Sample preparation combined device for measuring setting time of admixture

Abstract

A sample preparation combined device for measuring admixture setting time comprises a mounting frame, the upper end of the center of the mounting frame is connected with a screening hopper, and the lower end of the center of the mounting frame is detachably connected with a metal cylinder; sliding blocks are arranged at the left and right ends of the mounting frame, are arranged on the bracket in a sliding manner and are driven to vibrate up and down through left and right cam mechanisms; a blanking channel is arranged at the lower end of the screening hopper, opening and closing valves are arranged above and below the blanking channel, and the size of the blanking channel between the opening and closing valves is matched with the size of the metal cylinder. According to the sample preparation combined device for measuring the setting time of the admixture, disclosed by the utility model, the sample preparation is more convenient.

Description

Technical Field

[0001] The utility model relates to concrete testing equipment, in particular to a combined device for preparing samples for measuring the setting time of admixtures. Background Art

[0002] When measuring the setting time according to the national standard GB8076-2008 "Concrete Admixtures", it is required to screen out the mortar from the concrete mixture with a 5mm (round hole sieve) vibrating sieve, mix it evenly, and then fill it into a rigid and water-impermeable metal cylinder with an inner diameter of 160mm at the upper end, an inner diameter of 150mm at the lower end, and a net height of 150mm. The surface of the sample is slightly lower than the cylinder mouth by about 10mm, and it is vibrated solid with a vibrating table for about 3s - 5s, and then placed in an environment of (20 ± 2) °C with the container covered.

[0003] The patent "A combined device for preparing samples for measuring the setting time of admixtures" with the application number "202222779320.4" is a patent previously applied by our company. The slurry discharging bucket is divided into two detachable parts and connected to the vibrating table. In this way, not only can the mortar be screened out, but also the metal cylinder filled with mortar can be placed on the vibrating table for vibration. However, this device requires three processes: screening the slurry - filling the slurry into the metal cylinder - vibrating the metal cylinder. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a combined device for preparing samples for measuring the setting time of admixtures, which can facilitate the directly entering of the well-screened mortar into the metal cylinder and complete the vibration compaction at the same time, further simplifying the procedure.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is:

[0006] A combined device for preparing samples for measuring the setting time of admixtures, comprising a mounting frame. The upper end of the center of the mounting frame is connected to a screening hopper, and the lower end is detachably connected to a metal cylinder. Sliders are arranged at the left and right ends of the mounting frame, and the sliders are slidably arranged on the support and driven to vibrate up and down by the left and right cam mechanisms. A blanking channel is arranged at the lower end of the screening hopper, and opening and closing valves are arranged above and below the blanking channel. The volume of the blanking channel between the opening and closing valves matches the volume of the metal cylinder.

[0007] A flange is arranged at the bottom end of the blanking channel, and multiple groups of countersunk holes are circumferentially and uniformly distributed on the flange. The upper part of the countersunk hole is a round hole, and the lower part is a slotted hole. Corresponding to this, a plurality of slotted holes matching the countersunk holes of the flange are circumferentially arranged on the mounting frame, and the connecting components pass through the mounting frame and the flange and are magnetically adsorbed and locked.

[0008] The metal cylinder is fixed with ear plates on the left and right, and the ear plates are provided with slotted holes. The connecting components pass through the ear plates, the mounting frame, and the flange and are magnetically adsorbed and locked.

[0009] The connecting component includes a one-piece block at the upper end, and the one-piece block matches the size of the one-piece hole; the lower end of the one-piece block is connected to the guide rod, and the lower end of the guide rod is connected to the end head.

[0010] The slider is slidably arranged in the chute of the bracket and its upper end is connected to the compression spring.

[0011] The present utility model provides a combined device for sample preparation for measuring the setting time of admixtures, having the following technical effects:

[0012] 1). The metal cylinder is detachably installed at the bottom of the device, and the three steps of screening the mortar - falling into the metal cylinder - vibrating the mortar in the metal cylinder can be realized, further improving the efficiency. Only the metal cylinder needs to be disassembled later, and there is no need to disassemble the upper structure.

[0013] 2). A blanking channel with two opening and closing valves is arranged at the lower end of the screening hopper. After screening, by sequentially pulling out the opening and closing valves, the mortar can fall into the metal cylinder according to a predetermined volume without adjustment.

[0014] 3). The connecting component is detachably connected to the screening hopper and the metal cylinder, which is convenient for disassembling and assembling the metal cylinder in the early stage and disassembling the screening hopper for cleaning in the later stage, which is simple and convenient. Description of the Drawings

[0015] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0016] Figure 1 It is a cross-sectional view of the present utility model.

[0017] Figure 2 It is a schematic diagram of the upper structure of the present utility model.

[0018] Figure 3 It is Figure 1 A partial enlarged schematic view of part A in

[0019] Figure 4 It is a partial enlarged schematic view of the fixed block in the present utility model.

[0020] Figure 5 It is a schematic diagram of the structure of the connecting component in the present utility model.

[0021] Figure 6 It is a schematic diagram of the connection between the flange and the connecting component in the present utility model.

[0022] Figure 7 It is a schematic diagram of the upper connection between the mounting frame and the metal cylinder in the present utility model.

[0023] Figure 8 It is a schematic diagram of the lower connection between the mounting frame and the metal cylinder in the present utility model.

[0024] In the figure: screening hopper 1, screen 2, blanking channel 3, opening and closing valve 4, metal cylinder 5, flange 6, counterbore 7, round hole 7.1, slot hole 7.2, support 8, sliding groove 9, slider 10, compression spring 11, eccentric cam 12, motor 13, mounting bracket 14, ear plate 15, connecting component 16, one-piece block 16.1, guide rod 16.2, end head 16.3, magnet 17, fixed block 18. Detailed implementation manner

[0025] As Figure 1-2 shown, a combined device for preparing samples for measuring the setting time of admixtures includes a screening hopper 1, a screen 2 is arranged in the screening hopper 1, a blanking channel 3 is arranged at the lower end of the screening hopper 1, opening and closing valves 4 are arranged above and below the blanking channel 3, and the volume of the blanking channel 3 between the upper and lower opening and closing valves 4 is slightly smaller than the volume of the metal cylinder 5. A flange 6 is provided at the bottom of the blanking channel 3, and four counterbores 7 are circumferentially arranged on the flange 6. The upper part of the counterbore 7 is a round hole 7.1, and the lower part is a slot hole 7.2. Supports 8 are fixed on the left and right sides of the screening hopper 1, each support 8 is provided with a sliding groove 9, a slider 10 is slidably arranged in the sliding groove 9, the upper end of the slider 10 is connected to a compression spring 11, the lower end of the slider 10 contacts an eccentric cam 12, and the eccentric cam 12 is driven to rotate by a motor 13. The other ends of the two sliders 10 are both connected to a mounting bracket 14, a through hole is formed in the center of the mounting bracket 14, and the lower end of the metal cylinder 5 passes through the through hole of the mounting bracket 14 and extends into the blanking channel 3. At the position corresponding to the counterbore 7 on the mounting bracket 14, slot holes 7.2 of the same size are also provided opposite, a total of 4 groups, and they are evenly distributed circumferentially.

[0026] Corresponding ear plates 15 are welded on both sides of the metal cylinder 5, and slot holes 7.2 of the same size are provided on the two ear plates 15.

[0027] As Figure 5 shown, four connecting components 16 are processed, and the four connecting components 16 have the same structure. The upper end of the connecting component 16 is a one-piece block 16.1, and the one-piece block 16.1 is matched with the slot hole 7.2 and can pass through the slot hole 7.2. The lower end of the one-piece block 16.1 is connected to a guide rod 16.2, and the lower end of the guide rod 16.2 is connected to an end head 16.3.

[0028] As Figure 7-8 shown, two connecting components 16 respectively pass through the slot holes 7.2 on the two ear plates 15 of the metal cylinder 5, the slot holes 7.2 of the mounting bracket 14 and the slot holes 7.2 on the flange 6. Rotate 90 degrees, the one-piece block 16.1 is perpendicular to the slot hole 7.2, the lower end face of the one-piece block 16.1 of the connecting component 16 is adsorbed and fixed to the magnet 17 on the upper end face of the slot hole 7.2 of the flange 6, and the upper end face of the end head 16.3 of the connecting component 16 is attached to the lower end face of the metal cylinder 5. Thus, the limit fixation of the metal cylinder 5 is realized.

[0029] The other two connecting components 16 respectively pass through the slotted holes 7.2 of the mounting bracket 14 and the slotted holes 7.2 on the flange 6. After rotating 90 degrees, they are magnetically adsorbed and locked. The lower end face of the slotted block 16.1 of the connecting component 16 is adsorbed and fixed to the magnet 17 on the upper end face of the slotted hole 7.2 of the flange 6, and the upper end face of the end head 16.3 of the connecting component 16 is in contact with the lower end face of the fixed block 18 on the mounting bracket 14.

[0030] The two opening and closing valves 4 here can be simple pull-out plates, and the upper and lower end faces of the pull-out plates are magnetically adsorbed and fixed to the horizontal sockets on the blanking channel 3. When it needs to be opened, it can be directly pulled out with force; when it needs to be closed, the opening and closing valve 4 can be inserted, and the opening and closing valve 4 is magnetically adsorbed and fixed to the socket.

[0031] Working principle and process:

[0032] 1). Pour the prepared concrete sample directly onto the sieve mesh 2, start the motor 13, and the eccentric cams 12 on both sides rotate synchronously in the same direction, so that the mounting bracket 14 shakes up and down, realizing the screening of the screening hopper 1, and the mortar enters below the sieve mesh 2 and above the first opening and closing valve 4.

[0033] 2). Open the upper opening and closing valve 4, and the mortar falls onto the second opening and closing valve 4 at the lower end, and the height of the upper end of the mortar exceeds the first opening and closing valve 4. Insert the first opening and closing valve 4, and the amount of mortar between the two opening and closing valves 4 matches the volume of the metal cylinder 5.

[0034] 3). Pull out the second opening and closing valve 4 at the lower end. At the same time, start the motor 13, and the mortar falls into the metal cylinder 5 and is vibrated and compacted. Then rotate the connecting components 16 on the two ear plates 15 by 90 degrees, and remove the metal cylinder 5, so that the sample preparation for measuring the setting time of the admixture is completed.

Claims

1. A combined device for sample preparation of setting time determination of admixtures, characterized in that: It includes a mounting frame (14). The upper end of the center of the mounting frame (14) is connected to the screening hopper (1), and the lower end is detachably connected to the metal cylinder (5). Sliders (10) are arranged at the left and right ends of the mounting frame (14). The sliders (10) are slidably arranged on the support (8) and are driven to vibrate up and down by the left and right cam mechanisms. A blanking channel (3) is arranged at the lower end of the screening hopper (1). Opening and closing valves (4) are arranged above and below the blanking channel (3). The volume of the blanking channel (3) between the opening and closing valves (4) matches the volume of the metal cylinder (5).

2. The combined device for sample preparation for measuring the setting time of admixtures according to claim 1, characterized in that: A flange (6) is arranged at the bottom end of the blanking channel (3). A plurality of groups of countersunk holes (7) are circumferentially and evenly distributed on the flange (6). The upper part of the countersunk hole (7) is a round hole (7.1), and the lower part is a slotted hole (7.2). Corresponding slotted holes (7.2) matching the countersunk holes (7) of the flange (6) are circumferentially arranged on the mounting frame (14). The connecting component (16) passes through the mounting frame (14) and the flange (6) and is magnetically adsorbed and locked.

3. The combined device for sample preparation for measuring the setting time of an admixture according to claim 2, characterized in that: Lug plates (15) are fixed on the left and right of the metal cylinder (5). The lug plates (15) are provided with slotted holes (7.2). The connecting component (16) passes through the lug plates (15), the mounting frame (14), and the flange (6) and is magnetically adsorbed and locked.

4. The combined device for sample preparation for measuring the setting time of admixtures according to claim 3, characterized in that: The connecting component (16) includes a slotted block (16.1) at the upper end. The slotted block (16.1) matches the size of the slotted hole (7.2). The lower end of the slotted block (16.1) is connected to a guide rod (16.2), and the lower end of the guide rod (16.2) is connected to a head part (16.3).

5. The combined device for sample preparation for determining the setting time of an admixture according to claim 1, wherein: The slider (10) is slidably arranged in the chute (9) of the support (8) and is connected to a compression spring (11) at the upper end.

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