Polymer spinning metering pump

Abstract

The utility model discloses a polymer spinning metering pump. The polymer spinning metering pump comprises a pump body, a driving shaft, a driven shaft, at least two driving gears and at least two driven gears, each driving gear is nested in the driving shaft, and each driven gear is nested in the driven shaft; each driving gear is meshed with the corresponding driven gear; the driving shaft can be connected with a driving mechanism and can rotate under the driving of the driving mechanism; at least two sub-cavities are formed in the pump body, and the driving gears and the driven gears are arranged in the sub-cavities; the pump body is provided with an inlet and an outlet, one end of each sub-cavity is connected with the inlet, and the other end of each sub-cavity is connected with the outlet. According to the polymer spinning metering pump, the quality of spinning products can be improved, the working efficiency, reliability and precision are improved, and the operation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of measuring instrument, and relates to a metering pump, especially a polymer spinning metering pump. BACKGROUND

[0002] In the field of high-performance polymer materials, thermoplastic polymers are widely used in various industrial fields such as aerospace, automobile manufacturing, and electronics due to their excellent mechanical properties and processability. In the field of thermoplastic polymer processing, spinning is an important processing method that can convert thermoplastic polymers into fibrous materials, widely used in textile, medical, and filtration fields. In the field of precision machinery manufacturing, a metering pump is an important device that can accurately control the flow and pressure of fluids to ensure high precision in the processing process. Mechanical spinning metering pumps are a common type of metering pump that uses mechanical structures to achieve accurate control of fluids.

[0003] Existing mechanical spinning metering pumps usually use ordinary metal materials such as aluminum alloy and stainless steel. Although these materials have good mechanical properties, they are prone to thermal expansion and wear in high-temperature environments, resulting in reduced performance and shortened service life of the pump. At the same time, the existing pump cavity design, gear transmission system, and sealing ring components also have certain problems, such as high roughness of the inner surface of the pump cavity, large gap between the gear outer circle and the gear plate inner circle, and insufficient sealing performance of the sealing ring, which will affect the metering accuracy, working efficiency, and service life of the pump.

[0004] Therefore, there is an urgent need to design a new spinning metering pump to overcome at least some of the above-mentioned deficiencies of existing spinning metering pumps. SUMMARY

[0005] The utility model provides a polymer spinning metering pump, which can improve the quality of spinning products, improve work efficiency, reliability, and precision, and reduce operating costs.

[0006] To solve the above technical problems, according to one aspect of the utility model, the following technical solutions are adopted:

[0007] A polymer spinning metering pump, comprising: a pump body, a driving shaft, a driven shaft, at least two driving gears, and at least two driven gears.

[0008] Each driving gear is nested in the driving shaft, and each driven gear is nested in the driven shaft. Each driving gear is engaged with the corresponding driven gear. The driving shaft can be connected to a driving mechanism and can rotate under the drive of the driving mechanism.

[0009] The pump body is provided with at least two sub-cavities, and each driving gear and each driven gear is arranged in the sub-cavity; the pump body is provided with an inlet and an outlet, one end of each sub-cavity is connected to the inlet, and the other end is connected to the outlet;

[0010] The polymer spinning metering pump further comprises a pump cover arranged on one side of the pump body; the pump cover is provided with a through hole, and the driving shaft is nested in the pump cover;

[0011] The contact part of the pump cover and the driving shaft is sequentially provided with a sealing ring, a spacing washer and a positioning washer; the pump body and the pump cover are connected through bolts; the sealing ring comprises at least one of a metal reinforced graphite sealing ring, a graphite sealing ring and a fluorine rubber sealing ring.

[0012] As an embodiment of the utility model, the pump body comprises a first side plate body, a second side plate body, at least one intermediate plate body and at least two gear plate bodies; one gear plate body is arranged between the first side plate body and the intermediate plate body, and one gear plate body is arranged between the second side plate body and the intermediate plate body; or / and, part of the gear plate bodies are arranged between two adjacent intermediate plate bodies; the gear plate bodies form the sub-cavities under the cooperation of the two side plate bodies.

[0013] As an embodiment of the utility model, the gap between the outer circle of the driving gear and the corresponding area of the inner circle of the gear plate body is less than or equal to 0.1mm; the gap between the outer circle of the driven gear and the corresponding area of the inner circle of the gear plate body is less than or equal to 0.1mm.

[0014] As an embodiment of the utility model, the first side plate body, the second side plate body and the at least one intermediate plate body are fixed through at least one screw;

[0015] The contact part of the first side plate body, the second side plate body, each intermediate plate body and gear plate body is provided with a stepped connecting component, so as to improve the connection sealing performance.

[0016] As an embodiment of the utility model, the pump body comprises a first side plate body, a second side plate body and at least one intermediate plate body; each intermediate plate body is arranged between the first side plate body and the second side plate body in a stacked manner;

[0017] The second side of the first side plate body is provided with a second groove, the first side of the second side plate body is provided with a first groove, and the two sides of the intermediate plate body are respectively provided with a first groove and a second groove;

[0018] The second groove and the first groove cooperate to form a sub-cavity, and the sub-cavity places corresponding driving gears and driven gears, and simultaneously, the sub-cavity serves as part of a conveying channel.

[0019] As an embodiment of the utility model, the first side plate body, the second side plate body and the at least one intermediate plate body are fixed by at least one screw.

[0020] As an embodiment of the utility model, the pump body, the pump cover, the driving shaft, the driven shaft, each driving gear and each driven gear adopt at least one of high-strength high-temperature-resistant molybdenum high-speed steel, high-carbon high-speed steel, high-vanadium system and cobalt high-speed steel.

[0021] As an embodiment of the utility model, each driving gear is connected with the driving shaft by a key, and each driven gear is connected with the driven shaft by a key.

[0022] As an embodiment of the utility model, the polymer spinning metering pump comprises two driving gears and two driven gears.

[0023] As an embodiment of the utility model, the pump body is provided with a front plate, an intermediate plate, a bottom plate, a first gear plate body and a second gear plate body; the first gear plate body is arranged between the front plate and the intermediate plate, and the first gear plate forms a first sub-cavity in cooperation with the front plate and the intermediate plate;

[0024] The second gear plate body is arranged between the intermediate plate and the bottom plate, and the second gear plate body forms a second sub-cavity in cooperation with the intermediate plate and the bottom plate; and the front plate, the intermediate plate and the bottom plate are fixed by a pin.

[0025] The polymer spinning metering pump provided by the utility model can improve the quality of spinning products, improve work efficiency, reliability and precision, and reduce operating costs.

[0026] In one use scenario of the utility model, the spinning metering pump is specially designed for processing high-temperature and good-flowing thermoplastic polymers, and the working temperature is as high as 300 DEG C, far exceeding the normal working temperature range of the prior art. By using high-temperature-resistant materials and precise manufacturing processes, the utility model effectively solves the problems of thermal expansion and wear of mechanical parts at high temperatures in the prior art, thereby maintaining the stable working performance of the pump and ensuring the accurate control of the flow and pressure of the polymer.

[0027] In view of the problems of reduced viscosity and increased flowability of materials at high temperatures, the metering pump of the utility model adopts special gear design and gap control technology, so that the gap between the outer circle of the gear and the inner circle of the gear plate is less than or equal to 0.1 mm, which greatly improves the volumetric efficiency of the pump to more than 90%, while reducing the flow accuracy to within ±1%. This significantly improves the quality of spinning products and meets the production needs of high-precision requirements.

[0028] The metering pump of this invention fully considers the characteristics of fluid dynamics and pump efficiency during its design process. By optimizing the pump's structure and materials, energy and resource waste are reduced. Compared with existing technologies, this invention not only improves work efficiency but also reduces operating costs, resulting in higher economic benefits.

[0029] The metering pump of this invention can be used not only for melt spinning but also for solution spinning, greatly enhancing its versatility, adapting to more production scenarios, and improving the flexibility and efficiency of the production line.

[0030] This utility model's metering pump employs a high-temperature annealing process, causing phase transformation in the pump's gears and other key components at high temperatures. This improves the pump's high-temperature resistance and oxidation resistance, further extending its service life. In summary, compared to existing technologies, this utility model offers advantages such as better high-temperature stability, high-precision metering, optimized fluid dynamics design, wide applicability, and a superior high-temperature annealing process. It is a highly efficient, reliable, and economical spinning metering pump with broad application prospects. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the polymer spinning metering pump in one embodiment of the present invention.

[0032] Figure 2 This is a schematic diagram of the polymer spinning metering pump in one embodiment of the present invention. Detailed Implementation

[0033] The preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0034] To further understand this utility model, preferred embodiments of this utility model are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the scope of the claims of this utility model.

[0035] The description in this section pertains to only a few typical embodiments, and this utility model is not limited to the scope of the embodiments described. Substitution of identical or similar prior art methods with some technical features in the embodiments is also within the scope of this utility model's description and protection.

[0036] The term "connection" in this specification includes both direct and indirect connections. Furthermore, for ease of explanation, different names in the specific implementation use the same notation.

[0037] This utility model discloses a polymer spinning metering pump. Figure 1 , Figure 2 This is a schematic diagram of the polymer spinning metering pump in one embodiment of the present invention; please refer to [link / reference].Figure 1 、 Figure 2 , the polymer spinning metering pump comprises: a pump body 1, a driving shaft 2, a driven shaft 3, at least two driving gears 4, at least two driven gears 5.

[0038] Each driving gear 4 is nested in the driving shaft 2, and each driven gear 5 is nested in the driven shaft 3; each driving gear 4 is engaged with the corresponding driven gear 5; the driving shaft 2 can be connected with a driving mechanism and can rotate under the driving of the driving mechanism. In an embodiment, each driving gear 4 is connected with the driving shaft 2 through a key 14.

[0039] At least two sub-cavities 6 are arranged in the pump body 1, and each driving gear 4 and each driven gear 5 are arranged in the sub-cavity 6; the pump body 1 is provided with an inlet and an outlet, one end of each sub-cavity 6 is connected with the inlet, and the other end is connected with the outlet.

[0040] In an embodiment of the utility model, the polymer spinning metering pump further comprises a pump cover 7, the pump cover 7 is arranged at one side of pump body 1, the pump cover 7 is provided with through hole, the driving shaft 2 can be nested in the pump cover 7. The pump cover 7 can be fixed on the pump body 1 through bolt 17.

[0041] Sealing ring 8, spacer washer 9 and positioning washer 10 are sequentially arranged at the contact position of the pump cover 7 and the driving shaft 2; the sealing ring comprises at least one of metal reinforced graphite sealing ring, graphite sealing ring and fluorine rubber sealing ring. In an embodiment, the sealing ring 8 is made of one or more of metal reinforced graphite, graphite and fluorine rubber. The positioning washer 10 is a stainless steel washer, and can also be a washer made of other materials. The spacer washer 9 can be a stainless steel washer, and can also be a washer made of other materials. The utility model solves the problem of sealing under high temperature and high pressure; the contact position of the pump cover and the driving shaft is sequentially provided with a sealing ring, a spacer washer and a positioning washer; the sealing ring is made of graphite material with metal support net reinforcement, thereby ensuring the comprehensive performance of pressure resistance, high temperature resistance and sealing performance; the graphite sealing ring is separated by the spacer ring, thereby ensuring better sealing effect and the advantage of long-term use.

[0042] The pump body 1, the pump cover 7, the driving shaft 2, the driven shaft 3, each driving gear 4 and each driven gear 5 can adopt at least one of high-strength high-temperature-resistant molybdenum high-speed steel, high-carbon high-speed steel, high-vanadium system and cobalt high-speed steel.

[0043] In an embodiment of the utility model, the pump body 1 includes first side plate body 11, second side plate body 12 and at least one intermediate plate body 13, and each intermediate plate body 13 is arranged between the first side plate body 11 and the second side plate body 12. The second side of the first side plate body 11 is provided with a second groove, the first side of the second side plate body 12 is provided with a first groove, and the two sides of the intermediate plate body 13 are respectively provided with a first groove and a second groove. The second groove and the first groove can form a sub-cavity 6, and the sub-cavity is arranged to correspond to the driving gear 4 and the driven gear 5, and the sub-cavity 6 is part of a conveying channel. The first side plate body 11, the second side plate body 12 and the at least one intermediate plate body 13 are fixed by at least one screw, are convenient to disassemble, and the number of intermediate plate bodies 13 can be selected as required.

[0044] In an embodiment of the utility model, the pump body 1 includes first side plate body 11, second side plate body 12 and at least one intermediate plate body 13, and each intermediate plate body 13 is arranged between the first side plate body 11 and the second side plate body 12.

[0045] The second side of the first side plate body 11 is provided with a second groove, the first side of the second side plate body 12 is provided with a first groove, and the two sides of the intermediate plate body 13 are respectively provided with a first groove and a second groove. The second groove and the first groove can form a sub-cavity 6, and the sub-cavity is arranged to correspond to the driving gear 4 and the driven gear 5, and the sub-cavity 6 is part of a conveying channel. The first side plate body 11, the second side plate body 12 and the at least one intermediate plate body 13 are fixed by at least one screw, are convenient to disassemble, and the number of intermediate plate bodies 13 can be selected as required.

[0046] In an embodiment of the utility model, the pump body 1 includes first side plate body 11, second side plate body 12 and at least one intermediate plate body 13, and each intermediate plate body 13 is arranged between the first side plate body 11 and the second side plate body 12. The second side of the first side plate body 11 is provided with a second groove, the first side of the second side plate body 12 is provided with a first groove, and the two sides of the intermediate plate body 13 are respectively provided with a first groove and a second groove. The second groove and the first groove can form a sub-cavity 6, and the sub-cavity is arranged to correspond to the driving gear 4 and the driven gear 5, and the sub-cavity 6 is part of a conveying channel. The first side plate body 11, the second side plate body 12 and the at least one intermediate plate body 13 are fixed by at least one screw, are convenient to disassemble, and the number of intermediate plate bodies 13 can be selected as required.

[0047] As Figure 1As shown, in an embodiment, the polymer spinning metering pump includes two driving gears 4 and two driven gears 5. The pump body 1 is provided with a front plate 11, an intermediate plate 13, a bottom plate 12, a first gear plate body 18, and a second gear plate body 19. The first gear plate body 18 is arranged between the front plate 11 and the intermediate plate 13, and the first gear plate 18 forms a first sub-cavity in cooperation with the front plate and the intermediate plate. The second gear plate body 19 is arranged between the intermediate plate 13 and the bottom plate 12, and the second gear plate body 19 forms a second sub-cavity in cooperation with the intermediate plate and the bottom plate. The front plate 11, the intermediate plate 13, and the bottom plate 12 are fixed by pins 15.

[0048] In one use scenario of the present utility model, the present utility model can solve the problem of high temperature stability in the prior art: the existing mechanical spinning metering pump has performance degradation and shortened service life due to thermal expansion and wear problems in a high temperature environment. The present utility model solves this problem by using high-temperature-resistant materials and precise manufacturing processes, maintains the stable working performance of the pump, and ensures the accurate control of the flow and pressure of the polymer.

[0049] The present utility model can solve the problem of low measurement accuracy in the prior art: the existing pump cavity design, gear transmission system, and sealing ring components have certain problems, which will affect the measurement accuracy of the pump. The present utility model optimizes the structure and material of the pump, reduces energy waste and resource waste, improves the volumetric efficiency of the pump to more than 90%, reduces the flow accuracy to within ±1%, significantly improves the quality of the spinning product, and meets the production demand of high-precision requirements.

[0050] The present utility model can solve the problem of low working efficiency in the prior art: the existing mechanical spinning metering pump has low working efficiency and high operating cost due to structural design and material selection. The present utility model optimizes the fluid dynamics design, reduces energy waste and resource waste, improves working efficiency, reduces operating cost, and has higher economic benefits.

[0051] The present utility model can solve the problem of narrow application scenario in the prior art: the application scenario of the existing mechanical spinning metering pump is relatively limited and can only be used for melt spinning, which cannot meet the demand of solution spinning. The design of the present utility model is universal and can be used not only for melt spinning but also for solution spinning, which adapts to more production scenarios and improves the flexibility and efficiency of the production line.

[0052] In summary, the polymer spinning metering pump proposed by the present utility model can improve the quality of the spinning product, improve working efficiency, reliability, and accuracy, and reduce operating cost.

[0053] In one of the use scenarios of the present application, the spinning metering pump is specially designed for handling high-temperature, good-flowing thermoplastic polymers, with a working temperature as high as 300 DEG C, far exceeding the usual working temperature range of the prior art. By using high-temperature-resistant materials and precise manufacturing processes, the present application effectively solves the problems of thermal expansion and wear of mechanical parts at high temperatures in the prior art, thereby maintaining the stable working performance of the pump and ensuring the accurate control of the flow and pressure of the polymer. At least one of high-strength high-temperature-resistant molybdenum-based high-speed steel, high-carbon high-speed steel, high-vanadium system and cobalt high-speed steel is used.

[0054] In view of the problems of reduced viscosity and increased flowability of materials at high temperatures, the metering pump of the present application adopts gear design and gap control technology, so that the gap between the gear outer circle and the gear plate inner circle is less than or equal to 0.1mm, greatly improving the volumetric efficiency of the pump to more than 90%, while reducing the flow accuracy to within ±1%. This significantly improves the quality of the spinning product and meets the production needs of high-precision requirements.

[0055] In the design process of the metering pump of the present application, the characteristics of fluid dynamics and the working efficiency of the pump are fully considered, and by optimizing the structure and material of the pump, energy waste and resource waste are reduced. Compared with the prior art, the present application not only improves the working efficiency, but also reduces the operating cost, and has higher economic benefits.

[0056] The metering pump of the present application can not only be used for melt spinning, but also for solution spinning, and its versatility is greatly enhanced, adapting to more production scenarios and improving the flexibility and efficiency of the production line.

[0057] The metering pump of the present application adopts a high-temperature annealing process, so that the gears and other key components of the pump undergo phase change at high temperature, thereby improving the high-temperature resistance and oxidation resistance of the pump and further prolonging the service life of the pump. In summary, the present application has better high-temperature stability, high-precision metering, optimized fluid dynamics design, wide applicability and high-temperature annealing process, etc. compared with the prior art, and is a high-efficiency, reliable and economical spinning metering pump with broad application prospects.

[0058] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present application.

[0059] The description and application of the present application are illustrative, and are not intended to limit the scope of the present application to the above-mentioned embodiments. The effects or advantages involved in the embodiments can not be embodied in the embodiments due to various factors, and the description of the effects or advantages is not used to limit the embodiments. Variations and changes of the disclosed embodiments are possible, and various components of the embodiments are known to those skilled in the art. It should be clear to those skilled in the art that the present application can be realized in other forms, structures, arrangements, proportions, and with other components, materials and parts without departing from the spirit or essential characteristics of the present application. Other variations and changes of the disclosed embodiments can be made without departing from the scope and spirit of the present application.

Claims

1. A polymer spin metering pump characterized by, The polymer spinning metering pump comprises a pump body, a driving shaft, a driven shaft, at least two driving gears, and at least two driven gears. Each driving gear is nested in the driving shaft, and each driven gear is nested in the driven shaft; each driving gear is engaged with a corresponding driven gear; the driving shaft is connected to a driving mechanism and can rotate under the driving of the driving mechanism. The pump body is provided with at least two sub-cavities, each driving gear and each driven gear is arranged in the sub-cavity; the pump body is provided with an inlet and an outlet, one end of each sub-cavity is connected to the inlet, and the other end is connected to the outlet. The polymer spinning metering pump further comprises a pump cover arranged on one side of the pump body; the pump cover is provided with a through hole, and the driving shaft is nested in the pump cover. A sealing ring, a spacing washer, and a positioning washer are sequentially arranged at the contact position of the pump cover and the driving shaft; the pump body and the pump cover are connected by bolts; the sealing ring comprises at least one of a metal-reinforced graphite sealing ring, a graphite sealing ring, and a fluororubber sealing ring.

2. The polymer spinning metering pump according to claim 1, wherein: The pump body comprises a first side plate body, a second side plate body, at least one intermediate plate body, and at least two gear plate bodies; one gear plate body is arranged between the first side plate body and the intermediate plate body, and one gear plate body is arranged between the second side plate body and the intermediate plate body; or / and, part of the gear plate bodies are arranged between two adjacent intermediate plate bodies; each gear plate body forms the sub-cavity under the cooperation of the two side plate bodies.

3. The polymer spinning metering pump according to claim 2, wherein: The gap between the outer circle of the driving gear and the corresponding area of the inner circle of the gear plate body is less than or equal to 0.1 mm; and the gap between the outer circle of the driven gear and the corresponding area of the inner circle of the gear plate body is less than or equal to 0.1 mm.

4. The polymer spinning metering pump according to claim 2, wherein: The first side plate body, the second side plate body, and the at least one intermediate plate body are fixed by at least one screw; The contact positions of the first side plate body, the second side plate body, each intermediate plate body, and each gear plate body are provided with stepped connecting components to improve the connection sealing performance.

5. The polymer spinning metering pump according to claim 1, wherein: The pump body comprises a first side plate body, a second side plate body, and at least one intermediate plate body; each intermediate plate body is arranged between the first side plate body and the second side plate body in a stacked manner; The second side of the first side plate body is provided with a second groove, the first side of the second side plate body is provided with a first groove, and the two sides of the intermediate plate body are respectively provided with a first groove and a second groove; The second groove and the first groove cooperate to form a sub-cavity, the sub-cavity accommodates the corresponding driving gear and driven gear, and the sub-cavity serves as part of the conveying channel.

6. The polymer spinning metering pump according to claim 4, wherein: The first side plate body, the second side plate body, and the at least one intermediate plate body are fixed by at least one screw.

7. The polymer spinning metering pump according to claim 1, wherein: The pump body, the pump cover, the driving shaft, the driven shaft, each driving gear and each driven gear adopt at least one of high-strength high-temperature-resistant molybdenum high-speed steel, high-carbon high-speed steel, high-vanadium system and cobalt high-speed steel.

8. The polymer spin dosing pump of claim 1, wherein: Each driving gear is connected with the driving shaft through a key, and each driven gear is connected with the driven shaft through a key.

9. The polymer spin dosing pump of claim 1, wherein: The polymer spin dosing pump comprises two driving gears and two driven gears.

10. The polymer spin dosing pump of claim 9, wherein: The pump body is provided with a front plate, an intermediate plate, a bottom plate, a first gear plate body and a second gear plate body; the first gear plate body is arranged between the front plate and the intermediate plate, and the first gear plate forms a first sub-cavity under cooperation of the front plate and the intermediate plate; The second gear plate body is arranged between the intermediate plate and the bottom plate, and the second gear plate body forms a second sub-cavity under cooperation of the intermediate plate and the bottom plate; and the front plate, the intermediate plate and the bottom plate are fixed through a pin.

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