CN111336309A

CN111336309A - Switch device for gate valve

Info

Publication number: CN111336309A
Application number: CN201811558861.6A
Authority: CN
Inventors: 张善链; 章文忠
Original assignee: Hubei Taihe Petrochemical Equipment Co ltd
Current assignee: Hubei Taihe Petrochemical Equipment Co ltd
Priority date: 2018-12-19
Filing date: 2018-12-19
Publication date: 2020-06-26

Abstract

The invention provides a switching device for a gate valve, which comprises a valve body, a valve plate and a valve rod, wherein a gate valve cap is arranged at the upper end of the valve body, a supporting block is arranged at the top in the gate valve cap, a spring groove with a downward opening is formed in the lower side of the supporting block, through holes for the valve rod to pass through are formed in the supporting block and the gate valve cap, a limiting plate is arranged on the valve rod, a compression spring is arranged between the limiting plate and the bottom of the spring groove, a rack is arranged on the valve rod and is meshed with an incomplete gear, a rotating shaft of the incomplete gear is. The device is simple to operate and high in switching speed.

Description

Switch device for gate valve

Technical Field

The invention belongs to the technical field of valves, and particularly relates to a switching device for a gate valve.

Background

At present, a gate valve is widely applied to pipelines in industries such as petroleum, chemical industry, pharmacy, metallurgy, coal, power industry, urban water supply and drainage and the like, is used for controlling circulation and cutoff of pipeline media, and is one of the most widely applied valves in various fluid conveying engineering. The gate valve is a starting and closing piece, and the valve plate moves along the center vertical direction, and moves upwards to be opened and moves downwards to be closed. When the rising stem gate valve drives the nut to do circular motion by the hand wheel, the valve stem drives the valve plate to do linear motion, so that the valve plate is opened and closed, and the gate valve meets the opening and closing functions. When the switching operation of gate valve frequently carried out to needs, the mode that uses the screw rod to drive the flashboard motion is then comparatively hard, can not judge the on-off state of valve in appearance moreover.

Disclosure of Invention

The invention aims to provide a switching device for a gate valve, which is simple to operate and high in switching speed.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a switching device for gate valve, includes valve body, valve plate and valve rod, and the valve body upper end is equipped with the floodgate valve cap, the top is equipped with the supporting shoe in the floodgate valve cap, and the supporting shoe downside is equipped with downward open-ended spring groove, is equipped with the through-hole that supplies the valve rod to pass on supporting shoe and the floodgate valve cap, is equipped with the limiting plate on the valve rod, is equipped with pressure spring between limiting plate and the spring groove bottom, is equipped with the rack on the valve rod, rack and incomplete gear engagement, and the pivot of incomplete gear is rotated and is installed.

In a preferable scheme, the upper end of the valve rod is provided with scale marks.

In the preferred scheme, the two sides of the upper end of the valve rod are provided with supporting blocks, the valve rod is provided with a mounting groove matched with the supporting blocks, and a spring is arranged between the supporting blocks and the mounting groove.

In the preferred scheme, the handle is provided with a limiting through hole, the gate valve cap is provided with a limiting hole, and the limiting pin is inserted into the limiting through hole and the limiting hole to limit the handle.

In the preferred scheme, the side wall of the spring groove is provided with a sliding groove, and two ends of the limiting plate slide along the sliding groove.

According to the switching device for the gate valve, the valve rod is driven to move upwards through the meshing of the incomplete gear and the rack, the valve is opened, and the compression spring is extruded at the same time, so that the energy storage of the compression spring is realized; the incomplete gear continues to rotate, the incomplete gear 1 is not meshed with the rack, the valve plate moves downwards under the action of the compression spring, the valve is closed, the opening and closing speed of the valve can be increased through the opening and closing device, and the opening and closing device is particularly suitable for frequent opening and closing of the valve.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

fig. 1 is a schematic structural view of the present invention when opened.

FIG. 2 is a schematic view of the closed structure of the present invention.

FIG. 3 is a schematic view of the mounting of the support block.

Fig. 4 is an installation schematic diagram of a spacing pin.

In the figure: the valve comprises a valve body 1, a valve plate 2, a valve rod 3, a gate valve cap 4, a supporting block 5, a spring groove 6, a limiting plate 7, a compression spring 8, a rack 9, an incomplete gear 10, a handle 11, scale marks 12, a supporting block 13, a mounting groove 14, a spring 15, a limiting through hole 16, a limiting hole 17, a limiting pin 18 and a sliding groove 19.

Detailed Description

Example 1: as shown in fig. 1-2, a switching device for gate valve, including valve body 1, valve plate 2 and

valve rod

3, 1 upper end of valve body is equipped with floodgate valve cap 4, the top is equipped with supporting shoe 5 in the

floodgate valve cap

4, and 5 downside of supporting shoe are equipped with downwardly opening's spring groove 6, are equipped with the through-hole that supplies valve rod 3 to pass on supporting shoe 5 and the floodgate valve cap 4, are equipped with limiting plate 7 on the

valve rod

3, and 7 levels of limiting plate set up, are equipped with pressure spring 8 between limiting plate 7 and the 6 bottoms in spring groove, are equipped with rack 9 on the valve rod 1, and rack 9 and incomplete gear 10 mesh, and the pivot of incomplete gear 10 is rotated and is installed on floodgate valve cap.

When the valve is used, as shown in fig. 1, the incomplete gear 10 is rotated to drive the rack 9 to move upwards, so that the valve rod 3 is driven to move upwards, the valve plate 2 moves upwards, the valve is opened, and meanwhile, the limiting plate 7 moves upwards to extrude the compression spring 8; as shown in fig. 2, the incomplete gear 10 is rotated continuously, the toothless part of the incomplete gear 10 is disengaged from the rack 9, and the rack 9 moves downwards under the action of the pressure spring 8, so that the valve plate 2 moves downwards to realize the closing of the valve. The switching device can improve the opening and closing speed of the valve and is particularly suitable for frequently opening and closing the valve.

The upper end of the valve rod 3 is provided with scale marks 12. The distance of the upward movement of the valve rod 3 is judged through the scale marks 12, so that the opening and closing state and the opening size of the valve are judged.

As shown in fig. 4, a limiting through hole 16 is formed in the handle 11, a limiting hole 17 is formed in the gate valve cap 4, and a limiting pin 18 is inserted into the limiting through hole 16 and the limiting hole 17 to limit the handle 11.

When the valve is in a fully opened state, the limiting hole 17 corresponds to the limiting through hole 16, and the locking of the valve is realized by simultaneously inserting the pin 18 into the limiting through hole 16 and the limiting hole 17. On one hand, the valve can be in a fully opened state, and on the other hand, the valve is closed due to misoperation of the handle 11.

The lateral wall of the spring groove 6 is provided with a sliding groove 19, and two ends of the limiting plate 7 slide along the sliding groove 19. The limiting plate 7 is limited by the sliding groove 19.

Example 2: as shown in fig. 1 to 3, support blocks 13 are arranged on two sides of the upper end of the valve rod 3, an installation groove 14 matched with the support blocks 13 is arranged on the valve rod 1, and a spring 15 is arranged between the support blocks 13 and the installation groove 14.

When the position of the supporting block 13 arranged on the valve rod 1 is in a through hole through which the valve rod 1 passes by the supporting block 5, the supporting block 13 extrudes the spring 15, the spring 15 is in a pressing state, the valve rod 1 moves upwards along with the rotation of the incomplete gear 10, when the supporting block 13 is positioned on the upper side of the gate valve cap 4, the supporting block 13 extends out of the mounting groove 14 due to the elastic force of the spring 15, the incomplete gear 10 continues to rotate, the incomplete gear 10 is disengaged from the rack 9, the valve rod 1 moves downwards under the action of the pressing spring 8, the valve rod 1 stops moving downwards due to the limiting effect of the supporting block 13, at the moment, the valve is in a completely opened state, and the supporting block; when the valve needs to be closed, the supporting block 13 is pressed towards the direction of the mounting groove 14, the supporting block 14 is pressed into the mounting groove 14, and the valve rod 1 moves downwards under the action of the compression spring 8, so that the valve is closed.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.

Claims

1. The utility model provides a switching device for gate valve, includes valve body (1), valve plate (2) and valve rod (3), and valve body (1) upper end is equipped with floodgate valve cap (4), its characterized in that: the top is equipped with supporting shoe (5) in floodgate valve cap (4), supporting shoe (5) downside is equipped with downward open-ended spring groove (6), be equipped with the through-hole that supplies valve rod (3) to pass on supporting shoe (5) and floodgate valve cap (4), be equipped with limiting plate (7) on valve rod (3), be equipped with pressure spring (8) between limiting plate (7) and spring groove (6) bottom, be equipped with rack (9) on valve rod (1), rack (9) and incomplete gear (10) meshing, the pivot of incomplete gear (10) is rotated and is installed on floodgate valve cap (4), the pivot one end of incomplete gear (10) is equipped with handle (11).

2. The opening and closing apparatus for a gate valve according to claim 1, wherein: the upper end of the valve rod (3) is provided with scale marks (12).

3. The opening and closing apparatus for a gate valve according to claim 1, wherein: supporting blocks (13) are arranged on two sides of the upper end of the valve rod (3), a mounting groove (14) matched with the supporting blocks (13) is formed in the valve rod (1), and a spring (15) is arranged between the supporting blocks (13) and the mounting groove (14).

4. The opening and closing apparatus for a gate valve according to claim 1, wherein: be equipped with spacing through-hole (16) on handle (11), be equipped with spacing hole (17) on floodgate valve cap (4), spacing pin (18) insert spacing through-hole (16) and spacing hole (17) and carry out spacingly to handle (11).

5. The opening and closing apparatus for a gate valve according to claim 1, wherein: the side wall of the spring groove (6) is provided with a sliding groove (19), and two ends of the limiting plate (7) slide along the sliding groove (19).