Liquid leakage-proof fresh food transportation box drain valve

Abstract

This utility model relates to the technical field of drainage valves for fresh produce transport boxes, and discloses a leak-proof drainage valve for fresh produce transport boxes, including a box body. A drain pipe is fixedly connected to the side wall of the box body, and a drainage valve body is disposed on the side wall of the drain pipe. A valve ball is rotatably connected inside the drainage valve body, and a valve stem is fixedly connected to the top of the valve ball. A valve switch is fixedly connected to the outer wall of the valve stem. A sealing assembly is disposed inside the drainage valve body, and a connecting assembly is disposed on the outer wall of the drainage valve body. The sealing assembly includes a fixing block and a rubber sleeve. The outer wall of the fixing block is fixedly connected to the inside of the drainage valve body, and the outer wall of the rubber sleeve is slidably connected to the inside of the fixing block. The fixing block and the valve ball are in contact. In this utility model, when the valve switch is turned on, causing the valve stem to drive the valve ball to complete the closing action, the spring, by its own elastic force, can push the rubber sleeve to tightly fit the surface of the valve ball, achieving a reliable leak-proof effect.

Description

Technical Field

[0001] This utility model relates to the technical field of drainage valves for fresh food transport boxes, and in particular to a leakage-proof drainage valve for fresh food transport boxes. Background Technology

[0002] During the transportation of fresh produce, ice packs or other moisturizing measures are usually placed inside the transport box to maintain freshness. This can lead to condensation or melted liquid inside the box. If the liquid cannot be drained in time, it can easily cause the fresh produce to soak and spoil. On the other hand, if the drainage structure has leakage problems, it will pollute the transportation environment and increase transportation losses. Therefore, a leak-proof drain valve for fresh produce transport boxes has become a key component in the fresh produce logistics field. It needs to take into account both effective drainage function and reliable leak-proof performance to adapt to the complex working conditions during transportation and ensure the quality of fresh produce transportation and the cleanliness of the transportation process.

[0003] Most existing fresh produce transport boxes use simple flip-top or plug-in drainage devices. Flip-top drainage devices typically have a hinged cover at the bottom of the side wall of the transport box, which closes by its own weight or a simple snap-fit. The cover can be manually lifted to drain water. Plug-in drainage devices have drainage holes in the box wall, which are sealed by inserting a rubber or plastic plug. The plug is removed to drain water. The technical principle of these devices is based on mechanical blocking or simple plugging. The cover or plug directly contacts the drainage hole to form a seal. There is no special elastic sealing reinforcement structure, nor is there a convenient disassembly and assembly mechanism designed for the connection parts.

[0004] In practical use, existing drainage devices for fresh produce transport boxes are prone to loosening or displacement due to unavoidable external vibrations and road bumps during transportation. For example, the latches of flip-top devices may come loose due to vibration, leading to an increased gap between the cover and the drainage hole; the plug of plug-in devices may shift, preventing a tight seal. Ultimately, this results in liquid leakage when the drainage device is not draining. This problem not only causes liquid loss from the transport box and affects the moisturizing effect of fresh produce, but also contaminates the transport vehicle, increasing subsequent cleaning costs and transportation losses. Therefore, a leak-proof drainage valve for fresh produce transport boxes is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a leak-proof drain valve for fresh food transport boxes, which aims to improve the problem of liquid leakage caused by poor sealing of the sealing surface due to external vibration, transportation bumps and other factors after the traditional drain valve is closed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a leak-proof fresh food transport box drain valve, comprising a box body, a drain pipe fixedly connected to the side wall of the box body, a drain valve body provided on the side wall of the drain pipe, a valve ball rotatably connected inside the drain valve body, a valve stem fixedly connected to the top of the valve ball, a valve switch fixedly connected to the outer wall of the valve stem, a sealing component provided inside the drain valve body, and a connecting component provided on the outer wall of the drain valve body;

[0007] The sealing assembly includes a fixing block and a rubber sleeve. The outer wall of the fixing block is fixedly connected to the inside of the drain valve body, and the outer wall of the rubber sleeve is slidably connected to the inside of the fixing block. The fixing block and the valve ball are in contact. A spring is provided inside the fixing block. One end of the spring is fixedly connected to the inside of the fixing block, and the other end of the spring is fixedly connected to the side wall of the rubber sleeve.

[0008] As a further description of the above technical solution:

[0009] The connecting assembly includes an upper locking block and a lower locking block. The upper locking block is sleeved on the outer wall of the drain pipe and the drain valve body, and the outer wall of the lower locking block is sleeved on the outer wall of the drain pipe and the drain valve body. A sealing ring is sleeved inside the drain pipe.

[0010] As a further description of the above technical solution:

[0011] A connecting block is fixedly connected to the bottom of the upper card block, and a card hole is opened inside the connecting block.

[0012] As a further description of the above technical solution:

[0013] A hollow block is fixedly connected to the outer wall of the lower block, and a slot is opened inside the lower block, with the connecting block and the slot fitting together.

[0014] As a further description of the above technical solution:

[0015] A pull rod is slidably connected inside the hollow block, and a limiting block is fixedly connected to the side wall of the pull rod.

[0016] As a further description of the above technical solution:

[0017] The outer wall of the limiting block is slidably connected to the inside of the lower locking block, and the limiting block and the locking hole are engaged.

[0018] As a further description of the above technical solution:

[0019] One end of the pull rod is fixedly connected to a limiting ring, and the outer wall of the limiting ring is slidably connected inside the hollow block.

[0020] As a further description of the above technical solution:

[0021] A second spring is fitted on the outer wall of the pull rod. One end of the second spring is fixedly connected to the side wall of the limiting ring, and the other end of the second spring is fixedly connected to the inside of the hollow block.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, when the valve switch is turned on and the valve stem drives the valve ball to complete the closing action, the spring can push the rubber sleeve to fit tightly against the surface of the valve ball by its own elastic force, so as to achieve a reliable anti-leakage effect. This solves the problem of liquid leakage caused by poor sealing surface due to external vibration, transportation bumps and other factors after the traditional drain valve is closed, and improves the sealing stability of the drain valve in the fresh food transportation scenario.

[0024] 2. In this utility model, when connecting the drain valve body and the drain pipe, first align the two precisely, then fasten the upper and lower locking blocks onto the outer wall of the connection point. By pulling the lever, the limiting ring can squeeze the second spring. At this time, bring the upper and lower locking blocks closer to each other so that the connecting block at the bottom of the upper locking block is precisely inserted into the slot of the lower locking block. Then release the lever, and the second spring will release its elastic force, causing the limiting block to be inserted into the locking hole of the connecting block, thus forming a stable connection and fixing structure. At the same time, the sealing ring inside the drain pipe can further enhance the sealing of the connection point and prevent liquid leakage. This solves the problem that traditional drain valves and pipes require tools, are cumbersome to operate, and have low disassembly and assembly efficiency, thus improving the convenience of drain valve installation and maintenance. Attached Figure Description

[0025] Figure 1 A three-dimensional schematic diagram of a leak-proof drain valve for a fresh produce transport box proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the main body of the drain valve of a leak-proof fresh food transport box proposed in this utility model.

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the drain pipe structure of a leak-proof fresh food transport box drain valve proposed in this utility model.

[0029] Figure 5 This is a schematic diagram of the lower locking block of a leak-proof fresh food transport box drain valve proposed in this utility model;

[0030] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0031] Legend:

[0032] 1. Housing; 2. Drain pipe; 3. Drain valve body; 4. Valve switch; 5. Valve stem; 6. Valve ball; 7. Fixing block; 8. Rubber sleeve; 9. Spring 1; 10. Sealing ring; 11. Upper locking block; 12. Lower locking block; 13. Connecting block; 14. Locking hole; 15. Hollow block; 16. Locking groove; 17. Pull rod; 18. Limiting block; 19. Limiting ring; 20. Spring 2. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-3This utility model provides an embodiment of a leak-proof drain valve for a fresh produce transport box, comprising a box body 1. The box body 1 serves as a container for fresh produce, providing a closed transport space to prevent contamination of the products by external impurities during transport. It also provides a stable installation base for a drain pipe 2, ensuring a clean transport environment for the fresh produce. A drain pipe 2 is fixedly connected to the side wall of the box body 1, serving as a discharge channel for liquids within the box, such as condensate and melted ice pack water. This, combined with the drain valve body 3, enables controlled liquid discharge, effectively draining accumulated liquids and preventing the fresh produce from soaking and spoiling. The drain valve body 3 is mounted on the side wall of the drain pipe 2. The drain valve body 3 is a ball valve, serving as the core component for drainage control. It houses a valve ball 6, sealing components, and other structures, providing installation and movement space for each component. The rotation of the valve ball 6 opens and closes the drainage channel. The valve ball 6 is rotatably connected inside the drain valve body 3, acting as the opening and closing element of the drainage channel. Its rotation alters the contact between the valve ball 6 and the sealing components. In the closed state, when the valve ball 6 rotates to fit with the sealing component, it blocks the drainage channel; when it rotates to disengage from the sealing component, it opens the drainage channel. This, combined with the transmission of the valve stem 5, enables convenient control. The valve stem 5 is fixedly connected to the top of the valve ball 6. The valve stem 5 serves as a force transmission component, transmitting the operating force of the valve switch 4 to the valve ball 6, causing the valve ball 6 to rotate synchronously. This, combined with the valve switch 4, enables the connection between human operation and the movement of the valve ball 6. The valve switch 4 is fixedly connected to the outer wall of the valve stem 5. The valve switch 4 serves as a force application component for the operator, increasing the contact area between the hand and the valve stem 5, making it easier for the operator to rotate the valve stem 5 by operating it. The drain valve body 3 has a sealing component inside, which enhances the sealing performance of the drain valve in the closed state to prevent liquid leakage. This, combined with the closing action of the valve ball 6, provides double sealing protection. The drain valve body 3 has a connecting component on its outer wall, which securely connects the drain valve body 3 to the drain pipe 2. This also facilitates later disassembly and maintenance. This, combined with the sealing ring 10, enhances the sealing performance at the connection, achieving a balance between connection stability and ease of disassembly and assembly.

[0035] The sealing assembly includes a fixing block 7 and a rubber sleeve 8. The fixing block 7 serves as the mounting base for the sealing assembly, fixing the spring 9 and providing a sliding guide for the rubber sleeve 8. It works in conjunction with the contact action between the rubber sleeve 8 and the valve ball 6 to achieve a seal, providing stable support for the sealing structure. The outer wall of the fixing block 7 is fixedly connected inside the drain valve body 3. This fixing method ensures the stability of the fixing block 7 within the drain valve body 3, preventing displacement due to transportation vibrations. The sliding movement of the rubber sleeve 8 ensures the operational stability of the sealing assembly. The outer wall of the rubber sleeve 8 is slidably connected inside the fixing block 7. The rubber sleeve 8, as a sealing element directly in contact with the valve ball 6, tightly conforms to the surface of the valve ball 6 through its own deformation, filling the gap between the valve ball 6 and the fixing block 7. The gap, combined with the elastic force of spring 9, enhances the sealing effect and prevents liquid leakage from the gap between valve ball 6 and fixed block 7. Fixed block 7 and valve ball 6 are in close contact, and rubber sleeve 8 can accurately contact valve ball 6 under the action of spring 9. With the sliding movement of rubber sleeve 8, the sealing position is ensured to be accurate. Spring 9 is set inside fixed block 7. One end of spring 9 is fixedly connected to the inside of fixed block 7, and the other end of spring 9 is fixedly connected to the side wall of rubber sleeve 8. Spring 9 is used as an elastic driving component to provide continuous elastic pressure to rubber sleeve 8, pushing rubber sleeve 8 to always be in close contact with valve ball 6. With the contact relationship between rubber sleeve 8 and valve ball 6, even if valve ball 6 is slightly displaced due to slight vibration, it can still maintain a tight seal.

[0036] Reference Figures 4-6The connecting assembly includes an upper locking block 11 and a lower locking block 12. Together, they form a ring-shaped connecting structure used to wrap and fix the connection between the drain pipe 2 and the drain valve body 3 from their outer walls. Combined with the interlocking relationship between the connecting block 13 and the slot 16, this enhances the stability of the connection structure. The upper locking block 11 is fitted onto the outer walls of the drain pipe 2 and the drain valve body 3, and the lower locking block 12 is fitted onto the outer walls of the drain pipe 2 and the drain valve body 3. This fitting method allows the upper locking block 11 and the lower locking block 12 to completely wrap the connection, preventing uneven local stress from causing loosening. The interlocking action of the two blocks tightly fixes the drain pipe 2 and the drain valve body 3. A sealing ring 10 is fitted inside the drain pipe 2, which is used to fill the gap between the drain pipe 2 and the drain valve body 3. The water valve body 3 has a connection gap. Its deformation seals the liquid leakage channel, and combined with the fixing action of the upper locking block 11 and the lower locking block 12, ensures the sealing of the connection and prevents liquid from leaking out from the connection gap. A connecting block 13 is fixedly connected to the bottom of the upper locking block 11. The connecting block 13 serves as a connecting component between the upper locking block 11 and the lower locking block 12. Initial positioning is achieved by embedding it into the locking groove 16 of the lower locking block 12. With the limiting structure of the locking groove 16, the upper locking block 11 and the lower locking block 12 are quickly aligned, improving installation efficiency. A locking hole 14 is provided inside the connecting block 13. The locking hole 14 engages with the limiting block 18, forming a secondary fixation between the upper locking block 11 and the lower locking block 12. Combined with the sliding movement of the limiting block 18, this prevents the connecting block 13 from detaching from the locking groove 16. To enhance connection stability, a hollow block 15 is fixedly connected to the outer wall of the lower locking block 12. The hollow block 15 serves as the mounting carrier for the pull rod 17 and spring 20, providing a closed movement space for these components to prevent external impurities from affecting their movement. Combined with the sliding structure of the pull rod 17, it ensures the operational stability of the connecting assembly. A slot 16 is provided inside the lower locking block 12, and the connecting block 13 engages with the slot 16. The slot 16 accommodates the connecting block 13, achieving initial fixation through shape matching. The engagement of the connecting block 13 restricts the relative displacement between the upper locking block 11 and the lower locking block 12. A pull rod 17 is slidably connected inside the hollow block 15. The pull rod 17 drives the limiting block 18 and the limiting ring 19 to slide synchronously. By pulling the pull rod... Rod 17 enables the disengagement or engagement of the limiting block 18 and the locking hole 14. Combined with the elastic reset action of spring 20, this achieves convenient locking and unlocking of the connecting component. A limiting block 18 is fixedly connected to the side wall of rod 17. The limiting block 18 is used to limit and fix the connecting block 13 by engaging with the locking hole 14. The structure of the locking hole 14 prevents the connecting block 13 from wobbling within the slot 16, ensuring the stability of the connecting component. The outer wall of the limiting block 18 is slidably connected inside the lower locking block 12. This sliding relationship ensures that the limiting block 18 is precisely aligned with the locking hole 14, preventing engagement failure due to movement deviation. Combined with the transmission of rod 17, this ensures the precise movement of the limiting block 18. The limiting block 18 and the locking hole 14 engage, achieving the final locking of the connecting component.The engagement of connecting block 13 and slot 16 achieves double fixation, preventing separation of upper and lower locking blocks 11 and 12. One end of pull rod 17 is fixedly connected to a limiting ring 19, whose outer wall is slidably connected inside hollow block 15. The limiting ring 19 restricts the sliding stroke of pull rod 17, preventing it from detaching from hollow block 15. It also provides a force support point for spring 20. The installation structure of spring 20 ensures the safety of pull rod 17's movement and the stability of spring 20's operation. Spring 20 is sleeved on the outer wall of pull rod 17, with one end fixedly connected to the side wall of limiting ring 19 and the other end fixedly connected inside hollow block 15. Spring 20 provides elastic restoring force for limiting ring 19 and pull rod 17. When pull rod 17 is released, it pushes limiting block 18 to automatically engage in locking hole 14. Combined with the pulling action of pull rod 17, this achieves automatic locking of the connecting components, improving operational convenience.

[0037] Working principle: When liquid accumulates in the transport box and the drain valve needs to be closed, the operator turns on valve switch 4. Valve switch 4 drives valve stem 5 to rotate synchronously. Valve stem 5 transmits the rotational force to valve ball 6 inside drain valve body 3, causing valve ball 6 to rotate to a position where it fits against the sealing component. At this time, spring 9 inside fixed block 7 in sealing component releases its elastic force, pushing rubber sleeve 8, which is slidably connected in fixed block 7, to move towards valve ball 6 until rubber sleeve 8 tightly fits against the surface of valve ball 6. Even if there is external vibration or bumps during transportation, spring 9 can still continuously provide elastic pressure to rubber sleeve 8, allowing rubber sleeve 8 to adjust synchronously with the slight displacement of valve ball 6, always maintaining a tight fit with valve ball 6, effectively sealing the gap between valve ball 6 and fixed block 7, preventing liquid leakage, and achieving a reliable leak-proof effect.

[0038] During installation, first precisely align the drain valve body 3 with the drain pipe 2. Then, place the upper locking block 11 and the lower locking block 12 onto the outer wall of their connection point. Pull the pull rod 17 inside the hollow block 15. The pull rod 17 drives the limiting ring 19 to compress the second spring 20, and simultaneously drives the limiting block 18 to slide to the appropriate position inside the lower locking block 12. Next, fasten the upper locking block 11 and the lower locking block 12 so that the connecting block 13 at the bottom of the upper locking block 11 is embedded in the slot 16 of the lower locking block 12 to complete the initial positioning. Then, release the pull rod 17, and the second spring 20 releases its elastic force to push the limiting ring 19 back to its original position. The limiting ring 19 drives the pull rod 17 and the limiting block 18 to slide, so that the limiting block 18 is inserted into the locking hole 14 of the connecting block 13, completing the secure connection between the two. At the same time, the sealing ring 10 inside the drain pipe 2 fills the connection gap to enhance the seal. When disassembling, simply pull the pull rod 17 to disengage the limiting block 18 from the locking hole 14 to separate the upper locking block 11 and the lower locking block 12, achieving quick disassembly and assembly.

Claims

1. A leak-proof drain valve for a fresh produce transport box, comprising a box body (1), characterized in that: A drain pipe (2) is fixedly connected to the side wall of the box (1). A drain valve body (3) is provided on the side wall of the drain pipe (2). A valve ball (6) is rotatably connected inside the drain valve body (3). A valve stem (5) is fixedly connected to the top of the valve ball (6). A valve switch (4) is fixedly connected to the outer wall of the valve stem (5). A sealing component is provided inside the drain valve body (3). A connecting component is provided on the outer wall of the drain valve body (3). The sealing assembly includes a fixing block (7) and a rubber sleeve (8). The outer wall of the fixing block (7) is fixedly connected to the inside of the drain valve body (3). The outer wall of the rubber sleeve (8) is slidably connected to the inside of the fixing block (7). The fixing block (7) and the valve ball (6) are in contact. A spring (9) is provided inside the fixing block (7). One end of the spring (9) is fixedly connected to the inside of the fixing block (7), and the other end of the spring (9) is fixedly connected to the side wall of the rubber sleeve (8).

2. The leak-proof drain valve for a fresh produce transport box according to claim 1, characterized in that: The connecting assembly includes an upper locking block (11) and a lower locking block (12). The upper locking block (11) is sleeved on the outer wall of the drain pipe (2) and the drain valve body (3). The outer wall of the lower locking block (12) is sleeved on the outer wall of the drain pipe (2) and the drain valve body (3). A sealing ring (10) is sleeved inside the drain pipe (2).

3. The leak-proof drain valve for a fresh produce transport box according to claim 2, characterized in that: The bottom of the upper card block (11) is fixedly connected to a connecting block (13), and the connecting block (13) has a card hole (14) inside.

4. The leak-proof drain valve for a fresh produce transport box according to claim 3, characterized in that: A hollow block (15) is fixedly connected to the outer wall of the lower locking block (12), and a slot (16) is opened inside the lower locking block (12). The connecting block (13) and the slot (16) are fitted together.

5. A leak-proof drain valve for a fresh produce transport box according to claim 4, characterized in that: A pull rod (17) is slidably connected inside the hollow block (15), and a limiting block (18) is fixedly connected to the side wall of the pull rod (17).

6. A leak-proof drain valve for a fresh produce transport box according to claim 5, characterized in that: The outer wall of the limiting block (18) is slidably connected to the inside of the lower locking block (12), and the limiting block (18) and the locking hole (14) are engaged.

7. A leak-proof drain valve for a fresh produce transport box according to claim 5, characterized in that: One end of the pull rod (17) is fixedly connected to a limiting ring (19), and the outer wall of the limiting ring (19) is slidably connected to the inside of the hollow block (15).

8. A leak-proof drain valve for a fresh produce transport box according to claim 7, characterized in that: The outer wall of the pull rod (17) is fitted with a second spring (20). One end of the second spring (20) is fixedly connected to the side wall of the limiting ring (19), and the other end of the second spring (20) is fixedly connected to the inside of the hollow block (15).

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