Pressure test device for leading out simple gauge valve from pressure test pump

Abstract

The utility model relates to the technical field of pressure testing devices, and discloses a pressure testing device for leading out a simple gauge valve from a pressure testing pump, which comprises a device base, a lower pressure testing base is arranged in the middle of the upper end of the device base, an O-shaped sealing ring is arranged on the inner side of the upper end of the lower pressure testing base, a water inlet connector is arranged on one side of the lower pressure testing base, and a water outlet connector is arranged on the other side of the lower pressure testing base. The upper end of the O-shaped sealing ring is provided with a water seal, the upper end of the water seal is provided with a water inlet end socket cover, an upper pressure test base is arranged over the water inlet end socket cover, the bottom of the inner side of the upper pressure test base is provided with a polytetrafluoroethylene water outlet connector, and the inner side of the top of the upper pressure test base is provided with a split ring. A valve rod is arranged at the axis of the split ring, and the outer side of the valve rod and the outer side of the split ring are sleeved with a water outlet sealing cover. According to the utility model, the pressing force can be controlled, so that a small-caliber valve is not easy to press and deform, and in addition, the problems that the length of a DN4-DN10 valve structure is relatively small and is about 50-150mm, and a pressure test pump cannot carry out a water pressure test on a DN4-DN20 gauge valve are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure test devices, in particular to a pressure test device for a simple instrument valve led out by a pressure test pump. Background Technique

[0002] Generally, the pressure test pumps purchased by power plants and valve manufacturing companies are large-range and high-parameter pressure test pumps, which can meet the water pressure tests of large-diameter valves with DN20 - DN650. The clamping force and range of the pressure test pumps that can meet DN20 - DN650 are relatively large. The uncontrollable clamping force is likely to deform small-diameter valves. In addition, the structural length of valves with DN4 - DN10 is relatively small, about 50 - 150 mm, and the pressure test pump cannot conduct the water pressure test on the instrument valves with DN4 - DN20. Content of the Utility Model

[0003] The purpose of the utility model is to provide a pressure test device for a simple instrument valve led out by a pressure test pump to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution:

[0005] A pressure test device for a simple instrument valve led out by a pressure test pump includes a device base. In the middle of the upper end of the device base, a lower pressure test base is provided. Inside the upper end of the lower pressure test base, an O-ring seal is provided. On one side of the lower pressure test base, a water inlet joint is provided. Above the O-ring seal, a water seal is installed. Above the water seal, a water inlet head cover is installed. Directly above the water inlet head cover, an upper pressure test base is provided. At the bottom inside of the upper pressure test base, a polytetrafluoroethylene water outlet joint is provided. Inside the top of the upper pressure test base, a split ring is provided. At the axis of the split ring, a valve stem is provided. The outside of the valve stem and the split ring is sleeved with a water outlet cover. Directly above the upper pressure test base, a guide plate is provided. The guide plate and the upper pressure test base are connected by the valve stem. The valve stem is connected to a guide rod through the guide plate. On both sides of the upper end of the device base, brackets are provided. The upper end of the valve stem passes through the brackets, and the upper part of the valve stem is welded to the brackets through a bearing seat. Inside the seat body of the bearing seat, a valve stem nut is provided. On the valve stem nut, a bearing is provided. Above the bearing, a bearing gland is provided. At the uppermost end of the valve stem, a handwheel is sleeved through a connecting piece. Above the handwheel, a locking nut is provided.

[0006] As a preferred technical solution of the utility model, the upper and lower ends of the guide rod pass through the brackets and the device base respectively and are locked by nuts.

[0007] As a preferred technical solution of the utility model, the water inlet joint is a polytetrafluoroethylene water inlet joint.

[0008] As a preferred technical solution of the present utility model, the sealing surfaces of the water inlet joint and the polytetrafluoroethylene water outlet joint can be arbitrarily turned and replaced.

[0009] As a preferred technical solution of the present utility model, the lower pressure test base is welded to the device base, and a replaceable O-ring seal and a polytetrafluoroethylene water inlet joint are built-in. The water inlet head cover, the O-ring seal and the water inlet joint are pressed tightly to form the water inlet side of the device. The upper pressure test base, the polytetrafluoroethylene water outlet joint, the split ring, the valve stem and the water outlet cover form the water outlet side.

[0010] As a preferred technical solution of the present utility model, the handwheel rotates the valve stem nut to drive the valve stem to connect the upper and lower movements of the water outlet side.

[0011] Compared with the prior art, the present utility model has the following beneficial effects:

[0012] The present utility model can control the pressing force, so that small-diameter valves are not easily deformed by pressing. In addition, it solves the problem that the structural length of valves with DN4-DN10 is relatively small, about 50-150 mm, and the pressure test pump cannot perform the hydrostatic test on the instrument valves with DN4-DN20. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects and advantages of the present application will become more apparent:

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the valve stem of the present utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the lower pressure test base of the present utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the upper pressure test base of the present utility model;

[0018] Figure 5 It is a schematic diagram of the working state when the present utility model tests the instrument valve test piece.

[0019] In the figure: 1. Device base; 2. Lower pressure test base; 3. O-ring seal; 4. Water inlet joint; 5. Water seal; 6. Water inlet head cover; 7. Instrument valve test piece; 8. Polytetrafluoroethylene water outlet joint; 9. Upper pressure test base; 10. Split ring; 11. Valve stem; 12. Water outlet cover; 13. Guide plate; 14. Bracket; 15. Bearing seat; 16. Valve stem nut; 17. Bearing; 18. Bearing gland; 19. Handwheel; 20. Locking nut; 21. Connecting piece; 22. Guide rod. Detailed implementation mode

[0020] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than limiting the utility model. In addition, it should be noted that for the convenience of description, only the parts related to the utility model are shown in the drawings. The drawings in the embodiments of the present utility model: Different types of hatching lines in the drawings are not marked according to the national standard, nor are the materials of the components required. They are used to distinguish the cross-sectional views of the components in the drawings.

[0021] Please refer to Figures 1-5 , a simple instrument valve pressure test device for a pressure test pump, including a device base 1. A lower pressure test base 2 is arranged in the middle of the upper end of the device base 1. An O-ring 3 is arranged inside the upper end of the lower pressure test base 2. A water inlet joint 4 is arranged on one side of the lower pressure test base 2. A water seal 5 is installed on the upper end of the O-ring 3. A water inlet head cover 6 is installed on the upper end of the water seal 5. An upper pressure test base 9 is arranged directly above the water inlet head cover 6. A polytetrafluoroethylene water outlet joint 8 is arranged at the bottom inside the upper pressure test base 9. An open split ring 10 is arranged inside the top of the upper pressure test base 9. A valve stem 11 is arranged at the axis of the open split ring 10. A water outlet seal cover 12 is sleeved outside the valve stem 11 and the open split ring 10. A guide plate 13 is arranged directly above the upper pressure test base 9. The guide plate 13 and the upper pressure test base 9 are connected by the valve stem 11. The valve stem 11 is connected to a guide rod 22 through the guide plate 13. Brackets 14 are arranged on both sides of the upper end of the device base 1. The upper end of the valve stem 11 passes through the brackets 14 and is welded to the brackets 14 by a bearing seat 15. A valve stem nut 16 is arranged inside the seat body of the bearing seat 15. A bearing 17 is arranged on the valve stem nut 16. A bearing gland 18 is arranged at the upper end of the bearing 17. The uppermost end of the valve stem 11 is sleeved with a handwheel 19 through a connecting piece 21. A lock nut 20 is arranged above the handwheel 19.

[0022] Among them, the upper and lower ends of the guide rod 22 pass through the brackets 14 and the device base 1 respectively and are locked by nuts.

[0023] Among them, the water inlet joint 4 is a polytetrafluoroethylene water inlet joint.

[0024] Among them, the sealing surfaces of the water inlet joint 4 and the polytetrafluoroethylene water outlet joint 8 can be arbitrarily turned and replaced.

[0025] Among them, the lower pressure test base 2 is welded to the device base 1, and an interchangeable O-ring 3 and a polytetrafluoroethylene water inlet joint 4 are built-in. The water inlet head cover 6, the O-ring 3 and the water inlet joint 4 are pressed tightly to form the water inlet side of the device. The upper pressure test base 9, the polytetrafluoroethylene water outlet joint 8, the open split ring 10, the valve stem 11 and the water outlet seal cover 12 form the water outlet side.

[0026] Among them, the rotation of the handwheel 19 drives the valve stem nut 16 to drive the valve stem 11 connected to the water outlet side to move up and down.

[0027] The working principle and usage process of the present utility model: First, lead out the water inlet pipe of the pressure test pump and connect it to the water inlet joint 4 on the side of the lower pressure test base 2. The water inlet side of the device is tightly formed by the water inlet sealing head cover 6, the O-ring 3 and the water inlet joint 4. The water outlet side of the device is composed of the upper pressure test base 9, the polytetrafluoroethylene water outlet joint 8, the split ring 10, the valve stem 11 and the water outlet sealing cover 12. Water enters the instrument valve test piece 7 from the water inlet joint 4 on the water inlet side, and the water in the instrument valve test piece 7 is discharged from the polytetrafluoroethylene water outlet joint 8 on the water outlet side. Rotate the handwheel 19 to drive the valve stem nut 16 to drive the valve stem 11 to move downward along the guide rod 22 to tightly press the instrument valve test piece 7 for pressure testing, so as to obtain the sealing pressure resistance value of the instrument valve test piece 7 in the closed state. The guide rod 22 is fixed between the device base 1 and the bracket 14 and is connected to the guide plate 13, so that the water outlet device can only move up and down along the guide rod 22. By rotating the handwheel 19, the pressing force of the instrument valve test piece 7 is controlled between 0 - 36 KN. The sealing surfaces of the water inlet joint 4 and the polytetrafluoroethylene water outlet joint 8 can be arbitrarily turned and replaced. This pressure test device can control the pressing force, making it difficult for small-diameter valves to be deformed by pressing. In addition, it solves the problem that the valve structure length of DN4 - DN10 is relatively small, about 50 - 150 mm, and the pressure test pump cannot perform the water pressure test on the instrument valves of DN4 - DN20. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0028] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A simple instrument valve pressure test device for a pressure test pump, comprising a device base (1), characterized in that: In the middle of the upper end of the device base (1), a lower pressure test base (2) is provided. Inside the upper end of the lower pressure test base (2), an O-ring seal (3) is provided. On one side of the lower pressure test base (2), a water inlet joint (4) is provided. Above the O-ring seal (3), a water seal (5) is installed. Above the water seal (5), a water inlet head cover (6) is installed. Directly above the water inlet head cover (6), an upper pressure test base (9) is provided. At the inner bottom of the upper pressure test base (9), a polytetrafluoroethylene water outlet joint (8) is provided. Inside the top of the upper pressure test base (9), a split ring (10) is provided. At the axis of the split ring (10), a valve stem (11) is provided. Outside the valve stem (11) and the split ring (10), a water outlet cover (12) is sleeved. Directly above the upper pressure test base (9), a guide plate (13) is provided. The guide plate (13) and the upper pressure test base (9) are connected by the valve stem (11). The valve stem (11) is connected to a guide rod (22) through the guide plate (13). On both sides of the upper end of the device base (1), brackets (14) are provided. The upper end of the valve stem (11) passes through the brackets (14). Near the upper end of the valve stem (11), it is welded to the brackets (14) through a bearing seat (15). Inside the seat body of the bearing seat (15), a valve stem nut (16) is provided. On the valve stem nut (16), a bearing (17) is provided. Above the bearing (17), a bearing gland (18) is provided. At the uppermost end of the valve stem (11), a handwheel (19) is sleeved through a connecting piece (21). Above the handwheel (19), a lock nut (20) is provided.

2. The pressure test device for a simple instrument valve led out from a pressure test pump according to claim 1, characterized in that: The upper and lower ends of the guide rod (22) pass through the brackets (14) and the device base (1) respectively and are locked by nuts.

3. The pressure test device for a simple instrument valve led out from a pressure test pump according to claim 1, characterized in that: The water inlet joint (4) is a polytetrafluoroethylene water inlet joint.

4. A simple instrument valve pressure test device for a pressure test pump according to claim 1, characterized in that: The sealing surfaces of the water inlet joint (4) and the polytetrafluoroethylene water outlet joint (8) can be machined and replaced arbitrarily.

5. A simple instrument valve pressure test device for a pressure test pump according to claim 1, characterized in that: The lower pressure test base (2) is welded to the device base (1), and an O-ring seal (3) and a polytetrafluoroethylene water inlet joint (4) are built-in. The water inlet head cover (6), the O-ring seal (3) and the water inlet joint (4) are pressed tightly to form the water inlet side of the device. The upper pressure test base (9), the polytetrafluoroethylene water outlet joint (8), the split ring (10), the valve stem (11) and the water outlet cover (12) form the water outlet side.

6. The pressure test device for a simple instrument valve led out from a pressure test pump according to claim 1, characterized in that: The handwheel (19) rotates the valve stem nut (16) to drive the valve stem (11) to connect the up and down movement of the water outlet side.

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