CN203627825U

CN203627825U - Butterfly valve

Info

Publication number: CN203627825U
Application number: CN201320840807.7U
Authority: CN
Inventors: 周明龙; 余丙荣; 李文; 程晶晶; 葛壮; 汪伟
Original assignee: Anhui Technical College of Mechanical and Electrical Engineering
Current assignee: Anhui Technical College of Mechanical and Electrical Engineering
Priority date: 2013-12-19
Filing date: 2013-12-19
Publication date: 2014-06-04
Anticipated expiration: 2023-12-19

Abstract

The utility model particularly relates to a butterfly valve which is arranged on a butterfly plate and provided with a sub butterfly plate, and belongs to valve devices. The butterfly valve has the advantages that a valve rod is tubular, a sub valve rod is sleeved with the valve rod, the butterfly plate is provided with a through hole, a guide groove is formed between the through hole and an axial hole of a valve body, the sub butterfly plate is arranged in the guide groove, the sub butterfly plate presses and seals the through hole, and the sub butterfly rod penetrates through the axial hole in the valve body and is connected with the sub butterfly plate. The butterfly valve has the advantages that the sub butterfly plate and the sub butterfly rod are added on the butterfly plate, through starting of the sub butterfly plate, negative pressure is eliminated, and the starting difficulty problem due to large torque is solved; the sub butterfly plate moves in the guide groove, namely the moving direction is parallel with the butterfly plate, the sub butterfly plate is located on the same plane with the butterfly plate all the time, washing of fluid on the sub butterfly plate is reduced, the sub butterfly plate is effectively protected, the overall butterfly valve only needs one set of control device, and the structure is simple.

Description

A kind of butterfly valve

Technical field

The utility model belongs to valving, relates in particular to the butterfly valve of belt butterfly plate on a kind of butterfly plate.

Background technique

At present, industrial valves door type is various, is widely used in the industries such as chemical industry, food, water, electricity, mainly plays Flow-rate adjustment and the cut-off effect of flowing medium.Butterfly valve generally comprises valve body, butterfly plate, valve seat, valve rod, a frame transmission mechanism, butterfly plate seal ring and valve seat insert have the sealing surface cooperatively interacting, butterfly plate is fixedly mounted on valve rod by pin, spool is mounted freely on the valve rod in the main body that embeds flexible seat ring by rotation, in the time that butterfly plate is very large, valve needs driving mechanism that very large moment of torsion is provided while keying.

Publication number provides a kind of butterfly valve for the patent of CN 1782475A, be characterized in that butterfly plate is provided with the through hole that can allow MEDIA FLOW cross, the interior formation of through hole that sub-butterfly plate is arranged on butterfly plate seals, sub-valve rod is connected and fixed through axis hole and sub-butterfly plate in valve body axis hole and valve rod, and rotation valve rod and sub-valve rod manipulate butterfly plate and sub-butterfly plate opens and closes.The large problem of moment of torsion when although this butterfly valve can solve current butterfly valve unlatching, but due in high-pressure fluid pipes, the spool of butterfly valve bears the many pressure larger than stream, and in the time that female butterfly plate is opened completely, sub-butterfly plate is vertical with pipeline, the impact force being subject to is larger, easily damages, in addition, female butterfly plate is different from the opening sequence of sub-butterfly plate, therefore valve rod and sub-valve rod need two sets of operating and controlling equipment, make like this structure of this butterfly valve more complicated, are unfavorable for operation simultaneously.

Model utility content

In order to overcome the defect of prior art, the purpose of this utility model is to provide a kind of butterfly valve, not only can play brokenly the effect of negative pressure, and has effectively protected sub-butterfly plate, simple in structure, solves a difficult problem that is not easy manipulation.

In order to realize above-mentioned effect, the technical solution of the utility model is: a kind of butterfly valve, comprise valve body, butterfly plate, handle and valve rod, be characterized in described valve rod in a tubular form, sheathed sub-valve rod in valve rod, establishes through hole on butterfly plate, between through hole and the axis hole of valve body, establish guide groove, in guide groove, establish sub-butterfly plate, sub-butterfly plate gland, be sealed on through hole, sub-valve rod is connected with sub-butterfly plate through the axis hole of valve body.

The utility model further improves, and the upper end of described sub-valve rod is provided with screw thread, and the length of screw thread is greater than the length of guide groove.

The utility model further improves, and the diameter of described sub-butterfly plate is greater than the diameter of through hole.

The utility model further improves, and is provided with one group of pin-and-hole on described valve rod, and every group of pin-and-hole has six at least, is evenly distributed on valve rod.

The utility model further improves, and is provided with one group of corresponding pin-and-hole, and is provided with tapped hole on described handle.

Compared with prior art, advantage is: this butterfly valve installs sub-butterfly plate and sub-valve rod additional on butterfly plate, by the unlatching of sub-butterfly plate, realizes and abolishes negative pressure, has solved the unlatching difficult problem causing greatly because of moment of torsion; Sub-butterfly plate moves in guide groove, and moving direction is parallel with butterfly plate, all the time with butterfly plate at grade, reduced washing away of fluid antithetical phrase butterfly plate, effectively protect sub-butterfly plate, make whole butterfly valve only need adopt a sets of operating and controlling equipment simultaneously, simple in structure.

Accompanying drawing explanation

Fig. 1 is the utility model embodiment's structural representation;

Fig. 2 is the utility model embodiment's use schematic diagram;

Fig. 3 is that the A-A of Fig. 1 is to view.

In figure: 1-handle, 2-bearing pin, 3-valve rod, 4-guide groove, 5-butterfly plate, 6-valve rod, 7-valve body, 8-butterfly plate, 9-through hole.

Embodiment

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

Embodiment as shown in Figure 1, a kind of butterfly valve, comprise valve body 7, butterfly plate 8, handle 1 and valve rod 3, in a tubular form, sheathed sub-valve rod 6 in valve rod, establishes through hole 9 to described valve rod on butterfly plate, between through hole and the axis hole of valve body, establish guide groove 4, in guide groove, establish sub-butterfly plate 5, sub-butterfly plate gland, be sealed on through hole, sub-valve rod is connected with sub-butterfly plate through the axis hole of valve body.

As shown in Figure 2, the upper end of described sub-valve rod 6 is provided with screw thread, and the length of screw thread is greater than the length of guide groove 4, can couple together by the tapped hole directly and on handle 1.In the time that the pressure reduction at butterfly plate two ends in pipeline is very large, make butterfly valve moment of torsion large, open difficulty, now, handle 1 is not connected with bearing pin 2 with valve rod 3, and handle with sleeve 1 only has sub-valve rod 6 to do radial motion, and sub-butterfly plate 5 moves along guide groove 4, open through hole 9, the pressure reduction at balance two ends, moment of torsion reduces greatly.The diameter of sub-butterfly plate 5 being designed to be greater than to the diameter of through hole 9, is the effect for better its road sealing.

After through hole is opened, with bearing pin 2 fixed handles 1 and valve rod 3, bearing pin has six at least, be evenly distributed on valve rod, be rotated further handle 1, sub-butterfly plate is along with butterfly plate is done axial motion, until butterfly plate 8 is opened completely, sub-butterfly plate and butterfly plate all the time at grade, have reduced washing away of fluid antithetical phrase butterfly plate.

Equally, the closing process of butterfly valve is just contrary with unlatching, first handle with sleeve 1, and butterfly plate 8 is closed, and because through hole is also in open mode, bearing pin 2 is taken out, and handle 1 disconnects with valve rod 3, is rotated further handle 1 until sub-butterfly plate 5 is closed.

Claims

1. a butterfly valve, comprise valve body (7), butterfly plate (8), handle (1) and valve rod (3), it is characterized in that: described valve rod in a tubular form, sheathed sub-valve rod (6) in valve rod, on butterfly plate, establish through hole (9), between through hole and the axis hole of valve body, establish guide groove (4), in guide groove, establish sub-butterfly plate (5), sub-butterfly plate gland, be sealed on through hole, sub-valve rod is connected with sub-butterfly plate through the axis hole of valve body.

2. butterfly valve according to claim 1, is characterized in that: the upper end of described sub-valve rod (6) is provided with screw thread, and the length of screw thread is greater than the length of guide groove (4).

3. butterfly valve according to claim 1 and 2, is characterized in that: the diameter of described sub-butterfly plate (5) is greater than the diameter of through hole (9).

4. butterfly valve according to claim 1 and 2, is characterized in that: on described valve rod (3), be provided with one group of pin-and-hole, every group of pin-and-hole has six at least, is evenly distributed on valve rod (3).

5. butterfly valve according to claim 1 and 2, is characterized in that: on described handle (1), be provided with one group of corresponding pin-and-hole, and be provided with tapped hole.