Sintering Process of a Prismatic Lens for a Stainless Steel Liquid Level Switch

Abstract

The present invention provides a sintering process for the prism lens of a stainless steel liquid level switch. Through process steps such as melting, sealing, casting, mirror surface forming, surface impurity removal, and lens polishing of glass and stainless steel screws, the glass is melted and directly formed in the inner cavity of the stainless steel screw, and then the glass in the protruding part is melted and formed into a conical prism lens through casting, realizing the cooperation and use of the prism lens of the liquid level switch and the stainless steel part. The present invention solves the problems that existing prism lenses are all plastic prism lenses or carbon steel prism lenses. The plastic prism lenses are prone to deformation and air pressure leakage under high temperature and high pressure conditions during use, with low safety, and the carbon steel prism lenses have poor corrosion resistance and short service life during use.

Description

Technical Field

[0001] The present invention belongs to the technical field of the production of prism lenses for liquid level switches, and particularly relates to a sintering process for prism lenses of stainless steel liquid level switches. Background Art

[0002] A liquid level switch, also known as a water level switch or a liquid level sensor, as the name implies, is a switch used to control the liquid level. When monitoring existing liquid level switches, prism lenses are used for observation. Commonly used are prism lenses made of plastic parts and carbon steel parts. Prism lenses made of plastic parts are prone to leakage under high temperature and high pressure conditions, and their safety is not high. Carbon steel parts have poor corrosion resistance and short service life. Summary of the Invention

[0003] In order to solve the problems that existing prism lenses are all prism lenses made of plastic parts or carbon steel parts, prism lenses made of plastic parts are prone to deformation and leakage of air pressure under high temperature and high pressure conditions, resulting in low safety, and prism lenses made of carbon steel parts have poor corrosion resistance and short service life during use, the present invention provides the following technical solutions:

[0004] A sintering process for prism lenses of stainless steel liquid level switches, including glass and stainless steel screws. The process includes the following steps:

[0005] a. Melting: Completely melt the corresponding amount of glass at a high temperature of 1000 °C to obtain liquid glass in a molten state.

[0006] b. Sealing: Seal and cool the liquid glass with the inner side of the stainless steel screw to make the glass and the inner side of the stainless steel firmly sealed.

[0007] c. Molding: Select graphite pellets suitable for the size of the prism lens, and open a tapered inverted hole in the graphite pellets.

[0008] d. Mirror surface forming: Place the stainless steel screw filled with glass with the glass side facing up on the tapered inverted hole of the graphite pellet. Through a certain temperature and pressure, extrude the glass on the protruding part on the outer side into the tapered inverted hole, and melt and form it into a 90° cone, and then cool to obtain a semi-finished product of the stainless steel prism lens.

[0009] e. Surface impurity removal: Immerse the semi-finished product in hydrochloric acid with a certain concentration, soak it at room temperature for 30 min - 60 min, take it out after soaking, wash it with water and then dry it.

[0010] f. Lens polishing: Polish the glass lens surface of the dried stainless steel prism lens with a polishing abrasive, wipe it clean after polishing to obtain a finished stainless steel prism lens.

[0011] Preferably, in step a, the cooled glass Preferably, in step d, a certain temperature satisfies 1000 °C and the pressure satisfies 135 Kpa.

[0012] Preferably, the concentration requirement of hydrochloric acid in step e is 30%.

[0013] Preferably, the normal temperature in step e is 25 °C.

[0014] Preferably, the drying conditions in step e are 65 °C - 70 °C for 30 minutes.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Through process steps such as melting, sealing, casting, mirror forming, surface impurity removal, and lens polishing, the present invention directly forms the glass in the inner cavity of the stainless steel screw after melting the glass, and then melts and forms the protruding glass into a conical prism lens through casting, realizing the cooperation and use of the prism lens of the liquid level switch and the stainless steel part, ensuring the sealing between the stainless steel part and the prism lens. Moreover, the stainless steel screw has the advantages of high temperature resistance, high pressure resistance, and corrosion resistance, greatly improving the service life of the stainless steel prism lens and ensuring the safety and high efficiency of production. Description of the Drawings

[0016] The present invention will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 It is a structural diagram of an embodiment of the present invention;

[0018] Figure 2 It is a flowchart of an embodiment of the present invention;

[0019] The embodiments of the present invention mainly include the following component symbols:

[0020] Glass - 1, Stainless steel screw - 2. Detailed Embodiments

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0022] Embodiment 1

[0023] As Figure 1 and Figure 2 shown, a sintering process for a stainless steel liquid level switch prism lens includes glass 1 and a stainless steel screw 2, and the process includes the following steps:

[0024] a. Melting: Completely melt the corresponding amount of glass 1 at a high temperature of 1000 °C to obtain liquid glass in a molten state.

[0025] b. Sealing: Seal and cool the inner side of the liquid glass 1 with the stainless - steel screw 2 to firmly seal the glass 1 and the inner side of the stainless - steel.

[0026] c. Molding: Select a graphite pellet suitable for the size of the prism lens and open a tapered inverted hole on the graphite pellet.

[0027] d. Mirror surface forming: Place the stainless - steel screw 2 containing the glass 1 upright on the tapered inverted hole of the graphite pellet with the glass 1 side facing up. After a certain temperature and pressure, extrude the glass 1 on the convex part on the outer side into the tapered inverted hole, and melt - form it into a 90° cone. Keep it warm and cool. The cooled glass lens is required not to have cracks to obtain a semi - finished product of the stainless - steel prism lens.

[0028] e. Surface impurity removal: Immerse the semi - finished product in hydrochloric acid of a certain concentration and soak it at room temperature for 30 min - 60 min. After soaking, take it out, wash it with water and then dry it.

[0029] f. Lens polishing: Polish the surface of the glass 1 lens of the dried stainless - steel prism lens with a polishing abrasive, wipe it clean after polishing to obtain the finished stainless - steel prism lens.

[0030] In the present invention, through technological steps such as melting, sealing, molding, mirror surface forming, surface impurity removal and lens polishing of the glass 1 and the stainless - steel screw 2, the glass 1 is directly formed in the inner cavity of the stainless - steel screw 2 after melting, and then the convex part of the glass 1 is melt - formed into a tapered prism lens through molding, realizing the cooperation and use of the liquid - level switch prism lens and the stainless - steel part, ensuring the sealing between the stainless - steel part and the prism lens. Moreover, the stainless - steel screw 2 has the advantages of high temperature resistance, high pressure resistance and corrosion resistance, greatly improving the service life of the stainless - steel prism lens and ensuring the safety and high efficiency of production.

[0031] In the step a, the diameter of the bubbles generated in the cooled glass 1 is less than 0.5 mm; in the step d, the certain temperature is 1000 °C and the pressure is 135 Kpa; in the step e, the hydrochloric acid has a concentration requirement of 30%; the room temperature in the step e is 25 °C; the drying condition in the step e is 65 °C - 70 °C and drying for 30 min.

[0032] Taking the ideal embodiments of the present invention as inspiration, through the above - mentioned description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A sintering process for a prism lens of a stainless steel liquid level switch, comprising glass (1) and a stainless steel screw (2), characterized in that, The process includes the following steps: a. Melting: Completely melt the corresponding amount of glass (1) at a high temperature of 1000 °C to obtain liquid glass in a molten state; b. Sealing: Seal and cool the inner side of the liquid glass (1) with the stainless-steel screw (2) to firmly seal the glass (1) and the inner side of the stainless steel; c. Molding: Select a graphite pellet suitable for the size of the prism lens and open a tapered inverted hole in the graphite pellet; d. Mirror surface forming: Place the stainless-steel screw (2) containing the glass (1) upright on the tapered inverted hole of the graphite pellet with the glass (1) side facing outwards. Through a certain temperature and pressure, extrude the glass (1) on the convex part on the outer side into the tapered inverted hole, melt and form a 90° cone, and cool to obtain a semi-finished stainless-steel prism lens; e. Surface impurity removal: Immerse the semi-finished product in hydrochloric acid of a certain concentration, soak at room temperature for 30 min - 60 min, take it out after soaking, wash it with water and then dry it; f. Lens polishing: Polish the glass (1) lens surface of the dried stainless-steel prism lens with a polishing abrasive, wipe it clean after polishing to obtain a finished stainless-steel prism lens; In step a, the diameter of the bubbles generated in the cooled glass (1) is less than 0.5 mm; in step d, the certain temperature is 1000 °C and the pressure is 135 Kpa; in step e, the hydrochloric acid has a concentration requirement of 30%; the room temperature in step e is 25 °C; the drying condition in step e is 65 °C - 70 °C for 30 min.

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