CN108569487B - Water seal recovery device and method for emergency drainage device of external floating roof oil tank - Google Patents
Water seal recovery device and method for emergency drainage device of external floating roof oil tank Download PDFInfo
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- CN108569487B CN108569487B CN201710136593.8A CN201710136593A CN108569487B CN 108569487 B CN108569487 B CN 108569487B CN 201710136593 A CN201710136593 A CN 201710136593A CN 108569487 B CN108569487 B CN 108569487B
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- rubber plug
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 172
- 238000011084 recovery Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 138
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims 1
- 238000003860 storage Methods 0.000 abstract description 15
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 59
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
- B65D88/48—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle with fluid means acting on the seal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a water seal recovery device and a water seal recovery method for an emergency drainage device of an external floating roof oil tank, and belongs to the field of petroleum storage and transportation. The device comprises: a connecting rod; the support ring is sleeved at the middle lower part of the connecting rod, and the connecting rod horizontally rotates along the inner wall of the support ring; a support rod vertically connected with the support ring; a fixed circular ring connected with the lower end part of the supporting rod; a sealing rubber ring connected with the fixed ring; a screw rod connected with the lower end of the connecting rod; the sealing rubber plug is connected with the lower end part of the screw rod, is positioned between the supporting circular ring and the fixed circular ring, and has a maximum diameter larger than the inner diameter of the fixed circular ring; the first fastening ring and the second fastening ring are positioned on the upper surface and the lower surface of the sealing rubber plug and are respectively in spiral connection with the lower end part of the screw rod; and an anti-rotation baffle plate connected between the sealing rubber plug and the supporting rod. The water seal recovery device of the emergency drainage device of the external floating roof oil tank can effectively recover the water seal function of the emergency drainage device.
Description
Technical Field
The invention relates to the field of petroleum storage and transportation, in particular to a water seal recovery device and a method thereof for an emergency drainage device of an external floating roof oil tank.
Background
An external floating roof tank is a cylindrical steel tank for storing petroleum products having volatility such as crude oil, gasoline or kerosene, and an external floating roof (i.e., a floating disc) thereof rises or falls with a liquid storage level. In recent years, with the frequent occurrence of tank fire accidents, tank safety personnel are paying attention to safety of auxiliary equipment of an external floating roof tank, in particular, equipment for bringing the oil surface in the external floating roof tank into direct contact with air.
The emergency drainage device is auxiliary equipment on the tank top of the external floating roof storage tank, and when oil is in the emergency drainage device, the oil surface in the external floating roof storage tank is in direct contact with air, and the structure of the emergency drainage device is shown in fig. 1: a cover 14, a filter cover 15, a sealing ring 16, a drain pipe 17, a water sealing groove 18 with a sealed lower end surface and a float 19 positioned in the drain pipe 17 are sequentially connected from top to bottom. The emergency drainage device has the following specific functions: when the outer floating roof tank encounters rainfall and the rainfall is greater than the design displacement of the drain pipe 17 of the emergency drainage device (namely, the water surface height of the floating disc 20 is greater than the filter cover 15 of the emergency drainage device), the rainwater above the floating disc 20 flows to the lower part of the water seal tank 18 through the drain pipe 17, and then leaks into the outer floating roof tank 21 through the top small hole 1801 of the water seal tank, so that the floating disc 20 is prevented from sinking.
When the drain pipe 17 and the water seal tank 18 both contain water but not oil, the emergency drain device is in a normal state to perform a water seal function, i.e., to effectively seal the oil in the external floating roof tank 21 from directly contacting the air with the oil surface in the external floating roof tank 21. However, in actual operation, if the emergency drainage device is not added with water according to the standard requirement during production, or the outer floating roof tank 21 is in operation, the outer floating roof tank operator does not check the water sealing condition of the outer floating roof tank 21 according to the requirement and does not supplement water in time, so that the water in the drain pipe 17 of the emergency drainage device is evaporated, or the emergency drainage device is damaged, and the water sealing tank 18 cannot store water, so that the emergency drainage device cannot play a water sealing role, oil in the outer floating roof tank 21 enters the drain pipe 17 and the water sealing tank 18, and then the oil surface in the drain pipe 17 is directly contacted with air. In general, operators cannot check and judge the integrity of the emergency drainage device, even if water is added, the added water directly enters the water seal groove 18 because the density of the water is higher than that of the oil, and the risk is not eliminated because the water is still oil in the drainage pipe 17.
At present, the emergency drainage device has no corresponding method for solving the problem after oil is fed, and only water is added when the external floating roof storage tank is overhauled and put into production, so that the correction period is too long, and potential safety hazards are brought to the operation of the storage tank.
Disclosure of Invention
In order to solve the problem that the correction period is too long and potential safety hazards are brought to the operation of a storage tank in the prior art, the embodiment of the invention provides a water seal recovery device and a water seal recovery method of an emergency drainage device of an external floating roof oil tank. The technical scheme is as follows:
in one aspect, there is provided a water seal recovery device for an emergency drainage device for an external floating roof tank, the device comprising:
a connecting rod;
the support ring is sleeved at the middle lower part of the connecting rod, and the connecting rod horizontally rotates along the inner wall of the support ring;
a plurality of support rods vertically connected with the support ring;
a fixed circular ring connected with the lower end part of the supporting rod;
a sealing rubber ring connected with the fixed ring;
a screw rod connected to the lower end of the connecting rod;
the sealing rubber plug is connected with the lower end part of the screw rod, is positioned between the supporting circular ring and the fixed circular ring, and has a maximum diameter larger than the inner diameter of the fixed circular ring;
the first fastening ring and the second fastening ring are positioned on the upper surface and the lower surface of the sealing rubber plug and are respectively in spiral connection with the lower end part of the screw rod;
and the anti-rotation baffle is connected between the sealing rubber plug and the supporting rod.
Preferably, the anti-rotation baffle plate is composed of a first circular ring, a second circular ring and a connecting frame connected between the first circular ring and the second circular ring;
the first circular ring is sleeved outside the supporting rod, the second circular ring is sleeved outside the screw rod, and the second circular ring is fixed between the first fastening ring and the sealing rubber plug.
Preferably, the upper end of the supporting rod passes through the supporting circular ring and is respectively in spiral connection with nuts positioned on the upper surface and the lower surface of the supporting circular ring.
Preferably, a third ring and a fourth ring are welded at the middle lower part of the connecting rod, the third ring is positioned on the upper surface of the supporting ring, the fourth ring is positioned on the lower surface of the supporting ring, and the outer diameters of the third ring and the fourth ring are larger than the inner diameter of the supporting ring.
Preferably, the sealing rubber ring is located on the lower surface of the fixed ring, the first fixed ring is connected to the lower surface of the sealing rubber ring, and the fixed ring, the sealing rubber ring and the first fixed ring are connected through bolts.
Preferably, the fixed ring is a flange.
Preferably, the lower end of the supporting rod is connected with the fixed ring in a welding mode.
Preferably, the outer diameter of the sealing rubber plug is gradually reduced from top to bottom.
Preferably, the upper end of the connecting rod is spirally connected with an extension rod, and a plurality of handles are uniformly welded along the circumference of the extension rod.
On the other hand, the water seal recovery method of the emergency drainage device of the external floating roof oil tank is provided, and the method comprises the following steps:
a. injecting water with a water injection quantity larger than the design water injection quantity of the emergency drainage device into the drainage pipe, and standing for a preset time;
b. inserting a water seal recovery device into the drain pipe until the water seal recovery device approaches the oil level in the drain pipe, and then injecting water into the drain pipe, wherein a sealing rubber plug of the water seal recovery device seals and fixes the circular ring;
c. when the water surface in the drain pipe is higher than the oil surface by a preset distance, slowly lowering the water seal recovery device until reaching the bottom of the drain pipe;
d. rotating the connecting rod to enable the sealing rubber plug to move until the sealing rubber plug leaves the fixed circular ring;
e. and slowly lifting the water seal recovery device upwards until the water seal recovery device leaves the drain pipe, and then stopping water injection.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
the fixed ring is connected with the sealing rubber ring, the lower end part of the screw rod is connected with the sealing rubber plug, and the inner hole of the fixed ring is matched with the sealing rubber plug, so that the fixed ring, the sealing rubber ring and the sealing rubber plug can form a sealing surface in the inner cavity of the drain pipe to completely replace oil in the drain pipe into water, and after replacement, the obvious water surface can be seen in the drain pipe of the emergency drain device, and after water sealing is restored, the oil surface in the drain pipe is not contacted with air, so that the potential safety hazard of the storage tank is eliminated; in addition, through with the rotatable cover of support ring in the well lower part of connecting rod, not only make first clamping ring and second clamping ring follow the screw rod of horizontal rotation and reciprocate, realized the upper and lower removal of sealing rubber stopper, also avoided sealing rubber stopper to break away from in the round hole of support ring moreover, be favorable to extracting this water seal recovery device from the drain pipe in, saved operating time and manpower, reduced the potential safety hazard that the storage tank operation brought.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of an emergency drainage apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a water seal recovery device according to an embodiment of the present invention;
fig. 3 is a schematic structural view of an anti-rotation baffle according to an embodiment of the present invention.
Wherein, each reference numeral in the drawings is as follows:
1. the connecting rod, 101 the third circular ring, 102 the fourth circular ring;
2. a support ring;
3. a support rod;
4. a fixed ring 401 is used for fixing the inner hole of the ring;
5. a sealing rubber ring;
6. a screw;
7. sealing the rubber plug;
8. a first fastening ring;
9. a second fastening ring;
10. the anti-rotation baffle plate, a 1001 first circular ring, a 1002 second circular ring and a 1003 connecting frame;
11. a first fixing ring;
12. a bolt;
13. an extension bar, 1301 handle;
14. a cover body;
15. a filter cover;
16. a seal ring;
17. a drain pipe;
18. a water seal groove 1801 is arranged at the top small hole of the water seal groove;
19. a float;
20. a floating plate;
21. an outer floating roof tank.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
In one aspect, an embodiment of the present invention provides a water seal recovery device of an emergency drainage device for an external floating roof tank, as shown in fig. 2, the water seal recovery device includes: a connecting rod 1; the support ring 2 is sleeved at the middle lower part of the connecting rod 1, and the connecting rod 1 can horizontally rotate along the inner wall of the support ring 2; a plurality of support rods 3 vertically connected to the support ring 2; a fixed ring 4 connected with the lower end of the support rod 3; a sealing rubber ring 5 connected to the fixed ring 4; a screw 6 connected to the lower end of the connecting rod 1; a sealing rubber plug 7 connected with the lower end of the screw rod 6, wherein the sealing rubber plug 7 is positioned between the supporting circular ring 2 and the fixed circular ring 4, and the maximum diameter of the sealing rubber plug 7 is larger than the inner diameter of the fixed circular ring 4; a first fastening ring 8 and a second fastening ring 9 which are positioned on the upper surface and the lower surface of the sealing rubber plug 7 and are respectively in spiral connection with the lower end part of the screw rod 6; an anti-rotation baffle 10 connected between the sealing rubber plug 7 and the support rod 3.
The operation principle of the water seal restoring device will be explained below.
If the water sealing function of the emergency drainage device is to be restored, the drain pipe 17 of the emergency drainage device and the oil in the water sealing tank 18 are required to be replaced by water completely, after the oil in the water sealing tank 18 is replaced by water completely, the water sealing restoration device in a sealing state (namely, the inner hole 401 of the sealing rubber plug 7 for sealing the fixed ring) is inserted into the drain pipe 17 of the emergency drainage device and water is injected, and as the fixed ring 4, the sealing rubber ring 5 and the sealing rubber plug 7 form sealing surfaces in the inner cavity of the drain pipe 17, the sealing surfaces form a barrier between the oil surface and the water surface in the drain pipe 17, namely, the upper part of the sealing surfaces is water and the lower part of the sealing surfaces is oil; when the sealing surface of the water seal recovery device reaches the bottom of the drain pipe 17, the connecting rod 1 is rotated, the sealing rubber plug 7 is moved upwards until the sealing rubber plug leaves the inner hole 401 of the fixed circular ring, the sealing surface is further conducted, then the water seal recovery device is lifted out of the drain pipe 17, water is left in the drain pipe 17 through the inner hole 401 of the fixed circular ring and does not move upwards along with the water seal recovery device, and when the emergency drain device leaves the drain pipe 17, oil in the drain pipe 17 is completely replaced with water, so that the water seal purpose of the emergency device is recovered.
Wherein, the up and down movement of the sealing rubber plug 7 is realized by the movement of the first fastening ring 8 and the second fastening ring 9 which are positioned on the upper surface and the lower surface of the sealing rubber plug 7, specifically: when the connecting rod 1 rotates horizontally anticlockwise or clockwise (can not move up and down), the sealing rubber plug 7, the first fastening ring 8 and the second fastening ring 9 as a whole firstly do small-amplitude horizontal rotation along with the connecting rod 1, then the sealing rubber plug 7 is fixed on the supporting rod 3 through the anti-rotation baffle 10 and does not rotate, the screw rod 6 positioned at the lower end part of the connecting rod 1 continues to rotate, so that the first fastening ring 8 and the second fastening ring 9 which are in spiral connection with the screw rod 6 move up and down along the threads of the connecting rod 1, further the sealing rubber plug 7 is driven to move up and down, and finally the sealing rubber plug 7 is sealed or leaves the inner hole 401 of the fixed circular ring.
It will be understood by those skilled in the art that, in order to form the sealing surfaces of the fixed ring 4, the sealing rubber ring 5 and the sealing rubber plug 7 in the inner cavity of the drain pipe 17, and to make the water seal restoration device in the inner cavity of the drain pipe 17 in a static state, the connecting rod 1 is convenient to rotate so as to enable the sealing rubber plug 7 to move up and down, so that the outer diameter of the sealing rubber ring 5 is larger than the inner diameter of the drain pipe 17, and the outer diameter of the sealing rubber ring 5 is larger than the outer diameter of the fixed ring 4, so that the sealing rubber ring 5 can be sufficiently deformed to be tightly attached to the inner wall of the drain pipe 17. In addition, the maximum diameter of the sealing rubber plug 7 is larger than the inner diameter of the fixed ring 4, and the minimum diameter of the sealing rubber plug 7 is smaller than the inner diameter of the fixed ring 4, so that the sealing rubber plug 7 can be firmly embedded into the inner hole 401 of the fixed ring, and the purpose of completely sealing the inner hole 401 of the fixed ring is achieved.
It can be seen that by connecting the fixed ring 4 with the sealing rubber ring 5 and connecting the lower end of the screw 6 with the sealing rubber plug 7, and matching the inner hole 401 of the fixed ring with the sealing rubber plug 7, the fixed ring 4, the sealing rubber ring 5 and the sealing rubber plug 7 can form sealing surfaces in the inner cavity of the drain pipe 17 so as to completely replace oil in the drain pipe 17 with water, and after replacement, an obvious water surface can be seen in the drain pipe 17 of the emergency drain device, when the water seal is restored, the oil surface in the drain pipe 17 is not contacted with air, and the potential safety hazard of the storage tank is eliminated; in addition, through with the rotatable cover of support ring 2 in the well lower part of connecting rod 1, not only make first clamping ring 8 and second clamping ring 9 follow the screw rod 6 of horizontal rotation and reciprocate, realized the upper and lower removal of sealing rubber stopper 7, also avoided sealing rubber stopper 7 to break away from the round hole of support ring 2 in addition, be favorable to extracting this water seal recovery device from drain pipe 17 in, saved operating time and manpower, reduced the potential safety hazard that the storage tank operation brought.
As described in the above embodiment, the anti-rotation baffle 10 is used to fix the sealing rubber plug 7 to prevent the sealing rubber plug 7 from rotating along with the connecting rod 1, wherein the structure of the anti-rotation baffle 10 is various, and the structure of the anti-rotation baffle 10 is not limited in detail, but the sealing rubber plug 7 can be effectively fixed, for example, the structure of the anti-rotation baffle 10 in the embodiment is as shown in fig. 3: the anti-rotation baffle 10 is composed of a first circular ring 1001, a second circular ring 1002 and a connecting frame 1003 connected between the first circular ring 1001 and the second circular ring 1002; the first ring 1001 is sleeved outside the support rod 3, the second ring 1002 is sleeved outside the screw rod 6, and the second ring 1002 is fixed between the first fastening ring 8 and the sealing rubber plug 7. It can be seen that this structure is not only convenient for connection, but also for processing.
Further, as shown in fig. 2, in order to facilitate replacement of the anti-rotation baffle 10, the upper end portion of the support rod 3 in this embodiment is vertically connected to the support ring 2 by a bolt connection manner, and the specific connection manner is as follows: the upper end of the support rod 3 passes through the support ring 2 and is respectively in threaded connection with nuts positioned on the upper surface and the lower surface of the support ring 2. When the upper end of the support rod 3 is connected with the support ring 2 in the above manner, if the anti-rotation baffle 10 is replaced, the second ring 1002 of the anti-rotation baffle 10 can be detached from the screw 6, then the support ring 2 is detached from the support rod 3, the connecting rod 1 is lifted up, and finally the anti-rotation baffle 10 sleeved on the support rod 3 can be replaced. In order to reduce the processing and production time of the support ring 2, the support ring 2 may be selected as a flange.
Further, in actual operation, the support ring 2 is sleeved at the middle lower part of the connecting rod 1, and the connecting rod 1 can only horizontally rotate along the inner wall of the support ring 2 and cannot move up and down, preferably, as shown in fig. 2, the middle lower part of the connecting rod 1 in the embodiment is welded with a third ring 101 and a fourth ring 102, the third ring 101 is positioned on the upper surface of the support ring 2, the fourth ring 102 is positioned on the lower surface of the support ring 2, and the outer diameters of the third ring 101 and the fourth ring 102 are larger than the inner diameter of the support ring 2, namely, the support ring 2 is clamped between the third ring 101 and the fourth ring 102, so that the connecting rod 1 can only horizontally rotate along the inner wall of the support ring 2 and cannot move up and down; moreover, the connection mode is convenient for installation, for example, the third circular ring 101, the supporting circular ring 2 and the fourth circular disc 102 can be sleeved on the outer side of the middle lower part of the connecting rod 1 in sequence, and then the third circular disc 101 and the fourth circular disc 102 are welded on the outer side of the middle lower part of the connecting rod 1 respectively.
Further, in actual operation, in order to facilitate installation and replacement of the sealing rubber ring 5 and fix the sealing rubber ring 5 more firmly, as shown in fig. 2, the sealing rubber ring 5 in this embodiment is located on the lower surface of the fixed ring 4 and connected with the fixed ring 4, and the lower surface of the sealing rubber ring 5 is connected with the first fixing ring 11. Of course, the sealing rubber ring 5 may be located on the upper surface of the fixing ring 4 and connected to the fixing ring 4, and the first fixing ring 11 may be connected to the upper surface of the sealing rubber ring 5. It will be appreciated by those skilled in the art that in order to allow the sealing rubber ring 5 to closely conform to the inner wall of the drain pipe 17, the outer diameter of the first fixing ring 11 should be smaller than the outer diameter of the sealing rubber ring 5 so as not to affect the deformation of the sealing rubber ring 5.
Further, as shown in fig. 2, the fixing ring 4, the sealing rubber ring 5 and the first fixing ring 11 may be connected by bolts 12, that is, the bolts 12 sequentially pass through the first fixing ring 11, the sealing rubber ring 5 and the fixing ring 4, and nuts are screwed on the upper ends of the bolts 12 to fasten the fixing ring 4, the sealing rubber ring 5 and the first fixing ring 11. The mode of adopting bolted connection is convenient for not only installing sealing rubber ring 5 and first retainer plate 11 on fixed ring 4, also is convenient for change sealing rubber ring 5. Preferably, the fixing ring 4 may be a flange, because the flange itself is configured to allow the bolts 12 to pass through the circumferential circular holes (i.e. the plurality of small circular holes arranged along the circumferential direction of the flange) on the flange to connect the sealing rubber ring 5 with the first fixing ring 11, so that when the water seal recovery device is lifted out of the drain pipe 17, water can flow out from the central hole of the flange and remain in the drain pipe 17, and then oil in the drain pipe 17 is replaced by water, and in addition, the flange is a common part in the art, so that the use is convenient. Further, when the fixing ring 4 is a flange, the bolts 12 pass through the circumferential circular holes on the flange, so that the lower end portion of the support rod 3 can be connected with the portion located between the circumferential circular holes and the central circular hole of the flange, and in order to facilitate connection between the support rod 3 and the fixing ring 4, the lower end portion of the support rod 3 in the embodiment is connected with the fixing ring 4 by welding, so that the connection is not only firm, but also convenient to operate.
The shape of the sealing rubber plug 7 is various, and preferably, the outer diameter of the sealing rubber plug 7 in this embodiment gradually increases from top to bottom, that is, the cross section of the sealing rubber plug 7 is trapezoidal, the maximum diameter of the sealing rubber plug 7 is larger than the inner diameter of the fixed ring 4, and the minimum diameter of the sealing rubber plug 7 is smaller than the inner diameter of the fixed ring 4, so that the shape of the sealing rubber plug 7 is not only convenient for embedding the lower part of the sealing rubber plug 7 into the inner hole 401 of the fixed ring more firmly, but also improves the fitting tightness degree of the sealing rubber plug 7 and the inner wall of the fixed ring 4.
Preferably, as shown in fig. 2, the upper end portion of the connecting rod 1 is spirally connected with an extension rod 13, so that not only can the sealing surface of the water seal restoration device reach the bottom of the drain pipe 17, but also the water seal restoration device is convenient to carry. In addition, in order to facilitate the screw connection of the extension rod 13 with the upper end portion of the connection rod 1 and the rotation of the connection rod 1, a plurality of handles 1301 may be welded uniformly along the circumferential direction of the extension rod 13. It should be noted that, in order not to affect the rotation of the connecting rod 1, that is, not to affect the up and down movement of the sealing rubber stopper 7, the screw thread direction of the extension rod 13 is opposite to the screw thread direction of the screw rod 6, for example, the embodiment may rotate the extension rod 13 clockwise to separate the sealing rubber ring 5 in the sealed water seal restoring device from the fixed ring 4, and rotate the extension rod 13 clockwise to make the connection between the extension rod 13 and the connecting rod 1 more and more firm, thereby avoiding that the lower end of the extension rod 13 is separated from the upper end of the connecting rod 1 while separating the sealing rubber ring 5 from the fixed ring 4; in practice, for convenience of operation, before the water seal recovery device is inserted into the drain pipe 17, the connecting rod 1 may be rotated to insert the sealing rubber plug 7 into the inner hole 401 of the fixed ring, and then the connecting rod 1 may be fixed to be screwed with the extension rod 13.
On the other hand, the embodiment of the invention provides a water seal recovery method of an emergency drainage device of an external floating roof oil tank, which comprises the following steps:
a. injecting water with a water injection amount larger than the design water injection amount of the emergency drainage device into the drainage pipe 17, and then standing for a preset time;
b. inserting a water seal recovery device into the drain pipe 17 until the water seal recovery device approaches the oil level in the drain pipe 17, and then injecting water into the drain pipe 17, wherein a sealing rubber plug 7 of the water seal recovery device seals and fixes the circular ring 4;
c. when the water surface in the drain pipe 17 is higher than the oil surface by a preset distance, slowly draining the water seal recovery device until reaching the bottom of the drain pipe 17;
d. rotating the connecting rod 1 to move the sealing rubber plug 7 upwards until the sealing rubber plug 7 leaves the fixed circular ring 4;
e. the water seal recovery device is slowly lifted up until it leaves the drain pipe 17, and then the water injection is stopped.
In step a, before water is injected into the drain pipe 17, the cover 14 of the emergency drain device is opened, the seal ring 16 is removed, and the float 19 in the drain pipe 17 is taken out. Further, the water injection amount of the water greater than the design water injection amount of the emergency water discharge device is injected into the water discharge pipe 17 to replace the oil in the water seal tank 18 with water, and the principle is as follows: the water injected into the drain pipe 17 enters the bottom of the water seal tank 18 because of being insoluble in oil and having a higher density than the oil, and as the amount of injected water increases, the water in the water seal tank 18 increases and presses the oil located above it into the outer floating roof tank 21, and when the inside of the water seal tank 18 is all water, the oil inside the water seal tank 18 has been completely replaced by the water, and the oil inside the drain pipe 17 is always located inside the drain pipe. If the step b is directly started without injecting water into the drain pipe 17, which is larger than the designed water injection amount of the emergency drain device, the water seal tank 18 still stores oil, because when the seal recovery device reaches the bottom of the drain pipe 17, the oil in the water seal tank 18 is fully introduced into the outer floating roof tank 21, and the oil in the drain pipe 17 is introduced into the water seal tank 18, even if the oil in the drain pipe 17 is replaced with water, the water in the water seal tank 18 enters the drain pipe 17 due to the density of the oil being smaller than that of the water, so that the oil surface of the drain pipe 17 is directly contacted with air, and the water seal effect is not achieved.
It should be noted that in actual operation, water is generally injected into the drain pipe 17 of the emergency drain device by using a water gun, which causes water entering the bottom of the water seal tank 18 to carry a small amount of oil, in order not to make the oil level in the water seal tank 18, the emergency drain device should be kept stationary for 10 minutes according to production experience, so that the oil in the water seal tank 18 floats on the upper portion of the water seal tank 18, and likewise, a very small amount of oil floats on the upper portion of the drain pipe 17, and when the seal recovery device reaches the bottom of the drain pipe 17, the oil in the upper portion of the water seal tank 18 is squeezed into the outer floating roof tank 21.
In step c, according to production experience, when the water level in the drain pipe 17 is about 50cm higher than the oil level in the drain pipe 17, the water seal recovery device is slowly released until reaching the bottom of the drain pipe 17. The slow-down water seal recovery device is used for enabling the oil in the drain pipe 17 to enter the bottom of the water seal tank 18, and then fully float to the top of the water seal tank 18 due to the fact that the density of the oil is smaller than that of water, and then enter the outer floating roof storage tank 21 along with the downward movement of the water seal recovery device, so that when the water seal recovery device reaches the bottom of the drain pipe 17, the oil in the drain pipe 17 enters the outer floating roof storage tank 21.
Because the drain pipe 17 is formed by welding tubular columns with different inner diameters, in order to ensure that the water surface in the drain pipe 17 is always about 50mm higher than the oil surface, water is continuously injected into the drain pipe 17 in the process of lowering the water seal recovery device.
In step d, the connecting rod 1 is rotated to move the sealing rubber stopper 7 upward until the sealing rubber stopper 7 is separated from the fixed ring 4, so that water on the sealing surfaces formed by the fixed ring 4, the sealing rubber ring 5 and the sealing rubber stopper 7 on the drain pipe 17 is introduced into the drain pipe 17 through the inner hole 401 of the fixed ring, and further oil in the drain pipe 17 is replaced with water. In this process, water should be continuously injected into the drain pipe 17 to ensure that the water level in the drain pipe 17 is about 50mm higher than the oil level.
After the above steps are completed, it is checked whether the liquid level in the drain pipe 17 is the oil level or the water level, and if the liquid level is the oil level and a large amount of oil exists, the steps a to e are continued until the drain pipe 17 is completely filled with water.
Therefore, the water seal recovery method of the emergency drainage device of the external floating roof oil tank provided by the embodiment of the invention not only can effectively replace the oil in the emergency drainage device into water completely, but also can recover the water seal function; and the operation is convenient, a large amount of time is saved, and the potential safety hazard caused by the operation of the storage tank is eliminated.
Any combination of the above-mentioned optional solutions may be adopted to form an optional embodiment of the present disclosure, which is not described herein in detail.
The foregoing description is only for the convenience of those skilled in the art to understand the technical solution of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a water seal recovery unit of outer floating roof oil tank emergency drainage device which characterized in that, water seal recovery unit includes:
a connecting rod (1);
the support ring (2) is sleeved at the middle lower part of the connecting rod (1), and the connecting rod (1) horizontally rotates along the inner wall of the support ring (2);
a plurality of support rods (3) vertically connected with the support ring (2);
a fixed ring (4) connected with the lower end part of the supporting rod (3);
the sealing rubber ring (5) is connected with the fixed ring (4), and the outer diameter of the sealing rubber ring (5) is larger than the inner diameter of the drain pipe (17) and larger than the outer diameter of the fixed ring (4);
a screw (6) connected to the lower end of the connecting rod (1);
the sealing rubber plug (7) is connected with the lower end part of the screw rod (6), the sealing rubber plug (7) is positioned between the supporting circular ring (2) and the fixing circular ring (4), the cross section of the sealing rubber plug (7) is trapezoid, the maximum diameter of the sealing rubber plug (7) is larger than the inner diameter of the fixing circular ring (4), and the minimum diameter of the sealing rubber plug (7) is smaller than the inner diameter of the fixing circular ring (4);
a first fastening ring (8) and a second fastening ring (9) which are positioned on the upper surface and the lower surface of the sealing rubber plug (7) and are respectively in spiral connection with the lower end part of the screw rod (6);
an anti-rotation baffle (10) connected between the sealing rubber plug (7) and the supporting rod (3);
and the extension rod (13) is in threaded connection with the upper end part of the connecting rod (1), and the thread direction of the extension rod (13) is opposite to the thread direction of the screw rod (6).
2. The water seal restoration device according to claim 1, wherein the anti-rotation baffle (10) is composed of a first ring (1001), a second ring (1002) and a connection frame (1003) connected between the first ring (1001) and the second ring (1002);
the first circular ring (1001) is sleeved outside the supporting rod (3), the second circular ring (1002) is sleeved outside the screw rod (6), and the second circular ring (1002) is fixed between the first fastening ring (8) and the sealing rubber plug (7).
3. The water seal restoration device according to claim 2, wherein the upper end portion of the support rod (3) passes through the support ring (2) and is screwed with nuts respectively positioned on the upper and lower surfaces of the support ring (2).
4. The water seal recovery device according to claim 1, wherein a third ring (101) and a fourth ring (102) are welded at the middle lower part of the connecting rod (1), the third ring (101) is positioned on the upper surface of the supporting ring (2), the fourth ring (102) is positioned on the lower surface of the supporting ring (2), and the outer diameters of the third ring (101) and the fourth ring (102) are larger than the inner diameter of the supporting ring (2).
5. The water seal recovery device according to claim 1, wherein the sealing rubber ring (5) is located on the lower surface of the fixing ring (4), a first fixing ring (11) is connected to the lower surface of the sealing rubber ring (5), and bolts (12) are used for connecting the fixing ring (4), the sealing rubber ring (5) and the first fixing ring (11).
6. The water seal recovery device according to claim 5, wherein the fixed ring (4) is a flange.
7. The water seal restoration device according to claim 6, wherein the lower end portion of the supporting rod (3) is connected with the fixed ring (4) by welding.
8. The water seal recovery device according to claim 1, wherein the outer diameter of the sealing rubber stopper (7) gradually decreases from top to bottom.
9. The water seal recovery device according to any one of claims 1 to 8, wherein a plurality of handles (1301) are welded uniformly along the circumference of the extension rod (13).
10. A water seal recovery method of an emergency drainage device of an external floating roof tank, characterized in that the method is implemented by using the water seal recovery device of claim 1, and the method comprises the following steps:
a. injecting water with a water injection amount larger than the design water injection amount of the emergency drainage device into the drainage pipe (17), and standing for a preset time;
b. inserting a water seal recovery device into the drain pipe (17) until the water seal recovery device approaches the oil level in the drain pipe (17), and then injecting water into the drain pipe (17), wherein a sealing rubber plug (7) of the water seal recovery device seals and fixes the circular ring (4);
c. slowly lowering the water seal recovery device until reaching the bottom of the drain pipe (17) when the water surface in the drain pipe (17) is higher than the oil surface by a preset distance;
d. rotating the connecting rod (1) to enable the sealing rubber plug (7) to move upwards until the sealing rubber plug (7) leaves the fixed circular ring (4);
e. and slowly lifting the water seal recovery device upwards until the water seal recovery device leaves the drain pipe (17), and then stopping water injection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710136593.8A CN108569487B (en) | 2017-03-08 | 2017-03-08 | Water seal recovery device and method for emergency drainage device of external floating roof oil tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710136593.8A CN108569487B (en) | 2017-03-08 | 2017-03-08 | Water seal recovery device and method for emergency drainage device of external floating roof oil tank |
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| CN108569487A CN108569487A (en) | 2018-09-25 |
| CN108569487B true CN108569487B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710136593.8A Active CN108569487B (en) | 2017-03-08 | 2017-03-08 | Water seal recovery device and method for emergency drainage device of external floating roof oil tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111453216B (en) * | 2020-04-28 | 2024-06-11 | 安徽实华工程技术股份有限公司 | Height-adjustable floating roof support with wedge surface sealing structure |
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| CN108569487A (en) | 2018-09-25 |
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