CN2809365Y

CN2809365Y - High temperature quick counterweight type gate valve

Info

Publication number: CN2809365Y
Application number: CN 200520097172
Authority: CN
Inventors: 熊承庆
Original assignee: Building Material Energy Saving Apparatus General Plant Huangshi
Current assignee: Building Material Energy Saving Apparatus General Plant Huangshi
Priority date: 2005-07-14
Filing date: 2005-07-14
Publication date: 2006-08-23
Anticipated expiration: 2015-07-14

Abstract

The utility model relates to a high temperature quick counterweight type gate valve for a hot blast pipe in a large-sized roll mill system. The utility model is provided with a valve body, wherein a valve plate is arranged in the valve body, and a bracket is arranged on the valve body; the bracket is provided with a lifting/lowering mechanism connected with the valve plate. The utility model has the improvement that the bracket is provided with a conterweight block which is connected with the valve plate through a steel cable. The utility model solves the problems that a valve plate of the existing large-sized high temperature gate valve has large inertia and impact force and is hard to control in descending and closing, when the valve plate rises to open, the starting force is large, a lifting/lowering mechanism with high power is needed, and the opening and closing speed is slow. The utility model can quickly shut off a hot blast pipe with small power, and is especially suitable for large-sized roll mill systems of cement and chemical engineering industries.

Description

The quick counterweight type gate valve of high temperature

(1) technical field: the utility model relates to valve type, particularly a kind of quick counterweight type gate valve of a kind of high temperature that is used on the Large Roller grinding system warm-air pipe.

(2) background technique: in the Large Roller grinding system, oven dry, grinding, select three kinds of devices of powder to carry out work simultaneously by warm-air pipe polyphone.When out of service, for the valve lock rapid (in the five seconds) of protecting the especially expensive bagroom (powder selection device) of grinding machine to require the oven dry hot blast stove to connect on the grinding machine warm-air pipe cuts out.Valve plate temperature distortion and oxidative attack in high-temperature flue gas for a long time when avoiding moving, general High temperature valve is fit to do into gate valve structure.And be example with the gate valve of φ 2.5m, adopting heavily about 1500 kilograms of the valve plate that refractory steel makes, the inertia that produces when falling with the speed of 0.5m/s and impacting especially as a forging hammer is difficult to control.Therefore in the prior art, be on the valve body of gate valve, to adorn a support, electric hoist to be installed on support to be come lifting (switch) gate valve, this structure needs power of motor big, and closing velocity is slow, can't satisfy the requirement that roller grinding system warm-air pipe needs quick closedown.

(3) summary of the invention: it is big that the utility model will overcome existing large high-temperature flue gas gate valve unlatching power of motor exactly, and the problem that closing velocity is slow proposes the quick counterweight type gate valve of a kind of high temperature.

Concrete scheme of the present utility model is: existing large high-temperature flue gas gate valve is improved, particularly install balancing weight additional on support, and be connected with valve plate in the gate valve by steel cable, to reach the purpose of balance valve plate weight.

For realizing the quick closedown gate valve, simplified structure, the elevator mechanism in the utility model are to adopt cylinder, push-rod electric machine or high-speed screws elevator mechanism commonly used, also can adopt other to be equal to fast lifting mechanism.

For make the utility model structure attractive in appearance, operate steadily, the support that is contained on the valve body described in the utility model is gantry shape, its two heel post is that open tubular column constitutes, balancing weight is divided into left and right two, be loaded on respectively in the both sides open tubular column of support, and respectively adorn a pulley, adopt two steel cables respectively to pass a pulley at two shoulder places of gantry shape support, steel cable one end connects balancing weight, and the other end connects valve plate.

The utility model is owing to set up balancing weight, descend when closing inertia and impact force of the valve plate that has thoroughly solved existing large high-temperature flue gas gate valve is big, be difficult to control, rise when opening, tripping force is big, need the heavy cranes structure, unlatching, the slow problem of closing velocity can realize small-power quick closedown warm-air pipe.Its structure is ingenious, and is effective, stable working, and power is little, and is energy-conservation, opens, closing velocity is fast, can guarantee to close in the five seconds, can satisfy the requirement that warm-air pipe in the Large Roller grinding system needs quick closedown fully.

(4) description of drawings:

Fig. 1 is a plan view of the present utility model;

Fig. 2 is a side view of the present utility model;

Fig. 3 is a monolithic counterweight structure principle schematic.

Among the figure: 1-valve body, 2-valve plate, the hollow tubing string of 3-, 4-balancing weight, 5-steel cable, 6-pulley, 7-cylinder, 8-support.

(5) embodiment:

Referring to Fig. 1, Fig. 2, the utlity model has tubular valve body 1, valve plate 2 is housed in the valve body 1, and on valve body 1, support 8 is housed, particularly in the utility model, support 8 is made gantry shape, and the both sides principal post of support 8 is hollow tubing string 3, two shoulder places of support 8 (being the upper end of hollow tubing string 3), one pulley 6 respectively is housed, adopt two steel cables 5 respectively to pass a pulley 6, steel cable 5 one ends connect balancing weight 4 (being 1/2 weight of valve plate), and the other end connects the side upper end of valve plate 2.Cylinder 7 is installed in crossbeam center at support 8, and the piston head of cylinder 7 is connected with valve plate 2.

Cylinder 7 in the utility model also can adopt other fast lifting mechanisms such as push-rod electric machine, high-speed screws.

Counterweight structure also can adopt monolithic counterweight structure mode in the utility model, and the balancing weight inconvenience of this moment places a side (it is not steady to work) of support, and preferably is loaded on the front and back symmetric arrangement of valve plate, referring to Fig. 3 schematic representation.

Claims

1. the quick counterweight type gate valve of high temperature has valve body, and valve plate is housed in the valve body, and support is housed on the valve body, and the dress elevator mechanism connects valve plate on the support, it is characterized in that: balancing weight is housed on the support, is connected with valve plate by steel cable.

2. the quick counterweight type gate valve of a kind of high temperature according to claim 1 is characterized in that: the described elevator mechanism system that is contained on the support adopts cylinder or push-rod electric machine or high-speed screws elevator mechanism.

3. the quick counterweight type gate valve of a kind of high temperature according to claim 1 and 2, it is characterized in that: the described support that is contained on the valve body is gantry shape, its two heel post is that open tubular column constitutes, balancing weight is divided into left and right two, be loaded on respectively in the both sides open tubular column of support, and respectively adorn a pulley, adopt two steel cables respectively to pass a pulley at two shoulder places of gantry shape support, steel cable one end connects balancing weight, and the other end connects valve plate.