CN216242545U

CN216242545U - Ventilating screw plug

Info

Publication number: CN216242545U
Application number: CN202122870116.9U
Authority: CN
Inventors: 袁聪; 王国清; 高峰; 施科伟
Original assignee: Suzhou Canghai Vacuum Machinery Co ltd
Current assignee: Suzhou Canghai Vacuum Machinery Co ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-04-08
Anticipated expiration: 2031-11-22

Abstract

A ventilation plug screw belongs to the technical field of ventilation structures. Including the plug screw body and set up the gag at plug screw body top, plug screw body lower extreme constitute for plug screw portion, the upper end constitutes for joining in marriage the portion, the die cavity of plug screw portion constitutes for first passageway, be equipped with the blade axle in the middle of the die cavity of joining in marriage the portion, epaxial along the direction of height interval of blade be provided with first blade group and second blade group, the vertical projection that overlaps and overlap back about first blade group and the second blade group covers the whole cross section of joining in marriage the portion die cavity, the clearance that forms is separated by first blade group and second blade group in the joining in marriage the portion die cavity constitutes for the second passageway, the clearance between the top inner wall of gag and the top end face of joining in marriage the portion constitute for the third passageway, the clearance between the inside wall of gag and the lateral wall of joining in marriage the portion constitutes for the fourth passageway, this fourth passageway communicates with the external world. The advantages are that: the pressure balance inside and outside the screw plug is ensured, and the part of oil drops brought out by the splashing of the moving part is effectively ensured not to overflow.

Description

Ventilating screw plug

Technical Field

The utility model belongs to the technical field of ventilation structures, and particularly relates to a ventilation plug screw.

Background

The screw plug refers to a kind of connection member that keeps the inside of the product ventilated with the outside while the product is connected. The structure of the common ventilating plug screw can reach the pressure balance after the inside and outside intercommunication of plug screw, and the hole connection of only turning can realize above-mentioned ventilation effect, simple structure, but if inside has the motion piece to lead to lubricating oil to splash, then lubricating oil can leak external environment through simple air vent easily, influences the safety in utilization to break down easily, shorten life, reduce work efficiency.

In view of the above-mentioned prior art, there is a need for an improved construction of the known vent plug, for which the applicant has made an advantageous design, the solution to be described below being created in this context.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a ventilating screw plug which can effectively prevent lubricating oil from leaking and improve the use safety.

The utility model aims to achieve the aim that the ventilating screw plug comprises a screw plug body and a plug cover arranged at the top of the screw plug body, and is characterized in that: the screw plug body is of a hollow structure which is penetrated up and down, the lower end of the screw plug body is a plug part, the upper end of the screw plug body is a matching part, wherein, the outer wall of the plug part is provided with screw threads, the inner cavity is formed into a first channel, the middle of the cavity of the mating part is provided with a blade shaft, a first blade group and a second blade group are arranged on the blade shaft at intervals along the height direction, the vertical projection of the overlapped upper part and the lower part of the first blade group and the second blade group covers the whole cross section of the matching part cavity, the gap formed by separating the first blade group and the second blade group in the matching part cavity is a second channel, the plug cover is arranged outside the matching part, and the clearance between the top inner wall of the plug cover and the top end surface of the matching part is formed into a third channel, the clearance between the inner side wall of the plug cover and the outer side wall of the matching part is formed into a fourth channel, and the fourth channel is communicated with the outside.

In a specific embodiment of the present invention, a circle of flange is disposed on the outer sidewall of the plug body and corresponding to a boundary between the plug portion and the mating portion, an air outlet communicated with the fourth channel is formed between the flange and the bottom of the plug cover, and the air outlet is communicated with the outside.

In another specific embodiment of the present invention, the first blade group has a plurality of first helical blades which are distributed at intervals around the blade shaft and extend obliquely to the inner side wall of the mating portion; the second blade group is provided with a plurality of second spiral blades, the second spiral blades are distributed at intervals around the blade shaft and obliquely extend to the inner side wall of the matching part, and the upper parts and the lower parts of the first spiral blades and the second spiral blades are overlapped.

In another specific embodiment of the present invention, the mating portion is provided with a plurality of tenons at the outer edge of the top portion facing the plug cover, a mortise block is provided on the top inner wall of the plug cover and corresponding to the tenons, and a mortise adapted to the tenons is formed in the middle of the mortise block.

In another specific embodiment of the present invention, the mating portion is provided with connecting blocks at intervals on the outer side wall, the outer side wall of the connecting block is provided with grooves extending along the circumferential direction, and the inner side wall of the plug cover is provided with ribs corresponding to the grooves and adapted to the grooves.

Because the structure is adopted, a plurality of paths of gas channels which are mutually bent and communicated are formed in the plug screw body, and the first helical blade and the second helical blade are adopted in the gas channels to form the oil retaining mechanism, compared with the prior art, the plug screw has the beneficial effects that: the air flow communication and the pressure balance inside and outside the screw plug are ensured, the direct communication inside and outside the screw plug is avoided, and the situation that part of oil drops carried by splashing of the moving part can flow back to the inside of the screw plug under the action of gravity without overflowing is effectively ensured.

Drawings

Fig. 1 is a front sectional view of the present invention.

Fig. 2 is a side sectional view of the present invention.

In the figure: 1. the screw plug comprises a screw plug body, 11, a screw plug part, 111, threads, 12, a matching part, 121, a blade shaft, 122, a first screw blade, 123, a second screw blade, 124, a tenon, 125, a connecting block, 126, a groove and 13, a flange; 2. the plug cover, 21 tenon groove blocks, 211 tenon grooves and 22 convex edges; 3. a first channel; 4. a second channel; 5. a third channel; 6. a fourth channel; 7. and an air outlet.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes in form and not essential to the inventive concept should be regarded as the protection scope of the present invention.

In the following description, any concept related to the directionality (or the directional nature) of up, down, left, right, front, and rear is intended to facilitate understanding by the public, and thus should not be construed as particularly limiting the technical solution provided by the present invention, with respect to the position state in which the drawings are being described.

Referring to fig. 1 and 2, the present invention relates to a vent screw plug, which includes a screw plug body 1 and a plug cap 2 disposed on the top of the screw plug body 1. The plug screw body 1 has a hollow structure penetrating vertically, and has a lower end constituting a plug portion 11 and an upper end constituting a mating portion 12. The outer wall of the cock part 11 is formed with a thread 111 for connecting and installing with the device, and the inner cavity is formed as the first channel 3. A blade shaft 121 is provided in the middle of the cavity of the fitting portion 12, and a first blade group and a second blade group are provided on the blade shaft 121 at intervals in the height direction. Specifically, the first blade group has a plurality of first helical blades 122, and the plurality of first helical blades 122 are distributed around the blade shaft 121 at intervals and extend obliquely to the inner side wall of the mating part 12; the second blade group has a plurality of second helical blades 123, and the plurality of second helical blades 123 are also distributed around the blade shaft 121 at intervals and extend obliquely to the inner side wall of the fitting part 12. The first helical blade 122 and the second helical blade 123 are disposed to overlap each other in the upper and lower portions, and the overlapped vertical projection covers the entire cross section of the cavity of the mating part 12. The gap in the cavity of the mating part 12, which is partitioned by the first helical blade 122 and the second helical blade 123, constitutes the second channel 4. The plug cover 2 is covered outside the matching part 12, a gap between the top inner wall of the plug cover 2 and the top end surface of the matching part 12 is a third channel 5, and a gap between the inner side wall of the plug cover 2 and the outer side wall of the matching part 12 is a fourth channel 6. The plug screw body 1 is provided with a circle of flange 13 on the outer side wall and corresponding to the junction of the plug portion 11 and the mating portion 12, an air outlet 7 communicated with the fourth channel 6 is formed between the flange 13 and the bottom of the plug cover 2, and the air outlet 7 is communicated with the outside.

Furthermore, the outer edge of the top of the mating part 12 is provided with a plurality of tenons 124 facing the plug cover 2, the top inner wall of the plug cover 2 and corresponding to the tenons 124 are provided with mortise blocks 21, and a mortise 211 matched with the tenons 124 is formed in the middle of the mortise blocks 21. The outer side wall of the mating part 12 is provided with connecting blocks 125 at intervals, the outer side wall of the connecting blocks 125 is provided with grooves 126 extending along the circumferential direction, and the inner side wall of the plug cover 2 is provided with ribs 22 corresponding to the grooves 126 and mounted with the grooves 126 in a matching manner. The plug cover 2 is combined with the screw plug body 1 through the matching of the tenon 124 and the mortise 211 and the cooperation of the convex rib 22 and the groove 126.

With continued reference to fig. 1, the operation of the present invention will be described. The internal airflow rises to enter the first channel 3, then bends to pass through the second channel 4 and then reaches the position of the plug cap 2, then bends downwards from the third channel 5 to enter the fourth channel 6, finally bends 90 degrees and then communicates with the outside through the air outlet 7, and at the moment, the internal pressure and the external pressure are balanced. Meanwhile, oil vapor is not easy to flow out in the bending process. Specifically, when splashed lubricating oil drops move upwards, because the first spiral blade 122 and the second spiral blade 123 are partially overlapped, the cross section of the plug body 1 is completely shielded by a projection effect, so that the oil drops can be prevented from directly entering the position of the plug cover 2 at the top end, the oil drops can only touch the lower surfaces of the first spiral blade 122 and the second spiral blade 123, the oil drops stuck on the blades can drop downwards along the inclined surface due to the action of gravity, one part of the oil drops on the first spiral blade 122 drop onto the second spiral blade 123, and the other part of the oil drops directly converge into the internal cavity of the plug body 1; the oil drops falling on the second screw blade 123, either on the upper surface or the lower surface, eventually fall down along the inclined surface into the internal cavity of the plug body 1 due to gravity. The structure ensures the air flow communication and the pressure balance inside and outside the plug screw body 1, and simultaneously effectively ensures that part of oil drops carried out by splashing of the moving part can return to the inner space of the plug screw body 1 without overflowing.

Claims

1. The utility model provides a ventilation plug screw, includes plug screw body (1) and sets up gag (2) at plug screw body (1) top, its characterized in that: the screw plug body (1) is of a hollow structure which is through up and down, the lower end of the screw plug body is a screw plug part (11), the upper end of the screw plug body is a matching part (12), threads (111) are formed on the outer wall of the screw plug part (11), an internal cavity of the screw plug body is a first channel (3), a blade shaft (121) is arranged in the middle of the cavity of the matching part (12), a first blade group and a second blade group are arranged on the blade shaft (121) at intervals along the height direction, the vertical projection of the overlapped upper part and the lower part of the first blade group and the overlapped second blade group covers the whole cross section of the cavity of the matching part (12), a gap formed by the first blade group and the second blade group in the cavity of the matching part (12) is a second channel (4), the plug cover (2) is covered outside the matching part (12), and a gap between the top inner wall of the plug cover (2) and the top end face of the matching part (12) is a third channel (5), a gap between the inner side wall of the plug cover (2) and the outer side wall of the matching part (12) is formed into a fourth channel (6), and the fourth channel (6) is communicated with the outside.

2. The vent screw plug according to claim 1, wherein a ring of flange (13) is arranged on the outer side wall of the screw plug body (1) and corresponds to the junction of the plug part (11) and the mating part (12), an air outlet (7) communicated with the fourth channel (6) is formed between the flange (13) and the bottom of the plug cover (2), and the air outlet (7) is communicated with the outside.

3. A vent plug screw according to claim 1, wherein the first vane group has a plurality of first screw vanes (122), the plurality of first screw vanes (122) being spaced around the vane shaft (121) and extending obliquely to an inner side wall of the mating portion (12); the second blade group is provided with a plurality of second spiral blades (123), the second spiral blades (123) are also distributed at intervals around the blade shaft (121) and obliquely extend to the inner side wall of the matching part (12), and the first spiral blade (122) and the second spiral blade (123) are partially overlapped up and down.

4. A vent screw according to claim 1, wherein the mating portion (12) is provided with a plurality of tenons (124) at the outer edge of the top portion facing the plug cover (2), a mortise block (21) is provided on the top inner wall of the plug cover (2) corresponding to the tenons (124), and a mortise (211) adapted to the tenons (124) is formed in the middle of the mortise block (21).

5. A vent plug according to claim 1, wherein the mating portion (12) is provided with connecting pieces (125) at intervals on the outer side wall, and grooves (126) extending in the circumferential direction are formed on the outer side wall of the connecting pieces (125), and the plug cover (2) is formed with ribs (22) on the inner side wall corresponding to the grooves (126) to fit with the grooves (126).