Rapid pressure test device for center line-type butterfly valve

Abstract

A rapid pressure test device for a center line-type butterfly valve comprises a lower pressing plate, a first test hole is formed in the center of the lower pressing plate, four cylinders are arranged on one side of the lower pressing plate and located on the periphery of the first test hole in the circumferential direction, a cam plate is fixedly arranged at one end of each cylinder, and a long-strip-shaped through hole is formed in each cam plate. One side of the lower pressing plate is provided with an upper pressing plate, the center of the upper pressing plate is provided with a second test hole, the upper pressing plate is fixedly provided with a fixed seat at the periphery of the second test hole, the fixed seat is internally provided with a through hole, the through hole is internally and rotatably provided with a rotating shaft, the other end of the rotating shaft is connected with a radial locking pin, and the locking pin is clamped on the cam surface of the cam plate. The valve body is arranged between the lower pressing plate and the upper pressing plate, the inlet and the outlet of the valve body can be sealed by inserting the rotating shaft and rotating by 90 degrees, then a pressure test is performed, the structure is simple, carrying is convenient, quick mounting or dismounting can be achieved, and the butterfly valve pressure test can be conveniently performed on a pipeline mounting site.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and more particularly to valve testing devices, especially a rapid pressure testing device for a centerline butterfly valve. Background Technology

[0002] Pressure testing devices are frequently used for factory testing and on-site maintenance and inspection of centerline butterfly valves. Currently, these devices are designed and manufactured by specialized companies, are bulky, and complex in structure, involving electrical and hydraulic control systems. Therefore, the equipment is very expensive, and maintenance and operation are relatively complex, making it difficult to perform rapid pressure testing of centerline butterfly valves, especially at pipeline installation sites. Utility Model Content

[0003] The purpose of this invention is to provide a rapid pressure testing device for centerline butterfly valves, which solves the technical problems of complex operation and low testing efficiency of existing butterfly valve pressure testing devices.

[0004] This utility model provides a rapid pressure testing device for a centerline butterfly valve, including a lower pressure plate. A first test hole is provided at the center of the lower pressure plate. Four cylinders are arranged circumferentially around the outer periphery of the first test hole on one side of the lower pressure plate. One end of each cylinder is fixedly connected to the lower pressure plate, and a cam plate is fixedly provided at the other end of each cylinder. The cam plate has an elongated through-hole with a radial cross-section that is elongated. A convex curved surface is provided on the side of the cam plate facing the lower pressure plate. An upper pressure plate is arranged parallel to one side of the lower pressure plate. The upper pressure plate has a second test hole in its center. A fixed seat is fixedly installed on the upper pressure plate around the second test hole. The number and position of the fixed seats correspond one-to-one with the cylinder. Each fixed seat has a through hole, and each fixed seat has a rotating shaft rotatably installed in its through hole. One end of the rotating shaft extends to the outside of the fixed seat and is connected to a handle. The other end of the rotating shaft passes through the elongated through hole of the cam plate and is fixedly connected to a radial locking pin. The locking pin can pass through the elongated through hole and is engaged with the cam surface on the cam plate.

[0005] Furthermore, the elongated through hole includes a circular hole and two rectangular holes, with the two rectangular holes located on both sides of the circular hole.

[0006] Compared with existing technologies, this invention offers significant and positive advantages. By inserting the valve body between the lower and upper pressure plates and rotating it 90° using the rotating shaft, the inlet and outlet of the valve body can be sealed. A pressure test is then conducted. After the pressure test, simply rotating the rotating shaft another 90° releases the butterfly valve, allowing for easy removal. The operation is simple, the structure is straightforward, and it is easy to carry. It replaces the hydraulic cylinder clamping method, enabling rapid installation and disassembly. This allows for convenient butterfly valve pressure testing at the pipeline installation site, greatly improving the efficiency of pressure testing for centerline butterfly valves. Attached Figure Description

[0007] Figure 1 This is a cross-sectional schematic diagram of a rapid pressure testing device for a centerline butterfly valve according to the present invention.

[0008] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0009] Figure 3 This is a three-dimensional schematic diagram of the fixed base, rotating shaft, handle, and locking pin in a rapid pressure testing device for a centerline butterfly valve according to the present invention.

[0010] Figure 4 This is a schematic diagram of a cam plate in a rapid pressure testing device for a centerline butterfly valve according to the present invention.

[0011] Figure 5 This is a front view schematic diagram of the operating state of a rapid pressure testing device for a centerline butterfly valve according to this utility model.

[0012] Figure 6 This is a top view schematic diagram of the operating state of a rapid pressure testing device for a centerline butterfly valve according to this utility model. Detailed Implementation

[0013] The present invention will be further described below with reference to embodiments, but the present invention is not limited to these embodiments. Any similar variations using the present invention should be included within the protection scope of the present invention. The use of directions such as up, down, front, back, left, right, center, inside, and outside in the present invention is only for the convenience of clear description and is not intended to limit the technical solution of the present invention.

[0014] like Figures 1-6As shown, this utility model provides a rapid pressure testing device for a centerline butterfly valve, including a lower pressure plate 1. A first test hole 2 is provided at the center of the lower pressure plate 1. Four cylinders 3 are arranged circumferentially around the outer periphery of the first test hole 2 on one side of the lower pressure plate 1. One end of any cylinder 3 is fixedly connected to the lower pressure plate 1, and a cam plate 4 is fixedly provided at the other end of each cylinder 3. An elongated through hole 5 is provided in the cam plate 4, the radial cross-section of which is elongated. A convex curved surface (not shown in the figure) is provided on the side of the cam plate 4 facing the lower pressure plate 1. An upper pressure plate is arranged parallel to one side of the lower pressure plate 1. 6. A second test hole 7 is provided in the center of the upper pressure plate 6. A fixed seat 8 is fixedly provided on the upper pressure plate 6 around the second test hole 7. The number and position of the fixed seats 8 correspond one-to-one with the cylinder 3. Each fixed seat 8 is provided with a through hole. Each fixed seat 8 has a rotating shaft 9 rotatably installed in the through hole. One end of the rotating shaft 9 extends to the outside of the fixed seat 8 and is connected to a handle 10. The other end of the rotating shaft 9 passes through the elongated through hole 5 of the cam plate 4 and is fixedly connected to a radial locking pin 11. The locking pin 11 can pass through the elongated through hole 5 and is engaged with the cam surface on the cam plate 4.

[0015] Furthermore, the elongated through hole 5 includes a circular hole and two rectangular holes, with the two rectangular holes located on both sides of the circular hole.

[0016] The working principle of this utility model:

[0017] Place the butterfly valve on the upper side of the lower pressure plate 1, with four cylinders 3 surrounding the valve body. Then cover it with the upper pressure plate 6. Insert the four rotating shafts 9 into the elongated through holes 5 of the four cam plates 4 respectively. First, press the upper pressure plate 6 tightly, then use the handle 10 to drive the rotating shafts 9 and locking pins 11 to rotate 90 degrees. This process is from loose to tight, so that the locking pins 11 gradually press the cam plates 4. After rotating to the correct position, the locking pins 11 engage with the highest point of the convex surface, thereby clamping the lower pressure plate 1 and the upper pressure plate 6 with the valve body, sealing the inlet and outlet of the valve body. The first test hole 2 and the second test hole 7 are left to connect to the test water source or compressed air. Then, the butterfly valve's shell test and sealing test can be carried out according to the procedure. After the pressure test is completed, simply rotate the rotating shafts 90 degrees in the opposite direction to quickly loosen the upper pressure plate 6 and remove the butterfly valve.

[0018] The valve body is installed between the lower pressure plate 1 and the upper pressure plate 6. The valve body is sealed by inserting the rotating shaft 9 and rotating it 90°. Then, a pressure test is performed. After the pressure test is completed, the butterfly valve can be released and removed by simply rotating the rotating shaft 9 another 90°. The operation is simple, the structure is simple, and it is easy to carry. It replaces the hydraulic cylinder clamping method and can be quickly installed or disassembled. The butterfly valve pressure test can be conveniently performed at the pipeline installation site, which greatly improves the pressure test efficiency of the centerline butterfly valve.

Claims

1. A rapid pressure testing device for a centerline butterfly valve, characterized in that, The device includes a lower pressure plate with a first test hole at its center. Four cylinders are arranged circumferentially around the first test hole on one side of the lower pressure plate. One end of each cylinder is fixedly connected to the lower pressure plate, and the other end of each cylinder is fixedly fitted with a cam plate. The cam plate has an elongated through-hole with a radial cross-section that is elongated. A convex curved surface is provided on the side of the cam plate facing the lower pressure plate. An upper pressure plate is arranged parallel to the lower pressure plate with a second test hole at its center. Fixed seats are fixedly installed on the upper pressure plate around the second test hole, with the number and position of the fixed seats corresponding to the cylinders. Each fixed seat has a through hole, and each through hole contains a rotating shaft. One end of the rotating shaft extends to the outside of the fixed seat and is connected to a handle. The other end of the rotating shaft passes through the elongated through-hole of the cam plate and is fixedly connected to a radial locking pin. The locking pin can pass through the elongated through-hole and is engaged with the cam surface on the cam plate.

2. A quick pressure testing device for a centerline butterfly valve as defined in claim 1, wherein, The elongated through hole includes a circular hole and two rectangular holes, with the two rectangular holes located on either side of the circular hole.

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