CN110939378A - Glued full-insulation ladder and special glue - Google Patents
Glued full-insulation ladder and special glue Download PDFInfo
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- CN110939378A CN110939378A CN201911123228.9A CN201911123228A CN110939378A CN 110939378 A CN110939378 A CN 110939378A CN 201911123228 A CN201911123228 A CN 201911123228A CN 110939378 A CN110939378 A CN 110939378A
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
- E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
- E06C1/10—Sections fitted end to end
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/50—Joints or other connecting parts
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- 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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Insulating Bodies (AREA)
Abstract
The invention relates to a glued type all-insulated ladder, which belongs to the technical field of insulated ladders and comprises two parallel vertical supporting rods and a plurality of supporting transverse rods, wherein connecting pieces are arranged at two ends of each supporting transverse rod and between the two vertical supporting rods, each connecting piece comprises a first fixing sleeve for being sleeved on the outer peripheral surface of each vertical supporting rod, a connecting sleeve fixedly arranged on the outer peripheral surface of the first fixing sleeve, a second fixing sleeve for being sleeved on the outer peripheral surface of each horizontal supporting rod, an inserting and connecting block fixedly arranged at one end of the second fixing sleeve in an extending mode, and a positioning glue injection through hole formed in the inserting and connecting block, the connecting sleeve is provided with an inserting and connecting groove matched with the inserting and connecting block, the inner side wall of the first fixing sleeve is provided with an accommodating groove. This glued joint formula all insulation ladder has realized supporting the horizontal pole and has supported the connection dismantled of montant, has increased the insulating nature of all insulation ladder moreover, has avoided simultaneously supporting the horizontal pole, supporting the montant and has reduced the influence of its intensity because of punching.
Description
Technical Field
The invention relates to the technical field of insulating ladders, in particular to a glued full-insulating ladder and special glue.
Background
The insulating ladder is mainly used for special climbing tools in electric power engineering, telecommunication engineering, electrical engineering, hydroelectric engineering and the like, and has good insulating characteristics.
The insulating ladder in the prior art generally comprises two vertical supporting rods, a supporting cross rod is arranged between the two vertical supporting rods, two ends of the supporting cross rod are fixedly arranged on the vertical supporting rods by some people, because the supporting transverse rods and the supporting vertical rods are fixedly connected, the transportation of the insulating ladder is inconvenient, and therefore, a part of people are also in threaded connection with the fixing screw rods on the supporting transverse rods, one ends of the fixing screw rods, far away from the supporting transverse rods, penetrate through the supporting vertical rods and are in threaded connection with the fixing nuts, the detachable connection of the supporting cross rod and the supporting vertical rod is realized through the mutual matching of the fixing screw rod and the fixing nut, so that the transportation of the insulating ladder is more convenient, however, by adopting the mode, the mounting holes are inevitably required to be arranged on the supporting transverse rod and the supporting vertical rod, so that the strength of the supporting vertical rod and the supporting transverse rod is reduced, and because the fixing screw and the fixing nut have conductivity, the conductivity of the insulating ladder is increased.
Disclosure of Invention
The invention aims to provide a glued type all-insulated ladder, wherein a supporting transverse rod is spliced with a connecting sleeve, the supporting transverse rod and a supporting vertical rod are detachably connected, the supporting transverse rod and a second fixing sleeve are fixedly connected with the supporting vertical rod and a first fixing sleeve respectively through glue, the insulativity of the all-insulated ladder is increased, and the influence that the strength of the supporting transverse rod and the supporting vertical rod is reduced due to punching is avoided.
The technical purpose of the invention is realized by the following technical scheme:
a glued type all-insulated ladder comprises two parallel vertical supporting rods, a plurality of supporting cross rods uniformly arranged between the two vertical supporting rods, connecting pieces respectively arranged at two ends of the supporting cross rods and between the two vertical supporting rods, wherein each connecting piece comprises a first fixing sleeve for being sleeved on the outer peripheral surface of the corresponding vertical supporting rod, a connecting sleeve fixedly arranged on the outer peripheral surface of the first fixing sleeve and used for being sleeved on the outer peripheral surface of the corresponding horizontal supporting rod, a second fixing sleeve for being sleeved on the outer peripheral surface of the corresponding horizontal supporting rod, an inserting block fixedly extended at one end of the second fixing sleeve, and a positioning glue injection through hole formed in the inserting block, the connecting sleeve is perpendicular to the first fixing sleeve, one end, away from the first fixing sleeve, of the connecting sleeve is provided with an inserting groove matched with the inserting block, the inner side wall of the first fixing sleeve is provided with a circle of accommodating groove, the both ends that hold the recess do not run through first fixed sleeve lateral wall, the injecting glue through-hole that is linked together with holding the recess is seted up to first fixed sleeve's outer peripheral face.
Through adopting the above technical scheme, first fixed sleeve passes through glue and supports montant fixed connection, the fixed sleeve of second passes through glue and supports horizontal pole fixed connection, and support horizontal pole and adapter sleeve and peg graft, not only realized supporting the horizontal pole and supporting the connection dismantled of montant, and the insulating nature of full insulating ladder has been increased, the support horizontal pole has been avoided simultaneously, support the montant and reduce the influence of its intensity because of punching, because mutually supporting of grafting piece and grafting recess, not only fix a position the position of supporting the horizontal pole, make two support montants keep parallel, and make the installation of glued box-like insulating ladder more stable, it is more convenient.
The invention is further configured to: the outer peripheral face at first fixed sleeve both ends has set firmly first beaded finish respectively, first beaded finish outer peripheral face is provided with first backup pad, the other end in being close to injecting glue through-hole one end and is provided with the second backup pad, first beaded finish one end is kept away from to first beaded finish one end for the plane in first backup pad, second backup pad.
Through adopting above-mentioned technical scheme, first beaded finish has increased first fixed telescopic intensity, and the mutually supporting of first backup pad, second backup pad can make first backup pad or second backup pad and ground inconsistent when first fixed sleeve level is placed, has increased the stability that first fixed sleeve level was placed, when the injecting glue in to the injecting glue through-hole in addition, makes second backup pad and ground inconsistent, has improved the stability of injecting glue.
The invention is further configured to: the outer peripheral face of the first fixing sleeve is provided with a third supporting plate at one end far away from the glue injection through hole, and one end, far away from the first fixing sleeve, of the third supporting plate is a plane.
Through adopting above-mentioned technical scheme, when injecting glue in to the injecting glue through-hole, third backup pad and ground are inconsistent, have further improved the stability that first fixed sleeve level was placed, and first fixed sleeve supports subaerial through the third backup pad in holding groove moreover, has further improved the stability of injecting glue.
The invention is further configured to: and a first connecting ring is arranged on the peripheral surface of the first fixing sleeve at the position of the glue injection through hole.
Through adopting above-mentioned technical scheme, increased first fixed sleeve in the intensity of injecting glue through-hole department, but also increased the area of injecting glue through-hole, made in the more smooth entering of glue holds the recess to realize first fixed sleeve and support the fixed of montant.
The invention is further configured to: the end faces of the two ends of the insertion block in the circumferential direction of the second fixing sleeve are inclined planes.
Through adopting above-mentioned technical scheme, not only make grafting of grafting piece and connecting sleeve more convenient, increased the area of contact of grafting piece and grafting recess moreover, when supporting the montant and setting up along the direction of height, connecting sleeve applys ascending effort to the grafting piece, and the grafting piece is applyed the effort to supporting the horizontal pole through second fixed sleeve, consequently, has increased the effort that supports horizontal pole and connecting sleeve, makes the installation, the use of supporting the horizontal pole more stable.
The invention is further configured to: the number of the inserting blocks is two, and the two inserting blocks are symmetrically arranged.
Through adopting above-mentioned technical scheme, two splicing block have not only increased the area of contact of second fixed sleeve and connecting sleeve, have improved the stability of second fixed sleeve and connecting sleeve, can not make its installation loaded down with trivial details, difficulty owing to the quantity of splicing block is too much moreover, and two splicing block symmetries set up simultaneously, make its processing, use more convenient.
The invention is further configured to: and a second connecting ring is arranged on the peripheral surface of the inserting block at the position of the glue-injecting through hole.
Through adopting above-mentioned technical scheme, increased the intensity of second fixed sleeve in location injecting glue through-hole department, but also increased the area of contact of second fixed sleeve and glue, made glue more smooth get into in the injecting glue through-hole to increase the stability that second fixed sleeve and support the horizontal pole are connected.
The invention aims to provide glue for a special glued type all-insulated ladder, which has the advantages of high bonding strength and shear strength through the synergistic effect of raw materials, and has low curing shrinkage rate, so that the use requirement of high strength of the all-insulated ladder can be better met.
The technical purpose of the invention is realized by the following technical scheme:
the glue for the special glued full-insulation ladder comprises, by weight, 55-65 parts of novolac epoxy resin, 14-16 parts of liquid crystal epoxy resin, 6.5-7.5 parts of 4, 4' -diaminodiphenyl sulfone, 7.5-8.5 parts of tert-butylphenol glycidyl ether, 9-15 parts of ultrafine silicon dioxide, 1-5 parts of ultrafine aluminum oxide, 4-10 parts of aluminum borate whisker and 4.5-6 parts of a silane coupling agent.
By adopting the technical scheme, the liquid crystal epoxy resin is added into the raw materials, so that the bonding strength and the shearing strength of the glue are increased, the silica ultrafine powder and the alumina ultrafine powder are added into the raw materials, and the bonding strength and the shearing strength of the glue are increased through the synergistic effect of the silica ultrafine powder and the alumina ultrafine powder, the curing shrinkage rate of the glue is also reduced, and the glue has good use effect.
The invention is further configured to: the raw materials comprise, by weight, 60 parts of novolac epoxy resin, 15 parts of liquid crystal epoxy resin, 7 parts of 4, 4' -diaminodiphenyl sulfone, 8 parts of tert-butylphenol glycidyl ether, 12 parts of superfine silicon dioxide, 3 parts of superfine aluminum oxide, 6 parts of aluminum borate whisker and 5 parts of silane coupling agent.
By adopting the technical scheme, the raw materials of the glue are further optimized, the bonding strength and the shearing strength of the glue are improved, and the curing shrinkage rate of the glue is reduced.
In conclusion, the invention has the following beneficial effects:
1. according to the glued type all-insulation ladder, the supporting transverse rod is spliced with the connecting sleeve, so that the supporting transverse rod is detachably connected with the supporting vertical rod, the supporting transverse rod is fixedly connected with the second fixing sleeve, the supporting vertical rod is fixedly connected with the first fixing sleeve through glue, the insulativity of the all-insulation ladder is increased, and the influence that the strength of the supporting transverse rod and the strength of the supporting vertical rod are reduced due to punching is avoided.
2. Set up first backup pad, second backup pad, third backup pad on first fixed sleeve to through mutually supporting between the three, not only increased first fixed sleeve's intensity, increased the stability that first fixed sleeve level was placed moreover, be convenient for to the injecting glue in the injecting glue through-hole, still make first fixed sleeve have convenient to use's advantage simultaneously.
3. The first connecting ring is arranged at the position of the glue injection through hole, so that glue can smoothly enter the accommodating groove, and the first fixing sleeve and the supporting vertical rod are fixed; the second connecting ring is arranged at the position of the glue injection through hole, so that glue can enter the glue injection through hole more smoothly, and the connection stability of the second fixing sleeve and the supporting cross rod is improved.
4. The special gluing type all-insulation ladder glue disclosed by the invention has the advantages of higher bonding strength and shearing strength through the synergistic effect of the raw materials, and also has lower curing shrinkage rate, so that the use requirement of high strength of an all-insulation ladder can be better met.
5. The liquid crystal epoxy resin is added into the raw materials of the glue, so that the bonding strength and the shearing strength of the glue are improved, the silicon dioxide ultrafine powder and the aluminum oxide ultrafine powder are added into the raw materials of the glue, and the glue has good use effect through the synergistic effect of the silicon dioxide ultrafine powder and the aluminum oxide ultrafine powder.
Drawings
FIG. 1 is a schematic structural view of an embodiment;
FIG. 2 is a schematic view for showing the structure of the connector;
FIG. 3 is a schematic view of the structure of the connector;
fig. 4 is a schematic view for showing the structure of the second support plate.
In the figure, 1, a vertical support rod is supported; 2. a support rail; 3. a connecting member; 31. a first fixed sleeve; 311. an accommodating recess; 312. a weight-reducing groove; 313. injecting glue through holes; 32. a first connecting ring; 33. a first stiffener ring plate; 331. a first support plate; 332. a second support plate; 34. a third support plate; 35. a connecting sleeve; 351. inserting grooves; 36. a second fixed sleeve; 37. a second stiffener ring plate; 38. an insertion block; 381. positioning the glue injection through hole; 39. the second connecting ring.
Detailed Description
The present invention will be described in further detail with reference to examples. It should be understood that the preparation methods described in the examples are only for illustrating the present invention and are not to be construed as limiting the present invention, and that the simple modifications of the preparation methods of the present invention based on the concept of the present invention are within the scope of the present invention as claimed.
Embodiment 1, a glued all-insulated ladder, as shown in fig. 1, includes two parallel support montants 1, and the cross-section of support montant 1 is circular setting. A plurality of supporting cross rods 2 are uniformly arranged between the two supporting vertical rods 1 along the length direction of the supporting vertical rods, and the cross sections of the supporting cross rods 2 are in a circular arrangement. The two ends of the supporting cross rod 2 and the two supporting vertical rods 1 are respectively provided with a connecting piece 3 for realizing the insertion connection of the two supporting vertical rods.
As shown in fig. 2 and fig. 3, the connecting member 3 includes a first fixing sleeve 31 for being sleeved on the outer peripheral surface of the support vertical rod 1, the cross section of the first fixing sleeve 31 is in a circular ring shape, an accommodating groove 311 for accommodating glue is provided in the middle position of the inner side wall of the first fixing sleeve 31, the cross section of the accommodating groove 311 is in a circular ring shape, the two ends of the accommodating groove 311 along the axial direction of the first fixing sleeve 31 do not penetrate through the side wall of the first fixing sleeve 31, and the glue is prevented from flowing out from the accommodating groove 311. The inner side walls of the two ends of the first fixing sleeve 31 are respectively provided with a circle of weight reducing grooves 312, and the weight reducing grooves 312 are not communicated with the accommodating grooves 311. The side wall of the first fixing sleeve 31 is provided with a glue injection through hole 313 communicated with the accommodating groove 311, the outer peripheral surface of the first fixing sleeve 31 is fixedly provided with a first connecting ring 32 at the glue injection through hole 313, and the first connecting ring 32 enables glue to enter the accommodating groove 311 more smoothly. The outer peripheral surfaces of the two ends of the first fixing sleeve 31 are respectively and fixedly provided with a circle of first reinforcing ring plate 33, and the cross section of each first reinforcing ring plate 33 is arranged in a circular ring shape. First beaded finish 33 outer peripheral face is in being close to injecting glue through-hole 313 one end and has set firmly first backup pad 331, the terminal surface that first beaded finish 33 one end was kept away from to first backup pad 331 sets up to the plane, it is shown in combination figure 4, first beaded finish 33 outer peripheral face has set firmly second backup pad 332 in keeping away from injecting glue through-hole 313 one end, the terminal surface that first beaded finish 33 one end was kept away from to second backup pad 332 also sets up to the plane, the outer peripheral face of first fixed sleeve 31 has set firmly third backup pad 34 in keeping away from injecting glue through-hole 313 one end, the terminal surface that first fixed sleeve 31 one end was kept away from to third backup pad 34 also sets up to the plane.
When first fixed sleeve 31 cover was established on supporting montant 1, the inside wall of first fixed sleeve 31 and the outer peripheral face of supporting montant 1 inconsistent, then through injecting glue through-hole 313 to holding the interior glue of injecting of recess 311, treat that glue solidifies the back, realize first fixed sleeve 31 and the fixed of supporting montant 1, owing to need not punch on supporting montant 1, avoided supporting montant 1 because of punching and reduce the influence of its intensity.
When first fixed sleeve 31 level was placed, can make first backup pad 331 and ground inconsistent, also can make first backup pad 331, second backup pad 332, third backup pad 34 and ground inconsistent, increased the stability that first fixed sleeve 31 level was placed, when injecting glue in to injecting glue through-hole 313, make second backup pad 332, third backup pad 34 and ground inconsistent, improved the stability of injecting glue.
As shown in fig. 3 and 4, a connecting sleeve 35 for sleeving the outer peripheral surface of the supporting cross bar 2 is fixedly arranged on the outer peripheral surface of the first fixing sleeve 31, the cross section of the connecting sleeve 35 is arranged in a circular ring shape, and the connecting sleeve 35 is perpendicular to the first fixing sleeve 31. The outer peripheral surface of the support cross rod 2 is sleeved with a second fixed sleeve 36 matched with the support cross rod, and the cross section of the second fixed sleeve 36 is arranged in a circular ring shape. The outer peripheral surface of one end of the second fixed sleeve 36 is fixedly provided with a circle of second reinforcing ring plate 37, and the cross section of the second reinforcing ring plate 37 is arranged in a circular ring shape. Two symmetrical insertion blocks 38 are fixedly arranged at one end, far away from the second reinforcing ring plate 37, of the second fixing sleeve 36 in an extending manner, and end faces of two ends of each insertion block 38 in the circumferential direction of the second fixing sleeve 36 are inclined planes. The plug-in block 38 is provided with a positioning glue injection through hole 381, and a second connecting ring 39 is fixedly arranged on the outer peripheral surface of the plug-in block 38 at the positioning glue injection through hole 381. One end of the connecting sleeve 35, which is far away from the first fixing sleeve 31, is provided with an insertion groove 351 matched with the insertion block 38, and the first fixing sleeve 31 and the connecting sleeve 35 are inserted through the insertion block 38.
When the fixed sleeve 36 cover of second was established on supporting horizontal pole 2, the inside wall of the fixed sleeve 36 of second and the outer peripheral face of supporting horizontal pole 2 were inconsistent, then injected glue into location injecting glue through-hole 381, waited the glue solidification back, realized the fixed of the fixed sleeve 36 of second and supporting horizontal pole 2, owing to need not punch on supporting horizontal pole 2, avoided supporting horizontal pole 2 because of the influence that punches and reduce its intensity.
The mounting method of the glued type all-insulated ladder comprises the following steps: first fixed sleeve 31 cover is established on supporting montant 1 outer peripheral face at first, and through injecting glue in to injecting glue through-hole 313, realize first fixed sleeve 31 and support montant 1 fixed, then establish second fixed sleeve 36 cover on supporting horizontal pole 2 outer peripheral face, and through injecting glue in to location injecting glue through-hole 381, realize second fixed sleeve 36 and support horizontal pole 2 fixed, later will support in the one end of horizontal pole 2 inserts connecting sleeve 35, connecting sleeve 35's inside wall and support horizontal pole 2 are inconsistent, and grafting piece 38 is located grafting recess 351, realize supporting horizontal pole 2 and the connection of dismantling of supporting montant 1.
Set up on second fixed sleeve 36 and insert piece 38, through mutually supporting of inserting piece 38 and grafting recess 351, not only fix a position the position of supporting horizontal pole 2, make two support montant 1 keep parallel, and make the installation of glued formula insulating ladder more convenient, and increased the area of contact between supporting horizontal pole 2 and the connecting sleeve 35, increased the effort between supporting horizontal pole 2 and the connecting sleeve 35, make the installation that supports horizontal pole 2, use more stable, more convenient.
Example 2, a glue for a special glued all-insulated ladder, the raw material ratio of which is shown in table 1.
S1, adding liquid crystal epoxy resin into the novolac epoxy resin, and uniformly mixing, wherein the novolac epoxy resin is selected from Shandongde source epoxy science and technology Co., Ltd, and the liquid crystal epoxy resin is selected from Korean SHIN-A T & C;
s2, adding tert-butyl phenol glycidyl ether, superfine silicon dioxide, superfine aluminum oxide, aluminum borate whisker and a silane coupling agent, and uniformly mixing, wherein the tert-butyl phenol glycidyl ether is selected from Shanghai Cai Youki industries, the superfine silicon dioxide and the superfine aluminum oxide are selected from Xuancheng Jingrui new materials, the aluminum borate whisker is selected from Jinnan Zi chemical industry, and the silane coupling agent is selected from Nanjing warp Tianyu chemical industry, Inc.;
and S3, adding 4,4 '-diaminodiphenyl sulfone, and uniformly mixing to obtain the glue, wherein the 4, 4' -diaminodiphenyl sulfone is selected from Shanghai Hebao chemical industry Co., Ltd.
Examples 3 to 8, a glue for a special glued all-insulated ladder, which is different from example 2 in the raw material ratio shown in table 1.
Comparative example 1, a commercially available epoxy glue, THG-8020, was used.
Comparative example 2, this comparative example differs from example 3 in that no liquid crystal epoxy resin was added to the glue.
Comparative example 3, the difference between this comparative example and example 3 is that no silica micropowder or alumina micropowder is added to the glue.
Comparative example 4, this comparative example differs from example 3 in that no ultrafine silica powder was added to the glue.
Comparative example 5, this comparative example differs from example 3 in that no ultrafine alumina powder was added to the glue.
TABLE 1 content (unit: Kg) of each raw material in examples
| Examples | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Novolac epoxy resin | 55 | 60 | 65 | 60 | 60 | 60 | 60 |
| Liquid crystal epoxy resin | 7 | 6 | 5 | 5.5 | 6.5 | 6 | 6 |
| 4, 4' -diaminodiphenyl sulfone | 6.5 | 7 | 7.5 | 7 | 7 | 7 | 7 |
| Tert-butyl phenol glycidyl ether | 7.5 | 8 | 8.5 | 8 | 8 | 8 | 8 |
| Ultra-fine silica | 9 | 12 | 15 | 12 | 12 | 10 | 14 |
| Superfine aluminium oxide | 1 | 3 | 5 | 3 | 3 | 2 | 4 |
| Aluminium borate whisker | 4 | 6 | 10 | 6 | 6 | 6 | 6 |
| Silane coupling agent | 6 | 5 | 4.5 | 5 | 5 | 5 | 5 |
After the glue prepared in examples 2-8 and comparative examples 1-5 was cured, the following performance tests were performed, and the test results are shown in table 2.
TABLE 2 test results
| Detecting items | Percent of curing shrinkage% | Bonding Strength/(MPa) | Shear strength/(MPa) |
| Example 2 | 1.7 | 10.7 | 25 |
| Example 3 | 1.1 | 12.1 | 32 |
| Example 4 | 1.8 | 10.6 | 26 |
| Example 5 | 1.2 | 11.1 | 27 |
| Example 6 | 1.2 | 11.3 | 28 |
| Example 7 | 1.4 | 11.5 | 30 |
| Example 8 | 1.3 | 11.6 | 31 |
| Comparative example 1 | 2.5 | 7.4 | 18 |
| Comparative example 2 | 1.2 | 8.6 | 18 |
| Comparative example 3 | 2.3 | 9.4 | 20 |
| Comparative example 4 | 2.0 | 9.6 | 21 |
| Comparative example 5 | 2.1 | 9.8 | 22 |
As can be seen from Table 2, the special glue provided by the invention improves the bonding strength, the shearing strength and the peeling strength of the glue through the synergistic effect of the raw materials, reduces the curing shrinkage rate of the glue, and can better meet the high-strength use requirement of the all-insulation ladder.
By comparing the example 3 with the comparative example 1, the special glue disclosed by the invention obviously improves the bonding strength and the shear strength and also reduces the curing shrinkage rate.
By comparing the example 3 with the comparative example 2, it can be seen that the adhesive strength can be improved by adding the liquid crystal epoxy resin into the raw materials of the glue, and by comparing the examples 5-6, it can be seen that the glue has the best performance effect when the addition amount of the liquid crystal epoxy resin is 6 parts, which is mainly because the liquid crystal epoxy resin is a polymer network with deep molecular cross-linking, a self-reinforced structure can be formed, the performance of the glue is improved along with the increase of the addition amount of the liquid crystal epoxy resin, but when the addition amount of the liquid crystal epoxy resin is too much, the liquid crystal epoxy resin influences the dispersion effect among the raw materials and reduces the performance of the glue.
By comparing the example 3 with the comparative examples 3 to 5, it can be seen that the glue has the best performance when the weight ratio of the silica micropowder to the alumina micropowder is 4:1, because the silica micropowder and the alumina micropowder can reduce the internal stress of the glue and can also effectively prevent crack propagation, and the solid shrinkage is reduced by adding the silica micropowder and the alumina micropowder into the raw materials of the glue, as can be seen from the comparison of the examples 7 to 8.
Claims (9)
1. The utility model provides a glued full-insulated ladder, includes two parallel support montant (1), a plurality of even setting support horizontal pole (2) between two support montant (1), its characterized in that: the connecting pieces (3) are respectively arranged at two ends of the supporting transverse rod (2) and between the two supporting vertical rods (1), each connecting piece (3) comprises a first fixing sleeve (31) used for being sleeved on the outer peripheral surface of each supporting vertical rod (1), a connecting sleeve (35) fixedly arranged on the outer peripheral surface of each first fixing sleeve (31) and used for being sleeved on the outer peripheral surface of each supporting transverse rod (2), a second fixing sleeve (36) used for being sleeved on the outer peripheral surface of each supporting transverse rod (2), an inserting block (38) fixedly arranged at one end of each second fixing sleeve (36) in an extending mode, and a positioning glue injection through hole (381) formed in each inserting block (38), each connecting sleeve (35) is perpendicular to each first fixing sleeve (31), an inserting groove (351) matched with each inserting block (38) is formed in one end, far away from each first fixing sleeve (31), of each connecting sleeve (35), a circle of accommodating grooves (311) used for accommodating glue is formed in the inner side wall of, the two ends of the accommodating groove (311) do not penetrate through the side wall of the first fixing sleeve (31), and a glue injection through hole (313) communicated with the accommodating groove (311) is formed in the peripheral surface of the first fixing sleeve (31).
2. The glued type all-insulated ladder according to claim 1, characterized in that: the outer peripheral face at first fixed sleeve (31) both ends has set firmly first beaded finish (33) respectively, first beaded finish (33) outer peripheral face is provided with first backup pad (331) in being close to injecting glue through-hole (313) one end, and the other end is provided with second backup pad (332), first backup pad (331), second backup pad (332) keep away from first beaded finish (33) one end and are the plane.
3. The glued type all-insulated ladder according to claim 2, characterized in that: the outer peripheral surface of the first fixing sleeve (31) is provided with a third supporting plate (34) at one end far away from the glue injection through hole (313), and one end, far away from the first fixing sleeve (31), of the third supporting plate (34) is a plane.
4. The glued type all-insulated ladder according to claim 1, characterized in that: and a first connecting ring (32) is arranged on the peripheral surface of the first fixing sleeve (31) at the position of the glue injection through hole (313).
5. The glued type all-insulated ladder according to claim 1, characterized in that: the end faces of the two ends of the insertion block (38) along the circumferential direction of the second fixing sleeve (36) are provided with inclined planes.
6. The glued type all-insulated ladder according to claim 5, characterized in that: the number of the insertion blocks (38) is two, and the two insertion blocks (38) are symmetrically arranged.
7. The glued type all-insulated ladder according to claim 1, characterized in that: and a second connecting ring (39) is arranged on the peripheral surface of the inserting block (38) at the position of the positioning glue injection through hole (381).
8. Glue special for the glued type all-insulated ladder according to any one of claims 1 to 7, characterized in that: the raw materials comprise, by weight, 55-65 parts of novolac epoxy resin, 5-7 parts of liquid crystal epoxy resin, 6.5-7.5 parts of 4, 4' -diaminodiphenyl sulfone, 7.5-8.5 parts of tert-butyl phenol glycidyl ether, 9-15 parts of superfine silicon dioxide, 1-5 parts of superfine aluminum oxide, 4-10 parts of aluminum borate whisker and 4.5-6 parts of silane coupling agent.
9. The glue special for the glued type all-insulated ladder according to claim 8, characterized in that: the raw materials comprise, by weight, 60 parts of novolac epoxy resin, 6 parts of liquid crystal epoxy resin, 7 parts of 4, 4' -diaminodiphenyl sulfone, 8 parts of tert-butylphenol glycidyl ether, 12 parts of superfine silicon dioxide, 3 parts of superfine aluminum oxide, 6 parts of aluminum borate whisker and 5 parts of silane coupling agent.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2622879A (en) * | 2022-09-30 | 2024-04-03 | Moonraker Innovation Ltd | Modular ladder |
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| CN110939378B (en) | 2021-10-22 |
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