Pressing plate type one-way valve
By designing the extended chamber and inclined sealing surface in the check valve, the problem of insufficient medium flow during small strokes of the existing check valve valve core is solved, and a faster pressure relief time is achieved.
Patent Information
- Application Number
- CN202420295036.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-18
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-02-18
AI Technical Summary
The existing one-way valves have insufficient medium flow when the valve core is small, resulting in a long pressure relief time.
A pressure plate type check valve is designed. By setting an expansion chamber close to the valve port, the valve core increases the medium flow when it is small, and the pressure relief time is shortened through the inclination design of the sealing surface and the expansion surface.
It increases the medium flow rate during the valve core with a small stroke, shortens the pressure relief time, and improves the fluid transmission performance of the valve.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a pressure plate type one-way valve. Background Art
[0002] The one-way valve is one of the valve bodies used in the automobile air conditioning circuit. It automatically opens and closes based on the pressure difference of the fluid medium on the left and right sides of the valve body, and can prevent the fluid medium from flowing back. The fluid medium enters from the inlet. When the pressure difference between the inlet and outlet is greater than the compression force of the valve core spring, the valve core is lifted up, causing the valve core spring to compress, and the one-way valve opens. After the pressure difference disappears, the valve core spring force presses the valve core down, sealing the channel and preventing the fluid medium from flowing back.
[0003] The inner wall surface of the sealing surface of the existing one-way valve body extending toward the outlet section is close to the valve core, resulting in insufficient medium flow and a long pressure relief time when the valve core has a small stroke. Utility Model Content
[0004] In view of the defects in the prior art, the purpose of the utility model is to provide a pressure plate type one-way valve, which can increase the medium flow rate when the valve core has a small stroke and shorten the pressure relief time.
[0005] The technical solution adopted by the utility model is:
[0006] A pressure plate type one-way valve comprises a valve body and a valve core, wherein an inlet cavity, a valve chamber and an outlet cavity are sequentially provided on the valve body from the inlet end to the outlet end of the valve body, and the valve core is installed in the valve cavity; the valve cavity comprises a valve port, an expansion cavity and a guide cavity, the first end of the valve port is communicated with the inlet cavity, the guide cavity is communicated with the outlet cavity, the first end of the expansion cavity is communicated with the second end of the valve port, the second end of the expansion cavity is communicated with the guide cavity, the inner diameter of the first end of the expansion cavity is larger than the inner diameter of the second end of the valve port, the valve core is installed in the valve cavity, and can move axially along the valve cavity to open or close the valve port.
[0007] Furthermore, a sealing surface is provided on the valve body corresponding to the valve port position, and an extension surface is provided on the valve body corresponding to the extension cavity position. The sealing surface gradually inclines toward the outer diameter direction from the first end to the second end of the valve port, and the extension surface gradually inclines toward the outer diameter direction from the second end to the first end of the extension cavity.
[0008] Furthermore, the first end surface of the valve core is a spherical structure, the second end of the valve core is a rod-shaped structure, the first end of the valve core corresponds to the inlet end, and the second end of the valve core corresponds to the outlet end.
[0009] Furthermore, an annular groove is provided on the valve core and close to the spherical structure, and an O-ring is sleeved in the annular groove. The O-ring abuts against or separates from the sealing surface when the valve core moves.
[0010] Furthermore, it also includes a valve core spring. The rod-shaped structure is installed in the guide cavity, and the valve core spring is sleeved on the rod-shaped structure.
[0011] Furthermore, the lateral dimension of the first end of the rod-like structure is greater than the lateral dimension of the second end thereof and is adapted to the inner diameter of the valve core spring. The first end of the rod-like structure corresponds to the inlet end, the second end of the rod-like structure corresponds to the outlet end, and the valve core spring is sleeved on the first end and the second end of the rod-like structure.
[0012] Furthermore, a support plate is installed in the guide cavity, a center hole is opened on the support plate, and the rod-shaped structure is inserted into the center hole.
[0013] Furthermore, a retaining ring is packaged in the guide cavity, the retaining ring is in contact with the support plate and is located on a side facing the outlet end.
[0014] Furthermore, three guide ribs are installed at intervals along the circumference of the valve core, and the cross-section of the guide ribs is a trapezoidal structure.
[0015] Furthermore, a plurality of special-shaped holes are provided at intervals along the circumference of the support plate and outside the central hole.
[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.
[0018] Figure 1 A schematic diagram of the structure of the pressure plate type one-way valve in an open state provided in an embodiment of the present application;
[0019] Figure 2 A schematic structural diagram of a pressure plate type one-way valve in a closed state provided in an embodiment of the present application;
[0020] Figure 3 A schematic diagram of the structure of the valve body provided in the embodiment of the present application;
[0021] Figure 4A schematic diagram of the structure of the valve core and the valve core spring provided in the embodiment of the present application;
[0022] Figure 5 A schematic diagram of the structure of the valve core provided in an embodiment of the present application;
[0023] Figure 6 A schematic diagram of the structure of the support plate provided in an embodiment of the present application.
[0024] Among them, the valve body 1, the inlet end 11, the outlet end 12, the inlet cavity 13, the valve port 14, the expansion cavity 15, the guide cavity 16, the sealing surface 17, the expansion surface 18, the valve core 2, the guide rib 21, the O-ring 3, the support plate 4, the center hole 41, the special-shaped hole 42, the retaining ring 5, and the valve core spring 6. DETAILED DESCRIPTION
[0025] Here, it should be noted that the functions and methods involved in the present invention are merely conventional adaptive applications of the prior art. Therefore, the improvement of the present invention on the prior art is essentially the connection relationship between the hardware, rather than the functions and methods themselves. That is, although the present invention involves some functions and methods, it does not include improvements to the functions and methods themselves. The description of the functions and methods in the present invention is to better illustrate the present invention so as to better understand the present invention.
[0026] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.
[0027] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.
[0028] See also Figure 1-2 The present application discloses a pressure plate type one-way valve, comprising a valve body 1 and a valve core 2, wherein an inlet cavity 13, a valve chamber and an outlet cavity are sequentially provided on the valve body 1 from the inlet end 11 to the outlet end 12 of the valve body 1, and the valve core 2 is installed in the valve cavity; the valve cavity comprises a valve port 14, an expansion cavity 15 and a guide cavity 16, a first end of the valve port 14 is communicated with the inlet cavity 13, the guide cavity 16 is communicated with the outlet cavity, a first end of the expansion cavity 15 is communicated with a second end of the valve port 14, and a second end of the expansion cavity 15 is communicated with the guide cavity 16, an inner diameter of the first end of the expansion cavity 15 is greater than an inner diameter of the second end of the valve port 14, the valve core 2 is installed in the valve cavity, and can move axially along the valve cavity to open or close the valve port 14.
[0029] The present application sets an expansion chamber 15 adjacent to the valve port 14, wherein the inner diameter of the first end of the expansion chamber 15 is larger than the inner diameter of the second end of the valve port 14, so that an expansion section is formed adjacent to the valve port 14, thereby increasing the distance between the outer wall of the valve core 2 and the inner wall of the valve body 1, increasing the medium flow rate when the valve core 2 has a small stroke, and shortening the pressure relief time.
[0030] A sealing surface 17 is provided on the valve body 1 at a position corresponding to the valve port 14, and an expansion surface 18 is provided on the valve body 1 at a position corresponding to the expansion chamber 15. The valve core 2 moves axially along the valve chamber under the pressure difference of the fluid medium. When the valve core 2 moves toward the opening end and abuts against the sealing surface 17, the one-way valve is closed. When the valve core 2 moves toward the outlet end 12 and separates from the sealing surface 17, the one-way valve is opened. The sealing surface 17 gradually inclines in the outer diameter direction from the first end to the second end of the valve port 14, so that the inner diameter of the first end of the valve port 14 is smaller than the inner diameter of the second end thereof. The expansion surface 18 is formed by the valve core 2 and the ... The second end of the expansion chamber 15 gradually inclines toward the outer diameter direction from the first end, so that the inner diameter of the second end of the expansion chamber 15 is smaller than the inner diameter of the first end thereof, and the inner diameter of the first end of the expansion chamber 15 is larger than the inner diameter of the second end of the valve port 14, so that the first end of the expansion chamber 15 expands outward relative to the second end of the valve port 14, and the valve core 2 is slightly opened to obtain a larger flow rate, which greatly shortens the pressure relief time; and by adopting the above structure, the angle between the sealing surface 17 and the axis of the valve body 1 can be easily set to a reasonable value, which can avoid the parting line of the O-ring 3 and ensure that the O-ring 3 will not fall off the valve core 2, which is more conducive to sealing.
[0031] The first end surface of the valve core 2 is a spherical structure, and the second end of the valve core 2 is a rod-shaped structure. The first end of the valve core 2 corresponds to the inlet end 11, and the second end of the valve core 2 corresponds to the outlet end 12. An annular groove is provided on the valve core 2 and close to the spherical structure. An O-ring 3 is sleeved in the annular groove. The O-ring 3 abuts against or separates from the sealing surface 17 when the valve core 2 moves.
[0032] The first end surface of the valve core 2 is configured as a spherical structure, which can increase the contact area with the fluid medium and play a certain guiding role.
[0033] The rod-shaped structure is installed in the guide cavity 16, and a valve core spring 6 is sleeved on the valve stem structure.
[0034] The lateral dimension of the first end of the rod-like structure is greater than the lateral dimension of the second end thereof and is adapted to the inner diameter of the valve core spring 6. The first end of the rod-like structure corresponds to the inlet end 11, and the second end of the rod-like structure corresponds to the outlet end 12. The valve core spring 6 is sleeved on the first and second ends of the rod-like structure.
[0035] The first end of the rod-shaped structure is shaped like a circle, and the second end of the rod-shaped structure is a cylinder with a slightly larger diameter, which is slightly smaller than the inner diameter of the valve core spring 6. It can support the valve core spring 6 mounted on its outer periphery and reduce the radial force on the valve core spring 6.
[0036] A support plate 4 is installed in the guide cavity 16. The support plate 4 is provided with a center hole 41, and the rod-like structure is inserted into the center hole 41. A plurality of special-shaped holes 42 are provided along the circumference of the support plate 4 and at intervals outside the center hole 41 for fluid medium to flow.
[0037] The guide cavity 16 is further packed with a retaining ring 5 , which is a steel wire ring, abuts against the support plate 4 and is located on the side facing the outlet end 12 to limit the support plate 4 .
[0038] A support plate 4 mounting groove and a retaining ring 5 mounting groove are respectively provided on the inner side wall of the valve body 1 and located at the position of the guide cavity 16 . The support plate 4 is installed in the support plate 4 mounting groove, and the retaining ring 5 is installed in the retaining ring 5 mounting groove.
[0039] In order to further improve the guiding effect, three guide ribs 21 are installed at intervals along the circumference of the valve core 2. The cross-section of the guide rib 21 is a trapezoidal structure. The outer side of the guide rib 21 contacts the side wall of the guide cavity 16. One end of the guide rib 21 extends to the first end of the rod-shaped structure and is located at the outer peripheral position of the valve core spring 6, so as to guide the movement of the valve core 2 in the valve body 1, reduce the radial force on the valve core spring 6, increase the service life of the valve core spring 6, and avoid damage to the valve core spring 6 due to excessive impact pressure.
[0040] In this application, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0041] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, systems and techniques are not shown in detail so as not to obscure the understanding of this specification.
[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, systems, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, systems, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.
Claims
1. A pressure plate type one-way valve, comprising a valve body and a valve core, wherein the valve body is provided with an inlet cavity, a valve chamber and an outlet cavity in sequence from the inlet end to the outlet end of the valve body, and the valve core is installed in the valve chamber; characterized in that: The valve cavity includes a valve port, an expansion cavity and a guide cavity. The first end of the valve port is communicated with the inlet cavity, the guide cavity is communicated with the outlet cavity, the first end of the expansion cavity is communicated with the second end of the valve port, the second end of the expansion cavity is communicated with the guide cavity, the inner diameter of the first end of the expansion cavity is larger than the inner diameter of the second end of the valve port, the valve core is installed in the valve cavity and can move axially along the valve cavity to open or close the valve port.
2. The pressure plate type one-way valve according to claim 1, characterized in that: A sealing surface is provided on the valve body corresponding to the valve port position, and an extension surface is provided on the valve body corresponding to the extension cavity position. The sealing surface gradually inclines toward the outer diameter direction from the first end to the second end of the valve port, and the extension surface gradually inclines toward the outer diameter direction from the second end to the first end of the extension cavity.
3. The pressure plate type one-way valve according to claim 2, characterized in that: The first end surface of the valve core is a spherical structure, the second end of the valve core is a rod-shaped structure, the first end of the valve core corresponds to the inlet end, and the second end of the valve core corresponds to the outlet end.
4. The pressure plate type one-way valve according to claim 3, characterized in that: An annular groove is provided on the valve core and close to the spherical structure. An O-ring is sleeved in the annular groove. The O-ring contacts or separates from the sealing surface when the valve core moves.
5. The pressure plate type one-way valve according to claim 3, characterized in that: It also includes a valve core spring. The rod-shaped structure is installed in the guide cavity, and the valve core spring is sleeved on the rod-shaped structure.
6. The pressure plate type one-way valve according to claim 5, characterized in that: The lateral dimension of the first end of the rod-like structure is greater than the lateral dimension of the second end thereof and is adapted to the inner diameter of the valve core spring. The first end of the rod-like structure corresponds to the inlet end, the second end of the rod-like structure corresponds to the outlet end, and the valve core spring is sleeved on the first and second ends of the rod-like structure.
7. The pressure plate type one-way valve according to claim 5, characterized in that: A support plate is installed in the guide cavity, a center hole is opened on the support plate, and the rod-shaped structure is inserted into the center hole.
8. The pressure plate type one-way valve according to claim 7, characterized in that: A retaining ring is also packed in the guide cavity, the retaining ring abuts against the support plate and is located on a side facing the outlet end.
9. The pressure plate type one-way valve according to claim 1, characterized in that: Three guide ribs are installed at intervals along the circumference of the valve core, and the cross section of the guide ribs is a trapezoidal structure.
10. The pressure plate type one-way valve according to claim 7, characterized in that: A plurality of special-shaped holes are arranged at intervals along the circumference of the support plate and outside the central hole.