CN210978561U

CN210978561U - Pneumatic valve with limiting function

Info

Publication number: CN210978561U
Application number: CN201921631016.7U
Authority: CN
Inventors: 李严进; 高永亮; 钟继明
Original assignee: Nanjing Cec Panda Lcd Material Technology Co ltd
Current assignee: Nanjing Cec Panda Lcd Material Technology Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-07-10
Anticipated expiration: 2029-09-27

Abstract

The utility model provides a take limit function's pneumatic valve, its structure includes pneumatic actuator, rotation axis, shaft coupling, butterfly valve, and wherein the pneumatic actuator is connected through the shaft coupling in the upper portion of butterfly valve, and pneumatic actuator's top is equipped with the rotation axis, and its characterized in that is equipped with 1L type spacing movable block at the top of rotation axis, and pneumatic actuator's upper surface is equipped with 1 spacing quiet piece of 90 degrees the utility model has the advantages of 1) can effectively ensure that the admission valve just can not open under the condition that the blow-off valve does not close, stops the occurence of failure of a large amount of gases to leak, 2) the transformation is simple, reduces the number of times of on-the-site maintenance and part change, greatly reduced manufacturing cost, improvement work efficiency.

Description

Pneumatic valve with limiting function

Technical Field

The utility model relates to a take limit function's pneumatic valve belongs to piping installation technical field.

Background

At present, a dryer, a pneumatic valve at the inlet of a drying tower and a pneumatic valve at the exhaust of the drying tower in a liquid crystal production workshop are mainly composed of a pneumatic actuator and a butterfly valve, the opening and closing actions of the pneumatic actuator and the butterfly valve are controlled by P L C, and the pneumatic valve is driven to open and close by reversing the air circuit through the power failure of an electromagnetic reversing valve.

Disclosure of Invention

The utility model aims to solve the problem that the pneumatic valve switch of current desiccator leads to gaseous leakage because of the unable response of trouble provides a take limit function's pneumatic valve, guarantees the effective control of pneumatic valve switching, reduces the occurence of failure probability, improves the production security.

The utility model discloses a take limit function's pneumatic valve, its structure includes pneumatic actuator 1, rotation axis 2, shaft coupling 5, butterfly valve 6, wherein the upper portion of butterfly valve 6 is connected pneumatic actuator 1 through shaft coupling 5, and the top of pneumatic actuator 1 is equipped with rotation axis 2, and its characterized in that, the top of rotation axis 2 is equipped with 1L type spacing movable block 8, and the upper surface of pneumatic actuator 1 is equipped with 1 spacing quiet piece 9 of 90 degrees.

The utility model has the advantages that:

1) the air inlet valve can be effectively ensured not to be opened under the condition that the exhaust valve is not closed, and the accident of leakage of a large amount of gas is avoided;

2) the improved structure is simple to modify, the times of field maintenance and part replacement are reduced, the production cost is greatly reduced, and the working efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of a pneumatic valve with a limiting function.

In the figure, 1 is a pneumatic actuator, 2 is a rotating shaft, 3 is a fastening bolt, 4 is a right cavity air inlet, 5 is a coupling, 6 is a butterfly valve, 7 is a left cavity air inlet, 8 is an L type limit movable block, and 9 is a 90 degree limit static block.

Detailed Description

As shown in figure 1, the pneumatic valve with the limiting function structurally comprises a pneumatic actuator 1, a rotating shaft 2, a coupling 5 and a butterfly valve 6, wherein the upper part of the butterfly valve 6 is connected with the pneumatic actuator 1 through the coupling 5, the rotating shaft 2 is arranged at the top of the pneumatic actuator 1, and the pneumatic valve is characterized in that the top of the rotating shaft 2 is provided with 1L-shaped limiting movable block 8, and the upper surface of the pneumatic actuator 1 is provided with 1 90-degree limiting static block 9.

The top end of the rotating shaft 2 is provided with 1 fastening bolt 3.

The left side of the middle of the pneumatic actuator 1 is provided with a left cavity air inlet 7, the right side of the middle of the pneumatic actuator 1 is provided with a right cavity air inlet 4, and when the pneumatic actuator operates, the electromagnetic directional valve controls air to enter from the right cavity air inlet 4 or the left cavity air inlet 7 to drive the rotating shaft 2 in the pneumatic actuator 1 to rotate so as to drive the butterfly valve 6 to rotate.

And an opening contact and a closing contact are respectively arranged on two sides of the 90-degree limiting static block 9.

In actual operation, the opening and closing actions of the pneumatic valve are controlled by the rotation shaft 2 in the pneumatic actuator 1 to rotate, the butterfly valve 6 is driven to rotate through the coupling 5, when the rotation shaft 2 in the pneumatic actuator 1 rotates, the butterfly valve 6 is driven to rotate through the coupling 5, meanwhile, the L-type limit moving block 8 is also driven to rotate through the rotation shaft 2, the opening contact and the closing contact of the 90-degree limit static block 9 are respectively touched, the opening and closing two contacts of the limit switch are set in the program of P L C, namely the condition that the pneumatic valve is opened can be confirmed when the opening condition of the pneumatic valve does not include the opening signal of the reversing valve and also includes the opening signal of the limit switch, and the next program can be entered into P L C.

The utility model discloses a detect the switch action of pneumatic valve, set for the limit switch contact signal of pneumatic valve as the switching signal of pneumatic valve at P L C procedure, ensure not to close at the bleeder valve and just can not open under the condition to stop the occurence of failure of a large amount of gases to leak.

Claims

1. The pneumatic valve with the limiting function structurally comprises a pneumatic actuator (1), a rotating shaft (2), a coupling (5) and a butterfly valve (6), wherein the upper part of the butterfly valve (6) is connected with the pneumatic actuator (1) through the coupling (5), the rotating shaft (2) is arranged at the top of the pneumatic actuator (1), and the pneumatic valve is characterized in that 1L-type limiting moving block (8) is arranged at the top of the rotating shaft (2), and 1 90-degree limiting static block (9) is arranged on the upper surface of the pneumatic actuator (1).

2. A pneumatic valve with limit function as claimed in claim 1, wherein the top of the rotating shaft (2) is provided with 1 fastening bolt (3).

3. The pneumatic valve with the limiting function according to claim 1, wherein a left cavity air inlet (7) is arranged on the left side of the middle of the pneumatic actuator (1), and a right cavity air inlet (4) is arranged on the right side of the pneumatic actuator, and when the pneumatic actuator is operated, the electromagnetic directional valve controls air to be fed from the right cavity air inlet (4) or the left cavity air inlet (7) to drive the rotating shaft (2) in the pneumatic actuator (1) to rotate so as to drive the butterfly valve (6) to rotate.

4. A pneumatic valve with limit function according to claim 1, wherein said 90 ° limit static block (9) is provided with an opening contact and a closing contact on both sides.