Double-seal long-acting perspective water level gauge

Abstract

The utility model discloses a double-seal long-acting perspective water level gauge which comprises a gauge body, a gland, perspective glass, a top cover, a graphite pad, a mica sheet and a positioning ring. A gland groove is formed in the gland, the gland is fixed on the meter body, and a graphite composite pad is arranged between the meter body and the gland; the perspective glass is fixed in the gland groove through a sealing sleeve; the top cover is arranged between the perspective glass and the meter body and is positioned in the light hole of the graphite composite pad; the graphite pad is arranged between the top cover and the perspective glass; the mica sheet is arranged between the graphite pad and the perspective glass; and the positioning ring is arranged between the sealing sleeve and the graphite composite pad. According to the technical scheme, when the internal pressure is larger, the top cover moves to compress the sealing sleeve, so that the gland inner ring and the sealing sleeve as well as the perspective glass outer ring and the sealing sleeve are tighter; meanwhile, the nut enables the sealing surface of the gland and the graphite composite pad to be tightly arranged on the sealing surface of the meter body through pre-tightening force, and the double-sealing long-acting function is achieved.

Description

Technical Field

[0001] This utility model relates to the field of water level gauge technology, and in particular to a double-sealed long-lasting transparent water level gauge. Background Technology

[0002] The local instrument used for measuring the water level in the steam drum of a power plant boiler is a direct-reading water level gauge, also known as a through-hole water level gauge. Each direct-reading water level gauge is designed with 3-7 through-holes, and some have 12. Its measurement principle is based on the principle of communicating vessels, which makes the water level of the direct-reading water level gauge match the water level in the steam drum. The direct-reading water level gauges widely used in China are of the pre-tightening sealing type, which achieves the sealing effect by compressing and deforming the graphite composite gasket through the pressure cap.

[0003] The water level control of the power plant's steam drum is very strict. The direct-reading water level gauge is the reference measuring instrument for the steam drum. In case of boiler malfunction, the water level gauge must clearly and directly display the water level to guide the operators in controlling the normal operation of the steam drum.

[0004] The following problems exist with direct-reading water level gauges used in domestic power plant boilers: As the design pressure of power plant boilers gradually increases, the saturated steam temperature also increases accordingly. Furthermore, in accordance with national development, the power generation industry is gradually entering a peak-shaving state, with the grid load changing every hour and the boiler load changing frequently every day. This results in frequent and large fluctuations in the steam drum pressure. Under frequent pressure fluctuations, the risk of leakage of the direct-reading water level gauge increases. In addition, the pressure cap directly presses on the mica sheet, inevitably causing shearing phenomena. After long-term high-temperature steam erosion and corrosion, the sealing gap of the mica sheet increases, leading to leakage problems. Utility Model Content

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is to provide a double-sealed long-lasting transparent water level gauge, including a gauge body, a pressure cap, a transparent glass, a top cover, a graphite pad, a mica sheet, and a positioning ring; the pressure cap has a pressure cap groove, the pressure cap is fixed on the gauge body, and a graphite composite pad is provided between the gauge body and the pressure cap; the transparent glass is fixed in the pressure cap groove by a sealing sleeve; the top cover is located between the transparent glass and the gauge body, and is located in the light-transmitting hole of the graphite composite pad; the graphite pad is located between the top cover and the transparent glass; the mica sheet is located between the graphite pad and the transparent glass; the positioning ring is located between the sealing sleeve and the graphite composite pad, the surface of the positioning ring facing the gauge body is set in a stepped shape, and the end face of the top cover facing the pressure cap abuts against the stepped surface of the positioning ring.

[0006] Furthermore, the double-sealed long-life transparent water level gauge also includes an iron pad and an asbestos pad. The iron pad is disposed between the sealing sleeve and the pressure cap, and the asbestos pad is disposed between the transparent glass and the pressure cap, with the asbestos pad located inside the light-transmitting hole of the iron pad.

[0007] Furthermore, the double-sealed long-life transparent water level gauge also includes a double-ended stud, one end of which is fixed to the gauge body, and the other end extends out of the pressure cap and is fixed by a nut.

[0008] This utility model, by setting a sealing structure, when the internal pressure is greater, the top cover moves to compress the sealing sleeve, making the inner ring of the cover and the sealing sleeve, and the outer ring of the transparent glass and the sealing sleeve tighter; at the same time, the nut, through pre-tightening force, tightly presses the sealing surface of the cover and the graphite composite gasket onto the sealing surface of the watch body, achieving a double-seal long-lasting function. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0010] Figure 1 This is an exploded view of the structure of the double-sealed long-life transparent water level gauge described in this utility model;

[0011] Figure 2 This is a schematic cross-sectional view of the structure of the double-sealed long-lasting transparent water level gauge described in this utility model.

[0012] Explanation of icon numbers:

[0013] label name label name 1 Body 8 Graphite pad 2 mica sheets 9 iron pad 3 Transparent glass 10 sealing sleeve 4 flat pad 11 Positioning ring 5 Nut 12 Pressure cap 6 Double-ended studs 13 Top cover 7 asbestos pad 14 Graphite composite pad Detailed Implementation

[0014] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0015] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0016] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "several" or "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0019] This utility model proposes a double-sealed long-lasting transparent water level gauge, aiming to achieve a double-sealed long-lasting function.

[0020] The double-sealed long-life perspective water level gauge proposed in this utility model will be described below in specific embodiments:

[0021] In the technical solution of this embodiment, such as Figure 1 As shown, a double-sealed long-lasting transparent water level gauge includes a body 1, a pressure cap 12, a transparent glass 3, a top cover 13, a graphite pad 8, a mica sheet 2, and a positioning ring 11. The pressure cap 12 has a groove and is fixed to the body 1. A graphite composite pad 14 is placed between the body 1 and the pressure cap 12. The transparent glass 3 is fixed in the groove of the pressure cap 12 by a sealing sleeve 10. The top cover 13 is positioned between the transparent glass 3 and the body 1, and is located within the light-transmitting hole of the graphite composite pad 14. The graphite pad 8 is positioned between the top cover 13 and the transparent glass 3. The mica sheet 2 is positioned between the graphite pad 8 and the transparent glass 3. The positioning ring 11 is positioned between the sealing sleeve 10 and the graphite composite pad 14. The surface of the positioning ring 11 facing the body 1 is stepped, and the end face of the top cover 13 facing the pressure cap 12 abuts against the stepped surface of the positioning ring 11.

[0022] Furthermore, the double-sealed long-life transparent water level gauge also includes: an iron pad 9 and an asbestos pad 7. The iron pad 9 is disposed between the sealing sleeve 10 and the pressure cap 12, and the asbestos pad 7 is disposed between the transparent glass 3 and the pressure cap 12, with the asbestos pad 7 located inside the light-transmitting hole of the iron pad 9.

[0023] Furthermore, the double-sealed long-life transparent water level gauge also includes a double-ended stud 6, one end of which is fixed inside the gauge body 1, and the other end extends out of the pressure cap 12 and is fixed by a nut 5; a flat washer 4 is provided between the nut 5 and the pressure cap 12.

[0024] Specifically, a graphite pad 8 is placed on one end face of the transparent glass 3, a graphite sleeve is placed along the annular shoulder of the transparent glass 3, a positioning ring 11 is placed on one end face of the sealing sleeve 10, and a mica sheet 2 is placed between the transparent glass 3 and the graphite pad 8. The graphite pad 8 is pressed against the mica sheet 2 by the movement of the top cover 13 (the top cover 13 has an L-shaped structure), while the positioning ring 11 compresses the graphite sleeve. The inner ring hole between the graphite pad 8 and the graphite composite pad is consistent with the light-transmitting hole of the pressure cover 12 and the watch body 1. The annular size of the mica sheet 2 is consistent with that of the transparent glass 3. The inner ring of the positioning ring 11 is designed as a stepped shape, and the outer ring is consistent with the inner ring of the groove of the pressure cover 12. Its low-step inner ring is consistent with the outer ring of the transparent glass 3, and its high-step inner ring is consistent with the outer ring of the top cover 13. The inner ring of the top cover 13 is consistent with the outer ring of the transparent glass 3.

[0025] One end of the double-ended stud 6 is screwed into the watch body 1, and the other end is secured to the watch body 1 by the nut 5, which holds the sealing surface of the cover 12 and the graphite composite gasket against the watch body 1. The sealing structure of this utility model is such that when the internal pressure is greater, the top cover 13 moves to compress the sealing sleeve 10, making the inner ring of the cover 12 and the sealing sleeve 10, and the outer ring of the transparent glass 3 and the sealing sleeve 10 tighter. At the same time, the nut 5 uses pre-tightening force to tightly hold the sealing surface of the cover 12 and the graphite composite gasket against the sealing surface of the watch body 1, thus achieving a long-lasting double-seal function.

[0026] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A dual sealed long lasting type see-through water level gauge characterized in that, It comprises: a table body; a cover with a cover groove, which is fixed on the table body and between which and the table body a graphene composite pad is arranged; a see-through glass fixed in the cover groove by a sealing sleeve; a top cover arranged between the see-through glass and the table body and in a light-transmitting hole of the graphene composite pad; a graphite pad arranged between the top cover and the see-through glass; a mica sheet arranged between the graphite pad and the see-through glass; and a positioning ring arranged between the sealing sleeve and the graphene composite pad, a surface of the positioning ring towards the table body being arranged in a stepped manner, and an end surface of the top cover towards the cover abutting on a stepped surface of the positioning ring. It further comprises:

2. The dual sealed long-lasting sight level according to claim 1, wherein, an iron pad arranged between the sealing sleeve and the cover, an asbestos pad arranged between the see-through glass and the cover and located in a light-transmitting hole of the iron pad. It further comprises a double-end stud fixed in the table body at one end and passing out of the cover at the other end and fixed by a nut.

3. The dual sealed long-acting see-through water level gauge according to claim 1, wherein, ​

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