Round filter divider RNKJ-2.5 filter divider

The utility model relates to a circular filter membrane splitter, the structure of which comprises a filter membrane equalizer and a cutting tool; The filter membrane equalizer is provided with a retaining ring on the top surface of the base, and a cutter guide groove for equally dividing the circumference is opened on the retaining ring, and the groove bottom of the cutter guide groove is flush with the top surface of the base; There is a longitudinal film-taking groove between two adjacent cutter guide grooves, and the bottom of the film-taking groove is lower than the top surface of the base; On the top surface of the base, there are film-clamping grooves pointing to the center of the retaining ring along the outer circumference of the retaining ring, and one film-clamping groove communicates vertically with the groove bottom of one film-taking groove.

The utility model utilizes the cutter guide groove on the retaining ring to position the cutting tool, so that the cutting is accurate, and the cutting tool is not damaged during the operation process; Use the film taking groove and the film clamping groove on the retaining ring to insert the tweezers to take the film, so that the operation of taking the film is fast and convenient, avoiding secondary pollution and heavy metal pollution, and making the test result accurate. The utility model is suitable for popularization and use in the physical and chemical detection industry.

1. A circular filter membrane divider, characterized in that it includes a filter membrane equalizer and a cutter; The filter membrane equalizer is provided with an upwardly protruding retaining ring on the top surface of the base, the retaining ring is circular, and its inner diameter matches the size of the circular filter membrane; A longitudinal cutter guide groove is formed on the retaining ring, the width of the cutter guide groove is slightly smaller than the blade thickness of the cutting tool, and the groove bottom of the cutter guide groove is flush with the top surface of the base; There is a longitudinal film-taking groove in the middle of the retaining ring between two adjacent cutter guide grooves, the width of the film-taking groove is greater than the width of the cutter guide groove, and the groove bottom of the film-taking groove is lower than the top surface of the base; At the bottom of each membrane-taking groove and along the top surface of the base, there is a film-clamping groove leading to the inner side of the retaining ring, and the length of the film-clamping groove is less than the width of the left side of the circular filter membrane.
2. The circular filter membrane cutter according to claim 1, wherein the cutting tool includes a blade and a handle mounted on one end of the blade; the length of the blade is at least 1.5 times greater than the outer diameter of the retaining ring, and the cutting edge of the blade is ≤6mm.
3. The circular filter membrane divider according to claim 1, wherein a positioning chamfer inclined to the top surface of the base is provided at the root of the inner edge of the retaining ring, the bottom edge of the positioning chamfer is slightly higher than the top surface of the base, so that a positioning circle for automatically positioning the circular filter membrane is formed at the root of the retaining ring and the top surface of the base, the top surface of the base forms a positioning circle for automatic positioning of the circular filter membrane, the diameter of the positioning circle is equal to the nominal diameter of the circular filter membrane, and the height of the positioning circle is greater than the thickness of the circular filter membrane.
4. The circular filter membrane divider according to claim 1 or 2, characterized in that, a counterweight is provided on the base, and the counterweight is provided inside the base, or fixed on the lower part of the base.
5. The circular filter membrane divider according to claim 3, characterized in that, a dust cover is buckled and covered on the base, and the dust cover is connected to the base by threads or by buckles.

Background technique

0001) When carrying out physical and chemical detection to the content in fluid, often use the filter of band filter membrane to carry out the collection of content, promptly use filter after fluid filtration certain hour, take out the filter membrane in filter, carry out physical and chemical detection to the content filtered out on filter membrane. In order to ensure the objectivity and accuracy of the test results, according to the different test needs of the tested objects, the filter membrane is usually cut into the same parts, and the - part is taken for testing to represent the test results of this collection. The equalization method of the filter membrane with the substance to be tested is usually cut in half after folding, but this method cannot achieve accurate equalization, and often the area error of the filter membrane after shearing is close to or exceeds the allowable physical and chemical detection error, resulting in inaccurate test results and no reference value.

0002) The purpose of the utility model is to provide a circular filter membrane divider to solve the problem that the circular filter membrane is not easy to be equally divided, resulting in low accuracy of detection results.

0003) The utility model is realized in the following way: a circular filter membrane splitter, comprising a filter membrane equalizer and a cutting tool.

004) The filter membrane equalizer is a retaining ring that does not protrude upward on the top surface of the base. The retaining ring is circular, and its inner diameter matches the size of the circular filter membrane; There is a vertical cutter guide groove on the retaining ring that divides the circumference into eight equal parts, the width of the cutter guide groove is slightly smaller than the blade thickness of the cutting tool, and the groove bottom of the cutter guide groove is flush with the top surface of the base; There is a longitudinal film taking groove in the middle part of the retaining ring between two adjacent cutter guide grooves; The width of the film-taking groove is greater than the width of the cutter guide groove, and the bottom of the film-taking groove is lower than the top surface of the base; At the bottom of each membrane-taking groove and along the top surface of the base, there is a film-clamping groove leading to the inner side of the retaining ring, and the length of the film-clamping groove is less than the width of the left side of the circular filter membrane.

0005) After putting the circular filter membrane adsorbing the analyte into the filter membrane aliquot, the filter membrane can be placed flat on the top surface of the base in the circular retaining ring, insert the cutting knife into the two cutting knife guide grooves on the same diameter line on the retaining ring, and press it on the top platform of the filter membrane and the base, the filter membrane can be cut to realize two equal parts; Then turn the cutting knife 90° on the retaining ring and then insert and cut it along the guide groove of another set of cutting knife to realize quartering of the filter membrane. If the operation continues in sequence, the eight equal parts of the filter membrane can also be realized. When taking the membrane, use tweezers to insert it from the membrane taking groove on the outside of the retaining ring, and after clamping the edge of the filter membrane, you can take out the equally divided filter membrane single piece upwards along the membrane taking groove on the retaining ring. The length of the clamping groove is smaller than the width of the edge of the circular filter membrane, so that when the slit filter membrane is picked up with tweezers, the front end of the tweezers cannot touch the analyte within the edge of the filter membrane, so as to avoid adverse effects on the test results.

0006) The cutting tool includes a blade and a handle installed at one end of the blade; the length of the blade is at least 1.5 times greater than the outer diameter of the retaining ring, so as to facilitate cutting by hand pressing the blade; the cutting edge height of the blade is ≤6 mm, so that the height of the retaining ring on the filter membrane equalizer can be appropriately reduced, the strength of the retaining ring is correspondingly improved, and the service life is prolonged.

0007) A positioning chamfer inclined to the top surface of the base is provided on the inner edge of the retaining ring, and the bottom edge of the positioning chamfer is slightly higher than the top surface of the base, so that a positioning circle for automatic positioning of the circular filter membrane is formed at the root of the retaining ring and the top surface of the base. The diameter of the positioning circle is equal to the nominal diameter of the circular filter membrane, and the height of the positioning circle is greater than the thickness of the circular filter membrane. In this way, when the filter membrane is put into the retaining ring and falls to the top surface of the base, the position can be automatically corrected in the positioning circle, so as to improve the accuracy of equally dividing the filter membrane.

0008) The counterweight is arranged inside the base, or fixed on the lower part of the base. The setting of the counterweight can increase the overall weight of the base, avoiding the operation table. In addition, the accuracy of cutting the filter membrane is affected by the sliding of the base during the cutting operation.

0009) A dust-proof cover is buckled and covered on the base, and the dust-proof cover and the base are connected by threads or buckled. In this way, the cutter can be kept clean, dust or dirt can be avoided, and the detection accuracy can be improved.

0010) The utility model provides a matching cutting device for equally cutting circular filter membranes. Using the cutter guide groove on the retaining ring in the filter membrane equalizer to position the cutting tool can make the cutting accurate, and the cutting tool will not be damaged during the operation process, reducing the collapse of the cutting edge, which is conducive to improving the service life of the cutting tool; Using the film taking groove and the film clamping groove on the retaining ring to insert the tweezers to take the film makes the film taking operation fast and convenient, without the touch of human hands and utensils, avoiding secondary pollution and heavy metal pollution, and making the test results accurate. The utility model is suitable for popularization and use in the physical and chemical detection industry.