Material screening device

Abstract

The utility model discloses a material screening device which comprises a material groove, a middle hole staggered gate valve, a flexible connector, a chain and a vibrating screen, and the middle hole staggered gate valve is assembled between the material groove and the vibrating screen. The top of a valve seat of the middle hole dislocation gate valve is fixedly connected with a discharge port of the trough, the bottom is fixedly connected with one end of the flexible connector, and the other end of the flexible connector is fixedly connected with the vibrating screen. The fixed inserting plate is fixed to the end, away from the valve frame, of the valve seat, an inserting groove is formed in the side edge, connected with the valve frame, of the valve seat, the movable inserting plate is inserted into the inserting groove, and the fixed inserting plate and the movable inserting plate are arranged in an up-down staggered mode. And semi-elliptical holes are formed in the middle parts of the fixed insertion plate and the movable insertion plate. A push rod of the electric hydraulic rod is inserted into the through hole and fixedly connected with the movable insertion plate. A hanging beam is arranged in the middle of the trough, a hanging pile is arranged on the side wall of the vibrating screen, the chain is hung in the semi-elliptical hole, and the two ends of the chain are connected with the hanging beam and the hanging pile respectively. The device is low in energy consumption, and materials are not easy to block.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine metallurgy, in particular to a material screening device. Background Art

[0002] In the production and operation process of metallurgy and coal mining, it is often necessary to screen the block or powder materials through screening devices to achieve the purpose of particle size classification.

[0003] When screening materials in existing screening devices, it is usually necessary to set a feeding device between the material storage trough and the vibrating screen to control the feeding amount and the shut-down control of the material supply. The feeding devices in the prior art include drag belt conveyors, vibrating feeders, and impeller feeders. Different feeding devices can be selected to complete the vibrating screen feeding according to different material characteristics.

[0004] However, in the existing feeding equipment, the dragging belt conveyor has a complex structure, and hard debris can easily cause the belt to tear; the vibrating feeder has a loud running noise and is prone to dust; the impeller feeder has strict requirements on materials, and materials with large particle size or slag and foreign matter can easily cause the impeller to get stuck, and materials with excessive moisture or viscosity can easily cause the impeller to get blocked. In addition, the energy consumption of the existing feeding equipment for continuous operation is relatively high. As a result, the existing screening devices are prone to dust, easy to get blocked, and high energy consumption. Utility Model Content

[0005] Based on this, a material screening device is provided to solve the technical problems in the prior art that the screening device is prone to generate dust, is prone to blockage and has high energy consumption.

[0006] The utility model provides a material screening device, comprising a material trough, a center hole staggered plug valve, a flexible connection, a chain and a vibrating screen, wherein the center hole staggered plug valve is assembled between the material trough and the vibrating screen;

[0007] The center hole offset plug valve includes a valve seat, a valve frame, a fixed plug plate, a movable plug plate and an electric hydraulic rod. The valve seat and the valve frame are located in the same plane and are connected as one piece. The top of the valve seat is fixedly connected to the discharge port of the material trough, the bottom of the valve seat is fixedly connected to one end of the soft connection, and the other end of the soft connection is fixedly connected to the inlet of the vibrating screen.

[0008] The fixed plug plate is located inside the valve seat, and is fixed to one end of the valve seat away from the valve frame. A slot is provided on the side where the valve seat and the valve frame are connected, and the slot is parallel to the plane where the valve seat is located. The movable plug plate is inserted into the slot, and the fixed plug plate and the movable plug plate are arranged alternately up and down;

[0009] A semi-elliptical hole is provided on one side of the fixed plug plate close to the movable plug plate and in the middle of one side of the movable plug plate close to the fixed plug plate;

[0010] The electric hydraulic rod is fixedly connected to the side of the valve frame away from the valve seat, the side of the valve frame away from the valve seat is provided with a through hole, the push rod of the electric hydraulic rod is inserted into the through hole, and the push rod is fixedly connected to the movable plug plate;

[0011] A hanging beam is arranged in the middle of the material trough, a hanging pile is arranged on the side wall of the vibrating screen, a chain is hung in the semi-elliptical hole, one end of the chain is connected to the hanging beam, and the other end of the chain is connected to the hanging pile.

[0012] In one of the embodiments, both ends of the hanging beam are fixedly connected to the inner wall of the trough, and the distance from the hanging beam to the discharge port of the trough is 1m to 1.5m.

[0013] In one embodiment, the hanging beam is provided with an upper hanging ring, the hanging pile is provided with a lower hanging ring, one end of the chain is connected to the upper hanging ring, and the other end of the chain is connected to the lower hanging ring.

[0014] In one embodiment, the length of the chain is greater than the distance between the upper hanging ring and the lower hanging ring.

[0015] The beneficial effects of the utility model are:

[0016] (1) When the material trough of the utility model feeds the vibrating screen, the material passes through the middle hole formed by the vertical displacement between the fixed plug plate and the movable plug plate in the middle hole offset plug plate valve, and the material point is stable and will not shift. In addition, the size of the hole can be adjusted by the electric hydraulic rod to achieve the size and shutdown of the material flow;

[0017] (2) The utility model uses a chain to connect the vibrating screen and the material trough, and uses the mechanical energy generated by the vibration of the vibrating screen to drive the chain to vibrate to drive the material trough to vibrate, which can ensure the uniformity and continuity of the material flow and avoid material blockage;

[0018] (3) The utility model has a closed connection between the material trough and the vibrating screen, which will not generate dust;

[0019] (4) The material screening device of the utility model, as a feeding device, has a center hole offset gate valve that only needs to be started briefly when adjusting the flow rate during use, and has low energy consumption, thereby reducing the energy consumption of the entire material screening device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a material screening device provided in an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the chain assembly structure of the material screening device provided in the embodiment of the utility model;

[0022] Figure 3 One of the partial cross-sectional schematic diagrams of the center hole offset plug-in valve provided by the embodiment of the utility model;

[0023] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0024] Figure 5 A schematic top view of the structure of a center hole offset plug valve provided in an embodiment of the utility model.

[0025] Explanation of the reference numerals in the accompanying drawings: 1. material trough; 2. center hole offset plug valve; 21. valve seat; 22. valve frame; 23. fixed plug plate; 24. movable plug plate; 25. electric hydraulic rod; 26. slot; 27. semi-elliptical hole; 3. flexible connection; 4. vibrating screen; 5. chain; 6. hanging beam; 7. hanging pile; 8. upper hanging ring; 9. lower hanging ring. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0027] It should be noted that in the description of the present invention, “upper”, “lower”, “top”, “bottom”, orientation or position relationship is based on the attached Figure 1 Regarding the orientation or positional relationship shown, it should be understood that these orientation terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In one embodiment, Figure 1 and Figure 2 As shown, the material screening device of this embodiment includes a material trough 1, a center hole offset gate valve 2, a flexible connection 3, a chain 5 and a vibrating screen 4, and the center hole offset gate valve 2 is assembled between the material trough 1 and the vibrating screen 4.

[0029] The height of the center hole offset gate valve 2 of this embodiment is generally between 100 mm and 200 mm depending on the size of the material tank 1 and the vibrating screen 4 .

[0030] like Figure 3 , Figure 4 and Figure 5 As shown, the center-hole offset plug valve 2 includes a valve seat 21, a valve frame 22, a fixed plug plate 23, a movable plug plate 24 and an electric hydraulic rod 25. The valve seat 21 and the valve frame 22 are located in the same plane and are integrally connected. The top of the valve seat 21 is fixedly connected to the discharge port of the material trough 1, the bottom of the valve seat 21 is fixedly connected to one end of the soft connection 3, and the other end of the soft connection 3 is fixedly connected to the inlet of the vibrating screen 4.

[0031] Specifically, the horizontal cross-section of the valve seat 21 of the center hole offset gate valve 2 of this embodiment is consistent with the size of the discharge port of the trough 1, and the flexible connection 3 can ensure the airtight connection between the center hole offset gate valve 2 and the vibrating screen 4. The material is closed from the trough 1 to the discharge port to the vibrating screen 4, and no dust problem will be generated during material screening.

[0032] The fixed plug plate 23 is located inside the valve seat 21. The fixed plug plate 23 is fixed to one end of the valve seat 21 away from the valve frame 22. A slot 26 is provided on the side where the valve seat 21 and the valve frame 22 are connected. The slot 26 is parallel to the plane where the valve seat 21 is located. The movable plug plate 24 is inserted into the slot 26. The fixed plug plate 23 and the movable plug plate 24 are staggered up and down.

[0033] Specifically, three sides of the fixed plug plate 23 are welded to the valve seat 21. The fixed plug plate 23 and the movable plug plate 24 are staggered vertically, that is, the plane where the fixed plug plate 23 and the plane where the movable plug plate 24 are located are not coplanar, and there is a certain distance between the fixed plug plate 23 and the horizontal plug plate, so that the two plug plates can slide relative to each other.

[0034] A semi-elliptical hole 27 is provided on one side of the fixed plug plate 23 close to the movable plug plate 24 and in the middle of one side of the movable plug plate 24 close to the fixed plug plate 23; the electric hydraulic rod 25 is fixedly connected to the side of the valve frame 22 away from the valve seat 21, and a through hole is provided on the side of the valve frame 22 away from the valve seat 21, and a push rod of the electric hydraulic rod 25 is inserted into the through hole, and the push rod is fixedly connected to the movable plug plate 24.

[0035] In this embodiment, the movable plug plate 24 is inserted into the slot 26 and can slide left and right along the slot 26, so as to adjust the flow rate of the center hole offset plug plate valve 2, and the semi-elliptical hole 27 can ensure that the feeding point is stable and not easy to deviate. The push rod needs to be parallel to the sliding direction of the movable plug plate 24 to easily drive the movable plug plate 24 to slide.

[0036] The fixed plug plate 23 and the movable plug plate 24 are arranged alternately up and down to ensure that the middle hole is completely sealed and the flow is shut off.

[0037] A hanging beam 6 is provided in the middle of the trough 1 , a hanging pile 7 is provided on the side wall of the vibrating screen 4 , a chain 5 is suspended in the semi-elliptical hole 27 , one end of the chain 5 is connected to the hanging beam 6 , and the other end of the chain 5 is connected to the hanging pile 7 .

[0038] In this embodiment, the hanging beam 6 and the hanging ring are used to hang the chain 5. The chain 5 is installed inside the trough 1 and the vibrating screen 4, and is wrapped in the material to run, and almost no noise is made. The electric hydraulic push rod also makes almost no noise when it moves, reducing the use noise of the entire device.

[0039] Specifically, the chain 5 can be used to connect the vibrating screen 4 and the material trough 1, and the mechanical energy generated by the vibration of the vibrating screen 4 can be used to drive the material trough 1 to vibrate, thereby ensuring the continuity of the material flow and avoiding material blockage.

[0040] In one embodiment, both ends of the hanging beam 6 are fixedly connected to the inner wall of the trough 1, and the distance from the hanging beam 6 to the discharge port of the trough 1 is 1m to 1.5m.

[0041] Specifically, the hanging beam 6 is made of "I" steel or "channel" steel and the two ends are welded to the inner wall of the trough 1. The hanging pile 7 is also made of "I" steel or "channel" steel and welded to the inner wall of the vibrating screen 4.

[0042] In one embodiment, the hanging beam 6 is provided with an upper hanging ring 8, the hanging pile 7 is provided with a lower hanging ring 9, one end of the chain 5 is connected to the upper hanging ring 8, and the other end of the chain 5 is connected to the lower hanging ring 9. The upper hanging ring 8 and the lower hanging ring 9 are made of round steel and welded to the hanging beam 6 or the hanging pile 7, and are the links connecting the hanging beam 6 or the hanging pile 7 and the chain 5.

[0043] In one embodiment, the length of the chain 5 is greater than the distance between the upper hanging ring 8 and the lower hanging ring 9.

[0044] It should be noted that the length of the chain 5 is greater than the distance between the upper and lower hanging rings 9, but it is not easy to sag too long and touch the screen plate.

[0045] When the material screening device of this embodiment is in use, the material passes through the material trough 1, the middle hole offset gate valve 2 and the vibrating screen 4 at one time. During the operation of the vibrating screen 4, the screen body drives the hanging pile 7 to vibrate together, and the hanging pile 7 then drives the chain 5 to shake. When the material passes through the middle hole of the middle hole offset gate valve 2, it is continuously subjected to the shaking mechanical energy applied by the chain 5, ensuring that the flow rate of the material is stable during the downward process, and will not fluctuate or even be interrupted. The middle hole formed by the vertical displacement of the fixed gate 23 and the movable gate 24 of the middle hole offset gate valve 2 is the channel for the flow of materials. The movable gate 24 is moved left and right by the electric hydraulic rod 25, and the cross-sectional area of ​​the middle hole can be continuously changed in the range of 0 to the maximum value to realize the control of the material flow size and shutdown.

[0046] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the attached claims.

Claims

1. A material screening device, characterized in that: It comprises a material trough (1), a center hole offset plate valve (2), a flexible connection (3), a chain (5) and a vibrating screen (4), wherein the center hole offset plate valve (2) is assembled between the material trough (1) and the vibrating screen (4); The center hole offset plug valve (2) comprises a valve seat (21), a valve frame (22), a fixed plug plate (23), a movable plug plate (24) and an electric hydraulic rod (25); the valve seat (21) and the valve frame (22) are located in the same plane and are integrally connected; the top of the valve seat (21) is fixedly connected to the discharge port of the material trough (1); the bottom of the valve seat (21) is fixedly connected to one end of a flexible connection (3); and the other end of the flexible connection (3) is fixedly connected to the inlet of the vibrating screen (4); The fixed plug plate (23) is located inside the valve seat (21), and the fixed plug plate (23) is fixed to one end of the valve seat (21) away from the valve frame (22). A slot (26) is provided on the side where the valve seat (21) and the valve frame (22) are connected, and the slot (26) is parallel to the plane where the valve seat (21) is located. The movable plug plate (24) is inserted into the slot (26), and the fixed plug plate (23) and the movable plug plate (24) are arranged alternately up and down; A semi-elliptical hole (27) is provided on one side of the fixed plug plate (23) close to the movable plug plate (24) and in the middle of one side of the movable plug plate (24) close to the fixed plug plate (23); The electric hydraulic rod (25) is fixedly connected to the side of the valve frame (22) away from the valve seat (21), and the side of the valve frame (22) away from the valve seat (21) is provided with a through hole, and the push rod of the electric hydraulic rod (25) is inserted into the through hole, and the push rod is fixedly connected to the movable plug plate (24); A hanging beam (6) is provided in the middle of the material trough (1), a hanging pile (7) is provided on the side wall of the vibrating screen (4), the chain (5) is suspended in the semi-elliptical hole (27), one end of the chain (5) is connected to the hanging beam (6), and the other end of the chain (5) is connected to the hanging pile (7).

2. A material screening device according to claim 1, characterized in that: The two ends of the hanging beam (6) are respectively fixedly connected to the inner wall of the material trough (1), and the distance from the hanging beam (6) to the material outlet of the material trough (1) is 1m to 1.5m.

3. A material screening device according to claim 2, characterized in that: The hanging beam (6) is provided with an upper hanging ring (8), the hanging pile (7) is provided with a lower hanging ring (9), one end of the chain (5) is connected to the upper hanging ring (8), and the other end of the chain (5) is connected to the lower hanging ring (9).

4. A material screening device according to claim 3, characterized in that: The length of the chain (5) is greater than the distance between the upper hanging ring (8) and the lower hanging ring (9).

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