Locking device of explosion-proof pressure relief door and drying equipment

Abstract

The application relates to a locking device of an explosion-proof pressure relief door and a drying equipment. The locking device of the explosion-proof pressure relief door comprises a mounting block, a guide rod penetrating through the mounting block and being in sliding connection with the mounting block, a top pressing support arranged at one end of the guide rod, an abutting surface being arranged on the side of the top pressing support away from the guide rod, a limiting block arranged at the end of the guide rod away from the top pressing support, and an elastic piece arranged between the top pressing support and the mounting block, the elastic piece having an acting force for moving the top pressing support towards the direction away from the mounting block. The scheme provided by the application can improve the response speed of the action of the explosion-proof pressure relief door.

Description

Technical Field

[0001] This application relates to the field of lithium battery manufacturing, and in particular to a locking device and drying equipment for an explosion-proof pressure relief door. Background Technology

[0002] In the manufacturing process of lithium battery electrodes, the coated wet electrodes need to be dried at high temperatures in an oven to remove organic solvents. During this process, a large amount of volatile flammable gas can easily accumulate inside the oven due to solvent evaporation and the high-temperature environment. When the gas concentration reaches the explosive limit, it can easily cause a deflagration accident if it encounters a high-temperature heat source or an electrostatic spark. To ensure equipment safety, the oven is usually equipped with an explosion-proof pressure relief door, which reduces the risk of explosion by quickly releasing pressure when the internal pressure rises abnormally.

[0003] The explosion-proof pressure relief device used in related technologies mainly relies on the pressure relief door's own weight and the pressure difference between the inside and outside of the chamber to achieve the opening action. Specifically, the pressure relief door is kept in a sealed state under normal operating conditions by its own weight. When the pressure inside the oven exceeds a certain value, the pressure difference overcomes the pressure relief door's own weight, causing it to open and release pressure. After the pressure drops, it closes again by self-realignment.

[0004] However, the method of opening the pressure relief door by its own weight and pressure difference in related technologies is relatively slow to respond to pressure fluctuations inside the oven. Utility Model Content

[0005] To address or partially address the problems existing in related technologies, this application provides a locking device and drying equipment for an explosion-proof pressure relief door, which can improve the response speed of the explosion-proof pressure relief door.

[0006] The first aspect of this application provides a locking device for an explosion-proof pressure relief door, comprising: a mounting block; a guide rod passing through the mounting block and slidably connected to the mounting block; a top-pressure bracket disposed at one end of the guide rod, the top-pressure bracket having an abutment surface on the side opposite to the guide rod; a limiting block disposed at the end of the guide rod away from the top-pressure bracket; and an elastic element disposed between the top-pressure bracket and the mounting block, the elastic element having a force that causes the top-pressure bracket to move in a direction away from the mounting block.

[0007] Furthermore, the elastic element is a compression spring, which is sleeved on the guide rod. One end of the elastic element abuts against the top pressure bracket, and the other end of the elastic element abuts against the mounting block.

[0008] Furthermore, the guide rod has two parts, which are disposed opposite to each other on the mounting block. Each guide rod is connected to the top pressure bracket and the limiting block. Furthermore, the mounting block has a through-hole, through which the guide rod passes, and a bearing is fitted onto the guide rod within the through-hole.

[0009] Furthermore, the locking device of the explosion-proof pressure relief door also includes a support base, and the mounting block is disposed on the support base. The support base includes an angle seat and a diagonal brace. One end of the diagonal brace is connected to the angle seat. The upper surface of the diagonal brace has an inclined mounting surface. The mounting block is disposed on the mounting surface so that the guide rod is inclined toward the surface of the explosion-proof pressure relief door.

[0010] Furthermore, the locking device of the explosion-proof pressure relief door also includes a pressing member for being installed on the explosion-proof pressure relief door, the pressing member abutting against the contact surface of the top pressure bracket.

[0011] Furthermore, the surface of the pressing member that contacts the abutting surface is an arc-shaped surface or a plane inclined relative to the explosion-proof pressure relief door; and / or

[0012] The contact surface is arc-shaped or V-shaped.

[0013] Furthermore, the guide rod includes a first connecting section, an elastic section, and a second connecting section. The elastic section connects the first connecting section and the second connecting section. The end of the first connecting section away from the elastic section is connected to the top pressure bracket, and the end of the second connecting section away from the elastic section is connected to the limiting block; or

[0014] The guide rod includes a first connecting section, a screw, and a second connecting section. One end of the screw is detachably connected to the first connecting section, and the other end of the screw is detachably connected to the second connecting section. The end of the first connecting section away from the screw is connected to the top pressure bracket, and the end of the second connecting section away from the screw is connected to the limiting block.

[0015] Furthermore, the elastic segment is made of thermosetting polyurethane elastomer PU.

[0016] A second aspect of this application provides a drying apparatus, comprising: an oven, an explosion-proof pressure relief door, and a locking device for the explosion-proof pressure relief door as described in any of the preceding claims, wherein the explosion-proof pressure relief door and the locking device are both disposed in the oven.

[0017] The technical solution provided in this application can include the following beneficial results: An elastic element exerts a force on the top pressure bracket, causing it to move away from the mounting block. This force presses against the explosion-proof pressure relief door, keeping it sealed. When the internal pressure of the oven reaches a preset value, the explosion-proof pressure relief door can be opened quickly. By moving the top pressure bracket to overcome the elastic force of the elastic element, and after the pressure inside the oven decreases, the elastic element drives the top pressure bracket to move away from the mounting block, thus pushing the explosion-proof pressure relief door back to a sealed state. Compared to the method of relying on the pressure difference between the inside and outside of the oven and the door's own weight to open, overcoming the elastic force of the elastic element to open the door results in a faster response speed, thereby improving the response speed to pressure fluctuations inside the oven. Furthermore, the preload of the elastic element can be adjusted to precisely regulate the set pressure relief trigger pressure, adapting to the explosion-proof requirements of different processes.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0019] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0020] Figure 1 This is a schematic diagram of the locking device of the explosion-proof pressure relief door shown in the embodiments of this application;

[0021] Figure 2 This is a cross-sectional view of the locking device of the explosion-proof pressure relief door shown in the embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the guide rod structure shown in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of another guide rod structure shown in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of another guide rod shown in an embodiment of this application.

[0025] Reference numerals: 1-Support base, 11-Angle base, 12-Diagonal brace block, 2-Mounting block, 3-Guide rod, 311-First connecting section, 312-Elastic section, 313-Second connecting section, 321-First connecting section, 322-Screw, 323-Second connecting section, 4-Top pressure bracket, 41-Abutting surface, 5-Limiting block, 6-Elastic element, 7-Bearing, 8-Abutting element. Detailed Implementation

[0026] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0027] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 this application.

[0029] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In related technologies, explosion-proof pressure relief devices mainly rely on the pressure relief door's own weight and the pressure difference between the inside and outside of the chamber to achieve opening. Specifically, the pressure relief door maintains a sealed state under normal operating conditions through its own weight. When the internal pressure of the oven exceeds a certain value, the pressure difference overcomes the pressure relief door's own weight, causing it to open and release pressure. However, this method has the following drawbacks: 1. There is resistance between the explosion-proof pressure relief door and the door frame. Opening requires overcoming the door's weight and resistance, resulting in a slow opening speed and a delayed response to pressure fluctuations. It cannot open immediately when the pressure begins to rise; the explosion-proof pressure relief door can only open when the pressure accumulates to a certain level. 2. External pressure fluctuations interfere with the internal pressure. When the internal pressure is greater than the external pressure, the explosion-proof pressure relief door opens, but external pressure fluctuations affect the opening pressure of the explosion-proof pressure relief door.

[0031] To address the aforementioned issues, this application provides a locking device for an explosion-proof pressure relief door, which can improve the response speed of the pressure relief door, more accurately control the pressure relief trigger pressure, and reduce lag.

[0032] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0033] like Figures 1 to 3 As shown in the figure, this application provides a locking device for an explosion-proof pressure relief door, including a mounting block 2, a guide rod 3, a top pressure bracket 4, a limiting block 5, and an elastic element 6.

[0034] The guide rod 3 passes through the mounting block 2 and is slidably connected to the mounting block 2, meaning the guide rod 3 can slide relative to the mounting block 2. Figure 2 The guide rod 3 can move left and right relative to the mounting block 2. A top-pressure bracket 4 is located at one end of the guide rod 3, and the side of the top-pressure bracket 4 facing away from the guide rod 3 has an abutment surface 41 for abutting against the explosion-proof pressure relief door. A limiting block 5 is located at the end of the guide rod 3 away from the top-pressure bracket 4. The top-pressure bracket 4 and the limiting block 5 are located on the left and right sides of the mounting block 2. The limiting block 5 limits the maximum displacement of the guide rod 3 towards the top-pressure bracket 4, preventing the end of the guide rod 3 located at the limiting block 5 from detaching from the mounting block 2. An elastic element 6 is located between the top-pressure bracket 4 and the mounting block 2. The elastic element 6 exerts a force on the top-pressure bracket 4, causing it to move away from the mounting block 2. Figure 2 In the middle, the elastic element 6 exerts a leftward force on the top pressure bracket 4.

[0035] Based on the above scheme, the elastic element 6 exerts a force on the top pressure bracket 4, causing it to move away from the mounting block 2. This forces the top pressure bracket 4 to press against the explosion-proof pressure relief door, keeping it sealed. When the internal pressure of the oven reaches a preset value, the explosion-proof pressure relief door can be opened quickly. By moving the top pressure bracket 4 to overcome the elastic force of the elastic element 6, the pressure inside the oven decreases. The elastic element 6 then drives the top pressure bracket 4 to move away from the mounting block 2, thus pushing the explosion-proof pressure relief door back to a sealed state. Compared to the method of relying on the weight of the explosion-proof pressure relief door and the pressure difference between the inside and outside of the oven to open, the response speed of opening the explosion-proof pressure relief door by overcoming the elastic force of the elastic element 6 is faster, thereby improving the response speed to pressure fluctuations inside the oven. Furthermore, the preload of the elastic element 6 can be adjusted to precisely regulate the set pressure relief trigger pressure, making the opening threshold more accurate. It can also automatically reset, adapting to the explosion-proof requirements of different processes.

[0036] In some embodiments, the elastic element 6 is a compression spring, sleeved on the guide rod 3. One end of the elastic element 6 abuts against the top pressure bracket 4, and the other end abuts against the mounting block 2. Specifically, under normal operating conditions, the elastic element 6 is in a pre-compressed state, and the resulting elastic force causes the top pressure bracket 4 to press tightly against the explosion-proof pressure relief door, maintaining the door closed. When the internal pressure of the oven exceeds a set value, the pressure pushes the top pressure bracket 4, overcoming the elastic force of the elastic element 6, causing the elastic element 6 to compress further, thereby opening the pressure relief door to release pressure.

[0037] In some embodiments, such as Figure 1 As shown, there are two guide rods 3, which are positioned opposite each other on the mounting block 2. Each guide rod 3 is connected to the top pressure bracket 4 and to the limiting block 5. Specifically, the guide rods 3 serve to guide and transmit force. The two guide rods 3 are arranged parallel to each other on the mounting block 2, sharing the spring preload and pressure relief impact load, reducing stress concentration on a single guide rod 3 and extending its service life.

[0038] In some embodiments, such as Figure 2 As shown, the mounting block 2 has a through mounting hole, and the guide rod 3 passes through the mounting hole. A bearing 7 is fitted onto the guide rod 3 within the mounting hole. The bearing 7 can be a linear bearing or a sliding bearing. The mounting hole has grooves at both ends, each containing a bearing 7. The bearing 7 reduces the friction between the guide rod 3 and the mounting block 2, allowing the guide rod 3 to move smoothly in a linear fashion within the mounting block 2. This ensures efficient and stable force transmission, sensitive operation of the guide rod 3, and prevents jamming that could delay pressure release.

[0039] In some embodiments, such as Figure 1 and Figure 2As shown, the locking device of the explosion-proof pressure relief door also includes a support base 1, and a mounting block 2 is disposed on the support base 1. The support base 1 serves as a supporting and fixing component and can be fixedly connected to the oven. The mounting block 2 is fixedly connected to the support base 1. The support base 1 includes an angle bracket 11 and a diagonal brace 12. One end of the diagonal brace 12 is connected to the angle bracket 11. The upper surface of the diagonal brace 12 has an inclined mounting surface. The mounting block 2 is disposed on the mounting surface so that the guide rod 3 is inclined towards the surface of the explosion-proof pressure relief door. Specifically, during installation, by setting the guide rod 3 at an incline relative to the surface of the explosion-proof pressure relief door, the force transmission between the explosion-proof pressure relief door and the guide rod 3 is facilitated. The diagonal brace 12 supports the mounting block 2, and the angle bracket 11 is disposed at the top of the diagonal brace 12 to provide support for the mounting block 2, ensuring that the entire assembly maintains a stable structure during oven operation and pressure relief, so that each component can function normally. The diagonal brace 12 is fixed to the mounting block 2 by bolts, and the diagonal brace 12 is also fixed to the corner seat 11 by bolts, forming a triangular support structure to distribute impact loads and prevent the mounting block 2 from undergoing plastic deformation or fracture under high-frequency pressure relief impacts. The diagonal brace 12, as a reinforcing structure, extends the life of the locking device and provides additional support, making it suitable for devices with frequent pressure relief, dispersing stress during high-pressure impacts, and preventing deformation or displacement of the mounting block 2.

[0040] In some embodiments, such as Figure 2 As shown, the locking device of the explosion-proof pressure relief door also includes a pressing member 8 for installation on the explosion-proof pressure relief door, the pressing member 8 abutting against the contact surface 41 of the top pressure bracket 4. The explosion-proof pressure relief door transmits force between the pressing member 8 and the top pressure bracket 4.

[0041] In some embodiments, the surface of the pressing member 8 that contacts the contact surface 41 is an arc-shaped surface or a plane that is inclined relative to the explosion-proof pressure relief door. Thus, when the explosion-proof pressure relief door is opened, the pressing member 8 can slide relative to the contact surface 41, thereby driving the top pressure bracket 4 to overcome the elastic force of the elastic member 6. When the explosion-proof pressure relief door is closed, the elastic member 6 drives the top pressure bracket 4 to move, thereby causing the contact surface 41 to slide relative to the surface of the pressing member 8, and thus driving the explosion-proof pressure relief door to close.

[0042] In some embodiments, the contact surface 41 is arc-shaped or V-shaped to facilitate contact and relative sliding with components on the explosion-proof pressure relief door. When the explosion-proof pressure relief door is opened, the relevant components on it can slide relative to the contact surface 41, thereby driving the top pressure bracket 4 to move. Figure 2 The middle contact surface 41 is V-shaped, and a rounded corner is provided in the middle position.

[0043] In some embodiments, such as Figure 3 As shown, the guide rod 3 is a one-piece cylindrical structure, which is convenient for processing and manufacturing.

[0044] In some embodiments, such as Figure 4As shown, the guide rod 3 includes a first connecting section 311, an elastic section 312, and a second connecting section 313. The elastic section 312 is connected between the first connecting section 311 and the second connecting section 313. The end of the first connecting section 311 away from the elastic section 312 is connected to the top pressure bracket 4, and the end of the second connecting section 313 away from the elastic section 312 is connected to the limiting block 5. The elastic section 312 has a certain degree of elasticity and is located close to the top pressure bracket 4. It can play a role in shock absorption and buffering, preventing spring failure and rebound after impact bending, and can prevent metal fatigue fracture. It is suitable for repeated use scenarios.

[0045] In some embodiments, the elastic segment 312 is made of thermosetting polyurethane elastomer PU, that is, the elastic segment 312 is a PU rod. The PU rod has high elasticity, high toughness, high pressure load resistance, and can absorb impact energy.

[0046] In some embodiments, such as Figure 5 As shown, the guide rod 3 includes a first connecting section 321, a screw 322, and a second connecting section 323. One end of the screw 322 is detachably connected to the first connecting section 321, and the other end of the screw 322 is detachably connected to the second connecting section 323. The screw 322 is threadedly connected to both the first connecting section 321 and the second connecting section 323. The end of the first connecting section 321 away from the screw 322 is connected to the top pressure bracket 4, and the end of the second connecting section 323 away from the screw 322 is connected to the limiting block 5.

[0047] By installing a screw 322 near the top pressure bracket 4 on the guide rod 3, the screw 322 can serve as a final protection device when the elastic element 6 fails. After the screw 322 breaks, the guide rod 3 loses its restraint, and the pressure relief valve opens rapidly to release pressure. The screw 322 is easily installed and replaced by embedding it in the guide rod 3. If the screw 322 breaks, only the screw 322 needs to be replaced to restore system function, resulting in low maintenance costs.

[0048] This application also provides a drying device, including an oven, an explosion-proof pressure relief door, and a locking device for the explosion-proof pressure relief door as described in the above embodiments. Both the explosion-proof pressure relief door and the locking device are located in the oven.

[0049] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0050] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A locking device for an explosion-proof pressure relief door, characterized in that, include: Mounting block; The guide rod passes through the mounting block and is slidably connected to the mounting block; A top pressure bracket is provided at one end of the guide rod, and the side of the top pressure bracket opposite to the guide rod has an abutment surface; A limiting block is located at the end of the guide rod away from the top pressure bracket; and An elastic element is disposed between the top pressure bracket and the mounting block, and the elastic element has a force that causes the top pressure bracket to move away from the mounting block.

2. The locking device for the explosion-proof pressure relief door according to claim 1, characterized in that: The elastic element is a compression spring, which is sleeved on the guide rod. One end of the elastic element abuts against the top pressure bracket, and the other end of the elastic element abuts against the mounting block.

3. The locking device for the explosion-proof pressure relief door according to claim 1, characterized in that: The guide rod has two parts, which are disposed opposite to each other on the mounting block. The two guide rods are respectively connected to the top pressure bracket and the two guide rods are respectively connected to the limiting block.

4. The locking device for the explosion-proof pressure relief door according to claim 1, characterized in that: The mounting block has a mounting hole that penetrates the mounting block, the guide rod passes through the mounting hole, and a bearing is sleeved on the guide rod inside the mounting hole.

5. The locking device for the explosion-proof pressure relief door according to claim 1, characterized in that: It also includes a support base, and the mounting block is disposed on the support base. The support base includes an angle seat and a diagonal brace. One end of the diagonal brace is connected to the angle seat. The upper surface of the diagonal brace has an inclined mounting surface. The mounting block is disposed on the mounting surface so that the guide rod is inclined toward the surface of the explosion-proof pressure relief door.

6. The locking device for the explosion-proof pressure relief door according to claim 1, characterized in that: It also includes a pressure-blocking member for installation on the explosion-proof pressure relief door, the pressure-blocking member abutting against the contact surface of the top pressure bracket.

7. The locking device for the explosion-proof pressure relief door according to claim 6, characterized in that: The surface of the pressing member that contacts the abutting surface is an arc-shaped surface or a plane inclined relative to the explosion-proof pressure relief door; and / or The contact surface is arc-shaped or V-shaped.

8. The locking device for the explosion-proof pressure relief door according to claim 1, characterized in that: The guide rod includes a first connecting section, an elastic section, and a second connecting section. The elastic section connects the first connecting section and the second connecting section. The end of the first connecting section away from the elastic section is connected to the top pressure bracket, and the end of the second connecting section away from the elastic section is connected to the limiting block; or The guide rod includes a first connecting section, a screw, and a second connecting section. One end of the screw is detachably connected to the first connecting section, and the other end of the screw is detachably connected to the second connecting section. The end of the first connecting section away from the screw is connected to the top pressure bracket, and the end of the second connecting section away from the screw is connected to the limiting block.

9. The locking device for the explosion-proof pressure relief door according to claim 8, characterized in that: The elastic segment is made of thermosetting polyurethane elastomer (PU).

10. A drying device, characterized in that, include: An oven, an explosion-proof pressure relief door, and a locking device for the explosion-proof pressure relief door as described in any one of claims 1-9, wherein the explosion-proof pressure relief door and the locking device are both located in the oven.

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