A wellhead elevator

Abstract

The utility model discloses an oil well wellhead elevating gear, including mounting seat, the bottom fixed of mounting seat is equipped with four rectangular arrangement's support leg, the top fixed of mounting seat is equipped with double -end motor, the top fixed of mounting seat is equipped with two locating plate, both ends of double -end motor all movably are equipped with the pivot, the utility model discloses setting the vertical board, the ratchet wheel, the mounting panel, the transverse board, the pawl, the pole, the limiting board, the spring and the pull rod, the pivot drives the reel and the ratchet wheel when the placement board rises, the reel drives the placement board through the steel rope, the ratchet wheel anticlockwise rotation extrusion one side's pawl, and the pawl rotates and extrudes the spring, when the top of pawl from the ratchet wheel current's slot inside breaks out, the spring pushes pawl reset, and the pawl will be clamped in another slot, if the double -end motor fails when in the rising period, the pawl will lock the ratchet wheel, thereby can prevent the placement board to plummet suddenly the situation appears.

Description

Technical Field

[0001] This utility model relates to the field of oil wellhead equipment technology, and in particular to an oil wellhead lifting device. Background Technology

[0002] An oil wellhead lifting device is a mechanical device used to lift objects. Common lifting devices use a double-head motor to drive a winding reel, which lifts the bottom placement plate by pulling a steel cable. However, existing lifting devices do not have a locking structure. When the double-head motor fails and the object is being lifted, the placement plate may suddenly drop and damage it. Therefore, an oil wellhead lifting device is proposed. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an oil wellhead lifting device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an oil wellhead lifting device, comprising a mounting base, four rectangularly arranged support legs fixedly mounted at the bottom of the mounting base, a double-head motor fixedly mounted at the top of the mounting base, two positioning plates fixedly mounted at the top of the mounting base, rotating shafts movably mounted at both ends of the double-head motor, one end of each rotating shaft being movably connected to the two positioning plates, a winding reel fixedly mounted on each of the two rotating shafts, a placement plate below the mounting base, a protective cover at the top of the mounting base, and two locking structures fixedly mounted at the top of the mounting base.

[0005] As a further description of the above technical solution:

[0006] Both winding reels are wound with steel ropes, and two mounting brackets are fixedly provided on the top of the placement plate. The bottom ends of the two steel ropes are respectively fixedly connected to the top of the two mounting brackets.

[0007] As a further description of the above technical solution:

[0008] A buffer pad is fixedly provided at the bottom of the placement plate, and the buffer pad has multiple honeycomb holes.

[0009] As a further description of the above technical solution:

[0010] The locking structure includes a ratchet fixedly connected to a rotating shaft and a vertical plate fixedly connected to a mounting base. A mounting plate and a horizontal plate are fixedly provided on the front of the vertical plate. A pawl is movably provided on the front of the vertical plate. A stop bar is fixedly provided on the front of the vertical plate. A spring is fixedly provided on one side of the horizontal plate. The other end of the spring is attached to one side of the pawl. A pull rod is movably provided on the mounting plate.

[0011] As a further description of the above technical solution:

[0012] A limiting plate is fixedly provided on one side of the horizontal plate, and a pull rope is fixedly provided at one end of the pull rod. The end of the pull rope away from the pull rod is fixedly connected to the pawl.

[0013] As a further description of the above technical solution:

[0014] The mounting plate has a through hole, and the inner wall of the through hole is provided with a sealing ring. The inner wall of the sealing ring is movably connected to the pull rod.

[0015] As a further description of the above technical solution:

[0016] Both of the two positioning plates have grooves on their adjacent sides, and bearings are fixedly installed in the grooves. The inner ring of the bearings is fixedly sleeved on the rotating shaft.

[0017] This utility model has the following beneficial effects:

[0018] 1. Compared with existing technologies, this wellhead lifting device for oil wells is equipped with a vertical plate, ratchet, mounting plate, horizontal plate, pawl, stop bar, limit plate, spring, and pull rod. When the placement plate rises, the shaft drives the winding reel and ratchet. The winding reel drives the placement plate through a steel rope. The ratchet rotates clockwise and squeezes the pawl on one side. The pawl rotates and squeezes the spring. When the tip of the pawl disengages from the current slot of the ratchet, the spring pushes the pawl back to its original position, and the pawl will lock into the other slot. If the dual-head motor fails during the ascent, the pawl will lock the ratchet, thereby preventing the placement plate from suddenly falling.

[0019] 2. Compared with existing technologies, this wellhead lifting device for oil wells, by setting up a buffer pad and honeycomb holes, ensures that when the placement plate descends to the bottom of the well, the buffer pad will contact the ground, and the multiple honeycomb holes can play a buffering role, which can reduce the vibration amplitude when the placement plate falls. Attached Figure Description

[0020] Figure 1 This is a first-view three-dimensional structural diagram of an oil wellhead lifting device proposed in this utility model.

[0021] Figure 2 This is a second-view three-dimensional structural diagram of an oil wellhead lifting device proposed in this utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of an oil wellhead lifting device proposed in this utility model after removing the protective cover.

[0023] Figure 4 This is a three-dimensional schematic diagram of the locking structure in an oil wellhead lifting device proposed in this utility model;

[0024] Figure 5 This is a cross-sectional schematic diagram of the buffer pad in an oil wellhead lifting device proposed in this utility model.

[0025] Legend:

[0026] 1. Mounting base; 2. Support leg; 3. Dual-head motor; 4. Positioning plate; 5. Rotary shaft; 6. Reel; 7. Steel rope; 8. Mounting frame; 9. Placement plate; 10. Protective cover; 11. Locking structure; 111. Vertical plate; 112. Ratchet; 113. Mounting plate; 114. Horizontal plate; 115. Pad; 116. Stop bar; 117. Limiting plate; 118. Spring; 119. Pull rod; 12. Buffer pad; 13. Honeycomb perforation. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Reference Figures 1 to 5 This utility model provides an oil wellhead lifting device, including a mounting base 1, four rectangular support legs 2 fixedly mounted on the bottom of the mounting base 1, a double-head motor 3 fixedly mounted on the top of the mounting base 1, two positioning plates 4 fixedly mounted on the top of the mounting base 1, rotating shafts 5 movably mounted at both ends of the double-head motor 3, grooves provided on the adjacent sides of the two positioning plates 4, bearings fixedly mounted in the grooves, the inner rings of the bearings fixedly mounted on the rotating shafts 5, one end of each of the two rotating shafts 5 being movably connected to the two positioning plates 4, a winding reel 6 fixedly mounted on each of the two rotating shafts 5, steel ropes 7 wound on each of the two winding reels 6, two mounting brackets 8 fixedly mounted on the top of the placement plate 9, the bottom ends of the two steel ropes 7 being fixedly connected to the top of the two mounting brackets 8, a placement plate 9 below the mounting base 1, and a protective cover 10 on the top of the mounting base 1.

[0029] In order to reduce the amplitude, a buffer pad 12 is fixedly provided at the bottom of the placement plate 9. The buffer pad 12 has multiple honeycomb holes 13. When the buffer pad 12 is squeezed, the air flows in the honeycomb holes 13 to generate damping, thereby achieving the effect of buffering and shock absorption.

[0030] To prevent the placement plate 9 from falling due to a malfunction of the dual-head motor 3, two locking structures 11 are fixedly installed on the top of the mounting base 1. Each locking structure 11 includes a ratchet 112 fixedly connected to the rotating shaft 5 and a vertical plate 111 fixedly connected to the mounting base 1. A mounting plate 113 and a horizontal plate 114 are fixedly installed on the front of the vertical plate 111. A pawl 115 is movably installed on the front of the vertical plate 111, and a stop bar 116 is fixedly installed on the front of the vertical plate 111. A spring 118 is fixedly installed on one side of the horizontal plate 114, with the other end of the spring 118 fitting against one side of the pawl 115. A pull rod 119 is movably installed on the mounting plate 113, which has a through hole. A sealing ring is installed on the inner wall of the through hole, and the inner wall of the sealing ring and the pull rod 119 are movably connected. A limiting plate 117 is fixedly provided on one side of the horizontal plate 114. A pull rope is fixedly provided at one end of the pull rod 119. The end of the pull rope away from the pull rod 119 is fixedly connected to the pawl 115. The rotating shaft 5 drives the winding reel 6 and the ratchet 112. The winding reel 6 drives the placement plate 9 through the steel rope 7. The ratchet 112 rotates clockwise and squeezes the pawl 115 on one side. The pawl 115 rotates and squeezes the spring 118. When the top of the pawl 115 is dislodged from the current slot of the ratchet 112, the spring 118 pushes the pawl 115 to reset. The pawl 115 will be stuck in another slot. If the dual-head motor 3 fails during the lifting process, the pawl 115 will lock the ratchet 112, thereby preventing the placement plate 9 from falling suddenly.

[0031] Working principle: When the placement plate 9 needs to rise, the dual-head motor 3 is started to rotate clockwise. The dual-head motor 3 drives the take-up reel 6 and ratchet 112 through the rotating shaft 5. The take-up reel 6 drives the placement plate 9 through the steel cable 7. The ratchet 112 rotates clockwise and squeezes the pawl 115 on one side. The pawl 115 rotates and squeezes the spring 118. When the tip of the pawl 115 disengages from the current slot of the ratchet 112, the spring 118 pushes the pawl 115 back to its original position, and the pawl 115 will then be stuck in the other slot. If the dual-head motor 3 is used during the rising process... When motor 3 malfunctions, pawl 115 will lock ratchet 112, thus preventing the placement plate 9 from falling suddenly. When personnel need to lower the placement plate 9, they should pull rod 119 outward. Rod 119 will pull pawl 115 and ratchet 112 through the pull rope. Then, start the dual-head motor 3 to reverse it. When the placement plate 9 descends to the bottom of the well, the buffer pad 12 will contact the ground. Multiple honeycomb holes 13 can play a buffering role, which can reduce the vibration amplitude when the placement plate 9 falls.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wellhead lifting device for oil wells, comprising a mounting base (1), characterized in that: The bottom of the mounting base (1) is fixedly provided with four support legs (2) arranged in a rectangular shape. The top of the mounting base (1) is fixedly provided with a double-head motor (3). The top of the mounting base (1) is fixedly provided with two positioning plates (4). Both ends of the double-head motor (3) are movably provided with rotating shafts (5). One end of the two rotating shafts (5) is movably connected to the two positioning plates (4) respectively. Both rotating shafts (5) are fixedly provided with winding reels (6). The bottom of the mounting base (1) is provided with a placement plate (9). The top of the mounting base (1) is provided with a protective cover (10). The top of the mounting base (1) is fixedly provided with two locking structures (11).

2. The wellhead lifting device according to claim 1, characterized in that: Both of the two winding reels (6) are wound with steel ropes (7), and two mounting brackets (8) are fixedly provided on the top of the placement plate (9). The bottom ends of the two steel ropes (7) are respectively fixedly connected to the top of the two mounting brackets (8).

3. The wellhead lifting device according to claim 1, characterized in that: The bottom of the placement plate (9) is fixedly provided with a buffer pad (12), and the buffer pad (12) is provided with a plurality of honeycomb holes (13).

4. The wellhead lifting device according to claim 1, characterized in that: The locking structure (11) includes a ratchet (112) fixedly connected to the rotating shaft (5) and a vertical plate (111) fixedly connected to the mounting base (1). The front of the vertical plate (111) is fixedly provided with a mounting plate (113) and a horizontal plate (114). The front of the vertical plate (111) is movably provided with a pawl (115). The front of the vertical plate (111) is fixedly provided with a stop bar (116). A spring (118) is fixedly provided on one side of the horizontal plate (114). The other end of the spring (118) is attached to one side of the pawl (115). A pull rod (119) is movably provided on the mounting plate (113).

5. The wellhead lifting device according to claim 4, characterized in that: A limiting plate (117) is fixedly provided on one side of the horizontal plate (114), and a pull rope is fixedly provided at one end of the pull rod (119). The end of the pull rope away from the pull rod (119) is fixedly connected to the pawl (115).

6. The wellhead lifting device according to claim 4, characterized in that: The mounting plate (113) is provided with a through hole, and the inner wall of the through hole is provided with a sealing ring. The inner wall of the sealing ring is movably connected to the pull rod (119).

7. The wellhead lifting device according to claim 1, characterized in that: The two positioning plates (4) are provided with grooves on their adjacent sides, and bearings are fixedly installed in the grooves. The inner ring of the bearings is fixedly sleeved on the rotating shaft (5).

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