CN108443499B - Concrete piston sealing body and manufacturing method thereof - Google Patents
Concrete piston sealing body and manufacturing method thereof Download PDFInfo
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- CN108443499B CN108443499B CN201810349896.2A CN201810349896A CN108443499B CN 108443499 B CN108443499 B CN 108443499B CN 201810349896 A CN201810349896 A CN 201810349896A CN 108443499 B CN108443499 B CN 108443499B
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- concrete piston
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- 238000007789 sealing Methods 0.000 title claims abstract description 68
- 238000004519 manufacturing process Methods 0.000 title description 5
- 239000010410 layer Substances 0.000 claims abstract description 114
- 229920001971 elastomer Polymers 0.000 claims abstract description 48
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 47
- 239000010959 steel Substances 0.000 claims abstract description 47
- 239000004033 plastic Substances 0.000 claims abstract description 42
- 229920003023 plastic Polymers 0.000 claims abstract description 42
- 238000003860 storage Methods 0.000 claims abstract description 20
- 230000002093 peripheral effect Effects 0.000 claims abstract description 16
- 239000011159 matrix material Substances 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 239000011229 interlayer Substances 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims abstract description 4
- 229920000459 Nitrile rubber Polymers 0.000 claims description 24
- 239000004744 fabric Substances 0.000 claims description 23
- 239000000835 fiber Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 9
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 7
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 6
- 239000006229 carbon black Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000007822 coupling agent Substances 0.000 claims description 6
- 239000008397 galvanized steel Substances 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 230000003712 anti-aging effect Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000003475 lamination Methods 0.000 claims description 5
- 238000004073 vulcanization Methods 0.000 claims description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000010146 3D printing Methods 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 150000002825 nitriles Chemical group 0.000 claims 2
- 238000005336 cracking Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 description 7
- 239000002002 slurry Substances 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/143—Sealing provided on the piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/28—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction of non-metals
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Material Composition (AREA)
Abstract
The upper part of a rubber body of the concrete piston sealing body is provided with a protruding concrete piston lip, the inner side of the concrete piston lip is provided with a slope, the lower part of the slope is connected with a concave structure, and the cross section of the joint of the slope and the concave structure is arc-shaped; the lower part of the rubber body is a sealing body substrate, an oil storage tank is arranged at the transition part between the outer side surface of the peripheral sandwich layer and the sealing body substrate, and the section shape of the oil storage tank is an inclined V shape; the bottom and the side parts of the sealing body matrix are respectively provided with a steel wire mesh layer or a plastic mesh layer; the outermost layer at the bottom of the sealing body matrix is provided with a bottom interlayer; the outermost layer of the outer side face of the sealing body matrix and the outer side face of the lip is provided with a peripheral sandwich layer, and one end of the bottom sandwich layer is wrapped by the lower end of the outer sandwich layer. The concrete piston sealing body solves the problems of poor high temperature resistance, poor wear resistance, easy cracking of an oil storage tank, easy deformation, short service life and the like in the prior art.
Description
Technical Field
The invention belongs to the technical field of sealing devices, and particularly relates to a concrete piston sealing body and a manufacturing method thereof.
Background
At present, the rubber concrete piston is an important part of cement slurry conveying pumps of construction engineering and drilling machinery, and reciprocates in cement slurry and other mediums to pump the cement slurry to high places and far places, and simultaneously has a sealing effect to prevent the cement slurry from leaking. The existing assembled slurry pump piston is mostly made of pure polyurethane materials, and polyurethane products have excellent elasticity and wear resistance, but because of poor high temperature resistance, easiness in hydrolysis and large friction coefficient, the piston becomes soft, sticky and sealed and loses efficacy when the pump truck is continuously conveyed for a long distance, the service life is short, and the working efficiency of equipment is seriously affected. Some of the pistons are made of rubber, but the rubber concrete pistons are poor in wear resistance, poor in heat resistance and poor in tearing performance as compared with polyurethane due to the fact that the rubber concrete pistons are made of rubber, the service life is short, deformation caused by stress relaxation can occur in long-term reciprocating motion, and meanwhile, a large amount of heat generated in the reciprocating motion can not be discharged in time, so that the performance of the pistons is affected, and the working efficiency of equipment is seriously affected.
In the movement process of the piston, the open lip of the sealing ring is extruded outwards, the inclined edge at the inner side of the lip of the sealing ring and the concave structure are subjected to the action of a mutually separated force, the general section of the lip is designed to be in a Y shape or a V shape in most, and the joint in the lip is in cracking condition under the action of a long-term outward force; in order to solve the problem that the concrete piston sealing body is not wear-resistant, a fabric clamping rubber sealing ring is developed at present, the wear resistance of the sealing body is improved in a certain range, but due to the surface specificity of the fabric clamping rubber sealing ring, an oil film on a sliding surface is easily scraped by a lip of the sealing ring in the reciprocating motion process, the lubricating property is poor, oil leakage can be caused, and therefore, a concave oil storage tank is designed for some concrete piston sealing bodies, the section of the oil storage tank is square or arc-shaped, the oil storage tank can be extruded and attached together in the motion, and the joint of the square or arc-shaped oil storage tank also has the risk of cracking, so that the service life of a piston is influenced. For this reason, there is a need for a concrete piston seal that can solve the above problems, thereby meeting the needs of practical situations.
Disclosure of Invention
In order to solve the problems, the invention discloses a concrete piston sealing body and a manufacturing method thereof, which are used for solving the problems of poor high temperature resistance and wear resistance, easy cracking and deformation of the joint of an oil storage tank and a bevel edge and a concave structure, short service life and the like in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the concrete piston sealing body comprises a rubber body, a peripheral sandwich layer, a bottom sandwich layer and a steel wire mesh layer or plastic mesh layer, wherein a protruding concrete piston lip is arranged at the upper part of the rubber body, the inner side of the concrete piston lip is provided with a slope, the lower part of the slope is connected with a concave structure, and the section of the joint of the slope and the concave structure is arc-shaped; the lower part of the rubber body is a sealing body substrate, an oil storage tank is arranged at the transition part between the outer side surface of the peripheral sandwich layer and the sealing body substrate, and the section shape of the oil storage tank is an inclined V shape; the bottom and the side parts of the sealing body matrix are respectively provided with a steel wire mesh layer or a plastic mesh layer; the outermost layer at the bottom of the sealing body matrix is provided with a bottom interlayer; the outermost layer of the outer side face of the sealing body matrix and the outer side face of the lip is provided with a peripheral sandwich layer, and one end of the bottom sandwich layer is wrapped by the lower end of the outer sandwich layer.
Further, the steel wire mesh layer is a nitrile rubber steel wire mesh layer.
Further, the steel wire mesh in the nitrile rubber clip steel wire mesh layer is a galvanized steel wire mesh or a copper-plated steel wire mesh, and the surface of the galvanized steel wire mesh or the copper-plated steel wire mesh is treated by a surfactant or a coupling agent.
Further, the plastic net layer is a nitrile rubber plastic net layer, and the plastic net in the nitrile rubber plastic net layer is manufactured through a 3D printing technology.
Further, the plastic net is made of one of ABS, PC, PP or PA.
Further, the peripheral sandwich layer and the bottom sandwich layer are formed by laminating fiber fabrics coated with rubber, and the rubber is nitrile rubber.
Further, the fiber fabric is at least one of plain cloth of cotton fiber, nylon fiber and polyester fiber.
The preparation method of the concrete piston sealing body comprises the following steps:
(1) Preforming a sandwich layer: cutting the fiber fabrics, curling the fiber fabrics into a required shape, and respectively coating each layer of fiber fabrics with rubber for later use;
(2) Preforming of a sandwich steel wire mesh layer or a sandwich plastic mesh layer: after surface treatment is carried out on the steel wire mesh or the plastic mesh by using a surfactant or a coupling agent, coating rubber on the steel wire mesh layer or the plastic mesh layer for later use;
(3) Preforming of rubber body: molding the raw rubber by an open mill;
(4) And (3) compound vulcanization lamination: and (3) putting the plurality of cloth clamping layers, the steel wire mesh clamping layers or the plastic mesh clamping layers and the rubber body into a mold in a vulcanizing machine for vulcanizing.
Further, the rubber body is prepared from the following components in parts by weight: 80 to 100 parts of NBR, 2 to 3 parts of reactive anti-aging agent, 40 to 50 parts of carbon black,ZnO 5-8, spherical Al 2 O 3 5 to 10 percent of plasticizer 2 to 5 percent, 0.3 to 0.5 percent of sulfur, 1 to 2.5 percent of accelerator DM, 1 to 2 percent of accelerator DTDM and 0.5 to 1 percent of accelerator TMTD.
Further, the acrylonitrile content in the NBR is more than 40% by weight of the total mass.
Compared with the prior art, the invention has the beneficial effects that:
(1) The bottom and the side parts of the basal body part of the lower sealing body of the rubber body are respectively provided with the steel wire mesh layer or the plastic mesh layer, and the steel wire mesh or the plastic mesh not only increases the external strength of the basal body part of the sealing body, so that the basal body of the sealing body is not easy to deform in the use process, but also does not increase the weight of the sealing body of the piston basically because the steel wire mesh or the plastic mesh is of a net-shaped structure.
(2) The rubber body of the concrete piston sealing body is added with zinc oxide and spherical aluminum oxide with the compound heat conduction function, so that a large amount of heat generated by friction and the like in reciprocating motion can be timely conducted out, and meanwhile, the outer steel wire mesh also has good heat conduction performance, so that adverse effects on the piston performance due to untimely heat conduction are greatly reduced.
(3) The cross section of the oil storage tank of the concrete piston sealing body is set to be in an inclined V shape, and the cross section of the joint of the slope on the inner side of the lip of the concrete piston and the concave structure is set to be in an arc shape, so that the conditions of cracking of the joint of the slope and the concave structure and cracking of the oil storage tank caused by outward extrusion of the lip of the sealing ring and extrusion lamination of the oil storage tank in the movement process of the piston are reduced, and the service life of the concrete piston sealing ring is prolonged.
(4) The bottom sandwich layer is arranged on the outermost layer at the bottom of the concrete piston sealing body, the peripheral sandwich layer is arranged on the outermost layer on the outer side face of the sealing body base body and the outer side face of the lip, and one end of the bottom sandwich layer is wrapped by the lower end of the outer sandwich layer.
Drawings
FIG. 1 is a schematic cross-sectional view of a concrete piston seal of the present invention;
FIG. 2 is an enlarged view at A;
fig. 3 is an enlarged view at B.
Reference numerals illustrate: 1 is a rubber body, 2 is a peripheral sandwich layer, 3 is a bottom sandwich layer, 4 is a sandwich steel wire mesh layer or a sandwich plastic mesh layer, 5 is a lip, 6 is a slope, 7 is a concave structure, 8 is a sealing body matrix, and 9 is an oil storage tank.
Detailed Description
The invention will be further elucidated with reference to the drawings and the specific embodiments, to which the invention is not limited.
Example 1
The concrete piston sealing body comprises a rubber body 1, a peripheral sandwich layer 2, a bottom sandwich layer 3, a steel wire mesh layer or a plastic mesh layer 4, a protruding concrete piston lip 5 is arranged at the upper part of the rubber body, a slope 6 is arranged at the inner side of the concrete piston lip, a concave structure 7 is connected at the lower part of the slope, a sealing body substrate 8 is arranged at the lower part of the rubber body, and an oil storage tank 9 is arranged at the transition part B between the outer side surface of the outer lip and the sealing body substrate; the bottom and the side parts of the sealing body matrix 8 are both provided with the steel wire mesh layer or the plastic mesh layer 4, and the steel wire mesh or the plastic mesh not only increases the external strength of the matrix part of the sealing body, so that the sealing body matrix is not easy to deform in the use process, but also basically does not increase the weight of the piston sealing body because the steel wire mesh or the plastic mesh is of a net structure; the bottom interlayer 3 is arranged on the outermost layer of the bottom of the sealing body matrix 8; the outermost layers of the outer side surface of the sealing body matrix 8 and the outer side surface of the lip are provided with peripheral sandwich layers 2, the lower end of each outer sandwich layer 2 wraps one end of each bottom sandwich layer 3, each peripheral sandwich layer and each bottom sandwich layer are formed by laminating a plurality of layers of rubber-coated fiber fabrics, and the rubber is nitrile rubber; the fiber fabric is at least one of cotton fiber, nylon fiber and polyester fiber plain weave. The number of the fiber fabrics in the peripheral sandwich layer is 5-8; the number of layers of the fiber fabrics in the bottom sandwich layer is 3-5. Because of the higher strength of the sandwich layer, the wear resistance of the sealing body is improved, and the service life of the concrete piston sealing ring is prolonged.
The manufacturing method of the concrete piston sealing body comprises the following steps:
(1) Preforming a sandwich layer: cutting the fiber fabrics, curling the fiber fabrics into a required shape, and respectively coating each layer of fiber fabrics with rubber for later use;
(2) Preforming of a sandwich steel wire mesh layer or a sandwich plastic mesh layer: after surface treatment is carried out on the steel wire mesh or the plastic mesh by using a surfactant or a coupling agent, coating rubber on the steel wire mesh layer or the plastic mesh layer for later use;
(3) Preforming of rubber body: molding the raw rubber by an open mill;
(4) And (3) compound vulcanization lamination: and (3) putting the plurality of cloth clamping layers, the steel wire mesh clamping layers or the plastic mesh clamping layers and the rubber body into a mold in a vulcanizing machine for vulcanizing.
Example 2
A concrete piston sealing body is similar to the embodiment 1, except that the steel wire mesh layer is a nitrile rubber steel wire mesh layer, the steel wire mesh in the nitrile rubber steel wire mesh layer is a galvanized steel wire mesh or a copper plated steel wire mesh, the plating layer is uniform, strong in adhesive force, durable in corrosion resistance and excellent in toughness and elasticity, and in order to further increase the compatibility between the steel wire mesh and plastics, the surface of the galvanized steel wire mesh or the copper plated steel wire mesh is further treated by a surfactant or a coupling agent; the plastic net layer is a nitrile rubber plastic net layer, the plastic net in the nitrile rubber plastic net layer is manufactured through a 3D printing technology, and the plastic net is made of one of ABS, PC, PP or PA. The number of the steel wire meshes or the plastic meshes in the steel wire mesh layer or the plastic mesh layer is at least two.
Example 3
A concrete piston sealing body similar to embodiment 2, except that the cross-sectional shape of the junction a of the slope 6 and the recessed structure 7 is arc-shaped; the section shape of the oil storage tank is an inclined V shape; therefore, the conditions of cracking at the joint of the slope and the concave structure and the cracking of the oil storage tank caused by outwards extruding the lip of the sealing ring and the extrusion and lamination of the oil storage tank in the movement process of the piston are reduced, and the service life of the concrete piston sealing ring is prolonged.
Example 4
A concrete piston sealing body is similar to example 3, except that the rubber body is prepared from the following components in parts by weight: NBR 80, a reactive anti-aging agent 2, carbon black 40, znO 5, spherical Al2O3 5, a plasticizer 2, sulfur 0.3, an accelerator DM 1, an accelerator DTDM 1 and an accelerator TMTD 0.5, wherein the content of acrylonitrile in the NBR is more than 40 percent by weight.
The raw rubber NBR is made of a brand with high acrylonitrile content, the acrylonitrile content accounts for more than 40% of the total mass, and the oil resistance is good; the anti-aging agent is a reactive anti-aging agent with good thermo-oxidative aging resistance and durable protective effect; the reinforcing agent is carbon black with good rebound resilience and small heat generation; the vulcanization system is an effective vulcanization system with excellent heat resistance and dynamic performance. In order to strengthen the heat conduction effect of the material, zinc oxide and spherical alumina with synergistic effect are also added in the formula, so that heat generated by intense friction can be rapidly transferred, the temperature of the product is reduced, the heat aging process is slowed down, and the service life of the product is prolonged.
Example 5
A concrete piston sealing body is similar to example 3, except that the rubber body is prepared from the following components in parts by weight: NBR 90, reactive antioxidant 3, carbon black 45, znO 6, spherical Al 2 O 3 8, a plasticizer 3, sulfur 0.4, an accelerator DM 2, an accelerator DTDM 2 and an accelerator TMTD 0.5, wherein the content of acrylonitrile in NBR is more than 40 percent by weight.
Example 6
A concrete piston sealing body is similar to example 3, except that the rubber body is prepared from the following components in parts by weight: NBR 100, reactive antioxidant 3, carbon black 50, znO 8, spherical Al 2 O 3 10, a plasticizer 5, sulfur 0.5, an accelerator DM 2.5, an accelerator DTDM 2 and an accelerator TMTD 1, wherein the content of acrylonitrile in NBR is more than 40 percent by weight.
The product prepared by the embodiment is practically applied, and no slurry is overflowed after being pumped for 400 hours in a site; after the product is disassembled, the product is good in appearance, the lips are worn to form a crescent shape, and enough interference is achieved. After 500 hours of use, the pump truck has no slurry passing, the product is not damaged, and the accumulated pumping capacity exceeds 5 square meters. Far longer than 200h and 2 square of the original fittings of the main stream manufacturer in the market.
The above description is merely of a preferred embodiment of the present invention, the present invention is not limited to the above embodiment, and minor structural modifications may exist in the implementation process, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention and fall within the scope of the appended claims and the equivalent technology, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The concrete piston sealing body comprises a rubber body, a peripheral sandwich layer and a bottom sandwich layer, and is characterized by further comprising a steel wire mesh layer or a plastic mesh layer, wherein a protruding concrete piston lip is arranged at the upper part of the rubber body, the inner side of the concrete piston lip is provided with a slope, the lower part of the slope is connected with a concave structure, and the section of the joint of the slope and the concave structure is arc-shaped; the lower part of the rubber body is a sealing body substrate, an oil storage tank is arranged at the transition part between the outer side surface of the peripheral sandwich layer and the sealing body substrate, and the section shape of the oil storage tank is an inclined V shape; the bottom and the side parts of the sealing body matrix are respectively provided with a steel wire mesh layer or a plastic mesh layer; the outermost layer at the bottom of the sealing body matrix is provided with a bottom interlayer; the outermost layers of the outer side surface of the sealing body matrix and the outer side surface of the lip are provided with peripheral sandwich layers, and the lower ends of the outer sandwich layers wrap one end of the bottom sandwich layer;
the rubber body is prepared from the following components in parts by weight: 80-100 parts of NBR, 2-3 parts of reactive anti-aging agent, 40-50 parts of carbon black, 5-8 parts of ZnO and spherical Al 2 O 3 5 to 10, 2 to 5, 0.3 to 0.5, 1 to 2.5, 1 to 2, 0.5 to 1 of accelerator DTDM;
the concrete piston sealing body is prepared by the following method:
(1) Preforming a sandwich layer: cutting the fiber fabrics, curling the fiber fabrics into a required shape, and respectively coating each layer of fiber fabrics with rubber for later use;
(2) Preforming of a sandwich steel wire mesh layer or a sandwich plastic mesh layer: after surface treatment is carried out on the steel wire mesh or the plastic mesh by using a surfactant or a coupling agent, coating rubber on the steel wire mesh layer or the plastic mesh layer for later use;
(3) Preforming of rubber body: molding the raw rubber by an open mill;
(4) And (3) compound vulcanization lamination: and (3) putting the plurality of cloth clamping layers, the steel wire mesh clamping layers or the plastic mesh clamping layers and the rubber body into a mold in a vulcanizing machine for vulcanizing.
2. The concrete piston seal of claim 1 wherein said steel mesh-sandwiched layer is a nitrile rubber steel mesh-sandwiched layer.
3. The concrete piston sealing body according to claim 2, wherein the steel wire mesh in the nitrile rubber clip steel wire mesh layer is a galvanized steel wire mesh or a copper-plated steel wire mesh, and the surface of the galvanized steel wire mesh or the copper-plated steel wire mesh is treated by a surfactant or a coupling agent.
4. The concrete piston seal of claim 1, wherein said plastic-sandwiched mesh layer is a nitrile rubber-sandwiched plastic mesh layer, and wherein the plastic mesh in said nitrile rubber-sandwiched plastic mesh layer is manufactured by 3D printing techniques.
5. The concrete piston seal of claim 4, wherein said plastic mesh is one of ABS, PC, PP and PA.
6. The concrete piston sealing body according to claim 1, wherein the peripheral sandwich layer and the bottom sandwich layer are formed by laminating fiber fabrics coated with rubber, and the rubber is nitrile rubber.
7. The concrete piston sealing body according to claim 6, wherein the fiber fabric is at least one of plain weave of cotton fiber, nylon fiber and polyester fiber.
8. The concrete piston seal of claim 1, wherein the acrylonitrile content of the NBR is greater than 40% by weight of the total mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810349896.2A CN108443499B (en) | 2018-04-18 | 2018-04-18 | Concrete piston sealing body and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810349896.2A CN108443499B (en) | 2018-04-18 | 2018-04-18 | Concrete piston sealing body and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108443499A CN108443499A (en) | 2018-08-24 |
| CN108443499B true CN108443499B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810349896.2A Active CN108443499B (en) | 2018-04-18 | 2018-04-18 | Concrete piston sealing body and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1355353A (en) * | 2001-12-24 | 2002-06-26 | 侯作启 | Rubber dam containing steel wire meshes and its making technology |
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| CN102777376A (en) * | 2012-08-07 | 2012-11-14 | 江苏润洲塑胶有限公司 | Novel concrete pump piston sealing piece for concrete pump |
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| CN204163977U (en) * | 2014-09-17 | 2015-02-18 | 青岛开世密封工业有限公司 | A kind of full double team cloth concrete piston |
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2018
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| CN101220190A (en) * | 2007-11-23 | 2008-07-16 | 广州机械科学研究院 | Fluororubber cloth clamp combination V seal ring and method for producing the same |
| CN102777376A (en) * | 2012-08-07 | 2012-11-14 | 江苏润洲塑胶有限公司 | Novel concrete pump piston sealing piece for concrete pump |
| CN104017259A (en) * | 2014-06-11 | 2014-09-03 | 青岛开世密封工业有限公司 | Cloth clamping concrete piston for high-pressure slurry pump and manufacturing method of piston |
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