Electric butterfly valve

Abstract

The invention discloses an electric butterfly valve which comprises a valve element component (30) and a window component (50), at least part of the valve element component (30) is located in an inner cavity of the electric butterfly valve, the valve element component comprises a valve element part and a scale display mechanism (320), and the value of the scale display mechanism (320) corresponds to the opening degree of the valve element part (31); the electric butterfly valve comprises an installation hole (1208B), at least part of the window component (50) is located in the installation hole (1208B), the window component (50) comprises a visual channel (510), the position of the scale display mechanism (320) is matched with the visual channel (510), the scale display mechanism (320) can be observed from the visual channel (510), and the visual channel (510) is communicated with the installation hole (1208B). And the scale display mechanism (320) can be observed from the visual channel (510).

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically to an electric butterfly valve. Background Technology

[0002] An electric butterfly valve generally includes a drive head, a valve body, and a valve core assembly. The valve core assembly is installed in the valve body, and the drive head is connected to an external electrical control device, which can control the rotation of the valve core assembly in the valve body to open / close the valve port or regulate the flow rate at the outlet of the electric control valve. Summary of the Invention

[0003] The purpose of this invention is to provide an electric butterfly valve that can observe a scale display mechanism, the value of which corresponds to the opening degree of the valve core.

[0004] The electric butterfly valve provided by the present invention includes a valve core component and a viewing window component. The valve core component is at least partially located in the inner cavity of the electric butterfly valve. The valve core component includes a valve core portion and a scale display mechanism. The value of the scale display mechanism corresponds to the opening degree of the valve core portion. The electric butterfly valve includes a mounting hole. The viewing window component is at least partially located in the mounting hole. The viewing window component includes a viewing channel. The position of the scale display mechanism is adapted to the viewing channel, and the scale display mechanism can be observed from the viewing channel.

[0005] The opening degree of the valve core can be determined by observing the scale display mechanism through the viewing window component on the valve body component.

[0006] In a further embodiment, the electric butterfly valve includes an upper valve section and a lower valve section. A small portion of the valve core component is located within the inner cavity of the lower valve section. The valve core component includes a valve stem section. The upper valve section includes a seat body. The seat body includes the mounting hole and an axial hole. The valve stem section includes a scale display mechanism located within the axial hole.

[0007] In a further embodiment, the upper valve portion also includes a housing component, a motor component, and a gear component. The housing component is fixedly connected to the base body, the motor component is located inside the housing component, and the gear component is located between the motor component and the base body. The gear component includes a connecting frame, and the connecting frame is kinetically connected to the valve stem portion.

[0008] In a further embodiment, the connecting frame can drive the valve stem portion to rotate, and the valve stem portion can drive the valve core portion to rotate; the connecting frame includes the scale display mechanism.

[0009] In a further embodiment, the mounting hole is perpendicular to the axial hole of the base; the inner wall of the mounting hole is threaded to the window component or the window component is welded to the base; and the end of the window component facing the valve stem is at a distance from the scale display mechanism.

[0010] In a further embodiment, the housing component is welded and fixed to the seat body, the lower valve portion includes a valve body, the valve body includes a fixing portion and a valve body base, the valve body base includes a first base and a valve core mounting portion, the first base is located between the fixing portion and the valve core mounting portion, the valve core portion is located inside the valve core mounting portion, the valve stem portion passes through the first base, and the fixing portion is detachably fixedly connected to the seat body.

[0011] In a further embodiment, the gear component further includes a gear ring and a gear set, the gear set being located within the gear ring. The gear set includes a first-stage gear set, a first-stage planetary carrier, a second-stage gear set, a second-stage planetary carrier, a third-stage gear set, a third-stage planetary carrier, and a fourth-stage gear set. The first-stage planetary carrier is connected to a first-stage short shaft, the number of gears in the first-stage gear set corresponding to the number of first-stage short shafts, and each gear in the first-stage gear set passes through each short shaft of the first-stage short shaft. The second-stage planetary carrier is connected to a second-stage short shaft, the number of teeth in the second-stage gear set corresponding to the number of second-stage short shafts, and each gear in the second-stage gear set passes through each short shaft of the second-stage short shaft. The third-stage planetary carrier is connected to a third-stage short shaft, the number of gears in the third-stage gear set corresponding to the number of third-stage short shafts, and each gear in the third-stage gear set passes through each short shaft of the third-stage short shaft. A wear-resistant component is provided between the outer wall of at least one short shaft and the inner wall of its corresponding gear. The wear-resistant component is a non-metallic wear-resistant component or a rolling friction component.

[0012] In a further embodiment, the wear-resistant component is made of PEEK or PTFE. The wear-resistant component is sleeved on the outer periphery of the corresponding short shaft. The wear-resistant component includes a cylindrical portion and a limiting portion. The cylindrical portion is located between the outer wall of the short shaft and the inner wall of the gear corresponding to the short shaft. The limiting portion is located below the corresponding planetary carrier connected to the short shaft to prevent the wear-resistant component from dislodging from above the corresponding planetary carrier.

[0013] In a further embodiment, the gear component also includes a gear ring and a gear set. The gear set is located within the gear ring and includes a first-stage gear set, a first-stage planetary carrier, a second-stage gear set, a second-stage planetary carrier, a third-stage gear set, a third-stage planetary carrier, and a fourth-stage gear set. The fourth-stage gear set is located between the third-stage planetary carrier and the connecting frame, and is adapted to the connecting frame. The first-stage planetary carrier is connected to a first-stage short shaft. The number of gears in the first-stage gear set corresponds to the number of short shafts in the first-stage short shaft, and each gear in the first-stage gear set passes through the first-stage short shaft. The upper valve portion includes at least one short shaft; the second-stage planetary carrier is connected to the second-stage short shaft, the number of gears in the second-stage gear set corresponds to the number of short shafts in the second-stage short shaft, and each gear in the second-stage gear set passes through each short shaft of the second-stage short shaft; the third-stage planetary carrier is connected to the third-stage short shaft, the number of gears in the third-stage gear set corresponds to the number of short shafts in the third-stage short shaft, and each gear in the third-stage gear set passes through each short shaft of the third-stage short shaft; the upper valve portion also includes at least one fixing member, the fixing member is fixedly connected to the lower end of the short shaft, and the fixing member is welded and fixed to the planetary carrier corresponding to the short shaft.

[0014] In a further embodiment, the valve core component further includes a lower positioning member, the valve body further includes a second base, the valve core mounting portion is located between the second base and the first base, the lower positioning member is partially located in the second base, the valve core portion includes a receiving hole, the upper end of the lower positioning member is located in the receiving hole, the valve core anti-wear member is located in the receiving hole, and the valve core anti-wear member is sleeved on the upper end of the lower positioning member.

[0015] In a further embodiment, the outer wall of the valve stem portion includes an annular recess, and a valve stem wear-resistant component is sleeved in the annular recess. The valve stem wear-resistant component is located between the valve stem portion and the first base portion of the valve body.

[0016] In a further embodiment, the upper valve portion further includes a liner plate located above the first-stage gear set and the first-stage short shaft. The gear ring includes an upper limit portion, and the liner plate is located between the upper limit portion and the first-stage short shaft. The liner plate includes plate holes corresponding to the number of corresponding-stage short shafts, and the upper end of the corresponding-stage short shaft is located in the plate holes.

[0017] In a further embodiment, the bushing is included between the first-stage gear set and the first-stage planetary carrier, between the second-stage gear set and the second-stage planetary carrier, and between the third-stage gear set and the third-stage planetary carrier.

[0018] In a further embodiment, the gear component includes a gear ring, the gear ring including a circumferential limiting portion, the circumferential limiting portion including a first lower protrusion and a second lower protrusion, the first lower protrusion and the second lower protrusion including a first notch and a second notch, the connecting frame including a first circumferential protrusion and a second circumferential protrusion; the first circumferential protrusion is at least partially located in the first notch, the second circumferential protrusion is at least partially located in the second notch; the first circumferential protrusion is rotatable within the first notch, the second circumferential protrusion is rotatable within the second notch so that the first lower protrusion and the second lower protrusion limit the rotational stroke of the connecting frame; the seat includes a first upper protrusion and a second upper protrusion, at least one of the first lower protrusion and the second lower protrusion abuts against the first upper protrusion, and at least the other abuts against the second upper protrusion, so that the seat limits the rotation of the gear ring.

[0019] In a further embodiment, the gear component includes a gear ring, the gear ring including a circumferential limiting portion, the circumferential limiting portion including a first lower protrusion and a second lower protrusion, the first lower protrusion and the second lower protrusion including a first notch and a second notch, the connecting frame including a first circumferential protrusion and a second circumferential protrusion; the first circumferential protrusion is at least partially located in the first notch, the second circumferential protrusion is at least partially located in the second notch; the first circumferential protrusion is rotatable within the first notch, the second circumferential protrusion is rotatable within the second notch so that the first lower protrusion and the second lower protrusion limit the rotational stroke of the connecting frame; the seat includes a first upper protrusion and a second upper protrusion, at least one of the first lower protrusion and the second lower protrusion abuts against the first upper protrusion, and at least the other abuts against the second upper protrusion, so that the seat limits the rotation of the gear ring; it also includes a positioning member, the seat including a first positioning hole, the valve body including a second positioning hole, the positioning member being partially located in the first positioning hole and partially located in the second positioning hole.

[0020] In a further embodiment, the gear component further includes a positioning shaft. The first-stage planetary carrier includes a first shaft hole, the second-stage planetary carrier includes a second shaft hole, and the third-stage planetary carrier includes a third shaft hole. The connecting frame includes an upper groove. The positioning shaft passes through the second shaft hole and the third shaft hole. The positioning shaft includes a main positioning section, an upper positioning section, and a lower positioning section. The main positioning section passes through the second-stage planetary carrier and the third-stage planetary carrier. The upper positioning section is located in the first shaft hole and has an interference fit or a small clearance fit with the hole wall of the first shaft hole. The lower positioning section is located in the upper groove and has an interference fit or a small clearance fit with the upper groove.

[0021] In a further embodiment, at least one of the first-stage planetary carrier, the second-stage planetary carrier, and the third-stage planetary carrier includes an upper boss at its upper end, the upper boss facing one side of the corresponding stage gear set it supports, and the lower end of the gear partially abuts against the upper end of its corresponding upper boss. Attached Figure Description

[0022] Figure 1 The image shown is a front view schematic diagram of an embodiment of the electric butterfly valve of this application;

[0023] Figure 2 The diagram shown is an exploded structural schematic of an embodiment of the electric butterfly valve of this application;

[0024] Figure 3 As shown Figure 1 A schematic diagram of the front view cross-sectional structure of the electric butterfly valve shown.

[0025] Figure 4 As shown Figure 1 A cross-sectional view of the electric butterfly valve shown from another direction.

[0026] Figure 4A As shown Figure 4 A magnified schematic diagram of the partial structure at point A in the middle;

[0027] Figure 4B As shown Figure 4A A magnified schematic diagram of the structure at point IA in the middle;

[0028] Figure 4C As shown Figure 1 A three-dimensional structural schematic diagram of a specific example of the valve stem section;

[0029] Figure 4C-1 As shown Figure 4C A magnified view of a portion of point Q;

[0030] Figure 4D As shown Figure 4A A schematic diagram of the side view structure at point IA;

[0031] Figure 5A As shown Figure 1 A three-dimensional structural diagram of the central support body;

[0032] Figure 5B As shown Figure 5A A schematic diagram of the cross-sectional structure of the central seat body along the AA direction;

[0033] Figure 5C As shown Figure 5A A schematic diagram of the cross-sectional structure of the central seat body along the BB direction;

[0034] Figure 5D As shown Figure 5AA schematic diagram of the central support structure from below;

[0035] Figure 6A The figure shown is a three-dimensional structural diagram of the connecting frame in Figure 5;

[0036] Figure 6B The diagram shown in Figure 5 is a top view of the connecting frame structure.

[0037] Figure 6C As shown Figure 6A A cross-sectional view of the connecting frame in the CC direction;

[0038] Figure 7 As shown Figure 2 A magnified schematic diagram of the local structure at point B;

[0039] Figure 7A As shown Figure 7 A magnified schematic diagram of the local structure at point I;

[0040] Figure 7B As shown Figure 7 A magnified schematic diagram of the local structure at point II;

[0041] Figure 7C As shown Figure 7 A schematic diagram of the local structure at point III;

[0042] Figure 7D As shown Figure 7 A magnified schematic diagram of the local structure at point IV;

[0043] Figure 7E A schematic diagram of a first embodiment showing the fixing member to the corresponding planetary carrier and short shaft is shown;

[0044] Figure 7F A schematic diagram of a second embodiment is shown, illustrating the fixing of the fastener to the corresponding planetary carrier and short shaft.

[0045] Figure 8 The diagram shows the structure of the scale display mechanism when it is mounted on the connecting frame.

[0046] Figure 9 As shown Figure 4 At point N, the positioning shaft is not shown; a structural diagram of the shaft holes on each planetary carrier is displayed.

[0047] Figure 10 Another embodiment of the electric butterfly valve is shown. Figure 4B A structural diagram of the location shown;

[0048] Figure 11 As shown Figure 10 A schematic diagram of an embodiment in which an indicator mark is provided on the middle glass 56. Detailed Implementation

[0049] The present invention will now be described in further detail with reference to the accompanying drawings.

[0050] The electric butterfly valve provided by this invention includes a valve core component and a viewing window component. The valve core component is at least partially located within the inner cavity of the electric butterfly valve. The valve core component includes a valve core portion and a scale display mechanism. The value of the scale display mechanism corresponds to the opening degree of the valve core portion. The electric butterfly valve includes a mounting hole, and the viewing window component is at least partially located within the mounting hole. The viewing window component includes a viewing channel, and the position of the scale display mechanism is adapted to the viewing channel, allowing the scale display mechanism to be observed through the viewing channel.

[0051] As shown in the figure, the electric butterfly valve of this embodiment includes an upper valve part 10, a lower valve part 20 and a valve core component 30. The valve core component 30 is installed in the inner cavity of the lower valve part 20. The upper valve part 10 and the lower valve part 20 are detachably fixedly connected. On the one hand, it is easy to assemble, and on the other hand, it is convenient to replace or repair the valve core component.

[0052] like Figure 1-4 As shown, the upper valve part 10 includes a housing component 11 and a seat 12, which are fixedly connected. This fixed connection can be a threaded connection or a welded connection. The housing component 11 includes an upper housing 11A and a lower housing 11B, which are welded together, for example, by laser welding. In this embodiment, the upper housing 11A and lower housing 11B are stainless steel drawn parts, or they can be stainless steel pipes formed by necking or other methods. The separate upper housing 11A and lower housing 11B configuration of the housing component 11 makes processing easier and improves the yield rate of the housing component, while also reducing processing difficulty during the drawing process.

[0053] The upper housing 11A houses the motor component 14, and the lower housing 11B houses the gear component 15. The upper housing 11A and the lower housing 11B are separate, which allows the upper housing 11A and the lower housing 11B to be designed according to the required dimensions of the motor and gear components, thereby avoiding unnecessary material waste.

[0054] In this embodiment, the base 12 can be a machined part or a casting part, specifically made of steel. The lower housing 11B is located between the upper housing 11A and the base 12, and the base 12 and the lower housing 11B can be welded together. Compared with threaded or screw connections, welding can provide a better seal between the housing component 11 and the base 12, and the product has a more aesthetically pleasing appearance.

[0055] like Figure 4A As shown, the upper valve section 10, in addition to the housing component 11 and the seat 12, also includes an electrical connection component 13, a motor component 14, and a gear component 15. The electrical connection component 13 includes electrical pins for electrical connection to external electrical control components. The electrical connection component 13 is welded or threaded to the upper housing 11A. The electrical connection component 13 is electrically connected to the motor component 14 via leads. The motor component 14 includes an output shaft component, which includes an output gear section 140 for meshing with the input gear section of a gear set.

[0056] In this embodiment, the output shaft component specifically includes a motor shaft 141 and an output gear 142. The motor shaft 141 and the output gear 142 can be connected by interference fit, welding, riveting, or other methods, as long as the motor shaft 141 can drive the output gear 142 to rotate together. The output gear 142 includes the aforementioned output gear section 140.

[0057] like Figure 2 and Figure 3 As shown, the seat 12 and the lower valve part 20 are detachably connected by screws or bolts 01. The advantage of this detachable connection is that it facilitates maintenance or replacement of the valve core component 30 when needed. The seat 12 is fixed in circumferential position relative to the lower valve part 20, meaning that there is no relative rotation between them.

[0058] The seat 12 includes a circumferential stop, and the gear component 15 includes a gear ring 150. The gear ring 150 includes a circumferential limiting part. The circumferential stop can cooperate with the circumferential limiting part to restrict the rotation of the gear ring 150 relative to the lower valve part of the seat 12. It should be noted that restricting rotation here does not mean that the two are absolutely stationary. Under the premise of achieving the corresponding function, it is not excluded that the gear ring 150 may have a slight rotation relative to the lower seat 12.

[0059] For example, such as Figures 5A-5C As shown in this embodiment, in the longitudinal direction of the electric butterfly valve, the seat 12 can support the gear ring 150. The seat 12 includes a seat base 1207, and an upper protrusion 121, which protrudes from the seat base 1207 toward the gear component 15 and is disposed opposite to it, serves as a circumferential stop. The surface of the seat 12 that contacts the lower end of the gear ring 150 is defined as the support surface. The upper protrusion 121 refers to the part that protrudes from the support surface toward the gear component 15. This support surface is the upper end surface 12071 of the seat base 1207, that is, in... Figure 4As shown, the upper protrusion 121 protrudes upward relative to the plane containing the support surface 12071. The upper protrusion 121 includes a first upper protrusion 121A and a second upper protrusion 121B. The first upper protrusion 121A and the second upper protrusion 121B are axially symmetrical and centrally symmetrically distributed on the seat 12. In other words, the first upper protrusion 121A and the second upper protrusion 121B have the same structure and are arranged axially symmetrically. It is understandable that... Figure 5A The structure and shape of the upper protrusion 121 shown are only a specific example of the upper protrusion 121. Any structural deformations that do not depart from the design concept should be considered within the scope of the upper protrusion 121. The gear ring 150 is cylindrical. One end of the gear ring 150 facing the seat 12 includes a set of lower protrusions 151 corresponding to the upper protrusion 121. On the gear ring 150, the lower protrusions 151 include a first lower protrusion 151A and a second lower protrusion 151B. The first lower protrusion 151A and the second lower protrusion 151B are axially symmetrical and centrally symmetrically distributed on the gear ring 150. The first lower protrusion 151A and the second lower protrusion 151B are at least partially located between the first upper protrusion 121A and the second upper protrusion 121B, respectively. That is, the first lower protrusion 151A is at least partially located between one end of the first upper protrusion 121A and one end of the second upper protrusion 121B, and the second lower protrusion 151B is located between the other end of the first upper protrusion 121A and the other end of the second upper protrusion 121B. In the radial direction of the seat body 12, the first lower protrusion 151A and the second lower protrusion 151B are limited by the first upper protrusion 121A and the second upper protrusion 121B, restricting the rotation of the gear ring 150 relative to the lower housing 11B. Through the size and shape design, the seat body 12 circumferentially limits the gear ring 150. It should be noted that the first lower protrusion 151A and the second lower protrusion 151B can be interference-fitted with the sidewalls of the first upper protrusion 121A and the second upper protrusion 121B, respectively. However, for ease of assembly, in this embodiment, the first lower protrusion 151A and the second lower protrusion 151B are clearance-fitted with the first upper protrusion 121A and the second upper protrusion 121B in the circumferential direction of the seat 12.

[0060] The gear ring 150 can be machined by powder metallurgy, and the circumferential limiting part can be directly machined during the machining process. The seat 12 can be a machined part, and the circumferential stop part can be directly machined during the machining process. The aforementioned circumferential limiting structure of the seat 12 and gear ring 150 is easy to machine and the circumferential limiting is reliable.

[0061] It should be noted that the gear ring 150 can be welded and fixed to the housing component 11 of the upper valve part 10 so that the gear ring 150 does not rotate, while the seat 12 is fixedly connected to the housing component 11. Therefore, in this way, the gear ring 150 and the seat 12 can also be prevented from rotating.

[0062] like Figure 4AAs shown, the motor component 14 overlaps the upper end of the lower housing 11B, and is axially supported by the lower housing 11B. Specifically, as... Figure 4A As shown, the motor component 14 includes a connecting plate 143 and a motor body 144, with the motor body 144 electrically connected to the power receiving component 13. The connecting plate 143 is fixedly connected to the motor body 144 and sits on the upper end of the lower housing 11B, which supports the connecting plate 143 and thus the motor body 144. The connecting plate 143 can be welded to the housing component 11.

[0063] The gear ring 150 is mounted between the motor component 14 and the base 12. As one specific embodiment, such as... Figure 4A As shown, the gear ring 150 is mounted between the lap plate 143 and the seat 12. The gear component 15 also includes a gear set 153 and a connecting frame 152, which is kinetically connected to the valve stem portion 32 described below. The connecting frame 152 includes a main body 1521, a circumferentially protruding portion 1522 relative to the main body 1521, and a valve stem drive portion 1523 protruding downward relative to the main body 1521. The main body 1521 is plate-shaped, and as shown, the gear set 153 abuts against the upper surface of the main body 1521. The valve stem drive portion 1523 protrudes downward relative to the lower surface of the main body 1521 towards the valve portion 20 and at least partially extends into the seat 12.

[0064] In this embodiment, the connecting frame 152 is processed by powder metallurgy, directly machining the main body 1521, the circumferential protrusion 1522, and the valve stem drive part 1523. The main body 1521 is disc-shaped, and the circumferential protrusion 1522 extends circumferentially from the outer edge of the main body 1521. For example... Figures 6A-6C As shown, the circumferential protrusion 1522 includes a first circumferential protrusion 1522A and a second circumferential protrusion 1522B, which are fan-shaped protrusions from the outer edge of the main body 1521. They are axially and centrally symmetrically distributed circumferentially around the main body 1521. The connecting frame 152 is circumferentially rotatable relative to the gear ring 150 and the seat 12 under the drive of the gear set 153.

[0065] Specifically, as a particular embodiment, in the lateral direction of the electric butterfly valve, i.e. Figure 3 In the YY direction shown, the first circumferential protrusion 1522A and the second circumferential protrusion 1522B of the aforementioned circumferential protrusion 1522 are respectively located between the two sides of the first lower protrusion 151A and the second lower protrusion 151B of the gear ring 150. The first lower protrusion 151A and the second lower protrusion 151B are arc-shaped, as shown... Figure 1As shown, two notches, namely a first notch 151C and a second notch 151D, are formed between the first lower protrusion 151A and the second lower protrusion 151B of the gear ring 150. The first notch 151C and the second notch 151D penetrate the inner and outer surfaces of the gear ring radially. The first circumferential protrusion 1522A of the connecting frame 152 is at least partially located within the first notch 151C, and the second circumferential protrusion 1522B is at least partially located within the second notch 151D. When the connecting frame 152 rotates circumferentially, the first circumferential protrusion 1522A and the second circumferential protrusion 1522B can abut against the first lower protrusion 151A and the second lower protrusion 151B of the gear ring 150, respectively, so that the gear ring 150 provides circumferential stopping and limiting of the connecting frame 152.

[0066] As described above, the lower protrusion 151 of the gear ring 150 can engage with the upper protrusion 121 of the seat 12, allowing the seat 12 to circumferentially limit the gear ring 150 and restrict its circumferential rotation. The lower protrusion 151 can also engage with the first circumferential protrusion 1522A and the second circumferential protrusion 1522B of the connecting frame 152 to limit the circumferential rotation stroke of the connecting frame 150, thereby limiting the rotation stroke of the valve core component described below. This further makes the valve's longitudinal structure more compact and fully utilizes the valve's internal space.

[0067] More specifically, the valve stem drive portion 1523 of the connecting bracket 152 includes a insertion recess 15230. After the valve stem drive portion 1523 extends from the lower end of the main body portion 1521 towards the lower valve portion 20, the insertion recess 15230 allows the valve stem upper connecting portion 324, as described below, to be inserted, so that the output gear portion 152 drives the valve stem portion 32 to rotate.

[0068] like Figure 3 , Figure 4 and Figures 5A-5D As shown, the seat 12 includes an axial hole 1200. The valve stem drive part 1523 extends at least partially into the axial hole 1200 and is clearance-fitted with the hole wall of the axial hole 1200. Thus, the seat 12 can also serve to radially limit and position the connecting frame 152. The hole wall of the axial hole 1200 can be adapted to the shape of the portion of the valve core component located within the axial hole 1200. When the connecting frame 152 rotates circumferentially relative to the seat 12 under the transmission action of the gear set 153, the connecting frame 152 can drive the valve core component 30 to rotate.

[0069] like Figure 3 , 5A - Figure 5CAs shown, the seat body 12 also includes a stepped upper hole 1201 with an inner diameter larger than the axial hole 1200 of the seat body. That is, the seat body 12 has an axially through structure, including an axially through hole, which includes the aforementioned axial hole 1200 and the stepped upper hole 1201. The diameter of the stepped upper hole 1201 is larger than the diameter of the shaft outlet hole 1200 of the seat body. A bearing 60 is provided in the stepped upper hole 1201. The outer diameter of the bearing 60 is smaller than the inner diameter of the stepped upper hole 1201, and the inner diameter of the bearing 60 is larger than the inner diameter of the axial hole 1200 of the seat body. The bearing 60 is sleeved on the outer periphery of the valve stem drive part 1523 of the connecting frame 152, so that the outer wall of the valve stem drive part 1523 contacts the inner wall of the bearing 60 but not the inner wall of the axial hole 1200 of the seat body, thereby reducing the rotational friction between the valve stem drive part 1523 and the hole wall of the stepped upper hole 1201 of the seat body. In this embodiment, the bearing component 60 can specifically be a ball bearing.

[0070] The lower valve portion 20 includes a valve body 21, which includes a fixing portion 211 and a valve body base 212, such as Figures 1 to 4 As shown, the electric butterfly valve also includes several fixing bolts 40, which can be screws or bolts 40 or other connecting parts. The seat 12 has several seat fixing holes 1210 arranged around its longitudinal central axis. The fixing part 211 of the valve body 21 has several downward-facing valve body fixing holes 2110. The aforementioned detachable fixed connection between the upper valve part 10 and the lower valve part 20 can be achieved through the cooperation of the fixing bolts 40 with the seat fixing holes 1210 and the valve body fixing holes 2110. To facilitate the assembly of the seat 12 and the valve body 21, as... Figure 3 and Figure 5D As shown, the electric butterfly valve also includes a positioning element 80. The seat 12 has a first positioning hole 81, and the valve body 21 has a second positioning hole 82. Part of the positioning element 80 is located in the first positioning hole 81, and part is located in the second positioning hole 82. During assembly, one end of the rod-shaped or other shaped positioning element 80 can be pressed into one of the first positioning hole 81 or the second positioning hole 82, and then the other end of the positioning element 80 can be inserted into the other of the first positioning hole 81 or the second positioning hole 82, thus achieving a pre-positioning of the valve seat 12 and the valve body 21. The positioning element 80 also serves to position the seat 12 relative to the scale display mechanism. For example... Figure 4 In order to prevent the base 12 from being in the middle during installation. Figure 4 The position shown is 180 degrees off circumferentially relative to the valve body 21, causing the scale display mechanism to be outside the range observable by the viewing window component 50, making it impossible to observe the scale display mechanism 320.

[0071] The seat body 12 also includes a lower stepped hole 1202, which is also part of the aforementioned axial through hole. The fixing part 211 extends at least partially into the lower stepped hole 1202. The portion of the fixing part 211 located within the lower stepped hole 1202 is defined as the mating part 2111. The mating part 2111 has a clearance fit with the inner wall of the lower stepped hole 1202. This clearance should not be too large, so that when the seat body 12 and valve body 21 are assembled, their pre-positioning is achieved through the fit between the mating part 2111 and the hole wall of the lower stepped hole 1202, facilitating assembly. It should be noted that the clearance fit between the fixing part 211 of the valve body 21 and the inner wall of the lower stepped hole 1202 is only an example; the fit is not limited to a clearance fit.

[0072] like Figure 3 and Figure 4 As shown, the valve body base 212 includes a first base 2121, a valve core mounting portion 2122, and a second base 2123. In the longitudinal direction of the electric butterfly valve, the first base 2121 is located between the fixing portion 211 and the valve core mounting portion 2122. In this embodiment, the valve core mounting portion 2122 is specifically annular and is located between the first base 2121 and the second base 2123. The valve core mounting portion 2122 includes a first fluid port A and a second fluid port B.

[0073] The valve core component 30 includes a valve core portion 31 and a valve stem portion 32. The valve core portion 31 and the valve stem portion 32 are either fixedly connected or limited in their connection. A fixed connection here means that the two can be connected by bolts or direct threaded engagement, while a limited connection means that they can be connected in a non-fixed manner with some flexibility, such as a snap-fit ​​engagement. The goal is to enable the valve stem 32 to drive the valve core 31 to rotate, thus achieving the desired function. Alternatively, provided that the assembly requirements of the valve core component 30 and the lower valve portion 20 are met, the valve core portion 31 and the valve stem portion 32 can also be an integral structure, i.e., integrally molded. The valve core portion 31 is disc-shaped and is located within the valve core mounting portion 2122.

[0074] like Figure 3As shown, the valve stem portion 32 is connected to the connecting frame 152 of the upper valve portion 10 via a transmission connection, enabling the motor 14 of the upper valve portion 10 to drive the valve stem portion 32 to rotate. Specifically, the valve stem portion 32 passes through the first base portion 2121 and the fixing portion 2110 of the valve body 21 and extends into the valve stem drive portion 1523 of the connecting frame 152. In this embodiment, the inner hole wall of the valve stem drive portion 1523 is non-circular, for example, rectangular or hexagonal. The cross-section of the portion of the valve stem portion 32 located in the inner hole of the valve stem drive portion 1523 is a non-circular cross-section that matches the inner hole wall of the valve stem drive portion 1523. This allows the upper valve portion motor 14 to drive the gear component 15 to rotate, thereby driving the valve stem portion 32 to rotate and adjusting the flow rate between the first fluid port A and the second fluid port B of the electric butterfly valve. Here, the flow rate refers to the case where it is greater than or equal to 0.

[0075] The electric butterfly valve of this application allows for convenient observation of the scale display mechanism on the valve stem through a viewing window. It can be applied to, but is not limited to, centrifuge units, such as magnetic levitation high-speed centrifuge units. When the electric butterfly valve is used in a system, a key technical challenge is determining whether the actual opening position of the valve core 31 matches the set opening position in the event of a system malfunction. This also facilitates rapid location of the fault. Therefore, to confirm the actual opening position of the valve core 31 of the electric butterfly valve, in a further embodiment, such as... Figures 1-4D As shown, the upper valve section 10 also includes a viewing window component 50. The seat 12 is fixedly connected to and detachable from the viewing window component 50, meaning they are detachably fixed. Of course, a non-detachable connection is also possible. Specifically, the viewing window component 50 can be installed on the side wall of the seat 12. When the upper valve section 10 and the lower valve section 20 are not disassembled, the opening degree of the electric butterfly valve can be observed through the viewing window component 50.

[0076] like Figure 4A and Figure 4B , Figures 5A-5D As shown, the base 12 includes a mounting hole 1208B, which communicates with the axial hole 1200 of the base. The mounting hole 1208B is perpendicular to the axial hole 1200. It should be noted that this perpendicularity may not be perfect due to machining tolerances. The outer wall of the viewing window component 50 is threaded to the inner wall of the mounting hole 1208B. Furthermore, it is not limited to a vertical orientation; the vertical orientation is simply for easier observation of the corresponding scale display section from the side through the viewing window component 50.

[0077] As shown in the figure, the portion of the valve stem 32 located within the axial hole 1200 of the seat includes a scale display mechanism 320. This portion of the valve stem 32 is defined as the scale display portion 321. In this specific embodiment, the scale display mechanism 320 is located below the connecting frame valve stem drive portion 1523. The scale display structure 320 can be directly printed on the valve stem 32 by laser printing or other methods, or it can be pasted on by other methods or formed directly by machining. The scale display structure can be scale characters, or a combination of scale characters and scale lines. The scale characters can be numbers, letters, or any combination of numbers, letters, and numbers. The scale display structure can also be other display structures that can play an equivalent role. For example, the scale display mechanism can be directly machined at the scale display portion 321, or it can be provided at this portion by other methods. The value of the scale display mechanism can correspond to the opening degree of the valve core. The value of the scale display mechanism refers to, for example... Figure 4C Specific parameters such as 2 and 4.

[0078] As one specific embodiment, such as Figure 5A As shown, the base 1207 includes a window component mounting portion 1208 and a ring platform portion 1206. The ring platform portion 1206 is located between the window mounting portion 1208 and the upper protrusion 121. The ring platform portion 1206 is annular. The window mounting portion 1208 is cylindrical with a mounting plane 1208A. The window mounting portion 1208 is a cylindrical body with an axial through hole on its outer surface, which has a mounting plane 1208A. That is, the outer surface of the window mounting portion 1208 includes an arc surface 1209A and a mounting plane 1208A. The outer diameter of the ring platform portion 1206 is smaller than the outer diameter of the arc surface 1209A. The aforementioned support surface 12071 is part of the upper end surface of the ring platform portion 1206. The outer diameter of the annular platform 1206 is less than or equal to the inner diameter of the lower housing 11B. The lower end of the lower housing 11B sits on the upper end face of the window mounting portion 1208 and is interference-fitted or has a small clearance fit with the outer wall of the annular platform portion 1206. The annular platform portion 1206 provides circumferential positioning for the lower housing 11B and also facilitates the coaxiality of other components of the electric butterfly valve. The lower end of the lower housing 11B abuts against the portion of the window mounting portion 1208 located on the outer side of the annular platform portion 1206. Afterward, the lower housing 11B is welded and fixed to the seat 12.

[0079] The window component 50 is threadedly connected and fixed to the window component mounting portion 1208. To facilitate the installation of the window component 50, the window component mounting portion 1208 has the aforementioned mounting surface 1208A. Furthermore, to achieve a seal between the window component 50 and the window component mounting portion 1208 and prevent leakage at the mating area, such as... Figure 2 As shown, several sealing rings 1209 are also installed between the window component 50 and the window component mounting portion 1208. The sealing rings 1209 can be O-rings, etc. It is understandable that... Figure 5A The mounting plane 1208A shown is closer to the central axis of the electric butterfly valve than the arcuate surface 1209A, but the mounting plane 1208A can also be farther from the central axis than the arcuate surface 1209A, that is, it is radially protruding from the arcuate surface 1209A. Figure 5A The structure shown is more conducive to reducing the space occupied by the electric butterfly valve, and it is also effective in preventing leakage caused by damage to the viewing window component 50 due to impact.

[0080] The structure of the window component 50 is described below by way of example, specifically, as follows: Figure 4-4B As shown, the viewing window component 50 includes a cylindrical, hollow threaded portion 51 and a viewing window portion 52. The threaded portion 51 includes a viewing channel 510, through which the portion of the aforementioned scale display portion 321 opposite to the viewing window portion 52 can be observed. That is, the position of the scale display portion 321 on the valve stem portion 32 is adapted to the position of the viewing channel 510. For example, Figure 4D As shown, the scale 02 on the valve stem portion 32 can be observed. In this embodiment, the viewing window portion 52 can be a transparent glass plate. The viewing channel 510 is connected to the axial hole 1200 of the seat body 12, which facilitates observation. Of course, the two can also be disconnected, for example, other isolation components can be installed in the viewing channel 510, but these isolation components do not obstruct the observation of the scale display portion 321 from the viewing window portion 52. Figure 4D The markings on the valve stem 32 correspond to the opening degree of the valve core 31, making it convenient and clear to observe the opening degree of the valve core 31, for example... Figure 4C , Figure 4C-1 and Figure 4D As shown, in this embodiment, the valve stem portion 32 is specifically a columnar valve stem that is separately disposed from the valve core portion 31. Its lower end is connected to the valve core portion 31, and its upper end is the upper valve stem connecting portion 324. The upper valve stem connecting portion 324 is inserted into and cooperates with the valve stem driving portion 1523 of the connecting frame 152. A sealing ring mounting groove 323 is provided on its peripheral wall. In this embodiment, there are three sealing ring mounting grooves 323, which are arranged at axial intervals on the valve stem 32. The sealing ring mounting grooves 323 are used to install the corresponding number of sealing elements 70 described below.

[0081] As shown in the figure, in this embodiment, the scale display mechanism 320 of the scale display section 321 is specifically composed of the numbers 0, 2, 4, 6, 8 and corresponding scale lines directly laser-printed on the circumferential wall of the valve stem 32. The value 2 can indicate that the angle of rotation of the valve core section 31 relative to the axis of the valve stem section 32 is in the range of 1-5 degrees, the value 3 can indicate that the angle of rotation of the valve core section 31 relative to the axis of the valve stem section 32 is in the range of 6-10 degrees, and so on.

[0082] As a variation, such as Figure 8As shown, the connecting frame 152 may also include a scale display section 321, that is, the scale display section 321 is provided on the peripheral wall of the connecting frame 152, and the scale display mechanism 320 thereon can be the same as the scale display mechanism shown in Embodiment 1. It is understood that, when other structures and dimensions remain unchanged, in this embodiment, the portion of the valve stem drive section 1523 extending into the axial hole 1200 of the seat body is longer, so that the scale display section 321 is within the visible range of the viewing window component 50.

[0083] Furthermore, to facilitate and accurately observe the scale display mechanism 320, in this embodiment, the viewing window component 50 is installed vertically relative to the base 12. That is, when observing the internal scale of the valve stem, the human eye can observe from the side of the base 12. Additionally, the viewing window component mounting portion 1208 is recessed relative to the base 1207 of the base 12, which can prevent the viewing window component from being damaged to some extent and also reduces the installation space required during use. Several O-rings 1209, as described above, are provided between the threaded portion 51 and the viewing window portion 52 to prevent fluid inside the valve from leaking out through the gap between the viewing window component 50 and the base 12. Figure 4A As shown, two O-rings 1209 are provided on the outer periphery of the threaded portion 51.

[0084] It is understandable that the aforementioned window component 50 can also be welded and fixed to the base 12. That is, the window component 50 and the base 12 are connected non-detachably.

[0085] Of course, it is understandable that in order to prevent the viewing window component 50 from interfering with the rotation of the valve stem portion 32, the end of the viewing window component 50 located inside the seat 12 does not contact the valve stem portion 32. That is, in the lateral direction of the electric butterfly valve, the two are set at a certain distance, i.e., they do not contact each other.

[0086] As another specific solution, the window portion 52 of the window component 50 can be directly installed within the viewing channel 510, for example... Figure 10 As shown, the viewing window 52 is glass 56 (glass 56 is only an example of one embodiment). Glass 56 can be connected to the threaded portion 51 by a snap ring, or other components can be added inside the threaded portion 51 to limit the viewing window 52. To correspond the observed value of the scale display to the opening degree of the valve core 31, as... Figure 11 As shown, an indicator 57 is also provided on the glass 56. The indicator 57 can be... Figure 11 The line segment shown could be a diameter segment, a radius segment, or other shorter line segments or arrows, etc. Figure 11 As shown, when you want to observe the valve core opening degree 32, Figure 11 The scale of valve core 32 is shown to be between the valve core opening degrees corresponding to values ​​0 and 2.

[0087] The electric butterfly valve proposed in this invention features an internally visualized structure, enabling its application in complex systems requiring visualization. This avoids the difficulties encountered when the unit malfunctions after the electric butterfly valve is installed, such as the inconvenience of confirming valve abnormalities or verifying the consistency between the actual valve opening position and the programmed opening position, which hinders the main unit manufacturer's ability to quickly locate the fault. When an abnormality is confirmed, the upper valve section 10 and lower valve section 20 are detachably connected. If necessary, the upper valve section 10 and lower valve section 20 can be separated, and the valve core component 30 and lower valve body 20 can be removed for repair or replacement.

[0088] The electric butterfly valve of this application can be used in oil-free system environments such as magnetic levitation centrifuge units. Especially in oil-free systems, high requirements are placed on the friction reduction of moving parts, such as the transmission reliability and service life of the gear set 153. This is particularly important when the electric butterfly valve needs to be installed horizontally (i.e.,...). Figure 2 When installed by rotating 90 degrees in the indicated direction, the feasibility requirements for transmission mechanisms such as gear sets are even higher.

[0089] like Figure 1 , Figure 4A and Figures 7 to 7B As shown, Figure 3 The gear set 153 shown can be a four-stage gear set, but this is not a limitation on the number of gear stages in the gear set 153.

[0090] As shown in the figure, in the longitudinal direction of the electric butterfly valve, from top to bottom, the gear set 153 includes at least a first-stage gear set 1531 and a second-stage gear set 1532. In this embodiment, it also includes a third-stage gear set 1533 and a fourth-stage gear set 1534. Adjacent gear sets are connected by a planetary carrier 160. Specifically, as shown in the figure, a first-stage planetary carrier 1601 is provided between the first-stage gear set 1531 and the second-stage gear set 1532; a second-stage planetary carrier 1602 is provided between the second-stage gear set 1532 and the third-stage gear set 1533; and a third-stage planetary carrier 1603 is provided between the third-stage gear set 1533 and the fourth-stage gear set 1534. The fourth-stage gear set 1534 is adapted to the connecting bracket 152.

[0091] The electric butterfly valve has several short shafts 160 connected to each stage of the planetary carrier. Specifically, the first stage short shaft 1631 includes three short shafts 160 connected to the first stage planetary carrier 1601 and located between the first stage gear set 1531 and the second stage gear set 1532. Each short shaft 160 passes through the three gears 1530 of the first stage gear set 1531. The second stage short shaft 1632 includes three short shafts 160 connected to the second stage planetary carrier 1603 and located between the second stage gear set 1532 and the third stage gear set 1533, passing through the corresponding three gears 1530 of the second stage gear set 1532. The third stage short shaft 1633 includes three short shafts connected to the third stage planetary carrier 1603 and located between the third stage gear set 1533 and the fourth stage gear set 1534, passing through the corresponding three gears 1530 of the third stage gear set 1533. The connecting bracket 152 is connected to the fourth stage short shaft 1634, and the corresponding three gears 1530 of the fourth stage gear set 1534 pass through each short shaft 160 of the fourth stage short shaft 1634.

[0092] like Figure 7A As shown, each planetary carrier (1601, 1602, 1603) has at least two upper bosses 1612 on one side facing the corresponding gear set (1531, 1532, 1533) it supports. The upper end of each upper boss 1612 abuts against the corresponding gear 1530, and the lower end of each upper boss is lower than the lower end of its corresponding gear; that is, the lower surface of the gear 1530 partially abuts against the upper boss 1612. The upper bosses 1612 are evenly distributed circumferentially around the corresponding planetary carrier. For example, when there are two, the two upper bosses 1612 are located radially; when there are three, adjacent upper bosses 1612 are spaced 120 degrees apart. The arrangement of the upper bosses 1612 reduces the contact area between the lower end of the corresponding gear set located above the corresponding planetary carrier and the corresponding planetary carrier, thereby reducing contact friction between the gear set and the planetary carrier.

[0093] like Figure 3 and Figure 7B As shown, a lower boss 1613 is also provided on the side of the third-stage planetary carrier 1603 facing the connecting frame 152. The number of lower bosses 1613 and their circumferential distribution in the third-stage planetary carrier 1603 can be the same as or different from the aforementioned upper bosses 1612. The principle of setting the lower bosses 1613 is the same as that of the aforementioned upper bosses 1612, which can reduce the contact friction between the third-stage planetary carrier 1603 and the connecting frame 152.

[0094] The aforementioned upper boss 1612 and lower boss 1613 can also be annular bosses surrounding the corresponding short shaft of their respective stages, thus making the support of the planetary carrier of the corresponding stage for the corresponding gear set more stable. When the wear-resistant part 170 is provided, the upper part of the upper boss 1612 supports the lower part of the wear-resistant part 170 and partially supports the gear set of the corresponding stage. While playing a role in reducing wear, it also provides direct support for the wear-resistant part 170.

[0095] A wear-resistant component 170 is provided between at least one short shaft 160 and the gear 1530 that engages with it. Specifically, in this embodiment, a non-metallic wear-resistant component 170 is provided between the gear of the gear set 153 that engages with the short shaft 160 and its corresponding short shaft. The addition of the wear-resistant component 170 avoids direct metal-to-metal friction and replaces it with non-metal-to-metal friction, thereby improving the service life of the gear set 153. In other words, the service life of the electric butterfly valve can be improved through local design improvements without changing other structural designs. The material of the wear-resistant component 170 can be PEEK, PTFE, etc.

[0096] exist Figures 1-7 In the illustrated embodiment, a wear-resistant component 170 made of non-metallic material may be provided between each short shaft 160 and the gear 1530. The wear-resistant component 170 may be as follows: Figure 7B As shown, the wear-resistant part 170 is T-shaped with a central through hole. Specifically, it may include a cylindrical portion 1701 and a limiting portion 1702. The cylindrical portion 1701 is sleeved on the outside of the short shaft 160 and has a clearance fit with the short shaft 160. The cylindrical portion 1701 also has a clearance fit with the gear 1530 for easy assembly. The limiting portion 1702 is located below the gear 1530 corresponding to the short shaft 160. Its function is to prevent the short shaft 160 from moving upward during the operation of the gear set and to prevent the wear-resistant part 170 from falling off the top of the corresponding planetary carrier. In addition, the limiting portion 1702 also has the following function: reducing the contact area between the corresponding gear 1530 and the corresponding planetary carrier, thereby reducing the frictional force experienced by the corresponding gear during rotation.

[0097] In further technical solutions, such as Figure 7A As shown, the wear-resistant part 170 can also be a rolling friction part, such as a ball bearing, sleeved on the outer periphery of the short shaft 160. This can change the original sliding friction between metals to rolling friction between the rolling friction part and the metal, effectively reducing friction and improving the life of the gear set.

[0098] In the aforementioned gear component 15, a fixing member 19 may be provided below all or part of the short shaft; that is, the electric butterfly valve includes at least one fixing member 19, which also serves the function of the aforementioned limiting part 1702. For example, when the wear-resistant part 170 is a columnar shape without the aforementioned limiting part 1702, that is, the gear component 15 also includes several fixing members 19, such as... Figure 7A and 7B As shown, the fixing member 19 is located between the corresponding planetary carriers below the gears and is fixedly connected to the wear-resistant member 170. For example, the fixing member 19 is welded to the lower end of the wear-resistant member 170. In a further embodiment, when the wear-resistant member 170 is not provided, in order to further improve the axial movement between the short shaft 160 and the gear, the fixing member 19 is at least partially located below the corresponding stage planetary carrier, and in addition to being fixedly connected to the short shaft 160, the fixing member 19 is also welded to the adjacent corresponding planetary carrier. Specifically, the lower end of the first stage short shaft 1631 is welded with the fixing member 19, and the fixing member 19 is also welded to the first stage planetary carrier 1601. The lower end of the second stage short shaft 1632 is welded with the fixing member 19, and the fixing member 19 is also welded to the second stage planetary carrier 1602. The lower end of the third stage short shaft 1633 is welded with the fixing member 19, and the fixing member 19 is also welded to the third stage planetary carrier 1603.

[0099] like Figure 7E As shown, when the fastener 19 is welded to each planetary carrier, the surface of the corresponding planetary carrier facing the fastener 19 can be a plane, and the fastener 19 is welded to this plane. Figure 7F As shown, the lower ends of the connecting frame 152 and part or all of the planetary carriers (first-stage planetary carrier 1601, second-stage planetary carrier 1602, and third-stage planetary carrier 1603) can also be provided with recesses 1640 corresponding to the shape of the lower end of the fixing member 19. The lower end of the fixing member 19 is located in the recess 1640 and welded to the recess 1640, so that the gear components do not increase the axial space due to the addition of the fixing member 19. The aforementioned fixing member can be a gasket made of stainless steel, which is easy to process. The fixing member 19 is provided with an insertion hole 191 in the middle for the lower end of the short shaft 160 to be inserted, which is convenient for assembly and processing.

[0100] In a further proposed solution, such as Figure 2 and Figure 7As shown, a liner 154 is also provided above the first-stage gear set 1531. The first-stage gear set 1531 and the first-stage short shaft 1631 are located below the liner 154. The liner 154 is provided with corresponding plate holes 1540 for each of the first-stage short shafts 1631 below it. The upper end of the first-stage short shaft 1631 is located in the plate hole 1540 and cooperates with the plate hole 1540, thereby fixing the liner 154 circumferentially relative to the first-stage gear set 1531 and the first-stage short shaft 1631. That is, the liner 154 will not move arbitrarily relative to the first-stage gear set 1531 and the first-stage short shaft 1631 in the circumferential direction. The gear ring 150 includes an upper limit portion 159, which is located above the liner 154 and limits the upward axial movement of the liner 154. The liner 154 limits the upper movement of the first-stage gear set and the first-stage short shaft, and also improves the upward axial movement of the first-stage gear set 1531. In this embodiment, the liner 154 can be set above all gear sets in this manner, or selectively, for example, only above the first-stage gear set 1531, the third-stage gear set 1533, and the fourth-stage gear set 1534. The connection method between the liner 154 and the corresponding short shaft can also be the same as described above.

[0101] like Figure 2 and Figures 7-7D As shown, the connecting frame has a valve stem anti-friction component 33 fitted around the outer periphery of the valve stem portion 32. This component can be cylindrical and made of materials with anti-friction properties, such as PEEK. Figure 7C As shown, an annular recess 322 is formed on the peripheral wall of the valve stem portion 32, and the valve stem wear-resistant component 33 is located in the annular recess 322. By providing the valve stem wear-resistant component 33, the service life of the valve stem portion 32 is improved, and the rotation of the valve stem portion 32 is made more flexible.

[0102] like Figure 3 As shown, the valve core component 30 also includes a lower positioning member 34, specifically, as... Figure 3 As shown, the lower positioning member 34 is supported by the cover 30, which is fixedly connected to the valve body 21 by screws or bolts. The lower positioning member 34 is at least partially located within the second base 2123 of the valve body 21 and is in a sealing fit with the inner wall of the second base 2123. The upper end of the lower positioning member 34 is located within the lower end of the valve core 31, and the two are in a concave-convex fit. At least one sealing element 70 is sleeved on the outer periphery of the valve stem 32 and the lower positioning member 34 to prevent leakage.

[0103] like Figure 3 and Figure 7DAs shown, the lower end of the valve core 31 includes a receiving hole 310. The upper end of the lower positioning member 34 is inserted into the receiving hole 310. A valve core anti-friction member 37 is also installed within the receiving hole 310. Specifically, in this embodiment, the valve core anti-friction member 37 is made of a non-metallic material. The valve core anti-friction member 37 is sleeved on the upper end of the lower positioning member 34, and the lower end face of the valve core anti-friction member 37 does not contact the lower positioning member 34. Figure 7D As shown, the valve core anti-friction component 37 includes an upper positioning portion 371 and a sleeve portion 372. The sleeve portion 372 is located between the outer wall of the lower positioning component 34 and the inner wall of the receiving hole 310. The upper positioning portion 371 is located between the bottom wall of the receiving hole 310 and the upper part of the lower positioning component 34, thus attaching the valve core anti-friction component 37 to the lower positioning component 34. The valve core anti-friction component 37 is used to prevent metal-to-metal friction between the valve core portion 31 and the lower positioning component 34 when the valve core portion 31 rotates.

[0104] like Figure 7 As shown, due to the use of a gear set structure, in order to improve the performance of the electric butterfly valve in the application system compared to other valves... Figure 3 When the direction shown deviates, meaning it is no longer perpendicular to the horizontal direction, the gear set and the gear ring will jam due to meshing. Figure 1 In the illustrated embodiment, the gear component of the electric butterfly valve further includes a positioning shaft 155, which comprises a main positioning section 1551, an upper positioning section 1552, and a lower positioning section 1553. Figure 7 and Figure 9 As shown, the first-stage planetary carrier 1601 includes a first shaft hole 1641, the second-stage planetary carrier 1602 includes a second shaft hole 1642, and the third-stage planetary carrier 1603 includes a third shaft hole 1643. The lower end of the motor shaft 142 is located inside the first shaft hole 1641. The upper positioning section 1551 of the positioning shaft 155 is located inside the first shaft hole 1641 and is either interference-fitted or has a small clearance fit. After the positioning shaft 155 passes through the second-stage planetary carrier 1602 and the third-stage planetary carrier 1603, its lower positioning section 1553 extends into the upper groove 1524 of the connecting frame 152 and is either interference-fitted or has a small clearance fit. The positioning shaft 155 strings together the gear sets of the gear group 153 like a candied hawthorn. The positioning shaft 155 has an over- or clearance fit with the upper groove 1524. Since the connecting frame 152 is guided by the seat 12 and does not deflect circumferentially, and the lower end of the positioning shaft 155 is located in the upper groove 1524 of the connecting frame 152, the positioning shaft 155 can improve the situation where the gear sets of the gear group 153 get stuck when they mesh with the gear ring when the electric butterfly valve deflects.

[0105] Furthermore, such as Figure 9 and Figure 7 The third shaft hole 1643 of the third planetary carrier 1603 can be used to install a first support bearing 180 made of non-metallic material, thereby reducing the friction between the positioning shaft 155 and the planetary carrier.

[0106] The positioning shaft 155 passes through the inner hole of the first support bearing 180. The upper end of the first bearing 180 is higher than the upper end of the second planetary carrier 1602 and supports the second support bearing 190. The second support bearing 190 is sleeved on the outer periphery of the positioning shaft 155. The upper end of the second support bearing 190 is higher than the second planetary carrier 1602, and the positioning shaft 155 passes through the second support bearing 190. The upper end of the second support bearing 190 abuts against the lower end of the first planetary carrier. The arrangement of the first support bearing 180 and the second support bearing 190 can reduce the friction of the corresponding contact surfaces.

[0107] The above embodiment specifically illustrates an example of mounting the viewing window component 50 on the base 12. Based on the description of the above embodiment, different combinations can form different embodiments, all of which are within the scope of protection of this application. For example, a hole communicating with the valve cavity can be opened in the side wall of the valve body 21, and the viewing window component 50 can be mounted at the location of this hole. Correspondingly, a scale display mechanism can be provided at a corresponding part of the valve stem portion 32, and the scale can also be observed through the viewing window component 50. This is not shown in the accompanying drawings.

[0108] It should be noted that the above description is merely an example of specific embodiments of the present invention and should not be construed as a limitation on the protection points of the present invention. It should be pointed out that for those skilled in the art, the structural features in the different figures above can be combined to form different embodiments without departing from the principle of the present invention, and several improvements and modifications can also be made. These improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. An electric butterfly valve, comprising a valve core component (30) and a viewing window component (50), wherein the valve core component (30) is at least partially located in the inner cavity of the electric butterfly valve, the valve core component includes a valve core portion, the valve core component includes a scale display mechanism (320), and the value of the scale display mechanism (320) corresponds to the opening degree of the valve core portion (31); The electric butterfly valve includes a mounting hole (1208B), the window component (50) is at least partially located in the mounting hole (1208B), the window component (50) includes a viewing channel (510), the scale display mechanism (320) is positioned to be adapted to the viewing channel (510), and the scale display mechanism (320) can be observed from the viewing channel (510).

2. The electric butterfly valve according to claim 1, characterized in that, The electric butterfly valve includes an upper valve part and a lower valve part. The valve core component (30) is at least partially located in the inner cavity of the lower valve part (20). The valve core component includes a valve stem part (32). The upper valve part (32) includes a seat (12). The seat (12) includes the mounting hole (1208B) and the seat (12) includes a seat axial hole (1200). The valve stem part (32) includes the scale display mechanism (320), which is located in the seat axial hole (1200).

3. The electric butterfly valve according to claim 1 or 2, characterized in that, The upper valve part (10) further includes a housing part (11), a motor part (14) and a gear part (15). The housing part (11) is fixedly connected to the seat (12). The motor part (14) is located inside the housing part (11). The gear part (15) is located between the motor part (14) and the seat (12). The gear part (15) includes a connecting frame (152). The connecting frame (152) is pulsatorically connected to the valve stem part (32).

4. The electric butterfly valve according to claim 3, characterized in that, The connecting frame can drive the valve stem (32) to rotate, and the valve stem (32) can drive the valve core (31) to rotate. The connecting frame includes the scale display mechanism.

5. The electric butterfly valve according to any one of claims 1-4, characterized in that, The mounting hole (1208B) is perpendicular to the axial hole (1200) of the seat; the inner wall of the mounting hole (1208B) is threaded to the window component (50) or the window component (50) is welded to the seat (12); one end of the window component (50) facing the valve stem portion (32) is at a distance from the scale display mechanism (320).

6. The electric butterfly valve according to claim 4, characterized in that, The housing component (11) is welded and fixed to the seat (12). The lower valve part (20) includes a valve body (21). The valve body (21) includes a fixing part (211) and a valve body base (212). The valve body base (212) includes a first base (2121) and a valve core mounting part (2122). The first base (2121) is located between the fixing part (211) and the valve core mounting part (2122). The valve core part (31) is located inside the valve core mounting part (2122). The valve stem part (32) passes through the first base (2121). The fixing part (211) is detachably fixed to the seat (12).

7. The electric butterfly valve according to claim 6, characterized in that, The gear component (15) further includes a gear ring (150) and a gear set (153), the gear set (153) being located within the gear ring, the gear set including a first-stage gear set (1531), a first-stage planetary carrier (1601), a second-stage gear set (1532), a second-stage planetary carrier (1602), a third-stage gear set (1533), a third-stage planetary carrier (1603), and a fourth-stage gear set (1534); The first-stage planetary carrier (1601) is connected to the first-stage short shaft (1631). The number of gears (1530) in the first-stage gear set (1531) corresponds to the number of the first-stage short shafts (1631). Each gear (1530) in the first-stage gear set (1531) passes through each short shaft (160) of the first-stage short shaft (1631). The second-stage planetary carrier (1602) is connected to the second-stage short shaft (1632). The number of gears (1530) in the second-stage gear set (1532) corresponds to the number of gears in the second-stage short shaft (1632). Each gear (1530) in the second-stage gear set (1532) passes through each short shaft (160) of the second-stage short shaft (1632). The third-stage planetary carrier (1603) is connected to a third-stage short shaft (1633). The number of gears (1530) in the third-stage gear set (1533) corresponds to the number of the third-stage short shafts (1633). Each gear (1530) in the third-stage gear set (1533) passes through each short shaft (160) of the third-stage short shafts (1633). A wear-resistant component (170) is provided between the outer wall of at least one short shaft (160) and the inner wall of its corresponding gear (1530), the wear-resistant component (170) being a non-metallic wear-resistant component or a rolling friction component.

8. The electric butterfly valve according to claim 7, characterized in that, The wear-resistant part (170) is made of PEEK or PTFE. The wear-resistant part (170) is sleeved on the outer periphery of the corresponding short shaft (160). The wear-resistant part (170) includes a cylindrical part (1701) and a limiting part (1702). The cylindrical part (1701) is located between the outer wall of the short shaft (160) and the inner wall of the gear (1530) corresponding to the short shaft (160). The limiting part (1702) is located below the corresponding planetary carrier connected to the short shaft (160) to restrict the wear-resistant part (170) from coming off the top of the corresponding planetary carrier.

9. The electric butterfly valve according to claim 3, characterized in that, The gear component (15) further includes a gear ring (150) and a gear set (153). The gear set (153) is located inside the gear ring (150). The gear set (153) includes a first-stage gear set (1531), a first-stage planetary carrier (1601), a second-stage gear set (1532), a second-stage planetary carrier (1602), a third-stage gear set (1533), a third-stage planetary carrier (1603), and a fourth-stage gear set (1534). The fourth-stage gear set (1534) is located between the third-stage planetary carrier (1603) and the connecting frame (152), and the fourth-stage gear set (1534) is adapted to the connecting frame (152). The first-stage planetary carrier (1601) is connected to the first-stage short shaft (1631). The number of gears (1530) in the first-stage gear set (1531) corresponds to the number of short shafts in the first-stage short shaft (1631). Each gear (1530) in the first-stage gear set (1531) passes through each short shaft (160) of the first-stage short shaft (1631). The second-stage planetary carrier (1602) is connected to the second-stage short shaft (1632). The number of gears (1530) in the second-stage gear set (1532) corresponds to the number of short shafts in the second-stage short shaft (1632). Each gear (1530) in the second-stage gear set (1532) passes through each short shaft of the second-stage short shaft (1632). The third-stage planetary carrier (1603) is connected to a third-stage short shaft (1633). The number of the third-stage gear set (1533) corresponds to the number of short shafts of the third-stage short shaft (1603). Each gear (1530) of the third-stage gear set (1533) passes through each short shaft of the third-stage short shaft (1633). The upper valve part (10) also includes at least one fixing member (19), which is fixedly connected to the lower end of the short shaft (160) and is welded to the planetary carrier corresponding to the short shaft.

10. The electric butterfly valve according to claim 6, characterized in that, The valve core component (30) further includes a lower positioning member (34), the valve body (21) further includes a second base (2123), the valve core mounting part (2122) is located between the second base (2123) and the first base (2121), the lower positioning member (34) is partially located in the second base (2123), the valve core component (31) includes a receiving hole (310), the upper end of the lower positioning member (34) is located in the receiving hole (310), the valve core anti-wear member (37) is located in the receiving hole (310), and the valve core anti-wear member (37) is sleeved on the upper end of the lower positioning member (34).

11. The electric butterfly valve according to claim 6, characterized in that, The outer wall of the valve stem portion (32) includes an annular recess (322), and the valve stem wear-reducing component (33) is sleeved in the annular recess (322). The valve stem wear-reducing component (33) is located between the valve stem portion (32) and the first base portion (2121) of the valve body (21).

12. The electric butterfly valve according to claim 7 or 9, characterized in that, The upper valve part (10) further includes a liner (154), which is located above the first stage gear set (1531) and the first stage short shaft (1631). The gear ring (150) includes an upper limit part (159), and the liner (154) is located between the upper limit part (159) and the first stage short shaft (1631). The liner (154) includes a plate hole (1540) corresponding to the number of corresponding stage short shafts, and the upper end of the corresponding stage short shaft is located in the plate hole (1540).

13. The electric butterfly valve according to claim 12, characterized in that, The liner (154) is included between the first stage gear set (1531) and the first stage planetary carrier (1601), between the second stage gear set (1532) and the second stage planetary carrier (1602), and between the third stage gear set (1533) and the third stage planetary carrier (1603).

14. The electric butterfly valve according to any one of claims 3-12, characterized in that, The gear component (15) includes a gear ring (150), the gear ring (150) includes a circumferential limiting portion, the circumferential limiting portion includes a first lower protrusion (151A) and a second lower protrusion (151B), the first lower protrusion (151A) and the second lower protrusion (151B) include a first notch (151C) and a second notch (151D), the connecting frame (152) includes a first circumferential protrusion (1522A) and a second circumferential protrusion (1522B); the first circumferential protrusion (1522A) is at least partially located in the first notch (151C), and the second circumferential protrusion (1522B) is at least partially located in the second notch (151D); the first... A circumferential protrusion (1522A) is rotatable within the first notch (151C), and a second circumferential protrusion (1522B) is rotatable within the second notch (151D) so that the first lower protrusion (151A) and the second lower protrusion (151B) restrict the rotational stroke of the connecting frame (152); the seat (12) includes a first upper protrusion (121A) and a second upper protrusion (121B), at least one of the first lower protrusion (151A) and the second lower protrusion (151B) abuts against the first upper protrusion (121A), and at least the other abuts against the second upper protrusion (121B) so that the seat (12) restricts the rotation of the gear ring (150).

15. The electric butterfly valve according to any one of claims 3-13, characterized in that, The gear component (15) includes a gear ring (150), the gear ring (150) includes a circumferential limiting portion, the circumferential limiting portion includes a first lower protrusion (151A) and a second lower protrusion (151B), a first notch (151C) and a second notch (151D) are included between the first lower protrusion (151A) and the second lower protrusion (151B), the connecting frame (152) includes a first circumferential protrusion (1522A) and a second circumferential protrusion (1522B); the first circumferential protrusion (1522A) is at least partially located in the first notch (151C), the second circumferential protrusion (1522B) is at least partially located in the second notch (151D); the first circumferential protrusion (1522A) is rotatable within the first notch (151C), and the second circumferential protrusion (1522A) is rotatable within the first notch (151C). B) The seat (12) is rotatable within the second notch (151D) so that the first lower protrusion (151A) and the second lower protrusion (151B) restrict the rotational stroke of the connecting frame (152); the seat (12) includes a first upper protrusion (121A) and a second upper protrusion (122B), at least one of the first lower protrusion (151A) and the second lower protrusion (151B) abuts against the first upper protrusion (121A) and at least the other abuts against the second upper protrusion (121A) so that the seat (12) restricts the rotation of the gear ring (150); it also includes a positioning member (80), the seat (12) includes a first positioning hole (81), the valve body (12) includes a second positioning hole (82), and the positioning member (80) is partially located in the first positioning hole (81) and partially located in the second positioning hole (82).

16. The electric butterfly valve according to any one of claims 3-15, characterized in that, The gear component (15) further includes a positioning shaft (155). The first-stage planetary carrier (1601) includes a first shaft hole (1641), the second-stage planetary carrier (1602) includes a second shaft hole (1642), and the third-stage planetary carrier (1603) includes a third shaft hole (1643). The connecting bracket (152) includes an upper groove (1524). The positioning shaft (155) passes through the second shaft hole (1642) and the third shaft hole (1643). The positioning shaft (155) includes a main positioning section (1551) and an upper positioning section (1552). The main positioning section (1551) passes through the second-stage planetary carrier (1602) and the third-stage planetary carrier (1603). The upper positioning section (1152) is located in the first shaft hole (1641). The upper positioning section (1552) is interference-fitted or has a small clearance fit with the hole wall of the first shaft hole (1641). The lower positioning section (1553) is located in the upper groove (1524). The lower positioning section (1553) is interference-fitted or has a small clearance fit with the upper groove (1524).

17. The electric butterfly valve according to any one of claims 3-16, characterized in that, The upper end of at least one of the first-stage planetary carrier (1601), the second-stage planetary carrier (1602), and the third-stage planetary carrier (1603) includes an upper boss (1612) facing one side of the corresponding stage gear set it supports, and the lower end of the gear (150) partially abuts against the upper end of its corresponding upper boss (1612).

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