JP2000346790A - Spray type heat treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat treatment apparatus easily treating an object to be treated by spraying heating and clooling treatment solns. thereon, made compact as a whole by miniaturizing a treatment soln. storage tank to be reduced in its installation space and capable of easily performing the changeover of the heating and cooling of the object to be treated and the alteration of treatment temp. conditions for a short time. SOLUTION: In a spray type heat treatment apparatus equipped with a treatment tank 2 enabling the taking in and out of an object (s) to be treated and having a spray nozzle 6 for spraying a treatment soln. on the object (s) to be treated and a treatment soln. storage tank 11 and spraying the treatment soln. (h) on the object (s) to be treated in the treatment tank 2 from the spray nozzle 6 to apply a heat shock to the object (s) to be treated, a circulating pump 12 sucking the treatment solns. (h) in both of the storage tank 11 and the treatment tank 2 at the same time or selectively to supply them to the storage tank 11 and the treatment tank 2 at the same time or selectively is provided to a piping 18 and a heat exchanger 13 is provided on the way of the piping 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for heat treatment, thermal shock test, cleaning, etc. of small (small heat capacity) parts (hereinafter referred to as "objects to be treated") such as small precision equipment and electronic equipment. The present invention relates to a spray heat treatment apparatus or a spray heat test apparatus (hereinafter, simply referred to as a spray heat treatment apparatus).

[0002]

2. Description of the Related Art As shown in FIG. 7, a thermal test apparatus 70 for heating and cooling the above components and the like by using a processing liquid and applying a thermal shock to test the components is a heater as a heat exchange element. Storage tank 71 for heating high-temperature liquid h provided with 73
And a storage tank 72 for a low-temperature liquid for cooling c provided with a cooler 74 as a heat exchange element. In general, parts s and the like are put in a basket-like container and selectively moved by a lifting mechanism 80. It is carried out by lowering and immersing in the liquid in each storage tank 71/72.

[0003] Prior art relating to this type of apparatus is disclosed in, for example, Japanese Patent Publication No. 3-71062 and Japanese Patent Laid-Open No. 4-225.
Although there is an invention described in Japanese Patent Publication No. 137, all of them basically have the above structure shown in FIG.

[0004]

However, in the conventional general thermal test apparatus including the invention described in the above publication,
There are the following problems. That is, since two large-capacity liquid tanks are required, the entire apparatus becomes large and a large installation space is required.

[0005] The liquid tank has a large heat capacity and thus is excellent in the stability of the liquid temperature, but on the other hand, it takes a long time to change the temperature condition of the processing liquid.

Since it is necessary to move an object to be processed such as a component to a storage tank for each processing liquid and immerse the processing object in the processing liquid, the processing operation is complicated and time-consuming. There is a risk of injury.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and makes it easy to process by spraying a processing liquid for heating and cooling on an object to be processed. It is an object of the present invention to provide a heat treatment apparatus that can be reduced in size to make the entire apparatus compact, reduce installation space, and can easily and quickly change over heating / cooling of an object to be processed and change processing temperature conditions. .

[0008]

In order to achieve the above object, a heat treatment apparatus according to the present invention is provided with a processing tank provided with a spray nozzle capable of taking in and out a processing object and spraying a processing liquid onto the processing object. And a storage tank (storage tank) for storing the processing liquid. The processing liquid is sprayed onto the processing object in the processing tank from the spray nozzle to maintain the processing object at a predetermined temperature. Or, a spray type heat treatment apparatus for giving a thermal shock to the object to be processed, and simultaneously or selectively aspirate the processing liquid in the storage tank and the processing tank simultaneously, and the sucked processing liquid A piping is provided via a circulation pump so that both can be fed to the storage tank and the processing tank simultaneously or selectively, and a heat exchanger is provided in the middle of the piping.

According to the heat treatment apparatus of the present invention having the above-described structure, the processing solution stored in the storage tank while being maintained at the preset temperature in a state where the processing object is stored in the processing tank is processed. It can be heated and cooled by spraying from the spray nozzle in the inside toward the object to be processed. Further, since the processing liquid sprayed into the processing tank is gradually stored in the processing tank, the storage amount of the processing liquid is small according to the amount of the processing liquid stored in the processing tank, that is, the storage amount of the processing liquid is low (lower ), The processing liquid in the storage tank is supplied to the spray nozzle and sprayed on the object to be processed. Conversely, when the storage amount of the processing liquid is large (high order), the processing liquid in the processing tank is heated. Circulated to the storage tank via the exchanger and sprayed from the spray nozzle onto the object to be processed, and when the storage amount of the processing liquid is medium (medium), the processing liquid in the storage tank and the processing tank Each of the processing liquids is sucked by a circulation pump and supplied to the spray nozzle to spray on the workpiece.
It is possible to spray the processing object while effectively maintaining the set temperature according to the amount of the processing liquid stored in the processing tank. As described above, since the processing liquid for heating or cooling is sprayed onto the processing target, the processing is performed, so that the processing target is immersed in the processing liquid in the storage tank storing the processing target at the set temperature, and the processing is performed in comparison with the conventional apparatus. Since the liquid storage tank requires only a small capacity, it can be downsized to make the entire apparatus compact and reduce the installation space.

According to a second aspect of the present invention, a high-temperature liquid storage tank for heating and a high-temperature liquid heat exchanger and a low-temperature liquid storage tank for cooling and a low-temperature liquid heat exchanger are used to supply the processing liquid.
A set of systems is provided, a heat retaining structure is provided on the outer wall of each storage tank and each heat exchanger, and either the high-temperature heating liquid or the low-temperature cooling liquid is selectively supplied to the spray nozzle in the processing tank. Open / close valve can be interposed in the high-temperature liquid circulation system piping and the low-temperature liquid circulation system piping, respectively.

According to the heat treatment apparatus of the present invention, since the storage tank has a heat retaining structure, the temperature of the high-temperature liquid and the low-temperature liquid as the processing liquid to be stored does not easily change, and the high-temperature liquid and the low-temperature liquid are separated. By circulating through the respective heat exchangers, it is possible to easily and accurately maintain a predetermined set temperature. In particular, in the case of performing a heating treatment and a cooling treatment alternately by spraying a high-temperature liquid on the object to be processed in a thermal shock test or the like, for example, and then spraying a low-temperature liquid, the object is held at a preset temperature and stored. The high-temperature liquid or low-temperature liquid is sucked from the storage tank, and at the same time, the processing liquid absorbed from the bottom of the processing tank is mixed and sprayed, so that the processing (test) conditions such as heating and cooling of the workpiece are switched, and the temperature of the processing liquid The condition can be changed accurately and easily and quickly.

According to a third aspect of the present invention, when the processing tank is provided with a supply / exhaust port, the supply / exhaust port is configured to be openable and closable,
By opening only when air supply and exhaust are required, the atmosphere in the processing tank can be brought to room temperature in a thermal shock test or the like (so-called room temperature exposure). In addition, a device for forced ventilation (ventilation device whose temperature can be adjusted as necessary) is provided, and when, for example, steam or cooling gas is sprayed from the spray nozzle onto the workpiece, or when heating is performed. When a gas is generated from the object to be processed, it can be forcibly ventilated and discharged from the exhaust port.

According to a fourth aspect of the present invention, a liquid reservoir having a drain port is formed at the bottom of the processing tank, and a circulating pump for the heating high-temperature liquid storage tank and a liquid pump are provided in the liquid reservoir. It is preferable to provide a circulation pump side opening / closing valve, a circulation pump to the cooling low-temperature liquid storage tank, and an operation switching level switch such as the circulation pump side opening / closing valve.

According to the heat treatment apparatus of the present invention, when alternately performing different temperature treatments such as a heating treatment and a cooling treatment for the object to be treated, the treatment liquid (for example, high temperature High temperature liquid when switching from low to low)
Is almost completely sucked out by the circulating pump, and the level switch detects this state when it is empty or almost empty, and the circulating pump and the on-off valve on the circulating pump on the processing liquid (high-temperature liquid) side in the liquid pool. And the other processing liquid (low temperature liquid)
The operation and the open / close state of the circulating pump and the circulating pump side opening / closing valve are switched, and the low-temperature liquid is supplied into the processing tank to start the cooling process. For this reason, the user only needs to perform a simple operation such as replacing the object to be processed, and the processing can be almost automatically performed thereafter.

According to a fifth aspect of the present invention, the on-off valve is
(Outlet side) It is preferable to use a three-way switching valve capable of adjusting the flow rate independently to the two directions since the configuration of the piping system is simplified.

According to the heat treatment apparatus of the fifth aspect, for example, as shown in FIG. 4, the valve body is rotated by about 90 ° in a specific direction (clockwise or counterclockwise) from a neutral state (FIG. 4A). This changes the flow direction (supply direction) of the processing liquid from two directions to one direction. Further, the valve body is moved from the neutral state (FIG. 4A) to a specific direction by several tens of degrees (for example, 10 to 20 degrees).
By rotating, only the flow rate (supply amount) in one direction is reduced while the flow direction of the processing liquid remains in two directions (FIG. 4B).
Arbitrary flow rate adjustment such as is possible. Therefore, in each of the heat treatment apparatuses according to claims 1 to 4, the flow rate (aspiration amount) of the processing liquid from the storage tank and the processing tank, or the flow rate (supply amount) of the processing liquid to the storage tank and the processing tank, etc. Can be accurately and reliably adjusted, and the temperature of the processing liquid sprayed onto the workpiece from the spray nozzle of the processing tank can be accurately maintained at a predetermined temperature.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a spray heat treatment apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is an overall front view schematically showing an embodiment in which the present invention is applied to a spray-type thermal shock test apparatus.
3 is a partial front view schematically showing a part of another embodiment of the piping system of the spray-type thermal shock test apparatus of FIG. 1, and FIG. 3 is another embodiment of the treatment tank in the spray-type thermal shock test apparatus of FIG. 3 is a partial front view schematically showing a part of FIG.

As shown in FIG. 1, the spray-type thermal shock test apparatus 1 of the present embodiment has a processing tank 2 in the center, and a circulating system H for cooling a high-temperature liquid h for heating and cooling. The circulating system C for the low-temperature liquid c for use is independently provided on the left and right sides. The processing tank 2 has an air supply port 2a on one of its top surfaces and an exhaust port 2b on the other. A support 3 on which a sample s to be processed is placed is disposed slightly above the intermediate position in the vertical direction in the processing tank 2, and the sample s is provided on one side of the side wall of the processing tank 2. Storage port 4 for storing on the support base 3
Is provided, and an opening / closing door 4a is mounted. An outlet 5 is provided on the side opposite to the storage opening 4, and the outlet 5 is also provided with an opening / closing door 5a.
Is installed. The sample s may be hung in the processing tank 2 with a hanging tool or the like.

Above the support 3 in the processing tank 2, a spray nozzle 6 is disposed downward. The lower part of the support base 3 is configured as a storage part 2d for the processing liquid (high-temperature liquid or low-temperature liquid in this example) sprayed from the spray nozzle 6, and an outlet 2c is opened at the center of the bottom of the storage part 2d. I have. Outlet 2c
Is connected to a discharge pipe 7. This discharge pipe 7 is branched at a downstream end. One branch pipe 7 a is connected to a three-way switching solenoid valve 14 as an on-off valve of the circulation system H, and the other branch pipe 7 b is connected to the circulation system. The three-way switching solenoid valve 24 as an open / close valve of C is connected to each. The discharge pipe 7 is provided with an electromagnetic on-off valve 9 with a flow switch and a temperature sensor 10 in this order from the discharge port 2c side. Instead of providing the electromagnetic on-off valve 9 with a flow switch, the three-way switching electromagnetic valves 14 and 24 and the circulating pumps 12 and 22 described later may be operated only by the flow switch. A supply pipe 8 for supplying the processing liquid to the spray nozzle 6 is connected to the spray nozzle 6, the supply pipe 8 is branched at the upstream end, and one branch pipe 8a is provided with a three-way switching electromagnetic valve 15 as an on-off valve for the circulation system H. And the other branch pipe 8b is provided with a three-way switching solenoid valve 25 as an on-off valve of the circulation system C.
Connected to each other. further. Two level sensors 31 and 32 are arranged in the storage part 2d in the processing tank 2 at intervals in the vertical direction.

A heating high-temperature liquid circulation system H on the left side of the processing tank 2 includes a head tank (storage tank) 11 for storing the high-temperature liquid h, a circulation pump (suction / supply pump) 12, and a heat pump. Exchanger 13 and two sets of three-way switching solenoid valves 1
4.15. The head tank 11 has a heat retaining structure in which the outside of the tank main body 11a is covered with a heat retaining material 11b, and has an inlet 11c and an outlet 11d for the high-temperature liquid h. In the head tank 11, two level sensors 33 and 34 are arranged at an interval above and below. Further, a temperature sensor 35 is provided immediately below the level sensor 34 of the head tank 11. The supply port 16 is connected between the inflow port 11c and the three-way switching solenoid valve 15, and the discharge pipe 17 is connected between the outflow port 11d and the three-way switching solenoid valve 14, and a temperature sensor 36 is connected to the discharge pipe 17. Is interposed. These connection orders may be changed as appropriate, and equipment may be added or omitted as necessary. A three-way switching solenoid valve 15 on the supply side (discharge side) and a three-way switching solenoid valve 14 on the discharge side (suction side) are connected by a circulation pipe 18, and the three-way switching solenoid valve 14 is connected to the circulation pipe 18 from the three-way switching solenoid valve 14 side. A circulation pump 12, a temperature sensor 37, a heat exchanger 13, and a temperature sensor 38 are interposed in this order over the solenoid valve 15.

On the other hand, a circulating system C for cooling low-temperature liquid on the right side of the processing tank 2 includes a head tank (storage tank) 21 for storing the low-temperature liquid c, a circulation pump (suction / supply pump) 22, , A heat exchanger 23 and two sets of three-way switching solenoid valves 24 and 25. The head tank 21 has a heat retaining structure in which the outside of the tank main body 21a is covered with a heat retaining material 21b, and includes an inlet 21c and an outlet 21d for the high-temperature liquid h. Also, two level sensors 43 and 44 are arranged in the head tank 21 with a vertical interval. Furthermore, the level sensor 44 of the head tank 11
A temperature sensor 45 is provided immediately below the temperature sensor 45. The inflow port 21c and the three-way switching solenoid valve 25 are connected by a supply pipe 26, and the outflow port 21d and the three-way switching solenoid valve 24 are connected by a discharge pipe 27. Is interposed. These connection orders may be changed as appropriate.

A three-way switching solenoid valve 25 on the supply side (discharge side) and a three-way switching solenoid valve 24 on the discharge side (suction side) are connected by a circulation pipe 28.
A circulation pump 22, a temperature sensor 47, a heat exchanger 23, and a temperature sensor 48 are arranged in this order from the side to the three-way switching solenoid valve 25.

The solenoid on-off valve 9 with a flow switch, the temperature sensor 10, the level sensors 31 and 32, the circulating pumps 12 and 22, the three-way switching solenoid valves 14, 15, 24 and 2
5. The level sensors 33, 34, 43, 44 and the temperature sensors 35 to 38, 45 to 48 are connected to the controller 30 as a controller by a pilot line.

The spray-type thermal shock test apparatus 1 according to the present embodiment is constructed as described above. The mode of use of the thermal shock test apparatus 1 will be described with reference to FIG.

1) Parts as test samples (workpieces)
Is placed on the support 3 in the processing tank 2 from the storage opening 4 by opening the opening / closing door 4a, and the opening / closing door 4a is closed.

2) In the present embodiment, in the heating circulation system H, the high-temperature liquid h in the head tank 11, which is maintained in advance at the set temperature (heating temperature + α ° C.) while circulating the heat exchanger 13, is supplied in three directions. Switching solenoid valve 14, circulation pump 12,
After passing through the heat exchanger 13, it is supplied to the processing tank 2 via the three-way switching electromagnetic valve 15 and sprayed from the spray nozzle 6 onto the sample s. Since the high-temperature liquid h in the head tank 11 is maintained at the specified temperature, the temperature of the high-temperature liquid h sprayed does not affect even if the temperature of the high-temperature liquid h decreases due to the influence of the sample s. When this state is continued and the high-temperature liquid h accumulates in the storage part 2d to some extent, the suction is started by the circulation pump 12 and the head tank is discharged from the discharge port 2c through the discharge pipe 7, the branch pipe 7a, and the three-way switching solenoid valve 14. While the mixture mixed with the high temperature liquid h sucked from 11 is heated to a predetermined temperature by the heat exchanger 13 (initially, the temperature is lowered by being sprayed on the specimen s, so that the high temperature liquid h in the storage unit 2d is reduced). Is lower than the set temperature), the three-way switching solenoid valve 15, the branch pipe 8a,
It is supplied to the processing tank 2 via the supply pipe 8 and sprayed from the spray nozzle 6 onto the sample s. In this state, there is a possibility that the temperature of the high temperature liquid h in the storage section 2d is considerably low,
By mixing with the high-temperature liquid h in the head tank 11, the amount of heating by the heat exchanger 13 can be reduced.

When the high temperature liquid h in the head tank 11 becomes lower, the high temperature liquid h has been transferred to the storage section 2d in the processing tank 2. At that time, the high temperature liquid h is stored in the storage section 2d.
Since the temperature of the high-temperature liquid h in d is considerably increased, even if the entire amount is sucked by the circulation pump 12 and supplied to the treatment tank 2 through the circulation pipe 18, the heat exchange provided in the circulation pipe 18 Vessel 1
3 allows sufficient heating to the set temperature. Therefore, thereafter, the entire amount is sucked by the circulation pump 12 and
And is circulated into the processing tank 2 while being heated by the heat exchanger 13 and sprayed from the spray nozzle 6.

The flow rate of spray from the spray nozzle 6 and the flow rate returned to the head tank 11 are determined by the three-way switching solenoid valves 14.1
For example, by using a three-way switching solenoid valve (FIG. 4) having a structure capable of adjusting a flow rate, which will be described later, the adjustment can be performed simply and accurately.

3) On the other hand, the circulation pump 22 of the cooling circulation system C is operated at the same time, and the temperature is measured by the temperature sensors 47 and 48 while circulating the low-temperature liquid c in the cooling circulation system C. The temperature of the low-temperature liquid c in the head tank 21 is maintained at a set temperature (cooling temperature−β ° C.) by cooling with the heat exchanger 23.

4) After the heating test is completed by spraying the high-temperature liquid h on the part s, the open / close states of the three-way switching solenoid valves 14 and 15 and the three-way switching solenoid valves 24 and 25 are reversed to switch the low-temperature liquid. The cooling test is conducted by spraying c on the part s.

When the processing liquid sprayed from the spray nozzle 6 is switched from the high-temperature liquid h to the low-temperature liquid c from the heating to the cooling, that is, the high-temperature liquid h in the storage section 2d remains as small as possible. Aspirate and remove. That is, even after the spraying is stopped, the suction is performed by the circulation pump 12 until the flow switch 9 operates. Otherwise, the next time the cooling test is performed, a considerable amount of the high-temperature liquid h will remain, hindering the cooling test. The high-temperature liquid h
Is transferred to the head tank 11.

5) The spraying procedure of the low-temperature liquid c is performed according to the above-described spraying procedure of the high-temperature liquid h. This is basically the treatment tank 2
When the liquid level of the processing liquid (the high-temperature liquid h or the low-temperature liquid c) stored in the storage section 2d of the inside reaches a high level, the processing liquid in the processing tank 2 is entirely sucked by the circulation pump 12/22. It is necessary, but until the liquid level of the processing liquid in the processing tank 2 reaches a high level, the processing liquid in the processing tank 2 is gradually reduced by a circulating pump 12/2.
2 and a large amount of the processing liquid constantly maintained at the set temperature in the head tank 11/21 can be supplied to the processing tank 2 and sprayed on the specimen s.
Even when performing a thermal shock test requiring a change in cooling, even a small-capacity (ie, small) heat exchanger can generate a processing liquid at a set temperature. Further, when the temperature of the processing liquid in the processing tank 2 for heating or cooling approaches the processing temperature, the entire amount of the processing liquid to be sprayed is sucked from the processing tank 2 by the circulation pump 12/22. Exchanger 13/23
The temperature can be controlled to the set temperature simply by passing through.

As described above, when all the impact tests are completed, the processing liquid in the processing tank 2 is almost completely drained, returned to the head tank 11/21, and then heat-exchanged in each circulation system H / C. It is circulated through the vessel 13/23 and controlled so as to be maintained at the set temperature.

FIGS. 5 and 6 show the test apparatus 1 of the above embodiment.
Is a chart showing an example of a flow at the start of spraying of the processing liquid (here, the high temperature liquid for heating h) and at the time of stopping the spraying. At the start of spraying, in FIG. 5, when a start signal is transmitted to the controller 30 by turning on a start switch or the like, it is detected whether or not the circulation pump 12 (/ 22) is in the operating state, and it is determined that the circulating pump 12 (/ 22) is not in the operating state (NO). The circulation pump 12 (/ 22) is started. Operating state (YE
S), the flow direction of the discharge side three-way electromagnetic switching valve 15 is switched from the circulation state on the head tank 11 side to the spray state on the processing tank 2 side. The liquid surface position of the high-temperature liquid h in the processing tank 2 is detected by the level sensor 32 (FIG. 1) and remains as it is until the low level is detected. Side three-way switching solenoid valve 14
, The head tank 11 side is fully opened and the processing tank 2 side is fully closed, but the processing tank 2 side is slightly opened. The liquid surface position of the high-temperature liquid h in the processing tank 2 is detected by the level sensor 31 (FIG. 1), and when the high level (YES) is detected, the opening (inlet) of the suction side three-way switching electromagnetic valve 14 from the processing tank 2 is opened. The head tank 11 is fully opened and the head tank 11 side is fully closed. Thereafter, a steady state is set. The high-temperature liquid h in the processing tank 2
Prior to the step of detecting the liquid level, there is a step of detecting the temperature of the high-temperature liquid h and controlling the temperature to the set temperature, but is omitted in the flowchart of FIG.

Next, when the spraying is stopped after the heat shock test is completed, in FIG.
When the stop signal is transmitted to the controller 30 by F, the opening (outflow port) to the processing tank 2 of the discharge-side three-way switching solenoid valve 15 that supplies the high-temperature liquid h to the spray nozzle 6 becomes fully closed, and The opening (outflow port) to the head tank 11 side is fully opened. The discharge of the high-temperature liquid h from the discharge port of the processing tank 2 is zero or the high-temperature liquid h in the storage unit 2d
Is low or low by the level sensor 32, and if it is either zero or low (YES), the opening (inlet) of the suction side three-way switching solenoid valve 14 from the processing tank 2 is fully closed. At the same time, the opening (inlet) from the head tank 11 side is opened to the fully opened state. As a result, the high temperature liquid h enters a circulating state. It should be noted that after the circulation state, there is a step of detecting the temperature of the high-temperature liquid h and controlling the temperature to the set temperature, but is omitted in the flowchart of FIG.

FIG. 2 is a piping diagram showing another embodiment of the heat exchanger. In the piping system shown in FIG.
The processing liquid on the side of the processing tank 2 and the processing liquid on the side of the processing tank 2 are mixed to form a heat exchanger 13/23.
In this example, the processing liquid from the head tank 11 side and the processing liquid from the processing tank side are heated or cooled by separate heat exchangers 13/23/51/54, respectively, as shown in FIG. Become. Therefore, the heat exchanger 13/23 on the head tank 11/21 side only plays a role of adjusting the temperature, so that the heat exchanger 13/23 requires a small capacity and can be miniaturized. Since the temperature difference between the processing liquids can be increased, the size of the processing liquid can be reduced, and the temperature of the processing liquid can be easily controlled. In this piping system, as shown in FIG. 2, the heating heat exchanger 13 / cooling heat exchanger 23 and the temperature sensors 37, 38/47, which are provided in the middle of the circulation pipe 18/28 in FIG.・ 48 are connected to the discharge pipe 1
7/27 and a separate heating heat exchanger 5
1 / cooling heat exchanger 54 and temperature sensors 52/53 /
The difference is that 55 and 56 are interposed between the branch pipe 7a / branch pipe 7b with the three-way switching solenoid valve 14/24 interposed therebetween. Regarding another configuration of the test apparatus 1 ′ of the present embodiment,
This is common to the test apparatus 1 of the first embodiment.

FIG. 3 is a partial front view schematically showing a part of another embodiment of the processing tank. In this embodiment, a liquid pool 2e is formed at the bottom of the processing tank 2 ', and the liquid pool 2e is formed. A level switch 41 is provided in the vicinity of the bottom end of the circulating pump 12.
The point that the start / stop operation of / 22 is performed is different from the apparatuses 1 and 1 'of the above embodiment. Other configurations and operations are the same as those of the test apparatus 1 of the first embodiment, and thus detailed description is omitted.

FIGS. 4 (a) and 4 (b) show another embodiment of the three-way switching valve according to claim 5, in which the three-way switching valve 15 '(25') has a valve body 81a. It has a structure provided with a flow rate adjusting function lacking in the conventional general switching valve 81 provided (FIGS. 8A and 8B). That is, as shown in FIG. 4, the three-way switching valve 15 'is connected to the circulation pipe 18 of the valve body 15a.
The opening area of the inlet 15b from the outlet 15c
d, the head tank 11 and the processing tank 2
From the state in which the flow rate to the processing tank 2 is the same (FIG. 4A), the state in which the flow rate to the processing tank 2 side is reduced compared to the flow rate in the head tank 11 side (FIG. 4B), or not shown. Yes, but processing tank 2
It can be arbitrarily adjusted even when the flow rate on the head tank 11 side is narrowed compared to the flow rate on the side. That is, the structure of the valve body 81a is different from that of the switching valve 81.

Although the configuration is complicated, FIG.
As shown in the figure, the circulation pipe 18, the supply pipe 16 and the branch pipe 8 a are integrally connected and the supply pipe 16 and the branch pipe 8 a are provided with flow rate adjusting / opening / closing valves 61 and 62, respectively. The flow rate from the pipe 18 to the head tank 11 and the processing tank 2 can be arbitrarily adjusted.

Although the thermal shock test apparatus as an embodiment of the spray heat treatment test apparatus of the present invention has been described above, the present invention can be implemented as follows.

A) When one of the heating and cooling treatments is performed on the object to be treated, either the treatment tank 2 and the circulation system H for the high-temperature liquid for heating or the circulation system C for the low-temperature liquid for cooling are used. You only need to combine

B) A special solution such as a high-temperature liquid or a cold-temperature liquid is usually used as the processing liquid. However, when the high-low temperature range is narrow, water may be used.

C) Not only the impact test but also a heat treatment of parts, a cleaning treatment with a cleaning liquid, a durability test at room temperature by being left in the air at a room temperature, a wide range of various uses. Available.

[0045]

As is apparent from the above description,
The spray heat treatment apparatus according to the present invention has the following excellent effects.

(1) According to the first aspect of the present invention, since a treatment liquid for heating or cooling is sprayed on the object to be treated,
Compared to the conventional equipment that immerses the processing object in the processing liquid in the storage tank that stores the processing liquid at a set temperature, the processing liquid storage tank requires a smaller capacity than the conventional equipment. Can be reduced. Further, since the processing is performed by spraying, the processing becomes easy, and switching of heating / cooling of the processing target and the change of the processing temperature condition can be performed easily and in a short time.

(2) According to the second aspect of the present invention, since the storage tank and the heat exchanger maintained at an appropriate temperature are used in combination, not only both of them can be reduced in size but also the processing temperature can be appropriately and easily maintained. Since the storage tank has a heat retaining structure, the temperature of the high-temperature liquid and the low-temperature liquid as the processing liquid to be stored does not easily change, and the high-temperature liquid and the low-temperature liquid are circulated through the heat exchanger, respectively. It can be easily and accurately maintained at the set temperature. Especially when the heating and cooling are alternately sprayed, for example, by alternately spraying a high-temperature liquid and a low-temperature liquid on the object to be processed, the high-temperature liquid or the low-temperature liquid is stored in a storage tank that is stored at a preset temperature. Since the processing is performed by spraying the liquid, it is possible to easily and quickly change the processing conditions such as heating and cooling of the object to be processed and change the temperature conditions of the processing liquid.

(3) According to the third aspect of the present invention, if the processing tank is provided with a supply / exhaust port and the supply / exhaust port can be opened and closed,
In a thermal shock test, etc., the atmosphere in the processing tank can be brought to room temperature (so-called room temperature exposure) and can be opened only when air supply and exhaust are required. When a gas is generated from the object to be processed during spraying or during heating, the air can be forcibly ventilated and discharged from the exhaust port.

(4) According to the fourth aspect of the present invention, when the process is switched from the heating process to the cooling process or from the cooling process to the heating process, almost no residual processing liquid accumulated in the liquid pool at the bottom of the processing tank can be sucked by the circulation pump. Therefore, the processing liquid used in the pre-processing does not adversely affect the temperature control of the processing liquid in the next processing, and the processing can be performed accurately and reliably at a preset temperature. When the processing liquid accumulated in the liquid pool at the bottom of the processing tank is empty or almost empty, the level switch detects this state, and the circulation pump on the processing liquid side of the liquid pool and the three-way pump on the circulation pump side Since the operation of the switching valve and the operation of the circulation pump on the processing liquid side having a different temperature and the three-way switching valve on the circulation pump side are automatically switched, the low-temperature liquid is supplied into the processing tank and the cooling process is started. By simply performing simple work such as replacing the object to be processed, the processing is almost automatically performed, the burden on the operator is reduced, and the work efficiency is improved.

(5) In the invention according to claim 5, the flow rate (suction amount) of the processing liquid from the storage tank and the processing tank, or the storage tank and the processing in each of the heat treatment apparatuses according to the first to fourth aspects. The flow rate (supply amount) of the processing liquid to the tank can be adjusted accurately and reliably, and the temperature of the processing liquid sprayed onto the workpiece from the spray nozzle of the processing tank can be accurately maintained at a predetermined temperature. it can.

(6) Each of the above effects is particularly effective when the heat capacity of the object is small.

(7) Since the object to be processed is exposed to air by spraying the processing liquid, the effect can be obtained in a shorter time in a corrosion test or the like than in an immersion test.

[Brief description of the drawings]

FIG. 1 is an overall front view schematically showing an embodiment in which the present invention is applied to a spray-type thermal shock test apparatus.

FIG. 2 is a partial front view schematically showing a part of another embodiment of the spray-type thermal shock test apparatus of FIG.

FIG. 3 is a partial front view schematically showing a part of another embodiment of the treatment tank in the spray-type thermal shock test apparatus of FIG. 1;

FIGS. 4A and 4B show three-way switching solenoid valves 14 and 15;
FIG. 4 is a sectional view showing another embodiment (24/25) of FIG.
4A illustrates a neutral state, and FIG. 4B illustrates a state in which one outflow amount is reduced. FIG. 4C is a partial schematic front view showing a structure for suspending a flow rate in a direction without using a three-way switching electromagnetic valve.

FIG. 5 is a flow chart at the start of spraying a processing liquid (here, a high-temperature liquid for heating h) in the test apparatus 1 according to the embodiment of the present invention.

FIG. 6 is a flowchart of the test apparatus 1 according to an embodiment of the present invention when spraying of a processing liquid (here, a high-temperature liquid for heating h) is stopped.

FIG. 7 is a front view schematically showing a conventional general thermal shock test apparatus 70.

8 (a) and 8 (b) show a conventional general switching valve 81.
FIG. 8A shows a neutral state, and FIG.
(B) shows a state in which the outflow path is switched to one side.

[Explanation of symbols]

 1 ・ 1 ′ Spray-type thermal shock test device 2.2 ・ 2 Treatment tank 3 Support 4 Storage port 5 Outlet 6 Spray nozzle 7 Discharge pipe 8 Supply pipe 9 Electromagnetic open / close valve 11 ・ 21 Head tank (storage tank / storage tank) 12.22 circulation pump (suction / supply pump) 13.23 heat exchanger 14.15.24.25 three-way switching solenoid valve (open / close valve) 18.28 circulation pipe 30 controller 31-34 level sensor 10.36-38 Temperature sensor s Sample (object to be processed) h High temperature liquid (processing liquid) c Low temperature liquid (processing liquid) H High temperature liquid circulation system for heating C Low temperature liquid circulation system for cooling

Claims (5)

[Claims] 1. A processing tank provided with a spray nozzle capable of taking in and out an object to be processed and spraying a processing liquid onto the object to be processed, and a storage tank storing the processing liquid. A spray-type heat treatment apparatus for holding a processing object at a predetermined temperature by spraying a processing liquid onto the processing object from the spray nozzle or applying a thermal shock to the processing object, While simultaneously or selectively sucking the processing liquid in the tank and in the processing tank, a circulation pump is interposed so that the sucked processing liquid can be simultaneously or selectively supplied to both the storage tank and the processing tank. And a heat exchanger interposed in the middle of the pipe. 2. A system for supplying the treatment liquid is provided with two sets of a high-temperature liquid storage tank for heating and a high-temperature liquid heat exchanger, and a low-temperature liquid storage tank for cooling and a low-temperature liquid heat exchanger. An on-off valve for selectively supplying either a high-temperature heating liquid or a low-temperature cooling liquid to the spray nozzle in the processing tank is provided on the outer wall of the tank and each heat exchanger. The spray heat treatment apparatus according to claim 1, wherein the spray-type heat treatment apparatus is provided in the liquid circulation system pipe and the low-temperature liquid circulation system pipe, respectively. 3. The spray heat treatment apparatus according to claim 1, wherein a supply / exhaust port is provided in the treatment tank. 4. A liquid reservoir having a drainage port formed at the bottom of the processing tank, and a circulation pump to the heating high-temperature liquid storage tank and a circulation pump-side opening / closing valve in the liquid reservoir. The spray type heat treatment apparatus according to claim 2 or 3, further comprising an operation switching level switch such as a circulation pump to the low-temperature liquid storage tank for cooling and an on-off valve on the circulation pump side. 5. The spray heat treatment apparatus according to claim 1, wherein the on-off valve is a three-way switching valve capable of adjusting a flow rate independently to two directions.