Multi-stage crushing raw material crusher for concrete production

Abstract

The application relates to the technical field of concrete production crushing, in particular to a multi-stage crushing raw material crusher for concrete production, which comprises an outer shell, a supporting and discharging base connected below the outer shell, an inlet frame connected above the outer shell, belt pulleys installed on the outer sides of the front and rear ends of an eccentric shaft, a fixed jaw plate installed on the left inner wall of the outer shell, a bearing plate arranged in the middle part of the outer shell, an eccentric shaft penetratingly connected in the upper part of the bearing plate, a movable jaw plate body installed on the left side of the bearing plate, a pushing plate for pushing and blocking raw materials connected in the inner part of the inlet frame, and an auxiliary crushing plate for distributing raw materials connected below the pushing plate. The multi-stage crushing raw material crusher for concrete production can slow down the falling speed of part of the raw materials in the inlet frame, avoid the accumulation of a large amount of raw materials falling together, and make the raw materials fall uniformly to various positions, so that the quality and efficiency of multi-stage crushing can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete production crushing, in particular to a raw material crusher for concrete production capable of multi-stage crushing. BACKGROUND

[0002] Concrete is made of sand, stone aggregate and cement and other raw materials through mixing and stirring. Before mixing and stirring, a crusher is used to crush the raw materials into appropriate particle size to meet the needs of concrete production.

[0003] For example, the patent with the patent name "Multi-stage environment-friendly concrete waste crushing device" disclosed in the prior art with the publication number "CN111468272A" discloses that the piston rod of the hydraulic cylinder is extended to push the two extrusion plates to move close to each other to extrude and crush the concrete through the two extrusion plates. The concrete is crushed into small pieces, and the steel bars and other metals in the concrete are separated from the concrete. At this time, the electromagnet is turned on, the electromagnet generates strong magnetism, and the steel bars and other metal objects in the crushed concrete are attracted and held, thereby realizing the separation of the steel bars and the concrete. After the initial crushing of the concrete is completed, the air cylinder is started in reverse, the piston rod of the air cylinder is retracted, the support plates are turned downward, the lower parts of the two support plates are opened, the small pieces of concrete fall to the bottom of the crushing box at this time, the driving motor is started, the output shaft of the driving motor drives the rotating shaft to rotate through the meshing connection of the first bevel gear and the second bevel gear, the rotating shaft drives the crushing rod to rotate at high speed, and the concrete is crushed again. For example, the patent with the patent name "Multi-stage raw material crushing device for asphalt concrete production" disclosed in the prior art with the publication number "CN210522631U" discloses that when in use, the single-shaft motor and the double-shaft motor are started, the raw materials to be crushed are added through the feeding port, the raw materials are first crushed by the first crushing structure, then enter the second crushing structure through the first discharge port at the bottom of the crushing box for deep crushing, the raw materials crushed by the crushing disc meet the size and enter the crushing ball for fine crushing through the filter screen on the second discharge port, and the raw materials that do not pass through are stacked on the second fixed plate and are driven to enter the crushing area of the crushing disc again for secondary crushing through the continuous brushing of the brushing plate. After crushing is completed, the control valve is controlled to unload the discharge port.

[0004] The crusher in the above-mentioned prior art can achieve multi-stage crushing effect through the cooperation of the first crushing structure and the second crushing structure. However, since the raw materials directly fall from the feeding port through the first crushing structure for preliminary crushing, the raw materials may be accumulated on the first crushing structure, and the raw materials cannot be uniformly distributed on the first crushing structure, thereby affecting the preliminary crushing effect and efficiency, and the multi-stage crushing operation cannot be well performed. Therefore, the present application provides a raw material crusher for concrete production capable of multi-stage crushing to solve the above-mentioned problems. SUMMARY

[0005] The present application aims to provide a raw material crusher for concrete production capable of multi-stage crushing to solve the problem that the raw material may be accumulated on the first crushing structure and cannot be evenly distributed on the first crushing structure, thereby affecting the preliminary crushing effect and efficiency and failing to perform multi-stage crushing operation.

[0006] To achieve the above object, the present application provides the following technical scheme: a raw material crusher for concrete production capable of multi-stage crushing, comprising an outer shell, a supporting and discharging base connected below the outer shell, an inlet frame connected above the outer shell, an eccentric shaft connected through the upper middle position of the outer shell, a belt pulley mounted on the outer side of the front and rear ends of the eccentric shaft, a fixed jaw plate mounted on the left inner wall of the outer shell, a bearing plate arranged inside the middle part of the outer shell, an eccentric shaft connected through the inside of the upper part of the bearing plate, a moving jaw plate body mounted on the left side of the bearing plate, a pushing plate connected inside the inlet frame for pushing and blocking the raw material, and an auxiliary crushing plate connected below the pushing plate for distributing the raw material.

[0007] Preferably, the bottom surface of the outer shell is provided in an open shape, the inside of the supporting and discharging base is provided in a hollow shape, an adjusting block is mounted inside the right side surface of the outer shell, and the adjusting block is connected with the bearing plate through a thrust plate on the left side.

[0008] Preferably, a single-rotation reciprocating screw rod is rotatably connected through the slotted groove at the middle position inside the upper surface of the inlet frame, a pushing plate is threadedly connected to the outside of the single-rotation reciprocating screw rod, and the lower outside surface of the pushing plate is arranged in abutment with the inner side wall of the inlet frame.

[0009] Preferably, a chute is symmetrically provided inside the upper surface of the inlet frame, a row of self-pushing control blocks is installed at equal intervals in the chute, the outside of the self-pushing control blocks is provided in an arc shape, and the left and right sides of the self-pushing control blocks are provided in an inclined shape.

[0010] Preferably, two through grooves are symmetrically provided inside the pushing plate, a moving column is arranged through the through grooves, a circular-shaped limiting slide block is fixed to the upper outside of the moving column, the diameter of the limiting slide block is greater than the width of the through groove, the lower surface of the limiting slide block is in abutment contact with the upper surface of the pushing plate, an auxiliary crushing plate is fixed to the lower end of the moving column in an inclined shape, the upper end of the moving column is inserted into the chute in abutment contact with the outside of the self-pushing control block, the moving column constitutes a front and rear reciprocating sliding structure through the self-pushing control block, and a return spring is installed in the through groove and connected to the moving column at the other end.

[0011] Preferably, a crushing column in a conical shape is mounted to the outside of the auxiliary crushing plate.

[0012] Preferably, the auxiliary breaking plate is composed of the pushing plate and reciprocally moves left and right.

[0013] Preferably, the middle part of the eccentric shaft is connected with a protective frame outside, the upper end of the protective frame is connected with the inner wall of the upper surface of the outer shell, the transmission vertical rod is rotatably installed inside the upper surface of the outer shell, the upper and lower ends of the transmission vertical rod are connected with the right end of the single-rotation reciprocating screw rod and the middle part outside of the eccentric shaft through the bevel gear sets, and the bevel gear set of the lower end of the transmission vertical rod is arranged in the protective frame.

[0014] Preferably, the moving jaw body is composed of a first moving jaw, a second moving jaw and a third moving jaw, the first moving jaw, the second moving jaw and the third moving jaw are sequentially installed on the left side of the bearing plate from bottom to top, the first moving jaw is fixedly installed with the bearing plate, and the second moving jaw and the third moving jaw are both slidably connected with the bearing plate through the air pushing control assembly.

[0015] Preferably, the air pushing control assembly comprises two groups of cylindrical air pushing frames installed in the bearing plate, each group is provided with two air pushing frames, the inside of the air pushing frame is connected with a piston column, one end of the piston column in the two groups of air pushing frames penetrates the bearing plate and is connected with the second moving jaw and the third moving jaw, respectively, the right end of the two air pushing frames in each group is connected with a shunt pipe in the shape of "U", the two shunt pipes are connected through a connecting hose in the shape of "T", and the right end of the connecting hose penetrates the right side of the outer shell and is connected with the pump body outside.

[0016] Compared with the prior art, the raw material crusher for concrete production with multi-stage crushing can slow down the falling speed of part of the raw materials in the feeding frame, avoid the accumulation of too many raw materials falling together, and make the raw materials fall uniformly to each position, so that the quality and efficiency of multi-stage crushing can be improved.

[0017] (1) The left and right reciprocating movement of the pushing plate can shield and position part of the raw materials in the feeding frame, so as to slow down the falling speed of part of the raw materials in the feeding frame, avoid the accumulation of too many raw materials falling together, and through the left and right reciprocating movement of the auxiliary breaking plate in the shape of an inclined plate, the raw materials in the middle part of the feeding frame can be shunted and fallen to the front and back sides, so that the raw materials can fall uniformly to each position, and thus the quality and efficiency of multi-stage crushing can be improved.

[0018] Further, through the arrangement of the arc-shaped self-pushing control block outside, the mobile column and the auxiliary breaking plate can be driven to move reciprocally forward and backward, so that the auxiliary breaking plate and the feeding frame can preliminarily crush part of the raw materials.

[0019] (2) The air push control assembly can drive the second moving jaw plate and the third moving jaw plate to move, so as to further adjust the distance between the second moving jaw plate, the third moving jaw plate and the fixed jaw plate, thereby facilitating the adjustment of the swing amplitude of the second moving jaw plate and the third moving jaw plate, and then the crushing degree of the moving jaw plate body can be adjusted, so that the crusher can crush raw materials with high hardness with high strength, thereby not only meeting different crushing needs, but also improving the efficiency of multi-stage crushing and shortening the time required for crushing;

[0020] (3) The upper end and the lower end of the transmission vertical rod are connected with the single-rotation reciprocating screw rod and the eccentric shaft through the conical gear sets respectively, energy is saved, and the conical gear set at the lower end of the transmission vertical rod can be protected through the protection frame to avoid the contact between dust generated by crushing and the conical gear set. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a three-dimensional structure schematic diagram of the present application;

[0022] Figure 2 It is a main view structure schematic diagram of the inside of the outer shell body of the present application;

[0023] Figure 3 It is a bottom view structure schematic diagram of the inside of the outer shell body of the present application;

[0024] Figure 4 It is a connection structure schematic diagram of the transmission vertical rod and the eccentric shaft of the present application;

[0025] Figure 5 It is a main cross-sectional view structure schematic diagram of the feeding frame of the present application;

[0026] Figure 6 It is a connection cross-sectional view structure schematic diagram of the feeding frame and the single-rotation reciprocating screw rod of the present application;

[0027] Figure 7 It is a three-dimensional structure schematic diagram of the pushing plate of the present application;

[0028] Figure 8 It is a connection cross-sectional view structure schematic diagram of the pushing plate and the moving column of the present application;

[0029] Figure 9 It is a left view structure schematic diagram of the moving jaw plate body in the second embodiment of the present application;

[0030] Figure 10 It is a main view structure schematic diagram of the moving jaw plate body in the second embodiment of the present application;

[0031] Figure 11 It is a connection structure schematic diagram of the moving jaw plate body and the piston column in the second embodiment of the present application.

[0032] In the figure: 1, the outer shell; 2, support the blanking base; 3, eccentric shaft; 4, pulley; 5, transmission vertical rod; 6, feed frame; 7, single rotation reciprocating screw; 8, bearing plate; 9, moving jaw plate body; 91, the first moving jaw plate; 92, the second moving jaw plate; 93, the third moving jaw plate; 10, fixed jaw plate; 11, adjustment block; 12, thrust plate; 13, protection frame; 14, push plate; 141, through slot; 15, auxiliary crushing plate; 16, self-push control block; 17, sliding slot; 18, moving column; 181, limit slide block; 182, return spring; 19, shunt pipe; 20, connecting hose; 21, air push frame; 22, piston column. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] Please refer to Figures 1-11 , the present application provides the following technical solutions:

[0035] Embodiment one: the raw material crusher for concrete production with multi-stage crushing in the embodiment can control the discharging amount of raw materials in the feed frame 6 and control the uniformity of raw material falling, so as to improve the quality and crushing efficiency of multi-stage crushing in the later stage. For specific structure, please refer to the accompanying drawings Figures 1-8 shown, which comprises an outer shell 1 and a supporting and discharging base 2 connected below the outer shell 1, the upper part of the outer shell 1 is connected with a feed frame 6, the upper middle part of the outer shell 1 is through-connected with an eccentric shaft 3, the front and rear ends of the eccentric shaft 3 are both installed with pulleys 4, the left inner wall of the outer shell 1 is installed with a fixed jaw plate 10, the middle part of the inner part of the outer shell 1 is provided with a bearing plate 8, the upper part of the bearing plate 8 is through-connected with the eccentric shaft 3, the left side of the bearing plate 8 is installed with a moving jaw plate body 9, the inside of the feed frame 6 is connected with a push plate 14 for pushing and blocking raw materials, the lower part of the push plate 14 is connected with an auxiliary crushing plate 15 for shunting raw materials, the bottom surface of the outer shell 1 is provided in an open manner, the inside of the supporting and discharging base 2 is provided in a hollow manner, the inside of the right side surface of the outer shell 1 is installed with an adjustment block 11, the left side of the adjustment block 11 is connected with the bearing plate 8 through a thrust plate 12, the middle part of the inside of the upper surface of the feed frame 6 is grooved and rotationally connected with a single rotation reciprocating screw 7, the outside of the single rotation reciprocating screw 7 is threadedly connected with the push plate 14, and the lower outside surface of the push plate 14 is fitted with the inside wall of the feed frame 6.

[0036] The upper surface of the feeding frame 6 is symmetrically provided with a chute 17, and a row of self-propelled control blocks 16 is installed in the chute 17 at equal intervals. The outer side of the self-propelled control block 16 is arc-shaped, and the left and right sides of the self-propelled control block 16 are inclined. The feeding plate 14 is symmetrically provided with two through grooves 141, and a moving column 18 is penetratingly arranged in the through groove 141. The upper outer side of the moving column 18 is fixedly provided with a circular limiting sliding block 181, and the diameter of the limiting sliding block 181 is greater than the width of the through groove 141. The lower surface of the limiting sliding block 181 is in contact with the upper surface of the feeding plate 14. The lower end of the moving column 18 is fixedly provided with an auxiliary crushing plate 15 arranged in an inclined manner. The upper end of the moving column 18 is inserted into the chute 17 and in contact with the outer side of the self-propelled control block 16. The moving column 18 forms a front and back reciprocating sliding structure through the self-propelled control block 16. A return spring 182 is installed in the through groove 141, and the other end of the return spring 182 is connected with the moving column 18. The outer side of the auxiliary crushing plate 15 is provided with a conical crushing column. The auxiliary crushing plate 15 forms a left and right reciprocating movement through the feeding plate 14. The outer side of the middle part of the eccentric shaft 3 is penetratingly connected with a protective frame 13. The upper end of the protective frame 13 is connected with the inner wall of the upper surface of the outer shell 1. The upper and lower ends of the transmission vertical rod 5 are respectively connected with the right end of the single-rotation reciprocating screw rod 7 and the outer side of the middle part of the eccentric shaft 3 through the conical gear sets. The conical gear set at the lower end of the transmission vertical rod 5 is arranged in the protective frame 13.

[0037] Firstly, the raw materials needed for concrete production are transported into the feeding frame 6 by external conveying mechanism, and then the raw materials fall between the moving jaw plate body 9 and the fixed jaw plate 10 in the outer shell 1 through the feeding frame 6 with an inclined bottom surface. At this time, the external motor is started, and the external motor drives the belt pulley 4 and the eccentric shaft 3 to rotate. At this time, the eccentric shaft 3 drives the moving jaw plate body 9 to reciprocally move towards the fixed jaw plate 10, so that the fixed jaw plate 10 cooperates with the moving jaw plate body 9 to crush the raw materials. At this time, the adjusting block 11 and the thrust plate 12 can ensure that the moving jaw plate body 9 stably performs the crushing operation. This part is prior art and will not be described in detail. At the same time, when the eccentric shaft 3 rotates, it drives the transmission vertical rod 5 to rotate through the bevel gear set. The upper end of the transmission vertical rod 5 drives the single-rotation reciprocating screw rod 7 to rotate through the bevel gear set. Since the eccentric shaft 3 penetrates through the front and rear sides of the protection frame 13, and the bevel gear set connected between the eccentric shaft 3 and the lower end of the transmission vertical rod 5 is arranged in the protection frame 13, the protection frame 13 can protect the bevel gear set at the lower end of the transmission vertical rod 5, so as to avoid the contact between the dust generated during crushing of the raw materials and the bevel gear set connected to the lower end of the transmission vertical rod 5. When the single-rotation reciprocating screw rod 7 rotates, the outer thread-connected pushing plate 14 moves left and right in the feeding frame 6. Therefore, the pushing plate 14 can push and limit part of the raw materials in the feeding frame 6. The height of the pushing plate 14 is equal to two-thirds of the height of the left end of the feeding frame 6, so that the pushing plate 14 can well limit the height of the materials falling to the right in the feeding frame 6, thereby avoiding the accumulation of all the raw materials in the feeding frame 6.

[0038] The pushing plate 14 drives the moving column 18 and the auxiliary crushing plate 15 to move back and forth, and the auxiliary crushing plate 15 is inclined, so that the raw materials in the middle of the feeding frame 6 are divided into two parts and fall to the front and rear, so that the raw materials fall uniformly, avoiding the raw materials from being accumulated in one place and affecting the later multi-stage crushing operation. When the moving column 18 moves back and forth, the upper end of the moving column 18 is in contact with the plurality of self-pushing control blocks 16 in the chute 17 in sequence. When the moving column 18 is in contact with the self-pushing control block 16, the self-pushing control block 16 with an arc-shaped outer side can push the moving column 18 inward, and the moving column 18 slides in the through slot 141. At this time, the reset spring 182 is energized, the diameter of the limiting sliding block 181 is greater than the width of the through slot 141, so that the limiting sliding block 181 is prevented from being separated from the through slot 141, and the bottom surface of the limiting sliding block 181 is provided with a ball, so that the friction between the limiting sliding block 181 and the pushing plate 14 is reduced, and the moving column 18 is stably moved. When the moving column 18 is separated from the self-pushing control block 16, the moving column 18 and the auxiliary crushing plate 15 are automatically moved outward by the energy of the reset spring 182. At this time, the two auxiliary crushing plates 15 move to the front and rear inner walls of the feeding frame 6, respectively, so that the auxiliary crushing plate 15 cooperates with the feeding frame 6 to preliminarily crush part of the raw materials, and then the preliminarily crushed raw materials fall uniformly between the fixed jaw plate 10 and the moving jaw plate body 9 for secondary crushing. Finally, the crushed raw materials fall downward through the open-bottomed outer shell 1 and the hollow support and discharging base 2, and the outer side of the auxiliary crushing plate 15 is provided with a crushing column in a conical shape, which can improve the crushing efficiency of the auxiliary crushing plate 15.

[0039] The shortest distance between the two adjacent self-pushing control blocks 16 is greater than the diameter of the moving column 18, so that the moving column 18 can slide forward and backward with a large amplitude, so that the moving column 18 drives the auxiliary crushing plate 15 to move forward and backward with a large range, so as to facilitate the auxiliary crushing plate 15 to preliminarily crush the raw materials.

[0040] In the embodiment, the gas-pushing control assembly can control the swinging amplitude of the moving jaw plate body 9, so as to adjust the crushing strength, improve the crushing efficiency of the raw material crusher, and shorten the crushing time. For details, refer to the specific structure of the raw material crusher for producing concrete in the embodiment and the drawings. Figures 1-2 and the drawings. Figures 9-11As shown, the moving jaw body 9 is composed of a first moving jaw 91, a second moving jaw 92 and a third moving jaw 93, which are installed on the left side of the bearing plate 8 from bottom to top, the first moving jaw 91 is fixedly installed with the bearing plate 8, and the second moving jaw 92 and the third moving jaw 93 are both slidably connected with the bearing plate 8 through the air push control assembly, the air push control assembly includes two groups of cylindrical air push frames 21 installed in the bearing plate 8, each group has two air push frames 21, the inside of the air push frame 21 is connected with a piston column 22, one end of the piston column 22 in the two groups of air push frames 21 penetrates through the bearing plate 8 and is connected with the second moving jaw 92 and the third moving jaw 93 respectively, the right end of the two air push frames 21 in each group is connected with a "U"-shaped shunt pipe 19, the two shunt pipes 19 are connected through a "T"-shaped connecting hose 20, and the right end of the connecting hose 20 penetrates through the right side of the outer shell 1 and is connected with the pump body outside.

[0041] In the first embodiment, since the size of the eccentric shaft 3 is fixed, the swing amplitude of the moving jaw body 9 driven by the eccentric shaft 3 is also fixed, so that the crushing strength of the moving jaw body 9 is fixed. Therefore, on the basis of the first embodiment, when the moving jaw body 9 performs the crushing operation, the connecting hose 20 can penetrate through the right side of the outer shell 1 and be connected with the pump body outside for controlling gas delivery and gas extraction. When the moving jaw body 9 approaches the fixed jaw 10 to perform the crushing operation, the pump body delivers gas into the four groups of air push frames 21 through the connecting hose 20 and the shunt pipe 19, which automatically pushes the piston column 22 in the air push frame 21 to move the second moving jaw 92 and the third moving jaw 93 in the direction of the fixed jaw 10. Thus, the distance between the second moving jaw 92, the third moving jaw 93 and the fixed jaw 10 can be shortened, so as to change the swing amplitude of the second moving jaw 92 and the third moving jaw 93, thereby increasing the crushing strength of the second moving jaw 92 and the third moving jaw 93. Then, the crushed raw materials of the second moving jaw 92 and the third moving jaw 93 are crushed by the first moving jaw 91, so as to improve the crushing strength and crushing efficiency of the crusher on the raw materials with high hardness. When the moving jaw body 9 is away from the fixed jaw 10 and does not perform the crushing operation, the pump body performs air extraction. As described above, the piston column 22 in the air push frame 21 automatically drives the second moving jaw 92 and the third moving jaw 93 to reset, so as to be used for the next crushing operation.

[0042] In the third embodiment, the raw material crusher for concrete production with multi-stage crushing can use an external motor to replace the transmission vertical rod 5, and the right end of the single-rotation reciprocating screw rod 7 can be directly connected with the external motor through a shaft coupling. At this time, the external motor directly drives the single-rotation reciprocating screw rod 7 to rotate.

[0043] Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can be modified, or some of the technical features can be replaced by equivalent features, by those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A raw material crusher for concrete production capable of multi-stage crushing, comprising an outer shell (1), a supporting and discharging base (2) connected below the outer shell (1), and a feeding frame (6) connected above the outer shell (1). characterized in that An eccentric shaft (3) is connected through the upper middle part of the outer shell (1), belt pulleys (4) are mounted on the outer sides of the front and rear ends of the eccentric shaft (3), a fixed jaw plate (10) is mounted on the left inner wall of the outer shell (1), a bearing plate (8) is arranged inside the middle part of the outer shell (1), the eccentric shaft (3) is connected through the inside of the upper part of the bearing plate (8), a moving jaw plate body (9) is mounted on the left side of the bearing plate (8), a pushing plate (14) for pushing and blocking raw materials is connected inside the feeding frame (6), and an auxiliary crushing plate (15) for distributing raw materials is connected below the pushing plate (14). A single-rotation reciprocating screw rod (7) is rotatably connected through the slotted middle part of the inside of the upper surface of the feeding frame (6), the pushing plate (14) is threadedly connected to the outer side of the single-rotation reciprocating screw rod (7), and the outer side of the pushing plate (14) is arranged in abutment with the inner side wall of the feeding frame (6). A chute (17) is symmetrically formed in the inside of the upper surface of the feeding frame (6), a row of self-pushing control blocks (16) are equidistantly mounted in the chute (17), the outer side of the self-pushing control block (16) is arranged in an arc shape, and the left and right sides of the self-pushing control block (16) are arranged in an inclined shape. Two through grooves (141) are symmetrically formed in the inside of the pushing plate (14), a moving column (18) is arranged through the through grooves (141), a limiting sliding block (181) in a circular shape is fixed to the outer side of the upper part of the moving column (18), the diameter of the limiting sliding block (181) is greater than the width of the through groove (141), the lower surface of the limiting sliding block (181) is in abutment with the upper surface of the pushing plate (14), the auxiliary crushing plate (15) is fixed to the lower end of the moving column (18) in an inclined shape, the upper end of the moving column (18) is inserted into the chute (17) and in abutment with the outer side of the self-pushing control block (16), the moving column (18) constitutes a front and back reciprocating sliding structure through the self-pushing control block (16), and a return spring (182) is mounted in the through groove (141) and connected to the moving column (18) at the other end.

2. The raw material crusher for producing concrete, which can crush in multiple stages according to claim 1, characterized in that: The bottom surface of the outer shell (1) is arranged in an open shape, the inside of the supporting and discharging base (2) is arranged in a hollow shape, an adjusting block (11) is mounted to the inside of the right side surface of the outer shell (1), and the adjusting block (11) is connected to the bearing plate (8) through a thrust plate (12) at the left side.

3. The raw material crusher for producing concrete, which can crush in multiple stages according to claim 1, characterized in that: A crushing column in a conical shape is mounted to the outer side of the auxiliary crushing plate (15).

4. The raw material crusher for producing concrete, which can crush in multiple stages according to claim 1, characterized in that: The auxiliary crushing plate (15) constitutes left and right reciprocating movement through the pushing plate (14).

5. The raw material crusher for producing concrete, which can crush in multiple stages according to claim 1, characterized in that: The eccentric shaft (3) is connected with a protective frame (13) at the middle outer side, the upper end of the protective frame (13) is connected with the inner wall of the upper surface of the outer shell (1), the transmission vertical rod (5) is rotatably installed in the upper surface of the outer shell (1), the upper and lower ends of the transmission vertical rod (5) are connected with the right end of the single-rotation reciprocating screw rod (7) and the middle outer side of the eccentric shaft (3) through the bevel gear sets, and the bevel gear set at the lower end of the transmission vertical rod (5) is arranged in the protective frame (13).

6. The raw material crusher for producing concrete, which can crush in multiple stages according to claim 1, characterized in that: The movable jaw plate body (9) is composed of a first movable jaw plate (91), a second movable jaw plate (92) and a third movable jaw plate (93), the first movable jaw plate (91), the second movable jaw plate (92) and the third movable jaw plate (93) are sequentially installed on the left side of the bearing plate (8) from bottom to top, the first movable jaw plate (91) is fixedly installed with the bearing plate (8), and the second movable jaw plate (92) and the third movable jaw plate (93) are both slidably connected with the bearing plate (8) through the air push control assembly.

7. A raw material crusher for concrete production capable of multi-stage crushing according to claim 6, characterized in that: The air push control assembly includes two groups of cylindrical air push frames (21) installed in the bearing plate (8), each group is provided with two air push frames (21), the inside of the air push frame (21) is connected with a piston column (22), one end of the piston column (22) in the two groups of air push frames (21) penetrates through the bearing plate (8) and is connected with the second movable jaw plate (92) and the third movable jaw plate (93), respectively, the right end of the two air push frames (21) in each group is connected with a "U"-shaped shunt pipe (19), the two shunt pipes (19) are connected through a "T"-shaped connecting hose (20), and the right end of the connecting hose (20) penetrates through the right side of the outer shell (1) and is connected with the pump body outside.

Images