Negative pressure sight glass protection device and negative pressure system

Abstract

The utility model relates to the technical field of sight glass protection devices, in particular to a negative pressure sight glass protection device and a negative pressure system.The negative pressure sight glass protection device comprises a sealing cover, an outer edge, an inner edge, a pressing ring and a sight glass, the pressing ring is installed on the upper side of the sight glass, the middle of the pressing ring is vertically through, the middle of the sight glass is exposed for observation, the sealing cover is sleeved outside the pressing ring, and the outer edge is integrally arranged on the lower side of the outer end of the sealing cover. An inner edge is integrally arranged in the lower side of the sealing cover, and a boss is arranged in the middle of the pressing ring and located between the outer edge and the inner edge. The sight glass cover is reasonable and compact in structure and convenient to use, the sealing cover is arranged on the outer side of the pressing ring, the sealing cover can be acted on the outer surface of the sight glass cover by atmospheric pressure when the sight glass is broken, a negative pressure system is isolated, air is prevented from entering the negative pressure system to cause fire and explosion, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mirror protection devices, in particular to a negative pressure mirror protection device and a negative pressure system. Background Art

[0002] The sight glass of the negative pressure system of the production equipment of the refining enterprise is used to observe the operating status of the materials in the vacuum system. Generally, various high-temperature resistant, low-temperature resistant or pressure-resistant glasses are used. There is a risk of breakage in glass materials. If the sight glass of the negative pressure system in operation breaks, it will have a great impact on the overall operation of the refining production equipment. First, it affects the normal operation of the equipment, causing emergency shutdown of the equipment and unplanned discharge of materials; secondly, most of the media in the negative pressure system of the refining equipment are flammable, explosive and high-temperature. A large amount of air enters the vacuum system, and the system pressure increases, reaching the flash point and explosion limit of the material, causing the negative pressure system to explode, which may cause the explosion of the entire device and even the factory area. Regular inspection and replacement of sight glasses can reduce the risk of rupture of the negative pressure system sight glass, but the risk of rupture of the sight glass cannot be eliminated. Summary of the invention

[0003] The utility model provides a negative pressure mirror protection device and a negative pressure system, which overcome the deficiencies of the above-mentioned prior art and can effectively solve the problem that a large amount of air enters the vacuum system due to the rupture of the existing negative pressure system, and the system pressure rises to the flash point and explosion limit of the material, posing a safety hazard.

[0004] One of the technical solutions of the utility model is achieved through the following measures: a negative pressure mirror protection device, including a sealing cover, an outer edge, an inner edge, a pressure ring, and a mirror, a pressure ring is installed on the upper side of the mirror, the middle part of the pressure ring is passed through from top to bottom, the middle part of the mirror is exposed and can be observed, a sealing cover is sleeved on the outer side of the pressure ring, an outer edge is integrally provided on the lower side of the outer end of the sealing cover, an inner edge is integrally provided inside the lower side of the sealing cover, a boss is provided in the middle of the pressure ring, and the boss is located between the outer edge and the inner edge.

[0005] The following are further optimizations and / or improvements to the above utility model technical solution:

[0006] Preferably, a sealing gasket is further included, and a sealing gasket is provided between the outer edge and the inner edge.

[0007] Preferably, a sealing ring is provided between the inner edge and the boss.

[0008] Preferably, a handle is installed on the upper side of the sealing cover.

[0009] The second technical solution of the utility model is achieved through the following measures: a negative pressure system, including a negative pressure sight glass protection device, a vacuum system, a sight glass barrel, and a flange. The vacuum system is connected to the sight glass barrel, a flange is installed at the end of the sight glass barrel, and the sight glass is installed on the sight glass barrel through a pressure ring and a flange.

[0010] The utility model has a reasonable and compact structure and is easy to use. By arranging a sealing cover on the outside of the pressure ring, the sealing cover can be acted on the outer surface of the mirror cover by atmospheric pressure when the mirror is broken, thereby isolating the negative pressure system, preventing air from entering the negative pressure system to cause fire and explosion, and reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attached Figure 1 It is a schematic diagram of the front cross-sectional structure of an embodiment of the utility model.

[0012] Attached Figure 2 It is a structural schematic diagram of the utility model when in use.

[0013] The codes in the accompanying drawings are: 1 is a sealing cover, 2 is an outer edge, 3 is an inner edge, 4 is a pressure ring, 5 is a sight glass, 6 is a boss, 7 is a sealing gasket, 8 is a sealing ring, 9 is a handle, 10 is a vacuum system, 11 is a sight glass tube, and 12 is a flange. DETAILED DESCRIPTION

[0014] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0015] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0016] The present invention is further described below in conjunction with the embodiments and drawings:

[0017] Embodiment 1: As attached Figure 1-2 As shown, the negative pressure mirror protection device includes a sealing cover 1, an outer edge 2, an inner edge 3, a pressure ring 4, and a mirror 5. A pressure ring 4 is installed on the upper side of the mirror 5. The middle part of the pressure ring 4 is passed through from top to bottom, and the middle part of the mirror 5 is exposed for observation. The sealing cover 1 is mounted on the outer side of the pressure ring 4. The outer edge 2 is integrally provided on the lower side of the outer end of the sealing cover 1, and the inner edge 3 is integrally provided inside the lower side of the sealing cover 1. A boss 6 is provided in the middle of the pressure ring 4, and the boss 6 is located between the outer edge 2 and the inner edge 3.

[0018] The utility model device is used for -0.1kPa, 240℃ polystyrene devolatilizer. According to the actual shape of the devolatilizer sight glass 5, a protective cover for the devolatilizer sight glass 5 is made. When the sight glass 5 is used normally, the sealing cover 1 is lifted upward to disengage it from the pressure ring 4, and the running status of the material inside the container can be observed normally through the sight glass 5. When the sight glass 5 of the negative pressure system is broken, the sealing cover 1 can automatically isolate the negative pressure system to prevent air from entering, and the atmospheric pressure acts on the outside of the cover. When the inside is fully vacuumed, a lot of force is required to remove the sealing cover 1. Generally, the operator cannot remove the cover. Therefore, the operator can judge the breakage of the sight glass 5 by the force of lifting the sealing cover 1, and can make timely treatment. The utility model can prevent air from entering the negative pressure system to cause fire and explosion, and achieve intrinsic safety. The sealing cover 1 weighs three to five kilograms. When the utility model is set, the diameter of the polystyrene devolatilizer sight glass 5 cover is 150mm, and the sealing cover 1 weighs 3kg when the sight glass 5 works normally. The operator can easily open the sight glass 5 cover with 30N when checking the material running status; when the sight glass 5 is broken, the atmospheric pressure acts on the outer surface of the sight glass 5 cover. When the operator checks the material running status, it takes 1860N to lift the sight glass 5 protective cover, that is, the operator cannot lift the sight glass 5 protective cover. The failure of the sight glass 5 cover to lift indicates that the sight glass 5 is broken.

[0019] The negative pressure mirror protection device can be further optimized and / or improved according to actual needs:

[0020] Embodiment 2: As attached Figure 1-2 As shown, it also includes a sealing gasket 7, and a sealing gasket 7 is arranged between the outer edge 2 and the inner edge 3. The sealing gasket 7 is arranged to enhance the sealing effect between the sealing cover 1 and the boss 6 of the pressure ring 4.

[0021] Embodiment 3: As attached Figure 1-2 As shown, a sealing ring 8 is provided between the inner edge 3 and the boss 6. The sealing ring 8 can enhance the sealing effect between the boss 6 of the pressure ring 4 and the inner edge 3, perform multiple sealing, and further reduce the risk of air ingress.

[0022] Embodiment 4: As attached Figure 1-2 As shown, a handle 9 is installed on the upper side of the sealing cover 1. The handle 9 is provided to facilitate operators to take the sealing cover 1.

[0023] Embodiment 5: As attached Figure 1-2As shown, the negative pressure system includes a negative pressure mirror protection device, a vacuum system 10, a mirror barrel 11, and a flange 12. The vacuum system 10 is connected to the mirror barrel 11, and the flange 12 is installed at the end of the mirror barrel 11. The mirror 5 is installed on the mirror barrel 11 through a pressure ring and the flange 12. There is a risk of rupture of the mirror 5 in the negative pressure system, and the entry of air after rupture will pose a great safety hazard. The installation of the negative pressure mirror protection device can block the mirror barrel 11 after the mirror 5 is ruptured to prevent air from entering, which can greatly reduce the safety hazard caused by the entry of air when the mirror 5 is ruptured.

[0024] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A negative pressure mirror protection device, characterized in that It includes a sealing cover, an outer edge, an inner edge, a pressure ring, and a sight glass. A pressure ring is installed on the upper side of the sight glass. The middle part of the pressure ring passes through from top to bottom. The middle part of the sight glass is exposed for observation. A sealing cover is mounted on the outer side of the pressure ring. The outer edge is integrally provided on the lower side of the outer end of the sealing cover. The inner edge is integrally provided inside the lower side of the sealing cover. A boss is provided in the middle of the pressure ring, and the boss is located between the outer edge and the inner edge.

2. The negative pressure mirror protection device according to claim 1, characterized in that It also includes a sealing gasket, which is arranged between the outer edge and the inner edge.

3. The negative pressure mirror protection device according to claim 1 or 2, characterized in that A sealing ring is arranged between the inner edge and the boss.

4. The negative pressure mirror protection device according to claim 1 or 2, characterized in that A handle is arranged on the upper side of the sealing cover.

5. The negative pressure mirror protection device according to claim 3, characterized in that A handle is arranged on the upper side of the sealing cover.

6. A negative pressure system using the negative pressure mirror protection device according to any one of claims 1 to 5, characterized in that The utility model comprises a negative pressure sight glass protection device, a vacuum system, a sight glass tube and a flange. The vacuum system is connected with the sight glass tube, a flange is installed at the end of the sight glass tube, and the sight glass is installed on the sight glass tube through a pressure ring and the flange.

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