CN200968264Y - Constant rate pump - Google Patents
Constant rate pump Download PDFInfo
- Publication number
- CN200968264Y CN200968264Y CN 200620065711 CN200620065711U CN200968264Y CN 200968264 Y CN200968264 Y CN 200968264Y CN 200620065711 CN200620065711 CN 200620065711 CN 200620065711 U CN200620065711 U CN 200620065711U CN 200968264 Y CN200968264 Y CN 200968264Y
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- China
- Prior art keywords
- spool
- valve seat
- pump housing
- piston
- valve
- 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.)
- Expired - Fee Related
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Abstract
A constant flow pump comprises a pump body, a piston, a reversing valve and a piston driving mechanism. The piston is positioned in the pump body. The reversing valve, positioned on one end of the pump body, comprises a valve seat, a spool and a spool position-switching mechanism. The valve seat is provided with a feed liquid inlet, a liquid outlet and a hole communicated with the pump body. The spool is positioned on the valve seat. The constant flow pump is characterized in that: the cone-shaped spool coordinates with the valve seat through the conical surface; the spool is provided with a liquid channel, one end opening of which is on the side of the spool(conical surface) and is corresponding to the feed liquid inlet and liquid outlet, while the other end opening is on the bottom surface of the spool and is communicated with the pump body. The utility model has a higher feeding quantity accuracy, conveniently realizes the adjustment of feeding quantity and is easy to be washed clean without sanitation dead corner while washing.
Description
Technical field
The utility model relates to a kind of metering pump that is used for the liquid material can.
Background technique
The existing metering pump that is used for the liquid material can exists the feed amount to regulate inconvenient, the sordid problem of the inner cleaning of the pump housing mostly.
A kind of mechanical pump valve that is used for filling liquid of China utility model patent CN2652829Y bulletin, comprise feed liquor valve body, fluid valve body, the pump housing, fluid mouth, liquid inlet port, be located at sebific duct on the liquid inlet port, be located at sebific duct and piston on the fluid mouth, piston is located in the pump housing; Piston is provided with the twice locating slot, is provided with the angle stake positioning ring in the locating slot; Piston nose is provided with seal ring.When piston down moves, form vacuum in the pump housing, liquid enters in the pump housing through liquid inlet port, sebific duct, the feed liquor valve body be located on the liquid inlet port, and the sebific duct that be located on the fluid mouth this moment seals up the fluid mouth because of being subjected to ambient pressure; When pushing away on the piston, liquid is pumped out through fluid mouth, sebific duct, the fluid valve body be located on the fluid mouth, and the sebific duct of being located at this moment on the liquid inlet port seals up liquid inlet port because of the pressure that flowed by liquid; It more than is the process of feed liquor of mechanical pump valve and fluid.This mechanical pump valve has higher feed accuracy of measurement, and the reciprocating motion length that can pass through regulating piston is realized the adjusting of feed amount, but still there are the sordid problem of cleaning in pump housing inside, feed liquor valve inner and fluid valve inner, remaining material can influence the ride quality of pump valve, and can produce substandard product because of quality rotten, that breed bacteria influences the material of follow-up can.
Existing a kind of metering pump, comprise the pump housing, piston and selector valve, piston is located in the pump housing, selector valve is installed in an end of the pump housing, and selector valve comprises valve seat, spool and valve element position switching mechanism, the hole that valve seat is provided with liquid entering hole, liquid outlet and is communicated with the pump housing, its spool is located in the valve seat, cooperate with sphere between spool and the valve seat, change the position of spool, the working state of changeable metering pump by the valve element position switching mechanism.This metering pump has higher feed accuracy of measurement, and the reciprocating motion length that can pass through regulating piston is realized the adjusting of feed amount, but spool still is in the valve seat when cleaning, material between spool and the valve seat in the gap is difficult to clean up, remaining material can influence the ride quality of pump valve, and can produce substandard product because of quality rotten, that breed bacteria influences the material of follow-up can.
Summary of the invention
The purpose of this utility model provides the metering pump that a kind of feed amount is easy to adjust and be easy to clean up.The technological scheme that adopts is as follows:
A kind of metering pump, comprise the pump housing, piston, selector valve and piston drive mechanism, piston is located in the pump housing, selector valve is installed in an end of the pump housing, selector valve comprises valve seat, spool and valve element position switching mechanism, the hole that valve seat is provided with liquid entering hole, liquid outlet and is communicated with the pump housing, and spool is located in the valve seat, it is characterized in that: described spool is circular cone shape, and spool cooperates with valve seat with conical surface; Be provided with fluid passage in the spool, an end opening of fluid passage in the side of spool (being conical surface) and, the other end opening corresponding with liquid entering hole and liquid outlet be communicated with in the bottom surface of spool and with the pump housing.The opening of spool side cooperates with liquid entering hole or liquid outlet on the valve seat; When removing spool, the liquid entering hole on the valve seat, liquid outlet and the hole three who is communicated with the pump housing are communicated with.
Preferred valve element position switching mechanism comprises spool controlling rod and driving mechanism thereof, usually be provided with a mounting hole at the valve seat top, the spool controlling rod is located in the mounting hole, fixedlys connected with spool in the lower end of spool controlling rod, and the upper end is in outside the valve seat and with its driving mechanism and is connected.Make control spool controlling rod rotate, move axially by above-mentioned driving mechanism, the position of changeable spool, thereby the working state of switching metering pump.Control spool controlling rod rotates, axially movable structure (being above-mentioned driving mechanism) belongs to technology well-known to those skilled in the art.For example, rotate the structure that control can adopt gear, tooth bar to cooperate, gear is coaxial to be installed on the spool controlling rod, and the rack and pinion engagement can make gear driven spool controlling rod come back rotation by moving back and forth of tooth bar; Move axially control and can utilize cylinder to realize that the spool controlling rod is connected with cylinder piston rod, cylinder piston rod moves axially the spool controlling rod when flexible.Above-mentioned just example is realized the rotation of spool controlling rod and moves axially also adopting other structure, is not described in detail at this.
Piston drive mechanism is connected with piston and the control piston to-and-fro motion, cooperates the switching of valve element position, can make metering pump feed liquor or fluid; By the regulating piston reciprocating motion length, the feed amount of can regulate metering pump.The structure of control piston to-and-fro motion and regulating piston reciprocating motion length (above-mentioned piston drive mechanism) belongs to prior art, the structure that " the quantitative feed mechanism of stuffer " announced as Chinese patent CN2795036Y relates to; Also can utilize cylinder, cylinder piston rod is connected with above-mentioned piston, but correspondingly to-and-fro motion of driven plunger when cylinder piston rod is flexible, and the stroke of regulating cylinder piston rod is the adjusting piston reciprocating motion length; Also can adopt other structure.This part technology is well-known to those skilled in the art, is not described in detail at this.
In order to strengthen being connected and being convenient between selector valve and the pump housing metering pump being installed on the frame of filling machine, selector valve can be installed in a connecting seat, connecting base is connected with an end of the pump housing, and the valve seat bottom surface contacts with the end face seal of the pump housing.Usually the connecting base top is provided with the through hole corresponding with the mounting hole at valve seat top, and above-mentioned spool controlling rod is in this through hole and its upper end is in outside the connecting base.
For enhanced leaktightness, prevent that liquid material from leaking, can be between the above-mentioned valve seat and the pump housing, between valve seat and the connecting base, between the through hole at spool controlling rod and connecting base top seal ring be set, piston is provided with the piston ring that cooperates with the pump housing.
The utility model just can guarantee that by keeping the fixing reciprocating motion length of piston each feed amount is constant, has higher feed accuracy of measurement; Can realize the adjusting of feed amount by the reciprocating motion length of regulating piston, convenient and easy; Spool can be moved down during cleaning, spool and valve seat are separated, the internal surface of the outer surface of spool and fluid passage inwall, valve seat, the internal surface of the pump housing and piston end face all fully contact with cleaning solution, there is not the corner or spot as yet untouched by a clean-up campaign, be easy to metering pump is thoroughly cleaned up, noresidue material in the metering pump can be guaranteed the quality of the material of follow-up can.
Description of drawings
Fig. 1 is the structural representation (feed liquor state) of the utility model one preferred embodiment;
Fig. 2 is the schematic representation that goes out liquid status embodiment illustrated in fig. 1;
Fig. 3 is the schematic representation of cleaning state embodiment illustrated in fig. 1.
Embodiment
As Fig. 1～shown in Figure 3, this metering pump comprises the pump housing 1, piston 2, selector valve 3 and piston drive mechanism, piston 2 is located in the pump housing 1, selector valve 3 is installed in an end of the pump housing 1, selector valve 3 comprises valve seat 31, spool 32 and valve element position switching mechanism, valve seat 31 is provided with liquid entering hole 33, liquid outlet 34 and the hole 35 that is communicated with the pump housing 1, spool 32 is located in the valve seat 31, spool 32 is circular cone shape, spool 32 cooperates with valve seat 31 with conical surface 36, be provided with fluid passage 37 in the spool 32, an end opening of fluid passage 37 is in the side of spool 32 (being conical surface 36) and corresponding with liquid entering hole 33 and liquid outlet 34, the other end opening is communicated with in the bottom surface of spool 32 and with the pump housing 1.The opening of spool 32 sides cooperates with liquid entering hole 33 or liquid outlet 34 on the valve seat 31; When removing spool 32, the liquid entering hole 33 on the valve seat 31, liquid outlet 34 and hole 35 threes that are communicated with the pump housing 1 are communicated with.
The valve element position switching mechanism comprises spool controlling rod 38 and driving mechanism thereof.Selector valve 3 is installed in the connecting base 4, and connecting base 4 is connected with an end of the pump housing 1, and valve seat 31 bottom surfaces contact with the end face seal of the pump housing 1; Valve seat 31 tops are provided with mounting hole 39, and connecting base 4 tops are provided with the through hole 41 corresponding with the mounting hole 39 at valve seat 31 tops; Spool controlling rod 38 is located in mounting hole 39 and the through hole 41, fixedlys connected with spool 32 in its lower end, and the upper end is in outside the connecting base 4 and with its driving mechanism and is connected; Be provided with seal ring 5 between the end face of valve seat 31 bottom surfaces and the pump housing 1, be provided with seal ring 6,7 between spool controlling rod 38 and the through hole 41, be provided with seal ring 8 between valve seat 31 and the connecting base 4.Driving mechanism can make spool controlling rod 38 rotate, move axially, and control spool controlling rod 38 rotates, axially movable structure belongs to technology well-known to those skilled in the art.For example, rotate the structure that control adopts gear, tooth bar to cooperate, gear is coaxial to be installed on the spool controlling rod, and the rack and pinion engagement can make gear driven spool controlling rod come back rotation by moving back and forth of tooth bar; Move axially control and utilize cylinder to realize that the spool controlling rod is connected with cylinder piston rod, cylinder piston rod moves axially the spool controlling rod when flexible.
Piston drive mechanism is connected with piston 2 and control piston 2 to-and-fro motion; By the regulating piston reciprocating motion length, the feed amount of can regulate metering pump.The structure that piston drive mechanism can adopt " the quantitative feed mechanism of stuffer " as Chinese patent CN2795036Y bulletin to relate to.Piston 2 is provided with the piston ring 9 that cooperates with the pump housing 1.
As shown in Figure 1, during feed liquor, rotational valve core controlling rod 38 makes the opening of spool 32 sides dock with liquid entering hole 33, fluid passage 37 is communicated with liquid entering hole 33 with the pump housing 1, and spool 32 sides closely contact and liquid outlet 34 are closed with valve seat 31, descending with back piston 2, in the pump housing 1, produce vacuum, liquid material enters in the pump housing 1 through liquid entering hole 33, fluid passage 37; As shown in Figure 2, during fluid, rotational valve core controlling rod 38 makes the opening of spool 32 sides dock with liquid outlet 34, fluid passage 37 is communicated with liquid outlet 34 with the pump housing 1, and spool 32 sides closely contact and liquid entering hole 33 are closed with valve seat 31, with pushing away on the back piston 2, the liquid material in the pump housing 1 is pumped out through fluid passage 37, liquid outlet 34.Above-mentioned is the process (comprising feed liquor and fluid) of a feed of metering pump, so moves in circles, and can constantly carry out feed.The size of feed amount is by the decision of the reciprocating motion length of piston 2, by the reciprocating motion length of regulating piston 2, and the size of can regulate feed amount.
As shown in Figure 3, during cleaning, promote spool controlling rod 38 downwards, spool 32 and valve seat 31 are separated, cleaning solution enters the inside of the selector valve 3 and the pump housing 1 from liquid entering hole 33, flows out from liquid outlet 34 then; In the cleaning process, the internal surface of the outer surface of spool 32 and fluid passage 37 inwalls, valve seat 31, the internal surface of the pump housing 1 and the end face of piston 2 all fully contact with cleaning solution, do not have the corner or spot as yet untouched by a clean-up campaign, so cleaning solution can thoroughly clean up metering pump.After cleaning finishes, in the time of carrying out feed, upwards spur spool controlling rod 38, spool 32 is cooperated once more with valve seat 31 get final product.
Claims (7)
1, a kind of metering pump, comprise the pump housing, piston, selector valve and piston drive mechanism, piston is located in the pump housing, selector valve is installed in an end of the pump housing, selector valve comprises valve seat, spool and valve element position switching mechanism, the hole that valve seat is provided with liquid entering hole, liquid outlet and is communicated with the pump housing, and spool is located in the valve seat, it is characterized in that: described spool is circular cone shape, and spool cooperates with valve seat with conical surface; Be provided with fluid passage in the spool, an end opening of fluid passage in the side of spool and, the other end opening corresponding with liquid entering hole and liquid outlet be communicated with in the bottom surface of spool and with the pump housing.
2, metering pump according to claim 1, it is characterized in that: described valve element position switching mechanism comprises spool controlling rod and driving mechanism thereof, the valve seat top is provided with a mounting hole, the spool controlling rod is located in the mounting hole, fixedly connected with spool in the lower end of spool controlling rod, the upper end is in outside the valve seat and with its driving mechanism and is connected.
3, metering pump according to claim 1 and 2 is characterized in that: described selector valve is installed in a connecting seat, and connecting base is connected with an end of the pump housing, and the valve seat bottom surface contacts with the end face seal of the pump housing.
4, metering pump according to claim 2 is characterized in that: described selector valve is installed in a connecting seat, and connecting base is connected with an end of the pump housing, and the valve seat bottom surface contacts with the end face seal of the pump housing; The connecting base top is provided with the through hole corresponding with the mounting hole at valve seat top, and the spool controlling rod is in this through hole and its upper end is in outside the connecting base.
5, metering pump according to claim 1 and 2 is characterized in that: be provided with seal ring between the described valve seat and the pump housing, piston is provided with the piston ring that cooperates with the pump housing.
6, metering pump according to claim 3 is characterized in that: be provided with seal ring between described valve seat and the connecting base.
7, metering pump according to claim 4 is characterized in that: be provided with seal ring between the through hole at described spool controlling rod and connecting base top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620065711 CN200968264Y (en) | 2006-10-16 | 2006-10-16 | Constant rate pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620065711 CN200968264Y (en) | 2006-10-16 | 2006-10-16 | Constant rate pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200968264Y true CN200968264Y (en) | 2007-10-31 |
Family
ID=38967833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620065711 Expired - Fee Related CN200968264Y (en) | 2006-10-16 | 2006-10-16 | Constant rate pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200968264Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102349559A (en) * | 2011-09-17 | 2012-02-15 | 常州市汉华厨具有限公司 | Sausage stuffer |
| CN103147974A (en) * | 2013-03-05 | 2013-06-12 | 上海韬林实业有限公司 | Stainless steel piston pump for filling |
| CN104948771A (en) * | 2015-06-26 | 2015-09-30 | 徐笑浓 | Metering device with reversing valve |
| CN107539507A (en) * | 2017-05-17 | 2018-01-05 | 苏州康乐辉医药科技有限公司 | A kind of special filling apparatus of suspension |
-
2006
- 2006-10-16 CN CN 200620065711 patent/CN200968264Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102349559A (en) * | 2011-09-17 | 2012-02-15 | 常州市汉华厨具有限公司 | Sausage stuffer |
| CN102349559B (en) * | 2011-09-17 | 2014-03-26 | 常州市汉华厨具有限公司 | Sausage stuffer |
| CN103147974A (en) * | 2013-03-05 | 2013-06-12 | 上海韬林实业有限公司 | Stainless steel piston pump for filling |
| CN103147974B (en) * | 2013-03-05 | 2015-09-09 | 上海韬林实业有限公司 | Filling stainless steel reciprocating pump |
| CN104948771A (en) * | 2015-06-26 | 2015-09-30 | 徐笑浓 | Metering device with reversing valve |
| CN107539507A (en) * | 2017-05-17 | 2018-01-05 | 苏州康乐辉医药科技有限公司 | A kind of special filling apparatus of suspension |
| CN107539507B (en) * | 2017-05-17 | 2019-10-01 | 苏州康乐辉医药科技有限公司 | A kind of dedicated filling apparatus of suspension |
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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: 20071031 Termination date: 20131016 |