CN213744423U

CN213744423U - Novel early warning nut

Info

Publication number: CN213744423U
Application number: CN202022838694.XU
Authority: CN
Inventors: 郏政剑
Original assignee: Taizhou Daheng Machinery Co ltd
Current assignee: Taizhou Daheng Machinery Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-07-20
Anticipated expiration: 2030-11-30

Abstract

The utility model provides a novel early warning nut belongs to electrical apparatus technical field. The nut comprises a nut shell, a bushing and a telescopic ring, wherein the top end of the nut shell is provided with a through hole, the lower end of the nut shell is formed with an opening, matched threads are arranged in the opening end, and a first convex ring and a second convex ring are sequentially formed upwards at the upper end of the nut shell close to the matched threads; the telescopic ring comprises a circular diaphragm, the outer edge of the upper surface of the diaphragm abuts against the second convex ring, a movable cavity is formed between the through hole and the diaphragm, a cylindrical pointer positioned right below the through hole is fixed on the diaphragm, the outer edge of the diaphragm extends downwards to form an annular diaphragm wall, the outer edge of the diaphragm wall is formed with a diaphragm edge, and the upper surface of the diaphragm edge abuts against the first convex ring; the lining is arranged in the sheet wall and comprises a circular bottom sheet, air holes are formed in the bottom sheet, and the outer wall of the bottom sheet is abutted to the inner wall of the sheet wall. The utility model has the advantages of simple structure, strong sealing performance, easy production and assembly and the like.

Description

Novel early warning nut

Technical Field

The utility model belongs to the technical field of electrical apparatus, refer in particular to a novel early warning nut.

Background

In the manufacturing process of the household appliance industry, particularly in the manufacturing process of an air conditioner, an evaporating dish in a heat exchanger needs to be subjected to air tightness inspection to judge whether the evaporator has a leakage safety quality problem or not. But traditional early warning nut structure is comparatively complicated, and still need the sealing washer to strengthen sealed effect, and the more assembly process of part is complicated to lead to production efficiency low grade problem.

Disclosure of Invention

The utility model aims at solving the problem existing in the prior art and providing a novel early warning nut that the leakproofness is strong easily to assemble and improve production efficiency.

The purpose of the utility model is realized like this:

a novel early warning nut comprises a nut shell, a bushing and a telescopic ring, wherein a through hole is formed in the top end of the nut shell, an opening is formed in the lower end of the nut shell, matched threads are arranged in the opening end, and a first convex ring and a second convex ring are sequentially formed upwards in the upper end, close to the matched threads, of the nut shell; the telescopic ring comprises a circular diaphragm, the outer edge of the upper surface of the diaphragm abuts against the second convex ring, a movable cavity is formed between the through hole and the diaphragm, a cylindrical pointer positioned right below the through hole is fixed on the diaphragm, the outer edge of the diaphragm extends downwards to form an annular diaphragm wall, the outer edge of the diaphragm wall is formed with a diaphragm edge, and the upper surface of the diaphragm edge abuts against the first convex ring; the lining is arranged in the sheet wall and comprises a circular bottom sheet, air holes are formed in the bottom sheet, and the outer wall of the bottom sheet is abutted to the inner wall of the sheet wall.

The utility model discloses further set up to, it is protruding that the diaphragm forms the diaphragm downwards, the film becomes the film arch downwards, and the chamber is reserved in the formation between diaphragm arch and the film arch.

The utility model discloses further set up to, the outer edge of film upwards and downwardly extending respectively the shaping has the film upper edge and film lower edge, the outer wall on the film upper edge and film lower edge with the inside wall of piece wall offsets.

The utility model discloses further set up to, cylindricality pointer from top to bottom includes integrated into one piece's syringe needle, spacing ring and grafting portion in proper order, the central shaping of diaphragm up end has the boss, is equipped with the spliced eye with grafting looks adaptation in the boss, when grafting portion and spliced eye suited mutually, the lower terminal surface of spacing ring offsets with the up end of boss.

The utility model discloses further set up to, the top of boss, the outer wall of spacing ring and the diameter of through-hole are the same, the outer wall shaping of boss has the boss inclined plane, the shaping of nearly through-hole lower extreme in the nut shell has the face of supporting with boss inclined plane looks adaptation.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

the utility model has the advantages of simple structure, strong sealing performance, easy production and installation, etc.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is an enlarged schematic view of detail A of FIG. 1;

reference numerals:

1-a nut shell; 10-a through hole; 11-opening; 12-mating threads; 13-a first convex ring; 14-a second convex ring; 15-a movable cavity; 16-butting surface;

2-a bushing; 20-a negative film; 21-pores; 22-negative plate bulge; 23-reserving a cavity; 24-bottom sheet upper edge; 25-bottom edge of bottom sheet;

3-a telescopic ring; 30-a membrane; 300-a boss; 301-a plug hole; 302-boss ramp; 31-cylindrical pointer; 310-a needle head; 311-a limit ring; 312-a plug-in part; 32-sheet walls; 33-sheet edge; 34-diaphragm bulge.

Detailed Description

The invention will be further described in the following with reference to specific embodiments thereof, with reference to figures 1 to 2:

a novel early warning nut comprises a nut shell 1, a bushing 2 and a telescopic ring 3, wherein a through hole 10 is formed in the top end of the nut shell 1, an opening 11 is formed in the lower end of the nut shell 1, a matching thread 12 is arranged in the end of the opening 11, and a first convex ring 13 and a second convex ring 14 are sequentially formed upwards in the nut shell 1 close to the upper end of the matching thread 12; the telescopic ring 3 comprises a circular diaphragm 30, the outer edge of the upper surface of the diaphragm 30 abuts against the second convex ring 14, a movable cavity 15 is formed between the through hole 10 and the diaphragm 30, a cylindrical pointer 31 positioned right below the through hole 10 is fixed on the diaphragm 30, the outer edge of the diaphragm 30 extends downwards to form an annular diaphragm wall 32, the outer edge of the diaphragm wall 32 forms a diaphragm edge 33, and the upper surface of the diaphragm edge 33 abuts against the first convex ring 13; the lining 2 is arranged in the sheet wall 32, the lining 2 comprises a circular bottom sheet 20, the bottom sheet 20 is provided with air holes 21, and the outer wall of the bottom sheet 20 is abutted against the inner wall of the sheet wall 32.

In the installation process, the cylindrical pointer 31 is fixed at the upper end of the telescopic ring 3, the telescopic ring is placed in the nut shell 1, the edge of the diaphragm 30 abuts against the second convex ring 14, the sheet edge 33 abuts against the first convex ring 13, the sheet wall 32 is tightly attached to the inside of the nut shell 1, the lining 2 is placed in the sheet wall 32, and when the sealing performance is detected, the nut shell 1 can be filled with high-pressure helium gas, and the lining 2 is upwards ejected by the high-pressure helium gas. When the sealing device is ejected, the outer edge of the bottom plate 20 is ejected upwards, the outer edge of the diaphragm 30 of the telescopic ring 3 is ejected upwards, namely, the outer edge of the diaphragm 30 is more tightly abutted against the second convex ring 14, the high-pressure helium gas passes through the air hole 21 to eject the diaphragm 30 upwards, so that the cylindrical pointer 31 is ejected upwards, and a user judges the sealing performance by judging whether the pointer in the through hole 10 is highlighted or not.

When the nut is worthy of being pasted, compared with the traditional early warning nut, the telescopic ring 3 has stronger sealing performance when being pasted in the nut shell 1 by utilizing the design of the lining 2, and a sealing ring is not required to be placed at the joint; in addition, under the condition that the bush 2 is not arranged in the traditional mode, the diaphragm 30 of the telescopic ring 3 is easy to directly eject the cylindrical pointer 31 due to high-pressure helium, the sealing inspection under the high-pressure helium is inaccurate, and potential safety hazards are easily caused.

Preferably, as shown in fig. 2, the film sheet 30 forms a film sheet protrusion 34 downward, the bottom sheet 20 forms a bottom sheet protrusion 22 downward, and a reserved cavity 23 is formed between the film sheet protrusion 34 and the bottom sheet protrusion 22. Because the up-and-down movement of the diaphragm 30 depends on the air hole 21 tightly, if the air hole 21 is attached to the upper surface of the bottom plate 20 in the lining 2, the diaphragm 30 normally moves upwards due to the pressure, so the reserved cavity 23 can effectively move the diaphragm 23 up and down normally, and the normal work of the diaphragm is guaranteed.

Preferably, the outer edge of the bottom sheet 20 extends upward and downward to form a bottom sheet upper edge 24 and a bottom sheet lower edge 25, respectively, and the outer walls of the bottom sheet upper edge 24 and the bottom sheet lower edge 25 are abutted against the inner side wall of the sheet wall 32. The upper edge 24 and the lower edge of the bottom sheet can enable the contact surface of the lining 2 and the sheet wall 32 to be larger when the lining is matched, and the sealing effect is better.

Preferably, the cylindrical pointer 31 sequentially includes, from top to bottom, a needle 310, a limiting ring 311 and an insertion portion 312, which are integrally formed, a boss 300 is formed at the center of the upper end surface of the diaphragm 30, an insertion hole 301 matched with the insertion portion 312 is formed in the boss 300, and when the insertion portion 312 is matched with the insertion hole 301, the lower end surface of the limiting ring 311 abuts against the upper end surface of the boss 300.

Preferably, the top end of the boss 300, the outer wall of the limiting ring 311 and the diameter of the through hole 10 are the same, a boss inclined plane 302 is formed on the outer wall of the boss 300, and a butting surface 16 matched with the boss inclined plane 302 is formed in the nut shell 1 near the lower end of the through hole 10.

It is worth mentioning that the cylindrical pointer 31, the nut shell 1 and the bush 2 are supported by polyformaldehyde, and the expansion ring 3 is made of mixed refrigerant-resistant rubber.

The working principle is as follows:

the utility model discloses utilize high-pressure gas to move upwards with the cylindricality pointer on the diaphragm, monitor the gas tightness of air conditioner, utilize the effect to the bushing under high-pressure helium environment, let the piece wall department of expansion ring play good sealed effect, replace the use of traditional sealing washer, simple to operate, the leakproofness is strong also easy to produce.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A novel early warning nut is characterized by comprising a nut shell (1), a bushing (2) and a telescopic ring (3), wherein a through hole (10) is formed in the top end of the nut shell (1), an opening (11) is formed in the lower end of the nut shell (1), a matching thread (12) is arranged in the end of the opening (11), and a first convex ring (13) and a second convex ring (14) are sequentially formed upwards in the nut shell (1) close to the upper end of the matching thread (12); the telescopic ring (3) comprises a circular diaphragm (30), the outer edge of the upper surface of the diaphragm (30) is abutted against the second convex ring (14), a movable cavity (15) is formed between the through hole (10) and the diaphragm (30), a cylindrical pointer (31) positioned right below the through hole (10) is fixed on the diaphragm (30), the outer edge of the diaphragm (30) extends downwards to form an annular diaphragm wall (32), the outer edge of the diaphragm wall (32) is formed with a diaphragm edge (33), and the upper surface of the diaphragm edge (33) is abutted against the first convex ring (13); the lining (2) is arranged in the sheet wall (32), the lining (2) comprises a circular bottom sheet (20), the bottom sheet (20) is provided with air holes (21), and the outer wall of the bottom sheet (20) is abutted to the inner wall of the sheet wall (32).

2. The novel early warning nut as claimed in claim 1, wherein the membrane (30) is formed with a membrane bulge (34) downward, the bottom plate (20) is formed with a bottom plate bulge (22) downward, and a reserved cavity (23) is formed between the membrane bulge (34) and the bottom plate bulge (22).

3. The new type warning nut as claimed in claim 1 or 2, wherein the outer edge of the bottom sheet (20) extends upward and downward to form a bottom sheet upper edge (24) and a bottom sheet lower edge (25), respectively, and the outer walls of the bottom sheet upper edge (24) and the bottom sheet lower edge (25) are abutted against the inner side wall of the sheet wall (32).

4. The novel early warning nut as claimed in claim 1, wherein the cylindrical pointer (31) comprises a needle (310), a limiting ring (311) and an insertion part (312) which are integrally formed from top to bottom in sequence, a boss (300) is formed at the center of the upper end face of the diaphragm (30), an insertion hole (301) matched with the insertion part (312) is formed in the boss (300), and when the insertion part (312) is matched with the insertion hole (301), the lower end face of the limiting ring (311) abuts against the upper end face of the boss (300).

5. The novel early warning nut as claimed in claim 4, wherein the top end of the boss (300), the outer wall of the limiting ring (311) and the through hole (10) have the same diameter, a boss inclined surface (302) is formed on the outer wall of the boss (300), and a butting surface (16) matched with the boss inclined surface (302) is formed near the lower end of the through hole (10) in the nut shell (1).