CN210708861U

CN210708861U - Airtight primary sealing device for inner floating disc

Info

Publication number: CN210708861U
Application number: CN201921728537.4U
Authority: CN
Inventors: 吴栋华; 郑毅
Original assignee: Jiangsu Hengfeng Annex Polytron Technologies Inc
Current assignee: Jiangsu Hengfeng Annex Polytron Technologies Inc
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-06-09
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a sealing device of airtight type for interior floating plate belongs to sealing device technical field for solve the poor scheduling problem of current interior floating plate edge seal effect. The utility model discloses an oil tank body, this internal floating plate that is provided with of oil tank, the outer wall of interior floating plate is provided with annular edge plate, the upper end outer wall of edge plate is provided with the elastic plate, the downward arc bending in elastic plate upper end, the outer wall and the oil tank body inner wall in close contact with of elastic plate, form sealed chamber between elastic plate and the edge plate, the mounting hole has been seted up in the lateral wall of edge plate through running through, the mounting hole has all been set the stabilivolt, stretch into sealed intracavity after the lower extreme of stabilivolt runs through the mounting hole, the upper end of stabilivolt is located the top of interior floating plate, when sealed intracavity is the ordinary pressure, the lower extreme of stabilivolt is located below.

Description

Airtight primary sealing device for inner floating disc

Technical Field

The utility model relates to a sealing device technical field, concretely relates to interior floating plate is sealing device of airtight type for one time.

Background

With the rapid development of the petrochemical industry in China, great economic benefits are brought to the society, and meanwhile, a large amount of harmful waste gas is discharged, so that the environment is polluted, and serious harm is brought to the life and the body of people. Therefore, VOCs exhaust gas treatment is urgent. At present, the current situation of VOCs waste gas treatment in China has some defects, continuous development and progress are needed, and more thorough VOCs waste gas treatment is carried out by using more advanced and scientific treatment methods. VOCs are Volatile Organic Compounds (VOCs) and are a generic name for various organic compounds having a boiling point of 50 ℃ to 260 ℃ at normal temperature. Is an important component of light oil escaping into the air. The oil gas evaporation loss not only brings economic loss to enterprises, but also can generate potential safety hazard and can cause environmental pollution.

The inner floating plate is a floating top cover which floats on the liquid level of the oil tank and goes up and down along with the oil product. The method for covering the inner floating top cover on the liquid surface is the most ideal method for reducing oil evaporation loss, and the peripheral seals of the floating plate of the oil storage tank of most petrochemical enterprises in our country generally adopt bag-type packing primary seal, tongue-type secondary seal or mechanical shoe-type seal at present, but the edge seals of the traditional bag-type packing primary seal, tongue-type secondary seal and mechanical shoe-type seal are non-airtight seals, so that oil and gas cannot be effectively sealed in the space.

The Chinese patent application numbers are: CN201720151902.4 discloses a patent entitled "steel inner floating disc with large compensation elastic mechanical seal structure", which describes: a circle of large compensation elastic mechanical sealing structure is arranged on the circumference of the inner floating disc, and the sliding sealing between the inner floating disc and the inner wall of the storage tank is realized through the large compensation elastic mechanical sealing structure; the large compensation elastic mechanical sealing structure comprises a film supporting elastic plate, a sealing film, a spring plate, a packing layer and a sliding shoe plate which are sequentially arranged from bottom to top, wherein the film supporting elastic plate, the sealing film, the spring plate, the packing layer and the sliding shoe plate extend to the outer side of the circumference of the inner floating disc and are bent downwards to form the elastic mechanical sealing structure; the top ends of the membrane supporting elastic plate, the sealing membrane, the spring plate, the packing layer and the sliding plate are fixed on the outer ring beam through bolts, and the outer ring beam is fixed on the circumference of the inner floating disc.

However, a constant-pressure system is not arranged in the sealing cavity, once overpressure occurs, the friction force generated by the operation of the inner floating disc is increased to cause the floating disc chuck, and the inner floating disc is subjected to disc sinking accidents.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a sealing device is once used to interior floating plate airtight type to improve the gas tightness of interior floating plate lift in-process, guarantee the security of interior floating plate in the use.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

the utility model discloses a sealing device is once used to interior floating plate airtight type, including the oil tank body, this internal floating plate that is provided with of oil tank, the outer wall of interior floating plate is provided with the edge board, the shape of edge board and the mutual adaptation of inner wall of oil tank body, the upper end outer wall of edge board is provided with the elastic plate, the downward arc bending in elastic plate upper end, the outer wall and the oil tank body inner wall in close contact with of elastic plate, form sealed chamber between elastic plate and the edge board, the lateral wall of edge board runs through and has seted up a plurality of mounting holes, arbitrary mounting hole has all set the stabilivolt, the lower extreme of stabilivolt runs through the mounting hole and stretches into sealed intracavity, the upper end of stabilivolt is located the top of interior floating plate, when sealed intracavity is the ordinary pressure, the lower extreme.

Preferably, the upper end of the elastic plate is bent downwards in an arc shape, and the elastic plate is made of a steel plate.

Preferably, the lower end of the voltage-stabilizing tube is connected with a support frame, one end of the support frame is connected with the outer wall of the voltage-stabilizing tube, and the other end of the support frame is connected with the outer wall of the inner floating plate.

Preferably, the dead weight draught of the inner floating plate is 65-75mm, and the lower end of the pressure stabilizing tube is 20-35mm above the lower bottom of the inner floating plate.

Preferably, the lower end of the elastic plate is bent in a direction approaching the inner floating plate.

Preferably, follow supreme polytetrafluoroethylene sealing pad, elastic strip and the teflon hot melt seal membrane of having set gradually down between elastic plate and the edge board, the elastic plate upper end is provided with the clamp plate, elastic plate, teflon hot melt seal membrane, elastic strip, polytetrafluoroethylene sealing pad and edge board are fixed through bolt assembly.

Preferably, the upper end of the pressure stabilizing tube is connected with a connecting ring, the connecting ring is connected with a connecting plate, and the connecting plate is connected with the pressure plate.

Preferably, the detection hole that communicates each other with sealed chamber is seted up to the marginal board lateral wall, and the detection hole outer wall sets and has equipped the blind plate.

Preferably, the side wall of the edge plate is detachably connected with an air tightness detection device, the air tightness detection device comprises a pressure guiding pipe, a pressurizing device and a pressure display device, one end of the pressure guiding pipe is communicated with the detection hole, and the other end of the pressure guiding pipe is communicated with the pressurizing device and the pressure display device.

The beneficial effects of the utility model are embodied in:

1. the utility model discloses a special one-level seal structure is formed through the combination of elastic plate and edge plate, makes the edge seal compensation range expand to-100 mm/+300mm, and seal structure all contacts with the oil tank body under any operating mode, can guarantee constantly that it closely laminates with the tank wall under the situation of any irregular tank wall (if out of round or protruding inflation), the utility model discloses a one-level seal is liquid mosaic seal structure, and interior floating plate can dip below the liquid level of liquid medium to can let closely contact between interior floating plate bottom and the liquid medium liquid level, can not form the oil gas space, showing the volatilization loss that has reduced the liquid medium that stores in the oil storage tank; under normal working conditions, the immersion depth of the elastic plate can be ensured to be more than or equal to 350mm, so that the elastic plate is tightly attached to the inner wall of the oil tank body under the multiple actions of the elasticity of the elastic plate, the gas pressure in the static sealing space and the pressure of medium liquid, and the sealing and the inner wall of the oil tank body are ensured to approach to a zero gap; no oil gas leakage exists, the domestic and foreign environmental protection emission standard is met, and the energy saving and consumption reducing effects are obvious; the material of the sealing system has conductivity, and all accessories of the floating plate are connected with the floating plate in an equipotential manner, so that the intrinsic safety of the floating roof tank sealing system is realized; and through the effect of the pressure stabilizing tube, the pressure in the sealing cavity is ensured not to be overlarge, and the problems of an inner floating disc chuck and an inner floating disc caused by that the overpressure in the sealing cavity increases the running friction force of the inner floating disc in the lifting process of the floating disc are solved.

2. The lower end of the pressure stabilizing tube is provided with the supporting frame, the lower end of the pressure stabilizing tube is supported and fixed, random shaking cannot occur in the process of following the lifting and moving of the inner floating plate, and the stability of a liquid sealing surface during liquid sealing is guaranteed.

3. The draft of floating plate in the concrete design to and the lower extreme of stabilivolt and the relation of interior floating plate lower extreme distance, its purpose is in order to realize the constant voltage in the sealed intracavity. The main working principle of the constant pressure maintaining system is as follows: the self weight of the inner floating plate enables the inner floating plate to have certain liquid-feeding depth when in use, the weight of the inner floating plate is designed by combining the buoyancy received by the inner floating plate, the liquid-feeding depth of the inner floating plate is 65-75mm, the lower end of the pressure stabilizing tube is positioned above the lower end of the inner floating disc, and the distance between the pressure stabilizing tube and the inner floating disc is 20-35mm, namely, the lower opening of the pressure stabilizing tube is immersed in the liquid by 45-50mm under the normal working condition, a liquid seal is formed in the pressure stabilizing tube, when liquid components become light or materials carry a large amount of gas, the pressure in the sealing cavity is increased along with the liquid components, so that the liquid level of the liquid seal is reduced, when the pressure stabilizing tube falls to a certain degree, the lower opening of the pressure stabilizing tube can be exposed out of the liquid level, the space in the sealed cavity is communicated with the outside, the air pressure can be released from the pressure stabilizing tube, when the pressure in the sealing cavity is reduced to a certain degree, the liquid seal liquid level rises to seal the pipe orifice at the lower end of the pressure stabilizing pipe again, and the constant pressure effect in the sealing cavity is achieved when certain balance is achieved.

4. The lower extreme of elastic plate is buckled to the direction that is close to interior floating plate, guarantees the in-process that interior floating plate lift moved, even meet oil tank body inner wall arch, also can carry out smooth transition through the kink outer wall of buckling.

5. By arranging the sealing gasket, the sealing performance of the joint of the elastic plate and the edge plate is ensured, and oil gas leakage is effectively avoided; through setting up the clamp plate, play the anticollision effect to the elastic plate, play the effect that compresses tightly downwards to the elastic plate simultaneously.

6. The sealing device is also provided with an air tightness detection device, so that the sealing effect of the sealing device can be conveniently detected; the air tightness detection device is detachable, and is convenient to detach and install; the detection method comprises the following steps: firstly, detaching a blind plate arranged on the side wall of an edge plate, replacing the blind plate with a flange with an air inlet and an air outlet, then communicating one end of a pressure guiding pipe with a detection hole through the flange, taking a pressurizing device as a preferred alternative, namely an inflator, starting the pressurizing device through the inflator, then observing the number of a pressure gauge, and continuously observing for 30 minutes when the attribute of the pressure gauge is displayed as 350kpa or 350mm water column, wherein the pressure value has no change, namely the sealing effect passes the test; it needs to be further explained that: after the whole installation of the inner floating disc is finished, carrying out air tightness detection during water supply test operation; or when the tank is cleaned and maintained, the air tightness of the primary seal is detected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a partial front view of a sealing device at a stabilivolt according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 3 is a schematic partial structural view of a detection device according to another embodiment of the present invention;

FIG. 4 is an enlarged view of the structure at B in FIG. 3;

fig. 5 is a schematic top view of the elastic plate and the inner floating plate of the present invention.

In the attached drawing, 1-an oil tank body, 2-an inner floating disc, 3-an edge plate, 310-a detection hole, 320-a blind plate, 4-an elastic plate, 410-a sealing cavity, 5-a pressure stabilizing pipe, 610-a polytetrafluoroethylene sealing gasket, 620-a Teflon hot melting sealing film, 630-an elastic strip, 7-a pressing plate, 8-a bolt assembly, 9-an air tightness detection device, 910-a pressure guiding pipe, 920-a pressure display device, 930-a pressure device, 10-a connecting ring, 11-a connecting plate and 12-a supporting frame.

Detailed Description

Embodiments of the present invention will be described in detail with reference to fig. 1 to 5. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

Example 1

The utility model discloses a sealing device is once spent to interior floating plate airtight type, including oil tank body 1, this internal floating plate 2 that is provided with of oil tank, the outer wall of interior floating plate 2 is provided with annular edge board 3, the upper end outer wall of edge board 3 is provided with

elastic plate

4, 4 downward arc bending in upper end of elastic plate, the outer wall and the 1 inner wall in close contact with of oil tank body of elastic plate 4, form sealed chamber 410 between elastic plate 4 and the edge board 3, the lateral wall of edge board 3 runs through and has seted up a plurality of mounting holes, arbitrary mounting hole has all set stabilivolt 5, stabilivolt 5's lower extreme runs through and stretches into in sealed chamber 410 behind the mounting hole, stabilivolt 5's upper end is located the top of interior floating plate 2, when sealed chamber 410 is the ordinary pressure, stabilivolt 5's lower extreme is located below the liquid level.

After the technical scheme is adopted: the utility model discloses a special one-level seal structure is formed in the combination of elastic plate 4 and edge plate 3, makes the edge seal compensation range expand to-100 mm/+300mm, and seal structure all contacts with oil tank body 1 under any operating mode, can guarantee constantly that it closely laminates with the tank wall under the situation of any irregular tank wall (if out of round or protruding inflation), the utility model discloses a one-level seal is liquid mosaic seal structure, and interior floating plate 2 can dip below the liquid level of liquid medium to can let closely contact between interior floating plate 2 bottom and the liquid medium liquid level, can not form the oil gas space, showing the volatilization loss that has reduced the liquid medium that stores in the oil storage tank; under normal working conditions, the immersion depth of the elastic plate 4 can be ensured to be more than or equal to 350mm, so that the elastic plate 4 is tightly attached to the inner wall of the oil tank body 1 under the multiple actions of the elasticity of the elastic plate, the gas pressure in the static sealing space and the pressure of medium liquid, and the sealing and the inner wall of the oil tank body 1 are ensured to approach to zero gaps; and through the effect of stabilivolt 5, guarantee that the pressure in sealed chamber 410 can not too big, avoided the floating plate in the lift in-process, the internal pressure of sealed chamber 410 increases the internal floating plate 2 chuck that the frictional force of internal floating plate 2 operation brought, the problem that the internal floating plate 2 takes place the sinking.

Example 2

The present embodiment is further optimized on the basis of embodiment 1 as follows: the lower extreme of stabilivolt 5 is connected with support frame 12, and the one end and the 5 outer walls interconnect of stabilivolt of support frame 12, the other end and the outer wall interconnect of interior floating plate 2 of support frame 12.

After the technical scheme is adopted: the lower end of the pressure stabilizing tube 5 is provided with the support frame 12 which plays a role in supporting and fixing the lower end of the pressure stabilizing tube 5, so that random shaking can not occur in the process of following the lifting and moving of the inner floating plate 2, and the stability of a liquid seal surface during liquid seal is ensured.

Example 3

The present embodiment is further optimized on the basis of embodiment 1 as follows: the dead weight draught of the inner floating plate 2 is 65-75mm, such as 65mm, 68mm, 70mm, 73mm, 75mm and the like, and the lower end of the pressure stabilizing tube 5 is 20-35mm, such as 20mm, 23mm, 25mm, 28mm, 30mm, 33mm, 35mm and the like, above the lower bottom of the inner floating plate 2.

After the technical scheme is adopted: the draft of the inner floating plate 2 and the distance relationship between the lower end of the pressure stabilizing tube 5 and the lower end of the inner floating plate 2 are designed specifically, and the purpose is to realize constant pressure in the sealing cavity 410. The main working principle of the constant pressure maintaining system is as follows: the dead weight of the inner floating disc 2 enables the inner floating disc 2 to have certain liquid feeding depth when in use, the weight of the inner floating disc 2 is designed by combining the buoyancy received by the inner floating disc 2, the liquid feeding depth of the inner floating disc 2 is 65-75mm, the lower end of the pressure stabilizing tube 5 is positioned above the lower end of the inner floating disc 2, and the distance between the lower end and the lower end is 20-35mm, namely, the lower opening of the pressure stabilizing tube 5 is immersed in liquid by 45-50mm under normal working conditions, a liquid seal is formed in the pressure stabilizing tube 5, when the liquid components become light or materials carry a large amount of gas, the pressure in the sealing cavity 410 is increased along with the lower opening of the liquid seal, the liquid level of the liquid seal is reduced, when the liquid level is reduced to a certain degree, the lower opening of the pressure stabilizing tube 5 is exposed out of the liquid level, the space in the sealing cavity 410 is communicated with the outside, the air pressure is relieved from the pressure stabilizing tube 5, when the sealing cavity 410 is reduced to a certain degree, when a certain equilibrium is reached, a constant pressure is exerted in the sealed chamber 410.

Example 4

The present embodiment is further optimized on the basis of embodiment 1 as follows: the lower end of the elastic plate 4 is bent toward the inner floating plate 2.

After the technical scheme is adopted: the lower extreme of elastic plate 4 is buckled to the direction that is close to interior floating plate 2, guarantees the in-process that interior floating plate 2 goes up and down to move, even meet 1 inner wall arch of oil tank body, also can carry out smooth transition through the kink outer wall of buckling.

Example 5

The present embodiment is further optimized on the basis of embodiment 1 as follows: a polytetrafluoroethylene sealing gasket 610, an elastic strip 630 and a Teflon hot-melt sealing film 620 are sequentially arranged between the elastic plate 4 and the edge plate 3 from bottom to top, a pressing plate 7 is arranged at the upper end of the elastic plate 4, and the pressing plate 7, the elastic plate 4, the Teflon hot-melt sealing film 620, the elastic strip 630, the polytetrafluoroethylene sealing gasket 610 and the edge plate 3 are fixed through a bolt assembly 8; the teflon hot-melt sealing film 620 is immersed above 250mm below the liquid level, and the elastic strip 630 is also immersed above 250mm below the liquid level. The upper end of the voltage stabilizing tube 5 is connected with a connecting ring 10, the connecting ring 10 is connected with a connecting plate 11, and the connecting plate 11 is connected with the pressure plate 7.

After the technical scheme is adopted: by arranging the sealing gasket 6, the sealing performance of the joint of the elastic plate 4 and the edge plate 3 is ensured, and oil gas leakage is effectively avoided; through setting up clamp plate 7, play the crashproof effect that obtains to elastic plate 4, play the effect that compresses tightly downwards simultaneously to elastic plate 4.

Example 6

The present embodiment is further optimized on the basis of embodiment 1 as follows:

the side wall of the edge plate 3 is provided with a detection hole 310 communicated with the sealing cavity 410, and the outer wall of the detection hole 310 is provided with a blind plate 320. The side wall of the edge plate 3 is detachably connected with an air tightness detection device 9, the air tightness detection device 9 comprises a pressure guiding pipe 910, a pressurizing device 930 and a pressure display device 920, one end of the pressure guiding pipe 910 is communicated with the detection hole 310, and the other end of the pressure guiding pipe 910 is communicated with the pressurizing device 930 and the pressure display device 920.

After the technical scheme is adopted: the sealing device is also provided with an air tightness detection device 9, so that the sealing effect of the sealing device can be conveniently detected; the air tightness detection device 9 is detachable, and is convenient to detach and install; the detection method comprises the following steps: firstly, the blind plate 320 arranged on the side wall of the edge plate 3 is detached and replaced by a flange with an air inlet and an air outlet, then one end of the pressure guiding pipe 910 is communicated with the detection hole 310 through the flange, the pressurizing device 930 is preferably an inflator and is started up through the inflator, then the reading number of the pressure gauge is observed, when the attribute of the pressure gauge is displayed as 350kpa or 350mm water column, the pressure value is continuously observed for 30 minutes without any change, namely the sealing effect is tested; it needs to be further explained that: after the integral installation of the inner floating disc 2 is finished, air tightness detection is carried out during water supply test operation; or when the tank is cleaned and maintained, the air tightness of the primary seal is detected.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides a primary sealing device of airtight type for interior floating plate, includes oil tank body (1), be provided with interior floating plate (2) in oil tank body (1), its characterized in that: the outer wall of interior floating plate (2) is provided with edge plate (3), the upper end outer wall of edge plate (3) is connected with elastic plate (4), and the outer wall and the inner wall in close contact with of oil tank body (1) of elastic plate (4), form sealed chamber (410) between elastic plate (4) and edge plate (3), the lateral wall of edge plate (3) runs through and has seted up the mounting hole, and the mounting hole sets stabilivolt (5), stretch into sealed chamber (410) behind the lower extreme through mounting hole of stabilivolt (5), the upper end of stabilivolt (5) is located the top of interior floating plate (2), and when being the ordinary pressure in sealed chamber (410), the lower extreme of stabilivolt (5) is located below the liquid level.

2. The airtight type primary seal device for an internal floating disc according to claim 1, wherein: the upper end of the elastic plate (4) is bent downwards in an arc shape, and the elastic plate (4) is made of a high-elasticity stainless steel plate.

3. The airtight type primary seal device for an internal floating disc according to claim 1, wherein: the lower end of the voltage-stabilizing tube (5) is connected with a support frame (12), one end of the support frame (12) is connected with the outer wall of the voltage-stabilizing tube (5), and the other end of the support frame (12) is connected with the outer wall of the inner floating disc (2).

4. The airtight type primary seal device for an internal floating disc according to claim 1, wherein: the self-weight draught of the inner floating plate (2) is 65-75mm, and the lower end of the pressure stabilizing tube (5) is 20-35mm above the lower bottom of the inner floating plate (2).

5. The airtight type primary seal device for an internal floating disc according to claim 1, wherein: the lower end of the elastic plate (4) is bent towards the direction close to the inner floating disc (2).

6. The airtight type primary seal device for an internal floating disc according to claim 1, wherein: follow supreme polytetrafluoroethylene sealing pad (610), elastic strip (630) and the special fluorine dragon hot melt seal membrane (620) of having set gradually down between elastic plate (4) and edge board (3), elastic plate (4) upper end is provided with clamp plate (7), elastic plate (4), special fluorine dragon hot melt seal membrane (620), elastic strip (630), polytetrafluoroethylene sealing pad (610) and edge board (3) are fixed through bolt assembly (8).

7. The airtight type primary seal device for an internal floating disc according to claim 6, wherein: the upper end of the voltage stabilizing tube (5) is connected with a connecting ring (10), the connecting ring (10) is connected with a connecting plate (11), and the connecting plate (11) is connected with the pressing plate (7).

8. The airtight type primary seal device for an internal floating disc according to claim 1, wherein: the side wall of the edge plate (3) is provided with a detection hole (310) communicated with the sealing cavity (410), and the outer wall of the detection hole (310) is provided with a blind plate (320).

9. The airtight type primary seal device for an internal floating disc according to claim 8, wherein: the side wall of the edge plate (3) is detachably connected with an air tightness detection device (9), the air tightness detection device (9) comprises a pressure guiding pipe (910), a pressurization device (930) and a pressure display device (920), one end of the pressure guiding pipe (910) is communicated with the detection hole (310), and the other end of the pressure guiding pipe (910) is communicated with the pressurization device (930) and the pressure display device (920).