Sealing component for vacuum wiring

Abstract

The utility model discloses a sealing component for vacuum wiring, which is used for electric connection of electric equipment in a vacuum environment. The sealing component is matched with the conical hole and comprises an electric connection component, an insulator, an installation component and a sealing block. The sealing block is a circular truncated cone. The mounting component comprises a fastening nut and a steel plate, and when the fastening nut is screwed down, the steel plate enables the sealing block to deform and seal. The electric connection part comprises a wire and a wiring end, and the wire penetrates through the sealing block in a sealed and insulated mode and is connected with the wiring end. The wire is insulated from the wall of the container through the insulating layer, the insulator, the insulating plate and the rubber sealing block. The utility model has the advantages of convenient installation and good sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model is applied to the vacuum container sealing field, and specifically relates to a sealing component for providing electrical connection for electrical equipment in a vacuum container. BACKGROUND

[0002] Vacuum is applied to many industrial production devices, such as vacuum smelting furnaces, vacuum drying furnaces and the like, and many electrical equipment is installed in a vacuum environment or in a vacuum container. In order to provide electrical connection for such electrical equipment and ensure the vacuum degree, a sealing component for electrical connection is necessarily required. CN115693265A is a wiring post sealing structure, which comprises a wiring board, a wiring post, and an insulating sealing conversion head. The insulating sealing conversion head is arranged in a sealing through hole of the wiring board, and the wiring post is arranged in a sealing through hole of the insulating sealing conversion head. Rubber sealing pads are arranged between the stopper and the wiring board, between the sealing groove of the conversion head and the wiring board, and between the sealing groove of the wiring post and the insulating sealing conversion head. CN201663511U is a metal sealing ceramic outlet box of an electric locomotive transformer oil pump motor, in which a ceramic insulator is inserted into a wiring hole in a metal bottom plate, and a wiring double-end bolt is inserted into the center of the ceramic insulator. The metal bottom plate and the ceramic insulator, and the ceramic insulator and the wiring bolt are connected into an integral whole through a ceramic insulating material, and are sealed through ceramic metallization treatment to form a rigid whole. The above two patent solutions strengthen sealing and insulation, respectively. CN204156159U is a wiring rack for a high-pressure shielding pump, which solves the problems of poor sealing performance and low pressure bearing of the high-pressure shielding pump wiring rack. CN209088152U is an electric motor wiring post, which solves the problem of moisture-proof sealing power transmission. The above patents only involve the sealing of the wiring board and do not involve the sealing and insulation between the wiring board and the vacuum container. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem of providing a sealing component for vacuum wiring, which provides electrical connection for electrical equipment in a vacuum container and ensures the vacuum degree of the container, is easy to install, and has good sealing performance.

[0004] The technical solution adopted by this utility model is as follows: a sealing component for vacuum wiring, which mates with a conical hole on the wall of a vacuum container, including an electrical connection component, an insulator, a mounting component, and a sealing block. The sealing block is a frustum; the mounting component includes a fastening nut, a screw tube, and a steel plate. The steel plate is welded to one end of the screw tube, and the other end of the screw tube is machined with an external thread, which is threaded to connect the fastening nut; the steel plate is located at the bottom of the frustum of the sealing block, and the externally threaded section of the screw tube extends out of the top of the frustum of the sealing block; the electrical connection component includes a wire and a terminal. The wire is located inside the screw tube, and the terminal is located at both ends of the screw tube; the terminal includes a terminal post and a copper plate. The terminal post is fixed to the outer end of the copper plate, and the inner end of the copper plate is connected to the wire; the electrical connection component is connected to the screw tube through the insulator.

[0005] Furthermore, the copper plate is machined with through holes to facilitate the injection of insulating liquid.

[0006] Furthermore, the inner surface of the screw tube is machined with internal threads or helical grooves to increase sealing and restrict the movement of the insulator.

[0007] Furthermore, the screw tube is extruded through the center of the sealing block, and protrusions or grooves are machined on the contact surface of the steel plate that mates with the sealing block, which together with the elastic deformation of the sealing block increase the sealing performance.

[0008] Alternatively, the mounting components of the vacuum wiring sealing component include a fastening nut, a stud, and a steel plate. The steel plate is welded to the stud and is positioned at the base of the sealing block. The stud seals through the center of the sealing block, and the fastening nut is threaded onto the inner end of the stud. Two fixing nuts are also threaded onto the stud on both sides of the sealing block. The electrical connection component includes a wire, a terminal block, and terminals. The wire has its own insulation layer, passes through the sealing block, and is integrated with the sealing block. Both ends are connected to the terminals. The terminals are fixed to the terminal block, which is secured with fixing nuts.

[0009] Furthermore, the wire is curved to accommodate thermal expansion and contraction.

[0010] Furthermore, the sealing block covers the mounting component, and the two are integrated.

[0011] The beneficial effects of this invention are as follows: This invention uses a sealed and insulated method to pass the wire through the sealing block, achieving electrical connection of the equipment inside the vacuum container while ensuring the vacuum level. This invention can be installed with just one fastening nut, making installation convenient. The sealing pressure applied to the sealing block is the sum of the preload and atmospheric pressure; even if the preload gradually decreases or disappears over time, the sealing block remains sealed under atmospheric pressure. Attached Figure Description

[0012] Figure 1is the structural schematic diagram of example 1;

[0013] Figure 2 is the installation schematic diagram of example 1;

[0014] Figure 3 is the structural schematic diagram of example 2;

[0015] Figure 4 is the structural schematic diagram of example 3;

[0016] Figure 5 is the structural schematic diagram of example 4;

[0017] Figure 6 is the top view schematic diagram of Figure 5 ;

[0018] Wherein: 1 - electrical connection components, 2 - insulator, 3 - mounting components, 4 - sealing block, 5 - wall, 6 - backing plate, 7 - terminal board;

[0019] 11 - terminal post, 12 - copper plate, 13 - through hole, 14 - wire, 15 - terminal nut;

[0020] 31 - fastening nut, 32 - screw pipe, 33 - steel plate, 34 - stud. DETAILED DESCRIPTION

[0021] The circular is easy to process, and the utility model takes the circular sealing component drawing example, but is not limited to the circular. In order to distinguish nut, the following fastening nut is used for the installation of sealing component, fixed nut is used for the fixation of terminal board, and terminal nut is used for the electrical connection of wire or cable. EMBODIMENT

[0022] The sealing component of the embodiment is as shown in the drawing, and includes electrical connection components 1, insulator 2, mounting components 3, sealing block 4 and the like. Figure 1 The sealing block 4 is a circular truncated cone body, the side of the circular truncated cone is a sealing surface, the large plane of the circular truncated cone body is a bottom, and the small plane is a top.

[0023] The mounting components 3 include fastening nut 31, screw pipe 32, steel plate 33 and the like, one end of the screw pipe 32 is welded with the steel plate 33, the other end is processed with external thread, and the thread is connected with the fastening nut 31. The mounting components 3 are covered with the sealing block 4, and the two are integrated. The steel plate 33 is located at the bottom of the sealing block 4, and the external thread section of the screw pipe extends out of the top of the sealing block.

[0024] The electric connection component 1 comprises a wire 14 and two terminals fixedly connected at both ends of the wire. The terminal comprises a terminal post 11 and a copper plate 12, the terminal post 11 is fixed at the outer end of the copper plate 12, and the inner end of the copper plate 12 is connected with the wire 14. The wire 14 is located in the screw pipe 32, and the terminal is located at both ends of the screw pipe. The electric connection component is connected with the screw pipe through the insulator 2.

[0025] The mounting component 3 can be made of low-carbon steel, which has excellent weldability and processing performance. The sealing block 4 is made of elastic rubber material. In order to reduce the resistance, the terminal post, the copper plate and the wire of the electric connection component are made of brass. The insulator 2 can be made of insulating resin. The insulator is formed by pouring the liquid resin into the screw pipe and cooling to room temperature when the temperature of the insulator is about 300℃. In order to facilitate the discharge of gas, a through hole 13 is processed on the copper plate 12. In addition, the resin in the through hole 13 enhances the connection between the copper plate and the resin, and also provides convenience for the connection of the terminal post 11 with the wire or cable and provides torque. After the resin is solidified, the insulation resistance between the electric connection component and the mounting component is detected.

[0026] The inner surface of the screw pipe is processed with internal threads or spiral grooves, and the resin is filled in the internal threads or spiral grooves, which increases the integration of the screw pipe and the insulator, and also increases the sealing ability between the screw pipe and the insulator.

[0027] In this embodiment, the electric connection component is installed as shown in the accompanying drawings. Figure 2 The conical terminal hole is pre-processed on the wall 5 of the vacuum container, the conical surface of the conical hole corresponds to the side surface of the circular truncated cone of the sealing block, and the conical hole is preferably larger at the outer end and smaller at the inner end. The external thread segment of the screw pipe passes through the through hole of the gasket plate 6 and the conical hole, and the screw nut 31 is screwed tightly. The screw pipe 32 and the steel plate 33 are moved inward together, and the sealing block is compressed to cause elastic deformation of the rubber, and the side surface of the circular truncated cone of the sealing block forms a surface seal with the conical surface of the conical hole. After installation, the terminal at the inner and outer ends of the container can be connected with the wire or cable.

[0028] In this embodiment, the conical terminal hole is larger at the outer end and smaller at the inner end, because the container is in a vacuum state, and the atmospheric pressure acts on the bottom of the sealing block, and the pressure difference is beneficial to the sealing of the conical surface of the conical terminal hole. Even if the pre-tightening force of the screw pipe gradually disappears, the atmospheric pressure can also ensure the sealing of the sealing block. The conical terminal hole is larger at the outer end and smaller at the inner end, and the sealing of the side surface of the circular truncated cone of the sealing block requires the pre-tightening force of the screw pipe minus the atmospheric pressure. When the pre-tightening force gradually decreases, the sealing effect of the sealing block gradually deteriorates. Embodiment

[0029] Because of the error in processing, if the taper angle of the taper connecting hole is greatly different from the taper angle of the sealing block, the taper surface of the taper hole and the side surface of the circular truncated cone form a linear seal, and the sealing effect can only rely on the elasticity of the rubber and the pre-tightening force. To avoid the above situation, in the embodiment, the side surface of the circular truncated cone of the sealing block 4 in the embodiment 1 is changed to an arc surface, as shown in the accompanying Figure 3 The circular truncated cone is a geometric body formed by rotating the straight line perpendicular to the hypotenuse of the right trapezoid as the rotation axis, and rotating the remaining sides to form a curved surface. In the embodiment, the straight hypotenuse line is changed to an arc line. As long as the sealing block is elastically deformed, a surface seal is formed, which can greatly widen the taper angle range of the taper connecting hole, and provide convenience for the processing of the taper hole and the installation of the sealing part.

[0030] For the working place with temperature difference, the wire 14 can be made in a curved shape, which is beneficial to thermal expansion and contraction. Although the plasticity of brass is good, the structure is beneficial to improve the safety factor and ensure the safe operation of the electrical equipment in the vacuum container. Embodiment

[0031] The installation part 3 and the sealing block 4 of the embodiment are not covered and integrated, as shown in the accompanying Figure 4 A small hole is processed in the center of the sealing block 4 in advance, and the diameter of the small hole is smaller than the outer diameter of the screw rod pipe. The screw rod pipe is extruded through the small hole. When the external thread passes through the small hole, the inner surface of the small hole is scraped, which is beneficial to enhance the sealing performance of the inner surface of the small hole and the outer surface of the screw rod pipe under the action of the elastic force of the rubber. In order to ensure the contact seal between the bottom of the circular truncated cone and the steel plate, a protrusion or a groove is processed on the contact surface of the steel plate. Figure 4 The accompanying is a schematic view of the installation of the embodiment. The rubber sealing block is elastically deformed under the action of the pre-tightening force, and forms a seal with the protrusion or the groove on the contact surface of the steel plate.

[0032] Figure 2 Only one of the installation methods of the utility model is given, and different installation and sealing methods can also be designed, that is, there are many installation methods of the utility model, such as the small hole size of the taper connecting hole is smaller than the size of the fastening nut, and the gasket can be directly installed without using a gasket, or a gasket and the inner surface of the wall are increased to form a double seal and improve the sealing performance. Embodiment

[0033] The above embodiments are suitable for the electrical connection of high-power equipment in the vacuum container, and only one wire is arranged on each sealing part. For small-power equipment, in order to reduce the number of openings on the wall of the vacuum container, a plurality of wires can be arranged on one sealing part, as shown in the accompanying Figure 5 and the accompanying Figure 6 The sealing part of the embodiment also includes an electrical connection part 1, an insulator 2, an installation part 3 and a sealing block 4. The shape of the sealing block is a circular truncated cone, and the sealing surface is the side surface of the circular truncated cone.

[0034] The screw rod in the mounting component is replaced by a stud 34, and two fixing nuts are added. The stud 34 is sealingly inserted or passes through the center of the sealing block, and the steel plate 33 is located on the bottom of the sealing block and is welded to the stud. The two ends of the stud extend out of the top of the sealing block and the steel plate, respectively, and the fastening nut is threadedly connected to the inner end of the stud. On both sides of the sealing block, two fixing nuts are also threadedly connected. The fastening nut is used to mount and seal the conical wire hole, and the fixing nut is used to fix the wire plate.

[0035] The electrical connection component includes the wires 14, the wire plate 7 and the wire ends. The wires 14 are self-insulated, pass through the sealing block and are integrated with the sealing block, and the two ends are connected to the wire ends. The wire ends are fixed on the wire plate 7 and are threadedly connected to the wire nuts 15, which are used for electrical connection of the wires and the electric wires or cables. The wire plate 7 is made of high-insulation-resistance material, such as polycarbonate (PC) and insulating ceramic, and the outer wire plate is fixed on the steel plate by the fixing nut, and the inner wire plate is fixed on the top of the sealing block by the fixing nut.

[0036] A plurality of through holes are uniformly distributed on the steel plate and the wire plate, and the number of the through holes corresponds to the number of the wires and the wire ends. After the wires pass through the sealing block, they pass through the corresponding through holes on the steel plate and the wire plate and are connected to the wire ends. The through holes on the steel plate and the wire plate are filled with the insulator 2 to fix the wires and increase the insulation resistance of the wires.

[0037] The mounting method of the embodiment is the same as above, except that the shape and size of the backing plate 6 need to be modified, as shown in the accompanying drawings. Figure 5 As shown in the accompanying drawings, through holes are processed on the backing plate to facilitate the passage of the electric wires or cables and the connection of the wire ends on the inner wire plate. In this embodiment, one conical wire hole can be connected to multiple electric wires or cables, and is suitable for electrical connection of multiple electrical equipment in the vacuum container.

[0038] The utility model adopts the mode of sealing and insulation for the wires to pass through the sealing block, realizes the electrical connection of the electrical equipment in the vacuum container and the power supply outside the container, and guarantees the vacuum degree of the vacuum container. The pre-tightening force of one fastening nut is installed in cooperation with the elastic rubber sealing block, which can realize the planar sealing of the conical wire hole. The processing error of the conical wire hole is relaxed, and the application range is widened. In order to fully utilize the atmospheric pressure to improve the sealing effect, the large hole of the conical hole is on the outside, that is, the fastening nut is installed in the container, and the sealing pressure applied on the sealing block is the sum of the pre-tightening force and the atmospheric pressure. Even if the pre-tightening force gradually decreases or disappears with time, the sealing block still maintains sealing under the action of the atmospheric pressure. The wires are insulated from the rubber sealing block by the insulation layer, the insulator or the insulating plate. Rubber belongs to insulating material, and the rubber sealing block is insulated from the container wall, which improves the insulation safety.

[0039] The utility model can be sold together with the backing plate.

Claims

1. A sealing member for a vacuum feedthrough cooperating with a conical hole, characterized in that: It comprises electric connecting component, insulator, mounting component and sealing block, wherein the sealing block is a circular truncated cone body. The mounting component comprises fastening nut, screw rod pipe and steel plate, the steel plate is welded on one end of the screw rod pipe, the other end of the screw rod pipe is processed with external thread, and the fastening nut is connected by thread; the steel plate is located on the bottom of the sealing block, and the external thread segment of the screw rod pipe extends out of the top of the sealing block. The electric connecting component comprises wire and connecting terminal, the wire is located in the screw rod pipe, and the connecting terminal is located on both ends of the screw rod pipe; the connecting terminal comprises connecting column and copper plate, the connecting column is fixed on the outer end of the copper plate, and the inner end of the copper plate is connected with the wire; the electric connecting component is connected with the screw rod pipe through the insulator.

2. A sealing member for vacuum feedthrough according to claim 1, characterized in that: The copper plate is processed with through hole.

3. A sealing member for vacuum feedthrough according to claim 1, characterized in that: The inner surface of the screw rod pipe is processed with internal thread or spiral groove.

4. The sealing member for vacuum feedthrough according to claim 1, wherein: The screw rod pipe is extruded through the center of the sealing block, and the steel plate is processed with protrusion or groove on the contact surface matched with the sealing block.

5. A sealing member for a vacuum feedthrough cooperating with a conical hole, characterized in that: It comprises electric connecting component, insulator, mounting component and sealing block, wherein the sealing block is a circular truncated cone body. The mounting component comprises fastening nut, screw rod pipe and steel plate, the steel plate is welded on one end of the screw rod pipe, the other end of the screw rod pipe is processed with external thread, and the fastening nut is connected by thread; the steel plate is located on the bottom of the sealing block, and the external thread segment of the screw rod pipe extends out of the top of the sealing block. The electric connecting component comprises wire, connecting plate and connecting terminal, the wire is self-processed with insulating layer, passes through the sealing block, and is integrated with the sealing block, and both ends are connected with the connecting terminal; the connecting terminal is fixed on the connecting plate, and the connecting plate is fixed by the fixing nut.

6. A sealing member for vacuum feedthrough according to claim 1 or 5, characterized in that: The sealing block covers the mounting component, and both are integrated.

7. A sealing member for vacuum feedthrough according to claim 1 or 5, characterized in that: The wire is curved.

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