CN217878235U

CN217878235U - Airtightness detection device

Info

Publication number: CN217878235U
Application number: CN202222066232.XU
Authority: CN
Inventors: 何军明
Original assignee: Wenling Jinyue Automation Equipment Co ltd
Current assignee: Wenling Jinyue Automation Equipment Co ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-11-22
Anticipated expiration: 2032-08-05

Abstract

The utility model belongs to the technical field of airtight check out test set, refer in particular to an airtight detection device, including thimble and piston cylinder, piston cylinder's flexible end department is equipped with the piston valve body that forms the inlet chamber with thimble sliding fit, has seted up the inlet port on the inlet chamber, be equipped with on the thimble with the centre bore of inlet chamber intercommunication and the pressure sensor who detects centre bore pressure, be provided with the baffle in the centre bore, form the water conservancy diversion passageway that the air feed stream flows through between the pore wall of baffle and centre bore. The utility model discloses only need add a baffle in the centre bore for disorderly air current is dredged and is stabilized down, just can let pressure sensor detect relatively stable pressure numerical value, and then improves the detection precision of this device, its simple structure, can effectively solve current air current disorder and the not accurate problem of detection that leads to.

Description

Airtightness detection device

The technical field is as follows:

the utility model belongs to the technical field of airtight check out test set, refer in particular to an airtight detection device.

Background art:

the liquefied petroleum gas cylinder valve is an important part for using liquefied petroleum gas, and a strict air tightness test is required during production and processing so as to ensure that the liquefied petroleum gas cylinder valve has air tightness meeting the standard.

The liquefaction pneumatic valve high pressure that current chinese utility model patent (grant No. CN 205826246U) disclosed seals detection device, it is provided with the ring packing including the head of the thimble that has the centre bore, the rear portion is provided with the inlet chamber, upper portion is provided with the pressure sensor who detects centre bore pressure, be provided with the piston valve of closed centre bore in the inlet chamber and the inlet port that communicates with the inlet chamber inner chamber, the front end of mount pad is provided with first cylinder and guide bar or guide cylinder, the rear end of thimble is fixed with gliding guide cylinder or guide bar on guide bar or guide cylinder, the reciprocating motion of first cylinder drive piston valve is in order to open and close the centre bore, form liquefaction pneumatic valve high pressure and seal the detection head. The working principle is as follows: the air inlet is filled with high-pressure gas from the air inlet chamber, the high-pressure gas flows to the liquefied petroleum gas cylinder valve through the central hole, and when the piston valve blocks the air inlet, the pressure sensor detects whether the pressure at the central hole changes or not, so that the air tightness of the liquefied petroleum gas cylinder valve can be detected.

However, in practical use, it is found that the high-pressure gas does not remain static in the central hole, but flows relatively turbulently in the central hole, which causes the pressure value of the pressure sensor to float up and down and not be fixed when the pressure sensor detects the pressure in the central hole, thereby affecting the precision of detecting the airtightness of the lpg cylinder valve.

The invention content is as follows:

the utility model aims at providing an airtight detection device, its overall structure is simple, can effectively dredge the purpose of the downthehole air current in order to reach the steady voltage of centre bore.

The utility model discloses a realize like this:

the air tightness detection device comprises a thimble and a piston cylinder, wherein a piston valve body which is in sliding fit with the thimble and forms an air inlet chamber is arranged at the telescopic end of the piston cylinder, an air inlet hole is formed in the air inlet chamber, a center hole communicated with the air inlet chamber and a pressure sensor for detecting the pressure of the center hole are arranged on the thimble, a flow guide body is arranged in the center hole, and a flow guide channel through which air flows is formed between the flow guide body and the hole wall of the center hole.

In the above air tightness detecting device, the flow guiding body is of a cylindrical structure, the outer wall surface of the thimble is provided with a flow guiding hole communicated with the central hole, the flow guiding body is inserted in the flow guiding hole, a fastening nut is screwed in the flow guiding hole positioned outside the flow guiding body, and the fastening nut is screwed inwards and abuts against the outer end of the flow guiding body.

In the above air tightness detecting device, the flow guide hole and the flow guide body are arranged along a radial direction of the central hole and penetrate through the central hole.

In foretell airtight detection device, the thimble is connected fixedly through coupling assembling around and the piston cylinder, and forms inclosed installation cavity between thimble and the piston cylinder, the flexible end and the piston valve body of piston cylinder all set up in the installation cavity.

In the above air tightness detecting device, the connecting assembly includes a connecting through hole provided on the piston cylinder, and the fastener is screwed with the thimble through the connecting through hole.

In the above air tightness detecting device, the rear end face of the thimble is provided with a containing groove, the bottom surface of the containing groove is provided with a piston groove, the piston cylinder cover is arranged at the notch of the containing groove and formed between the containing groove and the piston cylinder, the piston valve body plunger is connected in the piston groove and formed between the piston valve body and the piston groove, and the air inlet chamber is formed.

In the above air tightness detecting device, the piston cylinder is provided with a positioning protrusion in insertion fit with the accommodating groove.

In the above air tightness detecting device, the piston valve body located in the air inlet chamber is provided with a plug-in convex column which can be inserted at the corresponding port of the central hole.

In the above air tightness detecting device, a first sealing ring is sleeved on the insertion convex column, and a contact surface with a conical surface structure is arranged at the edge of the port where the central hole is communicated with the air inlet chamber; or the air inlet chamber is provided with a contact surface with a plane structure, and the first sealing ring can be in sealing fit with the piston valve body.

In the above air tightness detecting device, a second seal ring is provided between an outer wall surface of the piston valve body and a corresponding wall surface of the thimble.

Compared with the prior art, the utility model outstanding advantage is:

the utility model discloses only need add a baffle in the centre bore for disorderly air current is dredged and is stabilized down, just can let pressure sensor detect relatively stable pressure numerical value, and then improves the detection precision of this device, its simple structure, can effectively solve current air current disorder and the not accurate problem of detection that leads to.

Description of the drawings:

fig. 1 is an overall perspective view of the present invention;

FIG. 2 is a second overall perspective view of the present invention;

fig. 3 is an overall sectional view of the present invention.

In the figure: 1. a thimble; 3. a piston cylinder; 4. a piston valve body; 5. an air intake chamber; 6. an air inlet; 7. a central bore; 8. a pressure sensor; 9. a flow conductor; 10. a flow guide hole; 11. fastening a nut; 12. a mounting cavity; 13. a connecting through hole; 14. positioning the projection; 15. inserting the convex column; 16. a first sealing ring; 17. a contact surface; 18. and a second sealing ring.

The specific implementation mode is as follows:

the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 3:

the air tightness detection device comprises a thimble 1 and a piston cylinder 3, wherein a piston valve body 4 which is in sliding fit with the thimble 1 and forms an air inlet chamber 5 is arranged at the telescopic end of the piston cylinder 3, an air inlet hole 6 is formed in the air inlet chamber 5, a center hole 7 communicated with the air inlet chamber 5 and a pressure sensor 8 for detecting the pressure of the center hole 7 are arranged on the thimble 1, a flow guide body 9 is arranged in the center hole 7, and a flow guide channel through which air flows is formed between the flow guide body 9 and the hole wall of the center hole 7.

Namely the utility model discloses only need add a baffle 9 in centre bore 7 for the turbulent air current is dredged and is stabilized down, just can let pressure sensor 8 detect the pressure numerical value of relatively stable, and then improves the detection precision of this device, its simple structure, can effectively solve current air current disorder and the not accurate problem of detection that leads to.

The flow guiding body 9 may be a middle partition plate directly disposed in the central hole 7, and the middle partition plate is fixed in the central hole 7 through a slot or an over-tight fit, and in this embodiment, the specific manner of disposing the flow guiding body 9 in the central hole 7 is as follows: the guide body 9 is of a cylindrical structure, a guide hole 10 communicated with the central hole 7 is formed in the outer wall surface of the thimble 1, the guide body 9 is inserted in the guide hole 10, a fastening nut 11 is screwed in the guide hole 10 positioned on the outer side of the guide body 9, and the fastening nut 11 is screwed inwards and abuts against the outer end of the guide body 9. In addition, the screw-threaded fit between the fastening nut 11 and the diversion hole 10 also has a good sealing property, and certainly, in order to further improve the sealing properties between the fastening nut 11 and the diversion body 9 and the diversion hole 10 and ensure that the high-pressure gas in the central hole 7 does not leak from the fastening nut 11 and the gap between the diversion body 9 and the diversion hole 10, a sealing gasket may be disposed between the diversion body 9 and the fastening nut 11.

Furthermore, in order to allow the inner end of flow conductor 9 to effectively channel the air flow within central bore 7 and also to allow flow conductor 9 to be relatively stable within central bore 7, flow conductor bores 10 and flow conductor 9 are arranged radially of central bore 7 and through central bore 7. That is, the inner end of current carrier 9 is disposed through central bore 7 along current-guiding hole 10 to achieve the relative positional fit between current carrier 9 and central bore 7.

Meanwhile, in order to avoid the direct exposure of the rear ends of the piston cylinder 3 and the piston valve body 4 to the outside and the external interference, the thimble 1 is fixedly connected with the front and the rear of the piston cylinder 3 through the connecting assembly, a closed installation cavity 12 is formed between the thimble 1 and the piston cylinder 3, and the telescopic end of the piston cylinder 3 and the piston valve body 4 are arranged in the installation cavity 12.

Furthermore, the connecting assembly may adopt a common structure on the market, such as the internal and external threads are fixed in a matching manner, and in this embodiment, in order to simplify the processing process and the assembling operation, the connecting assembly adopts a structure that: the connecting component comprises a connecting through hole 13 formed in the piston cylinder 3, and the fastener is in threaded fixation with the ejector pin 1 through the connecting through hole 13.

In addition, in the present embodiment, the specific structure formed by the mounting cavity 12 and the intake chamber 5 is: the storage tank has been seted up to the rear end face of thimble 1, and the piston groove has been seted up to the tank bottom face department of storage tank, 3 lids of piston cylinder establish in the notch department of storage tank and the storage tank forms between 3 with piston

cylinder installation cavity

12, 4 plungers of piston valve body connect in the piston groove, and form between piston valve body 4 and the piston groove inlet chamber 5.

In addition, in order to enable the piston cylinder 3 to be quickly assembled on the accommodating groove, a positioning protrusion 14 which is in plug-in fit with the accommodating groove is arranged on the piston cylinder 3.

In addition, in order to improve the matching stability between the piston valve body 4 and the air inlet chamber 5, an inserting convex column 15 which can be inserted at the corresponding port of the central hole 7 is arranged on the piston valve body 4 in the air inlet chamber 5.

Furthermore, when the liquefied petroleum gas bottle valve is subjected to airtight detection and in order to improve the sealing property between the piston valve body 4 and the thimble 1, a first sealing ring 16 is sleeved on the inserting convex column 15, and a contact surface 17 with a conical surface structure is arranged at the edge of a port where the central hole 7 is communicated with the air inlet chamber 5; in the present embodiment, the inlet chamber 5 is provided with a contact surface 17 having a planar structure, and the first seal ring 16 can be in sealing engagement between the contact surface 17 and the piston valve body 4.

Furthermore, a second sealing ring 18 is arranged between the outer wall surface of the piston valve body 4 and the corresponding wall surface of the thimble 1. In the embodiment, two sealing rings 18 are arranged at intervals in front of and behind each other.

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

Claims

1. The utility model provides an airtight detection device, including thimble (1) and piston cylinder (3), the flexible end department of piston cylinder (3) is equipped with piston valve body (4) with thimble (1) sliding fit and formation air inlet chamber (5), has seted up inlet port (6) on air inlet chamber (5), is equipped with centre bore (7) with air inlet chamber (5) intercommunication on thimble (1) and detects pressure sensor (8) of centre bore (7) pressure, its characterized in that: a flow guide body (9) is arranged in the central hole (7), and a flow guide channel through which air flows is formed between the flow guide body (9) and the hole wall of the central hole (7).

2. The airtightness detection apparatus according to claim 1, wherein: the guide body (9) is of a cylindrical structure, a guide hole (10) communicated with the central hole (7) is formed in the outer wall surface of the thimble (1), the guide body (9) is inserted in the guide hole (10) and is internally screwed with a fastening nut (11) in the guide hole (10) positioned on the outer side of the guide body (9), and the fastening nut (11) is screwed inwards and abuts against the outer end of the guide body (9).

3. The airtightness detection apparatus according to claim 2, wherein: the guide holes (10) and the guide body (9) are arranged along the radial direction of the central hole (7) and penetrate through the central hole (7).

4. The airtightness detection apparatus according to claim 1, wherein: thimble (1) is connected fixedly through coupling assembling around with piston cylinder (3), and forms inclosed installation cavity (12) between thimble (1) and piston cylinder (3), the flexible end and piston valve body (4) of piston cylinder (3) all set up in installation cavity (12).

5. The airtightness detection apparatus according to claim 4, wherein: the connecting component comprises a connecting through hole (13) formed in the piston cylinder (3), and the fastener is in threaded fixation with the ejector pin (1) through the connecting through hole (13).

6. The airtightness detection apparatus according to claim 4, wherein: the storage tank has been seted up to the rear end face of thimble (1), and the piston groove has been seted up to the tank bottom face department of storage tank, establish in the notch department of storage tank and form between storage tank and piston cylinder (3) lid installation cavity (12), piston valve body (4) plunger is connected in the piston groove, and forms between piston valve body (4) and the piston groove inlet chamber (5).

7. The airtightness detection apparatus according to claim 1, wherein: and a positioning bulge (14) which is in plug-in fit with the accommodating groove is arranged on the piston cylinder (3).

8. The airtightness detection apparatus according to claim 1, wherein: and a plug-in convex column (15) which can be inserted at the corresponding port of the central hole (7) is arranged on the piston valve body (4) in the air inlet chamber (5).

9. The airtightness detection apparatus according to claim 8, wherein: a first sealing ring (16) is sleeved on the inserting convex column (15), and a contact surface (17) with a conical surface structure is arranged at the edge of a port where the central hole (7) is communicated with the air inlet chamber (5); or the air inlet chamber (5) is provided with a contact surface (17) with a plane structure, and the first sealing ring (16) can be in sealing fit between the contact surface (17) and the piston valve body (4).

10. The airtightness detection apparatus according to claim 1, wherein: and a second sealing ring (18) is arranged between the outer wall surface of the piston valve body (4) and the corresponding wall surface of the thimble (1).