Diaphragm type metering pump, heat preservation mechanism and working method

Abstract

The invention belongs to the technical field of metering pumps, and particularly relates to a diaphragm type metering pump, a heat preservation mechanism and a working method. A liquid discharge channel and a liquid inlet channel are respectively arranged at the top end and the bottom end of the liquid circulation cavity; the driving mechanism is arranged in the liquid flowing cavity; a diaphragm in the driving mechanism is suitable for pumping liquid into the liquid circulation cavity through the liquid inlet channel during contraction, and the diaphragm is suitable for discharging the liquid through the liquid discharging channel during expansion. The heat preservation mechanism is arranged on the inner wall of the liquid drainage channel; a circulation plate in the heat preservation mechanism is suitable for rotating when the diaphragm expands to push the liquid to flow and be discharged out of the liquid discharging channel so as to generate shearing force on the circulating liquid.

Description

Technical Field

[0001] This invention belongs to the field of metering pump technology, specifically relating to diaphragm metering pumps, insulation mechanisms, and working methods. Background Technology

[0002] A diaphragm metering pump is a fluid transport device that uses a drive component to cause the diaphragm to reciprocate and deform, creating periodic volume changes within the pump chamber, thereby enabling the intake and discharge of the medium.

[0003] However, diaphragm metering pumps have certain technical limitations when pumping temperature-sensitive liquids such as spinning solutions. Specifically, during the pump's discharge phase, as the liquid flows out of the pump chamber through the discharge valve, a sudden drop in liquid pressure causes a "flash evaporation" effect, and the liquid exchanges heat with the relatively low-temperature pump body and piping components, resulting in a significant drop in the temperature of the pumped liquid. When the pumped medium is a spinning solution, the temperature drop can cause its viscosity to increase beyond the allowable range, leading to pressure fluctuations and uneven yarn output at the spinneret micro-orifices, severely affecting production stability. Existing technologies mostly employ external heating methods, which suffer from problems such as delayed thermal response and limited heating effect on the fluid core.

[0004] Therefore, a diaphragm metering pump, a heat preservation mechanism, and a working method are designed to solve the technical problem of thermal response lag in the existing technology that uses external heat tracing.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0006] This disclosure provides at least one diaphragm metering pump, a heat preservation mechanism, and a working method.

[0007] In a first aspect, embodiments of this disclosure provide a diaphragm metering pump, comprising: The pump body has a liquid flow chamber on its outer wall; The top and bottom of the liquid flow chamber are respectively provided with a drain channel and a liquid inlet channel; The drive mechanism is disposed inside the liquid flow chamber; wherein The diaphragm in the drive mechanism is adapted to draw liquid into the liquid flow chamber through the inlet channel during contraction, and the diaphragm is adapted to discharge liquid through the outlet channel during expansion; and A heat preservation mechanism is installed on the inner wall of the drainage channel; wherein The flow plate in the insulation mechanism is adapted to rotate to generate shear force on the flowing liquid as the diaphragm expands and pushes the liquid flow out of the drain channel.

[0008] In one optional embodiment, the heat preservation mechanism includes: A baffle plate is connected to the inner wall of the drainage channel via a short shaft, and a gap is provided between the lower end face of the baffle plate and the upper end face of the flow plate. The interior of the flow plate is provided with a plurality of spiral channels circumferentially arranged along the axial direction of the flow plate; and A pair of reset components are arranged symmetrically on the outer wall of the flow plate; wherein When the diaphragm expands and pushes the liquid flow out of the drain channel, the liquid passes through the spiral flow channel and drives the flow plate to rotate, thereby generating a shearing force on the flowing liquid. When the diaphragm contracts, each reset component pushes the flow plate to rotate and reset.

[0009] In one optional implementation, each of the reset components includes: A limiting block is provided on the inner wall of the drainage channel; A driving block is disposed on the outer wall of the flow plate, and an arc-shaped rod is provided on the end face of the driving block facing the corresponding limiting block; and Each of the aforementioned arc-shaped rods has a return spring fitted on its outer wall; wherein When the diaphragm expands, the flow plate rotates, causing the corresponding drive block to rotate closer to the corresponding limit block and compress the corresponding reset spring; and When the diaphragm contracts, each reset spring rebounds and pushes the corresponding drive block to reset.

[0010] In one optional implementation, the drive mechanism includes: A drive motor is mounted on the outer wall of the pump body, and the output end of the drive motor is connected to a rotating shaft; wherein The rotating shaft penetrates the outer wall of the pump body, and an eccentric wheel is provided on the outer wall of the end of the rotating shaft located inside the pump body; and The push rod is horizontally positioned inside the pump body and slidably connected to the inner wall of the pump body; wherein The drive motor is adapted to drive the rotating shaft and eccentric wheel to rotate when started, thereby pushing the push rod toward the liquid flow chamber through the eccentric wheel.

[0011] In one optional embodiment, a diaphragm is provided inside the liquid flow chamber; A driven rod is horizontally disposed on the end face of the diaphragm facing the push rod, and the driven rod is connected to the push rod; A fixing member is provided on the inner wall of the liquid flow chamber, and the driven rod passes through the fixing member and is slidably connected to the fixing member; wherein The push rod is adapted to push the driven rod to compress the diaphragm as it moves toward the liquid flow chamber, thereby causing the diaphragm to expand and discharging liquid from the drain channel.

[0012] In one optional embodiment, a drive spring is provided on the outer wall of the fixing member, and the two ends of the drive spring are respectively connected to the fixing member and the driven rod; wherein After the eccentric wheel rotates and disengages from the push rod, the drive spring resets and pulls the driven rod and push rod back to their original positions, thereby causing the diaphragm to contract.

[0013] In one optional embodiment, both the drain channel and the inlet channel are provided with a one-way flow mechanism, and each one-way flow mechanism includes: A limiting platform, wherein a blocking ball is provided on the upper surface of the limiting platform; and A limiting element is positioned above the sealing ball.

[0014] Secondly, this disclosure also provides a heat preservation mechanism for a diaphragm metering pump, comprising: A flow plate is installed inside the drainage channel; A baffle plate is connected to the inner wall of the drainage channel via a short shaft, and a gap is provided between the lower end face of the baffle plate and the upper end face of the flow plate. The interior of the flow plate is provided with a plurality of spiral channels circumferentially arranged along the axial direction of the flow plate; and A pair of reset components are arranged symmetrically on the outer wall of the flow plate; wherein When the diaphragm expands, it pushes the liquid flow out of the drain channel. The liquid passes through the spiral flow channel and drives the flow plate to rotate. When the diaphragm contracts, each reset component pushes the flow plate to rotate and reset.

[0015] In one optional implementation, each of the reset components includes: A limit block is installed on the inner wall of the drainage channel; A driving block is disposed on the outer wall of the flow plate, and an arc-shaped rod is provided on the end face of the driving block facing the corresponding limiting block; and Each of the aforementioned arc-shaped rods has a return spring fitted on its outer wall; wherein When the diaphragm expands, the flow plate rotates, causing the corresponding drive block to rotate closer to the corresponding limit block and compress the corresponding reset spring; and When the diaphragm contracts, each reset spring rebounds and pushes the corresponding drive block to reset.

[0016] Thirdly, this disclosure also provides a method for operating a diaphragm metering pump, the method comprising: By starting the drive motor, its output end drives the rotating shaft and eccentric wheel to rotate. When the eccentric wheel rotates to contact the push rod, it pushes the push rod to move. By pushing the push rod to move, the driven rod moves to push the diaphragm to expand and squeeze the space in the liquid flow chamber, thereby discharging the liquid through the drain channel; As the liquid flows through the spiral channel within the flow plate, it causes the flow plate to rotate, thereby agitating the liquid and generating shear force.

[0017] The beneficial effects of this invention are that, by providing a heat preservation mechanism, when the liquid flows through the flow plate, the flow plate rotates, causing shear force to be generated in the flowing liquid. The heat generated by this shear force can directly act on the fluid core, resulting in a fast thermal response and compensating for the temperature drop during the discharge process, thereby stabilizing the viscosity of the spinning solution.

[0018] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 An overall perspective view provided for an embodiment of this disclosure; Figure 2 This is an overall front view structural diagram provided for an embodiment of the present disclosure; Figure 3 This is a cross-sectional view of the insulation mechanism provided in an embodiment of the present disclosure; Figure 4 This is a schematic cross-sectional view of the flow plate provided in an embodiment of this disclosure.

[0022] In the picture: 1. Pump body; 10. Liquid flow chamber; 11. Liquid inlet channel; 12. Liquid outlet channel; 2. Insulation mechanism; 21. Flow plate; 210. Spiral flow channel; 22. Reset assembly; 220. Limiting block; 221. Drive block; 222. Arc rod; 23. Baffle plate; 3. Drive mechanism; 30. Drive motor; 300. Rotating shaft; 31. Eccentric wheel; 32. Push rod; 33. Driven rod; 34. Diaphragm; 35. Fixing component; 36. Drive spring; 4. One-way flow mechanism; 40. Limiting platform; 41. Blocking ball; 42. Limiting component. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0026] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0027] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0028] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0029] Research has revealed that diaphragm metering pumps have certain technical limitations when pumping temperature-sensitive liquids such as spinning solutions. Specifically, during the pump's discharge phase, as the liquid flows out of the pump chamber through the discharge valve, a sudden drop in liquid pressure causes a "flash evaporation" effect. Additionally, the liquid exchanges heat with the relatively low-temperature pump body and piping components, resulting in a significant decrease in the temperature of the pumped liquid. When the pumped medium is a spinning solution, this temperature drop directly affects the liquid's rheological properties, potentially leading to increased viscosity and decreased fluidity. This, in turn, causes uneven flow and increased pressure fluctuations at the spinneret micro-orifices, severely impacting the stability of the spinning process and the uniformity of the final fiber quality.

[0030] Based on the above research, this disclosure provides a diaphragm metering pump, a heat preservation mechanism, and a working method. By providing a heat preservation mechanism, when the liquid flows through the flow plate, the flow plate is rotated, causing shear force to be generated in the flowing liquid. The heat generated by this shear force can directly act on the fluid core, resulting in a fast thermal response. This can compensate for the temperature drop during the discharge process, thereby stabilizing the viscosity of the spinning solution.

[0031] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] In some embodiments, such as Figures 1 to 2 As shown, before using this diaphragm metering pump, the operator should first connect the corresponding pipelines to the inlet channel 11 and the outlet channel 12, with the liquid flow direction as follows: Figure 1 As shown in the F1 direction, after the connection is completed, as follows: Figure 2 As shown, when the drive motor 30 is started, its output end drives the rotating shaft 300 to rotate, which in turn drives the eccentric wheel 31 sleeved on the outer wall of the rotating shaft 300 to rotate. When the eccentric wheel 31 rotates, it pushes the push rod 32 that abuts against its outer wall, which in turn pushes the push rod 32 and the driven rod 33 to move toward the diaphragm 34. When the driven rod 33 moves toward the diaphragm 34, the drive spring 36 is compressed, and the diaphragm 34 is forced to expand, squeezing the internal space of the liquid flow chamber 10. At this time, the sealing ball 41 located in the drain channel 12 is pushed upward by the pressure and moves away from the contact with the corresponding limiting platform 40. The drain channel 12 is opened to allow the liquid to drain. The function of the limiting member 42 is to restrict the sealing ball 41. The movement distance, at the same time, when the internal space of the liquid flow cavity 10 is squeezed, the blocking ball 41 located in the liquid inlet channel 11 is simultaneously pressed down. At this time, the blocking ball 41 continuously abuts against the corresponding limiting platform 40, blocking the liquid inlet channel 11. When the eccentric wheel 31 continues to rotate and no longer pushes the push rod 32, the drive spring 36 is reset and pulls the driven rod 33 to reset. That is, at this time, the driven rod 33 moves away from the diaphragm 34 and simultaneously pulls the diaphragm 34 to contract, so that the internal space of the liquid flow cavity 10 is restored, the blocking ball 41 in the liquid inlet channel 11 moves up to enter the liquid, and at the same time, the blocking ball 41 in the liquid outlet channel 12 moves down to block the liquid outlet channel 12. This process is repeated continuously to achieve the effect of liquid inlet and liquid outlet.

[0035] In some embodiments, such as Figures 3 to 4As shown in the above description, when the diaphragm 34 expands, it compresses the internal space of the liquid flow chamber 10, and the liquid is squeezed into the drain channel 12. When the liquid flows, it passes through the inclined channel 210 opened inside the flow plate 21. Since the upper end face of the flow plate 21 is provided with a baffle plate 23, and there is a certain gap between the baffle plate 23 and the flow plate 21, when the liquid enters the spiral flow channel 210 inside the flow plate 21, the pressure on the liquid is transmitted to the flow plate 21, causing the flow plate 21 to deflect. At the same time, when the flow plate 21 rotates, it drives the driving blocks 221 on both sides of its outer wall to rotate synchronously. Since the thickness of the flow plate 21 is relatively thin, that is, the flow channel length of the spiral flow channel 210 is relatively short, if the flow plate 21 is stationary, When the liquid flows through the short spiral channel 210, it is difficult to generate strong shear force. Therefore, by rotating the flow plate 21, a shear force is actively generated on the liquid that is flowing. The strong shear force generated on high-viscosity spinning liquid, for example, causes the local temperature of the liquid to rise, thereby achieving the heat preservation effect on the flowing liquid. When each drive block 221 moves toward the corresponding limit block 220, the return spring (not shown in the figure) sleeved on the outer wall of the corresponding arc rod 222 is compressed. At this time, the liquid flows out from the gap between the flow plate 21 and the baffle plate 23 and is discharged into the downstream equipment. According to the above description, when the diaphragm 34 contracts, the flow plate 21 is no longer under pressure. At this time, the return spring rebounds and pushes the corresponding drive block 221 to reset, that is, the flow plate 21 is reset at this time.

[0036] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0038] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature and another element or feature illustrated in the figures. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0039] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0040] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A diaphragm metering pump, characterized in that, include: The pump body (1) has a liquid flow chamber (10) on its outer wall. The top and bottom of the liquid flow chamber (10) are respectively provided with a drain channel (12) and a liquid inlet channel (11). The drive mechanism (3) is disposed inside the liquid flow chamber (10); in The diaphragm (34) in the drive mechanism (3) is adapted to draw liquid into the liquid flow chamber (10) through the liquid inlet channel (11) during contraction, and the diaphragm (34) is adapted to discharge liquid through the liquid outlet channel (12) during expansion; as well as The heat preservation mechanism (2) is installed on the inner wall of the drainage channel (12); in The flow plate (21) in the heat preservation mechanism (2) is adapted to rotate to generate shear force on the flowing liquid as the diaphragm (34) expands and pushes the liquid flow out of the drain channel (12).

2. The diaphragm metering pump as described in claim 1, characterized in that, The heat preservation mechanism (2) includes: A baffle plate (23) is connected to the inner wall of the drainage channel (12) via a short shaft, and a gap is provided between the lower end face of the baffle plate (23) and the upper end face of the flow plate (21). Inside the flow plate (21), a plurality of spiral channels (210) are circumferentially formed along the axial direction of the flow plate (21); and A pair of reset components (22) are arranged symmetrically on the outer wall of the flow plate (21); wherein When the diaphragm (34) expands and pushes the liquid flow out of the drain channel (12), the liquid passes through the spiral flow channel (210) and drives the flow plate (21) to rotate to generate shear force on the flowing liquid; When the diaphragm (34) contracts, each reset component (22) pushes the flow plate (21) to rotate and reset.

3. The diaphragm metering pump as described in claim 2, characterized in that, Each of the reset components (22) includes: A limiting block (220) is disposed on the inner wall of the drainage channel (12); A driving block (221) is disposed on the outer wall of the flow plate (21), and an arc-shaped rod (222) is provided on the end face of the driving block (221) facing the corresponding limiting block (22); and Each of the aforementioned arc-shaped rods (222) has a return spring fitted on its outer wall; wherein When the diaphragm (34) expands, the flow plate (21) rotates, causing the corresponding drive block (221) to rotate closer to the corresponding limit block (220) and compress the corresponding reset spring; and When the diaphragm (34) contracts, each reset spring rebounds and pushes the corresponding drive block (221) to reset.

4. The diaphragm metering pump as described in claim 1, characterized in that, The drive mechanism (3) includes: A drive motor (30) is mounted on the outer wall of the pump body (1), and the output end of the drive motor (30) is connected to a rotating shaft (300); wherein The rotating shaft (300) penetrates the outer wall of the pump body (1), and an eccentric wheel (31) is provided on the outer wall of one end of the rotating shaft (300) inside the pump body (1); and The push rod (32) is horizontally disposed inside the pump body (1) and slidably connected to the inner wall of the pump body (1); wherein The drive motor (30) is adapted to drive the rotating shaft (300) and the eccentric wheel (31) to rotate when started, and then push the push rod (32) to move toward the liquid flow chamber (10) through the eccentric wheel (31).

5. The diaphragm metering pump as described in claim 4, characterized in that, A diaphragm (34) is provided inside the liquid flow chamber (10). A driven rod (33) is horizontally arranged on the end face of the diaphragm (34) facing the push rod (32), and the driven rod (33) is connected to the push rod (32); A fixing member (35) is provided on the inner wall of the liquid flow chamber (10), and the driven rod (33) passes through the fixing member (35) and is slidably connected to the fixing member (35); wherein The push rod (32) is adapted to push the driven rod (33) to squeeze the diaphragm (34) as it moves toward the liquid flow chamber (10) so that the diaphragm (34) expands and thereby discharges the liquid from the drain channel (12).

6. The diaphragm metering pump as described in claim 5, characterized in that, A drive spring (36) is provided on the outer wall of the fixing member (35), and the two ends of the drive spring (36) are respectively connected to the fixing member (35) and the driven rod (33); wherein After the eccentric wheel (31) rotates and disengages from the push rod (32), the drive spring (36) resets and pulls the driven rod (33) and the push rod (32) to reset, thereby causing the diaphragm (34) to contract.

7. The diaphragm metering pump as described in claim 1, characterized in that, Both the drain channel (12) and the inlet channel (11) are equipped with a one-way flow mechanism (4), and each one-way flow mechanism (4) includes: A limiting platform (40), and a blocking ball (41) is provided on the upper end surface of the limiting platform (40); and A limiting element (42) is disposed above the blocking ball (41).

8. A heat preservation mechanism for a diaphragm metering pump as described in any one of claims 1-7, characterized in that, include: A flow plate (21) is disposed inside the drain channel (12); A baffle plate (23) is connected to the inner wall of the drain channel (12) via a short shaft, and a gap is provided between the lower end face of the baffle plate (23) and the upper end face of the flow plate (21). Inside the flow plate (21), a plurality of spiral channels (210) are circumferentially formed along the axial direction of the flow plate (21); and A pair of reset components (22) are arranged symmetrically on the outer wall of the flow plate (21); in When the diaphragm (34) expands and pushes the liquid flow out of the drain channel (12), the liquid passes through the spiral flow channel (210) and drives the flow plate (21) to rotate; When the diaphragm (34) contracts, each reset component (22) pushes the flow plate (21) to rotate and reset.

9. The heat preservation mechanism for a diaphragm metering pump as described in claim 8, characterized in that, Each of the reset components (22) includes: A limiting block (220) is installed on the inner wall of the drainage channel (12); A drive block (221) is disposed on the outer wall of the flow plate (21), and an arc-shaped rod (222) is provided on the end face of the drive block (221) facing the corresponding limiting block (22); and Each of the aforementioned arc-shaped rods (222) has a return spring fitted on its outer wall; wherein When the diaphragm (34) expands, the flow plate (21) rotates, causing the corresponding drive block (221) to rotate closer to the corresponding limit block (220) and compress the corresponding reset spring; and When the diaphragm (34) contracts, each reset spring rebounds and pushes the corresponding drive block (221) to reset.

10. A method of operating the diaphragm metering pump as described in any one of claims 1-7, characterized in that, The working method includes: By starting the drive motor (30), its output end drives the rotating shaft (300) and the eccentric wheel (31) to rotate. When the eccentric wheel (31) rotates to contact the push rod (32), it pushes the push rod (32) to move. By pushing the push rod (32) to move, the driven rod (33) is driven to move, thereby pushing the diaphragm (34) to expand and squeeze the space in the liquid flow chamber (10), and then the liquid is discharged through the drain channel (12); As the liquid flows through the spiral channel (210) inside the flow plate (21), it drives the flow plate (21) to rotate, thereby agitating the liquid to generate shear force.

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