CN214085938U - Wax scraping device above liquid level of storage tank - Google Patents
Wax scraping device above liquid level of storage tank Download PDFInfo
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- CN214085938U CN214085938U CN202022996215.7U CN202022996215U CN214085938U CN 214085938 U CN214085938 U CN 214085938U CN 202022996215 U CN202022996215 U CN 202022996215U CN 214085938 U CN214085938 U CN 214085938U
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- 238000007790 scraping Methods 0.000 title claims abstract description 50
- 239000007788 liquid Substances 0.000 title claims abstract description 30
- 238000007667 floating Methods 0.000 claims abstract description 59
- 238000009434 installation Methods 0.000 claims abstract description 39
- 238000005452 bending Methods 0.000 claims abstract description 23
- 239000000725 suspension Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 20
- 239000010935 stainless steel Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000007769 metal material Substances 0.000 claims description 7
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920006351 engineering plastic Polymers 0.000 claims description 4
- 239000008397 galvanized steel Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
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- 238000005520 cutting process Methods 0.000 claims description 3
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- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 239000012634 fragment Substances 0.000 abstract description 4
- 125000003003 spiro group Chemical group 0.000 abstract 2
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- 230000008021 deposition Effects 0.000 description 9
- 229910052755 nonmetal Inorganic materials 0.000 description 7
- 239000003921 oil Substances 0.000 description 6
- 239000012188 paraffin wax Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
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- 239000002184 metal Substances 0.000 description 2
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Abstract
A wax scraping device above the liquid level of a storage tank comprises a scraper, a mounting rack, a supporting arm, a force applying mechanism and a mounting adapter; the scraper is connected to the mounting frame, the upper end of the supporting arm is connected with the mounting frame, the lower end of the supporting arm is connected with the stress application mechanism, and the stress application mechanism is connected to the floating disc through the mounting adapter; the shape of the scraper is matched with the arc shape of the inner wall of the storage tank; the mounting frame is of a special-shaped frame body structure, the middle part of the mounting frame is a vertical frame provided with a bolt hole, a bolt rod of a bolt penetrates through the bolt hole and is fixed by a nut, the bolt rod is backwards in a suspension end, the bottom end of the vertical frame is bent backwards and downwards, and a bending point forms a guide supporting point; the support arm is the upper end and buckles backward and constitutes compensation arm, sets up the regulation slot hole of direction from top to bottom on the compensation arm, and the suspension end swing joint that penetrates the shank of bolt in the regulation slot hole, and the straining device is the shell fragment formula structure, and its one end is fixed with support arm lower extreme spiro union, and the other end and installation adapter spiro union are fixed. The utility model discloses longe-lived, compensation range is wide, the installation is simple reliable the security high, less pressure obtains better striking off the effect.
Description
Technical Field
The utility model relates to a storage tank liquid level top paraffin scraper belongs to crude oil storage tank or heavy oil storage tank paraffin scraper technical field.
Background
In the existing crude oil storage tank or heavy oil storage tank, in order to prevent the wax on the wall of the storage tank from condensing, a wax scraping device under the tank is arranged on the storage tank. The wax scraping device under the tank has various forms, and mainly comprises a heavy hammer type wax scraper, a spring sheet type wax scraper and the like according to the principle of a stress application mechanism, wherein problems are found in a part of structures along with the use for many years, the parts gradually leave the market, and the heavy hammer type wax scraper is a mainstream product at present. Along with the popularization of the prior novel spring sheet type seal in China, a novel spring sheet type wax scraper is also provided at present. In the existing wax scraper devices, the installation positions are all below the seal, some are installed at the bottom of the floating plate, some are arranged at the side of the floating chamber, but no matter which wax scraper device is under the liquid level, the height from the liquid level is generally 500 mm and 800mm, and thus, the wax accumulation on a small amount of liquid level is not removed actually. And the closer to the liquid level, the smaller the action of the heating coil at the bottom, the lower the temperature of the oil product, the more serious the wax precipitation, and the more and more wax deposition at the highest liquid level position of the tank wall along with the operation of the storage tank. When the oil is delivered from the storage tank, the accumulated wax at the high level part of the liquid level of the tank wall is leaked along with the descending of the floating plate, and once the accumulated wax is melted due to the action of sunlight and the like and flows above the floating plate, the waste of oil products is caused, and great potential safety hazards are generated. Crude oil wax precipitation wall hanging can produce various harm:
(1) the wall built-up wax deposition material can rise along with its temperature, and the material of hanging on the tank wall flows to the jar floating roof along the tank wall, must in time clear up, otherwise will flow through central drain pipe, runs into rain, will flow through the rainwater way, causes very big pollution and goods to lose. If the cleaning is performed manually, a great deal of manpower and material resources are needed.
(2) The wall built-up paraffin substance is its the different crystal of formation volume size at storage tank jar wall, can make comparatively level and smooth jar wall become unevenness, and then influences the adherence that the floating plate is sealed, causes its not tight sealedly, increases that the floating plate annular space VOCs volatilizees.
(3) The oil hung on the tank wall flows to the tank floating roof along the tank wall, which is equivalent to increase the weight of the floating roof and influences the safe operation of the floating roof.
For this reason, storage tanks now require a device that can remove the residual wax above the tank level.
At present, the product which can meet the requirements does not exist at home and abroad, the pressure of secondary sealing is generally increased, the secondary sealing is used for scraping off residual wax, but the sealing strip contacted with the tank wall is made of rubber materials in order to ensure the tightness of the secondary sealing and the tank wall, the residual wax cannot be removed in the places with cold weather or higher wax hardness, and a large amount of residual wax can flow onto the floating plate.
1. Potential safety hazard: because a large amount of wax substances flow to the upper surface of the floating disc, the floating disc is corroded firstly, so that the service life of the floating disc is reduced; secondly, once a fire happens above the floating plate due to lightning stroke and other reasons, serious accidents are caused because a large amount of combustible materials and combustible gas are arranged on the upper surface of the floating plate; thirdly, combustible materials such as crude oil and the like can flow out through a central drain pipe and are stored in positions such as a sewer or a sewage tank, and even greater safety accidents can be caused once the combustible materials meet fire sources.
2. Environmental benefits: in case of outflow of substances such as storage media, the water source can be polluted, a large amount of VOCs, toxic and harmful gases and the like can be generated, the environment is polluted, and the existing environment-friendly requirement is not met.
3. Economic effect: the loss of the storage medium causes direct economic loss, and large amounts of manpower and material resources are needed to be invested due to pollutant cleaning, air water source treatment and the like. Meanwhile, the service life of the storage tank is also shortened due to the aggravation of corrosion, and huge economic loss is caused.
In order to better remove the residual wax deposition, a storage tank wax scraping device above the liquid level is needed, and the wax scraping device is installed between primary seal and secondary seal, so that the device is small in size, simple in structure and convenient to install, and can effectively remove the residual wax deposition. The pressure of the wax scraper can be reduced due to scraping off the residual wax. But because the wax scraper is arranged above the liquid level, the operation of the wax scraper must be safe and reliable, and potential safety hazards to the operation of the floating disc cannot be caused. Therefore, a solution is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a wax device is scraped to storage tank liquid level top, its aim at solve strike off the residual wax deposition of storage tank liquid level top part and can not cause the technical problem of potential safety hazard to the operation of floating disc.
The utility model discloses a realize by following technical scheme:
a wax scraping device above the liquid level of a storage tank comprises a scraping knife, a supporting arm, a force applying mechanism and a mounting adapter; the scraper is connected to a mounting frame, the upper end of the supporting arm is connected to the mounting frame, the lower end of the supporting arm is connected to the stress application mechanism, and the stress application mechanism is connected to a floating disc (A) through the mounting adapter;
the shape of the scraper is an arc shape matched with the arc shape of the inner wall (C) of the storage tank;
the mounting frame is of a special-shaped frame body structure, the cross section of the mounting frame is approximately in a shape of a Chinese character 'ji', the top of the mounting frame is suspended forwards to form a scraper handle, the bottom of the scraper handle is fixedly connected with the scraper, a front-end cutting edge of the scraper extends out of the edge of the top of the frame, abuts against the inner wall of the storage tank and is attached to the inner wall of the storage tank, the middle of the mounting frame is a vertical frame, a bolt hole is formed in the vertical frame, a bolt rod of the bolt is suspended backwards after the bolt penetrates through the bolt hole and is fixed by a nut, the lower part of the vertical frame is arranged in a forward inclined mode, the bottom end of the vertical frame is bent backwards and downwards, and a bending point forms a guide supporting point and supports and guides against the inner wall of the storage tank;
the supporting arm is in a strip shape, the upper end of the supporting arm is bent backwards to form a compensation arm, the bending angle theta is 15-45 degrees, an adjusting long hole in the vertical direction is formed in the compensation arm, the suspension end of the bolt rod penetrates through the adjusting long hole and is movably connected, and the tail end of the suspension end is screwed and positioned by a check ring and a nut;
the stress application mechanism is of a spring sheet type structure, and one or more layers of elastic stainless steel plates are stacked together to form a spring sheet shape with the middle part bent outwards; one end of the stress application mechanism is in threaded connection and fixed with the lower end of the supporting arm, and the other end of the stress application mechanism is in threaded connection and fixed with the installation adapter.
Preferably, the wax scraping devices are arranged in a plurality along the circumferential direction of the inner wall of the storage tank, and the adjacent scrapers 1 are overlapped up and down from head to tail to cover the tank wall for a circle in a seamless mode.
Preferably, the scraper, the mounting frame and the supporting arm are all made of non-metal materials; the mounting adapter is made of galvanized steel plates or stainless steel materials.
Preferably, the scraper is made of nylon or polytetrafluoroethylene materials, and the mounting frame and the supporting arm are made of glass fiber reinforced plastics or engineering plastic materials.
Preferably, the lengths of the mounting adapter and the supporting arm are adjusted, so that the compensation range of the wax scraping device is not less than 400 mm.
Preferably, the scraper is arranged for one-way wax scraping, and when the floating disc moves upwards and does not scrape wax, the scraper is bent when the wax scraper moves upwards.
Preferably, the wax scraping device is installed between a common bag type primary seal (D) and an L-shaped secondary seal (E) of the floating disc, and the installation adapter is installed on the upper edge of the floating disc (A), namely an existing primary seal and secondary seal installation position (F).
Preferably, the wax scraping device is arranged at a spring sheet type primary sealing installation position (G) of the floating disc.
Preferably, the circumferential length of the scraper is not more than 1 m, and two adjacent mounting frames are connected with the same scraper together; the supporting arms are divided into a long arm and a short arm, so that the adjacent scrapers are overlapped end to end up and down in a seamless mode; the scraper is in contact with the tank wall by adopting an upright surface.
Preferably, the bending angle beta of the elastic sheet of the force applying mechanism is set within the range of 90-160 degrees; the lower end of the compensation arm is positioned above the bending point of the vertical frame.
The beneficial effects of the utility model
1. The service life is long: the stressing device in the wax scraping device adopts a spring plate structure, and the multilayer composite design of the stressing device ensures the uniformity of elasticity, avoids the weakening of the elasticity caused by metal fatigue, greatly prolongs the service life of the wax scraping device, and simultaneously facilitates the adjustment of the elasticity due to the use of the multilayer spring plates.
2. The compensation range is wide: the wax scraping device is designed by adopting the nonmetal elastic supporting arm, so that the supporting arm plays a supporting role, and simultaneously plays a role of prolonging the elastic force, the compensation range is enlarged, and the compensation range can meet the requirements of various current edge seals. Meanwhile, the use of the nonmetal elastic arm reduces the use of metal devices in a secondary sealing space, so that the operation safety is ensured.
3. The installation is simple reliable: the mounting bracket of scraper with scraper installation, connection support arm and guider and as an organic whole, the effectual whole volume that reduces the scraper has reduced device quantity simultaneously, the structure becomes the weight hammer type structure simplification of proportion, has cancelled various rotating member for the installation becomes easy and wax scraper's operational reliability has obtained the assurance.
4. The safety is high: the paraffin scraper supporting arm, the scraper and the mounting rack are all made of non-metal materials, so that the safety is further guaranteed.
5. A lower pressure achieves a better scraping effect: in order to ensure the scraping effect, certain pressure must be applied to the scraper, the scraping effect is in direct proportion to the pressure of the scraper acting on the wall of the storage tank within a certain range, and in a common heavy hammer type wax scraper, the weight of a heavy hammer and the length of a supporting beam can be adjusted to realize the scraping effect. However, in the present invention, since the size of the elastic member must be small due to the limitation of the installation space, in order to obtain a good effect, according to the pressure formula: p is the F/S, can increase pressure through the area of contact who reduces with the jar wall, so, the utility model discloses in, the scraper adopts the face of standing vertically and jar wall contact, perpendicular jar wall face contact promptly, has effectively reduced lifting surface, and the while plays the effect that prevents the upset through special design' S mounting bracket.
Drawings
FIG. 1 is a schematic view of the general structure of the present invention installed between the conventional bladder type primary seal and the L-shaped secondary seal of the floating plate,
FIG. 2 is a schematic view of the general structure of the spring sheet type primary seal installation position of the present invention installed on the floating plate,
figure 3 is a schematic side view of the support arm of the present invention,
FIG. 4 is a schematic view of the structure of the side surface of the scraper of the present invention connected to the mounting frame,
figure 5 is a perspective view of the scraper structure of the present invention,
FIG. 6 is a perspective view of the structure of the mounting rack of the present invention,
FIG. 7 is a perspective view of the structure of the present invention in which two mounting frames are connected to a scraper,
FIG. 8 is a schematic view of the structure of the lower wax scraper of the present invention,
FIG. 9 is a schematic structural view of the bending non-wax scraping device of the upward scraper of the present invention,
figure 10 is an enlarged partial schematic view of the upstream blade configuration of figure 9,
figures 11 to 13 are schematic structural views of the operation conditions of the present invention in different floating plate gaps,
figure 14 is a structural schematic diagram of a bag type sealing floating plate mounting floating plate limiting device,
figure 15 is a schematic view of the ascending structure of the present invention,
FIG. 16(1), (2) is a schematic view of the bending moment arm of the scraper of the present invention for ascending and descending,
FIG. 17 is a schematic view of the structure of the force applying mechanism of the present invention, in which a plurality of layers of elastic stainless steel plates are stacked together,
FIG. 18 is a schematic structural view of a plurality of wax scraping devices arranged along the circumferential direction of the inner wall of the storage tank according to the present invention;
description of the figure numbering:
The device comprises a floating disc A, a sealing bag B, a storage tank inner wall C, a primary sealing D, L type secondary sealing E, a secondary sealing installation position F, a spring sheet type primary sealing installation position G, a sealing spring sheet H, a downward bending moment arm of a liquid level K, L1 scraper and an upward bending moment arm of an L2 scraper;
Detailed Description
Referring to fig. 1 and 2, the wax scraping device above the liquid level of the storage tank of the present invention comprises a scraper 1, a mounting frame 2, a supporting arm 3, a force applying mechanism 4 and a mounting adapter 5; the scraper 1 is connected to the mounting frame 2, the upper end of the support arm 3 is connected to the mounting frame, the lower end of the support arm is connected to the stress application mechanism 4, and the stress application mechanism is connected to the floating plate A through the mounting adapter 5;
referring to fig. 5, the shape of the scraper 1 is an arc shape matched with the arc shape of the inner wall C of the storage tank so as to facilitate the attachment and wax scraping;
referring to fig. 4 and 6, the mounting frame 2 is a special-shaped frame structure, the cross section of the mounting frame is nearly in a shape of a Chinese character ji, the frame top 21 of the mounting frame is forwards suspended to form a scraper handle, the bottom of the scraper handle is fixedly connected with the scraper 1 and can be connected through a bolt, the front end cutting edge of the scraper extends out of the edge of the frame top 21 and is suspended and abutted on the inner wall of the storage tank and attached to the inner wall in an arc shape, the middle part of the mounting frame is a vertical frame 22 which is vertically arranged and is provided with a bolt hole 23, a bolt 24 penetrates through the bolt hole and is fixed through a nut, then a bolt rod 25 of the bolt is backwards suspended, the lower part of the vertical frame is forwards inclined, the bottom end is bent backwards and downwards, and a bending point 26 forms a guide supporting point and is abutted on the inner wall of the storage tank for supporting and guiding;
referring to fig. 3, the support arm 3 is a strip-shaped support arm, the upper end of the support arm is bent backwards to form a compensation arm 31, the bending angle θ is 15 to 45 °, the compensation arm is provided with an up-down adjustment long hole 32, the adjustment long hole is inserted into the suspension end of the bolt rod 25 to be movably connected, the tail end of the suspension end is screwed and positioned by a retaining ring and a nut, the compensation arm can adjust the compensation amount up and down and back and forth at the suspension end of the bolt rod 25, and the lower end of the compensation arm is located above the bending point 26 of the vertical frame 22;
referring to fig. 17, the force applying mechanism 4 is of a spring sheet type structure, and is formed by stacking one or more layers of elastic stainless steel plates to form a spring sheet shape with an outwardly bent middle part; one end of the stress application mechanism is in threaded connection and fixed with the lower end of the supporting arm, and the other end of the stress application mechanism is in threaded connection and fixed with the installation adapter.
Referring to fig. 18, a plurality of wax scraping devices are arranged in a circumferential direction of the inner wall of the storage tank, and adjacent scrapers 1 are overlapped end to end in a seamless manner to cover a circumference of the tank wall, so as to scrape wax on the circumference of the tank wall at the same time.
The scraper, the mounting frame and the supporting arm are all made of non-metal materials; the mounting adapter is made of galvanized steel plates or stainless steel materials.
Preferably, the scraper is made of nylon or polytetrafluoroethylene materials, and the mounting frame and the supporting arm are made of glass fiber reinforced plastics or engineering plastic materials.
Preferably, the length of the mounting adapter and the supporting arm is adjusted, so that the compensation range of the wax scraping device is not less than 400 mm.
Preferably, the scraper is a one-way wax scraper, and as shown in fig. 9, 10, 15, 16(2), when the floating disc runs upwards and does not scrape wax, the scraper is bent when running upwards.
Preferably, referring to fig. 1, the wax scraping device is installed between a common bag type primary seal (D) and an L-shaped secondary seal (E) of a floating disc, and the installation adapter 5 is installed on the upper edge of the floating disc (a), namely, an existing primary seal and secondary seal installation position (F).
Preferably, as shown in fig. 2, the wax scraping device is installed at a leaf spring type primary seal installation position (G) of the floating plate.
Preferably, referring to fig. 18 and 7, the circumferential length of the scraper is not more than 1 m, and two adjacent mounting frames 2 are connected with the same scraper 1 together; the supporting arms are divided into a long arm and a short arm, so that the adjacent scrapers are overlapped end to end in a seamless mode, wherein the upper scraper uses the long arm supporting arm, and the lower scraper uses the short arm supporting arm; the scraper is in contact with the tank wall by adopting an upright surface, namely vertical contact.
Preferably, referring to fig. 11 to 13, the bending angle β of the elastic sheet of the force applying mechanism 4 is set within a range of 90 degrees to 160 degrees. The lower end of the compensation arm is located above the bending point 26 of the vertical frame 22.
The technical characteristics of the utility model relates to a wax device is scraped to storage tank liquid level top:
the utility model discloses mainly constitute by following structure: the wax scraper is installed to be matched with the original floating disc in a sealing mode, and is free from fire;
a. force applying mechanism
Consider the utility model discloses a wax scraper installs between primary seal and secondary seal, needs small, so stress application mechanism adopts shell fragment formula structure, comprises individual layer or multilayer elasticity corrosion resistant plate. The principle of the shock-absorbing bow plate is similar to that of a shock-absorbing bow plate structure of an automobile, and the shock-absorbing bow plate structure has the characteristics of simplicity, reliability, long service life and the like; meanwhile, the pressure can be changed by adjusting the number of the elastic sheets, so that the pressure is not too large or insufficient. As shown in fig. 17, the multi-layer spring structure of the present invention is provided with a bending angle β of 90-160 degrees to ensure that the elasticity of the spring is not too low all the time, as shown in fig. 11 and 13.
b. Support arm
The supporting arm transmits the elastic force generated by the elastic sheet to the scraper, so that the effects of force transmission and scraper supporting are achieved; because wax scraping device moves more than the liquid level, in order to move safety, consider and adopt non-metallic material support arm, the utility model discloses well mainly adopt the glass steel material, glass steel has characteristics such as intensity height, longe-lived, corrosion-resistant, has extensive application in various occasions now.
Meanwhile, in order to ensure that the elastic force can be effectively transmitted to the scraper at each position of the floating disc, the front end of the supporting arm can be bent by a certain angle theta, generally between 15 degrees and 45 degrees, according to the compensation range of the storage tank, so that the force can be better transmitted.
c. Installation adapter
In order to ensure the installation strength of the wax scraper, the installation adapter is made of galvanized steel plates or stainless steel materials and is installed at a primary sealing installation position.
The mounting adapter of the utility model is different according to the different matching seals, if the mounting adapter is mounted between the common bag type primary seal and the L-shaped secondary seal, the mounting adapter is mounted on the upper edge of the floating plate, namely the mounting position of the existing primary seal and the secondary seal, as shown in figure 1; the installation adapter is characterized in that the bottom of the plate body is provided with an inclined section so as to be connected along the bending angle of the stress application mechanism, and the upper part of the plate body is attached to the installation position of the existing primary seal and secondary seal.
According to the regulation of national standard GB50341, the compensation range of the floating disc seal is generally +/-100 mm, but in actual operation, the fact that the actually required seal compensation range of a plurality of storage tanks is far beyond the value due to deformation is found, the compensation amount of the existing seal is insufficient, a large amount of oil gas is leaked, so that the existing edge sealing devices of a plurality of floating discs are changed into elastic sheet type efficient seal, and the compensation range is greatly enhanced as shown in figure 2.
The utility model can also be arranged on the spring sheet type high-efficiency seal, and the installation position is a spring sheet type primary seal installation position, as shown in figure 2;
d. scraping knife
In order to guarantee that the scraper can not only effectively strike off the residual wax deposition on the wall of the storage tank, but also can not cause potential safety hazard the utility model discloses in, adopt nonmetal scraper material, require that the hardness of scraper is moderate, coefficient of friction is low and resistant oil, characteristics such as corrosion-resistant. Therefore, the utility model discloses in, consider to adopt nylon or polytetrafluoroethylene material preparation scraper. The overall structure of scraper is like figure 5 the utility model discloses in, in order to guarantee that the scraper is inseparable with the arc laminating of jar wall, every storage tank all needs the diameter design scraper according to the storage tank, and the arc of scraper is the same with the arc of storage tank, can effectively guarantee the laminating of scraper and jar wall. As shown in fig. 5 and 7;
the mounting bracket of scraper also adopts glass steel or engineering plastics material, and simultaneously, for simple to operate, the mounting bracket adopts the dysmorphism structure, also can play the direction function simultaneously at the installation scraper, prevents that the scraper from producing the upset when the operation. The blade mounting frame is shown in fig. 4, 6 and 7;
in order to produce the convenience the utility model discloses in, the length of scraper is generally for being not more than 1 meter, and a plurality of scrapers are arranged along the jar wall, and in order to cover the jar wall completely, the support arm divide into long arm and short arm two kinds, has small length difference to overlap about convenient scraper adopts and arrange, like fig. 18. The length of the scraper is not more than 1 m, and two adjacent mounting frames can be connected with the same scraper 1 together.
The utility model discloses mounting bracket, support arm, stress application mechanism, installation adapter are the plate body structure that has suitable width, satisfy the operation of scraping, support.
The utility model discloses paraffin scraper's operation characteristics:
1. compensation range
According to the regulation of national standard GB50341, the edge gap of a common steel floating disc is 200mm as shown in figure 15, the compensation range of common sealing is +/-100 mm, and a floating disc limiting device is arranged below the floating disc, so that the minimum annular gap of the floating disc is ensured to be 100mm as shown in figure 14:
that is to say that the biggest marginal clearance of floating plate is 300mm according to the national standard, but in order to consider some floating plates because the built-up time is longer, the storage tank warp great, the utility model discloses temporarily use 350mm as the biggest clearance, in-service use, adjust installation adapter and support arm length as required, can design the compensation range 400mm or even bigger. Namely, the lengths of the installation adapter and the supporting arm are adjusted, and the compensation range of the wax scraping device is not less than 400 mm.
The utility model discloses in, if need bigger compensation range, then can prolong the support arm and guarantee, because compensation range maximum value S is support arm length L cos theta (the biggest inclination), the biggest inclination is generally no longer than 45 degrees, so can enlarge compensation range through the method of extension support arm, simultaneously in order to prevent wax scraper and secondary seal conflict, need reduce the mounted position of adapter.
2. The wax scraper at each position can effectively operate
In order to ensure the effective operation of the novel liquid level upper wax scraper, the wax scraper can be effectively attached to the wall of the storage tank at the maximum clearance, the minimum clearance and the normal position of the floating plate, and the phenomenon of overturning can not occur. Meanwhile, when the sealing device is at different positions, the sealing device does not interfere with the existing sealing.
As shown in the figures 11-13, the operation status of the wax scraper in different positions of the utility model can be seen, the wax scraper can effectively operate in the whole range of the floating plate gap by adjusting the position change between the long hole and the screw rod and the deformation of the elastic sheet of the stress application mechanism.
3. Unidirectional wax scraping setting
The utility model discloses a purpose is mainly in order to clear away the remaining wax deposition of wax scraper, when the floating plate upward operation, inside the wax deposition that produces on the storage tank can get into the storage tank, was got rid of under the original wax scraper of storage tank and the effect of heating. In the upward direction, no wax removal is required. When the floating plate moves downwards, wax deposition on the liquid surface above the original wax scraper leaks out as shown in figure 8, and at the moment, wax removal is needed.
The utility model discloses in, for the safety, the scraper is designed for non-metallic material, in order to increase the life-span of scraper, when the floating plate upwards, the scraper design reduces for the resistance, and the friction reduces. The utility model discloses in, wax scraper can be crooked when upwards moving, reduces with the resistance of jar wall. As shown in fig. 8 and 9; the scraper is arranged for one-way scraping of wax, when the floating disc is upward, the scraper is designed to reduce resistance and reduce friction, and when the wax scraper is upward, the wax scraper can be bent as shown in figure 10.
The utility model discloses in, the scraper is installed on the scraper frame, and the mounting bracket is except the function of installation scraper, also plays the purpose of strengthening the rigidity of scraper, but because the scraper is single face contact with the mounting bracket, so when the scraper goes upward with down, the crooked arm of force of scraper is different, can see by 16(1), (2) fig. 78, descending crooked arm of force L1 is short, the crooked arm of force L2 of going upward is long, the crooked volume of scraper is pressure friction coefficient crooked arm of force, so can obtain, the crooked volume of scraper when going upward is greater than the crooked volume when going downward. Thus, the bending amount of the scraper is increased during the upward movement, and the included angle alpha between the scraper and the tank wall is reduced in fig. 16(2), the upward and downward movement resistance of the scraper is the force for obstructing the operation generated by tiny obstacles on the tank wall besides the friction force, and the force is the obstacle resistance sin alpha, and the resistance is also reduced when the included angle alpha between the scraper and the tank wall is reduced due to the bending.
The utility model discloses wax scraper and current edge seal's matching performance:
in the floating roof edge seal commonly used now, mainly there are sealed, the mechanical seal of bag formula and the sealed three kinds of with high-efficient formula shell fragment, wherein mechanical seal is because the potential safety hazard is great, and the use has not been recommended at present domestically, the utility model discloses mainly seal with the sealed main adaptation object that is of bag formula and high-efficient formula shell fragment, in these two kinds of sealings, all can effectively install this wax scraping device.
The installation schematic diagrams of the bag type seal and the high-efficiency elastic sheet seal are shown in figures 1 and 2;
the technical essential of the utility model is that of wax scraper
1. A wax scraper on the liquid level is additionally arranged between the primary seal and the secondary seal;
2. using non-metal materials to manufacture scrapers, supporting arms and the like;
3. integrating the mounting frame of the scraper with the guiding function;
4. the scraper is designed by adopting an arc curve of the storage tank, so that the scraper is tightly attached to the storage tank;
5. and can be suitable for various sealed installation forms.
Claims (10)
1. A wax scraping device above the liquid level of a storage tank comprises a scraping knife, a supporting arm, a force applying mechanism and a mounting adapter; the scraper is characterized in that the scraper (1) is connected to an installation frame (2), the upper end of the supporting arm (3) is connected with the installation frame, the lower end of the supporting arm is connected with the stress application mechanism (4), and the stress application mechanism is connected to a floating disc (A) through the installation adapter (5);
the shape of the scraper (1) is an arc shape matched with the arc shape of the inner wall (C) of the storage tank;
the mounting frame (2) is of a special-shaped frame body structure, the cross section of the mounting frame is approximately in a shape like a Chinese character 'ji', the frame top (21) of the mounting frame is forwards suspended to form a scraper knife handle, the bottom of the scraper knife handle is fixedly connected with the scraper (1), the front end cutting edge of the scraper extends out of the edge of the frame top (21), abuts against the inner wall of the storage tank and is attached to the inner wall of the storage tank, a vertical frame (22) is arranged in the middle of the mounting frame, a bolt hole (23) is formed in the vertical frame, a bolt (24) penetrates through the bolt hole and is fixed through a nut, a bolt rod (25) of the bolt passes through the bolt hole and is backwards in a suspended end, the lower part of the vertical frame is forwards inclined, the bottom end of the vertical frame is bent backwards and downwards, and a bending point (26) forms a guide supporting point and abuts against the inner wall of the storage tank to support and guide;
the supporting arm (3) is in a strip shape, the upper end of the supporting arm is bent backwards to form a compensation arm (31), the bending angle theta is 15-45 degrees, an adjusting long hole (32) in the vertical direction is formed in the compensation arm, the suspension end penetrating through the bolt rod (25) in the adjusting long hole is movably connected, and the tail end of the suspension end is screwed and positioned by a check ring and a nut;
the stress application mechanism (4) is of a spring sheet type structure, and one or more layers of elastic stainless steel plates are stacked together to form a spring sheet shape with the middle part bent outwards; one end of the stress application mechanism is in threaded connection and fixed with the lower end of the supporting arm, and the other end of the stress application mechanism is in threaded connection and fixed with the installation adapter.
2. The wax scraping device for the upper part of the liquid level of the storage tank is characterized in that a plurality of wax scraping devices are arranged along the circumferential direction of the inner wall of the storage tank, and adjacent scrapers (1) are overlapped end to end up and down and seamlessly arranged to cover the periphery of the tank wall.
3. The device for scraping wax above the liquid level of the storage tank as claimed in claim 1, wherein the scraper, the mounting frame and the supporting arm are made of non-metallic materials; the mounting adapter is made of galvanized steel plates or stainless steel materials.
4. The device of claim 3, wherein the scraper is made of nylon or polytetrafluoroethylene, and the mounting bracket and the support arm are made of glass fiber reinforced plastic or engineering plastic.
5. The device of claim 1, wherein the length of the mounting adapter and the support arm is adjusted so that the compensation range of the wax scraper is not less than 400 mm.
6. The device for scraping wax above the liquid level of the storage tank as claimed in claim 1, wherein the scraper is a one-way scraper, and when the floating plate runs upwards and does not scrape wax, the scraper is bent when the floating plate runs upwards.
7. A device for scraping wax above the liquid level of a storage tank as claimed in claim 1, wherein the device is installed between the ordinary bag type primary seal (D) and the L-shaped secondary seal (E) of the floating plate, and the installation adapter (5) is installed on the upper edge of the floating plate (a), namely the existing primary seal and secondary seal installation position (F).
8. A device for scraping wax above the liquid level of a storage tank as claimed in claim 1, wherein the device is mounted at the primary seal mounting position (G) of the floating plate.
9. A device for scraping wax above the liquid level of a storage tank as claimed in claim 2, wherein the circumferential length of the scraping blade is not more than 1 m, and two adjacent mounting frames (2) are connected with the same scraping blade (1); the supporting arms are divided into a long arm and a short arm, so that the adjacent scrapers are overlapped end to end up and down in a seamless mode; the scraper is in contact with the tank wall by adopting an upright surface.
10. The wax scraping device above the liquid level of the storage tank as claimed in claim 1, characterized in that the bending angle β of the elastic sheet of the force applying mechanism (4) is set within the range of 90-160 degrees; the lower end of the compensation arm is positioned above a bending point (26) of the vertical frame (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022996215.7U CN214085938U (en) | 2020-12-14 | 2020-12-14 | Wax scraping device above liquid level of storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022996215.7U CN214085938U (en) | 2020-12-14 | 2020-12-14 | Wax scraping device above liquid level of storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214085938U true CN214085938U (en) | 2021-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022996215.7U Withdrawn - After Issue CN214085938U (en) | 2020-12-14 | 2020-12-14 | Wax scraping device above liquid level of storage tank |
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| Country | Link |
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| CN (1) | CN214085938U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112678358A (en) * | 2020-12-14 | 2021-04-20 | 沃德林科环保设备（北京）有限公司 | Wax scraping device above liquid level of storage tank |
| CN116374439A (en) * | 2023-04-06 | 2023-07-04 | 安徽美祥实业有限公司 | Flexible sealing device for petroleum storage tank |
-
2020
- 2020-12-14 CN CN202022996215.7U patent/CN214085938U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112678358A (en) * | 2020-12-14 | 2021-04-20 | 沃德林科环保设备（北京）有限公司 | Wax scraping device above liquid level of storage tank |
| CN112678358B (en) * | 2020-12-14 | 2024-05-31 | 沃德林科环保设备（北京）有限公司 | Wax scraping device above liquid level of storage tank |
| CN116374439A (en) * | 2023-04-06 | 2023-07-04 | 安徽美祥实业有限公司 | Flexible sealing device for petroleum storage tank |
| CN116374439B (en) * | 2023-04-06 | 2023-10-10 | 安徽美祥实业有限公司 | Flexible sealing device for petroleum storage tank |
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