阅读说明：本技术 一种浮顶储罐用高效无油气密封装置 (High-efficiency oil-free air sealing device for floating roof storage tank ) 是由 徐礼义 章桂生 杨瑞楼 焦士六 李勇 陶钧 叶银安 王琳 于 2020-07-28 设计创作，主要内容包括：本发明涉及一种浮顶储罐用高效无油气密封装置。该装置包括一次密封组件、二次密封组件和无油气密封组件,一次密封组件和二次密封组件设置于储罐罐壁的内侧面和浮盘边缘板的外侧面之间,无油气密封组件包括海绵状软弹物,海绵状软弹物充填于一次密封组件和二次密封组件之间的浮顶储罐空间,且跟随浮盘边缘板的浮动而上下移动,实现一次密封组件和二次密封组件之间的浮顶储罐空间的密封,高分子油气齿膜与储罐内侧罐壁的贴合处设置有无油气密封段锯齿状凸起。本发明可以在不影响储罐一、二次密封安全运行的前提下,极大限度的减小一、二次密封之间的油气空间,保证储罐的安全运行。(The invention relates to a high-efficiency oil-free air sealing device for a floating roof storage tank. The device includes primary seal subassembly, secondary seal subassembly and do not have oily gas seal subassembly, primary seal subassembly and secondary seal subassembly set up between the medial surface of storage tank wall and the lateral surface of floating plate edge board, it includes the soft bullet thing of spongy form to do not have oily gas seal subassembly, the soft bullet thing of spongy form fills the floating roof storage tank space between primary seal subassembly and secondary seal subassembly, and follow floating of floating plate edge board and reciprocate, realize the sealing in floating roof storage tank space between primary seal subassembly and the secondary seal subassembly, polymer oil gas tooth membrane is provided with the oily gas seal section cockscomb structure arch with the laminating department of the inboard tank wall of storage tank. The invention can greatly reduce the oil-gas space between the primary seal and the secondary seal on the premise of not influencing the safe operation of the primary seal and the secondary seal of the storage tank, thereby ensuring the safe operation of the storage tank.)

1. The utility model provides a floating roof is high-efficient oil-free air sealing device for storage tank which characterized in that, the device includes following component parts:

the primary sealing assembly (10) is fixedly arranged between the inner side surface of the tank wall (50) of the storage tank and the outer side surface of the floating disc edge plate (40) and is used for realizing the inner side sealing of the floating roof storage tank;

the secondary sealing assembly (20) is arranged between the inner side surface of the tank wall (50) of the storage tank and the outer side surface of the floating disc edge plate (40) in a sliding mode, is higher than the primary sealing assembly (10) in height and is used for sealing the top of the floating roof storage tank;

the oil-free air sealing assembly (30) comprises a spongy soft elastic object (32), wherein the spongy soft elastic object (32) is filled in a floating roof storage tank space between the primary sealing assembly (10) and the secondary sealing assembly (20) and moves up and down along with the floating of the floating plate edge plate (40), so that the sealing of the floating roof storage tank space between the primary sealing assembly (10) and the secondary sealing assembly (20) is realized.

2. The efficient oil-free air sealing device for the floating roof tank of claim 1, wherein one end of the secondary sealing assembly (20) is fixedly connected with the floating plate edge plate (40), and the other end of the secondary sealing assembly is attached to the inner side surface of the tank wall (50) of the tank and forms a sliding fit;

the oil-free air sealing assembly (30) further comprises a polymer oil gas tooth film (31), the polymer oil gas tooth film (31) is an annular hanging bag with an open upper part, the hanging bag is hung on the outer side of the spongy soft elastic object (32), the inner ring of the polymer oil gas tooth film (31) is fixedly connected with the floating disc edge plate (40), the bottom of the polymer oil gas tooth film (31) is located on the primary sealing assembly (10), the outer ring of the polymer oil gas tooth film (31) is attached to the inner side surface of the wall (50) of the storage tank, and the top of the outer ring is fixedly connected with a sliding fit part of the secondary sealing assembly (20) attached to the inner side surface of the wall (50) of the storage tank; the upper part of the spongy soft elastic substance (32) is jointed with the secondary sealing component (20).

3. An efficient oil-free air sealing device for a floating roof tank as claimed in claim 2, wherein the sliding fit part of the secondary sealing assembly (20) and the inner side surface of the tank wall (50) of the tank comprises a sliding block (21) and a supporting sealing assembly for supporting the sliding block (21); oil-free air seal subassembly (30) still include insulating extension board (33), insulating extension board (33) press from both sides to establish and be fixed in sliding block (21) with support between the seal assembly, just the outer lane top of polymer oil gas tooth membrane (31) presss from both sides to establish and is fixed in between insulating extension board (33) and sliding block (21).

4. The high-efficiency oil-free air sealing device for the floating roof storage tank is characterized in that the polymer oil-gas toothed film (31) is provided with a plurality of sawteeth (34) of the oil-free air sealing section at the joint of the inner side surface of the wall (50) of the storage tank, the sawteeth (34) of the oil-free air sealing section are provided with a plurality of channels from top to bottom, and the tooth crest of each sawteeth (34) of the oil-free air sealing section abuts against the inner side surface of the wall (50) of the storage tank.

5. The high-efficiency oil-free air sealing device for the floating roof storage tank is characterized in that the oil-free air sealing section sawtooth-shaped protrusion (34) is a section of polymer adhesive tape arranged on the polymer oil gas tooth film (31), one surface of the adhesive tape is a smooth surface, the other surface of the adhesive tape is provided with a tooth-shaped protrusion in the horizontal direction, the smooth surface is fixedly connected with the polymer oil gas tooth film (31), and the tooth-shaped protrusion is arranged towards the inner side surface of the tank wall (50) of the storage tank and is tightly attached to the tank wall (50) on the inner side of the storage tank in the use process.

6. The high-efficiency oil-free air sealing device for the floating roof tank as claimed in claim 4, wherein the serration (34) of the oil-free air sealing section is provided to have a length of a circumference of the polymer oil gas serration film (31) which surrounds one circumference in a circumferential direction of the inner side surface of the tank wall (50).

7. The high-efficiency oil-free air sealing device for the floating roof tank as claimed in claim 4, 5 or 6, wherein the primary sealing assembly (10) is a bladder-type elastic seal having a sealing band (11) disposed at an outer side thereof, the sealing band (11) is provided with a primary sealing section sawtooth-shaped protrusion (12) at a side attached to an inner side surface of the tank wall (50), the primary sealing section sawtooth-shaped protrusion (12) has the same structural form as the oil-free sealing section sawtooth-shaped protrusion (34), and the distribution width of the primary sealing section sawtooth-shaped protrusion (12) extends a set length from upper and lower ends of the sealing band (11) attached to the inner side surface of the tank wall (50) to one side of the floating plate edge plate (40).

8. The high-efficiency oil-free air sealing device for the floating roof storage tank is characterized in that the device further comprises an L-shaped pressing plate (15), wherein the vertical edge of the L-shaped pressing plate (15) is fixed on the upper portion of the outer side surface of the floating plate edge plate (40), the transverse edge of the L-shaped pressing plate (15) extends from one side of the floating plate edge plate (40) to one side of the tank wall (50), and the transverse edge is arranged at the bottom of the polymer oil gas tooth film (31) and is used for pressing the polymer oil gas tooth film (31) against the primary sealing assembly.

9. An efficient oil-free air sealing device for a floating roof tank as claimed in claim 7, wherein the lower end of the oil-free air sealing section serration (34) and the upper end of the primary sealing section serration (12) are not in contact with each other.

10. The high-efficiency oil-free air sealing device for the floating roof storage tank of claim 8, wherein the inner ring end of the polymer oil gas tooth membrane (31) is reversely wrapped from the outer side of the floating plate edge plate (40) to the inner side of the floating plate edge plate (40), i.e. the inner ring end of the polymer oil gas tooth membrane (31) comprises an inner ring end inner edge and an inner ring end outer edge which are respectively arranged at the inner side and the outer side of the floating plate edge plate (40);

the fixed end of the primary sealing assembly (10) is clamped between the outer edge of the end part of the inner ring and the outer side surface of the floating disc edge plate (40);

the fixed end of the secondary sealing component (20) is arranged on the inner side of the inner edge of the end part of the inner ring;

the edge plate bolt (42) sequentially penetrates through the fixed end of the secondary sealing assembly (20), the inner edge of the end part of the inner ring, the floating plate edge plate (40), the fixed end of the primary sealing assembly (10), the outer edge of the end part of the inner ring and the L-shaped pressing plate (15), and fastening nuts are arranged at two end parts of the edge plate bolt (42), so that the secondary sealing assembly (20), the primary sealing assembly (10), the polymer oil-gas tooth film (31) and the L-shaped pressing plate (15) are all fixed with the floating plate edge plate (40);

still overlap on edge plate bolt (42) and be equipped with polymer packing ring (35), polymer packing ring (35) press from both sides and locate between the fastening nut in floating plate edge plate (40) outside and L type clamp plate (15), the screw rod external diameter that the central through-hole internal diameter of polymer packing ring (35) is less than edge plate bolt (42).

Technical Field

The invention relates to the technical field of floating roof storage tank sealing, in particular to a high-efficiency oil-free air sealing device for a floating roof storage tank.

Background

At present, the sealing form of large storage tanks at home and abroad is basically a form of combination of primary and secondary sealing devices, although the combination form has the advantages of wide use, simple and convenient maintenance, long service life and the like, the large sealing cannot achieve the complete sealing degree, and the oil gas is accumulated in a closed space between the primary and secondary sealing devices to form an oil gas space due to the respiration in the floating roof operation process, the volatilization of the condensed oil on the tank wall and the like. The existing device in the form of primary and secondary sealing combination has large volume of a closed space, and can bring large potential safety hazards to a storage tank after the concentration of oil gas reaches a flash explosion point.

Disclosure of Invention

In order to solve the problem of reducing the volume of a closed space in the prior art, the invention provides a high-efficiency oil-free air sealing device for a floating roof storage tank.

In order to achieve the purpose, the invention adopts the following technical scheme:

a high-efficiency oil-free air sealing device for a floating roof storage tank comprises the following components:

the primary sealing assembly is fixedly arranged between the inner side surface of the tank wall of the storage tank and the outer side surface of the floating disc edge plate and is used for realizing the inner side sealing of the floating roof storage tank;

the secondary sealing assembly is arranged between the inner side surface of the tank wall of the storage tank and the outer side surface of the floating plate edge plate in a sliding manner, is higher than the primary sealing assembly in height and is used for realizing top sealing of the floating roof storage tank;

there is not oily airtight subassembly, this subassembly includes the soft bullet thing of spongy form, the soft bullet thing of spongy form fills the floating roof storage tank space between primary seal subassembly and secondary seal subassembly, and follows floating of floating plate edge board and reciprocate, realizes the sealing in floating roof storage tank space between primary seal subassembly and the secondary seal subassembly.

Preferably, one end of the secondary sealing assembly is fixedly connected with the edge plate of the floating disc, and the other end of the secondary sealing assembly is attached to the inner side surface of the wall of the storage tank and forms sliding fit;

the oil-free air-tight seal assembly further comprises a polymer oil-gas tooth film, the polymer oil-gas tooth film is an annular hanging bag with an open upper part, the hanging bag is hung on the outer side of the spongy soft elastic object, an inner ring of the polymer oil-gas tooth film is fixedly connected with the edge plate of the floating disc, the bottom of the polymer oil-gas tooth film is located on the primary seal assembly, an outer ring of the polymer oil-gas tooth film is attached to the inner side surface of the wall of the storage tank, and the top of the outer ring is fixedly connected with a sliding fit part, attached to the inner side surface of the wall of the storage tank, of the secondary seal; the upper part of the spongy soft elastic object is attached to the secondary sealing component.

Preferably, the sliding fit part of the secondary sealing assembly and the inner side surface of the wall of the storage tank comprises a sliding block and a supporting sealing assembly for supporting the sliding block; the oil-free air-tight seal assembly further comprises an insulating extension plate, the insulating extension plate is clamped and fixed on the sliding block and between the supporting and sealing assemblies, and the top of the outer ring of the polymer oil-gas tooth film is clamped and fixed between the insulating extension plate and the sliding block.

Further preferably, polymer oil gas tooth membrane is provided with no oily gas seal section serration in the laminating department of storage tank jar wall medial surface, no oily gas seal section serration top-down is provided with the multichannel, and each no oily gas seal section serration's addendum all supports and leans on storage tank jar wall medial surface.

Still further preferred, oil-free air sealing section sawtooth shape arch is set up one section polymer sticky tape on the polymer oil gas tooth membrane, the one side of sticky tape is the smooth surface, and the another side has the profile of tooth arch of horizontal direction, smooth surface and polymer oil gas tooth membrane fixed connection, the profile of tooth arch sets up towards storage tank jar wall medial surface and closely laminates with the inboard jar wall of storage tank in the use.

Further preferably, the length of the zigzag protrusion of the oil-free gas sealing section is equal to the circumference of the polymer oil gas tooth film which surrounds a circle in the circumferential direction of the inner side surface of the wall of the storage tank.

Preferably, the primary sealing assembly is a bladder-type elastic seal with a sealing band arranged on the outer side, the sealing band is provided with primary sealing section saw-toothed protrusions on one side attached to the inner side surface of the wall of the storage tank, the structural form of the primary sealing section saw-toothed protrusions is the same as that of the oil-free sealing section saw-toothed protrusions, and the distribution width of the primary sealing section saw-toothed protrusions extends to a set length from the upper end and the lower end, attached to the inner side surface of the wall of the storage tank, of the sealing band to one side of the edge plate of the floating plate respectively.

Preferably, the device still includes L type clamp plate, the perpendicular limit of L type clamp plate is fixed on floating plate edge board lateral surface upper portion, and the horizontal limit of L type clamp plate extends from a floating plate edge board side to storage tank jar wall one side, just the horizontal limit sets up in polymer oil gas tooth membrane bottom, and this horizontal limit is used for pressing the polymer oil gas tooth membrane on primary seal subassembly.

Further preferably, the lower ends of the oil-free sealing section serrations and the upper ends of the primary sealing section serrations are not in contact with each other.

Preferably, the end part of the inner ring of the polymer oil-gas tooth membrane is reversely wrapped from the outer side of the floating plate edge plate to the inner side of the floating plate edge plate, namely the end part of the inner ring of the polymer oil-gas tooth membrane comprises an inner ring end part inner edge and an inner ring end part outer edge which are respectively arranged on the inner side and the outer side of the floating plate edge plate;

the fixed end of the primary sealing assembly is clamped between the outer edge of the end part of the inner ring and the outer side surface of the edge plate of the floating disc;

the fixed end of the secondary sealing assembly is arranged on the inner side of the inner edge of the end part of the inner ring;

the edge plate bolt sequentially penetrates through the fixed end of the secondary sealing assembly, the inner edge of the end part of the inner ring, the floating disc edge plate, the fixed end of the primary sealing assembly, the outer edge of the end part of the inner ring and the L-shaped pressing plate, and the edge plate bolt is provided with fastening nuts at two end parts of the edge plate bolt, so that the secondary sealing assembly, the primary sealing assembly, the polymer oil-gas tooth film and the L-shaped pressing plate are fixed with the floating disc edge plate;

still overlap on the marginal plate bolt and be equipped with the polymer packing ring, the polymer packing ring presss from both sides and locates between the fastening nut in the floating plate marginal plate outside and the L type clamp plate, the central through-hole internal diameter of polymer packing ring is less than the screw rod external diameter of marginal plate bolt.

The invention has the beneficial effects that:

1. the oil-free air sealing device adopts the polymer oil gas tooth film to wrap the spongy soft elastic object which is arranged between the primary seal and the secondary seal, and the spongy soft elastic object can fill and occupy the space between the primary seal and the secondary seal as much as possible due to the material characteristics of the spongy soft elastic object, and according to statistics, the spongy soft elastic object can occupy more than 95% of the volume of the oil gas space between the primary seal and the secondary seal, so that the oil gas space between the primary seal and the secondary seal can be reduced by more than 95%. And because the oil-free air-tight seal component in the oil-free air-tight seal device can move up and down along with the floating of the floating plate edge plate, the safe operation of primary and secondary sealing cannot be influenced by the arrangement of the invention.

2. The spongy soft elastic substance is preferably polyurethane foam sponge, the polyurethane foam sponge has the characteristics of softness (low indentation hardness), high elasticity (good rebound resilience) and tearing resistance (high tearing strength), and the extrusion force on the wall of the storage tank and the secondary seal is small when the polyurethane foam sponge is extruded. The extrusion force on the wall of the storage tank is small, so that the friction force between the oil-free air sealing device and the wall of the storage tank is small when the floating pontoon moves up and down, and the influence of the oil-free air sealing device on secondary sealing can be effectively relieved and eliminated; the extrusion force for secondary sealing is small, so that the risk that the secondary sealing is separated from the tank wall due to extrusion is avoided. On the premise of not influencing the original safe operation of the primary seal and the secondary seal of the storage tank, the invention greatly reduces the oil-gas space between the primary seal and the secondary seal, ensures the safe operation of the storage tank and achieves the effects of energy conservation and environmental protection.

3. Because a narrow space is formed between the upper part of the secondary seal and the tank wall, the sponge soft elastic material cannot fill the narrow space, and therefore a certain oil-gas space can exist at the upper section of the secondary seal. The oil-free air sealing assembly is additionally provided with the insulating extension plate at the upper part of the secondary seal, the polymer oil gas tooth film is pushed to the wall of the storage tank, the oil gas space between the polymer oil gas tooth film at the top of the oil-free air sealing device and the wall of the storage tank is further reduced, and meanwhile, the insulating extension plate forms the oil-free insulating space between the sliding block at the upper part of the secondary seal and the wall of the storage tank, so that the point discharge phenomenon between the sliding block of the secondary seal and the wall of the storage tank is eliminated, and the storage tank can safely and effectively operate.

4. The zigzag bulge of the oil-free air sealing section arranged at the contact part of the polymer oil gas tooth film and the wall of the storage tank can effectively improve the sealing performance, which is equivalent to adding a double seal on the basis of one-time sealing. At present, domestic storage tanks have deformation conditions of different degrees, only depend on the sealing height of about 200mm between one-time sealing and the wall of the storage tank, the sealing effect is not good, and particularly when the wall of the storage tank has a concave-convex phenomenon, gaps are inevitably formed between one-time sealing and the wall of the tank, and the gaps are the main source of oil gas volatilization. The contact height of the oil-free air sealing device and the tank wall is high and is more than 3 times of that of one-time sealing, so that the sealing performance can be greatly improved, and oil gas volatilization can be prevented; and secondly, the arranged saw-toothed protrusions can effectively scrape the oil on the tank wall, and the siphon volatilization phenomenon of oil gas can be effectively prevented along the annular saw-toothed protrusions on the periphery of the tank wall, so that the volatilization of the oil gas is further reduced, and the requirement of environmental protection is met.

5. The polymer sealing washer is fixedly connected to the outer side of the floating plate edge plate. The inner diameter of the central through hole of the polymer washer is smaller than the outer diameter of the screw of the edge plate bolt, so that the polymer washer can effectively seal the thread of the edge plate bolt under the action of extrusion force when being arranged between the nut and the L-shaped pressing plate, and the path that air enters the closed space through the thread to form oil gas is blocked; meanwhile, the polymer oil gas tooth film is installed in a reverse wrapping mode, oil gas is prevented from leaking into a sealed cavity between the primary sealing assembly and the secondary sealing assembly from the bottom of the edge plate of the floating plate, an oil-gas-free environment in the sealed cavity is guaranteed, and potential safety hazards are eliminated.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of portion I of FIG. 1;

FIG. 3 is an enlarged view of section II of FIG. 1;

FIG. 4 is an enlarged view of the section III in FIG. 1, wherein one side of the insulating extension plate extends towards the inner side surface of the wall of the storage tank, and the polymer oil gas tooth film is pushed towards the inner side surface of the wall of the storage tank, so that oil gas gaps among a sliding block, an oil gas diaphragm and the inner side surface of the wall of the storage tank in the secondary sealing assembly are reduced;

FIG. 5 is an expanded schematic view of the polymer oil-gas tooth film of the present invention, wherein the upper row of holes are secondary sealing fastener through holes, the middle row of holes are holes for the polymer oil-gas tooth film to pass through on the outer side of the floating plate edge plate for the edge plate bolt, and the lower row of holes are holes for the polymer oil-gas tooth film reverse wrapping structure to be sleeved on the nut on the inner side of the floating plate edge plate; the hole diameters of all the holes are adjusted according to the sizes of the fasteners, the bolts of the edge plates and the nuts.

The notations in the figures have the following meanings:

10-primary seal assembly 11-sealing strip 12-dentate bulge 13-filler 14-batten

15-L type pressing plate

20-secondary sealing component 21-sliding block 22-oil gas diaphragm 23-elastic plate 24-L-shaped supporting plate

25-fastener 26-face mask 27-static conductive sheet 28-equipotential connecting device

30-oil-free air sealing component 31-polymer oil gas tooth film 32-spongy soft elastic object

33-insulating extension plate 34-oil-free air sealing section sawtooth-shaped bulge 35-polymer sealing gasket

40-floating plate edge plate 41-U-shaped pressing plate 42-edge plate bolt

50-tank wall

Detailed Description

The specific structure of the present invention will be further described with reference to the accompanying drawings.

It should be noted that, in the present embodiment, the direction from the tank wall 50 to the floating plate edge plate 40 is defined as the inward direction, and the direction from the floating plate edge plate 40 to the tank wall 50 is defined as the outward direction, so that the side of the tank wall 50 facing the floating plate edge plate 40 is the inner side of the tank wall, the side of the floating plate edge plate 40 facing the tank wall 50 is the outer side of the floating plate edge plate, and the side of the floating plate edge plate 40 facing away from the tank wall 50 is the inner side of the floating plate edge plate.

As shown in figure 1, the high-efficiency oil-free air sealing device for the floating roof storage tank comprises the following components

The primary sealing assembly 10 is fixedly arranged between the inner side surface of the tank wall 50 of the storage tank and the outer side surface of the floating plate edge plate 40 and is used for realizing the inner side sealing of the floating roof storage tank;

the secondary sealing assembly 20 is arranged between the inner side surface of the tank wall 50 of the storage tank and the outer side surface of the floating plate edge plate 40 in a sliding mode, is higher than the primary sealing assembly 10 in height and is used for realizing top sealing of the floating roof storage tank;

and the oil-free air sealing assembly 30 comprises a spongy soft elastic object 32, wherein the spongy soft elastic object 32 is filled in the floating roof tank space between the primary sealing assembly 10 and the secondary sealing assembly 20 and moves up and down along with the floating of the floating plate edge plate 40, so that the sealing of the floating roof tank space between the primary sealing assembly 10 and the secondary sealing assembly 20 is realized.

Since the primary seal assembly 10, the secondary seal assembly 20, and the oil-free gas seal assembly 30 are different in structure and function from each other, the three components will be described and explained in detail with reference to the drawings.

1. Primary seal assembly

As shown in fig. 1 and 3, the primary seal assembly 10 is an bladder-type elastic seal, and the primary seal assembly 10 is mainly composed of a sealing tape 11, a filler 13, a bead 14 and an L-shaped pressure plate 15. The filler 13 and the bead 14 are covered in a sealed space surrounded by the sealing band 11, that is, the sealing band 11 is arranged outside the primary sealing assembly 10.

As shown in fig. 1, the primary seal assembly 10 is generally rectangular in cross-section with its upper top surface configured to support a planar surface of the oil free gas seal assembly 30. Sealing band 11 is in the laminating one side of storage tank wall 50 medial surface is provided with primary seal section sawtooth shape arch 12, primary seal section sawtooth shape arch 12's structural style is the same with subsequent no oily seal section sawtooth shape arch 34, primary seal section sawtooth shape arch 12's distribution width from the upper and lower both ends that sealing band 11 and storage tank wall 50 medial surface laminated mutually extend one section respectively to floating plate edge plate 40 one side and set for length can, for example, should set for length and can set up to 50-100 mm.

As shown in fig. 1, the upper portion of the primary seal assembly 10 adjacent to the outer side of the floating plate edge plate 40 extends upward along the outer side of the floating plate edge plate 40 to form a fixed end of the primary seal assembly 10. As shown in fig. 3, the upper end of the bead 14 covered by the sealing tape 11 is fixed on the upper part of the outer side of the floating plate edge plate 40, and the other end of the bead 14 extends downwards along the outer side of the floating plate edge plate 40, so as to press the sealing tape 11 on the outer side of the floating plate edge plate 40; l type clamp plate 15 erect the limit and fix on 40 lateral surfaces upper portions of floating plate edge plate, L type clamp plate 15's horizontal limit extends to 50 medial surfaces of storage tank jar wall from the 40 lateral surfaces of floating plate edge plate, just horizontal limit sets up in the polymer oil gas tooth membrane 31 bottom that does not have oil gas seal subassembly 30, and this horizontal limit is used for pressing polymer oil gas tooth membrane (31) on a seal subassembly.

The outer edge of the end part of the inner ring, on which the polymer oil-gas tooth film 31 is fixed, is clamped between the vertical edge of the L-shaped pressing plate 15 and the upper end of the pressing bar 14.

2. Secondary seal assembly

As shown in fig. 1, the secondary sealing assembly 20 is disposed at the upper end of the floating plate edge plate 40, the lower end of the secondary sealing assembly 20 is provided with a fixed end fixedly connected with the floating plate edge plate 40, and the upper end is provided with a sliding end which is attached to the inner side surface of the tank wall 50 and forms a sliding fit.

As shown in fig. 3 and 4, the secondary sealing assembly 20 includes a sliding block 21, an oil-gas diaphragm 22, an elastic plate 23, an L-shaped supporting plate 24 and a fastener 25, the upper end of the elastic plate 23 is fixed between the oil-gas diaphragm 22 and the L-shaped supporting plate 24 by the fastener 25, a polymer oil-gas tooth film 31, an insulating extension plate 33, the oil-gas diaphragm 22 and the elastic plate 23 are sequentially fixed below the sliding block 21 by the L-shaped supporting plate from top to bottom, and the elastic plate 23 supports the sliding block 21 to be attached to and slide on the inner side surface of the tank wall 50; the lower end of the elastic plate 23 is fixed on the upper part of the inner side of the floating plate edge plate 40, and the oil-gas diaphragm 22 is attached to the inner surface of the elastic plate 23 from the upper end of the elastic plate 23 and extends to the lower end of the elastic plate 23 and is fixed on the upper part of the inner side of the floating plate edge plate 40.

As shown in fig. 4, in the present embodiment, a cover 26 is further included, which is installed outside the secondary seal assembly, and is used for preventing damage and contamination of the secondary seal due to rain, dust, oil condensate, etc., and has fixing and shaping functions on the sliding block 21; a static electricity conducting sheet 27 for conducting and removing secondary sealing static electricity and forming equipotential with the tank wall; and an equipotential connecting device 28 which is guided to the grounding lug welded on the floating plate from the upper part of the secondary sealing assembly through the tinned soft copper composite stranded wire, so that the secondary sealing has electrostatic conducting performance and forms equipotential with the floating roof.

3. Oil-free air sealing assembly

As shown in fig. 1 and 4, the oil-free air seal assembly 30 is composed of a polymer oil gas toothed film 31, a spongy soft elastic substance 32 and an insulating extension plate 33.

The polymer oil gas tooth film 31 is an annular hanging bag with an open upper part, the hanging bag is hung on the outer side of the spongy soft elastic object 32, the inner ring of the polymer oil gas tooth film 31 is fixedly connected with the floating disc edge plate 40, the bottom of the polymer oil gas tooth film 31 is located on the primary sealing assembly 10, the outer ring of the polymer oil gas tooth film 31 is attached to the inner side surface of the wall 50 of the storage tank, and the top of the outer ring is fixedly connected with the sliding fit part of the secondary sealing assembly 20 attached to the inner side surface of the wall 50 of the storage tank; the upper portion of the spongy mass 32 is fitted to the secondary seal assembly 20. The polymer oil gas tooth film 31 is made of polymer rubber synthetic material, and can be NBR/PVC rubber-plastic blended rubber material or FKM rubber material.

The spongy soft elastic material 32 is a polyurethane foam sponge which has the characteristics of softness (low indentation hardness), high elasticity (good resilience) and tearing resistance (high tearing strength), and has very small extrusion force on the wall of the storage tank and secondary sealing when being extruded.

The oil-free air seal assembly 30 further comprises an insulating extension plate 33, the insulating extension plate 33 is clamped between the sliding block 21 fixed on the secondary seal assembly and the supporting seal assembly, and the outer ring top of the polymer oil-gas tooth film 31 is clamped between the insulating extension plate 33 and the sliding block 21. The insulating extension plate 33 is made of an insulating polymer material.

As shown in fig. 1, 2 and 5, the polymer oil gas tooth film 31 is provided with the oil-free sealing section sawtooth protrusions 34 at the joint of the inner side surface of the storage tank wall 50, the oil-free sealing section sawtooth protrusions 34 are provided with a plurality of channels from top to bottom, and the tooth tops of each oil-free sealing section sawtooth protrusions 34 are abutted against the inner side surface of the storage tank wall 50.

Oil-free air sealing section sawtooth shape arch 34 can be processed on polymer oil gas tooth membrane 31 and form, in this embodiment, oil-free air sealing section sawtooth shape arch 34 is the setting one section polymer sticky tape on polymer oil gas tooth membrane 31, the one side of sticky tape is the smooth surface, and the another side has the profile of tooth arch of horizontal direction, smooth surface and polymer oil gas tooth membrane 31 fixed connection, the profile of tooth arch sets up and closely laminates with the inboard jar wall 50 of storage tank in the use towards the 50 medial surfaces of storage tank jar wall.

The length of the sawtooth-shaped protrusions 34 of the oil-free air sealing section is the circumference of the polymer oil gas tooth film 31 surrounding a circle in the circumferential direction of the inner side surface of the tank wall 50 of the storage tank, namely the overlapped part of the polymer oil gas tooth film 31 on the tank wall 50 on the inner side of the storage tank, which exceeds the circumference, is not arranged; the total height of the sawtooth-shaped bulges of the oil-free air sealing section arranged on the inner side surface of the wall of the storage tank is about 400mm, the tooth height is 1.5-2.0mm, and specific parameters can be set according to engineering conditions;

as shown in fig. 1, the lower ends of the oil-free sealing section serrations 34 and the upper ends of the primary sealing section serrations 12 do not contact each other.

As shown in fig. 1 and 4, the inner ring end of the polymer oil-gas tooth film 31 is reversely wrapped from the outer side of the floating plate edge plate 40 to the inner side of the floating plate edge plate 40, that is, the inner ring end of the polymer oil-gas tooth film 31 includes an inner ring end inner edge and an inner ring end outer edge which are respectively arranged on the inner side and the outer side of the floating plate edge plate 40;

the fixed end of the primary sealing component 10 is clamped between the outer edge of the end part of the inner ring and the outer side surface of the floating plate edge plate 40;

the fixed end of the secondary sealing component 20 is arranged at the inner side of the inner edge of the end part of the inner ring;

the edge plate bolt 42 sequentially penetrates through the fixed end of the secondary sealing assembly 20, the inner edge of the end part of the inner ring, the floating plate edge plate 40, the fixed end of the primary sealing assembly 10, the outer edge of the end part of the inner ring and the L-shaped pressing plate 15, and the edge plate bolt 42 is provided with fastening nuts at two end parts, so that the secondary sealing assembly 20, the primary sealing assembly 10, the polymer oil-gas tooth film 31 and the L-shaped pressing plate 15 are all fixed with the floating plate edge plate 40;

still the cover is equipped with polymer packing ring 35 on the edge plate bolt 42, and polymer packing ring 35 adopts the high wear-resisting high anti synthetic rubber material preparation of tearing, polymer packing ring 35 presss from both sides and locates between the fastening nut in the floating plate edge plate 40 outside and the L type clamp plate 15, the central through-hole internal diameter of polymer packing ring 35 slightly is less than the screw rod external diameter of edge plate bolt 42.

As shown in fig. 4, the edge plate bolt 42 is further sleeved with a U-shaped pressing plate 41, an opening of the U-shaped pressing plate 41 faces the inner side surface of the floating plate edge plate 40 and is pressed and arranged outside the elastic plate 23 by the edge plate bolt 42, and the U-shaped pressing plate 41 is higher than the nut so as to ensure that the U-shaped pressing plate 41 can press the inner edges of the elastic plate 23, the oil-gas diaphragm 22 and the inner ring end of the polymer oil-gas tooth film 31. Thus, the top of the inner ring of the polymer oil-gas gear film 31 is finally fixed on the floating plate edge plate 40 in a double mode.

The above is only a preferred embodiment of the invention, and is not intended to limit the invention; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.