JP7333238B2 - injector - Google Patents

Description

The present invention relates to injectors.

In areas with snowfall, air jets are used to remove foreign matter such as snow that exists between the base rail of the track branching section installed on the track and the tongue rail that is located next to the base rail and can be contacted and separated from the base rail. A jetting device is installed to remove.

The injection device described in Patent Document 1 is provided with a nozzle having an opening in the tip direction of the tongue rail, and blows off the snow between the base rail and the tongue rail by injecting air compressed by a compressor from the nozzle. to remove.

JP-A-6-240605

By the way, since the injection device as described above generates a large injection noise when injecting air, it is desired to reduce the injection noise. Injection devices for injecting fluid such as water as well as air have the same problem.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to provide an injection device capable of reducing injection noise.

An injection device for solving the above problem includes a supply section that supplies fluid to an injection section that injects fluid to a trajectory branching section, and a pressure control section that controls the pressure of the fluid supplied to the injection section.
According to the above configuration, the pressure of the fluid supplied to the injection section can be lowered by the pressure control section. Therefore, the injection noise generated at relatively high pressure can be reduced to the injection noise generated at relatively low pressure within the controllable pressure range.

In the injection device, it is preferable that the pressure control section includes a valve that reduces the pressure of the fluid supplied to the injection section, and a control section that drives the valve.
According to the above configuration, the pressure of the fluid supplied to the injection section can be lowered by driving the valve by the control section.

In the injection device, it is preferable that the pressure control section lowers the pressure during the nighttime than the pressure during the daytime.
At night, there is a possibility that the noise of the jet of the fluid is relatively noticeable because the environmental noise is less than that during the day. Therefore, according to the above configuration, by making the pressure of the fluid to be ejected at night lower than that in the daytime, it is possible to suppress the conspicuousness of the ejection sound of the fluid.

With regard to the injection device, the pressure control unit injects the fluid each time the train passes through the track branching portion, which is higher than the pressure at the time of post-injection for injecting the fluid when the track branching portion does not change. It is preferable to lower the pressure during the preventive injection.
According to the above configuration, the pressure of the fluid to be injected during the preventive injection is made lower than that during the post-injection, so that the number of occurrences of loud injection sounds can be reduced.

In the injection device, the supply section includes a high pressure circuit that supplies fluid at a first pressure and a low pressure circuit that supplies fluid at a second pressure lower than the first pressure, and the pressure control section includes the Preferably, the pressure is changed by adjusting the flow rate of the fluid supplied by the high pressure circuit and the flow rate of the fluid supplied by the low pressure circuit. According to the above configuration, the high-pressure circuit and the low-pressure circuit are provided, and the pressure of the fluid can be changed by adjusting the flow rates of the different pressures in these circuits.

In the injection device, it is preferable that the pressure control section includes a pressure regulating valve that regulates the pressure supplied to the injection section.
According to the above configuration, since the pressure of the fluid in the supply section can be changed by operating the pressure regulating valve, the pressure of the fluid can be changed without providing a circuit for supplying fluids of different pressures.

With respect to the injection device, it is preferable that the pressure control section cooperates with the pressure control section by changing the pressure supplied to the injection section to a low pressure when the heating device that heats the track branching section is in operation.
According to the above configuration, by operating the injection device and the heating device in combination, the injection device and the heating device can be effectively operated by reducing the waste generated by operating the injection device and the heating device separately. can be made

According to the present invention, injection noise can be reduced.

1 is a block diagram showing a schematic configuration of a first embodiment of a snow removing device; FIG. The figure which shows schematic structure of the track|orbit branch part in which the snow removal apparatus of the same embodiment is installed. The figure which shows the pressure in each injection of the injection apparatus of the same embodiment. FIG. 2 is a block diagram showing a schematic configuration of a second embodiment of a snow removing device; The block diagram which shows schematic structure of 3rd Embodiment of the snow removal apparatus. FIG. 11 is a block diagram showing a schematic configuration of a fourth embodiment of a snow removing device;

(First embodiment)
A first embodiment of a snow removing device having an injection device will be described below with reference to FIGS. 1 to 5. FIG.

As shown in FIG. 1, a snow removal system 1, which is a snow removal device, is installed at a track junction in areas with snowfall. A snow removal system 1 includes an injection device 2 that removes snow present at a track branch by injecting a fluid, and a heating device 3 that heats the rail at the track branch. Here, the snow includes not only the snow itself but also ice solidified by melting the snow.

As shown in FIG. 2, the track branching portion 10 is a portion that branches the track and converts the track. The track branching section 10 includes a pair of basic rails 12 fixed to the sleepers 11, a pair of tongue rails 13 that move relative to the basic rails 12, and a rolling iron 14 that moves the tongue rails 13. there is The track branching portion 10 changes the track when the tongue rail 13 is moved by the rolling iron 14 . The rolling iron 14 is of an electric type that moves the tongue rail 13 by a motor. In the track branching part 10, when the train passes through the track branching part 10, the snow under the floor of the train falls due to the vibration caused by the transfer between the basic rail 12 and the tongue rail 13. - 特許庁The snow that adhered to the underfloor of this train includes hard snow. In addition, at the track branching portion 10, when a foreign object such as snow exists between the basic rail 12 and the tongue rail 13, the track cannot be changed.

The injection device 2 is of a compressed air type, and is a device that blows off snow existing between the base rail 12 and the tongue rail 13 of the track branching portion 10 by injecting compressed air as fluid. The injection device 2 includes a pipe 21 installed on the side surface of the base rail 12 and air nozzles 22 installed at the tip of the pipe 21 . The opening of the air nozzle 22 is located between the basic rail 12 and the tongue rail 13 with the basic rail 12 and the tongue rail 13 in close contact with each other. The opening of the air nozzle 22 is directed toward the tip of the tongue rail 13 and blows off the snow toward the tip of the tongue rail 13. - 特許庁A plurality of sets of pipes 21 and air nozzles 22 are installed on the basic rail 12 . Note that the air nozzle 22 corresponds to the injection section.

The heating device 3 includes an electric heater 31 . The heater 31 is installed on the side surface of the basic rail 12 and melts snow and ice by heating the basic rail 12 . Note that the tongue rail 13 may be heated in addition to the base rail 12 . Also, a heater panel or the like may be installed between the sleepers 11 to heat the basic rail 12 and the tongue rail 13 . The heater 31 is not limited to an electric heating type, and may be a gas type.

As shown in FIG. 1, the injection device 2 has a first pipe 21A installed on the side surface of the normalization side basic rail 12A of the pair of basic rails 12, and a second pipe 21B installed on the side surface of the antiposition side basic rail 12B. It is A first air nozzle 22A is installed at the tip of the first pipe 21A. A first electromagnetic valve 24A for opening and closing the first pipe 21A is installed on the first pipe 21A. A second air nozzle 22B is installed at the tip of the second pipe 21B. A second solenoid valve 24B for opening and closing the second pipe 21B is installed on the second pipe 21B. An air tank 25 in which compressed air is stored is connected to the first solenoid valve 24A and the second solenoid valve 24B. The air tank 25, the first solenoid valve 24A and the second solenoid valve 24B are directly connected by a first supply pipe 28. As shown in FIG.

The injection device 2 includes a low pressure circuit 50 that supplies compressed air at a second pressure lower than the first pressure that is supplied to the first solenoid valve 24A and the second solenoid valve 24B via the first supply pipe 28. . Hereinafter, the first pressure is assumed to be high pressure, and the second pressure is assumed to be low pressure. A circuit including the first supply pipe 28, the first solenoid valve 24A, and the second solenoid valve 24B is referred to as a high-pressure circuit 29.

The low-pressure circuit 50 includes a second supply pipe 52 branched from the first supply pipe 28 and connected to the first pipe 21A and the second pipe 21B via a pressure reducing valve 51 . The second supply pipe 52 is branched and connected to the first pipe 21A via a third solenoid valve 53 and connected to the second pipe 21B via a fourth solenoid valve 54 . The third solenoid valve 53 and the fourth solenoid valve 54 open and close the respective pipes. The pressure reducing valve 51 reduces the first pressure of the air tank 25 to a preset second pressure and supplies the second pressure to the second supply pipe 52 . Note that the second pressure of the pressure reducing valve 51 may be changeable. In the injection device 2, the high pressure circuit 29 and the low pressure circuit 50 are connected in parallel between the air tank 25 and the first pipe 21A and the second pipe 21B. Therefore, the high voltage circuit 29 and the low voltage circuit 50 function as supply units.

A pressure sensor 27 for detecting the pressure of the air tank 25 is installed in the air tank 25 . The compressor 26 operates to supply compressed air to the air tank 25 when the pressure of the air tank 25 becomes equal to or less than the threshold value. That is, the compressed air supplied from the compressor 26 is stored in the air tank 25, and the first solenoid valve 24A, the second solenoid valve 24B, the third solenoid valve 53, and the fourth solenoid valve 54 connected to the air tank 25 Air is jetted from the first air nozzle 22A and the second air nozzle 22B by switching on and off. The injection device 2 can change the injection pressure, the number of injections, and the injection time. When only the first electromagnetic valve 24A is opened, high-pressure compressed air of a first pressure is jetted from the first air nozzle 22A. When only the second solenoid valve 24B is opened, high-pressure first-pressure compressed air is jetted from the second air nozzle 22B. When only the third solenoid valve 53 is opened, the low-pressure second pressure compressed air is injected from the first air nozzle 22A. When only the fourth solenoid valve 54 is opened, the compressed air of the second low pressure is injected from the second air nozzle 22B. Therefore, the first solenoid valve 24A, the second solenoid valve 24B, the third solenoid valve 53, and the fourth solenoid valve 54 function as a pressure control section.

The injection device 2 includes an injection control device 20 that controls injection of compressed air. The injection control device 20 has a programmable logic controller (PLC), which is a sequence control device, and operates according to a dedicated program called a ladder program. The PLC includes a CPU (Central Processing Unit) and a memory. Input devices such as a pressure sensor 27 , a point position sensor 41 , a train detection sensor 42 and a snowfall detection sensor 43 are connected to the injection control device 20 . Output devices such as the first solenoid valve 24A, the second solenoid valve 24B, the third solenoid valve 53, the fourth solenoid valve 54, the compressor 26, the pressure sensor 27, etc. are connected to the injection control device 20. FIG. The injection control device 20 controls these controlled devices by a ladder program. The injection control device 20 performs on/off control on the first electromagnetic valve 24A, the second electromagnetic valve 24B, the third electromagnetic valve 53, and the fourth electromagnetic valve 54, thereby controlling the injection pressure, the number of injections, and the injection time of the compressed air. to control. Note that the injection control device 20 functions as a pressure control section and a control section.

In the heating device 3, a first heater 31A is installed along the extension direction on the side surface of the normalization side basic rail 12A of the pair of basic rails 12, and a second heater 31A is installed along the extension direction on the side surface of the antiposition side basic rail 12B. 2 heaters 31B are installed. In the heating device 3, a first temperature sensor 32A for detecting the temperature of the normalization-side basic rail 12A is installed on the normalization-side basic rail 12A, and a second temperature sensor 32B for detecting the temperature of the anti-position-side basic rail 12B is installed on the anti-position-side basic rail 12B. It is installed on the basic rail 12B. The first temperature sensor 32A and the second temperature sensor 32B output temperature signals containing detected temperature information. Although the first temperature sensor 32A and the second temperature sensor 32B are configured as the heating device 3, they may be configured as the jetting device 2, or as long as they are configured as the snow removing system 1. FIG.

The heating device 3 includes a heating control device 30 that controls heating. The heating control device 30 has a programmable logic controller (PLC), which is a sequence control device, and operates according to a dedicated program called a ladder program. The PLC includes a CPU (Central Processing Unit) and a memory. Input devices such as a first temperature sensor 32A and a second temperature sensor 32B are connected to the heating control device 30 . Output devices such as the first heater 31A and the second heater 31B are connected to the heating control device 30 . The heating control device 30 controls these controlled devices by a ladder program. The heating control device 30 controls heating by performing on/off control of the first heater 31A and the second heater 31B.

The point position sensor 41 detects the position of the tongue rail 13 between the normal position and the reverse position of the base rail 12 based on the current value of the motor of the rolling iron 14, and outputs a position signal including position information. . The injection control device 20 determines whether or not the change has occurred based on the position signal input from the point position sensor 41 . For example, when the tongue rail 13 cannot move due to snow or ice between the base rail 12 and the tongue rail 13, the point position sensor 41 outputs a position signal including position information indicating that the tongue rail 13 cannot move. When a change occurs, the track branching unit 10 retry the change, or transmits a change signal including information about the change to the operation command center or the like.

The train detection sensor 42 includes, for example, an ultrasonic sensor, and outputs a train passage detection signal when a train passes.
The snowfall detection sensor 43 is installed on the track branching section 10 and around the track branching section 10, detects the amount of snowfall according to the moisture content of the snow adhering to the detection section, and outputs a snowfall signal including the amount of snowfall. . Further, the snowfall detection sensor 43 is not limited to the moisture detection method, and may be an infrared method that detects the amount of snowfall by detecting infrared rays reflected by snow. The injection control device 20 acquires snowfall amount information from the snowfall signal input from the snowfall detection sensor 43 . The injection control device 20 may acquire the track branching portion 10 and the amount of accumulated snow around the track branching portion 10 in addition to the track branching portion 10 and the amount of snowfall around the track branching portion 10 . The amount of snowfall is the amount of snow falling in a predetermined time, and the amount of snow currently falling can be grasped. The amount of accumulated snow is the amount of accumulated snow, and the amount of currently accumulated snow can be grasped.

As shown in FIG. 3 , the injection control device 20 performs “post-injection”, “preventive injection” and “intermittent injection” by the injection device 2 . "Post-injection" is the injection of compressed air for the purpose of removing existing snow or ice when the orbit branch 10 has become unconverted. In addition, when the track branching portion 10 performs the retry operation when the trajectory branching portion 10 does not change, it performs "retry injection" in which compressed air is injected each time the retry operation is performed. "Preventive injection" is to inject compressed air every time a train passes for the purpose of preventing the train from not changing because there is a risk that snow will fall when the train passes the track junction 10. - 特許庁"Intermittent injection" is to inject compressed air at regular intervals for the purpose of avoiding snow accumulation during snowfall. In addition, there is a “manual injection” in which an operator manually causes the injection device 2 to inject compressed air at the track branching portion 10 . The injection control device 20 cooperates with the heating device 3 according to the rail temperature and snowfall information to operate so that the track branching portion 10 is free of snow or the like.

The injection control device 20 causes high-pressure compressed air to be injected from the first air nozzle 22A and the second air nozzle 22B during "post-injection, retry injection" and "manual injection". That is, the injection control device 20 closes the third solenoid valve 53 and the fourth solenoid valve 54 and opens the first solenoid valve 24A and the second solenoid valve 24B, thereby supplying high-pressure compressed air to the first air nozzle 22A and the first solenoid valve 22A. 2 to jet from the air nozzle 22B. In the case of "preventive injection" and "intermittent injection", low-pressure compressed air is injected from the first air nozzle 22A and the second air nozzle 22B. That is, the injection control device 20 closes the first electromagnetic valve 24A and the second electromagnetic valve 24B and opens the third electromagnetic valve 53 and the fourth electromagnetic valve 54, thereby supplying low-pressure compressed air to the first air nozzle 22A and the first air nozzle 22A. 2 air nozzle 22B.

As shown in FIG. 2, the injection control device 20 causes one of the first air nozzle 22A and the second air nozzle 22B to inject instead of simultaneously injecting from both the first air nozzle 22A and the second air nozzle 22B. The injection control device 20 supplies compressed air to the piping 21 on the side where the tongue rail 13 is away from the base rail 12, so as to supply compressed air to the first solenoid valve 24A and the third solenoid valve 53 or the second solenoid valve 24B and the fourth solenoid valve 24B. The solenoid valve 54 is controlled to be opened. By adopting one-sided injection in this manner, the required air pressure or air volume can be suppressed. If simultaneous injection from both the first air nozzle 22A and the second air nozzle 22B is required, the air pressure in the air tank 25 may be the required pressure, or the air volume may be the required amount. The injection control device 20 acquires the pressure value of the air tank 25 from the pressure sensor 27 and operates the compressor 26 to supply compressed air to the air tank 25 when the pressure value becomes equal to or less than the threshold value.

As shown in FIG. 1, the configuration of the injection device 2 includes a first electromagnetic valve 24A, a second electromagnetic valve 24B, an air tank 25, a compressor 26, a pressure sensor 27, and an injection control device 20. Unit 23 is assumed. The air source unit 23 is a unit that can function as the injection device 2 by connecting equipment installed at the track branching portion 10 . Devices installed at the track branching portion 10 include a first pipe 21A, a first air nozzle 22A, a second pipe 21B, a second air nozzle 22B, a point position sensor 41, a train detection sensor 42, a snowfall detection sensor 43, and the like. By connecting the heating control device 30 to which the first heater 31A, the second heater 31B, the first temperature sensor 32A, and the second temperature sensor 32B, which are the components of the heating device 3, are connected to the air source unit 23, the injection device In addition to the function of 2, it can have the function of the heating device 3 . The injection control device 20 of the air source unit 23 can then control the injection device 2 and the heating device 3 . The air source unit 23 adds a low-pressure circuit 50 to connect the first supply pipe 28 to the first pipe 21A and the second pipe 21B, thereby supplying the compressed air of the second pressure to the first air nozzle 22A and the second air nozzle 22A. It becomes possible to inject from the air nozzle 22B.

The injection device 2 operates in cooperation with the heating device 3 according to the rail temperature and snowfall information so that the track branching portion 10 is free of snow or the like. The injection control device 20 and the heating control device 30 are communicatively interconnected by a connection line 100 . The injection control device 20 acquires the temperature of the rail from the heating control device 30 via the connection line 100 . On the other hand, the heating control device 30 acquires snowfall information and non-conversion information from the injection control device 20 via the connection line 100 . Note that the connection line 100 corresponds to the communication section, and instead of the connection line 100, the injection control device 20 and the heating control device 30 may each include a communication section that enables wireless communication.

Next, operation of the snow removal system 1 configured as described above will be described.
An injection control device 20 controls the heating device 3 . That is, the injection control device 20 instructs the heating control device 30 of the heating device 3 to control the heating device 3 via the heating control device 30 .

The injection control device 20 controls the injection device 2 and the heating device 3 based on the rail temperature of the track branching section 10 and snowfall information. That is, if the temperature of the base rail 12 is relatively high, the snow will melt quickly even if it snows, whereas if the temperature of the base rail 12 is relatively low, the snow will not melt and will accumulate. there is a possibility. Therefore, if the injection control device 20 controls the injection device 2 and the heating device 3 based on the temperature of the base rail 12, the snow removal system 1 can be effectively operated while suppressing the non-switching of the track branching portion 10. can be done.

The injection control device 20 controls the operation of the injection device 2 based on the amount of snowfall at the track branching portion 10 . The injection control device 20 determines whether or not the trajectory branching portion 10 is in an obstruction state in which the operation is obstructed by snow. The injection control device 20 causes the injection device 2 to perform the post-injection when it is determined that the trajectory branching portion 10 is in the blocked state. The injection control device 20 causes the injection device 2 to perform preventive injection each time the train passes through the track branching portion 10 . Further, the injection control device 20 causes the injection device 2 to perform intermittent injection for the purpose of avoiding snow accumulation during snowfall.

As described above, the injection device 2 is provided with the low-pressure circuit 50 so that it can inject high-pressure compressed air and low-pressure compressed air. Injection noise can be reduced by injecting. Further, when it is necessary to blow off foreign matter such as snow present at the track branching part 10, the injection noise can be reduced without lowering the removal performance by injecting high-pressure compressed air as in the conventional case.

Next, the effects of this embodiment will be described.
(1) The pressure of the compressed air supplied to the air nozzle 22 can be the compressed air of the first pressure in the high pressure circuit 29 and the compressed air of the second pressure in the low pressure circuit 50 . Therefore, the injection noise generated at relatively high pressure can be reduced to the injection noise generated at relatively low pressure within the variable pressure range.

(2) A high pressure circuit 29 and a low pressure circuit 50 are provided, and by combining different pressures in these circuits, the pressure of the compressed air can be changed.
(3) By making the pressure of the compressed air lower during the preventive injection than during the post-injection, it is possible to reduce the number of occurrences of loud injection sounds.

(4) By operating the injection device 2 and the heating device 3 in combination, waste generated by operating the injection device 2 and the heating device 3 separately is reduced, and the injection device 2 and the heating device 3 are effective. can be operated effectively.

(Second embodiment)
A second embodiment of a snow removing device having an injection device will be described below with reference to FIG. The injection device of this embodiment differs from that of the first embodiment in the supply section and the pressure control section. The following description focuses on differences from the first embodiment.

As shown in FIG. 4, the injection device 2 has a high-pressure circuit 60 and a low-pressure circuit 70 provided in parallel on a first supply pipe 28 that supplies compressed air to the first solenoid valve 24A and the second solenoid valve 24B. there is A high pressure circuit 60 supplies compressed air at a first pressure in the air tank 25 . On the other hand, the low pressure circuit 70 supplies compressed air of a second pressure lower than the first pressure of the high pressure circuit 60 . Therefore, the high voltage circuit 60 and the low voltage circuit 70 function as supply units.

The high-pressure circuit 60 includes a high-pressure pipe 61 that supplies compressed air at the first pressure of the air tank 25 . The high-pressure pipe 61 is provided with a fifth solenoid valve 62 for opening and closing the high-pressure pipe 61 . When the fifth solenoid valve 62 opens, the compressed air of the first high pressure is supplied to the first solenoid valve 24A and the second solenoid valve 24B through the first supply pipe 28. As shown in FIG.

The low-pressure circuit 70 includes a low-pressure pipe 71 for reducing the first pressure in the air tank 25 and supplying compressed air at the second pressure. The low pressure pipe 71 is provided with a pressure reducing valve 72 that reduces the first pressure of the compressed air supplied from the air tank 25 to a preset second pressure, and a sixth solenoid valve 73 that opens and closes the low pressure pipe 71. there is When the sixth solenoid valve 73 is opened, the compressed air of the second pressure, which is low pressure, is supplied to the first solenoid valve 24A and the second solenoid valve 24B through the first supply pipe 28 . Note that the second pressure of the pressure reducing valve 72 may be changeable.

The injection device 2 injects compressed air from the first air nozzle 22A and the second air nozzle 22B by turning on/off the first electromagnetic valve 24A and the second electromagnetic valve 24B connected to the first supply pipe 28 . The injection device 2 can switch between high pressure and low pressure by turning on/off the fifth solenoid valve 62 and the sixth solenoid valve 73 . When only the fifth solenoid valve 62 is opened, high pressure compressed air of the first pressure is supplied to the first supply pipe 28 . When only the sixth solenoid valve 73 is opened, the low-pressure second pressure compressed air is supplied to the first supply pipe 28 . Therefore, the fifth solenoid valve 62 and the sixth solenoid valve 73 function as a pressure control section.

Output devices such as the fifth solenoid valve 62 and the sixth solenoid valve 73 are connected to the injection control device 20 . The injection control device 20 performs on/off control on the first solenoid valve 24A, the second solenoid valve 24B, the fifth solenoid valve 62, and the sixth solenoid valve 73, thereby controlling the injection pressure, the number of injections, and the injection time of the compressed air. to control.

The injection control device 20 causes high-pressure compressed air to be injected from the first air nozzle 22A and the second air nozzle 22B during "post-injection, retry injection" and "manual injection". That is, the injection control device 20 opens the fifth solenoid valve 62, closes the sixth solenoid valve 73, and opens the first solenoid valve 24A and the second solenoid valve 24B, thereby supplying high-pressure compressed air to the first air nozzle 22A. and jet from the second air nozzle 22B. In the case of "preventive injection" and "intermittent injection", low-pressure compressed air is injected from the first air nozzle 22A and the second air nozzle 22B. That is, the injection control device 20 opens the sixth solenoid valve 73, closes the fifth solenoid valve 62, and opens the first solenoid valve 24A and the second solenoid valve 24B, thereby supplying low-pressure compressed air to the first air nozzle 22A. and the second air nozzle 22B.

As described above, the injection device 2 includes the high-pressure circuit 60 and the low-pressure circuit 70, so that it is possible to inject high-pressure compressed air and low-pressure compressed air. Injection noise can be reduced by injecting compressed air. Also, when it is necessary to blow off foreign matter such as snow present at the track branching part 10, the injection noise can be reduced without lowering the removal performance by injecting high-pressure compressed air as in the conventional case.

Next, the effects of this embodiment will be described. In addition to the effects (2) to (4) of the first embodiment, the following effects are obtained.
(1) By providing a high-pressure circuit 60 and a low-pressure circuit 70 in the first supply pipe 28 that supplies compressed air to the air nozzle 22, the compressed air at the first pressure in the high-pressure circuit 60 and the second pressure in the low-pressure circuit 70 are compressed. can be supplied with air. Therefore, the injection noise generated at relatively high pressure can be reduced to the injection noise generated at relatively low pressure within the variable pressure range.

(5) The pressure of the compressed air can be changed without changing the control of the compressed air injected from the first air nozzle 22A and the second air nozzle 22B by the first solenoid valve 24A and the second solenoid valve 24B.

(Third embodiment)
A third embodiment of a snow removing device having an injection device will be described below with reference to FIG. The injection device of this embodiment differs from that of the first embodiment in the supply section and the pressure control section. The following description focuses on differences from the first embodiment.

As shown in FIG. 5, the injection device 2 includes a pressure regulating valve 80 on the first supply pipe 28 that supplies compressed air to the first solenoid valve 24A and the second solenoid valve 24B. The pressure regulating valve 80 adjusts the compressed air of the first pressure in the air tank 25 and supplies it to the first solenoid valve 24A and the second solenoid valve 24B. The pressure regulating valve 80 is controlled by the injection control device 20 to set a high first pressure and a low second pressure. Therefore, the pressure regulating valve 80 functions as a pressure control section.

The injection control device 20 causes high-pressure compressed air to be injected from the first air nozzle 22A and the second air nozzle 22B during "post-injection, retry injection" and "manual injection". That is, the injection control device 20 causes the pressure regulating valve 80 to supply compressed air of the first pressure to the first supply pipe 28, and opens the first electromagnetic valve 24A and the second electromagnetic valve 24B, thereby supplying high-pressure compressed air. It is jetted from the first air nozzle 22A and the second air nozzle 22B. In the case of "preventive injection" and "intermittent injection", low-pressure compressed air is injected from the first air nozzle 22A and the second air nozzle 22B. That is, the injection control device 20 causes the pressure regulating valve 80 to supply the compressed air of the second pressure to the first supply pipe 28, and opens the first electromagnetic valve 24A and the second electromagnetic valve 24B, thereby supplying the low-pressure compressed air. It is jetted from the first air nozzle 22A and the second air nozzle 22B.

As described above, the injection device 2 is capable of injecting high-pressure compressed air and low-pressure compressed air by including the pressure regulating valve 80 in the first supply pipe 28. During preventive injection and intermittent injection, Injection noise can be reduced by injecting low-pressure compressed air into the Further, when it is necessary to blow off foreign matter such as snow present at the track branching part 10, the injection noise can be reduced without lowering the removal performance by injecting high-pressure compressed air as in the conventional case.

Next, the effects of this embodiment will be described. In addition to the effects (2) to (4) of the first embodiment and (5) of the second embodiment, the following effects are obtained.
(1) Compressed air at a first pressure and compressed air at a second pressure can be supplied by adding a pressure regulating valve 80 to the first supply pipe 28 that supplies compressed air to the air nozzle 22 . Therefore, the pressure of the fluid can be changed without providing a circuit for supplying compressed air of different pressures. Therefore, the injection noise generated at relatively high pressure can be reduced to the injection noise generated at relatively low pressure within the variable pressure range.

(Fourth embodiment)
A fourth embodiment of a snow removing device having an injection device will be described below with reference to FIG. The injection device of this embodiment differs from that of the second embodiment in the supply section. The following description focuses on differences from the second embodiment.

As shown in FIG. 6, the injection device 2 has a high-pressure circuit 160 and a low-pressure circuit 170 provided in parallel on the first supply pipe 28 for supplying compressed air to the first solenoid valve 24A and the second solenoid valve 24B. there is High pressure circuit 160 supplies compressed air at a first pressure supplied from compressor 26 . On the other hand, low pressure circuit 170 supplies compressed air at a second pressure lower than the first pressure of high pressure circuit 160 . Therefore, the high voltage circuit 160 and the low voltage circuit 170 function as supply units.

A high-pressure pipe 61 of the high-pressure circuit 160 is provided with a first tank 63 for storing compressed air of a first pressure supplied from the compressor 26 and a fifth solenoid valve 62 for opening and closing the high-pressure pipe 61 . When the fifth solenoid valve 62 opens, the compressed air of the first high pressure is supplied from the first tank 63 through the first supply pipe 28 to the first solenoid valve 24A and the second solenoid valve 24B.

The low-pressure pipe 71 of the low-pressure circuit 170 includes a pressure reducing valve 72 for reducing the first pressure supplied from the compressor 26 to a preset second pressure, and a second tank 74 for storing the compressed air reduced to the second pressure. , and a sixth electromagnetic valve 73 for opening and closing the low-pressure pipe 71 . When the sixth solenoid valve 73 opens, the compressed air of the second low pressure is supplied from the second tank 74 through the first supply pipe 28 to the first solenoid valve 24A and the second solenoid valve 24B. Note that the second pressure of the pressure reducing valve 72 may be changeable.

The injection device 2 injects compressed air from the first air nozzle 22A and the second air nozzle 22B by turning on/off the first electromagnetic valve 24A and the second electromagnetic valve 24B connected to the first supply pipe 28 . The injection device 2 can switch between high pressure and low pressure by turning on/off the fifth solenoid valve 62 and the sixth solenoid valve 73 . When only the fifth solenoid valve 62 is opened, high pressure compressed air of the first pressure is supplied from the first tank 63 to the first supply pipe 28 . When only the sixth solenoid valve 73 is opened, the low-pressure second pressure compressed air is supplied from the second tank 74 to the first supply pipe 28 . Therefore, the fifth solenoid valve 62 and the sixth solenoid valve 73 function as a pressure control section.

The injection control device 20 includes a fifth solenoid valve 62, a sixth solenoid valve 73, a pressure sensor (not shown) for detecting the pressure of the first tank 63, and a pressure sensor (not shown) for detecting the pressure of the second tank 74. or other output device is connected. The injection control device 20 performs on/off control on the first solenoid valve 24A, the second solenoid valve 24B, the fifth solenoid valve 62, and the sixth solenoid valve 73, thereby controlling the injection pressure, the number of injections, and the injection time of the compressed air. to control.

The injection control device 20 causes high-pressure compressed air to be injected from the first air nozzle 22A and the second air nozzle 22B during "post-injection, retry injection" and "manual injection". That is, the injection control device 20 opens the fifth solenoid valve 62, closes the sixth solenoid valve 73, and opens the first solenoid valve 24A and the second solenoid valve 24B, thereby increasing the high pressure supplied from the first tank 63. of compressed air are jetted from the first air nozzle 22A and the second air nozzle 22B. In the case of "preventive injection" and "intermittent injection", low-pressure compressed air is injected from the first air nozzle 22A and the second air nozzle 22B. That is, the injection control device 20 opens the sixth solenoid valve 73, closes the fifth solenoid valve 62, and opens the first solenoid valve 24A and the second solenoid valve 24B, thereby increasing the low pressure supplied from the second tank 74. of compressed air are jetted from the first air nozzle 22A and the second air nozzle 22B.

As described above, the injection device 2 is provided with the high-pressure circuit 160 and the low-pressure circuit 170 including tanks, so that it is possible to inject high-pressure compressed air and low-pressure compressed air, and perform preventive injection and intermittent injection. Injection noise can sometimes be reduced by injecting low-pressure compressed air. Also, when it is necessary to blow off foreign matter such as snow present at the track branching part 10, the injection noise can be reduced without lowering the removal performance by injecting high-pressure compressed air as in the conventional case.

Next, the effects of this embodiment will be described. In addition to the effects (2) to (4) of the first embodiment and (5) of the second embodiment, the following effects are obtained.
(1) Compressed air at a first pressure and compressed air at a second pressure can be supplied by providing a high-pressure circuit 160 and a low-pressure circuit 170 in the first supply pipe 28 that supplies compressed air to the air nozzle 22. . Therefore, the injection noise generated at relatively high pressure can be reduced to the injection noise generated at relatively low pressure within the variable pressure range.

(Other embodiments)
Each of the above embodiments can be implemented with the following modifications. Each of the above-described embodiments and the following modifications can be implemented in combination with each other within a technically consistent range.

- In the first, second and fourth embodiments, the pressure supplied to the air nozzle 22 is changed by switching between the fluid supplied by the high pressure circuits 29, 60 and 160 and the fluid supplied by the low pressure circuits 50, 70 and 170. However, the pressure supplied to the air nozzle 22 may be changed by adjusting the flow rate of the fluid supplied by the high pressure circuits 29, 60, 160 and the flow rate of the fluid supplied by the low pressure circuits 50, 70, 170.

- In each of the above-described embodiments, the injection control device 20 may make the pressure during the night lower than the pressure during the day. That is, at night, the injection control device 20 sets the pressure to be relatively lower than that in the daytime, and causes the first air nozzle 22A and the second air nozzle 22B to inject the compressed air. For example, during the daytime, high-pressure compressed air is injected in all of "post injection", "preventive injection", "intermittent injection", and "manual injection", and at night, "post injection", "preventive injection", and "intermittent injection" are injected. Low-pressure compressed air may be injected in all of "injection" and "manual injection".

In each of the above-described embodiments, when the heating device 3 that heats the track branching portion 10 is operating, the pressure supplied to the air nozzle 22 of the injection device 2 is changed to a low pressure so that the injection device 2 and the heating device 3 cooperate with each other. may work. In this way, the injection device 2 and the heating device 3 can be operated effectively by reducing the waste generated by operating the injection device 2 and the heating device 3 separately.

In each of the above-described embodiments, at least one of the injection control device 20 and the heating control device 30 may operate the injection device 2 and the heating device 3 when snow is present at the track branching portion 10 .

・In each of the above embodiments, the injection device 2 and the heating device 3 are operated based on the information on the rail temperature and the amount of snowfall. may be activated.

- In each of the above embodiments, the control is performed based on the temperature of the base rail 12, but the control may be performed based on the temperature of the tongue rail 13. Also, the control may be performed based on both the temperature of the base rail 12 and the temperature of the tongue rail 13 . For example, the temperature of the base rail 12 and the temperature of the tongue rail 13 may be compared and the control may be performed based on the lower temperature.

In each of the above configurations, as shown in FIGS. 1 and 4, the snow removal system 1 may include an air temperature sensor 44 that detects the air temperature around the track junction 10 and outputs an air temperature signal containing air temperature information. good. The injection control device 20 and the heating control device 30 may be turned on/off based on the outside air temperature instead of the rail temperature.

- In each of the above embodiments, the injection control device 20 and the heating control device 30 are PLCs, but the injection control device 20 and the heating control device 30 are not limited to PLCs, and can be used as devices that control devices other than ladder programs. good.

- In each of the above embodiments, the injection control device 20 controls the heating device 3 , but the injection control device 20 does not have to control the heating device 3 . That is, the heating control device 30 itself controls the heating device 3 based on the temperature of the rail. Also, the configuration of the heating device 3 may be omitted.

In each of the above configurations, the fluid injection pressure, the number of injections, and the injection time of the injection device 2 may be changed during operation based on the temperature of the rail of the track branching portion 10 . The amount and distance of snow that can be blown away can be increased by increasing the injection pressure of the fluid, the amount and distance of snow that can be blown away can be increased by increasing the number of times of injection, and the amount of snow that can be blown away can be increased by increasing the injection time. You can increase the amount and distance of snow that can be covered.

- In each of the above embodiments, in the manual injection, the operator manually causes the injection device 2 to inject compressed air at the track branching portion 10 . However, the injection operation by the operator is not limited to the trajectory branching section 10, and may be performed by a remote monitor board, PC, tablet terminal, or the like.

- In each of the above embodiments, the snow is simply blown away to remove it. In addition, the above-described piping unit having the nozzle may be used as a heating device to heat the space between the base rail 12 and the tongue rail 13 when the track branching portion 10 is not converted.

- In the above configuration, only the air source unit 23 that does not include the air nozzle 22 and the injection control device 20 may be an injection device capable of reducing injection noise.
- The jet device 2 may jet not only air but also water or hot water as a fluid.

DESCRIPTION OF SYMBOLS 1... Snow removal system, 2... Injection apparatus, 3... Heating apparatus, 10... Track branching part, 11... Sleeper, 12A... Shift side basic rail, 12B... Reverse side basic rail, 13... Tongue rail, 14... Rolling iron 20... injection control device 21A... first pipe 21B... second pipe 22A... first air nozzle 22B... second air nozzle 23... air source unit 24A... first solenoid valve 24B... second solenoid Valve 25 Air tank 26 Compressor 27 Pressure sensor 28 First supply pipe 29 High pressure circuit 30 Heating control device 31A First heater 31B Second heater 32A First Temperature sensor 32B Second temperature sensor 41 Point position sensor 42 Train detection sensor 43 Snowfall detection sensor 44 Air temperature sensor 50 Low pressure circuit 51 Pressure reducing valve 52 Second supply circuit 53... Third solenoid valve, 54... Fourth solenoid valve, 60, 160... High pressure circuit, 61... High pressure pipe, 62... Third solenoid valve, 63... First tank, 70, 170... Low pressure circuit, 71... Low pressure pipe , 72... pressure reducing valve, 73... fourth solenoid valve, 74... second tank, 80... pressure regulating valve, 100... connection line.

Claims (9)

a supply unit that supplies the fluid to the injection unit that injects the fluid to the orbital branch;
a pressure control unit that controls the pressure of the fluid supplied to the injection unit ;
The pressure control unit causes the pressure at night to be lower than the pressure during the day . a supply unit that supplies the fluid to the injection unit that injects the fluid to the orbital branch;
a pressure control unit that controls the pressure of the fluid supplied to the injection unit ;
In the case of preventive injection in which the fluid is injected each time the train passes through the track branching portion, the pressure control section is higher than the pressure in the case of post-injection in which the fluid is injected when the track branching portion does not change. to lower the pressure of the injector. a supply unit that supplies the fluid to the injection unit that injects the fluid to the orbital branch;
a pressure control unit that controls the pressure of the fluid supplied to the injection unit ;
The pressure control unit cooperates by changing the pressure supplied to the injection unit to a low pressure when the heating device that heats the track branching unit is operating. The injection device according to claim 2 or 3 , wherein the pressure control unit makes the pressure during nighttime lower than the pressure during daytime. In the case of preventive injection in which the fluid is injected each time the train passes through the track branching portion, the pressure control section is higher than the pressure in the case of post-injection in which the fluid is injected when the track branching portion does not change. 4. An injection device as claimed in claim 1 or 3 , wherein the pressure of is reduced. The injection device according to claim 1 or 2 , wherein the pressure control section cooperates with changing the pressure supplied to the injection section to a low pressure when the heating device that heats the track branching section is in operation. The pressure control unit includes a valve that reduces the pressure of the fluid supplied to the injection unit;
The injection device according to any one of claims 1 to 6, further comprising a control section that drives the valve. The supply unit includes a high-pressure circuit that supplies fluid at a first pressure;
a low-pressure circuit that supplies fluid at a second pressure lower than the first pressure,
The injection according to any one of claims 1 to 7 , wherein the pressure control unit changes the pressure by adjusting the flow rate of the fluid supplied by the high pressure circuit and the flow rate of the fluid supplied by the low pressure circuit. Device. The injection device according to any one of claims 1 to 8 , wherein the pressure control section includes a pressure regulating valve that adjusts the pressure supplied to the injection section.