CN210422907U - Pump head structure of three-phase metering pump - Google Patents
Pump head structure of three-phase metering pump Download PDFInfo
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- CN210422907U CN210422907U CN201920910882.3U CN201920910882U CN210422907U CN 210422907 U CN210422907 U CN 210422907U CN 201920910882 U CN201920910882 U CN 201920910882U CN 210422907 U CN210422907 U CN 210422907U
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Abstract
The pump head structure of a three-phase metering pump comprises 3 pump heads and a transmission box assembly, wherein the 3 pump heads are arranged on the transmission box assembly, the 3 pump heads are uniformly distributed in a plane by taking the transmission box assembly as a center, an included angle between every two adjacent pump heads is 120 degrees, and the adjacent pump heads sequentially work along a time axis at a phase difference of 120 degrees; the transmission case assembly comprises a case body, an eccentric shaft and a deep groove ball bearing, the eccentric shaft is connected with an external driving motor, 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 3 pump heads. This device utilizes 3 pump head evenly distributed to form star type structure, follows the time axis between the adjacent pump head and cooperates the work with 120 degrees phase differences in proper order to the most pulsation that has reduced the measuring pump, and the simple structure of this structure, excellent in use effect, the practicality is strong.
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; in practical application, the pulsation eliminating device can only eliminate most of 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 pump head structure of three-phase measuring pump, the device utilize 3 pump head evenly distributed to constitute star type structure, along the time axis with 120 degrees phase difference work of cooperateing in proper order between the adjacent pump head to reduce the most pulsation of measuring pump, and the simple structure of this structure, excellent in use effect, the practicality is strong.
To achieve the above object, the present invention is implemented as follows:
the pump head structure of the three-phase metering pump is characterized by comprising 3 pump heads and a transmission box assembly, wherein the 3 pump heads are arranged on the transmission box assembly, the 3 pump heads are uniformly distributed in a plane by taking the transmission box assembly as a center, an included angle between every two adjacent pump heads is 120 degrees, and the adjacent pump heads sequentially work along a time axis at a phase difference of 120 degrees; the transmission case assembly comprises a case body, an eccentric shaft and a deep groove ball bearing, the eccentric shaft is connected with an external driving motor, 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 3 pump heads. 3 individual pump head evenly distributed on the transmission case subassembly to form the star type structure with the transmission case subassembly, utilize the characteristic of eccentric shaft, when driving motor drive eccentric shaft rotated, deep groove ball bearing carries out reciprocal promotion operation to every pump head in proper order, and along the time axis with 120 degrees phase difference work of coordinating in proper order between the adjacent pump head, and then the feed liquor and the flowing back of control every pump head reach the purpose of eliminating most pulsation when metering pump during operation.
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 liquid outlet department of pump case, the one end and the deep groove ball bearing 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 connected with the deep groove ball bearing, the other end of the push rod is sleeved on the push rod seat, and the diaphragm is connected with the push rod seat through the back plate. 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 reciprocate, and then the diaphragm at the other end of the push rod is driven to move forwards or backwards in the pump head.
Further, the inlet valve ball comprises an inlet ball seat, an inlet ball body and an inlet ball sleeve, wherein the ball seat, the inlet ball body and the inlet ball sleeve are matched and are sequentially arranged at the liquid inlet of the pump head.
Further, the outlet valve ball comprises an outlet ball body and an outlet ball seat, and the outlet ball body and the outlet ball seat are matched and are sequentially arranged at the liquid outlet of the pump head.
Further, the inlet pipeline of each pump head is communicated with the main pipe of the main inlet, and the liquid outlet pipeline of each pump head is communicated with the main pipe of the main liquid outlet.
Furthermore, an air damper corresponding to the liquid outlet pipeline of each pump head is arranged on the liquid outlet pipeline of each pump head. Each pump head is provided with an air damper corresponding to the pump head, and the air damper is used for absorbing the residual pulsation of the device, so that the metering pump achieves a pulsation-free effect.
The utility model has the advantages that: this device utilizes 3 pump head evenly distributed to form star type structure, follows the time axis between the adjacent pump head and cooperates the work with 120 degrees phase differences in proper order to the most pulsation that has reduced the measuring pump, and the simple structure of this structure, excellent in use effect, the practicality is strong.
Drawings
Fig. 1 is a schematic structural diagram of a pump head structure of a three-phase metering pump according to an embodiment of the present invention.
Fig. 2 is a schematic partial view of a pump head structure of a three-phase metering pump according to an embodiment of the present invention.
Fig. 3 is an exploded view of a pump head structure of a three-phase metering pump according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a pump head structure of a three-phase metering pump in practical application according to an embodiment of 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.
Reference is made to fig. 1-4.
A pump head structure of a three-phase metering pump is characterized by comprising 3 pump heads 1 and a transmission box assembly 2, wherein the 3 pump heads 1 are arranged on the transmission box assembly 2, the 3 pump heads 1 are uniformly distributed in a plane by taking the transmission box assembly 2 as a center, an included angle between every two adjacent pump heads 1 is 120 degrees, and the adjacent pump heads 1 work sequentially along a time axis at a phase difference of 120 degrees; the transmission box assembly 2 comprises a box body 21, an eccentric shaft 22 and a deep groove ball bearing 23, wherein the eccentric shaft 22 is connected with an external driving motor, the deep groove ball bearing 23 is sleeved on the eccentric shaft 22, the eccentric shaft 22 and the deep groove ball bearing 23 are both arranged at the center of the box body 21, and the excircle of the deep groove ball bearing 23 is movably connected with 3 pump heads 1. 3 pump heads 1 evenly distributed on transmission case subassembly 2 to form star type structure with transmission case subassembly 2, utilize the characteristic of eccentric shaft 22, when driving motor drive eccentric shaft 22 rotated, deep groove ball bearing 23 carried out reciprocal promotion operation to every pump head 1 in proper order, and follow the time axis and cooperate the work in proper order with 120 degrees phase differences between the adjacent pump head 1, and then the feed liquor and the flowing back of control every pump head 1, reach the most pulsatory purpose of eliminating the metering pump during operation.
In this embodiment, the case 21 has a star-shaped structure, and the case 21 is adapted to the pump head 1.
In this embodiment, each pump head 1 includes a pump housing 3, a diaphragm 4, a push rod unit 5, an inlet valve ball 6 and an outlet valve ball 7, the diaphragm 4, the push rod unit 5, the inlet valve ball 6 and the outlet valve ball 7 are all disposed in the pump housing 3, the inlet valve ball 6 and the outlet valve ball 7 are respectively disposed at the liquid inlet and the liquid outlet of the pump housing 3, one end of the push rod unit 5 is movably connected with the deep groove ball bearing 23, and the other end of the push rod unit 5 is connected with the diaphragm 4. The reciprocating motion of the advancing and retreating of the diaphragm 4 is controlled by the push rod unit 5, so that the opening or closing of the inlet valve ball 6 and the outlet valve ball 7 is controlled, the liquid inlet and outlet operations of the pump head 1 are realized, namely when the diaphragm 4 retreats, vacuum is gradually formed in the pump head 1, the inlet valve ball 6 is opened, and liquid is sucked; when the diaphragm 4 advances, the inlet ball 6 is closed and the outlet ball 7 is opened and the liquid is discharged.
In this embodiment, the push rod unit 5 includes a push rod 51, a spring 52 and a push rod seat 53, the spring 52 is sleeved on the push rod 51, one end of the push rod 51 is connected to the deep groove ball bearing 23, the other end of the push rod 51 is sleeved on the push rod seat 53, and the diaphragm 4 is connected to the push rod seat 53 through a back plate 54. When the eccentric shaft 22 and the deep groove ball bearing 23 work, the outer circle of the deep groove ball bearing 24 acts on the push rod 51 to drive the push rod 51 to reciprocate, and further drive the diaphragm 4 at the other end of the push rod 51 to move forward or backward in the pump head 1.
In this embodiment, the inlet valve ball 6 comprises an inlet ball seat 61, an inlet ball 62 and an inlet ball sleeve 63, the ball seat 61, the ball 62 and the ball sleeve 63 being adapted and arranged in turn at the inlet of the pump head 1.
In this embodiment, the outlet valve ball 7 comprises an outlet ball body 71 and an outlet ball seat 72, and the outlet ball body 71 and the outlet ball seat 72 are adapted and arranged at the outlet of the pump head 1.
In this embodiment, the inlet pipeline of each pump head 1 is communicated with the main inlet pipe, and the outlet pipeline of each pump head 1 is communicated with the main outlet pipe.
In this embodiment, an air damper corresponding to the liquid outlet pipeline of each pump head is disposed on the liquid outlet pipeline of each pump head.
The utility model has the advantages that: this device utilizes 3 pump head evenly distributed to form star type structure, follows the time axis between the adjacent pump head and cooperates the work with 120 degrees phase differences in proper order to the most pulsation that has reduced the measuring pump, and the simple structure of this 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 (8)
1. The pump head structure of the three-phase metering pump is characterized by comprising 3 pump heads and a transmission box assembly, wherein the 3 pump heads are arranged on the transmission box assembly, the 3 pump heads are uniformly distributed in a plane by taking the transmission box assembly as a center, an included angle between every two adjacent pump heads is 120 degrees, and the adjacent pump heads sequentially work along a time axis at a phase difference of 120 degrees; the transmission case assembly comprises a case body, an eccentric shaft and a deep groove ball bearing, the eccentric shaft is connected with an external driving motor, 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 3 pump heads.
2. A pump head construction for a three phase metering pump according to claim 1, wherein said housing is of a star configuration, said housing being adapted to fit the pump head.
3. A pump head structure of a three-phase metering pump according to 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 disposed in the pump housing, the inlet valve ball and the outlet valve ball are respectively disposed at a liquid inlet and a liquid outlet of the pump housing, one end of the push rod unit is movably connected to the deep groove ball bearing, and the other end of the push rod unit is connected to the diaphragm.
4. A pump head structure of a three-phase metering pump according to claim 3, wherein the push rod unit includes 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 connected to the deep groove ball bearing, the other end of the push rod is sleeved on the push rod seat, and the diaphragm is connected to the push rod seat through a back plate.
5. A pump head structure of a three-phase metering pump according to claim 3, wherein the inlet valve ball comprises an inlet ball seat, an inlet ball body and an inlet ball sleeve, the ball seat, the ball body and the ball sleeve being adapted to be sequentially disposed at the liquid inlet of the pump head.
6. A pump head structure of a three-phase metering pump according to claim 3, wherein the outlet valve ball comprises an outlet ball body and an outlet ball seat, the outlet ball body and the outlet ball seat being adapted to be sequentially disposed at the liquid outlet of the pump head.
7. A pump head structure of a three-phase metering pump according to claim 1, wherein the fluid inlet line of each pump head is in communication with a main fluid inlet manifold, and the fluid outlet line of each pump head is in communication with a main fluid outlet manifold.
8. A pump head structure of a three-phase metering pump according to claim 7, wherein an air damper is provided in each pump head in correspondence with a liquid outlet conduit thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920910882.3U CN210422907U (en) | 2019-06-17 | 2019-06-17 | Pump head structure of three-phase metering pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920910882.3U CN210422907U (en) | 2019-06-17 | 2019-06-17 | Pump head structure of three-phase metering pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210422907U true CN210422907U (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920910882.3U Active CN210422907U (en) | 2019-06-17 | 2019-06-17 | Pump head structure of three-phase metering pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210422907U (en) |
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2019
- 2019-06-17 CN CN201920910882.3U patent/CN210422907U/en active Active
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Address after: 523000 area 401a, likangchang, Hangcheng Avenue, Gushu community, Xixiang street, 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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