Valve device

Abstract

One embodiment of the utility model provides a valve device which is characterized in that the valve device comprises a valve body and a valve element, the valve body comprises a valve port part, the valve port part comprises a valve port, the valve device comprises a valve cavity, and the valve element can move in the valve cavity to block or be away from the valve port; the valve port part comprises a valve port abutting part, and the valve port abutting part comprises at least one section of conical surface part; the valve element is provided with a valve element abutting part, the valve element abutting part can abut against at least part of the conical surface part so as to close the valve port, and the material hardness of the valve element abutting part is larger than that of the valve port abutting part. In the embodiment, the valve port abutting part comprises at least one section of conical surface part, the valve element abutting part can abut against the conical surface part, the material hardness of the valve element abutting part is larger than that of the valve port abutting part, during abutting, at least part of the valve element abutting part can be embedded into the conical surface part, and therefore the sealing performance when the valve port is closed is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid control component technical field, concretely relates to a valve device. BACKGROUND

[0002] Please refer to Figure 1 、 2 , Figure 1 is a schematic diagram of a valve device for background technology; Figure 2 is Figure 1 I part enlarged view.

[0003] The valve device includes a valve body 1', the valve body 1' is equipped with valve cavity 1b' and valve port 1a', the bottom of valve body 1' is provided with first interface part 6', and the side is provided with second interface part 7', and the valve body 1' is further equipped with valve core 2' in, valve core 2' can be moved along the axial direction to block or open valve port 1a', to disconnect or intercommunication first interface part 6', second interface part 7'.Valve core 2' is connected with valve body 1' by screw thread, opens valve cap 4', can be rotated by spanner operation valve core 2' and operates, makes valve core 2' can move along the axial direction of valve body. The side wall of valve core 2' is provided with annular groove, and part of sealing ring 3' is contained in annular groove 2b', and sealing ring 3' and the inner wall of valve body 1' cooperate to realize sealing.The inner wall of valve body 1' is provided with clamping groove, and the part of retaining ring 5' is located in the clamping groove, and the limiting of valve core 2' is realized.When operating valve core 2' and displacing upward, it stops by abutting with retaining ring 5'.In the scheme, the lower end of valve core 2' is provided with sealing part 21', and sealing part 21' is generally conical frustum in shape;Valve port 1a' has right-angle step part 11a', and when operating valve core 2' and moving downward to close valve port, since brass material is relatively soft, right-angle step part 11a' abuts with valve core 2' and forms sealing, and valve body 1' is usually made of brass material, and valve core 2' can be made of brass material, or be made of material with greater hardness than brass, such as stainless steel material, when valve core 2' is made of brass material, part of valve port right-angle step can be embedded in the taper surface of valve core 2' to improve sealing effect;And if the valve core is made of harder material such as stainless steel material, the right-angle step part 11a' of the valve port cannot be partially embedded in the taper surface of the valve core 2', and only a face seal can be formed between the two, so if the valve body is deformed under stress, leakage may occur at the matching part between the valve core and the valve port. SUMMARY

[0004] To solve the above technical problems, the valve device provided by the present application can form a better sealing performance between the valve core with relatively greater hardness and the valve port. To this end, at least one embodiment of the present application adopts the following technical solutions:

[0005] A valve device, characterized in that it comprises a valve body, a valve core, the valve body comprises a valve port part, the valve port part comprises a valve port, the valve device comprises a valve cavity, the valve core can move in the valve cavity to block or away from the valve port; the valve port part comprises a valve port abutting part, the valve port abutting part comprises at least one taper part; the valve core is provided with a valve core abutting part, the valve core abutting part can abut with at least part of the taper part to close the valve port, the material hardness of the valve core abutting part is greater than that of the valve port abutting part.

[0006] In the above embodiment, the valve port abutting part comprises at least one taper part, the valve core abutting part can abut with the taper part, and the material hardness of the valve core abutting part is greater than that of the valve port abutting part. When abutting, at least part of the valve core abutting part can be embedded in the taper part, thereby improving the sealing performance when the valve port is closed.

[0007] Another embodiment of the present application adopts the following technical scheme:

[0008] A valve device, characterized in that it comprises a valve body, a valve core, the valve body comprises a valve port part, the valve port part comprises a valve port, the valve device comprises a valve cavity, the valve core can move in the valve cavity to block or away from the valve port; the valve port part comprises a valve port abutting part, the valve port abutting part comprises at least one taper part; the valve core is provided with a valve core abutting part, the valve core abutting part can abut with the taper part to close the valve port, and the included angle of two lines forming the valve core abutting part on any cross section defined by the central axis of the valve core is a cross section included angle β, the cross section included angle β satisfies: 60°≤β≤150°.

[0009] In the above embodiment, the valve port abutting part comprises at least one taper part, the valve core abutting part can abut with the taper part, and the cross section included angle β of the valve core abutting part satisfies: 60°≤β≤150°. The valve core abutting part with the included angle range is beneficial to forming approximate line contact with the taper part of the valve port abutting part, forming indentation in the taper part, thereby improving the sealing performance when the valve port is closed to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 A structural schematic view of a valve device for background technology;

[0011] Figure 2 For Figure 1 An enlarged view of the middle I part.

[0012] Figure 3 A structural cross-sectional view of a valve device of an embodiment of the present application in an open valve state;

[0013] Figure 4 A structural cross-sectional view of a valve device of an embodiment of the present application in a closed valve state;

[0014] Figure 5 This is a cross-sectional view of a valve core structure according to an embodiment of this application;

[0015] Figure 6 for Figure 4 Enlarged view of Part II;

[0016] Figure 7 for Figure 4 Another embodiment of the enlarged view of Part II;

[0017] Figure 8 for Figure 4 Another embodiment of the enlarged view of Part II;

[0018] Figure 9 for Figure 4 Another embodiment of the enlarged view of Part II. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Please refer to Figure 3 , Figure 3 This is a cross-sectional view of the valve device in the open state in one embodiment of this application.

[0021] The valve device includes a valve body 1, and the valve body 1 is provided with a valve chamber 1b. Figure 3 In this embodiment, a first interface portion 6 is provided at one axial end of the valve body 1. The first interface portion 6 is integrally formed with the valve body 1, although they can also be separate. The first interface portion 6 can be connected to an external pipeline 9 or other component interface. The valve body 1 is provided with a valve port portion 1a, which has a valve port 1a1. One axial end of the valve cavity 1b of the valve body 1 can communicate with the valve port 1a1. A second interface portion 8 is also provided on the side of the valve body 1. The second interface portion 8 communicates with the side of the valve cavity 1b. When the valve port 1a1 is in the open state, the first interface portion 6 and the second interface portion 8 can communicate through the valve port. When the valve port 1a1 is closed by the valve core, the first interface portion 6 and the second interface portion 8 are disconnected. In this embodiment, the valve device also has a filling portion 7 on the side. Figure 3 The filling section 7 and the second interface section 8 are arranged radially opposite each other. Of course, the filling section may not be provided.

[0022] like Figure 3 As shown, the valve device in this embodiment also includes a valve core 2, which can move axially within the valve cavity 1b to block or move away from the valve port 1a1, thereby putting the valve port 1a1 in an open or closed state.

[0023] The valve core 2 has an operating end located axially away from the valve port 1a, and the operating end has an operating hole 2a. Figure 3 In this embodiment, the upper end of the valve core 2 has an operating hole 2a. The operating hole 2a is a hole structure used to match an external tool for operating the valve core 2. This operating hole 2a can be, for example, a hexagonal hole, and the external tool can be a hexagonal wrench to rotate the valve core 2. Of course, the operating hole 2a can also have other structures, such as a cross hole. Furthermore, a sealing ring 3 is provided between the valve core 2 and the cavity wall of the valve chamber 1b. The outer peripheral wall of the valve core 2 has an annular groove 2b, and part of the sealing ring 3 is accommodated in the annular groove 2b. Thus, the sealing ring 3 can abut against the annular groove 2b and the cavity wall of the valve chamber 1b to seal the valve core 2 and the valve body 1. In this embodiment, the annular groove 2b of the valve core 2 and the operating hole 2a can be axially offset. This can be combined with... Figure 3 , 5 understand, Figure 5 for Figure 3 A schematic diagram of the valve core structure. The annular groove 2b has a top wall 2b1, a bottom wall 2b3, and a side wall 2b2. The bottom wall 2b3 is the side wall of the annular groove 2b near the valve port 1a1. The top wall 2b1 and the bottom wall 2b3 are opposite each other. The side wall 2b2 connects the top wall 2b1 and the bottom wall 2b3. The opening of the annular groove 2b is opposite to the side wall 2b2. The annular groove 2b and the operating hole 2a are axially offset, so the bottom wall of the operating hole 2a and the top wall 2b1 are axially offset. That is, the bottom wall of the operating hole 2a and the top wall 2b1 of the annular groove 2b have an axial distance H, and H>0.

[0024] With this setting, from Figure 3 It can be seen that the outer annular sidewall corresponding to the operating hole 2a of the valve core 2 does not have an annular groove 2b. That is, on the radial projection of the valve core 2, the operating hole 2a and the annular groove 2b do not coincide. Thus, the wall thickness of the valve core 2 corresponding to the operating hole 2a is not affected by the annular groove 2b. In other words, the wall thickness here only needs to meet the strength requirements for the use of the operating hole 2a. Therefore, under the same product specifications, the outer diameter of the valve core 2 in this embodiment can be relatively reduced. Correspondingly, the size of the valve body 1 that matches it can also be reduced, and the radial dimensions of the sealing ring 3, the valve cap 5 described below, etc., can also be reduced to achieve the purpose of reducing product volume and weight and reducing costs. At the same time, with this structure, the valve core 2 can be made of stainless steel, and the depth of the operating hole 2a can be set relatively shallow, which is beneficial to the processing of the operating hole.

[0025] The outer peripheral wall of the valve core 2 can also be provided with an outer threaded section 2d, and the cavity wall of the valve cavity 1b of the valve body 1 is provided with an inner threaded section, the outer threaded section 2d of the valve core 2 and the inner threaded section of the valve cavity 1b are threadedly matched, the operation hole 2a of the valve core 2 is operated, and the valve core 2 can be driven to rotate, so as to achieve the purpose of axial movement. At this time, the outer threaded section 2d of the valve core 2 is closer to the valve port 1a1 than the annular groove portion 2b, that is, the outer threaded section 2d is arranged below the annular groove portion 2b.

[0026] Please continue to refer to Figure 5 In the embodiment, the radial distance T between the hole wall of the operation hole 2a and the groove side wall 2b2 of the annular groove portion 2b is less than 1 mm. Since the operation hole 2a and the annular groove portion 2b are axially staggered in the embodiment, the strength requirement when the operation hole 2a is operated is no longer subject to the radial distance T between the inner surface of the hole wall of the operation hole 2a and the groove side wall 2b2, so the radial distance T can be as small as possible, and the radial dimension of the valve core 2 can also be as small as possible. On the premise that the overall strength of the valve core 2 is allowed, the radial distance T can also be negative, that is, the hole diameter of the operation hole 2a can be greater than the inner diameter of the annular groove portion 2b. As can be seen, the volume of the valve core 2 in the embodiment can be further reduced, and the volume of the valve body 1 is also correspondingly further reduced.

[0027] As described above, the operation hole 2a can be a hexagonal hole, so as to facilitate cooperation with a conventional tool wrench. In this structure, the height of the operation hole 2a can be set to be less than 1 / 2 of the height of the valve core 2, so that the strength of the operation hole can be ensured, and the part of the valve core below the operation hole has higher strength and torsional resistance performance.

[0028] Further, as Figure 3 shown, the valve body 1 in the embodiment is also provided with a check ring. The check ring can generally be an elastic check ring 5, that is, it has a certain deformation capacity. Specifically, the cavity wall of the valve body 1 is provided with an annular clamping groove 1c, and part of the check ring 5 is located in the clamping groove 1c, so as to facilitate installation. The check ring 5 can be formed by winding a metal wire, and the cross section is circular, so that the processing is simple and batch production is facilitated. The check ring has a notch and can elastically deform towards the inside, so that when the check ring is installed, the check ring can be squeezed to reduce the outer diameter, and the check ring is installed from above the valve body 1 to the bottom. When entering the clamping groove 1c, the check ring elastically deforms again and expands outward, so that the outer diameter increases, and the check ring is limited in the clamping groove 1c.

[0029] On the outer peripheral wall of the valve core 2, above the annular groove 2b, a stepped portion 2c is also provided, meaning the annular groove 2b is closer to the valve port 1a1 than the stepped portion 2c. The stepped portion 2c includes a stepped sidewall 2c1 and a stepped surface 2c2. The stepped surface 2c2 faces away from the annular groove 2b, and is positioned upwards. When the valve is opened, the retaining ring 5 can axially abut against the stepped surface 2c2. In this way, the retaining ring 5 can axially limit the valve core 2, thus limiting its upward movement, ensuring that the valve core 2 is limited when the valve port 1a1 is opened to its maximum degree. This design, while limiting the valve core 2, also facilitates its installation. Figure 3 In this process, the valve core 2 can be directly inserted into the valve cavity 1b of the valve body 1 from top to bottom along the axial direction, and then the retaining ring 5 can be installed. The assembly is relatively simple and quick.

[0030] The valve core 2 has an abutment end 2e at the end furthest from the operating hole 2a, meaning the abutment end 2e and the operating hole 2a are located at opposite ends of the valve core 2. The abutment end 2e includes a valve core abutment portion 2e1, which abuts against the valve port portion 1a to seal the valve port 1a1. Specifically, in one embodiment, as... Figure 6 As shown, the valve port 1a includes a valve port abutment portion 1a2, which includes at least one conical section. The valve core abutment portion 2e1 can abut against at least a portion of the conical section. In the cross-section shown, the cone angle α of the conical section of the valve port abutment portion 1a2 can be in the range of 60°≤α≤150°. Within this range, it is beneficial for the valve core abutment portion 2e1 to cooperate with the valve port abutment portion 1a2. The valve core 2 can be made of a material with higher hardness than the valve port 1a. For example, the valve port 1a can be made of copper, such as brass, and the valve core 2 can be made of stainless steel. More specifically, the valve body 1 can be integrally formed of brass, and the valve port 1a can be directly machined inside the valve body 1, i.e., the valve port 1a and the valve body 1 are an integral structure; alternatively, the valve port 1a and the valve body can be separated, i.e., the valve port 1a is a separate component and fixedly connected to the valve body 1, for example, by welding. Specifically, during installation, the valve port can be inserted from below the valve body 1, mates with the first interface 6, and is then fixed in place. The advantage of separate fixing is that only the valve port portion that mates with the valve core can be made of a material with lower hardness than the valve core, while the remaining parts can be made of a material with higher hardness but lower manufacturing cost, such as stainless steel.

[0031] Because the material hardness of valve core 2 is greater than that of valve port 1a, when valve core 2 is operated and moves downward to abut against valve port 1a, at least a portion of the valve core abutment portion 2e1 of valve core 2 will embed into the surface of valve port abutment portion 1a2, forming an indentation and improving the sealing effect. In a specific embodiment, valve port 1a is made of brass, and valve core 2 is made of stainless steel. Because stainless steel has higher hardness, compared with a valve core made of brass, stainless steel can be used in smaller quantities to achieve the same strength, thus reducing material costs. Alternatively, valve port 1a may not be entirely made of brass; instead, only the portion of valve port abutment portion 1a2 that abuts against valve core 2 may be made of copper.

[0032] The valve core 2's valve core abutment portion 2e1 has a cross-sectional angle, defined as the angle between two lines forming the valve core abutment portion 2e1 on any cross-section passing through the valve core's central axis. For example... Figure 6 The angle β is shown. The value of angle β can be set to 60° ≤ β ≤ 150°. Figure 6 In the illustrated embodiment, β is an approximately right angle. The valve core abutment portion 2e1 abuts against the conical portion of the valve port abutment portion 1a2. Because the valve core material has higher hardness and it presses against the relatively lower hardness conical portion in an approximately line contact manner, it is relatively easy to achieve at least partial embedding of the valve core abutment portion 2e1 into the conical portion, thereby improving the sealing performance when the valve port is closed. The approximately line contact mentioned here is a concept introduced for ease of understanding, as opposed to surface contact, and is not an absolute or theoretical line contact formed by a line and a surface.

[0033] In another embodiment, the value of β can be greater than 90°, such as... Figure 7 As shown, in this embodiment, β can be an obtuse angle, such as 120°. In this structure, the valve core still abuts against the conical portion of the valve core abutting part 2e1 and the valve port abutting part, so that at least a portion of the valve core abutting part 2e1 is embedded in the conical portion, improving the sealing performance. Alternatively, by changing the angle of the conical portion of the valve port abutting part, again β is an obtuse angle, such as 120°, the valve core abuts against the conical portion of the valve port abutting part 2e1, so that at least a portion of the valve core abutting part 2e1 is embedded in the conical portion, such as... Figure 9 As shown.

[0034] In yet another instance, the value of β can be less than 90°, such as... Figure 8 As shown, in this embodiment, β can be an acute angle, such as 60°. In this structure, the included angle of the cross-section of the valve core abutment is smaller than that of the two embodiments described above. When the valve port is closed, it is easier to partially embed into the conical part of the valve port abutment, thereby improving the sealing performance.

[0035] The applicant finds that when the value of the angle β is between 60° and 150°, the valve core abutting portion 2e1 can effectively abut against the valve port abutting portion, and the valve core abutting portion 2e1 can be partially embedded in the conical surface portion to form a better sealing performance. Even when the valve core and the valve port portion are made of the same material, the relative line contact is easy to form, and the valve core abutting portion can still form an indentation on the conical surface portion of the valve port, thereby improving the sealing performance when closing the valve port to a certain extent. In this case, the taper angle α of the conical surface portion can also satisfy: 60°≤α≤150°. In order to improve the sealing performance, the valve core and the valve port portion can be made of a material that is softer than stainless steel and harder than copper. The valve port portion 1a and the valve body 1 can also be made in a split structure and fixedly connected, the material hardness of the valve body 1 is greater than that of the valve port portion, and the valve port portion can be made of the same material as the valve core.

[0036] The valve device can further include a bonnet 4, the bonnet 4 is provided with an internal thread, and the outer peripheral wall of the valve body 1 can be provided with an external thread, the bonnet 4 and the valve body 1 are threadedly connected, Figure 3 Among them, the upper portion of the valve body 1 is provided with an external thread segment and is threadedly connected with the bonnet 4.

[0037] The principles and implementation modes of the present application are described by applying specific examples in the present application, and the above description of the examples is only used to help understand the method of the present application and its core idea. It should be noted that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A valve device, characterized by The valve device comprises a valve body (1) and a valve core (2), the valve body (1) comprises a valve port portion (1a) comprising a valve port (1a1), the valve device comprises a valve cavity (1b), the valve core can move in the valve cavity (1b) to block or move away from the valve port (1a1), the valve port portion (1a) comprises a valve port abutting portion (1a2) comprising at least one taper surface portion, the valve core is provided with a valve core abutting portion (2e1) capable of abutting with the taper surface portion to close the valve port (1a1), the material hardness of the valve core abutting portion (2e1) is greater than that of the valve port abutting portion (1a2).

2. The valve device of claim 1, wherein The taper angle α of the taper surface portion satisfies 60°≤α≤150°, and the included angle of two lines forming the valve core abutting portion (2e1) on any cross section defined by the central axis of the valve core is a cross section included angle β, the cross section included angle β satisfies 60°≤β≤150°.

3. Valve device according to claim 1 or 2, characterized in that The valve core (2) is made of stainless steel material, and the part of the valve port abutting portion (1a2) for abutting with the valve core (2) is made of copper material.

4. The valve device of claim 3, wherein The valve port portion (1a) and the valve body (1) are in an integrated structure, and the valve body (1) is made of copper material as a whole.

5. The valve apparatus of claim 3, wherein The valve port portion (1a) and the valve body (1) are in a split structure, the valve port portion (1a) is fixedly connected with the valve body (1), and the material hardness of the valve body (1) is greater than that of the valve port portion (1a).

6. The valve device of claim 5, wherein The valve body (1) is made of stainless steel material, and the valve port portion (1a) is made of copper material.

7. A valve device characterized by comprising: The valve device comprises a valve body (1) and a valve core (2), the valve body (1) comprises a valve port portion (1a) comprising a valve port (1a1), the valve device comprises a valve cavity (1b), the valve core can move in the valve cavity (1b) to block or move away from the valve port (1a1), the valve port portion (1a) comprises a valve port abutting portion (1a2) comprising at least one taper surface portion, the valve core is provided with a valve core abutting portion (2e1) capable of abutting with the taper surface portion to close the valve port (1a1), the material hardness of the valve core abutting portion (2e1) is greater than that of the valve port abutting portion (1a2).

8. The valve device of claim 7, wherein The taper angle α of the taper surface portion satisfies 60°≤α≤150°, and the included angle of two lines forming the valve core abutting portion (2e1) on any cross section defined by the central axis of the valve core is a cross section included angle β, the cross section included angle β satisfies 60°≤β≤150°.

9. Valve device according to claim 7 or 8, characterized in that The valve core (2) and the valve port portion (1a) are made of the same material. The valve port portion (1a) and the valve body (1) are in a split structure, the valve port portion (1a) is fixedly connected with the valve body (1), and the material hardness of the valve body (1) is greater than that of the valve port portion (1a).

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