A multi-passage check valve

Abstract

The present application relates to the technical field of check valve, and discloses a multi-pipeline check valve, which comprises a valve body, the surface of the valve body is provided with a through port, the inside of the valve body is provided with a water inlet channel, a check channel and a water outlet channel, the water inlet channel and the water outlet channel are communicated with the check channel, the inside of the check channel is provided with a check assembly for unidirectional flow limiting, the inside of the valve body is provided with a water storage cavity, one end of the water storage cavity is communicated with the check channel through a connecting port, and the other end of the water storage cavity is communicated with the check channel through a water injection channel.The check valve can make the first spring change from a high compression state to a moderate extension state when the valve is working, avoid the spring being continuously compressed for a long time, reduce the problems of elastic fatigue, spring force attenuation and reset failure, and prolong the service life of the spring and the valve as a whole.

Description

Technical Field

[0001] This invention relates to the field of check valve technology, and more particularly to a multi-line check valve. Background Technology

[0002] Multi-channel check valves are valve devices that integrate multiple flow channels into one unit. They can connect to multiple delivery pipelines simultaneously. Relying on the one-way opening and closing structure inside the valve body, they control the flow direction of the medium, allowing only one-way flow of the medium and automatically blocking the backflow of the medium. They are mainly used in multi-channel parallel delivery systems to prevent backflow, stabilize pressure, and protect pipelines and downstream equipment.

[0003] Conventional built-in spring-loaded check valves rely on water pressure to compress the valve core and spring to achieve unidirectional flow of the medium. During long-term forward transport of the medium, the spring will be in a state of continuous compression deformation. Metal springs subjected to constant loads for a long time are prone to elastic decay and fatigue relaxation, causing the original spring force to gradually decrease. When the water flow is interrupted and the medium shows a backflow tendency, the spring with insufficient spring force cannot drive the valve core to accurately return to the sealing position. Incomplete valve core closure will cause medium backflow, leading to unstable pipeline system pressure. At the same time, incomplete valve core return will also prevent the sealing surface from fully fitting. Continuous medium leakage will not only reduce pipeline transport efficiency, but impurities can also easily enter the valve body from the sealing gap, further jamming the valve core and spring structure, aggravating component wear and actuation jamming problems, forming a vicious cycle.

[0004] Therefore, a multi-pipe check valve needs to be designed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-pipe check valve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A multi-pipe check valve includes a valve body with an opening on its surface. The valve body has an inlet channel, a check channel, and an outlet channel inside. Both the inlet and outlet channels are connected to the check channel. A check component is installed inside the check channel for unidirectional flow restriction. A water storage chamber is located inside the valve body. One end of the water storage chamber is connected to the check channel via a connection port, and the other end of the water storage chamber is connected to the check channel via a water injection channel. The check valve assembly includes a valve stem and a first spring. The valve stem is slidably disposed inside the check valve channel. The first spring is disposed inside the check valve channel. The elastic force of the first spring acts on the valve stem. A valve core is fixed to the end of the valve stem, and the valve core is positioned facing the water inlet channel. The valve stem is equipped with a pressure relief assembly, the water storage chamber is equipped with a load release assembly, and the valve body is equipped with a reset assembly.

[0007] As a preferred embodiment of the present invention, the pressure relief assembly includes a recess and an opening. The recess is located at the end of the valve stem away from the valve core, and the opening is located on the surface of the valve stem and communicates with the recess. A movable block is provided inside the recess, and the movable block is connected to a first spring. A limit ring is fixed inside the recess. A through-hole is provided on the movable block, and a movable rod is slidably disposed in the through-hole. A fixing block is fixed at the end of the movable rod, and the fixing block has a hemispherical structure. The movable rod and the movable block are connected by a second spring.

[0008] As a preferred embodiment of the present invention, the load release assembly includes a movable block, a second magnetic block, and a movable plate. The movable block is slidably disposed inside the water storage chamber. A first magnetic block is embedded at one end of the movable block. The second magnetic block is fixed to the inner wall of the water storage chamber and is positioned opposite to the first magnetic block. The magnetic poles of the first and second magnetic blocks are opposite poles. The movable plate is slidably disposed inside the water storage chamber and has an inclined surface. A top rod is fixed at the end of the movable block away from the first magnetic block and is positioned opposite to the inclined surface of the movable plate. The load release assembly also includes a limiting rib fixed inside the water storage chamber. A top pin is fixed to the side of the movable plate and is positioned opposite to the connection port. An clearance opening is provided on the second magnetic block.

[0009] As a preferred embodiment of the present invention, the side of the movable plate is fitted with the inner wall of the water storage cavity, and the side of the movable plate is also fitted with the limiting rib.

[0010] As a preferred embodiment of the present invention, the surface of the movable block is in contact with the inner wall of the water storage chamber.

[0011] As a preferred embodiment of the present invention, the reset assembly includes a sealing cavity, a first flexible bladder, and a second flexible bladder. The sealing cavity is located inside the valve body and communicates with the water storage cavity. The first flexible bladder is arranged inside the sealing cavity. One end of the second flexible bladder is connected to the wall of the settling tank, and the other end of the second flexible bladder is connected to a movable block. The first flexible bladder and the second flexible bladder are connected by a connecting pipe. A push block is slidably arranged inside the sealing cavity, and the push block is positioned directly opposite the first flexible bladder. A connecting rod is fixed to the side of the push block. The end of the connecting rod away from the push block extends into the water storage cavity and is connected to the first magnetic block. The connecting rod passes through an avoidance opening.

[0012] As a preferred embodiment of the present invention, the connecting pipe passes through the opening.

[0013] As a preferred embodiment of the present invention, both the first flexible capsule and the second flexible capsule are filled with a medium, which is a liquid or a gas.

[0014] In a preferred embodiment of the present invention, the connecting rod does not contact the second magnetic block.

[0015] As a preferred embodiment of the present invention, a first magnetic ring is fixed inside the check channel, and a second magnetic ring is fixedly sleeved on the valve stem, with the first magnetic ring and the second magnetic ring facing each other, and the magnetic poles of the first magnetic ring and the second magnetic ring being opposite poles.

[0016] The present invention has the following beneficial effects: This multi-pipeline check valve, through the cooperation of a water storage chamber, a load release component, and a pressure relief component, allows the first spring to transition from a highly compressed state to a moderately extended state when the valve is in operation with water flow. This avoids the spring being continuously compressed for a long time, reducing problems such as elastic fatigue, elastic force attenuation, and reset failure, thus extending the service life of the spring and the valve as a whole. The reset component uses two flexible bladders to work with the connecting pipe for transmission, relying on the medium to transmit power to achieve a smooth reset of the moving block. The overall structure is suitable for multi-pipeline conveying conditions, with stable unidirectional flow limiting effect, and the overall performance and operational reliability are comprehensively improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a multi-pipe check valve proposed in this invention; Figure 2 This is a cross-sectional view of a multi-pipeline check valve proposed in this invention. Figure 3 This is a schematic diagram showing the structure when the movable rod is inserted into the connector. Figure 4 This is a schematic diagram of the structure when the top pin opens the fixing block; Figure 5 This is a schematic diagram of the structure when the moving block is in contact with the limiting ring; Figure 6 This is a schematic diagram of the valve stem and valve core after repositioning. Figure 7 This is a schematic diagram of the valve stem structure; Figure 8 for Figure 2 Enlarged view of the structure at point A; Figure 9 for Figure 4 Enlarged view of the structure at point B.

[0018] In the diagram: 1. Valve body; 11. Inlet; 2. Inlet channel; 3. Check channel; 31. First magnetic ring; 32. First spring; 4. Outlet channel; 5. Storage chamber; 51. Connection port; 52. Injection channel; 61. Valve stem; 611. Second magnetic ring; 62. Valve core; 63. Settling groove; 631. Limiting ring; 632. Opening; 641. Movable block; 642. Through port; 643. Movable rod; 644. Second spring; 645. Fixed block; 71. Moving block; 72. First magnetic block; 73. Second magnetic block; 731. Clearance port; 74. Push rod; 75. Movable plate; 76. Top pin; 77. Limiting rib; 81. Sealing chamber; 82. First flexible bladder; 83. Connecting rod; 84. Push block; 85. Second flexible bladder; 86. Connecting pipe. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figure 1-9 A multi-pipe check valve includes a valve body 1, which has several inlet ends and one outlet end. The surface of the valve body 1 has a through-hole 11. Inside the valve body 1 are an inlet channel 2, a check channel 3, and an outlet channel 4. Both the inlet channel 2 and the outlet channel 4 are connected to the check channel 3. Figure 2 As shown, each inlet is connected to inlet channel 2, and each outlet is connected to outlet channel 4, as follows. Figure 1 As shown, the inlet 11 is connected to the check channel 3. A check assembly is installed inside the check channel 3 for unidirectional flow restriction of water. The check assembly includes a valve stem 61 and a first spring 32. The valve stem 61 is slidably disposed inside the check channel 3, and the first spring 32 is arranged inside the check channel 3. The elastic force of the first spring 32 acts on the valve stem 61. A valve core 62 is fixed to the end of the valve stem 61, and the valve core 62 is positioned directly opposite the water inlet channel 2. The connection between the water inlet channel 2 and the check channel 3 forms a water inlet. In the initial state, under the elastic force of the first spring 32, the valve core 62 blocks the water inlet, forming a... Figure 2 The state shown.

[0021] When water flows into the inlet channel 2, the water pressure overcomes the elastic force of the first spring 32, causing the valve stem 61 to move the valve core 62 until the valve core 62 moves away from the inlet. At this time, the water can flow through the inlet channel 2 into the check channel 3, and then flow out through the outlet channel 4. Conversely, when the water flows in the opposite direction, the water pressure cannot act on the valve stem 61, but instead causes the valve core 62 to tightly block the inlet. At this time, the water cannot flow back through the inlet channel 2, thus achieving the function of unidirectional flow restriction. It should be noted that a sealing structure is provided between the valve stem 61 and the check channel 3. This sealing structure is used to prevent the water from filling the check channel 3 and to prevent the water from leaking through the opening 11. The sealing structure can be achieved by setting a sealing ring, which is existing technology and will not be described in detail here.

[0022] A first magnetic ring 31 is fixed inside the check channel 3, and a second magnetic ring 611 is fixedly sleeved on the valve stem 61. The first magnetic ring 31 and the second magnetic ring 611 are positioned opposite each other. The magnetic poles of the first magnetic ring 31 and the second magnetic ring 611 are opposite poles. According to the principle of attraction between opposite poles, the first magnetic ring 31 has a magnetic attraction to the second magnetic ring 611, causing the second magnetic ring 611 to always tend to move closer to the first magnetic ring 31. When the valve core 62 blocks the water inlet, the first magnetic ring 31 and the second magnetic ring 611 attract each other. The magnetic attraction between them is used for the accurate reset of the valve stem 61 and the valve core 62. Figure 2 As shown, a water storage chamber 5 is provided inside the valve body 1. One end of the water storage chamber 5 is connected to the check channel 3 through a connection port 51, and the other end of the water storage chamber 5 is connected to the check channel 3 through a water injection channel 52. The water injection channel 52 has a slender L-shaped structure. Compared with the space inside the water storage chamber 5, the diameter of the water injection channel 52 is very small, so that the water can only flow in and out slowly.

[0023] A pressure relief assembly is provided on the valve stem 61. The pressure relief assembly includes a groove 63 and an opening 632. The groove 63 is located at the end of the valve stem 61 away from the valve core 62. The opening 632 is located on the surface of the valve stem 61 and communicates with the groove 63. A movable block 641 is provided inside the groove 63. The surface of the movable block 641 is in contact with the inner wall of the groove 63 to prevent the movable block 641 from shaking and to ensure the stability of the movable block 641 during movement. The movable block 641 is connected to the first spring 32. A limit ring 63 is fixed inside the groove 63. 1. The limiting ring 631 provides a limit for the movable block 641. When the movable block 641 moves to the position that contacts the limiting ring 631, the movable block 641 cannot continue to move. The movable block 641 has a through-hole 642. A movable rod 643 is slidably arranged in the through-hole 642. A fixing block 645 is fixed at the end of the movable rod 643. The fixing block 645 has a hemispherical structure. The movable rod 643 and the movable block 641 are connected by a second spring 644. Under the elastic force of the second spring 644, the movable rod 643 has a tendency to extend out of the through-hole 642.

[0024] In the initial state, such as Figure 2 As shown, the end of the movable rod 643 extends into the opening 632. At this time, the fixed block 645 is completely located in the opening 632 and abuts against the inner wall of the check channel 3. The end of the movable rod 643 is located in the opening 632. In this case, the movable block 641 and the valve stem 61 are connected through the movable rod 643. The elastic force of the first spring 32 applied to the movable block 641 can be transferred to the valve stem 61 through the movable rod 643. When the valve stem 61 moves, the valve stem 61 can drive the movable block 641 to move through the movable rod 643.

[0025] The water storage chamber 5 is equipped with a load release assembly, which includes a movable block 71, a second magnetic block 73, and a movable plate 75. The movable block 71 is slidably disposed inside the water storage chamber 5, with its surface in contact with the inner wall of the water storage chamber 5. A first magnetic block 72 is embedded at one end of the movable block 71, and the second magnetic block 73 is fixed to the inner wall of the water storage chamber 5, with the second magnetic block 73 facing the first magnetic block 72. The magnetic poles of the first magnetic block 72 and the second magnetic block 73 are opposite poles. According to the principle of opposite poles attracting each other, the movable block 71 always tends to move closer to the second magnetic block 73. In the initial state, the first magnetic block 72 is attracted to the second magnetic block 73, forming a... Figure 3 In the state shown, it should be noted that the movable block 71 will not block the water inlet channel 2. The movable plate 75 is slidably disposed inside the water storage chamber 5. The movable plate 75 is provided with an inclined surface. The end of the movable block 71 away from the first magnetic block 72 is fixed with a top rod 74, and the top rod 74 is set directly opposite the inclined surface of the movable plate 75. The inside of the water storage chamber 5 is fixed with a limiting rib 77. The side of the movable plate 75 is in contact with the inner wall of the water storage chamber 5, and the side of the movable plate 75 is also in contact with the limiting rib 77. The limiting rib 77 provides a limit for the movable plate 75, so that the movable plate 75 can only move in a straight line. The side of the movable plate 75 is fixed with a top pin 76, and the top pin 76 is set directly opposite the connection port 51. In the initial state, the end of the top pin 76 is located inside the connection port 51.

[0026] When water flows into the valve body 1 through the inlet channel 2, the water pushes the valve stem 61, causing the valve stem 61 to move the movable block 641. Simultaneously, the first spring 32 is compressed. As the valve stem 61 moves, its opening 632 moves accordingly. The connection port 51 is located on the movement path of the opening 632. Therefore, before the valve stem 61 reaches its limit position, the opening 632 can move to a position directly opposite the connection port 51. When they are directly opposite, the movable rod 643 extends under the action of the second spring 644 and engages with the connection port 51. This allows the fixed block 645 to insert into the connection port 51, forming a... Figure 3The state shown should be explained as follows: In this state, the fixed block 645 is completely located in the connection port 51, and the end of the movable rod 643 is also located in the connection port 51. At the same time, the fixed block 645 is in contact with the top pin 76. At this time, the movable rod 643 plays a positioning role for the valve stem 61, causing the valve stem 61 to stop moving. In addition, when the water flows into the check channel 3, the presence of water pressure allows the water to flow through the water injection channel 52 into the water storage chamber 5. Since the diameter of the water injection channel 52 is small, the water injection speed is slow. After the valve stem 61 moves to the set position, the water gradually flows into the water storage chamber 5. During this process, the water pressure can overcome the magnetic force between the first magnetic block 72 and the second magnetic block 73, causing the movable block 71 to move away from the second magnetic block 73.

[0027] like Figure 4 and Figure 9 As shown, during the movement of the movable block 71, the top rod 74 pushes the inclined surface of the movable plate 75. Under the guidance of the inclined surface, the movable plate 75 can move, which in turn drives the top pin 76 to move, causing the top pin 76 to push the fixed block 645 out of the connection port 51. When the movable plate 75 moves to the limit position (i.e., when the movable block 71 contacts the limiting rib 77), the arc surface of the fixed block 645 is located in the opening 632, and the end of the movable rod 643 is located inside the through port 642. Because the fixed block 645 has a hemispherical structure, the elastic force applied by the first spring 32 to the movable block 641 causes the fixed block 645 to be squeezed against the opening 632. This squeezing action causes the fixed block 645 to retract into the through-hole 642 and become misaligned with it. Lacking the constraint of the fixed block 645 and the movable rod 643, the movable block 641 will move towards the limiting ring 631 under the action of the first spring 32 until the movable block 641 abuts against the limiting ring 631, forming a... Figure 5 As shown in the diagram, the first spring 32 will extend during this process. Compared with traditional check valves, this design can prevent the first spring 32 from being in a highly compressed state for a long time, reduce the elastic fatigue, elastic force attenuation and reset failure caused by continuous pressure, ensure the performance of the spring and the reliability of opening and closing action, and extend the service life of the overall valve.

[0028] It is worth noting that when the movable block 641 moves to the position where it contacts the limiting ring 631, the first spring 32 can extend. However, the extended first spring 32 is still in a compressed state. This allows the valve stem 61 to still perform a reset action under the action of the first spring 32 after unloading. It should be noted that the remaining elastic force of the first spring 32 is still sufficient to overcome the medium resistance and the friction between the components, so that the valve stem 61 can be reset smoothly. In addition, during the process of the movable block 641 releasing the load, the position of the valve stem 61 will not change because the valve stem 61 cannot move due to the water pressure.

[0029] A reset assembly is provided inside the valve body 1 for resetting the movable block 641. The reset assembly includes a sealing cavity 81, a first flexible bladder 82, and a second flexible bladder 85. The sealing cavity 81 is located inside the valve body 1 and communicates with the water storage cavity 5. The first flexible bladder 82 is arranged inside the sealing cavity 81. One end of the second flexible bladder 85 is connected to the wall of the settling tank 63, and the other end of the second flexible bladder 85 is connected to the movable block 641. The first flexible bladder 82 and the second flexible bladder 85 are connected by a connecting pipe 86. Figure 1 As shown, the connecting pipe 86 is located in the port 11. The connecting pipe 86 is a flexible tube that can move and deform with the valve stem 61. In addition, the port 11 has a strip-shaped structure to provide space for the movement of the connecting pipe 86. A push block 84 is slidably arranged inside the sealing cavity 81, and the push block 84 is positioned directly opposite the first flexible bladder 82. A connecting rod 83 is fixed to the side of the push block 84. The end of the connecting rod 83 away from the push block 84 extends into the interior of the water storage cavity 5 and is connected to the first magnetic block 72. The second magnetic block 73 has a relief opening 731 adapted to the connecting pipe. The connecting rod 83 passes through the relief opening 731 and does not contact the second magnetic block 73 to avoid wear and jamming.

[0030] When the water flow stops entering the inlet channel 2, the water pressure no longer acts on the valve core 62 and valve stem 61. At this time, the valve stem 61 returns to its original position under the action of the first spring 32. When the valve stem 61 approaches its initial position, the first magnetic ring 31 and the second magnetic ring 611 approach each other and are attracted by magnetic attraction, which assists in the reset of the valve stem 61, forming a... Figure 6As shown, during the filling stage, water flows into the water storage chamber 5, causing the moving block 71 to move. When the moving block 71 moves, it can move the pushing block 84 via the connecting rod 83, moving the pushing block 84 away from the first flexible bladder 82. This gives the first flexible bladder 82 room to expand. Therefore, as the moving block 641 approaches the limiting ring 631, it will squeeze the second flexible bladder 85. When the second flexible bladder 85 is squeezed, its internal medium (which can be liquid or gas) will enter the first flexible bladder 82 through the connecting pipe 86, causing the first flexible bladder 82 to expand. After the water supply stops, the water pressure no longer acts on the moving block 71, causing it to slowly reset under the attraction of the first magnetic block 72 and the second magnetic block 73. During the reset process, the moving block 71 can discharge the water in the water storage chamber 5 through the water injection channel 52, ultimately allowing the water to flow out through the water outlet channel 4. Additionally, the moving block... When 71 is reset, the connecting rod 83 can drive the push block 84 to reset. When the push block 84 is reset, it can push the first flexible bladder 82, which allows the medium in the first flexible bladder 82 to re-enter the second flexible bladder 85 through the connecting pipe 86 and cause the second flexible bladder 85 to expand. When the second flexible bladder 85 expands, it can drive the movable block 641 to move away from the limiting ring 631 until the through port 642 is aligned with the opening 632. When the two are aligned, the movable block 641 automatically engages in the opening 632 under the action of the second spring 644, and finally successfully resets to the initial position. It should be noted that the connecting pipe 86 does not contact the inner wall of the through port 11, which can avoid frictional resistance during the movement of the connecting pipe 86 and ensure the smooth movement of the connecting pipe 86. Secondly, the connecting pipe 86 is arranged outside the valve body 1, so there will be no movement interference such as entanglement with the internal components of the valve body 1.

[0031] The specific working principle of this invention is as follows: When the multi-pipe check valve is working, water flows from each inlet end into the valve body 1 through the inlet channel 2. The water pressure generated by the water flow overcomes the elastic force of the first spring 32, pushing the valve stem 61 and valve core 62 to move. After the valve core 62 disengages from the inlet, the water can flow out through the inlet channel 2 and the check channel 3, finally exiting from the outlet channel 4. The sealing structure between the valve stem 61 and the check channel 3 can prevent water from overflowing and avoid leakage of the medium from the opening 11 on the surface of the valve body 1. During the forward water flow, the valve stem 61 continuously moves with the water flow. When the opening 632 on the valve stem 61 moves to a position directly opposite the connection port 51, the movable rod 643 extends under the elastic force of the second spring 644 and engages with the connection port 51. The hemispherical fixing block 645 then embeds into the connection port 51, thus positioning the valve stem 61. Simultaneously, some water flows slowly into the water storage chamber 5 through the narrow L-shaped water inlet channel 52. As the water volume in the water storage chamber 5 gradually increases, the water pressure continuously rises and overcomes the magnetic attraction between the first magnetic block 72 and the second magnetic block 73, propelling the movable rod 643. The movable block 71 slides away from the second magnetic block 73, causing the push rod 74 to move together. The push rod 74 contacts and pushes the inclined surface of the movable plate 75, and with the guidance of the inclined surface, the movable plate 75 moves linearly. The movable plate 75 drives the top pin 76 to move synchronously, pushing the fixed block 645, which is stuck in the connection port 51, outward. When the movable block 71 abuts against the limiting rib 77 and reaches its limit position, the arc surface of the fixed block 645 falls into the opening 632. The hemispherical fixed block 645 is subjected to the first... The squeezing force transmitted by the spring 32 retracts into the through-hole 642, and the movable rod 643 retracts accordingly. The constraint between the valve stem 61 and the movable block 641 is released. Under the pulling force of the first spring 32, the movable block 641 moves towards the limiting ring 631 until it fits against the limiting ring 631. The first spring 32 then extends, getting rid of the long-term high compression state. At this time, the first spring 32 still maintains a certain amount of compression to reserve elasticity for subsequent reset. During the entire unloading process, the position of the valve stem 61 under the action of water pressure remains unchanged.

[0032] When the external water supply stops, the water pressure acting on the valve core 62 and valve stem 61 disappears. Driven by the elastic force of the first spring 32, the valve stem 61 begins to reset. The second magnetic ring 611 on the valve stem 61 approaches the first magnetic ring 31 in the check channel 3 and aligns itself using opposite-polar magnetic attraction. This helps the valve core 62 re-seal the inlet, blocking backflow and achieving unidirectional flow restriction. During this period, the water in the storage chamber 5 is gradually discharged. After the moving block 71 loses water pressure, it slowly resets under the magnetic attraction of the first magnetic block 72 and the second magnetic block 73. The moving block 71 is then connected... Rod 83 drives push block 84 to move synchronously. Push block 84 squeezes the first flexible bladder 82, causing the medium inside the first flexible bladder 82 to flow into the second flexible bladder 85 through the connecting pipe 86 and expand it. The expanded second flexible bladder 85 pushes the movable block 641 away from the limiting ring 631 until the through hole 642 on the movable block 641 is re-aligned with the opening 632 on the surface of the valve stem 61. The movable rod 643 extends again under the action of the second spring 644 and engages the opening 632. The fixed block 645 returns to its position. Each component completes its reset in sequence, and the valve returns to its initial state, waiting for the next water supply operation.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-line check valve characterized by, The valve body (1) includes a valve body (1) with an opening (11) on its surface. The valve body (1) has an inlet channel (2), a check channel (3) and an outlet channel (4) inside. The inlet channel (2) and the outlet channel (4) are both connected to the check channel (3). The check channel (3) is equipped with a check component for unidirectional flow restriction of water. The valve body (1) has a water storage chamber (5) inside. One end of the water storage chamber (5) is connected to the check channel (3) through a connection port (51), and the other end of the water storage chamber (5) is connected to the check channel (3) through a water injection channel (52). The check valve assembly includes a valve stem (61) and a first spring (32). The valve stem (61) is slidably disposed inside the check valve channel (3). The first spring (32) is disposed inside the check valve channel (3). The elastic force of the first spring (32) acts on the valve stem (61). A valve core (62) is fixed at the end of the valve stem (61), and the valve core (62) is positioned facing the water inlet channel (2). A pressure release assembly is provided on the valve stem (61), a load release assembly is provided inside the water storage chamber (5), and a reset assembly is provided inside the valve body (1).

2. A multiple line check valve according to claim 1, wherein The pressure relief assembly includes a sink (63) and an opening (632). The sink (63) is located at the end of the valve stem (61) away from the valve core (62). The opening (632) is located on the surface of the valve stem (61) and communicates with the sink (63). A movable block (641) is provided inside the sink (63). The movable block (641) is connected to a first spring (32). A limit ring (631) is fixed inside the sink (63). A through-hole (642) is provided on the movable block (641). A movable rod (643) is slidably arranged in the through-hole (642). A fixing block (645) is fixed at the end of the movable rod (643). The fixing block (645) has a hemispherical structure. The movable rod (643) and the movable block (641) are connected by a second spring (644).

3. A multiple line check valve according to claim 2, wherein The load release assembly includes a movable block (71), a second magnetic block (73), and a movable plate (75). The movable block (71) is slidably disposed inside the water storage chamber (5). A first magnetic block (72) is embedded at one end of the movable block (71). The second magnetic block (73) is fixed to the inner wall of the water storage chamber (5) and is positioned opposite to the first magnetic block (72). The magnetic poles of the first magnetic block (72) and the second magnetic block (73) are opposite poles. The movable plate (75) is slidably disposed inside the water storage chamber (5). The movable plate (75) is provided with an inclined surface. The end of the movable block (71) away from the first magnetic block (72) is fixed with a top rod (74), and the top rod (74) is set directly opposite the inclined surface of the movable plate (75). The load release assembly also includes a limiting rib (77), which is fixed inside the water storage chamber (5). The side of the movable plate (75) is fixed with a top pin (76), and the top pin (76) is set directly opposite the connection port (51). The second magnetic block (73) is provided with an avoidance opening (731).

4. A multiple line check valve according to claim 3, wherein The side of the movable plate (75) is in contact with the inner wall of the water storage cavity (5), and the side of the movable plate (75) is also in contact with the limiting rib (77).

5. A multiple line check valve according to claim 3, wherein The surface of the movable block (71) is in contact with the inner wall of the water storage chamber (5).

6. A multi-line check valve according to claim 3, characterized in that, The reset assembly includes a sealing cavity (81), a first flexible bladder (82), and a second flexible bladder (85). The sealing cavity (81) is located inside the valve body (1) and is connected to the water storage cavity (5). The first flexible bladder (82) is arranged inside the sealing cavity (81). One end of the second flexible bladder (85) is connected to the wall of the sink (63), and the other end of the second flexible bladder (85) is connected to the movable block (641). The first flexible bladder (82) and the second flexible bladder (85) are connected by a connecting pipe (86). A push block (84) is slidably arranged inside the sealing cavity (81), and the push block (84) is positioned directly opposite the first flexible bladder (82). A connecting rod (83) is fixed to the side of the push block (84). The end of the connecting rod (83) away from the push block (84) extends into the water storage cavity (5) and is connected to the first magnetic block (72). The connecting rod (83) passes through the clearance opening (731).

7. A multi-line check valve according to claim 6, characterized in that, The connecting pipe (86) passes through the opening (11).

8. A multi-line check valve according to claim 6, characterized in that, Both the first flexible capsule (82) and the second flexible capsule (85) are filled with a medium, which is either liquid or gas.

9. A multi-line check valve according to claim 6, characterized in that, The connecting rod (83) does not contact the second magnetic block (73).

10. A multi-line check valve according to claim 1, characterized in that, The check channel (3) is fixed with a first magnetic ring (31) inside, and a second magnetic ring (611) is fixedly sleeved on the valve stem (61). The first magnetic ring (31) and the second magnetic ring (611) are arranged opposite to each other, and the magnetic poles of the first magnetic ring (31) and the second magnetic ring (611) are opposite poles.

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