Mixing equipment for prestressed concrete pipe pile production

Abstract

The invention relates to the technical field of concrete mixing, in particular to a prestressed concrete pipe pile production mixing device which comprises a stirring box, a feeding plate used for feeding is arranged at the top of the stirring box, and flow guide openings used for guiding out large sand and stones are formed in the two sides of the stirring box. A stirring structure used for stirring concrete to different degrees is arranged in the stirring box, a filtering structure used for intermittently discharging sand and stones is further arranged in the stirring box, a shaking structure used for improving filtering is arranged at the bottom of the filtering structure, and stirring blades are in a V shape through rotation of the stirring structure; sand and stones filtered by the filtering structure are pretreated and mixed, the situation that the stirring structure rotates at a high speed to break the sand and stones can be prevented, then the filtering structure is driven to be parallel and make contact with the shaking structure to shake and filter the sand and stones, and the stirring structure is driven to shake premixed concrete; the filtering effect of the filtering structure is improved while the surface of the filtering structure is prevented from being blocked due to excessive gravel.

Description

Technical Field

[0001] The invention relates to the technical field of concrete mixing, in particular to a mixing device for producing prestressed concrete pipe piles. Background Art

[0002] Concrete is a material often used in construction. Concrete is a material formed by mixing cement and sand and gravel. Mixing sand and gravel of different sizes with cement will produce different grades of concrete to meet different needs. In the prior art, most of the mixing of concrete is done by stirring. Although the prior art can mix concrete, the prior stirring method is too simple. For example, Patent No. (CN111097687A) discloses a graded concrete mixing device. The invention discloses a graded concrete mixing device, including a machine body, a screening chamber is provided at the upper end of the machine body, two identical mixing chambers are provided at the lower end of the machine body, a screening mechanism for screening sand and stone according to volume is provided in the screening chamber, a driven shaft for controlling the mixing and feeding of sand and stone that cannot be graded is provided at the lower left end of the machine body, and a mixing mechanism for mixing sand and stone with cement is provided in the mixing chamber; However, before mixing concrete, sand and gravel need to be filtered, because concrete pipe piles require pipe piles of different densities and qualities. Therefore, sand and gravel need to be filtered to change pipe piles of different densities and qualities. However, during filtering, large pieces of sand and gravel will accumulate on the surface of the filter. If they are not discharged or cleaned for a long time, the subsequent filtering effect of the filter will be reduced, and the concrete raw materials will clump when they are exposed to water, and then clog the surface of the filter. If the large pieces of sand and gravel are discharged later, the agglomerated raw materials will also be discharged, resulting in a waste of resources. In addition, it is inconvenient to reserve production time for subsequent concrete mixing after screening the sand and gravel. If sand and gravel continue to flow into the concrete during the mixing process, the concrete mixing efficiency will be reduced while also reducing the production quality. In view of this, we propose a mixing equipment for the production of prestressed concrete pipe piles. Summary of the invention

[0003] The object of the present invention is to provide a mixing device for producing prestressed concrete pipe piles to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides a mixing device for producing prestressed concrete pipe piles, comprising a mixing box, a feeding plate for feeding is arranged on the top of the mixing box, diversion ports for diverting large sand and gravel are opened on both sides of the mixing box, a mixing structure for mixing concrete to different degrees is arranged inside the mixing box, a filtering structure for intermittent feeding of sand and gravel is also arranged inside the mixing box, and a shaking structure for improving filtering is arranged at the bottom of the filtering structure; The concrete is preliminarily mixed by rotating the stirring structure, and the shaking structure is driven to a parallel state to assist the filtering structure in receiving and filtering sand and gravel. When the stirring structure rotates the maximum distance, the filtering structure is driven to switch from a parallel state to an inverted "V" state to disperse the agglomerated raw materials and guide the unfiltered sand and gravel out of the mixing box for collection.

[0005] Preferably, a control panel is provided on the outer ring surface of the mixing box, a feed plate arranged on the top of the mixing box has an external motor, and the control panel is used to control the rotation speed of the external motor, two groups of feed ports are also symmetrically arranged on the surface of the feed plate, and a discharge pipe is arranged at the bottom of the mixing box and is controlled by the control panel.

[0006] Preferably, the stirring structure includes a rotating shaft, which is fixedly connected to the output shaft end of the external motor, the outer ring surface of the rotating shaft is fixedly connected to a micro motor, the output end of the micro motor is fixedly connected to a pin shaft, the outer ring surface of the rotating shaft is fixedly connected to a limit plate, the two side surfaces of the limit plate are rotatably connected to the pin shaft, and the outer ring surface of the pin shaft is fixedly connected to a stirring blade for stirring and mixing.

[0007] Preferably, the filtering structure includes a cylindrical rod, the bottom of which is hingedly connected to the stirring blade, the top of which is hingedly connected to a sliding column, the outer ring surface of the sliding column is slidably connected to a limiting column, the limiting column is slidably connected to the inner wall of the mixing box through a fixed plate, the outer ring surface of the limiting column is rotatably connected to a limiting shaft, the outer ring surface of the limiting shaft is rotatably connected to a second filter plate, the second filter plate is slidably connected to the inside of the first filter plate, the side of the first filter plate away from the limiting shaft is movably connected to the inner wall of the mixing box, and a plurality of groups of filter ports are respectively provided on the surfaces of the first filter plate and the second filter plate.

[0008] Preferably, the shaking structure includes a first wedge block and a second wedge block, the first wedge block is fixedly connected to the bottom of the first filter plate, the second wedge block is fixedly connected to the outer annular surface of the sliding column, and the first wedge block and the second wedge block are arranged with inclined surfaces and are adapted to each other.

[0009] Preferably, the first filter plate and the second filter plate have several groups of filter openings on their surfaces, and the second filter plate and the first filter plate are symmetrically arranged in two groups along the center of the limiting axis. The first filter plate and the second filter plate are arranged in an arc shape and fit tightly to the inner wall of the mixing box, and the limiting column rotatably connected to one end of the limiting axis is fitted to the rotating axis, and the sliding column slidably connected inside the limiting column is splined to the rotating axis.

[0010] Preferably, the limiting plates, the pin shafts and the stirring blades are respectively arranged in four groups along the center of the rotating shaft, and the stirring blades are arranged as blade structures.

[0011] Preferably, the stirring blade fits against the inner wall of the stirring box when in a parallel state, the outer wall of the pin shaft to which the top of the stirring blade is fixedly connected is provided with an anti-corrosion layer, and the micro motor fixedly connected at one end of the pin shaft has a housing.

[0012] Preferably, four groups of cylindrical rods are respectively arranged along the stirring blades, and hinged balls are arranged at the top and bottom of the cylindrical rods. The sliding column hinged at the top of the cylindrical rods is in a sliding connection inside the limiting column.

[0013] Preferably, several groups of the first wedge blocks are respectively arranged along the center of the sliding column, and two groups of second wedge blocks are arranged on the outer annular surface of the sliding column.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the mixing equipment for producing prestressed concrete pipe piles, when the stirring structure is rotated to make the stirring blades into a "V" shape, the sand and gravel filtered out by the filtering structure are pre-treated and mixed, thereby improving the subsequent high-speed rotation mixing effect, and preventing the stirring structure from rotating at high speed and crushing the sand and gravel, and then driving the filtering structure to be parallel and contact with the shaking structure to make the sand and gravel shake and filter, and driving the stirring structure to shake the pre-mixed concrete, thereby preventing the surface of the filtering structure from receiving too much sand and gravel and causing blockage, and at the same time improving the filtering effect of the filtering structure.

[0015] 2. In the mixing equipment for producing prestressed concrete pipe piles, while driving the filtering structure 500 to switch from a "V" shape to an inverted "V" shape, the agglomerated raw materials received on the top of the filtering structure 500 can also be shaken to disperse the raw materials, thereby preventing the raw materials from being discharged along with large pieces of sand and gravel, causing a waste of resources.

[0016] 3. In the mixing equipment for the production of prestressed concrete pipe piles, when the stirring structure rotates the maximum distance, the stirring blades will be parallelized to increase the mixing efficiency. At the same time, the filtering structure will be driven into an inverted "V" shape, and the filter port channel will be closed to discharge the material, so that the concrete has sufficient time to mix. At the same time, the sand and gravel that are not filtered out by the first filter plate will be diverted from the diversion port to the outside of the mixing box for collection. The stirring structure has three different states, thereby producing different stirring effects, thereby improving the concrete mixing effect. When the stirring blades are not in use, they will be directed toward the bottom of the mixing box to divert the concrete sticky on the surface to the bottom of the mixing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall assembly of the present invention; Figure 2 It is a partial structural cutaway perspective view of the present invention; Figure 3 It is a schematic diagram of the overall structure of the present invention; Figure 4 This is a bottom-up stereoscopic view of the filtering structure of the present invention; Figure 5 It is a partial schematic diagram of the stirring structure of the present invention; Figure 6 This is a schematic diagram of the split structure of the first filter plate and the second filter plate of the present invention; Figure 7 It is a two-dimensional schematic diagram of the overall structure of the present invention in a non-moving state; Figure 8 It is a schematic diagram of the overall structure of the present invention in a moving state; Fig. 9 It is a two-dimensional schematic diagram of the motion state of the overall structure of the present invention; Fig.10 It is a schematic diagram of the final motion state of the overall structure of the present invention; Fig.11 It is a two-dimensional schematic diagram of the final motion state of the overall structure of the present invention.

[0018] The meaning of each number in the figure is: 1. Mixing box; 2. Feed plate; 3. Guide port; 400. Mixing structure; 401. Rotating shaft; 402. Micro motor; 403. Limiting plate; 404. Pin; 405. Mixing blade; 500. Filtering structure; 501. Cylindrical rod; 502. Sliding column; 503. Limiting column; 504. First filter plate; 505. Second filter plate; 506. Limiting shaft; 507. Filter port; 600. Shaking structure; 601. First wedge block; 602. Second wedge block. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] For the embodiments of the present invention, please refer to Figures 1 to 11 As shown, a mixing device for producing prestressed concrete pipe piles comprises a mixing box 1, a feeding plate 2 for feeding is arranged on the top of the mixing box 1, diversion ports 3 for diverting large sand and gravel are opened on both sides of the mixing box 1, a mixing structure 400 for mixing concrete to different degrees is arranged inside the mixing box 1, a filtering structure 500 for intermittent feeding of sand and gravel is also arranged inside the mixing box 1, and a shaking structure 600 for improving filtering is arranged at the bottom of the filtering structure 500; The concrete is preliminarily mixed by rotating the stirring structure 400, and the auxiliary shaking structure 600 is driven to be in a parallel state to the filtering structure 500 to receive and filter the sand and gravel. When the stirring structure 400 rotates the maximum distance, the filtering structure 500 is driven to switch from the parallel state to an inverted "V" state to disperse the agglomerated raw materials and guide the unfiltered sand and gravel to the outside of the mixing box 1 for collection.

[0021] The present invention takes into account that sand and gravel need to be filtered before the existing mixing of concrete, because concrete pipe piles require pipe piles of different densities and qualities. Therefore, it is necessary to filter sand and gravel to change the pipe piles of different densities and qualities. However, during the filtering, large pieces of sand and gravel will accumulate on the surface of the filter screen. If they are not discharged or cleaned for a long time, the filtering effect of the subsequent filter screen will be reduced. Therefore, when the stirring structure 400 rotates to make the stirring blade 405 in a "V" shape, the sand and gravel filtered out by the filtering structure 500 can be pre-treated and mixed, thereby improving the subsequent high-speed rotation mixing effect and preventing the stirring structure 400 from rotating at high speed and crushing the sand and gravel. Then, the filtering structure 500 is driven to be parallel and contact with the shaking structure 600 to shake and filter the sand and gravel, and the stirring structure 400 is driven to shake the pre-mixed concrete to prevent the surface of the filtering structure 500 from receiving too much sand and gravel and causing blockage, while improving the filtering effect of the filtering structure 500. Furthermore, if no production time is reserved for subsequent mixing of concrete after the sand and gravel are screened, sand and gravel will be continuously added to the concrete during the mixing process, which will reduce the concrete mixing efficiency and the production quality. Therefore, when the mixing structure 400 rotates the maximum distance, the mixing blades 405 will be parallel to increase the mixing efficiency. At the same time, the filtering structure 500 will be driven to form an inverted "V" shape and the filter port 507 will be closed to discharge the material, so that the mixing blades 405 have enough mixing time. At the same time, the sand and gravel that are not filtered out by the first filter plate 504 will be diverted from the diversion port 3 to the outside of the mixing box 1 for collection. When the mixing structure 400 has three different states, different mixing effects will be produced, thereby improving the concrete mixing effect. At the same time, considering that concrete raw materials will clump when exposed to water, and then get clogged on the surface of the filter structure 500, if large pieces of sand and gravel are subsequently discharged, the agglomerated raw materials will also be discharged, thereby causing a waste of resources. Therefore, by driving the filter structure 500 to switch from a "V" shape to an inverted "V" shape, the agglomerated raw materials on the top of the filter structure 500 can also be shaken to disperse the raw materials, thereby preventing the raw materials from being discharged along with the large pieces of sand and gravel, causing a waste of resources.

[0022] In order to ensure the subsequent stirring and filtering of the stirring structure 400 and the filtering structure 500, the following specific structures need to be disclosed in detail, please refer to Figure 1 The feed plate 2 arranged on the top of the mixing box 1 has an external motor, and the control panel is used to control the rotation speed of the external motor. Two groups of feed ports are symmetrically arranged on the surface of the feed plate 2; First of all, it is explained that a frequency converter is arranged inside the external motor. Since there is a microprocessor inside the frequency converter, the output frequency can be adjusted according to the input signal of the control panel, thereby changing the speed of the motor. Then, the concrete materials, cement and sand and gravel are put into the surface of the filter structure 500 from the feed port arranged on the top of the feed plate 2, and then the speed of the external motor is controlled to be slower through the control panel, so as to more conveniently drive the subsequent operation of the mixing structure 400 and filter the sand and gravel received on the surface of the filter structure 500. Then the stirring structure 400 rotates slowly to prevent the sand and stone from being crushed by too fast a rotation speed. The following specific structure needs to be disclosed in detail. Please refer to Figures 2 to 5 The stirring structure 400 includes a rotating shaft 401, which is fixedly connected to the output shaft end of the external motor, a micro motor 402 is fixedly connected to the outer ring surface of the rotating shaft 401, and a pin 404 is fixedly connected to the output end of the micro motor 402. The outer ring surface of the rotating shaft 401 is fixedly connected to a limit plate 403, and the side surfaces of the two limit plates 403 are rotatably connected to the pin 404. The outer ring surface of the pin 404 is fixedly connected to a stirring blade 405 for stirring and mixing; The control panel controls the external motor to rotate slowly, and the control panel can also control the output end of the micro motor 402 to start rotating. The rotational force of the output end of the micro motor 402 is sufficient to drive the pin 404 to rotate. The resistance encountered by the subsequent concrete mixing can make the stirring blade 405 move synchronously. In order to better discharge the concrete, the following specific structure needs to be disclosed in detail, please refer to Figures 2 to 6 The limiting plate 403, the pin shaft 404 and the stirring blade 405 are respectively provided with four groups along the center of the rotating shaft 401. The stirring blade 405 is provided with a blade structure. Similarly, the micro motor 402 is also provided with four groups ( Figure 3 Only one micro motor 402 is shown, which is easy to associate with by those skilled in the art and will not be described in detail here), and the output shafts of the four micro motors 402 are respectively connected to the four pin shafts 404; Therefore, the output shaft ends of the four micro-motors 402 rotate synchronously, driving the four pins 404 to rotate synchronously on the sides of the two limit plates 403, and then driving the stirring blades 405 to swing around the center of the pins 404 and form a "V" shape (for specific conditions, please refer to Figure 8 and Fig. 9), and the control panel controls the external motor to rotate at a slower speed. Therefore, the stirring blade 405 can also pre-mix the cement and sand, thereby improving the subsequent mixing effect. On the contrary, when the stirring structure 400 is not used, the output shaft end of the micro motor 402 is controlled by the control panel to rotate in the opposite direction, and drives the pin shaft 404 to rotate in the opposite direction, and then drives the bottom of the stirring blade 405 toward the bottom of the mixing box 1, thereby preventing the concrete sticking to the surface of the stirring blade 405 from flowing to the bottom of the mixing box 1, and preventing the concrete sticking to the surface of the stirring blade 405 from being stationary for a long time and solidifying, affecting the subsequent concrete mixing effect.

[0023] In order to filter the sand and gravel received on the surface of the filter structure 500, the following specific structure needs to be disclosed in detail, please refer to Figure 2-Figure 6 The filtering structure 500 includes a cylindrical rod 501, the bottom of the cylindrical rod 501 is hinged to the stirring blade 405, the top of the cylindrical rod 501 is hingedly connected to a sliding column 502, the outer ring surface of the sliding column 502 is slidably connected to the limiting column 503, the limiting column 503 is slidably connected to the inner wall of the mixing box 1 through a fixed plate, the outer ring surface of the limiting column 503 is rotatably connected to the limiting shaft 506, the outer ring surface of the limiting shaft 506 is rotatably connected to the second filter plate 505, the second filter plate 505 is slidably connected to the inside of the first filter plate 504, the side of the first filter plate 504 away from the limiting shaft 506 is movably connected to the inner wall of the mixing box 1, and a plurality of groups of filter ports 507 are respectively provided on the surfaces of the first filter plate 504 and the second filter plate 505; Next, when the stirring blade 405 swings in a "V" shape around the center of the pin shaft 404, the cylindrical rod 501 is driven to move toward the feeding plate 2, and the sliding column 502 is driven to slide inside the limiting column 503. After sliding for a certain distance, it will move synchronously against the limiting column 503, and then the limiting shaft 506 is driven to move, and the second filter plate 505 will rotate around the limiting shaft 506, so that the second filter plate 505 slides inside the first filter plate 504. When the sliding column 502 and the limiting column 503 move a certain distance, the second filter plate 505 is driven to move a certain distance, and this distance makes the second filter plate 505 slide the maximum distance inside the first filter plate 504, so that the two groups of second filter plates 505 and the first filter plate 504 are parallel, and the filter ports 507 opened on the two groups of surfaces are connected, so as to filter the sand and gravel received on the surface of the first filter plate 504, and at the same time facilitate the subsequent shaking structure 600 to shake and increase the filtering effect; In order to make the first filter plate 504 and the second filter plate 505 cooperate to further improve the filtering effect of sand and stone filtering, it is necessary to disclose the following specific structure in detail, please refer to Figures 2 to 9The shaking structure 600 includes a first wedge block 601 and a second wedge block 602. The first wedge block 601 is fixedly connected to the bottom of the first filter plate 504, and the second wedge block 602 is fixedly connected to the outer annular surface of the sliding column 502. The first wedge block 601 and the second wedge block 602 are inclined and adapted to each other. Next, combine Figure 8 and Fig. 9 When the rotating shaft 401 rotates slowly, the stirring structure 400 as a whole will be driven to rotate slowly, and then the sliding column 502 connected by the spline will be driven to rotate slowly through the rotating shaft 401, and the second wedge block 602 will be driven to rotate around the center of the sliding column 502. At this time, the first filter plate 504 and the second filter plate 505 are in a parallel state. Therefore, when the first filter plate 504 is in a parallel state, the first wedge block 601 and the second wedge block 602 will be driven to be on the same horizontal line. Therefore, when the second wedge block 602 rotates around the center of the sliding column 502, it will contact the first wedge block 601, so that the first filter plate 504 and the second filter plate 505 will shake up and down, improving the effect of the first filter plate 504. At the same time, because the sliding column 502 will also shake, the stirring blade 405 hinged by the cylindrical rod 501 will also shake, so that the stirring angle can be continuously changed, thereby improving the mixing effect; In order to guide and collect the sand and gravel that are not filtered out on the surface of the first filter plate 504, it is necessary to disclose the following specific structure in detail. There are several groups of filter ports 507 opened on the surfaces of the first filter plate 504 and the second filter plate 505. The second filter plate 505 and the first filter plate 504 are symmetrically arranged in two groups along the center of the limiting axis 506. The first filter plate 504 and the second filter plate 505 are arranged in an arc shape and fit tightly to the inner wall of the mixing box 1. The limiting column 503 rotatably connected to one end of the limiting axis 506 is fitted to the rotating axis 401. The sliding column 502 slidably connected inside the limiting column 503 is splined to the rotating axis 401. When the concrete material needs to be thoroughly mixed, the micro motor 402 will drive the pin 404 to continue to rotate so that the stirring blades 405 are in a "V" shape and become parallel. Therefore, the concrete mixed at the bottom of the mixing box 1 can be thoroughly mixed, so that there are two different degrees of stirring to improve the mixing effect. When the stirring blades 405 are in a parallel state, the cylindrical rod 501 will be driven to a vertical state (please refer to the details). Fig.10 and Fig.11 ), and then the sliding column 502 continues to move against the limiting column 503 toward the feed plate 2, and then the limiting shaft 506 moves, and the second filter plate 505 rotates around the limiting shaft 506, so that the second filter plate 505 slides inside the first filter plate 504, so that the first filter plate 504 and the second filter plate 505 are in a Fig.10As shown, when the second filter plate 505 slides the maximum distance on the first filter plate 504, the second filter plate 505 will not communicate with the filter port 507 opened on the surface of the first filter plate 504, and the two groups of second filter plates 505 and the first filter plate 504 will be in an inverted "V" shape, so that the surface of the first filter plate 504 will bear large sand and gravel, which will roll down from the surface of the first filter plate 504, and finally fall from the guide port 3 to the collection box placed in advance outside the mixing box 1, so that the mixing structure 400 can mix the concrete inside the mixing box 1, and at the same time, the channel of the first filter plate 504 can be closed, providing the mixing structure 400 with enough time to mix the concrete, and can also guide the unfiltered sand and gravel to the outside of the mixing box 1 for collection. After the mixing is completed, the discharge pipe is controlled to open through the control panel, so that the mixed concrete is discharged from the discharge pipe to a designated location; In order to better mix the concrete, the following specific structure needs to be disclosed in detail, please refer to Figures 2 to 6 When the stirring blade 405 is in a parallel state, it fits with the inner wall of the mixing box 1. The outer wall of the pin 404 fixedly connected to the top of the stirring blade 405 is provided with an anti-corrosion layer. The micro motor 402 fixedly connected to one end of the pin 404 has a shell, thereby preventing the corrosive concrete from rusting or damaging the pin 404. When the micro motor 402 is in operation, the shell on the surface does not affect the use of the micro motor 402. In order to better ensure that the rotation of the sliding column 502 is not affected, the following specific structure needs to be disclosed in detail, please refer to Figures 2 to 6 , four groups of cylindrical rods 501 are respectively arranged along the arrangement of the stirring blades 405, and hinge balls are arranged at the top and bottom of the cylindrical rods 501. The sliding column 502 hinged at the top of the cylindrical rod 501 is slidably connected inside the limiting column 503, so when the sliding column 502 slides, it does not affect the rotation of the sliding column 502 inside the limiting column 503, and the limiting column 503 is slidably connected to the inside of the stirring box 1 by a fixed plate, and is still placed in a non-rotating state, so it does not drive the first filter plate 504 and the second filter plate 505 to rotate; In order to better realize the shaking of the first filter plate 504, the following specific structure needs to be disclosed in detail, please refer to Figures 2 to 6 Several groups of first wedge blocks 601 are respectively arranged along the center of the sliding column 502, and two groups of second wedge blocks 602 are arranged on the outer ring surface of the sliding column 502. When the second wedge blocks 602 rotate, they will continuously contact with the first wedge blocks 601, causing the first filter plate 504 fixedly connected to the side of the first wedge blocks 601 to vibrate, thereby improving the filtering effect.

[0024] Working principle: First of all, a variable frequency speed controller is arranged inside the external motor. Since there is a microprocessor inside the frequency converter, the output frequency can be adjusted according to the input signal of the control panel, thereby changing the speed of the motor. Then, the concrete materials, cement and sand and gravel are put into the surface of the filter structure 500 from the feed port arranged on the top of the feed plate 2, and then the speed of the external motor is controlled to be slower through the control panel, so as to more conveniently drive the subsequent operation of the mixing structure 400 and filter the sand and gravel received on the surface of the filter structure 500. The rotation of the output shaft end of the micro motor 402 drives the pin 404 to rotate on the sides of the two limit plates 403, and then drives the stirring blade 405 to swing around the center of the pin 404 and form a "V" shape (for specific status, please refer to Figure 8 and Fig. 9 ), and the control panel controls the external motor to rotate at a slower speed, so the stirring blade 405 can also pre-treat the cement and sand and gravel, thereby improving the subsequent mixing effect; Next, when the stirring blade 405 swings in a "V" shape around the center of the pin shaft 404, the cylindrical rod 501 is driven to move toward the feeding plate 2, and the sliding column 502 is driven to slide inside the limiting column 503. After sliding for a distance, it moves synchronously against the limiting column 503, and then drives the limiting shaft 506 to move, and the second filter plate 505 rotates around the limiting shaft 506, so that the second filter plate 505 slides inside the first filter plate 504. At this time, the stirring blade 405 swings to the "V" shape. The sliding column 502 and the limiting column 503 are in a V-shaped shape. Therefore, when the sliding column 502 and the limiting column 503 move a certain distance, the second filter plate 505 will be driven to move a certain distance, and this distance will make the second filter plate 505 slide the maximum distance inside the first filter plate 504, so that the two groups of second filter plates 505 and the first filter plate 504 are parallel to each other, and the filter ports 507 opened on the two groups of surfaces are connected, so as to filter the sand and gravel received on the surface of the first filter plate 504, and facilitate the subsequent shaking of the shaking structure 600 to increase the filtering effect; Next, combine Figure 8 and Fig. 9When the rotating shaft 401 rotates slowly, the stirring structure 400 as a whole will be driven to rotate slowly, and then the sliding column 502 connected by the spline will be driven to rotate slowly through the rotating shaft 401, and the second wedge block 602 will be driven to rotate around the center of the sliding column 502. At this time, the first filter plate 504 and the second filter plate 505 are in a parallel state. Therefore, when the first filter plate 504 is in a parallel state, the first wedge block 601 and the second wedge block 602 will be driven to be on the same horizontal line. Therefore, when the second wedge block 602 rotates around the center of the sliding column 502, it will contact the first wedge block 601, so that the first filter plate 504 and the second filter plate 505 will shake up and down, improving the effect of the first filter plate 504. At the same time, because the sliding column 502 will also shake, the stirring blade 405 hinged by the cylindrical rod 501 will also shake, so that the stirring angle can be continuously changed, thereby improving the mixing effect; When the concrete material needs to be thoroughly mixed, the micro motor 402 will drive the pin 404 to continue to rotate so that the stirring blades 405 are in a "V" shape and become parallel. Therefore, the concrete mixed at the bottom of the mixing box 1 can be thoroughly mixed, so that there are two different degrees of stirring to improve the mixing effect. When the stirring blades 405 are in a parallel state, the cylindrical rod 501 will be driven to a vertical state (please refer to the details). Fig.10 and Fig.11 ), and then the sliding column 502 continues to move against the limiting column 503 toward the feed plate 2, and then the limiting shaft 506 moves, and the second filter plate 505 rotates around the limiting shaft 506, so that the second filter plate 505 slides inside the first filter plate 504, so that the first filter plate 504 and the second filter plate 505 are in a Fig.10 As shown, when the second filter plate 505 slides the maximum distance on the first filter plate 504, the second filter plate 505 will not communicate with the filter port 507 opened on the surface of the first filter plate 504, and the two groups of second filter plates 505 and the first filter plate 504 will be in an inverted "V" shape, so that the surface of the first filter plate 504 will bear large sand and gravel, which will roll down from the surface of the first filter plate 504, and finally fall from the guide port 3 to the collection box placed in advance outside the mixing box 1, so that the mixing structure 400 can mix the concrete inside the mixing box 1, and at the same time, the channel of the first filter plate 504 can be closed, providing the mixing structure 400 with enough time to mix the concrete, and can also guide the unfiltered sand and gravel to the outside of the mixing box 1 for collection. After the mixing is completed, the discharge pipe is controlled to open through the control panel, so that the mixed concrete is discharged from the discharge pipe to a designated location; When the stirring structure 400 is not in use, the output shaft end of the micro motor 402 is controlled by the control panel to rotate in the opposite direction, and drives the pin shaft 404 to rotate in the opposite direction, and then drives the bottom of the stirring blade 405 toward the bottom of the mixing box 1, thereby preventing the concrete sticking to the surface of the stirring blade 405 from flowing to the bottom of the mixing box 1, and preventing the concrete sticking to the surface of the stirring blade 405 from being stationary for a long time and solidifying, thereby affecting the subsequent concrete mixing effect.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A mixing device for producing prestressed concrete pipe piles, comprising a mixing box (1), characterized in that: The top of the mixing box (1) is provided with a feeding plate (2) for feeding materials, both sides of the mixing box (1) are provided with diversion ports (3) for diverting large sand and gravel, the mixing box (1) is provided with a stirring structure (400) for stirring concrete to different degrees, the mixing box (1) is also provided with a filtering structure (500) for intermittently feeding sand and gravel, and the bottom of the filtering structure (500) is provided with a shaking structure (600) for improving filtering; The concrete is initially mixed by rotating the stirring structure (400), and the shaking structure (600) is driven to be in a parallel state to assist the filtering structure (500) in receiving and filtering sand and gravel. When the stirring structure (400) rotates to a maximum distance, the filtering structure (500) is driven to switch from a parallel state to an inverted "V" state to disperse the agglomerated raw materials and guide the unfiltered sand and gravel out of the stirring box (1) for collection outside. The filtering structure (500) comprises a cylindrical rod (501), the bottom of the cylindrical rod (501) is hingedly connected to the stirring blade (405), the top of the cylindrical rod (501) is hingedly connected to a sliding column (502), the outer ring surface of the sliding column (502) is slidably connected to a limiting column (503), the limiting column (503) is slidably connected to the inner wall of the stirring box (1) through a fixed plate, the outer ring surface of the limiting column (503) is rotatably connected to a limiting shaft (506), the outer ring surface of the limiting shaft (506) is rotatably connected to a second filter plate (505), the second filter plate (505) is slidably connected to the inside of a first filter plate (504), the side of the first filter plate (504) away from the limiting shaft (506) is movably connected to the inner wall of the stirring box (1), and a plurality of groups of filter ports (507) are respectively provided on the surface of the first filter plate (504) and the second filter plate (505).

2. The mixing equipment for producing prestressed concrete pipe piles according to claim 1, characterized in that: The feed plate (2) arranged on the top of the mixing box (1) has an external motor, and the control panel is used to control the rotation speed of the external motor. Two groups of feed ports are also symmetrically arranged on the surface of the feed plate (2).

3. The mixing equipment for producing prestressed concrete pipe piles according to claim 1, characterized in that: The stirring structure (400) comprises a rotating shaft (401), the rotating shaft (401) being fixedly connected to the output shaft end of an external motor, the outer ring surface of the rotating shaft (401) being fixedly connected to a micro motor (402), the output end of the micro motor (402) being fixedly connected to a pin shaft (404), the outer ring surface of the rotating shaft (401) being fixedly connected to a limit plate (403), the side surfaces of the two limit plates (403) being rotatably connected to the pin shaft (404), and the outer ring surface of the pin shaft (404) being fixedly connected to a stirring blade (405) for stirring and mixing.

4. The mixing equipment for producing prestressed concrete pipe piles according to claim 3, characterized in that: The shaking structure (600) comprises a first wedge block (601) and a second wedge block (602), wherein the first wedge block (601) is fixedly connected to the bottom of the first filter plate (504), and the second wedge block (602) is fixedly connected to the outer annular surface of the sliding column (502), and the first wedge block (601) and the second wedge block (602) are arranged with inclined surfaces and are adapted to each other.

5. The mixing equipment for producing prestressed concrete pipe piles according to claim 4, characterized in that: The first filter plate (504) and the second filter plate (505) have a plurality of groups of filter ports (507) provided on their surfaces. The second filter plate (505) and the first filter plate (504) are symmetrically arranged in two groups along the center of the limiting axis (506). The first filter plate (504) and the second filter plate (505) are arranged in an arc shape and are tightly fitted to the inner wall of the mixing box (1). A limiting column (503) rotatably connected to one end of the limiting axis (506) is fitted to the rotating axis (401). A sliding column (502) slidably connected inside the limiting column (503) is spline-connected to the rotating axis (401).

6. The mixing equipment for producing prestressed concrete pipe piles according to claim 5, characterized in that: The limiting plates (403), the pin shafts (404) and the stirring blades (405) are respectively arranged in four groups along the center of the rotating shaft (401), and the stirring blades (405) are arranged as blade structures.

7. The mixing equipment for producing prestressed concrete pipe piles according to claim 6, characterized in that: The stirring blade (405) fits against the inner wall of the stirring box (1) when in a parallel state; the outer wall of the pin shaft (404) fixedly connected to the top of the stirring blade (405) is provided with an anti-corrosion layer; and the micro motor (402) fixedly connected to one end of the pin shaft (404) has a housing.

8. The mixing equipment for producing prestressed concrete pipe piles according to claim 4, characterized in that: Four groups of cylindrical rods (501) are respectively arranged along the stirring blades (405), and hinge balls are arranged at the top and bottom of the cylindrical rod (501). The sliding column (502) hinged at the top of the cylindrical rod (501) is slidably connected inside the limiting column (503).

9. The mixing equipment for producing prestressed concrete pipe piles according to claim 4, characterized in that: Several groups of the first wedge blocks (601) are respectively arranged along the center of the sliding column (502), and two groups of second wedge blocks (602) are arranged on the outer annular surface of the sliding column (502).

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