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CN-224207780-U - Automatic membrane changing device

CN224207780UCN 224207780 UCN224207780 UCN 224207780UCN-224207780-U

Abstract

The utility model discloses an automatic membrane replacing device, which relates to the technical field of automation, and comprises a membrane storing unit and a transmission channel, wherein the membrane storing unit comprises a plurality of membrane boxes which are arranged along the circumferential direction and rotate along the circumferential direction, a filtering membrane is arranged in each membrane box, openings are formed in the upper part and the lower part of each membrane box and used for realizing gas transmission, the transmission channel comprises an upper channel, a lower channel and a mechanical arm, the mechanical arm is used for controlling the movement of the upper channel and the lower channel, the upper channel and the lower channel are used for clamping the membrane boxes so as to form a sealed transmission channel, and the filtering membrane in each membrane box realizes the filtering function in the sealed transmission channel. The membrane storage unit is provided with the membrane boxes which are circumferentially arranged, a plurality of filtering membranes can be stored, old membranes are automatically moved away, new membranes accurately rotate to target positions through the membrane storage unit, manual intervention is not needed, membrane replacement efficiency is greatly improved, and the membrane storage unit is suitable for long-term continuous sampling scenes.

Inventors

  • ZHANG ZHIWEN
  • XIE PINHUA
  • HU RENZHI
  • ZHANG JU

Assignees

  • 合肥综合性科学中心环境研究院

Dates

Publication Date
20260508
Application Date
20250512

Claims (9)

  1. 1. An automatic film changing device is characterized by comprising a film storage unit and a transmission channel; The membrane storage unit comprises a plurality of membrane boxes (2) which are distributed along the circumferential direction, wherein the membrane boxes (2) rotate along the circumferential direction, a filtering membrane is arranged in the membrane boxes (2), and the membrane boxes (2) are provided with openings at the upper and lower parts for realizing gas transmission; the transmission channel comprises an upper layer channel (6), a lower layer channel (7) and a mechanical arm (8), wherein the mechanical arm (8) is used for controlling the movement of the upper layer channel (6) and the lower layer channel (7), the upper layer channel (6) and the lower layer channel (7) are used for clamping the membrane box (2) so as to form a sealed transmission channel, and a filtering membrane in the membrane box (2) realizes a filtering effect in the sealed transmission channel.
  2. 2. The automatic film changing device according to claim 1, wherein the film storing unit comprises a wheel disc (1), a film box (2), a cover plate (3), a positioning disc (4) and a driving mechanism (5); The disc (1) is positioned above the positioning disc (4) and is fixedly connected with the positioning disc, a plurality of first through holes (101) are formed in the disc (1) along the circumferential direction, a plurality of grooves (401) corresponding to the first through holes (101) are formed in the positioning disc (4) along the circumferential direction, a capsule (2) is formed by a cavity formed by the first through holes (101) and the corresponding grooves (401), a second through hole (402) coaxially aligned with the first through holes (101) is formed in the grooves (401), and the first through holes (101) and the second through holes (402) form upper openings and lower openings of the capsule (2); The cover plate (3) is positioned above the wheel disc (1) and is used for sealing the upper opening of the diaphragm capsule (2), and an opening (301) is formed in the cover plate (3); The lower surface of the positioning disc (4) is positioned below the groove (401), namely the bottom of the capsule (2) is provided with a puncturable sealing film (202) for sealing the lower opening of the capsule (2), and the lower layer channel (7) is correspondingly provided with a puncture needle (702) for puncturing the sealing film (202); the driving mechanism (5) is used for driving the positioning disc (4) and the wheel disc (1) to synchronously rotate, so that the rotation of the diaphragm capsule (2) is realized, and the cover plate (3) does not rotate.
  3. 3. The automatic film changing device according to claim 2, wherein the hole wall of the first through hole (101) extends towards the lower side of the wheel disc (1) to form a convex ring (102), and the convex rings (102) below the first through holes (101) are correspondingly clamped in the grooves (401), so that the positioning disc (4) and the wheel disc (1) are fixedly clamped.
  4. 4. The automatic film changing device according to claim 2, wherein magnets are uniformly distributed in the grooves (401) of the positioning disk (4) along the circumferential direction of the second through holes (402), and the magnets are used for carrying out magnetic attraction positioning with the lower layer channel (7).
  5. 5. An automatic film changing device according to claim 2, characterized in that the driving mechanism (5) comprises a stepper motor and a harmonic reducer.
  6. 6. An automatic membrane changing device according to claim 1, characterized in that each membrane box (2) is correspondingly provided with an RFID chip for storing relevant information of the filtering membrane, including the material of the filtering membrane, initial resistance and expiration date information.
  7. 7. An automatic membrane changing device according to claim 1, characterized in that a temperature control unit is also provided in each membrane cartridge (2) for controlling the temperature in the membrane cartridge (2).
  8. 8. The automatic membrane replacing device according to claim 1, wherein the upper layer channel (6) is conical, the conical necking end is upward, the conical flaring end is downward, the lower layer channel (7) is conical, the conical flaring end is upward, the conical necking end is downward, the conical necking end of the upper layer channel (6) serves as an air inlet end (601), and the conical necking end of the lower layer channel (7) serves as an air outlet end (701) and is connected with a sampling cavity of sampling equipment.
  9. 9. The automatic membrane changing device according to claim 8, wherein pressure sensors are arranged in the upper layer channel (6) and the lower layer channel (7) and used for monitoring the pressure in the channels in real time, and the air inlet end (601) and the air outlet end (701) are respectively provided with a flow sensor and an electromagnetic valve and used for monitoring the gas flow and controlling the gas flow in real time.

Description

Automatic membrane changing device Technical Field The utility model relates to the technical field of automation, in particular to an automatic film changing device. Background In the field of atmosphere monitoring, a filter membrane is used as a core protection component of a gas detection system and has double functions, namely, on one hand, a rear-end precise analysis instrument is protected by intercepting particulate matters, and on the other hand, a particulate matter sample carrier is provided for an off-line analysis device. Limited by the useful life of the diaphragm, the system must periodically perform diaphragm replacement to maintain measurement accuracy and data continuity. The realization of automatic replacement of the filtering membrane has key effects on guaranteeing the cleanliness of a sampling system, the accuracy of parameter measurement and the long-acting stable operation of equipment. The traditional sampling equipment relies on the manual work to change the filtration membrane, and the operation flow needs to frequently start and stop the equipment, disassemble the filtration membrane clamp and manually install a new membrane. This approach suffers from the following significant drawbacks: 1. The efficiency is low, the manual membrane replacement takes about 5-10 minutes/time, and the high-frequency sampling requirement (such as the replacement of the ultra-station gridding monitoring in each hour) is difficult to meet; 2. The reliability risk is that external pollution or membrane surface damage may be introduced in the manual membrane replacement operation process, so that sample loss or error is caused (research shows that the manual operation error rate can reach 3% -8%); 3. The high-risk scene is limited in that the personnel safety hidden danger exists in high-temperature, high-corrosion or radioactive environments (such as flue monitoring of garbage incineration plants), and manual membrane replacement cannot be performed; Disclosure of utility model In order to overcome the defects in the prior art, the utility model provides an automatic membrane replacing device, which aims to solve the problems of low efficiency, high operation risk, insufficient reliability and the like caused by the fact that the existing gas sampling equipment relies on manual or low-reliability automation scheme to replace a filtering membrane. In order to achieve the above purpose, the present utility model adopts the following technical scheme, including: an automatic membrane changing device comprises a membrane storage unit and a transmission channel; the membrane storage unit comprises a plurality of membrane boxes which are distributed along the circumferential direction and rotate along the circumferential direction, wherein a filtering membrane is placed in each membrane box, and the membrane boxes are provided with openings at the upper and lower parts for realizing gas transmission; The transmission channel comprises an upper channel, a lower channel and a mechanical arm, wherein the mechanical arm is used for controlling the movement of the upper channel and the lower channel, the upper channel and the lower channel are used for clamping a membrane box so as to form a sealed transmission channel, and a filtering membrane in the membrane box realizes a filtering effect in the sealed transmission channel. Preferably, the membrane storage unit comprises a wheel disc, a membrane box, a cover plate, a positioning disc and a driving mechanism; The wheel disc is positioned above the positioning disc and is coaxially and fixedly connected with the positioning disc, a plurality of first through holes are formed in the wheel disc along the circumferential direction, a plurality of grooves corresponding to the first through holes are formed in the positioning disc along the circumferential direction, a capsule is formed by a cavity formed by the first through holes and the corresponding grooves, a second through hole coaxially aligned with the first through holes is formed in the grooves, and the first through holes and the second through holes form upper and lower openings of the capsule; The cover plate is positioned above the wheel disc and is used for sealing the upper opening of the diaphragm capsule; The lower surface of the positioning disc is positioned below the groove, namely the bottom of the diaphragm capsule is provided with a puncturable sealing film for sealing the lower opening of the diaphragm capsule; the driving mechanism is used for driving the positioning disc and the wheel disc to synchronously rotate, so that the rotation of the diaphragm capsule is realized, and the cover plate does not rotate. Preferably, the hole wall of the first through hole extends towards the lower side of the wheel disc to form convex rings, and the convex rings below the first through holes are correspondingly clamped in the grooves, so that the positioning disc and the wheel disc are fixedly clamped.