Detachable in-hole television probe centralizing device

Abstract

The invention discloses a detachable in-hole television probe centralizing device which comprises a television probe and centralizing elastic pieces, at least three centralizing elastic pieces are arranged on the side wall of the television probe in the circumferential direction, and each centralizing elastic piece is arranged in the axial direction of the television probe. The two ends of the centralizing elastic piece are connected with the side wall of the television probe, and the middle of the centralizing elastic piece protrudes in the direction away from the television probe. A plurality of centralizing elastic pieces are arranged on the periphery of the television probe at equal intervals, so that the television probe can be kept in the center of a drilled hole, it is guaranteed that the television probe and the hole wall are located at a proper distance, the imaging quality is guaranteed, and the television probe is prevented from colliding with the hole wall; the centralizing elastic piece can expand and move towards the two ends when the centralizing elastic piece passes through an obstacle and deforms greatly, and therefore the adaptability of the centralizing elastic piece to different hole diameters is improved.

Description

Technical Field

[0001] The invention relates to the technical field of drilling detection, in particular to a detachable in-hole television probe straightening device. Background Art

[0002] After the drilling construction is completed, when the inner wall of the borehole needs to be inspected, the TV probe in the hole is generally lowered into the borehole, and the probe is used to shoot the hole wall to form image data to detect the quality of the hole wall. By moving the probe, different positions of the borehole can be inspected. However, the diameter of the borehole is generally larger than the diameter of the TV probe. When the TV probe moves in the hole, it will stick to the hole wall, causing serious deformation of the picture on one side, and it is impossible to obtain accurate image data. In addition, during the movement, the TV probe may collide with the well wall, causing damage to the TV probe. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a detachable in-hole TV probe straightening device capable of keeping the TV probe centered in the borehole to improve the imaging quality.

[0004] In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a detachable in-hole TV probe straightening device, comprising a TV probe and a straightening spring sheet, at least three straightening spring sheets are arranged on the side wall of the TV probe in a circumferential direction, each of the straightening spring sheets is arranged along the axial direction of the TV probe, both ends of the straightening spring sheet are connected to the side wall of the TV probe, and the middle part of the straightening spring sheet protrudes in a direction away from the TV probe.

[0005] In the above-mentioned detachable in-hole TV probe straightening device, the straightening spring piece is in the shape of an arc, and the inner concave surface of the arc-shaped straightening spring piece is arranged toward the circumferential surface of the TV probe.

[0006] In the above-mentioned detachable in-hole TV probe straightening device, both ends of the straightening spring sheet are fixedly connected with connecting plates, and the connecting plates are fixedly connected to the side walls of the TV probe by screws.

[0007] In the above-mentioned detachable in-hole TV probe straightening device, a slide groove is provided on the connecting plate along its length direction, and one end of the screw passes through the slide groove and is threadedly connected to the side wall of the TV probe.

[0008] In the above-mentioned detachable in-hole TV probe straightening device, the screw is provided with a light rod portion whose length is greater than or equal to the thickness of the connecting plate, the light rod portion is connected to the head of the screw, and when the screw passes through the slide groove and presses the connecting plate, the light rod portion is located in the slide groove.

[0009] In the above-mentioned detachable in-hole TV probe straightening device, the straightening spring piece is provided with a mounting groove, a roller is rotatably mounted in the mounting groove, and the axis of the roller is perpendicular to the axis of the TV probe.

[0010] In the above-mentioned detachable in-hole TV probe straightening device, the installation groove is centrally arranged at the position where the straightening spring sheet is farthest from the TV probe, and the roller is rotatably installed in the middle of the installation groove.

[0011] In the above-mentioned detachable in-hole TV probe straightening device, in the circumferential direction of the TV probe: the rollers on adjacent straightening spring sheets are located on the same circumference.

[0012] The above-mentioned detachable in-hole TV probe straightening device has a sleeve coaxially sleeved on the TV probe, and the sleeve is rotatably fitted on the TV probe. A friction block is fixedly mounted on the sleeve, and the friction block is protruding from the surface of the sleeve, and the axial position of the friction block and the roller is the same, and the friction block and the roller are staggered in the circumferential direction. A driving motor is arranged in the TV probe, and the power output shaft of the driving motor is drivingly connected to the inner wall of the sleeve.

[0013] The above-mentioned detachable in-hole TV probe straightening device has an annular groove on the surface of the TV probe along its circumferential direction, and a limit ring is coaxially arranged on the inner wall surface of the sleeve, and the limit ring is slidably fitted in the annular groove; an annular tooth groove is opened on the inner wall surface of the sleeve along the circumferential direction, and an open groove is opened on the TV probe, and a driving gear is rotatably installed in the open groove through a rotating shaft, and the output shaft of the driving motor is meshed with one side of the driving gear through a transmission gear, and the other side of the driving gear is meshed with the annular tooth groove.

[0014] The technical solution of the present invention achieves the following beneficial technical effects:

[0015] 1. By setting a plurality of straightening springs at equal intervals around the TV probe, the TV probe can be kept in the center of the borehole, thereby ensuring that the TV probe is at a suitable distance from the hole wall, ensuring the imaging quality, and avoiding collision between the TV probe and the hole wall.

[0016] 2. By setting the slide groove and the screw, when the righting spring piece undergoes a large deformation when passing through an obstacle, the righting spring piece can expand and move to both ends, thereby improving the adaptability of the righting spring piece to different apertures.

[0017] 3. By setting the roller, it can contact with the hole wall to produce rolling, thereby reducing the movement resistance; since a mounting groove is opened at the position where the roller of the righting spring is installed, the material strength at the corresponding position of the righting spring is reduced, that is, the effective width of the righting spring on both sides of the mounting groove is reduced, which can provide more sensitive elasticity. When passing through uneven places, it can improve the stability of the TV probe and improve the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 A front view structural schematic diagram of the present invention;

[0020] Figure 3 A schematic structural diagram of the righting spring piece of the present invention;

[0021] Figure 4 A schematic diagram of the structure of the screw of the present invention;

[0022] Figure 5 A partial cross-sectional schematic diagram of the driving motor of the present invention installed in a television probe.

[0023] The reference numerals in the figure are as follows: 1-TV probe; 2-rightening spring; 3-connecting plate; 4-screw; 41-bare rod part; 5-mounting groove; 6-roller; 7-slide groove; 8-sleeve; 9-friction block; 10-limiting ring; 11-ring tooth groove; 12-driving motor; 13-driving gear; 14-opening groove. DETAILED DESCRIPTION

[0024] A detachable in-hole TV probe straightening device in this embodiment, such as Figure 1 As shown, it includes a TV probe 1 and a righting spring piece 2, at least three righting spring pieces 2 are arranged on the side wall of the TV probe 1 in the circumferential direction, each of the righting spring pieces 2 is arranged along the axial direction of the TV probe 1, both ends of the righting spring piece 2 are connected to the side wall of the TV probe 1, the middle part of the righting spring piece 2 protrudes in the direction away from the TV probe 1, the shape of the righting spring piece 2 is arc-shaped, the inner concave surface of the arc-shaped righting spring piece 2 is arranged toward the circumferential surface of the TV probe 1, and the righting spring piece 2 adopts a strip piece of equal width.

[0025] like Figure 1 , Figure 3As shown, connecting plates 3 are fixedly connected to both ends of the straightening spring piece 2, and the connecting plates 3 are fixedly connected to the side walls of the TV probe 1 through screws 4. A sliding groove 7 is opened on the connecting plate 3 along its length direction, and one end of the screw 4 passes through the sliding groove 7 and is threadedly connected to the side wall of the TV probe 1. The degree to which the screw 4 presses the connecting plate 3 is adjusted as needed. The greater the degree to which the screw 4 presses the connecting plate 3, the smaller the ability of the connecting plate 3 to expand outward, that is, the smaller the deformation.

[0026] like Figure 3 , Figure 4 As shown, the screw 4 is provided with a light rod portion 41 whose length is greater than or equal to the thickness of the connecting plate 3, and the light rod portion 41 is connected to the head of the screw 4. When the screw 4 passes through the slide groove 7 and presses the connecting plate 3, the light rod portion 41 is located in the slide groove 7.

[0027] like Figure 3 As shown, a mounting groove 5 is provided on the righting spring piece 2, and a roller 6 is rotatably installed in the mounting groove 5. The axis of the roller 6 is perpendicular to the axis of the TV probe 1. The mounting groove 5 is centrally provided at the position where the righting spring piece 2 is farthest from the TV probe 1. The roller 6 is rotatably installed in the middle of the mounting groove 5. In the circumferential direction of the TV probe 1, the rollers 6 on adjacent righting spring pieces 2 are located on the same circumference.

[0028] like Figure 1 , Figure 5 As shown, a sleeve 8 is coaxially sleeved on the TV probe 1, and the sleeve 8 is rotatably fitted on the TV probe 1. A friction block 9 is fixedly mounted on the sleeve 8, and the friction block 9 is arranged to protrude from the surface of the sleeve 8, and the friction block 9 has the same axial position as the roller 6, and the friction block 9 and the roller 6 are staggered in the circumferential direction. A driving motor 12 is arranged in the TV probe 1, and the power output shaft of the driving motor 12 is drivingly connected to the sleeve 8.

[0029] like Figure 5 As shown, an annular groove is provided on the surface of the TV probe 1 along its circumferential direction, and a limit ring 10 is coaxially arranged on the inner wall surface of the sleeve 8, and the limit ring 10 is slidably fitted in the annular groove; an annular tooth groove 11 is provided on the inner wall surface of the sleeve 8 along the circumferential direction, and an open groove 14 is provided on the TV probe 1, and a driving gear 13 is installed in the open groove 14 through a rotating shaft, the output shaft of the driving motor 12 is meshed with one side of the driving gear 13 through a transmission gear, and the other side of the driving gear 13 is meshed with the annular tooth groove 11, and the driving motor 12 drives the driving gear 13 to rotate through the transmission gear, so as to drive the sleeve 8 to rotate, so as to adjust the relative position of the friction block 9.

[0030] In the actual operation process, the drilling hole may have a certain curvature. When the front end of the TV probe 1 enters the arc-shaped drilling hole and the rear end of the TV probe 1 is still in the straight section, when the TV probe 1 is continuously pushed forward, the front end of the TV probe 1 will contact the inner wall of the arc-shaped drilling hole, generating a certain friction. The present invention adopts a friction block 9 that can adjust the position, rotates the friction block 9 to the corresponding roller 6 position, that is, the roller 6 located on one side of the inner bend of the arc-shaped drilling hole, so that the friction block 9 contacts the roller 6. The friction block 9 adopts an elastic rubber block. The corresponding roller 6 is hindered by the friction block 9, and the rotation resistance increases. Under the action of the rear driving force, the friction forces on both sides of the TV probe 1 are different, so that the TV probe 1 deflects along the bending direction of the arc-shaped drilling hole, avoiding the friction between the end of the TV probe 1 and the hole wall. In order to further improve the swing performance of the TV probe 1, the tail end of the TV probe 1 is connected to the rear push rod through an elastic rod, such as a rubber rod, which can ensure that the TV probe 1 can move within a certain range. Similarly, the above structural principle can also be used to avoid obstacles in the hole.

[0031] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A detachable in-hole TV probe straightening device, characterized in that: The invention comprises a television probe (1) and a righting spring sheet (2), wherein at least three righting spring sheets (2) are arranged on the side wall of the television probe (1) along the circumferential direction, each righting spring sheet (2) is arranged along the axial direction of the television probe (1), the two ends of the righting spring sheet (2) are connected to the side wall of the television probe (1), and the middle part of the righting spring sheet (2) protrudes in a direction away from the television probe (1).

2. A detachable in-hole TV probe straightening device according to claim 1, characterized in that: The shape of the righting spring piece (2) is arc-shaped, and the inner concave surface of the arc-shaped righting spring piece (2) is arranged toward the circumferential surface of the television probe (1).

3. The detachable in-hole TV probe straightening device according to claim 1, characterized in that: Both ends of the straightening spring sheet (2) are fixedly connected to connecting plates (3), and the connecting plates (3) are fixedly connected to the side wall of the television probe (1) via screws (4).

4. A detachable in-hole TV probe straightening device according to claim 3, characterized in that: The connecting plate (3) is provided with a sliding groove (7) along its length direction, and one end of the screw (4) passes through the sliding groove (7) and is threadedly connected to the side wall of the television probe (1).

5. A detachable in-hole TV probe straightening device according to claim 4, characterized in that: The screw (4) is provided with a light rod portion (41) whose length is greater than or equal to the thickness of the connecting plate (3); the light rod portion (41) is connected to the head of the screw (4); when the screw (4) passes through the slide groove (7) and presses the connecting plate (3), the light rod portion (41) is located in the slide groove (7).

6. A detachable in-hole TV probe straightening device according to any one of claims 1 to 5, characterized in that: The straightening spring sheet (2) is provided with a mounting groove (5), a roller (6) is rotatably mounted in the mounting groove (5), and the axis of the roller (6) is perpendicular to the axis of the television probe (1).

7. A detachable in-hole TV probe straightening device according to claim 6, characterized in that: The installation groove (5) is centrally arranged at a position where the distance between the straightening spring piece (2) and the television probe (1) is the farthest, and the roller (6) is rotatably installed in the middle of the installation groove (5).

8. The detachable in-hole TV probe straightening device according to claim 6, characterized in that: In the circumferential direction of the television probe (1), the rollers (6) on adjacent straightening spring pieces (2) are located on the same circumference.

9. The detachable in-hole TV probe straightening device according to claim 6, characterized in that: A sleeve (8) is coaxially sleeved on the television probe (1), and the sleeve (8) is rotatably fitted on the television probe (1). A friction block (9) is fixedly mounted on the sleeve (8), and the friction block (9) is arranged to protrude from the surface of the sleeve (8). The friction block (9) and the roller (6) have the same axial position, and the friction block (9) and the roller (6) are staggered in the circumferential direction. A driving motor (12) is arranged inside the television probe (1), and a power output shaft of the driving motor (12) is drivingly connected to the sleeve (8).

10. A detachable in-hole TV probe straightening device according to claim 9, characterized in that: An annular groove is provided on the surface of the television probe (1) along its circumferential direction, a limiting ring (10) is coaxially provided on the inner wall surface of the sleeve (8), and the limiting ring (10) is slidably fitted in the annular groove; an annular tooth groove (11) is provided on the inner wall surface of the sleeve (8) along the circumferential direction, an open groove (14) is provided on the television probe (1), a driving gear (13) is rotatably installed in the open groove (14) via a rotating shaft, the output shaft of the driving motor (12) is meshed with one side of the driving gear (13) via a transmission gear, and the other side of the driving gear (13) is meshed with the annular tooth groove (11).

Images