Sliding block and four-way valve

Abstract

The invention provides a sliding block and a four-way valve, and the sliding block comprises a lining body which comprises a base and a base body, and the two ends of the base body are respectively provided with a first injection molding hole and a second injection molding hole which are through; the injection molding shell comprises an injection molding main body, a first annular injection molding part and a second annular injection molding part; the lining body is provided with an inner tangent plane and an outer tangent plane which extend in the width direction of the base body and are perpendicular to the bottom face of the base body, the inner tangent plane is tangent to the inner wall of the base body, the outer tangent plane is tangent to the outer wall of the base body, and the volume of the portion, located on one side of the outer tangent plane, of the first annular injection molding part is V1, the first annular injection molding part is located on one side of the outer tangent plane, the second annular injection molding part is located on the other side of the outer tangent plane, the volume of the area between the bottom face of the base body and the inner tangent plane is V2, the area defined by the top face and the side face of the first annular injection molding part and the top face of the base body on the outer tangent plane is S3, S1 is larger than or equal to (V2 / V1) S3, and S2 is larger than or equal to (V2 / V1) S3. By means of the scheme, the problem that in the prior art, a sliding block is prone to cracks after injection molding can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of four-way valves, and in particular to a slider and a four-way valve. Background Art

[0002] The slider, liner body and injection molded shell of the four-way valve in the prior art are formed by integral injection molding. During injection molding, the flow rate through the flow hole of the liner body is small, while the flow rate through the outer edge of the liner body and the mold is large. In this way, the injection fluid passing through the outer edge of the liner body and the mold flows into the area below the liner body and merges with the injection fluid passing through the flow hole of the liner body. Since the flow distances of the two injection fluids are different, there is a temperature difference, which may cause cracks at the confluence after cooling. Summary of the invention

[0003] The invention provides a slider and a four-way valve to solve the problem that the slider in the prior art is prone to cracks after injection molding.

[0004] In order to solve the above problems, according to one aspect of the present invention, there is provided a slider, comprising: an inner lining body, the inner lining body comprising a base and a substrate, the substrate being arranged around the outer periphery of the base, and the two ends of the substrate respectively having a first injection hole and a second injection hole penetrating therethrough; an injection molded shell, the injection molded shell covering the base and the substrate by injection molding, the injection molded shell comprising an injection molded body, a first annular injection molded part and a second annular injection molded part, the inner wall of the injection molded body being fitted with the outer wall of the base and the top surface of the substrate, the outer wall of the substrate being fitted with the first annular injection molded part, and the bottom surface of the substrate being fitted with the inner wall of the second annular injection molded part; wherein the first injection hole The area of ​​the first annular injection molding part is S1, the area of ​​the second injection molding hole is S2, the lining body has an inner tangent surface and an outer tangent surface, the inner tangent surface and the outer tangent surface extend along the width direction of the substrate and are perpendicular to the bottom surface of the substrate, the inner tangent surface is tangent to the inner wall of the substrate, and the outer tangent surface is tangent to the outer wall of the substrate, the volume of the first annular injection molding part on one side of the outer tangent surface is V1, the volume of the second annular injection molding part on the other side of the outer tangent surface and between the bottom surface of the substrate and the inner tangent surface is V2, the area enclosed by the top surface and side surfaces of the first annular injection molding part and the top surface of the substrate on the outer tangent surface is S3, S1≥(V2 / V1)S3, S2≥(V2 / V1)S3.

[0005] Furthermore, S1≥0.7S3, S2≥0.7S3.

[0006] Furthermore, S1≥0.9S3, S2≥0.9S3.

[0007] Further, the first injection hole and the second injection hole each include at least one flow hole.

[0008] Furthermore, the shape of the flow hole is a waist-shaped hole, a round hole, a square hole, or a polygonal hole.

[0009] Furthermore, the base body has a plurality of injection molding grooves, and the plurality of injection molding grooves are distributed at intervals along the outer periphery of the base body.

[0010] Furthermore, the base includes an annular plate, a first plate and a second plate. The annular plate is connected to the outer periphery of the base. The first plate and the second plate are respectively arranged at both ends of the annular plate. The first plate has a first injection hole, and the second plate has a second injection hole.

[0011] Furthermore, a region between the bottom surface of the injection molding body, the inner wall of the first annular injection molding part and the top surface of the second annular injection molding part forms a clamping cavity, and the base body is embedded in the clamping cavity.

[0012] Furthermore, the base and the substrate are an integrated structure, and both the base and the substrate are made of metal or alloy.

[0013] Furthermore, the slider also includes a support pin, which is arranged in the cavity of the base, and two ends of the support pin are respectively connected to two opposite inner walls of the base.

[0014] According to another aspect of the present invention, a four-way valve is provided. The four-way valve comprises the above-mentioned slider.

[0015] The technical solution of the present invention is applied to provide a slider, comprising: an inner lining body, the inner lining body comprising a base and a substrate, the substrate being arranged around the outer periphery of the base, and having a first injection hole and a second injection hole respectively penetrating at both ends of the substrate; an injection molded shell, the injection molded shell covering the base and the substrate by injection molding, the injection molded shell comprising an injection molded body, a first annular injection molded part and a second annular injection molded part, the inner wall of the injection molded body being fitted with the outer wall of the base and the top surface of the substrate, the outer wall of the substrate being fitted with the first annular injection molded part, and the bottom surface of the substrate being fitted with the inner wall of the second annular injection molded part; wherein the area of ​​the first injection molded hole is S1 , the area of ​​the second injection hole is S2, the lining body has an inner tangent surface and an outer tangent surface, the inner tangent surface and the outer tangent surface extend along the width direction of the substrate and are perpendicular to the bottom surface of the substrate, the inner tangent surface is tangent to the inner wall of the substrate, and the outer tangent surface is tangent to the outer wall of the substrate, the volume of the first annular injection molding part on one side of the outer tangent surface is V1, the volume of the second annular injection molding part on the other side of the outer tangent surface and between the bottom surface of the substrate and the inner tangent surface is V2, the area enclosed by the top surface and side surfaces of the first annular injection molding part and the top surface of the substrate on the outer tangent surface is S3, S1≥(V2 / V1)S3, S2≥(V2 / V1)S3. By adopting this scheme, the ratio of the area S1 of the first injection hole, the area S2 of the second injection hole, the top surface and the side surface of the first annular injection molded part, and the cross-sectional area S3 formed by the top surface of the substrate on the outer section is limited within the above-mentioned volume ratio range. In this way, during the injection molding process, after the injection molding fluid flows through the area S1 of the first injection molding hole, the area S2 of the second injection molding hole, and the cross-sectional area S3, the temperature of the injection molding fluid at the confluence is roughly the same, making it difficult to generate cracks. In addition, the confluence of the injection molding fluid is not near the first injection molding hole and the second injection molding hole, but close to the outer edge of the substrate. In this way, even if cracks are generated, the cracks will not extend to the inner cavity of the slider, thereby avoiding leakage. By using this scheme, the problem of the slider in the prior art being prone to cracks after injection molding is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of a slider provided by an embodiment of the present invention is shown;

[0018] Figure 2 Shows Figure 1 A schematic diagram of the structure of the middle lining body;

[0019] Figure 3 Shows Figure 1 Top view of the middle slider;

[0020] Figure 4 Shows Figure 3Cross-sectional view of CC;

[0021] Figure 5 Shows Figure 1 A cross-sectional view of the middle slider;

[0022] Figure 6 A schematic diagram showing the circulation of injection fluid during injection molding of a slider provided by an embodiment of the present invention;

[0023] Figure 7 A schematic structural diagram of a liner body provided in another embodiment of the present invention is shown.

[0024] The above drawings include the following reference numerals:

[0025] 10. Liner body; 11. Base; 12. Base; 121. First injection hole; 122. Second injection hole; 123. Ring plate; 124. First plate; 125. Second plate; 126. Injection groove;

[0026] 20. Injection molded shell; 21. Injection molded body; 22. First annular injection molded part; 23. Second annular injection molded part;

[0027] 30. Support pin;

[0028] 40, internal section;

[0029] 50. External section. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figures 1 to 6 As shown, an embodiment of the present invention provides a slider, comprising:

[0032] The lining body 10 includes a base 11 and a matrix 12. The matrix 12 is arranged around the outer periphery of the base 11. Both ends of the matrix 12 respectively have a first injection hole 121 and a second injection hole 122 passing through.

[0033] An injection molded shell 20, the injection molded shell 20 covers the base 11 and the substrate 12 by injection molding, and the injection molded shell 20 includes an injection molded body 21, a first annular injection molded part 22, and a second annular injection molded part 23. The inner wall of the injection molded body 21 is bonded to the outer wall of the base 11 and the top surface of the substrate 12, the outer wall of the substrate 12 is bonded to the first annular injection molded part 22, and the bottom surface of the substrate 12 is bonded to the inner wall of the second annular injection molded part 23;

[0034] Among them, the area of ​​the first injection hole 121 is S1, the area of ​​the second injection hole 122 is S2, the lining body 10 has an inner section 40 and an outer section 50, the inner section 40 and the outer section 50 extend along the width direction of the substrate 12 and are perpendicular to the bottom surface of the substrate 12, the inner section 40 is tangent to the inner wall of the substrate 12, and the outer section 50 is tangent to the outer wall of the substrate 12, the volume of the first annular injection molding 22 located on one side of the outer section 50 is V1, the volume of the second annular injection molding 23 located on the other side of the outer section 50 and between the bottom surface of the substrate 12 and the inner section 40 is V2, the area enclosed by the top and side surfaces of the first annular injection molding 22 and the top surface of the substrate 12 on the outer section 50 is S3, S1≥(V2 / V1)S3, S2≥(V2 / V1)S3.

[0035] By adopting this scheme, the ratio of the area S1 of the first injection hole and the area S2 of the second injection hole to the top and side surfaces of the first annular injection molded part 22 and the cross-sectional area S3 formed by the top surface of the substrate 12 on the outer section is limited within the above-mentioned volume ratio range. In this way, during the injection molding process, after the injection molding fluid flows through the area S1 of the first injection molding hole, the area S2 of the second injection molding hole and the cross-sectional area S3, the temperature of the injection molding fluid at the confluence is roughly the same, making it difficult to generate cracks. In addition, the confluence of the injection molding fluid is not near the first injection molding hole and the second injection molding hole, but close to the outer edge of the substrate. In this way, even if cracks are generated, the cracks will not extend to the inner cavity of the slider, thereby avoiding leakage. By using this scheme, the problem of the slider in the prior art being prone to cracks after injection molding is effectively solved.

[0036] It should be noted that the first injection hole 121 and the second injection hole 122 are arranged along the length direction of the base 12 and are respectively located at two ends of the base 11 .

[0037] During the injection molding process, the relationship between the injection volume, flow rate, flow area and flow time is: the injection volume is equal to the product of the flow rate, flow area and flow time.

[0038] Among them, Figures 3 to 5 As shown, the top surface and side surfaces of the first annular injection molded part 22 and the top surface of the base 12 enclose a cross-sectional area S3 on the external section, S3 = B*h, wherein B is the width of the slider on the external section 50; h is the height of the top surface of the first annular injection molded part 22 from the top surface of the base 12.

[0039] Specifically, S1≥0.7S3, S2≥0.7S3. This arrangement increases the area of ​​the first injection hole 121 and the area of ​​the second injection hole 122 through which the injection fluid flows, ensuring that the confluence of the injection fluid is not near the first injection hole and the second injection hole, but near the outer edge of the substrate, so that even if cracks occur, the cracks will not extend to the inner cavity of the slider, thereby avoiding leakage.

[0040] Furthermore, preferably, S1≥0.9S3, S2≥0.9S3. Such an arrangement can further ensure that the confluence of the injection fluid is not near the first injection hole and the second injection hole, but near the outer edge of the substrate, so that even if cracks occur, the cracks will not extend to the inner cavity of the slider, thereby avoiding leakage.

[0041] In this embodiment, the first injection hole 121 and the second injection hole 122 each include at least one flow hole. In this solution, the first injection hole 121 may include one flow hole, two flow holes, or multiple flow holes, and the multiple flow holes are arranged on the base 12 at intervals; similarly, the second injection hole 122 may also include one flow hole, two flow holes, or multiple flow holes, and the first injection hole 121 and the second injection hole 122 may be manufactured according to actual needs.

[0042] The shape of the circulation hole is a waist-shaped hole, a round hole, a square hole, or a polygonal hole. In this way, the shape of the circulation hole can be designed into a waist-shaped hole, a round hole, a square hole, or a polygonal hole according to actual needs, wherein the shape of the circulation hole can also be a special-shaped hole (irregular hole). In this solution, if Figure 2 As shown, the shape of the flow hole is a waist-shaped hole, which better fits the shape of the substrate 12.

[0043] Specifically, the base 12 has a plurality of injection grooves 126, and the plurality of injection grooves 126 are spaced apart along the outer periphery of the base 12. The plurality of injection grooves 126 are spaced apart along the outer periphery of the base 12, so that during the injection molding process, they can play a limiting role, so that the injection fluid can better cover the liner body 10, thereby improving the injection molding effect.

[0044] In this embodiment, the base 12 includes an annular plate 123, a first plate 124 and a second plate 125. The annular plate 123 is connected to the outer periphery of the base 11. The first plate 124 and the second plate 125 are respectively arranged at both ends of the annular plate 123. The first plate 124 has a first injection hole 121, and the second plate 125 has a second injection hole 122. The annular plate 123 is provided to match the shape of the base 11 and facilitate connection with the outer periphery of the base 11; the first plate 124 is provided to facilitate the provision of the first injection hole 121; the second plate 125 is provided to facilitate the provision of the second injection hole 122.

[0045] Specifically, the area between the bottom surface of the injection molding body 21, the inner wall of the first annular injection molding part 22 and the top surface of the second annular injection molding part 23 forms a clamping cavity, and the base 12 is embedded in the clamping cavity. The base 12 can be limited by the formed clamping cavity.

[0046] In this embodiment, the base 11 and the base 12 are an integrated structure, and the base 11 and the base 12 are both made of metal or alloy. The base 11 and the base 12 are set as an integrated structure, which is convenient for processing and reduces production costs; in this solution, the base 11 and the base 12 are both made of stainless steel, so that during the injection molding process, since the melting point of stainless steel is higher than the temperature of the injection molding fluid, the base 11 and the base 12 will not melt during the injection molding process.

[0047] The slider further includes a support pin 30, which is disposed in the cavity of the base 11, and the two ends of the support pin 30 are respectively connected to the two opposite inner walls of the base 11. The two ends of the support pin 30 are respectively connected to the two opposite inner walls of the base 11, so that the base 11 will not be deformed during the injection molding process, and can also play a positioning role.

[0048] like Figure 7 As shown, another embodiment of the present invention provides a slider. In this embodiment, there are two flow holes, which are waist-shaped holes.

[0049] Another embodiment of the present invention provides a four-way valve, which includes the above-mentioned slider. With this solution, the ratio of the area S1 of the first injection hole, the area S2 of the second injection hole, the top surface and the side surface of the first annular injection molded part, and the cross-sectional area S3 formed by the top surface of the substrate on the outer section is limited to the range of the above-mentioned volume ratio, so that during the injection molding process, after the injection molding fluid flows through the area S1 of the first injection molding hole, the area S2 of the second injection molding hole, and the cross-sectional area S3, the temperature of the injection molding fluid at the confluence is roughly the same, making it difficult to generate cracks, and the confluence of the above-mentioned injection molding fluid is not near the first injection molding hole and the second injection molding hole, but close to the outer edge of the substrate, so that even if cracks are generated, the cracks will not extend to the inner cavity of the slider, thereby avoiding leakage. With this solution, the service life of the four-way valve can be improved.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments 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 "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0052] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0053] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0054] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A slider, characterized in that: include: A lining body (10), the lining body (10) comprising a base (11) and a matrix (12), the matrix (12) being arranged around the outer periphery of the base (11), and having a first injection hole (121) and a second injection hole (122) respectively penetrating at two ends of the matrix (12); An injection-molded shell (20), wherein the injection-molded shell (20) covers the base (11) and the substrate (12) by injection molding, and the injection-molded shell (20) comprises an injection-molded body (21), a first annular injection-molded part (22), and a second annular injection-molded part (23); the inner wall of the injection-molded body (21) is in contact with the outer wall of the base (11) and the top surface of the substrate (12); the outer wall of the substrate (12) is in contact with the first annular injection-molded part (22); and the bottom surface of the substrate (12) is in contact with the inner wall of the second annular injection-molded part (23); The area of ​​the first injection hole (121) is S1, the area of ​​the second injection hole (122) is S2, the lining body (10) has an inner section (40) and an outer section (50), the inner section (40) and the outer section (50) extend along the width direction of the substrate (12) and are perpendicular to the bottom surface of the substrate (12), the inner section (40) is tangent to the inner wall of the substrate (12), the outer section (50) is tangent to the outer wall of the substrate (12), and the The volume of the first annular injection molded part (22) located on one side of the outer section (50) is V1, the volume of the second annular injection molded part (23) located on the other side of the outer section (50) and between the bottom surface of the base (12) and the inner section (40) is V2, and the area enclosed by the top surface and side surface of the first annular injection molded part (22) and the top surface of the base (12) on the outer section (50) is S3, S1≥(V2 / V1)S3, S2≥(V2 / V1)S3.

2. The slider according to claim 1, characterized in that S1≥0.7S3, S2≥0.7S3.

3. The slider according to claim 1, characterized in that S1≥0.9S3, S2≥0.9S3.

4. The slider according to claim 1, characterized in that The first injection hole (121) and the second injection hole (122) each include at least one flow hole.

5. The slider according to claim 4, characterized in that The shape of the flow hole is a waist-shaped hole, a round hole, a square hole or a polygonal hole.

6. The slider according to claim 1, characterized in that: The base (12) has a plurality of injection molding grooves (126), and the plurality of injection molding grooves (126) are distributed at intervals along the outer periphery of the base (12).

7. The slider according to claim 1, characterized in that The base (12) comprises an annular plate (123), a first plate (124) and a second plate (125); the annular plate (123) is connected to the outer periphery of the base (11); the first plate (124) and the second plate (125) are respectively arranged at two ends of the annular plate (123); the first plate (124) has the first injection hole (121), and the second plate (125) has the second injection hole (122).

8. The slider according to claim 1, characterized in that The area between the bottom surface of the injection molding body (21), the inner wall of the first annular injection molding part (22) and the top surface of the second annular injection molding part (23) forms a clamping cavity, and the base body (12) is embedded in the clamping cavity.

9. The slider according to claim 1, characterized in that The base (11) and the matrix (12) are an integrated structure, and both the base (11) and the matrix (12) are made of metal or alloy.

10. The slider according to claim 1, characterized in that The sliding block further comprises a support pin (30), wherein the support pin (30) is arranged in the cavity of the base (11), and the two ends of the support pin (30) are respectively connected to two opposite inner walls of the base (11).

11. A four-way valve, characterized in that: The four-way valve comprises the slider according to any one of claims 1 to 10.

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