CN219284946U

CN219284946U - Screen drum structure of concrete fineness negative pressure screen

Info

Publication number: CN219284946U
Application number: CN202223605025.3U
Authority: CN
Inventors: 蒋新龙
Original assignee: Zhejiang Tongxin Building Materials Co ltd
Current assignee: Zhejiang Tongxin Building Materials Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-30
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a screen cylinder structure of a concrete fineness negative pressure screen, which comprises a cylinder with two ends open, a screen mesh arranged at a first opening of the cylinder, and a first annular part arranged at a second opening of the cylinder and outwards; the moving block is sleeved in the cylinder and can move up and down relative to the cylinder; the magnet is fixedly connected to the annular end face of the moving block, which is close to the first annular part; the driving mechanism is used for driving the moving block and the magnet to move up and down together; the screen cover comprises a disc part and a second annular part which is arranged at a third opening of the disc part and outwards; the sieve cover is also used as a weighing container of the balance, namely the disc part is used for placing concrete to be weighed; the magnetic attraction piece is fixedly connected to the second annular part; the screen cover is used as a container for weighing concrete samples, and the combination and separation of the cylinder screen and the screen cover can be conveniently completed by matching the moving block, the magnet and the magnetic attraction piece; the method has the beneficial effects of being more convenient to operate and improving the accuracy of experimental results.

Description

Screen drum structure of concrete fineness negative pressure screen

Technical Field

The utility model relates to concrete testing, in particular to a screen cylinder structure of a concrete fineness negative pressure screen.

Background

In the using process of the concrete fineness negative pressure sieve, a concrete sample with a certain mass is generally weighed through a balance and a container; pouring the sample into a cylindrical screen, closing an opening of the cylindrical screen, which is not provided with a screen, through a screen cover, then placing the cylindrical screen and the screen cover together on a concrete fineness negative pressure screen, and performing an experiment, wherein the screen cover is lightly knocked in the experimental process; after the experiment is finished, pouring the residual concrete sample in the cylindrical screen back to the container, weighing by a balance, and calculating the fineness of the concrete sample according to the numerical value of the two times of weighing.

The existing measuring mode has the defects in the operation process, and the operation is relatively inconvenient; after the experiment is finished, when the residual concrete sample in the cylinder screen is poured back to the container, the concrete sample is easy to spill, and the experiment result is affected.

Disclosure of Invention

The application provides a screen drum structure of a concrete fineness negative pressure screen, which can solve the problem that the operation is inconvenient in the operation process of the existing measurement mode; after the experiment is finished, when the residual concrete sample in the cylinder screen is poured back to the container, the concrete sample is easy to spill, and the experimental result is affected.

In this application, provide a screen cylinder structure of concrete fineness negative pressure screen, include: the cylinder screen comprises a cylinder with two open ends, a screen arranged at a first opening of the cylinder, and a first annular part which is arranged at a second opening of the cylinder and outwards; the annular moving block is sleeved in the cylinder and can move up and down relative to the cylinder; the magnet is fixedly connected to the annular end face, close to the first annular part, of the moving block; the driving mechanism is used for driving the moving block and the magnet to move up and down together; a screen cover for covering the second opening of the cylinder, comprising a disc portion, a second annular portion disposed in the third opening of the disc portion and facing outwardly; the sieve cover is also used as a weighing container of a balance, namely the disc part is used for placing concrete to be weighed; the magnetic attraction piece is fixedly connected to the second annular portion and used for being attracted by the magnet.

Further, the driving mechanism is a thread, the section of the first annular part is L-shaped, the inner wall of the vertical part is provided with an internal thread, and the outer wall of the moving block is provided with a matched external thread.

Further, the driving mechanism includes: the connecting plate is sleeved into the cylinder, the connecting columns are fixedly connected between the connecting plate and the annular block, and the moving block is provided with a plurality of through holes for the connecting columns to pass through; the springs are sleeved on the connecting columns in sequence and are positioned between the connecting plate and the moving block.

Further, the first annular portion or the second annular portion is provided with a positioning ring.

Further, the positioning ring is disposed on the second annular portion.

Further, the magnetic attraction piece is fixedly adhered to the annular end face of the second annular portion, which is close to the third opening of the disc portion.

In summary, in the screen cylinder structure of the concrete fineness negative pressure screen, the screen cover is used as a container for weighing concrete samples, the first annular part and the second annular part are respectively arranged on the cylinder screen and the screen cover, and the combination and the separation of the cylinder screen and the screen cover can be conveniently completed by matching with the moving block, the magnet and the magnetic attraction piece; the method has the beneficial effects of being more convenient to operate and improving the accuracy of experimental results.

Drawings

In order to better and clearly describe the technical solutions in the embodiments or the background of the present application, the following description will describe the drawings used in the embodiments or the background of the present application.

FIG. 1 is a cross-sectional view of a cylindrical screen corresponding to a first drive mechanism;

FIG. 2 is a schematic view of a cylindrical screen corresponding to a second drive mechanism;

FIG. 3 is a schematic view of a screen cover;

FIG. 4 is a schematic view of a cylindrical screen in combination with a screen cover;

fig. 5 is a schematic view of the screen cover of fig. 4.

In the figure, 1, a cylinder screen; 1-1, a cylinder; 1-2, screen mesh; 1-3, a first annular portion; 1-31, internal threads; 2. a moving block; 3. a magnet; 4. a screen cover; 4-1, a disc portion; 4-2, a second annular portion; 4-21, annular groove; 4-22, positioning rings; 5. a magnetic attraction piece; 6. a connecting plate; 7. a connecting column; 8. and (3) a spring.

Detailed Description

Further description is provided below in connection with the accompanying drawings.

Referring to fig. 1 and 2, the application provides a screen drum structure of a concrete fineness negative pressure screen, which comprises a cylindrical screen 1, a moving block 2, a magnet 3, a driving mechanism, a screen cover 4 and a magnetic attraction sheet 5.

Referring to the cylinder screen 1 in the screen cylinder structure of the existing concrete fineness negative pressure screen, the same is: the cylinder screen 1 in the application also comprises a cylinder 1-1 with two openings at two ends and a first opening of the cylinder 1-1 of the screen 1-2; the differences are: the cylindrical screen 1 in the present application further comprises a first annular portion 1-3, the first annular portion 1-3 being integrally provided at the second opening of the cylinder 1-1 and outwardly.

The moving block 2 is annular, is sleeved into the cylinder 1-1 and can move up and down relative to the cylinder 1-1, namely the diameter of an inner hole of the moving block 2 is equal to the diameter of the outer wall of the cylinder 1-1.

The magnets 3 are adhered and fixed on the annular end surface of the moving block 2 close to the first annular part 1-3, and the annular magnets 3 can be directly adopted, or a plurality of magnets 3 can be adopted, and the magnets are adhered and fixed around the annular end surface in a circular array.

The driving mechanism is used for driving the moving block 2 and the magnet 3 to move up and down together in a manual matching mode. The following provides two drive mechanism arrangements:

referring to fig. 1, in one embodiment, the first driving mechanism is: the threads, namely the cross section of the first annular part 1-3 is L-shaped, the inner wall of the vertical part is provided with internal threads 1-31, and the outer wall of the moving block 2 is provided with matched external threads. By manually rotating the moving block 2 forward and backward, the moving block 2 and the magnet 3 can be driven to move up and down relative to the cylindrical screen 1. In order to facilitate the rotation of the moving block 2, a groove for placing and attaching fingers is provided on the annular end surface of the moving block 2 away from the first annular portion 1-3.

Referring to fig. 2, in another embodiment, the second driving mechanism includes: annular connecting plate 6, a plurality of spliced pole 7, a plurality of spring 8. The connecting plate 6 is sleeved into the cylinder 1-1, and a plurality of connecting posts 7 are fixedly connected between the connecting plate 6 and the first annular part 1-3, namely, the connecting plate 6 is relatively and fixedly connected to the cylinder screen 1. The moving block 2 is provided with a number of through holes through which the connecting posts 7 pass, and correspondingly, in this way, a plurality of magnets 3 are required, and the intervals between the magnets 3 are provided with through holes. The springs 8 are sequentially sleeved on the connecting posts 7 and are positioned between the connecting plate 6 and the moving block 2. Thus, under the action of the spring 8, the magnet 3 abuts against the first annular portion 1-3, manually moving the annular block and the magnet 3, and separating the magnet 3 from the first annular portion 1-3 against the spring 8.

Referring to fig. 3, the screen cover 4 is used to cover the second opening of the cylinder 1-1, and includes a disc portion 4-1, and a second annular portion 4-2 disposed at the third opening of the disc portion 4-1 and facing outward. The magnetic attraction piece 5 is annular and fixedly connected to the second annular part 4-2, so that the magnetic attraction piece 5 can be fixedly adhered to the annular end surface of the second annular part 4-2, which is far away from the third opening of the disc part 4-1; the annular groove 4-21 can be arranged on the annular end surface of the second annular part 4-2, which is close to the third opening of the disc part 4-1, and the magnetic sheet is adhered and fixed in the annular groove 4-21, and the annular groove 4-21 is arranged, so that the first annular part 1-3 and the second annular part 4-2 can keep fit, and the matching effect of the magnetic sheet 5 and the magnet 3 is improved. The magnet 3 is used for being absorbed by the magnet 3, namely, the combination between the screen cover 4 and the cylinder 1-1 can be completed through the cooperation of the magnet 3 and the magnet 5.

Combine concrete fineness negative pressure sieve, brief description the utility model discloses a use:

s1, separating a screen cover 4 from a cylindrical screen 1, placing the screen cover 4 on a balance as a container, and placing a concrete sample to be measured;

s2, adjusting the magnet 3 to enable the magnet 3 to prop against the first annular part 1-3, and then completing the combination between the screen cover 4 and the cylindrical screen 1 through the cooperation of the magnetic attraction piece 5 and the magnet 3, wherein the screen cover 4 is positioned below the cylindrical screen 1;

s3, inverting the screen cover 4 and the cylindrical screen 1 together, placing the screen cover 4 and the cylindrical screen 1 on a concrete fineness negative pressure screen, and allowing concrete samples in the screen cover 4 to fall into the cylindrical screen 1 to perform experiments, wherein in the experimental process, the screen cover 4 is lightly knocked; ( For the second driving mechanism, the connecting column 7 may be sleeve-shaped; the connecting plates 6 are provided with step through holes corresponding to each connecting column 7, bolts are penetrated in each step through hole, nuts of the bolts are placed through the step through holes, so that the connecting plates 6 keep a normal annular surface, and the concrete fineness negative pressure sieve is convenient to place subsequently; the first annular portions 1-3 are provided with threaded holes for each bolt )

S4, after the experiment is completed, taking out the screen cover 4 and the cylindrical screen 1, inverting again, and slightly shaking to enable the residual concrete sample in the cylindrical screen 1 to fall into the screen cover 4;

s5, adjusting the magnet 3 to enable the magnet 3 to be far away from the first annular part 1-3, separating the screen cover 4 and the cylindrical screen 1, and weighing the residual concrete sample in the screen cover 4 by using a balance.

Referring to fig. 4 and 5, in one embodiment, further, the first annular portion 1-3 or the second annular portion 4-2 is provided with a positioning ring 4-22. I.e. the outer wall of the positioning ring 4-22 is attached to the inner wall of the cylinder 1-1 or the disc portion 4-1, the coupling between the sieve cover 4 and the cylinder 1-1 can be more conveniently accomplished in the above-mentioned S2 process. In the above S3, S4, the concrete sample is transferred between the screen cover 4 and the cylindrical screen 1, and the amount of the concrete sample in S3 is much larger than S4. Therefore, preferably, the positioning ring 4-22 is disposed on the second annular portion 4-2, and after the positioning ring 4-22 is disposed on the second annular portion 4-2, the magnetic attraction sheet 5 can be directly adhered and fixed on the annular end surface of the second annular portion 4-2, which is close to the third opening of the disc portion 4-1, without disposing the annular groove 4-21.

Claims

1. A screen cylinder structure of a concrete fineness negative pressure screen, which is characterized by comprising:

a cylindrical screen (1), wherein the cylindrical screen (1) comprises a cylinder (1-1) with two open ends, a screen (1-2) arranged at a first opening of the cylinder (1-1), and a first annular part (1-3) arranged at a second opening of the cylinder (1-1) and outwards;

an annular moving block (2), wherein the moving block (2) is sleeved in the cylinder (1-1) and can move up and down relative to the cylinder (1-1); a magnet (3), wherein the magnet (3) is fixedly connected to the annular end surface of the moving block (2) close to the first annular part (1-3);

the driving mechanism is used for driving the moving block (2) and the magnet (3) to move up and down together;

a screen cover (4), wherein the screen cover (4) is used for covering the second opening of the cylinder (1-1) and comprises a disc part (4-1) and a second annular part (4-2) which is arranged at the third opening of the disc part (4-1) and outwards; the sieve cover (4) also serves as a weighing container of a balance, namely the disc part (4-1) is used for placing concrete to be weighed;

the magnetic attraction piece (5), the magnetic attraction piece (5) is fixedly connected to the second annular part (4-2) and is used for being attracted by the magnet (3).

2. The screen cylinder structure of the concrete fineness negative pressure screen according to claim 1, wherein the driving mechanism is a screw thread, the cross section of the first annular part (1-3) is L-shaped, the inner wall of the vertical part is provided with an inner screw thread (1-31), and the outer wall of the moving block (2) is provided with a matched outer screw thread.

3. The screen cylinder structure of the concrete fineness negative pressure screen according to claim 1, wherein the driving mechanism comprises:

the device comprises an annular connecting plate (6) and a plurality of connecting columns (7), wherein the connecting plate (6) is sleeved into the cylinder (1-1), the connecting columns (7) are fixedly connected between the connecting plate (6) and the first annular part (1-3), and the moving block (2) is provided with a plurality of through holes for the connecting columns (7) to pass through;

the springs (8) are sequentially sleeved on the connecting columns (7) and are positioned between the connecting plates (6) and the moving blocks (2).

4. Screen cylinder structure of a concrete fineness negative pressure screen according to claim 1, characterized in that the first annular part (1-3) or the second annular part (4-2) is provided with a positioning ring (4-22).

5. Screen cylinder structure of a concrete fineness negative pressure screen according to claim 4, characterized in that the positioning ring (4-22) is arranged at the second annular part (4-2).

6. The screen cylinder structure of the concrete fineness negative pressure screen according to claim 5, wherein the magnetic attraction sheet (5) is adhesively fixed on the annular end surface of the second annular portion (4-2) close to the third opening of the disc portion (4-1).