CN201661694U - A loose-leaf manual butterfly valve - Google Patents

Abstract

The utility model relates to a butterfly valve, in particular to a butterfly valve for adjusting air volume and air pressure in a ventilation and air conditioning system or a dust removal system, and belongs to the technical field of mechanical valves. The manual butterfly valve is equipped with side-by-side drive shafts on the left and right sides of the short tube. The drive shafts are respectively fixed with the front and rear valve plates that match the short tube shape. The ends of the barrel are each fitted with a handle. The utility model has the advantages of simple structure, easy manufacture, large adjustment range and easy operation, and is more suitable for application in ventilation and air conditioning systems or dust removal systems.

Description

A loose-leaf manual butterfly valve

technical field

The utility model relates to a butterfly valve, in particular to a butterfly valve for adjusting air volume and air pressure in a ventilation and air conditioning system or a dust removal system, and belongs to the technical field of mechanical valves. the

Background technique

Ordinary manual butterfly valves (round or rectangular) have only one valve plate. By changing the opening of the valve to adjust the resistance of the fluid in the pipeline, the adjustment amount is small and the operation is not easy to control, especially in ventilation and air conditioning systems or dust removal In the system, this kind of traditional manual butterfly valve is even more inconvenient to use. the

Contents of the invention

The purpose of this utility model is to provide a loose-leaf manual butterfly valve, which has simple structure, easy manufacture, large adjustment range, easy operation, and is more suitable for application in ventilation and air conditioning systems or dust removal systems. the

The technical scheme adopted by the utility model is: the rotary seats on the left and right sides of the short tube are respectively equipped with side-by-side drive shafts, and the front and rear valve plates matching the shape of the short tube are respectively fixed on the drive shafts. The ends where the drive shaft extends out of the short tube are each provided with a handle. the

The rotating end of the handle is equipped with an integrated limit plate, and the limit plate is provided with an arc-shaped limit groove, and the limit bolt fixed on the rotary seat passes through the limit groove and is fixed by a wing nut. . the

The upper and lower ends of the short tube are provided with flanges. the

The left and right drive shafts are independent, and they are separated in the middle of the valve plate. The front valve plate is fixed on the left drive shaft, and the rear valve plate is fixed on the right drive shaft; the left and right handles are correspondingly fixed on the left and right drive shafts, and the position of the front and rear valve plates can be changed by pulling the left and right handles. The opening degree can realize the adjustment of the air flow and air pressure of the pipeline, so as to achieve the resistance balance of the system loop. When the left and right handles rotate the front and rear valve plates to a proper opening, the front and rear valve plates can be reliably limited to the proper opening position by tightening the wing nuts. the

The beneficial effects of the utility model are:

Since the valve plate is divided into two halves and made into a loose-leaf type, the two halves of the valve plate can be rotated and adjusted independently. Therefore, compared with the ordinary butterfly valve using a whole valve plate, the adjustment range of the air volume and air pressure of this butterfly valve is relatively small. Wide, easy to grasp when operating, and conducive to adjusting pipeline resistance. the

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described. the

Fig. 1 is the front view of the utility model;

Fig. 2 is a cross-sectional view along line A-A of Fig. 1 . the

In the figure: 1-front valve plate; 2-short tube; 3-left handle; 4-left drive shaft; 5-left spring washer; 6-left nut, 7-left wing nut; 8-left flat washer ;9-left-handed seat; 10-right-handed seat; 11-right flat washer; 12-right wing nut; 13-right spring washer; 14-right nut; 15-right drive shaft; 16-right handle; 17-rear Valve plate; 18-left limit bolt; 19-right limit bolt; 20-limit groove; 21-limit plate. the

Detailed ways

Referring to Figures 1 and 2, the passage section of the manual butterfly valve described in the present invention can be circular or rectangular, including a front valve plate 1, a short tube (with flange) 2, a left handle (controlling the front valve plate) 3, Left drive shaft 4, left spring washer 5, left nut 6, left wing nut 7, left flat washer 8, left-handed seat 9, right-handed seat 10, right flat washer 11, right wing nut 12, right spring washer 13, Right nut 14, right drive shaft 15, right handle (control rear valve plate) 16, rear valve plate 17, left limit bolt 18, right limit bolt 19. the

A left-handed seat 9 and a right-handed seat 10 are respectively arranged on both sides of the short tube 2 (with flange). Left handle 3 and right handle 16 are respectively fixed on left drive shaft 4 and right drive shaft 15, with left spring washer 5, left nut 6 left handle 3 is installed on the left-hand seat 9, by the left limiter that is provided with on the left-hand seat 9 The positioning bolt 18, the left flat washer 8 and the left wing nut 7 can limit the pulling position of the left handle 3 in the limit groove 20, thereby controlling the opening of the front valve plate 1, and the front valve plate 1 is fixed on the left drive shaft 4 on. The installation mode of rear valve plate 17 is the same as that of front valve plate 1, and they each have independent drive shafts, so when the degree of opening of valve plate can be adjusted respectively and be fixed. The upper and lower ends of the short tube 2 are provided with flanges, which can be easily connected with pipelines. the

Claims (3)

1. loose-leaf type Hand-operated butterfly valve, it is characterized in that: at the live axle that respectively is equipped with on the seat side by side that revolves of the and arranged on left and right sides of short tube tube, the fixing respectively forward and backward valve plate that coincide with the short tube barrel shape on the live axle, handle respectively is equipped with in the end of extending the short tube tube at live axle.

2. loose-leaf type Hand-operated butterfly valve according to claim 1 is characterized in that: the rotation end of handle has the limiting board of one, has the circular arc restraining groove on the limiting board, is fixed on the caging bolt that revolves on the seat and passes from restraining groove, is fixed by wing nut.

3. loose-leaf type Hand-operated butterfly valve according to claim 2 is characterized in that: the upper and lower end of short tube tube all has flange.

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