CN115521562B - High-temperature-resistant packer sealing rubber cylinder and preparation method thereof - Google Patents
High-temperature-resistant packer sealing rubber cylinder and preparation method thereof Download PDFInfo
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- CN115521562B CN115521562B CN202211498022.6A CN202211498022A CN115521562B CN 115521562 B CN115521562 B CN 115521562B CN 202211498022 A CN202211498022 A CN 202211498022A CN 115521562 B CN115521562 B CN 115521562B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/28—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
- B29B7/283—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control measuring data of the driving system, e.g. torque, speed, power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
- B29B7/726—Measuring properties of mixture, e.g. temperature or density
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
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- B29B7/7495—Systems, i.e. flow charts or diagrams; Plants for mixing rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0053—Producing sealings
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
A high-temperature-resistant packer sealing rubber cylinder and a preparation method thereof are disclosed, wherein the high-temperature-resistant packer sealing rubber cylinder comprises the following components in parts by mass: type 100H tetrapropylene fluorocarbon rubber; 100S type tetrapropylene fluorocarbon rubber; carbon black of type N990; carbon black of type N774; calcium stearate; type 70% TAIC;60% type Shuangerwu; containing GeO 2 The graphene of (4). A preparation method of a high-temperature-resistant packer sealing rubber sleeve comprises the following steps: preparing materials, banburying, open mixing, cutting, vulcanizing and forming; the temperature resistance of the sealing rubber cylinder can reach 235 ℃, and the pressure resistance can reach 105MPa; the premix of carbon black and rubber is convenient to carry out, and the materials in banburying are conveniently put into a banbury mixer in stages; the utilization rate of materials is improved; the more thorough feeding is realized, and the problem of mismatching of materials is reduced; so that the two rubbers are fully mixed; before the rubber mixing mechanism mixes, adjust all telescopic link length to two lengths.
Description
Technical Field
The invention belongs to the technical field of oil drilling, relates to a packer, and particularly relates to a high-temperature-resistant packer sealing rubber cylinder and a preparation method thereof.
Background
The packer is used as an important downhole tool in the drilling and production process of oil fields and gas fields and is used for sealing and isolating annular spaces of oil pipes and oil-gas well casings. In practical application, the final packing is realized by acting on the inner wall of the casing pipe after a sealing rubber sleeve on the packer deforms. At present, most packers can only be suitable for scenes with certain depth, cannot resist high temperature when facing deeper depth, and cannot be effectively used to achieve the packing effect, so that improvement is needed.
Disclosure of Invention
Aiming at the defects of the related prior art, the invention provides the high-temperature-resistant packer sealing rubber cylinder and the preparation method thereof, the formula of the rubber cylinder is improved, so that the high-temperature resistance of the sealing rubber cylinder can reach 235 ℃, the high-temperature-resistant packer sealing rubber cylinder can be applied to an oil well with the depth of more than 8000 m, the preparation process is improved, and the preparation quality of the sealing rubber cylinder is improved.
In order to realize the purpose of the invention, the following scheme is adopted:
a high-temperature-resistant packer sealing rubber barrel comprises the following components in parts by mass: 18-32 parts of 100H-type tetrapropylene fluoride rubber; 60-80 parts of 100S type tetrapropylene fluororubber; 18-32 parts of N990 type carbon black; 10-20 parts of N774 type carbon black; 0.5-2 parts of calcium stearate; 10 to 17 parts of 70% type TAIC (triallyl isocyanurate); 2-7 parts of 60% type Shuangerwu; containing GeO 2 7-14 parts of graphene.
Further, 30 parts of 100H type tetrapropylene fluoride rubber; 70 parts of 100S type tetrapropylene fluororubber; 30 parts of N990 type carbon black; 15 parts of N774 type carbon black; 1 part of calcium stearate; 13 parts of 70% type TAIC; 5 portions of 60 percent type Shuangerwu; containing GeO 2 The amount of the graphene is 10 parts.
A preparation method of a high-temperature-resistant packer sealing rubber sleeve comprises the following steps:
preparing materials: preparing raw materials of each component in parts by mass;
banburying: 100H type tetrapropylfluoride rubber, 100S type tetrapropylfluoride rubber, N990 type carbon black, N774 type carbon black and GeO-containing rubber 2 The graphene and the calcium stearate are put into an internal mixer for mixing, after the mixing is finished, rubber is discharged, and the discharged rubber is cooled on an open mill;
open smelting: preheating an open mill, adding 70% type TAIC and 60% type duo-di-V into the open mill after preheating is finished, carrying out open milling, and cooling after finishing;
cutting; cutting the material obtained after the open milling;
and (3) vulcanization molding: and putting the cut materials into a vulcanizing machine, and forming the high-temperature-resistant packer sealing rubber cylinder through a vulcanizing machine die.
Further, the banburying step specifically comprises:
premixing N990 type carbon black and N774 type carbon black to obtain mixed carbon black, and premixing 100H type tetrapropylene fluorocarbon rubber and 100S type tetrapropylene fluorocarbon rubber to obtain mixed rubber;
feeding for the first time: putting half of the mixed rubber and half of the mixed carbon black into an internal mixer, wherein the initial temperature of an internal mixing chamber of the internal mixer is 40-60 ℃, the rotating speed of a rotor is 35-50 r/min, and plastifying for 1-2 min after putting;
feeding for the second time: half of the mixture contains GeO 2 Putting the graphene and the rest mixed rubber into an internal mixer, and mixing for 1-1.5 min;
feeding for the third time: mixing the rest mixed carbon black and the rest GeO 2 Putting the graphene into an internal mixer, mixing for 5-8 min, controlling the temperature below 120 ℃ in the mixing process, turning the rubber for 2-3 times, and starting to discharge the rubber;
and transferring the rubber materials discharged from the internal mixer to an open mill within 1min for performing thin-pass cooling, and discharging and storing for 24h when the rubber materials are cooled to below 60 ℃.
The invention has the beneficial effects that:
1. the sealing rubber sleeve is a high-temperature packer rubber sleeve for the ultra-deep well, the temperature resistance of the sealing rubber sleeve can reach 235 ℃, and the pressure resistance of the sealing rubber sleeve can reach 105MPa;
2. by adopting the preparation method, through the two steps of banburying and open mixing, the raw material components are uniformly and fully mixed, so that the vulcanization forming effect is favorably improved, and the forming quality of the high-temperature-resistant packer sealing rubber cylinder is improved; part of the raw materials are mixed in advance, and are selectively put into an internal mixer at different time intervals, so that the temperature conditions of all stages and the characteristics of all materials can be fully utilized, and the internal mixing efficiency and the internal mixing homogenization effect can be improved;
3. the premixing and feeding of the banburying process section are carried out by adopting a premixing device, so that the premixing of carbon black and rubber is conveniently carried out, and the materials in the banburying are conveniently fed into the banbury mixer in stages;
4. the collecting hopper is matched with the blanking mechanism, so that preliminary premix of banburying materials can be realized, residual/retained materials on the blanking mechanism can be treated, the material utilization rate is improved, more thorough feeding is realized, and the problem of mismatching possibly existing after the materials enter the banburying machine after being retained too much due to incomplete and uniform mixing of the materials at the stage is reduced;
5. the rubber mixing mechanism is adopted for pre-mixing, so that the two rubbers can be fully mixed; before the rubber mixing mechanism is used for mixing, the lengths of all the telescopic rods can be adjusted to be two, and the telescopic rods with short lengths and the telescopic rods with long lengths are arranged at intervals, so that the vertical stirring rods can be positioned at different radial positions during stirring, and the stirring and mixing effects are improved; as the actual use condition, the lengths of the telescopic rods can be adjusted to be different or partially the same.
Drawings
FIG. 1 is a flow chart of a method of making an embodiment of the present application.
Fig. 2 is an overall structural view of a premix apparatus according to an embodiment of the present application.
Fig. 3 is an internal structure view of a rubber mixing mechanism according to an embodiment of the present application.
Fig. 4 is a structural view of a mixing cylinder and a rotating ring of the rubber mixing mechanism in the embodiment of the application.
Fig. 5 is a structure diagram of a telescopic rod and a vertical stirring rod of the rubber mixing mechanism in the embodiment of the application.
Fig. 6 is an enlarged view of a portion a of fig. 2.
Fig. 7 is a schematic view of a test scenario according to an embodiment of the present application.
FIG. 8 is a pressure/temperature-time graph of a test of one embodiment.
FIG. 9 is a photograph showing the test results of the samples of the first test in example one
FIG. 10 is a graph of pressure/temperature versus time for the tests of example two.
FIG. 11 is a photograph showing the test results of the samples tested in example two
FIG. 12 is a graph of the pressure retention at 235 ℃ for 7 days at 105MPa for the test of example three.
FIG. 13 is a graph of the V3 test (pressure reversal test) for the three tests of example.
FIG. 14 is a graph of a temperature drop performance test of the third example.
FIG. 15 is a graph of temperature-raising performance test of the third test of example.
FIG. 16 is a photograph showing the test results of the samples tested in the third example.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, but the embodiments described in the present invention are some, not all, of the embodiments of the present invention.
The embodiment of the application provides a high-temperature-resistant packer sealing rubber cylinder and a preparation method thereof.
Specifically, the sealing rubber cylinder comprises the following components in parts by mass: 18-32 parts of 100H-type tetrapropylene fluororubber; 60-80 parts of 100S type tetrapropylene fluororubber; 18-32 parts of N990 type carbon black; 10-20 parts of N774 type carbon black; 0.5-2 parts of calcium stearate; 10-17 parts of 70% type TAIC; 2-7 parts of 60% type Erwu; 7-14 parts of graphene containing GeO 2.
Example one
The preparation was carried out according to the scheme shown in FIG. 1.
Preparing materials: preparing raw materials of each component in parts by mass. Specifically, the following raw materials are prepared according to the following parts by mass: 30 parts of 100H-type tetrapropylene fluoride rubber; 70 parts of 100S type tetrapropylene fluoride rubber; 30 parts of N990 type carbon black; 15 parts of N774 type carbon black; 1 part of calcium stearate; 13 parts of 70% type TAIC; 5 portions of 60 percent type Shuangerwu; containing GeO 2 The amount of graphene (2) is 10 parts.
Banburying: 100H type tetrapropylene fluoride rubber, 100S type tetrapropylene fluoride rubber, N990 type carbon black, N774 type carbon black and GeO-containing rubber 2 And (3) putting the graphene and the calcium stearate into an internal mixer for mixing, discharging rubber after the mixing is finished, and cooling the discharged rubber on an open mill.
Open mixing: preheating the open mill, adding 70% type TAIC and 60% type Shuangerwu into the open mill after preheating, carrying out open milling, and cooling after finishing.
Cutting; and cutting the material obtained after the open milling.
And (3) vulcanization molding: and putting the cut materials into a vulcanizing machine, and forming the high-temperature-resistant packer sealing rubber cylinder through a vulcanizing machine die.
The high-temperature-resistant packer sealing rubber sleeve of the first embodiment is tested, the test scenario is shown in fig. 7, and the test conditions are as follows:
1) The test maximum temperature is 235 ℃;
2) The medium used by the test shaft is hydraulic oil or Kunlun KSQB300 heat conduction oil;
3) Setting and pressing load: setting force 22T;
4) And a test sleeve: a special phi 139.7mm sleeve (inner diameter 114.3 mm);
5) Gradually pressurizing to 30MPa, 50 MPa, 70MPa, 90 MPa and 105MPa, and stabilizing the pressure for 15min at each stage;
6) If the pressure is successfully stabilized by the pressure difference of 105MPa, carrying out a test of maintaining the pressure for 7 days;
7) If the pressure maintaining is successful in 7 days, continuing to carry out the V3 test;
8) And after the V3 test is finished, performing a temperature rise and fall test.
The pressure/temperature-time curve of the test, as shown in fig. 8, shows the following results: the test is carried out to the step 6), pressure maintaining is started, when the test is carried out for 24 hours, the pressure is lost instantly, and the rubber cylinder is broken after being taken out, as shown in figure 9.
The test conclusion shows that the high-temperature-resistant packer sealing rubber sleeve can meet the application requirement of high temperature resistance of 235 ℃, and successfully stabilize the pressure at 105MPa pressure difference, thereby meeting the basic design requirement.
Example two
The preparation was carried out according to the scheme shown in FIG. 1.
Preparing materials: preparing raw materials of each component in parts by mass. Specifically, the preparation method comprises the following steps of: 18 parts of 100H-type tetrapropylene fluororubber; 60 parts of 100S type tetrapropylene fluorocarbon rubber; 18 parts of N990 type carbon black; 10 parts of N774 type carbon black; 0.5 part of calcium stearate; type 70% TAIC,10 parts(ii) a 2 parts of 60% type Shuangerwu; containing GeO 2 7 parts of graphene.
Banburying: 100H type tetrapropylene fluoride rubber, 100S type tetrapropylene fluoride rubber, N990 type carbon black, N774 type carbon black and GeO-containing rubber 2 And (3) putting the graphene and the calcium stearate into an internal mixer for mixing, discharging rubber after the mixing is finished, and cooling the discharged rubber on an open mill.
Open mixing: preheating an open mill, adding 70% type TAIC and 60% type Shuangdi-Wu into the open mill after preheating, performing open milling, and cooling after completing.
Cutting; and cutting the material obtained after the open milling.
And (3) vulcanization molding: and putting the cut materials into a vulcanizing machine, and forming the high-temperature-resistant packer sealing rubber cylinder through a vulcanizing machine die.
The high-temperature-resistant packer sealing rubber sleeve of the second embodiment is tested, the test scenario is shown in fig. 7, and the test conditions are as follows:
1) The test maximum temperature is 235 ℃;
2) The medium used by the test shaft is hydraulic oil or Kunlun KSQB300 heat-conducting oil;
3) Setting and pressing load: setting force 22T;
4) And a test sleeve: a special sleeve of phi 139.7mm (inner diameter 114.3 mm);
5) Gradually pressurizing to 30MPa, 50 MPa, 70MPa, 90 MPa and 105MPa, and stabilizing the pressure for 15min at each stage;
6) If the pressure is successfully stabilized by the pressure difference of 105MPa, carrying out a test of maintaining the pressure for 7 days;
7) If the pressure maintaining is successful in 7 days, continuing to carry out the V3 test;
8) And after the V3 test is finished, performing a temperature rise and fall test.
The pressure/temperature-time curve of the test, as shown in fig. 10, shows the following results: after the test is carried out for 7168h, when the V3 test is carried out, the pressure is lost instantly, and the rubber cylinder is broken after being taken out as shown in figure 11.
The test conclusion shows that the high-temperature-resistant packer sealing rubber sleeve can meet the application requirement of high temperature resistance of 235 ℃, successfully stabilize pressure at 105MPa of pressure difference, complete pressure maintaining in preset time, meet the basic design requirement and has an effect superior to that of the first embodiment.
EXAMPLE III
The preparation was carried out according to the scheme shown in FIG. 1.
Preparing materials: preparing raw materials of each component in parts by mass. Specifically, the preparation method comprises the following steps of: 32 parts of 100H-type tetrapropylene fluoride rubber; 80 parts of 100S type tetrapropylene fluorocarbon rubber; 32 parts of N990 type carbon black; 20 parts of N774 type carbon black; 2 parts of calcium stearate; 17 parts of 70% type TAIC; 7 portions of 60 percent type ShuangErwu; containing GeO 2 14 parts of graphene.
Banburying: 100H type tetrapropylene fluoride rubber, 100S type tetrapropylene fluoride rubber, N990 type carbon black, N774 type carbon black and GeO-containing rubber 2 And (3) putting the graphene and the calcium stearate into an internal mixer for mixing, discharging rubber after the mixing is finished, and cooling the discharged rubber on an open mill.
Open mixing: preheating the open mill, adding 70% type TAIC and 60% type Shuangerwu into the open mill after preheating, carrying out open milling, and cooling after finishing.
Cutting; and cutting the material obtained after the open milling.
And (3) vulcanization molding: and putting the cut materials into a vulcanizing machine, and forming the high-temperature-resistant packer sealing rubber cylinder through a vulcanizing machine die.
The high-temperature-resistant packer sealing rubber sleeve of the third embodiment is tested, the test scenario is shown in fig. 7, and the test conditions are as follows:
1) The highest test temperature is 235 ℃;
2) The medium used by the test shaft is hydraulic oil or Kunlun KSQB300 heat conduction oil;
3) Setting and pressing load: setting force 22T;
4) And a test sleeve: a special sleeve of phi 139.7mm (inner diameter 114.3 mm);
5) Gradually pressurizing to 30MPa, 50 MPa, 70MPa, 90 MPa and 105MPa, and stabilizing the pressure for 15min at each stage;
6) If the pressure is successfully stabilized by the pressure difference of 105MPa, carrying out a test of maintaining the pressure for 7 days;
7) If the pressure maintaining is successful in 7 days, continuing to carry out the V3 test;
8) And after the V3 test is finished, performing a temperature rise and fall test.
The test is ideal and superior to the first and second examples, and the sample tested the result status, as shown in fig. 16. The specific test results are as follows:
(1) a plot of the pressure retention at 235 ℃ and 105MPa for 7 days, as shown in FIG. 12.
The temperature and the pressure are kept stable within 7 days, no abnormal phenomenon occurs in the whole process, the rubber cylinder and the tool are temperature-resistant integrally, pressure-resistant and heat-conducting oil-resistant, and the requirements of 235 ℃ temperature resistance and 105MPa pressure resistance are met.
(2) Graph of V3 test (pressure reversal test) as shown in fig. 13.
After the pressure is gradually reduced from 105MPa to 30MPa, then is gradually increased from 30MPa to 105MPa, and is gradually reduced to 30MPa again, and finally, the rubber cylinder is tested in a pressure lifting test of increasing to 105MPa, the sealing performance of the rubber cylinder is good, the tool performance is stable, and the V3 test requirement is met.
(3) The test curve chart of the cooling performance test is shown in figure 14.
The temperature of a test well bore is slowly reduced to 60 ℃ from 235 ℃, pressure is replenished to 105MPa after the pressure is reduced to 70MPa in the temperature reduction process, and the pressure is replenished for 4 times in the temperature reduction process. When the temperature is reduced to 60 ℃, the pressure is kept to be 105MPa stable, so that the sealing performance of the rubber cylinder is good, and the performance of the rubber cylinder meets the requirements of repeated work of temperature reduction and pressure rise.
(4) Temperature rise performance test plots are shown in fig. 15.
The temperature of the well bore is increased from 60 ℃ to 235 ℃, and when the pressure exceeds 105MPa in the temperature increasing process, the pressure is artificially released to 70MPa. The process totally releases pressure for 3 times, when the temperature is increased to 235 ℃, the pressure is stably kept at 105MPa, so that the sealing performance of the rubber cylinder is good, and the performance of the rubber cylinder meets the requirements of repeated work of temperature rise and pressure reduction.
As a more specific implementation form, in the first to third embodiments, the banburying step specifically includes:
premixing N990 type carbon black and N774 type carbon black to obtain mixed carbon black, premixing 100H type tetrapropylene fluoride rubber and 100S type tetrapropylene fluoride rubber to obtain mixed rubber;
feeding for the first time: putting half of the mixed rubber and half of the mixed carbon black into an internal mixer, wherein the initial temperature of an internal mixing chamber of the internal mixer is 40-60 ℃, the rotating speed of a rotor is 35-50 r/min, and plastifying for 1-2 min after putting;
feeding for the second time: half of the mixture contains GeO 2 Putting the graphene and the rest mixed rubber into an internal mixer, and mixing for 1-1.5 min;
feeding for the third time: mixing the rest of the mixed carbon black and the rest of the GeO-containing carbon black 2 Putting the graphene into an internal mixer, mixing for 5-8 min, controlling the temperature below 120 ℃ in the mixing process, turning the rubber for 2-3 times, and starting to discharge the rubber;
and transferring the rubber materials discharged from the internal mixer to an open mill within 1min for performing thin-pass cooling, and discharging and storing for 24h when the rubber materials are cooled to below 60 ℃.
As a preferred embodiment of the present application, in the above-mentioned banburying step, a premix mixing device as shown in fig. 2 to fig. 6 is used to premix and perform feeding to the banbury mixer.
The premix device comprises: rubber compounding mechanism 1, carbon black compounding mechanism 2, reinforced mechanism 3, unloading mechanism 5, the slope of unloading mechanism 5 sets up, and rubber compounding mechanism 1, carbon black compounding mechanism 2, 3 bottoms of reinforced mechanism are connected to collecting hopper 4 through a blanking pipe 6 respectively, and the 5 upper ends of unloading mechanism are connected to collecting hopper 4 bottom, and each blanking pipe 6 all is furnished with the ooff valve, and the banbury mixer is connected to 5 lower extremes of unloading mechanism.
The rubber mixing mechanism 1 comprises a mixing cylinder 10, the upper part of which can be opened, and the top of which is provided with a rubber feed port 11. The outer wall of the mixing cylinder 10 is provided with a transverse motor 12 through a support, an output shaft of the transverse motor 12 extends into the mixing cylinder 10 and is connected with a gear 13, the inner wall of the mixing cylinder 10 is provided with a rotating ring 14 in a rotating fit mode, the top surface of the rotating ring 14 is provided with an annular tooth part 141, and the gear 13 is meshed with the annular tooth part 141. The inner wall array of the rotating ring 14 is provided with a plurality of telescopic rods 15, the telescopic rods 15 are arranged along the radial direction of the mixing barrel 10 and face the axial lead of the mixing barrel 10, and the ends of the telescopic rods 15 are connected with vertical stirring rods 16. The telescopic rod 15 comprises a fixing portion 151 and a telescopic portion 152, the telescopic portion 152 is slidably inserted into a concave channel at the front end of the fixing portion 151, and a locking bolt 153 for locking the telescopic portion 152 is arranged on the outer wall of the fixing portion 151.
The blanking mechanism 5 comprises an inclined feeding plate 51, a pair of lifting cylinders 55 arranged on two outer side walls of the inclined feeding plate 51, a cross rod 53 connected with the movable end of the lifting cylinder 55, a material pushing plate 52 connected to the bottom of the cross rod 53, a limiting plate 54 arranged on the front end face of the material pushing plate 52, the lifting cylinder 55 is arranged in the length direction of the inclined feeding plate 51 in a vertical direction perpendicular to the vertical direction, sliding grooves 56 along the length direction are formed in the two outer side walls of the inclined feeding plate 51, a screw rod 57 is arranged in the sliding grooves 56, one end of the screw rod 57 is connected with a motor 58, the motor 58 is arranged at the upper end of the outer side wall of the inclined feeding plate 51, the other end of the rod 57 is rotatably matched with the end wall of the sliding grooves 56 towards the lower end of the inclined feeding plate 51, the lower portion of the lifting cylinder 55 is matched with the sliding grooves 56, and threads penetrate through the screw rod 57.
Preferably, the inner wall of the mixing cylinder 10 is provided with an annular shielding body 17 above the annular tooth part 141, and the top surface of the annular shielding body 17 is an inclined surface and inclined towards the center, so that the materials can be discharged towards the center conveniently. Meanwhile, at the position of the gear 13, there is a guard 18 for guarding the gear 13.
When a premixing device is adopted for carrying out the banburying step, the premixing is completed in the following way:
putting N990 type carbon black and N774 type carbon black into the carbon black mixing mechanism 2 from a carbon black feeding port 21 at the top of a mixing cavity 20 of the carbon black mixing mechanism 2, starting a vertical stirring motor 22 at the top of the carbon black mixing mechanism 2 to drive a stirring paddle in the mixing cavity 20 to stir so as to complete mixing, and obtaining mixed carbon black;
putting 100H-type tetrapropylene fluorocarbon rubber and 100S-type tetrapropylene fluorocarbon rubber into a rubber mixing mechanism 1 from a rubber feed inlet 11 at the top of the rubber mixing mechanism 1, starting the rubber mixing mechanism 1 to mix materials to obtain mixed rubber;
will contain GeO 2 The graphene is put into the feeding mechanism 3 to wait for blanking.
As a further embodiment, the first feeding comprises: the switch valves corresponding to the rubber mixing mechanism 1 and the carbon black mixing mechanism 2 are opened, so that the switch valves are closed when the mixed carbon black and the mixed rubber are discharged for a half, the discharged mixed carbon black and the discharged mixed rubber enter the material collecting hopper 4 through the discharging pipe 6 respectively to be collected, enter the discharging mechanism 5 through the material collecting hopper 4, and are conveyed to the internal mixer through the discharging mechanism 5.
As a further embodiment, in the second feeding, the corresponding switch valves of the rubber mixing mechanism 1 and the feeding mechanism 3 are opened, and when all the mixed rubber in the rubber mixing mechanism 1 is fed, the corresponding switch valve and the GeO-containing material are closed 2 Closing the corresponding switch valve when half of graphene is discharged, wherein the discharged material contains GeO 2 The graphene and the mixed rubber enter the material collecting hopper 4 through the discharging pipe 6 respectively for collection, enter the discharging mechanism 5 through the material collecting hopper 4, and are conveyed to the internal mixer through the discharging mechanism 5.
In a further embodiment, in the third charging, the corresponding on-off valves of the carbon black mixing mechanism 2 and the charging mechanism 3 are opened, and when all the remaining mixed carbon black in the carbon black mixing mechanism 2 is discharged, the corresponding on-off valves are closed, so that the remaining GeO-containing substance in the charging mechanism 3 is discharged 2 Closing the corresponding switch valve when all the graphene is discharged, wherein the discharged material contains GeO 2 The graphene and the mixed carbon black enter the material collecting hopper 4 through the material discharging pipe 6 respectively to be collected, enter the material discharging mechanism 5 through the material collecting hopper 4, and are conveyed to the internal mixer through the material discharging mechanism 5.
The feeding is completed in the mode, the feeding amount can be effectively controlled, and the premix can be conveyed to a certain degree through the collection of the collecting hopper 4 and the conveying in the feeding mechanism 5 before entering the internal mixer.
As a further implementation form, during each feeding, when the materials are conveyed to the internal mixer through the feeding mechanism 5, the materials naturally slide down to the internal mixer by using the inclined feeding plate 51 of the feeding mechanism 5, and after each sliding of the materials is completed, the lifting cylinders 55 arranged on the two outer side walls of the inclined feeding plate 51 drive the cross rods 53 to withdraw the material pushing plates 52 connected with the cross rods 53, so that the material pushing plates 52 descend to the inclined feeding plate 51, at this time, the limiting plates 54 connected to the front surfaces of the material pushing plates 52 cover the top openings of the inclined feeding plate 51, the motors 58 arranged on the two outer side walls of the inclined feeding plate 51 drive the screw rods 57 located in the sliding grooves 56 to rotate, so that the materials slide in the sliding grooves 56 and penetrate through the lower parts of the lifting cylinders 55 of the screw rods 57, and move along the sliding grooves 56 from the upper ends to the lower ends of the inclined feeding plate 51, so that the material pushing plates 52 push the materials retained on the inclined feeding plate 51 to the internal mixer, the limiting plates 54 can limit the materials in the material pushing plates 52 from the top openings of the inclined feeding plate 51 to overflow, thereby realizing more thorough feeding, reducing the problem that the materials retained on the internal mixer are not uniformly mixed in the internal mixer after being too much, and causing disorder of the internal mixer.
In a further embodiment, the rubber compounding mechanism 1 is configured to mix the 100H-type tetrapropylene fluorocarbon rubber and the 100S-type tetrapropylene fluorocarbon rubber by: the gear 13 connected with the transverse motor 12 is driven to rotate by utilizing the rotation of the transverse motor 12 arranged on the side wall of the mixing cylinder 10 through a bracket, the gear 13 is positioned in the mixing cylinder 10 and is meshed with the annular tooth part 141 which is rotationally matched with the top surface of the rotating ring 14 on the inner wall of the mixing cylinder 10, and the gear 13 drives the rotating ring 14 to rotate through the annular tooth part 141 when rotating, so that a plurality of telescopic rods 15 arranged on the inner wall of the rotating ring 14 along the radial direction and a vertical stirring rod 16 connected with the end of each telescopic rod 15 are driven to rotate, and the mixing and stirring of 100H-type tetrapropylfluoride rubber and 100S-type tetrapropylfluoride rubber are realized.
Preferably, the telescopic rod 15 comprises a fixing portion 151 and a telescopic portion 152, the telescopic portion 152 is slidably inserted into a concave channel in the front end of the fixing portion 151, the upper portion of the mixing cylinder 10 is opened before the rubber mixing mechanism 1 is mixed, the telescopic portion 152 is unlocked through an adjusting locking bolt 153 penetrating through the fixing portion 151, the telescopic portion 152 extends out for more distance along the radial direction towards the circle center and then is locked, and therefore the telescopic rod 15 has different lengths. Specifically, can be before rubber compounding mechanism 1 mixes, be two lengths with the 15 length adjustment of all telescopic links, the telescopic link 15 that length is short and the 15 interval arrangements of telescopic link that length is long to when the stirring, can realize that vertical puddler 16 is in different radial position, improve stirring compounding effect. In practical use, the lengths of the telescopic rods 15 may be different or partially the same.
Preferably, the vertical stirring rod 16 is provided with a cutter head towards the end of the axial lead of the mixing barrel 10, so that rubber can be cut to a certain extent in the stirring process, the volume is reduced, or the rubber part is cut and is easy to separate, and the later-stage banburying can be facilitated to achieve the uniform effect quickly.
The foregoing is merely a preferred embodiment of this invention and is not intended to be exhaustive or to limit the invention to the precise form disclosed. It should be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention as defined by the claims below.
Claims (10)
1. The high-temperature-resistant packer sealing rubber sleeve is characterized by comprising the following components in parts by mass: 18-32 parts of 100H-type tetrapropylene fluororubber; 60-80 parts of 100S type tetrapropylene fluororubber; 18-32 parts of N990 type carbon black; 10-20 parts of N774 type carbon black; 0.5-2 parts of calcium stearate; 10-17 parts of 70% type TAIC; 2-7 parts of 60% type Shuangerwu; containing GeO 2 7-14 parts of graphene.
2. The high-temperature-resistant packer sealing rubber sleeve as claimed in claim 1, wherein the 100H-type tetrapropylene fluoride rubber is 30 parts; 70 parts of 100S type tetrapropylene fluororubber; 30 parts of N990 type carbon black; 15 parts of N774 type carbon black; 1 part of calcium stearate; 13 parts of 70% type TAIC; 5 portions of 60 percent type Shuangerwu; containing GeO 2 The amount of the graphene is 10 parts.
3. The preparation method of the high-temperature-resistant packer sealing rubber sleeve according to claim 1 or 2, characterized by comprising the following steps of:
preparing materials: preparing raw materials of each component in parts by mass;
banburying: putting 100H type tetrapropylene fluoride rubber, 100S type tetrapropylene fluoride rubber, N990 type carbon black, N774 type carbon black, graphene and calcium stearate into an internal mixer for mixing, discharging rubber after the mixing is finished, and cooling the discharged rubber on an open mill;
open mixing: preheating an open mill, adding 70% type TAIC and 60% type duo-di-V into the open mill after preheating is finished, carrying out open milling, and cooling after finishing;
cutting; cutting the material obtained after the open milling;
and (3) vulcanization molding: and putting the cut materials into a vulcanizing machine, and forming the high-temperature-resistant packer sealing rubber cylinder through a vulcanizing machine die.
4. The preparation method of the high-temperature-resistant packer sealing rubber sleeve according to claim 3, wherein the banburying step specifically comprises the following steps:
premixing N990 type carbon black and N774 type carbon black to obtain mixed carbon black, and premixing 100H type tetrapropylene fluorocarbon rubber and 100S type tetrapropylene fluorocarbon rubber to obtain mixed rubber;
feeding for the first time: putting half of the mixed rubber and half of the mixed carbon black into an internal mixer, wherein the initial temperature of an internal mixing chamber of the internal mixer is 40-60 ℃, the rotating speed of a rotor is 35-50 r/min, and plastifying for 1-2 min after putting;
feeding for the second time: putting half of the graphene and the rest of the mixed rubber into an internal mixer, and mixing for 1-1.5 min;
feeding for the third time: putting the rest mixed carbon black and the rest graphene into an internal mixer, mixing for 5-8 min, controlling the temperature below 120 ℃ in the mixing process, turning the rubber for 2-3 times, and starting rubber discharge;
and transferring the rubber materials discharged from the internal mixer to an open mill within 1min for performing thin-pass cooling, and discharging and storing for 24h when the rubber materials are cooled to below 60 ℃.
5. The preparation method of the high-temperature-resistant packer sealing rubber barrel according to claim 4, wherein in the banburying step, a premix mixing device is adopted for premix mixing and feeding to a banbury mixer, and the premix mixing device comprises: the device comprises a rubber mixing mechanism (1), a carbon black mixing mechanism (2), a feeding mechanism (3) and a discharging mechanism (5), wherein the discharging mechanism (5) is obliquely arranged, the bottoms of the rubber mixing mechanism (1), the carbon black mixing mechanism (2) and the feeding mechanism (3) are respectively connected to a collecting hopper (4) through a discharging pipe (6), the bottom of the collecting hopper (4) is connected with the upper end of the discharging mechanism (5), each discharging pipe (6) is provided with a switch valve, and the lower end of the discharging mechanism (5) is connected with an internal mixer;
when the premixing step is carried out:
putting N990 type carbon black and N774 type carbon black into a carbon black mixing mechanism (2) from a carbon black feeding port (21) at the top of a mixing cavity (20) of the carbon black mixing mechanism (2), starting a vertical stirring motor (22) at the top of the carbon black mixing mechanism (2) to drive a stirring paddle in the mixing cavity (20) to stir so as to complete mixing, and obtaining mixed carbon black;
putting 100H-type tetrapropylene fluororubber and 100S-type tetrapropylene fluororubber into the rubber mixing mechanism (1) from a rubber feeding port (11) at the top of the rubber mixing mechanism (1), starting the rubber mixing mechanism (1) to mix materials, and obtaining mixed rubber;
and putting the graphene into a feeding mechanism (3) to wait for blanking.
6. The preparation method of the high-temperature-resistant packer sealing rubber sleeve according to claim 5, characterized by comprising the following steps of:
when feeding for the first time: opening switch valves corresponding to the rubber mixing mechanism (1) and the carbon black mixing mechanism (2), closing the switch valves when half of mixed carbon black and mixed rubber is discharged, enabling the discharged mixed carbon black and mixed rubber to enter a collecting hopper (4) through a discharging pipe (6) respectively for collection, enter a discharging mechanism (5) through the collecting hopper (4), and be conveyed to an internal mixer through the discharging mechanism (5);
when feeding for the second time, opening the corresponding switch valves of the rubber mixing mechanism (1) and the feeding mechanism (3), closing the corresponding switch valves when all the residual mixed rubber in the rubber mixing mechanism (1) is discharged, and closing the corresponding switch valves when half of the graphene is discharged, wherein the discharged graphene and the mixed rubber respectively enter the collecting hopper (4) through the discharging pipe (6) to be collected, enter the discharging mechanism (5) through the collecting hopper (4), and are conveyed to the internal mixer through the discharging mechanism (5);
when the material is thrown for the third time, open carbon black compounding mechanism (2), the ooff valve that reinforced mechanism (3) corresponds, close corresponding ooff valve when making the whole unloading of carbon black compounding mechanism (2) surplus mixed carbon black, close corresponding ooff valve when making the whole unloading of surplus graphite alkene in reinforced mechanism (3), the graphite alkene of unloading and mixed carbon black enter into collecting hopper (4) through unloading pipe (6) respectively and collect, and lead to collecting hopper (4) and enter into unloading mechanism (5), carry to the banbury mixer by unloading mechanism (5).
7. The method for preparing the high-temperature-resistant packer sealing rubber barrel according to claim 6, wherein during each feeding, when the materials are conveyed to an internal mixer through a blanking mechanism (5), the materials are naturally slid down to the internal mixer by using an inclined feeding plate (51) of the blanking mechanism (5), after each sliding of the materials is completed, a lifting cylinder (55) arranged on two outer side walls of the inclined feeding plate (51) is used for driving a cross rod (53) to withdraw a material pushing plate (52) connected with the cross rod (53), so that the material pushing plate (52) is lowered into the inclined feeding plate (51), at the moment, a limiting plate (54) connected with the front surface of the material pushing plate (52) covers the top opening of the inclined feeding plate (51), a motor (58) arranged on two outer side walls of the inclined feeding plate (51) is used for driving a screw rod (57) positioned in a sliding chute (56) to rotate, so that the screw rod (55) slidably matched with the sliding chute (56) and penetrating through the screw rod (57) moves from the upper end of the inclined feeding plate (51) to the lower end along the sliding chute (56), and the material pushing plate (52) can be completely prevented from overflowing from the inclined feeding plate (51) to the material pushing plate (52), and the material pushing plate (51) in the internal mixer is prevented, and the material pushing plate (52) can be completely discharged from the inclined feeding plate (51).
8. The preparation method of the high-temperature-resistant packer sealing rubber sleeve according to claim 5, characterized in that the rubber mixing mechanism (1) is used for mixing 100H-type tetrapropylene fluoride rubber and 100S-type tetrapropylene fluoride rubber by the following steps:
the gear (13) connected with the transverse motor (12) is driven to rotate by utilizing the rotation of the transverse motor (12) arranged on the side wall of the mixing cylinder (10) through the support, the gear (13) is positioned in the mixing cylinder (10) and is meshed with the annular tooth part (141) on the top surface of the rotating ring (14) in a rotating fit mode on the inner wall of the mixing cylinder (10), the rotating ring (14) is driven to rotate through the annular tooth part (141) when the gear (13) rotates, and therefore the vertical stirring rods (16) which are radially arranged on the inner wall of the rotating ring (14) and connected with the end heads of the telescopic rods (15) are driven to rotate, and the mixing and stirring of 100H-type tetrapropylene fluororubber and 100S-type tetrapropylene fluororubber are realized.
9. The preparation method of the high-temperature-resistant packer sealing rubber barrel according to claim 8, wherein the telescopic rod (15) comprises a fixing part (151) and a telescopic part (152), the telescopic part (152) is slidably inserted into a concave channel at the front end of the fixing part (151), the upper part of the mixing barrel (10) is opened before the mixing of the rubber mixing mechanism (1), the telescopic part (152) is unlocked through an adjusting locking bolt (153) penetrating through the fixing part (151), and the telescopic part (152) extends out more distance along the radial direction towards the circle center and then is locked, so that the telescopic rod (15) has different lengths.
10. The preparation method of the high-temperature-resistant packer sealing rubber sleeve according to claim 9, characterized in that the rubber mixing mechanism (1) adjusts the lengths of all the telescopic rods (15) to two lengths before mixing, and the telescopic rods (15) with short lengths and the telescopic rods (15) with long lengths are arranged at intervals.
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