A telescopic built-in filter fixing device

Abstract

The present invention belongs to a fixing device, and specifically relates to a telescopic built-in filter fixing device. A telescopic built-in filter fixing device, which includes an upper joint, an anchor claw seat, an anchor claw, an anchor claw pin, a sliding sleeve, and a lower joint, wherein the anchor claw seat is a barrel-shaped part, which is sleeved on the upper joint, the anchor claw seat is fixedly connected to the anchor claw through the anchor claw pin, the inner wall of the anchor claw seat is provided with a sliding sleeve, and the front end of the anchor claw is provided with a lower joint. The significant effect of the present invention is: the present application uses a mechanical device with a group of retractable pressure claws to fix the built-in filter, the retractable claw device is tubular, and is installed on the pipe column at the upper end of the built-in filter. When it is below the borehole, the pressure claw on the device is in a retracted state. After the built-in filter is lowered into place, the pressure claw on the device extends and is stuck on the variable diameter step with a larger bottom and a smaller top formed at the cutting part of the well pipe in the borehole, so that the filter is completely fixed in the hole. No matter how much water is pumped, the built-in filter does not move upward.

Description

Technical Field

[0001] The invention belongs to a fixing device, and in particular relates to a telescopic built-in filter fixing device. Background Art

[0002] In the in-situ leaching process, the built-in filter is fixed in the borehole. The existing technology is to install a rubber ring at the upper end of the built-in filter, relying on the friction between the rubber ring and the inner wall of the well pipe to prevent the built-in filter from floating up. The friction resistance of this rubber ring is limited. When the amount of water pumped in the borehole is large, the water flowing upward rapidly in the hole generates a large upward thrust on the built-in filter. When this thrust is greater than the friction between the built-in filter and the well pipe and the weight of the built-in filter, the built-in filter will move upward. At present, some in-situ leaching mines in China use this technology that relies on the friction of the rubber ring to fix the built-in filter. In actual use, the built-in filter often moves upward in the borehole and gets out of position. Summary of the invention

[0003] The present invention aims to overcome the defects of the prior art and provides a telescopic internal filter fixing device.

[0004] The present invention is implemented as follows: a telescopic built-in filter fixing device, which includes an upper joint, an anchor claw seat, an anchor claw, an anchor claw pin, a sliding sleeve, and a lower joint, wherein the anchor claw seat is a barrel-shaped part, which is sleeved on the upper joint, the anchor claw seat is fixedly connected to the anchor claw through the anchor claw pin, the inner wall of the anchor claw seat is provided with a sliding sleeve, and the front end of the anchor claw is provided with a lower joint.

[0005] In the telescopic internal filter fixing device as described above, the joint is a round tube with external threads at both ends, the diameter of the upper external threads is smaller than that of the lower external threads, and the middle of the external threads at both ends is a truncated cone with a larger diameter.

[0006] A telescopic internal filter fixing device as described above, wherein the anchor claw seat is a round tube with a large inner diameter at the upper end and a small inner diameter at the lower section, an internal thread at the upper end, and four round holes perpendicular to the axis of the anchor claw seat on the outer side of the lower end.

[0007] A telescopic internal filter fixing device as described above, wherein the anchor claw is a quadrangular prism with a rectangular cross section, a circular hole penetrating the opposite side is opened at the center line of the upper end side surface, and the circular hole is perpendicular to the two side surfaces; the upper end of the anchor claw is semicircular and the lower end is wedge-shaped.

[0008] In the telescopic internal filter fixing device as described above, the anchor claw pin is a small cylinder.

[0009] In the telescopic internal filter fixing device as described above, the sliding sleeve is a round tube with external threads at both ends.

[0010] In the telescopic internal filter fixing device as described above, the lower joint is a round pipe clamp with internal threads at both ends, and there is a step in the middle of the internal threads at both ends; the outer chamfer of the upper end of the lower joint is conical.

[0011] The remarkable effect of the present invention is that the present application uses a mechanical device with a group of retractable pressure claws to fix the built-in filter. The retractable claw device is tubular and is installed on the pipe column at the upper end of the built-in filter. When it is at the bottom of the borehole, the pressure claws on the device are in a retracted state. After the built-in filter is lowered into place, the pressure claws on the device extend out and get stuck on the diameter-changing steps with larger bottom and smaller top formed at the cutting part of the well pipe in the borehole, completely fixing the filter in the hole. No matter how much water is pumped, the built-in filter will not move upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Telescopic internal filter fixture diagram

[0013] Figure 2 Construction diagram of telescopic built-in filter fixing device

[0014] Among them, 1. upper joint, 2. anchor claw seat, 3. anchor claw, 4. anchor claw pin, 5. sliding sleeve, 6 nut, 7. lower joint, 9. built-in filter, 11. cutting step, 12. formation, 13. built-in filter fixing device, 14. built-in filter upper pipe, 15. drilling hole. DETAILED DESCRIPTION

[0015] A telescopic internal filter fixing device, wherein an upper joint 1 is a round tube with external threads at both ends, the diameter of the external threads at the upper end is smaller than that at the lower end, and the middle of the external threads at both ends is a truncated cone with a larger diameter.

[0016] The anchor claw seat 2 is a round tube with a large inner diameter at the upper end and a small inner diameter at the lower section, an internal thread is arranged at the upper end, and four circular holes perpendicular to the axis of the anchor claw seat 2 are arranged on the outer side of the lower end.

[0017] The anchor claw 3 is a quadrangular prism with a rectangular cross section. A circular hole penetrating the opposite side is opened at the center line of the upper side surface, and the circular hole is perpendicular to the two side surfaces. The upper end of the anchor claw 3 is semicircular, and the lower end is wedge-shaped.

[0018] The anchor pin 4 is a small cylinder.

[0019] The sliding sleeve 5 is a round tube with external threads at both ends.

[0020] The nut 6 is a round nut.

[0021] The lower joint 7 is a round pipe clamp with internal threads at both ends, and there is a step in the middle of the internal threads at both ends; the outer chamfer of the upper end of the lower joint 7 is a conical surface.

[0022] The telescopic built-in filter fixing device 13 for fixing the built-in filter pipe column of the borehole is connected to the built-in filter upper pipe 14 and the built-in filter 9 through threads to form the built-in filter pipe column. The built-in filter pipe column is installed in the borehole 15. During the lowering of the built-in filter pipe column into the borehole 15, the anchor claw 3 of the telescopic built-in filter fixing device 13 is vertically downward in a retracted state. When the built-in filter pipe column is lowered to the bottom of the borehole, the telescopic built-in filter fixing device 13 is just at the cutting step 11 in the borehole 15. At this time, the built-in filter upper pipe 14 is pressed down, and the anchor claw seat 2 will slide downward along the sliding sleeve 5. The anchor claw 3 hinged on the anchor claw seat 2 through the anchor claw pin 4 is also pushed to slide downward. At the same time, the anchor claw 3 is radially pushed by the conical surface of the lower joint 7 to open and clamp at the cutting step 11 in the borehole 15, and the built-in filter pipe column is fixed at the cutting step 11 in the borehole 15, so that the hydraulic force generated when the water in the formation 12 passes through the filter 9 and moves upward cannot push the built-in filter pipe column away from the cutting section position of the borehole 15.

Claims

1. A method for fixing a telescopic internal filter fixing device, characterized in that: The telescopic internal filter fixing device comprises: an upper joint (1), an anchor claw seat (2), an anchor claw (3), an anchor claw pin (4), a sliding sleeve (5) and a lower joint (7), wherein the anchor claw seat (2) is a barrel-shaped part, which is sleeved on the upper joint (1), the anchor claw seat (2) is fixedly connected to the anchor claw (3) through the anchor claw pin (4), the inner wall of the anchor claw seat (2) is provided with a sliding sleeve (5), and the front end of the anchor claw (3) is provided with a lower joint (7); The upper end of the anchor claw (3) is semicircular, and the lower end is wedge-shaped; The outer side of the upper end of the lower joint (7) is chamfered to form a conical surface; The fixing method comprises: a telescopic built-in filter fixing device (13) for fixing a built-in filter column in a borehole is connected to a built-in filter upper tube (14) and a built-in filter (9) respectively through threads to form a built-in filter column, and the built-in filter column is installed in a borehole (15). When the built-in filter column is lowered into the borehole (15), the anchor claw (3) of the telescopic built-in filter fixing device (13) is vertically contracted downward. When the built-in filter column is lowered to the bottom of the borehole, the telescopic built-in filter fixing device (13) is The filter fixing device (13) is just located at the cutting step (11) in the borehole (15). At this time, the upper tube (14) of the built-in filter is pressed downward, and the anchor claw seat (2) slides downward along the sliding sleeve (5). The anchor claw (3) hinged on the anchor claw seat (2) through the anchor claw pin (4) is also pushed to slide downward. At the same time, the anchor claw (3) is radially pushed by the conical surface of the lower joint (7) to open and clamp at the cutting step (11) in the borehole (15), thereby fixing the built-in filter column at the cutting step (11) in the borehole (15).

2. A method for fixing a telescopic internal filter fixing device according to claim 1, characterized in that: The joint (1) is a round tube with external threads at both ends, the diameter of the external threads at the upper end is smaller than the diameter of the external threads at the lower end, and the middle of the external threads at both ends is a truncated cone with a larger diameter.

3. A method for fixing a telescopic internal filter fixing device according to claim 2, characterized in that: The anchor claw seat (2) is a round tube with a large inner diameter at the upper end and a small inner diameter at the lower section, with an internal thread at the upper end and four round holes perpendicular to the axis of the anchor claw seat (2) at the outer side of the lower end.

4. A method for fixing a telescopic internal filter fixing device as claimed in claim 3, characterized in that: The anchor claw (3) is a quadrangular prism with a rectangular cross section. A circular hole penetrating the opposite side is opened at the center line of the upper side surface, and the circular hole is perpendicular to the two side surfaces.

5. A method for fixing a telescopic internal filter fixing device as claimed in claim 4, characterized in that: The anchor claw pin (4) is a small cylinder.

6. A method for fixing a telescopic internal filter fixing device as claimed in claim 5, characterized in that: The sliding sleeve (5) is a round tube with external threads at both ends.

7. A method for fixing a telescopic internal filter fixing device according to claim 6, characterized in that: The lower joint (7) is a round pipe clamp with internal threads at both ends, and a step is provided in the middle of the internal threads at both ends.

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