Roller hole sealing anti-overflow device for roller kiln

Abstract

The utility model discloses a roller hole sealing anti-overflow device for a roller kiln, which solves the problems that a kiln body frame and an outer decorative plate are corroded, the working environment is polluted, a metal frame at the top of a factory building is corroded and the like due to the overflow of acid-base volatile gas in the original part of the roller kiln. The device is characterized in that the sealing protection covers are arranged at the two ends of the roller bars (1) mounted on the two sides of each section of kiln wall, and the gas inlet pipeline joints (6) connected with the protective gas pipeline are arranged on the sealing protection covers for introducing nitrogen, so that the positive pressure in the covers is ensured to balance the pressure difference between the inside and the outside of the furnace, and the overflow of acid gas is reduced. The device has the advantages of being reasonable in structure, easy to operate, safe in operation, stable in atmosphere and the like, and can be applied to environments which have high requirements on the sealing performance of the roller kiln and need to strictly limit atmosphere overflow or inward movement or have strict requirements on environmental assessment.

Description

Technical Field

[0001] The utility model belongs to the field of thermal equipment, in particular to a roller hole sealing and overflow prevention device for a roller kiln. Background Art

[0002] The roller holes of existing roller kilns are generally built with roller hole bricks + caulking loose cotton. Since the rollers need to rotate continuously, the rollers cannot be completely sealed around them. After being roasted in the roller kiln, some materials will produce acidic or alkaline harmful corrosive gases. In the positive pressure zone, the above corrosive gases will overflow from the roller holes, which will not only cause corrosion of the kiln frame and exterior panels, pollute the working environment, but also corrode the metal roof of the factory building, causing significant economic losses to the production enterprises. Summary of the invention

[0003] The utility model aims to provide a roller kiln roller hole sealing and overflow prevention device for the market, which has reasonable structure, simple operation, safe operation, stable atmosphere and can prevent the corrosive gas in the furnace from overflowing.

[0004] The technical scheme of the utility model is: it includes a kiln body steel structure, a kiln wall, a kiln top, a kiln bottom, a roller, an active transmission mechanism, a passive transmission mechanism heating device and an automatic control device, etc., and sealing protection covers are set at both ends of the rollers installed on both sides of each kiln wall. The sealing protection cover includes an active side sealing protection cover and a passive side sealing protection cover. The active side sealing protection cover is tightly connected with the kiln wall active side panel of the kiln body steel structure, and a detachable inspection / observation window and an air intake pipe joint connected to the protective gas pipeline are set on the cover body. The transmission shaft of the active transmission mechanism passes through the sealing bearing set on the side wall of the sealing protection cover and is connected to the end of the roller passing through the kiln wall in the kiln through a coupling. The sealing bearing has two layers of lip sealing rings built in. The passive side sealing protection cover is tightly connected with the kiln wall passive side panel of the kiln body steel structure, and a detachable inspection / observation window and an air intake pipe joint connected to the protective gas pipeline are set on the cover body, and a sealing flange is set on the outer side. At the same time, in order to ensure the balance of the air pressure in the sealing cover and the air pressure in the furnace, a manual switch valve and a gas volume fine-tuning valve are installed on the protective gas pipeline.

[0005] The beneficial effects of the utility model are as follows: after a positive pressure sealing cover is added to the outer side of the roller hole of the roller kiln, the air tightness of the roller kiln itself is significantly improved, and corrosive gases in the positive pressure area are prevented from overflowing from the roller holes and then corroding the roller kiln furnace equipment, thereby ensuring the reliability and life of the roller kiln equipment; at the same time, corrosive gases are prevented from overflowing and polluting the workshop environment and corroding the workshop roof, meeting the process requirements for atmosphere or the need to prevent overflow, and the processing precision requirements are not high, and it has the advantages of reasonable structure, simple operation, safe operation, stable atmosphere, etc. It can be used in environments with high requirements for the sealing performance of the roller kiln, where it is necessary to strictly limit the overflow or internal leakage of the atmosphere, or in environments with strict environmental impact assessment requirements. Its promotion and application will bring good economic and social benefits to enterprises.

[0006] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the main structure of the sealing cover of the utility model in the installed state;

[0008] Figure 2 This is a schematic diagram of the main structure of the active side transmission mechanism of the utility model;

[0009] Figure 3 This is a schematic diagram of the main structure of the passive side transmission mechanism of the utility model;

[0010] Figure 4 This is a schematic diagram of the cross-sectional structure of the sealed bearing of the utility model;

[0011] Figure 5 It is a schematic diagram of the top view of the sealing cover of the utility model.

[0012] In the figure: 1 is a roller, 2 is an active side seal protection cover, 3 is a passive side seal protection cover, 4 is an active transmission mechanism, 5 is a passive transmission mechanism, 6 is an intake pipe joint, 7 is a detachable maintenance / observation window, 8 is a sealing flange, 9 is a sealing bearing, 10 is a lip seal ring, and 11 is a transmission shaft. Implementation

[0013] like Figure 1As shown, the roller hole sealing and overflow prevention device of the roller kiln includes a kiln steel structure, a kiln wall, a kiln top, a kiln bottom, a roller rod 1, an active transmission mechanism 4, a passive transmission mechanism 5, a heating device and an automatic control device, etc. The roller rods 1 are installed on both sides of each kiln wall, and sealing protection covers are set at both ends. The active side sealing protection cover 2 is tightly connected with the active side panel of the kiln wall of the kiln steel structure, and a detachable inspection / observation window and an air intake pipe joint connected to the protective gas pipeline are set on the cover body. The transmission shaft 11 of the active transmission mechanism 4 passes through the sealing bearing 9 set on the side wall of the sealing protection cover 3 and is connected to the end of the roller rod passing through the kiln wall in the kiln through a coupling. The sealing bearing 9 has two layers of lip sealing rings 10 built in. The passive side sealing protection cover 3 is tightly connected with the passive side panel of the kiln wall of the kiln steel structure, and a detachable inspection / observation window 7 and an air intake pipe joint 6 connected to the protective gas pipeline are set on the cover body, and a sealing flange 8 is set on the outer side. In order to ensure the balance between the air pressure in the sealing cover and the air pressure in the furnace, a manual switch valve and a gas volume fine-tuning valve are set on the protective gas pipeline. When implementing the utility model, the roller 1 rotates under the drive of the active side transmission mechanism 4. In order to ensure the effectiveness of the active side sealing protection cover 2 and not damage the roller, a sealing bearing 9 is installed at the opening of the side wall of the sealing protection cover. The sealing bearing has two layers of lip sealing rings (made of flexible polymer material, with spring-tightening accessories, and built-in spherical roller bearings). When installing, it is necessary to first install the roller passive transmission mechanism 5, and then insert the roller 1 into the roller hole in place. Then install the sealing bearing 9, and finally install the roller active transmission mechanism 4 in place. The active side sealing protection cover 2 and the passive side sealing protection cover 3 are generally considered to be integrated with the kiln body, which can reduce the seams that need to be sealed. In order to facilitate the observation of the operation of the roller and timely troubleshoot roller failures such as broken rollers and deviation, inspection ports, detachable observation windows 7 and sealing flanges 8 are provided on the upper part of the active side sealing protective cover 2, the upper part and the outer side of the passive side sealing protective cover 3 for observation and maintenance. The observation window is sealed with a closed-loop sealing gasket. If necessary, the observation window or the sealing flange can be removed in time and the broken roller can be taken out through the inspection port on the sealing protective cover. If it is necessary to improve the system sensitivity, a broken roller detection mechanism can be installed in the passive side sealing cover 3, which is linked to the alarm system to facilitate personnel to find roller failure problems in time. In addition, the sealing protective cover high-pressure protective gas inlet pipe joint 6 usually uses a quick connector, and each sealing cover is equipped with a joint to facilitate maintenance operations. The utility model has the advantages of reasonable structure, simple operation, safe operation, stable atmosphere, etc. Its promotion and application will bring good economic and social benefits to enterprises.

Claims

1. A roller hole sealing and overflow prevention device for a roller kiln, comprising a kiln steel structure, a kiln wall, a kiln top, a kiln bottom, a roller (1), an active transmission mechanism (4), a passive transmission mechanism (5), a heating device and an automatic control device, characterized in that: Both ends of the rollers (1) installed on both sides of each kiln wall are provided with sealing protection covers, and an air inlet pipe joint (6) connected to a protective gas pipe is provided on the sealing protection cover.

2. The roller hole sealing and overflow prevention device of the roller kiln according to claim 1 is characterized in that: The sealing protection cover comprises an active side sealing protection cover (2) and a passive side sealing protection cover (3), wherein the active side sealing protection cover (2) is hermetically connected to the active side panel of the kiln wall of the kiln body steel structure, a detachable inspection / observation window (7) and an air inlet pipe joint (6) connected to a protective gas pipeline are arranged on the cover body, and a transmission shaft (11) of an active transmission mechanism (4) passes through a sealing bearing (9) arranged on the side wall of the sealing protection cover (3) and is connected to the end of a roller rod passing through the kiln wall in the kiln through a coupling; the passive side sealing protection cover (3) is hermetically connected to the passive side panel of the kiln wall of the kiln body steel structure, a detachable inspection / observation window (7) and an air inlet pipe joint (6) connected to a protective gas pipeline are arranged on the cover body, and a sealing flange (8) is arranged on the outer side.

3. The roller hole sealing and overflow prevention device of the roller kiln according to claim 2 is characterized in that: The sealed bearing (9) has two layers of lip-shaped sealing rings (10) built into it.

4. The roller hole sealing and overflow prevention device of the roller kiln according to claim 3 is characterized in that: The protective gas pipeline is provided with a manual switch valve and a gas volume fine-tuning valve.

Images