CN112664674B

CN112664674B - Novel pneumatic valve

Info

Publication number: CN112664674B
Application number: CN202110021724.4A
Authority: CN
Inventors: 蒋洪琴; 蒋友丁
Original assignee: Ningbo Hailan Pneumatic Co ltd
Current assignee: Ningbo Hailan Pneumatic Co ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2023-07-04
Anticipated expiration: 2041-01-08
Also published as: CN112664674A

Abstract

The utility model relates to the technical field of pneumatic valve devices, in particular to a novel pneumatic valve which comprises a valve body, a hemispherical valve core, an elastic connecting part, a driving shaft, a pneumatic mechanism and a rotary handle, wherein the valve body is provided with a valve seat; the valve body consists of a throat pipe with a waist-round cross section and a communicating pipe connected with the controlled pipeline; the hemispherical valve core is provided with a pair of hemispherical valve cores which are oppositely arranged and are elastically connected with two sides of the elastic connecting part; the elastic connecting parts are arranged at the upper end and the lower end of the valve body and are rotationally connected with the valve body, and two sides of the elastic connecting parts are respectively and elastically connected with a pair of hemispherical valve cores along the direction which is perpendicular to the axis and is far away from the axis; the driving shaft is rotationally connected with the fixed end of the pneumatic mechanism, is in plug-in fit with the top end of the elastic connecting part and is fixedly connected in the circumferential direction; the pneumatic mechanism is arranged at the top of the valve body, and the output end of the pneumatic mechanism is meshed with the driving shaft; the rotary handle is arranged at the top end of the driving shaft extending out of the pneumatic mechanism; the scheme has good sealing effect and long service life, and is suitable for different use scenes.

Description

Novel pneumatic valve

Technical Field

The utility model relates to the technical field of pneumatic valve devices, in particular to a novel pneumatic valve.

Background

Pneumatic valves are valves that are actuated by compressed air. The pneumatic valve can meet the purchasing requirement only by defining the specification, the category and the working pressure, and can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The ball valve pneumatic valve is one of the pneumatic valves.

The ball valve can be tightly closed by only rotating by 90 degrees and small rotating moment. The inner cavity of the valve body which is completely equal provides a flow passage with small resistance and straight through for the medium. Ball valves are generally considered to be most suitable for direct opening and closing use, but recent developments have designed ball valves to have the purpose of throttling and controlling flow. The ball valve has the main characteristics of compact structure, easy operation and maintenance, suitability for common working mediums such as water, solvents, acid, natural gas and the like, and also suitable for mediums with severe working conditions such as oxygen, hydrogen peroxide, methane, ethylene and the like. The ball valve body can be integral or combined.

The protection device of the pneumatic valve and the pneumatic valve disclosed in the Chinese patent No. 205298810U are single in structure, and gaps can be formed due to abrasion after the ball valve is used for a long time, so that the tightness is seriously affected.

Disclosure of Invention

1. Technical problem to be solved

The utility model aims at the defects in the prior art, provides a novel pneumatic valve, and solves the problems that in the prior art, the ball valve is single in structure, gaps can occur due to abrasion after long-time use, and the tightness is seriously affected.

2. Technical proposal

In order to solve the technical problems, the utility model provides a novel pneumatic valve, which comprises a valve body, a hemispherical valve core, an elastic connecting part, a driving shaft, a pneumatic mechanism and a rotating handle;

the valve body consists of a throat pipe with a waist-round cross section and a communicating pipe connected with the controlled pipeline;

the hemispherical valve core is provided with a pair of hemispherical valve cores, the hemispherical valve cores are oppositely arranged and are elastically connected with two sides of the elastic connecting part, the diameter of the hemispherical valve core is larger than that of communicating pipes at two sides of the valve body, the outer wall of the hemispherical valve core is in interference fit with the communicating pipes at two sides of the valve body in a valve closing state, and the hemispherical valve cores are mutually attached to form a spherical structure with a through hole in the middle in a valve opening state;

the elastic connecting parts are arranged at the upper end and the lower end of the valve body, are rotationally connected with the valve body, and are respectively and elastically connected with a pair of hemispherical valve cores along the direction perpendicular to the direction away from the axis, so that the two hemispherical valve cores are mutually separated to realize normally closed valve;

the driving shaft is rotationally connected with the fixed end of the pneumatic mechanism, is in plug-in fit with the top end of the elastic connecting part and is fixedly connected in the circumferential direction, and the driving shaft is used for driving the elastic connecting part to rotate;

the pneumatic mechanism is arranged at the top of the valve body, and the output end of the pneumatic mechanism is meshed with the driving shaft and is used for controlling the driving shaft to do circumferential rotation;

the rotary handle is arranged at the top end of the driving shaft extending out of the pneumatic mechanism and is used for manually controlling the valve.

Preferably, the valve body is provided with a first abutting surface, a second abutting surface, a flange connecting sheet and a sealing bottom cover;

the first abutting surfaces are symmetrically arranged on two sides of the central position of the valve body and are used for abutting the outer sides of the hemispherical valve cores so as to achieve mutual approaching of the hemispherical valve cores;

the second abutting surface is arranged at the top end and the bottom end in the valve body, is attached to the upper end and the lower end of the hemispherical valve core and is used for matching with the horizontal sliding of the hemispherical valve core;

the flange connecting sheets are arranged at the end parts of the communicating pipes at the two sides of the valve body and are used for connecting the valve body to a controlled pipeline;

and the sealing bottom cover is arranged at the bottom of the central position of the valve body and below the bottom of the elastic connecting part and used for ensuring the tightness of the interior of the valve body.

Preferably, the hemispherical valve core is provided with a third abutting surface, a fourth abutting surface, a sliding block and a groove;

the third abutting surface is arranged on the outer walls of the pair of half ball valve cores, which are away from each other, and is of a circular plane structure and used for plugging communicating pipes on two sides of the valve body in a closed state;

the fourth abutting surface is arranged at the top and the bottom of the third abutting surface and used for being attached to the top end and the bottom end of the inner part of the valve body in a sliding manner;

the sliding blocks are symmetrically arranged at the top end and the bottom end of the hemispherical valve core, are in sliding connection with the elastic connecting parts and are used for limiting and guiding the movement of the hemispherical valve core;

grooves are formed in the top end and the bottom end of the hemispherical valve core and used for inserting two sides of the elastic connecting part.

Preferably, the elastic connecting part comprises a first elastic connecting part, a second elastic connecting part and a prismatic docking rod;

the first elastic connecting part is rotationally connected with the top end of the valve body, two ends of the first elastic connecting part are respectively and elastically connected with the pair of hemispherical valve cores, and the first elastic connecting part is arranged at the middle gap of the pair of hemispherical valve cores and is used for providing elastic force expanding towards two ends for the pair of hemispherical valve cores;

the second elastic connecting part is rotationally connected with the bottom end of the valve body, is symmetrically arranged with the first elastic connecting part about the hemispherical valve core, has the same structure as the first elastic connecting part, and has the same axis as the axis of the first elastic connecting part, so as to provide elastic force expanding towards two ends for the hemispherical valve core in cooperation with the first elastic connecting part;

the prismatic butt joint rod is arranged at the top end of the first elastic connecting part and is in plug-in fit with the bottom of the driving shaft, and is used for connecting the first elastic connecting part and the driving shaft together and fixing the first elastic connecting part and the driving shaft with each other in the circumferential direction.

Preferably, the first elastic connecting part comprises a rotating seat, a fixed block, a guide pillar, a spring and a chute;

the rotating seat is rotationally connected with the top end of the valve body, and the top end of the rotating seat is fixedly connected with the prismatic docking rod and coaxially arranged;

the fixed block is arranged at the central position of the bottom of the rotating seat, and the end surfaces of the two sides face to a pair of hemispherical valve cores respectively;

the guide posts are vertically arranged on the end surfaces of two sides of the guide posts;

the spring is sleeved on the guide post, one end of the spring is abutted with the end face of the fixed block, and the other end of the spring is abutted with the top of the hemispherical valve core and is used for providing outward expansion and separation elastic force for the hemispherical valve core;

the sliding groove is arranged at the bottom end of the rotating seat along the movement direction of the hemispherical valve core, is in sliding connection with the top ends of the hemispherical valve cores and is used for guiding and limiting the movement of the hemispherical valve core.

Preferably, the driving shaft comprises a plug-in part, a tooth socket and an extension part; the inserting part, the tooth groove and the extension part are coaxially and sequentially arranged from top to bottom, a slot which is inserted into the top end of the elastic connecting part is arranged at the bottom of the inserting part, the tooth groove is meshed with the output end of the pneumatic mechanism, the inserting part is rotationally connected with the bottom end of the pneumatic mechanism, and the extension part is rotationally connected with the top end of the pneumatic mechanism and extends to the outside of the pneumatic mechanism to be fixedly connected with the rotary handle.

Preferably, the pneumatic mechanism comprises a flange connecting pipe, a driving bin, a first piston assembly, a second piston assembly, a driving rod and a control assembly;

the bottom end of the flange connecting pipe is connected with the top end of the valve body and is rotationally connected with the driving shaft so as to install the pneumatic mechanism on the top of the valve body;

the driving bin is arranged at the top end of the flange connecting pipe;

the first piston assembly is arranged at one end of the horizontal direction of the driving bin;

the second piston assembly and the first piston assembly are symmetrically arranged at the other end of the driving bin in the horizontal direction relative to the driving bin, and the structure of the second piston assembly is the same as that of the first piston assembly;

the two ends of the driving rod are fixedly connected with the movable ends of the first piston assembly and the second piston assembly respectively and meshed with the driving shaft, so as to control the driving shaft to rotate by virtue of the power of the first piston assembly and the second piston assembly;

and the control assembly is fixed on the outer wall of the driving bin, is communicated with the first piston assembly and the second piston assembly and is used for controlling the work of the first piston assembly and the second piston assembly.

Preferably, the first piston assembly comprises a rectangular piston cylinder, a rectangular piston and a piston rod; one end of the rectangular piston cylinder is fixedly connected with the driving bin, the rectangular piston cylinder is communicated with the output end of the control assembly, the rectangular piston slides in the rectangular piston cylinder, and the piston rod is vertically arranged at one end of the rectangular piston, which faces the driving rod, and is in clearance fit with the rectangular piston cylinder.

Preferably, the driving rod comprises a connecting rod and a bending part;

the connecting rods are symmetrically arranged on two sides of the driving rod and are respectively connected with one end of the first piston assembly and one end of the second piston assembly, which extend into the driving bin;

the bending part is arranged at the central position of the driving rod, two sides of the bending part are fixedly connected with a pair of connecting rods respectively, and one end of the bending part facing the driving shaft direction is meshed with the driving shaft for transmission so as to control the driving shaft to rotate.

Preferably, the control assembly comprises a triplet, an electromagnetic valve and a limit switch.

3. Advantageous effects

Compared with the prior art, the utility model cuts off the internal path of the valve body through the expansion of the pair of hemispherical valve cores under the elastic action of the elastic connecting part, has good sealing effect, and particularly, the diameter of the third abutting surface is larger than or equal to the diameter of the communicating pipes at the two sides of the valve body, thereby carrying out interference fit on the valve body, completely blocking the section of the communicating pipes and realizing the flow breaking effect. The sealing ring is additionally arranged on the third abutting surface, so that the sealing performance is further improved. The fourth abutting surface is matched with the second abutting surface of the valve body to improve the internal tightness and structural stability of the hemispherical valve core when the hemispherical valve core slides along the axis in the horizontal direction in the valve body. The sliding block can effectively prevent the movement direction of the pair of half ball valve cores from shifting;

meanwhile, the top end of the driving shaft is connected with the rotating handle, so that manual operation can be performed under the condition of no air source, different application scenes are met, specifically, the driving shaft is driven by manually twisting the rotating handle, and then the elastic connecting part is driven to drive the pair of half ball valve cores to rotate, so that the on-off of the valve body is controlled.

Drawings

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a front view of the present utility model;

FIG. 3 is a perspective view in full section of the valve of the present utility model in the closed position;

FIG. 4 is a perspective view in full section of the valve of the present utility model in an open state;

FIG. 5 is a cut-away perspective view of the valve body of the present utility model;

FIG. 6 is a perspective view of a hemispherical valve core of the present utility model;

FIG. 7 is a perspective view showing the internal structure of the valve body of the present utility model;

FIG. 8 is a perspective view of a first resilient connecting portion of the present utility model;

FIG. 9 is a perspective view of a drive shaft of the present utility model;

FIG. 10 is a top view of the present utility model;

fig. 11 is a partial perspective view of the present utility model.

The reference numerals in the figures are:

1 is a valve body; 1a is a first abutment surface; 1b is a second abutment surface; 1c is a flange connecting sheet; 1d is a sealing bottom cover;

2 is a hemispherical valve core; 2a is a third abutment surface; 2b is a fourth abutment surface; 2c is a slider; 2d is a groove;

3 is an elastic connecting part; 3a is a first elastic connection; 3a1 is a rotating seat; 3a2 is a fixed block; 3a3 is a guide post; 3a4 is a spring; 3a5 is a chute; 3b is a second elastic connection; 3c is a prismatic butt joint rod;

4 is a driving shaft; 4a is a plug-in part; 4b is a tooth slot; 4c is an extension;

5 is a pneumatic mechanism; 5a is a flange connecting pipe; 5b is a drive bin; 5c is a first piston assembly; 5c1 is a rectangular piston cylinder; 5c2 is a rectangular piston; 5c3 is a piston rod; 5d is a second piston assembly; 5e is a driving rod; 5e1 is a connecting rod; 5e2 is a bending part; 5f is a control component;

and 6 is a rotary handle.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

Example 1:

the pneumatic valve as shown in fig. 1 to 3 comprises a valve body 1, a hemispherical valve core 2, an elastic connecting part 3, a driving shaft 4, a pneumatic mechanism 5 and a rotary handle 6;

the valve body 1 consists of a throat pipe with a waist-round central cross section and a communicating pipe connected with a controlled pipeline;

the hemispherical valve cores 2 are provided with a pair of hemispherical valve cores, are oppositely arranged and are elastically connected with two sides of the elastic connecting part 3, the diameter of the hemispherical valve cores is larger than that of communicating pipes at two sides of the valve body 1, the outer walls of the hemispherical valve cores are in interference fit with the communicating pipes at two sides of the valve body 1 in a valve closing state, and the hemispherical valve cores 2 are mutually attached to form a spherical structure with a through hole in the middle in a valve opening state;

the elastic connecting parts 3 are arranged at the upper end and the lower end of the valve body 1, are rotationally connected with the valve body 1, and are respectively and elastically connected with a pair of hemispherical valve cores 2 along the direction which is perpendicular to the direction away from the axis, so that the two hemispherical valve cores 2 are mutually separated to realize the normally closed state of the valve;

the driving shaft 4 is rotationally connected with the fixed end of the pneumatic mechanism 5, is in plug-in fit with the top end of the elastic connecting part 3 and is fixedly connected in the circumferential direction, and is used for driving the elastic connecting part 3 to rotate;

the pneumatic mechanism 5 is arranged at the top of the valve body 1, and the output end of the pneumatic mechanism is meshed with the driving shaft 4 and is used for controlling the driving shaft 4 to perform circumferential rotation;

a rotary handle 6 is arranged at the top end of the driving shaft 4 extending out of the pneumatic mechanism 5 and is used for manually controlling the valve.

The pneumatic mechanism 5 is electrically connected with the controller. The pneumatic mechanism 5 is connected to a gas source. The valve is normally closed, under the condition that the pair of hemispherical valve cores 2 are mutually separated along the flowing direction in the valve body 1 under the action of the elastic connecting part 3, the outer walls of the hemispherical valve cores 2 are abutted on the connecting parts of communicating pipes at the two sides of the valve body 1 and the central position, and the diameter of the communicating pipes is smaller than that of the hemispherical valve cores 2, so that the pair of hemispherical valve cores 2 are blocked to realize normally closed. When the valve is required to be switched to an open state, the controller sends a signal to the pneumatic mechanism 5, and the pneumatic mechanism 5 receives the signal and then controls the driving shaft 4 to rotate. When the driving shaft 4 rotates, the elastic connecting part 3 is driven to rotate, and then the pair of hemispherical valve cores 2 are driven to rotate around the axis of the elastic connecting part 3, the outer walls of the hemispherical valve cores 2 are abutted against the two sides of the inner wall of the central part of the valve body 1 so as to approach the elastic connecting part 3, until the inner side parts of the pair of hemispherical valve cores 2 are abutted against each other to form a structure similar to a sphere, and through an opening between the two, air flow or water flow can pass through the valve body 1. When the working environment can not provide an air source, a worker can rotate the driving shaft 4 by manually rotating the rotary handle 6, the driving function of the pneumatic mechanism 5 is replaced, and the on-off control effect of the structure can be realized.

As shown in fig. 5, the valve body 1 is provided with a first abutment surface 1a, a second abutment surface 1b, a flange connecting piece 1c, and a sealing bottom cover 1d;

the first abutting surfaces 1a are symmetrically arranged on two sides of the central position of the valve body 1 and are used for abutting the outer sides of the hemispherical valve cores 2 so as to achieve mutual approaching of the hemispherical valve cores 2;

the second abutting surface 1b is arranged at the top end and the bottom end in the valve body 1, is attached to the upper end and the lower end of the hemispherical valve core 2 and is used for matching with the horizontal sliding of the hemispherical valve core 2;

flange connection pieces 1c installed at the ends of the communication pipes on both sides of the valve body 1 for connecting the valve body 1 to the controlled pipeline;

a sealing bottom cover 1d installed at the bottom of the central position of the valve body 1 and covering the lower part of the bottom of the elastic connection part 3 for ensuring the tightness of the inside of the valve body 1.

The elastic connecting part 3 at the bottom of the valve body 1 can be conveniently detached for replacement and maintenance by arranging the sealing bottom cover 1 d. When the elastic connection portion 3 drives the pair of hemispherical valve elements 2 to rotate, the outer wall of the hemispherical valve element 2 abuts against the first abutment surface 1a, so that an urging force toward the axial direction of the elastic connection portion 3 is generated, and the pair of hemispherical valve elements 2 are driven to approach each other. The arrangement of the second contact surface 1b matches the movement of the hemispherical valve element 2 in the valve body 1, thereby improving the internal sealing property.

As shown in fig. 6, the hemispherical valve element 2 is provided with a third abutment surface 2a, a fourth abutment surface 2b, a slider 2c, and a groove 2d;

the third abutting surface 2a is arranged on the outer walls of the pair of hemispherical valve cores 2, is of a circular plane structure and is used for plugging communicating pipes on two sides of the valve body 1 in a closed state;

a fourth contact surface 2b formed on the top and bottom of the third contact surface 2a for sliding in contact with the top and bottom ends of the valve body 1;

the sliding blocks 2c are symmetrically arranged at the top end and the bottom end of the hemispherical valve core 2, are in sliding connection with the elastic connecting parts 3 and are used for limiting and guiding the movement of the hemispherical valve core 2;

grooves 2d are formed in the top and bottom ends of the hemispherical valve core 2 for inserting the two sides of the elastic connecting portion 3.

The diameter of the third abutting surface 2a is larger than or equal to the diameter of the communicating pipe at the two sides of the valve body 1, so that interference fit is carried out on the third abutting surface, the section of the communicating pipe can be completely blocked, and the flow breaking effect is realized. The third contact surface 2a can be further improved in sealing performance by additionally providing a sealing ring. The fourth contact surface 2b improves the internal tightness and structural stability of the hemispherical valve element 2 when the hemispherical valve element 1 slides along the horizontal axis inside the valve body 1 by being matched with the second contact surface 1b of the valve body 1. The slider 2c can effectively prevent the movement direction of the pair of hemispherical spools 2 from being shifted.

As shown in fig. 7, the elastic connection portion 3 includes a first elastic connection portion 3a, a second elastic connection portion 3b, and a prismatic docking rod 3c;

the first elastic connecting part 3a is rotationally connected with the top end of the valve body 1, two ends of the first elastic connecting part are respectively and elastically connected with the pair of hemispherical valve cores 2, and the first elastic connecting part is arranged at the middle gap of the pair of hemispherical valve cores 2 and is used for providing elastic force expanding towards two ends for the pair of hemispherical valve cores 2;

the second elastic connecting part 3b is rotationally connected with the bottom end of the valve body 1, is symmetrically arranged with the first elastic connecting part 3a about the hemispherical valve core 2, has the same structure as the first elastic connecting part 3a, and has the same axis as the axis of the first elastic connecting part 3a, and is used for providing elastic force expanding towards two ends for the hemispherical valve core 2 by matching with the first elastic connecting part 3 a;

the prismatic docking rod 3c is mounted at the top end of the first elastic connecting portion 3a, is in plug-in fit with the bottom of the driving shaft 4, and is used for connecting the first elastic connecting portion 3a and the driving shaft 4 together and fixing the first elastic connecting portion and the driving shaft 4 with each other in the circumferential direction.

The prismatic docking rod 3c is a quadrangular prism, and is matched with a quadrangular groove at the bottom of the driving shaft 4 to realize synchronous movement. The driving shaft 4 drives the first elastic connecting part 3a to rotate, and then drives the pair of hemispherical valve cores 2 to rotate, and the hemispherical valve cores 2 drive the second elastic connecting part 3b to rotate. Through the grafting cooperation of prismatic docking rod 3c and drive shaft 4, the staff can conveniently separate the outside structure of valve body 1 with valve body 1, can convenient maintenance and change spare part.

As shown in fig. 8, the first elastic connection portion 3a includes a rotating seat 3a1, a fixed block 3a2, a guide post 3a3, a spring 3a4 and a chute 3a5;

the rotating seat 3a1 is rotationally connected with the top end of the valve body 1, and the top end is fixedly connected with the prismatic docking rod 3c and coaxially arranged;

the fixed block 3a2 is arranged at the central position of the bottom of the rotating seat 3a1, and the end surfaces of the two sides face to the pair of hemispherical valve cores 2 respectively;

the guide posts 3a3 are vertically arranged on the end surfaces of the two sides of the guide posts 3a 3;

the spring 3a4 is sleeved on the guide post 3a3, one end of the spring is abutted against the end face of the fixed block 3a2, and the other end of the spring is abutted against the top of the hemispherical valve core 2, so as to provide elastic force for outwards expanding and separating the hemispherical valve core 2;

the sliding groove 3a5 is arranged at the bottom end of the rotating seat 3a1 along the movement direction of the hemispherical valve core 2, is in sliding connection with the top ends of the hemispherical valve cores 2, and is used for guiding and limiting the movement of the hemispherical valve cores 2.

The guide posts 3a3 and the springs 3a4 are arranged in the grooves 2d of the hemispherical valve cores 2, so that the mutual butt joint of the hemispherical valve cores 2 can be avoided. The driving shaft 4 drives the whole first elastic connecting portion 3a to rotate by driving the rotating seat 3a1 to rotate. The both side ends of the fixed block 3a2 provide an abutting effect against the springs 3a 4. The springs 3a4 drive the pair of hemispherical spools 2 to separate from each other with the fixed block 3a2 as a support. The guide post 3a3 further improves the structural stability of the spring 3a4 when expanding and contracting, and the sliding connection of the spring 3a4 and the sliding block 2c of the hemispherical valve core 2 is combined to prevent the spring 3a4 from deflecting in the expanding and contracting process, so that the structural stability is further improved.

As shown in fig. 9, the drive shaft 4 includes a socket portion 4a, a tooth groove 4b, and an extension portion 4c; the inserting part 4a, the tooth groove 4b and the extension part 4c are coaxially and sequentially arranged from top to bottom, a slot which is inserted into the top end of the elastic connecting part 3 is arranged at the bottom of the inserting part 4a, the tooth groove 4b is meshed with the output end of the pneumatic mechanism 5, the inserting part 4a is rotationally connected with the bottom end of the pneumatic mechanism 5, and the extension part 4c is rotationally connected with the top end of the pneumatic mechanism 5 and extends out of the pneumatic mechanism 5 to be fixedly connected with the rotary handle 6.

The output end of the pneumatic mechanism 5 controls the driving shaft 4 to rotate around the axis of the driving shaft through the tooth grooves 4b, and then drives the elastic connecting part 3 to rotate. The bottom slot section of the plugging part 4a is quadrilateral and is used for driving the elastic connecting part 3 to coaxially rotate. The extension part 4c can replace the pneumatic mechanism 5 to carry out manual control through the connection with the rotary handle 6 so as to cope with the working environment without an external air source.

As shown in fig. 4 and 10, the pneumatic mechanism 5 includes a flange connection pipe 5a, a driving chamber 5b, a first piston assembly 5c, a second piston assembly 5d, a driving rod 5e and a control assembly 5f;

the bottom end of the flange connecting pipe 5a is connected with the top end of the valve body 1, is rotationally connected with the driving shaft 4 and is used for installing the pneumatic mechanism 5 on the top of the valve body 1;

the driving bin 5b is arranged at the top end of the flange connecting pipe 5 a;

a first piston assembly 5c installed at one end of the driving bin 5b in the horizontal direction;

the second piston assembly 5d and the first piston assembly 5c are symmetrically arranged at the other end of the driving bin 5b in the horizontal direction with respect to the driving bin 5b, and the structure is the same as that of the first piston assembly 5 c;

the two ends of the driving rod 5e are fixedly connected with the movable ends of the first piston assembly 5c and the second piston assembly 5d respectively and meshed with the driving shaft 4 so as to control the driving shaft 4 to rotate by virtue of the power of the first piston assembly 5c and the second piston assembly 5 d;

and the control assembly 5f is fixed on the outer wall of the driving bin 5b, is communicated with the first piston assembly 5c and the second piston assembly 5d and is used for controlling the operation of the first piston assembly 5c and the second piston assembly 5 d.

The control assembly 5f is electrically connected to the controller. The control assembly 5f is connected to a gas source. The control component 5f cooperates with an air source to control the first piston component 5c and the second piston component 5d to drive the driving rod 5e to synchronously and horizontally move, and then drive the driving shaft 4 engaged with the driving rod to rotate.

As shown in fig. 4, the first piston assembly 5c includes a rectangular piston cylinder 5c1, a rectangular piston 5c2, and a piston rod 5c3; one end of a rectangular piston cylinder 5c1 is fixedly connected with the driving bin 5b, the rectangular piston cylinder 5c1 is communicated with the output end of the control assembly 5f, the rectangular piston 5c2 slides in the rectangular piston cylinder 5c1, and a piston rod 5c3 is vertically arranged at one end of the rectangular piston 5c2, which faces the driving rod 5e, and is in clearance fit with the rectangular piston cylinder 5c 1.

The control assembly 5f synchronously controls the pair of rectangular pistons 5c2 to slide in the rectangular piston cylinder 5c1, and then drives the piston rod 5c3 to move, so as to drive the driving rod 5e to perform linear displacement. The rectangular structures of the rectangular piston cylinder 5c1 and the rectangular piston 5c2 can effectively prevent the driving rod 5e from deflecting, and the stability of the structure is improved.

Example 2:

compared with embodiment 1, as shown in fig. 11, the driving rod 5e includes a connecting rod 5e1 and a bending portion 5e2;

the connecting rods 5e1 are symmetrically arranged at two sides of the driving rod 5e and are respectively connected with one ends of the first piston assembly 5c and the second piston assembly 5d extending into the driving bin 5 b;

the bending part 5e2 is arranged at the central position of the driving rod 5e, two sides of the bending part are fixedly connected with a pair of connecting rods 5e1 respectively, and one end facing the direction of the driving shaft 4 is meshed with the driving shaft 4 for transmission so as to control the driving shaft 4 to rotate.

The first piston assembly 5c and the second piston assembly 5d drive the connecting rod 5e1 to synchronously move, and then the driving shaft 4 is driven to rotate through the bending part 5e2 fixedly connected with the connecting rod 5e 1.

The control assembly 5f comprises a triple piece, an electromagnetic valve and a limit switch.

The triple component, the electromagnetic valve and the limit switch are common control elements in the pneumatic valve structure and are used for controlling the synchronous movement of the first piston assembly 5c and the second piston assembly 5d, and the specific structural principle is not repeated herein, so that the control accuracy can be ensured.

In the pneumatic valve, the valve is normally closed, under the action of the elastic connecting part 3, the pair of hemispherical valve cores 2 are mutually separated along the flowing direction in the valve body 1, the outer walls of the hemispherical valve cores 2 are abutted against the connecting parts of communicating pipes at the two sides of the valve body 1 and the central position, and the diameter of the communicating pipes is smaller than that of the hemispherical valve cores 2, so that the pair of hemispherical valve cores 2 are blocked to realize normally closed.

When the valve is required to be switched to an open state, the controller sends a signal to the pneumatic mechanism 5, and the pneumatic mechanism 5 receives the signal and then controls the driving shaft 4 to rotate.

When the driving shaft 4 rotates, the elastic connecting part 3 is driven to rotate, and then the pair of hemispherical valve cores 2 are driven to rotate around the axis of the elastic connecting part 3, the outer walls of the hemispherical valve cores 2 are abutted against the two sides of the inner wall of the central part of the valve body 1 so as to approach the elastic connecting part 3, until the inner side parts of the pair of hemispherical valve cores 2 are abutted against each other to form a structure similar to a sphere, and through an opening between the two, air flow or water flow can pass through the valve body 1.

When the working environment can not provide an air source, a worker can rotate the driving shaft 4 by manually rotating the rotary handle 6, the driving function of the pneumatic mechanism 5 is replaced, and the on-off control effect of the structure can be realized.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. The novel pneumatic valve is characterized by comprising a valve body (1), a hemispherical valve core (2), an elastic connecting part (3), a driving shaft (4), a pneumatic mechanism (5) and a rotary handle (6);

the valve body (1) consists of a throat pipe with a waist-round central cross section and a communicating pipe connected with the controlled pipeline;

the hemispherical valve cores (2) are provided with a pair, are oppositely arranged and are elastically connected with the two sides of the elastic connecting part (3), the diameter of the hemispherical valve cores is larger than that of communicating pipes on the two sides of the valve body (1), the outer walls of the hemispherical valve cores are in interference fit with the communicating pipes on the two sides of the valve body (1) in a valve closing state, and the hemispherical valve cores (2) are mutually attached to form a spherical structure with a through hole in the middle in a valve opening state;

the elastic connecting parts (3) are arranged at the upper end and the lower end of the valve body (1) and are rotationally connected with the valve body (1), and two sides of the elastic connecting parts are respectively and elastically connected with a pair of hemispherical valve cores (2) along the direction which is perpendicular to the axis and is far away from the axis, so that the two hemispherical valve cores (2) are separated from each other to realize normally closed valve;

the driving shaft (4) is rotationally connected with the fixed end of the pneumatic mechanism (5), is in plug-in fit with the top end of the elastic connecting part (3) and is fixedly connected in the circumferential direction, and is used for driving the elastic connecting part (3) to rotate;

the pneumatic mechanism (5) is arranged at the top of the valve body (1), and the output end of the pneumatic mechanism is meshed with the driving shaft (4) and is used for controlling the driving shaft (4) to do circumferential rotation;

the rotary handle (6) is arranged at the top end of the driving shaft (4) extending out of the pneumatic mechanism (5) and is used for manually controlling the valve;

the hemispherical valve core (2) is provided with a third abutting surface (2 a), a fourth abutting surface (2 b), a sliding block (2 c) and a groove (2 d);

the third abutting surface (2 a) is arranged on the outer walls of the pair of hemispherical valve cores (2) which deviate from each other and is of a circular plane structure and is used for plugging communicating pipes on two sides of the valve body (1) in a closed state;

the fourth abutting surface (2 b) is arranged at the top and the bottom of the third abutting surface (2 a) and is used for being attached to the top end and the bottom end of the valve body (1) in a sliding manner;

the sliding blocks (2 c) are symmetrically arranged at the top end and the bottom end of the hemispherical valve core (2) and are in sliding connection with the elastic connecting parts (3) so as to limit and guide the movement of the hemispherical valve core (2);

grooves (2 d) which are arranged at the top end and the bottom end of the hemispherical valve core (2) and are used for inserting two sides of the elastic connecting part (3);

the valve body (1) is provided with a first abutting surface (1 a), a second abutting surface (1 b), a flange connecting sheet (1 c) and a sealing bottom cover (1 d);

the first abutting surfaces (1 a) are symmetrically arranged on two sides of the central position of the valve body (1) and are used for abutting the outer sides of the hemispherical valve cores (2) so as to achieve mutual approaching of the hemispherical valve cores (2);

the second abutting surface (1 b) is arranged at the top end and the bottom end in the valve body (1), is attached to the upper end and the lower end of the hemispherical valve core (2) and is used for matching with the horizontal sliding of the hemispherical valve core (2);

flange connecting pieces (1 c) which are arranged at the end parts of communicating pipes at the two sides of the valve body (1) and are used for connecting the valve body (1) to a controlled pipeline;

a sealing bottom cover (1 d) which is arranged at the bottom of the central position of the valve body (1) and covers the lower part of the bottom of the elastic connecting part (3) so as to ensure the tightness of the interior of the valve body (1);

the elastic connecting part (3) comprises a first elastic connecting part (3 a), a second elastic connecting part (3 b) and a prismatic butt joint rod (3 c);

the first elastic connecting part (3 a) is rotationally connected with the top end of the valve body (1), and two ends of the first elastic connecting part are respectively and elastically connected with the pair of hemispherical valve cores (2) and are arranged at the middle gap of the pair of hemispherical valve cores (2) so as to provide elastic force expanding towards two ends for the pair of hemispherical valve cores (2);

the second elastic connecting part (3 b) is rotationally connected with the bottom end of the valve body (1), is symmetrically arranged with the first elastic connecting part (3 a) about the hemispherical valve core (2), has the same structure as the first elastic connecting part (3 a), and has the same axis as the first elastic connecting part (3 a) and is collinear with the axis of the first elastic connecting part (3 a) so as to provide elastic force expanding towards two ends for the hemispherical valve core (2) in cooperation with the first elastic connecting part (3 a);

the prismatic butt joint rod (3 c) is arranged at the top end of the first elastic connecting part (3 a) and is in plug-in fit with the bottom of the driving shaft (4) so as to connect the first elastic connecting part (3 a) with the driving shaft (4) and fix the first elastic connecting part and the driving shaft (4) with each other in the circumferential direction;

the first elastic connecting part (3 a) comprises a rotating seat (3 a 1), a fixed block (3 a 2), a guide pillar (3 a 3), a spring (3 a 4) and a chute (3 a 5);

the rotating seat (3 a 1) is rotationally connected with the top end of the valve body (1), and the top end is fixedly connected with the prismatic docking rod (3 c) and coaxially arranged;

the fixed block (3 a 2) is arranged at the central position of the bottom of the rotating seat (3 a 1), and the end surfaces of two sides face to the pair of hemispherical valve cores (2) respectively;

the guide posts (3 a 3) are vertically arranged on the end surfaces of the two sides of the fixed block (3 a 2);

the spring (3 a 4) is sleeved on the guide post (3 a 3), one end of the spring is abutted with the end face of the fixed block (3 a 2), and the other end of the spring is abutted with the top of the hemispherical valve core (2) and is used for providing an outward expansion and separation elastic force for the hemispherical valve core (2);

the sliding groove (3 a 5) is arranged at the bottom end of the rotating seat (3 a 1) along the movement direction of the hemispherical valve core (2), is in sliding connection with the top ends of the hemispherical valve cores (2) and is used for guiding and limiting the movement of the hemispherical valve cores (2).

2. A new pneumatic valve as claimed in claim 1, characterized in that the drive shaft (4) comprises a socket (4 a), a tooth socket (4 b) and an extension (4 c); the socket part (4 a), the tooth socket (4 b) and the extension part (4 c) are coaxially and sequentially arranged from top to bottom, a slot which is spliced with the top end of the elastic connecting part (3) is arranged at the bottom of the socket part (4 a), the tooth socket (4 b) is meshed with the output end of the pneumatic mechanism (5), the socket part (4 a) is rotationally connected with the bottom end of the pneumatic mechanism (5), and the extension part (4 c) is rotationally connected with the top end of the pneumatic mechanism (5) and extends to the outside of the pneumatic mechanism (5) to be fixedly connected with the rotary handle (6).

3. A novel pneumatic valve as claimed in claim 1, wherein the pneumatic mechanism (5) comprises a flange connection pipe (5 a), a driving chamber (5 b), a first piston assembly (5 c), a second piston assembly (5 d), a driving rod (5 e) and a control assembly (5 f);

the bottom end of the flange connecting pipe (5 a) is connected with the top end of the valve body (1), is rotationally connected with the driving shaft (4) and is used for installing the pneumatic mechanism (5) on the top of the valve body (1);

the driving bin (5 b) is arranged at the top end of the flange connecting pipe (5 a);

the first piston assembly (5 c) is arranged at one end of the driving bin (5 b) in the horizontal direction;

the second piston assembly (5 d) and the first piston assembly (5 c) are symmetrically arranged at the other end of the driving bin (5 b) in the horizontal direction relative to the driving bin (5 b), and the structure of the second piston assembly is the same as that of the first piston assembly (5 c);

the two ends of the driving rod (5 e) are fixedly connected with the movable ends of the first piston assembly (5 c) and the second piston assembly (5 d) respectively, are meshed with the driving shaft (4) and are used for controlling the driving shaft (4) to rotate by virtue of the power of the first piston assembly (5 c) and the second piston assembly (5 d);

the control assembly (5 f) is fixed on the outer wall of the driving bin (5 b), is communicated with the first piston assembly (5 c) and the second piston assembly (5 d) and is used for controlling the work of the first piston assembly (5 c) and the second piston assembly (5 d).

4. A novel pneumatic valve as claimed in claim 3, wherein the first piston assembly (5 c) comprises a rectangular piston cylinder (5 c 1), a rectangular piston (5 c 2) and a piston rod (5 c 3); one end of a rectangular piston cylinder (5 c 1) is fixedly connected with the driving bin (5 b), the rectangular piston cylinder (5 c 1) is communicated with the output end of the control assembly (5 f), the rectangular piston (5 c 2) slides in the rectangular piston cylinder (5 c 1), and a piston rod (5 c 3) is vertically arranged at one end, facing the driving rod (5 e), of the rectangular piston (5 c 2) and is in clearance fit with the rectangular piston cylinder (5 c 1).

5. A novel pneumatic valve as claimed in claim 3, wherein the drive rod (5 e) comprises a connecting rod (5 e 1) and a bending part (5 e 2);

the connecting rods (5 e 1) are symmetrically arranged at two sides of the driving rod (5 e) and are respectively connected with one end of the first piston assembly (5 c) and one end of the second piston assembly (5 d) extending into the driving bin (5 b);

the bending part (5 e 2) is arranged at the central position of the driving rod (5 e), two sides of the bending part are fixedly connected with a pair of connecting rods (5 e 1) respectively, and one end of the bending part, which faces to the direction of the driving shaft (4), is meshed with the driving shaft (4) for transmission, so as to control the driving shaft (4) to rotate.

6. A new pneumatic valve as claimed in claim 3, characterized in that the control assembly (5 f) comprises a triplet, a solenoid valve and a limit switch.