CN213516236U - Sealing test device for check valve - Google Patents

Abstract

The utility model discloses a be used for check valve seal test device, including export blind plate, the end cap, sealed pad, the pressure gauge joint connects, imports the blind plate, the screw rod, nut and manometer. And a plurality of screw rods and nuts are connected between the outlet blind plate and the inlet blind plate. The check valve is installed between the outlet blind plate and the inlet blind plate. And the check valve and the outlet blind plate are provided with sealing gaskets. And the check valve and the inlet blind plate are provided with sealing gaskets. A first through hole is formed in the joint of the check valve and the outlet blind plate and the check valve, and a joint is connected to one side of the first through hole. The beneficial effects of the utility model reside in that: use the utility model provides a check valve seal test device changes through observation test pressure so, alright with inspect valve seal nature directly perceivedly to promote the check valve and add maintenance quality and equipment reliability. The device is simple in structure, convenient and reliable in operation and wide in application range, and test results are convenient and reliable to read.

Description

Sealing test device for check valve

Technical Field

The utility model belongs to nuclear power station check valve maintenance field, concretely relates to be used for check valve seal test device.

Background

Due to the special automatic non-return function, the non-return valve is widely applied to various water and steam loop systems of the nuclear power station. However, due to long-term medium scouring, frequent opening and closing and frequent occurrence of leakage defects of the check valve, in the process of overhauling and maintaining the check valve, the sealing surfaces of the valve clack and the valve seat need to be ground and the sealing performance needs to be verified, the sealing performance is verified only by checking the pressing line of the sealing surface through a blue oil test in the existing check valve overhauling procedure, the verification mode depends on the skill level of an operator to a great extent, and the sealing performance of the valve cannot be completely guaranteed. Once the valve is not tightly sealed, the valve can be repeatedly out of service, and manpower and material resources are wasted.

Therefore, the check valve sealing test device is designed and manufactured, the check valve after maintenance is subjected to sealing test, the valve sealing performance can be quickly, conveniently and conveniently verified, the valve sealing reliability is ensured, and the stable operation of a power station system is ensured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a be used for check valve seal test device, it can solve the problem that the check valve overhauls the unable reliable verification of in-process leakproofness, promotes check valve maintenance quality.

The technical scheme of the utility model as follows: the utility model provides a be used for check valve seal test device, includes the export blind plate, the end cap, sealed the pad, the manometer connects, import blind plate, screw rod, nut and manometer.

And a plurality of screw rods and nuts are connected between the outlet blind plate and the inlet blind plate.

The check valve is installed between the outlet blind plate and the inlet blind plate.

And the check valve and the outlet blind plate are provided with sealing gaskets.

And the check valve and the inlet blind plate are provided with sealing gaskets.

A first through hole is formed in the joint of the check valve and the outlet blind plate and the check valve, and a joint is connected to one side of the first through hole.

And a second through hole is formed at the joint of the check valve and the inlet blind plate and the check valve, and one side of the second through hole is connected with a plug.

The check valve and the outlet blind plate are also provided with a third through hole which is communicated with the joint of the outlet blind plate and the check valve, the top of the third through hole is connected with a pressure gauge joint, and the pressure gauge joint is connected with a pressure gauge.

The check valve and the outlet blind plate and the inlet blind plate are of plate-shaped structures.

The sealing gasket is made of polytetrafluoroethylene.

The beneficial effects of the utility model reside in that: use the utility model provides a check valve seal test device changes through observation test pressure so, alright with inspect valve seal nature directly perceivedly to promote the check valve and add maintenance quality and equipment reliability. The device is simple in structure, convenient and reliable in operation and wide in application range, and test results are convenient and reliable to read.

Drawings

Fig. 1 is a schematic view of a sealing test device for a check valve provided by the present invention.

In the figure, 1 outlet blind plate, 2 plugs, 3 sealing gaskets, 4 pressure gauge joints, 5 joints, 6 inlet blind plates, 7 screw rods, 8 nuts, 9 pressure gauges, 10 check valves, 11 first through holes, 12 second through holes and 13 third through holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in figure 1, the device for testing the sealing of the check valve comprises an outlet blind plate 1, a plug 2, a sealing gasket 3, a pressure gauge joint 4, a joint 5, an inlet blind plate 6, a screw 7, a nut 8 and a pressure gauge 9.

Wherein, be connected with a plurality of screw rods 7 and nut 8 between export blind plate 1 and the import blind plate 6, check valve 10 is installed between export blind plate 1 and import blind plate 6, check valve 10 all is provided with sealed 3 with export blind plate 1 and import blind plate 6, it has first through-hole 11 to open with check valve 10 junction on the export blind plate 1, one side of first through-hole 11 is connected with joint 5, joint 5 can connect the hydraulic pump, it has second through-hole 12 to open with check valve 10 junction on the import blind plate 6, one side of second through-hole 12 is connected with end cap 2, it communicates with each other with check valve 10 junction on third through-hole 13 and the export blind plate 1 still to open on the export blind plate 1, the top of third through-hole 13 is connected with manometer joint 4, manometer joint 4 is connected with manometer 9.

The outlet blind plate 1 and the inlet blind plate 6 are of plate-shaped structures, and four groups of screws 7 and nuts 8 are provided.

The following description is made with reference to fig. 1:

the check valve is reliably clamped through the inlet and outlet blind plates and the connecting screw rod, sealing force is provided, and the inlet and the outlet of the check valve are sealed with the blind plates through the sealing gaskets 3. Wherein the sealing gasket 3 is made of polytetrafluoroethylene and can be processed and manufactured according to the connection form (welding type or flange type) of the inlet and the outlet of the valve;

processing an internal thread interface on an inlet blind plate and communicating the internal thread interface with an inlet of a check valve to serve as a hydraulic pump interface, processing a pressure gauge interface on the side surface of the inlet blind plate, connecting the pressure gauge interface and installing a pressure gauge;

and thirdly, reserving a threaded connector at the side of the outlet blind plate, serving as a leakage observation point for a valve sealing test, and realizing the sealing test of the check valve body and the middle flange by additionally arranging a plug.

Carry out check valve seal test through sealed test device, the core lies in:

the check valve is reliably clamped, and an inlet and an outlet are effectively sealed;

providing a pressing interface and a pressure detection interface;

and realizing two functions of the check valve clack, the valve seat sealing test and the valve body and middle flange sealing test.

The main innovation points of the sealing test device are as follows:

1. the special valve sealing surface structure can be used for pressing a welding type check valve and is also suitable for a flange type check valve sealing test, and the application range is wide;

2. the experimental device is simple and reliable, the operation is convenient, and the test result is read visually and conveniently.

Claims (1)

1. The utility model provides a be used for check valve seal test device which characterized in that: the pressure gauge comprises an outlet blind plate, a plug, a sealing gasket, a pressure gauge joint, a joint, an inlet blind plate, a screw, a nut and a pressure gauge;

a plurality of screws and nuts are connected between the outlet blind plate and the inlet blind plate;

the check valve is arranged between the outlet blind plate and the inlet blind plate;

the check valve and the outlet blind plate are provided with sealing gaskets;

the check valve and the inlet blind plate are provided with sealing gaskets;

a first through hole is formed in the joint of the check valve and the outlet blind plate and the check valve, and one side of the first through hole is connected with a joint;

a second through hole is formed in the joint of the check valve and the inlet blind plate and the check valve, and a plug is connected to one side of the second through hole;

a third through hole is formed in the check valve and the outlet blind plate and is communicated with the joint of the outlet blind plate and the check valve, the top of the third through hole is connected with a pressure gauge joint, and the pressure gauge joint is connected with a pressure gauge;

the check valve and the outlet blind plate and the inlet blind plate are of plate-shaped structures;

the sealing gasket is made of polytetrafluoroethylene.

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