JPH0533883A - Valve inspecting device - Google Patents

Abstract

PURPOSE:To automatize inspection safe and rationalized by constituting a device of a valve supporting base, valve flow path seal unit, valve operating member rotary unit, device for applying a fluid pressure into a valve and a connecting device of these members, in the case of the valve inspecting device for a gate valve or the like. CONSTITUTION:A valve supporting base 11 is set travelpbly on a rail 22 of a portal frame 21 to carry in/out a valve 1. Seal jigs 25, 26 driven by a pair of right/left seal cylinder devices 23, 24 are provided in both sides of this portal frame 21 to constitute a seal unit receiving. Receiving ports 2, 3 of the valve are supply air into the valve 1 from a pressure device 14 through a fluid pressure port 27. An operating jig 31 of an operating member rotary unit 13 is lowered down from above the valve 1 and mounted/removed to/from an operating member 4. The operating member rotary unit 13, seal unit 12 and the pressure device 14 are controlled by a control unit 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve inspection device for gate valves, ball valves and the like.

[0002]

2. Description of the Related Art Conventionally, a valve provided with an operating member (handle) such as a gate valve and a ball valve has an operating torque test for inspecting whether it can be opened and closed with a constant operating torque. The valve seat leak test, which inspects for fluid leaks, is performed manually.

[0003]

When the valve operating torque test, the valve seat leakage test, etc. are manually performed, there are the following problems.

Since the opening / closing operation of the operation member is required, the operation time is required and the productivity is low. The operation torque test requires a torque wrench, and in particular, a large valve requires a large torque wrench, which is complicated. Should the valve be defective, the valve box and other parts will burst, and manual inspection is dangerous.

It is an object of the present invention to automate the inspection of valves to ensure the safety and rationalization of inspection work.

[0006]

According to the present invention, there is provided a valve support base, a sealing device for sealing a flow path of a valve, an operating member rotating device for rotating an operating member of the valve, and an internal valve sealed by the sealing device. And a control device for controlling the sealing device, the operating member rotating device and the pressurizing device.

[0007]

According to the present invention, there are the following actions. The valve is mechanically sealed by a sealing device, and the operating member is mechanically opened and closed by an operating member rotating device, and a fluid pressure is mechanically applied to the inside of the valve by a pressurizing device. Then, the control device can execute an operation torque test, a valve seat leakage test, a valve pressure resistance test, and the like. Therefore, the inspection time can be shortened to improve the productivity and the workability for the inspection can be simplified.

Since it does not require manual labor, it is safe even if the valve box or the like is ruptured due to a defective valve.

[0009]

FIG. 1 is a schematic diagram showing a valve inspection device according to an embodiment of the present invention. The valve inspection device 10 is used for an operation torque test of the valve 1 such as a gate valve and a ball valve.
The valve seat leakage test, the valve pressure resistance test, and the like can be executed, and the valve support base 11, the sealing device 12, the operating member rotating device 13, the pressurizing device 14, and the control device 15 are provided.

The valve support base 11 is installed so as to be able to travel on a rail 22 extending inside and outside the gate frame 21.
Even if the valve 1 is large, it can be easily loaded / unloaded to / from the inspection position.

The sealing device 12 is a pair of left and right hydraulic cylinders, pneumatic cylinders and other sealing cylinder devices 23 and 24 provided on both sides of the portal frame 21, and a sealing jig driven by each sealing cylinder device 23 and 24. 25,
And 26. The respective sealing jigs 25 and 26 are operated by the corresponding sealing cylinder devices 23 and 24,
The receptacles 2 and 3 on both sides of the valve 1 can be sealed. The sealing jigs 25 and 26 may be driven by a screw feeding device using a motor. The one sealing jig 25 is provided with a fluid pressurizing port 27, and the other sealing jig 26 is provided with a fluid discharge port 28. Fluid pressurizing port 2
A pressurizing device 14 is connected to 7, and an opening / closing valve such as a solenoid valve (not shown) is connected to the fluid discharge port 28.

The operating member rotating device 13 includes a gate frame 2
1, an operation jig 31 that can be engaged with the operation member 4 (handle) of the valve 1, and an operation motor 32 such as a hydraulic motor or a geared motor for driving the operation jig 31; The operation jig 31 and the operation motor 32 are connected to the valve 1
And an elevating cylinder device 33 that can be lifted up and down from above to allow the operating jig 31 to engage with and disengage from the operating member 4 of the valve 1.

The pressurizing device 14 can apply a fluid pressure such as air or water into the fluid passage of the valve 1 through the fluid pressurizing port 27 of the sealing device 12. Airtightness can be inspected by applying air, and watertightness can be inspected by applying water.

The control device 15 controls the sealing device 12, the operating member rotating device 13 and the pressurizing device 14, and the following (A)-
Inspect the valve as shown in (C). The controller 15
Prior to the following (A) to (C), the sealing device 12 is operated to seal the receiving ports 2 and 3 on both sides of the valve 1.

(A) Operation Torque Test The control device 15 operates the lift cylinder device 33 of the operation member rotating device 13 to press the operation jig 31 against the operation member 4 of the valve 1 and drive the operation motor 32. The operation member 4 is operated to rotate. At this time, the control device 15 manages the torque with which the operating motor 32 of the operating member rotating device 13 rotates the operating member 4, and executes the operating torque test.

Specifically, a torque limiting device is provided in the drive system of the operating member 4 by the operating motor 32, and it is checked whether or not the operating member 4 can be rotated with a predetermined torque. The abnormality of the result of the operation torque test is displayed by, for example, a buzzer.

(B) Valve Seat Leakage Test The controller 15 pressurizes the valve 1 under the condition that the operating member rotating device 13 fully closes the valve 1 with the predetermined torque of (A) following the above (A). The valve seat leakage test is executed by operating the device 14 to apply the fluid pressure to the fluid passage of the valve 1 and detecting the reduced state of the applied pressure after the lapse of a certain holding time. The abnormality of the result of the valve seat leakage test is displayed by, for example, a buzzer.

(C) Valve pressure resistance test The control device 15 continues to the above (B) and operates the pressurizing device 14 under the condition that the valve 1 is opened by the operating member rotating device 13 to operate the fluid passage of the valve 1. A valve pressure resistance test is executed by applying a fluid pressure to the inside and detecting the reduced state of the applied pressure after a certain holding time. The abnormal result of the valve pressure resistance test is displayed, for example, by a buzzer or the like.

Next, the operation of the above embodiment will be described. The valve 1 is mechanically sealed by a sealing device 12, the operating member 4 is mechanically opened and closed by an operating member rotating device 13, and a fluid pressure is mechanically applied to the inside of the valve 1 by a pressurizing device 14. .. Then, the control device 15 can execute an operation torque test, a valve seat leakage test, a valve pressure resistance test, and the like. Therefore, the inspection time can be shortened to improve the productivity and the workability for the inspection can be simplified.

Since it does not require manual labor, it is safe even if the valve box or the like is ruptured due to a defect of the valve 1.

The valve inspection apparatus of the present invention requires that the rotation angle of the valve from fully closed to fully open requires several rotations.
It can be applied to anything such as a degree.

[0022]

As described above, according to the present invention, the inspection of the valve can be automated, and the safety and rationalization of the inspection work can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic view showing a valve inspection device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 valve 4 operating member 10 valve inspection device 11 valve support 12 sealing device 13 operating member rotating device 14 pressurizing device 15 control device

Claims (1)

Claim: What is claimed is: 1. A valve support base, a sealing device for sealing a flow path of a valve, an operating member rotating device for rotating an operating member of the valve, and a fluid inside the valve sealed by the sealing device. A valve inspection device configured to include a pressurizing device that can apply pressure, a sealing device, an operating member rotating device, and a control device that controls the pressurizing device.