A crushing and screening device for road and bridge construction

Abstract

The utility model relates to the technical field of sand and gravel crushing and screening, and in particular to a crushing and screening device for road and bridge construction, comprising a crusher body, a screening cylinder installed obliquely downward is arranged on one side of the crusher body, and a conveyor belt placed obliquely upward is installed at the bottom end of the crusher body. The advantages of the utility model are: by setting the crusher body, the conveyor belt and the screening cylinder, the conveyor belt is placed obliquely, and then the crusher body crushes the sand and gravel, and then freely falls onto the conveyor belt, and the conveyor belt transports the sand and gravel to the inside of the support frame, three screens are installed inside the support frame, and the mesh numbers of the three screens decrease in sequence, and at the same time, one end of the support frame is fixedly connected to the output end of the driving motor, and the driving motor is powered on to drive the support frame to rotate, so as to facilitate the screening of the crushed sand and gravel, thereby screening out four different sizes of sand and gravel, and the overall structure is simple, which effectively solves the problems existing in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of sandstone crushing and screening, in particular to a crushing and screening device for road and bridge construction. Background Art

[0002] Crushed stone is an indispensable base material in road and bridge construction. In order to obtain crushed stone of suitable particle size, crushers are usually used to crush large pieces of sand and gravel in road and bridge construction, and the crushed sand and gravel are screened. However, the existing screening device is generally only equipped with a single screen with a fixed number of screen holes, so it can only screen sand and gravel of a certain size. The screened sand and gravel are of different sizes, which has a certain impact on the later recycling and use. Based on this, a crushing and screening device for road and bridge construction is proposed to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a crushing and screening device for road and bridge construction, which effectively solves the deficiencies of the prior art.

[0004] In order to achieve the above-mentioned purpose, an embodiment of the utility model on one hand provides a crushing and screening device for road and bridge construction, including a crusher body, a screening drum installed obliquely downward is arranged on one side of the crusher body, a conveyor belt placed obliquely upward is installed at the bottom end of the crusher body, the top of the conveyor belt enters into the interior of the screening drum, a support frame rotating in a circle along its axial direction is installed inside the screening drum, three screens with decreasing mesh sizes are installed on the inner wall of the support frame, three first discharge pipes are installed at the bottom of the outer wall of the screening drum near the three screens, a second discharge pipe is installed at the end of the screening drum away from the crusher body, a mounting seat is provided on the outer wall of the second discharge pipe, and a driving motor is installed on the side thereof, and the output end of the driving motor is fixedly connected to one end of the support frame.

[0005] Preferably, any of the above schemes is that four limiting rings in an annular structure are installed on the inner wall of the screening drum, and gaps are left between the four limiting rings and the outer wall of the support frame. By using this scheme, movement interference between the four limiting rings and the outer wall of the support frame is avoided, and three first discharge pipes are installed on the bottom of the outer wall of the screening drum. At the same time, the bottom ends of the three first discharge ports all adopt a conical structure, which is convenient for guiding sand and gravel of different sizes on the one hand, and effectively avoids the mixing of sand and gravel of different sizes on the other hand.

[0006] Preferably, any of the above schemes is that the outer wall of the support frame is equipped with a plurality of limit rollers which are rollingly connected to the limit ring, and the plurality of limit rollers are distributed in a circular array with the axis of the support frame as the center. By using this scheme, it is convenient to install the support frame inside the screening drum, and at the same time, the plurality of limit rollers can make the support frame and the inner wall of the screening drum roll relative to each other, thereby reducing the resistance of the support frame when it rotates. At the same time, the limit roller cooperates with the limit ring to limit the support frame, so that the three screens are stably placed above the first discharge pipe.

[0007] Preferably, the support frame is hollow in design, and the inner wall of the support frame is provided with three annular mounting grooves, and the sizes of the three annular mounting grooves are matched with the sizes of the three screens. By using this scheme, it is convenient to provide installation positions for the three screens, and it is convenient for users to limit the three screens and lock the three screens at a later time, so that the three screens can rotate relatively with the support frame. The support frame adopts a hollow structure, which is convenient for supporting the screens on the one hand, and for the smooth falling of sand and gravel on the other hand.

[0008] Preferably, any of the above schemes is that both sides of the conveyor belt are fixedly connected to the end of the crusher body and the screening drum by bolts respectively, and the conveyor belt extends into the interior of the support frame. By using this scheme, it is convenient to fix the position of the conveyor belt, so that one end of the conveyor belt enters the interior of the support frame, and the crushed sand and gravel are transported to the interior of the support frame through the operation of the conveyor belt. The sand and gravel can be screened by rotating the support frame.

[0009] The utility model has the following advantages:

[0010] 1. The crushing and screening device for road and bridge construction is provided with a crusher body, a conveyor belt and a screening drum. The conveyor belt is placed at an angle, and then the crusher body crushes the sand and gravel, and then falls freely onto the conveyor belt. The conveyor belt transports the sand and gravel to the inside of the support frame. Three screens are installed inside the support frame, and the mesh numbers of the three screens decrease successively. At the same time, one end of the support frame is fixedly connected to the output end of the driving motor. When the driving motor is powered on, the support frame is driven to rotate, which is convenient for screening the crushed sand and gravel, thereby screening out four different sizes of sand and gravel. The overall structure is simple, and the problems existing in the prior art are effectively solved.

[0011] 2. The crushing and screening device for road and bridge construction is provided with a support frame and a screening cylinder. Four limit rings are installed inside the screening cylinder, and a plurality of limit rollers are installed on the outer wall of the support frame. The plurality of limit rollers cooperate with the four limit rings to limit the support frame, and the driving motor is convenient for driving the support frame to rotate, thereby ensuring stable screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the cutaway structure of the utility model as a whole;

[0014] Figure 3 It is a partial cutaway structural schematic diagram of the utility model as a whole;

[0015] Figure 4 It is a schematic diagram of the cutaway structure of the screening cylinder of the utility model;

[0016] Figure 5 This is a schematic diagram of the support frame structure of the utility model.

[0017] In the figure: 1-crusher body, 2-conveyor belt, 3-screening cylinder, 4-mounting seat, 5-driving motor, 6-second discharge pipe, 7-first discharge pipe, 8-support frame, 9-limiting ring, 10-limiting roller, 11-screen, 12-annular mounting groove. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0019] like Figures 1 to 5 As shown, a crushing and screening device for road and bridge construction includes a crusher body 1, a screening drum 3 installed obliquely downward is arranged on one side of the crusher body 1, a conveyor belt 2 placed obliquely upward is installed at the bottom end of the crusher body 1, the top of the conveyor belt 2 enters into the interior of the screening drum 3, a support frame 8 rotating in a circle along its axial direction is installed inside the screening drum 3, three screens 11 with decreasing mesh sizes are installed on the inner wall of the support frame 8, three first discharge pipes 7 are installed at the bottom of the outer wall of the screening drum 3 near the three screens 11, a second discharge pipe 6 is installed at the end of the screening drum 3 away from the crusher body 1, a mounting seat 4 is arranged on the outer wall of the second discharge pipe 6, and a driving motor 5 is installed on the side thereof, and the output end of the driving motor 5 is fixedly connected to one end of the support frame 8.

[0020] Four limiting rings 9 in an annular structure are installed on the inner wall of the screening drum 3, and gaps are left between the four limiting rings 9 and the outer wall of the support frame 8. As an optional technical solution of the utility model, this avoids movement interference between the four limiting rings 9 and the outer wall of the support frame 8, and three first discharge pipes 7 are installed at the bottom of the outer wall of the screening drum 3. At the same time, the bottom ends of the three first discharge ports 7 all adopt a conical structure, which is convenient for guiding sand and gravel of different sizes on the one hand, and effectively avoids the mixing of sand and gravel of different sizes on the other hand.

[0021] The outer wall of the support frame 8 is equipped with multiple limiting rollers 10 that are rollingly connected to the limiting ring 9. The multiple limiting rollers 10 are distributed in a circular array with the axis of the support frame 8 as the center. As an optional technical solution of the utility model, this facilitates the installation of the support frame 8 inside the screening drum 3. At the same time, the multiple limiting rollers 10 can enable the support frame 8 and the inner wall of the screening drum 3 to roll relative to each other, reducing the resistance of the support frame 8 when it rotates. At the same time, the limiting rollers 10 cooperate with the limiting ring 9 to limit the support frame 8, so that the three screens 11 are stably placed above the first discharge pipe 7.

[0022] The support frame 8 is hollowed out, and the inner wall of the support frame 8 is provided with three annular mounting grooves 12. The sizes of the three annular mounting grooves 12 are matched with the sizes of the three sieves 11. As an optional technical solution of the utility model, this facilitates providing installation positions for the three sieves 11, facilitates the users to limit the three sieves 11, and facilitates the users to lock the three sieves 11 at a later time, so that the three sieves 11 can rotate relatively with the support frame 8. The support frame 8 adopts a hollow structure, which is convenient for supporting the sieves 11 on the one hand, and for the smooth falling of sand and gravel on the other hand.

[0023] Both sides of the conveyor belt 2 are fixedly connected to the end of the crusher body 1 and the screening drum 3 by bolts respectively. The conveyor belt 2 extends into the interior of the support frame 8. As an optional technical solution of the utility model, this facilitates the position of the conveyor belt 2 to be fixed, so that one end of the conveyor belt 2 enters the interior of the support frame 8, and the crushed sand and gravel are transported to the interior of the support frame 8 through the operation of the conveyor belt 2. The rotation of the support frame 8 facilitates the screening of the sand and gravel.

[0024] The crushing and screening device for road and bridge construction requires the following steps when used:

[0025] 1) When in use, the crusher body 1 crushes the sand and gravel, and then falls freely onto the conveyor belt 2;

[0026] 2) The conveyor belt 2 runs to transport the sand and gravel to the inside of the support frame 8;

[0027] 3) The driving motor 5 is powered on to drive the support frame 8 to rotate. Since the support frame 8 is tilted downward, the sand and gravel rotate and move downward;

[0028] 4) The sand and gravel pass through three sieves 11 with different mesh sizes, so as to facilitate screening of sand and gravel of different sizes.

[0029] To sum up, when the user uses it, by setting the crusher body 1, the conveyor belt 2 and the screening drum 3, the conveyor belt 2 is placed at an angle, and then the crusher body 1 crushes the sand and gravel, and then falls freely onto the conveyor belt 2, and the conveyor belt 2 transports the sand and gravel to the inside of the support frame 8. Three screens 11 are installed inside the support frame 8, and the mesh numbers of the three screens 11 decrease successively. At the same time, one end of the support frame 8 is fixedly connected to the output end of the driving motor 5, and the driving motor 5 is powered on to drive the support frame 8 to rotate, so as to facilitate the screening of the crushed sand and gravel, thereby screening out four different sizes of sand and gravel. The overall structure is simple, and the problems existing in the prior art are effectively solved. Then, by setting the support frame 8 and the screening drum 3, four limiting rings 9 are installed inside the screening drum 3, and a plurality of limiting rollers 10 are installed on the outer wall of the support frame 8. The plurality of limiting rollers 10 cooperate with the four limiting rings 9 to limit the support frame 8, and at the same time, it is convenient for the driving motor 5 to drive the support frame 8 to rotate, so as to ensure the stable screening.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crushing and screening device for road and bridge construction, characterized in that: The invention comprises a crusher body (1), a sieving drum (3) installed obliquely downward is arranged on one side of the crusher body (1), a conveyor belt (2) placed obliquely upward is installed at the bottom end of the crusher body (1), the top end of the conveyor belt (2) enters into the interior of the sieving drum (3), a support frame (8) rotating in a circle along its axial direction is installed inside the sieving drum (3), three sieves (11) with decreasing mesh sizes are installed on the inner wall of the support frame (8), three first discharge pipes (7) are installed at the bottom of the outer wall of the sieving drum (3) near the three sieves (11), a second discharge pipe (6) is installed at the end of the sieving drum (3) away from the crusher body (1), a mounting seat (4) is arranged on the outer wall of the second discharge pipe (6), and a driving motor (5) is installed on the side thereof, and the output end of the driving motor (5) is fixedly connected to one end of the supporting frame (8).

2. A crushing and screening device for road and bridge construction according to claim 1, characterized in that: Four limiting rings (9) in an annular structure are installed on the inner wall of the screening cylinder (3), and gaps are left between the four limiting rings (9) and the outer wall of the support frame (8).

3. A crushing and screening device for road and bridge construction according to claim 2, characterized in that: The outer wall of the support frame (8) is provided with a plurality of limiting rollers (10) which are rollingly connected to the limiting ring (9), and the plurality of limiting rollers (10) are distributed in a circular array with the axis of the support frame (8) as the center.

4. A crushing and screening device for road and bridge construction according to claim 3, characterized in that: The support frame (8) is of hollow design, and the inner wall of the support frame (8) is provided with three annular mounting grooves (12), and the sizes of the three annular mounting grooves (12) are adapted to the sizes of the three screens (11).

5. A crushing and screening device for road and bridge construction according to claim 4, characterized in that: Both sides of the conveyor belt (2) are fixedly connected to the end of the pulverizer body (1) and the screening drum (3) respectively by bolts, and the conveyor belt (2) extends into the interior of the support frame (8).

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