Modular testing device and method for slump and expansion of cement concrete

Abstract

The invention discloses a modular testing device and method for slump and expansion of cement concrete. The modular testing device comprises an expansion steel plate, a waste hopper, a device support, an operation panel, a slump cone, a discharging assembly used for feeding concrete into the slump cone and an oscillating rod assembly used for oscillating the concrete in the slump cone. The slump cone is placed on the expansion steel plate, the expansion steel plate is located on the waste hopper, a notch is formed in the device support, the expansion steel plate is located on the notch, a pumping device is arranged on the inner wall of the notch, the waste hopper is connected into the pumping device, and the laser sensor is installed on the device support. The laser sensor is arranged in the slump cone, the laser sensor directly faces the side face of the slump cone, a gap is formed between the laser sensor and the side wall of the slump cone, the laser sensor is connected with the operation panel, the device and the method can rapidly complete concrete slump and expansion testing, and operation is simple.

Description

Technical Field

[0001] The invention belongs to the technical field of cement concrete testing devices and relates to a modular testing device and method for the slump and spread of cement concrete. Background Art

[0002] The slump of cement concrete is an important indicator for measuring its plasticizing and pumping properties. It primarily affects the fluidity, cohesiveness, and water retention of concrete, properties that together determine whether the concrete is easy to work with and uniformly compacts. The slump meter used in related technologies includes a base plate, a cylinder, a tamping rod, a scraper, and a ruler. The concrete to be tested is poured into the cylinder three times, and the tamping rod is used to tamp the concrete evenly after each pour. The scraper is then used to smooth the concrete at the top of the cylinder and pull the cylinder upward. The ruler is used to measure the vertical height of the cylinder, and then the vertical height of the concrete. The difference between the two heights is the slump value of the concrete.

[0003] However, the existing testing process is cumbersome and prone to human error, and the subsequent cleanup process is also quite time-consuming. These shortcomings are particularly prominent in laboratory experiments. First, the tamping process can cause uneven application of force, leading to displacement of the tamping cone, causing concrete to flow out, increasing the material preparation volume and thus extending the experiment time. Furthermore, the process requires two people to work together (one to hold the slump cone firmly while the other to load the cone), which delays the subsequent batching time, thereby increasing the risk of cement concrete setting and seriously affecting the experimental progress. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a modular testing device and method for the slump and spread of cement concrete. The device and method can quickly complete the test of the slump and spread of concrete and are relatively simple to operate.

[0005] To achieve the above-mentioned object, the present invention discloses a modular testing device for the slump and spread of cement concrete, comprising a spread steel plate, a waste hopper, a device bracket, an operating panel, a slump cone, a discharge assembly for feeding concrete into the slump cone, and an oscillating rod assembly for oscillating the concrete in the slump cone;

[0006] The slump cone is placed on the expansion steel plate, the expansion steel plate is located on the waste hopper, a slot is provided on the device bracket, the expansion steel plate is located on the slot, a pumping device is provided on the inner wall of the slot, the waste hopper is connected to the pumping device, the laser sensor is installed on the device bracket, and the laser sensor is facing the side of the slump cone, and there is a distance between the laser sensor and the side wall of the slump cone, and the laser sensor is connected to the operation panel.

[0007] Furthermore, the slump cone is formed by connecting two side plates using snap fasteners.

[0008] Furthermore, a slide rail is provided on the device bracket, and a driving device is provided on the slide rail. The driving device can be a trolley. The laser sensor is located on the driving device, and the laser sensor is driven up and down by the driving device. The operation panel is connected to the driving device and the laser sensor.

[0009] Furthermore, the buckle includes a hook, a rotating shaft and a groove constraint device; the hook is connected to a side panel through the rotating shaft, sliding buttons are provided on both sides of the groove constraint device, the groove constraint device is fixed to the other side panel, and the hook is inserted into the groove constraint device.

[0010] Furthermore, the groove constraint device includes a shell and a rear spring, a baffle, a connecting shaft and a limit spring arranged in the shell; the rear spring is located in the slide groove on the inner side of the groove constraint device, one end of the connecting shaft is connected to a slide button, and the other end of the connecting shaft passes through the shell and is connected to another slide button. The limit spring surrounds the connecting shaft, the baffle is fixed in the shell, and there is a gap between the baffle and the connecting shaft, and the hook is inserted between the baffle and the connecting shaft through the opening on the shell and hooks the baffle.

[0011] Furthermore, the discharge assembly includes a funnel, a baffle plate and a first electromagnetic induction part; a feed plate is inserted into the funnel, the baffle plate is located at the discharge port at the lower end of the funnel, a first limit block is provided on the side of the funnel, the first electromagnetic induction part is located at the end of the first limit block, a through hole is provided at the top of the device bracket, a limit slot is provided on the upper part of the device bracket, a second electromagnetic induction part is provided in the limit slot, and when in use, the first limit block is inserted into the limit slot to connect the funnel with the through hole, and the first electromagnetic induction part is opposite to the second electromagnetic induction part.

[0012] Furthermore, the vibration rod assembly includes a third electromagnetic induction part, a vibration ball and an extension rod; the vibration ball is located at the lower end of the extension rod, and a second limit block is provided on the side of the upper end of the extension rod, and the second electromagnetic induction part is located on the side of the second limit block. When in use, the extension rod is inserted into the slump cone, the second limit block is inserted into the limit groove, and the third electromagnetic induction part is opposite to the second electromagnetic induction part.

[0013] Furthermore, the scraper cleaning assembly includes a shell, a telescopic rod, a scraper, a driven shaft, an active shaft and a fourth electromagnetic induction part; the scraper is fixed to one end of the telescopic rod, the lower end of the driven shaft is fixed to the upper end of the rotating shaft body, the upper end of the driven shaft is inserted into the shell and connected to the active shaft through a gear, the other end of the telescopic rod is inserted into the slot hole on the side of the rotating shaft body, and a scraper placement groove for placing the scraper is provided on the side of the rotating shaft body. A third limit block is provided on the side wall of the shell, and the fourth electromagnetic induction part is connected to the third limit block. When working, the scraper and the telescopic rod are located in the slump cone, the third limit block is located in the limit groove, and the fourth electromagnetic induction part is opposite to the second electromagnetic induction part.

[0014] Furthermore, the expansion steel plate has a plurality of concentrically distributed scale coils, each of which is led out through a straight line and marked with a degree.

[0015] The present invention discloses a modular testing method for the slump and spread of cement concrete, comprising the following steps:

[0016] Insert the expansion steel plate into the notch, join the slump cone with buckles, insert the hook into the groove constraint device, place the slump cone on the expansion steel plate, insert the waste hopper into the pumping device, install the discharge assembly, pour concrete into the funnel, pull out the baffle at the lower end of the funnel to allow the concrete to flow down into the slump cone, and when the concrete is filled to 1 / 3 of the slump cone, insert the baffle into the funnel, then remove the entire discharge assembly and insert the vibrating rod assembly;

[0017] After inserting the vibrating rod assembly, adjust the length of the extension rod and use the vibrating ball to remove the gaps in the concrete. Then remove the vibrating rod assembly and insert the discharge assembly to complete the concrete filling.

[0018] Repeat the above filling process until the entire slump cone is filled, and then smooth the concrete surface at the top opening of the slump cone to make it flush with the top opening of the slump cone;

[0019] Then press the two buckles with both hands, press the slide button, slide it away from the hook, open the buckle, move the slump cone slightly upwards, and move the slump cone horizontally from both sides. After the concrete collapses, control the drive device through the operation panel to move the laser sensor upward from the bottom layer and stop after it reaches the highest point of the concrete. Subtract the measured height from the height of the slump cone to get the slump, and then check the scale coil on the surface of the expansion steel plate to get the expansion.

[0020] The present invention has the following beneficial effects:

[0021] The modular testing device and method for the slump and expansion of cement concrete described in the present invention realizes different functions by replacing different components during specific operation. The experimenter only needs to observe the experimental process and replace accessories in time. When dealing with concrete gaps, an oscillating rod component is used to insert it into the concrete for leveling, which saves manpower and makes the slump cone less likely to shift. The cylinder is connected to the left and right with two buckles. Compared with the conventional upward lifting, the cylinder can be split into two parts and directly separated horizontally without affecting the internal concrete distribution. The design of the expansion steel plate can additionally test the expansion of concrete, avoiding errors caused by manual inspection. The waste hopper collects the concrete after the experiment, so that the experimenter does not need to clean the concrete on the floor after the experiment, thereby quickly completing the concrete slump and expansion test, and the operation is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 Schematic diagram of the structure of the buckle in the present invention;

[0025] Figure 3 Schematic diagram of the structure of the groove constraint device in the present invention;

[0026] Figure 4 Schematic diagram of the structure of the discharge assembly in the present invention;

[0027] Figure 5 It is a structural schematic diagram of the funnel, baffle plate and feed plate in the discharge assembly of the present invention;

[0028] Figure 6 A detailed structural diagram of the oscillating rod assembly of the present invention;

[0029] Figure 7 A detailed structural diagram of the scraper cleaning assembly of the present invention;

[0030] Figure 8 A detailed structural diagram of the internal rotating shaft, driven shaft, and active shaft of the scraper cleaning assembly of the present invention;

[0031] Figure 9 It is a structural schematic diagram below the device bracket;

[0032] Figure 10 It is a structural diagram of the pumping device;

[0033] Figure 11Schematic diagram of the structure of the expanded steel plate;

[0034] Figure 12 It is a front cross-sectional view of the main body of the present invention;

[0035] Figure 13 It is a front view of the main body of the present invention;

[0036] Figure 14 A perspective view of the insertion surface of the discharge assembly of the present invention;

[0037] Figure 15 A perspective view of the insertion surface of the vibrating rod assembly of the present invention;

[0038] Figure 16 A perspective view of the side surface of the scraper cleaning assembly of the present invention is inserted;

[0039] Figure 17 This is a schematic diagram of the structure when the buckle is in use.

[0040] Among them, 1 is a through hole, 2 is a buckle, 3 is a laser sensor, 31 is a sensor screen, 4 is an expansion steel plate, 5 is a waste hopper, 6 is an operation panel, 7 is a hook, 71 is a rotating shaft, 8 is a slide button, 81 is a groove constraint device, 811 is a baffle, 812 is a limit spring, 813 is a rear spring, 814 is a connecting shaft, 9 is a notch, 10 is a pumping device, 101 is a pulley, 102 is a track, 11 is a slump cone, 111 is a glass observation surface, 12 is a scraper cleaning assembly, 121 is a rotating shaft, 122 is a telescopic rod, 123 is a scraper, 124 is a driven rotating shaft, 125 is an active rotating shaft, 13 is a discharge assembly, 131 is a funnel, 132 is a baffle, 133 is a feed plate, 14 is an oscillation rod assembly, 141 is an extension rod, 142 is an oscillation ball, 15 is an electromagnetic induction part, and 16 is a device bracket. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] In the description of the present invention, it is to be understood that the terms “include” and “comprise” indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0043] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0044] It should be further understood that the term "and / or" as used in the present specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0045] It should be understood that although the terms "first," "second," and "third" may be used to describe preset ranges in embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are merely used to distinguish one preset range from another. For example, without departing from the scope of embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0046] The word "if," as used herein, may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0048] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0049] refer to Figures 1 to 17 The modular testing device for the slump and spread of cement concrete of the present invention includes a device bracket 16, an operating panel 6 and a slump cone 11. The slump cone 11 is formed by connecting two side panels with a buckle 2.

[0050] The slump cone 11 is placed on the expansion steel plate 4, the expansion steel plate 4 is located on the waste hopper 5, a slot 9 is provided on the device bracket 16, the expansion steel plate 4 is located on the slot 9, specifically, a pumping device 10 is provided on the inner wall of the slot 9, the waste hopper 5 is connected to the pumping device 10, the laser sensor 3 is installed on the device bracket 16, and the laser sensor 3 is facing the side of the slump cone 11, and there is a distance between the side wall of the slump cone 11, and the operation panel 6 is provided on the device bracket 16.

[0051] It should be noted that two glass observation surfaces 111 are provided on the side of the slump cone 11, wherein the two glass observation surfaces 111 are located at 1 / 3 and 2 / 3 of the height of the slump cone 11, and there are two clips 2, which are located on both sides of the slump cone 11.

[0052] A slide rail is provided on the device bracket 16, and a driving device is provided on the slide rail. The driving device can be a trolley. The laser sensor 3 is located on the driving device, and the laser sensor 3 is driven up and down by the driving device. The operation panel 6 is connected to the driving device and the laser sensor 3.

[0053] The buckle 2 includes a hook 7, a rotating shaft 71, a slide button 8 and a groove constraint device 81; the hook 7 is connected to a side panel through the rotating shaft 71, the slide button 8 is arranged on the side of the groove constraint device 81, the groove constraint device 81 is fixed to the other side panel, and the hook 7 is inserted into the groove constraint device 81. When separating, the slide button 8 is slid to separate the groove constraint device 81 from the hook 7.

[0054] The groove constraint device 81 includes a shell and a rear spring 813, a baffle 811, a connecting shaft 814 and a limit spring 812 arranged in the shell; the rear spring 813 is located in the slide groove on the inner side of the groove constraint device 81, one end of the connecting shaft 814 is connected to a slide button 8, and the other end of the connecting shaft 814 passes through the shell and is connected to another slide button 8, the limit spring 812 surrounds the connecting shaft 814, the baffle 811 is fixed in the shell, and there is a gap between the baffle 811 and the connecting shaft 814 for the limit spring 812 to surround, and when connected, the hook 7 is inserted between the baffle 811 and the connecting shaft 814 through the opening on the shell and hooks the baffle 811.

[0055] The discharge assembly 13 includes a funnel 131, a baffle plate 132 and a first electromagnetic induction part 15; a feed plate 133 is inserted into the funnel 131, the baffle plate 132 is located at the discharge port at the lower end of the funnel 131, and a first limit block is provided on the side of the funnel 131. The first electromagnetic induction part 15 is located at the end of the first limit block. A through hole 1 is provided at the top of the device bracket 16, and a limit groove is provided on the upper part of the device bracket 16. A second electromagnetic induction part 15 is provided in the limit groove. The first limit block is inserted into the limit groove to connect the funnel 131 with the through hole 1. The first electromagnetic induction part 15 is opposite to the second electromagnetic induction part 15. When in use, the baffle plate 132 and the upper end of the slump cone 11 are engaged with each other.

[0056] The vibration rod assembly 14 includes a third electromagnetic induction part 15, an vibration ball 142 and an extension rod 141; the vibration ball 142 is located at the lower end of the extension rod 141, and the extension rod 141 is divided into three sections, all of which can be controlled to extend and shorten. A second limit block is provided on the side of the upper end of the extension rod 141, and the second electromagnetic induction part 15 is located on the side of the second limit block. When in use, the extension rod 141 is inserted into the slump cone 11, the second limit block is inserted into the limit groove, and the third electromagnetic induction part 15 is opposite to the second electromagnetic induction part 15.

[0057] The scraper cleaning assembly 12 includes a shell, a telescopic rod 122, a scraper 123, a driven rotating shaft 124, a driving rotating shaft 125 and a fourth electromagnetic induction part 15; the scraper 123 is fixed to one end of the telescopic rod 122, the lower end of the driven rotating shaft 124 is fixed to the upper end of the rotating shaft body 121, the upper end of the driven rotating shaft 124 is inserted into the shell and connected to the driving rotating shaft 125 through a gear, the other end of the telescopic rod 122 is inserted into the slot hole on the side of the rotating shaft body 121, and a scraper placement groove for placing the scraper 123 is provided on the side wall of the rotating shaft body 121, a third limit block is provided on the side wall of the shell, and the fourth electromagnetic induction part 15 is connected to the third limit block. When working, the scraper 123 and the telescopic rod 122 are located in the slump cone 11, the third limit block is located in the limit groove, and the fourth electromagnetic induction part 15 is opposite to the second electromagnetic induction part 15.

[0058] The pumping device 10 includes a pulley 101 and a track 102 . The pulley 101 is connected to the side of the waste hopper 5 and is located inside the track 102 . The waste hopper 5 is used to receive waste, and the waste hopper 5 can slide out with the help of the pulley 101 .

[0059] The expansion steel plate 4 has a plurality of concentrically distributed scale coils, each of which is led out through a straight line and marked with a degree.

[0060] The modular testing method for the slump and spread of cement concrete of the present invention comprises the following steps:

[0061] Insert the expansion steel plate 4 into the slot 9, splice the slump cone 11 with the buckle 2, insert the hook 7 into the groove constraint device 81, place the slump cone 11 at the scale center of the expansion steel plate 4, insert the waste hopper 5 into the pumping device 10, install the discharge assembly 13, insert the feed plate 133 into the funnel 131, pour concrete into the funnel 131, pull out the baffle plate 132 at the lower end of the funnel 131, so that the concrete flows down into the slump cone 11, and when the concrete is filled to 1 / 3 of the slump cone 11, the laser sensor 3 sends a feedback signal. At this time, insert the baffle plate 132 into the funnel 131, then remove the entire discharge assembly 13, and then insert it into the vibrating rod assembly 14.

[0062] After inserting the vibrating rod assembly 14, by adjusting the length of the extension rod 141, the vibrating ball 142 is used to remove the gaps in the concrete, and then the vibrating rod assembly 14 is removed, and then the discharge assembly 13 is inserted to complete the concrete filling.

[0063] Repeat the above filling process until the entire slump cone 11 is filled, and then smooth the concrete surface at the top opening of the slump cone 11 to make it flush with the top opening of the slump cone 11.

[0064] Then, press the two buckles 2 with both hands, press the slide button 8, slide it away from the hook 7, open the buckle 2, move the slump cone 11 slightly upwards, and move the slump cone 11 horizontally from both sides. After the concrete collapses, control the laser sensor 3 through the operation panel 6 to move it upward from the bottom layer, stop after moving to the highest point of the concrete, and then display the height through the sensor screen 31. Subtract the measured height from the height of the slump cone 11 to obtain the slump, check the surface of the expansion steel plate 4, observe the value, and obtain the expansion.

[0065] Then the expansion steel plate 4 is slowly moved horizontally out of the slot 9, the concrete is poured into the waste hopper 5, and then the slot 9 is inserted again. The slump cone 11 is spliced ​​again and placed at the scale center of the expansion steel plate 4. The scraper cleaning assembly 12 is inserted, and the scraper 123 and the telescopic rod 122 are located in the scraper placement groove and slot hole on the rotating shaft 121. There will be no scraping with the slump cone 11. The slump cone 11 surrounds the rotating shaft 121, and the telescopic rod 122 and the active rotating shaft 125 are started to drive the passive rotating shaft 124 below. The scraper 123 begins to rotate along the cylinder wall to scrape off the residual concrete, and the concrete falls to the expansion steel plate 4. The active rotating shaft 125 and the telescopic rod 122 are reset, the slump cone 11 is removed, the expansion steel plate 4 is pulled out, and the concrete is poured into the waste hopper 5. The waste hopper 5 is pulled forward by the pumping device 10, and the waste hopper 5 is pulled out to dispose of the waste.

[0066] Those skilled in the art will readily identify other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0067] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0068] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A modular testing device for the slump and spread of cement concrete, characterized in that: The device comprises an expansion steel plate (4), a waste hopper (5), a device bracket (16), an operation panel (6), a slump cone (11), a discharge assembly (13) for feeding concrete into the slump cone (11), and an oscillating rod assembly (14) for oscillating the concrete in the slump cone (11); A slump cone (11) is placed on an expansion steel plate (4), which is located on a waste hopper (5). A notch (9) is provided on a device bracket (16), and the expansion steel plate (4) is located on the notch (9). A pumping device (10) is provided on the inner wall of the notch (9). The waste hopper (5) is connected to the pumping device (10). A laser sensor (3) is installed on the device bracket (16), and the laser sensor (3) faces the side of the slump cone (11) and is spaced apart from the side wall of the slump cone (11). The laser sensor (3) is connected to an operation panel (6).

2. The modular testing device for slump and spread of cement concrete according to claim 1, characterized in that: The slump cone (11) is formed by connecting two side plates using a buckle (2).

3. The modular testing device for slump and spread of cement concrete according to claim 2, characterized in that: A slide rail is provided on the device bracket (16), and a driving device is provided on the slide rail. The driving device can be a trolley. The laser sensor (3) is located on the driving device, and the laser sensor (3) is driven to move up and down by the driving device. The operation panel (6) is connected to the driving device and the laser sensor (3).

4. The modular testing device for slump and spread of cement concrete according to claim 3, characterized in that: The buckle (2) comprises a hook (7), a rotating shaft (71) and a groove restraining device (81); the hook (7) is connected to a side plate via the rotating shaft (71); sliding buttons (8) are provided on both sides of the groove restraining device (81); the groove restraining device (81) is fixed to the other side plate; the hook (7) is inserted into the groove restraining device (81).

5. The modular testing device for slump and spread of cement concrete according to claim 4, characterized in that: The groove restraining device (81) comprises a housing and a rear spring (813), a baffle (811), a connecting shaft (814) and a limit spring (812) arranged in the housing; the rear spring (813) is located in a sliding groove on the inner side of the groove restraining device (81); one end of the connecting shaft (814) is connected to a sliding button (8); the other end of the connecting shaft (814) passes through the housing and is connected to another sliding button (8); the limit spring (812) surrounds the connecting shaft (814); the baffle (811) is fixed in the housing, and a gap exists between the baffle (811) and the connecting shaft (814); the hook (7) is inserted between the baffle (811) and the connecting shaft (814) through an opening on the housing and hooks the baffle (811).

6. The modular testing device for cement concrete slump and spread according to claim 5, characterized in that: The discharge assembly (13) includes a funnel (131), a baffle plate (132) and a first electromagnetic induction part (15); a feed plate (133) is inserted into the funnel (131), the baffle plate (132) is located at the discharge port at the lower end of the funnel (131), a first limit block is provided on the side of the funnel (131), the first electromagnetic induction part (15) is located at the end of the first limit block, a through hole (1) is provided on the top of the device bracket (16), a limit slot is provided on the upper part of the device bracket (16), a second electromagnetic induction part (15) is provided in the limit slot, and when in use, the first limit block is inserted into the limit slot to connect the funnel (131) with the through hole (1), and the first electromagnetic induction part (15) is directly opposite to the second electromagnetic induction part (15).

7. The modular testing device for slump and spread of cement concrete according to claim 6, characterized in that: The oscillating rod assembly (14) comprises a third electromagnetic induction part (15), an oscillating ball (142) and an extension rod (141); the oscillating ball (142) is located at the lower end of the extension rod (141); a second limiting block is provided on the side of the upper end of the extension rod (141); the second electromagnetic induction part (15) is located on the side of the second limiting block; when in use, the extension rod (141) is inserted into the slump cone (11), the second limiting block is inserted into the limiting groove, and the third electromagnetic induction part (15) is directly opposite to the second electromagnetic induction part (15).

8. The modular testing device for slump and spread of cement concrete according to claim 1, characterized in that: The scraper cleaning assembly (12) comprises a housing, a telescopic rod (122), a scraper (123), a driven rotating shaft (124), a driving rotating shaft (125) and a fourth electromagnetic induction part (15); the scraper (123) is fixed to one end of the telescopic rod (122), the lower end of the driven rotating shaft (124) is fixed to the upper end of the rotating shaft body (121), the upper end of the driven rotating shaft (124) is inserted into the housing and connected to the driving rotating shaft (125) through a gear, and the other end of the telescopic rod (122) is inserted into the housing. A scraper placement groove for placing a scraper (123) is provided on the side of the rotating shaft (121), and a third limit block is provided on the side wall of the housing. The fourth electromagnetic induction part (15) is connected to the third limit block. When working, the scraper (123) and the telescopic rod (122) are located in the slump cone (11), the third limit block is located in the limit groove, and the fourth electromagnetic induction part (15) is opposite to the second electromagnetic induction part (15).

9. The modular testing device for slump and spread of cement concrete according to claim 7, characterized in that: The expansion steel plate (4) has a plurality of concentrically distributed scale coils, each of which is led out through a straight line and marked with a degree.

10. A modular testing method for slump and spread of cement concrete, characterized in that: The modular testing device for the slump and spread of cement concrete according to claim 9 comprises the following steps: Insert the expansion steel plate (4) into the notch (9), splice the slump cone (11) by means of the buckle (2), insert the hook (7) into the groove constraint device (81), place the slump cone (11) on the expansion steel plate (4), insert the waste hopper (5) into the pumping device (10), install the discharge assembly (13), pour concrete into the funnel (131), pull out the baffle (132) at the lower end of the funnel (131) so that the concrete flows down into the slump cone (11), and when the concrete is filled to 1 / 3 of the slump cone (11), insert the baffle (132) into the funnel (131), then remove the entire discharge assembly (13), and then insert it into the vibrating rod assembly (14); After inserting the vibrating rod assembly (14), the length of the extension rod (141) is adjusted, and the vibrating ball (142) is used to remove the gaps in the concrete. The vibrating rod assembly (14) is then removed, and the discharge assembly (13) is then inserted to complete the filling of the concrete. Repeat the above filling process until the entire slump cone (11) is filled, and then smooth the concrete surface at the top opening of the slump cone (11) to make it flush with the top opening of the slump cone (11); Then, press the two buckles (2) with both hands, press the slide button (8), slide it in the direction away from the hook (7), open the buckle (2), move the slump cone (11) slightly upward, and move the slump cone (11) horizontally out from both sides. After the concrete collapses, control the driving device through the operation panel (6) to move the laser sensor (3) upward from the bottom layer and stop after moving to the highest point of the concrete. Subtract the measured height from the height of the slump cone (11) to obtain the slump, and then check the scale coil on the surface of the expansion steel plate (4) to obtain the expansion.

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