Double-sealing device for discharging end of stepping bottom type furnace
By arranging dry seal and water seal devices at the discharge port of the stepping hearth furnace, the technical problems of high-temperature leakage of traditional stepping devices of sealing devices and traditional stepping devices of water seal devices in the prior art are solved. The technical application of dry seal and water seal devices solves the technical problems of traditional stepping devices of sealing devices in the prior art, and realizes the technical application at the discharge end of the stepping hearth furnace, which solves the technical problems of sealing devices in the prior art. The double sealing device combining dry seal and water seal is adopted, which solves the problems of high-temperature flue gas leakage of sealing devices and water seal cooling water turning into water vapor affecting heating quality in the prior art, and achieves high-efficiency, energy-saving and long-life sealing effect.
Patent Information
- Application Number
- CN202423095190.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-12-16
AI Technical Summary
The discharge end seal of the traditional walking hearth furnace has problems such as high-temperature flue gas leakage and water seal cooling water turning into water vapor, which affects the heating quality. In addition, the support seat is expensive and has a short lifespan.
A double sealing device combining dry seal and water seal is adopted, including a dry seal device consisting of a fixed discharge end wall, a flame baffle, a dry seal wall, a slag hopper and a flap valve; a water seal device consisting of a water seal groove and a water seal knife, and a water cooling pipe support beam and a stepping bottom support steel groove are arranged on the upper part of the discharge end of the stepping mechanism.
It effectively prevents high-temperature flue gas leakage, avoids water vapor from entering the furnace, reduces construction costs, extends service life, and improves heating quality and economic benefits.
Smart Images
Figure CN223425685U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of industrial thermal equipment, in particular to a double sealing device at the discharge end of a stepping hearth furnace. Background Art
[0002] Sealing the discharge end of traditional step-down furnaces has always been a problem. The step-down discharge device needs to move up, forward, down, and backward in a high-temperature furnace. A large gap needs to be left between the movable mechanism and the fixed furnace wall. A large amount of high-temperature flue gas overflows through the gap, causing equipment damage and wasting energy. To this end, people have designed various sealing methods. The traditional sealing method is to set a water seal groove at the bottom of the discharge end. The water seal knife installed in the step-down mechanism extends into the water seal groove, thereby preventing the overflow of flue gas. However, the cooling water in the water seal groove is in direct contact with the high-temperature flue gas in the furnace. The cooling water is heated and turned into water vapor, which continuously rises into the furnace and contacts the steel billet, causing the temperature near the tube billet to be low, which directly affects the heating quality of the tube billet. At the same time, the support seat of the traditional step-down mechanism that supports the steel billet in the furnace at the discharge end is a high-temperature and heat-resistant casting. It has a high cost, a short service life, and is not easy to replace. Utility Model Content
[0003] The purpose of the utility model is to provide the market with a double sealing device at the discharge end of a stepping hearth furnace with a reasonable structure, high efficiency and energy saving, low construction and maintenance costs, and a long service life.
[0004] The technical solution of the present utility model is as follows: it includes a stepping mechanism, a fixed discharge end wall, a cantilever discharge roller, a discharge gap, and a sealing device. The sealing device is a double sealing device consisting of a dry sealing device and a water sealing device. The dry sealing device is composed of a fixed discharge end wall, a flame baffle, a dry sealing wall, a slag receiving hopper, and a flap valve. The flame baffle is fixedly installed directly below the front end face of the stepping mechanism. The dry sealing wall surrounded by refractory materials is fixed to the fixed discharge end wall. A slag receiving hopper is provided between the fixed discharge end wall and the bottom of the dry sealing wall, and a flap valve is provided at the slag outlet of the slag receiving hopper. The water sealing device is composed of a water sealing groove and a water sealing knife. The water sealing groove is provided at the side and rear of the dry sealing wall. The water sealing knife is fixedly installed at the bottom of the stepping mechanism and placed in the cooling water in the water sealing groove, and can move back and forth.
[0005] Furthermore, a discharge support seat consisting of a water-cooling pipe support beam and a stepping bottom support steel trough is set on the upper part of the discharge end of the stepping mechanism. The water-cooling pipe support beam is fixedly installed on the discharge end frame of the stepping mechanism, and the stepping bottom support steel trough is installed on the upper part.
[0006] The beneficial effects of the present invention are as follows: a dry seal and water seal double sealing device is provided at the discharge end of the stepping bottom furnace. First, it can prevent the high-temperature flue gas at the discharge end from leaking out through the gap between the stepping mechanism and the discharge end wall; second, it prevents the cooling water in the water seal tank from directly contacting the high-temperature flue gas to form water vapor that rises into the furnace and reduces the temperature of the steel pipe; third, a water-cooling pipe support device is provided on the upper part of the stepping mechanism to support the steel pipe on the fixed bottom. This device has the characteristics of being simple and practical, having good use effect, low construction cost, and long service life; fourth, the dry seal and water seal double sealing devices are independently processed and manufactured, and the manufacturing cost is also relatively economical and reasonable. It has the advantages of reasonable structure, high efficiency and energy saving, low construction and maintenance cost, and long service life. Its promotion and application will bring good economic benefits to production enterprises.
[0007] The present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a schematic diagram of the longitudinal cross-section structure of the utility model.
[0009] In the figure: 1 is the water-cooling pipe support beam, 2 is the discharging cantilever roller, 3 is the stepping bottom support steel trough, 4 is the fixed tooth, 5 is the steel pipe, 6 is the discharging gap, 7 is the stepping mechanism, 8 is the discharging fixed end wall, 9 is the flame baffle, 10 is the dry seal wall, 11 is the slag receiving hopper, 12 is the water seal trough, 13 is the water seal knife, and 14 is the flap valve. DETAILED DESCRIPTION
[0010] like Figure 1As shown, a dual sealing device at the discharge end of a stepping hearth furnace is composed of a fixed discharge end wall 8 of the stepping hearth furnace, a stepping mechanism 7, a discharge cantilever roller 2, a discharge gap 6, and a sealing device. The sealing device, which combines dry seals and water seals, can effectively prevent high-temperature flue gas in the furnace from overflowing through the discharge gap 6 between the stepping mechanism 7 and the fixed discharge end wall 8. It can also prevent water vapor generated by direct contact between the cooling water in the water seal tank and the high-temperature flue gas from rising into the furnace to cool the steel pipes and affect the heating quality of the steel pipes. The dry sealing device is composed of the fixed discharge end wall 8, a flame muffle plate 9, a dry sealing wall 10, a slag hopper 11, and a flap valve 14. The flame muffle plate 9 is fixedly installed directly below the front end face of the stepping mechanism 7. The dry sealing wall 10, which is surrounded by refractory material, is fixed to the fixed discharge end wall 8. A slag hopper 11 is provided between the fixed discharge end wall 8 and the bottom of the dry sealing wall 10, and a flap valve 14 is provided at the slag outlet of the slag hopper 11. The water seal device is composed of a water seal groove 12 and a water seal knife 13. The water seal groove 12 is set behind the dry seal wall 10. The water seal knife 13 is fixedly installed at the bottom of the stepping mechanism 7 and placed in the cooling water in the water seal groove (12), and can move freely left and right. At the same time, a discharge support seat composed of a water-cooling pipe support beam 1 and a stepping bottom support steel trough 3 is set on the upper part of the discharge end of the stepping mechanism 7. The water-cooling pipe support beam 1 is fixedly installed on the discharge end frame of the stepping mechanism 7, and the stepping bottom support steel trough 3 is installed on the upper part. Compared with the traditional heat-resistant steel structure model, the water-cooling support seat structure has lower construction cost, longer service life, and more convenient installation and maintenance. The device has the advantages of reasonable structure, stable operation, high quality and high efficiency, relatively low construction cost, and convenient installation and maintenance. Its promotion and application will bring good economic benefits to production enterprises. When implementing the present invention, the steel pipe 5 in the stepping bottom furnace is placed in the fixed teeth 4 in the furnace for heating. The rising, forward, downward and backward movements of the stepping mechanism 7 in the furnace realize the rising, forward and downward movements of the steel pipe 5 on the fixed teeth 4, and finally the steel pipe 5 falls onto the discharge cantilever roller 2, which drives the steel pipe 5 out of the furnace. The slag hopper 11 is used to store oxide scale during daily production. When the equipment is maintained, the flap valve 14 is opened to remove the oxide scale in the slag hopper 11. The flame muffler 9 and water seal knife 13 installed on the stepping mechanism 7 extend into the dry seal device and the fixed water seal groove 12 respectively, and ensure that when the stepping mechanism 7 rises to the highest point, the flame muffler 9 remains in the dry seal device and the water seal knife 13 remains in the cooling water in the fixed water seal groove 12. The steel pipe 5 is placed in the fixed teeth 4. After heating is completed, the stepping mechanism 7 rises to lift the steel pipe 5 placed in the fixed teeth 4. After the stepping mechanism 7 moves forward one material level as a whole, the stepping mechanism 7 drops as a whole to realize that the steel pipe 5 falls into the discharging cantilever roller 2. The discharging cantilever roller 2 drives the steel pipe 5 out of the furnace. After the stepping mechanism 7 drops into place, the stepping mechanism 7 retreats to the initial position to prepare for the next cycle action. At this time, the gap 6 between the stepping mechanism 7 and the discharging fixed end wall 8 is the largest.Without a more reasonable sealing device, a large amount of flue gas will overflow. Since the gap is too large, directly setting a fixed water seal groove 12 at the bottom of the gap 6 will cause a large amount of cooling water to absorb heat from the high temperature, turning into water vapor and entering the furnace, lowering the temperature of the steel pipe 5 and affecting the heating quality of the steel pipe 5. The present utility model adopts a dual sealing structure combining dry seal and water seal, which can effectively prevent high-temperature flue gas from overflowing through the gap 6 between the stepping mechanism 7 and the fixed discharge end wall 8. At the same time, it can prevent the cooling water in the water seal groove from being affected by the high temperature and turning into water vapor and entering the furnace, thereby lowering the temperature of the steel pipe 5. It has the advantages of reasonable structure, high efficiency and energy saving, low construction and maintenance costs, and long service life. Its promotion and application will bring good economic benefits to production enterprises.
[0011] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A double sealing device for the discharge end of a walking hearth furnace, comprising a stepping mechanism (7), a fixed discharge end wall (8), a discharge cantilever roller (2), a discharge gap (6) and a sealing device, characterized in that: The sealing device is a double sealing device consisting of a dry sealing device and a water sealing device. The dry sealing device is composed of a discharge fixed end wall (8), a flame baffle (9), a dry sealing wall (10), a slag receiving hopper (11) and a flap valve (14). The flame baffle (9) is fixedly installed just below the front end surface of the stepping mechanism (7). The dry sealing wall (10) surrounded by refractory material is fixed to the discharge fixed end wall (8). A slag receiving hopper (11) is arranged between the discharge fixed end wall (8) and the bottom of the dry sealing wall (10), and a flap valve (14) is arranged at the slag outlet of the slag receiving hopper (11). The water sealing device is composed of a water sealing groove (12) and a water sealing knife (13). The water sealing groove (12) is arranged at the side and rear of the dry sealing wall (10). The water sealing knife (13) is fixedly installed at the bottom of the stepping mechanism (7) and placed in the cooling water in the water sealing groove (12).
2. The double sealing device at the discharge end of a walking hearth furnace according to claim 1, characterized in that: A discharge support seat consisting of a water-cooling pipe support beam (1) and a stepping bottom support steel trough (3) is provided on the upper portion of the discharge end of the stepping mechanism (7); the water-cooling pipe support beam (1) is fixedly mounted on the discharge end frame of the stepping mechanism (7), and the stepping bottom support steel trough (3) is mounted on the upper portion.