An industrial sight glass

Abstract

The present invention provides an industrial sight glass, which comprises a first metal casing, a second metal casing, a lens, a first sealing gasket and a second sealing gasket, wherein: a circle of limiting ring extending radially inward is formed at the first end of the first metal casing, an internal thread is formed on the inner wall of the second end of the first metal casing; an external thread matching the internal thread is formed on the outer wall of the second metal casing, and the second metal casing is screwed to the second end of the first metal casing via the external thread and the internal thread; the lens is embedded in the first metal casing; the first sealing gasket is clamped between the lens and the limiting ring; the second sealing gasket is clamped between the lens and the second metal casing. The present invention can seal the lens into the metal casing through its own mechanical structure, thereby reducing the production cost of the product.

Description

Technical Field

[0001] The invention relates to an industrial sight glass. Background Art

[0002] Industrial sight glasses are widely used in metallurgy, chemical industry and other fields. They are installed on the side walls of high-temperature furnaces, pipelines and other cavity equipment to facilitate workers to observe the situation inside the cavity. In order to prevent leakage of materials in the cavity, industrial sight glasses need to have excellent sealing performance.

[0003] Industrial sight glasses are generally composed of a metal casing and a lens installed in the metal casing. In order to ensure the sealing performance between the lens and the metal casing, the traditional method is to use ceramic materials to sinter the lens into the metal casing. However, the high procurement cost of ceramic materials and the high difficulty of the sintering process directly lead to the high cost of traditional industrial sight glasses. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an industrial sight glass, which does not require a ceramic sintering process, and can seal the lens into a metal sleeve through its own mechanical structure, thereby reducing the production cost of the product. The detailed technical solution of the present invention is as follows:

[0005] An industrial sight glass, comprising:

[0006] A first metal sleeve, wherein a limiting ring extending radially inward is formed at a first end of the first metal sleeve, and an internal thread is formed on an inner wall of a second end of the first metal sleeve;

[0007] A second metal sleeve, wherein an external thread matching the internal thread is formed on an outer wall of the second metal sleeve, and the second metal sleeve is screwed to the second end of the first metal sleeve via the external thread and the internal thread;

[0008] A lens, wherein the lens is embedded in the first metal sleeve;

[0009] A first sealing gasket, wherein the first sealing gasket is clamped between the lens and the limiting ring; and

[0010] A second sealing gasket is clamped between the lens and the second metal sleeve.

[0011] In some embodiments, a first pressing ring protruding from the end surface is formed on the end surface of the limiting ring facing the first sealing gasket, and the first pressing ring is pressed against the first sealing gasket.

[0012] In some embodiments, the thickness of the pressure ring gradually decreases from the limiting ring toward the first sealing gasket.

[0013] In some embodiments, a second pressing ring protruding from the end surface is formed on the end surface of the second metal sleeve facing the second sealing gasket, and the second pressing ring is pressed against the second sealing gasket.

[0014] In some embodiments, the thickness of the second pressure ring gradually decreases from the second metal sleeve toward the second sealing gasket.

[0015] In some embodiments, a filter screen is covered at the second end opening of the first metal sleeve and is located outside the first sealing gasket.

[0016] In some embodiments, the first metal sleeve is made of stainless steel.

[0017] In some embodiments, the first sealing gasket and the second sealing gasket are made of copper.

[0018] Compared with the industrial sight glasses in the prior art, the present invention can seal the lens into the metal sleeve through its own mechanical structure, thereby reducing the production cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for practical use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them,

[0020] Figure 1 It is a schematic cross-sectional structure diagram of the industrial sight glass of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the first metal sleeve in the industrial sight glass of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the second metal sleeve in the industrial sight glass of the present invention. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 3 As shown, the industrial sight glass of the present invention comprises at least a first metal casing 1, a second metal casing 2, a first sealing gasket 3, a second sealing gasket 4 and a lens 5. Wherein:

[0025] A limiting ring 11 extending radially inwardly of the first metal sleeve 1 is formed at the first end of the first metal sleeve 1 , and an internal thread (not shown) is formed on the inner wall of the second end of the first metal sleeve 1 .

[0026] The outer diameter of the second metal sleeve 2 matches the inner diameter of the first metal sleeve 1, and an outer wall of the second metal sleeve 2 is formed with an outer thread that matches the inner thread on the second end of the first metal sleeve 1. The second metal sleeve 2 is screwed to the second end of the first metal sleeve 1 via the outer thread and the inner thread.

[0027] The lens 5 is embedded in the first metal casing 1. Optionally, the diameter of the lens 5 matches the inner diameter of the first metal casing 1, that is, the peripheral side of the lens 5 is convenient to be in close contact with the inner wall of the first metal casing 1.

[0028] The first sealing gasket 3 is clamped between the lens 5 and the limiting ring 11 .

[0029] The second sealing gasket 4 is clamped between the lens 5 and the second metal sleeve 2 .

[0030] It can be seen that the metal casing of the industrial sight glass of the present invention is a split structure, which includes a first metal casing 1 and a second metal casing 2 that are screwed together, and the lens 5 is clamped between the limiting ring 11 of the first metal casing 1 and the second metal casing 2. By providing the first sealing gasket 3 and the second sealing gasket 4, the sealing of the contact position between the lens 5 and the first metal casing 1 and the second metal casing 2 is guaranteed, and finally the sealing performance of the present invention is guaranteed.

[0031] Continue to refer Figure 1 As shown, optionally, a first pressing ring 12 protruding from the end surface of the limiting ring 11 facing the first sealing gasket 3 is formed, and the first pressing ring 12 presses against the first sealing gasket 3. By providing the first pressing ring 12, the contact area between the first sealing gasket 3 and the limiting ring 11 is reduced, thereby improving the extrusion strength between the first sealing gasket 3 and the limiting ring 11, and finally improving the sealing effect of the first sealing gasket 3.

[0032] Optionally, the first pressure ring 12 can be set to have a thickness gradually decreasing from the limiting ring 11 toward the first sealing gasket 3, so that the top end of the first pressure ring 12 can be pressed into the first sealing gasket 3, thereby achieving the bite of the first pressure ring 12 on the first sealing gasket 3, and further improving the sealing effect of the first sealing gasket 3.

[0033] Similarly, optionally, a second pressing ring 21 protruding from the end surface is formed on the end surface of the second metal sleeve 2 facing the second sealing gasket 4, and the second pressing ring 21 presses against the second sealing gasket 4. By providing the second pressing ring 21, the contact area between the second sealing gasket 4 and the second metal sleeve 2 is reduced, thereby improving the extrusion strength between the second sealing gasket 4 and the second metal sleeve 2, and finally improving the sealing effect of the first sealing gasket 3.

[0034] Optionally, the second pressure ring 21 can be set to have a thickness gradually decreasing from the second metal sleeve 2 toward the second sealing gasket 4, so that the top end of the second pressure ring 21 can be pressed into the second sealing gasket 4, thereby achieving the bite of the second pressure ring 21 on the second sealing gasket 4, further improving the sealing effect of the second sealing gasket 4.

[0035] Continue to refer Figure 1 As shown, optionally, the industrial sight glass of the present invention further includes a filter screen 6 covering the second end opening of the first metal sleeve 1 and located outside the first sealing gasket 3. The filter screen 6 can protect the lens 5 and prevent the lens 5 from being contaminated. Of course, in order to ensure the observation effect, the material and mesh size of the filter screen 6 need to be adaptively adjusted.

[0036] The first metal sleeve 1 and the first metal sleeve 2 are formed of metal materials that are resistant to high temperature, high pressure and corrosion, such as stainless steel. Similarly, the first sealing gasket 3 and the second sealing gasket 4 can also be formed of metal materials that are resistant to high temperature, high pressure and corrosion. Of course, in order to improve the sealing effect, metal materials with good ductility, such as copper, can be selected.

[0037] The present invention has been described in sufficient detail with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present invention should fall within the scope of protection of the present invention. The scope of protection claimed by the present invention is defined by the claims, rather than by the above description in the embodiments.

Claims

1. An industrial sight glass, characterized in that: It includes: A first metal sleeve, wherein a limiting ring extending radially inward is formed at a first end of the first metal sleeve, and an internal thread is formed on an inner wall of a second end of the first metal sleeve; a second metal sleeve, wherein an external thread matching the internal thread is formed on an outer wall of the second metal sleeve, and the second metal sleeve is screwed to the second end of the first metal sleeve via the external thread and the internal thread; A lens, wherein the lens is embedded in the first metal sleeve; A first sealing gasket, wherein the first sealing gasket is clamped between the lens and the limiting ring; and a second sealing gasket, wherein the second sealing gasket is clamped between the lens and the second metal sleeve; A first pressing ring protruding from the end surface of the limiting ring facing the first sealing gasket is formed on the end surface of the limiting ring, the first pressing ring is pressed against the first sealing gasket, and the thickness of the pressing ring gradually decreases from the limiting ring toward the first sealing gasket; A second pressing ring protruding from the end surface of the second metal sleeve facing the second sealing gasket is formed on the end surface of the second metal sleeve, the second pressing ring is pressed against the second sealing gasket, and the thickness of the second pressing ring gradually decreases from the second metal sleeve toward the second sealing gasket.

2. The industrial sight glass according to claim 1, characterized in that: It also includes, A filter screen covers the second end opening of the first metal sleeve and is located outside the first sealing gasket.

3. The industrial sight glass according to claim 1, characterized in that: The material of the first metal sleeve is stainless steel.

4. The industrial sight glass according to claim 1, characterized in that: The first sealing gasket and the second sealing gasket are made of copper.

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