Filter fuming testing device

Abstract

The utility model discloses a fuming test device for a filter. A base is provided with a fuming cavity and a bearing top surface; a smoke outlet communicated with the smoke generating cavity is formed in the bearing top surface; the fuming device is arranged in the fuming cavity; the air outlet end of the air feeder is communicated with the fuming cavity; limiting partition plates are arranged on the bearing top face and located on the left side and the right side of the smoke outlet. An exhaust cavity is formed in the limiting partition plate; a plurality of ventilation holes communicated with the exhaust cavity are formed in the opposite surfaces of the limiting partition plates; the first end of the three-way electromagnetic valve communicates with the exhaust cavities of the limiting partition plates on the two sides, the second end communicates with the smoke generation cavity, and the third end communicates with the air inlet end of the exhaust fan. The light source assembly is arranged above the base and provided with a light emitting end facing the base. According to the smoke test device, smoke escaping from the environment can be continuously sucked in the test process, smoke generated in the test process can be sucked, the smoke is discharged in time, the smoke is effectively prevented from escaping to the outside, the smoke test requirement of the filter is effectively met, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a filter smoke testing device. Background Art

[0002] Air filters require leak testing during production, often performed using a smoke test. Specifically, a smoke generator is used to generate smoke on the air inlet side of the filter. A light source is then illuminated on the air outlet side of the filter to observe the smoke. If a leak is detected, smoke will be clearly visible at the location. After the test is complete, the smoke is collected and discharged by suction. During or after the test, some smoke can escape, and untimely smoke discharge can affect the work environment and workers' health. Furthermore, during the smoke test, the light source cannot be adjusted relative to the filter. When testing filters at higher heights, the fixed light source cannot illuminate the entire filter surface, making it difficult to detect local leaks and thus miss detections. When testing filters at lower heights, the light from the light source diffuses across the filter surface, resulting in poor brightness and obscured leaks, making accurate observation difficult and similarly prone to missed detections. Utility Model Content

[0003] In response to the above-mentioned technical problems, the purpose of the utility model is to propose a filter smoke testing device that can continuously inhale the smoke emitted from the environment during the test, as well as the smoke generated during the test. The smoke is discharged in a timely manner, effectively preventing the smoke from escaping to the outside, effectively meeting the smoke testing needs of the filter, and has strong practicality.

[0004] The technical solution of the utility model is achieved as follows: a filter smoke test device, including a base, a three-way solenoid valve, an exhaust fan, a blower, a smoke device, and a light source assembly;

[0005] The base has a smoke chamber and a bearing top surface; the bearing top surface is provided with a smoke outlet connected to the smoke chamber; the smoke generating device is arranged in the smoke chamber; the air outlet end of the blower is connected to the smoke chamber;

[0006] The supporting top surface is provided with a limit partition on the left and right sides of the smoke outlet; an exhaust cavity is provided inside the limit partition; and a plurality of ventilation holes communicating with the exhaust cavity are provided on the opposite surface of the limit partition;

[0007] The first end of the three-way solenoid valve is communicated with the exhaust chambers of the limiting partitions on both sides, the second end is communicated with the smoke chamber, and the third end is communicated with the air inlet end of the exhaust fan.

[0008] The light source assembly is arranged above the base and has a light emitting end facing the base.

[0009] Furthermore, an inlet and outlet hole is provided on at least one of the left and right sides of the smoke outlet on the supporting top surface; the inlet and outlet hole is communicated with the smoke chamber;

[0010] The smoke test device includes an opening and closing assembly; the opening and closing assembly is disposed in the smoke chamber and includes a cover plate and a spring; the front end or the rear end of the cover plate is hinged to the base, and has a first position for closing the smoke outlet and a second position for moving downward away from the first position and opening the smoke outlet; the spring is disposed between the cover plate and the base and has an elastic force for driving the cover plate toward the first position;

[0011] A pressing block is provided on the cover plate corresponding to the inlet and outlet holes; the pressing block is movably arranged in the inlet and outlet holes; in the first position, the pressing block is exposed above the top surface of the bearing;

[0012] The filter has a test position on the load-bearing top surface between the limiting partitions on both sides; in the test position, the profile frame of the filter covers the inlet and outlet holes.

[0013] Furthermore, a slope is provided on the top surface of the pressure block; the slope has an inclined lower end extending toward the front side of the base and an inclined upper end extending toward the rear side of the base; in the first position, the inclined lower end of the slope is lower than the bearing top surface, and the inclined upper end of the slope is higher than the bearing top surface.

[0014] Furthermore, the light source assembly includes a bracket and a light-emitting unit arranged on the bracket; the bracket is arranged on the base and the upper and lower heights are adjustable.

[0015] Furthermore, one of the base and the bracket has a plurality of first sockets spaced apart at upper and lower edges, and the other has a plurality of second sockets spaced apart at upper and lower edges; the first sockets and the second sockets at corresponding positions are fastened and locked by bolt assemblies.

[0016] Furthermore, a stop plate is provided on the supporting top surface at the rear side of the smoke outlet; and a position sensor for detecting the position of the filter is provided on the stop plate.

[0017] Furthermore, the smoke generating device is an aerosol generator for generating PAO smoke.

[0018] Furthermore, the three-way solenoid valve has at least a first state and a second state; in the first state, the exhaust fan is connected to the exhaust chamber through the three-way solenoid valve; in the second state, the exhaust fan is connected to the smoke chamber through the three-way solenoid valve.

[0019] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0020] 1. The utility model uses a limiting partition in conjunction with the filter, so that the filter can be placed between the limiting partitions on both sides to be limited. An exhaust cavity and ventilation holes are processed inside the limiting partition. Through the use of a three-way solenoid valve and an exhaust fan, smoke escaping from the environment can be continuously sucked out through the exhaust cavity and ventilation holes during the test, and smoke generated in the smoke chamber can be sucked out by switching the three-way solenoid valve. The combination of the above methods allows smoke to be discharged in a timely manner, effectively preventing smoke from escaping to the outside, maintaining a healthy and safe working environment, and effectively meeting the smoke test requirements of the filter, with strong practicality.

[0021] 2. The utility model uses the opening and closing components in conjunction with each other. When the filter moves to the test position, the filter presses down on the pressing block to drive the cover plate to move downward and open the smoke outlet. The smoke generated in the smoke chamber can be discharged from the smoke outlet for testing. At the same time, the filter profile frame closes the inlet and outlet holes to prevent smoke from escaping from the inlet and outlet holes. When the filter leaves the test position, the cover plate can automatically reset to close the smoke outlet to prevent the smoke in the smoke chamber from being discharged through the smoke outlet. The combination of the above methods can effectively prevent smoke from escaping, facilitates continuous filter testing operations, and is highly practical.

[0022] 3. In the present invention, the upper and lower heights of the bracket are adjusted to adjust the upper and lower positions of the light-emitting unit relative to the filter, so that filters of different heights can be adapted. The light emitted by the light source diffuses evenly on the surface of the filter with excellent brightness, so that the leakage points on the filter can be accurately observed, effectively meeting the testing requirements of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The technical solution of the utility model is further described below with reference to the accompanying drawings:

[0024] Figure 1 It is a three-dimensional structural diagram of the overall structure of the utility model;

[0025] Figure 2 for Figure 1 A magnified view of point A in the figure;

[0026] Figure 3 for Figure 2 A side view structural diagram of ;

[0027] Figure 4 for Figure 1 A schematic diagram of a three-dimensional structure from another perspective;

[0028] Figure 5 This is a schematic structural diagram of the filter of the present invention in a test position;

[0029] Figure 6 for Figure 5 A cross-sectional structural diagram of ;

[0030] Figure 7 This is a schematic diagram of the three-dimensional structure of the cover plate of the present invention;

[0031] Figure 8 This is a schematic diagram of the three-dimensional structure of the light source assembly of the present utility model;

[0032] Among them: 1. Base; 11. Smoke chamber; 12. Load-bearing top surface; 13. Smoke outlet; 14. Inlet and outlet holes; 15. First plug hole; 2. Limiting partition; 21. Exhaust chamber; 22. Ventilation hole; 3. Smoke generating device; 31. Air blower; 4. Connecting pipe; 5. Three-way solenoid valve; 51. Exhaust fan; 6. Cover; 61. Spring; 62. Pressure block; 621. Inclined surface; 7. Light source assembly; 71. Bracket; 711. Second plug hole; 72. Light-emitting unit; 8. Filter. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0034] like Figure 1-8 The figure shows a filter smoke test device described in this embodiment, which is used for testing air filters. The filter 8 is preferably a square filter, which is composed of a profile frame and a filter element placed in the profile frame. The smoke test device includes a base 1, a three-way solenoid valve 5, an exhaust fan 51, a blower 31, a smoke device 3, and a light source assembly 7. A smoke chamber 11 is formed inside the base 1. The top surface of the base 1 is a bearing top surface 12, so as to be able to bear the filter 8. A smoke outlet 13 connected to the smoke chamber 11 is processed on the bearing top surface 12. The aforementioned smoke device 3 is installed in the smoke chamber 11 so as to be able to generate smoke in the smoke chamber 11. The smoke device 3 is a conventional device in the prior art, which is an aerosol generator for generating PAO (polyalphaolefin) smoke. The aforementioned blower 31 is installed below the base 1 , and the air outlet end of the blower 31 is connected to the smoke chamber 11 . Air flow is introduced into the smoke chamber 11 through the blower 31 to transport the smoke in the smoke chamber 11 to the smoke outlet 13 .

[0035] The above-mentioned bearing top surface 12 is provided with a limiting partition 2 on the left and right sides of the smoke outlet 13. The limiting partition 2 extends in the front-to-back direction of the smoke and is fixedly connected to the base 1. A storage space for arranging the filter 8 is formed between the limiting partitions 2 on both sides. The filter 8 enters and exits the storage space from the front side of the base 1 to have a test position on the bearing top surface 12 between the limiting partitions 2 on both sides. In this test position, the bottom surface of the filter 8 covers the top of the smoke outlet 13. The limiting partition 2 is formed by processing a plate, and an exhaust cavity 21 is formed inside the plate. A plurality of ventilation holes 22 connected to the exhaust cavity 21 are processed on the opposite surface of the limiting partition 2. The above-mentioned ventilation holes 22 are strip-shaped holes, which are arranged at intervals along the front-to-back direction. Among them, a concave surface is processed on the opposite surface of the limiting partition 2, and the above-mentioned ventilation holes 22 are arranged on the concave surface. When the filter 8 is placed between the limiting partitions 2 on both sides, a gap is formed between the ventilation holes 22 and the side of the filter 8 for air flow to move, preventing the side of the filter 8 from covering the ventilation holes 22. The first end of the aforementioned three-way solenoid valve 5 is connected to the exhaust chamber 21 of the limiting partitions 2 on both sides, the second end is connected to the smoke chamber 11, and the third end is connected to the air inlet end of the exhaust fan 51. By controlling the operation of the three-way solenoid valve 5, the three-way solenoid valve 5 is set to a first state, a second state, and a third state. In the first state, the exhaust fan 51 is connected to the exhaust chamber 21 alone through the three-way solenoid valve 5. In the second state, the exhaust fan 51 is connected to the smoke chamber 11 alone through the three-way solenoid valve 5. In the third state, the exhaust fan 51 is connected to the smoke chamber 11 and the exhaust chamber 21 through the three-way solenoid valve 5. With the above structural design, when the exhaust fan 51 is in operation, the three-way solenoid valve 5 is controlled and switched to guide the outside air flow into the exhaust chamber 21 through the vent hole 22 and be discharged through the exhaust fan 51. The smoke in the smoke chamber 11 can also be discharged.

[0036] The aforementioned light source assembly 7 is installed above the base 1 and has a light-emitting end facing the base 1. The light source assembly 7 emits light so as to illuminate the top surface of the filter 8. In this embodiment, the light source assembly 7 includes a bracket 71 and a light-emitting unit 72. The light-emitting unit 72 is fixedly mounted on the bracket 71, and the light-emitting unit 72 is composed of a plurality of groups of lamp tubes. The bracket 71 is mounted on the base 1 and is adjustable in height up and down. By adjusting the height of the bracket 71, the height of the light-emitting unit 72 relative to the base 1 can be adjusted. Specifically, a sleeve is fixed correspondingly on the base 1. The bracket 71 is inserted into the sleeve up and down. On one of the sleeve and the bracket 71, a plurality of first sockets 15 are processed at intervals at upper and lower edges, and a plurality of second sockets 711 are processed at intervals at upper and lower edges on the other. By aligning the first sockets 15 with the second sockets 711 at different positions, the upper and lower position adjustment of the bracket 71 can be achieved. The first insertion hole 15 and the second insertion hole 711 at corresponding positions are inserted and locked together by a bolt assembly so as to fix the bracket 71 on the sleeve.

[0037] The smoke test device of this embodiment includes an opening and closing component, by which the smoke outlet 13 can be opened or closed, thereby preventing the smoke in the smoke chamber 11 from escaping. Specifically, an inlet and outlet hole 14 is processed on one or both sides of the left and right sides of the smoke outlet 13 on the bearing top surface 12. The inlet and outlet hole 14 is connected to the smoke chamber 11. The inlet and outlet hole 14 is adapted to the left and right frame edges of the profile frame of the filter 8. When the filter 8 is located in the aforementioned test position, the profile frame of the filter 8 covers the inlet and outlet hole 14. The aforementioned opening and closing component is installed in the smoke chamber 11, and includes a cover plate 6 and a spring 61. The front end or the rear end of the cover plate 6 is hinged to the base 1 so as to be able to rotate up and down relative to the base 1, so as to have a first position for closing the smoke outlet 13 and a second position for moving downward away from the first position and opening the smoke outlet 13. The aforementioned spring 61 is connected between the cover plate 6 and the base 1. The spring 61 provides an elastic force to drive the cover plate 6 to move toward the first position, thereby realizing that the cover plate 6 automatically closes the smoke outlet 13. A pressure block 62 is processed on the cover plate 6 corresponding to the inlet and outlet holes 14. The pressure block 62 is accommodated in the inlet and outlet holes 14 and can move up and down. When the cover plate 6 is in the aforementioned first position, the pressure block 62 is exposed above the load-bearing top surface 12. Through the above-mentioned structural design, when the filter 8 is in the test position, the profile frame of the filter 8 abuts against the pressure block 62 and presses down the pressure block 62, thereby driving the cover plate 6 to move from the first position to the second position, and then opening the smoke outlet 13.

[0038] In this embodiment, the filter 8 moves to the test position by sliding back and forth on the bearing top surface 12. In order to match the movement of the filter 8, a slope 621 is processed on the top surface of the pressure block 62. The slope 621 has an inclined lower end extending toward the front side of the base 1 and an inclined upper end extending toward the rear side of the base 1. In the aforementioned first position, the inclined lower end of the slope 621 is lower than the bearing top surface 12, and the inclined upper end of the slope 621 is higher than the bearing top surface 12. Through the above-mentioned structural design, when the filter 8 moves from the front side of the base 1 to the rear side on the bearing top surface 12 to the test position, the profile frame of the filter 8 first contacts the slope 621 to press the pressure block 62 to move downward, thereby driving the cover plate 6 to move downward and opening the smoke outlet 13.

[0039] In this embodiment, the blower 31, smoke generator 3, exhaust fan 51, and three-way solenoid valve 5 are connected to a controller to implement control operations. A stop plate is located behind the smoke outlet 13 on the support top surface 12. This stop plate prevents the filter 8 from moving toward the rear of the base 1, thereby retaining the filter 8 in the test position. A position sensor for detecting the position of the filter 8 is mounted on the stop plate. This position sensor is a conventional contact sensor. The position sensor is connected to the controller. When the filter 8 is in the test position, the position sensor is triggered and outputs a signal, which controls the operation of the smoke generator 3 and blower 31 through the controller.

[0040] During use, the filter 8 is placed on the top support surface 12 and pushed toward the rear of the base 1 to the test position between the two limiting partitions 2. During this process, the profile frame of the filter 8 contacts the pressure block 62, forcing it downward, thereby rotating the cover 6 downward and opening the smoke outlet 13. The smoke generating device 3 generates smoke in the smoke generating chamber 11, and the blower 31 delivers air into the smoke generating chamber 11 to concentrate the smoke toward the smoke outlet 13. The three-way solenoid valve 5 is switched to the first state and the exhaust fan 51 is activated. Air around the filter 8 flows through the vents 22 into the exhaust chamber 21 and is then exhausted centrally by the exhaust fan 51. The bracket 71 is adjusted up and down to adjust the light unit 72 to the appropriate position. The light emitted by the light unit 72 is then directed onto the air outlet surface of the filter 8 to observe the location of any leaks in the filter 8. After the test is complete, the filter 8 is removed, and the cover 6 automatically closes the smoke outlet 13. After a certain number of filters 8 have been tested, the three-way solenoid valve 5 is switched to the second state and the exhaust fan 51 is activated to exhaust the smoke in the smoke chamber 11. This method allows smoke escaping from the environment to be continuously drawn through the exhaust chamber 21 and the ventilation holes 22 during the test, and allows smoke generated in the smoke chamber 11 to be drawn by switching the three-way solenoid valve 5. This allows for timely smoke discharge, effectively preventing smoke from escaping to the outside world, maintaining a healthy and safe working environment, and effectively meeting the requirements of smoke testing of filters 8, resulting in a highly practical system.

[0041] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A filter smoke test device, comprising a base, a three-way solenoid valve, an exhaust fan, a blower, a smoke generator, and a light source assembly; characterized in that: The base has a smoke chamber and a bearing top surface; the bearing top surface is provided with a smoke outlet connected to the smoke chamber; the smoke generating device is arranged in the smoke chamber; the air outlet end of the blower is connected to the smoke chamber; The supporting top surface is provided with a limit partition on the left and right sides of the smoke outlet; an exhaust cavity is provided inside the limit partition; and a plurality of ventilation holes communicating with the exhaust cavity are provided on the opposite surface of the limit partition; The first end of the three-way solenoid valve is connected to the exhaust cavity of the limiting partitions on both sides, the second end is connected to the smoke chamber, and the third end is connected to the air inlet end of the exhaust fan; The light source assembly is arranged above the base and has a light emitting end facing the base.

2. A filter smoke test device according to claim 1, characterized in that: The supporting top surface is provided with an inlet and outlet hole on at least one of the left and right sides of the smoke outlet; the inlet and outlet hole is connected to the smoke chamber; The smoke test device includes an opening and closing component; the opening and closing component is arranged in the smoke chamber and includes a cover plate and a spring; The front or rear end of the cover is hinged to the base, and has a first position for closing the smoke outlet and a second position for moving downward away from the first position and opening the smoke outlet. The spring is arranged between the cover and the base, and has an elastic force that drives the cover toward the first position. A pressing block is provided on the cover plate corresponding to the inlet and outlet holes; the pressing block is movably arranged in the inlet and outlet holes; in the first position, the pressing block is exposed above the top surface of the bearing; The filter has a test position on the load-bearing top surface between the limiting partitions on both sides; in the test position, the profile frame of the filter covers the inlet and outlet holes.

3. A filter smoke test device according to claim 2, characterized in that: A slope is provided on the top surface of the pressure block; the slope has a sloped lower end extending toward the front side of the base and an sloped upper end extending toward the rear side of the base; in the first position, the sloped lower end of the slope is lower than the bearing top surface, and the sloped upper end of the slope is higher than the bearing top surface.

4. A filter smoke test device according to claim 1, characterized in that: The light source assembly includes a bracket and a light-emitting unit arranged on the bracket; the bracket is arranged on a base and is adjustable in height up and down.

5. A filter smoke test device according to claim 4, characterized in that: One of the base and the bracket has a plurality of first sockets spaced apart at upper and lower edges, and the other has a plurality of second sockets spaced apart at upper and lower edges; the first sockets and the second sockets at corresponding positions are fixed by inserting and locking bolt assemblies.

6. The filter smoke test device according to claim 1, characterized in that: A stop plate is provided on the bearing top surface at the rear side of the smoke outlet; a position sensor for detecting the position of the filter is provided on the stop plate.

7. The filter smoke test device according to claim 1, characterized in that: The smoke generating device is an aerosol generator, which is used to generate PAO smoke.

8. The filter smoke test device according to claim 1, characterized in that: The three-way solenoid valve has at least a first state and a second state; in the first state, the exhaust fan is connected to the exhaust chamber through the three-way solenoid valve; in the second state, the exhaust fan is connected to the smoke chamber through the three-way solenoid valve.

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