CN211820796U

CN211820796U - Counter weight type fast lifting gate valve

Info

Publication number: CN211820796U
Application number: CN201922015435.4U
Authority: CN
Inventors: 彭镇委; 朱灿朋; 贺万才
Original assignee: Beijing Shougang International Engineering Technology Co Ltd
Current assignee: Beijing Shougang International Engineering Technology Co Ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-10-30
Anticipated expiration: 2029-11-20

Abstract

A counterweight type fast lifting gate valve belongs to the technical field of gate valves. The device comprises a flashboard (1), a lower frame (2), an upper frame (3), a balance weight (4), a safety bolt (5), an adjusting support (6), an adjusting bolt (7), a steel wire rope (8) and a limiting device (11); the gate plate (1) is arranged between the lower frame (2) and the upper frame (3), and the gate plate (1) is connected with the counterweight (4) through one end of a steel wire rope (8); the other end of the steel wire rope (8) is connected to the balance weight (4) through a buckle; an adjusting support (6) with a bolt hole is welded on the balance weight (4), and an adjusting bolt (7) is connected with the adjusting support (6) through the bolt hole. The method has the advantages that the problems of quick opening of the flue gate and quick opening in power failure in the coke oven desulfurization and denitrification system are solved; and the gate valve has small investment, safety and reliability, and can display the position of the gate in a control room.

Description

Counter weight type fast lifting gate valve

Technical Field

The utility model belongs to the technical field of the slide valve, especially, relate to a counter weight formula promotes slide valve fast, is applicable to the newly-increased SOx/NOx control system of coke oven.

Background

At present, flue gas discharged in the coking production process of domestic coke ovens contains flue gas pollutants such as sulfur dioxide, nitric oxide and the like, and is also a main substance for forming acid rain, thereby causing a series of environmental problems. The coke-oven plant needs a matched desulfurization and denitrification device under the requirement of environmental protection. The key technology in the desulfurization and denitrification project is that flue gas is absorbed into a desulfurization and denitrification device through a fan, a gate valve is needed, and the gate valve is in a closed state when a desulfurization and denitrification system normally operates, so that the flue gas is ensured not to directly enter a chimney through a flue. The rotary gate valve on the original coke-oven plant has two defects, namely the rotary gate valve can be normally closed but can be opened for too long time, and the rotary gate valve can not be opened in a power failure state.

Disclosure of Invention

The utility model aims at overcoming the defects that the rotary gate valve in the prior art can be normally closed but opened for too long time and cannot be opened in a power failure state, and realizing the quick opening of a flue gate and the quick opening in power failure in a coke oven desulfurization and denitrification system; and moreover, the investment is small, the safety and the reliability are realized, and the position of the gate plate can be displayed in a control room.

The utility model discloses a flashboard 1, underframe 2, upper ledge 3, counter weight 4, safe bolt 5, regulation support 6, adjusting bolt 7, wire rope 8, stop device 11.

The flashboard 1 is arranged between the lower frame 2 and the upper frame 3, and the flashboard 1 is connected with the counterweight 4 through one end of a steel wire rope 8. The flashboard 1 is drilled with a hole and penetrates through a hanging ring, and the steel wire rope 8 is fixed with the hanging ring. The other end of the steel wire rope 8 connected with the flashboard 1 is connected to the counterweight 4 by a buckle. In order to facilitate adjustment after the steel wire rope 8 is installed, an adjusting support 6 with a bolt hole needs to be welded on the balance weight 4, the adjusting bolt 7 is connected with the adjusting support 6 through the bolt hole, and the height of the installed steel wire rope 8 can be adjusted through the adjusting bolt 7.

The gate plate 1 is formed by welding a steel structure and a steel plate, and the material of the gate plate is 16 Mn. Limit switches 11 are arranged at the upper limit position and the lower limit position of the flashboard 1.

Two round holes are formed in the flashboard 1, two round holes are also formed in the upper frame 3, two safety bolts are arranged, and when the two round holes are overlapped, the flashboard 1 is fixed by the safety bolts 5. Before the gate valve is installed and is not put into use and when the gate valve is normally used for maintenance, the gate valve 1 is prevented from falling down by the safety bolt 5 entering the round hole.

The adjusting support 6 with the bolt hole is welded on the balance weight 4, the height of the installed steel wire rope 8 can be adjusted through the adjusting bolt 7, the length of the steel wire rope can be conveniently adjusted by an overhaul worker after the steel wire rope is used for a period of time, and the length of two steel wire ropes on the balance weight is consistent to ensure that the balance weight is horizontal.

And the left end and the right end of the counterweight 4 are provided with guide devices to prevent the counterweight from deviating in the up-and-down movement process.

The gate plate 1 is connected with the balance weight 4 through a steel wire rope 8, the valve plate 1 is lifted, holes need to be drilled in the gate plate 1, a hanging ring needs to be penetrated, and the steel wire rope 8 is fixed with the hanging ring. The other end is connected with the weight box by a shackle. When a fan in a desulfurization and denitrification system in a coke oven system fails (no power failure), the winch motor is electrified and reversely rotated to drive the counterweight to move downwards at the speed of the winch 9, and the flashboard is lifted upwards, so that waste gas generated by coke oven production directly enters a chimney through a flue. When power is off, the contracting brake of the winch 9 is released through the air passage 10 system, and the balance weight 4 with the brake plate is lifted upwards for 15 seconds to complete lifting.

The utility model has the advantages of, can open fast and open when having a power failure flue gate among the coke oven SOx/NOx control system to, the investment is little, safe and reliable, can show the slide valve of flashboard position in the control room.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a left side view of fig. 1.

In the figure, a flashboard 1, a lower frame 2, an upper frame 3, a counterweight 4, a safety bolt 5, an adjusting support 6, an adjusting bolt 7, a steel wire rope 8, a winch 9, an air path system 10 and a limiting device 11.

Detailed Description

The state of the gate valve in the normal operation of the desulfurization and denitrification system is shown in figure 1. The flashboard 1 is arranged between the lower frame 2 and the upper frame 3 and is connected with the counterweight 4 through a steel wire rope 8. The middle position of the balance weight 4 is connected with the winch 9. Since the weight of the counterweight 4 is larger than that of the shutter 1, the hoist 9 needs to provide a lifting force so that the weight of the counterweight 4 is equal to the force of the shutter 1 plus the hoist 9.

When the fan in the desulfurization and denitrification system breaks down (no power failure), the motor of the winch 9 is electrified and reversely rotated to drive the counterweight 4 to move downwards at the speed of the winch, and the flashboard 1 is lifted upwards, so that waste gas generated by coke oven production directly enters the chimney through the flue. When power is off, the contracting brake of the winch 9 is released through the air path system 10, and the weight of the balance weight 4 is larger than that of the flashboard 1, so that the flashboard 1 is driven to ascend for 15 seconds to complete lifting.

And limit switches 11 are arranged at the upper limit position and the lower limit position of the flashboard 1, and signals of the limit switches display the position of the flashboard 1 on a computer screen of a control room.

Claims

1. A counterweight type rapid lifting gate valve is characterized by comprising a gate plate (1), a lower frame (2), an upper frame (3), a counterweight (4), a safety bolt (5), an adjusting support (6), an adjusting bolt (7), a steel wire rope (8) and a limiting device (11); the gate plate (1) is arranged between the lower frame (2) and the upper frame (3), and the gate plate (1) is connected with the counterweight (4) through one end of a steel wire rope (8); the other end of the steel wire rope (8) is connected to the balance weight (4) through a buckle; an adjusting support (6) with a bolt hole is welded on the balance weight (4), and an adjusting bolt (7) is connected with the adjusting support (6) through the bolt hole.

2. A weighted fast-lift gate valve according to claim 1, characterised in that the gate (1) is made of steel and steel plate by welding, the material of which is 16 Mn.

3. A weighted fast-lift gate valve according to claim 1, characterised in that the upper and lower extreme positions of the gate (1) are provided with limit switches (11).

4. A weighted fast-lifting gate valve according to claim 1, characterised in that two circular holes are made in the gate (1) and at the same time two circular holes are made in the upper frame (3), equipped with two safety pins (5).

5. A weighted fast-lift gate valve according to claim 1, characterised in that guides are provided at the left and right ends of the weight (4).