Dust particle counter suitable for leak detection of filter

Abstract

The utility model discloses a dust particle counter suitable for leak detection of a filter, which relates to the technical field of dust particle counters and specifically comprises a dust particle counter body, an air inlet structure and a dust cleaning structure, a groove is arranged on one side of the dust particle counter body, the air inlet structure is arranged in an inner cavity of the groove, and the dust cleaning structure is arranged in the inner cavity of the groove. The air inlet structure comprises a fixed ring fixedly connected with the inner cavity of the groove and a rotating ring movably connected with the fixed ring, measuring cavities are evenly formed in the rotating ring, and the ends, away from the fixed ring, of the measuring cavities are fixedly connected with air inlet pipes. According to the dust particle counter suitable for leak detection of the filter, through the arrangement of the air inlet structure and the ash removal structure, the dust particle counter is provided with a plurality of ventilation pipelines, and the positions of the ventilation pipelines can be rapidly changed, so that in the working process of the dust particle counter, the ash removal structure can carry out ash removal on the used ventilation pipelines; and the working efficiency of the dust particle counter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust particle counters, in particular to a dust particle counter suitable for filter leak detection. Background Art

[0002] The development of modern science and technology has put forward higher requirements for the cleanliness of ambient air, especially in the industries of microelectronics, biology, medical treatment, pharmaceuticals, precision machinery, chemical industry, aerospace, etc. High efficiency / ultra-high efficiency filters are the core key equipment of ultra-clean environment. The quality of their performance is directly related to the level of ultra-clean environment. Effective and reliable detection devices are the guarantee for the production of high-quality air filters. In the prior art, a commonly used instrument for filter leak detection is a dust particle counter. The existing dust particle counter usually includes a light source, a measuring cavity, a light detector, a flow monitor, an air pump, a filter and a circuit system. When the dust particle counter is in use, the air pump pumps the air to be tested to the measuring device through the ventilation pipeline. The light from the light source is focused by the lens group in the measuring cavity. When each particle in the air passes through the measuring cavity quickly, it scatters the incident light once to form a light pulse signal. This light signal is sent to the light detector through another lens group, and is proportionally converted into an electrical pulse signal. Then, it is amplified and identified by the electronic circuit of the instrument, and the required signal is picked out and displayed through the counting system.

[0003] The dust particle counter disclosed in the prior art usually has only one ventilation duct. Since the dust in the air may adhere to the ventilation duct when the air to be tested flows in the ventilation duct, the ventilation duct needs to be cleaned after each use in order not to affect the accuracy of the next detection. However, the dust particle counter with only one ventilation duct cannot work during the cleaning process, which affects the working efficiency of the dust particle counter. Before the ventilation duct is connected to the filter, the inside of the ventilation duct is connected to the external environment. The ventilation duct is easily contaminated by the external environment, which affects the accuracy of the detection result. Based on this, the present application proposes a dust particle counter suitable for filter leak detection. Utility Model Content

[0004] The utility model provides a dust particle counter suitable for filter leak detection, which solves the problem proposed in the above background technology that the dust particle counter cannot work during the cleaning process of the ventilation pipeline of the dust particle counter, thereby affecting the working efficiency; before the ventilation pipeline is connected to the filter, the inside of the ventilation pipeline is in a connected state with the external environment, and the ventilation pipeline is easily contaminated by the external environment, thereby affecting the accuracy of the detection result.

[0005] The utility model provides the following technical scheme: a dust particle counter suitable for filter leak detection, comprising a dust particle counter body, an air intake structure and a dust cleaning structure, a side of the dust particle counter body is provided with a groove, an inner cavity of the groove is provided with an air intake structure, the air intake structure comprises a fixing ring fixedly connected to the inner cavity of the groove, a rotating ring movably connected to the fixing ring, a measuring cavity is evenly arranged on the rotating ring, one end of the measuring cavity away from the fixing ring is fixedly connected to an air inlet pipe, the other end of the measuring cavity is fixedly connected to an air outlet pipe, a dust filter is fixedly connected to the inner cavity of the other end of the air outlet pipe, a fixing column is fixedly connected to the middle part of the inner cavity of the groove, the fixing column is located in the inner cavity of the rotating ring, a light source is provided on one side of the fixing column, a light detector is fixed on the side of the inner wall of the groove close to the light source, a sealing cover is fixed on the outer side of the groove, a through hole adapted to the air inlet pipe is provided on the sealing cover, an opening and closing door is provided on the outer side of one of the through holes, and exhaust pipes are fixed on the outer sides of the remaining through holes;

[0006] A cleaning structure is provided in the inner cavity of the dust particle counter body, and the cleaning structure includes an exhaust pump and an ion fan. An air inlet pipe 1 is fixed to the air inlet end of the exhaust pump, and a cleaning pipe 1 is fixedly connected to the air outlet end of the exhaust pump. A cleaning pipe 2 is fixedly connected to the air outlet end of the ion fan. The other ends of the air inlet pipe 1, the cleaning pipe 1 and the cleaning pipe 2 all pass through the fixed ring and contact with the rotating ring. The air inlet end of the ion fan extends to the outside of the dust particle counter body through the air inlet pipe 2.

[0007] Preferably, a one-way valve is provided at one end of the exhaust pipe.

[0008] Preferably, a gear ring is fixed to the inner wall of the rotating ring near the sealing cover, and a rotating motor is fixedly connected to one end of the fixing column near the sealing cover. A gear is fixedly connected to the end of the output shaft of the rotating motor, and the gear meshes with the gear ring.

[0009] Preferably, the ash cleaning pipe 1 is located between the air inlet pipe 1 and the ash cleaning pipe 2, and the distance between the ash cleaning pipe 1 and the air inlet pipe 1 or the ash cleaning pipe 2 is the same as the distance between two adjacent air outlet pipes.

[0010] Preferably, the other end of the second air inlet pipe is fixedly connected to a second dust filter, and the mesh diameter of the second dust filter is the same as the mesh diameter of the first dust filter.

[0011] Preferably, one end of the opening and closing door is movably connected to the sealing cover, the other end of the opening and closing door is magnetically attracted to the sealing cover, and a handle is fixed on the outer side of the other end of the opening and closing door.

[0012] Preferably, there are three through holes, and the axis line of the through hole is in the same straight line with the axis line of the end of the air inlet pipe 1 in contact with the rotating ring, the axis line of the end of the ash cleaning pipe 1 in contact with the rotating ring, or the axis line of the end of the ash cleaning pipe 2 in contact with the rotating ring.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The dust particle counter suitable for filter leak detection has a plurality of ventilation pipes through the arrangement of an air intake structure and a cleaning structure. The positions of the ventilation pipes can be changed quickly, so that during the operation of the dust particle counter, the cleaning structure can clean the ventilation pipes after use, thereby improving the working efficiency of the dust particle counter.

[0015] 2. The dust particle counter suitable for filter leak detection can intercept impurities in the gas to be tested in the ventilation duct through the setting of the dust filter and the cleaning structure, so as to avoid the impurities from contaminating the suction pump, and the filtered gas can be used to clean the ventilation duct after use, thus saving energy; through the setting of the ion fan, the operation of the ion fan can perform a second cleaning on the ventilation duct that has been cleaned once, so as to avoid dust being adsorbed on the ventilation duct due to static electricity, thereby improving the cleaning effect of the ventilation duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the structure of the utility model;

[0017] Figure 2 The utility model structure Figure 1 Back side diagram;

[0018] Figure 3 This is a schematic diagram of the opening of the structural opening and closing door of the utility model;

[0019] Figure 4 This is a schematic diagram of the interior of the structural groove of the utility model;

[0020] Figure 5 The utility model structure Figure 1 Explosion diagram;

[0021] Figure 6 The utility model structure Figure 5 Schematic diagram on the left;

[0022] Figure 7 This is a schematic diagram of the rotating ring structure of the utility model;

[0023] Figure 8 The utility model structure Figure 1 Schematic cross section.

[0024] In the figure: 1. Dust particle counter body; 2. Sealing cover; 3. Dust filter 2; 4. One-way valve; 5. Exhaust pipe; 6. Opening and closing door; 7. Rotating ring; 8. Inlet pipe; 9. Through hole; 10. Gear ring; 11. Measuring chamber; 12. Vacuum pump; 13. Fixed column; 14. Gear; 15. Rotating motor; 16. Ion fan; 17. Inlet pipe 2; 18. Fixed ring; 19. Cleaning pipe 1; 20. Dust filter 1; 21. Photo detector; 22. Light source. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides a dust particle counter suitable for filter leak detection, comprising a dust particle counter body 1, an air intake structure and a dust cleaning structure. A groove is provided on one side of the dust particle counter body 1, and an air intake structure is provided in the inner cavity of the groove. The air intake structure comprises a fixed ring 18 fixedly connected to the inner cavity of the groove and a rotating ring 7 movably connected to the fixed ring 18. A measuring cavity 11 is evenly arranged on the rotating ring 7. An end of the measuring cavity 11 away from the fixed ring 18 is fixedly connected to an air intake pipe 8, and the other end of the measuring cavity 11 is fixedly connected to an air outlet pipe. The air intake pipe 8, the measuring cavity 11 and the air outlet pipe form a ventilation pipeline of the dust particle counter. External air can enter the inner cavity of the measuring cavity 11 through the air intake pipe 8, and the air passing through the measuring cavity 11 can be discharged through the air outlet pipe. A dust filter 20 is fixedly connected to the inner cavity of the other end of the air outlet pipe. Through the setting of the dust filter 20, the dust filter 20 can intercept impurities in the air and make the impurities stay in the inner cavity of the ventilation pipe to prevent the impurities from affecting other components, thereby facilitating the cleaning of the dust particle counter.

[0027] A fixed column 13 is fixedly connected to the middle of the inner cavity of the groove, and the fixed column 13 is located in the inner cavity of the rotating ring 7. The inner wall of the rotating ring 7 away from the fixed ring 18 is fixedly connected to the gear ring 10. The end of the fixed column 13 close to the gear ring 10 is fixedly connected to the rotating motor 15. The end of the output shaft of the rotating motor 15 is fixedly connected to the gear 14 through a reducer, and the gear 14 is meshed with the gear ring 10. Through the setting of the rotating motor 15, the rotation of the rotating motor 15 can drive the gear 14 fixedly connected thereto to rotate, and the gear 14 drives the rotating ring 7 to rotate through the gear ring 10 meshed therewith. When the rotating ring 7 rotates, the position of the measuring cavity 11 and its connecting structure can change.

[0028] A light source 22 is disposed on one side of the fixing column 13 , a light detector 21 is fixed on one side of the inner wall of the groove close to the light source 22 , and the measuring cavity 11 can be moved between the light source 22 and the light detector 21 .

[0029] It can be seen from the above description that when the dust particle counter is in use, different measuring chambers 11 can be moved between the light source 22 and the light detector 21 to achieve rapid replacement of the ventilation pipeline, thereby facilitating the use of the dust particle counter.

[0030] A cleaning structure is provided in the inner cavity of the dust particle counter body 1, and the cleaning structure includes an exhaust pump 12 and an ion fan 16. An air inlet pipe 1 is fixed to the air inlet end of the exhaust pump 12, and a cleaning pipe 19 is fixedly connected to the air outlet end of the exhaust pump 12, and a cleaning pipe 2 is fixedly connected to the air outlet end of the ion fan 16. The other ends of the air inlet pipe 1, the cleaning pipe 19 and the cleaning pipe 2 all pass through the fixed ring 18 and contact with the rotating ring 7, and the cleaning pipe 1 19 is located between the air inlet pipe 1 and the cleaning pipe 2, and the distance between the cleaning pipe 1 19 and the air inlet pipe 1 or the cleaning pipe 2 is the same as the distance between two adjacent air outlet pipes. When the vacuum pump 12 is working, the gas to be tested can enter the inner cavity of the vacuum pump 12 through the ventilation pipe in contact with the air inlet pipe, and the gas entering the vacuum pump 12 is filtered by the dust filter 20, and the remaining gas after filtration enters the inner cavity of the outlet pipe in contact with the cleaning pipe 19 from the cleaning pipe 19, thereby realizing the initial cleaning of the ventilation pipe in contact with the cleaning pipe 19, and the operation of the ion fan 16 can blow the gas containing a large amount of positive and negative ions into the ventilation pipe after the initial cleaning, thereby realizing the secondary cleaning of the ventilation pipe, avoiding dust adsorbed on the ventilation pipe due to static electricity, and improving the cleaning effect of the ventilation pipe.

[0031] The air inlet end of the ion blower 16 extends to the outside of the dust particle counter body 1 through the air inlet pipe 17, and the other end of the air inlet pipe 17 is fixedly connected to the dust filter 3, and the mesh diameter of the dust filter 3 is the same as the mesh diameter of the dust filter 1 20. Through the setting of the dust filter 3, the dust filter 3 can filter the gas entering the ion blower 16 to prevent impurities in the gas from affecting the cleaning effect of the ventilation pipeline.

[0032] From the above description, it can be seen that the dust particle counter is provided with multiple ventilation ducts, and the positions of the multiple ventilation ducts can be quickly replaced, which is convenient for the use of the counter. In the sampling process of the present application, the ventilation duct can be cleaned twice after use to achieve self-cleaning of the ventilation duct, which can improve the working efficiency of the present application.

[0033] A sealing cover 2 is fixed to the outer side of the groove, and the sealing cover 2 is provided with a through hole 9 adapted to the air inlet pipe 8. There are three through holes 9, and the axis line of the through hole 9 is in the same straight line with the axis line of the end of the air inlet pipe 1 that contacts the rotating ring 7, the axis line of the end of the dust cleaning pipe 19 that contacts the rotating ring 7, or the axis line of the end of the dust cleaning pipe 2 that contacts the rotating ring 7, and an opening and closing door 6 is provided on the outer side of the through hole 9 adapted to the air inlet pipe 1. Through the arrangement of the through hole 9 and the opening and closing door 6, when the opening and closing door 6 is in an open state and the air inlet pipe 8 overlaps with the through hole 9, the present application can realize the sampling of the gas to be tested. If the opening and closing door 6 is in a closed state, the through hole 9 can be blocked to prevent dust from falling in the through hole 9, and when the dust particle counter is connected to the air outlet end of the filter to be tested through a pipeline, the air inlet pipe 8 and the through hole 9 can be staggered, so that the air inlet pipe 8 is in a sealed state, thereby preventing the air inlet pipe 8 from being contaminated by the external environment.

[0034] The outsides of the remaining through holes 9 are all fixed with exhaust pipes 5, and one end of the exhaust pipe 5 is provided with a one-way valve 4. Through the setting of the exhaust pipe 5, the exhaust gas generated during the dust cleaning process can be discharged, and the setting of the one-way valve 4 prevents the outside air from entering the ventilation pipeline.

[0035] In some embodiments of the present application, a balloon is fixed to one end of the exhaust pipe 5 away from the dust particle counter body 1, and the balloon is used to collect the gas discharged from the exhaust pipe 5 to prevent the gas discharged from the exhaust pipe 5 from affecting the use of the counter.

[0036] One end of the opening and closing door 6 is movably connected to the sealing cover 2, and the other end of the opening and closing door 6 is magnetically attracted to the sealing cover 2, and a handle is fixed on the outer side of the other end of the opening and closing door 6. The opening and closing of the through hole 9 is facilitated by the arrangement of the opening and closing door 6. In some embodiments of the present application, permanent magnets are fixed on the other end of the opening and closing door 6 and the sealing cover 2.

[0037] The dust particle counter body 1 is a prior art. In some embodiments of the present application, the model of the dust particle counter body 1 is Y09-310.

[0038] The electrical components involved in this application are all prior art, and technicians in this field are familiar with their connection methods. Through these technicians, all the electrical components in this application are connected to their compatible power supplies through wires, and according to the actual situation, a suitable controller is selected to meet the control requirements. The specific connection and control sequence are described below. The electrical connection is completed in a sequential working order, and the detailed connection means are well known in the art. The following mainly introduces the working principle and process, and no further explanation of the electrical control is given.

[0039] In summary, the steps of the dust particle counter for leak detection of the filter are as follows: the user connects the air inlet end of the filter to be tested to the air outlet end of the smoke generator (model YWQ-FD300) in the prior art through a suitable pipe; the user opens the opening and closing door 6, and uses a suitable pipe to fix the air outlet end of the filter to be tested to the exposed through hole 9; the rotating motor 15 rotates, and the rotating motor 15 drives the gear 14 fixedly connected thereto to rotate, and the gear 14 drives the rotating ring 7 to rotate through the gear ring 10 meshing therewith, and the rotation of the rotating ring 7 causes the position of the air inlet pipe 8 to change until the air inlet pipe 8 overlaps with the through hole 9; the vacuum pump 12 and the smoke generator are started, and the vacuum pump 12 and the smoke generator work, so that the gas filtered by the filter can enter the inner cavity of the air inlet pipe 8, and the light from the light source 22 is focused by the lens group into the measuring cavity. When each particle in the gas passes through the measuring cavity quickly, it scatters the incident light once to form an optical pulse signal. This light signal is sent to the photodetector 21 through another lens group and converted into an electrical pulse signal in proportion. It is then amplified and identified by the electronic circuit of the dust particle counter, and the required signal is picked out and displayed through the counting system. Based on the detection result, it is determined whether there is a leak in the filter, and the filter leak detection operation is performed; the measured gas is filtered by the dust filter 20 and then pumped into another ventilation pipeline by the vacuum pump 12, so that the other ventilation pipeline is cleaned.

[0040] When the present application is in use, when checking for leaks on the next filter, the rotating motor 15 drives the rotating ring 7 to rotate, so that the unused ventilation duct overlaps with the exposed through hole 9, thereby realizing rapid replacement of the ventilation duct. The used ventilation duct moves to the exhaust passage of the cleaning pipe 19, and the ventilation duct can be cleaned for the first time. After the first cleaning, the ventilation duct moves to the exhaust passage of the cleaning pipe 2, and the operation of the ion fan 16 can realize secondary cleaning of the ventilation duct.

[0041] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A dust particle counter suitable for filter leak detection, comprising a dust particle counter body (1), an air intake structure and a dust cleaning structure, characterized in that: A groove is provided on one side of the dust particle counter body (1), and an air intake structure is provided in the inner cavity of the groove. The air intake structure comprises a fixed ring (18) fixedly connected to the inner cavity of the groove, and a rotating ring (7) movably connected to the fixed ring (18). The rotating ring (7) is evenly provided with a measuring cavity (11). One end of the measuring cavity (11) away from the fixed ring (18) is fixedly connected to an air intake pipe (8), and the other end of the measuring cavity (11) is fixedly connected to an air outlet pipe. A dust filter (20) is fixedly connected to the inner cavity of the other end of the air outlet pipe. A fixing column (13) is fixedly connected to the middle of the inner cavity of the groove, the fixing column (13) is located in the inner cavity of the rotating ring (7), a light source (22) is provided on one side of the fixing column (13), a light detector (21) is fixed on the inner wall of the groove close to the light source (22), a sealing cover (2) is fixed on the outer side of the groove, a through hole (9) adapted to the air intake pipe (8) is provided on the sealing cover (2), an opening and closing door (6) is provided on the outer side of one of the through holes (9), and exhaust pipes (5) are fixed on the outer sides of the remaining through holes (9); A cleaning structure is provided in the inner cavity of the dust particle counter body (1), and the cleaning structure includes an exhaust pump (12) and an ion fan (16). An air intake pipe 1 is fixed to the air intake end of the exhaust pump (12), and a cleaning pipe 1 (19) is fixedly connected to the air outlet end of the exhaust pump (12). A cleaning pipe 2 is fixedly connected to the air outlet end of the ion fan (16). The other ends of the air intake pipe 1, the cleaning pipe 1 (19) and the cleaning pipe 2 all pass through the fixed ring (18) and are in contact with the rotating ring (7). The air intake end of the ion fan (16) extends to the outside of the dust particle counter body (1) through the air intake pipe 2 (17).

2. A dust particle counter suitable for filter leak detection according to claim 1, characterized in that: A one-way valve (4) is provided at one end of the exhaust pipe (5).

3. A dust particle counter suitable for filter leak detection according to claim 1, characterized in that: A gear ring (10) is fixed to the inner wall of the rotating ring (7) on the side close to the sealing cover (2); a rotating motor (15) is fixedly connected to one end of the fixing column (13) close to the sealing cover (2); a gear (14) is fixedly connected to the end of the output shaft of the rotating motor (15); and the gear (14) is meshed with the gear ring (10).

4. A dust particle counter suitable for filter leak detection according to claim 1, characterized in that: The cleaning pipe 1 (19) is located between the air inlet pipe 1 and the cleaning pipe 2, and the distance between the cleaning pipe 1 (19) and the air inlet pipe 1 or the cleaning pipe 2 is the same as the distance between two adjacent air outlet pipes.

5. A dust particle counter suitable for filter leak detection according to claim 1, characterized in that: The other end of the second air inlet pipe (17) is fixedly connected to a second dust filter (3), and the mesh diameter of the second dust filter (3) is the same as the mesh diameter of the first dust filter (20).

6. A dust particle counter suitable for filter leak detection according to claim 1, characterized in that: One end of the opening and closing door (6) is movably connected to the sealing cover (2), the other end of the opening and closing door (6) is magnetically attracted to the sealing cover (2), and a handle is fixed on the outer side of the other end of the opening and closing door (6).

7. A dust particle counter suitable for filter leak detection according to claim 1, characterized in that: There are three through holes (9), and the axis of the through hole (9) is in the same straight line as the axis of the end of the air inlet pipe (1) in contact with the rotating ring (7), the axis of the end of the ash cleaning pipe (19) in contact with the rotating ring (7), or the axis of the end of the ash cleaning pipe (2) in contact with the rotating ring (7).

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