High-temperature-resistant permanent magnet filter stick

Abstract

The utility model relates to a permanent magnet filter rod with high temperature resistance, which belongs to the field of magnetic filters and comprises a shell and a magnetic steel component, the shell comprises an outer shell protective cover, an inner hole protective cover and two end plates, outer rings of the two end plates are respectively connected with two ends of the outer shell protective cover, two ends of the inner hole protective cover are respectively connected with the two end plates, and the magnetic steel component is arranged in the outer shell protective cover. A gap exists between the inner wall of the shell protection cover and the outer wall of the inner hole protection cover, the magnetic steel assembly is installed in the gap, the magnetic steel assembly is formed by splicing a plurality of sets of H-performance neodymium iron boron magnetic steel, and the adjacent H-performance neodymium iron boron magnetic steel are in close contact. The high-temperature-resistant permanent magnet filter stick is not easy to damage, can ensure that the filter stick cannot be demagnetized at a higher temperature, and is smaller in size under the condition of the same suction force.

Description

Technical Field

[0001] The utility model belongs to the field of magnetic filters, in particular to a high-temperature-resistant permanent magnetic filter rod. Background Art

[0002] The steel manufacturing and metal material processing industries must remove rust from the metal surface. Commonly used rust removal methods include high-pressure water jet rust removal, sandblasting rust removal, laser rust removal, acid degreasing rust removal, alkaline degreasing rust removal, heating treatment, ultrasonic degreasing rust removal, etc. No matter which surface rust removal method is used, a large amount of rust, dust, grease and other impurities will be produced. If the waste liquid containing these impurities is not treated, the liquid will stink and turn black over time. The magnetic filter is composed of a strong magnetic material with high coercivity and a blocking filter. It is a tool used to filter magnetic impurities such as rust in waste liquid.

[0003] Existing magnetic filters, such as the permanent magnet filter rod disclosed in the Chinese patent application with application publication number CN102228760A, include an outer sleeve and segmented permanent magnet rods installed in the outer sleeve, and each segment of the permanent magnet rod is isolated and connected by an ordinary steel pipe segment; there is a radial gap between the outer sleeve and the segmented permanent magnet rod and the ordinary steel pipe segment; the two end faces of the outer sleeve are respectively closed by iron sheets and sealed with sealing rings.

[0004] The two end faces of the outer sleeve of the above-mentioned magnetic filter are respectively closed by iron sheets, that is, the iron sheet is only connected and fixed to the outer sleeve at the outer ring. Once the connection between the iron sheet and the outer sleeve is broken, the internal permanent magnet rod will fall out, causing damage to the magnetic filter; common permanent magnet filter rods use N-performance grade neodymium iron boron magnets. N-performance neodymium iron boron magnets have poor temperature resistance compared to high coercive force magnets, resulting in demagnetization when the working temperature is above 80 degrees Celsius. This demagnetization is irreversible, and permanent magnet filter rods are widely used in food, pharmaceutical, chemical and other industries to filter iron filings, iron powder or magnetic materials in liquids. The use environment can easily reach the demagnetization critical point of 80 degrees Celsius, resulting in demagnetization and endangering safe use; each section of the permanent magnet rod is isolated by an ordinary steel pipe section. Under the same suction conditions, the size of the magnetic filter is larger. Utility Model Content

[0005] The utility model aims to provide a high temperature resistant permanent magnetic filter rod to solve the problems of insufficient connection strength between the end plate and the outer sleeve of the existing permanent magnetic filter, easy damage, poor high temperature resistance, large size, etc.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0007] The utility model relates to a high-temperature-resistant permanent magnetic filter rod, which comprises a shell and a magnetic steel component. The shell comprises an outer shell protective cover, an inner hole protective cover and two end plates. The outer circles of the two end plates are respectively connected to the two ends of the outer shell protective cover, and the two ends of the inner hole protective cover are respectively connected to the two end plates. There is a gap between the inner wall of the outer shell protective cover and the outer wall of the inner hole protective cover, and the magnetic steel component is installed in the gap.

[0008] Preferably, the magnetic steel assembly is spliced ​​by several groups of H-performance NdFeB magnetic steels, and the several groups of H-performance NdFeB magnetic steels are evenly arranged along the circumference, and the N level of each group of H-performance NdFeB magnetic steels is opposite to the N level of one of the adjacent groups of H-performance NdFeB magnetic steels, and the S level is opposite to the S level of another adjacent group of H-performance NdFeB magnetic steels.

[0009] Preferably, the H-performance NdFeB magnets in the same group of H-performance NdFeB magnets are arranged along a straight line, and adjacent H-performance NdFeB magnets are in close contact.

[0010] Preferably, bosses are provided on opposite sides of the two end plates, and the two ends of the inner hole protection cover are respectively sleeved on the bosses of the two end plates.

[0011] Preferably, the cross-section of the H-performance NdFeB magnet is fan-shaped, the inner ring of the H-performance NdFeB magnet is in close contact with the inner hole protection cover, and the outer ring of the H-performance NdFeB magnet is in close contact with the outer hole protection cover.

[0012] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0013] 1. The two end plates of the high temperature resistant permanent magnetic filter rod involved in the utility model are not only connected to the outer shell protective cover, but also connected to the two ends of the inner hole protective cover, that is, the end plates are fixed by multi-point connection, the connection strength is high, not easy to be damaged, and the internal magnetic steel components are not easy to fall out.

[0014] 2. The magnetic steel component inside the high-temperature-resistant permanent magnetic filter rod involved in the utility model adopts H-performance NdFeB magnetic steel. The H-performance NdFeB magnetic steel has better temperature resistance and ensures that it will not demagnetize even at higher temperatures.

[0015] 3. The magnetic steel assembly inside the high-temperature-resistant permanent magnetic filter rod involved in the utility model is composed of several groups of H-performance NdFeB magnets, which are evenly arranged along the circumference. The H-performance NdFeB magnets in the same group are arranged along a straight line, and adjacent H-performance NdFeB magnets are in close contact, which makes full use of the space inside the shell. Under the condition of the same suction force, the volume of the filter rod is smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a radial cross-sectional view of a high temperature resistant permanent magnetic filter rod;

[0017] Figure 2 This is an exploded view of a high temperature resistant permanent magnetic filter rod;

[0018] Figure 3 This is a schematic diagram of the arrangement of H-performance NdFeB magnets inside a high-temperature-resistant permanent magnetic filter rod.

[0019] Among them, 11-shell protection cover, 12-inner hole protection cover, 13-end plate, 14-boss, 2-H performance NdFeB magnet. DETAILED DESCRIPTION

[0020] The technical scheme of the utility model is further described in detail below through specific embodiments. The embodiments are for the purpose of explaining the utility model, not for limiting the utility model. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] See attached Figure 1 and 2 As shown, the utility model relates to a high temperature resistant permanent magnetic filter rod including a shell and a magnetic steel assembly. The shell includes an outer shell protective cover 11, an inner hole protective cover 12 and two end plates 13. The outer rings of the two end plates 13 are respectively connected to the two ends of the outer shell protective cover 11. The two end plates 13 are provided with bosses 14 on the opposite sides. The two ends of the inner hole protective cover 12 are respectively sleeved on the bosses 14 of the two end plates 13. In this way, each end plate 13 is fixedly connected to the inner and outer shell protective covers 11 and 12 to ensure the connection strength of the end plates 13 and prevent the end plates 13 from separating from the shell and exposing the internal structure. There is a gap between the inner wall of the outer shell protective cover 11 and the outer wall of the inner hole protective cover 12, and the magnetic steel assembly is installed in the gap.

[0022] The magnetic steel assembly is composed of several groups of H-performance NdFeB magnetic steels 2. The H-performance NdFeB magnetic steels 2 have better temperature resistance and will not demagnetize at a temperature of 120°C. Figure 3 As shown, several groups of H-performance NdFeB magnets 2 are evenly arranged along the circumference, the N level of each group of H-performance NdFeB magnets 2 is opposite to the N level of one of the adjacent groups of H-performance NdFeB magnets 2, and the S level is opposite to the S level of another adjacent group of H-performance NdFeB magnets 2, the H-performance NdFeB magnets 2 in the same group of H-performance NdFeB magnets are arranged along a straight line, the adjacent H-performance NdFeB magnets 2 are in close contact, the cross-section of each H-performance NdFeB magnet 2 is fan-shaped, the inner ring of the H-performance NdFeB magnet 2 is close to the inner hole protection cover 12, and the outer ring of the H-performance NdFeB magnet 2 is close to the outer hole protection cover 13, and the structure is compact.

[0023] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. At the same time, for those skilled in the art, according to the ideas of the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A high temperature resistant permanent magnetic filter rod, characterized in that: It includes a shell and a magnetic steel assembly, the shell includes an outer shell protective cover, an inner hole protective cover and two end plates, the outer circles of the two end plates are respectively connected to the two ends of the outer shell protective cover, the two ends of the inner hole protective cover are respectively connected to the two end plates, there is a gap between the inner wall of the outer shell protective cover and the outer wall of the inner hole protective cover, and the magnetic steel assembly is installed in the gap.

2. The high temperature resistant permanent magnetic filter rod according to claim 1, characterized in that: The magnetic steel assembly is composed of several groups of H-performance NdFeB magnetic steels, which are evenly arranged along the circumference. The N level of each group of H-performance NdFeB magnetic steels is opposite to the N level of one of the adjacent groups of H-performance NdFeB magnetic steels, and the S level is opposite to the S level of another adjacent group of H-performance NdFeB magnetic steels.

3. The high temperature resistant permanent magnetic filter rod according to claim 2, characterized in that: The H-performance NdFeB magnets in the same group of H-performance NdFeB magnets are arranged along a straight line, and adjacent H-performance NdFeB magnets are in close contact.

4. The high temperature resistant permanent magnetic filter rod according to claim 1, characterized in that: The two end plates are provided with bosses on one side opposite to the other, and the two ends of the inner hole protection cover are respectively sleeved on the bosses of the two end plates.

5. The high temperature resistant permanent magnetic filter rod according to claim 2, characterized in that: The cross section of the H-performance NdFeB magnet is fan-shaped, the inner ring of the H-performance NdFeB magnet is in close contact with the inner hole protection cover, and the outer ring of the H-performance NdFeB magnet is in close contact with the outer hole protection cover.

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