JP4580109B2 - Tank / lorry pressurizer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tank lorry pressurizer mounted on, for example, a vehicle body of a tank lorry.
[0002]
[Prior art]
In general, when liquefied gas is transferred from a tank mounted on a tank lorry to a storage tank, the pressurized gas is sent into the tank via a tank lorry pressurizer to increase the pressure in the tank. The liquefied gas is pumped from the tank to the storage tank through a separate hose.
[0003]
The tank lorry pressurizer is mounted on the tank lorry vehicle body, connected to the tank lorry tank, vaporizes and pressurizes a part of the liquefied gas in the tank, and then pressurizes the pressurized gas. The structure which returns to the said tank is employ | adopted.
[0004]
This type is subject to vibration, impact, etc. during transportation, so that it absorbs them, and when passing liquefied gas, it is cooled by the pressurizer and undergoes heat shrinkage, so heat shrinkage is prevented. It is desirable for the structure to absorb.
[0005]
A conventional tank lorry pressurizer has a frame member fixed to the tank lorry, and a plurality of meandering pipes having fins are juxtaposed on the frame member, and each of the meandering pipes is provided. Are connected with the inlet header and the outlet header, and a plurality of shaft portions of each meandering tube including the connecting portion connecting each header and each meandering tube are axially covered with a Teflon sleeve. The shaft portion of each meandering tube including the connecting portion is fixed by a holder provided on the frame member.
[0006]
[Problems to be solved by the invention]
However, in the conventional configuration, there is a problem that the Teflon sleeve is rattled due to vibration during transportation, and the Teflon sleeve is damaged.
[0007]
Accordingly, an object of the present invention is to provide a tank / lorry pressurizer that can solve the above-described problems of the prior art and can sufficiently withstand vibration during transportation, impact, or thermal contraction when passing liquefied gas. It is to provide.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a tank lorry pressurizer mounted on a tank lorry and connected to the tank lorry to pressurize the liquefied gas in the tank. The frame member has a frame member fixed to a lorry, and the frame member has a plurality of meandering pipes having fins arranged in parallel, and each meandering pipe is connected by an inlet header and an outlet header. A sleeve is placed on the shaft portion of each meandering tube including the connecting portion connecting each meandering tube, and the shaft portion of each meandering tube including the connecting portion is provided on the frame member. The pair of bar members are fixed by being sandwiched , and each bar member is provided with a plurality of semicircular arc-shaped sleeve pressing grooves that are formed in consideration of the tightening allowance of the sleeve.
[0009]
According to the present invention, the pair of pressing members includes the sleeve pressing groove formed to allow for the tightening margin of the sleeve. Therefore, when the sleeve is fixed with the pair of pressing members, the sleeves are tightened with an appropriate torque. , It will not rattle and damage to the sleeve is prevented.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a tank lorry pressurizer according to the present invention will be described with reference to the accompanying drawings.
[0011]
1 is a plan view of a tank lorry pressurizer, FIG. 2 is a side view of the same, FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 1 to 4, reference numeral 1 denotes a tank lorry pressurizer, and the pressurizer 1 is fixed to a tank lorry chassis (not shown). The pressurizer 1 has a frame member 10 assembled in a box shape by an aluminum angle member. Inside the frame member 10, as shown in FIG. 2, seven meandering tubes 3 are provided. It is installed side by side. As shown in FIG. 2, this pipe 3 is provided with four straight straight pipes, and the ends of the straight pipes are welded together with U-shaped pipes, as shown in FIG. 3 and FIG. The center lines of the straight pipes are arranged in a staggered manner. Both end portions of the meandering tube 3 are connected to an inlet header 7 and an outlet header 9 via a connecting portion 11. The meandering tube 3 may be formed by bending a single tube in a meandering manner.
[0012]
As shown in FIG. 5, a single-letter aluminum fin 5 is attached to the outer periphery of the meandering tube 3.
[0013]
However, as shown in FIG. 2, portions (hereinafter simply referred to as shaft portions) 100 in which the fins 5 are not provided are formed in the shaft portion of the meandering tube 3. As will be described later, a flat bar 23 is provided, and the meandering tube 3 is fixed to the stay 10 a of the frame member 10 by the flat bar 23.
FIG. 6 shows the intermediate support plate 12 of the fin 5. The support plate 12 is provided with a plurality of grooves 12 a, and the fins 5 are held in these grooves 12 a.
[0014]
The inlet header 7 is connected to a supply port of a tank lorry tank (not shown) via an inlet flange 13, and the outlet header 9 is connected to a return port of a tank lorry tank (not shown) via an outlet flange 15. Connected.
[0015]
According to this, a part of the liquefied gas (gas transport is generally transported in the state of liquefied gas) loaded in the tank of the tank lorry is vaporized into the gas state through the pressurizer 1, It is returned to the tank / lorry tank under pressure. Then, the pressure in the tank rises, and the liquefied gas in the tank is transferred to the storage tank through a hose of another system at this pressure. At this time, the pressurizer 1 functions as an evaporator (vaporizer), and the meandering tube 3 is cooled and contracts.
[0016]
According to this embodiment, the seven meandering tubes 3 described above are fixed so as to be able to absorb vibration, impact, heat shrinkage, and the like.
[0017]
Specifically, a fluororesin sleeve 21 (FIG. 7) as a heat insulating material is attached to the connecting portion 11 (or the shaft portion 100) of the meandering tube 3, and this sleeve 21 is attached to a pair of bar members 23a. , 23b, and is fixed by fixing the flat bar 23 to the stay 10a of the frame member 10 using bolts (not shown). In FIG. 8, 22 is a hole through which the fixing bolt is passed, and 24 is a connecting plate for connecting the pair of bar members 23a and 23b. Referring to FIG. 7, the sleeve 21 is provided with a notch 21c so as to be easily attached to the connecting portion 11 (or the shaft portion 100) of the meandering tube 3, and the two portions 21a and 21b are pushed by the notch 21c as a boundary. Can be spread. The sleeve 21 includes a pair of flanges 21d and 21e, and the bar members 23a and 23b are fitted in a width W between the flanges 21d and 21e.
[0018]
According to this embodiment, since the tank / lorry heater 1 is made entirely of aluminum except for the sleeve 21 and the bolt (made of stainless steel), it can be sufficiently reduced in size and weight.
[0019]
As shown in FIG. 8, the flat bar 23 made of aluminum is composed of a pair of bar members 23a and 23b. As described above, these bar members 23a and 23b are bolted to the stay 10a of the frame member 10. Yes.
[0020]
As shown in FIG. 8a, a plurality of semicircular arc-shaped sleeve pressing grooves 51 are formed in the respective bar members 23a and 23b. As shown in FIG. 8 b, the sleeve pressing groove 51 is a point on the imaginary line L that protrudes outward from the side wall 52 of the bar member 23 a, 23 b by the tightening allowance G in anticipation of the tightening allowance G of the sleeve 21. It is formed along an arc that follows radius R, centered on O.
[0021]
For example, when the outer diameter of the sleeve 21 is 24 mm, the fastening allowance G is set to 0.5 mm, and the radius R is set to 12.5 mm.
[0022]
According to this, when the pair of bar members 23a and 23b are bolted to the stay 10a of the frame member 10 and these bar members 23a and 23b are connected to each other by the connecting plate 24, the fastening allowance G (= 0.. Since the sleeve 21 is fastened with the sleeve 21 compressed by 5 mm), the diameter of the sleeve pressing groove 51 is equal to the outer diameter (= 24 mm) of the sleeve 21.
[0023]
In the present embodiment, since the pair of bar members 23a and 23b includes the sleeve pressing groove 51 formed in consideration of the tightening allowance G of the sleeve 21, when the sleeve 21 is fixed by the pair of bar members 23a and 23b, The gap between the pair of bar members 23a and 23b disappears, and the sleeve 21 is tightened with an appropriate torque and is almost completely fixed. Therefore, the sleeve 21 does not rattle, and the sleeve 21 is prevented from being damaged.
[0024]
Further, since the slippery sleeve 21 is interposed between the flat bar 23 and the serpentine tube 3, even if the serpentine tube 3 contracts due to thermal contraction, the serpentine tube 3 itself is fixed. Since it can be freely contracted in the axial direction, no cracks occur in the welded portion between the headers 7 and 9 and the connecting portion 11, for example. Since the sleeve 21 is tightened with an appropriate torque, when the meandering tube 3 contracts due to thermal contraction, the sleeve 21 does not come off from the portion fixed by the flat bar 23. Furthermore, since the sleeve 21 has the notch 21c between the two portions 21a and 21b, the sleeve 21 can be easily attached to the meandering tube 3.
[0025]
As mentioned above, although this invention was demonstrated based on one Example, it is clear that this invention is not limited to this. For example, the sleeve 21 is not limited to being made of fluororesin as long as it is made of a slippery material. However, the resin-made thing excellent in a moldability is preferable. In consideration of the strength, the frame member 10 can be made of stainless steel.
[0026]
【The invention's effect】
According to the present invention, the pair of pressing members includes the sleeve pressing groove formed to allow for the tightening margin of the sleeve. Therefore, when the sleeve is fixed with the pair of pressing members, the sleeves are tightened with an appropriate torque. , It will not rattle and damage to the sleeve is prevented.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a tank lorry pressurizer according to the present invention.
FIG. 2 is a side view of FIG.
3 is a cross-sectional view taken along line AA in FIG.
4 is an arrow B view of FIG.
FIG. 5 is a view showing a fin shape.
FIG. 6 is a view showing an intermediate support plate of the fin.
7A is an end view of a sleeve, and b is a front view thereof. FIG.
8A is a plan view showing a pair of pressing members, and FIG. 8B is an enlarged view showing a sleeve pressing groove formed therein.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pressurizer 3 Serpentine-shaped pipe 7 Inlet header 9 Outlet header 10 Frame member 11 Connecting part 21 Sleeve 23 Flat bar 23a, 23b Bar member (pressing member)
51 Sleeve holding groove 100 Shaft

Claims (1)

In the tank lorry pressurizer that is mounted on the tank lorry, connected to the tank of this tank lorry and pressurizes the liquefied gas in this tank,
A frame member fixed to the tank lorry, and a plurality of meandering tubes having fins are juxtaposed in the frame member, and each meandering tube is connected by an inlet header and an outlet header, A sleeve is put on a shaft portion of each meandering tube including a connecting portion connecting each header and each meandering tube, and the shaft portion of each meandering tube including the connecting portion is attached to the frame from above the sleeve. A tank characterized in that a plurality of semicircular arc shaped sleeve pressing grooves are formed to allow for the tightening allowance of the sleeve, and are sandwiched and fixed by a pair of bar members provided on the member.・ Pressure device for lorries.

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