Novel concrete mixture gas content detection equipment

Abstract

The utility model discloses novel concrete mixture gas content detection equipment, belongs to the technical field of concrete detection, and aims to solve the problems that a contact surface is polluted by concrete in a measuring bowl and the sealing performance of an existing concrete gas content tester cannot be ensured due to the fact that the existing concrete gas content tester moves due to deviation in a bowl cover sealing process. The device comprises a measuring bowl and a bowl cover, and further comprises a guide unit and a base unit, the guide unit is arranged at the top of the base unit, the bottom of the guide unit is fixedly connected with the base unit, the measuring bowl is arranged in the guide unit, the bottom of the measuring bowl is detachably connected with the top of the base unit, and the bowl cover is arranged at the top of the measuring bowl. The bowl cover is correspondingly matched with the opening of the measuring bowl through the guide unit, and the measuring bowl is detachably connected with the bowl cover. The device is mainly used for detecting the gas content of the concrete mixture.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete detection, and specifically relates to a novel concrete mixture air content detection device. Background Art

[0002] The concrete air content meter is a special device used to measure the gas content in concrete. It is mainly used to accurately evaluate the performance and quality of concrete, guide the mix design and construction process of concrete, and ensure the safety, reliability and durability of concrete structures. By measuring the gas content in concrete, problems in concrete can be discovered and solved in a timely manner, and the comprehensive performance and service life of concrete can be improved. The air content of concrete is usually tested by air content detection equipment.

[0003] Before testing the air content, the concrete mixture to be tested needs to be loaded into the measuring bowl. After loading, the surface where the outer edge of the top of the measuring bowl contacts the bowl cover needs to be cleaned to ensure the sealing between the measuring bowl and the bowl cover. However, even if it is cleaned, the bowl cover may move due to displacement during the sealing process, causing the concrete in the measuring bowl to contaminate the contact surface, making it impossible to ensure the sealing, thus causing deviations in the test results. In addition, the concrete air content detection equipment needs to face floors of different flatness, which makes it difficult to smooth the surface when loading concrete into the measuring bowl, and it is impossible to ensure that the surface of the concrete and the surface of the measuring bowl are on the same level, thereby reducing the detection accuracy of the equipment. Therefore, a new type of concrete mixture air content detection equipment is proposed to solve the above-mentioned problems. Utility Model Content

[0004] The utility model aims to solve the problem that the existing concrete air content measuring instrument has a bowl cover that moves due to deviation during sealing, causing the concrete in the bowl to contaminate the contact surface, resulting in the inability to ensure the sealing of the measuring instrument, and thus provides a new concrete mixture air content detection device;

[0005] A novel concrete mixture air content detection device comprises a measuring bowl and a bowl cover, and also comprises a guide unit and a base unit, wherein the guide unit is arranged on the top of the base unit, and the bottom of the guide unit is fixedly connected to the base unit, the measuring bowl is arranged in the guide unit, and the bottom of the measuring bowl is detachably connected to the top of the base unit, the bowl cover is arranged on the top of the measuring bowl, and the bowl cover is arranged correspondingly with the opening of the measuring bowl through the guide unit, and the measuring bowl and the bowl cover are detachably connected;

[0006] Further, the base unit includes a base plate, a level, a measuring bowl fixing assembly and four chassis height adjustment assemblies, the level is installed at the edge of the top of the base plate by screws, the measuring bowl fixing assembly is fixedly connected to the top center of the base plate, the four chassis height adjustment assemblies are correspondingly installed at the four corners of the base plate, and the control end of each chassis height adjustment assembly is located above the base plate, the adjustment end of each chassis height adjustment assembly passes through the base plate and is located below the base plate, the measuring bowl is detachably connected to the base plate through the measuring bowl fixing assembly, the guide unit is arranged on the outside of the measuring bowl fixing assembly, and the bottom of the guide unit is fixedly connected to the top of the base plate;

[0007] Furthermore, the measuring bowl fixing assembly includes a bottom ring and a clamping mechanism, the bottom ring is an open ring, a closed portion of the bottom ring corresponding to the opening is fixedly connected to the bottom plate through an extended plate body strip, a clamping mechanism is provided at the opening of the bottom ring, and the bottom ring is clamped to the lower part of the measuring bowl through the clamping mechanism;

[0008] Furthermore, the clamping mechanism includes a hook, a movable hanging rod and a control handle, the hook is fixedly connected to the outer wall of one end of the bottom ring opening, the movable hanging rod is fixedly connected to the outer wall of the other end of the bottom ring opening, the control handle is hinged on the movable hanging rod, and the control handle drives the movable hanging rod to be hung on the hook to achieve the opening of the bottom ring being clamped on the lower part of the measuring bowl;

[0009] Further, the chassis height adjustment assembly includes a foundation bolt and a grounding rubber sleeve, the foundation bolt is inserted on the bottom plate, and the threaded section of the foundation bolt passes through the bottom plate and extends to the bottom of the bottom plate, the bolt head of the foundation bolt is retained above the bottom plate, the foundation bolt is threadedly connected to the bottom plate, the grounding rubber sleeve is sleeved on the end of the threaded section of the foundation bolt, and the foundation bolt is in contact with the ground through the grounding rubber sleeve;

[0010] Further, the guide unit comprises an outer hoop ring, an inner hoop ring and N guide assemblies, N is a positive integer, the N guide assemblies are equidistantly arranged around the outside of the bottom ring along the circumferential direction, and the bottom of each guide assembly is fixedly connected to the top of the bottom plate, the outer hoop ring is sleeved on the outside of the N guide assemblies, the inner hoop ring is arranged on the inside of the N guide assemblies, and the inner hoop ring is located below the outer hoop ring, the outer hoop ring, the inner hoop ring and the bottom ring are coaxially arranged, and the N guide assemblies are limited by the cooperation of the outer hoop ring and the inner hoop ring;

[0011] Furthermore, the value range of N is 3 to 5;

[0012] Further, the guide assembly includes a guide rod, a limit plate, a connecting block and a guide block, the guide rod is arranged on the top of the bottom plate in the vertical direction, and the bottom of the guide rod is fixedly connected to the bottom plate, the limit plate is fixedly connected to the outer circumferential surface of the upper part of the guide rod through the connecting block, and the limit plate is arranged toward the axis of the bottom ring, the limit surface of the limit plate is matched with the outer circumferential surface of the bowl cover, the guide block is fixedly connected to the top end of the guide rod, and a guide inclined surface is processed on one side of the guide block toward the axis of the bottom ring;

[0013] Further, a fixed support is provided at the lower part of the guide rod, and the fixed support includes a plurality of support plates, which are circumferentially arranged on the outer circumferential surface of the lower part of the guide rod, and the side of each support plate is fixedly connected to the guide rod, and the bottom of each support plate is fixedly connected to the bottom plate;

[0014] Furthermore, a cylindrical air chamber is provided on the top of the bowl cover, the axis of the cylindrical air chamber is arranged colinearly with the axis of the bowl cover, the bottom end of the cylindrical air chamber is connected to the bowl cover, a pressure balancing valve, a fine-tuning valve, an exhaust valve, a hand pump and a pressure gauge are installed on the top of the cylindrical air chamber, an inlet valve and an outlet valve are circumferentially arranged on the upper edge of the outer circumferential surface of the cylindrical air chamber, a plurality of clamping clips are equidistantly provided on the top of the bowl cover along the circumferential direction, a fixed end of each clamping clip is fixedly connected to the bowl cover, and the bowl cover is detachably connected to the measuring bowl through the plurality of clamping clips.

[0015] The beneficial effects of this application compared to the prior art are as follows:

[0016] 1. The utility model provides a new type of concrete mixture air content detection equipment. The level gauge on the bottom plate can measure the overall balance of the device under various working environments. If the device tilts due to uneven ground in the working area, the relative positions of the anchor bolts and the grounding rubber sleeves in the chassis height adjustment assembly can be adjusted to achieve the purpose of leveling the device, thereby avoiding the situation where the device tilts and affects the detection results.

[0017] 2. The utility model provides a new concrete mixture air content detection device. The measuring bowl can be fixed by a bottom ring and a clamp, which ensures the stability of the measuring bowl during operation to the greatest extent. Under the guidance and restriction of the guide rod and the limit plate, the bowl cover can be quickly and accurately dropped onto the measuring bowl, which ensures the sealing of the equipment and improves the equipment detection efficiency and test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the concrete mixture air content detection device of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection between the base and the guide structure in the concrete mixture air content detection device of the utility model;

[0020] Figure 3 It is a top view of the base and the guide structure of the concrete mixture air content detection device of the utility model;

[0021] In the figure: 1 measuring bowl, 2 bowl cover, 3 cylindrical air chamber, 4 pressure balance valve, 5 fine-adjustment valve, 6 exhaust valve, 7 hand pump, 8 pressure gauge, 9 water inlet valve, 10 water outlet valve, 11 clamping clamp, 12 guide rod, 13 limit plate, 14 outer hoop ring, 15 inner hoop ring, 16 fixed support, 17 bottom plate, 18 bottom ring, 19 clamping mechanism, 20 level, 21 anchor bolt, 22 support plate, 23 connecting block, 24 grounding rubber sleeve, 25 screw, 26 hook, 27 movable hanging rod, 28 control handle and 29 guide block. DETAILED DESCRIPTION

[0022] Specific implementation method 1: Combination Figures 1 to 3 The present embodiment is described. A novel concrete mixture air content detection device is provided in the present embodiment, including a measuring bowl 1 and a bowl cover 2, and also including a guide unit and a base unit. The guide unit is arranged at the top of the base unit, and the bottom of the guide unit is fixedly connected to the base unit. The measuring bowl 1 is arranged in the guide unit, and the bottom of the measuring bowl 1 is detachably connected to the top of the base unit. The bowl cover 2 is arranged at the top of the measuring bowl 1, and the bowl cover 2 is arranged to correspond to the opening of the measuring bowl 1 through the guide unit, and the measuring bowl 1 and the bowl cover 2 are detachably connected.

[0023] In the present embodiment, a novel concrete mixture air content detection device is proposed, in which the measuring bowl 1 can be fixed in position by the base unit to ensure the stability of the measuring bowl 1 during operation, and the falling trajectory of the bowl cover 2 can be constrained by the guide unit, and the guide unit can also limit the connection between the bowl cover 2 and the measuring bowl 1, so that the bowl cover 2 can fall onto the measuring bowl 1 quickly and accurately, thereby ensuring the sealing of the equipment and improving the equipment detection efficiency and test accuracy.

[0024] Specific implementation method 2: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the first embodiment is that the base unit includes a bottom plate 17, a level 20, a measuring bowl fixing assembly and four chassis height adjustment assemblies. The level 20 is mounted on the edge of the top of the bottom plate 17 by screws 25. The measuring bowl fixing assembly is fixedly connected to the top center of the bottom plate 17. The four chassis height adjustment assemblies are correspondingly mounted at the four corners of the bottom plate 17, and the control end of each chassis height adjustment assembly is located above the bottom plate 17. The adjustment end of each chassis height adjustment assembly passes through the bottom plate 17 and is located below the bottom plate 17. The measuring bowl 1 is detachably connected to the bottom plate 17 through the measuring bowl fixing assembly. The guide unit is arranged on the outside of the measuring bowl fixing assembly, and the bottom of the guide unit is fixedly connected to the top of the bottom plate 17. Other components and connection methods are the same as those of the first embodiment.

[0025] In this embodiment, the level 20 can be used to verify whether the base plate 17 is in a horizontal state. If the base plate 17 is in a non-horizontal state, the base plate 17 can be made horizontal by adjusting the chassis height adjustment component. The measuring bowl fixing component is used to fix the measuring bowl 1 to ensure the stability of the measuring bowl 1 during operation.

[0026] Specific implementation method three: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the second embodiment is that the measuring bowl fixing assembly includes a bottom ring 18 and a clamping mechanism 19. The bottom ring 18 is an open ring. The closed part of the bottom ring 18 corresponding to the opening is fixedly connected to the bottom plate 17 through an extended plate body strip. The opening of the bottom ring 18 is provided with a clamping mechanism 19. The bottom ring 18 is clamped to the lower part of the measuring bowl 1 through the clamping mechanism 19. Other components and connection methods are the same as those of the second embodiment.

[0027] In the present embodiment, the bottom ring 18 is an open ring adapted to the measuring bowl 1. When the measuring bowl 1 is placed in the bottom ring 18, the bottom ring 18 is fastened to the bottom of the measuring bowl 1 by the clamping mechanism 19 for fixation. The extended plate strip is arranged between the bottom ring 18 and the bottom plate 17. The thickness of the extended plate strip does not exceed 1 / 5 of the height of the bottom ring 18. The extended plate strip is only used to create a gap between the bottom ring 18 and the bottom plate 17 so that there will be no interference at the opening of the bottom ring 18 when locking.

[0028] Specific implementation method four: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the third embodiment is that the clamping mechanism 19 includes a hook 26, a movable hanging rod 27 and a control handle 28. The hook 26 is fixed to the outer wall of one end of the opening of the bottom ring 18, the movable hanging rod 27 is fixed to the outer wall of the other end of the opening of the bottom ring 18, and the control handle 28 is hinged on the movable hanging rod 27. The control handle 28 drives the movable hanging rod 27 to be hung on the hook 26 to achieve the opening of the bottom ring 18 being clamped on the lower part of the measuring bowl 1. Other components and connection methods are the same as those of the third embodiment.

[0029] In this embodiment, a torsion spring is provided at the connection between the control handle 28 and the movable hanging rod 27. When the control handle 28 drives the movable hanging rod 27 to be hung on the hook 26, the movable hanging rod 27 will remain in the hanging state under the elastic force constraint of the torsion spring, so that the clamping mechanism 19 drives the opening of the bottom ring 18 to close and clamp the measuring bowl 1.

[0030] Specific implementation method five: Combination Figures 1 to 3This embodiment is described. The difference between this embodiment and the fourth embodiment is that the chassis height adjustment assembly includes a foundation bolt 21 and a grounding rubber sleeve 24. The foundation bolt 21 is inserted on the bottom plate 17, and the threaded section of the foundation bolt 21 passes through the bottom plate 17 and extends to the bottom of the bottom plate 17. The bolt head of the foundation bolt 21 is retained above the bottom plate 17. The foundation bolt 21 is threadedly connected to the bottom plate 17. The grounding rubber sleeve 24 is sleeved on the end of the threaded section of the foundation bolt 21, and the foundation bolt 21 is in contact with the ground through the grounding rubber sleeve 24. Other components and connection methods are the same as those of the fourth embodiment.

[0031] In this embodiment, by screwing the extension distance of the anchor bolts 21 relative to the bottom plate 17, the corresponding heights at the four corners of the bottom plate 17 can be adjusted, thereby achieving horizontal adjustment of the device.

[0032] Specific implementation method six: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the fifth embodiment is that the guide unit includes an outer hoop ring 14, an inner hoop ring 15 and N guide components, N is a positive integer, the N guide components are equidistantly surrounded on the outside of the bottom ring 18 along the circumferential direction, and the bottom of each guide component is fixedly connected to the top of the bottom plate 17, the outer hoop ring 14 is sleeved on the outside of the N guide components, the inner hoop ring 15 is arranged on the inside of the N guide components, and the inner hoop ring 15 is located below the outer hoop ring 14, the outer hoop ring 14, the inner hoop ring 15 and the bottom ring 18 are coaxially arranged, and the N guide components are limited by the cooperation of the outer hoop ring 14 and the inner hoop ring 15. Other components and connection methods are the same as those of the fifth embodiment.

[0033] Specific implementation method seven: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the sixth embodiment is that the value range of N is 3 to 5. The other components and connection methods are the same as those of the fifth embodiment.

[0034] Specific implementation method eight: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the seventh embodiment is that the guide assembly includes a guide rod 12, a limit plate 13, a connecting block 23 and a guide block 29. The guide rod 12 is arranged on the top of the bottom plate 17 in the vertical direction, and the bottom of the guide rod 12 is fixedly connected to the bottom plate 17. The limit plate 13 is fixedly connected to the outer circumferential surface of the upper part of the guide rod 12 through the connecting block 23, and the limit plate 13 is arranged toward the axis of the bottom ring 18. The limit surface of the limit plate 13 is matched with the outer circumferential surface of the bowl cover 2. The guide block 29 is fixedly connected to the top of the guide rod 12, and the guide block 29 is processed with a guide inclined surface on one side facing the axis of the bottom ring 18. Other components and connection methods are the same as those of the fifth embodiment.

[0035] Specific implementation method nine: Combination Figures 1 to 3This embodiment is described. This embodiment is different from the eighth embodiment in that a fixed support 16 is provided at the lower portion of the guide rod 12. The fixed support 16 includes a plurality of support plates 22. The plurality of support plates 22 are circumferentially arranged on the outer circumferential surface of the lower portion of the guide rod 12. The side of each support plate 22 is fixedly connected to the guide rod 12, and the bottom of each support plate 22 is fixedly connected to the bottom plate 17. Other components and connection methods are the same as those of the eighth embodiment.

[0036] In combination with the description of specific embodiments six to nine, the N guide assemblies are tensioned and limited by the outer hoop 14 and the inner hoop 15 to ensure the stability of the guide rod 12 during operation. The fixed support 16 is used to reinforce the bottom of the guide rod 12, thereby improving the supporting strength of the guide rod 12. The guide rod 12 in the guide assembly plays the main role of supporting the connecting block 23 and the limiting plate 13. The limiting plate 13 is arranged at the connection between the measuring bowl 1 and the bowl cover 2, and can be constrained when the measuring bowl 1 and the bowl cover 2 are sealed to ensure the docking accuracy of the measuring bowl 1 and the bowl cover 2. The limiting plate 13 is mainly used to constrain the falling trajectory of the bowl cover 2, so that the bowl cover 2 can fall quickly and accurately to the top of the measuring bowl 1.

[0037] Specific implementation method ten: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the ninth embodiment is that a cylindrical air chamber 3 is provided on the top of the bowl cover 2. The axis of the cylindrical air chamber 3 is arranged in a colinear manner with the axis of the bowl cover 2. The bottom end of the cylindrical air chamber 3 is connected to the bowl cover 2. A pressure balance valve 4, a fine-tuning valve 5, an exhaust valve 6, a hand pump 7 and a pressure gauge 8 are installed on the top of the cylindrical air chamber 3. An inlet valve 9 and an outlet valve 10 are arranged relatively along the circumferential direction on the outer circumference of the cylindrical air chamber 3. A plurality of clamping clips 11 are equidistantly arranged on the top of the bowl cover 2 along the circumferential direction. The fixed end of each clamping clip 11 is fixedly connected to the bowl cover 2. The bowl cover 2 is detachably connected to the measuring bowl 1 through the plurality of clamping clips 11. Other components and connection methods are the same as those of the ninth embodiment.

[0038] The present invention has been disclosed as above with preferred implementation cases, but it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent implementation cases with equivalent changes by using the above-disclosed structures and technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above implementation cases based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

[0039] How it works

[0040] When the present application is working, firstly, the base plate 17 is placed in the designated position, and then the level 20 is used to determine whether it is horizontal. If the base plate 17 is in an inclined state, the relative positions of the anchor bolts 21 and the grounding rubber sleeves 24 in the chassis height adjustment assembly are adjusted until the level bubble appears in the middle of the level 20. At this time, the base plate 17 is in a horizontal state, and then the measuring bowl 1 is installed in the bottom ring 18, and the position of the measuring bowl 1 is fixed by the clamping mechanism 19 to ensure that the measuring bowl 1 is in a horizontal position during the entire test process and does not undergo relative displacement. Subsequently, concrete is poured, and after smoothing, the surface of the area where the measuring bowl 1 and the bowl cover 2 are in contact is cleaned, and the bowl cover 2 is vertically dropped along the guide rod 12, and under the action of the limit plate 13, it accurately contacts the upper surface of the measuring bowl 1 without deviation, and finally the measuring bowl 1 and the bowl cover 2 are sealed with the clamping clamp 11 to prevent the outside air from entering during the measurement process and affecting the detection accuracy.

Claims

1. A novel concrete mixture air content detection device, comprising a measuring bowl (1) and a bowl cover (2), characterized in that: The invention also comprises a guide unit and a base unit, wherein the guide unit is arranged at the top of the base unit, and the bottom of the guide unit is fixedly connected to the base unit, the measuring bowl (1) is arranged in the guide unit, and the bottom of the measuring bowl (1) is detachably connected to the top of the base unit, the bowl cover (2) is arranged at the top of the measuring bowl (1), and the bowl cover (2) is arranged correspondingly to the opening of the measuring bowl (1) through the guide unit, and the measuring bowl (1) and the bowl cover (2) are detachably connected.

2. A novel concrete mixture air content detection device according to claim 1, characterized in that: The base unit comprises a base plate (17), a level (20), a measuring bowl fixing assembly and four chassis height adjustment assemblies, wherein the level (20) is mounted at the edge of the top of the base plate (17) by means of screws (25), the measuring bowl fixing assembly is fixedly connected to the top center of the base plate (17), the four chassis height adjustment assemblies are correspondingly mounted at the four corners of the base plate (17), and the control end of each chassis height adjustment assembly is located above the base plate (17), and the adjustment end of each chassis height adjustment assembly passes through the base plate (17) and is located below the base plate (17), the measuring bowl (1) is detachably connected to the base plate (17) by means of the measuring bowl fixing assembly, and the guide unit is arranged on the outer side of the measuring bowl fixing assembly, and the bottom of the guide unit is fixedly connected to the top of the base plate (17).

3. A new concrete mixture air content detection device according to claim 2, characterized in that: The measuring bowl fixing assembly comprises a bottom ring (18) and a clamping mechanism (19), wherein the bottom ring (18) is an open ring, a closed portion of the bottom ring (18) corresponding to the opening is fixedly connected to the bottom plate (17) via an extended plate strip, and a clamping mechanism (19) is provided at the opening of the bottom ring (18), and the bottom ring (18) is clamped to the lower part of the measuring bowl (1) via the clamping mechanism (19).

4. A new concrete mixture air content detection device according to claim 3, characterized in that: The clamping mechanism (19) comprises a hook (26), a movable hanging rod (27) and a control handle (28), wherein the hook (26) is fixedly connected to the outer wall at one end of the opening of the bottom ring (18), the movable hanging rod (27) is fixedly connected to the outer wall at the other end of the opening of the bottom ring (18), the control handle (28) is hinged on the movable hanging rod (27), and the control handle (28) drives the movable hanging rod (27) to be hung on the hook (26) so as to clamp the opening of the bottom ring (18) on the lower part of the measuring bowl (1).

5. A novel concrete mixture air content detection device according to claim 4, characterized in that: The chassis height adjustment assembly comprises a foundation bolt (21) and a grounding rubber sleeve (24); the foundation bolt (21) is inserted on a base plate (17); a threaded section of the foundation bolt (21) passes through the base plate (17) and extends to the bottom of the base plate (17); a bolt head of the foundation bolt (21) is retained above the base plate (17); the foundation bolt (21) is threadedly connected to the base plate (17); the grounding rubber sleeve (24) is sleeved on the end of the threaded section of the foundation bolt (21); and the foundation bolt (21) contacts the ground through the grounding rubber sleeve (24).

6. A new concrete mixture air content detection device according to claim 5, characterized in that: The guide unit comprises an outer hoop ring (14), an inner hoop ring (15) and N guide components, N being a positive integer, the N guide components are equidistantly arranged around the outside of a bottom ring (18) along the circumferential direction, and the bottom of each guide component is fixedly connected to the top of a bottom plate (17), the outer hoop ring (14) is sleeved on the outside of the N guide components, the inner hoop ring (15) is arranged on the inside of the N guide components, and the inner hoop ring (15) is located below the outer hoop ring (14), the outer hoop ring (14), the inner hoop ring (15) and the bottom ring (18) are coaxially arranged, and the N guide components are limited by the cooperation of the outer hoop ring (14) and the inner hoop ring (15).

7. A novel concrete mixture air content detection device according to claim 6, characterized in that: The value range of N is 3 to 5.

8. A new concrete mixture air content detection device according to claim 7, characterized in that: The guide assembly comprises a guide rod (12), a limit plate (13), a connecting block (23) and a guide block (29). The guide rod (12) is arranged on the top of the bottom plate (17) in the vertical direction, and the bottom of the guide rod (12) is fixedly connected to the bottom plate (17). The limit plate (13) is fixedly connected to the outer circumferential surface of the upper part of the guide rod (12) through the connecting block (23), and the limit plate (13) is arranged toward the axis of the bottom ring (18). The limit surface of the limit plate (13) is matched with the outer circumferential surface of the bowl cover (2). The guide block (29) is fixedly connected to the top of the guide rod (12), and a guide inclined surface is processed on one side of the guide block (29) facing the axis of the bottom ring (18).

9. A novel concrete mixture air content detection device according to claim 8, characterized in that: A fixed support (16) is provided at the lower part of the guide rod (12), and the fixed support (16) includes a plurality of support plates (22). The plurality of support plates (22) are circumferentially arranged on the outer circumferential surface of the lower part of the guide rod (12), and the side of each support plate (22) is fixedly connected to the guide rod (12), and the bottom of each support plate (22) is fixedly connected to the bottom plate (17).

10. A novel concrete mixture air content detection device according to claim 9, characterized in that: A cylindrical air chamber (3) is provided on the top of the bowl cover (2), the axis of the cylindrical air chamber (3) is arranged colinearly with the axis of the bowl cover (2), the bottom end of the cylindrical air chamber (3) is arranged in communication with the bowl cover (2), a pressure balance valve (4), a fine adjustment valve (5), an exhaust valve (6), a hand pump (7) and a pressure gauge (8) are installed on the top of the cylindrical air chamber (3), a water inlet valve (9) and a water outlet valve (10) are arranged in a circumferential direction on the outer circumferential surface of the cylindrical air chamber (3), a plurality of clamping clips (11) are equidistantly provided on the top of the bowl cover (2) along the circumferential direction, a fixed end of each clamping clip (11) is fixedly connected to the bowl cover (2), and the bowl cover (2) is detachably connected to the measuring bowl (1) via the plurality of clamping clips (11).

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