Liquid medicine leakage prevention alarm device

Abstract

The utility model relates to the field of liquid medicine sedimentation equipment, and discloses a liquid medicine leakage prevention alarm device which comprises a detection loop, the detection loop comprises a switching power supply, an alarm unit and a sensing switch, and the positive electrode or the negative electrode of the switching power supply is connected with the alarm unit and the sensing switch in sequence through wires and then connected with the negative electrode or the positive electrode of the switching power supply through a wire. The sensing switch is arranged corresponding to a turntable of the ball valve, a sensing pointer is fixedly arranged at the upper end of the turntable, the ball valve is mounted at a discharge hole of the settling tank, the sensing pointer rotates along with the rotation of the turntable, the sensing switch comprises a U-shaped groove, and when the sensing pointer is positioned in the U-shaped groove, the sensing switch is switched off, and the alarm unit loses power and stops working. When the sensing pointer is not located in the U-shaped groove, the sensing switch is closed, and the alarm unit is electrified to start working. According to the utility model, the problem of low production efficiency caused by manual inspection required by the existing leakage detection of the settling tank is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of liquid medicine sedimentation equipment, in particular to a liquid medicine anti-leakage alarm device. BACKGROUND

[0002] The settling tank plays a very important role in the workshop, and the tank body needs to be cleaned after each feeding and discharging, and the sewage will be discharged after cleaning. The workshop settling tank is large in size and large in quantity. The workshop operator may forget to close the tank body sewage valve after cleaning the tank body in the workshop, or may not close it tightly when closing it. This leads to the fact that the following operators do not know whether the sewage valve below is closed well during work, and if it is not closed, it will lead to the risk of feeding above and leaking below, causing incalculable losses and environmental pollution. The traditional method is to arrange personnel to check the corresponding position before each tank body discharging, which not only wastes time but also increases the workload, resulting in low production efficiency. UTILITARIAN CONTENT

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a liquid medicine anti-leakage alarm device to solve the problem of low production efficiency caused by manual inspection of the current settling tank leakage detection.

[0004] The utility model adopts the following technical scheme:

[0005] A liquid medicine anti-leakage alarm device, comprising a detection circuit, the detection circuit comprising a switching power supply, an alarm unit and a sensing switch, the positive or negative of the switching power supply being connected to the alarm unit and the sensing switch in turn through wires and being connected to the negative or positive of the switching power supply through wires, the sensing switch being provided corresponding to the rotating disc of the ball valve, the upper end of the rotating disc being fixedly provided with a sensing pointer, the ball valve being installed at the discharge port of the settling tank, the sensing pointer rotating with the rotation of the rotating disc, the sensing switch comprising a U-shaped groove, the sensing switch being turned off when the sensing pointer is located in the U-shaped groove, the alarm unit being de-energized and stopped working, the sensing switch being turned on when the sensing pointer is not located in the U-shaped groove, and the alarm unit being energized and started working.

[0006] Preferably, in the above-mentioned liquid medicine anti-leakage alarm device, the sensing switch further comprises a switch controller, a photoelectric sensor and a circuit switch, the circuit switch being arranged in the detection circuit, the photoelectric sensor being arranged on the inner side wall of the U-shaped groove, the signal output end of the photoelectric sensor being connected to the signal input end of the switch controller, and the signal output end of the switch controller being connected to the signal output end of the circuit switch, for controlling the opening and closing of the circuit switch according to the signal fed by the photoelectric sensor to realize the control of the opening and closing of the detection circuit.

[0007] Preferably, in the above-mentioned liquid leakage alarm device, the sensor switch further includes a switch control circuit, which is disposed in the detection circuit. The switch control circuit includes a first electrical contact, a second electrical contact, an electrical signal detection unit, a third electrical contact, and a fourth electrical contact. The switch control circuit is connected to the detection circuit through the first electrical contact and the fourth electrical contact. The first electrical contact and the second electrical contact are respectively connected to the electrical signal detection unit through a first wire and a second wire. The electrical signal detection unit has a signal indicator needle, on which the third electrical contact is disposed. The fourth electrical contact is disposed at the zero point position in the electrical signal detection unit, where the electrical signal detection unit is not in operation. When an electrical signal is detected, the signal indicator needle points to the position. When the electrical signal detection unit does not detect an electrical signal, the third electrical contact point contacts the fourth electrical contact point, and the switch control circuit is turned on. A groove is provided in the U-shaped groove, and the first electrical contact point and the second electrical contact point are symmetrically arranged in the groove. An electrical contact block is provided at the end of the sensing pointer away from the turntable. When the sensing pointer is located in the U-shaped groove, the electrical contact block is located in the groove, and the first electrical contact point and the second electrical contact point are connected through the electrical contact block. The electrical signal detection unit can detect an electrical signal, and the signal indicator needle rotates to disconnect the contact between the third electrical contact point and the fourth electrical contact point, and the switch control circuit is cut off.

[0008] Preferably, in the above-mentioned liquid leakage prevention alarm device, the alarm unit includes a discharge port light and a drain port light connected in series.

[0009] Preferably, in the above-mentioned liquid leakage prevention alarm device, both the pouring port light and the drain port light are explosion-proof alarm lights.

[0010] Preferably, in the above-mentioned liquid leakage prevention alarm device, the switching power supply is connected to the power switch via the main power line, and the power switch is connected to the power grid. When the power switch is turned on, the power grid provides power to the switching power supply via the main power line.

[0011] Preferably, the above-mentioned liquid leakage prevention alarm device also includes an external protective component, which is disposed on the outside of the main power line to protect the main power line.

[0012] Preferably, in the above-mentioned liquid leakage prevention alarm device, the outer protective component is a galvanized steel pipe or an explosion-proof hose.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] According to the present invention, a liquid leakage prevention alarm device is provided. Corresponding to the discharge port of the settling tank, a detection circuit is set for the ball valve installed at the discharge port for opening and closing the discharge port. A sensor switch is set in the detection circuit. The sensor switch includes a newly added sensing pointer on the ball valve's turntable. Different positions of the sensing pointer will reflect the opening and closing status of the ball valve at the discharge port, thus realizing the liquid leakage prevention alarm. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a structural diagram of the U-shaped groove of a liquid leakage prevention alarm device according to an embodiment of the present invention.

[0017] Figure 2 The circuit diagram of a liquid leakage prevention alarm device according to an embodiment of the present invention is shown below. Figure 1 .

[0018] Figure 3 This is a three-dimensional cross-sectional view of a ball valve according to the prior art.

[0019] Figure 4 The circuit diagram of a liquid leakage prevention alarm device according to an embodiment of the present invention is shown below. Figure 2 .

[0020] Figure 5 This is another structural diagram of the U-shaped groove of a liquid leakage prevention alarm device according to an embodiment of the present utility model.

[0021] Figure 6 The circuit diagram of a liquid leakage prevention alarm device according to an embodiment of the present invention is shown below. Figure 3 .

[0022] Figure label:

[0023] 1. Switching power supply;

[0024] 2. Alarm unit; 21. Discharge port light; 22. Drain port light;

[0025] 3. Sensor switch; 31. U-shaped groove; 311. Groove; 32. Switch controller; 33. Photoelectric sensor; 331. Light emitter; 332. Light receiver; 34. Circuit switch; 35. Switch control circuit; 351. First electrical contact; 352. Second electrical contact; 353. Electrical signal detection unit; 3531. Signal indicator needle; 354. Third electrical contact; 355. Fourth electrical contact; 356. First wire; 357. Second wire;

[0026] 4. Wires;

[0027] 5. Ball valve; 51. Rotary disc; 52. Valve body; 53. Valve seat; 54. Spring; 55. Upper bearing; 56. Lower bearing; 57. Valve stem; 58. Ball;

[0028] 6. Sensing pointer; 61. Electrical contact block. Detailed Implementation

[0029] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0030] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The present invention will now be further described with reference to the accompanying drawings.

[0033] Currently, settling tanks are one of the commonly used pieces of equipment in the chemical settling process. The discharge port of the settling tank is generally located at the bottom, and the inlet is located at the top. During settling, the discharge port is closed, and the chemical solution enters the settling tank through the inlet. After a set set set time, the discharge port is opened to first discharge the contaminated liquid containing impurities that has settled at the bottom of the settling tank. Then, the remaining clear liquid after settling is discharged into a storage container through the discharge port. During the settling process, the tightness of the discharge port's seal is crucial to the settling effect. Currently, the discharge port is usually sealed by a ball valve. Before each settling process, it is necessary to manually check whether the ball valve is in a completely closed state, resulting in low production efficiency. Therefore, this utility model embodiment provides a chemical solution leak prevention alarm device to reduce this manual inspection step, thereby improving production efficiency.

[0034] like Figure 1 to Figure 2 As shown, the liquid leakage prevention alarm device includes a detection circuit, which includes a switching power supply 1, an alarm unit 2, and a sensor switch 3. The positive or negative terminal of the switching power supply 1 is connected to the alarm unit 2 and the sensor switch 3 in sequence through wires 4, and then connected to the negative or positive terminal of the switching power supply 1 through wires 4. The sensor switch 3 is set corresponding to the turntable 51 of the ball valve 5. A sensing pointer 6 is fixedly set at the upper end of the turntable 51. The ball valve 5 is installed at the discharge port of the settling tank (not shown in the figure). The sensing pointer 6 rotates with the rotation of the turntable 51. The sensor switch 3 includes a U-shaped groove 31. When the sensing pointer 6 is located in the U-shaped groove 31, the sensor switch 3 is open, and the alarm unit 2 loses power and stops working. When the sensing pointer 6 is not located in the U-shaped groove 31, the sensor switch 3 is closed, and the alarm unit 2 is powered on and starts working.

[0035] In this embodiment, the sensor switch 3 controls the operation of the alarm unit 2 in the detection circuit. If the sensor switch 3 is open, the alarm unit 2 is powered on and operates; otherwise, the alarm unit 2 does not operate. The sensor switch 3 monitors the position of the sensing pointer 6. When the sensing pointer 6 is at the set position, the sensor switch 3 is open. At this time, the position of the sensing pointer 6 indicates that the ball valve 5 can completely close the discharge port. If the sensing pointer 6 is not at the set position, the sensor switch 3 is open, the detection circuit is connected, and the alarm unit 2 operates, indicating that the discharge port is not completely closed and there is a risk of leakage. This liquid leakage prevention alarm device is usually activated before the sedimentation process. The activation method is to control the switching power supply 1. If the switching power supply 1 is turned off, the entire detection circuit loses its power source, and the liquid leakage prevention alarm device does not function. If the switching power supply 1 is turned on, the entire detection circuit receives power, and the liquid leakage prevention alarm device functions. Generally, the power supply 1 is turned on before the settling process to check whether the discharge port is in a closed state. During settling, the power supply 1 can be turned on continuously or intermittently to check whether the discharge port is in a closed state during the settling process. In other process stages, such as cleaning the settling tank and discharging the material from the settling tank, the discharge port does not need to be in a closed state, so the power supply 1 can be turned off.

[0036] For example, to better explain the working principle of the sensing switch 3, this embodiment provides a structure of a ball valve existing in the prior art, such as... Figure 3As shown, the ball valve 5 includes a valve body 52, a valve seat 53, a spring 54, an upper bearing 55, a lower bearing 56, a valve stem 57, and a ball 58. The valve body 52 communicates with the discharge port. The valve seat 53 is located inside the valve body 52, and is used to mount the ball 58 inside the valve body 52. ​​The spring 54 between the valve seat 53 and the ball 58 provides a buffering effect. The ball 58 has a through hole 59 penetrating its center. The upper end of the ball 58 is connected to the valve stem 57 via the upper bearing 55, and the valve stem 57 is connected to a turntable 51. The lower end of the ball 58 is connected to the lower bearing 56 located inside the valve body 52. ​​The ball 58 can rotate inside the valve body 52 as the turntable 51 rotates. The rotation power can come from human or mechanical power, such as manually rotating the turntable 51 or using a motor to drive the turntable 51. As the ball 58 rotates, the opening degree of the internal passage of the valve body 52 is controlled. When the turntable 51 rotates 360°, the ball 58 rotates 360° accordingly. During this rotation, the opening of the ball valve 5 varies between 0 and 100 degrees. When the opening of the ball valve 5 is 0 degrees, it indicates that the discharge port is completely closed. Therefore, a sensor pointer 6 is installed on the turntable 51. When the sensor pointer 6 is at a fixed position, the opening of the ball valve 5 is 0 degrees. Thus, only a U-shaped groove 31 needs to be installed at this fixed position. By determining whether the sensor pointer 6 is within the U-shaped groove 31, it can be determined whether the ball valve 5 completely closes the discharge port. This allows for a liquid leakage prevention alarm via the sensor switch 3.

[0037] In some embodiments, a specific structure of the sensing switch 3 is provided, such as Figure 4 As shown, the sensing switch 3 also includes a switch controller 32, a photoelectric sensor 33, and a circuit switch 34. The circuit switch 34 is disposed in the detection circuit, and the photoelectric sensor 33 is disposed on the inner side wall of the U-shaped groove 31. The signal output terminal of the photoelectric sensor 33 is connected to the signal input terminal of the switch controller 32, and the signal output terminal of the switch controller 32 is connected to the signal output terminal of the circuit switch 34. The circuit switch 34 is controlled to open and close according to the signal fed by the photoelectric sensor 33 to realize the control of the opening and closing of the detection circuit.

[0038] In this embodiment, the photoelectric sensor 33 is used to collect photoelectric signals. Taking a transmission-type photoelectric sensor as an example, the photoelectric sensor 33 includes a light emitter 331 and a light receiver 332. The light emitter 331 continuously sends signals to the light receiver 332. The light receiver 332 receives the signals and determines the signal strength, which is then transmitted to the switch controller 32. The switch controller 32 controls the opening and closing of the circuit switch 34 based on the signal strength. When the sensing pointer 6 is located in the U-shaped groove 31, part of the energy of the light emitted by the light emitter 331 is absorbed or reflected, and the transmitted light is received by the light receiver 332. Therefore, a signal strength threshold can be set. If the signal strength received by the switch controller 32 is less than the threshold, it indicates that the sensing pointer 6 is located in the U-shaped groove 31. At this time, the control circuit switch 34 is open, the opening degree of the ball valve 5 is 0, the discharge port of the settling tank is completely closed, and the alarm unit 2 does not work. Conversely, if the opening degree is greater than the threshold, it indicates that the discharge port of the settling tank is not completely closed, the control circuit switch 34 is closed, and the alarm unit 2 works.

[0039] In some embodiments, another specific structure of the sensing switch 3 is provided, such as Figure 5 and Figure 6 As shown, the sensor switch 3 also includes a switch control circuit 35, which is disposed in the detection circuit. The switch control circuit 35 includes a first electrical contact 351, a second electrical contact 352, an electrical signal detection unit 353, a third electrical contact 354, and a fourth electrical contact 355. The switch control circuit 35 is connected to the detection circuit through the first electrical contact 351 and the fourth electrical contact 355. The first electrical contact 351 and the second electrical contact 352 are respectively connected to the electrical signal detection unit 353 through the first wire 356 and the second wire 357. The electrical signal detection unit 353 has a signal indicator needle 3531, on which the third electrical contact 354 is disposed. The fourth electrical contact 355 is disposed at the zero point position in the electrical signal detection unit 353, where the electrical signal detection unit 353 has not detected anything. When an electrical signal is detected, the signal indicator needle 3531 points to the position indicated by the signal indicator needle. When the electrical signal detection unit 353 does not detect an electrical signal, the third electrical contact point 354 and the fourth electrical contact point 355 are in contact, and the switch control circuit 35 is turned on. A groove 311 is provided in the U-shaped groove 31. The first electrical contact point 351 and the second electrical contact point 352 are symmetrically arranged in the groove 311. An electrical contact block 61 is provided at the end of the sensing pointer 6 away from the turntable 51. When the sensing pointer 6 is located in the U-shaped groove 31, the electrical contact block 61 is located in the groove 311. The first electrical contact point 351 and the second electrical contact point 352 are connected through the electrical contact block 61. The electrical signal detection unit 353 can detect the electrical signal, and the signal indicator needle 3531 rotates to disconnect the contact between the third electrical contact point 354 and the fourth electrical contact point 355, and the switch control circuit 35 is cut off.

[0040] In this embodiment, the sensor switch 3 adopts a contact-type switch control. Specifically, the electrical signal detection unit 353 is selected as an existing electronic detection element, here a voltmeter with a pointer is selected. When the sensing pointer 6 is located in the U-shaped groove 31, the electrical contact block 61 is in the groove 311, and the first electrical contact point 351 and the second electrical contact point 352 are connected. At this time, the electrical signal detection unit 353 can detect the voltage signal, so its signal indicator needle 3531 deflects, causing the third electrical contact point 354 and the fourth electrical contact point 355 to disconnect, thereby cutting off the entire detection circuit and the alarm unit 2 does not work. If the sensing pointer 6 is not in the U-shaped groove 31, the first electrical contact point 351 and the second electrical contact point 352 are not connected. When the electrical signal detection unit 353 does not detect an electrical signal, the signal indicator needle 3531 points to the zero position. The third electrical contact point 354 and the fourth electrical contact point 355 on the signal indicator needle 3531 come into contact, making the detection circuit in a conductive state. The alarm unit 2 works to remind that the discharge port of the settling tank is not completely closed and there is a risk of leakage.

[0041] In some embodiments, such as Figure 2 As shown, the alarm unit 2 includes a discharge port light 21 and a drain port light 22 connected in series; wherein, both the discharge port light 21 and the drain port light 22 are explosion-proof alarm lights.

[0042] In some embodiments, the switching power supply 1 is connected to a power switch via a main power line. The power switch is connected to the power grid. When the power switch is turned on, the power grid provides power to the switching power supply via the main power line. The power supply also includes an external protective component, which is located on the outside of the main power line to protect it. The external protective component is a galvanized steel pipe or an explosion-proof flexible conduit.

[0043] In this embodiment, the switching power supply 1 is a power module, which converts the electrical signal connected to the power grid into the electrical signal required by the electronic components in the detection circuit. For example, the switching power supply 1 can convert the connected AC signal into a DC signal and change the voltage of the electrical signal so that its voltage meets the working voltage requirements of the alarm unit 2 and the sensor switch 3.

[0044] The following embodiment will detail how the liquid leakage prevention alarm device is specifically installed in an existing sedimentation production line.

[0045] The main and auxiliary materials used in this construction are shown in Tables 1 and 2:

[0046] Table 1. List of Main Materials

[0047] Serial number Product category Remarks 1 Industrial explosion-proof box 2 Power main line 3 Switching power supply 4 Sensor 5 Explosion-proof alarm lamp 6 Induction pointer 7 Explosion-proof junction box 8 Galvanized steel pipe 9 Explosion-proof hose 10 Warning sign 11 Elbow

[0048] Table 2. List of Auxiliary Materials

[0049] Serial number Product category Remarks 1 U-shaped card 2 Seat card 3 Angle steel 4 Other auxiliary materials Screws, tapes, ribbons, tapes, iron wires, etc.

[0050] The construction process includes the following steps:

[0051] Step 1, construction preparation, including:

[0052] Step 101: Familiarize yourself with the construction drawings and technical requirements, and clarify the installation location and connection method of each product.

[0053] Step 102: Inspect the construction site to ensure that the conditions for construction are met, such as a level site, good lighting, and isolation of flammable and explosive materials.

[0054] Step 103: Prepare the necessary tools and equipment for construction, such as: electric drill, wrench, screwdriver, welding machine, tapping machine, cutting machine, lathe tool, pipe bending machine, etc.

[0055] Step 104: Preliminary site clearance. Due to the special construction conditions and high construction requirements, there is industrial alcohol in the factory area. It must be evacuated before construction. The site and equipment in the factory area must be cleaned, ventilation must be maintained, and data must be tested daily with an alcohol tester. Construction can only begin under safe conditions.

[0056] Step 105: Verify the professionalism of welders and electricians, who must at least possess relevant operating certificates.

[0057] Step 2, material inspection, including:

[0058] Step 201: Inspect all products to check their appearance for any damage, deformation, or other issues.

[0059] Step 202: Verify that the product specifications, model, and quantity are consistent with the design requirements.

[0060] Step 203: Check the product's quality certification documents, such as the certificate of conformity and inspection report, to ensure that they are complete and that the product is not a counterfeit or substandard product.

[0061] Step 3, the installation process, includes:

[0062] Step 301, Installation of industrial explosion-proof enclosure.

[0063] Determine the installation location of the explosion-proof enclosure according to the design requirements, and fix it to the wall or bracket using expansion bolts. Check the airtightness of the explosion-proof enclosure to ensure a good seal between the enclosure body and the cover. Install and wire the internal electrical components according to the electrical schematic diagram.

[0064] Step 302, laying the main power line.

[0065] Determine the laying path of the main power line, avoiding intersections with other pipelines as much as possible. Use galvanized steel pipes or explosion-proof flexible conduits to protect the main power line, ensuring the safety and reliability of the circuit. Connect the main power line to the power switch inside the explosion-proof box.

[0066] Step 303, Install the switching power supply.

[0067] Choose a suitable location to install the switching power supply, ensuring good ventilation. Connect the input and output lines of the switching power supply to the main power line and the sensors, etc., respectively.

[0068] Step 304, sensor installation.

[0069] Select a suitable installation location based on the sensor type and installation requirements. Secure the sensor in the installation location and connect the signal cables.

[0070] Step 305: Install explosion-proof alarm lights.

[0071] Determine the installation location of the explosion-proof alarm light so that it can sound an alarm promptly in dangerous situations. Secure the alarm light to the wall or bracket using expansion bolts, and connect the power cord and signal cable.

[0072] Step 306, Install the sensor pointer.

[0073] Install the sensor pointer according to the design requirements, ensuring it accurately indicates the operating status of the equipment. Connect the signal cable of the sensor pointer.

[0074] Step 307: Install the explosion-proof junction box.

[0075] Choose a suitable location to install an explosion-proof junction box for easy wiring connection and maintenance. Connect the wiring into the junction box and connect the wires according to the electrical schematic diagram.

[0076] Step 308: Laying of galvanized steel pipes and explosion-proof flexible hoses.

[0077] Lay galvanized steel pipes and explosion-proof flexible conduits according to design requirements to ensure proper protection of the wiring. Grounding the galvanized steel pipes is also required to ensure safety.

[0078] Step 309: Install warning signs.

[0079] Warning signs should be installed in prominent locations at the construction site to remind people to pay attention to safety.

[0080] Step 4, Debugging and Acceptance, including:

[0081] Step 401: After installation, debug the entire system and check whether the operating status of each device is normal.

[0082] Step 402 involves performing insulation resistance tests and grounding resistance tests on the electrical system to ensure its safety and reliability.

[0083] Step 403: Invite relevant organizations to conduct acceptance testing, and put the product into use after passing the acceptance test.

[0084] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A liquid leakage prevention alarm device, characterized in that, The system includes a detection circuit comprising a switching power supply, an alarm unit, and a sensor switch. The positive or negative terminal of the switching power supply is connected to the alarm unit and the sensor switch sequentially via wires, and then connected to the negative or positive terminal of the switching power supply via wires. The sensor switch is positioned corresponding to the turntable of a ball valve. A sensing pointer is fixedly mounted on the upper end of the turntable. The ball valve is installed at the discharge port of the settling tank. The sensing pointer rotates as the turntable rotates. The sensor switch includes a U-shaped groove. When the sensing pointer is within the U-shaped groove, the sensor switch is open, and the alarm unit loses power and stops working. When the sensing pointer is not within the U-shaped groove, the sensor switch is closed, and the alarm unit is powered on and begins to work.

2. The liquid leakage prevention alarm device according to claim 1, characterized in that, The sensing switch also includes a switch controller, a photoelectric sensor, and a circuit switch. The circuit switch is disposed in the detection circuit, and the photoelectric sensor is disposed on the inner side wall of the U-shaped groove. The signal output terminal of the photoelectric sensor is connected to the signal input terminal of the switch controller, and the signal output terminal of the switch controller is connected to the signal output terminal of the circuit switch. The circuit switch is used to control the opening and closing of the detection circuit according to the signal fed by the photoelectric sensor.

3. The liquid leakage prevention alarm device according to claim 1, characterized in that, The sensing switch further includes a switch control circuit, which is disposed in the detection circuit. The switch control circuit includes a first electrical contact, a second electrical contact, an electrical signal detection unit, a third electrical contact, and a fourth electrical contact. The switch control circuit is connected to the detection circuit through the first and fourth electrical contacts. The first and second electrical contacts are respectively connected to the electrical signal detection unit through a first wire and a second wire. The electrical signal detection unit has a signal indicator needle, on which the third electrical contact is disposed. The fourth electrical contact is disposed at the zero-point position in the electrical signal detection unit, whereby the electrical signal detection unit does not detect an electrical signal. When the electrical signal detection unit does not detect an electrical signal, the third electrical contact point contacts the fourth electrical contact point, and the switch control circuit is activated. A groove is provided within the U-shaped groove, and the first and second electrical contacts are symmetrically positioned within this groove. An electrical contact block is provided at the end of the sensing pointer furthest from the turntable. When the sensing pointer is located within the U-shaped groove, the electrical contact block is located within the groove. The first and second electrical contacts are connected through this contact block. The electrical signal detection unit can detect the electrical signal, and the signal indicator needle rotates to disconnect the contact between the third and fourth electrical contacts, thus cutting off the switch control circuit.

4. The liquid leakage prevention alarm device according to claim 1, characterized in that, The alarm unit includes a discharge port light and a drain port light connected in series.

5. The liquid leakage prevention alarm device according to claim 4, characterized in that, Both the discharge port light and the drain port light are explosion-proof alarm lights.

6. The liquid leakage prevention alarm device according to claim 1, characterized in that, The switching power supply is connected to a power switch via a main power line. The power switch is connected to the power grid. When the power switch is turned on, the power grid provides power to the switching power supply through the main power line.

7. The liquid leakage prevention alarm device according to claim 6, characterized in that, It also includes an external protective component, which is disposed on the outside of the main power line to protect the main power line.

8. The liquid leakage prevention alarm device according to claim 7, characterized in that, The outer protective component is a galvanized steel pipe or an explosion-proof flexible hose.

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