Sucker rod hot stretching straightening device

Abstract

The utility model provides a sucker rod hot stretching straightening device which comprises a rack, a hydraulic cylinder is fixed to one end of the rack, a sliding block is fixed to the end of a piston rod of the hydraulic cylinder, and clamping structures used for clamping the end of a sucker rod are fixed to one end of the sliding block and the other end of the rack correspondingly. Two symmetrically-distributed cylindrical rods are fixed to the upper portion of the rack, the cylindrical rods penetrate through the sliding block and are connected with the sliding block in a sliding mode, one cylindrical rod is provided with a limiting switch capable of controlling the contraction stroke of the hydraulic cylinder, and the limiting switch can move in the axial direction of the cylindrical rod and be locked. The sliding block can touch the limiting switch after moving towards one end of the machine frame. According to the invention, while the straightness of the rod body or the rod head does not exceed the standard, the macroscopic bending phenomenon of the rod body and the rod head and the local necking problem can be eliminated.

Description

Technical Field

[0001] The present application relates to a sucker rod production technology, and in particular to a sucker rod hot stretching and straightening device. Background Art

[0002] The sucker rod is a slender rod of the pumping well. It is connected to the polished rod at the top and the oil pump at the bottom to transmit power. The straightness of the sucker rod is 304.8mm, the maximum allowable single-side clearance in the middle of the gauge is 1.6mm, and the maximum allowable runout of the end straightness is 3.30mm.

[0003] At present, the hot stretching straightening of the sucker rod after heat treatment and tempering is controlled by setting the stretching pressure and holding time of the oil cylinder to control the straightness of the rod body. However, since the stretching pressure and holding time of the oil cylinder are fixed when stretching and straightening the sucker rods of the same diameter, and the diameter error and straightness error of each sucker rod are different, the displacement of each sucker rod is different under the same stretching pressure and holding time, resulting in insufficient stretching displacement of some sucker rods. After the sucker rods after hot stretching are completely cooled, the rod bodies or rod heads of these sucker rods still have straightness. Although they do not exceed the standard, there is a visible bending phenomenon. If the stretching pressure is too large, the sucker rod will have a local necking problem, and it is difficult to find the necking position of the locally necked sucker rods during the packaging inspection process, which leads to the risk of quality hazards in the sucker rods after stretching and straightening. Utility Model Content

[0004] The present application provides a sucker rod heat stretching and straightening device, which is used to solve the problem that after the sucker rods are stretched and straightened in the existing sucker rod heat stretching and straightening method, some sucker rods have visible bending on the rod body or rod head, and the sucker rods will have local necking.

[0005] The present application provides a sucker rod hot stretching and straightening device, comprising a frame, a hydraulic cylinder is fixed at one end of the frame, a slider is fixed at the end of the piston rod of the hydraulic cylinder, a clamping structure for clamping the end of the sucker rod is fixed at one end of the slider and the other end of the frame, two symmetrically distributed cylindrical rods are fixed at the upper part of the frame, and the cylindrical rods penetrate the slider and are slidably connected to the slider;

[0006] A limit switch capable of controlling the retraction stroke of the hydraulic cylinder is disposed on one of the cylindrical rods, and the limit switch can be moved and locked along the axial direction of the cylindrical rod;

[0007] The slide block can touch the limit switch after moving toward one end of the frame.

[0008] Optionally, a mounting seat is sleeved on one of the cylindrical rods, the mounting seat can move axially along the cylindrical rod and be locked, and the limit switch is mounted on the mounting seat.

[0009] Optionally, a side end of one of the cylindrical rods is provided with a notch distributed along its axial direction, the mounting seat is provided with a through hole adapted to the notch position of the cylindrical rod, and the notch position of the cylindrical rod passes through the through hole and is slidably connected to the through hole.

[0010] Optionally, a locking bolt capable of pressing the cylindrical rod is threadedly connected to the mounting seat.

[0011] Optionally, a scale distributed along the axial direction of the cylindrical rod is fixed on the slider, the scale is located in the notch, and the scale passes through the mounting seat and is slidably connected to the mounting seat.

[0012] Optionally, the zero scale line of the scale coincides with an end of the slider close to the hydraulic cylinder.

[0013] Optionally, the limit switch adopts a direct-acting travel switch;

[0014] Wherein, after the push rod of the direct-acting travel switch contacts its contact, one end of the push rod overlaps with one end of the mounting seat.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The sucker rod hot stretching and straightening device provided by the present application is characterized in that a limit switch capable of controlling the retraction stroke of the hydraulic cylinder is provided on one of the cylindrical rods, and the limit switch can move and be locked along the axial direction of the cylindrical rod, and the slider can touch the limit switch after moving toward one end of the frame, so that when in use, the limit switch controls the retraction stroke of the hydraulic rod, that is, it can control the displacement amount of the hydraulic cylinder stretching the sucker rod. When hot stretching and straightening the sucker rods of the same diameter, the stretching and straightening effect of the sucker rod can be ensured by controlling the displacement amount of the stretched sucker rod, thereby ensuring that the straightness of the rod body or the rod head does not exceed the standard and eliminating the visible bending of the rod body and the rod head and the local necking problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the main structure of a sucker rod hot stretching and straightening device provided in an embodiment of the present application;

[0019] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of region A;

[0020] Figure 3 A schematic diagram of the top view of the structure of the sucker rod hot stretching and straightening device provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of a partial top view of the structure of a sucker rod hot stretching and straightening device provided in an embodiment of the present application;

[0022] Figure 5 A schematic diagram of a partial side cross-sectional structure of a sucker rod hot stretching and straightening device provided in an embodiment of the present application;

[0023] Figure 6 A schematic diagram of the partial three-dimensional structure of the sucker rod hot stretching and straightening device provided in an embodiment of the present application.

[0024] Explanation of the reference numerals: frame 1, hydraulic cylinder 2, piston rod 3, slide block 4, clamping structure 5, cylindrical rod 6, limit switch 7, mounting seat 8, through hole 9, notch 10, locking bolt 11, scale 12, push rod 13. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0026] like Figure 1-Figure 6 As shown:

[0027] The sucker rod hot stretching straightening device provided in one embodiment of the present application comprises a frame 1, and a hydraulic cylinder 2 is fixed to one end of the frame 1. Specifically, the cylinder body of the hydraulic cylinder 2 is fixed to the right end of the frame 1, and the hydraulic cylinder 2 is horizontally distributed along the length direction of the frame 1.

[0028] The end of the piston rod 3 of the hydraulic cylinder 2 is fixed with a slider 4. Specifically, the end of the piston rod 3 is fixedly connected to the middle position of the slider 4. A clamping structure 5 for clamping the end of the sucker rod is fixed to one end of the slider 4 and the other end of the frame 1. Specifically, the clamping structure 5 can clamp the ends of sucker rods of different diameters. The left end of the slider 4 and the right end of the frame 1 are respectively installed with the clamping structure 5.

[0029] Two symmetrically distributed cylindrical rods 6 are fixed to the upper part of the frame 1, and the cylindrical rods 6 penetrate the slider 4 and are slidably connected to the slider 4. Specifically, the cylindrical rods 6 are distributed along the length direction of the frame 1, and the two cylindrical rods 6 are symmetrically distributed front and back about the center of the frame 1. The two cylindrical rods 6 can not only guide the slider 4, but also improve the tensile strength of the two ends of the frame 1 to prevent the ends of the frame 1 from deformation.

[0030] A limit switch 7 capable of controlling the retraction stroke of the hydraulic cylinder 2 is disposed on one of the cylindrical rods 6 , and the limit switch 7 can be moved axially along the cylindrical rod 6 and locked.

[0031] The slider 4 can touch the limit switch 7 after moving to one end of the frame 1, so that the hydraulic cylinder 2 stops the contraction work. Specifically, the slider 4 can touch the limit switch 7 after moving to the right end of the frame 1.

[0032] In this embodiment, the clamping structure 5 for clamping the end of the sucker rod and the limit switch 7 for controlling the hydraulic cylinder 2 to stop contracting are both prior art and will not be described in detail.

[0033] When in use, the tensile displacement of the sucker rod is set according to the diameter of the sucker rod and the performance level of the sucker rod.

[0034] After the two clamping structures 5 clamp and fix the sucker rod after heat treatment and tempering, the position of the limit switch 7 is adjusted according to the set tensile displacement of the sucker rod. Among them, since the sucker rod is fixed by two clamping structures 5, one of which is fixed on the slider 4, the set tensile displacement is the distance between the limit switch 7 and the slider 4. Then start the hydraulic cylinder 2 to make the hydraulic cylinder 2 shrink. The hydraulic cylinder 2 drives the slider 4 to move to the right end of the frame 1, and the slider 4 drives the clamping structure 5 connected to it to move to the right. During the movement of the clamping structure 5 to the right, the sucker rod is stretched and straightened. When the moving distance of the slider 4 reaches the set displacement, the right end of the slider 4 touches the limit switch 7 and the hydraulic cylinder 2 stops shrinking. Finally, according to the pressure holding time, the sucker rod is completely cooled to complete the stretching and straightening of the sucker rod.

[0035] The sucker rod hot stretching and straightening device provided in the present embodiment is provided with a limit switch 7 on one of the cylindrical rods 6 that can control the contraction stroke of the hydraulic cylinder 2, and the limit switch 7 can move axially along the cylindrical rod 6 and be locked, and the slider 4 can touch the limit switch 7 after moving toward one end of the frame 1, so that when in use, the limit switch 7 can control the displacement of the hydraulic cylinder 2 in stretching the sucker rod, and then when hot stretching and straightening the sucker rods of the same diameter, the stretching and straightening effect of the sucker rod can be ensured by controlling the displacement of the stretched sucker rod, and then, while ensuring that the straightness of the rod body or the rod head does not exceed the standard, the bending phenomenon of the rod body and the rod head and the local necking problem that are visible to the naked eye can be eliminated.

[0036] In some embodiments of the present application, a mounting seat 8 is sleeved on one of the cylindrical rods 6. Specifically, the mounting seat 8 is sleeved on the cylindrical rod 6 located at the front end of the frame 1.

[0037] The mounting seat 8 can be moved and locked along the axial direction of the cylindrical rod 6, and the limit switch 7 is installed on the mounting seat 8, so that the limit switch 7 can be moved along the axial direction of the cylindrical rod 6, and the limit switch 7 can be locked after moving.

[0038] In some embodiments of the present application, a notch 10 distributed along the axial direction is provided at the side end of one of the cylindrical rods 6. Specifically, the notch 10 is provided on the cylindrical rod 6 located at the front end of the frame 1, and the notch 10 is located at the front end of the cylindrical rod 6.

[0039] The mounting seat 8 is provided with a through hole 9 adapted to the notch 10 position of the cylindrical rod 6, and the notch 10 position of the cylindrical rod 6 passes through the through hole 9 and is slidably connected with the through hole 9. Specifically, the shape of the through hole 9 is the same as the cross-sectional structure of the notch 10 position of the cylindrical rod 6.

[0040] In this embodiment, a notch 10 is provided at the front end of the cylindrical rod 6, and the mounting seat 8 is provided at the position of the notch 10, so that the mounting seat 8 can only move along the axial direction of the cylindrical rod 6, making it convenient for the staff to determine the position of the limit switch 7 according to the set movement amount.

[0041] In some embodiments of the present application, a locking bolt 11 capable of pressing the cylindrical rod 6 is threadedly connected to the mounting seat 8 .

[0042] When in use, the locking bolt 11 is rotated and moved away from the cylindrical rod 6, and the locking of the mounting seat 8 is released, and the limit switch 7 can move along the axial direction of the cylindrical rod 6 with the mounting seat 8 to adjust the position of the limit switch 7. After the locking bolt 11 is rotated and pressed against the cylindrical rod 6, the locking work of the mounting seat 8 is realized, that is, the limit switch 7 is locked.

[0043] In some embodiments of the present application, a scale 12 distributed axially along the cylindrical rod 6 is fixed on the slider 4 , the scale 12 is located in the notch 10 , and the scale 12 passes through the mounting seat 8 and is slidably connected to the mounting seat 8 .

[0044] When in use, since the scale 12 is fixed on the slider 4 and can move with the slider 4, it is only necessary to adjust the position of the mounting seat 8 according to the scale line of the scale 12 to determine the distance between the limit switch 7 and the right end of the slider 4. Then, when stretching and straightening sucker rods of different specifications, it is convenient for the staff to determine the position of the limit switch 7 according to the set displacement.

[0045] In order to further facilitate the staff to determine the position of the limit switch 7 according to the set displacement, in some embodiments of the present application, the zero scale line of the scale 12 coincides with the end of the slider 4 close to the hydraulic cylinder 2. Specifically, the zero scale line coincides with the right end of the slider 4.

[0046] In some embodiments of the present application, the limit switch 7 is a direct-acting travel switch.

[0047] After the push rod 13 of the direct-acting travel switch contacts its contact, one end of the push rod 13 overlaps with one end of the mounting seat 8. Specifically, the contact end of the push rod 13 with the slider 4 overlaps with the left end of the mounting seat 8.

[0048] In this embodiment, after the push rod 13 of the direct-acting travel switch contacts its contact, the contact end of the push rod 13 and the slider 4 coincides with the left end of the mounting seat 8, that is, when the slider 4 touches the push rod 13 and the push rod 13 contacts the contact of the direct-acting travel switch, the right end of the slider 4 coincides with the left end of the mounting seat 8. Therefore, before the sucker rod is stretched, the distance between the right end of the slider 4 and the left end of the mounting seat 8 is the set displacement. Then, according to the set displacement, the staff only needs to make the left end of the mounting seat 8 coincide with the corresponding scale line to determine the moving distance of the slider 4, which is convenient for adjusting the position of the limit switch 7.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sucker rod hot stretching straightening device, comprising a frame (1), a hydraulic cylinder (2) is fixed to one end of the frame (1), a slider (4) is fixed to the end of the piston rod (3) of the hydraulic cylinder (2), a clamping structure (5) for clamping the end of the sucker rod is fixed to one end of the slider (4) and the other end of the frame (1), two symmetrically distributed cylindrical rods (6) are fixed to the upper part of the frame (1), and the cylindrical rods (6) penetrate the slider (4) and are slidably connected to the slider (4), characterized in that: A limit switch (7) capable of controlling the retraction stroke of the hydraulic cylinder (2) is provided on one of the cylindrical rods (6), and the limit switch (7) can be moved axially along the cylindrical rod (6) and locked; The slider (4) can touch the limit switch (7) after moving toward one end of the frame (1).

2. The sucker rod hot stretching and straightening device according to claim 1, characterized in that: A mounting seat (8) is sleeved on one of the cylindrical rods (6). The mounting seat (8) can be moved axially along the cylindrical rod (6) and locked. The limit switch (7) is mounted on the mounting seat (8).

3. The sucker rod hot stretching and straightening device according to claim 2, characterized in that: A notch (10) is provided at the side end of one of the cylindrical rods (6) along its axial direction, and the mounting seat (8) is provided with a through hole (9) adapted to the position of the notch (10) of the cylindrical rod (6), and the notch (10) of the cylindrical rod (6) passes through the through hole (9) and is slidably connected to the through hole (9).

4. The sucker rod hot stretching and straightening device according to claim 2, characterized in that: The mounting seat (8) is threadedly connected with a locking bolt (11) capable of tightly pressing the cylindrical rod (6).

5. The sucker rod hot stretching and straightening device according to claim 3, characterized in that: A scale (12) distributed along the axial direction of the cylindrical rod (6) is fixed on the slider (4); the scale (12) is located in the notch (10); and the scale (12) passes through the mounting seat (8) and is slidably connected to the mounting seat (8).

6. The sucker rod hot stretching and straightening device according to claim 5, characterized in that: The zero scale line of the scale (12) coincides with an end of the slider (4) close to the hydraulic cylinder (2).

7. The sucker rod hot stretching and straightening device according to claim 6, characterized in that: The limit switch (7) is a direct-acting travel switch; After the push rod (13) of the direct-acting travel switch contacts its contact point, one end of the push rod (13) overlaps with one end of the mounting seat (8).

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