CN213776559U

CN213776559U - Air rail sealing device

Info

Publication number: CN213776559U
Application number: CN202022557017.0U
Authority: CN
Inventors: 王吉; 郝赫; 娄建国
Original assignee: Kelin Lantai Environmental Technology Changchun Co ltd
Current assignee: Kelin Lantai Environmental Technology Changchun Co ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-07-23
Anticipated expiration: 2030-11-06

Abstract

The utility model discloses an air rail sealing device, including the air rail disk seat and insert and with air rail disk seat threaded connection's sensor, the cover is equipped with O type circle on the screw rod of sensor, the sensor has still been seted up and is located the fluting of screw rod periphery side, the packing is equipped with the gasket in the fluting. Above-mentioned gas rail sealing device provides double seal when sensor and gas rail disk seat are connected through O type circle and gasket, not only strengthens sealed fault rate that reduces the product, improves the qualification rate of product, reduces the cost of product, reduces the requirement to work piece machining precision moreover.

Description

Air rail sealing device

Technical Field

The utility model relates to an air rail sealing technique field, in particular to air rail sealing device.

Background

The sealing structure of the existing air rail mainly comprises axial sealing, end face sealing and conical surface sealing, most sealing materials are rubber, and a few other materials are used.

The sealing structure used at present is in a form that a conical surface is sealed with an O-shaped ring 11, and the O-shaped ring 11 is compressed and deformed in the process of screwing a workpiece, so that the sealing purpose is achieved; fig. 2 is a schematic view of an ideal situation in which the O-ring 11 is pressed well, and fig. 3 is a schematic view of an actual situation in which the O-ring 11 is pressed poorly. The existing sealing forms have the following disadvantages: the size error of the workpiece is large, so that the matching error is large; the coaxiality error of the workpiece is large, so that the O-shaped ring 11 is unevenly compressed; the roughness error of the workpiece is large, and the O-shaped ring 11 is scratched; the O-ring 11 has poor precision, hardness and surface quality.

Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a gas rail sealing device that can reduce the requirement for the machining accuracy of a workpiece and improve the sealing performance of a batch product.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gas rail sealing device through O type circle and gasket, provides double seal when sensor and gas rail disk seat are connected, not only strengthens the fault rate that sealed reduction product, improves the qualification rate of product, reduces the cost of product, reduces the requirement to work piece machining precision moreover.

In order to achieve the above object, the utility model provides an air rail sealing device, including the air rail disk seat and insert and with air rail disk seat threaded connection's sensor, the cover is equipped with O type circle on the screw rod of sensor, the sensor has still been seted up and has been located the fluting of screw rod periphery side, the gasket is equipped with in the fluting.

Preferably, the open groove is annularly formed by taking the center of the screw as a circle center.

Preferably, the number of the slots is multiple, and the slots are formed in multiple annular shapes by taking the center of the screw as a circle center, so that the installation of the gaskets is realized.

Preferably, the height of the shim is greater than the depth of the slot.

Preferably, the gasket is in particular a tetrafluoroethylene gasket.

Preferably, the compression amount of the tetrafluoroethylene gasket is 0.3-0.4 mm when the sensor is connected with the air rail valve seat.

Compared with the prior art, the air rail sealing device provided by the utility model comprises an air rail valve seat and a sensor, wherein the sensor is inserted into the air rail valve seat and is in threaded connection with the air rail valve seat, an O-shaped ring is sleeved on a screw rod of the sensor, the sensor is also provided with a slot, the slot is positioned on the outer peripheral side of the screw rod, and a gasket is arranged in the slot; the sensor of the air rail sealing device is in threaded connection with the air rail valve seat, and in the connection process, the sealing protection between the sensor and the air rail valve seat is provided through an O-shaped ring and a gasket, wherein the O-shaped ring is sleeved through a screw rod of the sensor, and the gasket is arranged through a groove; in the process of connecting the sensor and the air rail valve seat, an O-shaped ring and a gasket between the sensor and the air rail valve seat are continuously compressed until a contact surface between the sensor and the air rail valve seat is tightly attached and sealed and connected, the air rail sealing device is based on the existing O-shaped ring seal, an end face sealing structure in a gasket form is added, a double-sealing structure form of the O-shaped ring and the gasket is combined, the qualification rate of batch products is improved, the manufacturing precision requirement of workpieces is reduced, the product qualification rate is improved, the product cost is reduced, and the failure rate of the products is reduced in the using process by the double-sealing structure form.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of an air rail sealing device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a prior art air rail seal assembly in a configuration where the seal is desired;

FIG. 3 is a schematic view of a prior art air rail seal assembly during off-center sealing;

FIG. 4 is a schematic view of the sensor of FIG. 1 without the spacer;

fig. 5 is a schematic structural view of the sensor of fig. 1 with a gasket installed.

Wherein:

1-sensor, 2-air rail valve seat, 11-O-shaped ring, 12-groove and 13-gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 5, wherein fig. 1 is a schematic structural diagram of an air rail sealing device according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of an air rail sealing device in the prior art when sealing is ideal, fig. 3 is a schematic structural diagram of an air rail sealing device in the prior art when sealing is eccentric, fig. 4 is a schematic structural diagram of a sensor in fig. 1 when no gasket is installed, and fig. 5 is a schematic structural diagram of a sensor in fig. 1 when a gasket is installed.

In a first specific embodiment, the air rail sealing device provided by the utility model comprises a sensor 1 and an air rail valve seat 2, wherein the sensor 1 is provided with a screw, the air rail valve seat 2 is provided with a screw hole for the screw to be connected with, and the sensor 1 is inserted into the screw hole of the air rail valve seat 2 through the screw rod, so that the sensor 1 is installed and fixed on the air rail valve seat 2; the double-sealing structure is arranged on the contact surface of the sensor 1 and the air rail valve seat 2, and specifically, the double-sealing structure comprises an O-shaped ring 11 and a gasket 13, the O-shaped ring 11 is sleeved on the screw rod of the sensor 1, the gasket 13 is arranged in a groove 12 of the sensor 1, and the groove 12 is positioned on the outer peripheral side of the screw rod.

In the embodiment, the air rail sealing device is equivalent to a sealing structure additionally provided with a gasket 13 on the basis of the existing sealing structure of the O-shaped ring 11, wherein the O-shaped ring 11 is in conical surface sealing, and the gasket 13 is in end surface sealing; the sealing structure of the O-ring 11 includes: the size error of the workpiece is large, so that the matching error is large; the coaxiality error of the workpiece is large, so that the O-shaped ring 11 is unevenly compressed; the roughness error of the workpiece is large, and the O-shaped ring 11 is scratched; the O-ring 11 has poor precision, hardness and surface quality.

The existing conical surface seal and axial seal have strict requirements on the size precision, coaxiality error and roughness of workpieces and the precision of the O-shaped ring 11, and more influence factors exist, the two workpieces are installed in a precession mode, if the interference with the O-shaped ring 11 is too large, the O-shaped ring 11 is easy to deform and wrinkle, if the end surface seal adopts the precession mode, rubber materials cannot be adopted, and the stability of batch products can be influenced by the conical surface seal mode.

In conclusion, the air rail sealing device is additionally provided with the end face sealing structure in the form of the gasket 13 on the basis of the existing O-shaped ring 11 sealing, and is combined with the double-sealing structure in the form of the O-shaped ring 11 and the gasket 13, so that the purpose of improving the sealing stability is achieved, the qualification rate of batch products is improved, the manufacturing precision requirement of workpieces is reduced, the product qualification rate is improved, the product cost is reduced, the fault rate of products is reduced in the double-sealing structure in the using process, the problem of sealing ammonia at the joint of the sensor 1 and the air rail valve seat 2 is solved, and the sensor 1 is a pressure sensor and a temperature sensor.

It should be noted that the utility model has the improvement that the sealing connection structure between the sensor 1 and the air rail valve seat 2 not only reduces the requirement for the processing precision of the workpiece, but also improves the sealing performance of the batch products; besides, the working principle and other structures except the seal of the sensor 1 or the air rail valve seat 2 are not changed, and as for other structures except the seal, please refer to the prior art, which is not described herein again.

In addition, the present embodiment only emphasizes the end face sealing structure of the gasket 13, and the material of the gasket 13 is not particularly limited, that is, the material that can satisfy the reliable and stable sealing connection should be included in the description of the present embodiment.

Illustratively, the gasket 13 is a tetrafluoroethylene gasket, in other words, the end face seal material is tetrafluoroethylene, and the tetrafluoroethylene material has good ammonia gas resistance and self-lubricating property, and does not wrinkle in the screwing process.

In a specific embodiment, the gasket 13 is in a hollow ring shape, and the upper and lower surfaces of the gasket 13 are respectively tightly attached to the sensor 1 and the valve seat 2 of the air rail, so as to realize the sealing connection between the sensor 1 and the valve seat 2 of the air rail.

In the embodiment, the slot 12 is annularly opened around the center of the screw, and the gasket 13 is installed in the annular slot 12.

It should be noted that the present embodiment only emphasizes the structural shape of the gasket 13, and the number of the gaskets 13 is not particularly limited, that is, one or more than one gasket 13 may be provided as required, and correspondingly, the same number of slots 12 as the number of the gaskets 13 are opened.

Illustratively, the quantity of fluting 12 is a plurality of, and a plurality of fluting 12 use the center of screw rod to be a plurality of rings forms and offer as the centre of a circle, and the radial dimension of a plurality of fluting 12 from inside to outside increases gradually to realize installing of a plurality of gaskets 13, the end face seal when sensor 1 and air rail valve seat 2 sealing connection has a plurality of contact surfaces this moment, in order to provide better sealed effect.

In addition, the height of the gasket 13 is greater than the depth of the slot 12, so that when the gasket 13 is installed in the slot 12, the upper part of the gasket 13 protrudes out of the upper surface of the slot 12, and the gasket 13 is compressed when a sufficient margin is reserved for the connection between the sensor 1 and the air rail valve seat 2, thereby obtaining a better sealing effect.

Illustratively, when the sensor 1 is connected with the air rail valve seat 2, the sensor 1 with the tetrafluoroethylene gasket is screwed into the air rail valve seat 2 to compress the tetrafluoroethylene gasket until the tetrafluoroethylene gasket is in contact with a metal plane, and the compression amount of the tetrafluoroethylene gasket is 0.3-0.4 mm.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

It is right above that the utility model provides an air rail sealing device has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The utility model provides an air rail sealing device, its characterized in that, including air rail disk seat (2) and insert and with air rail disk seat (2) threaded connection's sensor (1), the cover is equipped with O type circle (11) on the screw rod of sensor (1), sensor (1) has still been seted up and is located fluting (12) of screw rod periphery side, the packing piece (13) are equipped with in fluting (12).

2. Air-rail sealing device according to claim 1, characterized in that the slot (12) is annularly open around the center of the screw.

3. The air rail sealing device according to claim 2, wherein the number of the slots (12) is multiple, and the slots (12) are opened in multiple annular shapes with the center of the screw as a circle center, so as to realize installation of the gaskets (13).

4. Air rail sealing device according to claim 1, characterized in that the height of the gasket (13) is greater than the depth of the slot (12).

5. Air rail sealing device according to any one of claims 1 to 4, characterized in that the gasket (13) is in particular a tetrafluoroethylene gasket.

6. The air rail sealing device according to claim 5, wherein the compression amount of the tetrafluoroethylene gasket when the sensor (1) and the air rail valve seat (2) are connected is 0.3-0.4 mm.