Sliding valve air tightness detection device

Abstract

The utility model discloses a slide valve air tightness detection device, which relates to the technical field of slide valve detection, aims to solve the problem of designing detection equipment for detecting the air tightness of a slide valve by using a bubble method, and comprises a step-shaped detection water tank which comprises a water storage part and a supporting plate, the supporting plate is higher than the water storage part, the supporting plate is provided with a detection port for placing a valve body, the bottom of the detection port is communicated with an air source device, and the detection water tank is provided with a sealing assembly corresponding to the detection port; a drainage assembly is arranged above the water storage part and used for squeezing water in the water storage part to the supporting plate. A water retaining edge is arranged on one side, deviating from the water storage part, of the supporting plate.

Description

Technical Field

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

[0002] A spool valve is a directional control valve widely used in hydraulic and starting systems. Its core operating principle is to change or switch the flow path of a fluid (oil or gas) by sliding the valve core axially within the valve body, thereby controlling the direction, pressure, or flow of the fluid.

[0003] The body of a spool valve is typically a precision-machined metal block or cylinder with precise internal channels and undercut grooves. The valve body features connections to the system, including pressure ports, return ports, and working ports. These ports are used to connect to actuators such as cylinders and motors. Multi-position valves also have transition ports.

[0004] The airtightness of a spool valve is a critical parameter, directly impacting system efficiency (internal leakage leads to energy loss), control accuracy (internal leakage affects speed and position retention), actuator reliability, and system heat generation. Therefore, testing the airtightness of spool valves is crucial.

[0005] Existing testing methods for slide valves include static pressure maintenance, flow measurement, bubble testing, and helium mass spectrometry. The bubble testing method involves immersing the slide to be tested in a transparent test fluid, introducing low-pressure compressed air or nitrogen into the valve's internal passageway, and observing for the presence of continuous bubbles at the seal of a specific gas opening on the valve body. However, specialized testing equipment for the bubble testing process is currently lacking. Utility Model Content

[0006] In order to solve the above problem, that is, to design a detection device for detecting the air tightness of a sliding valve using a bubble method, the utility model proposes a sliding valve air tightness detection device, which includes a stepped detection water tank, wherein the detection water tank includes a water storage portion and a support plate, wherein the support plate is arranged higher than the water storage portion, and a detection port for placing a valve body is provided on the support plate, and the bottom of the detection port is connected to an air source device, and a sealing assembly is installed on the detection water tank corresponding to the detection port; a drainage assembly is provided above the water storage portion for squeezing the water in the water storage portion onto the support plate; and a water retaining edge is provided on the side of the support plate facing away from the water storage portion;

[0007] The sealing assembly includes a sealing cylinder, which is arranged above the valve body and has an output end facing the valve body. The output end of the sealing cylinder is connected to an upper sealing gasket corresponding to the air passage opening at the top of the valve body to seal the air passage opening at the top of the valve body;

[0008] The drainage component includes a drainage cylinder, which is arranged above the water storage part, and an output end of the drainage cylinder is arranged toward the water storage part. A drainage block is connected to the output end of the drainage cylinder.

[0009] The present invention is further configured as follows: a lower sealing gasket is provided at the bottom of the detection port, and an avoidance notch is provided on the lower sealing gasket corresponding to the air path opening at the bottom of the valve body, so as to connect the air source device with the air path opening at the bottom of the valve body.

[0010] The utility model is further configured as follows: the water retaining edge is configured to be higher than the air passage opening at the top of the valve body.

[0011] The utility model is further configured as follows: it also includes a box body, the detection water tank is installed in the box body, the box body is provided with an operation panel, the operation panel is respectively provided with an inflation switch, a drainage switch, a compression switch and an air source switch, the inflation switch is used to control the inflation into the valve body, the drainage switch is used to control the operation of the drainage component, the compression switch is used to control the operation of the sealing component, and the air source switch is used to control the start and stop of the air source device.

[0012] The beneficial effects of the utility model are:

[0013] By utilizing the cooperation of the sealing component and the detection port, the purpose of sealing the air path opening on the valve body can be achieved, and then in conjunction with the inflation of the air source device, a high-pressure atmosphere environment can be formed in the valve body, and then the drainage component is used to squeeze the water in the water storage part onto the support plate, so as to achieve the purpose of immersing the valve body in water, and then the purpose of air tightness detection of the valve body can be completed by observing the bubbles in the water. The sealing component and the detection port can achieve the purpose of quickly sealing the air path opening on the valve body, and after sealing, the valve body is immersed in water by drainage, and there is no need to move the valve body, which further ensures the sealing of the valve body and avoids the problem of loosening of the connection with the air source device due to movement, thereby affecting the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Shown is a structural schematic diagram of the present utility model.

[0015] Figure 2 It shows a schematic diagram of the structure of the box after the side panels are removed.

[0016] Figure 3 Shows a schematic structural diagram of the detection water tank.

[0017] Figure 4 Shown Figure 3 A partial enlarged view of point A in the middle.

[0018] Figure 5Shows a schematic diagram of the structure inside the detection water tank.

[0019] Figure 6 Shown Figure 5 A partial enlarged view of point B in the middle.

[0020] Figure numerals: 1. Detection water tank; 11. Water storage part; 12. Support plate; 121. Detection port; 1211. Lower sealing gasket; 12111. Avoidance port; 122. Water retaining edge; 2. Sealing assembly; 21. Sealing cylinder; 211. Upper sealing gasket; 3. Drainage assembly; 31. Drainage cylinder; 32. Drainage block; 4. Valve body; 5. Box body; 51. Operation panel; 511. Inflation switch; 512. Drainage switch; 513. Compression switch; 514. Air source switch. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] refer to Figure 3 The present invention provides a device for testing the air tightness of a sliding valve, comprising a stepped testing water tank 1, which includes a water reservoir 11 and a support plate 12. The support plate 12 is arranged higher than the water reservoir 11 and forms an inverted stepped arrangement with the water reservoir 11. The support plate 12 is provided with three rectangular testing ports 121 for receiving the valve body 4. The three testing ports 121 are arranged equidistantly. The bottom of the testing ports 121 is connected to an air source device for inflating the valve body 4.

[0023] refer to Figure 4 A sealing assembly 2 is installed on the test water tank 1 corresponding to the test port 121. The sealing assembly 2 is used to compress and seal the valve body 4. A drainage assembly 3 is provided above the water reservoir 11. The drainage assembly 3 can squeeze the water in the water reservoir 11 onto the support plate 12. The support plate 12 is integrally provided with a water retaining edge 122 on the side facing away from the water reservoir 11. The drainage assembly 3 is used to squeeze the water in the water reservoir 11 onto the support plate 12 so that the valve body 4 on the support plate 12 can be immersed in water, thereby achieving the purpose of using the bubble method to test the air tightness of the sliding valve body 4.

[0024] A lower sealing gasket 1211 is placed at the bottom of the detection port 121. The size of the lower sealing gasket 1211 is set to the same size as the bottom of the valve body 4. A avoidance port 12111 is opened on the lower sealing gasket 1211 corresponding to the air path opening at the bottom of the valve body 4. Since there are multiple air path openings at the bottom of the valve body 4, the avoidance port 12111 is an irregular shape to meet the needs of avoiding the air path opening, so that the air source device can be connected to the air path opening at the bottom of the valve body 4, thereby achieving the purpose of inflating the valve body 4 through the air path opening.

[0025] refer to Figure 6 The sealing assembly 2 includes three sealing cylinders 21, each corresponding to a detection port 121. The sealing cylinder 21 is located directly above the detection port 121, and the output end of the sealing cylinder 21 faces the detection port 121. An upper sealing gasket 211 is bolted to the output end of the sealing cylinder 21. The upper sealing gasket 211 is located corresponding to the air passage opening at the top of the valve body 4 to seal the air passage opening at the top of the valve body 4. That is, when the sealing cylinder 21 drives the output end to press the valve body 4 downward, the upper sealing gasket 211 can simultaneously press the air passage opening at the top of the valve body 4.

[0026] refer to Figure 5 The drainage assembly 3 includes a drainage cylinder 31. The drainage cylinder 31 is arranged just above the water storage part 11. The output end of the drainage cylinder 31 is arranged toward the water storage part 11. A drainage block 32 is connected to the output end of the drainage cylinder 31 by bolts. When the drainage cylinder 31 drives the drainage block 32 to move downward, the drainage block 32 presses the water in the water storage part 11 and can squeeze the water in the water storage part 11 upward, thereby making the water in the water storage part 11 able to be squeezed onto the support plate 12, and the liquid level submerges the air passage at the top of the valve body 4, but does not exceed the height of the water retaining edge 122. In this way, the valve body 4 can be immersed in water. In conjunction with the inflation of the air source device, the air tightness of the sliding valve can be detected by the bubble method.

[0027] It should be noted that the height of the water retaining edge 122 needs to be higher than the oil hole setting on the top of the valve body 4, so as to ensure that the air tightness detection points of the valve body 4 can all be immersed in water. At the same time, there needs to be a certain distance between the water retaining edge 122 and the top of the detection water tank 1 to form a window for placing or removing the valve body 4 and facilitating the observation of the detection process.

[0028] refer to Figure 1 、 2, also includes a box body 5, which is welded by a frame and side panels, and the detection water tank 1 is installed in the box body 5. The window of the detection water tank 1 is set on the front surface of the box body 5, and an operation panel 51 is also installed on the front surface of the box body 5. The operation panel 51 is set below the window, and the operation panel 51 is installed with an inflation switch 511, a drainage switch 512, a compression switch 513 and an air source switch 514, wherein the inflation switch 511 is used to control the connection between the air source device and the detection port 121, that is, to control the inflation into the valve body 4. The drainage switch 512 is used to control the drainage component 3, that is, to control the operation of the drainage cylinder 31, so that the drainage cylinder 31 drives the drainage block 32 to move up and down. The compression switch 513 is used to control the operation of the sealing component 2, so that the sealing cylinder 21 drives the upper sealing gasket 211 to compress the air path port at the top of the valve body 4. The air source switch 514 is used to control the start and stop of the air source device.

[0029] During the working process, first, the valve body 4 to be tested is installed into the testing port 121 , and then the pressing switch 513 is pressed to control the sealing cylinder 21 to drive the upper sealing gasket 211 to press the air port at the top of the valve body 4 .

[0030] Then press the air source switch 514 to turn on the air source device, and then press the inflation switch 511 to connect the air source device with the detection port 121 to inflate the valve body 4.

[0031] Finally, press the drain switch 512 to control the drain cylinder 31 to work, drive the drain block 32 to move the cabinet downward, squeeze the water in the water storage part 11 onto the support plate 12, immerse the valve body 4 in the water, and then observe the bubble situation to judge the air tightness of the valve body 4, thereby achieving the purpose of air tightness detection of the sliding valve body 4.

[0032] To sum up, the utility model can achieve the purpose of sealing the air path opening on the valve body 4 by utilizing the cooperation of the sealing component 2 and the detection port 121, and then, in conjunction with the inflation of the air source device, it can form a high-pressure atmosphere environment in the valve body 4, and then utilize the drainage component 3 to squeeze the water in the water storage part 11 onto the support plate 12, so as to achieve the purpose of immersing the valve body 4 in water, and then the purpose of air tightness detection of the valve body 4 can be completed by observing the bubbles in the water, and the sealing component 2 and the detection port 121 can achieve the purpose of quickly sealing the air path opening on the valve body 4, and after sealing, the valve body 4 is immersed in water by drainage, and there is no need to move the valve body 4, which further ensures the sealing of the valve body 4 and avoids the problem of loosening of the connection with the air source device due to movement, thereby affecting the detection accuracy.

[0033] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

[0034] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and are not intended to indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, article, or apparatus / device.

[0037] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A sliding valve air tightness detection device, characterized in that: The invention comprises a stepped detection water tank (1), wherein the detection water tank (1) comprises a water storage portion (11) and a support plate (12), wherein the support plate (12) is arranged higher than the water storage portion (11), and a detection port (121) for placing a valve body (4) is arranged on the support plate (12), and the bottom of the detection port (121) is connected to an air source device, and a sealing component (2) is installed on the detection water tank (1) corresponding to the detection port (121); a drainage component (3) is arranged above the water storage portion (11) for squeezing water in the water storage portion (11) onto the support plate (12); and a water retaining edge (122) is arranged on a side of the support plate (12) away from the water storage portion (11); The sealing assembly (2) includes a sealing cylinder (21), the sealing cylinder (21) is arranged above the valve body (4), and its output end is arranged toward the valve body (4), and the output end of the sealing cylinder (21) is connected to an upper sealing gasket (211) corresponding to the air passage opening at the top of the valve body (4) to seal the air passage opening at the top of the valve body (4); The drainage assembly (3) comprises a drainage cylinder (31), the drainage cylinder (31) is arranged above the water storage portion (11), and its output end is arranged toward the water storage portion (11), and a drainage block (32) is connected to the output end of the drainage cylinder (31).

2. The slide valve air tightness detection device according to claim 1, characterized in that: A lower sealing gasket (1211) is provided at the bottom of the detection port (121), and a relief notch is provided on the lower sealing gasket (1211) corresponding to the air passage opening at the bottom of the valve body (4) for enabling the air source device to communicate with the air passage opening at the bottom of the valve body (4).

3. The slide valve air tightness detection device according to claim 1, characterized in that: The water retaining edge (122) is arranged higher than the air passage opening at the top of the valve body (4).

4. The slide valve air tightness detection device according to claim 1, characterized in that: The invention also includes a box body (5), wherein the detection water tank (1) is installed in the box body (5), and an operation panel (51) is provided on the box body (5). The operation panel (51) is respectively provided with an inflation switch (511), a drainage switch (512), a pressing switch (513) and an air source switch (514). The inflation switch (511) is used to control the inflation into the valve body (4), the drainage switch (512) is used to control the operation of the drainage component (3), the pressing switch (513) is used to control the operation of the sealing component (2), and the air source switch (514) is used to control the start and stop of the air source device.

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