Spiral gland blow-off valve core

Abstract

The utility model discloses a valve core for high pressure air blowing, which is a core component of a high pressure air blowing valve. The valve core comprises a valve core base body, a valve core nut, a valve core gasket, a spiral gland and a rubber gasket. The upper part of the valve core base body is a screw rod, which cooperates with the valve core nut and the valve core gasket to fix the inner side of the rubber gasket. The middle part of the valve core base body is a groove with external threads, the rubber gasket is installed inside the groove, the spiral gland is installed outside the groove, and the rubber gasket is compressed at the outer edge. The lower part of the valve core base body is a hollow structure for installing a spring, and four through holes are arranged on the valve core base body for balancing air pressure. The spiral gland type blowing valve core of the utility model uses the spiral gland to fix the rubber gasket, effectively eliminates the defect that the rubber gasket is easily blown by high pressure and high speed air flow, greatly improves the service life of the rubber gasket, and reduces the failure rate of the high pressure air blowing valve.

Description

Technical Field

[0001] This utility model relates to a valve core for high-pressure air purging, which is the core component of a high-pressure air purging valve. Background Technology

[0002] The basic function of a high-pressure air purging valve is to achieve a sealed isolation of the high-pressure air purging pipeline. The working principle of existing high-pressure air purging valves is as follows: during high-pressure air purging, the valve core, under the action of high-pressure air, overcomes the spring force and moves away from the valve seat, allowing the high-pressure air pipeline to continue flowing. After purging, the valve core returns to its initial position under the action of the spring force, relying on the tight sealing surface of the rubber gasket against the valve seat to achieve the valve's sealing function. Therefore, whether the rubber gasket remains intact after purging determines whether the valve still possesses the basic function of achieving a normal seal.

[0003] During the high-pressure air purging process, the rubber gasket of the existing purging valve core is easily blown apart or even blown away by the high-pressure, high-speed airflow, causing leakage of the high-pressure air purging valve, resulting in a very high failure rate, which seriously affects subsequent work and even personnel safety. Summary of the Invention

[0004] To reduce the failure rate of high-pressure air purging valves and address the defect that the rubber gasket on the purging valve core is easily blown apart during high-pressure air purging, this utility model provides a purging valve core with a spiral cap to fix the rubber gasket. This ensures that the rubber gasket is firmly fixed during high-pressure air purging, effectively preventing it from being blown apart by the high-pressure, high-speed airflow.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a spiral-capped blow-out valve core, comprising a valve core base, a valve core nut, a valve core gasket, a spiral cap, and a rubber gasket. The upper part of the valve core base is a screw, which cooperates with the valve core nut and valve core gasket to fix the inner side of the rubber gasket. A through hole is provided at the upper part of the screw for installing an anti-loosening pin. The middle part of the valve core base is a groove with external threads. The rubber gasket is installed inside the groove, and the spiral cap is installed outside the groove to press the outer edge of the rubber gasket. The lower part of the valve core base is a hollow structure for installing a spring, and four through holes are provided on it for balancing air pressure.

[0006] The aforementioned spiral-cap type purge valve core, after being installed inside the high-pressure air purge valve, can move up and down under the force of the spring and the pressure of the high-pressure air. During high-pressure purge, the valve core moves downward under the action of the high-pressure air, opening the passage and allowing high-pressure air to pass through. At this time, because the rubber gasket is firmly fixed by the spiral cap, it is no longer easily blown apart by the high-pressure, high-speed airflow. When purge stops, the valve core moves upward under the action of the spring, closing the passage and forming an effective seal through the rubber gasket.

[0007] The beneficial effects of this utility model are: the spiral cap type blow-out valve core of this utility model uses a spiral cap to fix the rubber gasket, which effectively eliminates the defect that the rubber gasket is easily blown apart by high-pressure and high-speed airflow, greatly improves the service life of the rubber gasket, and reduces the failure rate of the high-pressure air blow-out valve. Attached Figure Description

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0009] Figure 1 This is a schematic diagram of the present invention.

[0010] In the diagram: 1. Valve core base, 2. Valve core nut, 3. Valve core gasket, 4. Screw cap, 5. Rubber gasket, 6. Spring. Detailed Implementation

[0011]

Example 1

[0012] The spiral-cap type purge valve core, after being installed inside the high-pressure air purge valve, can move up and down under the force of the spring 6 and the pressure of the high-pressure air. During high-pressure purge, the valve core moves downward under the action of the high-pressure air, opening the passage and allowing high-pressure air to pass through. At this time, because the rubber gasket 5 is firmly fixed by the spiral cap 4, it is no longer easily blown apart by the high-pressure, high-speed airflow. When purge stops, the valve core moves upward under the action of the spring 6, closing the passage and forming an effective seal through the rubber gasket 5.

[0013]

Example 2

Claims

1. A spiral-capped blow-out valve core, comprising a valve core base (1), a valve core nut (2), a valve core gasket (3), a spiral cap (4), and a rubber gasket (5), characterized in that, The upper part of the valve core base (1) is a screw, which cooperates with the valve core nut (2) and the valve core gasket (3) to fix the inner side of the rubber gasket (5). The upper part of the screw has a through hole for installing the anti-loosening pin. The middle part of the valve core base (1) is a groove with external threads. The rubber gasket (5) is installed inside the groove. The spiral cap (4) is installed outside the groove to press the outer edge of the rubber gasket (5). The lower part of the valve core base (1) is a hollow structure for installing the spring (6). Four through holes are provided on it for balancing the air pressure.

2. The spiral-capped blow-out valve core according to claim 1, characterized in that, After being installed inside the high-pressure air purging valve, the valve core can move down under the action of high-pressure air during high-pressure purging, the channel opens, and high-pressure air passes through. Since the rubber gasket (5) has been firmly fixed by the spiral cap (4), it is no longer easily blown apart by the high-pressure and high-speed airflow. When purging stops, the valve core moves up under the action of the spring (6), the channel closes, and an effective seal is formed through the rubber gasket (5).

3. The spiral-capped blow-out valve core according to claim 1, characterized in that, The rubber gasket (5) is installed in the groove in the middle of the valve core base (1). The fixing method is double fixing on the inner and outer sides. The inner side is the valve core nut (2) which is connected to the screw on the upper part of the valve core base (1) through the thread to press the valve core gasket (3). The valve core gasket (3) then presses the inner edge of the rubber gasket (5). The outer side is the spiral cap (4) which is connected to the groove in the middle of the valve core base (1) through the thread to press the outer edge of the rubber gasket (5).

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