CN112096897A

CN112096897A - Plug valve

Info

Publication number: CN112096897A
Application number: CN202010956964.9A
Authority: CN
Inventors: 陈之现; 马敬磊; 张海英
Original assignee: Ningbo Intelligent Machinery Co ltd
Current assignee: Ningbo Intelligent Machinery Co ltd
Priority date: 2020-09-12
Filing date: 2020-09-12
Publication date: 2020-12-18

Abstract

The invention discloses a plug valve which comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve cover is fixedly arranged at the upper end of the valve cavity of the valve body, an inlet pipe and an outlet pipe which are communicated with the valve cavity are arranged on the side surface of the valve body, and the inlet pipe and the outlet pipe are coaxially arranged; a plug body for controlling the connection and disconnection of the inlet pipe and the outlet pipe is rotationally connected in the valve cavity, and a through flow hole is formed in the plug body; the upper end of the valve cover is fixedly provided with a shell, the upper end of the plug body is provided with a valve rod which penetrates through the valve cover and extends into the shell, one end of the valve rod extending into the shell is fixedly provided with a worm wheel, the upper end of the shell is provided with a motor, and an output shaft of the motor extends into the shell and is coaxial with the worm wheel; a unidirectional rotating assembly is arranged between an output shaft of the motor and the worm wheel; a manual assembly for driving the worm gear to rotate is arranged in the shell; the plug valve is reasonable in structure, and can realize two control modes of electric control and manual control.

Description

Plug valve

Technical Field

The invention belongs to the technical field of pipeline valves, and particularly relates to a plug valve.

Background

The plug valve is a rotary valve in the shape of a closing member or a plunger, and is opened or closed by rotating 90 degrees to make a passage port on the plug communicate with or separate from a passage port on the valve body. The plug valve is a fast-switching straight-through valve, which uses a plug body with a through hole in the middle as a valve of a starting and closing piece, and the plug body rotates along with a valve rod to realize the starting and closing actions. With the development of electric equipment, a large number of manually controlled plug valves are replaced by electric plug valves, the traditional manual plug valves are inconvenient to operate and low in use precision, the electric plug valve can be intelligently and automatically controlled, but the use condition is limited, the manual control and the electric control are required to be switched, however, most of the prior art stopcocks with manual and electric controls are controlled manually only in response to electric inoperability when power is lost, such a single control requires a complicated structure and is liable to be operated erroneously, and if the manual operation is performed after a power failure, the manual control device is damaged if the power is recovered, and the operation of personnel often has carelessness and carelessness, is difficult to control when wholly using, simultaneously is not safe enough and intelligent, still has the space that awaits improvement.

Disclosure of Invention

The invention aims to provide a gate valve which is reasonable in structure and can realize two control modes of electric control and manual control.

In order to achieve the purpose, the invention provides the following technical scheme:

a plug valve comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve cover is fixedly arranged at the upper end of the valve cavity of the valve body, an inlet pipe and an outlet pipe which are communicated with the valve cavity are arranged on the side face of the valve body, and the inlet pipe and the outlet pipe are coaxially arranged; a plug body used for controlling the connection and disconnection of the inlet pipe and the outlet pipe is rotationally connected in the valve cavity, a through flow hole is formed in the plug body, and when the plug valve is opened, two ends of the through flow hole are respectively communicated with the inlet pipe and the outlet pipe; the upper end of the valve cover is fixedly provided with a shell, the upper end of the plug body is provided with a valve rod which penetrates through the valve cover and extends into the shell, one end of the valve rod extending into the shell is fixedly provided with a worm wheel, the upper end of the shell is provided with a motor, and an output shaft of the motor extends into the shell and is coaxial with the worm wheel; a unidirectional rotating assembly is arranged between an output shaft of the motor and the worm wheel; and a manual assembly for driving the worm gear to rotate is arranged in the shell.

Furthermore, the unidirectional rotating assembly comprises a top block, a rotating groove is formed in the upper end of the worm wheel, and an output shaft of the motor extends into the rotating groove and is provided with a rotating disc; the ratchet is arranged on the outer side of the circumference of the rotary table, a sliding groove is formed in the side wall of the rotary groove along the radial direction, the ejector block is connected in the sliding groove in a sliding mode, a first spring used for forcing the ejector block to press the ratchet is arranged in the sliding groove, the worm wheel is driven to rotate when the rotary table rotates clockwise, and the worm wheel is not driven to rotate when the rotary table rotates anticlockwise.

Furthermore, the manual assembly comprises a worm, the worm is arranged in the casing along a direction perpendicular to the valve rod, and the left end and the right end of the worm extend out of the casing; when the worm moves to be close to the left end of the shell, the worm is meshed with the worm wheel, and when the worm moves to be close to the right end of the shell, the worm is disengaged from the worm wheel; and a positioning assembly is arranged in the casing and used for clamping and positioning the worm when the worm moves to the right end close to the casing.

Furthermore, the positioning assembly comprises a positioning block, a positioning plate parallel to the worm is arranged in the casing close to the right end, a shaft rod is arranged in the casing along the axial direction of the valve rod and is positioned between the positioning plate and the worm, the positioning block is rotatably connected to the shaft rod, a limiting bump for preventing the positioning block from rotating leftwards is arranged at the left end of the positioning block close to the positioning plate, and an arc chamfer for facilitating the positioning block to rotate rightwards is arranged at the right end of the positioning block close to the positioning plate; and a spring piece for forcing the positioning block to rotate leftwards is fixedly arranged on the positioning plate.

Furthermore, a handle is fixedly arranged at the right end of the worm extending out of the shell.

Advantageous effects

Compared with the prior art, the technical scheme of the invention has the following advantages:

1. the invention is provided with the motor drive and the manual component drive, realizes the coexistence of two drive modes, and is more flexible to use, and the motor drive regulation and the manual component drive regulation can be directly converted into the manual component control from the motor drive control or into the motor drive control from the manual component control without an independent switching mechanism;

2. when the electric motor is used, the electric drive and the manual drive are independent and do not influence each other, the use is more coherent and safe, and even if the electric motor is electrified suddenly during manual operation, the motor cannot be damaged.

Drawings

FIG. 1 is a sectional view of the present invention, in a manual operation state;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1 illustrating the transfer of the present invention to an electric mode of operation;

fig. 4 is a three-dimensional schematic view of a partially assembled structure according to the present invention.

Detailed Description

Referring to fig. 1-4, the plug valve comprises a valve body 1, a valve cavity is arranged in the valve body 1, a valve cover 3 is fixedly arranged at the upper end of the valve cavity of the valve body 1, an inlet pipe 1a and an outlet pipe 1b which are communicated with the valve cavity are arranged on the side surface of the valve body 1, and the inlet pipe 1a and the outlet pipe 1b are coaxially arranged; a plug body 2 used for controlling the connection and disconnection of the inlet pipe 1a and the outlet pipe 1b is rotationally connected in the valve cavity, a through hole 21 is formed in the plug body 2, and when the plug valve is opened, two ends of the through hole 21 are respectively communicated with the inlet pipe 1a and the outlet pipe 1 b; a shell 4 is fixedly installed at the upper end of the valve cover 3, a valve rod 22 which penetrates through the valve cover 3 and extends into the shell 4 is arranged at the upper end of the plug body 2, a worm wheel 5 is fixedly installed at one end of the valve rod 22 which extends into the shell 4, a motor 6 is arranged at the upper end of the shell 4, and an output shaft 61 of the motor 6 extends into the shell 4 and is coaxial with the worm wheel 5; a unidirectional rotating assembly is arranged between the output shaft of the motor 6 and the worm wheel 5; a manual component for driving the worm wheel 5 to rotate is arranged in the machine shell 4.

The unidirectional rotating assembly comprises a top block 8, the upper end of the worm wheel 5 is provided with a rotating groove 51, and the output shaft of the motor 6 extends into the rotating groove 51 and is provided with a rotating disc 6 a; the outer side of the circumference of the rotating disc 6a is provided with a ratchet 611, the side wall of the rotating groove 51 is provided with a sliding groove 52 along the radial direction, the top block 8 is connected in the sliding groove 52 in a sliding way, a first spring 81 for forcing the top block 8 to press the ratchet 611 is arranged in the sliding groove 52, and the rotating disc 6a drives the worm wheel 5 to rotate when rotating clockwise and does not drive the worm wheel 5 to rotate when rotating anticlockwise.

The manual assembly comprises a worm 7, the worm 7 is arranged in the machine shell 4 along the direction vertical to the valve rod 22, and the left end and the right end of the worm 7 extend out of the machine shell 4; the right end of the worm 7 extending out of the machine shell 4 is fixedly provided with a handle 71. When the worm 7 moves to be close to the left end of the machine shell 4, the worm 7 is meshed with the worm wheel 5, and when the worm 7 moves to be close to the right end of the machine shell 4, the worm 7 is disengaged from the worm wheel 5; and a positioning assembly is arranged in the machine shell 4 and used for clamping and positioning the worm 7 when the worm 7 moves to the right end close to the machine shell 4.

The positioning assembly comprises a positioning block 91, a positioning plate 9 parallel to the worm 7 is arranged in the casing 4 close to the right end, a shaft rod 93 is arranged in the casing 4 along the axial direction of the valve rod 22, the shaft rod 93 is positioned between the positioning plate 9 and the worm 7, the positioning block 91 is rotatably connected to the shaft rod 93, a limiting bump 91a for preventing the positioning block 91 from rotating leftwards is arranged at the left end of the positioning block 91 close to the positioning plate 9, and an arc chamfer 91b for facilitating the positioning block 91 to rotate rightwards is arranged at the right end of the positioning block 91 close to the positioning plate 9; a spring piece 92 for forcing the positioning block 91 to rotate leftwards is fixedly arranged on the positioning plate 9.

When the manual adjustment is carried out, the handle 71 is rotated, so that the worm 7 slides leftwards from the position shown in fig. 3 to a position close to the left end of the machine shell 4 (as shown in fig. 2), the worm 7 is meshed with the worm wheel 5, at the moment, the worm 7 cannot move leftwards continuously, the handle 71 is rotated continuously, the worm wheel 5 is driven to rotate clockwise, and then the plug body 2 can be driven to rotate, so that the opening or closing of the plug body 2 can be controlled; when the worm wheel 5 rotates clockwise, the worm wheel 5 cannot drive the rotating disc 6a to rotate, so that acting force cannot be generated on the motor 6. At the end of the manual adjustment, the handle 71 needs to be turned to slide the worm 7 to a position close to the right end of the housing 4 as shown in fig. 3 to complete the manual operation. If in manual operation, motor 6 is electrified suddenly and drives carousel 6a clockwise rotation, then carousel 6a drives worm wheel 5 through ratchet 611 and kicking block 8 cooperation and rotates, and then pushes worm 7 right through worm wheel 5's clockwise rotation, makes worm 7 break away from mutually with worm wheel 5, can not make manual subassembly damage from this.

When the plug is electrically adjusted, the handle 71 is turned, the worm 7 moves rightwards to a position close to the right end of the machine shell 4 as shown in fig. 3, at the moment, the worm 7 is separated from the worm wheel 5, the positioning block 91 is clamped in the spiral groove of the worm 7, the clamping and positioning of the worm 7 are realized, the motor 6 is electrified to drive the turntable 6a to rotate clockwise, the ejector block 8 is pressed between the ratchets 611 under the action of the first spring 81, and then the worm wheel 5 is driven to rotate through the action of the ratchets 611 and the ejector block 8, so that the plug body 2 can be controlled to rotate to be opened or closed.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A plug valve comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve cover is fixedly arranged at the upper end of the valve cavity of the valve body, an inlet pipe and an outlet pipe which are communicated with the valve cavity are arranged on the side face of the valve body, and the inlet pipe and the outlet pipe are coaxially arranged; a plug body used for controlling the connection and disconnection of the inlet pipe and the outlet pipe is rotationally connected in the valve cavity, a through flow hole is formed in the plug body, and when the plug valve is opened, two ends of the through flow hole are respectively communicated with the inlet pipe and the outlet pipe; the valve plug is characterized in that a casing is fixedly mounted at the upper end of the valve cover, a valve rod penetrating through the valve cover and extending into the casing is arranged at the upper end of the plug body, a worm wheel is fixedly mounted at one end of the valve rod extending into the casing, a motor is arranged at the upper end of the casing, and an output shaft of the motor extends into the casing and is coaxial with the worm wheel; a unidirectional rotating assembly is arranged between an output shaft of the motor and the worm wheel; and a manual assembly for driving the worm gear to rotate is arranged in the shell.

2. The plug valve according to claim 1, wherein the unidirectional rotation assembly comprises an ejector block, a rotary groove is formed in the upper end of the worm gear, and an output shaft of the motor extends into the rotary groove and is provided with a rotary disc; the ratchet is arranged on the outer side of the circumference of the rotary table, a sliding groove is formed in the side wall of the rotary groove along the radial direction, the ejector block is connected in the sliding groove in a sliding mode, a first spring used for forcing the ejector block to press the ratchet is arranged in the sliding groove, the worm wheel is driven to rotate when the rotary table rotates clockwise, and the worm wheel is not driven to rotate when the rotary table rotates anticlockwise.

3. The plug valve of claim 1, wherein the manual assembly comprises a worm, the worm is arranged in the housing in a direction perpendicular to the valve rod, and the left end and the right end of the worm extend out of the housing; when the worm moves to be close to the left end of the shell, the worm is meshed with the worm wheel, and when the worm moves to be close to the right end of the shell, the worm is disengaged from the worm wheel; and a positioning assembly is arranged in the casing and used for clamping and positioning the worm when the worm moves to the right end close to the casing.

4. The plug valve of claim 3, wherein the positioning assembly comprises a positioning block, a positioning plate parallel to the worm is arranged in the housing near the right end, a shaft rod is arranged in the housing along the axial direction of the valve rod and is positioned between the positioning plate and the worm, the positioning block is rotatably connected to the shaft rod, a limiting projection for preventing the positioning block from rotating leftwards is arranged at the left end of the positioning block near the positioning plate, and an arc chamfer for facilitating the positioning block to rotate rightwards is arranged at the right end of the positioning block near the positioning plate; and a spring piece for forcing the positioning block to rotate leftwards is fixedly arranged on the positioning plate.

5. The plug valve of claim 3, wherein the worm is fixedly provided with a handle at a right end extending out of the housing.