Self-tightening valve for material passing chute in aluminum oxide production

Abstract

A self-tightening valve for a material passing chute in aluminum oxide production relates to the technical field of aluminum oxide production, the valve is arranged at the high-position end of the material passing chute and comprises a valve body and a valve plate, a cross beam is arranged above the material passing chute, the valve body is fixedly connected with the cross beam, the upper portion of the valve plate is hinged to the upper portion of the valve body, and the lower portion of the valve plate is hinged to the upper portion of the valve body. A lifting lug used for being connected with a traction rope is fixedly arranged on the valve plate, the traction rope is connected with a traction device, a sealing plate is arranged on the valve body, a sealing gasket is arranged on the valve plate, the sealing plate and the sealing gasket are correspondingly arranged at the joint of the valve body and the valve plate, and the vertical bottom of the valve inclines towards the liquid input end. According to the invention, the gate valve is arranged at the end part of the chute in the upper-stage seed precipitation tank, the gate valve is scoured by utilizing rotational flow liquid in the seed precipitation tank, scabs are reduced, and meanwhile, the gate valve is pulled to open and close by adopting the pulling rope, so that the valve is easy to open and close.

Description

Technical Field

[0001] This invention relates to the field of alumina production technology, and in particular to a self-tightening valve for a material chute used in alumina production. Background Technology

[0002] In existing alumina seed processing production lines, material is transferred between seed tanks via chutes using the elevation difference. During daily production, cleaning of the seed tanks requires cutting off the feed to the previous tank. This process relies on gate valves mounted on the chutes. These gate valves are rigid valve plates, typically vertically positioned above the mixing tank, cutting off fluid flow in the middle of the chutes. Due to the properties of the seed slurry, sedimentation and scaling easily occur in the stagnant "dead zones." Consequently, scaling around the gate valves in the chutes is severe, preventing normal opening. Manual cleaning of the scaling before use is extremely difficult, wasting time and increasing labor costs. Furthermore, the gate valves themselves require screw lifting; when scaling forms, opening and closing becomes difficult, resulting in long operation times. Additionally, the gate valves themselves have poor sealing, leading to leakage after closure. Summary of the Invention

[0003] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a self-tightening valve for a material chute in alumina production. By setting the gate valve at the end of the chute located in the upper seed tank, the gate valve is flushed by the swirling liquid in the seed tank to reduce scaling. At the same time, the gate valve is opened and closed by a traction rope, making the valve easy to open and close.

[0004] To achieve the above objectives, the main technical solutions adopted by the present invention include: A self-tightening valve for a material chute in alumina production is disclosed. The material chute is connected to a seed distribution tank for alumina production at both ends, with the higher end of the material chute located inside the seed distribution tank. The valve is located at the higher end of the material chute and includes a valve body and a valve plate. A crossbeam is provided above the material chute, and the valve body is fixedly connected to the crossbeam. The upper part of the valve plate is hinged to the upper part of the valve body. A lifting lug for connecting to a traction rope is fixedly provided on the valve plate, and the traction rope is connected to a traction device. A sealing plate and a sealing gasket are provided on the valve body and the valve plate, respectively, and are correspondingly located at the joint between the valve body and the valve plate. The bottom of the valve is inclined vertically towards the liquid input end.

[0005] Furthermore, it also includes a fixed bracket fixedly installed on the seed trough cover plate, and the traction rope is slidably connected to the fixed bracket to facilitate the traction of the valve plate.

[0006] Furthermore, a support lug is fixedly provided on the upper part of the valve body, and a connector is fixedly provided on the upper part of the valve plate. The other end of the connector is hinged to the support lug by a pin to realize the opening and closing of the valve plate.

[0007] Furthermore, the valve has a vertical tilt angle of 5° to 20° with the vertical direction. When the traction rope is loosened, the valve plate can be self-locked by its own weight and the static pressure of the liquid column of fluid in the tank to press the sealing gasket.

[0008] Furthermore, the traction device includes pulleys and a hoist to facilitate the hoisting of the valve plate.

[0009] The beneficial effects of this invention are: 1. This invention sets the valve to open and close at an angle, and uses a traction rope and traction device to pull the valve plate to open and close, making the valve plate easier to open and close, and enabling rapid material cutting.

[0010] 2. In this invention, the valve is designed to be inclined at the bottom towards the liquid input end. When the traction rope is loosened, the valve plate can be self-locked by its own weight and the static pressure of the liquid column in the tank to press the sealing gasket.

[0011] 3. By placing the valve in the upper-level seeding tank, the present invention utilizes the stirred slurry in the seeding tank to flush the valve, significantly reducing valve body scaling, eliminating the need for manual cleaning, and reducing maintenance costs.

[0012] 4. This invention achieves sealing when the valve plate is closed by setting a sealing plate and a sealing gasket at the joint between the valve plate and the valve body, which better cuts off the upstream liquid in the material chute. At the same time, the sealing gasket at the joint between the two achieves soft contact, which is beneficial to remove a small amount of scale at the joint by vibration during the opening and closing of the valve. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a self-tightening valve for a material chute in alumina production, as described in this invention.

[0014] In the diagram: 1 is the traction rope, 2 is the fixed bracket, 3 is the lifting lug, 4 is the valve plate, 5 is the connector, 6 is the pin, 7 is the support lug, 8 is the material chute, 9 is the valve body, 10 is the sealing plate, and 11 is the sealing gasket. Detailed Implementation

[0015] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] This invention provides a self-tightening valve for a material chute in alumina production, such as... Figure 1As shown, the two ends of the material chute 8 are connected to the seed tanks used in alumina production. The material chute connects different seed tanks, and the material passes between the tanks through the height difference. In this invention, the higher end of the material chute 8 is located inside the seed tank, and the valve is located at the higher end of the material chute 8. Since the liquid inside the seed tank has a rotational speed due to stirring, the valve can effectively reduce or prevent "scaling" at the sealing plate by utilizing the flushing effect of the stirring fluid inside the seed tank. This reduces or avoids situations where the valve is not sealed tightly when closed and is stuck due to "scaling" when opened.

[0017] The valve includes a valve body 9 and a valve plate 4. Specifically, the valve body 9 can be a U-shaped frame. A crossbeam is provided above the material chute 8. The valve body 9 is fixedly connected to the crossbeam at its top or bottom. Part of the valve body 9 is placed inside the material chute 8, and its width matches the width of the material chute 8. The valve plate 4 is hinged to the valve body 9 at its top or bottom. A lifting lug 3 is fixedly provided on the valve plate 4 for connecting to a traction rope 1. The traction rope 1 is connected to the lifting lug 3 and to a traction device. Specifically, it also includes a fixed bracket 2 fixedly installed on the seed trough cover plate, and the traction rope 1 is slidably connected to the fixed bracket 2. Specifically, a support lug 7 is fixedly provided above the valve body 9, and a connecting piece 5 is fixedly provided above the valve plate 4. The other end of the connecting piece 5 is hinged to the support lug 7 using a pin 6. The traction device includes pulleys and a hoist, such as a manual or electric hoist. The traction device drives the valve plate 4 to open and close, with the valve plate 4 opening towards the water inlet side of the valve. In this invention, the valve plate 4 is hinged to the valve body 9, and the valve plate 4 is opened and closed by a traction rope. Compared with the existing screw gate valve opening method, the valve plate 4 of this invention is more convenient and labor-saving to open.

[0018] A sealing plate 10 is provided on the valve body 9, and a sealing gasket 11 is provided on the valve plate 4. The sealing gasket 11 is a soft sealing gasket. The sealing plate 10 and the sealing gasket 11 are respectively arranged at the joint between the valve body 9 and the valve plate 4. This invention achieves a seal when the valve plate is closed by setting a sealing plate and a sealing gasket at the joint between the valve plate 4 and the valve body 9, which better cuts off the upstream liquid in the chute. At the same time, the sealing gasket at the joint achieves soft contact, which is beneficial to remove a small amount of scale at the joint through vibration during the opening and closing of the valve.

[0019] The valve of the present invention is inclined at its vertical bottom towards the liquid input end. Specifically, the vertical inclination angle of the valve is 5° to 20° with the vertical direction. When the traction rope is loosened, the valve plate can be self-locked by its own weight and the static pressure of the liquid column of fluid in the tank to press the sealing gasket.

[0020] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any modifications, alterations, substitutions, and variations made by those skilled in the art to the above embodiments are within the scope of the present invention.

Claims

1. A self-tightening valve for a feed chute in alumina production, the feed chute (8) being connected at both ends to seed tanks for alumina production, characterized in that: The high end of the material passing chute (8) is arranged in the seed separating groove, the valve is arranged at the high end of the material passing chute (8), the valve comprises a valve body (9) and a valve plate (4), a cross beam is arranged above the material passing chute (8), the valve body (9) is fixedly connected with the cross beam, the valve plate (4) is hingedly connected with the upper portion of the valve body (9), a lifting lug (3) for being connected with a traction rope (1) is fixedly arranged on the valve plate (4), the traction rope (1) is connected with a traction device, a sealing plate (10) is arranged on the valve body (9), a sealing gasket (11) is arranged on the valve plate (4), the sealing plate (10) and the sealing gasket (11) are correspondingly arranged at the joint between the valve body (9) and the valve plate (4), and the valve is vertically and obliquely arranged towards the liquid input end.

2. A self-tightening valve for use in a flash tank in alumina production according to claim 1, characterized in that: A fixed support (2) fixedly arranged on the cover plate of the seed separating groove is further included, and the traction rope (1) is slidably connected with the fixed support (2).

3. The self-tightening valve for use in a flash tank in alumina production according to claim 1, characterized in that: A supporting lug (7) is fixedly arranged on the upper portion of the valve body (9), and a connecting piece (5) is fixedly arranged on the upper portion of the valve plate (4), and the other end of the connecting piece (5) is hingedly connected with the supporting lug (7) through a pin shaft (6).

4. The self-tightening valve for use in a flash tank in alumina production according to claim 1, characterized in that: The vertical inclination angle of the valve is 5°-20° with the vertical direction.

5. The self-tightening valve for use in a flash tank in alumina production according to claim 1, characterized in that: The traction device comprises a pulley and a hoist.

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