Horizontal liquid storage tank and water cooling device equipped with the horizontal liquid storage tank

Abstract

To provide a novel liquid storage tank capable of discharging existing liquid from within the liquid storage tank to the downstream side in response to the expansion pressure of a lump of liquid heated to an abnormally high temperature without the liquid heated to an abnormally high temperature and the existing liquid mixing with each other even in a liquid storage tank having a horizontal length, and to provide a water cooling facility equipped with the liquid storage tank. [Solution] A tank body (liquid storage tank body) 31 having a length in the horizontal direction is provided with a plurality of liquid reduction devices 1A, 1B arranged above the tank body 31 along the length of the tank body 31, and a plurality of liquid discharge devices 2A, 2B arranged below the tank body 31 along the length of the tank body 31, and liquid is discharged downstream from the liquid discharge devices 2A, 2B in accordance with the discharge pressure from the plurality of liquid reduction devices 1A, 1B. The liquid discharge devices 2A, 2B have the same outer diameter as that of the liquid reduction devices 2A, 2B.

Description

[Technical field]

[0001] The present invention relates to a liquid storage tank that stores liquid inside, and in particular to a horizontal liquid storage tank having a horizontal length and a cylindrical side plate portion, and to a water cooling system equipped with such a horizontal liquid storage tank. [Background technology]

[0002] Up until now, cooling systems (water-cooling equipment) have been proposed that include a water-cooling type cooling device (temperature maintaining device) that maintains the temperature of a specific object (cooled object) such as a server computer at a low temperature (see Patent Document 1). On the other hand, the present applicant has disclosed a new liquid storage tank and a water-cooling equipment equipped with this liquid storage tank (Patent Document 2). This liquid storage tank comprises an inlet pipe through which liquid flows, a liquid storage tank body to which the inlet pipe is connected and which has a length in the extension direction, a discharge pipe through which the liquid in the liquid storage tank body flows downstream, and a liquid deceleration and discharge device (hereinafter referred to as the liquid deceleration device) which is arranged on the upper side of the liquid storage tank body and which decelerates the inflow speed of the liquid flowing in from the inlet pipe. The liquid deceleration device comprises a plurality of reduction discs which are arranged in parallel to each other at a predetermined interval from the tip side of the inlet pipe and are each formed into a disk shape, and a flow opening formed in each of the other reduction discs except for a specific reduction disc which is arranged at a position furthest from the inlet pipe, and the inner diameter of the flow opening formed in each of the other reduction discs becomes gradually smaller as it moves away from the other reduction disc which is closest to the inlet pipe.

[0003] The water cooling equipment includes a specific object (object to be cooled) such as a server computer, a cooling device connected to the object to be cooled through a pipeline to cool the liquid heated by cooling the object to be cooled, and a pump to pump the liquid cooled by the cooling device through a main pipeline, and a bypass pipeline is formed between the position of the pump and the object to be cooled, and a liquid storage tank according to the above-mentioned configuration is arranged in the middle of the bypass pipeline. The other end of an inflow pipe, one end of which is connected to the liquid storage tank body, is connected to the middle of the main pipeline and is a part through which liquid flows from the cooling device side, and the other end of an exhaust pipe, one end of which is connected to the liquid storage tank body, is connected to the middle of the main pipeline on the side of the object to be cooled (downstream side), and causes the liquid in the liquid storage tank body to flow to the object to be cooled. A manual valve is arranged in the middle of the main pipeline to allow the liquid from the cooling device to flow to the bypass circuit by blocking the middle of the main pipeline.

[0004] Therefore, when the water cooling equipment is operating normally, the liquid cooled by the cooling device circulates without passing through the bypass pipe, while when an abnormality occurs in the cooling device or the like and liquid that has not been cooled to a desired temperature flows (flows) into the main pipe, the manual valve closes the main pipe and the liquid flows into the bypass pipe, and then flows into the liquid storage tank body according to the above-mentioned configuration (the configuration disclosed in Patent Document 2). Then, when the liquid is supplied from the inflow pipe to the liquid deceleration device, the flow rate of the liquid supplied from the tip of the inflow pipe is decelerated and supplied to the upper side of the liquid storage tank. In the liquid storage tank, the liquid is discharged from the discharge pipe according to the pressure caused by the supply of the liquid. Therefore, according to the liquid storage tank disclosed in Patent Document 2, the liquid that flows into the liquid storage tank does not mix with the existing liquid, and it is possible to effectively prevent the liquid that flows into the liquid storage tank from being discharged to the outside before a part of the existing liquid. In the water-cooling equipment, if, for example, some abnormality occurs in the water-cooled cooling device (temperature maintenance device) and liquid of a higher temperature (hereinafter referred to as high-temperature liquid) different from the specified temperature flows into the liquid storage tank through the inlet pipe, the time until this high-temperature liquid is discharged from the outlet pipe and supplied to the cooled body can be delayed as much as possible. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2024-119393 A [Patent Document 2] Patent No. 7549367 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the liquid storage tank disclosed in Patent Document 2 has a length in the vertical direction, but depending on the environment in which the water-cooling equipment is installed, there may be no space to place the liquid storage tank having a length in the vertical direction. In addition, a liquid storage tank having a length in the vertical direction may be at risk of tipping over in the event of an earthquake. In consideration of the environment of the water-cooling equipment and earthquake disasters, a liquid storage tank having a length in the horizontal direction must be manufactured and placed, but the internal structure of the liquid storage tank disclosed in Patent Document 2 cannot be directly applied to such a liquid storage tank having a length in the horizontal direction. In other words, since a liquid storage tank has a horizontal length, its horizontal length is literally longer than its vertical length (height), even if a liquid reduction device having multiple reduction disks as disclosed in Patent Document 2 is placed in the upper part of the liquid storage tank, the high-temperature liquid will reach both ends of the upper part of the liquid storage tank, and this high-temperature liquid will form a lump, so to speak, throughout the entire upper part.As the high-temperature liquid continues to flow in, the distribution range of the lump will gradually expand downward, and as the distribution range of the lump expands downward, the existing liquid cannot be discharged from the liquid storage tank to the downstream side.

[0007] Therefore, the present invention has been proposed to solve the problems associated with the conventional liquid storage tanks described above, and aims to provide a new liquid storage tank and water cooling equipment equipped with the liquid storage tank, in which even in a liquid storage tank having a horizontal length, the high-temperature liquid will reach both ends of the upper part of the liquid storage tank, and the high-temperature liquid will form a lump, so to speak, throughout the entire upper part, and as the high-temperature liquid continues to flow in, the distribution range of the lump will gradually expand downward, and existing liquid can be discharged from the liquid storage tank to the downstream side in response to the downward expansion pressure of the distribution range of this lump. [Means for solving the problem]

[0008] The present invention has been proposed to solve the above-mentioned problems, and the first invention (the invention described in claim 1) relates to a horizontal liquid storage tank, and comprises a liquid storage tank body having a horizontal length and a cylindrically shaped side plate portion, a plurality of liquid reduction devices each arranged at the upper part inside the liquid storage tank body, into which liquid supplied from the upstream side into the liquid storage tank body flows and which reduce the flow rate of the liquid supplied into the liquid storage tank body, and which are shaped with an overall outer shape of a cylinder or a truncated cone, and a plurality of liquid discharge devices into which liquid from the lower part inside the liquid storage tank body flows and which discharge the liquid that has flowed into the interior from inside the liquid storage tank body to the downstream side, each of the liquid reduction devices being arranged in parallel at a predetermined interval from each other along the length direction of the liquid storage tank body, and each liquid reduction device having a central a plurality of reduction disc bodies each having a flow opening through which the liquid supplied from the upstream side flows, the plurality of liquid discharge devices being arranged in parallel in the vertical direction at a predetermined interval, the plurality of liquid discharge devices each having a flow opening formed therein, the plurality of liquid discharge devices each having a flow opening through which the liquid supplied from the upstream side flows ...

[0009] In the horizontal liquid storage tank of this first invention, when the liquid supplied from the upstream side flows into each of the multiple liquid reduction devices, the liquid is discharged radially from the liquid reduction device while its flow rate is slowed down by the multiple speed reduction disks that make up the liquid reduction device, and the liquid flows into the liquid discharge device main body from below in accordance with the discharge pressure from the liquid reduction device (the inflow pressure into the liquid storage tank main body) and is discharged from the liquid storage tank main body to the downstream side.

[0010] In particular, in this first invention, not only are the liquid reduction devices arranged in parallel at a predetermined interval from each other in the upper part of the liquid storage tank body along the length of the liquid storage tank body, but the liquid discharge device has the same outer diameter as the outer diameter dimension of the liquid reduction device and is molded into an overall outer shape of a cylinder or a truncated cone.Therefore, even if the liquid storage tank has a length in the horizontal direction, the liquid that has been heated to an abnormally high temperature is formed like a lump, so to speak, throughout the entire upper side, and as the inflow of the abnormally high temperature liquid continues, the distribution range of the lump gradually expands downward.As the distribution range of this lump expands downward, it becomes possible to gradually discharge existing liquid from the liquid discharge device body of the above-mentioned configuration to the downstream side from within the liquid storage tank body (a push-out flow or piston flow can be realized).

[0011] Each of the liquid reduction devices may include a plurality of reduction disks each formed in a disk shape, and a flow opening formed in the center of each of the other reduction disks except for a specific reduction disk arranged at a position farthest from a portion into which the liquid supplied from the upstream side flows, and the inner diameter of the flow opening formed in each of the other reduction disks becomes gradually smaller as the flow opening becomes farther away from the other reduction disk closest to the portion into which the liquid supplied from the upstream side flows, and the liquid supplied from the upstream side passes to the other reduction disks in order from the flow opening closest to the portion into which the liquid supplied from the upstream side flows, and a portion of the liquid passes through a flow space formed by the other reduction disks facing each other and a flow space formed by the specific reduction disk and the other reduction disk facing each other while radially reducing its speed from the center of the flow opening, and is discharged to the outside of the reduction disks. In addition, it is preferable that a flow opening having an inner diameter shorter than the inner diameter of the flow opening formed in the other reduction disc body facing the specific reduction disc body is formed in the center of the specific reduction disc body, and it is further preferable that the inner diameter of the flow opening formed in each of the other reduction disc bodies, or the inner diameter of these flow openings and the flow opening formed in the specific reduction disc body, are set to a dimension such that the fluid passing through the flow space formed by the other reduction disc bodies facing each other and the flow space formed by the specific reduction disc body facing the other reduction disc bodies while slowing down radially from the center of the flow opening and being discharged outside the reduction disc body has a substantially uniform discharge speed.

[0012] In addition, the second invention (the invention described in claim 2) is characterized in that, in the first invention, each of the liquid discharge devices has a cylindrical side plate portion, a top plate portion located on the top of the side plate portion, and an opening formed in the center of the top plate portion and connected to a pipeline for discharging liquid to the downstream side, or has an outer diameter shaped like a truncated cone and has an inflow space inside whose inner diameter gradually decreases from bottom to top, and liquid below the liquid storage tank body flows in from below the side plate portion or below the inflow space, passes through the pipeline, and is discharged to the downstream side of the liquid storage tank body.

[0013] In the horizontal liquid storage tank of this second invention, the existing liquid stored in the liquid storage tank body flows into the liquid storage tank body from below the side plate portion or below the inflow space in accordance with the discharge pressure (inflow pressure into the liquid storage tank body) from the liquid reduction device, and is discharged to the downstream side of the liquid storage tank body through the lower discharge pipe.

[0014] The liquid discharge device may be one in which a plurality of openings are formed in the side plate portion, and liquid below the liquid storage tank body flows in through the lower side plate portion and the plurality of openings.

[0015] In addition, the third invention (the invention described in claim 3) is characterized in that, in the first invention, a first distance, which is the distance between one liquid reduction device among the multiple liquid reduction devices that is closest to one end of the liquid storage tank body and one end of the liquid storage tank body, and a second distance, which is the distance between the other liquid reduction device that is closest to the other end of the liquid storage tank body and the other end of the liquid storage tank body, are each the same, and a third distance, which is the distance between the one liquid reduction device and the other liquid reduction device, or the distance between adjacent liquid reduction devices among the multiple liquid reduction devices, is twice the first and second distances.

[0016] In the horizontal liquid storage tank of the third invention, since the first and second distances and the third distance are respectively as described above, the liquid (liquid at an abnormally high temperature) flowing in from the inlet pipe can be distributed evenly throughout the upper part of the liquid storage tank body, and the occupied area within the liquid storage tank can be gradually increased from the upper side of the liquid storage tank while gradually increasing the distribution range of the liquid flowing into the liquid storage tank body (a push-out flow or piston flow can be realized).

[0017] In addition, the fourth invention (the invention described in claim 4) is characterized in that, in the third invention described above, each of the multiple liquid discharge devices is arranged directly below each of the multiple liquid reduction devices.

[0018] In the horizontal liquid storage tank of the fourth invention, each of the multiple liquid discharge devices is positioned directly below each of the multiple liquid reduction devices, so that the distribution range of the liquid flowing into the liquid storage tank body can be gradually increased with even greater precision, while the occupied area within the liquid storage tank can be gradually increased from the upper side of the liquid storage tank (a push-out flow or piston flow can be realized).

[0019] The fifth invention (the invention described in claim 5) is any one of the first, second, third or fourth inventions, wherein an upper branch pipe line into which the liquid supplied from the upstream side flows is disposed within the liquid storage tank body, and the upper branch pipe line includes an upper horizontal pipe section having a length in the same direction as the longitudinal direction of the liquid storage tank body, one upper curved section formed at one end of the upper horizontal pipe section, another upper curved section formed at the other end of the upper horizontal pipe section, one upright pipe section standing upward from the one upper curved section, and another upright pipe section standing upward from the other upper curved section, and the liquid reduction device is connected to the upper ends of the one upright pipe section and the other upright pipe section, A lower branch pipeline is arranged within the storage tank body, and this lower branch pipeline comprises a lower horizontal pipe section having a length in the same direction as the longitudinal direction of the liquid storage tank body, one lower curved section formed at one end of the lower horizontal pipe section, the other lower curved section formed at the other end of the horizontal pipe section, one hanging pipe section hanging downward from the one lower curved section, and the other hanging pipe section hanging downward from the other lower curved section, and the liquid discharge device is connected to the lower ends of the one hanging pipe section and the other hanging pipe section, and the lower horizontal pipe section is arranged directly below the upper horizontal pipe section, and the lower horizontal pipe section and the upper horizontal pipe section are of the same length.

[0020] In the horizontal liquid storage tank according to the fifth invention, the liquid storage tank body has an outer shape formed in a cylindrical shape. In other words, the inside of the liquid storage tank body is made up of a cylindrical side plate, a closing plate formed at one end of the side plate and shaped like a disk to close one of the openings of the side plate, and a closing plate formed at the other end of the side plate and shaped like a disk to close the other opening of the side plate. In the horizontal liquid storage tank according to the fifth invention, the upper branch pipe and the lower branch pipe are disposed in the liquid storage tank body, the liquid reduction gear is connected to the upper ends of the one and the other upright pipes constituting the upper branch pipe, and the liquid discharge gear is connected to the lower ends of the one and the other hanging pipes constituting the lower branch pipe, and in particular, the lower horizontal pipe is disposed directly below the upper horizontal pipe, and the lower horizontal pipe and the upper horizontal pipe are of the same length. Thus, with the horizontal liquid storage tank according to this configuration, the distribution range of the liquid flowing into the liquid storage tank body can be gradually increased with even higher accuracy while the occupied area in the liquid storage tank can be gradually increased from the upper side of the horizontal liquid storage tank (a push flow or a piston flow can be realized).

[0021] Furthermore, the sixth invention (the invention described in claim 6) is characterized in that, in the fifth invention, when the upper horizontal pipe section and the multiple liquid reduction devices, and the lower horizontal pipe section and the multiple liquid discharge devices are considered to be one unit, multiple units are arranged within the liquid storage tank body along the length of the liquid storage tank body.

[0022] According to the horizontal liquid storage tank of the sixth invention, even if the liquid storage tank body is longer in the horizontal direction, the effect of the fifth invention can be realized, and at least the upper horizontal pipe section, the lower horizontal pipe section, the liquid reduction device, and the liquid discharge device can be mass-produced and used as identical parts. In other words, even if the liquid storage tank body is longer in the horizontal direction, at least the upper horizontal pipe section, the lower horizontal pipe section, the liquid reduction device, and the liquid discharge device can be mass-produced and assembled with the same shape and structure, so that the horizontal liquid storage tank can be manufactured at low cost.

[0023] In addition, the seventh invention (the invention described in claim 7) relates to a water-cooling system comprising: a body to be cooled; a cooling device connected to the body to be cooled via a downstream pipeline, into which liquid flows after cooling the body to cool the liquid; an upstream main pipeline connected to the cooling device to supply the liquid cooled by the cooling device to the body to be cooled and having a manual valve disposed in the middle of the pipeline; a bypass pipeline formed in the middle of the upstream main pipeline, into which liquid from the cooling device flows when the manual valve is closed and which circulates the liquid to the body to be cooled; and a liquid storage tank disposed in the middle of the bypass pipeline, wherein the liquid storage tank is a horizontal liquid storage tank according to any one of the first to sixth inventions.

[0024] According to the water-cooling equipment of the seventh invention, for example, if some abnormality occurs in the cooling device or the like and liquid of a higher temperature different from the specified temperature flows into the liquid storage tank from the upstream side, the time until this liquid of abnormal temperature flows out downstream and is supplied to the cooled object can be delayed as long as possible, effectively avoiding the risk of damaging the cooled object. Effect of the Invention

[0025] According to this invention, even in the case of a horizontal liquid storage tank having a length in the horizontal direction, the abnormally high temperature liquid spreads to both ends of the upper part of the horizontal liquid storage tank, and the abnormally high temperature liquid is formed like a mass throughout the entire upper part of the liquid storage tank body, and as the abnormally high temperature liquid continues to flow in, the distribution range of the mass gradually spreads downward, and as the distribution range of the mass spreads downward, the existing liquid can be discharged from the liquid storage tank to the downstream side. In other words, this invention makes it possible to realize a push-out flow or piston flow in which the liquid that has flowed into the liquid storage tank body pushes out the existing liquid.

[0026] In particular, according to the second to sixth aspects (the aspects described in claims 2 to 6), it is possible to achieve the effects of the first aspect with higher accuracy. [Brief description of the drawings]

[0027] [Figure 1] FIG. 1 is a circuit diagram showing a schematic configuration of an entire water cooling system. [Diagram 2] FIG. 2 is a perspective view showing an example of a buffer tank (liquid storage tank) shown in FIG. [Diagram 3] 2 is a cross-sectional view showing the positional relationship between an inlet pipe and a discharge pipe that configure the buffer tank shown in FIG. 1. [Figure 4] 2 is a side view showing the positional relationship between a liquid reduction gear and a liquid discharge device that constitute the buffer tank shown in FIG. 1, and the positional relationship between the liquid reduction gear and a tank body. FIG. [Diagram 5] FIG. 2 is a side cross-sectional view showing an example of a liquid reduction gear device. [Figure 6] 6 shows the reduction disc body shown in FIG. 5, where (A) is a plan view showing the first reduction disc body, (B) is a plan view showing the second reduction disc body, (C) is a plan view showing the third reduction disc body, (D) is a plan view showing the fourth reduction disc body, and (E) is a plan view showing the fifth reduction disc body. [Figure 7] FIG. 3 is a perspective view showing the liquid discharging device shown in FIG. 2. [Figure 8] FIG. 8 is a cross-sectional view showing the liquid discharging device shown in FIG. [Figure 9] 11 is a schematic diagram showing a state after liquid has flowed into the buffer tank from the liquid reduction device. FIG. [Figure 10] 10 is a schematic diagram showing a state after liquid has further flowed into the buffer tank from the state shown in FIG. 9. FIG. [Figure 11] FIG. 11 is a perspective view showing another example of the buffer tank. [Figure 12] FIG. 11 is a side view showing still another example of the buffer tank. [Figure 13] FIG. 13 is a cross-sectional view showing another example of the buffer tank shown in FIG. [Figure 14] FIG. 2 is an enlarged cross-sectional view showing a first liquid discharging device. BEST MODE FOR CARRYING OUT THEINVENTION

[0028] Hereinafter, an embodiment of the water cooling equipment according to the present invention will be described, and then the liquid storage tank according to the present invention will be described in detail with reference to the drawings.

[0029] 1, the water cooling equipment 12 according to the present invention includes a cooled object 14 such as a server computer that is cooled to a predetermined temperature by cooling water, and a cooling device 15 that cools the cooling water that cools the cooled object 14. The cooled object 14 and the cooling device 15 are connected by a first pipe (main pipe or upstream main pipe) 16 that circulates the cooling water from the cooling device 15 to the cooled object 14 side, and the cooled object 14 and the cooling device 15 are connected to a second pipe (downstream pipe) 17 that circulates the cooling water (hereinafter referred to as high-temperature cooling water) that has been heated by passing through the cooled object 14 to the cooling device 15 side. A manual valve 18 is disposed in the middle of the first pipeline 16, and a bypass pipeline 21 consisting of one bypass pipeline 21a and the other bypass pipeline 21b that bypasses the manual valve 18 without passing through the manual valve 18 is provided, and the buffer tank (horizontal liquid storage tank according to the present invention) 13 is disposed between the one bypass pipeline 21a and the other bypass pipeline 21b. A main power source 19 and a backup power source 20 that drive the cooling device 15 are connected to the cooling device 15. A pump 22 that pumps the liquid cooled by the cooling device 15 to the first pipeline 16 side (manual valve 18) or the bypass pipeline 21a side is disposed upstream of the bypass pipeline 21a.

[0030] Next, the buffer tank (horizontal liquid storage tank according to the present invention) 13 will be described. The buffer tank 13 is a pressure vessel according to the first embodiment, made of stainless steel, having a horizontal length and formed into a substantially cylindrical outer shape, and as shown in Fig. 2, 3, or 4, includes a tank body 31 shown by a dashed line in Fig. 2, an inlet pipe 32 disposed in the upper part of the tank body 31, and an upper branch pipe 33 connected to the inlet pipe 32. As shown in Fig. 2, the tank body 31 is composed of a cylindrical side plate portion 31a, one closing portion 31b fixed (welded) to one end (left end in Fig. 2) of the side plate portion 31a and closing an opening on one side of the side plate portion 31a, and the other closing portion 31c fixed to the other end (right end in Fig. 2) of the side plate portion 31a and closing an opening on the other side of the side plate portion 31a. 3, one end of the inflow pipe 32 is connected to an end of the one bypass pipe 21a outside the tank body 31, and a middle portion of the inflow pipe 32 passes through an opening (reference numeral omitted) formed in the side plate portion 31a and extends horizontally into the tank body 31 from a position slightly above the center (center) of the side plate portion 31a of the tank body 31. As shown in FIG. 2, the upper branch pipe 33 is composed of an upper horizontal pipe portion 33a having a length in the same direction as the longitudinal direction of the tank body 31, one upper curved pipe portion 33b formed at one end of the upper horizontal pipe portion 33a, the other upper curved pipe portion 33c formed at the other end of the upper horizontal pipe portion 33a, one upright pipe portion 33d standing upward from the one upper curved pipe portion 33b, and the other upright pipe portion 33e standing upward from the other upper curved pipe portion 33c. As shown in FIG. 3, the center of the upper horizontal pipe portion 33a is located slightly above the center of the tank body 31.

[0031] A first liquid reduction gear 1A, which will be described later, is fixed to the upper end of the one upright pipe section 33d, and a second liquid reduction gear 1B, which will be described later, is fixed to the upper end of the other upright pipe section 33e. The first liquid reduction gear 1A and the second liquid reduction gear 1B have the same configuration.

[0032] 2, the buffer tank 13 includes a discharge pipe 35 disposed in the lower part of the tank body 31 and a lower branch pipe 36 connected to the discharge pipe 35. As shown in FIG. 3, one end of the discharge pipe 35 is connected to the end of the other bypass pipe 21b outside the tank body 31, and a middle part of the discharge pipe 35 passes through an opening (reference numeral omitted) formed in the side plate part 31a and extends into the tank body 31 from a position slightly lower than the center (center) of the side plate part 31a of the tank body 31. In other words, the inflow pipe 32 and the discharge pipe 35 are formed to have the same length, and the inflow pipe 32 and the discharge pipe 35 are arranged at positions point-symmetrical to each other. 2, the lower branch pipe 36 is composed of a lower horizontal pipe section 36a having a length in the same direction as the longitudinal direction of the tank body 31, one lower curved pipe section 36b formed at one end of the lower horizontal pipe section 36a, the other lower curved pipe section 36c formed at the other end of the lower horizontal pipe section 36a, one hanging pipe section 36d hanging downward from the one lower curved pipe section 36b, and the other hanging pipe section 36e hanging downward from the other lower curved pipe section 36c. As shown in FIG. 3, the center of the lower horizontal pipe section 36a is located slightly below the center of the tank body 31.

[0033] A first liquid discharge device 2A is fixed to the lower end of the one of the hanging pipe portions 36d, and a second liquid discharge device 2B is fixed to the lower end of the other of the hanging pipe portions 36e. The first liquid discharge device 2A is disposed directly below the first liquid reduction device 1A, and the second liquid discharge device 2B is disposed directly below the second liquid reduction device 1B, and the outer diameter of the first liquid discharge device 2A is formed to be the same as the outer diameter of the first liquid reduction device 1A, and the outer diameter of the second liquid discharge device 2B is formed to be the same as the outer diameter of the second liquid reduction device 1B.

[0034] Also, as shown in Figure 4, the distance L1 from the inner wall surface of one disc plate portion 31b constituting the tank body 31 to the first liquid reduction gear 1A and the distance L2 from the inner wall surface of the other disc plate portion 31c constituting the tank body 31 to the second liquid reduction gear 1B are the same distance, and the distance L3 from the first liquid reduction gear 1A to the second liquid reduction gear 1B is twice the distance L1 (L2). Therefore, as described above, the distance from the first liquid discharge device 1C located directly below the first liquid reduction device 1A and the inner wall surface of one of the disc plate portions 31b constituting the tank body 31 to the first liquid discharge device 1C is the same as the distance L1, the distance from the second liquid discharge device 2B located directly below the second liquid reduction device 1B to the inner wall surface of the other disc plate portion 31b constituting the tank body 31 is the same as the distance L2, and the distance L3 from the first liquid discharge device 2A to the second liquid discharge device 2B is twice the distance L1 (L2).

[0035] Next, the first and second liquid reduction devices 1A, 1B and the first and second liquid discharge devices 2A, 2B will be described in detail. As these have the same configuration as described above, the liquid reduction device 1A will be described in detail below with reference to FIG.

[0036] The liquid reduction gear 1A according to this embodiment includes a first reduction disk body 3, a second reduction disk body 4, a third reduction disk body 5, a fourth reduction disk body 6, and a fifth reduction disk body 7, each of which is molded to have the same outer diameter. The first reduction disk body 3 is fixed to the upper end of one of the upright tube portions 33d, the second reduction disk body 4 faces the first reduction disk body 3 in parallel, the third reduction disk body 5 faces the second reduction disk body 4 in parallel, the fourth reduction disk body 6 faces the third reduction disk body 5 in parallel, and the fifth reduction disk body 7 faces the fourth reduction disk body 6 in parallel. Therefore, a first flow space is formed between the first reduction disc 3 and the second reduction disc 4, a second flow space is formed between the second reduction disc 4 and the third reduction disc 5, a third flow space is formed between the third reduction disc 5 and the fourth reduction disc 6, and a fourth flow space is formed between the fourth reduction disc 6 and the fifth reduction disc 7, and the volumes of these first to fifth flow spaces are all the same. The first to fifth reduction discs 3, 4, 5, 6, 7 are arranged at equal intervals. In the center of the first reduction disk 3, as shown in Fig. 6(A), a first flow opening 3a is formed with an opening area substantially equal to the opening area of ​​the tip of the one upright tube portion 33d, in the center of the second reduction disk 4, as shown in Fig. 6(B), a second flow opening 4a is formed, in the center of the third reduction disk 5, as shown in Fig. 6(C), a fourth flow opening 6a is formed, in the center of the fourth reduction disk 6, as shown in Fig. 6(D), and a fifth flow opening 7a is formed, in the center of the fifth reduction disk 7, as shown in Fig. 6(E). As is clear from Fig. 6(A) to Fig. 6(E), the inner diameters of the first flow opening 3a to the fifth flow opening 7a are gradually shortened. Further, the first to fifth reduction disks 3, 4, 5, 6, 7 are each formed with a plurality of insertion holes 3b, 4b, 5b, 6b, 7b through which a shaft portion 8b of a fixing bolt 8, which will be described later, passes.6, fixing bolts 8 are inserted into the insertion holes 3b, 4b, 5b, 6b, 7b, with heads 8a of the fixing bolts 8 positioned on the upper surface of the fifth reduction disc 7, and fixing nuts 9 are screwed onto the ends of the shafts 8b of the fixing bolts 8 positioned on the lower surface side of the first reduction disc 3. Cylindrical spacers 10 formed to the same length are disposed between the first reduction disc 3 and the second reduction disc 4, between the second reduction disc 4 and the third reduction disc 5, between the third reduction disc 5 and the fourth reduction disc 6, and between the fourth reduction disc 6 and the fifth reduction disc 7, and the shafts 8b of the fixing bolts 8 are inserted into these spacers 10. That is, the first to fifth reduction disc bodies 3, 4, 5, 6, and 7 are fixed and integrated at equal intervals via the plurality of spacers 10 by screwing and fastening the fixing nuts 9 onto the respective fixing bolts 8. Note that a side plate 11 made of a punching metal having a large number of through holes (not shown, reference numerals are omitted) formed therein is fixed to the outside of the first to fifth reduction disc bodies 3, 4, 5, 6, and 7.

[0037] Therefore, according to the (first) liquid reduction device 1A, when liquid flows in from the tip (upper end) of one of the upright pipes 33d, a part of the liquid passes through the first flow opening 3a and flows in the direction of the second flow opening 4a, and the remaining liquid collides with the second reduction disc 4, flows radially from the center of the lower surface side (the first flow space) of the second reduction disc 4 in FIG. 5, and is discharged radially through the through holes formed in the side plate 11 while its flow speed is gradually reduced. Also, a part of the liquid that has passed through the second flow opening 4a flows in the direction of the third flow opening 5a formed in the third reduction disc 5, and the remaining liquid flows radially from the center of the lower surface side (the second flow space) of the third reduction disc 5 in FIG. 5, and is discharged radially through the through holes formed in the side plate 11 while its flow speed is gradually reduced. A part of the liquid that has passed through the third flow opening 5a flows in the direction of the fourth flow opening 6a formed in the fourth reduction disc 6, and the remaining liquid flows radially from the center of the lower surface side (the third flow space) of the fourth reduction disc 6 in FIG. 5, and while its flow speed is gradually reduced, it is discharged radially through the through holes formed in the side plate 11. A part of the liquid that has passed through the fourth flow opening 6a flows in the direction of the fifth flow opening 7a formed in the seventh reduction disc 7 and is discharged upward from the fifth flow opening 7a, and the remaining liquid flows radially from the center of the lower surface side (the fourth flow space) of the fifth reduction disc 7 in FIG. 5, and while its flow speed is gradually reduced, it is discharged radially through the through holes formed in the side plate 11. That is, the flow rate of the liquid that flows into the (first) liquid reduction device 1A from the tip (upper end) side of the one of the upright pipe sections 33d is gradually slowed down through the above-mentioned process and is discharged radially from the center of the (first) liquid reduction device 1A and to the upper side of the tank main body 31a.

[0038] In the first liquid reduction gear 1A, it is desirable that the discharge speeds of the liquid discharged from at least the first to fourth circulation spaces to the outside are constant. Therefore, in the design stage, as described below, a method can be adopted in which a plurality of variables (parameters) and calculation formulas are input into a spreadsheet program, and the variables are appropriately changed so that the discharge speeds are approximately constant, and finally the inner diameters of the first, second, third and fourth circulation openings 3a, 4a, 5a and 6a are determined. An example of the calculation formulas is described below.

[0039] (1) Sum of intersection areas Here, the intersection area refers to the difference in area between adjacent flow openings (for example, vertically). (area of ​​one upright pipe section 33d-area of ​​first flow opening 3a)+(area of ​​first flow opening 3a-area of ​​second flow opening 4a)+(area of ​​second flow opening 4a-area of ​​third flow opening 5a)+(area of ​​third flow opening 5a-area of ​​fourth flow opening 6a) (2) Unit area flow rate and flow rate of each circulation space "Unit area flow rate (A)" = Flow rate / Total intersection area Flow rate of the first flow space (B1) = intersection area of ​​the first reduction disk body 3 × (A) Flow rate of the second flow space (B2) = intersection area of ​​the second reduction disk body 4 × (A) Flow rate of the third flow space (B3) = intersection area of ​​the third reduction disk body 5 × (A) Flow rate of the fourth flow space (B4) = intersection area of ​​the fourth reduction disk body 6 × (A) (3) Side area of ​​each circulation space Side area of ​​the first flow space (C1) = Perimeter of the first flow space × Length of the busbar Side area of ​​the second flow space (C2) = Perimeter of the second flow space × Length of the busbar Side area of ​​the third flow space (C3) = Perimeter of the third flow space × Length of the busbar Side area of ​​the fourth flow space (C4) = Perimeter of the fourth flow space × Length of the busbar (4)Flow velocity Flow velocity in the first flow space (D1)=(B1) / (C1) Flow velocity in the second flow space (D2) = (B2) / (C2) Flow velocity in the third flow space (D3) = (B3) / (C3) Flow velocity in the fourth flow space (D4) = (B4) / (C4)

[0040] In the first liquid reduction gear 1A, the area of ​​the tip (upper end) of one of the upright pipe sections 33d and the "flow rate" of the liquid flowing in from the inside of this one of the upright pipe sections 33d, which are elements for calculating the "unit area flow rate", are constant, and the respective intersection areas are proportional to the respective inner diameters of the first circulation opening 3a, the second circulation opening 4a, the third circulation opening 5a, and the fourth circulation opening 6a. In addition, the respective circumferential lengths of the first to fourth circulation spaces, which are elements for calculating the flow rate of the first circulation space, the flow rate of the second circulation space, the flow rate of the third circulation space, and the flow rate of the fourth circulation space, are input with specific values ​​if the outer diameter dimensions of the first to fourth reduction disks 3, 4, 5, and 6 are respectively determined, and further, if the lengths of the generatrix are respectively determined, there is no need to change the respective values. Therefore, in this example, the inner diameters of the first flow opening 3a, the second flow opening 4a, the third flow opening 5a, and the fourth flow opening 6a may be changed so that the flow velocities (D1), (D2), (D3), and (D4) of the flow spaces obtained by the above calculation formula are substantially constant, and as a result, once the inner diameters of the first flow opening 3a, the second flow opening 4a, the third flow opening 5a, and the fourth flow opening 6a are determined, they can be manufactured. Needless to say, when the "flow rate" of the liquid is different, it is necessary to change it appropriately and repeat the above operation to determine the inner diameters of the first flow opening 3a, the second flow opening 4a, the third flow opening 5a, and the fourth flow opening 6a.

[0041] Therefore, by using the above-mentioned spreadsheet program, when the inner diameters of the first flow opening 3a, the second flow opening 4a, the third flow opening 5a and the fourth flow opening 6a are determined, liquid can be discharged from each flow space at a uniform flow rate with high precision.

[0042] In the first liquid reduction gear 1A, a total of five (first to fifth) reduction disks 3, 4, 5, 6, 7 are used as components, but it is sufficient that at least a plurality of reduction disks are used as components. The intervals between the reduction disks (reference numbers omitted) do not need to be constant, and may be different from each other. In the first liquid reduction gear 1A, the fifth reduction disk 7 is formed with the fifth flow opening 7a, but the fifth reduction disk 7 may not be formed with the fifth flow opening 7a.

[0043] The first and second liquid discharge devices 2A and 2B have the same shape and structure. Hereinafter, the first liquid discharge device 2A will be described. As shown in FIG. 7 or FIG. 8, the first liquid discharge device 2A includes a cylindrical side plate portion 29, a top plate portion 30 closing the upper end of the side plate portion 29, an opening 30a (see FIG. 8) formed in the center of the top plate portion 30, and a pipe portion 30b communicating with the opening 30a, and the pipe portion 30b is connected to the lower end of the one of the hanging pipe portions 36d (in the second liquid discharge device 2B, it is connected to the other hanging pipe portion 36e). The outer diameter of the side plate portion 29 is the same as the outer diameter of the side plate 11 constituting the liquid reduction gear 1A. Therefore, as described below, liquid in the lower part of the tank body 31 flows in from below the side plate portion 29 and flows into one of the hanging pipe portions 36d, and also flows in from below the side plate portion that constitutes the second liquid discharge device 2B and flows into the other hanging pipe portion 36e.

[0044] Therefore, according to the water-cooling equipment 12 including the buffer tank 13 with the above-mentioned first liquid reduction gear 1A disposed therein, during normal operation, the cooling device 15 and the pump 22 are driven by the main power source 19, and the cooling water cooled by the cooling device 15 passes through the first pipe 16 by driving the pump 22 and is sent to the cooled body 14. Then, the high-temperature cooling water that has passed through the cooled body 14 returns to the cooling device 15. Thus, in this water-cooling equipment 12, during normal operation, the cooling water circulates in the clockwise direction as shown by the arrow in FIG. 1.

[0045] However, when the power supply from the main power source 19 is stopped while the water-cooling equipment 12 is in operation, the power source is switched to the backup power source 20, and the cooling device 15 and the pump 22 start to be driven by the power supplied from the backup power source 20, respectively. However, after the power supply from the main power source 19 is stopped, the power supply from the backup power source 20 is not started immediately, and a time lag of several minutes occurs. On the other hand, however, the circulation state of the cooling water that has been circulating until now is not immediately stopped at the same time as the power supply is stopped, and during the time lag, the cooling water circulates by inertia, so to speak. When the power supply from the main power source 19 is stopped, it is possible to immediately operate the manual valve 18 and cause the cooling water from the cooling device 15 to flow exclusively through the bypass pipe 21 (one bypass pipe 21a and the other bypass pipe 21b). In other words, for these reasons, the water cooling equipment 12 is provided with the bypass pipe 21 and the buffer tank 13 is disposed midway through the bypass pipe 21 .

[0046] When the power supply from the main power source 19 is stopped and the manual valve 18 is operated, and the cooling water (high-temperature cooling water) that has passed through the one bypass pipe 21a flows into the first liquid reduction gear 1A and the second liquid reduction gear 1B via the one upright pipe section 33d or the other upright pipe section 33e, as described above, the cooling water (high-temperature cooling water) flows out radially from the upper part of the buffer tank 13 with its flow rate in the one upright pipe section 33d or the other upright pipe section 33e slowed down, and does not mix with the cooling water of the appropriate temperature that has already been stored, nor does it naturally mix with the cooling water (high-temperature cooling water) that has flowed in and the existing cooling water due to the temperature difference between them, but rather forms a lump, so to speak, above the buffer tank 13 as shown in FIG. 9, and this lump gradually expands downward as shown in FIG. 10. In other words, by arranging the first liquid reduction device 1A and the second liquid reduction device 1B in the buffer tank 13 in the position and attitude described above, a state is formed in which the tank is divided into an upper layer consisting of the high-temperature cooling water and a lower layer consisting of cooling water at an appropriate temperature, and as the high-temperature cooling water continues to be discharged from the first liquid reduction device 1A and the second liquid reduction device 1B, the pressure causes the cooling water at the appropriate temperature (existing liquid) stored in the buffer tank 13 to flow from below the first liquid discharge device 2A and the second liquid discharge device 2B into the first liquid discharge device 2A and the second liquid discharge device 2B, and then flows into the other bypass pipe 21b via the lower branch pipe 36 and the discharge pipe 35, and is supplied to the cooled body 14 side.

[0047] In the above embodiment, two liquid reduction devices constituting the present invention and two liquid discharge devices are arranged inside the buffer tank 13, but the horizontal liquid storage tank (buffer tank) according to the present invention may have four liquid reduction devices and four liquid discharge devices arranged inside.

[0048] The buffer tank (horizontal liquid storage tank) 13 has two liquid discharge devices (first liquid reduction device 1A and second liquid reduction device 1B) arranged in the tank body 31, but the horizontal liquid storage tank according to the present invention may have three or more liquid reduction devices arranged. Fig. 11 shows a horizontal liquid storage tank (buffer tank) 51 as a second embodiment of the present invention, in which the first to fourth liquid reduction devices 61A, 61B, 61C, and 61D are arranged on the upper side of the tank body 53 having a horizontal length, and the first to fourth liquid discharge devices 62A, 62B, 62C, and 62D are arranged directly below the first to fourth liquid reduction devices 61A, 61B, 61C, and 61D. The first and second liquid reduction devices 61A, 61B and the third and fourth liquid reduction devices 61C, 61D have the same configuration as the first and second liquid reduction devices 1A, 1B described above, respectively, and the outer diameter dimensions of the first to fourth liquid discharge devices 62A, 62B, 62C, 62D are the same as the outer diameter dimensions of the first to fourth liquid reduction devices 61A, 61B, 61C, 61D, respectively.

[0049] In the horizontal liquid storage tank (buffer tank) 51 according to the second embodiment, an upper outer branch pipe 54 having a length in the same direction as the tank body 53 having a length in the horizontal direction is connected to the downstream end of the one bypass pipeline 21a, and one upper inner branch pipe 55 having the same configuration as the upper branch pipeline 33 described above is connected to one end of the upper outer branch pipe 54. In addition, the other upper inner branch pipe 56 having the same configuration as the upper branch pipeline 33 described above is connected to the other end of the upper outer branch pipe 54. The upper outer branch pipe 54 is composed of a horizontal pipe section 54a that is exposed to the outside of the tank body 53 and has a length in the same direction as the tank body 53, one hanging pipe section 54c that hangs down from one end (the left end in FIG. 11) of the horizontal pipe section 54a via one curved section 54b, extends from the outside of the tank body 53 into the inside of the tank body 53 and is connected to the center of the one upper inner branch pipe 55, and the other hanging pipe section 54e that hangs down from the other end (the right end in FIG. 8) of the horizontal pipe section 54a via the other curved section 54d, extends from the outside of the tank body 53 into the inside of the tank body 53 and is connected to the center of the other upper inner branch pipe 56 that has the same configuration as the one upper inner branch pipe 55. The first liquid reduction gear 61A is disposed at one end of the one upper inner branch pipe 55, and the second liquid reduction gear 61B is disposed at the other end of the one upper inner branch pipe 55. The third liquid reduction gear 61C is disposed at one end of the other upper inner branch pipe 56, and the fourth liquid reduction gear 61D is disposed at the other end of the other upper inner branch pipe 56.

[0050] A lower outer branch pipe 57 having a length in the same direction as the tank body 53 having a length in the horizontal direction is connected to the upstream end of the other bypass pipe 21b, and one end of the lower outer branch pipe 57 is connected to one lower inner branch pipe 58 having the same configuration as the lower branch pipe 36 described above. Also, the other end of the lower outer branch pipe 57 is connected to the other lower inner branch pipe 59 having the same configuration as the lower branch pipe 36 described above. The lower outer branch pipe 57 is composed of a horizontal pipe section 57a ​​that is exposed to the outside of the tank body 53 and has a length in the same direction as the tank body 53, one upright pipe section 57c that stands up from one end (the left end in Figure 11) of the horizontal pipe section 57a ​​via one curved section 57b, extends from the outside of the tank body 53 into the inside of the tank body 53 and is connected to the center of the one lower inner branch pipe 58, and the other upright pipe section 57e that hangs down from the other end (the right end in Figure 11) of the horizontal pipe section 57a ​​via the other curved section 57d, extends from the outside of the tank body 53 into the inside of the tank body 53 and is connected to the center of the other upper inner branch pipe 59 that has the same configuration as the one lower inner branch pipe 58. The first liquid discharge device 62C is disposed at one end of the one lower inner branch pipe 58, and the second liquid discharge device 62D is disposed at the other end of the one lower inner branch pipe 58. The third liquid discharge device 63A is disposed at one end of the other lower inner branch pipe 59, and the fourth liquid discharge device 62D is disposed at the other end of the other lower inner branch pipe 59.

[0051] In addition, the distance from the first liquid reduction device 61A to the third liquid reduction device 61C and the distance from the first liquid discharge device 62A to the third liquid reduction device 62C are the same as the distance L3 shown in Figure 4.

[0052] Therefore, the horizontal liquid storage tank (buffer tank) 51 according to the second embodiment has the same effects as the horizontal liquid storage tank (buffer tank) 31 according to the first embodiment.

[0053] The horizontal liquid storage tank (buffer tank) of the present invention may be configured like a horizontal liquid storage tank (buffer tank) 71 shown in Fig. 12 or 13, which is more specifically shown than the buffer tank 13 according to the first embodiment described with reference to Fig. 2, 3 or 4, which is somewhat diagrammatically shown. This buffer tank 71 relates to the third embodiment, and includes a tank body 73 having a length in the horizontal direction, an inlet pipe 74 arranged above the center of the tank body 73, and an upper branch pipe 75 connected to the inlet pipe 74. As shown in Fig. 12, the tank body 73 is composed of a cylindrically molded side plate member 73a, one closing member 73b fixed (welded) to one end (left end in Fig. 12) of the side plate member 73a and closing an opening on one side of the side plate member 73a, and the other closing member 73c fixed to the other end (right end in Fig. 12) of the side plate member 73a and closing an opening on the other side of the side plate member 73a. The one closing portion 73b and the other closing portion 73c are each slightly bulged in an arc shape in a direction away from each other (outward) from the outer periphery side to the center side, and the one and other closing portions 73b, 73c are molded symmetrically with the center of the tank body 73 as the boundary. The buffer tank 71 is supported by a plurality of legs 71a, 71b, 71c, and a base end of a liquid discharge pipe 71d, which discharges the liquid in the tank body 73 and has a manual valve (not shown) disposed in its middle, is fixed to the lower end of the side plate member 73a. As shown in Fig. 13, one end of the inflow pipe 74 is connected to an end of one of the bypass pipes 21a described above outside the tank body 73, and its middle portion passes through an opening (reference number omitted) formed in the side plate member 73a and extends horizontally into the tank body 73 from a position slightly above the center (central) of the tank body 73.12, the upper branch pipe 75 is composed of an upper horizontal pipe 75a having a length in the same direction as the length direction of the tank body 73, one upper curved pipe 75b formed at one end of the upper horizontal pipe 75a, the other upper curved pipe 75c formed at the other end of the upper horizontal pipe 75a, one upright pipe section 75d standing upward from the one upper curved pipe 75b, and the other upright pipe section 75e standing upward from the other upper curved pipe 75c. As shown in FIG. 13, the center of the upper horizontal pipe 75a is located slightly above the center of the tank body 73.

[0054] A first liquid reduction device 3A is fixed to the upper end of the one upright tube 75d, and a second liquid reduction device 3B is fixed to the upper end of the other upright tube 75e. Note that the first liquid reduction device 3A and the second liquid reduction device 3B have the same configuration as the first liquid reduction device 1A and the second liquid reduction device 1B described above, and therefore a detailed description thereof will be omitted.

[0055] 12, the tank body 73 includes a discharge pipe 76 disposed at a lower portion within the tank body 73 and a lower branch pipe 77 connected to the discharge pipe 76. As shown in FIG. 13, one end of the discharge pipe 76 is connected to an end of the other bypass pipe 21b outside the tank body 73, and a middle portion of the discharge pipe 76 passes through an opening (reference numeral omitted) formed in the side plate member 73a and extends into the tank body 73 from a position slightly lower than the center (center) of the tank body 73. In other words, the inlet pipe 74 and the outlet pipe 76 are formed to have the same length, and the inlet pipe 74 and the outlet pipe 76 are arranged at positions point-symmetrical to each other. 12, the lower branch duct 77 is composed of a lower horizontal pipe 77a having a length in the same direction as the length direction of the tank main body 73, one lower curved pipe 77b formed at one end of the lower horizontal pipe 77a, the other lower curved pipe 77c formed at the other end of the lower horizontal pipe 77a, one hanging pipe 77d hanging downward from the one lower curved pipe 77b, and the other hanging pipe 77e hanging downward from the other lower curved pipe 77c. Note that flange portions (reference numbers are omitted) are formed at both ends of the lower horizontal pipe 77a, the one lower curved pipe 77b, the other lower curved pipe 77c, the one hanging pipe 77d, and the other hanging pipe 77e constituting the discharge pipe 76, the lower branch duct 77, and are fixed in a state in which the respective flange portions are joined to each other. As shown in FIG. 13, the center of the lower horizontal pipe 77a is located slightly below the center of the tank main body 73.

[0056] A first liquid discharge device 3C is fixed to the lower end of the one of the hanging pipes 77d, and a second liquid discharge device 3D is fixed to the lower end of the other of the hanging pipes 77e. The first liquid discharge device 3C is disposed directly below the first liquid reduction device 3A, and the second liquid discharge device 3D is disposed directly below the second liquid reduction device 3B, and the outer diameter of the first liquid discharge device 3C is formed to be the same as the outer diameter of the first liquid reduction device 3A, and the outer diameter of the second liquid discharge device 3D is formed to be the same as the outer diameter of the second liquid reduction device 3B. Further, the distance L1 from the inner wall surface of one closing portion 73b constituting the tank body 73 to the first liquid reduction gear 3A and the distance L2 from the inner wall surface of the other closing portion 73c constituting the tank body 73 to the second liquid reduction gear 3B are the same distance, and the distance L3 from the first liquid reduction gear 3A to the second liquid reduction gear 3B is twice the distance L1 (L2) from the inner wall surface of the one disc plate member 73b to the first liquid reduction gear 3A. That is, each of the above distances is the same as each distance shown in FIG. 4 showing the first embodiment described above.

[0057] Next, the first and second liquid discharging devices 3C, 3D will be described in detail. As these have the same configuration as described above, the first liquid discharging device 3C will be described in detail below.

[0058] 14, the first liquid discharging device 3C according to this embodiment has an outer diameter dimension of the lower end that is the same as that of the first liquid reduction gear 3A, and has an overall outer shape formed in a truncated cone shape with an inflow space inside whose inner diameter gradually decreases from bottom to top, and is composed of a conical portion 79 having the inflow space therein, a cylindrical portion 80 formed at the top of the conical portion 79 and communicating with the inside of the conical portion 79, and a flange portion 81 formed on the outer periphery of the upper end of the cylindrical portion 80. In the first liquid discharging device 3C, the upper surface of the flange portion 81 is fixed to the lower surface of one of the hanging pipes 77d, and in the second liquid discharging device 3D, the upper surface of the flange portion 81 is fixed to the lower surface of the other of the hanging pipes 77e.

[0059] Therefore, even in the case of a buffer tank 71 having such a configuration, the flow rate of the liquid flowing into the first liquid reduction device 3A fixed to the upper end of the one upright pipe section 75d and the second liquid reduction device 3B fixed to the upper end of the other upright pipe 75e is gradually slowed down and discharged radially from the center of the first and second liquid reduction devices 3A, 3B and to the upper side of the tank main body 31a, and the cooling water at the appropriate temperature stored in the buffer tank 71 due to the pressure flows into the first liquid discharge device 3C and the second liquid discharge device 3D from below (the bottom side of the tank main body 31a) and into the first liquid discharge device 3C and the second liquid discharge device 3D, passes through the lower branch pipe 77 and the discharge pipe 76, flows into the other bypass pipe 21b, and is supplied to the cooled body 14 side. [Explanation of symbols]

[0060] 1A, 1B (First and second) liquid reduction device 2A, 2B (First and second) liquid discharge devices 3A, 3B (First and second) liquid reduction devices 3C, 3D (First and second) liquid discharge devices 3 First decelerating disk 3a First flow opening 4 Second decelerating disk 4a Second flow opening 5. Third decelerating disk 5a Third flow opening 6 Fourth decelerating disk 6a Fourth flow opening 7 Fifth deceleration disk 7a Fifth circulation opening 12 Water cooling equipment 13 Buffer tank (horizontal liquid storage tank) 14 Cooled object 15 Cooling device 16 First pipeline (main pipeline or upstream main pipeline) 17 Second pipeline (downstream pipeline) 18 Manual Valve 21 Bypass Pipe 21a One bypass line 21b The other bypass pipe 22 Pump 29 Side plate part 30 Top plate 30a opening 31 Tank body 31a Side plate part 33 Upper branch pipe 33a Upper horizontal pipe section 33b One upper curved pipe section 33c The other upper curved pipe section 33d One side of the standing pipe 33e The other standing pipe section 36 Lower branch pipe 36a Lower horizontal pipe section 36b One of the lower curved pipe sections 36c The other lower curved pipe section 36d One of the hanging pipes 36e The other hanging pipe section 36e 51 Buffer tank (horizontal liquid storage tank) 53 Tank body 55 One upper inner branch pipe 56 The other upper inner branch pipe 58 One lower inner branch pipe 59 The other lower inner branch pipe 61A, 61B, 61C, 61D First to fourth liquid reduction devices 62A, 62B, 62C, 62D First to fourth liquid discharge devices 71 Horizontal liquid storage tank (buffer tank) 73 Tank body 74 Inflow pipe 75 Upper branch pipe 75a Upper horizontal pipe 75b One upper curved tube 75c The other upper curved tube 75d One side of the standing pipe 75e The other standing pipe 76 Discharge pipe 77 Lower branch pipe 77a Lower horizontal pipe 77b One lower curved tube 77c The other lower curved tube 77d One of the hanging pipes 77e Other down pipe 79 Cone 80 Cylindrical part L1 First distance L2 Second distance L3 Third distance

Claims

1. a liquid storage tank body having a side plate portion formed into a cylindrical shape having a horizontal length; a plurality of liquid deceleration devices each disposed at an upper portion inside the liquid storage tank body, into which liquid supplied from the upstream side into the liquid storage tank body flows and which decelerate the flow rate of the liquid supplied into the liquid storage tank body, and each having an overall outer shape shaped like a cylinder or a truncated cone; a plurality of liquid discharge devices into which liquid at a lower portion of the liquid storage tank body flows and which discharge the liquid that has flowed into the interior of the liquid storage tank body to a downstream side, The liquid reduction device is arranged in parallel at a predetermined interval from each other along the length direction of the liquid storage tank body, and each liquid reduction device is composed of a plurality of reduction disks arranged vertically at a predetermined interval, each of which has a circulation opening formed in its center through which the liquid supplied from the upstream side flows in, the liquid discharge devices are arranged in parallel at predetermined intervals along the length of the liquid storage tank body, and each have a portion having an outer diameter dimension that is the same as an outer diameter dimension of the liquid reduction gear device, The liquid supplied from the upstream side flows into the interior of the liquid reduction device through the flow opening that constitutes each of the liquid reduction devices, and is discharged radially from the liquid reduction device while the flow rate of the liquid is slowed down by the multiple reduction disks, and the liquid flows into the interior from the lower side of the multiple liquid discharge devices in accordance with the discharge pressure from the liquid reduction device, and is discharged to the downstream side from the liquid storage tank main body.

2. 2. The horizontal liquid storage tank according to claim 1, wherein each of the liquid discharge devices has a cylindrical side plate portion, a top plate portion located on the upper part of the side plate portion, and an opening formed in the center of the top plate portion and connected to a pipeline for discharging liquid to the downstream side, or has an outer diameter shaped like a truncated cone and an inflow space inside whose inner diameter gradually decreases from bottom to top, and the liquid below the liquid storage tank body flows in from below the side plate portion or below the inflow space, passes through the pipeline, and is discharged to the downstream side of the liquid storage tank body.

3. Among the plurality of liquid reduction devices, a first distance, which is a distance between one liquid reduction device that is closest to one end of the liquid storage tank body and the one end of the liquid storage tank body, and a second distance, which is a distance between the other liquid reduction device that is closest to the other end of the liquid storage tank body and the other end of the liquid storage tank body, are each set to be equal, A horizontal liquid storage tank as described in claim 1, characterized in that a third distance, which is a distance between the one liquid reduction device and the other liquid reduction device, or a distance between adjacent liquid reduction devices among the plurality of liquid reduction devices, is twice the first distance and the second distance.

4. 4. The horizontal liquid storage tank according to claim 3, wherein each of the plurality of liquid discharge devices is disposed immediately below each of the plurality of liquid deceleration devices.

5. An upper branch pipe into which the liquid supplied from the upstream side flows is disposed within the liquid storage tank body, and the upper branch pipe includes an upper horizontal pipe section having a length in the same direction as the longitudinal direction of the liquid storage tank body, one upper curved section formed at one end of the upper horizontal pipe section, the other upper curved section formed at the other end of the upper horizontal pipe section, one upright pipe section standing upward from the one upper curved section, and the other upright pipe section standing upward from the other upper curved section, and the liquid reduction device is connected to the upper ends of the one upright pipe section and the other upright pipe section, a lower branch pipe line is disposed within the liquid storage tank body, and the lower branch pipe line includes a lower horizontal pipe section having a length in the same direction as the longitudinal direction of the liquid storage tank body, one lower curved section formed at one end of the lower horizontal pipe section, the other lower curved section formed at the other end of the horizontal pipe section, one hanging pipe section hanging downward from the one lower curved section, and the other hanging pipe section hanging downward from the other lower curved section, and the liquid discharge device is connected to the lower ends of the one hanging pipe section and the other hanging pipe section, 5. A horizontal liquid storage tank according to claim 1, 2, 3 or 4, characterized in that the lower horizontal pipe section is disposed directly below the upper horizontal pipe section, and the lower horizontal pipe section and the upper horizontal pipe section are of the same length.

6. A horizontal liquid storage tank as described in claim 5, characterized in that when the upper horizontal pipe section and the multiple liquid reduction devices, as well as the lower horizontal pipe section and the multiple liquid discharge devices, are considered to be one unit, multiple units are arranged within the liquid storage tank body along the longitudinal direction of the liquid storage tank body.

7. a cooling device connected to the object to be cooled via a downstream pipeline and receiving liquid after cooling the object to be cooled and cooling the liquid; an upstream main pipeline connected to the cooling device and supplying the liquid cooled by the cooling device to the object to be cooled and having a manual valve disposed midway; a bypass pipeline formed in a middle of the upstream main pipeline, into which liquid from the cooling device flows when the manual valve is closed and through which liquid flows to the cooled body side, and a liquid storage tank disposed in the middle of the bypass pipeline, 7. A water cooling system, wherein the liquid storage tank is a horizontal liquid storage tank according to any one of claims 1 to 6.

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