CN216944475U - Inflatable isolation sealing device suitable for large-scale outer floating roof storage tank - Google Patents
Inflatable isolation sealing device suitable for large-scale outer floating roof storage tank Download PDFInfo
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- CN216944475U CN216944475U CN202122779738.0U CN202122779738U CN216944475U CN 216944475 U CN216944475 U CN 216944475U CN 202122779738 U CN202122779738 U CN 202122779738U CN 216944475 U CN216944475 U CN 216944475U
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Abstract
The utility model discloses an inflatable isolation sealing device suitable for a large-scale external floating roof storage tank, which comprises a primary sealing structure and a secondary sealing structure, wherein an inflatable isolation sealing structure is arranged in a sealing space formed between the primary sealing structure and the secondary sealing structure, the inflatable isolation sealing device comprises N air bags which are arranged along the circumferential direction of the inner wall of the storage tank at intervals, the air bags are cylindrical capsules, the air bags are provided with inflation ports, the inflation ports are provided with air nozzles, and two ends of the air bags in the length direction are respectively fixed with a section of pull rope. The secondary sealing arc plate is provided with N through holes, the air bag is positioned between the primary sealing pressing plate, the floating top outer edge plate and the secondary sealing arc plate, the air bag is fixed with the primary sealing pressing plate and the floating top outer edge plate through a fixing structure, and the air nozzles of the N air bags are led out from the through holes in the secondary sealing arc plate in a one-to-one correspondence mode. Through increase inflatable isolation seal structure in the middle of the primary and secondary seal, not only supplement the primary seal effect, but also effectively compress the seal space, reduce oil gas gathering.
Description
Technical Field
The utility model relates to a floating roof sealing structure, in particular to a sealing device for a floating roof of a large crude oil storage tank.
Background
At present, the sealing device of the external floating roof storage tank is generally provided with two seals, the primary seal adopts a three-core elastic foam sealing structure, the secondary seal adopts an air diaphragm sealing structure, during use, the primary seal three-core elastic foam seal needs to be immersed in a liquid storage, and a pressing plate of the secondary seal adopts a stainless steel structure to ensure the sealing effect. However, under the condition that the distance deviation of the annular space between the outer edge plate of the outer floating roof and the tank wall is large, the sealing effect of the sealing device is weakened, and oil and gas are gradually accumulated in the space formed between the primary seal and the secondary seal.
The primary and secondary sealing position of the floating roof storage tank is one of the parts which are easy to cause fire, the oil gas accumulated in the sealing space of the part is reduced to reach the combustion limit and the explosion limit, and the condition of eliminating sparks generated in the sealing space is an important measure for avoiding the lightning stroke fire of the oil tank. In the long-term operation of the outer floating roof storage tank, the primary sealing effect is poor due to the fact that the annular space between the outer edge plate of the outer floating roof and the tank wall has large distance deviation, oil gas volatilization is generated, oil gas is gathered in the space between primary sealing and secondary sealing, the oil gas concentration in the sealing space exceeds the standard, and therefore potential safety hazards are brought. Therefore, in the operation of the storage tank, how to reduce the sealed space and reduce the volatilization of oil gas to eliminate the potential safety hazard is an urgent technical problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
Aiming at the potential safety hazard of the outer floating roof storage tank in the prior art in long-term operation, the utility model provides an inflatable isolation sealing device suitable for a large-scale outer floating roof storage tank.
In order to solve the technical problem, the inflatable isolating and sealing device suitable for the large-scale outer floating roof storage tank comprises a primary sealing structure and a secondary sealing structure, wherein the inflatable isolating and sealing structure is arranged in a sealing space formed between the primary sealing structure and the secondary sealing structure, the inflatable isolating and sealing structure comprises N air bags arranged at intervals along the circumferential direction of the inner wall of the storage tank, the air bags are made of nitrile rubber, each air bag is provided with an inflating opening, each inflating opening is provided with an air nozzle, each air bag is in the shape of a cylindrical rubber bag, and two ends of each air bag in the length direction are respectively fixed with a section of pull rope.
Further, the utility model relates to an inflatable isolation sealing device suitable for a large-scale outer floating roof storage tank, wherein:
the primary seal structure comprises a primary seal pressing plate, the secondary seal structure comprises a secondary seal arc plate and a secondary seal oil-gas diaphragm, N through holes are formed in the secondary seal arc plate, the air bag is located between the primary seal pressing plate, the floating top outer edge plate and the secondary seal arc plate, the air bag is fixed through a fixing structure and the primary seal pressing plate is fixed with the floating top outer edge plate, and the N through holes in the secondary seal arc plate correspond to the air nozzles of the N air bags in a one-to-one mode and are led out.
The cross section of the air bag is circular, N is 24, and all the air bags are uniformly distributed around the whole floating roof outer edge plate.
The fixing structure is in threaded connection and comprises two bolts bonded on the air bag and through holes respectively formed in the primary sealing pressure plate and the floating top outer edge plate, and the bolts penetrate through the through holes and are screwed down by nuts, so that the air bag is fixed with the primary sealing pressure plate and the floating top outer edge plate.
The bolt, the floating roof and the tank body are in the same electric potential.
And a reinforced rubber plate is arranged between the air tap and the air bag.
And 2N small through holes are formed in the secondary sealing arc plate and used for leading out pull ropes at two ends of the air bag in the length direction.
Compared with the prior art, the utility model has the beneficial effects that:
the sealing device provided by the utility model is suitable for sealing the floating plate of a large-scale external floating roof storage tank of a crude oil storage base, and realizes inflatable sealing by additionally arranging the air bag between the primary and secondary sealing of the traditional floating plate sealing. On one hand, the volatilization of oil gas can be effectively reduced, and the unorganized emission can be reduced; on the other hand, the oil-gas space is reduced to the maximum extent, so that the operation safety of the storage tank is guaranteed.
Drawings
FIG. 1-1 is a schematic cross-sectional view of a storage tank fitted with a sealing device of the present invention;
FIG. 1-2 is a view taken along line A of FIG. 1-1;
FIG. 2-1 is a schematic view of the construction of the bladder in the sealing device of the present invention;
fig. 2-2 is a sectional view B-B in fig. 2-1.
In the figure: 1-static conducting pole, 2-secondary sealing structure, 21-secondary sealing arc plate, 22-secondary sealing oil-gas diaphragm, 4-inflatable isolation sealing structure, 41-air bag, 42-inflation inlet, 43-air nozzle, 44-reinforced rubber plate, 45-pull rope, 5-primary sealing structure, 51-primary sealing press plate, 6-tank inner wall, 7-floating top outer edge plate and 8-foam baffle.
Detailed Description
The utility model will be further described with reference to the following figures and specific examples, which are not intended to limit the utility model in any way.
As shown in fig. 1-1 and fig. 1-2, the inflatable isolation sealing device suitable for a large-scale external floating roof storage tank provided by the utility model comprises a primary sealing structure 5 and a secondary sealing structure 2, wherein the primary sealing structure 5 comprises a primary sealing pressing plate 51, the secondary sealing structure 2 comprises a secondary sealing arc plate 21 and a secondary sealing oil-gas diaphragm 22, and an inflatable isolation sealing structure 4 is arranged in a sealing space formed between the primary sealing structure 5 and the secondary sealing structure 2.
The inflatable isolation sealing structure 4 comprises N air bags 41 which are arranged along the circumferential direction of the inner wall 6 of the storage tank at intervals, the cross section of each air bag 41 is circular, and all the air bags 41 are uniformly distributed around the whole floating roof outer edge plate 7. The material of gasbag 41 is nitrile rubber, gasbag 41 is equipped with inflation inlet 42, inflation inlet 42 department is equipped with air cock 43 be equipped with a N through-hole on the secondary seal arc board 21, gasbag 41 is located primary seal clamp plate 51, float between the outer edge board 7 of top and the secondary seal arc board 21, gasbag 41 through fixed knot construct with primary seal clamp plate 51 is fixed with the outer edge board 7 of top of floating, fixed knot constructs and adopts threaded connection, and this fixed knot constructs including bonding two bolts on gasbag 41 with set up the through-hole on primary seal clamp plate and the outer edge board of top of floating respectively, the bolt passes behind the through-hole and screws up with the nut to realize gasbag 41 with the fixed of the outer edge board of primary seal clamp plate and top of floating, the bolt is in the equipotential with the top of floating and jar body. The air nozzles 43 of the N air bags 41 are led out from the N through holes on the secondary sealing arc plate 21 in a one-to-one correspondence manner. A reinforcing rubber plate 44 is arranged between the air tap 43 and the air bag 41, the air bag 41 is in the shape of a cylindrical rubber bag, two ends of the air bag 41 in the length direction are respectively fixed with a section of pull rope 45, and the secondary sealing arc plate 21 is provided with 2N small through holes for leading out the pull ropes 45 at the two ends of the air bag 41 in the length direction.
Example (b): the numerical units of the dimensions referred to in the present example are all mm.
As shown in fig. 1-1 and fig. 1-2, in this embodiment, a 10-ten-thousand cubic meter floating roof oil storage tank is taken as an example, the radius of the inner wall of the storage tank is 40000, the distance between the outer edge plate of the floating roof and the inner wall of the storage tank is 250, the distance between the bottom surface of the whole sealing device and the oil surface is 100, the liquid-free depth of the sealing device is 120, the height of the secondary sealing arc plate is 25, the height of the outer edge plate of the floating roof extending out of the floating roof plate is 110, the height of the outer edge plate of the floating roof is 800, the distance between the foam baffle plate and the inner wall of the storage tank is 1000, and the height of the foam baffle plate is 1150.
As shown in fig. 2-1 and 2-2, the inflatable isolation and sealing structure 4 in the present sealing device includes 24 air bags 41, as shown in fig. 2-1 and 2-2, each air bag 41 has a length of 10200 and a diameter of 350, the air bag 41 is made of nitrile rubber and has a thickness of 5, the inflation hole 42 has a diameter of 4, an air nozzle 43 is disposed at the inflation hole 42, a reinforced rubber plate 44 is adhered between the air nozzle 43 and the air bag 41, the reinforced rubber plate 44 is a nitrile rubber plate and has a thickness of 5 and a planar size of 600 × 600, and is symmetrically arranged with the inflation hole 42, i.e., the inflation hole 2 is located at the central position of the reinforced rubber plate 44. In the present embodiment, 24 air bags 41 are circumferentially arranged at intervals of 175 on the tank inner wall 6 of the tank and fixed together with the top of the primary seal pressing plate 51 and the side of the floating roof outer edge plate 7 by fixing structures, which are not exclusive of the above-described screw connection forms, and the specific fixing structure is not limited in the present invention as long as the air bags 41 can be fixed at the designed position.
The 24 air bags 41 surround the whole floating roof to form rubber seal, the maximum width of the seal is 350, all the air bags 41 are respectively fixed by a primary seal pressing plate 51 and a floating roof outer edge plate 7, the distance between every two adjacent fixed points is 5000, 24 air bags 41 made of nitrile rubber are continuously placed in a seal space formed between the primary seal structure 5 and the secondary seal structure 2 (namely the top of the primary seal pressing plate 51, the outer part of the floating roof outer edge plate 7 and the secondary seal arc plate 21), and an inflation inlet 42 of each air bag 41 is led out from 48 small holes formed in the secondary seal arc plate 21, so that periodic air supplement is facilitated.
The fixed point of the air bag 41 in the utility model enables the sealing device and the floating plate to be integrated, thus the sealing device can be driven to move along with the floating plate.
In summary, the inflatable isolation sealing device for the large-scale external floating roof storage tank of the utility model adds the inflatable isolation sealing structure between the traditional primary seal and the traditional secondary seal, and the cross section of the seal is circular and surrounds the storage tank for a circle. All the air bags forming the inflatable isolation sealing structure are fixed on the primary sealing pressure plate and the outer edge plate of the floating roof by bolts or other structural forms, and when the air bags are installed, the inflation ports of the air bags are led out through the secondary sealing arc plate, so that the air bags can be inflated periodically. If the fixing bolt is adopted, the bolt, the floating roof and the tank body are in the same electric potential, so that static electricity accumulation is avoided. The inflatable isolation sealing structure has large sealing elasticity, and even if the annular space between the outer edge plate of the floating roof and the inner wall of the tank has larger deviation, the gas elastic effect of the air bag can still play a sealing role, so that the primary sealing is supplemented, meanwhile, the solid sealing is increased, the space for gathering oil gas is compressed, a large amount of gas can not volatilize when the secondary sealing is opened, and the injury caused by toxic substances is avoided.
Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit of the present invention, for example, in order to enhance the sealing elasticity, the air bag of the present invention may have a double-layer structure, in which the outer air bag is made of rubber material to perform the sealing and fixing functions, and the inner air bag is an inflation chamber to perform the supporting function for the outer layer. All of which are within the scope of the present invention.
Claims (7)
1. The utility model provides a be applicable to large-scale outer floating roof storage tank inflatable keeps apart sealing device, includes primary seal structure (5), secondary seal structure (2) and leads static pole (1), its characterized in that primary seal structure (5) and secondary seal structure (2) between be equipped with inflatable isolation seal structure (4) in the confined space that forms, inflatable isolation seal structure (4) are including N gasbag (41) along storage tank inner wall (6) circumference interval arrangement, the material of gasbag (41) is butyl fine rubber, gasbag (41) are equipped with inflation inlet (42), inflation inlet (42) department is equipped with air cock (43), gasbag (41) are cylindricality capsule-shaped gasbag (41) length direction's both ends are equallyd divide and are do not be fixed with one section stay cord (45).
2. The inflatable isolating and sealing device suitable for the large-scale outer floating roof storage tank is characterized in that the primary sealing structure (5) comprises a primary sealing pressing plate (51), the secondary sealing structure (2) comprises a secondary sealing arc plate (21) and a secondary sealing oil-gas diaphragm (22), N through holes are formed in the secondary sealing arc plate (21), the air bags (41) are located among the primary sealing pressing plate (51), the floating roof outer edge plate (7) and the secondary sealing arc plate (21), the air bags (41) are fixed with the primary sealing pressing plate (51) and the floating roof outer edge plate (7) through fixing structures, and the air nozzles (43) of the N air bags (41) are led out from the N through holes in the secondary sealing arc plate (21) in a one-to-one correspondence mode.
3. The inflatable isolation sealing device for the large-scale external floating roof tank of claim 2, wherein the cross section of the air bags (41) is circular, N is 24, and all the air bags (41) are uniformly distributed around the whole floating roof outer edge plate.
4. The inflatable isolating and sealing device for the large-scale external floating roof tank according to claim 2, wherein the fixing structure is a threaded connection and comprises two bolts bonded to the air bag (41) and through holes respectively formed in the primary sealing pressure plate (51) and the floating roof outer edge plate (7), and the bolts are screwed by nuts after passing through the through holes, so as to fix the air bag (41) to the primary sealing pressure plate (51) and the floating roof outer edge plate (7).
5. The inflatable isolation seal apparatus for large external floating roof storage tank of claim 4, wherein the bolts are at the same potential as the floating roof and the tank body.
6. The inflatable isolation sealing device for large external floating roof tank of claim 1, wherein a reinforced rubber plate (44) is arranged between the air nozzle (43) and the air bag (41).
7. The inflatable isolation sealing device suitable for the large-scale external floating roof storage tank of claim 2, wherein the secondary sealing arc plate is provided with 2N small through holes for leading out the pulling ropes (45) at two ends of the air bag (41) in the length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122779738.0U CN216944475U (en) | 2021-11-12 | 2021-11-12 | Inflatable isolation sealing device suitable for large-scale outer floating roof storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122779738.0U CN216944475U (en) | 2021-11-12 | 2021-11-12 | Inflatable isolation sealing device suitable for large-scale outer floating roof storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216944475U true CN216944475U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122779738.0U Active CN216944475U (en) | 2021-11-12 | 2021-11-12 | Inflatable isolation sealing device suitable for large-scale outer floating roof storage tank |
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| Country | Link |
|---|---|
| CN (1) | CN216944475U (en) |
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2021
- 2021-11-12 CN CN202122779738.0U patent/CN216944475U/en active Active
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