CN212665973U - High-pressure water injection pump packing extractor - Google Patents
High-pressure water injection pump packing extractor Download PDFInfo
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- CN212665973U CN212665973U CN202021172717.1U CN202021172717U CN212665973U CN 212665973 U CN212665973 U CN 212665973U CN 202021172717 U CN202021172717 U CN 202021172717U CN 212665973 U CN212665973 U CN 212665973U
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Abstract
The utility model provides a high-pressure water injection pump packing extractor, includes supporting steel plate, interior screw rod, outer screw rod and spiral hook, outer screw rod passes supporting steel plate, interior screw rod sets up in the outer screw rod, the bottom of interior screw rod is provided with the spiral hook, the top of interior screw rod is provided with nut one, outer screw rod pass through nut two with supporting steel plate connects. High pressure water injection pump packing extractor can be scientific, effectual solution difficult problem in the production, has not only shortened the operating time of changing the packing, has still improved construction quality and safety control, creates good economic benefits.
Description
Technical Field
The utility model relates to a water injection pump packing extractor especially relates to an extraction element for high-pressure water injection pump packing.
Background
Packing (packing), also called sealing packing, is usually woven from softer threads, and strips, usually square or rectangular or circular in cross-section, are filled in a sealing cavity to achieve sealing. The stuffing seal is firstly to prevent the liquid flow from leaking by the fiber plug such as cotton and hemp in the leakage passage, and is mainly used as the shaft seal of the water lifting machine. The filler has wide sources, easy processing, low price, reliable sealing and simple operation, so the filler is continuously used up to now. Packing is now widely used in centrifugal pumps, compressors, vacuum pumps, shaft seals for blenders and marine propellers, piston pumps, reciprocating compressors, reciprocating shaft seals for refrigerators, rotary seals for valve stems of various valves, and the like.
The braided packing is formed by braiding expanded graphite wires, is commonly used in most occasions except strong oxidants, and can be used for boiling water, high-temperature high-pressure steam, heat exchange media, oils, acids, alkalis, hydrogen, ammonia, organic solvents, hydrocarbons, low-temperature liquid and other media. It is a unique novel sealing packing.
The shaft surface of the packing working principle is extremely uneven under the microscopic condition and can only be partially attached to the packing. There is a slight clearance between the packing and the shaft, just like a labyrinth. The medium is intercepted in the labyrinth for many times, thereby achieving the sealing effect.
The packing seal is arranged in the packing box by packing, and the packing is tightly pressed on the surface of the shaft by a packing gland. Since the surface of the shaft is always rough, the shaft can only partially fit the packing without being partially contacted, and a plurality of labyrinths are formed. When the medium under pressure passes the shaft surface, the medium is throttled a number of times, whereby a sealing is achieved by means of this "labyrinth effect". The contact, friction of the filler with the shaft surface, also like a sliding bearing, should inherently be sufficient liquid to lubricate it to ensure a certain life of the seal, the so-called "bearing effect". This shows a good packing seal, i.e. a combination of the labyrinth effect and the bearing effect.
The packing force on the shaft is generated by tightening the gland bolts. Because the packing is an elastoplast, after the packing is compressed axially, friction force is generated to ensure that the pressing force is gradually reduced along the axial direction, and meanwhile, the generated radial pressing force ensures that the packing is tightly attached to the surface of the shaft to prevent the medium from leaking outwards. The distribution of radial pressing force is from the outer end (gland) to the inner end, the pressure decreases rapidly and then becomes gentle, the distribution of medium pressure decreases gradually from the inner end to the outer end, when the medium pressure at the outer end is zero, the leakage is little, and the leakage is larger than zero.
With the continuous emergence of new materials, the structural form of the packing is greatly changed, which undoubtedly will make the application of packing seal more extensive, and the material used as the packing should have the following characteristics: has certain elasticity and plasticity. When the packing is compressed axially, a larger radial pressing force can be generated to obtain sealing; when the machine and the shaft have vibration or the shaft has run-out and eccentricity, the compensation capability (following capability) can be realized; chemical stability. The corrosion and swelling of the medium are avoided, and the medium is not polluted; impermeability. The medium has some penetration to most fibers, so that the filler tissue is required to be compact, and various lubricants and fillers are required to be impregnated and filled when the filler is manufactured; the self-lubricating property is good, the friction coefficient is small and the wear resistance is good; and (5) temperature resistance. The heat-generating material can bear a certain temperature after friction heating; the disassembly is convenient; simple manufacture and low cost.
The high-pressure water injection pump plays an important role in a water injection process, is main water injection equipment in an oil field, the packing on the high-pressure water injection pump plays a sealing role, the service life is short, aging and abrasion are easy to occur, and the water injection equipment is easy to have a puncture phenomenon under high-pressure and high-impact alternating load. Because large-scale water injection pump is drawn the work interval 10cm of getting the packing, operating space is too little, when changing high-pressure water injection pump packing, generally all with tools such as hook, bottle opener take out preceding 3 packing, 3 packing at the back are got unclean or directly do not get, only wait to overhaul the water injection pump in just can thoroughly change, the operating time of changing the packing at every turn needs 50 minutes about just can accomplish, operating personnel's intensity of labour is big, work efficiency is low. The traditional operation method has the defects and hidden dangers of unclean taking, incompact adding, easy leakage, long operation time, easy injury to people and the like. Moreover, the water injection pump packing replacement workload accounts for 60% of the total maintenance workload during the entire maintenance work of the water injection station. The developed high-pressure water injection pump packing extractor can effectively improve the current situations that the packing replacement of the existing water injection station is long in time consumption and high in labor intensity of workers.
Therefore, the packing taking-out device with simple structure and high working efficiency is urgently needed in the field.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a high-pressure water injection pump packing extractor mainly comprises supporting steel plate, spiral hook. The purpose of taking out the packing is achieved by the matching and stretching of the inner screw and the outer screw through the positioning of the supporting steel plate.
The supporting steel plate is used as a receiving unit and provides positioning during working. The spiral hook of connecting the supporting steel plate gets and treats operation packing, through threaded rod transmission moment, strengthens the working strength of packing extractor. In application, technicians find that the rigidity of a system cannot be met by a single screw, so that the packing extractor is deformed in the use process and cannot work normally, therefore, the applicant creatively sets a unique internal and external double-screw mode and successfully solves the problem.
The technical scheme of the utility model is that:
the utility model provides a high pressure water injection pump packing extractor which characterized in that: including supporting steel plate, interior screw rod, outer screw rod and spiral hook, outer screw rod passes supporting steel plate, interior screw rod sets up in the outer screw rod, spiral hook sets up the bottom of interior screw rod, the top of interior screw rod is provided with nut one, outer screw rod pass through nut two with supporting steel plate connects.
Preferably, the support steel plate is substantially cylindrical.
Preferably, the support steel plate has an average thickness of not less than 10 mm.
Preferably, the diameter of the second nut is twice the diameter of the outer screw.
Preferably, the diameter of the first nut is smaller than that of the second nut.
The utility model discloses simple structure, convenient to use, packing take out efficiently, do not harm the packing, technical staff can go up the hand fast, are applicable to and promote in a large number in the oil field.
Drawings
Fig. 1 is a schematic structural view of the packing extractor of the present invention.
The reference numbers are as follows:
1-supporting steel plate, 2-first screw cap, 3-second screw cap, 4-internal screw rod, 5-spiral hook and 6-external screw rod.
Detailed Description
The packing extractor of the present invention will be described in detail with reference to the accompanying drawings.
Example 1:
in this embodiment, the technical parameters of the high-pressure water injection pump packing extractor are selected as follows:
the tool body is determined. According to the field measurement result, the external space of the centrifugal pump stuffing box is 100mm, and the machining length of the external screw is determined to be 70mm by considering the rotation space of the sleeve nut needed by the internal screw; the internal screw rod is 90mm and the screw head is 40mm according to the depth of the stuffing box.
And (II) determining the diameter of the tool. The inner diameter was determined to be 10mm and the outer diameter to be 16mm, depending on the width of the stuffing box.
And (III) determining the connection mode and the material of the internal and external screw rods, and selecting a threaded connection mode (simple, safe, convenient, easy to use and low in cost) according to the aspects of processing difficulty, safety difficulty, stability, safety, manufacturing cost and the like. In selecting a material, 65# steel is selected from the viewpoint of tensile strength, yield strength, elongation, reduction of area, hardness, and the like.
And (IV) supporting the steel plate. Preferably 45# carbon steel, the inner screw is 90mm according to the depth of the stuffing box, and the groove pitch is 20mm so that the outer screw can pass through the supporting baffle.
And (V) selecting a second nut. The second nut should be large enough to provide enough supporting force. The outer diameter of the second nut is 35mm, the diameter of the second nut is twice that of the screw, and the inner diameter of the second nut is matched with the screw.
And (VI) selecting a first nut. If the screw cap is too large, the internal tensile stress of the screw during working can be influenced, and the screw is easy to break during use. Therefore, the diameter of the first nut is selected to be 15mm, which is smaller than the diameter of the second nut.
The top plane of the cylindrical supporting steel plate is perforated and penetrates through an outer screw rod, the inner screw rod is arranged in the outer screw rod, and the outer screw rod is fixed at the bottom of the supporting steel plate through a second nut. The upper end of the outer screw rod is located inside the cylinder of the supporting steel plate, the first nut is arranged on the outer screw rod, the position of the inner screw rod relative to the supporting steel plate can be adjusted by rotating the first nut, and therefore the spiral hook at the tail of the inner screw rod is driven to pull the packing. The pulling force is amplified through the two screw rods, is far greater than the force directly acting on the packing, and is more stable and very powerful in replacement of the packing.
The working principle is as follows: firstly, an inner screw rod with a hook is sleeved, the device is placed into a stuffing box, the inner screw rod is rotated, and a spiral hook is driven to penetrate into a packing; the packing is taken out by inserting the support steel plate and rotating the nut to make the inner screw move outwards linearly, and the time for replacing the packing is shortened from 50 minutes before development to 20 minutes after development.
If special circumstances is met, the internal screw can not loosen the packing, then the pulling force to the packing can be further increased by the special tool and the adjusting nut II, and then all water injection pump packing problems can be basically solved.
Example two:
the tool body is determined. According to the field measurement result, the external space of the centrifugal pump stuffing box is 60mm, and the machining length of the external screw is determined to be 50mm by considering the fact that the internal screw needs to be sleeved with a nut rotating space; the inner screw rod is 40mm and the screw head is 20mm according to the depth of the stuffing box.
And (II) determining the diameter of the tool. The inner diameter was determined to be 10mm and the outer diameter to be 16mm, depending on the width of the stuffing box.
And (III) determining the connection mode and the material of the internal and external screw rods, and selecting a threaded connection mode (simple, safe, convenient, easy to use and low in cost) according to the aspects of processing difficulty, safety difficulty, stability, safety, manufacturing cost and the like. In selecting the material, cast steel is selected from the viewpoint of tensile strength, yield strength, elongation, reduction of area, hardness, and the like.
And (IV) supporting the steel plate. Preferably 45# carbon steel, the inner screw is 50mm according to the depth of the stuffing box, and the groove pitch is 10mm so that the outer screw can pass through the supporting baffle.
And (V) selecting a second nut. The outer diameter of the second screw cap is 32mm, the diameter of the second screw cap is twice that of the screw, and the inner diameter of the second screw cap is matched with the screw.
And (VI) selecting a first nut. If the screw cap is too large, the internal tensile stress of the screw during working can be influenced, and the screw is easy to break during use. Therefore, the diameter of the first nut is selected to be 10mm, which is smaller than the diameter of the second nut.
The top plane of the cylindrical supporting steel plate is perforated and penetrates through an outer screw rod, the inner screw rod is arranged in the outer screw rod, and the outer screw rod is fixed at the bottom of the supporting steel plate through a second nut. The upper end of the outer screw rod is located inside the cylinder of the supporting steel plate, the first nut is arranged on the outer screw rod, the position of the inner screw rod relative to the supporting steel plate can be adjusted by rotating the first nut, and therefore the spiral hook at the tail of the inner screw rod is driven to pull the packing. The pulling force is amplified through the two screw rods, is far greater than the force directly acting on the packing, and is more stable and very powerful in replacement of the packing.
In actual production, packing extractor, improvement work efficiency that can be very big, concrete data are as follows:
the problem of high-pressure underinjection of partial water injection wells and blocks in oil fields is highlighted in recent years, so that people are prompted to recognize the necessity of developing high-pressure water injection, and the demand on high-pressure water injection pumps is increased. This difficult problem in high pressure water injection pump packing extractor can scientific, effectual solution production has not only shortened the operating time of changing the packing, has still improved construction quality and safety control, creates good economic benefits. Therefore, the device is worthy of great popularization and application.
The foregoing is only a part of the preferred embodiments of the present invention. Any person skilled in the art may modify the above-described embodiments or modify them to equivalent solutions. Therefore, any simple modifications or equivalent replacements made according to the embodiments of the present invention belong to the scope of the claimed invention.
Claims (5)
1. The utility model provides a high pressure water injection pump packing extractor which characterized in that: including supporting steel plate (1), interior screw rod (4), outer screw rod (6) and spiral hook (5), outer screw rod (6) are passed supporting steel plate (1), interior screw rod (4) set up in outer screw rod (6), spiral hook (5) set up the bottom of interior screw rod (4), the top of interior screw rod (4) is provided with nut one (2), outer screw rod (6) through nut two (3) with supporting steel plate (1) are connected.
2. The high-pressure water injection pump packing extractor of claim 1, wherein: the support steel plate (1) is substantially cylindrical.
3. The high-pressure water injection pump packing extractor of claim 2, wherein: the average thickness of the supporting steel plate (1) is not less than 10 mm.
4. The high-pressure water injection pump packing extractor of claim 1, wherein: the diameter of the second nut (3) is twice that of the outer screw rod (6).
5. The high-pressure water injection pump packing extractor of claim 1, wherein: the diameter of the first nut (2) is smaller than that of the second nut (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021172717.1U CN212665973U (en) | 2020-06-22 | 2020-06-22 | High-pressure water injection pump packing extractor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021172717.1U CN212665973U (en) | 2020-06-22 | 2020-06-22 | High-pressure water injection pump packing extractor |
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| CN212665973U true CN212665973U (en) | 2021-03-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114406952A (en) * | 2021-12-31 | 2022-04-29 | 山西天地王坡煤业有限公司 | Device for taking out damaged anchoring agent |
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2020
- 2020-06-22 CN CN202021172717.1U patent/CN212665973U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114406952A (en) * | 2021-12-31 | 2022-04-29 | 山西天地王坡煤业有限公司 | Device for taking out damaged anchoring agent |
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