CN212155832U

CN212155832U - Ventilation butterfly valve

Info

Publication number: CN212155832U
Application number: CN202020011609.XU
Authority: CN
Inventors: 叶朝辉; 肖开勇
Original assignee: Jiangsu Canan Valve Manufacturing Co ltd
Current assignee: Jiangsu Canan Valve Manufacturing Co ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-12-15
Anticipated expiration: 2030-01-03

Abstract

The utility model provides a ventilation butterfly valve, which comprises a valve body, wherein a rotating shaft is arranged in the valve body, a butterfly valve driving device is arranged at the upper end of the rotating shaft, and a valve plate is fixed on the rotating shaft; the bottom end of the rotating shaft extends out of the valve body and is provided with a mechanical pointer, the mechanical pointer comprises a fixed disc, a connecting column, a thick pointer and a thin pointer, the fixed disc is fixed on the valve body, the connecting column is fixedly connected with the rotating shaft, the lower side of the connecting column extends out of a through hole in the fixed disc, the thick pointer is positioned below the fixed disc and is fixedly connected with the connecting column, the thick pointer and the valve plate have the same direction, the end part of the thick pointer horizontally extends out of the fixed disc, and the thick pointer can rotate along; the fixed disk is provided with an arc-shaped pointer hole, the pointer hole and the connecting column share the axis, the fixed disk is printed with a row of scales along the arc-shaped edge of the pointer hole, the thick pointer is provided with a thin pointer, the thin pointer can extend out of the pointer hole, and the tip of the thin pointer points to the scales. The utility model discloses can indicate the aperture under adverse circumstances reliable and stable.

Description

Ventilation butterfly valve

Technical Field

The utility model belongs to the technical field of the valve, concretely relates to ventilation butterfly valve.

Background

The ventilation butterfly valve is mainly used for a ventilation pipeline and can be divided into a cut-off type and an adjusting type according to specific functions, wherein the adjusting type ventilation butterfly valve plays a role in flow adjustment in a ventilation system. The adjusting type ventilation butterfly valve needs to be matched with a valve opening digital display meter to display the opening of the valve on site, however, the valve opening digital display meter is configured to increase purchasing cost. And when the valve opening digital display meter is used for a long time under severe conditions such as high temperature and high humidity or circuit faults occur, the valve opening digital display meter is difficult to work stably and reliably, the indicating precision is influenced, and the service life is short.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can indicate ventilation butterfly valve of aperture under the high temperature and high humidity condition reliable and stable.

The utility model provides a following technical scheme:

a ventilation butterfly valve comprises a valve body, wherein a rotating shaft is arranged in the valve body, the upper end and the lower end of the rotating shaft respectively extend out of the valve body in a straight line, a butterfly valve driving device is arranged at the upper end of the rotating shaft, and a valve plate matched with the inner cavity wall of the valve body is fixed on the rotating shaft; the bottom end of the rotating shaft is provided with a mechanical pointer, the mechanical pointer comprises a fixed disc, a connecting column, a thick pointer and a thin pointer, the fixed disc is horizontally fixed on the valve body through bolts, a through hole matched with the connecting column is formed in the fixed disc, the connecting column is fixedly connected with the rotating shaft, the lower side of the connecting column extends out of the through hole, the thick pointer is located below the fixed disc and is fixedly connected with the connecting column, the thick pointer and the valve plate point to the same direction, the thick pointer can rotate along with the rotating shaft, and the end part of the thick pointer horizontally extends out of the fixed disc; the fixed disk is provided with an arc-shaped pointer hole, the pointer hole and the connecting column are coaxial, a row of scales are printed on the fixed disk along the arc-shaped edge of the pointer hole, the thick pointer is provided with the thin pointer, the thin pointer can extend out of the pointer hole, and the tip of the thin pointer points to the scales.

Preferably, the thin pointer comprises a needle pillar and an indicating sheet, the needle pillar is welded on the thick pointer, and the needle pillar can move along the pointer hole; the indicating sheet is arranged at the top of the needle post through a screw, is triangular and covers the upper surface of the needle hole.

Preferably, a noise reduction gap is left between the indicating sheet and the fixed disk in the height direction.

Preferably, the end part of the thick pointer is provided with a fixing ring, the fixing ring is sleeved on the connecting column, and the fixing ring is connected with the connecting column through a screw.

Preferably, the bottom end of the rotating shaft extends out of the valve body and then is fixedly connected with a limiting column, the diameter of the limiting column is larger than that of the rotating shaft and larger than that of the connecting column, and the bottom end of the limiting column is fixedly connected with the connecting column; the fixed disc is abutted to the bottom end face of the limiting column.

Preferably, the rotating shaft, the limiting column and the connecting column are coaxially arranged.

Preferably, the fixed disc is fixedly connected with the valve body through a countersunk head bolt.

The utility model has the advantages that:

the utility model discloses install mechanical pointer on the valve body of pivot, carry out physical indication to the aperture of valve plate, indicate the action reliably effective continuously, be applicable to the operating condition of high temperature and high humidity, and do not receive the influence of external circuit trouble problem, long service life.

The fixed disk of this butterfly valve passes through on the bolt fastening is in the valve body, sets up on the fixed disk and indicates pinhole and scale, and the pointer includes thick pointer and thin pointer, thick pointer fixed connection pivot, and outside the fixed disk was extended horizontally to the tip of thick pointer, consequently when the accurate aperture that need not read the butterfly valve, can judge the aperture of valve plate roughly through the tip position of observing thick pointer. The thin pointer is fixed on the thick pointer and can move along the pointer hole, and the tip of the thin pointer points to the scale, so that the opening degree of the valve plate can be accurately read through the thin pointer. The butterfly valve is provided with the thick pointer and the thin pointer to meet different working condition requirements, and is flexible to use and high in applicability.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic top view of the mechanical pointer of the present invention;

FIG. 3 is a schematic view of the installation structure of the thin pointer of the present invention;

labeled as: 1. a valve body; 2. a rotating shaft; 3. a butterfly valve drive; 4. a valve plate; 5. fixing the disc; 6. connecting columns; 7. a coarse pointer; 8. a thin pointer; 9. a fixing ring; 10. a finger hole; 11. calibration; 12. a needle cylinder; 13. an indicator sheet; 14. a noise reduction gap; 15. a limiting column; 16. a countersunk head bolt.

Detailed Description

As shown in fig. 1, a ventilation butterfly valve comprises a valve body 1, a rotating shaft 2 is installed in the valve body 1, the upper end and the lower end of the rotating shaft 2 respectively extend out of the valve body 1 in a straight line, a butterfly valve driving device 3 is installed at the upper end of the rotating shaft 2, the butterfly valve driving device 3 is a known device, for example, a common single/double-acting hydraulic driving head, a hand wheel type driving head and the like can be adopted, a valve plate 4 matched with the inner cavity wall of the valve body 1 is fixed on the rotating shaft 2, the rotating shaft 2 is driven to rotate through the butterfly valve driving device 3, and then the valve plate 4 is driven to.

As shown in fig. 1 and 2, a mechanical pointer is installed at the bottom end of the rotating shaft 2 and comprises a fixed disk 5, a connecting column 6, a thick pointer 7 and a thin pointer 8, the fixed disk 5 is installed below the valve body 1 through bolts, the fixed disk 5 is horizontally arranged, a through hole matched with the connecting column 6 is formed in the fixed disk 5, the connecting column 6 is fixedly connected with the rotating shaft 2, and the lower side of the connecting column 6 extends out of the through hole. The thick pointer 7 is located below the fixed disc 5, the end portion of the thick pointer is provided with a fixing ring 9, the fixing ring 9 is sleeved on the connecting column 6, the fixing ring 9 is fixedly connected with the connecting column 6 through screws, therefore, the thick pointer 7 can rotate along with the rotating shaft 2, the other end of the thick pointer 7 horizontally extends out of the fixed disc 5, and the opening degree of the valve plate 4 can be roughly judged by observing the end portion position of the thick pointer 7. The coarse pointer 7 points in the same direction as the valve plate 4, so that the angular position of the valve plate 4 in the valve body 1 can be indicated more intuitively by the coarse pointer 7.

An arc-shaped pointer hole 10 is formed in the fixed disc 5, the pointer hole 10 and the connecting column 6 share the same axis, a row of scales 11 are printed on the fixed disc 5 along the arc-shaped edge of the pointer hole 10, the thick pointer 7 is provided with the thin pointer 8, the thin pointer 8 can extend out of the pointer hole 10 upwards, and the tip of the thin pointer 8 points to the scales 11, so that the valve plate opening can be accurately indicated.

Specifically, as shown in fig. 3, the thin pointer 8 includes a needle post 12 and an indication sheet 13, the needle post 12 is welded on the thick pointer 7, the needle post 12 is located in the pointer hole 10 and can move along the pointer hole 10; the indicating sheet 13 is installed on the top of the needle cylinder 12 by a screw, the indicating sheet 13 is triangular, and the scale is accurately indicated by the tip of the indicating sheet 13. The indication sheet 13 is covered on the upper surface of the finger hole 10 so that the tip thereof can be partially overlapped with the scale mark, thereby indicating the scale mark more intuitively. A noise reduction gap 14 is reserved between the indication sheet 13 and the fixed disc 5 in the height direction, so that the noise caused by sliding friction between the indication sheet 13 and the fixed disc 5 when the pointer moves is avoided.

As shown in fig. 1, the bottom end of the rotating shaft 2 extends out of the valve body 1 and then is fixedly connected with a limiting column 15, the diameter of the limiting column 15 is larger than that of the rotating shaft 2 and larger than that of the connecting column 6, the bottom end of the limiting column 15 is fixedly connected with the connecting column 6, and preferably, the rotating shaft 2, the limiting column 15 and the connecting column 6 are integrally formed. The rotating shaft 2, the limiting column 15 and the connecting column 6 are all coaxially arranged. The fixing plate 5 abuts against the bottom end face of the limiting column 15, so that the limiting column 15 can position the fixing plate 5 in the longitudinal direction to prevent the fixing plate 5 from shaking up and down.

The fixed disc 5 is fixedly connected with the valve body 1 through a countersunk head bolt 16, and the countersunk head bolt 16 cannot prevent the thick pointer 7 from freely rotating in a horizontal plane.

When the butterfly valve works, the butterfly valve driving device 3 at the top of the valve body 1 drives the rotating shaft 2 to rotate, so that the valve plate 4 rotates by an angle, the rotating shaft 2 drives the thick pointer 7 and the thin pointer 8 to synchronously rotate, and the thick pointer 7 and the valve plate 4 point to the same direction, so that when the opening degree of the valve is only needed to be known approximately, the opening position of the valve plate 4 in the valve body can be visually embodied by observing the end position of the thick pointer 7; when the opening degree of the valve needs to be accurately read, the scale value indicated by the thin pointer 8 is observed.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ventilation butterfly valve is characterized by comprising a valve body, wherein a rotating shaft is arranged in the valve body, the upper end and the lower end of the rotating shaft respectively extend out of the valve body in a straight line, a butterfly valve driving device is arranged at the upper end of the rotating shaft, and a valve plate matched with the inner cavity wall of the valve body is fixed on the rotating shaft; the bottom end of the rotating shaft is provided with a mechanical pointer, the mechanical pointer comprises a fixed disc, a connecting column, a thick pointer and a thin pointer, the fixed disc is horizontally and fixedly connected below the valve body, the fixed disc is provided with a through hole matched with the connecting column, the connecting column is fixedly connected with the rotating shaft, and the lower side of the connecting column extends out of the through hole; the thick pointer is positioned below the fixed disc and is fixedly connected with the connecting column, the thick pointer and the valve plate point to the same direction, and the end part of the thick pointer horizontally extends out of the fixed disc; be equipped with curved pointer hole on the fixed disk, point the pinhole with the spliced pole coaxial, along on the fixed disk the arc edge of pointing the pinhole has printed one row of scale, install on the thick pointer thin pointer, thin pointer can upwards stretch out point the pinhole, the pointed end of thin pointer points to the scale.

2. The ventilation butterfly valve of claim 1, wherein the fine pointer comprises a pin and an indicator tab, the pin being welded to the coarse pointer, the pin being movable along the pin hole; the indicating sheet is arranged at the top of the needle post through a screw, is triangular and covers the upper surface of the needle hole.

3. The ventilation butterfly valve of claim 2, wherein a noise reduction gap is left between the indicator piece and the fixed disk in a height direction.

4. The ventilation butterfly valve according to claim 3, wherein a fixing ring is arranged at the end of the thick pointer, the fixing ring is sleeved on the connecting column, and the fixing ring is connected with the connecting column through a screw.

5. The ventilation butterfly valve according to claim 4, wherein a bottom end of the rotating shaft extends out of the valve body and is fixedly connected with a limiting column, the diameter of the limiting column is larger than that of the rotating shaft and larger than that of the connecting column, and the bottom end of the limiting column is fixedly connected with the connecting column; the fixed disc is abutted to the bottom end face of the limiting column.

6. The ventilation butterfly valve of claim 5, wherein the shaft, the retaining post, and the connecting post are all coaxially disposed.

7. The ventilation butterfly valve of claim 1, wherein the fixed disk is fixedly connected to the valve body by a countersunk bolt.