Compact diaphragm spring one-way valve

Abstract

The utility model relates to the technical field of one-way valves, in particular to a compact diaphragm spring one-way valve which comprises a first valve seat, a sealing ball, a diaphragm spring and a second valve seat, the second valve seat is arranged below the first valve seat, and a conical surface groove hole is formed in the end face, close to the second valve seat, of the first valve seat. A sealing ball is installed in a conical groove hole of the second valve seat, a first boss is arranged on the end face, close to the first valve seat, of the second valve seat, a second boss is downwards arranged on the first boss, and a third boss is downwards arranged on the second boss. A conventional one-way valve is driven by the spiral spring, the spring is compressed when the valve is opened, the spring is reset when the valve is closed, the one-way valve of the structure is large in axial space along the spring and can not be used in occasions with limited axial space, and in addition, the stroke of the valve is large and is difficult to control. Therefore, the one-way valve with the structure is slow in response and is not suitable for occasions with high requirements on control precision.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, and particularly relates to a compact diaphragm spring check valve. Background Art

[0002] Check valves are widely used in products such as machinery, pipelines, aviation, and vehicles. Especially, a small improvement can bring huge economic benefits due to their large usage quantity, and they are used to control the on-off of pipelines.

[0003] The existing check valve with the publication number CN201795107U and the name of "a check valve" includes a valve body and a valve cover. A valve core is arranged in the space formed by the valve body and the valve cover. The valve body is of a tubular structure. One end of the valve body extends inwards to form a valve bottom with a central hole, and the other end is provided with an annular inner flange for fitting and connecting the valve cover. This kind of check valve realizes the function of the check valve most simply. The overall structure of the valve is all thin-walled, simple in overall structure, and lightweight in weight. In particular, the valve body, the valve cover, and the valve core are all made of plastic material. Through the simple connection structure of the tubular valve body, the valve cover, and the valve core, the lightweight and low-cost manufacturing are realized.

[0004] However, the above-mentioned conventional check valve is driven by a helical spring. When the valve is opened, the spring is compressed, and when the valve is closed, the spring resets. This kind of check valve has a large axial space along the spring and cannot be used in occasions with limited axial space. In addition, the stroke of the valve is large and difficult to control, which also leads to slow response of this kind of check valve and is not suitable for occasions with high requirements for control accuracy. Content of the Utility Model

[0005] The utility model solves the problems in the related art and provides a compact diaphragm spring check valve.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions: A compact diaphragm spring check valve includes a first valve seat, a sealing ball, a diaphragm spring, and a second valve seat. The second valve seat is arranged below the first valve seat. A conical groove hole is opened on one end face of the first valve seat close to the second valve seat. A sealing ball is installed in the conical groove hole of the second valve seat. A first boss is opened on the end face of the second valve seat close to the first valve seat, and a second boss is opened downward on the first boss. A third boss is opened downward on the second boss, and a fourth boss is opened downward on the third boss. A diaphragm spring is horizontally arranged in the second valve seat. The outer end face of the diaphragm spring abuts against the third boss. A third inner hole is vertically penetrated through the middle of the diaphragm spring, and the third inner hole abuts against the sealing ball. A discharge hole is vertically penetrated through the center of the second valve seat.

[0007] As a preferred solution, a first inner hole is vertically opened at one end of the conical groove hole of the first valve seat away from the second valve seat, and a second inner hole is vertically opened at one end of the first inner hole away from the second valve seat.

[0008] As a preferred solution, a peripheral boss is provided at one end of the outer part of the first valve seat close to the first valve seat.

[0009] As a preferred solution, an annular groove is formed on one end face of the first valve seat close to the second valve seat, and a flexible ring cylinder is vertically fixed inside the annular groove, and the flexible ring cylinder is deformed and pressed against the sealing ball.

[0010] As a preferred solution, a plurality of protrusions are vertically and uniformly fixed on the inner wall of the conical groove hole, and the plurality of protrusions limit and install the sealing ball in the conical groove hole.

[0011] As a preferred solution, a plurality of spiral cantilevers are uniformly arranged on the diaphragm spring, and an extrusion clamping edge is fixed on the outer edge of the plurality of spiral cantilevers.

[0012] As a preferred solution, a plurality of buckles are uniformly fixed on the circumferential surface of the first boss, and the plurality of buckles are clamped on the peripheral boss.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: In the use of the present utility model, the sealing ball and the diaphragm spring are installed together between the first valve seat and the second valve seat, and the diaphragm spring is installed below the sealing ball. Since the place where the third inner hole of the diaphragm spring contacts the sealing ball is below the third boss of the second valve seat, the diaphragm spring can be resisted so that its edge portion abuts against the second platform of the second valve seat; at the same time, the spiral cantilevers of the diaphragm spring are elastically deformed to provide an initial force for the sealing ball, so that the sealing ball is in closer contact with the conical groove hole of the first valve seat to reach the initial state, and the sealing ball blocks the bottom end of the second inner hole of the first valve seat. When there is high pressure on the inlet side and the inlet side pressure is greater than the outlet side pressure, under the action of the pressure difference, the medium passes through the inner hole of the first valve seat to push the sealing ball open. At this time, the deformation amount of the diaphragm spring increases, and the one-way valve opens, and the medium flows to the one-way valve outlet. When the high pressure on the inlet side disappears and the inlet side pressure is close to or less than the outlet side pressure, the sealing ball is pushed back to the initial position under the action of the elastic force of the diaphragm spring and the pressure difference. At this time, the deformation amount of the diaphragm spring decreases until the initial state, and the one-way valve closes, and the flow of the medium to the one-way valve outlet stops. The design of using the diaphragm spring to achieve one-way sealing is adopted. The deformation amount of the diaphragm spring is limited, and the opening of the diaphragm spring with a short deformation amount and its achieved fast response speed, the cooperation of the diaphragm spring and the sealing ball greatly shortens the action stroke of the one-way valve, greatly improves the response speed of the valve opening and closing, is suitable for occasions with high requirements for control accuracy, and the shortening of the stroke also makes the axial dimension of the one-way valve of this valve shorter, is suitable for occasions with limited axial space, greatly compresses the axial length, is suitable for occasions with limited axial space. At the same time, the full stroke of the opening and closing of the one-way valve with this structure is only 1 / 4 to 1 / 3 of its nominal diameter, the stroke is greatly shortened, and it can be quickly opened and closed, which is suitable for occasions with high requirements for control accuracy. Description of the Drawings

[0014] Figure 1 is a schematic structural view in the overall disassembled state in an embodiment of the present utility model;

[0015] Figure 2 is an overall sectional view in an embodiment of the present utility model;

[0016] Figure 3 is an overall sectional view of the first valve seat in an embodiment of the present utility model;

[0017] Figure 4 is an overall sectional view of the second valve seat in an embodiment of the present utility model;

[0018] Figure 5 is a schematic structural view of the diaphragm spring in the disassembled state in an embodiment of the present utility model;

[0019] Figure 6 is an overall schematic view of the second valve seat in the disassembled state in an embodiment of the present utility model.

[0020] In the figure: 1. First valve seat; 11. First inner hole; 12. Second inner hole; 13. Tapered groove hole; 14. Flexible ring cylinder; 15. Annular groove; 16. Peripheral boss; 17. Protrusion; 2. Sealing ball; 3. Diaphragm spring; 31. Extrusion clamping edge; 32. Spiral cantilever; 33. Third inner hole; 4. Second valve seat; 41. First boss; 42. Snap; 43. Second boss; 44. Third boss; 45. Fourth boss; 46. Discharge hole. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present utility model and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0022] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that for the sake of convenience in description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc., are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Without contrary statements, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be construed as limiting the protection scope of the present utility model; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0025] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above-mentioned", etc., can be used here to describe the spatial positional relationships between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0026] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without otherwise stating, the above words have no special meanings, and thus cannot be construed as limiting the protection scope of the present utility model.

[0027] AsFigures 1 to 6 As shown, a compact diaphragm spring one-way valve comprises a first valve seat 1, a sealing ball 2, a diaphragm spring 3 and a second valve seat 4. The second valve seat 4 is arranged below the first valve seat 1. A conical slot 13 is provided on one end surface of the first valve seat 1 close to the second valve seat 4. The sealing ball 2 is installed in the conical slot 13 of the second valve seat 4. A first boss 41 is provided on the end surface of the second valve seat 4 close to the first valve seat 1, and a second boss 43 is provided downward on the first boss 41. A second boss 43 is provided downward on the second boss 43. The second valve seat 4 has three bosses 44, and a fourth boss 45 is downwardly opened on the third boss 44. A diaphragm spring 3 is horizontally arranged in the second valve seat 4, and the outer end surface of the diaphragm spring 3 is pressed against the third boss 44. A third inner hole 33 is penetrated through the middle of the diaphragm spring 3, and the third inner hole 33 is set to press against the sealing ball 2. A discharge hole 46 is vertically penetrated through the center of the second valve seat 4. In use, the sealing ball 2 and the diaphragm spring 3 are installed together between the first valve seat 1 and the second valve seat 4, and the diaphragm spring 3 is installed below the sealing ball 2. Since the place where the third inner hole 33 of the diaphragm spring 3 contacts the sealing ball 2 is below the third boss 44 of the second valve seat 4, the diaphragm spring 3 can be The first valve seat 1 is pressed against the diaphragm spring 3, so that its edge part 31 is pressed against the second platform 44 of the second valve seat 4; at the same time, the diaphragm spring spiral cantilever 32 is elastically deformed to provide an initial force to the sealing ball 3, so that the sealing ball 3 and the conical groove hole 13 of the first valve seat 1 are in closer contact and reach the initial state. The sealing ball 3 blocks the bottom end of the second inner hole 12 of the first valve seat 1. When high pressure appears on the inlet side and the inlet pressure is greater than the outlet pressure, the medium pushes the sealing ball 3 through the inner hole 11 of the first valve seat 1 under the action of the pressure difference. At this time, the deformation of the diaphragm spring 3 increases, the one-way valve opens, and the medium flows to the one-way valve outlet. When the high pressure on the inlet side disappears and the inlet pressure is close to or less than the outlet pressure, the sealing ball 3 is pushed back to the initial position under the action of the elastic force of the diaphragm spring 3 and the pressure difference. At this time, the diaphragm The deformation of the spring 3 decreases until it reaches the initial state, the one-way valve is closed, and the flow of the medium to the one-way valve outlet stops. The diaphragm spring 3 is used to realize the one-way sealing design. The deformation of the diaphragm spring 3 is limited. The shorter the deformation of the diaphragm spring 3 is, the faster the response speed is achieved. The distance between the second boss 43 and the third boss 44 of the second valve seat 4 is small, generally between 0.2 and 1 mm. This distance can limit the maximum deformation of the diaphragm spring 3, and also limits the maximum stroke of the sealing ball 3, greatly compressing the axial length, and is suitable for occasions with limited axial space. At the same time, the full opening and closing stroke of the one-way valve of this structure is only 1 / 4 to 1 / 3 of its diameter, and the stroke is greatly shortened. It can be opened and closed quickly and is suitable for occasions with high control accuracy requirements.

[0028] like Figure 2 and Figure 3, a first inner hole 11 is vertically opened at one end of the conical groove hole 13 of the first valve seat 1 away from the second valve seat 4, and a second inner hole 12 is vertically opened at one end of the first inner hole 11 away from the second valve seat 4. During use, the first inner hole 11 and the second inner hole 12 on the first valve seat 1 are arranged in a through manner for guiding the flow of the medium in the later stage.

[0029] As Figure 2 and Figure 3 , an outer peripheral boss 16 is arranged at one end of the outer part of the first valve seat 1 close to the first valve seat 1. A plurality of buckles 42 are evenly fixed on the circumferential surface of the first boss 41, and the plurality of buckles 42 are clamped on the outer peripheral boss 16. Several buckles 42 are distributed on the first boss 41 of the second valve seat 4, and the buckles 42 are clamped onto the outer peripheral boss 16 of the first valve seat 1, completing the directional assembly of the one-way valve.

[0030] As Figure 3 , an annular groove 15 is opened on one end face of the first valve seat 1 close to the second valve seat 4, and a flexible ring cylinder 14 is vertically fixed inside the annular groove 15, and the flexible ring cylinder 14 is deformed and pressed against the sealing ball 2. The flexible ring cylinder 14 is made of rubber material. The flexible ring cylinder 14 is oppressed by the sealing ball 2, resulting in the deformation of the flexible ring cylinder 14, which is convenient for the sealing tightness between the sealing ball 2 and the end of the first inner hole 11 on the first boss 41.

[0031] As Figure 3 , a plurality of protrusions 17 are evenly and vertically fixed on the inner wall of the conical groove hole 13, and the plurality of protrusions 17 limit and install the sealing ball 2 in the conical groove hole 13. There are a certain number of protrusions 17 around the conical groove hole 13. The protrusions 17 limit and bear the sealing ball 14, and the protrusions 17 can play a guiding and constraining role for the sealing ball 14.

[0032] As Figure 2 and Figure 5 , a plurality of spiral cantilevers 32 are evenly arranged on the diaphragm spring 3, and an extrusion clamping edge 31 is fixed on the outer edge of the plurality of spiral cantilevers 32. The extrusion clamping edge 31 is fixed on the outer edge of the plurality of spiral cantilevers 32 of the diaphragm spring 3. The extrusion clamping edge 31 presses to deform the plurality of spiral cantilevers 32, which is convenient for ensuring the effectiveness of the deformation and pressing of the diaphragm spring 3.

[0033] In this embodiment, the middle sealing ball 2 and the diaphragm spring 3 are installed together between the first valve seat 1 and the second valve seat 4. The diaphragm spring 3 is installed below the sealing ball 2. Since the place where the third inner hole 33 of the diaphragm spring 3 contacts the sealing ball 2 is below the third boss 44 of the second valve seat 4, the diaphragm spring 3 can be resisted so that its edge portion 31 abuts against the second platform 44 of the second valve seat 4. At the same time, the spiral cantilever 32 of the diaphragm spring is elastically deformed to provide an initial force for the sealing ball 3, so that the sealing ball 3 contacts the conical groove hole 13 of the first valve seat 1 more closely to reach the initial state. The sealing ball 3 blocks the bottom end of the second inner hole 12 of the first valve seat 1. Then, several buckles 42 are distributed on the first boss 41 of the second valve seat 4, and the buckles 42 are clamped to the peripheral boss 16 of the first valve seat 1, completing the directional assembly of the one-way valve. The medium is introduced from the second inner hole 12 of the first valve seat 1. When the medium pressure increases, the medium enters from the first inner hole 11, pushes the sealing ball 3 to squeeze the diaphragm spring 3 to deform downward, the sealing ball 3 slides out of the conical groove hole 13, the medium enters the second valve seat 4, and the medium is discharged through the discharge hole 46.

[0034] The above is the preferred embodiment of the present invention. Those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiment. Therefore, the present invention is not limited to the above specific embodiments, and any obvious improvements, substitutions or variations made by those skilled in the art on the basis of the present invention fall within the protection scope of the present invention.

Claims

1. A compact diaphragm spring check valve, characterized in that: The invention comprises a first valve seat (1), a sealing ball (2), a diaphragm spring (3) and a second valve seat (4); the second valve seat (4) is arranged below the first valve seat (1); a conical groove hole (13) is provided on an end surface of the first valve seat (1) close to the second valve seat (4); a sealing ball (2) is installed in the conical groove hole (13) of the second valve seat (4); a first boss (41) is provided on an end surface of the second valve seat (4) close to the first valve seat (1); and a second boss (41) is provided downwardly on the first boss (41). 43), a third boss (44) is formed downwardly on the second boss (43), and a fourth boss (45) is formed downwardly on the third boss (44), the diaphragm spring (3) is horizontally arranged in the second valve seat (4), the outer end surface of the diaphragm spring (3) is pressed against the third boss (44), a third inner hole (33) is formed through the middle of the diaphragm spring (3), and the third inner hole (33) is formed to press against the sealing ball (2), and a discharge hole (46) is formed vertically through the center of the second valve seat (4).

2. A compact diaphragm spring check valve according to claim 1, characterized in that: A first inner hole (11) is vertically opened at one end of the conical slot hole (13) of the first valve seat (1) away from the second valve seat (4), and a second inner hole (12) is vertically opened at one end of the first inner hole (11) away from the second valve seat (4).

3. A compact diaphragm spring check valve according to claim 2, characterized in that: An outer peripheral boss (16) is provided on one end of the first valve seat (1) close to the first valve seat (1).

4. A compact diaphragm spring check valve according to claim 3, characterized in that: An annular groove (15) is provided on an end surface of the first valve seat (1) close to the second valve seat (4), and a flexible ring cylinder (14) is vertically fixed inside the annular groove (15), and the flexible ring cylinder (14) is deformed and pressed against the sealing ball (2).

5. A compact diaphragm spring check valve according to claim 4, characterized in that: A plurality of protrusions (17) are evenly and vertically fixed on the inner wall of the conical surface slot hole (13), and the plurality of protrusions (17) limit the installation of the sealing ball (2) in the conical surface slot hole (13).

6. A compact diaphragm spring check valve according to claim 5, characterized in that: A plurality of spiral cantilevers (32) are evenly arranged on the diaphragm spring (3), and an extrusion clamping edge (31) is fixed to the outer edges of the plurality of spiral cantilevers (32).

7. A compact diaphragm spring check valve according to claim 6, characterized in that: A plurality of buckles (42) are evenly fixed on the circumferential surface of the first boss (41), and the plurality of buckles (42) are buckled onto the peripheral boss (16).

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