Carbon black tail gas valve

Abstract

The invention discloses a carbon black tail gas valve which is a special valve used for tail gas section control in the carbon black production process, and the special structural design of the carbon black tail gas valve solves the problem that a traditional butterfly valve is prone to being stuck when used in a carbon black tail gas section. The carbon black tail gas valve comprises a valve body, a valve plate, a shaft, a filler supporting ring, filler, a filler gland, a bearing seat, a bearing, a bearing cover, a support and other main parts. The valve plate is driven by a pneumatic (or electric or hydraulic) actuating mechanism to drive the valve plate to act, so that tail gas is conveyed and controlled in the carbon black production process.

Description

Technical Field

[0001] The present invention belongs to the field of automatic control and relates to a carbon black tail gas valve, which is a special valve used for controlling the tail gas section in the carbon black production process and can be applied to control the carbon black reaction tail gas, the carbon black collection system tail gas, the carbon black tail gas treatment system tail gas, etc. Background Art

[0002] As the terminal execution unit of the automatic control system, the control valve is widely used in all walks of life. As the field of automatic control continues to develop towards high-end technology, the requirements for control valves are getting higher and higher. As a field instrument, the industrial environment in which the control valve is located is relatively harsh and the characteristics of the control object are complex. During the production process of carbon black, a large amount of high-temperature, high-pressure, corrosive exhaust gas containing dust and particulate matter will be generated. This production section generally uses a butterfly valve to control the exhaust gas. Due to structural limitations, traditional butterfly valves are prone to jamming during operation due to the accumulation of dust and particulate matter, resulting in poor valve plate switching and even jamming, which cannot meet the requirements of harsh working conditions such as carbon black exhaust control. Summary of the invention

[0003] The purpose of the present invention is to provide a carbon black exhaust valve to solve the problems of jamming and blocking of traditional butterfly valves in exhaust control.

[0004] The technical solution adopted by the present invention is: a butterfly valve, including valve body, valve plate, shaft, packing support ring, packing, packing gland, bearing seat, bearing, bearing cover and bracket and other main parts. The shaft guide structure abandons the traditional bushing guide in the valve body, shortens the shaft hole in the valve body, deepens the stuffing box, and designs the shaft hole with sufficient intervals. The shaft extending from both ends of the valve plate is not guided inside the valve body, but is provided with a bracket and a bearing seat on the upper and lower end faces of the valve body. The upper and lower bearings are respectively installed in the bracket and the bearing seat. When the shaft is working and rotating, it is guided by the bearings at the upper and lower ends outside the valve body. This structural design places the shaft guide outside the valve body, and the shaft hole in the valve body will not accumulate dust, particles and other impurities, which solves the problem of the shaft getting stuck or even stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 Schematic diagram of carbon black exhaust valve structure Figure 2 Partial structure diagram of carbon black exhaust valve bearing guide Figure 3 Partial structure diagram of carbon black exhaust valve stuffing box In the figure: 01, upper bearing, 02, bracket, 03, packing gland, 04, upper packing, 05, packing support ring, 06, lower packing, 07, shaft, 08, valve plate, 09, valve body, 10, bearing seat, 11, lower bearing, 12, bearing cover DETAILED DESCRIPTION

[0006] The following will combine with the attached drawings Figure 1 to describe the present invention in detail.

[0007] Referring to Figure 1 , the structure of the carbon black tail gas valve includes main parts such as upper bearing 01, bracket 02, packing gland 03, upper layer packing 04, packing support ring 05, lower layer packing 06, shaft 07, valve plate 08, valve body 09, bearing seat 10, lower bearing 11, bearing cover 12, etc. The shaft 07 and the valve plate 08 are fixedly connected by welding with a pin and are arranged in the valve body 09. Through holes packing boxes are symmetrically designed at the upper and lower ends of the valve body 09. The lower layer packing 06, packing support ring 05, upper layer packing 04 and packing gland 03 are placed in the packing box in sequence. The packing gland 03 is fixedly connected to the valve body 09 by a stud bolt and compresses the upper and lower layers of packing through the packing support ring 05. The double-layer packing structure ensures the sealing of the upper and lower ends of the shaft 07 and prevents the tail gas from leaking. A bearing seat 10 is arranged on the lower end surface of the valve body 09. A lower bearing 11 is installed in the bearing seat 10. The shaft 07 extending out of the lower end of the valve body 09 is guided by the lower bearing 11 in the bearing seat 10. A bearing cover 12 is arranged on the lower end surface of the bearing seat 10 and is connected and closed with the bearing seat 10 by bolts. A bracket 02 is arranged on the upper end surface of the valve body 09. An upper bearing 01 is installed in the bracket 02. The shaft 07 extending out of the upper end of the valve body 09 is guided by the upper bearing 01 in the bracket 02. The upper end surface of the bracket 02 is used to install an actuator (different driving methods such as pneumatic, electric, hydraulic, etc.). The upper end of the shaft 07 passes through the bracket 02 and is connected to the actuator at the top.

[0008] The working principle of the carbon black tail gas valve is: the shaft receives the output torque from the actuator, drives the valve plate to rotate, and realizes the transportation, opening and closing control of the carbon black tail gas.

[0009] The key points of the carbon black tail gas valve of the present invention are: a As shown in the attached drawings Figure 1 , the shaft that drives the valve plate to rotate is guided by the bearings at the upper and lower ends outside the valve body during operation, and the guiding part is far away from the tail gas and has no contact. In the traditional butterfly valve structure, the shaft is guided by the bushing inside the valve body. The bushing is affected by the corrosiveness of the tail gas, dust, particles, etc., and is easily corroded and worn, resulting in the shaft being stuck in the bushing and unable to rotate normally. The bearing guiding structure of the present invention completely solves this problem in tail gas control. b As shown in the attached drawings Figure 2 , a packing support ring is arranged in the valve body packing box to form a double-layer packing structure, which ensures the effective sealing of both ends of the tail gas valve shaft and prevents the carbon black tail gas from leaking.

Claims

1. Carbon black tail gas valve, including valve body, valve plate, shaft, packing, packing support ring, packing gland, bearing seat, bearing, bearing cover and bracket and other main parts, characterized by: The shaft and valve plate are arranged in the valve body. The shaft that drives the valve plate to rotate extends out of the upper and lower ends of the valve body, and is guided by bearings in the upper end bracket and the lower end bearing seat. The shaft located inside the valve body is sealed by double-layer packing in the stuffing boxes at the upper and lower ends of the valve body.

2. The carbon black exhaust valve according to claim 1, characterized in that: The upper and lower ends of the valve body 09 are respectively installed with a bracket 02 and a bearing seat 10. The bracket 02 and the bearing seat 10 are respectively installed with an upper bearing 01 and a lower bearing 11. The shaft 07 extending out of the valve body 09 is guided in the upper bracket 02 and the lower bearing seat 10 through the upper shaft 01 and the lower bearing 11.

3. The carbon black tail gas valve according to claim 1, characterized in that: Stuffing boxes are symmetrically designed at the upper and lower ends of the valve body 09. The lower packing 06, packing support ring 05, upper packing 04 and packing gland 03 are installed in sequence in the stuffing boxes at the upper and lower ends. The shaft 07 at both ends inside the valve body 09 is sealed by double-layer packing.

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