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CN-224231748-U - Detection probe with replaceable filter element

CN224231748UCN 224231748 UCN224231748 UCN 224231748UCN-224231748-U

Abstract

The utility model belongs to the technical field of test equipment, and particularly relates to a detection probe capable of replacing a filter element, which comprises a probe main body and a filter element assembly detachably arranged at the rear end of the probe main body, wherein the filter element assembly comprises an integrated filter element base and a sintered filter element, the integrated filter element base is sequentially provided with a filter body fixing section, a coaxial guiding and positioning section, a flange butt joint disc and a gas path connecting section from front to back along the flowing direction of tested gas, the rear end face of the sintered filter element is fixedly connected with the filter body fixing section, the rear end opening of the filter body fixing section is sleeved in the coaxial guiding and positioning section and forms sealing rigid fixation, the coaxial guiding and positioning section is fixedly connected with the flange butt joint disc, the flange butt joint disc is fixedly connected with the gas path connecting section, and the rear end face of the probe main body is provided with a butt joint flange which is completely matched with the flange butt joint disc. The device can realize quick replacement of the filter element, improves maintenance efficiency and enhances equipment operation stability.

Inventors

  • WU JUNBIN
  • FU XINGWANG

Assignees

  • 淄博淄城环保科技有限公司

Dates

Publication Date
20260512
Application Date
20260415

Claims (10)

  1. 1. The detection probe capable of replacing the filter element comprises a probe main body (1) and a filter element assembly detachably mounted at the rear end of the probe main body (1), and is characterized in that the filter element assembly comprises an integrated filter element base and a sintered filter element (2), the integrated filter element base is of a stepped shaft structure which is coaxially processed, a filter body fixing section (3), a coaxial guide positioning section (4), a flange butt joint disc (5) and a gas path connecting section (6) are sequentially arranged on the integrated filter element base from front to back along the flowing direction of detected gas, the rear end face of the sintered filter element (2) is fixedly connected with the filter body fixing section (3), a rear end opening of the filter body fixing section (3) is sleeved in the coaxial guide positioning section (4) and forms a sealing rigid fixation, the coaxial guide positioning section (4) is fixedly connected with the flange butt joint disc (5), the flange butt joint disc (5) is fixedly connected with the gas path connecting section (6), a butt joint flange which is completely matched with the flange butt joint disc (5) is arranged on the rear end face of the probe main body (1), and the flange butt joint disc (5) is detachably rigid connected with the butt joint flange through fastening.
  2. 2. The detection probe of the replaceable filter element according to claim 1, wherein the gas path connecting section (6) is in coaxial sealing butt joint with a sampling gas path leading to the detection sensor at the rear end of the probe body (1).
  3. 3. The detection probe of the replaceable filter element according to claim 2, wherein a through inner hole is formed in the integrated filter element base, and the through inner hole is communicated with the inner cavity of the sintered filter element (2) and the sampling gas path of the probe body (1).
  4. 4. A replaceable filter cartridge inspection probe according to claim 3 wherein the through bore is a full length, constant diameter straight-through bore.
  5. 5. A test probe for a replaceable filter cartridge according to claim 3, characterized in that the bore diameter of the through bore is equal to the bore diameter of the inner bore of the sintered filter cartridge (2).
  6. 6. The detection probe of the replaceable filter element according to claim 1, wherein the sintered filter element (2) has a blind end cylindrical porous sintered metal structure, and the front end of the sintered filter element (2) has a closed end face.
  7. 7. The detection probe of the replaceable filter element according to claim 6, wherein the peripheral side wall and the front end closed end face of the sintered filter element (2) are both filter working faces.
  8. 8. The detection probe of the replaceable filter element according to claim 1, wherein a plurality of groups of fixing through holes (7) are formed in the circumferential direction of the flange butt joint disc (5), internal threaded holes corresponding to the fixing through holes (7) one by one are formed in the butt joint flange of the probe main body (1), and fastening bolts penetrate through the fixing through holes (7) and are screwed into the internal threaded holes.
  9. 9. The detection probe of the replaceable filter element according to claim 8, wherein an annular sealing groove is arranged between the flange butt-joint disc (5) and the butt-joint end face of the butt-joint flange, and an elastic sealing ring is arranged in the annular sealing groove.
  10. 10. The detection probe of the replaceable filter element according to claim 1, wherein an O-ring is arranged between the filter body fixing section (3) and the coaxial guiding and positioning section (4), and the O-ring is in interference fit with the inner wall of the coaxial guiding and positioning section (4) to form a radial seal.

Description

Detection probe with replaceable filter element Technical Field The utility model belongs to the technical field of test equipment, and particularly relates to a detection probe with a replaceable filter element. Background In the detection process of gases such as industrial flue gas, process waste gas and the like, the detected gases generally contain a large amount of dust, particulate matters, tar and corrosive components, and if the gases directly enter a detection analysis unit, the sampling gas path is easy to be blocked, and a detection sensor is polluted or even permanently damaged. Therefore, the front end of the detection probe is usually required to be provided with a filter element in a matching way, so as to carry out dust removal pretreatment on the detected gas. The existing gas detection probe with the filtering function is mostly of an internal or external screwed structure, the internal filter element is required to be integrally embedded into the probe cylinder, the end shell of the probe is required to be completely disassembled when the filter element is replaced, the internal sampling gas circuit and the electric wiring are disconnected, the operation steps are complicated and long in time consumption, the external screwed filter element is mostly connected with the probe body in a threaded screwing mode, the filter element body is required to be driven to circumferentially rotate in the disassembling and assembling process, brittle filter elements such as sintered metal and ceramic are easy to crack, and the problems of thread slipping and clamping are easy to occur. Meanwhile, the existing probe adopts a single-channel sealed multi-component spliced filter element base, so that sealing failure is easy to occur under the industrial working condition of high-temperature alternation and strong vibration, and further, detection data distortion and electrical element corrosion short circuit are caused. In the aspect of filter element filtering structure, the filter element matched with the existing detection probe mostly adopts an end face air inlet filtering structure, only depends on the end face of the end part of the filter element as a filtering working face, has small effective filtering area, is extremely easy to rapidly accumulate on the end face of dust particles in detected gas, causes filter element blockage, needs to frequently carry out ash removal maintenance and replacement, and has short service life. In addition, the existing detection probes are of an integrated fixed structure, damaged parts cannot be replaced independently, spare parts are high in maintenance cost, and working condition suitability is poor. Chinese patent CN216050965U discloses a replacement type probe filter core for flue gas dilution sampling probe, including filter core shell, inner core, bottom, heating pipeline, top cap, dismounting device, the toper section of thick bamboo is installed in filter core shell left side, and threaded hole is seted up to filter core shell right side wall, and this threaded hole is inside to have the bottom through threaded connection, and filter core shell internally mounted has the inner core, and the heating pipeline is installed to the inner core lateral wall, the heating pipeline is helical piping, and inlet and leakage fluid dram have been seted up respectively to filter core shell lateral wall, and the heating pipeline both ends extend the filter core shell outside from this inlet and leakage fluid dram respectively, and the top cap is installed respectively at the heating pipeline both ends. The conical sleeve is added outside the probe pipeline, and the conical barrel is arranged on the filter element shell, so that the function of quickly replacing the filter element is realized, and the aim of improving the replacement efficiency of the filter element is fulfilled. However, the dismounting device of this patent contains a plurality of accurate cooperation parts such as driving gear, driven gear, dwang, fixed sleeve, movable sleeve, circular slide rail, and flue gas detection scene is mostly high temperature, high dust, high corrosion, strong vibrating abominable operating mode, and the dust very easily gets into gear engagement clearance and screw thread mating surface and causes the jamming, finally leads to dismounting device to become invalid entirely. Meanwhile, in the structure of threaded connection and clearance fit in the patent, under the working condition of high-temperature alternating of smoke, the problem that the fit clearance becomes large and the seal fails due to thermal expansion and contraction can occur, and the sealing stability under the working condition of high temperature is poor. Disclosure of utility model The utility model aims to provide a detection probe with a replaceable filter element, which can realize quick replacement of the filter element, improve maintenance efficiency, improve sealing reliability and enhance equipment