Discharging control device of sand mixer

Abstract

The invention relates to the technical field of sand mixers, and discloses a sand mixer discharging control device which comprises a first material guide pipe, a discharging pipe, a second material guide pipe and a flow adjusting seat. By rotating a second hand wheel, a screw rod on one side of the second hand wheel extrudes a compressed air bag in a gate plate, air passes through a flow dividing pipe through an air guide pipe and then flows into a corresponding air injection cylinder through a connecting pipe, and after an internal piston is pushed, the movable end of the air injection cylinder can push a rack to slide in a first sliding groove; the four groups of symmetrical interception plates can draw close along an interception opening, the interception opening can be intercepted and closed, and a discharging opening in the bottom of a discharging pipe can be cut off in time, and at the moment, a reset spring outside an air injection cylinder generates stretching elastic force; therefore, when the flashboard and the sealing ring in the flow adjusting seat have insufficient tightness to the pipe orifice or are disassembled, assembled and overhauled, quicksand in the discharge pipe can be cut off in time, and more sand leakage at the pipe orifice is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of sand mixers, in particular to a material discharging control device for a sand mixer. Background Art

[0002] Sand mixer is a device that mixes the components in the molding sand evenly and effectively coats the surface of the sand particles with the binder. The sand mixer utilizes the relative movement of the grinding wheel and the grinding disc to crush the material placed between the two by means of grinding and crushing. The sand mixer mixes the material while crushing it.

[0003] For example, the Chinese patent authorization announcement number is CN212718287U, "discloses a sand mixer discharge control device, including a control body, an automatic flow adjustment structure, a sealing structure, a control cleaning structure and an adjustment angle display structure, the upper end of the control body is connected to a connecting disc seat, and the inside of the connecting disc seat is provided with connecting bolts, and the inside of the sealing structure runs through an adjustment shaft, the adjustment angle display structure is connected to the right end of the adjustment shaft, and the adjustment angle display structure includes a display disc, a pointer and a connecting shaft, and the control cleaning structure is arranged on the outside of the adjustment angle display structure";

[0004] The automatic flow adjustment structure set in the above-mentioned comparative document can facilitate automatic control of the flow of the sand mixer, and the opening degree inside the control body can be adjusted by driving the sealing structure, so as to achieve the effect of controlling the material flow. The sealing of the connection can be ensured by the fit between the sealing structure and the control body.

[0005] When the existing automatic flow control device of the sand mixer is in use, a flow regulating mechanism is set at the discharge port to adjust the discharge port, thereby adjusting the flow of quicksand. However, when the gate plate in the flow regulating seat at the discharge port is not closed tightly and the sealing component is damaged, there is a lack of blocking and intercepting parts, and the quicksand at the pipe mouth is urgently cut off, resulting in continuous discharge of quicksand and leakage of quicksand. At the same time, when the gate plate in the flow regulating seat is disassembled and repaired, there is a lack of temporary interception mechanism inside, which is not convenient to use. Summary of the invention

[0006] The object of the present invention is to provide a discharge control device for a sand mixer. The automatic flow control device for a sand mixer can realize quick interception of the pipe mouth when the gate plate in the flow control component is damaged or the disassembled component is repaired, thereby preventing excessive leakage of the quicksand and having a good pressure relief effect on the flow control component.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a material discharging control device for a sand mixer, comprising a first material guide pipe, a discharge pipe, a second material guide pipe, and a flow regulating seat, wherein a gate is rotatably installed inside the flow regulating seat through a rotating shaft, a first hand wheel is fixedly connected to the end of the rotating shaft on one side of the gate, a second hand wheel is arranged on the side of the gate away from the first hand wheel, a screw is fixedly installed on one side of the second hand wheel, and the screw is connected to the inner wall of the flow regulating seat through a threaded connection, a compressed air bag is installed inside the gate, an air guide pipe is fixedly penetrated and connected to the exhaust end of the compressed air bag, a retention device box is detachably installed between the first material guide pipe and the second material guide pipe, a device groove is arranged inside the retention device box, and retention mechanisms are arranged at equal intervals on the circumference of the device groove, and the The retention mechanism includes four groups of retention plates arranged at equal intervals around the circumference, a rack is fixedly installed at the circumference of the bottom of the retention plate, an air injection cylinder and a locking mechanism are arranged at equal intervals on the circumference of the bottom wall of the device groove, a piston end inside the air injection cylinder is fixedly connected with a push rod, the end of the push rod away from the air injection cylinder is fixedly connected to the corresponding end of the rack, a reset spring is fixedly installed between the air injection cylinder and the rack, the locking mechanism includes a ratchet, a synchronous gear, and a pawl, the outer edge of the pawl is meshed with the outer edge of the ratchet, an adjusting gear is arranged at the bottom of the pawl, a torsion spring is fixedly installed between the adjusting gear and the bottom of the inner wall of the device groove, and adjusting tooth blocks are slidably connected at equal intervals on the circumference of the bottom of the inner wall of the device groove, and the outer edge of the adjusting tooth block is meshed with the corresponding outer edge of the adjusting gear.

[0008] Preferably, a retention opening is provided between the first material guiding tube and the second material guiding tube, and the four groups of retention plates slide in the inner wall of the retention opening.

[0009] Preferably, guide grooves are provided at equal intervals on the circumference of the top of the interception device box, a connecting rod is fixedly installed on the top of the adjusting gear block, the connecting rod movably passes through the guide groove and extends to the top of the interception device box, and a swivel is fixedly connected to the top of the connecting rod.

[0010] Preferably, the compression airbag is fixedly installed in the inner wall of the gate plate near the first hand wheel, an air hole is opened through the bottom of the gate plate, a screw on one side of the second hand wheel movably penetrates into the inner cavity of the gate plate, and the end of the screw away from the second hand wheel is rotatably connected to the side of the compression airbag away from the first hand wheel.

[0011] Preferably, a shunt pipe is fixedly installed at the top circumference of the interception device box, the air guide pipe is connected to the shunt pipe, and the shunt pipe is connected to the inner cavity of the gas injection cylinder through a connecting pipe.

[0012] Preferably, a sand flowing pipe is integrally formed at the top of the second conduit, a conveying blade is arranged inside the sand flowing pipe, and a sealing ring is fixedly installed at the top edge of the gate plate.

[0013] Preferably, a mounting block is fixedly installed between the gas injection cylinder and the inner wall of the device groove, and first sliding grooves are opened at equal intervals on the circumference of the inner wall of the device groove, and the rack slides in the corresponding inner wall of the first sliding groove.

[0014] Preferably, second sliding grooves are provided at equal intervals on the circumference of the inner wall of the device groove, and the adjusting tooth block slides in the inner wall of the second sliding groove.

[0015] Preferably, each group of the ratchets and the synchronous gear arranged at the bottom are rotatably installed on the bottom of the inner wall of the device groove through a rotating shaft, and each group of the pawls and the adjusting gear arranged at the bottom are rotatably installed on the bottom of the inner wall of the device groove through a rotating shaft.

[0016] Preferably, the outer edge of the synchronous gear is meshed with the outer edge of the corresponding rack, and the outer edge of the adjusting tooth block is meshed with the outer edge of the corresponding adjusting gear.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention rotates the second hand wheel, and a screw on one side of the second hand wheel squeezes the compressed air bag inside the gate plate, and the gas passes through the air guide pipe and the shunt pipe, and then flows into the corresponding gas injection cylinder through the connecting pipe, and after pushing the internal piston, the movable end of the gas injection cylinder can push the rack to slide in the first slide groove, so that the four groups of symmetrical interception plates can be close to each other along the interception opening, and the interception opening can be intercepted and closed, so that the discharge opening at the bottom of the discharge pipe is timely cut off. At this time, the reset spring outside the gas injection cylinder generates a tensile elastic force, so that when the gate plate and the sealing ring in the flow regulating seat are not sealed enough to the pipe opening or are disassembled for maintenance, the flowing sand in the discharge pipe can be cut off in time to avoid a lot of sand leakage at the pipe opening;

[0019] When the gate plate and the sealing member in the flow regulating seat are disassembled and overhauled, the intercepting plate intercepts the flowing sand at the intercepting port. At this time, the rack slides in the first slide groove to one side of the intercepting port, and the synchronous gear can be synchronously driven by the rack, and the ratchet on the top of the synchronous gear rotates synchronously. The ratchet is one-way meshed and positioned by the corresponding pawl and the torsion spring. In this way, after the gate plate in the flow regulating seat is disassembled, when the compressed air bag cannot continuously provide thrust to the air injection cylinder, the rack can still be positioned at the intercepting port, so that after the flow regulating seat, the gate plate and the internal compressed air bag are disassembled and assembled, the flowing sand at the intercepting port can still be continuously closed by the intercepting plate. At the same time, when the gate plate is closed at the discharge pipe, when the top of the gate plate is pressed by the flowing sand, the flowing sand on the top of the gate plate can be separated by the interception mechanism, thereby alleviating the continuous pressure on the gate plate.

[0020] The present invention rotates the swivel ring, and the swivel ring transmits the adjusting tooth block through the connecting rod, so that the adjusting tooth block can drive the adjusting gear at the bottom of the corresponding ratchet to overcome the torsion force of the torsion spring, so that the four groups of corresponding ratchets can be released from position at the same time, so that the rack can be reset to the side of the first slide groove away from the interception port under the elastic force of the reset spring, thereby realizing the rapid reset of the interception plate at the interception port, so that the gate plate in the flow adjustment seat replaced below can continue to be used for flow adjustment of the quicksand. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It is a schematic diagram of the side cross-section structure of the quicksand pipe in the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the interception device box in the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the first material guide pipe in the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the interception plate in the present invention;

[0026] Figure 6 for Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0027] Figure 7 for Figure 3 A schematic diagram of the partially enlarged structure at B in the middle;

[0028] Figure 8 for Figure 5 Schematic diagram of the partial enlarged structure at point C in the middle.

[0029] In the figure: 1, interception device box; 2, flow adjustment seat; 3, quicksand pipe; 4, feeding blade; 5, interception mechanism; 6, air injection cylinder; 7, locking mechanism; 10, first material guide pipe; 11, interception port; 12, device groove; 13, guide groove; 20, discharge pipe; 21, first hand wheel; 22, second hand wheel; 23, gate; 221, compressed air bag; 222, air hole; 223, air guide pipe; 224, shunt pipe; 231, sealing ring; 30, second material guide pipe; 51, interception plate; 52, rack; 53, first slide groove; 61, push rod; 62, mounting block; 63, reset spring; 71, ratchet; 72, synchronous gear; 73, pawl; 74, adjusting gear; 75, torsion spring; 76, adjusting tooth block; 77, connecting rod; 78, swivel; 761, second slide groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Embodiment 1:

[0032] This embodiment introduces a sand mixer discharge control device. Figure 1-Figure 8 As shown, a material discharging control device for a sand mixer comprises a first material guide pipe 10, a material discharge pipe 20, a second material guide pipe 30, and a flow regulating seat 2. Gate plates 23 are rotatably installed on both sides of the inner wall of the flow regulating seat 2 through a rotating shaft. A first hand wheel 21 is fixedly connected to the end of the rotating shaft on one side of the gate plate 23. A second hand wheel 22 is arranged on the side of the gate plate 23 away from the first hand wheel 21. A screw is fixedly installed on one side of the second hand wheel 22, and the screw is connected to the inner wall of the flow regulating seat 2 through a thread. A compressed air bag 221 is installed inside the gate plate 23, and an air guide pipe 223 is fixedly connected through the exhaust end of the compressed air bag 221.

[0033] The first hand wheel 21 in the flow regulating seat 2 can drive the gate plate 23 to adjust the closing size at the material opening of the discharge pipe 20, and the sealing ring 231 on the top of the gate plate 23 can fit tightly with the inner wall of the material opening, so as to control the flow of the flowing sand inside the discharge pipe 20;

[0034] In this embodiment, by rotating the second hand wheel 22, a screw on one side of the second hand wheel 22 squeezes the compressed air bag 221 inside the gate plate 23, and the compressed gas passes through the air guide pipe 223 and the shunt pipe 224, thereby flowing into the corresponding gas injection cylinder 6 through the connecting pipe, and after pushing the internal piston, the movable end of the gas injection cylinder 6 can push the rack 52 to slide in the first slide groove 53, so that the four groups of symmetrical intercepting plates 51 can be brought together along the intercepting opening 11, and the intercepting opening 11 can be intercepted and closed, so that the discharge opening at the bottom of the discharge pipe 20 is timely cut off. At this time, the return spring 63 outside the gas injection cylinder 6 generates a tensile elastic force, so that when the gate plate 23 and the sealing ring 231 in the flow regulating seat 2 are not sealed enough to the pipe opening or when they are disassembled for maintenance, the flowing sand in the discharge pipe 20 can be cut off in time to avoid a lot of sand leakage at the pipe opening;

[0035] Among them, a retention opening 11 is arranged between the first material guide pipe 10 and the second material guide pipe 30, and four groups of retention plates 51 slide in the inner wall of the retention opening 11. When the gate plate 23 and the sealing ring 231 in the flow regulating seat 2 cannot seal and block the quicksand, the retention plate 51 slides along the retention opening 11 to close the retention opening 11, so that the retention opening 11 is retained and closed, thereby realizing timely cutting off of the discharge opening at the bottom of the discharge pipe 20.

[0036] Among them, the compressed air bag 221 is fixedly installed on the inner wall of the gate plate 23 near the side of the first hand wheel 21, and an air hole 222 is opened through the bottom of the gate plate 23. The screw on one side of the second hand wheel 22 movably penetrates into the inner cavity of the gate plate 23, and the end of the screw away from the second hand wheel 22 is rotatably connected to the side of the compressed air bag 221 away from the first hand wheel 21. By rotating the second hand wheel 22, the screw on one side of the second hand wheel 22 squeezes the compressed air bag 221 inside the gate plate 23, and the compressed air bag 221 inhales and exhausts through the air hole 222 at the bottom of the gate plate 23, so that the gas inside the compressed air bag 221 passes through the air guide pipe 223 and the shunt pipe 224, and then flows into the corresponding gas injection cylinder 6 through the connecting pipe.

[0037] Among them, a shunt pipe 224 is fixedly installed at the top circumference of the interception device box 1, the air guide pipe 223 is connected to the shunt pipe 224, the shunt pipe 224 is connected to the inner cavity of the gas injection cylinder 6 through a connecting pipe, a quicksand pipe 3 is integrally formed on the top of the second material guide pipe 30, a material conveying blade 4 is arranged inside the quicksand pipe 3, a sealing ring 231 is fixedly installed at the top edge of the gate 23, a mounting block 62 is fixedly installed between the gas injection cylinder 6 and the inner wall of the device groove 12, first slide grooves 53 are opened at equal intervals on the circumference of the inner wall of the device groove 12, the rack 52 slides in the corresponding inner wall of the first slide groove 53, the compressed gas flows into the corresponding gas injection cylinder 6, and after pushing the internal piston, the movable end of the gas injection cylinder 6 can push the rack 52 to slide in the first slide groove 53, so that the four groups of symmetrical retention plates 51 can be close to each other along the retention opening 11, and the retention opening 11 can be retained and closed, so as to realize the timely cutoff of the discharge opening at the bottom of the discharge pipe 20.

[0038] Embodiment 2:

[0039] Based on Example 1, this example introduces a sand mixer discharge control device, such as Figure 5-Figure 8 As shown, a retention device box 1 is detachably installed between the first material guide tube 10 and the second material guide tube 30, a device groove 12 is arranged inside the retention device box 1, and a retention mechanism 5 is arranged at equal intervals on the circumference of the bottom of the inner wall of the device groove 12, and the retention mechanism 5 includes four groups of retention plates 51 arranged at equal intervals on the circumference, and a rack 52 is fixedly installed on the circumference of the bottom of the retention plate 51, and an air injection cylinder 6 and a locking mechanism 7 are respectively arranged at equal intervals on the inner wall of the device groove 12. A push rod 61 is fixedly connected to the piston end of the air injection cylinder 6, and the end of the push rod 61 away from the air injection cylinder 6 is fixedly connected to the corresponding end of the rack 52, and a return spring 63 is fixedly installed between the air injection cylinder 6 and the rack 52;

[0040] In this embodiment, when the gate plate 23 and the seal in the flow regulating seat 2 are disassembled and repaired, the interception plate 51 is cut off by the quicksand at the interception port 11. At this time, the rack 52 slides in the first slide groove 53 to the side of the interception port 11. At the same time, the synchronous gear 72 can be synchronously driven by the rack 52, and the ratchet 71 on the top of the synchronous gear 72 rotates synchronously. The ratchet 71 is matched with the corresponding pawl 73 and the torsion spring 75 for one-way meshing positioning. In this way, after the gate plate 23 in the flow regulating seat 2 is disassembled, the pressure When the compressed air bag 221 cannot continuously provide thrust to the air injection cylinder 6, the rack 52 can still be positioned at the interception port 11, so that after the flow regulating seat 2, the gate plate 23 and the internal compressed air bag 221 are disassembled and assembled, the quicksand at the interception port 11 can still be continuously closed by the interception plate 51. At the same time, when the gate plate 23 and the discharge pipe 20 are closed, when the top of the gate plate 23 is pressed by the quicksand, the quicksand on the top of the gate plate 23 can be separated by the interception mechanism 5, thereby relieving the continuous pressure on the gate plate 23.

[0041] Among them, each group of ratchets 71 and the synchronous gear 72 set at the bottom are rotatably installed at the bottom of the inner wall of the device groove 12 through a rotating shaft, and each group of ratchet pawls 73 and the adjusting gear 74 set at the bottom are rotatably installed at the bottom of the inner wall of the device groove 12 through a rotating shaft. After the retention plate 51 cuts off the quicksand at the retention port 11, the rack 52 slides to the side of the retention port 11 in the first slide groove 53. At the same time, the synchronous gear 72 can be synchronously driven by the rack 52, and the ratchet 71 on the top of the synchronous gear 72 rotates synchronously. The ratchet 71 is cooperated with the corresponding ratchet pawl 73 and the torsion spring 75 for one-way meshing positioning. In this way, after the gate plate 23 in the flow regulating seat 2 is disassembled, when the compressed air bag 221 cannot continue to provide thrust to the injection cylinder 6, the rack 52 can still be positioned at the retention port 11.

[0042] Embodiment 3:

[0043] Based on Example 2, this example introduces a sand mixer discharge control device, such as Figure 3-Figure 5 As shown, the locking mechanism 7 includes a ratchet 71, a synchronous gear 72, and a pawl 73. The outer edge of the pawl 73 is meshed with the outer edge of the ratchet 71. An adjusting gear 74 is provided at the bottom of the pawl 73. A torsion spring 75 is fixedly installed between the adjusting gear 74 and the bottom of the inner wall of the device slot 12. Adjusting tooth blocks 76 are slidably connected at equal intervals on the circumference of the bottom of the inner wall of the device slot 12. The outer edge of the adjusting tooth block 76 is meshed with the outer edge of the corresponding adjusting gear 74.

[0044] In this embodiment, by rotating the swivel 78, the swivel 78 transmits the adjustment tooth block 76 through the connecting rod 77, so that the adjustment tooth block 76 can drive the adjustment gear 74 at the bottom of the corresponding pawl 73 to overcome the torque of the torsion spring 75. In this way, the four groups of corresponding ratchet wheels 71 can be released from their positions at the same time, so that the rack 52 can be reset to the side of the first slide groove 53 away from the retention port 11 under the elastic force of the reset spring 63, thereby realizing the rapid reset of the retention plate 51 at the retention port 11, so that the gate plate 23 in the flow adjustment seat 2 replaced below can continue to be used for flow adjustment of the quicksand.

[0045] Among them, guide grooves 13 are opened at equal intervals on the circumference of the top of the retention device box 1, and a connecting rod 77 is fixedly installed on the top of the adjusting tooth block 76. The connecting rod 77 movably passes through the guide groove 13 and extends to the top of the retention device box 1. A swivel 78 is fixedly connected to the top of the connecting rod 77. By rotating the swivel 78, the swivel 78 transmits the adjusting tooth block 76 through the connecting rod 77, so that the adjusting tooth block 76 can drive the adjusting gear 74 at the bottom of the corresponding ratchet 73 to overcome the torsion of the torsion spring 75. In this way, the four groups of corresponding ratchet wheels 71 can be released from position at the same time, so that the rack 52 can be reset to the side of the first slide groove 53 away from the retention port 11 under the elastic force of the reset spring 63, thereby realizing the rapid reset of the retention plate 51 at the retention port 11.

[0046] Among them, second sliding grooves 761 are opened at equal intervals on the circumference of the inner wall of the device groove 12, and the adjusting tooth block 76 slides in the inner wall of the second sliding groove 761. By rotating the rotating ring 78, the rotating ring 78 transmits the adjusting tooth block 76 through the connecting rod 77, so that the adjusting tooth block 76 can drive the adjusting gear 74 at the bottom of the corresponding ratchet 73 to overcome the torsion of the torsion spring 75. In this way, the four groups of corresponding ratchet wheels 71 can be released from position at the same time, so that the rack 52 can be reset to the side of the first sliding groove 53 away from the intercepting opening 11 under the elastic force of the reset spring 63, thereby realizing the rapid reset of the intercepting plate 51 at the intercepting opening 11.

[0047] Among them, the outer edge of the synchronous gear 72 is meshed with the outer edge of the corresponding rack 52, and the outer edge of the adjusting tooth block 76 is meshed with the outer edge of the corresponding adjusting gear 74. After the adjusting tooth block 76 is transmitted through the rotating ring 78, the adjusting tooth block 76 can slide in the corresponding second sliding groove 761, and can drive the corresponding adjusting gear 74 at the bottom of the ratchet 73 to overcome the torque of the torsion spring 75, so that the four groups of corresponding ratchet wheels 71 can be released from positioning at the same time.

[0048] Working principle: When in use, if sand leakage is found at the bottom of the discharge pipe 20 or when the gate plate 23 and the sealing ring 231 in the flow regulating seat 2 are being maintained and repaired, the second hand wheel 22 can be turned, and the screw on one side of the second hand wheel 22 squeezes the compressed air bag 221 inside the gate plate 23, and the gas passes through the air guide pipe 223 and the shunt pipe 224, and then flows into the corresponding gas injection cylinder 6 through the connecting pipe, and after pushing the internal piston, the movable end of the gas injection cylinder 6 can push the rack 52 to slide in the first slide groove 53, so that the four groups of symmetrical intercepting plates 51 can be close to each other along the intercepting port 11, and the intercepting port 11 can be intercepted and closed, so that the discharge port at the bottom of the discharge pipe 20 is cut off in time. At this time, the reset spring 63 outside the gas injection cylinder 6 generates a tensile elastic force, so that when the gate plate 23 and the sealing ring 231 in the flow regulating seat 2 are not sealed enough to the pipe port or when disassembling and repairing, the flowing sand in the discharge pipe 20 can be cut off in time to avoid more sand leakage at the pipe port;

[0049] When the cam 72 is in the closed position, the gear 72 is in the closed position, and the gear 72 is in the closed position, so that the cam ...

[0050] When the gate plate 23 and the sealing ring 231 in the flow regulating seat 2 are overhauled and replaced, the swivel ring 78 can be rotated, and the swivel ring 78 can transmit the adjusting tooth block 76 through the connecting rod 77, so that the adjusting tooth block 76 can drive the adjusting gear 74 at the bottom of the corresponding ratchet 73 to overcome the torsion of the torsion spring 75. In this way, the four groups of corresponding ratchet wheels 71 can be released from the position at the same time, so that the rack 52 can be reset to the side of the first slide groove 53 away from the interception port 11 under the elastic force of the reset spring 63, thereby realizing the rapid reset of the interception plate 51 at the interception port 11, so that the gate plate 23 in the flow regulating seat 2 below that has been replaced can continue to be used for regulating the flow of the quicksand.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes and modifications may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A material discharging control device for a sand mixer, comprising a first material guide pipe (10), a material discharge pipe (20), a second material guide pipe (30), and a flow regulating seat (2), characterized in that: Gate plates (23) are rotatably mounted on both sides of the inner wall of the flow regulating seat (2) via a rotating shaft, a first hand wheel (21) is fixedly connected to the end of the rotating shaft on one side of the gate plate (23), a second hand wheel (22) is arranged on the side of the gate plate (23) away from the first hand wheel (21), a screw is fixedly mounted on one side of the second hand wheel (22), and the screw is connected to the inner wall of the flow regulating seat (2) via a threaded connection, a compressed air bag (221) is installed inside the gate plate (23), and the compressed air bag (221) The exhaust end is fixedly connected with an air guide pipe (223), and a retention device box (1) is detachably installed between the first material guide pipe (10) and the second material guide pipe (30). The retention device box (1) is provided with a device groove (12) inside, and retention mechanisms (5) are evenly spaced on the circumference of the device groove (12). The retention mechanism (5) includes four groups of retention plates (51) arranged at equal intervals on the circumference, and the retention plates (51) are fixedly installed at the bottom circumference. A rack (52) is provided, and an air injection cylinder (6) and a locking mechanism (7) are arranged at equal intervals on the circumference of the bottom of the inner wall of the device groove (12). The piston end inside the air injection cylinder (6) is fixedly connected to a push rod (61), and the end of the push rod (61) away from the air injection cylinder (6) is fixedly connected to the corresponding end of the rack (52). A return spring (63) is fixedly installed between the air injection cylinder (6) and the rack (52). The locking mechanism (7) includes a ratchet (71), a synchronous gear (72), a ratchet (73), the outer edge of the ratchet (73) meshing with the outer edge of the ratchet wheel (71), an adjusting gear (74) being arranged at the bottom of the ratchet (73), a torsion spring (75) being fixedly installed between the adjusting gear (74) and the bottom of the inner wall of the device slot (12), an adjusting tooth block (76) being slidably connected at equal intervals on the circumference of the bottom of the inner wall of the device slot (12), the outer edge of the adjusting tooth block (76) meshing with the outer edge of the corresponding adjusting gear (74).

2. A sand mixer discharging control device according to claim 1, characterized in that: A retention opening (11) is provided between the first material guiding pipe (10) and the second material guiding pipe (30), and the four groups of retention plates (51) slide in the inner wall of the retention opening (11).

3. A sand mixer discharging control device according to claim 2, characterized in that: Guide grooves (13) are formed at equal intervals on the circumference of the top of the interception device box (1); a connecting rod (77) is fixedly installed on the top of the adjusting tooth block (76); the connecting rod (77) movably passes through the guide groove (13) and extends to the top of the interception device box (1); a swivel (78) is fixedly connected to the top of the connecting rod (77).

4. A sand mixer discharging control device according to claim 3, characterized in that: The compression air bag (221) is fixedly installed on the inner wall of the gate plate (23) on the side close to the first hand wheel (21); an air hole (222) is opened through the bottom of the gate plate (23); a screw on one side of the second hand wheel (22) movably penetrates into the inner cavity of the gate plate (23); and an end of the screw away from the second hand wheel (22) is rotationally connected to a side of the compression air bag (221) away from the first hand wheel (21).

5. A sand mixer discharging control device according to claim 4, characterized in that: A shunt pipe (224) is fixedly installed at the top circumference of the interception device box (1), the air guide pipe (223) is connected to the shunt pipe (224), and the shunt pipe (224) is connected to the inner cavity of the gas injection cylinder (6) through a connecting pipe.

6. A sand mixer discharging control device according to claim 5, characterized in that: A sand flowing pipe (3) is integrally formed at the top of the second material guide pipe (30), a material conveying blade (4) is arranged inside the sand flowing pipe (3), and a sealing ring (231) is fixedly installed at the top edge of the gate plate (23).

7. A sand mixer discharging control device according to claim 6, characterized in that: A mounting block (62) is fixedly installed between the gas injection cylinder (6) and the inner wall of the device groove (12), and first sliding grooves (53) are evenly spaced on the circumference of the inner wall of the device groove (12), and the rack (52) slides in the corresponding inner wall of the first sliding groove (53).

8. A sand mixer discharging control device according to claim 7, characterized in that: Second sliding grooves (761) are provided at equal intervals on the circumference of the inner wall of the device groove (12), and the adjusting tooth block (76) slides in the inner wall of the second sliding groove (761).

9. A sand mixer discharging control device according to claim 8, characterized in that: Each set of the ratchet wheels (71) and the synchronous gear (72) arranged at the bottom are rotatably mounted on the bottom of the inner wall of the device slot (12) via a rotating shaft, and each set of the ratchet pawls (73) and the adjusting gear (74) arranged at the bottom are rotatably mounted on the bottom of the inner wall of the device slot (12) via a rotating shaft.

10. A sand mixer discharging control device according to claim 9, characterized in that: The outer edge of the synchronous gear (72) is meshed with the outer edge of the corresponding rack (52), and the outer edge of the adjusting tooth block (76) is meshed with the outer edge of the corresponding adjusting gear (74).

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