Electric connector for sealing pressure container

Abstract

The utility model discloses an electric connector used for sealing a pressure vessel, and a fixed end comprises a plug protection sleeve which is a cylindrical body with a hole in the middle and comprises an upper section, a middle section and a lower section, the end face of the upper section is provided with a cross section of a first shape, the center hole of the upper section is internally provided with an internal thread, and a binding post carrier is in fastening connection with the plug protection sleeve through the internal thread; the outer connecting cap is provided with a first center hole, the center hole is provided with a cross section with a second shape, the cross section is matched with the first shape of the end face of the upper section of the plug protective sleeve, the plug protective sleeve is guided to penetrate into the hole of the outer connecting cap, and the center hole of the outer connecting cap is provided with threads upwards from the bottom end part; the threaded base is in threaded connection with the outer connection cap, the binding post carrier connected with the plug protection sleeve is fixed to the threaded base, and the threaded base is fixed to the surface of the sealed pressure container in a sealed mode; and the binding post carrier is fixed at the upper end part of the outer connecting cap through the upper end nut.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, in particular to an electric connector for sealing a pressure vessel. Background Art

[0002] Sealed electrical connectors mainly have the characteristics of sealing and good resistance to high and low temperatures. When installing electrical appliances in sealed pressure vessels, cables need to be led out of the vessel, which not only needs to be conductive and insulated, but also pressure-resistant and sealed. CN118655697A and CN118655696A applied for by the applicant both disclose "a laser scanning device". This laser equipment is used in the online laser measurement project of blast furnace material surface. This structure can place the reflector rotating structure inside the water jacket. However, considering the specific usage scenario, how to fix the laser detection device in the water jacket and realize the laser scanning function together with the water jacket requires solving the problem of how to seal. For example: seal the laser transmission line at the tail end of the barrel of the laser scanning device to prevent pressure leakage. General electrical connectors are only suitable for use in conventional environments, or have basic functions such as waterproof, dustproof, insulated, and explosion-proof. Utility Model Content

[0003] The present application aims to provide an electrical connector, particularly one designed to seal a pressure vessel to allow cable penetration. This structure secures the terminal carrier to the base via an external connection cap, fills the lower section of the plug protective sleeve with sealant to ensure a seal, and then secures the base to the sealed container. This solves the cable penetration and pressure-tightness issues.

[0004] The present application proposes an electrical connector for a sealed pressure vessel, having a fixed end and a free end, the fixed end having a terminal and a terminal carrier, the fixed end comprising: a plug protective sleeve, which is a cylindrical body with a hole in the middle, comprising an upper section, a middle section and a lower section, the end face of the upper section having a cross-section of a first shape, the hole of the upper section having an internal thread, the terminal carrier and the plug protective sleeve being fastened together by the internal thread; an external connecting cap having a first central hole, the central hole having a cross-section of a second shape, which cooperates with the first shape of the upper end face of the plug protective sleeve to guide the plug protective sleeve to pass through the hole of the external connecting cap, the central hole of the external connecting cap having a thread from the bottom end upward; a threaded base, the threaded base is threadedly combined with the external connecting cap to fix the terminal carrier connected to the plug protective sleeve on the threaded base, and the threaded base is sealed and fixed to the surface of the sealed pressure vessel; and an upper end nut, the terminal carrier connected to the plug protective sleeve is passed upward along the bottom end of the external connecting cap, and the terminal carrier is fixed to the upper end of the external connecting cap by the upper end nut.

[0005] Optionally, the electrical connector includes a detachable crimping nut, which includes a first structure and a second structure. The wiring passes through the first structure and is compressed by the second structure. The two structures can adapt to the thickness and quantity requirements of the wiring through adjusting screws.

[0006] Optionally, the first structure and the second structure are fastened by at least one adjusting screw.

[0007] Optionally, the detachable crimping nut is threadedly fastened to the plug protective sleeve, wherein the crimping nut has an internal thread and the outer wall of the lower section of the plug protective sleeve has an external thread.

[0008] Optionally, the detachable wire crimping nut is integrally formed, the first structure is cylindrical and has a second center hole, the inner wall of the second center hole has a thread, and the second structure cooperates with the first structure to fix the wiring.

[0009] Optionally, the upper surface of the middle section is grooved axially downward to provide an accommodation space with a circumferential groove structure. The accommodation space with the circumferential groove structure accommodates a sealing gasket, which is an O-shaped elastic member.

[0010] Optionally, the upper nut and the middle section of the plug protective sleeve restrict the terminal carrier within the outer connection cap to form an airtight seal.

[0011] Optionally, the cavity of the lower section of the plug protective sleeve containing the wiring is filled with sealant.

[0012] Optionally, the external connection cap is a spinal canal nut, and the central hole of the external connection cap has a spinal canal thread from the bottom end upwards.

[0013] Optionally, the threaded base has a cylindrical external thread or a conical external thread matching the internal thread of the external connection cap, and the threaded base has a through hole, and the wiring passes through the threaded base through a wall or penetrates a sealed high-pressure container.

[0014] Optionally, the threaded base is sealed and fixed to the pressure vessel, and the threaded base is fixed on a flange or fixed with a gasket.

[0015] Optionally, the terminal carrier has a first thread and a second thread, the second thread is threadedly connected to the upper nut and the plug protective sleeve, and the first thread is threadedly sealed to the free end.

[0016] Compared with the prior art, the advantages of this application are:

[0017] 1. There are multiple airtightness guarantees. After some high-pressure gas enters the threaded base, the gas may rise along the outer wall of the plug protective cover because the lower part of the plug protective cover is sealed with sealant. Because the middle part has a sealing gasket and the upper surface of the external connection cap supports it and the terminal carrier is connected to the plug protective cover through the upper nut, the airtightness is guaranteed. It is used on dangerous gas high-pressure containers to ensure that toxic gases cannot escape.

[0018] 2. While ensuring airtightness, allow cables, wires, optical fibers and other wires to penetrate the high-voltage sealed structure for detection or power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shows a schematic diagram of an exploded three-dimensional assembly of an electrical connector;

[0020] Figure 2 shows a schematic perspective cross-sectional view of an electrical connector;

[0021] Figure 3a Shows an overall schematic diagram of the plug protective cover;

[0022] Figure 3b Shows another overall schematic diagram of the plug protective cover from another angle;

[0023] Figure 4 A perspective view of an outer connection cap is shown;

[0024] Figure 5 Shows an exploded orthographic diagram of a three-dimensional assembly of an electrical connector;

[0025] Figure 6 A schematic diagram of the three-dimensional assembly orthographic projection of an electrical connector is shown. DETAILED DESCRIPTION

[0026] The technical solution of the present application is described in detail below with reference to the accompanying drawings and embodiments. In these drawings, identical or similar components are denoted by identical or similar reference numerals. Furthermore, the sealing structure of the present application is not limited to the use in the embodiments.

[0027] like Figure 1 The figure is a schematic diagram of the exploded three-dimensional assembly of the sealing structure. For the sake of simplicity, the following will be Figure 1 The upper end portion is called the top end portion, and the lower end portion is called the bottom end portion.

[0028] The electrical connector 100 primarily seals the terminal carrier 102 and its wiring 102a, used to install electrical appliances in pressure vessels and protect the terminal and its wiring. The electrical connector 100 may have a fixed end and a free end. Typically, the fixed end may contain a terminal or a metal sheet, and the fixed end includes the terminal and the terminal carrier 102. The fixed end of the present application may include: a plug protective sleeve 104, an external connection cap 105, a threaded base 107, and an upper nut 101. The fixed end may also include a detachable crimping nut 106 and a sealing gasket 103 on the plug protective sleeve 104.

[0029] The connection 102a can be welded to the terminal of the terminal carrier 102 as required. The connection can be understood as a cable or other electrical connection line. The welding can be done by soldering.

[0030] According to the embodiment, the terminal carrier 102 with the wire 102a welded thereto can be installed on the plug protective cover 104, and the terminal carrier 102 and the plug protective cover 104 can be fastened together by screw threads. Specifically, the terminal carrier 102 has external threads on its outer surface, and the plug protective cover 104 has internal threads, which are arranged at the top end of the inner wall. It is understood that a portion of the inner wall of the plug protective cover 104 is processed with threads, while the remaining inner wall portion is not processed with threads. The structure will be described in detail in the following. Figure 3a and Figure 3b The terminal carrier 102 is screwed to the bottom end of the plug protective cover 104, and the terminal carrier 102 with external threads partially extends out of the top end of the plug protective cover 104. Figure 2 The sealing structure is shown in area A in the three-dimensional cross-sectional schematic diagram.

[0031] Pour the special sealant from the bottom of the plug protective cover 104 and let it stand for 24 hours to allow the sealant to solidify completely. Figure 2 The three-dimensional cross-sectional diagram of the sealing structure is shown in area B.

[0032] The detachable wire nut 106 is divided into two parts, a first structure 106a and a second structure 106b. The wire nut is preferably threadedly fastened to the plug protective cover 104 as the first structure 106a, wherein the wire nut 106a has an internal thread and the outer wall of the plug protective cover 104 has an external thread. After the wiring 102a is passed through the wire nut, the wire block 106b is preferably used as the second structure to be compressed to prevent the cable from twisting off. Specifically, the wire block 106b and the wire nut 106a are fastened by at least one screw. The wire nut 106a is cylindrical and has a center hole. The inner wall of the hole has a section of internal thread. The wire block 106b cooperates with the wire nut 106a to fix the wiring. The wire nut 106a and the wire block 106b can be integrally formed as an injection molded part, and the two are adapted to the thickness and quantity requirements of the wiring 102a by adjusting the screw.

[0033] Figure 3a and Figure 3b The structure of the plug protective cover 104 is shown. The plug protective cover 104 is a cylindrical body with a hole in the middle, comprising an upper section 104A, a middle section 104B, and a lower section 104C. The hole in the upper section 104A has an internal thread, and its outer circumferential surface has an external thread. The outer circumferential surface is partially cut away axially from the upper end surface to the upper surface of the middle section 104B. The upper end has a first cross-sectional shape. As can be seen from the figure, the upper end of the upper section 104A is D-shaped, rather than circular. Optionally, the projection of the upper end surface of the upper section 104A can be a double D-shape (not shown). The middle section 104B has an axial thickness, and its radius is greater than that of the upper section 104A. The upper surface of the middle section 104B is grooved axially downward, providing a circumferential groove structure for accommodating space. The inner diameter of the middle section 104B is the same as that of the upper section 104A, but it lacks internal threads, while its outer circumferential surface has external threads.

[0034] The accommodating space of the middle section 104B with the circumferential groove structure can Figure 1 The middle sealing gasket 103 is accommodated. Specifically, the sealing gasket 103 is an O-shaped elastic part. The elastic part material can be rubber or resin. The sealing gasket 103 arranged on the middle section 104B can ensure the airtightness of the terminal carrier 102 through the middle section 104B of the plug protective cover 104. The accommodation space with a circumferential groove structure of the middle section 104B can ensure that the sealing gasket does not move, thereby ensuring effective sealing.

[0035] The terminal carrier 102 with the plug protective cover 104 is inserted upward along the bottom end of the external connection cap 105, and the terminal carrier 102 is fixed to the upper end of the external connection cap 105 through the upper end nut 101. The terminal carrier has a first thread and a second thread. The second thread is threadedly connected to the upper end nut and the plug protective cover, and the first thread is sealed with the free end thread.

[0036] See also Figure 4 , illustrates a perspective view of the external connection cap 105. Figure 4-1 is a top view, showing the external connection cap 105 having a first central hole. The first central hole has a second cross-sectional shape. As can be seen from the figure, the second cross-sectional shape is D-shaped, which mates with the upper D-shaped portion of the upper section 104A of the plug protective sleeve 104, guiding the plug protective sleeve 104 into the D-shaped hole of the external connection cap 105, ensuring accurate positioning and installation while minimizing twisting between the two.

[0037] The mating structure between the first center hole of the external connection cap 105 and the upper end of the upper section 104A of the plug protective sleeve 104 is not limited to a D-shape. They can be symmetrically cut to form a double D-shape, or processed into other shapes that allow the two to mate. When the external connection cap 105 is a spinal nut, the center hole of the external connection cap 105 has a spinal thread extending upward from the bottom end. Specifically, it can be processed into a 20mm tapered hole thread. Optionally, the upper end surface of the connection cap 105 can have multiple D-shaped holes, indicating that the external connection cap can support at least one plug protective sleeve.

[0038] The outer conical surface of the outer connection cap 105 is symmetrically cut away from the upper end surface along the axial direction to form a portion as shown in FIG. Figure 4-2 And 4-3 perspective three-dimensional structure, its front view projection is as follows Figure 2 and Figure 5 The shape shown is convex, and this processing makes it easier for the robot to pick up and install. Specifically, during assembly, when the robot clamps the flat edges on both sides of the outer circumference of the external connection cap 105, it can cooperate with the upper end nut 101 and the second thread pre-tightening coupling of the terminal carrier 102 to reduce the torsion of the cable.

[0039] like Figure 1 As shown, a threaded base 107 is threadedly connected to an external connection cap 105, securing a terminal carrier 102 with a plug protective sleeve 104 to the base 107. The threaded base 107 has a cylindrical or conical external thread that matches the internal thread of the external connection cap 105. The threaded base 107 has a through hole, allowing the terminal 102a to pass through a wall or a sealed high-pressure container. The matching cylindrical external thread facilitates sealing because, during tightening, the tightening torque is concentrated on one ring of the internal and external threads, causing it to interfere and deform.

[0040] When mating with a tapered external thread, the thread pair simultaneously contacts the entire tapered surface, achieving a seal that is difficult to break. This seal is often used in high-pressure, variable-load applications. Optionally, the threaded base 107 can be independently secured to the pressure vessel via gasket welding or bonding. Alternatively, the threaded base 107 can be integral to the flange and secured to the pressure vessel via the flange.

[0041] The electrical connector of this application has multiple airtightness protections. After some high-pressure gas enters the threaded base, the gas may rise along the outer wall of the plug protective cover because the lower section of the plug protective cover is sealed with sealant. Because the middle section has a sealing gasket that supports the upper surface of the external connection cap and the upper end nut seals the terminal carrier to the plug protective cover, the airtightness is guaranteed. It is used in high-pressure containers of hazardous gases to prevent toxic gases from escaping. While ensuring airtightness, cables, wires, optical fibers, and other wires can penetrate the high-pressure sealing structure to transmit detection data or power.

[0042] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will understand that modifications or equivalent substitutions to the technical solutions of the present invention do not depart from the spirit and scope of the present invention and are intended to be encompassed by the claims of the present invention.

Claims

1. An electrical connector for sealing a pressure vessel, characterized in that: It has a fixed end and a free end, the fixed end has a terminal and a terminal carrier, and the fixed end includes: The plug protective cover is a cylindrical body with a central hole in the middle, comprising an upper section, a middle section, and a lower section. The upper section has a cross-section of a first shape, and the central hole of the upper section has an internal thread. The terminal carrier and the plug protective cover are fastened together by the internal thread. an outer connection cap having a first central hole, the central hole having a second cross-sectional shape, which cooperates with the first shape of the upper end surface of the plug protective sleeve to guide the plug protective sleeve into the hole of the outer connection cap, and the central hole of the outer connection cap has a thread extending upward from the bottom end; a threaded base, the threaded base being threadedly engaged with the external connection cap, the terminal carrier connected to the plug protective sleeve being fixed on the threaded base, the threaded base being sealed and fixed to the surface of the sealed pressure vessel; and The upper end nut is used to insert the terminal carrier connected to the plug protective cover upward along the bottom end of the outer connection cap, and the terminal carrier is fixed to the upper end of the outer connection cap through the upper end nut.

2. The electrical connector according to claim 1, wherein: It also includes a detachable wire-pressing nut, which includes a first structure and a second structure. The wiring passes through the first structure and is compressed by the second structure. The two structures can adapt to the thickness and quantity requirements of the wiring through the adjustment screw.

3. The electrical connector according to claim 2, wherein: The first structure and the second structure are fastened by at least one adjusting screw.

4. The electrical connector according to claim 2, wherein: The detachable crimping nut is threadedly fastened to the plug protective sleeve, wherein the crimping nut has an internal thread, and the outer wall of the lower section of the plug protective sleeve has an external thread.

5. The electrical connector according to claim 2, wherein: The detachable wire crimping nut is integrally formed, the first structure is cylindrical and has a second center hole, the inner wall of the second center hole has threads, and the second structure cooperates with the first structure to fix the wiring.

6. The electrical connector according to claim 1, wherein: The upper surface of the middle section is grooved axially downward to provide an accommodation space with a circumferential groove structure. The accommodation space with the circumferential groove structure accommodates a sealing gasket, which is an O-shaped elastic member.

7. The electrical connector according to claim 1, wherein: The upper nut and the middle section of the plug protective sleeve limit the terminal carrier within the outer connection cap to form an airtight seal.

8. The electrical connector according to claim 1, wherein: The cavity containing the wiring in the lower section of the plug protective cover is filled with sealant.

9. The electrical connector according to claim 1, wherein: The outer connection cap is a spinal canal nut, and the central hole of the outer connection cap has a spinal canal thread from the bottom end upwards.

10. The electrical connector according to claim 9, wherein: The threaded base has a cylindrical external thread or a conical external thread matching the internal thread of the external connection cap. The threaded base has a through hole, and the wiring passes through the threaded base through a wall or penetrates a sealed high-pressure container.

11. The electrical connector according to claim 9, wherein: The threaded base is sealed and fixed to the pressure container.

12. The electrical connector according to claim 1, wherein: The terminal carrier has a first thread and a second thread, the second thread is connected to the thread of the upper nut and the plug protective sleeve, and the first thread is connected to the free end through a threaded seal.

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