CN207315625U - Tool for mounting packing for liquid nitrogen pump - Google Patents
Tool for mounting packing for liquid nitrogen pump Download PDFInfo
- Publication number
- CN207315625U CN207315625U CN201721356652.4U CN201721356652U CN207315625U CN 207315625 U CN207315625 U CN 207315625U CN 201721356652 U CN201721356652 U CN 201721356652U CN 207315625 U CN207315625 U CN 207315625U
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- CN
- China
- Prior art keywords
- liquid nitrogen
- propelling sleeve
- packing ring
- nitrogen pump
- piston rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of tool for mounting packing for liquid nitrogen pump, piston rod is provided with liquid nitrogen pump working chamber, piston-rod lower end is provided with packing ring, it is oriented to lock nut and is arranged on liquid nitrogen pump working chamber top, the chamfering for being oriented to the processing of lock nut bottom and coordinating with frustum inside liquid nitrogen pump working chamber, propelling sleeve push packing ring is set on the piston rod, the outside diameter of propelling sleeve is less than the internal diameter for being oriented to lock nut, the internal diameter of propelling sleeve is respectively greater than the internal diameter of piston rod and the internal diameter of packing ring, and the upper end of propelling sleeve sets lifting lug.The utility model in guiding lock nut bottom by being machined with the chamfering coordinated with the frustum of the working chamber of liquid nitrogen pump, will not be to its crimp during installation packing ring, the installation of propelling sleeve push packing ring is on the piston rod, make good airproof performance, save material, reduce maintenance cost, after packing ring installation, the lifting lug of propelling sleeve lifts propelling sleeve, and lifting lug facilitates the implantation and taking-up of propelling sleeve.
Description
Technical field
The utility model belongs to liquid nitrogen pump technical field, and in particular to a kind of tool for mounting packing.
Background technology
Liquid nitrogen pump P7105A/B is reciprocating pump, and operation medium is liquid nitrogen, design pressure 0.35MPa, operating temperature -196
DEG C, the sealing of liquid nitrogen pump in-vivo medium is filled using filler assembly sealing means, the material of filler assembly for polytetrafluoroethylene (PTFE)
Graphite, is made of two groups of packing seal external members, and every group is 6 to 7 layers of packing ring.Since operating temperature is too low so that filler assembly
Service life shorten, be frequently necessary to replace the filler assembly of liquid nitrogen pump for this, but actually replace during, by
There is the frustum of a 2mm on the inside of liquid nitrogen pump working chamber, and have certain depth so that packing ring is difficult to attach to position, uses
Auxiliary tool easily causes to damage to the screw thread of packing ring and retaining ring, and time-consuming and laborious, it is impossible to ensure by packing rings at different levels it
Between install fastening, so as to influence sealing effect.
The content of the invention
The shortcomings that the technical problem to be solved by the utility model is to overcome the above-mentioned prior art, there is provided one kind manufacture letter
List, good airproof performance, the tool for mounting packing for liquid nitrogen pump saved material, reduce maintenance cost.
Technical solution is used by solving above-mentioned technical problem：Piston rod, piston are provided with liquid nitrogen pump working chamber
Bar lower end is provided with packing ring, is oriented to lock nut and is arranged on liquid nitrogen pump working chamber top, guiding lock nut bottom processing and liquid nitrogen
The chamfering that pump work intracavitary portion frustum coordinates, propelling sleeve push packing ring are set on the piston rod, and the outside diameter of propelling sleeve, which is less than, leads
To the internal diameter of lock nut, the internal diameter of propelling sleeve is respectively greater than the internal diameter of piston rod and the internal diameter of packing ring, and the upper end of propelling sleeve is set
Lifting lug.
The utility model employs the chamfering for being machined with guiding lock nut bottom and coordinating with liquid nitrogen pump working chamber frustum, installation
Will not be to its crimp during packing ring；Propelling sleeve push packing ring installation on the piston rod, make good airproof performance, save material,
Maintenance cost is reduced, after packing ring installation, the lifting lug of propelling sleeve lifts propelling sleeve, and lifting lug facilitates the implantation of propelling sleeve and takes
Go out.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model one embodiment.
Embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only explaining
The utility model, is not used to limit the utility model.
As shown in Figure 1, the tool for mounting packing for liquid nitrogen pump of the present embodiment by lifting lug 1, propelling sleeve 2, piston rod 3,
It is oriented to lock nut 4, the connection of packing ring 6 is formed.
Piston rod 3 is installed in 5 working chamber of liquid nitrogen pump, lock nut 4 is oriented to and is installed on 5 working chamber top of liquid nitrogen pump, be oriented to
4 bottom of lock nut processes chamfering, and the frustum for being oriented to chamfering and 5 working chamber of liquid nitrogen pump of lock nut 4 coordinates, will not when installing packing ring 6
To its crimp, facilitate the installation of packing ring 6.Propelling sleeve 2 pushes packing ring 6 and is installed on piston rod 3, outside propelling sleeve 2
Footpath is less than the internal diameter for being oriented to lock nut 4, and the internal diameter of propelling sleeve 2 is respectively greater than the internal diameter of piston rod 3 and the internal diameter of packing ring 6, makes close
Envelope property is good, saves material, reduces maintenance cost.2 lifting lugs 1 are installed in the upper end of propelling sleeve 2, after packing ring 6 is installed, use lifting lug
1 lifts propelling sleeve 2, and lifting lug 1 facilitates the implantation and taking-up of propelling sleeve 2.
The operation principle of the utility model is as follows：
Lock nut 4 will be oriented to be tightened on the working chamber of liquid nitrogen pump 5, make the work of the chamfering and liquid nitrogen pump 5 on guiding lock nut 4
The frustum for making intracavitary portion is bonded to form a plane, and pushing packing ring 6 using propelling sleeve 2 is installed on piston rod 3, packing ring 6
After installation is complete, propelling sleeve 2 is lifted using lifting lug 1, makees completion industry.
The above, is only the preferred embodiment of the utility model, is not intended to limit the protection of the utility model
Scope.
Claims (1)
1. a kind of tool for mounting packing for liquid nitrogen pump, piston rod (3), piston rod are provided with liquid nitrogen pump (5) working chamber
(3) lower end is provided with packing ring (6), is oriented to lock nut (4) and is arranged on liquid nitrogen pump (5) working chamber top, it is characterised in that：It is described to lead
The chamfering coordinated to the processing of lock nut (4) bottom with frustum inside liquid nitrogen pump (5) working chamber, propelling sleeve (2) push packing ring (6) are set
Put on piston rod (3), the outside diameter of propelling sleeve (2) is less than the internal diameter for being oriented to lock nut (4), and the internal diameter of propelling sleeve (2) is respectively greater than
The internal diameter of piston rod (3) and the internal diameter of packing ring (6), the upper end of propelling sleeve (2) set lifting lug (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721356652.4U CN207315625U (en) | 2017-10-20 | 2017-10-20 | Tool for mounting packing for liquid nitrogen pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721356652.4U CN207315625U (en) | 2017-10-20 | 2017-10-20 | Tool for mounting packing for liquid nitrogen pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207315625U true CN207315625U (en) | 2018-05-04 |
Family
ID=62381878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721356652.4U Active CN207315625U (en) | 2017-10-20 | 2017-10-20 | Tool for mounting packing for liquid nitrogen pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207315625U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963329A (en) * | 2021-02-08 | 2021-06-15 | 泰兴市兴华气阀有限公司 | Auxiliary device for filling |
-
2017
- 2017-10-20 CN CN201721356652.4U patent/CN207315625U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963329A (en) * | 2021-02-08 | 2021-06-15 | 泰兴市兴华气阀有限公司 | Auxiliary device for filling |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |