CN201265693Y - Airflow impulse valve - Google Patents

Abstract

The utility model provides a pulse valve with a light body and a double-action cylinder to assist spring recovery, which includes a valve seat and a cylinder body. The valve seat is divided into left and right valve seats, which are respectively installed on the left and right sides of the cylinder body. There is a blocking device inside the right valve seat, and the hollow piston cylinder is installed in the valve seat and passes through the inlet and outlet of the valve seat, becoming the only passage for entering and exiting. Correspondingly, it can be closed by a blocking device. The piston in the cylinder body is connected and fixed with the piston barrel. The left and right air chambers of the cylinder body are respectively connected with the air ports A and B. A solenoid valve controls the gas on and off, so that the piston drives the piston barrel left and right. Move and quickly open and close the valve. The utility model has the following advantages and effects: 1. The hollow design of the piston barrel reduces the weight of the entire valve body, making the valve body light; 2. The two-way action cylinder helps the spring to return, and the driving pressure is low, so that the valve opens and closes quickly and the flow rate is high. High, prolonging the service life.

Description

A kind of air pulse valve

technical field

The utility model relates to a pulse valve, in particular to a pulse valve used for controlling high flow rate and fast opening and closing.

Background technique

Most of the connection between the existing pneumatic valve cylinder block and the upper and lower covers of the cylinder, as well as the connection between the lower cover of the cylinder and the valve cover, adopts screw fastening flanges, which makes the structure complex, easy to loosen, and increase in volume. These valves generally include two valve seats, at least one cylinder, and a movable valve part. Generally, a valve part is movable and supported in the hairpin, and directly acts back and forth against the operating force of the actuator acting on the valve part to achieve opening and closing. and off purpose. The operating force is generally provided by the potential energy of compressed gas or spring compression. The actuator is generally an electromagnetic control device, which can move the valve member to a certain position in the valve cylinder with the help of compressed gas after it is energized. A return spring is often used to bias the valve member back to the de-energized position. These valves are used in a wide variety of manufacturing applications where high flow rates and fast response times are required.

The production technology of this type of valve has been greatly developed, but the physical size and resistance, the rapid operation and the life of the work in a very fast cycle time are all problems that designers have to solve. Generally, it is a single-acting cylinder, which uses compressed air when it is opened, and relies on the return action of the spring when it is closed. In fact, the friction force and surface adhesion of the sealing rings between the valve parts hinder the return action of the spring and hinder the return action of the spring. This phenomenon seriously hinders some equipment that needs to open and close the door quickly, such as the normal operation of the pulse air flow mixer. The pulse time is 3 to 5 seconds, so the requirements for the valve are also strict.

Contents of the invention

On the basis of overcoming the problems existing in the prior art, the utility model provides a pulse valve with a light body and a double-action cylinder to assist spring recovery. The valve opens and closes quickly and greatly prolongs the service life of the pulse valve.

In order to solve the problems of the technologies described above, the utility model adopts the following technical solutions:

An air flow pulse valve, including a valve seat and a cylinder block, is characterized in that: the valve seat is divided into left and right valve seats, which are respectively installed on the left and right sides of the cylinder body, and the right valve seat is provided with a blocking device, hollow The piston cylinder is installed in the valve seat and passes through the inlet and outlet of the valve seat, becoming the only passage for entering and exiting. The left end of the piston cylinder is pressed tightly by the compression spring, and the right end of the piston cylinder corresponds to the sealing device and can be closed by the sealing device. The piston in the body is fixedly connected to the piston barrel, the left and right air chambers of the cylinder body are connected to the air ports A and B respectively, and a solenoid valve controls the gas on and off, so that the piston drives the piston barrel to move left and right, and quickly opens and closes the valve.

In order to solve the problems of the technologies described above, the utility model adopts the following further technical solutions:

The air cavity of the cylinder body is surrounded by the outer circumference of the piston cylinder, the outer wall of the cylinder and the left and right valve seats, and the inner walls of the left and right valve seats are formed with retaining rings that closely match the outer circumference of the piston cylinder.

The right valve seat is connected with a valve seat assembly through a rib, and there is a channel communicating with the outlet between the right valve seat and the valve seat assembly, and the blocking device is arranged on the valve seat assembly.

The blocking device is a sealing gland.

The inner wall of the left valve seat is provided with a shoulder, the right end of the piston cylinder is provided with a connecting piece, the left end of the compression spring is fixed with the shoulder, and the right end is fixed with the connecting piece.

The piston is O-shaped, and is set outside the piston cylinder. The piston cylinder is provided with left and right stoppers, and the piston is installed between the left and right stoppers.

Compared with the prior art, the utility model has the following advantages and effects: 1. The hollow design of the piston barrel reduces the weight of the entire valve body, making the valve body lighter; 2. The two-way action cylinder helps the spring to return, and the driving pressure is low, making the valve Quick opening and closing, high flow rate, and greatly extended service life.

Description of drawings

Fig. 1 is a structural sectional view of the utility model.

Detailed ways

Referring to Fig. 1, an airflow pulse valve includes a valve seat and a cylinder block 1. The cylinder body 1 can be designed according to the airflow range of the main pipeline, i.e. the diameter of the cylinder, and the valve seats are divided into left and right valve seats 2 and 3, respectively. Bolts are installed on the left and right sides of the cylinder block 1, the inlet and outlet of the left and right valve seats 2 and 3 are connected with the pipeline flange, and the hollow piston cylinder 4 is installed in the valve seat and passes through the inlet and outlet of the valve seat, becoming the only In and out channels, the right valve seat 3 is connected with the valve seat assembly 6 through the rib 5, there is a passage between the right valve seat 3 and the valve seat assembly 6 to communicate with the outlet, and the valve seat assembly 6 is provided with a sealing pressure seal as a blocking device. Cover 7, sealing gland 7 and valve seat assembly 6 are tightly connected by a sealing ring, the left end of the piston barrel 4 is pressed tightly by a compression spring 8, the inner wall of the left valve seat 2 is provided with a shoulder 9, and the right end of the piston barrel 4 is provided with a connecting piece 10. The left end of the compression spring 8 is fixed to the shoulder 9, the right end of the compression spring 8 is fixed to the connector 10, and the right end of the piston barrel 4 corresponds to the sealing gland 7 and can be closed by the sealing gland 7. The piston 11 in the cylinder body Connected and fixed with the piston cylinder 4, the piston 11 is O-shaped, and is set outside the piston cylinder 4. The piston cylinder 4 is provided with left and right stoppers 14, and the piston 11 is installed between the left and right stoppers 14, and is fixed by the left and right stoppers 14. The air cavity of the body is surrounded by the outer circumference of the piston barrel, the outer wall 12 of the cylinder, and the left and right valve seats 2 and 3. The inner walls of the left and right valve seats are formed with a retaining ring 13 that closely matches the outer periphery of the piston barrel. The function of the retaining ring 13 is to make the gas It can only pass through the piston barrel 4, and a sealing ring is installed on the piston 11, so that the left and right air cavities are formed in the cylinder, and the left and right air cavities are connected with the air ports A and B respectively. On and off, the piston 11 drives the piston barrel 4 to move left and right, and the valve is quickly opened and closed.

The control gas passes through the air pipe of the solenoid valve (not marked) and enters the B air port. Under the action of the compressed gas, the piston 11 moves to the left together with the piston cylinder 4 and the piston 11. The spring 8 is compressed, the valve opens, and the pipeline gas flows from the left The valve seat 2 enters, passes through the hollow piston cylinder 4 and the right valve seat 3, and enters the pipeline or equipment. When the other air pipe of the solenoid valve is ventilated, the previous air pipe automatically does not supply air, and the control gas enters the A air port. The restoring force of the spring 8 Push the piston 11 and the piston cylinder 4 to the right together with the pressure of the control gas entering from A, the sealing gland 7 seals the piston cylinder 4, the valve is closed, and there is no leakage.

Claims (6)

1, a kind of air-flow sentinel valve, comprise valve seat and cylinder block (1), it is characterized in that: valve seat is divided into a left side, right valve seat (2,3), be installed in the left side of cylinder block (1) respectively, right both sides, be provided with blocking device in the right valve seat (3), box type piston tube (4) is installed in the valve seat and connects the import and export of valve seat, become unique access way, the left end of piston cylinder (4) is pressed by pressure spring (8), the right-hand member of piston cylinder (4) is just in time corresponding with blocking device, and can seal by blocking device, piston (11) in the cylinder block is connected and fixed the left side of cylinder block with piston cylinder (4), right air cavity respectively with ventilating hole A, B is communicated with, an electromagnetic valve gas break-make, make piston (11) drive piston cylinder (4) move left and right, rapidly opening/shutting valve.

2, a kind of air-flow sentinel valve as claimed in claim 1, it is characterized in that: the air cavity of described cylinder block (1) is surrounded by piston cylinder periphery, cylinder block outer wall (12) and left and right valve seat (2,3), and described left and right sides valve seat (2,3) inwall forms and the close-fitting back-up ring of piston cylinder (4) periphery (13).

3, a kind of air-flow sentinel valve as claimed in claim 1 or 2, it is characterized in that: be connected with valve component (6) by rib (5) in the described right valve seat (3), leave between right valve seat (3) and valve component (6) and export the passage that is communicated with, described blocking device is located on the valve component (6).

4, a kind of air-flow sentinel valve as claimed in claim 3 is characterized in that: described blocking device is a sealing gland (7).

5, a kind of air-flow sentinel valve as claimed in claim 1 or 2, it is characterized in that: described left valve seat (2) inwall is provided with shoulder (9), the right-hand member of piston cylinder (4) is provided with link (10), the left end of pressure spring (8) and shoulder (9) are fixing, and the right-hand member of pressure spring (8) and link (10) are fixing.

6, a kind of air-flow sentinel valve as claimed in claim 1 or 2, it is characterized in that: described piston (11) is the O type, is enclosed within outside the piston cylinder (4), and piston cylinder (4) is provided with left and right sides block (14), and piston (11) is installed between the left and right sides block (14).