CN220929601U - Check valve metering pump - Google Patents
Check valve metering pump Download PDFInfo
- Publication number
- CN220929601U CN220929601U CN202322536024.6U CN202322536024U CN220929601U CN 220929601 U CN220929601 U CN 220929601U CN 202322536024 U CN202322536024 U CN 202322536024U CN 220929601 U CN220929601 U CN 220929601U
- Authority
- CN
- China
- Prior art keywords
- guide sleeve
- valve
- core
- check valve
- valve core
- 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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Links
- 239000000919 ceramic Substances 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 11
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
Landscapes
- Check Valves (AREA)
Abstract
The utility model relates to the technical field of metering pumps, in particular to a metering pump with a one-way valve for controlling liquid flow by using the one-way valve. The valve core on the step of the middle section of the valve core moves in the guide hole of the upper guide sleeve, and the valve core below the step of the middle section of the valve core moves in the guide hole of the lower guide sleeve. The utility model adopts a multilayer sealing matched guide sleeve independent structure, so that the input check valve and the output check valve can move smoothly without deviation, and the servo motor is matched with the grinding ball screw, so that the clearance is extremely small, and the precision is high; the ceramic sleeve is used for guiding the ceramic core, so that the wear-resisting gap is small, and the sealing is good.
Description
Technical Field
The utility model relates to the technical field of metering pumps, in particular to a metering pump with a one-way valve, which controls liquid flow by using the one-way valve.
Background
The check valve metering pump is a common metering pump, and the accuracy of the pump is high because the input check valve and the output check valve have the functions of synchronously closing and opening in the working process. The liquid injection and filling device is mainly used for liquid injection and filling in industries of tobacco tar, aqueous solution, medical reagents, food and the like, and has a hunting effect on the aspect of high-precision liquid injection of low-viscosity fluid.
During operation, however, the user has found that the following drawbacks remain:
In the working process, the input and output one-way valves are driven to be opened or closed in a negative pressure mode, the valve core is held only by means of spring reset in the moving process, the input and output one-way valves are unguided, and only one layer of sealing structure is used, so that the valve core has sealing and guiding functions; therefore, the spring is easily deformed due to accumulation of the operational conditions over time, and thus the valve element is deviated and leaked, which has a great negative effect on the accurate metering element.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a metering pump with a check valve, which has accurate metering elements and long service life.
The metering pump comprises a servo motor, a transmission mechanism, a universal joint and a ceramic core, wherein the output end of the servo motor is connected with the ceramic core through the transmission mechanism and the universal joint, and the tail end of the ceramic core is respectively communicated with the input one-way valve and the output one-way valve which are arranged at the other end of the pump; the input check valve/output check valve consists of a valve seat, an upper guide sleeve, a lower guide sleeve, a valve core, a spring and a lock nut, wherein the valve seat, the upper guide sleeve and the lower guide sleeve are sequentially and fixedly connected, the bottom of the lower guide sleeve, a ceramic core and a pump form a closed space, sealing rings are respectively lined on the connecting surfaces of the lower guide sleeve and the lower guide sleeve, the valve core is arranged in the hollow upper guide sleeve and the hollow lower guide sleeve, a raised step is arranged in the middle section of the valve core, the spring is sleeved on the valve core, the lower end of the spring is propped against the upper end surface of the step of the valve core, and the other end of the spring is propped against the bottom of the hollow step in the upper guide sleeve; the valve core above the step of the middle section of the valve core moves in the guide hole of the upper guide sleeve, and the valve core below the step of the middle section of the valve core moves in the guide hole of the lower guide sleeve.
The transmission mechanism is a ball screw;
The outer edge of the ceramic core is sleeved with a ceramic guide sleeve;
the ball screw is guided to the left and the right by a follow-up bearing;
The spring is an SUS316 spring.
The utility model adopts a multilayer sealing matched guide sleeve independent structure, so that the input check valve and the output check valve can move smoothly without deviation, and the servo motor is matched with the grinding ball screw, so that the clearance is extremely small, and the precision is high; the ceramic sleeve is used for guiding the ceramic core, so that the wear-resisting gap is small, and the sealing is good.
Drawings
FIG. 1 is a perspective view of the present utility model;
FIG. 2 is a front view of the present utility model;
FIG. 3 is a cross-sectional view taken in the direction G-G of FIG. 2;
FIG. 4 is a side view of the present utility model;
FIG. 5 is a cross-sectional view in the F-F direction of FIG. 4;
Fig. 6 is a cross-sectional view of the input check valve and the output check valve.
Detailed Description
Referring to fig. 1-6, a check valve metering pump comprises a pump 1, an input check valve 2 and an output check valve 3, wherein the pump 1 is composed of a servo motor 11, a transmission mechanism 12, a universal joint 13 and a ceramic core 14, the output end of the servo motor 11 is connected with the ceramic core 14 through the transmission mechanism 12 and the universal joint 13, and the tail end of the ceramic core 14 is respectively communicated with the input check valve 2 and the output check valve 3 which are arranged at the other end of the pump 1; the output check valve 3 consists of a valve seat 31, an upper guide sleeve 32, a lower guide sleeve 33, a valve core 34, a spring 35 and a lock nut 36, wherein the valve seat 31, the upper guide sleeve 32 and the lower guide sleeve 33 are sequentially and fixedly connected, the bottom of the lower guide sleeve 33, the ceramic core 14 and the pump 1 form a closed space, sealing rings are respectively lined on the connecting surfaces of the lower guide sleeve 33, the valve core 34 is arranged in the hollow upper guide sleeve 32 and the lower guide sleeve 33, a raised step 341 is arranged in the middle section of the valve core 34, the spring 35 is sleeved on the valve core 34, the lower end of the spring 35 props against the upper end face of the step of the valve core 34, and the other end of the spring 35 props against the hollow bottom of the step in the upper guide sleeve 32; the valve core 34 above the step 341 of the middle section of the valve core 34 moves in the guide hole 321 of the upper guide sleeve 32, and the valve core 34 below the step 341 of the middle section of the valve core 34 moves in the guide hole 331 of the lower guide sleeve 33;
The transmission mechanism 12 is a ball screw;
The outer edge of the ceramic core 14 is sleeved with a ceramic guide sleeve 141;
the ball screw is guided to the left and the right by a follow-up bearing;
the spring 35 is a SUS316 spring.
When the utility model is applied, a power supply is started, the servo motor 11 rotates, the output end of the servo motor drives the ceramic core 14 to rotate backwards through the ball screw and the universal joint 13, the movement causes the bottom of the lower guide sleeve 33, the ceramic core 14 and the pump 1 to form a closed space to generate negative pressure, the negative pressure causes the valve core of the input one-way valve 2 to move, the upper spring is pressed, and the liquid inlet of the input one-way valve 2 is opened to feed liquid; meanwhile, as the springs 35 on the input check valve 2 and the output check valve 3 are arranged in opposite directions, the liquid outlet of the output check valve 3 is closed;
When the servo motor 11 drives the ceramic core 14 to rotate forwards, the spring 35 on the output one-way valve 3 is pressed, the liquid outlet of the output one-way valve 3 is opened, and liquid discharge is started; at this time, the liquid inlet is closed under the valve element of the input check valve 2.
The one-in-one-out is a cycle, and the cycle is repeated; because in each cycle, the valve cores of the input check valve 2 and the output check valve 3 move in the guide holes 321 and 331 of the upper guide sleeve 32, the input check valve and the output check valve move smoothly, and the quality of accurate metering is ensured.
Claims (5)
1. The metering pump comprises a servo motor, a transmission mechanism, a universal joint and a ceramic core, wherein the output end of the servo motor is connected with the ceramic core through the transmission mechanism and the universal joint, and the tail end of the ceramic core is respectively communicated with the input one-way valve and the output one-way valve which are arranged at the other end of the pump; the input check valve/output check valve consists of a valve seat, an upper guide sleeve, a lower guide sleeve, a valve core, a spring and a lock nut, wherein the valve seat, the upper guide sleeve and the lower guide sleeve are sequentially and fixedly connected, the bottom of the lower guide sleeve, a ceramic core and a pump form a closed space, sealing rings are respectively lined on the connecting surfaces of the lower guide sleeve and the lower guide sleeve, the valve core is arranged in the hollow upper guide sleeve and the hollow lower guide sleeve, a raised step is arranged in the middle section of the valve core, the spring is sleeved on the valve core, the lower end of the spring is propped against the upper end surface of the step of the valve core, and the other end of the spring is propped against the bottom of the hollow step in the upper guide sleeve; the method is characterized in that: the valve core above the step of the middle section of the valve core moves in the guide hole of the upper guide sleeve, and the valve core below the step of the middle section of the valve core moves in the guide hole of the lower guide sleeve.
2. A check valve metering pump as claimed in claim 1, wherein: the transmission mechanism is a ball screw.
3. A check valve metering pump as claimed in claim 1, wherein: the outer edge of the ceramic core is sleeved with a ceramic guide sleeve.
4. A check valve metering pump as claimed in claim 2, wherein: the ball screw is guided left and right by a follow-up bearing.
5. A check valve metering pump as claimed in claim 1, wherein: the spring is an SUS316 spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322536024.6U CN220929601U (en) | 2023-09-19 | 2023-09-19 | Check valve metering pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322536024.6U CN220929601U (en) | 2023-09-19 | 2023-09-19 | Check valve metering pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220929601U true CN220929601U (en) | 2024-05-10 |
Family
ID=90936388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322536024.6U Active CN220929601U (en) | 2023-09-19 | 2023-09-19 | Check valve metering pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220929601U (en) |
-
2023
- 2023-09-19 CN CN202322536024.6U patent/CN220929601U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |