Negative pressure filter detection device

Abstract

The negative pressure filter detection device comprises an upper shell and a lower shell, an opening and a pressing device are arranged at the top of the upper shell, a detection pipe is arranged in the upper shell, the two ends of the detection pipe are connected to the top of the lower shell through connecting pieces, and a plurality of first open holes are evenly formed in the upper end face of the detection pipe at intervals; a plurality of second openings are uniformly formed in the lower end face of the detection pipe at intervals, the middle of the detection pipe vertically extends out of the cavity to form a connecting pipe, and the connecting pipe penetrates through the upper shell to be connected with an external detection instrument; a first through hole is formed in the top of the lower shell, a draught fan is arranged in a sleeving mode through the first through hole, a filter to be detected is pressed through a pressing device, a distance is reserved between the bottom of the filter to be detected and the detection pipe, and the draught fan rotates an impeller to generate negative pressure air suction to suck air in the upper shell downwards. And an external detection instrument detects the concentration of dust particles introduced into the detection tube through the connecting tube so as to judge whether the filter paper of the detected filter reaches the standard or not.

Description

Technical Field

[0001] The present invention relates to the technical field of filter detection, and more specifically, to a negative pressure filter detection device. Background Art

[0002] With the rapid development of science and technology, the requirements for air cleanliness are getting higher and higher. The core component of the air filtration system is the air filter. After the filter has been used for a period of time, the filter element needs to be replaced before it can continue to be used. Therefore, the filter plays a very important role. Therefore, the filtering effect of the filter needs to be tested after the product is produced.

[0003] Prior art CN 210051522 U discloses a V-shaped single flange test fixture, comprising a metal outer frame, the bottom end of the metal outer frame is movably equipped with a mounting base through a flange buckle, the inner cavity of the metal outer frame is nested with a V-shaped filter, the bottom of the V-shaped filter is fixedly connected with a single flange, the bottom of the metal outer frame is provided with a receiving groove matched with the single flange, and the left and right sides of the inner wall of the receiving groove are provided with buffer grooves, the side wall of the inner cavity of the buffer groove away from the opening is fixedly connected with a support spring, and the other end of the support spring is fixedly connected with a clamping block matched with the single flange, which can realize special testing of the V-shaped filter and rapid installation of the filter and the fixture.

[0004] However, the above technology is only for implementing specialized tests on V-type filters, has great limitations, and still has many installation parts, which is not convenient enough. Summary of the invention

[0005] In view of this, in order to solve the above problems, the present invention proposes a negative pressure filter detection device, which uses negative pressure suction by a fan 7, an opening is set on the detection tube 3, and an external detection instrument is connected to detect whether the filter paper of the filter meets the standard. The detection tube 3 can better integrate the air and dust particles inside the upper shell, is simple to operate, easy to install, has wide applicability and high detection efficiency.

[0006] A negative pressure filter detection device, comprising an upper shell 1 and a lower shell 6, wherein the upper shell 1 and the lower shell 6 are both hollow cavities, and the characteristics thereof are as follows: an opening 11 and a clamping device 2 are provided at the top of the upper shell 1, a detection tube 3 is provided in the upper shell 1, and both ends of the detection tube 3 are connected to the top of the lower shell 6 through a connecting piece 33, a plurality of first openings 31 are evenly spaced on the upper end surface of the detection tube 3, a plurality of second openings 32 are evenly spaced on the lower end surface of the detection tube 3, a connecting tube 4 is vertically extended out of the cavity in the middle of the detection tube 3, and the connecting tube 4 passes through The upper shell 1 is connected to an external detection instrument; a first through hole 61 is provided on the top of the lower shell 6, and a fan 7 is sleeved through the first through hole 61. The filter to be detected is placed in the upper shell 1, and the filter to be detected is pressed by the pressing device 2. A gap is left between the bottom of the filter to be detected and the detection tube 3. The fan 7 rotates the impeller to generate negative pressure suction to suck the wind in the upper shell 1 downward. The external detection instrument detects the concentration of dust particles passing into the detection tube 3 through the connecting tube 4. If it exceeds the set value, an alarm will be triggered to determine whether the filter paper of the filter being detected meets the standard.

[0007] Furthermore, the spacing between adjacent first openings 31 or adjacent second openings 32 is 25-35 mm.

[0008] In some embodiments, the plurality of first openings 31 and the second openings 32 are arranged in one-to-one correspondence or staggered arrangement.

[0009] Furthermore, the distance between the bottom of the filter to be tested and the testing tube 3 is 45-55 mm.

[0010] Furthermore, a transfer tube 5 is sleeved on the outer side of the middle of the detection tube 3, one end of a connecting tube 4 is connected perpendicular to the transfer tube 5, and the other end of the connecting tube 4 passes through the side wall of the upper shell 1 and is connected to an external detection instrument.

[0011] Furthermore, the connecting member 33 is arranged on both sides of the top of the lower shell 6, one end of the connecting member 33 is fixedly connected to the top of the lower shell 6, and the other end of the connecting member 33 is connected to one end of the detection tube 3, so that the two connecting members 33 block both ends of the connecting tube 4, and during negative pressure suction, the wind can only pass through the first opening 31 and the second opening 32, and will not leak from both ends.

[0012] Furthermore, the clamping device 2 includes a symmetrically arranged pressing plate 21, a connecting seat 22, and a locking buckle 23. The connecting seat 22 is fixed to one side of the top of the upper shell 1, and the locking buckle 23 is fixed to the side wall of the upper shell 1 away from the connecting seat 22. One end of the pressing plate 21 is rotatably connected to the connecting seat 22 by a screw, and the other end is movably locked with the locking buckle 23. The pressing plate 21 is opened, and the flange mouth of the filter to be tested is buckled on the outside of the opening 11 at the top of the upper shell 1. The pressing plate 21 is pressed down so that the pressing plate 21 presses the filter to be tested. The pressing plate 21 is locked by the locking buckle 23 to limit the filter to be tested, so that the filter to be tested will not shake due to wind force during testing and affect the test result.

[0013] Furthermore, a circle of sealing gasket is provided at the outer edge of the opening 11 of the upper shell 1, so that the connection between the filter to be tested and the upper shell 1 fits tightly and is not easy to leak air.

[0014] Furthermore, a guide plate 12 extends downward from the opening 11 of the upper shell 1 to guide the filter to be tested into the upper shell 1 and to strengthen the structure of the opening 11 .

[0015] Furthermore, a bracket 62 is provided at the bottom of the lower shell 6 , and the bracket 62 is connected to the bottom of the fan 7 .

[0016] Furthermore, the lower shell 6 is densely covered with ventilation holes 63 around it for dissipating heat from the fan 7 .

[0017] Beneficial effects of the present invention: The present invention proposes a negative pressure filter detection device, comprising an upper shell 1 and a lower shell 6, wherein the upper shell 1 and the lower shell 6 are both hollow cavities, the top of the upper shell 1 is provided with an opening 11 and a clamping device 2, and a detection tube 3 is provided in the upper shell 1, through which the air and dust particles inside the upper shell can be better integrated to reduce the interference of external conditions; the two ends of the detection tube 3 are connected to the top of the lower shell 6 through a connecting piece 33, the upper end surface of the detection tube 3 is evenly spaced with a plurality of first openings 31, the lower end surface of the detection tube 3 is evenly spaced with a plurality of second openings 32, and the middle part of the detection tube 3 is vertically extended outside the cavity with a connecting piece 33; The connecting pipe 4 passes through the upper shell 1 and is connected to an external detection instrument; a first through hole 61 is provided on the top of the lower shell 6, and a fan 7 is sleeved through the first through hole 61. The filter to be detected is placed in the upper shell 1, and the filter to be detected is pressed by the pressing device 2. A gap is left between the bottom of the filter to be detected and the detection tube 3. The fan 7 rotates the impeller to generate negative pressure suction to suck the wind in the upper shell 1 downward. The external detection instrument detects the concentration of dust particles passing into the detection tube 3 through the connecting pipe 4. If it exceeds the set value, an alarm will be issued to determine whether the filter paper of the filter being detected is up to standard. The operation is simple, the installation is convenient, the applicability is wide, and the detection efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall structural diagram of the negative pressure filter detection device of the present invention.

[0019] Figure 2 It is a diagram of the internal structure of the negative pressure filter detection device of the present invention.

[0020] Figure 3 It is a top view of the negative pressure filter detection device of the present invention.

[0021] Figure 4 It is a bottom view of the negative pressure filter detection device of the present invention.

[0022] Main component symbols

[0023] Upper shell 1, opening 11, guide plate 12, clamping device 2, pressing plate 21, connecting seat 22, lock buckle 23, detection tube 3, first opening 31, second opening 32, connecting piece 33, connecting tube 4, transfer tube 5, lower shell 6, first through hole 61, bracket 62, ventilation hole 63, fan 7.

[0024] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION Example

[0025] like Figure 1 , 2 As shown in , 3, a negative pressure filter detection device comprises an upper shell 1 and a lower shell 6, wherein the upper shell 1 and the lower shell 6 are both hollow cavities, and the characteristics are as follows: an opening 11 and a clamping device 2 are provided at the top of the upper shell 1, a detection tube 3 is provided in the upper shell 1, and both ends of the detection tube 3 are connected to the top of the lower shell 6 through a connecting piece 33, a plurality of first openings 31 are evenly spaced on the upper end surface of the detection tube 3, a plurality of second openings 32 are evenly spaced on the lower end surface of the detection tube 3, a connecting tube 4 is vertically extended out of the cavity from the middle part of the detection tube 3, and the connecting tube 4 It passes through the upper shell 1 and is connected to an external detection instrument; a first through hole 61 is provided on the top of the lower shell 6, and a fan 7 is sleeved through the first through hole 61. The filter to be detected is placed in the upper shell 1, and the filter to be detected is pressed by the pressing device 2. A gap is left between the bottom of the filter to be detected and the detection tube 3. The fan 7 rotates the impeller to generate negative pressure suction to suck the wind in the upper shell 1 downward. The external detection instrument detects the concentration of dust particles passing into the detection tube 3 through the connecting tube 4. If it exceeds the set value, an alarm will be triggered to determine whether the filter paper of the filter being detected is up to standard.

[0026] The detection tube is arranged on a vertical bisector of the upper shell body close to the bottom.

[0027] The distance between adjacent first openings 31 or adjacent second openings 32 is 30 mm.

[0028] The plurality of first openings 31 and the second openings 32 are staggered.

[0029] The distance between the bottom of the filter to be tested and the test tube 3 is 50 mm.

[0030] When the connecting tube 4 is arranged at any point on the detection tube 3, the influence on the detection result is not significant.

[0031] like Figure 2 As shown, a transfer tube 5 is sleeved on the outer side of the middle of the detection tube 3, one end of a connecting tube 4 is connected perpendicular to the transfer tube 5, and the other end of the connecting tube 4 passes through the side wall of the upper shell 1 and is connected to an external detection instrument.

[0032] The connecting piece 33 is arranged on both sides of the top of the lower shell 6, one end of the connecting piece 33 is fixedly connected to the top of the lower shell 6, and the other end of the connecting piece 33 is connected to one end of the detection tube 3, so that the two connecting pieces 33 block both ends of the connecting tube 4. During negative pressure suction, wind can only pass through the first opening 31 and the second opening 32, and will not leak from both ends.

[0033] like Figure 1 As shown, the clamping device 2 includes a symmetrically arranged pressing plate 21, a connecting seat 22, and a locking buckle 23. The connecting seat 22 is fixed to one side of the top of the upper shell 1, and the locking buckle 23 is fixed to the side wall of the upper shell 1 away from the connecting seat 22. One end of the pressing plate 21 is rotatably connected to the connecting seat 22 by a screw, and the other end is movably locked with the locking buckle 23. The pressing plate 21 is opened, and the flange mouth of the filter to be tested is buckled on the outside of the opening 11 at the top of the upper shell 1. The pressing plate 21 is pressed down so that the pressing plate 21 presses the filter to be tested, and the pressing plate 21 is locked by the locking buckle 23 to limit the filter to be tested, so that the filter to be tested will not shake due to wind force during testing and affect the test result.

[0034] A circle of sealing gasket is arranged at the outer edge of the opening 11 of the upper shell 1, so that the connection between the filter to be tested and the upper shell 1 fits tightly and is not easy to leak air.

[0035] A guide plate 12 extends downward from the opening 11 of the upper shell 1 to guide the filter to be tested into the upper shell 1 and to strengthen the structure of the opening 11 .

[0036] like Figure 4 As shown, a bracket 62 is provided at the bottom of the lower shell 6 , and the bracket 62 is connected to the bottom of the fan 7 .

[0037] like Figure 2As shown, the lower shell 6 is densely covered with ventilation holes 63 around it for dissipating heat from the fan 7.

[0038] Beneficial effects of the present invention: The present invention proposes a negative pressure filter detection device, comprising an upper shell 1 and a lower shell 6, wherein the upper shell 1 and the lower shell 6 are both hollow cavities, the top of the upper shell 1 is provided with an opening 11 and a clamping device 2, and a detection tube 3 is provided in the upper shell 1, through which the air and dust particles inside the upper shell can be better integrated to reduce the interference of external conditions; the two ends of the detection tube 3 are connected to the top of the lower shell 6 through a connecting piece 33, the upper end surface of the detection tube 3 is evenly spaced with a plurality of first openings 31, the lower end surface of the detection tube 3 is evenly spaced with a plurality of second openings 32, and the middle part of the detection tube 3 is vertically extended outside the cavity with a connecting piece 33; The connecting pipe 4 passes through the upper shell 1 and is connected to an external detection instrument; a first through hole 61 is provided on the top of the lower shell 6, and a fan 7 is sleeved through the first through hole 61. The filter to be detected is placed in the upper shell 1, and the filter to be detected is pressed by the pressing device 2. A gap is left between the bottom of the filter to be detected and the detection tube 3. The fan 7 rotates the impeller to generate negative pressure suction to suck the wind in the upper shell 1 downward. The external detection instrument detects the concentration of dust particles passing into the detection tube 3 through the connecting pipe 4. If it exceeds the set value, an alarm will be issued to determine whether the filter paper of the filter being detected is up to standard. The operation is simple, the installation is convenient, the applicability is wide, and the detection efficiency is high.

[0039] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A negative pressure filter detection device, comprising an upper shell (1) and a lower shell (6), wherein the upper shell (1) and the lower shell (6) are both hollow cavities, and wherein: The top of the upper shell (1) is provided with an opening (11) and a clamping device (2); a detection tube (3) is provided inside the upper shell (1); both ends of the detection tube (3) are connected to the top of the lower shell (6) via connecting pieces (33); a plurality of first openings (31) are evenly spaced on the upper end surface of the detection tube (3); a plurality of second openings (32) are evenly spaced on the lower end surface of the detection tube (3); a connecting tube (4) is vertically extended outside the cavity from the middle of the detection tube (3); the connecting tube (4) passes through the upper shell (1) and is connected to an external detection instrument; the lower shell A first through hole (61) is provided at the top of the housing (6), and a fan (7) is sleeved through the first through hole (61). The filter to be tested is placed in the upper housing (1), and the filter to be tested is pressed by the pressing device (2). A gap is left between the bottom of the filter to be tested and the detection tube (3). The fan (7) rotates the impeller to generate negative pressure suction to suck the wind in the upper housing (1) downward. An external detection instrument detects the concentration of dust particles passing into the detection tube (3) through the connecting tube (4). If the concentration exceeds a set value, an alarm is triggered to determine whether the filter paper of the filter being tested meets the standard.

2. The negative pressure filter detection device according to claim 1, characterized in that: The spacing between adjacent first openings (31) or adjacent second openings (32) is 25-35 mm.

3. The negative pressure filter detection device according to claim 1, characterized in that: The distance between the bottom of the filter to be tested and the test tube (3) is 45-55 mm.

4. The negative pressure filter detection device according to claim 1, characterized in that: A transfer tube (5) is sleeved on the outer side of the middle of the detection tube (3), one end of a connecting tube (4) is connected perpendicularly to the transfer tube (5), and the other end of the connecting tube (4) passes through the side wall of the upper shell (1) and is connected to an external detection instrument.

5. The negative pressure filter detection device according to claim 1, characterized in that: The connecting member (33) is arranged on both sides of the top of the lower shell (6), one end of the connecting member (33) is fixedly connected to the top of the lower shell (6), and the other end of the connecting member (33) is connected to one end of the detection tube (3), so that the two connecting members (33) block both ends of the connecting tube (4), and when negative pressure suction is performed, the wind can only pass through the first opening (31) and the second opening (32), and no air will leak from both ends.

6. The negative pressure filter detection device according to claim 1, characterized in that: The clamping device (2) comprises a symmetrically arranged pressing plate (21), a connecting seat (22), and a locking buckle (23); the connecting seat (22) is fixed to one side of the top of the upper shell (1); the locking buckle (23) is fixed to a side wall of the upper shell (1) away from the connecting seat (22); one end of the pressing plate (21) is rotatably connected to the connecting seat (22) by means of a screw, and the other end is movably locked with the locking buckle (23); the pressing plate (21) is opened, and the flange of the filter to be tested is buckled onto the outside of the opening (11) at the top of the upper shell (1); the pressing plate (21) is pressed downward so that the pressing plate (21) presses the filter to be tested; the pressing plate (21) is locked by means of the locking buckle (23) to limit the position of the filter to be tested, so that the filter to be tested will not be shaken by wind during testing, affecting the test result.

7. The negative pressure filter detection device according to claim 1, characterized in that: A circle of sealing gasket is provided on the outer edge of the opening (11) of the upper shell (1), so that the connection between the filter to be tested and the upper shell (1) fits tightly and is not prone to air leakage.

8. The negative pressure filter detection device according to claim 1, characterized in that: A guide plate (12) extends downward from the opening (11) of the upper shell (1) and is used to guide the filter to be tested into the upper shell (1) and to strengthen the structure at the opening (11).

9. The negative pressure filter detection device according to claim 1, characterized in that: A bracket (62) is provided at the bottom of the lower shell (6), and the bracket (62) is connected to the bottom of the fan (7).

10. The negative pressure filter detection device according to claim 1, characterized in that: The lower shell (6) is densely covered with ventilation holes (63) around its periphery for dissipating heat from the fan (7).

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