CN212509123U - Pumping unit and horse head pin thereof - Google Patents
Pumping unit and horse head pin thereof Download PDFInfo
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- CN212509123U CN212509123U CN202021056382.7U CN202021056382U CN212509123U CN 212509123 U CN212509123 U CN 212509123U CN 202021056382 U CN202021056382 U CN 202021056382U CN 212509123 U CN212509123 U CN 212509123U
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Abstract
The utility model relates to a beam-pumping unit and horse head round pin thereof. Horse head round pin of beam-pumping unit includes: the pin body is used for being assembled in a corresponding horse head pin hole and a corresponding walking beam pin hole of the oil pumping unit, the pin body comprises at least two expanding bodies, all the expanding bodies are arranged along the circumferential direction of the pin body to form a pin body through hole in a surrounding mode, the pin body through hole is a conical hole, or the pin body through hole is provided with a conical hole section; the pin shaft is arranged in the pin body through hole in a penetrating mode and comprises an upper thread section and a lower cone section which are arranged in the vertical direction, and the lower cone section is matched with the conical hole or the conical hole section; the conical hole or the conical hole section is of a structure with a small upper part and a big lower part; the horse head pin of beam-pumping unit still includes: and the fastening nut is in threaded connection with the upper threaded section, and when the fastening nut is screwed, the lower end surface of the fastening nut is pressed on the pin body or pressed on the pin body through the middle connecting piece so as to pull the pin shaft upwards and further force each expansion body to radially press the hole walls of the horse head pin hole and the walking beam pin hole along the pin body.
Description
Technical Field
The utility model relates to a beam-pumping unit and horse head round pin thereof.
Background
The horse head pin is a fastener for connecting the walking beam of the pumping unit and the horse head. At present, the horse head pin is generally wedged into a through hole formed by a walking beam pin hole and a horse head pin hole through a hammer so as to realize the fixed connection of the walking beam and the horse head. When the pumping unit works, the horsehead bears alternating load, so that abrasion is generated between the horsehead pin and the walking beam pin hole and between the horsehead pin hole, the horsehead is staggered, and the horsehead is not easy to detach.
The application publication number is CN101592175A, which discloses a horse head pin of an expanding and contracting type oil pumping unit, comprising a pin cover, a pin core and a common pin, wherein the center of the common pin is provided with a pin body taper hole, the pin body taper hole is of a structure with a small upper part and a big lower part, the common pin is formed by three sections, a gap is arranged between two adjacent sections, and the common pin forms a complete pin structure through a pin body reset spring in a pin body reset spring groove; the lower part of the pin core is provided with a cone which is matched with the taper hole of the pin body; the pin cover is sleeved in the middle of the pin core and is in threaded connection with the pin core; the upper portion of round pin core is equipped with the handle, when dismouting horse head pin, realizes rising and the decline of round pin core through the rotatory round pin core of handle, and then realizes the dismouting of horse head pin.
When the horse head pin is disassembled and assembled, the horse head pin is realized by rotating the pin core, but the friction force between the hole wall of the taper hole of the pin body and the outer peripheral surface of the pin core is overcome in the rotating process of the pin core, so that the disassembly and the assembly of the horse head pin are laborious.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a horsehead pin of a pumping unit, which solves the technical problem that the disassembly and the assembly of the horsehead pin in the prior art are more laborious; an object of the utility model is to provide a beam-pumping unit still to solve the comparatively hard technical problem of horse head round pin dismouting among the prior art.
In order to achieve the above object, the utility model discloses the technical scheme of horse head round pin of beam-pumping unit is:
horse head round pin of beam-pumping unit includes:
the pin body is used for being assembled in a corresponding horse head pin hole and a corresponding walking beam pin hole of the oil pumping unit, the pin body comprises at least two expanding bodies, all the expanding bodies are arranged along the circumferential direction of the pin body to form a pin body through hole in a surrounding mode, the pin body through hole is a conical hole, or the pin body through hole is provided with a conical hole section;
the pin shaft is arranged in the pin body through hole in a penetrating mode and comprises an upper thread section and a lower cone section which are arranged in the vertical direction, and the lower cone section is matched with the conical hole or the conical hole section;
the conical hole or the conical hole section is of a structure with a small upper part and a big lower part;
the horse head pin of beam-pumping unit still includes:
and the fastening nut is in threaded connection with the upper threaded section, and when the fastening nut is screwed, the lower end surface of the fastening nut is pressed on the pin body or pressed on the pin body through the middle connecting piece so as to pull the pin shaft upwards and further force each expansion body to radially press the hole walls of the horse head pin hole and the walking beam pin hole along the pin body.
The beneficial effects are that: the bolt shaft is pulled upwards by screwing the fastening nut, so that each expansion body is forced to radially press the horse head pin hole and the hole wall of the horse head pin hole along the bolt body, the fixed connection of the walking beam and the horse head is realized, the walking beam pin hole and the horse head pin hole are worn, the fastening of the walking beam and the horse head is ensured by regularly fastening the nut, and the vibration of the horse head in the up-and-down motion process is avoided; moreover, the expansion of each expansion body is realized by rotating the fastening nut, and the friction force between the pin shaft and each expansion body is not required to be overcome, so that the assembly and disassembly of the horse head pin are labor-saving, and the labor intensity is reduced.
Furthermore, the lower end face of the fastening nut is pressed against the pin body through an intermediate connecting piece, a guide structure extending along the radial direction of the pin body is arranged on the intermediate connecting piece, the guide structures correspond to the expansion bodies one to one, and the guide structures are used for guiding the expansion bodies when the expansion bodies expand along the radial direction of the pin body.
The beneficial effects are that: the guide structure is arranged on the connecting plate to guide the expansion body, so that the smoothness of the expansion body during expansion is ensured.
Furthermore, the guide structure is a guide long hole, a screw is connected to the expansion body in a threaded manner, and a rod part of the screw slides along the radial direction of the pin body in the guide long hole, so that the expansion body is guided.
The beneficial effects are that: the design can realize the direction to the expansion body like this, can be with the expansion body again and connect on the connecting plate, the carrying and the dismouting of the horse head round pin of being convenient for.
Furthermore, the guide long hole is a step hole, and the head of the screw is located on the step surface of the step hole.
The beneficial effects are that: the head of the screw is designed to be not exposed, so that the head of the screw is prevented from interfering with a tool for operating the fastening nut, and the head of the screw looks beautiful.
Furthermore, a sealing ring groove is formed in the peripheral surface of the pin body, and an annular sealing ring is placed in the sealing ring groove.
The beneficial effects are that: preventing impurities and rain water from entering and corroding the pin holes.
Furthermore, the number of the sealing ring grooves is three, and the three sealing ring grooves are used for respectively corresponding to an upper orifice of the mule head pin hole, a lower orifice of the walking beam pin hole and a butt joint of the mule head pin hole and the walking beam pin hole.
The beneficial effects are that: further preventing impurities and rain water from entering and corroding the pin holes.
Furthermore, the pin shaft is provided with a lubricating oil hole and an oil outlet, the lubricating oil hole extends along the axial direction of the pin shaft, the oil outlet extends along the radial direction of the pin shaft, and the lubricating oil hole is communicated with the oil outlet.
The beneficial effects are that: by the design, the pin shaft, the horse head pin hole and the walking beam pin hole can be lubricated by lubricating oil, so that rusting is avoided, and the horse head pin can be conveniently disassembled and assembled.
Furthermore, the pin shaft further comprises an oil storage rod section, the oil storage rod section is located between the upper thread section and the lower cone section and is arranged corresponding to the oil outlet hole, and an annular oil cavity is formed by the pin body and the oil storage rod section in a surrounding mode.
The beneficial effects are that: the annular oil chamber can store certain oil to improve the lubricating effect.
Further, the number of the expansion bodies is three.
In order to achieve the above object, the technical scheme of the pumping unit of the utility model is that:
the oil pumping unit comprises a walking beam and a horse head, wherein the walking beam and the horse head are fixedly connected through a horse head pin;
the horse head pin includes:
the pin body is used for being assembled in a corresponding horse head pin hole and a corresponding walking beam pin hole of the oil pumping unit, the pin body comprises at least two expanding bodies, all the expanding bodies are arranged along the circumferential direction of the pin body to form a pin body through hole in a surrounding mode, the pin body through hole is a conical hole, or the pin body through hole is provided with a conical hole section;
the pin shaft is arranged in the pin body through hole in a penetrating mode and comprises an upper thread section and a lower cone section which are arranged in the vertical direction, and the lower cone section is matched with the conical hole or the conical hole section;
the conical hole or the conical hole section is of a structure with a small upper part and a big lower part;
the horse head pin of beam-pumping unit still includes:
and the fastening nut is in threaded connection with the upper threaded section, and when the fastening nut is screwed, the lower end surface of the fastening nut is pressed on the pin body or pressed on the pin body through the middle connecting piece so as to pull the pin shaft upwards and further force each expansion body to radially press the hole walls of the horse head pin hole and the walking beam pin hole along the pin body.
The beneficial effects are that: the bolt shaft is pulled upwards by screwing the fastening nut, so that each expansion body is forced to radially press the horse head pin hole and the hole wall of the horse head pin hole along the bolt body, the fixed connection of the walking beam and the horse head is realized, the walking beam pin hole and the horse head pin hole are worn, the fastening of the walking beam and the horse head is ensured by regularly fastening the nut, and the vibration of the horse head in the up-and-down motion process is avoided; moreover, the expansion of each expansion body is realized by rotating the fastening nut, and the friction force between the pin shaft and each expansion body is not required to be overcome, so that the assembly and disassembly of the horse head pin are labor-saving, and the labor intensity is reduced.
Furthermore, the lower end face of the fastening nut is pressed against the pin body through an intermediate connecting piece, a guide structure extending along the radial direction of the pin body is arranged on the intermediate connecting piece, the guide structures correspond to the expansion bodies one to one, and the guide structures are used for guiding the expansion bodies when the expansion bodies expand along the radial direction of the pin body.
The beneficial effects are that: the guide structure is arranged on the connecting plate to guide the expansion body, so that the smoothness of the expansion body during expansion is ensured.
Furthermore, the guide structure is a guide long hole, a screw is connected to the expansion body in a threaded manner, and a rod part of the screw slides along the radial direction of the pin body in the guide long hole, so that the expansion body is guided.
The beneficial effects are that: the design can realize the direction to the expansion body like this, can be with the expansion body again and connect on the connecting plate, the carrying and the dismouting of the horse head round pin of being convenient for.
Furthermore, the guide long hole is a step hole, and the head of the screw is located on the step surface of the step hole.
The beneficial effects are that: the head of the screw is designed to be not exposed, so that the head of the screw is prevented from interfering with a tool for operating the fastening nut, and the head of the screw looks beautiful.
Furthermore, a sealing ring groove is formed in the peripheral surface of the pin body, and an annular sealing ring is placed in the sealing ring groove.
The beneficial effects are that: preventing impurities and rain water from entering and corroding the pin holes.
Furthermore, the number of the sealing ring grooves is three, and the three sealing ring grooves are used for respectively corresponding to an upper orifice of the mule head pin hole, a lower orifice of the walking beam pin hole and a butt joint of the mule head pin hole and the walking beam pin hole.
The beneficial effects are that: further preventing impurities and rain water from entering and corroding the pin holes.
Furthermore, the pin shaft is provided with a lubricating oil hole and an oil outlet, the lubricating oil hole extends along the axial direction of the pin shaft, the oil outlet extends along the radial direction of the pin shaft, and the lubricating oil hole is communicated with the oil outlet.
The beneficial effects are that: by the design, the pin shaft, the horse head pin hole and the walking beam pin hole can be lubricated by lubricating oil, so that rusting is avoided, and the horse head pin can be conveniently disassembled and assembled.
Furthermore, the pin shaft further comprises an oil storage rod section, the oil storage rod section is located between the upper thread section and the lower cone section and is arranged corresponding to the oil outlet hole, and an annular oil cavity is formed by the pin body and the oil storage rod section in a surrounding mode.
The beneficial effects are that: the annular oil chamber can store certain oil to improve the lubricating effect.
Further, the number of the expansion bodies is three.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment 1 of a horse head pin of the pumping unit of the present invention;
FIG. 2 is a schematic structural view of the horse head pin in FIG. 1 inserted into the horse head pin hole and the walking beam pin hole;
FIG. 3 is a schematic view of the structure in the direction A-A in FIG. 1;
FIG. 4 is a schematic structural view of an expansion body of the pin body of FIG. 1;
FIG. 5 is a top view of FIG. 4;
in the figure: 1-a pin shaft; 2-fastening a nut; 3-connecting the plates; 4-blocking eaves; 5-sealing ring grooves; 6-a pin body; 7-donkey head pin hole; 8-walking beam pin holes; 9-ring seal ring; 10-stop holes; 11-lubricating oil holes; 12-a guide slot; 13-a screw; 14-oil outlet holes; 15-a threaded hole; 16-an annular oil chamber; 17-dilators.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. Furthermore, the terms "upper" and "lower" are based on the orientation and positional relationship shown in the drawings and are only for convenience of description of the present invention, and do not indicate that the referred device or component must have a specific orientation, and thus, should not be construed as limiting the present invention.
The features and properties of the present invention are described in further detail below with reference to examples.
The utility model discloses specific embodiment 1 of horse head round pin of beam-pumping unit:
as shown in fig. 1 and 4, the horsehead pin of the pumping unit comprises a pin body 6 and a pin shaft 1, wherein the pin body 6 is formed by trisection expansion bodies 17 cut by a circular pipe, the structures and the sizes of the expansion bodies 17 are the same, and the outer diameter of the circular pipe is slightly smaller than the inner diameters of the horsehead pin hole 7 and the walking beam pin hole 8 so as to facilitate the disassembly and the assembly of the pin body 6; the three-petal expansion body 17 is arranged along the circumferential direction of the pin body 6, each expansion body 17 is enclosed to form a pin body through hole, a gap is formed between every two adjacent petal expansion bodies 17, and the pin body through holes are tapered holes with small upper parts and large lower parts. In other embodiments, the number of the expansion bodies can be set according to requirements, such as two, more than four.
As shown in fig. 2, the pin 1 is inserted into the pin through hole defined by each expansion body 17, the pin 1 includes an upper thread section at the upper part and a lower cone section at the lower part, the lower cone section is of a structure with a small upper part and a large lower part, and the conical surface of the lower cone section is matched with the conical surface of the conical hole.
In this embodiment, a fastening nut 2 is threadedly connected to the upper threaded section of the pin 1, a connecting plate 3 is disposed between the fastening nut 2 and the pin body 6, and when the fastening nut 2 rotates, the lower end surface of the fastening nut 2 is pressed against the pin body 6 through the connecting plate 3, so that the pin 1 presses against the expansion bodies 17 of the pin body 6 along the radial direction of the pin body 6 through conical surface matching, thereby expanding the expansion bodies 17. Wherein the connection plate 3 constitutes an intermediate connection.
As shown in fig. 2 and 3, three guide long holes 12 are formed in the connecting plate 3, the three guide long holes 12 are uniformly distributed along the circumference of the pin shaft 1, the three guide long holes 12 correspond to the three-petal expansion bodies 17 one by one, and the guide long holes 12 form a guide structure. As shown in fig. 5, a threaded hole 15 is provided on the upper end surface of the expansion body 17, the screw 13 passes through the guiding long hole 12 and is screwed in the threaded hole 15 on the expansion body 17, the rod part of the screw 13 is guided and slides along the radial direction of the pin body 6 through the guiding long hole 12, so as to realize the guiding of the corresponding expansion body 17, and moreover, the three expansion bodies 17 are all connected on the connecting plate 3 through the corresponding screws 13, so that the carrying and dismounting of the horse head pin are convenient.
In this embodiment, the long guide hole 12 is a stepped hole, and the head of the screw 13 is located on the stepped surface of the stepped hole, so that the head of the screw 13 is designed not to be exposed, thereby not only preventing the head of the screw 13 from interfering with a tool for operating the fastening nut 2, but also being beautiful.
As shown in fig. 2 and 4, the upper portion of each expansion body 17 is provided with a blocking eave 4, and the blocking eave 4 is used for supporting at the hole edge of the mule head pin hole 7 to block and limit the expansion body 17.
In this embodiment, a sealing ring groove 5 is provided on the outer peripheral surface of the pin body 6, and an annular sealing ring 9 is provided in the sealing ring groove 5. Specifically, the number of the sealing ring grooves 5 is three, and the sealing ring groove 5 at the upper part is arranged corresponding to an upper orifice of the horsehead pin hole 7 so as to prevent impurities and rainwater from entering from the upper part and corroding the pin hole; the middle sealing ring groove 5 is arranged corresponding to the butt joint position of the horse head pin hole 7 and the walking beam pin hole 8 so as to prevent impurities and rainwater from entering from the middle and corroding the pin holes; the sealing ring groove 5 at the lower part is arranged corresponding to the lower orifice of the walking beam pin hole 8 to prevent impurities and rainwater from entering from the lower part and corroding the pin hole.
In this embodiment, because ring packing 9 has certain elasticity, consequently, ring packing 9 has certain effect of cramping to the expansion body 17, and when round pin axle 1 did not exert the effort to the expansion body 17, ring packing 9 cramps three expansion body 17 together to avoid the relative movement between the expansion body 17, the dismouting of the horse head round pin of being convenient for.
As shown in fig. 2, the pin shaft 1 is provided with a lubricating oil hole 11 and an oil outlet 14, the lubricating oil hole 11 extends along the axial direction of the pin shaft 1, the oil outlet 14 extends along the radial direction of the pin shaft 1, the lubricating oil hole 11 is communicated with the oil outlet 14, and the lubricating oil flowing out through the oil outlet 14 can lubricate the lower cone section of the pin shaft 1, the horse head pin hole 7 and the walking beam pin hole 8. Wherein, the oil outlet hole 14 is provided with one to reduce the drilling process.
In this embodiment, the pin shaft 1 further includes an oil storage rod section, the oil storage rod section is located between the upper thread section and the lower cone section and is disposed at a position corresponding to the oil outlet 14, an annular oil chamber 16 is defined between the pin body 6 and the oil storage rod section, the annular oil chamber 16 is rapidly filled with lubricating oil flowing out of the oil outlet 14, and then the lubricating oil enters between each expansion body 17 and the corresponding pin hole through a corresponding gap, and the annular oil chamber 16 can store certain oil to improve the lubricating effect.
In this embodiment, the top of the pin shaft 1 is provided with a stop hole 10, the stop hole 10 extends along the radial direction of the pin shaft 1, and a steel bar with a certain length is inserted into the stop hole 10, so as to prevent the pin shaft 1 from rotating along with the fastening nut 2 when the fastening nut is rotated.
During assembly, the horse head pin is sequentially inserted into the horse head pin hole 7 and the walking beam pin hole 8 from top to bottom until the blocking eave 4 on the expansion body 17 is supported on the hole edge of the horse head pin hole 7; then, the fastening nut 2 is screwed to enable the pin shaft 1 to move upwards relative to the pin body 6, in order to avoid the pin shaft 1 rotating along with the fastening nut 2, a steel bar penetrates through the blocking hole 10 of the pin shaft 1, and one end of the steel bar is blocked; because the lower cone section of the pin shaft 1 is in conical surface fit with the conical hole of the pin body 6, when the pin shaft 1 moves upwards, the expansion body 17 expands outwards along the radial direction of the pin shaft 1 to press the hole walls of the horse head pin hole 7 and the walking beam pin hole 8, and the walking beam is fixedly connected with the horse head. When the horse head pin needs to be disassembled, the fastening nut 2 is unscrewed. It should be noted that the upper and lower parts in this embodiment are opposite to each other, and the positional relationship of each part is only for convenience of description, and in other embodiments, the horse head pin may be inserted into the horse head pin hole and the walking beam pin hole in sequence from bottom to top.
Wherein, the annular seal ring 9 of upper portion seals the last drill way of horse head pinhole 7, and the annular seal ring 9 of middle part seals the butt joint department of horse head pinhole 7 and walking beam pinhole 8, and the annular seal ring 9 of lower part seals the lower drill way of walking beam pinhole 8 to prevent impurity and rainwater entering and corroding the pinhole.
The utility model discloses specific embodiment 2 of horse head round pin of beam-pumping unit:
the difference from embodiment 1 is that in embodiment 1, a connecting plate 3 is arranged between the fastening nut 2 and the pin body 6, and when the fastening nut 2 rotates, the lower end face of the fastening nut 2 is pressed against the pin body 6 through the connecting plate 3 to realize that the pin shaft 1 moves upward relative to the pin body 6.
The utility model discloses specific embodiment 3 of horse head round pin of beam-pumping unit:
the difference from the specific embodiment 1 is that in embodiment 1, the guide structure is a long guide hole 12, the long guide hole 12 extends along the radial direction of the pin body 6, the screw 13 is connected to the expansion body 17 in a threaded manner, and the long guide hole 12 allows the rod portion of the screw 13 to slide along the radial direction of the pin body 6 to guide the expansion body 17.
In other embodiments, the guide structure is a guide sliding block, the upper end face of the expansion body is provided with a guide sliding groove, the guide sliding groove extends along the radial direction of the pin body, and the guide sliding block slides in the guide sliding groove along the radial direction of the pin body so as to guide the expansion body.
The utility model discloses specific embodiment 4 of horse head round pin of beam-pumping unit:
the difference from the specific embodiment 1 is that, in the embodiment 1, the number of the sealing ring grooves 5 is three, the three sealing ring grooves 5 are used for respectively corresponding to an upper orifice of the mule head pin hole 7, a lower orifice of the walking beam pin hole 8 and a butt joint of the mule head pin hole 7 and the walking beam pin hole 8 so as to prevent impurities and rainwater from entering and corroding the pin holes, and in the embodiment, a sealing ring is arranged between a butt joint surface of the mule head and the walking beam, so that the number of the sealing ring grooves is two, and the two sealing ring grooves respectively correspond to the upper orifice of the mule head pin hole and the lower orifice of the walking beam pin hole so as to prevent impurities and rainwater from entering and corroding the pin holes.
The utility model discloses specific embodiment 5 of horse head round pin of beam-pumping unit:
the difference with embodiment 1 lies in, in embodiment 1, the intermediate junction spare is connecting plate 3, is equipped with the direction slot hole on the connecting plate 3 to the realization is to the direction of corresponding expansion body 17, and in this embodiment, the intermediate junction spare is the link, and the link includes the ring, is equipped with the bar board in the ring, and the quantity of bar board is three, and the contained angle between two adjacent bar boards is 120, is equipped with the direction slot hole along the radial extension of round pin axle on each bar board, in order to realize the direction to corresponding expansion body.
The utility model discloses specific embodiment 6 of horse head round pin of beam-pumping unit:
the difference from embodiment 1 is that in embodiment 1, a fastening nut is screwed on the threaded section of the pin 1, and in this embodiment, a back nut is screwed on the threaded section of the pin 1 above the fastening nut to prevent the fastening nut from loosening.
The utility model discloses specific embodiment of beam-pumping unit, beam-pumping unit in this embodiment include walking beam and horse head, and walking beam and horse head pass through horse head round pin fixed connection, this horse head round pin and any in specific embodiment 1 to 6 of the horse head round pin of above-mentioned beam-pumping unit the structure the same, no longer describe here.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Horse head round pin of beam-pumping unit includes:
the pin body is used for being assembled in a corresponding horse head pin hole and a corresponding walking beam pin hole of the oil pumping unit, the pin body comprises at least two expanding bodies, all the expanding bodies are arranged along the circumferential direction of the pin body to form a pin body through hole in a surrounding mode, the pin body through hole is a conical hole, or the pin body through hole is provided with a conical hole section;
the pin shaft is arranged in the pin body through hole in a penetrating mode and comprises an upper thread section and a lower cone section which are arranged in the vertical direction, and the lower cone section is matched with the conical hole or the conical hole section;
the device is characterized in that the conical hole or the conical hole section is of a structure with a small upper part and a big lower part;
the horse head pin of beam-pumping unit still includes:
and the fastening nut is in threaded connection with the upper threaded section, and when the fastening nut is screwed, the lower end surface of the fastening nut is pressed on the pin body or pressed on the pin body through the middle connecting piece so as to pull the pin shaft upwards and further force each expansion body to radially press the hole walls of the horse head pin hole and the walking beam pin hole along the pin body.
2. The horsehead pin of a pumping unit according to claim 1, characterized in that the lower end face of the fastening nut is pressed against the pin body through an intermediate connecting member, the intermediate connecting member is provided with a guiding structure extending along the pin body in a radial direction, the guiding structure corresponds to the expansion body one to one, and the guiding structure is used for guiding the expansion body when the expansion body expands along the pin body in the radial direction.
3. The horsehead pin of a pumping unit according to claim 2, wherein the guiding structure is a guiding long hole, a screw is screwed on the expansion body, and the guiding long hole is used for guiding and sliding a rod part of the screw along the radial direction of the pin body so as to guide the expansion body.
4. The horse head pin of the oil pumping unit according to claim 3, wherein the guide long hole is a stepped hole, and the head of the screw is positioned on a stepped surface of the stepped hole.
5. The horse head pin of the pumping unit according to any one of claims 1 to 4, wherein a sealing ring groove is provided on the outer circumferential surface of the pin body, and an annular sealing ring is placed in the sealing ring groove.
6. The horse head pin of the pumping unit according to claim 5, wherein the number of the sealing ring grooves is three, and the three sealing ring grooves are respectively corresponding to an upper orifice of the horse head pin hole, a lower orifice of the walking beam pin hole and a butt joint of the horse head pin hole and the walking beam pin hole.
7. The horse head pin of the pumping unit according to any one of claims 1 to 4, wherein the pin shaft is provided with a lubrication hole and an oil outlet hole, the lubrication hole extends in an axial direction of the pin shaft, the oil outlet hole extends in a radial direction of the pin shaft, and the lubrication hole is communicated with the oil outlet hole.
8. The horsehead pin of a pumping unit according to claim 7, wherein the pin further comprises a fuel rod section, the fuel rod section is located between the upper thread section and the lower cone section and is arranged corresponding to the position of the oil outlet hole, and an annular oil cavity is defined between the pin body and the fuel rod section.
9. The horse head pin of a pumping unit according to any one of claims 1 to 4, wherein the number of the expansion bodies is three petals.
10. A pumping unit comprising a walking beam and a horse head fixedly connected by a horse head pin, characterized in that said horse head pin is the horse head pin according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021056382.7U CN212509123U (en) | 2020-06-10 | 2020-06-10 | Pumping unit and horse head pin thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021056382.7U CN212509123U (en) | 2020-06-10 | 2020-06-10 | Pumping unit and horse head pin thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212509123U true CN212509123U (en) | 2021-02-09 |
Family
ID=74395530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021056382.7U Active CN212509123U (en) | 2020-06-10 | 2020-06-10 | Pumping unit and horse head pin thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212509123U (en) |
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2020
- 2020-06-10 CN CN202021056382.7U patent/CN212509123U/en active Active
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