Screening machine for dry-mixed mortar production

Abstract

The invention discloses a screening machine for dry-mixed mortar production, and belongs to the technical field of dry-mixed mortar production equipment. The screening box is arranged in the shell, raw materials can be screened through the net-shaped design of the bottom of the screening box, the shell is connected with a supporting device for supporting the screening box, the top of the screening box communicates with a sleeve, and the axis of the sleeve is obliquely arranged and perpendicular to the screening box. The feeding pipe is bent into multiple sections, one end of the feeding pipe is rotationally connected with the sleeve, the other end of the feeding pipe penetrates through the shell and extends to the outside, and the feeding pipe communicates with the interior of the screening box; the driving device comprises a motor and a synchronous assembly, the motor is connected with the shell, one end of the synchronous assembly is connected with the motor, the other end of the synchronous assembly is connected with the feeding pipe and can drive the feeding pipe to rotate, and the section, connected with the synchronous assembly, of the feeding pipe is vertically arranged; and the collecting box is arranged at the bottom of the shell and used for collecting materials leaked out of the screening box, and the effect of improving the screening efficiency is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of dry-mix mortar production equipment, and in particular to a screening machine for dry-mix mortar production. Background Art

[0002] Dry-mixed mortar is widely used in modern construction projects, and one of the key links in its production process is screening. The production process of traditional dry-mixed mortar usually includes steps such as preliminary processing, mixing and packaging of raw materials, among which the screening process is crucial to ensure product quality. However, in practical applications, traditional screening equipment often has certain limitations and is difficult to meet the requirements of high efficiency and high quality.

[0003] At present, the common dry-mixed mortar screening machines on the market mainly adopt a fixed screen structure, that is, the screen is fixedly connected to the inner wall of the screening machine. Although this design is simple and easy to implement, in actual operation, due to the fixed position of the screen, materials are easily accumulated on its surface, forming a blockage phenomenon, thereby reducing the screening efficiency. To this end, we propose a screening machine for dry-mixed mortar production. Summary of the invention

[0004] In order to improve the screening efficiency, the present invention provides a screening machine for dry-mix mortar production.

[0005] The present invention provides a screening machine for dry-mix mortar production, which adopts the following technical solution: A screening machine for dry-mix mortar production comprises a shell; A screening box is arranged in the shell, the mesh design of the bottom of the screening box can screen the raw materials, the shell is connected to a supporting device for supporting the screening box, the top of the screening box is connected to a sleeve, and the axis of the sleeve is inclined and perpendicular to the screening box; A feeding pipe is bent and provided with multiple sections, one end of which is rotatably connected to the sleeve, and the other end of which passes through the shell and extends to the outside, and the feeding pipe is communicated with the inside of the screening box; A driving device, comprising a motor and a synchronous assembly, wherein the motor is connected to the housing, one end of the synchronous assembly is connected to the motor, and the other end of the synchronous assembly is connected to the feeding tube, and can drive the feeding tube to rotate, and a section of the feeding tube connected to the synchronous assembly is vertically arranged; and A collecting box is arranged at the bottom of the shell body and is used for collecting materials leaking from the screening box.

[0006] By adopting the above technical solution, the feeding pipe allows the material to enter the screening box smoothly. The mesh design at the bottom of the screening box can effectively screen the dry-mixed mortar raw materials evenly, ensuring that fine particles pass smoothly, while large particles are blocked in the screening box. The motor and the synchronous assembly in the drive device work together to rotate the feeding pipe. Since the axis of the sleeve is tilted and perpendicular to the screening box, the screening box shakes under the drive of the feeding pipe, so that the material can be efficiently screened and the screening efficiency is improved. Among them, the support device is used to provide support for the screening box. The design of the feeding pipe extending to the outside is convenient for external feeding operations. The collection box is arranged at the bottom of the shell, which is used to collect qualified materials leaked from the screening box in time.

[0007] Preferably, the support device comprises a first support assembly and a second support assembly, the first support assembly and the second support assembly are respectively arranged on both sides of the screening box, the first support assembly and the second support assembly have the same structure, and both comprise a lead screw, a slider, a limit column, a movable plate, a support rod, a clamping rod and a limit bolt; The lead screw is rotatably connected to the inner wall of the shell, the thread direction of the lead screw of the first supporting assembly is opposite to the thread direction of the lead screw of the second supporting assembly, the slider is sleeved on the lead screw and slidably connected to the shell, the limit columns are fixedly connected to both sides of the slider, the movable plate is C-shaped and half surrounds the slider, the movable plate is provided with sliding grooves corresponding to the two limit columns, the limit columns are arranged in the corresponding sliding grooves, the limit columns are slidably connected to the movable plate, one end of the support rod is hinged to the movable plate, and the other end is connected to the clamping rod; The clamping rod is provided with a groove, the limiting bolt passes through the clamping rod and extends into the groove, the screening box is sleeved with a fixing plate, the fixing plate extends into the groove, the limiting bolt abuts against the fixing plate, and the screening box and the clamping rod can be fixed.

[0008] By adopting the above technical solution, the screening machine for dry-mixed mortar production can effectively improve the screening efficiency and stability during use. Specifically, the first support assembly and the second support assembly are respectively arranged on both sides of the screening box, with the same structure and opposite thread directions of the lead screw, so as to maintain the balance of the screening box during adjustment. During the use of the screening box, the support rod is hinged to the movable plate, and the limit column can move in the slide groove of the movable plate. The three cooperate with each other to realize the stable movement of the slider along the lead screw. The support rod and the clamping rod are connected to the fixed plate by the limit bolts to realize the effective fixation and support of the screening box, thereby improving the stability and safety of the equipment. The reverse thread design of the lead screw ensures that the two sliders move toward each other when rotating, thereby adjusting the position of the clamping rod to achieve stable support for the screening box.

[0009] Preferably, the inner wall of the shell is connected with a screen, and the screen is arranged below the screening box for secondary screening of raw materials.

[0010] By adopting the above technical solution, the screen is set under the screening box, which can further screen the raw materials during the screening process and improve the purity and quality of the final product. At the same time, this design can also effectively prevent larger particles from entering the subsequent process, avoid equipment blockage and damage, and extend the service life of the equipment.

[0011] Preferably, a guide frame is connected to the inner wall of the shell, the guide frame is in contact with the inner wall of the shell, the guide frame is arranged above the screen, and the top of the guide frame is inclined downward from one end close to the shell to the other end.

[0012] By adopting the above technical solution, the inclined design of the top of the guide frame helps the raw materials to flow smoothly into the screen, further improving the continuity and stability of the screening process and ensuring the quality and efficiency of dry-mixed mortar production.

[0013] Preferably, a movable frame is fixedly connected to the periphery of the screen, the movable frame is slidably connected to the bottom of the guide frame, and the screen is connected to a control device for controlling the screen to reciprocate in the horizontal direction.

[0014] By adopting the above technical solution, specifically, the control device can control the movement of the moving frame, and the design of sliding connection between the moving frame and the bottom of the guide frame enables the screen to move smoothly under the guidance of the guide frame, and the horizontal reciprocating motion of the screen effectively improves the screening efficiency and screening accuracy. At the same time, the guide frame cooperates with the moving frame to reduce the possibility that the raw materials on the screen will fall directly into the collection box without being screened.

[0015] Preferably, the control device includes a fixed frame, a gear and a rack, the fixed frame is connected to the inner wall of the shell, and the outer wall of the fixed frame is in contact with the inner wall of the shell, the top of the fixed frame is slidably connected to the bottom of the movable frame, the guide frame, the movable frame and the fixed frame form an enclosed space, the gear and the rack are both arranged in the enclosed space, the gear is sleeved on the screw, the rack is fixedly connected to the movable frame, and the rack is meshed with the gear.

[0016] By adopting the above technical solution, the slider drives the lead screw to rotate, the lead screw drives the gear to rotate, the gear drives the rack to move, and the slider reciprocates on the lead screw, so the moving frame drives the screen to reciprocate, thereby improving the screening efficiency and screening accuracy. Among them, the fixed frame fits tightly with the inner wall of the shell, ensuring the stability and reliability of the entire control device. The meshing transmission method of the gear and the rack is simple and reliable, which can effectively transmit power and make it easy for the screen to achieve accurate and smooth reciprocating motion. The design of the enclosed space not only reduces the risk of external dust and other impurities entering, but also protects the internal transmission components from damage.

[0017] Preferably, the screening box includes a cover body and a screening part, the sleeve is fixedly connected to the cover body, the cover body is fixedly connected to the clamping rod, the screening part is fixedly connected to the fixing plate, and the screening part abuts against the cover body, thereby achieving sealing of the screening box.

[0018] By adopting the above technical solution, the cover of the screening box is fixedly connected to the clamping rod, which ensures the stability and sealing of the screening box and reduces the possibility of leakage of raw materials during the screening process. At the same time, the screening part is fixedly connected to the fixing plate, and the limiting bolt fixes the screening part, which improves the overall stability of the screening box and ensures the smooth progress of the screening process.

[0019] Preferably, the fixing plate is provided with a thread groove, the limiting bolt extends into the thread groove and is threadably connected to the fixing plate.

[0020] By adopting the above technical solution, the fixing plate is provided with a thread groove, and the limit bolt extends into the thread groove and is threadedly connected to the fixing plate. This design allows the limit bolt to be more firmly connected to the fixing plate, thereby improving the stability of the screening box and reducing the possibility of loosening or falling off due to vibration during operation. At the same time, the threaded connection method is easy to install and disassemble, and is convenient for maintenance and adjustment.

[0021] Preferably, a material taking hole is provided on the side wall of the shell, and the material taking hole can take out the material on the screen and the material in the screening part. A switch door connected to the shell is provided in the material taking hole, and sealing gaskets are connected on all sides of the switch door. When the switch door covers the material taking hole, the sealing gasket abuts against the shell.

[0022] By adopting the above technical solution, the sealing performance of the equipment can be ensured while the operator can quickly and safely remove the materials on the screen and the materials in the screening part, thereby improving work efficiency. The sealing gasket connected around the switch door is in contact with the shell to ensure the sealing performance during the material removal process.

[0023] Preferably, the bottom of the screening box is arranged in a hemispherical surface.

[0024] By adopting the above technical solution, the hemispherical surface setting at the bottom of the screening box can effectively reduce the residue of materials during the screening process and improve the screening efficiency and cleanliness.

[0025] In summary, the present invention has the following beneficial effects: 1. The feeding pipe allows the material to enter the screening box smoothly. The mesh design at the bottom of the screening box can effectively screen the dry-mixed mortar raw materials evenly, ensuring that fine particles pass smoothly, while large particles are blocked in the screening box. The motor and synchronization components in the drive device work together to rotate the feeding pipe. Since the axis of the sleeve is tilted and perpendicular to the screening box, the screening box shakes under the drive of the feeding pipe, so that the material can be efficiently screened and the screening efficiency is improved. Among them, the support device is used to provide support for the screening box. The design of the feeding pipe extending to the outside is convenient for external feeding operations. The collection box is arranged at the bottom of the shell to promptly collect qualified materials leaked from the screening box.

[0026] 2. A screen is provided for secondary screening of raw materials. At the same time, the screen is controlled to reciprocate in the horizontal direction through the control component, thereby improving the screening efficiency and screening accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic diagram of the overall structure of a screening machine for producing dry-mix mortar.

[0028] Figure 2 It is a schematic diagram of the interior of the shell.

[0029] Figure 3 It is a structural diagram of the feeding pipe and the screening box.

[0030] Figure 4 It is a structural schematic diagram of the first supporting assembly.

[0031] Figure 5 It is a structural diagram of the control device.

[0032] Description of reference numerals: 1. Shell; 11. Collecting box; 12. Material taking hole; 13. Opening and closing door; 2. Screening box; 21. Cover body; 22. Screening part; 23. Sleeve; 24. Fixed plate; 3. Feeding pipe; 4. Driving device; 41. Motor; 42. Synchronous component; 421. First pulley; 422. Second pulley; 423. Synchronous belt; 5. Support device; 51. First support assembly; 511. Lead screw; 512. Sliding block; 513. Limiting column; 514. Movable plate; 5141. Slide; 515. Support rod; 516. Clamping rod; 5161. Groove; 517. Limiting bolt; 52. Second support assembly; 6. Screen; 61. Moving frame; 7. Guide frame; 8. Control device; 81. Fixed frame; 82. Gear; 83. Rack. DETAILED DESCRIPTION

[0033] In order to enable technicians in this field to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0034] In the description of the embodiments of the present application, words such as "for example" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "for example" or "for example" is intended to present related concepts in a specific way.

[0035] In the description of the embodiments of the present application, the meaning of the term "multiple" refers to two or more. For example, multiple systems refer to two or more systems, and multiple screen terminals refer to two or more screen terminals. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0036] A screening machine for dry-mix mortar production, referring to Figure 1 and Figure 2 , including a shell 1, a screening box 2, a feeding pipe 3, a driving device 4 and a collecting box 11. The screening box 2 is arranged in the shell 1, and the bottom of the screening box 2 is designed in a mesh shape, which can screen the raw materials. The shell 1 is connected to a supporting device 5 for supporting the screening box 2. The top of the screening box 2 is connected to a sleeve 23, and the axis of the sleeve 23 is inclined and perpendicular to the screening box 2. The feeding pipe 3 is bent and arranged in multiple sections, one end of the feeding pipe 3 is rotatably connected to the sleeve 23, and the other end passes through the shell 1 to the outside, and the feeding pipe 3 is connected to the inside of the screening box 2. The driving device 4 includes a motor 41 and a synchronous component 42, the motor 41 is connected to the shell 1, one end of the synchronous component 42 is connected to the motor 41, and the other end is connected to the feeding pipe 3, which can drive the feeding pipe 3 to rotate. The section where the feeding pipe 3 is connected to the synchronous component 42 is vertically arranged. The collecting box 11 is arranged at the bottom of the shell 1 to collect the material leaked from the screening box 2.

[0037] The feeding pipe 3 allows the material to smoothly enter the screening box 2. The mesh design at the bottom of the screening box 2 can effectively screen the dry-mixed mortar raw materials evenly, ensuring that fine particles pass smoothly, while large particles are blocked in the screening box 2. The motor 41 and the synchronization component 42 in the driving device 4 work together to rotate the feeding pipe 3. Since the axis of the sleeve 23 is tilted and perpendicular to the screening box 2, the screening box 2 shakes under the drive of the feeding pipe 3, so that the material is efficiently screened and the screening efficiency is improved.

[0038] Reference Figure 3 The screening box 2 includes a cover 21 and a screening part 22. The cover 21 is a plate-like body with a rectangular cross section, which is used to cover the screening part 22. The screening part 22 is open at the top, and its side walls and bottom are mesh-shaped, and the bottom of the screening part 22 is hemispherical, which effectively reduces the residue of materials during the screening process and improves the screening efficiency and cleanliness.

[0039] Reference Figure 1 The shell 1 is in the shape of a rectangular parallelepiped, and a support leg is fixedly connected to the bottom for support. A material taking hole 12 and a collecting trough are provided on the side wall of the shell 1, and the material taking hole 12 connects the outside with the inside of the shell 1. A switch door 13 is provided in the material taking hole 12, and the switch door 13 is hinged to the shell 1. Sealing pads are fixedly connected to the switch door 13 on all sides, and when the switch door 13 covers the material taking hole 12, the sealing pads abut against the shell 1. A handle is fixedly connected to the switch door 13.

[0040] The design of the opening and closing door 13 can ensure the sealing of the equipment while facilitating the operator to quickly and safely remove the materials on the screen 6 and the materials in the screening part 22, thereby improving work efficiency.

[0041] Reference Figure 1 The collecting tank is connected to the inside of the housing 1, and the collecting tank matches the collecting box 11. The collecting box 11 is inserted into the collecting tank, and the collecting box 11 is a box body with an opening at the top. A handle is fixedly connected to the side wall of the collecting box 11 located outside.

[0042] Reference Figure 1 The motor 41 is fixedly connected to the outer wall of the housing 1 through a mounting plate. The synchronous assembly 42 includes a first pulley 421, a second pulley 422 and a synchronous belt 423. The first pulley 421 is fixedly connected to the motor 41, the second pulley 422 is sleeved on the feeding tube 3, and the synchronous belt 423 is sleeved on the first pulley 421 and the second pulley 422, and abuts against the first pulley 421 and the second pulley 422, so that the motor 41 drives the feeding tube 3 to rotate.

[0043] Reference Figure 1 and Figure 2The support device 5 is arranged inside the housing 1, and includes a first support assembly 51 and a second support assembly 52. ​​The first support assembly 51 and the second support assembly 52 are respectively arranged on both sides of the screening box 2 and are both connected to the screening box 2. The first support assembly 51 and the second support assembly 52 are respectively close to the two side walls of the housing 1 and the adjacent switch door 13.

[0044] The first supporting assembly 51 and the second supporting assembly 52 are respectively disposed on both sides of the screening box 2, and can maintain the balance of the screening box 2 during adjustment.

[0045] Reference Figure 3 and Figure 4 The first support assembly 51 and the second support assembly 52 have the same structure, and both include a lead screw 511, a slider 512, a limiting column 513, a movable plate 514, a support rod 515, a clamping rod 516 and a limiting bolt 517. The thread direction of the lead screw 511 of the first support assembly 51 is opposite to the thread direction of the lead screw 511 of the second support assembly 52.

[0046] Reference Figure 2 and Figure 4 , the lead screw 511 is vertically arranged, and the top of the lead screw 511 is rotatably connected to the housing 1. The slider 512 is sleeved on the lead screw 511 and is threadedly connected to the lead screw 511, and the slider 512 is slidably abutted against the side wall of the housing 1. Two limit posts 513 are horizontally arranged, respectively arranged on both sides of the slider 512, and the limit posts 513 are fixedly connected to the slider 512. The movable plate 514 is C-shaped and half surrounds the slider 512. Two slide grooves 5141 are provided on the movable plate 514, and the two slide grooves 5141 are respectively located at the two free ends of the movable plate 514, and the two slide grooves 5141 correspond to the two limit posts 513 one by one. The slide groove 5141 is in a long strip shape and matches the limit post 513. The limit post 513 is arranged in the corresponding slide groove 5141 and is slidably connected to the movable plate 514.

[0047] Reference Figure 4 One end of the support rod 515 is hinged to the movable plate 514, and the other end is fixedly connected to the clamping rod 516. The axis of the hinge shaft of the support rod 515 and the axis of the lead screw 511 are located in the same vertical plane.

[0048] Reference Figure 3 and Figure 4 A groove 5161 is formed at the top of the clamping rod 516, and two ends of the groove 5161 pass through the two ends of the clamping rod 516. The cover body 21 is inserted into the groove 5161 and fixedly connected to the clamping rod 516. A fixing plate 24 is sleeved on the top of the screening part 22, and the fixing plate 24 is inserted into the groove 5161. A threaded groove is formed at the bottom of the fixing plate 24, and a limiting bolt 517 passes through the clamping rod 516 and extends into the threaded groove. The limiting bolt 517 is threadedly connected to both the clamping rod 516 and the fixing plate 24.

[0049] During the use of the screening box 2, the support rod 515 is hinged with the movable plate 514, and the limiting column 513 can move in the slide groove 5141 of the movable plate 514. The three cooperate with each other to realize the stable movement of the slider 512 along the lead screw 511. The support rod 515 and the clamping rod 516 are connected to the fixed plate 24 through the limiting bolt 517 to effectively fix and support the screening box 2, thereby improving the stability and safety of the equipment. The reverse thread design of the lead screw 511 ensures that the two sliders 512 move toward each other when rotating, thereby adjusting the position of the clamping rod 516 to achieve stable support for the screening box 2.

[0050] Reference Figure 3 The top surface of the fixing plate 24 is flush with the top surface of the screening part 22, the length of the fixing plate 24 is the same as the length of the cover body 21, and the width of the fixing plate 24 is the same as the width of the cover body 21, which facilitates the limiting bolt 517 to extend to the threaded groove, thereby facilitating the sealing and fixing of the cover body 21 and the screening part 22.

[0051] Reference Figure 2 and Figure 5 A screen 6 is arranged in the housing 1 , and the screen 6 is arranged horizontally below the screening box 2 , and a movable frame 61 is provided on the screen 6 .

[0052] Reference Figure 2 and Figure 5 The inner wall of the shell 1 is fixedly connected with a guide frame 7, and the outer peripheral wall of the guide frame 7 is in contact with the inner peripheral wall of the shell 1. The top of the guide frame 7 is tilted and tilted downward from one end close to the side wall of the shell 1 to the other end. The moving frame 61 is slidably connected to the bottom of the guide frame 7, and a space is left between the outer wall of the moving frame 61 and the inner wall of the shell 1.

[0053] The inclined design at the top of the guide frame 7 helps the raw materials to flow smoothly into the screen 6, further improving the continuity and stability of the screening process and ensuring the quality and efficiency of the dry-mixed mortar production.

[0054] Reference Figure 2 and Figure 5 , the moving frame 61 is connected to the control device 8. The control device 8 includes a fixed frame 81, a gear 82 and a rack 83. The fixed frame 81 is a frame with a rectangular cross section. The outer peripheral wall of the fixed frame 81 is fitted with the inner peripheral wall of the shell 1, and the fixed frame 81 is fixedly connected to the shell 1. The fixed frame 81, the guide frame 7, the moving frame 61 and the shell 1 surround a closed space.

[0055] Reference Figure 5The gear 82 and the rack 83 form a control group, and the control group is provided with two groups, and they correspond to the two lead screws 511 one by one. The control group is arranged in a closed space. The gear 82 is sleeved on the corresponding lead screw 511 and is fixedly connected to the lead screw 511. The rack 83 meshes with the gear 82 and is fixedly connected to the moving frame 61.

[0056] The slider 512 drives the lead screw 511 to rotate, the lead screw 511 drives the gear 82 to rotate, the gear 82 drives the rack 83 to move, and the slider 512 reciprocates on the lead screw 511, so the moving frame 61 drives the screen 6 to reciprocate, thereby improving the screening efficiency and screening accuracy.

[0057] The use principle of the present application is as follows: when in use, the material is fed into the screening box 2 through the cooperation of the feeding pipe 3 and the sleeve 23. The mesh design at the bottom of the screening box 2 can effectively screen the dry-mixed mortar raw materials evenly, ensuring that fine particles pass smoothly, while large particles are blocked in the screening box 2. At the same time, the motor 41 is started, and the motor 41 drives the feeding pipe 3 to rotate through the synchronization component 42, and the feeding pipe 3 drives the screening box 2 to move through the sleeve 23. Since the axis of the sleeve 23 is inclined and perpendicular to the screening box 2, the screening box 2 is shaken under the drive of the feeding pipe 3, so that the material is efficiently screened and the screening efficiency is improved.

[0058] When the screening box 2 is shaking, it drives the clamping rod 516 and the support rod 515 to move. The support rod 515 is hinged to the movable plate 514. At the same time, the limit column 513 can move in the slide groove 5141 of the movable plate 514. The three cooperate with each other to realize the stable movement of the slider 512 along the screw 511, thereby realizing the stability and reliability of the shaking of the screening box 2.

[0059] The raw materials that have been preliminarily screened fall onto the screen 6, and after secondary screening by the screen 6, fall into the collection box 11 for collection. When the screen 6 screens the raw materials for the secondary screening, the slider 512 drives the lead screw 511 to rotate, the lead screw 511 drives the gear 82 to rotate, the gear 82 drives the rack 83 to move, and the slider 512 reciprocates on the lead screw 511, so the moving frame 61 drives the screen 6 to reciprocate, thereby improving the screening efficiency and screening accuracy.

[0060] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A screening machine for dry-mix mortar production, characterized in that: It comprises a housing (1); A screening box (2) is arranged in the housing (1); the bottom of the screening box (2) is designed to be meshed and can screen the raw materials; the housing (1) is connected to a supporting device (5) for supporting the screening box (2); the top of the screening box (2) is connected to a sleeve (23); the axis of the sleeve (23) is arranged obliquely and perpendicular to the screening box (2); A feeding pipe (3) is bent and provided with multiple sections, one end of the feeding pipe (3) is rotatably connected to the sleeve (23), and the other end passes through the shell (1) and extends to the outside, and the feeding pipe (3) is connected to the inside of the screening box (2); A driving device (4), comprising a motor (41) and a synchronous component (42), wherein the motor (41) is connected to the housing (1), one end of the synchronous component (42) is connected to the motor (41) and the other end is connected to the feeding tube (3), and can drive the feeding tube (3) to rotate, and a section of the feeding tube (3) connected to the synchronous component (42) is vertically arranged; and A collecting box (11) is arranged at the bottom of the housing (1) and is used to collect material leaking from the screening box (2).

2. A screening machine for dry-mix mortar production according to claim 1, characterized in that: The supporting device (5) comprises a first supporting assembly (51) and a second supporting assembly (52), wherein the first supporting assembly (51) and the second supporting assembly (52) are respectively arranged on two sides of the screening box (2), and the first supporting assembly (51) and the second supporting assembly (52) have the same structure, and both comprise a lead screw (511), a sliding block (512), a limiting column (513), a movable plate (514), a supporting rod (515), a clamping rod (516) and a limiting bolt (517); The lead screw (511) is rotatably connected to the inner wall of the shell (1); the thread direction of the lead screw (511) of the first supporting assembly (51) is opposite to the thread direction of the lead screw (511) of the second supporting assembly (52); the slider (512) is sleeved on the lead screw (511) and slidably connected to the shell (1); the limiting columns (513) are fixedly connected to both sides of the slider (512); the movable plate (514) is C-shaped and half surrounds the slider (512); the movable plate (514) is provided with sliding grooves (5141) corresponding to the two limiting columns (513); the limiting columns (513) are arranged in the corresponding sliding grooves (5141); the limiting columns (513) are slidably connected to the movable plate (514); one end of the support rod (515) is hinged to the movable plate (514), and the other end is connected to the clamping rod (516); The clamping rod (516) is provided with a groove (5161), the limiting bolt (517) passes through the clamping rod (516) and extends into the groove (5161), the screening box (2) is sleeved with a fixing plate (24), the fixing plate (24) extends into the groove (5161), the limiting bolt (517) abuts against the fixing plate (24), thereby achieving the fixing of the screening box (2) and the clamping rod (516).

3. A screening machine for dry-mix mortar production according to claim 2, characterized in that: The inner wall of the shell (1) is connected to a screen (6), and the screen (6) is arranged below the screening box (2) and is used for secondary screening of raw materials.

4. A screening machine for dry-mix mortar production according to claim 3, characterized in that: The inner wall of the shell (1) is connected to a flow guide frame (7), the flow guide frame (7) is in contact with the inner wall of the shell (1), the flow guide frame (7) is arranged above the screen (6), and the top of the flow guide frame (7) is inclined downward from one end close to the shell (1) to the other end.

5. A screening machine for dry-mix mortar production according to claim 4, characterized in that: The sieve (6) is fixedly connected to a movable frame (61) on all sides, and the movable frame (61) is slidably connected to the bottom of the guide frame (7). The sieve (6) is connected to a control device (8) for controlling the sieve (6) to reciprocate in the horizontal direction.

6. A screening machine for dry-mix mortar production according to claim 5, characterized in that: The control device (8) comprises a fixed frame (81), a gear (82) and a rack (83); the fixed frame (81) is connected to the inner wall of the shell (1), and the outer wall of the fixed frame (81) is in contact with the inner wall of the shell (1); the top of the fixed frame (81) is slidably connected to the bottom of the movable frame (61); the guide frame (7), the movable frame (61) and the fixed frame (81) form a closed space; the gear (82) and the rack (83) are both arranged in the closed space; the gear (82) is sleeved on the lead screw (511); the rack (83) is fixedly connected to the movable frame (61); and the rack (83) is meshed with the gear (82).

7. A screening machine for dry-mix mortar production according to claim 3, characterized in that: The screening box (2) comprises a cover body (21) and a screening part (22); the sleeve (23) is fixedly connected to the cover body (21); the cover body (21) is fixedly connected to the clamping rod (516); the screening part (22) is fixedly connected to the fixing plate (24); the screening part (22) abuts against the cover body (21), thereby achieving sealing of the screening box (2).

8. A screening machine for dry-mix mortar production according to claim 7, characterized in that: The fixing plate (24) is provided with a thread groove, and the limiting bolt (517) extends into the thread groove and is threadedly connected to the fixing plate (24).

9. A screening machine for dry-mix mortar production according to claim 7, characterized in that: The side wall of the shell (1) is provided with a material taking hole (12), and the material taking hole (12) is capable of taking out material on the screen (6) and material in the screening portion (22). A switch door (13) connected to the shell (1) is provided in the material taking hole (12), and sealing gaskets are connected to the four sides of the switch door (13). When the switch door (13) covers the material taking hole (12), the sealing gasket abuts against the shell (1).

10. A screening machine for dry-mix mortar production according to claim 1, characterized in that: The bottom of the screening box (2) is arranged in a hemispherical surface.

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