A device for quantitatively placing coal powder for concrete block processing

Abstract

The invention discloses a device for quantitatively placing coal powder for concrete block processing, which belongs to the field of concrete blocks, and comprises a screening box, a quantitative frame and a driving device, wherein the quantitative frame is connected to the discharge port of the screening box, the quantitative frame and the screening box are both connected to the driving device, and the driving device is used to drive the quantitative frame to rotate to receive and discharge materials, and to drive the screening box to screen the coal powder. The invention solves the problem that the existing device takes a lot of time and has low efficiency when quantitatively placing coal powder.

Description

Technical Field

[0001] The invention belongs to the field of concrete blocks, and in particular relates to a coal powder quantitative placement device for processing concrete blocks. Background Art

[0002] Concrete blocks are man-made blocks made of concrete, industrial waste (slag, fly ash, etc.) or local materials. They are recyclable and green bricks. The fly ash in concrete blocks comes from the fine ash in the flue gas after the combustion of coal powder. When making concrete blocks, adding fly ash in a certain proportion can improve the performance of concrete blocks.

[0003] The inventors found in actual use that these prior arts have at least the following technical problems:

[0004] Patent number CN211418125U is a device for quantitatively placing coal powder for concrete block processing. By using a metering scale to weigh the fly ash inside the box, the problem of the existing device not being able to quantitatively place coal powder is solved. However, when weighing, the coal powder needs to enter the storage box, and then the metering scale is used to weigh it. After reaching the corresponding weight, the feeding is stopped, and then the valve is manually opened to allow the weighed coal powder to flow out. The whole process requires waiting for weighing and waiting for discharge, and requires manual opening and closing of valves and monitoring of materials, which takes a lot of time and is inefficient. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies, the inventors of the present invention have continuously reformed and innovated through long-term exploration and attempts, multiple experiments and efforts, and proposed a device for quantitatively placing coal powder for concrete block processing, which can solve the problem that the existing device takes a lot of time and has low efficiency when quantitatively placing coal powder.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a coal powder quantitative placement device for concrete block processing, which includes a screening box, a quantitative frame and a driving device, the quantitative frame is supported at the discharge port of the screening box, the quantitative frame and the screening box are connected to the driving device, and the driving device is used to drive the quantitative frame to rotate to receive and discharge materials, and to drive the screening box to screen the coal powder.

[0007] According to the device for quantitatively placing coal powder for concrete block processing described in the present invention, a further preferred technical solution is: the screening box includes: a box body and a sieve plate, a feed port and a discharge port are arranged on the box body, the sieve plate is arranged inside the box body, and the sieve plate is connected to a driving device for driving the sieve plate to shake up and down.

[0008] According to the device for quantitatively placing coal powder for processing concrete blocks of the present invention, a further preferred technical solution is that the screening box further comprises a guide plate, and the guide plate is arranged to be inclined toward one side of the discharge port.

[0009] According to the device for quantitatively placing coal powder for concrete block processing described in the present invention, its further preferred technical solution is: the driving device is installed on the base plate, and the driving device includes: a first guide block, which is vertically arranged on the base plate, and a first slide groove is arranged on the side wall of the first guide block; a first slider, which is slidably connected in the first slide groove, and a guide groove is arranged on the end of the first slider away from the first guide block; a cylinder, which is installed under the first slider, and the piston rod of the cylinder is fixedly connected to the first slider.

[0010] According to the device for quantitatively placing coal powder for concrete block processing described in the present invention, its further preferred technical solution is: the driving device is installed on the base plate, and the driving device includes: a first guide block, which is vertically arranged on the base plate, and a first slide groove is arranged on the side wall of the first guide block; a first slider, which is slidably connected in the first slide groove, and a guide groove is arranged on the end of the first slider away from the first guide block; a cylinder, which is installed under the first slider, and the piston rod of the cylinder is fixedly connected to the first slider; a driving rod, and the two ends of the driving rod are respectively fixedly connected to the first slider and the screen plate.

[0011] According to the device for quantitatively placing coal powder for processing concrete blocks described in the present invention, its further preferred technical solution is: the quantitative frame includes: a first gear, which cooperates with a paddle and rotates the first gear by moving the paddle; a second gear, which is arranged on one side of the first gear and meshes with the first gear; a connecting rod, which passes through the center of the second gear and is fixedly connected to the bottom plate; a fourth gear, which is fixedly arranged on the connecting rod and is an incomplete gear; a rotating frame, which is hinged on the connecting rod and can rotate and rotate around the connecting rod.

[0012] According to the device for quantitatively placing coal powder for concrete block processing described in the present invention, a further preferred technical solution is: the driving device also includes: a baffle rod, a baffle plate and a first spring, the baffle rod is arranged within the rotation range of the first gear and is located under the gear teeth of the first gear, the first spring is arranged in the baffle rod, the baffle plate is retractably arranged under the first gear through the first spring, and the shape of the top of the baffle plate cooperates with the first gear to stop the first gear from retreating.

[0013] According to the coal powder quantitative placement device for concrete block processing described in the present invention, its further preferred technical solution is: there are at least two rotating frames, and the quantitative frame also includes: a material receiving rod, which is horizontally arranged and hinged with the connecting rod; a material receiving box, which is fixedly arranged at the end of the material receiving rod; a bevel gear, the bevel gear is divided into a first bevel gear, a second bevel gear and a third bevel gear, the first bevel gear and the second bevel gear are relatively arranged on the connecting rod and are incomplete gears, and the third bevel gear is arranged below the two, and the first bevel gear and the second bevel gear are respectively meshed with the third bevel gear to control the rotation direction of the material receiving rod; the third gear is rotatably arranged on the second gear and arranged around the fourth gear, and when the third gear rotates to the position of the fourth gear teeth, the third gear is meshed with the fourth gear; a rotating rod, one end of which is fixedly connected to the third bevel gear, and the other end is arranged on the center of the third gear; a support rod, one end of which is connected to the material receiving rod, and the other end is connected to the rotating rod.

[0014] According to the device for quantitatively placing coal powder for processing concrete blocks described in the present invention, a further preferred technical solution is: a switch mechanism is arranged at the bottom of the discharge port, and the switch mechanism includes: a baffle, which is arranged at the discharge port and matches the shape of the discharge port; a baffle, which is fixedly arranged under the baffle; and a second spring, whose two ends are respectively fixedly connected to the baffle and the side wall of the discharge port, and is used to resist the baffle to keep the baffle in a normally closed state.

[0015] Compared with the prior art, the technical solution of the present invention has the following advantages / benefits:

[0016] The present invention is provided with a screening box, a quantitative frame and a driving device. Through the driving device, the screening box can screen out impurities and solidified coal powder, and the discharge is stable. At the same time, the driving device can drive the quantitative frame to simultaneously realize the action of receiving materials at the discharge port of the screening box on one side and pouring materials at a preset position on the other side. The two actions are alternated, saving the time of waiting for weighing and waiting for discharging, and improving efficiency. In addition, because the particle size of the coal powder is basically constant and the discharge time is also constant, the quality of the material received by the quantitative frame each time is basically the same, realizing the function of quantitative receiving, without the need for people to observe the numerical value of the measuring scale and judge the discharge of the coal powder by the measuring data, saving the time of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1The invention discloses a structural schematic diagram of a device for quantitatively placing coal powder for processing concrete blocks.

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the screening box of the present invention.

[0020] Figure 3 It is a schematic structural diagram of the driving device of the present invention.

[0021] Figure 4 It is a schematic diagram of the use of the switch mechanism and the material receiving box of the present invention.

[0022] Figure 5 It is a schematic diagram of the use of the anti-retraction structure of the present invention in cooperation with the first gear.

[0023] The marks in the figure are respectively: 1 screening box, 2 quantitative frame, 3 driving device, 4 bottom plate, 5 switch mechanism; 11 box body, 12 screen plate, 13 feed port, 14 discharge port, 15 guide plate; 30 driving rod, 31 first guide block, 32 first slider, 33 guide groove, 34 cylinder, 35 second guide block, 36 second slider, 37 protrusion, 38 paddle, 39 back-stop mechanism; 21 first gear, 22 second gear, 23 connecting rod, 24 fourth gear, 25 rotating frame; 251 receiving rod, 252 receiving box, 253 first bevel gear, 254 second bevel gear, 255 third bevel gear, 256 third gear, 257 rotating rod, 258 supporting rod; 51 baffle, 52 baffle, second spring (not shown); 391 baffle rod, 392 baffle, 393 first spring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in the subsequent drawings.

[0026] Example:

[0027] like Figures 1 to 5As shown, a device for quantitatively placing coal powder for concrete block processing comprises: a screening box 1, a driving device 3 and a quantitative frame 2. The quantitative frame 2 is received at the discharge port 14 of the screening box 1 for receiving coal powder; the driving device 3 is respectively connected to the quantitative frame 2 and the screening box 1, and is used to drive the quantitative frame 2 to rotate to receive and discharge materials, and to drive the screening box 1 to screen the coal powder, control the particle size of the coal powder and screen out impurities, thereby ensuring the discharge quality and at the same time ensuring that the coal powder mass flowing out per unit time is the same.

[0028] like Figure 2 As shown, the screening box 1 comprises: a box body 11, a sieve plate 12 and a guide plate 15. The box body 11 is a square structure with a hollow interior. A feed port 13 is provided at the top of the box body 11, and the feed port 13 is communicated with the interior of the box body 11. A discharge port 14 is provided at the bottom of the box body 11, and the discharge port 14 is communicated with the interior of the box body 11. A slide rail is provided on the inner wall of the box body 11, and the sieve plate 12 is provided inside the box body 11 and slides up and down along the slide rail. The guide plate 15 is tilted at the bottom end of the box body 11, and the tilted lower end of the guide plate 15 is aligned with the discharge port 14, so that the coal powder flows out from the discharge port 14. That is, the coal powder enters the interior of the box body 11 through the feed port 13, and then falls on the guide plate 15 after being screened by the sieve plate 12, and slides to the discharge port 14 along the tilted surface of the guide plate 15.

[0029] The sieve plate 12 is connected to the driving device 3, and the driving device 3 controls the sieve plate 12 to shake up and down, thereby accelerating the screening speed and also helping to break up the coal powder agglomerates. Figure 1 and Figure 3 As shown, the driving device 3 is installed on the bottom plate 4, and includes: the bottom plate 4, the first guide block 31, the second guide block 35, the first slider 32, the second slider 36, the stop mechanism 39 and the driving rod 30. The first guide block 31 is a square structure and is vertically arranged on the bottom plate 4; a first slide groove is arranged on the side wall of the first guide block 31, and the first slider 32 is a square structure matching the first slide groove, and is slidably arranged on the first guide block 31 through the first slide groove; a cylinder 34 is arranged on the bottom plate 4 below the first slider 32, and the output shaft of the cylinder 34 is fixedly connected to the bottom of the first slider 32, and the first slider 32 can be driven to move up and down along the first slide groove through the cylinder 34; a driving rod 30 is arranged on the top of the first slider 32, and the end of the driving rod 30 away from the first slider 32 passes through the screening box 1 and is fixedly connected to the bottom of the sieve plate 12. When the first slider 32 slides up and down, it drives the driving rod 30 to move, thereby moving the sieve plate 12 up and down.

[0030] More preferably, a guide groove 33 is provided on the side wall of the first slider 32 away from the first slide groove, and the guide groove 33 is provided along the diagonal line of the square side wall of the first slider 32. A second guide block 35 is also provided on the side of the first slider 32 away from the first slide groove, and the second guide block 35 is horizontally installed on the first guide block 31; a second slide groove is provided on the second guide block 35, and the second slide groove is perpendicular to the first slide groove; the second slider 36 is slidably provided in the second slide groove, and a protrusion 37 is provided at one end of the second slider 36 close to the guide groove 33, and the protrusion 37 cooperates with the guide groove 33. When the first slider 32 moves up and down, the protrusion 37 moves in the guide groove 33, so that the second slider 36 moves back and forth along the second slide groove.

[0031] Preferably, a paddle 38 and a spring are provided on the second slider 36 , wherein the spring is provided inside the second slider 36 , and the paddle 38 is connected to the second slider 36 via the spring, that is, the paddle 38 can be extended and ejected when the second slider 36 moves.

[0032] The quantitative frame 2 is connected to one side of the driving device 3, and the quantitative frame 2 can be driven to rotate by the paddle 38. The quantitative frame 2 includes a first gear 21, a second gear 22, a connecting rod 23, a fourth gear 24 and a rotating frame 25. The first gear 21 cooperates with the paddle 38, and the paddle 38 can drive the first gear 21 to rotate when it moves. The second gear 22 is located on one side of the first gear 21 and meshes with the first gear 21. The rotation of the first gear 21 drives the second gear 22 to rotate. The connecting rod 23 passes through the center of the second gear 22 and is fixedly connected to the bottom plate 4, that is, the connecting rod 23 does not rotate with the second gear 22.

[0033] When the paddle 38 moves to one side, it drives the first gear 21 to rotate, but the paddle 38 has a return motion. To prevent the first gear 21 from reversing when the paddle 38 returns, the present invention is provided with a back-stop mechanism 39. Figure 5 As shown, the anti-retraction mechanism 39 includes a blocking rod 391, a blocking piece 392 and a first spring 393. The blocking rod 391 is located within the rotation range of the first gear 21 and under the gear teeth of the first gear 21. The first spring 393 is arranged in the groove at the top of the blocking rod 391. The blocking piece 392 is located at the top of the blocking rod 391 and is fixedly connected to the first spring 393, that is, the blocking piece 392 is retractably arranged under the first gear 21 through the first spring 393. More preferably, a serrated structure is arranged under the first gear 21, and the shape of the top of the blocking piece 392 matches the serrated structure of the first gear 21, that is, the blocking piece 392 can make the first gear 21 rotate in one direction. If the first gear 21 rotates in the other direction, the blocking piece 392 can hinder the first gear 21, which is used to prevent the first gear 21 from retreating.

[0034] The connecting rod 23 is hinged with a rotating frame 25, and the rotating frame 25 includes: a third gear 256, a support rod 258, a material receiving rod 251, a rotating rod 257, a material receiving box 252 and a bevel gear. The material receiving rod 251 is horizontally hinged on the connecting rod 23, and a material receiving box 252 is fixedly arranged at the end of the connecting rod 23. The bevel gears are divided into a first bevel gear 253, a second bevel gear 254 and a third bevel gear 255. The first bevel gear 253 and the second bevel gear 254 are relatively arranged on the connecting rod 23 and are incomplete gears. The third bevel gear 255 is arranged below the first bevel gear 253 and the second bevel gear 254 are respectively meshed with the third bevel gear 255, so that the rotation direction of the material receiving rod 251 can be controlled. A rotating rod 257 is fixedly arranged below the third bevel gear 255. The rotation of the rotating rod 257 can drive the third bevel gear 255 to rotate. When the first bevel gear 253 is meshed with the third bevel gear 255, the material receiving rod 251 rotates, causing the material receiving box 252 to tilt to one side to pour the material. When the second bevel gear 254 is meshed with the third bevel gear 255, the material receiving rod 251 rotates in the opposite direction, causing the material receiving box 252 to return to the normal state. In order to make the material receiving rod 251 rotate around the connecting rod 23 together with the rotating rod 257 and realize relative rotation, the present invention is provided with a support rod 258, and the two ends of the support rod 258 are respectively connected to the material receiving rod 251 and the rotating rod 257.

[0035] The bottom of the rotating rod 257 is arranged at the center of the third gear 256, and the rotating rod 257 is driven to rotate by the rotation of the third gear 256. The third gear 256 is fixedly connected to the second gear 22, that is, when the second gear 22 rotates, the third gear 256 is driven to rotate around the center of the second gear 22. A fourth gear 24 is arranged at the center of the second gear 22, and the fourth gear 24 is fixed and is an incomplete gear. When the third gear 256 rotates to the part of the fourth gear 24 with gear teeth, it will mesh with the fourth gear 24, thereby realizing the rotation of the third gear 256.

[0036] It should be noted that, in order to simultaneously complete the material unloading and material receiving actions, at least two rotating racks 25 are symmetrically arranged, in this embodiment, there are two rotating racks 25, but it can also be arranged to be three, four, five or six according to the situation. The proportion of the gear teeth of the incomplete gear in the present invention can be determined according to the actual situation.

[0037] like Figure 4As shown, a switch mechanism 5 is also provided at the bottom of the discharge port 14, and the switch mechanism 5 is used in conjunction with the rotating frame 25. The switch mechanism 5 includes: a baffle 51, a baffle 52 and a second spring (not shown). The baffle 51 is provided at the discharge port 14 and matches the shape of the discharge port 14, and is used to block the discharge port 14. The baffle 52 is fixedly provided under the baffle 51, and the baffle 52 can interfere with the material receiving box 252. When the material receiving box 252 rotates to the baffle 52, the baffle 52 and the baffle 51 can be driven to move to one side, thereby opening the discharge port 14. When the material receiving box 252 continues to rotate, the baffle 52 and the baffle 51 continue to move until the baffle 52 is no longer in the rotation range of the rotating frame 25, and at this time, the material receiving box 252 does not interfere with the baffle 52. The two ends of the second spring are fixedly connected to the stopper 52 and the side wall of the discharge port 14 respectively, and are used to resist the stopper 52 to keep the baffle 51 in a normally closed state. When the receiving box 252 rotates to no longer interfere with the stopper 52, under the action of the spring, the stopper 52 drives the baffle 51 to return to the normal state and close the discharge port 14.

[0038] When in use, the cylinder 34 is started, and the cylinder 34 drives the first slider 32 to reciprocate in the first guide block 31, so that the driving rod 30 drives the screen plate 12 to move up and down in the screening box 1 to screen the coal powder. The coal powder falls onto the guide plate 15 and waits for the discharge port 14 to open.

[0039] When the cylinder 34 is started, the first slider 32 drives the second slider 36 to move in the second guide block 35, so that the paddle 38 drives the first gear 21 to rotate, and the first gear 21 is meshed with the second gear 22, driving the second gear 22 to rotate, and then the rotating rod 257 drives the receiving rod 251 and the receiving box 252 to rotate around the connecting rod 23. At this time, there are two states on the rotating frame 25:

[0040] Material receiving state: the paddle 38 moves forward, pushing the first gear 21 and the second gear 22 to rotate, and the material receiving box 252 on one side rotates to the material outlet 14, and interferes with the stopper 52, pushing the baffle 51 to open the material outlet 14, at this time, the paddle 38 starts to return, the material receiving box 252 remains stationary, and the coal powder falls into the material receiving box 252. The paddle 38 continues to move forward, and continues to drive the material receiving box 252 to rotate, so that the material receiving box 252 does not interfere with the stopper 52, and the stopper 52 drives the baffle 51 to close the material outlet 14 under the action of the spring.

[0041] Material unloading state: the paddle 38 moves forward, pushing the first gear 21 and the second gear 22 to rotate. At this time, the third gear 256 is located at the position where the fourth gear 24 has gear teeth, and the third gear 256 is meshed with the fourth gear 24, so that the third gear 256 rotates around the connecting rod 23 while rotating on its own. The third gear 256 rotates on its own, driving the rotating rod 257 to rotate on its own, so that the third bevel gear 255 is meshed with the first bevel gear 253 or the second bevel gear 254 in turn, that is, the receiving box 252 first tilts to one side to unload the material, maintains the tilted posture, and then returns to the normal position to prepare for receiving the material again.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A device for quantitatively placing coal powder for concrete block processing, characterized in that: It includes a screening box, a quantitative frame and a driving device. The quantitative frame is connected to the discharge port of the screening box. The quantitative frame and the screening box are connected to the driving device. The driving device is used to drive the quantitative frame to rotate to receive and discharge materials, and to drive the screening box to screen coal powder. The quantitative frame includes: a first gear, which cooperates with a paddle and rotates the first gear by moving the paddle; a second gear, which is arranged on one side of the first gear and meshes with the first gear; a connecting rod, which passes through the center of the second gear and is fixedly connected to the bottom plate; a fourth gear, which is fixedly arranged on the connecting rod and is an incomplete gear; a rotating frame, which is hinged on the connecting rod and can rotate and self-rotate around the connecting rod; There are at least two rotating frames, and the quantitative frame also includes: a material receiving rod, which is horizontally arranged and hinged with the connecting rod; a material receiving box, which is fixedly arranged at the end of the material receiving rod; a bevel gear, which is divided into a first bevel gear, a second bevel gear and a third bevel gear, the first bevel gear and the second bevel gear are relatively arranged on the connecting rod and are incomplete gears, and the third bevel gear is arranged below the two, and the first bevel gear and the second bevel gear are respectively meshed with the third bevel gear to control the rotation direction of the material receiving rod; the third gear is rotatably arranged on the second gear and arranged around the fourth gear, and when the third gear rotates to the position of the fourth gear teeth, the third gear is meshed with the fourth gear; a rotating rod, one end of which is fixedly connected to the third bevel gear, and the other end is arranged on the center of the third gear; a support rod, one end of which is connected to the material receiving rod, and the other end is connected to the rotating rod.

2. A device for quantitatively placing coal powder for concrete block processing according to claim 1, characterized in that: The screening box comprises: a box body and a sieve plate, the box body is provided with a feed port and a discharge port, the sieve plate is arranged inside the box body, and the sieve plate is connected to a driving device for driving the sieve plate to shake up and down.

3. A device for quantitatively placing coal powder for concrete block processing according to claim 2, characterized in that: The screening box also includes a guide plate, and the guide plate is arranged to be inclined toward one side of the discharge port.

4. A device for quantitatively placing coal powder for concrete block processing according to claim 3, characterized in that: The driving device is installed on the base plate, and the driving device includes: a first guide block, which is vertically arranged on the base plate, and a first slide groove is arranged on the side wall of the first guide block; a first slider, which is slidably connected in the first slide groove, and a guide groove is arranged on the end of the first slider away from the first guide block; a cylinder, which is installed under the first slider, and the piston rod of the cylinder is fixedly connected to the first slider; a driving rod, and both ends of the driving rod are respectively fixedly connected to the first slider and the screen plate.

5. The device for quantitatively placing coal powder for concrete block processing according to claim 4, characterized in that: The driving device also includes: a second guide block, which is vertically installed on the side wall of the first guide block and is provided with a second slide groove; a second slider, which is slidably connected in the second slide groove; a protrusion, which is arranged on the side of the second slider close to the first slider, and the protrusion cooperates with the guide groove. When the protrusion moves in the guide groove, it drives the second slider to move in the second slide groove; and a paddle, which is telescopically installed on the second slider.

6. The device for quantitatively placing coal powder for concrete block processing according to claim 1, characterized in that: The driving device also includes a back-stop mechanism, which includes: a baffle rod, a baffle plate and a first spring. The baffle rod is arranged within the rotation range of the first gear and is located under the gear teeth of the first gear. The first spring is arranged in the baffle rod. The baffle plate is retractably arranged under the first gear through the first spring. The shape of the top of the baffle plate cooperates with the bottom of the first gear to stop the first gear from backing off.

7. The device for quantitatively placing coal powder for concrete block processing according to claim 1, characterized in that: A switch mechanism is provided at the bottom of the discharge port, and the switch mechanism includes: a baffle, which is provided at the discharge port and matches the shape of the discharge port; a baffle, which is fixedly provided under the baffle; and a second spring, whose two ends are respectively fixedly connected to the baffle and the side wall of the discharge port, and is used to resist the baffle to keep the baffle in a normally closed state.

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