Carbon black tail gas valve

Abstract

The utility model 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] This utility model belongs to the field of automation control and relates to a carbon black tail gas valve. It is a special valve used for controlling the tail gas section in the carbon black production process. It can be applied to the control of tail gas from carbon black reactors, tail gas from carbon black collection systems, and tail gas from carbon black tail gas treatment systems. Background Technology

[0002] Control valves, as the terminal execution units of automatic control systems, are widely used in various industries. As the field of automatic control continues to develop towards high-end technologies, the requirements for control valves are also increasing. As field instruments, control valves operate in harsh environments and control objects with complex characteristics. The carbon black production process generates a large amount of high-temperature, high-pressure, corrosive exhaust gas containing dust and particulate matter. This production section typically uses butterfly valves to control the exhaust gas. However, traditional butterfly valves, due to structural limitations, are prone to jamming during operation due to the accumulation of dust and particulate matter, leading to sluggish valve opening and closing, or even complete seizure. This makes them unsuitable for the stringent requirements of controlling carbon black exhaust gas. Summary of the Invention

[0003] The purpose of this invention is to provide a carbon black exhaust valve to solve the problems of jamming and stuckness that occur in traditional butterfly valves in exhaust gas control.

[0004] The technical solution adopted in this utility model is as follows: a butterfly valve, comprising a valve body, valve plate, shaft, packing support ring, packing, packing gland, bearing seat, bearing, bearing cover, and bracket, among other main components. The shaft guiding structure abandons the traditional method of using a bushing for guidance within the valve body. Instead, the shaft hole within the valve body is shortened, the packing gland is deepened, and the shaft hole is designed with sufficient gaps. The shaft extending from both ends of the valve plate does not guide the movement inside the valve body; instead, brackets and bearing seats are provided on the upper and lower end faces of the valve body. Upper and lower bearings are respectively installed within the brackets and bearing seats. When the shaft rotates, it is guided by the bearings at the upper and lower ends outside the valve body. This structural design places the shaft guidance outside the valve body, preventing the accumulation of dust, particles, and other impurities in the shaft hole within the valve body, thus solving the problem of shaft jamming or even seizing. Attached Figure Description

[0005] Figure 1 Schematic diagram of carbon black exhaust valve structure

[0006] Figure 2 Partial structural diagram of the bearing guide of the carbon black exhaust valve

[0007] Figure 3 Partial structural diagram of the packing gland of the carbon black tail gas valve

[0008] In the diagram: 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 housing; 11. Lower bearing; 12. Bearing cover. Detailed Implementation

[0009] The following is in conjunction with the appendix Figure 1 This utility model will be described in detail.

[0010] Reference Figure 1 The structure of the carbon black exhaust valve includes main components such as an upper bearing 01, a bracket 02, a packing gland 03, upper packing 04, a packing support ring 05, lower packing 06, a shaft 07, a valve plate 08, a valve body 09, a bearing seat 10, a lower bearing 11, and a bearing cover 12. The shaft 07 is fixedly connected to the valve plate 08 by welding pins and is housed within the valve body 09. Symmetrical through-hole packing glands are designed at both 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 placed sequentially within the packing glands. The packing gland 03 is fixedly connected to the valve body 09 by double-ended bolts and is secured to the upper and lower packing layers by the packing support ring 05. This double-layer packing structure ensures a seal at both ends of the shaft 07, preventing exhaust gas leakage. A bearing housing 10 is provided on the lower end face of the valve body 09. A lower bearing 11 is installed in the bearing housing 10. A shaft 07 extends out of the lower end of the valve body 09 and is guided by the lower bearing 11 in the bearing housing 10. A bearing cover 12 is provided on the lower end face of the bearing housing 10 and is connected and sealed to the bearing housing 10 by bolts. A bracket 02 is provided on the upper end face of the valve body 09. An upper bearing 01 is installed in the bracket 02. A shaft 07 extends out of the upper end of the valve body 09 and is guided by the upper bearing 01 in the bracket 02. The upper end face of the bracket 02 is used to install an actuator (pneumatic, electric, hydraulic, or other different drive methods). The upper end of the shaft 07 passes through the bracket 02 and is connected to the actuator at the top.

[0011] The working principle of the carbon black tail gas valve is as follows: the shaft receives the output torque from the actuator, which drives the valve plate to rotate, thereby realizing the delivery and opening / closing control of carbon black tail gas.

[0012] The key point of this utility model carbon black exhaust valve is: a. As shown in the attached... Figure 1 The shaft that drives the valve plate to rotate is guided by bearings at the upper and lower ends of the valve body during operation, with the guiding parts far away from the exhaust gas and not in contact with it. In traditional butterfly valve structures, the shaft is guided by a bushing inside the valve body. This bushing is susceptible to corrosion and wear due to the corrosive effects of exhaust gas and dust and particles, which can cause the shaft to jam inside the bushing and prevent normal rotation. The bearing-guided structure of this invention completely solves this problem in exhaust gas control. (b as attached) Figure 2 The valve body stuffing box is equipped with a stuffing support ring to form a double-layer stuffing structure. This structure ensures effective sealing of both ends of the exhaust valve shaft and prevents carbon black exhaust gas from leaking out.

Claims

1. A carbon black tail gas valve comprising the following main parts: valve body (09), valve plate (08), shaft (07), lower packing (06), packing support ring (05), upper packing (04), packing gland (03), bearing seat (10), upper bearing (01), lower bearing (11), bearing cover (12) and bracket (02); characterized in that: The shaft (07) and the valve plate (08) are fixedly connected by pin welding in the valve body (09), the shaft (07) driving the valve plate (08) to rotate extends out of the upper and lower ends of the valve body (09) and is guided by the upper bearing (01) and the lower bearing (11) in the upper end support (02) and the lower end bearing seat (10), the shaft (07) in the valve body (09) is respectively sealed by the lower packing (06) and the upper packing (04) in the packing case at the upper and lower ends of the valve body (09).

2. The carbon black tail gas valve of claim 1, wherein: The upper and lower ends of the valve body (09) are respectively provided with the support (02) and the bearing seat (10), the support (02) and the bearing seat (10) are respectively provided with the upper bearing (01) and the lower bearing (11), the lower end surface of the bearing seat (10) is provided with the bearing cover (12) which is connected and closed with the bearing seat (10) by bolts.

3. The carbon black tail gas valve of claim 1, wherein: The upper and lower ends of the valve body (09) are symmetrically designed with the packing case, the lower packing (06), the packing support ring (05), the upper packing (04) and the packing gland (03) are sequentially arranged in the upper and lower packing cases, and the packing gland (03) is fixedly connected with the valve body (09) by a double-headed bolt.

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