A concrete mix mortar sieving-out apparatus

Abstract

The utility model discloses a kind of for concrete mixture mortar screening-out equipment, including frame, the frame upper portion is elastically connected with vibrating screen cylinder by vibrating screen cylinder big spring, the vibrating screen cylinder inside is horizontally provided with standard sieve, the standard sieve bottom is supported by fixed chassis, the fixed chassis both sides are attached with vibrating screen cylinder inner wall, and fixed chassis is magnetically fixed with the magnetic attraction fixed hole of vibrating screen cylinder side wall opening by magnetic attraction fixed block, frame one side is equipped with DC motor one, DC motor one output shaft hinged swing bar one end, swing bar other end hinged fixed rod middle part, fixed rod is welded with vibrating screen cylinder side, the utility model separates mortar by double vibration, mortar is into mixing pot through funnel, DC motor two drives stirring structure to mix, double flushing cleaning after test, realize mortar high -efficient screening, uniform mixing, and flushing dead angleless, operation automation, guarantee test accuracy.

Description

Technical Field

[0001] This utility model relates to the field of concrete mixture testing technology, specifically a mortar screening device for concrete mixtures. Background Technology

[0002] In concrete mixture performance testing, mortar screening is a key step in evaluating concrete mix proportions and workability. Existing concrete mortar screening equipment suffers from the following technical challenges: Low and incomplete mortar screening efficiency: Traditional equipment often uses a single mechanical vibration drive with a fixed vibration frequency and poor amplitude control, resulting in insufficient separation of aggregates and mortar in the concrete mixture. Some fine mortar adheres to the aggregate surface and cannot be screened, affecting the accuracy of test data. Poor mortar mixing uniformity and easy adhesion to the walls: Screened mortar needs subsequent mixing to meet test requirements, but existing mixing structures often use a single mixing blade, which cannot adhere to the inner wall of the mixing pot. Mortar easily adheres to the pot wall, forming residues, leading to uneven mixing and increased cleaning difficulty. Incomplete equipment rinsing after testing: Existing rinsing structures only use external nozzles, failing to cover the inner side of the mixing blades, the bottom of the mixing pot, and other dead corners. Residual concrete hardens and contaminates the next test sample, and manual cleaning is time-consuming and labor-intensive. Low automation and cumbersome operation: Each component of the equipment (vibration, mixing, rinsing) requires individual manual control, lacking a unified control unit. The operation steps are numerous, and parameters cannot be adjusted according to the type of concrete mixture, resulting in poor adaptability. Utility Model Content

[0003] The purpose of this invention is to provide a mortar screening device for concrete mixtures, in order to solve the problems mentioned in the background art, such as low and incomplete screening efficiency, poor mixing uniformity and easy adhesion to the wall, incomplete rinsing and low degree of automation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a mortar screening device for concrete mixtures, comprising a frame, a vibrating screen cylinder elastically connected to the upper part of the frame via a large spring, a standard screen horizontally arranged inside the vibrating screen cylinder, the bottom of the standard screen being supported by a fixed base frame, the two sides of the fixed base frame being in contact with the inner wall of the vibrating screen cylinder, and the fixed base frame being magnetically fixed to the vibrating screen cylinder by magnetic fixing blocks and magnetic fixing holes opened on the side wall of the vibrating screen cylinder, a DC motor being installed on one side of the frame, the output shaft of the DC motor being hinged to one end of a swing arm, and the other end of the swing arm being hinged to a fixed rod. The vibrating screen cylinder has a fixed rod welded to its side. An inner groove is formed in the lower part of the inner wall of the vibrating screen cylinder. An electromagnet is fixed inside the inner groove, and a coil is wound around the outside of the electromagnet. An electromagnetic block is slidably arranged inside the inner groove, and an outer spring is fitted around the outside of the electromagnetic block. The two ends of the outer spring abut against one side of the electromagnetic block and the inner groove, respectively. The electromagnetic block contacts the bottom of the outer wall of the vibrating screen cylinder. A funnel is connected to the bottom of the vibrating screen cylinder, and small springs are distributed on the outer side of the funnel. A mixing pot is connected below the funnel and is fixed in the middle of the frame. A mixing pot is located at the bottom of the mixing pot. The mixing pot has an inwardly inclined bottom plate. A hollow stirring rod is vertically inserted through the center of the bottom of the mixing pot. Stirring blades and a scraping arc plate are welded to the outer wall of the hollow stirring rod. The scraping arc plate fits against the inner wall of the mixing pot. A second DC motor is installed at the bottom of the mixing pot. An external gear is fitted onto the output shaft of the second DC motor, meshing with an internal gear. The internal gear is keyed to the inner wall of the hollow stirring rod. A sealing gasket is provided between the hollow stirring rod and the bottom of the mixing pot. A pneumatic telescopic rod is installed on the lower rear side of the mixing pot. The output end of the pneumatic telescopic rod is hinged to the rear of the receiving box. An inclined lower plate is located on the lower front side of the mixing pot. One end of the inclined lower plate is connected to the discharge port of the mixing pot, and the other end extends to the top of the receiving box at the bottom of the frame. A sieve is provided on the inclined lower plate. A high-pressure water pump is installed on the other side of the frame. The water inlet of the high-pressure water pump is connected to the water inlet pipe, and the water outlet of the high-pressure water pump is connected to the connecting pipe. The connecting pipe branches into the water outlet pipe, and the end of the water outlet pipe is equipped with a nozzle. The nozzle is aimed at the inside of the vibrating screen cylinder and the inside of the mixing pot. A control valve is provided on the water outlet pipe. A controller is also fixed on one side of the frame. The controller is electrically connected to DC motor one, DC motor two, electromagnet, pneumatic telescopic rod and high-pressure water pump respectively.

[0005] As a preferred technical solution of this utility model, the standard sieve is made of stainless steel, and multiple positioning holes are evenly opened on the upper surface of the standard sieve near the edge. The positioning holes are adapted to be inserted into the positioning posts on the upper surface of the sieve fixing base.

[0006] As a preferred technical solution of this utility model, the vibrating screen cylinder has multiple large springs, which are symmetrically distributed at the four corners of the vibrating screen cylinder. The funnel has two small springs, which are symmetrically distributed on both sides of the funnel. The upper end of the funnel small spring is welded to the outer wall of the funnel, and the lower end is bolted to the support beam in the middle of the frame. The inner wall of the funnel is covered with a rubber anti-sticking layer.

[0007] As a preferred embodiment of this utility model, the bottom end of the inclined bottom plate inside the mixing pot is aligned with the discharge port of the mixing pot, and a polytetrafluoroethylene anti-stick layer is pasted on the upper surface of the inclined lower plate, the inclination angle of which is consistent with the inclination angle of the inclined bottom plate inside the mixing pot.

[0008] Compared with the prior art, the beneficial effects of this utility model are: 1. By adopting a dual drive of DC motor and electromagnetic vibration, and with the vibrating screen cylinder vibrating stably through a large spring, and the standard screen being fixed by a fixed base frame and magnetic fixing blocks, the aggregate and mortar in the concrete mixture are fully separated and evenly mixed. The mixing scraper plate rotates against the inner wall of the mixing pot to prevent mortar from sticking to the wall, solving the problems of incomplete screening and uneven mixing in traditional equipment. The mortar screening rate is increased, and the mixing uniformity is greatly improved, ensuring the accuracy of concrete mixture performance test data and reducing test errors caused by screening and mixing problems. By adopting a dual-flushing structure with external nozzles and internal flow channels, the nozzles cover the outside of the vibrating screen cylinder and the mixing pot, while the flow channels of the hollow mixing rods and the auxiliary flushing holes of the mixing blades extend deep into the equipment. Combined with the inclined lower plate and the inclined bottom plate inside the mixing pot, residue is reduced. The PLC controller integrates vibration frequency adjustment, mixing speed setting, and flushing time control functions. One-button start and stop are achieved through the touch screen and buttons, eliminating the need for individual manual operation of each component. Parameters can be flexibly adjusted according to the type of concrete, solving the problems of incomplete flushing and cumbersome operation of traditional equipment, reducing the difficulty of manual cleaning and operation, and adapting to the testing needs of different types of concrete mixtures. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a front perspective view of the present invention; Figure 2 This is a top perspective view of the present invention; Figure 3 This is a schematic diagram showing the cross-sectional structure of the present utility model; Figure 4 This is a schematic diagram showing the structure of the vibrating screen cylinder, magnetic fixing hole, screen fixing base frame, funnel spring, inner groove, electromagnet, coil, electromagnetic block, electromagnetic block outer spring, swing rod, fixing rod, DC motor and controller of this utility model. Figure 5 This diagram illustrates the structure of the inclined bottom plate, hollow stirring rod, external gear, internal gear, DC motor, and sealing gasket of the mixing pot of this utility model. Figure 6 This is a schematic diagram showing the internal structure of this utility model.

[0011] In the diagram: 1. Frame; 2. Vibrating screen cylinder; 3. Funnel; 4. Mixing pot; 5. Standard sieve; 6. Magnetic fixing hole; 7. Fixed base frame; 8. Magnetic fixing block; 9. Large spring of vibrating screen cylinder; 10. Small spring of funnel; 11. Inner groove; 12. Electromagnet; 13. Coil; 14. Electromagnetic block; 15. Spring surrounding the electromagnetic block; 16. Swing rod; 17. Fixed rod; 18. DC motor one; 19. Controller; 20. Inclined bottom plate inside the mixing pot; 21. Hollow stirring rod; 22. External gear; 23. Internal gear; 24. DC motor two; 25. Sealing gasket; 26. Stirring scraper arc plate; 27. Stirring blade; 28. Inclined lower plate; 29. ​​Collection box; 30. Sieve; 31. Pneumatic telescopic rod; 32. Connecting pipe; 33. High-pressure water pump; 34. Water outlet pipe; 35. Nozzle; 36. Water inlet pipe; 37. Control valve. Detailed Implementation

[0012] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0013] Please see Figure 1-6This utility model provides a mortar screening device for concrete mixtures, including a frame 1. A vibrating screen cylinder 2 is elastically connected to the upper part of the frame 1 via a large spring 9. A standard screen 5 is horizontally arranged inside the vibrating screen cylinder 2. The bottom of the standard screen 5 is supported by a fixed base frame 7. The two sides of the fixed base frame 7 are in contact with the inner wall of the vibrating screen cylinder 2, and the fixed base frame 7 is magnetically fixed to the vibrating screen cylinder 2 by magnetic fixing blocks 8 and magnetic fixing holes 6 opened on the side wall of the vibrating screen cylinder 2. A DC motor 18 is installed on one side of the frame 1. The output shaft of the DC motor 18 is hinged to one end of a swing rod 16, and the other end of the swing rod 16 is hinged to the middle of a fixed rod 17. The fixed rod 17 is welded to the side of the vibrating screen cylinder 2. The vibrating screen cylinder 2 has an inner groove 11 at the lower part of its inner wall. An electromagnet 12 is fixed inside the inner groove 11, and a coil 13 is wound around the outside of the electromagnet 12. An electromagnetic block 14 is slidably arranged inside the inner groove 11. An electromagnetic block outer spring 15 is sleeved on the outside of the electromagnetic block 14. The two ends of the electromagnetic block outer spring 15 abut against one side of the electromagnetic block 14 and the inner groove 11, respectively. The electromagnetic block 14 is in contact with the bottom of the outer wall of the vibrating screen cylinder 2. A funnel 3 is connected to the bottom of the vibrating screen cylinder 2. Small funnel springs 10 are distributed on the side of the outer wall of the funnel 3. The bottom of the funnel 3 is connected to a mixing pot 4. The mixing pot 4 is fixed in the middle of the frame 1. An inclined bottom plate 20 is set at the bottom of the mixing pot 4. The bottom center of the mixing pot 4 is vertically... A hollow stirring rod 21 runs straight through the mixing vessel 4. A stirring blade 27 and a scraping arc plate 26 are welded to the outer wall of the hollow stirring rod 21. The scraping arc plate 26 fits snugly against the inner wall of the mixing vessel 4. A second DC motor 24 is installed at the bottom of the mixing vessel 4. An external gear 22 is fitted onto the output shaft of the second DC motor 24. The external gear 22 meshes with an internal gear 23. The internal gear 23 is keyed to the inner wall of the hollow stirring rod 21. A sealing gasket 25 is installed between the hollow stirring rod 21 and the bottom of the mixing vessel 4. A pneumatic telescopic rod 31 is installed on the lower rear side of the mixing vessel 4. The output end of the pneumatic telescopic rod 31 is hinged to the rear of the receiving box 29. An inclined lower plate 28 is installed on the lower front side of the mixing vessel 4. One end of the inclined lower plate 28 is connected to the mixing vessel. 4. The discharge port extends to the receiving box 29 at the bottom of the frame 1. A sieve 30 is installed on the inclined lower plate 28. A high-pressure water pump 33 is installed on the other side of the frame 1. The water inlet of the high-pressure water pump 33 is connected to the water inlet pipe 36. The water outlet of the high-pressure water pump 33 is connected to the connecting pipe 32. The connecting pipe 32 branches into the water outlet pipe 34. The end of the water outlet pipe 34 is equipped with a nozzle 35. The nozzle 35 is aimed at the inside of the vibrating screen cylinder 2 and the inside of the mixing pot 4 respectively. A control valve 37 is installed on the water outlet pipe 34. A controller 19 is also fixed on one side of the frame 1. The controller 19 is electrically connected to DC motor 18, DC motor 24, electromagnet 12, pneumatic telescopic rod 31 and high-pressure water pump 33 respectively. Specifically: The DC motor 18 is started by the controller 19, and its output shaft drives the swing arm 16 to swing. The swing arm 16 drives the fixed rod 17 to drive the vibrating screen cylinder 2 to vibrate up and down along the large spring 9 of the vibrating screen cylinder. At the same time, the controller 19 controls the coil 13 to switch on and off, so that the electromagnet 12 periodically attracts and releases the electromagnetic block 14. The electromagnetic block 14 moves up and down reciprocally under the action of the outer spring 15, further applying high-frequency vibration to the vibrating screen cylinder 2. After the concrete mixture is put into the vibrating screen cylinder 2, the standard sieve 5 separates the mortar under the action of dual vibration. The aggregate is retained on the standard sieve 5, and the mortar falls into the funnel 3 through the standard sieve 5. The small spring 10 of the funnel can buffer the vibration transmitted by the vibrating screen cylinder 2 to the funnel 3 to avoid mortar blockage. The mortar enters the mixing pot 4 through the funnel 3. The controller 19 starts the DC motor 24, whose output shaft drives the external gear 22 to rotate. The external gear 22 meshes with the internal gear 23, which in turn drives the hollow stirring rod 21 to rotate. The stirring blades 27 on the hollow stirring rod 21 mix the mortar. The stirring scraper arc plate 26 rotates against the inner wall of the mixing pot 4 to scrape off the mortar adhering to the pot wall, ensuring uniform mixing. After the test, the controller 19 starts the high-pressure water pump 33. The high-pressure water is diverted to the outlet pipe 34 through the inlet pipe 36 and the connecting pipe 32. The nozzles 35 wash the standard sieve and inner wall inside the vibrating screen cylinder 2 and the stirring blades, scraper arc plate, and inner wall inside the mixing pot 4. After washing, the mortar and wastewater flow to the discharge port through the inclined bottom plate 20 in the mixing pot. After being filtered along the sieve 30 of the inclined lower plate 28, it finally flows into the collection box 29. Throughout the process, the controller 19 coordinates the start and stop of each component and the parameters. This enables efficient screening, uniform mixing, thorough rinsing, and automated control of concrete mixtures and mortar, solving the core problems of incomplete screening, uneven mixing, inadequate rinsing, and low automation in existing equipment.

[0014] The standard sieve 5 is made of stainless steel, and multiple positioning holes are evenly opened on the upper surface of the standard sieve 5 near the edge. The positioning holes are adapted to be inserted into the positioning posts on the upper surface of the sieve fixing base 7. Specifically: The standard sieve 5 is made of stainless steel, which has the characteristics of rust resistance and high strength. It can withstand the impact and vibration of concrete mixture for a long time. During installation, the positioning hole of the standard sieve 5 is inserted into the positioning column of the sieve fixing base 7 to achieve initial positioning. Then, the magnetic fixing block 8 is magnetically attracted to the magnetic fixing hole 6 of the vibrating screen cylinder 2 to prevent the standard sieve 5 from shifting during high-frequency vibration.

[0015] The stirring hollow rod 21 has a hollow structure. The upper end of the stirring hollow rod 21 is connected to a branch pipe of the connecting pipe 32 through a rotary joint. The stirring blade 27 has a flow channel inside that communicates with the inner cavity of the stirring hollow rod 21. The lower surface of the stirring blade 27 has an auxiliary flushing hole that communicates with the flow channel. Specifically: During the post-test rinsing, a portion of the high-pressure water delivered by the high-pressure water pump 33 enters the hollow stirring rod 21 through the connecting pipe 32. Dynamic sealing is achieved through the rotary joint to prevent water leakage. The high-pressure water flows into the flow channel of the stirring blade 27 along the inner cavity of the hollow stirring rod 21 and is finally sprayed out from the auxiliary rinsing hole on the lower surface of the stirring blade 27. This rinsing method, together with the nozzle 35 aligned with the inside of the stirring pot 4, forms an "internal and external attack". The auxiliary rinsing hole can directly rinse the bottom of the stirring pot 4, the inner side of the stirring blade 27 and other dead corners that are difficult to be covered by the nozzle 35.

[0016] Multiple large springs 9 are provided in the vibrating screen cylinder 2, which are symmetrically distributed at the four corners of the vibrating screen cylinder 2. Two small springs 10 are provided in the funnel 3, which are symmetrically distributed on both sides of the funnel 3. The upper end of the small spring 10 is welded to the outer wall of the funnel 3, and the lower end is bolted to the support beam in the middle of the frame 1. The inner wall of the funnel 3 is covered with a rubber anti-stick layer. Specifically: The large springs 9 of the vibrating screen cylinder are symmetrically distributed at the four corners of the bottom of the vibrating screen cylinder 2. On the one hand, they provide elastic support for the vibrating screen cylinder 2, and on the other hand, they buffer the impact force during vibration, ensuring that the vibrating screen cylinder 2 vibrates stably only in the vertical direction, avoiding uneven screening caused by lateral deviation. The small spring 10 of the funnel is symmetrically connected to the funnel 3 and the frame 1. It can absorb the vibration transmitted by the vibrating screen cylinder 2 and prevent the funnel 3 from cracking due to long-term vibration. The rubber anti-stick layer on the inner wall of the funnel 3 can reduce the adhesion between the mortar and the funnel wall and prevent the mortar from accumulating in the funnel 3 and blocking the material discharge channel.

[0017] The electromagnetic block 14 is made of ferromagnetic material and has an arc-shaped structure at the top. An arc-shaped steel plate is welded to the bottom of the vibrating screen cylinder 2 at the position corresponding to the electromagnetic block 14. The arc-shaped steel plate is in contact with the arc-shaped structure at the top of the electromagnetic block 14. Specifically: When coil 13 is energized, electromagnet 12 generates magnetism to attract electromagnetic block 14, and the outer spring 15 of electromagnetic block is compressed; when coil 13 is de-energized, the magnetism of electromagnet 12 disappears, and electromagnetic block 14 pushes upward against the arc-shaped steel plate at the bottom of vibrating screen cylinder 2 under the elastic force of outer spring 15; the arc-shaped steel plate is adapted to the arc-shaped structure of electromagnetic block 14, which can increase the contact area and avoid wear caused by excessive local force; this electromagnetic drive and the swing arm drive of DC motor 18 form a dual vibration source of "mechanical + electromagnetic", which makes vibrating screen cylinder 2 generate high-frequency composite vibration.

[0018] The bottom of the inclined bottom plate 20 inside the mixing pot is aligned with the discharge port of the mixing pot 4. The upper surface of the inclined lower plate 28 is covered with a polytetrafluoroethylene anti-stick layer, and its inclination angle is consistent with the inclination angle of the inclined bottom plate 20 inside the mixing pot. Specifically: The inclined bottom plate 20 inside the mixing pot is inclined, and its bottom end is aligned with the discharge port of the mixing pot 4. After the mortar is mixed or washed, the material can flow quickly to the discharge port along the inclined bottom plate under the action of gravity; the inclined angle of the inclined bottom plate 28 is the same as that of the inclined bottom plate 20 inside the mixing pot, ensuring that the material is smoothly transported to the receiving box 29; the polytetrafluoroethylene anti-stick layer on the surface of both has extremely low surface adhesion, which can prevent mortar or concrete residue from adhering.

[0019] Controller 19 is a PLC controller, and its surface is equipped with a touch screen and control buttons; Specifically: The controller 19 adopts a PLC and has a built-in vibration frequency adjustment module, stirring speed adjustment module and rinsing time setting module; the operator can input parameters through the surface touch screen or directly press the preset control button, and the controller 19 can send electrical signals to DC motor 18, DC motor 24, electromagnet 12, pneumatic telescopic rod 31 and high-pressure water pump 33 to control each component to operate according to the set parameters; at the same time, the touch screen can display the working status of each component in real time, which is convenient for the operator to monitor.

[0020] In this invention, the DC motor 18 is started by the controller 19, and its output shaft drives the swing arm 16 to swing. The swing arm 16 drives the fixed rod 17 to drive the vibrating screen cylinder 2 to vibrate up and down along the large spring 9 of the vibrating screen cylinder. At the same time, the controller 19 controls the coil 13 to switch on and off, so that the electromagnet 12 periodically attracts and releases the electromagnetic block 14. The electromagnetic block 14 moves up and down reciprocally under the action of the spring 15 surrounding the electromagnetic block, further applying high-frequency vibration to the vibrating screen cylinder 2. After the concrete mixture is put into the vibrating screen cylinder 2, the standard sieve 5 separates the mortar under the action of dual vibration. The aggregate is retained on the standard sieve 5, and the mortar falls into the funnel 3 through the standard sieve 5. The small spring 10 of the funnel can buffer the vibration transmitted by the vibrating screen cylinder 2 to the funnel 3 to avoid mortar blockage. The mortar enters the mixing pot 4 through the funnel 3. The controller 19 starts the DC motor 24, whose output shaft drives the external gear 22 to rotate. The external gear 22 meshes with the internal gear 23, which in turn drives the hollow stirring rod 21 to rotate. The stirring blades 27 on the hollow stirring rod 21 mix the mortar. The stirring scraper arc plate 26 rotates against the inner wall of the mixing pot 4 to scrape off the mortar adhering to the pot wall, ensuring uniform mixing. After the test, the controller 19 starts the high-pressure water pump 33. The high-pressure water is diverted to the outlet pipe 34 through the inlet pipe 36 and the connecting pipe 32. The nozzles 35 wash the standard sieve and inner wall inside the vibrating screen cylinder 2 and the stirring blades, scraper arc plate, and inner wall inside the mixing pot 4. After washing, the mortar and wastewater flow to the discharge port through the inclined bottom plate 20 in the mixing pot. After being filtered along the sieve 30 of the inclined lower plate 28, it finally flows into the collection box 29. Throughout the process, the controller 19 coordinates the start and stop of each component and the parameters. This enables efficient screening, uniform mixing, thorough rinsing, and automated control of concrete mixtures and mortar, solving the core problems of incomplete screening, uneven mixing, inadequate rinsing, and low automation in existing equipment.

[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mortar screening device for concrete mixtures, comprising a frame (1), characterized in that: The upper part of the frame (1) is elastically connected to the vibrating screen cylinder (2) by a large spring (9). A standard screen (5) is horizontally arranged inside the vibrating screen cylinder (2). The bottom of the standard screen (5) is supported by a fixed base frame (7). The two sides of the fixed base frame (7) are in contact with the inner wall of the vibrating screen cylinder (2). The fixed base frame (7) is magnetically fixed to the magnetic fixing hole (6) opened on the side wall of the vibrating screen cylinder (2) by a magnetic fixing block (8). A DC motor (18) is installed on one side of the frame (1). The output shaft of the DC motor (18) is hinged to one end of a swing rod (16). The other end of the swing rod (16) is hinged to the middle of a fixed rod (17). The fixed rod (17) is welded to the side of the vibrating screen cylinder (2). The lower part of the inner wall of the vibrating screen cylinder (2) An inner groove (11) is provided, and an electromagnet (12) is fixed inside the inner groove (11). A coil (13) is wound around the outside of the electromagnet (12). An electromagnetic block (14) is slidably arranged inside the inner groove (11). An electromagnetic block outer spring (15) is sleeved on the outside of the electromagnetic block (14). The two ends of the electromagnetic block outer spring (15) respectively abut against one side of the electromagnetic block (14) and the inner groove (11). The electromagnetic block (14) is in contact with the bottom of the outer wall of the vibrating screen cylinder (2). A funnel (3) is connected below the vibrating screen cylinder (2). Small funnel springs (10) are distributed on the side of the outer wall of the funnel (3). The bottom of the funnel (3) is connected to the mixing pot (4). The mixing pot (4) is fixed in the middle of the frame (1). The bottom of the mixing pot (4) is connected to the mixing pot. An inclined bottom plate (20) is set inside the mixing pot. A hollow stirring rod (21) is vertically inserted through the center of the bottom of the mixing pot (4). A stirring blade (27) and a stirring scraper arc plate (26) are welded to the outer wall of the hollow stirring rod (21). The stirring scraper arc plate (26) is in contact with the inner wall of the mixing pot (4). A DC motor (24) is set at the bottom of the mixing pot (4). An external gear (22) is sleeved on the output shaft of the DC motor (24). The external gear (22) meshes with an internal gear (23). The internal gear (23) is keyed to the inner wall of the hollow stirring rod (21). A sealing gasket (25) is set between the hollow stirring rod (21) and the bottom of the mixing pot (4). A pneumatic telescopic rod (31) is installed on the rear side of the lower part of the mixing pot (4). The output end of the telescopic rod (31) is hinged to the rear of the receiving box (29). An inclined lower plate (28) is provided on the lower front side of the mixing pot (4). One end of the inclined lower plate (28) is connected to the discharge port of the mixing pot (4), and the other end extends to the receiving box (29) at the bottom of the frame (1). A sieve (30) is provided on the inclined lower plate (28). A high-pressure water pump (33) is installed on the other side of the frame (1). The water inlet end of the high-pressure water pump (33) is connected to the water inlet pipe (36), and the water outlet end of the high-pressure water pump (33) is connected to the connecting pipe (32). The connecting pipe (32) branches into the water outlet pipe (34). A nozzle (35) is installed at the end of the water outlet pipe (34). The nozzle (35) is respectively aimed at the inside of the vibrating screen cylinder (2) and the inside of the mixing pot (4).A control valve (37) is installed on the water outlet pipe (34), and a controller (19) is fixed on one side of the frame (1). The controller (19) is electrically connected to DC motor one (18), DC motor two (24), electromagnet (12), pneumatic telescopic rod (31), and high-pressure water pump (33).

2. The mortar screening equipment for concrete mixtures according to claim 1, characterized in that: The standard sieve (5) is made of stainless steel, and multiple positioning holes are evenly opened on the upper surface of the standard sieve (5) near the edge. The positioning holes are adapted to be inserted into the positioning posts on the upper surface of the sieve fixing base (7).

3. The mortar screening equipment for concrete mixtures according to claim 1, characterized in that: The stirring hollow rod (21) has a hollow structure. The upper end of the stirring hollow rod (21) is connected to a branch pipe of the connecting pipe (32) through a rotary joint. The stirring blade (27) has a flow channel inside that communicates with the inner cavity of the stirring hollow rod (21). The lower surface of the stirring blade (27) has an auxiliary flushing hole that communicates with the flow channel.

4. The mortar screening equipment for concrete mixtures according to claim 1, characterized in that: Multiple large springs (9) are provided in the vibrating screen cylinder, which are symmetrically distributed at the four corners of the vibrating screen cylinder (2). Two small springs (10) are provided in the funnel, which are symmetrically distributed on both sides of the funnel (3). The upper end of the small spring (10) is welded to the outer wall of the funnel (3), and the lower end is bolted to the support beam in the middle of the frame (1). The inner wall of the funnel (3) is covered with a rubber anti-sticking layer.

5. The mortar screening equipment for concrete mixtures according to claim 1, characterized in that: The electromagnetic block (14) is made of ferromagnetic material and has an arc-shaped structure at the top. An arc-shaped steel plate is welded to the bottom of the vibrating screen cylinder (2) at the position corresponding to the electromagnetic block (14). The arc-shaped steel plate is adapted to contact the arc-shaped structure at the top of the electromagnetic block (14).

6. The mortar screening equipment for concrete mixtures according to claim 1, characterized in that: The bottom end of the inclined bottom plate (20) inside the mixing pot is aligned with the discharge port of the mixing pot (4). The upper surface of the inclined lower plate (28) is covered with a polytetrafluoroethylene anti-stick layer, and its inclination angle is consistent with the inclination angle of the inclined bottom plate (20) inside the mixing pot.

7. The mortar screening equipment for concrete mixtures according to claim 1, characterized in that: The controller (19) is a PLC controller, and the surface of the controller (19) is provided with a touch screen and control buttons.

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