Pressure testing device for valve plate of center line-type butterfly valve

Abstract

The utility model provides a pressure test device of a center line-type butterfly valve plate, an upper sealing member and a lower sealing member are respectively arranged at two ends of a workpiece to be tested, an air inlet pipe is inserted in the workpiece to be tested, one end of the air inlet pipe is provided with an air tap, the other end of the air inlet pipe is connected to a closing power, and the periphery of the air inlet pipe can be clamped to one end of the lower sealing member. One end of the closing power part can be clamped to one end of the upper sealing part, a cavity is formed in the workpiece to be detected, the air nozzle is externally connected to external air injection equipment, an air inlet hole is formed in the air inlet pipe, and the external air injection equipment can fill a pressure medium into the cavity through the air inlet hole. According to the pressure test device for the valve plate of the center line-type butterfly valve, the external gas injection equipment can fill a pressure medium into the cavity through the gas inlet hole, the two ends of the workpiece to be tested can be tensioned and pressed through closing power, the closing power is a linear cylinder, the two ends of the valve plate can be blocked through one closing power, the number of participating parts is small, and the cost is low. Operation is convenient, and the pressure testing cost is low.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the valve plate production field especially, it is a kind of pressure testing device of midline butterfly valve valve plate. BACKGROUND

[0002] The butterfly valve is also called flap valve, it is a kind of simple structure regulating valve, it can be used for low pressure pipeline medium switch control butterfly valve, it is the disc that the closing piece (valve lobe or butterfly plate) is, it rotates around the valve shaft to reach the opening and closing of a kind of valve, valve can be used to control air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive medium and the flow of various types fluid.In pipeline, mainly play the role of cut-off and throttling.Butterfly valve opening and closing element is a disc-shaped butterfly plate, rotates in the valve body around its own axis, to achieve the purpose of opening and closing or adjusting, the disc plate of prior art is usually formed by pouring, after forming, air hole or hidden crack will be formed in the disc plate, and the disc plate needs to be pressure tested. SUMMARY

[0003] Therefore, the utility model aims at providing a kind of pressure testing device of midline butterfly valve valve plate to solve the problem of complex test operation and high equipment cost when the valve plate is tested in prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A kind of pressure testing device of midline butterfly valve valve plate, including closing power, upper seal, air inlet pipe, lower seal and gas nozzle, upper seal and lower seal are respectively arranged at the two ends of the workpiece to be measured, air inlet pipe is inserted into the workpiece to be measured, one end of air inlet pipe is installed gas nozzle, the other end of air inlet pipe is connected to closing power, and the periphery of air inlet pipe can be clamped to one end of lower seal, one end of closing power can be clamped to one end of upper seal, cavity is provided in the workpiece to be measured, gas nozzle is connected to external gas injection equipment, and air inlet hole is provided on air inlet pipe, and external gas injection equipment can fill pressure medium into cavity through air inlet hole.

[0006] Further, the closing power is a linear cylinder or a linear motor.

[0007] Further, a first sealing ring is arranged between the upper seal and the workpiece to be measured.

[0008] Further, a second sealing ring is arranged between the lower seal and the workpiece to be measured.

[0009] Further, the periphery of the air inlet pipe is screw-connected with an adjusting nut, one end of the adjusting nut can abut to one end of the lower seal.

[0010] Further, a clamping pad is arranged between the adjusting nut and the lower seal, and an opening is provided on the clamping pad, and the periphery of the air inlet pipe is located in the opening.

[0011] Further, a third sealing ring is arranged between the gasket and the lower sealing element.

[0012] Further, the movable end of the closing power is threadedly connected to one end of the air inlet pipe, and one end of the air nozzle is threadedly connected to the other end of the air inlet pipe.

[0013] Compared with the prior art, the pressure testing device for the valve plate of the centerline butterfly valve has the following beneficial effects:

[0014] (1) The pressure testing device for the valve plate of the centerline butterfly valve has the following beneficial effects:

[0015] (2) The pressure testing device for the valve plate of the centerline butterfly valve has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and are incorporated herein for explanation by way of the non-limiting embodiments of the present application. In the drawings:

[0017] Figure 1 FIG. 1 is a structural schematic view of a pressure testing device for a valve plate of a centerline butterfly valve according to an embodiment of the present application;

[0018] Figure 2 FIG. 1 is a structural schematic view of a pressure testing device for a valve plate of a centerline butterfly valve according to an embodiment of the present application;

[0019] Figure 3 FIG. 1 is a structural schematic view of a pressure testing device for a valve plate of a centerline butterfly valve according to an embodiment of the present application;

[0020] Figure 4 FIG. 1 is a structural schematic view of a pressure testing device for a valve plate of a centerline butterfly valve according to an embodiment of the present application;

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 1-closing power; 2-upper sealing element; 3-air inlet pipe; 31-air inlet hole; 4-lower sealing element; 5-air nozzle; 6-workpiece to be tested; 7-adjusting nut; 8-gasket. DETAILED DESCRIPTION

[0023] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other in the case of no conflict.

[0024] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0025] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0026] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0027] As Figures 1-4As shown, a kind of test pressure device of center line butterfly valve valve plate, including closed power 1, upper seal 2, air inlet pipe 3, lower seal 4 and gas nozzle 5, upper seal 2 and lower seal 4 are respectively arranged at the two ends of the workpiece 6 to be measured, air inlet pipe 3 is inserted into the workpiece 6 to be measured, one end of air inlet pipe 3 is installed gas nozzle 5, the other end of air inlet pipe 3 is connected to closed power 1, and the periphery of air inlet pipe 3 can be clamped to one end of lower seal 4, one end of closed power 1 can be clamped to one end of upper seal 2, cavity is provided in the workpiece 6 to be measured, gas nozzle 5 is connected to external gas injection equipment, and air inlet hole 31 is provided on air inlet pipe 3, and external gas injection equipment can fill pressure medium into cavity through air inlet hole 31, and closed power 1 can be tensioned and pressed on the two ends of the workpiece 6 to be measured, and the workpiece 6 to be measured of the embodiment is the valve plate of butterfly valve, and the closed power 1 is linear cylinder or linear motor, the closed power 1 of the embodiment is linear cylinder, one closed power 1 can block the two ends of valve plate, the number of participating components is less, and the test pressure cost is low.

[0028] First sealing ring is arranged between upper seal 2 and the workpiece 6 to be measured, second sealing ring is arranged between lower seal 4 and the workpiece 6 to be measured, and first sealing ring and second sealing ring are respectively used to ensure the sealing of this part, to ensure that the pressure is filled, and the pressure is stable.

[0029] The periphery of air inlet pipe 3 is screw-connected with adjusting nut 7, one end of adjusting nut 7 can abut to one end of lower seal 4, the initial relative position of air inlet pipe 3 and lower seal 4 can be locked by adjusting nut 7, and clamping pad 8 is arranged between adjusting nut 7 and lower seal 4, and opening is provided on clamping pad 8, the periphery of air inlet pipe 3 is located in the opening, to facilitate disassembly of this part, third sealing ring is arranged between clamping pad 8 and lower seal 4, to ensure the sealing of this part.

[0030] In implementation, the movable end of closed power 1 is screw-connected to one end of air inlet pipe 3, to connect the relative position of movable end of closed power 1 and air inlet pipe 3, and one end of gas nozzle 5 is screw-connected to the other end of air inlet pipe 3.

[0031] The above only describes preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pressure testing device for a centerline butterfly valve plate, characterized in that: It comprises a closing power (1), an upper sealing piece (2), an air inlet pipe (3), a lower sealing piece (4) and an air nozzle (5), the upper sealing piece (2) and the lower sealing piece (4) are arranged at two ends of a workpiece (6) to be tested respectively, the air inlet pipe (3) is inserted into the workpiece (6) to be tested, one end of the air inlet pipe (3) is provided with the air nozzle (5), the other end of the air inlet pipe (3) is connected to the closing power (1), the periphery of the air inlet pipe (3) can be clamped to one end of the lower sealing piece (4), one end of the closing power (1) can be clamped to one end of the upper sealing piece (2), the workpiece (6) to be tested is provided with a cavity, the air nozzle (5) is connected to an external gas injection device, the air inlet pipe (3) is provided with an air inlet hole (31), and the external gas injection device can fill the cavity with pressure medium through the air inlet hole (31).

2. A pressure testing device for a centerline butterfly valve disc according to claim 1, wherein: The closing power (1) is a linear cylinder or a linear motor.

3. The pressure testing device for a centerline butterfly valve disc of claim 1, wherein: A first sealing ring is arranged between the upper sealing piece (2) and the workpiece (6) to be tested.

4. The pressure testing device for a centerline butterfly valve disc of claim 1, wherein: A second sealing ring is arranged between the lower sealing piece (4) and the workpiece (6) to be tested.

5. The pressure testing device for a centerline butterfly valve disc of claim 1, wherein: The periphery of the air inlet pipe (3) is screw-connected to an adjusting nut (7), one end of the adjusting nut (7) can abut to one end of the lower sealing piece (4).

6. A pressure testing device for a centerline butterfly valve disc according to claim 5, wherein: A clamping pad (8) is arranged between the adjusting nut (7) and the lower sealing piece (4), and the clamping pad (8) is provided with an opening, and the periphery of the air inlet pipe (3) is located in the opening.

7. A pressure testing device for a centerline butterfly valve disc according to claim 6, wherein: A third sealing ring is arranged between the clamping pad (8) and the lower sealing piece (4).

8. The pressure testing device for a centerline butterfly valve disc of claim 1, wherein: The movable end of the closing power (1) is screw-connected to one end of the air inlet pipe (3), and one end of the air nozzle (5) is screw-connected to the other end of the air inlet pipe (3).

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