Pneumatic three-way valve

Abstract

The utility model relates to the technical field of pneumatic three-way valves, in particular to a pneumatic three-way valve which comprises a three-way valve body, an installation base is fixedly installed at the bottom of the three-way valve body, an air cylinder is fixedly installed at the top of the installation base, the output end of the air cylinder is fixedly connected with a push rod, and a first hinge rod is hinged to the top of the push rod. A first rotating rod is fixedly connected to the inner wall of the first hinge rod, and a first mounting frame is fixedly mounted on the outer wall of the middle section of the front face of the three-way valve body. The deflected third hinge rod drives a second rotating rod fixedly connected with the inner wall to rotate, the rotating second rotating rod drives a second valve plate fixedly connected with the outer wall to rotate, and the first valve plate and the second valve plate which are connected rotate in a linkage mode accordingly, so that the problems that the response speed of the valve is not high enough, and the valve is damaged are solved. The problems that the valve seat and the valve plate which are connected are arranged in a mutually rotating mode, and therefore the phenomena that abrasion is prone to occurring, the sealing performance is reduced, and leakage occurs are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic three -way valve technical field especially relates to a pneumatic three -way valve. BACKGROUND

[0002] Industrial automation development: in modern industrial production, such as chemical industry, petroleum, electric power, metallurgy and other fields, the degree of automation is higher and higher, needs to control and adjust accurately to various fluid medium (such as gas, liquid, steam etc.). Pneumatic three -way valve as an important control element, can according to the instruction of control system, quickly, accurately realizes the flow of fluid, converges or flow direction switching, satisfies the demand of different production technology, therefore has been widely used in industrial automation production line. Many industrial production processes involve complex fluid delivery and processing flow, in chemical production, possibly need to divide one raw material fluid into two roads through three -way valve, respectively transports to different reaction kettle;Or two kinds of fluids from different pipelines are combined into a road through three -way valve, carries out subsequent mixing, reaction etc. operation. Pneumatic three -way valve can flexibly realize these functions, provides the guarantee for the smooth progress of complex process flow.

[0003] Although pneumatic three -way valve technology has made great progress, but still there are some problems. The existing pneumatic three -way valve is used for a long time, and the valve seat and valve core are easy to wear, leading to the decline of sealing performance, appears leakage phenomenon, and the response speed of valve is not fast enough, cannot satisfy some high requirements of fast switching occasion, based on this, a kind of pneumatic three -way valve is provided to solve the above problems. UTILITY MODEL CONTENTS

[0004] In view of the defects of prior art, the utility model provides a kind of pneumatic three -way valve, solve the existing pneumatic three -way valve is used for a long time, and the valve seat and valve core are easy to wear, leading to the decline of sealing performance, appears leakage phenomenon, and the response speed of valve is not fast enough, cannot satisfy some high requirements of fast switching occasion problem.

[0005] In order to solve the above technical problems, the utility model provides technical scheme as follows: A pneumatic three -way valve, including three -way valve body, three -way valve body bottom fixed mounting has mounting seat, the mounting seat top fixed mounting has pneumatic cylinder, pneumatic cylinder output fixed connection has push rod, the push rod top articulates and has articulated rod no.

[0006] Further improvement lies in that the three-way valve body is provided with a sealing gasket on the inner wall of each connecting port.

[0007] Further improvement lies in that the rotating rod one is rotatably connected to the inner wall of the mounting frame one; the mounting seat is fixedly installed on the top of the connecting portion; the pneumatic cylinder drives the push rod fixedly connected to the output end to move; the articulated rod one articulated on the top of the push rod deflects, and the rotating rod one fixedly connected to the inner wall of the articulated rod one rotates.

[0008] Further improvement lies in that the rotating rod one is rotatably connected to the inner wall of the three-way valve body and the inner wall of the valve seat one; the mounting frame one is fixedly installed on the middle segment of the three-way valve body; the rotating rod one rotatably connected to the inner wall of the mounting frame one is fixedly installed on the inner wall of the three-way valve body.

[0009] Further improvement lies in that the articulated rod two is fixedly connected to the outer wall of the rotating rod one; the rotating rod one is rotatably connected to the valve plate one fixedly connected to the outer wall; the rotating rod one is rotatably connected to the articulated rod two fixedly connected to the outer wall; the connecting rod articulated to the articulated rod two deflects, and the articulated articulated rod three deflects.

[0010] Further improvement lies in that the rotating rod two is rotatably connected to the inner wall of the three-way valve body; the mounting frame two is fixedly installed on the front of the three-way valve body; the rotating rod two is rotatably connected to the inner wall of the mounting frame two; the articulated rod three deflects, and the rotating rod two fixedly connected to the inner wall rotates; the rotating rod two rotates, and the valve plate two fixedly connected to the outer wall rotates.

[0011] Further improvement lies in that the valve seat one, the valve plate one, the valve seat two and the valve plate two are uniformly provided with limiting holes; when the system is running, pressure difference may be caused on both sides of the valve plate one and the valve plate two due to flow of medium, pressure change and the like, the limiting holes can balance the pressure on both sides of the valve plate to a certain extent, prevent uneven force on the valve plate caused by too large pressure difference, thereby affecting normal opening and closing operation of the valve, and avoid additional pressure load on the valve plate and other components, thereby reducing the risk of component damage.

[0012] By the above technical scheme, the utility model provides a kind of pneumatic three-way valve, at least have the following beneficial effects:

[0013] 1, the utility model deflection's hinged rod three drives the rotation of inner wall fixed connection's rotating rod two, and the rotating rotating rod two drives the rotation of outer wall fixed connection's valve plate two, and the valve plate one and the valve plate two of connection are linked to rotate, to solve the response speed of valve not enough fast, cannot satisfy some problems of high requirement for fast switching occasion, and the valve seat and valve plate of connection are mutually rotatable, to avoid the phenomenon of easy wear, leading to sealing performance decline, leakage phenomenon appears.

[0014] 2, the utility model is provided with limiting holes in the valve seat one, the valve plate one, the valve plate two and the sealing gasket of connection, when the system is running, pressure difference may be caused on both sides of the valve plate one and the valve plate two due to flow of medium, pressure change and the like, the limiting holes can balance the pressure on both sides of the valve plate to a certain extent, prevent uneven force on the valve plate caused by too large pressure difference, thereby affecting normal opening and closing operation of the valve, and avoid additional pressure load on the valve plate and other components, thereby reducing the risk of component damage;The hole on the valve plate can be used as exhaust hole or liquid discharge hole, and the gas or liquid is discharged to ensure the normal operation of the system. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the present application, and form part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application.

[0016] In the drawings:

[0017] Figure 1 It is the overall structure schematic view of the utility model;

[0018] Figure 2 It is the back side structure schematic view of the utility model;

[0019] Figure 3 It is the local structure schematic view of the utility model;

[0020] Figure 4 It is the local enlarged structure schematic view of the utility model.

[0021] Figure: 1, three-way valve body; 2, cylinder; 3, push rod; 4, articulated rod one; 5, rotating rod one; 6, mounting frame one; 7, valve seat one; 8, valve plate one; 9, articulated rod two; 10, connecting rod; 11, articulated rod three; 12, rotating rod two; 13, mounting frame two; 14, valve seat two; 15, valve plate two; 16, gasket; 17, mounting seat. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] The existing pneumatic three-way valve is prone to wear of the valve seat and the valve core after long-term use, resulting in a decrease in sealing performance and leakage. Moreover, the response speed of the valve is not fast enough, which cannot meet the requirements of some high-speed switching occasions. The embodiment provides a pneumatic three-way valve, please refer to Figures 1-4 , the embodiment provides a pneumatic three-way valve, which comprises a three-way valve body 1, the bottom of the three-way valve body 1 is fixedly installed with a mounting seat 17, the top of the mounting seat 17 is fixedly installed with a cylinder 2, the output end of the cylinder 2 is fixedly connected with a push rod 3, the top of the push rod 3 is hingedly connected with an articulated rod one 4, the inner wall of the articulated rod one 4 is fixedly connected with a rotating rod one 5, the outer wall of the middle segment of the front surface of the three-way valve body 1 is fixedly installed with a mounting frame one 6, the inner side of the mounting frame one 6 is fixedly installed with a valve seat one 7, the outer wall of the rotating rod one 5 is fixedly connected with a valve plate one 8, the right side of the front surface of the three-way valve body 1 is fixedly installed with a mounting frame two 13, the inner wall of the mounting frame two 13 is rotatably connected with a rotating rod two 12, the outer wall of the rotating rod two 12 is fixedly connected with a valve plate two 15, the inner side of the mounting frame two 13 is fixedly installed with a valve seat two 14, the outer wall of the rotating rod two 12 is fixedly connected with an articulated rod three 11, the top of the articulated rod three 11 is hingedly connected with a connecting rod 10, the other end of the connecting rod 10 is hingedly connected with an articulated rod two 9; the inner wall of each connecting port of the three-way valve body 1 is provided with a gasket 16; the rotating rod one 5 is rotatably connected to the inner wall of the mounting frame one 6; the rotating rod one 5 is rotatably connected to the inner wall of the three-way valve body 1, and the rotating rod one 5 is rotatably connected to the inner wall of the valve seat one 7; the articulated rod two 9 is fixedly connected to the outer wall of the rotating rod one 5; the rotating rod two 12 is rotatably connected to the inner wall of the three-way valve body 1; the valve seat one 7, the valve plate one 8, the valve seat two 14 and the valve plate two 15 are uniformly provided with limiting holes.

[0024] Working principle: the bottom of the connected three-way valve body 1 is fixedly installed with a mounting seat 17, the top of the connected mounting seat 17 is fixedly installed with a cylinder 2, the running cylinder 2 drives the output end fixedly connected push rod 3 to move, the hinged rod one 4 hinged at the top of the push rod 3 deflects, drives the rotating rod one 5 fixedly connected to the inner wall of the hinged rod one 4 to rotate, the mounting frame one 6 fixedly installed in the middle of the three-way valve body 1 is rotationally connected to the inner wall of the mounting frame one 6, the valve seat one 7 fixedly installed on the inner side of the mounting frame one 6 is fixedly installed on the inner wall of the three-way valve body 1, the rotating connecting rod one 5 rotates and drives the outer wall fixedly connected valve plate one 8 to rotate, and the rotating connecting rod one 5 rotates and drives the outer wall fixedly connected hinged rod two 9 to rotate, the connecting rod 10 hinged to the hinged rod two 9 deflects, drives the hinged hinged rod three 11 to deflect, the mounting frame two 13 on the front of the three-way valve body 1 is rotationally connected with the rotating rod two 12 on the inner wall, the deflected hinged rod three 11 drives the inner wall fixedly connected rotating rod two 12 to rotate, the rotating rotating rod two 12 drives the outer wall fixedly connected valve plate two 15 to rotate, the connected valve plate one 8 and valve plate two 15 rotate in linkage, the valve seat one 7, valve plate one 8, valve plate two 15 and sealing gasket 16 are provided with limiting holes, when the system runs, the two sides of the valve plate may be caused by the flow of medium, pressure change and other pressure difference, the limiting hole can make the pressure on both sides of the valve plate balanced to a certain extent, prevent the valve plate from being unevenly stressed due to excessive pressure difference, thereby affecting the normal opening and closing operation of the valve, and avoid additional pressure load on the valve plate and other components, reduce the risk of component damage; at the same time, by changing the size, number and distribution of the hole, the flow of medium can be fine tuned, in some occasions where accurate flow control is required, the hole on the valve plate can play an auxiliary adjusting role, cooperate with the overall opening of the valve, realize more accurate flow control; there may be air or other non-condensable gases in the system, or liquid accumulation in some cases. The hole on the valve plate can be used as an exhaust hole or a liquid discharge hole to discharge these gases or liquids to ensure the normal operation of the system.

[0025] It should be noted that in this text, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0026] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pneumatic three-way valve comprising a three-way valve body (1), characterized in that: The bottom of the three-way valve body (1) is fixedly installed with a mounting seat (17), the top of the mounting seat (17) is fixedly installed with a cylinder (2), the output end of the cylinder (2) is fixedly connected with a push rod (3), the top of the push rod (3) is hingedly connected with a hinge rod one (4), the inner wall of the hinge rod one (4) is fixedly connected with a rotating rod one (5), the front middle segment outer wall of the three-way valve body (1) is fixedly installed with a mounting bracket one (6), the inner side of the mounting bracket one (6) is fixedly installed with a valve seat one (7), the outer wall of the rotating rod one (5) is fixedly connected with a valve plate one (8), the right side of the three-way valve body (1) is fixedly installed with a mounting bracket two (13), the inner wall of the mounting bracket two (13) is rotatably connected with a rotating rod two (12), the outer wall of the rotating rod two (12) is fixedly connected with a valve plate two (15), the inner side of the mounting bracket two (13) is fixedly installed with a valve seat two (14), the outer wall of the rotating rod two (12) is fixedly connected with a hinge rod three (11), the top of the hinge rod three (11) is hingedly connected with a connecting rod (10), the other end of the connecting rod (10) is hingedly connected with a hinge rod two (9).

2. A pneumatic three-way valve according to claim 1, characterized in that: The inner wall of each connecting port of the three-way valve body (1) is provided with a sealing gasket (16).

3. A pneumatic three-way valve according to claim 1, characterized in that: The rotating rod one (5) is rotatably connected to the inner wall of the mounting bracket one (6).

4. The pneumatic three-way valve according to claim 1, characterized in that: The rotating rod one (5) is rotatably connected to the inner wall of the three-way valve body (1), and the rotating rod one (5) is rotatably connected to the inner wall of the valve seat one (7).

5. A pneumatic three-way valve according to claim 2, characterized in that: The hinge rod two (9) is fixedly connected to the outer wall of the rotating rod one (5).

6. A pneumatic three-way valve according to claim 3, characterized in that: The rotating rod two (12) is rotatably connected to the inner wall of the three-way valve body (1).

7. The pneumatic three-way valve according to claim 1, characterized in that: The valve seat one (7), the valve plate one (8), the valve seat two (14) and the valve plate two (15) are uniformly provided with limiting holes.

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