Flow adjusting assembly of adjusting valve and adjusting valve

Abstract

A flow adjusting assembly of an adjusting valve comprises a valve seat (10), a valve plug (20) and an intercepting piece (30). The valve seat is fixedly arranged relative to the valve body of the adjusting valve. The valve seat is in a cylinder shape with one open end and the other closed end, and a hole (11) extending in the circumferential direction of the valve seat is formed in the side wall of the valve seat. The valve plug is in a cylinder shape with one end open and the other end closed and coaxially arranged on the valve seat in a sleeving mode so that the open hole can be shielded from the outer side of the valve seat. The valve plug can move relative to the valve seat in the axial direction (A) of the valve seat so as to adjust the shielding range of the valve plug to the open hole. The cut-off piece can shield the open hole from the inner side of the valve seat. The cut-off piece can rotate around the axis of the valve seat relative to the valve seat so as to adjust the shielding range of the cut-off piece to the open hole. An edge of the closure member that shields the aperture is inserted into the aperture to separate a portion of the aperture that is shielded by the closure member from a portion that is not shielded by the closure member. The flow adjusting assembly is beneficial for improving the flow adjusting precision. The invention further provides a regulating valve.

Description

Technical Field

[0001] The present invention relates to the field of valves, and in particular to a flow regulating component of a regulating valve, and a regulating valve comprising the flow regulating component. Background Art

[0002] The dynamic balancing electric control valve is a product that integrates dynamic balancing function and electric control function. The mechanical dynamic balancing electric control valve can automatically balance the influence of system pressure on flow during the actual operation of the system, so that the output flow characteristic curve is consistent and constant with the ideal flow characteristic curve.

[0003] The dynamic balance electric control valve is provided with a flow regulating component and a pressure differential balancing component, wherein the flow regulating component is used to achieve flow regulation, and the pressure differential balancing component is used to adjust the cut-off area according to pressure changes to ensure that the flow does not change with pressure changes. The flow regulating component of the existing dynamic balance electric control valve cannot meet the requirements for flow regulation accuracy. Summary of the invention

[0004] The object of the present invention is to provide a flow regulating assembly of a regulating valve, which is beneficial to improving the flow regulating accuracy.

[0005] Another object of the present invention is to provide a regulating valve which is conducive to improving flow regulation accuracy.

[0006] The present invention provides a flow regulating assembly of a regulating valve, which includes a valve seat, a valve plug and a shut-off member. The valve seat is fixedly arranged relative to the valve body of the regulating valve. The valve seat is cylindrical with one end open and the other end closed, and has an opening extending along its circumference on its side wall. The valve plug is cylindrical with one end open and the other end closed, and is coaxially sleeved on the valve seat so as to be able to cover the opening from the outside of the valve seat. The valve plug can move relative to the valve seat along the axial direction of the valve seat to adjust the shielding range of the opening. The shut-off member can cover the opening from the inside of the valve seat. The shut-off member can rotate relative to the valve seat around the axis of the valve seat to adjust the shielding range of the opening. The edge of the shut-off member that shields the opening is inserted into the opening to separate the part of the opening that is shielded by the shut-off member and the part that is not shielded by the shut-off member.

[0007] In the flow regulating assembly of the regulating valve, the edge of the flow cutoff member shielding the opening is inserted into the opening and separates the portion of the opening shielded by the flow cutoff member from the portion not shielded by the flow cutoff member, which is beneficial to improving the flow regulating accuracy of the regulating valve.

[0008] In another schematic embodiment of the flow regulating assembly of the regulating valve, the shut-off member includes a rotating ring, a shut-off body and a separator. The valve seat is rotatably arranged around the axis of the valve seat. The shut-off body is arranged in the valve seat and fixedly connected to the rotating ring. The shut-off body is in the shape of an arc-shaped sheet that unfolds along the circumference of the valve seat and has a shut-off surface that extends along the circumference of the valve seat. The shut-off surface fits the inner surface of the valve seat to shield the opening from the inner side of the valve seat. One end of the separator along the circumference of the valve seat is inserted into the edge of the shut-off body that shields the opening along the axial direction of the valve seat. The other end of the separator along the circumference of the valve seat is inserted into the opening to separate the part of the opening that is shielded by the shut-off member and the part that is not shielded by the shut-off member. The shut-off member has a simple structure and good stability.

[0009] In another exemplary embodiment of the flow regulating assembly of the regulating valve, the flow regulating assembly further comprises a support ring. The support ring is fixedly arranged relative to the valve body of the regulating valve and is located on one side of the valve seat close to the open end of the valve seat along the axial direction of the valve seat. The rotating ring has an annular flange. The support ring and the valve seat can abut against the flange relative to each other in a direction parallel to the axis of the valve seat to prevent the rotating ring from moving relative to the valve seat along the axial direction of the valve seat. The structure is simple and easy to assemble.

[0010] In another exemplary embodiment of the flow regulating assembly of the regulating valve, the thickness of the circumferential end of the intercepting body not connected to the partition along the radial direction of the valve seat gradually decreases along the circumference of the valve seat as it approaches the edge of the circumferential end, thereby reducing fluid resistance, reducing valve body vibration and extending service life.

[0011] In another exemplary embodiment of the flow regulating assembly of the regulating valve, the flow regulating assembly further includes a valve stem and a driving member. The valve stem is rotatably inserted in the valve seat around the axis of the valve seat and can move relative to the valve seat along the axial direction of the valve seat. The driving member is fixedly connected to one end of the valve stem inserted into the valve seat. The shut-off member has a slide groove extending along the axial direction of the valve seat. The driving member is slidably inserted in the slide groove along the axial direction of the valve seat. The rotating valve stem can drive the shut-off member to rotate relative to the valve seat through the driving member. In this way, the shut-off member can also be driven to rotate relative to the valve seat when the position of the valve stem along the axial direction of the valve seat changes.

[0012] In another exemplary embodiment of the flow regulating assembly of the regulating valve, the outer surface of the open end of the valve seat has a first abutting surface in an annular shape perpendicular to the axial direction of the valve seat. The open end of the valve plug has a second abutting surface in an annular shape perpendicular to the axial direction of the valve seat and opposite to the first abutting surface. The valve plug can move until the second abutting surface abuts against the first abutting surface to completely cover the opening. This structure is simple and helps prevent fluid leakage when the valve plug is fully closed.

[0013] In another exemplary embodiment of the flow regulating assembly of the regulating valve, the valve seat has an annular groove on the radial inner side of the first abutment surface. The flow regulating assembly also includes an elastic sealing ring embedded in the groove. The valve plug is provided with an annular convex ridge ring protruding on the radial inner side of the second abutment surface. When the valve plug moves to the second abutment surface to abut the first abutment surface, the convex ridge ring presses the elastic sealing ring to form an annular seal. This helps to further prevent fluid leakage when the valve plug is fully closed.

[0014] In another exemplary embodiment of the flow regulating assembly of the regulating valve, the circumferential cross section of the convex ridge ring is a triangle with the tip facing the elastic sealing ring, one side of the triangle is located on the inner circumferential surface of the valve plug for shielding the opening, and the inner circumferential surface of the valve plug for shielding the opening is an inner cylindrical surface. Thereby, when the valve plug is in the open state, the actual interception port is formed by the lower edge of the convex ridge ring, avoiding unnecessary fluid resistance caused by the convex ridge ring. The tip of the triangle is provided with an arc chamfer to prevent the elastic sealing ring from being punctured.

[0015] The present invention also provides a regulating valve, which includes a valve body and a flow regulating assembly as described above. The valve body has a valve cavity. The valve cavity has an inlet channel and an outlet channel. The flow regulating assembly is arranged between the inlet channel and the outlet channel to regulate the flow of fluid entering the outlet channel from the inlet channel. In the regulating valve, the edge of the flow-blocking member of the flow-blocking member shielding the opening is inserted into the opening and separates the portion of the opening shielded by the flow-blocking member and the portion not shielded by the flow-blocking member, which is conducive to improving the flow regulation accuracy of the regulating valve.

[0016] In another exemplary embodiment of the control valve, the control valve is a dynamically balanced electric control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are only used to schematically illustrate and explain the present invention, and do not limit the scope of the present invention.

[0018] Figure 1 A schematic structural diagram of an illustrative implementation of a flow regulating component of a regulating valve.

[0019] Figure 2 for Figure 1 A perspective view of the flow regulating assembly is shown.

[0020] Figure 3 for Figure 1 Exploded view of the flow regulation assembly shown.

[0021] Figure 4 It is a cross-sectional view of the partial structure of the valve seat and the shut-off member.

[0022] Figure 5 Used to indicate the location of the preset cut-off orifice.

[0023] Figure 6 Used to indicate the location of the actual interception orifice.

[0024] Figure 7 Used to display flow experiment results.

[0025] Figure 8 Used to display the combined status of the valve stem, drive and shut-off parts.

[0026] Fig. 9 and Fig.10 It is a cross-sectional view of the valve seat, valve plug and elastic sealing ring.

[0027] Fig.11 for Fig.10 Enlarged view of the middle V section.

[0028] Description of symbols

[0029] 10 Valve seat

[0030] 11 Opening

[0031] 12 first abutment surface

[0032] 13 grooves

[0033] 20 valve plug

[0034] 22 second abutment surface

[0035] 24 convex ring

[0036] 26 Inner circumferential surface of valve plug

[0037] 30 shut-off pieces

[0038] 31 Rotating Ring

[0039] 313 flange

[0040] 32 Interception body

[0041] 321 cut-off surface

[0042] 322 chute

[0043] 323 Circumferential end

[0044] 34 separators

[0045] 341 end face

[0046] 50 support ring

[0047] 60 valve stem

[0048] 70 drive parts

[0049] 80 elastic sealing ring

[0050] 90 valve body

[0051] 91 Valve chamber

[0052] 911 Entryway

[0053] 912 Exit Channel

[0054] 93 differential pressure balance assembly

[0055] 94 valve cover

[0056] A Axial direction of valve seat

[0057] C Circumference of valve seat

[0058] L Valve seat axis

[0059] K1 Preset Cutoff

[0060] K2 actual cut-off point DETAILED DESCRIPTION

[0061] In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific embodiments of the present invention are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.

[0062] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0063] In this article, "first", "second", etc. do not indicate their importance or order, but are only used to indicate the difference between each other for the convenience of document description.

[0064] In order to simplify the drawings, each figure only schematically shows the parts related to the present invention, which do not represent the actual structure of the product.

[0065] Figure 1 FIG. 1 is a schematic structural diagram of an exemplary embodiment of a flow control component of a control valve. The control valve is, for example, a mechanical dynamic balance electric control valve, but is not limited thereto. Figure 1 As shown, the regulating valve includes, for example, a valve body 90. The valve body 90 has a valve chamber 91. The valve chamber 91 has an inlet channel 911 and an outlet channel 912. The flow regulating component is arranged between the inlet channel 911 and the outlet channel 912 to regulate the flow of the fluid from the inlet channel 911 into the outlet channel 912.

[0066] like Figure 1 As shown, the flow regulating assembly includes a valve seat 10, a valve plug 20 and a shut-off member 30. The valve seat 10 is fixedly arranged relative to the valve body 90 of the regulating valve. Figure 2and Figure 3 They are Figure 1 The flow control assembly is shown in a perspective view and an exploded view. Figure 2 and Figure 3 As shown, the valve seat 10 is cylindrical with one end open and the other end closed, and has an opening 11 extending along its circumferential direction C on its side wall. The opening 11 here is interpreted as a hole with a depth along the radial direction of the valve seat 10. The inner circumferential surface and the outer circumferential surface of the valve seat 10 forming the opening 11 are both cylindrical surfaces. Figure 3 In the embodiment, the lower end of the valve seat 10 is its open end, and the fluid entering the valve seat 10 through the opening 11 can flow out through the open port of the open end. It should be noted that the closed end of the valve seat 10 does not only include the situation that the valve seat 10 is closed by itself. In the present exemplary embodiment, the valve seat 10 cooperates with other structures to achieve the closure of its closed end. Specifically, the valve seat 10 has a hole for the valve stem 60 to pass through, and the valve stem 60 passes through the hole and closes the hole.

[0067] like Figure 2 and Figure 3 As shown, the valve plug 20 is cylindrical with one end open and the other end closed and is coaxially sleeved on the valve seat 10 so as to be able to shield the opening 11 from the outside of the valve seat 10. The inner circumferential surface of the valve plug 20 for shielding the opening 11 is an inner cylindrical surface. Figure 3 In the embodiment, the lower end of the valve plug 20 is its open end, and the valve seat 10 is inserted into the valve plug 20 through the open end. The valve plug 20 can move relative to the valve seat 10 along the axial direction A of the valve seat 10 to adjust the shielding range of the opening 11. It should be noted that the closed end of the valve plug 20 does not only include the case where the valve plug 20 is closed by itself. In this exemplary embodiment, the valve plug 20 cooperates with other structures to achieve the closure of its closed end. Specifically, the valve plug 20 has a hole for the valve stem 60 to pass through, and the valve stem 60 passes through the hole and closes the hole.

[0068] like Figure 2 and Figure 3 As shown, the shutoff member 30 can shield the opening 11 from the inner side of the valve seat 10. The shutoff member 30 can rotate relative to the valve seat 10 around the axis L of the valve seat 10 to adjust the shielding range of the opening 11. The shutoff member 30 has a maximum shielding range of 180°, for example. The edge of the shutoff member 30 shielding the opening 11 is inserted into the opening 11 to separate the portion of the opening 11 shielded by the shutoff member 30 and the portion not shielded by the shutoff member 30. When in use, the shutoff member 30 is used, for example, to preset the flow rate, and the valve plug 20 is used, for example, to adjust the flow rate in real time.

[0069] Specifically, Figure 2As shown, in this exemplary embodiment, the shutoff member 30 is provided with a partition 34 at its edge covering the opening 11 , and the partition 34 is inserted into the opening 11 to separate the portion of the opening 11 covered by the shutoff member 30 from the portion not covered by the shutoff member 30 . Figure 4 This is a cross-sectional view of the valve seat and the shut-off member. Figure 4 , wherein the portion of the opening 11 located on the left side of the partition 34 is the portion not covered by the shutoff member 30, and the portion of the opening 11 located on the right side of the partition 34 is the portion covered by the shutoff member 30. Figure 5 The partition 34 and the valve seat 10 can enclose a preset cut-off opening K1 extending along the circumferential direction C of the valve seat 10 (see Figure 5 The fluid entering the preset cut-off port K1 will not flow into the portion of the opening 11 shielded by the cut-off member 30, and the fluid entering the portion of the opening 11 shielded by the cut-off member 30 will not enter the valve seat 10 because it is blocked by the partition 34. Figure 6 As shown, the valve plug 20 shields one end of the preset cut-off opening K1 along the axial direction A of the valve seat 10 ( Figure 6 The upper end of the throttle opening K2 is formed on the basis of the preset throttle opening K1 (see Figure 6 The valve plug 20 can adjust the area of ​​the actual cut-off opening K2 by moving relative to the valve seat 10 along the axial direction A of the valve seat 10. According to the geometric principle, the stroke of the valve plug 20 along the axial direction A of the valve seat 10 is linearly related to the size of the actual cut-off opening K2, which is conducive to improving the flow regulation accuracy.

[0070] If the shut-off member 30 is not inserted into the opening 11 to separate the portion of the opening 11 shielded by the shut-off member 30 from the portion not shielded by the shut-off member 30, a portion of the fluid entering the opening 11 will flow through the portion of the opening 11 shielded by the shut-off member 30 and then enter the valve seat 10, so a shut-off port is not accurately formed.

[0071] Figure 7The flow test results are shown in the figure, where the difference between the regulating valves used in the upper figure and the lower figure is that the shutoff member 30 of the regulating valve corresponding to the upper figure is not inserted into the opening 11, while the shutoff member 30 of the regulating valve corresponding to the lower figure is inserted into the opening 11 to separate the part of the opening 11 that is shielded by the shutoff member 30 and the part that is not shielded by the shutoff member 30. During the experiment, the pressure difference before and after the flow regulating assembly remains unchanged. In the figure, the horizontal axis is the stroke of the valve plug 20 (where the valve plug is fully opened as 100%), and the vertical axis is the flow rate (where the flow rate corresponding to the valve plug being fully opened is 100%). The four types of lines represent the four openings of the shutoff member 30, the dotted line is the opening 1, the dotted line is the opening 2, the double dotted line is the opening 3, and the solid line is the opening 4. The larger the opening, the smaller the range of the opening 11 shielded by the shutoff member. According to the experimental results, it can be seen that by inserting the shut-off piece 30 into the opening 11 to separate the part of the opening 11 covered by the shut-off piece 30 and the part not covered by the shut-off piece 30, the linear correlation between the stroke of the valve plug 20 and the flow rate can be effectively improved, which is beneficial to improving the flow regulation accuracy of the regulating valve.

[0072] In the flow regulating assembly of the regulating valve of the illustrative embodiment, the edge of the shutoff member shielding the opening is inserted into the opening and separates the portion of the opening shielded by the shutoff member from the portion not shielded by the shutoff member, which helps to improve the flow regulating accuracy of the regulating valve.

[0073] like Figure 3 and Figure 4 As shown, in the exemplary embodiment, the shut-off member 30 further includes a rotating ring 31 and a shut-off body 32. For ease of understanding, Figure 3The dotted line in the figure separates the rotating ring 31 and the shutoff body 32. The rotating ring 31 is rotatably arranged on the valve seat 10 around the axis L of the valve seat 10. The shutoff body 32 is arranged in the valve seat 10 and is fixedly connected to the rotating ring 31. The rotating ring 31 and the shutoff body 32 are, for example, two partial parts of an integrally formed component. The shutoff body 32 is in the shape of an arc-shaped sheet unfolded along the circumferential direction C of the valve seat 10 and has a shutoff surface 321 extending along the circumferential direction C of the valve seat 10. In the exemplary embodiment, the shutoff surface 321 can be the entire circumferential outer surface of the shutoff body 32, or it can be a part of the circumferential outer surface of the shutoff body 32, for example, the shutoff surface 321 is the circumferential outer surface of the outwardly protruding part of the shutoff body 32. The shutoff surface 321 fits with the inner surface of the valve seat 10 to shield the opening 11 from the inner side of the valve seat 10. One end of the partition 34 along the circumferential direction C of the valve seat 10 is inserted into the edge of the shutoff body 32 that shields the opening 11 along the axial direction A of the valve seat 10, thereby facilitating assembly, but is not limited to this. In other exemplary embodiments, the partition 34 and the shutoff body 32 may also be assembled through other structures, and the partition 34 and the shutoff body 32 may also be two partial parts of an integrally formed component. The other end of the partition 34 along the circumferential direction C of the valve seat 10 is inserted into the opening 11 to separate the portion of the opening 11 shielded by the shutoff member 30 and the portion not shielded by the shutoff member 30, and the end face 341 of the end is, for example, a plane perpendicular to the circumferential direction C of the valve seat 10, so as to reduce fluid resistance, but is not limited to this. The shutoff member has a simple structure and good stability.

[0074] like Figure 2 and Figure 3 As shown, in the exemplary embodiment, the flow regulating assembly further includes a support ring 50. The support ring 50 is fixedly arranged relative to the valve body 90 of the regulating valve and is located on one side of the valve seat 10 close to the open end of the valve seat 10 along the axial direction A of the valve seat 10. Figure 3 As shown, the rotating ring 31 has an annular flange 313. The support ring 50 and the valve seat 10 can abut against the flange 313 in a direction parallel to the axis L of the valve seat 10 to prevent the rotating ring 31 from moving relative to the valve seat 10 along the axial direction A of the valve seat 10. The structure is simple and easy to assemble.

[0075] like Figure 4 As shown, in the exemplary embodiment, the thickness of the circumferential end 323 of the shutoff body 32 not connected to the partition 34 along the radial direction of the valve seat 10 gradually decreases along the circumferential direction C of the valve seat 10 as it approaches the edge of the circumferential end 323. This helps to reduce fluid resistance, reduce valve body vibration and extend service life.

[0076] like Figures 1 to 3As shown, in the exemplary embodiment, the flow control assembly further includes a valve stem 60. The valve stem 60 is rotatably inserted in the valve seat 10 around the axis L of the valve seat 10 and can move relative to the valve seat 10 along the axial direction A of the valve seat 10. The valve stem 60 is rotatably inserted in the valve plug 20 around the axis L of the valve seat 10 and is configured to fix the relative position of the valve plug 20 along the axial direction A of the valve seat 10, which can be achieved, for example, by a clamping ring and a nut installed on the valve stem 60. Figure 1 As shown, the regulating valve further includes a valve cover 94 mounted on the valve body 90. When the flow regulating assembly is mounted on the valve body 90, the valve stem 60 is rotatably disposed on the valve cover 94 around the axis L of the valve seat 10 and can move relative to the valve cover 94 along the axial direction A of the valve seat 10. One end of the valve stem 60 passes through the valve body 90 for operation.

[0077] like Figure 3 As shown, in the exemplary embodiment, the flow regulating assembly further includes a driving member 70. Figure 8 As shown in the figure, the driving member 70 is fixedly connected to the end of the valve stem 60 inserted into the valve seat 10. The shut-off member 30 has a slide groove 322 extending along the axial direction A of the valve seat 10. The driving member 70 is slidably inserted in the slide groove 322 along the axial direction A of the valve seat 10. The rotating valve stem 60 can drive the shut-off member 30 to rotate relative to the valve seat 10 through the driving member 70. In this way, the shut-off member 30 can be driven to rotate relative to the valve seat 10 when the position of the valve stem 60 along the axial direction A of the valve seat 10 changes.

[0078] Fig. 9 2 is a cross-sectional view of the valve seat 10 and the valve plug 20. Fig. 9 As shown, in the exemplary embodiment, the open end of the valve seat 10 (ie Fig. 9 The outer surface of the valve plug 20 (i.e., the lower end) has a first annular abutment surface 12 perpendicular to the axial direction A of the valve seat 10. Fig. 9 The lower end of the valve seat 10 has an annular second abutment surface 22 which is perpendicular to the axial direction A of the valve seat 10 and opposite to the first abutment surface 12. Fig.10 For Fig. 9 Based on the changing state diagram, Fig.11 for Fig.10 The enlarged view of the V part is as follows: Fig.10 and Fig.11 As shown, the valve plug 20 can move until the second abutting surface 22 abuts against the first abutting surface 12 to completely cover the opening 11. This structure is simple and helps prevent fluid leakage when the valve plug is fully closed.

[0079] like Figures 9 to 11As shown, in the exemplary embodiment, the valve seat 10 has an annular groove 13 on the radial inner side of the first abutment surface 12. The flow regulating assembly also includes an elastic sealing ring 80 embedded in the groove 13. The valve plug 20 is provided with an annular convex ridge ring 24 protruding on the radial inner side of the second abutment surface 22. When the valve plug 20 moves to the second abutment surface 22 abutting the first abutment surface 12, the convex ridge ring 24 presses against the elastic sealing ring 80 to form an annular seal. This helps to further prevent fluid leakage when the valve plug is fully closed.

[0080] like Fig.11 As shown, in the exemplary embodiment, the circumferential cross section of the ridge ring 24 is a triangle with the tip facing the elastic sealing ring 80. One side of the triangle is located on the inner circumferential surface 26 of the valve plug 20 for shielding the opening 11. In this way, when the valve plug 20 is in the open state, the actual interception port K2 is formed by the lower edge of the ridge ring 24, avoiding unnecessary fluid resistance caused by the ridge ring 24. The angle of the other side of the triangle relative to the axial direction A of the valve seat 10 is, for example, 45 degrees, for easy processing. The tip of the triangle is provided with a circular chamfer to prevent the elastic sealing ring from being punctured.

[0081] The present invention also provides a regulating valve, such as Figure 1 As shown, in one exemplary embodiment, the regulating valve includes a valve body 90 and a Figure 2 The flow regulating assembly shown. The valve body 90 has a valve cavity 91. The valve cavity 91 has an inlet channel 911 and an outlet channel 912. The flow regulating assembly is arranged between the inlet channel 911 and the outlet channel 912 to regulate the flow of the fluid entering the outlet channel 912 from the inlet channel 911. The fluid entering the valve cavity 91 from the inlet channel 911 enters the valve seat 10 through the actual interception port K2, and leaves the valve seat 10 from the open port at the open end of the valve seat 10, and finally flows out of the valve cavity 91 from the outlet channel 912.

[0082] In the regulating valve of the exemplary embodiment, the edge of the shutoff member of the flow regulating assembly that shields the opening is inserted into the opening and separates the portion of the opening shielded by the shutoff member from the portion not shielded by the shutoff member, which helps to improve the flow regulation accuracy of the regulating valve.

[0083] like Figure 1 As shown, in the exemplary embodiment, the regulating valve is a dynamic balanced electric regulating valve. The dynamic balanced electric regulating valve also includes a pressure differential balancing component 93, which is arranged between the flow regulating component and the outlet channel 912. The pressure differential balancing component 93 can be adjusted according to the fluid pressure to ensure that the flow rate does not change with the change of pressure.

[0084] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0085] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the present invention, such as combination, division or repetition of features, should be included in the scope of protection of the present invention.

Claims

1. A flow regulating assembly of a regulating valve, characterized in that: include: A valve seat (10) is fixedly arranged relative to the valve body (90) of the regulating valve, the valve seat (10) is cylindrical with one end open and the other end closed, and has an opening (11) on its side wall extending along its circumference; a valve plug (20) in the shape of a cylinder with one end open and the other end closed, and coaxially sleeved on the valve seat (10) so as to be able to shield the opening (11) from the outside of the valve seat (10); the valve plug (20) is able to move relative to the valve seat (10) along the axial direction (A) of the valve seat (10) so as to adjust the shielding range of the opening (11); and A shut-off member (30) is provided, which is capable of covering the opening (11) from the inner side of the valve seat (10); the shut-off member (30) is capable of rotating relative to the valve seat (10) around the axis (L) of the valve seat (10) to adjust the covering range of the opening (11); the edge of the shut-off member (30) covering the opening (11) is inserted into the opening (11) to separate the portion of the opening (11) covered by the shut-off member (30) from the portion not covered by the shut-off member (30).

2. The flow regulating assembly of the regulating valve according to claim 1, characterized in that: The shut-off member (30) comprises: a rotating ring (31) rotatably arranged on the valve seat (10) around an axis (L) of the valve seat (10); a shutoff body (32) disposed in the valve seat (10) and fixedly connected to the rotating ring (31); the shutoff body (32) is in the shape of an arc-shaped sheet extending along the circumferential direction (C) of the valve seat (10) and has a shutoff surface (321) extending along the circumferential direction (C) of the valve seat (10); the shutoff surface (321) is in contact with the inner surface of the valve seat (10) so as to shield the opening (11) from the inner side of the valve seat (10); and A partition (34), one end of which along the circumferential direction (C) of the valve seat (10) is inserted into the edge of the shut-off body (32) that covers the opening (11) along the axial direction (A) of the valve seat (10), and the other end of the partition (34) along the circumferential direction (C) of the valve seat (10) is inserted into the opening (11) to separate the portion of the opening (11) that is covered by the shut-off member (30) from the portion that is not covered by the shut-off member (30).

3. The flow regulating assembly of the regulating valve according to claim 2, characterized in that: The flow regulating assembly also includes a support ring (50), which is fixedly arranged relative to the valve body (90) of the regulating valve and is located on a side of the valve seat (10) along the axial direction (A) of the valve seat (10) and close to the open end of the valve seat (10), and the rotating ring (31) has an annular flange (313). The support ring (50) and the valve seat (10) can relatively abut against the flange (313) in a direction parallel to the axis (L) of the valve seat (10) to prevent the rotating ring (31) from moving relative to the valve seat (10) along the axial direction (A) of the valve seat (10).

4. The flow regulating assembly of the regulating valve according to claim 2, characterized in that: The thickness of the circumferential end (323) of the shutoff body (32) not connected to the partition (34) along the radial direction of the valve seat (10) gradually decreases along the circumferential direction (C) of the valve seat (10) as it approaches the edge of the circumferential end (323).

5. The flow regulating assembly of the regulating valve according to claim 1, characterized in that: The flow regulating assembly further comprises: a valve stem (60) which is rotatably inserted into the valve seat (10) around an axis (L) of the valve seat (10) and is capable of moving relative to the valve seat (10) along an axial direction (A) of the valve seat (10); and A driving member (70) is fixedly connected to one end of the valve stem (60) inserted into the valve seat (10); the shut-off member (30) has a slide groove (322) extending along the axial direction (A) of the valve seat (10); the driving member (70) is slidably inserted in the slide groove (322) along the axial direction (A) of the valve seat (10); the rotating valve stem (60) can drive the shut-off member (30) to rotate relative to the valve seat (10) through the driving member (70).

6. The flow regulating assembly of the regulating valve according to claim 1, characterized in that: The outer surface of the open end of the valve seat (10) has a first annular abutment surface (12) perpendicular to the axial direction (A) of the valve seat (10), and the open end of the valve plug (20) has a second annular abutment surface (22) perpendicular to the axial direction (A) of the valve seat (10) and opposite to the first abutment surface (12), and the valve plug (20) can move until the second abutment surface (22) fits the first abutment surface (12) to completely cover the opening (11).

7. The flow regulating assembly of the regulating valve according to claim 6, characterized in that: The valve seat (10) has an annular groove (13) on the radial inner side of the first abutment surface (12), the flow regulating assembly also includes an elastic sealing ring (80) embedded in the groove (13), and the valve plug (20) is provided with an annular convex ridge ring (24) protruding on the radial inner side of the second abutment surface (22), and when the valve plug (20) moves until the second abutment surface (22) is in contact with the first abutment surface (12), the convex ridge ring (24) presses against the elastic sealing ring (80) to form an annular seal.

8. The flow regulating assembly of the regulating valve according to claim 7, characterized in that: The circumferential cross-section of the convex ridge ring (24) is in the shape of a triangle with the tip pointing toward the elastic sealing ring (80), one side of the triangle is located on the inner circumferential surface (26) of the valve plug (20) for shielding the opening (11), the inner circumferential surface (26) of the valve plug (20) for shielding the opening (11) is an inner cylindrical surface, and the tip of the triangle is provided with an arc chamfer.

9. A regulating valve, characterized in that: include: A valve body (90) having a valve chamber (91), wherein the valve chamber (91) has an inlet passage (911) and an outlet passage (912); as well as A flow regulating component as described in any one of claims 1 to 8, which is arranged between the inlet channel (911) and the outlet channel (912) to regulate the flow of fluid from the inlet channel (911) into the outlet channel (912).

10. The regulating valve according to claim 9, characterized in that: The regulating valve is a dynamically balanced electric regulating valve.

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