Digital metering pump

Abstract

The present application belongs to the technical field of fluid conveying equipment, and particularly relates to a digital metering pump. The present application provides a digital metering pump, which can be cooled by arranging a circuit board, an operation board, a vertical hydraulic end, a motor, a flange, a box unit and a fin unit on the pump body, so that: 1. The circuit board and the operation board can be fully cooled by the fin unit, the motor is exposed, and the motor can also be cooled by the fin unit, so that the cooling performance of the digital metering pump is sufficient, and a larger motor can be used to improve the maximum flow value; 2. The box unit and the motor, which are the two structures most needing waterproof protection, are located at the upper end, and the height thereof is higher than that of the vertical hydraulic end, so that the box unit and the motor are not easily damaged by water.

Description

Technical Field

[0001] This invention belongs to the field of fluid transport equipment technology, and particularly relates to a digital metering pump. Background Technology

[0002] A metering pump is a type of pump with adjustable flow rate. Its most prominent advantage is its ability to maintain a constant flow rate regardless of discharge pressure. Common metering pumps are typically of three types: plunger, mechanical diaphragm, and hydraulic diaphragm. Their structure mainly includes a motor, geared motor, eccentric wheel, plunger, diaphragm, and check valve. The direct operation of flow rate adjustment involves changing the eccentricity of the eccentric wheel, thereby altering the amount of liquid output by the pump per cycle.

[0003] Digital metering pumps are a new type of intelligent metering pump that digitizes and visualizes all the aforementioned flow regulation and flow display operations. Their extended functions may also include remote networking, abnormal alarms, and overload protection, but the pump body structure itself remains largely the same.

[0004] For example, Chinese utility model patent CN212055015U, published on December 1, 2020, discloses a digital metering pump with an automatic flow regulation mechanism. The pump includes a housing, inside which are a microprocessor, a reducer, a drive shaft, and a push rod. Pump head accessories and a control panel with a display function are located on the outer side of the housing. The microprocessor is electrically connected to both the control panel and the reducer. The reducer is driven by the drive shaft via a worm gear mechanism. An eccentric wheel is mounted on the drive shaft, and a crank wheel is rotatably fitted around the eccentric wheel. The crank wheel rotates with the push rod, which is connected to the pump head accessories and drives the pump head accessories through its reciprocating motion.

[0005] The digital metering pump in this utility model patent has the following structure, principle, and advantages: The reducer unit drives the worm gear mechanism, which in turn drives the transmission shaft to rotate. The transmission shaft drives the eccentric wheel on the shaft to rotate, which in turn drives the bearing to oscillate. The bearing drives the crank wheel to oscillate, and the drive wheel drives the push rod to reciprocate. The push rod is equivalent to a piston rod, reciprocating within the cylinder. The cylinder contains liquid, which causes the diaphragm to contract and expand. By changing the pump head volume through the movement of the diaphragm, the flow rate can be adjusted. This utility model can also be remotely controlled, making it highly practical.

[0006] However, in actual use, this digital metering pump still has at least two shortcomings, which are also the technical problems that this invention aims to solve:

[0007] 1. Its microprocessor, reducer, drive shaft and push rod are all housed inside the housing, which results in insufficient heat dissipation of the pump body. Correspondingly, larger motors with greater heat generation cannot be used, which also limits the maximum flow rate of the digital metering pump.

[0008] 2. The height of its microprocessor, reducer, control panel and other structures is roughly equal to the height of the pump head accessories. Therefore, the water outlet at the top of the pump head accessories is relatively easy for water to accidentally enter the entire box, ultimately damaging various electronic and mechanical parts.

[0009] Therefore, in summary, there is an urgent need for a new type of digital metering pump product with sufficient heat dissipation and adequate waterproof performance of the motor and circuit board structure. Summary of the Invention

[0010] This invention provides a digital metering pump that, by incorporating a circuit board, control panel, vertical hydraulic end, motor, flange, housing unit, and heat sink unit on the pump body, achieves the following: 1. The circuit board and control panel can achieve sufficient heat dissipation thanks to the heat sink unit, while the exposed motor can also be cooled by the heat sink unit, ultimately ensuring sufficient heat dissipation performance of the digital metering pump. Furthermore, a larger motor can be used to increase the maximum flow rate; 2. The housing unit and motor, the two structures most requiring waterproof protection, are located at the top, with a height higher than the vertical hydraulic end, ensuring that the housing unit and motor are relatively less susceptible to water damage.

[0011] The technical solution adopted by the present invention to solve the above problems is: a digital metering pump, the structure of which includes a circuit board, an operation panel, a pump body, a hydraulic end disposed on the side of the pump body, a motor disposed on the upper surface of the pump body, and flanges disposed on the pump body and the motor, and further includes a housing unit disposed on the upper surface of the motor and used for mounting the circuit board and the operation panel, and a heat sink unit disposed on the lower surface of the housing unit and the side of the motor.

[0012] A further preferred technical solution is that the housing unit includes an open housing disposed on the upper surface of the motor and with the heat sink unit disposed on the lower surface for mounting the circuit board, a housing cover disposed on the open housing, and wire holes disposed on the open housing for mounting the circuit board and the operating panel.

[0013] A further preferred technical solution is that the heat sink unit includes a vertical heat sink with its upper end disposed on the lower surface of the open box and its side clamping the motor.

[0014] A further preferred technical solution is that the heat sink unit further includes an arc-shaped reinforcing plate disposed on the lower surface of the open housing and the side of the vertical heat sink, and used to clamp the upper end of the motor.

[0015] A further preferred technical solution is that the heat sink unit further includes an arc-shaped heat sink disposed on the vertical heat sink and used to clamp the motor.

[0016] A further preferred technical solution is that: the lower end face of the vertical heat sink is also provided with a screw ring unit for connecting the flange and for protecting the flange from water.

[0017] A further preferred technical solution is that the screw ring unit includes a mounting ring disposed on the lower end face of the vertical heat sink and the upper surface of the flange above, a bolt hole disposed on the mounting ring, and a lower water baffle pipe disposed on the mounting ring and sleeved on the outside of the flange.

[0018] A further preferred technical solution is that the screw ring unit further includes an upper water baffle pipe disposed on the upper surface of the mounting ring and connected to the lower end face of the vertical heat sink.

[0019] A further preferred technical solution is that the screw ring unit also includes an upper flared ring disposed on the lower baffle pipe and used for liquid cooling of the vertical heat sink by receiving splashed liquid.

[0020] A further preferred technical solution is that the number of bolt holes is greater than the number of vertical heat sinks. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the position and structure of the box unit in this invention.

[0023] Figure 3 This is a schematic diagram of the position and structure of the screw ring unit in this invention.

[0024] Figure 4 This is a top-down view showing the position and shape of the upper water-blocking pipe in this invention.

[0025] Figure 5 This is a schematic diagram showing the position and shape of the lower water-blocking pipe in this invention.

[0026] Figure 6 This is a schematic diagram illustrating the usage method of the mounting ring in this invention, which can be removed from the motor.

[0027] Figure 7This is a schematic diagram of the heat sink unit in this invention.

[0028] The meanings of the markings in the diagram are as follows:

[0029] Received splashed liquid a;

[0030] Circuit board 11, control panel 12, pump body 13, hydraulic end 14, motor 15, flange 16;

[0031] Cabinet unit 1, heat sink unit 2, screw ring unit 3;

[0032] Open box 101, box cover 102, wire hole 103, vertical heat sink 201, arc-shaped reinforcing plate 202, arc-shaped heat sink 203, mounting ring 301, bolt hole 302, lower water baffle pipe 303, upper water baffle pipe 304, upper flared ring 305. Detailed Implementation

[0033] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0034] As attached Figure 1-7 As shown, a digital metering pump includes a circuit board 11, an operation panel 12, a pump body 13, a hydraulic end 14 disposed on the side of the pump body 13, a motor 15 disposed on the upper surface of the pump body 13, and a flange 16 disposed on the pump body 13 and the motor 15. It also includes a housing unit 1 disposed on the upper surface of the motor 15 and used to mount the circuit board 11 and the operation panel 12, and a heat sink unit 2 disposed on the lower surface of the housing unit 1 and the side of the motor 15.

[0035] In this embodiment, the circuit board 11, operation panel 12, motor 15, and external power supply are connected as a whole through appropriate wiring, ensuring that the flow rate adjustment of the metering pump can be performed simply by touching or selecting a suitable button on the operation panel 12. Furthermore, the operation panel 12 also needs to display appropriate metering pump operating status information. Thus, the "digitalization" function of the metering pump is fully realized.

[0036] The pump body 13 is a common existing structure, including necessary eccentric wheels, crankshafts, connecting rods and other structures, so that the motor 15 can ultimately change and maintain the flow rate at the hydraulic end 14.

[0037] Furthermore, the hydraulic end 14 and the pump body 13 are integrally formed, and the motor 15 and the pump body 13 are screwed together by their respective flanges 16.

[0038] Furthermore, the housing unit 1 is used to integrate and cover the circuit board 11 and the operation panel 12, as well as their associated wires. The heat sink unit 2 is integrally formed with the housing unit 1 and contacts and clamps the upper part of the motor 15.

[0039] The advantages of this structural relationship include at least the following: 1. The three structures with the greatest heat dissipation requirements, namely the circuit board 11, the operation board 12, and the motor 15, can all dissipate heat quickly through the heat sink unit 2; 2. The installation structure of the housing unit 1 itself can be eliminated; 3. The housing unit 1 is located at the highest point of the entire device, ensuring that the splashing liquid at the hydraulic end 14, which cannot be completely avoided, is less likely to damage the circuit board 11 and the operation board 12.

[0040] In contrast, the waterproof protection requirements for the circuit board 11 and the operation board 12 are greater than those for the motor 15.

[0041] The housing unit 1 includes an open housing 101 disposed on the upper surface of the motor 15 and with the heat sink unit 2 disposed on the lower surface, and used for mounting the circuit board 11; a housing cover plate 102 disposed on the open housing 101; and wire holes 103 disposed on the open housing 101 for mounting the circuit board 11 and the operation panel 12.

[0042] In this embodiment, the box unit 1 is rectangular in shape and is made of lightweight aluminum or stainless steel. The open box 101 and the box cover 102 are installed and closed by screwing or snap-fitting.

[0043] In addition, the number of wire holes 103 is at least three: one is the connecting wire between the circuit board 11 and the operation board 12, the second is the power line on the circuit board 11, and the third is the connecting wire between the circuit board 11 and the motor 15.

[0044] The housing unit 1 is also equipped with a cooling fan, which actively dissipates heat by blowing air inward or drawing air outward.

[0045] The heat sink unit 2 includes a vertical heat sink 201 with its upper end disposed on the lower surface of the open box 101 and its side clamping the motor 15.

[0046] In this embodiment, the vertical heat sink 201 and the open housing 101 are integrally formed and are made of the same material. The vertical heat sink 201 appropriately clamps the vertical side of the motor 15, ensuring that the housing unit 1 is securely installed on the upper surface of the motor 15.

[0047] Furthermore, the vertical side of the motor 15 cannot be completely flat. Therefore, the relative inner sides of the vertical heat sink 201 can be fitted with matching grooves and protrusions based on the protrusions and grooves on the vertical side of the motor 15, thereby further improving the installation stability of the housing unit 1.

[0048] The vertical heat sink 201 has a relatively large length and width to ensure sufficient effective heat dissipation area, and it also has appropriate elasticity to ensure that it can be properly pried open on the vertical side of the motor 15 before installation and removal.

[0049] The heat sink unit 2 also includes an arc-shaped reinforcing plate 202 disposed on the lower surface of the open box 101 and the side of the vertical heat sink 201, and used to clamp the upper end of the motor 15.

[0050] Generally, the existing common motor 15 has a shape of "arc-shaped with a flat head" at the end away from the flange 16. The "flat head" end face is used to stably place the open housing 101, while the "arc-shaped" side is used to engage the arc-shaped reinforcing plate 202, ultimately ensuring that the heat sink unit 2 and the housing unit 1 can be stably installed on the motor 15.

[0051] The specific shape of the arc-shaped reinforcing plate 202 is two right-angled sides plus one "arc-shaped hypotenuse".

[0052] The heat sink unit 2 also includes an arc-shaped heat sink 203 disposed on the vertical heat sink 201 and used to clamp the motor 15.

[0053] In this embodiment, the inner surfaces of the arc-shaped heat sink 203 are made as close as possible to the vertical side of the motor 15, so that the heat dissipation method of the vertical side of the motor 15, which was originally directly exposed, is changed to first conduct heat to the arc-shaped heat sink 203 and then undergo natural cooling.

[0054] It should be noted that if the arc-shaped heat sink 203 has low thermal conductivity, the above-mentioned "cover first, then conduct" heat dissipation method may be counterproductive. Therefore, the arc-shaped heat sink 203 can be made of copper, which has relatively high thermal conductivity, or an appropriate number of heat dissipation fins can be provided on its outer surface.

[0055] Finally, the arc-shaped heat sink 203 can also improve the engagement stability of the heat sink unit 2 on the motor 15.

[0056] The lower end face of the vertical heat sink 201 is also provided with a screw ring unit 3 for connecting the flange 16 and for protecting the flange 16 from water.

[0057] In this embodiment, the flange 16 of the pump body 13 and the flange 16 of the motor 15 are bolted together. At this point, the flange joint and bolt gaps are relatively easy for water to enter, especially since the height of the flange 16 is roughly the same as the height of the water outlet of the hydraulic end 14. Therefore, both flanges 16 also require waterproofing to prevent corrosion and damage to the crank, connecting rod, and other structures inside the pump body 13.

[0058] Therefore, the screw ring unit 3 has at least the following two functions:

[0059] First, the original snap-fit ​​installation method of the heat sink unit 2 is upgraded to a screw connection method, which further improves the installation stability and does not require additional bolts. The screw connection method is achieved by the existing bolts on the flange 16.

[0060] Second, waterproof protection is provided at the flange 16 to prevent rust and damage inside the pump body 13.

[0061] The bolt ring unit 3 includes a mounting ring 301 disposed on the lower end face of the vertical heat sink 201 and the upper surface of the flange 16 above, a bolt hole 302 disposed on the mounting ring 301, and a lower water baffle pipe 303 disposed on the mounting ring 301 and sleeved on the outside of the flange 16.

[0062] In this embodiment, the material of the screw ring unit 3 is the same as that of the vertical heat sink 201. Therefore, the entire screw ring unit 3 is also the heat dissipation part of the circuit board 11, the operation board 12 and the motor 15, which further improves the heat dissipation performance of the digital metering pump, which is very efficient.

[0063] Furthermore, the bolt holes 302 are used to pass through and tighten pre-existing bolts on the flange 16. Also, the mating gap between the upper and lower flanges 16 is located inside the lower baffle pipe 303, ensuring that water is difficult to enter the flanges 16.

[0064] Finally, the inner diameter of the mounting ring 301 can be larger or smaller than the cross-sectional size of the motor 15. The advantage of the former being larger is that the entire screw ring unit 3, together with the heat sink unit 2 and the housing unit 1, can be easily replaced on the motor 15. Conversely, the advantage of the latter being larger is that the overall structure is less likely to fall off or be lost.

[0065] The screw ring unit 3 also includes an upper water baffle 304 disposed on the upper surface of the mounting ring 301 and connected to the lower end face of the vertical heat sink 201.

[0066] In this embodiment, the main function of the upper baffle pipe 304 is to prevent splashing liquid that may leak from the flange bolts. Therefore, the bolt hole 302 is located on the inner side of the upper baffle pipe 304. At this time, the vertical heat sink 201 is directly mounted on the upper baffle pipe 304.

[0067] On the other hand, the width of the vertical heat sink 201 is not limited by the thickness of the upper water baffle 304. The vertical heat sink 201 can protrude significantly inward or outward on the upper water baffle 304 as needed, as long as the vertical heat sink 201 is always in full contact with and engaged with the motor 15.

[0068] The screw ring unit 3 also includes an upper flared ring 305 disposed on the lower baffle pipe 303 and used for liquid cooling of the vertical heat sink 201 by receiving splashed liquid.

[0069] In this embodiment, a small amount of splashed liquid can be blocked and intercepted on the outer ring surfaces of the lower water-blocking pipe 303 and the upper water-blocking pipe 304, and a received splashed liquid a is formed at the connection gap between the upper flared ring 305 and the lower water-blocking pipe 303.

[0070] At this time, the received splashed liquid a can also provide appropriate liquid cooling for the screw ring unit 3, which is quite ingenious. Furthermore, the upper edge of the upper flared ring 305 is lower than the upper edge of the lower baffle pipe 303, therefore the received splashed liquid a is unlikely to enter the pump body 13 and will not damage it. When too much splashed liquid a is received, it flows directly downwards onto the outer surface of the pump body 13, without harming its internal structure.

[0071] The number of bolt holes 302 is greater than the number of vertical heat sinks 201.

[0072] In this embodiment, the vertical heat sink 201 will, in principle, interfere with the bolt tightening operation at the bolt hole 302. Therefore, the interference factors are minimized through the following two methods:

[0073] First, there are more bolt holes 302 than vertical heat sinks 201. For bolt holes 302 where there is a lot of interference or where tightening is difficult, bolts are not installed directly. Instead, ordinary hole plugs or drilled plugs are used to ensure that the pump body 13 and motor 15 are installed stably.

[0074] Secondly, the bolt holes 302 and the vertical heat sink 201 are staggered around the circumference as much as possible to ensure that the flange bolts have more operating space when tightening and loosening.

[0075] Finally, the screw ring unit 3 can improve the heat dissipation performance of the circuit board 11, the operation board 12 and the motor 15, and also provide waterproof protection for the internal mechanical structure of the pump body 13, which is highly efficient.

[0076] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of the present invention. These are non-inventive modifications and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A digital metering pump, comprising a circuit board (11), an operation panel (12), a pump body (13), a hydraulic end (14) disposed on the side of the pump body (13), a motor (15) disposed on the upper surface of the pump body (13), and flanges (16) disposed on the pump body (13) and the motor (15), characterized in that: It also includes a housing unit (1) disposed on the upper surface of the motor (15) and used to mount the circuit board (11) and the operation panel (12), and a heat sink unit (2) disposed on the lower surface of the housing unit (1) and the side of the motor (15). The housing unit (1) includes an open housing (101) disposed on the upper surface of the motor (15) and with the heat sink unit (2) disposed on the lower surface, and used for mounting the circuit board (11), a housing cover plate (102) disposed on the open housing (101), and wire holes (103) disposed on the open housing (101) and used for mounting the circuit board (11) and the operation panel (12). The heat sink unit (2) includes a vertical heat sink (201) with its upper end disposed on the lower surface of the open box (101) and its side clamping the motor (15). The lower end face of the vertical heat sink (201) is also provided with a screw ring unit (3) for connecting the flange (16) and for protecting the flange (16) from water. The bolt ring unit (3) includes a mounting ring (301) disposed on the lower end face of the vertical heat sink (201) and the upper surface of the flange (16) above, a bolt hole (302) disposed on the mounting ring (301), and a lower water baffle pipe (303) disposed on the mounting ring (301) and sleeved on the outside of the flange (16). The screw ring unit (3) also includes an upper flared ring (305) disposed on the lower baffle pipe (303) and used for liquid cooling of the vertical heat sink (201) by receiving splashed liquid. The vertical heat sink (201) and the open housing (101) are integrally formed and are made of the same material. The material of the screw ring unit (3) is the same as that of the vertical heat sink (201). The screw ring unit (3) is also the heat dissipation part of the circuit board (11), the operation board (12) and the motor (15).

2. The digital metering pump according to claim 1, characterized in that: The heat sink unit (2) also includes an arc-shaped reinforcing plate (202) disposed on the lower surface of the open box (101) and the side of the vertical heat sink (201) and used to clamp the upper end of the motor (15).

3. A digital metering pump according to claim 1, characterized in that: The heat sink unit (2) also includes an arc-shaped heat sink (203) disposed on the vertical heat sink (201) and used to clamp the motor (15).

4. A digital metering pump according to claim 1, characterized in that: The screw ring unit (3) also includes an upper water baffle (304) disposed on the upper surface of the mounting ring (301) and connected to the lower end face of the vertical heat sink (201).

5. A digital metering pump according to claim 1, characterized in that: The number of bolt holes (302) is greater than the number of vertical heat sinks (201).

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