An emergency device and control method for automatic switching of water supply pipeline in emergency

Abstract

The present invention belongs to the technical field of emergency valves, and in particular, relates to an emergency device and a control method for automatic switching of a water supply pipeline in an emergency situation. The emergency device comprises a water supply pipeline, an emergency valve and an emergency flow valve. The water supply pipeline comprises an input end and an output end. The emergency valve is installed at the input end, and is provided with a trigger mechanism and is connected to a water source. The emergency flow valve is installed at the output end, and performs low-flow transportation in an emergency situation of the water supply pipeline, and is connected to a water unit. The trigger mechanism is used to automatically trigger the emergency valve and switch it from an open state to a closed state in an emergency situation of the water supply pipeline. When a pressure loss occurs in the water supply pipeline, the input end is closed, and the output end is transported at a low flow rate, so that part of the water resources in the water supply pipeline continue to be supplied to the water use unit, thereby avoiding direct waste. At the same time, low-flow transportation is continued, which can reduce the possibility of water hammer effect, avoid further damage to the rupture, and avoid increasing the waste of water resources.

Description

Technical Field

[0001] The invention belongs to the technical field of emergency valves, and in particular relates to an emergency device and a control method for automatic switching of a water supply pipeline in an emergency situation. Background Art

[0002] Water supply pipes are used to transport water from the water source to the water-using units. In actual use, emergency situations such as rupture or bursting of water supply pipes often occur, and the traditional way of dealing with them is usually to manually close the main water valve. When dealing with inspections or maintenance, the main water valve can usually be closed in time. However, when the water supply pipes are aged or accidentally burst during construction, if the main water valve cannot be closed in time, it is easy to cause a large amount of water resources to be wasted.

[0003] For example, Chinese patent application number (CN201910895986.6) discloses an automatic circuit breaker device for leaking and losing pressure in a tap water pipe, which includes a delivery pipe, an emergency stop valve, a one-way valve and an automatic trigger device. The automatic trigger device detects the water pressure in the delivery pipe, and automatically triggers the emergency stop valve to close in a pressure-loss state, thereby avoiding a large amount of water resources being wasted due to failure to close in time; however, it is closed directly through the emergency stop valve, and the one-way valve cannot be opened in a pressure-loss state, which not only causes direct waste of water resources in the delivery pipe, but also easily produces a water hammer effect, resulting in further damage to the rupture, which needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to provide an emergency device and control method for automatic switching of water supply pipelines in emergency situations in response to the above-mentioned technical problems, so as to avoid direct waste of water resources in the transmission pipeline after the main valve is closed, and to prevent water hammer effect from occurring, thereby avoiding further damage to the ruptured part.

[0005] In view of this, the present invention provides an emergency device for automatic switching of a water supply pipeline in an emergency situation, comprising:

[0006] Water supply pipes, including input and output ends;

[0007] An emergency valve is installed at the input end of the water supply pipeline and is provided with a trigger mechanism and connected to the water source;

[0008] An emergency flow valve is installed at the output end of the pipeline and is used to deliver low flow in an emergency situation in the water supply pipeline and is connected to the water use unit;

[0009] The trigger mechanism is used to automatically trigger the emergency valve and switch it from an open state to a closed state when an emergency occurs in the water supply pipeline.

[0010] In the above technical solution, further, the emergency flow valve includes:

[0011] A first valve body connected to the output end of the water supply pipeline;

[0012] A first valve core is slidably connected to the inner wall of the first valve body, and a first spring is arranged between the first valve core and the inner wall of the first valve body;

[0013] When the position of the first valve core changes, a channel for low-flow circulation or a channel for high-flow circulation is formed in the first valve body.

[0014] In the above technical solution, further, the emergency flow valve also includes:

[0015] A bypass pipe is installed on the side of the first valve body, and the side of the first valve body is respectively provided with a bypass outlet and a bypass inlet connected with two ends of the bypass pipe;

[0016] Among them, the first valve body is provided with a first inlet connected to the water supply pipe and a first outlet connected to the water use unit, a low flow channel is provided in the first valve core, and an annular groove is provided on the surface, and the annular groove and the bypass outlet, bypass inlet and bypass pipe form a high flow channel.

[0017] In the above technical solution, further, the emergency valve includes:

[0018] A second valve body connected to an input end of the water supply pipeline;

[0019] A second valve core is installed in the second valve body and is used to switch the input end of the water supply pipeline on and off;

[0020] The trigger mechanism includes a detection component for detecting a pressure loss state and a drive component for driving the second valve core to rotate.

[0021] In the above technical solution, further, the driving component includes:

[0022] The gear is sleeved on the second valve core, and a ratchet wheel is arranged between the gear and the second valve core;

[0023] A rack is slidably connected to the second valve body and meshes with the gear;

[0024] A piston structure is installed on the second valve body and is used to drive the rack to slide;

[0025] Among them, after the piston structure drives the rack to slide in one direction, the gear rotates 90°.

[0026] In the above technical solution, further, the ratchet member includes:

[0027] The bracket is sleeved on the second valve core, and has a plurality of ratchets arranged at equal intervals around the circumference, and a torsion spring is arranged at the connection;

[0028] Among them, a plurality of ratchet teeth cooperating with the pawls are arranged on the inner wall of the gear close to the axis.

[0029] In the above technical solution, further, the piston structure includes:

[0030] The piston cylinder is mounted on the side of the second valve body and has a circular hole and a liquid inlet respectively axially opened at both ends;

[0031] A piston head is slidably connected in the piston cylinder;

[0032] The piston rod has one end connected to the rack and the other end connected to the piston head through a circular hole and is arranged parallel to the rack;

[0033] There are two piston structures, which are arranged opposite to each other and are used to push the rack to drive the gear to rotate and push the rack to reset.

[0034] In the above technical solution, further, the detection component includes:

[0035] The first sub-pipeline has two ends respectively connected to the liquid inlet of the piston cylinder used to push the rack to reset and the side of the first valve body located at the first outlet;

[0036] The second sub-pipeline has two ends respectively connected to the liquid inlet of the piston cylinder used to push the rack to drive the gear to rotate and the side of the water supply pipeline located at the input end;

[0037] The third valve body is installed on the first sub-pipeline and is located on a side close to the first valve body, and is provided with a first ball for blocking the third valve body and a second spring installed on a side of the first ball away from the first valve body;

[0038] A venturi tube is installed on the second sub-pipeline, a solenoid valve is provided between the venturi tube and the piston cylinder, and a trigger switch for triggering the solenoid valve is installed in the first valve body;

[0039] A branch pipeline, one end of which is connected to the first sub-pipeline via a three-way joint, and the other end of which is connected to the venturi tube;

[0040] The fourth valve body is installed at one end of the branch pipeline close to the three-way joint, and is provided with a second ball for blocking the fourth valve body and a third spring installed on the side of the second ball away from the three-way joint;

[0041] The pressure relief valve is installed on the side of the piston cylinder used to push the rack to drive the gear to rotate.

[0042] In the above technical solution, further, the trigger switch includes:

[0043] A first electrode is installed in the first valve body and is located at the first spring, and is provided with a first trigger point at one end away from the inner wall of the first valve body;

[0044] A second electrode is connected to one end of the first valve core close to the first spring and is slidably connected to the first electrode, and is provided with a second trigger point at one end away from the first valve core;

[0045] When the first spring is reset, the first trigger point is electrically connected to the second trigger point, and triggers the solenoid valve to open.

[0046] The present invention provides a control method for an emergency device for automatic switching of a water supply pipeline in an emergency situation, comprising the following steps:

[0047] S1: When an emergency such as a rupture or burst in the water supply pipeline causes a significant drop in water pressure in the water supply pipeline, the first valve core switches the high-flow flow to a low-flow flow;

[0048] S2: The pressure at the first outlet is insufficient to push open the first sphere, and water no longer flows into the first sub-pipeline;

[0049] S3: the second electrode contacts the first electrode and triggers the solenoid valve to open the second sub-pipeline;

[0050] S4: The water flow at the input end passes through the venturi tube, the solenoid valve and the liquid inlet in sequence and enters the piston cylinder used to push the rack to drive the gear to rotate;

[0051] S5: The first sub-pipeline is closed, the water volume remains unchanged, and the space is gradually compressed, the water pressure increases, thereby pushing open the second sphere, and pushing the rack to drive the gear and the second valve core to rotate slowly, so that the emergency valve is closed;

[0052] S6: After the emergency situation is handled, the emergency valve is manually opened, and the pressure relief valve at the piston cylinder used to push the rack to drive the gear to rotate is opened, the water pressure in the water supply pipeline is restored, and the water pressure at the emergency flow valve increases, and the first valve core is pushed to compress the first spring to disconnect the trigger switch and close the solenoid valve;

[0053] S7: After the water pressure at the first outlet is restored, the first sphere is pushed open, and water flows into the first sub-pipeline. The water pressure in the second sub-pipeline is stable, and the second sphere is abutted to close the branch pipeline. The water flows into the piston cylinder used to push the rack to reset, and pushes the rack to reset, and the second valve core does not rotate.

[0054] The beneficial effects of the present invention are:

[0055] 1. By setting an emergency valve at the input end of the water supply pipeline and an emergency flow valve at the output end, when the water supply pipeline loses pressure, the input end of the water supply pipeline is closed and the output end is transported at a low flow rate, that is, part of the water resources in the water supply pipeline continue to be supplied to the water-using unit to avoid direct waste. At the same time, continued low-flow transportation can reduce the possibility of water hammer effect, avoid further damage to the rupture, and avoid increasing the waste of water resources.

[0056] 2. By opening a low-flow channel in the first valve core, when the first valve core is under the action of the first spring, in response to a pressure loss state, the first valve body can be closed, and after closing, the water flow can continue to be transported through the low-flow channel on the first valve core. The structure is simple and the flow rate is automatically reduced according to the reduction in water pressure.

[0057] 3. The piston structure pushes the rack to drive the gear to rotate, and then drives the second valve core to rotate, automatically closing the input end of the water supply pipe to avoid a large amount of water waste. At the same time, the ratchet is used for connection, so that when the rack is reset, the second valve core will not be driven to rotate, and the second valve core can only be opened manually after it is closed, avoiding opening when the water supply pipe is not repaired, thereby improving controllability.

[0058] 4. The rack is automatically reset by the water pressure in the output end of the water supply pipe, which is convenient for checking whether the water supply pipe has returned to normal. After returning to normal, the driving assembly of the emergency valve can be reset in time to ensure the water supply safety of the water supply pipe and avoid further damage and waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a schematic diagram of the structure of the present invention;

[0060] Figure 2 is a side view of the present invention;

[0061] Figure 3 The present invention Figure 2 Sectional view at AA in the middle;

[0062] Figure 4 The present invention Figure 3 The enlarged view of point B in the middle;

[0063] Figure 5 The present invention Figure 2 Sectional view at CC;

[0064] Figure 6 The present invention Figure 5 The enlarged view of point D in the middle;

[0065] Figure 7 The present invention Figure 5 Sectional view at EE;

[0066] Figure 8 The present invention Figure 7 The enlarged view of F in the middle;

[0067] Fig. 9 It is a schematic diagram of the exploded structure of the drive assembly of the present invention;

[0068] Fig.10This is a simplified structural diagram of the rack in the reset state of the present invention;

[0069] Fig.11 This is a simplified structural diagram of the rack driving the gear of the present invention rotating 90°;

[0070] The markings in the figure are as follows: 1. water supply pipeline; 100. input end; 101. output end; 2. emergency valve; 20. second valve body; 21. second valve core; 3. trigger mechanism; 4. emergency flow valve; 40. first valve body; 41. first valve core; 42. first spring; 43. bypass pipe; 44. bypass outlet; 45. bypass inlet; 46. first inlet; 47. first outlet; 48. low flow channel; 49. annular groove; 5. detection component; 500. first sub-pipeline; 501. second sub-pipeline; 502. third valve body; 503. first sphere; 504. second spring; 505. Venturi Tube; 506, solenoid valve; 507, trigger switch; 5070, first electrode; 5071, first trigger point; 5072, second electrode; 5073, second trigger point; 508, branch pipeline; 509, three-way connector; 510, fourth valve body; 511, second sphere; 512, third spring; 513, pressure relief valve; 6, drive assembly; 60, gear; 61, ratchet; 610, bracket; 611, pawl; 612, ratchet; 62, rack; 63, piston structure; 630, piston cylinder; 631, round hole; 632, liquid inlet; 633, piston head; 634, piston rod. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0072] Embodiment 1:

[0073] This embodiment provides an emergency device for automatically switching a water supply pipeline 1 in an emergency, comprising:

[0074] A water supply pipeline 1, comprising an input end 100 and an output end 101;

[0075] The emergency valve 2 is installed at the input end 100 of the water supply pipe 1 and is provided with a trigger mechanism 3 and connected to the water source;

[0076] The emergency flow valve 4 is installed at the output end 101 of the pipeline and performs low flow delivery in an emergency situation of the water supply pipeline 1 and is connected to the water use unit;

[0077] The trigger mechanism 3 is used to automatically trigger the emergency valve 2 and switch it from an open state to a closed state when the water supply pipeline 1 is in an emergency.

[0078] It can be seen from the present embodiment that by setting the emergency valve 2 at the input end 100 of the water supply pipe 1 and the emergency flow valve 4 at the output end 101, when the water supply pipe 1 loses pressure, the input end 100 of the water supply pipe 1 is closed and the output end 101 is transported at a low flow rate, that is, part of the water resources in the water supply pipe 1 continues to be supplied to the water-using unit to avoid direct waste. At the same time, continued low-flow transportation can reduce the possibility of water hammer effect, avoid further damage to the rupture, and avoid increased waste of water resources.

[0079] Embodiment 2:

[0080] This embodiment provides an emergency device for automatically switching a water supply pipeline 1 in an emergency situation. In addition to the technical solutions of the above embodiments, it also has the following technical features. The emergency flow valve 4 includes:

[0081] The first valve body 40 is connected to the output end 101 of the water supply pipe 1;

[0082] A first valve core 41 is slidably connected in the first valve body 40 , and a first spring 42 is disposed between the first valve core 41 and the inner wall of the first valve body 40 ;

[0083] When the position of the first valve core 41 changes, a channel for low flow circulation or a channel for high flow circulation is formed in the first valve body 40;

[0084] At the same time, a clearance fit is adopted between the surface of the first valve core 41 and the inner wall of the first valve body 40 to ensure that the first valve core 41 can slide while ensuring the stability of the sliding of the first valve core 41. There is no need to seal between the surface of the first valve core 41 and the inner wall of the first valve body 40, which can reduce manufacturing costs and improve assembly convenience.

[0085] It can be seen from the present embodiment that the low flow channel 48 and the high flow channel are switched by changing the position of the first valve core 41 after sliding, so that the position of the first valve core 41 can be adjusted by the water pressure, thereby controlling whether the first valve body 40 is in low flow or high flow, thereby ensuring automatic control and the effect of detecting the water pressure.

[0086] Embodiment 3:

[0087] This embodiment provides an emergency device for automatic switching of a water supply pipeline 1 in an emergency situation. In addition to the technical solutions of the above embodiments, it also has the following technical features. The emergency flow valve 4 also includes:

[0088] The bypass pipe 43 is installed on the side of the first valve body 40, and the side of the first valve body 40 is respectively provided with a bypass outlet 44 and a bypass inlet 45 which are connected with both ends of the bypass pipe 43;

[0089] Among them, the first valve body 40 is provided with a first inlet 46 connected to the water supply pipe 1 and a first outlet 47 connected to the water use unit, a low flow channel 48 is provided in the first valve core 41, and an annular groove 49 is provided on the surface, and the annular groove 49 and the bypass outlet 44, the bypass inlet 45 and the bypass pipe 43 form a high flow channel.

[0090] It can be seen from this embodiment that by opening a low-flow channel 48 in the first valve core 41, when the first valve core 41 is under the action of the first spring 42, it can close the first valve body 40 in response to the pressure loss state, and after closing, the water flow can continue to be transported through the low-flow channel 48 on the first valve core 41, and the structure is simple. According to the reduction of water pressure, the flow rate is automatically reduced, and a high-flow channel is formed through the bypass pipe 43, the bypass outlet 44 and the bypass inlet 45, and the structure is simple;

[0091] The first valve core 41 can be slid to adjust the switching between low flow and high flow, and it is sensitive to reaction. It can adjust the flow in real time according to the water pressure and the spring potential energy difference, and can buffer the water flow when the water supply pipe 1 is just opened, so as to avoid large water flow directly impacting the water use unit and improve safety.

[0092] Embodiment 4:

[0093] This embodiment provides an emergency device for automatically switching a water supply pipeline 1 in an emergency. In addition to the technical solutions of the above embodiments, it also has the following technical features. The emergency valve 2 includes:

[0094] The second valve body 20 is connected to the input end 100 of the water supply pipe 1;

[0095] The second valve core 21 is installed in the second valve body 20 and is used to switch the input end 100 of the water supply pipeline 1 on and off;

[0096] The trigger mechanism 3 includes a detection component 5 for detecting a pressure loss state and a drive component 6 for driving the second valve core 21 to rotate.

[0097] It can be seen from the present embodiment that the detection component 5 is used to detect whether the water supply pipe 1 is in a depressurized state. When in a depressurized state, the driving component 6 drives the second valve core 21 to rotate, cutting off the input end 100 of the water supply pipe 1 to avoid a large amount of water resource waste, and automatically detects and controls to ensure the real-time response to the depressurized state.

[0098] Embodiment 5:

[0099] This embodiment provides an emergency device for automatically switching a water supply pipeline 1 in an emergency situation. In addition to the technical solutions of the above embodiments, it also has the following technical features. The drive assembly 6 includes:

[0100] The gear 60 is sleeved on the second valve core 21, and a ratchet member 61 is arranged between the gear 60 and the second valve core 21;

[0101] The rack 62 is slidably connected to the second valve body 20 and meshes with the gear 60;

[0102] The piston structure 63 is mounted on the second valve body 20 and is used to drive the rack 62 to slide;

[0103] Among them, after the piston structure 63 drives the rack 62 to slide in one direction, the gear 60 rotates 90°;

[0104] At the same time, a handle is also provided on the second valve core 21, and a first indication corresponding to the opening and closing of the emergency valve 2 is provided on the handle, and a second indication corresponding to the first indication is provided on the surface of the second valve body 20, and four first indications and four second indications are provided for understanding whether the second valve core 21 is fully opened or fully closed, and both the first indication and the second indication can be arrow-shaped protrusions or grooves;

[0105] Furthermore, the gear 60 and the second valve body 20 may be connected by a bearing.

[0106] It can be seen from this embodiment that the gear 60 is driven to rotate by the piston structure 63 pushing the rack 62, thereby driving the second valve core 21 to rotate, and the input end 100 of the water supply pipe 1 is automatically closed to avoid a large amount of water waste. At the same time, the ratchet member 61 is used for connection, so that when the rack 62 is reset, the second valve core 21 is not driven to rotate, and the second valve core 21 can only be opened manually after being closed, so as to avoid opening when the water supply pipe 1 is not repaired, thereby improving controllability.

[0107] Four first indicators and four second indicators are provided to facilitate understanding of whether the second valve core 21 is fully opened or fully closed.

[0108] Embodiment 6:

[0109] This embodiment provides an emergency device for automatically switching a water supply pipe 1 in an emergency situation. In addition to the technical solutions of the above embodiments, it also has the following technical features. The ratchet member 61 includes:

[0110] The bracket 610 is sleeved on the second valve core 21, and has a plurality of ratchets 611 arranged at equal intervals around the circumference, and a torsion spring is arranged at the connection;

[0111] The inner wall of the gear 60 close to the axis is provided with a plurality of ratchet teeth 612 cooperating with the ratchet pawl 611;

[0112] Meanwhile, six ratchets 611 may be used, and an interference fit is adopted between the bracket 610 and the second valve core 21 .

[0113] It can be seen from the present embodiment that, through the cooperation between the pawl 611 and the ratchet 612, when the second valve core 21 needs to be closed, the engagement between the pawl 611 and the ratchet 612 can drive the gear 60 to rotate when the rack 62 moves, thereby driving the second valve core 21 to rotate for closing, and when the rack 62 needs to be reset, the pawl 611 and the ratchet 612 are not engaged, and thus the rack 62 will not drive the gear 60 to rotate, that is, will not drive the second valve core 21 to rotate, so that the second valve core 21 is opened manually to avoid opening when the water supply pipe 1 is not repaired, thereby improving controllability.

[0114] Embodiment 7:

[0115] This embodiment provides an emergency device for automatically switching a water supply pipeline 1 in an emergency situation. In addition to the technical solutions of the above embodiments, it also has the following technical features. The piston structure 63 includes:

[0116] The piston cylinder 630 is mounted on the side of the second valve body 20, and has a circular hole 631 and a liquid inlet 632 axially opened at both ends thereof;

[0117] The piston head 633 is slidably connected in the piston cylinder 630;

[0118] A piston rod 634, one end of which is connected to the rack 62, and the other end of which is connected to the piston head 633 through the circular hole 631 and is arranged parallel to the rack 62;

[0119] There are two piston structures 63 which are arranged opposite to each other and are used to push the rack 62 to drive the gear 60 to rotate and push the rack 62 to reset.

[0120] Meanwhile, the piston rod 634 and the rack 62 may be fixedly connected, specifically by a threaded connection or a clamping connection.

[0121] It can be seen from this embodiment that the piston head 633 slides in the piston cylinder 630, thereby pushing the rack 62 to move, that is, the movement of the rack 62 is converted into the movement of the two piston heads 633 in the two piston structures 63, which makes it easy to control the movement and adjustment, thereby ensuring the convenience of driving the rack 62.

[0122] Embodiment 8:

[0123] This embodiment provides an emergency device for automatically switching a water supply pipe 1 in an emergency situation. In addition to the technical solutions of the above embodiments, it also has the following technical features. The detection component 5 includes:

[0124] The first sub-pipeline 500 has two ends respectively connected to the liquid inlet 632 of the piston cylinder 630 for pushing the rack 62 to reset and the side of the first valve body 40 located at the first outlet 47;

[0125] The second sub-pipeline 501 has two ends connected to the liquid inlet 632 of the piston cylinder 630 used to push the rack 62 to drive the gear 60 to rotate and the water supply pipeline 1 located on the side of the input end 100;

[0126] The third valve body 502 is installed on the first sub-pipeline 500 and is located on a side close to the first valve body 40, and is provided with a first ball 503 for blocking the third valve body 502 and a second spring 504 installed on a side of the first ball 503 away from the first valve body 40;

[0127] A venturi tube 505 is installed on the second sub-pipeline 501, and a solenoid valve 506 is provided between the venturi tube 505 and the piston cylinder 630, and a trigger switch 507 for triggering the solenoid valve 506 is installed in the first valve body 40;

[0128] A branch pipeline 508, one end of which is connected to the first sub-pipeline 500 via a three-way connector 509, and the other end of which is connected to the venturi tube 505;

[0129] The fourth valve body 510 is installed at one end of the branch pipeline 508 close to the three-way joint 509, and is provided with a second ball 511 for blocking the fourth valve body 510 and a third spring 512 installed on the side of the second ball 511 away from the three-way joint 509;

[0130] The pressure relief valve 513 is installed on the side of the piston cylinder 630 which is used to push the rack 62 to drive the gear 60 to rotate.

[0131] It can be seen from the present embodiment that the third valve body 502 is used to automatically detect whether there is a pressure loss in the first sub-pipeline 500 and the first outlet 47. When the pressure is lost, the first ball 503 cannot be pushed open, so that a closed chamber is formed inside the first sub-pipeline 500 and the piston cylinder 630 connected thereto. At the same time, the low flow caused by the pressure loss causes the first valve core 41 to trigger the trigger switch 507 of the solenoid valve 506, thereby opening the second sub-pipeline 501. The water pressure from the input end 100 of the water supply pipeline 1 enters the piston cylinder 630 connected to the second sub-pipeline 501, pushing the piston head 633 to move, and compressing the first sub-pipeline 500 and the piston cylinder 630 connected thereto. The inner wall chamber of the piston cylinder 630 is used to increase the water pressure in the first sub-pipeline 500, so that it can push the second sphere 511, and the water in the first sub-pipeline 500 flows to the second sub-pipeline 501 through the branch pipeline 508 to maintain the water pressure in the first sub-pipeline 500, and the venturi tube 505 can form a high-flow water flow at the connection between the branch pipeline 508 and the venturi tube 505, thereby generating negative pressure, which can prevent the water flow from squeezing the second sphere 511 and making it difficult for the second sphere 511 to be pushed open, and can promote the water flow of the first sub-pipeline 500 to the second sub-pipeline 501, so as to facilitate the pushing of the piston cylinder 630;

[0132] At the same time, the second sub-pipeline 501 is used to inject water to push the piston cylinder 630 on one side, and the piston cylinder 630 on the other side can generate a certain resistance to the movement of the piston head 633 due to the closed space in the first sub-pipeline 500, that is, the movement speed of the piston head 633 is slowed down, and then the rotation speed of the second valve core 21 is slowed down, so that the second valve core 21 can rotate slowly, further reducing the occurrence of water hammer effect;

[0133] Furthermore, by setting the pressure relief valve 513, when the solenoid valve 506 is closed, the water flow in the piston cylinder 630 can be discharged through the pressure relief valve 513, and the water pressure is retained in the first sub-pipeline 500. When the flow at the emergency flow valve 4 is restored, the piston can be pushed quickly to ensure the rapid reset of the detection component 5.

[0134] The setting of the branch pipe 508 can also generate water pressure in the second sub-pipeline when the solenoid valve 506 is closed, and the water pressure squeezes the second ball 511 to prevent the water flow in the first sub-pipeline from entering the second sub-pipeline, thereby ensuring the stability of the rack 62 at the reset point and avoiding the movement of the rack 62 due to water pressure fluctuations in the first sub-pipeline, thereby preventing the second valve core 21 from being accidentally closed.

[0135] Embodiment 9:

[0136] This embodiment provides an emergency device for automatically switching a water supply pipe 1 in an emergency. In addition to the technical solutions of the above embodiments, it also has the following technical features. The trigger switch 507 includes:

[0137] The first electrode 5070 is installed in the first valve body 40 and is located at the first spring 42 , and a first trigger point 5071 is provided at one end away from the inner wall of the first valve body 40 ;

[0138] The second electrode 5072 is connected to one end of the first valve core 41 close to the first spring 42 and is slidably connected to the first electrode 5070 , and is provided with a second trigger point 5073 at one end away from the first valve core 41 ;

[0139] When the first spring 42 is reset, the first trigger point 5071 is electrically connected to the second trigger point 5073 and triggers the solenoid valve 506 to open;

[0140] Meanwhile, there are two first electrodes 5070 , which are respectively located on both sides of the second electrode 5072 , and the first trigger point 5071 is located on one side of the two first electrodes 5070 close to the second electrode 5072 .

[0141] It can be seen from this embodiment that the position of the first valve core 41 is changed by the pressure loss state caused in an emergency, and then the electromagnetic valve 506 can be triggered to open in the pressure loss state, so that the water pressure of the second sub-pipeline 501 pushes the piston head 633 in the piston cylinder 630 to drive the movement of the rack 62, thereby ensuring the control of the opening and closing of the second valve core 21;

[0142] Furthermore, by adopting the arrangement of two first electrodes 5070 , the second electrode 5072 is used as a switch, that is, there is no need to connect the line on the second electrode 5072 , thereby improving the convenience of installation.

[0143] Embodiment 10:

[0144] This embodiment provides an emergency device for automatically switching a water supply pipeline 1 in an emergency situation. In addition to the technical solutions of the above embodiments, the control method also has the following technical features, including the following steps:

[0145] S1: When an emergency such as a rupture or burst occurs in the water supply pipe 1 and the water pressure in the water supply pipe 1 drops significantly, the first valve core 41 switches the high flow circulation to a low flow circulation;

[0146] S2: The pressure of the first outlet 47 is insufficient to push open the first sphere 503, and water no longer flows into the first sub-pipeline 500;

[0147] S3: the second electrode 5072 contacts the first electrode 5070 and triggers the solenoid valve 506 to open the second sub-pipeline 501;

[0148] S4: The water flow at the input end 100 passes through the venturi tube 505, the solenoid valve 506 and the liquid inlet 632 in sequence and enters the piston cylinder 630 used to push the rack 62 to drive the gear 60 to rotate;

[0149] S5: The first sub-pipeline 500 is closed, the water volume remains unchanged, and the space is gradually compressed, the water pressure increases, thereby pushing open the second sphere 511, and pushing the rack 62 to drive the gear 60 and the second valve core 21 to rotate slowly, so that the emergency valve 2 is closed;

[0150] S6: After the emergency situation is handled, the emergency valve 2 is manually opened, and the pressure relief valve 513 at the piston cylinder 630 for pushing the rack 62 to drive the gear 60 to rotate is opened, the water pressure in the water supply pipe 1 is restored, and the water pressure at the emergency flow valve 4 is increased, and the first valve core 41 is pushed to compress the first spring 42 to disconnect the trigger switch 507, and close the solenoid valve 506;

[0151] S7: After the water pressure at the first outlet 47 is restored, the first sphere 503 is pushed open, and the water flows into the first sub-pipeline 500. The water pressure in the second sub-pipeline 501 is stable, and the second sphere 511 is abutted to close the branch pipeline 508. The water flows into the piston cylinder 630 used to push the rack 62 to reset, and pushes the rack 62 to reset, and the second valve core 21 does not rotate.

[0152] It can be seen from the present embodiment that only by controlling the opening and closing of the solenoid valve 506, the water pressure in the water supply pipe 1 is used as the power source to drive the movement of the piston structure 63. The second valve core 21 is opened and closed by mechanically controlling and driving. Compared with electronic control, it has the effects of simple structure, low manufacturing cost and good environmental adaptability, thereby improving reliability and ensuring safety.

[0153] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An emergency device for automatic switching of water supply pipelines in emergency situations, characterized in that: include: A water supply pipeline (1), comprising an input end (100) and an output end (101); An emergency valve (2) is installed at the input end (100) of the water supply pipeline (1), is provided with a trigger mechanism (3), and is connected to a water source; An emergency flow valve (4) is installed at the output end (101) of the pipeline and performs low flow transmission in an emergency situation of the water supply pipeline (1), and is connected to a water use unit; Wherein, the trigger mechanism (3) is used to automatically trigger the emergency valve (2) and switch it from an open state to a closed state when an emergency occurs in the water supply pipeline (1); The emergency flow valve (4) comprises: A first valve body (40) connected to an output end (101) of the water supply pipeline (1); A first valve core (41) is slidably connected in the first valve body (40), and a first spring (42) is provided between the first valve core and the inner wall of the first valve body (40); Wherein, when the position of the first valve core (41) changes, a channel for low flow circulation or a channel for high flow circulation is formed in the first valve body (40); The emergency valve (2) comprises: A second valve body (20) connected to an input end (100) of the water supply pipeline (1); A second valve core (21) is installed in the second valve body (20) and is used to switch the input end (100) of the water supply pipeline (1) open or closed; The trigger mechanism (3) comprises a detection component (5) for detecting a pressure loss state and a drive component (6) for driving the second valve core (21) to rotate; The driving component (6) comprises: The gear (60) is sleeved on the second valve core (21), and a ratchet member (61) is provided between the gear (60) and the second valve core (21); A rack (62) slidably connected to the second valve body (20) and meshing with the gear (60); A piston structure (63) is mounted on the second valve body (20) and is used to drive the rack (62) to slide; Wherein, after the piston structure (63) drives the rack (62) to slide in one direction, the gear (60) rotates 90°; The piston structure (63) comprises: The piston cylinder (630) is mounted on the side of the second valve body (20) and has a circular hole (631) and a liquid inlet (632) respectively axially opened at two ends; A piston head (633) is slidably connected in the piston cylinder (630); A piston rod (634) having one end connected to the rack (62) and the other end connected to the piston head (633) through the circular hole (631) and arranged parallel to the rack (62); There are two piston structures (63) which are arranged opposite to each other and are used to push the rack (62) to drive the gear (60) to rotate and to push the rack (62) to reset; The detection component (5) comprises: A first sub-pipeline (500) having two ends respectively connected to a liquid inlet (632) of a piston cylinder (630) for pushing the rack (62) to reset and a side surface of the first valve body (40) located at a first outlet (47); The second sub-pipeline (501) has two ends respectively connected to a liquid inlet (632) of a piston cylinder (630) used to push the rack (62) to drive the gear (60) to rotate and a side of the water supply pipeline (1) located at the input end (100); The third valve body (502) is installed on the first sub-pipeline (500) and is located on a side close to the first valve body (40), and is provided with a first ball (503) for blocking the third valve body (502) and a second spring (504) installed on a side of the first ball (503) away from the first valve body (40); A venturi tube (505) is installed on the second sub-pipeline (501), a solenoid valve (506) is provided between the venturi tube (505) and the piston cylinder (630), and a trigger switch (507) for triggering the solenoid valve (506) is installed in the first valve body (40); A branch pipeline (508), one end of which is connected to the first sub-pipeline (500) via a three-way connector (509), and the other end of which is connected to the venturi tube (505); A fourth valve body (510) is installed at one end of the branch pipeline (508) close to the three-way connector (509), and is provided with a second ball (511) for blocking the fourth valve body (510) and a third spring (512) installed on a side of the second ball (511) away from the three-way connector (509); The pressure relief valve (513) is installed on the side of the piston cylinder (630) used to push the rack (62) to drive the gear (60) to rotate.

2. The emergency device for automatic switching of water supply pipelines in emergency situations according to claim 1 is characterized in that: The emergency flow valve (4) further comprises: A bypass pipe (43) is installed on a side surface of the first valve body (40), and a bypass outlet (44) and a bypass inlet (45) are respectively provided on the side surface of the first valve body (40) and are communicated with two ends of the bypass pipe (43); The first valve body (40) is provided with a first inlet (46) connected to the water supply pipe (1) and a first outlet (47) connected to the water use unit, a low-flow channel (48) is provided inside the first valve core (41), and an annular groove (49) is provided on the surface, and the annular groove (49) forms a high-flow channel with the bypass outlet (44), the bypass inlet (45) and the bypass pipe (43).

3. The emergency device for automatic switching of water supply pipelines in emergency situations according to claim 1, characterized in that: The ratchet member (61) comprises: The bracket (610) is sleeved on the second valve core (21), and has a plurality of ratchet claws (611) arranged at equal intervals around the circumference, and a torsion spring is arranged at the connection point; Wherein, a plurality of ratchet teeth (612) cooperating with the ratchet pawls (611) are provided on the inner wall of the gear (60) close to the axis.

4. The emergency device for automatic switching of water supply pipelines in emergency situations according to claim 1, characterized in that: The trigger switch (507) comprises: A first electrode (5070) is installed in the first valve body (40) and is located at the first spring (42), and is provided with a first trigger point (5071) at an end away from the inner wall of the first valve body (40); The second electrode (5072) is connected to one end of the first valve core (41) close to the first spring (42), is slidably connected to the first electrode (5070), and is provided with a second trigger point (5073) at one end away from the first valve core (41); When the first spring (42) is reset, the first trigger point (5071) is electrically connected to the second trigger point (5073), and triggers the solenoid valve (506) to open.

5. A control method for an emergency device for automatic switching of a water supply pipeline in an emergency situation as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: S1: When an emergency such as a rupture or burst occurs in the water supply pipeline (1) causing the water pressure in the water supply pipeline (1) to drop significantly, the first valve core (41) switches the high-flow circulation to a low-flow circulation; S2: the pressure of the first outlet (47) is insufficient to push open the first sphere (503), and water no longer flows into the first sub-pipeline (500); S3: the second electrode (5072) contacts the first electrode (5070) and triggers the solenoid valve (506) to open the second sub-pipeline (501); S4: The water flow at the input end (100) passes through the venturi tube (505), the solenoid valve (506) and the liquid inlet (632) in sequence and enters the piston cylinder (630) used to push the rack (62) to drive the gear (60) to rotate; S5: the first sub-pipeline (500) is closed, the water volume remains unchanged, and the space is gradually compressed, the water pressure increases, thereby pushing open the second sphere (511), and pushing the rack (62) to drive the gear (60) and the second valve core (21) to rotate slowly, so that the emergency valve (2) is closed; S6: After the emergency situation is handled, the emergency valve (2) is manually opened, and the pressure relief valve (513) at the piston cylinder (630) for pushing the rack (62) to drive the gear (60) to rotate is opened, the water pressure in the water supply pipeline (1) is restored, and the water pressure at the emergency flow valve (4) is increased, and the first valve core (41) is pushed to compress the first spring (42) to disconnect the trigger switch (507), and close the solenoid valve (506); S7: After the water pressure at the first outlet (47) is restored, the first sphere (503) is pushed open, and water flows into the first sub-pipeline (500). The water pressure in the second sub-pipeline (501) is stable, and the second sphere (511) is abutted to close the branch pipeline (508). The water flows into the piston cylinder (630) used to push the rack (62) to reset, and pushes the rack (62) to reset, and the second valve core (21) does not rotate.

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