CN114582218A - Pouring teaching aid - Google Patents

Abstract

The invention discloses a pouring teaching aid, comprising a teaching aid shell, a mold and a moving seat. The teaching aid shell is provided with a cavity, the mold is arranged in the cavity, and the bottom of the side wall of the teaching aid shell is provided with a penetrating hole. a through hole, the movable seat is slidably connected in the through hole, a plurality of movement grooves are opened on the top of the movable seat, one side of the movement groove is an arc-shaped side, and the side opposite to the arc-shaped side is It is a vertical side, the bottom of the moving groove is an arc-shaped surface connecting the arc-shaped side and the vertical side, the bottom of the mold is fixedly connected with a support plate, and the bottom of the support plate is installed in the moving groove Inside, the bottom of the support plate is slidingly connected with the movement groove. In the process of teaching demonstration, the pouring teaching aids vibrate the pouring concrete evenly, which improves the teaching quality of pouring.

Description

A pouring teaching aid

technical field

The invention relates to the technical field of teaching aids for civil engineering, in particular to a teaching aid for pouring.

Background technique

At present, concrete pouring is the construction process of pouring the mixed concrete material into the warehouse, leveling the warehouse, and tamping and compacting. The pouring requires continuous, uniform and prevention of concrete segregation; warehouse leveling is to use manual or mechanical methods to evenly spread the entire poured warehouse surface and fill it with concrete; compaction is also called "vibration". There are two kinds of vibrating, and mechanical vibrating method is commonly used in hydraulic engineering.

In the course of pouring, the civil engineering major needs to use teaching aids to demonstrate, and the existing teaching aids for pouring devices do not vibrate the concrete evenly during pouring, which affects the quality of pouring teaching.

To sum up, how to effectively solve the problem that the existing teaching aids of the pouring device do not vibrate the concrete evenly during pouring, thereby affecting the teaching quality of pouring, is an urgent problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a pouring teaching aid, which in the teaching demonstration process, the pouring concrete is vibrated evenly, and the pouring teaching quality is improved.

In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions:

A pouring teaching aid, comprising a teaching aid shell, a mold, and a moving seat, wherein the teaching aid shell is provided with a cavity, the mold is arranged in the cavity, and a through hole is provided at the bottom of the side wall of the teaching aid shell, so that the The movable seat is slidably connected in the through hole, a plurality of movement slots are opened on the top of the movable seat, one side of the movement slot is an arc edge, and the side opposite to the arc edge is a vertical edge, The bottom of the moving groove is an arc-shaped surface connecting the arc-shaped side and the vertical side, the bottom of the mold is fixedly connected with a support plate, the bottom of the support plate is installed in the moving groove, the The bottom of the support plate is in sliding connection with the movement groove.

Optionally, the outer wall of the mold is fixedly connected with a second rack, the inner wall of the cavity is fixedly connected with a third rack, and the second rack and the third rack are connected through a first gear transmission , the top of the cavity is provided with a plurality of positioning rings, and the same connecting rope is arranged in the plurality of positioning rings, the third rack and the top of the screed are connected by the connecting rope, and the screed is connected to the The moulds are all set horizontally, and the screed plate is located just above the mould;

The side wall of the screed plate can be closely fitted with the inner wall of the mold.

Optionally, a motor is provided at the bottom of the outer side wall of the teaching aid housing, the output end of the motor penetrates the side wall of the teaching aid housing, the side wall of the motor is perpendicular to the side wall of the through hole, the The output end of the motor is coaxially and fixedly connected with the rotating rod, and the rotating rod is coaxially and fixedly connected with the third gear,

The moving base includes a fixed bottom plate, a plurality of support rods and a fixed top plate, the top of the fixed bottom plate and the bottom of the fixed top plate are fixedly connected through a plurality of the support rods, and the top of the fixed bottom plate is fixedly provided with a first a rack, the first rack is meshed with a second gear, the second gear is meshed with the third gear, and both the second gear and the third gear are arranged in the cavity;

A plurality of the support rods are respectively fixedly connected to the top four corners of the fixed bottom plate.

Optionally, the fixed top plate is provided with sliding grooves on the opposite side walls, and a plurality of sliding plates are slidably connected in the sliding grooves, and the plurality of sliding plates are all provided with tooth grooves, and the tooth grooves are connected with each other. The third gear engages and drives.

Optionally, both ends of the top of the fixed top plate are provided with positioning plates.

Optionally, the sliding plate includes a fixing ring, a fixing frame, a plurality of support bars, a plurality of first rotating blocks and a plurality of second rotating blocks, and the fixing ring and the fixing frame are respectively arranged on the sliding plate. The two ends of the fixed frame can be inserted into the fixed ring,

A plurality of the support bars are rotatably connected by a plurality of the first rotating blocks and a plurality of the second rotating blocks, and the plurality of the first rotating blocks are distributed on one side and two ends of the support bars. The second rotating blocks are distributed on the other two ends of the same support bar.

Optionally, the second gear is coaxially and fixedly connected to the fixing rod, the outer side wall of the fixing rod is slidably connected with a first sliding ring and a second sliding ring, and the fixing rod penetrates the side wall of the teaching aid housing, The first sliding ring and the second sliding ring are respectively slidably connected with the two side walls of the teaching aid housing.

Optionally, the first sliding ring and the second sliding ring are connected by a spring, the spring is sleeved on the fixing rod, and the first sliding ring is fixedly connected with the side wall of the cavity, so The second slip ring is fixedly connected with the second gear, and the radius of the second gear has multiple dimensions,

The fixing rod is provided with a plurality of fixing holes, and the fixing rod is fixedly connected with the teaching aid housing through the positioning rod.

Optionally, the second gear includes a spur gear and a bevel gear, the spur gear meshes with the first rack for transmission, and the bevel gear meshes with the third gear for transmission.

Optionally, the inner wall of the cavity is provided with a plurality of guide grooves, the outer wall of the mold is provided with guide rails matched with the guide grooves, and the plurality of guide grooves are slidably connected to the mold.

The pouring teaching aid provided by the present invention includes a teaching aid shell, a mold, and a movable seat. The teaching aid shell is provided with a cavity. Optionally, the cross section of the teaching aid shell and the cavity are rectangular. The mold is arranged in the cavity, and optionally, the mold is arranged in the center on the left and right sides. The lateral position of the mold in the cavity is fixed and cannot be moved left and right.

A through hole is arranged at the bottom of one side wall of the teaching aid shell, the through hole is arranged laterally, the moving seat is connected in the through hole, the bottom surface of the moving seat is in contact with the bottom surface of the teaching aid shell, and the moving seat can be opposite along the through hole. Slide left and right on the teaching aid housing. It should be noted that the horizontal direction mentioned in this application refers to the direction in which the movable seat moves, the vertical direction refers to the direction perpendicular to the horizontal plane on the horizontal plane, and the vertical direction refers to the direction in which the mold moves up and down.

The top of the movable seat is provided with a plurality of movement grooves. Optionally, the shape and size of the movable grooves are the same, and the plurality of movement grooves are arranged in the transverse direction. One side of the motion slot is set as an arc edge, the other side is set as a vertical edge, the vertical edge is opposite to the arc edge, and the vertical edge and the arc edge are longitudinally set. The bottom of the motion slot is an arc surface, and the arc surface connects the arc edge and the vertical edge smoothly and transitionally.

The bottom surface of the mold and the top surface of the movable seat are connected by a support plate. The bottom of the mold is fixedly connected to the support plate. The bottom of the support plate is installed in the movement groove. The motion slot is a sliding connection. When the movable seat moves left and right in the through hole, the support plate moves across a plurality of movement grooves in sequence, and in the vertical direction, the mold follows the support plate to move up and down in the movable groove. Specifically, when the support plate falls from the vertical edge, it can drive the mold to move downward, and when the support plate rises through the arc edge, it drives the mold to move upward, and the up and down movement of the mold realizes the effect of vibration and compaction.

The pouring teaching aid provided by the invention can accurately demonstrate the concrete pouring process in the teaching process, the pouring teaching aid can make the poured concrete vibrate evenly, the pouring quality is high, the demonstration is more intuitive and concrete, the operation is simple, and the teaching quality is improved.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Fig. 1 is the structural representation of the pouring teaching aid provided by a kind of specific embodiment in the present invention;

Fig. 2 is the internal sectional view of Fig. 1;

Fig. 3 is the partial enlarged view of A place in Fig. 2;

Fig. 4 is another view of Fig. 1;

Figure 5 is a schematic structural diagram of a fixed rod;

6 is a schematic structural diagram of a sliding plate;

FIG. 7 is a partial enlarged view of B in FIG. 6 .

The figures are marked as follows:

1. Teaching aids shell, 2. Flat plate, 3. Mould, 4. Moving seat, 5. First rack, 6. Positioning plate, 7. Sliding plate, 8. Fixing ring, 9. Fixing frame, 10. Support bar, 11. Gear slot, 12. First rotating block , 13 second rotating block, 14 second rack, 15 first gear, 16 third rack, 17 connecting rope, 18 supporting plate, 19 guiding groove, 20 motor, 21 fixing rod, 22 fixing hole, 23 positioning ring , 24 first sliding ring, 25 spring, 26 second sliding ring, 27 second gear, 28 third gear, 29 rotating rod, 30 positioning ring, 31 movement groove.

Detailed ways

The core of the present invention is to provide a pouring teaching aid, which in the process of teaching demonstration, the pouring concrete is vibrated evenly, and the pouring teaching quality is improved.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIGS. 1 to 7. FIG. 1 is a schematic structural diagram of a pouring teaching aid provided by a specific embodiment of the present invention; FIG. 2 is an internal cross-sectional view of FIG. 1; FIG. 3 is a partial enlarged view of A in FIG. 2 Fig. 4 is another view of Fig. 1; Fig. 5 is a schematic view of the structure of the fixed rod; Fig. 6 is a schematic view of the structure of the sliding plate;

In a specific embodiment, the pouring teaching aid provided by the present invention includes a teaching aid housing 1, a mold 3, and a movable seat 4. The teaching aid housing 1 is provided with a cavity, the mold 3 is arranged in the cavity, and the side of the teaching aid housing 1 is provided with a cavity. The bottom of the wall is provided with a through hole, the movable seat 4 is slidably connected in the through hole, and the top of the movable seat 4 is provided with a plurality of movement slots 31, one side of the movement slot 31 is an arc edge, and the side opposite to the arc edge is Vertical side, the bottom of the moving groove 31 is an arc surface connecting the arc-shaped side and the vertical side, the bottom of the mold 3 is fixedly connected with the support plate 18, the bottom of the support plate 18 is installed in the moving groove 31, and the bottom of the support plate 18 is connected to the support plate 18. The movement slot 31 is a sliding connection.

In the above structure, the pouring teaching aid includes a teaching aid housing 1, a mold 3, and a movable seat 4. The teaching aid housing 1 is provided with a cavity. Optionally, the cross-section of the teaching aid housing 1 and the cavity are rectangular. The mold 3 is arranged in the cavity, and optionally, the mold 3 is centrally arranged on the left and right sides. The lateral position of the mold 3 in the cavity is fixed and cannot be moved left and right.

A through hole is provided at the bottom of one side wall of the teaching aid housing 1, and the through hole is arranged in the transverse direction. The movable seat 4 is connected in the through hole, and the bottom surface of the movable seat 4 is in contact with the bottom surface of the teaching aid shell 1. The through hole slides left and right relative to the teaching aid housing 1 . It should be noted that the horizontal direction mentioned in this application refers to the direction in which the movable seat 4 moves, the vertical direction refers to the direction perpendicular to the horizontal plane on the horizontal plane, and the vertical direction refers to the direction in which the mold 3 moves up and down.

The top of the moving base 4 is provided with a plurality of movement grooves 31 . Optionally, the shape and size of the movable grooves are the same, and the plurality of movement grooves 31 are arranged laterally. One side of the movement slot 31 is provided with an arc-shaped side, and the other side is provided with a vertical side. The bottom of the movement slot 31 is an arc surface, and the arc surface connects the arc edge and the vertical edge smoothly and transitionally.

The bottom surface of the mold 3 and the top surface of the moving base 4 are connected by the support plate 18 , the bottom of the mold 3 is fixedly connected with the support plate 18 , the bottom of the support plate 18 is installed in the movement groove 31 , and the bottom of the support plate 18 is located at the top of the moving base 4 In close contact, the bottom of the support plate 18 and the movement groove 31 are slidingly connected. When the moving base 4 moves left and right in the through hole, the support plate 18 moves across the plurality of moving grooves 31 in sequence. In the vertical direction, the mold 3 moves up and down in the moving groove following the support plate 18 . Specifically, when the support plate 18 falls from the vertical side, it can drive the mold 3 to move downward, and when the support plate 18 rises through the arc edge, it drives the mold 3 to move upward, and the up and down movement of the mold 3 realizes the effect of vibration and compaction.

The pouring teaching aid provided by the invention can accurately demonstrate the concrete pouring process in the teaching process, the pouring teaching aid can make the poured concrete vibrate evenly, the pouring quality is high, the demonstration is more intuitive and concrete, the operation is simple, and the teaching quality is improved.

On the basis of the above specific embodiment, a plurality of positioning rings 30 are arranged on the top of the cavity, and the same connecting rope 17 is arranged in the plurality of positioning rings 30. Optionally, the connecting rope 17 is a nylon rope, and the third rack 16 and the top of the screed 2 are connected by a connecting rope 17 , that is, the upper end of the connecting rope 17 is connected with the screed 2 , and the lower end is connected with the third rack 16 .

The plate 2 and the mold 3 are both set horizontally, the plate 2 is located directly above the mold 3, and the plate 2 can move up and down into the opening of the top surface of the mold 3.

Optionally, the side wall of the screed plate 2 can be closely attached to the inner wall of the mold 3, and when the scout plate 2 moves downward, it can accurately fall in the mold 3 to realize the leveling operation, which can be used for the concrete of the entire mold 3 cross-section. Leveling is done to reduce concrete flow bulges at the edges.

The outer wall of the mold 3 is fixedly connected with a second rack 14, the inner wall of the cavity is fixedly connected with a third rack 16, the second rack 14 and the third rack 16 are connected through the first gear 15, and the second rack 14 The third rack 16 meshes with the first gear 15 for transmission.

When the second rack 14 moves downward, it drives the first gear 15 to move counterclockwise, and the first gear 15 drives the third rack 16 to move upward. When the third rack 16 moves upward, the connecting rope 17 becomes loose and finds a flat plate. 2. The operation of leveling the concrete in the mold 3 by moving downward; when the second rack 14 moves upward, it drives the first gear 15 to move clockwise, and the first gear 15 drives the third rack 16 to move down. During the downward movement of the rack 16 , the connecting rope 17 is tightened and the flat plate 2 moves upward, and the continuous leveling operation is realized by the continuous up and down movement of the second rack 14 .

To sum up, the pouring teaching aid provided by the present invention can not only play the role of vibration and compaction, but also can realize continuous leveling operation.

Based on the above specific embodiments, the bottom of the outer side wall of the teaching aid housing 1 is provided with a motor 20 , the side wall has a through hole at the output end of the motor 20 , and the output end of the motor 20 penetrates the side wall of the teaching aid housing 1 . It should be noted that the side wall of the motor 20 is perpendicular to the side wall of the through hole.

The output end of the motor 20 is coaxially and fixedly connected with the rotating rod 29, and the rotating rod 29 is coaxially and fixedly connected with the third gear 28. The rotation of the motor 20 drives the rotating rod 29 to rotate, and the rotation of the rotating rod 29 drives the rotation of the third gear 28. turn.

The movable base 4 includes a fixed bottom plate, a plurality of support rods and a fixed top plate. The top of the fixed bottom plate and the bottom of the fixed top plate are fixedly connected by a plurality of support rods. The structure is simple, the connection is convenient, and the stability is good.

The second gear 27 and the third gear 28 are meshed and connected. The second gear 27 and the third gear 28 are both arranged in the cavity. The rotation of the third gear 28 drives the second gear 27 to rotate, and the third gear 28 and the second gear 28 rotate. The direction of rotation of the gear 27 is reversed.

The top of the fixed bottom plate is fixedly provided with a first rack 5 , which meshes with the second gear 27 for transmission, and drives the first rack 5 and the moving base 4 to move together through the rotation of the second gear 27 . When the second gear 27 moves counterclockwise, the movable base 4 moves to the right, and when the second gear 27 moves clockwise, the movable base 4 moves to the left, thereby controlling the lateral movement of the movable base 4, the structure is simple, and the movement is relatively stable.

On the basis of the above specific embodiments, the fixed top plate is provided with sliding grooves on the opposite side walls, the sliding grooves are arranged in the lateral direction, and a plurality of sliding plates 7 are slidably connected in the sliding grooves, that is, the sliding plates 7 can slide in the sliding groove. Sliding in the slot; the chute has the function of limiting and guiding the sliding plate 7 to ensure that the sliding plate 7 slides in the chute all the time.

The plurality of sliding plates 7 are provided with tooth slots 11, and the tooth slots 11 are engaged with the third gear 28 for transmission, so that the movement of the sliding plates 7 can be driven by the meshing movement of the third gear 28 and the tooth slots 11, and the movement of the sliding plate 7 In the opposite direction to the movement of the first rack 5, the plurality of sliding plates 7 will move together since the plurality of sliding plates 7 are connected to each other. During the lateral movement of the movable base 4 , the sliding plate 7 and the first rack 5 move in opposite directions at the same time, so as to ensure the stability of the movement of the movable base 4 .

It should be noted that when the sliding plate 7 is at the top of the moving base 4 , the tooth slot 11 is upward, and when the sliding plate 7 is at the bottom of the moving base 4 , the tooth slot 11 is downward.

On the basis of the above specific embodiments, both ends of the top of the fixed top plate are provided with positioning plates 6, a plurality of positioning plates 6 are located on the top of the fixed top plate, and the positioning plates 6 are arranged at both ends of the chute. When the support plate 18 moves When the end of the fixed top plate needs to be reset, the reset operation of the sliding plate 7 will not be hindered.

On the basis of the above specific embodiments, the sliding plate 7 includes a fixing ring 8, a fixing frame 9, a plurality of supporting bars 10, a plurality of first rotating blocks 12 and a plurality of second rotating blocks 13, the fixing ring 8 and the fixing frame 9 are respectively arranged at both ends of the sliding plate 7, the fixing frame 9 can be inserted into the fixing ring 8, and the plurality of sliding plates 7 can be connected to each other through the interconnection between the fixing ring 8 and the fixing frame 9, and the sliding plates 7 can be connected according to the requirements. number of changes.

The plurality of support bars 10 are rotatably connected by a plurality of first rotating blocks 12 and a plurality of second rotating blocks 13 . 13 are distributed at both ends of the other side of the same support bar 10, so that the sliding plate 7 can be bent when the sliding plate 7 needs to be turned.

On the basis of the above specific embodiments, the second gear 27 is coaxially and fixedly connected to the fixing rod 21 , and the rotation of the second gear 27 drives the rotation of the fixing rod 21 .

The outer side wall of the fixing rod 21 is slidably connected with a first sliding ring 24 and a second sliding ring 26 , the fixing rod 21 penetrates the side wall of the teaching aid housing 1 , and the first sliding ring 24 and the second sliding ring 26 are respectively installed on the teaching aid housing 1 . The two side walls, the first sliding ring 24 and the second sliding ring 26 are respectively slidably connected with the two side walls of the teaching aid housing 1 . During the lateral movement of the movable seat 4 , the fixed rod 21 slides and moves with the two side walls of the teaching aid housing 1 through the first sliding ring 24 and the second sliding ring 26 .

On the basis of the above specific embodiments, the first sliding ring 24 and the second sliding ring 26 are connected by a spring 25, the spring 25 is sleeved on the fixing rod 21, the first sliding ring 24 is fixedly connected with the side wall of the cavity, and the first sliding ring 24 is fixedly connected with the side wall of the cavity. The two sliding rings 26 are fixedly connected with the second gear 27, and the radius of the second gear 27 has multiple dimensions.

When the fixing rod 21 is pulled, the spring 25 contracts while the second gear 27 moves backward, and the radius of the meshing between the second gear 27 and the third gear 28 increases; when the fixing rod 21 is pushed, the spring 25 stretches, and this When the second gear 27 moves forward, the radius of the engagement between the second gear 27 and the third gear 28 decreases. In this way, the moving speed between the moving base 4 and the sliding plate 7 can be controlled by changing the radius at which the second gear 27 meshes with the third gear 28 . When the radius of meshing increases, the speed of the third gear 28 is greater than that of the second gear 27; when the radius of meshing decreases, the speed of the third gear 28 is less than the speed of the second gear 27.

The fixing rod 21 is provided with a plurality of fixing holes 22, the fixing rod 21 is fixedly connected with the teaching aid housing 1 through the positioning rod 23, and the positioning rod 23 is inserted into the fixing hole 22 on the outer side of the teaching aid housing 1 that is closest to the teaching aid housing 1, which can play a role. fixed role.

On the basis of the above specific embodiments, the second gear 27 includes a spur gear and a bevel gear. The spur gear meshes with the first rack 5 for transmission, and the bevel gear meshes with the third gear 28 for transmission. The structure is simple. The second gear 27 has Multiple radii to achieve variable diameter design.

On the basis of the above specific embodiments, the inner wall of the cavity is provided with a plurality of guide grooves 19, the outer wall of the mold 3 is provided with guide rails matched with the guide grooves 19, and the guide grooves 19 and the guide rails are arranged vertically. When connecting, the guide rails of the mold 3 are installed in the guide grooves 19 of the inner cavity to limit the lateral position of the mold 3 and prevent the mold 3 from moving left and right; a plurality of guide grooves 19 are slidably connected to the mold 3, and the mold 3 is along the direction of the guide grooves 19. The movement has a guiding function, which reduces the shaking of the mold 3 during the up and down movement.

In practical application, when it is necessary to make teaching aids, put the mould 3 filled with concrete into the teaching aid housing 1, select different screed plates 2 according to the shape of the mould 3, and place the support plate 18 on the positioning plate 6 , turn on the motor 20 to drive the third gear 28 to rotate, pull out the positioning rod 23 and adjust the fixing rod 21 to an appropriate position, insert the first fixing hole 22 on the outside of the teaching aid housing 1 into the positioning rod 23, and change the second gear 27 The radius of engagement with the third gear 28 controls the rate of movement between the moving base 4 and the sliding plate 7 . When the moving base 4 moves, the support plate 18 can drive the mold 3 and the second rack 14 to move downward when the support plate 18 falls from the vertical side. When the support plate 18 rises through the arc edge, it drives the mold 3 and the second rack 14 to move upward. , through the up and down movement of the mold 3 to achieve the effect of vibration and compaction.

When the second rack 14 moves downward, it drives the first gear 15 to move counterclockwise, and the first gear 15 drives the third rack 16 to move upward. When the third rack 16 moves upward, the connecting rope 17 becomes loose and finds a flat plate. 2. The operation of leveling the concrete in the mold 3 by moving downward; when the second rack 14 moves upward, it drives the first gear 15 to move clockwise, and the first gear 15 drives the third rack 16 to move down. During the downward movement of the rack 16 , the nylon rope is tightened and the flat plate 2 moves upward, and the continuous leveling operation is realized through the continuous up and down movement of the second rack 14 .

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

The pouring teaching aids provided by the present invention have been described in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A pouring teaching aid is characterized in that, comprising teaching aid housing (1), mould (3), moving seat (4), described teaching aid housing (1) is provided with cavity, and described mould (3) is arranged on In the cavity, the bottom of the side wall of the teaching aid housing (1) is provided with a through hole, the movable seat (4) is slidably connected in the through hole, and the top of the movable seat (4) is opened There are a plurality of movement slots (31), one side of the movement slot (31) is an arc edge, the side opposite to the arc edge is a vertical edge, and the bottom of the movement slot (31) is connected to the arc The arc surface of the shaped edge and the vertical edge, the bottom of the mold (3) is fixedly connected with the support plate (18), and the bottom of the support plate (18) is installed in the movement groove (31), so The bottom of the support plate (18) is in sliding connection with the movement groove (31). 2. The pouring teaching aid according to claim 1, wherein the outer wall of the mold (3) is fixedly connected with a second rack (14), and the inner wall of the cavity is fixedly connected with a third rack (14). 16), the second rack (14) and the third rack (16) are connected in a transmission through the first gear (15), the top of the cavity is provided with a plurality of positioning rings (30), a plurality of The positioning ring (30) is provided with the same connecting rope (17), the third rack (16) is connected with the top of the screed plate (2) through the connecting rope (17), and the scout plate (2) ) and the mould (3) are both horizontally arranged, and the screed plate (2) is positioned just above the mould (3); The side wall of the screed plate (2) can be closely attached to the inner wall of the mold (3). 3. The pouring teaching aid according to claim 2, wherein a motor (20) is provided at the bottom of the outer side wall of the teaching aid housing (1), and the output end of the motor (20) runs through the teaching aid housing (1). 1) side wall, the side wall of the motor (20) is perpendicular to the side wall of the through hole, the output end of the motor (20) is coaxially and fixedly connected with the rotating rod (29), the rotating rod (29) is coaxially and fixedly connected with the third gear (28), The moving seat (4) includes a fixed bottom plate, a plurality of support rods and a fixed top plate, the top of the fixed bottom plate and the bottom of the fixed top plate are fixedly connected by a plurality of the support rods, and the top of the fixed bottom plate is fixedly arranged There is a first rack (5), the first rack (5) is meshed with a second gear (27) for transmission, the second gear (27) is meshed with the third gear (28), and the Both the second gear (27) and the third gear (28) are arranged in the cavity; A plurality of the support rods are respectively fixedly connected to the top four corners of the fixed bottom plate. 4. The pouring teaching aid according to claim 3, wherein the fixed top plate is provided with a chute on the opposite side walls, and a plurality of sliding plates (7) are slidably connected in the Each of the sliding plates (7) is provided with a tooth slot (11), and the tooth slot (11) is engaged with the third gear (28) for transmission. 5 . The pouring teaching aid according to claim 4 , wherein positioning plates ( 6 ) are provided on both ends of the top of the fixed top plate. 6 . 6 . The pouring teaching aid according to claim 4 , wherein the sliding plate ( 7 ) comprises a fixing ring ( 8 ), a fixing frame ( 9 ), a plurality of supporting bars ( 10 ), a plurality of first rotating A block (12) and a plurality of second rotating blocks (13), the fixing ring (8) and the fixing frame (9) are respectively arranged at both ends of the sliding plate (7), the fixing frame (9) ) can be inserted into the fixing ring (8), A plurality of the support bars (10) are rotatably connected by a plurality of the first rotating blocks (12) and a plurality of the second rotating blocks (13), and the plurality of the first rotating blocks (12) are distributed At one end of one side of the support bar (10), a plurality of the second rotating blocks (13) are distributed on the other two ends of the same support bar (10). 7 . The pouring teaching aid according to claim 3 , wherein the second gear ( 27 ) is coaxially and fixedly connected with the fixing rod ( 21 ), and the outer side wall of the fixing rod ( 21 ) is slidably connected with the first gear 7 . A sliding ring (24) and a second sliding ring (26), the fixing rod (21) penetrates the side wall of the teaching aid housing (1), the first sliding ring (24) and the second sliding ring (26) are respectively slidably connected with the two side walls of the teaching aid housing (1). 8 . The pouring teaching aid according to claim 7 , wherein the first sliding ring ( 24 ) and the second sliding ring ( 26 ) are connected by a spring ( 25 ), and the spring ( 25 ) is sleeved On the fixing rod (21), the first sliding ring (24) is fixedly connected with the side wall of the cavity, and the second sliding ring (26) is fixedly connected with the second gear (27) , the radius of the second gear (27) has multiple dimensions, The fixing rod (21) is provided with a plurality of fixing holes (22), and the fixing rod (21) is fixedly connected with the teaching aid housing (1) through a positioning rod (23). 9 . The pouring teaching aid according to claim 8 , wherein the second gear ( 27 ) comprises a spur gear and a bevel gear, and the spur gear meshes with the first rack ( 5 ) for transmission, so the The bevel gear meshes with the third gear (28) for transmission. 10. The pouring teaching aid according to any one of claims 1-9, wherein the inner wall of the cavity is provided with a plurality of guide grooves (19), and the outer wall of the mold (3) is provided with a plurality of guide grooves (19). The guide grooves (19) are matched with the guide rails, and a plurality of the guide grooves (19) are slidably connected with the mold (3).

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