CN111561577A

CN111561577A - High-temperature gate valve maintained on line

Info

Publication number: CN111561577A
Application number: CN202010503189.1A
Authority: CN
Inventors: 肖安俊; 方中旺
Original assignee: Hubei Jingsheng Machinery Equipment Manufacturing Co ltd
Current assignee: Hubei Jingsheng Machinery Equipment Manufacturing Co ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2020-08-21

Abstract

The invention relates to the technical field of high-temperature valves and discloses an online maintenance high-temperature gate valve which comprises a valve body, wherein the valve body is provided with two gate plates and a driving system, and two side walls of the valve body are provided with openings for the gate plates to pass through. The invention has the following advantages and effects: compared with a single flashboard in the prior art, the movement speed of the flashboard is reduced when the opening and closing time is the same, and the defect that the flashboard made of refractory materials cannot resist rapid cooling and rapid heating is overcome. The slide rail supporting frame supports the slide rail, the driving sliding table and the flashboard, and the flashboard is driven to be rigid, so that the control is convenient and the action is accurate. The deashing direction and the flashboard of ash bucket are maintained in two directions, mutually noninterfere, and the deashing sealing block of drive slip table has thermal-insulated and the convenient function of deashing. When the flashboard is maintained, the driving system drives the flashboard to be separated from the valve body, maintenance personnel maintain the flashboard outside the valve body, production of a high-temperature furnace connected with a pipeline can be independently carried out, and online maintenance of the high-temperature gate valve is achieved.

Description

High-temperature gate valve maintained on line

Technical Field

The invention relates to the technical field of high-temperature valves, in particular to an online maintenance high-temperature gate valve.

Background

The high-temperature gate valve is a key control device which is effectively utilized as a heat source in the metallurgical industrial production, is also an indispensable necessary device for meeting the environmental protection requirement and improving the industrial production benefit, and is mainly used for controlling heat in the hot gas conveying process of a blast furnace combustion system pipeline. The combustion system for metallurgical industry production mostly uses coal powder as fuel, the temperature generated by combustion is very high, generally about 1000-1200 ℃, and the high-temperature flue gas after coal powder combustion also contains SO₂NOx, a highly corrosive oxide. Therefore, the control pipeline for the working condition is conveyed by adopting a mode of adding a refractory material into a metal shell. Similarly, the gate valve, which is a pipeline control device, is required to be opened and closed. The high-temperature gate valve in the prior art generally adopts a metal steel plate as a valve body shell, a lining refractory material is lined, a gate plate adopts heat-resistant high-strength steel bars as an internal grid framework, and then the gate plate is made of a refractory material by pouring, so that the gate plate can resist high temperature and also resist hydration corrosion of sulfur and nitrogen oxides. However, the refractory material pouring gate plate is not a shaped flow line production, and the gate plate pouring process is not only physical change but also accompanied by chemical change, so that the control parameters of the pouring process are difficult to be accurate, the gate plate after pouring often cannot meet the reliable working requirements of the product, and the gate plate is often subjected to the rapid change of the environmental temperature in the using process, so that the gate plate is easy to burst and generate cracks. At present, a winch is mostly adopted to lift a flashboard to open a flue passage in a working mode of a high-temperature gate valve on a high-temperature flue, the winch reversely rotates to release, and the flashboard falls down by self weight to close and cut off the flue. When the slag falling and breaking of the flashboard occur, the broken slag of the flashboard can fall into the valve body channel to block the high-temperature flue. Once the flue is blocked by the flashboard slag fracture, the work of the combustion system needs to be stopped, and after the pipeline is cooled, the pipeline is cleaned and maintained, so that the production efficiency of an enterprise is low, and the production cost is very high. The development of reliable high-temperature flue control gate valves has profound and important significance for metallurgical blast furnace production.

Disclosure of Invention

The invention aims to provide an online maintenance high-temperature gate valve, which can maintain a controlled flue gate valve flashboard on the premise of not stopping the production of a blast furnace.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides a high temperature gate valve of online maintenance, includes the valve body, the valve body is equipped with along mobilizable two flashboards in the horizontal direction, is used for driving two the flashboard is kept away from each other or is close to the actuating system who opens and close high temperature gate valve, the confession has been seted up to valve body both sides wall the opening that the flashboard passed.

By adopting the technical scheme, the driving system drives the two flashboards to approach each other and then abut against each other, the flue gas channel in the valve body is cut off, and high-temperature flue gas cannot pass through; the driving system drives the two gate plates to be far away from each other, and the smoke channels in the valve body are communicated. The driving system drives the flashboard to move out of the side wall of the valve body, and maintenance personnel can maintain the flashboard.

The invention is further provided with: the valve body is fixed with the slide rail supporting rack, the slide rail supporting rack is fixed with the slide rail, slide rail sliding connection has two drive slip tables, two drive slip tables respectively with two the flashboard one-to-one, be fixed with the slip table slider on the drive slip table, the flashboard with the slip table slider is fixed mutually.

Through adopting above-mentioned technical scheme, the high temperature flue gas in flashboard and the valve body contacts, and the temperature is higher. The high-temperature flue gas on the flue gas passageway does not directly and drive slip table direct contact, and is fixed mutually with the slip table slider on the drive slip table, reduces the heat that the flashboard transmitted the drive slip table. Compare in flashboard snap-on at the drive slip table, the quantity of slip table slider can set up a plurality ofly, reduces the area of contact with the higher flashboard of temperature.

The invention is further provided with: and an ash hopper communicated with the valve body is arranged at the bottom of the valve body and is arranged downwards.

The invention is further provided with: the driving sliding table closing end is provided with an ash cleaning sealing block, and the ash cleaning sealing block pushes ash residues into the ash hopper along with the movement of the flashboard towards the valve body.

The invention is further provided with: the drive system including rotate set up in two drive shafts of slide rail supporting rack, be used for driving respectively two drive arrangement of drive shaft pivoted, set up in the actuating mechanism of drive slip table, two the drive shaft and two drive slip table one-to-one, be equipped with the drive wheel in the drive shaft, actuating mechanism atress in the drive wheel drives the drive slip table is followed the slide rail removes.

The invention is further provided with: and pin tooth transmission is adopted between the driving wheel and the driving mechanism.

The invention is further provided with: the driving wheel is a gear, the driving mechanism is a rack fixed on the driving sliding table, and the gear is meshed with the rack.

The invention is further provided with: the driving device is an electric device and is arranged on the sliding rail supporting frame.

By adopting the above technical solution, the electric device, i.e. the electric driving device, is also referred to as a valve electric device in the valve industry.

The invention is further provided with: the valve body is placed along the horizontal direction.

Through adopting above-mentioned technical scheme, the valve body is placed along the horizontal direction for install and use on the pipeline of level setting.

The invention is further provided with: and a sealing plate is arranged at one end of the flashboard close to the valve body, and the thickness of the sealing plate is one half of that of the flashboard.

Through adopting above-mentioned technical scheme, two flashboards of actuating system drive are close to each other the back and support tightly, and the closing plate department of two flashboards is laminated each other, and the leakproofness when two flashboards support tightly is strengthened.

The invention has the beneficial effects that:

firstly, the flashboard used under the high-temperature working condition is made of refractory materials, and the refractory materials have the defect of being not resistant to rapid cooling and rapid heating. The valve body of the invention is provided with two flashboards which are far away from or close to each other to realize the connection or disconnection of pipelines. Compared with the gate plate in the prior art, the movement speed of the gate plate can be reduced by half when the opening and closing time is the same, and the defect that the refractory material of the gate plate cannot resist rapid cooling and rapid heating can be overcome better. The actual operation can select the movement speed of the flashboard and the opening and closing time of the gate valve according to the working requirement.

And secondly, the slide rail supporting frame is adopted to support the slide rail, the driving sliding table and the flashboard, the driving sliding table moves along the slide rail to drive the flashboard to move, the driving of the flashboard is rigid, the control is convenient, and the action is accurate. Because the high temperature flashboard is placed on the driving sliding table, the problem of slag falling caused by cracks generated during high temperature work does not exist, and the blockage of a flue cannot be generated. Even if the high-temperature gate valve does not act for a long time, dust-containing particles in the smoke fall to the movement channel of the driving sliding table, the dust can be pushed into a dust hopper arranged on the valve body by the dust cleaning sealing block fixed at the front end of the driving sliding table when the valve is closed, and then the dust is periodically discharged. The driving system drives the flashboard to the outer sides of the two sides of the valve body, and maintenance personnel can maintain and repair the flashboard.

Thirdly, the ash bucket on the valve body sets up downwards, and the flashboard direction of motion is the horizontal direction, and the deashing direction is opened and close on two directions with the flashboard, mutually noninterfere, and deashing operation and flashboard maintenance operation part satisfy the valve plate and independently maintain, have the convenient function of driving away the deposition.

Fourthly, the ash removal sealing block at the closing end of the driving sliding table is used for insulating heat and removing ash, high-temperature flue gas in the valve body cannot contact with the driving sliding table or diffuse outside the valve body, and ash is pushed into the ash hopper by the ash removal sealing block when the driving sliding table moves towards the inside of the valve body, so that the high-temperature gate valve can clean ash regularly.

Fifthly, the high-temperature gate valve is installed on a horizontal pipeline when in use, when the flashboard needs to be maintained, the driving system drives the flashboard to be separated from the valve body, maintenance personnel maintain the flashboard, and the flashboard is located on two horizontal side faces of the valve body during maintenance, so that the influence on the safety of the maintenance personnel caused by the conditions of high-temperature smoke rising, high-temperature smoke falling and the like can be avoided. Because the flashboard has been broken away from flue gas passageway this moment, the high temperature furnace production that links to each other with the pipeline can be carried out independently completely, realizes the online maintenance to high temperature gate valve.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of the closed state of embodiment 1.

Fig. 2 is a schematic view of the positional relationship among the drive slide table, the drive shaft, and the drive wheel in embodiment 1.

Fig. 3 is a schematic view of the on state of embodiment 1.

FIG. 4 is a schematic view of the maintenance state of embodiment 1.

In the figure, 1, a valve body; 11. a flue gas channel; 12. an opening; 2. a shutter plate; 21. a sealing plate; 3. a slide rail; 4. a slide rail support frame; 5. a drive device; 6. an ash hopper; 61. cleaning the cover plate; 7. a drive shaft; 71. a drive wheel shaft bearing; 72. a drive wheel; 8. driving the sliding table; 81. a sliding table sliding block; 82. and a dust cleaning sealing block.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

Example 1: the utility model provides a high temperature gate valve of online maintenance, as shown in figure 1, figure 2, figure 3, includes valve body 1, two flashboards 2, installs the flange on the valve body 1, is equipped with flue gas passageway 11 in the valve body 1, and the equal level of valve body 1 and flue gas passageway 11 is placed. Two side walls of the valve body 1 are provided with openings 12 for the flashboard 2 to pass through, and the openings 12 are communicated with the smoke channel 11. A sliding rail supporting frame 4 is fixed on the valve body 1, a sliding rail 3 is fixed on the sliding rail supporting frame 4, and the sliding rail 3 sequentially penetrates through the first opening 12, the smoke channel 11 and the second opening 12. Sliding connection has two drive slip tables 8 on slide rail 3, and in vertical direction, slide rail 3 and drive slip table 8 all are less than flue gas passageway 11. Two drive slip tables 8 respectively with two flashboards 2 one-to-one, be fixed with a plurality of slip table sliders 81 on every drive slip table 8, flashboard 2 is located drive slip table 8 top and fixes mutually with a plurality of slip table sliders 81. The high-temperature gate valve further comprises a driving system, the driving system is used for driving the two driving sliding tables 8 to slide along the sliding rail 3, the two driving sliding tables 8 are close to each other to drive the two flashboards 2 to be close to each other so as to close the high-temperature gate valve, and the two driving sliding tables 8 are far away from each other to drive the two flashboards 2 to be far away from each other so as to open the high-temperature gate valve.

As shown in fig. 2, 3 and 4, the driving system includes two driving shafts 7 rotatably connected to the rail support frame 4, two driving devices 5, and a driving mechanism installed below each driving sliding table 8, wherein driving wheel 72 shaft bearings 71 are installed at two ends of the driving shafts 7, and the driving wheel 72 shaft bearings 71 are installed on the rail support frame 4. The two driving devices 5 are both electric devices and are arranged on the slide rail supporting frame 4. The two electric device output ends are respectively connected with the driving shaft 7 and used for driving the driving shaft 7 to rotate. The two driving shafts 7 are respectively in one-to-one correspondence with the two driving sliding tables 8, the driving shafts 7 are fixedly provided with driving wheels 72, and the driving wheels 72 are gears. The driving mechanism below the driving sliding table 8 is a rack, and the gear is meshed with the rack. The electric device drives the driving shaft 7 to rotate, the driving wheel 72 of the driving shaft 7 drives the driving mechanism to move, and the driving mechanism drives the driving sliding table 8 and the gate plate 2 to move, so that the effect of driving the gate plate 2 to move is realized.

As shown in fig. 3, the flashboard 2 is close to the one end in the valve body 1 and is equipped with the closing plate 21, closing plate 21 and flashboard 2 integrated into one piece, and the thickness of closing plate 21 is the half of flashboard 2 thickness, and the closing plate 21 dislocation set of two flashboards 2, when two flashboards 2 are close to each other and support tightly, two closing plate 21 departments laminate each other, strengthen the leakproofness between two flashboards 2.

As shown in FIG. 3, an ash bucket 6 is installed at the bottom of the valve body 1, an opening 12 is formed above the ash bucket 6 and is communicated with a flue gas channel 11 of the valve body 1, and an ash removal cover plate is connected to the lower end of the ash bucket 6 through threads. The slide rail 3 is located the ash bucket 6 top, and the one end that every drive slip table 8 is close to in the valve body 1 is for closing the end, closes the end and is fixed with deashing seal block 82, and deashing seal block 82 plays thermal-insulated and deashing's effect, and the flue gas of separation flue gas passageway 11 contacts with drive slip table 8 promptly. The bottom of the ash removal sealing block 82 is in contact with the bottom wall of the opening 12 and the sliding rail 3 to realize sealing, two side walls of the ash removal sealing block 82 are in contact with two side walls of the opening 12 to realize sealing, and the upper end of the ash removal sealing block 82 is in contact with the lower end of the flashboard 2 to realize sealing. When the sliding table 8 moves towards the valve body 1 along with the driving, the ash at the sliding rail 3 is pushed into the ash hopper 6.

The working principle of the high-temperature gate valve is as follows: the high-temperature flue is connected with the high-temperature furnace, the high-temperature gate valve is arranged on the horizontal high-temperature flue through a flange, and the valve body 1 and the flue gas channel 11 are both in a horizontal state. The driving system drives the two gate plates 2 to approach each other and then abut against each other, a flue gas channel 11 in the valve body 1 is cut off, and high-temperature flue gas cannot pass through; two flashboards 2 are driven by a driving system to be away from each other, a flue gas channel 11 in the valve body 1 is communicated, and high-temperature flue gas can circulate. The driving system drives the flashboard 2 to move out of the side wall of the valve body 1, and maintenance personnel can maintain the flashboard 2.

Example 2: the difference between the gate valve for on-line maintenance and the gate valve in embodiment 1 is that the electrical device is fixed on the ground and is not mounted on the rail support frame 4. The electric fitting drives the driving shaft 7 to rotate through a transmission mechanism, and the transmission mechanism can select belt transmission or chain transmission according to actual conditions. The driving wheel 72 and the driving mechanism are in pin tooth transmission, the driving wheel 72 is a pin gear, and the driving mechanism is a pin rack fixed at the bottom of the driving sliding table 8. The maintainer controls the electric fitting on the ground to drive the driving shaft 7 to rotate, and the driving wheel 72 on the driving shaft 7 drives the driving sliding table 8 and the gate plate 2 to move through the annular chain, so that the high-temperature gate valve can be operated remotely.

Claims

1. The utility model provides a high temperature gate valve of online maintenance, includes valve body (1), its characterized in that: the high-temperature gate valve is characterized in that the valve body (1) is provided with two movable gate plates (2) in the horizontal direction and a driving system for driving the two gate plates (2) to be away from or close to each other to open and close the high-temperature gate valve, and openings (12) for the gate plates (2) to pass through are formed in two side walls of the valve body (1).

2. An on-line maintenance high-temperature gate valve according to claim 1, characterized in that: valve body (1) is fixed with slide rail supporting rack (4), slide rail supporting rack (4) are fixed with slide rail (3), slide rail (3) sliding connection has two drive slip tables (8), two drive slip table (8) respectively with two flashboard (2) one-to-one, be fixed with slip table slider (81) on drive slip table (8), flashboard (2) with slip table slider (81) are fixed mutually.

3. An on-line maintenance high-temperature gate valve according to claim 2, characterized in that: the bottom of the valve body (1) is provided with an ash bucket (6) communicated with the interior of the valve body (1), and the ash bucket (6) is arranged downwards.

4. An on-line maintenance high-temperature gate valve according to claim 3, characterized in that: the driving sliding table (8) is provided with an ash cleaning sealing block (82) at the closing end, and the ash cleaning sealing block (82) pushes ash residues into the ash hopper (6) along with the flashboard (2) towards the inner motion of the valve body (1).

5. An on-line maintenance high-temperature gate valve according to claim 2, characterized in that: the drive system including rotate set up in two drive shaft (7) of slide rail supporting rack (4), be used for driving two respectively drive two drive arrangement (5) of drive shaft (7) pivoted, set up in the actuating mechanism of drive slip table (8), two drive shaft (7) respectively with two drive slip table (8) one-to-one, be equipped with drive wheel (72) on drive shaft (7), the actuating mechanism atress in drive wheel (72) drive slip table (8) are followed slide rail (3) remove.

6. An on-line maintenance high-temperature gate valve according to claim 5, characterized in that: the driving wheel (72) and the driving mechanism are in pin-tooth transmission.

7. An on-line maintenance high-temperature gate valve according to claim 5, characterized in that: the driving wheel (72) is a gear, the driving mechanism is a rack fixed on the driving sliding table (8), and the gear is meshed with the rack.

8. An on-line maintenance high-temperature gate valve according to claim 5, characterized in that: the driving device (5) is an electric device, and the driving device (5) is arranged on the sliding rail supporting frame (4).

9. An on-line maintenance high-temperature gate valve according to claim 1, characterized in that: the valve body (1) is placed along the horizontal direction.

10. An on-line maintenance high-temperature gate valve according to claim 1, characterized in that: one end of the flashboard (2) close to the interior of the valve body (1) is provided with a sealing plate (21), and the thickness of the sealing plate (21) is one half of that of the flashboard (2).