一种用于钢管水压试验机的注水排气阀

Abstract

本实用新型涉及钢管水压试验技术领域，且公开了一种用于钢管水压试验机的注水排气阀，包括阀体，所述阀体的内部设置有柱塞腔，所述柱塞腔的内部设置有柱塞本体。该用于钢管水压试验机的注水排气阀，本注水排气阀独特的多级密封结构设计，通过Y型密封垫与密封凸垫的嵌合结构，形成第一道密封屏障，Y型密封垫的凹槽与密封凸垫的凸起部紧密咬合，可随水压自适应增强贴合度；下方的O型密封圈嵌入密封槽内，与柱塞本体外端紧密接触，形成第二重密封，双重密封设计有效阻止高压水流泄漏，确保保压阶段压力稳定，提升钢管密封性检测的精准度，提高了用于钢管水压试验机的注水排气阀的实用性。

Claims

1. A water filling and venting valve for a steel pipe hydrostatic testing machine comprising a valve body (1) characterised in that: The valve body (1) is provided with a plunger cavity (2) inside, and a plunger body (3) is provided inside the plunger cavity (2). A Y-shaped sealing gasket (4) is provided between the plunger cavity (2) and the plunger body (3). A sealing convex gasket (5) is provided at the lower end of the Y-shaped sealing gasket (4). The protrusion of the sealing convex gasket (5) is inserted into the groove of the Y-shaped sealing gasket (4).

2. The water filling and exhausting valve for a steel pipe hydrostatic testing machine according to claim 1, characterized in that: The plunger cavity (2) is surrounded by a sealing groove (6), and an O-ring (7) is provided inside the sealing groove (6). The inner wall of the O-ring (7) is connected to the outer end of the plunger body (3), and the O-ring (7) is located below the sealing convex pad (5).

3. The water filling and exhausting valve for the steel pipe hydraulic testing machine according to claim 1, characterized in that: A guide sleeve (8) is provided between the plunger cavity (2) and the plunger body (3). The guide sleeve (8) is fitted on the outer end of the plunger body (3). The guide sleeve (8) is located above the Y-shaped sealing gasket (4). A bushing (9) is provided above the guide sleeve (8). The bushing (9) is fitted on the upper part of the outer end of the plunger body (3).

4. The water filling and exhausting valve for a steel pipe hydraulic tester according to claim 1, characterized in that: The upper end of the valve body (1) is provided with a cylinder seat (10), and the cylinder seat (10) and the valve body (1) are connected by a number of internal hexagon screws (11). The internal hexagon screws (11) are arranged in a ring array at the connection between the cylinder seat (10) and the valve body (1).

5. A water injection and venting valve for a steel pipe hydrostatic testing machine according to claim 4, characterized in that: The upper end of the cylinder seat (10) is provided with a water injection valve cylinder (12), and the lower end of the water injection valve cylinder (12) is provided with a connecting rod (13), which is connected to the plunger body (3).

6. The water filling and exhausting valve for a steel pipe hydraulic tester according to claim 5, characterized in that: The connecting rod (13) and the plunger body (3) are connected by fastening bolts (14), and an exhaust hole (15) is provided through the outer end of the cylinder seat (10).

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