JP4220092B2 - Tanker truck - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tank truck over the transfer by loading a serving hazardous material liquid tank chamber of the tank.
[0002]
[Prior art]
This type of conventional tank lorry, like a general tank lorry, consists of a straight cylindrical body, and loads and transports dangerous liquids, so the interior is partitioned into multiple tank chambers by partition plates. In addition, a bottom valve is provided on the bottom surface of each tank chamber for unloading the liquid in each tank chamber, and this is connected to a discharge pipe disposed at the bottom of the tank. The tank is slightly lower on the front side in the advancing direction, that is, the entire tank is attached slightly forward and downward, so that the discharge pipe is also arranged forward and downward along the bottom of the tank. The tank is once sent to the front of the tank, sent from the front position to the rear part of the tank lorry or the left and right side parts of the lorry, and the liquid is taken out from the position.
[0003]
As described above, since the liquids in the plurality of tank chambers need to be once collected at the front position and sent to the rear side or the left and right sides from the front position, the total extension length of the discharge pipe is very long. Various liquids including various oils are loaded and transported in the tank of such a tank lorry, that is, in each tank chamber. When the viscosity of the loaded liquid increases, each tank chamber is unloaded at the time of unloading. In addition, a large amount of residual liquid is generated in the discharge pipe having a long length. Therefore, conventionally, it has been considered that a high viscosity liquid is difficult to load and transport with a tank lorry at the same temperature. Even in the case of a low- viscosity liquid, if the total length of the discharge pipe is long as in the conventional case, a residual liquid is generated in the tank chamber or the discharge pipe, and it is possible to completely discharge the residual liquid. It took time.
[0004]
[Problems to be solved by the invention]
Therefore, it has been conventionally practiced to reduce the viscosity of a high viscosity liquid by raising the liquid temperature, thereby suppressing the generation of residual liquid at the time of unloading as much as possible, and enabling loading and transportation with a tank lorry. However, when such a method is adopted and the temperature of the high-viscosity liquid is increased and the temperature is raised for transportation, there are many things that are first altered or deteriorated, and there are incidental facilities that maintain high temperatures for tanks and discharge pipes of tank trucks. In addition, it was very expensive, such as loading and unloading into a tank lorry and high temperature resistant equipment on the unloading side.
[0005]
The present invention has been made in view of the circumstances described above, the present invention to solve the conventional problems, by lowering tilting the front and rear bottom toward the center of the tank, the central liquid chamber tank A tank lorry that can suppress the generation of residual liquid at the time of unloading as much as possible and collect the tank lorry at low cost by collecting the liquid at the center and discharging the liquid from the side or rear part from this central position. The purpose is to do.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is a tank lorry for loading and transporting a liquid as a dangerous substance in the tank chamber of the tank 1, and the tanks 1 are arranged independently of each other adjacent to each other in the longitudinal direction. An inclined bottom surface which is formed by a plurality of tank members 2 having tank chambers 3 and in which the bottom surface 9 of each tank chamber 3 of each tank member 2 is inclined downward from both ends in the arrangement direction of each tank member 2 toward the central portion. The ring-shaped joining plates 4 and 4 are fixed to each other so as to cover the opposing ends 2b and 2b of the tank members 2 and 2, respectively, and the opposing edges 4b of the connecting plates 4 and 4 are fixed. , 4b are fixed to each other so that both tank members 2, 2 are joined to each other in the longitudinal direction, and a bottom valve 10 is provided at the lowest portion of the inclined bottom surface 9.
[0007]
The invention according to claim 2 is characterized in that in the tank lorry according to claim 1, a fluororesin film layer 12 is formed on the inner wall of the tank chamber 3 of each tank member 2.
[0008]
The invention according to claim 3 is characterized in that, in the tank lorry according to claim 1 or 2, a reinforcing frame such as a protective frame 6 or a side frame 5 is attached to each tank member 2.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a side view showing the entire tank lorry according to the present invention. This tank lorry is used for carrying a dangerous liquid in the tank chamber of the tank 1 and transporting it. The tanks 1 are arranged adjacent to each other in the longitudinal direction independently of each other and each tank chamber 3 (see FIG. 2). The two tank members 2 and 2 are joined to each other in the longitudinal direction via annular joint plates 4 and 4 attached to opposite ends. In addition, reinforcing frames such as a side frame 5, a protective frame 6, and a subframe 7 are attached to each tank member 2.
[0010]
As shown in FIG. 1, the two tank members 2, 2 forming the tank 1 are arranged on the same horizontal straight line on the upper surface 8 side, but the bottom surface 9 of each tank chamber 3 has two tank members 2, 2. 2 are formed on inclined bottom surfaces that are inclined downward from both ends in the arrangement direction toward the center, and a discharge port 18 is provided at the lowest portion of each inclined bottom surface 9. A bottom valve 10 is provided, and a discharge pipe 11 is connected to the bottom valve 10 of each tank chamber 3.
[0011]
According to such a tank lorry, the liquid in the tank chamber 3 of each tank member 2 is collected on the center part side (lowest part part side) in the longitudinal direction and width direction of the tank 1, and each bottom valve provided on this center part side 10, the discharge pump 11 (not shown) can be formed as short as possible through the discharge pipe 11, so that residual liquid is generated in the discharge pipe 11 and each tank chamber 3. There is almost nothing to do. The total length of the discharge pipe 11 is greatly reduced to about 1/4 to 1/5 of the conventional tank lorry of this type.
[0012]
Then, the high-viscosity liquid is loaded and transported in each tank chamber 3 of the tank 1 of such a tank truck, and when unloading, the high-viscosity liquid in each tank chamber 3 is in the longitudinal direction of the tank 1 and orthogonal thereto. Smoothly flows down along the inclined low surface 9 of each tank chamber 3 that inclines downward from the width direction to the center, and is discharged from the bottom valve 10 provided at the lowest position of the inclined bottom surface 9 and then discharged. It is unloaded smoothly via the pipe 11. Therefore, according to this tanker for high viscosity liquid, even if the liquid loaded in the tank 1 is high in viscosity, the inside of each tank chamber 3 of the tank 1, particularly near the bottom surface 9 or in the discharge pipe 11 when unloading. In other words, it is unloaded smoothly and unloaded smoothly, and the generation of residual liquid is suppressed.
[0013]
FIG. 2 shows two substantially frustoconical tank members 2, 2 formed independently of each other. Each tank member 2 includes a truncated cone-shaped body portion 2a, a large-diameter side end plate portion 2b, and a small-diameter side end plate portion 2c. A fluororesin film layer 12 is formed on the inner wall of the tank chamber 3. . Further, a manhole 13 and an injection port 14 are provided on the upper surface 8 diameter large portion side of each tank member 2, and a discharge port 18 in which the bottom valve 10 is provided as described above is provided on the bottom 9 diameter large portion side. .
[0014]
In FIG. 3, the joint plate 4 is attached to each of the two tank members 2 and 2 formed independently of each other as described above, and the side frame mounting seat 15, the protective frame mounting seat 16, and the subframe mounting seat 17 are attached. Shows a state where is attached. The joint plate 4 is formed in a ring shape, and is fitted on the large-diameter side end of each tank member 2, and its one end 4 a is welded to the tank member 2. The other end portions 4b and 4b of the joint plates 4 and 4 are butt welded at the time of joining of the two.
[0015]
That is, the two tank members 2 and 2 have opposite end portions 2b and 2b formed in a bowl shape or a flat hemispherical shape, so that it is difficult to join them together.
[0016]
Therefore, in the present embodiment, the ring-shaped (annular) joint plate 4 shown in the figure is separately manufactured, and this ring-shaped joint plate 4 is attached to the two tank members 2 and 2 with the respective bowl-shaped end portions 2b and 2b. And the other end portions 4b and 4b, which are the opposite end edges of the joint plates 4 and 4, as described above, are welded to each other. Even if the opposite end portions 2b, 2b of the tank members 2, 2 have a bowl shape, they can be accurately and firmly connected. In particular, the bottom portions 9, 9 of both tank members 2, 2 are opposite to each other. , 2b, which is useful when the opposing ends 2b, 2b are difficult to weld further.
[0017]
The ring-shaped joint plate 4 is not necessarily formed into a completely endless ring shape. For example, a portion that is not visible from the outside on the bottom side of the tank members 2 and 2 is a notched ring shape. Alternatively, a so-called half-ring shape may be abutted in a ring shape.
[0018]
A method for manufacturing a tank lorry having the above-described configuration will be described with reference to FIGS. 4A to 4C are process diagrams of the tank lorry manufacturing method, and FIGS. 5A to 5C are views of the tank member 2 for each of FIGS. 4A to 4C. It is the end view seen from the small diameter side end plate part 2c.
[0019]
In manufacturing the tank lorry, first, for example, two tank members 2 and 2 as already described with reference to FIGS. 2 and 3 are formed independently and separately. And the fluororesin membrane | film | coat layer 12 is formed in the inner wall whole region of the tank chamber 3 of each tank member 2 by the biaxial rotational molding method (other methods may be mentioned later). As shown in FIG. 3, the joint plate 4, the side frame mounting seat 15, the protective frame mounting seat 16, the subframe mounting seat 17 and the like are attached to each tank member 2 by welding. The resin film layer 12 may be formed before the joining plate 4, the mounting seats 15, 16, 17 and the like are attached to the tank member 2. However, when welding is performed, the welding heat is applied to the tank inner wall. If this may propagate and adversely affect the fluororesin film layer 12 such as thermal decomposition, the fluororesin film layer 12 is formed after the joint plate 4 or the like is attached to the tank members 2 and 2. Is preferred.
[0020]
After the fluororesin film layer 12 is formed on the inner wall of the tank chamber 3 of each tank member 2, both the tank members 2, 2 are connected to the large-diameter side end plate portion as shown in FIGS. 4A and 5A. 4b, the opposite end portions 4b and 4b of the link-like joint plates 4 and 4 are butt welded to each other so that the tank members 2 and 2 are integrally joined to each other in the longitudinal direction. (B) and the state shown in FIG. A welded joint portion of the opposite end portions 4b, 4b of the joint plates 4, 4 is indicated by W in the figure. In this state, both tank members 2 and 2 are arranged on the same horizontal straight line on the upper surface 8 side, and the bottom surfaces 9 and 9 of the two tank chambers 3 and 3 are arranged in the direction in which both tank members 2 and 2 are arranged. Each is formed on an inclined bottom surface that is inclined downward from both ends toward the center. When the tank members 2 and 2 are joined by the joint plates 4 and 4, the protective frame mounting seat 16 and the subframe mounting seat 17 of one tank member 2 and the protective frame of the other tank member 2 are used. The mounting seat 16 and the subframe mounting seat 17 are joined by welding.
[0021]
After the two tank members 2 and 2 are joined to each other in the longitudinal direction as described above, as shown in FIGS. 4A and 5A, the side frames of both tank members 2 and 2 are used. The side frame 5, the protective frame 6 and the subframe 7 are respectively attached to the mounting seat 15, the protective frame mounting seat 16 and the subframe mounting seat 17 so as to extend over the tank members 2, respectively. C). By attaching reinforcing frames such as the side frame 5, the protective frame 6, and the sub frame 7 over the tank members 2, it is possible to reinforce the joint portion between the tank members 2 and 2 and avoid the occurrence of breakage at the joint portion. In addition, both the tank members 2 and 2 are reinforced to stabilize the installation, and further, each tank member 2 is protected. The two tank members 2, 2 reinforced with the reinforcing frame as described above are lifted with a crane, mounted on the chassis 20 of the traveling vehicle 19, and necessary piping such as the discharge pipe 11 is performed, and necessary equipment is installed. Install.
[0022]
Next, the most effective biaxial rotational molding method for forming the fluororesin film layer 12 on the inner wall of the tank chamber 3 of the substantially frustoconical tank member 2 in the tank lorry manufacturing method will be described.
[0023]
FIG. 6 shows an example of a biaxial rotational molding apparatus used for this molding method. This apparatus is composed of a firing furnace 21 and a device main body 22 arranged in the firing furnace 21. The main body 22 pivotally mounts a rotating frame body 24 on a carriage 23 so as to be rotatable around a horizontal rotation axis X, and a motor 26 is interlocked and connected to the rotating shaft 25, and a horizontal frame 27 of the rotating frame body 24 includes A motor in which the tank member mounting seat 28 is mounted via a bearing 29 so that the tank member mounting seat 28 can be rotated around a vertical rotation axis Y orthogonal to the horizontal rotation axis X, and the rotation shaft 30 of the tank member mounting seat 28 is installed on a horizontal frame 27. 31. By driving the motors 26 and 31, respectively, the tank member mounting seat 28 can be rotated around the vertical rotation axis Y while rotating around the horizontal rotation axis X. That. The illustrated biaxial rotational molding apparatus is an embodiment, and in particular, the drive source for the rotation axis around the horizontal rotation axis X and the rotation axis around the vertical rotation axis Y is connected via a known transmission means. One motor may be used, and these drive sources may be taken out of the firing furnace 21.
[0024]
Prior to the biaxial rotational molding method using this apparatus, first, the inner wall of the tank chamber 3 of the tank member 2 was baked to 350 ° C. to 420 ° C. by the flame of a burner and adhered to the inner wall during the production of the tank member 2. Deposits such as oils and fats are removed, and then, for example, a surface treatment is performed by shot blasting using an alumina abrasive, and the surface of the inner wall of the tank chamber 3 is roughened by this surface treatment, thereby improving the adhesion of the fluororesin film. Try to increase.
[0025]
After subjecting the tank member 2 to the baking and ground treatment as described above, a predetermined amount of fluororesin powder required from the manhole 13 or the inlet 14 is put into the tank chamber 3 of the tank member 2, After closing the manhole 13 and the inlet 14, the tank member 2 is clamped to a tank member mounting seat 28 of the apparatus main body 22 disposed in the firing furnace 21 of the biaxial rotational molding apparatus (not shown). And fixed in a state as shown in FIG.
[0026]
In this state, hot air h of 360 ° C. to 450 ° C. is supplied to the inside of the firing furnace 21 while being controlled by a burner provided outside the firing furnace 21, and the tank member mounting seat 28 is horizontally moved by driving the motors 26 and 31. The fluororesin film layer 12 is formed on the inner wall of the tank member 2 by baking and coating the fluororesin on the inner wall of the tank member 2 while biaxially rotating around the rotation axis X and the vertical rotation axis Y. After forming the fluororesin film layer 12 on the inner wall of the tank member 2 in this way, the temperature in the firing furnace 21 is gradually lowered so that no trouble occurs in the fluororesin film layer 12, and after the required time has elapsed, the apparatus main body 22 Is removed from the firing furnace 21 and the tank member 2 is removed from the apparatus main body 22, and then appearance inspection such as pinhole inspection and finishing of the flange surface and the like are performed.
[0027]
When the biaxial rotational molding method using such a biaxial rotational molding apparatus is adopted, the entire inner wall of the substantially frustoconical tank member 2 can be uniformly heated, whereby the tank member The uniform and favorable fluororesin film layer 12 can be formed over the entire inner wall of 2, and the corrosion resistance of the tank member 2 can be remarkably improved. Incidentally, if the tank member on which the fluororesin coating layer is to be formed is a simple cylindrical shape, a coating layer having a uniform thickness can be formed by a uniaxial rotational molding method (general rotational molding method). In the case of the non-cylindrical tank body having a truncated cone shape like the member 2, the inner wall on the tank body side in particular cannot be uniformly heated by the uniaxial rotational molding method, and is formed on the inner wall. The thickness of the coating layer is greatly varied, and is easily corroded in a short time.
[0028]
By forming the fluororesin film layer 12 on the inner wall of the tank member 2 as described above, the corrosion resistance is remarkably improved and the washability of the tank is greatly improved. The thickness of the fluororesin film layer 12 is in the range of 1 to 5 mm, usually about 2 mm. Further, as the fluorine tree forming the membrane layer 12, PVDF (2F resin), ECTFE (3F copolymer), ETFE (4F copolymer), PFA (4F copolymer), etc. are used, but the lowest cost among them. ETFE is practical.
[0029]
In the above embodiment, the case where the tank 1 is formed by the two tank members 2 has been described. However, in the tank 1 according to the present invention, the bottom surfaces 9 of the tank chambers of the plurality of tank members 2 are from both ends in the tank longitudinal direction. Of course, it may be formed by three or more tank members 2 because it is formed on the inclined bottom surface inclined downward toward the center. In this case, the tank members 2 are preferably joined to each other via the ring-shaped joint plate 4 described above.
[0030]
【The invention's effect】
According to the tank lorry of the invention according to claim 1, the tank is formed by a plurality of tank members which are arranged independently of each other adjacent to each other in the longitudinal direction and each have a tank chamber, and each tank of each tank member The bottom surface of the chamber is formed on an inclined bottom surface inclined downward from both ends in the arrangement direction of each tank member, and each tank member is joined to each other, and a bottom valve is provided at the lowest part of the inclined bottom surface. Therefore, the liquid in the tank can be collected on the center side of the tank bottom and discharged from the bottom valve on the center side, thereby suppressing the generation of residual liquid when unloading as much as possible. . In other words, even if it is a highly viscous liquid, it is possible to load and transport the highly viscous liquid without unloading the remaining liquid in each tank chamber or discharge pipe when unloading, and without requiring a lot of man-hours and labor for subsequent cleaning. It becomes like this.
[0031]
Further , according to the tank lorry of the present invention, since the plurality of tank members forming the tank are independently formed separately and each tank member is joined to each other in the longitudinal direction, the manufacture of the tank is easy. Thus, the manufacturing cost can be reduced. That is, if a tank having a bottom surface with a bottom surface that is inclined downward from both ends in the longitudinal direction of the tank toward the center is formed as a single unit, the larger the tank lorry, the more technically difficult. In addition, in the present invention, a plurality of tank members are formed independently, and the plurality of tank members are arranged in the longitudinal direction. Since they are joined to each other, they are easier to manufacture than the single manufacturing method described above, do not require large-scale equipment, and can reduce costs.
[0032]
Furthermore , according to the tank lorry of the present invention , a ring-shaped (annular) joint plate is separately manufactured, and this ring-shaped joint plate is fixed to the two tank members so as to cover the respective hook-shaped ends, and thereafter Since the opposite end edges of both joint plates are fixed to each other, even if the opposite end portions of both tank members are bowl-shaped, the bottoms of both tank members are inclined toward the opposite end portions, Both tank members can be connected to each other accurately and firmly even when the opposing end portions are difficult to weld further.
[0033]
Since the fluororesin film layer is formed on the inner wall of the tank chamber of each tank member as described in claim 2, the corrosion resistance of the tank is remarkably improved by this fluororesin film layer, and the inclination of each tank chamber Combined with the bottom surface, the cleanability of the tank is very good.
[0034]
According to the tank lorry of the invention according to claim 3, by attaching a reinforcing frame such as a protective frame or a side frame over the tank members, the joint portion between the tank members is reinforced to prevent damage at the joint portion. In addition to being able to avoid this, the entire tank member can be reinforced to stabilize the installation.
[Brief description of the drawings]
FIG. 1 is a side view showing an entire tank lorry according to the present invention.
FIG. 2 is a partial sectional side view showing two tank members individually.
FIG. 3 is a side view showing a state in which a joint plate, a side frame mounting seat, a protective frame mounting seat, and a subframe mounting seat are mounted on each of two tank members.
FIGS. 4A to 4C are process diagrams of a tank truck manufacturing method.
FIGS. 5A to 5C are end views of the tank member viewed from the small-diameter end plate portion in FIGS. 4A to 4C, respectively.
FIG. 6 is a cross-sectional view showing a biaxial rotational molding apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tank 2 Tank member 3 Tank chamber 4 Joint plate 6 Protective frame 7 Subframe 9 Inclined bottom face of tank member 12 Fluororesin film layer

Claims (3)

A tank lorry for loading and transporting a liquid, which is a dangerous substance, in a tank chamber of a tank, and the tank is formed by a plurality of tank members that are arranged independently of each other adjacent to each other in the longitudinal direction and each have a tank chamber. And the bottom surface of each tank chamber of each tank member is formed as an inclined bottom surface inclined downward from both ends in the arrangement direction of each tank member toward the center so as to cover opposite ends of both tank members. By fixing the ring-shaped joint plates to each other and fixing the opposing edges of the joint plates to each other, the tank members are joined to each other in the longitudinal direction, and the bottom is located at the lowest position of the inclined bottom surface. Tank lorry with a valve.   The tank lorry according to claim 1, wherein a fluororesin film layer is formed on an inner wall of a tank chamber of each tank member. The tank lorry according to claim 1 or 2, wherein a reinforcing frame such as a protective frame or a side frame is attached to each tank member.

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