One-way valve

Abstract

The invention discloses a one-way valve which comprises a valve body. The first retaining wall is arranged in the valve body and is provided with a flow limiting ring opening; the second retaining wall is arranged in the valve body; the second retaining wall and the first retaining wall are oppositely arranged and define an accommodating space; the limiting structure is arranged on the second blocking wall and located in the containing space; at least part of the through hole structure extends to the second retaining wall; the through hole structure is communicated with the accommodating space; the valve element is located in the containing space; a containing position with an opening is arranged on the side, close to the second blocking wall, of the valve element, and the limiting structure is arranged on the valve element in a sleeving mode and blocks the opening so as to seal the containing position. The through hole structure is positioned outside the accommodating position; one end of the elastic structure abuts against the valve element, and the other end of the elastic structure abuts against the second blocking wall; the elastic structure is in a compressed state; the elastic structure can stretch out and draw back in the axial direction and is used for driving the valve element to shield and open the flow limiting ring opening. The elastic structure is isolated from the through hole structure, fluid does not pass through the elastic structure, and valve element clamping stagnation caused by fluid corrosion is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid control devices, in particular to a one-way valve. BACKGROUND

[0002] The one-way valve is widely used in mechanical manufacturing, petroleum chemical industry and other fields as an important control element for realizing one-way flow of medium. Although the existing one-way valve has good sealing effect, the elastic element thereof is in an exposed state, so that the valve core is opened. When fluid passes through the one-way valve, the fluid will immerse the elastic element, and the elastic element will be subjected to fluid friction and corrosion for a long time. Especially when the elastic element is subjected to corrosion for a long time and is used to transport high-viscosity medium or fluid containing particulate impurities, the valve core is prone to jamming, thereby affecting the stability and reliability of the valve.

[0003] Therefore, the prior art still needs to be improved and developed. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a one-way valve to solve the problem of corrosion of the elastic element in the prior art.

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

[0006] A one-way valve comprises a valve body, which further comprises:

[0007] A first blocking wall is arranged in the valve body and has a flow limiting ring opening;

[0008] A second blocking wall is arranged in the valve body; the second blocking wall is arranged opposite to the first blocking wall and encloses a containing space;

[0009] A limiting structure is arranged on the second blocking wall and located in the containing space;

[0010] A through hole structure extends at least partially to the second blocking wall; the through hole structure is in communication with the containing space;

[0011] A valve core is located in the containing space; the valve core is provided with a containing site having an opening on the side close to the second blocking wall; the limiting structure is sleeved on the valve core and blocks the opening to seal the containing site; the through hole structure is located outside the containing site;

[0012] An elastic structure is located in the containing site and abuts against the valve core at one end and the second blocking wall at the other end; the elastic structure is in a compressed state; the elastic structure can be extended and retracted in the axial direction and is used to drive the valve core to shield and open the flow limiting ring opening.

[0013] The check valve, wherein the valve core comprises:

[0014] A moving part, one end of which is inserted into the defined structure and reciprocally moves along the axial direction relative to the defined structure; the accommodating position is located in the moving part and penetrates the moving part along the axial direction;

[0015] A fitting part, which is arranged at the end of the moving part outside the defined structure and corresponds to the orifice of the flow limiting ring; in the natural state, the fitting part is fitted with the first blocking wall to block the orifice of the flow limiting ring.

[0016] The check valve further comprises:

[0017] A supporting shaft, which is arranged on the second blocking wall and located in the defined structure; the supporting shaft has a gap with the defined structure, one end of the moving part away from the fitting part is inserted into the gap and in contact with the supporting shaft; the supporting shaft is in abutment with the elastic structure.

[0018] The check valve, wherein the through hole structure comprises:

[0019] At least one first through hole, which is arranged on the second blocking wall and located outside the defined structure.

[0020] The check valve, wherein the first through hole is a plurality of; the plurality of first through holes are arranged around the periphery of the defined structure.

[0021] The check valve, wherein the valve core further comprises:

[0022] A first annular isolation part, which is coaxially arranged in the moving part; the accommodating position is located between the first annular isolation part and the moving part;

[0023] A second annular isolation part is coaxially arranged on the second blocking wall, the second annular isolation part is inserted into the accommodating position and in abutment with the elastic structure.

[0024] The check valve, wherein the through hole structure comprises:

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

[0026] At least one third through hole, which penetrates the center of the second blocking wall along the axial direction; the third through hole respectively communicates with the center hole of the first annular isolation part and the center hole of the second annular isolation part.

[0027] The check valve, wherein the defined structure comprises:

[0028] A ring-shaped protrusion coaxially arranged with the moving part and sleeved on the moving part.

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

[0030] An inflow valve sleeve, wherein the first blocking wall is located in the inflow valve sleeve;

[0031] An outflow valve sleeve coaxially arranged at the outlet side of the inflow valve sleeve, wherein the second blocking wall is located in 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: the position of the through hole structure is changed, the fluid circulation path is changed, the elastic structure is protected, and the fluid no longer passes through the elastic structure in the valve body, thereby reducing or even avoiding the corrosion of the fluid on the elastic structure, especially when conveying high-viscosity medium or fluid containing particulate impurities, the problem of valve core jamming is avoided, thereby improving the stability and reliability of the valve. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is the overall cross-sectional view of the one-way valve in embodiment one of the present application;

[0035] Figure 2 is a partial structure schematic diagram of the valve body when the first through hole is one in embodiment one of the present application;

[0036] Figure 3 is a partial structure schematic diagram of the valve body when the first through hole is multiple in embodiment one of the present application;

[0037] Figure 4 is a partial structure cross-sectional view of the valve body when the first through hole is multiple in embodiment one of the present application;

[0038] Figure 5 is a partial exploded structure schematic diagram of the one-way valve when the first through hole is multiple in embodiment one of the present application;

[0039] Figure 6 is a cross-sectional view of the valve core in embodiment one of the present application;

[0040] Figure 7 is a distribution state schematic diagram of the flow limiting ring port in the valve body in the present application;

[0041] Figure 8 is the overall cross-sectional view of the one-way valve when the flow limiting ring port is opened in embodiment two of the present application;

[0042] Figure 9 is the overall cross-sectional view of the one-way valve when the flow limiting ring port is closed in embodiment two of the present application;

[0043] Figure 10 is an assembly diagram of the valve core and the limiting structure in the second embodiment of the present application;

[0044] Figure 11 is a partial structure diagram of the valve body in the second embodiment of the present application;

[0045] Figure 12 is a sectional view of the valve core in the second embodiment of the present application;

[0046] Figure 13 is a diagram showing the distribution state of the limiting structure and the second annular limiting portion in the valve body in the second embodiment of the present application;

[0047] Figure 14 is a partial exploded structure diagram of the one-way valve in the second embodiment of the present application. DETAILED DESCRIPTION

[0048] It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. It is further understood that the terms “comprising,” “including,” “containing,” and “having” and the like, when used in the specification, specify the presence of stated features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It is further understood that when we refer to an element being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. In addition, the use of “connection” or “coupling” herein also includes wireless connection or wireless coupling. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0049] It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. It is further understood that the terms “comprising,” “including,” “containing,” and “having” and the like, when used in the specification, specify the presence of stated features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It is further understood that when we refer to an element being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. In addition, the use of “connection” or “coupling” herein also includes wireless connection or wireless coupling. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0050] The inventor of the present application found that the one-way valve relies on the expansion and contraction of the elastic element to drive the valve core to move along the axial direction, so as to block and open the flow-restricting ring port through the valve core, thereby realizing the opening and closing of the one-way valve. However, the elastic element itself is in the fluid passage; when the one-way valve is opened, the fluid passes through from the valve body, which can immerse the elastic element, resulting in corrosion of the elastic element. After long-term corrosion of the elastic element, especially when transporting high-viscosity medium or fluid containing particulate impurities, the valve core is prone to jamming, thereby affecting the stability and reliability of the valve.

[0051] To solve the above technical problems, the present application provides a one-way valve, as shown in Figure 1 、 Figure 8 and Figure 9 , the one-way valve comprises a valve body 1, a first barrier wall 2, a second barrier wall 3, a limiting structure 4, a through-hole structure, a valve core 5 and an elastic structure 6; the first barrier wall 2 is arranged in the valve body 1 and has a flow-restricting ring port 20; the second barrier wall 3 is arranged in the valve body 1; the second barrier wall 3 is arranged opposite to the first barrier wall 2 and encloses a containing space 7 (as shown in Figure 1 and Figure 8 ); the limiting structure 4 is arranged on the second barrier wall 3 and located in the containing space 7; the through-hole structure extends at least partially to the second barrier wall 3; the through-hole structure is in communication with the containing space 7; the valve core 5 is located in the containing space 7; the valve core 5 is provided with a containing site 50 with an opening (as shown in Figure 5 and Figure 12 ) on the side close to the second barrier wall 3, the limiting structure 4 is sleeved on the valve core 5 and blocks the opening to seal the valve core 5; the through-hole structure is located outside the containing site 50; the elastic structure 6 is located in the containing site 50 and abuts against the valve core 5 at one end and the second barrier wall 3 at the other end; the elastic structure 6 is in a compressed state; the elastic structure 6 can expand and contract along the axial direction and is used to drive the valve core 5 to block and open the flow-restricting ring port 20.

[0052] Specifically, the valve body 1 is a cylinder, and the valve body 1 is used for accommodating the first barrier wall 2, the second barrier wall 3, the limiting structure 4, the valve core 5 and the elastic structure 6; the first barrier wall 2 and the second barrier wall 3 are arranged in parallel and opposite along the axial direction; along the flow direction of the fluid in the valve body 1, the second barrier wall 3 is located downstream of the first barrier wall 2. The valve core 5 and the limiting structure 4 are both located in the containing space 7; the valve core 5 is inserted into the limiting structure 4 near one side of the second barrier wall 3, and the opening of the containing site 50 is blocked by the limiting structure 4, so as to seal the containing site 50. The through-hole structure is located outside the containing site 50 and can communicate with the flow-restricting ring opening 20 through the containing space 7, and the elastic structure 6 can drive the valve core 5 to move along the axial direction through elastic expansion and contraction, so that the valve core 5 can block and open the flow-restricting ring opening 20; when the valve core 5 blocks the flow-restricting ring opening 20, the flow-restricting ring opening 20 is disconnected with the containing space 7, the through-hole structure and the flow-restricting ring opening 20 are closed, and the whole one-way valve is closed; when the valve core 5 opens the flow-restricting ring opening 20, the flow-restricting ring opening 20 is connected with the containing space 7, the through-hole structure and the flow-restricting ring opening 20 are opened, and the whole one-way valve is opened.

[0053] In this way, when the elastic structure 6 is assembled in the containing site 50, the elastic structure 6 can be isolated from the containing space 7 and the through-hole structure; when the fluid flows from the flow-restricting ring opening 20 to the second barrier wall 3, the valve core 5 is pushed to compress the elastic structure 6, the valve core 5 moves to the second barrier wall 3 and away from the first barrier wall 2, the flow-restricting ring opening 20 is opened, the flow-restricting ring opening 20 communicates with the through-hole structure through the containing space 7, and the fluid flows to the outside of the one-way valve through the containing space 7 and the through-hole structure without passing through the elastic structure 6. When the pushing force of the fluid on the valve core 5 to the second barrier wall 3 is not enough to resist the elastic deformation restoring force of the elastic structure 6, the elastic structure 6 restores the elastic deformation and holds the valve core 5 to move to the first barrier wall 2, until the valve core 5 is attached to the first barrier wall 2 and blocks the flow-restricting ring opening 20, the flow-restricting ring opening 20 is disconnected with the containing space 7, and the whole one-way valve is closed.

[0054] It can be seen that, by changing the position of the through-hole structure, the fluid flow path is changed, the elastic structure 6 is protected by the containing site 50, and the fluid no longer passes through the elastic structure 6 in the valve body 1, thereby reducing or even avoiding the corrosion of the fluid on the elastic structure 6, especially when conveying high-viscosity medium or fluid containing particulate impurities, the problem of valve core 5 sticking is avoided, thereby improving the stability and reliability of the valve.

[0055] It should be noted that the through hole structure and the accommodating space 7 are always in communication regardless of whether the flow limiting ring port 20 is blocked by the valve core 5. The elastic structure 6 is always in a compressed state; in a natural state (i.e., no fluid passes through the check valve), the elastic structure 6 generates an elastic deformation force due to compression to hold and support the valve core 5, so that the valve core 5 can block the flow limiting ring port 20, thereby ensuring that the check valve is in a normally closed state. The portion of the valve core 5 inserted into the limiting structure 4 is in contact with the inner wall of the limiting structure 4 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 accommodating site 50.

[0056] It can be understood that the first barrier wall 2 and the second barrier wall 3 are both circular, and the outer circumferential surfaces of both are completely fitted with the inner wall of the valve body 1, so as to ensure that the fluid can only pass through the flow limiting ring port 20 at the first barrier wall 2 and can only pass through the through hole structure at the second barrier wall 3.

[0057] In an embodiment of the present application, the first barrier wall 2 and the second barrier wall 3 are both flat cylindrical structures, and the flow limiting ring port 20 is located at the center of the first barrier wall 2; since the second barrier wall 3 needs to bear the limiting structure 4 and the valve core 5, the axial height of the second barrier wall 3 is greater than the axial height of the first barrier wall 2, so as to ensure that the second barrier wall 3 has a certain structural strength.

[0058] It can be understood that the diameter of the side of the valve core 5 close to the first barrier wall 2 is greater than the diameter of the flow limiting ring port 20, so as to ensure that the flow limiting ring port 20 can be completely blocked when the valve core 5 is fitted with the first barrier wall 2, thereby ensuring that the flow limiting ring port 20 is in a closed state.

[0059] In an embodiment of the present application, as shown in Figure 7 The side of the first barrier wall 2 away from the second barrier wall 3 is provided with an annular inclined portion 14 at the connection with the valve body 1, and the diameter of the annular inclined portion 14 gradually decreases along the flow direction of the fluid, so as to reduce the impact and turbulence of the fluid on the valve body 1. The junction between the annular inclined portion 14 and the first barrier wall 2 and the junction between the annular inclined portion 14 and the valve body 1 can both be chamfered.

[0060] In an embodiment of the present application,

[0061] As shown in Figures 1-6 The valve core 5 includes a moving portion 51 and a fitted portion 52; one end of the moving portion 51 is inserted into the limiting structure 4 and can reciprocate along the axial direction relative to the limiting structure 4; the accommodating site 50 is located in the moving portion 51 and penetrates the moving portion 51 along the axial direction; the fitted portion 52 is provided at the end of the moving portion 51 outside the limiting structure 4 and corresponds to the flow limiting ring port 20; in a natural state, the fitted portion 52 is fitted with the first barrier wall 2 to block the flow limiting ring port 20. The limiting structure 4 includes an annular protruding portion coaxially arranged with the moving portion 51 and sleeved outside the moving portion 51.

[0062] Specifically, the moving part 51 and the abutting part 52 are both cylindrical structures, and are coaxially connected; along the direction of fluid flow in the valve body 1, the moving part 51 is located downstream of the abutting part 52. The abutting part 52 is used to abut against the first barrier wall 2, thereby shielding the flow-restricting ring port 20; the end of the moving part 51 away from the abutting part 52 is inserted into the annular protruding part, so that the outer circumferential surface of the moving part 51 can overlap the annular protruding part.

[0063] In this embodiment, the accommodation site 50 is arranged extending from the axial end surface of the end of the moving part 51 away from the abutting part 52 towards the abutting part 52, and is located at the center of the moving part 51, forming a cylindrical accommodation space; the elastic structure 6 is located in the accommodation site 50 and in contact with 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 and movement of the elastic structure 6, ensuring that the movement of the valve core 5 is axial linear movement, reducing the deviation of the valve core 5.

[0064] It should be noted that in the natural state, the abutting part 52 abuts against the first barrier wall 2 and shields the flow-restricting ring port 20, and the moving part 51 does not contact the second barrier wall 3, but still remains partially located in the annular protruding part and does not detach from the annular protruding part, so as to ensure the sealing performance of the accommodation site 50. The elastic structure 6 and the abutting part 52, and the elastic structure 6 and the second barrier wall 3 can be connected by welding or other means; or are not connected, but only in contact with each other.

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

[0066] Specifically, the first through-hole 8 penetrates the second barrier wall 3 in the axial direction and connects the accommodation space 7 with the outside. The first through-hole 8 is located outside the annular protruding part, so that when the fluid enters the valve body 1 and impacts the valve core 5 through the flow-restricting ring port 20, the elastic structure 6 is further compressed to give way to the abutting part 52, and then the fluid enters the accommodation space 7 from the flow-restricting ring port 20, and then enters the first through-hole 8 from the accommodation space 7 and flows out of the valve body 1. Under the combined isolation effect of the valve core 5 and the annular protruding part on the elastic structure 6, the fluid does not contact the elastic structure 6, but passes from the outside of the valve core 5.

[0067] In one embodiment of this embodiment, as shown in Figure 2 , the first through-hole 8 is one and located at the periphery of the annular protruding part.

[0068] In another embodiment of this embodiment, as shown in Figure 3 , Figure 4 andFigure 5 As shown, the first through hole 8 is multiple, multiple first through hole 8 is arranged along the outer periphery of the annular protruding part, and is uniformly distributed, so that the multiple first through hole 8 forms a central symmetric geometric condition on the outer periphery of the annular protruding part, reduces the eccentric pressure on the valve core 5, thereby prolonging the service life of the one-way valve.

[0069] It can be understood that the one-way valve is used to control the delivery of fluid, and by designing the aperture of the first through hole 8, different properties of fluid can be adapted. For example, the aperture of the first through hole 8 is designed to be 10mm, which can make the cement mortar pass through the one-way valve smoothly without blocking phenomenon. Correspondingly, by increasing the number of first through hole 8, the delivery flow of cement mortar can be improved.

[0070] Based on the embodiment, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the one-way valve further comprises a support shaft 9, which is arranged on the second barrier wall 3 and located in the limiting structure 4; the support shaft 9 has a gap 10 with the limiting structure 4, one end of the moving part 51 away from the abutting part 52 is inserted into the gap 10 and in contact with the support shaft 9; the support shaft 9 is in abutment with the elastic structure 6.

[0071] Specifically, the support shaft 9 is arranged on the side of the second barrier wall 3 close to the first barrier wall 2 and coaxially arranged with the annular protruding part; the diameter of the support shaft 9 is smaller than the inner diameter of the annular protruding part, so as to ensure that the gap 10 is formed between the support shaft 9 and the annular protruding part. One end of the support shaft 9 away from the second barrier wall 3 is inserted into the accommodating position 50, so that one end of the moving part 51 away from the abutting part 52 can be inserted into the gap 10; that is, the gap 10 between the support shaft 9 and the annular protruding part forms a clamping space to clamp the moving part 51, which increases the strength of the valve core 5 supported on the second barrier wall 3 and increases the guidance of the axial reciprocating movement of the valve core 5, further improves the axial linear movement of the valve core 5 to ensure that the flow limiting ring port 20 can be blocked without deviating from the accuracy of the flow limiting ring port 20. The outer circumferential surface of the moving part 51 is in contact with the inner wall of the annular protruding part, and the inner wall of the moving part 51 is in contact with the outer circumferential surface of the support shaft 9, so as to ensure that the accommodating position 50 can be sealed.

[0072] At the same time, in addition to being closed by the annular protruding part, the opening of the accommodating position 50 and the accommodating space 7 are also increased by the barrier of the support shaft 9, so that even if the moving part 51 or the annular protruding part is worn due to long-term use, the fluid entering between the annular protruding part and the moving part 51 will be hindered by the contact between the support shaft 9 and the moving part 51, and it is difficult to enter the accommodating position 50, thereby improving the sealing performance of the accommodating position 50.

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

[0074] Embodiment two in the present application

[0075] As shown in Figure 8 , Figure 9 and Figure 12 , the valve core 5 includes a moving part 51, a fitting part 52 and a first annular isolation part 53; one end of the moving part 51 is inserted into the limiting structure 4 and can reciprocate axially relative to the limiting structure 4; the fitting part 52 is arranged at the end of the moving part 51 outside the limiting structure 4 and corresponds to the flow limiting ring port 20; in the natural state, the fitting part 52 is in close contact with the first barrier wall 2 to block the flow limiting ring port 20. The first annular isolation part 53 is coaxially arranged in the moving part 51; the accommodation site 50 is located between the first annular isolation part 53 and the moving part 51. As shown in Figure 8 , Figure 9 , Figure 11 and Figure 13 , the second barrier wall 3 is coaxially provided with a second annular isolation part 11, which is inserted into the accommodation site 50 and abuts against the elastic structure 6; the limiting structure 4 includes an annular protruding part, which is coaxially arranged with the moving part 51 and is sleeved outside the moving part 51.

[0076] The elastic structure 6 is a cylindrical elastic structure 6, and the elastic structure 6, the moving part 51 and the first annular isolation part 53 are coaxially arranged, and the elastic structure 6, the first annular isolation part 53 and the moving part 51 all have central holes; the first annular isolation part 53 is located in the central hole of the elastic structure 6, and the elastic structure 6 and the first annular isolation part 53 are both located in the central hole of the moving part 51, so that the first annular isolation part 53, the elastic structure 6 and the moving part 51 form a sleeve structure one inside the other. The first annular isolation part 53 is connected with the fitting part 52, and the accommodation site 50 is formed between the outer circumferential surface of the first annular isolation part 53 and the inner wall of the moving part 51 to accommodate the elastic structure 6.

[0077] In the present embodiment, the first annular isolation part 53 is arranged in the moving part 51, further reducing the accommodation space of the elastic structure 6, and through the enclosing and limiting action 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 when elastically stretching and contracting is further improved, the movement of the valve core 5 is ensured to be axial linear movement, and the deviation of the valve core 5 is reduced.

[0078] The second annular isolation portion 11 is arranged at the center of the second barrier wall 3, the diameter of the second annular isolation portion 11 is smaller than the diameter of the annular protruding portion, and a gap is reserved therebetween; one end of the second annular isolation portion 11 away from the second barrier wall 3 is inserted between the moving portion 51 and the first annular isolation portion 53 (i.e. inserted into the accommodating position 50), so that the opening between the moving portion 51 and the first annular isolation portion 53 can be blocked by the second annular isolation portion 11, thereby forming a sealed accommodating position 50. When the abutting portion 52 abuts against the first barrier wall 2, and the moving portion 51 and the first annular isolation portion 53 are both separated from the second barrier wall 3 (as shown in Figure 9 ), the second annular isolation portion 11 partially overlaps with the moving portion 51 and the first annular isolation portion 53, and the moving portion 51 also partially overlaps with the annular protruding portion, thereby ensuring the airtightness of the accommodating position 50 and preventing the fluid from entering the accommodating position 50 to contact the elastic structure 6.

[0079] Based on the embodiment, the through-hole structure includes at least one second through-hole 12 (as shown in Figure 8 , Figure 9 , Figure 10 , Figure 12 and Figure 14 ) and at least one third through-hole 13 (as shown in Figure 8 , Figure 9 , Figure 11 , Figure 13 and Figure 14 ); the second through-hole 12 is arranged on the outer circumferential surface of the abutting portion 52 and communicates with the central hole of the first annular isolation portion 53; the third through-hole 13 penetrates the center of the second barrier wall 3 in the axial direction; and the third through-hole 13 respectively communicates with the central hole of the first annular isolation portion 53 and the central hole of the second annular isolation portion 11.

[0080] Specifically, the through-hole structure is partially arranged on the second barrier wall 3 and partially arranged on the valve core 5, but still does not pass through the elastic structure 6, so as to ensure that the fluid does not contact the elastic structure 6. The second through-hole 12 is arranged along the radial direction of the abutting portion 52 and extends from the outer circumferential surface of the abutting portion 52 towards the center of the abutting portion 52; one end of the second through-hole 12 away from the outer circumferential surface of the abutting portion 52 also penetrates the abutting portion 52 and communicates with the central hole of the first annular isolation portion 53. The third through-hole 13 is arranged at the center of the second barrier 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 action 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 are in communication with each other, the first annular isolation portion 53 and the second annular isolation portion 11 isolate the elastic structure 6 from the fluid from the inner side of the elastic structure 6, and the moving portion 51 is isolated from the fluid from the outer side of the elastic structure 6.

[0081] When the fluid enters the valve body 1 and impacts the valve core 5 through the flow-restricting ring port 20, the elastic structure 6 is further compressed to give way to the abutting part 52, the flow-restricting ring port 20 is opened (as shown in Figure 8 ), the fluid enters the containing space 7 from the flow-restricting ring port 20, and then enters the second through hole 12, the center hole of the first annular isolation part 53, the center hole of the second annular isolation part 11, and the third through hole 13 in sequence from the containing space 7, and finally flows out of the valve body 1. Under the surrounding and isolation effect of the first annular isolation part 53, the second annular isolation part 11, and the annular protruding part on the elastic structure 6, although the fluid enters the inside of the valve core 5, it does not contact the elastic structure 6, but passes outside the elastic structure 6.

[0082] Based on the first or second embodiment, the elastic structure 6 includes a spring. By arranging the spring in the containing position 50, the spring's own elastic performance can also achieve buffering, further avoiding the impact on the valve body 1 when the valve body 1 is passed through by the pulsating fluid, thereby reducing the damage to the check valve.

[0083] Based on the first or second embodiment, the side of the abutting part 52 used to contact the first barrier wall 2 is a plane or a spherical surface. When the side of the abutting part 52 used to contact the first barrier wall 2 is a spherical surface (as shown in Figure 6 ), the first barrier wall 2 at the flow-restricting ring port 20 can be chamfered to increase the contact area between the flow-restricting ring port 20 and the abutting part 52, so that the two are more closely abutted, and the shielding and sealing effect of the valve core 5 on the flow-restricting ring port 20 is improved.

[0084] Based on the first or second embodiment, the material of the valve core 5 can be changed according to the fluid. For example, special alloy materials or polyether ether ketone materials are used to transport special fluids, reducing the corrosion of the valve core 5 by the special fluids and prolonging the service life of the valve core 5; or the abutting part 52 is made of wear-resistant alloy material (such as titanium alloy abutting part 52), reducing the wear of the abutting part 52 when the abutting part 52 cooperates with the first barrier wall 2 to shield the flow-restricting ring port 20, thereby prolonging the service life of the valve core 5.

[0085] Based on the first or second embodiment, the check valve in this application can meet the small size requirement of special working conditions and be suitable for different application scenarios. The diameter of the check valve is 15mm-20mm, and the axial height of the check valve is 20mm-25mm.

[0086] Based on the first or second embodiment, as shown in Figure 1 , Figure 5 , Figure 8 and Figure 14As shown, the valve body 1 comprises an inflow valve sleeve 101 and an outflow valve sleeve 102; the first baffle wall 2 is located in the inflow valve sleeve 101; the outflow valve sleeve 102 is coaxially arranged at the outlet side of the inflow valve sleeve 101; and the second baffle wall 3 is located in the outflow valve sleeve 102.

[0087] If the valve body 1 is integrally machined, the internal structure is difficult to machine; in the present application, the inflow valve sleeve 101 and the outflow valve sleeve 102 are in a split structure, and the inflow valve sleeve 101 and the outflow valve sleeve 102 are independently machined, and then assembled, so that the process is simple, and the precision is easier to guarantee. Moreover, the inflow valve sleeve 101 and the outflow valve sleeve 102 adopt a split structure, which facilitates the installation of the valve core 5 and the elastic structure 6 and other internal elements, and facilitates the replacement or maintenance of parts in the later period, thereby avoiding overall scrapping.

[0088] The inflow valve sleeve 101 and the first baffle wall 2 are in an integral molding structure, so as to improve the stability of the combination between the first baffle wall 2 and the inflow valve sleeve 101; and the outflow valve sleeve 102 and the second baffle wall 3 are in an integral molding structure, so as to improve the stability of the combination between the second baffle wall 3 and the outflow valve sleeve 102.

[0089] In summary, the present application provides a one-way valve, which comprises a valve body; a first baffle wall arranged in the valve body and provided with a flow-restricting ring opening; a second baffle wall arranged in the valve body; the second baffle wall is arranged opposite to the first baffle wall and encloses a containing space; a limiting structure arranged on the second baffle wall and located in the containing space; a through-hole structure at least partially extending to the second baffle wall; the through-hole structure is in communication with the containing space; a valve core located in the containing space; the side of the valve core close to the second baffle wall is provided with a containing site with an opening; the limiting structure is sleeved on the valve core and blocks the opening to seal the containing site; the through-hole structure is located outside the containing site; an elastic structure located in the containing site and abutting against the valve core at one end and the second baffle wall at the other end; the elastic structure is in a compressed state; the elastic structure can stretch and contract in the axial direction and is used to drive the valve core to shield and open the flow-restricting ring opening. The present application changes the position of the through-hole structure, changes the flow path of the fluid, protects the elastic structure by the containing site, and the fluid no longer passes through the elastic structure in the valve body, thereby reducing or even avoiding the corrosion of the fluid to the elastic structure, especially when conveying high-viscosity medium or fluid containing particulate impurities, the problem of valve core jamming is avoided, thereby improving the stability and reliability of the valve.

[0090] It should be understood that the application of the present application is not limited to the above examples, and those of ordinary skill in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the present application.

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 one-way 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.

Images