Automatic membrane replacement structure and suspended particle filtering device including the same

Abstract

The present invention relates to an automatic membrane replacement structure and a suspended particulate matter filtering device including the same, belonging to the technical field of air quality monitoring devices, comprising: a support plate, a first lifting mechanism, a second lifting mechanism and a swinging membrane replacement mechanism, wherein the support plate is provided with old membrane holes, working holes and new membrane holes at intervals; the lifting end of the first lifting mechanism extends into the working holes; the lifting end of the second lifting mechanism extends into the new membrane holes; the swinging membrane replacement mechanism comprises a swinging motor, a swinging rod and a membrane replacement ring, the swinging motor is fixed to the support plate; the swinging rod is fixed to the output shaft of the swinging motor; and the membrane replacement ring is fixed to the swinging rod. The present invention utilizes a swinging membrane replacement ring arranged relative to the old membrane hole, the working hole and the new membrane hole respectively, and cooperates with the first lifting mechanism and the second lifting mechanism to first transfer the filter membrane in the working hole that has been used for too long to the old membrane hole, and then transfer the new filter membrane on the membrane support frame in the new membrane hole to the working hole, thereby automatically completing the replacement of the old and new membranes.

Description

Technical Field

[0001] The present invention relates to the technical field of air quality monitoring devices, and in particular to an automatic membrane replacement structure and a suspended particulate matter filtering device comprising the same. Background Art

[0002] As people's health awareness continues to improve, air quality is receiving more and more attention. As an important equipment for monitoring air quality, suspended particulate matter sampling devices have gradually been widely used in various environmental testing.

[0003] The traditional suspended particulate matter sampling device is mainly composed of a chassis, a filter membrane and an analyzer. The top surface of the chassis is provided with an air inlet; the filter membrane is detachably connected to the air inlet; the analyzer is placed in the chassis; in actual application, the analyzer is turned on and the air in a specific environment is sucked in. Since the filter membrane is detachably connected to the air inlet, impurities in the air can be retained on the filter membrane and the content of suspended particles in the air can be detected; however, the suspended particulate matter sampling device needs to be carried out in time periods, which requires constant replacement of new membranes to meet the sampling requirements of time-divided sampling; if only manual membrane replacement is relied upon, the operation and maintenance frequency will be greatly increased, and the equipment operating cost will be increased.

[0004] In order to solve the above technical problems, some manufacturers have developed automatic membrane replacement devices suitable for suspended particulate matter sampling devices. For example, patent number CN108043138A, patent name is invention patent for automatic membrane replacement device, in which the device includes a driving mechanism, a cam mechanism, a Maltese cross movement, a turntable, a sampling clamping mechanism and a filter membrane lifting mechanism; wherein, the Maltese and top membrane transverse axes are located on the same side of the cam mechanism in the radial direction, the lifting transverse axis is located on the other side of the cam mechanism in the radial direction, and the upper cam presses the lifting transverse axis, and the lower cam presses the top membrane transverse axis, so that when the upper cam and the lower cam rotate one circle driven by the motor, the vent tube can move from the lifting position to the lowering position and then to the lifting position, and at the same time, the top membrane shaft can also move from the top membrane position to the lowering position and then to the top membrane position, and when the vent tube starts to enter the lowering position and the top membrane shaft starts to enter the lowering position, the pin can enter the Maltese slot, thereby triggering the Maltese rotation to drive the turntable to rotate 90° to complete the membrane replacement. However, the above structure is too large and the corresponding mechanical mechanism is too complicated, resulting in high cost. Moreover, there is no closed structure between the air inlet and the air outlet, which is greatly affected by environmental factors in outdoor environments and cannot obtain a more accurate suspended particulate matter content.

[0005] Therefore, how to design a suspended particulate matter sampling device that has a simple structure, low cost, is not affected by the external environment, and can automatically replace the membrane is an urgent problem that needs to be solved by technical personnel in this field. Summary of the Invention

[0006] The present invention provides an automatic membrane replacement structure, which solves the technical problems of the existing automatic membrane replacement device of the suspended particulate matter sampling device being complex in structure, high in cost and affected by the external environment.

[0007] The present invention solves the above technical problems with the following technical solutions: an automatic film changing structure, comprising: a support plate, a first lifting mechanism, a second lifting mechanism and a swinging film changing mechanism.

[0008] The support plate is provided with old membrane holes, working holes and new membrane holes at intervals, and membrane support racks are placed in the old membrane holes and the new membrane holes, and filter membranes are placed on the membrane support racks; the first lifting mechanism and the second lifting mechanism are both located below the support plate, and their lifting ends both move back and forth along the vertical direction of the support plate, and the lifting end of the first lifting mechanism movably extends into the working hole and its top end touches the bottom end of the filter membrane in the working hole; the lifting end of the second lifting mechanism movably extends into the new membrane hole and its top end touches the bottom end of the corresponding membrane support rack; the swing membrane changing mechanism includes a swing motor, a swing rod and a membrane changing ring, the swing motor is fixed on the support plate and its output shaft rotates with the vertical direction as the axis; the swing rod is located parallel to the above the support plate and one end of it is fixed to the output shaft of the swing motor; the membrane changing ring is located parallel to the above the support plate and its outer ring wall is fixed to the other end of the swing rod, and the membrane changing ring can be arranged relative to the old membrane hole, the working hole and the new membrane hole respectively as the swing rod swings.

[0009] The beneficial effects of the present invention are as follows: the mechanical structure of the traditional automatic membrane changing device is simplified, and the swinging membrane changing ring is arranged relative to the old membrane hole, the working hole and the new membrane hole respectively. When the filter membrane in the working hole has been used for a long time and needs to be replaced, the membrane supporting frame and the filter membrane on it in the working hole can be lowered by the lifting end of the first lifting mechanism (in the initial state, the lifting end of the first lifting mechanism lifts the filter membrane in use upward and is located above the working hole), so that the membrane changing ring can transfer the old filter membrane on the membrane supporting frame into the old membrane hole to complete the removal of the old membrane; then the lifting end of the second lifting mechanism is used to lift the membrane supporting frame and the filter membrane on it in the new membrane hole (in the initial state, the new membrane supporting frame and the filter membrane on it are located in the new membrane hole), so that the membrane changing ring can transfer the new filter membrane on the new membrane supporting frame into the working hole to complete the installation of the new membrane; finally, the lifting end of the first lifting mechanism is used to lift the filter membrane in the working hole to restore the initial working state; the above-mentioned membrane changing structure is simple, the membrane changing action is closely connected, not only the membrane changing efficiency is high, but also the error rate is low, and it has great promotion value;

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, it also includes a third lifting mechanism, which is located below the support plate and its lifting end moves back and forth along the vertical direction. The lifting end of the third lifting mechanism is movable and extends into the old film hole and its top end touches the bottom end of the corresponding film support frame.

[0012] The above method has the further beneficial effect that the top end of the lifting end of the third lifting mechanism is in contact with the bottom end of the membrane support frame, so that the membrane support frame and the filter membrane thereon can be slowly lowered, thereby avoiding the membrane support frame and the filter membrane from descending too quickly and preventing the filter membrane from being damaged.

[0013] Furthermore, it also includes a membrane storage assembly, which includes a new membrane cylinder and an old membrane cylinder, the new membrane cylinder is arranged along the vertical direction and its top end is inserted into the new membrane hole, and the side wall of the new membrane cylinder is provided with a long strip of through-hole A along its axial direction; the old membrane cylinder is arranged parallel to the new membrane cylinder and its top end is inserted into the old membrane hole, and the side wall of the old membrane cylinder is provided with a long strip of through-hole B along its axial direction; the membrane support frame is slid in the new membrane cylinder and the old membrane cylinder along its axial direction, and a plurality of filter membranes are stacked on the membrane support frame; the second lifting mechanism is located on one side of the new membrane cylinder and its lifting end moves through the through-hole A to touch the bottom end of the corresponding membrane support frame; the third lifting mechanism is located on one side of the old membrane cylinder and its lifting end moves through the through-hole B to touch the bottom end of the corresponding membrane support frame.

[0014] The further beneficial effect of the above method is: first the membrane support frame and the new filter membrane thereon are stored in the new membrane cylinder, and then the membrane support frame and the old filter membrane thereon are stored in the old membrane cylinder, which can automatically complete multiple membrane replacement operations and extend the service life of the automatic membrane replacement device.

[0015] Furthermore, the second lifting mechanism and the third lifting mechanism have the same structure and both include a fixed plate, a lifting motor, a lead screw, a lifting slider and a support plate. The fixed plate of the second lifting mechanism is located on one side of the new film cylinder; the fixed plate of the third lifting mechanism is located on one side of the old film cylinder; the lifting motor is fixed on the fixed plate and its output shaft rotates about the vertical line; the lead screw is arranged along the vertical line direction and its bottom end is fixed to the output shaft of the lifting motor; the lifting slider is provided with a threaded hole and is threadedly connected to the lead screw; the support plate is fixed to the lifting slider; the support plate of the second lifting mechanism is the lifting end of the second lifting mechanism and moves through the through-hole A to touch the bottom end of the corresponding film support frame; the support plate of the third lifting mechanism is the lifting end of the third lifting mechanism and moves through the through-hole B to touch the bottom end of the corresponding film support frame.

[0016] Furthermore, the first lifting mechanism includes an electric telescopic rod and a lifting rod, the electric telescopic rod is located below the support plate and its telescopic end moves back and forth along the vertical direction; the lifting rod is the lifting end of the first lifting mechanism, the lifting rod is arranged along the vertical direction and its bottom end is fixed on the telescopic end of the electric telescopic rod, the lifting rod slides into the working hole and its top end touches the bottom end of the filter membrane in the working hole.

[0017] Furthermore, it also includes a positioning and identification mechanism, which includes a first photoelectric sensor, a second photoelectric sensor and a third photoelectric sensor. The first photoelectric sensor is fixed on the support plate at a side corresponding to the old membrane hole; the second photoelectric sensor is fixed on the support plate at a side corresponding to the working hole; the third photoelectric sensor is fixed on the support plate at a side corresponding to the new membrane hole; the swinging membrane changing mechanism also includes a light blocking plate, which is fixed on the outer side wall of the membrane changing ring and can be arranged opposite to the first photoelectric sensor, the second photoelectric sensor and the third photoelectric sensor respectively.

[0018] A further beneficial effect of the above-mentioned method is that the light blocking plate is arranged relative to the first photoelectric sensor, the second photoelectric sensor and the third photoelectric sensor respectively as the membrane changing ring moves, so that the position of the membrane changing ring and the old membrane hole, the working hole and the new membrane hole can be automatically aligned, thereby improving the accuracy and efficiency of membrane changing.

[0019] In addition, a suspended particulate matter filtering device is provided, comprising: a chassis, an end cover, the automatic membrane changing device and an analyzer, wherein the top surface of the chassis is provided with a fixing hole; the end cover is fixed in the fixing hole and is provided with an air inlet arranged opposite to the working hole; the support plate is fixed in the chassis along a height direction perpendicular to the chassis and divides the interior of the chassis into an upper membrane changing area and a lower working area; the first lifting mechanism and the second lifting mechanism are both located in the working area and are both fixed to the inner bottom surface of the chassis, the top end of the lifting end of the first lifting mechanism is provided with a ventilation blind hole and its side wall is provided with an air outlet communicated with the ventilation blind hole; the swing rod and the membrane changing ring are both located in the membrane changing area; the analyzer is located in the chassis and its air inlet is communicated with the air outlet.

[0020] The further beneficial effect of adopting the above method is: the automatic membrane replacement device is installed inside the suspended particle sampling device to automatically complete the membrane replacement, which can meet the membrane replacement requirements of the suspended particle sampler's time-sharing sampling, reduce manual membrane replacement intervention, avoid external environmental influences, and improve sampling accuracy.

[0021] Furthermore, the swinging membrane-changing mechanism also includes a closed ring, which is located in the membrane-changing area and is sleeved on the outer peripheral side of the membrane-changing ring. The ring wall of the closed ring is provided with a plug-in hole and is sleeved on the rod wall of the swinging rod. The top surface of the closed ring can slide in contact with the bottom surface of the end cover as the swinging rod swings, and its bottom surface slides in contact with the top surface of the support plate.

[0022] The further beneficial effect of adopting the above method is: first, the top surface of the closed ring is brought into sliding contact with the bottom surface of the end cover, and then the bottom end of the closed ring is brought into sliding contact with the top surface of the support plate, which can prevent the gas entering the air inlet from entering the working area through the new membrane hole or the old membrane hole, prevent the external environment from affecting the sampling results, and improve the sampling accuracy.

[0023] Furthermore, it also includes a first transparent plate and a second transparent plate, and the top surface of the chassis is provided with an old film observation hole and a new film observation hole, the old film observation hole is opposite to the old film hole, and the new film observation hole is opposite to the new film hole; the first transparent plate is fixed in the old film observation hole; the second transparent plate is fixed in the new film observation hole.

[0024] A further beneficial effect of the above method is that the storage conditions in the old membrane cylinder and the new membrane cylinder can be visually observed through the first transparent plate and the second transparent plate, making it convenient to take out the old filter membrane or place the new filter membrane.

[0025] Furthermore, it also includes a switch door, a switch lock and a rocker. The side of the chassis is provided with a switch hole and the upper hole wall and the lower hole wall of the switch hole are both provided with lock holes; the switch door is hinged at the switch hole and a connecting hole is provided in the middle thereof; the switch lock includes a connecting disk, a rotating plate, two linked sliding rods, two guide blocks and two locking rods, and the connecting disk is rotatably connected in the connecting hole; one plate surface of the rotating plate is fixed parallel to the inner plate surface of the connecting disk and is provided with two arc holes arranged oppositely, and the arc directions of the two arc holes are arranged along the rotation direction of the connecting disk. The two linkage slide bars slide in the two arc-shaped holes respectively; the two guide blocks are respectively located above and below the rotating plate and fixed on the inner side surface of the switch door, and the two guide blocks are provided with guide slide holes arranged opposite to the lock holes; the two lock rods slide in the two guide slide holes respectively and are respectively fixed on the two linkage slide bars, and the two lock rods move out of the corresponding guide slide holes and insert into the corresponding lock holes as the two linkage slide bars slide; one end of the rocker is fixed on the outer disk surface of the connecting disk.

[0026] The above-mentioned further beneficial effect is: rotating the rocker drives the connecting plate to rotate. Since the rotating plate is fixed on the connecting plate, the rotating plate can be driven to rotate. Since the linkage slide rod slides in the arc-shaped hole of the rotating plate and the lock rod is fixed on the linkage slide rod, the lock rod can be driven to slide out of the corresponding guide slide hole and insert into the corresponding lock hole to complete the locking action of opening and closing the door, and vice versa to complete the unlocking action. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a front perspective structural diagram of a suspended particulate matter filtering device according to the present invention;

[0028] Figure 2 This is a rear perspective structural diagram of an automatic film changing structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the assembly structure of the second lifting mechanism and the new film cylinder in an automatic film replacement structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the split structure of the second lifting mechanism and the new film cylinder in an automatic film replacement structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of the second lifting mechanism in an automatic film changing structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the three-dimensional structure of a first lifting mechanism in an automatic film changing structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the internal structure of a suspended particulate matter filtering device of the present invention;

[0034] Figure 8 The figure is a schematic diagram of the three-dimensional structure of the switch door, switch lock and rocker in a suspended particulate matter filtering device of the present invention.

[0035] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0036] 1. Support plate, 11. Old membrane hole, 12. Working hole, 13. New membrane hole, 2. First lifting mechanism, 21. Electric telescopic rod, 22. Lifting rod, 23. Ventilation blind hole, 24. Air outlet, 3. Second lifting mechanism, 4. Swinging membrane replacement mechanism, 41. Swinging rod, 42. Membrane replacement ring, 5. Film support frame, 6. Third lifting mechanism, 7. Membrane storage assembly, 71. New membrane cylinder, 711. Perforation A, 72. Old membrane cylinder, 8. Fixed plate, 9. Lifting motor, 10 , screw, 14, lifting slider, 15, support plate, 16, first photoelectric sensor, 17, second photoelectric sensor, 18, third photoelectric sensor, 19, chassis, 20, end cover, 201, air inlet, 25, first transparent plate, 26, second transparent plate, 27, switch door, 28, switch lock, 281, connecting plate, 282, rotating plate, 2821, arc hole, 283, linkage slide rod, 284, guide block, 285, lock rod, 29, rocker. DETAILED DESCRIPTION

[0037] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0038] like Figure 2 As shown, an automatic film changing structure includes: a support plate 1, a first lifting mechanism 2, a second lifting mechanism 3 and a swing film changing mechanism 4.

[0039] The support plate 1 is provided with old membrane holes 11, working holes 12 and new membrane holes 13 at intervals. A membrane support frame 5 is placed in the old membrane holes 11 and the new membrane holes 13, and a filter membrane is placed on the membrane support frame 5; the first lifting mechanism 2 and the second lifting mechanism 3 are both located below the support plate 1 and their lifting ends move back and forth along the vertical direction of the support plate 1, the lifting end of the first lifting mechanism 2 is movably extended into the working hole 12 and its top end touches the bottom end of the filter membrane in the working hole 12; the lifting end of the second lifting mechanism 3 is movably extended into the new membrane hole 13 and its top end touches At the bottom end of the corresponding film support frame 5; the swinging membrane changing mechanism 4 includes a swinging motor, a swinging rod 41 and a membrane changing ring 42, the swinging motor is fixed on the support plate 1 and its output shaft rotates with the vertical direction as the axis; the swinging rod 41 is located above the support plate 1 in parallel and one end of which is fixed to the output shaft of the swinging motor; the membrane changing ring 42 is located above the support plate 1 in parallel and its outer ring wall is fixed to the other end of the swinging rod 41, and the membrane changing ring 42 can be arranged relative to the old membrane hole 11, the working hole 12 and the new membrane hole 13 respectively as the swinging rod 41 swings.

[0040] In some specific embodiments, a third lifting mechanism 6 may also be included. The third lifting mechanism 6 is located below the support plate 1 and its lifting end moves back and forth along the vertical direction. The lifting end of the third lifting mechanism 6 is movable and extends into the old film hole 11 and its top end touches the bottom end of the corresponding film support frame 5.

[0041] In some specific embodiments, a membrane storage assembly 7 may also be included, which includes a new membrane cylinder 71 and an old membrane cylinder 72. The new membrane cylinder 71 is arranged along the vertical direction and its top end is inserted into the new membrane hole 13. The side wall of the new membrane cylinder 71 is provided with a long strip of through-hole A711 along its axial direction; the old membrane cylinder 72 is arranged parallel to the new membrane cylinder 71 and its top end is inserted into the old membrane hole 11. The side wall of the old membrane cylinder 72 is provided with a long strip of through-hole B along its axial direction; a membrane support frame 5 is sliding in the new membrane cylinder 71 and the old membrane cylinder 72 along its axial direction, and a plurality of filter membranes are stacked on the membrane support frame 5; the second lifting mechanism 3 is located on one side of the new membrane cylinder 71 and its lifting end moves through the through-hole A711 to touch the bottom end of the corresponding membrane support frame 5; the third lifting mechanism 6 is located on one side of the old membrane cylinder 72 and its lifting end moves through the through-hole B to touch the bottom end of the corresponding membrane support frame 5.

[0042] In some specific embodiments, the second lifting mechanism 3 and the third lifting mechanism 6 have the same structure and both include a fixed plate 8, a lifting motor 9, a screw 10, a lifting slider 14 and a support plate 15. The fixed plate 8 of the second lifting mechanism 3 is located on one side of the new film cylinder 71; the fixed plate 8 of the third lifting mechanism 6 is located on one side of the old film cylinder 72; the lifting motor 9 is fixed on the fixed plate 8 and its output shaft rotates about the vertical line; the screw 10 is arranged along the vertical direction and its bottom end is fixed on the output shaft of the lifting motor 9; the lifting slider 14 is provided with a threaded hole and is threadedly connected to the screw 10; the support plate 15 is fixed on the lifting slider 14; the support plate 15 of the second lifting mechanism 3 is the lifting end of the second lifting mechanism 3 and moves through the perforation A711 to touch the bottom end of the corresponding film support frame 5; the support plate 15 of the third lifting mechanism 6 is the lifting end of the third lifting mechanism 6 and moves through the perforation B to touch the bottom end of the corresponding film support frame 5.

[0043] In some specific embodiments, the first lifting mechanism 2 may include an electric telescopic rod 21 and a lifting rod 22. The electric telescopic rod 21 is located below the support plate 1 and its telescopic end moves back and forth along the vertical direction; the lifting rod 22 is the lifting end of the first lifting mechanism 2. The lifting rod 22 is arranged along the vertical direction and its bottom end is fixed on the telescopic end of the electric telescopic rod 21. The lifting rod 22 slides into the working hole 12 and its top end touches the bottom end of the filter membrane in the working hole 12.

[0044] In some specific embodiments, a positioning and identification mechanism may also be included, which includes a first photoelectric sensor 16, a second photoelectric sensor 17 and a third photoelectric sensor 18. The first photoelectric sensor 16 is fixed on the support plate 1 at a side corresponding to the old membrane hole 11; the second photoelectric sensor 17 is fixed on the support plate 1 at a side corresponding to the working hole 12; the third photoelectric sensor 18 is fixed on the support plate 1 at a side corresponding to the new membrane hole 13; the swinging membrane changing mechanism 4 also includes a light shielding plate, which is fixed on the outer wall of the membrane changing ring 42 and can be arranged opposite to the first photoelectric sensor 16, the second photoelectric sensor 17 and the third photoelectric sensor 18 respectively.

[0045] In addition, a suspended particulate matter filtering device is provided, including: a chassis 19, an end cover 20, an automatic membrane changing device and an analyzer, the top surface of the chassis 19 is provided with a fixing hole; the end cover 20 is fixed in the fixing hole and is provided with an air inlet 201 arranged opposite to the working hole 12; the support plate 1 is fixed in the chassis 19 along the height direction perpendicular to the chassis 19 and divides the interior of the chassis 19 into an upper membrane changing area and a lower working area; the first lifting mechanism 2 and the second lifting mechanism 3 are both located in the working area and are both fixed on the inner bottom surface of the chassis 19, the top of the lifting end of the first lifting mechanism 2 is provided with a ventilation blind hole 23 and its side wall is provided with an air outlet 24 communicated with the ventilation blind hole 23; the swing rod 41 and the membrane changing ring 42 are both located in the membrane changing area; the analyzer is located in the chassis 19 and its air inlet is communicated with the air outlet 24.

[0046] In some specific embodiments, the swinging membrane changing mechanism 4 may further include a closed ring, which is located in the membrane changing area and is sleeved on the outer peripheral side of the membrane changing ring 42. The ring wall of the closed ring is provided with a plug hole and is sleeved on the rod wall of the swing rod 41. The top surface of the closed ring can slide in contact with the bottom surface of the end cover 20 as the swing rod 41 swings, and its bottom surface slides in contact with the top surface of the support plate 1.

[0047] In some specific embodiments, a first transparent plate 25 and a second transparent plate 26 are further included. The top surface of the chassis 19 is provided with an old membrane observation hole and a new membrane observation hole. The old membrane observation hole is opposite to the old membrane hole 11, and the new membrane observation hole is opposite to the new membrane hole 13; the first transparent plate 25 is fixed in the old membrane observation hole; the second transparent plate 26 is fixed in the new membrane observation hole.

[0048] In some specific embodiments, a switch door 27, a switch lock 28 and a rocker 29 may also be included. A switch hole is provided on the side of the chassis 19 and lock holes are provided on the upper and lower hole walls of the switch hole; the switch door 27 is hinged at the switch hole and a connecting hole is provided in the middle thereof; the switch lock 28 includes a connecting disk 281, a rotating plate 282, two linkage slide rods 283, two guide blocks 284 and two locking rods 285, the connecting disk 281 is rotatably connected in the connecting hole; one plate surface of the rotating plate 282 is fixed parallel to the inner disk surface of the connecting disk 281 and is provided with two arc-shaped holes 2821 arranged oppositely, and the arc-shaped squares of the two arc-shaped holes 2821 are provided. The two linkage slides 283 slide in the two arc-shaped holes 2821 respectively; the two guide blocks 284 are respectively located above and below the rotating plate 282 and fixed on the inner side of the switch door 27, and the two guide blocks 284 are provided with guide sliding holes arranged opposite to the lock holes; the two locking rods 285 slide in the two guide sliding holes respectively and are respectively fixed on the two linkage slides 283, and the two locking rods 285 move out of the corresponding guide sliding holes and insert into the corresponding lock holes as the two linkage slides 283 slide; one end of the rocker 29 is fixed on the outer disk surface of the connecting disk 281.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A suspended particulate matter filtering device, characterized in that: include: A chassis (19), an end cover (20), an automatic membrane replacement structure and an analyzer, wherein the automatic membrane replacement structure comprises: A support plate (1), wherein old membrane holes (11), working holes (12) and new membrane holes (13) are provided on the support plate (1), and a membrane support frame (5) is placed in each of the old membrane holes (11) and the new membrane holes (13), and a filter membrane is placed on each of the membrane support frames (5); A first lifting mechanism (2) and a second lifting mechanism (3), wherein the first lifting mechanism (2) and the second lifting mechanism (3) are both located below the support plate (1) and their lifting ends both move back and forth along the vertical direction of the support plate (1); the lifting end of the first lifting mechanism (2) movably extends into the working hole (12) and its top end touches the bottom end of the filter membrane in the working hole (12); the lifting end of the second lifting mechanism (3) movably extends into the new membrane hole (13) and its top end touches the bottom end of the corresponding membrane support frame (5); A swinging membrane-changing mechanism (4), the swinging membrane-changing mechanism (4) comprising a swinging motor, a swinging rod (41) and a membrane-changing ring (42), the swinging motor being fixed on the support plate (1) and having an output shaft thereof rotating about the vertical direction as an axis; the swinging rod (41) being located above the support plate (1) in parallel and having one end thereof fixed to the output shaft of the swinging motor; the membrane-changing ring (42) being located above the support plate (1) in parallel and having an outer ring wall thereof fixed to the other end of the swinging rod (41), the membrane-changing ring (42) being arranged relative to the old membrane hole (11), the working hole (12) and the new membrane hole (13) respectively as the swinging rod (41) swings; The top surface of the chassis (19) is provided with a fixing hole; the end cover (20) is fixed in the fixing hole and is provided with an air inlet (201) arranged opposite to the working hole (12); the support plate (1) is fixed in the chassis (19) along the height direction perpendicular to the chassis (19) and divides the interior of the chassis (19) into an upper membrane replacement area and a lower working area; the first lifting mechanism (2) and the second lifting mechanism (3) are both located in the working area and are both fixed to the inner bottom surface of the chassis (19); the top end of the lifting end of the first lifting mechanism (2) is provided with a ventilation blind hole (23) and its side wall is provided with an air outlet (24) communicating with the ventilation blind hole (23); the swing rod (41) and the membrane replacement ring (42) are both located in the membrane replacement area; the analyzer is located in the chassis (19) and its air inlet is communicated with the air outlet (24); The swing membrane-changing mechanism (4) further comprises a closed ring, the closed ring being located in the membrane-changing area and sleeved on the outer circumference of the membrane-changing ring (42), a plug-in hole being provided on the ring wall of the closed ring and being sleeved on the rod wall of the swing rod (41), the top surface of the closed ring being in sliding contact with the bottom surface of the end cover (20) as the swing rod (41) swings, and the bottom surface of the closed ring being in sliding contact with the top surface of the support plate (1); It also includes a first transparent plate (25) and a second transparent plate (26), and the top surface of the chassis (19) is provided with an old film observation hole and a new film observation hole, the old film observation hole is opposite to the old film hole (11), and the new film observation hole is opposite to the new film hole (13); the first transparent plate (25) is fixed in the old film observation hole; the second transparent plate (26) is fixed in the new film observation hole.

2. A suspended particulate matter filtering device according to claim 1, characterized in that: It also includes a third lifting mechanism (6), which is located below the support plate (1) and has a lifting end that moves back and forth along the vertical direction. The lifting end of the third lifting mechanism (6) is movable and extends into the old film hole (11) and its top end touches the bottom end of the corresponding film support frame (5).

3. A suspended particulate matter filtering device according to claim 2, characterized in that: It also includes a membrane storage component (7), the membrane storage component (7) includes a new membrane cylinder (71) and an old membrane cylinder (72), the new membrane cylinder (71) is arranged along the vertical direction and its top end is inserted and fixed in the new membrane hole (13), and the side wall of the new membrane cylinder (71) is provided with a long strip of through-hole A (711) along its axial direction; the old membrane cylinder (72) is arranged parallel to the new membrane cylinder (71) and its top end is inserted and fixed in the old membrane hole (11), and the side wall of the old membrane cylinder (72) is provided with a long strip of through-hole B along its axial direction; The film support frame (5) slides along the axial direction inside the new film cylinder (71) and the old film cylinder (72), and a plurality of filter membranes are stacked on the film support frame (5); the second lifting mechanism (3) is located on one side of the new film cylinder (71) and its lifting end moves through the perforation A (711) and touches the bottom end of the corresponding film support frame (5); the third lifting mechanism (6) is located on one side of the old film cylinder (72) and its lifting end moves through the perforation B and touches the bottom end of the corresponding film support frame (5).

4. A suspended particulate matter filtering device according to claim 3, characterized in that: The second lifting mechanism (3) and the third lifting mechanism (6) have the same structure and both include a fixed plate (8), a lifting motor (9), a lead screw (10), a lifting slider (14) and a support plate (15). The fixed plate (8) of the second lifting mechanism (3) is located on one side of the new film cylinder (71); the fixed plate (8) of the third lifting mechanism (6) is located on one side of the old film cylinder (72); the lifting motor (9) is fixed on the fixed plate (8) and its output shaft rotates with the vertical line as the axis; the lead screw (10) is arranged along the vertical line direction and its bottom end is fixed on On the output shaft of the lifting motor (9); a threaded hole is provided on the lifting slider (14) and is threadedly connected to the lead screw (10); the support plate (15) is fixed on the lifting slider (14); the support plate (15) of the second lifting mechanism (3) is the lifting end of the second lifting mechanism (3) and moves through the through hole A (711) to touch the bottom end of the corresponding film support frame (5); the support plate (15) of the third lifting mechanism (6) is the lifting end of the third lifting mechanism (6) and moves through the through hole B to touch the bottom end of the corresponding film support frame (5).

5. The suspended particulate matter filtering device according to claim 1, characterized in that: The first lifting mechanism (2) comprises an electric telescopic rod (21) and a lifting rod (22), wherein the electric telescopic rod (21) is located below the support plate (1) and its telescopic end reciprocates along the vertical direction; the lifting rod (22) is the lifting end of the first lifting mechanism (2), the lifting rod (22) is arranged along the vertical direction and its bottom end is fixed to the telescopic end of the electric telescopic rod (21), and the lifting rod (22) slides into the working hole (12) and its top end contacts the bottom end of the filter membrane in the working hole (12).

6. The suspended particulate matter filtering device according to claim 1, characterized in that: The invention also includes a positioning and identifying mechanism, which includes a first photoelectric sensor (16), a second photoelectric sensor (17) and a third photoelectric sensor (18), wherein the first photoelectric sensor (16) is fixed on the support plate (1) at a side corresponding to the old membrane hole (11); the second photoelectric sensor (17) is fixed on the support plate (1) at a side corresponding to the working hole (12); and the third photoelectric sensor (18) is fixed on the support plate (1) at a side corresponding to the new membrane hole (13); and the swinging membrane changing mechanism (4) also includes a light shielding plate, which is fixed on the outer side wall of the membrane changing ring (42) and can be arranged opposite to the first photoelectric sensor (16), the second photoelectric sensor (17) and the third photoelectric sensor (18), respectively.

7. The suspended particulate matter filtering device according to claim 1, characterized in that: The invention also includes a switch door (27), a switch lock (28) and a rocker (29), wherein a switch hole is provided on the side of the chassis (19) and the upper hole wall and the lower hole wall of the switch hole are both provided with lock holes; the switch door (27) is hinged at the switch hole and a connecting hole is provided in the middle thereof; the switch lock (28) includes a connecting disk (281), a rotating plate (282), two linked slide bars (283), two guide blocks (284) and two lock bars (285), wherein the connecting disk (281) is rotatably connected in the connecting hole; a plate surface of the rotating plate (282) is fixed parallel to the inner plate surface of the connecting disk (281) and is provided with two arc holes (2821) arranged opposite to each other, and the arc directions of the two arc holes (2821) are both along the connecting disk (281). 81); the two linkage slide bars (283) slide in the two arc-shaped holes (2821) respectively; the two guide blocks (284) are respectively located above and below the rotating plate (282) and fixed on the inner side surface of the switch door (27), and the two guide blocks (284) are provided with guide sliding holes arranged opposite to the lock holes; the two locking rods (285) slide in the two guide sliding holes and are respectively fixed on the two linkage slide bars (283), and the two locking rods (285) move out of the corresponding guide sliding holes and insert into the corresponding lock holes as the two linkage slide bars (283) slide; one end of the rocker (29) is fixed on the outer disk surface of the connecting disk (281).

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