CN1172782C - Method for making rubber-lined stator or screw oil pump - Google Patents
Method for making rubber-lined stator or screw oil pump Download PDFInfo
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- CN1172782C CN1172782C CNB02137144XA CN02137144A CN1172782C CN 1172782 C CN1172782 C CN 1172782C CN B02137144X A CNB02137144X A CN B02137144XA CN 02137144 A CN02137144 A CN 02137144A CN 1172782 C CN1172782 C CN 1172782C
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- rubber
- steel pipe
- injecting glue
- lined
- oil pump
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Abstract
The present invention relates to a method for making the rubber-lined stator of a screw oil pump by using a transfer molding technology. The present invention is characterized in that rubber inlet holes with threads are arranged on a steel pipe wall in the middle position of a steel pipe to be lined with rubber; rubber materials flowing out of a rubber injection cylinder by injection press flow to both ends of the steel pipe through the rubber inlet holes along the inner wall of the steel pipe and a gap among a mold core in the steel pipe under the action of the pressure of a presser so as to complete rubber-lined molding work; and after the rubber inlet holes are blocked by corresponding screw nails, a rubber-lined semi-product is sent to a vulcanizing boiler to be vulcanized. The rubber inlet holes are symmetrically arranged on a flat along the axial central line of the steel pipe and vertical to the moving direction of the piston of the rubber injection cylinder, and then, the presser passes through an injection press cylinder. The mold core, the steel pipe and the rubber injection cylinder are preheated by the temperature of 70 to 110 DEG C before rubber injection. The method can be used for producing products with longer specifications by lower pressure and can eliminate the frequent occurrence of disposable products caused by underfill rubber injection when a traditional method is used.
Description
Technical field
The present invention relates to oil field oil recovery equipment---a vitals in the progressive cavity pump, the i.e. manufacture method of rubber-lined stator.
Background technique
Progressive cavity pump is to be used for the well recovery later stage, after oilbearing stratum pressure reduces, for remaining crude oil in deep under ground being drawn on the ground equipment of using to improve well oil output.Its total is at an elongated inner lining of steel pipe last layer rubber, the internal surface of this line with rubber layer is shape of threads, form rubber-lined stator, when as the threaded screw rod of rotor in this stator during high speed rotating, form higher lifting force at the thread inner surface of rubber-lined stator and the gap location between the rotor screw thread, can be the crude oil more than underground km, extracting comes to ground.This oil well pump is compared with other oil well pump, have simple in structure, easy to use, economize characteristics such as energy consumption.Along with the development in oil field, oil well is more and more darker, and this product also develops to longer thicker direction.If early stage product, length generally is no more than 3 meters, and all about 3.5-8 rice, internal diameter also by being no more than 90mm originally, develops to the 110mm direction then present its specification.
Rubber line with rubber in this product itself has the high temperature of oil resistant, wear-resisting, anti-oilbearing stratum depths except requiring the rubber material, also requires the adherence of rubber and metal steel pipe good, the consistency height of material.This is because progressive cavity pump will in depth descend more than the km, and very trouble is changed in its installation, so the life-span that progressive cavity pump is wished in the industry of recovering the oil, the longer the better; In the using process of pump, in case rubber and metal take place to break away from or some wearing and tearing of rubber layer, will directly have influence on cooperating intermittently between stator and the rotor, pump efficiency will descend, even loses efficacy.Therefore, line with rubber technology has fundamental influence to the quality of this product.
At present the method for modeling rubber product mainly contains: three kinds of molded vulcanizations, shifting formwork sulfuration, injection sulfurization are (referring to " rubber processing basic technology ", compile at Deparmnent of Personnel and Education of the Ministry of Chemical Industry, the Ministry of Chemical Industry educational training center, Chemical Industry Press, in July, 1997, P293); For the rectangular specification resemble the rubber-lined stator or screw oil pump, the product that configuration is very complicated again is because device-restrictive obviously is not suitable for die pressing or injection molding production, and can only adopts the transfer molding technology.Transfer molding is called die casting or shifting formwork method again, and this method is that preprepared sizing material is contained in the injecting glue cylinder that is positioned at model top, under strong pressure sizing material is pressed into die cavity, moves into sulfurizing pot vulcanization then.At present shape more complicated and the physical and mechanical properties rubber-metal goods of having relatively high expectations all adopt this method produce (referring to " rubber processing ", Beijing Chemical Engineering College etc. compile in collaboration with, the Chen Yaoting chief editor, Chemical Industry Press, November nineteen eighty-two, P266).
When adopting this method to produce rubber-lined stator or screw oil pump, at first be to become the rectangular core rod of certain screw thread form to form die cavity in the surperficial car in treating Rubber Lined Steel Pipe (stator steel pipe) and inserting steel pipe in the past.Annotating piston in the cylinder pressure is contained in the injecting glue cylinder sizing material following of the crunch effect of press flat board and extrudes from the hole for injecting glue of injecting glue cylinder, sizing material is along the runner of injecting glue mould, enter in the die cavity of steel pipe and core rod composition from an end of stator steel pipe, slowly flow to the other end of stator steel pipe, fill full whole die cavitys until sizing material, transfer sulfurizing pot vulcanization again.This technology will allow sizing material flow to the other end from an end of stator steel pipe, whole flow process is longer, the surface friction drag that is subjected to steel pipe inwall and core surface on the way is bigger, and this resistance is along with the increase of steel pipe length, and between steel pipe inwall and the core surface gap minimizing and increase.For overcoming this resistance, have to increase injecting glue pressure.So, not only energy consumption is bigger, and equipment is subject to damage also, and injecting glue often occurs not to the end, can not be full of die cavity or the adhesion of rubber to metal that will be coated in advance on the steel pipe inwall sticks with glue phenomenons such as agent washes away, and causes waster.
Summary of the invention
The present invention is intended to overcome traditional above-mentioned shortcoming with transfer molding technology manufacturing rubber-lined stator or screw oil pump, provide a kind of and can reduce sizing material length of flow in die cavity, thereby reduce the sizing material flow resistance, in order to do the technological method that can just can successfully produce the long size rubber-lined stator of high-quality with the press or the lower pressure of less tonnage.
The present invention realizes like this, be that it is a kind of manufacture method of using the rubber-lined stator or screw oil pump of transfer molding technology, it is characterized in that, threaded glue feeding opening is set on the steel pipe walls for the treatment of the Rubber Lined Steel Pipe intermediate portion, under the effect of press pressure, annotated the sizing material that baric flow goes out from the injecting glue cylinder, by this glue feeding opening, flow to the steel pipe two ends along steel pipe inwall and the gap that is arranged between the core rod in the steel pipe, finish the operations for forming of line with rubber, behind corresponding screw obstruction glue feeding opening, send sulfurizing pot vulcanization with the line with rubber semi-finished product.
Because the present invention has changed the method for a traditional end from the stator steel pipe to the other end injecting glue, change centre from steel pipe to the two ends injecting glue, therefore the flow path of sizing material has reduced 1/2 than traditional method, simultaneously because sizing material is the expansion of flowing towards both sides in die cavity, its flow area has enlarged one times, so the flow resistance of sizing material obviously reduces, thereby can be difficult to achieve the long size rubber-lined stator of full injecting glue with lower pressure production with the press of less tonnage in the past.In addition, since be arranged on the steel pipe walls glue feeding opening in advance car screw thread is arranged, so after finishing the injecting glue operation, can be the glue feeding opening obstruction firmly with the screw of corresponding specification, thereby guaranteed the integrity and the sealing of die cavity in follow-up vulcanization process, guaranteed to obtain densification and the line with rubber layer of high-quality.Described glue feeding opening size is preferably 8-24mm, and glue feeding opening is too small, and the inflow resistance of sizing material is bigger, and is unfavorable to the injecting glue operation; Glue feeding opening is excessive, might undermine the intensity of steel pipe.Squeeze core rod askew when preventing that sizing material from flowing into die cavity under strong pressure, specially glue feeding opening is arranged on symmetrically along on steel pipe longitudinal center line and the plane perpendicular to injecting glue cylinder piston motion direction, so, when sizing material flows into from the glue feeding opening of relative configuration, act on core rod power direction in opposite directions, cancel out each other, askew with regard to not pressing core rod, assurance obtains the line with rubber of correct configuration.The quantity of glue feeding opening is generally a pair of, and promptly two, long especially for size, and the compound viscosity condition with higher, can be provided with nearly four pairs, i.e. eight glue feeding openings, glue feeding opening quantity too much may undermine steel strength.
In order further to promote sizing material flowing in die cavity, guarantee the full whole die cavity of sizing material filling, utilize the sizing material characteristics that viscosity can reduce when being heated, using press by before the injecting glue cylinder injecting glue, should be with 70--110 ℃ of preheating core rod, steel pipe and injecting glue cylinder.Preheating temperature is low excessively, DeGrain, and preheating temperature is too high, and the worry of the sizing material of causing incipient scorch is arranged, so all be not suitable for.Certainly, in order to ensure the flowability of sizing material in die cavity, the viscosity of sizing material itself also must suitably be controlled, and promptly its Mooney viscosity is preferably the (ML into 10-55
1+4, 100 ℃), viscosity is low excessively, can not guarantee that the line with rubber layer has enough intensity and wear resistance; Viscosity is too high, and sizing material is difficult for flowing in die cavity.After having taked above-mentioned measure, the tonnage of the used press of injecting glue is 300-500t, and is just enough, and the used pressure of injecting glue also needn't reach the limiting value of press, helps the maintenance of equipment and saves energy consumption.
Once adopting the present invention's method to come production specification is the rubber-lined stator or screw oil pump of 100 * 1800mm, and the result is, adopts 500 tons of press same, apply under the condition of 350t pressure, adopt traditional single-ended injecting glue technology, the injecting glue time needed more than 25 minutes, and the waster rate is about 8%; Adopt the present invention's technological method, the injecting glue time only needs 12 minutes, does not occur basically because of the not enough waster that forms of injecting glue.
Further specify the present invention below in conjunction with embodiment, but the present invention is in no way limited to these embodiments.
Description of drawings:
Fig. 1 is the schematic representation that adopts this technological method;
Fig. 2 adopts traditional single-ended injecting glue process schematic representation;
Fig. 3 is the axial section schematic representation for the treatment of Rubber Lined Steel Pipe 7 among Fig. 1 and 2, there is shown the die cavity of being made up of steel pipe and core rod;
Fig. 4 is an A-A sectional schematic diagram among Fig. 1.
Label among the figure is: 1-press upper surface plate; 2-injecting glue cylinder piston; 3-injecting glue cylinder; The 4-sizing material; 5-injecting glue cylinder glue discharging opening; 6-sizing material runner; 7-treats Rubber Lined Steel Pipe (stator steel pipe); The 8-press is dull and stereotyped down; 9-annotates pressing mold; 10-manages glue feeding opening; The 11-die cavity; The 12-core rod.The flow direction of the arrow indication sizing material among the figure.
Embodiment
Embodiment 1-4 and comparative example 1-2 are referring to table 1.
Employing is that the nitrile butadiene rubber of 30-35% is the basis with the bound acrylonitrile content, add suitable bulking agent, plasticizing agent, age resister and be that the vulcanizing system of representative is mixed with elastomeric compound with sulfenamide type accelerators-Sulfur, after parking 1-2 days, this elastomeric compound is through suitable freshening, slice becomes film, drop in the injecting glue cylinder, adopt 500 tons of press, carry out the injecting glue operation respectively by the technological method of the present invention (embodiment 1-4) shown in Fig. 1 and 2 and traditional injecting glue technology (comparative example 1-2), send sulfurizing pot vulcanization then.Related technical parameters and injecting glue effect are as shown in table 1.
By this table as seen, adopt the effect of the inventive method obvious, that is:
1) can use lower pressure to produce product, help corrective maintenance, energy efficient than long size;
2) can make the abundant loading mould cavity of sizing material, being discontented with because of injecting glue of often occurring in the time of can not using conventional method causes waster;
3) reduce the injecting glue time, improved labour productivity.
The inventive method principle also can be used for making the rectangular rubber-metal of other similar complex configuration in conjunction with goods.
Table 1
| | Embodiment | 1 | | Embodiment 3 | | Comparative example 1 | Comparative example 2 |
| Treat Rubber Lined Steel Pipe length, mm | 3480 | 4080 | 6452 | 7320 | 3480 | 4080 | |
| Treat the Rubber Lined Steel Pipe diameter, mm | 89 | 73 | 114 | 89 | 89 | 73 | |
| Sizing material Mooney viscosity (ML 1+4，100℃) | 45 | 30 | 30 | 15 | 30 | 45 | |
| The glue feeding opening diameter, mm | 16 | 22 | 20 | 8 | -- | -- | |
| Glue feeding opening quantity, individual (to) | 2(1) | 2(1) | 4(2) | 8(4) | -- | -- | |
| Injecting glue cylinder preheating temperature, ℃ | 70 | 70 | 80 | 95 | 80 | 80 | |
| The core rod preheating temperature, ℃ | 90 | 90 | 95 | 100 | 100 | 100 | |
| The steel pipe preheating temperature, ℃ | 70 | 70 | 80 | 90 | 80 | 80 | |
| The injecting glue amount, | 10 | 13 | 32 | 28 | 10 | 13 | |
| Injecting glue pressure, t | 300 | 350 | 330 | 400 | 500 | 500 | |
| The injecting glue time, min | 20 | 30 | 40 | 50 | 55 | 80 | |
| The injecting glue effect | Satisfied | Satisfied | Satisfied | Satisfied | Still can | Have the discontented phenomenon of injecting glue |
Claims (4)
1. manufacture method of using the rubber-lined stator or screw oil pump of transfer molding technology, it is characterized in that, threaded glue feeding opening [10] is set on the steel pipe walls for the treatment of Rubber Lined Steel Pipe [7] intermediate portion, under the effect of press pressure, annotated the sizing material [4] that baric flow goes out from injecting glue cylinder [3], by this glue feeding opening [10], flow to the steel pipe two ends along steel pipe inwall and the gap that is arranged between the core rod [12] in the steel pipe, finish the operations for forming of line with rubber, behind corresponding screw obstruction glue feeding opening [10], send sulfurizing pot vulcanization with the line with rubber semi-finished product, described glue feeding opening [10] is the with threaded hole of Φ 8-24mm, and be arranged on symmetrically along on steel pipe [7] longitudinal center line and the plane perpendicular to injecting glue cylinder piston motion direction, hole count is that 1-4 is right.
2. the manufacture method of rubber-lined stator or screw oil pump as claimed in claim 1 is characterized in that, is using press by before injecting glue cylinder [3] injecting glue, with 70--110 ℃ of preheating core rod [12], steel pipe [7] and injecting glue cylinder [3].
3. the manufacture method of rubber-lined stator or screw oil pump as claimed in claim 1 or 2 is characterized in that, is used for the Mooney viscosity of the sizing material of injecting glue, ML
1+4, 100 ℃, be 10-55.
4. the manufacture method of rubber-lined stator or screw oil pump as claimed in claim 1 or 2 is characterized in that, the press tonnage that is used for injecting glue is 300-500t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02137144XA CN1172782C (en) | 2002-09-25 | 2002-09-25 | Method for making rubber-lined stator or screw oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02137144XA CN1172782C (en) | 2002-09-25 | 2002-09-25 | Method for making rubber-lined stator or screw oil pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1443638A CN1443638A (en) | 2003-09-24 |
| CN1172782C true CN1172782C (en) | 2004-10-27 |
Family
ID=27811335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB02137144XA Expired - Lifetime CN1172782C (en) | 2002-09-25 | 2002-09-25 | Method for making rubber-lined stator or screw oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1172782C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101637955B (en) * | 2009-08-07 | 2011-08-31 | 南京金三力橡塑有限公司 | Bidirectional injection moulding method of stator rubber of screw drilling tools |
| CN102862263A (en) * | 2012-09-12 | 2013-01-09 | 胜利油田长龙橡塑有限责任公司 | Glue injection method for rubber stator of equal-wall thickness screw pump |
| EP2998584B1 (en) * | 2014-09-16 | 2017-04-05 | NETZSCH Pumpen & Systeme GmbH | Stator for an eccentric screw pump, eccentric screw pump, and a method for manufacturing a stator |
-
2002
- 2002-09-25 CN CNB02137144XA patent/CN1172782C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1443638A (en) | 2003-09-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI RUBBER PRODUCT INSTITUTE CO., LTD. Free format text: FORMER NAME: SHANGHAI RUBBER PRODUCTS INST.;SHANGHAI RUBBER PRODUCTS INST. |
|
| CP03 | Change of name, title or address |
Address after: 200052 No. 381, Panyu Road, Shanghai, Changning District Patentee after: SHANGHAI INSTITUTE OF RUBBER PRODUCTS Co.,Ltd. Address before: 200052 No. 381, Panyu Road, Shanghai Patentee before: Shanghai Institute of Rubber Products |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210205 Address after: No. 1251, Zhulu West Road, Xujing Town, Qingpu District, Shanghai, 201702 Patentee after: SHANGHAI PLASTICS RESEARCH INSTITUTE Co.,Ltd. Address before: 200052 No. 381, Panyu Road, Shanghai, Changning District Patentee before: SHANGHAI INSTITUTE OF RUBBER PRODUCTS Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20041027 |