CN203604189U - Piston for slurry pump - Google Patents
Piston for slurry pump Download PDFInfo
- Publication number
- CN203604189U CN203604189U CN201320798306.7U CN201320798306U CN203604189U CN 203604189 U CN203604189 U CN 203604189U CN 201320798306 U CN201320798306 U CN 201320798306U CN 203604189 U CN203604189 U CN 203604189U
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- piston
- leather cup
- groove
- pressing plate
- main body
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Abstract
The utility model provides a piston for a slurry pump. The piston for the slurry pump comprises a piston body, a rubber cup and a press plate, wherein the piston body is sleeved with the rubber cup, the press plate is arranged above the rubber cup, the side, close to a piston rod, of the piston body is provided with a cylinder portion, the outer diameter of the cylinder portion is smaller than that of the piston body, the cylinder portion is sleeved with the rubber cup, a first groove is formed in the side, opposite to the press plate, of the rubber cup, and first through holes are formed in the press plate, penetrate through the press plate in the thickness direction of the press plate, and are communicated with the first groove. When the piston moves forwards, high-pressure silt fluid in the slurry pump flows into the first groove, the outer diameter of the lip of the rubber cup can be increased, the rubber cup makes close contact with the inner wall surface of a cylinder sleeve of the slurry pump, and the effect of sealing carried out by the rubber cup on a compression cavity of the slurry pump can be improved; when the piston moves backwards, the silt fluid in the first groove is discharged out through the negative pressure in the cylinder sleeve of the slurry pump, the rubber cup recovers, and the frequency of the phenomenon that abrasion happens between the rubber cup and the inner wall surface of the cylinder sleeve of the slurry pump can be reduced.
Description
Technical field
The utility model relates to a kind of mud Piston for pump.
Background technique
Along with the development of modernization industry, oil plays very important effect in modern industry.In petroleum production, the key equipment of drilling well is slurry pump, and piston is the key components and parts of slurry pump.Piston is originally divided into steel core, leather cup, pressing plate, four parts of jump ring, operate in Metallic cylinder, active force by power end moves back and forth, by the suction repeatedly of the fluid mud of slurry pump, extrude, because of the sand grain wearing and tearing in long-time and Metallic cylinder and fluid mud, after causing every use a period of time of piston, mud is revealed the piston that must more renew, or, piston is because of leather cup and the poor eccentric wear that causes of steel core coaxality conformity, or in mud wearing and tearing, use very fast because piston cup lip limit intensity is too low, cause inefficiency, change part cost large, the consequences such as waste in man-hour.
Model utility content
In view of this, main purpose of the present utility model is, a kind of mud Piston for pump that is conducive to increase the service life is provided.
For achieving the above object, the utility model proposes a kind of mud Piston for pump, described piston is fixed on the end of piston rod, described piston comprises piston main body, is sleeved on the leather cup on this piston main body, and be configured in the pressing plate of this leather cup top, described piston main body has near a side of described piston rod the cylindrical part that external diameter is less than the external diameter of described piston main body, and described leather cup is sleeved in this cylindrical part.
Adopt said structure, owing to forming described cylindrical part on described piston main body, and described leather cup is sleeved in this cylindrical part, is conducive to improve the fix tightly solidity of described leather cup, thereby improves the overall steadiness of whole mud Piston for pump.
Preferably, a side relative with described pressing plate at described leather cup forms the first groove, forms the first through hole that runs through and be communicated with described the first groove along its thickness direction on described pressing plate.
Adopt said structure, when described piston moves towards the direction that the compression chamber of slurry pump is diminished, high pressure silt fluid in slurry pump described the first through hole of flowing through enters in the first groove, utilize the silt fluid high-pressure in the first groove to produce a tension force to the lip limit of described leather cup, described leather cup lip limit external diameter is increased, described leather cup contacts closely with the internal face of mud slurry pump cylinder jacket, is conducive to improve the sealing effect of described leather cup to slurry pump compression chamber; Described piston is in the time that the compression chamber that makes slurry pump becomes the motion of large direction, negative pressure in the cylinder sleeve of slurry pump is by the silt fluid expulsion in the first groove, the lip limit tension force of described leather cup diminishes, described leather cup restores, can reduce like this wearing and tearing between the inboard wall of cylinder liner face of described leather cup and slurry pump, can guarantee that the sealing effect of described piston is conducive to again improve the working life of described leather cup.
Preferably, between described pressing plate and described leather cup, be provided with locating piece, a side relative with described locating piece at described pressing plate forms positioning hole, a side relative with described pressing plate at described locating piece forms first projection that can embed in this positioning hole, a side relative with described leather cup at described locating piece forms second projection that can embed in described the first groove, forms the second through hole that is communicated with described the first through hole and described the first groove in this second projection.
Adopt said structure, owing to being provided with locating piece, the first projection by locating piece matches with the positioning hole of pressing plate, the second projection of locating piece matches with the first groove on described leather cup, can carry out supporting and location to described leather cup, make to form firmly and connect between this three of described leather cup, locating piece and pressing plate, be conducive to improve the overall steadiness of described piston.
Preferably, the intermediate portion of the side that described pressing plate is relative with described leather cup is towards recessed away from described leather cup side, the ring projection of being a bit larger tham the external diameter of described cylindrical part to form internal diameter, this ring projection is connected to the outside of described cylindrical part, described the first groove is positioned in the part relative with described ring projection of described leather cup, and described the first through hole and positioning hole are all formed at described ring high spot.
Preferably, on the external peripheral surface of described pressing plate, be provided with three groove recessed towards the radially inner side of described piston.
Adopt said structure, can receive the silt between the inboard wall of cylinder liner face that a dress part enters described piston and slurry pump by the 3rd groove on described pressing plate external peripheral surface, hinder the gap of this part silt flow between described piston and inboard wall of cylinder liner face and with other silt convection current.
Preferably, form on the top of described cylindrical part towards away from the second recessed groove of described pressing plate side.
Adopt said structure, owing to being provided with described the second groove, this second groove has a cavity conventionally, can reduce the material consumption of the described piston main body of preparation and reduce its weight, can either reduce costs the trouble-free operation that can also guarantee slurry pump.
Preferably, on the external peripheral surface of described piston main body and described leather cup, be embedded with fastening piece in the two place of connecting, on the external peripheral surface of this fastening piece, be provided with four groove recessed towards the radially inner side of described piston.
Adopt said structure, by described fastening piece, described leather cup is carried out to supporting and location, and described leather cup is tightened together with described piston main body, be conducive to improve connectivity robustness between the two, thereby improve the overall steadiness of described piston.Can receive the silt between the inboard wall of cylinder liner face that a dress part enters described piston and slurry pump by the 4th groove of the external peripheral surface at described fastening piece, hinder the gap of this part silt flow between described piston and inboard wall of cylinder liner face and with other silt convection current.
Preferably, described fastening piece is cylindric, and the external diameter of this fastening piece is greater than the external diameter of described piston main body.
Adopt said structure, because the external diameter of described fastening piece is greater than the external diameter of described piston main body, the external peripheral surface of described fastening piece is protruded with respect to the external peripheral surface of described piston main body, in the time there is eccentric motion in the axial direction with respect to the cylinder sleeve of slurry pump in described piston, described fastening piece is contacted with the inboard wall of cylinder liner face of slurry pump, can avoid described piston main body directly to contact with inboard wall of cylinder liner face and cause wearing and tearing, be conducive to improve the working life of described piston main body, and then improve the working life of described piston.
Preferably, the lip corner degree of described leather cup is 87 °.
Be compared with 65 ° with the lip corner degree of existing leather cup, adopt said structure, because the lip corner degree of described leather cup is 87 °, increase the thickness of described leather cup lip limit wedge angle, thereby effectively improve the cylinder sleeve of described leather cup lip limit and slurry pump in the operating mechanical strength of friction, the working life that has strengthened its wear resistance and be conducive to improve described leather cup.
Preferably, described piston is received and is contained in the cylinder sleeve of slurry pump, and the nominal diameter that the external diameter of described piston main body is this cylinder sleeve deducts 4mm.
The nominal diameter that is cylinder sleeve with the external diameter of existing piston main body deducts compared with 0.3mm, adopt said structure, the nominal diameter that is cylinder sleeve due to the external diameter of described piston main body deducts 4mm, increase the gap between described piston main body and inboard wall of cylinder liner face, can avoid between piston main body and inboard wall of cylinder liner face, producing in running wearing and tearing.
Accompanying drawing explanation
Fig. 1 is the structural representation of mud Piston for pump.
Embodiment
Below with reference to Fig. 1, the embodiment of mud Piston for pump described in the utility model is described in detail.In following description, before piston (afterwards) end corresponding under in Fig. 1 (on) end.
As shown in Figure 1, mud Piston for pump mainly comprises piston main body 1, be sleeved on leather cup 3 on this piston main body 1, be positioned at pressing plate 5 on this leather cup 3, be configured in the fastening piece 2 on piston main body 1 and leather cup 3, and is configured between leather cup 3 and pressing plate 5 and in order to be connected both locating pieces 4.
In the present embodiment, piston main body 1 is made up of at least one material in cast iron, iron and steel, ferro-alloy, and this piston main body 1 is commonly called the steel core of piston, and the nominal diameter of the cylinder sleeve that its external diameter is slurry pump deducts 4mm.Piston main body 1 has near a side of piston rod the cylindrical protrusions that external diameter is less than the external diameter of piston main body 1 between two parties, forms thus a stepped part.On piston main body 1, be provided with the mounting hole 1a that runs through this cylindrical protrusions and piston main body 1 along the axis of aforementioned cylindrical protrusions, form the cylindrical part 11 in the utility model by the cylindrical protrusions that is provided with this mounting hole 1a.Piston main body 1 generally runs through from front to back this mounting hole 1a by nut and is tightened on the corresponding mounting hole of piston rod and is secured on piston rod.On the end face of the top (corresponding to the upper end in Fig. 1) of cylindrical part 11, form the second groove 11a, due to this second groove, 11a has a cavity conventionally, can reduce the material consumption of piston main body 11 and reduce its weight, being conducive to reduce costs the trouble-free operation that can also guarantee slurry pump.
The ring plate-shaped member of locating piece 4 for being made up of wear resistant nylon material, it is positioned at the top of leather cup 3 and is sleeved in aforementioned cylindrical part 11.A side relative with leather cup 3 at locating piece 4 forms second projection 42 that can embed in the first groove 31, and the circumferencial direction along locating piece 4 in this second projection 42 forms the second through hole 43 being communicated with the first groove 31.Be symmetrically formed a pair of the first projection 41 in a side relative with following pressing plate 5 of locating piece 4, at piston in the radial direction, this first projection 41 is positioned at the radially inner side of the second through hole 43, i.e. a side of close cylindrical part 11.
The ring plate-shaped member of pressing plate 5 for being made by ferrous materials, as shown in Figure 1, the external diameter of this pressing plate 5 is slightly smaller than the external diameter of locating piece 4, the external diameter of this locating piece 4 is less than the external diameter of leather cup 3, like this, can avoid pressing plate 5 and/or locating piece 4 directly to contact with mud slurry pump cylinder jacket internal face and produce wearing and tearing.The intermediate portion of pressing plate 5 upward (away from leather cup 3 sides) is recessed, forms thus the ring projection 53 that internal diameter is a bit larger tham cylindrical part 11 external diameters.In ring projection 53, be uniformly-spaced provided with 13 the first through holes 51 along its circumferencial direction, this first through hole 51 is aimed at and is communicated with the second through hole 43.On the front surface (i.e. a side relative with leather cup 3) of ring projection 53, be symmetrically formed a pair of positioning hole 52, this positioning hole 52 is positioned at the radially inner side of the first through hole 51 and matches with the first projection 41 on locating piece 4.
Under installment state, pressing plate 5 is positioned at the top of cylindrical part 11 and both keep coaxial setting, ring projection 53 is stuck on the external peripheral surface of cylindrical part 11, and the top end face of cylindrical part 11 contacts with the planar section that is positioned at ring projection 53 radially inner sides of pressing plate 5; The first projection 41 of locating piece 4 embeds in the positioning hole 52 of pressing plate 5, the second projection 42 of locating piece 4 embeds in the first groove 31 of leather cup 3, the first through hole 51, the second through hole 43 and the first groove 31 are aimed at successively and are communicated with, thus, by locating piece 4, leather cup 3 and pressing plate 5 are firmly linked together.In addition, as shown in Figure 1, on the external peripheral surface of pressing plate 5, be also provided with the 3rd groove 54.
Describe below in conjunction with said structure, the working principle of piston is simply described.Be specially: piston is with respect to the cylinder sleeve of slurry pump forward when (direction that the compression chamber of slurry pump is diminished) motion, high pressure silt fluid in slurry pump first through hole 51 of flowing through enters in the first groove 31, utilize the silt fluid high-pressure in the first groove 31 to produce a tension force to the lip limit of leather cup 3, leather cup lip limit external diameter is increased, leather cup 3 contacts closely with the internal face of mud slurry pump cylinder jacket, is conducive to guarantee the sealing effect of leather cup 3 to slurry pump compression chamber; Piston (makes the compression chamber of slurry pump become large direction) when motion with respect to the cylinder sleeve of slurry pump backward, negative pressure in the cylinder sleeve of slurry pump is by the silt fluid expulsion in the first groove 31, the lip limit tension force of leather cup 3 is diminished, leather cup 3 restores, can reduce the wearing and tearing between the inboard wall of cylinder liner face of leather cup 3 and slurry pump, by upper, by interior first groove 31 that arranges of leather cup 3, can guarantee that the sealing effect of piston is conducive to again improve the working life of leather cup.
By being positioned at the 4th groove 21 on the external peripheral surface of the 3rd groove 54 on pressing plate 5 external peripheral surfaces, fastening piece 2, can receive the silt between the inboard wall of cylinder liner face that feed into piston and slurry pump, hinder the gap of this part silt flow between piston and inboard wall of cylinder liner face and with other silt convection current.
In addition, adopt said structure, 1) be greater than the external diameter of piston main body 1 due to the external diameter of fastening piece 2, the external peripheral surface of fastening piece 2 is protruded with respect to the external peripheral surface of piston main body 1, like this, even when piston in the axial direction eccentric motion occurs with respect to the cylinder sleeve of slurry pump, fastening piece 2 contacts and weares and teares with the inboard wall of cylinder liner face of slurry pump, can avoid piston main body 1 directly to contact with inboard wall of cylinder liner face and cause wearing and tearing, the working life that is conducive to improve piston.In addition, because fastening piece 2 is nylon products, compared with the friction of inboard wall of cylinder liner face, can reduce the extent of damage of piston and cylinder sleeve with the piston main body 1 of being made by iron and steel material quality.2) be compared with 65 ° with the lip corner degree of existing leather cup 3, adopt said structure, because the lip corner degree of leather cup 3 is 87 °, increase the thickness of leather cup lip limit wedge angle, thereby effectively improve the cylinder sleeve of leather cup lip limit and slurry pump in the operating mechanical strength of friction, strengthen its wear resistance, thereby be conducive to improve the working life of leather cup 3; 3) nominal diameter that is cylinder sleeve with the external diameter of existing piston main body 1 deducts compared with 0.3mm, the nominal diameter that is cylinder sleeve due to the external diameter of piston main body 1 deducts 4mm, increase the gap between piston main body 1 and inboard wall of cylinder liner face, effectively avoided between piston main body 1 and inboard wall of cylinder liner face, producing in running wearing and tearing.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
For example, in the above-described embodiments, the first groove 31 is along the circumferencial direction setting of leather cup 3, and the first through hole 51 is that 13 and they arrange along the circumferencial direction interval of ring projection 53, and the second through hole 43 is along the circumferencial direction setting of locating piece 4.But aforementioned three is not limited thereto, for example, the first through hole 51 also can be formed on the whole circumferencial direction of ring projection 53, is not limited to 13; The first groove 31 and the second through hole 43 also can be around circumferencial direction spaced multiple, concrete set-up mode and the number of the first through hole 51, the second through hole 43 and the first groove 31 do not limit, as long as this three meets the relation being communicated with successively from top to bottom.
Again for example, piston main body 1 and pressing plate 5 are made up of ferrous materials, and leather cup 3 is rubber part, and fastening piece 2 and locating piece 4 are made up of wear resistant nylon material, but not limited thereto, and these parts also can adopt other materials of the prior art to make.
Claims (10)
1. a mud Piston for pump, described piston is fixed on the end of piston rod, described piston comprises piston main body (1), is sleeved on the leather cup (3) on this piston main body (1), and be configured in the pressing plate (5) of this leather cup (3) top, it is characterized in that, described piston main body (1) has near a side of described piston rod the cylindrical part (11) that external diameter is less than the external diameter of described piston main body (1), and described leather cup (3) is sleeved in this cylindrical part (11).
2. mud Piston for pump according to claim 1, it is characterized in that, form the first groove (31) in described leather cup (3) side relative with described pressing plate (5), at upper the first through hole (51) that runs through and be communicated with described the first groove (31) along its thickness direction that forms of described pressing plate (5).
3. mud Piston for pump according to claim 2, it is characterized in that, between described pressing plate (5) and described leather cup (3), be provided with locating piece (4), a side relative with described locating piece (4) at described pressing plate (5) forms positioning hole (52), a side relative with described pressing plate (5) at described locating piece (4) forms first projection (41) that can embed in this positioning hole (52)
A side relative with described leather cup (3) at described locating piece (4) forms second projection (42) that can embed in described the first groove (31), at upper the second through hole (43) that is communicated with described the first through hole (51) and described the first groove (31) that forms of this second projection (42).
4. mud Piston for pump according to claim 3, it is characterized in that, the intermediate portion of the side that described pressing plate (5) is relative with described leather cup (3) is towards recessed away from described leather cup (3) side, the ring projection (53) of being a bit larger tham the external diameter of described cylindrical part (11) to form internal diameter, this ring projection (53) is connected to the outside of described cylindrical part (11)
Described the first groove (31) is positioned in the part relative with described ring projection (53) of described leather cup (3), and described the first through hole (51) and positioning hole (52) are all formed at described ring projection (53) and locate.
5. mud Piston for pump according to claim 1, is characterized in that, is provided with three groove (54) recessed towards the radially inner side of described piston on the external peripheral surface of described pressing plate (5).
6. mud Piston for pump according to claim 1, is characterized in that, forms towards away from recessed the second groove (11a) of described pressing plate (5) side on the top of described cylindrical part (11).
7. mud Piston for pump according to claim 1, it is characterized in that, on the external peripheral surface of described piston main body (1) and described leather cup (3), be embedded with fastening piece (2) in the two place of connecting, on the external peripheral surface of this fastening piece (2), be provided with four groove (21) recessed towards the radially inner side of described piston.
8. mud Piston for pump according to claim 7, is characterized in that, described fastening piece (2) is cylindric, and the external diameter of this fastening piece (2) is greater than the external diameter of described piston main body (1).
9. mud Piston for pump according to claim 1, is characterized in that, the lip corner degree of described leather cup (3) is 87 °.
10. mud Piston for pump according to claim 1, is characterized in that, described piston is received and is contained in the cylinder sleeve of slurry pump, and the nominal diameter that the external diameter of described piston main body (1) is this cylinder sleeve deducts 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320798306.7U CN203604189U (en) | 2013-12-06 | 2013-12-06 | Piston for slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320798306.7U CN203604189U (en) | 2013-12-06 | 2013-12-06 | Piston for slurry pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203604189U true CN203604189U (en) | 2014-05-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320798306.7U Expired - Fee Related CN203604189U (en) | 2013-12-06 | 2013-12-06 | Piston for slurry pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203604189U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948606A (en) * | 2015-05-25 | 2015-09-30 | 浙江诸暨万宝机械有限公司 | Piston device |
-
2013
- 2013-12-06 CN CN201320798306.7U patent/CN203604189U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948606A (en) * | 2015-05-25 | 2015-09-30 | 浙江诸暨万宝机械有限公司 | Piston device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20141206 |
|
| EXPY | Termination of patent right or utility model |