CN111660254A - Deep well pump coupling disassembling calipers and using method thereof - Google Patents
Deep well pump coupling disassembling calipers and using method thereof Download PDFInfo
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- CN111660254A CN111660254A CN202010561557.8A CN202010561557A CN111660254A CN 111660254 A CN111660254 A CN 111660254A CN 202010561557 A CN202010561557 A CN 202010561557A CN 111660254 A CN111660254 A CN 111660254A
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- 230000008878 coupling Effects 0.000 title claims abstract description 43
- 238000010168 coupling process Methods 0.000 title claims abstract description 43
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000001936 parietal effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/026—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same fluid driven
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- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention provides a deep well pump coupling dismantling caliper and a use method thereof, the dismantling caliper comprises calipers arranged on a pipe body and a coupling in a crossed mode, the calipers are structurally an upper top wall, one side of the upper top wall is provided with a locking device, the other side of the upper top wall is provided with a bent chuck, the end part of the chuck is provided with a locking arm, one end of the locking arm is hinged with the chuck, one end of the locking device is hinged with the upper top wall, the other end of the locking arm is clamped inside the other end of the locking device and is locked through a locking screw rod, a hydraulic cylinder is arranged between the tail parts of the crossed calipers, the crossed calipers rotate relatively along the axis of the pipe body through pushing of the hydraulic cylinder, so that the pipe body and the coupling rotate relatively, the coupling and the pipe body are.
Description
Technical Field
The invention relates to the field of coupler disassembly calipers, in particular to a deep well pump coupler disassembly caliper and a using method thereof.
Background
The deep well pump well surface power device drives the long shaft to drive the pump impeller to rotate in the diversion shell, and water is pumped up through the pump impeller and the water pumping pipe. The long shaft is connected with the coupling by a plurality of short shafts with certain length, and the long shaft is in a high-torque running state as long as being started.
During the maintenance of the deep well pump, the long shaft is very tightly connected due to the reasons of large torque, soaking corrosion of water and the like for a long time. When the short shaft is disassembled section by section, a disassembling tool with large torque is needed for the short shaft and the coupling. The common use of the large pipe wrench is that when abnormal fastening connection is met, the problem that unsafe factors are increased in the dismounting process due to the fact that the arm bending, arm breaking, tooth breaking and the like are frequently caused by the fact that the wrench handle is often used for the steel pipe sleeve is solved by lengthening the arm of force and increasing the number of people is solved. The large pipe tongs currently used by us are generally rated to bear a maximum torque of about 1000n.m, and the increase of the casing and the manpower undoubtedly increase the safety operation risk.
The invention provides a special assembly for disassembling a threaded connecting pipe of a deep well pump, which comprises a support frame and two clamping frames, wherein the support frame is used for being placed on the ground of a well head, the two clamping frames are respectively used for clamping two adjacent sections of threaded connecting pipes, and the clamping frame positioned below is placed on the support frame; the clamping frame comprises a connecting plate and two clamping arms, one ends of the two clamping arms are hinged to the connecting plate respectively, the other ends of the two clamping arms are locked through detachable connecting pieces, each clamping arm comprises a clamping rod and a clamping piece, the inner surface of each clamping piece is arc-shaped, the two clamping pieces are opposite, and friction grains are arranged on the inner surface of each clamping piece. This dismantle special external member joint structure is great, needs the manual work to dismantle, and takes up an area of the position great, can't dismantle in narrow and small position.
Disclosure of Invention
The invention mainly aims to provide a deep well pump coupling disassembly caliper and a use method thereof, and solves the problem that a long shaft is corroded due to large torque and water immersion for a long time, and the coupling is disassembled frequently to cause bent arm breakage and tooth breakage.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a deep well pump coupling disassembly caliper and a using method thereof comprise calipers arranged on a pipe body and a coupling in a crossed mode, wherein the calipers are structurally an upper top wall, one side of the upper top wall is provided with a locking device, the other side of the upper top wall is provided with a bent chuck, the end part of the chuck is provided with a locking arm, one end of the locking arm is hinged with the chuck, one end of the locking device is hinged with the upper top wall, the other end of the locking arm is clamped inside the other end of the locking device and locked through a locking screw rod, and a hydraulic cylinder;
the crossed calipers rotate relatively along the axis of the pipe body through pushing of the hydraulic cylinder, so that the pipe body and the coupler rotate relatively.
In a preferable scheme, the inner side wall of the clamping head is provided with a first clamping tooth, and the end part, close to the clamping head, of the locking arm is provided with a second clamping tooth.
In a preferred scheme, the locking device is provided with a locking groove, and the end part of the locking arm is arranged in the locking groove.
In the preferred scheme, the end part of the locking arm is provided with a locking hole, and the locking screw rod penetrates through the end part of the locking device and abuts against one side of the locking hole.
In the preferred scheme, the end part of the locking screw rod is provided with a fixing head which is spherical or cylindrical.
In a preferred scheme, the fixing head is clamped inside the locking hole.
In the preferred scheme, the tail part of the upper top wall is provided with a top seat, the top seat is hinged with the upper top wall, the hydraulic cylinder is arranged on the top seat, and the movable end of the hydraulic cylinder abuts against the tail part of the lower top wall of the lower caliper.
In the preferred scheme, the tail part of the lower top wall is provided with a groove body, the two ends of the groove body are provided with round convex heads, the movable end of the hydraulic cylinder is provided with a screw rod seat, the upper end and the lower end of the screw rod seat are provided with arc grooves, a positioning block is arranged between the two arc grooves and clamped inside the groove body, and the arc grooves are clamped on the round convex heads.
In the preferred scheme, the movable end of the hydraulic cylinder is provided with an adjusting screw rod, the adjusting screw rod is rotatably connected with the end part of the hydraulic cylinder, the adjusting screw rod is in threaded connection with a screw rod seat, and the adjusting screw rod penetrates through the groove body.
The method comprises the following steps:
s1, the upper top wall is clamped on the pipe body, and the end part of the locking arm is clamped inside the locking device and locked through the locking screw rod;
s2, locking the lower top wall on the coupler in the same step S1;
s3, installing a hydraulic cylinder on the top seat on the upper top wall, installing a rotating adjusting screw rod on the movable end of the hydraulic cylinder, and installing a screw rod seat on the adjusting screw rod;
s4, the adjusting screw rod is clamped inside the groove body, the adjusting screw rod is rotated to enable the arc groove of the screw rod seat to be clamped on the round convex head at the tail of the lower top wall, and the positioning block is clamped inside the groove body;
s5, starting a hydraulic device, and enabling the hydraulic cylinder to push the lower top wall and the upper top wall to rotate relatively to loosen the coupler and the pipe body;
and S6, detaching the coupler and the pipe body through the large pipe wrench.
The invention provides a deep well pump coupling disassembly caliper and a use method thereof, wherein an upper top wall, a locking arm and a locking device are assembled into the caliper, the caliper is assembled on an upper top wall and a lower top wall of a coupling clamp, the caliper is assembled on the upper top wall of the coupling clamp, the upper caliper and the lower caliper are arranged on a pipe body and the coupling in a crossed mode, the end parts of the lower top wall and the upper top wall are pushed by a hydraulic cylinder, the crossed calipers rotate relatively along the axis of the pipe body, so that the pipe body and the coupling rotate relatively, the coupling and the pipe body are loosened, the phenomena of arm breakage, tooth breakage and the like of a bent arm cannot occur, the structure is compact, the use is convenient, the.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a general block diagram of the present invention;
FIG. 2 is a structural view of the tube and coupling of the present invention;
FIG. 3 is a view of the present invention showing the caliper clamped to the tube and the coupling;
FIG. 4 is a view of the construction of the lower top wall of the present invention clamped in the coupler;
FIG. 5 is a view of the upper wall of the present invention clamped to the tube;
FIG. 6 is a top wall expanded view of the present invention;
FIG. 7 is a top wall clamping configuration of the present invention;
FIG. 8 is a top wall locking configuration of the present invention;
FIG. 9 is a lower top wall rear structural view of the hydraulic cylinder ground structure of the present invention;
in the figure: a lower ceiling wall 1; a tank body 101; a round nose 102; an upper ceiling wall 2; a chuck 201; a first latch 202; a hydraulic cylinder 3; a screw base 4; an arc groove 401; a positioning block 402; adjusting a screw rod 5; a top seat 6; a lock arm 7; a locking hole 701; a second latch 702; a locking device 8; a locking groove 801; a screw rod 9 is locked; a fixed head 901; a coupling 10; a tubular body 11.
Detailed Description
Example 1
As shown in fig. 1-9, a deep well pump coupling disassembly caliper and a use method thereof comprise calipers which are arranged on a pipe body 11 and a coupling 10 in a crossed mode, wherein the caliper is structurally characterized in that an upper top wall 2 is arranged, a locking device 8 is arranged on one side of the upper top wall 2, a bent chuck 201 is arranged on the other side of the upper top wall, a locking arm 7 is arranged at the end part of the chuck 201, one end of the locking arm 7 is hinged to the chuck 201, one end of the locking device 8 is hinged to the upper top wall 2, the other end of the locking arm 7 is clamped inside the other end of the locking device 8 and locked through a locking screw rod 9, a hydraulic cylinder 3 is arranged between the tail parts of the crossed calipers, and the crossed calipers rotate relatively. From this structure, it is similar to go up the calliper structure from top to bottom, only go up roof 2 and the 3 different positions of roof 1 afterbody installation pneumatic cylinder down, will go up roof 2, a calliper is assembled into to locking arm 7 and locking device 8, the calliper of roof 1 equipment about the shaft coupling card, the calliper of roof 2 equipment about the body 11 card, go up calliper cross arrangement on body 11 and shaft coupling 10 from top to bottom, roof 1 pushes away through pneumatic cylinder 3 with 2 tip of last roof down, make alternately calliper rotate along 11 axle centers of body, so that relative rotation on body 11 and the shaft coupling 10, make shaft coupling 10 and body 11 not hard up, the phenomenon such as the broken arm of curved boom collapses the tooth can not appear, compact structure, high durability and convenient use, the occupation space is few, and is suitable for being.
The large pipe tongs currently used by people generally bear the maximum torque of about 1000N.m, and the increase of the casing and the manpower undoubtedly increase the safety operation risk. The shaft caliper can achieve two or three times or higher moment than that of a pipe wrench, reduces manpower and reduces operation risks. The upper caliper and the lower caliper rotate relatively by 30 degrees. The arm length is designed to be 200 mm, and the external force is applied by a hydraulic jack of not more than 3 tons, so that the moment of about 5000N. The shaft caliper is only suitable for right-handed loosening or screwing of a shaft with the diameter of 60mm and the outer diameter of a coupling of 84 mm.
Preferably, the inner side wall of the chuck 201 is provided with a first latch 202, and the end of the locking arm 7 close to the chuck 201 is provided with a second latch 702. By this structure, the first latch 202 and the second latch 702 increase the friction force with the pipe 11 and the coupling 10, so that the locking structure is more stable.
In a preferred embodiment, the locking device 8 is provided with a locking groove 801, and the end of the locking arm 7 is arranged inside the locking groove 801. With the structure, as shown in fig. 6-7, the end of the locking arm 7 is clamped in the locking groove 801, the structure is simple, the clamping is stable, and the deviation condition can not occur.
In a preferable scheme, a locking hole 701 is formed at the end part of the locking arm 7, and the locking screw rod 9 penetrates through the end part of the locking device 8 and abuts against one side of the locking hole 701. With the structure, after the end part of the locking arm 7 is clamped in the locking groove 801, the locking screw rod 9 passes through the end part of the locking device 8 and abuts against one side of the locking hole 701, and the pressing locking arm 7 is locked on the pipe body 11 or the coupling 10.
In a preferred embodiment, a fixing head 901 is disposed at an end of the locking screw 9, and the fixing head 901 is spherical or cylindrical. With this configuration, as shown in fig. 8, in this embodiment, the fixing head 901 is preferably spherical.
In a preferred embodiment, the fixing head 901 is clamped inside the locking hole 701. With this structure, as shown in fig. 7 to 8, the fixing head 901 is caught in the locking hole 701 to prevent a slip condition from occurring, for fixing the lock arm 7.
In the preferred scheme, go up 2 tails of parietal wall and be equipped with footstock 6, footstock 6 is articulated with last parietal wall 2, pneumatic cylinder 3 is established on footstock 6, and 3 expansion ends of pneumatic cylinder lean on and lean on 1 tails of parietal under calliper down. With this structure, the top base 6 enables the hydraulic cylinder 3 to rotate, and the freedom of movement enables the apparatus to be smoothly disassembled.
In the preferred scheme, the tail of the lower top wall 1 is provided with a groove body 101, the two ends of the groove body 101 are provided with circular raised heads 102, the movable end of the hydraulic cylinder 3 is provided with a screw rod seat 4, the upper end and the lower end of the screw rod seat 4 are provided with circular arc grooves 401, a positioning block 402 is arranged between the two circular arc grooves 401, the positioning block 402 is clamped inside the groove body 101, and the circular arc grooves 401 are clamped on the circular raised heads 102. From this structure, as the structure shown in fig. 9, arc groove 401 on the lead screw seat 4 blocks on the round nose 102, and locating piece 402 blocks in the cell body 101, plays location and swing joint effect, but when lower roof 1 was rotatory, arc groove 401 and round nose 102's effect prevented the condition of sliding from appearing in lead screw seat 4.
In the preferred scheme, the movable end of the hydraulic cylinder 3 is provided with an adjusting screw rod 5, the adjusting screw rod 5 is rotatably connected with the end part of the hydraulic cylinder 3, the adjusting screw rod 5 is in threaded connection with a screw rod seat 4, and the adjusting screw rod 5 penetrates through the groove body 101. From this structure, accommodate the lead screw 5 is used for adjusting lead screw seat 4 for the position, makes things convenient for lead screw seat 4 to block in roof 1 afterbody down.
Example 2
As further described with reference to embodiment 1, as shown in fig. 1 to 9, the upper ceiling wall 2 is clamped on the tube body 11, and the end of the locking arm 7 is clamped inside the locking device 8 and locked by the locking screw 9.
The lower ceiling wall 1 is locked to the coupling 10 in the same step as S1.
The upper top wall 2 is provided with a hydraulic cylinder 3 on a top seat 6, a movable end of the hydraulic cylinder 3 is provided with a rotating adjusting screw rod 5, and a screw rod seat 4 is arranged on the adjusting screw rod 5.
Adjusting screw 5 is blocked inside groove body 101, and rotatory adjusting screw 5 makes the circular arc groove 401 of lead screw seat 4 block on the round convex head 102 of roof 1 afterbody down, and locating piece 402 block is inside groove body 101.
The hydraulic device is started, and the hydraulic cylinder 3 pushes the lower top wall 1 and the upper top wall 2 to rotate relatively to loosen the coupler 10 and the pipe body 11.
And then the coupling 10 and the pipe body 11 are dismounted through a large pipe wrench.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a deep-well pump shaft coupling dismantles calliper which characterized by: the clamp comprises calipers arranged on a pipe body (11) and a coupler (10) in a crossed mode, the calipers are structurally an upper top wall (2), a locking device (8) is arranged on one side of the upper top wall (2), a bent chuck (201) is arranged on the other side of the upper top wall, a locking arm (7) is arranged at the end portion of the chuck (201), one end of the locking arm (7) is hinged to the chuck (201), one end of the locking device (8) is hinged to the upper top wall (2), the other end of the locking arm (7) is clamped inside the other end of the locking device (8) and locked through a locking screw rod (9), and a hydraulic cylinder (3;
the crossed calipers rotate relatively along the axis of the pipe body (11) through pushing of the hydraulic cylinder (3), so that the pipe body (11) and the coupler (10) rotate relatively.
2. The deep well pump coupling release caliper of claim 1, wherein: the inside wall of dop (201) is equipped with first latch (202), locking arm (7) are close to dop (201) tip and are equipped with second latch (702).
3. The deep well pump coupling release caliper of claim 1, wherein: and a locking groove (801) is formed in the locking device (8), and the end part of the locking arm (7) is arranged in the locking groove (801).
4. The deep well pump coupling release caliper of claim 3, wherein: the end part of the locking arm (7) is provided with a locking hole (701), and the locking screw rod (9) penetrates through the end part of the locking device (8) and abuts against one side of the locking hole (701).
5. The deep well pump coupling release caliper of claim 4, wherein: the end part of the locking screw rod (9) is provided with a fixing head (901), and the fixing head (901) is spherical or cylindrical.
6. The deep well pump coupling release caliper of claim 5, wherein: the fixing head (901) is clamped inside the locking hole (701).
7. The deep well pump coupling release caliper of claim 1, wherein: go up roof (2) afterbody and be equipped with footstock (6), footstock (6) are articulated with last roof (2), establish on footstock (6) pneumatic cylinder (3), and pneumatic cylinder (3) expansion end supports and leans on roof (1) afterbody under calliper down.
8. The deep well pump coupling release caliper of claim 7, wherein: the tail of the lower top wall (1) is provided with a groove body (101), the two ends of the groove body (101) are provided with circular raised heads (102), the movable end of the hydraulic cylinder (3) is provided with a screw rod seat (4), the upper end and the lower end of the screw rod seat (4) are provided with arc grooves (401), a positioning block (402) is arranged between the two arc grooves (401), the positioning block (402) is clamped inside the groove body (101), and the arc grooves (401) are clamped on the circular raised heads (102).
9. The deep well pump coupling release caliper of claim 8, wherein: the movable end of the hydraulic cylinder (3) is provided with an adjusting screw rod (5), the adjusting screw rod (5) is rotatably connected with the end part of the hydraulic cylinder (3), the adjusting screw rod (5) is in threaded connection with a screw rod seat (4), and the adjusting screw rod (5) penetrates through the groove body (101).
10. Use of a deep-well pump coupling release caliper according to any of claims 1 to 10, characterized in that:
the method comprises the following steps:
s1, clamping the upper top wall (2) on the pipe body (11), clamping the end part of the locking arm (7) inside the locking device (8) and locking the locking device through the locking screw rod (9);
s2, locking the lower top wall (1) on the coupler (10) in the same step as the step S1;
s3, installing a hydraulic cylinder (3) on a top seat (6) of an upper top wall (2), installing a rotating adjusting screw rod (5) at the movable end of the hydraulic cylinder (3), and installing a screw rod seat (4) on the adjusting screw rod (5);
s4, the adjusting screw rod (5) is clamped inside the groove body (101), the adjusting screw rod (5) is rotated to clamp the arc groove (401) of the screw rod seat (4) on the circular raised head (102) at the tail of the lower top wall (1), and the positioning block (402) is clamped inside the groove body (101);
s5, starting a hydraulic device, and enabling the coupling (10) and the pipe body (11) to be loosened by the relative rotation of the lower top wall (1) and the upper top wall (2) pushed by the hydraulic cylinder (3);
and S6, detaching the coupler (10) and the pipe body (11) through a large pipe wrench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010561557.8A CN111660254B (en) | 2020-06-18 | 2020-06-18 | Deep well pump coupling dismounting caliper and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010561557.8A CN111660254B (en) | 2020-06-18 | 2020-06-18 | Deep well pump coupling dismounting caliper and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111660254A true CN111660254A (en) | 2020-09-15 |
| CN111660254B CN111660254B (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010561557.8A Active CN111660254B (en) | 2020-06-18 | 2020-06-18 | Deep well pump coupling dismounting caliper and use method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9525837D0 (en) * | 1994-12-21 | 1996-02-21 | Daewoo Heavy Ind Co Ltd | Caliper assembly for a disc brake |
| CN202239318U (en) * | 2011-10-25 | 2012-05-30 | 浙江正同管业有限公司 | Hydraulic calipers for rapid self-locking of metal pipe fitting |
| CN203239264U (en) * | 2013-03-08 | 2013-10-16 | 中国石油天然气股份有限公司 | Self-locking type blowout prevention box support clamp |
| CN207746763U (en) * | 2017-12-22 | 2018-08-21 | 宣城市建林机械有限公司 | Process the frock clamp of single cylinder clamp |
| CN209687433U (en) * | 2019-01-31 | 2019-11-26 | 宝鸡石油机械有限责任公司 | Scissors V shape tubing string clamp |
| CN110842528A (en) * | 2019-12-13 | 2020-02-28 | 国家电网有限公司 | Special external member is dismantled to deep-well pump threaded connection pipe |
| CN212287466U (en) * | 2020-06-18 | 2021-01-05 | 湖北清江水电开发有限责任公司 | Deep well pump coupling dismantles calliper |
-
2020
- 2020-06-18 CN CN202010561557.8A patent/CN111660254B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9525837D0 (en) * | 1994-12-21 | 1996-02-21 | Daewoo Heavy Ind Co Ltd | Caliper assembly for a disc brake |
| CN202239318U (en) * | 2011-10-25 | 2012-05-30 | 浙江正同管业有限公司 | Hydraulic calipers for rapid self-locking of metal pipe fitting |
| CN203239264U (en) * | 2013-03-08 | 2013-10-16 | 中国石油天然气股份有限公司 | Self-locking type blowout prevention box support clamp |
| CN207746763U (en) * | 2017-12-22 | 2018-08-21 | 宣城市建林机械有限公司 | Process the frock clamp of single cylinder clamp |
| CN209687433U (en) * | 2019-01-31 | 2019-11-26 | 宝鸡石油机械有限责任公司 | Scissors V shape tubing string clamp |
| CN110842528A (en) * | 2019-12-13 | 2020-02-28 | 国家电网有限公司 | Special external member is dismantled to deep-well pump threaded connection pipe |
| CN212287466U (en) * | 2020-06-18 | 2021-01-05 | 湖北清江水电开发有限责任公司 | Deep well pump coupling dismantles calliper |
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| CN111660254B (en) | 2023-10-27 |
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