Cheap automatic closing device suitable for water supply ball valve

Abstract

The invention relates to the technical field of water pipe control, in particular to a cheap automatic closing device suitable for a water supply ball valve, which is used for closing the ball valve on a pipeline and comprises a fixing frame, a detector, a limiting rod and a closing assembly, the fixing frame is detachably and fixedly mounted on the outer side of the pipeline, the limiting rod is arranged on the fixing frame, and the closing assembly is mounted between the limiting rod and the ball valve. And after the detector detects the liquid, the limiting rod acts. The device is reasonable and compact in structure, when the device is used, the detection end of the detector is installed at the position to be detected, after the detector detects liquid, the limiting rod moves upwards or downwards or breaks, and therefore the closing assembly rotates the right end of the handle of the ball valve to rotate backwards to close the ball valve; and the fixing frame is detachably and fixedly installed on the outer side of the pipeline, so that the limiting rod and the closing assembly are convenient to disassemble and assemble, and the transformation difficulty and cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water pipe control, and is an inexpensive automatic closing device applicable to a water supply ball valve. Background Art

[0002] Existing water-using devices, such as washing machines and water purifiers used in daily life, or water replenishing tanks in engineering. The valves on these water-using devices generally adopt ball valves. A ball valve is a valve in which the closing member is driven by a valve stem and rotates around the axis of the ball valve. It can also be used for the regulation and control of fluids. The ball valve is mainly used to cut off, distribute, and change the flow direction of the medium in the pipeline. It can be tightly closed with only a 90-degree rotation operation and a very small rotational torque. The connection of these water-using devices relies on pipelines formed by various water pipes and connectors, which are usually in an open state. When a fault occurs inside the device, it is easy to cause water leakage. If the water source cannot be closed in time when water leakage occurs, a large amount of water leakage will occur, which will not only cause waste of water resources, but also the water leakage will damage other devices or flow into the cabinet or floor, causing huge losses. The existing closing devices used for water leakage after a fault in water-using devices have the disadvantages of great modification difficulty and high cost. Summary of the Invention

[0003] The present invention provides an inexpensive automatic closing device applicable to a water supply ball valve, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems of great modification difficulty and high cost existing in the closing device for water leakage after a fault in existing water-using devices.

[0004] The technical solution of the present invention is realized by the following measures: An inexpensive automatic closing device applicable to a water supply ball valve, used for closing the ball valve on the pipeline, includes a fixing frame, a detector, a limiting rod, and a closing component. The fixing frame is detachably and fixedly installed on the outer side of the pipeline. A limiting rod is provided on the fixing frame, and a closing component is installed between the limiting rod and the ball valve. When the detector detects liquid, the limiting rod acts, and at the same time, the closing component rotates the handle of the ball valve by a certain angle to close the ball valve.

[0005] The following is a further optimization and / or improvement of the above-mentioned technical solution of the invention: As a preference, the above-mentioned fixing bracket may include a fixing rod and a first pipe clamp. A fixing rod is provided on the front side of the pipe corresponding to the right end position of the handle of the ball valve. The lower part of the fixing rod is detachably and fixedly installed on the pipe through the first pipe clamp. A fixing plate located above the handle of the ball valve is fixedly installed on the rear side of the upper end of the fixing rod. A first positioning hole penetrating up and down is provided on the upper side of the rear part of the fixing plate. A limiting rod is provided on the right part of the handle of the ball valve, and the upper part of the limiting rod is inserted into the first positioning hole. After the detector detects the liquid, the limiting rod can axially move and separate from the fixing plate. The closing assembly includes a scroll spring sleeved outside the gland of the ball valve. The inner end of the scroll spring is clamped outside the valve body of the ball valve. The outer end of the scroll spring extends to the right and abuts against the front side of the right end of the handle of the ball valve. After the limiting rod separates from the fixing plate, the scroll spring rotates the handle of the ball valve by a certain angle to close the ball valve.

[0006] The above-mentioned detector may include a first power supply module, a mounting sleeve, an electromagnet and a first liquid leakage switch. A mounting sleeve is fixedly installed at the right end of the handle of the ball valve. An electromagnet is fixedly installed inside the mounting sleeve. The upper end of the iron core of the electromagnet is detachably and fixedly installed together with the lower end of the limiting rod. The coil of the electromagnet and the first liquid leakage switch are both connected to the first power supply module; or, a mounting sleeve is fixedly installed at the right end of the handle of the ball valve. An electromagnet is fixedly installed inside the mounting sleeve. The upper end of the iron core of the electromagnet is detachably and fixedly installed together with the lower end of the limiting rod. The coil of the electromagnet and the first liquid leakage switch are both connected to the first power supply module.

[0007] As a preference, the above-mentioned fixing bracket may include a fixing frame. A fixing frame is fixedly installed on the outer side of the pipe corresponding to the left side of the ball valve. The fixing frame is in a U shape with an opening facing backward. A guide rod is fixedly installed on the upper side of the left part of the fixing frame. The limiting rod is a heat fuse whose right end is fixedly installed with the fixing frame. The closing assembly includes a guide rod, a connecting rope and an elastic resetting member capable of extending and retracting. The left part of the elastic resetting member is installed with the left part of the fixing frame. The right part of the elastic resetting member extends and is installed with the left end of the heat fuse. The right part of the handle of the ball valve is fixedly connected to the first end of the connecting rope. The second end of the connecting rope bypasses the guide rod and is connected to the right part of the elastic resetting member. After the detector detects the liquid, the heat fuse can be broken. After the heat fuse is broken, the elastic resetting member retracts and rotates the handle of the ball valve by a certain angle through the connecting rope to close the ball valve.

[0008] The above-mentioned detector may include a second power supply module and a first liquid leakage switch. The heat fuse and the second liquid leakage switch are both connected to the second power supply module.

[0009] At least two second pipe clamps may be provided at intervals left and right on the front part of the above-mentioned fixing frame, and each second pipe clamp can be detachably and fixedly installed on the outer side of the pipe.

[0010] A guide wheel may be rotatably installed on the outer side of the above-mentioned guide rod. A guide groove with an opening facing outward is provided on the outer side of the middle part of the guide wheel. The left part of the connecting rope is wound in the guide groove.

[0011] The structure of the present invention is reasonable and compact. When in use, the detection end of the detector is installed at the position to be detected. After the detector detects the liquid, the limit rod moves upward, downward or breaks. In this way, when the handle at the right end of the ball valve of the closing assembly rotates backward until it is perpendicular to the pipeline, the ball valve is closed, so that the pipeline can be cut off, avoiding the continuous inflow of water in the pipeline into the equipment and container, thereby preventing the continuous occurrence of water leakage caused by the overflow of water in the equipment and container. The fixing frame is detachably and fixedly installed on the outer side of the pipeline, facilitating the disassembly and assembly of the limit rod and the closing assembly, and reducing the transformation difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 is the front view structural schematic diagram of Embodiments 1 to 3 of the present invention.

[0013] Attached Figure 2 is the rear view structural schematic diagram of Embodiments 1 to 3 of the present invention.

[0014] Attached Figure 3 is the top view structural schematic diagram of Embodiments 1 to 3 of the present invention.

[0015] Attached Figure 4 is the left view structural schematic diagram of Embodiments 1 to 3 of the present invention.

[0016] Attached Figure 5 is the right view cross-sectional structural schematic diagram of Embodiments 1 to 3 of the present invention.

[0017] Attached Figure 6 is the top view structural schematic diagram of the scroll spring in Embodiments 1 to 3 of the present invention.

[0018] Attached Figure 7 is the right view structural schematic diagram of the handle in Embodiments 1 to 3 of the present invention.

[0019] Attached Figure 8 is the circuit structural schematic diagram of Embodiment 3 of the present invention.

[0020] Attached Figure 9 is the front view structural schematic diagram of Embodiment 4 of the present invention.

[0021] Attached Figure 10 is the rear view partial cross-sectional structural schematic diagram of Embodiment 4 of the present invention.

[0022] Attached Figure 11 is the front view structural schematic diagram of Embodiments 5 to 8 of the present invention.

[0023] Attached Figure 12 is the top view structural schematic diagram of Embodiments 5 to 8 of the present invention.

[0024] Attached Figure 13Schematic diagram of the circuit structures of Embodiments Six to Eight of the present invention.

[0025] The codes in the attached drawings are respectively: 1 is a pipeline, 2 is a ball valve, 3 is a limit rod, 4 is a handle, 5 is a limit block, 6 is a fixing block, 7 is a fixing rod, 8 is a first pipe clamp, 9 is a fixing plate, 10 is a first positioning hole, 11 is a scroll spring, 12 is a valve stem, 13 is a mounting sleeve, 14 is an electromagnet, 15 is a limit through hole, 16 is a fixing frame, 17 is a guide rod, 18 is a thermal fuse, 19 is a connecting rope, 20 is an elastic reset member, 21 is a ring nut, 22 is a bolt, 23 is a second pipe clamp, 24 is a guide wheel, 25 is a guide groove. Specific embodiments

[0026] The present invention is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solutions of the present invention and the actual situation.

[0027] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is carried out according to the layout mode of the attached drawings of the specification, such as: the positional relationships of front, rear, upper, lower, left, right, etc. are determined according to the layout direction of the attached drawings of the specification. Figure 1 The positional relationships of front, rear, upper, lower, left, right, etc. are determined according to the layout direction of the attached drawings of the specification. Figure 1 are determined according to the layout direction of the attached drawings of the specification.

[0028] The present invention will be further described below in conjunction with the embodiments and the attached drawings: Embodiment 1: As shown in the attached Figures 1 to 5 drawings, the low-cost automatic closing device applicable to a water supply ball valve is used for closing the ball valve 2 on the pipeline 1, and includes a fixing frame, a detector, a limit rod 3 and a closing assembly. The fixing frame is detachably and fixedly installed on the outer side of the pipeline 1. A limit rod 3 is provided on the fixing frame. A closing assembly is installed between the limit rod 3 and the ball valve 2. When the detector detects liquid, the limit rod 3 is actuated, and at the same time, the closing assembly rotates the handle 4 of the ball valve 2 by a certain angle and then closes the ball valve 2.

[0029] According to requirements, the ball valve 2 is a known prior art. When the handle 4 of the ball valve 2 is parallel to the pipeline 1, the ball valve 2 is in an open state. When the handle 4 of the ball valve 2 is perpendicular to the pipeline 1, the ball valve 2 is in a closed state. There are two limit blocks 5 on the outer side of the valve body of the ball valve 2. A fixing block 6 is fixed to the left end of the handle 4 of the ball valve 2. When one side of the fixing block 6 is in contact with the front side of the rear limit block 5, the handle 4 of the ball valve 2 is parallel to the pipeline 1, that is, the ball valve 2 is in an open state. When the other side of the fixing block 6 rotates (forward rotation in this embodiment, that is, the right end of the handle 4 of the ball valve 2 rotates backward) and is in contact with the left side of the front limit block 5, the handle 4 of the ball valve 2 is perpendicular to the pipeline 1, that is, the ball valve 2 is in a closed state.

[0030] During use, install the detection end of the detector at the position to be detected. After the detector detects the liquid, the limit rod 3 moves upward, downward or breaks, and the limit rod 3 no longer restricts the closing component. In this way, the closing component rotates the handle 4 of the ball valve 2 to the right and rotates backward until it is perpendicular to the pipeline 1 (rotating 90 degrees) to close the ball valve 2, so as to cut off the pipeline 1 and avoid the continuous inflow of water in the pipeline 1 into the equipment and container, thereby avoiding the continuous occurrence of water leakage caused by the overflow of water in the equipment and container. The fixing bracket is detachably and fixedly installed on the outer side of the pipeline 1, which is convenient for the disassembly and assembly of the limit rod 3 and the closing component, and can reduce the transformation difficulty and cost.

[0031] According to actual needs, the above-mentioned inexpensive automatic closing device applicable to the water supply ball valve can be further optimized or / and improved: Embodiment 2: As an optimization of the above embodiment, as shown in the appendix Figures 1 to 7 As shown, the fixing bracket includes a fixing rod 7 and a first pipe clamp 8. A fixing rod 7 is provided on the front side of the pipeline 1 corresponding to the right end position of the handle 4 of the ball valve 2. The lower part of the fixing rod 7 is detachably and fixedly installed with the pipeline 1 through the first pipe clamp 8. A fixing plate 9 located above the handle 4 of the ball valve 2 is fixedly installed on the rear side of the upper end of the fixing rod 7. A first positioning hole 10 penetrating up and down is provided on the upper side of the rear part of the fixing plate 9. A limit rod 3 with its upper part inserted into the first positioning hole 10 is provided on the right part of the handle 4 of the ball valve 2. After the detector detects the liquid, the limit rod 3 can be axially moved to be separated from the fixing plate 9. The closing component includes a volute spring 11 sleeved outside the gland of the ball valve 2. The inner end of the volute spring 11 is clamped outside the valve body of the ball valve 2. The outer end of the volute spring 11 extends to the right and abuts against the front side of the right end of the handle 4 of the ball valve 2. After the limit rod 3 is separated from the fixing plate 9, the volute spring 11 rotates the handle 4 of the ball valve 2 by a certain angle to close the ball valve 2.

[0032] According to requirements, the first pipe clamp 8 is a known prior art, such as a U-shaped pipe clamp, a hoop or a U-shaped bolt, and both the fixing rod 7 and the fixing plate 9 are plate-shaped structures. During use, the setting of the first pipe clamp 8 facilitates the disassembly and assembly between the fixing rod 7 and the pipeline 1, and the disassembly and assembly are convenient. Two connecting screw holes (or through holes) are provided at intervals up and down on the lower part of the fixing rod 7. The first pipe clamp 8 is sleeved outside the pipeline 1. Connecting bolts (or connecting bolts with nuts screwed after passing through the through holes at the rear end) are provided at the upper and lower parts of the first pipe clamp 8 and are screwed into the corresponding connecting screw holes at the rear end. In this way, the fixing rod 7 is detachably and fixedly installed with the pipeline 1 through the first pipe clamp 8 and the connecting bolts, and the disassembly and assembly cost is low. The fixing plate 9 and the fixing rod 7 can be integrally provided, or can be detachably and fixedly installed with the upper end of the fixing rod 7 through spaced connectors (such as bolts).

[0033] The scroll spring 11 is horizontally arranged and sleeved outside the valve stem 12 of the ball valve 2 below the handle 4. The inner end of the scroll spring 11 first bends downward, then extends downward along the outside of the valve body of the ball valve 2 and bypasses the lower outside of the valve body of the ball valve 2 and is located behind the valve body of the ball valve 2. In this way, the inner end of the scroll spring 11 can hold the valve body of the ball valve 2. The outer end of the scroll spring 11 bends to the right and extends to the front side of the right part of the handle 4 of the ball valve 2, then bends upward to the upper side of the handle 4 of the ball valve 2, and finally bends backward so that the outer end of the scroll spring 11 abuts against the front side of the right part of the handle 4 of the ball valve 2. In this embodiment, the scroll spring 11 contracts, and the outer end of the scroll spring 11 has a backward acting force on the handle 4 of the ball valve 2, that is, at this time, the right end of the handle 4 of the ball valve 2 has a tendency to rotate backward. Since the limiting rod 3 with the lower end installed together with the handle 4 of the ball valve 2 is arranged in the first positioning hole 10 of the fixing plate 9, the handle 4 of the ball valve 2 can be limited.

[0034] When the detector detects the liquid, it drives the limiting rod 3 to axially move. In this embodiment, after the limiting rod 3 moves downward, the upper end of the limiting rod 3 is separated from the fixing plate 9. In this way, the limiting rod 3 no longer limits the handle 4 of the ball valve 2. The scroll spring 11 unfolds, and the outer end of the scroll spring 11 drives the right end of the handle 4 of the ball valve 2 to rotate backward until the handle 4 of the ball valve 2 is perpendicular to the pipeline 1 and reaches the closed state, thereby avoiding the continuous occurrence of water leakage.

[0035] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figures 1 to 5 Figures 7 and 8, the detector includes a first power supply module, a mounting sleeve 13, an electromagnet 14 and a first liquid leakage switch. The right end of the handle 4 of the ball valve 2 is fixedly installed with a mounting sleeve 13, and an electromagnet 14 is fixedly installed in the mounting sleeve 13. The upper end of the iron core of the electromagnet 14 is detachably and fixedly installed together with the lower end of the limiting rod 3. The coil of the electromagnet 14 and the first liquid leakage switch are both connected to the first power supply module.

[0036] According to requirements, the first power supply module is all well-known prior art, such as a 24V lithium battery. The first power supply module can be fixedly installed on the front side of the fixed rod 7. The electromagnet 14 is well-known prior art, such as a 1564BDC24V through-push-pull type small DC electromagnet. The upper end of the iron core of the electromagnet 14 has a radially penetrating connection hole, and the lower end of the limiting rod 3 has a radially penetrating mounting hole. A connecting screw rod with an end located in the connection hole is provided in the mounting hole. In this way, the upper end of the iron core of the electromagnet 14 and the lower end of the limiting rod 3 are detachably and fixedly installed together, facilitating the disassembly and assembly of the electromagnet 14. The mounting sleeve 13 can be a rectangular pipe or a box-shaped structure with an open upper side. The electromagnet 14 is fixed on the inner wall of the mounting sleeve 13. The first liquid leakage switch is well-known prior art, such as a 24V water level detection switch of model FS-IR1902D-NPN normally open type. The positive pole of the first power supply module is connected to the positive pole of the first liquid leakage switch, and the negative pole of the first liquid leakage switch is connected to the negative pole of the first power supply module. One end of the coil of the electromagnet 14 is connected to the positive pole of the first power supply module, and the other end of the coil of the electromagnet 14 and the output end of the first liquid leakage switch are connected. The first liquid leakage switch can be installed at a position prone to water leakage according to requirements by using well-known brackets. When a liquid leakage phenomenon occurs, after the first liquid leakage switch detects the water leakage, its output end is energized, and both ends of the coil of the electromagnet 14 are electrically connected between the positive and negative poles of the first power supply. After the coil of the electromagnet 14 is energized, the iron core is sucked in, that is, after the coil of the electromagnet 14 is energized, the iron core moves downward. After the iron core moves downward, it drives the upper end of the limiting rod 3 to move downward and separate from the fixing plate 9. In this way, the limiting rod 3 no longer exerts a constraint and limiting effect on the handle 4 of the ball valve 2. The torsion spring 11 unfolds, and the outer end of the torsion spring 11 drives the right end of the handle 4 of the ball valve 2 to rotate backward until the handle 4 of the ball valve 2 is perpendicular to the pipeline 1 and reaches the closed state, thereby avoiding the continuous occurrence of water leakage.

[0037] Embodiment 4: As another optimization of Embodiment 3, as shown in the attached Figure 9 , 10 figure, the detector includes a first power supply module, a mounting sleeve 13, an electromagnet 14, and a first liquid leakage switch. A limiting through-hole 15 corresponding to the first positioning hole 10 is provided on the upper side of the right part of the handle 4 of the ball valve 2. The lower end of the limiting rod 3 is located in the limiting through-hole 15. The mounting sleeve 13 is fixedly installed on the upper side of the fixing plate 9. An electromagnet 14 is fixedly installed in the mounting sleeve 13. The lower end of the iron core of the electromagnet 14 and the upper end of the limiting rod 3 in the first positioning hole 10 are detachably and fixedly installed together. The coil of the electromagnet 14 and the first liquid leakage switch are both connected to the first power supply module.

[0038] After the first liquid leakage switch detects liquid, both ends of the coil of the electromagnet 14 are electrically connected between the positive and negative poles of the first power supply. After the coil of the electromagnet 14 is energized, the iron core is drawn in. That is, after the coil of the electromagnet 14 is energized, the iron core moves upward, thereby driving the limit rod 3 to move upward and separate from the handle 4 of the ball valve 2. In this way, the limit rod 3 no longer restricts and positions the handle 4 of the ball valve 2. The spiral spring 11 unfolds, and the outer end of the spiral spring 11 drives the right end of the handle 4 of the ball valve 2 to rotate backward until the handle 4 of the ball valve 2 is perpendicular to the pipeline 1 and reaches the closed state, thus avoiding the continuous occurrence of water leakage.

[0039] Embodiment 5: As another optimization of Embodiment 2, as shown in Figure 11 , 12 , and 13, the fixing frame includes a fixing frame 16. A fixing frame 16 is fixedly installed on the outer side of the pipeline 1 corresponding to the left side of the ball valve 2. The fixing frame 16 is in a U shape with an opening facing backward. A guide rod 17 is fixedly installed on the upper side of the left part of the fixing frame 16. The limit rod 3 is a heat fuse 18 whose right end is fixedly installed with the fixing frame 16. The closing assembly includes a guide rod 17, a connecting rope 19, and an elastic reset member 20 that can extend and retract. The left part of the elastic reset member 20 is installed with the left part of the fixing frame 16. After the right part of the elastic reset member 20 extends, it is installed with the left end of the heat fuse 18. The right part of the handle 4 of the ball valve 2 is fixedly connected to the first end of the connecting rope 19. The second end of the connecting rope 19 bypasses the guide rod 17 and is connected to the right part of the elastic reset member 20. After the detector detects liquid, it can cause the heat fuse 18 to break. After the heat fuse 18 breaks, the elastic reset member 20 retracts and rotates the handle 4 of the ball valve 2 by a certain angle through the connecting rope 19 to close the ball valve 2.

[0040] According to requirements, the connecting rope 19 can be an existing well-known technology, such as PE fishing line, high-strength fishing line, strong nylon sewing thread, or stainless steel wire. The elastic reset member 20 is an existing well-known technology, such as a tension spring or a latex tube. The heat fuse 18 is an existing well-known technology.

[0041] During installation, first fix the right end of the thermal fuse 18 inside the right part of the fixing frame 16. For easy disassembly and assembly, install a ring nut 21 or a fixing ring inside the right part of the fixing frame 16, and fix the right end of the thermal fuse 18 on the ring nut 21 or the fixing ring. Then install the left end of the elastic reset member 20 on the left part of the fixing frame 16. For easy disassembly and assembly of the elastic reset member 20, fix a vertically arranged connecting rod or a connecting ring on the upper side of the left part of the fixing frame 16, hook the left end of the tension spring on the connecting rod or inside the connecting ring, or fix the left end of the latex tube on the outside of the connecting rod or tie it to the connecting ring. Then fix the right end of the elastic reset member 20 and the left end of the thermal fuse 18 together after stretching the right end of the elastic reset member 20. Immediately afterwards, fixedly connect the first end of the connecting rope 19 to the right end of the handle 4 of the ball valve 2. For easy connection between the first end of the connecting rope 19 and the handle 4 of the ball valve 2, a bolt 22 can be welded on the lower right side of the handle 4 of the ball valve 2, or a fixing through hole can be provided on the upper right side of the handle 4 of the ball valve 2, so that the first end of the connecting rope 19 can be tied to the outside of the bolt 22 or tied together after passing through the fixing through hole. Finally, fixedly connect the second end of the connecting rope 19 to the right end of the elastic reset member 20, and the fixed connection method can be the well-known tying and fixing in the prior art.

[0042] During use, the setting of the fixing frame 16 facilitates the disassembly and assembly of the closing component, thereby reducing the modification difficulty of the cheap automatic closing device applicable to the water supply ball valve and reducing the disassembly and assembly cost. The guide rod 17 is located behind the valve stem 12 of the ball valve 2. After the elastic reset member 20 retracts and the detector detects liquid, the thermal fuse 18 breaks after a large current flows through it. The elastic reset member 20 is no longer restricted by the thermal fuse 18, and the elastic reset member 20 begins to retract, then pulls the connecting rope 19, and the connecting rope 19 pulls the right end of the handle 4 of the ball valve 2 to rotate backward until it is perpendicular to the pipeline 1, and finally closes the ball valve 2, preventing the pipeline 1 from continuing to inject water into the device or the box body, thereby preventing the leakage phenomenon from continuing to occur.

[0043] Embodiment Six: As an optimization of the above embodiment, as shown in the attached Figure 13 figure, the detector includes a second power supply module and a first liquid leakage switch, and the thermal fuse 18 and the second liquid leakage switch are both connected to the second power supply module.

[0044] According to requirements, the second power supply module is a well-known existing technology, such as a lithium battery, and the second liquid leakage switch is a well-known existing technology, such as an NPN normally open water level detection switch. The positive pole of the second power supply module is connected to the positive pole of the second liquid leakage switch, and the negative pole of the second liquid leakage switch is connected to the negative pole of the second power supply module. One end of the thermal fuse 18 is connected to the positive pole of the second power supply module, and the other end of the thermal fuse 18 is connected to the output end of the second liquid leakage switch. The second liquid leakage switch can be installed at a position prone to water leakage according to requirements by using a well-known existing bracket. When a liquid leakage phenomenon occurs, after the second liquid leakage switch detects water leakage, the output end is electrified, and both ends of the thermal fuse 18 are conducted between the positive pole and the negative pole of the second power supply module. After the thermal fuse 18 is electrified, it breaks. In this way, the thermal fuse 18 no longer has a restraining and limiting effect on the handle 4 of the ball valve 2, and the right end of the elastic reset member 20 retracts. The right end of the elastic reset member 20 drives the right end of the handle 4 of the ball valve 2 to rotate backward through the connecting rope 19 until the handle 4 of the ball valve 2 is perpendicular to the pipeline 1 (rotates 90 degrees) and reaches the closed state, thereby avoiding the continuous occurrence of water leakage. In order to improve the insulation performance, insulating coatings are provided at the connections between both ends of the thermal fuse 18, the elastic reset member 20, and the fixing frame 16 (ring nut 21), such as brushing insulating paint or covering with an insulating sleeve.

[0045] Embodiment Seven: As an optimization of the above embodiment, as shown in the attached Figure 11 、 12 figure, at least two second pipe clamps 23 are provided at the front part of the fixing frame 16 at intervals left and right, and each second pipe clamp 23 can be detachably and fixedly installed on the outer side of the pipeline 1.

[0046] According to requirements, the first pipe clamp 8 is a well-known existing technology, such as a U-shaped pipe clamp, a hoop, or a U-shaped bolt. Two second pipe clamps 23 are provided at the front part of the fixing frame 16 at intervals left and right. The second pipe clamp 23 on the right can be detachably and fixedly installed on the outer side of the pipeline 1 or on the outer side of the valve body of the ball valve 2. The second pipe clamp 23 on the right can be set according to the installation space. At the front and rear parts of the first pipe clamp 8, there are connectors with the upper ends screwed to the lower side of the fixing frame 16 and fixedly installed together with the fixing frame 16. The connectors can be well-known existing connecting bolts. There are holes on the lower side of the fixing frame 16 that match the connecting bolts 22. The connectors can also be well-known existing self-tapping screws. Use an electric wrench to screw the upper end of the self-tapping screw inside the lower part of the fixing frame 16. During use, through such a setting, it is convenient to disassemble and assemble the fixing frame 16, reduce the disassembly and assembly difficulty and cost, and can improve the promotion performance.

[0047] Embodiment Eight: As an optimization of the above embodiment, as shown in the attached Figure 11 、 12 figure, a guide wheel 24 is rotatably installed on the outer side of the guide rod 17. An outward-opening guide groove 25 is provided on the outer side of the middle part of the guide wheel 24, and the left part of the connecting rope 19 is wound in the guide groove 25.

[0048] According to requirements, the guiding groove 25 can be arc-shaped or rectangular with an opening facing outwards. A limiting nut is screwed on the outer side of the guiding rod 17 corresponding to the upper end position of the guiding wheel 24. During use, with such a setting, it can be avoided that during the retraction process of the elastic resetting member 20, the connecting rope 19 and the guiding rod 17 are separated from each other, causing the elastic resetting member 20 and the connecting rope 19 to be parallel to the handle 4 of the ball valve 2 and unable to rotate the handle 4 of the ball valve 2, resulting in the failure of closing the ball valve 2. It can also reduce the difficulty of closing the handle 4 of the ball valve 2. During the contraction process of the elastic resetting member 20, it can quickly rotate the handle 4 of the ball valve 2 through the connecting rope 19, so as to quickly close the ball valve 2 and avoid more serious water leakage.

[0049] The above technical features respectively constitute the embodiments of the present invention, which have strong adaptability and implementation effects. Non-essential technical features can be increased or decreased according to actual needs to meet the requirements of different situations.

Claims

1. A cheap automatic closing device applicable to a water supply ball valve, used for closing the ball valve on a pipeline, characterized in that It includes a fixing bracket, a detector, a limiting rod and a closing component. The fixing bracket is detachably and fixedly installed on the outer side of the pipeline. A limiting rod is provided on the fixing bracket, and a closing component is installed between the limiting rod and the ball valve. After the detector detects the liquid, the limiting rod is actuated, and at the same time, the closing component rotates the handle of the ball valve by a certain angle to close the ball valve.

2. The inexpensive automatic closing device applicable to a water supply ball valve according to claim 1, characterized in that The fixing bracket includes a fixing rod and a first pipe clamp. A fixing rod is provided on the front side of the pipeline corresponding to the right end position of the handle of the ball valve. The lower part of the fixing rod is detachably and fixedly installed with the pipeline through the first pipe clamp. A fixing plate located above the handle of the ball valve is fixedly installed at the rear side of the upper end of the fixing rod. A first positioning hole penetrating up and down is provided on the upper side of the rear part of the fixing plate. A limiting rod with its upper part inserted into the first positioning hole is provided on the right part of the handle of the ball valve. After the detector detects the liquid, the limiting rod can axially move and separate from the fixing plate. The closing component includes a volute spring sleeved outside the gland of the ball valve. The inner end of the volute spring is clamped outside the valve body of the ball valve. The outer end of the volute spring extends to the right and abuts against the front side of the right end of the handle of the ball valve. After the limiting rod separates from the fixing plate, the volute spring rotates the handle of the ball valve by a certain angle to close the ball valve.

3. The inexpensive automatic closing device applicable to a water supply ball valve according to claim 2, characterized in that The detector includes a first power supply module, a mounting sleeve, an electromagnet and a first liquid leakage switch. A mounting sleeve is fixedly installed at the right end of the handle of the ball valve. An electromagnet is fixedly installed inside the mounting sleeve. The upper end of the iron core of the electromagnet is detachably and fixedly installed with the lower end of the limiting rod. The coil of the electromagnet and the first liquid leakage switch are both connected to the first power supply module; Alternatively, a mounting sleeve is fixedly installed at the right end of the handle of the ball valve. An electromagnet is fixedly installed inside the mounting sleeve. The upper end of the iron core of the electromagnet is detachably and fixedly installed with the lower end of the limiting rod. The coil of the electromagnet and the first liquid leakage switch are both connected to the first power supply module.

4. The inexpensive automatic closing device applicable to a water supply ball valve according to claim 1, characterized in that The fixing bracket includes a fixing frame. A fixing frame is fixedly installed on the outer side of the pipeline corresponding to the left side of the ball valve. The fixing frame is in a U shape with an opening facing backward. A guide rod is fixedly installed on the upper side of the left part of the fixing frame. The limiting rod is a hot melt wire with its right end fixedly installed with the fixing frame. The closing component includes a guide rod, a connecting rope and an elastic resetting member capable of extending and retracting. The left part of the elastic resetting member is installed with the left part of the fixing frame. The right part of the elastic resetting member is extended and installed with the left end of the hot melt wire. The right part of the handle of the ball valve is fixedly connected to the first end of the connecting rope. The second end of the connecting rope bypasses the guide rod and is connected to the right part of the elastic resetting member. After the detector detects the liquid, the hot melt wire can be broken. After the hot melt wire is broken, the elastic resetting member retracts and rotates the handle of the ball valve by a certain angle through the connecting rope to close the ball valve.

5. The inexpensive automatic closing device applicable to a water supply ball valve according to claim 4, characterized in that The detector includes a second power supply module and a first liquid leakage switch. The hot melt wire and the second liquid leakage switch are both connected to the second power supply module.

6. The inexpensive automatic closing device applicable to a water supply ball valve according to claim 4 or 5, characterized in that At least two second pipe clamps are provided at intervals left and right on the front part of the fixing frame. Each second pipe clamp can be detachably and fixedly installed on the outer side of the pipeline.

7. The inexpensive automatic closing device applicable to a water supply ball valve according to claim 4 or 5, characterized in that A guide wheel is rotatably installed on the outer side of the guide rod. A guide groove with an opening facing outward is provided on the outer side of the middle part of the guide wheel. The left part of the connecting rope is wound in the guide groove.

8. The inexpensive automatic closing device applicable to a water supply ball valve according to claim 6, characterized in that A guide wheel is rotatably installed on the outer side of the guide rod. A guide groove with an opening facing outward is provided on the outer side of the middle part of the guide wheel. The left part of the connecting rope is wound in the guide groove.

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