Valve device

Abstract

The valve device comprises a valve body and a valve element, the valve body is provided with a valve cavity and a valve port, and the valve element moves in the valve cavity in the axial direction to block or be away from the valve port; an operation hole is formed in the end, away from the valve port, of the valve element in the axial direction. A sealing ring is arranged between the valve element and the cavity wall of the valve cavity, an annular groove part is formed in the peripheral wall of the valve element, part of the sealing ring is contained in the annular groove part, the annular groove part and the operation hole are staggered in the axial direction, and a distance is formed between the bottom wall of the operation hole and the groove top wall of the annular groove part in the axial direction. According to the scheme, the wall thickness of the operation hole is not influenced by the annular groove part for installing the sealing ring, and the cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control components, and in particular to a valve device. Background Art

[0002] Please refer to Figure 4 , 5 , Figure 4 is a schematic diagram of a valve device; Figure 5 for Figure 4 Schematic diagram of the structure of the valve core of the middle valve device.

[0003] The valve device includes a valve body 1', the valve body 1' is provided with a valve cavity 1b' and a valve port 1a', the bottom of the valve body 1' is provided with a first interface part 6', the side is provided with a second interface part 7', and a valve core 2' is also provided in the valve body 1'. The valve core 2' can move axially to block or open the valve port 1a', so as to disconnect or connect the first interface part 6' and the second interface part 7'.

[0004] In addition, an operation hole 2a' is provided at the upper end of the valve core 2', and the valve core 2' is threadedly connected to the valve body 1'. The valve cap 4' can be opened, and the operation hole 2a' can be rotated by a wrench, so that the valve core 2' can move axially. An annular groove 2b' is also provided on the side wall of the valve core 2' corresponding to the operation hole 2a', and a part of the sealing ring 3' is accommodated in the annular groove 2b'. The sealing ring 3' cooperates with the inner wall of the valve body 1' to achieve sealing.

[0005] In this solution, the side wall of the valve core 2' needs to be provided with an operating hole 2a' and an annular groove 2b' for accommodating the sealing ring 3' at the same time. Then, the thickness of the side wall of the valve core 2' at the position of the annular groove 2b' is d, which is the minimum thickness of the valve core 2'. The thinnest position has low strength and is prone to leakage. Therefore, the above-mentioned dimension d is limited by the torsional strength of the valve core 2'. The wall thickness d of the annular groove 2b' cannot be too small, and the corresponding outer diameter of the valve core 2' and the radial dimension of the valve body 1' need to be increased accordingly. If the torsional strength of the valve core 2' is to be increased, the wall thickness of the valve core 2' needs to be increased, that is, it is achieved by increasing the radial dimensions of the valve core 2' and the valve body 1', and the manufacturing cost is relatively high. Summary of the invention

[0006] In order to solve the above technical problems, the present application provides a valve device, in which the wall thickness of the operating hole is not affected by the annular groove portion for installing the sealing ring, thereby reducing costs.

[0007] The valve device provided in the present application includes a valve body and a valve core, the valve body is provided with a valve cavity and a valve port, the valve core moves axially in the valve cavity to block or move away from the valve port; an operating hole is provided at one end of the valve core axially away from the valve port; a sealing ring is provided between the valve core and the cavity wall of the valve cavity, an annular groove is provided on the outer peripheral wall of the valve core, part of the sealing ring is accommodated in the annular groove, the annular groove and the operating hole are staggered in the axial direction, and the bottom wall of the operating hole and the top wall of the annular groove have an axial spacing.

[0008] In the present application, the operating hole and the annular groove of the valve device are staggered in the axial direction, and the wall thickness of the operating hole is not affected by the annular groove. The wall thickness of the operating hole only needs to meet the strength requirements for the use of the operating hole. There is no need to thicken the wall thickness of the operating hole to meet the torsional strength as described in the background technology. Therefore, the outer diameter of the valve core in the present application can be reduced, and accordingly, the size of the valve body matched therewith can also be reduced, so as to achieve the purpose of reducing product volume and weight and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram of a valve device in an embodiment of the present application;

[0010] Figure 2 for Figure 1 Schematic diagram of the structure of the middle valve core;

[0011] Figure 3 for Figure 2 A top view of

[0012] Figure 4 is a schematic diagram of a valve device;

[0013] Figure 5 for Figure 4 Schematic diagram of the structure of the valve core of the middle valve device.

[0014] Figure 1-5 The reference numerals in the drawings are described as follows:

[0015] 1-valve body; 1a-valve port; 1b-valve chamber;

[0016] 2-valve core; 2a-operating hole; 2a1-vertex angle; 2b-annular groove; 2b1-groove top wall; 2b2-groove side wall; 2b3-groove bottom wall; 2c-step portion; 2c1-step side wall; 2c2-step surface; 2d-external thread section; 2e-process hole;

[0017] 3- Sealing ring;

[0018] 4-bonnet; 41-cover part; 42-cylindrical part;

[0019] 5- retaining ring;

[0020] 6-first interface portion;

[0021] 7- filling part;

[0022] 8- second interface portion;

[0023] 9-Pipeline;

[0024] 1'-valve body; 1a'-valve port; 1b'-valve cavity; 2'-valve core; 2a'-operating hole; 2b'-annular groove; 3'-sealing ring; 4'-valve cap; 5'-retaining ring; 6'-first interface part; 7'-second interface part. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Please refer to Figure 1 , Figure 1 Schematic diagram of the valve device in the embodiment of the present application.

[0027] The valve device in this embodiment includes a valve body 1, wherein the valve body 1 is provided with a valve chamber 1b. Figure 1 In the embodiment, a first interface portion 6 is provided at one axial end of the valve body 1. The first interface portion 6 is provided integrally with the valve body 1. Of course, the two can also be provided separately. The first interface portion 6 can be connected to an external pipeline 9 or other component interfaces. The valve body 1 is also provided with a valve port 1a. One end of the valve cavity 1b of the valve body 1 in the axial direction is communicated with the valve port 1a. Specifically, Figure 1 The position where the valve cavity 1b and the first interface portion 6 communicate is the valve port 1a. The side of the valve body 1 is also provided with a second interface portion 8, which communicates with the side of the valve cavity 1b. When the valve port 1a is opened, the first interface portion 6 and the second interface portion 8 can communicate. When the valve port 1a is closed, the first interface portion 6 and the second interface portion 8 are disconnected. In this embodiment, the side of the valve device is also provided with a filling portion 7. Figure 1 The middle filling portion 7 and the second interface portion 8 are arranged opposite to each other in the radial direction.

[0028] like Figure 1 As shown, the valve device in this embodiment further comprises a valve core 2, which can move axially in the valve cavity 1b to block or move away from the valve port 1a, thereby closing or opening the valve port 1a.

[0029] The valve core 2 has an operating hole 2a at one end thereof which is axially away from the valve port 1a. Figure 1In the embodiment, an operation hole 2a is provided at the upper end of the valve core 2. The operation hole 2a is a hole structure used to match an external tool to operate the valve core 2. The operation 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 operation hole 2a can also be other structures, such as a cross hole. In addition, a sealing ring 3 is provided between the valve core 2 and the cavity wall of the valve cavity 1b. An annular groove 2b is provided on the outer peripheral wall of the valve core 2. Part of the sealing ring 3 is accommodated in the annular groove 2b. In this way, the sealing ring 3 can abut between the annular groove 2b and the cavity wall of the valve cavity 1b to seal the valve core 2 and the valve body 1.

[0030] It is worth noting that, in this embodiment, the annular groove portion 2b of the valve core 2 and the operating hole 2a are staggered in the axial direction.

[0031] Can be combined Figure 2 , 3 understand, Figure 2 for Figure 1 A schematic diagram of the structure of the middle valve core 2; Figure 3 for Figure 2 Top view of the .

[0032] Figure 2 In the embodiment, the annular groove portion 2b has a groove top wall 2b1, a groove bottom wall 2b3 and a groove side wall 2b2. The groove bottom wall 2b3 is the side wall of the annular groove portion 2b close to the valve port 1a. The groove top wall 2b1 is arranged opposite to the groove bottom wall 2b3. The groove side wall 2b2 connects the groove top wall 2b1 and the groove bottom wall 2b3. The opening of the annular groove portion 2b is opposite to the groove side wall 2b2. The annular groove portion 2b and the operating hole 2a are staggered in the axial direction, and the bottom wall of the operating hole 2a and the groove top wall 2b1 are staggered in the axial direction, that is, the bottom wall of the operating hole 2a and the groove top wall 2b1 of the annular groove portion 2b have a spacing H in the axial direction, and H>0.

[0033] It should be noted that, in this embodiment, the annular groove portion 2b is described using the terms of groove top wall, groove bottom wall, and groove side wall, which does not mean that the structure of the annular groove portion 2b can only be as follows: Figure 2 For example, the groove top wall 2b1 and the groove bottom wall 2b3 are not necessarily planes, but can also be curved surfaces. When the groove top wall is a curved surface, when measuring the distance between the groove top wall and the bottom wall of the operating hole, the part of the groove top wall closest to the operating hole can be taken as the measurement reference; and the groove side wall 2b2 is not necessarily a cylindrical surface, but can also be an inwardly concave curved surface. When the groove side wall is an inwardly concave curved surface, when measuring the inner diameter of the annular groove, the minimum inner diameter value can be taken as the inner diameter value of the groove side wall.

[0034] So set up, from Figure 2It can be seen that the annular groove 2b is not provided on the outer annular side wall corresponding to the operating hole 2a of the valve core 2, that is, on the radial projection of the valve core 2, the operating hole 2a and the annular groove 2b do not overlap, so that the wall thickness of the valve core 2 corresponding to the operating hole 2a is not affected by the annular groove 2b, that is, the wall thickness here only needs to meet the strength requirement for the use of the operating hole 2a, and there is no need to thicken the wall thickness of the operating hole 2a as described in the background technology. Therefore, under the same product specifications, the outer diameter of the valve core 2 in this embodiment can be relatively reduced, and accordingly, the size of the valve body 1 matched therewith can also be reduced, and the sealing ring 3, the valve cap 5 described below, etc. can reduce the radial size, so as to achieve the purpose of reducing product volume and weight and reducing costs.

[0035] In the above structure, the valve core 2 can be made of stainless steel, and the height of the operating hole 2a is shorter than that of the background technology, which is conducive to the processing of stainless steel. The hardness of stainless steel is greater than that of brass. Therefore, in the same application occasion, such as when the size of the valve port remains unchanged, the outer diameter of the valve core 2 can be made smaller, so that the outer diameter of the corresponding part of the valve body 1 that cooperates with the valve core 2 can also be made smaller, so as to further reduce the manufacturing cost.

[0036] Specifically, the axial spacing H between the bottom wall of the operating hole 2a and the top wall 2b1 of the annular groove 2b can be greater than 1 mm to ensure that the operating hole 2a is not affected by the annular groove 2b when being operated. Of course, the axial spacing H can also be other sizes. Theoretically, as long as H>0, it can be designed according to the actual size of the valve core 2. The axial spacing H can be increased while minimizing the size of the valve core 2. Figure 2 In the embodiment, the operation hole 2a is connected to a process hole 2e below, and the process hole 2e is composed of a straight hole and a tapered hole, and the diameters of the straight hole and the tapered hole are smaller than the diameter of the operation hole 2a, and the process hole 2e may not be provided. That is, it should be noted that the bottom wall of the operation hole recorded in this specification refers to the bottom wall of the part not including the process hole, or in other words, the part that can be abutted with an external tool (such as a hexagonal wrench).

[0037] Please continue to refer to Figure 2In this embodiment, there is a radial spacing T between the hole wall of the operating hole 2a and the groove side wall 2b2 of the annular groove portion 2b, and the radial spacing T is less than 1mm. Since the operating hole 2a and the annular groove portion 2b are staggered in the axial direction in this embodiment, the strength requirement for operating the operating hole 2a is no longer subject to the radial distance T between the inner surface of the hole wall of the operating hole 2a and the groove side wall 2b2, so the radial spacing T can be set as small as possible, and the radial size of the valve core 2 can also be as small as possible. Under the premise that the overall strength of the valve core 2 allows, the radial spacing T can also be a negative number, that is, the aperture of the operating hole 2a can be larger than the inner diameter of the annular groove portion 2b. It can be seen from this that the volume of the valve core 2 in this embodiment can be further reduced, and the volume of the valve body 1 is also further reduced accordingly.

[0038] As mentioned above, the operating hole 2a can be a hexagonal hole, so as to facilitate the cooperation with a conventional tool wrench. When the operating hole 2a is a hexagonal hole, the radial distance T between the top angle 2a1 of the operating hole 2a and the groove side wall 2b2 of the annular groove portion 2b is less than 1 mm. That is, the maximum aperture of the operating hole 2a in this embodiment ( Figure 3 The radial distance T between the inner surface of the hole wall corresponding to the position with the maximum hole diameter (K) and the groove side wall 2b2 of the annular groove portion 2b can be set as small as possible.

[0039] Furthermore, if Figure 1 , 2 As shown, the valve body 1 in this embodiment is also equipped with a retaining ring 5, which generally refers to an elastic retaining ring 5, that is, it has a certain deformation ability. The cavity wall of the valve body 1 can be provided with an annular groove, and the elastic retaining ring 5 can be clamped in the groove, which is easy to install. Of course, it can also be fixed to the valve body 1 by other fixing methods, such as riveting and other conventional connection methods. At this time, the outer peripheral wall of the valve core 2 is also provided with a step portion 2c, and the step surface 2c2 of the step portion 2c is away from the annular groove portion 2b. Figure 2 As can be seen in the figure, the step surface 2c2 of the step portion 2c is arranged toward the upper side. When the valve is opened, the retaining ring 5 can abut against the step surface 2c2 of the step portion 2c in the axial direction. The step portion 2c is farther away from the valve port than the annular groove portion 2b, that is, Figure 2 In the diagram shown, the step 2c is located above the annular groove 2b. In this way, the retaining ring 5 can limit the axial position of the valve core 2 to play the role of upward limit, that is, to ensure that the valve core 2 can be limited when the valve port 1a is opened to the maximum opening. This arrangement not only achieves the premise of limiting the position of the valve core 2, but also facilitates the installation of the valve core 2. Figure 1 In the embodiment, the valve core 2 can be directly installed into the valve cavity 1b of the valve body 1 along the axial direction from top to bottom, and then the retaining ring 5 is installed, so the assembly is relatively simple and fast.

[0040] Please continue to refer to Figure 2In this embodiment, when the step portion 2c is set to cooperate with the retaining ring 5, the outer diameter of the step side wall 2c1 of the step portion 2c is greater than the inner diameter D1 of the annular groove portion 2b, so as to maximize the wall thickness of the operating hole 2a, reduce the impact of the set step portion 2c on the wall thickness of the side wall of the operating hole 2a, and ensure the strength of the side wall of the operating hole 2a. Figure 2 It is shown in the figure that when the step portion 2c is not provided, the wall thickness of the operation hole 2a is D2, D2 is also the outer diameter of the annular groove portion 2b, and the outer diameter of the step side wall 2c1 is between D1 and D2.

[0041] like Figure 1 , 2 As shown, in this embodiment, one end of the valve core 2 away from the valve port 1a protrudes axially from the valve body 1. As mentioned above, in this embodiment, the operating hole 2a and the annular groove 2b are staggered in the axial direction, so the valve core 2 can be extended in the axial direction. In this way, the valve body 1 does not need to be modified in any way, and the valve core 2 only needs to be extended in the axial direction by a certain distance to set the required operating hole 2a. Compared with the entire valve body 1, the change of the valve core 2 is easier to achieve, and the impact on the volume can also be ignored.

[0042] In this embodiment, the valve device may further include a valve cap 4, and the valve cap 4 is provided with an internal thread, such as Figure 1 As shown, the valve bonnet 4 includes a cylindrical portion 42 and a cover portion 41 located at the upper end of the cylindrical portion 42. The inner wall of the cylindrical portion 42 may be provided with an internal thread, and the outer peripheral wall of the valve body 1 may be provided with an external thread. The valve bonnet 4 and the valve body 1 are threadedly connected. Specifically, the cylindrical portion 42 of the valve bonnet 4 is sleeved on the outer side of a portion of the valve body 1 to be threadedly connected with the valve body 1. Figure 1 In the embodiment, the upper part of the valve body 1 is provided with an external thread section, which is threadedly connected with the valve bonnet 4. At this time, the end of the valve core 2 protruding from the valve body 1 can be located in the valve bonnet 4, so that the valve bonnet 4 can protect the valve body 1 and the valve core 2. It can be seen that when the valve bonnet 4 is threadedly connected with the valve body 1, it also has a certain distance from the end face of the valve body 1 in the axial direction, so the internal space of the valve bonnet 4 can accommodate the extended valve core 2, and the size of the valve device in the axial direction remains unchanged, or the valve bonnet 4 can also increase a certain height according to the extension distance of the valve core 2 to accommodate the extended valve core 2. Since the valve bonnet 4 itself has a certain accommodation space, even if the valve bonnet 4 needs to increase in height, the increased height is small, and can be ignored for the overall volume of the valve device.

[0043] In addition, if Figure 1As shown, in this embodiment, the outer peripheral wall of the valve core 2 can also be provided with an external thread section 2d, and the cavity wall of the valve cavity 1b of the valve body 1 is provided with an internal thread section. The external thread section 2d of the valve core 2 and the internal thread section of the valve cavity 1b are threadedly matched, and the operation hole 2a of the valve core 2 is operated to drive the valve core 2 to rotate, thereby achieving the purpose of axial movement. At this time, the external thread section 2d of the valve core 2 is closer to the valve port 1a than its annular groove portion 2b, that is, the external thread section 2d is arranged below the annular groove portion 2b.

[0044] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A valve device, characterized in that: It includes a valve body and a valve core, the valve body is provided with a valve cavity and a valve port, the valve core can move axially in the valve cavity to block or move away from the valve port; an operating hole is provided at one end of the valve core axially away from the valve port; a sealing ring is provided between the valve core and the cavity wall of the valve cavity, an annular groove is provided on the outer peripheral wall of the valve core, part of the sealing ring is accommodated in the annular groove, the annular groove and the operating hole are staggered in the axial direction, and the bottom wall of the operating hole and the groove top wall of the annular groove have a spacing in the axial direction.

2. The valve device according to claim 1, characterized in that The radial distance between the hole wall of the operation hole and the groove side wall of the annular groove portion is less than 1 mm.

3. The valve device according to claim 2, characterized in that The operating hole is a hexagonal hole, and the radial distance between the top angle of the operating hole and the groove side wall of the annular groove portion is less than 1 mm.

4. The valve device according to claim 1, characterized in that The distance between the bottom wall of the operation hole and the top wall of the annular groove portion is greater than 1 mm.

5. The valve device according to any one of claims 1 to 4, characterized in that: The valve body is also provided with a retaining ring, and the outer peripheral wall of the valve core is provided with a step portion, the step surface of the step portion is away from the sealing ring, and when the valve device is in the valve opening state, the retaining ring abuts against the step surface in the axial direction.

6. The valve device according to claim 5, characterized in that An outer diameter of a step side wall of the step portion is greater than an inner diameter of the annular groove portion.

7. The valve device according to any one of claims 1 to 4, characterized in that: One end of the valve core away from the valve port protrudes axially from the valve body.

8. The valve device according to claim 7, characterized in that The valve device further comprises a valve bonnet, the valve bonnet is provided with an internal thread, the valve body is provided with an external thread, the valve bonnet and the valve body are threadedly connected, and a portion of the valve core protruding from the valve body is located inside the valve bonnet.

9. The valve device according to any one of claims 1 to 4, characterized in that: The outer peripheral wall of the valve core is provided with an external thread section, and the external thread section is threadedly matched with the cavity wall of the valve cavity. Compared with the annular groove, the external thread section is closer to the valve port.

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