CN217738944U

CN217738944U - Concrete permeameter

Info

Publication number: CN217738944U
Application number: CN202221267801.0U
Authority: CN
Inventors: 林群; 符传健; 王咸贵
Original assignee: China Inspection Union Hainan Testing Technology Co ltd
Current assignee: China Inspection Union Hainan Testing Technology Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-11-04
Anticipated expiration: 2032-05-25

Abstract

The utility model discloses a concrete permeameter belongs to concrete detection technical field. The utility model provides a concrete permeameter, includes the support frame, detects platform and pressurization bucket, and the periphery of pressurization bucket is provided with a plurality of guiding orientation mechanism, and guiding orientation mechanism includes guide bar, slide, dashpot and prevents breaking away from the part, is provided with the spring bolt part in the dashpot. The utility model discloses a setting of spring bolt part, guide bar and slide can make the layer board shrink in accomodating the inslot side after pushing down the pressurization bucket, and the slide can offset the influence of first spring resilience force to the pressurization bucket by oneself under the tongue part operation, through the setting of anticreep part, can implement spacing effect to the slide on the guide bar end.

Description

Concrete permeameter

Technical Field

The utility model belongs to the technical field of the concrete detection, concretely relates to concrete permeameter.

Background

The concrete permeameter is used for detecting the permeability coefficient of concrete, and when the concrete permeameter is used, water in the water tank is conveyed to a sample position in the sleeve of the test piece through the water pump, so that the permeability coefficient of the sample is detected.

A concrete permeameter that bulletin number is CN209264516U among the prior art, the layer board that this patent set up can be after detecting the completion, upwards ejecting the concrete piece, makes things convenient for the experimenter to take the concrete piece that detects the completion, and the right clamp splice of setting can be fixed the graduated flask, can guarantee that the graduated flask can not empty, and conveniently takes the graduated flask, but this patent has following problem in actual operation:

(1) although the first spring is utilized to above-mentioned patent, be convenient for accomplish the concrete and detect the back, utilize first spring resilience force, make the layer board upwards ejecting with the concrete from the fixed disk inboard, otherwise when pushing down the pressurization bucket and making the layer board drive concrete shrink fixed disk inboard, first spring can form ascending resilience force to the layer board all the time, so that twist the in-process of changeing the fixed pressurization bucket of bolt, need additionally to use more manpower, compress tightly the pressurization bucket, realize the firm effect of pressurization bucket, it is very inconvenient to operate.

(2) Lack the limit structure's to the pressurization bucket setting in the above-mentioned patent, accomplish the detection at the concrete, twist to change the bolt and remove when fixing the effect to the pressurization bucket, first spring can become to launch the effect in the twinkling of an eye that the fixed effect of pressurization bucket was removed, can lead to the pressurization bucket to throw away from the mesa seriously, influences secondary result of use.

Therefore, a concrete permeameter is needed, solve the concrete permeameter that exists among the prior art when using fixed pressurization bucket, first spring can form ascending resilience force to the layer board all the time, so that at the fixed in-process that pressurizes the bucket of twisting the bolt, need additionally use more manpower to compress tightly the pressurization bucket, the operation is inconvenient, and when twisting the bolt and relieving the fixed effect to the pressurization bucket, first spring can be in the twinkling of an eye that the fixed effect of pressurization bucket was relieved, to the barrel-shaped effect of launching of pressurization, can lead to the problem that the pressurization bucket was thrown away from the mesa seriously.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a concrete permeameter to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a concrete permeameter comprises a support frame, a detection platform fixed at the top of the support frame and a pressurizing barrel with one end opening movably arranged above the detection platform, wherein a supporting plate is arranged between the pressurizing barrel and the detection platform, a cement block is clamped on the inner side of the supporting plate, the opening end of the pressurizing barrel is tightly attached to the top surface of the cement block, an accommodating groove for accommodating the supporting plate is formed in the top surface of the detection platform, a permeation tube is vertically arranged in the accommodating groove, one end of the permeation tube is fixedly connected with the supporting plate, the other end of the permeation tube penetrates into the inner side of the support frame, a first spring is sleeved on a tube body of the permeation tube positioned on the inner side of the accommodating groove, a water tube is fixed at the top of the pressurizing barrel, a liquid outlet end of the water tube penetrates into the inner side of the pressurizing barrel, and a plurality of guiding and positioning mechanisms are arranged on the periphery of the pressurizing barrel;

the guide positioning mechanism comprises a guide rod vertically fixed on the top surface of the detection table, a sliding seat connected to the guide rod body in a sliding mode, a buffer groove formed in the inner wall of the sliding seat and an anti-separation part arranged at the tail end of the guide rod, wherein a spring bolt part is arranged in the buffer groove, and the sliding seat is fixedly connected with the outer wall of the pressurization barrel.

According to the scheme, the bolt part comprises a locking block arranged at the opening end of the buffer groove in a sliding manner, a push-pull plate movably arranged in the inner side of the buffer groove and an engagement groove vertically arranged on the rod body of the guide rod, a toothed plate engaged with the locking block is fixedly connected to the innermost inner wall of the engagement groove, two telescopic rods are fixedly arranged between one end, away from the toothed plate, of the engagement groove and the push-pull plate, a second spring is arranged between the two telescopic rods, one end of the second spring is fixedly connected with the locking block, and the other end of the second spring is fixedly connected with the push-pull plate.

It is further worth to say that a screw rod is rotatably connected to one surface, far away from the push-pull plate, of the push-pull plate, and a screw thread at the tail end of the screw rod penetrates through the sliding seat and is connected with a screw cap.

It should be further noted that the separation-preventing component includes a movable groove formed around the guide bar body and a movable ring rotatably disposed inside the movable groove, two positioning blocks are symmetrically disposed on the outer wall of the movable ring, and positioning grooves having shapes complementary to those of the positioning blocks are symmetrically disposed on the opening of the top surface of the sliding seat.

In a preferred embodiment, the locking block is in a shape of a right trapezoid with a downward inclined surface, and the teeth of the toothed plate and the locking block are in contact with each other.

As a preferred embodiment, a rubber layer is glued and connected to the inner wall of the movable ring, and the rubber layer is attached to the inner ring wall of the movable groove.

As a preferred embodiment, the outer wall of the nut is glued and connected with a non-slip mat, and the outer wall of the non-slip mat is provided with a non-slip groove.

Compared with the prior art, the utility model provides a concrete permeameter has following beneficial effect:

(1) The utility model discloses a spring bolt part, the setting of guide bar and slide, wherein the guide bar cooperatees with the slide, can be at the in-process that the pressurization bucket pushed down, inject the removal orbit of pressurization bucket, stationarity when guaranteeing the pressurization bucket displacement, and the pressurization bucket makes the layer board shrink in accomodate inslot side back pushing down, but the slide can lock tongue part operation down, automatically with the slide in the fixed linking to each other of guide bar, offset the influence of first spring resilience power to the pressurization bucket by oneself, make things convenient for manual operation.

(2) The utility model discloses a spacing effect can be implemented to the slide to the setting of anticreep part on the guide bar end to when fixed effect is relieved at the pressurization bucket, the pressurization bucket receives the influence of first spring resilience force, launches by oneself, throws away from on examining test table, influences the secondary and uses.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic structural view of the guiding and positioning mechanism of the present invention;

FIG. 4 is a schematic view of the internal structure of the slide seat of the present invention;

fig. 5 is a schematic view of the separation structure of the guide rod and the movable ring of the present invention.

In the figure:

1. a support frame; 2. a detection table; 3. a storage groove; 4. a support plate; 5. a movable ring; 6. a movable groove; 7. a screw; 8. a first spring; 9. a cement block; 10. a pressurizing barrel; 11. a second spring; 12. a water pipe; 13. positioning a groove; 14. positioning a block; 15. a guide bar; 16. a slide base; 17. an engagement groove; 18. a toothed plate; 19. a buffer tank; 20. a locking block; 21. a push-pull plate; 22. a telescopic rod; 23. and (4) a permeation tube.

Detailed Description

The present invention will be further described with reference to the following examples.

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will combine the drawings of the embodiments of the present invention to clearly and completely describe the technical solution of the embodiments of the present invention, and obviously, the described embodiments are a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative labor are within the scope of the protection of the present invention based on the described embodiments of the present invention.

The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention. The condition in the embodiment can be further adjusted according to concrete condition the utility model discloses a it is right under the design prerequisite the utility model discloses a simple improvement of method all belongs to the utility model discloses the scope of claiming.

Please refer to fig. 1-5, the utility model provides a concrete permeameter, including support frame 1, the detection platform 2 and the uncovered activity of one end that are fixed in support frame 1 top set up in the pressurization bucket 10 that detects platform 2 top, be provided with layer board 4 between pressurization bucket 10 and the detection platform 2, and the inboard card of layer board 4 is equipped with cement block 9, the open end of pressurization bucket 10 passes through seal ring and closely laminates with cement block 9 top surface, set up the storage tank 3 that is used for holding layer board 4 on the top surface of detection platform 2, the vertical infiltration pipe 23 that is provided with in the storage tank 3, the one end of infiltration pipe 23 links to each other with layer board 4 is fixed, the other end of infiltration pipe 23 penetrates support frame 1 inboard, and be fixed with on the inner wall of support frame 1 bottom with the graduated flask that corresponds with infiltration pipe 23 in the figure, infiltration pipe 23 is located the pipe body of storage tank 3 inboard cover and is equipped with first spring 8, set up the liquid flow tank that is linked together with the pipe 23 inner chamber in the inner wall of layer board 4 bottom, pressurization bucket 10 top is fixed with water pipe 12, the liquid outlet end of water pipe penetrates the inboard of pressurization bucket 10, the peripheral of infiltration pipe 10 is provided with a plurality of guide bar and is located the peripheral guide bar that the slide 19 that the slide location mechanism fixes in the buffer bar 15 that the slide and the fixed on the fixed position the inner wall of buffer bar 16, the fixed rod that the slide bar that the fixed on the slide bar outer wall of the slide and the buffer bar 16, the fixed on the fixed position the slide bar, the slide bar 16, the slide bar that the fixed structure, the slide bar that the fixed structure, the top surface of the slide bar 16 and locate the fixed on the top surface of the fixed structure, the top surface of the slide bar 16, the slide bar 16.

Through the spring bolt part, the setting of guide bar 15 and slide 16, wherein guide bar 15 cooperatees with slide 16, can be at the in-process that pressurization bucket 10 pushed down, inject the removal orbit of pressurization bucket 10, the stationarity when guaranteeing pressurization bucket 10 displacement, and after pushing down pressurization bucket 10 and making layer board 4 shrink in accomodating groove 3 inboard, slide 16 can lock under the tongue piece operation, automatically with slide 16 in guide bar 15 fixed link to each other, the influence of the first spring 8 resilience force to pressurization bucket 10 is offset by oneself, make things convenient for manual operation, and through the setting of anticreep part, can implement spacing effect to slide 16 on guide bar 15 end, in order to avoid when pressurization bucket 10 removes fixed effect, pressurization bucket 10 is influenced by first spring 8 resilience force, launch by oneself, throw away from detecting platform 2, influence secondary use.

Further, as shown in fig. 3 and fig. 4, it is worth specifically describing that the latch component includes a locking block 20 slidably disposed at an open end of the buffer slot 19, a push-pull plate 21 movably disposed inside the buffer slot 19, and an engagement slot 17 vertically disposed on a shaft of the guide rod 15, a toothed plate 18 engaged with the locking block 20 is fixedly connected to an innermost inner wall of the engagement slot 17, two telescopic rods 22 are fixed between one end of the engagement slot 17 away from the toothed plate 18 and the push-pull plate 21, a second spring 11 is disposed between the two telescopic rods 22, one end of the second spring 11 is fixedly connected to the locking block 20, the other end of the second spring 11 is fixedly connected to the push-pull plate 21, the locking block 20 is in a right-angled ladder shape with an inclined surface facing downward, teeth of the toothed plate 18 are in the same shape as the locking block 20, and inclined surfaces of teeth of the toothed plate 18 are in contact with inclined surfaces of the locking block 20.

Through the arrangement of the locking block 20 which is in the shape of a right trapezoid with an inclined surface facing downwards and the toothed plate 18 which is in the same shape as the locking block 20, when the sliding seat 16 slides downwards on the rod body of the guide rod 15, the inclined surface of the locking block 20 can continuously abut against the inclined surface of the toothed plate 18 and can be passively extruded to contract towards the inner side of the buffer groove 19, so that the moving process of the sliding seat 16 is not hindered, and through the arrangement of the second spring 11 and the telescopic rods 22, the two telescopic rods 22 can play a role in guiding when the locking block 20 contracts towards the inner side of the buffer groove 19, so that the stability of the locking block 20 during displacement is ensured, the second spring 11 can deform along with the contraction process of the locking block 20 in real time, and by utilizing the resilience characteristic, when the sliding seat 16 slides to a specified position, the locking block 20 can automatically reset to be clamped between two teeth of the toothed plate 18, and the sliding seat 16 is fixed.

As further shown in fig. 4, it should be noted that a screw 7 is rotatably connected to a surface of the push-pull plate 21 away from the push-pull plate 21, and a terminal thread of the screw 7 penetrates through the sliding seat 16 and is connected to a nut.

Through the setting of screw rod 7, after accomplishing the detection of cement piece 9, through twisting screw rod 7 promptly for push-and-pull board 21 drives locking block 20 and shifts out from between two teeth of pinion rack 18, just releases the locking effect to slide 16, makes things convenient for layer board 4 ejecting cement piece 9 under the effect of first spring 8 resilience force.

Further as shown in fig. 3 and 5, it is worth specifically explaining that the separation-preventing component includes a movable groove 6 circumferentially opened on the shaft of the guide bar 15 and a movable ring 5 rotatably disposed inside the movable groove 6, two positioning blocks 14 are symmetrically disposed on the outer wall of the movable ring 5, and positioning grooves 13 having shapes complementary to those of the positioning blocks 14 are symmetrically disposed on the opening of the top surface of the slide 16.

Through the arrangement of the positioning block 14 and the positioning groove 13, after the slide base 16 is sleeved on the rod body of the guide rod 15, the movable ring 5 is twisted, and the position of the positioning block 14 is adjusted, so that the positioning block 14 does not correspond to the positioning groove 13, and the limiting effect can be provided for the process that the pressurizing barrel 10 is upwards displaced by the resilience force of the first spring 8.

The scheme has the following working processes: when the cement block tester is used, a cement block 9 to be tested can be placed inside the supporting plate 4 in advance, then the pressurizing barrel 10 is used, the sliding seat 16 on the pressurizing barrel 10 is aligned to slide into the rod body of the guide rod 15, the bottom end opening of the pressurizing barrel 10 is tightly attached to the surface of the cement block 9, then the pressurizing barrel 10 is pressed down, the supporting plate 4 is passively contracted towards the inner side of the accommodating groove 3, the first spring 8 is compressed in real time, the permeation tube 23 slides downwards, the liquid outlet end of the permeation tube penetrates into the measuring cylinder, the water tube 12 is externally connected with a water source, the water tube 12 continuously drips water on the cement block 9 from the inner side of the pressurizing barrel 10, the water infiltrated through the cement block 9 can drip into the measuring cylinder through the permeation tube 23, and a tester can determine whether the quality of the cement block 9 is qualified or not through the depth and the experimental time of the water in the measuring cylinder;

in the process of pressing down the pressurizing barrel 10, the sliding seat 16 can move up and down on the rod body of the guide rod 15 along with the movement of the pressurizing barrel 10 in real time, so that the inclined surface of the locking block 20 is abutted against teeth on the toothed plate 18 in real time, the locking block 20 is repeatedly extruded to contract towards the inner side of the buffer groove 19 and compress the second spring 11, when the liquid outlet end of the permeation tube 23 penetrates into the measuring cylinder, the locking block 20 can be automatically embedded between two teeth of the toothed plate 18 under the action of the resilience force of the second spring 11, the position of the sliding seat 16 on the rod body of the guide rod 15 is limited, the pressurizing barrel 10 is automatically fixed, the resilience acting force of the first spring 8 on the pressurizing barrel 10 is counteracted, and the stability of the pressurizing barrel 10 is ensured;

on the contrary, the screw 7 is simply twisted, so that the push-pull plate 21 drives the locking block 20 to move away from the toothed plate 18, the locking block 20 can move out of the space between the two teeth of the toothed plate 18, the sliding seat 16 is locked by contact, and the cement block 9 can be conveniently ejected out by the support plate 4 under the resilience force of the first spring 8;

in addition, when the slide 16 is sleeved on the rod body of the guide rod 15, the movable ring 5 can be twisted in advance, so that the two positioning blocks 14 on the outer wall of the movable ring 5 are adjusted to the positions corresponding to the two positioning grooves 13 on the slide 16, namely, when the slide 16 is sleeved, the positioning blocks 14 keep fixedly penetrating through the positioning grooves 13, the process of sleeving the slide 16 is not hindered, after the slide 16 completely slides into the rod body of the guide rod 15, namely, the movable ring 5 is reversely twisted, the two positioning blocks 14 are adjusted to the positions not corresponding to the two positioning grooves 13, a limiting effect can be provided for the process that the pressurizing barrel 10 is upwards displaced by the resilience force of the first spring 8, the pressurizing barrel 10 is prevented from being directly thrown away, damage is caused, and the secondary use effect is influenced.

According to the working process, the following steps are known: through the arrangement of the guide rod 15 and the sliding seat 16, the moving track of the pressurizing barrel 10 can be limited in the process of pressing down the pressurizing barrel 10, the locking block 20 in the shape of a downward right-angle trapezoid with an inclined plane and the toothed plate 18 in the same shape as the locking block 20 are arranged, the sliding seat 16 can be prevented from blocking the movement of the sliding seat 16 in the process of sliding down the rod body of the guide rod 15 by the sliding seat 16, when the sliding seat 16 slides to a specified position, the locking block 20 can be automatically reset and clamped between two teeth of the toothed plate 18 under the resilience characteristic of the second spring 11, the sliding seat 16 is fixed, through the arrangement of the screw 7, the locking effect on the sliding seat 16 is released, the cement block 9 can be conveniently ejected out by the support plate 4 under the effect of the resilience force of the first spring 8, and through the arrangement of the positioning block 14 and the positioning groove 13, a limiting effect can be provided for the process of upward displacement of the pressurizing barrel 10 under the resilience force of the first spring 8.

Further, as shown in fig. 5, it is worth specifically explaining that a rubber layer is bonded to the inner wall of the movable ring 5, and the rubber layer is attached to the inner wall of the movable groove 6.

Through the setting of rubber layer, can accomplish the back of adjusting at activity ring 5, strengthen the steadiness of activity ring 5 in activity 6 inboard.

Further, as shown in fig. 4, it is worth concretely explaining that an anti-slip pad is bonded and connected on the outer wall of the nut, and an anti-slip groove is formed on the outer wall of the anti-slip pad.

Through the setting of slipmat on the nut, can increase the frictional force between personnel's hand and the nut when personnel twist reverse screw rod 7, avoid producing the slippage.

To sum up: through the setting of guide bar 15 and slide 16, can be in the in-process that pressurization bucket 10 pushed down, inject the moving trajectory of pressurization bucket 10, through being the inclined plane down the locking piece 20 of right angle trapezoidal form and the setting of pinion rack 18 the same with locking piece 20 shape, can be in slide 16 in the in-process that the guide bar 15 pole body glides, do not cause the hindrance to the activity of slide 16, when slide 16 slided to the assigned position, locking piece 20 alright under second spring 11 resilience characteristic, the card of reseing by oneself is established between two tooth teeth among them of pinion rack 18, fixed slide 16, through the setting of screw 7, just remove the locking effect to slide 16, make things convenient for layer board 4 to push out cement piece 9 under the effect of first spring 8 resilience force, through the setting of locating piece 14 and constant head tank 13, can provide limiting effect to the process that pressurization bucket 10 received first spring 8 resilience force upwards displacement, through the setting of rubber layer, strengthen the steadiness of movable ring 5 in the inboard of movable chute 6, through the setting of non-slip mat on the nut, can be when personnel twist reverse screw 7, increase the friction force between personnel and the nut.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art, and the use of the term "including" or "comprising" in the present application shall mean that the element or item preceding the term covers the element or item listed after the term and its equivalents, but does not exclude other elements or items, and the term "connected" or "connected" is not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect, "upper", "lower", "left", "right", etc. merely indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may be changed accordingly.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The concrete permeameter comprises a support frame (1), a detection platform (2) fixed at the top of the support frame (1) and a pressurizing barrel (10) with one end open and movably arranged above the detection platform (2), and is characterized in that a supporting plate (4) is arranged between the pressurizing barrel (10) and the detection platform (2), a cement block (9) is clamped on the inner side of the supporting plate (4), the open end of the pressurizing barrel (10) is tightly attached to the top surface of the cement block (9), a containing groove (3) for containing the supporting plate (4) is formed in the top surface of the detection platform (2), a permeation tube (23) is vertically arranged in the containing groove (3), one end of the permeation tube (23) is fixedly connected with the supporting plate (4), the other end of the permeation tube (23) penetrates into the inner side of the support frame (1), a first spring (8) is sleeved on a tube body of the permeation tube (23) positioned on the inner side of the containing groove (3), a water pipe (12) is fixed at the top of the pressurizing barrel (10), and a plurality of pressurizing barrel guiding mechanisms are arranged at the pressurizing barrel (10);

the guide positioning mechanism comprises a guide rod (15) vertically fixed on the top surface of the detection table (2), a sliding seat (16) slidably connected to the rod body of the guide rod (15), a buffer groove (19) formed in the inner wall of the slide seat (16) and a separation-preventing component arranged at the tail end of the guide rod (15), wherein a bolt component is arranged in the buffer groove (19), and the slide seat (16) is fixedly connected with the outer wall of the pressurization barrel (10).

2. A concrete penetrometer as claimed in claim 1, characterized in that: the spring bolt part including slide set up in locking piece (20), mobile set up in of buffer slot (19) opening end push-and-pull plate (21) and vertical seting up in buffer slot (19) inboard mesh groove (17) on guide bar (15) pole body, the rigid coupling has on the innermost inner wall of mesh groove (17) with pinion rack (18) that locking piece (20) meshed mutually, mesh groove (17) are kept away from the one end of pinion rack (18) with be fixed with two telescopic links (22) between push-and-pull plate (21), and two be provided with second spring (11) between telescopic link (22), the one end of second spring (11) with locking piece (20) looks rigid coupling, the other end of second spring (11) with push-and-pull plate (21) looks rigid coupling.

3. A concrete penetrometer as claimed in claim 2, characterized in that: and a screw rod (7) is rotatably connected to one surface of the push-pull plate (21) far away from the push-pull plate (21), and the tail end thread of the screw rod (7) penetrates through the sliding seat (16) and is connected with a screw cap.

4. A concrete penetrometer as claimed in claim 1, characterized in that: the anti-separation part comprises a movable groove (6) formed in the body of the guide rod (15) in a surrounding mode and a movable ring (5) arranged on the inner side of the movable groove (6) in a rotating mode, two positioning blocks (14) are symmetrically arranged on the outer wall of the movable ring (5), and positioning grooves (13) complementary to the positioning blocks (14) in shape are symmetrically formed in an opening in the top face of the sliding seat (16).

5. A concrete penetrometer as claimed in claim 2, characterized in that: the locking block (20) is in a right-angle trapezoidal shape with a downward inclined surface, the teeth of the toothed plate (18) are the same as the locking block (20), and the inclined surface of the teeth of the toothed plate (18) is in contact with the inclined surface of the locking block (20).

6. A concrete penetrometer as claimed in claim 4, characterized in that: the rubber layer is connected to the inner wall of the movable ring (5) in a gluing mode, and the rubber layer is attached to the inner ring wall of the movable groove (6).

7. A concrete penetrometer as claimed in claim 3, characterized in that: the outer wall of the nut is connected with an anti-slip pad in a gluing mode, and the outer wall of the anti-slip pad is provided with an anti-slip groove.