Chain bucket elevator for conveying materials generating explosive dust

Abstract

The utility model discloses a chain bucket elevator for conveying materials generating explosive dust, which comprises an elevator casing formed by sequentially connecting a head casing, a middle casing and a tail casing, and a plurality of explosion venting mechanisms are arranged on the top of the head casing and on one side of the middle casing and the tail casing. The explosion venting mechanism comprises an angle steel flange, a flat steel flange, an explosion venting sheet, a frame body, an asbestosed wire gauze and a steel mesh plate, the flat steel flange is detachably and fixedly connected with the angle steel flange through a plurality of bolt pairs, the flat steel flange is arranged at one end of the frame body, the steel mesh plate is arranged at the other end of the frame body, and the asbestosed wire gauze is arranged on the inner side of the steel mesh plate; compared with the prior art, the explosion venting device has the advantages that the structure is simple, the production cost is low, and the weight is light.

Description

Technical Field

[0001] The utility model relates to the technical field of bulk material transportation, in particular to a chain bucket elevator used for conveying materials generating explosive dust. Background Art

[0002] Bucket elevator is a device for lifting and transporting materials from low to high places. It is mainly used for continuous vertical lifting of powdery, granular and small pieces of materials. Due to the continuous inflow and outflow of materials at the head and base, the dust concentration is high; there is severe friction between the conveyor belt and the head and tail wheels, between the main and driven shafts and the bearings, as well as internal friction of the materials, which makes the temperature inside the machine body high, and the internal seal of the bucket elevator shell is tight. Therefore, when the dust concentration, temperature and pressure in the bucket elevator reach a certain value, if the collision between the bucket and the shell produces sparks, it will cause a dust explosion in the bucket elevator. Usually, in order to protect the main part of the bucket elevator, an explosion relief joint will be placed at a suitable position of the overall equipment to release the pressure caused by the dust explosion. At present, the traditional flameless explosion relief device of the elevator consists of an explosion relief piece, an explosion-proof valve, a spark detection and extinguishing device, which can effectively prevent the explosion flame and provide a safe operating environment for production. However, its structure is complex, the production cost is high, and the weight is large. Summary of the invention

[0003] The purpose of the utility model is to solve the problems in the prior art and to provide a chain bucket elevator for conveying materials that generate explosive dust, which has a simple structure, low production cost and light weight.

[0004] To achieve the above-mentioned purpose, the utility model proposes a chain bucket elevator for conveying materials that generate explosive dust, including an elevator casing composed of a head shell, an intermediate shell and a tail shell connected together in sequence, a plurality of explosion relief mechanisms are provided on the top of the head shell and one side of the intermediate shell and the tail shell, the explosion relief mechanisms include an angle steel flange, a flat steel flange, an explosion relief piece, a frame, an asbestos mesh and a steel mesh plate, the flat steel flange is detachably fixedly connected to the angle steel flange by a plurality of bolt pairs, a flat steel flange is provided at one end of the frame, and a steel mesh plate is provided at the other end, an asbestos mesh is provided on the inner side of the steel mesh plate, and an explosion relief piece is clamped and fixed between the angle steel flange and the flat steel flange.

[0005] Preferably, the explosion venting sheet is a stainless steel sheet with a thickness of 1.5 mm.

[0006] Preferably, the steel mesh plate comprises a steel plate body and a mesh plate arranged in the middle of the steel plate body.

[0007] Preferably, the steel plate body is provided with a plurality of reinforcing ribs supported on the outer side of the mesh perforated plate.

[0008] Preferably, the reinforcing ribs are square steel or flat steel.

[0009] Preferably, both vertical sides of the angle steel flange on the intermediate shell extend longitudinally for a certain length.

[0010] The beneficial effects of the utility model are as follows: when the internal pressure of the casing is greater than the static opening pressure of 0.01Mpa, the explosion venting plate will be broken, and dust and flame will be sprayed onto the asbestos net, the dust will be collected, and the flame will be covered and extinguished, thereby preventing the explosion flame and dust from overflowing and providing a safe operating environment for production. Compared with the prior art, the utility model has a simple structure, low production cost and light weight.

[0011] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of a chain bucket elevator for conveying materials that generate explosive dust in the utility model;

[0013] Figure 2 It is a cross-sectional structural diagram of the explosion relief mechanism;

[0014] Figure 3 It is a schematic diagram of an explosion relief mechanism in which both vertical sides of an angle steel flange extend longitudinally by a certain length.

[0015] In the figure: 1-head shell, 2-middle shell, 3-tail shell, 4-explosion relief mechanism, 41-angle steel flange, 42-flat steel flange, 43-explosion relief plate, 44-frame, 45-asbestos mesh, 46-steel mesh plate, 47-bolt pair, 48-reinforcement rib, 461-steel plate body, 462-mesh perforated plate. DETAILED DESCRIPTION

[0016] See also Figure 1 , Figure 2 and Figure 3The utility model discloses a chain bucket elevator for conveying explosive dust materials, comprising an elevator casing composed of a head shell 1, an intermediate shell 2 and a tail shell 3 connected in sequence, a plurality of explosion relief mechanisms 4 are arranged on the top of the head shell 1 and one side of the intermediate shell 2 and the tail shell 3, the explosion relief mechanism 4 comprises an angle steel flange 41, a flat steel flange 42, an explosion relief sheet 43, a frame 44, an asbestos net 45 and a steel mesh plate 46, the flat steel flange 42 is detachably fixedly connected to the angle steel flange 41 by a plurality of bolt pairs 47, and one end of the frame 44 is provided with a flat steel flange 4 2, a steel mesh plate 46 is provided at the other end, an asbestos mesh 45 is provided on the inner side of the steel mesh plate 46, an explosion relief plate 43 is clamped and fixed between the angle steel flange 41 and the flat steel flange 42, and the explosion relief plate 43 is a stainless steel sheet with a thickness of 1.5 mm, the steel mesh plate 46 includes a steel plate body 461 and a mesh plate 462 provided in the middle of the steel plate body 461, a plurality of reinforcing ribs 48 supported on the outer side of the mesh plate 462 are provided on the steel plate body 461, and the reinforcing ribs 48 are square steel or flat steel, and the two vertical sides of the angle steel flange 41 on the intermediate shell 2 are longitudinally extended for a certain length.

[0017] Working process of this utility model:

[0018] The utility model discloses a chain bucket elevator for conveying materials generating explosive dust. During operation, when the internal pressure of the casing is greater than the static opening pressure of 0.01Mpa, the explosion relief plate 43 will be broken, and the dust and flame will be sprayed onto the asbestos net 45, the dust will be collected, and the flame will be covered and extinguished, thereby preventing the explosion flame and dust from overflowing and providing a safe operating environment for production. Compared with the prior art, the utility model has a simple structure, low production cost, light weight, and reduced requirements for casing support.

[0019] The two vertical sides of the angle steel flange 41 on the intermediate housing 2 are both extended longitudinally by a certain length in order to strengthen the supporting force of the housing.

[0020] Welding the angle steel flange 41 to the casing;

[0021] The flat steel flange 42 is welded and fixedly connected to one end of the frame 44;

[0022] Lay the explosion venting plate 43 on the angle steel flange 41, align the holes of the flat steel flange 42 and the angle steel flange 41, and fix them together with bolt pairs 47 to clamp the explosion venting plate 43 between the angle steel flange 41 and the flat steel flange 42;

[0023] A layer of asbestos mesh 45 is laid on the inner side of the steel mesh plate 46, and a mesh plate 462 is spot welded on the middle opening of the steel plate body 461;

[0024] Several square steels or flat steels are welded in the horizontal direction of the steel plate body 461 to reinforce the mesh perforated plate 462;

[0025] After the explosion occurs, the bolt pair 47 is unscrewed, the explosion relief piece 43 is replaced, and the explosion relief port is cleaned, and then the bolt pair 47 is tightened again and the device can be used again.

[0026] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A chain bucket elevator for conveying materials that generate explosive dust, characterized in that: The invention comprises a hoist casing composed of a head shell (1), an intermediate shell (2) and a tail shell (3) connected together in sequence. A plurality of explosion relief mechanisms (4) are provided on the top of the head shell (1) and one side of the intermediate shell (2) and the tail shell (3). The explosion relief mechanisms (4) comprise an angle steel flange (41), a flat steel flange (42), an explosion relief plate (43), a frame (44), an asbestos mesh (45) and a steel mesh plate (46). The flat steel flange (42) is detachably fixedly connected to the angle steel flange (41) by means of a plurality of bolt pairs (47). The frame (44) is provided with a flat steel flange (42) at one end and a steel mesh plate (46) at the other end. The inner side of the steel mesh plate (46) is provided with an asbestos mesh (45). An explosion relief plate (43) is clamped and fixedly fixed between the angle steel flange (41) and the flat steel flange (42).

2. A chain bucket elevator for conveying materials generating explosive dust as claimed in claim 1, characterized in that: The explosion relief sheet (43) is a stainless steel sheet with a thickness of 1.5 mm.

3. A chain bucket elevator for conveying materials generating explosive dust as claimed in claim 1, characterized in that: The steel mesh plate (46) comprises a steel plate body (461) and a mesh plate (462) arranged in the middle of the steel plate body (461).

4. A chain bucket elevator for conveying materials generating explosive dust as claimed in claim 3, characterized in that: The steel plate body (461) is provided with a plurality of reinforcing ribs (48) supported on the outer side of the mesh perforated plate (462).

5. A chain bucket elevator for conveying materials generating explosive dust as claimed in claim 4, characterized in that: The reinforcing rib (48) is square steel or flat steel.

6. A chain bucket elevator for conveying materials generating explosive dust according to any one of claims 1 to 5, characterized in that: The two vertical sides of the angle steel flange (41) on the intermediate housing (2) both extend longitudinally for a certain length.

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