Square hole gravel screen for concrete preparation
By setting recessed holes on the inner wall of the sieve box that are flush with the sieve mesh and using carbon fiber sieve mesh, the problems of sieve clogging and corrosion are solved, achieving efficient screening and extending service life.
Patent Information
- Application Number
- CN202520248185.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-02-17
AI Technical Summary
Existing square-hole sand and gravel screens are prone to clogging at the edges during fine aggregate screening, leading to increased screening losses and data distortion. Furthermore, traditional screens are susceptible to corrosion and have a short service life.
The main body of the screen is made of carbon fiber mesh, and the inner wall of the screen box is provided with concave holes that are the same plane as the screen mesh. Combined with the cover plate and reinforcing rib design, it reduces the accumulation and spillage of fine aggregates and improves the structural strength.
It reduces screening errors, extends the service life of the screen, reduces the loss of fine aggregates, and enhances the durability and stability of the screen.
Smart Images
Figure CN223669616U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of concrete preparation, in particular to a square-hole sand and stone screen for concrete preparation. BACKGROUND
[0002] With the vigorous development of the building industry in China, concrete is widely used in various buildings, and concrete is a kind of artificial stone material which is made of cement as the main cementitious material, water, sand and gravel, and necessary chemical admixtures and mineral admixtures, and is prepared by mixing, compacting and curing hardening according to appropriate proportions. At present, in the industrialized production of concrete, the selection of sand is mainly screening, so as to accurately obtain the grading of aggregate, then the sand is weighed and proportioned, and finally transported to the mixing structure to be mixed with other admixtures to form concrete. The square-hole sand and stone screen is mainly used for accurate screening of the solid content of granular and powdery materials in the concrete preparation process, so as to ensure the quality of concrete preparation.
[0003] At present, in the screening process of fine aggregate, the gap at the edge of the standard square-hole sand and stone screen is small, and a small amount of fine aggregate is easily left at the edge of the screen, so that the fine aggregate left in the gap at the edge of the screen increases the screening loss and causes the screening data to be distorted to a certain extent. When the edge of the screen is blocked by particles, personnel need to use a wire to poke the holes one by one to push out the materials, so it needs to be improved. CONTENT OF THE INVENTION
[0004] In order to reduce the situation that the fine aggregate blocks the edge of the screen, the application provides a square-hole sand and stone screen for concrete preparation.
[0005] The application provides a square-hole sand and stone screen for concrete preparation, which adopts the following technical scheme:
[0006] The square-hole sand and stone screen for concrete preparation comprises a screen box and a screen body, the screen box is hollow and forms an accommodating cavity, the screen body is horizontally arranged in the accommodating cavity and connected with the screen box, the screen body is provided with screen holes which are distributed at intervals and used for screening fine aggregate, and the inner wall of the screen box is embedded with a plurality of recessed holes which are distributed along the circumference of the screen box and in the same plane as the screen body, and the recessed holes are communicated with the screen holes at the outer edge of the screen body.
[0007] By adopting the above technical scheme, the recessed holes are arranged at intervals on the inner wall of the screen box, the recessed holes are coplanar with the center of the plane where the screen body is located, so that the fine aggregate is not easily accumulated in the gap at the outer edge of the screen body during the screening process, thereby reducing the error. Meanwhile, the recessed holes are embedded, and only the thickness of the screen box is occupied, so the size of the screen area required by the specification is not affected.
[0008] Preferably, the screen body is a carbon fiber screen.
[0009] By adopting the above technical scheme, the screen body made of carbon fiber material has two advantages: first, the strength far exceeds the bearing capacity required for screening fine aggregate, and damage is less likely to occur; second, from the perspective of instrument maintenance, carbon fiber does not have the problem of rust, and traditional screen wires often rust due to insufficient dryness of the environment, which also leads to deformation of the screen. The storage environment requirement of carbon fiber wire for the instrument is reduced, greatly prolonging the service life of the instrument.
[0010] Preferably, the screen body divides the containing cavity into a first cavity and a second cavity, the first cavity is located above the second cavity, and the cross-sectional area of the second cavity gradually decreases in a direction away from the screen body.
[0011] By adopting the above technical scheme, the fine aggregate is placed in the first cavity and falls into the second cavity after being screened by the screen body. Since the cross-sectional area of the second cavity gradually decreases in a direction away from the screen body, the screened material can be concentrated and dropped.
[0012] Preferably, it further includes a cover plate, the cover plate is connected with the screen box, and is used for shielding the opening of the first cavity.
[0013] By adopting the above technical scheme, before screening, the cover plate can be covered on the first cavity to shield the fine aggregate and reduce the possibility of the fine aggregate being scattered due to horizontal swinging of the screen box during screening.
[0014] Preferably, a convex ring is arranged on the outer side wall of the screen box, a groove is arranged on the inner wall of the cover plate, and the convex ring is connected with the groove.
[0015] By adopting the above technical scheme, the cover plate and the screen box are connected through the cooperation of the convex ring and the groove.
[0016] Preferably, a handle is connected to the outer side wall of the screen box, and the handle is used for holding by a person.
[0017] By adopting the above technical scheme, the worker can hold both hands on the handle and then move or shake the screen box.
[0018] Preferably, it further includes a reset spring and a T-shaped column, the reset spring is arranged on the handle and connected with the T-shaped column, and the T-shaped column is slidably connected with the handle and used for being inserted into the cover plate.
[0019] By adopting the technical scheme, when the cover plate needs to be clamped on the sieve box, an external force is first applied to the T-shaped column so that the T-shaped column moves away from the sieve box, at this time the reset spring is stretched to generate elastic potential energy. After the cover plate is clamped on the sieve box, the external force applied to the T-shaped column is removed, so that one end of the T-shaped column can be inserted into the reserved hole in the cover plate, thereby further improving the stability of the connection between the cover plate and the sieve box.
[0020] Preferably, a reinforcing rib is further connected to the outer side wall of the sieve box, and the reinforcing rib is arranged along the circumference of the sieve box.
[0021] By adopting the technical scheme, the reinforcing rib can improve the overall structural strength of the sieve box.
[0022] In summary, the present application has at least one of the following beneficial technical effects:
[0023] (1) By arranging the recessed holes on the inner wall of the sieve box according to a specific specification and at intervals, the recessed holes are in the same plane as the center of the plane where the sieve mesh body is located, so that fine aggregate is not easy to accumulate in the gap of the outer edge of the sieve mesh body during the screening process, thereby reducing errors.
[0024] (2) By using carbon fiber to make the sieve mesh body, the strength of the carbon fiber sieve mesh far exceeds the required bearing capacity for screening fine aggregate, and it is not easy to be damaged, which can prolong the service life.
[0025] (3) By arranging the cover plate, the cover plate can be covered on the first cavity before screening to block the fine aggregate and reduce the possibility of fine aggregate spilling out during the screening process. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 is a structure schematic view of a sieve mesh in an embodiment of the present application;
[0027] Figure 2 is a cross-sectional schematic view of the sieve mesh A-A in an embodiment of the present application;
[0028] Figure 3 is a structure schematic view of a sieve mesh in another embodiment of the present application.
[0029] Reference signs: 1, sieve box; 2, sieve mesh body; 3, containing cavity; 31, first cavity; 32, second cavity; 4, cover plate; 5, protruding ring; 6, reinforcing rib; 7, handle; 8, reset spring; 9, T-shaped column. DETAILED DESCRIPTION
[0030] The technical solutions of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. The present application can be embodied in various forms, and is not limited to the embodiments described here.
[0031] In the description of the present application, the expressions of "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics of the expressions can be combined in any one or more embodiments or examples in a suitable manner.
[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "including", "comprising" and "having" and any variations thereof in the specification and claims herein is intended to cover both the inclusive and exclusive cases.
[0033] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected; it can also be detachably connected; or it can be integrated; or it can be mechanically connected. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0034] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. Those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples represented in the present application without conflict.
[0035] The embodiments of the present application disclose a square hole sand screen for concrete preparation. Referring to Figure 1 and Figure 2 , the screen includes a screen box 1 and a screen body 2. The screen box 1 is hollow and has a receiving cavity 3, and the screen body 2 is fixedly connected to the screen box 1 and horizontally arranged in the receiving cavity 3. In the present embodiment, the screen body 2 divides the receiving cavity 3 into a first cavity 31 and a second cavity 32, the first cavity 31 is located above the second cavity 32, and the cross-sectional area of the second cavity 32 gradually decreases in the direction away from the screen body 2. The screen body 2 is spaced apart and has screen holes, and the screen body 2 is used for screening fine aggregate. A plurality of recessed holes are embedded on the inner wall of the screen box 1, each recessed hole is distributed along the circumference of the screen box 1 and is in the same plane as the screen body 2, and the recessed hole and the screen hole at the outer edge of the screen body 2 are communicated.
[0036] By opening recessed holes on the inner wall of the sieve box 1 at certain intervals, the recessed holes are coplanar with the center of the sieve mesh body 2, so that fine aggregate is not easy to accumulate at the gap of the outer edge of the sieve mesh body 2 during the screening process, thereby reducing errors. At the same time, the recessed holes are inlaid and only occupy the wall thickness of the sieve box 1, so the size of the sieve mesh area required by the specification will not be affected.
[0037] In this embodiment, the sieve mesh body 2 is a carbon fiber sieve mesh. The sieve mesh body 2 made of carbon fiber material has two advantages: first, the strength far exceeds the required bearing capacity for screening fine aggregate, and is not easy to be damaged; second, from the perspective of instrument maintenance, carbon fiber does not have the problem of rust, and traditional iron wire often rusts due to insufficient dryness of the environment, which also leads to deformation of the sieve mesh. The storage environment requirement of carbon fiber wire for the instrument is reduced, which greatly prolongs the service life of the instrument.
[0038] In combination Figure 3 In some embodiments, the sieve box 1 is hingedly connected with a cover plate 4, and the cover plate 4 is used to cover the opening of the first cavity 31. Specifically, a convex ring 5 is arranged on the outer side wall of the sieve box 1, and a recess is arranged on the inner wall of the cover plate 4, and the convex ring 5 is clamped in the recess. Before screening, the cover plate 4 can be covered on the first cavity 31 to block the fine aggregate, reducing the possibility of fine aggregate spilling out due to horizontal swinging of the sieve box 1 during screening. The outer side wall of the sieve box 1 is further fixedly connected with a reinforcing rib 6, the reinforcing rib 6 is located below the convex ring 5 and is arranged along the circumference of the sieve box 1. The reinforcing rib 6 can improve the structural strength of the sieve box 1 as a whole, further prolonging the service life.
[0039] In addition, the outer side wall of the sieve box 1 is fixedly connected with a handle 7, and the handle 7 is used for personnel to hold. The worker can hold both hands on the handle 7, and then move or horizontally shake the sieve box 1 and other operations. In some embodiments, the handle 7 is further provided with a reset spring 8 and a T-shaped column 9, the T-shaped column 9 is slidably connected to the handle 7 and is used for being inserted into the cover plate 4, and the T-shaped column 9 moves in the horizontal direction. One end of the reset spring 8 is connected to the handle 7, and the other end is connected to the T-shaped column 9. The elastic force direction of the reset spring 8 and the moving direction of the T-shaped column 9 are in the same straight line. When it is needed to clamp the cover plate 4 on the sieve box 1, an external force is first applied to the T-shaped column 9, so that the T-shaped column 9 moves away from the sieve box 1. At this time, the reset spring 8 is stretched to generate elastic potential energy. After the cover plate 4 is clamped on the sieve box 1, the external force applied to the T-shaped column 9 is removed, so that one end of the T-shaped column 9 can be inserted into the reserved hole of the cover plate 4, so as to improve the stability of the connection between the cover plate 4 and the sieve box 1.
[0040] The implementation principle of the concrete preparation square-hole sandstone screen of the embodiment of the application is that: recessed holes are arranged on the inner wall of the screen box 1 according to specific specifications, the recessed holes are in the same plane as the center of the plane where the screen body 2 is located, so that the gap at the outer edge of the screen body 2 is increased to a certain extent, so that fine aggregate is not easy to accumulate in the gap at the outer edge of the screen body 2 in the screening process, thereby reducing the error.
[0041] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: all equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.
Claims
1. A square-hole aggregate screen for concrete production, characterized by, The utility model provides a screening box and a screen body, the screening box is hollow and has a containing cavity, the screen body is horizontally arranged in the containing cavity and connected with the screening box, the screen body is provided with screen holes at intervals, and the screen body is used for screening fine aggregate; a plurality of recessed holes are embedded in the inner wall of the screening box, the recessed holes are distributed along the circumference of the screening box and in the same plane with the screen body, and the recessed holes are communicated with the screen holes on the outer edge of the screen body.
2. The square hole sand screen for concrete production according to claim 1, wherein, The screen body is a carbon fiber screen.
3. The square hole sand screen for concrete production according to claim 1, wherein, The screen body divides the containing cavity into a first cavity and a second cavity, the first cavity is above the second cavity, and the cross-sectional area of the second cavity gradually decreases away from the screen body.
4. The square hole sand screen for concrete production according to claim 3, wherein, The utility model also provides a cover plate connected with the screening box and used for covering the opening of the first cavity.
5. The square hole sand screen for concrete production according to claim 4, wherein, The outer side wall of the screening box is provided with a convex ring, the inner wall of the cover plate is provided with a groove, and the convex ring is clamped in the groove.
6. The square hole sand screen for concrete production according to claim 4, wherein, The outer side wall of the screening box is connected with a handle used for holding by a person.
7. The square hole sand screen for concrete production according to claim 6, wherein, The utility model also provides a reset spring and a T-shaped column, the reset spring is arranged on the handle and connected with the T-shaped column, the T-shaped column is slidingly connected with the handle and used for being inserted into the cover plate.
8. The square hole sand screen for concrete production according to claim 1, wherein, The outer side wall of the screening box is also connected with a reinforcing rib arranged along the circumference of the screening box.