Concrete feed opening

Abstract

The invention provides a concrete feed opening, and relates to the field of concrete production, the concrete feed opening comprises a support frame body, the support frame body is mounted on the outer side of a discharge opening in the bottom of a mixing plant, and a feed hopper is mounted at the bottom of the support frame body; an automatic unblocking mechanism is arranged in the discharging hopper. The front side and the rear side of the interior of the discharging hopper are each fixedly connected with a guide block. A frame-shaped spray washing pipe fitting is mounted on the upper side of the interior of the discharging hopper; the automatic unblocking mechanism comprises a crankshaft and an unblocking motor. Through the arrangement of the automatic unblocking mechanism, automatic unblocking can be achieved without shutdown, a traditional manual unblocking mode is replaced, potential safety hazards of high-altitude operation are eliminated, meanwhile, production interruption is effectively avoided, and the continuity and operation efficiency of concrete production are remarkably improved; the problems that blockage of an existing concrete mixing plant discharging opening mainly depends on manual blockage clearing, frequent shutdown is needed, workers need to operate at high altitude, safety risks exist, and the production efficiency is seriously affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete production, and particularly relates to a concrete discharging opening. Background Art

[0002] At present when the construction industry is booming, as an indispensable building material, the production efficiency and quality of concrete are directly related to the progress and quality of construction projects. A concrete mixing plant (station) is a key device for producing concrete in construction projects. Its discharging opening, as the passage for concrete to be discharged from the mixing main machine to the mixing tank of a concrete mixing truck, has a structural design that directly affects the production efficiency.

[0003] However, the following technical problems still exist in the actual operation of the existing concrete mixing plant discharging opening (hereinafter referred to as the discharging opening). For example, concrete is a viscous material. Especially when the aggregate particle size is uneven, the sand ratio is too high, or the viscosity of the admixture is large, it is easy to form an "arch" or "wall sticking" phenomenon at the discharging opening, resulting in a blockage problem at the discharging opening. The traditional solution relies on manual blockage removal, which not only requires frequent shutdowns (each time consuming ≥ 30 minutes), but also requires workers to operate at high altitudes, posing safety risks and seriously affecting the production efficiency. In addition, although spray cleaning pipe fittings are installed inside the discharging opening to wash the materials attached to the inner wall of the discharging opening, due to the lack of an effective protection structure for the water spray nozzles on the spray cleaning pipe fittings, it is easy for the materials inside the discharging opening to enter the water spray nozzles, causing a blockage phenomenon, thereby affecting the washing effect of the spray cleaning pipe fittings. Summary of the Invention

[0004] The present invention relates to a concrete discharging opening. Through the setting of an automatic blockage removal mechanism, during blockage removal, it can achieve automatic blockage removal without shutdown, which not only replaces the traditional manual blockage removal method, eliminates the safety hazards of high-altitude operations, but also effectively avoids production interruptions, significantly improving the continuity and operation efficiency of concrete production; through the cooperation of a shielding cover and a torsion spring, when the cleaning operation ends and the water supply equipment stops supplying water, the torsion spring's elastic force can drive the shielding cover to quickly close, achieving all-round sealing protection for the water spray nozzle, effectively solving the problem of easy blockage of traditional nozzles.

[0005] In the first aspect of the present invention, a concrete discharging port is provided, which specifically includes: a support frame body, the support frame body is installed outside the discharging port at the bottom of the mixing building, and a discharging hopper is installed at the bottom of the support frame body; an automatic blockage clearing mechanism is arranged inside the discharging hopper, and a guiding block is fixedly connected to each of the front and rear sides inside the discharging hopper; a frame-shaped spraying and cleaning pipe fitting is installed on the upper side inside the discharging hopper; the automatic blockage clearing mechanism includes a crankshaft and a blockage clearing motor, the crankshaft is rotatably connected inside the discharging hopper, and a connecting rod is rotatably connected to the outside of the journal on the crankshaft, the lower end of the connecting rod is rotatably connected to a cross-shaped sliding plate through a rotating shaft, a pushing rod is slidably connected to each of the left and right sides of the cross-shaped sliding plate, circular limiting blocks are arranged at the upper ends of the two pushing rods, the lower ends of the two pushing rods are fixedly connected to a blockage clearing long rod through a fixing plate, a spring is sleeved on each pushing rod, two guiding rods are fixedly connected to the upper end surface of the cross-shaped sliding plate, and the two guiding rods are respectively slidably connected to the two guiding blocks, the blockage clearing motor is installed on the front side of the discharging hopper, a driving pulley is installed on the rotating shaft of the blockage clearing motor, a driven pulley is installed on the crankshaft, and the driven pulley is in transmission connection with the driving pulley through a belt.

[0006] In at least some embodiments, a Chinese character "Ri"-shaped frame is fixedly connected to the upper side inside the support frame body, and a Chinese character "Ri"-shaped sealing gasket is bonded to the bottom end surface of the Chinese character "Ri"-shaped frame. Two first rotating rods are rotatably connected to the support frame body, and a first baffle plate located inside the support frame body is fixedly connected to the outside of each first rotating rod. A first crank is fixedly connected to each of the front and rear ends of each first rotating rod, and a sliding column is fixedly connected to the lower end of the outside of each first crank.

[0007] In at least some embodiments, when the two first baffle plates are in a closed state, the upper end surfaces of the two first baffle plates are in close contact with the bottom end surface of the Chinese character "Ri"-shaped sealing gasket.

[0008] In at least some embodiments, an opening and closing driving mechanism is arranged on each of the front and rear sides of the support frame body. The opening and closing driving mechanism includes sliding blocks, driving screws, and a synchronous motor. The number of sliding blocks is two, and a slide rail is slidably connected to each of the upper and lower sides of the two sliding blocks. The two slide rails are fixedly connected to the outside of the support frame body. The driving screw is rotatably connected to the outside of the support frame body, and two reverse threads are symmetrically arranged on the outside of the driving screw in the left-right direction. Two threaded cylinders are connected to the outside of the driving screw through the two reverse threads, and the two threaded cylinders are respectively fixedly connected to the two sliding blocks. The synchronous motor is installed on the right side outside the support frame body, and the rotating shaft of the synchronous motor is fixedly connected to the right end of the driving screw. A rectangular through hole is opened on the front end surface of each sliding block, and the rectangular through hole is slidably connected to the sliding column.

[0009] In at least some embodiments, a blanking frame is installed at the lower blanking port of the blanking hopper, and a rubber funnel is fixedly connected to the bottom of the blanking frame; a second rotating rod is rotatably connected to the blanking frame, and a second baffle plate located inside the blanking frame is fixedly connected to the second rotating rod. Both the front and rear ends of the second rotating rod are fixedly connected with a second crank, and the lower end of each second crank is rotatably connected with a connecting piece through a rotating shaft. A cylinder is rotatably connected to the right part of the front and rear sides of the blanking frame, and the left ends of the telescopic rods of the two cylinders are respectively fixedly connected with the two connecting pieces.

[0010] In at least some embodiments, a frame-shaped sealing rubber pad is arranged on the upper side inside the blanking frame. When the second baffle plate is in the closed state, the upper end surface of the second baffle plate is in close contact with the bottom end surface of the frame-shaped sealing rubber pad.

[0011] In at least some embodiments, the right water inlet of the frame-shaped spray pipe fitting is connected with a water delivery pipe fitting penetrating through the right side wall of the blanking hopper. Eight spray nozzles are evenly arranged on the four end faces of the inner circumference of the frame-shaped spray pipe fitting. The head end of each spray nozzle is rotatably connected with a shielding cover through a rotating shaft, and a torsion spring is sleeved outside each rotating shaft.

[0012] In at least some embodiments, when the spray nozzle stops spraying water, the torsion spring forces the shielding cover to automatically close.

[0013] The present invention provides a concrete blanking port, which has the following beneficial effects: Through the setting of the automatic blockage clearing mechanism, during the blanking process, when a blockage occurs at the lower blanking port of the blanking hopper, the staff only needs to start the blockage clearing motor, and it can drive the blockage clearing long rod to move up and down reciprocally. The material blocked in the lower blanking port of the blanking hopper is pushed downward by the downward moving blockage clearing long rod, realizing automatic blockage clearing without stopping the machine. It not only replaces the traditional manual blockage clearing method, eliminates the safety hazards of high-altitude operations, but also effectively avoids production interruption, significantly improving the continuity and operation efficiency of concrete production.

[0014] Through the cooperation of the shielding cover and the torsion spring, when the cleaning operation is over and the water supply equipment stops supplying water, under the elastic action of the torsion spring, the shielding cover is driven to quickly close, realizing the all-round sealing protection of the spray nozzle, thereby effectively preventing the phenomenon that concrete materials enter the inside of the spray nozzle, effectively solving the technical problem of easy blockage of traditional nozzles, and ensuring the long-term stable operation of the flushing operation and the continuous and efficient cleaning effect.

[0015] Through the setting of the opening and closing drive mechanism, when it is necessary to open the two first baffle plates, the two synchronous motors can be controlled to operate synchronously, so that the four threaded cylinders move outward simultaneously under the action of the reverse threads outside the drive screw, driving the four sliding blocks, and then driving the four sliding columns to rotate outward, forcing the lower ends of the four first cranks to rotate outward. Finally, the two first baffle plates can be accurately and synchronously opened, ensuring the high synchronism and stability of the opening and closing actions of the first baffle plates, and greatly improving the control accuracy and operation reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0017] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0018] In the drawings: Figure 1 The structural schematic diagram of the first perspective of the present application is shown; Figure 2 The structural schematic diagram of the second perspective of the present application is shown; Figure 3 The structural schematic diagram of the present application in a disassembled state is shown; Figure 4 The structural schematic diagram of the first rotating rod, the first baffle plate, the first crank, the sliding column and the opening and closing drive mechanism of the present application is shown; Figure 5 The structural schematic diagram of the sliding column and the rectangular through-port of the present application is shown; Figure 6 The structural schematic diagram of the partial cross-section of the feeding hopper and the feeding frame of the present application is shown; Figure 7 The structural schematic diagram of the guide block and the automatic blockage clearing mechanism of the present application is shown; Figure 8 The structural schematic diagram of the frame-shaped spray pipe fitting of the present application is shown; Figure 9 The Figure 8 structural schematic diagram of the partial enlargement at A in the present application is shown.

[0019] LIST OF REFERENCE NUMERALS 1. Support frame body; 101. H-shaped frame; 102. H-shaped sealing gasket; 103. First rotating rod; 104. First baffle plate; 105. First crank; 106. Sliding column; 2. Feeding hopper; 201. Guide block; 3. Blanking frame; 301. Second rotating rod; 302. Second baffle; 303. Second crank; 304. Cylinder; 305. Connecting piece; 306. Frame-shaped sealing rubber gasket; 4. Rubber funnel; 5. Automatic blockage clearing mechanism; 501. Crankshaft; 502. Connecting rod; 503. Cross-shaped sliding plate; 504. Top push rod; 505. Blockage clearing long rod; 506. Guide rod; 507. Blockage clearing motor; 6. Opening and closing driving mechanism; 601. Sliding block; 602. Slide rail; 603. Driving screw; 604. Synchronous motor; 605. Rectangular through opening; 606. Threaded cylinder; 7. Frame-shaped spray cleaning pipe fitting; 701. Water delivery pipe fitting; 702. Spraying head; 703. Rotating shaft; 704. Shielding cover; 705. Torsion spring. Specific embodiments

[0020] For the purposes of making the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0021] Embodiment 1: Please refer to Figures 1 to 9 : The present invention provides a concrete discharging port, comprising: a support frame body 1, which is installed outside the discharging port at the bottom of the mixing building, and a discharging hopper 2 is installed at the bottom of the support frame body 1; an automatic blockage clearing mechanism 5 is arranged inside the discharging hopper 2, and a guiding block 201 is fixedly connected to each of the front and rear sides inside the discharging hopper 2; a frame-shaped spraying and cleaning pipe fitting 7 is installed on the upper side inside the discharging hopper 2; the automatic blockage clearing mechanism 5 includes a crankshaft 501 and a blockage clearing motor 507, the crankshaft 501 is rotatably connected inside the discharging hopper 2, and a connecting rod 502 is rotatably connected to the outer part of the journal on the crankshaft 501. The lower end of the connecting rod 502 is rotatably connected to a cross-shaped sliding plate 503 through a rotating shaft. A push rod 504 is slidably connected to each of the left and right sides of the cross-shaped sliding plate 503. Circular limiting blocks are arranged at the upper ends of the two push rods 504. The lower ends of the two push rods 504 are fixedly connected to a blockage clearing long rod 505 through a fixing plate. A spring is sleeved outside each push rod 504. Two guiding rods 506 are fixedly connected to the upper end surface of the cross-shaped sliding plate 503, and the two guiding rods 506 are respectively slidably connected to the two guiding blocks 201. The blockage clearing motor 507 is installed on the front side of the discharging hopper 2. A driving pulley is installed on the rotating shaft of the blockage clearing motor 507. A driven pulley is installed on the crankshaft 501, and the driven pulley is in transmission connection with the driving pulley through a belt. Through the arrangement of the automatic blockage clearing mechanism 5, during the discharging process, when the discharging port at the lower end of the discharging hopper 2 is blocked, it can achieve automatic blockage clearing without stopping the machine. It not only replaces the traditional manual blockage clearing method, eliminates the safety hazards of high-altitude operations, but also effectively avoids production interruption, and significantly improves the continuity and operation efficiency of concrete production.

[0022] A day-shaped frame 101 is fixedly connected to the upper side inside the support frame body 1, and a day-shaped sealing gasket 102 is adhered to the bottom end surface of the day-shaped frame 101. Two first rotating rods 103 are rotatably connected to the support frame body 1, and a first baffle plate 104 located inside the support frame body 1 is fixedly connected to the outer part of each first rotating rod 103. A first crank 105 is fixedly connected to each of the front and rear ends of each first rotating rod 103, and a sliding column 106 is fixedly connected to the lower end outside each first crank 105 for cooperating with a rectangular through opening 605.

[0023] When the two first baffle plates 104 are in the closed state, the upper end surfaces of the two first baffle plates 104 are in close contact with the bottom end surface of the day-shaped sealing gasket 102, improving the sealing performance of the first baffle plates 104 in the closed state.

[0024] An opening and closing drive mechanism 6 is provided on both the front and rear sides of the support frame 1. The opening and closing drive mechanism 6 includes a sliding block 601, a drive screw 603, and a synchronous motor 604. The number of sliding blocks 601 is two, and a slide rail 602 is slidably connected to both the upper and lower sides of the two sliding blocks 601. The two slide rails 602 are fixedly connected to the outside of the support frame 1. The drive screw 603 is rotatably connected to the outside of the support frame 1, and two reverse threads are symmetrically arranged on the outside of the drive screw 603 in the left-right direction. Two threaded barrels 606 are connected to the outside of the drive screw 603 through the two reverse threads. The two threaded barrels 606 are respectively fixedly connected to the two sliding blocks 601. The synchronous motor 604 is installed on the right side outside the support frame 1, and the rotating shaft of the synchronous motor 604 is fixedly connected to the right end of the drive screw 603. A rectangular through-opening 605 is formed on the front end face of each sliding block 601, and the rectangular through-opening 605 is slidably connected to the sliding column 106; through the setting of the opening and closing drive mechanism 6, when it is necessary to wash the inner wall of the feeding hopper 2, the two first baffle plates 104 can be closed in advance to block the concrete material inside the support frame 1, so that it is not necessary to wait until a batch of concrete is produced before cleaning the inner wall of the feeding hopper 2. Therefore, the convenience of cleaning the inner wall of the feeding hopper 2 is improved.

[0025] A feeding frame 3 is installed at the lower feeding port of the feeding hopper 2, and a rubber funnel 4 is fixedly connected to the bottom of the feeding frame 3; a second rotating rod 301 is rotatably connected to the feeding frame 3, and a second baffle plate 302 located inside the feeding frame 3 is fixedly connected to the second rotating rod 301. A second crank 303 is fixedly connected to both the front and rear ends of the second rotating rod 301, and a connecting member 305 is rotatably connected to the lower end of each second crank 303 through a rotating shaft. A cylinder 304 is rotatably connected to the right part of both the front and rear sides of the feeding frame 3, and the left ends of the telescopic rods of the two cylinders 304 are respectively fixedly connected to the two connecting members 305. Through the cooperation of the cylinder 304, the connecting member 305 and the second crank 303, the second baffle plate 302 can be driven to perform an opening and closing movement.

[0026] A frame-shaped sealing gasket 306 is arranged on the upper side inside the feeding frame 3. When the second baffle plate 302 is in the closed state, the upper end face of the second baffle plate 302 is in close contact with the bottom end face of the frame-shaped sealing gasket 306, improving the sealing performance of the second baffle plate 302 after closing.

[0027] Embodiment 2, on the basis of Embodiment 1, such as Figure 2 、 Figure 8 and Figure 9As shown in the figure, the right water inlet of the frame-shaped spray cleaning pipe fitting 7 is connected to a water pipe fitting 701 that penetrates through the right side wall of the blanking hopper 2. The other end of the water pipe fitting 701 is connected to the water outlet of the water supply device. Eight spray nozzles 702 are evenly arranged on the four end faces of the inner circumference of the frame-shaped spray cleaning pipe fitting 7. The head end of each spray nozzle 702 is rotatably connected to a shielding cover 704 through a rotating shaft 703. A torsion spring 705 is sleeved outside each rotating shaft 703. When the spray nozzle 702 stops spraying water, the shielding cover 704 is forced to close automatically through the torsion spring 705. At this time, the spray nozzle 702 can be hermetically protected, effectively preventing the concrete material from entering the inside of the spray nozzle 702, and effectively solving the problem of easy blockage of the traditional nozzle.

[0028] The working principle of this embodiment: When in use, after the concrete in the concrete mixing plant is mixed well and needs to be discharged, first, the external controller is used to control the synchronous operation of the two synchronous motors 604, so as to drive the two driving screws 603 to rotate synchronously. At this time, the four threaded cylinders 606 move outward simultaneously with the four sliding blocks 601 under the action of the reverse threads on the outside of the driving screws 603, driving the four sliding columns 106 to rotate outward, forcing the lower ends of the four first cranks 105 to rotate outward, driving the two first baffle plates 104 to rotate and open. At this time, the concrete in the concrete mixing plant falls into the blanking hopper 2. Then, the telescopic rods of the two cylinders 304 are extended to move the two connecting pieces 305 to the left, and then drive the lower ends of the two second cranks 303 to rotate to the left, driving the second rotating rod 301 to rotate clockwise to open the second baffle plate 302, and discharging the concrete in the blanking hopper 2 into the mixing bucket of the concrete mixing truck. Thus, the concrete discharging work is completed.

[0029] During the discharging process, when the discharging port at the lower end of the blanking hopper 2 is blocked, the staff can start the clogging clearing motor 507 through the external controller to drive the crankshaft 501 to rotate. Then, the upper end of the connecting rod 502 rotates through the journal on the crankshaft 501. At this time, the lower end of the connecting rod 502 drives the cross-shaped sliding plate 503, the two top push rods 504 and the clogging clearing long rod 505 to move up and down reciprocally. The clogging clearing long rod 505 that moves downward pushes the material blocked in the discharging port at the lower end of the blanking hopper 2 downward, so as to be able to replace manual clogging clearing. It not only does not require shutdown operation, but also is more labor-saving. And the staff does not need to operate at high altitude, reducing safety hazards while improving the concrete production efficiency.

[0030] When it is necessary to flush the inner wall of the lower hopper 2, clean water can be conveyed to the inside of the frame-shaped spray pipe 7 through the water conveying pipe 701 by an external water conveying device, and the shielding cover 704 rotatably connected to the water spray head 702 is pushed open under the action of water pressure, and then the clean water is sprayed to the inner wall of the lower hopper 2 to flush the inner wall of the lower hopper 2; after the cleaning work of the inner wall of the lower hopper 2 is completed, the external water conveying device stops conveying water, and the water spray head 702 no longer sprays water, and then the shielding cover 704 is quickly closed under the elastic force of the torsion spring 705, which effectively protects the water spray head 702 that does not spray water, so that the material is not easy to enter the water spray head 702, effectively avoiding the phenomenon of clogging of the water spray head 702 and preventing the flushing effect from being affected.

Claims

1. A concrete discharge port, comprising: A support frame (1), the support frame (1) being installed outside the discharge port at the bottom of the mixing tower, and a lower hopper (2) being installed at the bottom of the support frame (1); characterized in that an automatic clearing mechanism (5) is provided inside the lower hopper (2), and a guide block (201) is fixedly connected to both the front and rear sides of the lower hopper (2); a frame-shaped spray pipe (7) is installed on the upper side of the lower hopper (2); The automatic blockage clearing mechanism (5) comprises a crankshaft (501) and a blockage clearing motor (507), wherein the crankshaft (501) is rotatably connected to the interior of the lower hopper (2), and a connecting rod (502) is rotatably connected to the exterior of the journal on the crankshaft (501), and the lower end of the connecting rod (502) is rotatably connected to a cross-shaped sliding plate (503) via a rotating shaft, and a push rod (504) is slidably connected to the left and right sides of the cross-shaped sliding plate (503), and the upper ends of the two push rods (504) are each provided with a circular limiting block, and the lower ends of the two push rods (504) are connected to the A long rod (505) for clearing blockage is fixedly connected to the fixed plate, and a spring is sleeved on the outside of each push rod (504). Two guide rods (506) are fixedly connected to the upper end surface of the cross-shaped sliding plate (503), and the two guide rods (506) are respectively slidably connected to the two guide blocks (201). The clearing blockage motor (507) is installed on the front side of the lower hopper (2), and a driving pulley is installed on the rotating shaft of the clearing blockage motor (507). A driven pulley is installed on the crankshaft (501), and the driven pulley is connected to the driving pulley through a belt.

2. A concrete discharge port according to claim 1, characterized in that: A Japanese-shaped frame (101) is fixedly connected to the upper side of the inner part of the support frame (1), and a Japanese-shaped sealing pad (102) is bonded to the bottom end surface of the Japanese-shaped frame (101); two first rotating rods (103) are rotatably connected to the support frame (1), and each first rotating rod (103) is fixedly connected to a first material baffle plate (104) located inside the support frame (1); each first rotating rod (103) is fixedly connected to a first crank (105) at both ends, and a sliding column (106) is fixedly connected to the lower end of the outer side of each first crank (105).

3. A concrete discharge port according to claim 2, characterized in that: When the two first material baffle plates (104) are in a closed state, the upper end surfaces of the two first material baffle plates (104) are in close contact with the bottom end surface of the Japanese-shaped sealing rubber pad (102).

4. A concrete discharge port according to claim 2, characterized in that: The support frame (1) is provided with an opening and closing drive mechanism (6) on both the front and rear sides. The opening and closing drive mechanism (6) comprises a sliding block (601), a driving screw (603) and a synchronous motor (604). The number of the sliding blocks (601) is two, and the upper and lower sides of the two sliding blocks (601) are both slidably connected to a slide rail (602). The two slide rails (602) are fixedly connected to the outside of the support frame (1). The driving screw (603) is rotatably connected to the outside of the support frame (1), and the outside of the driving screw (603) is left-handed. Two reverse threads are provided in a right-side symmetrical shape, and the outside of the driving screw (603) is connected to two threaded barrels (606) through the two reverse threads. The two threaded barrels (606) are respectively fixedly connected to the two sliding blocks (601). The synchronous motor (604) is installed on the right side of the outside of the support frame (1), and the rotating shaft of the synchronous motor (604) is fixedly connected to the right end of the driving screw (603). A rectangular opening (605) is opened on the front end surface of each sliding block (601), and the rectangular opening (605) is slidably connected to the sliding column (106).

5. A concrete discharge port according to claim 1, characterized in that: A material discharging frame (3) is installed at the material discharging opening at the lower end of the material discharging hopper (2), and a rubber funnel (4) is fixedly connected to the bottom of the material discharging frame (3); a second rotating rod (301) is rotatably connected to the material discharging frame (3), and a second material blocking plate (302) located inside the material discharging frame (3) is fixedly connected to the second rotating rod (301); a second crank (303) is fixedly connected to both the front and rear ends of the second rotating rod (301), and the lower end of each second crank (303) is rotatably connected to a connecting piece (305) via a rotating shaft; a cylinder (304) is rotatably connected to the right parts of both the front and rear sides of the material discharging frame (3), and the left ends of the telescopic rods of the two cylinders (304) are respectively fixedly connected to the two connecting pieces (305).

6. A concrete discharge port according to claim 5, characterized in that: A frame-shaped sealing rubber pad (306) is provided on the upper inner side of the material unloading frame (3); when the second material baffle plate (302) is in a closed state, the upper end surface of the second material baffle plate (302) is in close contact with the bottom end surface of the frame-shaped sealing rubber pad (306).

7. A concrete discharge port according to claim 1, characterized in that: The right water inlet of the frame-shaped spray pipe (7) is connected to a water delivery pipe (701) penetrating the right wall of the lower hopper (2); eight spray heads (702) are evenly arranged on four end surfaces around the inside of the frame-shaped spray pipe (7); the head end of each spray head (702) is rotatably connected to a shielding cover (704) via a rotating shaft (703); and a torsion spring (705) is sleeved on the outside of each rotating shaft (703).

8. A concrete discharge port according to claim 7, characterized in that: When the water spray head (702) stops spraying water, the shielding cover (704) is forced to close automatically by the torsion spring (705).

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