CN209308902U - A kind of high-performance metering pump plunger sealing structure - Google Patents
A kind of high-performance metering pump plunger sealing structure Download PDFInfo
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- CN209308902U CN209308902U CN201822116401.XU CN201822116401U CN209308902U CN 209308902 U CN209308902 U CN 209308902U CN 201822116401 U CN201822116401 U CN 201822116401U CN 209308902 U CN209308902 U CN 209308902U
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- Prior art keywords
- plunger
- lip
- pump
- liquid storage
- storage chamber
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Abstract
The utility model relates to a kind of high-performance metering pump plunger sealing structures.It is characterized by: two-stage seal assembly is arranged between plunger and pump head, liquid storage chamber is set, the current by pass of setting connection liquid storage chamber on pump head between two-stage seal assembly.The utility model uses two-stage sealing structure, and liquid storage chamber is set between two-stage seal assembly, in liquid storage chamber, the pump intake that one current by pass is connected to metering pump is set, this structure can guarantee that sealing structure successively plays sealing function, i.e. after primary seal component is ineffective, the medium of leakage is stored in liquid storage chamber, and the pressure in liquid storage chamber is well below pump pressure, secondary seal component can function well as sealing function in this way, the medium in liquid storage chamber flows back into the pump intake of plunger type metering pump by current by pass simultaneously, to accomplish plunger metering pump plunger sealing structure and plunger metering pump same service life.
Description
Technical field
The utility model relates to a kind of high-performance metering pump plunger sealing structures.
Background technique
Due to plunger type metering pump by piston reciprocation movement come pumped (conveying) medium, plunger is sealed it is particularly critical, at present
Used sealing structure is the single-stage sealing structure as made of multiple sealing ring stack combinations between its plunger and the pump housing, this
The sealing structure of form due to the deformation of sealing ring, abrasion, causes to leak in use for some time, so that plunger type is measured
The service life of pump shortens dramatically.
Utility model content
Aiming at the problems existing in the prior art, the purpose of this utility model is to provide a kind of high-performance to measure pump plunger
The technical solution of sealing structure.
A kind of high-performance metering pump plunger sealing structure, it is characterised in that: two-stage is set between plunger and pump head
Liquid storage chamber is arranged between two-stage seal assembly for seal assembly, the current by pass of setting connection liquid storage chamber on pump head.
A kind of high-performance metering pump plunger sealing structure, it is characterised in that welded part is set on the pump head,
Plunger is arranged in welded part, and two-stage seal assembly is made of primary seal component and secondary seal component, plunger and pump head
Between be arranged primary seal component, between plunger and welded part be arranged secondary seal component, liquid storage chamber is by pump head, plunger and pressure
Relay part surrounds.
A kind of high-performance metering pump plunger sealing structure, it is characterised in that the current by pass and pump head are pumped into
Mouth connection.
A kind of high-performance metering pump plunger sealing structure, it is characterised in that the two-stage seal assembly is all made of O
Type sealing ring.
A kind of high-performance metering pump plunger sealing structure, it is characterised in that the two-stage seal assembly is all made of lip
Type sealing ring.
A kind of high-performance metering pump plunger sealing structure, it is characterised in that the lip-shaped sealed ring is matched with support ring
Close setting.
A kind of high-performance metering pump plunger sealing structure, it is characterised in that the welded part is by interior pressure cap and outside
Pressure cap composition, the primary seal component is by the first support ring, the first lip-shaped sealed ring, the second support ring and the second lip-type seal
Circle composition, the first support ring, the first lip-shaped sealed ring, the second support ring and the second lip-shaped sealed ring are successively set on the limit of pump head
Position is intracavitary, and interior pressure cap and pump head threaded simultaneously touch the second lip-shaped sealed ring；The secondary seal component is supported by third
Ring and third lip-shaped sealed ring composition, third support ring and third lip-shaped sealed ring are set gradually in the limit chamber of interior pressure cap, outside
Pressure cap and interior pressure cap threaded simultaneously touch third lip-shaped sealed ring；The plunger, interior pressure cap and pump head surround liquid storage chamber.
The utility model uses two-stage sealing structure, and liquid storage chamber is arranged between two-stage seal assembly, sets in liquid storage chamber
The pump intake that a current by pass is connected to metering pump is set, this structure can guarantee that two-stage sealing structure successively plays sealing and makees
With that is, after primary seal component is ineffective, the medium of leakage is stored in liquid storage chamber, and the pressure in liquid storage chamber is much low
In pump pressure, such secondary seal component can function well as sealing function, while the medium in liquid storage chamber passes through current by pass
The pump intake of plunger type metering pump is flowed back into, to accomplish plunger metering pump plunger sealing structure and plunger metering pump same service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
In figure: 1- plunger；The outer pressure cap of 2-；Pressure cap in 3-；4- third lip-shaped sealed ring；5- third support ring；The sealing of 6-O type
Circle；7- liquid storage chamber；The second lip-shaped sealed ring of 8-；The second support ring of 9-；The first lip-shaped sealed ring of 10-；The first support ring of 11-；12-
Pump head；13- current by pass；14- pump intake；15- pump discharge.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings of the specification:
A kind of high-performance metering pump plunger sealing structure, is arranged two-stage seal assembly between plunger 1 and pump head 12, two-stage is close
Liquid storage chamber 7 is set between sealing assembly, the current by pass 13 of setting connection liquid storage chamber, the pump of current by pass 13 and pump head on pump head 12
Entrance connection.
Welded part is set on pump head 12, and plunger 1 is arranged in welded part, and two-stage seal assembly is by primary seal group
Part and secondary seal component are constituted, and primary seal component is arranged between plunger and pump head, two are arranged between plunger and welded part
Grade seal assembly, liquid storage chamber 7 are surrounded by pump head, plunger and welded part.
Preferably, two-stage seal assembly is all made of O-ring seal.
Preferably, two-stage seal assembly is all made of lip-shaped sealed ring, and lip-shaped sealed ring is equipped with support ring.
Preferably, welded part can be set to one or two, lip-shaped sealed ring and support ring can also it is a set of or
Two sets of person.
Embodiment
Two welded parts are arranged in the embodiment, i.e., interior pressure cap and outer pressure cap；It is close that two sets of lip types are arranged in primary seal component
Seal and support ring, i.e. the first lip-shaped sealed ring, the first support ring, the second lip-shaped sealed ring, the second support ring, secondary seal group
A set of lip-shaped sealed ring and support ring, i.e. third lip-shaped sealed ring, third support ring is arranged in part.
First support ring, the first lip-shaped sealed ring, the second support ring and the second lip-shaped sealed ring are successively set on pump head
In limit chamber, interior pressure cap and pump head threaded simultaneously touch the second lip-shaped sealed ring；Third support ring and third lip-type seal
Circle is set gradually in the limit chamber of interior pressure cap, and outer pressure cap and interior pressure cap threaded simultaneously touch third lip-shaped sealed ring；Plunger,
Interior pressure cap and pump head surround liquid storage chamber, and liquid storage chamber is connected to the pump intake of metering pump through current by pass.
When installation, the first support ring 11, the first lip-shaped sealed ring 10, the second support ring 9, the second lip-shaped sealed ring 8 are pressed
Fig. 1 is sequentially loaded into pump head 12；O-ring seal 6 on the interior pressure cap 3 and is screwed in pump head 12, interior pressure cap 3 is made to touch the
Two lip-shaped sealed rings 8；Third support ring 5, third lip-shaped sealed ring 4 are sequentially loaded into interior pressure cap 3 by Fig. 1, then screw in outer pressure cap 2
Outer pressure cap 2 is set to touch third lip-shaped sealed ring 4；It is inserted into plunger 1, interior pressure cap 3 is adjusted, in the second support ring 9, the first support ring
The second lip-shaped sealed ring 8 is set to be close to plunger surface, obstruction leakage with the lip edge of the first lip-shaped sealed ring 10 under 11 collective effects
Occur and obtain sealing effect, i.e., the first order seals；Outer pressure cap 2 is adjusted, makes third lip-type seal under the effect of third support ring 5
It encloses 4 lip edges and is close to plunger surface, again serve to sealing effect, is i.e. the second level seals；Pressure cap 3 and pump head 12, plunger 1 in simultaneously
Between form liquid storage chamber 7, and current by pass 13 is set on pump head 12 and connects liquid storage chamber 7, current by pass 13 is connected to metering
The pump intake of pump.
When plunger pump work, 1 bilateral reciprocation of plunger, medium enters from pump intake 14, and pump discharge 15 is extracted out；In medium
Under pressure collective effect, the lip edge of the second lip-shaped sealed ring 8 and the first lip-shaped sealed ring 10 is further adjacent to plunger surface, from
And enhance sealing effect.
When the first order sealing structure that the second lip-shaped sealed ring 8, the first lip-shaped sealed ring 10 and plunger 1 are formed is ineffective
Afterwards, the medium of leakage is stored in liquid storage chamber 7, and the pressure in liquid storage chamber 7 is well below pump pressure, such third lip-shaped sealed ring
4 second level sealing structures formed with plunger 1 can function well as sealing function, while the medium in liquid storage chamber passes through aerial drainage
Channel flows back into the pump intake of plunger type metering pump, and it is outer that such medium would not leak into pump, with only setting liquid storage chamber without
The structure that current by pass is arranged is compared, and the metering pump service life of the structure increases significantly, to accomplish plunger metering pump plunger
Sealing structure and plunger metering pump same service life.
Claims (7)
1. a kind of high-performance metering pump plunger sealing structure, it is characterised in that: two-stage seal assembly is set between plunger and pump head,
Liquid storage chamber is set between two-stage seal assembly, the current by pass of setting connection liquid storage chamber on pump head.
2. a kind of high-performance metering pump plunger sealing structure according to claim 1, it is characterised in that set on the pump head
Welded part is set, plunger is arranged in welded part, and two-stage seal assembly is made of primary seal component and secondary seal component,
Primary seal component is set between plunger and pump head, secondary seal component is set between plunger and welded part, and liquid storage chamber is by pumping
Head, plunger and welded part surround.
3. a kind of high-performance metering pump plunger sealing structure according to claim 1, it is characterised in that the current by pass
It is connected to the pump intake of pump head.
4. a kind of high-performance metering pump plunger sealing structure according to claim 1 or 2, it is characterised in that the two-stage is close
Sealing assembly is all made of O-ring seal.
5. a kind of high-performance metering pump plunger sealing structure according to claim 1 or 2, it is characterised in that the two-stage is close
Sealing assembly is all made of lip-shaped sealed ring.
6. a kind of high-performance metering pump plunger sealing structure according to claim 5, it is characterised in that the lip-type seal
Circle is equipped with support ring.
7. a kind of high-performance metering pump plunger sealing structure according to claim 2, it is characterised in that the welded part
Be made of interior pressure cap and outer pressure cap, the primary seal component by the first support ring, the first lip-shaped sealed ring, the second support ring and
Second lip-shaped sealed ring composition, the first support ring, the first lip-shaped sealed ring, the second support ring and the second lip-shaped sealed ring are successively set
It sets in the limit chamber of pump head, interior pressure cap and pump head threaded simultaneously touch the second lip-shaped sealed ring；The secondary seal group
Part is made of third support ring and third lip-shaped sealed ring, and third support ring and third lip-shaped sealed ring set gradually interior pressure cap
In limit chamber, outer pressure cap and interior pressure cap threaded simultaneously touch third lip-shaped sealed ring；The plunger, interior pressure cap and pump head enclose
At liquid storage chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822116401.XU CN209308902U (en) | 2018-12-17 | 2018-12-17 | A kind of high-performance metering pump plunger sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822116401.XU CN209308902U (en) | 2018-12-17 | 2018-12-17 | A kind of high-performance metering pump plunger sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209308902U true CN209308902U (en) | 2019-08-27 |
Family
ID=67677429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822116401.XU Active CN209308902U (en) | 2018-12-17 | 2018-12-17 | A kind of high-performance metering pump plunger sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209308902U (en) |
-
2018
- 2018-12-17 CN CN201822116401.XU patent/CN209308902U/en active Active
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