CN112780231A - Centering method and sizing block for centering mule head of beam pumping unit - Google Patents
Centering method and sizing block for centering mule head of beam pumping unit Download PDFInfo
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- CN112780231A CN112780231A CN201911086957.1A CN201911086957A CN112780231A CN 112780231 A CN112780231 A CN 112780231A CN 201911086957 A CN201911086957 A CN 201911086957A CN 112780231 A CN112780231 A CN 112780231A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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Abstract
The invention discloses a centering method and a sizing block for centering a horsehead of a beam pumping unit, and belongs to the technical field of oil extraction in oil fields. The method comprises the following steps: measuring the offset distance of the hair braid; measuring the centering length of the hair braid; measuring the width of the walking beam; providing a sizing block, wherein the thickness of the sizing block is determined by the offset distance of the hair braid, the centering length of the hair braid and the width of the walking beam; the position of the walking beam relative to the horizontal plane is corrected through the sizing block. According to the method, the thickness of the sizing block is calculated, and the sizing block is inserted between the walking beam and the middle shaft, so that the hair braid is aligned with the horse head, and the adjusting efficiency of the alignment of the horse head is greatly improved.
Description
Technical Field
The disclosure belongs to the technical field of oil extraction in oil fields, and particularly relates to a centering method and a sizing block for centering a horsehead of a beam pumping unit.
Background
The walking beam type oil pumping machine is an important device in oil field oil production equipment, and its working principle is that the transmission of motor is changed into the up-and-down movement of horsehead by means of speed-changing box and crank-connecting rod mechanism, and the horsehead can be passed through hair braid, polished rod and oil pumping rod to drive plunger of underground oil pumping pump to make up-and-down movement so as to continuously pump crude oil from oil well.
The horsehead needs to be guaranteed to be centered on a wellhead in the working process of the beam pumping unit so as to prevent a hair braid from wearing the horsehead in the working process. In the related art, the method for adjusting the horsehead centering wellhead comprises the steps that jackscrews are arranged on two sides of the horsehead, the horsehead is driven to move through the jackscrews, so that the horsehead centering wellhead is enabled, a hair braid can be arranged on the horsehead in the middle, and the horsehead cannot be abraded
However, the jackscrew is easily rusted when being exposed to outdoor environment all the year round, so that the centering failure of the horse head is easily caused, and the centering adjustment efficiency of the horse head is low.
Disclosure of Invention
The embodiment of the disclosure provides a centering method and a sizing block for centering a horse head of a beam pumping unit, which can greatly improve the centering adjustment efficiency of the horse head. The technical scheme is as follows:
in a first aspect, an embodiment of the present disclosure provides a centering method for centering a mule head of a beam pumping unit, where the centering method includes:
measuring the offset distance of the hair braid, wherein the offset distance of the hair braid is the shortest distance between the abrasion position of the hair braid and the centering position of the hair braid;
measuring the centering length of the hair braid, wherein the centering length of the hair braid is the shortest distance from the fixing position of the hair braid to the abrasion position of the hair braid in the centering direction of the hair braid;
measuring the width of a walking beam, wherein the width of the walking beam is the shortest distance between two opposite side edges of the walking beam on a horizontal plane;
providing a sizing block, wherein the thickness of the sizing block is determined by the offset distance of the hair plait, the centering length of the hair plait and the width of the walking beam, and the thickness of the sizing block is the length of the sizing block in the direction vertical to the horizontal direction;
and correcting the position of the walking beam relative to the horizontal plane through the sizing block.
Optionally, the determining the thickness of the parallels through the offset distance of the hair braid, the centering length of the hair braid and the width of the walking beam includes:
and calculating the thickness of the sizing block to be equal to the product of the ratio of the offset distance of the hair braid to the centering length of the hair braid and the width of the walking beam, and taking the product as the thickness of the sizing block.
Optionally, the correcting the position of the walking beam relative to the horizontal plane by the sizing block includes:
disengaging a polished rod eye from a first side catch connected to the polished rod eye;
loosening a fixing bolt for connecting the middle shaft and the walking beam;
and installing the sizing block pad between the walking beam and the central shaft.
Optionally, before the disconnecting the rope hanger from the first side catch connected to the rope hanger, the centering method further comprises:
stopping the rope hanger at a lowest position reached by the rope hanger.
Optionally, after the correcting the position of the walking beam relative to the horizontal plane by the sizing block, the centering method further includes:
and coating an anticorrosive layer on the sizing block.
In a second aspect, the disclosed embodiment provides a sizing block for centering a horse head of a beam pumping unit, the sizing block comprises an adjusting part and an adjusting seat, the adjusting part comprises an adjusting rod and a supporting block, one end of the adjusting rod is fixed on the supporting block, and the other end of the adjusting rod is slidably inserted into the adjusting seat.
Optionally, a rotatable ejector rod is inserted into the side wall of the adjusting seat, the extending direction of the ejector rod is perpendicular to the extending direction of the adjusting rod, driving teeth are arranged on the outer peripheral wall of the ejector rod, driven teeth are arranged on the outer wall of the adjusting rod along the extending direction of the adjusting rod, and the driving teeth are meshed with the driven teeth.
Optionally, one end of the ejector rod, which is far away from the adjusting rod, is provided with a rotating handle.
Optionally, a locking rod is further inserted into the side wall of the adjusting seat, a plurality of through holes are formed in the adjusting rod and are axially arranged along the adjusting rod, and the through holes are used for inserting the locking rod.
Optionally, the end surface of the adjusting seat facing away from the adjusting part is provided with a gasket.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
when the donkey head is centered by the centering method provided by the embodiment of the disclosure, the walking beam and the donkey head are integrated, so that the inclination angle of the donkey head is equal to the inclination angle (relative to the horizontal plane) of the walking beam before and after the donkey head is centered. In addition, the hair plaits are arranged vertically to the ground all the time, so that the inclination angles of the front hair plaits and the rear hair plaits in the donkey head pair are equal to the inclination angle of the donkey head, and the inclination angles of the front hair plaits and the rear hair plaits in the donkey head pair are equal to the inclination angle of the walking beam. Therefore, the adjustment of the inclination angle of the horse head and the inclination angle of the hair braid can be realized by adjusting the inclination angle of the walking beam. In operation, first, the offset distance of the hair braid, the centering length of the hair braid, and the width of the walking beam are measured, respectively. Then, the thickness of the sizing block is determined through the offset distance of the hair braid, the centering length of the hair braid and the width of the walking beam, and the inclination angle adjustment amount of the walking beam is determined. And finally, correcting the position of the walking beam relative to the horizontal plane through a sizing block to realize the centering of the horse head. That is to say, this disclosure is through measuring the offset distance of hair pigtail, the centering length of hair pigtail and the width of walking beam, these three parameters that obtain of easily measuring, calculate the thickness that obtains the parallels, fill up the walking beam with the parallels of this thickness and establish, can realize the centering of horse head, and need not to use instrument such as jackscrew to adjust the location to the horse head, so avoided because of jackscrew corrosion, and lead to the problem of centering failure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flowchart of a method for centering a mule head of a beam pumping unit according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of another method for centering a mule head of a walking beam pumping unit according to an embodiment of the present disclosure;
FIG. 3 is a schematic illustration of an offset for a hair braid provided by embodiments of the present disclosure;
FIG. 4 is a schematic illustration of an offset of a walking beam provided by an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of a beam-pumping unit according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram illustrating the use of a sizing block provided by an embodiment of the present disclosure;
fig. 7 is a cross-sectional view of a back iron for centering a horse head of a walking beam pumping unit according to an embodiment of the present disclosure.
The symbols in the drawings represent the following meanings:
1. sizing block; 11. an adjustment member; 111. adjusting a rod; 1111. a driven tooth; 1112. a through hole; 112. a support block; 12. cushion blocks; 121. a top rod; 1211. a driving tooth; 1212. rotating the handle; 122. a locking lever; 123. a gasket; 100. a hair braid; 200. a walking beam; 300. a rope hanger; 400. a first square clip; 500. a middle shaft; 600. fixing the bolt; 700. a donkey head; 800. a blowout prevention box; 900. a second square clip; a. an offset distance; b. centering length; c. a width; d. and (4) thickness.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for centering a mule head of a walking beam pumping unit according to an embodiment of the present disclosure, where as shown in fig. 1, the centering method includes:
s101, measuring the offset distance a of the hair braid 100.
In step S101, the offset distance a of the hair braid 100 is the shortest distance between the worn position of the hair braid 100 and the centering position of the hair braid 100.
And S102, measuring the centering length b of the hair braid 100.
In step S102, the centering length b of the hair braid 100 is the shortest distance from the fixing position of the hair braid 100 to the worn position of the hair braid 100 in the centering direction of the hair braid 100.
And S103, measuring the width c of the walking beam 200.
In step S103, the width c of the walking beam 200 is the shortest distance between two opposite sides of the walking beam 200 on the horizontal plane.
And S104, providing the sizing block 1, wherein the thickness d of the sizing block 1 is determined by the offset distance a of the hair plait 100, the centering length b of the hair plait 100 and the width c of the walking beam 200.
In step S104, the thickness d of the sizing block 1 is the length of the sizing block 1 in the direction perpendicular to the horizontal direction.
And S105, correcting the position of the walking beam 200 relative to the horizontal plane through the sizing block 1.
When the donkey head is centered by the centering method provided by the embodiment of the disclosure, the walking beam and the donkey head are integrated, so that the inclination angle of the donkey head is equal to the inclination angle (relative to the horizontal plane) of the walking beam before and after the donkey head is centered. In addition, the hair plaits are arranged vertically to the ground all the time, so that the inclination angles of the front hair plaits and the rear hair plaits in the donkey head pair are equal to the inclination angle of the donkey head, and the inclination angles of the front hair plaits and the rear hair plaits in the donkey head pair are equal to the inclination angle of the walking beam. Therefore, the adjustment of the inclination angle of the horse head and the inclination angle of the hair braid can be realized by adjusting the inclination angle of the walking beam. In operation, first, the offset distance of the hair braid, the centering length of the hair braid, and the width of the walking beam are measured, respectively. Then, the thickness of the sizing block is determined through the offset distance of the hair braid, the centering length of the hair braid and the width of the walking beam, and the inclination angle adjustment amount of the walking beam is determined. And finally, correcting the position of the walking beam relative to the horizontal plane through a sizing block to realize the centering of the horse head. That is to say, this disclosure is through measuring the offset distance of hair pigtail, the centering length of hair pigtail and the width of walking beam, these three parameters that obtain of easily measuring, calculate the thickness that obtains the parallels, fill up the walking beam with the parallels of this thickness and establish, can realize the centering of horse head, and need not to use instrument such as jackscrew to adjust the location to the horse head, so avoided because of jackscrew corrosion, and lead to the problem of centering failure.
Fig. 2 is a flowchart of another method for centering a mule head of a walking beam pumping unit according to an embodiment of the present disclosure, where as shown in fig. 2, the centering method includes:
and S201, measuring the offset distance a of the hair braid 100 (see figure 3).
In step S201, the offset distance a of the hair braid 100 is the shortest distance between the worn position of the hair braid 100 and the centering position of the hair braid 100.
S202, measuring the centering length b of the hair braid 100 (see figure 3).
In step S202, the centering length b of the hair braid 100 is the shortest distance from the fixing position of the hair braid 100 to the worn position of the hair braid 100 in the centering direction of the hair braid 100.
FIG. 3 is a schematic diagram of the displacement of a hair braid provided by an embodiment of the present disclosure, as shown in FIG. 3, line l1Because the hair plait 100 is at the position when the horsehead 700 is inclined and the hair plait 100 is deflected under the action of gravity, the horsehead 700 is worn by the hair plait 100 at this time, and the inclination angle of the hair plait 100 is x. The horse head 700 is adjusted to center the horse head 700, so that the hair braid 100 is re-centered on the horse head 700 under the action of gravity, namely the position of the hair braid 100 is a straight line l2At this time, the ponytail 100 does not wear the horse head 700.
S203, measuring the width c of the walking beam 200 (see fig. 4).
In step S203, the width c of the walking beam 200 is the shortest distance between two opposite sides of the walking beam 200 on the horizontal plane.
And S204, providing a sizing block 1, and calculating the thickness d of the sizing block 1 to be equal to the product of the ratio of the offset distance a of the hair braid 100 to the centering length b of the hair braid 100 and the width c of the walking beam 200 as the thickness d of the sizing block 1 (see figure 4).
In the above embodiment, since the inclination angle of the horse head 700 is equal to the inclination angle y of the walking beam 200, and the inclination angle of the horse head 700 is equal to the inclination angle x of the hair braid 100, the inclination angle x of the hair braid 100 is equal to the inclination angle y of the walking beam 200. The lengths of the two right-angled sides of the right-angled triangle formed by the inclination angle x of the hair braid 100 are respectively the offset distance a of the hair braid 100 and the centering length b of the hair braid 100 (see fig. 3), the lengths of the two right-angled sides of the right-angled triangle formed by the inclination angle y of the walking beam 200 are respectively the thickness d of the sizing block 1 and the width c of the walking beam 200 (see fig. 4), and the thickness d of the sizing block 1 can be calculated according to the similarity a/b of the triangles, which is c/d. That is, by measuring the offset distance a of the hair braid 100, the centering length b of the hair braid 100, and the width c of the walking beam 200, the thickness d of the desired parallels 1 can be quickly calculated.
FIG. 4 is a schematic diagram of the deflection of a walking beam according to an embodiment of the present disclosure, as shown in FIG. 4, a straight line l3Line l is the position of the walking beam 200 relative to the horizontal plane when the horse head 700 is deflected4The inclination angle of the walking beam 200 is y for the position of the walking beam 200 with respect to the horizontal plane when the horse head 700 is centered. The position of the walking beam 200 is formed by a straight line l through the use of a sizing block 13Is adjusted to l4So that the walking beam 200 drives the horse head 700 to deflect, thereby realizing that the position of the hair braid 100 is formed by a straight line l1Becomes a straight line l2。
S205, stop the rope hanger 300 at the lowest position reached by the rope hanger 300.
In the above embodiment, stopping the rope hanger 300 at the lowest position of the rope hanger 300 facilitates the manual operation and avoids working high above the ground.
It should be noted that the lowest position reached by the rope hanger 300 is the lowest position at which the rope hanger 300 is located during the movement of the rope hanger 300.
S206, the hanger 300 is detached from the first side hook 400 connected to the hanger 300 (see fig. 5).
It should be noted that, when the first square hook 400 connecting the rope hanger 300 and the rope hanger 300 is disengaged, the second square hook 900 should be provided on the blowout preventer 800, so as to facilitate the disengagement of the rope hanger 300 and the first square hook 400.
S207, loosening the fixing bolt 600 for connecting the middle shaft 500 and the walking beam 200.
In the above embodiment, the fixing bolt 600 of the center shaft 500 is loosened to facilitate the subsequent clamping of the sizing block 1 between the walking beam 200 and the center shaft 500.
And S208, mounting the sizing block 1 between the walking beam 200 and the central shaft 500.
Fig. 6 is a schematic use view of a sizing block provided in the embodiment of the present disclosure, and as shown in fig. 6, the sizing block 1 is sandwiched between the walking beam 200 and the central shaft 500.
It should be noted that the sizing block 1 should be placed on the side where the walking beam 200 is inclined. In addition, after the arrangement of the sizing block 1 is completed, the polished rod eye 300 is moved into the first square hook 400, and then the second square hook 900 on the blowout preventer 800 is removed, thereby completing the installation of the sizing block 1.
S209, coating a corrosion-resistant layer on the sizing block 1.
In the above embodiment, the corrosion-resistant layer is disposed on the sizing block 1 to prevent the corrosion rate of the sizing block 1 under natural conditions, thereby facilitating the assembly and disassembly of the sizing block 1.
Illustratively, the corrosion protection layer may be a metallic lead layer.
When the donkey head is centered by the centering method provided by the embodiment of the disclosure, the walking beam and the donkey head are integrated, so that the inclination angle of the donkey head is equal to the inclination angle (relative to the horizontal plane) of the walking beam before and after the donkey head is centered. In addition, the hair plaits are arranged vertically to the ground all the time, so that the inclination angles of the front hair plaits and the rear hair plaits in the donkey head pair are equal to the inclination angle of the donkey head, and the inclination angles of the front hair plaits and the rear hair plaits in the donkey head pair are equal to the inclination angle of the walking beam. Therefore, the adjustment of the inclination angle of the horse head and the inclination angle of the hair braid can be realized by adjusting the inclination angle of the walking beam. In operation, first, the offset distance of the hair braid, the centering length of the hair braid, and the width of the walking beam are measured, respectively. Then, the thickness of the sizing block is determined through the offset distance of the hair braid, the centering length of the hair braid and the width of the walking beam, and the inclination angle adjustment amount of the walking beam is determined. And finally, correcting the position of the walking beam relative to the horizontal plane through a sizing block to realize the centering of the horse head. That is to say, this disclosure is through measuring the offset distance of hair pigtail, the centering length of hair pigtail and the width of walking beam, these three parameters that obtain of easily measuring, calculate the thickness that obtains the parallels, fill up the walking beam with the parallels of this thickness and establish, can realize the centering of horse head, and need not to use instrument such as jackscrew to adjust the location to the horse head, so avoided because of jackscrew corrosion, and lead to the problem of centering failure.
Fig. 7 is a cross-sectional view of a sizing block for centering a mule head of a walking beam pumping unit according to an embodiment of the present disclosure, and as shown in fig. 7, the sizing block 1 includes an adjusting member 11 and a spacer 12, the adjusting member 11 includes an adjusting rod 111 and a supporting block 112, one end of the adjusting rod 111 is fixed on the supporting block 112, and the other end of the adjusting rod 111 is slidably inserted into the spacer 12.
In the above embodiment, the distance between the supporting block 112 and the head block 12 can be adjusted by adjusting the insertion depth of the rod 111 into the head block 12, and the thickness d of the sizing block 1 can be adjusted.
Illustratively, the support block 112 is a plate-like structural member.
It is easily understood that the adjustment efficiency of the donkey head 700 centering is greatly improved by directly inserting the parallels 1 between the walking beam 200 and the central shaft 500 so that the hair braid 100 is centered with the donkey head 700.
Optionally, a rotatable top rod 121 is inserted into a side wall of the cushion block 12, an extending direction of the top rod 121 is perpendicular to an extending direction of the adjusting rod 111, a driving tooth 1211 is disposed on an outer peripheral wall of the top rod 121, a driven tooth 1111 is disposed on an outer wall of the adjusting rod 111 along the extending direction of the adjusting rod 111, and the driving tooth 1211 is engaged with the driven tooth 1111.
In the above embodiment, the driving teeth 1211 on the top rod 121 and the driven teeth 1111 on the adjusting rod 111 are engaged, so that the axial positioning of the adjusting rod 111 is facilitated, and the insertion depth of the adjusting rod 111 in the spacer 12 is facilitated to be adjusted.
It is easy to understand that, because the horse head 700 of the walking beam pumping unit is inclined to different degrees, the pad iron 1 with the constant thickness d needs to be selected, so that the horse head 700 is centered and the hair braid 100 is prevented from being worn.
Optionally, an end of the top bar 121 facing away from the adjusting rod 111 is provided with a rotating handle 1212.
In the above embodiment, the handle 1212 is rotated to facilitate manual grasping of the handle, thereby facilitating rotation of the push rod 121.
Optionally, a locking rod 122 is further inserted into the sidewall of the cushion block 12, a plurality of through holes 1112 arranged along the axial direction of the adjusting rod 111 are provided on the adjusting rod 111, and the through holes 1112 are used for inserting the locking rod 122.
In the above embodiment, the locking rod 122 is inserted into the through hole 1112, so that the axial movement of the adjusting rod 111 can be limited, and after the arrangement of the sizing block 1 is completed, the ejector rod 121 rotates to drive the adjusting rod 111 to move due to vibration, so that the thickness d of the sizing block 1 is changed, and finally the horsehead 700 is not centered by the hair braid 100.
With continued reference to fig. 7, the end face of the spacer 12 facing away from the adjustment member 11 is provided with a spacer 123.
In the above embodiment, the shim 123 can increase the contact area between the sizing block 1 and the walking beam 200, and prevent the sizing block 1 from wearing the walking beam 200.
The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (10)
1. A centering method for centering a mule head of a beam pumping unit is characterized by comprising the following steps:
measuring an offset distance (a) of a hair braid (100), wherein the offset distance (a) of the hair braid (100) is the shortest distance between a wear position of the hair braid (100) and a centering position of the hair braid (100);
measuring a centering length (b) of the hair braid (100), wherein the centering length (b) of the hair braid (100) is the shortest distance between a fixing position of the hair braid (100) and a wear position of the hair braid (100) in the centering direction of the hair braid (100);
measuring the width (c) of a walking beam (200), wherein the width (c) of the walking beam (200) is the shortest distance between two opposite side edges of the walking beam (200) on a horizontal plane;
providing a sizing block (1), wherein the thickness (d) of the sizing block (1) is determined by the offset distance (a) of the hair braid (100), the centering length (b) of the hair braid (100) and the width (c) of the walking beam (200), and the thickness (d) of the sizing block (1) is the length of the sizing block (1) in the direction perpendicular to the horizontal direction;
the position of the walking beam (200) relative to the horizontal plane is corrected through the sizing block (1).
2. The centering method according to claim 1, wherein said determining the thickness (d) of the parallels (1) by the offset distance (a) of the hair braid (100), the centering length (b) of the hair braid (100), and the width (c) of the walking beam (200) comprises:
calculating the product of the ratio of the offset distance (a) of the hair braid (100) to the centering length (b) of the hair braid (100) and the width (c) of the walking beam (200) as the thickness (d) of the sizing block (1).
3. Centering method according to claim 1, characterized in that said correcting the position of said walking beam (200) with respect to the horizontal plane by means of said sizing block (1) comprises:
disengaging a polished rod eye (300) from a first side catch (400) connected to the polished rod eye (300);
loosening a fixing bolt (600) for connecting the middle shaft (500) and the walking beam (200);
and the sizing block (1) is padded between the walking beam (200) and the central shaft (500).
4. The centering method of claim 3, wherein prior to said disengaging a rope hanger (300) from a first side clip (400) connected to said rope hanger (300), said centering method further comprises:
stopping the rope hanger (300) at a lowest position reached by the rope hanger (300).
5. The centering method according to any one of claims 1 to 4, wherein after said correcting the position of said walking beam (200) with respect to the horizontal plane by said sizing block (1), said centering method further comprises:
and a corrosion-resistant layer is coated on the sizing block (1).
6. The utility model provides a parallels for walking beam pumping unit horse head centering, its characterized in that, parallels (1) is including regulating part (11) and cushion (12), regulating part (11) are including adjusting pole (111) and supporting shoe (112), the one end of adjusting pole (111) is fixed on supporting shoe (112), the other end slidable cartridge of adjusting pole (111) is in cushion (12).
7. The sizing block according to claim 6, characterized in that a rotatable top rod (121) is inserted on the side wall of the spacer block (12), the extending direction of the top rod (121) is perpendicular to the extending direction of the adjusting rod (111), the outer peripheral wall of the top rod (121) is provided with a driving tooth (1211), the outer wall of the adjusting rod (111) is provided with a driven tooth (1111) along the extending direction of the adjusting rod (111), and the driving tooth (1211) is meshed with the driven tooth (1111).
8. The sizing block according to claim 7, characterized in that the end of the ejector rod (121) facing away from the adjusting rod (111) is provided with a rotary handle (1212).
9. The sizing block as recited in claim 7, characterized in that a locking rod (122) is further inserted on the sidewall of the sizing block (12), the adjusting rod (111) is provided with a plurality of through holes (1112) arranged along the axial direction of the adjusting rod (111), and the through holes (1112) are used for inserting the locking rod (122).
10. A shim iron as claimed in any one of claims 6 to 9, characterised in that the end face of the shim block (12) facing away from the adjusting piece (11) is provided with a shim (123).
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| CN201911086957.1A CN112780231B (en) | 2019-11-08 | 2019-11-08 | Centering method and sizing block for centering mule head of beam pumping unit |
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| CN201911086957.1A CN112780231B (en) | 2019-11-08 | 2019-11-08 | Centering method and sizing block for centering mule head of beam pumping unit |
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| CN112780231B CN112780231B (en) | 2023-04-07 |
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