JP2012112013A - Method for producing vibration-proof rubber fitting, and hot water washing apparatus used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a vibration-proof rubber fitting which can significantly reduce COgenerated in a hot water washing step and can also reduce use energy, thereby capable of reducing energy cost.SOLUTION: The vibration-proof rubber fitting is produced by successively performing the steps of: pretreatment, chemical conversion coating treatment, washing, hot water washing, and drying. In the hot water washing step, hot water supplied from a heat pump supply part 38 is allowed to flow into a buffer tank 54, and at the same time, hot water in the buffer tank 54 is allowed to continuously flow out to be continuously supplied to a hot water washing tank 34 at a set flow rate, while discharging hot water in the hot water washing tank 34 by overflowing. The hot water supply capacity of the heat pump supply part 38 is higher than the amount of the overflowing hot water. When the vibration-proof rubber fitting is subjected to hot water washing in the hot water washing tank 34, the difference of the continuous inflow of hot water to the buffer tank 54 and the continuous outflow of hot water from the buffer tank 54 is absorbed by the buffer tank 54.

Description

  The present invention relates to a method of manufacturing a vibration-proof rubber fitting that forms a vibration-proof rubber together with a rubber elastic body, and a hot water washing apparatus used in the method.

Conventionally, various anti-vibration rubbers are widely used for preventing vibrations in automobiles, industrial machines and other various fields.
This type of anti-vibration rubber is generally composed of a rubber elastic body and anti-vibration rubber metal fittings that mainly perform vibration prevention.

FIG. 5 (a) shows a specific example.
This example is an example of a cylindrical anti-vibration rubber, which has an outer cylinder fitting 200 as an anti-vibration rubber fitting, an inner cylinder fitting 202, and a rubber elastic body 204, which are vulcanized and bonded together.
In the vibration-proof rubber metal fitting manufacturing process of this vibration-proof rubber, a chemical conversion film treatment process for forming a chemical conversion film such as a zinc phosphate film mainly for the purpose of rust prevention on the metal surface is performed, and then a hot water washing process is performed. The

Here, the hot water washing step is a step of removing the chemical adhering to the metal fitting in the previous chemical film treatment step.
Since the chemical | medical agent adhering to a metal fitting at the chemical conversion film treatment process will remain on the metal fitting after that and will cause rust of the metal fitting, the metal fitting is washed and removed after the chemical conversion film treatment.
This hot water washing step also has the meaning of promoting drying in the subsequent drying step by warming the metal fitting with hot water and raising the temperature.
Incidentally, in the manufacturing process of the vibration-proof rubber fitting, the point of performing the chemical conversion coating treatment and the subsequent hot water washing process is disclosed in the following Patent Document 1, Patent Document 2, and the like.

In this hot water washing process, the metal fitting after the chemical conversion film treatment has been conventionally washed with hot water as follows.
In FIG. 5 (b), 206 is a hot water washing tank for washing the metal fitting after the chemical conversion film treatment. Here, the hot water (temperature is 80 ° C.) is continuously discharged from the overflow portion 214 by overflow, and the water supply pipe 210. While looking at the flow meter 213, the flow rate is reduced by the throttle valve 212 to the set flow rate (here, 3 to 4 liters / minute), and well water (temperature is about 16 to 17 ° C. in the summer) is washed inside the hot water bath 206. The metal fittings as a workpiece are immersed in the hot water washing tank 206 and cleaned while being heated to 80 ° C. by a steam heater 208 provided in the hot water washing tank 206.

  Here, the well water is continuously supplied into the hot water bath 206 while the hot water in the hot water bath 206 is discharged due to overflow. In order to prevent this, the hot water washing process always supplies fresh well water to the hot water washing tank 206, and it is also contaminated with chemicals. The hot water is discharged from the hot water bath 206 to the outside.

For that purpose, it is necessary to supply fresh well water and discharge hot water at a flow rate above a certain level. Here, the well water is continuously supplied at a flow rate of 3 to 4 liters / minute.
However, when the heating using the steam heater 208, the heating efficiency is low, the energy consumption is large, in addition to being a factor to push up the possible processing costs, there is a CO ₂ emissions are problematic.
In recent years, reduction of CO ₂ has been sought on a global scale, and it is not desirable that the amount of CO ₂ generated is large, and there is a strong demand for improvement.

  In the heating method using the steam heater 208, steam generated in the boiler is supplied to the steam heater 208 through a pipe, and hot water or water whose temperature has decreased due to heat exchange in the hot water washing tank 206 is discharged as a drain. Is returned to the boiler, and heat is radiated during the circulation process, which causes a decrease in thermal efficiency. In addition, the heat of the steam forms a stainless steel pipe (steam heater used in the hot water tub 206). 208 is used for heating (a stainless steel pipe is used to prevent rust), and this is one factor that deteriorates the thermal efficiency when heating the well water in the hot water bath 206. ing.

Further, in the system in which the steam heater 208 is installed in the hot water washing tank 206 and the cold well water continuously supplied into the hot water washing tank 206 is heated there, as another problem, the hot water heated by heating is another problem. However, there is a problem that it rises upward in the hot water bath 206 as it is, overflows from the overflow portion 214 and is easily discharged outside.
In this case, it is difficult for the heat from the steam heater 208 to reach the entire hot water tub 206 sufficiently, or the hot water rising from the steam heater 208 is not sufficiently utilized for cleaning the metal fittings or heating the metal fittings to raise the temperature. It will be discharged from the hot water bath 206 as it is.

Therefore, it is conceivable that hot water boiled to a predetermined temperature is continuously supplied to the hot water bath 206 instead of boiling the hot water inside the hot water bath 206 with a heater.
At that time, a natural refrigerant heat pump water heater is used to generate (take in) hot water using the thermal energy of the outside air (air) heated by the sun and supply hot water to the hot water washing tank 206 from the hot water heater. It may be possible to supply hot water.

This natural refrigerant heat pump water heater is known as Ecocute (trade name). However, when this is used for hot water supply to the hot water bath 206 in the hot water washing step, there are the following problems.
This heat pump water heater is a system that generates hot water at night with low-cost electric power and stores it in a hot water storage tank. For industrial use, a heat pump unit and a large number of hot water storage tanks are set. It is.

This heat pump water heater uses the air heat exchanger to take the thermal energy of the outside air (air) into the refrigerant (CO ₂ refrigerant) and raise the refrigerant temperature, and then compresses it to achieve a high temperature, so that water heat exchange The water is heated to form hot water using a water heater. Hot water is generated and supplied using natural heat energy, and has the advantage that less energy is required for hot water supply.

FIG. 6 shows an example in which this heat pump water heater is applied for hot water supply to the hot water tub 206 as a comparative example.
In the figure, reference numeral 215 denotes a heat pump water heater, which consists of a set of a heat pump hot water outlet 216 and a hot water storage tank group 218.
The heat pump hot water outlet 216 has an air heat exchanger 220, a compressor 222, a water heat exchanger 224, and an expansion valve 225. The air heat exchanger 220 takes in the heat energy of the outside air into the refrigerant and warms it. In addition, heat is exchanged between the refrigerant 222 compressed by the compressor 222 and heated by the water heat exchanger 224 and the water, and the water in the hot water storage tank 226 is heated to form hot water. Hot water is stored in each hot water storage tank 226.
A circulation pump 228 circulates the water in the hot water storage tank 226 while passing through the water heat exchanger 224.

  In the heat pump water heater 215, the hot water is generated, discharged and stored in the hot water storage tank 226 at night when the power cost is low, and the hot water stored in the hot water storage tank 226 is used in the daytime. At this time, the heat pump hot water outlet 216 is in an operation stopped state.

However, in reality, the above hot water washing process in the factory is continuously performed for 24 hours. In the hot water bath 206, the water washing process is continuously performed for 3 to 4 liters / hour continuously for 24 hours. When overflowing at a flow rate of minutes and supplying hot water to the hot water tub 206 by the same amount, a total of 7200 liters of hot water must be continuously supplied in one day. 13 hot water storage tanks 226 are required in total, and the hot water storage tank group 218 alone requires an installation area of about 13 m ² , and an extremely large space is required for the hot water storage tank group 218 installation.

In addition, as an essential problem, if the necessary amount of hot water is stored in each hot water storage tank 226 and then hot water is supplied to the hot water tub 206 over 24 hours a day, there is no time to store hot water in each hot water storage tank 226. The system itself does not hold.
Furthermore, in a factory that operates continuously for 24 hours, midnight power itself may not be cheap in the first place due to a contract with an electric power company.

Japanese Utility Model Publication No. 4-35414 JP 2006-275257 A

The present invention is based on the circumstances as described above, and a method of manufacturing a vibration-proof rubber fitting that can greatly reduce CO ₂ generated in a hot water washing process and that can reduce energy consumption and energy cost. The object is to provide a hot water washing apparatus.

  Thus, claim 1 relates to a method of manufacturing a vibration-proof rubber metal fitting, and sequentially performs a pretreatment process, a chemical conversion film treatment process, a water washing process, a hot water washing process, and a drying process for forming a chemical conversion film on a metal fitting. A method for producing a vibration-proof rubber fitting having a chemical conversion coating on the surface, which constitutes a vibration-proof rubber together with a rubber elastic body, wherein in the hot water washing step, hot water is generated by heating with a heat pump and discharged. While letting out the hot water from the section into the buffer tank, the hot water in the buffer tank is continuously flowed out, and the hot water in the hot water washing tank is discharged by overflow, and continuously into the hot water washing tank at a set flow rate. The buffer tank is provided with a temperature sensor that detects the temperature of the hot water inside the buffer tank, and the heat pump hot water discharge unit is configured so that the temperature detected by the temperature sensor becomes a set temperature. The heat pump hot water discharge section has a continuous hot water discharge capacity equal to or higher than the flow rate of the overflow, and a continuous inflow amount of the hot water into the buffer tank and a continuous flow of hot water from the buffer tank. The metal fitting after the chemical conversion coating treatment is washed in the hot water bath while absorbing the difference from the amount of outflow with the buffer tank.

  According to a second aspect of the present invention, in the first aspect, the number of the heat pump hot water outlets is one set, and the number of the buffer tanks is one.

  When the temperature detected by the temperature sensor on the bottom side reaches the set temperature, the temperature sensor is also provided on the bottom side of the buffer tank. The heat exchange of the heat pump is temporarily stopped.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, continuous hot water supply to the hot water washing tank is performed downward toward the bottom on the bottom side of the hot water washing tank. .

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the hot water flowing out of the buffer tank is used as a hot water supply line for supplying hot water to the hot water tub, so that hot water is supplied during normal continuous hot water washing. A main pipe provided with a throttle valve that restricts the flow rate of hot water flowing through the pipe to the set flow rate, and a hot water supply branching off from the main pipe at an upstream portion of the throttle valve and the hot water washing tank is empty And a bypass line that does not have the throttle valve is provided.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, a steam heater is provided in the hot water washing tub, a steam supply line for the steam heater, and an outflow from the steam heater. It is characterized by being connected to a discharge pipe for discharging water.

  Claim 7 relates to a hot water washing apparatus, and the hot water washing apparatus is a hot water washing apparatus used in the hot water washing step in the method of manufacturing a vibration-proof rubber fitting according to any one of claims 1 to 6, (a) a hot water bath, (b) a heat pump hot water outlet that generates hot water by heating with a heat pump and has a continuous hot water discharge capacity equal to or greater than the flow rate of hot water overflow from the hot water bath, and (c) the heat pump hot water A buffer tank that allows the internal hot water to flow out for continuous hot water supply to the hot water washing tank and absorb the difference between the inflow amount and the outflow amount of the hot water. The buffer tank is provided with a temperature sensor for detecting the temperature of the hot water inside, and the heat pump hot water discharge section performs hot water discharge so that the temperature detected by the temperature sensor becomes a set temperature. .

Effects and effects of the invention

  As described above, the present invention manufactures a vibration-proof rubber fitting having a chemical conversion film on the surface by sequentially performing the pretreatment process, the chemical conversion film treatment process, the water washing process, the hot water washing process, and the drying process for forming the chemical conversion film. In this case, in the hot water washing process, hot water in the buffer tank is continuously discharged while hot water from the heat pump hot water outlet that generates and discharges hot water by heating with a heat pump is allowed to flow into the buffer tank, and hot water in the hot water tank is drained. While being discharged by overflow, the hot water tank is continuously supplied with hot water at a set flow rate, and the heat pump hot water discharge unit has a continuous hot water discharge capacity equal to or higher than the flow rate of the overflow, and continuously into the buffer tank. The anti-vibration rubber fittings are washed in the hot water tank while absorbing the difference between the amount of incoming hot water and the continuous flow of hot water from the buffer tank. It is intended.

Since the present invention described above generates and discharges hot water by heating with a heat pump, it can generate and discharge hot water by effectively using the thermal energy of the outside air, to generate and discharge hot water. Energy consumption can be reduced, energy costs can be reduced, and generated CO ₂ can be greatly reduced, contributing to the protection of the global environment.

  Further, the present invention as described above generates and discharges hot water in the heat pump hot water outlet in advance, stores the hot water in the hot water storage tank, and discharges the hot water stored in advance from the hot water storage tank in the operation stop state of the heat pump hot water outlet. The hot water discharged from the heat pump hot water outlet is not continuously supplied to the hot water bath, but is once continuously supplied to the hot water bath via the buffer tank. As shown in the example, it is not necessary to install a large number of hot water storage tanks, and a large space for installing the hot water storage tanks can be eliminated.

Further, according to the present invention, hot water can be supplied continuously to the hot water washing tank for 24 hours and the hot water washing process can be performed in the hot water washing tank.
The tank used in the present invention is not a hot water storage tank, that is, only a hot water storage tank for storing hot water and a hot water storage tank for only hot water outflow when hot water is used. This is a buffer tank that absorbs the difference from the amount, and the hot water discharged from the heat pump hot water outlet is simply supplied to the hot water washing tank as it is once through the buffer tank. Hot water can be supplied.

  However, for that purpose, it is necessary to be able to supply hot water to the hot water washing tank in an amount equal to or more than the overflow amount in the hot water washing tank, so in the present invention, the heat pump hot water discharge part has a continuous hot water discharge capacity equal to or higher than the overflow content. There is.

The present invention also does not boil water into hot water by a heater inside the hot water bath, but generates hot water in advance outside the hot water bath and supplies it to the hot water bath. In addition, it is possible to make hot water spray downwardly toward the bottom of the hot water bath, that is, at the bottom of the hot water bath (Claim 4). While pushing up the hot water inside the washing tub from the bottom side as a whole, the hot water inside the washing tub can be continuously replaced with the hot water inside the washing tub.
In this case, the waste that is heated by the heater inside the hot water tank and becomes hot water overflows and is lost without being effectively used to raise the temperature of the entire wash water inside the hot water tank. It does not occur, and the supplied hot water stays inside the hot water bath and contributes to raising the temperature of the entire wash water inside the hot water bath.
This also has an advantage in increasing the thermal efficiency.

In the present invention, the buffer tank also has a function of making sure that the hot water supplied to the hot water tub is set to a constant temperature.
The hot water discharged from the hot water outlet is once allowed to flow into the buffer tank, so that the temperature of the hot water can be averaged to a constant temperature and supplied to the hot water washing tank.

  The buffer tank is equipped with a temperature sensor, and hot water is discharged from the heat pump hot water outlet so that the detected temperature becomes the set temperature, so that hot water is continuously supplied to the water bath at a constant temperature. can do.

Of course, during the holidays when the plant is shut down, the baths are not washed in the bath. In this case, the hot water in the buffer tank is washed into the baths that are empty at the end of the day. It can be made to supply to a tank.
In this case, the time required for starting up the hot water washing operation can be shortened.

In the present invention, the number of heat pump hot water outlets can be a set, and the number of buffer tanks can be one (claim 2).
Further, the above temperature sensor is also provided on the bottom side of the buffer tank, and when the temperature detected by the temperature sensor on the bottom side reaches the set temperature, the heat exchange of the heat pump can be automatically stopped temporarily. (Claim 3).

  According to the fifth aspect of the present invention, the hot water supply line is a continuous hot water supply to the hot water tank during normal continuous hot water washing, the main pipe line provided with a throttle valve for restricting the hot water flow rate to the set flow rate, A bypass pipe that does not have a throttle valve is provided for branching and supplying hot water in an empty state, and when the inside of the hot water tank is empty at the end of the day, the bypass pipe The hot water from the buffer tank is supplied to the hot water bath through the passage at a large flow rate. According to claim 5, it is possible to effectively shorten the start-up time of the hot water washing operation after the break. can do.

In the present invention, a steam heater is provided in the hot water washing tank, and this can be used as an auxiliary heater for auxiliary heating of the hot water in the hot water washing tank to raise the temperature. ).
In this case, even if the hot water supply mechanism including the heat pump hot water outlet has a trouble such as a failure, the hot water washing process can be performed by heating with the steam heater.
For this purpose, it is preferable that the well water can be continuously supplied to the water bath.

  Claim 7 relates to a hot water washing apparatus used in the hot water washing process, and has a hot water washing tank, a heat pump hot water outlet, and a buffer tank. By using the hot water washing apparatus of this claim 7, It becomes possible to carry out the hot water washing step well.

It is explanatory drawing of the process of the manufacturing method of the vibration-proof rubber metal fitting which is one Embodiment of this invention. It is explanatory drawing of the water-washing process in the same embodiment, a hot-water washing process, and a drying process. It is the figure which showed the content of the hot water washing process of FIG. 2 concretely. It is the figure which showed the principal part of other embodiment of this invention. (A) It is the figure which showed an example of the vibration isolator rubber. (B) It is explanatory drawing of the hot water washing process performed conventionally. It is the figure which showed the example which applied the heat pump water heater for the hot water supply of a hot water washing process as a comparative example.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
Here, as an example, the manufacturing method of the anti-vibration rubber fitting made of the outer cylindrical fitting in the cylindrical anti-vibration rubber shown in FIG. 5 will be described together with the configuration of the hot water washing apparatus.

In this embodiment, the vibration-proof rubber fitting is manufactured according to the process shown in FIG.
Specifically, prior to the chemical conversion coating treatment step 20, first, a pretreatment step is performed, then a chemical conversion coating treatment step 20, a water washing step 22, a hot water washing step 24, and a drying step 26 are carried out. The passed anti-vibration rubber fitting is discharged in the discharge step 28.

Here, as a pretreatment process, a wet blast process 10, a degreasing process 14, and a water washing process 16 are sequentially performed.
The wet blasting process 10 in the pretreatment process 18 is a process in which a new surface is exposed on the surface of a material metal fitting (hereinafter simply referred to as a metal fitting) and the surface is roughened. The degreasing process 14 degreases the metal fitting surface using a degreasing liquid. In the process, the subsequent water washing process 16 is a process of removing the degreasing liquid by washing with water.

  The chemical conversion film treatment process 20 following the pretreatment process 18 is a process of forming a chemical conversion film such as a zinc phosphate film on the surface by immersing the metal fitting after the pretreatment in the treatment liquid, and the subsequent water washing process 22 and The subsequent hot water washing step 24 is a step of washing and removing the chemicals in the treatment liquid adhering to the surface of the metal fitting after washing the metal fitting once subjected to the chemical conversion coating treatment with water.

  The hot water washing step 24 is also intended to warm the metal fitting, and by heating the metal fitting in the hot water washing step 24, drying in the subsequent drying step 26 can be promoted.

FIG. 2 shows more specifically a part of each step of FIG. 1, specifically, the water washing step 22, the hot water washing step 24 and the drying step 26.
In the figure, reference numeral 30 denotes a rotary barrel. Here, a metal fitting W as a work is placed inside the barrel 30, and in the water washing step 22, the work 30 is immersed in the water washing tank 32 together with the barrel 30 to rotate the barrel 30. Then, the internal metal fitting W is washed with internal water while moving its posture and position irregularly.
Further, in the hot water washing step 24, the metal fitting W is similarly immersed in the hot water in the tank together with the barrel 30, and the barrel 30 is rotated, thereby causing the hot water while the workpiece W is irregularly moved in posture and position within the barrel 30. Wash with hot water in the tub 34.

  In the drying step 26, the metal fitting W is positioned together with the barrel 30 in the drying tank 36, and hot air for drying is blown onto the metal fitting W while the barrel 30 is rotated to dry the metal fitting W.

FIG. 3 shows the specific contents of the hot water washing step 24 together with the hot water washing apparatus.
In the figure, 38 is a heat pump hot water outlet for generating hot water by heating with a heat pump, and a pipe 40 for circulating a CO ₂ refrigerant (hereinafter simply referred to as refrigerant), an air heat exchanger 42 provided in the pipe 40, a compressor 44, a water heat exchanger 46, an expansion valve 48, and a fan 50.
Further, a circulation pump 49 is further provided for extracting water from a buffer tank 54 to be described later, passing it through the water heat exchanger 46, and flowing it into the buffer tank 54 as hot water.

  In the heat pump hot water supply section 38, the heat energy from the outside air sucked in by the air heat exchanger 42 is taken into the refrigerant to warm the refrigerant, and then the refrigerant is compressed by the compressor 44 so that the refrigerant becomes a high temperature, and the water heat exchanger In 46, the water supplied through an outflow pipe 60 described later is heated and discharged.

  Further, the refrigerant that has passed through the water heat exchanger 46 and has flowed downward in the figure is expanded by the expansion valve 48 to lower the refrigerant temperature, and the air heat exchanger 42 warms the refrigerant again.

  Reference numeral 54 denotes a buffer tank, and an inflow pipe 58 and an outflow pipe 60 in the water pipe 56 are connected to the bottom of the buffer tank. Well water can flow into the buffer tank 54 from the bottom through the inflow pipe 58. Furthermore, water near the bottom in the buffer tank 54 can flow out to the outside through the outflow pipe 60.

The water flowing out through the outflow line 60 is sent to the water heat exchanger 46 and heated there.
Note that a pump 62 and an on-off valve 64 are provided in the inflow conduit 58.
The pump 62 is for sending well water to the buffer tank 54 side at a predetermined pressure (in this case, a pressure of ₂ kgf / cm ₂ ), and may be omitted when the well has the predetermined pressure. It is.

  Reference numeral 66 denotes a hot water supply pipe for supplying hot water from the heat pump hot water supply section 38 to the hot water tub 34, an inflow pipe 68 for flowing hot water from the heat pump hot water discharge section 38 into the buffer tank 54, and hot water flowing out from the buffer tank 54. And an outflow pipe 70 for supplying the hot water to the hot water bath 34.

In this embodiment, the heat pump hot water discharge section 38 has a hot water discharge capacity that exceeds the flow rate discharged from the hot water tub 34, which will be described later, that is, has the ability to generate hot water at a flow rate higher than that. It is said that.
The buffer tank 54 has a function of absorbing a difference between the flow rate of hot water flowing in through the inflow conduit 68 and the flow rate of hot water flowing out through the outflow conduit 70 and temporarily storing the difference in the tank.

The buffer tank 54 is provided with temperature sensors 72 at a plurality of locations inside the buffer tank 54 so that the temperature of the hot water inside the buffer tank 54 can be detected.
In this embodiment, based on the temperature detected by the temperature sensor 72, the heat pump hot water discharge unit 38 generates hot water at a set temperature (here, 60 ° C.) and flows it into the buffer tank 54.
Here, temperature sensors 72 are provided at three locations in the upper and lower portions of the buffer tank 54. Here, the uppermost temperature sensor 72 is positioned at a capacity of 80% of the total tank capacity, the intermediate temperature sensor 72 is positioned at a capacity of 60%, and the lowermost temperature sensor 72 is a capacity of 30%. Respectively.

  Specifically, based on the detection signal from the temperature sensor 72, the controller 74 controls the compression rate by the heat pump hot water outlet 38, specifically the compressor 44, and controls the heating capacity in the water heat exchanger 46.

The hot water supply line 66, specifically, the outflow line 70, has its distal end inserted downward into the hot water washing tub 34, and the discharge port 76 at its distal end is directed toward the bottom 78 near the bottom 78 of the hot water washing tub 34. Oriented.
Accordingly, the hot water supplied into the hot water washing tank 34 through the hot water supply pipe 66 is ejected from the discharge port 76 toward the bottom 78 of the hot water washing tank 34.
As a result, the hot water in the hot water tub 34 is replaced with hot water sent through the hot water supply pipe 66 at the deepest portion on the bottom 78 side, and excess hot water overflows from the overflow portion 80 and is washed. It is discharged from the tank 34.

The hot water supply line 66 has a bypass line 70-2 branched from a main line 70-1 for supplying hot water during normal continuous hot water washing.
The main pipe 70-1 is provided with a throttle valve 81. The hot water supply pipe 66, more specifically, the flow rate of hot water continuously supplied to the hot water tub 34 through the main pipe 70-1 is set by the throttle valve 81. The flow rate is restricted to a constant flow rate of 3 to 4 liters / minute.

The bypass line 70-2 branches from the main line 70-1 at the upstream part of the throttle valve 81 and merges with the main line 70-1 again at the downstream part of the flow meter 82.
The bypass conduit 70-2 is provided with an opening / closing valve 84 for opening and closing the bypass conduit 70-2.

  Here, the bypass line 70-2 is for supplying hot water stored in the buffer tank 54 into the hot water washing tub 34 that is empty at the end of the holidays, etc., and at this time, the on-off valve 84 is opened. As a state, the hot water in the buffer tank 54 is supplied to the hot water washing tank 34 through the bypass line 70-2 at a large flow rate.

  At this time, the throttle valve 81 of the main pipeline 70-1 can be maintained at a constant throttle amount. Therefore, when the hot water is supplied again to the hot water tub 34 through the main pipeline 70-1, the hot water supply flow rate is set to the set flow rate. It can be maintained as it is.

A steam heater 86 is provided in the vicinity of the bottom 78 as an auxiliary heater inside the hot water bath 34. A steam supply pipe 88 and a discharge pipe 90 for discharging outflow water having a predetermined temperature flowing out through the steam heater 86 as a drain are connected to the steam heater 86.
The supply pipe 88 and the discharge pipe 90 are connected to the boiler, and the effluent discharged through the discharge pipe 90 is returned to the boiler again, where it is converted into steam and sent out.
The supply pipe 88 is provided with an electromagnetic opening / closing valve 92.

  In this embodiment, the hot water from the heat pump hot water supply unit 38 is once supplied through the buffer tank 54 into the hot water tub 34 at a set flow rate of 3 to 4 liters / minute, and the flow rate of the hot water supply is overflowed. Overflow from 80 is discharged from the hot water tub 34.

  While performing the continuous hot water supply and discharge due to overflow, the metal fitting W after the chemical conversion coating treatment is washed in the hot water bath 34 and is attached to the metal fitting W in the treatment liquid during the chemical conversion coating treatment. The chemical is washed with hot water in the hot water tub 34 and removed from the metal fitting W.

  Here, hot water having a temperature of 60 ° C. is supplied into the hot water washing tank 34 through the hot water supply pipe 66. Then, the hot water temperature is raised to 80 ° C. by the steam heater 86 inside the hot water washing tub 34, and the metal fitting W is washed with the 80 ° C. hot water.

The continuous pumping capacity of the heat pump hot water discharge section 38 is high. Here, hot water is discharged at a flow rate of 5 liters / minute, and flows into the buffer tank 54 through the inflow pipe 68.
On the other hand, hot water flows out from the outflow pipe 70 at a flow rate of 4 liters / minute. The difference is absorbed by the buffer tank 54, so that the amount of hot water inside the buffer tank 54 increases while hot water is continuously supplied to the hot water tub 34 at a set flow rate.

  When the temperature detected by the lowest temperature sensor 72 provided on the bottom side of the buffer tank 54 finally reaches the set temperature, the heat pump hot water discharge section 38 is temporarily and automatically stopped under the control of the controller 74. To do.

Here, a steam heater 86 is provided as an auxiliary heater in the hot water bath 34 so that the hot water supplied to the hot water bath 34 at a hot water temperature of 60 ° C. is raised to 80 ° C. in the hot water bath 34. However, it is also possible to supply the hot water heated to 80 ° C. from the heat pump hot water supply unit 38 to the hot water washing tank 34 in this case. In this case, the steam heater 86 is used to raise the hot water temperature. Use can be made unnecessary.
In this embodiment, the capacity of the buffer tank 54 is 560 liters, and the capacity of the hot water bath 34 is 350 liters.

According to the present embodiment as described above, the heat energy generated by the outside air is effectively utilized to generate and discharge the hot water and supply it to the hot water tub 34, so that the energy consumption can be reduced to a small amount of energy. Energy costs can be reduced, and CO ₂ generated can be greatly reduced, contributing to global environmental protection.
Incidentally, according to this embodiment, it is possible to reduce 47.0 tons of CO ₂ per year on a hot water washing apparatus basis as compared with the example shown in FIG. In addition, the energy cost can be reduced by about 1.3 million yen per vehicle in annual conversion.

Moreover, in this embodiment, it is not necessary to install many hot water storage tanks as shown in the comparative example of FIG. 6, and a large space for installing hot water storage tanks can be eliminated.
Furthermore, according to this embodiment, hot water can be supplied continuously to the hot water tub 34 for 24 hours, and the hot water rinsing process can be performed in the hot water tub 34.

In the present embodiment, hot water is generated in advance outside the hot water washing tank 34 and supplied to the hot water washing tank 34. At that time, the deepest part of the hot water washing tank 34, that is, the hot water washing tank 34. Since hot water is jetted downward toward the bottom on the bottom side, the hot water in the hot water bath 34 is continuously replaced while the hot water in the hot water bath 34 is entirely pushed up from the bottom side. 34 can be used to supply hot water.
Accordingly, the supplied hot water stays in the hot water washing tank 34 and contributes to the temperature rise of the entire washing water in the hot water washing tank 34, and is effectively utilized for cleaning and raising the temperature of the metal fitting W.

FIG. 4 shows another embodiment of the present invention.
In this example, a water supply line 94 for supplying well water to the hot water washing tub 34 is added.

  In this embodiment, the well water supply line 94 is additionally provided because the heat pump hot water discharge section 38 is out of order and cannot supply hot water in the hot water tank 34 through the water supply line 94. In order to be able to supply water to the inside, in this case, it is necessary to heat the well water to a hot water temperature of 80 ° C. by the steam heater 86 in the hot water washing tank 34 to raise the temperature. Therefore, in this case, it is necessary to install a steam heater 86 in the hot water tub 34.

  Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be applied in the manufacture of various vibration-proof rubber fittings other than those exemplified above. The present invention can be implemented with various modifications without departing from the scope of the invention.

18 Pretreatment process 20 Chemical conversion film treatment process 22 Water washing process 24 Hot water washing process 26 Drying process 34 Hot water washing tank 38 Heat pump hot water outlet 54 Buffer tank 66 Hot water supply line 70 Outflow line 70-1 Main line 70-2 Bypass line 81 Throttle valve 86 Steam heater 88 Supply line 90 Discharge line

Claims (7)

A metal coating is formed on the surface of the metal fitting to form the anti-vibration rubber together with the rubber elastic body by sequentially performing a pre-treatment process, a chemical film treatment process, a water washing process, a hot water washing process, and a drying process for forming a chemical film on the metal fitting. A method of manufacturing a vibration-proof rubber fitting having
In the hot water washing step, the hot water in the buffer tank is continuously flowed out while flowing out the hot water from the heat pump hot water outlet that generates hot water by heating with the heat pump into the buffer tank, Let the hot water bath continuously supply hot water at a set flow rate while discharging hot water due to overflow,
The buffer tank is provided with a temperature sensor for detecting the temperature of the hot water inside, and the hot water is discharged from the heat pump hot water outlet so that the temperature detected by the temperature sensor becomes a set temperature.
The heat pump discharge portion has a continuous discharge capacity equal to or greater than the flow rate of the overflow, and determines a difference between a continuous inflow amount of the discharged hot water to the buffer tank and a continuous outflow amount of hot water from the buffer tank. A method for producing an anti-vibration rubber fitting, wherein the metal fitting after the chemical conversion coating treatment is washed in the hot water bath while absorbing in a tank.   2. The method of manufacturing a vibration-proof rubber fitting according to claim 1, wherein the number of the heat pump hot water outlets is one set and the number of the buffer tanks is one.   In any one of Claims 1 and 2, the temperature sensor is provided also on the bottom side of the buffer tank, and when the temperature detected by the temperature sensor on the bottom side reaches the set temperature, heat exchange of the heat pump is performed. A method of manufacturing a vibration-proof rubber fitting, characterized by temporarily stopping.   4. The method of manufacturing a vibration-proof rubber fitting according to claim 1, wherein continuous hot water supply to the hot water washing tank is performed downward toward the bottom on the bottom side of the hot water washing tank. .   The hot water flowing in the pipe for supplying hot water during normal continuous hot water washing as a hot water supply pipe for supplying hot water flowing out from the buffer tank to the hot water washing tub as defined in any one of claims 1 to 4. A main pipe provided with a throttle valve for restricting the flow rate of the throttle to the set flow rate, and the throttle for supplying hot water when the hot water bath is branched off from the main pipe line upstream of the throttle valve A method of manufacturing a vibration-proof rubber fitting, characterized in that a bypass conduit having no valve is provided.   6. A steam heater according to claim 1, wherein a steam heater is provided in the hot water washing tank, a steam supply line for the steam heater, and a discharge pipe for discharging the effluent water from the steam heater. A method for manufacturing a vibration-proof rubber fitting, wherein A hot water washing apparatus used in the hot water washing step in the method of manufacturing a vibration-proof rubber fitting according to any one of claims 1 to 6,
(a) With bath
(b) a heat pump hot water discharge section that generates hot water by heating with a heat pump and discharges the hot water, and has a continuous hot water discharge capacity equal to or higher than the flow rate of hot water overflow from the hot water washing tank;
(c) A buffer tank that allows the hot water in the heat pump hot water to flow out while the internal hot water flows out for continuous hot water supply to the hot water washing tank and absorbs the difference between the inflow and outflow of the hot water And the buffer tank includes a temperature sensor for detecting the temperature of the hot water inside, and the heat pump hot water discharge portion performs hot water discharge so that the temperature detected by the temperature sensor becomes a set temperature. A hot water washing apparatus characterized by that.

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