Sealing waterproof structure of captive screw and automatic feeding valve of sealing waterproof structure

Abstract

The utility model relates to a sealing waterproof structure of a captive screw and an automatic feeding valve of the captive screw, the sealing waterproof structure comprises the screw, the screw comprises a screw head, a screw rod and a screw tooth which are connected in sequence, the size of the screw tooth is larger than that of the screw rod, and the screw rod is sleeved with a sealing ring; the screw hole is internally provided with a step difference hole, the inner diameter of the step difference hole is smaller than the outer diameter of the thread, the side wall of the screw hole is further provided with a sealing groove, the sealing groove is matched with the sealing ring, and the sealing ring is clamped in the sealing groove when the screw is installed in the screw hole. The screw thread is blocked by the step differential hole in the screw inlet and outlet direction, so that the screw is still located in the screw hole after the shell is loosened and does not fall off, the screw is loosened but does not fall off in the disassembly process, the problem that the screw is prone to falling off after being loosened during disassembly when a product is connected with a machine thread screw is solved, and it is guaranteed that the screw and the screw hole are together and do not fall off. On the other hand, the problem that the conventional waterproof performance of the screw is poor is solved, and the waterproof sealing capacity of the screw structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve connection and waterproofing, in particular to a sealing waterproofing structure with screws that cannot be loosened and an automatic feeding valve thereof. Background Art

[0002] At present, the shell of the automatic feeding valve is locked by screws. During daily maintenance and replacement of parts, the shell needs to be opened to replace the internal structure. At this time, the screws used for locking on the shell are easy to fall directly from the cover during disassembly, which is inconvenient especially for high-altitude operations; the screws themselves are not waterproof after being locked, which can easily cause water to enter the equipment. Utility Model Content

[0003] The purpose of the utility model is to provide a sealing and waterproof structure of a screw that cannot be loosened and an automatic feeding valve thereof, so that the screw can be loosened without falling off during the disassembly process, and the problem that the machine screw connected to the product is easy to fall off after being twisted loose during disassembly is solved, and the screw is ensured to be together with the screw hole and will not fall off; on the other hand, the problem of poor conventional waterproofness of the screw is also solved, and the waterproof sealing ability of the screw structure is improved.

[0004] In order to achieve the above object, the utility model provides a sealing and waterproof structure with screws that cannot be loosened, comprising:

[0005] A screw, wherein the screw comprises a screw head, a screw rod and a screw thread connected in sequence, the size of the screw thread is larger than the size of the screw rod, and a sealing ring is sleeved on the screw rod;

[0006] A screw hole is provided with a step difference hole in the screw hole, the inner diameter of the step difference hole is smaller than the outer diameter of the screw thread, and a sealing groove facing the sealing ring is also provided on the side wall of the screw hole, the sealing groove matches the sealing ring, and the sealing ring is clamped in the sealing groove when the screw is installed in the screw hole.

[0007] Compared with the prior art, the utility model embodiment of a sealing and waterproof structure of a screw that cannot be loosened has the following beneficial effects: the screw includes a screw head, a screw rod and a screw thread, a sealing ring is sleeved on the screw rod, and a step-difference hole and a sealing groove are arranged in the screw hole. After the screw is inserted into the screw hole, the sealing ring is pressed into the sealing groove to close the gap between the screw and the screw hole, and prevent moisture from penetrating into the shell through the gap between the screw and the screw hole; the screw thread is blocked by the step-difference hole in the screw entry and exit direction, and cannot be directly removed after loosening the screw, so that the screw is still located in the screw hole after the shell is loosened and will not fall off, so that the screw can be loosened without falling off during the disassembly process, and the problem of the product connecting the machine thread screw being easy to fall off after being loosened during disassembly is solved, and the screw is ensured to be together with the screw hole and will not fall off; on the other hand, it also solves the problem of poor conventional waterproofness of the screw, and improves the waterproof sealing ability of the screw structure.

[0008] In the sealing and waterproof structure of the captive screw of the utility model embodiment, a cross groove or a slotted groove is arranged on the end surface of the screw head facing away from the screw rod.

[0009] In the sealing and waterproof structure of the captive screw of the utility model, a cross slot is provided at the step difference hole for the screw thread to pass through.

[0010] In the sealing and waterproof structure with captive screws of the embodiment of the utility model, the inner wall of the step difference hole is made of plastic material.

[0011] In the sealing and waterproof structure of the captive screw of the utility model embodiment, a chamfer is provided on the edge of one end of the screw thread away from the screw head, and a side end face of the screw thread close to the screw thread is arranged perpendicularly to the screw rod.

[0012] In the sealing and waterproof structure of the captive screws of the utility model embodiment, the sealing ring is made of rubber material.

[0013] In the sealing and waterproof structure of the captive screw of the utility model embodiment, a nut is arranged on the other side of the screw thread facing away from the screw hole, and a thread matching with the screw thread is arranged inside the nut.

[0014] In the sealing and waterproof structure of the non-loose screw of the embodiment of the utility model, the nut is made of hot-melt material.

[0015] The utility model also provides an automatic feeding valve, which adopts the sealing and waterproof structure with non-loose screws described in any one of the above embodiments to connect the cover plate that needs to be disassembled for maintenance.

[0016] The utility model embodiment provides an automatic feeding valve, which has the following beneficial effects: the automatic feeding valve includes a cover plate, which is connected and fixed by a captive screw, the screw includes a screw head, a screw rod and a screw thread, a sealing ring is sleeved on the screw rod, and a step-difference hole and a sealing groove are arranged in the screw hole. After the screw is inserted into the screw hole, the sealing ring is pressed into the sealing groove to close the gap between the screw and the screw hole, and prevent moisture from penetrating into the shell through the gap between the screw and the screw hole; the screw thread is blocked by the step-difference hole in the screw entry and exit direction, and cannot be directly removed after loosening the screw, so that the screw is still located in the screw hole after the shell is loosened and will not fall off, so that the screw can be loosened without falling off during the disassembly process, and the problem of the product being easy to fall off after being loosened when the machine thread screw is connected during disassembly is solved, and the screw is ensured to be together with the screw hole and will not fall off; on the other hand, it also solves the problem of poor conventional waterproofness of the screw, and improves the waterproof sealing ability of the screw structure.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a sealing and waterproof structure with screws that cannot be loosened according to an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the top view of the screw hole of the sealing and waterproof structure of the non-loose screw of the embodiment of the utility model;

[0020] In the figure, 1, screw; 11, screw head; 12, screw rod; 13, thread; 131, chamfer; 2, screw hole; 21, step difference hole; 22, sealing groove; 23, cross groove; 3, nut. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] like Figure 1 and Figure 2As shown, a sealing and waterproof structure of a screw that cannot be dislodged according to a preferred embodiment of the utility model comprises a screw 1, which is fixed in a screw hole 2. The screw 1 comprises a screw head 11, a screw rod 12 and a screw thread 13 connected in sequence. The size of the screw thread 13 is larger than the size of the screw rod 12. The screw rod 12 can move smoothly in the screw hole 2. A sealing ring 14 is sleeved on the screw rod 12. The inner diameter of the sealing ring 14 matches the outer diameter of the screw rod 12. The sealing ring 14 is made of soft material so that it can be deformed when pressing the edge of the screw hole 2 to improve the sealing ability and seal the space between the screw 1 and the screw hole 2. The gap is used to prevent moisture from penetrating into the shell through the gap between the screw 1 and the screw hole 2; a step difference hole 21 is provided in the screw hole 2, and the inner diameter of the step difference hole 21 is smaller than the outer diameter of the screw thread 13. The screw thread 13 is blocked by the step difference hole 21 in the entry and exit direction of the screw 1, and cannot be directly removed after loosening the screw 1, so that the screw 1 is still located in the screw hole 2 after the shell is loosened and will not fall off, so that the screw 1 can be loosened without falling off during the disassembly process, and the problem of the product being easy to fall off after being loosened when disassembly when the machine thread screw 1 is connected is solved, and the screw 1 is ensured to be together with the screw hole 2 and will not fall off.

[0026] A sealing groove 22 facing the sealing ring 14 is also provided on the side wall of the screw hole 2. The sealing groove 22 matches the sealing ring 14. When the screw 1 is installed in the screw hole 2, the sealing ring 14 is clamped in the sealing groove 22 to prevent moisture from penetrating into the shell through the gap between the screw 1 and the screw hole 2, thereby solving the problem of poor conventional waterproofness of the screw 1 and improving the waterproof sealing ability of the screw 1 structure.

[0027] In some embodiments of the utility model, a cross groove or a slotted groove is provided on the end surface of the screw head 11 facing away from the screw rod 12. The cross groove or the slotted groove of the screw head 11 facilitates the screw 1 to be loosened or tightened by twisting the slotted screw 1 or the cross screw 1, which is convenient and reliable.

[0028] In some embodiments of the utility model, a cross groove 23 is further provided at the step-difference hole 21 for the screw thread 13 to pass through, and the cross groove 23 is recessed toward the hole wall, so that the step-difference hole 21 allows the screw thread 13 to have a margin for shrinking inwards during the process of entering the screw hole 2. After receiving the force of the screw thread 13, the step-difference hole 21 will deform in the direction of the screw thread 13, increasing the passable area of ​​the step-difference hole 21, so that the screw thread 13 can smoothly enter the deep part of the screw hole 2. The provision of the cross groove 23 is conducive to the entry of the screw thread 13, and enhances the convenience of installing the screw 1.

[0029] In some embodiments of the present invention, the inner wall of the step-difference hole 21 is made of plastic material, and the inner wall of the step-difference hole 21 made of plastic material is easy to deform. When the screw thread 13 enters the screw hole 2 and is subjected to the force of the screw thread 13, it will deform toward the screw hole 2, thereby increasing the passable area of ​​the step-difference hole 21 and allowing the screw thread 13 to smoothly enter the deep part of the screw hole 2. The cross groove 23 is provided to facilitate the entry of the screw thread 13 and enhance the convenience of installing the screw 1.

[0030] In some embodiments of the present invention, the inner wall of the step difference hole 21 is provided with a cross groove 23 and is also made of plastic material.

[0031] In some embodiments of the present invention, a chamfer 131 is provided at the edge of one end of the screw thread 13 away from the screw head 11, and the chamfer 131 is provided in an annular manner at the head of the screw thread 13, so as to reduce the interference with the inner wall of the step difference hole 21 when entering the screw hole 2, and further facilitate the screw thread 13 to enter the inside of the step difference hole 21. The end surface of the screw thread 13 close to the screw thread 13 is vertically arranged with the screw rod 12, and the other end of the vertical arrangement directly abuts against the step difference hole 21 after the screw 1 is loosened, so as to prevent the screw thread 13 from loosening to the other side of the step difference hole 21, causing the screw 1 to be adjusted out of the screw hole 2.

[0032] In some embodiments of the present invention, the sealing ring 14 is made of soft materials such as rubber, which is easy to deform, thereby improving the sealing ability, closing the gap between the screw 1 and the screw hole 2, and preventing moisture from penetrating into the shell through the gap between the screw 1 and the screw hole 2.

[0033] In some embodiments of the utility model, a nut 3 is provided on the other side of the screw thread 13 facing away from the screw hole 2, and a thread matching the screw thread 13 is provided inside the nut 3, so that the screw thread 13 can be locked after passing through the thread step hole, thereby completing the locking of the shell and other components.

[0034] In some embodiments of the present invention, the nut 3 is made of hot-melt material.

[0035] The utility model also provides an automatic feeding valve, which adopts the sealing and waterproof structure of the captive screw 1 of any of the above embodiments to connect the cover plate that needs to be disassembled for maintenance. The automatic feeding valve includes a cover plate, which is connected and fixed by the captive screw 1, the screw 1 includes a screw head 11, a screw rod 12 and a screw thread 13, a sealing ring 14 is sleeved on the screw rod 12, and a step difference hole 21 and a sealing groove 22 are arranged in the screw hole 2. After the screw 1 is inserted into the screw hole 2, the sealing ring 14 is pressed into the sealing groove 22 to close the gap between the screw 1 and the screw hole 2 to prevent moisture from penetrating into the shell through the gap between the screw 1 and the screw hole 2; the screw thread 13 is blocked by the step difference hole 21 in the entry and exit direction of the screw 1, and cannot be directly removed after loosening the screw 1, so that the screw 1 is still located in the screw hole 2 after the shell is loosened and will not fall off, so that the screw 1 can be loosened without falling off during the disassembly process, and the problem that the product is connected with the machine thread screw 1 and is easy to fall off after being twisted loose during disassembly is solved, and the screw 1 is ensured to be together with the screw hole 2 and will not fall off; on the other hand, it also solves the problem of poor conventional waterproofness of the screw 1, and improves the waterproof sealing ability of the screw 1 structure.

[0036] The working process of the utility model is as follows: the screw 1 comprises a screw head 11, a screw rod 12 and a screw thread 13, a sealing ring 14 is sleeved on the screw rod 12, and a step-difference hole 21 and a sealing groove 22 are arranged in the screw hole 2. After the screw 1 is inserted into the screw hole 2, the sealing ring 14 is pressed into the sealing groove 22 to close the gap between the screw 1 and the screw hole 2; the screw thread 13 is blocked by the step-difference hole 21 in the direction of entry and exit of the screw 1, and cannot be directly taken out after loosening the screw 1, so that the screw 1 is still located in the screw hole 2 after the housing is loosened, and will not fall off, so that the screw 1 is loosened but not removed during the disassembly process.

[0037] In summary, the embodiments of the utility model provide a sealing and waterproof structure of a non-loose screw 1 and an automatic feeding valve thereof, which can realize that the screw 1 can be loosened without falling off during the disassembly process, thereby solving the problem that the product connected with the machine screw 1 is easy to fall off after being twisted loose during disassembly, and ensuring that the screw 1 is together with the screw hole 2 and will not fall off; on the other hand, it also solves the problem that the conventional waterproofness of the screw 1 is poor, and improves the waterproof sealing ability of the screw 1 structure.

[0038] The above are only preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A sealing and waterproof structure with screws that cannot be loosened, characterized in that: include: A screw, wherein the screw comprises a screw head, a screw rod and a screw thread connected in sequence, the size of the screw thread is larger than the size of the screw rod, and a sealing ring is sleeved on the screw rod; A screw hole is provided with a step difference hole in the screw hole, the inner diameter of the step difference hole is smaller than the outer diameter of the screw thread, and a sealing groove facing the sealing ring is also provided on the side wall of the screw hole, the sealing groove matches the sealing ring, and the sealing ring is clamped in the sealing groove when the screw is installed in the screw hole.

2. The sealing and waterproof structure with captive screws according to claim 1, characterized in that: A cross groove or a straight groove is arranged on an end surface of the screw head facing away from the screw rod.

3. The sealing and waterproof structure with captive screws according to claim 2, characterized in that: The step difference hole is also provided with a cross groove for the screw thread to pass through.

4. The sealing and waterproof structure with captive screws according to claim 2, characterized in that: The inner wall of the step difference hole is made of plastic material.

5. The sealing and waterproof structure with captive screws according to claim 2, characterized in that: The edge of one end of the screw thread away from the screw head is provided with a chamfer, and the end surface of one side of the screw thread close to the screw thread is arranged perpendicularly to the screw rod.

6. The sealing and waterproof structure with captive screws according to claim 1, characterized in that: The sealing ring is made of rubber.

7. The sealing and waterproof structure with captive screws according to claim 1, characterized in that: A nut is arranged on the other side of the screw thread facing away from the screw hole, and a thread matching with the screw thread is arranged inside the nut.

8. The sealing and waterproof structure with captive screws according to claim 7, characterized in that: The nut is made of hot-melt material.

9. An automatic feeding valve, characterized in that: The sealing and waterproof structure with captive screws as described in any one of claims 1 to 8 is used to connect a cover plate that needs to be disassembled for maintenance.

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