Aluminum casting gas tank of medium voltage switchgear and assembling method

Abstract

The application discloses a cast aluminum air tank of medium voltage switch equipment and an assembling method, and belongs to the technical field of switch equipment. The cast aluminum air tank comprises a tank body and a connecting assembly arranged on the end face of the tank body. The tank body is arranged in a boss face structure, and the connecting assembly comprises a supporting column and a spring operating mechanism. The supporting column is arranged on the boss face of the tank body, and a plurality of supporting columns are arranged. A steel wire thread sleeve is embedded in each supporting column. The supporting column is connected with the spring operating mechanism. The steel wire thread sleeve embedded in the supporting column can effectively disperse the action stress of the operating mechanism during the opening and closing actions, improve the thread connection strength, enhance the anti-seismic, anti-impact and wear resistance of the air tank positioning supporting column, realize the heat dissipation of the tank body through the heat dissipation mechanism, and increase the air circulation in the tank body and the heat dissipation efficiency through the air transmission of the air fan.

Description

A cast aluminum gas box for a medium-voltage switchgear and its assembly method Technical Field

[0001] This invention belongs to the field of cast aluminum gas box technology, specifically relating to a cast aluminum gas box for medium-voltage switchgear and its assembly method. Background Technology

[0002] Currently, 12kV ring main unit equipment, both domestically and internationally, uses stainless steel gas-insulated switchgear boxes. These boxes are first manually assembled from cut stainless steel, then sealed with gas seals using manual or laser welding equipment. Due to the large size of the gas-insulated boxes, controlling the dimensions during manual assembly and welding is difficult, resulting in low production efficiency. Furthermore, the thin walls of the gas-insulated boxes are prone to secondary deformation during welding of various surfaces and reinforcement ribs, leading to low overall mechanical strength after welding. Additionally, the connection between the stainless steel gas-insulated box and the operating mechanism of the switchgear is achieved using welded studs. The low positioning accuracy of these studs results in significant dimensional deviations in the transmission chain after installation, leading to poor consistency in the overall mechanical characteristics of the assembled unit. Currently, both domestic and international ring main unit gas-insulated boxes suffer from problems such as large box deformation, poor component installation positioning, poor product consistency, poor heat dissipation, complex manufacturing processes, and long assembly cycles, failing to meet the high reliability requirements of 12kV gas-insulated ring main units.

[0003] In the field of medium-voltage switchgear, the existing ring main unit gas boxes are basically made of stainless steel after cutting, bending and welding. This requires high welding process and the airtightness quality after welding cannot be controlled online. Stainless steel gas boxes have poor heat dissipation and low structural strength. The connection between the box body and the operating mechanism is achieved by welding studs. The stud welding positioning accuracy is poor, which leads to large deviations in the size of the mechanism transmission chain and poor consistency of the mechanical characteristics of the whole machine after assembly.

[0004] Because the spring operating mechanism is subjected to large forces during opening and closing operations, the operating stress during the opening and closing of the operating mechanism is large, resulting in poor strength of the threaded connection and poor seismic resistance, impact resistance, and wear resistance of the air box positioning support column. Summary of the Invention

[0005] The purpose of this invention is to provide a cast aluminum gas box for medium-voltage switchgear and an assembly method thereof, so as to solve the technical problem of high operating stress during the opening and closing operations of the operating mechanism of the cast aluminum gas box in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] In a first aspect, the present invention provides a cast aluminum gas box for a medium-voltage switchgear, including a box body and a connecting component provided on the end face of the box body;

[0008] The housing is configured with a boss surface structure. The connecting assembly includes a support column and a spring operating mechanism. The support column is disposed on the boss surface of the housing. There are several support columns, and each support column is embedded with a wire thread sleeve. The support column is connected to the spring operating mechanism.

[0009] By embedding steel wire threads inside the support column, the operating stress during the opening and closing of the operating mechanism can be effectively dispersed, the strength of the threaded connection can be improved, and the seismic resistance, impact resistance and wear resistance of the air box positioning support column can be enhanced.

[0010] Optionally, a spring mechanism output crank arm is also provided on the boss surface of the housing. The spring mechanism output crank arm is connected to a mechanism transmission rod, and the mechanism transmission rod is connected to a circuit breaker input shaft crank arm. The two ends of the mechanism transmission rod are movably connected to the spring mechanism crank arm and the circuit breaker input shaft crank arm to form a hinge mechanism, and the spring mechanism output crank arm is connected to the spring operating mechanism.

[0011] Optionally, the boss surface of the housing is also provided with a circuit breaker input shaft hole, and the circuit breaker input shaft hole is provided with a drive shaft connected to the crank arm of the circuit breaker input shaft.

[0012] Optionally, the boss surface of the housing is also provided with an observation hole for observing the internal condition of the housing and an isolation drive shaft hole.

[0013] Optionally, the outer wall of the box is provided with several intersecting reinforcing ribs, and the external vertical intersecting reinforcing rib structure design is adopted to fully ensure the mechanical strength of the box, while controlling and meeting the deformation requirements after the whole set is inflated.

[0014] Secondly, the present invention also provides a cast aluminum gas box for a medium-voltage switchgear, including a box body and a heat dissipation mechanism disposed on the side of the box body;

[0015] The heat dissipation mechanism includes a cooling fan disposed outside the cover, and also includes a blower belt with air vents, the blower belt being connected to the interior of the housing.

[0016] The cooling mechanism is designed to dissipate heat from the enclosure, and the air generated by the cooling fan is transported through a blower belt to increase airflow inside the enclosure, thereby increasing cooling efficiency.

[0017] Optionally, there are several air vents, and each air vent is equipped with a filter screen. By setting the filter screen, large particles of impurities are prevented from entering the box and damaging the box parts.

[0018] Optionally, the inside of the cover is provided with a spring for controlling the extension and retraction of the blower belt. The spring is connected to the blower belt via a hook. The extension and retraction of the blower belt is controlled by the spring. The end of the blower belt is provided with a magnetic block that connects to the inner wall of the box. The blower belt is fixed by the magnetic block.

[0019] Thirdly, the present invention also provides a method for assembling a cast aluminum gas box for a medium-voltage switchgear according to the first and second aspects, comprising:

[0020] a: Select the mold for making the box;

[0021] b: The aluminum alloy raw material is fed into the die-casting machine for melting;

[0022] c: The molten raw material is poured into a mold and die-cast into shape;

[0023] d: Assemble the die-cast box.

[0024] Optionally, assembling the die-cast housing specifically includes:

[0025] Embed steel wire thread sleeves into the support columns on the boss surface of the housing, then hinge the two ends of the mechanism transmission rod to the output crank arm of the spring mechanism and the input crank arm of the circuit breaker respectively, and then connect the spring operating mechanism to the output crank arm of the spring mechanism.

[0026] The left and right sides of the enclosure are welded with reinforcing ribs. The enclosure has a door that matches the cover in the heat dissipation mechanism. Pulling the blower belt in the cover magnetically connects the magnetic block to the inner wall of the enclosure.

[0027] The beneficial effects and advantages of this invention are as follows:

[0028] The cast aluminum gas box and assembly method of this medium-voltage switchgear effectively disperse the operating stress during the opening and closing of the operating mechanism by embedding steel wire threads in the support column, improving the strength of the threaded connection and enhancing the shock resistance, impact resistance, and wear resistance of the gas box positioning support column. A heat dissipation mechanism is implemented to cool the box, and the air generated by the cooling fan is transmitted through a blower belt, increasing airflow inside the box and improving heat dissipation efficiency. A filter screen prevents large particles from entering the box and damaging its components. A spring-loaded mechanism controls the extension and retraction of the blower belt, and magnetic blocks secure the blower belt. The integrated mold casting process results in a short production cycle. The high degree of integration of the installation and positioning structure modules of each component ensures the consistency of the structural dimensions required for component installation, indirectly guaranteeing the consistency and reliability of the overall mechanical characteristics of the assembled product. Attached Figure Description

[0029] Figure 1 is a schematic diagram of the structure of the present invention;

[0030] Figure 2 is a side view of the present invention;

[0031] Figure 3 is a top view of the present invention;

[0032] Figure 4 is a schematic diagram of the connection of the spring operating mechanism of the present invention;

[0033] Figure 5 is an enlarged view of the connection between the support column and the wire thread sleeve of the present invention;

[0034] Figure 6 is a schematic diagram of the heat dissipation mechanism of the present invention;

[0035] Figure 7 is a schematic diagram of the internal structure of the heat dissipation mechanism of the present invention;

[0036] Figure 8 is an enlarged schematic diagram of the blower belt of the present invention.

[0037] In the diagram: 1-box body, 2-support column, 3-wire threaded sleeve, 4-spring operating mechanism, 5-spring mechanism output crank arm, 6-mechanism transmission rod, 7-circuit breaker input shaft crank arm, 8-reinforcing rib, 9-observation hole, 10-isolation transmission shaft hole, 11-circuit breaker input shaft hole, 111-heat dissipation mechanism, 112-box cover, 113-heat dissipation fan, 114-spring spring, 115-blowing belt, 116-blowing outlet, 117-filter screen, 118-magnetic block. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Example 1:

[0042] Referring to Figures 1 to 5, this embodiment provides a cast aluminum gas box for a medium-voltage switchgear, including a box body 1. In this embodiment, the box body 1 is preferably configured as a boss surface structure.

[0043] Referring to Figures 1, 2, 3 and 4, in this embodiment, the boss surface structure of the housing 1 refers to having a number of support columns 2, and a pair of observation holes 9 are provided on the boss surface structure of the housing 1. The observation holes 9 are preferably set with glass or acrylic material embedded in them to realize the observation of the inside of the housing 1. An isolation drive shaft hole 10 is provided in the middle of the pair of observation windows 9, and a circuit breaker input shaft hole 11 is provided on the side of the isolation drive shaft hole 10.

[0044] In this embodiment, a spring mechanism output crank arm 5 is also provided on the boss surface of the housing 1. The spring mechanism output crank arm 5 is connected to a mechanism transmission rod 6, and the mechanism transmission rod 6 is connected to a circuit breaker input shaft crank arm 7. In this embodiment, a transmission shaft is provided in the circuit breaker input shaft hole 11 and connected to the circuit breaker input shaft crank arm 7. The two ends of the mechanism transmission rod 6 are movably connected to the spring mechanism crank arm 5 and the circuit breaker input shaft crank arm 7 to form a hinge mechanism, and the spring mechanism output crank arm 5 is connected to the spring operating mechanism 4.

[0045] Referring to Figures 1, 2, and 5, in this embodiment, a plurality of support columns 2 are preferably provided, and each support column 2 is embedded with a wire thread sleeve 3. The support column 2 is connected to the spring operating mechanism 4, which can effectively disperse the operating stress during the opening and closing of the operating mechanism, improve the threaded connection strength, and enhance the shock resistance, impact resistance, and wear resistance of the air box positioning support column 2.

[0046] Referring to Figures 1, 2 and 3, in this embodiment, a number of intersecting reinforcing ribs 8 are provided on the outer side wall of the box 1. The external vertically intersecting reinforcing ribs 8 are designed to fully ensure the mechanical strength of the box 1, while controlling and meeting the deformation requirements after the whole set is inflated.

[0047] Example 2:

[0048] Referring to Figures 1 to 8, based on Embodiment 1, this embodiment also incorporates the following design:

[0049] Referring to Figure 6, this embodiment also provides a heat dissipation mechanism 111, wherein the heat dissipation mechanism 111 includes a cover 112, and the cover 112 is preferably a cover 112 adapted to the door of the box body 1.

[0050] Referring to Figures 6, 7 and 8, in this embodiment, a cooling fan 113 is also provided on the outside of the box cover 112, wherein the cooling fan 113 is preferably provided inside the fan guard, and the top of the fan guard is also provided with an outwardly inclined shielding eave.

[0051] In this embodiment, a spring-loaded spring 114 is installed inside the cover 112. The spring-loaded spring 114 is connected to a blower belt 115 via a hook. In this embodiment, a plurality of air vents 116 are arranged in an array on the blower belt 115. Each air vent 116 is equipped with a filter screen 117. A magnetic block 118 is provided at the end of the blower belt 115. In this embodiment, the magnetic block 118 is magnetically attracted to the inner wall of the box 1. When in use, by pulling the blower belt 115, the blower belt 115 is extended under the action of the spring-loaded spring 114, which attracts the magnetic block 118 to the inner wall of the box 1. When the cooling fan 113 is running, the air is delivered to the inside of the box 1 through the blower belt 115 and the air vents 116, increasing the air circulation speed inside the box 1 to achieve cooling and heat dissipation.

[0052] In this embodiment, the mainspring 114 and the blower belt 115 are preferably configured as a pair, and the blower belt 115 is preferably made of rubber material. By setting a filter screen 117 at the blower outlet 116, large particles of impurities are prevented from entering the interior of the housing 1 and causing damage to the parts of the housing 1.

[0053] Example 3:

[0054] Referring to Figures 1 to 8, this embodiment also provides an assembly method for the cast aluminum gas box of a medium-voltage switchgear, including:

[0055] a: Select the mold to make box 1;

[0056] b: The aluminum alloy raw material is fed into the die-casting machine for melting;

[0057] c: The molten raw material is poured into a mold and die-cast into shape;

[0058] d: Assemble the die-cast box 1.

[0059] Specifically:

[0060] Embed the steel wire thread sleeve 3 into the support column 2 on the boss surface of the housing 1, then hinge the two ends of the mechanism transmission rod 6 to the spring mechanism output crank arm 5 and the circuit breaker input shaft crank arm 7 respectively, and then connect the spring operating mechanism 4 to the spring mechanism output crank arm 5.

[0061] The left and right sides of the box 1 are welded with reinforcing ribs 8. The box 1 has a door. The door is compatible with the cover 112 in the heat dissipation mechanism 111. Pulling the blower belt 115 in the cover 112 magnetically connects the magnetic block 118 to the inner wall of the box 1.

[0062] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A cast aluminum gas box for a medium-voltage switchgear, characterized in that: The enclosure includes a housing (1) and a connecting assembly on the end face of the housing (1). The housing (1) is configured as a boss surface structure, and several intersecting reinforcing ribs (8) are provided on the outer side wall of the housing (1). A pair of observation holes (9) for observing the internal condition of the housing (1) are also provided on the boss surface structure of the housing (1). An isolation drive shaft hole (10) is provided in the middle of the pair of observation holes (9). A circuit breaker input shaft hole (11) is provided on the side of the isolation drive shaft hole (10). The connecting assembly includes a support column (2) and a spring operating mechanism (4). The support column (2) is provided on the boss surface of the housing (1). Several support columns (2) are provided, and a wire thread sleeve (3) is embedded in each support column (2). The support column (2) is connected to the spring operating mechanism (4). The cast aluminum gas The box also includes a heat dissipation mechanism (111) disposed on the side of the box body (1); the heat dissipation mechanism (111) includes a heat dissipation fan (113) disposed outside the box cover (112), the heat dissipation mechanism (111) also includes a blower belt (115), the blower belt (115) is provided with a blower nozzle (116), the blower belt (115) is connected to the inside of the box body (1); the blower nozzle (116) is provided in a plurality of places, and each blower nozzle (116) is provided with a filter screen (117); the inside of the box cover (112) is provided with a spring spring (114) for controlling the extension and retraction of the blower belt (115), the spring spring (114) is connected to the blower belt (115) by a hook, and the end of the blower belt (115) is provided with a magnetic block (118) connected to the inner wall of the box body (1).

2. The cast aluminum gas box of a medium-voltage switchgear according to claim 1, characterized in that: A spring mechanism output crank arm (5) is also provided on the boss surface of the housing (1). The spring mechanism output crank arm (5) is connected to a mechanism transmission rod (6). The mechanism transmission rod (6) is connected to a circuit breaker input shaft crank arm (7). The two ends of the mechanism transmission rod (6) are movably connected to the spring mechanism output crank arm (5) and the circuit breaker input shaft crank arm (7) to form a hinge mechanism. The spring mechanism output crank arm (5) is connected to the spring operating mechanism (4).

3. The cast aluminum gas box of a medium-voltage switchgear according to claim 2, characterized in that: The box (1) is also provided with a circuit breaker input shaft hole (11) on the boss surface, and the circuit breaker input shaft hole (11) is provided with a drive shaft connected to the circuit breaker input shaft crank arm (7).

4. A method for assembling a cast aluminum gas box for a medium-voltage switchgear according to claim 3, characterized in that: The process includes: a: selecting a mold for making the box (1); b: smelting aluminum alloy raw materials in a die casting machine; c: smelting the liquid raw materials obtained from the smelting process into a mold for die casting; d: assembling the die-cast box (1); the assembly of the die-cast box (1) specifically includes: embedding a steel wire thread sleeve (3) into the support column (2) on the boss surface of the box (1), then hinge the two ends of the mechanism transmission rod (6) to the spring mechanism output crank arm (5) and the circuit breaker input shaft crank arm (7) respectively, and then connect the spring operating mechanism (4) to the spring mechanism output crank arm (5); the left and right sides of the box (1) are welded with reinforcing ribs (8), the box (1) is reserved with a box door, the box door is adapted to the box cover (112) in the heat dissipation mechanism (111), and the blower belt (115) in the box cover (112) is pulled to magnetically connect the magnetic block (118) to the inner wall of the box (1).

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