one-way valve

Abstract

This application relates to a one-way valve, which includes a valve body, a valve seat, a guide member, and a valve core. The valve body has a valve cavity, and the guide member and the valve seat are spaced apart within the valve cavity. The guide member and the valve seat are fixedly connected to the valve body, and the valve seat has a valve port. The valve core has a sleeve portion and an end head connected to each other. The sleeve portion is movably fitted onto the guide member, and the end head is used to open or close the valve port. The wall thickness of the end head is greater than the wall thickness of the sleeve portion, and the end head is used to abut against a pressing tool to press the valve port tightly under the action of the pressing tool. The one-way valve provided by this application can solve the problem that the valve core is easily damaged by pressing the valve port during operation.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a check valve. Background Technology

[0002] With the development of stainless steel in refrigeration and air conditioning, the market share of stainless steel products is experiencing explosive growth. However, most connections between stainless steel products and pipelines require welding with copper sleeves. Some simpler products, such as check valves and silencers, can be directly connected to stainless steel pipes and stainless steel products in tunnel furnaces, eliminating the need for copper sleeve welding. When the valve core and valve port of a check valve are made of stainless steel, there is a hard seal between them, thus requiring valve port depressurization.

[0003] Valve orifice pressing operation refers to inserting a valve orifice pressing tool into the valve core. The tool applies a force towards the valve orifice, causing the valve core to press against the orifice, thus improving the sealing effect by allowing the valve core and orifice to fit together better. However, during valve orifice pressing operation, the parts where the valve core mates with the tool, and the parts where the valve core mates with the orifice, are subjected to significant forces, making them susceptible to damage. Utility Model Content

[0004] Therefore, it is necessary to provide a one-way valve to solve the problem that the valve core is easily damaged by pressure when operating the valve port.

[0005] A one-way valve includes a valve body, a valve seat, a guide member, and a valve core. The valve body has a valve cavity, and the guide member and the valve seat are spaced apart within the valve cavity. The guide member and the valve seat are respectively fixedly connected to the valve body, and the valve seat has a valve port. The valve core has a sleeve portion and an end head connected to each other. The sleeve portion is movably sleeved on the guide member, and the end head is used to open or close the valve port. The wall thickness of the end head is greater than the wall thickness of the sleeve portion, and the end head is used to abut against a pressing tool to press the valve port under the action of the pressing tool.

[0006] In one embodiment, the inner wall of the end head has a protrusion with a pressing surface. The pressing surface is positioned away from the valve port and is designed to fit against a pressing tool, allowing the pressing tool to apply a force towards the valve port to the valve core. Understandably, this configuration provides a force-bearing surface for the pressing tool through the pressing surface, thereby increasing not only the force-bearing area of ​​the end head but also the thickness of the contact area between the end head and the pressing tool, thus preventing damage to the valve core.

[0007] In one embodiment, the protrusion is annular, extending around the axis of the valve core, and the end face of the protrusion facing away from the valve port forms a press-fit surface. It is understood that this arrangement results in more even force distribution on the end head along the circumference of the valve core.

[0008] In one embodiment, the cross-sectional area of ​​the end head gradually increases along the direction from the end head to the sleeve portion.

[0009] In one embodiment, a protrusion is disposed on the end head adjacent to the sleeve portion, and along the radial direction of the valve core, one end of the protrusion is connected to the sleeve portion, and the other end extends toward the axis of the valve core. It is understood that this arrangement not only improves the structural strength of the position adjacent to the end head, preventing deformation under stress, but also creates a stepped structure between the inner wall of the sleeve portion and the pressing surface on the protrusion, facilitating the insertion of the pressing tool into the valve core and rapid positioning of the protrusion.

[0010] In one embodiment, the pressing surface extends radially along the valve core, and the width of the pressing surface along the radial direction of the valve core is L, where 0.5mm < L < 0.7mm. It is understood that this arrangement ensures that the pressing surface provides a force-bearing surface for the pressing tool and avoids increasing the self-weight of the valve core.

[0011] In one embodiment, the wall thickness of the sleeve portion is ,and, <0.5mm. Understandably, this setting helps reduce the weight of the valve core, thus making it easier to open the valve port.

[0012] In one embodiment, the minimum wall thickness of the end cap is Furthermore, 1mm < <1.5mm. Understandably, this setting ensures that the wall thickness of the end head is greater than that of the sleeve part, while preventing the end head from becoming too thick.

[0013] In one embodiment, the end head closes the valve port by abutting against the edge of the valve port. The position where the end head abuts against the edge of the valve port is defined as the abutment position, and the thickness of the end head at the abutment position is... 1.2mm < <1.7mm. Understandably, this setting helps ensure that the end head is not easily deformed when subjected to force at the contact point.

[0014] In one embodiment, the guide includes a support retaining ring and a guide portion, the support retaining ring being fixedly connected to the valve body, the guide portion being connected to the support retaining ring, and the sleeve portion being movably sleeved on the guide portion.

[0015] Compared with the prior art, the one-way valve provided in this application has a sleeve portion that is movably sleeved on the guide member, and an end head that is used to abut against the pressing tool to press the valve port under the action of the pressing tool. That is, the end head is used to directly bear the force applied by the pressing tool toward the valve port. The force borne by the end head is much greater than that of the sleeve portion. Therefore, by making the wall thickness of the end head greater than that of the sleeve portion, the end head's resistance to deformation is improved and it is prevented from being crushed, while the self-weight of the valve core can be reduced as much as possible. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A cross-sectional view of the check valve provided in this application;

[0018] Figure 2 for Figure 1 An enlarged view at point A;

[0019] Figure 3 A cross-sectional view of the valve core provided in this application.

[0020] Reference numerals: 100, check valve; 110, valve body; 111, valve cavity; 120, valve seat; 121, valve port; 130, guide member; 131, support retaining ring; 132, guide part; 140, valve core; 141, sleeve part; 142, end head; 143, protrusion; 1431, press-fit surface; 144, abutment position. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0026] Please see Figures 1 to 3This application provides a one-way valve 100, which includes a valve body 110, a valve seat 120, a guide member 130, and a valve core 140. The valve body 110 has a valve cavity 111. The guide member 130 and the valve seat 120 are spaced apart within the valve cavity 111, and the guide member 130 and the valve seat 120 are respectively fixedly connected to the valve body 110. The valve seat 120 has a valve port 121. The valve core 140 has a sleeve portion 141 and an end head 142 connected to each other. The sleeve portion 141 is movably sleeved on the guide member 130. The end head 142 is used to open or close the valve port 121, and is used to abut against a pressing tool to press the valve port 121 under the action of the pressing tool. The wall thickness of the end head 142 is greater than the wall thickness of the sleeve portion 141. The sleeve portion 141 and the end head 142 are connected to each other and integrally formed.

[0027] It is understandable that since the sleeve portion 141 is used to be movably sleeved on the guide member 130, and the end head 142 is used to abut against the pressing tool to press the valve port 121 under the action of the pressing tool, that is, the end head 142 is used to directly bear the force applied by the pressing tool toward the valve port. The force borne by the end head 142 is much greater than that of the sleeve portion 141. Therefore, by making the wall thickness of the end head 142 greater than the wall thickness of the sleeve portion 141, the end head 142 can be made more resistant to deformation and prevented from being crushed, while also minimizing the weight of the valve core 140.

[0028] Specifically, both the sleeve portion 141 and the end head 142 are hollow structures. The sleeve portion 141 is cylindrical, and the end head 142 is connected to the end of the sleeve portion 141 near the valve port 121. Along the direction from the end head 142 to the sleeve portion 141, the cross-sectional area of ​​the end head 142 gradually increases. That is, the end head 142 is conical. When performing the valve port pressing operation on the valve core 140, a pressing tool is inserted into the valve core 140 from the end of the sleeve portion 141 away from the end head 142.

[0029] Furthermore, such as Figure 2 and Figure 3 As shown, the inner wall of the end head 142 is provided with a protrusion 143, which has a pressing surface 1431. The pressing surface 1431 is disposed away from the valve port 121 and is used to fit with the pressing tool so that the pressing tool can apply a force to the valve core 140 pointing towards the valve port 121 on the pressing surface 1431. It can be understood that the protrusion 143 provides a force-bearing plane for the pressing tool through the pressing surface 1431, thereby not only increasing the force-bearing area of ​​the end head 142, but also increasing the thickness of the contact position between the end head 142 and the pressing tool, thus preventing the valve core 140 from being crushed.

[0030] Specifically, the operation process of pressing the valve port 121 of the one-way valve 100 is as follows: First, the pressing tool is inserted into the valve core 140 from the end of the sleeve portion 141 away from the end head 142. Then, the pressing tool is made to abut against the pressing surface 1431. Next, the pressing tool is used to apply a force pointing towards the valve port 121, so that the end head 142 presses the valve port 121.

[0031] Optionally, in one embodiment, the protrusion 143 is annular, extending around the axis of the valve core 140, and the end face of the protrusion 143 facing away from the valve port 121 forms a press-fit surface 1431. This makes the end head 142 more evenly stressed along the circumference of the valve core 140.

[0032] Of course, in other embodiments, the protrusion 143 may also be configured to include a plurality of independent protrusions, the plurality of protrusions being distributed at intervals around the axis of the valve core 140, and each protrusion forming a sub-face body, the plurality of sub-face bodies together constituting the press-fit surface 1431.

[0033] A protrusion 143 is disposed on the end head 142 adjacent to the sleeve portion 141. Along the radial direction of the valve core 140, one end of the protrusion 143 connects to the sleeve portion 141, and the other end extends towards the axis of the valve core 140. This not only improves the structural strength of the junction between the sleeve portion 141 and the end head 142, preventing deformation under stress, but also creates a stepped structure between the inner wall of the sleeve portion 141 and the pressing surface 1431 on the protrusion 143, facilitating the insertion of a pressing tool into the valve core 140 and quick positioning of the protrusion 143.

[0034] Furthermore, the pressing surface 1431 extends radially along the valve core 140, and the width of the pressing surface 1431 along the radial direction of the valve core 140 is L, where 0.5mm < L < 0.7mm. It is understandable that if L is too small, the pressing surface 1431 will be unable to provide a force-bearing surface for the pressing tool; if L is too large, the volume of the protrusion 143 will also need to be correspondingly large, which will increase the self-weight of the valve core 140, making it difficult for the valve core 140 to overcome its own weight and open the valve port 121. For example, the value of L can be 0.55mm, 0.56mm, 0.56mm, 0.55mm, 0.6mm, etc., and can be selected according to actual needs, as long as it is within the above range.

[0035] In one embodiment, the wall thickness of the sleeve portion 141 is ,and, <0.5mm. It is understandable that since the sleeve portion 141 is only used to be movably sleeved on the guide member 130 and does not directly bear the force applied towards the valve port by the pressing tool, the wall thickness of the sleeve portion 141 can be set to be thinner. The thinner the wall thickness of the sleeve portion 141, the more beneficial it is to reduce the weight of the valve core 140, thereby facilitating the opening of the valve port 121.

[0036] In one embodiment, the wall thickness at different locations of the end head 142 is configured to be unequal, and the minimum wall thickness of the end head 142 is... Furthermore, 1mm < <1.5mm. This ensures that the wall thickness of the end portion 142 is greater than the wall thickness of the sleeve portion 141, while preventing the end portion 142 from becoming excessively thick. For example, The values ​​can be 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.45mm, etc. The specific value can be set according to actual needs, as long as it is within the above range. They will not be listed one by one here.

[0037] For example, in one embodiment, the protrusion 143 is disposed on the end head 142 adjacent to the sleeve portion 141, and along the radial direction of the valve core 140, one end of the protrusion 143 is connected to the sleeve portion 141, and the other end extends toward the axis of the valve core 140. The junction of the end of the protrusion 143 along the axial direction of the valve core 140 near the valve port 121 and the inner wall of the end head 142 is the position of minimum wall thickness of the end head 142.

[0038] The end head 142 closes the valve port 121 by abutting against the edge of the valve port 121. The position of the end head 142 for abutting against the edge of the valve port 121 is defined as the abutment position 144, and the thickness of the end head 142 at the abutment position 144 is... 1.2mm < <1.7mm. It is understandable that the abutment position 144 is the force-bearing position where the end head 142 abuts against the valve port 121, therefore a minimum of 1.2mm is set. <1.7mm, which helps ensure that the end head 142 is not easily deformed when subjected to force at the contact point 144. For example, The value can be 1.21mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm or 1.69mm, etc., and can be selected according to actual needs. They will not be listed here.

[0039] The guide member 130 includes a support retaining ring 131 and a guide portion 132. The support retaining ring 131 is fixedly connected to the valve body 110, the guide portion 132 is connected to the support retaining ring 131, and the sleeve portion 141 is movably sleeved on the guide portion 132. The support retaining ring 131 can be fixed to the valve body 110 by welding.

[0040] When the one-way valve 100 provided in this application is in operation, it is usually placed vertically. The valve core 140 closes the valve port 121 under its own weight. When opening the valve, it is necessary to overcome the gravity of the valve core 140 so that the valve core 140 moves along the guide part 132 to open the valve port 121.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0042] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A one-way valve characterized by, The one-way valve includes a valve body (110), a valve seat (120), a guide (130), and a valve core (140). The valve body (110) has a valve cavity (111). The guide (130) and the valve seat (120) are spaced apart in the valve cavity (111), and the guide (130) and the valve seat (120) are respectively fixedly connected to the valve body (110). The valve seat (120) has a valve port (121). The valve core (140) has a sleeve portion (141) and an end head (142) connected to each other. The sleeve portion (141) is movably sleeved on the guide member (130). The end head (142) is used to open or close the valve port (121). The wall thickness of the end head (142) is greater than the wall thickness of the sleeve portion (141). The end head (142) is used to abut against the pressing tool to press the valve port (121) under the action of the pressing tool.

2. The one-way valve of claim 1, wherein The inner wall of the end head (142) is provided with a protrusion (143), the protrusion (143) has a pressing surface (1431), the pressing surface (1431) is disposed away from the valve port (121), and the pressing surface (1431) is used to fit with the pressing tool so that the pressing tool can apply a force to the valve core (140) pointing towards the valve port (121) on the pressing surface (1431).

3. The one-way valve of claim 2, wherein, The protrusion (143) is an annular shape extending around the axis of the valve core (140), and the end face of the protrusion (143) opposite to the valve port (121) constitutes the press-fit surface (1431).

4. The one-way valve according to claim 2, characterized in that, Along the direction from the end head (142) to the sleeve portion (141), the cross-sectional area of ​​the end head (142) gradually increases.

5. The one-way valve of claim 4, wherein, The protrusion (143) is disposed on the end head (142) adjacent to the sleeve portion (141), and along the radial direction of the valve core (140), one end of the protrusion (143) is connected to the sleeve portion (141), and the other end extends toward the axis of the valve core (140).

6. The one-way valve of claim 5, wherein, The press-fit surface (1431) extends radially along the valve core (140), and the width of the press-fit surface (1431) radially along the valve core (140) is L, and 0.5mm < L < 0.7mm.

7. The one-way valve of claim 1, wherein The wall thickness of the sleeve portion (141) is and, <0.5 mm.

8. The one-way valve of claim 1, wherein, The minimum wall thickness of the tip portion (142) is and 1 mm < d < 1.5 mm. < 1.5 mm.

9. The one-way valve of claim 1, wherein, The end head (142) closes the valve port (121) by abutting against the edge of the valve port (121). The position where the end head (142) abuts against the edge of the valve port (121) is defined as the abutment position (144), and the thickness of the end head (142) at the abutment position (144) is... 1.2mm < <1.7mm.

10. The one-way valve of claim 1, wherein, The guide member (130) includes a support retaining ring (131) and a guide portion (132). The support retaining ring (131) is fixedly connected to the valve body (110), the guide portion (132) is connected to the support retaining ring (131), and the sleeve portion (141) is movably sleeved on the guide portion (132).

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