Underground submersible type electric waterproof and anti-corrosion execution device

Abstract

The invention relates to the technical field of electric execution devices, and discloses an underground submersible type waterproof and anticorrosive electric execution device which comprises a lower shell, a base is arranged in the lower shell, and a first through hole is formed in the base and used for installing a sealed output shaft. The sealing output shaft is sealed through three layers of rubber rings made of different materials, and the upper end of the sealing output shaft extends into the base and is connected with a gear motor transmission mechanism. And the lower end of the sealing output shaft extends into the mechanical seal and is connected with an external operating mechanism. The base is in bolted connection with the inner shell, and the inner shell covers the gear motor transmission mechanism. And spraying a waterproof and anticorrosive material on the surface, and filling the unoccupied part with a sealant. And the lower shell and the upper shell are in bolted connection to form a complete outer shell. And spraying a waterproof and anticorrosive material on the surface. Multiple layers of different materials are adopted for sealing, and a double-shell structure is adopted. The waterproof and anti-corrosion grade is improved, and the reliability of system operation is improved.

Description

Technical Field

[0001] The present application relates to the technical field of transmission shafts, and in particular to a multi-sealed transmission shaft. Background Art

[0002] In recent years, with the continuous progress in the field of water conservancy and agriculture, intelligent irrigation technology has been widely promoted and applied. As an important part of the system, electric actuators play an indispensable role in ensuring the stable operation of water conservancy facilities and agricultural irrigation systems. These devices need to be underwater or buried underground for a long time to adapt to their specific application scenarios. However, there is still a lack of electric actuators designed specifically for underwater and underground application scenarios on the market. Such products should meet the following high standards: Excellent waterproof performance, the device must meet the IP68 test under 1 MPa water pressure for 72 hours without water ingress.

[0003] Excellent anti-corrosion ability: the device must have good anti-corrosion performance and the inside of the device will not be corroded within five years.

[0004] Reasonable structural design: the design of the device should minimize the number of through-connections and be able to pass the waterproof test smoothly under pressure.

[0005] In summary, the present invention proposes a new design scheme for an underground waterproof and anti-corrosion electric actuator, aiming to improve its waterproof and anti-corrosion level, simplify the installation process, and improve the reliability of system operation. Summary of the invention

[0006] The present invention provides the following technical solution: an electric actuator, comprising a lower housing, a base is provided inside the lower housing, a first through hole is provided inside the base, and a sealed output shaft is installed. The upper end of the sealed output shaft extends into the base and is connected to the gear motor transmission mechanism. The lower end of the sealed output shaft extends into the mechanical seal and is connected to the external operating mechanism. An inner housing is provided above the base, and the inner housing covers the gear motor transmission mechanism. The lower housing is bolted to the upper housing to form a complete outer housing.

[0007] The inner end of the base is provided with a first through hole for connecting the sealed output shaft.

[0008] The seal output shaft body is provided with a third seal groove, a fourth seal groove and a fifth seal groove from bottom to top. A polyurethane seal ring is provided inside the third seal groove, a fluororubber seal ring is provided inside the fourth seal groove, and a silicone rubber seal ring is provided inside the fifth seal groove.

[0009] The sealed output shaft and the first through hole of the lower shell are squeezed so that the polyurethane sealing ring, the fluororubber sealing ring and the silicone rubber sealing ring can seal the connection between the first through hole and the sealed output shaft.

[0010] A mechanical seal is arranged at the end of the sealing output shaft to achieve a multi-layer composite sealing effect.

[0011] A semicircular groove is arranged at the left front of the base, and three non-through threaded holes are arranged at the front and rear sides of the base respectively.

[0012] A gear motor transmission mechanism is installed in the base, and the gear motor transmission mechanism is covered by an inner shell.

[0013] The front and rear sides of the inner shell are respectively provided with three through connection holes, and the connection holes are bolt-connected with the threaded holes of the lower shell base, and a first irregular sealing gasket is provided at the connection between the inner shell and the base.

[0014] The lower shell surface is provided with a second through hole, the power signal line passes through the second through hole, the upper and lower ends of the second through hole are provided with threads, and the threads are consistent in size with the locking nut. The upper end of the second through hole is connected to the inner locking nut, and the lower end of the second through hole is connected to the outer locking nut, so as to achieve double sealing of the power signal line.

[0015] The contact surface between the upper shell and the second irregular sealing gasket is provided with a second sealing groove, and the second sealing groove is connected to the convex arc surface on the second irregular sealing gasket.

[0016] The contact surface between the lower shell and the second irregular sealing gasket is provided with a first sealing groove, and the first sealing groove is connected to the lower convex arc surface of the second irregular sealing gasket. The upper shell has eight non-through threaded holes around it, and the lower shell has eight through holes around it. The non-through threaded holes of the upper shell are connected with the through holes of the lower shell by bolts.

[0017] The inner shell and the base form an extrusion on the first irregular sealing gasket, so that the first irregular sealing gasket seals the connection between the inner shell and the base, and the semicircular groove of the base and the inner shell form an extrusion on the raised part of the first irregular sealing gasket and the power signal line, so that the first irregular sealing gasket seals the connection between the semicircular groove of the base and the power signal line and the inner shell.

[0018] The surface of the connection between the inner shell and the base of the lower shell is sprayed with silicone rubber to achieve an anti-corrosion and isolation effect. After it solidifies, polyurethane is sprayed on the surface to achieve a curing and protective effect. After it solidifies, polyurea is sprayed on the surface to achieve a waterproof effect. After it solidifies, the remaining part is filled with sealant to achieve a multi-layer waterproof and anti-corrosion effect for the inner shell and the lower shell.

[0019] The upper shell and the lower shell form an extrusion on the second irregular sealing gasket, so that the second irregular sealing gasket seals the connection between the upper shell and the lower shell.

[0020] The surface of the integral outer shell composed of the upper shell and the lower shell is sprayed with silicone rubber. After it solidifies, polyurethane is sprayed. After it solidifies, polyurea is sprayed. After it solidifies, asphalt is sprayed on the surface. This achieves waterproof, moisture-proof and corrosion-resistant effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of an execution device provided in an embodiment of the present invention;

[0022] Figure 2 An introduction diagram of an upper locking nut component of an actuator provided in an embodiment of the present invention;

[0023] Figure 3 An introduction diagram of a lower locking nut, a transmission shaft and a mechanical seal component of an actuator provided in an embodiment of the present invention;

[0024] Figure 4 An introduction diagram of the upper housing component of the actuator provided by an embodiment of the present invention;

[0025] Figure 5 A diagram for introducing the glue filling of the lower housing and inner housing components of the actuator provided by the embodiment of the present invention;

[0026] Figure 6 An introduction diagram of the lower housing base component of the actuator provided by an embodiment of the present invention;

[0027] Figure 7 An introduction diagram of a first irregular sealing gasket component of an actuator provided by an embodiment of the present invention;

[0028] Figure 8 An introduction diagram of a second irregular sealing gasket component of an actuator provided by an embodiment of the present invention;

[0029] Fig. 9 A cross-sectional view of a second irregular sealing gasket of an actuator provided by an embodiment of the present invention;

[0030] Fig.10 An introduction diagram of a sealed output shaft of an actuator provided in an embodiment of the present invention;

[0031] Fig.11 A front view of a sealed output shaft of an actuator provided by an embodiment of the present invention;

[0032] In the figure: 1, sealed output shaft; 2, gear motor transmission mechanism; 3, first irregular sealing gasket; 4, inner shell; 5, second irregular sealing gasket; 7, mechanical seal; 8, inner locking nut; 9, semicircular groove of base; 10, upper convex arc surface; 11, lower shell; 12, sealant; 13, upper shell; 14, first sealing groove; 15, second sealing groove; 17, base; 18, outer locking nut; 20, lower convex arc surface; 21, second through hole; 22, first through hole; 23, third sealing groove; 24, fourth sealing groove; 25, fifth sealing groove; 26, polyurethane sealing ring; 27, fluororubber sealing ring; 28, silicone rubber sealing ring; DETAILED DESCRIPTION

[0033] Figure 1 A schematic diagram of the three-dimensional structure of an actuator provided in an embodiment of the present invention, an electric actuator, comprising a lower shell 11, a base 17 is provided inside the lower shell 11, a first through hole 22 is provided inside the base 17 to connect a sealed output shaft 1, the upper end of the sealed output shaft 1 extends to the inside of the base 17 and is connected to the gear motor transmission mechanism, and the lower end of the sealed output shaft 1 extends to the inside of the mechanical seal 7 and is connected to an external operating mechanism.

[0034] The seal output shaft body is provided with a third seal groove 23, a fourth seal groove 24, and a fifth seal groove 25 from bottom to top. A polyurethane seal ring 26 is provided inside the third seal groove 23, a fluororubber seal ring 27 is provided inside the fourth seal groove 24, and a silicone rubber seal ring 28 is provided inside the fifth seal groove 25.

[0035] The sealed output shaft 1 is extruded with the first through hole 22, and the polyurethane sealing ring 26 in the third sealing groove 23, the fluororubber sealing ring 27 in the fourth sealing groove 24, and the silicone rubber sealing ring 28 in the fifth sealing groove 25 are extruded, so that the polyurethane sealing ring 26, the fluororubber sealing ring 27, and the silicone rubber sealing ring 28 seal the connection between the first through hole 22 and the sealed output shaft 1. A mechanical seal 7 is provided at the end of the sealed output shaft 1, so that the sealed shaft achieves a multi-layer sealing effect.

[0036] The inner end of the base 17 is provided with a first through hole 22 to connect the sealed output shaft 1. A semicircular groove is provided at the left front of the base 17, and three non-through threaded holes are provided at the front and rear of the base 17. A gear motor transmission mechanism 2 is installed in the base 17, and the gear motor transmission mechanism 2 is covered by the inner shell 4.

[0037] The front and rear sides of the 4 inner shells are respectively provided with three through connection holes, and the connection holes are bolted to the threaded holes of the 17 bases, and the 17 bases are provided with 3 first irregular sealing gaskets at the connection with the 4 inner shells. The 17 bases and the 4 inner shells form an extrusion on the 3 first irregular sealing gaskets, so that the 3 first irregular sealing gaskets seal the connection between the 17 bases and the 4 inner shells, and the 9 base semicircular grooves and the 4 inner shells form an extrusion on the 3 first irregular sealing gasket convex parts and the power signal line, so that the 3 first irregular sealing gaskets seal the connection between the 9 base semicircular grooves and the power signal line and the 4 inner shells.

[0038] The remaining surface of the connection between the 4 inner shells and the base of the lower shell 17 is sprayed with silicone rubber to achieve an anti-corrosion and isolation effect. After it solidifies, it is sprayed with polyurethane to achieve toughness and structural protection. After it solidifies, it is sprayed with polyurea to achieve a waterproof effect. After it solidifies, the remaining part is filled with sealant to achieve a multi-layer waterproof and anti-corrosion effect for the 4 inner shells and the lower shell 11.

[0039] The surface of the lower shell 11 is provided with a second through hole 21, through which the power signal line passes, and the upper and lower ends of the second through hole 21 are provided with threads, and the threads are consistent in size with the inner locking nut 8 and the outer locking nut 18. The lower end of the second through hole 21 is connected to the outer locking nut 18, and the upper end of the second through hole 21 is connected to the inner locking nut 8, so as to achieve double sealing of the power signal line.

[0040] The contact surface between the lower shell 11 and the second irregular sealing gasket 5 is provided with a first sealing groove 14, and the first sealing groove 14 is connected to the lower convex arc surface of the second irregular sealing gasket 20. The contact surface between the upper shell 13 and the second irregular sealing gasket 5 is provided with a second sealing groove 15, and the second sealing groove 15 is connected to the upper convex arc surface of the second irregular sealing gasket 10.

[0041] The upper shell 13 has eight non-through threaded holes around it, and the lower shell 11 has eight through holes around it. The non-through threaded holes of the upper shell 13 are bolted to the through holes of the lower shell 11. The upper shell 13 and the lower shell 11 squeeze the second irregular sealing gasket 5, so that the second irregular sealing gasket 5 seals the connection between the upper shell 13 and the lower shell 11.

[0042] The outer surface of the upper shell 13 and the lower shell 11 is sprayed with silicone rubber. After it solidifies, it is sprayed with polyurethane. After it solidifies, it is sprayed with polyurea. After it solidifies, it is sprayed with asphalt on the surface to prevent moisture, dust and corrosion.

Claims

1. Three layers of sealing rings of different materials are arranged between the first through hole of the lower shell and the sealed output shaft, a mechanical seal is arranged at the end of the sealed output shaft, a first irregular sealing gasket is arranged at the connection between the base of the lower shell and the inner shell, and silicone, polyurethane, polyurea, and sealant are sprayed between the lower shell and the inner shell. A second irregular sealing gasket is arranged at the connection between the upper shell and the lower shell, threads are arranged at the upper and lower ends of the second through hole of the lower shell, and locking nuts are arranged at the upper and lower ends of the second through hole. The surfaces of the upper shell and the lower shell are sprayed with silicone, polyurethane, polyurea, and asphalt.

2. The waterproof and anti-corrosion actuator according to claim 1 is characterized in that: The waterproof and anti-corrosion actuator adopts a double shell design, which plays a double protection role for the internal gear motor transmission device.

3. According to claim 1, the waterproof and anti-corrosion actuator is characterized in that locking nuts are provided at both upper and lower ends of the second through hole, which have a double sealing effect on the power signal line.

4. The waterproof and anti-corrosion execution device according to claim 1 is characterized in that three layers of sealing rings made of different materials are arranged between the first through hole of the lower shell and the sealed output shaft, and the first through hole of the lower shell and the sealed output shaft squeeze the three layers of sealing rings made of different materials, so that the three layers of sealing rings made of different materials implement multi-layer sealing on the connection between the first through hole of the lower shell and the sealed output shaft.

5. A mechanical seal is provided at the end of the sealed output shaft to achieve a multi-layer sealing effect.

6. The waterproof and anti-corrosion actuator according to claim 1 is characterized in that: A first irregular sealing gasket is provided between the lower shell base and the inner shell, and the lower shell base and the inner shell form an extrusion on the first irregular sealing gasket, so that the first irregular sealing gasket seals the connection between the lower shell base and the inner shell. The semicircular groove of the base and the inner shell form an extrusion on the raised part of the first irregular sealing gasket and the power signal line, so that the first irregular sealing gasket seals the connection between the semicircular groove of the base and the power signal line and the inner shell.

7. The waterproof and anti-corrosion actuator according to claim 1 is characterized in that: The surface portion where the inner shell is connected to the base of the lower shell is sprayed with silicone, polyurethane, or polyurea, and then the remaining portion inside is filled with sealant.

8. According to claim 1, the waterproof and anti-corrosion execution device is characterized in that the contact surface between the upper shell and the second irregular sealing gasket is provided with a second sealing groove, the contact surface between the lower shell and the second irregular sealing gasket is provided with a first sealing groove, and the upper shell and the lower shell form an extrusion on the second irregular sealing gasket so that the second irregular sealing gasket seals the connection between the upper shell and the lower shell.

9. The waterproof and anti-corrosion actuator according to claim 1 is characterized in that: The upper shell and the lower shell are sprayed with silicone, polyurethane and polyurea as a whole to achieve moisture-proof, dust-proof and corrosion-resistant effects; and asphalt is sprayed on the upper shell and the lower shell to achieve multi-layer waterproof and anti-corrosion effects.

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