CN113510040B - Automatic glue injection device and method for cuboid boundary high-pressure sealing requirement - Google Patents
Automatic glue injection device and method for cuboid boundary high-pressure sealing requirement Download PDFInfo
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- CN113510040B CN113510040B CN202110465310.0A CN202110465310A CN113510040B CN 113510040 B CN113510040 B CN 113510040B CN 202110465310 A CN202110465310 A CN 202110465310A CN 113510040 B CN113510040 B CN 113510040B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/002—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the work consisting of separate articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
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- 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
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/14—Sealings between relatively-stationary surfaces by means of granular or plastic material, or fluid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
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Abstract
The device comprises a box body, a box cover, a sealing pressing plate, an injection type rubber cylinder and a rubber injection and vacuumizing control system, a sample pressing block assembly is assembled in the box body and is pressed and fixed by the sealing pressing plate, a vacuum exhaust hole is formed in the box cover, a rubber injection hole is formed in the bottom of the box body, a vacuumizing air path of the rubber injection and vacuumizing control system is communicated with the vacuum exhaust hole, a rubber injection air path provides pushing pressure for the injection type rubber cylinder through the action of a driving air cylinder, and a rubber discharge port of the injection type rubber cylinder is communicated with the rubber injection hole in the bottom of the box. The method comprises the following steps: arranging an antifriction layer at the bottom of the box, assembling a sample pressing block assembly in the box, pasting a cushion block on the exposed surface at the lower end of the rock sample, wherein the thickness of the cushion block is half of the thickness difference value of the rock sample and a metal pressing block, inserting a sealing stop strip into a stepped groove of the metal pressing block, arranging the antifriction layer on the bottom surface of a sealing pressing plate, sequentially installing the sealing pressing plate and a box cover in place, vacuumizing and injecting glue, and after the glue injection is completed, waiting for glue solidification and then taking out the assembly.
Description
Technical Field
The invention belongs to the technical field of rock mechanics tests, and particularly relates to an automatic glue injection device and method for meeting the high-pressure sealing requirement of a cuboid boundary.
Background
The rock is a carrier of metal mineral resources, a storage body of oil and gas energy and an object body of tunnel engineering. The rock engineering excavation/mining behavior induces the stress field of the underground rock unit body to change, and is the main cause for inducing the rock engineering stress type geological disaster. Therefore, different types of rock mechanical tests on rock geological materials are needed to obtain mechanical parameters so as to guide rock engineering design.
The underground rock unit bodies interact with the peripheral rock unit bodies, and the rock unit bodies are generally subjected to compressive stress in three orthogonal directions and shear stress on the unit body surfaces in space; at the same time, for fluid action rock-like masses, the inner pores are subjected to a water or air pressure. How to simulate the stress state of an underground rock unit body in an indoor rock mechanics experiment needs to solve the boundary condition of a metal pressing block for transferring loading stress and a cuboid rock sample, which is important preparation work before the rock mechanics experiment.
At present, in order to truly simulate the stress environment of the underground rock unit body, a cuboid rock sample is adopted in most rock mechanical tests. Two schemes are provided for completing mechanical loading on a cuboid rock sample and alloy pressing block combination. The first scheme is as follows: six metal pressing blocks are adopted to be in contact with six surfaces of a cuboid rock sample, stress can be transferred to the rock sample theoretically, but the sealing problem of each edge of the rock is obviously required to be solved when the simulation of fluid behaviors (seepage, fracturing, adsorption and the like) in the rock sample is completed. Scheme II: four mutually buckled metal pressing blocks are adopted to transmit compressive stress to the peripheral surface of a cuboid rock test, for the purposes of rock deformation measurement and the like, the other two surfaces of the test sample adopt a high-pressure fluid environment in a high-pressure metal pressure chamber to transmit the compressive stress, but based on the rock effective stress theory, the high-pressure fluid in the pressure chamber and the rock surface must be separated, and therefore the sealing problem of the two exposed surfaces of the rock test sample and the edges of the relevant cuboid rock test sample needs to be solved.
In the rock mechanics test, high-pressure loading is carried out on fluid in a pressure chamber or the fluid mechanics behavior in a rock sample is simulated, the problem of interface sealing at the exposed surface and the edge of a cuboid rock sample and a metal pressing block assembly is solved, meanwhile, the sealing mode needs to be adapted to the problem that the metal pressing block transmits pressure stress of hundreds of MPa level to the rock surface deformation coordination, and the problem that the metal pressing block and the rock sample have relative deformation movement coordination of mm level.
The method for solving the cuboid boundary high-pressure sealing in the current rock mechanics test generally adopts high-viscosity fluid type sealant, is assisted by a fixing clamp, injects the high-viscosity sealant in a pure manual mode to fill gaps and surfaces, and enables a cuboid rock sample and a metal pressing block combination to form effective sealing after the sealant is cured for later rock mechanics tests of the same type. However, the manual injection gluing efficiency is low, the sealant filling difficulty at the edge of the metal pressing block is high, and the requirement on the experience of an operator in the glue injection process is high, so that the reliability of the sealing process is difficult to ensure.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the automatic glue injection device and method for meeting the high-pressure sealing requirement of the cuboid boundary, which have the characteristics of simple operation and no need of depending on the experience of an operator, and can effectively improve the sealing efficiency and the sealing process reliability of a cuboid rock sample and metal pressing block combination.
In order to achieve the purpose, the invention adopts the following technical scheme: an automatic glue injection device facing the high-pressure sealing requirement of a cuboid boundary comprises a box body, a box cover, a sealing pressing plate, an injection type glue cylinder and a glue injection and vacuumizing control system; the box body is of an open rectangular structure, a glue injection hole is formed in the middle of a bottom plate of the box body, and a glue injection joint is hermetically connected to the outer end of the glue injection hole; the box body is used for placing the sample pressing block assembly; press block locking tool holes are formed in the side wall plates on the four sides of the box body, and a pull ring type sealing plug is arranged in each press block locking tool hole; one group of adjacent side wall plates of the box body is used as a reference limiting plate of the sample pressing block assembly, the other group of adjacent side wall plates which are right opposite to the reference limiting plate are used as compression positioning plates of the sample pressing block assembly, compression positioning holes are formed in the compression positioning plates, and a sealing type compression positioning bolt is arranged in each compression positioning hole; the sealing pressure plate is positioned right above the sample pressing block assembly and inside the box body, a pressure plate fastening bolt is connected between the sealing pressure plate and the box body bottom plate, and a glue discharging hole is formed in the middle of the sealing pressure plate; the box cover is positioned right above the sealing pressure plate and is hermetically buckled at the opening of the box body, a silica gel sealing gasket is arranged between the box cover and the opening of the box body, and a box cover fastening bolt is connected between the box cover and the opening of the box body; a transparent observation window is arranged on the box body right above the glue discharging hole, a vacuum pumping hole and a vacuum pumping standby hole are formed in the box body on the side of the transparent observation window, a vacuum pumping connector is arranged in the vacuum pumping hole, and a countersunk plunger is arranged in the vacuum pumping standby hole; a first polytetrafluoroethylene film is laid on the upper surface of the box body bottom plate, and a second polytetrafluoroethylene film is attached to the lower surface of the sealing pressure plate; the glue injection and vacuum pumping control system comprises a gas source, a pneumatic triple piece, a vacuum generator, a double-acting cylinder, a two-position two-way control valve and a three-position four-way control valve; the air inlet end of the pneumatic triple piece is communicated with an air source, the air outlet end of the pneumatic triple piece is output in two paths, one path is communicated with the driving end of the vacuum generator through a two-position two-way control valve, and the other path is communicated with the double-acting cylinder through a three-position four-way control valve; the air exhaust end of the vacuum generator is communicated with the vacuum air exhaust joint on the box cover; the air port A of the three-position four-way control valve is communicated with the air outlet end of the pneumatic triple piece, the air port B of the three-position four-way control valve is externally connected with a silencer, the T air port of the three-position four-way control valve is communicated with the rodless cavity of the double-acting cylinder, and the P air port of the three-position four-way control valve is communicated with the rod cavity of the double-acting cylinder; the injection type rubber cylinder is filled with sealant, the piston end of the injection type rubber cylinder is coaxially and fixedly connected with the piston rod of the double-acting cylinder, and a glue discharging port of the injection type rubber cylinder is communicated with a glue injection joint on the bottom plate of the box body through a pipeline; the pneumatic triple piece is used for filtering moisture, adjusting pressure and adding oil mist to an air source.
The automatic glue injection method for the cuboid boundary high-pressure sealing requirement comprises the following steps:
the method comprises the following steps: coating a layer of Vaseline on the upper surface of an empty box body bottom plate, then laying a first polytetrafluoroethylene film on the upper surface of the box body bottom plate, and arranging a preformed hole on the first polytetrafluoroethylene film opposite to the glue injection hole, wherein the preformed hole and the glue injection hole are concentrically distributed when the first polytetrafluoroethylene film is laid;
step two: assembling a rock sample and a metal pressing block in the box body; preparing two adjusting cushion blocks, wherein the thickness of each adjusting cushion block is equal to half of the thickness difference between the rock sample and the metal pressing block, the adjusting cushion blocks are adhered to a set exposed surface of the rock sample and are uniformly distributed, the rock sample is placed on a box body bottom plate when the adjusting cushion blocks are in a downward state, the four metal pressing blocks clamp the rock sample in the middle in an end-to-end mode, and a sealing stop strip is inserted into a stepped groove of each metal pressing block;
step three: screwing a sealed compression positioning bolt, pushing a metal pressing block through the sealed compression positioning bolt to adjust the positions of the metal pressing block and a rock sample until the installation condition of a pressing block fastening bolt is met, then sending the pressing block fastening bolt into the box body through a pressing block locking tooling hole, loosely connecting the metal pressing block through the pressing block fastening bolt, and then sequentially screwing four pressing block fastening bolts to complete the tight connection of the metal pressing block, thus forming a sample pressing block assembly; finally, the sample pressing block assembly is tightly pushed against the inner surface of the side wall plate serving as a reference limiting plate on the box body through screwing the sealed compression positioning bolt, and then a pressing block locking tool hole is blocked by using a pull ring type sealing plug;
step four: coating a layer of vaseline on the lower surface of the sealing press plate, then attaching a second polytetrafluoroethylene film to the lower surface of the sealing press plate, and arranging a preformed hole on the second polytetrafluoroethylene film opposite to the glue discharge hole, wherein the preformed hole and the glue discharge hole are concentrically distributed when the second polytetrafluoroethylene film is attached; when the second polytetrafluoroethylene film is in a downward state, the sealing pressure plate is placed on the sample pressing block assembly, then a pressure plate fastening bolt is connected between the sealing pressure plate and the box body bottom plate, and finally the sample pressing block assembly is pressed by the sealing pressure plate through screwing the pressure plate fastening bolt;
step five: the box cover is buckled above the opening of the box body, so that the silica gel sealing gasket is accurately clamped between the box cover and the opening of the box body, then a box cover fastening bolt is connected between the box cover and the opening of the box body, and finally the box cover fastening bolt is screwed to complete the sealing connection between the box cover and the opening of the box body;
step six: the vacuum air exhaust joint on the box cover is connected with the air exhaust end of the vacuum generator through a pipeline, and the glue injection joint on the bottom plate of the box body is connected with the glue discharge port of the injection type glue cylinder through a pipeline;
step seven: starting an air source, then starting a two-position two-way control valve to conduct an air path between the air source and a vacuum generator, starting the vacuum generator to work under the driving of the air source, and forming vacuum negative pressure in the box body under the action of vacuum air suction;
step eight: opening a three-position four-way control valve to enable an air path between an air source and a rodless cavity of a double-acting air cylinder to be communicated, driving a piston rod of the double-acting air cylinder to extend out under the driving of the air source so as to drive a piston end of an injection type rubber cylinder to move and to push sealant in the injection type rubber cylinder to carry out sealant discharging, enabling the discharged sealant to enter a box body through a sealant injection joint under the double effects of pushing pressure and vacuum negative pressure, enabling the sealant to fill a gap between the lower surface of a rock sample and a bottom plate of the box body at first, and then enabling the sealant to continuously rise along a vertical channel formed by a sealing stop strip and a stepped groove until the sealant enters a gap between the upper surface of the rock sample and a sealing pressure plate;
step nine: checking the glue discharging condition of the glue discharging hole in the sealing pressing plate in real time through the transparent observation window, and when the sealant overflows from the glue discharging hole, indicating that the gap between the upper surface of the rock sample and the sealing pressing plate is also filled, closing the two-position two-way control valve at the moment, disconnecting the gas path between the gas source and the vacuum generator, and finishing the vacuumizing operation; simultaneously, controlling the three-position four-way control valve to change positions, so that the air path between the air source and the rod cavity of the double-acting air cylinder is conducted, the piston rod of the double-acting air cylinder retracts under the driving of the air source, and the glue discharging operation of the injection type glue cylinder is finished;
step ten: and after the sealing glue is cured, firstly removing the box cover fastening bolt, then removing the box cover, then removing the pressing plate fastening bolt, then removing the sealing pressing plate, then loosening the sealing type pressing positioning bolt to remove the limit of the sample pressing block assembly, and finally taking out the sample pressing block assembly after the gluing is finished from the box body.
The invention has the beneficial effects that:
the automatic glue injection device and method for meeting the high-pressure sealing requirement of the cuboid boundary have the advantages of being simple to operate and free of depending on experience of operators, and sealing efficiency and sealing process reliability of a cuboid rock sample and metal pressing block assembly can be effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of an automatic glue injection device facing the high-pressure sealing requirement of a cuboid boundary according to the present invention;
fig. 2 is a schematic structural diagram (partially cut away) of an automatic glue injection device for meeting the high-pressure sealing requirement of a cuboid boundary according to the present invention;
FIG. 3 is an exploded view of an automatic glue injection device for high pressure sealing requirements of cuboid boundaries according to the present invention;
FIG. 4 is a view (in plan view) showing a positional relationship between the case and the sample compact assembly according to the present invention;
FIG. 5 is a diagram (cross section) showing the positional relationship among the seal pressing plate, the rock sample, the metal pressing block and the bottom plate of the case body according to the present invention;
FIG. 6 is a schematic diagram of the glue injection and vacuum pumping control system of the present invention;
in the figure, 1-box body, 2-box cover, 3-sealing pressure plate, 4-glue injection hole, 5-glue injection joint, 6-briquetting locking tooling hole, 7-pull ring type sealing plug, 8-pressing positioning hole, 9-sealing pressing positioning bolt, 10-pressure plate fastening bolt, 11-glue discharging hole, 12-silica gel sealing gasket, 13-box cover fastening bolt, 14-transparent observation window, 15-vacuum pumping hole, 16-vacuum pumping spare hole, 17-vacuum pumping joint, 18-countersunk plunger, 19-first polytetrafluoroethylene film, 20-second polytetrafluoroethylene film, 21-air source, 22-pneumatic triplet, 23-vacuum generator, 24-double-acting cylinder, 25-two-position two-way control valve, 26-three-position four-way control valve, 27-rock sample, 28-metal briquetting, 29-concave arc chamfer, 30-stepped groove, 31-sealing stop strip, 32-briquetting fastening bolt, 33-adjusting cushion block, 34-silencer.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1 to 6, an automatic glue injection device for meeting the high-pressure sealing requirement of a cuboid boundary comprises a box body 1, a box cover 2, a sealing pressing plate 3, an injection type glue cylinder and a glue injection and vacuum pumping control system; the box body 1 is of an open rectangular structure, a glue injection hole 4 is formed in the middle of a bottom plate of the box body 1, and a glue injection joint 5 is connected to the outer end of the glue injection hole 4 in a sealing mode; the inside of the box body 1 is used for placing a sample pressing block assembly; press block locking tool holes 6 are formed in the side wall plates on four sides of the box body 1, and a pull ring type sealing plug 7 is arranged in each press block locking tool hole 6; one group of adjacent side wall plates of the box body 1 serves as a reference limiting plate of the sample press block assembly, the other group of adjacent side wall plates which are opposite to the reference limiting plate serve as compression positioning plates of the sample press block assembly, compression positioning holes 8 are formed in the compression positioning plates, and a sealing type compression positioning bolt 9 is arranged in each compression positioning hole 8; the sealing pressing plate 3 is positioned right above the sample pressing block assembly and inside the box body 1, a pressing plate fastening bolt 10 is connected between the sealing pressing plate 3 and a bottom plate of the box body 1, and a glue discharging hole 11 is formed in the middle of the sealing pressing plate 3; the box cover 2 is positioned right above the sealing pressure plate 3 and is hermetically buckled at the opening of the box body 1, a silica gel sealing gasket 12 is arranged between the box cover 2 and the opening of the box body 1, and a box cover fastening bolt 13 is connected between the box cover 2 and the opening of the box body 1; a transparent observation window 14 is arranged on the box body 1 right above the glue discharging hole 11, a vacuum pumping hole 15 and a vacuum pumping spare hole 16 are arranged on the box body 1 at the side of the transparent observation window 14, a vacuum pumping joint 17 is arranged in the vacuum pumping hole 15, and a countersunk plunger 18 is arranged in the vacuum pumping spare hole 16; a first polytetrafluoroethylene film 19 is laid on the upper surface of the bottom plate of the box body 1, and a second polytetrafluoroethylene film 20 is adhered to the lower surface of the sealing pressure plate 3; the glue injection and vacuum pumping control system comprises a gas source 21, a pneumatic triple piece 22, a vacuum generator 23, a double-acting cylinder 24, a two-position two-way control valve 25 and a three-position four-way control valve 26; the air inlet end of the pneumatic triple piece 22 is communicated with an air source 21, the air outlet end of the pneumatic triple piece 22 is output in two paths, one path is communicated with the driving end of the vacuum generator 23 through a two-position two-way control valve 25, and the other path is communicated with a double-acting cylinder 24 through a three-position four-way control valve 26; the air exhaust end of the vacuum generator 23 is communicated with the vacuum air exhaust joint 17 on the box cover 2; the air port A of the three-position four-way control valve 26 is communicated with the air outlet end of the pneumatic triple piece 22, the air port B of the three-position four-way control valve 26 is externally connected with a silencer 34, the air port T of the three-position four-way control valve 26 is communicated with the rodless cavity of the double-acting cylinder 24, and the air port P of the three-position four-way control valve 26 is communicated with the rod cavity of the double-acting cylinder 24; the injection type rubber cylinder is filled with sealant, the piston end of the injection type rubber cylinder is coaxially and fixedly connected with a piston rod of the double-acting air cylinder 24, and a glue discharging port of the injection type rubber cylinder is communicated with a glue injection joint 5 on a bottom plate of the box body 1 through a pipeline; the pneumatic triple piece 22 is used for filtering moisture, adjusting pressure and adding oil mist to the air source 21.
In this embodiment, the size of the rock sample 27 is 50 × 50 × 100mm, and the thicknesses of the four metal compacts 28 are all 55mm, that is, the difference between the thicknesses of the metal compacts 28 and the rock sample 27 is 5 mm; arc-shaped inward-concave chamfers 29 are respectively processed on the edges at the two sides of the rock sample contact surface of each metal pressing block 28 and the edges at the two sides of the adjacent metal pressing block contact surface, the radius of each arc-shaped inward-concave chamfer 29 is equal to half of the thickness difference between each metal pressing block 28 and the rock sample 27, namely the radius of each arc-shaped inward-concave chamfer 29 is 2.5 mm; step grooves 30 are processed on the contact surfaces of two adjacent metal pressing blocks 28, the depth of each step groove 30 is smaller than the width of the adjacent metal pressing block 28, and the height of each step groove 30 is 3.5 mm.
The automatic glue injection method for the cuboid boundary high-pressure sealing requirement comprises the following steps:
the method comprises the following steps: smearing a layer of vaseline on the upper surface of a bottom plate of an empty box body 1, then paving a first polytetrafluoroethylene film 19 on the upper surface of the bottom plate of the box body 1, and arranging a preformed hole on the first polytetrafluoroethylene film 19 opposite to the glue injection hole 4, wherein the preformed hole is ensured to be concentrically distributed with the glue injection hole 4 when the first polytetrafluoroethylene film 19 is paved; the purpose of coating vaseline is to avoid seam forming and dislocation of the first polytetrafluoroethylene film 19, and the first polytetrafluoroethylene film 19 is used as an anti-friction layer;
step two: assembling a rock sample 27 and a metal pressing block 28 in the box body 1; preparing two adjusting cushion blocks 33, wherein the thickness of each adjusting cushion block 33 is equal to half of the difference between the thicknesses of the rock sample 27 and the metal pressing blocks 28, the thickness of each adjusting cushion block 33 in the embodiment is 2.5mm, the adjusting cushion blocks 33 are adhered to a set exposed surface of the rock sample 27 and are uniformly distributed, the rock sample 27 is placed on the bottom plate of the box body 1 when the adjusting cushion blocks 33 are in a downward state, the four metal pressing blocks 28 clamp the rock sample 27 in the middle in an end-to-end mode, and meanwhile, a sealing stop strip 31 is inserted into a stepped groove 30 of each metal pressing block 28; the sealing stop strip 31 in this embodiment is a cork strip, the width of the cork strip is slightly larger than the groove height of the stepped groove 30, specifically set to be 3.53mm, and the length of the cork strip is equal to the thickness of the metal pressing block 28;
step three: screwing the sealed compression positioning bolt 9, pushing the metal pressing block 28 through the sealed compression positioning bolt 9 to adjust the positions of the metal pressing block 28 and the rock sample 27 until the installation condition of the pressing block fastening bolt 32 is met, then sending the pressing block fastening bolt 32 into the box body 1 through the pressing block locking tooling hole 6, loosely connecting the metal pressing block 28 through the pressing block fastening bolt 32, and then sequentially screwing the four pressing block fastening bolts 32 to complete the tight connection of the metal pressing block 28, thereby forming a sample pressing block assembly; finally, the sample pressing block assembly is tightly propped against the inner surface of the side wall plate serving as a reference limiting plate on the box body 1 by screwing the sealed pressing and positioning bolt 9, and then the pressing block locking tool hole 6 is blocked by using a pull ring type sealing plug 7;
step four: coating a layer of vaseline on the lower surface of the sealing pressing plate 3, then attaching a second polytetrafluoroethylene film 20 to the lower surface of the sealing pressing plate 3, and arranging a preformed hole on the second polytetrafluoroethylene film 20 opposite to the glue discharging hole 11, wherein the preformed hole on the second polytetrafluoroethylene film 20 is ensured to be concentrically distributed with the glue discharging hole 11 when the second polytetrafluoroethylene film 20 is attached; the purpose of applying the vaseline is to avoid the seam and dislocation of the second polytetrafluoroethylene film 20, and the second polytetrafluoroethylene film 20 is used as a friction reducing layer; when the second polytetrafluoroethylene film 20 is in a downward state, the sealing press plate 3 is placed on the sample press block assembly, then the upper press plate fastening bolt 10 is connected between the sealing press plate 3 and the bottom plate of the box body 1, and finally the pressing of the sealing press plate 3 on the sample press block assembly is completed by screwing the press plate fastening bolt 10;
step five: the box cover 2 is buckled above the opening of the box body 1, so that the silica gel sealing gasket 12 is accurately clamped between the box cover 2 and the opening of the box body 1, then a box cover fastening bolt 13 is connected between the box cover 2 and the opening of the box body 1, and finally the box cover fastening bolt 13 is screwed to complete the sealing connection of the box cover 2 and the opening of the box body 1;
step six: the vacuum air exhaust joint 17 on the box cover 2 is connected with the air exhaust end of the vacuum generator 23 through a pipeline, and the glue injection joint 5 on the bottom plate of the box body 1 is connected with the glue discharge port of the injection type glue cylinder through a pipeline;
step seven: starting the air source 21, then starting the two-position two-way control valve 25 to conduct the air path between the air source 21 and the vacuum generator 23, starting the vacuum generator 23 to work under the driving of the air source 21, and forming vacuum negative pressure in the box body 1 under the action of vacuum pumping;
step eight: opening a three-position four-way control valve 26 to enable an air path between an air source 21 and a rodless cavity of a double-acting cylinder 24 to be communicated, driving a piston rod of the double-acting cylinder 24 to extend out under the driving of the air source 21, further driving a piston end of an injection type rubber cylinder to move so as to push sealant in the injection type rubber cylinder to be discharged, enabling the discharged sealant to enter a box body 1 through a glue injection joint 5 under the double effects of pushing pressure and vacuum negative pressure, filling the gap between the lower surface of a rock sample 27 and a bottom plate of the box body 1 with the sealant, and then continuously rising along a vertical channel formed by a sealing stop strip 31 and a stepped groove 30 until the sealant enters the gap between the upper surface of the rock sample 27 and a sealing pressing plate 3;
step nine: checking the glue discharging condition of the glue discharging hole 11 in the sealing pressing plate 3 in real time through the transparent observation window 14, and when sealing glue overflows from the glue discharging hole 11, indicating that a gap between the upper surface of the rock sample 27 and the sealing pressing plate 3 is also filled, closing the two-position two-way control valve 25 at the moment, so that the gas path between the gas source 21 and the vacuum generator 23 is disconnected, and finishing the vacuum pumping operation; meanwhile, the three-position four-way control valve 26 is controlled to change positions, so that the air path between the air source 21 and the rod cavity of the double-acting air cylinder 24 is conducted, the piston rod of the double-acting air cylinder 24 retracts under the driving of the air source 21, and the glue discharging operation of the injection type glue cylinder is finished;
step ten: after the sealing glue is cured, firstly removing the box cover fastening bolt 13, then removing the box cover 2, then removing the pressing plate fastening bolt 10, then removing the sealing pressing plate 3, then loosening the sealing type pressing positioning bolt 9 to remove the limit of the sample pressing block assembly, and finally taking out the sample pressing block assembly after the gluing is finished from the box body 1.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are intended to be included in the scope of the present invention.
Claims (2)
1. The utility model provides an automatic injecting glue device towards cuboid boundary high-pressure seal demand which characterized in that: comprises a box body, a box cover, a sealing pressing plate, an injection type rubber cylinder and a glue injection and vacuum pumping control system; the box body is of an open rectangular structure, a glue injection hole is formed in the middle of a bottom plate of the box body, and a glue injection joint is hermetically connected to the outer end of the glue injection hole; the box body is used for placing the sample pressing block assembly; press block locking tool holes are formed in the side wall plates on the four sides of the box body, and a pull ring type sealing plug is arranged in each press block locking tool hole; one group of adjacent side wall plates of the box body is used as a reference limiting plate of the sample pressing block assembly, the other group of adjacent side wall plates which are right opposite to the reference limiting plate are used as compression positioning plates of the sample pressing block assembly, compression positioning holes are formed in the compression positioning plates, and a sealing type compression positioning bolt is arranged in each compression positioning hole; the sealing pressure plate is positioned right above the sample pressing block assembly and inside the box body, a pressure plate fastening bolt is connected between the sealing pressure plate and the box body bottom plate, and a glue discharging hole is formed in the middle of the sealing pressure plate; the box cover is positioned right above the sealing pressure plate and is hermetically buckled at the opening of the box body, a silica gel sealing gasket is arranged between the box cover and the opening of the box body, and a box cover fastening bolt is connected between the box cover and the opening of the box body; a transparent observation window is arranged on the box body right above the glue discharging hole, a vacuum pumping hole and a vacuum pumping standby hole are formed in the box body on the side of the transparent observation window, a vacuum pumping connector is arranged in the vacuum pumping hole, and a countersunk plunger is arranged in the vacuum pumping standby hole; a first polytetrafluoroethylene film is laid on the upper surface of the box body bottom plate, and a second polytetrafluoroethylene film is attached to the lower surface of the sealing pressure plate; the glue injection and vacuum pumping control system comprises a gas source, a pneumatic triple piece, a vacuum generator, a double-acting cylinder, a two-position two-way control valve and a three-position four-way control valve; the air inlet end of the pneumatic triple piece is communicated with an air source, the air outlet end of the pneumatic triple piece is output in two paths, one path is communicated with the driving end of the vacuum generator through a two-position two-way control valve, and the other path is communicated with the double-acting cylinder through a three-position four-way control valve; the air exhaust end of the vacuum generator is communicated with the vacuum air exhaust joint on the box cover; the air port A of the three-position four-way control valve is communicated with the air outlet end of the pneumatic triple piece, the air port B of the three-position four-way control valve is externally connected with a silencer, the T air port of the three-position four-way control valve is communicated with the rodless cavity of the double-acting cylinder, and the P air port of the three-position four-way control valve is communicated with the rod cavity of the double-acting cylinder; the injection type rubber cylinder is filled with sealant, the piston end of the injection type rubber cylinder is coaxially and fixedly connected with the piston rod of the double-acting cylinder, and a glue discharging port of the injection type rubber cylinder is communicated with a glue injection joint on the bottom plate of the box body through a pipeline; the pneumatic triple piece is used for filtering moisture, adjusting pressure and adding oil mist to an air source.
2. An automatic glue injection method facing to the high-pressure sealing requirement of the cuboid boundary adopts the automatic glue injection device facing to the high-pressure sealing requirement of the cuboid boundary, which is characterized by comprising the following steps:
the method comprises the following steps: coating a layer of Vaseline on the upper surface of an empty box body bottom plate, then laying a first polytetrafluoroethylene film on the upper surface of the box body bottom plate, and arranging a preformed hole on the first polytetrafluoroethylene film opposite to the glue injection hole, wherein the preformed hole and the glue injection hole are concentrically distributed when the first polytetrafluoroethylene film is laid;
step two: assembling a rock sample and a metal pressing block in the box body; preparing two adjusting cushion blocks, wherein the thickness of each adjusting cushion block is equal to half of the thickness difference between the rock sample and the metal pressing block, the adjusting cushion blocks are adhered to a set exposed surface of the rock sample and are uniformly distributed, the rock sample is placed on a box body bottom plate when the adjusting cushion blocks are in a downward state, the four metal pressing blocks clamp the rock sample in the middle in an end-to-end mode, and a sealing stop strip is inserted into a stepped groove of each metal pressing block;
step three: screwing a sealed compression positioning bolt, pushing a metal pressing block through the sealed compression positioning bolt to adjust the positions of the metal pressing block and a rock sample until the installation condition of a pressing block fastening bolt is met, then sending the pressing block fastening bolt into the box body through a pressing block locking tooling hole, loosely connecting the metal pressing block through the pressing block fastening bolt, and then sequentially screwing four pressing block fastening bolts to complete the tight connection of the metal pressing block, thus forming a sample pressing block assembly; finally, the sample pressing block assembly is tightly pushed against the inner surface of the side wall plate serving as a reference limiting plate on the box body through screwing the sealed compression positioning bolt, and then a pressing block locking tool hole is blocked by using a pull ring type sealing plug;
step four: coating a layer of vaseline on the lower surface of the sealing press plate, then attaching a second polytetrafluoroethylene film to the lower surface of the sealing press plate, and arranging a preformed hole on the second polytetrafluoroethylene film opposite to the glue discharge hole, wherein the preformed hole and the glue discharge hole are concentrically distributed when the second polytetrafluoroethylene film is attached; when the second polytetrafluoroethylene film is in a downward state, the sealing pressure plate is placed on the sample pressing block assembly, then a pressure plate fastening bolt is connected between the sealing pressure plate and the box body bottom plate, and finally the sample pressing block assembly is pressed by the sealing pressure plate through screwing the pressure plate fastening bolt;
step five: the box cover is buckled above the opening of the box body, so that the silica gel sealing gasket is accurately clamped between the box cover and the opening of the box body, then a box cover fastening bolt is connected between the box cover and the opening of the box body, and finally the box cover fastening bolt is screwed to complete the sealing connection between the box cover and the opening of the box body;
step six: the vacuum air exhaust joint on the box cover is connected with the air exhaust end of the vacuum generator through a pipeline, and the glue injection joint on the bottom plate of the box body is connected with the glue discharge port of the injection type glue cylinder through a pipeline;
step seven: starting an air source, then starting a two-position two-way control valve to conduct an air path between the air source and a vacuum generator, starting the vacuum generator to work under the driving of the air source, and forming vacuum negative pressure in the box body under the action of vacuum air suction;
step eight: opening a three-position four-way control valve to enable an air path between an air source and a rodless cavity of a double-acting air cylinder to be communicated, driving a piston rod of the double-acting air cylinder to extend out under the driving of the air source so as to drive a piston end of an injection type rubber cylinder to move and to push sealant in the injection type rubber cylinder to carry out sealant discharging, enabling the discharged sealant to enter a box body through a sealant injection joint under the double effects of pushing pressure and vacuum negative pressure, enabling the sealant to fill a gap between the lower surface of a rock sample and a bottom plate of the box body at first, and then enabling the sealant to continuously rise along a vertical channel formed by a sealing stop strip and a stepped groove until the sealant enters a gap between the upper surface of the rock sample and a sealing pressure plate;
step nine: checking the glue discharging condition of the glue discharging holes in the sealing pressing plate in real time through the transparent observation window, when the sealant overflows from the glue discharging holes, indicating that the gap between the upper surface of the rock sample and the sealing pressing plate is also filled, closing the two-position two-way control valve at the moment, disconnecting the air path between the air source and the vacuum generator, and finishing the vacuum pumping operation; simultaneously, controlling the three-position four-way control valve to change positions, so that the air path between the air source and the rod cavity of the double-acting air cylinder is conducted, the piston rod of the double-acting air cylinder retracts under the driving of the air source, and the glue discharging operation of the injection type glue cylinder is finished;
step ten: and after the sealing glue is cured, firstly removing the box cover fastening bolt, then removing the box cover, then removing the pressing plate fastening bolt, then removing the sealing pressing plate, then loosening the sealing type pressing positioning bolt to remove the limit of the sample pressing block assembly, and finally taking out the sample pressing block assembly after the gluing is finished from the box body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110465310.0A CN113510040B (en) | 2021-04-28 | 2021-04-28 | Automatic glue injection device and method for cuboid boundary high-pressure sealing requirement |
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| CN202110465310.0A CN113510040B (en) | 2021-04-28 | 2021-04-28 | Automatic glue injection device and method for cuboid boundary high-pressure sealing requirement |
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| CN204159506U (en) * | 2014-07-11 | 2015-02-18 | 中国石油化工股份有限公司 | For the glue injection machine of high die-casting body instrument |
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