A gas-liquid self-balancing sealing structure of a vanadium battery electrolyte storage tank

Abstract

This application relates to the technical field of vanadium batteries, and in particular to a gas-liquid self-balancing sealing structure for a vanadium battery electrolyte storage tank. The structure includes a tank body and a mounting box mounted on the top of the tank body via a mounting bracket. A sealing cap is provided at the outlet of the top of the tank body. A transmission gear is rotatably mounted inside the mounting box. A connecting rod is threaded onto the bottom of the transmission gear. A threaded rod is fixedly mounted on the bottom of the transmission gear, and a threaded sleeve is fixedly mounted on the top of the connecting rod. This invention, by incorporating components such as the threaded rod, threaded sleeve, connecting rod, and plug, enables the threaded rod to rotate synchronously, thereby facilitating control of the connection between the connecting rod and the balance tube. It also allows for easy opening and closing of the plug and balance tube. When the pressure inside the tank body increases, it prevents external gas from entering, thus conveniently controlling the hydraulic balance inside the tank body.

Description

Technical Field

[0001] This application relates to the technical field of vanadium batteries, and in particular to a gas-liquid self-balancing sealing structure for a vanadium battery electrolyte storage tank. Background Technology

[0002] A vanadium redox flow battery (VRB), also known as a vanadium battery, is a liquid redox regenerative battery that uses vanadium ions as the active material. The positive and negative electrolytes are stored independently in external tanks. During charging and discharging, the electrolytes at the positive and negative electrodes undergo redox reactions across the ion exchange membranes. The sealing performance of the storage tank, as a crucial container for the electrolyte, directly affects the safe operation and performance stability of the battery.

[0003] A search revealed Chinese Patent Publication No. CN220696386U, which discloses a high-concentration vanadium battery electrolyte mixing tank. The tank includes a tank body with a discharge pipe connected to its bottom. A counter-flushing mixing mechanism is located inside the tank, with its inlet end connected to an inlet pipe extending out of the tank body as a return end for the electrolyte. The counter-flushing mixing mechanism includes a first supply pipe and a second supply pipe connected to each other. The first supply pipe is connected to the discharge pipe, and the side of the first supply pipe facing the second supply pipe has discharge holes. The side of the second supply pipe facing the first supply pipe also has discharge holes. This design addresses the problem of existing closed-type vanadium battery electrolyte storage tanks failing to ensure electrolyte uniformity during operation.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following shortcomings: As a crucial storage container for the electrolyte, the sealing performance of the electrolyte storage tank directly affects the safe operation and performance stability of the battery. However, existing electrolyte storage tank sealing structures often have problems in practical applications. Vanadium batteries may experience gas-liquid imbalance, which not only reduces battery performance but may also shorten its lifespan. Due to interference with the electrolyte circulation and reaction environment, the internal chemical reactions of the battery may deviate from ideal conditions, leading to electrolyte decomposition or electrode material corrosion. These problems accumulate gradually, ultimately causing battery performance degradation and potentially even safety issues. Utility Model Content

[0005] To address the problems mentioned in the background section, this application provides a gas-liquid self-balancing sealing structure for a vanadium battery electrolyte storage tank.

[0006] This application provides a gas-liquid self-balancing sealing structure for a vanadium battery electrolyte storage tank, employing the following technical solution: It includes a storage tank body and an installation box mounted on the top of the storage tank body via a mounting bracket. A sealing cover is provided at the outlet of the top of the storage tank body. A transmission gear is rotatably mounted inside the installation box. A connecting rod is threadedly mounted on the bottom of the transmission gear. A threaded rod is fixedly mounted on the bottom of the transmission gear. A threaded sleeve is fixedly mounted on the top of the connecting rod. The threaded rod and the threaded sleeve are threaded together. A balance tube is abutted and mounted on the bottom of the connecting rod. One end of the balance tube extends into the interior of the storage tank body. An air bladder is fixedly mounted on the balance tube and the outside of the connecting rod. A plug is fixedly mounted on the bottom of the connecting rod.

[0007] Optionally, the mounting bracket is fixedly installed between the mounting bracket and the mounting box, and the top of the storage tank body is provided with a mounting groove that cooperates with the mounting bracket.

[0008] Optionally, a motor is fixedly installed on one side of the mounting box, and a driven gear is fixedly installed on the output end of the motor, with the driven gear meshing with the transmission gear.

[0009] Optionally, a limiting frame is fixedly installed inside the mounting box, and a movable groove is provided on the outer side of the connecting rod. The inner side of the limiting frame is slidably installed between the movable groove and the movable groove.

[0010] Optionally, the balance tube extends through the interior of the sealing cover, and a pressure gauge is installed outside the sealing cover between the air pump and the sealing cover.

[0011] Optionally, the plug head is inverted conical in shape and can extend to the top of the balance tube for sealing. The outside of the mounting box is fixedly equipped with a protective cover that cooperates with the drive gear and the driven gear.

[0012] Optionally, the airbag is provided with an outlet tube extending out of the mounting box on its outer side.

[0013] In summary, this application includes the following beneficial technical effects: This invention, by incorporating components such as a threaded rod, a threaded sleeve, a connecting rod, and a plug, allows the driven gear to rotate via the rotation of the motor output. The threaded engagement between the driven gear and the transmission gear enables the threaded rod to rotate synchronously. The threaded engagement between the threaded rod and the threaded sleeve allows the connecting rod to move up and down under the limiting action of the limiting frame, thus enabling adjustment of the connecting rod. This facilitates convenient control of the connection between the connecting rod and the balance pipe, and allows for easy opening and closing of the plug and the balance pipe. When the pressure inside the storage tank increases, the balance pipe separates from the plug, releasing excess gas; when the pressure inside the storage tank decreases, the plug closes with the balance pipe to prevent external gas from entering, thereby conveniently controlling the hydraulic balance inside the storage tank.

[0014] This invention, by setting up components such as an airbag, an outlet pipe, and an air pump, allows the air pump to draw gas from inside the storage tank during the separation of the plug and the balance pipe, and introduce it into the airbag for storage. The gas inside the airbag is then connected to an external gas storage device through the outlet pipe. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the first appearance in the embodiments of this application; Figure 2 This is a three-dimensional structural diagram of the second appearance in the embodiments of this application; Figure 3 This is a schematic diagram of the internal three-dimensional structure of the mounting box in an embodiment of this application; Figure 4 This is a three-dimensional structural diagram of the installation of the transmission gear and the driven gear in an embodiment of this application; Figure 5 This is a three-dimensional schematic diagram of the installation of the balance tube and the plug head in an embodiment of this application.

[0016] Reference numerals in the attached drawings: 1. Tank body; 101. Mounting bracket; 102. Sealing cover; 103. Mounting groove; 2. Mounting box; 201. Motor; 202. Transmission gear; 203. Air pump; 204. Driven gear; 205. Threaded rod; 206. Threaded sleeve; 207. Connecting rod; 208. Limiting bracket; 209. Movable groove; 210. Balance pipe; 211. Airbag; 212. Outlet pipe; 213. Plug head. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1 - Figure 5 This application will be described in further detail.

[0018] This application discloses a gas-liquid self-balancing sealing structure for a vanadium battery electrolyte storage tank. For example... Figure 1 and Figure 4 As shown, the storage tank includes a tank body 1 and an installation box 2 mounted on the top of the tank body 1 via an installation bracket 101. A sealing cover 102 is provided at the outlet of the top of the tank body 1. A transmission gear 202 is rotatably mounted inside the installation box 2. A connecting rod 207 is threadedly mounted on the bottom of the transmission gear 202. A threaded rod 205 is fixedly mounted on the bottom of the transmission gear 202. A threaded sleeve 206 is fixedly mounted on the top of the connecting rod 207. The threaded rod 205 and the threaded sleeve 206 are threadedly connected. During the rotation of the transmission gear 202, the threaded rod 205 and the threaded sleeve 206 are threadedly engaged, causing the threaded sleeve 206 to move up and down.

[0019] Please see Figure 2 and Figure 4 The mounting bracket 101 is fixedly installed between the mounting bracket 101 and the mounting box 2. The top of the storage tank body 1 is provided with a mounting groove 103 that cooperates with the mounting bracket 101. The mounting bracket 101 can be limited by the mounting groove 103. The mounting bracket 101 supports the mounting box 2 to ensure the stability of the device during use. A motor 201 is fixedly installed on one side of the mounting box 2. A driven gear 204 is fixedly installed at the output end of the motor 201. The driven gear 204 and the transmission gear 202 are meshed. The rotation of the output end of the motor 201 can make the driven gear 204 and the transmission gear 202 mesh, thereby enabling the threaded rod 205 and the threaded sleeve 206 to be threadedly engaged.

[0020] Please see Figure 3 and Figure 5 The installation box 2 has a fixed mounting bracket 208 inside. The outer side of the connecting rod 207 is provided with a movable groove 209. The inner side of the mounting bracket 208 is slidably installed between the movable groove 209 and the inner side of the mounting bracket 208. The balance tube 210 passes through the interior of the sealing cover 102. A pressure gauge is provided on the outside of the sealing cover 102 between the air pump 203 and the sealing cover 102. The connecting rod 207 moves up and down under the limiting action of the mounting bracket 208, so that the connecting rod 207 can be adjusted up and down. This allows for convenient control of the connection between the connecting rod 207 and the balance tube 210, and facilitates the opening and closing operation between the plug head 213 and the balance tube 210.

[0021] Please see Figure 5The plug head 213 is inverted conical in shape and can extend to the top of the balance tube 210 for sealing. A protective cover that cooperates with the transmission gear 202 and the driven gear 204 is fixedly installed on the outside of the mounting box 2. An outlet pipe 212 extending out of the mounting box 2 is provided on the outside side of the airbag 211. When the pressure inside the tank body 1 increases, the balance tube 210 and the plug head 213 separate to release excess gas. When the pressure inside the tank body 1 decreases, the plug head 213 and the balance tube 210 close to prevent external gas from entering, thereby facilitating the control of the hydraulic balance inside the tank body 1.

[0022] Please see Figure 4 and Figure 5 A balance tube 210 is installed at the bottom of the connecting rod 207. One end of the balance tube 210 extends into the interior of the storage tank body 1. An air bladder 211 is fixedly installed on the balance tube 210 and the outside of the connecting rod 207. A plug head 213 is fixedly installed at the bottom of the connecting rod 207. During the process of separating the plug head 213 from the balance tube 210, the air pump 203 can draw gas from the interior of the storage tank body 1 through the balance tube 210 and introduce it into the interior of the air bladder 211 for storage. The gas inside the air bladder 211 is connected to an external gas storage device through the outlet tube 212.

[0023] The implementation principle of the gas-liquid self-balancing sealing structure of a vanadium battery electrolyte storage tank according to an embodiment of this application is as follows: During use, the sealing cover 102 is installed on the top of the storage tank body 1 for sealing. Simultaneously, the mounting bracket 101 and mounting groove 103 are connected to install the mounting box 2. The rotation of the output end of the motor 201 causes the driven gear 204 to rotate. The threaded engagement between the driven gear 204 and the transmission gear 202 causes the threaded rod 205 to rotate synchronously. The threaded engagement between the threaded rod 205 and the threaded sleeve 206 allows the docking rod 207 to move up and down under the limiting action of the limiting bracket 208, thereby enabling the docking rod 207 to be adjusted vertically and conveniently controlled for docking. The connection between rod 207 and balance tube 210 allows for easy opening and closing of plug head 213 and balance tube 210. When the pressure inside the tank body 1 increases, balance tube 210 separates from plug head 213 to release excess gas. When the pressure inside the tank body 1 decreases, plug head 213 closes from balance tube 210 to prevent external gas from entering, thereby facilitating the control of hydraulic balance inside the tank body 1. During the separation process of plug head 213 and balance tube 210, air pump 203 can be used to draw gas from inside the tank body 1 through balance tube 210 and introduce it into the airbag 211 for storage. The gas inside the airbag 211 is connected to an external gas storage device through outlet tube 212.

[0024] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas-liquid self-balancing sealing structure of a vanadium battery electrolyte storage tank, comprising a storage tank body (1) and a mounting box (2) mounted on the top of the storage tank body (1) through a mounting frame (101), characterized in that: A sealing cap (102) is provided at the outlet of the top of the storage tank body (1). A transmission gear (202) is rotatably installed inside the mounting box (2). A connecting rod (207) is threadedly installed at the bottom of the transmission gear (202). A threaded rod (205) is fixedly installed at the bottom of the transmission gear (202). A threaded sleeve (206) is fixedly installed at the top of the connecting rod (207). The threaded rod (205) and the threaded sleeve (206) are threadedly installed together. A balance tube (210) is connected to the bottom of the connecting rod (207). One end of the balance tube (210) extends into the interior of the storage tank body (1). An airbag (211) is fixedly installed on the outside of the balance tube (210) and the connecting rod (207). A plug (213) is fixedly installed at the bottom of the connecting rod (207).

2. The gas-liquid self-balancing seal structure of a vanadium battery electrolyte storage tank according to claim 1, characterized in that: The mounting bracket (101) is fixedly installed between the mounting box (2) and the top of the storage tank body (1) is provided with a mounting groove (103) that cooperates with the mounting bracket (101). 3.The gas-liquid self-balancing seal structure of a vanadium battery electrolyte storage tank according to claim 1, characterized in that: A motor (201) is fixedly installed on one side of the mounting box (2), and a driven gear (204) is fixedly installed at the output end of the motor (201). The driven gear (204) meshes with the transmission gear (202). 4.The gas-liquid self-balancing seal structure of a vanadium battery electrolyte storage tank according to claim 1, characterized in that: The mounting box (2) is fixedly installed inside a limiting frame (208), and the outside of the connecting rod (207) is provided with a movable groove (209). The inner side of the limiting frame (208) is slidably installed between the movable groove (209) and the inner side of the limiting frame (208). 5.The gas-liquid self-balancing seal structure of a vanadium battery electrolyte storage tank according to claim 1, characterized in that: The balance tube (210) penetrates the interior of the sealing cover (102), and a pressure gauge is provided on the outside of the sealing cover (102) between the air pump (203) and the sealing cover (102). 6.The gas-liquid self-balancing seal structure of a vanadium battery electrolyte storage tank according to claim 5, characterized in that: The plug head (213) is inverted conical and can extend into the top of the balance tube (210) for sealing. The mounting box (2) is fixedly equipped with a protective cover that cooperates with the transmission gear (202) and the driven gear (204).

7. The gas-liquid self-balancing sealing structure of a vanadium battery electrolyte storage tank according to claim 1, characterized in that: The airbag (211) has an outlet tube (212) extending out of the mounting box (2) on its outer side.

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