Limit switch device for controlling operation of underwater transport vehicle

Abstract

The invention discloses a limit switch device for operation control of an underwater transport vehicle, which can stop or turn around a micro bubble water underwater transport vehicle at a correct position and has excellent stability. The limit switch device for controlling the operation of the underwater transport vehicle comprises: a watertight structure having an internal space; a stop signal generator which is installed in the watertight structure and generates an arrival signal of the underwater transport vehicle through a control panel; the rotary control rod unit can be installed in an in-situ rotating mode and can be operated through the underwater transport vehicle; and an operation lever unit having an operation lever, one end of which is connected to the rotation control lever unit and the other end of which is connected to the stop signal generator through one side wall of the watertight structure, so that the rotation control lever unit moves forward when rotated from a first direction by the underwater vehicle, and the operation lever unit moves forward when rotated from a second direction by the underwater vehicle. The stop signal generator is enabled to operate, and an arrival signal of the underwater transport vehicle is generated.

Description

Technical Field

[0001] The present invention relates to a limit switch device for controlling the operation of an underwater transporter (hereinafter, also referred to as "underwater transporter limit switch device"), and more particularly, to an underwater transporter limit switch device that enables an underwater transporter operating in water such as a water tank to stop at a set position or reciprocate a set number of times within a set section. Background Art

[0002] Generally, an underwater transporter operating in water such as a water tank or a sludge sedimentation tank needs to operate within a set section, and thus, a limit switch needs to be installed to stop or turn around at a set position. Usually, the limit switch is installed above water. If the structure is not exposed above water, various methods such as installing a limit switch on a rope winding drum above water are used to stop or turn around the underwater transporter.

[0003] The prior art related thereto is disclosed in the authorized patent gazette of Patent No. 10-0712009 (invention title: Sludge removal system for sedimentation tank, inventors: Hong Young-joo et al., 4 people).

[0004] Moreover, in an ice seawater tank, model ice imitating the physical properties (density, bending strength, elastic modulus, compressive strength, etc.) of sea ice in polar seas needs to be generated for experiments. For this purpose, a fine bubble water underwater transporter (hereinafter, also referred to as "underwater transporter") completely submerged in water is used to supply fine bubble water to the ice seawater tank, and the operation of the above-mentioned underwater transporter requires an underwater transporter limit switch device that can be installed in water. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] An object of the present invention is to provide an underwater transporter limit switch device that enables an underwater transporter operating in water such as a water tank to stop or turn around at a correct position.

[0007] Another object of the present invention is to provide an underwater transporter limit switch device that improves the stability of enabling the underwater transporter to stop or turn around stably at a set position.

[0008] Still another object of the present invention is to provide an underwater transporter limit switch device that prevents rubbing at the contact portion with the underwater transporter.

[0009] (II) Technical Solutions

[0010] The limit switch device for underwater transport vehicle operation control according to the present invention, as the limit switch device for underwater transport vehicle operation control of an underwater transport vehicle system having a control board for controlling an underwater transport vehicle and the operation of the underwater transport vehicle, includes: a watertight structure having an internal space; a stop signal generator installed inside the watertight structure for generating an arrival signal of the underwater transport vehicle through the control board; a rotary control rod unit rotatably installed in place and operable by the underwater transport vehicle; and an operating rod unit having an operating rod, one end of which is connected to the rotary control rod unit and the other end of which passes through a side wall of the watertight structure and is connected to the stop signal generator, so that when the rotary control rod unit is rotated in a first direction by the underwater transport vehicle, it moves forward, operates the stop signal generator, and generates an arrival signal of the underwater transport vehicle.

[0011] Preferably, the rotary control rod unit includes: a pair of control rods rotatably installed at intervals; a connecting shaft connecting the pair of control rods; and a disk installed on the connecting shaft and protruding forward relative to the pair of control rods, and capable of contacting the underwater transport vehicle earlier than the pair of control rods.

[0012] Preferably, long holes are respectively formed in the pair of control rods, and the operating rod unit includes: protruding connecting portions extending from the operating rod to both sides and engaging with the long holes.

[0013] Preferably, a plurality of the disks are installed at intervals and rotatably installed in place.

[0014] Preferably, a spring for retracting the operating rod unit and returning it to its original position is installed on the outer peripheral surface of the operating rod between the watertight structure and the protruding connecting portion.

[0015] Preferably, the stop signal generator includes: a pipe member connected to the operating rod and having a guiding switch installed inside; and a guiding switch operating portion having a magnet formed inside, installed outside the pipe member and allowing the pipe member to move, so as to operate the guiding switch.

[0016] More preferably, a pair of the limit switch devices for underwater transport vehicle operation control are installed at intervals.

[0017] (III) Beneficial effects

[0018] According to the present invention, it is possible to make the underwater transport vehicle of microbubble water stop or turn around at the correct position.

[0019] According to the present invention, a float level switch for verifying stability in water can be used, so the stability is excellent.

[0020] According to the present invention, a pair of the devices of the present invention are installed, thus further improving stability.

[0021] According to the present invention, a rotating disc is applied to the contact part with the underwater transporter, thereby preventing scraping on the underwater transporter. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A plan view of a water tank for applying the limit switch device for controlling the operation of an underwater transporter according to the present invention;

[0023] Figure 2 A perspective view of the limit switch device for controlling the operation of an underwater transporter according to the present invention;

[0024] Figure 3 A side view of the limit switch device for controlling the operation of an underwater transporter according to the present invention;

[0025] Figure 4 A plan view showing an example of a stop signal generator;

[0026] Figure 5 A DC circuit connection diagram of the stop signal generator;

[0027] Figure 6 An AC circuit connection diagram of the stop signal generator.

[0028] DESCRIPTION OF REFERENCE NUMERALS:

[0029] 10: Ice seawater tank 20: Underwater transporter

[0030] 100: Limit switch device for controlling the operation of an underwater transporter

[0031] 110: Chassis 120: Watertight structure

[0032] 130: Stop signal generator 132: Pipe component

[0033] 134: Guide switch operating component 136: Electric wire

[0034] 140: Operating rod unit 142: Operating rod

[0035] 144: Protruding connection part 146: Spring

[0036] 150: Rotation control rod unit 152: Control rod

[0037] 154: Connecting shaft 156: Disc

[0038] 200: Underwater transporter operation system 210: Control board

[0039] 220: Cable Detailed implementation mode

[0040] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0041] Figure 1 The ice seawater tank 10 is shown in the figure. The ice seawater tank 10 is used to generate model ice simulating the physical properties (density, bending strength, elastic coefficient, compressive strength, etc.) of sea ice in polar regions and then conduct tests. When generating model ice in the ice seawater tank 10, in order to conform to the density (0.88 - 0.92 g / cm3) among the physical properties of the model ice, an underwater transport vehicle 20 is provided at the bottom of the tank, and in the test section of the ice seawater tank 10, for example, microbubble water is supplied in a length direction of about 30 m and a width direction of about 30 m.

[0042] The underwater transport vehicle 20 moves about 30 m in the length direction for about 1 hour, and reciprocates in the set section and supplies microbubble water according to the thickness of the model ice, the specified time, and the number of times. A limit switch device for controlling the operation of the underwater transport vehicle according to the present invention is respectively provided at the departure and arrival locations of the underwater transport vehicle 20. As Figure 1 shown, preferably, if two underwater transport vehicles 20 are used, four limit switch devices 100 for controlling the operation of the underwater transport vehicle according to the present invention are provided so that the two underwater transport vehicles 20 can stop or turn around safely.

[0043] As Figures 1 to 6 shown, the function of the limit switch device 100 for controlling the operation of the underwater transport vehicle according to the present invention is to emit an electrical signal when the underwater transport vehicle 20 comes into physical contact, so that the underwater transport vehicle 20 stops or turns around. Therefore, it is suitable for application to the underwater transport vehicle 20 and the underwater transport vehicle operation system 200 equipped with a control board 210 for controlling the operation of the underwater transport vehicle 20.

[0044] As Figure 2 shown, preferably, the limit switch device 100 for controlling the operation of the underwater transport vehicle according to the present invention includes a chassis 110 for fixing to the bottom of the ice seawater tank 10. Preferably, a pair of limit switch devices 100 for controlling the operation of the underwater transport vehicle according to the present invention are provided on the chassis 110. The pair of limit switch devices 100 for controlling the operation of the underwater transport vehicle are connected to each other by a cable 220 and are also connected to the control board 210. The limit switch device 100 for controlling the operation of the underwater transport vehicle according to the present invention may also be provided with one, but, in order to be able to operate normally even when one of them fails or an error occurs, preferably, as Figure 1 and Figure 2 shown, a pair is provided for use. For this purpose, a pair of watertight structures 120 having an internal space are provided at the edge of one side of the chassis 110.

[0045] Inside each watertight structure 120, a stop signal generator 130 is provided, which generates a stop signal indicating that the underwater transport vehicle 20 has reached one side limit point or needs to stop, and provides it to the control board 210. Refer to Figure 3 and Figure 4 , the stop signal generator 130 includes: a pipe component 132 connected to the operating rod 142 and having a guiding switch inside; and a guiding switch operating unit 134 having a magnet inside and installed outside the pipe component 132 to allow the movement of the pipe component 132 to operate the guiding switch. The wire 136 connected to the guiding switch is connected to the control board 210 through the cable 220. The wiring method can be as Figure 5 shown, the stop signal generator 130 and the control board 210 form a 24V DC power supply (PW) line, or as Figure 6 shown, form a 220V AC power supply (PW) line through the protection line 222.

[0046] The above-mentioned stop signal generator 130 can use a widely used float level switch. The float level switch is installed in a water tank or the like and operates the guiding switch according to the increase or decrease of the water level, and can be directly used in the present invention.

[0047] The limit switch device 100 for controlling the operation of the underwater transport vehicle according to the present invention includes a rotation control rod unit 150. The rotation control rod unit 150 is rotatably installed in place on the chassis 110 and is the part through which the underwater transport vehicle 20 operates.

[0048] Preferably, the rotation control rod unit 150 includes: a pair of control rods 152 rotatably installed at intervals; a connecting shaft 154 connecting the pair of control rods 152; and a disc 156 installed on the connecting shaft 154 and protruding forward more than the pair of control rods 152 in an inclined state, so that it can contact the underwater transport vehicle 20 earlier than the pair of control rods 152. Preferably, a plurality of discs 156 are provided at intervals. And each disc 156 can be rotatably installed in place. This is to prevent the underwater transport vehicle 20 in contact with the disc 156 from being scratched by the disc 156. When the control rod 152 operates, the height of the disc 156 changes, and when the disc 156 is fixed, the surface of the underwater transport vehicle 20 will be scratched.

[0049] As shown in the figure, long holes 153 are respectively formed in the pair of control rods 152. This is to connect the operating rod unit 140 described below to make it operate.

[0050] The operating rod unit 140 includes an operating rod 142. One end of the operating rod 142 is connected to the rotation control rod unit 150, and the other end passes through a side wall of the watertight structure 120 and is connected to the stop signal generator 130 inside it. Moreover, a spring 146 is provided on the outer peripheral surface of the operating rod 142 between the watertight structure 120 and the protruding connection portion 144 of the operating rod 142, so that the operating rod unit 140 retreats and returns to its original position.

[0051] Thus, when the control rod 152 rotates in the first direction by the underwater transporter 20, that is, when the underwater transporter 20 pushes the disc 156 provided on the control rod 152 outward, it moves forward and operates to stop the signal generator 130. Thereby, the stop signal generator 130 generates an arrival signal of the underwater transporter 20 and provides it to the control board 210. The control board 210 stops the motor of the underwater transporter 20 or drives it in the reverse direction, so that the underwater transporter 20 stops or turns around.

[0052] When the underwater transporter 20 detaches from the rotation control rod unit 150, the spring 146 causes the operating rod unit 140 to retreat. Thus, the rotation control rod unit 150 connected to the protruding connection portion 144 of the operating rod unit 140 also rotates in the second direction opposite to the initial direction and returns to its original position.

[0053] The speed or the number of reciprocations of the underwater transporter 20 can be set on the control board 210.

[0054] When using the limit switch device 100 for controlling the operation of the underwater transporter according to the present invention described above, the microbubble water underwater transporter 20 can stop at a set position in the ice seawater tank 10 and reciprocate stably in a set section. Thus, microbubble water is supplied to a required section.

[0055] A pair of limit switch devices 100 for controlling the operation of the underwater transporter according to the present invention are provided at positions where the microbubble water underwater transporter 20 needs to stop, which can further improve stability.

[0056] Industrial Applicability

[0057] The present invention can be applied to stop the underwater transporter at a required position or turn it around after stopping. In particular, it can be used for the microbubble water underwater transporter to reciprocate a required number of times in a set section of the ice seawater tank, and supply microbubble water to the water tank in the set section.

Claims

1. A limit switch device for controlling the operation of an underwater transport vehicle, as a limit switch device for controlling the operation of an underwater transport vehicle system having a control panel for controlling the operation of an underwater transport vehicle and the underwater transport vehicle, characterized in that: include: A watertight structure having an interior space; A stop signal generator, which is installed in the watertight structure and generates an arrival signal of the underwater transport vehicle through the control panel; a rotating control rod unit which is rotatably mounted in situ and can be operated by an underwater transport vehicle; and An operating rod unit comprises an operating rod, one end of which is connected to the rotating control rod unit, and the other end of which passes through a side wall of the watertight structure and is connected to the stop signal generator, so that the rotating control rod unit is moved forward when it is rotated in a first direction by the underwater transport vehicle, thereby operating the stop signal generator and generating an arrival signal of the underwater transport vehicle.

2. The limit switch device for controlling the operation of an underwater transport vehicle according to claim 1, characterized in that: The rotating control rod unit includes: a pair of control rods rotatably installed at a distance; a connecting shaft connecting the pair of control rods; and a disc installed on the connecting shaft, protruding forward than the pair of control rods, and capable of contacting the underwater transport vehicle before the pair of control rods.

3. The limit switch device for controlling the operation of an underwater transport vehicle according to claim 2, characterized in that: A long hole is formed in each of the pair of control rods, and the operating rod unit includes a protruding connection portion extending from the operating rod to both sides and coupled to the long hole.

4. The limit switch device for controlling the operation of an underwater transport vehicle according to claim 2, characterized in that: A plurality of the disks are installed at intervals and are rotatably installed in place.

5. The limit switch device for controlling the operation of an underwater transport vehicle according to claim 3, characterized in that: A spring is installed on the outer peripheral surface of the operating rod between the watertight structure and the protruding connection portion to make the operating rod unit retreat and return to its original position.

6. The limit switch device for controlling the operation of an underwater transport vehicle according to claim 1, characterized in that: The stop signal generator comprises: a pipeline component, which is connected to the operating rod and has a guide switch installed inside; and The guide switch operating part has a magnet formed inside and is installed outside the pipe component to allow the pipe component to move, thereby operating the guide switch.

7. The limit switch device for controlling the operation of an underwater transport vehicle according to any one of claims 1 to 6, characterized in that: The limit switch device for controlling the operation of the underwater transport vehicle is installed in a pair at intervals.

Images