JP2018202324A - Injection test device - Google Patents

Abstract

To provide an injection test device capable of simply performing a test for groping for suitable injection conditions.SOLUTION: Liquid is stored in a tank 3 and compressed air is supplied to a first air pipe line 26. A second air pipe line 27 is branched from the first air pipe line 26, is communicated to an upper part in the tank 3 and increases an inner pressure of the tank 3 by supplying compressed air. A liquid pipe line 39 is communicated with a lower part in the tank 3 and liquid stored in the tank 3 is circulated through the liquid pipe line 39. An injection nozzle is communicated with a downstream end of the first air pipe line 26 and a downstream end of the liquid pipe line 39 and injects liquid circulated through the liquid pipe line 39 together with compressed air supplied from the first air pipe line 26. Pressure changing means 13, 14 can change a supply pressure of compressed air and a supply pressure of liquid with respect to the injection nozzle individually. Air pressure detection means 15 detects a supply pressure of compressed air with respect to the injection nozzle. Liquid pressure detection means 16 detects a supply pressure of liquid with respect to the injection nozzle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ejection test apparatus that ejects liquid from an ejection nozzle.

  Patent Document 1 describes a mold cooling device. In this mold cooling apparatus, a cooling pipe is inserted and disposed in a cooling hole drilled in the mold, and the cooling water whose water amount is adjusted by the flow rate control valve and the pressure adjusting valve is combined with the compressed air, and is connected to one end of the cooling pipe. It is injected from the injection port to the bottom of the cooling hole.

Japanese Patent Laid-Open No. 5-220562

  When the mold is cooled by injection (spraying) of cooling water as in the mold cooling device of Patent Document 1, the cooling effect depends on the injection angle and the injection shape of the cooling water with respect to the mold. The injection shape changes depending on the supply pressure of cooling water and compressed air. For this reason, the injection conditions (injection angle, cooling water and compressed air supply pressure) capable of efficiently cooling the mold are searched in advance by tests, and the actual manufacturing time is determined based on the injection conditions determined to have a high cooling effect. It is preferable to set these conditions.

  However, in the mold cooling apparatus used in the production line, it is difficult to visually check the state of the actually injected coolant, and thus it is difficult to conduct a test for searching for injection conditions with a high cooling effect.

  Then, this invention aims at provision of the injection test apparatus which can perform the test for searching suitable injection conditions easily.

  In order to achieve the above object, an injection test apparatus according to a first aspect of the present invention includes a tank, a first air line, a second air line, a liquid line, an injection nozzle, and pressure changing means. And an air pressure detecting means and a hydraulic pressure detecting means.

  Liquid is stored in the tank, and compressed air is supplied to the first air pipe. The second air pipe branches from the first air pipe and communicates with the upper part in the tank, and increases the internal pressure of the tank by supplying compressed air. The liquid pipe line communicates with the lower part in the tank, and the liquid stored in the tank flows through the liquid pipe line. The injection nozzle communicates with the downstream end of the first air conduit and the downstream end of the liquid conduit, and injects the liquid flowing through the liquid conduit together with the compressed air supplied from the first air conduit.

  The pressure changing means can individually change the supply pressure of the compressed air and the supply pressure of the liquid to the injection nozzle. The air pressure detecting means detects the supply pressure of the compressed air to the injection nozzle. The liquid pressure detecting means detects the supply pressure of the liquid to the ejection nozzle.

  In the injection test using the above-described injection test apparatus, the injection angle of the injection nozzle is adjusted, and the supply pressure of the compressed air and the supply pressure of the liquid to the injection nozzle are individually adjusted by the pressure changing means, and the injection is injected from the injection nozzle. By visually recognizing the injection angle and shape of the liquid to be sought, a suitable injection condition for the mold (for example, an injection condition (an injection angle, supply pressure of liquid and compressed air) that can cool the mold efficiently) is sought. To decide.

  In this jet test apparatus, since the liquid stored in the tank is supplied to the jet nozzle, it is not necessary to supply the liquid from an external supply source during the test. Further, since the supply pressure of the liquid is increased by using the air pressure of the compressed air, a pump for sending the liquid to the ejection nozzle is unnecessary. Therefore, a test for searching for suitable injection conditions can be easily performed.

  A second aspect of the present invention is the injection test apparatus according to the first aspect, and includes an injection target member and temperature detection means.

  The liquid jetted from the jet nozzle is sprayed on the jetting target member, and the temperature detecting means detects the temperature of the jetting target member.

  In the above configuration, since the temperature detection unit detects the temperature change of the injection target member, in addition to visual recognition of the injection shape, the cooling effect can be directly determined, and the determination of the injection conditions suitable for cooling the mold can be accurately performed. Can be done.

  According to the present invention, it is possible to easily perform a test for searching for suitable injection conditions.

It is a circuit diagram which shows typically the structure of the supply side of the compressed air and cooling fluid of the injection test apparatus which concerns on one Embodiment of this invention. It is a side view which shows typically the structure of the injection side of the cooling fluid of the injection test apparatus of FIG. It is a front view of the injection target member of FIG.

  Hereinafter, an injection test apparatus according to an embodiment of the present invention will be described with reference to FIGS. An injection test apparatus is divided roughly into the piping part 1 shown in FIG. 1, and the injection test part 2 shown in FIG.

  As shown in FIG. 1, the piping unit 1 is provided with a tank 3, an air piping system 10 through which compressed air flows, and a liquid piping system 30 through which a cooling liquid (cooling water in the present embodiment) flows. A plurality of parts constituting the pipe section 1 are fixed on the surface of the pipe section fixing plate 4 which is formed of a wooden board or the like and stands up. Each pipe constituting the air pipe system 10 and the liquid pipe system 30 may be a metal pipe or a resin pipe. In addition, about the 1st compressed air supply pipe 24, the 2nd compressed air supply pipe 25, and the cooling water supply pipe 38 which are mentioned later, it is preferable that it is a resin pipe for reasons, such as accommodation at the time of a non-test.

  The tank 3 has a bowl shape extending in the vertical direction, and is fixed to the pipe portion fixing plate 4 in an upright posture. A tank first connection pipe 8 that communicates with the upper part of the tank 3 is connected to the upper end of the tank 3, and a tank second connection pipe 9 that communicates with the lower part of the tank 3 is connected to the lower end of the tank 3. Has been. Cooling water flowing in from the tank second connection pipe 9 is stored in the tank 3, and a level gauge 5 that communicates the upper and lower parts of the tank 3 is provided on the side of the tank 3. A straight portion extending at least in the vertical direction of the level gauge 5 is formed by a transparent or semi-transparent thin tube, and the remaining amount of the cooling water in the tank 3 is determined by looking at the level of the cooling water in the level gauge 5 to the outside. Can be recognized from.

  The air piping system 10 includes a first air circulation pipe 11, a second air circulation pipe 12, a branch valve (three-way valve) 13, a regulator 14, a first pressure gauge (air pressure detection means) 15, a second A pressure gauge (hydraulic pressure detection means) 16, an exhaust pipe 17, an air injection branch pipe 18, and four on-off valves (first to fourth valves) 19, 20, 21, and 22 are provided. Each open / close valve 19, 20, 21, 22 opens / closes a pipeline to allow / block air flow.

  An air supply upstream connection port 23 is fixed to the upstream end of the first air circulation pipe 11. The air supply upstream connection port 23 communicates with a supply source of compressed air (for example, a compressor that generates compressed air, a compressed air pipe that is laid in advance to supply compressed air to various places in the facility, and the like). The supply pipe 6 is detachably connected. The first air circulation pipe 11 is provided with a first valve 19, a regulator 14, a branch valve 13, a first pressure gauge 15, and a second valve 20 from the air supply upstream connection port 23 toward the downstream side, One end (upstream end) of the first compressed air supply pipe 24 is connected to the downstream side connection port of the second valve 20. The other end (downstream end) of the first compressed air supply pipe 24 is detachably connected to a compressed air supply port 45 (shown in FIG. 2) of a cooling water injection nozzle (injection nozzle) 41, and the first air circulation pipe 11. The first compressed air supply pipe 24 constitutes a first air pipe 26 that supplies the compressed air flowing from the air supply pipe 6 to the cooling water injection nozzle 41.

  The air injection branch pipe 18 branches from the first air circulation pipe 11 between the first pressure gauge 15 and the second valve 20. The third valve 21 is connected to the downstream end of the air injection branch pipe 18, and one end (upstream end) of the second compressed air supply pipe 25 is connected to the downstream connection port of the third valve 21. The other end (downstream end) of the second compressed air supply pipe 25 is detachably connected to a compressed air supply port 47 (shown in FIG. 2) of the air injection nozzle 42.

  The second air circulation pipe 12 branches from the branch valve 13 and is connected to the tank first connection pipe 8, and the second pressure gauge 16 is provided in the second air circulation pipe 12. The exhaust pipe 17 branches from the second air circulation pipe 12 between the second pressure gauge 16 and the tank first connection pipe 8 and is opened to the atmosphere, and the fourth valve 22 is provided in the exhaust pipe 17. The second air circulation pipe 12 and the tank first connection pipe 8 increase the internal pressure in the tank 3 by supplying the compressed air flowing in from the air supply pipe 6 through the first air circulation pipe 11 to the upper part in the tank 3. A second air duct 27 is configured.

  The first pressure gauge 15 detects the internal pressure of the first air flow pipe 11 on the downstream side of the branch valve 13, and the second pressure gauge 16 detects the internal pressure of the second air flow pipe 12. The regulator 14 is a pressure regulator that can manually change the air pressure of the compressed air flowing into the branch valve 13. The branch valve 13 is on the flow path side (hereinafter referred to as an injection nozzle) toward the cooling water injection nozzle 41 and the air injection nozzle 42. A flow rate adjusting valve capable of independently increasing or decreasing the inflow amount of compressed air to the second air flow passage and the inflow amount of compressed air to the side toward the second air flow passage (tank 3 side) by manual operation. is there. By adjusting the regulator 14 and the branch valve 13, the internal pressure detected by the first pressure gauge 15 and the internal pressure detected by the second pressure gauge 16 can be individually increased or decreased to be set to a desired internal pressure. In the following description, unless specifically stated, the flow paths on both the injection nozzle side and the tank 3 side in the branch valve 13 are not closed (compressed air can flow).

  When the first valve 19 is closed, the supply of compressed air from the air supply pipe 6 to the first air pipe 26 is shut off, and the air supply pipe 6 is attached to and detached from the air supply upstream connection port 23 in this state. When the first to fourth valves 19 to 22 are all closed, the supply pipe 6 is connected to the supply upstream connection port 23, and the first valve 19 is opened, the cooling water injection nozzle 41 and the air injection nozzle 42 are reached. The compressed air can be supplied so that the compressed air can be supplied.

  The liquid piping system 30 is provided with a cooling water flow pipe 31, a flow meter 32, a drain pipe 33, and three open / close valves (fifth to seventh valves) 34, 35, and 36. Each open / close valve 34, 35, 36 opens / closes a pipe line to allow / block the flow of cooling water.

  A water supply upstream connection port 37 is fixed to the upstream end of the cooling water circulation pipe 31. A water supply pipe 7 communicating with a cooling water supply source (for example, a water tap) is detachably connected to the water supply upstream connection port 37. The cooling water circulation pipe 31 is provided with a fifth valve 34, a sixth valve 35, and a flow meter 32 from the water supply upstream connection port 37 toward the downstream side. One end (upstream end) of the cooling water supply pipe 38 is connected to the downstream side of the flow meter 32, and the other end (downstream end) of the cooling water supply pipe 38 is connected to the cooling water supply port 46 ( (Shown in FIG. 2) is detachably connected.

  The cooling water circulation pipe 31 branches in two directions between the fifth valve 34 and the sixth valve 35, one and the other of which are connected to the tank second connection pipe 9 and the drainage pipe 33, respectively. The valve 36 is provided in the drainage pipe 33.

  When the fifth valve 34 is closed, the supply of the cooling water from the water supply pipe 7 to the cooling water circulation pipe 31 is shut off, and the water supply pipe 7 is attached to and detached from the water supply upstream connection port 37 in this state. In the state where the coolant supply can be replenished with the water supply pipe 7 connected to the upstream water supply connection port 37 and all the fifth to seventh valves 34 to 36 closed, the tank first connection pipe 8 is opened to the atmosphere (for example, the first When the first valve 19 is closed and the fourth valve 22 is opened) and the fifth valve 34 is opened, the water supply pipe 7 is connected to the lower part of the tank 3 through the cooling water circulation pipe 31 and the tank second connection pipe 9. Cooling water flows in and is stored. When the storage amount of the cooling water increases, the liquid level of the level gauge 5 rises, the fifth valve 34 is closed in a state where the cooling water is sufficiently stored, and the supply of the cooling water into the tank 3 is finished. .

  When the cooling water is stored in the tank 3, all the fifth to seventh valves 34 to 36 are closed, the fourth valve 22 is closed, and the first valve 19 is opened, the cooling water in the tank 3 is compressed by compressed air. The pressurized cooling water can be supplied. When the sixth valve 35 is opened in such a cooling water supply enabled state, the pressurized cooling water is supplied from the tank 3 through the tank second connection pipe 9, the cooling water circulation pipe 31 and the water supply pipe to the cooling water injection nozzle 41. To be supplied. That is, the tank second connection pipe 9, the cooling water circulation pipe 31, and the cooling water supply pipe 38 constitute a liquid pipe 39 that supplies the cooling water stored in the tank 3 to the cooling water injection nozzle 41.

  In the compressed air supply enabled state and the cooling water supplied enabled state, the internal pressure of the first air flow pipe 11 and the internal pressure of the second air flow pipe 12 on the downstream side of the branch valve 13 are adjusted by adjusting the regulator 14 and the branch valve 13. Can be changed individually. That is, the regulator 14 and the branch valve 13 constitute pressure changing means that can individually change the supply pressure of the compressed air and the supply pressure of the cooling water to the cooling water injection nozzle 41. The first pressure gauge 15 functions as an air pressure detecting unit that detects the supply pressure of compressed air to the cooling water injection nozzle 41, and the second pressure gauge 16 is a liquid that detects the supply pressure of cooling water to the cooling water injection nozzle 41. It functions as a pressure detection means. The flow meter 32 functions as a flow rate detection unit that detects the flow rate of the cooling water flowing into the cooling water injection nozzle 41.

  When the test is performed by injecting cooling water and compressed air from the cooling water injection nozzle 41, the second valve 20 and the sixth valve are kept closed while the third valve 21 is closed from the compressed air supply enabled state and the cooling water supply enabled state. 35, when the test is performed by injecting compressed air from the air injection nozzle 42, the third valve 35 and the sixth valve 35 are closed while the compressed air can be supplied and the cooling water can be supplied. The valve 21 is opened.

  At the end of the test, all the open / close valves 19 to 22 and 34 to 36 are closed, and then the fourth valve 22 is opened. By opening the fourth valve 22, the exhaust pipe 17 connected to the second air pipe 27 is opened to the atmosphere, and the internal pressures of the air piping system 10 and the tank 3 are reduced to atmospheric pressure. Further, when the cooling water stored in the tank 3 is discharged because the injection test apparatus is not used for a long period of time, the seventh valve 36 is opened after the fourth valve 22 is opened at the end of the test. By opening the seventh valve 36, the drain pipe 33 connected to the liquid pipe 39 is opened to the atmosphere, and the cooling water in the tank 3 and the liquid pipe 39 is discharged from the drain pipe 33.

  As shown in FIG. 2, the injection test unit 2 includes a cooling water injection nozzle 41, an air injection nozzle 42, an injection target member 43, and a plurality (five in this embodiment) of thermocouples (temperature detection means). 44. The downstream end of the first compressed air supply pipe 24 is detachably connected to the compressed air supply port 45 of the cooling water injection nozzle 41, and the downstream of the cooling water supply pipe 38 is connected to the cooling water supply port 46 of the cooling water injection nozzle 41. The end is detachably connected, and the downstream end of the second compressed air supply pipe 25 is detachably connected to the compressed air supply port 47 of the air injection nozzle 42.

  The cooling water injection nozzle 41 and the air injection nozzle 42 are supported by a nozzle support unit 48. The nozzle support unit 48 includes a nozzle support base 49 placed on the floor surface 40, and two vertical shafts 50 (only one is shown in FIG. 2) fixed to the nozzle support base 49 and extending upward. The two horizontal shafts 51 (only one is shown in FIG. 2) that are supported so as to be slidable in the vertical and horizontal directions with respect to the vertical shaft 50 and fixed at an arbitrary position, and tilted to the horizontal shaft 51 A nozzle support 52 that is freely supported and fixed at an arbitrary position, and the cooling water injection nozzle 41 and the air injection nozzle 42 are fixed to the nozzle support 52. By changing the height of the horizontal shaft 51, the heights of the cooling water injection nozzle 41 and the air injection nozzle 42 with respect to the injection target member 43 are changed, and the horizontal position (crossover position) of the horizontal shaft 51 with respect to the vertical shaft 50 is changed. By changing, the horizontal distance between the injection target member 43 and the cooling water injection nozzle 41 and the air injection nozzle 42 is changed. By changing the angle of the nozzle support 52 with respect to the horizontal shaft 51, the cooling of the injection target member 43 is performed. The injection angles of the water injection nozzle 41 and the air injection nozzle 42 are changed.

  The injection target member 43 is a metal rectangular plate formed as a dummy of a mold used in the production line, and is fixed in a rectangular frame-shaped injection target member support frame 54. The injection target member support frame 54 has a heat insulating function of covering and maintaining the outer periphery of the injection target member 43, and is fixed and supported by the injection target member support base 53 placed on the floor surface 40. In such a state, the surface of the injection target member 43 faces the cooling water injection nozzle 41 and the air injection nozzle 42, and the cooling water injected from the cooling water injection nozzle 41 or the compressed air injected from the air injection nozzle 42. The spray target surface 43a is sprayed.

  As shown in FIG. 3, the five thermocouples 44 are arranged in a cross shape and embedded in the injection target member 43 so as to detect the temperatures of five locations on the injection target surface 43a. The number and arrangement of the thermocouples 44 can be arbitrarily set. Further, instead of the thermocouple 44, other temperature detection means such as a non-contact type temperature detection device may be provided.

  Next, an injection test using the above injection test apparatus will be described.

  When performing the cooling water injection test, first, as a preparatory work, the cooling water flows into the tank 3 to be stored. Specifically, the tank first connection pipe 8 is opened to the atmosphere in a state where the coolant supply can be replenished with the water supply pipe 7 connected to the water supply upstream connection port 37 and all the fifth to seventh valves 34 to 36 closed. (For example, the first valve 19 is closed and the fourth valve 22 is opened), the fifth valve 34 is opened, and the tank is supplied from the water supply pipe 7 through the cooling water circulation pipe 31 and the tank second connection pipe 9. Cooling water flows into 3.

  After the cooling water is sufficiently stored in the tank 3, the cooling water can be injected from the cooling water injection nozzle 41. Specifically, the first to fourth valves 19 to 22 are all closed, the air supply pipe 6 is connected to the air supply upstream connection port 23, and the downstream end of the first compressed air supply pipe 24 is connected to the cooling water injection nozzle. 41 is connected to the compressed air supply port 45 of 41, the downstream end of the cooling water supply pipe 38 is connected to the cooling water supply port 46 of the cooling water injection nozzle 41, and the first valve 19 is opened.

  Since the water supply pipe 7 may be removed from the water supply upstream connection port 37, when the cooling water supply source and the injection test unit 2 are separated from each other, the water supply pipe is connected to the water supply upstream connection port 37. 7 is removed, and the piping part 1 may be moved to the vicinity of the injection test part 2 together with the piping part fixing plate 4.

  In the cooling water injection test, the second valve 20 and the sixth valve 35 are opened to inject cooling water from the cooling water injection nozzle 41 with compressed air. At this time, while adjusting the injection angle of the cooling water injection nozzle 41 and adjusting the regulator 14 and the branch valve 13, the supply pressure of compressed air and the supply pressure of cooling water to the cooling water injection nozzle 41 are individually changed. In addition to visually recognizing the injection angle and the injection shape of the cooling water injected from the cooling water injection nozzle 41, the thermocouple 44 detects the temperatures of five locations on the injection target surface 43a. Thereby, the injection conditions suitable for cooling the mold (for example, the injection conditions (injection angle, cooling water and compressed air supply pressure) that can cool the entire mold uniformly and efficiently) are determined and determined. Further, the flow rate of the cooling water supplied to the cooling water injection nozzle 41 (the flow rate detected by the flow meter 32) is recorded.

  Suitable injection conditions obtained by the injection test are reflected in the mold cooling device of the actual production line. For example, in mold casting (die casting) on a production line, when a mold is cooled using a mold cooling device that sends cooling water to a cooling water injection nozzle by a pump, injection is performed based on the result of an injection test. The mold can be efficiently cooled by setting the angle, the supply pressure of compressed air, the supply pressure and flow rate of cooling water by the pump.

  Suitable injection conditions obtained by the injection test are reflected in the mold cooling device of the actual production line. For example, in mold casting (die casting) on a production line, when a mold is cooled using a mold cooling device that sends cooling water to a cooling water injection nozzle by a pump, injection is performed based on the result of an injection test. The mold can be efficiently cooled by setting the angle, the supply pressure of compressed air, the supply pressure and flow rate of cooling water by the pump.

  When a compressed air injection test is performed, the third valve 21 is opened instead of opening the second valve 20 and the sixth valve 35, and compressed air is injected from the air injection nozzle 42. At this time, while adjusting the injection angle of the air injection nozzle 42 and adjusting the regulator 14 and / or the branch valve 13, the supply pressure of the compressed air to the air injection nozzle 42 is changed, and the injection target surface 43a is changed by the thermocouple 44. The five temperatures are detected. Thereby, a suitable injection condition is searched and determined.

  According to the injection test apparatus of this embodiment, since the cooling water stored in the tank 3 is supplied to the cooling water injection nozzle 41, it is not necessary to supply the cooling water from an external supply source during the test. For this reason, even if it is a case where the supply source of compressed air and the supply source of cooling water are separated, an injection test can be performed.

  Further, since the supply pressure of the cooling water is increased by using the air pressure of the compressed air, a pump for sending the cooling water to the cooling water injection nozzle 41 is unnecessary. Therefore, a test for searching for suitable injection conditions can be easily performed.

  Moreover, the injection test of cooling water and the injection test of compressed air can be performed by one injection test apparatus.

  In the present embodiment, the second valve 20, the third valve 21, and the sixth valve 35 are configured by manual valves that manually open and close the pipeline, but instead, each valve is configured by an electromagnetic control valve. The opening / closing of each valve may be controlled by a controller. In this case, for example, by setting an opening / closing control program for executing intermittent injection in the controller, it is possible to search for intermittent operation suitable for cooling (setting of an opening time and a closing time).

  In the present embodiment, one cooling water injection nozzle 41 and one air injection nozzle 42 are provided, but a plurality of cooling water injection nozzles 41 and / or air injection nozzles 42 may be provided side by side. When a plurality of cooling water injection nozzles 41 are arranged side by side, the first compressed air supply pipe 24 and the cooling water supply pipe 38 may be branched in the middle and connected to the respective cooling water injection nozzles 41. When a plurality of the nozzles are arranged in parallel, the second compressed air supply pipe 25 may be branched in the middle and connected to each air injection nozzle 42.

  In the present embodiment, the test for searching for the injection condition of the cooling water to be injected to the mold has been described. However, the test for searching for the injection condition of other liquids such as the water-soluble release agent and the oil-based release agent is described. You may use the injection test apparatus of invention.

  As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  The present invention is useful as an ejection test apparatus that ejects liquid from an ejection nozzle.

1: Piping section 2: Injection test section 3: Tank 4: Piping section fixing plate 5: Level gauge 6: Air supply pipe 7: Water supply pipe 8: Tank first connection pipe 9: Tank second connection pipe 10: Air piping system 11 : First air circulation pipe 12: second air circulation pipe 13: branch valve (pressure changing means)
14: Regulator (pressure changing means)
15: First pressure gauge (air pressure detection means)
16: Second pressure gauge (hydraulic pressure detecting means)
17: Exhaust pipe 18: Branch pipe for air injection 19: First valve (open / close valve)
20: Second valve (open / close valve)
21: Third valve (open / close valve)
22: Fourth valve (open / close valve)
23: Supply air upstream connection port 24: First compressed air supply pipe 25: Second compressed air supply pipe 26: First air pipe 27: Second air pipe 30: Liquid piping system 31: Cooling water distribution pipe 32: Flow meter (flow rate detection means)
33: Drain pipe 34: Fifth valve (open / close valve)
35: Sixth valve (open / close valve)
36: 7th valve (open / close valve)
37: Upstream connection port for water supply 38: Cooling water supply pipe 39: Liquid conduit 40: Floor surface 41: Cooling water injection nozzle (injection nozzle)
42: Air injection nozzle 43: Injection target member 43a: Injection target surface 44: Thermocouple (temperature detection means)
45: Compressed air supply port for cooling water injection nozzle 46: Cooling water supply port for cooling water injection nozzle 47: Compressed air supply port for air injection nozzle 48: Nozzle support unit 49: Nozzle support base 50: Vertical shaft 51: Horizontal Shaft 52: Nozzle support 53: Injection target member support base 54: Injection target member support frame

Claims (2)

A tank for storing liquid;
A first air line to which compressed air is supplied;
A second air line that branches off from the first air line and communicates with an upper part of the tank, and that increases the internal pressure of the tank by supplying compressed air;
A liquid conduit that communicates with the lower part of the tank and through which the liquid stored in the tank flows;
An injection nozzle that communicates with the downstream end of the first air conduit and the downstream end of the liquid conduit and injects the liquid flowing through the liquid conduit together with the compressed air supplied from the first air conduit;
Pressure changing means capable of individually changing the supply pressure of compressed air and the supply pressure of liquid to the jet nozzle;
Air pressure detecting means for detecting a supply pressure of compressed air to the injection nozzle;
A liquid pressure detecting means for detecting a supply pressure of the liquid to the spray nozzle. The injection test apparatus according to claim 1,
A jetting target member to which the liquid jetted from the jet nozzle is sprayed;
And a temperature detecting means for detecting a temperature of the injection target member.

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