CN212390108U - Low-temperature storage tank - Google Patents

Abstract

The utility model provides a low temperature storage tank, this storage tank is including the inner tank that is used for storing the low temperature medium, the outer jar of this inner tank of parcel to and locate the bearing structure between inner tank and the outer jar, bearing structure includes: a first support pipe which is protrudingly provided at one axial end of the inner vessel; the second supporting pipe is arranged at the other end of the inner tank in the axial direction in a protruding mode and is connected with the inner wall of the outer tank; the middle part of the sliding part is provided with a through hole in a penetrating way; the sliding part is slidably sleeved on the first supporting pipe through the through hole; the pull belts are distributed around the circumference of the sliding part, one ends of the pull belts are fixedly connected with the sliding part, and the other ends of the pull belts are fixedly connected with the inner wall of the outer tank; the end part of the pull belt connected with the sliding part can move axially along with the sliding part relative to the inner tank. So, when the inner tank is cooled and shrunk, the drawstring can not move along with the shrinking direction of the inner tank to cause the drawstring to be excessively stretched and to be easily broken, and the stress of the drawstring in the cold state of the inner tank is improved.

Description

Low-temperature storage tank

Technical Field

The utility model relates to a storage tank technical field, in particular to low temperature storage tank.

Background

With the rapid development of the Chinese economy and the continuous progress of the low-temperature technology, the gas industry has rapidly developed. The application of freezing liquefied gases such as liquid oxygen, liquid nitrogen, liquid argon, liquid helium, liquid hydrogen, liquefied natural gas and the like is expanded from the industries such as machinery, petroleum, chemical engineering and the like to the fields such as energy, environmental protection, shipbuilding, traffic, biology, aerospace and the like, and the demand is rapidly increased year by year. Meanwhile, with the continuous increase of energy demands and the increasing enhancement of environmental protection consciousness of countries in the world, the popularization and application of clean energy such as liquid hydrogen, liquefied natural gas and the like become the development key points in the energy field of the current society.

As a storage container for frozen liquefied gas, GB/T18442 + 2019 fixed vacuum insulation cryogenic pressure container issued by the State market administration of supervision and administration/national standardization administration in 2019 stipulates the convenience of materials, design, manufacture, inspection and test, safety protection and the like of a frozen liquefied gas storage tank, wherein GB/T18442.3-2019 item 18.3 puts forward specific requirements on interlayer support.

The more common interlayer supporting structure of the vertical low-temperature storage tank is as follows: the upper drawstring support and the lower steel tube support. The drawstring support has the characteristics of low manufacturing cost, convenience in installation and the like under the condition of meeting the standard requirements. But also has partial defects, such as short heat bridge and easy heat transfer, and condensation of the outer tank in an area with high air humidity; when storing liquid, the inner tank shrinks axially in a cold state, and the joint of the drawstring and the tank body is subjected to larger thermal stress load. Therefore, the development of a new sandwich support form is necessary to improve the performance of the existing cryogenic storage tank.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low temperature storage tank to solve the too big problem of atress of intermediate layer bearing structure's stretching strap when inner tank cold state among the prior art.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a cryogenic storage tank comprising an inner tank for storing cryogenic medium, an outer tank encasing the inner tank, and a support structure disposed between the inner tank and the outer tank, the support structure comprising: a first support pipe protruding from one axial end of the inner vessel; the second supporting pipe is arranged at the other end of the inner tank in the axial direction in a protruding mode and is connected with the inner wall of the outer tank; the middle part of the sliding part is provided with a through hole in a penetrating way; the sliding part is slidably sleeved on the first supporting pipe through the through hole; the pull belts are distributed around the circumferential direction of the sliding part, one ends of the pull belts are fixedly connected with the sliding part, and the other ends of the pull belts are fixedly connected with the inner wall of the outer tank; the end part of the pull belt connected with the sliding part can move axially relative to the inner tank along with the sliding part.

According to the utility model discloses an embodiment, first supporting tube is located the center department of a head of inner tank, first supporting tube with the inner tank is coaxial.

According to an embodiment of the present invention, the end socket of the inner tank does not exceed the cylinder of the outer tank in the axial direction of the outer tank; the sliding part is in be close to this head when the inner tank is not contract, just the stretching strap is kept away from the one end of sliding part with the inner wall connection of the barrel of outer jar is fixed.

According to an embodiment of the present invention, the sliding portion abuts against the head of the inner tank when the inner tank is not contracted.

According to an embodiment of the invention, the drawstring is perpendicular to the axis of the inner tank.

According to an embodiment of the present invention, the sliding portion is shaped as a flat plate; the drawstring is fixed on the sliding part in a lap joint manner.

According to an embodiment of the present invention, the draw tape is attached to the surface of the sliding portion.

According to an embodiment of the present invention, the support structure further comprises an inner stiffening plate; the inner reinforcing plate is arranged inside the inner tank and is opposite to the inside and the outside of the first supporting pipe; the inner reinforcing plate is provided with an arc-shaped outline which is adapted to the inner tank and is attached to the inner wall of the inner tank.

According to an embodiment of the present invention, the second support tube has a plurality; a plurality of the second support tubes are circumferentially spaced about the axis of the inner vessel.

According to an embodiment of the present invention, the second support pipe is arranged along an axial extension of the inner vessel;

one end of the second supporting pipe is attached to the outer wall of the cylinder body of the inner tank, and the other end of the second supporting pipe is fixedly connected with the end enclosure of the outer tank.

According to the above technical scheme, the utility model provides a pair of low temperature storage tank has following advantage and positive effect at least:

the first supporting pipe and the plurality of pull belts are arranged at one axial end of the inner tank, and the second supporting pipe is arranged at the other axial end of the inner tank, so that the support is formed between the two axial ends of the inner tank and the outer tank, and the stability of the support is ensured; wherein, can maintain the steady state of jar body in horizontal transportation or when vertical installation through a plurality of stretching straps that distribute around first support tube circumference. Meanwhile, one end of the drawstring is fixedly connected with the inner wall of the outer tank, and the other end of the drawstring is connected with the sliding part and can slide on the first supporting pipe along with the sliding part. So, when inner tank receives the cold shrink, the tip that stretching strap and sliding part are connected can produce on first stay tube and slide, and can not remove along with the shrink direction of inner tank together and lead to the stretching strap overstretch and collapse absolutely easily, has improved the atress of stretching strap under the inner tank cold state, has prolonged life, guarantees that the low temperature jar body is in normal operating condition.

Drawings

Fig. 1 is a schematic structural view of the embodiment of the present invention in which the low temperature storage tank is vertically placed.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a schematic view illustrating the connection between the sliding part and the first supporting tube when the inner tank is in a stable state according to the embodiment of the present invention.

Fig. 4 is a schematic view illustrating the connection between the sliding part and the first supporting tube when the inner vessel is contracted according to the embodiment of the present invention.

The reference numerals are explained below:

1-inner tank, 11-inner cylinder, 12-inner top end enclosure, 13-inner bottom end enclosure;

2-outer tank, 21-outer cylinder, 22-outer top end enclosure and 23-outer bottom end enclosure;

3-support structure, 31-first support tube, 32-second support tube, 33-sliding part, 34-pulling belt, 341-support sliding end, 342-support fixed end, 36-inner reinforcing plate and 37-outer backing plate.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

This embodiment provides a low temperature storage tank, sets up intermediate layer bearing structure between the axial both ends of inner tank and outer jar, can guarantee effectively to support and can avoid producing the difference in temperature stress between the inner and outer jar again to improve low temperature storage tank's wholeness ability.

Referring to fig. 1, fig. 1 shows a specific structure of a cryogenic storage tank provided in this embodiment, which includes an inner tank 1 for storing cryogenic media, an outer tank 2 wrapping the inner tank 1, and a support structure 3 disposed between the inner tank 1 and the outer tank 2. The support structure 3 includes a first support pipe 31 and a second support pipe 32 respectively provided at both ends of the inner vessel 1 in the axial direction, a sliding portion 33 slidably fitted over the first support pipe 31, and a plurality of drawstrings 34 connected between the sliding portion 33 and the outer vessel 2.

In this embodiment, the cryogenic tank is a vertical tank. Referring to the view direction of fig. 1, the inner tank 1 has an inner cylinder 11, and an inner top head 12 and an inner bottom head 13 respectively sealed at both ends of the inner cylinder 11 in the axial direction, and the outer tank 2 has an outer cylinder 21, and an outer top head 22 and an outer bottom head 23 respectively sealed at both ends of the outer cylinder 21 in the axial direction.

The first support pipe 31 is only one, is protruded on the inner top end enclosure 12 of the inner tank 1, and is vertically arranged along the axial direction of the inner tank 1.

Preferably, first support tube 31 is located this interior top head 12's center department, and first support tube 31 is unanimous with the central axis of inner tank 1, and both are coaxial setting, are favorable to first support tube 31 atress even.

A through hole is formed through the middle of the sliding portion 33. The sliding portion 33 is slidably fitted over the first support pipe 31 through the through hole.

Referring to fig. 2, the drawstrings 34 are provided in plurality, and the drawstrings 34 are circumferentially spaced around the sliding portion 33. One end of each pull band 34 is connected and fixed to the sliding portion 33, and the other end is connected and fixed to the inner wall of the outer tank 2. Corresponding to the pulling belt 34 supported between the inner tank 1 and the outer tank 2, so that the inner tank 1 is in a relatively stable state, and the inner tank 1 is prevented from being displaced and twisted relative to the outer tank 2.

In the present embodiment, the end of the draw tape 34 connected to the slider 33 can move axially with the slider 33 with respect to the inner vessel 1, which can be regarded as the support slider end 341 of the draw tape 34; on the other hand, the other end of the pull belt 34 connected to the outer tank 2 is a support fixing end 342.

Referring to fig. 3 and 4, the supporting sliding end 341 is used to allow the pull belt 34 to slide when the inner tank 1 is subjected to low temperature shrinkage, so as to relieve the shearing force applied to the pull belt 34 when the inner tank 1 and the outer tank 2 are subjected to relative axial displacement due to temperature difference stress, avoid the problems of deformation and fracture of the pull belt 34 caused by excessive stretching, and improve the stress state of the pull belt 34.

Specifically, as shown in fig. 4, when the inner tank 1 is cooled and shrunk, two axial ends of the inner tank 1 are shrunk relatively, and the axial distance between the two ends and the outer tank 2 is increased. The first support pipe 31 moves downward with the contraction of the inner vessel 1. The fixed end 342 of the pull belt 34 is fixed, the sliding end 341 and the first support tube 31 which moves downwards slide relatively, and cannot move downwards along with the first support tube 31, namely, the sliding end 341 is fixed relative to the first support tube 31, the pull belt 34 cannot be obliquely elongated, the pull belt 34 is prevented from being subjected to a large vertical shearing force in an elongated state, the stress of the pull belt 34 in the cold state of the inner tank 1 is improved, and the service life of the pull belt 34 is prolonged. Also, the support sliding end 341 prevents the inner vessel 1 from being pulled by the pull tape 34 when it is contracted.

In the present embodiment, the sliding portion 33 has a flat plate shape, and the pull tape 34 is fixed to the sliding portion 33 in a lap joint manner so as to be supported by the sliding portion 33.

Specifically, the sliding portion 33 is a circular plate with a through hole in the middle; the draw tape 34 is attached to the upper surface of the slider 33 and arranged in the radial direction of the slider 33. The contact area between the pull belt 34 and the sliding part 33 is large, and the connection stability of the pull belt and the sliding part is improved.

An included angle is formed between the pull belt 34 and the axis of the inner tank 1, and the included angle can be adjusted according to specific working conditions.

In this embodiment, the inner top end enclosure 12 of the inner tank 1 does not exceed the upper end of the outer cylinder 21 of the outer tank 2 in the axial direction of the outer tank 2, and the purpose of the inner top end enclosure 12 is to leave a large space, so that the pull belt 34 connected to the inner top end enclosure 12 of the inner tank 1 can extend out by a sufficient length, and different included angles can be selected, so that the support fixed end 342 of the pull belt 34 is connected to the outer cylinder 21 of the outer tank 2 or the inner top end enclosure 12 of the outer tank 2.

Further, the sliding part 33 is close to the inner top end cap 12 of the inner vessel 1 when the inner vessel 1 is not contracted, and the pull tape 34 is attached to the inner wall of the outer cylinder 21 of the outer vessel 2 away from the supporting fixed end 342 of the sliding part 33.

Preferably, as shown in fig. 3, the sliding portion 33 abuts against the inner top end enclosure 12 of the inner tank 1 when the inner tank 1 is not contracted, and the pull belt 34 is horizontally disposed and connected to the outer cylinder 21 of the outer tank 2 at an angle of 90 degrees with respect to an axis perpendicular to the inner tank 1.

At this time, the length of the drawstring 34 can be similar to the radius length of the outer tank 2, and because the length is larger than that of the traditional drawstring, the thermal bridge is longer, thereby greatly reducing the heat leakage and being beneficial to the storage of the low-temperature medium.

Of course, the inner top end cap 12 of the inner tank 1 may also axially extend beyond the upper end of the outer cylinder 21 of the outer tank 2, and the sliding portion 33 is located on the first supporting tube 31 at an end away from the inner top end cap 12 of the inner tank 1 when the inner tank 1 is not contracted, so that the pulling strap 34 can be fixedly connected to the sidewall of the outer top end cap 22 of the outer tank 2. The included angle may be a right angle or an obtuse angle, and if the included angle is an obtuse angle, the pull strap 34 is disposed obliquely upward, so that the pull strap 34 has the advantages of being longer in length and reducing heat leakage.

In this embodiment, the support structure 3 further comprises an inner stiffening plate 36 and an outer backing plate 37 arranged in correspondence with the first support tube 31.

The outer gasket 37 is provided on the outer wall of the inner top head 12 of the inner vessel 1 corresponding to the first support pipe 31.

The outer gasket 37 has an arc-shaped profile adapted to the inner vessel 1 to be fitted on the outer wall of the inner vessel 1. The first supporting tube 31 is fixed on the outer backing plate 37 by welding to realize the connection and fixation with the inner tank 1.

The inner reinforcing plate 36 is provided on the inner wall of the inner top head 12 of the inner vessel 1 corresponding to the first support tube 31.

The inner reinforcing plate 36 has an arc-shaped profile adapted to the inner vessel 1 to be fitted on the inner wall of the inner vessel 1 to reinforce the inner top head 12.

Referring back to fig. 1 again, the second support tube 32 is protruded from the inner bottom end enclosure 13 of the inner tank 1 and connected to the inner wall of the outer tank 2.

The second support pipe 32 has a plurality. A plurality of second support pipes 32 are circumferentially spaced around the axis of the inner vessel 1 to provide sufficient support strength to ensure that the inner vessel 1 is stable in vertical placement.

Preferably, the second support pipe 32 is provided extending in the axial direction of the inner vessel 1. One end of the second support tube 32 is attached to the outer wall of the inner cylinder 11 of the inner tank 1, and the other end is fixedly connected with the outer bottom end socket 23 of the outer tank 2.

Above-mentioned second stay tube 32 laminates in the arrangement of the interior barrel 11 of inner tank 1, compares in traditional stay tube of locating between the relative head of inner and outer jar, and the length of second stay tube 32 is longer, has not only guaranteed effectual support length, has still increased the heat bridge, has reduced the heat leakage quantity of storage tank.

When the low-temperature storage tank is transported in an empty tank, the pull belt 34 at the top of the inner tank 1 and the plurality of second support pipes 32 at the bottom of the inner tank 1 bear the inertia load of the inner tank 1 together, so that the displacement between the inner tank 1 and the outer tank 2 can be avoided as much as possible.

Under normal working conditions, the low-temperature tank body is used in a vertical state. Inner tank 1 is because the cold state shrink, and the tip that stretching strap 34 and sliding part 33 link to each other can be along with sliding part 33 for inner tank 1 axial displacement, alleviates the shearing force that receives when stretching strap 34 takes place the ascending relative displacement of axial because of the temperature difference stress at inner tank 1 and outer jar 2, avoids stretching strap 34 to receive too big stress, improves stretching strap 34's stress state. When the low-temperature medium of the inner tank 1 is in a stable state, the plurality of circumferentially distributed pull belts 34 can ensure the stability of the inner tank 1 under a horizontal load. Moreover, because the length of the drawstring 34 is larger than that of the traditional drawstring 34, the heat leakage quantity can be greatly reduced, and the low-temperature medium is favorably stored.

To sum up, the utility model provides a pair of low temperature storage tank has following advantage and positive effect at least:

first, by providing the first support pipe 31 and the second support pipe 32 between the inner vessel 1 and the outer vessel 2 on both axial ends thereof, respectively, the stability of the support is ensured. Wherein, first support tube 31 is located the center department of this interior top head 12, and first support tube 31 is unanimous with the central axis of inner tank 1, and both are coaxial setting, are favorable to first support tube 31 atress even. The second support pipe 32 has a plurality. A plurality of second support pipes 32 are circumferentially spaced around the axis of the inner vessel 1 to provide sufficient support strength to ensure that the inner vessel 1 is stable in vertical placement.

Secondly, the stress of the drawstring 34 in the cold state of the inner tank 1 is improved. Specifically, one end of the pulling strip 34 is connected and fixed to the inner wall of the outer tank 2, and the other end is connected to the sliding portion 33 and can slide on the first support pipe 31 along with the sliding portion 33. So, when inner tank 1 receives cold shrink, the tip that stretching strap 34 and sliding part 33 are connected can produce on first supporting tube 31 and slide, and can not remove along with inner tank 1's shrink direction together, has avoided stretching strap 34 to receive great vertical shearing force in the state of lengthening, has improved stretching strap 34 at the atress under inner tank 1 cold state, has prolonged stretching strap 34's life, guarantees that the low temperature jar body is in normal operating condition.

Then, the inner top head 12 of the inner vessel 1 does not exceed the upper end of the outer cylinder 21 of the outer vessel 2 in the axial direction of the outer vessel 2, in order to leave a space so that the pulling tape 34 connected to the inner top head 12 of the inner vessel 1 can extend by a sufficient length. The sliding part 33 abuts against the inner top end closure 12 of the inner tank 1 when the inner tank 1 is not contracted, and the pull belt 34 is horizontally arranged and connected to the outer cylinder 21 of the outer tank 2. At this time, the length of the drawstring 34 can be similar to the radius length of the outer tank 2, and because the length is larger than that of the traditional drawstring 34, the thermal bridge is longer, thereby greatly reducing the heat leakage and being beneficial to the storage of the low-temperature medium.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. The utility model provides a low temperature storage tank, this storage tank includes the outer jar that is used for storing the inner tank of cryogenic medium, parcel this inner tank, and locates bearing structure between inner tank and the outer jar, its characterized in that, bearing structure includes:

a first support pipe protruding from one axial end of the inner vessel;

the second supporting pipe is arranged at the other end of the inner tank in the axial direction in a protruding mode and is connected with the inner wall of the outer tank;

the middle part of the sliding part is provided with a through hole in a penetrating way; the sliding part is slidably sleeved on the first supporting pipe through the through hole;

the pull belts are distributed around the circumferential direction of the sliding part, one ends of the pull belts are fixedly connected with the sliding part, and the other ends of the pull belts are fixedly connected with the inner wall of the outer tank; the end part of the pull belt connected with the sliding part can move axially relative to the inner tank along with the sliding part.

2. The cryogenic tank of claim 1, wherein:

the first supporting pipe is located at the center of an end socket of the inner tank, and the first supporting pipe is coaxial with the inner tank.

3. The cryogenic tank of claim 2, wherein:

the end socket of the inner tank does not exceed the cylinder body of the outer tank along the axial direction of the outer tank;

the sliding part is in be close to this head when the inner tank is not contract, just the stretching strap is kept away from the one end of sliding part with the inner wall connection of the barrel of outer jar is fixed.

4. The cryogenic tank of claim 3, wherein:

the sliding part abuts against the end socket of the inner tank when the inner tank is not contracted.

5. The cryogenic tank of claim 3, wherein:

the drawstring is perpendicular to the axis of the inner tank.

6. The cryogenic tank of any one of claims 1 to 5, wherein:

the sliding part is in a flat plate shape;

the drawstring is fixed on the sliding part in a lap joint manner.

7. The cryogenic tank of claim 6, wherein:

the drawstring is attached to the surface of the sliding part.

8. The cryogenic tank of claim 1, wherein:

the support structure further comprises an inner stiffening plate;

the inner reinforcing plate is arranged inside the inner tank and is opposite to the inside and the outside of the first supporting pipe; the inner reinforcing plate is provided with an arc-shaped outline which is adapted to the inner tank and is attached to the inner wall of the inner tank.

9. The cryogenic tank of claim 1, wherein:

the second supporting tube is provided with a plurality of supporting tubes;

a plurality of the second support tubes are circumferentially spaced about the axis of the inner vessel.

10. The cryogenic tank of claim 9, wherein:

the second supporting pipe extends along the axial direction of the inner tank;

one end of the second supporting pipe is attached to the outer wall of the cylinder body of the inner tank, and the other end of the second supporting pipe is fixedly connected with the end enclosure of the outer tank.

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