CN215980333U

CN215980333U - Safe and stable double-prevention crank pin assembly applied to pumping unit

Info

Publication number: CN215980333U
Application number: CN202122496559.6U
Authority: CN
Inventors: 刘伏香; 程汉; 许文臣; 杨春晖; 王丽君; 崔凌燕; 赵琢萍; 彭灵
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-16
Filing date: 2021-10-16
Publication date: 2022-03-08
Anticipated expiration: 2031-10-16

Abstract

The utility model relates to the technical field of oil exploitation equipment, and discloses a safe and stable double-prevention crank pin assembly applied to a pumping unit, which comprises a bearing, a crank pin fixedly connected with the left side surface of the bearing, a screw cap, wherein the screw thread section arranged on the circumferential side surface of the crank pin far away from the bearing is in threaded engagement with the screw thread section on the circumferential side surface of the crank pin; according to the utility model, through the arrangement of the middle air cushion block, the air guide hole, the first sliding cavity and the second sliding cavity, the spaciousness between the structural members of the equipment is early-warned and monitored in real time, so that the use state of the equipment can be conveniently judged by a maintainer, and the occurrence of a miss-off accident can be avoided.

Description

Safe and stable double-prevention crank pin assembly applied to pumping unit

Technical Field

The utility model relates to the technical field of oil exploitation equipment, in particular to a safe and stable double-prevention crank pin assembly applied to a pumping unit.

Background

The oil pumping machine is a machine for exploiting oil, and is commonly called a head knocking machine. The pumping unit is the most main lifting equipment in the rod pumping system. The beam pumping unit can be divided into a beam pumping unit and a non-beam pumping unit according to whether a beam exists or not, and the beam pumping unit has the basic characteristics of simple structure, easy manufacture and convenient use, and particularly can be operated in an oil field all weather for a long time and is reliable in use. Therefore, the oil pumping unit is most widely applied, although the disadvantages of large acceleration of the horse head suspension point movement, poor balancing effect, low efficiency, large volume and heavy weight in long stroke exist.

As disclosed in the chinese patent: the crank pin assembly is prevented to beam-pumping unit doubly, patent number: CN201820226947.8, when the crank pin is elongated due to mechanical vibration, the screw cap will rotate with it and loosen, because the friction between the radial convex grain surface at the outer side of the gasket and the connecting rod is larger than the friction between the oblique tooth surface I and the oblique tooth surface II at the inner side, in this state, only the relative dislocation between the oblique tooth surface I and the oblique tooth surface II at the inner side is allowed, and then certain lifting tension is generated; when the crank pin shrink, the oblique flank of tooth I of gasket can make the screw cap get back to original position to reach 100% locking and the tight effect of system, but above-mentioned device does not possess early warning monitoring structure in the use, can't play the function that the early warning was out of stock when the screw was equipped with the cap and takes place great degree displacement, factor of safety remains to be improved.

Therefore, the safe and stable double-prevention crank pin assembly applied to the pumping unit is provided.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problems in the prior art and provides a safe and stable double-prevention crank pin assembly applied to a pumping unit.

In order to achieve the purpose, the utility model adopts the following technical scheme, and the safe and stable double-prevention crank pin assembly applied to the pumping unit comprises a bearing, a crank pin fixedly connected with the left side surface of the bearing, a thread section arranged on the circumferential side surface of the crank pin far away from the bearing, and a screw cap in threaded engagement with the thread section on the circumferential side surface of the crank pin, wherein hemispherical inner grooves are equidistantly formed in one side of the screw cap close to the bearing, hemispherical convex blocks are attached to the inner wall of each hemispherical inner groove, an annular gasket is fixedly connected to one side of each hemispherical convex block close to the bearing, anti-falling devices are arranged at the left end of the inner part of the crank pin, and early warning devices are equidistantly arranged on the circumferential side surface of the screw cap.

Preferably, the anticreep device includes the locating hole, the locating hole is seted up in crank pin circumference side left end edge, the inner wall laminating of locating hole has the cushion collar layer, the inner wall laminating on cushion collar layer has the threaded rod, the equal rotation in position that both ends were kept away from each other about the threaded rod circumference side is connected with hexagon nut.

As preferred, early warning device includes the rectangle piece, and two correspond anticreep device positions the rectangle piece is kept away from air cushion in the one side fixedly connected with of bearing, the air guide hole has been seted up to one side that the rectangle piece is close to air cushion, smooth chamber one has been seted up to the inside of rectangle piece, the inner wall top surface of smooth chamber one runs through and has been seted up smooth chamber two, the inner wall sliding connection of smooth chamber one has flat base, one side fixedly connected with slide bar of screw cap circumference side is kept away from to flat base inner wall, the circumference side spraying of slide bar has the double-colored coating of warning.

Preferably, the side of the two hexagonal nuts close to each other is attached to the circumferential side surface of the crank pin, and the buffer sleeve layer is made of a rubber material.

Preferably, the inner wall of the annular gasket is sleeved on the circumferential side face of the crank pin, the middle air cushion block is located at the right side position of the hexagon nut and is made of rubber materials, one side, close to the rectangular block, of the hollow air cushion block is provided with a through hole and communicated with the inner wall of the air guide hole, the circumferential side face of the flat base is in sliding connection with the inner wall of the first sliding cavity, and the circumferential side face of the sliding rod is in sliding connection with the inner wall of the second sliding cavity.

Preferably, the right side surfaces of the two hollow air cushion blocks are fixedly connected with the left side surface of the screw cap at positions close to each other, and the warning double-color coating is made of a high-fastness light-reflecting material.

Advantageous effects

The utility model provides a safe and stable double-prevention crank pin assembly applied to a pumping unit. The method has the following beneficial effects:

(1) this be applied to safe and stable type dual-protection crank pin assembly of beam-pumping unit, through the setting of hemisphere inner groovy and hemisphere lug, at the in-process that annular gasket used, it may be with taking place between the crank pin assembly relative rotation or vibrations make it not inseparable with the laminating of screw cap, because hemisphere lug block is at the inner wall of hemisphere inner groovy, so can increase and keep relative static stability between annular gasket and the screw cap, in order to solve between the two problem that relative friction takes place to shorten annular gasket life, and it is also convenient relatively to dismantle the process in the installation of overhauing maintenance in-process annular gasket.

(2) This be applied to safe and stable form dual-protection crank pin assembly of beam-pumping unit, setting through the buffering jacket layer, when taking place to take off the condition of round pin dislocation, hexagon nut can receive the impact and the threaded rod also can take place the buckling deformation of certain degree, the in-process that receives the impact at the threaded rod can produce elastic deformation through the buffering jacket layer and carry out the energy-absorbing buffering, with the degree that reduces the threaded rod and warp, be favorable to going on of follow-up maintenance replacement work, and the circumference side of threaded rod does not have the inner wall direct contact with the buffering jacket layer, so can use corresponding instrument to replace the threaded rod after taking out the buffering jacket layer, the inside space vacated of locating hole makes things convenient for going on of threaded rod replacement maintenance work more like this.

(3) The safe and stable double-prevention crank pin assembly applied to the pumping unit is characterized in that through the arrangement of the middle air cushion block, the air guide hole, the first sliding cavity and the second sliding cavity, when dislocation and pin removal occur or large looseness occurs between structural components due to vibration of equipment, the distance between the hexagonal nut and the hollow air cushion block is shortened and finally the hexagonal nut and the hollow air cushion block are attached together, the hollow air cushion block is deformed under the action of force and extrudes the air in the middle air cushion block, the air guide hole and the inner wall of the first sliding cavity, the sliding rod is ejected out along the opening direction of the second sliding cavity, the stress is judged by observing the leakage height and color change of the warning double-color coating sprayed on the circumferential side surface of the sliding rod, because the warning double-color coating is made of high-fastness reflecting materials, therefore, the displacement state of the slide rod can be observed easily, whether the equipment is in a normal operation state or not is judged, and potential production accident risks are avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is an assembled view of the overall structure of the present invention;

FIG. 2 is a disassembled view of the overall structure of the present invention;

FIG. 3 is a schematic view of the back structure of the screw cap of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 2;

FIG. 5 is a schematic diagram of the internal structure of a vertical rectangular block according to the present invention.

Illustration of the drawings:

1. a bearing; 102. a crank pin; 103. a threaded segment; 104. a screw cap; 105. a hemispherical inner recess; 106. a hemispherical bump; 107. an annular gasket; 2. an anti-drop device; 201. positioning holes; 202. a buffer jacket layer; 203. a threaded rod; 204. a hexagonal nut; 3. an early warning device; 301. a rectangular block; 302. a medium air cushion block; 303. an air vent; 304. a sliding cavity I; 305. a sliding cavity II; 306. a flat base; 307. A slide bar; 308. a warning bicolor coating.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-3, the present invention provides a technical solution: be applied to two crank pin assemblies of preventing of safety and stability type of beam-pumping unit, including bearing 1, bearing 1 left surface fixed connection's crank pin 102, crank pin 102 circumference side is kept away from the screw thread section 103 that bearing 1 position was seted up and crank pin 102 circumference side screw thread section 103 position thread engagement's screw cap 104, hemispherical inner groove 105 has been seted up to one side equidistance that screw cap 104 is close to bearing 1, hemispherical lug 106 has been laminated to hemispherical inner groove 105's inner wall, hemispherical lug 106 is close to one side fixedly connected with annular gasket 107 of bearing 1, crank pin 102's inside left end is provided with anticreep device 2, the equidistant early warning device 3 that is provided with in the circumference side of screw cap 104.

When the oil pumping unit is used, the crank pin 102 is inserted into the shaft hole at the position corresponding to the crank, the left side surface of the bearing 1 is ensured to be attached to one side corresponding to the crank, then the annular gasket 107 is sleeved at the left side position of the circumferential side surface of the crank pin 102, the right side surface of the annular gasket 107 is ensured to be attached to one side corresponding to the crank, then the screw cap 104 is rotatably installed at the position of the threaded section 103 by using a corresponding tool, the assembly operation of the basic structure of the assembly can be completed, the device can generate relative rotation friction or vibration with the crank body in the operation process of the oil pumping unit, the hemispherical convex block 106 can be clamped in the inner wall of the hemispherical inner groove 105, the annular gasket 107 and the screw cap 104 can be kept in a relatively static state, the friction loss between the annular gasket and the crank can be effectively reduced, the service life of the annular gasket 107 is prolonged, and the disassembly and assembly processes of the annular gasket 107 are more convenient.

Example two

On the basis of the first embodiment, referring to fig. 2, the anti-disengaging device 2 includes a positioning hole 201, the positioning hole 201 is disposed at the left end edge of the circumferential side surface of the crank pin 102, a buffer sleeve layer 202 is attached to the inner wall of the positioning hole 201, a threaded rod 203 is attached to the inner wall of the buffer sleeve layer 202, and the positions, far away from each other, of the upper end and the lower end of the circumferential side surface of the threaded rod 203 are rotatably connected with a hexagonal nut 204.

When in use, the middle section of the threaded rod 203 is sleeved on the inner wall of the buffer sleeve layer 202, then the buffer sleeve layer 202 is inserted into the inner wall of the positioning hole 201, and the hexagonal nuts 204 are rotatably arranged at the thread positions at the upper end and the lower end of the threaded rod 203 to complete the installation and fixation operation of the device, and through the arrangement of the buffer sleeve layer 202, when the crank pin 102 and the crank body are dislocated, the impact force on the threaded rod 203 can be reduced through the stress deformation of the buffer sleeve layer 202, the deformation degree of the threaded rod 203 can be reduced, and after the threaded rod 203 generates micro deformation, the threaded rod 203 can be conveniently disassembled and taken out for replacement, the period of replacing the threaded rod 203 is shortened under the condition of pin-out dislocation, and because the buffer sleeve layer 202 is made of rubber materials, therefore, the threaded rod 203 can be easily separated from the threaded rod when being replaced, and the rapid repair operation is facilitated.

EXAMPLE III

On the basis of the first embodiment, referring to fig. 1-5, the early warning device 3 includes a rectangular block 301, one side of the rectangular block 301 away from the bearing 1 corresponding to the anti-falling device 2 is fixedly connected with a middle air cushion block 302, one side of the rectangular block 301 close to the middle air cushion block 302 is provided with an air guide hole 303, the inside of the rectangular block 301 is provided with a first sliding cavity 304, the top surface of the inner wall of the first sliding cavity 304 is provided with a second sliding cavity 305 in a penetrating manner, the inner wall of the first sliding cavity 304 is connected with a flat base 306 in a sliding manner, one side of the inner wall of the flat base 306 away from the circumferential side of the screw cap 104 is fixedly connected with a sliding rod 307, the circumferential side of the sliding rod 307 is sprayed with a warning two-color coating 308, one side of the two hexagonal nuts 204 close to each other is attached to the circumferential side of the crank pin 102, the buffer jacket layer 202 is made of rubber material, the inner wall of the annular gasket 107 is sleeved on the circumferential side of the crank pin 102, the hollow air cushion block 302 is located at the right side of the hexagonal nut 204, the middle air cushion block 302 is made of rubber materials, one side, close to the rectangular block 301, of the hollow air cushion block 302 is provided with a through hole and communicated with the inner wall of the air guide hole 303, the circumferential side face of the flat base 306 is in sliding connection with the inner wall of the first sliding cavity 304, the circumferential side face of the sliding rod 307 is in sliding connection with the inner wall of the second sliding cavity 305, the positions, close to each other, of the right side faces of the two middle air cushion blocks 302 are fixedly connected with the left side face of the screw cap 104, and the warning double-color coating 308 is made of high-fastness light-reflecting materials.

When in use, by arranging the middle air cushion block 302, the air guide hole 303, the first sliding cavity 304 and the second sliding cavity 305, when the pin removal dislocation occurs, the annular gasket 107 moves towards the left side along the position of the threaded section 103 on the circumferential side surface of the crank pin 102, so that the hexagonal nut 204 is abutted against the left side surface of the middle air cushion block 302 and keeps applying a reverse acting force, air inside the hollow air cushion block 302 is compressed to the inner walls of the air guide hole 303 and the first sliding cavity 304, then under the pushing action of compressed air, the flat base 306 and the sliding rod 307 respectively slide upwards along the inner walls of the first sliding cavity 304 and the second sliding cavity 305, the relative displacement distance between the screw cap 104 and the crank pin 102 is judged by observing the height and color of the leaked warning coating 308 sprayed on the circumferential side surface of the sliding rod 307, and the equipment does not need to be maintained when the warning double-color coating 308 leaks out of the upper end position, when the lower end position of the warning double-color coating 308 leaks, the situation that the spaciousness between the crank pin assembly structural parts is large is represented, the maintenance is carried out by stopping the machine immediately and powering off, and the warning double-color coating 308 is made of a high-fastness light-reflecting material, so that the position states of the sliding rod 307 and the warning double-color coating 308 can be observed easily and visually in the operation process of the pumping unit, and the warning double-color coating 308 has a positive effect on preventing accidents.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. Be applied to two crank pin assemblies of preventing of safety and stability type of beam-pumping unit, including bearing (1), bearing (1) left surface fixed connection's crank pin (102), crank pin (102) circumference side keep away from screw thread section (103) that bearing (1) position was seted up and crank pin (102) circumference side screw thread section (103) position thread engagement's screw cap (104), its characterized in that: hemisphere inner groovy (105) have been seted up to one side equidistance that screw cap (104) are close to bearing (1), the inner wall laminating of hemisphere inner groovy (105) has hemisphere lug (106), one side fixedly connected with annular gasket (107) that hemisphere lug (106) are close to bearing (1), the inside left end of crank pin (102) is provided with anticreep device (2), the circumference side of screw cap (104) is equidistant to be provided with early warning device (3).

2. The safe and stable double crank pin assembly for pumping unit of claim 1, wherein: anticreep device (2) are including locating hole (201), locating hole (201) are seted up in crank pin (102) circumference side left end edge, the inner wall laminating of locating hole (201) has buffering jacket layer (202), the inner wall laminating threaded rod (203) of buffering jacket layer (202), the position that both ends were kept away from each other about threaded rod (203) circumference side all rotates and is connected with hexagon nut (204).

3. The safe and stable double crank pin assembly for pumping unit of claim 1, wherein: early warning device (3) are including rectangular block (301), two corresponding anticreep device (2) positions air cushion (302) in the one side fixedly connected with of bearing (1) are kept away from to rectangular block (301), air guide hole (303) have been seted up to one side that rectangular block (301) are close to air cushion (302), smooth chamber one (304) have been seted up to the inside of rectangular block (301), the inner wall top surface of smooth chamber one (304) runs through and has seted up smooth chamber two (305), the inner wall sliding connection of smooth chamber one (304) has flat base (306), one side fixedly connected with slide bar (307) of screw cap (104) circumference side are kept away from to flat base (306) inner wall, the circumference side spraying of slide bar (307) has warning double-colored coating (308).

4. The safe and stable double crank pin assembly for pumping unit of claim 2, wherein: the side, close to each other, of the two hexagonal nuts (204) is attached to the circumferential side face of the crank pin (102), and the buffer sleeve layer (202) is made of rubber materials.

5. The safe and stable double crank pin assembly for pumping unit of claim 3, wherein: the inner wall of the annular gasket (107) is sleeved on the circumferential side face of the crank pin (102), the middle air cushion block (302) is located at the right side position of the hexagonal nut (204), the middle air cushion block (302) is made of rubber materials, a through hole is formed in one side, close to the rectangular block (301), of the middle air cushion block (302) and communicated with the inner wall of the air guide hole (303), the circumferential side face of the flat base (306) is in sliding connection with the inner wall of the first sliding cavity (304), and the circumferential side face of the sliding rod (307) is in sliding connection with the inner wall of the second sliding cavity (305).

6. The safe and stable double crank pin assembly for pumping unit of claim 3, wherein: the right side surfaces of the two middle air cushion blocks (302) are close to each other and fixedly connected with the left side surface of the screw cap (104), and the warning double-color coating (308) is made of a high-fastness light-reflecting material.