Anti-explosion and anti-corrosion chemical sight glass device

Abstract

The invention relates to the technical field of safety monitoring of chemical equipment, and particularly provides an anti-explosion and anti-corrosion chemical sight glass device which comprises a base, a flange seat, a flange cover plate, a first sight glass and a second sight glass. A mirror base is arranged in the flange base, an air bag is arranged on the outer side of the flange base, and a discharge hole is formed in the inner side of the flange base. A spring pin is arranged at the upper end of the inner side of the flange seat, the mirror seat is connected to the spring pin, and the mirror seat can adjust shielding and avoiding in a self-adaptive mode relative to the relief hole according to pressure changes. Through a linkage mechanism of the air bag, the relief hole and the spring pin, the mirror base can automatically move upwards to relieve pressure when the pressure is suddenly increased, precise resetting and sealing are achieved after pressure relief, and the risk that the sight glass bursts is greatly avoided; the annular distributor is matched with the multiple nozzles to spray nitrogen to the bottom of the first sight glass, a dynamic gas film is formed through an arc-shaped annular section, and corrosion medium isolation and mist elimination are synchronously achieved; and the double-sight-mirror redundancy design provides an emergency observation window when the main sight mirror fails, so that the safety of the device is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chemical equipment safety monitoring, and particularly relates to an explosion-proof and corrosion-resistant chemical sight glass device. BACKGROUND

[0002] In chemical, pharmaceutical and other industrial production equipment, a sight glass is often provided to facilitate an operator to directly observe the liquid, gas or powder material conditions in the inside of a closed tank or a kettle and the like production equipment during the production process, so as to understand the running condition of the production equipment and judge whether the production activity is normal. As an important device for observing the material conditions in the inside of a container and equipment, the sight glass is widely used in the chemical industry.

[0003] Most of the prior art is a single-layer sight glass structure, which completely loses the observation function once the lens fails, and cannot provide an emergency observation window under flammable and explosive conditions, thereby increasing the safety risk. For example, a sight glass device disclosed in a published Chinese patent with the publication number CN210050422U includes a first cover plate and a second cover plate; a sight glass is arranged between the first cover plate and the second cover plate; and a support column is supported between the first cover plate and the second cover plate to keep the distance between the first cover plate and the second cover plate greater than or equal to the thickness of the sight glass. By using the sight glass device with this structure, the space required for installing the sight glass can be saved, and the glass sight glass can also be prevented from being damaged by impact during installation. There are also double-layer sight glass structures on the market, for example, a low-temperature anti-fog sight glass disclosed in a published Chinese patent with the publication number CN215908604U includes a cover flange, a sight glass, and a base flange. The sight glass is fixedly connected between the cover flange and the base flange. A sealing threaded sight glass is fixedly connected to the upper part of the cover flange, and quartz glass is inlaid in the threaded sight glass. A drying box is arranged in the interlayer between the cover flange and the threaded sight glass, and the drying box is inlaid on the inner wall surface of the threaded sight glass. In addition, a low-temperature anti-fog sight glass disclosed in a published Chinese patent with the publication number CN110185869B includes a plurality of spring buckles, a glass cover plate, a low-temperature-resistant gasket, a drying box, two cover flanges, a sight glass, and a sight glass base. The two cover flanges fix the sight glass, and the two cover flanges are fastened by bolts. The free surface of one of the cover flanges is fixed with a plurality of spring buckles, and the spring buckles fix the glass cover plate in the groove of the cover flange. The free surface of the other cover flange is provided with the sight glass base. The drying box is arranged in the interlayer between the observation hole of the cover flange and the glass cover plate, and the drying box is arranged along the edge of the observation hole of the cover flange. The cover flange is sealed from the sight glass and the glass cover plate by the low-temperature-resistant gasket.

[0004] The above disclosed patents are all in low temperature state, however, in chemical production process, high pressure and strong corrosive medium are often involved, the existing sight glass device lacks pressure dynamic response mechanism, when the pressure in the pipeline suddenly increases, the impact force directly acts on the sight glass, which easily leads to mirror rupture and causes safety accidents, on the one hand, when conveying high pressure medium, the ordinary sight glass directly contacts the high pressure medium, the sight glass is easy to break, the structure stability cannot be guaranteed, and the explosion-proof performance is poor, on the other hand, facing strong corrosive chemical materials, the sight glass material is easy to be corroded, which leads to damage of the sight glass, not only affects the observation of the materials in the equipment, but also may cause safety accidents such as material leakage, and there is a great safety hazard in actual production application. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide an explosion-proof and corrosion-resistant chemical sight glass device, which is assembled with a mirror seat in a flange seat and is provided with a discharge hole on the flange seat, the mirror seat is assembled by spring pins and can adaptively avoid according to the pressure change in the pipeline, when the pipeline pressure abnormally rises, the medium pushes the mirror seat to compress the spring pins to move upward, opens the discharge hole to connect the air bag, and after pressure relief, the mirror seat automatically resets to seal, realizes the pressure self-adaptive fitting effect, effectively avoids the high pressure impact on the sight glass, and improves the explosion-proof response speed, the present application further sets an annular distributor and cooperates with a nozzle, the nozzle can uniformly spray inert gas to the first sight glass for defogging, cooperates with the annular cutting surface arranged at the lower end of the first sight glass, the inert gas sprayed by the nozzle can form a dynamic gas film at the lower end of the first sight glass, which can isolate the corrosive medium from contacting the lens, the gas film continuously flows to synchronously eliminate the mist, solves the problem that the traditional defogging means is invalid under strong corrosion working condition, and solves the problems that the sight glass device lacks pressure dynamic response mechanism and has poor protection and explosion-proof performance in the prior art.

[0006] To achieve the above-mentioned purposes and other related purposes, the present application provides an explosion-proof and corrosion-resistant chemical sight glass device, which comprises a base, a flange seat and a flange cover plate arranged in sequence from bottom to top, a first sight glass is arranged between the base and the flange seat, and a second sight glass is arranged in the flange seat. A mirror seat is arranged in the flange seat, and the first sight glass is arranged on the mirror seat, an air bag is arranged on the outer side of the flange seat close to the lower end, a discharge hole is arranged on the inner side of the flange seat close to the lower end, the lower end of the mirror seat cooperates with the discharge hole to shield one end of the discharge hole, and the other end of the discharge hole is connected with the air bag. A plurality of spring pins are arranged on the inner side of the flange seat at equal intervals, the mirror seat is connected to the spring pins, and the mirror seat compresses the spring pins to adaptively adjust the shielding and avoiding relative to the discharge hole according to the pressure change.

[0007] In an embodiment of the present application, the mirror seat comprises an upper mirror seat and a lower mirror seat, the first sight glass is arranged between the upper mirror seat and the lower mirror seat, third sealing gaskets are arranged between the lower end of the upper mirror seat and the first sight glass and between the lower mirror seat and the first sight glass, and the upper mirror seat and the lower mirror seat are detachably connected by bolts.

[0008] In an embodiment of the present application, the inner side of the lower mirror seat is provided with an annular distributor, the input end of the annular distributor is communicated to the outside of the flange seat through a pipeline, a plurality of nozzles are arranged on the annular distributor at equal intervals, and the output ends of the nozzles correspond to the lower side of the first sight glass.

[0009] In an embodiment of the present application, the lower end of the first sight glass is provided with an arc-shaped recessed ring surface, and the nozzles spray gas to form a gas film on the ring surface.

[0010] In an embodiment of the present application, the spring pin is composed of a pin column and a spring, the pin column is arranged on the upper end of the upper mirror seat, and the spring is sleeved on the outer side of the pin column and connected between the upper end of the inner side of the flange seat and the upper mirror seat.

[0011] In an embodiment of the present application, a drying box is embedded on the inner wall of the flange seat between the second sight glass and the first sight glass.

[0012] In an embodiment of the present application, first sealing gaskets are arranged between the base and the flange seat, and second sealing gaskets are arranged between the upper end of the flange seat and the lower end of the second sight glass and between the flange cover plate and the upper end of the second sight glass.

[0013] In an embodiment of the present application, the base and the flange seat and the flange seat and the flange cover plate are detachably connected by bolts.

[0014] One side of the flange cover plate is provided with a support seat, a flip cover is hingedly connected to the support seat through a pin shaft, and the flip cover is reversibly matched to the outer side of the observation end.

[0015] As described above, the explosion-proof and corrosion-resistant chemical sight glass device has the following beneficial effects: 1. The explosion-proof and corrosion-resistant chemical sight glass device can adaptively avoid the high-pressure impact on the sight glass and improve the explosion-proof response speed.

[0016] 2、The application sets up the annular distributor and cooperates the nozzle, the nozzle can spray inert gas to the first sight glass to remove the mist, cooperates the ring cutting surface set in the lower end of the first sight glass, the inert gas sprayed by the nozzle can form the dynamic gas film in the lower end of the first sight glass, and the corrosion medium is prevented from contacting the lens; the gas film continuously flows and synchronously eliminates the mist, and the problem that the traditional mist removing means is invalid under the strong corrosion condition is solved.

[0017] 3、The application sets up the first sight glass and the second sight glass double structure, the first sight glass is used as the main observation, and the second sight glass is used as the emergency standby, when the first sight glass is invalid due to corrosion or burst, the second sight glass can still provide the basic observation window, and the reliability of the device is greatly improved.

[0018] 4、The application can realize that the mirror seat is automatically moved up and pressure is released when the pressure suddenly increases, and is accurately reset and sealed after pressure release, the risk of sight glass burst is greatly avoided; the annular distributor cooperates the multiple nozzles to spray nitrogen to the bottom of the first sight glass, the dynamic gas film is formed by the arc ring cutting surface, the corrosion medium isolation and the mist elimination are synchronously realized; the double sight glass redundant design provides the emergency observation window when the main sight glass is invalid, and the safety of the device is significantly improved; the pressure self-adaptive sealing structure combines the three-level sealing gasket, and the strong corrosion medium penetration is effectively blocked. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective structure schematic diagram of the explosion-proof and corrosion-resistant chemical sight glass device disclosed by the application.

[0020] Figure 2 It is a perspective structure schematic diagram of the explosion-proof and corrosion-resistant chemical sight glass device disclosed by the application in the flip-up state.

[0021] Figure 3 It is an exploded structure schematic diagram of the explosion-proof and corrosion-resistant chemical sight glass device disclosed by the application.

[0022] Figure 4 It is an enlarged structure schematic diagram of the flange seat part. Figure 3

[0023] Figure 5 It is an exploded structure schematic diagram of the flange seat part. Figure 4

[0024] Figure 6 It is an enlarged structure schematic diagram of the annular distributor. Figure 5

[0025] Figure 7 It is a cross-section structure schematic diagram of the explosion-proof and corrosion-resistant chemical sight glass device disclosed by the application in the non-avoidance state of the mirror seat.

[0026] Figure 8 It is a cross-section structure schematic diagram of the explosion-proof and corrosion-resistant chemical sight glass device disclosed by the application in the non-avoidance state of the mirror seat.​​​Figure 7 Enlarged view of the mirror seat portion.

[0027] Figure 9 Cross-sectional view of the mirror seat in a non-retracted position.

[0028] Figure 10 Cross-sectional view of the mirror seat in a non-retracted position.

[0029] Element Number Description Base 1; flange seat 2; vent hole 21; flange cover plate 3; first sight glass 4; second sight glass 5; mirror seat 6; upper mirror seat 61; lower mirror seat 62; air bag 7; support seat 8; flip cover 9; spring pin 10; pin post 101; spring 102; annular distributor 11; nozzle 111; first sealing gasket 12; second sealing gasket 13; third sealing gasket 14; drying box 15. DETAILED DESCRIPTION

[0030] The following specific examples illustrate the embodiments of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification.

[0031] Please refer to Figures 1 to 10 It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to understand and read the content disclosed in the specification by those skilled in the art, and are not used to limit the defined conditions under which the present application can be implemented, and therefore do not have technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that can be produced by the present application and the purposes that can be achieved, should fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the specification are only for the purpose of clear understanding of the description, and are not used to limit the scope of the present application that can be implemented, and the change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the present application that can be implemented.

[0032] Please refer to Figures 1-3The application provides an explosion-proof and corrosion-resistant chemical sight glass device, which comprises a base 1, a flange seat 2 and a flange cover plate 3 arranged in sequence from bottom to top, a first sight glass 4 is arranged between the base 1 and the flange seat 2, and a second sight glass 5 is arranged in the flange seat 2; a drying box 15 is embedded on the inner wall of the flange seat 2 between the second sight glass 5 and the first sight glass 4, and the drying box 15 is filled with calcium chloride particle desiccant; the drying box 15 can fully absorb the moisture in the interlayer between the first sight glass 4 and the second sight glass 5, reduce the air humidity in the interlayer, and make the first sight glass 4 not dew when it is cold in the interlayer space; one side of the flange cover plate 3 is provided with a support seat 8, the support seat 8 is hingedly connected with a flip cover 9 through a pin shaft, and the flip cover 9 is reversibly matched outside the observation end; the chemical sight glass device provided by the application is connected with a chemical pipeline through the base 1, more specifically, the base 1 is connected to the upper end of the chemical pipeline; the first sight glass 4 and the second sight glass 5 are arranged in a double structure, the first sight glass 4 is used as the main observation, the second sight glass 5 is used as the emergency backup, when the first sight glass 4 is corroded or burst and fails, the second sight glass 5 can still provide a basic observation window, and the reliability of the device is greatly improved. The first sealing gasket 12 is arranged between the base 1 and the flange seat 2; the second sealing gasket 13 is arranged between the upper end of the flange seat 2 and the lower end of the second sight glass 5 and between the flange cover plate 3 and the upper end of the second sight glass 5; the base 1 and the flange seat 2 and the flange seat 2 and the flange cover plate 3 are detachably connected through bolts.

[0033] Please refer to Figures 3-5 、 Figures 7-10The flange base 2 is provided with a mirror seat 6, and the first sight glass 4 is mounted on the mirror seat 6. An air bag 7 is arranged on the outer side of the lower end of the flange base 2, and a relief hole 21 is arranged on the inner side of the lower end of the flange base 2. The lower end of the mirror seat 6 is matched to block one end of the relief hole 21, and the other end of the relief hole 21 is in communication with the air bag 7. The air bag 7 is made of silicone rubber material, has stable performance in a high-temperature environment, has excellent heat resistance, and can maintain sealing for a long time in a high-temperature environment. A plurality of spring pins 10 are arranged at equal intervals on the inner side of the upper end of the flange base 2, and the mirror seat 6 is connected to the spring pins 10. The mirror seat 6 compresses the spring pins 10 to adaptively adjust the blocking and avoiding of the relief hole 21 according to pressure changes. Specifically, the spring pin 10 is composed of a pin column 101 and a spring 102. The pin column 101 is mounted on the upper end of the upper mirror seat 61, and the spring 102 is sleeved on the outer side of the pin column 101 and connected between the inner side of the upper end of the flange base 2 and the upper mirror seat 61. In a non-high-pressure state, the height of the spring 102 is greater than the height of the pin column 101, the spring 102 can ensure the connection of the mirror seat 6 and provide a lifting activity allowance, and the pin column 101 can limit the excessive activity of the mirror seat 6. According to the application, the mirror seat 6 is mounted in the flange base 2, and the relief hole 21 is arranged on the flange base 2. The mirror seat 6 is mounted by the spring pin 10 and can adaptively avoid according to the pressure change in the pipeline. When the pipeline pressure abnormally rises, the medium pushes the mirror seat 6 to compress the spring pin 10 to move upward, opens the relief hole 21 to communicate with the air bag 7, and automatically resets the sealing after pressure relief. The pressure self-adaptive fitting effect is realized, the high-pressure impact sight glass is effectively avoided, and the explosion-proof response speed is improved.

[0034] The mirror seat 6 includes an upper mirror seat 61 and a lower mirror seat 62, and the first sight glass 4 is mounted between the upper mirror seat 61 and the lower mirror seat 62. The upper mirror seat 61 and the first sight glass 4, and the lower mirror seat 62 and the first sight glass 4 are both provided with a third sealing gasket 14. The upper mirror seat 61 and the lower mirror seat 62 are detachably connected by bolts. The bolts can gradually compress the third sealing gasket 14 when the upper mirror seat 61 and the lower mirror seat 62 are assembled, thereby improving the reliability of the installation sealing of the first sight glass 4. More specifically, in actual application, a sliding assembly (not shown in the drawing) is arranged between the flange base 2 and the upper mirror seat 61. The sliding assembly includes a sliding rail and a sliding block slidingly fitted on the sliding rail. The sliding rail is mounted on the inner wall of the flange base 2, and the side end of the upper mirror seat 61 is mounted on the sliding block. The design of the sliding assembly can avoid the deflection of the mirror seat 6 during vertical movement and avoid sealing failure.

[0035] Please refer to Figures 3-10The inner side of the lower mirror seat 62 is provided with an annular distributor 11, a plurality of nozzles 111 are equidistantly arranged on the annular distributor 11, and the input end of the annular distributor 11 is communicated to the outside of the flange seat 2 through a pipeline (not shown in the figure). Specifically, the pipeline connected to the input end of the annular distributor 11 needs to pass through the lower mirror seat 62, the upper mirror seat 61 and the flange seat 2 in sequence, and the pipeline is a hose pipeline which has a stretching activity allowance at least inside the flange seat 2; the area where the hose pipeline connects the annular distributor 11 and the flange seat 2 is provided with a pipe joint; one end of the hose pipeline communicated to the outside of the flange seat 2 is connected to a gas storage device, and the gas storage device contains an inert gas which is colorless, odorless and has a smaller density than air, such as nitrogen gas; a plurality of nozzles 111 are equidistantly arranged on the annular distributor 11, and the output end of the nozzle 111 corresponds to the lower side of the first sight glass 4; the lower end of the first sight glass 4 is provided with an arc-shaped recessed ring cutting surface 41, and the inert gas sprayed by the nozzle 111 forms a gas film on the ring cutting surface 41. By arranging the annular distributor 11 and cooperating with the nozzle 111 to spray the inert gas which is colorless, odorless and has a smaller density than air, the inert gas which is colorless, odorless and has a smaller density than air can defog the first sight glass 4, and cooperating with the ring cutting surface 41 arranged at the lower end of the first sight glass 4, the inert gas sprayed by the nozzle 111 can form a dynamic gas film at the lower end of the first sight glass 4, so as to isolate the corrosive medium from contacting the lens; the continuous flow of the gas film synchronously eliminates the fog, and solves the problem that the traditional defogging method fails under strong corrosion conditions.

[0036] In summary, through the linkage mechanism of the air bag 7, the relief hole 21 and the spring pin 10, the mirror seat 6 can automatically move up to release pressure when the pressure suddenly increases, and can accurately reset and seal after pressure relief, thereby greatly avoiding the risk of mirror burst; the annular distributor 11 cooperates with the multiple nozzles 111 to spray nitrogen gas to the bottom of the first sight glass 4, and a dynamic gas film is formed by the arc-shaped ring cutting surface, thereby synchronously realizing corrosion medium isolation and fog elimination; the double-sight-glass redundant design provides an emergency observation window when the main sight glass fails, thereby significantly improving the safety of the device; the pressure self-adaptive sealing structure combines with the three-stage sealing gasket, thereby effectively blocking the penetration of strong corrosive medium. Therefore, the present application effectively overcomes the various shortcomings in the prior art and has a high industrial utilization value.

[0037] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. An explosion-proof and corrosion-resistant chemical sight glass device, comprising a base (1), a flange seat (2), and a flange cover plate (3) arranged in sequence from bottom to top, a first sight glass (4) being provided between the base (1) and the flange seat (2), and a second sight glass (5) being provided in the flange seat (2); Its characteristics are: A mirror seat (6) is provided in the flange seat (2), and a first sight mirror (4) is mounted on the mirror seat (6); an air bag (7) is provided on the outer side of the flange seat (2) near the lower end, and a discharge hole (21) is provided on the inner side of the flange seat (2) near the lower end, the lower end of the mirror seat (6) cooperates to block one end of the discharge hole (21), and the other end of the discharge hole (21) is connected to the air bag (7); A plurality of spring pins (10) are equidistantly provided on the inner upper end of the flange seat (2), and the mirror seat (6) is connected to the spring pins (10). The mirror seat (6) compresses the spring pins (10) according to pressure changes to adaptively adjust shielding and avoidance relative to the discharge hole (21).

2. The explosion-proof and corrosion-resistant chemical sight glass device according to claim 1, characterized in that: The mirror seat (6) comprises an upper mirror seat (61) and a lower mirror seat (62), the first mirror (4) is mounted between the upper mirror seat (61) and the lower mirror seat (62), a third sealing gasket (14) is provided between the lower end of the upper mirror seat (61) and the first mirror (4), and between the lower mirror seat (62) and the first mirror (4), and the upper mirror seat (61) and the lower mirror seat (62) are detachably connected by bolts.

3. The explosion-proof and corrosion-resistant chemical sight glass device according to claim 2, characterized in that: An annular distributor (11) is provided on the inner side of the lower mirror seat (62), and the input end of the annular distributor (11) is connected to the outside of the flange seat (2) through a pipeline; a plurality of nozzles (111) are connected to the annular distributor (11) at equal intervals, and the output end of the nozzle (111) corresponds to the bottom of the first sight glass (4).

4. The explosion-proof and corrosion-resistant chemical sight glass device according to claim 3, characterized in that: The lower end of the first viewing mirror (4) is provided with an arc-shaped concave annular section (41), and the nozzle (111) sprays air toward the annular section (41) to form an air film.

5. The explosion-proof and corrosion-resistant chemical sight glass device according to claim 1, characterized in that: The spring pin (10) is composed of a pin (101) and a spring (102), wherein the pin (101) is mounted on the upper end of the upper mirror seat (61), and the spring (102) is sleeved on the outside of the pin (101) and connected between the inner upper end of the flange seat (2) and the upper mirror seat (61).

6. The explosion-proof and corrosion-resistant chemical sight glass device according to claim 1, characterized in that: A drying box (15) is embedded on the inner wall of the flange seat (2) between the second sight glass (5) and the first sight glass (4).

7. The explosion-proof and corrosion-resistant chemical sight glass device according to claim 1, characterized in that: A first sealing gasket (12) is provided between the base (1) and the flange seat (2); a second sealing gasket (13) is provided between the upper end of the flange seat (2) and the lower end of the second sight glass (5), and between the flange cover (3) and the upper end of the second sight glass (5).

8. The explosion-proof and corrosion-resistant chemical sight glass device according to claim 1, characterized in that: The base (1) and the flange seat (2), as well as the flange seat (2) and the flange cover plate (3), are detachably connected by bolts.

9. The explosion-proof and corrosion-resistant chemical sight glass device according to claim 1, characterized in that: A support seat (8) is provided on one side of the flange cover (3), and a flip cover (9) is hingedly connected to the support seat (8) via a pin shaft. The flip cover (9) can be flipped and fitted on the outer side of the observation end.

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