Static pressure molded water permeable brick and preparation method and equipment thereof

Abstract

The invention relates to the technical field of building materials, in particular to a static pressure molded water permeable brick and a preparation method and equipment thereof. The static pressure forming water permeable brick comprises a bottom material layer and a surface material layer, and the bottom material layer is prepared by mixing cement, aggregate and fine materials according to a certain ratio, adding a diluted bottom material additive and stirring. And the surface material layer is prepared by mixing cement and carborundum according to a proportion, adding a surface material additive and stirring. During preparation, firstly, the bottom material mixture is subjected to static pressure forming to form the bottom layer, and then the surface material layer mixture covers the bottom layer for secondary static pressure forming. The water permeable brick has both water permeability and strength, and has the advantages of high compressive strength and high water permeable rate, and the production process has the advantages of environmental protection, noise reduction and dust suppression.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and specifically to a permeable brick formed by static pressure, a preparation method thereof, and equipment. Background Art

[0002] With the acceleration of the urbanization process, permeable bricks, as a green and ecological building material, have been widely used in public spaces such as urban roads, squares, and parks. Due to their unique water permeability, permeable bricks help reduce urban runoff and optimize the urban water ecosystem. Currently, the production of permeable bricks in the market mainly uses vibration forming devices. During the forming process, the vibration forming device relies on the excitation force to make the raw materials closely arranged, thus generating relatively large noise. This noise not only affects the working environment at the production site but may also interfere with the lives of surrounding residents, which does not conform to the modern environmental protection concept. At the same time, the vibration forming device needs to consume a large amount of electric energy to maintain its vibration state, increasing the production cost. During the vibration forming process, the arrangement of raw materials is affected by various factors such as vibration frequency and amplitude, and changes in these factors may lead to large fluctuations in the forming quality of products. Therefore, it is of great practical significance to develop a permeable brick formed by static pressure with high compressive strength and high water permeability rate to replace the traditional vibration forming process. Summary of the Invention

[0003] Based on the problems existing in the above background art, a permeable brick formed by static pressure is proposed, which includes a bottom layer. A surface layer is statically formed on the upper end of the bottom layer. The bottom layer is composed of cement, aggregate, and fine material according to a certain weight ratio. The weight ratio of the components in the bottom layer is cement: aggregate: fine material = 100:300:150. The surface layer is composed of cement and carborundum according to a certain weight ratio. The weight ratio of the components in the surface layer is cement: quartz sand = 100:600.

[0004] Preferably, the aggregate in the bottom layer is small pieces of stone, and the fine material in the bottom layer is stone powder.

[0005] Preferably, a preparation method of a permeable brick formed by static pressure includes the following steps.

[0006] 1) Preparation of the bottom layer:

[0007] S1. Weighing raw materials: Weigh a certain weight of cement, aggregate, and fine material according to the ratio and perform forced stirring to make them evenly mixed.

[0008] S2. Dilute a certain weight of bottom layer additive with an appropriate amount of water and stir evenly. Add the evenly stirred additive to the bottom layer raw materials that have been evenly mixed in step S1, and stir evenly for 1 minute to obtain bottom layer mixture A.

[0009] S3. Transport the base material mixture A in step S2 to the mold base material box with permeable bricks through a conveyor belt, and obtain the base material layer of the permeable brick by static pressure forming;

[0010] 2) Preparation of the surface layer:

[0011] S1. Weigh a certain weight of emery, and moisten the emery with an appropriate amount of water;

[0012] S2. Add a certain weight of surface layer additive to an appropriate amount of water for dilution, and then put it into step S1 and stir evenly with the moistened emery;

[0013] S3. Weigh a certain weight of cement in proportion and add it to step S2 for forced stirring for three minutes to obtain the surface layer mixture B;

[0014] S4. Transport the surface layer mixture B to the mold with the base material layer of the permeable brick that has been static pressure formed through a conveyor belt, and obtain the permeable brick after static pressure forming again.

[0015] Preferably, in the preparation of the base material layer, the weight ratio of cement: aggregate: fine material: base material additive is 100: 300: 150: 1, and in the preparation of the surface layer, the weight ratio of cement: emery: surface layer additive is 100: 600: 1.

[0016] Preferably, the base material additive is in powder form, and all the raw materials in the weighing process are automatically weighed. The raw materials to be weighed for the base material layer and the surface layer are respectively loaded into the batching machine, and the batching machine automatically weighs according to the ratio through high-precision sensors.

[0017] Preferably, in step S3, the pressure of the static pressure forming is 210 - 250 MPa, and in step S4, the pressure of the static pressure forming is 210 - 250 MPa.

[0018] Preferably, a device for preparing permeable bricks uses a static pressure forming machine.

[0019] Preferably, the static pressure forming machine includes a vibration damping device. The vibration damping device is installed between the mold frame of the static pressure forming machine and the press platform. The vibration damping device includes a vibration table. A vibration damping member is connected below the vibration table. Two groups of eccentric shafts are longitudinally and symmetrically installed in the vibration damping member to cancel the vibration in the horizontal direction. The output end of the eccentric shaft extends out of the vibration damping member. The output end of the eccentric shaft is connected to an external drive motor through a coupling. The eccentric shaft converts the rotational motion of the drive motor into the linear motion of the vibration table.

[0020] Preferably, a chute is opened at the middle position between the two groups of eccentric shafts on the end face of the vibration damping member, and a number of flanges are symmetrically formed on the left and right end faces of the vibration damping member.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: 1) Through the hierarchical functional design, the water permeability, wear resistance and overall structural strength of the brick body are improved. The hierarchical formulation design, combined with high-pressure static pressing molding, ensures high density, stable water permeability rate and improved compressive strength of the brick body, effectively avoiding the problem of uneven quality caused by parameter fluctuations in the traditional vibration process, and avoiding the high-intensity noise pollution generated by the vibration molding device.

[0022] 2) An automatic weighing and batching system (controlled by high-precision sensors for ratio) is adopted, combined with belt feeding and hierarchical static pressing technology, to achieve precise raw material ratio and standardized production process, significantly improving product consistency and production efficiency. The static pressing molding machine is equipped with a vibration damping device, which actively cancels vibration transmission to reduce the residual vibration during equipment operation, extend the equipment life and ensure the molding accuracy.

[0023] 3) The permeable brick depends on the formation of internal connected pores to achieve the functions of water permeability and air permeability. During the static pressing molding process, excessive vibration or impact may cause the aggregate to be overly compacted, the pore structure to be damaged, and the water permeability performance to be reduced. The vibration damping device of the present invention can buffer the dynamic impact force during high-pressure pressing, ensure uniform pressure transmission, and can not only compact the material to meet the strength requirements, but also retain the necessary porosity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of a static pressing molded permeable brick.

[0025] Figure 2 It is a schematic structural diagram of the vibration damping device.

[0026] In the drawings, the component names represented by each reference numeral are as follows: 1, bottom layer; 2, surface layer; 3, vibrating table; 4, vibration damping member; 5, eccentric shaft; 6, chute; 7, flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] A static pressing molded permeable brick includes a bottom layer 1, and a surface layer 2 is statically pressed on the upper end of the bottom layer 1. The bottom layer 1 is composed of cement, aggregate and fine material according to a certain weight ratio. The weight ratio of the components in the bottom layer 1 is cement: aggregate: fine material = 100: 300: 150. The surface layer 2 is composed of cement and emery according to a certain weight ratio. The weight ratio of the components in the surface layer 2 is cement: quartz sand = 100: 600.

[0029] Further, the aggregate in the base layer 1 is melon seed chips, and the fine material in the base layer 1 is stone powder.

[0030] Further, a preparation method of a static-pressure formed permeable brick includes the following steps.

[0031] 1) Preparation of the base layer 1:

[0032] S1. Raw material weighing: Weigh a certain weight of cement, aggregate, and fine material according to the ratio and conduct forced stirring to be uniform.

[0033] S2. Add a certain weight of base layer additive to an appropriate amount of water for dilution and stir evenly. Then add the evenly stirred additive to the base layer raw materials that have been evenly mixed in step S1, and stir evenly for 1 minute to obtain the base layer mixture A.

[0034] S3. Transport the base layer mixture A in step S2 to the base material box of the mold with the permeable brick through a conveyor belt, and perform static-pressure forming to obtain the base layer 1 of the permeable brick.

[0035] 2) Preparation of the surface layer 2:

[0036] s1. Weigh a certain weight of emery and moisten the emery with an appropriate amount of water.

[0037] s2. Add a certain weight of surface layer additive to an appropriate amount of water for dilution, and then put it into step s1 and stir evenly with the moistened emery.

[0038] s3. Weigh a certain weight of cement according to the ratio and add it to step s2 for forced stirring for three minutes to obtain the surface layer mixture B.

[0039] s4. Transport the surface layer mixture B to the mold with the static-pressure formed base layer 1 of the permeable brick through a conveyor belt, and perform static-pressure forming again to obtain the permeable brick.

[0040] Further, in the preparation of the base layer 1, the weight ratio of cement: aggregate: fine material: base layer additive is 100:300:150:1, and in the preparation of the surface layer 2, the weight ratio of cement: emery: surface layer additive is 100:600:1.

[0041] Further, the base layer additive is in powder form, and the raw materials in the weighing process are all automatically weighed. The raw materials required for the base layer 1 and the surface layer 2 are respectively loaded into the batching machine, and the batching machine automatically weighs according to the ratio through a high-precision sensor.

[0042] Further, in step S3, the pressure of static-pressure forming is 210 - 250 MPa, and in step s4, the pressure of static-pressure forming is 210 - 250 MPa.

[0043] Further, a device for preparing permeable bricks uses a static pressure molding machine.

[0044] Further, the static pressure molding machine includes a vibration damping device, which is installed between the mold frame of the static pressure molding machine and the press platform. The vibration damping device includes a vibrating table 3, a vibration damping member 4 is connected below the vibrating table 3, and 2 groups of eccentric shafts 5 are longitudinally and symmetrically installed in the vibration damping member 4. The output end of the eccentric shaft 5 extends out of the vibration damping member 4. The output end of the eccentric shaft 5 is connected to an external drive motor through a coupling. The eccentric shaft 5 converts the rotational motion of the drive motor into the linear motion of the vibrating table 3.

[0045] Further, a chute 6 is opened at the middle position between the two groups of eccentric shafts 5 on the end face of the vibration damping member 4, and a plurality of flanges are symmetrically formed on the left and right side end faces of the vibration damping member 4.

[0046] Example 1

[0047] 1) Preparation of the bottom material layer:

[0048] S1. Raw material weighing: Weigh three raw materials according to the weight ratio of cement: crushed stone: stone powder = 100:300:150 and perform forced stirring evenly;

[0049] S2. Weigh the bottom material additive according to the ratio of cement: bottom material additive = 100:1, add appropriate amount of water to the bottom material additive for dilution and stir evenly, and add the evenly stirred additive to the bottom material raw materials that have been mixed evenly in step S1, and stir evenly for 1 minute to obtain the bottom material mixture A;

[0050] S3. Transport the bottom material mixture A in step S2 to the mold bottom material box with permeable bricks through a conveyor belt, and perform static pressure molding at a pressure of 210 MPa to obtain the bottom material layer of the permeable brick;

[0051] 2) Preparation of the surface material layer:

[0052] s1. Weigh a certain weight of emery according to the weight ratio of cement: emery: surface material additive = 100:600:1, and moisten the emery with appropriate amount of water;

[0053] s2. Add an appropriate amount of water to dilute a certain weight of the surface material additive, and then put it into step s1 and stir evenly with the moistened emery;

[0054] s3. Weigh a certain weight of cement according to the ratio and add it to step s2 for forced stirring for three minutes to obtain the surface material mixture B;

[0055] s4. Transport the surface material mixture B to the mold with the static pressure molded bottom material layer of the permeable brick through a conveyor belt, and perform static pressure molding again at a pressure of 210 MPa to obtain the permeable brick.

[0056] Example 2

[0057] 1) Preparation of the base layer:

[0058] S1. Weighing of raw materials: Weigh three raw materials according to the weight ratio of cement: crushed stone: stone powder = 100:300:150 and perform forced stirring to make them evenly mixed;

[0059] S2. Weigh the base layer additive according to the ratio of cement: base layer additive = 100:1, add appropriate amount of water to the base layer additive for dilution and stir evenly, then add the evenly stirred additive to the base layer raw materials that have been evenly mixed in step S1, and stir evenly for 1 minute to obtain the base layer mixture A;

[0060] S3. Transport the base layer mixture A in step S2 to the mold base layer box with permeable bricks through a conveyor belt, and perform static pressure molding at a pressure of 250 MPa to obtain the base layer of the permeable brick;

[0061] 2) Preparation of the surface layer:

[0062] s1. Weigh a certain weight of emery according to the weight ratio of cement: emery: surface layer additive = 100:600:1, and moisten the emery with appropriate amount of water;

[0063] s2. Add appropriate amount of water to dilute a certain weight of the surface layer additive, and then put it into step s1 to stir evenly with the moistened emery;

[0064] s3. Weigh a certain weight of cement according to the ratio and add it to step s2 for forced stirring for three minutes to obtain the surface layer mixture B;

[0065] s4. Transport the surface layer mixture B to the mold with the base layer of the permeable brick that has been static pressure molded through a conveyor belt, and perform static pressure molding again at a pressure of 250 MPa to obtain the permeable brick.

[0066] The permeable bricks prepared in Example 1 and Example 2 were tested, and the data are shown in the following table.

[0067] Table 1 Test data table of permeable bricks

[0068]

[0069] Example 3

[0070] 1) Preparation of the base layer:

[0071] S1. Weighing of raw materials: Weigh three raw materials according to the weight ratio of cement: crushed stone: stone powder = 100:300:150 and perform forced stirring to make them evenly mixed;

[0072] S2. Weigh the base material additive according to the ratio of cement: base material additive = 100:1, add appropriate amount of water to the base material additive for dilution and stir evenly, then add the evenly stirred additive to the base material raw materials that have been evenly mixed in step S1, and stir evenly for 1 minute to obtain the base material mixture A;

[0073] S3. Transport the base material mixture A in step S2 to the mold base material box with permeable bricks through a conveyor belt, and statically press it into the base material layer of the permeable brick under a pressure of 230 MPa;

[0074] 2) Preparation of the surface layer:

[0075] s1. First, weigh a certain weight of emery according to the weight ratio of cement: emery: surface layer additive = 100:600:1, and moisten the emery with appropriate amount of water;

[0076] s2. Add appropriate amount of water to dilute a certain weight of the surface layer additive, and then put it into step s1 to stir evenly with the moistened emery;

[0077] s3. Weigh a certain weight of cement according to the ratio and add it to step s2 for forced stirring for three minutes to obtain the surface layer mixture B;

[0078] s4. Transport the surface layer mixture B to the mold with the base material layer of the permeable brick that has been statically pressed through a conveyor belt, and statically press it again under a pressure of 230 MPa to obtain the permeable brick.

[0079] The above is only the preferred embodiment of the present invention. It should be noted that the above preferred embodiment should not be regarded as a limitation of the present invention. The protection scope of the present invention should be subject to the scope defined by the claims. For those of ordinary skill in the art in this technical field, without departing from the spirit and scope of the present invention, several improvements and refinements can also be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A permeable brick formed by static pressure molding, characterized in that: It includes a bottom layer. A fabric layer is statically pressed and formed on the upper end of the bottom layer. The bottom layer is composed of cement, aggregate, and fine material according to a certain weight ratio. The weight ratio of the components in the bottom layer is cement: aggregate: fine material = 100:300:

150. The fabric layer is composed of cement and emery according to a certain weight ratio. The weight ratio of the components in the fabric layer is cement: quartz sand = 100:

600.

2. The permeable brick formed by static pressure according to claim 1, wherein: The aggregate in the bottom layer is flake stone, and the fine material in the bottom layer is stone powder.

3. The preparation method of a static pressure formed permeable brick according to claim 1, characterized in that: It includes the following steps 1) Preparation of the bottom layer: S1. Raw material weighing: Weigh a certain weight of cement, aggregate, and fine material according to the ratio and conduct forced stirring to be evenly mixed; S2. Dilute a certain weight of bottom layer additive with appropriate water and stir evenly. Add the evenly stirred bottom layer additive to the bottom layer raw materials that have been evenly mixed in step S1, and stir evenly for 1 minute to obtain bottom layer mixture A; S3. Transport the bottom layer mixture A in step S2 to the bottom layer box of the mold with permeable bricks through a conveyor belt, and statically press and form to obtain the bottom layer of the permeable brick; 2) Preparation of the fabric layer: s1. Weigh a certain weight of emery and moisten the emery with appropriate water; s2. Dilute a certain weight of fabric additive with appropriate water, and then put it into step s1 and stir evenly with the moistened emery; s3. Weigh a certain weight of cement according to the ratio and add it to step s2 for forced stirring for three minutes to obtain fabric mixture B; s4. Transport the fabric mixture B to the mold with the bottom layer of the permeable brick that has been statically pressed and formed through a conveyor belt, and statically press and form again to obtain the permeable brick.

4. The preparation method of a static pressure formed permeable brick according to claim 3, characterized in that: In the preparation of the bottom layer, the weight ratio of cement: aggregate: fine material: bottom layer additive is 100:300:150:

1. In the preparation of the fabric layer, the weight ratio of cement: emery: fabric additive is 100:600:

1.

5. The preparation method of a static pressure forming permeable brick according to claim 3, characterized in that: The bottom layer additive is in powder form. All the raw materials in the weighing process are automatically weighed. The raw materials that need to be weighed for the bottom layer and the fabric layer are respectively loaded into the batching machine, and the batching machine automatically weighs according to the ratio through high-precision sensors.

6. The preparation method of a static pressure forming permeable brick according to claim 3, characterized in that: In step S3, the pressure of the static pressing and forming is 210 - 250 MPa. In step s4, the pressure of the static pressing and forming is 210 - 250 MPa.

7. An apparatus for preparing the permeable brick according to any one of claims 1-6, characterized in that: The equipment used is a static pressing and forming machine.

8. An apparatus according to claim 7, characterized in that: The static pressing and forming machine includes a vibration damping device. The vibration damping device is installed between the mold frame of the static pressing and forming machine and the press platform. The vibration damping device includes a vibration table. A vibration damping member is connected below the vibration table. 2 groups of eccentric shafts are longitudinally symmetrically installed in the vibration damping member. The output end of the eccentric shaft extends out of the vibration damping member. The output end of the eccentric shaft is connected to an external driving motor through a coupling. The eccentric shaft converts the rotational motion of the driving motor into the linear motion of the vibration table.

9. An apparatus according to claim 8, wherein: A chute is opened at the middle position between the 2 groups of eccentric shafts on the end face of the vibration damping member. A number of flanges are symmetrically formed on the left and right end faces of the vibration damping member.

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