Gravel screening device

Abstract

The utility model provides a gravel screening device. Belongs to the technical field of gravel screening. According to the technical key points, the screening device comprises a bottom plate, the top of the bottom plate is fixedly connected with a first n-shaped frame and a second n-shaped frame which are arranged in a spaced mode, three screening frames are sequentially and rotationally connected into the first n-shaped frame from top to bottom, a lifting assembly is arranged in the second n-shaped frame, and the ends, close to the second n-shaped frame, of the screening frames are connected with the lifting assembly; a vibration assembly is arranged at the bottom of the bottom plate; the utility model aims to provide a screening device capable of finely screening gravels. The sand and gravel screening device is used for solving the problems that when a traditional sand and gravel screening device conducts screening, due to limitation of the technology and cost, a small amount of large sand and gravel are not screened out and mixed into screened small sand and gravel, the screening efficiency is low, and follow-up sand and gravel machining is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of sand and gravel screening, in particular to a sand and gravel screening device. Background Technique

[0002] Sand and gravel refers to the loose mixture of sand grains and crushed stones, which is often widely used as high-quality building materials and concrete raw materials in fields such as houses, roads, highways, railways, and projects. It is an extremely important raw material in the construction field. In the process of crushing and processing stone materials by a sand and gravel production line, the produced finished stones include both sand materials with smaller particles and stone materials with larger particle sizes. Therefore, before the sand and gravel are put into use, it is necessary to screen them according to size, fineness, etc.

[0003] The current sand and gravel screening device, as described in the patent with publication number CN218982270U, includes a screening device body, a sieve plate, and a sand discharge plate, and also includes a vibration and discharge mechanism. The structure of the vibration and discharge mechanism includes a U-shaped frame, cross bar A, cross bar B, a support plate, inclined guide plate A, inclined guide plate B, a side box, and a vibration motor. A sieve plate for screening sand and gravel and a sand discharge plate for discharging sand are installed in the box body of the screening device body. A vibration and discharge mechanism is arranged at the sieve plate and the sand discharge plate of the screening device body. The vibration transmission structure of the vibration and discharge mechanism can be attached to the lower end of the low-position plate body of the sieve plate and the sand discharge plate. When the sieve plate of the screening device body screens waste sand and gravel materials and cooperates with the sand discharge plate for discharging materials, the vibration and discharge mechanism can transmit the vibration force to the low-position end plate bodies of the sieve plate and the sand discharge plate, so that the sieve plate and the sand discharge plate can obtain vibration force compensation at the low-position end plate bodies and discharge materials at a high frequency.

[0004] Regarding the above related technologies, the inventor believes that due to technical and cost limitations, there will still be a small amount of large sand and gravel that are not screened out during the screening process of traditional sand and gravel screening devices and are mixed into the fine sand and gravel screened out. The screening efficiency is low and it will affect the subsequent sand and gravel processing. Content of the Utility Model

[0005] The purpose of the utility model is to provide a sand and gravel screening device to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A sand and gravel screening device, comprising a bottom plate, wherein a first n-shaped frame and a second n-shaped frame which are arranged at intervals are fixedly connected to the top of the bottom plate. Three sieve frames are sequentially rotatably connected inside the first n-shaped frame from top to bottom. One end of the sieve frame close to the first n-shaped frame is provided with a funnel-shaped opening. Slots are vertically formed on both sides of one end of the sieve frame close to the first n-shaped frame. A baffle is movably inserted into the two slots in common. A locking assembly is arranged inside the baffle. A number of sieve holes are formed in the inner bottom of the top sieve frame and the middle sieve frame. The diameter of the sieve holes in the top sieve frame is larger than that of the sieve holes in the middle sieve frame. A lifting assembly is arranged inside the second n-shaped frame. One end of the sieve frame close to the second n-shaped frame is connected to the lifting assembly. A vibration assembly is arranged at the bottom of the bottom plate. A collecting mechanism adapted to each sieve frame is arranged on one side of the bottom plate.

[0008] As a further solution of the present utility model: The locking assembly includes a cavity arranged inside the baffle. Two insertion rods which are arranged at intervals are movably arranged inside the cavity. A first spring is arranged between the two insertion rods. A jack corresponding to the insertion rod is formed on one side of the inner wall of the slot. The opposite ends of the two insertion rods are fixedly connected with a dial. A notch adapted to the two dials is formed on the top of the baffle. A limiting block is fixedly connected to the middle of the surface of the insertion rod. A limiting groove adapted to the limiting block is formed on the top of the baffle.

[0009] As a further solution of the present utility model: The lifting assembly includes a threaded rod and two guide rods which are vertically arranged inside the second n-shaped frame. The threaded rod is rotatably connected between the top of the bottom plate and the inner top of the second n-shaped frame. The top end of the threaded rod penetrates out of the second n-shaped frame. A driving motor is arranged on the top of the second n-shaped frame. The output end of the driving motor is connected to the top end of the threaded rod. The two guide rods are respectively arranged on both sides of the threaded rod and are fixedly connected between the top of the bottom plate and the inner top of the second n-shaped frame. A lifting plate which is hinged to one end of each sieve frame is threadedly connected to the outer surface of the threaded rod. Limiting plates corresponding to each lifting plate are fixedly connected to both sides inside the second n-shaped frame. The limiting plates are arranged below the corresponding lifting plates.

[0010] As a further solution of the present utility model: The vibration assembly includes a vibration motor fixedly connected to the bottom of the bottom plate. Telescopic rods are fixedly connected to the four corners of the bottom of the bottom plate. The lower half of the telescopic rod is movably sleeved with a telescopic sleeve. A limiting ring fixed to the outer circle of the bottom of the telescopic rod is arranged inside the telescopic sleeve. A second spring is arranged between the top of the limiting ring and the inner top of the telescopic sleeve. A third spring is arranged between the bottom of the limiting ring and the inner bottom of the telescopic sleeve.

[0011] As a further solution of the utility model: the collection mechanism includes a fixed frame arranged at one side of the bottom plate at intervals. Locking universal wheels are fixedly connected to the four corners of the bottom of the fixed frame. Collection boxes corresponding to the three sieve frames one by one are movably inserted into the fixed frame. A handle is fixedly connected to one side of the collection box.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] After the utility model adopts the above structure, by arranging three sieve frames, and a plurality of sieve holes are opened at the inner bottom of the top sieve frame and the middle sieve frame. The diameter of the sieve holes in the top sieve frame is larger than that in the middle sieve frame, realizing the function of fine screening of sand and gravel. It greatly improves the problem that in the traditional sand and gravel screening device, due to technical and cost limitations, a small amount of large sand and gravel will still not be screened out and be mixed into the fine sand and gravel screened out, resulting in low screening efficiency and affecting the subsequent sand and gravel processing. The screening efficiency is improved; through the cooperation of the lifting component, the collection mechanism, the baffle and the locking component, the baffle can be quickly removed through the locking component, then the three sieve frames are controlled to tilt to one side through the lifting component, and finally the screened sand and gravel are conveniently collected through the collection mechanism, improving the practicability of the sand and gravel screening device. Description of the Drawings

[0014] The following further describes the present utility model in detail with reference to the embodiments in the drawings, but does not constitute any limitation to the present utility model.

[0015] Figure 1 It is a structural schematic diagram of a sand and gravel screening device.

[0016] Figure 2 It is a sectional view of a sand and gravel screening device.

[0017] Figure 3 It is a structural schematic diagram of a sieve frame in a sand and gravel screening device.

[0018] Figure 4 It is a structural schematic diagram of a lifting component in a sand and gravel screening device.

[0019] Figure 5 It is a structural schematic diagram of a locking component in a sand and gravel screening device.

[0020] Figure 6 It is a schematic diagram of the internal structure of a telescopic sleeve in a sand and gravel screening device.

[0021] In the figure: 1. Bottom plate; 2. First n-shaped frame; 3. Second n-shaped frame; 4. Sieve frame; 5. Slot; 6. Baffle; 7. Locking assembly; 701. Cavity; 702. Plug rod; 703. First spring; 704. Jack; 705. Paddle; 706. Notch; 707. Limit block; 708. Limit groove; 8. Lifting assembly; 801. Threaded rod; 802. Guide rod; 803. Driving motor; 804. Lifting plate; 805. Limiting plate; 9. Vibration assembly; 901. Vibration motor; 902. Telescopic rod; 903. Telescopic sleeve; 904. Limit ring; 905. Second spring; 906. Third spring; 10. Collection mechanism; 1001. Fixed frame; 1002. Lockable universal wheel; 1003. Collection box; 1004. Handle. Detailed implementation mode

[0022] The technical solution of this patent will be further described in detail below in conjunction with the specific implementation mode.

[0023] Please refer to Figure 1-6 , a sand and gravel screening device, including a bottom plate 1. At the top of the bottom plate 1, a first n-shaped frame 2 and a second n-shaped frame 3 are fixedly connected at intervals. Inside the first n-shaped frame 2, three sieve frames 4 are rotatably connected in sequence from top to bottom. One end of the sieve frame 4 close to the first n-shaped frame 2 is arranged in a funnel-shaped opening. On both sides of one end of the sieve frame 4 close to the first n-shaped frame 2, slots 5 are opened vertically. A baffle 6 is movably inserted in the two slots 5 together. The baffle 6 is provided to prevent sand and gravel from leaking out from the open side of the sieve frame 4 when screening sand and gravel. A locking assembly 7 is arranged inside the baffle 6. The locking assembly 7 can be used to quickly disassemble and assemble the baffle 6, thereby improving work efficiency. A number of sieve holes are opened at the inner bottom of the top sieve frame 4 and the middle sieve frame 4. The diameter of the sieve holes in the top sieve frame 4 is larger than the diameter of the sieve holes in the middle sieve frame 4, realizing the function of fine screening of sand and gravel. A lifting assembly 8 is arranged inside the second n-shaped frame 3, which is used to control the three sieve frames 4 to tilt to one side, facilitating the dumping of the screened sand and gravel. One end of the sieve frame 4 close to the second n-shaped frame 3 is connected to the lifting assembly 8. A vibration assembly 9 is arranged at the bottom of the bottom plate 1. By arranging the vibration assembly 9, the sieve frame 4 is vibrated, so as to vibrate and screen the sand and gravel in the sieve frame 4. A collection mechanism 10 adapted to each sieve frame 4 is arranged on one side of the bottom plate 1, which is used to collect the screened sand and gravel.

[0024] Further, the locking assembly 7 includes a cavity 701 provided in the baffle 6. Two insertion rods 702 spaced apart are movably provided inside the cavity 701. A first spring 703 is provided between the two insertion rods 702. A jack 704 corresponding to the insertion rod 702 is opened on one side of the inner wall of the slot 5. Opposite ends of the two insertion rods 702 are fixedly connected with a dial 705. A notch 706 adapted to the two dials 705 is opened at the top of the baffle 6. A limiting block 707 is fixedly connected to the middle of the surface of the insertion rod 702. A limiting groove 708 adapted to the limiting block 707 is opened at the top of the baffle 6. By providing the limiting groove 708 and the limiting block 707 to limit the insertion rod 702, it is avoided that the two insertion rods 702 deviate to the same side during the movement, resulting in the situation that one insertion rod 702 cannot be disengaged from the jack 704. When it is necessary to remove the baffle 6, by relatively pressing the two dials 705 (the first spring 703 will be compressed), the two insertion rods 702 are driven to simultaneously disengage from the jack 704, and then the baffle 6 can be removed from the slot 5.

[0025] Further, the lifting assembly 8 includes a threaded rod 801 and two guide rods 802 vertically provided in the second n-shaped frame 3. The threaded rod 801 is rotatably connected between the top of the bottom plate 1 and the inner top of the second n-shaped frame 3. The top end of the threaded rod 801 penetrates out of the second n-shaped frame 3. A driving motor 803 is provided at the top of the second n-shaped frame 3. The output end of the driving motor 803 is connected to the top end of the threaded rod 801. The two guide rods 802 are respectively provided on both sides of the threaded rod 801 and are fixedly connected between the top of the bottom plate 1 and the inner top of the second n-shaped frame 3. A lifting plate 804 hinged to one end of each sieve frame 4 is threadedly connected to the outer surface of the threaded rod 801. Limiting plates 805 corresponding to each lifting plate 804 are fixedly connected to both sides inside the second n-shaped frame 3. The limiting plates 805 are provided below the corresponding lifting plates 804. By providing the limiting plates 805, the lifting plates 804 can be limited, so that when the lifting plates 804 descend and reset, the sieve frames 4 are in a horizontal state. By starting the driving motor 803, the threaded rod 801 can be driven to rotate, and then each lifting plate 804 can be driven to drive one end of the sieve frame 4 to rise or fall, so that the sieve frame 4 is in an inclined state, facilitating the dumping of sand and gravel.

[0026] Further, the vibration assembly 9 includes a vibration motor 901 fixedly connected to the bottom of the bottom plate 1. At the four corners of the bottom of the bottom plate 1, telescopic rods 902 are fixedly connected. The lower half of the telescopic rod 902 is movably sleeved with a telescopic sleeve 903. A limiting ring 904 is fixedly connected to the outer ring of the bottom of the telescopic rod 902 and is located inside the telescopic sleeve 903. A second spring 905 is arranged between the top of the limiting ring 904 and the inner top of the telescopic sleeve 903. A third spring 906 is arranged between the bottom of the limiting ring 904 and the inner bottom of the telescopic sleeve 903. When screening sand and gravel, start the vibration motor 901. The vibration generated by the vibration motor 901 will be transmitted to the sieve frame 4 through the bottom plate 1, the first n-shaped frame 2 and the second n-shaped frame 3, thereby driving the sieve frame 4 to vibrate and screen the sand and gravel.

[0027] Further, the collection mechanism 10 includes a fixed frame 1001 arranged at one side of the bottom plate 1 at intervals. At the four corners of the bottom of the fixed frame 1001, locking universal wheels 1002 are fixedly connected. The arrangement of the locking universal wheels 1002 facilitates the movement of the fixed frame 1001. A collection box 1003 corresponding to the three sieve frames 4 one by one is movably inserted into the fixed frame 1001 for collecting the sand and gravel poured into each sieve frame 4. A handle 1004 is fixedly connected to one side of the collection box 1003, which is convenient for pulling out the collection box 1003 from the fixed frame 1001.

[0028] During use, pour the sand and gravel into the sieve frame 4 at the top, and then start the vibration motor 901. The vibration generated by the vibration motor 901 will be transmitted to the sieve frame 4 through the bottom plate 1, the first n-shaped frame 2 and the second n-shaped frame 3, thereby driving the sieve frame 4 to vibrate, and screening the sand and gravel through the sieve holes. After screening, by relatively pressing the two paddles 705, drive the two insertion rods 702 to simultaneously disengage from the insertion holes 704, take out the baffle 6 from the slot 5, then move the collection mechanism 10 to one side of the sieve frame 4, and finally start the drive motor 803 to drive the threaded rod 801 to rotate, and then simultaneously drive each lifting plate 804 to drive one end of the sieve frame 4 to rise, so that the sieve frame 4 is in an inclined state, which is convenient for pouring the sand and gravel in the sieve frame 4 into the collection mechanism 10.

[0029] The above embodiments are the preferred embodiments of the present invention, which are only used to conveniently illustrate the present invention and do not limit the present invention in any form. Any person with ordinary knowledge in the technical field, without departing from the technical features of the present invention, uses the technical content disclosed by the present invention to make equivalent embodiments with partial changes or modifications, and without departing from the technical feature content of the present invention, still belongs to the scope of the technical features of the present invention.

Claims

1. A sand and gravel screening device, comprising a bottom plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected to a first n-shaped frame (2) and a second n-shaped frame (3) which are arranged at intervals. Three screen frames (4) are rotatably connected inside the first n-shaped frame (2) from top to bottom in sequence. The end of the screen frame (4) close to the first n-shaped frame (2) is openly arranged in a funnel shape. Both sides of the end of the screen frame (4) close to the first n-shaped frame (2) are provided with slots (5) in the vertical direction. Baffles (6) are movably inserted in the two slots (5). A locking assembly is provided inside the baffle (6). (7), a plurality of sieve holes are provided on the inner bottom of the sieve frame (4) located at the top and the sieve frame (4) located at the middle, the sieve hole diameter of the top sieve frame (4) being larger than the sieve hole diameter of the middle sieve frame (4), a lifting assembly (8) is provided inside the second n-shaped frame (3), one end of the sieve frame (4) close to the second n-shaped frame (3) is connected to the lifting assembly (8), a vibration assembly (9) is provided at the bottom of the bottom plate (1), and a collecting mechanism (10) adapted to each sieve frame (4) is provided on one side of the bottom plate (1).

2. A sand and gravel screening device according to claim 1, characterized in that: The locking assembly (7) comprises a cavity (701) arranged in the baffle (6); two plug rods (702) are movably arranged inside the cavity (701) and are distributed at intervals; a first spring (703) is arranged between the two plug rods (702); a plug hole (704) corresponding to the plug rod (702) is provided on one side of the inner wall of the slot (5); the opposite ends of the two plug rods (702) are fixedly connected with paddles (705); a notch (706) matched with the two paddles (705) is provided on the top of the baffle (6); a limit block (707) is fixedly connected to the middle of the surface of the plug rod (702); and a limit groove (708) matched with the limit block (707) is provided on the top of the baffle (6).

3. A sand and gravel screening device according to claim 1, characterized in that: The lifting assembly (8) comprises a threaded rod (801) and two guide rods (802) vertically arranged in the second n-shaped frame (3); the threaded rod (801) is rotatably connected between the top of the bottom plate (1) and the inner top of the second n-shaped frame (3); the top end of the threaded rod (801) passes through the second n-shaped frame (3); a driving motor (803) is arranged at the top of the second n-shaped frame (3); the output end of the driving motor (803) is connected to the top end of the threaded rod (801); Two guide rods (802) are respectively arranged on both sides of the threaded rod (801) and fixedly connected between the top of the bottom plate (1) and the inner top of the second n-shaped frame (3); the outer surface of the threaded rod (801) is threadedly connected with a lifting plate (804) hinged to one end of each screen frame (4); and both sides of the interior of the second n-shaped frame (3) are fixedly connected with limiting plates (805) corresponding to each lifting plate (804) one by one. The limiting plates (805) are arranged below the corresponding lifting plates (804).

4. A sand and gravel screening device according to claim 1, characterized in that: The vibration assembly (9) comprises a vibration motor (901) fixedly connected to the bottom of the base plate (1); telescopic rods (902) are fixedly connected at the four corners of the bottom of the base plate (1); a telescopic sleeve (903) is movably sleeved on the lower half of the telescopic rod (902); the outer ring of the bottom of the telescopic rod (902) is fixedly connected to a limiting ring (904) located inside the telescopic sleeve (903); a second spring (905) is arranged between the top of the limiting ring (904) and the inner top of the telescopic sleeve (903); and a third spring (906) is arranged between the bottom of the limiting ring (904) and the inner bottom of the telescopic sleeve (903).

5. A sand and gravel screening device according to claim 1, characterized in that: The collecting mechanism (10) comprises a fixing frame (1001) arranged at intervals on one side of the bottom plate (1), the fixing frame (1001) having four bottom corners fixedly connected thereto with locking universal wheels (1002), a collecting box (1003) corresponding to three sieve frames (4) being movably inserted inside the fixing frame (1001), and a handle (1004) being fixedly connected to one side of the collecting box (1003).

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