CN211604703U

CN211604703U - Main box body shell with structure for preventing air passages from leaking air mutually

Info

Publication number: CN211604703U
Application number: CN201921816493.0U
Authority: CN
Inventors: 平家杰; 董方斌; 顾鹏飞; 倪彬
Original assignee: Zhejiang Haolong Electrical Co ltd
Current assignee: Zhejiang Haolong Electrical Co ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-09-29
Anticipated expiration: 2029-10-25

Abstract

The utility model discloses a main box body shell with a structure for preventing air passages from leaking mutually, which comprises an upper shell and a lower shell; the assembling groove is arranged on the lower shell and used for installing the main box body; two air-filled cavities arranged on the lower shell and communicated with the assembly groove; the air tightness detection component is arranged on the lower shell and comprises a first air passage and a second air passage which are respectively communicated with the two inflation cavities, an air leakage prevention space positioned between the first air passage and the second air passage, a first detection piece arranged at the end part of the first air passage and a second detection piece arranged at the end part of the second air passage; the cross sections of the first air passage and the second air passage are both circular structures, and the diameters of the first air passage and the second air passage are 4-4.5 mm; the width of the air leakage preventing space is 12-12.5 mm. The utility model discloses effectively avoided the phenomenon of cross gas each other between the air flue, the gas leakage condition and the position of more quick judgement main tank body improve the qualification rate of main tank body installation greatly.

Description

Main box body shell with structure for preventing air passages from leaking air mutually

Technical Field

The utility model belongs to the technical field of the main tank body structure, especially, relate to a main tank body casing with prevent air flue mutual gas leakage structure.

Background

The distance between two air passage holes on the shell of the existing main box body is designed to be 8-10mm, and the tolerance grade of the diameter of the air passage hole is H. With the structure, after the diameter width of the air passage hole is removed, the actual distance between the two air passage holes is only 3.6 mm. During machining, only a drill bit is used for drilling, and then a boring cutter is used for fine boring; however, in this processing mode, the surface dense layer of the blank is processed, and the position where the interior is loose is directly exposed, so that the final result is that when the product is subjected to airtight detection, an air leakage situation is generated between two processed air passage holes because the interior is loose.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome prior art not enough, provide a main tank casing that has the structure of preventing air flue mutual leakage that is difficult for appearing the gas leakage condition.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a main box body shell with a structure for preventing air passages from leaking each other comprises

An upper housing and a lower housing;

the assembling groove is arranged on the lower shell and used for installing the main box body;

two air-filled cavities arranged on the lower shell and communicated with the assembly groove;

the air tightness detection component is arranged on the lower shell and comprises a first air passage and a second air passage which are respectively communicated with the two inflation cavities, an air leakage prevention space positioned between the first air passage and the second air passage, a first detection piece arranged at the end part of the first air passage and a second detection piece arranged at the end part of the second air passage; the cross sections of the first air passage and the second air passage are both circular structures, and the diameters of the first air passage and the second air passage are 4-4.5 mm; the width of the air leakage preventing space is 12-12.5 mm.

According to the invention, the structure of the two air channel holes is changed, and the distance between the two air channel holes is increased, so that the mold processing can be adopted during processing, and compared with the traditional processing mode, the loosening position of the inner wall of the air channel is not easy to occur; secondly, because the interval increase between two air flues to even under the condition that the air flue inner wall has loose position, the phenomenon of gas mixing each other can not appear between two air flues yet, thereby the gas leakage condition and the position of the quick judgement main tank body, thereby improve the qualification rate of main tank body installation greatly.

The diameters of the first air passage and the second air passage are 4.2 mm.

The width of the air leakage preventing space is 12.2 mm; under this kind of structure, guarantee to get rid of the width after the wall thickness between two air flues and keep at 8mm, for the optimal prevents the air leakage distance.

The first detection piece and the second detection piece are steel balls, and the end parts of the first air passage and the second air passage are respectively provided with an anti-abrasion piece; the anti-abrasion part can be detached relative to the air passage, and then can be independently maintained and replaced as an easily-damaged part, so that the air passage is prevented from being directly abraded, and the service life of the shell is prolonged.

The first air passage comprises a notch groove formed by inwards sinking the lower part of the side surface of the lower shell and a strip-shaped through groove, one end of the strip-shaped through groove is connected with the inflation cavity, and the other end of the strip-shaped through groove is connected with the notch groove; the inner diameter of the strip-shaped through groove is smaller than that of the notch groove, the anti-abrasion piece is a metal ring embedded in the notch groove, and the inner wall of the metal ring is a smooth surface; under the structure, a step is formed at the joint of the strip-shaped channel and the notch groove to limit the anti-abrasion piece, so that the anti-abrasion piece cannot move into the air passage under the driving of the ball even if the surface of the steel ball is completely tightly matched with the anti-abrasion piece when the steel ball is plugged into the air passage, the anti-abrasion piece is always positioned at the end part of the air passage, the ball can be matched with the anti-abrasion piece more tightly, and the air tightness detection effect is good; the smooth surface further reduces the abrasion between the abrasion-proof piece and the steel ball, and prolongs the service life of the steel ball and the abrasion-proof piece.

A connecting port is arranged on one side wall of the lower shell, a connecting gap is arranged on the other side wall of the lower shell, a circle of convex edge protruding out of the side wall of the shell is arranged on the periphery of the connecting gap, and four connecting holes are arranged on the shell corresponding to the positions in the circle of convex edge; with the structure, when the gas part is connected to the connecting gap, primary sealing can be formed between the gas part and the side wall of the shell in the rib, secondary sealing can be formed between the gas part and the inner wall of the rib, and the sealing effect is good; and the connecting hole sets up the within range that establishes at the bead encloses, and then connects spacingly back through pin etc. can also carry on spacingly through the bead to spare part, reduces the condition of rocking of the relative casing of spare part, reduces the possibility that pin and connecting hole appear not hard up.

A first convex part is arranged on the lower shell corresponding to the position above the connecting port, a second convex part and a second convex part are symmetrically arranged on the left side and the right side of the connecting port, and through holes are respectively arranged on the first convex part, the second convex part and the third convex part; a circle of convex rings are formed on the connecting port in an outward extending mode, cavities are formed among the side walls of the second convex part and the third convex part and the convex rings, and mounting gaps are formed among the side walls of the first convex part and the second convex part and the third convex part respectively; under the structure, when other components are connected to the connecting port, the cavity and the mounting gap can carry out double positioning on the components, and the possibility of loosening of screws or pins connected between the cavity and the components is reduced.

To sum up, the utility model discloses effectively avoided the phenomenon of cross gas each other between the air flue, the qualification rate of the installation of the main tank body is improved greatly to the gas leakage condition and the position of more quick judgement main tank body.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a cross-sectional view taken along line a-a of fig. 2.

Fig. 4 is a partially enlarged view of fig. 3.

Fig. 5 is a schematic structural diagram of the present invention.

Detailed Description

As shown in fig. 1-5, a main box body casing with a structure for preventing mutual air leakage of air passages comprises an upper casing and a lower casing 1, an assembly groove 2, two air-filling cavities 3 and an air tightness detection component, wherein the upper casing is not shown in the figure, the upper casing is made of the same material as the lower casing and is connected with the lower casing through screws; the assembly groove 2 is arranged on the lower shell, and the main box body can be arranged on the assembly groove 2 through screws; the two inflation cavities 3 are symmetrically arranged, and the two inflation cavities 3 are both arranged on the lower shell and are communicated with the assembling groove; the air tightness detection component is arranged on the lower shell and specifically comprises a first air passage 41 and a second air passage 42 which are respectively communicated with the two inflation cavities, an air leakage prevention space 43 positioned between the first air passage and the second air passage, a first detection piece 44 arranged at the end part of the first air passage and a second detection piece 45 arranged at the end part of the second air passage; the cross sections of the first air passage and the second air passage are both circular structures, and the diameters of the first air passage and the second air passage are 4-4.5 mm; the width of the air leakage preventing space 43 is 12-12.5 mm.

Preferably, the diameters of the first and second air passages are 4.2mm, and the width of the air leakage preventing space 43 is 12.2 mm.

Further, the first detecting part 44 and the second detecting part 45 are steel balls, and the end parts of the first air passage and the second air passage are respectively provided with an anti-abrasion part 5; the first air duct 41 comprises a notch slot 411 formed by the lower part of the side surface of the lower shell sinking inwards and a strip-shaped through slot 412 with one end connected with the inflation cavity and the other end connected with the notch slot; the inner diameter of the strip-shaped through groove 412 is smaller than that of the notch groove 411, the anti-abrasion piece 5 is a metal ring embedded in the notch groove, and the inner wall of the metal ring is a smooth surface, wherein the smooth surface refers to a relatively smooth and flat inner wall which can be processed by the existing process, and does not refer to an inner wall which does not have friction completely; the structure of the second air passage is the same as that of the first air passage, and is not described in detail herein.

A connecting port 11 is arranged on one side wall of the lower shell 1, and a connecting notch 12 is arranged on the other side wall; preferably, a circle of convex ribs 13 protruding from the side wall of the shell is arranged on the periphery of the connecting gap, the convex ribs and the shell are integrally formed, and four connecting holes 14, specifically screw holes, are arranged on the shell at positions corresponding to the inner parts of the circle of convex ribs.

A first convex part 61 is arranged on the lower shell 1 corresponding to the position above the connecting port, a second convex part 62 and a second convex part 63 are symmetrically arranged on the left side and the right side of the connecting port, and through holes 64 are respectively arranged on the first convex part, the second convex part and the third convex part; the first, second and third convex parts and the lower shell are all integrally formed, and the through holes are threaded holes; a ring 111 is formed on the end surface of the connection port 11 and extends outwards, and preferably, a cavity 71 is formed between the side walls of the

second protrusions

62 and 63 and the ring 111, and a mounting gap 72 is formed between the side wall of the first protrusion 61 and each of the

second protrusions

62 and 63.

Claims

1. The utility model provides a main tank casing with prevent each other gas leakage structure of air flue which characterized in that: comprises that

An upper case and a lower case (1);

an assembly groove (2) arranged on the lower shell and used for installing the main box body;

two air-filled cavities (3) which are arranged on the lower shell and are communicated with the assembly groove;

the air tightness detection component is arranged on the lower shell and comprises a first air passage (41) and a second air passage (42) which are respectively communicated with the two inflation cavities, an air leakage prevention space (43) positioned between the first air passage and the second air passage, a first detection piece (44) arranged at the end part of the first air passage and a second detection piece (45) arranged at the end part of the second air passage; the cross sections of the first air passage and the second air passage are both circular structures, and the diameters of the first air passage and the second air passage are 4-4.5 mm; the width of the air leakage preventing space (43) is 12-12.5 mm.

2. A main casing body having a structure for preventing mutual leakage of air passages according to claim 1, wherein: the diameters of the first air passage and the second air passage are 4.2 mm.

3. A main casing body having a structure for preventing mutual leakage of air passages according to claim 1, wherein: the width of the air leakage preventing space (43) is 12.2 mm.

4. A main casing body having a structure for preventing mutual leakage of air passages according to claim 1, wherein: the first detection piece (44) and the second detection piece (45) are steel balls, and the end parts of the first air passage and the second air passage are respectively provided with an anti-abrasion piece (5).

5. A main case body housing having a structure for preventing mutual leakage of air paths according to claim 4, wherein: the first air channel (41) comprises a notch groove (411) formed by inwards sinking the lower part of the side surface of the lower shell and a strip-shaped through groove (412) with one end connected with the inflation cavity and the other end connected with the notch groove; the internal diameter that the bar led to the groove (412) is less than the internal diameter of breach groove (411), wearing proof spare (5) are for inlaying the becket in this breach groove, and this becket inner wall sets up to smooth surface.

6. A main casing body having a structure for preventing mutual leakage of air passages according to claim 1, wherein: one side wall of the lower shell (1) is provided with a connecting port (11), the other side wall of the lower shell is provided with a connecting notch (12), the periphery of the connecting notch is provided with a circle of convex edges (13) protruding out of the side wall of the shell, and the shell is provided with four connecting holes (14) corresponding to the positions in the circle of convex edges.

7. The main casing body with the structure for preventing mutual air leakage of the air passages as claimed in claim 6, wherein: a first convex part (61) is arranged on the lower shell (1) corresponding to the position above the connecting port, a second convex part (62) and a second convex part (63) are symmetrically arranged on the left side and the right side of the connecting port, and through holes (64) are respectively arranged on the first convex part, the second convex part and the third convex part; a circle of convex rings (111) extend outwards from the connecting port (11), a cavity (71) is formed between the side walls of the second convex parts (62) and the second convex parts (63) and the convex rings (111), and mounting gaps (72) are respectively formed between the side walls of the first convex parts (61) and the second convex parts (62) and the second convex parts (63).