CN209725417U - A structure for mechanical locking of water inlet ball valve maintenance seal - Google Patents

Abstract

The utility model discloses a mechanical locking structure for the maintenance seal of an inlet ball valve, which adopts a combination structure of a lock nut, a lock rod and a lock wedge, and drives the lock rod by rotating the lock nut so that the lock wedge enters between the maintenance seal and the upstream flange. , to ensure that the maintenance seal will not exit when it is misoperated. And limit devices are set at the input end and the exit end to avoid jamming and water leakage. It has a compact structure and high safety, and can be widely used in water turbine inlet ball valves.

Description

A structure for mechanical locking of water inlet ball valve maintenance seal

technical field

The utility model relates to a hydraulic turbine inlet ball valve maintenance sealing mechanical locking structure:

Background technique

The maintenance seal of the water turbine inlet ball valve is set on the upstream side of the ball valve, and it can only be put into use when the unit is overhauled. After the maintenance seal is put into use, it can block the water flow and ensure that the maintenance personnel can perform maintenance on the rear parts of the ball valve of the unit when the upstream pressure steel pipe is not drained. In order to prevent accidental opening of the maintenance seal from causing harm to the maintenance personnel, a locking device is installed between the maintenance seal, the valve body and the upstream flange to ensure that the maintenance seal is always in the active state during unit maintenance, ensuring the safety of the power station and maintenance personnel.

At present, most of the maintenance and sealing locks of domestic water inlet ball valves are made of screw rods. After the inspection seal is put in, the screw is rotated to make the input rod put in, and the inspection seal ring is blocked from the rear. With this structure, there is no limit to the input position and withdrawal position of the screw, and the input and withdrawal positions can only be set artificially. It often occurs that the input is too large and the withdrawal is difficult, or the withdrawal is too large, and the sealing ring jumps out and leaks.

Contents of the invention

The purpose of this utility model is to provide a hydraulic turbine inlet ball valve inspection and sealing mechanical locking structure, the locking device is installed on the valve body, which can prevent the maintenance seal from being opened by mistake after the maintenance seal is put in, and has the function of putting in and out of the limit position at the same time. Reduce jamming and water leakage of the locking device to ensure the safety of the power station and maintenance personnel.

The purpose of this utility model is achieved through the following technical solutions: the locking wedge (1) is connected with the locking rod (2), the locking rod (2) is closed on the locking nut (6) through the nut (7), and the thrust block (10) Connect the locking wedge (1) through the bolt (3), the limit plate (8) is installed between the guide sleeve (5) and the locking nut (6), and the rotating locking nut (6) drives the locking wedge The block (1) moves up and down in the guide sleeve (5), and the maintenance seal (12) is locked between the valve body (4) and the upstream flange (11), and the rubber ring (9) ensures that the valve body (4) Pressure water will not leak out.

The utility model advantage is:

1. Simple operation, compact structure and reliable structure;

2. It has double limits for input and exit, reducing the risk of water leakage or jamming;

3. It has high safety and can be widely used in water turbine inlet ball valves.

Description of drawings

Fig. 1 is a schematic diagram of the utility model structure put into state

Fig. 2 is the schematic diagram of exit state of structure of the present utility model

Detailed ways

As shown in Figure 1, the utility model is a hydraulic turbine inlet ball valve maintenance sealing mechanical locking structure, the locking wedge 1 is connected with the locking rod 2, the locking rod 2 is connected to the locking nut 6 through the nut 7, and the thrust block 10 The locking wedge 1 is connected by the bolt 3, the limit plate 8 is installed between the guide sleeve 5 and the lock nut 6, and the rotation of the lock nut 6 drives the lock wedge 1 to move up and down in the guide sleeve 5 to realize the locking of the maintenance seal 12 Between the valve body 4 and the upstream flange 11, the rubber ring 9 ensures watertightness.

Although the above has described basic principles and main features of the present utility model in conjunction with the accompanying drawings. Those skilled in the industry should understand that the above-mentioned embodiments do not limit the utility model in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation all fall within the protection scope of the utility model.

Claims (1)

1. a kind of structure for water intake ball valve maintenance sealing machine locking, it is characterized in that: locking voussoir (1) and locking level (2) Connection, locking level (2) are fixed on conjunction on lock nut (6) by nut (7), and thrust block (10) is solid closing by bolt (3) It is scheduled in locking voussoir (1), limit plate (8) is mounted between guide sleeve (5) and lock nut (6), spin locking nut (6) band Dynamic locking voussoir (1) moves up and down in guide sleeve (5), realizes that maintenance sealing (12) is locked in valve body (4) and upstream flange (11) between and rubber ring (9) is water-tight.