CN212360062U - Pneumatic metering pump - Google Patents
Pneumatic metering pump Download PDFInfo
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- CN212360062U CN212360062U CN202020797537.6U CN202020797537U CN212360062U CN 212360062 U CN212360062 U CN 212360062U CN 202020797537 U CN202020797537 U CN 202020797537U CN 212360062 U CN212360062 U CN 212360062U
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Abstract
The utility model provides a pneumatic measuring pump, be in including the pump body and setting pump cover on the pump body, the inside measurement cavity and the detection cavity that are equipped with of the pump body are equipped with guiding disc, guide bar, float in the measurement cavity, and the guiding disc is located the top of measurement cavity, the lower extreme of guiding disc are equipped with the overranging sealing washer, and float and guide bar sliding connection are equipped with the sensor board in the detection cavity, and the float is close to the inside that detects cavity one side and is equipped with magnet. The utility model provides a pneumatic measuring pump, simple structure, the design is compact, and the accurate measurement problem of pump sending corrosive fluids is solved to the key, adopts the measuring means of high accuracy to detect the internal flow variation of pump, only needs to provide compressed air just can realize large-traffic, high accuracy pump sending as power.
Description
Technical Field
The utility model belongs to the technical field of the measuring pump, specifically be a pneumatic measuring pump.
Background
Metering pumps are common machines for fluid delivery, and are widely used in various industries due to the functions of both pumps and metering equipment.
The commonly used metering pump adopts a plunger piston structure, the fluid flow is metered by utilizing the gap difference generated by the relative motion between the plunger piston and the cylinder body, and the precision is reduced due to the abrasion caused by the reciprocating relative motion between the plunger piston and the cylinder body; in addition, because of the high requirements on the sealing element and the complex structure, the manufacturing cost is high and the reliability is poor when special fluids, especially corrosive fluids, are conveyed.
The Chinese patent network discloses a pneumatic metering pump (No. CN209800181U), which comprises a pump body, wherein a metering chamber and a detection chamber are arranged in the pump body, a freely movable liquid level floater is arranged in the metering chamber, and magnetic steel is arranged on one side, close to the detection chamber, in the liquid level floater; the detection chamber is provided with a stepping motor, an output shaft of the stepping motor is connected with a screw rod which can synchronously rotate with the output shaft, one side of the screw rod is fixed with a guide rod which is arranged in parallel with the screw rod, the screw rod is provided with a slide block which can move up and down along with the rotation of the screw rod, and the other side of the slide block is sleeved on the guide rod in a sliding way; a detection plate is arranged on one side, close to the magnetic steel in the metering chamber, of the sliding block, and a magnetic sensor is arranged on the detection plate. The pneumatic metering pump of the technical scheme has the advantages of high measurement precision and stable working performance, but has a complex structure and high production cost.
SUMMERY OF THE UTILITY MODEL
To the problem pointed out in the background art, the utility model provides a simple structure, measurement accuracy height, stable performance's pneumatic measuring pump.
The technical scheme of the utility model is realized like this:
the utility model provides a pneumatic measuring pump, includes the pump body and sets up pump cover on the pump body, be equipped with air inlet and gas outlet on the pump cover, the bottom of the pump body is equipped with inlet and liquid outlet, its characterized in that: the pump body is inside to be equipped with the measurement cavity and to detect the cavity, air inlet, gas outlet, inlet, liquid outlet all with measurement cavity intercommunication sets up, the measurement cavity with it sets up to detect the cavity interval, be equipped with guiding disc, guide bar, float in the measurement cavity, the guiding disc is located the top of measurement cavity, the lower extreme of guiding disc is equipped with the overrange sealing washer, the guide bar with the inside wall fixed connection of measurement cavity, the bottom of guide bar with the bottom fixed connection of measurement cavity, the float with guide bar sliding connection, be equipped with the sensor board in the detection cavity, the float is close to the inside of detecting cavity one side is equipped with magnet.
The utility model discloses further set up to: the guide disc is provided with a clamping groove, and the overrange sealing ring is clamped in the clamping groove.
The utility model discloses further set up to: and a sealing ring is arranged between the flow guide disc and the side wall of the metering chamber.
The utility model discloses further set up to: a fixed plate is arranged in the detection chamber, and the sensor plate fixer is arranged on the fixed plate.
The utility model discloses further set up to: the flow guide disc is provided with a plurality of flow guide holes which are uniformly distributed.
The utility model discloses further set up to: a liquid inlet one-way valve is arranged in the liquid inlet, and a liquid outlet one-way valve is arranged in the liquid outlet.
To sum up, the beneficial effects of the utility model are that:
the utility model provides a pneumatic measuring pump, simple structure, the design is compact, and the accurate measurement problem of pump sending corrosive fluids is solved to the key, adopts the measuring means of high accuracy to detect the internal flow variation of pump, only needs to provide compressed air just can realize large-traffic, high accuracy pump sending as power.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is an enlarged view of the structure of part a of the present invention.
Reference numerals: 1. a pump body; 101. a liquid inlet; 102. a liquid outlet; 103. a metering chamber; 104. a detection chamber; 105. a partition plate; 2. a pump cover; 201. an air inlet; 202. an air outlet; 3. a liquid inlet check valve; 4. a liquid outlet one-way valve; 5. a flow guide disc; 501. a flow guide hole; 502. a card slot; 6. a guide bar; 7. a float; 8. a seal ring; 9. an overrange sealing ring; 10. a sensor board; 11. a fixing plate; 12. and a magnet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The present invention is described below with reference to fig. 1-2:
the utility model provides a pneumatic measuring pump, includes the pump body 1 and sets up pump cover 2 on the pump body 1, is equipped with air inlet 201 and gas outlet 202 on the pump cover 2, and air inlet 201 links to each other with negative pressure solenoid valve and vacuum pump, and gas outlet 202 links to each other with malleation solenoid valve and air compressor machine, and the bottom of the pump body 1 is equipped with inlet 101 and liquid outlet 102, is equipped with feed liquor check valve 3 in the inlet 101, is equipped with out liquid check valve 4 in the liquid outlet 102.
The pump body 1 is internally provided with a metering chamber 103 and a detection chamber 104, an air inlet 201, an air outlet 202, a liquid inlet 101 and a liquid outlet 102 are all communicated with the metering chamber 103, and the metering chamber 103 is hermetically arranged and is spaced from the detection chamber 104 by a partition plate 105.
A flow guide disc 5, a guide rod 6 and a floater 7 are arranged in the metering cavity 103, the flow guide disc 5 is positioned at the top end of the metering cavity 103 and is provided with a plurality of flow guide holes 501 which are uniformly distributed, and a sealing ring 8 is arranged between the flow guide disc 5 and the side wall of the metering cavity 103. The lower end of the flow guide disc 5 is provided with a clamping groove 502, and an overrange sealing ring 9 is clamped in the clamping groove 502.
The guide rod 6 is fixedly connected with the inner side wall of the metering chamber 103, the floater 7 is connected with the guide rod 6 in a sliding mode, a sensor plate 10 and a fixing plate 11 are arranged in the detection chamber 104, a magnetic sensor is arranged on the sensor plate 10, and the sensor plate 10 is fixed on the fixing plate 11. The interior of the float 7 on the side close to the detection chamber 104 is provided with a magnet 12.
The magnetic sensors on the sensor board 10 are hall elements or reed switches, and the like, and in order to improve the metering accuracy, the magnetic sensors are uniformly and densely distributed on the circuit board.
By adopting the technical scheme, the negative pressure electromagnetic valve is opened in the suction state of the pump, the pressure in the pump body 1 is lower than the atmospheric pressure, the liquid flows into the metering chamber 103 below the floater 7 through the liquid inlet one-way valve 3, at the moment, the floater 7 is lifted along the guide rod 6, and after the magnetic sensor on the sensor plate 10 detects the magnetic signal of the magnet in the floater 7 in the lifting process, the magnetic signals are sequentially output from bottom to top, so that the position of the magnet 12 is determined, and the height position of the floater 7 is further determined. After the float 7 reaches the set height, the negative pressure electromagnetic valve is closed, air enters the metering chamber 103 above the float 7, so that the air pressure inside and outside the metering chamber 103 is consistent, and the liquid level position is kept.
In the discharge state of the pump, the positive pressure electromagnetic valve is opened, compressed gas in the air compressor enters the pump body 1, the internal pressure of the metering chamber 103 is higher than the external pressure of the metering chamber 103, and then liquid flows out of the pump body 1 through the liquid outlet one-way valve 4. At this time, as the float 7 moves, the magnetic signal of the magnet 12 inside the float 7 is detected by the magnetic sensor, and the magnetic signal is sequentially output from top to bottom, since the inner diameter of the metering chamber 103 is a fixed value, the volume of the discharged liquid can be calculated by calculating the position difference of the float 7, and when the volume of the discharged liquid reaches a set value, the positive pressure electromagnetic valve is closed, so that air enters the metering chamber 103, the air pressure inside and outside the metering chamber 103 is consistent, the liquid is not discharged any more, and one-time metering is completed.
The guiding hole 501 that sets up on the guiding disk 5, can disperse compressed air and get into in the measurement cavity 103, prevent that intensive compressed air flow from directly acting on float 7, make float 7 produce and rock and influence the measurement, sealing washer 8 makes the inside wall of measurement cavity 103 and guiding disk 5 edge seal, overrange sealing washer 9 and guiding disk 5 combine closely, when negative pressure solenoid valve out of control, float 7 moves when the top surpasses the pump range, stop the air to continue to flow behind the float 7 contact overrange sealing washer 9, thereby the protection gas circuit avoids being surveyed the liquid invasion.
The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a pneumatic metering pump, is in including the pump body (1) and setting pump cover (2) on the pump body (1), be equipped with air inlet (201) and gas outlet (202) on pump cover (2), the bottom of the pump body (1) is equipped with inlet (101) and liquid outlet (102), its characterized in that: the pump body (1) is internally provided with a metering cavity (103) and a detection cavity (104), the air inlet (201), the air outlet (202), the liquid inlet (101) and the liquid outlet (102) are communicated with the metering cavity (103), the metering cavity (103) and the detection cavity (104) are arranged at intervals, a flow guide disc (5), a guide rod (6) and a floater (7) are arranged in the metering cavity (103), the flow guide disc (5) is positioned at the top end of the metering cavity (103), the lower end of the flow guide disc (5) is provided with an overrange sealing ring (9), the guide rod (6) is fixedly connected with the inner side wall of the metering cavity (103), the bottom end of the guide rod (6) is fixedly connected with the bottom of the metering cavity (103), the floater (7) is slidably connected with the guide rod (6), and a sensor plate (10) is arranged in the detection cavity (104), and a magnet (12) is arranged in the floater (7) close to one side of the detection chamber (104).
2. A pneumatic metering pump according to claim 1, characterized in that: a clamping groove (502) is formed in the flow guide disc (5), and the overrange sealing ring (9) is clamped in the clamping groove (502).
3. A pneumatic metering pump according to claim 1, characterized in that: and a sealing ring (8) is arranged between the diversion disc (5) and the side wall of the metering chamber (103).
4. A pneumatic metering pump according to claim 1, characterized in that: a fixing plate (11) is arranged in the detection chamber (104), and the sensor plate (10) is fixed on the fixing plate (11).
5. A pneumatic metering pump according to claim 1, characterized in that: the flow guide disc (5) is provided with a plurality of flow guide holes (501) which are uniformly distributed.
6. A pneumatic metering pump according to claim 1, characterized in that: a liquid inlet one-way valve (3) is arranged in the liquid inlet (101), and a liquid outlet one-way valve (4) is arranged in the liquid outlet (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020797537.6U CN212360062U (en) | 2020-05-13 | 2020-05-13 | Pneumatic metering pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020797537.6U CN212360062U (en) | 2020-05-13 | 2020-05-13 | Pneumatic metering pump |
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| Publication Number | Publication Date |
|---|---|
| CN212360062U true CN212360062U (en) | 2021-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020797537.6U Active CN212360062U (en) | 2020-05-13 | 2020-05-13 | Pneumatic metering pump |
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| CN (1) | CN212360062U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175422A (en) * | 2021-05-06 | 2021-07-27 | 上海雅燊电子技术有限公司 | Novel hydraulic metering pump and measuring method thereof |
-
2020
- 2020-05-13 CN CN202020797537.6U patent/CN212360062U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175422A (en) * | 2021-05-06 | 2021-07-27 | 上海雅燊电子技术有限公司 | Novel hydraulic metering pump and measuring method thereof |
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