Flexible and Rigid Double Sealing Double-layer Ash Discharge Valve

Abstract

The present invention belongs to the technical field of sintering production equipment in the metallurgical industry, and particularly relates to a rigid-flexible double-sealed double-layer ash discharge valve, which includes a valve body, a double-layer valve plate support arranged in the valve body, and a double-layer valve seat fixed on the valve body. It is characterized in that a valve plate is provided below each layer of valve seat, a rigid movable valve seat is provided between the upper and lower plates of each layer of valve seat, a limiting block is arranged inside each layer of valve seat and beside the rigid movable valve seat, a flexible seal is arranged outside each layer of valve seat and above the corresponding valve plate, and each layer of valve plate is hinged on the corresponding valve plate support. The present invention solves the sealing problem of the double-layer ash discharge valve. A rigid seal is formed between the rigid movable valve seat and the valve plate, and at the same time a flexible seal is formed between the flexible seal and the valve plate, forming a double seal with good sealing effect. The flexible seal is protected by the rigid movable valve seat, avoiding damage, being convenient for maintenance and repair, having strong reliability, and being easy to replace vulnerable parts.

Description

Technical Field

[0001] The present invention belongs to the technical field of sintering production equipment in the metallurgical industry, and particularly relates to a rigid-flexible double-sealed double-layer ash discharge valve. Background Art

[0002] When sintering production is carried out in the smelting industry, a device is needed to discharge the ore and ash in each dust reduction pipe during sintering production without forming air leakage, which is the double-layer ash discharge valve. The problems existing in the current double-layer ash discharge valve are as follows:

[0003] The general air leakage rate is high. Under the action of the negative pressure of the fan, dust and some particles rotate in the pipeline, wearing the pipeline and causing air leakage. The currently used double-layer ash discharge valves mainly include the knife-edge type and the electro-hydraulic push rod type. In the knife-edge type, there are often some small particles between the knife-edge of the valve seat and the valve plate, resulting in air leakage, and gradually causing wear of the valve plate and the valve seat, and a short service life. In the electro-hydraulic push rod type, some particles often enter the chute of the plug plate, interfering with the advancement of the valve plate, forming an air leakage port. Moreover, in the industrial and mining areas with a lot of dust on site, the hydraulic mechanism of the electro-hydraulic push rod is easily damaged and fails. Once foreign matters enter the chute of the electro-hydraulic push rod, the adjustment is very troublesome. The service lives of these two forms of double-layer valves are not long at present, the sealing effect is poor, and the air leakage is serious, which has an adverse impact on production organization. Summary of the Invention

[0004] The purpose of the present invention is to provide a rigid-flexible double-sealed double-layer ash discharge valve with a simple structure, good sealing performance, and good reliability.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A rigid-flexible double-sealed double-layer ash discharge valve of the present invention includes a valve body, a double-layer valve plate support arranged in the valve body, and a double-layer valve seat fixed on the valve body. It is characterized in that a valve plate is provided below each layer of valve seat, a rigid movable valve seat is arranged between the upper and lower two plates of each layer of valve seat, a limiting block is arranged in each layer of valve seat and beside the rigid movable valve seat, a flexible seal is arranged outside each layer of valve seat and above the corresponding valve plate, and each layer of valve plate is hinged on the corresponding valve plate support.

[0007] The rigid movable valve seat moves in its corresponding valve seat.

[0008] The flexible seal is a rubber seal.

[0009] Advantages of the Present Invention

[0010] (1) The rigid-flexible double-sealed double-layer ash discharge valve of the present invention completely solves the sealing problem of the double-layer ash discharge valve. A rigid seal is formed between the rigid movable valve seat and the valve plate, and a flexible seal is simultaneously formed between the flexible seal and the valve plate, forming a double seal with a good sealing effect;

[0011] (2) The rigid-flexible double-sealing double-layer ash discharge valve of the present invention solves the problem of the service life of the sealing member. When the valve plate is opened, the rigid movable valve seat falls by gravity, protecting the flexible sealing member from being scoured by the material; the flexible sealing member has good sealing effect and reduces the rigid movable valve seat from being scoured and worn by the material.

[0012] (3) The rigid-flexible double-sealing double-layer ash discharge valve of the present invention is more convenient for maintenance and repair. Only a few bolts need to be removed to solve the problem of maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the present invention.

[0014] Figure 2 It is a schematic structural diagram of the rigid seal and the flexible seal of the present invention.

[0015] Figure 3 It is a schematic structural diagram of the rigid movable valve seat of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following further describes the specific embodiments of the present invention with reference to the drawings.

[0017] As Figures 1-3 shown, a rigid-flexible double-sealing double-layer ash discharge valve includes a valve body 1, a double-layer valve plate support 3 arranged in the valve body 1, and a double-layer valve seat 5 fixed on the valve body 1. It is characterized in that a valve plate 4 is provided below each layer of valve seat 5, a rigid movable valve seat 6 is provided between the upper and lower plates of each layer of valve seat 5, a limit block 2 is provided in each layer of valve seat 5 and beside the rigid movable valve seat 6, a flexible sealing member 7 is provided outside each layer of valve seat 5 and above the corresponding valve plate 4, and each layer of valve plate 4 is hinged on the corresponding valve plate support 3.

[0018] The rigid movable valve seat 6 moves within its corresponding valve seat 5.

[0019] The flexible sealing member 7 is a rubber sealing member.

[0020] For the rigid-flexible double-sealed double-layer ash discharge valve of the present invention, taking one layer of the ash discharge valve as an example, the valve seat 5 is fixedly arranged on the valve body 1, the rigid movable valve seat 6 is arranged between two plates of the valve seat 5, the rigid movable valve seat 6 can move in the valve seat 5, and the limit block 2 arranged in the valve seat 5 limits the movement range of the rigid movable valve seat 6. The flexible seal 7 is fixedly arranged outside the valve seat 5. The valve plate 4 is movably hinged on the valve plate support 3 without being tightened and leaving an activity gap. When the valve plate 4 is sealed, a rigid seal is formed between the rigid movable valve seat 6 and the valve plate 4, and at the same time a flexible seal is formed between the flexible seal 7 and the valve plate 4 to form a double seal. When the valve plate 4 is opened, the rigid movable valve seat 6 falls by gravity, protecting the flexible seal 7 from being scoured by materials.

[0021] The rigid-flexible double-sealed double-layer ash discharge valve of the present invention completely solves the sealing problem of the double-layer ash discharge valve. A rigid seal is formed between the rigid movable valve seat 6 and the valve plate 4, and at the same time a flexible seal is formed between the flexible seal 7 and the valve plate 4 to form a double seal, with good sealing effect; it solves the service life problem of the seal. When the valve plate 4 is opened, the rigid movable valve seat 6 falls by gravity, protecting the flexible seal 7 from being scoured by materials; the flexible seal 7 has good sealing effect and also reduces the rigid movable valve seat 6 from being scoured and worn by materials; maintenance and repair are more convenient, and the problem can be solved by removing only a few bolts for repair and replacement.

Claims

1. A rigid-flexible double-sealed double-layer ash discharge valve, comprising a valve body, a double-layer valve plate support arranged in this valve body, and a double-layer valve seat fixed on the valve body, characterized in that A valve plate is provided below each layer of valve seats, a rigid movable valve seat is provided between the upper and lower plates of each layer of valve seats, a limiting block is provided in each layer of valve seats and beside the rigid movable valve seat, a flexible seal is provided outside each layer of valve seats and above the corresponding valve plate, and each valve plate is hinged to the corresponding valve plate support.

2. The rigid-flexible double-sealed double-layer ash discharge valve according to claim 1, characterized in that The rigid movable valve seat moves within its corresponding valve seat.

3. The rigid-flexible double-sealed double-layer ash discharge valve according to claim 1, characterized in that The flexible seal is a rubber seal.

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