JP2008246817A - Method and apparatus for adjusting temperature of drum of track agitator for transporting ready-mixed concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature adjusting method of the drum of a track agitator which minimizes the amount of a medium for performing heat exchange with respect to the drum, avoids the unnecessary reduction of the loading amount of ready-mixed concrete and capable of continuously obtaining an effect for suppressing the rising or dropping of the temperature of the drum, and a drum temperature adjusting apparatus. <P>SOLUTION: A water temperature adjusting device R5, which cools or heats temperature adjusting water being a medium, is provided to a vehicle main body T, a heat exchanger R1 is provided to the drum D, the water stored in a washing water tank C1 is supplied to the heat exchanger R1 as the medium from the forward passage R24 of a duplex rotary joint R2 and the water passed through the heat exchanger R1 is returned to the washing water tank C1 from the return passage R25 of the duplex rotary joint R2 through the temperature adjusting device R5 to be circulated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a truck agitator that accommodates ready-mixed concrete manufactured in a ready-mixed concrete factory in a drum and transports it to a concrete structure construction site (hereinafter referred to as “site”). The present invention relates to a drum temperature adjusting method and a drum temperature adjusting device for the purpose of preventing quality deterioration of ready-mixed concrete in a drum due to wind and snow in winter.

  Typically, ready-mixed concrete produced in a ready-mixed concrete factory is transported to the site in a state of being housed in a drum of a truck agitator. During transport, the temperature of the ready-mixed concrete in the drum rises due to direct sunlight in summer, high outside air temperature, the heat of hydration reaction of the ready-mixed concrete itself, or the temperature of ready-mixed concrete in the drum due to wind and snow in winter and the low outside air temperature. It is required to deliver ready-mixed concrete manufactured with quality within the specified range stipulated by JIS (Japan Industrial Standards), Japan Society of Civil Engineers, and Architectural Institute, etc. while maintaining the quality at the time of manufacture. In addition, the temperature management of ready-mixed concrete in summer and cold is regulated by JIS.

  The relative relationship between the temperature change of the material and the temperature change of the ready-mixed concrete is generally ± 1 ° C with respect to the temperature change of cement ± 8 ° C, water ± 4 ° C, aggregate ± 2 ° C. It is said that. Therefore, during transportation, the temperature of the ready-mixed concrete in the drum rises by several degrees as the material temperature rises due to direct sunlight or high outside air temperature, or due to the hydration reaction of ready-mixed concrete itself, or wind and snow or low outside air temperature. When the temperature of the ready-mixed concrete in the drum decreases by several degrees as the temperature of the material decreases due to the above, the ready-made concrete becomes a temperature outside the range specified by JIS or the like, which may cause quality deterioration.

  Therefore, a method for adjusting the temperature of the ready-mixed concrete by cooling or heating the material in advance before the ready-mixed concrete is manufactured has been considered. However, for example, when a method of pre-cooling the material by watering the coarse aggregate before production of ready-mixed concrete is adopted, naturally, the surface water of the coarse aggregate greatly fluctuates when the water is sprayed. Such a method has not been actively adopted. In addition, when a method other than watering is adopted as a method for precooling or heating the material before production of ready-mixed concrete, the cost burden is large, and a remarkable effect commensurate with the high cost cannot be obtained. The current situation is not.

  On the other hand, it is not a method of pre-cooling or heating the material before production of ready-mixed concrete, but by suppressing the temperature rise or temperature drop of the drum itself, the temperature rise or temperature drop of the ready-mixed concrete in the drum is suppressed and transported A track agitator aimed at preventing the deterioration of the quality of ready-mixed concrete is considered. Hereinafter, some aspects will be described.

  First, Patent Document 1 below discloses a mode in which the outer portion of the drum has a double structure in which a heat insulating material is interposed, thereby suppressing the temperature rise of the drum itself.

  Further, in Patent Document 2 below, the drum is surrounded by a heat insulation box, and cooling air is blown into a space formed between the outer surface portion of the drum and the heat insulation box, thereby suppressing the temperature rise of the drum itself. Is disclosed.

  Patent Document 3 below discloses a mode in which the temperature of the drum itself is suppressed by covering the top of the drum with a cover and spraying cooling water directly onto the drum.

Further, in Patent Document 4 below, a drum is provided by providing a pan below the drum, putting a cooling medium for cooling the lower part of the drum in the pan, and immersing the lower part of the rotating drum in the cooling medium. The aspect which suppresses the temperature rise of this is disclosed.
JP-A-9-277245 JP-A-11-277523 JP 2003-94425 A JP 2006-111150 A

  However, since the aspect described in Patent Document 1 is not an aspect in which the drum is actively cooled or heated, there is a possibility that the temperature control of the drum cannot be performed properly, and the quality of the ready-mixed concrete in the drum is deteriorated. Can be invited.

  Moreover, the aspect of the said patent document 2 and the patent document 3 requires the large sized apparatus which covers a drum, and also must equip the apparatus for supplying cooling air, and the tank for cooling water newly. Therefore, the weight of the entire apparatus for cooling the drum increases, and accordingly, there arises a problem that the loading amount of the ready-mixed concrete decreases. That is, the total vehicle weight (total weight obtained by multiplying the vehicle weight, maximum loading capacity and 55 kilograms of riding capacity) is regulated by the law (Road Transport Vehicle Law), and the large-sized device for adjusting the drum temperature As a matter of course, the weight of the vehicle increases the weight of the vehicle, and as a result, the amount of ready-mixed concrete that can be loaded on the vehicle decreases. This means that the transport efficiency from the ready-mixed concrete factory to the site is deteriorated, which is a fatal problem for the truck agitator that is required to improve the transport efficiency.

  In addition, in the aspect described in Patent Document 4, when the cooling medium that has once exchanged heat with the drum is continuously used as it is, the cooling effect decreases with time, and the temperature of the drum is precisely adjusted. The problem of being unable to do so occurs. On the other hand, in order to continuously obtain the cooling effect, the replacement / replenishment operation is troublesome when the mode of replacing or replenishing the cooling medium that has exchanged heat with the drum is replaced with a new cooling medium. In addition, a large amount of cooling medium is required, resulting in an increase in the weight of the entire vehicle. As a result, the amount of ready-mixed concrete that can be loaded is reduced.

  The present invention has been made paying attention to such problems, and the main purpose is to minimize the amount of medium that exchanges heat with the drum, and unnecessarily reduce the loading amount of ready-mixed concrete. It is an object of the present invention to provide a drum temperature adjusting method and a drum temperature adjusting device capable of avoiding the situation and continuously obtaining the effect of suppressing the temperature rise or temperature drop of the drum.

  That is, the track agitator drum temperature adjusting method according to the present invention comprises a vehicle main body equipped with a drum for transporting ready-mixed concrete, and the vehicle main body is provided with a medium temperature adjusting device for cooling or heating the medium. The drum is provided with a heat exchanger, and the medium whose temperature is adjusted by the medium temperature adjusting device is supplied to the heat exchanger through a double rotary joint having a forward path and a return path and circulated.

  Here, “fresh concrete” in the present invention is a concept that broadly indicates what is transported using a truck agitator as well as fresh concrete in a narrow sense. That is, it is a concept that includes mortar, cement paste, and the like that do not include coarse aggregate.

  With such a drum temperature adjustment method, the temperature of the circulating medium can be precisely managed by the medium temperature adjustment device, and heat exchange with the drum can be performed efficiently over a long period of time. As a result, the temperature rise or temperature drop of the ready-mixed concrete in the drum can be continuously suppressed. Furthermore, in order to circulate the medium temperature-adjusted by the medium temperature adjusting device along the closed loop circulation path using the forward path and the return path of the double rotary joint, the medium exchanged with the drum is a new medium. This not only eliminates the need for replacement or replenishment, but also minimizes the amount of media, contributing to weight reduction. As a result, the effect of suppressing the temperature rise or temperature drop of the drum can be continuously obtained without an unnecessary decrease in the loading amount of the ready-mixed concrete, and the quality deterioration of the ready-mixed concrete during the transportation process can be prevented. it can.

  Also, the drum temperature adjustment method for a track agitator according to the present invention includes a drum for transporting ready-mixed concrete, a cleaning water tank for storing cleaning water, and water in the cleaning water tank for drum cleaning. In addition to providing a heat exchanger in the drum, the water in the cleaning water tank is branched as a medium, and the branched water is compounded. The heat exchanger is supplied to the heat exchanger through the forward path of the rotary joint, and the water that has passed through the heat exchanger is circulated back to the washing water tank through the return path of the double rotary joint.

  With such a drum temperature adjustment method, the temperature of the drum is adjusted using the water stored in the existing washing water tank, so that no dedicated medium is required, and the existing washing temperature is further reduced. Since the temperature of the drum is adjusted using a water tank and pump, the increase in weight can be suppressed as much as possible, the decrease in the loading amount of ready-mixed concrete is minimized, and the ready-mixed concrete in the transportation process Quality degradation can be prevented. In addition, since the water in the washing water tank is circulated along a closed loop circulation path using the forward and return paths of the double rotary joint, a minimum amount of medium can be used, and heat can be transferred to the drum. There is no need to replace or replenish the replaced medium with a new medium.

  A drum temperature adjusting device for a track agitator according to the present invention includes a drum for transporting ready-mixed concrete mounted on a vehicle body, and a medium temperature adjusting device provided on the vehicle body for cooling or heating the medium. A heat exchanger provided on the drum and rotating together with the drum; a non-rotating head having an inlet port and an outlet port; and a forward path for guiding a medium supplied from the inlet port to the injection port of the heat exchanger; A double rotary joint having a return path for guiding the medium discharged from the discharge port of the heat exchanger to the outlet port, and a medium whose temperature is adjusted by the medium temperature adjusting device is supplied to the inlet port of the double rotary joint. And a return pipe for returning the medium discharged from the outlet port of the double rotary joint to the medium temperature adjusting device. That.

  Such a drum temperature adjustment device does not require a large-scale device such as surrounding the drum with a heat insulation box or covering the top of the drum with a cover, as in the prior art. The drum temperature can be adjusted without incurring weight. In addition, the temperature of the circulating medium can be precisely controlled by the medium temperature adjusting device, and heat exchange with the drum can be performed efficiently over a long period of time, and the drum temperature continuously increases or decreases. Can be suppressed. Furthermore, since the medium whose temperature is adjusted by the medium temperature adjusting device is circulated along the closed loop circuit using the forward and return paths of the double rotary joint, the amount of the medium can be minimized and the weight can be reduced. Contribute. As a result, loading a device for adjusting the temperature of ready-mixed concrete in the drum can avoid a situation in which the amount of ready-mixed concrete that can be loaded on the vehicle is reduced. This will not cause a decrease in transport efficiency.

  The drum temperature control device for a track agitator according to the present invention includes a drum for transporting ready-mixed concrete, a cleaning water tank for storing cleaning water, and water for cleaning the drum in the cleaning water tank. And a pump for feeding toward the washing nozzle, the heat exchanger being provided on the drum and rotating together with the drum, and a non-rotating bed having an inlet port and an outlet port. A dual rotary joint having a forward path for guiding the medium supplied from the inlet port to the inlet of the heat exchanger and a return path for guiding the medium discharged from the outlet of the heat exchanger to the outlet port; A medium supply system for supplying water in the washing water tank as a medium to the inlet port of the joint, and the medium discharged from the outlet port of the dual rotary joint to the washing water tank And characterized by being provided with a medium regression pathway to return to.

  With such a drum temperature adjusting device, a dedicated medium becomes unnecessary by using the cleaning water already mounted on the vehicle body as the medium, and the existing tank for cleaning water and pump are replaced with the drum temperature adjusting device. By making it function as a part, the weight of the drum temperature adjusting device can be suppressed as much as possible, and the situation in which the loading amount of ready-mixed concrete is reduced by providing the drum temperature adjusting device can be avoided. Moreover, using the wash water stored in the wash water tank as a medium, the wash water tank, the temperature adjustment water supply system, the double rotary joint forward path, the heat exchanger, the double rotary joint return path, and the temperature control water return system The cooling effect or heating effect on the drum can be continuously obtained by repeatedly circulating the closed channel in the order of the path and the washing water tank.

  In particular, the latter drum temperature adjustment device adjusts the temperature of the temperature adjustment water that circulates through the medium return path, the washing water tank, and the medium supply path and functions as a medium. If it is equipped with an adjusting device, the water circulating along the closed loop circuit can be precisely controlled to a temperature suitable for heat exchange by the medium temperature adjusting device. An increase or a temperature decrease can be suppressed.

  In order to easily switch between the drum cleaning operation and the drum temperature adjustment operation, the medium supply path shuts off water from the pump toward the cleaning nozzle by a switching operation, and a temperature adjustment port. And a pipe for guiding water discharged from the temperature adjustment port of the branch valve to the inlet port of the double rotary joint as water for temperature adjustment.

  As a suitable installation mode of the double rotary joint, there may be mentioned a mode in which it is provided on the output shaft of a drum drive mechanism for driving the drum to rotate.

  In addition, if the heat exchanger is such that a medium flow path is formed between the outer sheet and the inner sheet having high thermal conductivity, and the inner sheet side is attached to the outer peripheral surface of the drum. In addition, the medium flow between the outer sheet and the inner sheet can be suppressed by heat exchange between the medium flowing through the medium flow path and the drum, thereby suppressing the temperature rise or temperature drop of the drum. By forming, the strength of the entire sheet-shaped heat exchanger can be increased. In addition, since the inner sheet that is in contact with the outer peripheral surface of the drum has high thermal conductivity, heat exchange between the medium and the drum can be performed more efficiently, and the cooling effect or heating effect becomes even more prominent. Become. In addition, a drum temperature adjustment device that is relatively lightweight is used instead of a drum temperature adjustment device that significantly increases the weight, as compared to conventional modes such as surrounding the drum with a heat insulating box or covering the top of the drum with a cover. Can be realized.

  In addition, if the heat exchanger is detachable from the drum, the heat exchanger may be used in spring or autumn when the temperature of the ready-mixed concrete in the drum is less likely to increase or decrease due to the outside air temperature. Can be removed from the drum, and the heat exchanger can be easily replaced and maintained. In particular, when the heat exchanger is a substantially sheet-like one, if the heat exchanger is wound around the drum and the end portions of the heat exchanger are fastened via fasteners such as hooks and ropes It is preferable that the heat exchanger can be easily attached to and detached from the drum.

  In order to prevent the deterioration of the quality of the ready-mixed concrete in the drum in both summer and winter, the medium temperature adjusting device may be selectively replaced with a chilled water machine or a hot water machine.

  In the case where the distal end portion of the double rotary joint is positioned in the internal space on the rotation drive end side of the drum, an isolation wall for isolating the internal space and the ready-mixed concrete receiving space for storing ready-mixed concrete is provided in the drum. By providing it, the situation where the double rotary joint is buried in the ready-mixed concrete in the drum is avoided with a simple structure, the double rotary joint performs its function sufficiently, the medium supply to the heat exchanger, and the heat exchanger The medium can be suitably discharged from the medium.

  As described above, according to the present invention, a medium for heat exchange with the drum is circulated along a closed loop circulation path, thereby minimizing the amount of the medium and reducing the loading amount of the ready-mixed concrete. The effect of suppressing the temperature rise or temperature drop of the drum can be continuously obtained without unnecessary reduction, and the quality deterioration of the ready-mixed concrete during the transportation process can be prevented.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the track agitator A according to this embodiment includes a vehicle body T, a drum D for transporting ready-mixed concrete mounted on the vehicle body T, and an input for charging ready-mixed concrete into the drum D. The hopper H is provided, and the ready-mixed concrete manufactured in the ready-mixed concrete factory is transported to the site while being accommodated in the drum D. And when it arrives at a conveyance destination (site), the fresh concrete in the drum D is discharged using the discharge chute S.

  Similar to the conventional track agitator A, the track agitator A is loaded with a drum cleaning device C for cleaning the inside of the drum D after the ready-mixed concrete is discharged. As shown in FIGS. 1 and 2, the drum cleaning device C cleans the water in the cleaning water tank C1, the cleaning nozzle C2 for cleaning the drum D, and the cleaning water tank C1. And a pump C3 for feeding toward the nozzle C2. In the present embodiment, a branch valve R31, which will be described later, is arranged between the pump C3 and the cleaning nozzle C2, and cleaning water delivered from the pump C3 is discharged from the cleaning port R312 of the branch valve R31 and guided to the cleaning nozzle C2. I am doing so. Further, as shown in FIGS. 1 and 2, there is a pipe or pipe between the cleaning water tank C1 and the pump C3, between the pump C3 and the branch valve R31, and between the branch valve R31 and the cleaning nozzle C2. A first pipe P1, a second pipe P2, and a third pipe P3 such as a hose are provided.

  Since the drum D, the charging hopper H, the discharge chute S, the cleaning water tank C1, the cleaning nozzle C2, and the pump C3 are known, detailed description of each part is omitted.

  Therefore, the track agitator A according to this embodiment includes a drum temperature adjusting device R for adjusting the temperature of the drum D in order to adjust the temperature of the ready-mixed concrete in the drum D.

  As shown in FIGS. 1 to 4, the drum temperature adjusting device R includes a washing water tank C <b> 1, a pump C <b> 3, a heat exchanger R <b> 1 provided in the drum D and rotating together with the drum D, an inlet port R <b> 211, and an outlet. A compound rotation that has a port R212 and exhibits a function of supplying a medium (temperature adjusting water) to the heat exchanger R1 and a function of discharging the medium (temperature adjusting water) from the heat exchanger R1. It is discharged from the joint R2, the temperature adjustment water supply system R3 that is a medium supply system that supplies the water in the cleaning water tank C1 to the inlet port R211 as temperature adjustment water, and the outlet port R212. The temperature adjustment water return path R4 is a medium return path for returning the water to the wash water tank C1.

  The washing water tank C1 and the pump C3 are already installed in the track agitator A as described above. In this embodiment, the washing water tank C1 and the pump C3 constituting a part of the drum washing apparatus C are replaced with the drum temperature. It functions as a part of the adjusting device R.

  As shown in FIG. 3, which is a principle explanatory view, the heat exchanger R1 is a sheet-like sheet including an outer sheet R11, an inner sheet R12, and an intermediate layer R13 formed between the outer sheet R11 and the inner sheet R12. Is.

  The outer sheet R11 is made of a sheet having excellent heat insulating properties.

  The inner sheet R12 is made of a highly heat conductive sheet.

  As shown in FIGS. 3 and 4, the intermediate layer R <b> 13 includes a temperature adjustment water flow path R <b> 131 that is a medium flow path through which temperature adjustment water that is a medium can flow, and an air retention portion R <b> 132 that retains air. ing.

  The temperature adjusting water flow path R131 is obtained by extending a belt-shaped passage around the entire intermediate layer R13. An inlet port R131a for injecting temperature adjusting water into the temperature adjusting water channel R131 is formed at one end of the temperature adjusting water channel R131, and temperature adjusting water is supplied to the other end of the temperature adjusting water channel. A discharge port R131b for discharging to the outside of R131 is formed. The path length and the path diameter of the temperature adjusting water flow path R131 are not particularly limited. In this embodiment, for example, the capacity of the cleaning water tank C1 is 200 liters, and the cleaning water tank is adjusted when the temperature of the drum D is adjusted. The path length and the channel diameter of the temperature adjusting water channel R131 are set so that 50 liters or more of water is always stored in C1.

  The air retention part R132 is formed in a region of the intermediate layer R13 where the temperature adjusting water channel R131 is not formed. An air injection port R132a for injecting air into the air retention portion R132 is formed at a predetermined location of the intermediate layer R13. A cap (not shown) that prevents the air injected into the air retention portion R132 from leaking outside is detachably attached to the air injection port R132a.

  In the present embodiment, as shown in FIG. 1, in the state where the heat exchanger R <b> 1 is attached to the outer peripheral surface of the drum D, the temperature adjustment water flow path R <b> 131 and the air retention portion R <b> 132 are alternately arranged along the axial direction of the drum D. The layout of the temperature adjustment water flow path R131 and the air retention part R132 is set so as to be aligned. In addition, in FIG. 1, the temperature adjustment water flow path R131 which is invisible or difficult to visually recognize from the outside is shown with a pattern.

  The heat exchanger R1 applied in the present embodiment has a developed shape shown in FIG. Specifically, a center shell covering portion R1A capable of covering a substantially cylindrical center shell D1 (see FIG. 1) of the drum D, and a position sandwiching the center shell covering portion R1A, and the drum D Of these, a front shell covering portion R1B and a rear shell covering portion R1C that respectively cover the substantially conical front shell D2 and rear shell D3 are integrally provided. In FIG. 5, for convenience of explanation, the temperature adjustment water flow path R131 that is invisible or difficult to view in the unfolded state is indicated by a solid line.

  In such a state where the heat exchanger R1 is wound around the outer peripheral surface of the drum D, the ends of the heat exchanger R1 (for example, ends having the same reference numerals in FIG. 5) are hooked. The heat exchanger R1 can be attached to the outer peripheral surface of the drum D by fastening using a fastener (not shown) such as a rope or rope.

  When such a heat exchanger R1 is attached to the outer peripheral surface of the drum D, as shown in FIG. 1, the temperature adjusting water flow path R131 and the air staying portion R132 are provided on the outer peripheral surface of the drum D, particularly the front shell. The outer peripheral surfaces of D2, the center shell D1, and the rear shell D3 are set so as to be continuously wound. In the present embodiment, the injection port R131a and the discharge port R131b formed at both ends of the temperature adjusting water flow path R131 are formed in the front shell covering portion R1B (see FIG. 5).

  The heat exchanger R1 having such a configuration is attached to the drum D in a state where the inner sheet R12 is in contact with the outer peripheral surface of the drum D. When the drum D is rotated in this attached state, the thickness dimension of the entire heat exchanger R1 is set so that the heat exchanger R1 does not come into contact with other members or equipment.

  The double rotary joint R2 is attached to a drum drive mechanism E for rotating the drum D as shown in FIGS.

  The drum drive mechanism E includes a hydraulic motor E1 and a speed reducer E2. In this embodiment, the drum motor E1 is arranged in parallel with the speed reducer E2. The arrangement position of the hydraulic motor E1 may be above the speed reducer E2 or may be on the side. The reduction gear E2 has an output shaft E3 therein, and an output flange E4 is provided at the tip of the output shaft E3 via a spline joint E31. The output shaft E3 and the drum D are connected to each other by joining the output flange E4 to a mounting portion D4 of the rotational drive end of the drum D with a screw or the like (not shown). Therefore, when the output shaft E3 rotates by the output from the hydraulic motor E1, the entire drum D rotates in synchronization with the output shaft E3, and the ready-mixed concrete accommodated in the drum D is agitated. Note that the spline joint E31 provided at the tip of the output shaft E3 is such that the tip of each tooth E31a is set in a partial arc shape, and an output flange attached to the output shaft E3 via such a gear E31. E4 can swing with respect to the output shaft E3 (see FIG. 7). The drum drive mechanism E is supported in a posture inclined by a predetermined angle by the support B, and when normal, the axis of the drum D and the axis of the output shaft E3 are positioned on substantially the same straight line.

  Thus, in the present embodiment, a hollow portion E32 extending along the axial direction and allowing the double rotary joint R2 to be inserted is formed inside the output shaft E3.

  The double rotary joint R2 includes a non-rotating head R21 having an inlet port R211 and an outlet port R212, an inner pipe R22 and an outer pipe R23 that are rotatably supported by the non-rotating head R21 at one end side, and an inlet port R211. A forward path R24 that guides the supplied temperature adjusting water to the injection port R131a of the heat exchanger R1 using the hollow path R221 of the inner pipe R22 (hereinafter referred to as “first hollow path R221”), and the heat exchanger R1 Provided with a return path R25 for guiding water for temperature adjustment discharged from the discharge port R131b to the outlet port R212 using a hollow path R231 (hereinafter referred to as "second hollow path R231") of the outer pipe R23. It is.

  Inside the non-rotating head R21, an inlet side connection pocket R213 that communicates with the inlet port R211 and an outlet side connection pocket R214 that communicates with the outlet port R212 are formed.

  The inner pipe R22 has a substantially cylindrical shape, and an opening on one end side communicates with the inlet port R211 via the inlet side connection pocket R213, and an opening on the other end is finally an injection port of the heat exchanger R1. The first hollow path R221 communicates with R131a. The inlet side connection pocket R213 and the first hollow path R221 form the forward path R24 that guides the temperature adjusting water supplied from the inlet port R211 to the injection port R131a of the heat exchanger R1. In the present embodiment, the non-rotating head R21 is provided with a first bearing R215 that rotatably supports the inner tube R22.

  The outer tube R23 has a substantially cylindrical shape, and an opening on one end side communicates with the outlet port R212 via the outlet side connection pocket R214 between the inner surface portion thereof and the outer surface portion of the inner tube R22. A second hollow path R231 whose opening finally communicates with the discharge port R131b of the heat exchanger R1 is formed. In the present embodiment, the opening on the one end portion side of the second hollow path R231 is set in a conical shape having a gradually increasing opening diameter toward the opening edge. The second hollow path R231 and the outlet side connection pocket R214 form the return path R25 that guides the temperature adjusting water discharged from the discharge port R131b of the heat exchanger R1 to the outlet port R212. In the present embodiment, the non-rotating head R21 is provided with a second bearing R216 and a third bearing R217 that rotatably support the outer tube R23. Further, the outlet side connection pocket is formed by the first seal ring RS1 disposed on one end side of the inner tube R22 and the second seal ring RS2 disposed on one end portion side of the outer tube R23 and pressed in a predetermined direction by the spring RSP. R214 is sealed.

  As shown in FIGS. 6 and 7, the other end portions of the inner tube R22 and the outer tube R23 are positioned in the internal space DS1 on the rotational drive end side of the drum D, and the drum body joint J disposed in the internal space DS1 is used. It is connected to the. The drum body joint J includes an outward connection port J1 that communicates with an outward path R24 (specifically, an opening on the other end side of the first hollow path R221 of the inner pipe R22) and a return path R25 (specifically, the first path of the outer pipe R23). 2 is provided in the internal space DS1 on the rotation driving end side of the drum D so as not to be rotatable. A fourth pipe P4 such as a pipe or a hose is provided between the forward connection port J1 and the injection port R131a of the heat exchanger R1, and between the return connection port J2 and the discharge port R131b of the heat exchanger R1. Five pipe lines P5 are arranged (see FIGS. 6 and 7). The fourth pipe P4 and the fifth pipe P5 are extended from the internal space DS1 on the rotation driving end side of the drum D to the outside of the drum D, and the inner sheet R12 is attached to the outer peripheral surface of the drum D. Of the heat exchanger R1 attached in the above state, the heat exchanger R1 is connected to the injection port R131a and the discharge port R131b. The fourth pipe P4 and the fifth pipe P5 are respectively connected to the injection port R131a or the discharge port R131b of the heat exchanger R1 through a coupling such as a coupler (not shown).

  Further, as shown in FIG. 6, ready-mixed concrete that accommodates ready-mixed concrete and internal space DS <b> 1 in which the other end side of the inner pipe R <b> 22 and the outer pipe R <b> 23, i.e., the tip of the double rotary joint R <b> 2, is positioned inside the drum D. An isolation wall D5 for separating the accommodation space DS2 is provided.

  On the other hand, the temperature adjustment water supply system R3 for supplying the water in the cleaning water tank C1 to the inlet port R211 of the double rotary joint R2 pumps the water sent from the pump C3 by switching operation as shown in FIG. A branch valve R31 that shuts off water from C3 to the cleaning nozzle C2 and guides it to the temperature adjustment port R311; and a double rotary joint R2 using water discharged from the temperature adjustment port R311 of the branch valve R31 as temperature adjustment water And a sixth pipe P6 that is a forward pipe such as a pipe or a hose that guides to the inlet port R211.

  The branch valve R31 includes a temperature adjustment port R311 and a washing port R312. The first valve opened state for washing water sent from the pump C3 to the temperature adjustment port R311 by electric or manual operation, and washing It can be switched between the second valve open state led to the port R312. The branch valve R31 positively functions as part of the temperature adjustment water supply path R3 when in the first valve open state.

  Furthermore, the drum temperature adjusting device R according to the present embodiment includes a temperature adjusting water circulating through the temperature adjusting water return path R4, the washing water tank C1, and the temperature adjusting water supply path R3. A water temperature adjusting device R5, which is a medium temperature adjusting device for adjusting the temperature, is provided.

  The water temperature adjusting device R5 forcibly adjusts the temperature of the temperature adjusting water discharged from the outlet port R212 of the double rotary joint R2 within a predetermined numerical value. In the present embodiment, a chilled water machine or a hot water machine can be selectively replaced and used as the water temperature adjusting device R5. The cold water machine and the hot water machine can be driven by an automobile power source.

  In the drum temperature adjusting device R according to the present embodiment, such a water temperature adjusting device R5 is provided in the temperature adjusting water return path R4. Specifically, this water temperature adjusting device R5 is arranged downstream of the outlet port R212 of the double rotary joint R2. And as shown in FIG.1 and FIG.2, the piping which returns the water for temperature adjustment discharged from exit port R212 to water temperature adjustment apparatus R5 between exit port R212 of double rotary joint R2 and water temperature adjustment apparatus R5 Alternatively, a seventh pipe P7 that is a return pipe such as a hose is provided. Further, an eighth pipe P8 such as a pipe or a hose is disposed between the water temperature adjusting device R5 and the washing water tank C1. Therefore, the water for temperature adjustment discharged from the outlet port R212 of the double rotary joint R2 is guided in the order of the seventh pipe P7, the water temperature adjusting device R5, and the eighth pipe P8, and returns to the washing water tank C1. . That is, the temperature adjustment water return path R4 in the present embodiment is configured by the seventh pipeline P7, the water temperature adjustment device R5, and the eighth pipeline P8. In addition, the 7th pipe line P7 and the 8th pipe line P8 are each connected to the water temperature adjustment apparatus R5 via couplings, such as a coupler which is not shown in figure. As a result, replacement work between the cold water heater and the hot water machine, or removal work of the water temperature adjusting device R5 when not in use or during maintenance can be easily performed.

  Next, the operation of the drum temperature adjusting device R having such a configuration will be described along a circulation path of temperature adjusting water that is a medium.

  When transporting ready-mixed concrete manufactured in a ready-mixed concrete plant to the site while being accommodated in the drum D, the drum D is rotated forward in order to agitate the ready-mixed concrete in the drum D, and the branch valve R31 is connected to the first valve. 2. The valve opening state (state in which water sent from the pump C3 is led to the washing port R312) is switched to the first valve opening state (state in which water sent from the pump C3 is led to the temperature adjustment port R311).

  In this state, by driving the pump C3, the water in the cleaning water tank C1 moves the first pipe P1, the pump C3, the second pipe P2, the branch valve R31, and the sixth pipe P6 in this order. Pass by. The temperature adjusting water that is sent to the branch valve R31 through the second pipe P2 by the pump C3 is guided to the temperature adjusting port R311 of the branch valve R31, and the sixth rotary joint R2 of the double rotary joint R2 is sent by the sixth pipe P6. Guided to the inlet port R211.

  The temperature adjusting water guided to the inlet port R211 passes through the forward path R24 including the inlet side connection pocket R213 and the first hollow path R221 of the inner pipe R22, and then continues from the forward path connection port J1 of the drum body joint J to the fourth. It is guided to the pipe line P4 and flows toward the injection port R131a of the heat exchanger R1. Then, the temperature adjustment water introduced from the injection port R131a into the temperature adjustment water flow path R131 flows so as to wind most of the outer peripheral surface of the drum D along the temperature adjustment water flow path R131. Exchange heat with As a result, the outer peripheral surface of the drum D is cooled or heated, and the temperature rise or temperature drop of the drum D itself is suppressed. Further, since the inner sheet R12 of the heat exchanger R1 has high thermal conductivity, heat exchange between the temperature adjustment water flowing through the temperature adjustment water passage R131 and the drum D is performed efficiently. Furthermore, since the outer sheet R11 of the heat exchanger R1 has a heat insulating property, the heat exchange effect generated between the temperature adjustment water flowing through the temperature adjustment water flow path R131 and the drum D is greatly increased by the outside air temperature. It is possible to suppress the situation of being affected as much as possible.

  Further, the air staying in the air staying section R132 that is wound around the outer peripheral surface of the drum D along the axial direction alternately with the temperature adjusting water flow path R131 is also cooled or heated by the temperature adjusting water. That is, the air retention portion R132 functions as a means for cooling or heating the outer peripheral surface of the drum D by circulating the temperature adjustment water through the temperature adjustment water flow path R131 in a state where air is retained in the air retention portion R132. To do.

  The temperature adjusting water that has passed through the temperature adjusting water flow path R131 is guided from the discharge port R131b of the heat exchanger R1 to the return connection port J2 of the drum body joint J through the fifth pipe P5, and the outer pipe R23. After passing through the return path R25 composed of the second hollow path R231 and the outlet side connection pocket R214, it is discharged from the outlet port R212 of the double rotary joint R2.

  The temperature adjusting water discharged from the outlet port R212 returns to the washing water tank C1 through the temperature adjusting water return path R4. The temperature adjusting water discharged from the outlet port R212 is heated or lowered with respect to the state before being supplied to the heat exchanger R1 due to heat exchange with the drum D. Yes. Therefore, in the present embodiment, in the process of sending out such temperature adjusting water toward the washing water tank C1, the water temperature adjusting device R5 is led by the seventh pipe P7 connected to the outlet port R212, and the water temperature Cooling or heating to a predetermined temperature with the adjusting device R5. The water cooled or heated by the water temperature adjusting device R5 is guided to the washing water tank C1 through the eighth pipe P8. In this way, the water guided to the washing water tank C1 is again supplied to the washing water tank C1, the temperature adjustment water supply system path R3, the forward path R24 of the double rotary joint R2, the heat exchanger R1, and the double rotary joint R2. The return path R25, the temperature adjustment water return path R4, and the washing water tank C1 are circulated in this order, and heat is exchanged with the drum D. As a result, the temperature rise or temperature drop of the drum D itself is suppressed, and quality deterioration of the ready-mixed concrete in the drum D can be avoided.

  As described above, the drum temperature adjusting method for the track agitator A according to the present embodiment is provided with the water temperature adjusting device R5 for adjusting the temperature adjusting water, which is a medium, in the vehicle body T, and the drum D with the heat exchanger. R1 is provided, and the temperature adjusting water whose temperature is adjusted by the water temperature adjusting device R5 is supplied to the heat exchanger R1 through the double rotary joint R2 having the forward path R24 and the return path R25, and is circulated. By circulating the temperature-adjusting water along the closed-loop circuit without being exposed to the atmosphere, the temperature-adjusting water can be supplied in a minimum amount, contributing to weight reduction. Further, the temperature of the circulating temperature adjusting water can be precisely controlled by the water temperature adjusting device R5. By supplying the water adjusted to a predetermined temperature to the heat exchanger R1 via the forward path R24, the drum D As a result, the temperature rise or temperature drop of the ready-mixed concrete in the drum D can be suppressed for a long time.

  Further, since the cleaning water stored in the existing cleaning water tank C1 is used as a medium, not only a dedicated medium becomes unnecessary, but also the existing cleaning water tank C1 and the pump C3 are used. Since the temperature of the drum D is adjusted, it is possible to adjust the temperature of the drum without significantly increasing the weight as compared with the conventional mode in which the drum is surrounded by a heat insulating box or the upper part of the drum is covered with a cover. The temperature can be adjusted.

  Because of this method, the measures to adjust the temperature of the drum D were taken, so that the situation that the amount of ready-mixed concrete that can be loaded on the vehicle body T is reduced is avoided and the ready-mixed concrete plant is moved to the site. This will not cause a decrease in transport efficiency.

  Further, since the temperature adjustment water is circulated along the closed loop circulation path, the temperature adjustment water can be circulated only by the delivery action of the existing pump C3, and the temperature adjustment water is circulated. Therefore, it is not necessary to provide a dedicated auxiliary pump separately, the number of parts can be reduced, and an unnecessary increase in weight can be avoided.

  Further, the drum temperature adjusting device R of the track agitator A according to the present embodiment includes a water temperature adjusting device R5 that cools or heats temperature adjusting water that is a medium, and a heat exchanger that is provided in the drum D and rotates together with the drum D. R1, a non-rotating head R21 having an inlet port R211 and an outlet port R212, and a forward path R24 for guiding water for temperature adjustment supplied from the inlet port R211 to an injection port R131a of the heat exchanger R1 and its heat exchanger Temperature adjustment is performed by a water temperature adjusting device R5 on the double rotary joint R2 having a return path R25 for guiding water for temperature adjustment discharged from the discharge port R131b of R1 to the outlet port R212, and the inlet port R211 of the double rotary joint R2. Is discharged from the sixth pipe P6 for supplying the temperature adjusting water and the outlet port R212 of the double rotary joint R2. Water for degree adjustment is obtained by and a seventh conduit P7 back to water temperature adjustment device R5. Therefore, by circulating the temperature adjustment water along the closed loop circuit, the temperature adjustment water, which is a medium, can be supplied with a minimum amount, contributing to the weight reduction of the entire drum temperature device R. In addition, the temperature of the drum D can be adjusted without incurring the weight of the drum temperature adjusting device R.

  Moreover, the circulating water can be precisely managed at a temperature suitable for heat exchange by the water temperature adjustment device R5, and the temperature rise or temperature drop of the drum D can be suppressed over a long period of time, and the fresh concrete in the drum D can be controlled. Quality degradation can be prevented.

  In particular, since the washing water already mounted on the vehicle body T is used as a medium, a dedicated medium is not necessary. In addition, since the drum temperature adjusting device R is configured using the existing cleaning water tank C1 and pump C3, the number of parts can be effectively reduced and the weight of the entire drum temperature adjusting device R can be reduced. Therefore, the load of ready-mixed concrete is not reduced, and it is highly practical.

  The temperature adjustment water supply system R3 discharges from the branch valve R31 that shuts off the water from the pump C3 to the cleaning nozzle C2 by the switching operation and leads to the temperature adjustment port R311 and the temperature adjustment port R311 of the branch valve R31. Since the water to be adjusted is provided with a sixth pipe P6 that guides the water as temperature adjusting water to the inlet port R211 of the double rotary joint R2, the cleaning water tank C1 is simply switched to the branch valve R31. Either the stored water can be used as washing water or the temperature adjustment water can be selected, and the drum cleaning operation and the drum temperature adjustment operation can be easily switched. it can.

  In addition, the heat exchanger R1 has a temperature adjusting water flow path R131 formed between the outer sheet R11 and the inner sheet R12 having high thermal conductivity, and the inner sheet R12 side is formed on the outer peripheral surface of the drum D. The temperature adjustment water flowing through the temperature adjustment water flow path R131 can be prevented from increasing the temperature of the drum D by exchanging heat with the drum D because of the contact. By forming the temperature adjusting water flow path R131 between the outer sheet R11 and the inner sheet R12, the strength of the entire sheet-shaped heat exchanger R1 can be increased. Furthermore, since the inner sheet R12 that is brought into contact with the outer peripheral surface of the drum D has high thermal conductivity, heat exchange between the water for temperature adjustment and the drum D can be performed efficiently. The cooling effect or heating effect on the ready-mixed concrete in the drum D becomes even more remarkable.

  In particular, since the heat exchanger R1 can be attached to and detached from the drum D, heat exchange is performed in spring and autumn when the temperature of the ready-mixed concrete in the drum D is not easily raised or lowered due to the outside air temperature. The apparatus R1 can be removed from the drum D, and the heat exchanger R1 replacement work and maintenance work can be easily performed. In the present embodiment, a mode in which the ends of the heat exchanger R1 are fastened to each other via fasteners (not shown) such as hooks and ropes in a state where the heat exchanger R1 having a substantially sheet shape is wound around the drum D is adopted. Therefore, the attachment / detachment work of the heat exchanger R1 with respect to the drum D can be performed easily and accurately.

  Further, since the chiller or the hot water machine can be selectively replaced and used as the water temperature adjusting device R5, the temperature rise or temperature drop of the drum D can be suppressed in both summer and winter, and the life in the drum D can be reduced. It is possible to prevent deterioration of the quality of concrete.

  Further, the distal end portion of the double rotary joint R2 is positioned in the internal space DS1 on the rotational drive end side of the drum D, and the internal space DS1 and the ready-mixed concrete storage space DS2 for storing ready-mixed concrete are isolated in the drum D. Since the separating wall D5 is provided, the double rotary joint R2 is buried in the ready-mixed concrete in the drum D, and a situation where the function of the double rotary joint R2 is deteriorated can be avoided with a simple structure.

  The present invention is not limited to the embodiment described in detail above.

  For example, instead of the double rotary joint R2 shown in the above embodiment, the double rotary joint XR2 shown in FIGS. 8 and 9 may be applied. In FIG. 8, for convenience of explanation, only the double rotary joint XR2 is shown as a cross-sectional view. Moreover, in the following description and FIGS. 8-10, the part corresponding to each part shown by the said embodiment is each shown by attaching | subjecting "X" to the head of a code | symbol.

  This double rotary joint XR2 is supported in a state sandwiched between the mounting portion XD4 on the rotational drive end side of the drum XD and the output flange XE4, and is rotatable with the drum XD. A stationary ring XR21 which is a non-rotating head fitted to XR22 is provided.

  The stationary ring XR21 has an inlet port XR211 and an outlet port XR212, an inlet side connection pocket XR213 communicating with the inlet port XR211 and an outlet side connection pocket XR214 communicating with the outlet port XR212. Between the inlet port XR211 and the temperature adjustment port XR311 of the branch valve XR31, an outgoing line that guides the water discharged from the temperature adjustment port XR311 to the inlet port XR211 of the duplex rotary joint R2 as temperature adjustment water The sixth pipe XP6 is arranged through a joint such as a coupler. Further, a seventh pipe line XP7, which is a return pipe for returning the water discharged from the outlet port XR212 to the water temperature regulator XR5, is arranged between the outlet port XR212 and the water temperature regulator XR5 via a joint such as a coupler. ing. In the present embodiment, the stationary ring XR21 is provided with a retaining portion XR215 that prevents the fitting state between the rotating ring XR22 and the stationary ring XR21 from being released.

  The rotation ring XR22 has a first hollow passage XR221 whose opening on one end side communicates with the inlet port XR211 via the inlet side connection pocket XR213 and whose opening on the other end side communicates with the injection port XR131a of the heat exchanger XR1. . The inlet side connection pocket XR213 and the first hollow path XR221 form an outward path XR24 that guides the temperature adjusting water supplied from the inlet port XR211 to the injection port XR131a of the heat exchanger XR1. The opening on the other end side of the first hollow path XR221 functions as an outbound connection port XR24a, and a fourth conduit XP4 such as a pipe or a hose is provided between the outbound path connection port XR24a and the injection port XR131a of the heat exchanger XR1. It is arranged through a joint such as a coupler.

  Further, the rotation ring XR22 has an opening on one end side communicating with the outlet port XR212 via the outlet side connection pocket XR214, and an opening on the other end side communicating with the discharge port XR131b of the heat exchanger XR1. Is formed. The second hollow path XR222 and the outlet side connection pocket XR214 form a return path XR25 that guides water for temperature adjustment discharged from the discharge port XR131b of the heat exchanger XR1 to the outlet port XR212. The opening on the other end side of the second hollow path XR222 functions as a return path connection port XR25a. Between the return path connection port XR25a and the discharge port XR131b of the heat exchanger XR1, a fifth pipe XP5 such as a pipe or a hose is provided. It is arranged through a joint such as a coupler.

  A plurality of seal rings XRS are interposed between the rotating ring XR22 and the stationary ring XR21, and the inlet side connection pocket XR213 and the outlet side connection pocket XR214 are respectively sealed by the seal ring XRS.

  Accordingly, when the drum drive mechanism XE is operated to rotate the drum XD, the rotation ring XR22 also rotates in synchronization with the water in the cleaning water tank XC1, as shown in FIG. It is guided to the temperature adjusting port XR311 of the branch valve XR31 and guided to the inlet port XR211 of the double rotary joint XR2 by the sixth pipe line XP6.

  The temperature adjusting water guided to the inlet port XR211 passes through the forward path XR24 including the outlet side connection pocket XR214 and the second hollow path XR222, and is injected from the forward path connection port XR24a into the fourth pipe line XP4 and the heat exchanger XR1. It is guided to the temperature adjusting water flow path XR131 through the port XR131a. The temperature adjustment water that has passed through the temperature adjustment water flow path XR131 is discharged from the discharge port XR131b of the heat exchanger XR1, passes through the fifth pipe line XP5, the return connection port XR25a, and the second hollow path XR222 and the outlet side It is guided to the return path XR25 including the connection pocket XR214 and discharged from the outlet port XR212 of the double rotary joint XR2. The temperature adjustment water discharged from the outlet port XR212 returns to the wash water tank XC1 through the temperature adjustment water return system XR4, as in the above embodiment. In this way, the water guided to the cleaning water tank XC1 is again supplied to the cleaning water tank XC1, the temperature adjustment water supply system XR3, the outward path XR24 of the double rotary joint XR2, the heat exchanger XR1, and the double rotary joint XR2. The return path XR25, the temperature adjustment water return path XR4, and the washing water tank XC1 are circulated in this order, and heat is exchanged with the drum XD. As a result, the temperature rise or temperature drop of the drum XD itself is suppressed, and quality deterioration of the ready-mixed concrete in the drum XD can be avoided.

  In addition, when this double rotary joint XR2 is applied, it is not necessary to form the hollow portion E32 shown in the above embodiment on the output shaft (not shown). Further, since all the parts of the double rotary joint XR2 are arranged outside the drum XD, it is not necessary to provide the isolation wall D5 shown in the above embodiment on the drum XD.

  Even with the drum temperature adjusting device XR using such a double rotary joint R2, it is possible to obtain substantially the same effect as the drum temperature adjusting device R shown in the embodiment.

  In addition, when the output shaft of the drum drive mechanism has a hollow portion communicating in the axial direction, the outer peripheral surface of the double rotary joint in a state where a portion other than the non-rotating head of the double rotary joint is inserted into the hollow portion. It is also possible to form a flow path through which the medium can circulate between the inner surface of the hollow portion and to function as a part of the forward path or the return path.

  Moreover, the following aspects are also mentioned as another modification.

  For example, the drum cleaning operation and the drum temperature can be performed by selectively connecting either the pipe connected to the cleaning nozzle or the pipe connected to the double rotary joint to the discharge port of the pump without using a branch valve. You may employ | adopt the aspect which enables switching with adjustment work, or the aspect which connects the pipe line connected to the double type rotary joint to the front-end | tip of a washing nozzle at the time of temperature adjustment work.

  Moreover, the aspect using a dedicated medium may be sufficient instead of using existing washing water as a medium. Even in such a case, the temperature of the drum can be adjusted by a minimum amount by circulating the medium in a closed loop circuit, and a large increase in weight is caused by applying a dedicated medium. The trouble of doing can be avoided.

  Furthermore, the medium temperature adjusting device may be arranged at a place other than the medium return path.

  Alternatively, the hydraulic motor and the speed reducer of the drum drive mechanism may be arranged linearly along the axial direction of the output shaft, and a double rotary joint may be provided on the output shaft provided across the hydraulic motor and the speed reducer. Further, a double rotary joint may be provided on the output shaft provided only in the hydraulic motor.

  Moreover, you may apply the general | schematic sheet-like thing which makes the expansion | deployment shape shown in FIG. 11 as a heat exchanger. Even in such a heat exchanger YR1, the ends of the heat exchanger YR1 (ends denoted by the same reference numerals in FIG. 11) are wound around a drum (not shown), such as a hook or a rope. By fastening using a fastener (not shown), the heat exchanger YR1 can be easily and accurately attached to the outer peripheral surface of the drum. In addition, FIG. 11 shows only the external appearance shape of the heat exchanger YR1, and details are omitted.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The figure which abbreviate | omits a part of side surface of the track agitator which concerns on one Embodiment of this invention, and shows typically. The figure which shows typically the circulation path of the water for temperature control in the drum temperature control apparatus which concerns on the same embodiment. The principle figure of the heat exchanger which concerns on the same embodiment. The figure which shows the xx line cross section of FIG. 3 typically. The figure which shows typically the expansion | deployment state of the heat exchanger which concerns on the same embodiment. FIG. 2 is a partially cutaway view of the main part of FIG. 1. The figure which shows typically the cross section of the compound rotary joint which concerns on the same embodiment. FIG. 7 is a view showing a modification of the double rotary joint according to the embodiment substantially corresponding to FIG. 6. The principal part enlarged view of FIG. The figure which shows typically the circulation path of the water for temperature control in the drum temperature control apparatus using the double type | mold rotary joint which concerns on the modification. The figure which shows the modification of the heat exchanger which concerns on the embodiment substantially corresponding to FIG.

Explanation of symbols

A ... Track agitator C1, XC1 ... Wash water tank C2, XC2 ... Wash nozzle C3, XC3 ... Pump D, XD ... Drum DS1 ... Internal space DS2 ... Raw concrete storage space D5 ... Isolation wall E ... Drive mechanism E3 ... Output shaft R1, XR1, YR1 ... heat exchanger R11 ... outer sheet R12 ... inner sheet R131, XR131 ... medium flow path (temperature adjustment water flow path)
R131a, XR131a ... injection port R131, XR131 ... discharge port R24, XR24 ... outward R25, XR25 ... return R2, XR2 ... double rotary joint R21, XR21 ... non-rotating head (stationary ring)
R211, XR211 ... Inlet port R212, XR212 ... Outlet port R3, XR3 ... Medium supply system (temperature adjustment water supply system)
R31, XR31: Branch valve R311, XR311: Temperature adjustment port R4, XR4: Medium return path (temperature adjustment water return path)
R5, XR5: Medium temperature adjusting device (water temperature adjusting device)
P6, XP6 ... Outward pipeline (sixth pipeline)
P7, XP7 ... Return pipeline (seventh pipeline)
T ... Vehicle body

Claims (11)

A drum temperature adjustment method for a truck agitator in which a drum for carrying ready-mixed concrete is mounted on a vehicle body,
A medium temperature adjusting device for cooling or heating the medium is provided in the vehicle main body, a heat exchanger is provided in the drum, and a rotary rotary joint having a medium adjusted in temperature by the medium temperature adjusting device and having a forward path and a return path is provided. A method for adjusting the drum temperature of a truck agitator for transporting ready-mixed concrete, wherein the drum is supplied and circulated through the heat exchanger. The vehicle body is equipped with a drum for transporting ready-mixed concrete, a cleaning water tank for storing cleaning water, and a pump for sending water in the cleaning water tank toward a cleaning nozzle for cleaning the drum. A drum temperature adjustment method for a track agitator,
The drum is provided with a heat exchanger, and the water in the washing water tank is branched as a medium, and the branched water is supplied to the heat exchanger through the outward path of the double rotary joint and passes through the heat exchanger. A method for adjusting the drum temperature of a truck agitator for transporting ready-mixed concrete, wherein the water is circulated back to the washing water tank through a return path of the double rotary joint. A drum temperature adjusting device for a truck agitator, in which a drum for carrying ready-mixed concrete is mounted on a vehicle body,
A medium temperature adjusting device provided in the vehicle body for cooling or heating the medium;
A heat exchanger provided on the drum and rotating together with the drum;
A non-rotating head having an inlet port and an outlet port, a forward path for guiding a medium supplied from the inlet port to an injection port of the heat exchanger and a medium discharged from the discharge port of the heat exchanger to the outlet port A double rotary joint having a return path for guiding;
An outgoing line for supplying a medium whose temperature is adjusted by the medium temperature adjusting device to the inlet port of the double rotary joint;
A drum temperature adjusting device for a truck agitator for transporting ready-mixed concrete, comprising a return pipe for returning a medium discharged from an outlet port of the double rotary joint to the medium temperature adjusting device. The vehicle body is loaded with a drum for transporting ready-mixed concrete, a washing water tank for storing washing water, and a pump for sending water in the washing water tank toward a washing nozzle for washing the drum. A drum temperature adjusting device for a truck agitator for transporting ready-mixed concrete,
A heat exchanger provided on the drum and rotating together with the drum;
A non-rotating bed having an inlet port and an outlet port is provided, and a forward path for guiding a medium supplied from the inlet port to the inlet of the heat exchanger and a medium discharged from the outlet of the heat exchanger are guided to the outlet port. A double rotary joint having a return path;
A medium supply system for supplying water in the washing water tank as a medium to the inlet port of the double rotary joint;
A drum temperature adjusting device for a truck agitator for transporting ready-mixed concrete, comprising: a medium return path for returning the medium discharged from the outlet port of the double rotary joint to the washing water tank. 5. A medium temperature adjusting device that adjusts the temperature of temperature adjusting water that circulates through the medium return path, the washing water tank, and the medium supply path and functions as a medium. Drum temperature control device for truck agitator for transporting ready-mixed concrete. The medium supply system uses a switching operation to shut off water from the pump toward the cleaning nozzle and lead to a temperature adjustment port, and water discharged from the temperature adjustment port of the branch valve is used for temperature adjustment. 6. A drum temperature adjusting apparatus for a truck agitator for transporting ready-mixed concrete according to claim 4 or 5, further comprising a conduit for guiding the water to the inlet port of the double rotary joint. 7. The drum temperature adjusting device for a truck agitator for transporting ready-mixed concrete according to claim 3, wherein the double rotary joint is provided on an output shaft of a drum driving mechanism for rotating the drum. The said heat exchanger forms a medium flow path between the outer sheet | seat and the inner sheet | seat with high heat conductivity, The said inner sheet | seat side is contacted with the outer peripheral surface of the said drum. The drum temperature adjusting device for a truck agitator for transporting ready-mixed concrete according to 4, 5, 6, or 7. The drum temperature adjusting apparatus for a truck agitator for transporting ready-mixed concrete according to claim 3, 4, 5, 6, 7, or 8, wherein the heat exchanger is detachable from the drum. The drum temperature of the truck agitator for transporting ready-mixed concrete according to claim 3, 4, 5, 6, 7, 8, or 9, wherein the medium temperature adjusting device can be used by selectively replacing a chilled water machine or a hot water machine. Adjustment device. The tip of the double rotary joint is positioned in the internal space on the rotary drive end side of the drum, and the internal space on the rotary drive end side and the ready-mixed concrete storage space for storing ready-mixed concrete are isolated in the drum. 11. The drum temperature adjusting device for a truck agitator for transporting ready-mixed concrete according to claim 3, wherein a separating wall is provided.

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