Flow regulating needle valve with anti-dropping function

Abstract

The utility model belongs to valve technical field, concretely relates to a flow regulating needle valve with anti -drop function, this flow regulating needle valve with anti -drop function includes: the valve body is provided with the valve core in it, hand wheel is linked with the valve body, adjusting screw is set up on the valve body, and its one end is connected with the valve core and is inserted into the valve body, and the other end is connected with the hand wheel through linkage assembly, wherein the lateral wall of adjusting screw is sequentially provided with first threaded portion, anti -drop convex ring and second threaded portion from top to bottom, first threaded portion is screwed with the valve body, second threaded portion is screwed with the valve core, and the diameter of anti -drop convex ring is greater than the diameter of first threaded portion, this flow regulating needle valve with anti -drop function realizes the spacing through anti -drop convex ring in the adjusting screw ascending process, namely when anti -drop convex ring abuts against the valve body, the adjusting screw continues to ascend and is limited, so that the hand wheel cannot press the self -locking and even the first threaded portion of adjusting screw is prevented from the situation that thread disengagement thread cooperation occurs.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to regulating valves, and more particularly to a flow regulating needle valve with anti-disengagement function. Background Technology

[0002] In liquid delivery pipelines, flow regulation is required. Currently used manual flow regulating valves basically employ the method of rotating a handwheel to drive the adjusting screw to rotate, thereby adjusting the valve core. By adjusting the gap between the valve core and the valve seat, the purpose of flow regulation is achieved.

[0003] However, when the existing handwheel drives the adjusting screw to rotate, the adjusting screw is prone to excessive adjustment, which can cause the handwheel to fail to lock itself, or even cause the threads of the adjusting screw to disengage.

[0004] Therefore, how to solve the above problems is a problem that urgently needs to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one flow regulating needle valve with anti-detachment function, comprising: a valve body having a valve core disposed therein; a handwheel connected to the valve body; and an adjusting screw disposed on the valve body, one end of which extends into the valve body and is connected to the valve core, and the other end of which is connected to the handwheel via a linkage assembly; wherein the side wall of the adjusting screw is provided with a first threaded portion, an anti-detachment convex ring, and a second threaded portion from top to bottom; the first threaded portion is threadedly engaged with the valve body, the second threaded portion is threadedly engaged with the valve core, and the diameter of the anti-detachment convex ring is larger than the diameter of the first threaded portion.

[0007] In one optional embodiment, the valve body has an installation chamber; wherein the upper end of the installation chamber has a receiving recess; the distance between the first threaded portion and the anti-detachment protrusion is L. A The length of the threaded section that mates with the first threaded portion of the valve body is L. B Among them, the distance L A Length L B .

[0008] In one optional embodiment, the linkage component includes: a linkage sleeve and a connector; wherein the linkage sleeve is coaxially arranged with the adjusting screw; the connector is connected to the adjusting screw and presses the linkage sleeve against the upper end face of the adjusting screw.

[0009] In one optional embodiment, the side wall of the linkage sleeve meshes with the inner wall of the handwheel via a first internal meshing gear pair; the lower end face of the linkage sleeve meshes with the upper end face of the adjusting screw via an end face spline gear pair.

[0010] In one optional embodiment, the linkage assembly includes: a linkage sleeve, a connector, and a spring; wherein the linkage sleeve is coaxially arranged with the adjusting screw; the connector is adapted to pass through the linkage sleeve and connect with the adjusting screw; the spring is sleeved around the connector, and its two ends abut against the linkage sleeve and the connector respectively, so that the linkage sleeve abuts against the upper end face of the adjusting screw.

[0011] In one optional embodiment, the side wall of the linkage sleeve meshes with the inner wall of the handwheel via a first internal meshing gear pair; the lower end face of the linkage sleeve meshes with the upper end face of the adjusting screw via an end face spline gear pair.

[0012] In one optional embodiment, the distance between the upper end face of the linkage sleeve and the pressing part of the connector is H. x The tooth height of the end-face spline gear pair is H. y ; where, distance H x Tooth Height H y .

[0013] In one optional embodiment, the handwheel has a first plug ring and a second plug ring coaxially arranged; wherein the first plug ring is located outside the second plug ring and has a limiting protrusion on its inner wall; a third plug ring is provided on the upper surface of the valve body; wherein the side wall of the third plug ring has a first limiting groove and a second limiting groove from top to bottom; the limiting protrusion is located in the first limiting groove or the second limiting groove.

[0014] In one optional embodiment, the inner wall of the first insertion ring and the side wall of the third insertion ring have a second internal meshing gear pair; wherein when the limiting protrusion is located in the first limiting groove, the second internal meshing gear pair is in a disengaged state; when the limiting protrusion is located in the second limiting groove, the second internal meshing gear pair is in a meshed state.

[0015] In one alternative embodiment, the inner wall of the second insertion ring meshes with the side wall of the linkage sleeve via the first internal meshing gear pair.

[0016] The beneficial effects of this utility model are that the handwheel of the flow regulating needle valve with anti-detachment function drives the regulating screw to rotate through the linkage component. During the rotation of the regulating screw, the regulating screw rises and falls through the first threaded part, thereby driving the valve core to adjust the opening of the flow channel. During the rise and fall of the regulating screw, the anti-detachment convex ring achieves the limit, that is, when the anti-detachment convex ring abuts against the valve body, it restricts the regulating screw from continuing to rise, thereby preventing the handwheel from being unable to press and lock itself, and preventing the first threaded part of the regulating screw from being disengaged from the threaded engagement.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A perspective view of a first type of flow regulating needle valve with anti-detachment function provided in an embodiment of this disclosure; Figure 2 A cross-sectional view of the first type of flow regulating needle valve with anti-detachment function provided in this embodiment of the present disclosure; Figure 3 Provided for the embodiments of this disclosure Figure 2 Enlarged view at point E in the middle; Figure 4 This is a schematic diagram of the structure of a first type of flow regulating needle valve linkage assembly with anti-detachment function provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of the first type of flow regulating needle valve end face spline gear pair with anti-detachment function provided in the embodiments of this disclosure; Figure 6 A perspective view of a second type of flow regulating needle valve with anti-detachment function provided in an embodiment of this disclosure; Figure 7 A cross-sectional view of the second type of flow regulating needle valve with anti-detachment function provided in this embodiment of the present disclosure; Figure 8 This is a schematic diagram of the structure of a second type of flow regulating needle valve linkage assembly with anti-detachment function provided in an embodiment of this disclosure; Figure 9 An exploded view of a second type of flow regulating needle valve with anti-detachment function provided in this embodiment of the present disclosure; Figure 10 A schematic diagram of the valve body structure of a second type of flow regulating needle valve with anti-detachment function provided in this embodiment of the present disclosure; Figure 11 Provided for the embodiments of this disclosure Figure 7 Enlarged view of point F in the middle.

[0021] In the picture: Valve body 1, mounting chamber 10, receiving recess 101, valve core 11, third insertion ring 12, first limiting groove 121, second limiting groove 122, second internal meshing gear pair 123; Handwheel 2, first insertion ring 21, limit protrusion 211, second insertion ring 22; Adjusting screw 3, first threaded part 31, anti-loosening protrusion ring 32, second threaded part 33; Linkage component 4, linkage sleeve 41, first internal meshing gear pair 411, end face spline gear pair 412, connector 42, pressing part 421, spring 43. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the figures, the thickness of parts may be exaggerated or reduced for the purpose of effectively depicting the technical content.

[0024] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] like Figure 1 , Figure 2As shown, at least one embodiment provides a flow regulating needle valve with anti-detachment function, including: a valve body 1, in which a valve core 11 is disposed; a handwheel 2, connected to the valve body 1; an adjusting screw 3, disposed on the valve body 1, one end of which extends into the valve body 1 and is connected to the valve core 11, and the other end is connected to the handwheel 2 through a linkage assembly 4; wherein the side wall of the adjusting screw 3 is provided with a first threaded portion 31, an anti-detachment protrusion ring 32 and a second threaded portion 33 from top to bottom; the first threaded portion 31 is threadedly engaged with the valve body 1, the second threaded portion 33 is threadedly engaged with the valve core 11, and the diameter of the anti-detachment protrusion ring 32 is larger than the diameter of the first threaded portion 31.

[0026] In this embodiment, the handwheel 2 drives the adjusting screw 3 to rotate via the linkage assembly 4. During the rotation of the adjusting screw 3, the adjusting screw 3 moves up and down through the first threaded portion 31, thereby driving the valve core 11 to adjust the opening of the flow channel. During the raising and lowering of the adjusting screw 3, the anti-detachment protrusion ring 32 provides a limit, that is, when the anti-detachment protrusion ring 32 abuts against the valve body 1, it restricts the adjusting screw 3 from continuing to rise, thereby preventing the handwheel from being unable to press and lock itself, and preventing the first threaded portion 31 of the adjusting screw 3 from becoming disengaged from the threaded engagement.

[0027] like Figure 3 As shown, in some embodiments, a mounting chamber 10 is provided inside the valve body 1; wherein a receiving recess 101 is provided at the upper end of the mounting chamber 10; the distance between the first threaded portion 31 and the anti-detachment protrusion 32 is L. A The length of the threaded section that fits the valve body 1 and the first threaded portion 31 is L. B Among them, the distance L A Length L B .

[0028] In this embodiment, during the valve opening process, the anti-detachment protrusion ring 32 moves up and down with the adjusting screw 3 until it enters the receiving recess 101 and abuts against the valve body 1, at which point the valve opening reaches its maximum; simultaneously, due to the distance L A Length L B That is, when the anti-detachment protrusion ring 32 abuts against the valve body 1, the first threaded part 31 is still threadedly connected to the valve body 1, thereby preventing the adjusting screw 3 from disengaging from the threaded connection with the valve body 1.

[0029] like Figure 2 As shown, in some embodiments, the linkage component 4 includes: a linkage sleeve 41 and a connector 42; wherein the linkage sleeve 41 is coaxially arranged with the adjusting screw 3; the connector 42 is connected to the adjusting screw 3 and presses the linkage sleeve 41 against the upper end face of the adjusting screw 3.

[0030] In this embodiment, the connector 42 presses the linkage sleeve 41 against the upper end face of the adjusting screw 3, so that when the linkage sleeve 41 is subjected to force and rotates, it drives the adjusting screw 3 to rotate synchronously.

[0031] like Figure 4 As shown, in some embodiments, the side wall of the linkage sleeve 41 meshes with the inner wall of the handwheel 2 through a first internal meshing gear pair 411.

[0032] In this embodiment, the linkage sleeve 41 rotates synchronously with the handwheel 2 via the first internal meshing gear pair 411.

[0033] like Figure 5 As shown, in some embodiments, the lower end face of the linkage sleeve 41 meshes with the upper end face of the adjusting screw 3 through an end face spline gear pair 412.

[0034] In this embodiment, the adjusting screw 3 rotates synchronously with the linkage sleeve 41 via the end face spline gear pair 412.

[0035] like Figure 4 As shown, in some embodiments, the handwheel 2 has a first insertion ring 21 and a second insertion ring 22 coaxially arranged; wherein, the first insertion ring 21 is located outside the second insertion ring 22, and its inner wall has a limiting protrusion 211; a third insertion ring 12 is provided on the upper surface of the valve body 1; wherein, the side wall of the third insertion ring 12 has a first limiting groove 121 and a second limiting groove 122 from top to bottom; the limiting protrusion 211 is located in the first limiting groove 121 or the second limiting groove 122.

[0036] like Figure 4 As shown, in some embodiments, the inner wall of the first insertion ring 21 and the side wall of the third insertion ring 12 have a second internal meshing gear pair 123; wherein when the limiting protrusion 211 is located in the first limiting groove 121, the second internal meshing gear pair 123 is in a disengaged state; when the limiting protrusion 211 is located in the second limiting groove 122, the second internal meshing gear pair 123 is in a meshed state.

[0037] In some embodiments, the inner wall of the second insertion ring 22 engages with the side wall of the linkage sleeve 41 via a first internal meshing gear pair 411.

[0038] like Figure 6 , Figure 7 As shown, at least one embodiment also provides a flow regulating needle valve with an anti-detachment function, comprising: a valve body 1, in which a valve core 11 is disposed; a handwheel 2, connected to the valve body 1; and an adjusting screw 3 disposed on the valve body 1, one end of which extends into the valve body 1 and is connected to the valve core 11, and the other end of which is connected to the handwheel 2 through a linkage assembly 4; wherein the side wall of the adjusting screw 3 is provided with a first threaded portion 31, an anti-detachment protrusion ring 32, and a second threaded portion 33 from top to bottom; the first threaded portion 31 is threadedly engaged with the valve body 1, the second threaded portion 33 is threadedly engaged with the valve core 11, and the diameter of the anti-detachment protrusion ring 32 is larger than the diameter of the first threaded portion 31.

[0039] In this embodiment, the handwheel 2 drives the adjusting screw 3 to rotate via the linkage assembly 4. During the rotation of the adjusting screw 3, the adjusting screw 3 moves up and down through the first threaded portion 31, thereby driving the valve core 11 to adjust the opening of the flow channel. During the raising and lowering of the adjusting screw 3, the anti-detachment protrusion ring 32 provides a limit, that is, when the anti-detachment protrusion ring 32 abuts against the valve body 1, it restricts the adjusting screw 3 from continuing to rise, thereby preventing the handwheel from being unable to press and lock itself, and preventing the first threaded portion 31 of the adjusting screw 3 from becoming disengaged from the threaded engagement.

[0040] like Figure 7 As shown, in some embodiments, a mounting chamber 10 is provided inside the valve body 1; wherein a receiving recess 101 is provided at the upper end of the mounting chamber 10; the distance between the first threaded portion 31 and the anti-detachment protrusion 32 is L. A The length of the threaded section that fits the valve body 1 and the first threaded portion 31 is L. B Among them, the distance L A Length L B .

[0041] like Figure 3 As shown, in this embodiment, during the valve opening process, the anti-detachment protrusion ring 32 moves up and down with the adjusting screw 3 until it enters the receiving recess 101 and abuts against the valve body 1, at which point the valve opening reaches its maximum; simultaneously, due to the distance L A Length L B That is, when the anti-detachment protrusion ring 32 abuts against the valve body 1, the first threaded part 31 is still threadedly connected to the valve body 1, thereby preventing the adjusting screw 3 from disengaging from the threaded connection with the valve body 1.

[0042] In this embodiment, during the valve opening process, the anti-detachment protrusion ring 32 moves up and down with the adjusting screw 3 until it enters the receiving recess 101 and abuts against the valve body 1. At this time, the valve opening reaches its maximum. At the same time, since the distance A < length B, when the anti-detachment protrusion ring 32 abuts against the valve body 1, the first threaded part 31 is still threadedly connected to the valve body 1, thereby preventing the adjusting screw 3 from disengaging from the threaded connection with the valve body 1.

[0043] like Figure 7 As shown, in some embodiments, the linkage component 4 includes: a linkage sleeve 41, a connector 42, and a spring 43; wherein the linkage sleeve 41 is coaxially arranged with the adjusting screw 3; the connector 42 is adapted to pass through the linkage sleeve 41 and connect with the adjusting screw 3; the spring 43 is sleeved on the periphery of the connector 42, and its two ends abut against the linkage sleeve 41 and the connector 42 respectively, so that the linkage sleeve 41 abuts against the upper end surface of the adjusting screw 3.

[0044] In this embodiment, when the handwheel 2 drives the linkage sleeve 41 to rotate, the linkage sleeve 41 will first move upward to compress the spring 43 until it abuts against the connecting piece 42 when it is under force, and then drive the adjusting screw 3 to rotate synchronously with the handwheel 2. When the handwheel 2 is self-locking, if the handwheel 2 rotates slightly, the linkage sleeve 41 will rotate with the handwheel 2. However, since the linkage sleeve 41 will first rotate and rise to compress the spring 43, the adjusting screw 3 will not rotate during this process, thereby avoiding the change in flow rate caused by the adjusting screw 3 rotating with the handwheel 2.

[0045] like Figure 8 , Figure 9 As shown, in some embodiments, the side wall of the linkage sleeve 41 meshes with the inner wall of the handwheel 2 through a first internal meshing gear pair 411; the lower end face of the linkage sleeve 41 meshes with the upper end face of the adjusting screw 3 through an end face spline gear pair 412.

[0046] like Figure 8 , Figure 9 As shown, in some embodiments, the handwheel 2 has a first insertion ring 21 and a second insertion ring 22 coaxially arranged; wherein, the first insertion ring 21 is located outside the second insertion ring 22, and its inner wall has a limiting protrusion 211; a third insertion ring 12 is provided on the upper surface of the valve body 1; wherein, the side wall of the third insertion ring 12 has a first limiting groove 121 and a second limiting groove 122 from top to bottom; the limiting protrusion 211 is located in the first limiting groove 121 or the second limiting groove 122.

[0047] like Figure 9 , Figure 10 As shown, in some embodiments, the inner wall of the first insertion ring 21 and the side wall of the third insertion ring 12 have a second internal meshing gear pair 123; wherein when the limiting protrusion 211 is located in the first limiting groove 121, the second internal meshing gear pair 123 is in a disengaged state; when the limiting protrusion 211 is located in the second limiting groove 122, the second internal meshing gear pair 123 is in a meshed state.

[0048] like Figure 9 , Figure 10 As shown, in some embodiments, the inner wall of the second insertion ring 22 meshes with the side wall of the linkage sleeve 41 through the first internal meshing gear pair 411.

[0049] like Figure 11 As shown, in some embodiments, the distance between the upper end face of the linkage sleeve 41 and the pressing portion 421 of the connector 42 is H. x The tooth height of the end-face spline gear pair 412 is H. y ; where, distance H x Tooth Height H y .

[0050] In this embodiment, by using distance H x Set to less than tooth height H y This ensures that the end face spline gear pair 412 will not dislodge.

[0051] In summary, the handwheel 2 of this flow regulating needle valve with anti-detachment function drives the regulating screw 3 to rotate through the linkage assembly 4. During the rotation of the regulating screw 3, the regulating screw 3 moves up and down through the first threaded part 31, thereby driving the valve core 11 to adjust the opening of the flow channel. During the up and down movement of the regulating screw 3, the anti-detachment convex ring 32 provides a limit, that is, when the anti-detachment convex ring 32 abuts against the valve body 1, it restricts the regulating screw 3 from continuing to rise, thereby preventing the handwheel from being unable to be pressed and locking itself, and preventing the first threaded part 31 of the regulating screw 3 from becoming disengaged from the threaded engagement.

[0052] In this document, when it is said that the first component is located on the second component, this can mean that the first component can be directly formed on the second component, or that the third component can be inserted between the first component and the second component.

[0053] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0054] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0055] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless clearly stated above otherwise. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0056] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0057] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0058] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless explicitly indicated above. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0059] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0060] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0061] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A flow regulating needle valve with anti-detachment function, characterized in that, include: Valve body (1), wherein a valve core (11) is provided; The handwheel (2) is connected to the valve body (1); The adjusting screw (3) is mounted on the valve body (1), with one end extending into the valve body (1) and connected to the valve core (11), and the other end connected to the handwheel (2) via the linkage assembly (4); The side wall of the adjusting screw (3) is provided with a first threaded part (31), an anti-loosening protrusion ring (32), and a second threaded part (33) from top to bottom. The first threaded part (31) is threadedly engaged with the valve body (1), the second threaded part (33) is threadedly engaged with the valve core (11), and the diameter of the anti-detachment protrusion ring (32) is greater than the diameter of the first threaded part (31).

2. The flow regulating needle valve with anti-detachment function as described in claim 1, characterized in that, The valve body (1) has an installation chamber (10) inside; wherein The upper end of the mounting chamber (10) is provided with a receiving recess (101). The distance between the first threaded portion (31) and the anti-escape convex ring (32) is L A ; The valve body (1) and the first threaded part (31) are adapted to each other with a length of thread L B ; Among them, the distance L A Length L B .

3. The flow regulating needle valve with anti-detachment function as described in claim 1, characterized in that, The linkage component (4) includes: a linkage sleeve (41) and a connector (42); wherein The linkage sleeve (41) is coaxially arranged with the adjusting screw (3); The connector (42) is connected to the adjusting screw (3) and presses the linkage sleeve (41) against the upper end face of the adjusting screw (3).

4. The flow regulating needle valve with anti-detachment function as described in claim 3, characterized in that, The side wall of the linkage sleeve (41) meshes with the inner wall of the handwheel (2) through the first internal meshing gear pair (411); The lower end face of the linkage sleeve (41) meshes with the upper end face of the adjusting screw (3) through an end face spline gear pair (412).

5. The flow regulating needle valve with anti-detachment function as described in claim 1, characterized in that, The linkage component (4) includes: a linkage sleeve (41), a connector (42), and a spring (43); wherein The linkage sleeve (41) is coaxially arranged with the adjusting screw (3); The connector (42) is adapted to pass through the linkage sleeve (41) and connect to the adjusting screw (3); The spring (43) is sleeved around the connector (42), and its two ends abut against the linkage sleeve (41) and the connector (42) respectively, so that the linkage sleeve (41) abuts against the upper end face of the adjusting screw (3).

6. The flow regulating needle valve with anti-detachment function as described in claim 5, characterized in that, The side wall of the linkage sleeve (41) meshes with the inner wall of the handwheel (2) through the first internal meshing gear pair (411); The lower end face of the linkage sleeve (41) meshes with the upper end face of the adjusting screw (3) through an end face spline gear pair (412).

7. The flow regulating needle valve with anti-detachment function as described in claim 6, characterized in that, The distance between the upper end face of the linkage sleeve (41) and the pressing part (421) of the connector (42) is H. x ; The tooth height of the end-face spline gear pair (412) is H. y ; Wherein, distance H x Tooth Height H y .

8. The flow regulating needle valve with anti-detachment function as described in claim 4 or 6, characterized in that, The handwheel (2) has a first plug ring (21) and a second plug ring (22) arranged coaxially. The first plug ring (21) is located outside the second plug ring (22), and its inner wall has a limiting protrusion (211). The upper surface of the valve body (1) is provided with a third plug ring (12). The third insertion ring (12) has a first limiting groove (121) and a second limiting groove (122) on its side wall from top to bottom. The limiting protrusion (211) is located in the first limiting groove (121) or the second limiting groove (122).

9. The flow regulating needle valve with anti-detachment function as described in claim 8, characterized in that, The inner wall of the first insertion ring (21) and the side wall of the third insertion ring (12) have a second internal meshing gear pair (123); wherein When the limiting protrusion (211) is located in the first limiting groove (121), the second internal meshing gear pair (123) is in a disengaged state; When the limiting protrusion (211) is located in the second limiting groove (122), the second internal meshing gear pair (123) is in a meshing state.

10. The flow regulating needle valve with anti-detachment function as described in claim 9, characterized in that, The inner wall of the second insertion ring (22) meshes with the side wall of the linkage sleeve (41) through the first internal meshing gear pair (411).

Images