CN210396992U - Non-pulsation metering pump - Google Patents
Non-pulsation metering pump Download PDFInfo
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- CN210396992U CN210396992U CN201920928459.6U CN201920928459U CN210396992U CN 210396992 U CN210396992 U CN 210396992U CN 201920928459 U CN201920928459 U CN 201920928459U CN 210396992 U CN210396992 U CN 210396992U
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Abstract
The utility model provides a no pulsation measuring pump, it includes gear motor, pump head and transmission case subassembly, gear motor and transmission case subassembly drive are connected, the pump head sets up on the transmission case subassembly, the quantity of pump head is N, N more than or equal to 3 and N are the integer, every pump head uses the transmission case subassembly to be at plane evenly distributed as the center, use between the adjacent pump head to work in proper order along time interval phi 360/N's phase difference, and all be provided with rather than corresponding air damper on the liquid outlet pipeline of every pump head, the inlet pipeline of every pump head all is linked together with total inlet female pipe, the liquid outlet pipeline of every pump head all is linked together with total liquid outlet female pipe. This device utilizes 3 at least pump heads to form star type structures, and cooperates the work in proper order with certain phase difference along the time axis between the adjacent pump head to reduce most pulsation of device, correspond respectively at every pump head in addition and set up an air damper, absorb all the other pulsations, thereby realize no pulsive measuring pump.
Description
Technical Field
The utility model relates to a measuring pump field.
Background
The Metering pump (Metering pump) is also called a quantitative pump or a proportional pump, the flow rate of the Metering pump can be adjusted in a stepless mode within the range of 0-100%, and the Metering pump is a special volumetric pump for conveying liquid (particularly corrosive liquid). The metering pump is one of fluid conveying machines, and is characterized by that it can retain a constant flow rate irrelevant to discharge pressure, and can simultaneously implement the functions of conveying, metering and regulating so as to simplify production process. Several media can be input into the process flow according to an accurate proportion for mixing by using a plurality of metering pumps, and the metering pumps are widely applied to various industrial fields of petrochemical industry, pharmacy, food and the like nowadays due to the outstanding characteristics of the metering pumps.
The existing metering pumps uniformly belong to the category of reciprocating pumps, because the plunger of the pump does reciprocating motion, the input medium can generate pulsation which can bring adverse effects to chemical reactions in the process flow, and impact and noise can be generated to a flow pipeline due to the water hammer effect. If the mode of installing the energy accumulator on the outlet pipeline is adopted, only part of pulsation can be eliminated, and the application occasion with high requirement on eliminating the pulsation phenomenon can not be met.
The prior art discloses a flow-adjustable pulsation-free high-precision diaphragm metering pump (application number: 200720038531.5), which consists of a motor, a transmission case body and 5 pump heads; the device is mainly characterized in that 5 pump heads are uniformly distributed at one end of a transmission box body, liquid inlets of the 5 pump heads are connected with 1 main liquid inlet pipe, and liquid outlets of the 5 pump heads are connected with 1 main liquid outlet pipe; the transmission part in the transmission box body adopts a single eccentric wheel and single connecting rod structure and is precisely matched and connected through a bearing, the sliding friction motion between the traditional cam connecting rods is changed into rolling friction motion, and the transmission part can simultaneously drive the diaphragms in 5 cylinder bodies to sequentially perform drawing and pressing motions; the metering pump realizes the function of no pulsation, ensures the accuracy of the metering pump, and greatly improves the control precision and quality of the technical process. However, the device adopts 5 pump heads, the structure is complex, and the failure rate of the device is high.
The prior art discloses a pulsation eliminating device (application number: 201820165281.X) for a diaphragm metering pump, which is arranged on a conveying pipeline and close to the outlet end of the diaphragm metering pump, and comprises a pipe body, pipe caps matched with the pipe body are fixedly connected to two ends of the pipe body respectively, and a buffer chamber is defined by the pipe body and the pipe caps; one pipe cap is connected with a connecting piece used for connecting the conveying pipeline, and the connecting piece is of a hollow structure so that the buffer chamber is communicated with the interior of the conveying pipeline.
The pulsation eliminating device of the diaphragm metering pump is externally installed on a conveying pipeline, but in practical application, the pulsation eliminating device can only eliminate partial pulsation and cannot completely eliminate the pulsation of the metering pump.
Disclosure of Invention
To the weak point that exists among the above-mentioned technique, the utility model aims at providing a pulsation-free metering pump, the device utilize 3 at least pump heads to form star type structure, and cooperate the work in proper order with certain phase difference along the time axis between the adjacent pump head to reduce the most pulsation of device, correspond respectively at every pump head in addition and set up an air damper, absorb all the other pulsations, thereby realize pulsation-free metering pump, and the device simple structure, excellent in use effect, the practicality is strong.
To achieve the above object, the present invention is implemented as follows:
the utility model provides a no pulsation measuring pump, it includes gear motor, pump head and transmission case subassembly, gear motor and transmission case subassembly drive are connected, the pump head sets up on the transmission case subassembly, its characterized in that the quantity of pump head is N, and N more than or equal to 3 and N are the integer, and every pump head uses the transmission case subassembly to work in proper order in the plane as the center, uses between the adjacent pump head to work in proper order along time interval phi 360/N's phase difference, and all be provided with rather than corresponding air damper on the liquid outlet pipeline of every pump head, and the inlet pipeline of every pump head all is linked together with total inlet mother pipe, and the liquid outlet pipeline of every pump head all is linked together with total liquid outlet mother pipe. Utilize many pump heads (N > ═ 3) to work in proper order with certain phase difference, reduced the measuring pump most pulsation that the during operation produced, in addition every pump head all is provided with rather than corresponding air damper, utilizes air damper to absorb remaining pulsation to make the measuring pump of this application reach no pulsation purpose. The speed reducing motor is the prior art, wherein the flow of the metering pump can be adjusted by the existing brushless motor controller, such as speed regulation by a built-in potentiometer, external analog voltage speed regulation, external potentiometer speed regulation, PWM speed regulation and pulse frequency speed regulation.
Further, when the quantity of pump head was 3, the contained angle between every adjacent pump head was 120, and 3 pump heads work in proper order with 120 degrees phase differences. When the number of the pump heads of the metering pump is 3, the optimal embodiment is that the structural design of the metering pump is relatively simple, when the number of the pump heads is more than 4, the structure of the metering pump is relatively more complex, and the pulsation reducing effect of the metering pump is basically not greatly changed from that of the 3 pump heads. Specifically, when 4 pump heads are arranged, the included angle between adjacent pump heads is 90 degrees, and the 4 pump heads are matched with each other in sequence along a time axis with a phase difference of 90 degrees; when setting up to 5 pump heads, the contained angle of adjacent pump head is 72, and 5 pump heads cooperate the work in proper order along 72 degrees phase positions of time axis.
Further, the air damper includes casing and upper cover, the casing is hourglass hopper-shaped, and the bottom of casing is linked together with the liquid outlet pipeline of pump head, the upper cover lid closes the top at the casing. The air damper and the liquid outlet pipeline are enclosed to form a closed cavity, air is filled in the air damper, a reverse acting force is provided for liquid in the liquid outlet pipeline, other pulsation is eliminated, and the liquid is stably output.
Further, the transmission case assembly comprises a case body, an eccentric shaft and a deep groove ball bearing, the deep groove ball bearing is sleeved on the eccentric shaft, the eccentric shaft and the deep groove ball bearing are both arranged at the center of the case body, and the excircle of the deep groove ball bearing is movably connected with the pump head. By utilizing the characteristic of the eccentric shaft, when the speed reduction motor drives the eccentric shaft to rotate, the eccentric shaft and the deep groove ball bearing sequentially push each pump head to and fro, so that the liquid inlet and the liquid discharge of the pump heads are controlled.
Further, the box is star-shaped structure, the box and pump head looks adaptation.
Furthermore, every pump head all includes pump case, diaphragm, push rod unit, inlet valve ball and outlet valve ball all set up in the pump case, inlet valve ball and outlet valve ball set up respectively in the inlet and the play liquid mouth department of pump case, the one end and the transmission case subassembly swing joint of push rod unit, the other end of push rod unit is connected with the diaphragm. The reciprocating motion of the advancing and retreating of the diaphragm is controlled by the push rod unit, so that the opening or closing of the inlet valve ball and the outlet valve ball is controlled, the liquid inlet and outlet operations of the pump head are realized, namely when the diaphragm retreats, vacuum is gradually formed in the pump head, the inlet valve ball is opened, and liquid is sucked; when the diaphragm advances, the inlet valve ball closes and the outlet valve ball opens, and the liquid is discharged.
Further, the push rod unit comprises a push rod, a spring and a push rod seat, the spring is sleeved on the push rod, one end of the push rod is movably connected with the transmission box, the other end of the push rod is sleeved on the push rod seat, and the push rod seat is connected with the diaphragm. When the eccentric shaft and the deep groove ball bearing work, the excircle of the deep groove ball bearing acts on the push rod to drive the push rod to do reciprocating motion, and then the diaphragm at the other end of the push rod is driven to move forwards or backwards.
Further, the measuring pump still includes the base, the base includes basement and a plurality of A-frame, and the lower extreme of every A-frame is connected with the basement, and the upper end of every A-frame is connected and is formed a supporting plane, the transmission case subassembly is fixed on supporting plane.
Furthermore, a triangular groove is formed in each triangular support, and the liquid inlet pipeline of each pump head penetrates through the triangular groove to be connected with the corresponding pump head.
Further, the pump head is connected with the liquid outlet pipeline and the liquid inlet pipeline corresponding to the pump head through the heavy three-piece type hoop. Utilize the clamp connection, sealed effectual and can install and dismantle the pipeline of measuring pump fast.
The utility model has the advantages that: this device utilizes 3 at least pump heads to form star type structures, and follows the time axis between the adjacent pump head and cooperate the work in proper order with certain phase difference to reduce the most pulsation of device, correspond respectively at every pump head in addition and set up an air damper, absorb all the other pulsations, thereby realize no pulsive measuring pump, and the device simple structure, excellent in use effect, the practicality is strong.
Drawings
Fig. 1 is a schematic structural view of a pulsation-free metering pump implemented by the present invention.
Fig. 2 is a top view of a pulseless metering pump in accordance with the present invention.
Fig. 3 is an exploded view of a pulsation-free metering pump according to the present invention.
Fig. 4 is a schematic structural diagram of a base in a pulseless metering pump implemented in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-4, the pulseless metering pump realized by the present invention includes a gear motor 1, pump heads 2 and a transmission case assembly 3, the gear motor 1 is drivingly connected with the transmission case assembly 3, the pump heads 2 are disposed on the transmission case assembly 3, and the pulseless metering pump is characterized in that the number of the pump heads 2 is N, N is greater than or equal to 3 and N is an integer, each pump head 2 is uniformly distributed in a plane with the transmission case assembly 3 as a center, adjacent pump heads 2 sequentially work with a phase difference of 360 °/N along a time interval Φ, a liquid inlet pipe 4 of each pump head 2 is communicated with a main liquid inlet pipe 41, a liquid outlet pipe 5 of each pump head 2 is communicated with a main liquid outlet pipe 51, and an air damper 6 corresponding to the liquid outlet pipe 5 is disposed on each pump head 2. Utilize many pump heads 2(N > ═ 3) to work in proper order with certain phase difference, reduced the measuring pump most pulsation that the during operation produced, in addition every pump head 2 all is provided with rather than corresponding air damper 6, utilize air damper 6 to absorb remaining pulsation to make the measuring pump of this application reach no pulsation purpose. The speed reducing motor 1 is a conventional motor, wherein the flow rate of the metering pump can be adjusted by a conventional brushless motor controller, such as a built-in potentiometer, an external analog voltage, an external potentiometer, a PWM and a pulse frequency.
In this embodiment, when the number of pump heads 2 is 3, the included angle between each adjacent pump head 2 is 120 °, and the 3 pump heads work sequentially with a phase difference of 120 degrees.
In this embodiment, the air damper 6 includes a housing 61 and an upper cover 62, the housing 61 is funnel-shaped, the bottom end of the housing 61 is communicated with the liquid outlet pipe 5 of the pump head 2, and the upper cover 62 covers the top end of the housing 61. The air damper 6 and the liquid outlet pipeline 5 are enclosed to form a closed cavity, air is filled in the air damper 6, a reverse acting force is provided for liquid in the liquid outlet pipeline 5, other pulsation is eliminated, and the liquid is stably output.
In this embodiment, the gear box assembly 3 includes a box 31, an eccentric shaft 32 and a deep groove ball bearing 33, the deep groove ball bearing 33 is sleeved on the eccentric shaft 32, the eccentric shaft 32 and the deep groove ball bearing 33 are both disposed at the center of the box 31, and the outer circle of the deep groove ball bearing 33 is movably connected with the pump head 2. By utilizing the characteristics of the eccentric shaft 32, when the gear motor 1 drives the eccentric shaft 32 to rotate, the eccentric shaft 32 and the deep groove ball bearing 33 sequentially push each pump head 2 to and fro, thereby controlling the liquid inlet and the liquid outlet of the pump heads 2.
In this embodiment, the housing 31 has a star-shaped structure, and the housing 31 is adapted to the pump head 2.
In this embodiment, each pump head 2 includes a pump housing 21, a diaphragm 22, a push rod unit 23, an inlet valve ball 24 and an outlet valve ball 25, the diaphragm 22, the push rod unit 23, the inlet valve ball 24 and the outlet valve ball 25 are all disposed in the pump housing 21, the inlet valve ball 24 and the outlet valve ball 25 are respectively disposed at the liquid inlet and the liquid outlet of the pump housing 21, one end of the push rod unit 23 is movably connected with the transmission housing assembly 3, and the other end of the push rod unit 23 is connected with the diaphragm 22. The reciprocating motion of the advancing and retreating of the diaphragm 22 is controlled by the push rod unit 23, so that the opening or closing of the inlet valve ball 24 and the outlet valve ball 25 is controlled, the liquid inlet and outlet operations of the pump head 2 are realized, namely when the diaphragm 22 retreats, vacuum is gradually formed in the pump head 2, the inlet valve ball 24 is opened, and liquid is sucked; when the diaphragm 22 advances, the inlet ball 24 is closed and the outlet ball 25 is opened and the liquid is discharged.
In this embodiment, the push rod unit 23 includes a push rod 231, a spring 232 and a push rod seat 233, the spring 232 is sleeved on the push rod 231, one end of the push rod 231 is movably connected with the transmission case 3, the other end of the push rod 231 is sleeved on the push rod seat 233, and the push rod seat 233 is connected with the diaphragm 22. When the eccentric shaft 32 and the deep groove ball bearing 33 work, the excircle of the deep groove ball bearing 33 acts on the push rod 231 to drive the push rod 231 to reciprocate, and further drive the diaphragm 22 at the other end of the push rod 231 to advance or retreat.
In this embodiment, the metering pump further includes a base 7, the base 7 includes a base 71 and a plurality of triangular supports 72, a lower end of each triangular support 72 is connected to the base 71, an upper end of each triangular support 72 is connected to form a supporting plane 73, and the transmission case assembly 3 is fixed on the supporting plane 73.
In this embodiment, a triangular groove 74 is formed in each triangular bracket 72, and the inlet pipe 4 of each pump head 2 passes through the triangular groove 74 and is connected with its corresponding pump head 2.
In this embodiment, the pump head 2 and its corresponding outlet pipe 5 and inlet pipe 4 are connected by a heavy three-piece clamp 8. Utilize the clamp connection, sealed effectual and can install and dismantle the pipeline of measuring pump fast.
When the number of the pump heads 2 of the metering pump is 3, which is an optimized embodiment, the structural design of the metering pump is relatively simple, when the number of the pump heads is more than 4, the structure of the metering pump is relatively more complex, and the pulsation reducing effect of the metering pump is basically not greatly changed from that of the 3 pump heads. Specifically, when 4 pump heads are arranged, the included angle between adjacent pump heads is 90 degrees, and the 4 pump heads are matched with each other in sequence along a time axis with a phase difference of 90 degrees; when setting up to 5 pump heads, the contained angle of adjacent pump head is 72, and 5 pump heads cooperate the work in proper order along 72 degrees phase positions of time axis.
The utility model has the advantages that: this device utilizes 3 at least pump heads to form star type structures, and follows the time axis between the adjacent pump head and cooperate the work in proper order with certain phase difference to reduce the most pulsation of device, correspond respectively at every pump head in addition and set up an air damper, absorb all the other pulsations, thereby realize no pulsive measuring pump, and the device simple structure, excellent in use effect, the practicality is strong.
The above is only a preferred embodiment of the present invention, but the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a no pulsation measuring pump, it includes gear motor, pump head and transmission case subassembly, gear motor and transmission case subassembly drive are connected, the pump head sets up on the transmission case subassembly, its characterized in that the quantity of pump head is N, and N more than or equal to 3 and N are the integer, and every pump head uses the transmission case subassembly to work in proper order in the plane as the center, uses between the adjacent pump head to work in proper order along time interval phi 360/N's phase difference, and all be provided with rather than corresponding air damper on the liquid outlet pipeline of every pump head, and the inlet pipeline of every pump head all is linked together with total inlet mother pipe, and the liquid outlet pipeline of every pump head all is linked together with total liquid outlet mother pipe.
2. A pulseless metering pump according to claim 1, wherein when the number of said pump heads is 3, the included angle between each adjacent pump head is 120 °, and the 3 pump heads operate sequentially with a phase difference of 120 °.
3. The pulseless metering pump of claim 1, wherein the air damper comprises a housing and a top cover, the housing is funnel-shaped, a bottom end of the housing is communicated with the liquid outlet pipeline of the pump head, and the top cover covers a top end of the housing.
4. The pulseless metering pump of claim 1, wherein the drive box assembly comprises a box body, an eccentric shaft and a deep groove ball bearing, the deep groove ball bearing is sleeved on the eccentric shaft, the eccentric shaft and the deep groove ball bearing are both arranged at the center of the box body, and the outer circle of the deep groove ball bearing is movably connected with the pump head.
5. The pulseless metering pump of claim 4, wherein said housing is of a star configuration, said housing being adapted to a pump head.
6. The pulseless metering pump of claim 1, wherein each pump head comprises a pump housing, a diaphragm, a push rod unit, an inlet valve ball and an outlet valve ball, the diaphragm, the push rod unit, the inlet valve ball and the outlet valve ball are all arranged in the pump housing, the inlet valve ball and the outlet valve ball are respectively arranged at a liquid inlet and a liquid outlet of the pump housing, one end of the push rod unit is movably connected with the transmission housing assembly, and the other end of the push rod unit is connected with the diaphragm.
7. The pulseless metering pump of claim 6, wherein the push rod unit comprises a push rod, a spring and a push rod seat, the spring is sleeved on the push rod, one end of the push rod is movably connected with the transmission case, the other end of the push rod is sleeved on the push rod seat, and the push rod seat is connected with the diaphragm.
8. The pulseless metering pump of claim 1, wherein the metering pump further comprises a base, the base comprising a base and a plurality of triangular supports, a lower end of each triangular support being connected to the base, an upper end of each triangular support being connected to form a support surface, the drive housing assembly being secured to the support surface.
9. The pulseless metering pump of claim 8, wherein each triangular bracket has a triangular groove therein, and the inlet pipe of each pump head passes through the triangular groove and is connected to its corresponding pump head.
10. The pulseless metering pump of claim 1, wherein said pump heads are connected to their respective outlet and inlet lines by heavy duty three piece clips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920928459.6U CN210396992U (en) | 2019-06-17 | 2019-06-17 | Non-pulsation metering pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920928459.6U CN210396992U (en) | 2019-06-17 | 2019-06-17 | Non-pulsation metering pump |
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| CN210396992U true CN210396992U (en) | 2020-04-24 |
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| CN201920928459.6U Active CN210396992U (en) | 2019-06-17 | 2019-06-17 | Non-pulsation metering pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131123A (en) * | 2019-06-17 | 2019-08-16 | 深圳市协鸿环保设备有限公司 | A kind of Pulseless metering pump |
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2019
- 2019-06-17 CN CN201920928459.6U patent/CN210396992U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131123A (en) * | 2019-06-17 | 2019-08-16 | 深圳市协鸿环保设备有限公司 | A kind of Pulseless metering pump |
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Address after: 523000 area 401a, Lijiang factory, Hangcheng Avenue, Gushu community, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Dawsones fluid technology (Shenzhen) Co.,Ltd. Address before: 518000 area 401a, Lijiang factory, Hangcheng Avenue, Gushu community, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN XIEHONG ENVIRONMENTAL PROTECTION EQUIPMENT Co.,Ltd. |
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