CN114524199A - Floating roof tank sealing structure of labyrinth sealing belt and assembly process thereof - Google Patents
Floating roof tank sealing structure of labyrinth sealing belt and assembly process thereof Download PDFInfo
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- CN114524199A CN114524199A CN202011321445.1A CN202011321445A CN114524199A CN 114524199 A CN114524199 A CN 114524199A CN 202011321445 A CN202011321445 A CN 202011321445A CN 114524199 A CN114524199 A CN 114524199A
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- 238000007789 sealing Methods 0.000 title claims abstract description 167
- 238000007667 floating Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 12
- 244000126211 Hericium coralloides Species 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000007790 scraping Methods 0.000 claims 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 30
- 239000007789 gas Substances 0.000 description 15
- 229910052757 nitrogen Inorganic materials 0.000 description 12
- 238000005187 foaming Methods 0.000 description 9
- 239000003921 oil Substances 0.000 description 9
- 239000002390 adhesive tape Substances 0.000 description 6
- 229910001873 dinitrogen Inorganic materials 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 239000012945 sealing adhesive Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000005182 tip of the tongue Anatomy 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
- B65D88/42—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention relates to a floating roof tank sealing structure of a labyrinth sealing belt and an assembly process thereof, belonging to the technical field of labyrinth sealing of compressors. It includes: labyrinth seal body, labyrinth seal body radial one side be provided with at least one labyrinth recess and relative opposite side is provided with the broach sealing member, and labyrinth seal body is provided with the passageway that at least one intercommunication was provided with the both sides of labyrinth recess and broach sealing member. The air inlet end and the air outlet end of the compressor are communicated through the channel, so that the pressure of the air inlet end and the air outlet end of the compressor is balanced, and the shaft end sealing design and the model selection of the air inlet end and the air outlet end are consistent.
Description
Technical Field
The invention relates to the technical field of labyrinth seals of compressors, in particular to a labyrinth seal of a compressor, a labyrinth seal device of the compressor and the compressor.
Background
In a compressor unit, because the pressure difference between the front end and the rear end of a cylinder body is often large, in order to facilitate the design and the model selection of shaft end sealing (generally, a dry gas sealing structure), the pressure at the two ends of the cylinder body needs to be considered to be balanced and equal. Meanwhile, the sealing of the process gas with pressure in the cylinder body needs to be considered at the end face, so that the process gas is prevented from leaking to the outside.
Today, conventional sealing arrangements commonly take the form of a double seal; the primary sealing means is the direct cover of the oil surface. The commonly used primary sealing mainly comprises three forms of filling type elastic soft sealing, liquid filling type soft sealing and mechanical sealing. In order to guarantee better sealing effect, secondary sealing is arranged outside the primary sealing to form protection of the primary sealing and further reduce oil gas loss.
However, in practical application, it is found that due to the reasons that the tank body is settled and deformed, or the primary seal itself is aged and damaged, and the residual oil on the wall of the tank is continuously volatilized, oil gas accumulation is often generated in the space between the primary seal and the secondary seal of the storage tank, and part of the concentration even exceeds the lower explosion limit of the oil gas, at this moment, ignition sources such as thunder, static electricity and open fire can be encountered, and the explosion accident of the sealing ring can be caused. Sealing ring burning explosion accidents caused by lightning strike occur at home and abroad, and the safe operation of an external floating roof oil tank is seriously threatened.
In the past, two adjacent separate labyrinth seals are used for constructing the balance air chamber, and the overall width of the labyrinth seals is usually made smaller as much as possible under the condition of ensuring the assembly surface, so that the length of the rotor set is prevented from being increased, but the clamping and the processing of the labyrinth seals are inconvenient.
Disclosure of Invention
The purpose of the invention is realized by the following steps:
the utility model provides a floating roof jar seal structure based on tongue shape sealing strip, includes the jar wall, the floating disc, pressure-bearing strip and scraper blade, the one end of annular structure's pressure-bearing strip is fixed in the floating disc top, make the other end be fixed in on the scraper blade after the face bending of pressure-bearing strip, and annular structure's scraper blade closely slides and laminates on the jar wall, primary seal area and secondary seal area enclose in the annular space between jar wall and floating disc and close and constitute primary seal space and secondary seal space, the primary seal space intussuseption is filled with the filler, and secondary seal space is located the top of primary seal space, be provided with spacing hook and tongue shape area in this secondary seal space, the top of spacing hook is fixed in the top of floating disc, and spacing hook is gone down along the outer wall of floating disc, the level is outwards extended, the major end of tongue shape area is fixed in the top of floating disc, the tip of tongue shape area laminates the inner wall of secondary seal area, And the secondary sealing tape is pressed on the tank wall.
The invention relates to a floating roof tank sealing structure based on a tongue-shaped sealing strip, wherein the tongue-shaped sealing strip forms an annular structure; or the tongue-shaped belt is provided with a plurality of strips.
A compressor labyrinth seal device comprises the compressor labyrinth seal, a casing and a rotor set, wherein the casing is matched with at least one labyrinth groove, and the rotor set is matched with a comb tooth seal.
Further, the casing is matched with two labyrinth grooves, and the channel is communicated with the opening of the labyrinth sealing piece and is positioned between the two labyrinth grooves.
Further, the rotor set axial length is substantially equal to the distance between both ends of the comb seal in the axial direction of the labyrinth seal body.
A combined floating roof tank sealing device comprises a floating roof main body, wherein a nitrogen bag is arranged on the lower end face of the floating roof main body, the floating roof main body is of a round cake-shaped structure, a primary sealing mechanism is arranged on the side face of the floating roof main body and comprises a plurality of layers of clamping plates, an annular air bag is sleeved between the adjacent clamping plates and communicated with the nitrogen bag through a pressure dividing pipeline mechanism, a plurality of protrusions arranged along the circumferential direction are arranged on the outer side wall of the annular air bag, the outer edges of the protrusions exceed the outer edges of the clamping plates, and after gas in the nitrogen bag is pressed into the annular air bag, the protrusions are tightly pressed against the inner wall of the floating roof tank so as to form a closed space for the floating roof tank below the floating roof main body; the upper portion edge of floating roof main part is provided with the mounting panel that is used for installing secondary seal mechanism, the outside edge of mounting panel is provided with the sealed scraper blade that the polylith dock mutually, and every sealed scraper blade is provided with the reservoir with floating roof tank inner wall one side face of contact on the level, and the reservoir setting is at the upper segment of sealed scraper blade, and the cross section of reservoir is V-arrangement structure, is provided with a plurality of grooves along the horizontal setting of reservoir in the inboard bottom of every reservoir, sealed scraper blade both sides are provided with arc portion, and the arc portion of two adjacent sealed scraper blades docks to form the reservoir and float the exhaust passage of roof tank top space intercommunication, sealed scraper blade passes through the fixed arm and is connected with the mounting panel, is provided with in sealed scraper blade's top and prevents electrostatic mechanism.
Further improve this scheme, prevent that static mechanism includes guide bar, gyro wheel, sliding sleeve and pressure spring, the one end of guide bar is fixed on the mounting panel, and the other end of guide bar is provided with the anticreep piece that is used for preventing the sliding sleeve and breaks away from, and the gyro wheel is installed in the outer end of guide bar, wears to be equipped with the pressure spring on the guide bar, the one end and the sliding sleeve contact of pressure spring, the other end of sliding sleeve seal to with gyro wheel base fixed connection, the inner wall rolling contact of gyro wheel and floating roof jar.
As another preferred scheme of the invention, the sealing assembly comprises a frame with one side connected with the spring compensation mechanism, and the other side of the frame is sequentially provided with a first sealing rubber strip group, a foaming sponge and a second sealing rubber strip group from bottom to top; the surface of the foaming sponge is provided with a sealing adhesive tape; one end of the waterproof adhesive tape is arranged on the upper surface of the frame, and the other end of the waterproof adhesive tape is arranged on the upper surface of the floating roof.
On the basis of the floating roof primary sealing mechanism, a secondary sealing mechanism is further arranged, wherein the primary sealing mechanism is improved into a sealing mode of an elastic air bag from the original mechanical seal, the problems that the mechanical seal is not high in tightness and the like are solved, and the detailed analysis is as follows: be provided with the nitrogen gas package in floating top main part below, because the nitrogen gas package top receives the decurrent pressure effect of floating top simultaneously, the below receives the upwards buoyancy effect of natural pond liquid, gas in the nitrogen gas package is pushed inside the annular gasbag of both sides through the pipeline, the annular gasbag expands and takes place slight deformation, form confined space with the protruding top of annular in the outside tightly on floating top jar inner wall, the floating top main part is in firm fixed state this moment, the floating top below is close to complete seal state, under the unchangeable circumstances of liquid level, can not take place to float from top to bottom along with the liquid level, after the liquid level decline in the floating top jar, nitrogen gas package buoyancy reduces, the lateral wall expands under the nitrogen gas package under self gravity, gas in the gasbag gets into in the nitrogen gas package, the arch and the floating top jar separation of annular gasbag side, the floating top descends thereupon. According to the invention, three seals are formed by the first sealing rubber strip group, the foaming sponge and the second sealing rubber strip group, so that the sealing effect is further improved, and the foaming sponge is arranged between the first sealing rubber strip group and the second sealing rubber strip group, so that the sealing assembly is more attached to the inner wall of the storage tank due to the expansion deformation characteristic of the foaming sponge, and crude oil is prevented from volatilizing from a gap between the sealing assembly and the inner wall of the storage tank.
In addition, the sealing adhesive tape is arranged on the outer surface of the foaming sponge, so that the foaming sponge can be prevented from being corroded by crude oil, and the service life is prolonged.
In order to solve the second problem, the invention adopts the following technical scheme: a method for installing a super-amphiphobic surface composite sealing device for a floating roof storage tank comprises the following steps:
(1) firstly, fixing an inner supporting plate at the edge of a floating disc, then fixedly connecting a lower fixing plate with the inner supporting plate, fixing one side of a spring on the inner supporting plate, and connecting the other side of the spring with an outer supporting plate;
(2) the method comprises the following steps of putting a primary sealing sponge into a plastic film for vacuumizing, compressing the primary sealing sponge to a gap between the tank wall and the edge of a floating plate, wrapping a rubber wrapping belt with a super-amphiphobic coating outside the compressed primary sealing sponge, extruding an outer supporting plate and a spring, and putting the rubber wrapping belt and the primary sealing sponge between the outer supporting plate and the tank wall;
(3) fixedly connecting the upper fixing plate with the inner supporting plate;
(4) tearing off the plastic film outside the primary sealing sponge, and releasing the elasticity of the primary sealing sponge; under the combined action of the spring and the primary sealing sponge, the rubber wrapping tape is tightly attached to the wall of the tank to form primary sealing.
The air inlet end and the air outlet end of the compressor provided by the invention have the same shaft end sealing design and type selection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a labyrinth seal for a compressor according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a labyrinth seal of a labyrinth sealing device of a compressor according to an embodiment of the present invention.
Icon: 100-channels; 101-case bulge; 102-a labyrinth seal body; 103-a housing; 104-rotor set, 105-labyrinth groove; 106-first comb seal; 107-second comb seal.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A composite sealing device with a super-double-hydrophobic surface for a floating roof storage tank and an installation method thereof are disclosed, and as shown in figure 1, the composite sealing device with the super-double-hydrophobic surface for the floating roof storage tank comprises a bearing plate, a diaphragm, a labyrinth groove, secondary sealing sponge, an upper fixing plate, a bolt, a gasket, a nut, a spring, a rubber wrapping belt, primary sealing sponge, an outer supporting plate, a lower fixing plate and an inner supporting plate. The primary seal comprises an upper fixing plate, a spring, a rubber belting, a primary seal sponge, an outer supporting plate, a lower fixing plate and an inner supporting plate. Each group of one-time sealing adopts three springs to increase the reliability, and a group of springs is arranged every other one to two meters along the circumferential direction of the storage tank. Under the common elastic force action of the primary sealing sponge and the spring, the primary sealing device is tightly attached to the wall of the tank; when the gap between the edge of the floating disc and the wall of the tank is reduced, the primary sealing sponge is squeezed and compressed, and is tightly attached to the wall of the tank under the action of the elastic force of the spring; when the gap between the edge of the floating disc and the wall of the tank is enlarged, the extrusion force applied to the primary sealing sponge is reduced and expanded, and the primary sealing sponge is supported by the spring and is attached to the wall of the tank at any time; the primary sealing sponge is wrapped by a rubber wrapping tape with a super-amphiphobic coating on the surface.
The secondary seal comprises a bearing plate, a diaphragm, a labyrinth groove, secondary seal sponge, a bolt, a gasket and a nut, and the secondary seal adopts a labyrinth seal structure. FIG. 2 is a schematic view of the flow of leaked oil and gas within the labyrinth seal. In the throttle gear space 17, the oil gas that reveals contracts with higher speed, and the velocity of flow increases, and when getting into expansion cavity 18, the circulation passageway enlarges, and gaseous emergence diffusion in expansion cavity causes the swirl, makes the kinetic energy of gas convert heat energy, reduces gaseous residual velocity, through continuous energy loss, leaks the volume along with reducing, also contracts simultaneously and reduces secondary seal oil gas space.
It should be noted that the labyrinth seal body 102 is provided with one cylindrical passage 100 as a preferred embodiment, and in other embodiments, the number of passages 100 may be two or more, and when the number of passages 100 is two or more, the passages 100 may communicate with each other, and only one end of one passage 100 needs to communicate with the labyrinth groove 105. Meanwhile, the passage 100 is not limited to a cylinder, and may have other shapes, even an amorphous structure, the passage 100 may be not a straight line and may be disposed on the labyrinth seal body 102, and the axial line of the passage 100 may be a straight line or not.
One end of the labyrinth seal body 102, which is away from the labyrinth groove 105 in the radial direction, is provided with comb tooth seals, and the two sets of comb tooth seals are a first comb tooth seal 106 and a second comb tooth seal 107, which are respectively arranged on two sides of the opening of the labyrinth seal body 102 in the passage 100. The number of comb teeth of the first comb-tooth seal 106 is 3, and the number of comb teeth of the second comb-tooth seal 107 is 6.
It should be noted that the spring compensation mechanism 5 comprises a bracket 6 arranged above the floating roof 2, a pressurizing connecting rod 4 is hinged on the bracket 6, one end of the pressurizing connecting rod 4 is connected with the sealing component 3, and the other end of the pressurizing connecting rod 4 is connected with a return spring 9; the elastic force of the return spring 9 enables the pressurizing connecting rod 4 to always press the sealing component 3 towards the outer side direction of the floating roof 2.
A flange is arranged on the side surface of the floating roof 2, and the return spring 9 is transversely arranged on the flange; a fixed pulley 8 is arranged above the floating roof 2, and a traction wire 7 which passes through the fixed pulley 8 and is connected with the upper end of the pressurizing connecting rod 4 is arranged at the end part of the return spring 9. When the sealing assembly 3 is abraded or the floating roof 2 moves up and down the surface of the inner wall of the storage tank 1 to generate fluctuation, the reset spring 9 pulls the traction wire 7 all the time backwards, and the traction wire 7 pulls the pressurizing connecting rod 4 to rotate through the fixed pulley 8, so that the sealing assembly 3 is pressed to be attached to the inner wall of the storage tank 1, and the sealing performance is ensured.
As another preferable scheme of the present invention, the sealing assembly 3 includes a frame 15 having one side connected to the spring compensation mechanism 5, and the other side of the frame 15 is sequentially provided with a first sealing rubber strip group 12, a foaming sponge 14, and a second sealing rubber strip group 17 from bottom to top; the surface of the foaming sponge 14 is provided with a sealing adhesive plaster 16; one end of the waterproof adhesive tape 20 is arranged on the upper surface of the frame 15, and the other end of the waterproof adhesive tape 20 is arranged on the upper surface of the floating roof 2.
The upper end of the frame 15 is provided with a rubber section 19, the lower end of the rubber section 19 fixes the waterproof adhesive tape 20 on the frame 15, and the side of the rubber section 19 is provided with a sealing edge. When the sealing assembly is used, the sealing edge is tightly attached to the inner wall of the storage tank 1, and the sealing assembly 3 is prevented from being corroded by rainwater.
A pressure spring 18 is arranged between the second sealing rubber strip group 17 and the frame 15. The pressure spring 18 can pressurize the second sealant strip group 17, so as to ensure the sealing between the second sealant strip group 17 and the inner wall of the storage tank 1, and the wear compensation capability of the second sealant strip group 17 can be realized through the pressure spring 18.
The first sealing rubber strip group 12 and the second sealing rubber strip group 17 are formed by at least three sealing single rubber strips 13 which are vertically arranged; the single sealing rubber strips 13 between two adjacent sealing assemblies 3 are arranged in a staggered lap joint matching mode. The sealing performance between the sealing components 3 can be ensured, and the volatilization of crude oil from the gap between the two sealing components 3 is avoided.
As a third preferred aspect of the present invention, a connecting adhesive tape 21 is disposed between the bottom of the frame 15 and the side surface of the floating roof 2.
The present embodiment also provides a compressor including the compressor labyrinth seal arrangement of any one of the above.
The implementation principle of the embodiment is as follows: the air outlet end and the air inlet end of the compressor are respectively provided with a compressor labyrinth sealing device, and the channels 100 in the two compressor labyrinth sealing devices are communicated with each other, so that the air pressures at the two ends of the two compressor labyrinth sealing devices are consistent, and the shaft end sealing with the same type selection or design at the two ends of the two compressor labyrinth sealing devices is realized.
In summary, the following steps:
the compressor labyrinth sealing element provided by the invention adopts a single labyrinth sealing element provided with at least one channel to replace the original two labyrinth sealing elements, and the length of the labyrinth sealing element is increased, so that the clamping and the processing forming are facilitated.
The embodiment of the invention provides a combined floating roof tank sealing device, which comprises a floating roof main body 1, wherein a nitrogen bag 2 is arranged on the lower end surface of the floating roof main body 1, the floating roof main body 1 is of a round cake-shaped structure, a primary sealing mechanism is arranged on the side surface of the floating roof main body 1 and comprises a plurality of layers of clamping plates 3, an annular air bag 4 is sleeved between the adjacent clamping plates 3, the annular air bag 4 is communicated with the nitrogen bag 2 through a partial pressure pipeline mechanism 5, and a plurality of supporting tables are uniformly distributed on the inner side of the lower side wall of the nitrogen bag 2. After the liquid level descends, the gas in the annular air bag 4 is facilitated to enter the nitrogen bag 2, and on the other hand, the nitrogen bag 2 can be prevented from being excessively deformed after being extruded, so that the pressure bearing capacity of the nitrogen bag is improved, and the service life of the nitrogen bag is prolonged. The outer side wall of the annular air bag 4 is provided with a plurality of protrusions 4-1 arranged along the circumferential direction, the outer edges of the protrusions 4-1 exceed the outer edge of the clamping plate 3, and after the gas in the nitrogen bag 2 is pressed into the annular air bag 4, the protrusions 4-1 are tightly pressed against the inner wall of the floating roof tank 6 so as to form a closed space for the floating roof tank 6 below the floating roof main body 1; the upper portion edge of floating roof main part 1 is provided with secondary sealing mechanism, and secondary sealing mechanism includes mounting panel 7, the outside edge of mounting panel 7 is provided with the sealed scraper blade 8 that the polylith dock mutually, and every sealed scraper blade 8 is provided with reservoir 8-1 with the one side face that floats roof tank 6 inner wall and contact, reservoir 8-1 sets up the upper segment at sealed scraper blade 8, reservoir 8-1 is provided with more than two, and mutual parallel arrangement between reservoir 8-1. The annular air bags 4 are provided with more than two, the partial pressure pipeline mechanism 5 comprises horizontal pipelines and vertical pipelines, all the annular air bags 4 are communicated with each other through the horizontal pipelines, all the horizontal pipelines of the annular air bags 4 are communicated with each other through a plurality of vertical pipelines, and the lower end inlets of the vertical pipelines are communicated with the inside of the nitrogen bag 2. According to the invention, the floating roof is provided with the two-stage sealing mechanism, and the secondary sealing mechanism is further arranged on the basis of the primary sealing mechanism, wherein the primary sealing mechanism is improved from the original mechanical seal to the sealing mode of the elastic air bag, so that the problems of low sealing performance of the mechanical seal and the like are solved.
The assembly process of the floating roof tank sealing structure based on the tongue-shaped sealing strip comprises the following process steps:
step 1, forming a sealed space at one time;
step 1.1, bending the ring surface of the primary sealing belt with an annular structure into a U-shaped groove, and then plugging the U-shaped groove into an annular space between a tank wall and a floating disc;
step 1.2, inserting a limiting plate into a U-shaped groove of the primary sealing belt, and pressing a groove wall on one side of the primary sealing belt on the floating disc by the limiting plate;
step 1.3, after sponge is filled into the U-shaped groove of the primary sealing strip, the top parts of the groove walls on the two sides of the U-shaped groove of the primary sealing strip are fixed on the top part of the floating disc;
step 2, secondary sealing space forming;
2.1, bending the ring surface of the secondary sealing belt with an annular structure into a U-shaped groove, and then plugging the U-shaped groove into an annular space between the tank wall and the floating disc;
2.2, inserting a limiting hook into a U-shaped groove of the secondary sealing strip, pressing the inner side groove wall of the secondary sealing strip and one side groove wall of the primary sealing strip onto the floating disc together, and extruding the U-shaped groove of the primary sealing strip by the limiting hook of the L-shaped structure to form a primary sealing space for containing the sponge filler in the step 1.3;
step 2.3, fixing the large end of the tongue-shaped belt at the top of the floating disc, and then pressing the outer side groove wall of the secondary sealing belt on the inner wall of the tank wall by the small end of the tongue-shaped belt, so that the secondary sealing belt forms a secondary sealing space under the support of the tongue-shaped belt, and simultaneously the top of the outer side groove wall of the secondary sealing belt is laid on the upper surface of the tongue-shaped belt;
2.4, connecting the top of the outer side groove wall of the secondary sealing belt to the scraper after the scraper is slidably attached to the wall of the tank;
and 2.5, connecting the inner wall of a bearing belt of an annular structure to the top of the floating disc, and connecting the outer wall of the bearing belt to the scraper.
Claims (7)
1. A sealing structure of a floating roof tank of a labyrinth sealing belt is characterized by comprising: the labyrinth seal comprises a labyrinth seal body, wherein one side of the labyrinth seal body in the radial direction is provided with at least one labyrinth groove, the other opposite side of the labyrinth seal body is provided with a comb tooth seal, and the labyrinth seal body is provided with at least one channel communicated with the two sides of the labyrinth groove and the comb tooth seal; each primary sealing group adopts three springs to increase reliability, a group of springs is arranged every other one to two meters along the circumferential direction of the storage tank, and the primary sealing device is tightly attached to the wall of the storage tank under the common elastic force action of the primary sealing sponge and the springs; when the gap between the edge of the floating disc and the wall of the tank is reduced, the primary sealing sponge is squeezed and compressed, and is tightly attached to the wall of the tank under the action of the elastic force of the spring; when the gap between the edge of the floating plate and the wall of the tank is enlarged, the extrusion force applied to the primary sealing sponge is reduced and expanded, and the primary sealing sponge is supported by the spring and is attached to the wall of the tank at any time.
2. The floating roof tank sealing structure of labyrinth sealing belt as claimed in claim 1, wherein one side of the outer support plate is attached with rubber belt, the primary sealing sponge is positioned by the upper fixing plate and the lower fixing plate, and the primary sealing device is installed in the gap between the edges of the floating plate.
3. The floating roof tank sealing structure of labyrinth sealing tape according to claim 1, wherein said labyrinth groove is one in number, and said passage communicates with said labyrinth groove.
4. The sealing structure of floating top tank of labyrinth sealing belt according to claim 3, characterized in that the radial clearance (19a) or the radial interference (19b) of the brush tows with the rotor is less than 0.2 mm.
5. The floating roof tank sealing structure of labyrinth sealing band according to claim 3, characterized in that the brush seal strip (6) is fixed axially in the brush seal groove (7) of the labyrinth seal (8) with fastening bolts (17).
6. The floating roof tank seal structure of labyrinth sealing tape according to claim 5, characterized in that said channel is cylindrical.
7. The assembly process of the floating roof tank sealing structure based on the tongue-shaped sealing belt is characterized in that: the process comprises the following steps:
step 1, forming a sealed space at one time;
step 1.1, bending the ring surface of a primary sealing belt (5) with an annular structure into a U-shaped groove, and then plugging the U-shaped groove into an annular space between a tank wall (1) and a floating disc (2);
step 1.2, inserting a limiting plate into a U-shaped groove of the primary sealing belt (5), and pressing the groove wall on one side of the primary sealing belt (5) on the floating disc (2) by the limiting plate;
step 1.3, after sponge is filled into the U-shaped groove of the primary sealing belt (5), the top parts of the groove walls on the two sides of the U-shaped groove of the primary sealing belt (5) are fixed on the top part of the floating disc (2);
step 2, secondary sealing space forming;
2.1, bending the ring surface of the secondary sealing belt (6) with an annular structure into a U-shaped groove, and then plugging the U-shaped groove into an annular space between the tank wall (1) and the floating disc (2);
2.2, inserting a limiting hook (7) into a U-shaped groove of the secondary sealing belt (6), pressing an inner side groove wall of the secondary sealing belt (6) and a side groove wall of the primary sealing belt (5) on the floating disc (2), and extruding the U-shaped groove of the primary sealing belt (5) by the limiting hook (7) with an L-shaped structure to form a primary sealing space for containing the sponge filler in the step 1.3;
step 2.3, fixing the large end of the tongue-shaped belt (8) at the top of the floating disc (2), then pressing the outer groove wall of the secondary sealing belt (6) on the inner wall of the tank wall (1) through the small end of the tongue-shaped belt (8), so that the secondary sealing belt (6) forms a secondary sealing space under the support of the tongue-shaped belt (8), and simultaneously, the top of the outer groove wall of the secondary sealing belt (6) is laid on the upper surface of the tongue-shaped belt (8);
2.4, after the scraping plate (4) is attached to the tank wall (1) in a sliding mode, the top of the outer tank wall of the secondary sealing belt (6) is connected to the scraping plate (4);
and 2.5, connecting the inner wall of the bearing belt (3) with the annular structure to the top of the floating disc (2), and connecting the outer wall of the bearing belt (3) to the scraper (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321445.1A CN114524199A (en) | 2020-11-23 | 2020-11-23 | Floating roof tank sealing structure of labyrinth sealing belt and assembly process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321445.1A CN114524199A (en) | 2020-11-23 | 2020-11-23 | Floating roof tank sealing structure of labyrinth sealing belt and assembly process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114524199A true CN114524199A (en) | 2022-05-24 |
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| CN202011321445.1A Pending CN114524199A (en) | 2020-11-23 | 2020-11-23 | Floating roof tank sealing structure of labyrinth sealing belt and assembly process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115676155A (en) * | 2023-01-05 | 2023-02-03 | 北斗启明（北京）节能科技服务有限公司 | Inflatable bag type inner floating roof storage tank edge sealing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115676155A (en) * | 2023-01-05 | 2023-02-03 | 北斗启明（北京）节能科技服务有限公司 | Inflatable bag type inner floating roof storage tank edge sealing device |
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Application publication date: 20220524 |