Valve leak detection equipment

Abstract

The utility model discloses a valve leak detection device which comprises a test bench, a test groove is arranged in the upper side surface of the test bench, a clamping device used for pressing a valve is arranged in the test groove, the clamping device comprises two closing plates, the closing plate on the right side is fixed on the right side surface of the test groove, an air cylinder is arranged on the test bench, and the air cylinder is fixed on the right side surface of the test groove. The valve leak detection device is used for performing leak detection work on a valve in a closed state, the valve leak detection device performs leak detection through air pressure, and the valve does not need to be cleaned again after detection is completed; according to the utility model, the valve can be tested after being automatically clamped, and the automation degree is high; a worker can adjust the air pressure supplied to the interior of the valve during leak hunting work by rotating the rotary handle, and the adjusting mode is simple and visual.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve leak detection device. Background Art

[0002] After the valve is produced, leak detection needs to be carried out. At present, the general process of valve leak detection is that the staff connects one end of the valve to an air pump and then immerses it in a water tank. If there is a leakage, small bubbles will emerge on the valve immersed in the water.

[0003] However, the above valve leak detection method has some defects. One is that the valve after detection needs to be additionally dried, which is rather cumbersome. The other is that when the valve is turned over in the water tank, the air originally covered by the valve will escape and form bubbles, which will affect the observation and easily cause misjudgment to the staff. Therefore, improvement is needed. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a valve leak detection device to solve the problems mentioned in the above background art.

[0005] The utility model provides the following technical solutions: A valve leak detection device includes a test bench. A test groove is arranged inside the upper side surface of the test bench. A clamping device for pressing the valve is arranged inside the test groove. The clamping device includes two closing plates. The right closing plate is fixed on the right side surface of the test groove. A cylinder is installed on the test bench. The end of the piston rod extending out of the cylinder is connected to the left closing plate through an installation component.

[0006] It further includes a leak detection mechanism. The leak detection mechanism includes a pressure sensing groove arranged inside the right side surface of the test groove. A pressure sensor is arranged inside the pressure sensing groove. A first ventilation hole that penetrates left and right and communicates with the pressure sensing groove is arranged inside the right closing plate.

[0007] It further includes a gas supply device for supplying gas to the valve clamped by the clamping device.

[0008] Preferably, sealing rings are installed inside the side surfaces of the two closing plates close to each other.

[0009] Preferably, the installation component includes a fixed disk arranged at the end of the piston rod. Taking the axis of the fixed disk as the center, no less than three fixed rods are equiangularly installed on the right side surface of the fixed disk. The ends of the fixed rods are connected to the left closing plate together.

[0010] Preferably, the air supply device includes a piston cylinder, a piston is arranged in the piston cylinder, and a piston rod extending outside the piston cylinder is mounted on the piston. A crank-slider mechanism for driving the piston rod to move left and right is arranged in the test groove. A second ventilation hole penetrating left and right is arranged in the left closing plate, and the air outlet in the piston cylinder is connected to the second ventilation hole through a trachea.

[0011] Preferably, the crank-slider mechanism includes a turntable. A motor for controlling the rotation of the turntable is mounted in the test bench. A convex column is mounted on the front side of the turntable. A connecting rod is rotatably connected to the outside of the convex column, and the end of the connecting rod is hinged to the piston rod.

[0012] Preferably, a sliding groove is arranged in the turntable. A slider is slidably connected in the sliding groove, and the convex column is mounted on the slider. A positioning mechanism for adjusting the position of the slider is arranged in the turntable.

[0013] Preferably, the positioning mechanism includes a threaded shaft rotatably connected in the sliding groove and threadedly connected to the slider. The threaded shaft faces the axis of the turntable, and a rotating handle is mounted at the end of the threaded shaft.

[0014] The utility model provides a valve leak detection device, which has the following beneficial effects:

[0015] The utility model is used for detecting the leakage of a valve in a closed state, and the utility model detects leakage by air pressure. After the detection is completed, the valve does not need to be cleaned again;

[0016] The utility model can automatically clamp and test the valve, and has a high degree of automation;

[0017] The staff can adjust the air pressure supplied to the valve during the leak detection work by rotating the rotating handle. The adjustment method is simple and intuitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the external view schematic diagram of the utility model;

[0019] Figure 2 is the top view schematic diagram of the utility model;

[0020] Figure 3 is Figure 1 the enlarged schematic diagram of the turntable in

[0021] In the figure:

[0022] 11. Test bench; 12. Test slot; 13. Enclosure plate; 14. Cylinder; 15. Pressure sensing slot; 16. Fixed disk; 21. Piston cylinder; 22. Air pipe; 31. Turntable; 32. Motor; 33. Convex post; 34. Connecting rod; 35. Slide groove; 36. Slide block; 37. Threaded shaft. Detailed implementation manner

[0023] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0026] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Refer to Figures 1 - 3 , according to an embodiment of a valve leak detection device of the present utility model, including

[0028] A valve leak detection device includes a test bench 11. A test slot 12 is provided inside the upper side of the test bench 11, and a valve can be placed in the test slot 12 for airtightness testing with the valve closed.

[0029] A clamping device for pressing the valve is provided in the test slot 12. The clamping device includes two closing plates 13. The right closing plate 13 is fixed to the right side surface of the test slot 12. A cylinder 14 is installed on the test bench 11. The end of the piston rod extending out of the cylinder 14 is connected to the left closing plate 13 through an installation assembly.

[0030] It further includes a leak detection mechanism. The leak detection mechanism includes a pressure sensing groove 15 provided in the right side surface of the test slot 12. A pressure sensor is provided in the pressure sensing groove 15. A first ventilation hole that penetrates left and right and communicates with the pressure sensing groove 15 is provided in the right closing plate 13.

[0031] It further includes a gas supply device for supplying gas to the valve clamped by the clamping device.

[0032] Specifically, after the valve is placed in the test slot 12 and its position is locked left and right by the two closing plates 13, the gas supply mechanism supplies gas into the valve. If the valve leaks, the air flow will enter the pressure sensing groove 15 through the first ventilation hole and be sensed by the pressure sensor. At this time, the alarm device in the test bench 11 will give an alarm. In this embodiment, the alarm device is a buzzer.

[0033] In order to achieve sealing and prevent air from escaping between the closing plate 13 and the flange in the valve, sealing rings 41 are installed on the side surfaces of the two closing plates 13 that are close to each other.

[0034] In this embodiment, the installation assembly includes a fixed disk 16 provided at the end of the piston rod. Taking the axis of the fixed disk 16 as the center, no less than three fixed rods are equiangularly installed on the right side surface of the fixed disk 16. The ends of the fixed rods are connected together to the left closing plate 13.

[0035] The gas supply device includes a piston cylinder 21. A piston is provided in the piston cylinder 21. A piston rod extending outside the piston cylinder 21 is installed on the piston. A crank-slider mechanism for driving the piston rod to move left and right is provided in the test slot 12. A second ventilation hole that penetrates left and right is provided in the left closing plate 13. The air outlet in the piston cylinder 21 is connected to the second ventilation hole through a trachea 22.

[0036] The crank-slider mechanism includes a turntable 31. A motor 32 for controlling the rotation of the turntable 31 is installed in the test bench 11. A convex column 33 is installed on the front side surface of the turntable 31. A connecting rod 34 is rotatably connected to the outside of the convex column 33. The end of the connecting rod 34 is hinged to the piston rod.

[0037] When the motor 32 is energized, it will drive the turntable 31 to rotate, and then through the connecting rod 34, the piston rod will move left and right. When the piston rod originally at the leftmost side moves to the rightmost side, the air pressed into the valve reaches the maximum, and the air pressure in the valve reaches the maximum. At this time, its sealing performance can be tested.

[0038] In the second embodiment of the valve leak detection device, in order to make the maximum test air pressure adjustable, a chute 35 is provided in the turntable 31. A slider 36 is slidably connected in the chute 35, and the convex column 33 is mounted on the slider 36. And a positioning mechanism for adjusting the position of the slider 36 is provided in the turntable 31. In this embodiment, the positioning mechanism includes a threaded shaft 37 rotatably connected in the chute 35 and threadedly connected to the slider 36. The threaded shaft 37 faces the axis of the turntable 31, and a knob is mounted at the end of the threaded shaft 37.

[0039] That is, the farther the slider 36 is from the axis of the turntable 31, the greater the stroke of the turntable 31 rotating half a week and the convex column 33 and the piston moving from the leftmost to the rightmost. When testing the valve, the greater the air pressure applied to the valve. The staff can control the air pressure during the seal test of the valve by turning the knob.

[0040] Specific test process:

[0041] First, the staff adjusts the positions of the slider 36 and the convex column 33 according to the valve size. Then, when testing is to be carried out, the staff places the valve in the test slot 12, and the air cylinder 14 controls the fixed disk 16 and the left closing plate 13 to move to the right until the valve is clamped between the two closing plates 13. Then the motor 32 controls the turntable 31 to rotate half a week. At this time, the piston moves from the leftmost side to the rightmost side, and the air in the piston cylinder 21 will be injected into the valve clamped by the closing plate 13 through the air pipe 22. If the airtightness of the valve is poor in the closed state, the pressure sensor in the pressure sensing groove 15 will cause the alarm device to alarm.

[0042] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A valve leak detection device, comprising a test bench (11), characterized in that: A test slot (12) is provided in the upper side of the test bench (11), a clamping device for clamping the valve is provided in the test slot (12), the clamping device comprises two closing plates (13), the closing plate (13) on the right side is fixed to the right side surface of the test slot (12), a cylinder (14) is installed on the test bench (11), and the end of the piston rod extending out of the cylinder (14) is connected to the closing plate (13) on the left side through a mounting assembly; It also includes a leak detection mechanism, the leak detection mechanism including a pressure sensing groove (15) arranged in the right side of the test groove (12), a pressure sensor is arranged in the pressure sensing groove (15), and a first vent hole is arranged in the right side closing plate (13) and is connected to the pressure sensing groove (15); Also included is an air supply device for supplying air to the valve clamped by the clamping device.

2. A valve leakage detection device according to claim 1, characterized in that: A sealing ring (41) is installed in the side surfaces of the two closing plates (13) that are close to each other.

3. A valve leakage detection device according to claim 1, characterized in that: The mounting assembly comprises a fixing plate (16) arranged at the end of the piston rod, with the axis of the fixing plate (16) as the center, and at least three fixing rods are installed at equal angles on the right side surface of the fixing plate (16), and the ends of the fixing rods are connected together to the closing plate (13) located on the left side.

4. A valve leakage detection device according to claim 1, characterized in that: The air supply device comprises a piston cylinder (21), a piston is arranged in the piston cylinder (21), and a piston rod is mounted on the piston and extends outside the piston cylinder (21); a crank slider mechanism is arranged in the test slot (12) for driving the piston rod to move left and right; a second air vent hole is arranged in the left closing plate (13) and passes through the left and right sides; and an air outlet in the piston cylinder (21) is connected to the second air vent hole through an air pipe (22).

5. A valve leakage detection device according to claim 4, characterized in that: The crank slider mechanism comprises a turntable (31), a motor (32) for controlling the rotation of the turntable (31) is installed in the test bench (11), a boss (33) is installed on the front side of the turntable (31), a connecting rod (34) is rotatably connected to the outside of the boss (33), and the end of the connecting rod (34) is hinged to the piston rod.

6. A valve leakage detection device according to claim 5, characterized in that: A slide groove (35) is provided in the rotating disk (31), a slider (36) is slidably connected in the slide groove (35), the boss (33) is mounted on the slider (36), and a positioning mechanism for adjusting the position of the slider (36) is provided in the rotating disk (31).

7. A valve leakage detection device according to claim 6, characterized in that: The positioning mechanism comprises a threaded shaft (37) rotatably connected in the slide groove (35) and threadedly connected to the slider (36), the threaded shaft (37) facing the axis of the rotating disk (31), and a rotary handle is provided at the end of the threaded shaft (37).

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