one-way valve

Abstract

The application relates to a one-way valve, which comprises a valve body, a valve seat, a guide piece and a valve core, the valve body is provided with a valve cavity, the guide piece and the valve seat are arranged in the valve cavity in a spaced mode, and the guide piece and the valve seat are fixedly connected with the valve body respectively, the valve seat is provided with a guide section and a valve port section, the valve port section is provided with a valve port, and the guide section is located on the side of the valve port section facing the guide piece; one end of the valve core is movably connected with the guide piece, the other end is used for moving towards the direction close to or far away from the valve port, so as to close or open the valve port, and at least part of the outer wall of the valve core can slide along the inner wall of the guide section in the process of the movement of the valve core. The one-way valve provided by the application is beneficial to guaranteeing the coaxial degree of the valve core and the valve port by arranging the guide section on the valve seat, so as to avoid the problem that the leakage at the valve port is increased.

Description

Technical Field

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

[0002] One-way valves are commonly used in refrigeration and air conditioning systems. A one-way valve mainly consists of a valve body, valve seat, valve core, and guide component. The guide component and valve seat are installed inside the valve body. One end of the valve core is movably connected to the guide component, and the other end is used to open or close the valve port. The valve core guides the valve core in opening and closing the valve through the cooperation of the guide component. However, when the guide length between the valve core and the guide component is short, or when there is a gap between the valve core and the guide component, the valve core is prone to misalignment, affecting the coaxiality of the valve core and the valve port, thus leading to increased leakage at the valve port. Utility Model Content

[0003] Therefore, it is necessary to provide a one-way valve to solve the problem that the valve core is prone to misalignment, which affects the coaxiality of the valve core and the valve port, and thus leads to increased leakage at the valve port.

[0004] 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. The valve seat has a guide section and a valve port section. The valve port section has a valve port, and the guide section is located on the side of the valve port section facing the guide member. One end of the valve core is movably connected to the guide member, and the other end is used to move towards or away from the valve port to close or open the valve port. During the movement of the valve core, at least a portion of the outer wall of the valve core can slide along the inner wall of the guide section.

[0005] In one embodiment, the valve core has a sleeve portion and an end head. One end of the sleeve portion is movably sleeved on the guide member, and the other end is used to slide along the inner wall of the guide section. The end head is located at the end of the sleeve portion near the valve port, and the end head is used to close or open the valve port.

[0006] In one embodiment, when the valve port is closed at the end, the sleeve and guide are interlocked along the valve core for a length of [length missing]. And 3mm < .

[0007] In one embodiment, the inner wall shape of the guide section is adapted to the outer wall shape of the sleeve portion, and the length of the inner wall of the guide section along the valve core axial direction is... And 1mm < .

[0008] In one embodiment, the outer diameter of the end head gradually increases along the direction from the end head to the sleeve portion.

[0009] In one embodiment, the valve seat further has an inlet section located on the side of the guide section opposite to the valve port section. The inlet section has a tapered guide surface with a large end and a small end. The small end is connected to the inner wall of the guide section, and the large end is oriented toward the guide member.

[0010] In one embodiment, the outer wall of the valve seat is welded and fixed to the valve body. The valve seat has a first end face and a second end face at both ends along the valve port axial direction. The first end face is disposed facing the guide member, and the second end face is disposed away from the guide member. A first overflow groove is formed on the first end face; and / or, a second overflow groove is formed on the second end face.

[0011] In one embodiment, the first overflow channel has a first bottom wall and two first side walls, the two first side walls being respectively arranged radially around both ends of the first bottom wall along the valve port, and the depth of the first overflow channel is [missing information]. And 0.5mm < <1mm.

[0012] In one embodiment, the second overflow channel has a second bottom wall and a second side wall, one end of the second bottom wall being connected to the second side wall, and the other end extending radially along the valve port to the outer side wall of the valve seat; the width of the second bottom wall extending radially along the valve port is... And 0.5mm < <0.8mm.

[0013] In one embodiment, the first overflow groove is configured as an annular groove and extends about the axis of the valve port; and / or, the second overflow groove is configured as an annular groove and extends about the axis of the valve port.

[0014] In one embodiment, the outer wall of the valve seat is provided with a receiving groove for placing solder, and the valve seat is welded to the valve body by the solder in the receiving groove.

[0015] Compared with the prior art, the one-way valve provided in this application, by setting a guide section on the valve seat, with the guide section located on the side of the valve port facing the guide member, allows at least a portion of the outer wall of the valve core to slide along the inner wall of the guide section during valve core movement. This enables the guide section to guide the valve core by engaging with at least a portion of the outer wall of the valve core. In other words, the one-way valve provided in this application guides the valve core movement in two ways: one part guides the valve core to the guide member, and the other part guides the valve core to the guide section. Thus, even if the guide length between the valve core and the guide member is short, the guide length for the valve core can be guaranteed. Alternatively, even if there is a gap between the valve core and the guide member, causing a slight misalignment of the valve core, the guide section can still correct the valve core after it enters the guide section, thereby helping to ensure the coaxiality of the valve core and the valve port and avoiding increased leakage at the valve port. 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 when the valve port is closed;

[0018] Figure 2 A cross-sectional view of the valve seat provided in this application.

[0019] Reference numerals: 100, one-way valve; 110, valve body; 111, valve cavity; 120, valve seat; 1201, guide section; 1202, valve port section; 1203, inlet section; 121, valve port; 122, guide surface; 1221, large end; 1222, small end; 123, receiving groove; 124, first end face; 1241, first overflow groove; 1242, first bottom wall; 1243, first side wall; 125, second end face; 1251, second overflow groove; 1252, second bottom wall; 1253, second side wall; 130, guide member; 140, valve core; 141, sleeve part; 142, end head. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Please see Figure 1 and Figure 2 This 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 in 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 guide section 1201 and a valve port section 1202. The valve port section 1202 has a valve port 121. The guide section 1201 is located on the side of the valve port section 1202 facing the guide member 130. One end of the valve core 140 is movably connected to the guide member 130, and the other end is used to move toward or away from the valve port 121 to close or open the valve port 121. During the movement of the valve core 140, at least a portion of the outer wall of the valve core 140 can slide along the inner wall of the guide section 1201.

[0026] It is understood that by providing a guide section 1201 on the valve seat 120, with the guide section 1201 located on the side of the valve port section 1202 facing the guide member 130, and by allowing at least a portion of the outer wall of the valve core 140 to slide along the inner wall of the guide section 1201 during the movement of the valve core 140, the guide section 1201 can guide the valve core 140 by engaging with at least a portion of the outer wall of the valve core 140. In other words, the one-way valve 100 provided in this application guides the movement of the valve core 140 in two ways: one part is the guidance between the valve core 140 and the guide member 130, and the other part is the guidance between the valve core 140 and the guide section 1201. Thus, even if the guiding length between the valve core 140 and the guide member 130 is short, the guiding length of the valve core 140 can be guaranteed. Alternatively, even if there is a gap between the valve core 140 and the guide member 130, causing a slight deviation of the valve core 140, the guide section 1201 can still correct the valve core 140 after it enters the guide section 1201, thereby helping to ensure the coaxiality of the valve core 140 and the valve port 121, so as to avoid the problem of increased leakage at the valve port 121.

[0027] The following description uses a stainless steel check valve as an example to illustrate the specific structure of the check valve 100. The valve core 140 has a sleeve portion 141 and an end head 142. One end of the sleeve portion 141 is movably sleeved on the guide member 130, and the other end is used to slide along the inner wall of the guide section 1201. The end head 142 is located at the end of the sleeve portion 141 near the valve port 121, and the end head 142 is used to open or close the valve port 121.

[0028] Specifically, the cross-sections of both the sleeve portion 141 and the end head 142 are annular. Along the axial direction of the valve core 140, the cross-section of the sleeve portion 141 remains unchanged. Along the direction from the sleeve portion 141 to the end head 142, the cross-section of the end head 142 gradually decreases. In other words, along the direction from the end head 142 to the sleeve portion 141, the outer diameter of the end head 142 gradually increases. The end of the end head 142 away from the sleeve portion 141 has a closed bottom. Thus, when the axis of the valve core 140 is offset from the axis of the valve body 110, as the valve core 140 moves toward the valve port 121, the end head 142 can cooperate with the end of the guide section 1201 away from the valve port 121 to play a guiding role. Specifically, the end head 142 can respond to the squeezing action of the guide section 1201, causing the valve core 140 to move along its own radial direction, thereby causing the axis of the valve core 140 to move toward the axis of the valve body 110. Finally, the sleeve portion 141 enters the guide section 1201 and cooperates with the guide section 1201 for guidance, so as to improve the coaxiality of the valve core 140 and the valve body 110.

[0029] Optionally, in one embodiment, when the end head 142 closes the valve port 121, the sleeve portion 141 and the guide member 130 are interlocked along the length of the valve core 140. And 3mm < It is understandable that when the end head 142 closes the valve port 121, the length of the sleeve portion 141 and the guide member 130 interlocking along the valve core 140 is minimized, that is, it is... By setting 3mm < This helps ensure the guiding effect between the sleeve portion 141 and the guide member 130. For example, The value can be 3.1mm, 3.2mm, 3.33mm, or 4mm, etc., and can be set according to actual needs. They will not be listed here.

[0030] Optionally, in one embodiment, the inner wall shape of the guide section 1201 is adapted to the outer wall shape of the sleeve portion 141, and the length of the inner wall of the guide section 1201 along the axial direction of the valve core 140 is... And 1mm < By adapting the inner wall shape of the guide section 1201 to the outer wall shape of the sleeve portion 141, it is convenient for the guide section 1201 and the sleeve portion 141 to have sufficient contact, thereby ensuring the guiding effect between the guide section 1201 and the sleeve portion 141. Furthermore, by setting the length of the inner wall of the guide section 1201 along the axial direction of the valve core 140 to... And 1mm < This ensures a sufficiently long guide length between the guide section 1201 and the sleeve portion 141, thereby facilitating the guiding function between them. For example, The values ​​can be 1.1mm, 1.21mm, 1.3mm, 2mm, etc., and can be set according to actual needs. They will not be listed here.

[0031] In one embodiment, the valve seat 120 further has an inlet section 1203 located on the side of the guide section 1201 opposite to the valve port section 1202. The inlet section 1203 has a tapered guide surface 122 with a large end 1221 and a small end 1222. The small end 1222 is connected to the inner wall of the guide section 1201, and the large end 1221 is disposed toward the guide member 130. Since the large end 1221 of the guide surface 122 is oriented towards the guide member 130, when the valve core 140 moves towards the valve port 121, the large end 1221 can provide a tolerance space for the valve core 140. Even if the valve core 140 has a certain degree of skew, it can smoothly enter the guide section 1201 through the entry section 1203. During the process of the valve core 140 entering the guide section 1201, the guide section 1201 can correct the valve core 140, thereby helping to ensure the coaxiality of the valve core 140 and the valve port 121. In this embodiment, when the axis of the valve core 140 is offset from the axis of the valve body 110, during the process of the valve core 140 moving towards the direction closer to the valve port 121, the end head 142 can cooperate with the end of the entry section 1203 away from the valve port 121 to play a guiding role, so as to guide the valve core 140 to automatically correct itself along its own radial direction, thereby improving the coaxiality of the valve core 140 and the valve body 110.

[0032] The outer wall of the valve seat 120 is welded and fixed to the valve body 110. The valve seat 120 has a first end face 124 and a second end face 125 at both ends along the axial direction of the valve port 121. The first end face 124 is disposed facing the guide member 130, and the second end face 125 is disposed away from the guide member 130.

[0033] In one embodiment, a first overflow groove 1241 is provided on the first end face 124. It is understood that, since the outer wall of the valve seat 120 is welded and fixed to the valve body 110, the first overflow groove 1241, by providing the first overflow groove 1241 on the first end face 124, can prevent the molten solder between the outer wall of the valve seat 120 and the valve body 110 from flowing along the first end face 124 to the valve port 121. In another embodiment, a second overflow groove 1251 is provided on the second end face 125. Similarly, since the outer wall of the valve seat 120 is welded and fixed to the valve body 110, the second overflow groove 1251, by providing the second overflow groove 1251 on the second end face 125, can prevent the molten solder between the outer wall of the valve seat 120 and the valve body 110 from flowing along the second end face 125 to the valve port 121. Furthermore, since the check valve 100 is located at the customer's location, it is usually connected to an external pipeline according to the customer's usage requirements. This external pipeline extends into the valve body 110 from the side of the valve port 121 away from the valve core 140 and is welded to the valve body 110. By creating a second overflow groove 1251 on the second end face 125, it is also possible to prevent the molten solder between the external pipeline and the valve body 110 from flowing along the second end face 125 to the valve port 121. In this way, it is possible to prevent solder from accumulating in the valve port 121, thereby preventing the valve core 140 from jamming and causing the valve port 121 to not close tightly, resulting in leakage.

[0034] Optionally, in one embodiment, the first overflow groove 1241 is disposed in the middle of the first end face 124.

[0035] Specifically, the first overflow groove 1241 has a first bottom wall 1242 and two first side walls 1243, the two first side walls 1243 being respectively arranged radially around the two ends of the first bottom wall 1242 along the valve port 121, and the depth of the first overflow groove 1241 is [missing information]. And 0.5mm < <1mm. It should be noted that the depth of the first overflow groove 1241 is... This refers to the distance between the first end face 124 and the first bottom wall 1242. For example, It can be set to 0.51mm, 0.52mm, 0.55mm, 0.6mm, 0.7mm or 0.9mm, etc.

[0036] In one embodiment, the second overflow groove 1251 has a second bottom wall 1252 and a second side wall 1253. One end of the second bottom wall 1252 is connected to the second side wall 1253, and the other end extends radially along the valve port 121 to the outer side wall of the valve seat 120. That is, the cross-section of the second overflow groove 1251 is "L"-shaped, which facilitates the flow of solder molten between the external pipeline and the valve body 110, as well as solder molten between the outer side wall of the valve seat 120 and the valve body 110, into the second overflow groove 1251. The width of the second bottom wall 1252 extending radially along the valve port 121 is... And 0.5mm < <0.8mm. For example, It can be set to 0.51mm, 0.52mm, 0.55mm, 0.6mm, 0.7mm, etc.

[0037] The first overflow groove 1241 is configured as an annular groove and extends around the axis of the valve port 121. The second overflow groove 1251 can also be configured as an annular groove and extends around the axis of the valve port 121.

[0038] In one embodiment, the outer wall of the valve seat 120 is provided with a receiving groove 123 for placing solder. The valve seat 120 is welded to the valve body 110 through the solder in the receiving groove 123. Optionally, the receiving groove 123 is configured as an annular groove, so that a welding ring can be placed in the receiving groove 123. The outer wall of the valve seat 120 is welded to the valve body 110 through the welding ring.

[0039] 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.

[0040] 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 in that, 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 guide section (1201) and a valve port section (1202). The valve port section (1202) has a valve port (121). The guide section (1201) is located on the side of the valve port section (1202) facing the guide (130). One end of the valve core (140) is movably connected to the guide member (130), and the other end is used to move toward or away from the valve port (121) to close or open the valve port (121). During the movement of the valve core (140), at least a portion of the outer wall of the valve core (140) can slide along the inner wall of the guide section (1201).

2. The one-way valve according to claim 1, characterized in that, The valve core (140) has a sleeve portion (141) and an end head (142). One end of the sleeve portion (141) is movably sleeved on the guide member (130), and the other end is used to slide along the inner wall of the guide section (1201). The end head (142) is located at the end of the sleeve portion (141) near the valve port (121), and the end head (142) is used to close or open the valve port (121).

3. The one-way valve according to claim 2, characterized in that, When the end head (142) closes the valve port (121), the sleeve portion (141) and the guide member (130) are interlocked along the valve core (140) for a length of time. And 3mm < .

4. The one-way valve according to claim 2 or 3, characterized in that, The inner wall shape of the guide section (1201) is adapted to the outer wall shape of the sleeve portion (141), and the length of the inner wall of the guide section (1201) along the axial direction of the valve core (140) is... And 1mm < .

5. 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 outer diameter of the end head (142) gradually increases.

6. The one-way valve according to claim 1 or 5, characterized in that, The valve seat (120) also has an inlet section (1203) located on the side of the guide section (1201) away from the valve port section (1202). The inlet section (1203) has a tapered guide surface (122) with a large end (1221) and a small end (1222). The small end (1222) is connected to the inner wall of the guide section (1201), and the large end (1221) is disposed toward the guide member (130).

7. The one-way valve according to claim 1, characterized in that, The outer wall of the valve seat (120) is welded and fixed to the valve body (110). The valve seat (120) has a first end face (124) and a second end face (125) at both ends along the axial direction of the valve port (121). The first end face (124) is disposed facing the guide member (130), and the second end face (125) is disposed away from the guide member (130). The first end face (124) is provided with a first overflow groove (1241); and / or, the second end face (125) is provided with a second overflow groove (1251).

8. The one-way valve according to claim 7, characterized in that, The first overflow channel (1241) has a first bottom wall (1242) and two first side walls (1243). The two first side walls (1243) are respectively arranged radially around the two ends of the first bottom wall (1242) along the valve port (121). The depth of the first overflow channel (1241) is... And 0.5mm < <1mm.

9. The one-way valve according to claim 7, characterized in that, The second overflow groove (1251) has a second bottom wall (1252) and a second side wall (1253), one end of the second bottom wall (1252) is connected to the second side wall (1253), and the other end extends radially along the valve port (121) to the outer side wall of the valve seat (120); The width of the second bottom wall (1252) extending radially along the valve port (121) is And 0.5mm < <0.8mm.

10. The one-way valve according to claim 7, characterized in that, The first overflow groove (1241) is configured as an annular groove, and the first overflow groove (1241) extends around the axis of the valve port (121); And / or, the second overflow groove (1251) is configured as an annular groove, and the second overflow groove (1251) extends about the axis of the valve port (121).

11. The one-way valve according to claim 7, characterized in that, The outer wall of the valve seat (120) is provided with a receiving groove (123), which is used to place solder. The valve seat (120) is welded and fixed to the valve body (110) through the solder in the receiving groove (123).

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