A porous sintered brick extruder

Abstract

The application provides a porous sintered brick extruder, relates to the field of brick making equipment, and comprises a feeding hopper, an extrusion cylinder, an extrusion screw, a screw driving part, an extrusion die and a heating unit. The extrusion cylinder is formed with an extrusion cavity. The feeding hopper is communicated with the extrusion cavity. The extrusion screw is arranged in the extrusion cavity. One end of the extrusion screw extends from one end of the extrusion cylinder and is connected with the screw driving part. The extrusion die is connected with the other end of the extrusion cylinder. The other end of the extrusion screw is rotatably connected to the end of the extrusion cylinder close to the extrusion die. The heating unit is arranged outside the extrusion die. The application has the effect of conveniently controlling the water content of the extruded green bricks, so that the extruded green bricks are not prone to deformation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of brick making equipment, and particularly relates to a porous sintered brick extruder. BACKGROUND

[0002] The sintered brick extruder is a device for producing brick materials, which can extrude and form the brick making raw materials such as clay, shale, coal gangue and fly ash mixed with water, and continuously output the brick blanks to be cut. The sintered brick extruder has the characteristics of fast production speed.

[0003] Generally, in order to facilitate the extrusion of the brick blank, more water is added to the brick making raw materials. Therefore, after the sintered brick extruder extrudes the brick making raw materials to form the continuous brick blank (especially the brick blank of the hollow brick), the brick blank is prone to collapse deformation due to the large water content, and the end of the brick hole in the hollow brick blank is also prone to be blocked during the subsequent cutting process of the brick blank.

[0004] Therefore, there is a need for a porous sintered brick extruder. SUMMARY

[0005] In order to improve the problem that the extruded brick blank is prone to deformation and collapse due to the large water content, the present application provides a porous sintered brick extruder.

[0006] The porous sintered brick extruder provided by the present application adopts the following technical scheme: a porous sintered brick extruder, comprising a feeding hopper, an extrusion cylinder, an extrusion screw, a screw driving member, an extrusion die head and a heating unit, the extrusion cylinder is formed with an extrusion cavity, the feeding hopper is in communication with the extrusion cavity, the extrusion screw is arranged in the extrusion cavity, one end of the extrusion screw extends from one end of the extrusion cylinder and is connected with the screw driving member, the extrusion die head is connected with the other end of the extrusion cylinder, the other end of the extrusion screw is rotatably connected to the end of the extrusion cylinder close to the extrusion die head, and the heating unit is sleeved outside the extrusion die head.

[0007] By adopting the above technical scheme, the heating unit arranged outside the extrusion die head can heat the brick making raw materials passing through the extrusion die head, so that the temperature of the extruded brick blank is high, which is beneficial to the evaporation of water in the brick blank, thereby reducing the water content in the brick blank, improving the strength of the brick blank, and preventing the deformation of the brick blank. Since the brick blank of the hollow brick has a brick hole structure, the water vapor evaporated from the brick blank of the hollow brick can be discharged along the brick hole, thereby preventing the deformation of the brick blank and reducing the water content in the brick blank, especially in the brick hole. Therefore, the brick blank is not prone to deformation during the subsequent cutting process, and the end face of the brick hole is not prone to be blocked and has high finishing degree.

[0008] Further, a humidity sensor is arranged at the joint of the feeding hopper and the extrusion cavity, and the humidity sensor is electrically connected with a controller, and the controller is also electrically connected with the heating unit, so as to control the start-stop and heating temperature of the heating unit.

[0009] By using the above technical scheme, the humidity of the brick-making raw material in the feeding hopper can be detected, so as to determine whether the heating unit needs to be started and the heating temperature according to the humidity, thereby facilitating the adjustment and control of the moisture in the green brick.

[0010] Further, an air supply unit is arranged at the outlet end of the extrusion die, the air supply unit comprises a blower and a gas equalizing ring, the blower is connected with the gas equalizing ring, the green brick extruded from the outlet end of the extrusion die can pass through the gas equalizing ring, and a gas outlet groove is arranged on the side of the gas equalizing ring facing the green brick.

[0011] By using the above technical scheme, the water loss speed of the surface of the green brick can be accelerated, so that the surface of the green brick can be hardened quickly, thereby avoiding the collapse of the green brick.

[0012] Specifically, the extrusion screw comprises rotating shafts arranged at both ends, an extrusion thread and an eccentric extrusion rod, the two rotating shafts are coaxially arranged and the rotating shafts of the two rotating shafts coincide with the central axis of the extrusion cavity, the eccentric extrusion rod is eccentrically arranged with the rotating shafts, and the extrusion thread is arranged around the eccentric extrusion rod and coaxially arranged with the eccentric extrusion rod.

[0013] By using the above technical scheme, a high-pressure area and a low-pressure area can be formed in the extrusion cavity by the eccentric extrusion rod, so as to extrude the brick-making raw material from the high-pressure area to the low-pressure area, thereby avoiding the situation that the brick-making raw material is stuck in the extrusion cavity.

[0014] Specifically, the end of the extrusion cylinder close to the extrusion die is provided with a screw rod support frame, the screw rod support frame comprises a support ring and a plurality of support rods, one end of each support rod is connected with the support ring, the other end is connected with the inner wall of the extrusion cylinder, and the center of the support ring is located on the central axis of the extrusion cavity.

[0015] By using the above technical scheme, the support of the extrusion screw can be formed.

[0016] Specifically, the side of the support rod away from the extrusion die is provided with a support frame distribution protrusion strip protruding away from the extrusion die, and the side of the support rod close to the extrusion die is provided with a support frame convergence protrusion strip protruding towards the extrusion die.

[0017] By adopting the above technical scheme, the brick-making raw materials can be first divided by the dividing convex strips of the support frame when passing through the support rod, so that the force of the brick-making raw materials on the support rod in the direction of the extrusion die during movement can be reduced, so that the support rod is not easy to break; after the brick-making raw materials pass through the dividing convex strips of the support frame, they will be gathered together along the surface of the gathering convex strips of the support frame, so that the formation of cavities in the brick-making raw materials after passing through the support rod can be prevented.

[0018] Specifically, the extrusion die comprises an extrusion section, a forming section and a hole forming die, one end of the extrusion section is connected with the extrusion cylinder, the other end is connected with the forming section, and the hole forming die is arranged between the extrusion cylinder and the extrusion section.

[0019] By adopting the above technical scheme, the brick-making raw materials will be extruded by the inner wall of the extrusion section when passing through the extrusion section, so that the bonding strength between the brick-making raw materials can be improved, and the extruded brick billets have higher strength and are not easy to deform; the forming section can limit the extruded brick-making raw materials to a set shape.

[0020] Specifically, the hole forming die comprises a support mesh plate and a hole forming die rod, the support mesh plate comprises an edge frame strip and a plurality of warp support strips and weft support strips connected in the edge frame strip, a die rod connecting portion is arranged at the connection between the warp support strips and the weft support strips, and the hole forming die rod is detachably connected with the die rod connecting portion.

[0021] By adopting the above technical scheme, the hole forming die rod can be fixed at a set position by the support mesh plate, so that the hole forming die rod can form brick holes in the brick billets.

[0022] Specifically, the edge frame strip abuts between the extrusion cylinder and the extrusion section, the side of the warp support strips and the weft support strips away from the extrusion die is provided with mesh plate dividing convex strips protruding away from the extrusion die, and the side of the warp support strips and the weft support strips close to the extrusion die is provided with mesh plate gathering convex strips protruding towards the extrusion die.

[0023] By adopting the above technical scheme, the force of the brick-making raw materials on the support mesh plate in the direction of the extrusion section during movement can be reduced by the mesh plate dividing convex strips, so that the support mesh plate is not easy to be damaged; after the brick-making raw materials pass through the support mesh plate, they will move and gather together along the surface of the mesh plate gathering convex strips under the extrusion of the inner wall of the extrusion section, so that the layered phenomenon in the extruded brick billets can be prevented.

[0024] Specifically, the sealing frame strips, the warp support strips and the weft support strips are all provided with air inlets, the hole-forming die rod is provided with an air outlet running through the length direction of the hole-forming die rod, and the sealing frame strip is also provided with an air inlet, the air inlet is connected to the air inlet, and the air inlet is connected to the air outlet.

[0025] By adopting the above technical solution, it is possible to facilitate ventilation into the brick holes of the brick blank, so as to bring out the water vapor in the brick blank through the brick holes.

[0026] In summary, this application has at least one of the following beneficial effects:

[0027] 1. The brick-making raw materials passing through the extrusion die can be heated by a heating unit arranged on the outside of the extrusion die, so that the temperature of the extruded bricks is higher, which is conducive to the evaporation of water in the bricks, thereby reducing the water content in the bricks, thereby improving the strength of the bricks and making the bricks less likely to deform; since the hollow bricks have a brick hole structure, the water vapor evaporated from the hollow bricks can be discharged along the brick holes, which is not easy to cause the deformation of the bricks, and the moisture inside the bricks, especially at the brick holes, can also be reduced. Therefore, when the bricks are subsequently cut, the inside of the bricks is also less likely to deform, so that the end faces of the brick holes are not easily blocked and have a higher smoothness;

[0028] 2. The design of the air supply unit can accelerate the water loss rate of the brick surface, so that the surface of the brick can harden faster. The design of the air inlet in the supporting mesh and the air outlet in the hole-forming mold rod can facilitate ventilation to the brick holes of the brick, so as to bring out the water vapor in the brick through the brick holes, making it less likely for the brick to collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional diagram of a porous sintered brick extruder of the present application;

[0030] Figure 2 yes Figure 1 A vertical cross-sectional view of a porous sintered brick extruder, showing the specific structure inside the extrusion barrel;

[0031] Figure 3 yes Figure 2 Enlarged view of area A in the middle;

[0032] Figure 4 yes Figure 2 A cross-sectional view taken along the middle BB direction, showing the screw support frame and the support mesh plate;

[0033] Figure 5 yes Figure 4 A cross-sectional view taken in the CC direction showing the cross-sections of the support rods and warp support bars.

[0034] Explanation of reference numerals: 1. Feed hopper; 2. Extrusion barrel; 21. Extrusion chamber; 22. Screw support frame; 221. Support ring; 222. Support rod; 2221. Support frame material separation rib; 2222. Support frame material collection rib; 3. Extrusion screw; 31. Rotating shaft; 32. Extrusion thread; 33. Eccentric extrusion rod; 4. Screw drive; 5. Extrusion die; 51. Extrusion section; 52. Forming section; 53. Hole-forming die; 531. Support mesh plate ; 5311, sealing frame strip; 5312, warp support strip; 5313, weft support strip; 5314, mold rod connection part; 5315, mesh plate material dividing convex strip; 5316, mesh plate material collecting convex strip; 5317, air inlet; 5318, air inlet; 532, hole forming mold rod; 5321, air outlet; 6, heating unit; 7, humidity sensor; 8, controller; 9, air supply unit; 91, blower; 92, air equalizing ring; 921, air outlet groove. DETAILED DESCRIPTION

[0035] Figure 1 This is a three-dimensional diagram of a porous sintered brick extruder of the present application. Figure 2 yes Figure 1 A vertical cross-sectional view of a porous sintered brick extruder in FIG. 1 shows the specific structure inside the extrusion barrel. Figure 1 and Figure 2 The porous sintered brick extruder provided in this application includes a feed hopper 1, an extrusion barrel 2, an extrusion screw 3, a screw drive 4, an extrusion die 5 and a heating unit 6. Specifically, an extrusion chamber 21 suitable for accommodating brick-making raw materials is formed in the extrusion barrel 2. The feed hopper 1 is arranged at one end of the extrusion barrel 2 and is connected to the extrusion chamber 21 to facilitate the supply of brick-making raw materials into the extrusion chamber 21.

[0036] The extrusion screw 3 is arranged in the extrusion chamber 21, and one end of the extrusion screw 3 extends from one end of the extrusion barrel 2 and is connected to the screw driver 4 (the screw driver 4 can be a driving motor), the extrusion die 5 is connected to the other end of the extrusion barrel 2, and the other end of the extrusion screw 3 is rotatably connected to the end of the extrusion barrel 2 close to the extrusion die 5, so that the extrusion screw 3 can rotate in the extrusion chamber 21 under the drive of the screw driver 4, thereby driving the brick-making raw materials in the extrusion chamber 21 to move toward the extrusion die 5. When passing through the extrusion die 5, the brick-making raw materials can be extruded into brick blanks under the extrusion action of the extrusion die 5 and the extrusion screw 3.

[0037] In addition, the heating unit 6 is sleeved outside the extrusion die 5, so that the brick raw materials passing through the extrusion die 5 can be heated by the heating unit 6, so that the water on the surface of the extruded green brick can be easily evaporated, so as to reduce the water in the green brick, so that the green brick is not easy to deform and collapse. It can be understood that the water vapor evaporated from the green brick of the hollow brick can be discharged along the brick hole, so that the deformation of the green brick is not easy to occur, and the water in the interior of the green brick, especially the brick hole, can also be reduced, so that the internal deformation of the green brick is also not easy to occur during subsequent cutting of the green brick, so that the end face of the brick hole is not easy to be blocked and has high finishing degree.

[0038] As shown in Figure 2 In order to facilitate detection of the moisture in the brick raw materials, the porous sintered brick extruder of the application further comprises a humidity sensor 7 and a controller 8. The humidity sensor 7 can be arranged at the connection between the feeding hopper 1 and the extrusion cavity 21, so as to detect the water content of the brick raw materials entering the extrusion cavity 21. The humidity sensor 7 is electrically connected with the controller 8, so as to transmit the humidity (water content) value detected by the humidity sensor 7 to the controller 8. The controller 8 is further electrically connected with the heating unit 6, so that the controller 8 can control the start-stop and heating temperature of the heating unit 6 according to the humidity (water content) value. If the humidity (water content) value is less than or equal to the set green brick water content value, the heating unit 6 is not started. If the humidity (water content) value is greater than the set green brick water content value, the heating unit 6 is started. The greater the humidity (water content) value, the greater the heating temperature of the heating unit 6. However, the heating temperature of the heating unit 6 needs to be less than 95℃, so as to prevent a large amount of water in the brick raw materials from evaporating, so that the extruded green brick contains a large number of air pockets and air chambers, causing the green brick to be unqualified.

[0039] Specifically, as shown in Figure 2 The heating unit 6 sleeved outside the extrusion die 5 is a sleeve structure matched with the shape of the extrusion die 5. The sleeve structure forms a containing cavity suitable for containing a heating medium. The sleeve structure is provided with a liquid inlet and a liquid outlet communicating with the containing cavity. The sleeve structure is connected with a circulating electric heater through the liquid inlet and the liquid outlet. The heating medium can be heated and circulated by the circulating electric heater, so as to heat the extrusion die 5. The circulating electric heater is a prior art and will not be described here.

[0040] As shown in Figure 1 and Figure 2As shown, the porous sintered brick extruder of the present application further comprises an air supply unit 9 arranged at the outlet end of the extrusion die 5. The air supply unit 9 can be provided with a blower 91 and an air equalizing ring 92. The blower 91 is connected to the air equalizing ring 92. The green bricks extruded from the outlet end of the extrusion die 5 can pass through the air equalizing ring 92. An air outlet groove 921 is arranged on the side of the air equalizing ring 92 facing the green bricks. The air blown by the blower 91 can be uniformly blown to the outer surface of the green bricks, thereby accelerating the water loss rate of the surface of the green bricks and hardening the surface of the green bricks quickly, so that the green bricks are less likely to collapse.

[0041] Referring to Figure 2 , specifically, the extrusion screw 3 comprises rotating shafts 31 arranged at both ends, an extrusion thread 32 and an eccentric extrusion rod 33. The two rotating shafts 31 are coaxially arranged and the rotating shafts 31 of the two rotating shafts 31 coincide with the central axis of the extrusion cavity 21, so as to ensure the stability of the extrusion screw 3 during rotation and prevent scratching of the extrusion cavity 21. The eccentric extrusion rod 33 is arranged eccentrically with the rotating shaft 31. The extrusion thread 32 is arranged around the eccentric extrusion rod 33 and coaxially arranged with the eccentric extrusion rod 33, so that the distance between the extrusion thread 32 and the inner wall of the extrusion cylinder 2 remains unchanged during rotation of the extrusion screw 3. This can avoid changes in the distance between the extrusion thread 32 and the inner wall of the extrusion cylinder 2, so that the extrusion thread 32 cannot effectively push the brick-making raw materials when the distance between the extrusion thread 32 and the inner wall of the extrusion cylinder 2 is large. The eccentric extrusion rod 33 can form high-pressure and low-pressure zones in the extrusion cavity 21, so as to push the brick-making raw materials from the high-pressure zone to the low-pressure zone, thereby preventing the brick-making raw materials from being stuck in the extrusion cavity 21.

[0042] Figure 3 is Figure 2 an enlarged view of the A area in Figure 4 is Figure 2 a sectional view in the B-B direction in Figure 3 and Figure 4 As shown, the extrusion cylinder 2 needs to be provided with a screw rod support frame 22 at the end close to the extrusion die 5 to support the extrusion screw 3. Specifically, the screw rod support frame 22 comprises a support ring 221 and a plurality of support rods 222. One end of each support rod 222 is connected to the support ring 221, and the other end is connected to the inner wall of the extrusion cylinder 2. The center of the support ring 221 is located on the central axis of the extrusion cavity 21.

[0043] Figure 5 is Figure 4 a sectional view in the C-C direction in Figure 5The side of the supporting rod 222 away from the extrusion die head 5 is provided with a supporting frame distribution protrusion 2221 protruding away from the extrusion die head 5, and the side of the supporting rod 222 close to the extrusion die head 5 is provided with a supporting frame collection protrusion 2222 protruding close to the extrusion die head 5, so that the brick-making raw materials can be first distributed by the supporting frame distribution protrusion 2221 when passing through the supporting rod 222, thereby reducing the force applied by the brick-making raw materials to the supporting rod 222 in the moving process towards the extrusion die head 5, so that the supporting rod 222 is not easy to break; after the brick-making raw materials pass through the supporting frame distribution protrusion 2221, they will be collected together along the surface of the supporting frame collection protrusion 2222, thereby preventing the brick-making raw materials from forming a cavity inside after passing through the supporting rod 222.

[0044] Referring to Figure 3 and Figure 5 , the extrusion die head 5 includes an extrusion section 51, a forming section 52 and a hole forming die 53. One end of the extrusion section 51 is connected with the extrusion cylinder 2, and the other end is connected with the forming section 52. The hole forming die 53 is arranged between the extrusion cylinder 2 and the extrusion section 51. When the brick-making raw materials pass through the extrusion section 51, they will be extruded by the inner wall of the extrusion section 51, which can improve the bonding strength between the brick-making raw materials, so that the extruded green bricks have higher strength and are not easy to deform. The forming section 52 can extrude and limit the brick-making raw materials into a set shape.

[0045] As shown in Figure 2 and Figure 3 , specifically, the hole forming die 53 can be provided to include a supporting mesh plate 531 and a hole forming die rod 532. The supporting mesh plate 531 includes a sealing frame strip 5311 and a plurality of warp supporting strips 5312 and weft supporting strips 5313 connected in the sealing frame strip 5311. The connecting part of the warp supporting strips 5312 and the weft supporting strips 5313 is provided with a die rod connecting part 5314. The die rod connecting part 5314 can be a sleeve structure, and is provided with an internal thread structure. A matching external thread structure is arranged at one end of the hole forming die rod 532, so as to realize detachable connection between the hole forming die rod 532 and the die rod connecting part 5314. The hole forming die rod 532 can be fixed at a set position by the supporting mesh plate 531, so as to form a brick hole in the green brick by the hole forming die rod 532.

[0046] As shown in Figure 3 , the part of the extrusion die head 5 connected with the extrusion cylinder 2 can be provided as a flange structure, and the sealing frame strip 5311 can also be provided as a flange structure, so that the sealing frame strip 5311 can abut between the extrusion cylinder 2 and the extrusion section 51, facilitating the connection between the extrusion cylinder 2 and the supporting mesh plate 531 and the extrusion die head 5.

[0047] In addition, referring to Figure 5The far side of the warp supporting strip 5312 and the weft supporting strip 5313 away from the extrusion die head 5 is provided with a mesh plate distribution convex strip 5315 protruding away from the extrusion die head 5, and the side of the warp supporting strip 5312 and the weft supporting strip 5313 close to the extrusion die head 5 is provided with a mesh plate convergence convex strip 5316 protruding towards the extrusion die head 5. The mesh plate distribution convex strip 5315 can reduce the force of the brick raw materials on the supporting mesh plate 531 during movement, so that the supporting mesh plate 531 is not easy to be damaged. After the brick raw materials pass through the supporting mesh plate 531, they will move along the surface of the mesh plate convergence convex strip 5316 under the extrusion of the inner wall of the extrusion section 51 and converge together, so as to ensure that there is no delamination in the extruded brick blank, so as to ensure the quality of the brick blank.

[0048] As shown in FIGS. Figure 3 and Figure 4 As shown in FIGS.

[0049] The working principle of a porous sintered brick extruder according to the present application is as follows:

[0050] The heating unit 6 arranged outside the extrusion die head 5 can heat the brick raw materials passing through the extrusion die head 5, so that the temperature of the extruded brick blank is higher, thereby facilitating the evaporation of water in the brick blank, reducing the water content in the brick blank, and improving the strength of the brick blank, so that the brick blank is not easy to deform.

[0051] The design of the air supply unit 9 can accelerate the water loss rate of the green brick surface, so that the surface of the green brick can be hardened faster. The design of the air inlet 5317 in the support net plate 531 and the air outlet 5321 in the hole forming die rod 532 can facilitate air supply to the brick hole of the green brick, so as to facilitate the removal of water vapor in the green brick through the brick hole, thereby preventing the green brick from collapsing, and reducing the moisture in the interior of the green brick, especially at the brick hole, so that the green brick is also less likely to deform during subsequent cutting, thereby preventing the end face of the brick hole from being blocked and having a higher finishing degree.

[0052] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered by the protection scope of the present application.

Claims

1. A porous sintered brick extruder characterized by, The extrusion die (5) comprises an extrusion section (51), a forming section (52) and a hole forming die (53), one end of the extrusion section (51) is connected with the extrusion cylinder (2), the other end is connected with the forming section (52), and the hole forming die (53) is arranged between the extrusion cylinder (2) and the extrusion section (51); The hole forming die (53) comprises a support net plate (531) and a hole forming die rod (532), the support net plate (531) comprises an edge sealing frame strip (5311) and a plurality of warp support strips (5312) and weft support strips (5313) connected in the edge sealing frame strip (5311), a die rod connecting part (5314) is arranged at the connection position of the warp support strips (5312) and the weft support strips (5313), and the hole forming die rod (532) is detachably connected with the die rod connecting part (5314); The edge sealing frame strip (5311) is abutted between the extrusion cylinder (2) and the extrusion section (51), the sides of the warp support strips (5312) and the weft support strips (5313) away from the extrusion die (5) are provided with net plate distribution convex strips (5315) protruding away from the extrusion die (5), and the sides of the warp support strips (5312) and the weft support strips (5313) close to the extrusion die (5) are provided with net plate convergence convex strips (5316) protruding close to the extrusion die (5); The edge sealing frame strip (5311), the warp support strips (5312) and the weft support strips (5313) are all provided with air inlet channels (5317), the hole forming die rod (532) is provided with an air outlet channel (5321) penetrating in the length direction of the hole forming die rod (532), the edge sealing frame strip (5311) is further provided with an air inlet (5318), the air inlet (5318) is communicated with the air inlet channel (5317), and the air inlet channel (5317) is communicated with the air outlet channel (5321). ​ 2. A porous sintered brick extruder according to claim 1, wherein Further comprising a humidity sensor (7) and a controller (8), the humidity sensor (7) is arranged at the connection between the feeding hopper (1) and the extrusion cavity (21), and the humidity sensor (7) is electrically connected with the controller (8), and the controller (8) is also electrically connected with the heating unit (6) to control the start-stop and heating temperature of the heating unit (6).

3. A porous sintered brick extruder according to claim 1 or 2, characterised in that Further comprising a blowing unit (9) arranged at the outlet end of the extrusion die (5), the blowing unit (9) comprises a blower (91) and a gas distribution ring (92), the blower (91) is connected with the gas distribution ring (92), the green bricks extruded from the outlet end of the extrusion die (5) can pass through the gas distribution ring (92), and the side of the gas distribution ring (92) facing the green bricks is provided with an air outlet groove (921).

4. A porous sintered brick extruder as claimed in claim 1, wherein, The extrusion screw (3) comprises rotating shafts (31) arranged at both ends, an extrusion thread (32) and an eccentric extrusion rod (33); the two rotating shafts (31) are coaxially arranged and their rotating shafts coincide with the central axis of the extrusion cavity (21), the eccentric extrusion rod (33) is eccentrically arranged with the rotating shaft (31), and the extrusion thread (32) is arranged around the eccentric extrusion rod (33) and coaxially arranged with the eccentric extrusion rod (33).

5. A porous sintered brick extruder according to claim 4, wherein One end of the extrusion cylinder (2) close to the extrusion die (5) is provided with a screw support frame (22), the screw support frame (22) comprises a support ring (221) and a plurality of support rods (222), one end of each support rod (222) is connected with the support ring (221), the other end is connected with the inner wall of the extrusion cylinder (2), and the center of the support ring (221) is located on the central axis of the extrusion cavity (21).

6. A porous sintered brick extruder according to claim 5, wherein The side of the support rod (222) away from the extrusion die (5) is provided with a support frame distribution protrusion (2221) protruding away from the extrusion die (5), and the side of the support rod (222) close to the extrusion die (5) is provided with a support frame convergence protrusion (2222) protruding towards the extrusion die (5).

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