A cement hardness testing machine

Abstract

The present invention discloses a cement hardness detector, which includes a base, an L-shaped bracket, a detection baffle, a protective box, a support seat, and a gas supply seat. The detection baffle is located above the base, and the L-shaped bracket is connected between the base and the detection baffle. The protective box is installed on the detection baffle. The support seat is located between the detection baffle and the base, and the gas supply seat is located inside the protective box. In the present invention, inflation and pressurization are carried out in multiple high-pressure cylinders. The support seat is used to drive the cement product to lift and lower, and the different lengths of the cylinder rods cause the high-pressure cylinders to present different pressures, so that the cement product is subjected to different pressures for hardness detection, thereby performing multi-point and multi-pressure hardness detection on the cement product to improve the hardness detection efficiency of the cement product. By using the cooperation of the support seat and the strip-shaped support column, the cement product slides through the support rollers, thus facilitating the handling of the cement product and facilitating the use by the staff.

Description

Technical Field

[0001] The present invention relates to the field of equipment related to cement products, and in particular to a cement hardness detector. Background Art

[0002] Cement is a powdery hydraulic inorganic binder. After being mixed with water and stirred, it becomes a slurry, which can harden in the air or in water and can firmly cement materials such as sand and stone together. The early mixture of lime and volcanic ash was very similar to modern lime-volcanic ash cement. The concrete made by cementing crushed stones with it not only has relatively high strength after hardening, but also can resist the erosion of fresh water or salt water. For a long time, as an important binder, it has been widely used in civil engineering, water conservancy, national defense and other projects.

[0003] In professional terms, the hardness of cement is strength. In the production of cement products, hardness detection devices are often used to detect whether the strength of cement products meets the standards. When the existing hardness detection devices detect the hardness of cement products, since only single-point detection and single-pressure detection can be carried out, in order to ensure the integrity of the hardness detection of cement products, it is necessary to detect various pressures at different positions of the cement products, so as to obtain a hardness detection report. However, using traditional hardness detection devices for hardness detection will waste a lot of time and labor and cannot improve the hardness detection efficiency. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and design a cement hardness detector.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A cement hardness detector includes a base, an L-shaped bracket, a detection baffle, a protection box, a support seat, and a gas supply seat. The detection baffle is located above the base, the L-shaped bracket is connected between the base and the detection baffle, the protection box is installed on the detection baffle, the support seat is located between the detection baffle and the base, and the gas supply seat is located inside the protection box;

[0007] The detection baffle is provided with cylinder holes, the cylinder holes are evenly distributed in an equilateral triangle, high-pressure cylinders are installed in the cylinder holes, a cylinder piston is movably installed inside the high-pressure cylinders, a cylinder rod is installed at the lower end of the cylinder piston, a hardness detection plate is installed at the lower end of the cylinder rod, and the lengths of the cylinder rods form an arithmetic progression and gradually decrease, and the cylinder rod at the center of the detection baffle is the longest;

[0008] A number of conical grooves are formed on the air supply seat. The conical grooves correspond to the positions of the high-pressure cylinders. Connecting air pipes are installed between the conical grooves and the high-pressure cylinders. A pressure sensor I is installed on the connecting air pipes corresponding to the high-pressure cylinders at the longest and shortest positions of the cylinder rod. A sealing box is installed on the upper surface of the air supply seat. An electric push rod is installed at the center of the upper surface inside the sealing box. A sealing baffle is installed at the telescopic end of the electric push rod. A number of sealing cylinders are installed on the lower surface of the sealing baffle. A conical sealing seat is installed at the lower end of the sealing cylinder. The conical sealing seat is movably inserted into the conical groove. The sealing cylinder and the conical sealing seat are sealed with the conical groove through a sealing gasket;

[0009] Furthermore, a hydraulic cylinder is installed between the support seat and the base. The hydraulic cylinders are located at the four corners below the support seat. A fixing groove is formed on the upper surface of the support seat. A number of strip-shaped through grooves are formed on the lower surface of the fixing groove. The strip-shaped through grooves are evenly distributed in the fixing groove. A number of strip-shaped support columns are installed on the upper surface of the base. The strip-shaped support columns are movably inserted into the strip-shaped through grooves. Support rollers are installed at the upper ends of the strip-shaped support columns.

[0010] Furthermore, an upper baffle is installed below the outer surface of the cylinder rod. A sliding sleeve is sleeved below the outer surface of the cylinder rod. A lower baffle is installed at the lower end of the outer surface of the sliding sleeve. A conical protective cover is installed on the lower baffle. A compression spring is arranged between the upper baffle and the lower baffle. The compression spring is sleeved on the sliding sleeve and the cylinder rod.

[0011] Furthermore, a pressure sensor II is installed on one side of the upper surface of the sealing box. An exhaust pipe is installed on the other side of the upper surface of the sealing box. An exhaust solenoid valve is installed on the exhaust pipe. An inflation pipe is installed on one side surface of the sealing box. An inflation solenoid valve is installed on the inflation pipe.

[0012] Furthermore, when the hydraulic cylinder is fully retracted, the strip-shaped support columns extend out of the fixing groove. After the hydraulic cylinder extends by a fixed length, the support rollers are fully retracted into the strip-shaped through grooves.

[0013] Furthermore, the initial air pressures inside all the high-pressure cylinders on the detection baffle are the same.

[0014] Furthermore, a detection comparison nameplate is installed on the L-shaped bracket. A pressure-hardness comparison table is engraved on the detection comparison nameplate. The pressure-hardness comparison table is marked with the internal air pressure range values of the high-pressure cylinders.

[0015] Furthermore, the internal air pressure of the high-pressure cylinder is normal pressure when it is not in use.

[0016] Furthermore, the distance between the lowermost conical protective cover and the support roller is greater than the thickness of the cement product.

[0017] Furthermore, after the conical protective cover shrinks, the hardness detection plate extends out of the conical protective cover.

[0018] A cement hardness detector manufactured by using the technical solution of the present invention has the following beneficial effects:

[0019] This hardness detector inflates and pressurizes in multiple high-pressure cylinders, then drives the cement product to rise and fall by using the support base, so that the cement product pushes the hardness detection plate to rise, and due to the different lengths of the cylinder rods, different pressures are presented inside the multiple high-pressure cylinders, and the cement product is detected, so that the hardness of the cement product can be detected under multiple points and multiple pressures, effectively improving the hardness detection efficiency of the cement product and saving the detection time.

[0020] This hardness detector uses the cooperation of the support base and the strip-shaped support column to make the cement product slide through the support rollers, thus facilitating the handling of the cement product and facilitating the use by the staff.

[0021] This hardness detector can facilitate the inflation and deflation operations of the high-pressure cylinders through the use of the sealed box, effectively facilitating the operation of the staff, reducing the use of electrical devices, and at the same time, by using the connection of the high-pressure cylinders, the synchronism of the air pressure values of the high-pressure cylinders can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a cement hardness detector according to the present invention;

[0023] Figure 2 is a schematic diagram of the detection baffle according to the present invention;

[0024] Figure 3 is a schematic diagram of the cylinder mounting hole according to the present invention;

[0025] Figure 4 is a schematic diagram of the air supply base according to the present invention;

[0026] Figure 5 is a top view of the conical groove according to the present invention;

[0027] Figure 6 is a schematic diagram of the conical protective cover according to the present invention;

[0028] Figure 7 is a top view of the support base according to the present invention;

[0029] Figure 8 is a schematic diagram of the strip-shaped support column according to the present invention;

[0030] In the figure, 1 is the base; 2 is the L-shaped bracket; 3 is the detection baffle; 4 is the protection box; 5 is the support base; 6 is the air supply base; 7 is the cylinder hole; 8 is the high-pressure cylinder; 9 is the cylinder piston; 10 is the cylinder rod; 11 is the hardness detection plate; 12 is the conical groove; 13 is the connecting air pipe; 14 is the air pressure sensor I; 15 is the sealing box; 16 is the electric push rod; 17 is the sealing baffle; 18 is the sealing cylinder; 19 is the conical sealing seat; 20 is the sealing gasket; 21 is the hydraulic cylinder; 22 is the fixed groove; 23 is the strip-shaped through groove; 24 is the strip-shaped support column; 25 is the support roller; 26 is the upper baffle; 27 is the sliding sleeve; 28 is the lower baffle; 29 is the conical protective cover; 30 is the compression spring; 31 is the air pressure sensor II; 32 is the exhaust pipe; 33 is the exhaust solenoid valve; 34 is the charging pipe; 35 is the charging solenoid valve; 36 is the detection comparison nameplate. Detailed implementation manner

[0031] The present invention will be specifically described below in conjunction with the accompanying drawings, as Figure 1-8 shown.

[0032] In this device, the device is powered by connecting to an external power supply and is controlled by a controller. The external power supply is electrically connected to the controller, the electric push rod 16, the exhaust solenoid valve 33, the charging solenoid valve 35, and the hydraulic cylinder 21 for power supply. The model of the controller is the DVP16ES200T model controller. The control signal output end of the controller is electrically connected to the electric push rod 16, the exhaust solenoid valve 33, the charging solenoid valve 35, and the hydraulic cylinder 21 through transistors respectively. The control signal receiving end of the controller is electrically connected to the air pressure sensor I 14 and the air pressure sensor II 31, thereby controlling the operation of the entire device.

[0033] The creative point of this solution lies in the following structural design. Combining the attached Figure 1 attachment Figure 2 attachment Figure 3 attachment Figure 4 attachment Figure 5 attachment Figure 6, a detection baffle is provided with cylinder holes 7. The cylinder holes are evenly distributed in an equilateral triangle pattern. A high-pressure cylinder 8 is installed inside the cylinder holes. A cylinder piston 9 is movably installed inside the high-pressure cylinder. A cylinder rod 10 is installed at the lower end of the cylinder piston. A hardness detection plate 11 is installed at the lower end of the cylinder rod. The lengths of the cylinder rods form an arithmetic progression and gradually decrease. The cylinder rod at the center of the detection baffle has the longest length. The air supply seat is provided with a number of conical grooves 12. The conical grooves correspond to the positions of the high-pressure cylinders. A connecting air pipe 13 is installed between the conical grooves and the high-pressure cylinders. A pressure sensor 1 is installed on the connecting air pipes corresponding to the high-pressure cylinders where the cylinder rods have the longest and shortest lengths. A sealing box 15 is installed on the upper surface of the air supply seat. An electric push rod 16 is installed at the center of the upper surface inside the sealing box. A sealing baffle 17 is installed at the telescopic end of the electric push rod. A number of sealing cylinders 18 are installed on the lower surface of the sealing baffle. A conical sealing seat 19 is installed at the lower end of the sealing cylinder. The conical sealing seat is movably inserted into the conical groove. The sealing cylinder and the conical sealing seat are sealed with the conical groove through a sealing gasket 20. By using multiple identical high-pressure cylinders 8, the synchronization when the air pressure inside the high-pressure cylinders 8 changes can be effectively ensured, so that the air pressure inside the high-pressure cylinders 8 can show an approximately arithmetic progression effect as the cylinder rods 10 contract, which is convenient for the staff to record. And through the setting of the cylinder rods 10 in an arithmetic progression, after all the cylinder rods 10 contract, different pressures will appear inside the high-pressure cylinders 8, so that the cement products are subjected to different pressures at different positions to detect the hardness of the cement products, so that the cement products can be subjected to hardness detection at multiple positions and multiple pressures simultaneously, improving the detection efficiency. And through the cooperation of the conical grooves 12 with the sealing cylinders 18 and the conical sealing seats 19, on the one hand, the opening and closing of the high-pressure cylinders 8 can be controlled, which is convenient for the staff to adjust the air pressure inside the high-pressure cylinders 8. On the other hand, when the high-pressure cylinders 8 are in a connected state, the synchronization of the air pressure during inflation can be ensured, ensuring that the air pressure inside the high-pressure cylinders 8 is the same. On the other hand, the high-pressure cylinders 8 can be quickly exhausted to avoid the dangerous state of the cylinders being under high pressure for a long time.

[0034] The creative point of this solution lies in the following structural design. In combination with the attached Figure 1 , attached Figure 7 and attached Figure 8, a hydraulic cylinder 21 is installed between the support base and the base. The hydraulic cylinders are located at the four corners below the support base. A fixing groove 22 is formed on the upper surface of the support base. A plurality of strip-shaped through grooves 23 are formed on the lower surface of the fixing groove. The strip-shaped through grooves are evenly distributed in the fixing groove. A plurality of strip-shaped support columns 24 are installed on the upper surface of the base. The strip-shaped support columns are movably inserted into the strip-shaped through grooves. A support roller 25 is installed at the upper end of the strip-shaped support column. By using the fixing groove 22, it is convenient to hold the cement product, so that the cement product will not shake and shift during the hardness test. By using the strip-shaped through grooves 23 and the strip-shaped support columns 24, the cement product can be placed above the support base 5 before and after the test. By using the support roller 25, it is convenient for the staff to move the cement product, which is convenient for the operation and use of the staff.

[0035] The creative point of this solution lies in the following structural design. Combining with the attached Figure 1 , attached Figure 2 and attached Figure 6 , an upper baffle 26 is installed below the outer surface of the cylinder rod. A sliding sleeve 27 is sleeved below the outer surface of the cylinder rod. A lower baffle 28 is installed at the lower end of the outer surface of the sliding sleeve. A conical protective cover 29 is installed on the lower baffle. A compression spring 30 is arranged between the upper baffle and the lower baffle. The compression spring is sleeved on the sliding sleeve and the cylinder rod. By using the conical protective cover 29 that can be lifted and lowered, the detection point of the cement product can be protected, and the situation of debris splashing after the cement product is broken can be avoided.

[0036] In this device, a second air pressure sensor 31 is installed on one side of the upper surface of the sealed box. An exhaust pipe 32 is installed on the other side of the upper surface of the sealed box. An exhaust solenoid valve 33 is installed on the exhaust pipe. An inflation pipe 34 is installed on one side surface of the sealed box. An inflation solenoid valve 35 is installed on the inflation pipe. It is convenient for the staff to control the air pressure inside the sealed box 15, so as to facilitate the staff to quickly control the air pressure inside the high-pressure cylinder 8.

[0037] In this device, when the hydraulic cylinder is fully retracted, the strip-shaped support column extends out of the fixing groove. After the hydraulic cylinder extends a fixed length, the support roller is fully retracted into the strip-shaped through groove. It is convenient to control the cement product, so that the cement product can be quickly separated from the support base 5 to ensure that the cement product can slide away quickly.

[0038] In this device, the initial air pressures inside all the high-pressure cylinders on the detection baffle are the same. It is ensured that the air pressures inside the high-pressure cylinders 8 are approximately in an arithmetic progression after the cylinder rods 10 are retracted, so as to facilitate the staff to determine the approximate pressures inside each high-pressure cylinder 8 and facilitate the staff's recording.

[0039] In this device, a detection and comparison nameplate 36 is installed on the L-shaped bracket. The detection and comparison nameplate is engraved with a pressure-hardness comparison table, and the pressure-hardness comparison table is marked with the internal air pressure range value of the high-pressure cylinder; this can facilitate the staff to make comparison records to determine whether the hardness of the cement products is qualified.

[0040] In this device, when the high-pressure cylinder is not in use, the internal air pressure is normal pressure; this ensures the safety of the high-pressure cylinder 8 itself and avoids damage caused by the high-pressure cylinder 8 being in a high-pressure state for a long time.

[0041] In this device, the distance between the conical protective cover at the bottom and the support roller is greater than the thickness of the cement product; this ensures that the cement product can slide smoothly.

[0042] Working principle:

[0043] When this device needs to be used, the staff connects this device to an external power source. Then, according to the standard hardness of the current cement product, the staff connects the air charging pipe 34 to an external air source. Then, the staff controls the air charging solenoid valve 35 to open through the controller, and then controls the electric push rod 16 to start contracting, so that the electric push rod 16 drives the sealing baffle 17 to rise, making the sealing cylinder 18 separate from the air supply seat 6, and the conical sealing seat 19 separate from the conical groove 12, so that the connecting air pipe 13 is communicated with the sealing box 15. With the injection of external air, the external gas enters the sealing box 15 through the air charging pipe 34, and then is injected into the corresponding high-pressure cylinder 8 through the connecting air pipe 13. When the air pressure value detected by the air pressure sensor 14 reaches the set value, at this time, the air charging solenoid valve 35 is controlled to close, and then the electric push rod 16 is controlled to start extending, and the sealing baffle 17 is pushed down through the electric push rod 16, so that the conical sealing seat 19 starts to insert into the conical groove 12, and by squeezing the sealing gasket 20, the connecting air pipe 13 starts to be blocked, and the conical sealing seat 19 is sealed;

[0044] At this time, the initial air pressure inside the high-pressure cylinder 8 reaches the preset air pressure with the blocking of the connecting air pipe 13. Then, the air charging solenoid valve 35 is controlled to open again, and continue to charge the sealing box 15, and the air pressure inside the sealing box 15 is detected by the air pressure sensor 2 31. When the air pressure inside the sealing box 15 reaches the pressure value corresponding to the maximum hardness of the cement on the detection and comparison nameplate 36, at this time, the air charging solenoid valve 35 is controlled to close, and then the air charging pipe 34 can be disconnected from the external air source;

[0045] At this time, the staff places the cement product on the support seat 5 on the base 1, and places the cement product on the strip-shaped support column 24. The cement product can slide through the support rollers 25. Then, the staff manually pushes the cement product and pushes it above the fixing groove 22. Then, the control hydraulic cylinder 21 starts to extend. As the hydraulic cylinder 21 extends, the hydraulic cylinder 21 pushes the support seat 5 to start rising, making the support seat 5 gradually contact the cement product and making the cement product enter the fixing groove 22, so that the cement product is fixed in the support seat 5. Then, as the hydraulic cylinder 21 continues to rise, at this time, the cement product rises with the rise of the support seat 5 and contacts the conical protective cover 29 at the lower end of the cylinder rod 10. Since the inside of the high-pressure cylinder 8 is in a high-pressure state at this time, as the conical protective cover 29 contacts the cement product, the conical protective cover 29 starts to rise, and at this time, the cylinder rod 10 remains stationary under the pressure of the air pressure;

[0046] As the conical protective cover 29 rises, at this time, the hardness detection plate 10 starts to contact the cement product and pushes the cylinder rod 10 to start moving upward, making the cylinder piston 8 start to be compressed with the air pressure inside the high-pressure cylinder 8 to increase the air pressure inside the high-pressure cylinder 8. When the pressure of the pressure sensor 14 corresponding to the shortest cylinder rod 10 reaches the set value, at this time, the control hydraulic cylinder 21 stops working;

[0047] At this time, through the contraction of the cylinder rods 10 of different lengths, the displacement heights of the cylinder pistons 8 are different, so that the air pressure inside the high-pressure cylinder 8 is different. According to the increase in the length of the cylinder rod 10, the air pressure inside the high-pressure cylinder 8 gradually increases. At the same time, the staff can compare the pressure value of the pressure sensor 14 corresponding to the longest cylinder rod 10 with the corresponding value on the detection comparison nameplate 36 to ensure that the air pressure value conforms to the data on the detection comparison nameplate 36. Then, the staff can record the corresponding pressure value according to the current air pressure and compare the hardness at different positions according to the detection comparison nameplate 36, so as to obtain the hardness of the cement product;

[0048] During the above detection process, the pressure of the pressure sensor 14 corresponding to the shortest cylinder rod 10 reaching the set value is the lowest value of the compressive strength of the cement grade, so that the cement product can detect the compressive strength values under different pressure intensities to detect whether the cement product meets the standard;

[0049] When the cement product is detected, at this time, the control hydraulic cylinder 21 starts to contract. As the hydraulic cylinder 21 contracts, the support seat 5 drives the cement product to start descending, and the cement product is pushed out of the fixing groove 22 through the strip-shaped support column 24. When the hydraulic cylinder 21 is completely contracted, at this time, the staff can manually push the cement product away from the device.

[0050] During the use of this device, when the pressure of the pressure sensor -14 corresponding to the shortest cylinder rod 10 reaches the set value, but the pressure of the pressure sensor -14 corresponding to the longest cylinder rod 10 does not reach the set value, at this time, the staff controls the hydraulic cylinder 21 to continue to extend, so that the pressure of the pressure sensor -14 corresponding to the longest cylinder rod 10 reaches the set value, thereby obtaining the hardness of the cement product at this time, and the pressure values corresponding to the other high-pressure cylinders 8 can be equally divided between the maximum pressure and the minimum pressure.

[0051] When the device is used up, at this time, the staff controls the exhaust solenoid valve 33 to open through the controller, and controls the electric push rod 16 to start contracting, so that the connecting air pipe 13 is in an open state. At this time, the compressed gas inside the sealed box 15 and the high-pressure cylinder 8 is discharged to the outside through the exhaust pipe 32, so that the high-pressure cylinder 8 and the sealed box 15 are in an atmospheric pressure state, thereby avoiding damage to the device due to long-term high-pressure state.

[0052] In this device, the hardness detection plate 10 is protected by the conical protective cover 29, which can effectively avoid the splashing caused by the breakage of the cement product during the detection process, and effectively protect the device.

[0053] This device squeezes different parts of the cement product with different pressures, thereby obtaining the strength of each part of the cement product. The staff can visually check whether the outer surface of the cement product is damaged or sunken. When damage or depression occurs, it indicates that the cement product is unqualified, and when there is no damage or depression, it indicates that the cement product is a qualified product.

[0054] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to some parts by those skilled in the art of this technology all reflect the principles of the present invention and are within the protection scope of the present invention.

Claims

1. A cement hardness testing machine, comprising a base (1), an L-shaped bracket (2), a detection baffle (3), a protective box (4), a support base (5), and a gas supply base (6), characterized in that, The detection baffle is located above the base, an L-shaped bracket is connected between the base and the detection baffle, the protection box is installed on the detection baffle, the support base is located between the detection baffle and the base, and the air supply base is located inside the protection box; A cylinder hole (7) is formed in the detection baffle, the cylinder holes are evenly distributed in an equilateral triangle, a high-pressure cylinder (8) is installed in the cylinder hole, a cylinder piston (9) is movably installed inside the high-pressure cylinder, a cylinder rod (10) is installed at the lower end of the cylinder piston, a hardness detection plate (11) is installed at the lower end of the cylinder rod, the lengths of the cylinder rods form an arithmetic progression and gradually decrease, and the cylinder rod at the center of the detection baffle has the longest length; A number of conical grooves (12) are formed in the air supply base, the conical grooves correspond to the positions of the high-pressure cylinders, a connecting air pipe (13) is installed between the conical grooves and the high-pressure cylinders, a pressure sensor I (14) is installed on the connecting air pipes corresponding to the high-pressure cylinders at the longest and shortest lengths of the cylinder rods, a sealing box (15) is installed on the upper surface of the air supply base, an electric push rod (16) is installed at the center of the upper surface inside the sealing box, a sealing baffle (17) is installed at the telescopic end of the electric push rod, a number of sealing cylinders (18) are installed on the lower surface of the sealing baffle, a conical sealing seat (19) is installed at the lower end of the sealing cylinder, the conical sealing seat is movably inserted into the conical groove, and the sealing cylinder and the conical sealing seat are sealed with the conical groove through a sealing gasket (20).

2. The cement hardness detector according to claim 1, wherein, A hydraulic cylinder (21) is installed between the support base and the base, the hydraulic cylinders are located at the four corners below the support base, a fixed groove (22) is formed on the upper surface of the support base, a number of strip-shaped through grooves (23) are formed on the lower surface of the fixed groove, the strip-shaped through grooves are evenly distributed in the fixed groove, a number of strip-shaped support columns (24) are installed on the upper surface of the base, the strip-shaped support columns are movably inserted into the strip-shaped through grooves, and support rollers (25) are installed at the upper ends of the strip-shaped support columns.

3. A cement hardness tester according to claim 1, characterized in that, An upper baffle (26) is installed below the outer surface of the cylinder rod, a sliding sleeve (27) is sleeved below the outer surface of the cylinder rod, a lower baffle (28) is installed at the lower end of the outer surface of the sliding sleeve, a conical protective cover (29) is installed on the lower baffle, a compression spring (30) is arranged between the upper baffle and the lower baffle, and the compression spring is sleeved on the sliding sleeve and the cylinder rod.

4. A cement hardness tester according to claim 1, characterized in that, A pressure sensor II (31) is installed on one side of the upper surface of the sealing box, an exhaust pipe (32) is installed on the other side of the upper surface of the sealing box, an exhaust solenoid valve (33) is installed on the exhaust pipe, a charging pipe (34) is installed on one side surface of the sealing box, and a charging solenoid valve (35) is installed on the charging pipe.

5. The cement hardness tester according to claim 2, characterized in that, When the hydraulic cylinder is fully retracted, the strip-shaped support column extends out of the fixed groove, and when the hydraulic cylinder extends by a fixed length, the support roller fully retracts into the strip-shaped through groove.

6. The cement hardness tester according to claim 1, characterized in that, The initial air pressures inside all the high-pressure cylinders on the detection baffle are the same.

7. A cement hardness testing machine according to claim 1, characterized in that, A detection comparison nameplate (36) is installed on the L-shaped bracket, a pressure and hardness comparison table is engraved on the detection comparison nameplate, and the pressure range values inside the high-pressure cylinders are marked on the pressure and hardness comparison table.

8. A cement hardness tester according to claim 1, characterized in that, When the high-pressure cylinder is not in use, the internal air pressure is normal pressure.

9. A cement hardness tester according to claims 2 and 3, characterized in that, The distance between the conical protective cover at the lowermost end and the supporting roller is greater than the thickness of the cement product.

10. A cement hardness detector according to claims 1 and 3, characterized in that, After the conical protective cover shrinks, the hardness detection plate extends out of the conical protective cover.

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