CN2869375Y - Coated stainless steel seal-ring-free plunger metering pump - Google Patents
Coated stainless steel seal-ring-free plunger metering pump Download PDFInfo
- Publication number
- CN2869375Y CN2869375Y CN 200520123011 CN200520123011U CN2869375Y CN 2869375 Y CN2869375 Y CN 2869375Y CN 200520123011 CN200520123011 CN 200520123011 CN 200520123011 U CN200520123011 U CN 200520123011U CN 2869375 Y CN2869375 Y CN 2869375Y
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- stainless steel
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- pump housing
- fluid
- pump
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Abstract
The utility model relates to a stainless steel non-sealing metering pump with a coating layer, composing of a pump body and a piston. The pump body comprises an authentic stainless steel base and a chrome-plating layer or a chrome nitrification layer coated by the physical gasification sediment or the physically chemical gasification sediment treated on the inner surface in the authentic stainless steel base. The piston comprises an authentic stainless steel base and a chrome-plating layer or a chrome nitrification layer coated by the physical gasification sediment or the physically chemical gasification sediment treated on the outer surface in the authentic stainless steel base. Between the piston and the pump body is equipped with a 1 to 20um wide gap. On the pump body is preset with a liquid guiding hole for the liquid inputs or outputs. The utility model metering pump is resistant to erode, and the liquid is not leakage because of the precisely machining which enhances the stainless steel surface strength and hardness to improve the capability to be resistant to wear and erode. Because the structure is simplified without rubber sealing ring to avoid the worn of the rubber seals, the model is applicable to the food and medicine fields in which the stainless steel is acted as a base material for being sterilized by the steam and where the corrosive metering liquid is used.
Description
Technical field
The utility model belongs to the measuring apparatus field, the stainless steel that relates to a kind of band coating of accurate measurement fluid dispenser does not have the seal ring plunger metering pump, being particularly suited in food, medicine, medical treatment, daily chemical products must be with the stainless steel material of the anti-steam sterilizing situation as the pump housing and piston base material, and the liquid that is measured has higher corrosive situation.
Background technique
At present, known is that the plunger metering pump of base material is made up of cylinder body, piston and O-ring seal with the stainless steel.But at present at the plunger metering pump that needs steam sterilizing field and corrosion-resistant field, great majority are to adopt glass cylinder body and glass piston, or silicone rubber, fluoroplastic material are that the stainless steel cylinder body and the piston of rubber sealing realized drain and sealing.At first, this glass plunger metering pump, because the back poor processability of glass, it is very high, damaged easily simultaneously that measuring accuracy is not allowed to be easy to do, and also can produce precipitate with some product stripping that is measured sometimes.If use the stainless steel plunger type metering pump of band cushion rubber structure, in the high strength using process of pump, because the strength problem of cushion rubber, sealability weakens gradually, can produce leakage or fluid entrained gas after repeatedly passing in and out cylinder body and make metering inaccurate and produce few liquid even empty liquid phenomenon, need often to change corresponding cushion rubber; Because the stainless steel hardness ratio is lower, in case improper thorough destruction of just causing the pump housing takes place to safeguard.Therefore, above the pump housing of two kinds of structures, bring a lot of unfavorable factors all can for the process of metering packing, influenced the packing effect of fluid product and the quality of product, cause damage easily or the raising of cost, make troubles also for simultaneously the maintenance and the cleaning of equipment.
Summary of the invention
Problem to be solved in the utility model is, overcomes the deficiencies in the prior art, provides a kind of stainless steel of high precision of band coating not have the seal ring plunger metering pump, and metering accurately can be carried out steam sterilizing, wear-resistant, and corrosion resistant is turbid, good seal performance.
The utility model solves its technical problem and takes following technological scheme to realize:
The stainless steel of a kind of band coating that provides according to the utility model does not have the seal ring plunger metering pump, comprise the pump housing, piston, it is characterized in that: the described pump housing is formed with the chromium or the chromium nitride coating of physical vapor deposition or physical chemistry vapor deposition by the austenite stainless steel base with at austenite stainless steel base internal surface, piston is formed with the chromium or the chromium nitride coating of physical vapor deposition or physical chemistry vapor deposition by the austenite stainless steel base with at the Austenitic Stainless Steel outer surface of matrix, the pump housing and piston are on the working surface that contacts with each other, maintain 1～20 micron gap, on the pump housing, be reserved with the fluid guidance port of turnover fluid.
It is to take following technological scheme further to realize that the utility model solves its technical problem:
Aforesaid fluid guidance port is to be reserved in of pump housing top to enter the drain import of fluid and drain outlet that one is extruded fluid, and in drain import and drain outlet port one one-way valve is housed respectively.
Aforesaid Austenitic Stainless Steel adopts the Austenitic Stainless Steel of anti-metal intergranular corrosion, comprise contain in the steel that Cr is about 18%, about 0.1% o'clock of Ni 8%～10%, C, have stainless steel 304,316, the 316L, 317 of stable austenite structure.
The utility model compared with prior art has significant advantage and beneficial effect:
1, do base material with the Austenitic Stainless Steel of anti-metal intergranular corrosion, mainly comprise contain in the steel that Cr is about 18%, about 0.1% o'clock of Ni8%～10%, C, have the stainless steel of stable austenite structure, promptly 304,316,316L, 317 etc.Make this metering pump can comprise various sterilizations, sterilization methods such as saturated pure steam sterilizing, high temperature hot air sterilization, high-temperature acid alkali treatment.Can satisfy batch sterilization requirement strict in the productions such as pharmacy, food; The pump housing of this material makes it can be applied to the metering of the stronger fluid of various corrosivity in addition, for example various acidic liquids etc.
2,, carry out the processing of accurate endoporus and cylindrical to the stainless steel being the pump housing and the piston of matrix.The pump housing after the vapor deposition of assurance process and piston keep 1～20 micron gap on the working surface that contacts with each other.Both because the existence in gap guarantees that piston can pump freely in the pump housing; Guarantee again in the using process of pump, do not have the fluid that is measured and in the gap of the pump housing and piston, flow out; Can not make simultaneously extraneous air be brought into the space of metering by the gap.Thereby guaranteed when not having the O-ring seal structure, realized the fluid metering space and outside isolation of pump housing inside.
3, with the method for physical vapor deposition (PVD) or physical chemistry vapor deposition (PCVD), it with the stainless steel internal surface of the pump housing of matrix, carry out uniform coating with the outer surface of piston and handle, on the surface that might contact with each other when the nitride of a kind of chromium or chromium is coated in the stainless steel pump housing and pistons work uniformly.This coating can improve the hardness of stainless steel surfaces more than 3 times, make this hardness ratio of stainless steel own lower, directly the material of phase mutual friction use can stand long reciprocating friction and can not damage stainless surface, and then has influence on the sealing and the use of pump.
4, be the nitride coatings of chromium or chromium because of what adopt, the working surface that can guarantee the pump housing and piston still keeps the metallic lustre of nature, improve the anti-metal intergranular corrosion ability of the pump housing and piston, do not influenced the corrosion resistance and the sterilization stability of the pump housing and piston.
In a word, owing to adopted the Austenitic Stainless Steel of anti-metal intergranular corrosion to do base material, and carry out accurate chromium or chromium nitride film plating at substrate surface, improve material surface intensity and hardness, strengthened wear-resistant, the turbid ability of corrosion resistant, and the antiseepage slag, good seal performance, the margin of safety height, and because high-accuracy processing makes metering more accurate.Do not have O-ring seal simultaneously, make structure become simply, the loss of having avoided the cushion rubber wearing and tearing to bring when reducing cost, has improved efficient.
Below in conjunction with drawings and Examples this patent is further specified.
Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is an embodiment's of the present utility model structural representation.
Embodiment
In actual use, the fluid guidance port of the turnover fluid of reserving on the pump housing can be located at multiple different situations such as pump housing side, bottom and top, the situations that also comprise simultaneously the fluid guidance port of the fluid guidance port of single turnover fluid or two turnover fluids, promptly one enters the drain import of fluid and drain outlet that one is extruded fluid.Below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and effect thereof that foundation the utility model is provided, describe in detail as after.
See also Fig. 1, a kind of stainless steel of band coating does not have the seal ring plunger metering pump, comprise the pump housing 1, piston 2, the pump housing is formed with the chromium or the chromium nitride coating 12 of physical vapor deposition or the preparation of physical chemistry CVD (Chemical Vapor Deposition) method by austenite stainless steel base 11 with at austenite stainless steel base internal surface, piston is formed with the chromium or the chromium nitride coating 22 of physical vapor deposition or the preparation of physical chemistry CVD (Chemical Vapor Deposition) method by austenite stainless steel base 21 with at the Austenitic Stainless Steel outer surface of matrix, the pump housing and piston are on the working surface that contacts with each other, maintain 1～20 micron gap, the fluid guidance port that is reserved with the turnover fluid on the pump housing is to be reserved in of pump housing top to enter the drain import 3 of fluid and drain outlet 4 that one is extruded fluid, and in drain import and drain outlet port one one-way valve 5 is housed respectively, 6.When pulling during piston 2, the negative pressure of generation is opened the one-way valve 5 of drain inlet, and fluid enters cylndrical surface in the pump housing through drain import and one-way valve, finishes the feed liquor and the gage work of fluid like this.When promoting piston, the pressure of generation squeezes the fluid in the moving pump housing, and opens the one-way valve 6 in drain outlet port simultaneously, and fluid is extruded by piston through one-way valve and outlet, finishes extruding of fluid like this.
Adopt the Austenitic Stainless Steel of anti-metal intergranular corrosion, mainly comprise and contain Cr about 18% in the steel, Ni 8%～10%, about 0.1% o'clock of C, stainless steel with stable austenite structure, promptly 304,316,316L, 317 grades are done the base material of the pump housing and piston, at first stainless steel substrate is carried out precision machining, the control gap that guarantees the pump housing and piston is in 1～20 micron scope, after stainless steel substrate is through accurate processing, by PVD (physics vapor phase deposition), PCVD (physical chemistry vapor phase deposition) technology, carry out accurate chromium or chromium nitride film plating (overlay film) on the stainless steel substrate surface, make material surface intensity and hardness improve greatly, improve wear-resistant ability, the turbid performance of the corrosion resistant of reinforcing material.The high-precision processing of part guarantees that the gap in 1～20 micron, does not have seal ring between the pump housing and the piston, but in the stainless steel material that has guaranteed the employing steam sterilizing, avoided the cushion rubber wear problem that has cushion rubber to bring.
Claims (2)
1. the stainless steel of a band coating does not have the seal ring plunger metering pump, comprise the pump housing, piston, it is characterized in that: the described pump housing is formed with the chromium or the chromium nitride coating of physical vapor deposition or physical chemistry vapor deposition by the austenite stainless steel base with at austenite stainless steel base internal surface, piston is formed with the chromium or the chromium nitride coating of physical vapor deposition or physical chemistry vapor deposition by the austenite stainless steel base with at the Austenitic Stainless Steel outer surface of matrix, the pump housing and piston are on the working surface that contacts with each other, maintain 1～20 micron gap, on the pump housing, be reserved with the fluid guidance port of turnover fluid.
2. the stainless steel of band coating according to claim 1 does not have the seal ring plunger metering pump, it is characterized in that: described fluid guidance port is to be reserved in of pump housing top to enter the drain import of fluid and drain outlet that one is extruded fluid, and in drain import and drain outlet port one one-way valve is housed respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520123011 CN2869375Y (en) | 2005-11-11 | 2005-11-11 | Coated stainless steel seal-ring-free plunger metering pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520123011 CN2869375Y (en) | 2005-11-11 | 2005-11-11 | Coated stainless steel seal-ring-free plunger metering pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2869375Y true CN2869375Y (en) | 2007-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520123011 Expired - Fee Related CN2869375Y (en) | 2005-11-11 | 2005-11-11 | Coated stainless steel seal-ring-free plunger metering pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2869375Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408122B (en) * | 2008-11-20 | 2011-05-11 | 张家口百通环保科技有限公司 | Metering transportation method and apparatus for abstracting, metering and releasing liquid |
| CN103470464A (en) * | 2013-08-27 | 2013-12-25 | 深圳市百欧森环保科技开发有限公司 | High-pressure plunger pump |
| CN103975161A (en) * | 2011-12-12 | 2014-08-06 | 株式会社岛津制作所 | Liquid feed pump and liquid chromatograph |
| IT201700075757A1 (en) * | 2017-07-06 | 2019-01-06 | Acqua Brevetti S R L | PERFORMED STRUCTURE OF DOSING PUMP AND DEVICE, FOR THIS STRUCTURE, DRAWING AND PUMPING OF THE LIQUID TO BE DOSED |
| CN109253077A (en) * | 2018-10-26 | 2019-01-22 | 无锡书谱尔精密机械科技有限公司 | Rotary valve pump |
-
2005
- 2005-11-11 CN CN 200520123011 patent/CN2869375Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408122B (en) * | 2008-11-20 | 2011-05-11 | 张家口百通环保科技有限公司 | Metering transportation method and apparatus for abstracting, metering and releasing liquid |
| CN103975161A (en) * | 2011-12-12 | 2014-08-06 | 株式会社岛津制作所 | Liquid feed pump and liquid chromatograph |
| US9689384B2 (en) | 2011-12-12 | 2017-06-27 | Shimadzu Corporation | Liquid feed pump and liquid chromatograph |
| CN103470464A (en) * | 2013-08-27 | 2013-12-25 | 深圳市百欧森环保科技开发有限公司 | High-pressure plunger pump |
| CN103470464B (en) * | 2013-08-27 | 2016-12-28 | 深圳市百欧森环保科技开发有限公司 | A kind of high pressure plunger water pump |
| IT201700075757A1 (en) * | 2017-07-06 | 2019-01-06 | Acqua Brevetti S R L | PERFORMED STRUCTURE OF DOSING PUMP AND DEVICE, FOR THIS STRUCTURE, DRAWING AND PUMPING OF THE LIQUID TO BE DOSED |
| CN109253077A (en) * | 2018-10-26 | 2019-01-22 | 无锡书谱尔精密机械科技有限公司 | Rotary valve pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070214 Termination date: 20091211 |