CN218928125U

CN218928125U - Straw fiber composite concrete test block vibration pressurization forming device

Info

Publication number: CN218928125U
Application number: CN202223472671.7U
Authority: CN
Inventors: 张中昊; 邓宏宇; 付强; 李长青
Original assignee: Heilongjiang Zhongke New Materials Co ltd; Northeast Agricultural University
Current assignee: Heilongjiang Zhongke New Materials Co ltd; Northeast Agricultural University
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-04-28
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a vibration and pressurization forming device for a straw fiber composite concrete test block, which has the technical scheme that: including shaking table, reaction frame bottom plate, concrete cube mould die block, concrete cube mould, anchor clamps lower baffle, balancing weight, anchor clamps overhead gage, frame supporting angle steel, reaction frame roof and spring, the reaction frame bottom plate sets up the upper surface of shaking table, concrete cube mould die block sets up the bottom of concrete cube mould, just concrete cube mould die block is placed on the reaction frame bottom plate. The utility model solves the problems of poor workability of straw fiber concrete and difficult compact forming under the condition of no pressurization and vibration, and simultaneously the applied pressure value can be flexibly adjusted to meet the pressure required by the forming of building blocks with different strengths, and in addition, the problems of falling of a balancing weight and failure of vibration and pressurization are avoided by designing a special fixture.

Description

Straw fiber composite concrete test block vibration pressurization forming device

Technical Field

The utility model relates to the field of laboratory preparation of concrete test blocks in building material experiments, in particular to a vibration and pressurization forming device for a straw fiber composite concrete test block.

Background

The plant fiber or other inorganic fiber materials are added into the concrete mixture to improve the heat insulation performance and ductility of the concrete block, and the concrete prepared by the method is called straw fiber composite concrete. However, as the straw absorbs a large amount of water in the stirring process, the workability of the concrete mixture is reduced, the concrete after vibrating is not easy to compact, and the strength is reduced. Similarly, dry hard concrete and roller compacted concrete have the problems of poor workability and difficulty in uniform vibration due to lower water cement ratio. Therefore, in such concrete, it is necessary to apply a certain pressure to the test block during the vibration, and to vibrate the block while applying pressure. There are several ways of pressurizing: firstly, stopping after the vibration table is started for a period of time, manually compacting the concrete mixture by using a heavy hammer, then filling materials again, starting the vibration table again, and repeating the steps until the test block is formed. The method is simple to operate, but the damage to the die and the test block is large due to the fact that the test block is repeatedly subjected to impact load, and the manual operation is high in physical power consumption. And secondly, stacking a heavy object above the concrete test block, and then placing the test block and the heavy object together on a vibration table for vibration. The method has the advantages that the vibration frequency of the vibration table is high, the vibration is severe, the weight is easy to drop in the compaction process if no fixing measure is provided, the table top is crushed, the pressure required to be applied by test blocks with different mixing ratios is different, the adjustment of the weight of the overlapped weight is not flexible enough, and the application range is limited. The hydraulic jack does not display the pressure value, so that the matched pressure sensor and data acquisition instrument are required to read and adjust the pressure value. The method has the problems of large influence of human factors, difficulty in fixing heavy objects, inflexible adjustment of pressure values, high equipment cost and the like, and a more reasonable vibration pressurizing device is required to control the molding quality of the straw fiber composite concrete test block.

Disclosure of Invention

The utility model aims to solve the problems in the background art, and provides a vibration pressurizing forming device for a straw fiber composite concrete test block, which is characterized in that a balancing weight is superposed on a concrete cube mould to achieve the purpose of pressurizing, an iron counter-force frame is designed to solve the problem that the balancing weight is easy to fall in the vibration process, the counter-force frame is connected with the balancing weight through a spring, the balancing weight is fixed above the mould by the thrust generated by the spring, the stability of the balancing weight is maintained in the vibration process and the buffering effect is achieved, the balancing weights with different specifications and weights can be adopted to meet the requirements of most of pressure value adjustment, special fixtures are designed, the balancing weights with different specifications and numbers are connected into a whole in the working process, and the device can be conveniently detached, is flexible in adjustment, does not need to be used in expensive electronic equipment such as a pressure sensor, a data acquisition instrument and the like, is simple in structure, low in cost and easy to realize, and is suitable for popularization in a laboratory to solve the problems mentioned in the background technology.

The technical aim of the utility model is realized by the following technical scheme:

the utility model provides a straw fiber composite concrete test block vibration pressurization forming device, includes shaking table, reaction frame bottom plate, concrete cube mould die block, anchor clamps lower baffle, balancing weight, anchor clamps overhead gage, frame supporting angle steel, reaction frame roof and spring, the reaction frame bottom plate sets up the upper surface of shaking table, concrete cube mould die block sets up the bottom of concrete cube mould, just concrete cube mould die block is placed on the reaction frame bottom plate, the anchor clamps lower baffle sets up the upper limit opening part of concrete cube mould, the balancing weight sets up the upper surface of anchor clamps lower baffle, the anchor clamps overhead gage sets up the top of balancing weight, the anchor clamps overhead gage with pass through two bolt fastening connection between the anchor clamps lower baffle, the frame supporting angle steel is fixed to be set up the upper surface of reaction frame bottom plate, the reaction frame roof is fixed to be set up the top of frame supporting angle steel, the both ends of spring set up respectively the upper surface of anchor clamps overhead gage with between the lower surface of reaction frame.

Preferably, the lower surface of the lower baffle of the clamp is provided with a lower lining plate, the lower lining plate is tightly aligned with the upper opening of the concrete cube mould, the side length of the lower lining plate is 150mm, and the thickness of the lower lining plate is 30mm.

Preferably, nuts are connected to the two ends of the two bolts in a threaded manner.

Preferably, both ends of the bolt are positioned at the inner side of the nut, and the bolt gaskets are sleeved on both ends of the bolt.

Preferably, the balancing weight is arranged as a lead block, and the balancing weight is arranged as a circular structure.

Preferably, the upper surface of the upper baffle plate of the clamp is fixedly provided with a first buffer sheet, and the lower surface of the top plate of the reaction frame is fixedly provided with a second buffer sheet.

Preferably, the first buffer sheet and the second buffer sheet are both provided as buffer steel sheets.

Preferably, the counter-force frame bottom plate and the counter-force frame top plate are both arranged as iron plates, and the frame support angle steel is provided with four groups.

In summary, the utility model has the following advantages:

the utility model solves the problems of poor workability of straw fiber concrete and difficult compact molding under the condition of no pressurization and vibration, and simultaneously the applied pressure value can be flexibly adjusted to meet the pressure required by molding building blocks with different strengths, and in addition, the problems of falling of a balancing weight and failure of vibration and pressurization are avoided by designing a special fixture;

the spring designed by the utility model can maintain the stability of the clamp and the module in the whole vibration process, the thrust of the spring is generated by the inside of the counter-force frame, the vibration table cannot be damaged, the pressurizing strength is high, the application range is wide, and the device has the advantages of simple structure, convenient use, strong practicability and low cost, and is suitable for popularization in laboratories.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Reference numerals: 1. a vibration table; 2. a reaction frame bottom plate; 3. bottom die of concrete cube die; 4. a concrete cube mold; 5. a clamp lower baffle; 6. a lower lining plate; 7. a bolt; 8. a bolt gasket; 9. a nut; 10. balancing weight; 11. a baffle plate is arranged on the clamp; 12. a first buffer sheet; 13. a spring; 14. a second buffer sheet; 15. a reaction frame top plate; 16. the frame supports the angle steel.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1, a vibration pressurization forming device for a straw fiber composite concrete test block comprises a vibrating table 1, a counter-force frame bottom plate 2, a bottom die 3 of a concrete cube mould 4, the concrete cube mould 4, a clamp lower baffle 5, a balancing weight 10, a clamp upper baffle 11, a frame supporting angle steel 16, a counter-force frame top plate 15 and springs 13, wherein the counter-force frame bottom plate 2 is arranged on the upper surface of the vibrating table 1, the bottom die 3 of the concrete cube mould 4 is arranged at the bottom of the concrete cube mould 4, the size of the concrete cube mould 4 is 150mm multiplied by 150mm and is specified by a standard concrete cube compressive strength test, the result obtained by adopting other sizes is avoided from being converted to bring unnecessary trouble, the bottom die 3 of the concrete cube mould 4 is placed on the counter-force frame bottom plate 2, the clamp lower baffle 5 is arranged at the upper opening of the concrete cube mould 4, the balancing weight 10 is arranged on the upper surface of the clamp lower baffle 5, the clamp upper baffle 11 is arranged at the top of the balancing weight 10, the clamp upper baffle 11 and the lower baffle 5 are fixedly connected through two bolts 7, the frame supporting angle steel 16 is fixedly arranged at the bottom plate 16 at the bottom of the concrete cube mould 4, the counter-force frame top plate is fixedly arranged at the top plate 2 and the top plate 15 is arranged at the top of the counter-force frame top plate 15, and the counter-force frame top plate is fixedly arranged at the top plate 15 is respectively.

The lower surface of the fixture lower baffle 5 is provided with a lower lining plate 6, the lower lining plate 6 is tightly aligned with the upper opening of the concrete cube mould 4, the side length of the lower lining plate 6 is 150mm, and the thickness is 30mm.

Referring to fig. 1, in order to fix the screw 7 conveniently, nuts 9 are screwed at both ends of two bolts 7, and bolt gaskets 8 are sleeved at both ends of the bolts 7 on the inner side of the nuts 9 for the stability of connection between the bolts 7 and the nuts 9.

The balancing weight 10 sets up to the lead block, and balancing weight 10 sets up to circular structure, according to circular diameter and thickness's difference, has customized seven kinds of different weight's counter weight lead block, is respectively: (1) diameter 22cm, thickness 4.5cm, weight 20 kg; (2) diameter 20cm, thickness 4.5cm, weight 15 kg; (3) diameter 17cm, thickness 4cm, weight 10 kg; (4) diameter 15cm, thickness 4cm, weight 7.5 kg; (5) diameter 14cm, thickness 3cm, weight 5 kg; (6) diameter 11cm, thickness 2.5cm, weight 2.5 kg; (7) diameter 8cm, thickness 2cm, weight 1.25 kg; the purpose of adjusting the pressure is achieved by adjusting the number of the counterweight lead blocks, if the pressure of 10kpa is required, only 2 lead blocks of 2 kg and 1 lead block of 2.5 kg are needed to be overlapped.

Referring to fig. 1, in order to increase the cushioning effect, the strength of the first cushioning sheet 12 and the second cushioning sheet 14 is increased; the upper surface of anchor clamps upper baffle 11 is fixed and is provided with first buffer sheet 12, and the lower surface of reaction frame roof 15 is fixed and is provided with second buffer sheet 14, and first buffer sheet 12 and second buffer sheet 14 all set up to the buffering steel sheet.

The reaction frame bottom plate 2 and the reaction frame top plate 15 are both provided with iron plates, and the frame support angle steel 16 is provided with four groups.

Referring to fig. 1, the concrete cube mold 4 is different from the mold used in the common concrete cube compression test, and the concrete cube mold bottom mold 3 can be removed, because the plant fiber in the concrete mixture has lighter weight and floats easily in the vibration process, when the vibration is half, the lower baffle 5 of the clamp is required to be removed, another steel concrete cube mold bottom mold 3 with the same size is covered above the opening of the concrete cube mold 4, and then the steel concrete cube mold bottom mold 3 is turned upside down, and the straw fiber composite concrete mixture is vibrated from the other direction, so that double-sided vibration is realized, and the distribution of the materials in the mixture is more uniform;

the two ends of the lower clamp baffle 5 and the upper clamp baffle 11 are connected through two bolts 7, and nuts 9 are connected with bolt gaskets 8, so that the bolts 7 are fixed, and the lower clamp baffle 5 is placed above the concrete cube mould 4 without fixation; by tensioning the two bolts 7, the balancing weight 10 and the clamp form a whole, the problems of noise and the like caused by mutual collision in the vibration pressurization process are avoided, and electronic equipment such as a data acquisition instrument and the like are needed in a pressure sensor and hydraulic equipment control mode, so that the manufacturing cost is high;

one end of the spring 13 is connected with the upper baffle plate 11 of the clamp through the first buffer sheet 12, the other end of the spring 13 is connected with the top plate 15 of the reaction frame through the second buffer sheet 14, and the spring 13, the clamp and the test block die are assembled into a whole during working, so that the assembly and disassembly are convenient during non-working state; it should be noted that, the upper end of the spring 13 is connected with the top plate 15 of the reaction frame, so that the elastic restoring force of the spring 13 acts on the upper baffle plate 11 of the clamp, so that the clamp and the counterweight 10 can be tightly fixed above the mould in the vibration pressurizing process, the problem that the vibration pressurizing fails due to the fact that the clamp and the counterweight 10 drop down to crush the vibrating table 1 in a short time is avoided, meanwhile, the compaction and sinking of the concrete mixture can be accelerated, and the gap between the lower lining plate 6 and the concrete mixture is eliminated.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a straw fiber composite concrete test block vibration pressurization forming device which characterized in that: the device comprises a vibrating table (1), a counter-force frame bottom plate (2), a concrete cube mould bottom plate (3), a concrete cube mould (4), a clamp lower baffle plate (5), a balancing weight (10), a clamp upper baffle plate (11), a frame support angle steel (16), a counter-force frame top plate (15) and springs (13), wherein the counter-force frame bottom plate (2) is arranged on the upper surface of the vibrating table (1), the concrete cube mould bottom plate (3) is arranged at the bottom of the concrete cube mould (4), the concrete cube mould bottom plate (3) is arranged on the counter-force frame bottom plate (2), the clamp lower baffle plate (5) is arranged at the upper edge opening of the concrete cube mould (4), the balancing weight (10) is arranged on the upper surface of the clamp lower baffle plate (5), the clamp upper baffle plate (11) is arranged at the top of the balancing weight (10), the clamp upper baffle plate (11) and the clamp lower baffle plate (5) are tightly connected through two bolts (7), the frame support angle steel (16) is fixedly arranged at the upper side opening of the counter-force frame bottom plate (2), the counter-force frame upper baffle plate (16) is fixedly arranged on the top plate (15), the two ends of the spring (13) are respectively arranged between the upper surface of the clamp upper baffle plate (11) and the lower surface of the counter-force frame top plate (15).

2. The vibration and pressurization forming device for the straw fiber composite concrete test block according to claim 1, wherein the device comprises the following components: the lower surface of anchor clamps lower baffle (5) is provided with down welt (6), down welt (6) with the upper shed of concrete cube mould (4) is closely adjusted and is aligned, just the length of side of welt (6) is 150mm, and thickness is 30mm.

3. The vibration and pressurization forming device for the straw fiber composite concrete test block according to claim 1, wherein the device comprises the following components: two ends of the two bolts (7) are in threaded connection with nuts (9).

4. A device for vibration and compression molding of a straw fiber composite concrete test block according to claim 3, wherein: both ends of the bolt (7) are positioned at the inner side of the nut (9) and are sleeved with bolt gaskets (8).

5. The vibration and pressurization forming device for the straw fiber composite concrete test block according to claim 1, wherein the device comprises the following components: the balancing weight (10) is arranged to be a lead block, and the balancing weight (10) is arranged to be a round structure.

6. The vibration and pressurization forming device for the straw fiber composite concrete test block according to claim 1, wherein the device comprises the following components: the upper surface of the fixture upper baffle plate (11) is fixedly provided with a first buffer sheet (12), and the lower surface of the reaction frame top plate (15) is fixedly provided with a second buffer sheet (14).

7. The vibration and pressurization forming device for the straw fiber composite concrete test block according to claim 6, wherein the device comprises the following components: the first buffer sheet (12) and the second buffer sheet (14) are both arranged as buffer steel sheets.

8. The vibration and pressurization forming device for the straw fiber composite concrete test block according to claim 1, wherein the device comprises the following components: the counter-force frame bottom plate (2) and the counter-force frame top plate (15) are both arranged as iron plates, and the frame support angle steel (16) is provided with four groups.