Method for operating a flow regulating needle valve and flow regulating needle valve

Abstract

The application belongs to the technical field of valves, and particularly relates to a working method of a flow regulating needle valve and the flow regulating needle valve. The working method of the flow regulating needle valve comprises the following steps: rotating a hand wheel to drive a linkage mechanism to rotate; driving the linkage mechanism to drive a regulating screw to rotate to regulate a valve core; self-locking by pressing the hand wheel; when the hand wheel is self-locked and gear collision rotation occurs, driving the linkage mechanism to rotate and axially sliding to keep the regulating screw stationary; the working method of the flow regulating needle valve and the flow regulating needle valve are characterized in that the linkage mechanism is arranged on the regulating screw, the hand wheel drives the linkage mechanism to rotate, and then the linkage mechanism drives the regulating screw to rotate to regulate the flow, so that when the hand wheel is pressed to self-lock and gear collision occurs, the linkage mechanism axially slides to self-regulate, thereby avoiding the regulating screw rotating to change the flow.

Description

Technical Field

[0001] This invention belongs to the field of valve technology, specifically relating to regulating valves, and more particularly to a working method of a flow regulating needle valve and the flow regulating needle valve itself. 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] To prevent accidental operation of the handwheel, it will self-lock after adjustment. In related technologies, a pressable handwheel is generally used, that is, by pressing the handwheel, the teeth on the handwheel mesh with the teeth on the valve body, thereby achieving locking.

[0004] However, in the above scenario, because the teeth on the handwheel are disengaged from the teeth on the valve body when adjusting, when the handwheel stops rotating, the teeth on the handwheel and the teeth on the valve body become misaligned. This causes the teeth on the handwheel to collide with the teeth on the valve body when the handwheel is pressed, which in turn causes the handwheel to rotate slightly so that its teeth mesh with the teeth on the valve body. At this time, the adjusting screw will rotate with the handwheel, causing the flow rate to change.

[0005] Therefore, how to solve the technical problem of flow rate change caused by tooth collision during handwheel self-locking is a problem that urgently needs to be solved by those skilled in the art.

[0006] 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. Summary of the Invention

[0007] This disclosure provides at least one method for operating a flow regulating needle valve and the flow regulating needle valve itself.

[0008] In a first aspect, the present disclosure provides at least one method for operating a flow regulating needle valve, comprising: rotating a handwheel to drive a linkage mechanism to rotate; driving an adjusting screw to rotate through the linkage mechanism to adjust the valve core; and pressing the handwheel to self-lock; wherein when a toothed component rotates during the self-locking process of the handwheel, the adjusting screw is kept stationary by driving the linkage mechanism to rotate and slide axially.

[0009] In one optional embodiment, the method of driving the linkage mechanism to rotate by rotating the handwheel includes: engaging the linkage sleeve in the linkage mechanism with the handwheel through a first internal gear pair; and driving the linkage sleeve in the linkage mechanism to rotate by rotating the handwheel.

[0010] In one optional embodiment, the method of adjusting the valve core by driving the adjusting screw to rotate through the linkage mechanism includes: engaging the linkage sleeve in the linkage mechanism with the adjusting screw through a spline gear pair on the end face; connecting the elastic pressing component in the linkage mechanism with the adjusting screw so that the linkage sleeve abuts against the adjusting screw; and when the linkage sleeve rotates, first sliding axially to abut against the connecting part of the elastic pressing component before driving the adjusting screw to rotate to adjust the valve core.

[0011] In one alternative implementation, the pitch of the end-face spline gear pair is greater than the pitch of the second internal meshing gear pair.

[0012] In one optional embodiment, the method of connecting the elastic pressing component in the linkage mechanism to the adjusting screw so that the linkage sleeve abuts against the adjusting screw includes: passing the connecting piece of the elastic pressing component through the linkage sleeve and connecting it to the adjusting screw; sleeve the spring of the elastic pressing component on the connecting piece, and make its two ends abut against the connecting piece and the linkage sleeve respectively, so that the linkage sleeve abuts against the adjusting screw.

[0013] In one optional embodiment, the self-locking method by pressing the handwheel includes: providing a second internal meshing gear pair on the handwheel and the valve body; wherein when the handwheel adjusts the flow rate, the second internal meshing gear pair is in a disengaged state; and when the handwheel is self-locking, pressing the handwheel engages the second internal meshing gear pair.

[0014] In an optional embodiment, in the self-locking method by pressing the handwheel, a limiting protrusion is provided on the handwheel, and a first limiting ring groove and a second limiting ring groove are provided on the side wall of the valve body; the first limiting ring groove is located above the second limiting ring groove; when the handwheel adjusts the flow rate, the limiting protrusion is located in the first limiting ring groove so that the second internal meshing gear pair is in a disengaged state; when the handwheel self-locks, the limiting protrusion is located in the second limiting ring groove so that the second internal meshing gear pair is in a meshed state.

[0015] Secondly, embodiments of this disclosure also provide at least one flow regulating needle valve, comprising: a valve body; an adjusting screw disposed within the valve body; a linkage mechanism comprising: a linkage sleeve and an elastic pressing component, the elastic pressing component being connected to the adjusting screw to abut against the adjusting screw; a handwheel connected to the valve body and the linkage sleeve; wherein the linkage sleeve and the adjusting screw are engaged by an end-face spline gear pair; the handwheel and the linkage sleeve are engaged by a first internal meshing gear pair; a disengaged second internal meshing gear pair is provided between the handwheel and the valve body; the handwheel is adapted to rotate the linkage sleeve to cause the adjusting screw to rotate accordingly; the handwheel is adapted to engage the second internal meshing gear pair for self-locking by pressing down, and simultaneously, when the second internal meshing gear pair engages, the handwheel is adapted to rotate the linkage sleeve to compress the elastic pressing component, causing the end-face spline gear pair to slide axially to bring the adjusting screw to a standstill.

[0016] In one optional embodiment, the elastic pressing assembly includes: a connector and a spring; wherein the connector is adapted to pass through a linkage sleeve and connect to an adjusting screw; the spring is sleeved on the connector and adapted to push the linkage sleeve against the end face of the adjusting screw; when the handwheel is rotated, the linkage sleeve is adapted to follow the rotation of the handwheel to compress the spring and generate axial sliding, and simultaneously drive the adjusting screw to rotate after axially sliding to abut against the connector; the connector is T-shaped, having a vertical connecting portion and a horizontal limiting portion; wherein the spring is sleeved on the connecting portion, and its two ends abut against the limiting portion and the linkage sleeve respectively; when the handwheel is rotated, the linkage sleeve axially slides to abut against the limiting portion and then drives the adjusting screw to rotate.

[0017] In one optional embodiment, the valve body has a first limiting ring groove and a second limiting ring groove on its side wall; the first limiting ring groove is located above the second limiting ring groove; the handwheel has a limiting protrusion on its inner wall; when the handwheel rotates, the limiting protrusion is located in the first limiting ring groove, and the second internal meshing gear pair is in a disengaged state; and when the handwheel is pressed down for self-locking, the limiting protrusion is located in the second limiting ring groove, and the second internal meshing gear pair is in a meshed state; the adjusting screw has a first threaded portion, an anti-disengagement protrusion, and a second threaded portion arranged sequentially from top to bottom on its side wall; 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-disengagement protrusion is larger than the diameter of the first threaded portion.

[0018] The beneficial effect of this invention is that the working method of this flow regulating needle valve and the flow regulating needle valve are achieved by setting a linkage mechanism on the regulating screw. After the handwheel drives the linkage mechanism to rotate, the linkage mechanism drives the regulating screw to rotate to regulate the flow. Thus, when the handwheel is pressed down and self-locking causes tooth knocking, the axial sliding of the linkage mechanism generates self-adjustment, thereby avoiding the situation where the regulating screw is driven to rotate and causes a change in flow.

[0019] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A flowchart illustrating the operation of a flow regulating needle valve provided in this embodiment of the disclosure; Figure 2 This is a schematic diagram of the structure of a flow regulating needle valve provided in an embodiment of the present disclosure; Figure 3 A cross-sectional view of a flow regulating needle valve provided in an embodiment of this disclosure; Figure 4 A schematic diagram of a transmission structure for a handwheel, a linkage sleeve, and an adjusting screw provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of an elastic compression assembly provided in an embodiment of the present disclosure; Figure 6 An exploded view of a handwheel, linkage mechanism, and adjusting screw provided in an embodiment of this disclosure; Figure 7 A cross-sectional view of a handwheel provided in an embodiment of this disclosure; Figure 8 This is a schematic diagram of the structure of a valve body provided in an embodiment of the present disclosure; Figure 9 This is a schematic diagram of an adjusting screw provided in an embodiment of the present disclosure.

[0023] In the picture: Valve body 1, valve core 10, first limiting ring groove 11, second limiting ring groove 12; Adjusting screw 2, first threaded part 21, anti-loosening protrusion ring 22, second threaded part 23; Linkage mechanism 3, linkage sleeve 31, mounting groove 311, elastic pressing component 32, connector 321, connecting part 321a, limiting part 321b, spring 322; Handwheel 4, first insertion ring 41, second insertion ring 42, limiting protrusion ring 421, buckle part 422, protrusion 423; 5. End face spline gear pair; 51. Spline tooth part; 52. Spline groove part; First internal meshing gear pair 6, first internal tooth portion 61, first external tooth portion 62; Second internal meshing gear pair 7, second internal tooth section 71, second external tooth section 72. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] 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.

[0026] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] like Figures 1 to 3 As shown, at least one embodiment provides a method for operating a flow regulating needle valve, including: rotating a handwheel 4 to drive a linkage mechanism 3 to rotate; driving an adjusting screw 2 to rotate via the linkage mechanism 3 to adjust the valve core 10; and pressing the handwheel 4 to self-lock; wherein when a toothed component rotates during the self-locking process of the handwheel 4, the adjusting screw 2 is kept stationary by driving the linkage mechanism 3 to rotate and slide axially.

[0028] Specifically, the adjusting screw 2 is installed inside the valve body 1, with one end extending out of the valve body 1. The adjusting screw 2 adjusts the flow rate by rotating and raising or lowering the valve core 10.

[0029] Specifically, the linkage mechanism 3 includes a linkage sleeve 31 and an elastic pressing component 32. The elastic pressing component 32 is connected to the extended end of the adjusting screw 2 to abut the linkage sleeve 31 against the end face of the adjusting screw 2. The linkage sleeve 31 and the adjusting screw 2 are engaged by an end face spline gear pair 5.

[0030] Specifically, the handwheel 4 is mounted on the valve body 1 and connected to the linkage sleeve 31, and is used to drive the linkage sleeve 31 to rotate; wherein, the handwheel 4 and the linkage sleeve 31 are engaged by the first internal meshing gear pair 6, and a second internal meshing gear pair 7 with disengaged teeth is provided between the handwheel 4 and the valve body 1.

[0031] In this embodiment, when the handwheel 4 rotates, the second internal meshing gear pair 7 is in a disengaged state. At this time, the handwheel 4 drives the linkage sleeve 31 to rotate, thereby causing the adjusting screw 2 to rotate to adjust the flow rate. When the handwheel 4 is pressed to lock, the second internal meshing gear pair 7 will engage. When the second internal meshing gear pair 7 experiences tooth collision during engagement, the handwheel 4 will rotate slightly. At this time, the handwheel 4 drives the linkage sleeve 31 to rotate and causes the end face spline gear pair 5 to slide axially through the compression elastic pressing component 32, thereby preventing the adjusting screw 2 from rotating and thus preventing changes in the flow rate, which greatly improves the flow rate adjustment accuracy.

[0032] like Figure 5 , Figure 6 As shown, in some embodiments, the method of rotating the handwheel 4 to drive the linkage mechanism 3 to rotate includes: engaging the linkage sleeve 31 in the linkage mechanism 3 with the handwheel 4 through the first internal meshing gear pair 6; and rotating the handwheel 4 to drive the linkage sleeve 31 in the linkage mechanism 3 to rotate.

[0033] Specifically, the first internal meshing gear pair 6 includes a first internal tooth portion 61 and a first external tooth portion 62; optionally, the handwheel 4 has a first internal tooth portion 61, and the side wall of the linkage sleeve 31 has a first external tooth portion 62.

[0034] like Figure 5 , Figure 6 As shown, in some embodiments, the method of adjusting the valve core 10 by driving the adjusting screw 2 to rotate through the linkage mechanism 3 includes: engaging the linkage sleeve 31 in the linkage mechanism 3 with the adjusting screw 2 through the end face spline gear pair 5; connecting the elastic pressing component 32 in the linkage mechanism 3 with the adjusting screw 2 so that the linkage sleeve 31 abuts against the adjusting screw 2; when the linkage sleeve 31 rotates, it first slides axially to abut against the connecting piece 321 of the elastic pressing component 32 before driving the adjusting screw 2 to rotate and adjust the flow rate.

[0035] Specifically, the end face spline gear pair 5 includes: a spline tooth portion 51 and a spline groove portion 52; optionally, the end face of the linkage sleeve 31 has a spline tooth portion 51, and the end face of the adjusting screw 2 has a spline groove portion 52.

[0036] In this embodiment, when the handwheel 4 rotates, the linkage sleeve 31 rotates with the handwheel 4 to compress the spring 322 and generate axial sliding. At the same time, after axially sliding to abut against the connecting piece 321, it drives the adjusting screw 2 to rotate. That is, although the linkage sleeve 31 has axially slid, there is a distance limit to the axial sliding, so that the linkage sleeve 31 can still drive the adjusting screw 2 to rotate.

[0037] In some embodiments, the angular pitch of the end face spline gear pair 5 is greater than the angular pitch of the second internal meshing gear pair 7, that is, when the second internal meshing gear pair 7 rotates through one tooth pitch, the end face spline gear pair 5 has not rotated to the full tooth pitch.

[0038] like Figure 5 As shown, in some embodiments, the method of connecting the elastic pressing component 32 in the linkage mechanism 3 to the adjusting screw 2 so that the linkage sleeve 31 abuts against the adjusting screw 2 includes: passing the connecting piece 321 of the elastic pressing component 32 through the linkage sleeve 31 and connecting it to the adjusting screw 2; sleeve the spring 322 of the elastic pressing component 32 on the connecting piece 321, and make both ends abut against the connecting piece 321 and the linkage sleeve 31 respectively, so that the linkage sleeve 31 abuts against the adjusting screw 2.

[0039] like Figure 7 , Figure 8 As shown, in some embodiments, the self-locking method by pressing the handwheel 4 includes: providing a second internal meshing gear pair 7 on the handwheel 4 and the valve body 1; wherein when the handwheel 4 adjusts the flow rate, the second internal meshing gear pair 7 is in a disengaged state; when the handwheel 4 is self-locking, pressing the handwheel 4 engages the second internal meshing gear pair 7.

[0040] Specifically, the second internal meshing gear pair 7 includes: a second internal tooth portion 71 and a second external tooth portion 72; optionally, the handwheel 4 has a second internal tooth portion 71 and the side wall of the valve body 1 has a second external tooth portion 72.

[0041] In some embodiments, the handwheel 4 has a first insertion ring 41 and a second insertion ring 42, the first insertion ring 41 and the second insertion ring 42 are coaxially arranged, and the first insertion ring 41 is located inside the second insertion ring 42; the inner wall of the first insertion ring 41 has a first internal tooth portion 61; the inner wall of the second insertion ring 42 has a second internal tooth portion 71.

[0042] In some embodiments, in the self-locking method by pressing the handwheel 4, a limiting protrusion 421 is provided on the handwheel 4, and a first limiting ring groove 11 and a second limiting ring groove 12 are provided on the side wall of the valve body 1; the first limiting ring groove 11 is located above the second limiting ring groove 12; when the handwheel 4 adjusts the flow rate, the limiting protrusion 421 is located in the first limiting ring groove 11 so that the second internal meshing gear pair 7 is in a disengaged state; when the handwheel 4 self-locks, the limiting protrusion 421 is located in the second limiting ring groove 12 so that the second internal meshing gear pair 7 is in a meshed state.

[0043] In some embodiments, the sidewall of the second insertion ring 42 has a plurality of latching portions 422; wherein the inner wall of the latching portion 422 is provided with a protrusion 423, and each protrusion 423 is adapted to form a limiting protrusion ring 421.

[0044] like Figures 2 to 4 As shown, at least one embodiment provides another flow regulating needle valve, including: valve body 1, regulating screw 2, linkage mechanism 3 and handwheel 4.

[0045] Specifically, the adjusting screw 2 is installed inside the valve body 1, with one end extending out of the valve body 1.

[0046] Specifically, the linkage mechanism 3 includes a linkage sleeve 31 and an elastic pressing component 32. The elastic pressing component 32 is connected to the extended end of the adjusting screw 2 to abut the linkage sleeve 31 against the end face of the adjusting screw 2. The linkage sleeve 31 and the adjusting screw 2 are engaged by an end face spline gear pair 5.

[0047] Specifically, the handwheel 4 is mounted on the valve body 1 and connected to the linkage sleeve 31, and is used to drive the linkage sleeve 31 to rotate; wherein, the handwheel 4 and the linkage sleeve 31 are engaged by the first internal meshing gear pair 6, and a second internal meshing gear pair 7 with disengaged teeth is provided between the handwheel 4 and the valve body 1.

[0048] In this embodiment, when the handwheel 4 rotates, the second internal meshing gear pair 7 is in a disengaged state. At this time, the handwheel 4 drives the linkage sleeve 31 to rotate, thereby causing the adjusting screw 2 to rotate to adjust the flow rate. When the handwheel 4 is pressed to lock, the second internal meshing gear pair 7 will engage. When the second internal meshing gear pair 7 experiences tooth collision during engagement, the handwheel 4 will rotate slightly. At this time, the handwheel 4 drives the linkage sleeve 31 to rotate and causes the end face spline gear pair 5 to slide axially through the compression elastic pressing component 32, thereby preventing the adjusting screw 2 from rotating and thus preventing changes in the flow rate, which greatly improves the flow rate adjustment accuracy.

[0049] like Figure 5 As shown, in some embodiments, the elastic pressing assembly 32 includes a connector 321 and a spring 322.

[0050] Specifically, the connector 321 passes through the linkage sleeve 31 and connects to the end face of the adjusting screw 2.

[0051] Specifically, the spring 322 is sleeved on the connector 321 and is used to push the linkage sleeve 31 against the end face of the adjusting screw 2, so that the end face spline gear pair 5 is in a meshing state.

[0052] In this embodiment, when the handwheel 4 rotates, the linkage sleeve 31 rotates with the handwheel 4 to compress the spring 322 and generate axial sliding. At the same time, after axially sliding to abut against the connecting piece 321, it drives the adjusting screw 2 to rotate. That is, although the linkage sleeve 31 has axially slid, there is a distance limit to the axial sliding, so that the linkage sleeve 31 can still drive the adjusting screw 2 to rotate.

[0053] like Figure 5 As shown, in some embodiments, the connector 321 is T-shaped, having a vertical connecting portion 321a and a horizontal limiting portion 321b.

[0054] Specifically, the spring 322 is sleeved on the connecting part 321a, and its two ends abut against the limiting part 321b and the linkage sleeve 31 respectively.

[0055] In this embodiment, when the handwheel 4 rotates, the linkage sleeve 31 slides axially to abut against the limiting part 321b, thereby driving the adjusting screw 2 to rotate.

[0056] like Figure 5 As shown, in some embodiments, a mounting groove 311 is provided at the axis of the linkage sleeve 31; wherein the spring 322 is located in the mounting groove 311.

[0057] Specifically, the inner diameter of the mounting groove 311 is smaller than the outer diameter of the limiting part 321b.

[0058] In this embodiment, when the linkage sleeve 31 slides axially, since the inner diameter of the mounting groove 311 is smaller than the outer diameter of the limiting part 321b, the linkage sleeve 31 will abut against the limiting part 321b, thereby limiting the retraction distance of the linkage sleeve 31, that is, limiting the end face spline gear pair 5 from completely disengaging.

[0059] like Figure 6 As shown, in some embodiments, the end face spline gear pair 5 includes: a spline tooth portion 51 and a spline groove portion 52.

[0060] Specifically, the end face of the linkage sleeve 31 has a spline tooth portion 51 or a spline groove portion 52; the end face of the adjusting screw 2 has a spline tooth portion 51 or a spline groove portion 52 that is adapted to the linkage sleeve 31.

[0061] like Figure 6 As shown, in some embodiments, the first internal meshing gear pair 6 includes a first internal tooth portion 61 and a first external tooth portion 62.

[0062] Specifically, the handwheel 4 has a first internal toothed portion 61; the side wall of the linkage sleeve 31 has a first external toothed portion 62.

[0063] like Figure 7 , Figure 8 As shown, in some embodiments, the second internal meshing gear pair 7 includes: a second internal tooth portion 71 and a second external tooth portion 72.

[0064] Specifically, the handwheel 4 has a second internal tooth 71; the side wall of the valve body 1 has a second external tooth 72.

[0065] like Figure 7 As shown, in some embodiments, the handwheel 4 has a first insertion ring 41 and a second insertion ring 42.

[0066] Specifically, the first insertion ring 41 and the second insertion ring 42 are coaxially arranged, and the first insertion ring 41 is located inside the second insertion ring 42; the inner wall of the first insertion ring 41 has a first internal tooth portion 61; the inner wall of the second insertion ring 42 has a second internal tooth portion 71.

[0067] like Figure 8 As shown, in some embodiments, the valve body 1 has a first limiting ring groove 11 and a second limiting ring groove 12 on its side wall.

[0068] Specifically, the first limiting ring groove 11 is located above the second limiting ring groove 12; the inner wall of the second insertion ring 42 has a limiting protrusion 421, and the limiting protrusion 421 is located below the second internal tooth portion 71.

[0069] In this embodiment, when the handwheel 4 rotates, the limiting protrusion 421 is located in the first limiting ring groove 11, and the second internal meshing gear pair 7 is in a disengaged state; and when the handwheel 4 is pressed down to self-lock, the limiting protrusion 421 is located in the second limiting ring groove 12, and the second internal meshing gear pair 7 is in a meshed state.

[0070] like Figure 6 As shown, in some embodiments, the sidewall of the second insertion ring 42 has a plurality of snap-fit ​​portions 422.

[0071] Specifically, the inner wall of the latching part 422 is provided with protrusions 423, and each protrusion 423 is adapted to form a limiting protrusion 421.

[0072] like Figure 9 As shown, in some embodiments, the side wall of the adjusting screw 2 is provided with a first threaded portion 21, an anti-disengagement protrusion ring 22, and a second threaded portion 23 from top to bottom; the first threaded portion 21 is threadedly engaged with the valve body 1, the second threaded portion 23 is threadedly engaged with the valve core 10, and the diameter of the anti-disengagement protrusion ring 22 is larger than the diameter of the first threaded portion 21.

[0073] In this embodiment, when the valve is opened, the adjusting screw 2 needs to be rotated. The adjusting screw 2 rises through the presence of the first threaded part 21. In order to prevent the first threaded part 21 from disengaging, an anti-disengagement protrusion ring 22 is provided on the adjusting screw 2. When the anti-disengagement protrusion ring 22 is in contact with the valve body 1, the adjusting screw 2 cannot rotate, thereby ensuring that the first threaded part 21 does not disengage from the valve body 1.

[0074] In summary, the working method of this flow regulating needle valve and the flow regulating needle valve are achieved by setting a linkage mechanism 3 on the regulating screw 2. The handwheel 4 drives the linkage mechanism 3 to rotate, which in turn drives the regulating screw 2 to rotate to regulate the flow. Thus, when the handwheel 4 is pressed down and self-locking occurs, the axial sliding of the linkage mechanism 3 generates self-adjustment, thereby avoiding the situation where the regulating screw 2 rotates and causes a change in flow.

[0075] 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.

[0076] In this document, when an element or layer is referred to as being “located,” “bonded to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, bonded, 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 being “directly on another element or layer,” “directly bonded to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present.

[0077] 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.

[0078] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A method for operating a flow regulating needle valve, characterized in that, include: The handwheel (4) drives the linkage mechanism (3) to rotate; The valve core (10) is adjusted by rotating the adjusting screw (2) through the linkage mechanism (3). When the handwheel (4) is pressed and self-locking is performed, the handwheel (4) rotates due to the impact of the teeth, which drives the linkage mechanism (3) to rotate and slide axially so that the adjusting screw (2) remains stationary; The linkage mechanism (3) includes: a linkage sleeve (31) and an elastic pressing component (32), wherein the elastic pressing component (32) is connected to the adjusting screw (2) so that the linkage sleeve (31) abuts against the adjusting screw (2); The adjusting screw (2) is installed inside the valve body (1), and the handwheel (4) is connected to the valve body (1) and the linkage sleeve (31); The linkage sleeve (31) and the adjusting screw (2) are engaged by the end face spline gear pair (5); The handwheel (4) and the linkage sleeve (31) are engaged by the first internal meshing gear pair (6); A second internal meshing gear pair (7) with teeth removed is provided between the handwheel (4) and the valve body (1). The handwheel (4) is adapted to rotate the linkage sleeve (31) so that the adjusting screw (2) rotates accordingly; The handwheel (4) is adapted to engage the second internal meshing gear pair (7) by pressing down to lock itself. At the same time, when the second internal meshing gear pair (7) hits the teeth, the handwheel (4) is adapted to drive the linkage sleeve (31) to rotate and compress the elastic pressing component (32), so that the end face spline gear pair (5) will slide axially to make the adjusting screw (2) stop.

2. The operating method of the flow regulating needle valve as described in claim 1, characterized in that, The method of driving the linkage mechanism (3) to rotate via the handwheel (4) includes: The linkage sleeve (31) in the linkage mechanism (3) is engaged with the handwheel (4) through the first internal meshing gear pair (6); The handwheel (4) rotates, causing the linkage sleeve (31) in the linkage mechanism (3) to rotate.

3. The operating method of the flow regulating needle valve as described in claim 2, characterized in that, The method of adjusting the valve core (10) by driving the adjusting screw (2) to rotate through the linkage mechanism (3) includes: The linkage sleeve (31) in the linkage mechanism (3) is engaged with the adjusting screw (2) through the end face spline gear pair (5); Connect the elastic pressing component (32) in the linkage mechanism (3) to the adjusting screw (2) so that the linkage sleeve (31) abuts against the adjusting screw (2); When the linkage sleeve (31) rotates, it first slides axially to abut against the connector (321) of the elastic pressing assembly (32) and then drives the adjusting screw (2) to rotate to adjust the valve core (10).

4. The operating method of the flow regulating needle valve as described in claim 3, characterized in that, The pitch of the end face spline gear pair (5) is greater than the pitch of the second internal meshing gear pair (7).

5. The operating method of the flow regulating needle valve as described in claim 3, characterized in that, The elastic pressing assembly (32) includes: a connector (321) and a spring (322); wherein The connector (321) is adapted to pass through the linkage sleeve (31) and connect to the adjusting screw (2); The spring (322) is sleeved on the connector (321), and the two ends of the spring (322) abut against the connector (321) and the linkage sleeve (31) respectively, which is suitable for pushing the linkage sleeve (31) to abut against the end face of the adjusting screw (2); When the handwheel (4) rotates, the linkage sleeve (31) is adapted to follow the rotation of the handwheel (4) to compress the spring (322) to generate axial sliding, and at the same time, after axially sliding to abut against the connecting piece (321), it drives the adjusting screw (2) to rotate; The connector (321) is T-shaped, having a vertical connecting portion (321a) and a horizontal limiting portion (321b); wherein The spring (322) is sleeved on the connecting part (321a), and its two ends abut against the limiting part (321b) and the linkage sleeve (31) respectively; When the handwheel (4) rotates, the linkage sleeve (31) slides axially to abut against the limiting part (321b) and drives the adjusting screw (2) to rotate.

6. The operating method of the flow regulating needle valve as described in claim 1, characterized in that, The method described above, whereby when the handwheel (4) is pressed and self-locking is performed, the handwheel (4) rotates due to the impact of the teeth, thereby driving the linkage mechanism (3) to rotate and slide axially to keep the adjusting screw (2) stationary, includes: A second internal meshing gear pair (7) is provided on the handwheel (4) and the valve body (1); wherein When the flow rate is adjusted by handwheel (4), the second internal meshing gear pair (7) is in the disengaged state; When the handwheel (4) is self-locking, the second internal meshing gear pair (7) is engaged by pressing the handwheel (4).

7. The operating method of the flow regulating needle valve as described in claim 6, characterized in that, In the method described in which the handwheel (4) rotates due to the impact of the tooth when the self-locking is performed after the handwheel (4) is pressed, the linkage mechanism (3) rotates and slides axially to keep the adjusting screw (2) stationary, a limiting protrusion ring (421) is provided on the handwheel (4), and a first limiting ring groove (11) and a second limiting ring groove (12) are provided on the side wall of the valve body (1). The first limiting annular groove (11) is located above the second limiting annular groove (12); When the handwheel (4) adjusts the flow rate, the limiting convex ring (421) is located in the first limiting ring groove (11) so that the second internal meshing gear pair (7) is in the disengaged state; When the handwheel (4) is self-locking, the limiting convex ring (421) is located in the second limiting ring groove (12) so that the second internal meshing gear pair (7) is in the meshing state; The side wall of the adjusting screw (2) is provided with a first threaded part (21), an anti-loosening protrusion ring (22), and a second threaded part (23) from top to bottom. The first threaded part (21) is threadedly engaged with the valve body (1), the second threaded part (23) is threadedly engaged with the valve core (10), and the diameter of the anti-detachment protrusion ring (22) is greater than the diameter of the first threaded part (21).

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