CN111794714A - Lever anti-theft device is pressed to beam-pumping unit - Google Patents
Lever anti-theft device is pressed to beam-pumping unit Download PDFInfo
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- CN111794714A CN111794714A CN202010658097.0A CN202010658097A CN111794714A CN 111794714 A CN111794714 A CN 111794714A CN 202010658097 A CN202010658097 A CN 202010658097A CN 111794714 A CN111794714 A CN 111794714A
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- pressure plate
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- 238000005086 pumping Methods 0.000 title claims abstract description 66
- 210000004907 gland Anatomy 0.000 claims abstract description 18
- 238000013016 damping Methods 0.000 claims description 10
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000013011 mating Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B65/00—Locks or fastenings for special use
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a pressure bar anti-theft device of an oil pumping unit, which comprises a pressure plate, a gland, an anti-theft lock mechanism and a connecting mechanism, wherein the gland is arranged on the pressure plate; the shell of the anti-theft lock mechanism is provided with an embedded section and a matching section, and the inner wall of the matching section is provided with a lower limiting bulge and an upper limiting bulge; the eccentric sleeve comprises a thread matching part and a shell matching part, and two ends of the shell matching part are respectively arranged opposite to the lower limiting bulge and the upper limiting bulge; the upper cover is matched with one side of the matching section away from the embedded section; the first nut and the second nut of the connecting mechanism are both in threaded connection with the connecting screw rod, and the first nut and the second nut are both located in the cavity of the connecting mechanism. The anti-theft lock mechanism is set to be a closed structure, and the anti-theft performance of the oil pumping unit pressure bar anti-theft device is effectively improved. And the anti-theft lock mechanism and the connecting mechanism can effectively absorb the problem of over-tight matching of parts caused by the vibration of the pumping unit, so that the reusability of the pumping unit pressure bar anti-theft device is improved.
Description
Technical Field
The invention relates to the field of anti-theft of pumping units, in particular to an anti-theft device for a pressure lever of a pumping unit.
Background
In order to effectively avoid the theft problem of the pressure bar of the pumping unit, the anti-theft device of the pressure bar is arranged on the pressure bar to realize the anti-theft of the pressure bar.
As shown in fig. 1, a conventional pumping unit pressure bar antitheft device (CN202628043U) includes: the anti-theft lock comprises a pressing plate 1', a fastening bolt 12', a pressing cover 2' and an anti-theft lock, wherein the fastening bolt 12' is arranged on the pressing plate 1', a pressing nut 13' is arranged on the fastening bolt 12', the pressing cover 2' is buckled on the pressing nut 13', and the pressing cover 2' is fixed on the pressing plate 1' through the anti-theft lock in a threaded manner. The anti-theft lock comprises a positioning sleeve lock body 5', an inner sleeve 7', an eccentric sleeve 8', a spring lock upper cover and a lock cylinder screw rod 4', wherein the inner sleeve 7' is arranged in the positioning sleeve lock body 5', the eccentric sleeve 8' is limited and rotatably arranged in the inner sleeve 7' through a limiting plate 6' fixedly arranged at the bottom end of the inner sleeve 7', the lock cylinder screw rod 4' is in threaded connection with the eccentric sleeve 8', the bottom end of the lock cylinder screw rod is fixed on a pressing plate 1', and the upper end of the lock cylinder screw rod is provided with the. The bottom end of the locating sleeve lock body 5' is symmetrically provided with convex blocks which are matched with the grooves 3' arranged on the gland 2 '.
The pumping unit pressure bar anti-theft device with the structure mainly has two problems, the first is that a gap is formed between the upper cover of the spring lock and the inner sleeve 7', and a thief can pry a rod or a stick (such as a bamboo stick) with certain elasticity and hardness into the gap between the eccentric sleeve 8' and the lock core screw rod 4' from the gap between the upper cover of the spring lock and the inner sleeve 7', so that the eccentric sleeve 8' is rotated without a special tool; secondly, the vibration of the pumping unit is transmitted to the anti-theft lock and the compression nut 13' from bottom to top, so that the anti-theft lock is matched with the gland 2' and the compression nut 13', the pressure plate 1' and the fastening bolt 12' are matched more and more tightly, the worker cannot detach the pressure bar anti-theft device, the detached pressure bar anti-theft device cannot be reused on other pumping units, and the whole set of pressure bar anti-theft device can only be abandoned when the pumping unit is replaced.
Therefore, how to provide an oil pumping unit pressure bar anti-theft device capable of effectively improving the anti-theft performance and the reusability becomes a technical problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a novel technical scheme of an oil pumping unit pressure bar anti-theft device capable of effectively improving anti-theft performance and reusability.
According to a first aspect of the invention, an anti-theft device for a pressure bar of an oil pumping unit is provided.
The anti-theft device for the pressure lever of the oil pumping unit comprises a pressure plate, a gland, an anti-theft lock mechanism and a connecting mechanism; wherein,
the pressing cover is positioned on the pressing plate, and an anti-theft lock mechanism groove and a connecting mechanism cavity are formed in the pressing cover;
the anti-theft lock mechanism comprises an anti-theft screw, a shell, an eccentric sleeve and an upper cover;
the anti-theft screw is in threaded fit with the pressure plate, and extends from the pressure plate towards the direction of the anti-theft lock mechanism groove;
the shell is provided with a chimeric section and a matching section which are sequentially arranged from bottom to top, the chimeric section is in interference fit with the anti-theft lock mechanism groove so that the shell is embedded in the anti-theft lock mechanism groove, and the inner wall of the matching section is provided with a lower limiting bulge and an upper limiting bulge;
the eccentric sleeve comprises a thread matching part and a shell matching part, the thread matching part is in thread matching with the anti-theft screw, the shell matching part is arranged around the anti-theft screw, a central shaft of the shell matching part is not collinear with a central shaft of the anti-theft screw, two ends of the shell matching part are respectively arranged opposite to the lower limiting bulge and the upper limiting bulge, and gaps are formed among the shell matching part, the lower limiting bulge, the upper limiting bulge and the inner wall of the shell;
the upper cover is matched with one side of the matching section, which is far away from the embedding section, so as to seal an opening on one side of the matching section, which is far away from the embedding section;
the connecting mechanism comprises a connecting screw rod, a first nut and a second nut;
two ends of the connecting screw rod are respectively in threaded connection with the oil pumping unit fixing reserved part and the pressing plate, and the connecting screw rod extends from the pressing plate to the connecting mechanism cavity;
the first nut and the second nut are both in threaded connection with the connecting screw rod, and are both positioned in the connecting mechanism cavity, and the first nut is adjacent to the pressure plate relative to the second nut;
a gap is formed between the first nut and the pressure plate, and a gap is formed between the second nut and the first nut.
Optionally, the engaging section includes an engaging main body and an elastic piece, an outer wall of the engaging main body is matched with an inner wall of the anti-theft lock mechanism groove, the elastic piece extends from the inner wall of the engaging main body toward the anti-theft screw, and the elastic piece is located at one end of the engaging main body adjacent to the pressing plate.
Optionally, a gap is formed between the elastic sheet and the pressure plate, a gap is formed between the elastic sheet and the lower limiting protrusion, and the gap between the elastic sheet and the pressure plate is smaller than the gap between the elastic sheet and the lower limiting protrusion.
Optionally, the elastic piece has an extending portion extending toward the pressure plate, and a gap between the extending portion and the pressure plate is smaller than a gap between an end of the fitting main body and the pressure plate.
Optionally, the lower limiting protrusion and the upper limiting protrusion are arranged around the anti-theft screw, and the lower limiting protrusion abuts against the outer wall of the thread matching portion.
Optionally, the anti-theft lock mechanism further comprises a flexible gasket;
the flexible gasket is located between the top end of the anti-theft screw and the upper cover, and the flexible gasket abuts against the anti-theft screw and the upper cover.
Optionally, the anti-theft lock mechanism further comprises an upper cover locking assembly and an upper cover dismounting member;
the upper cover locking assembly comprises a locking ball and an elastic piece, a locking groove is formed in the side wall, facing the matching section, of the upper cover, a matching groove is formed in the matching section, the locking ball is in sliding fit with the locking groove and the matching groove, and the elastic piece is installed in the locking groove to provide elastic force towards the matching groove for the locking ball;
the upper cover-removing member is made of a magnetic material, and the upper cover-removing member is configured to magnetically attract the locking ball so that the locking ball moves in a direction away from the fitting groove.
Optionally, a distance between the first nut and the pressure plate is smaller than a distance between the second nut and the first nut.
Optionally, a vibration damping opening is formed in a wall of the connecting mechanism cavity, which is far away from the pressure plate, the top end of the connecting screw rod is located in the connecting mechanism cavity, and the top end of the connecting screw rod is arranged corresponding to the vibration damping opening;
the second nut is located at the end of the connecting screw.
Optionally, the second nut is a locknut.
The anti-theft lock mechanism is set to be a closed structure, and the anti-theft performance of the oil pumping unit pressure bar anti-theft device is effectively improved. And the shell of the anti-theft lock mechanism is matched with the eccentric sleeve and the gland, and the double nuts of the connecting mechanism can effectively absorb the problem of over-tight matching of parts caused by the vibration of the pumping unit, so that the reusability of the anti-theft device for the pressing lever of the pumping unit is improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic view of a conventional pumping unit pressure bar anti-theft device.
Fig. 2 is a schematic structural view of an embodiment of the anti-theft device for the pressure bar of the pumping unit of the present disclosure.
The figures are labeled as follows:
pressing plate-1 ', pressing cover-2', groove-3 ', lock cylinder screw-4', positioning sleeve lock body-5 ', limiting plate-6', inner sleeve-7 ', eccentric sleeve-8', fastening bolt-12 ', pressing nut-13', pressing plate-1, pressing cover-2, anti-theft lock mechanism groove-21, connecting mechanism cavity-22, vibration damping opening-220, anti-theft screw-3, shell-4, embedding section-41, embedding main body-411, elastic sheet-412, extension-4120, matching section-42, lower limiting bulge-421, upper limiting bulge-422, eccentric sleeve-5, thread matching part-51, shell matching part-52, upper cover-6, connecting screw-7 and first nut-8, a second nut-9, a flexible gasket-10, a locking ball-11, an elastic piece-12, an upper cover dismounting piece-13 and a pumping unit fixing reserved piece-01.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
As shown in fig. 2, the pumping unit pressure bar anti-theft device of the present disclosure includes a pressure plate 1, a gland 2, an anti-theft lock mechanism and a connection mechanism.
The gland 2 is positioned on the pressure plate 1, and the anti-theft lock mechanism groove 21 and the connecting mechanism cavity 22 are arranged on the gland 2. In specific implementation, the gland 2 covers part of the surface of the pressure plate 1, and the pressure bar is positioned on the other surface of the pressure plate 1 opposite to the gland 2.
The anti-theft lock mechanism comprises an anti-theft screw rod 3, a shell 4, an eccentric sleeve 5 and an upper cover 6.
The anti-theft screw 3 is in threaded fit with the pressure plate 1, and the anti-theft screw 3 extends from the pressure plate 1 towards the anti-theft lock mechanism groove 21.
The housing 4 has an engaging section 41 and a fitting section 42 arranged in this order from the bottom up. The fitting section 41 is interference-fitted with the anti-theft lock mechanism groove 21 so that the housing 4 is fitted in the anti-theft lock mechanism groove 21. The fitting section 41 may have a hollow structure or a solid structure. The free end of the engaging section 41 may abut against the pressure plate 1 or have a certain gap with the pressure plate 1. The inner wall of the fitting section 42 is provided with a lower limiting projection 421 and an upper limiting projection 422. The lower limiting projection 421 and the upper limiting projection 422 both extend from the inner wall of the fitting section 42 toward the central axis of the fitting section 42. In specific implementation, the lower limiting protrusion 421 and the upper limiting protrusion 422 may have a plate-like structure or a block-like structure. In addition, the lower limiting protrusion 421 and the upper limiting protrusion 422 may also have certain elasticity (e.g., elastic arms) to absorb part of the vibration from the pumping unit.
The eccentric sleeve 5 includes a screw-fitting portion 51 and a housing-fitting portion 52. The screw-fitting portion 51 is screw-fitted to the antitheft screw 3. The housing fitting portion 52 is disposed around the antitheft screw rod 3, and a certain gap is provided between an inner wall of the housing fitting portion 52 and an outer surface of the antitheft screw rod 3. The center axis of the housing fitting portion 52 is not collinear with the center axis of the antitheft screw rod 3, and thus exhibits an eccentric characteristic. The two ends of the housing matching part 52 are respectively opposite to the lower limiting projection 421 and the upper limiting projection 422, and gaps are formed between the housing matching part 52 and the lower limiting projection 521, the upper limiting projection 522 and the inner wall of the housing 4. That is, in a natural state where no external force is applied, the housing fitting portion 52 of the eccentric sleeve 5 is not in contact with the surface of the housing 4, but is maintained at a certain distance. By the arrangement, when the eccentric sleeve 5 vibrates along with the anti-theft screw 3, the eccentric sleeve 5 can be contacted with any one or more of the lower limiting bulge 521, the upper limiting bulge 522 or the inner wall of the shell 4, so that part of vibration from the pumping unit is absorbed, and the problem that the eccentric sleeve 5 and the shell 4 are tightly matched along with the vibration of the pumping unit is effectively avoided.
The upper cover 6 is fitted with a side of the fitting section 42 away from the fitting section 41 to close an opening of the side of the fitting section 42 away from the fitting section 41. The upper cover 6 may have a structure similar to that of the prior art and be detached by a permanent magnet. Or, the upper cover 6 may have a smooth arc-shaped outer surface, and be engaged with the engaging section 42 by means of a screw or a snap connection, and the upper cover 6 cannot be detached by a thief in a short time only by a dedicated detaching tool which can clamp the upper cover 6 and apply an effective force thereto.
In particular, the outer side wall of the fitting section 42 may be provided with a circumferential protrusion for limiting the position of the upper cover 6.
The connecting mechanism comprises a connecting screw 7, a first nut 8 and a second nut 9.
Two ends of the connecting screw rod 7 are respectively in threaded connection with the oil pumping unit fixing reserved part 01 and the pressing plate 1, and the connecting screw rod 7 extends from the pressing plate 1 to the connecting mechanism cavity 22.
The first nut 8 and the second nut 9 are both in threaded connection with the connecting screw 7, and the first nut 8 and the second nut 9 are both located in the connecting mechanism cavity 22. The first nut 8 is adjacent to the pressure plate 1 relative to the second nut 9.
A gap is formed between the first nut 8 and the pressure plate 1. A gap is provided between the second nut 9 and the first nut 8. The first nut 8 is positioned between the second nut 9 and the pressure plate 1, and when the pressure plate 1 is contacted with the first nut 8 due to the vibration transmitted by the pumping unit, part of the vibration of the pumping unit is absorbed by the contact between the pressure plate 1 and the first nut 8. If the first nut 8 is in contact with the second nut 9 due to vibration, the second nut 9 can prevent the first nut 8 from being loosened due to vibration, and the second nut 9 can assist in absorbing the vibration transmitted from the first nut 8.
When the anti-theft device for the pressing rod of the pumping unit is assembled, the connecting screw rod 7 and the fixed reserved part 01 of the pumping unit, the pressing rod and the pressing plate 1 are connected together in a threaded mode, and the anti-theft screw rod 3 is installed on the pressing plate 1. The first nut 8 and the second nut 9 are then screwed onto the connecting screw 7. The gland 2 is then supported on the platen 1 such that the first nut 8 and the second nut 9 are located within the coupling mechanism cavity 22. And then the combined eccentric sleeve 5 and housing 4 are sequentially mounted on the antitheft screw rod 3. And finally, mounting the upper cover 6 on the shell 4, namely completing the assembly of the oil pumping unit pressure bar anti-theft device.
When the pumping unit pressure bar anti-theft device is disassembled, the upper cover 6 is disassembled from the shell 4, and then the sleeve type disassembling tool matched with the eccentric sleeve 5 applies force to the eccentric sleeve 5, so that the eccentric sleeve 5 rotates relative to the anti-theft screw rod 3. After the eccentric sleeve 5 rotates to a certain position along the anti-theft screw 3, acting force in the direction away from the pressing plate 1 and the pressing cover 2 can be applied to the shell 4 through the upper limiting protrusion 422. With the continuous rotation of the eccentric sleeve 5, both the eccentric sleeve 5 and the housing 4 can leave the antitheft screw rod 3. The gland 2 can then be removed. Then, the second nut 9 and the first nut 8 can be detached from the connecting screw 7 in sequence. And finally, respectively disassembling the anti-theft screw 3 and the connecting screw 7, namely completing the disassembly of the oil pumping unit pressure bar anti-theft device.
The anti-theft lock mechanism and the connecting mechanism of the pressure bar anti-theft device of the pumping unit assembled together can absorb the vibration from the pumping unit, and the problem that the pressure bar anti-theft device of the pumping unit cannot be detached due to the fact that the matching between the matching parts is tighter and tighter in the prior art due to the work of the pumping unit is effectively avoided. The disassembled oil pumping unit pressure bar anti-theft device can be mounted on other oil pumping units again after the original oil pumping unit is abandoned, so that the oil pumping unit pressure bar anti-theft device is recycled.
The anti-theft lock mechanism is set to be a closed structure, and the anti-theft performance of the oil pumping unit pressure bar anti-theft device is effectively improved. And the cooperation between the shell 4 of the anti-theft lock mechanism and the eccentric sleeve 5 and the gland 2, and the problem of too tight cooperation of parts due to the vibration of the pumping unit can be effectively absorbed by the double nut arrangement of the connecting mechanism, so that the reusability of the pumping unit pressure lever anti-theft device is improved.
In one embodiment of the pumping unit pressure bar anti-theft device of the present disclosure, the fitting section 41 includes a fitting main body 411 and a spring plate 412. The outer wall of the fitting body 411 is fitted to the inner wall of the anti-theft lock mechanism groove 21, and the two are fitted together by interference. The elastic piece 412 extends from the inner wall of the fitting body 411 toward the antitheft screw 3, and the elastic piece 412 is located at one end of the fitting body 411 adjacent to the pressing plate 1. The elastic pieces 412 may be spaced apart from the pressure plate 1, or the elastic pieces 412 may be attached to the surface of the pressure plate 1. The elastic sheet 412 has certain elasticity and may have a plate-shaped structure or a sheet-shaped structure. The elastic sheet 412 is arranged to be beneficial to more effectively absorbing part of vibration from the pumping unit, so that the reusability of the pumping unit pressure bar anti-theft device is ensured.
Further, a gap is formed between the elastic piece 412 and the pressure plate 1, a gap is formed between the elastic piece 412 and the lower limiting protrusion 421, and the gap between the elastic piece 412 and the pressure plate 1 is smaller than the gap between the elastic piece 412 and the lower limiting protrusion 421. The gap between the elastic piece 412 and the pressure plate 1 and the gap between the elastic piece 412 and the lower limiting protrusion 421 are both beneficial to improving the efficiency of the elastic piece for absorbing vibration. In addition, the gap between the elastic sheet 412 and the lower limit protrusion 421 is larger than the gap between the elastic sheet 412 and the pressure plate 1, which is beneficial to effectively reducing the contact frequency of the elastic sheet 412 and the lower limit protrusion 421 caused by vibration absorption, so that the problem that the lower limit protrusion 421 is stressed to press the eccentric sleeve 5 is solved.
Further, the elastic piece 412 has an extending portion 4120 extending toward the pressure plate 1. The gap between the extension 4120 and the pressure plate 1 is smaller than the gap between the end of the fitting body 411 and the pressure plate 1. The extension 4120 may be generally located at the end of the resilient piece 412 to ensure the resiliency of the resilient piece 412. The provision of the extension 4120 is advantageous in improving the ability of the leaf spring to absorb vibrations.
In one embodiment of the pumping unit pressure bar anti-theft device of the present disclosure, in order to more effectively absorb the vibration from the pumping unit, the lower limiting protrusion 421 and the upper limiting protrusion 422 are both disposed around the anti-theft screw 3, and the lower limiting protrusion 421 abuts against the outer wall of the thread fitting portion 51.
In one embodiment of the pumping unit pressure bar anti-theft device of the present disclosure, the anti-theft lock mechanism further comprises a flexible gasket 10.
The flexible gasket 10 is positioned between the top end of the anti-theft screw 3 and the upper cover 6, and the flexible gasket 10 is abutted against the anti-theft screw 3 and the upper cover 6. The flexible gasket 10 may be made of a flexible material such as rubber or silicone. The flexible gasket is arranged to be beneficial to absorbing the vibration transmitted by the anti-theft screw 3 and the upper cover 6.
In one embodiment of the pumping unit pressure bar anti-theft device of the present disclosure, the anti-theft lock mechanism further includes an upper cover locking assembly and an upper cover removing member 13.
The upper cover locking assembly includes a locking ball 11 and an elastic member 12. The side wall of the upper cover 6 facing the matching section 42 is provided with a locking groove. The mating segment 42 is provided with a mating slot. The locking ball 11 is in sliding fit with the locking groove and the mating groove. The elastic member 12 is installed in the locking groove to provide an elastic force to the locking ball 11 toward the mating groove. The elastic member 12 may be, for example, a compression spring or an elastic arm, etc. The elastic force of the elastic member 12 applied to the locking ball 11 may make the locking ball 11 stay at the intersection line of the locking groove and the mating groove, thereby making the upper cover 6 fixed to the housing 4.
The cap remover 13 is made of a magnetic material, and the cap remover 13 may be configured to magnetically attract the locking ball 11 such that the locking ball 11 moves away from the mating groove. The upper cover-removing member 13 may have a cover-like structure or a ring-like structure or the like that fits the upper cover 6. When the upper cover 6 needs to be detached, the upper cover detaching piece 13 is installed on the upper cover 6, the locking ball 11 leaves the matching groove and completely enters the locking groove under the magnetic adsorption effect of the upper cover detaching piece 13, and at this time, the upper cover 6 can be detached from the shell 4.
The anti-theft lock mechanism with the structure can conveniently disassemble the upper cover 6, and is convenient to use.
In one embodiment of the pumping unit pressure bar anti-theft device of the present disclosure, in order to improve the efficiency of the first nut 8 in absorbing vibration, the distance between the first nut 8 and the pressure plate 1 is smaller than the distance between the second nut 9 and the first nut 8.
In one embodiment of the pumping unit pressure bar anti-theft device of the present disclosure, a vibration damping opening 220 is provided on a wall of the connecting mechanism cavity 22 away from the pressure plate 1. The top end of the connecting screw 7 is located in the connecting mechanism cavity 22, and the top end of the connecting screw 7 is arranged corresponding to the vibration damping opening 220. A second nut 9 is located at the end of the connecting screw 7. The provision of the vibration damping opening 220 facilitates absorption of stress in a portion of the gland 2 due to vibration. Generally, the size of the vibration damping opening 220 is larger than that of the connecting screw 7, and the size of the vibration damping opening 220 is smaller than that of the second nut 9, so that a certain moving space is provided for the connecting screw 7, and the problem of deformation of the gland 2 caused by hard contact between the connecting screw 7 and the gland 2 is avoided.
Further, the second nut 9 is a locknut. The locknut may be a hadamard nut or an eccentric nut, for example. The second nut 9 with the structure can improve the use safety of the pumping unit pressure bar anti-theft device.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A pumping unit pressure bar anti-theft device is characterized by comprising a pressure plate, a gland, an anti-theft lock mechanism and a connecting mechanism; wherein,
the pressing cover is positioned on the pressing plate, and an anti-theft lock mechanism groove and a connecting mechanism cavity are formed in the pressing cover;
the anti-theft lock mechanism comprises an anti-theft screw, a shell, an eccentric sleeve and an upper cover;
the anti-theft screw is in threaded fit with the pressure plate, and extends from the pressure plate towards the direction of the anti-theft lock mechanism groove;
the shell is provided with a chimeric section and a matching section which are sequentially arranged from bottom to top, the chimeric section is in interference fit with the anti-theft lock mechanism groove so that the shell is embedded in the anti-theft lock mechanism groove, and the inner wall of the matching section is provided with a lower limiting bulge and an upper limiting bulge;
the eccentric sleeve comprises a thread matching part and a shell matching part, the thread matching part is in thread matching with the anti-theft screw, the shell matching part is arranged around the anti-theft screw, a central shaft of the shell matching part is not collinear with a central shaft of the anti-theft screw, two ends of the shell matching part are respectively arranged opposite to the lower limiting bulge and the upper limiting bulge, and gaps are formed among the shell matching part, the lower limiting bulge, the upper limiting bulge and the inner wall of the shell;
the upper cover is matched with one side of the matching section, which is far away from the embedding section, so as to seal an opening on one side of the matching section, which is far away from the embedding section;
the connecting mechanism comprises a connecting screw rod, a first nut and a second nut;
two ends of the connecting screw rod are respectively in threaded connection with the oil pumping unit fixing reserved part and the pressing plate, and the connecting screw rod extends from the pressing plate to the connecting mechanism cavity;
the first nut and the second nut are both in threaded connection with the connecting screw rod, and are both positioned in the connecting mechanism cavity, and the first nut is adjacent to the pressure plate relative to the second nut;
a gap is formed between the first nut and the pressure plate, and a gap is formed between the second nut and the first nut.
2. The anti-theft device according to claim 1, wherein the engaging section includes an engaging body and a resilient piece, an outer wall of the engaging body is engaged with an inner wall of the anti-theft lock mechanism groove, the resilient piece extends from the inner wall of the engaging body toward the anti-theft screw, and the resilient piece is located at an end of the engaging body adjacent to the pressing plate.
3. The anti-theft device for the pumping unit pressure bar according to claim 2, wherein a gap is formed between the elastic sheet and the pressure plate, a gap is formed between the elastic sheet and the lower limiting protrusion, and the gap between the elastic sheet and the pressure plate is smaller than the gap between the elastic sheet and the lower limiting protrusion.
4. The anti-theft device according to claim 2, wherein the spring plate has an extension portion extending toward the pressure plate, and a gap between the extension portion and the pressure plate is smaller than a gap between an end of the fitting body and the pressure plate.
5. The anti-theft device for the pressure bar of the oil pumping unit according to claim 1, wherein the lower limiting bulge and the upper limiting bulge are arranged around the anti-theft screw rod, and the lower limiting bulge abuts against the outer wall of the thread matching part.
6. The pumping unit pressure bar anti-theft device of claim 1, wherein the anti-theft lock mechanism further comprises a flexible gasket;
the flexible gasket is located between the top end of the anti-theft screw and the upper cover, and the flexible gasket abuts against the anti-theft screw and the upper cover.
7. The device according to any one of claims 1 to 6, wherein the anti-theft lock mechanism further comprises an upper cover locking assembly and an upper cover removing member;
the upper cover locking assembly comprises a locking ball and an elastic piece, a locking groove is formed in the side wall, facing the matching section, of the upper cover, a matching groove is formed in the matching section, the locking ball is in sliding fit with the locking groove and the matching groove, and the elastic piece is installed in the locking groove to provide elastic force towards the matching groove for the locking ball;
the upper cover-removing member is made of a magnetic material, and the upper cover-removing member is configured to magnetically attract the locking ball so that the locking ball moves in a direction away from the fitting groove.
8. The pumping unit pressure bar anti-theft device of claim 1, wherein a distance between the first nut and the pressure plate is smaller than a distance between the second nut and the first nut.
9. The anti-theft device for the pressure bar of the oil pumping unit according to claim 1, wherein a vibration damping opening is formed in a wall of the connecting mechanism cavity, which is far away from the pressure plate, the top end of the connecting screw rod is located in the connecting mechanism cavity, and the top end of the connecting screw rod is arranged corresponding to the vibration damping opening;
the second nut is located at the end of the connecting screw.
10. The pumping unit pressure bar anti-theft device according to claim 8 or 9, wherein the second nut is a locknut.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010658097.0A CN111794714A (en) | 2020-07-09 | 2020-07-09 | Lever anti-theft device is pressed to beam-pumping unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010658097.0A CN111794714A (en) | 2020-07-09 | 2020-07-09 | Lever anti-theft device is pressed to beam-pumping unit |
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| CN111794714A true CN111794714A (en) | 2020-10-20 |
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| CN202010658097.0A Pending CN111794714A (en) | 2020-07-09 | 2020-07-09 | Lever anti-theft device is pressed to beam-pumping unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022007670A1 (en) * | 2020-07-09 | 2022-01-13 | 三亚乾泰石油机械技术有限公司 | Anti-theft apparatus for oil pumping unit pressure lever |
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| CN202628043U (en) * | 2012-06-26 | 2012-12-26 | 王彪 | Anti-theft device for press lever of oil pumping unit |
| CN202659199U (en) * | 2012-06-27 | 2013-01-09 | 王彪 | Anti-theft device for oil producing wellhead |
| CN104653140A (en) * | 2015-03-11 | 2015-05-27 | 大庆金祥寓科技有限公司 | Wellhead anti-theft device |
| CN212225187U (en) * | 2020-07-09 | 2020-12-25 | 三亚乾泰石油机械技术有限公司 | Lever anti-theft device is pressed to beam-pumping unit |
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| CN202280441U (en) * | 2011-11-04 | 2012-06-20 | 中国石油化工股份有限公司胜利油田分公司海洋采油厂 | Anti-theft device of oil well bolt |
| CN202628043U (en) * | 2012-06-26 | 2012-12-26 | 王彪 | Anti-theft device for press lever of oil pumping unit |
| CN202659199U (en) * | 2012-06-27 | 2013-01-09 | 王彪 | Anti-theft device for oil producing wellhead |
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| WO2022007670A1 (en) * | 2020-07-09 | 2022-01-13 | 三亚乾泰石油机械技术有限公司 | Anti-theft apparatus for oil pumping unit pressure lever |
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