Electric stop valve

Abstract

The utility model provides an electric stop valve which comprises a shell structure, a valve element structure, a driving component, a pre-tightening structure and an elastic gasket, a valve port is formed in the shell structure, the valve element structure is arranged in the shell structure to open and close the valve port, the driving component comprises a driving shell and a driving assembly arranged in the driving shell, and the pre-tightening structure is arranged in the driving shell. One end of the driving shell extends into a cavity of the shell structure, a bottom wall limiting face is formed in the cavity of the shell structure, the elastic gasket is clamped between the bottom wall limiting face and the end of the driving shell, the driving shell is in threaded connection with the shell structure through the pre-tightening structure, and the pre-tightening structure applies force towards the elastic gasket to the driving shell. The driving assembly is connected with the valve element structure and drives the valve element structure to rotate. The reactive force of the elastic gasket enables fixation of the driving shell to be more reliable, connection of the pre-tightening structure and the shell structure to be more reliable, looseness at the connection position is avoided, rotation of the driving component relative to the shell structure during use is avoided, and product reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, specifically, relate to a kind of electric stop valve. BACKGROUND

[0002] Electric stop valve is applied to air conditioning system and other equipment, and the opening and closing of valve port are controlled by electric drive mode, so as to realize the on-off of pipeline.In the related art, the valve core structure is arranged in the shell structure of electric stop valve, and the shell structure is connected with driving component, and during the rotation of valve core structure driven by driving structure, the valve core structure has reaction force to driving structure, and under long-term working condition, there is risk of relative circumferential rotation between driving component and shell structure, which affects the connection stability of driving component and shell structure. SUMMARY

[0003] The utility model provides a kind of electric stop valve to avoid the problem that driving component is rotated relative to shell structure when electric stop valve is used.

[0004] To solve the above problems, the utility model provides a kind of electric stop valve, including shell structure, valve core structure, driving component, pre-tightening structure and elastic gasket, the valve port is arranged in the shell structure, the valve core structure is arranged in the shell structure to open and close valve port, the driving component includes driving shell and driving assembly arranged in driving shell, one end of driving shell is inserted into the cavity of shell structure, bottom wall limit surface is formed in the cavity of shell structure, elastic gasket is clamped between bottom wall limit surface and the end of driving shell, driving shell is connected with shell structure by pre-tightening structure, pre-tightening structure applies force to driving shell towards elastic gasket, driving assembly is connected with valve core structure and drives valve core structure to rotate.

[0005] Further, the elastic gasket is annular structure of metal material, and the opposite sides of the elastic gasket are provided with layers of sealing material of non-metal, the layer of sealing material on one side is in sealing cooperation with the bottom wall limit surface, and the layer of sealing material on the other side is in sealing cooperation with the end surface of the driving shell.

[0006] Further, the elastic gasket includes a first flat washer, a tapered transition ring and a second flat washer arranged in sequence, the inner ring of the first flat washer is connected with the larger-diameter end of the tapered transition ring, and the outer ring of the second flat washer is connected with the smaller-diameter end of the tapered transition ring; wherein, the first flat washer abuts against the bottom wall limit surface and the second flat washer abuts against the end surface of the driving shell, or the second flat washer abuts against the bottom wall limit surface and the first flat washer abuts against the end surface of the driving shell.

[0007] Further, the pre-tightening structure is a pre-tightening nut with external threads, the pre-tightening nut is sleeved on the driving shell, there is a gap between the inner wall of the pre-tightening nut and the driving shell, and the external threads of the pre-tightening nut are matched with the internal threads of the shell structure.

[0008] Further, the surface of the pre-tightening structure abutting against the driving housing is provided with an anti-skid groove, and / or the surface of the driving housing abutting against the pre-tightening structure is provided with an anti-skid groove.

[0009] Further, the driving housing has an annular housing limiting surface perpendicular to the axial direction of the valve core structure, and the annular end surface of the pre-tightening structure abuts against the housing limiting surface; wherein the annular end surface of the pre-tightening structure is circumferentially provided with a plurality of anti-skid grooves, and / or the housing limiting surface is circumferentially provided with a plurality of anti-skid grooves.

[0010] Further, the driving component further comprises a housing sealing ring, which is clamped between the inner wall of the housing structure and the outer wall of the driving housing in the radial direction of the valve core structure; and which is located between the pre-tightening structure and the elastic gasket in the axial direction of the valve core structure.

[0011] Further, the housing structure is a one-piece structure, and the housing structure comprises a connecting seat and a valve seat, the valve core structure is arranged in the valve seat, one end of the driving housing extends into the cavity of the connecting seat, the connecting seat has a bottom wall limiting surface, and the pre-tightening structure is connected to the connecting seat; or,

[0012] The housing structure is a split structure, and the housing structure comprises a connecting seat and a valve seat connected to each other, the valve core structure is arranged in the valve seat, one end of the driving housing extends into the cavity of the connecting seat, the connecting seat has a bottom wall limiting surface, and the pre-tightening structure is connected to the connecting seat.

[0013] Further, the driving assembly comprises a driving rotor and a planetary reduction assembly, the planetary reduction assembly is matched with the inner wall of the driving housing, the driving rotor is drivingly connected to the planetary reduction assembly, the driving component further comprises a driving output shaft, the planetary reduction assembly, the driving output shaft and the valve core structure are sequentially connected, and the planetary reduction assembly drives the valve core structure to rotate through the driving output shaft.

[0014] Further, the housing structure has a valve body sealing block, a valve port is formed by a circumferential gap of the valve body sealing block, the valve core structure comprises a valve core main body, a connecting rod and a valve core sealing block connected in sequence, an end surface of the valve core sealing block abuts against an end surface of the valve body sealing block, and the valve core sealing block has a solid structure and a gap in the circumferential direction; wherein the valve port is closed when the solid structure of the valve core sealing block corresponds to the valve port, and the valve port is opened when the gap of the valve core sealing block corresponds to the valve port.

[0015] In the scheme, the housing structure of the electric stop valve is provided with a valve core structure, the valve core structure is controlled to move through the driving assembly of the driving part, so as to open and close the valve port. Wherein, the driving housing of the driving part is connected through the pre-tightening structure and the housing structure, and the elastic gasket is arranged between the bottom wall limiting surface of the housing structure and the end of the driving housing. The pre-tightening structure applies pressure to the driving housing and the elastic gasket in turn, so that the elastic gasket is compressed and elastically deformed. The deformed elastic gasket applies a reaction force to the driving housing and the pre-tightening structure, which is equivalent to the driving housing being clamped between the elastic gasket and the pre-tightening structure. Therefore, the fixation of the driving housing is more reliable, and the reaction force of the elastic gasket also makes the connection of the pre-tightening structure and the housing structure more reliable, avoiding loosening at the connection position and avoiding rotation of the driving part relative to the housing structure during use, thereby improving the reliability of the electric stop valve. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the present application, serve to explain the present application. The present application is shown in the drawings as follows:

[0017] Figure 1 A structure schematic view of the electric stop valve provided by the embodiment of the present application is shown;

[0018] Figure 2 A schematic view of the elastic gasket in Figure 1 is shown;

[0019] Figure 3 A schematic view of the pre-tightening nut in Figure 1 is shown;

[0020] Figure 4 A sectional view of the pre-tightening nut in Figure 3 is shown.

[0021] Among them, the above drawings include the following reference signs:

[0022] 202, valve port; 210, valve seat; 230, valve body sealing block;

[0023] 300, valve core structure; 310, valve core main body; 320, connecting rod; 330, valve core sealing block;

[0024] 400, driving part; 410, driving output shaft; 420, driving rotor; 430, planetary reduction assembly; 440, driving housing; 441, housing limiting surface; 450, housing sealing ring;

[0025] 500, connecting seat; 501, bottom wall limiting surface;

[0026] 610, pre-tightening nut; 611, anti-skid groove; 620, elastic gasket; 621, first flat washer; 622, conical transition ring; 623, second flat washer. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but by no means as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative labor fall within the scope of protection of the present application.

[0028] As shown in the drawings, Figures 1 to 4 The embodiment of the present application provides an electric stop valve, which comprises a shell structure, a valve core structure 300, a driving component 400, a pre-tightening structure and an elastic gasket 620. The shell structure is provided with a valve port 202. The valve core structure 300 is arranged in the shell structure to open and close the valve port 202. The driving component 400 comprises a driving shell 440 and a driving assembly arranged in the driving shell 440. One end of the driving shell 440 extends into the cavity of the shell structure. A bottom wall limiting surface 501 is formed in the cavity of the shell structure. The elastic gasket 620 is clamped between the bottom wall limiting surface 501 and the end of the driving shell 440. The driving shell 440 is threadedly connected with the shell structure through the pre-tightening structure. The pre-tightening structure applies force to the driving shell 440 towards the elastic gasket 620. The driving assembly is connected with the valve core structure 300 and drives the valve core structure 300 to rotate.

[0029] In the present scheme, the shell structure of the electric stop valve is provided with the valve core structure 300. The valve core structure 300 is controlled to move by the driving assembly of the driving component 400, so as to open and close the valve port 202. The driving shell 440 of the driving component 400 is connected with the shell structure through the pre-tightening structure. The elastic gasket 620 is arranged between the bottom wall limiting surface 501 of the shell structure and the end of the driving shell 440. The pre-tightening structure applies pressure to the driving shell 440 and the elastic gasket 620 in sequence. In this way, the elastic gasket 620 is compressed and elastically deformed. The deformed elastic gasket 620 applies reaction force to the driving shell 440 and the pre-tightening structure. It is equivalent that the driving shell 440 is clamped between the elastic gasket 620 and the pre-tightening structure. In this way, the fixation of the driving shell 440 is more reliable. The reaction force of the elastic gasket 620 also makes the connection of the pre-tightening structure and the shell structure more reliable, avoids loosening at the connection position, avoids rotation of the driving component 400 relative to the shell structure during use, and improves the reliability of the electric stop valve.

[0030] As Figure 2 and Figure 3 shown, the elastic gasket 620 is a ring structure made of metal material, which has high strength and can exert a large force on the drive housing 440 after deformation, thereby improving the fixing effect on the drive housing 440.

[0031] The opposite sides of the elastic gasket 620 are provided with non-metallic sealing material layers, one side of which is in sealing cooperation with the bottom wall limiting surface 501, and the other side is in sealing cooperation with the end face of the drive housing 440.

[0032] By arranging annular sealing material layers on the opposite sides of the elastic gasket 620, the drive housing 440 and the bottom wall limiting surface 501 can be respectively abutted and sealed, thereby forming a good seal between the elastic gasket 620 and the bottom wall limiting surface 501, and between the elastic gasket 620 and the drive housing 440, avoiding leakage of the electric shut-off valve in this area, and improving the sealing effect of the electric shut-off valve.

[0033] Specifically, as Figure 2 shown, the elastic gasket 620 includes a first flat washer 621, a tapered transition ring 622 and a second flat washer 623 arranged in sequence, the inner ring of the first flat washer 621 is connected with the large-diameter end of the tapered transition ring 622, and the outer ring of the second flat washer 623 is connected with the small-diameter end of the tapered transition ring 622; wherein the first flat washer 621 abuts against the bottom wall limiting surface 501 and the second flat washer 623 abuts against the end face of the drive housing 440, or the second flat washer 623 abuts against the bottom wall limiting surface 501 and the first flat washer 621 abuts against the end face of the drive housing 440.

[0034] By arranging the tapered transition ring 622, the elastic gasket 620 can be elastically deformed in the axial direction, which can exert a large force on the drive housing 440 after deformation, thereby improving the fixing effect on the drive housing 440. Moreover, the first flat washer 621 and the second flat washer 623 can increase the contact area with the end face of the drive housing 440 and the bottom wall limiting surface 501, thereby increasing the friction force and avoiding the rotation of the drive part 400 relative to the housing structure in the circumferential direction during use.

[0035] As Figure 1 and Figure 4 shown, the pre-tightening structure is a pre-tightening nut 610 with external threads, the pre-tightening nut 610 is sleeved on the drive housing 440, there is a gap between the inner wall of the pre-tightening nut 610 and the drive housing 440, and the external threads of the pre-tightening nut 610 cooperate with the internal threads of the housing structure.

[0036] The driving shell 440 is limited by the pre-tightening nut 610 and fixed by the cooperation between the pre-tightening nut 610 and the internal thread of the shell structure. The deformed elastic washer 620 exerts a counterforce on the driving shell 440 and the pre-tightening structure, which is equivalent to that the driving shell 440 is clamped between the elastic washer 620 and the pre-tightening nut 610. In this way, the fixing of the driving shell 440 is more reliable, and the connection of the pre-tightening nut 610 is more reliable, avoiding loosening of the threaded connection position of the pre-tightening nut 610 during use, thereby avoiding rotation of the driving part 400 relative to the shell structure.

[0037] As shown in Figure 3 and Figure 4 , the surface of the pre-tightening structure abutting against the driving shell 440 is provided with an anti-skid groove 611, and / or the surface of the driving shell 440 abutting against the pre-tightening structure is provided with an anti-skid groove 611.

[0038] By providing the anti-skid groove 611, the friction between the driving shell 440 and the pre-tightening structure at the abutting position is improved, thereby improving the fixing effect of the driving shell 440, enhancing the anti-torque capability, and avoiding circumferential rotation of the driving shell 440 during use.

[0039] Specifically, the driving shell 440 has an annular shell limiting surface 441 perpendicular to the axial direction of the spool structure 300, and the annular end surface of the pre-tightening structure abuts against the shell limiting surface 441; wherein the annular end surface of the pre-tightening structure is circumferentially distributed with a plurality of anti-skid grooves 611, and / or the shell limiting surface 441 is circumferentially distributed with a plurality of anti-skid grooves 611. In this way, the circumferential fixing effect of the driving shell 440 is further improved by the plurality of anti-skid grooves 611 circumferentially distributed on the annular end surface of the pre-tightening structure or the shell limiting surface 441, thereby avoiding circumferential rotation of the driving shell 440.

[0040] As shown in Figure 1 , the driving part 400 further comprises a shell sealing ring 450, which is clamped between the inner wall of the shell structure and the outer wall of the driving shell 440 in the radial direction of the spool structure 300, and is located between the pre-tightening structure and the elastic washer 620 in the axial direction of the spool structure 300.

[0041] By providing the shell sealing ring 450 between the inner wall of the shell structure and the outer wall of the driving shell 440, the sealing effect between the inner wall of the shell structure and the outer wall of the driving shell 440 is improved, thereby avoiding leakage in this area. Specifically, an annular groove can be provided on the inner wall of the shell structure or the outer wall of the driving shell 440, and the shell sealing ring 450 is installed in the annular groove.

[0042] AsFigure 1 As shown, the shell structure is an integral structure, the shell structure includes the connecting seat 500 and the valve seat 210, the valve core structure 300 is arranged in the valve seat 210, one end of the driving shell 440 extends into the cavity of the connecting seat 500, the connecting seat 500 has a bottom wall limiting surface 501, and the pre-tightening structure is connected with the connecting seat 500.

[0043] The connecting seat 500 and the valve seat 210 are integrated into the shell structure, and the connecting seat 500 is connected with the driving component 400, since the connecting seat 500 and the valve seat 210 are an integral structure, the process of connecting the two is not required, thereby reducing the assembly process and avoiding the risk of leakage at the connection position.

[0044] Alternatively, in other embodiments, the shell structure is a split structure, the shell structure includes the connecting seat 500 and the valve seat 210 connected with each other, the valve core structure 300 is arranged in the valve seat 210, one end of the driving shell 440 extends into the cavity of the connecting seat 500, the connecting seat 500 has a bottom wall limiting surface 501, and the pre-tightening structure is connected with the connecting seat 500.

[0045] In this embodiment, the connecting seat 500 and the valve seat 210 are a split structure, so that the connecting seat 500 and the valve seat 210 can be machined respectively, that is, the existing complex integral shell structure is avoided, and the connecting seat 500 and the valve seat 210 in the scheme are machined respectively, so that when the split structure is machined respectively, the length of each part is shorter, the internal structure is convenient to machine, the cutter does not need to be deepened and is not easy to break, and therefore the machining difficulty is reduced. After machining is completed, the valve seat 210 and the driving component 400 are connected with the connecting seat 500 respectively, and the assembly of the electric stop valve is realized.

[0046] As shown in the figure, Figure 1 The driving assembly includes the driving rotor 420 and the planetary reduction assembly 430, the planetary reduction assembly 430 is matched with the inner wall of the driving shell 440, the driving rotor 420 is drivingly connected with the planetary reduction assembly 430, the driving component 400 further includes the driving output shaft 410, the planetary reduction assembly 430, the driving output shaft 410 and the valve core structure 300 are sequentially connected, and the planetary reduction assembly 430 drives the valve core structure 300 to rotate through the driving output shaft 410.

[0047] In the scheme, the planetary reduction assembly 430 is adopted, which can realize the speed reduction of the driving rotor 420 in a compact space and increase the output torque, so that the driving output shaft 410 has sufficient torque to drive the valve core structure 300 to rotate, and the valve core structure 300 will not rotate too fast and is easy to control the rotation angle. And the above structure makes the electric stop valve structure compact and occupies small space.

[0048] Further, the housing structure has a valve body sealing block 230, the valve body sealing block 230 forms a valve port 202 at a circumferential gap, the valve core structure 300 includes a valve core main body 310, a connecting rod 320 and a valve core sealing block 330 connected in sequence, the end surface of the valve core sealing block 330 is in abutment with the end surface of the valve body sealing block 230, and the valve core sealing block 330 has a solid structure and an avoiding gap in the circumferential direction; wherein the valve port 202 is closed when the solid structure of the valve core sealing block 330 corresponds to the valve port 202, and the valve port 202 is opened when the avoiding gap of the valve core sealing block 330 corresponds to the valve port 202.

[0049] With the above arrangement, the valve core sealing block 330 is rotated by the rotation of the valve core main body 310 and the connecting rod 320, so as to change the circumferential position of the solid structure and the avoiding gap of the valve core sealing block 330, the valve port 202 is closed when the solid structure of the valve core sealing block 330 corresponds to the valve port 202, so as to disconnect the valve port 202 from the cavity in the housing structure; the valve port 202 is connected to the avoiding gap when the avoiding gap of the valve core sealing block 330 corresponds to the valve port 202, so as to make the electric shut-off valve in a connected state.

[0050] The above only describes optional embodiments of the present application and is not intended to limit the present application. Various modifications and changes can be made by those skilled in the art to the present application within the spirit and principle of the present application, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0051] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise, and it should be further understood that the terms "comprise" and / or "include" as used herein indicate the presence of the features, steps, operations, devices, components and / or combinations thereof.

[0052] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and operation described. Accordingly, all such variations are intended to be included within the scope of the present application as defined in the claims. The application is also not limited to the details of the foregoing embodiment.

[0053] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by terms such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "horizontal", "top", "bottom", and the like are generally based on the orientation or positional relationships shown in the drawings, and are merely intended to facilitate the description and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the components themselves.

[0054] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", and the like can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0055] In addition, it should be noted that the use of the terms "first", "second", and the like, to describe various components, is merely intended to differentiate one component from another, and does not imply a special meaning unless otherwise stated. Therefore, it cannot be construed as limiting the scope of protection of the present application.

Claims

1. An electric shut-off valve, characterized in that The valve comprises a housing structure, a valve core structure (300), a driving component (400), a pre-tightening structure and an elastic gasket (620), the housing structure is internally provided with a valve port (202), the valve core structure (300) is arranged in the housing structure to open and close the valve port (202), the driving component (400) comprises a driving housing (440) and a driving assembly arranged in the driving housing (440), one end of the driving housing (440) extends into a cavity of the housing structure, a bottom wall limiting surface (501) is formed in the cavity of the housing structure, the elastic gasket (620) is clamped between the bottom wall limiting surface (501) and the end of the driving housing (440), the driving housing (440) is threadedly connected with the housing structure through the pre-tightening structure, the pre-tightening structure applies a force to the driving housing (440) towards the elastic gasket (620), and the driving assembly is connected with the valve core structure (300) and drives the valve core structure (300) to rotate.

2. Motor-operated stop valve according to claim 1, characterized in that The elastic gasket (620) is a ring-shaped structure made of metal, and opposite sides of the elastic gasket (620) are provided with layers of non-metal sealing materials, one side of the layer of sealing material is sealingly matched with the bottom wall limiting surface (501), and the other side of the layer of sealing material is sealingly matched with an end surface of the driving housing (440).

3. The motor-operated globe valve of claim 1, wherein The elastic gasket (620) comprises a first flat gasket (621), a tapered transition ring (622) and a second flat gasket (623) arranged in sequence, the inner ring of the first flat gasket (621) is connected with one end of the tapered transition ring (622) with a large diameter, and the outer ring of the second flat gasket (623) is connected with the other end of the tapered transition ring (622) with a small diameter; wherein, the first flat gasket (621) abuts against the bottom wall limiting surface (501), and the second flat gasket (623) abuts against the end surface of the driving housing (440), or the second flat gasket (623) abuts against the bottom wall limiting surface (501), and the first flat gasket (621) abuts against the end surface of the driving housing (440).

4. The motor-operated globe valve of claim 1, wherein The pre-tightening structure is a pre-tightening nut (610) with external threads, the pre-tightening nut (610) is sleeved on the driving housing (440), there is a gap between the inner wall of the pre-tightening nut (610) and the driving housing (440), and the external threads of the pre-tightening nut (610) are matched with the internal threads of the housing structure.

5. The motor-operated globe valve of claim 1, wherein The surface, at which the pre-tightening structure abuts against the driving housing (440), is provided with an anti-slip groove (611), and / or the surface, at which the driving housing (440) abuts against the pre-tightening structure, is provided with an anti-slip groove (611).

6. Motor-operated stop valve according to claim 5, characterized in that The driving housing (440) has an annular housing limiting surface (441) perpendicular to the axial direction of the valve core structure (300), and the annular end surface of the pre-tightening structure abuts against the housing limiting surface (441); wherein the annular end surface of the pre-tightening structure is circumferentially provided with a plurality of anti-skid grooves (611), and / or the housing limiting surface (441) is circumferentially provided with a plurality of anti-skid grooves (611).

7. The motor-operated globe valve of claim 1, wherein The driving component (400) further comprises a housing sealing ring (450) which, in the radial direction of the valve core structure (300), is clamped between the inner wall of the housing structure and the outer wall of the driving housing (440); and in the axial direction of the valve core structure (300), is located between the pre-tightening structure and the elastic gasket (620).

8. The electric shut-off valve according to claim 1, characterized in that The housing structure is a one-piece structure, and the housing structure comprises a connecting seat (500) and a valve seat (210), the valve core structure (300) is arranged in the valve seat (210), one end of the driving housing (440) extends into the cavity of the connecting seat (500), the connecting seat (500) has the bottom wall limiting surface (501), and the pre-tightening structure is connected to the connecting seat (500); or The housing structure is a split structure, and the housing structure comprises a connecting seat (500) and a valve seat (210) connected to each other, the valve core structure (300) is arranged in the valve seat (210), one end of the driving housing (440) extends into the cavity of the connecting seat (500), the connecting seat (500) has the bottom wall limiting surface (501), and the pre-tightening structure is connected to the connecting seat (500).

9. The motor-operated globe valve of claim 1, wherein The driving assembly comprises a driving rotor (420) and a planetary reduction assembly (430), the planetary reduction assembly (430) is matched with the inner wall of the driving housing (440), the driving rotor (420) and the planetary reduction assembly (430) are drivingly connected, the driving component (400) further comprises a driving output shaft (410), the planetary reduction assembly (430), the driving output shaft (410) and the valve core structure (300) are sequentially connected, and the planetary reduction assembly (430) drives the valve core structure (300) to rotate through the driving output shaft (410).

10. The motor-operated globe valve of claim 1, wherein The housing structure has a valve body sealing block (230) inside, a circumferential notch of the valve body sealing block (230) forms the valve port (202), the valve core structure (300) comprises a valve core main body (310), a connecting rod (320) and a valve core sealing block (330) connected in sequence, an end surface of the valve core sealing block (330) is in abutment with an end surface of the valve body sealing block (230), the valve core sealing block (330) has a solid structure and an avoiding notch in the circumferential direction; wherein the valve port (202) is closed in the case that the solid structure of the valve core sealing block (330) corresponds to the valve port (202), and the valve port (202) is opened in the case that the avoiding notch of the valve core sealing block (330) corresponds to the valve port (202).

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