A one-way valve with pressure relief structure

Abstract

The application relates to the technical field of valves, in particular to a one-way valve with a pressure relief structure, which comprises a valve body, a valve core, a circular table, a plurality of supporting plates and a plurality of flow guide plates. The valve body is provided with an inner cavity, the inner cavity is provided with a first taper surface, the valve core is slidingly arranged in the inner cavity, and the valve core is provided with a second taper surface matched with the first taper surface; the circular table is rotationally arranged on the valve core, and the circular table is coaxial with the second taper surface; the plurality of flow guide plates are distributed around the circumferential direction of the circular table, each flow guide plate is connected with the circumferential surface of the circular table through a supporting plate, and each flow guide plate is parallel to the circumferential surface of the circular table at the position; the plurality of flow guide plates are divided into two groups, the distances between the two groups of flow guide plates and the circumferential surface of the circular table are different; the flow velocities of the medium in the flow channels formed between the same flow guide plate and the circular table and the second taper surface are different, the rotating circular table makes the impact degrees of the medium on the same positions of the first taper surface and the second taper surface different, and the cleaning effect of the first taper surface and the second taper surface is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a one-way valve with a pressure relief structure. Background Art

[0002] In industrial fluid control systems, check valves, as key components for ensuring unidirectional flow of media, are widely used in numerous fields, including petrochemicals, food processing, and pharmaceuticals. Their core operating principle relies on the close contact between the tapered valve core and the valve seat, and the initial seal is achieved with the preload of the first spring at the rear of the valve body, effectively blocking any reverse flow of the media.

[0003] When the medium flows in the forward direction, the one-way valve opens, and the medium impacts the conical surface of the valve core. At the same time, the impurity particles carried in the medium will inevitably adhere to the conical sealing surfaces of the valve seat and the valve core, resulting in a decrease in the flatness and smoothness of the sealing surface. During the sealing process, these hard particles will scratch and wear the sealing surface like abrasives, resulting in a decrease in the flatness and smoothness of the sealing surface, thereby significantly reducing the sealing performance of the sealing components and shortening the service life of the sealing components. Summary of the Invention

[0004] Based on this, it is necessary to provide a one-way valve with a pressure relief structure to address the problem that the sealing components of the current one-way valve are easily affected by medium impurities, thereby reducing the sealing performance and service life.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A one-way valve with a pressure relief structure comprises a valve body, a valve core, a flow guiding mechanism and a pressure relief mechanism. The valve body is provided with an inner cavity, and the valve body is provided with an inlet and an outlet communicating with the inner cavity, the inlet, the outlet and the inner cavity are arranged along a first direction, and the first direction is the flow direction of the medium; a first conical surface is provided in the inner cavity, the valve core is slidably arranged in the inner cavity along the first direction, and a second conical surface is provided on the valve core that is adapted to the first conical surface, and the axes of the first conical surface and the second conical surface both extend along the first direction; the flow guiding mechanism comprises a frustum, a plurality of support plates and a plurality of The guide plate, the large end of the cone is rotatably set on the valve core, the cone is located on the side of the valve core close to the inlet, the cone is coaxial with the second conical surface, and the circumferential surface of the cone is parallel to the second conical surface; multiple guide plates are distributed around the circumferential direction of the cone, each guide plate is connected to the circumferential surface of the cone through a support plate, the guide plate is located on the inner side of the first conical surface, and each guide plate is parallel to the circumferential surface of the cone at its position; multiple guide plates are divided into two groups, and the distances between the two groups of guide plates and the circumferential surface of the cone are different; the pressure relief mechanism is used to reduce the pressure of the medium at the outlet position.

[0007] The one-way valve with a pressure relief structure has a first state and a second state. In the first state, the first conical surface is separated from the second conical surface, the inlet and the outlet are connected, the guide plate and the first conical surface overlap in the radial direction of the cone, and the cone rotates; in the second state, the first conical surface is fitted with the second conical surface, the inlet and the outlet are separated, and the cone is located on the side of the first conical surface close to the inlet.

[0008] Preferably, each support plate is spirally arranged on the circumference of the truncated cone, and the spiral axis of the support plate extends along the first direction.

[0009] Preferably, the circumferential surface of the cone and the second conical surface are coplanar.

[0010] Preferably, the two groups of multiple guide plates are alternately arranged in sequence in the circumferential direction of the cone.

[0011] Preferably, the guide plate is an arc-shaped plate, and its axis is coaxial with the cone.

[0012] Preferably, the cross-section of the inner cavity perpendicular to the first direction is circular, and the inner cavity includes a sliding hole, a temporary storage chamber and a buffer chamber distributed in sequence from the outlet to the inlet along the first direction. The sliding hole is connected to the outlet, and the valve core is slidingly arranged in the sliding hole and the temporary storage chamber. A first spring is provided in the sliding hole for providing power to the valve core; the cross-section of the temporary storage chamber perpendicular to the first direction is larger than the cross-section of the sliding hole perpendicular to the first direction, a groove is provided on the side of the valve core close to the outlet, the groove is connected to the outlet, a through hole is provided on the part of the valve core located in the temporary storage chamber, and the groove is connected to the temporary storage chamber through the through hole; the cross-section of the buffer chamber perpendicular to the first direction is smaller than the cross-section of the temporary storage chamber perpendicular to the first direction, and a first conical surface is provided between the temporary storage chamber and the buffer chamber.

[0013] Preferably, the inner cavity also includes a channel, which is located between the buffer cavity and the inlet, and the cross-section of the channel perpendicular to the first direction is smaller than the cross-section of the buffer cavity perpendicular to the first direction; one group of guide plates is provided with a friction plate on the side close to the channel, and the one-way valve with a pressure relief structure is in the second state, and the friction plate is rotationally connected to the channel, and in the first state, the friction plate is separated from the channel.

[0014] Preferably, the pressure relief mechanism includes a sleeve, a cover, a baffle, a connecting rod and a second spring. One end of the sleeve is arranged on the valve body and is connected to the outlet. The cover is arranged at the end of the sleeve away from the valve body. The baffle is slidably arranged in the sleeve and separates the sleeve into two isolated chambers. One end of the connecting rod is connected to a side of the baffle away from the outlet, and the other end of the connecting rod passes through the cover and is slidably connected to the cover. The second spring is sleeved on the connecting rod, and the two ends of the second spring are respectively connected to the baffle and the cover. A pressure relief port is opened on the circumferential surface of the sleeve for connecting with the outlet when pressure relief is required at the outlet.

[0015] Preferably, the cover is threadedly connected to the sleeve, and the cover can slide relative to the sleeve along the axial direction of the sliding rod.

[0016] Preferably, the sleeve is threadedly connected to the valve body.

[0017] The beneficial effects of the present invention are as follows: in the first state of the one-way valve with a pressure relief structure, through the coordinated arrangement of the cone and the guide plate, the medium will be guided to flow in a direction parallel to the second conical surface after hitting the guide plate, and at the same time, a flow channel parallel to the second conical surface will be formed between the guide plate and the second conical surface, and the medium can flush the second conical surface, reducing the adhesion of impurity particles on the second conical surface; the guide plate diverts the medium, and the medium passing between the cone and the guide plate will hit the cone, and a channel parallel to the first conical surface will also be formed between the cone and the guide plate, and the medium flows along the circumferential surface of the cone to the first conical surface, reducing the impact of the medium on the first conical surface.

[0018] By setting different distances between the two groups of guide plates and the cone, the flow rates of the medium in the flow channel formed between the same guide plate and the cone and the second conical surface are inconsistent. The rotating cone causes the same position of the first conical surface and the second conical surface to pass through different groups of guide plates, so that the impact force of the medium at this position on the first conical surface and the second conical surface is different, forming a pulse-like impact, thereby improving the cleaning effect of the first conical surface and the second conical surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a one-way valve with a pressure relief structure provided by an embodiment of the present invention;

[0020] Figure 2 A front view of a one-way valve with a pressure relief structure provided by an embodiment of the present invention;

[0021] Figure 3 for Figure 2 Cross-sectional view along the AA axis;

[0022] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0023] Figure 5 A schematic structural diagram of a valve core of a one-way valve with a pressure relief structure provided by an embodiment of the present invention;

[0024] Figure 6 A front view of a valve core of a one-way valve with a pressure relief structure provided by an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of a first state of a one-way valve with a pressure relief structure provided by an embodiment of the present invention;

[0026] Figure 8 for Figure 7 Enlarged view of point C in the middle.

[0027] Among them: 100, valve body; 101, valve core; 102, inlet; 103, outlet; 104, first cone surface; 105, second cone surface; 106, frustum; 107, support plate; 108, guide plate; 109, sliding hole; 110, temporary storage chamber; 111, buffer cavity; 112, first spring; 113, groove; 114, through hole; 115, channel; 116, friction plate; 201, sleeve; 202, cover; 203, baffle; 204, connecting rod; 205, second spring; 206, pressure relief port. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0030] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] like Figures 1 to 8As shown, an embodiment of the present invention provides a one-way valve with a pressure relief structure, including a valve body 100, a valve core 101, a flow guide mechanism and a pressure relief mechanism. An inner cavity is provided in the valve body 100, and an inlet 102 and an outlet 103 connected to the inner cavity are provided on the valve body 100. The inlet 102, the inner cavity and the outlet 103 are arranged along a first direction, which is the flow direction of the medium; a first conical surface 104 is provided in the inner cavity, and the valve core 101 is slidably arranged in the inner cavity along the first direction, and a second conical surface 105 adapted to the first conical surface 104 is provided on the valve core 101. The valve body 100 cuts off the communication between the inlet 102 and the outlet 103 by fitting the first conical surface 104 and the second conical surface 105; the axes of the first conical surface 104 and the second conical surface 105 both extend along the first direction. The flow guide mechanism includes a truncated cone 106, multiple support plates 107, and multiple guide plates 108. The larger end of the truncated cone 106 is rotatably mounted on the valve core 101. The truncated cone 106 is located on the side of the valve core 101 near the inlet 102. The truncated cone 106 is coaxial with the second conical surface 105, and the circumference of the truncated cone 106 is parallel to the second conical surface 105. Multiple guide plates 108 are distributed around the circumference of the truncated cone 106. Each guide plate 108 is connected to the circumference of the truncated cone 106 via a support plate 107. The guide plates 108 are located on the inner side of the first conical surface 104, and each guide plate 108 is parallel to the circumference of the truncated cone 106 at its location. The multiple guide plates 108 are divided into two groups, and the distances between the two groups of guide plates 108 and the circumference of the truncated cone 106 are unequal. The pressure relief mechanism is used to reduce the pressure of the medium at the outlet 103.

[0032] The one-way valve with a pressure relief structure has a first state and a second state. In the first state, the first conical surface 104 is separated from the second conical surface 105, the inlet 102 and the outlet 103 are connected, the guide plate 108 and the first conical surface 104 overlap in the radial direction of the cone 106, and the cone 106 rotates; in the second state, the first conical surface 104 is fitted with the second conical surface 105, the inlet 102 and the outlet 103 are separated, and the cone 106 is located on the side of the first conical surface 104 close to the inlet 102.

[0033] In the first state of the one-way valve with a pressure relief structure, through the coordinated arrangement of the cone 106 and the guide plate 108, the medium will be guided to flow in a direction parallel to the second conical surface 105 after hitting the guide plate 108. At the same time, a flow channel parallel to the second conical surface 105 will be formed between the guide plate 108 and the second conical surface 105, and the medium can flush the second conical surface 105, reducing the adhesion of impurity particles on the second conical surface 105; the guide plate 108 diverts the medium, and the medium passing between the cone 106 and the guide plate 108 will hit the cone 106. A flow channel parallel to the first conical surface 104 will also be formed between the cone 106 and the guide plate 108, and the medium flows along the circumferential surface of the cone 106 to the first conical surface 104, reducing the impact of the medium on the first conical surface 104.

[0034] By setting different distances between the two groups of guide plates 108 and the cone 106, the flow rates of the medium in the flow channel formed between the same guide plate 108 and the cone 106 and the second conical surface 105 are inconsistent. The rotating cone 106 causes the same position of the first conical surface 104 and the second conical surface 105 to pass through different groups of guide plates 108, so that the impact force of the medium at this position on the first conical surface 104 and the second conical surface 105 is different, forming a pulse-like impact, thereby improving the cleaning effect of the first conical surface 104 and the second conical surface 105.

[0035] In this embodiment, each support plate 107 is spirally arranged on the circumferential surface of the cone 106, and the spiral axis of the support plate 107 extends along the first direction. When the one-way valve with a pressure relief structure is in the first state, there is an angle between the flow direction of the medium flowing from the inlet 102 to the outlet 103 and the support plate 107. After the support plate 107 is subjected to the impact force of the medium, it will drive the cone 106 to rotate, thereby causing the two sets of guide plates 108 to rotate, and the flow speed of the medium at the same position of the first conical surface 104 and the second conical surface 105 changes, so that the medium can better flush the first conical surface 104 and the second conical surface 105.

[0036] In this embodiment, the circumferential surface of the cone 106 is coplanar with the second conical surface 105, and the diameter of the large end of the cone 106 is consistent with the diameter of the small end of the second conical surface 105. After the medium is guided by the conical surface of the cone 106 and leaves the cone 106, it will flow along its own flow direction to the second conical surface 105, while reducing the impact force on the second conical surface 105. At the same time, the second conical surface 105 can also be fully flushed, avoiding the formation of a dead angle between the second conical surface 105 and the cone 106, causing the accumulation of impurity particles, and extending the service life of the one-way valve with a pressure relief structure.

[0037] In this embodiment, two groups of multiple guide plates 108 are alternately arranged in the circumferential direction of the cone 106 , which can increase the pulse frequency and further improve the cleaning effect on the first conical surface 104 and the second conical surface 105 .

[0038] In this embodiment, the guide plate 108 is an arc-shaped plate, and its axis is coaxial with the cone 106. The flow channel formed by the guide plate 108, the first conical surface 104 and the second conical surface 105 has a better guiding effect.

[0039] In this embodiment, the cross-section of the inner cavity perpendicular to the first direction is circular, and the inner cavity includes a sliding hole 109, a temporary storage chamber 110 and a buffer chamber 111 distributed in sequence from the outlet 103 to the inlet 102 along the first direction. The sliding hole 109 is connected to the outlet 103, and the valve core 101 is slidably arranged in the sliding hole 109 and the temporary storage chamber 110. The sliding hole 109 guides the movement of the valve core 101 to prevent the valve core 101 from deviating. A first spring 112 is provided in the sliding hole 109 for providing power to the valve core 101. A fixing ring is provided in the sliding hole 109, which is connected to the valve body 100 and is located between the outlet 103 and the valve core 101. The first spring 112 is extended and retracted along the first direction, and one end of the first spring 112 abuts against the fixing ring, and the other end of the first spring 112 abuts against the valve core 101; the cross section of the temporary chamber 110 perpendicular to the first direction is larger than the cross section of the sliding hole 109 perpendicular to the first direction, and a groove 113 is provided on the side of the valve core 101 close to the outlet 103, and the groove 113 is aligned with the outlet 103. 3 is connected. A through hole 114 is provided on the portion of the valve core 101 located in the temporary storage chamber 110. The groove 113 is connected to the temporary storage chamber 110 through the through hole 114. The cross section of the buffer chamber 111 perpendicular to the first direction is smaller than the cross section of the temporary storage chamber 110 perpendicular to the first direction. The first conical surface 104 is provided between the temporary storage chamber 110 and the buffer chamber 111. In the second state of the one-way valve with a pressure relief structure, the guide plate 108 is located in the buffer chamber 111. In the first state of the one-way valve with a pressure relief structure, the medium in the buffer chamber 111 enters the temporary storage chamber 110 through the first conical surface 104.

[0040] In this embodiment, the inner cavity also includes a channel 115, which is located between the buffer cavity 111 and the inlet 102, and the cross-section of the channel 115 perpendicular to the first direction is smaller than the cross-section of the buffer cavity 111 perpendicular to the first direction; one group of guide plates 108 is provided with a friction plate 116 on the side close to the channel 115, and the one-way valve with a pressure relief structure is in the second state, and the friction plate 116 is rotatably connected to the channel 115. In the first state, the friction plate 116 is separated from the channel 115, and when the friction plate 116 contacts the channel 115, a friction force less than the elastic force of the first spring 112 is generated, which is used to decelerate the moving valve core 101, and when the one-way valve with a pressure relief structure switches from the second state to the first state, the impact force of the first cone surface 104 and the second cone surface 105 is reduced.

[0041] In this embodiment, the pressure relief mechanism includes a sleeve 201, a cover 202, a baffle 203, a connecting rod 204 and a second spring 205. One end of the sleeve 201 is arranged on the valve body 100 and is connected to the outlet 103. The cover 202 is arranged at the end of the sleeve 201 away from the valve body 100. The baffle 203 is slidably arranged in the sleeve 201 and divides the sleeve 201 into two isolated chambers. One end of the connecting rod 204 is connected to a surface of the baffle 203 away from the outlet 103, and the other end of the connecting rod 204 passes through the cover 202 and is slidably connected to the cover 202. A pull ring is provided on the end of the connecting rod 204 away from the baffle 203. The second spring 205 is sleeved on the connecting rod 204, and the two ends of the second spring 205 are respectively connected to the baffle 203 and the cover 202. A pressure relief port 206 is opened on the circumferential surface of the sleeve 201 for communicating with the outlet 103 when the outlet 103 needs to be relieved. Under normal conditions, the pressure relief port 206 is located on the side of the baffle 203 away from the outlet 103. When the pressure within the outlet 103 exceeds the preset safety pressure of the valve body 100, the pressure within the outlet 103 overcomes the elastic force of the second spring 205, pushing the baffle 203 to slide. After the baffle 203 passes over the pressure relief port 206, the pressure relief port 206 is connected to the outlet 103, completing the pressure relief. Pulling the pull ring can also drive the baffle 203 over the pressure relief port 206 via the connecting rod 204, which is used to test the pressure relief mechanism and prevent damage to the pressure relief mechanism from being affected by untimely replacement, which could affect the safe use of the valve body 100.

[0042] In this embodiment, the cover 202 is threadedly connected to the sleeve 201, and the cover 202 can slide relative to the sleeve along the axial direction of the slide rod. Rotating the cover 202 can push the baffle 203 away from the pressure relief port 206 through the second spring 205, so that the pressure when the baffle 203 passes over the pressure relief port 206 increases, thereby adjusting the preset safety pressure of the inlet 102.

[0043] In this embodiment, the sleeve 201 is threadedly connected to the valve body 100, which facilitates maintenance and replacement of the pressure relief mechanism.

[0044] The working principle of the one-way valve with a pressure relief structure provided in the above embodiment is:

[0045] First, the valve body 100 is installed between the two pipes. At this time, the one-way valve with a pressure relief structure (hereinafter referred to as the one-way valve) is in the second state; the flow direction of the medium in the pipe is from the inlet 102 to the outlet 103. When the medium pressure in the pipe is greater than the elastic force of the first spring 112, the valve core 101 will be pushed to move along the first direction away from the inlet 102. At this time, the one-way valve switches from the second state to the first state. The moving valve core 101 will compress the first spring 112, and at the same time, the first cone surface 104 and the second cone surface 105 will separate. The valve core 101 will also drive the cone 106 to slide in the buffer chamber 111. The cone 106 drives the friction plate 116 to gradually move away from the channel 115 through the guide plate 108 connected to the friction plate 116. The medium in the buffer chamber 111 passes between the first conical surface 104 and the second conical surface 105 under the guidance of the guide plate 108 and the cone 106, and then enters the temporary storage chamber 110. The medium entering the temporary storage chamber 110 enters the groove 113 of the valve core 101 through the through hole 114, and then flows to the outlet 103 through the fixed circulation.

[0046] The valve core 101 drives the circular table 106 to continue moving until the guide plate 108 enters the inner side of the first conical surface 104 and the friction plate 116 separates from the channel 115. At this time, the one-way valve is in the first state. The medium passing between the guide plate 108 and the circular table 106 impacts the circumferential surface of the circular table 106 and changes its flow direction under the guidance of the circumferential surface of the circular table 106, and the flow direction of the medium is parallel to the second conical surface 105. The medium passing between the guide plate 108 and the first conical surface 104 will impact the guide plate 108 and, under the guidance of the guide plate 108, its flow direction is parallel to the first conical surface 104. The distances between the same guide plate 108 and the cone 106 and the first conical surface 104 are inconsistent, and the flow rates of the media on both sides of the guide plate 108 are different. In the process of the media entering the temporary storage chamber 110 from the buffer chamber 111, the support plate 107 will be pushed to rotate around the axis of the cone 106. The support plate 107 drives the cone 106 to rotate synchronously, and the cone 106 drives the guide plate 108 to rotate synchronously. Each guide plate 108 can correspond to any position on the first conical surface 104 and the second conical surface 105. The flow rates of the media passing through the same position of the first conical surface 104 and the second conical surface 105 are different, and the impacts of the media on the first conical surface 104 and the second conical surface 105 are different, which can improve the cleaning effect of the media on the first conical surface 104 and the second conical surface 105.

[0047] When the medium pressure at the inlet 102 decreases and is not sufficient to overcome the elastic force of the first spring 112, the valve core 101 approaches the inlet 102 under the action of the first spring 112, and the valve core 101 pushes the round table 106 to move. Then the friction plate 116 moves into the channel 115 and contacts the channel 115. At this time, the first spring 112 is subjected to the friction resistance between the friction plate 116 and the channel 115, slowing down the movement speed of the valve core 101 until the second conical surface 105 on the valve core 101 fits into the first conical surface 104, and the one-way valve switches to the second state.

[0048] When the pressure at the outlet 103 of the one-way valve is greater than the preset safety pressure value, the medium at the outlet 103 will push the baffle 203 to slide in the sleeve, and the baffle 203 compresses the second spring 205 and approaches the pressure relief port 206 until it passes over the pressure relief port 206. After the pressure relief port 206 is connected to the outlet 103, the medium in the outlet 103 is discharged through the pressure relief port 206, thereby reducing the pressure in the outlet 103.

[0049] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A one-way valve with a pressure relief structure, characterized in that: include: The valve body, the valve core, the flow guiding mechanism and the pressure relief mechanism are provided in the valve body, and the valve body is provided with an inner cavity, and an inlet and an outlet communicating with the inner cavity are arranged in a first direction, and the first direction is the flow direction of the medium; a first conical surface is provided in the inner cavity, and the valve core is slidably arranged in the inner cavity along the first direction, and a second conical surface is provided on the valve core that is adapted to the first conical surface, and the axes of the first conical surface and the second conical surface both extend in the first direction; the flow guiding mechanism includes a frustum, a plurality of support plates and a plurality of flow guiding plates, and the large frustum of the frustum is provided. The end is rotatably arranged on the valve core, the cone is located on the side of the valve core close to the inlet, the cone is coaxial with the second conical surface, and the circumferential surface of the cone is parallel to the second conical surface; multiple guide plates are distributed around the circumference of the cone, each guide plate is connected to the circumferential surface of the cone through a support plate, the guide plates are located on the inner side of the first conical surface, and each guide plate is parallel to the circumferential surface of the cone at its location; the multiple guide plates are divided into two groups, and the distances between the two groups of guide plates and the circumferential surface of the cone are different; the pressure relief mechanism is used to reduce the pressure of the medium at the outlet position; The one-way valve with a pressure relief structure has a first state and a second state. In the first state, the first conical surface is separated from the second conical surface, the inlet and the outlet are connected, the guide plate and the first conical surface overlap in the radial direction of the cone, and the cone rotates; in the second state, the first conical surface is fitted with the second conical surface, the inlet and the outlet are separated, and the cone is located on the side of the first conical surface close to the inlet.

2. A one-way valve with a pressure relief structure according to claim 1, characterized in that: Each support plate is spirally arranged on the circumference of the truncated cone, and the spiral axis of the support plate extends along the first direction.

3. The one-way valve with a pressure relief structure according to claim 1, characterized in that: The circumferential surface of the frustum is coplanar with the second conical surface.

4. The one-way valve with a pressure relief structure according to claim 1, characterized in that: The two groups of multiple guide plates are alternately arranged in sequence in the circumferential direction of the cone.

5. The one-way valve with a pressure relief structure according to claim 1, characterized in that: The guide plate is an arc-shaped plate, and its axis is coaxial with the cone.

6. The one-way valve with a pressure relief structure according to claim 1, characterized in that: The cross-section of the inner cavity perpendicular to the first direction is circular, and the inner cavity includes a sliding hole, a temporary storage chamber and a buffer chamber distributed in sequence from the outlet to the inlet along the first direction. The sliding hole is connected to the outlet, and the valve core is slidingly arranged in the sliding hole and the temporary storage chamber. A first spring is provided in the sliding hole for providing power to the valve core; the cross-section of the temporary storage chamber perpendicular to the first direction is larger than the cross-section of the sliding hole perpendicular to the first direction, a groove is provided on the side of the valve core close to the outlet, the groove is connected to the outlet, a through hole is provided on the part of the valve core located in the temporary storage chamber, and the groove is connected to the temporary storage chamber through the through hole; the cross-section of the buffer chamber perpendicular to the first direction is smaller than the cross-section of the temporary chamber in the first direction, and a first conical surface is provided between the temporary storage chamber and the buffer chamber.

7. The one-way valve with a pressure relief structure according to claim 6, characterized in that: The inner cavity also includes a channel, which is located between the buffer cavity and the inlet, and the cross-section of the channel perpendicular to the first direction is smaller than the cross-section of the buffer cavity perpendicular to the first direction; one group of guide plates is provided with a friction plate on the side close to the channel, and the one-way valve with a pressure relief structure is in the second state, and the friction plate is rotationally connected to the channel, and in the first state, the friction plate is separated from the channel.

8. The one-way valve with a pressure relief structure according to claim 1, characterized in that: The pressure relief mechanism includes a sleeve, a cover, a baffle, a connecting rod and a second spring. One end of the sleeve is arranged on the valve body and is connected to the outlet. The cover is arranged at the end of the sleeve away from the valve body. The baffle is slidably arranged in the sleeve and separates the sleeve into two isolated chambers. One end of the connecting rod is connected to the side of the baffle away from the outlet, and the other end of the connecting rod passes through the cover and is slidably connected to the cover. The second spring is sleeved on the connecting rod, and the two ends of the second spring are respectively connected to the baffle and the cover. A pressure relief port is opened on the circumferential surface of the sleeve, which is used to connect with the outlet when the outlet needs to be relieved.

9. The one-way valve with a pressure relief structure according to claim 8, characterized in that: The cover is threadedly connected to the sleeve, and the cover can slide relative to the sleeve along the axial direction of the sliding rod.

10. The one-way valve with a pressure relief structure according to claim 8, characterized in that: The sleeve is threadedly connected to the valve body.

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