the sealing disc 6 downwards sequentially via the handle 11301, the rotating frame 113, and the installation ring 112. This makes it easier for the operator to push the sealing disc 6 downwards. As the sealing disc 6 moves downwards, once the slotted teeth 115 contact the ground, the operator continues to push the sealing disc 6 downwards, sequentially via the handle 11301, the rotating frame 113, and the installation ring 112. The ring 112, the sealing disc 6, and the annular sealing plate 111 drive the slotted teeth 115 to rotate. When the sealing disc 6 contacts the ground, the slotted teeth 115 will cut an annular groove in the soil, and the annular sealing plate 111 will be inserted into the annular groove. At this time, since the thickness of the slotted teeth 115 is smaller than the thickness of the annular sealing plate 111, the annular sealing plate 111 will be stably inserted into the annular groove. This allows the annular sealing plate 111 to be easily inserted into the soil, thus avoiding the problem that when the soil is hard, it is difficult for a person to push the annular sealing plate 111 into the soil through the sealing disc 6.

[0033] Considering that when the ground is tilted, the probe hole is vertically downward, and the probe rod 1 is inside the probe hole, the probe rod 1 is restricted by the probe hole and it is difficult to adjust the angle. That is, it is impossible to adjust the angle of the sealing plate 6 to the same tilt angle as the ground. Therefore, the sealing plate 6 is difficult to make complete contact with the ground, which leads to the sealing plate 6 being unable to seal the entrance of the probe hole.

[0034] Therefore, by adding a connecting ball 121 and a locking rod 122, and before the sealing disc 6 contacts the ground, the locking rod 122 is first manually unscrewed from the connecting ball 121 to release the locking rod 122 from the sealing disc 6, allowing the sealing disc 6 to rotate on the connecting ball 121. This allows the operator to sequentially rotate the sealing disc 6 on the connecting ball 121 via the handle 11301, the rotating frame 113, and the mounting ring 112, thus adjusting the tilt of the sealing disc 6 at multiple angles to achieve the same tilt angle as the ground. This avoids the problem that when the ground is tilted, the sealing disc 6 cannot fully contact the ground, which would prevent the sealing disc 6 from sealing the entrance of the detection hole.

[0035] Furthermore, during the process of the air in the detection hole passing through cavity 101, the air in the detection hole will first pass through filter cotton 133, and then come into contact with semiconductor gas sensor 2. In this way, the filter cotton 133 removes the moisture in the air in the detection hole to prevent the moisture in the air in the detection hole from affecting the sensitivity of semiconductor gas sensor 2.

[0036] When the filter cotton 133 needs to be replaced, the operator can first unscrew the plug 131 from the probe rod 1, and then take the filter cotton 133 out of the cavity 101 through the plug 131 and the mounting rod 132 in sequence. Then, the filter cotton 133 is removed from the mounting rod 132, and the new filter cotton 133 is installed on the mounting rod 132. Finally, the new plug 131, the mounting rod 132 and the new filter cotton 133 are reinstalled in the probe rod 1 to complete the quick replacement of the filter cotton 133.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multi-angle detection mechanism for underground pipelines, comprising a probe rod (1); characterized in that: It also includes a semiconductor gas sensor (2), an electric push rod (3), a long rod (4), a piston (5), and a sealing disc (6); the probe (1) is provided with a cavity one (101); the probe (1) is provided with a cavity two (102); the probe (1) is provided with at least one cavity three (103); the probe (1) is provided with a cavity four (104); the cavity one (101) has several air inlets (105); the cavity one (101) has a circular hole one (106), and the circular hole one (106) communicates with the cavity two (102); the cavity two (102) has through holes (107) matching the number of cavities three (103), and the through holes (107) communicate with the cavity three (103); each cavity Each cavity 3 (103) has at least one vent hole (108); a semiconductor gas sensor (2) is fixedly connected in cavity 1 (101); an electric push rod (3) is fixedly connected in cavity 4 (104); a long rod (4) is fixedly connected to the telescopic part of the electric push rod (3), and the long rod (4) is slidably connected to the probe rod (1); a piston (5) is slidably connected in cavity 2 (102), and the piston (5) is fixedly connected to the long rod (4); the piston (5) has several circular holes 2 (501); a one-way valve that opens upward is provided in the circular hole 1 (106); a one-way valve that opens downward is provided in each circular hole 2 (501); the probe rod (1) is connected to a sealing plate (6) for sealing the opening of the probe hole.

2. The multi-angle detection mechanism for underground pipelines according to claim 1, characterized in that: It also includes an annular sealing plate (111); the sealing disc (6) is connected to an annular sealing plate (111) for enhancing its sealing effect on the opening of the detection hole.

3. The multi-angle detection mechanism for underground pipelines according to claim 2, characterized in that: It also includes an installation ring (112), a rotating frame (113), a connecting plate (114), and slotted teeth (115); the sealing disc (6) is rotatably connected to the installation ring (112); the installation ring (112) is fixedly connected to the rotating frame (113); the installation ring (112) is fixedly connected to multiple connecting plates (114), and all connecting plates (114) are fixedly connected to the annular sealing plate (111), and the annular sealing plate (111) is rotatably connected to the sealing disc (6); the annular sealing plate (111) is fixedly connected to several slotted teeth (115) for making annular grooves around the opening of the detection hole, and the thickness of the slotted teeth (115) is smaller than the thickness of the annular sealing plate (111).

4. The multi-angle detection mechanism for underground pipelines according to claim 3, characterized in that: The rotating frame (113) is provided with several handles (11301).

5. A multi-angle detection mechanism for underground pipelines according to any one of claims 3-4, characterized in that: It also includes a connecting ball (121) and a locking rod (122); the probe (1) is damped and slidably connected to the connecting ball (121) for making it easier for the sealing plate (6) to seal the entrance of the probe hole, and the connecting ball (121) is rotatably connected to the sealing plate (6), the connecting ball (121) is fixedly connected to at least two locking rods (122), and the locking rods (122) are in contact with the sealing plate (6).

6. The multi-angle detection mechanism for underground pipelines according to claim 5, characterized in that: It also includes a plug (131), an installation rod (132) and a filter cotton (133); the probe (1) is screwed to the plug (131); the plug (131) is fixed to the installation rod (132); the installation rod (132) is detachably connected to the filter cotton (133), and the filter cotton (133) is in contact with the inner wall of cavity one (101).

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