Precise metering device for double-sided spinning machine

Abstract

The invention provides a precise metering device for a double-sided spinning machine, and relates to the technical field of liquid material metering devices. The precise metering device for the double-sided spinning machine comprises a pump shell, an in-pump assembly, a laser distance sensing composite module and an air inlet cooling dust removal assembly. The liquid preparation pump cover is installed at the bottom of the cylinder body, the plungers are matched with the cylinder body, and the ejector blocks are installed on the tops of the plungers. The transmission shaft rotationally penetrates through the top wall of the pump shell and is connected with the cylinder body to drive the cylinder body to rotate, a tray fixed outside the transmission shaft is arranged in the mounting cavity, and a through opening vertically corresponding to the ejector block is formed in the tray. And the plurality of laser distance sensing composite modules are correspondingly arranged on the tray above the through opening. The swash plate type plunger pump is adopted as a main body structure to be matched with the multiple sets of laser distance sensing composite modules for stroke measurement, even if one stroke of the plunger is not finished, the moving range of the plunger can be accurately measured, and therefore metering data can be accurately obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid metering devices, in particular to a precise metering device for a double-sided spinning machine. BACKGROUND

[0002] A double-sided spinning machine uses a wet spinning process to produce filaments. The polypropylene stock solution used in the spinning process needs to be accurately dosed by a metering pump to achieve accurate spinning. The commonly used metering device can use a single plunger pump or a double plunger pump as the main body, and real-time monitoring of the pressure by a high-temperature melt valve and a pressure sensor is used to ensure the stability of the output. Compared with a double plunger pump, a swash plate plunger pump has more plungers, which also makes the swash plate plunger pump have very small flow and pressure pulsation when outputting polypropylene stock solution, and the output is stable. The commonly used liquid metering method is to dose according to the stroke and reciprocating frequency of the plunger. When the stroke of the plunger is not full of a metering unit, it will also cause a certain error in the stock solution metering, affecting the spinning production accuracy. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a precise metering device for a double-sided spinning machine to solve the problems of large pulsation of the double plunger pump in the conventional metering device, unstable output, and single stroke of the plunger not full affecting the metering accuracy.

[0004] According to the precise metering device for a double-sided spinning machine according to an embodiment of the present application, it comprises a pump housing, a pump internal assembly, a laser distance sensing composite module, and an air inlet cooling and dust removal assembly.

[0005] The pump internal assembly comprises a cylinder body, a liquid dispensing pump cover, plungers, a top block, and a transmission shaft. The liquid dispensing pump cover is installed at the bottom of the cylinder body. A plurality of plungers are arranged in cooperation with the cylinder body. The top block is installed at the top of the plunger. A plurality of plungers are externally provided with swash plates. The pump housing cover is combined with the liquid dispensing pump cover externally of the cylinder body. The transmission shaft is rotatably penetrated through the top wall of the pump housing and connected with the cylinder body to drive the cylinder body to rotate. An installation cavity is left between the swash plate and the internal top wall of the pump housing, and a tray fixed to the outside of the transmission shaft is arranged in the installation cavity. A through opening corresponding to the top block is arranged on the tray. A plurality of laser distance sensing composite modules are correspondingly installed on the tray above the through opening. The air inlet cooling and dust removal assembly comprises an air inlet pipe and a solenoid valve. One end of the air inlet pipe is in communication with the installation cavity in the pump housing. The solenoid valve is installed in cooperation with the air inlet pipe. An air outlet is arranged at the position opposite to the air inlet cooling and dust removal assembly on the side wall of the pump housing.

[0006] The precision metering device for the double-sided spinning machine also includes an exhaust dust filter assembly, which includes a fan and a dust collection shell. One end of the dust collection shell is connected to the exhaust port on the side wall of the tray, and the fan is installed inside the dust collection shell.

[0007] Preferably, the dust collection housing includes a rear housing, a front housing, and a filter screen. One end of the rear housing is fixedly installed to the pump housing and communicates with the exhaust port. The front housing and the rear housing are detachably installed. The filter screen is installed at the end of the front housing away from the rear housing. The fan is installed inside the rear housing.

[0008] Preferably, the exhaust dust filter assembly further includes a grid, which is disposed at the end of the fan near the filter.

[0009] Preferably, the inner wall of the rear section shell is provided with an internal thread, and the outer wall of the front section shell near the rear section shell is provided with a matching external thread.

[0010] Preferably, the dust collection shell further includes anti-slip protrusions, and a plurality of the anti-slip protrusions are arranged in a ring array on the outer surface of the front shell.

[0011] Preferably, a bearing that mates with the drive shaft is installed on the top of the pump housing.

[0012] Preferably, the tray has an installation port in the middle, the drive shaft passes through the installation port and is fixedly connected to the tray, and a gap is left between the outer edge of the tray and the inner wall of the pump casing.

[0013] Preferably, the pump internal assembly further includes a limiting plate, which is fixed inside the pump casing and rotates in cooperation with the swashplate, and a guide ring is provided on the top of the limiting plate.

[0014] Preferably, the swashplate has a clearance opening in the middle that mates with the drive shaft.

[0015] The precision metering device for the double-sided spinning machine also includes a flow guide ring shell, which includes an inner shell and an outer ring plate. The inner shell is fixed to the outside of the pump housing, and the outer ring plate is fixedly arranged on the outer ring of the inner shell. The top and bottom of the outer edges of the inner shell and the outer ring plate are provided with matching ear plates. The bottom end of the air inlet pipe is connected to the inside of the inner shell, and a connecting ventilation hole is provided between the pump housing and the inner shell.

[0016] The precision metering device for the double-sided spinning machine also includes a pneumatic dust removal component. The pneumatic dust removal component includes an air pump, an air guide pipe, an upper branch pipe, a lower branch pipe, a flow guide sleeve, and a dispersion flow guide part. The air pump is installed inside the inner casing. The air guide pipe passes through the ventilation hole and is connected to the air pump outlet port at one end. One end of the upper branch pipe and the lower branch pipe are both connected to the other end of the air guide pipe. The two sets of flow guide sleeves are respectively connected to the air outlet ports of the upper branch pipe and the lower branch pipe, and the dispersion flow guide part is located inside the flow guide sleeve.

[0017] Preferably, the dispersing guide section includes a shaft, a guide vane, and a counterweight. The shaft is rotatably disposed inside the guide sleeve, and the guide vane and the counterweight are respectively fixedly disposed on opposite sides of the shaft.

[0018] The precision metering device for the double-sided spinning machine also includes a flow guiding component, which includes a fixed sleeve and fan blades. The fixed sleeve is fixed outside the drive shaft and is located above the laser distance sensing composite module. Multiple sets of fan blades are arranged outside the fixed sleeve.

[0019] The precision metering device for the double-sided spinning machine also includes an inner wall cleaning assembly. The two sets of inner wall cleaning assemblies are arranged in a ring array on the sides of the two fan blades. The inner wall cleaning assembly includes an upper support strip, a lower support part and a cleaning strip. The upper support strip is fixedly connected to the end of the fan blade. The fan blade is located below the upper support strip. The cleaning strip connects the upper support strip and the lower support part and is located outside the upper support strip and the lower support part.

[0020] Preferably, the lower support includes side strip I, side strip II, connecting block and limiting support bar. The two connecting blocks are connected to the side strip I and side strip II on the side near the fan blade. The limiting support bar is fixed to the upper connecting block on the side near the fan blade and limits contact with the upper support bar. The side strip I is set higher than the side strip II.

[0021] The beneficial effects of this application are as follows: The precision metering device for a double-sided spinning machine obtained through the above design uses a swashplate plunger pump as the main structure, combined with multiple sets of laser distance sensing composite modules for stroke measurement. Even if the plunger's stroke is not completed, the range of plunger movement can be accurately measured, thereby obtaining accurate metering data. Compared with the traditional metering method using a dual-plunger pump, this precision metering device for a double-sided spinning machine has a smaller single flow rate and smaller pulse when pumping out the raw liquid, resulting in a more stable delivery of polypropylene raw liquid.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a precision metering device for a double-sided spinning machine according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the tray and laser distance sensing composite module according to an embodiment of this application; Figure 3 This is a schematic diagram of the exploded structure of the exhaust dust filter assembly according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a precision metering device for a double-sided spinning machine according to another embodiment of this application; Figure 5 This is a schematic diagram of the cross-section of the flow guide ring shell, the air intake cooling and dust removal component, and the air pressure dust removal component according to another embodiment of this application. Figure 6 This is a schematic diagram of the structure of a pneumatic dust removal component according to another embodiment of this application; Figure 7 This is a schematic diagram of the structure of the dispersion guide section according to another embodiment of this application; Figure 8 This is a schematic diagram of the drainage component and inner wall cleaning component according to another embodiment of this application; Figure 9 This is a schematic diagram of the internal wall cleaning component structure according to another embodiment of this application; Figure 10 This is a schematic diagram of the lower support structure according to another embodiment of this application.

[0025] Figure label: 1. Pump housing; 11. Tray; 12. Port; 13. Bearing; 14. Mounting port; 2. Internal pump components; 21. Cylinder body; 22. Dispensing pump cover; 23. Plunger; 24. Swashplate; 25. Top block; 26. Limiting plate; 27. Drive shaft; 28. Guide ring; 29. ​​Clearance opening; 3. Laser distance sensing composite module; 4. Intake cooling and dust removal assembly; 41. Intake pipe; 42. Solenoid valve; 5. Exhaust dust filter assembly; 51. Fan; 52. Dust collection housing; 521. Rear housing; 522. Front housing; 523. Filter screen; 524. Anti-slip ridge; 53. 6. Grid; 7. Guide ring shell; 8. Inner sleeve shell; 9. Outer ring plate; 10. Ear plate; 11. Pneumatic dust removal assembly; 12. Air pump; 13. Air guide pipe; 14. Upper branch pipe; 15. Lower branch pipe; 16. Guide sleeve; 17. Dispersing guide part; 18. Shaft; 19. Guide vane; 10. Counterweight block; 10. Drainage assembly; 11. Fixing sleeve; 12. Fan blade; 13. Inner wall cleaning assembly; 14. Upper support bar; 15. Lower support part; 16. Side bar I; 17. Side bar II; 18. Connecting block; 19. Limiting support bar; 10. Cleaning bar. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0029] A precision metering device for a double-sided spinning machine according to an embodiment of this application is described below with reference to the accompanying drawings.

[0030] Please see Figures 1-3 According to an embodiment of this application, a precision metering device for a double-sided spinning machine includes: a pump housing 1, an internal pump assembly 2, a laser distance sensing composite module 3, and an air intake cooling and dust removal assembly 4.

[0031] The pump internal assembly 2 includes a cylinder body 21, a dispensing pump cover 22, plungers 23, a top block 25, and a drive shaft 27. The dispensing pump cover 22 is installed at the bottom of the cylinder body 21, multiple plungers 23 are fitted into the cylinder body 21, and the top block 25 is installed on the top of the plungers 23. A swashplate 24 is provided on the outside of the multiple plungers 23. The pump housing 1 covers the outside of the cylinder body 21 and connects to the dispensing pump cover 22. The drive shaft 27 rotates through the top wall of the pump housing 1 and connects to the cylinder body 21, driving the cylinder body 21 to rotate. An installation cavity is provided between the swashplate 24 and the inner top wall of the pump housing 1, and a tray 11 fixed to the outside of the drive shaft 27 is provided inside the installation cavity. The tray 11 has a through-hole 12 perpendicular to the top block 25. Multiple laser distance sensing composite modules 3 are correspondingly installed on the tray 11 above the through-hole 12. The air intake cooling and dust removal assembly 4 includes an air intake pipe 41 and a solenoid valve 42. One end of the air intake pipe 41 is connected to the mounting cavity inside the pump housing 1. The solenoid valve 42 is installed in conjunction with the air intake pipe 41. An exhaust port is provided on the side wall of the pump housing 1 opposite to the air intake cooling and dust removal assembly 4.

[0032] The design of the precision metering device for this double-sided spinning machine adopts a swashplate plunger pump as the main structure. Compared with the traditional dual-plunger pump, it has smaller flow and pressure pulsations when conveying polypropylene raw material for spinning, resulting in more stable liquid output. Multiple plungers 23 inside the cylinder 21 of the pump housing 1 are equipped with highly reflective top blocks 25. The top of the top block 25 can be a high-precision polished surface to facilitate the reflection of the laser emitted by the laser distance sensing composite module 3. Each laser distance sensing composite module 3 corresponds to one top block 25. When the drive shaft 27 drives the cylinder 21, plungers 23, and top blocks 25 to rotate, the laser distance sensing composite module 3 on the tray 11 will also rotate synchronously, ensuring that the corresponding laser distance sensing composite module 3 is always positioned vertically above its corresponding top block 25. By capturing the reflection of the laser emitted by the laser distance sensing composite module 3, the vertical movement distance of each plunger 23 is monitored in real time. Based on the change in the vertical displacement of each plunger 23, and in conjunction with the calculation module system (not shown), the amount of polypropylene raw material used can be more accurately measured.

[0033] Compared to conventional dual-plunger pumps that measure flow rate by the plunger's stroke, this precision metering device for double-sided spinning machines uses a swashplate plunger pump as its main structure, combined with multiple laser distance sensing composite modules 3 for stroke measurement. Even if the plunger 23 has not completed one stroke, the device can accurately measure the plunger's movement range, thus obtaining precise metering data. Compared to traditional metering methods using dual-plunger pumps, this precision metering device for double-sided spinning machines has a smaller single flow rate and smaller pulse when pumping out the raw material, resulting in a more stable delivery of the polypropylene raw material.

[0034] The laser distance sensing composite module 3 is susceptible to dust interference. By injecting gas into the mounting cavity inside the pump housing 1 through the air intake pipe 41 in the air intake cooling and dust removal component 4, the dust inside the mounting cavity of the pump housing 1 is cleaned and discharged from the exhaust port on the side of the pump housing 1, ensuring that the internal space of the pump housing 1 is kept clean. This reduces the interference from dust during the path of light generation and reflection of the laser distance sensing composite module 3.

[0035] The precision metering device for the double-sided spinning machine also includes an exhaust dust filter assembly 5, which includes a fan 51 and a dust collection housing 52. One end of the dust collection housing 52 is connected to the exhaust port on the side wall of the tray 11, and the fan 51 is installed inside the dust collection housing 52. The dust collection housing 52 includes a rear housing 521, a front housing 522, and a filter screen 523. One end of the rear housing 521 is fixed to the pump housing 1 and connected to the exhaust port. The front housing 522 is detachably connected to the rear housing 521. The filter screen 523 is located at the end of the front housing 522 away from the rear housing 521, and the fan 51 is installed inside the rear housing 521. The fan 51 increases the flow rate of the gas inside the pump housing 1, transporting the dust in the gas to the front housing 522, where the dust is filtered out by the filter screen 523. The front housing 522 can be opened to remove and clean the dust remaining inside.

[0036] Specifically, the exhaust dust filter assembly 5 also includes a grid 53, which is disposed at the end of the fan 51 near the filter screen 523. The grid 53 serves to prevent backflow and block dust. The inner wall of the rear housing 521 is provided with internal threads, and the outer wall of the front housing 522 near the rear housing 521 is provided with matching external threads. The dust collection housing 52 also includes anti-slip ridges 524, which are arranged in a ring array on the outer surface of the front housing 522. The anti-slip ridges 524 make it easier to rotate the front housing 522.

[0037] Furthermore, a bearing 13 that mates with the drive shaft 27 is installed on the top of the pump casing 1. A mounting port 14 is provided in the middle of the tray 11, through which the drive shaft 27 passes and is fixedly connected to the tray 11. A gap is left between the outer edge of the tray 11 and the inner wall of the pump casing 1. The pump internal assembly 2 also includes a limiting plate 26, which is fixed inside the pump casing 1 and rotatably engages with the swashplate 24. A guide ring 28 is provided on the top of the limiting plate 26. A clearance opening 29 is provided in the middle of the swashplate 24 to mate with the drive shaft 27.

[0038] The aforementioned precision metering device for double-sided spinning machine blows gas into the pump housing 1 through the air inlet pipe 41. It is difficult to clean the dust attached to the receiving end of the laser distance sensing composite module 3 and the top surface of the top block 25. The dust attached to the bottom of the laser distance sensing composite module 3 and the top surface of the top block 25 will affect the reception and reflection of light, thereby affecting the detection accuracy.

[0039] Please see Figures 4-7 This application provides another embodiment where the precision metering device for the double-sided spinning machine further includes a guide ring shell 6, which includes an inner shell 61 and an outer ring plate 62. The inner shell 61 is fixed to the outside of the pump housing 1, and the outer ring plate 62 is fixedly disposed on the outer ring of the inner shell 61. The top and bottom edges of the inner shell 61 and the outer ring plate 62 are each provided with matching ear plates 63. The bottom end of the air inlet pipe 41 is connected to the interior of the inner shell 61, and a connecting ventilation hole is provided between the pump housing 1 and the inner shell 61. The precision metering device for the double-sided spinning machine also includes a pneumatic dust removal assembly 7, which includes an air pump 71, an air guide pipe 72, an upper branch pipe 73, a lower branch pipe 74, a guide sleeve 75, and a dispersion guide section 76. An air pump 71 is installed inside the inner housing 61. An air guide pipe 72 passes through a ventilation hole and is connected at one end to the air outlet of the air pump 71. One end of the upper branch pipe 73 and the lower branch pipe 74 are both connected to the other end of the air guide pipe 72. Two sets of flow guide sleeves 75 are respectively connected to the air outlets of the upper branch pipe 73 and the lower branch pipe 74, and a dispersion guide part 76 is located inside the flow guide sleeve 75. The flow guide sleeve 75 at the end of the upper branch pipe 73 is positioned towards the opening 12 below the tray 11, and the flow guide sleeve 75 at the end of the lower branch pipe 74 is inclined towards the top block 25. The flow guide sleeves 75 should be positioned to avoid the emission and reflection lines of the laser distance sensing composite module 3, and to prevent obstruction of the laser path.

[0040] In this embodiment, nitrogen can be used as the gas introduced. Nitrogen is an inert gas, non-toxic, non-flammable, and non-explosive, making it safer to use. Nitrogen is introduced into the inner shell 61 through the air inlet pipe 41. The air pump 71 in the pneumatic dust removal assembly 7 draws nitrogen from inside the inner shell 61, pressurizes it, and discharges it into the air guide pipe 72, which then flows into the upper branch pipe 73 and the lower branch pipe 74. Specifically, the nitrogen discharged from the upper branch pipe 73 is guided by the dispersion guide part 76 in the guide sleeve 75 at the end to the area below the laser distance sensing composite module 3, which can clean the dust attached to the bottom of the laser distance sensing composite module 3. The nitrogen guided from the lower branch pipe 74 is guided by the dispersion guide part 76 in the guide sleeve 75 at the end of the lower branch pipe 74 to the top surface of the top block 25, which cleans the dust attached to the top surface of the top block 25. Since the multiple sets of laser distance sensing composite modules 3 and multiple sets of top blocks 25 are all rotated, the high-pressure nitrogen gas discharged from the guide sleeve 75 can clean the dust from the bottom of each laser distance sensing composite module 3 and the top surface of the top block 25. Combined with the exhaust dust filter assembly 5, it can efficiently clean the dust remaining inside the pump housing 1, further reduce the dust from obstructing the laser circuit, and further improve the monitoring accuracy.

[0041] Nitrogen gas is ejected through the guide sleeve 75 at the end of the upper branch pipe 73. The high-pressure airflow directly hits the laser distance sensing composite module 3 through the port 12 on the tray 11. This not only cleans the dust adhering to the bottom of the laser distance sensing composite module 3, but also removes the heat from the laser distance sensing composite module 3, thus cooling it down. Nitrogen gas ejected through the guide sleeve 75 at the end of the lower branch pipe 74 to the top of the top block 25 can also quickly cool the top block 25. Through heat conduction, the plunger 23 at the bottom of the top block 25 can also be quickly cooled down, resulting in a good cooling effect for the entire device.

[0042] The inner shell 61 and outer ring plate 62 in the guide ring housing 6 allow nitrogen discharged from the exhaust dust filter assembly 5 to be recirculated and used by the air pump 71. External nitrogen only needs to be periodically replenished into the inner shell 61 through the inlet pipe 41. A pressure sensor can be installed inside the inner shell 61. Once the internal pressure of the inner shell 61 drops to a preset value, the solenoid valve 42 automatically opens, and nitrogen is automatically replenished into the inner shell 61 through the inlet pipe 41. The inner shell 61 and outer ring plate 62 are fixed by bolts using the ear plate 63 between them. The inner shell 61 and outer ring plate 62 can be disassembled, and the front shell 522 in the dust collection housing 52 can be disassembled for periodic cleaning of the dust remaining in the front shell 522.

[0043] Furthermore, the dispersion guide section 76 includes a shaft 761, a guide vane 762, and a counterweight 763. The shaft 761 is rotatably disposed inside the guide sleeve 75, and the guide vane 762 and the counterweight 763 are respectively fixedly disposed on opposite sides of the shaft 761.

[0044] The dispersing guide section 76 in the guide sleeve 75 is installed at the end of the guide sleeve 75 near the outer region. The counterweight 763 is heavier than the guide vane 762. The gas discharged from the guide sleeve 75 blows to the guide vane 762 and the counterweight 763. The rotating guide vane 762 and the counterweight 763 guide the nitrogen gas to disperse over a larger area, so that more dust is cleaned from the bottom of the laser distance sensing composite module 3 and the top surface of the top block 25, thus increasing the dust cleaning area. The asymmetrical design of the guide vane 762 and the counterweight 763 also ensures that the airflow guided by the dispersing guide section 76 is discharged in a turbulent state, making it easier to disperse the dust attached to the surface.

[0045] The aforementioned precision measuring device for double-sided spinning machines is unable to efficiently clean the dust adhering to the inner wall of the mounting cavity inside the pump housing 1. The dust adhering to the inner wall of the mounting cavity inside the pump housing 1 can also easily affect the laser circuit when it is scattered inside the pump housing 1, resulting in a reduction in detection accuracy.

[0046] Please see Figure 4 , Figure 8 , Figure 9 andFigure 10 The precision metering device for the double-sided spinning machine also includes a flow guiding assembly 8, which comprises a fixed sleeve 81 and fan blades 82. The fixed sleeve 81 is fixed to the outside of the drive shaft 27 and is located above the laser distance sensing composite module 3. Multiple sets of fan blades 82 are arranged outside the fixed sleeve 81. The precision metering device for the double-sided spinning machine also includes an inner wall cleaning assembly 9. Two sets of inner wall cleaning assemblies 9 are arranged in a ring array on the sides of the two fan blades 82. The inner wall cleaning assembly 9 includes an upper support bar 91, a lower support part 92, and a cleaning bar 93. The upper support bar 91 is fixedly connected to the end of the fan blade 82, and the fan blade 82 is located below the upper support bar 91. The cleaning bar 93 connects the upper support bar 91 and the lower support part 92, and is located outside the upper support bar 91 and the lower support part 92. The lower support part 92 includes side bar I 921, side bar II 922, connecting block 923, and limiting support bar 924. Two connecting blocks 923 are connected to the side strip I 921 and side strip II 922 near the fan blade 82. The limiting support strip 924 is fixed to the upper connecting block 923 near the fan blade 82 and makes limiting contact with the upper support strip 91. The side strip I 921 is set higher than the side strip II 922.

[0047] The rotating drive shaft 27 drives the external fixed sleeve 81 and fan blades 82 to rotate. The rotating fan blades 82 create airflow inside the pump housing 1, making it easier for dust adhering to the inner wall of the pump housing 1 to be disturbed in the air and eventually discharged and cleaned through the exhaust dust filter assembly 5. While the fan blades 82 are rotating, the two sets of inner wall cleaning assemblies 9 will also rotate synchronously to clean the dust remaining on the inner wall of the mounting cavity inside the pump housing 1. The specific cleaning process is as follows: the rotating fan blades 82 will drive the inner wall cleaning assembly 9 at the end to rotate centrifugally. The cleaning strip 93 on one side of the lower support 92 between the centrifugally rotating upper support strip 91 and lower support 92 will contact the inner wall of the pump housing 1 to clean the adhering dust, making the inside of the pump housing 1 cleaner, further reducing the impact of dust on the laser path and improving measurement accuracy.

[0048] The inner wall cleaning component 9, moving along the inner wall of the pump housing 1, will inevitably come into contact with the air guide pipe 72 in the pneumatic dust removal component 7. Specifically, the side strip I 921 of the rotating upper support bar 91 will pre-contact the air guide pipe 72. After contact, side strip I 921, along with side strip II 922 and the cleaning strip 93, will bend and pass over the air guide pipe 72 to avoid it. The top of side strip I 921 being higher than side strip II 922 limits the bending angle of the lower support part 92 to a certain extent when side strip I 921 bends. The limiting support bar 924 limits the movement of the bent lower support part 92 towards the axis, ensuring better contact with the inner wall of the tray 11 for cleaning when the lower support part 92 and the lower section of the cleaning strip 93 bend together.

[0049] It should be noted that the specific models and specifications of the aforementioned laser distance sensing composite module 3, solenoid valve 42, fan 51, and air pump 71 need to be selected and determined based on the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, and therefore will not be described in detail. The power supply and principles of the laser distance sensing composite module 3, solenoid valve 42, fan 51, and air pump 71 are clear to those skilled in the art, and will not be described in detail here. Among them, the laser distance sensing composite module 3 is a composite module group of laser distance sensor, wireless transmission module, wireless power supply module, control module, etc. It can transmit the obtained information wirelessly, interface with external systems to obtain data and complete calculations. The specific transmission and calculation are existing technologies that can be obtained by those skilled in the art, and will not be described in detail here.

[0050] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals 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.

[0051] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A precision metering device for a double-sided spinning machine, characterized in that, It includes: Pump shell (1) and pump inner assembly (2), the pump inner assembly (2) includes cylinder (21), liquid distribution pump cover (22), plunger (23), top block (25) and transmission shaft (27), the liquid distribution pump cover (22) is installed at the bottom of cylinder (21), a plurality of plunger (23) is arranged with cylinder (21), the top block (25) is installed at the top of plunger (23), a plurality of plunger (23) is provided with swash plate (24) outside, the pump shell (1) is combined in cylinder (21) outside and is connected with liquid distribution pump cover (22), the transmission shaft (27) rotates and penetrates the top wall of pump shell (1) and is connected with cylinder (21) to drive cylinder (21) to rotate, the swash plate (24) is left with installation cavity between the top wall inside pump shell (1), and the installation cavity is provided with tray (11) fixed on the outside of transmission shaft (27), the tray (11) is provided with through hole (12) corresponding to top block (25) vertically; Laser distance sensing composite module (3), a plurality of laser distance sensing composite modules (3) are correspondingly installed on the tray (11) above the through hole (12); Air inlet cooling and dust removal assembly (4), the air inlet cooling and dust removal assembly (4) includes air inlet pipe (41) and electromagnetic valve (42), one end of the air inlet pipe (41) is communicated with the installation cavity inside the pump shell (1), the electromagnetic valve (42) is installed in cooperation with the air inlet pipe (41), and the side wall of the pump shell (1) is provided with an air outlet opposite to the air inlet cooling and dust removal assembly (4).

2. The precision metering device for a double-sided spinning machine according to claim 1, characterized in that It also includes exhaust filter dust assembly (5), the exhaust filter dust assembly (5) includes fan (51) and dust collecting shell (52), one end of the dust collecting shell (52) is communicated with the air outlet of the side wall of the pump shell (1), and the fan (51) is installed in the dust collecting shell (52).

3. The precision metering device for a double-sided spinning machine according to claim 2, characterized in that The dust collecting shell (52) includes rear shell (521), front shell (522) and filter screen (523), one end of the rear shell (521) is fixedly provided with the tray (11) and communicated with the air outlet, the front shell (522) is detachably provided with the rear shell (521), the filter screen (523) is provided at one end of the front shell (522) away from the rear shell (521), and the fan (51) is installed in the rear shell (521).

4. The precision metering device for a double-sided spinning machine according to claim 3, characterized in that The exhaust filter dust assembly (5) further includes grid (53), which is provided at one end of the fan (51) close to the filter screen (523).

5. The precision metering device for a double-sided spinning machine according to claim 3, characterized in that, The inner wall of the rear shell (521) is provided with internal threads, and the outer wall of the front shell (522) close to the rear shell (521) is provided with matched external threads.

6. The precision metering device for a double-sided spinning machine according to claim 3, characterized in that, The dust collecting shell (52) further includes anti-skid ribs (524), and a plurality of anti-skid ribs (524) are arranged in an annular array on the outer surface of the front shell (522).

7. The precision metering device for a double-sided spinning machine according to claim 1, characterized in that, The top of the pump shell (1) is provided with a bearing (13) matched with the transmission shaft (27).

8. The precision metering device for a double-sided spinning machine according to claim 1, characterized in that, The middle part of the tray (11) is provided with a mounting port (14), the transmission shaft (27) penetrates the mounting port (14) and is fixedly connected with the tray (11), and a gap is arranged between the outer edge of the tray (11) and the inner wall of the pump shell (1).

9. The precision metering device for a double-sided spinning machine according to claim 1, characterized in that, The pump inner assembly (2) further comprises a limiting disc (26) which is fixedly connected with the swash plate (24) in the pump shell (1) and is in rotating cooperation with the swash plate (24), and the top of the limiting disc (26) is provided with a guide ring (28).

10. The precision metering device for a double-sided spinning machine according to claim 1, characterized in that, The middle part of the swash plate (24) is provided with an avoiding port (29) which is penetrated by the transmission shaft (27).

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