Automatic molding device and molding method for concrete test block

Abstract

The application discloses a kind of concrete test block automatic forming device and forming method, including workbench, spiral conveyor is arranged on workbench, metering device, test mould device, conveying device, insert tamping mechanism, vibrating mechanism, trowelling mechanism and control system;Insert tamping mechanism in insert tamping rod not only can reciprocate along the direction of travel of conveying device, can reciprocate along the width direction of conveying device, and then realize the insert tamping operation of different positions in test mould box by the up-down movement of insert tamping telescopic device;Simultaneously provided with transition connecting device, without manual intervention, can guarantee its operation continuity;In addition, test mould box base is provided with electromagnetic chuck, effectively improve the operation quality when insert tamping, jolt and trowelling operation;Generally, the application degree of automation is high, not only can reduce material waste, can greatly reduce the working intensity of worker, improve work efficiency, can significantly improve test block forming quality.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of concrete manufacturing, and particularly relates to an automatic molding device and method for concrete test blocks. BACKGROUND

[0002] In the production process of commercial concrete, a concrete test block needs to be reserved for each batch of commercial concrete, so that the quality parameters of the corresponding batch of concrete can be obtained through performance testing of the concrete test block. In the prior art, when the concrete test block is made, the concrete slurry poured into the test mold is usually put in excess, which causes waste of the concrete slurry. Meanwhile, due to the large number of different types of concrete of different grades, and the small number of concrete test blocks made in each batch, the automatic molding degree in the test block making process is low, and the test block is usually made by hand. The concrete slurry after mixing is poured into the test mold by hand, and then the test block is molded by manual tamping or by inserting a vibrating rod. This not only has low work efficiency and high work intensity, but also easily causes uneven quality of the test block due to the difference in technical level of workers, such as insufficient tamping, too short or too long tamping time, etc., which affects the test results and causes potential risks to the construction project. SUMMARY

[0003] The main purpose of the present application is to provide an automatic molding device and method for concrete test blocks, which has high automation degree, reduces material waste and labor work intensity, and significantly improves work efficiency and test piece molding quality.

[0004] To achieve the above purpose, the present application provides an automatic molding device for concrete test blocks, which comprises a workbench, wherein a spiral conveyor, a metering device, a test mold device, a conveying device, a tamping mechanism, a vibrating mechanism, a smoothing mechanism and a control system are arranged on the workbench.

[0005] The discharge port of the spiral conveyor is connected to the metering device.

[0006] The conveying device is arranged below the metering device, and the conveying device is a steel strip plate conveyor.

[0007] The tamping mechanism comprises guide rails and a tamping support arranged on both sides of the conveying device, a lead screw driving device, a tamping telescopic device and a tamping rod.

[0008] The lead screw driving device is arranged above the conveying device and connected to the tamping support, the tamping telescopic device is sleeved on the lead screw driving device, and the telescopic end of the tamping telescopic device is connected to the tamping rod.

[0009] A transition connection device is arranged between the vibrating mechanism and the conveying device, and the transition connection device is rotationally connected to the conveying device.

[0010] The leveling mechanism is arranged above the vibrating mechanism;

[0011] The mold testing device comprises a mold testing box and a mold testing box base, and the mold testing box base is internally provided with an electromagnetic chuck;

[0012] The control system is connected with the screw conveyor, the metering device, the conveying device, the inserting and tamping mechanism, the vibrating mechanism, the leveling mechanism and the mold testing device.

[0013] The metering device comprises a metering support, a metering hopper, a weighing sensor arranged between the metering support and the metering hopper, and an electric valve arranged at the discharge end of the metering hopper, and the metering support is fixedly connected with the workbench.

[0014] The inserting and tamping support is provided with a roller at the bottom, and the roller is connected with a support driving motor; the screw rod driving device comprises a light rod, a screw rod and a screw rod motor for driving the screw rod to rotate, and the light rod and the screw rod are both connected with the inserting and tamping support.

[0015] The transition connecting device comprises a supporting rod, a sliding plate and a compression spring, one end of the supporting rod is movably connected with the conveying device, the other end of the supporting rod is connected with the sliding plate, and the compression spring is connected with the sliding plate and the conveying device respectively, and the sliding plate is provided with a sliding groove.

[0016] The vibrating mechanism comprises a groove type vibrating base, a vibrating platform and at least one vibrating compression spring, both ends of the vibrating compression spring are fixedly connected with the groove type vibrating base and the vibrating platform respectively, the groove type vibrating base is fixedly connected with the workbench, the bottom of the vibrating platform is fixedly connected with a vibrating motor, and the upper part of the vibrating platform is provided with a baffle away from the conveying device.

[0017] The leveling mechanism comprises a leveling support, a leveling telescopic device, a leveling motor and a leveling disc, the telescopic end of the leveling telescopic device is fixedly connected with the leveling motor, the other end of the leveling telescopic device is fixedly connected with the leveling support, the leveling support is fixedly connected with the workbench, and the output end of the leveling motor is fixedly connected with the leveling disc.

[0018] The application also provides a molding method based on the automatic molding device for concrete test blocks.

[0019] S1, a layer of mineral oil is applied in the mold testing box, and the mold testing box is clamped on the mold testing box base, and then placed on the conveying device below the metering device; the stirred concrete slurry is loaded into the screw conveyor.

[0020] S2, the control system controls the test mold box base to generate magnetic force, starts the screw conveyor, and transports the concrete slurry into the metering device. When the total weight of the concrete slurry required for forming a single concrete test block reaches 50%, the screw conveyor stops. The metered concrete slurry is unloaded into the test mold box.

[0021] S3, the control system controls the conveying device to run forward, and the conveying device stops when the test mold device is moved below the inserting and tamping mechanism.

[0022] S4, the control system controls the inserting and tamping mechanism to start, and the concrete slurry in the test mold box is tamped for the first time. The inserting and tamping mechanism is inserted and tamped 12-25 times from the periphery to the center of the test mold box in the spiral direction, and the inserting rod reaches the bottom of the test mold box but does not touch the bottom plate of the test mold box each time. After the first tamping is completed, the inserting and tamping mechanism is controlled to run to the initial position and then stop.

[0023] S5, the control system controls the conveying device to run reversely, and the conveying device stops when the test mold device is moved below the metering device. The screw conveyor is started to transport the concrete slurry into the metering device. When the total weight of the concrete slurry required for forming a single concrete test block reaches 50%, the screw conveyor stops. The metered concrete slurry is unloaded into the test mold box. Step S3 is repeated.

[0024] S6, the control system controls the inserting and tamping mechanism to start, and the concrete slurry in the test mold box is tamped for the second time. The inserting and tamping mechanism is inserted and tamped 12-25 times from the periphery to the center of the test mold box in the spiral direction, and the inserting rod penetrates the upper concrete slurry and is inserted into the lower concrete slurry at a position of 20-30 mm each time. After the second tamping is completed, the inserting and tamping mechanism is controlled to run to the initial position and then stop.

[0025] S7, the control system controls the test mold box base to eliminate the magnetic force, and the conveying device is controlled to run forward. The test mold device is pushed onto the transition connection device and slides to the vibrating mechanism, and then the conveying device stops. Steps S1-S7 are repeated.

[0026] S8, the control system controls the test mold box base to generate the magnetic force, and controls the vibrating mechanism to compact the concrete slurry in the test mold device. When the set vibration compaction time is reached, the vibrating mechanism stops. The smoothing mechanism is started to smooth the concrete slurry in the test mold box, and then the smoothing mechanism is controlled to move to the initial position and then stop. The test mold box base is controlled to eliminate the magnetic force.

[0027] S9, the test mold device is taken away from the vibrating mechanism, the test mold box is separated from the test mold box base, and then the test mold box containing the formed concrete slurry is sent into the curing room for curing.

[0028] Further, the vibration compaction time in step S8 is 10-30 s.

[0029] The present application has the following beneficial effects:

[0030] 1. The metering device can accurately measure the concrete slurry required for making test blocks, reducing material waste;

[0031] 2. The inserting and tamping rod in the inserting and tamping mechanism not only reciprocates along the conveying device in the conveying direction through the inserting and tamping support, but also reciprocates along the conveying device in the width direction through the screw driving device, and further moves up and down through the inserting and tamping telescopic device, so that the inserting and tamping trajectory is a spiral line from the periphery to the center of the test mold box, the concrete slurry at different positions in the test mold box is inserted and tamped, ensuring that each inserting and tamping operation is in place and uniform, thereby effectively improving the test block forming quality;

[0032] 3. The test mold box base is provided with an electromagnetic chuck, and the control system can control the generation and elimination of magnetic force to ensure that the test mold device does not move relatively during inserting and tamping, vibrating and tamping, and smoothing, thereby improving the operation quality during inserting and tamping, vibrating and tamping, and smoothing, and further improving the test block forming quality;

[0033] 4. The transition connection device can automatically transfer the test mold device from the conveying device to the vibrating mechanism, and further automatically restore to the original state, without manual intervention, thereby ensuring the continuity of the operation;

[0034] 5. The whole forming device adopts modular design, has small floor area and high automation degree, can automatically complete the test block forming according to the preset parameters, the forming method is scientific and reasonable, can not only replace manual operation, greatly reduce the working strength of workers and improve the working efficiency, but also avoid the uneven test block quality caused by inserting and tamping not in place, vibrating compacting for too short or too long time, etc., and can significantly improve the test block forming quality. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a structural schematic view of the test block automatic forming device in the present application;

[0036] Figure 2 is a structural schematic view of the inserting and tamping mechanism in the present application;

[0037] Figure 3 is a structural schematic view of the transition connection device in the present application;

[0038] Figure 4 is a schematic view of A-A in the present application; Figure 3

[0039] Figure 5 is a flow chart of the test block automatic forming method in the present application;

[0040] ​In the figure: 1, workbench; 2, screw conveyor; 3, troweling mechanism; 31, troweling support; 32, troweling telescopic device; 33, troweling motor; 34, troweling disc; 4, vibrating mechanism; 41, groove type vibrating base; 42, vibrating platform; 43, vibrating compression spring; 44, vibrating motor; 45, baffle, 5, conveying device; 6, inserting and tamping mechanism; 61, guide rail; 62, inserting and tamping support; 621, roller; 622, support driving motor; 63, screw rod driving device; 631, light pole; 632, screw rod; 633, screw rod motor; 64, inserting and tamping telescopic device; 65, inserting and tamping rod; 7, control system; 8, transition connecting device; 81, support rod; 82, sliding plate; 821, sliding groove; 83, compression spring; 9, test mold device; 91, test mold box; 92, test mold box base; 10, metering device; 101, metering support; 102, metering hopper; 103, weighing sensor; 104, electric valve. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0042] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units need not be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0043] In the present application, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0044] Moreover, the above-mentioned partial terms can be used to represent other meanings in addition to the orientation or positional relationship, for example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0045] In addition, the term "a plurality of" means two and more than two.

[0046] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict, and the present application will be described in detail below with reference to the drawings and in combination with the embodiments. Specific embodiments:

[0048] The specific embodiments of the present application will be described in detail below in combination with the drawings and preferred embodiments.

[0049] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, an automatic forming device for concrete test blocks comprises a workbench 1, the workbench 1 is provided with a screw conveyor 2, a metering device 10, a test mold device 9, a conveying device 5, a tamping mechanism 6, a vibrating mechanism 4, a troweling mechanism 3 and a control system 7; the discharge port of the screw conveyor 2 is connected to the metering device 10; the conveying device 5 is arranged below the metering device 10, and the conveying device 5 is a steel slat plate conveyor; the tamping mechanism 6 comprises guide rails 61 and tamping supports 62 arranged on both sides of the conveying device 5, a lead screw driving device 63, a tamping telescopic device 64 and a tamping rod 65, the lead screw driving device 63 is arranged above the conveying device 5 and connected to the tamping supports 62, the tamping telescopic device 64 is sleeved on the lead screw driving device 63, and the telescopic end of the tamping telescopic device 64 is fixedly connected to the tamping rod 65 through bolts; a transition connection device 8 is arranged between the vibrating mechanism 4 and the conveying device 5, and the transition connection device 8 is rotationally connected to the conveying device 5; the troweling mechanism 3 is arranged above the vibrating mechanism 4; the test mold device 9 comprises a test mold box 91 and a test mold box base 92, the test mold box base 92 is provided with a clamping groove, the test mold box 91 is clamped on the test mold box base 92, and the test mold box base 92 is provided with an electromagnetic chuck, which generates a magnetic force and eliminates the magnetic force, so that the test mold device 9 does not move relatively during tamping, vibrating and troweling operations, thereby improving the operation quality during tamping, vibrating and troweling operations, and further improving the test block forming quality; the control system 7 is connected to the screw conveyor 2, the metering device 10, the conveying device 5, the tamping mechanism 6, the vibrating mechanism 4, the troweling mechanism 3 and the test mold device 9.

[0050] The metering device 10 comprises a metering support 101, a metering hopper 102, the lower end of the metering support 101 is bolted or welded on the workbench 1, a weighing sensor 103 is arranged between the upper part of the metering support 101 and the metering hopper 102, the metering hopper 102 is located below the discharge port of the screw conveyor 2, the concrete slurry conveyed by the screw conveyor 2 enters the metering hopper 102 from the feeding end of the metering hopper 102 through the discharge port, the weighing sensor 103 feeds the measured weight signal to the control system 7, the discharging end of the metering hopper 102 is provided with an electric valve 104, the opening and closing of the electric valve 104 is controlled by the control system 7, the metering device 10 can accurately meter the concrete slurry required for making test blocks, and reduce material waste.

[0051] The bottom of the two-sided inserting and tamping support 62 is respectively provided with a roller 621, the roller groove on the roller 621 is matched with the track 61, the two-sided inserting and tamping support 62 can be respectively provided with a support driving motor 622, or the support driving motor 622 can be arranged on one side of the inserting and tamping support 62, and the other side of the inserting and tamping support 62 is not provided with the support driving motor 622, the control system 7 drives the forward and reverse rotation of the roller 621 through the control of the support driving motor 622, so that the inserting and tamping support 62 can reciprocate along the track 61; the screw rod driving device 63 comprises a light rod 631, a screw rod 632 and a screw rod motor 633 for driving the rotation of the screw rod 632, the light rod 631 and the screw rod 632 are both rotationally connected with the two-sided inserting and tamping support 62, the screw rod motor 633 is fixed on the outer side of one side of the inserting and tamping support 62 through bolts, and the output end of the screw rod motor 633 is connected with one end of the screw rod 632 through a locking screw; the inserting and tamping telescopic device 64 adopts an electric push rod, the inserting and tamping telescopic device 64 is respectively provided with a light hole and a screw hole, the light hole and the screw hole are respectively matched with the light rod 631 and the screw rod 632, the control system 7 drives the forward and reverse rotation of the screw rod 632 through the control of the screw rod motor 633, so as to drive the inserting and tamping telescopic device 64 to reciprocate along the screw rod 632, and the light rod 631 ensures that the inserting and tamping telescopic device 64 will not be deflected when reciprocating along the screw rod 632, so as to ensure that the control system 7 controls the extension and retraction of the telescopic end of the inserting and tamping telescopic device 64 in the vertical direction, the inserting and tamping rod 65 in the inserting and tamping mechanism 6 not only can reciprocate along the conveying device 5 in the conveying direction on the track 61 through the inserting and tamping support 62, but also can reciprocate along the conveying device 5 in the width direction through the screw rod driving device 63, and then move up and down through the inserting and tamping telescopic device 64, so that the inserting and tamping trajectory is a spiral line from the periphery to the center of the test mold box 91, not only the inserting and tamping operation on the concrete slurry at different positions in the test mold box 91 is realized, but also it is ensured that each inserting and tamping operation can be inserted in place, and the test block forming quality is effectively improved.

[0052] The transition connecting device 8 comprises a support rod 81, a sliding plate 82 and a compression spring 83, the bearing seat on the side close to the vibration mechanism 4 of the conveying device 5 is provided with a protruding rotating shaft, one end of the support rod 81 is sleeved on the rotating shaft, the other end of the support rod 81 is connected with the sliding plate through bolts, one end of the compression spring 83 is connected with the lower bottom surface of the sliding plate 82, the other end of the compression spring 83 is connected with the bearing seat of the conveying device 5, when the conveying device 5 pushes the test mold device 9 to the sliding plate 82 of the transition connecting device 8, under the action of the gravity of the test mold device 9, the end of the sliding plate 82 away from the conveying device 5 rotates downward to form an inclined surface, the test mold device 9 slides to the vibration mechanism 4 through the inclined surface formed by the sliding plate 82, the sliding plate 82 is provided with a sliding groove 821, which ensures that the test mold device 9 will not slide off from both sides of the sliding plate 82 when sliding to the vibration mechanism 4 through the inclined surface formed by the sliding plate 82, after the test mold device 9 slides to the vibration mechanism 4, the compression spring 83 drives the sliding plate 82 to automatically restore to the initial position, without manual intervention, the continuity of the operation can be ensured.

[0053] The vibration mechanism 4 comprises a groove type vibration base 41, a vibration platform 42 and at least one vibration compression spring 43, the groove type vibration base 41 is fixedly connected with the workbench 1 through bolts, the lower end of the vibration compression spring 43 is connected with the groove type vibration base 41, the upper end of the vibration compression spring 43 is connected with the vibration platform 42, the bottom of the vibration platform 42 is fixedly connected with a vibration motor 44 through bolts, the control system 7 controls the vibration motor 44 to operate to drive the vibration platform 42 to vibrate, the side away from the conveying device 5 of the vibration platform 42 is provided with a baffle 45 through bolts or welding, which ensures that the test mold device 9 will not slide off from the vibration platform 42 when sliding to the vibration mechanism 4 through the inclined surface formed by the sliding plate 82.

[0054] The smoothing mechanism 3 comprises a smoothing support 31, a smoothing telescopic device 32, a smoothing motor 33 and a smoothing disc 34, the lower end of the smoothing support 31 is fixedly connected with the workbench 1 through bolts, the upper end of the smoothing support 31 is fixedly connected with the smoothing telescopic device 32 through bolts, the telescopic end of the smoothing telescopic device 32 is fixedly connected with the smoothing motor 33 through bolts, the output end of the smoothing motor 33 is fixedly connected with the smoothing disc 34 through bolts, the control system 7 drives the smoothing disc 34 to move up and down by controlling the telescopic movement of the smoothing telescopic device 32, at the same time, the control system 7 drives the smoothing disc 34 to rotate for smoothing operation by controlling the rotation of the smoothing motor 33, wherein the diameter of the smoothing disc 34 is greater than the maximum size of the top of the test mold box 91, so that the smoothing disc 34 only needs to move up and down to complete the smoothing operation well; when the smoothing mechanism 3 moves downward to perform the smoothing operation on the test mold device 9, the groove wall top of the groove type vibration base 41 in the vibration mechanism 4 can prevent the vibration platform 42 from moving downward, so as to ensure that the test mold device 9 can be effectively smoothed when the smoothing mechanism 3 performs the smoothing operation, and the smoothing effect is improved.

[0055] In addition, the test mold box base 92 in the test mold device 9 is provided with a battery and a remote control switch, the battery can provide power for the electromagnetic suction cup, and the control system 7 can control the opening and closing of the remote control switch, so as to realize wireless remote control of the test mold box base 92 to generate magnetic force and eliminate magnetic force.

[0056] As shown in Figure 5 The present application also provides a molding method based on the above-mentioned automatic molding device for concrete test blocks, which comprises the following steps:

[0057] S1, a layer of mineral oil is applied in the test mold box 91 and clamped on the test mold box base 92, the clamped test mold device 9 is placed on the conveying device 5 below the metering device 10, and the stirred concrete slurry is loaded into the screw conveyor 2;

[0058] S2, the control system 7 controls the test mold box base 92 to generate magnetic force, so that the test mold device 9 is adsorbed on the conveying device 5 and cannot move relatively; the control system 7 starts the screw conveyor 2 to convey the concrete slurry into the metering device 10, when the total weight of the concrete slurry required for the molding of a single concrete test block reaches 50%, the control system 7 controls the screw conveyor 2 to stop rotating, and the control system 7 controls the electric valve 104 in the metering device 10 to open, the metered concrete slurry is unloaded into the test mold box 91, and then the control system 7 controls the electric valve 104 in the metering device 10 to close;

[0059] S3, the control system 7 controls the conveying device 5 to run forward, and when the test mold device 9 is moved to below the inserting and tamping mechanism 6, the control system 7 controls the conveying device 5 to stop running;

[0060] S4, the control system 7 controls the inserting and tamping mechanism 6 to perform the first inserting and tamping on the concrete slurry in the test mold box 91 according to the set program, according to the slump of the concrete slurry for making the concrete test block, the inserting and tamping track is inserted and tamped 12-25 times in the spiral direction from the periphery to the center of the test mold box 91, and the inserting and tamping rod 65 reaches the bottom of the test mold box 91 but does not contact the bottom plate of the test mold box 91 each time; after the first inserting and tamping is completed, the control system 7 controls the inserting and tamping mechanism 6 to run to the initial position and then stop;

[0061] S5, the control system 7 controls the conveying device 5 to run reversely, and when the test mold device 9 is moved to below the metering device 10, the conveying device 5 stops; at the same time, the control system 7 starts the screw conveyor 2 to convey the concrete slurry into the metering device 10, when the total weight of the concrete slurry required for the molding of a single concrete test block reaches 50%, the control system 7 controls the screw conveyor 2 to stop rotating, and the control system 7 controls the electric valve 104 in the metering device 10 to open, the metered concrete slurry is unloaded into the test mold box 91, and then the control system 7 controls the electric valve 104 in the metering device 10 to close; repeat step S3;

[0062] S6, the control system 7 controls the inserting mechanism 6 to insert the concrete slurry in the mold box 91 according to the set program, according to the slump of the concrete slurry for making the concrete test block, the inserting track is inserted 12-25 times in the spiral direction from the periphery to the center of the mold box 91, and the inserting rod 65 is inserted into the lower concrete slurry 20-30 mm after penetrating the upper concrete slurry each time; after the secondary inserting is completed, the control system 7 controls the inserting mechanism 6 to run to the initial position and then stop;

[0063] S7, the control system 7 controls the mold box base 92 to eliminate the magnetic force, controls the conveying device 5 to run forward at the same time, pushes the mold device 9 to the transition connection device 8 and slides to the vibrating mechanism 4, controls the conveying device 5 to stop running; repeat steps S1-S7 to improve work efficiency;

[0064] S8, the control system 7 controls the mold box base 92 to generate a magnetic force; the control system 7 controls the vibrating mechanism 4 to vibrate and compact the concrete slurry in the mold device 9 and then stop; the control system 7 controls the smoothing mechanism to smooth the concrete slurry above the top end of the mold box 91, and then controls the smoothing mechanism 9 to move to the initial position and stop; the control system 7 controls the mold box base 92 to eliminate the magnetic force;

[0065] S9, the mold device 9 is taken away from the vibrating mechanism 4, the mold box 91 is separated from the mold box base 92, and then the mold box 91 containing the formed concrete slurry is sent into the curing room for curing.

[0066] The vibration and compaction time in step S8 is 10-30s, which is determined according to the slump of the concrete slurry for making the concrete test block, so as to avoid the concrete slurry in the test block from being not compacted due to the short vibration and compaction time, affecting the forming quality of the test block, and effectively avoid the concrete slurry in the test block from segregating due to the long vibration and compaction time, affecting the forming quality of the test block.

[0067] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An automatic concrete test block forming apparatus comprising a worktable, characterised in that: The workbench is provided with a spiral conveyor, a metering device, a mold testing device, a conveying device, a tamping mechanism, a vibrating mechanism, a smoothing mechanism and a control system; The discharge port of the spiral conveyor is connected to the metering device; The conveying device is arranged below the metering device, and the conveying device is a steel slat plate conveyor; The tamping mechanism comprises guide rails and a tamping support arranged on both sides of the conveying device, a lead screw driving device, a tamping telescopic device and a tamping rod; The lead screw driving device is arranged above the conveying device and connected to the tamping support, the tamping telescopic device is sleeved on the lead screw driving device, and the telescopic end of the tamping telescopic device is connected to the tamping rod; The vibrating mechanism is provided with a transition linkage device between the vibrating mechanism and the conveying device, and the transition linkage device is rotationally connected to the conveying device; The smoothing mechanism is arranged above the vibrating mechanism; the mold testing device comprises a mold testing box and a mold testing box base, and the mold testing box base is provided with an electromagnetic chuck; The control system is connected to the spiral conveyor, the metering device, the conveying device, the tamping mechanism, the vibrating mechanism, the smoothing mechanism and the mold testing device; The metering device comprises a metering support, a metering hopper, a weighing sensor arranged between the metering support and the metering hopper, and an electric valve arranged at the discharge end of the metering hopper, and the metering support is fixedly connected to the workbench; The tamping support is provided with a roller at the bottom, the roller is connected to a support driving motor, the lead screw driving device comprises a light rod, a lead screw and a lead screw motor for driving the rotation of the lead screw, and the light rod and the lead screw are connected to the tamping support; The transition linkage device comprises a support rod, a sliding plate and a compression spring, one end of the support rod is movably connected to the conveying device, the other end of the support rod is connected to the sliding plate, and the compression spring is connected to the sliding plate and the conveying device, respectively, and the sliding plate is provided with a sliding groove; The vibrating mechanism comprises a groove type vibrating base, a vibrating platform and at least one vibrating compression spring, both ends of the vibrating compression spring are fixedly connected to the groove type vibrating base and the vibrating platform, respectively, the groove type vibrating base is fixedly connected to the workbench, the bottom of the vibrating platform is fixedly connected to a vibrating motor, and the upper part of the vibrating platform is provided with a baffle away from the conveying device; The smoothing mechanism comprises a smoothing support, a smoothing telescopic device, a smoothing motor and a smoothing disc, the telescopic end of the smoothing telescopic device is fixedly connected to the smoothing motor, the other end of the smoothing telescopic device is fixedly connected to the smoothing support, the smoothing support is fixedly connected to the workbench, and the output end of the smoothing motor is fixedly connected to the smoothing disc.

2. The molding method of the automatic concrete test block molding apparatus according to claim 1, characterized by: The method comprises the following steps: S1, a layer of mineral oil is applied in the mold testing box, and the mold testing box is clamped on the mold testing box base, and then placed on the conveying device below the metering device; the stirred concrete slurry is loaded into the spiral conveyor; S2, the control system controls the test mold box base to generate magnetic force, starts the screw conveyor, and transports the concrete slurry into the metering device. When 50% of the total weight of the concrete slurry required for forming a single concrete test block is reached, the screw conveyor stops. The metered concrete slurry is unloaded into the test mold box. S3, the control system controls the conveying device to run forward, and the conveying device stops when the test mold device is moved below the inserting and tamping mechanism. S4, the control system controls the inserting and tamping mechanism to start, and the concrete slurry in the test mold box is tamped for the first time. The inserting and tamping mechanism is inserted and tamped 12-25 times from the periphery to the center of the test mold box in the spiral direction, and the inserting rod reaches the bottom of the test mold box but does not touch the bottom plate of the test mold box each time. After the first tamping is completed, the inserting and tamping mechanism is controlled to run to the initial position and then stop. S5, the control system controls the conveying device to run reversely, and the conveying device stops when the test mold device is moved below the metering device. The screw conveyor is started to transport the concrete slurry into the metering device. When 50% of the total weight of the concrete slurry required for forming a single concrete test block is reached, the screw conveyor stops. The metered concrete slurry is unloaded into the test mold box. Step S3 is repeated. S6, the control system controls the inserting and tamping mechanism to start, and the concrete slurry in the test mold box is tamped for the second time. The inserting and tamping mechanism is inserted and tamped 12-25 times from the periphery to the center of the test mold box in the spiral direction, and the inserting rod penetrates the upper concrete slurry and is inserted into the lower concrete slurry 20-30 mm each time. After the second tamping is completed, the inserting and tamping mechanism is controlled to run to the initial position and then stop. S7, the control system controls the test mold box base to eliminate the magnetic force, and the conveying device is controlled to run forward. The test mold device is pushed onto the transition connection device and slides to the vibrating mechanism, and then the conveying device stops. Steps S1-S7 are repeated. S8, the control system controls the test mold box base to generate magnetic force, and controls the vibrating mechanism to vibrate and compact the concrete slurry in the test mold device. When the set vibration and compaction time is reached, the vibrating mechanism stops. The smoothing mechanism is started to smooth the concrete slurry in the test mold box, and then the smoothing mechanism is controlled to move to the initial position and then stop. The test mold box base eliminates the magnetic force. S9, the test mold device is removed from the vibrating mechanism, the test mold box is separated from the test mold box base, and then the test mold box containing the formed concrete slurry is sent into the curing room for curing.

3. The molding method of the automatic concrete test block molding apparatus according to claim 2, characterized by: The vibration and compaction time in step S8 is 10-30 s.

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