Brooch relay with axial observation window

Abstract

The invention discloses a Brook relay with an axial observation window, and relates to the technical field of gas relays. A junction box cover is connected with a junction box, the junction box cover and the junction box form a cavity to protect binding posts, the junction box is provided with a wire outlet for a secondary cable to penetrate through, a lower shell and the junction box form an oil cavity, and a core support is located in the oil cavity and fixedly connected with the bottom of the junction box through screws. An opening cup rotating shaft is arranged on the upper portion of the core support, a shaft hole is arranged on the opening cup, a counter weight is added on an adjusting screw rod on the rear portion, the opening cup rotating shaft penetrates through the shaft hole on the opening cup to be fixed on the core support, the opening cup can rotate, and a yellow drying pipe fixed on the core support and a magnet on the opening cup rotate when the opening cup changes according to the height of the oil level. The gas quantity in the gas relay is detected, an alarm signal is sent out at a set value position, and the alarm signal sent out by the gas relay is transmitted to a background of a control room through a control cable connected to a binding post. And the operation condition and the liquid level height of the opening cup in the oil cavity can be conveniently observed.

Description

Technical Field

[0001] The invention relates to the technical field of gas relays, and in particular to a Buchholz relay with an axial observation window. Background Art

[0002] At present, in the relevant technology, the Buch relay (gas relay) is a protective device used for transformers. It is installed on the oil pipeline of the gas pipe between the transformer oil storage cabinet and the transformer. When the internal fault of the transformer causes the oil to decompose and produce gas or causes the oil flow to surge, the contacts of the Buch relay are activated, the specified control circuit is connected, and it is used to monitor the amount of gas generated by the transformer due to a minor internal fault or the oil flow surge caused by a serious fault. Traditional gas relays should be installed horizontally, and the arrow marked on the top cover points to the oil storage cabinet. The radial side observation window is used to observe whether the oil level is full and whether there is gas. However, during the application process, the radial space of the gas relay is often small, and the observation effect is poor due to space limitations, or even impossible to observe, which increases the work frequency and troubles of the staff. Therefore, it is very necessary to design a gas relay with an axial observation window. Summary of the invention

[0003] The purpose of the present invention is to provide a gas relay with an axial observation window, in order to solve the problem of poor observation effect of the gas relay.

[0004] The technical scheme of the present invention is: a gas relay with an axial observation window, comprising a junction box cover 1, a junction box 2, a lower shell 3, a window cover 4, a radial window glass plate 5, a limit screw 6, a sealing ring 7, a probe rod 8, a reed switch 9, a flow velocity baffle 10, a magnet 11, a flow velocity baffle shaft 12, a tension spring 13, an adjusting screw 14, a locking nut 15, a core support 16, an open cup 17, a weight 18, an open cup shaft 19, a locking nut 20, an outlet 21, an axial window glass plate 22, a vent valve 23, a probe button 24, and a terminal 25, wherein the lower shell 3 is connected to the junction box 2 by bolts, the lower shell 3 and the junction box 2 form an oil chamber, a connecting column 25 is provided in the junction box 2, the locking nut 20 is screwed on the oil chamber side of the terminal post 25, the side of the junction box 2 is provided with an outlet 21, the junction box cover 1 is installed on the upper side of the junction box 2, the core support 16 is located in the shell 3, the core support 16 It is fixedly connected to the bottom of the junction box 2 by screws, the upper end of the core bracket 16 is connected to the open cup 17 through the open cup shaft 19, the weight 18 is connected to the adjusting screw at the rear of the open cup 17, a magnet is installed on the open cup 17, the magnet on the open cup is attracted by the reed switch installed on the upper part of the core bracket 16, and a limit screw 16 is installed below the open cup 17 to limit the extreme position of the open cup downward movement. The lower part of the core bracket 16 is connected to the flow velocity baffle 10 through the flow velocity baffle shaft 12, and the upper part of the flow velocity baffle 10 is connected to the tension spring 13, the other end of the tension spring 13 is connected to the adjusting screw 14 and fixed to the core bracket 16 with a locking nut 15. A reed switch 9 is fixed on the core support 16, a magnet 11 is installed on the flow baffle 10, the flow baffle 10 is rotated to the position of the limit screw II26, the magnet 11 on the flow baffle 10 causes the reed switch 9 fixed on the lower part of the core support 16 to be attracted, the probe rod 8 is installed on the core support 16, connected to the probe button in the junction box, and connected to the probe button 24 outside the housing 3. The lower housing 3 is provided with an axial window glass plate 22, the axial window glass plate 22 is sealed with the lower housing 3 by a sealing ring 7, and the axial window glass plate 22 is covered with a window cover 4.

[0005] The junction box is provided with an air release valve 23, which passes through the bottom of the junction box and is connected to the oil chamber. When there is gas in the oil chamber that needs to be released, the air release valve can be opened to release the excess gas in the oil chamber.

[0006] The position of the open cup 17 corresponds to the position of the axial window glass plate 22 , and there is an axial hole on the open cup 17 . An open cup rotating shaft 19 is installed on the core bracket 16 , and the open cup rotating shaft 19 is connected to the axial hole of the open cup 17 , so that the open cup 17 can rotate.

[0007] The flow velocity baffle 10 is provided with an axial hole, the lower part of the core support 16 is connected to the flow velocity baffle rotating shaft 12, the flow velocity baffle rotating shaft 12 passes through the axial hole, and the flow velocity baffle 10 rotates around the flow velocity baffle rotating shaft 12.

[0008] The beneficial technical effect of the present invention is that the addition of the axial window can facilitate observation of the operation of the open cup and the liquid level in the oil cavity of the gas relay when the radial space is insufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a structural schematic diagram of the present invention.

[0010] Figure 2 yes Figure 1 sectional view of .

[0011] Figure 3 yes Figure 1 Left view of .

[0012] Figure 4 yes Figure 1 Top view of the .

[0013] Among them, 1 junction box cover, 2 junction box, 3 lower shell, 4 window cover, 5 radial window glass plate, 6 limit screw I, 7 sealing ring, 8 probe rod, 9 reed switch, 10 flow rate baffle, 11 magnet, 12 flow rate baffle shaft, 13 tension spring, 14 adjustment screw, 15 locking nut, 16 core bracket, 17 open cup, 18 weight, 19 open cup shaft, 20 lock nut, 21 outlet, 22 axial window glass plate, 23 air release valve, 24 probe button, 25 terminal. DETAILED DESCRIPTION

[0014] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0015] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0016] In an embodiment of the present invention, Figure 1 and Figure 2As shown, a gas relay (also called Buch relay) for railway locomotive transformer relates to the field of gas relays; the gas relay for transformer is installed on the oil pipeline between the transformer and the oil storage cabinet, and there is oil in the oil pipeline. The gas relay for transformer includes a junction box cover 1, a junction box 2, a lower shell 3, a window cover 4, a radial window glass plate 5, a limit screw 6, a sealing ring 7, a probe rod 8, a reed switch 9, a flow rate baffle 10, a magnet 11, a flow rate baffle shaft 12, a tension spring 13, an adjusting screw 14, a locking nut 15, a core bracket 16, an open cup 17, a heavy hammer 18, an open cup shaft 19, a locking nut 20, an outlet 21, an axial window glass plate 22, a vent valve 23, a probe button 24, and a terminal 25. The junction box cover is connected to the junction box to form a cavity with the junction box to protect the terminal 25. The junction box is provided with a wire outlet 21 for the secondary cable to pass through. The lower housing 3 and the junction box 2 form an oil chamber, and the core bracket 16 is located in the oil chamber and is fixedly connected to the bottom of the junction box 2 by screws. An open cup shaft 19 is provided on the upper part of the core bracket 16, and an axial hole is provided on the open cup 17. A weight 18 is added to the rear adjustment screw. The open cup shaft 19 passes through the axial hole on the open cup 17 and is fixed on the core bracket 16. The open cup 17 is rotatable. The dry yellow tube fixed on the core bracket 16 and the magnet on the open cup 17 detect the gas volume in the gas relay when the open cup 17 rotates according to the change of the oil level height, and sends out an alarm signal at the set value position. The alarm signal sent by the gas relay is transmitted to the background of the control room through the control cable connected to the terminal.

[0017] There is also a velocity baffle rotating shaft 12 at the lower part of the core support 16 in the oil chamber, which passes through the axial hole on the velocity baffle 10 and is fixed on the core support 16. A tension spring 13 is connected to the upper part of the velocity baffle 10, and the other end of the tension spring 13 is connected to the adjusting screw 14 and fixed to the core support 16 with a locking nut 15. The flow rate setting value of the gas relay is adjusted by adjusting the screw 15 to pull the tension spring 13. When the oil flow rate inside the gas relay reaches the setting value, the velocity baffle 10 rotates to the limit position, and the magnet 11 on the velocity baffle 10 causes the reed switch 9 fixed on the core support 16 to attract, and a velocity trip signal is issued, and the velocity trip signal is transmitted to the backstage of the control room through the terminal 25 and the control cable connected thereto.

[0018] In order to conveniently observe the operation status and liquid level of the open cup 17 in the oil chamber of the gas relay, observation windows are arranged on both axial sides of the lower shell, and the observation windows are composed of a window cover 4, an axial window glass plate 22 and a sealing ring 7.

[0019] The probe button 24 is located in the junction box, passes through the bottom of the junction box and is connected to the probe rod 8 in the oil chamber. When the probe button 24 is pressed, the flow rate baffle can be rotated to test whether the flow rate trip signal can be reliably connected.

[0020] In addition, the gas relay for railway locomotive transformer (also called Buchholz relay) in the above technical solution provided by the present invention may also have the following additional technical features: In the above technical solution, preferably, the gas relay for railway locomotive transformer (also called Buchholz relay) further includes: a limit screw 6, which is fixed on the core bracket and is used to limit the extreme position of the downward movement of the opening cup.

[0021] In the above technical solution, preferably, the gas relay (also called Buchholz relay) for railway locomotive transformer also includes: a locking anti-loosening nut 20, which is screwed on the oil chamber side of the terminal 25 to tighten the lead of the reed switch 9, thereby preventing the nut from falling into the transformer and causing transformer failure.

Claims

1. A Buch relay with an axial observation window, comprising a junction box cover (1), a junction box (2), a lower housing (3), a window cover (4), a radial window glass plate (5), a stop screw (6), a sealing ring (7), a probe rod (8), a reed switch (9), a flow velocity baffle (10), a magnet (11), a flow velocity baffle shaft (12), a tension spring (13), an adjusting screw (14), a locking nut (15), a core support (16), an open cup (17), a weight (18), an open cup shaft (19), a locking nut (20), a wire outlet (21), an axial window glass plate (22), a vent valve (23), a probe button (24), and a terminal (25), characterized in that: The lower shell (3) is connected to the terminal box (2) by bolts. The lower shell (3) and the terminal box (2) form an oil chamber. A connecting column (25) is provided in the terminal box (2). A locking nut (20) is screwed on the oil chamber side of the connecting column (25). A wire outlet (21) is provided on the side of the terminal box (2). A terminal box cover (1) is installed on the upper side of the terminal box (2). The core support (16) is located in the shell (3). The core support (16) is fixedly connected to the bottom of the terminal box (2) by screws. The upper end of the core support (16) is connected to the open cup (17) through the open cup rotating shaft (19). A weight (18) is connected to the adjusting screw at the rear of the open cup (17). A magnet is installed on the open cup (17) and is attracted by the reed switch (9) on the upper part of the core support (16). A limit screw I (6) is installed below the open cup (17) to limit the limit position of the open cup (17) running downward. The lower part of the core support (16) passes through the flow velocity The baffle shaft (12) is connected to the flow velocity baffle (10), the upper part of the flow velocity baffle (10) is connected to a tension spring (13), the other end of the tension spring (13) is connected to an adjusting screw (14) and is fixed to a core support (16) by a locking nut (15); a reed switch (9) is fixed to the lower part of the core support (16), a magnet (11) is installed on the flow velocity baffle (10), and the flow velocity baffle (10) is rotated to the limit position II (26), and the flow velocity baffle (10) is The magnet (11) attracts the reed switch (9) fixed on the core support (16); a probe rod (8) is installed on the core support (16) and is connected to a probe button in the junction box; the probe button (24) outside the shell (3) is connected; the lower shell (3) is provided with an axial window glass plate (22); the axial window glass plate (22) and the lower shell (3) are sealed by a sealing ring (7); and the axial window glass plate (22) is covered with a window cover (4).

2. A Buchner relay with an axial observation window according to claim 1, characterized in that: An air release valve (23) is provided inside the junction box.

3. The Buchholz relay with an axial observation window according to claim 1, characterized in that: The position of the open cup (17) corresponds to the position of the axial window glass plate (22), an axial hole is provided on the open cup (17), an open cup rotating shaft (19) is installed on the core support (16), the open cup rotating shaft (19) is connected to the axial hole of the open cup (17), and the open cup (17) is rotatable.

4. A Buchner relay with an axial observation window according to claim 1, characterized in that: The flow velocity baffle (10) is provided with an axial hole, the lower part of the core support (16) is connected to the flow velocity baffle rotating shaft (12), the flow velocity baffle rotating shaft (12) passes through the axial hole, and the flow velocity baffle (10) rotates around the flow velocity baffle rotating shaft (12).

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