A sealing umbrella valve and its machining mold

Abstract

This utility model belongs to the field of rubber product manufacturing technology, specifically a sealing umbrella valve, including an umbrella-shaped sealing surface, an intermediate connecting body, and a valve body tail end. The lower end of the umbrella-shaped sealing surface is fixedly connected to the intermediate connecting body, and the lower end of the intermediate connecting body is fixedly connected to the valve body tail end. This utility model also discloses a processing mold for the sealing umbrella valve, including a first mold, a second mold, a third mold, and an adjustment component. Compared with the prior art, this umbrella valve, through its unique structural design, such as a double-curvature curved sealing surface, an optimized intermediate connecting body, and an optimized valve body tail end structure, significantly improves sealing performance, ease of installation, and product stability, and can better meet the needs of high-precision fluid control systems in medical equipment, semiconductor cleanrooms, etc. The processing mold achieves convenient demolding and material unloading through the adjustment component, improving product quality.

Description

[Technical Field]

[0001] This utility model relates to the field of rubber product manufacturing technology, specifically a sealing umbrella valve and its processing mold. [Background Technology]

[0002] In common hospital intravenous infusion systems, umbrella valves are installed in the infusion tubing to control the infusion flow rate and ensure that medications are accurately administered to the patient as prescribed. Nurses can manually adjust the opening of the umbrella valve according to the patient's condition and the characteristics of the medication to achieve initial control over the infusion rate and maintain a smooth infusion process.

[0003] In hemodialysis equipment, umbrella valves are used to regulate the flow rate and circulation path of the dialysate. During dialysis, precise control of the dialysate flow rate into and out of the dialyzer is necessary to ensure efficient and safe exchange of substances between the blood and the dialysate. Umbrella valves can, to some extent, meet this flow control requirement and help maintain the normal operation of dialysis treatment.

[0004] However, medical procedures require extremely high precision in fluid control, and the technical problems of traditional umbrella valves are gradually becoming apparent:

[0005] First, there is the issue of sealing failure. Traditional umbrella valves have a planar sealing surface (see...). Figure 8 Under pressure, local deformation can easily occur, leading to leakage.

[0006] Secondly, another process defect is the uneven wall thickness of the sealing surface of the product, which seriously affects the sealing effect;

[0007] Third, the tail end of the product valve body is too small, making it difficult to install.

[0008] Based on this, this utility model designs a sealing umbrella valve and its processing mold to solve the above problems. [Utility Model Content]

[0009] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a sealing umbrella valve and its processing mold.

[0010] To achieve the above objectives, a sealing umbrella valve is designed, comprising an umbrella-shaped sealing surface, an intermediate connecting body, and a valve body tail end. The lower end of the umbrella-shaped sealing surface is fixedly connected to the intermediate connecting body, and the lower end of the intermediate connecting body is fixedly connected to the valve body tail end.

[0011] The umbrella-shaped sealing surface adopts a double curvature curved surface structure. The lower end of the middle connector is provided with an angle, and the upper end of the middle connector is provided with an arc. The arc and the angle are smoothly connected. The tail end of the valve body adopts a column with an included angle slope, and the bottom surface of the tail end of the valve body is set with an angle.

[0012] Furthermore, the primary radius of curvature of the umbrella-shaped sealing surface is 6.13-6.17 mm, and the secondary radius of curvature is 4.21-4.25 mm. The sealing surface with a radius of 6.15 mm has a high surface finish.

[0013] Furthermore, the radius of the arc of the intermediate connector is 0.5 mm.

[0014] Furthermore, the included angle slope at the tail end of the valve body is 1.5 degrees.

[0015] This utility model provides a processing mold, including a first mold, a second mold, a third mold, and an adjustment component. The first mold and the second mold are in close contact, and the second mold and the third mold are in close contact. The lower end of the first mold and the upper end of the second mold are both connected to the adjustment component. A through groove is provided in the middle of the third mold for the material feed rod to pass through.

[0016] Furthermore, the adjustment assembly includes a push block, a slider, a spring, and a moving block. The interior of the second mold has a slot and a sliding groove, the slot being connected to the sliding groove, and the sliding groove being located at the lower end of the slot. The push block is fixedly installed at the lower end of the first mold. One side of the push block is slidably connected to the side wall of the slot, and the other side of the push block is slidably connected to the inclined end of the slider. The slider is slidably connected to the slot. The inner bottom of the slider is fixedly connected to the moving block. The moving block is located in the sliding groove and slidably connected to the sliding groove. The moving block is fixedly connected to one end of the spring, and the other end of the spring is fixedly connected to the side wall of the sliding groove.

[0017] Furthermore, the push block, slider, spring, and moving block are all equally spaced and arranged on a circle.

[0018] Furthermore, the lower end of the first mold is provided with a cutting edge.

[0019] Furthermore, the outer perimeter of the cutting edge has a reduction of 0.2 mm.

[0020] Furthermore, the blades are arranged in a vertical row of two.

[0021] Compared with the prior art, this utility model has the following advantages:

[0022] (1) The umbrella valve of this utility model has significantly improved sealing performance, installation convenience and product stability through unique structural design, such as double curvature curved sealing surface, optimized intermediate connecting body and valve body tail structure, which can better meet the needs of high-precision fluid control systems such as medical equipment and semiconductor cleanrooms.

[0023] (2) The innovative design of the processing mold of this utility model ensures the stability of product quality and reduces production costs. The lower end of the first mold is provided with a cutting edge, the outer perimeter of which is 0.2mm lower, and the cutting edge is arranged in a vertical row of two. This improved arrangement makes the flow of the rubber material in the processing mold more uniform, so that the wall thickness of the umbrella valve sealing surface of the produced product is uniform, thus solving the problem that uneven wall thickness of the sealing surface affects the sealing effect. [Image Description]

[0024] Figure 1 This is a front view of a sealing umbrella valve according to the present invention;

[0025] Figure 2 This is a cross-sectional view of a sealing umbrella valve according to the present invention;

[0026] Figure 3 This is a perspective view of a processing mold according to the present invention;

[0027] Figure 4 This is a front view of a processing mold according to the present invention;

[0028] Figure 5 For along Figure 4 A sectional view along the AA direction;

[0029] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0030] Figure 7 This is a schematic diagram of the cutting edge;

[0031] Figure 8 This is a schematic diagram of a traditional umbrella valve structure;

[0032] In the figure: 1. Umbrella-shaped sealing surface; 2. Intermediate connecting body; 3. Valve body tail end; 4. First mold; 5. Second mold; 6. Third mold; 7. Adjustment component; 71. Push block; 72. Slider; 73. Groove; 74. Sliding groove; 75. Spring; 76. Moving block; 8. Through groove; 9. Knife edge. [Detailed Implementation]

[0033] The following is in conjunction with the appendix Figure 1 To be continued Figure 8 The present invention will be further described below with reference to specific embodiments:

[0034] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-2 A sealing umbrella valve includes an umbrella-shaped sealing surface 1, an intermediate connecting body 2, and a valve body tail end 3. The lower end of the umbrella-shaped sealing surface 1 is fixedly connected to the intermediate connecting body 2, and the lower end of the intermediate connecting body 2 is fixedly connected to the valve body tail end 3.

[0035] The umbrella-shaped sealing surface 1 is a sealing surface with an umbrella-shaped structure, consisting of two mutually cooperating inner and outer parts. The umbrella-shaped sealing surface 1 has a frustum-shaped or umbrella-like structure, which gradually expands from the center to the edge to form a certain taper. This shape allows the sealing surface to form good line contact or surface contact when in contact, thereby improving the sealing performance.

[0036] The umbrella-shaped sealing surface 1 adopts a double curvature curved surface structure, which mainly refers to the fact that the sealing surface has bending curvature in two different directions.

[0037] The intermediate connecting body 2 is an intermediate valve body. The lower end of the intermediate connecting body 2 is provided with an angle, and the upper end of the angle is provided with an arc. The arc and the angle are smoothly connected. The outward expansion angle of the angle is n = 32 degrees.

[0038] The valve body tail end 3 is a column with an included angle slope, and the bottom surface of the valve body tail end 3 is set at an angle. The outward expansion angle m of the tail end column is 36.9 degrees;

[0039] On the non-planar structure of the umbrella-shaped sealing surface 1, each point has two curvatures in mutually perpendicular directions. The radius corresponding to the maximum curvature is the principal curvature radius, and the radius corresponding to the minimum curvature is the secondary curvature radius.

[0040] The umbrella-shaped sealing surface 1 has a principal curvature radius of X = 6.15 mm and a secondary curvature radius of Y = 4.23 mm. The sealing surface with a radius of 6.15 mm has a high surface finish.

[0041] The radius of the arc of the intermediate connector 2 is 0.5 mm.

[0042] The included angle slope of the tail end 3 of the valve body is 1.5 degrees.

[0043] The umbrella valve is made of high-strength EPDM material with a hardness between 40-45HA, ensuring the durability and stability of the umbrella valve.

[0044] The hyperbolic surface of the umbrella-shaped sealing surface 1 effectively disperses pressure under pressure, thereby significantly improving the sealing performance and wear resistance of the umbrella valve. From a mechanical perspective, when subjected to fluid pressure, the hyperbolic surface can distribute pressure more evenly, avoiding the local deformation problem that easily occurs in traditional planar sealing surfaces. Theoretical calculations and actual simulation tests show that, under the same pressure conditions, the deformation of the hyperbolic sealing surface is lower than that of the traditional planar sealing surface, thus improving the sealing performance. At the same time, the surface smoothness of the sealing surface also effectively improves the wear resistance of the sealing surface and extends the service life of the umbrella valve.

[0045] The intermediate connector 2 features a beveled angle and a 0.5mm radius rounded arc, which facilitates the installation and replacement of the umbrella valve. This design optimizes the connection of other components of the intermediate connector 2. During installation, the beveled angle and rounded arc design better guide the insertion of the intermediate connector 2, reducing resistance and jamming during installation.

[0046] The structural design of the valve body tail end 3 helps to improve the convenience and accuracy of the umbrella valve during assembly. This improved valve body tail end 3 structure increases the contact area with the installation tool or installation part, while the angled design facilitates precise positioning and insertion by the operator.

[0047] Example 2: In some embodiments, such as Figures 3-7 As shown, in a preferred embodiment of the present invention, a processing mold includes a first mold 4, a second mold 5, a third mold 6 and an adjustment component 7. The first mold 4 and the second mold 5 are in close contact, and the second mold 5 and the third mold 6 are in close contact. The lower end of the first mold 4 and the upper end of the second mold 5 are both connected to the adjustment component 7. A through groove 8 is provided in the middle of the third mold 6 for the material feed rod to pass through.

[0048] The lower end of the first mold 4 is provided with a cutting edge, which facilitates the removal of the workpiece as a whole.

[0049] The adjustment assembly 7 includes a push block 71, a slider 72, a spring 75, and a moving block 76. The second mold 5 has a slot 73 and a sliding groove 74 inside. The slot 73 communicates with the sliding groove 74, and the sliding groove 74 is located at the lower end of the slot 73. The push block 71 is fixedly installed at the lower end of the first mold 4. One side of the push block 71 is slidably connected to the side wall of the slot 73, and the other side of the push block 71 is slidably connected to the inclined end of the slider 72. The slider 72 is slidably connected to the slot 73. The inner bottom of the slider 72 is fixedly connected to the moving block 76. The moving block 76 is located in the sliding groove 74 and is slidably connected to the sliding groove 74. The moving block 76 is fixedly connected to one end of the spring 75, and the other end of the spring 75 is fixedly connected to the side wall of the sliding groove 74.

[0050] The push block 71, slider 72, spring 75, and moving block 76 are all equally spaced and arranged on a circle.

[0051] Effect: After the umbrella valve injection molding is completed, the presence of the intermediate connecting body 2 makes it difficult for the umbrella valve injection molding to separate from the mold. Therefore, the present invention designs the structure of the adjusting component 7.

[0052] After the umbrella valve injection molding is completed, the first mold 4 moves upward and separates from the second mold 5. The first mold 4 then drives the push block 71 and the slider 72 to gradually separate. The spring 75 will pull the moving block 76 under the elastic force. Since the moving block 76 is fixedly connected to the slider 72, the slider 72 will also move towards the side wall of the slot 73, so that the slider 72 separates from the umbrella valve injection part. Multiple sliders 72 move to all sides, separate from the umbrella valve injection part, and leave a channel for the umbrella valve injection part to pass through. Under the action of the unloading rod drive device, the unloading rod pushes the umbrella valve injection part out of the mold, completing the unloading.

[0053] The lower end of the first mold 4 is provided with a cutting edge 9.

[0054] The outer periphery of the cutting edge 9 is reduced by 0.2mm, which is beneficial for connecting the cutting edge 9 with the rough edge, allowing the product to be molded as a whole piece, making production smoother and more efficient.

[0055] The blades 9 are arranged in a vertical row of two. This improved arrangement makes the flow of the adhesive material within the processing mold more uniform, resulting in a more uniform wall thickness of the umbrella valve sealing surface in the produced product.

[0056] The contents not described in detail in this specification are existing technologies known to those skilled in the art. The standard parts used can be purchased from the market, and the irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the circuit connection adopts conventional connection methods in the existing technology, which will not be described in detail here.

[0057] This utility model is not limited to the above-described embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this utility model shall be considered equivalent substitutions and shall be included within the protection scope of this utility model.

Claims

1. A seal-type umbrella valve characterized by: It includes an umbrella-shaped sealing surface (1), an intermediate connecting body (2) and a valve body tail end (3). The lower end of the umbrella-shaped sealing surface (1) is fixedly connected to the intermediate connecting body (2), and the lower end of the intermediate connecting body (2) is fixedly connected to the valve body tail end (3). The umbrella-shaped sealing surface (1) adopts a double curvature curved surface structure. The lower end of the intermediate connecting body (2) is provided with an oblique angle. The upper end of the oblique angle of the intermediate connecting body (2) is provided with an arc. The arc and the oblique angle are smoothly connected. The valve body tail end (3) adopts a column with an included angle slope. The bottom surface of the valve body tail end (3) is set with an oblique angle.

2. The sealed umbrella valve of claim 1, wherein: The primary curvature radius of the umbrella-shaped sealing surface (1) is 6.13-6.17 mm, and the secondary curvature radius is 4.21-4.25 mm.

3. The sealed umbrella valve of claim 1, wherein: The radius of the arc of the intermediate connector (2) is 0.5 mm.

4. The seal-type umbrella valve of claim 1, wherein: The included angle slope of the tail end (3) of the valve body is 1.5 degrees.

5. A machining die for machining the sealed umbrella valve of claim 4, characterized in that: It includes a first mold (4), a second mold (5), a third mold (6) and an adjustment component (7). The first mold (4) and the second mold (5) are in close contact, and the second mold (5) and the third mold (6) are in close contact. The lower end of the first mold (4) and the upper end of the second mold (5) are both connected to the adjustment component (7).

6. The processing mold of claim 5, wherein: The third mold (6) has a through groove (8) in the middle.

7. The processing mold according to claim 5, characterized in that: The adjusting assembly (7) includes a push block (71), a slider (72), a spring (75), and a moving block (76). The second mold (5) has a slot (73) and a sliding groove (74) inside. The slot (73) communicates with the sliding groove (74). The sliding groove (74) is located at the lower end of the slot (73). The push block (71) is fixedly installed at the lower end of the first mold (4). One side of the push block (71) slides against the side wall of the slot (73). Next, the other side of the push block (71) is slidably connected to the inclined end of the slider (72), the slider (72) is slidably connected to the slot (73), the inner bottom of the slider (72) is fixedly connected to the moving block (76), the moving block (76) is located in the sliding groove (74) and is slidably connected to the sliding groove (74), the moving block (76) is fixedly connected to one end of the spring (75), and the other end of the spring (75) is fixedly connected to the side wall of the sliding groove (74).

8. The processing mold according to claim 7, characterized in that: The push block (71), slider (72), spring (75), and moving block (76) are all equally spaced and arranged on a circle.

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