Sealing gasket, junction box and pump

Abstract

The utility model relates to the technical field of sealing, in particular to a sealing gasket, a junction box and a pump. The first sealing ring and the second sealing ring are constructed into an integrated part; in the axial direction of the sealing gasket, the first upper surface of the first sealing ring is located above the second upper surface of the second sealing ring, and the first lower surface of the first sealing ring is located below the second lower surface of the second sealing ring. In the radial direction of the sealing gasket, the first outer circumferential face of the first sealing ring is located on the inner side of the second outer circumferential face of the second sealing ring, and the first inner circumferential face of the first sealing ring is located on the inner side of the second inner circumferential face of the second sealing ring. According to the sealing gasket, the first sealing ring and the second sealing ring can seal two different positions correspondingly, double sealing is achieved, and compared with single-layer sealing in the prior art, the sealing effect can be improved.

Description

Technical Field

[0001] This application relates to the field of sealing technology, and particularly to sealing gaskets, junction boxes, and pumps. Background Art

[0002] A pump includes a motor and a junction box mounted on the motor. The junction box includes a box base, a box cover, and a motor drive board. The motor drive board is disposed in a chamber defined by the box base and the box cover. To ensure the normal operation of the motor drive board, the junction box needs to have good sealing performance. For this purpose, a sealing ring, such as an O-ring, is provided between the box base and the box cover.

[0003] However, the sealing effect of the sealing ring in the related art is not good. Summary of the Utility Model

[0004] Embodiments of this application provide a sealing gasket, a junction box, and a pump to improve the sealing effect.

[0005] In a first aspect, the sealing gasket provided by an embodiment of this application includes:

[0006] A first sealing ring;

[0007] A second sealing ring, where the first sealing ring and the second sealing ring are configured as an integral part;

[0008] In the axial direction of the sealing gasket, a first upper surface of the first sealing ring is located above a second upper surface of the second sealing ring, and a first lower surface of the first sealing ring is located below a second lower surface of the second sealing ring;

[0009] In the radial direction of the sealing gasket, a first outer peripheral surface of the first sealing ring is located inside a second outer peripheral surface of the second sealing ring, and a first inner peripheral surface of the first sealing ring is located inside a second inner peripheral surface of the second sealing ring.

[0010] In a second aspect, the junction box provided by an embodiment of this application includes:

[0011] A box base having a first annular protrusion, and a lower mounting groove is formed on an outer peripheral side of the first annular protrusion;

[0012] A box cover having a second annular protrusion, and an upper mounting groove is formed on an inner peripheral side of the second annular protrusion; and

[0013] The sealing gasket as described above,

[0014] wherein the first sealing ring is located in the upper mounting groove, the first upper surface abuts against a bottom surface of the upper mounting groove, and the first lower surface abuts against an upper surface of the first annular protrusion;

[0015] Wherein, the second sealing ring is located in the lower mounting groove, the lower surface of the second sealing ring abuts against the bottom surface of the lower mounting groove, and the upper surface of the second sealing ring abuts against the lower surface of the second annular protrusion.

[0016] Thirdly, the pump provided by the embodiment of the present application includes:

[0017] A pump body;

[0018] An electric motor, the electric motor is connected to the pump body; and

[0019] The junction box as described above, the junction box is connected to the electric motor.

[0020] Compared with the prior art, the beneficial effects of the embodiment of the present application include:

[0021] Axially on the sealing gasket, the first sealing ring and the second sealing ring are displaced from each other, and radially on the sealing gasket, the first sealing ring and the second sealing ring are also displaced from each other, so that the first sealing ring and the second sealing ring can respectively seal two different positions, achieving double sealing, and improving the sealing effect compared with the single-layer sealing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shows an exploded view of the junction box of the embodiment of the present application.

[0023] Figure 2 Shows a partial cross-sectional view of the junction box of the embodiment of the present application.

[0024] Figure 3 Shows a schematic view of the lower part of the sealing gasket of the embodiment of the present application.

[0025] Figure 4 Shows a partial cross-sectional view of the sealing gasket of the embodiment of the present application.

[0026] Figure 5 Shows a partial schematic view of the sealing gasket of the embodiment of the present application.

[0027] REFERENCE SIGNS:

[0028] 1, box base; 11, first side wall; 12, first annular protrusion; 13, lower mounting groove; 14, first connection hole; 15, hollow frustum;

[0029] 2, box cover; 21, second side wall; 22, second annular protrusion; 23, upper mounting groove; 24, second connection hole;

[0030] 3. Sealing gasket; 31. First sealing ring; 311. First upper surface; 312. First lower surface; 313. First outer peripheral surface; 314. First inner peripheral surface; 315. First rib; 316. Third rib; 32. Second sealing ring; 321. Second upper surface; 322. Second lower surface; 323. Second outer peripheral surface; 324. Second inner peripheral surface; 325. Second rib; 33. Connecting part; 34. Inner peripheral sealing groove; 35. Outer peripheral sealing groove; 36. Third connecting hole. Detailed implementation manners

[0031] The technical solutions of the present application will be further described below in conjunction with the accompanying drawings and through specific implementation manners. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the sake of description, only the parts related to the present application are shown in the drawings, rather than all of them.

[0032] In the present application, some orientation terms are defined. Without contrary explanations, the orientation terms such as "upper", "lower", "left", "right", "inner", and "outer" are used for the convenience of understanding, and thus do not constitute a limitation on the protection scope of the present application.

[0033] In the present application, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0034] In the description of the present application, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] A pump is a mechanical device used for transporting liquids or increasing the pressure of liquids.

[0036] Pumps can be divided into centrifugal pumps, axial flow pumps, etc.

[0037] The embodiment of the present application takes a centrifugal pump as an example. The centrifugal pump includes a pump body (not shown), a motor (not shown), and a junction box. The motor is connected to the pump body and is used to drive the pump body to operate. For example, the motor shaft of the motor is fixedly connected to the impeller in the pump body, so that the motor drives the impeller to rotate in the pump body to achieve the transportation or pressurization of the liquid. The junction box is connected to the motor and is used to control the operation of the motor. For example, a motor drive board is provided in the junction box, and a control program is stored in the motor drive board, and the control program controls the motor to operate according to a corresponding strategy.

[0038] It should be noted that the control program belongs to the prior art, and the embodiment of the present application does not involve the improvement of the control program.

[0039] Figure 1 The exploded view of the junction box according to the embodiment of the present application is shown. As Figure 1 shown, the junction box includes a box base 1, a box cover 2, and a sealing gasket 3.

[0040] The box base 1 can be a separate part and is installed on the housing of the motor through fasteners such as screws. In addition, in an embodiment not shown, the box base 1 can also be integrated into the housing of the motor, so that the box base 1 and the housing of the motor are the same part.

[0041] The box cover 2 can be covered on the box base 1, so as to form a chamber between the box cover 2 and the box base 1, and the motor drive board is located in the chamber. The box cover 2 and the box base 1 can be connected through fasteners such as screws. A wiring hole (not shown) can be opened on the box cover 2 so that an external power cord or signal line can be connected to the box cover 2, and then the motor can be powered or its operation can be controlled.

[0042] The sealing gasket 3 can be installed at the connection between the box base 1 and the box cover 2 and is used to seal the junction box, for example, to prevent external liquid from entering the interior of the junction box.

[0043] As Figure 1 shown, the box base 1 includes a first side wall 11 extending circumferentially, a first annular protrusion 12 extending circumferentially is provided on the upper surface of the first side wall 11, and a lower mounting groove 13 is formed on the outer peripheral side of the first annular protrusion 12.

[0044] Figure 2 The partial cross-sectional view of the junction box according to the embodiment of the present application is shown. As Figure 2 shown, the upper surface of the first annular protrusion 12 is higher than the bottom surface of the lower mounting groove 13, and the outer peripheral wall of the first annular protrusion 12 serves as one side surface of the lower mounting groove 13 ( Figure 2 the right side in Figure 2 ), and the other side (

[0045] As Figure 2As shown, the lid 2 includes a second sidewall 21 extending circumferentially. The lower surface of the second sidewall 21 is provided with a second annular protrusion 22 extending circumferentially. An upper mounting groove 23 is formed on the inner circumferential side of the second annular protrusion 22. The lower surface of the second annular protrusion 22 is lower than the bottom surface of the upper mounting groove 23, and the inner circumferential wall of the second annular protrusion 22 serves as one side surface of the upper mounting groove 23( Figure 2 the left side in Figure 2 ; the other side (

[0046] As Figure 2 and Figure 3 shown, the sealing gasket 3 includes a first sealing ring 31 and a second sealing ring 32. The shapes of the first sealing ring 31 and the second sealing ring 32 are not limited and can be circular, square, or other geometric shapes.

[0047] As Figure 2 and Figure 3 shown, the first sealing ring 31 and the second sealing ring 32 are configured as an integral part, that is, the first sealing ring 31 and the second sealing ring 32 cannot be disassembled into two independent parts. The first sealing ring 31 and the second sealing ring 32 can be formed as an integral part during manufacturing or after manufacturing. In this embodiment, the first sealing ring 31 and the second sealing ring 32 can be connected through a connecting portion 33, and the connecting portion 33, the first sealing ring 31, and the second sealing ring 32 together form an integral part.

[0048] Figure 4 shows a partial cross-sectional view of the sealing gasket 3 according to an embodiment of the present application. As Figure 4 shown, in the axial direction of the sealing gasket 3, the first upper surface 311 of the first sealing ring 31 is above the second upper surface 321 of the second sealing ring 32, and the first lower surface 312 of the first sealing ring 31 is above the second lower surface 322 of the second sealing ring 32. That is, in the axial direction of the sealing gasket 3, the first sealing ring 31 and the second sealing ring 32 are arranged in a staggered manner.

[0049] As Figure 4 shown, in the radial direction of the sealing gasket 3, the first outer circumferential surface 313 of the first sealing ring 31 is inside the second outer circumferential surface 323 of the second sealing ring 32, and the first inner circumferential surface 314 of the first sealing ring 31 is inside the second inner circumferential surface 324 of the second sealing ring 32. That is, in the radial direction of the sealing gasket 3, the first sealing ring 31 and the second sealing ring 32 are arranged in a staggered manner.

[0050] As Figure 2 and Figure 4 shown, the longitudinal section of the sealing gasket 3 is generally in a "Z" shape.

[0051] As Figure 4As shown, on the inner circumferential side of the sealing gasket 3, the first lower surface 312 of the first sealing ring 31 forms an inner circumferential sealing groove 34 that opens downward. On the outer circumferential side of the sealing gasket 3, the second upper surface 321 of the second sealing ring 32 forms an outer circumferential sealing groove 35 that opens upward.

[0052] As Figure 2 and Figure 3 shown, the sealing gasket 3 of the embodiment of the present application has two upper and lower sealing rings of different sizes. When the sealing gasket 3 is installed between the box base 1 and the box cover 2, it can provide double sealing, thereby improving the sealing effect compared with the single-layer sealing in the prior art. In addition, the upper mounting groove 23, the lower mounting groove 13, the inner circumferential sealing groove 34, and the outer circumferential sealing groove 35 are all semi-open, which is easy to realize the installation between the sealing gasket 3 and the box base 1 and between the sealing gasket 3 and the box cover 2.

[0053] As Figure 2 and Figure 4 shown, when the sealing gasket 3 is installed between the box base 1 and the box cover 2, the first sealing ring 31 is located in the upper mounting groove 23. The first upper surface 311 abuts against the bottom surface of the upper mounting groove 23, and the first lower surface 312 abuts against the upper surface of the first annular protrusion 12. The first sealing ring 31 is squeezed and deformed to seal between the upper surface of the first annular protrusion 12 and the bottom surface of the upper mounting groove 23.

[0054] As Figure 2 and Figure 4 shown, when the sealing gasket 3 is installed between the box base 1 and the box cover 2, the second sealing ring 32 is located in the lower mounting groove 13. The second lower surface 322 abuts against the bottom surface of the lower mounting groove 13, and the second upper surface 321 abuts against the lower surface of the second annular protrusion 22. The second sealing ring 32 is squeezed and deformed to seal between the lower surface of the second annular protrusion 22 and the bottom surface of the lower mounting groove 13.

[0055] As Figure 1 and Figure 2 shown, the box base 1 has a first connection hole 14, the box cover 2 has a second connection hole 24, and the sealing gasket 3 has a third connection hole 36. The first connection hole 14, the second connection hole 24, and the third connection hole 36 are arranged corresponding to each other. The screw can pass through the second connection hole 24, the third connection hole 36, and the first connection hole 14 in sequence and then be connected to the housing of the motor.

[0056] As Figure 2 shown, the wall surface at the lower end of the first connection hole 14 abuts against the wall surface at the upper end of the second connection hole 24. Specifically, as Figure 1 and Figure 2As shown, in this embodiment, the first upper surface 311 of the first annular protrusion 12 has a hollow frustum 15 protruding upward. The hollow frustum 15 surrounds the outer periphery of the first connection hole 14, and the upper surface of the hollow frustum 15 abuts against the lower surface of the box cover 2. It should be noted that the hollow frustum 15 can also be provided on the lower surface of the box cover 2.

[0057] Thus, the minimum distance between the box base 1 and the box cover 2 is fixed. When the box cover 2 and the box base 1 are connected by screws, the compression amount of the sealing gasket 3 is fixed, avoiding damage caused by excessive compression of the sealing gasket 3. By adjusting the height of the hollow frustum 15, the compression amount of the sealing gasket 3 can be controlled.

[0058] As Figure 4 and Figure 5 shown, a first rib 315 is provided on the first upper surface 311. The first rib 315 can supplement the compression amount of the sealing gasket 3 and improve the sealing performance. It should be noted that the first rib 315 can also be provided on the first lower surface 312.

[0059] As Figure 4 and Figure 5 shown, a second rib 325 is provided on the second upper surface 321. The second rib 325 can supplement the compression amount of the sealing gasket 3 and improve the sealing performance. It should be noted that the second rib 325 can also be provided on the second lower surface 322.

[0060] As Figure 5 shown, a third rib 316 extending around the third connection hole 36 is provided on the first upper surface 311. The third rib 316 can supplement the compression amount of the sealing gasket 3 and improve the sealing performance. It should be noted that the third rib 316 can also be provided on the first lower surface 312.

[0061] As Figure 5 shown, the third rib 316 can partially coincide with the first rib 315. However, in an embodiment not shown, the third rib 316 can also be separated from the first rib 315.

[0062] The heights of the first rib 315, the second rib 325, and the third rib 316 can be between 0.4 and 0.6 mm. The shapes of the first rib 315, the second rib 325, and the third rib 316 are not limited. For example, they can be triangular.

[0063] It should be noted that although the sealing gasket 3 is applied to the junction box in the embodiments of the present application to seal the connection between the box base 1 and the box cover 2, in an embodiment not shown, the sealing gasket 3 can be applied to similar usage environments, especially in usage scenarios that require waterproofing.

[0064] The foregoing is a description of embodiments of the present application. Through the above description of the disclosed embodiments, those skilled in the art can implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealing gasket, characterized in that, The sealing gasket (3) includes: A first sealing ring (31); A second sealing ring (32), and the first sealing ring (31) and the second sealing ring (32) are configured as an integral part; In the axial direction of the sealing gasket (3), a first upper surface (311) of the first sealing ring (31) is above a second upper surface (321) of the second sealing ring (32), and a first lower surface (312) of the first sealing ring (31) is above a second lower surface (322) of the second sealing ring (32); In the radial direction of the sealing gasket (3), a first outer peripheral surface (313) of the first sealing ring (31) is inside a second outer peripheral surface (323) of the second sealing ring (32), and a first inner peripheral surface (314) of the first sealing ring (31) is inside a second inner peripheral surface (324) of the second sealing ring (32).

2. The sealing gasket according to claim 1, characterized in that The sealing gasket (3) further includes: A connecting portion (33), the connecting portion (33) is connected between the first sealing ring (31) and the second sealing ring (32), and the first sealing ring (31), the second sealing ring (32) and the connecting portion (33) together form an integral part.

3. The sealing gasket according to claim 1, characterized in that On the inner peripheral side of the sealing gasket (3), the first lower surface (312) of the first sealing ring (31) forms an inner peripheral sealing groove (34) opening downward; On the outer peripheral side of the sealing gasket (3), the second upper surface (321) of the second sealing ring (32) forms an outer peripheral sealing groove (35) opening upward.

4. The sealing gasket according to claim 1, characterized in that, A first rib (315) is provided on the first upper surface (311) and / or the first lower surface (312).

5. The sealing gasket according to claim 1, characterized in that, A second rib (325) is provided on the second upper surface (321) and / or the second lower surface (322).

6. Junction box, characterized in that, The junction box includes: A box base (1), the box base (1) has a first annular protrusion (12), and a lower mounting groove (13) is formed on the outer peripheral side of the first annular protrusion (12); A box cover (2), the box cover (2) has a second annular protrusion (22), and an upper mounting groove (23) is formed on the inner peripheral side of the second annular protrusion (22); and The sealing gasket (3) according to any one of claims 1 to 5, wherein, the first sealing ring (31) is located in the upper mounting groove (23), the first upper surface (311) abuts against the groove bottom surface of the upper mounting groove (23), and the first lower surface (312) abuts against the upper surface of the first annular protrusion (12); wherein, the second sealing ring (32) is located in the lower mounting groove (13), the second lower surface (322) abuts against the groove bottom surface of the lower mounting groove (13), and the second upper surface (321) abuts against the lower surface of the second annular protrusion (22).

7. The junction box according to claim 6, characterized in that, The box base (1) has a first connection hole (14), the box cover (2) has a second connection hole (24), and the sealing gasket (3) has a third connection hole (36). The first connection hole (14), the second connection hole (24), and the third connection hole (36) are arranged corresponding to each other.

8. The junction box according to claim 7, characterized in that, The wall surface at the lower end of the first connection hole (14) abuts against the wall surface at the upper end of the second connection hole (24).

9. The junction box according to claim 7, characterized in that, A third rib (316) formed around the third connection hole (36) is provided on the first upper surface (311).

10. A pump, characterized in that, The pump includes: A pump body; A motor, the motor being connected to the pump body; and The junction box according to any one of claims 6 to 9, the junction box being connected to the motor.

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