Venting plug structure

Abstract

Ventilation screw plug structure belongs to ventilation structure technical field. Including screw plug body and screw plug cover, the screw plug body is formed in the middle of screw part and matching part cavity, the bottom of the cylinder is formed with oil hole, and the top of the oil hole is formed with small hole, the small hole is formed with first channel, the cylinder is formed with taper surface above the small hole, the cavity of the screw plug body is provided with spiral column, the top of the cavity is provided with air permeable sponge, the middle of the spiral column is formed with spiral column cavity which is communicated with the small hole, the spiral column is formed with spiral channel which is communicated with the cavity on the outer wall of the upper segment, the bottom of the spiral column and the taper surface are formed with gap which is communicated with the small hole and the cavity, the gap is formed with second channel. Advantage: the gas channel with multi-way blockage and turning is adopted, which can effectively block the overflow of flying oil drops and small oil drops while ensuring the pressure balance inside and outside the screw plug, avoiding the oil loss and improving the safety of equipment use.

Description

Technical Field

[0001] This utility model belongs to the field of ventilation structure technology, specifically relating to a ventilation screw plug structure. Background Technology

[0002] A vent plug is a precision connector that integrates venting and thread plugging functions. It is used to seal holes in equipment while maintaining airflow between the inside and outside of the equipment. The core function of a vent plug is "ventilation only, no liquid leakage." Ordinary vent plugs use only a small bend to connect the inside and outside, achieving pressure balance. However, during high-speed operation, more oil droplets splash inside the oil tank, and the internal temperature generally rises after long-term operation. This causes the splashed oil droplets to shrink and float inside the tank, while smaller droplets can easily leak through the bend, affecting operational safety, leading to oil shortages, and shortening the equipment's lifespan. The structure of the aforementioned ordinary vent plug is too simple; it can only block larger oil droplets, not smaller ones, thus severely limiting its application. In view of this, the applicant has made an advantageous design, and the technical solution described below arose from this background. Utility Model Content

[0003] The purpose of this invention is to provide a vent plug structure that can effectively prevent lubricating oil leakage and has high reliability.

[0004] The purpose of this utility model is achieved as follows: a venting screw plug structure includes a screw plug body and a screw plug cap disposed on the top of the screw plug body. The lower section of the screw plug body is cylindrical, the middle section is a helical part, and the upper section is a mating part. The screw plug body forms a cavity between the helical part and the mating part. An oil drip hole is formed at the bottom of the cylinder, and a small hole is formed at the top of the oil drip hole, which constitutes a first channel. The cylinder extends above the small hole to form a conical surface. A helical column is disposed within the cavity of the screw plug body, and a breathable sponge is disposed at the top of the cavity. A helical column cavity communicating with the small hole is formed in the middle of the helical column. The helical column is located on the outer wall of the upper section. The screw plug has spiral channels that communicate with the cavity at intervals. A gap is formed between the bottom of the spiral column and the conical surface, which connects the small hole and the cavity. This gap forms a second channel. The spiral channels form a third channel. The screw plug cover has plug cover channels formed at intervals on its side wall. The screw plug body has a flange on its outer side wall corresponding to the top of the spiral part. An air outlet is formed between the flange and the bottom of the screw plug cover, which communicates with the plug cover channels. The air outlet communicates with the outside. The gap between the top inner wall of the screw plug cover and the upper surface of the breathable sponge communicates with the plug cover channels and together with the air outlet forms a fourth channel. The flange has a groove formed at the bottom, and a sealing ring is fitted in the groove.

[0005] In a specific embodiment of this utility model, the screw plug body has a step on the inner wall of the cavity, and the bottom of the upper section with the spiral channel is supported on the step.

[0006] In another specific embodiment of this utility model, the number of spiral channels is not less than two turns.

[0007] In another specific embodiment of this utility model, the breathable sponge is pressed and fixed by the screw cap.

[0008] In another specific embodiment of the present invention, the screw plug body has a groove extending in the circumferential direction on the outer side wall of the mating part, and the screw plug cover has a protruding ridge on the inner side wall that is adapted to the groove for installation.

[0009] Because of the above-mentioned structure, this utility model has a first, second, third and fourth channel, and adopts a multi-path blocking and deflecting gas channel. It can effectively block splashing oil droplets and the overflow of smaller oil droplets while ensuring the pressure balance inside and outside the screw plug, thereby avoiding oil loss, improving the safety of equipment use, and extending the service life of the equipment. Attached Figure Description

[0010] Figure 1 This is a front sectional view of the present invention; Figure 2 This is a side sectional view of the present invention.

[0011] In the diagram: 1. Plug body, 11. Cylindrical part, 111. Oil drip hole, 112. Small hole, 113. Conical surface, 114. Gap, 12. Spiral part, 121. Step, 122. External thread, 13. Mating part, 131. Groove, 14. Cavity, 15. Flange, 151. Slot; 2. Plug cap, 21. Plug cap channel, 22. Raised ridge; 3. Spiral column, 31. Spiral column cavity, 32. Spiral channel; 4. Breathable sponge; 5. Air outlet; 6. Sealing ring. Detailed Implementation

[0012] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0013] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model.

[0014] Please seeFigure 1 and Figure 2 This utility model relates to a venting plug structure, including a plug body 1. The lower section of the plug body 1 is a cylinder 11, the middle section is a helical part 12, and the upper section is a mating part 13. The cylinder 11 extends into the oil tank and is connected and fixed to the oil tank through the helical part 12. An external thread 122 is formed on the outer side wall of the helical part 12. A plug cap 2 is provided on the mating part 13 to seal the top of the plug body 1. A groove 131 extending in the circumferential direction is formed on the outer side wall of the mating part 13. A protrusion 22 corresponding to the groove 131 is formed on the inner side wall of the plug cap 2. The plug cap 2 is connected to the plug body 1 by the cooperation of the protrusion 22 and the groove 131.

[0015] The plug body 1 forms a through cavity 14 between the helical portion 12 and the mating portion 13. A drip hole 111 is formed at the bottom of the cylinder 11, and a small hole 112 communicating with the cavity 14 is formed at the top of the drip hole 111. The diameter of the small hole 112 is preferably 3-5 mm, and this small hole 112 constitutes a first channel. The cylinder 11 extends above the small hole 112 to form a conical surface 113. A helical column 3 is disposed within the cavity 14 of the plug body 1, and a breathable sponge 4 is disposed at the top of the cavity 14. The breathable sponge 4 is pressed and fixed by the plug cap 2 to prevent dust particles from entering the interior of the plug body 1. A helical column cavity 31 communicating with the small hole 112 is formed in the middle of the helical column 3. Helical channels 32 are formed at intervals on the upper outer wall of the helical column 3. The number of helical channels 32 is not less than two turns; the more turns, the easier it is for smaller oil droplets to be captured by collision with the outer wall of the helical channels 32. The screw plug body 1 has a step 121 on the inner wall of the cavity 14. The upper bottom of the spiral column 3, which has a spiral channel 32, is supported on the step 121, so that a gap 114 is formed between the bottom of the spiral column 3 and the conical surface 113, which connects the cavity 14 and the small hole 112. This gap 114 constitutes a second channel and connects the cavity 14, the spiral channel 32, and the small hole 112. The spiral channel 32 constitutes a third channel. The screw plug cover 2 has a stopper channel 21 formed at intervals on its side wall. The screw plug body 1 has a flange 15 on its outer side wall corresponding to the top of the spiral part 12. An air outlet 5 is formed between the flange 15 and the bottom of the screw plug cover 2, which communicates with the stopper channel 21. The air outlet 5 communicates with the outside. The gap between the top inner wall of the screw plug cover 2 and the upper surface of the breathable sponge 4 connects the stopper channel 21 and together with the air outlet 5, constitutes a fourth channel. The flange 15 has a groove 151 at the bottom, and a sealing ring 6 is installed in the groove 151 to seal the connection between the screw plug body 1 and the oil tank to prevent oil leakage.

[0016] In operation, the larger oil droplets splashed by this invention flow back to the oil tank due to the obstruction of the cylinder 11. Smaller oil droplets enter the screw plug body 1 through the drip hole 111 and then through the small hole 112. The smaller oil droplets entering the screw plug body 1 are mainly high-temperature oil vapor, which tends to rise easily. The spiral column cavity 31 of the spiral column 3 slows down the rising speed of the smaller oil droplets. The smaller oil droplets enter the spiral channel 32 of the spiral column 3 through the gap 114. The oil droplets captured by the spiral channel 32 flow back to the oil tank with the channel. The conical surface 113 prevents the backflowing oil droplets from accumulating inside the screw plug body 1.

[0017] Furthermore, this invention forms first, second, third, and fourth channels and adopts a multi-path blocking and deflecting gas channel, which ensures the pressure balance inside and outside the screw plug while effectively blocking the overflow of splashing oil droplets and smaller oil droplets, thus achieving the purpose of the invention.

Claims

1. A venting plug structure, comprising a plug body (1) and a plug cap (2) disposed on the top of the plug body (1), wherein the lower section of the plug body (1) is configured as a cylinder (11), the middle section is configured as a helical portion (12), and the upper section is configured as a mating portion (13), wherein the plug body (1) forms a cavity (14) between the helical portion (12) and the mating portion (13), characterized in that: The cylinder (11) has an oil drip hole (111) at its bottom, and a small hole (112) is formed at the top of the oil drip hole (111), which forms a first channel. The cylinder (11) extends above the small hole (112) to form a conical surface (113). A spiral column (3) is provided in the cavity (14) of the screw plug body (1). A breathable sponge (4) is provided at the top of the cavity (14). A spiral column cavity (31) communicating with the small hole (112) is formed in the middle of the spiral column (3). Spiral channels (32) communicating with the cavity (14) are formed at intervals on the upper outer wall of the spiral column (3). A gap communicating with the small hole (112) and the cavity (14) is formed between the bottom of the spiral column (3) and the conical surface (113). 114), the gap (114) constitutes the second channel, the spiral channel (32) constitutes the third channel, the screw plug cover (2) has a plug cover channel (21) spaced on the side wall, the screw plug body (1) has a flange (15) on the outer side wall corresponding to the top of the spiral part (12), the flange (15) and the bottom of the screw plug cover (2) form an air outlet (5) communicating with the plug cover channel (21), the air outlet (5) communicates with the outside, the gap between the top inner wall of the screw plug cover (2) and the upper surface of the breathable sponge (4) communicates with the plug cover channel (21) and together with the air outlet (5) constitutes the fourth channel, the flange (15) has a groove (151) formed at the bottom, and a sealing ring (6) is fitted in the groove (151).

2. The venting screw plug structure according to claim 1, characterized in that: The screw plug body (1) has a step (121) on the inner wall of the cavity (14), and the upper bottom of the helical column (3) with a helical channel (32) is supported on the step (121).

3. The venting screw plug structure according to claim 1, characterized in that: The number of spiral channels (32) is no less than two turns.

4. The vent plug structure according to claim 1, characterized in that: The breathable sponge (4) is pressed and fixed by the screw cap (2).

5. The vent plug structure according to claim 1, characterized in that: The screw plug body (1) has a groove (131) extending in the circumferential direction on the outer side wall of the mating part (13), and the screw plug cover (2) has a protrusion (22) on the inner side wall that is adapted to be installed in the groove (131).

Images