Underground in-pipe cutting device

Abstract

The utility model relates to an in-pipe cutting device, in particular to an underground in-pipe cutting device. The utility model aims to solve the problem that the water pump and the water pipe cannot be taken out because the water pump in the well is blocked due to local collapse of the well wall or falling of foreign matters into the well bottom. The cutting device comprises a supporting frame, a feeding unit and a cutting unit, a power unit is installed on the supporting frame, and the feeding unit is arranged on an output shaft of the power unit in a sleeved mode. The cutting unit is small in size and compact in structure, all parts of the cutting unit are arranged in the shell, occupied space is reduced, the cutting unit can stretch into the water conveying pipe conveniently, the water conveying pipe is cut through cooperation of the power unit and the feeding unit, and the water conveying pipe can still be continuously used after being lifted out of a well after being cut; the problem that the water pump and the water pipe cannot be taken out due to the fact that the water pump is stuck in the well is solved, user cost is saved, and cutting efficiency is improved. The utility model belongs to the technical field of downhole operation tools.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe cutting device, particularly to a pipe cutting device for underground use, and belongs to the technical field of underground operation tools. BACKGROUND

[0002] When a water pump is replaced, the original water delivery pipe is usually continued to be used to save cost and installation efficiency, but during the maintenance process of a water well in rural or suburban areas, the well wall often collapses locally or foreign matter falls into the well bottom, causing the water pump to be stuck in the well, and thus the water pump and the water pipe cannot be taken out.

[0003] In view of the above technical problems, how to take out the original water delivery pipe in the well, which has become a problem to be solved by the technical personnel in the field. SUMMARY

[0004] The utility model provides a pipe cutting device for underground use in view of the defects of the prior art.

[0005] The technical scheme of the utility model is: a pipe cutting device for underground use, comprising a support frame, a feeding unit and a cutting unit.

[0006] The support frame is provided with a power unit, and the length of the support leg of the support frame can be adjusted; the feeding unit is sleeved on the output shaft of the power unit, and the feeding unit comprises a support seat, a fine adjustment sleeve and a sliding sleeve arranged coaxially.

[0007] The support seat is installed on the support frame, the fine adjustment sleeve is connected with the support seat through threads, the sliding sleeve is rotatably connected with the fine adjustment sleeve through a rolling bearing, and the sliding sleeve is slidably connected with the output shaft of the power unit through a sliding key.

[0008] The cutting unit comprises a housing, a first tension spring, a guide wedge, a check ring, a second tension spring, a lower end cover and two cutting knives.

[0009] The housing has a barrel structure, the housing is coaxially connected with the output shaft of the power unit through a plurality of joint extension rods, and the lower end cover is threadedly connected with the open end of the housing; a long slot is formed in the housing, the length direction of the long slot is parallel to the axis of the housing, and two guide sleeves are fixedly connected on the outer circumferential surface of the housing in a circumferential array, and the axes of the two guide sleeves are perpendicular to the axis of the housing.

[0010] The second tension spring, the guide wedge and the check ring are coaxially arranged in the housing, the check ring is arranged between the guide wedge and the lower end cover, and the check ring is threadedly connected with the housing; the guide wedge is slidably connected with the housing, the lower surface of the guide wedge abuts against the check ring, and the two ends of the second tension spring are connected with the guide wedge and the lower end cover respectively.

[0011] The guiding wedge is fixed with a sliding pin, the sliding pin is connected with the sliding sleeve through a steel cable after penetrating the long hole; a strip-shaped through hole is formed on the circumferential surface of the guiding wedge, and the length direction of the strip-shaped through hole is parallel to the axis of the guiding wedge.

[0012] The first tensile spring penetrates the strip-shaped through hole, and the two ends of the first tensile spring are respectively fixed with a cutting knife, the cutting knife is slidingly connected with the guiding sleeve, and the handle of the cutting knife abuts against the wedge surface of the guiding wedge.

[0013] Compared with the prior art, the utility model has the following effects:

[0014] The utility model discloses a cutting unit 300 is all arranged in the inside of the shell 310, reduces the space occupation, in order to facilitate the cutting unit 300 is inserted into the water delivery pipe 400, realizes the cutting of water delivery pipe 400 through the cooperation of power unit 110 and feed unit 200, can still continue to use after water delivery pipe 400 cutting is completed and is lifted to the outside of the well, avoids the problem that the water pump is stuck in the well and leads to the water pump and water pipe cannot be taken out, saves the cost of user simultaneously, improves the efficiency of cutting work. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic diagram of the utility model;

[0016] Figure 2 It is the sectional view of the utility model feed unit 200;

[0017] Figure 3 It is the axonometric drawing of the utility model support seat 220 and fine adjustment sleeve 230;

[0018] Figure 4 It is the axonometric drawing of the utility model cutting unit 300;

[0019] Figure 5 It is the axonometric drawing of the utility model cutting knife 330 and guiding wedge 340;

[0020] Figure 6 It is the sectional view of the utility model cutting unit 300;

[0021] Figure 7 It is Figure 6 The local enlarged view of the place II;

[0022] Figure 8 It is Figure 6 The local enlarged view of the place I;

[0023] Figure 9 It is the axonometric drawing of the utility model lengthening rod 120;

[0024] Figure 10 It is the schematic diagram when the utility model is used.

[0025] In the figure: 100, support frame; 110, power unit; 120, lengthening rod; 200, feeding unit; 210, rolling bearing; 220, support seat; 230, fine adjustment sleeve; 240, steel cable; 250, sliding sleeve; 300, cutting unit; 310, shell; 320, guide sleeve; 330, cutting knife; 331, first tension spring; 340, guide wedge; 341, sliding pin; 350, retaining ring; 360, second tension spring; 370, lower end cover; 380, rotating hanger; 400, water delivery pipe. DETAILED DESCRIPTION

[0026] In order to make the utility model of the utility model purposes, features, advantages can be more obvious and easy to understand, below will combine the drawings in the embodiment of the utility model, the technical scheme in the embodiment of the utility model is clearly and completely described.

[0027] Specific embodiment one: combine Figures 1 to 9 It is illustrated that the embodiment, a downhole pipe internal cutting device comprises a support frame 100, a feeding unit 200 and a cutting unit 300.

[0028] The power unit 110 is installed on the support frame 100, and the support leg length of the support frame 100 can be adjusted; the feeding unit 200 is sleeved on the output shaft of the power unit 110, and the feeding unit 200 comprises a support seat 220, a fine adjustment sleeve 230 and a sliding sleeve 250 arranged coaxially.

[0029] The support seat 220 is installed on the support frame 100, the fine adjustment sleeve 230 is connected with the support seat 220 through threads, the sliding sleeve 250 is rotatably connected with the fine adjustment sleeve 230 through the rolling bearing 210, and the sliding sleeve 250 is slidably connected with the output shaft of the power unit 110 through a sliding key.

[0030] The cutting unit 300 comprises a shell 310, a first tension spring 331, a guide wedge 340, a retaining ring 350, a second tension spring 360, a lower end cover 370 and two cutting knives 330.

[0031] The shell 310 is a barrel-shaped structure, the shell 310 is coaxially connected with the output shaft of the power unit 110 through a plurality of lengthening rods 120, and the lower end cover 370 is threadedly connected with the open end of the shell 310; a long hole is formed in the shell 310, the length direction of the long hole is parallel to the axis of the shell 310, and two guide sleeves 320 are fixedly connected on the outer circumferential surface of the shell 310 in a circumferential array, and the axes of the two guide sleeves 320 are perpendicular to the axis of the shell 310. The end face of the guide sleeve 320 is chamfered, so that the end face of the guide sleeve 320 does not scratch the inner wall of the water delivery pipe 400.

[0032] The second tension spring 360, the guide wedge 340 and the retaining ring 350 are coaxially arranged in the shell 310, the retaining ring 350 is arranged between the guide wedge 340 and the lower end cover 370, and the retaining ring 350 is threadedly connected with the shell 310; the guide wedge 340 is slidingly connected with the shell 310, the lower surface of the guide wedge 340 abuts against the retaining ring 350, and the two ends of the second tension spring 360 are connected with the guide wedge 340 and the lower end cover 370 respectively.

[0033] The guide wedge 340 is fixedly connected with a sliding pin 341, the axis of the sliding pin 341 is perpendicular to the axis of the guide wedge 340, the sliding pin 341 passes through the long hole and is connected with the sliding sleeve 250 through the steel cable 240; a strip-shaped through hole is formed in the circumferential surface of the guide wedge 340, and the length direction of the strip-shaped through hole is parallel to the axis of the guide wedge 340.

[0034] The first tension spring 331 penetrates through the strip-shaped through hole, and the two ends of the first tension spring 331 are fixedly connected with a cutting knife 330 respectively, the cutting knife 330 is slidingly connected with the guide sleeve 320, and the handle of the cutting knife 330 abuts against the wedge surface of the guide wedge 340.

[0035] In the embodiment, the principle that the feeding unit 200 adjusts the feeding amount is as follows:

[0036] The feeding unit 200 is sleeved on the output shaft of the power unit 110, the support seat 220 of the feeding unit 200 is installed on the support frame 100, the fine adjustment sleeve 230 is threadedly connected with the support seat 220, and the fine adjustment sleeve 230 can be lifted along the axis of the support seat 220 by screwing the fine adjustment sleeve 230; meanwhile, the sliding sleeve 250 is rotationally connected with the fine adjustment sleeve 230 through the rolling bearing 210.

[0037] A key groove is formed in the output shaft of the power unit 110, and a sliding key is installed on the sliding sleeve 250, so that the sliding sleeve 250 is slidingly connected with the output shaft of the power unit 110 through the sliding key. In this way, on the one hand, the fine adjustment sleeve 230 and the support seat 220 do not rotate with the output shaft of the power unit 110 when the output shaft rotates; on the other hand, the sliding sleeve 250 can slide along the length direction of the output shaft of the power unit 110, and the sliding sleeve 250 can also rotate with the output shaft of the power unit 110, so that the sliding sleeve 250 and the power unit 110 rotate synchronously, and the steel cable 240 can pull the sliding pin 341.

[0038] In the embodiment, the guide wedge 340 includes two symmetrical wedge surfaces, the two wedge surfaces are arranged at 90° with the strip-shaped through hole, and a sliding groove is formed in each of the two wedge surfaces, and the width of the sliding groove is the same as the width of the handle of the cutting knife 330.

[0039] Further, the width of the sliding groove is greater than the width of the strip-shaped through hole.

[0040] Specific implementation two: combined Figure 1 , Figure 2 and Figure 3 This embodiment is described, in which the fine adjustment sleeve 230 comprises a first shaft section and a second shaft section.

[0041] The first shaft section is a tubular structure, and the first shaft section is connected to the support base 220 by a threaded connection.

[0042] The second shaft section is a hexagonal prism structure, which facilitates the rotation of the fine adjustment sleeve 230.

[0043] Further, a stepped through hole is coaxially formed in the second shaft section, which facilitates the axial positioning of the rolling bearing 210.

[0044] The other components and connection relationships are the same as in specific implementation one.

[0045] Specific implementation three: combined Figure 6 and Figure 7 This embodiment is described, in which one end of the second tension spring 360 is fixedly connected to the lower surface of the guide wedge 340, and the other end of the second tension spring 360 is rotatably connected to the lower end cover 370.

[0046] Further, the second tension spring 360 is rotatably connected to the lower end cover 370 through the rotating ring 380.

[0047] The other components and connection relationships are the same as in specific implementation one or two.

[0048] Specific implementation four: combined Figure 1 , Figure 2 , Figure 6 and Figure 9 This embodiment is described, in which the rolling bearing 210 is a deep groove ball bearing.

[0049] Further, the power unit 110 is a reduction motor.

[0050] Further, the output shaft and the housing 310 of the power unit 110 are both bayonet connected to the extension rod 120.

[0051] The other components and connection relationships are the same as in specific implementation one, two, or three.

[0052] Working principle

[0053] During pipe cutting operations, the following steps are followed:

[0054] Step one, install the extension rod 120 on the cutting unit 300 section by section, and at the same time, extend the cutting unit 300 into the water conveying pipe 400 until the cutting unit 300 reaches the bottom end of the water conveying pipe 400.

[0055] Step two, support frame 100 is arranged above the wellhead, adjust the support leg to keep the support frame 100 horizontal, the output shaft of the power unit 110 is connected with the extension rod 120.

[0056] Step three, tighten the cable 240, and then connect the cable 240 with the sliding sleeve 250.

[0057] Step four, start the power unit 110, the power unit 110 drives the cutting unit 300 to rotate through the extension rod 120, then rotates the fine adjustment sleeve 230, so that the fine adjustment sleeve 230 rises along the axis of the support base 220, and then the cutting knife 330 gradually cuts the water pipe 400, after the water pipe 400 is cut off and taken out of the well, a new water pump is replaced and put into the well bottom.

[0058] The cutting principle of the cutting unit 300 is as follows:

[0059] The outer circumferential surface of the shell 310 is fixedly connected with two guide sleeves 320, the axes of the two guide sleeves 320 are perpendicular to the axis of the shell 310, the cutting knife 330 is slidingly connected with the guide sleeve 320, and the handle of the cutting knife 330 abuts against the wedge surface of the guide wedge 340.

[0060] Further, the guide wedge 340 is slidingly connected with the shell 310, the guide wedge 340 is fixedly connected with a sliding pin 341, the sliding pin 341 passes through the long hole and is connected with the sliding sleeve 250 through the cable 240, so that when the sliding pin 341 is pulled upward by the cable 240, the guide wedge 340 also slides upward in the shell 310, and then the two cutting knives 330 move away from each other until the cutting edges abut against the inner wall of the water pipe 400, and with the continuous feeding of the cutting knives 330, the water pipe 400 is cut.

[0061] In addition, the two ends of the first tension spring 331 are fixedly connected with one cutting knife 330 respectively, and the two ends of the second tension spring 360 are connected with the guide wedge 340 and the lower end cover 370 respectively, when the water pipe 400 is cut off, the power unit 110 is stopped, then the fine adjustment sleeve 230 is rotated, so that the fine adjustment sleeve 230 descends along the axis of the support base 220, under the action of the tension of the second tension spring 360, the guide wedge 340 slides downward in the shell 310, and then the two cutting knives 330 move close to each other under the action of the tension of the first tension spring 331, until they are retracted into the guide sleeve 320, so as to avoid scratching the inner wall of the water pipe 400.

[0062] The utility model has disclosed the above with preferable implementation, however is not used to limit the utility model, any familiar professional technical personnel, does not depart from the content of the utility model technical scheme, according to the technical essence of the utility model to the above implementation case of any simple modification, equivalent change and modification, still belong to the utility model technical scheme range.

Claims

1. An in-hole cutting device for a well, characterized in that: it comprises a support frame (100), a feeding unit (200) and a cutting unit (300); the support frame (100) is provided with a power unit (110), and the leg length of the support frame (100) is adjustable; the feeding unit (200) is sleeved on the output shaft of the power unit (110), and the feeding unit (200) comprises coaxially arranged support seat (220), fine adjustment sleeve (230) and sliding sleeve (250); the support seat (220) is mounted on the support frame (100), the fine adjustment sleeve (230) is connected with the support seat (220) through threads, the sliding sleeve (250) is rotationally connected with the fine adjustment sleeve (230) through a rolling bearing (210), and the sliding sleeve (250) is slidingly connected with the output shaft of the power unit (110) through a sliding key; the cutting unit (300) comprises a shell (310), a first tension spring (331), a guide wedge (340), a check ring (350), a second tension spring (360), a lower end cover (370) and two cutting knives (330); the shell (310) is in a barrel structure, the shell (310) is coaxially connected with the output shaft of the power unit (110) through a plurality of joint extension rods (120), and the lower end cover (370) is threadedly connected with the open end of the shell (310); a long slot is formed in the shell (310), the length direction of the long slot is parallel to the axis of the shell (310), and two guide sleeves (320) are fixedly connected on the outer circumferential surface of the shell (310) in a circumferential array, and the axes of the two guide sleeves (320) are perpendicular to the axis of the shell (310); the second tension spring (360), the guide wedge (340) and the check ring (350) are coaxially arranged in the shell (310), the check ring (350) is arranged between the guide wedge (340) and the lower end cover (370), and the check ring (350) is threadedly connected with the shell (310); the guide wedge (340) is slidingly connected with the shell (310), the lower surface of the guide wedge (340) abuts against the check ring (350), and the two ends of the second tension spring (360) are connected with the guide wedge (340) and the lower end cover (370) respectively; a sliding pin (341) is fixedly connected on the guide wedge (340), the sliding pin (341) passes through the long slot and is connected with the sliding sleeve (250) through a steel cable (240); a strip-shaped through hole is formed in the circumferential surface of the guide wedge (340), and the length direction of the strip-shaped through hole is parallel to the axis of the guide wedge (340); the first tension spring (331) penetrates through the strip-shaped through hole, and the two ends of the first tension spring (331) are fixedly connected with one cutting knife (330) respectively; the cutting knife (330) is slidingly connected with the guide sleeve (320), and the handle of the cutting knife (330) abuts against the wedge surface of the guide wedge (340). The fine adjustment sleeve (230) comprises a first shaft section and a second shaft section; the first shaft section is in a tubular structure, and the first shaft section is threadedly connected with the support seat (220); and the second shaft section is in a hexagonal prism structure, and a stepped through hole is coaxially formed in the second shaft section. ​ ​ ​ ​ ​ ​ ​ ​ 2. A downhole in-line cutting device according to claim 1, characterized in that: ​ ​ ​ 3. A downhole in-line cutting device according to claim 1, characterized in that: One end of the second tension spring (360) is fixedly connected with the lower surface of the guide wedge (340), and the other end of the second tension spring (360) is rotatably connected with the lower end cover (370).

4. A downhole in-line cutting device according to claim 3, characterised in that: The second tension spring (360) is rotatably connected with the lower end cover (370) through the rotating ring (380).

5. A downhole in-line cutting device according to claim 1, characterized in that: The axis of the sliding pin (341) is perpendicular to the axis of the guide wedge (340).

6. A downhole in-line cutting device according to claim 5, characterised in that: A sliding groove is formed on the wedge surface of the guide wedge (340), and the width of the sliding groove is the same as the width of the handle of the cutting knife (330).

7. A downhole in-line cutting device according to claim 6, characterised in that: The width of the sliding groove is greater than the width of the strip-shaped through hole.

8. A downhole in-line cutting device according to claim 1, characterized in that: The rolling bearing (210) is a deep groove ball bearing.

9. A downhole in-line cutting device according to claim 1, characterized in that: The power unit (110) is a speed reduction motor.

10. A downhole in-line cutting device according to claim 1, characterized in that: The output shaft of the power unit (110), the shell (310) and the lengthened rod (120) are all connected through a bayonet joint.

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