Self-reset type negative pressure dust removal explosion venting opening

Abstract

The utility model relates to a self-reset type negative pressure dedusting explosion venting port which structurally comprises an explosion venting pipe, a supporting plate, a flexible explosion venting film and a cover body, a port of the explosion venting pipe inclines upwards, the supporting plate is arranged in an inclined mode, a center hole is formed in the middle of the supporting plate, the center hole is connected with the port of the explosion venting pipe in a sealed mode, and the flexible explosion venting film is arranged in the cover body. The flexible explosion venting film is attached to the upper surface of the supporting plate, the outline of the flexible explosion venting film is larger than that of the center hole and completely covers the center hole, the upper portion of the flexible explosion venting film is fixed to the supporting plate, and the cover body completely covers the end of the explosion venting pipe, the supporting plate and the explosion venting film. And at least one opening is formed in the cover body. The explosion venting opening has lower explosion venting pressure, is suitable for a negative pressure dust removal system with low requirement on the explosion venting pressure, cannot damage the explosion venting film in the explosion venting process, can automatically reset, does not need to be maintained, and is low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to a negative pressure explosion vent, in particular to a self-resetting negative pressure dust removal explosion vent. Background Art

[0002] If there are no special requirements, general dust removal systems are negative pressure systems, that is, the dust collector and the dust removal pipeline before it are in a negative pressure state when working. When the dust removal pipeline transports explosive gas or dust, in order to prevent the gas or dust in the dust removal system from exploding and damaging the dust removal system, it is usually necessary to set explosion vents on these dust removal pipelines or equipment. The function of the explosion vent is to release the high-pressure gas generated by the explosion from the explosion vent when the system explodes, so as to protect the pipeline system equipment. It can be seen that for a specific system that needs to be explosion-proof, it is crucial to protect the pipeline system if the explosion vent has a suitable explosion vent pressure.

[0003] At present, there are generally two types of explosion vents:

[0004] The first type is the metal explosion-proof membrane. The explosion-proof membrane is generally made of metal thin plates, among which thin aluminum plates are more commonly used. The metal thin plates are clamped by clamps on all sides to completely seal the explosion-proof channel. A temporary cover plate is set at the port of the explosion-proof port. When an explosion occurs, the pressure will burst the metal thin plate to release high-pressure gas. The disadvantage of this solution is that the explosion-proof pressure is high, generally 0.1Mpa, and a new bursting membrane needs to be replaced after the explosion.

[0005] The second type is a resettable metal cover explosion vent. The movable metal plate is set at the top of the vertical explosion vent channel, relying on gravity to cover the explosion vent. The movable metal plate is hinged at the port, and an opening limiter is provided above the movable metal plate to limit the opening angle of the movable metal plate, which is convenient for resetting the movable metal plate. When the system pressure reaches a certain pressure, the movable metal plate opens; when the pressure is lower than the explosion venting pressure, the valve cover is reset under the action of the limiter and gravity. The resettable metal valve cover explosion vent also has the disadvantage of high explosion venting pressure, which is generally 0.1MPa.

[0006] The function of the explosion vent is to prevent the system from exploding or the pressure rising which may cause damage to the system equipment. Since the working pressure of the dust removal system is relatively low and the equipment is all low-pressure equipment, if the explosion vent pressure is too high, it cannot protect the system equipment. Utility Model Content

[0007] The utility model aims to provide a self-resetting negative pressure dust removal explosion vent to solve the problem of excessively high explosion vent pressure in existing explosion vent devices.

[0008] The utility model is implemented as follows: a self-resetting negative pressure dust removal explosion vent, comprising an explosion vent pipe, a support plate, a flexible explosion vent membrane and a cover body, the port of the explosion vent pipe is tilted upward, the support plate is tilted, a center hole is opened in the middle of the support plate, the center hole is sealed and connected to the port of the explosion vent pipe, the flexible explosion vent membrane is placed on the upper surface of the support plate, the contour of the flexible explosion vent membrane is larger than the contour of the center hole and completely covers the center hole, the upper part of the flexible explosion vent membrane is fixed on the support plate, the cover body completely covers the end of the explosion vent pipe, the support plate and the explosion vent membrane, and at least one open opening is opened on the cover body.

[0009] As a further improvement of the self-resetting negative pressure dust removal and explosion vent of the utility model, the material of the flexible explosion vent membrane is vulcanized rubber.

[0010] As a further improvement of the self-resetting negative pressure dust removal and explosion vent of the utility model, reinforcing ribs and a metal mesh are arranged in the central hole, and the reinforcing ribs and the metal mesh are flush with or lower than the upper surface of the support plate.

[0011] As a further improvement of the self-resetting negative pressure dust removal and explosion vent of the utility model, a pressure strip is provided on the upper edge of the flexible explosion venting membrane, the flexible explosion venting membrane is located between the pressure strip and the support plate, and the pressure strip is fixed to the support plate by bolts.

[0012] As a further improvement of the self-resetting negative pressure dust removal and explosion vent of the utility model, the angle between the support plate and the vertical plane is greater than 10°.

[0013] As a further improvement of the self-resetting negative pressure dust removal and explosion vent of the utility model, the cover body is a square shell, and an open opening is provided on the side or bottom surface of the cover body.

[0014] As a further improvement of the self-resetting negative pressure dust removal and explosion vent of the utility model, the cover body is connected to the outer wall of the explosion vent pipe by an angle steel.

[0015] The utility model uses a flexible explosion-proof membrane, which has a certain elasticity and is fixed on the support plate. When the pressure of the explosion-proof pipe is greater than a certain value, the flexible explosion-proof membrane is pushed upward and outward to release the pressure. When the pressure of the explosion-proof pipe is less than a certain value, the flexible explosion-proof membrane automatically resets under the action of elastic recovery force and gravity, and covers the port of the explosion-proof pipe again, and reseals the port of the explosion-proof pipe. Moreover, the explosion-proof port is pressed tighter and tighter under the action of the negative pressure of the system, which strengthens the sealing effect.

[0016] Flexible explosion-proof membranes are generally made of vulcanized rubber, which has good elasticity and can make the explosion-proof port have a lower explosion-proof pressure (less than 1kPa). They are suitable for negative pressure dust removal systems with low requirements for explosion-proof pressure. During the explosion-proof process, the explosion-proof membrane will not be damaged, can be automatically reset, does not require maintenance, and has a low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model.

[0018] Figure 2 It is a schematic diagram of the utility model during explosion relief.

[0019] Figure 3 yes Figure 1 AA view.

[0020] Figure 4 yes Figure 2 BB direction view.

[0021] Figure 5 It is a connection structure diagram of the flexible explosion-proof membrane and the supporting plate of the utility model.

[0022] In the figure: 1. explosion-proof pipe; 2. support plate; 3. flexible explosion-proof membrane; 4. cover body; 5. center hole; 6. pressure strip; 7. bolt; 8. reinforcing rib; 9. metal mesh; 10. angle steel; 4-1. open mouth. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.

[0024] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the utility model is a self-resetting negative pressure dust removal explosion vent 1, and its structure mainly includes an explosion vent pipe, a support plate 2, a flexible explosion vent membrane 3 and a cover body 4.

[0025] The port of the explosion-proof pipe is tilted upward, the support plate 2 is tilted and has the same tilt angle as the port of the explosion-proof pipe. A center hole 5 is opened in the middle of the support plate 2. The center hole 5 is sealed and connected to the port of the explosion-proof pipe. The port of the explosion-proof pipe is flush with or lower than the upper surface of the support plate 2.

[0026] The flexible explosion-proof membrane 3 is placed on the upper surface of the support plate 2, and the upper part of the flexible explosion-proof membrane 3 is fixed on the support plate 2. The outline of the flexible explosion-proof membrane 3 is larger than the outline of the center hole 5 and completely covers the center hole 5. Under the action of gravity, the flexible explosion-proof membrane 3 is sealed against the upper surface of the support plate 2, thereby sealing the port of the explosion-proof pipe.

[0027] Specifically, the support plate 2 may be rectangular, and the flexible explosion-proof membrane 3 may also be rectangular.

[0028] The utility model further includes a cover body 4, which completely covers the end of the explosion relief pipe, the support plate 2 and the explosion relief membrane, and at least one opening 4-1 is provided on the cover body 4. The cover body 4 is used to protect the explosion relief opening 1 to prevent external water, debris, etc. from approaching the explosion relief opening 1, and the opening 4-1 can quickly and directionally release the high-pressure gas discharged during the explosion relief to the set allowed discharge area.

[0029] In the present invention, the flexible explosion-venting membrane 3 is made of vulcanized rubber, which has excellent elastic deformation ability, and has appropriate hardness and self-weight, and is easy to ensure the fit between the surface of the flexible explosion-venting membrane 3 and the support plate 2 when in use. When subjected to a certain external force, the flexible explosion-venting membrane 3 made of vulcanized rubber will swing around the fixed point, thereby opening the port of the explosion-venting pipe to release high-pressure gas. When the pressure of the explosion-venting pipe drops, the flexible explosion-venting membrane 3 made of vulcanized rubber can quickly reset and ensure the sealing of the port of the explosion-venting pipe.

[0030] Reinforcement ribs 8 and metal mesh 9 are arranged in the center hole 5, and the reinforcement ribs 8 and the metal mesh 9 are flush with or lower than the upper surface of the support plate 2. The metal mesh 9 is supported by the reinforcement ribs 8 to prevent deformation of the metal mesh 9 during the explosion relief process, so as to ensure that the metal mesh 9 does not protrude from the surface of the support plate 2 and affect the fit between the flexible explosion relief membrane 3 and the surface of the support plate 2. The metal mesh 9 can prevent external debris from entering the negative pressure dust removal system. At the same time, the structure of the reinforcement ribs and the metal mesh can also make the vulcanized rubber explosion relief membrane always in a flat state under the negative pressure and self-weight of the pipe network, so as to better ensure the sealing effect.

[0031] like Figure 4 , Figure 5 As shown, a pressure strip 6 is provided on the upper edge of the flexible explosion-proof membrane 3 , the flexible explosion-proof membrane 3 is located between the pressure strip 6 and the support plate 2 , and the pressure strip 6 is fixed to the support plate 2 by bolts 7 .

[0032] Bolt holes 7 are opened on the upper part of the support plate 2, and nuts are welded and fixed on the lower surface of the upper part of the support plate 2, and the nuts correspond to the bolt holes 7. When installing and replacing the flexible explosion-proof membrane 3, the bolt holes 7 on the upper edge of the flexible explosion-proof membrane 3 are matched with the bolt holes 7 on the support plate 2, the pressing plate is pressed on the flexible explosion-proof membrane 3, and the bolt holes 7 of the pressing plate are matched with the bolt holes 7 on the flexible explosion-proof membrane 3, the bolts 7 are passed through the bolt holes 7, and the bolts 7 are screwed and fixed on the nuts.

[0033] The explosion venting pipe may be in a vertical state, a horizontal state, or an inclined state, but the opening angle of the explosion venting pipe port should be limited, that is, the angle between the support plate 2 and the vertical plane.

[0034] Preferably, the angle between the support plate 2 and the vertical plane is greater than 10°. When the angle between the support plate 2 and the vertical plane is too small, in a natural state, the flexible explosion-proof membrane 3 is close to a vertical state. At this time, it is difficult to ensure the fit between the flexible explosion-proof membrane 3 and the surface of the support plate 2 only by its own elasticity. When the support plate 2 has a certain angle with the vertical plane, the flexible explosion-proof membrane 3 is in an inclined state in a natural state. In addition to its own elasticity, its own weight will also cause the flexible explosion-proof membrane 3 to be attached to the surface of the support plate 2 to ensure sealing.

[0035] The cover body 4 is specifically a square shell, and an opening 4 - 1 is provided on the side or bottom surface of the cover body 4 , but an opening 4 - 1 should not be provided on the top surface of the cover body 4 .

[0036] The cover body 4 is connected to the outer wall of the explosion relief pipe through an angle steel 10 .

[0037] After using the utility model, when the pressure of the explosion relief pipe is greater than the explosion relief pressure, the high-pressure gas pushes the flexible explosion relief membrane 3 open to release the pressure. When the pressure of the explosion relief pipe is less than the explosion relief pressure, the flexible explosion relief membrane 3 automatically resets under the action of elastic recovery force, gravity and negative pressure of the pipe network, covers the port of the explosion relief pipe again, and reseals the port of the explosion relief pipe. The utility model has a smaller explosion relief pressure and is suitable for negative pressure dust removal systems with low requirements for explosion relief pressure. In the explosion relief process, the explosion relief membrane will not be damaged, can be automatically reset, does not require maintenance, and has low production cost.

Claims

1. A self-resetting negative pressure dust removal and explosion vent, characterized in that: It includes an explosion-proof tube, a support plate, a flexible explosion-proof membrane and a cover body, the port of the explosion-proof tube is tilted upward, the support plate is tilted, a center hole is opened in the middle of the support plate, the center hole is sealed and connected to the port of the explosion-proof tube, the flexible explosion-proof membrane is placed on the upper surface of the support plate, the outline of the flexible explosion-proof membrane is larger than the outline of the center hole and completely covers the center hole, the upper part of the flexible explosion-proof membrane is fixed on the support plate, the cover body completely covers the end of the explosion-proof tube, the support plate and the explosion-proof membrane, and at least one opening is opened on the cover body.

2. The self-resetting negative pressure dust removal and explosion vent according to claim 1 is characterized in that: The flexible explosion-proof membrane is made of vulcanized rubber.

3. The self-resetting negative pressure dust removal and explosion vent according to claim 1 is characterized in that: Reinforcement ribs and a metal mesh are arranged in the central hole, and the reinforcement ribs and the metal mesh are flush with or lower than the upper surface of the support plate.

4. The self-resetting negative pressure dust removal and explosion vent according to claim 1 is characterized in that: A pressure strip is arranged on the upper edge of the flexible explosion-proof membrane, the flexible explosion-proof membrane is located between the pressure strip and the support plate, and the pressure strip is fixed to the support plate by bolts.

5. The self-resetting negative pressure dust removal and explosion vent according to claim 1 is characterized in that: The included angle between the support plate and the vertical plane is greater than 10°.

6. The self-resetting negative pressure dust removal and explosion vent according to claim 1 is characterized in that: The cover body is a square shell, and an opening is provided on the side surface or the bottom surface of the cover body.

7. The self-resetting negative pressure dust removal and explosion vent according to claim 1 is characterized in that: The cover body is connected to the outer wall of the explosion relief pipe through angle steel.

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