Coal gangue hollow brick compression molding device

Abstract

The utility model relates to the field of coal gangue pressing, in particular to a coal gangue hollow brick pressing and forming device, and aims to solve the technical problem that bubbles in pressed and formed mud strips are difficult to discharge during vacuum treatment of the conventional coal gangue hollow brick pressing device. The conveying shaft is concentrically arranged with the primary extrusion cylinder, the inner bottom surface of the vacuum chamber and the secondary extrusion cylinder, the conveying shaft in the primary extrusion cylinder is connected with a spiral blade I, the conveying shaft in the vacuum chamber is connected with a cutter, the conveying shaft in the secondary extrusion cylinder is connected with a spiral blade II, and the inner diameter of the outlet end of the sealing cylinder is equal to the diameter of the inner bottom surface of the vacuum chamber and the inner diameter of the secondary extrusion cylinder. The mud strip in the vacuum chamber is split by the thin cutter to form small gaps, bubbles in the mud strip are discharged along the gaps of the mud strip, holes in the mud strip are eliminated, extruded green bricks are finer, connection is completed through the threaded ring and the threaded ring groove, silt cannot enter threads, and the mold is convenient to replace and disassemble.

Description

Technical Field

[0001] The utility model relates to the field of coal gangue pressing, in particular to a coal gangue hollow brick pressing and forming device. Background Art

[0002] Gangue is a rock mixed with organic and inorganic compounds deposited together with coal during the coal-forming process. It is usually in thin layers and in coal seams or on the top and bottom of coal seams. It is a large amount of solid mine waste generated during coal mine construction and coal mining, washing and processing. If the gangue is abandoned, it will occupy a large area of ​​land, resulting in a waste of land resources. In addition, the escape or leaching of sulfides in the gangue will pollute the atmosphere, farmland and water bodies. Gangue mountains can also spontaneously combust and cause fires, or collapse in the rainy season, silting up rivers and causing disasters. In order to eliminate pollution and effectively utilize gangue, many countries have begun to pay attention to the treatment and utilization of gangue since the 1960s. Using gangue to make bricks not only saves land, but also consumes mine waste. It is an environmentally friendly low-carbon building material;

[0003] In the prior art, it is difficult to discharge the bubbles inside the pressed mud strips during vacuum treatment in the coal gangue hollow brick pressing device. The utility model solves the above problem. Utility Model Content

[0004] The utility model provides a gangue hollow brick pressing device to solve the technical problem that it is difficult to discharge bubbles inside the pressed mud strips during vacuum treatment in the prior art.

[0005] A coal gangue hollow brick pressing and forming device comprises: a primary extrusion cylinder, one end of the primary extrusion cylinder is connected with a sealing cylinder, the sealing cylinder is connected with a vacuum chamber, the vacuum chamber is connected with a secondary extrusion cylinder, the end of the secondary extrusion cylinder is connected with a mold, the vacuum chamber is connected with a pump air pump, the primary extrusion cylinder, the vacuum chamber, and the secondary extrusion cylinder are provided with a conveying shaft, the conveying shaft is concentrically arranged with the primary extrusion cylinder, the inner bottom surface of the vacuum chamber, and the secondary extrusion cylinder, the conveying shaft in the primary extrusion cylinder is connected with a spiral blade 1, the conveying shaft in the vacuum chamber is connected with a cutter, the conveying shaft of the secondary extrusion cylinder is connected with a spiral blade 2, and the inner diameter of the outlet end of the sealing cylinder is equal to the diameter of the bottom surface in the vacuum chamber and the inner diameter of the secondary extrusion cylinder.

[0006] Furthermore, there are multiple cutters, and the projections of any two cutters along the axial direction of the conveying shaft will not overlap, and the thickness of the cutter is not greater than 3 mm.

[0007] Furthermore, the second spiral blade extends into the vacuum chamber.

[0008] Furthermore, the mold includes a mold shell, a threaded ring is connected to the feed end of the mold shell, a threaded ring groove is provided at the end of the secondary extrusion cylinder, the threaded ring is threadedly connected to the threaded ring groove, and a hollow mold is connected inside the mold shell.

[0009] Furthermore, the hollow mold is composed of a plurality of L-shaped modules evenly distributed around the circumference, and the L-shaped module at the feed end of the mold shell is provided with a taper angle.

[0010] Beneficial effects of the utility model:

[0011] 1. The mud strips in the vacuum chamber are cut into relatively small gaps by a thin cutter, and the bubbles inside the mud strips are discharged along the gaps, eliminating the holes in the mud strips, and the extruded bricks are more delicate;

[0012] 2. The connection is completed through the thread ring and the thread ring groove, so that mud and sand will not enter the thread, making it easy to replace and disassemble the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0014] Figure 2 It is a schematic diagram of the structural section of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0016] Figure 4 This is a schematic diagram of the structure of the utility model Figure 3 ;

[0017] Figure 5 It is an enlarged schematic diagram of structure A of the utility model;

[0018] In the figure: primary extrusion cylinder 1; sealing cylinder 2; vacuum chamber 3; secondary extrusion cylinder 4; mold 5; conveying shaft 6; spiral blade 1 7; cutter 8; spiral blade 2 9; mold shell 51; threaded ring 52; hollow mold 53; cone angle 54. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The rotational connection described in this device refers to the process of baking the bearing on the shaft, providing a spring retaining ring groove on the shaft or the shaft hole, and clamping the elastic retaining ring in the retaining ring groove to achieve axial fixation of the bearing and realize rotation; the articulation refers to a connection method that is active on connecting parts such as hinges, pins and short shafts.

[0021] The present invention will be described in detail below with reference to the accompanying drawings.

[0022] Embodiment 1:

[0023] The following is combined with Figure 1-5 The present embodiment describes a hollow gangue brick pressing and forming device, comprising: a primary extrusion cylinder 1, one end of the primary extrusion cylinder 1 is connected with a sealing cylinder 2, the sealing cylinder 2 is connected with a vacuum chamber 3, the vacuum chamber 3 is connected with a secondary extrusion cylinder 4, the end of the secondary extrusion cylinder 4 is connected with a mold 5, the vacuum chamber 3 is connected with a pump, the primary extrusion cylinder 1, the vacuum chamber 3, and the secondary extrusion cylinder 4 are provided with a conveying shaft 6, the conveying shaft 6 is concentrically arranged with the primary extrusion cylinder 1, the inner bottom surface of the vacuum chamber 3, and the secondary extrusion cylinder 4, the conveying shaft 6 in the primary extrusion cylinder 1 is connected with a spiral blade 7, the conveying shaft 6 in the vacuum chamber 3 is connected with a cutter 8, the conveying shaft 6 in the secondary extrusion cylinder 4 is connected with a spiral blade 2 9, and the inner diameter of the outlet end of the sealing cylinder 2 is equal to the inner bottom diameter of the vacuum chamber 3 and the inner diameter of the secondary extrusion cylinder 4;

[0024] The feeding mechanism injects the raw materials into the primary extrusion cylinder 1, and turns on the power of the conveying shaft 6. The conveying shaft 6 drives the spiral blade 1 7, the cutter 8, and the spiral blade 2 9 to rotate. The spiral blade 1 7 conveys the raw materials to the sealing cylinder 2 and extrude them. The extruded mud strips enter the vacuum chamber 3, and then enter the secondary extrusion cylinder 4 under the push of the subsequent mud strips. They are conveyed by the spiral blade 2 9 through the mold 5 and extruded. At this time, the sealing cylinder 2 and the secondary extrusion cylinder 4 are both sealed by mud strips. The pump is turned on to evacuate the vacuum chamber 3. The cutter 8 rotates to cut the mud strips in the vacuum chamber 3. After cutting, the gas in the mud strips is sucked away by the vacuum pump. The mud strips after subsequent pressing are more delicate and will not have holes.

[0025] There are multiple cutters 8, and the projections of any two cutters 8 along the axial direction of the conveying shaft 6 will not overlap, and the thickness of the cutter 8 is not greater than 3mm;

[0026] The thickness of the cutter 8 is no more than 3 mm, which is convenient for healing the cut cracks. The projections of any two cutters 8 along the axial direction of the conveying shaft 6 will not overlap, so that when the mud strips are cut, the density will not be uneven due to multiple cutters being inserted into one place at the same time.

[0027] The spiral blade 2 9 extends into the vacuum chamber 3;

[0028] The mud strips in the vacuum chamber 3 can enter the secondary extrusion cylinder 4 better.

[0029] The mold 5 includes a mold shell 51, a threaded ring 52 is connected to the feed end of the mold shell 51, a threaded ring groove is provided at the end of the secondary extrusion cylinder 4, the threaded ring 52 is threadedly connected to the threaded ring groove, and a hollow mold 53 is connected inside the mold shell 51;

[0030] The connection is completed by the threaded ring 52 and the threaded ring groove, so that mud and sand cannot enter the thread, and the mold can be easily replaced and disassembled.

[0031] The hollow mold 53 is composed of a plurality of L-shaped modules evenly distributed around the circumference, and the L-shaped module at the feed end of the mold housing 51 is provided with a taper angle 54;

[0032] The gangue mud is guided into the mold shell 51 by the cone angle 54 of the L-shaped module without any dead corners for siltation. The gangue mud is shaped by the hollow mold 53 and then extruded to complete the preparation of the hollow brick.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] 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 variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hollow gangue brick pressing and forming device, comprising: A primary extrusion cylinder (1), one end of which is connected to a sealing cylinder (2), the sealing cylinder (2) is connected to a vacuum chamber (3), the vacuum chamber (3) is connected to a secondary extrusion cylinder (4), the end of the secondary extrusion cylinder (4) is connected to a mold (5), the vacuum chamber (3) is connected to a pump, The invention is characterized in that: the primary extrusion cylinder (1), the vacuum chamber (3) and the secondary extrusion cylinder (4) are provided with a conveying shaft (6), the conveying shaft (6) is arranged concentrically with the primary extrusion cylinder (1), the inner bottom surface of the vacuum chamber (3) and the secondary extrusion cylinder (4), the conveying shaft (6) in the primary extrusion cylinder (1) is connected with a spiral blade 1 (7), the conveying shaft (6) in the vacuum chamber (3) is connected with a cutter (8), the conveying shaft (6) of the secondary extrusion cylinder (4) is connected with a spiral blade 2 (9), and the inner diameter of the outlet end of the sealing cylinder (2) is equal to the diameter of the inner bottom surface of the vacuum chamber (3) and the inner diameter of the secondary extrusion cylinder (4).

2. The device for pressing and forming hollow gangue bricks according to claim 1, characterized in that: A plurality of cutters (8) are provided, and projections of any two cutters (8) along the axial direction of the conveying shaft (6) do not overlap, and the thickness of the cutters (8) is no greater than 3 mm.

3. The device for pressing and forming hollow gangue bricks according to claim 1, characterized in that: The second spiral blade (9) extends into the vacuum chamber (3).

4. The device for pressing and forming hollow gangue bricks according to claim 1, characterized in that: The mold (5) comprises a mold shell (51), a feed end of the mold shell (51) is connected to a threaded ring (52), a threaded ring groove is provided at the end of the secondary extrusion cylinder (4), the threaded ring (52) is threadedly connected to the threaded ring groove, and a hollow mold (53) is connected inside the mold shell (51).

5. The device for pressing and forming hollow gangue bricks according to claim 4, characterized in that: The hollow mold (53) is composed of a plurality of L-shaped modules evenly distributed around the circumference, and the L-shaped module at the feed end of the mold shell (51) is provided with a taper angle (54).

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