Automatic film changing device

Abstract

The invention discloses an automatic film changing device which comprises a machine box, a pressing unit, a film feeding unit, an air guiding unit and an electric control unit are arranged in the machine box, and the pressing unit, the film feeding unit and the air guiding unit are connected with the electric control unit. The pressing unit comprises a first pressing mechanism and a second pressing mechanism, a power mechanism is arranged between the first pressing mechanism and the second pressing mechanism, so that the first pressing mechanism and the second pressing mechanism are opened or closed through the power mechanism, and the film conveying unit comprises a driving wheel, a driven wheel, a guide wheel and a counting wheel. A filter membrane is arranged between the driving wheel and the driven wheel and penetrates through a gap between the first pressing mechanism and the second pressing mechanism. According to the invention, the paper tape can be moved regularly, unmanned maintenance is realized, and the effect of no maintenance for more than two years on the particulate matter filtering function can be realized according to the updating frequency of the conventional filter membrane.

Description

Technical Field

[0001] The invention relates to an environmental air monitoring technology, in particular to an automatic membrane changer. Background Art

[0002] Gaseous monitoring is a basic component of ambient air monitoring. When monitoring gaseous pollutants, the sample gas needs to be filtered to remove particulate matter in the sample gas. Conventional air stations use sheet filters to filter the sample gas, which requires regular manual replacement of the filter membrane, making maintenance more troublesome.

[0003] In recent years, as the quantity and quality of demand for automated equipment for environmental monitoring have continued to increase, air stations need more convenient sampling and purification equipment. However, the contradiction between the manual membrane replacement maintenance method and the increasingly intelligent monitoring stations has gradually emerged. Therefore, current air monitoring needs to develop an automated membrane replacement device while ensuring the effectiveness of sampling.

[0004] In current gaseous substance monitoring, circular sheet filters are commonly used for sample gas purification, and the filter membranes are replaced every one to two weeks. Replacing the filter membrane requires manual operation, and the maintenance cost is high. In addition, manual operation has a certain possibility of error, such as the filter membrane is placed offset, the filter membrane box is not tightened, and other problems. Summary of the invention

[0005] In order to solve the above-mentioned deficiencies in the prior art, the object of the present invention is to provide an automatic film changer, which can move the paper tape regularly to achieve unmanned maintenance.

[0006] The technical solution adopted by the present invention to solve the technical problem is: an automatic film changer, comprising a chassis, wherein a pressing unit, a film moving unit, an air guiding unit and an electric control unit are arranged in the chassis, and the pressing unit, the film moving unit and the air guiding unit are respectively connected to the electric control unit;

[0007] The clamping unit includes a first clamping mechanism and a second clamping mechanism, and a power mechanism is provided between the first clamping mechanism and the second clamping mechanism, so that the first clamping mechanism and the second clamping mechanism are opened or closed by the power mechanism; and when the first clamping mechanism and the second clamping mechanism are opened, the film-moving unit moves under the control of the electronic control unit, and when the first clamping mechanism and the second clamping mechanism are closed, the film-moving unit stops moving under the control of the electronic control unit;

[0008] The film-moving unit comprises a driving wheel, a driven wheel, a guide wheel and a counting wheel, a filter membrane is arranged between the driving wheel and the driven wheel, and the filter membrane passes through a gap between the first pressing mechanism and the second pressing mechanism;

[0009] The electronic control unit includes a control chip and a first sensor component and a second sensor component. The first sensor component is adapted to the pressing unit, and the second sensor component is adapted to the film moving unit.

[0010] Optionally, the interior of the chassis is divided into a first space and a second space by a partition, wherein the compression unit, the film moving unit and the air guiding unit are arranged in the first space, and the electronic control unit is arranged in the second space.

[0011] Optionally, the first clamping mechanism includes a movable clamp and a pressure rod, the movable clamp is installed at the bottom of the pressure rod, and the pressure rod is hinged to the surface of the partition, so that the pressure rod can rotate along a plane parallel to the surface of the partition.

[0012] Optionally, the power mechanism includes an eccentric wheel and a spring, the bottom of the spring is fixedly connected to the top of the pressure rod, and the top of the spring is in contact with the inner top wall of the chassis, so that the spring is in a compressed state;

[0013] The eccentric wheel is arranged below the pressure rod, and the rim of the eccentric wheel is in contact with the pressure rod, so that the pressure rod generates a rotational motion under the action of the eccentric wheel.

[0014] Optionally, the second pressing mechanism includes a fixed clamp, which is fixedly mounted on the surface of the partition, and the movable clamp cooperates with the fixed clamp when it moves to the lowest position, so that the filter membrane is clamped and pressed between the movable clamp and the fixed clamp;

[0015] A sealing ring is also installed on the surface of the fixing clip.

[0016] Optionally, the air guide unit includes an air inlet seat, an air inlet pipe, a movable clamp support, a fixed clamp support, an air outlet pipe and an air outlet seat; wherein the air inlet seat is fixedly mounted on the inner top wall of the chassis, the air outlet seat is fixedly mounted on the inner bottom wall of the chassis, the movable clamp support is fixedly mounted in the movable clamp, and the fixed clamp support is fixedly mounted in the fixed clamp;

[0017] One end of the air intake pipe is connected to the sampling main pipe, and the other end is fixedly connected to the movable clamping support, and the air intake pipe is connected to the air intake seat through the air intake joint;

[0018] One end of the air outlet pipe is connected to the analyzer, and the other end is fixedly connected to the fixed clamp support, and the air outlet pipe is connected to the air outlet seat through the air outlet joint.

[0019] Optionally, the first sensing component includes a first photoelectric switch and a baffle fixedly mounted on the surface of the eccentric wheel, the rotation center of the baffle coincides with the rotation center of the eccentric wheel, and the outer edge of the baffle extends out of the rim of the eccentric wheel, so that the baffle is clamped in the first photoelectric switch.

[0020] Optionally, the second sensing assembly includes a second photoelectric switch and a wheel disc, the wheel disc is clamped in the second photoelectric switch, and a plurality of counting holes are provided on the wheel disc, the axes of the counting holes coincide with the optical axis of the light beam of the second photoelectric switch, and the wheel disc is fixedly installed in the counting wheel;

[0021] The plurality of counting holes are distributed along a circumference, and the center of the circumference coincides with the center of the wheel disc.

[0022] This design uses automatic control to replace manual membrane replacement, roll-type filter membrane to replace sheet filter membrane, mobile filter belt to achieve the effect of updating filter membrane, motor drive structure as the way to perform membrane replacement, with the characteristics of convenience and maintenance-free, and can retain the high efficiency of the filter membrane. This design has multiple airflow outlets, and one device can meet the monitoring needs of multiple components of the air station. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the whole machine of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the pressing unit of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the membrane walking unit of the present invention;

[0026] Figure 4 is a schematic structural diagram of an air guide unit of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the electronic control unit of the present invention. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] like Figure 1As shown, the present invention discloses an automatic film changer, including a chassis 100, wherein a pressing unit 200, a film moving unit 300, an air guiding unit 400 and an electric control unit 500 are arranged in the chassis 100, wherein the pressing unit 200, the film moving unit 300 and the air guiding unit 400 are respectively connected to the electric control unit 500, so that the electric control unit 500 can control and operate each part. In the present invention, the interior of the chassis 100 is divided into a first space and a second space by a partition 110, the pressing unit 200, the film moving unit 300 and the air guiding unit 400 are all installed in the first space, and the electric control unit 500 is installed in the second space, and the interior of the chassis 100 is divided into two independent spaces by the partition 110, which can effectively isolate the electric control unit 500 from affecting the operation of other units, and in addition, the partition 110 can also serve as a fixed platform for the pressing unit 200, the film moving unit 300 and the air guiding unit 400, and play a supporting and fixing role for them.

[0031] In the present invention, if Figure 1 and Figure 2 As shown, the clamping unit 200 includes a first clamping mechanism 210 and a second clamping mechanism 220, and a power mechanism 230 is provided between the first clamping mechanism 210 and the second clamping mechanism 220. The power mechanism 230 causes relative movement between the first clamping mechanism 210 and the second clamping mechanism 220, thereby opening or closing the clamping unit 200. Furthermore, when the first clamping mechanism 210 and the second clamping mechanism 220 are opened, the film-moving unit 300 moves under the control of the electric control unit 500, and when the first clamping mechanism 210 and the second clamping mechanism 220 are closed, the film-moving unit 300 stops moving under the control of the electric control unit 500.

[0032] In one embodiment of the present invention, the first clamping mechanism 210 can be used as an active clamping end, and the second clamping mechanism 220 can be used as a passive clamping end. In this embodiment, the first clamping mechanism 210 is connected to the power mechanism 230 to obtain the power provided by the power mechanism 230 to produce an up and down movement. Specifically, the first clamping mechanism 210 includes a movable clamp 211 and a pressure rod 212. The pressure rod 212 is connected to the above-mentioned power mechanism 230 so that the power mechanism 230 can drive the pressure rod 212 to produce a back and forth up and down movement, and the movable clamp 211 is installed at the bottom of the pressure rod 212 so that the movable clamp 211 moves with the pressure rod 212. The pressure rod 212 is hinged on the surface of the partition 110. When the pressure rod 212 moves, it rotates along a plane parallel to the surface of the partition 110, that is, the movement plane of the pressure rod 212 is parallel to the surface of the partition 110. In this embodiment, the second clamping mechanism 220 includes a fixed clip 221, which is fixedly mounted on the surface of the partition 110. The fixed clip 221 is arranged opposite to the movable clip 211. When the movable clip 211 moves to the lowest position, it can cooperate with the fixed clip 221, so that the filter membrane 600 is clamped and pressed between the movable clip 211 and the fixed clip 221. In addition, in order to increase the clamping force on the filter membrane 600 and the sealing after clamping, a sealing ring 222 is also installed on the surface of the fixed clip 221.

[0033] In the above-mentioned clamping unit 200, the first clamping mechanism 210 is moved by the power mechanism 230, thereby realizing the up-and-down movement to open or clamp the filter membrane 600. In the working state, the first clamping mechanism 210 and the second clamping mechanism 220 are in a clamping state, and the filter membrane 600 is filtering the air passing through the filter membrane 600, thereby collecting particulate matter to complete the subsequent analysis work. In the replacement state, the first clamping mechanism 210 and the second clamping mechanism 220 are in a separated state, and at this time, the filter membrane 600 is moved forward by the membrane moving unit 300, so that the clean filter membrane 600 located in the subsequent is moved to the working area. After the filter membrane 600 moves to the specified position, the first clamping mechanism 210 and the second clamping mechanism 220 perform a clamping action again to position the filter membrane 600 in the working area.

[0034] like Figure 2As shown, the power mechanism 230 includes an eccentric wheel 231 and a spring 232. The power mechanism 230 is used to drive the pressure rod 212 to produce up and down movement, so that the bottom of the spring 232 is fixedly connected to the top of the pressure rod 212, the top of the spring 232 contacts the inner top wall of the chassis 100, and the spring 232 is in a compressed state. In this state, the spring 232 always applies a downward force to the pressure rod 212. When the filter membrane 600 is in a working state, the pressure rod 212 is in the lowest position under the action of the spring 232, so that the first clamping mechanism 210 and the second clamping mechanism 220 can clamp and position the filter membrane 600. When the filter membrane 600 is in a replacement state, the eccentric wheel 231 lifts the pressure rod 212 to overcome the resistance of the spring 232, so that the pressure rod 212 is lifted, thereby releasing the filter membrane 600. In the embodiment of the present invention, the eccentric wheel 231 is disposed below the pressure rod 212 , the rim of the eccentric wheel 231 is in contact with the pressure rod 212 , and the pressure rod 212 generates a rotational motion under the action of the eccentric wheel 231 .

[0035] In one embodiment of the present invention, Figure 3 As shown, the membrane moving unit 300 includes a driving wheel 310, a driven wheel 320, a guide wheel 330 and a counting wheel 340. A filter membrane 600 is arranged between the driving wheel 310 and the driven wheel 320. Rotating drums are respectively fixed at both ends of the filter membrane 600. The two rotating drums are respectively sleeved in the driving wheel 310 and the driven wheel 320, so that the two rotating drums respectively rotate with the driving wheel 310 and the driven wheel 320, and the filter membrane 600 is moved during the rotation of the rotating drums. In the embodiment of the present invention, the installation position of the driving wheel 310 and the driven wheel 320 is lower than the installation position of the second clamping mechanism 220, so that the guide wheel 330 and the counting wheel 340 can be installed above the driving wheel 310 and the driven wheel 320 to control the direction of the filter membrane 600. At the same time, the counting wheel 340 can also record the rotation angle, so as to achieve accurate control of the length of the filter membrane 600.

[0036] In the present invention, if Figure 4As shown, the air guide unit 400 includes an air inlet seat 410, an air inlet pipe 420, a movable clamp support 430, a fixed clamp support 440, an air outlet pipe 450 and an air outlet seat 460. Among them, the air inlet seat 410 is fixedly installed on the inner top wall of the chassis 100, the air outlet seat 460 is fixedly installed on the inner bottom wall of the chassis 100, the movable clamp support 430 is fixedly installed in the movable clamp 211, the fixed clamp support 440 is fixedly installed in the fixed clamp 221, one end of the air inlet pipe 420 is connected to the sampling main pipe, and the other end is fixedly connected to the movable clamp support 430, and the air inlet pipe 420 is connected to the air inlet seat 410 through the air inlet joint 470, one end of the air outlet pipe 450 is connected to the analyzer 700, and the other end is fixedly connected to the fixed clamp support 440, and the air outlet pipe 450 is connected to the air outlet seat 460 through the air outlet joint 480. When performing gas analysis, the sampling main pipe passes the collected gas into the position of the filter membrane 600 through the air inlet pipe 420. After being filtered by the filter membrane 600, the gas penetrates the filter membrane 600 and then enters the air outlet pipe 450, and enters the analyzer 700 through the air outlet pipe 450, thereby completing the gas analysis. It should be pointed out that air pumps are installed in the air inlet seat 410 and the air outlet seat 460, respectively, so as to provide flow power for the air flow.

[0037] In the present invention, if Figure 5 As shown, the electric control unit 500 includes a control chip 510, a first sensor component 520, a second sensor component 530 and a power supply 540, wherein the power supply 540 is respectively connected to the control chip 510, the first clamping mechanism 210, the membrane running unit 300 and the air guide unit 400 to supply power to each power-consuming part. The first sensor component 520 is adapted to the clamping unit 200 to control the opening and closing state of the clamping unit 200, and the second sensor component 530 is adapted to the membrane running unit 300 to control the running length of the filter membrane 600.

[0038] Specifically, the first sensor component 520 includes a first photoelectric switch 521 and a baffle 522 fixedly mounted on the surface of the eccentric wheel 231. The first photoelectric switch 521 is connected to the control chip 510. The rotation center of the baffle 522 coincides with the rotation center of the eccentric wheel 231. The outer edge of the baffle 522 extends out of the rim of the eccentric wheel 231, so that the baffle 522 is clamped in the first photoelectric switch 521. The baffle 522 can record the rotation angle of the eccentric wheel 231, thereby facilitating the control chip 510 to control the rotation angle of the eccentric wheel 231. The second sensing component 530 includes a second photoelectric switch 531 and a wheel 532. The second photoelectric switch 531 is connected to the control chip 510. The wheel 532 is clamped in the second photoelectric switch 531, and a plurality of counting holes 533 are provided on the wheel 532. The axis of the counting hole 533 coincides with the optical axis of the light beam of the second photoelectric switch 531. The wheel 532 is fixedly installed in the counting wheel 340. The counting holes 533 are distributed along the circumference, and the center of the circumference coincides with the center of the wheel 532. The counting holes 533 cooperate with the second photoelectric switch 531 to record the rotation angle of the wheel 532, and then the travel length of the filter membrane 600 can be controlled.

[0039] It should be noted that the power mechanism 230 and the film-feeding unit 300 are provided with numerically controlled motors, respectively, and the numerically controlled motors are connected to the control chip 510, respectively, so that the control chip 510 can issue action instructions to the numerically controlled motors, respectively. In the power mechanism 230, the output shaft of the numerically controlled motor is fixedly connected to the eccentric wheel 231 to control the rotational motion and state of the eccentric wheel 231. In the film-feeding unit 300, the output shaft of the numerically controlled motor is fixedly connected to the driving wheel 310 to control the rotational motion and state of the driving wheel 310.

[0040] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0041] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. An automatic membrane changer, characterized in that: It comprises a chassis, in which a pressing unit, a film-moving unit, an air-guiding unit and an electric control unit are arranged, and the pressing unit, the film-moving unit and the air-guiding unit are respectively connected to the electric control unit; The clamping unit includes a first clamping mechanism and a second clamping mechanism, and a power mechanism is provided between the first clamping mechanism and the second clamping mechanism, so that the first clamping mechanism and the second clamping mechanism are opened or closed by the power mechanism; and when the first clamping mechanism and the second clamping mechanism are opened, the film-moving unit moves under the control of the electronic control unit, and when the first clamping mechanism and the second clamping mechanism are closed, the film-moving unit stops moving under the control of the electronic control unit; The film-moving unit comprises a driving wheel, a driven wheel, a guide wheel and a counting wheel, a filter membrane is arranged between the driving wheel and the driven wheel, and the filter membrane passes through a gap between the first pressing mechanism and the second pressing mechanism; The electronic control unit includes a control chip and a first sensor component and a second sensor component. The first sensor component is adapted to the pressing unit, and the second sensor component is adapted to the film moving unit.

2. The automatic membrane changer according to claim 1, characterized in that: The interior of the chassis is divided into a first space and a second space by a partition, wherein the pressing unit, the film moving unit and the air guiding unit are arranged in the first space, and the electronic control unit is arranged in the second space.

3. The automatic membrane changer according to claim 2, characterized in that: The first clamping mechanism includes a movable clamp and a pressure rod, the movable clamp is installed at the bottom of the pressure rod, and the pressure rod is hinged on the surface of the partition, so that the pressure rod can rotate along a plane parallel to the surface of the partition.

4. The automatic membrane changer according to claim 3, characterized in that: The power mechanism includes an eccentric wheel and a spring, the bottom of the spring is fixedly connected to the top of the pressure rod, and the top of the spring contacts the inner top wall of the chassis, so that the spring is in a compressed state; The eccentric wheel is arranged below the pressure rod, and the rim of the eccentric wheel is in contact with the pressure rod, so that the pressure rod generates a rotational motion under the action of the eccentric wheel.

5. The automatic membrane changer according to claim 4, characterized in that: The second pressing mechanism comprises a fixed clamp, which is fixedly mounted on the surface of the partition, and the movable clamp cooperates with the fixed clamp when it moves to the lowest position, so that the filter membrane is clamped and pressed between the movable clamp and the fixed clamp; A sealing ring is also installed on the surface of the fixing clip.

6. The automatic membrane changer according to claim 5, characterized in that: The air guide unit comprises an air inlet seat, an air inlet pipe, a movable clamp support, a fixed clamp support, an air outlet pipe and an air outlet seat; wherein the air inlet seat is fixedly mounted on the inner top wall of the chassis, the air outlet seat is fixedly mounted on the inner bottom wall of the chassis, the movable clamp support is fixedly mounted in the movable clamp, and the fixed clamp support is fixedly mounted in the fixed clamp; One end of the air intake pipe is connected to the sampling main pipe, and the other end is fixedly connected to the movable clamping support, and the air intake pipe is connected to the air intake seat through the air intake joint; One end of the air outlet pipe is connected to the analyzer, and the other end is fixedly connected to the fixed clamp support, and the air outlet pipe is connected to the air outlet seat through the air outlet joint.

7. The automatic membrane changer according to claim 6, characterized in that: The first sensing component includes a first photoelectric switch and a baffle fixedly mounted on the surface of the eccentric wheel, the rotation center of the baffle coincides with the rotation center of the eccentric wheel, and the outer edge of the baffle extends out of the rim of the eccentric wheel, so that the baffle is clamped in the first photoelectric switch.

8. The automatic membrane changer according to claim 7, characterized in that: The second sensor assembly includes a second photoelectric switch and a wheel disc, the wheel disc is clamped in the second photoelectric switch, and a plurality of counting holes are provided on the wheel disc, the axes of the counting holes coincide with the optical axis of the light beam of the second photoelectric switch, and the wheel disc is fixedly installed in the counting wheel; The plurality of counting holes are distributed along a circumference, and the center of the circumference coincides with the center of the wheel disc.

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