Linear flow regulating valve

Abstract

The utility model discloses a flow linear regulating valve. Comprising a valve body, a cavity, an air inlet hole and an air outlet hole are formed in the valve body, the air inlet hole and the air outlet hole are communicated with the cavity, an adjusting assembly is arranged in the cavity and sequentially provided with a valve sleeve and an adjusting block for blocking the cavity in the first direction, and a gap is reserved between the side wall of the valve sleeve and the cavity in the first direction. An adjusting cavity communicated with the air outlet hole is formed in the adjusting assembly, an adjusting seam communicated with the adjusting cavity and the cavity is formed in the side wall of the valve sleeve, the adjusting seam extends in the first direction in a uniform-section mode, and the valve element is arranged in the adjusting cavity in a sealed mode. The adjusting rod comprises an adjusting part connected with the valve element and a driving part located on the side, back on to the valve sleeve, of the adjusting block, and the driving part drives the valve element to be movably arranged in the adjusting cavity in the first direction so as to adjust the shielding length of the adjusting seam by the valve element. According to the flow linear regulating valve, linear regulation of the gas flow is achieved, the regulating precision is improved, conversion and compensation are not needed for flow regulation, and convenience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of flow regulation, and in particular to a flow linear regulating valve. Background Art

[0002] Currently, most gas flow control devices utilize a conical valve mechanism. This valve regulates gas flow based on the following principle: when the supply pressure remains constant (no supersonic flow occurs), the cross-sectional area of the vent is proportional to the flow rate. During operation, the position of the conical valve core within the cavity (moving it forward or backward) changes the cross-sectional area of the vent ring between the conical valve core and the fixed hole outside the conical valve core, thereby achieving gas flow regulation.

[0003] However, in practical use, conical valves present a problem: the curve for the effective cross-sectional area of the vent ring between the valve and the fixed hole during movement is non-linear. Implementing high-precision electronically controlled linear adjustment with this conical needle valve requires conversion and compensation algorithms, a complex process that also compromises adjustment accuracy. Utility Model Content

[0004] The purpose of the present application is to provide a flow linear regulating valve, which can realize linear regulation of gas flow, improve regulation accuracy, and increase convenience by eliminating the need for conversion and compensation for flow regulation.

[0005] 20. The diaphragm of claim 19, wherein the diaphragm has an inwardly oriented surface, and the inwardly oriented surface has a cam portion for activating the diaphragm, the cam portion being an inwardly oriented surface.

[0006] Optionally, the adjustment assembly includes a valve sleeve and an adjustment block, the adjustment block is sealed and installed in the cavity, and the two ends of the valve sleeve along the first direction respectively abut against the end wall of the cavity and the adjustment block; a first sliding cavity is provided in the adjustment block, and a second sliding cavity connected to the air outlet is provided inside the valve sleeve, the first sliding cavity and the second sliding cavity are connected to define the adjustment cavity, and the valve sleeve is provided with the adjustment seam.

[0007] Optionally, an anti-rotation portion for preventing self-rotation is installed on the valve core, the valve core includes a control end, the control end is provided with a threaded hole, and the adjusting portion is provided with an external thread and is threadedly connected in the threaded hole.

[0008] Optionally, an elastic member is provided in the regulating cavity, the elastic member is in a compressed state, and both ends of the elastic member along the compression direction respectively abut or are connected to the control end and the end wall of the first sliding cavity.

[0009] Optionally, the anti-rotation portion includes a ridge or groove located on the outer side surface of the valve core and extending along the first direction, and the inner wall surface of the regulating cavity is provided with a positioning groove or positioning strip along the first direction that is compatible with the ridge or groove.

[0010] Optionally, the regulating block is further provided with a third sliding cavity connected to the first sliding cavity, the inner diameter of the third sliding cavity is larger than the inner diameter of the first sliding cavity and defines a limit step at the connection; the valve sleeve portion is arranged in the third sliding cavity and abuts against the limit step.

[0011] Optionally, a mounting groove is provided on the adjusting block, the driving portion is at least partially located in the mounting groove, and a polygonal driving hole is provided on the driving portion.

[0012] Optionally, a limiting groove is provided on the end wall of the cavity, and a limiting block is provided on the valve sleeve and is clamped in the limiting groove.

[0013] Optionally, a baffle is installed on one end of the valve sleeve abutting against the end wall of the cavity, and a through hole connecting the air outlet and the second sliding cavity is formed on the baffle.

[0014] Optionally, the number of the adjustment slots is at least two, and the at least two adjustment slots are evenly distributed along the circumference of the valve sleeve.

[0015] The above technical solution has the following beneficial effects:

[0016] The flow linear regulating valve provided by the present application has an air inlet hole supplying gas to the cavity of the valve body. The gas enters the regulating cavity through the regulating slit and then is discharged from the valve body through the air outlet hole. The regulating block blocks the cavity and provides support for the regulating rod. The driving part of the regulating rod drives the regulating part to move, and the anti-rotation part of the valve core prevents the valve core from rotating, so that the regulating part drives the valve core to move linearly in the first direction, changing the length of the regulating slit blocked by the valve core in the first direction, achieving the effect of linearly regulating the flow rate. Compared with the prior art, the regulating accuracy is improved, and flow rate regulation does not require conversion and compensation, increasing convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of a flow linear regulating valve according to an embodiment of the present application.

[0018] Figure 2 FIG. is an end view of a flow linear regulating valve according to an embodiment of the present application.

[0019] Figure 3 is Figure 2 a longitudinal sectional view taken along B-B in

[0020] Figure 4 a structural schematic of the regulating slit not shown in the longitudinal sectional view.

[0021] Figure 5 FIG. is a partial sectional view of a flow linear regulating valve according to an embodiment of the present application.

[0022] Figure 6 FIG. is a transverse sectional view of the part where the regulating slit is located in a flow linear regulating valve according to an embodiment of the present application.

[0023] Figure 7 FIG. is a perspective view of a flow linear regulating valve according to an embodiment of the present application.

[0024] Figure 8 FIG. is a longitudinal sectional view of a flow linear regulating valve according to an embodiment of the present application.

[0025] Figure 9 FIG. is a structural schematic of the gas flow direction in a flow linear regulating valve according to an embodiment of the present application.

[0026] REFERENCE NUMERALS

[0027] 1-valve body, 10-cavity, 100-limiting groove, 11-air inlet hole, 12-air outlet hole.

[0028] 2-valve sleeve, 20-second sliding cavity, 21-regulating slit, 22-limiting block, 23-baffle.

[0029] 3-regulating block, 30-first sliding cavity, 31-third sliding cavity, 32-limiting step, 33-mounting groove.

[0030] 4 - valve core, 40 - control end.

[0031] 5 - adjusting rod, 50 - adjusting part, 51 - driving part, 510 - driving hole.

[0032] 6 - elastic part. Specific embodiments

[0033] The specific embodiments of the present utility model will be further described below with reference to the accompanying drawings.

[0034] It is easy to understand that according to the technical solution of the present utility model, under the condition of not changing the essential spirit of the present utility model, there are various structural ways and implementation ways that can be mutually replaced by those of ordinary skill in the art. Therefore, the following specific embodiments and the accompanying drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as all of the present utility model or as a limitation or restriction on the technical solution of the utility model.

[0035] The orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings. They are relative concepts, and therefore may change accordingly depending on their different positions and different usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0036] This application provides a flow linear regulating valve. As Figures 1 to 4 , Figures 7 to 9 shown, the flow linear regulating valve includes: a valve body 1, an adjusting assembly located inside the valve body 1, a valve core 4 and an adjusting rod 5.

[0037] Among them, a cavity 10, an air inlet hole 11 and an air outlet hole 12 communicating with the cavity 10 are formed inside the valve body 1. An adjusting assembly is provided inside the cavity 10. The adjusting assembly is sequentially provided with a valve sleeve 2 and an adjusting block 3 blocking the cavity 10 along a first direction. There is a gap between the side wall of the valve sleeve 2 and the cavity 10 along the first direction. The adjusting block 3 can be installed in the cavity 10 by an interference fit method to block the cavity 10, or a sealing ring is embedded between the adjusting block 3 and the inner wall of the cavity 10 to keep a stable sealing effect between the adjusting block 3 and the cavity 10.

[0038] An adjusting cavity communicating with the air outlet hole 12 is provided inside the adjusting assembly. An adjusting slit 21 communicating the adjusting cavity with the cavity 10 is formed on the side wall of the valve sleeve 2. The adjusting slit 21 extends along the first direction and has an equal cross-section.

[0039] The valve core 4 is sealed in the regulating chamber. The regulating rod 5 includes an adjusting portion 50 connected to the valve core 4 and a driving portion 51 located on the regulating block 3 on the side facing away from the valve sleeve 2. The above position of the driving portion 51 facilitates adjustment of the driving portion 51 by an operator or other mechanical component. The driving portion 51 drives the valve core 4 to move along a first direction in the regulating chamber to adjust the blocking length of the regulating slit 21 by the valve core 4. The blocked portion of the regulating slit 21 is separated from the cavity 10, so that the gas in the cavity 10 cannot pass through the blocked portion. The driving portion 51 can pull the valve core 4 to move, and fix the driving portion 51 after the valve core 4 moves to the desired position, thereby achieving position adjustment of the valve core 4.

[0040] In the embodiment of the present application, a through hole may be provided in the regulating block 3, and the regulating portion 50 may be inserted through the through hole and then mounted on the valve core 4. The first direction may be the axial direction of the cylindrical valve sleeve 2, or the axial direction of the valve core 4, etc. The cross-sectional area of the regulating slit 21 along the first direction is uniform throughout, so that the flow rate of the regulating slit 21 is linearly proportional to the length of the regulating slit 21 along the first direction.

[0041] The flow linear regulating valve provided in the embodiment of the present application is as follows: Figure 9 As shown, the air inlet 11 supplies air to the cavity 10 of the valve body 1, and the gas enters the regulating cavity through the regulating slit 21 and is discharged from the valve body 1 through the air outlet 12. The regulating block 3 seals the cavity 10 and provides support for the regulating rod 5. The driving part 51 of the regulating rod 5 drives the regulating part 50 to move and combines with the anti-rotation part of the valve core 4 to prevent the valve core 4 from rotating. The regulating part 50 drives the valve core 4 to move linearly along the first direction to adjust the length of the valve core 4 blocking the regulating slit 21 along the first direction, thereby achieving the effect of linearly regulating the flow rate. Compared with the existing technology, the regulation accuracy is improved, and the flow regulation does not require conversion and compensation, which increases convenience.

[0042] As an optional embodiment, the regulating assembly includes a valve sleeve 2 and a regulating block 3, the regulating block 3 is sealed and installed in the cavity 10, and the two ends of the valve sleeve 2 along the first direction respectively abut against the end wall of the cavity 10 and the regulating block 3. Figures 3 to 4 As shown, the end wall of the cavity 10 is arranged opposite to the adjustment block 3. The adjustment block 3 is provided with a first sliding cavity 30. The valve sleeve 2 is provided with a second sliding cavity 20 connected to the air outlet 12. The first sliding cavity 30 and the second sliding cavity 20 are connected to define an adjustment cavity of equal diameter. The valve sleeve 2 is provided with an adjustment slot 21. Figure 1 The valve sleeve 2 is stably limited in the cavity 10 by the regulating block 3 to provide stable sliding support for the valve core 4. The regulating block 3 can keep the cavity 10 in a sealed state to prevent the gas in the cavity 10 from escaping through the regulating block 3.

[0043] As an alternative embodiment, an anti-rotation portion for preventing the valve core 4 from rotating is installed on the valve core 4. The valve core 4 includes a control end 40, and a threaded hole is provided in the control end 40. The adjusting portion 50 is provided with an external thread and is threadedly connected in the threaded hole. In the embodiment of the present application, on the basis that the anti-rotation portion prevents the valve core 4 from rotating, by controlling the rotation of the driving portion 51, the adjusting portion 50 is driven to screw out or screw into the threaded hole, so as to drive the valve sleeve 2 to move in the adjusting cavity along the first direction, and adjust the shielding length of the adjusting slit 21. The anti-rotation portion in the embodiment of the present application may be a guide rod slidably disposed in the valve core 4 along the first direction, and one end of the guide rod is fixed in the adjusting block 3.

[0044] As an alternative embodiment, an elastic member 6 is provided in the adjusting cavity. The elastic member 6 is in a compressed state, and both ends of the elastic member 6 in the compression direction respectively abut against or are connected (such as snap connection, bonding, welding, etc.) to the control end 40 and the end wall of the first sliding cavity 30. As Figure 1 shown, the adjusting block 3 fixed in the cavity 10 provides a stable support basis for the elastic member 6. Both ends of the compressed elastic member 6 can respectively abut against the control end 40 and the end wall of the first sliding cavity 30, or are respectively connected to the control end 40 and the end wall of the first sliding cavity 30, so as to increase the stability of the valve core 4 during movement and after movement in place. The elastic member 6 may be an elastic component such as a spring.

[0045] As an alternative embodiment, the anti-rotation portion includes a rib or a groove located on the outer side surface of the valve core 4 and extending along the first direction, and a positioning groove or a positioning strip adapted to the rib or the groove is provided on the inner wall surface of the adjusting cavity along the first direction. The embodiment of the present application includes the following two implementation schemes: the rib located on the valve core 4 is engaged with the positioning groove on the inner wall surface of the adjusting cavity to prevent the valve core 4 from rotating, or the groove located on the valve core 4 is engaged with the positioning strip on the inner wall surface of the adjusting cavity to prevent the valve core 4 from rotating. The above two structural cooperation methods can prevent the valve core 4 from rotating, so that the valve core 4 moves linearly stably under the drive of the adjusting rod 5. As an alternative embodiment, the adjusting block 3 is further provided with a third sliding cavity 31 communicating with the first sliding cavity 30. The inner diameter of the third sliding cavity 31 is larger than the inner diameter of the first sliding cavity 30 and defines a limiting step 32 at the connection. The valve sleeve 2 is partially disposed in the third sliding cavity 31 and abuts against the limiting step 32. As Figures 3 to 4 Figures 8 to 9 shown, the valve sleeve 2 is partially disposed inside the third sliding cavity 31, and the third sliding cavity 31 plays a role in axial and radial limiting.

[0046] As an alternative embodiment, an installation groove 33 is formed on the adjusting block 3, at least a part of the driving part 51 is located in the installation groove 33, and a driving hole 510 with a polygonal shape is formed on the driving part 51. As shown in Figures 3 to 4 , Figures 8 to 9 shown, the installation groove 33 plays a role in hiding and protecting the driving part 51. The polygonal driving hole 510 can be adapted to a polygonal driving handle to rotate under the drive of the driving handle, and then drive the adjusting part 50 to rotate in the threaded hole.

[0047] As an alternative embodiment, a limiting groove 100 is formed on the end wall of the cavity 10, and a limiting block 22 clamped in the limiting groove 100 is arranged on the valve sleeve 2. As shown in Figures 3 to 4 , Figures 7 to 9 shown, the limiting block 22 is clamped in the limiting groove 100, and the limiting groove 100 plays a role in limiting the limiting block 22, thereby increasing the stability of the valve sleeve 2 at one end of the end wall of the cavity 10. In addition, a sealing ring can be embedded between the limiting block 22 and the limiting groove 100 to increase the sealing performance between the valve sleeve 2 and the end wall of the cavity 10. The limiting groove 100 in the embodiment of the present application can be an annular groove, the air outlet hole 12 is located in the annular groove, and the limiting block 22 is an annular block adapted to the annular groove. The embodiment of the present application can limit the limiting block 22 along the circumferential direction of the limiting block 22 to further increase the stability between the valve sleeve 2 and the end wall of the cavity 10.

[0048] As an alternative embodiment, a baffle 23 is installed at one end of the valve sleeve 2 abutted against the end wall of the cavity 10, and a through hole communicating the air outlet hole 12 with the second sliding cavity 20 is formed on the baffle 23. As shown in Figures 3 to 4 , Figures 8 to 9 shown, the baffle 23 increases the structural strength of the valve sleeve 2. The baffle 23 can be the end wall of the valve sleeve 2 and is integrally formed on the valve sleeve 2, and the limiting block 22 in the above embodiment is located on the baffle 23.

[0049] As an alternative embodiment, the number of the adjusting slits 21 is at least two, and at least two of the adjusting slits 21 are evenly distributed along the circumferential direction of the valve sleeve 2. As shown in FIGS. 5 to Figure 7 shown, at least two adjusting slits 21 can make the gas enter evenly along the circumferential direction of the valve sleeve 2, and increase the smoothness of air intake. Figure 6 The number of the adjusting slits 21 shown in FIGS. 5 to 6 is six, which is an alternative embodiment, and the number of the adjusting slits 21 can be flexibly set according to the needs of specific flow rate adjustment.

[0050] According to the needs, the above technical solutions can be combined to achieve the best technical effect.

[0051] The above are only the principles and preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, based on the principles of the present utility model, several other variations can also be made, which should also be regarded as the protection scope of the present utility model.

Claims

1. A flow linear regulating valve, characterized in that include: A valve body is provided with a cavity, an air inlet and an air outlet communicated with the cavity, an adjustment assembly is provided in the cavity, and the adjustment assembly is provided with a valve sleeve and an adjustment block for blocking the cavity in sequence along a first direction, and a space is left between the side wall of the valve sleeve and the cavity along the first direction, wherein; The regulating assembly is provided with a regulating cavity connected to the air outlet, and the side wall of the valve sleeve is provided with a regulating slot connecting the regulating cavity and the cavity body, and the regulating slot extends along the first direction with a uniform cross-section; a valve core, the valve core being sealed in the regulating chamber; The regulating rod includes an regulating portion connected to the valve core and a driving portion located on the side of the regulating block facing away from the valve sleeve. The driving portion drives the valve core to be movably arranged along a first direction in the regulating chamber to adjust the blocking length of the regulating gap by the valve core.

2. The flow linear regulating valve according to claim 1, wherein The regulating assembly includes a valve sleeve and a regulating block, the regulating block is sealed and installed in the cavity, and two ends of the valve sleeve along the first direction respectively abut against the end wall of the cavity and the regulating block; A first sliding cavity is provided in the regulating block, a second sliding cavity communicating with the air outlet is provided inside the valve sleeve, the first sliding cavity and the second sliding cavity are connected to define the regulating cavity, and the regulating slit is provided on the valve sleeve.

3. The flow linear regulating valve according to claim 2, characterized in that, The valve core is provided with an anti-rotation portion for preventing self-rotation. The valve core comprises a control end, a threaded hole is provided in the control end, and the regulating portion is provided with an external thread and is threadedly connected in the threaded hole.

4. The flow linear regulating valve according to claim 3, characterized in that An elastic member is provided in the regulating cavity. The elastic member is in a compressed state. Two ends of the elastic member along the compression direction respectively abut or are connected to the control end and the end wall of the first sliding cavity.

5. The flow linear regulating valve according to claim 3, characterized in that, The anti-rotation portion includes a convex strip or a groove located on the outer side surface of the valve core and extending along the first direction, and the inner wall surface of the regulating cavity is provided with a positioning groove or a positioning strip adapted to the convex strip or the groove along the first direction.

6. The flow linear regulating valve according to claim 2, characterized in that, The adjustment block is further provided with a third sliding cavity connected to the first sliding cavity, the inner diameter of the third sliding cavity is larger than the inner diameter of the first sliding cavity and a limiting step is defined at the connection; The valve sleeve portion is disposed in the third sliding cavity and abuts against the limiting step.

7. The flow linear regulating valve according to any one of claims 1-4, characterized in that, The adjusting block is provided with a mounting groove, the driving portion is at least partially located in the mounting groove, and the driving portion is provided with a polygonal driving hole.

8. The flow linear regulating valve according to any one of claims 1 to 4, characterized in that A limiting groove is provided on the end wall of the cavity, and a limiting block is provided on the valve sleeve and is clamped in the limiting groove.

9. The flow linear regulating valve according to claim 2, wherein A baffle is installed on one end of the valve sleeve abutting against the end wall of the cavity, and a through hole communicating with the air outlet and the second sliding cavity is opened on the baffle.

10. The flow linear regulating valve according to any one of claims 1-4, characterized in that, The number of the adjustment slots is at least two, and the at least two adjustment slots are evenly distributed along the circumference of the valve sleeve.

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