CN217002245U - Avoid liquid outlet to hang plunger pump that drips - Google Patents
Avoid liquid outlet to hang plunger pump that drips Download PDFInfo
- Publication number
- CN217002245U CN217002245U CN202220132725.6U CN202220132725U CN217002245U CN 217002245 U CN217002245 U CN 217002245U CN 202220132725 U CN202220132725 U CN 202220132725U CN 217002245 U CN217002245 U CN 217002245U
- Authority
- CN
- China
- Prior art keywords
- liquid outlet
- cavity
- plunger
- liquid
- valve seat
- 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.)
- Active
Links
Images
Landscapes
- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model relates to the field of plunger pumps, in particular to a plunger pump capable of preventing a liquid outlet from dripping.A first cavity is arranged in a first pump body, a first plunger is movably assembled in the first cavity, a valve seat is assembled at one side of the first pump body, and the cavity in the valve seat is communicated with the first cavity; wherein the valve seat is provided with a liquid outlet channel and a liquid inlet channel which are communicated with the cavity inside the valve seat; wherein the liquid outlet channel is provided with a liquid outlet one-way valve, and the liquid inlet channel is provided with a liquid inlet one-way valve; the second plunger is movably assembled in the second cavity through a rebound spring, wherein the valve seat is provided with a pumping flow channel, the first plunger moves along the direction of the first cavity and pushes the second plunger to move along the direction of the second cavity, and the liquid pumped circularly upwards in the second cavity is pressed into the liquid outlet channel. The first plunger moves reversely along the first cavity, and the second plunger moves reversely along the second cavity under the action of the resilience spring force to suck the liquid hanging drops back into the liquid outlet channel; the back-pumping of hanging drops and the accurate liquid metering are ensured.
Description
Technical Field
The utility model relates to the field of plunger pumps, in particular to a plunger pump capable of preventing a liquid outlet from dripping.
Background
After the 21 st century, more and more liquid path equipment is replaced by electronic equipment, and the equipment mostly adopts an automatic control technology without human intervention. At this time, hanging drops are formed on the liquid path and the pipeline head due to the surface tension of the liquid. Assuming that the hanging drop volume is 50uL, when the total liquid output amount is 10mL, the error caused by hanging drops is 0.5 percent, and if the total liquid output amount is 1mL, the error caused by hanging drops is 5 percent. In precision instrumentation, the volume of the dose is usually small, and such errors directly lead to the reproducibility and accuracy of the results. During the liquid removal process, the pipeline usually forms hanging drops due to the surface tension of the liquid, and when the liquid removal volume is small, one hanging drop can cause large errors on the accuracy of the instrument.
Disclosure of Invention
In order to solve the problems, the utility model provides the plunger pump capable of avoiding the dripping at the liquid outlet, which can avoid the dripping, ensure the back pumping of the dripping and also ensure the accurate liquid metering.
In order to achieve the purpose, the utility model adopts the technical scheme that: a plunger pump capable of avoiding dripping at a liquid outlet comprises a first plunger, a first pump body, a valve seat, a second plunger, a rebound spring and a second pump body internally provided with a second cavity; the first pump body is internally provided with a first cavity, the first plunger is movably assembled in the first cavity, the valve seat is assembled at one side of the first pump body, and the cavity in the valve seat is communicated with the first cavity; the valve seat is provided with a liquid outlet channel and a liquid inlet channel which are communicated with the cavity in the valve seat; wherein the liquid outlet channel is provided with a liquid outlet one-way valve, and the liquid inlet channel is provided with a liquid inlet one-way valve; the second pump body is arranged in the valve seat, the second plunger is movably assembled in the second cavity through the rebound spring, the valve seat is also provided with a pumping-back flow passage, and the pumping-back flow passage is communicated with one side of the liquid outlet channel; the first plunger moves along the direction of the first cavity and pushes the second plunger to move along the direction of the second cavity, so that the pumping channel is in a positive pressure state, and the liquid pumped circularly upwards in the second cavity is pressed into the liquid outlet channel; the first plunger moves reversely along the first cavity, the second plunger moves reversely along the second cavity under the action of the resilience spring force, and the pumping-back flow passage is in a negative pressure state, namely, liquid hanging drops is pumped back into the liquid outlet channel.
Further, a liquid outlet joint is assembled in the liquid outlet channel, the liquid outlet one-way valve comprises a first return spring and a first one-way valve plug, one end of the first return spring is clamped at an input port of the liquid outlet joint, the other end of the first return spring is connected with the first one-way valve plug, the first one-way valve plug is plugged at the edge of an output port of the liquid outlet channel under the action of the first return spring, a drawing-back opening is formed in one side of the liquid outlet channel, and the drawing-back opening is always communicated with the drawing-back flow channel.
Further, the inlet channel is furnished with the inlet joint, and wherein the inlet check valve includes second reset spring and the one-way valve plug of second, and wherein the edge at the inlet channel input port is established to the one end card of second reset spring, and the other end and the one-way valve plug of second reset spring are connected, and the delivery outlet at the inlet joint is blocked under the second reset spring effort to the second one-way valve plug.
Furthermore, the top of the second pump body is connected with a positioning block, positioning steps are arranged on two sides of the surface of the valve seat, two sides of the positioning block of the second pump body are respectively clamped on the positioning steps, and the top of the second plunger penetrates through the positioning block and extends into the first cavity.
Further, the valve seat is further provided with a spring groove communicated with one side of the withdrawal flow channel, one end of the rebound spring abuts against the bottom of the second plunger, and the other end of the rebound spring abuts against the bottom of the spring groove.
Further, the outer bottom of first pump body has still wrapped up a protecting sheathing through the lateral wall, and this protecting sheathing's bottom passes through the sealing washer laminating on the disk seat.
Furthermore, the liquid outlet joint is connected with a liquid outlet pipe.
Furthermore, the liquid inlet joint is connected with a liquid inlet pipe.
The utility model has the beneficial effects that: the utility model mainly solves the problem of hanging drops at a liquid outlet of a plunger pump (when the size of the liquid outlet is small or the viscosity of liquid is large, a drop of liquid can be hung after the liquid outlet is stopped), and the main principle is as follows: when the first plunger piston is pushed to the bottom of the first cavity and touches the second plunger piston to continue to push towards the second cavity, the liquid with the same volume as that pumped last time is pushed into the liquid outlet pipe by the pumping-back flow passage; when the internal liquid is pushed away by the pumping-back flow passage; the second plunger is moved in the opposite direction by the rebound spring, and the hanging drops at the liquid outlet can be pumped back into the liquid outlet pipe by the pumping-back flow passage in the negative pressure state, so that the pumping-back of the hanging drops is ensured, and the accurate liquid metering is also ensured.
Drawings
Fig. 1 is a schematic cross-sectional structure of the present invention.
The reference numbers illustrate: the pump comprises a first plunger 1, a first pump body 2, a first cavity 21, a protective casing 22, a sealing ring 221, a second pump body 3, a second cavity 31, a second plunger 4, a positioning block 41, a rebound spring 5, a spring groove 51, a withdrawal flow channel 6, a withdrawal opening 61, a first one-way valve plug 71, a second one-way valve plug 72, a first return spring 81, a second return spring 82, a liquid outlet joint 91, a liquid inlet joint 92, a liquid outlet channel 101, a liquid inlet channel 102, a valve seat 11, a liquid outlet pipe 12, a liquid outlet pipe opening 121 and a liquid inlet pipe 13.
Detailed Description
Referring to fig. 1, the present invention relates to a plunger pump for preventing dripping at a liquid outlet, including a first plunger 1, a first pump body 2, a valve seat 11, a second plunger 4, a rebound spring 5, and a second pump body 3 with a second cavity 31 disposed therein; a first cavity 21 is arranged in the first pump body 2, the first plunger 1 is movably assembled in the first cavity 21, the valve seat 11 is assembled on one side of the first pump body 2, and the cavity in the valve seat 11 is communicated with the first cavity 21; wherein the valve seat 11 is provided with a liquid outlet channel 101 and a liquid inlet channel 102 which are communicated with the cavity inside the valve seat 11; wherein the liquid outlet channel 101 is provided with a liquid outlet one-way valve, and the liquid inlet channel 102 is provided with a liquid inlet one-way valve; the second pump body 3 is arranged in the valve seat 11, the second plunger 4 is movably assembled in the second cavity 31 through the rebound spring 5, the valve seat 11 is also provided with a pumping-back flow passage 6, and the pumping-back flow passage 6 is communicated with one side of the liquid outlet channel 101; the first plunger 1 moves along the direction of the first cavity 21 and pushes the second plunger 4 to move along the direction of the second cavity 31, the pumping-back flow channel 6 is in a positive pressure state, and the liquid pumped back in the second cavity 21 in an upper circulation mode is pressed into the liquid outlet channel 101; the first plunger 1 moves reversely along the first cavity 21, the second plunger 4 moves reversely along the second cavity under the action of the force of the rebound spring 5, and the pumping channel is in a negative pressure state, namely, liquid hanging drops is pumped back into the liquid outlet channel.
. The liquid outlet joint 91 is connected with a liquid outlet pipe 12. The liquid inlet joint 92 is connected with a liquid inlet pipe 13.
The utility model mainly solves the problem that a liquid outlet pipe opening 121 of a plunger pump hangs drops (when the size of the liquid outlet pipe opening 121 at the tail end of a liquid outlet pipe is smaller or the viscosity of liquid is larger, a drop of liquid can hang on the liquid outlet pipe opening at the tail end of the liquid outlet pipe after the pump stops liquid outlet), and the main principle is as follows: when the first plunger 1 is pushed to the bottom in the direction of the first cavity 21 and touches the second plunger 4 to continue to push in the direction of the second cavity 31, the pumping-back flow passage 6 pushes the liquid with the same volume pumped back last time into the liquid outlet pipe 12; when the internal liquid is pushed away by the pumping-back flow passage 6, the pumping-back flow passage 6 is changed into a negative pressure state; the rebound spring 5 moves the second plunger 4 in the opposite direction, and the pumping-back flow passage 6 in the negative pressure state can pump the hanging drops of the liquid outlet pipe opening 121 back into the liquid outlet pipe 12, so that the hanging drop pumping-back is ensured, and the accurate liquid metering is also ensured.
Further, the liquid outlet channel 101 is provided with a liquid outlet joint 91, the liquid outlet check valve comprises a first return spring 81 and a first check valve plug 71, wherein one end of the first return spring 81 is clamped at an input port of the liquid outlet joint 91, the other end of the first return spring 81 is connected with the first check valve plug 71, the first check valve plug 71 is plugged at the edge of an output port of the liquid outlet channel 101 under the action of the first return spring 81, a drawing back opening 61 is arranged at one side of the liquid outlet channel 101, and the drawing back opening 61 is always communicated with the drawing back flow channel 6. Further, the liquid inlet connector 92 is assembled in the liquid inlet channel 102, wherein the liquid inlet check valve includes a second return spring 82 and a second check valve plug 72, one end of the second return spring 82 is clamped at the edge of the input port of the liquid inlet channel 102, the other end of the second return spring 82 is connected with the second check valve plug 72, and the second check valve plug 72 plugs the output port of the liquid inlet connector 92 under the acting force of the second return spring 82.
In the application, the specific working process is as follows: the first plunger 1 moves backwards to enlarge the space of the first cavity 21, negative pressure is formed in the first cavity 21, the first one-way valve plug 71 seals the outlet of the liquid outlet channel 101, the second one-way valve plug 72 does not block the liquid inlet channel 102 any more, liquid enters the first cavity 21 through the liquid inlet pipe 13, the liquid inlet joint 92 and the liquid inlet channel 102 in sequence, and after the pressure is balanced, the second one-way valve plug 72 closes the liquid inlet channel 102 under the action of the second return spring 82;
then the first plunger 1 compresses the liquid in the first cavity 21 forwards in the first cavity 21, and the liquid is enabled to form positive pressure; when the pressure is higher than the acting force of the first return spring 81, the first one-way valve plug 71 does not block the liquid outlet channel 101, and the liquid flows out to the liquid outlet pipe 12 through the liquid outlet channel 101, and simultaneously flows out through the pumping back opening 61 and into the second chamber 31 through the pumping back channel 6. The first plunger 1 moves forward continuously and hits the second plunger 4 to push the second plunger 4 to move forward, and the liquid in the second cavity 31 flows into the liquid outlet channel 101 through the back-pumping channel 6. When the first plunger 1 moves backward again, the second plunger 4 moves backward under the action of the rebound spring 5, and the hanging drop is drawn back into the liquid outlet pipe 12 through the drawing back flow passage 6, the liquid outlet joint 91 and the liquid outlet pipe 12.
Further, in order to position the second pump body 3 and avoid pushing the second pump body 3 in the pushing process, the top of the second pump body 3 is connected with a positioning block 41, wherein positioning steps are arranged on two sides of the surface of the valve seat 11, two sides of the positioning block 41 of the second pump body 3 are respectively clamped on the positioning steps, the top of the second plunger 4 penetrates through the positioning block 41 and extends out of the second cavity 31, and the positioning of the second pump body 3 is realized through the positioning block 41.
Further, the valve seat 11 is further provided with a spring groove 51 communicating with one side of the pumping-back flow passage 6, one end of the rebound spring 5 abuts against the bottom of the second plunger 4, and the other end of the rebound spring 5 abuts against the bottom of the spring groove 51. In this embodiment, the rebound spring 5 is secured by being disposed in the spring groove 51.
Further, a protective casing 22 is further wrapped at the bottom outside the first pump body 2 through a side wall, and the bottom of the protective casing 22 is attached to the valve seat 11 through a sealing ring 221. In this embodiment, the first pump body 2 is protected in all directions by the protective casing 22, and the sealing performance is increased by the seal ring 221.
The above embodiments are merely illustrative of the preferred embodiments of the present invention, and not restrictive, and various changes and modifications to the technical solutions of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are intended to fall within the scope of the present invention defined by the appended claims.
Claims (8)
1. The utility model provides a avoid plunger pump of liquid outlet hanging drop which characterized in that: the pump comprises a first plunger, a first pump body, a valve seat, a second plunger, a rebound spring and a second pump body with a second cavity arranged inside; the first pump body is internally provided with a first cavity, the first plunger is movably assembled in the first cavity, the valve seat is assembled at one side of the first pump body, and the cavity in the valve seat is communicated with the first cavity; wherein the valve seat is provided with a liquid outlet channel and a liquid inlet channel which are communicated with the cavity inside the valve seat; wherein the liquid outlet channel is provided with a liquid outlet one-way valve, and the liquid inlet channel is provided with a liquid inlet one-way valve; the second pump body is arranged in the valve seat, the second plunger is movably assembled in the second cavity through the rebound spring, the valve seat is also provided with a pumping-back flow passage, and the pumping-back flow passage is communicated with one side of the liquid outlet channel; the first plunger moves along the direction of the first cavity and pushes the second plunger to move along the direction of the second cavity, so that the pumping-back flow passage is in a positive pressure state, and the pumped-back liquid in the second cavity is pressed into the liquid outlet channel.
2. The plunger pump of claim 1, wherein: the liquid outlet channel is provided with a liquid outlet joint, the liquid outlet one-way valve comprises a first reset spring and a first one-way valve plug, one end of the first reset spring is clamped at an input port of the liquid outlet joint, the other end of the first reset spring is connected with the first one-way valve plug, the first one-way valve plug is plugged at the edge of an output port of the liquid outlet channel under the action of the first reset spring, a drawing-back opening is arranged on one side of the liquid outlet channel, and the drawing-back opening is always communicated with a drawing-back flow channel.
3. The plunger pump of claim 1, wherein: the feed liquor channel is equipped with the feed liquor joint, and wherein the feed liquor check valve includes second reset spring and second one-way valve plug, and wherein the edge at the feed liquor channel input port is established to the one end card of second reset spring, and the other end and the one-way valve plug of second reset spring are connected, and the delivery outlet at the feed liquor joint is blocked under the second reset spring effort to second one-way valve plug.
4. The plunger pump of claim 1, wherein: the top of the second pump body is connected with a positioning block, positioning steps are arranged on two sides of the surface of the valve seat, two sides of the positioning block of the second pump body are respectively clamped on the positioning steps, and the top of the second plunger penetrates through the positioning block and extends out of the second cavity.
5. The plunger pump of claim 1, wherein: the valve seat is further provided with a spring groove communicated with one side of the pumping-back flow passage, one end of the rebound spring abuts against the bottom of the second plunger, and the other end of the rebound spring abuts against the bottom of the spring groove.
6. The plunger pump of claim 1, wherein: the bottom outside the first pump body is further wrapped by a protective shell through the side wall, and the bottom of the protective shell is attached to the valve seat through a sealing ring.
7. The plunger pump of claim 2, wherein: the liquid outlet joint is connected with a liquid outlet pipe.
8. A plunger pump for preventing dripping from a liquid outlet according to claim 3, wherein: the liquid inlet joint is connected with a liquid inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220132725.6U CN217002245U (en) | 2022-01-18 | 2022-01-18 | Avoid liquid outlet to hang plunger pump that drips |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220132725.6U CN217002245U (en) | 2022-01-18 | 2022-01-18 | Avoid liquid outlet to hang plunger pump that drips |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217002245U true CN217002245U (en) | 2022-07-19 |
Family
ID=82390328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220132725.6U Active CN217002245U (en) | 2022-01-18 | 2022-01-18 | Avoid liquid outlet to hang plunger pump that drips |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217002245U (en) |
-
2022
- 2022-01-18 CN CN202220132725.6U patent/CN217002245U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108894942B (en) | A kind of polymer-injecting pump | |
| CN217002245U (en) | Avoid liquid outlet to hang plunger pump that drips | |
| CN208330639U (en) | Three plunger type high-pressure plunger pumps | |
| CN108194302B (en) | Large pump front end strong backflow low resistance composite pump valve | |
| CN115125702A (en) | Liquid pumping structure with small liquid dropping amount | |
| CN208578695U (en) | Prevent the plectane diaphragm type hydraulic diaphragm pump of membrane ruptures | |
| CN208380820U (en) | It is a kind of to reduce remaining pump body structure | |
| CN204476794U (en) | Centrifugal pump automatic liquid sucker | |
| CN206468584U (en) | A kind of water pump slide system pipeline structure | |
| CN108194303B (en) | Small pump strong reflux large pump single injection composite pump valve | |
| CN202392201U (en) | Anti-drip check valve | |
| CN218207015U (en) | Hydraulic oil automatic compensation device for hydraulic diaphragm metering pump | |
| CN108194297B (en) | Low-resistance pumping strong-backflow plane valve compound pump | |
| CN108194300B (en) | Composite pump valve with simultaneous strong backflow of large pump and small pump and simultaneous injection of large pump and small pump | |
| CN214403878U (en) | Controllable one-way valve of liquid inlet for displacement pump | |
| CN215596482U (en) | One-way valve and distributor using same | |
| CN210769177U (en) | Quantitative filling pump for sewage treatment | |
| JP2009236059A (en) | Reciprocating pump with automatic degassing mechanism | |
| CN214196689U (en) | Centrifugal pump for sewage treatment | |
| CN217830517U (en) | Pressurizing sprayer for cleaning vehicle | |
| CN218177420U (en) | Medicine filling device | |
| CN103498953A (en) | Zero leakage inserting installation one-way valve | |
| CN217199646U (en) | Pump head backflow structure | |
| CN210229869U (en) | Computer-controlled liquid injection system | |
| CN209244747U (en) | A kind of hydraulic diaphragm metering pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |