Sealing structure for electric valve

Abstract

The utility model provides a sealing structure for an electrically operated valve, which relates to the field of electrically operated valves, and comprises a valve body component, a sealing component and an impurity filtering component are respectively arranged in an inner cavity of the valve body component, the sealing component comprises a sealing sleeve, the valve body component comprises a valve seat, an inner cavity of the valve seat is movably connected with a valve plate, and the valve plate is provided with an opening. A sealing block is arranged at the top of the valve plate, and a ring piece is arranged in an inner cavity of the sealing sleeve. The connecting ring is matched with the impurity filtering net to intercept impurities in conveyed liquid, contact between the impurities and the sealing sleeve can be effectively relieved, the sealing sleeve is abraded, meanwhile, the ring piece is matched with the supporting block to support the sealing sleeve, the situation that the sealing sleeve is abraded and a gap is generated between the sealing sleeve and the inner wall of the valve seat can be effectively prevented, and the service life of the valve seat is prolonged. The upper end of the valve plate can be sealed through the sealing block, reset force of the supporting block can be transmitted to the ring piece, the ring piece applies force to the sealing sleeve, then the sealing sleeve can make close contact with the inner wall of the valve seat all the time, and the sealing performance of the sealing sleeve is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric valve field, concretely speaking, it is a kind of sealing structure for electric valve. BACKGROUND

[0002] Electric valve is one of the key parts in its internal sealing element in the use process, determines the sealing property, durability and reliability of valve, electric valve is usually composed of electric actuator and valve body part, and sealing element mainly refers to the sealing design between valve body and valve core.

[0003] Electric valve sealing element is used with valve core plate, and the valve core plate is driven to move by power element, so that the valve core plate drives sealing element to block valve body, so that sealing element contacts with inner wall of valve body, to realize the blocking operation of liquid, ensure the sealing property of blocking, prevent liquid overflow;However, the sealing element of electric valve in the prior art is used, since impurities exist in the transported liquid, and the impurities contact the sealing element when the liquid is transported or blocked, friction occurs, which can cause the sealing element to wear, and can cause the sealing element to contact the inner wall of the valve body, thereby reducing the sealing quality of the sealing element.

[0004] Therefore, the utility model provides a sealing structure for electric valve to solve the above problems. INVENTION CONTENTS

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A sealing structure for electric valve, comprising a valve body assembly, the inner cavity of the valve body assembly is respectively provided with a sealing assembly and a impurity filtering assembly, the sealing assembly comprises a sealing sleeve, and the valve body assembly comprises a valve seat, the inner cavity of the valve seat is movably connected with a valve plate, and the top of the valve plate is provided with a sealing block, the inner cavity of the sealing sleeve is provided with a ring piece, one side of the ring piece is fixedly connected with a support block, the end of the support block away from the ring piece contacts with the inner wall of the sealing sleeve, the impurity filtering assembly comprises a connecting ring, and the inner cavity of the connecting ring is fixedly connected with a impurity filtering net.

[0007] Further, in the utility model, the top of the valve seat is provided with a driving element, and the output end of the driving element is drivingly connected with a valve rod, the valve rod penetrates the valve seat and the sealing block and extends to the inner cavity of the valve plate, and is connected with the valve plate by bolt, the inner wall of the sealing block contacts with the valve rod.

[0008] Further, in the utility model, the two ends of the valve seat are fixedly connected with connecting flanges, the side of the connecting flange is provided with mounting hole, and the side of the connecting flange is fixedly connected with sealing pad.

[0009] Further, in the utility model, the connecting ring is located at both sides of the inner cavity of the valve seat and is screwed with the inner cavity of the valve seat, one side of the connecting ring is fixedly connected with a connecting plate, and one side of the connecting plate is fixedly connected with a connecting knob.

[0010] Further, in the utility model, the surface of the valve plate is provided with an annular groove, the sealing sleeve is located in the inner cavity of the valve plate and is movably connected with the inner cavity of the valve plate, and both sides of the sealing block are fixedly connected with the sealing sleeve.

[0011] Beneficial effects, the utility model has following beneficial effects:

[0012] The utility model discloses a connecting ring cooperates with filter screen and can intercept the impurity in the conveying liquid, can effectively relieve the impurity and the contact of sealing sleeve, makes the sealing sleeve appear the wear condition, and simultaneously through the ring piece cooperation support block can support the sealing sleeve, can effectively prevent the sealing sleeve wear and tear and the crack condition of valve seat inner wall, through the sealing block can seal the valve plate upper end, through the reset force of support block can be transferred to the ring piece, makes the ring piece exert force to the sealing sleeve, and then can make the sealing sleeve always and valve seat inner wall closely contact, effectively ensures its sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure schematic drawing of the utility model;

[0014] Figure 2 It is the structure schematic drawing of the utility model drive piece and valve rod separation state and valve plate and sealing sleeve connection state;

[0015] Figure 3 It is the valve plate and valve rod connection structure schematic drawing of the utility model;

[0016] Figure 4 It is the sealing sleeve, ring piece and sealing block connection structure schematic drawing of the utility model.

[0017] In the drawing:

[0018] 1, valve body assembly;11, valve seat;111, connecting flange;112, sealing gasket;12, drive piece;13, valve rod;14, valve plate;141, annular groove;2, sealing assembly;21, sealing sleeve;22, sealing block;23, ring piece;24, support block;3, filter assembly;31, connecting ring;32, filter screen;33, connecting plate;34, connecting knob. DETAILED DESCRIPTION

[0019] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0020] Example 1

[0021] like Figures 1-4 As shown, this is the first embodiment of the present invention. This embodiment provides a sealing structure for an electric valve, including a valve body assembly 1. The inner cavity of the valve body assembly 1 is respectively provided with a sealing assembly 2 and a filter assembly 3. The sealing assembly 2 includes a sealing sleeve 21, and the valve body assembly 1 includes a valve seat 11. The inner cavity of the valve seat 11 is movably connected to a valve plate 14, and a sealing block 22 is provided on the top of the valve plate 14. The inner cavity of the sealing sleeve 21 is provided with an annular piece 23, and a support block 24 is fixedly connected to one side of the annular piece 23. The end of the support block 24 away from the annular piece 23 contacts the inner wall of the sealing sleeve 21. The filter assembly 3 includes a connecting ring 31, and a filter screen 32 is fixedly connected to the inner cavity of the connecting ring 31.

[0022] like Figures 1-4 As shown, when liquid enters the valve seat 11, the connecting ring 31 and the filter screen 32 are located on both sides of the inner cavity of the valve seat 11. The connecting ring 31, together with the filter screen 32, can intercept impurities in the conveyed liquid, effectively reducing the contact between impurities and the sealing sleeve 21 and preventing friction between impurities and the sealing sleeve 21, thus preventing wear of the sealing sleeve 21. At the same time, the sealing sleeve 21, together with the valve plate 14, can realize the opening and closing operation inside the valve seat 11. The ring plate 23 and the support block 24 can support the sealing sleeve 21, effectively preventing wear and deformation of the sealing sleeve 21 and the gap between it and the inner wall of the valve seat 11. The sealing block 22 can seal the upper end of the valve plate 14, thus ensuring the overall sealing. The restoring force of the support block 24 can be transmitted to the ring plate 23, so that the ring plate 23 applies force to the sealing sleeve 21, thus keeping the sealing sleeve 21 in a taut state at all times. The sealing sleeve 21 will be in close contact with the inner wall of the valve seat 11, effectively ensuring its sealing performance.

[0023] Example 2

[0024] Reference Figure 1 and 2 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0025] In this embodiment, the top of the valve seat 11 is provided with a driving member 12, and the output end of the driving member 12 is drivingly connected with a valve rod 13, the valve rod 13 penetrates the valve seat 11 and the sealing block 22 and extends to the inner cavity of the valve plate 14, and is connected with the valve plate 14 through bolts, and the inner wall of the sealing block 22 is in contact with the valve rod 13.

[0026] Both ends of the valve seat 11 are fixedly connected with a connecting flange 111, one side of the connecting flange 111 is provided with a mounting hole, and one side of the connecting flange 111 is fixedly connected with a sealing gasket 112.

[0027] The sealing gasket 112, the sealing sleeve 21 and the sealing block 22 are all made of rubber material, the supporting block 24 is made of polyurethane material, and the driving member 12 is an electric motor.

[0028] As shown in Figure 1 and 2 , the valve rod 13 is driven to rotate by the driving member 12, which facilitates the valve rod 13 to drive the valve plate 14 and the sealing sleeve 21 to perform on-off operation on the valve seat 11, the sealing block 22 is in contact with the valve rod 13, thereby ensuring the sealing property, preventing liquid from leaking through the gap, the connecting flange 111 cooperates with the mounting hole, facilitating the valve seat 11 to be connected with the external pipeline, facilitating the liquid transmission operation in the later period, the sealing gasket 112 can seal the connection between the connecting flange 111 and the external pipeline, ensuring the sealing property of the connection and preventing liquid leakage, the sealing gasket 112, the sealing sleeve 21 and the sealing block 22 are made of rubber material, thereby having good wear resistance, the supporting block 24 is made of polyurethane material, thereby having good elasticity, and can well buffer and support the ring piece 23 and the sealing sleeve 21.

[0029] Embodiment 3

[0030] Referring to Figures 1-3 , this is the third embodiment of the utility model, which is based on the previous two embodiments.

[0031] In this embodiment, the connecting ring 31 is located on both sides of the inner cavity of the valve seat 11 and is threadedly connected with the inner cavity of the valve seat 11, one side of the connecting ring 31 is fixedly connected with a connecting plate 33, and one side of the connecting plate 33 is fixedly connected with a connecting knob 34.

[0032] The surface of the valve plate 14 is provided with an annular groove 141, the sealing sleeve 21 is located in the inner cavity of the valve plate 14 and is movably connected with the inner cavity of the valve plate 14, and the sealing block 22 is fixedly connected with the sealing sleeve 21 on both sides.

[0033] As shown in Figures 1-3As shown, the connecting ring 31 is threadedly connected between the valve seat 11 and the connecting knob 34, and the connecting knob 34 transmits force to the connecting plate 33 and the connecting ring 31, and the connecting ring 31 is continuously rotated, so that the connecting ring 31 can gradually extend or move out of the inner cavity of the valve seat 11, thereby facilitating the disassembly and assembly of the connecting ring 31 and the filter screen 32, and the filter screen 32 can be cleaned or replaced. The sealing sleeve 21 is located in the inner cavity of the annular groove 141, and the annular groove 141 can limit the position of the sealing sleeve 21, and facilitate the assembly or disassembly of the sealing sleeve 21.

[0034] In use, first, the valve rod 13 is driven by the driving member 12 to rotate forward, so that the valve rod 13 drives the valve plate 14 and the sealing sleeve 21 to rotate, and the sealing sleeve 21 and the valve plate 14 are parallel to the internal axis of the valve seat 11, thereby facilitating the delivery of the liquid through the valve seat 11. During the delivery of the liquid, the connecting ring 31 and the filter screen 32 are arranged on both sides of the inner cavity of the valve seat 11, and the connecting ring 31 cooperates with the filter screen 32 to intercept impurities in the delivered liquid, thereby effectively preventing the impurities from contacting the sealing sleeve 21 and preventing the impurities from rubbing against the sealing sleeve 21, so as to prevent the sealing sleeve 21 from being worn. Conversely, the valve rod 13 is driven by the driving member 12 to rotate reversely, so that the valve rod 13 drives the valve plate 14 and the sealing sleeve 21 to rotate, and the sealing sleeve 21 and the valve plate 14 are perpendicular to the internal axis of the valve seat 11, thereby achieving the blocking operation of the liquid. During the blocking process, the restoring force of the supporting block 24 is transmitted to the ring piece 23, so that the ring piece 23 applies force to the sealing sleeve 21, and the sealing sleeve 21 is always in a taut state, and the sealing sleeve 21 is in close contact with the inner wall of the valve seat 11. The ring piece 23 and the supporting block 24 support the sealing sleeve 21, which can effectively prevent the sealing sleeve 21 from being worn and deformed and from generating gaps with the inner wall of the valve seat 11. The sealing block 22 is in contact with the valve rod 13, thereby sealing the gap between the valve rod 13 and the valve seat 11, and the sealing block 22 is connected with the sealing sleeve 21, thereby achieving the sealing of the upper end of the inner cavity of the valve seat 11 and the upper end of the valve seat 11, and effectively ensuring the sealing performance.

[0035] The standard parts used in the present application can be purchased from the market, and can be customized according to the description and drawings. The specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art. The mechanical parts and equipment adopt conventional types in the prior art. The control mode is automatic control by a controller. The control circuit of the controller can be realized by simple programming by a person skilled in the art, which belongs to the common knowledge in the art. The present application is mainly used to protect mechanical devices, so the control mode and circuit connection will not be explained in detail.

[0036] Although the utility model has disclosed as above with preferable embodiments, it is not used to limit the utility model. Those skilled in the art to which the utility model belongs can make various changes and decorations without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model is accurate according to the definition of the claims.

Claims

1. A sealing structure for an electric valve, comprising a valve body assembly (1), characterized in that: The valve body assembly (1) is provided with a sealing assembly (2) and a filter assembly (3) in its inner cavity. The sealing assembly (2) includes a sealing sleeve (21), and the valve body assembly (1) includes a valve seat (11). The valve seat (11) is movably connected to a valve plate (14), and a sealing block (22) is provided on the top of the valve plate (14). The sealing sleeve (21) is provided with an annular piece (23) in its inner cavity, and a support block (24) is fixedly connected to one side of the annular piece (23). The end of the support block (24) away from the annular piece (23) is in contact with the inner wall of the sealing sleeve (21). The filter assembly (3) includes a connecting ring (31), and a filter screen (32) is fixedly connected to the inner cavity of the connecting ring (31).

2. The sealing structure for an electric valve as described in claim 1, characterized in that: The valve seat (11) is provided with a drive member (12) at the top, and the output end of the drive member (12) is connected to a valve stem (13). The valve stem (13) passes through the valve seat (11) and the sealing block (22) and extends to the inner cavity of the valve plate (14), and is connected to the valve plate (14) by bolts. The inner wall of the sealing block (22) is in contact with the valve stem (13).

3. The sealing structure for an electric valve as described in claim 1, characterized in that: Both ends of the valve seat (11) are fixedly connected to a connecting flange (111). A mounting hole is provided on one side of the connecting flange (111), and a sealing gasket (112) is fixedly connected to one side of the connecting flange (111).

4. The sealing structure for an electric valve as described in claim 1, characterized in that: The connecting ring (31) is located on both sides of the inner cavity of the valve seat (11) and is threadedly connected to the inner cavity of the valve seat (11). A connecting plate (33) is fixedly connected to one side of the connecting ring (31), and a connecting button (34) is fixedly connected to one side of the connecting plate (33).

5. The sealing structure for an electric valve as described in claim 1, characterized in that: The valve plate (14) has an annular groove (141) on its surface. The sealing sleeve (21) is located in the inner cavity of the valve plate (14) and is movably connected to the inner cavity of the valve plate (14). Both sides of the sealing block (22) are fixedly connected to the sealing sleeve (21).

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