A one-way valve

Abstract

The application discloses a one-way valve, which comprises a valve body, a first blocking wall arranged in the valve body and provided with a flow-limiting ring opening, a second blocking wall arranged in the valve body, the second blocking wall being oppositely arranged with the first blocking wall and forming a containing space, a limiting structure arranged on the second blocking wall and located in the containing space, a through-hole structure extending at least partially on the second blocking wall, the through-hole structure being communicated with the containing space, a valve core located in the containing space, the valve core being provided with a containing position with an opening on one side close to the second blocking wall, the limiting structure being sleeved on the valve core and blocking the opening to seal the containing position, the through-hole structure being located outside the containing position, an elastic structure located in the containing position and abutting against one end of the valve core and the other end of the second blocking wall, the elastic structure being in a compressed state, the elastic structure being capable of extending and contracting in an axial direction and being used for driving the valve core to shield and open the flow-limiting ring opening, and the elastic structure being isolated from the through-hole structure, so that fluid does not pass through the elastic structure, and the valve core is prevented from being stuck due to fluid corrosion.

Description

Technical Field

[0001] This application relates to the field of fluid control device technology, and more particularly to a one-way valve. Background Technology

[0002] One-way valves, as important control components for achieving unidirectional flow of media, are widely used in machinery manufacturing, petrochemicals, and other fields. While existing one-way valves offer good sealing performance, their elastic elements are exposed. This means that when the valve core opens, the fluid submerges the elastic element as it passes through, subjecting it to long-term fluid friction and corrosion. Especially after prolonged corrosion, the elastic element is prone to valve core jamming when conveying high-viscosity media or fluids containing particulate impurities, thus affecting the valve's stability and reliability.

[0003] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0004] The technical problem to be solved by this application is to provide a one-way valve that addresses the above-mentioned deficiencies of the prior art, thereby solving the problem that the elastic element is exposed and easily corroded by the fluid in the prior art.

[0005] The technical solution adopted by this application to solve the technical problem is as follows:

[0006] A one-way valve includes a valve body, and further includes:

[0007] The first baffle is disposed in the valve body and has a flow-limiting ring.

[0008] A second baffle is disposed within the valve body; the second baffle is arranged opposite to the first baffle and together form an accommodating space;

[0009] A limiting structure is disposed on the second baffle wall and located within the receiving space;

[0010] A through-hole structure extends at least partially onto the second baffle wall; the through-hole structure communicates with the receiving space.

[0011] A valve core is located within the receiving space; the valve core has an open receiving position on the side near the second baffle wall, the limiting structure is sleeved on the valve core and blocks the opening to seal the receiving position; the through hole structure is located outside the receiving position;

[0012] An elastic structure is located within the receiving position, with one end abutting the valve core and the other end abutting the second baffle; the elastic structure is in a compressed state; the elastic structure can extend and retract axially and is used to drive the valve core to block and open the flow-limiting ring.

[0013] The one-way valve, wherein the valve core includes:

[0014] The movable part is inserted into the limiting structure at one end and can reciprocate relative to the limiting structure along the axial direction; the receiving position is located inside the movable part and passes through the movable part along the axial direction.

[0015] The fitting part is disposed at one end of the movable part outside the limiting structure and corresponds to the flow-limiting ring opening; in the natural state, the fitting part fits against the first baffle wall to block the flow-limiting ring opening.

[0016] The one-way valve further includes:

[0017] A support shaft is disposed on the second baffle and located within the limiting structure; there is a gap between the support shaft and the limiting structure, and one end of the moving part away from the fitting part is inserted into the gap and contacts the support shaft; the support shaft abuts against the elastic structure.

[0018] The one-way valve, wherein the through-hole structure includes:

[0019] At least one first through hole is provided on the second baffle wall and located outside the defined structure.

[0020] The one-way valve, wherein there are multiple first through holes; the multiple first through holes are arranged around the periphery of the defined structure.

[0021] The one-way valve, wherein the valve core further includes:

[0022] A first annular isolation portion is coaxially disposed within the movable portion; the receiving position is located between the first annular isolation portion and the movable portion.

[0023] A second annular isolation portion is coaxially provided on the second baffle wall. The second annular isolation portion is inserted into the receiving position and abuts against the elastic structure.

[0024] The one-way valve, wherein the through-hole structure includes:

[0025] At least one second through hole is provided on the outer circumferential surface of the fitting part and communicates with the central hole of the first annular isolation part;

[0026] At least one third through hole extends axially through the center of the second baffle; the third through hole is connected to the center hole of the first annular isolation part and the center hole of the second annular isolation part respectively.

[0027] The one-way valve, wherein the defining structure includes:

[0028] An annular protrusion is arranged coaxially with the movable part and sleeved on the outside of the movable part.

[0029] The one-way valve, wherein the valve body includes:

[0030] Inflow valve sleeve; the first baffle is located inside the inflow valve sleeve;

[0031] An outflow valve sleeve is coaxially disposed on the outlet side of the inflow valve sleeve; the second baffle is located inside the outflow valve sleeve.

[0032] The one-way valve, wherein the inflow valve sleeve and the outflow valve sleeve are integrally formed.

[0033] Beneficial effects: This application changes the flow path of the fluid by changing the position of the through hole structure. The elastic structure is protected by the containment position, and the fluid no longer passes through the elastic structure in the valve body, reducing or even avoiding the corrosion of the elastic structure by the fluid. Especially when conveying high viscosity media or fluids containing particulate impurities, it avoids the problem of valve core jamming, thereby improving the stability and reliability of the valve. Attached Figure Description

[0034] Figure 1 This is an overall sectional view of the check valve in Embodiment 1 of this application;

[0035] Figure 2 This is a partial structural diagram of the valve body when there is only one first through hole in Embodiment 1 of this application;

[0036] Figure 3 This is a partial structural diagram of the valve body when there are multiple first through holes in Embodiment 1 of this application;

[0037] Figure 4 This is a partial structural cross-sectional view of the valve body when there are multiple first through holes in Embodiment 1 of this application;

[0038] Figure 5 This is a partially exploded structural diagram of the one-way valve when there are multiple first through holes in Embodiment 1 of this application;

[0039] Figure 6 This is a cross-sectional view of the valve core in Embodiment 1 of this application;

[0040] Figure 7 This is a schematic diagram showing the distribution of the flow-limiting coil within the valve body in this application;

[0041] Figure 8 This is an overall cross-sectional view of the check valve when the flow-limiting coil is open in Embodiment 2 of this application;

[0042] Figure 9 This is an overall cross-sectional view of the check valve when the flow-limiting coil is closed in Embodiment 2 of this application;

[0043] Figure 10 This is a schematic diagram of the assembly of the valve core and the limiting structure in Embodiment 2 of this application;

[0044] Figure 11 This is a partial structural schematic diagram of the valve body in Embodiment 2 of this application;

[0045] Figure 12 This is a cross-sectional view of the valve core in Embodiment 2 of this application;

[0046] Figure 13 This is a schematic diagram showing the distribution of the limiting structure and the second annular limiting part within the valve body in Embodiment 2 of this application;

[0047] Figure 14 This is a partially exploded structural diagram of the one-way valve in Embodiment 2 of this application. Detailed Implementation

[0048] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0049] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0050] The applicant of this application discovered through research that a check valve relies on the extension and contraction of an elastic element to drive the valve core to move axially, thereby opening and closing the check valve by blocking and opening the flow-limiting ring. However, the elastic element itself is located within the fluid passage; when the check valve opens, the fluid passes through the valve body and submerges the elastic element, causing it to be corroded by the fluid. After long-term corrosion, especially when conveying high-viscosity media or fluids containing particulate impurities, the elastic element is prone to valve core jamming, thus affecting the stability and reliability of the valve.

[0051] To solve the above-mentioned technical problems, this application provides a one-way valve, such as... Figure 1 , Figure 8 and Figure 9 As shown, the one-way valve includes: a valve body 1, a first baffle wall 2, a second baffle wall 3, a limiting structure 4, a through-hole structure, a valve core 5, and an elastic structure 6; the first baffle wall 2 is disposed within the valve body 1 and has a flow-limiting ring 20; the second baffle wall 3 is disposed within the valve body 1; the second baffle wall 3 is arranged opposite to the first baffle wall 2 and together form an accommodating space 7 (e.g., Figure 1 and Figure 8 (as shown); the limiting structure 4 is disposed on the second baffle 3 and located within the receiving space 7; the through-hole structure extends at least partially onto the second baffle 3; the through-hole structure communicates with the receiving space 7; the valve core 5 is located within the receiving space 7; the valve core 5 is provided with a receiving position 50 with an opening on the side near the second baffle 3 (as shown). Figure 5 and Figure 12 As shown), the limiting structure 4 is fitted onto the valve core 5 and blocks the opening to seal the valve core 5; the through hole structure is located outside the receiving position 50; the elastic structure 6 is located inside the receiving position 50, with one end abutting against the valve core 5 and the other end abutting against the second baffle 3; the elastic structure 6 is in a compressed state; the elastic structure 6 can extend and retract axially and is used to drive the valve core 5 to block and open the flow limiting ring 20.

[0052] Specifically, the valve body 1 is cylindrical and serves to house the first baffle 2, the second baffle 3, the limiting structure 4, the valve core 5, and the elastic structure 6. The first baffle 2 and the second baffle 3 are arranged side-by-side and opposite to each other along the axial direction. Along the flow direction of the fluid within the valve body 1, the second baffle 3 is located downstream of the first baffle 2. The valve core 5 and the limiting structure 4 are both located within the receiving space 7. The side of the valve core 5 closest to the second baffle 3 is inserted into the limiting structure 4, thereby sealing the opening of the receiving position 50 by blocking the opening of the receiving position 50. The through-hole structure is located outside the receiving position 50 and can communicate with the flow-limiting ring 20 through the receiving space 7. The elastic expansion and contraction deformation of the elastic structure 6 can drive the valve core 5 to move axially, thereby enabling the valve core 5 to block and open the flow-limiting ring 20. When the valve core 5 blocks the flow-limiting ring 20, the flow-limiting ring 20 is disconnected from the receiving space 7, realizing the shut-off between the through-hole structure and the flow-limiting ring 20, and the one-way valve is completely closed. When the valve core 5 opens the flow-limiting ring 20, the flow-limiting ring 20 is connected to the receiving space 7, realizing the opening between the through-hole structure and the flow-limiting ring 20, and the one-way valve is completely opened.

[0053] In this way, when the elastic structure 6 is assembled in the receiving position 50, it can isolate the elastic structure 6 from the receiving space 7 and the through-hole structure. When the fluid flows from the flow-limiting ring 20 towards the second baffle 3, it pushes the valve core 5 to compress the elastic structure 6. The valve core 5 moves towards the second baffle 3 and away from the first baffle 2, thus opening the flow-limiting ring 20. The flow-limiting ring 20 is connected to the through-hole structure through the receiving space 7, and the fluid flows to the outside of the check valve through the receiving space 7 and the through-hole structure without passing through the elastic structure 6. When the force of the fluid on the valve core 5 towards the second baffle 3 is insufficient to resist the force of the elastic structure 6 restoring its elastic deformation, the elastic structure 6 restores its elastic deformation and pushes the valve core 5 towards the first baffle 2 until the valve core 5 is in contact with the first baffle 2 and blocks the flow-limiting ring 20. Then the flow-limiting ring 20 and the receiving space 7 are closed, and the check valve is completely closed.

[0054] As can be seen, by changing the position of the through hole structure, this application changes the flow path of the fluid. The elastic structure 6 is protected by the receiving position 50, and the fluid no longer passes through the elastic structure 6 in the valve body 1, reducing or even avoiding the corrosion of the elastic structure 6 by the fluid. Especially when conveying high viscosity media or fluids containing particulate impurities, it avoids the problem of valve core 5 jamming, thereby improving the stability and reliability of the valve.

[0055] It should be noted that regardless of whether the flow-limiting ring 20 is blocked by the valve core 5, the through-hole structure and the receiving space 7 are always in a connected state. The elastic structure 6 is always in a compressed state; in the natural state (i.e., no fluid passes through the check valve), the elastic deformation force generated by the compression of the elastic structure 6 is used to support and hold the valve core 5, so as to ensure that the valve core 5 can block the flow-limiting ring 20, thereby ensuring that the check valve is in a normally closed state. The part of the valve core 5 inserted into the limiting structure 4 is in contact with the inner wall of the limiting structure 4, so as to ensure that the limiting structure 4 can cooperate with the valve core 5 along the radial direction of the valve body 1, thereby sealing the receiving position 50.

[0056] It is understandable that both the first baffle 2 and the second baffle 3 are circular, and the outer circumferential surfaces of both are completely in contact with the inner wall of the valve body 1, so as to ensure that the fluid can only pass through the flow-limiting ring 20 at the first baffle 2 and can only pass through the through hole structure at the second baffle 3.

[0057] In one embodiment of this application, both the first baffle 2 and the second baffle 3 are flat cylindrical structures, and the flow-limiting ring 20 is located at the center of the first baffle 2. Since the second baffle 3 needs to support the limiting structure 4 and the valve core 5, the axial height of the second baffle 3 is greater than the axial height of the first baffle 2 to ensure that the second baffle 3 has a certain structural strength.

[0058] It is understandable that the diameter of the valve core 5 on the side closest to the first baffle 2 is larger than the diameter of the flow-limiting ring 20, so as to ensure that when the valve core 5 is in contact with the first baffle 2, it can completely block the flow-limiting ring 20 and ensure that the flow-limiting ring 20 is in the closed state.

[0059] One embodiment of this application, such as Figure 7 As shown, an annular inclined portion 14 is provided at the connection between the side of the first baffle wall 2 away from the second baffle wall 3 and the valve body 1. The diameter of the annular inclined portion 14 gradually decreases along the flow direction of the fluid to reduce the impact of the fluid on the valve body 1 and the turbulence phenomenon. The connection between the annular inclined portion 14 and the first baffle wall 2, as well as the connection between the annular inclined portion 14 and the valve body 1, can be rounded.

[0060] Example 1 in this application

[0061] like Figures 1-6 As shown, the valve core 5 includes a movable portion 51 and a fitting portion 52; one end of the movable portion 51 is inserted into the limiting structure 4 and can reciprocate relative to the limiting structure 4 along the axial direction; the receiving position 50 is located inside the movable portion 51 and passes through the movable portion 51 along the axial direction; the fitting portion 52 is disposed at the end of the movable portion 51 that is outside the limiting structure 4 and corresponds to the flow-limiting ring 20; in its natural state, the fitting portion 52 fits against the first baffle 2 to block the flow-limiting ring 20. The limiting structure 4 includes an annular protrusion, which is coaxially arranged with the movable portion 51 and sleeved on the outside of the movable portion 51.

[0062] Specifically, both the moving part 51 and the fitting part 52 are cylindrical structures and are coaxially connected. Along the flow direction of the fluid in the valve body 1, the moving part 51 is located downstream of the fitting part 52. The fitting part 52 is used to fit against the first baffle 2, thereby blocking the flow-limiting ring 20. The end of the moving part 51 facing away from the fitting part 52 is inserted into the annular protrusion, so that the outer circumferential surface of the moving part 51 can overlap with the annular protrusion.

[0063] In this embodiment, the receiving position 50 extends from the axial end face of the moving part 51 away from the fitting part 52 toward the fitting part 52 and is located at the center of the moving part 51, forming a cylindrical receiving space; the elastic structure 6 is located inside the receiving position 50 and contacts the inner wall of the moving part 51, so that the elastic structure 6 occupies the entire internal space of the moving part 51, and the moving part 51 can not only isolate the elastic structure 6, but also guide the elastic deformation movement of the elastic structure 6, ensuring that the movement of the valve core 5 is an axial linear movement and reducing the offset of the valve core 5.

[0064] It should be noted that, in its natural state, the fitting part 52 adheres to the first baffle 2 and blocks the flow-limiting ring 20. The moving part 51 and the second baffle 3 do not contact each other, but the moving part 51 remains partially within the annular protrusion and does not detach from it, thus ensuring the sealing performance of the receiving position 50. The elastic structure 6 and the fitting part 52, as well as the elastic structure 6 and the second baffle 3, can be connected by welding or other methods; or they may not be connected but merely remain in contact with each other.

[0065] Based on this embodiment, the through-hole structure includes at least one first through-hole 8, which is disposed on the second baffle 3 and located outside the limiting structure 4.

[0066] Specifically, the first through hole 8 penetrates the second baffle wall 3 axially and connects the receiving space 7 to the outside. Since the first through hole 8 is located outside the annular protrusion, when fluid enters the valve body 1 and impacts the valve core 5 through the flow-limiting ring 20, causing the elastic structure 6 to be further compressed and thus giving way to the fitting part 52, the fluid enters the receiving space 7 from the flow-limiting ring 20, then enters the first through hole 8 from the receiving space 7, and flows out of the valve body 1. Due to the enclosed isolation effect of the valve core 5 and the annular protrusion on the elastic structure 6, the fluid will not contact the elastic structure 6 but will pass through the outside of the valve core 5.

[0067] One implementation method in this embodiment, such as Figure 2 As shown, there is one first through hole 8, which is located on the periphery of the annular protrusion.

[0068] Another implementation method in this embodiment, such as Figure 3 , Figure 4 andFigure 5 As shown, there are multiple first through holes 8, which are arranged around the periphery of the annular protrusion and evenly distributed, so that the multiple first through holes 8 form a centrally symmetrical geometric condition on the periphery of the annular protrusion, reducing the eccentric pressure on the valve core 5, thereby extending the service life of the one-way valve.

[0069] Understandably, check valves are used to control fluid transport, and by designing the orifice diameter of the first through-hole 8, they can accommodate fluids of different properties. For example, designing the orifice diameter of the first through-hole 8 to 10mm allows cement mortar to pass smoothly through the check valve without clogging. Correspondingly, by increasing the number of first through-holes 8, the flow rate of cement mortar can be increased.

[0070] Based on this embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the one-way valve also includes a support shaft 9, which is disposed on the second baffle 3 and located within the limiting structure 4; there is a gap 10 between the support shaft 9 and the limiting structure 4, and the end of the moving part 51 facing away from the fitting part 52 is inserted into the gap 10 and contacts the support shaft 9; the support shaft 9 abuts against the elastic structure 6.

[0071] Specifically, the support shaft 9 is disposed on the side of the second baffle 3 near the first baffle 2 and is coaxially arranged with the annular protrusion. The diameter of the support shaft 9 is smaller than the inner diameter of the annular protrusion to ensure that a gap 10 is formed between the support shaft 9 and the annular protrusion. The end of the support shaft 9 facing away from the second baffle 3 is inserted into the receiving position 50, so that the moving part 51 facing away from the fitting part 52 can be inserted into the gap 10. That is, the gap 10 between the support shaft 9 and the annular protrusion forms a clamping space to clamp the moving part 51, increasing the strength of the valve core 5 supported on the second baffle 3 and increasing the guidance of the axial reciprocating movement of the valve core 5, further improving the accuracy of ensuring that the axial linear movement of the valve core 5 can block the flow-limiting ring 20 without deviating from the flow-limiting ring 20. The outer circumferential surface of the moving part 51 contacts the inner wall of the annular protrusion, and the inner wall of the moving part 51 contacts the outer circumferential surface of the support shaft 9 to ensure that the receiving position 50 can be sealed.

[0072] Meanwhile, in addition to the annular protrusion sealing the opening of the receiving position 50 and the receiving space 7, a support shaft 9 barrier is added. In this way, even if the moving part 51 or the annular protrusion wears down due to long-term use, and fluid enters between the annular protrusion and the moving part 51, it will be blocked by the contact fit between the support shaft 9 and the moving part 51, making it difficult to enter the receiving position 50, thus improving the sealing performance of the receiving position 50.

[0073] It is understandable that the support shaft 9 and the elastic structure 6 can be connected by welding or other means.

[0074] Example 2 in this application

[0075] like Figure 8 , Figure 9 and Figure 12 As shown, the valve core 5 includes a movable portion 51, a fitting portion 52, and a first annular isolating portion 53. One end of the movable portion 51 is inserted into the limiting structure 4 and can reciprocate axially relative to the limiting structure 4. The fitting portion 52 is disposed at the end of the movable portion 51 outside the limiting structure 4 and corresponds to the flow-limiting ring 20. In its natural state, the fitting portion 52 fits against the first baffle 2 to block the flow-limiting ring 20. The first annular isolating portion 53 is coaxially disposed within the movable portion 51. The receiving position 50 is located between the first annular isolating portion 53 and the movable portion 51. Figure 8 , Figure 9 , Figure 11 and Figure 13 As shown, a second annular isolation part 11 is coaxially provided on the second baffle 3. The second annular isolation part 11 is inserted into the receiving position 50 and abuts against the elastic structure 6. The limiting structure 4 includes an annular protrusion. The annular protrusion is coaxially arranged with the moving part 51 and is sleeved on the outside of the moving part 51.

[0076] The elastic structure 6 is a cylindrical elastic structure. The elastic structure 6, the moving part 51, and the first annular isolating part 53 are all coaxially arranged, and each of the elastic structure 6, the first annular isolating part 53, and the moving part 51 has a central hole. The first annular isolating part 53 is located inside the central hole of the elastic structure 6, and both the elastic structure 6 and the first annular isolating part 53 are located inside the central hole of the moving part 51, so that the first annular isolating part 53, the elastic structure 6, and the moving part 51 form a nested ring structure. The first annular isolating part 53 is connected to the fitting part 52, and the outer circumferential surface of the first annular isolating part 53 and the inner wall of the moving part 51 form a receiving position 50 to accommodate the elastic structure 6.

[0077] In this embodiment, a first annular isolation part 53 is provided in the moving part 51 to further reduce the housing space of the elastic structure 6. Through the enclosure and limiting effect of the first annular isolation part 53 and the moving part 51 on the elastic structure 6, the guiding performance of the elastic structure 6 during elastic expansion and contraction is further improved, ensuring that the movement of the valve core 5 is axial linear movement and reducing the offset of the valve core 5.

[0078] The second annular isolating part 11 is disposed at the center of the second baffle wall 3. The diameter of the second annular isolating part 11 is smaller than the diameter of the annular protrusion, and a gap is reserved between them. The end of the second annular isolating part 11 facing away from the second baffle wall 3 is inserted between the moving part 51 and the first annular isolating part 53 (i.e., inserted into the receiving position 50), so that the opening between the moving part 51 and the first annular isolating part 53 can be blocked by the second annular isolating part 11, thereby forming a sealed receiving position 50. When the fitting part 52 fits against the first baffle wall 2, and both the moving part 51 and the first annular isolating part 53 are disengaged from the second baffle wall 3 (e.g. Figure 9 As shown, the second annular limiting part and the moving part 51 and the first annular limiting part partially overlap, and the moving part 51 and the annular protrusion also partially overlap, thereby ensuring the airtightness of the receiving position 50 and preventing fluid from entering the receiving position 50 and contacting the elastic structure 6.

[0079] Based on this embodiment, the through-hole structure includes at least one second through-hole 12 (e.g., Figure 8 , Figure 9 , Figure 10 , Figure 12 and Figure 14 (as shown) and at least one third through hole 13 (as shown) Figure 8 , Figure 9 , Figure 11 , Figure 13 and Figure 14 (as shown); the second through hole 12 is disposed on the outer circumferential surface of the fitting part 52 and communicates with the central hole of the first annular isolation part 53; the third through hole 13 penetrates the center of the second baffle 3 along the axial direction; the third through hole 13 communicates with the central hole of the first annular isolation part 53 and the central hole of the second annular isolation part 11 respectively.

[0080] Specifically, the through-hole structure is partially arranged on the second baffle wall 3 and partially arranged on the valve core 5, but it still does not pass through the elastic structure 6 to ensure that the fluid does not come into contact with the elastic structure 6. The second through-hole 12 is arranged radially along the fitting portion 52 and extends from the outer circumferential surface of the fitting portion 52 toward the center of the fitting portion 52; one end of the second through-hole 12 away from the outer circumferential surface of the fitting portion 52 also passes through the fitting portion 52 and communicates with the central hole of the first annular isolation portion 53. The third through-hole 13 is provided at the center of the second baffle wall 3, thereby communicating with the central hole of the first annular isolation portion 53 and the central hole of the second annular isolation portion 11; therefore, under the joint connection of the first annular isolation portion 53 and the second annular isolation portion 11, the second through-hole 12 and the third through-hole 13 communicate with each other, while the first annular isolation portion 53 and the second annular isolation portion 11 isolate the elastic structure 6 from the fluid from the inside of the elastic structure 6, and the moving portion 51 isolates the fluid from the outside of the elastic structure 6.

[0081] When fluid enters the valve body 1 and impacts the valve core 5 through the flow-limiting ring 20, the elastic structure 6 is further compressed, thereby giving way to the contact part 52, and the flow-limiting ring 20 opens (e.g. Figure 8 As shown, the fluid enters the receiving space 7 from the flow-limiting ring 20, and then sequentially enters the second through hole 12, the central hole of the first annular isolation part 53, the central hole of the second annular isolation part 11, and the third through hole 13, finally flowing to the outside of the valve body 1. Under the enclosing isolation effect of the first annular isolation part 53, the second annular isolation part 11, and the annular protrusion on the elastic structure 6, although the fluid entering the valve core 5 does not contact the elastic structure 6, it passes through the outside of the elastic structure 6.

[0082] Based on Embodiment 1 or Embodiment 2, the elastic structure 6 includes a spring. By placing the spring within the receiving position 50, the spring's own elastic properties can also achieve buffering, further avoiding the impact on the valve body 1 when pulsating fluid flows through it, thereby reducing damage to the check valve.

[0083] Based on Embodiment 1 or Embodiment 2, the side of the fitting portion 52 that contacts the first baffle 2 is a flat surface or a spherical surface. When the side of the fitting portion 52 that contacts the first baffle 2 is a spherical surface (e.g.... Figure 6 As shown, the flow-limiting ring 20 of the first baffle 2 can be chamfered to increase the contact area between the flow-limiting ring 20 and the fitting part 52, making the two fit more tightly and improving the sealing effect of the valve core 5 on the flow-limiting ring 20.

[0084] Based on Embodiment 1 or Embodiment 2, the material of the valve core 5 can be changed according to the fluid. For example, special alloy materials or polyetheretherketone materials can be used to transport special fluids, reducing the corrosion of the valve core 5 by the special fluid and extending the service life of the valve core 5; or the fitting part 52 can be made of wear-resistant alloy materials (such as titanium alloy fitting part 52), reducing the wear generated by the fitting part 52 when it cooperates with the first baffle 2 to block the flow limiting ring 20, thereby extending the service life of the valve core 5.

[0085] Based on Embodiment 1 or Embodiment 2, the check valve in this application can be made to meet the small size requirements of special working conditions and is suitable for different application scenarios. The diameter of the check valve is 15mm to 20mm, and the axial height of the check valve is 20mm to 25mm.

[0086] Based on Embodiment 1 or Embodiment 2, such as Figure 1 , Figure 5 , Figure 8 and Figure 14As shown, the valve body 1 includes an inflow valve sleeve 101 and an outflow valve sleeve 102; a first baffle 2 is located inside the inflow valve sleeve 101; the outflow valve sleeve 102 is coaxially disposed on the outlet side of the inflow valve sleeve 101; and a second baffle 3 is located inside the outflow valve sleeve 102.

[0087] Machining the valve body 1 as a single unit would be difficult due to the complexity of its internal structure. In contrast, the inflow valve sleeve 101 and the outflow valve sleeve 102 in this application are separate structures. They are machined independently before assembly, simplifying the process and ensuring higher precision. Furthermore, the separate structure of the inflow valve sleeve 101 and the outflow valve sleeve 102 facilitates the installation of internal components such as the valve core 5 and the elastic structure 6, and allows for easier replacement or maintenance of parts later, preventing the entire unit from being scrapped.

[0088] The inflow valve sleeve 101 and the first baffle wall 2 are integrally formed to improve the stability of the connection between the first baffle wall 2 and the inflow valve sleeve 101; the outflow valve sleeve 102 and the second baffle wall 3 are integrally formed to improve the stability of the connection between the second baffle wall 3 and the outflow valve sleeve 102.

[0089] In summary, this application provides a one-way valve, comprising: a valve body; a first baffle wall disposed within the valve body and having a flow-limiting ring; a second baffle wall disposed within the valve body; the second baffle wall and the first baffle wall being arranged opposite to each other and enclosing a receiving space; a limiting structure disposed on the second baffle wall and located within the receiving space; a through-hole structure extending at least partially to the second baffle wall; the through-hole structure communicating with the receiving space; a valve core located within the receiving space; a receiving position with an opening provided on the side of the valve core near the second baffle wall; the limiting structure being sleeved on the valve core and blocking the opening to seal the receiving position; the through-hole structure located outside the receiving position; an elastic structure located within the receiving position, with one end abutting against the valve core and the other end abutting against the second baffle wall; the elastic structure being in a compressed state; the elastic structure being axially expandable and contractible, and used to drive the valve core to block and open the flow-limiting ring. This application alters the fluid flow path by changing the position of the through-hole structure. The elastic structure is protected by the containment position, and the fluid no longer passes through the elastic structure within the valve body. This reduces or even eliminates the corrosion of the elastic structure by the fluid. Especially when conveying high-viscosity media or fluids containing particulate impurities, it avoids the problem of valve core jamming, thereby improving the stability and reliability of the valve.

[0090] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A one-way valve, comprising a valve body, characterized in that, It also includes: The first baffle is disposed in the valve body and has a flow-limiting ring. A second baffle is disposed within the valve body; the second baffle is arranged opposite to the first baffle and together form an accommodating space; A limiting structure is disposed on the second baffle wall and located within the receiving space; A through-hole structure extends at least partially onto the second baffle wall; the through-hole structure communicates with the receiving space. A valve core is located within the receiving space; the valve core has an open receiving position on the side near the second baffle wall, the limiting structure is sleeved on the valve core and blocks the opening to seal the receiving position; the through hole structure is located outside the receiving position; An elastic structure is located within the receiving position, with one end abutting the valve core and the other end abutting the second baffle; the elastic structure is in a compressed state; the elastic structure can extend and retract axially and is used to drive the valve core to block and open the flow-limiting ring.

2. The one-way valve according to claim 1, characterized in that, The valve core includes: The movable part is inserted into the limiting structure at one end and can reciprocate relative to the limiting structure along the axial direction; the receiving position is located inside the movable part and passes through the movable part along the axial direction. The fitting part is disposed at one end of the movable part outside the limiting structure and corresponds to the flow-limiting ring opening; in the natural state, the fitting part fits against the first baffle wall to block the flow-limiting ring opening.

3. The one-way valve according to claim 2, characterized in that, It also includes: A support shaft is disposed on the second baffle and located within the limiting structure; there is a gap between the support shaft and the limiting structure, and one end of the moving part away from the fitting part is inserted into the gap and contacts the support shaft; the support shaft abuts against the elastic structure.

4. The one-way valve according to claim 2, characterized in that, The through-hole structure includes: At least one first through hole is provided on the second baffle wall and located outside the defined structure.

5. The one-way valve according to claim 4, characterized in that, There are multiple first through holes; the multiple first through holes are arranged around the periphery of the defined structure.

6. The one-way valve according to claim 2, characterized in that, The valve core also includes: A first annular isolation portion is coaxially disposed within the movable portion; the receiving position is located between the first annular isolation portion and the movable portion. A second annular isolation portion is coaxially provided on the second baffle wall. The second annular isolation portion is inserted into the receiving position and abuts against the elastic structure.

7. The one-way valve according to claim 6, characterized in that, The through-hole structure includes: At least one second through hole is provided on the outer circumferential surface of the fitting part and communicates with the central hole of the first annular isolation part; At least one third through hole extends axially through the center of the second baffle; the third through hole is connected to the center hole of the first annular isolation part and the center hole of the second annular isolation part respectively.

8. The check valve according to claim 2 or 6, characterized in that, The defined structure includes: An annular protrusion is arranged coaxially with the movable part and sleeved on the outside of the movable part.

9. The one-way valve according to claim 1, characterized in that, The valve body includes: Inflow valve sleeve; the first baffle is located inside the inflow valve sleeve; An outflow valve sleeve is coaxially disposed on the outlet side of the inflow valve sleeve; the second baffle is located inside the outflow valve sleeve.

10. The one-way valve according to claim 9, characterized in that, The inflow valve sleeve and the first baffle are integrally formed, and the outflow valve sleeve and the second baffle are integrally formed.

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