Automatic papermaking reagent adding device

Abstract

The invention discloses an automatic papermaking reagent adding device which comprises a storage tank, a plurality of reagent tanks are arranged on the inner wall of the storage tank, electromagnetic valves are arranged on the reagent tanks and electrically connected with a liquid level meter, a gear ring is arranged on the storage tank and connected with a torque input part, a plurality of fluted discs are connected to the inner side of the gear ring and rotationally installed on the storage tank, and a plurality of reagent tanks are arranged on the inner wall of the storage tank. The bottom surface of the fluted disc is coaxially and fixedly connected with a rotating rod, the bottom end of the rotating rod extends into the medicament tank, and a stirring paddle is arranged at the bottom end of the rotating rod. Through signal linkage of the magnetic floating ball liquid level meter and the electromagnetic valve, the corresponding agent tank is accurately triggered to add according to the paper pulp liquid level height in real time, the purpose of rapidly and accurately selecting different agents according to the paper pulp capacity is achieved, meanwhile, the threaded rotating rod is driven to rotate synchronously through lifting of the floating ball, and the effect of automatic feeding is achieved through the arrangement of the gear ring and the gear disc. The medicament in the plurality of medicament tanks can be forcibly stirred, so that the mixing uniformity degree of the added medicament is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of papermaking equipment, in particular to an automatic papermaking agent adding device. Background Art

[0002] In the papermaking process, the selection and addition of chemical agents is a key step in influencing paper quality. Traditionally, the method of controlling chemical dosage based on pulp volume relies on manual addition. Workers dissolve and mix the appropriate chemicals according to the selected pulp volume type and then add them to the production container.

[0003] In order to further improve the efficiency of dosing and work safety, the existing technology is equipped with a drug dosage control system. The operator pre-configures different types of drug solutions, transfers them to multiple drug storage tanks for standby after preliminary stirring, and when producing pulp of different scales, the pulp volume information is transmitted through the liquid level meter or line production equipment to trigger the doser to work, thereby adding the corresponding drug solution into the production tank to avoid the inconvenience of temporarily allocating drugs when switching production scales.

[0004] However, due to the intermittent nature of paper production orders, some volumetric pulp production often has long intermittent periods, which means that the corresponding pre-made agents are left standing for too long, causing the powder and paste inside to precipitate or even agglomerate, resulting in uneven mixing of the agents and affecting the quality of pulp production. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic papermaking agent adding device to solve the technical problem in the prior art of reducing production efficiency due to manual secondary stirring.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A papermaking reagent automatic adding device includes a storage tank, wherein a plurality of reagent tanks of different heights are arranged in a stepped manner on the inner wall of the storage tank, and a solenoid valve is provided on the discharge port of each reagent tank. The solenoid valve is electrically connected to a liquid level meter. When the liquid level meter detects that the pulp liquid level is at different heights, the solenoid valve of the corresponding reagent tank is triggered to open and discharge the reagent;

[0008] A gear ring is coaxially rotated at the upper position of the storage tank, and the gear ring is connected to a torque input member that provides rotational power. A plurality of gear discs are meshed and connected to the inner side of the gear ring. The gear discs and the storage tank are arranged correspondingly in the vertical direction. The gear discs are axially rotated and installed on the storage tank through a support rod. A rotating rod is coaxially fixedly connected to the bottom surface of the gear disc. The bottom end of the rotating rod extends into the medicine tank, and a stirring paddle is provided at the bottom end of the rotating rod.

[0009] As a preferred solution of the present invention, the liquid level gauge is a magnetic float liquid level gauge, which includes a guide rod, a float and a terminal signal. The guide rod is coaxially fixed in the middle of the storage tank, the terminal signal is fixed on the top of the guide rod, and the float is slidably arranged on the guide rod body. When the terminal signal is located at different heights in the storage tank through the float, the terminal signal transmits a valve opening signal to the solenoid valve of the medicine tank at the corresponding height.

[0010] As a preferred solution of the present invention, the medicine tank includes a low-position medicine tank located at the lowest position and a bulk medicine tank located above the low-position medicine tank, a threaded groove is provided on the outer wall of the rotating rod in the middle of the low-position medicine tank to form a threaded rotating rod, a sliding rod is slidably provided in the threaded groove, and the sliding rod is connected to a driving member, and the driving member is used to drive the sliding rod to move along the axial direction of the storage tank;

[0011] The torque input member is a geared disc connected to the top of the threaded rotating rod.

[0012] As a preferred solution of the present invention, the end of the sliding rod inserted into the threaded groove is hemispherical, and the arc surface of the end of the sliding rod is arranged toward the extension direction of the threaded groove.

[0013] As a preferred solution of the present invention, the driving member is the float, and the sliding rod is fixedly connected to the float.

[0014] As a preferred solution of the present invention, a limiting track is provided on the guide rod along the axial direction of the guide rod, a slider is slidably provided in the limiting track, and the slider is fixedly connected to the float.

[0015] As a preferred solution of the present invention, the floats are protruding from both ends of the slider, and both ends of the slider are inclined to form a material removal slope.

[0016] As a preferred solution of the present invention, an annular groove is provided on the upper tank wall of the storage tank, the outer side of the gear ring is embedded in the annular groove, and the torque input member drives the gear ring to rotate axially in the annular groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention uses a magnetic float level gauge and solenoid valve signal linkage to accurately trigger the addition of reagents to the corresponding tanks in real time based on the pulp liquid level, achieving the goal of quickly and accurately selecting different reagents based on pulp capacity. The float's rise and fall simultaneously drives the threaded rotating rod to rotate, and combined with the arrangement of a gear ring and a gear disc, the reagents in multiple tanks are forcibly stirred, resulting in a more uniform mixing of the added reagents. Furthermore, the connection between the float and the threaded rotating rod allows for dynamic control of the stirring duration based on the liquid level, achieving adaptive mixing with short stirring for low-position tanks and long stirring for high-position tanks. This avoids the situation where all tanks in all positions have the same stirring duration, improving the mixing quality of the reagents while reducing the torque input power, resulting in energy savings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0020] Figure 1 Schematic diagram of the internal structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the cutaway structure of the present invention;

[0022] Figure 3 For the present invention Figure 1 Enlarged view of point A in the middle;

[0023] Figure 4 For the present invention Figure 1 Enlarged view of point B in the middle;

[0024] Figure 5 This is a schematic structural diagram of the stirring paddle of the present invention;

[0025] Figure 6 Schematic diagram of the structure of the hemispherical end of the slide rod of the present invention.

[0026] The numbers in the figure represent the following:

[0027] 1. Storage tank; 2. Chemical tank; 3. Solenoid valve; 4. Liquid level gauge; 5. Gear ring; 6. Gear disc; 7. Support rod; 8. Rotating rod; 9. Agitator; 10. Guide rod; 11. Magnetic float ball; 12. Terminal signal device; 13. Threaded slide; 14. Threaded rotating rod; 15. Sliding rod; 16. Limiting track; 17. Sliding block; 18. Annular groove. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] At present, the papermaking industry needs to add enhancers, retention and filtration aids, bactericides, cleaning agents, cylinder sticking agents, stripping agents, improvers and other agents during the papermaking process. Different volumes of pulp require the addition of different types and dosages of agents according to actual production conditions.

[0030] Therefore, in actual production, corresponding reagents are allocated for backup according to the commonly used production volume. When the pulp production scale of storage tank 1 is changed, the corresponding reagents can be quickly added to improve production efficiency. However, some reagents will precipitate or even clump after being stationary for a long time. In the existing technology, some engineers, based on production experience, will manually stir some reagent tanks 2 again before unloading. This is relatively inconvenient in practice and will reduce production time.

[0031] Therefore, if Figures 1 to 6 As shown, the present invention provides an automatic papermaking agent adding device, which senses the liquid level height through the float 11, and drives all the agent tanks 2 to stir synchronously, so as to improve the uniformity of the agents in all the agent tanks 2 before unloading. Furthermore, the present invention can flexibly manage the stirring degree of each agent tank 2 according to the different liquid level heights without using additional automatic driving parts. When producing small batches of pulp, the stirring time of the corresponding agent is short, and when producing large batches of pulp, the stirring time of the corresponding agent is long. This can simultaneously improve the mixing uniformity of various agents while reducing the driving power.

[0032] Specifically, such as Figure 1 As shown, the present invention includes a storage tank 1 for placing pulp. The top of the storage tank 1 is provided with a top plate (tank cover). The storage tank 1 is provided with a feed port. The inner wall of the storage tank 1 is provided with a plurality of reagent tanks 2 of different heights arranged in a stepped manner. The reagent tanks 2 are fixedly mounted on the inner wall of the storage tank 1. The bottom of each reagent tank 2 is provided with a discharge port. The discharge port adopts a circular opening design. The diameter can be adjusted according to the viscosity and properties of the reagent. For example, a larger diameter is used for a high-viscosity reagent. A solenoid valve 3 is fixedly mounted on the discharge port. The solenoid valve 3 is a normally closed solenoid valve 3. The model can be selected as a direct-acting or pilot-operated solenoid valve 3. The valve body is made of corrosion-resistant stainless steel to adapt to the chemical properties of the reagent. The solenoid valve 3 is electrically connected to a liquid level gauge 4. When the liquid level gauge 4 monitors the pulp liquid level at different heights, it triggers the solenoid valve 3 of the corresponding reagent tank 2 to open and discharge the reagent.

[0033] like Figure 2 As shown, the liquid level gauge 4 is a magnetic float liquid level gauge, which includes a guide rod 10, a float 11 and a terminal signal device 12. The guide rod 10 is a stainless steel rod, which is coaxially fixed in the middle of the storage tank 1. Its length covers the possible pulp liquid level height range in the storage tank 1. The terminal signal device 12 is fixed on the top of the guide rod 10. The float 11 is made of corrosion-resistant polypropylene or stainless steel and has magnetic elements embedded inside. The float 11 is slidably set on the rod body of the guide rod 10. The terminal signal device 12 is fixed on the top of the guide rod 10 and has a built-in magnetic sensor (such as a reed switch or a Hall sensor) and a signal processing module, which can detect the magnetic field position of the float 11 and convert it into an electrical signal.

[0034] like Figure 2 As shown, the terminal signal device 12 is electrically connected to the solenoid valve 3 of each reagent tank 2 through a shielded signal line or a wireless linear signal. A plurality of liquid level height thresholds (such as H1, H2, H3, corresponding to the height positions of different reagent tanks 2) are preset inside the terminal signal device 12, and each threshold is bound to the solenoid valve 3 of the corresponding reagent tank 2. When the float 11 rises to a certain preset height along with the pulp liquid level and stays at this height for more than a preset time (such as 3-5 seconds, to avoid false triggering caused by liquid level fluctuations and false triggering when the liquid level passes the low threshold), the terminal signal device 12 generates a valve opening signal, which is transmitted to the control circuit of the corresponding solenoid valve 3 through the signal transmission, drives the electromagnetic coil to energize, opens the valve core, and the medicine begins to be released. In this way, the terminal signal device 12 can transmit a valve opening signal to the solenoid valve 3 of the reagent tank 2 at the corresponding height when the float 11 is located at different heights in the storage tank 1.

[0035] like Figure 2 As shown, a gear ring 5 is coaxially rotated at the upper position of the storage tank 1. An annular groove 18 is provided on the upper tank wall of the storage tank 1. The outer side of the gear ring 5 is embedded in the annular groove 18. The gear ring 5 is connected to a torque input member that provides rotational power. The torque input member drives the gear ring 5 to rotate axially in the annular groove 18. A plurality of toothed discs 6 are meshed and connected to the inner side of the gear ring 5. The toothed discs 6 and the storage tank 1 are arranged in a vertical direction. The toothed discs 6 are axially rotated and mounted on the storage tank 1 via a support rod 7. The bottom surface of the toothed disc 6 is coaxially fixedly connected to a rotating rod 8. The bottom end of the rotating rod 8 extends into the medicine tank 2, and a stirring paddle 9 is provided at the bottom end of the rotating rod 8. When the torque input member drives the gear ring 5 to rotate, the gear ring 5 drives the toothed disc 6 to rotate, and the toothed disc 6 synchronously drives the rotating shaft to rotate axially, thereby driving the stirring paddle 9 to rotate in the medicine tank 2, stirring the medicine in the medicine tank 2.

[0036] In the prior art, torque input members are available in a variety of forms. To improve the utilization rate of the device's components, enhance the device's environmental protection capabilities, reduce the device's manufacturing costs, and avoid the need for automated drive components to drive multiple rotating rods 8 to rotate synchronously and continuously, this device utilizes the longitudinal displacement of the float 11 in the magnetic float liquid level gauge to drive the gear ring 5 to rotate, enabling flexible adaptive stirring of medicine tanks 2 at different heights. Specifically, the medicine tanks 2 include a low-level medicine tank located at the lowest position and a bulk medicine tank located above the low-level medicine tank. A threaded groove 13 is provided on the outer wall of the rotating rod 8 in the middle of the low-level medicine tank to form a threaded rotating rod 14. A slide rod 15 is slidably provided within the threaded groove 13. The slide rod 15 is connected to a drive component, which is used to drive the slide rod 15 to move along the axial direction of the storage tank 1. The torque input member is a toothed disc 6 connected to the top of the threaded rotating rod 14. The drive component is a float 11, and the slide rod 15 is fixedly connected to the float 11.

[0037] like Figure 4 、 Figure 5 and Figure 6 As shown, when the float 11 moves upward as the liquid level rises, the float 11 drives the slide rod 15 to move synchronously, causing the end of the slide rod 15 to slide within the threaded groove 13 along the upward extension trajectory of the threaded groove 13, thereby driving the threaded rotating rod 14 to rotate, and then driving the gear ring 5 to rotate. When the pulp liquid level is at a low level, the high-level medicine tank 2 stops stirring. When the pulp liquid level is at a high level, the high-level medicine tank 2 can be continuously stirred during the rising liquid level, so that the medicine tank 2 with a larger dosage and a wider variety of medicines can be fully stirred, thereby improving the quality of medicine stirring.

[0038] Furthermore, when producing large-scale pulp, the threaded chute 13 will be immersed in the pulp. In order to prevent the pulp from remaining in the threaded chute 13, as shown in FIG. Figure 6 As shown, the end of the slide rod 15 inserted into the threaded groove 13 is set in a hemispherical shape, and the arc surface of the end of the slide rod 15 is set toward the extension direction of the threaded groove 13. When the slide rod 15 rises, the arc surface contacts the threaded groove 13 to lift it up, so as to reduce friction resistance and internal stress. When the slide rod 15 falls, the hemispherical plane scrapes the threaded groove 13 to remove residual pulp.

[0039] like Figure 3 As shown, in order to prevent the shaking of the pulp liquid level from causing the float 11 to rotate and adversely affecting the rotation of the threaded rotating rod 14, a limiting track 16 is opened on the guide rod 10 along the axial direction of the guide rod 10, and a slider 17 is slidingly set in the limiting track 16, and the slider 17 is fixedly connected to the float 11.

[0040] The two ends of the slider 17 protrude from the float 11, and the two ends of the slider 17 are respectively inclined to open a material removal slope. When the float 11 falls, the slider 17 can remove the residual pulp in the limiting track 16.

[0041] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A papermaking agent automatic adding device, characterized in that: The invention comprises a storage tank (1), wherein a plurality of medicine tanks (2) of different heights are arranged in a stepped manner on the inner wall of the storage tank (1), and a solenoid valve (3) is provided on the discharge port of each medicine tank (2), wherein the solenoid valve (3) is electrically connected to a liquid level meter (4), and when the liquid level meter (4) monitors the pulp liquid level at different heights, the solenoid valve (3) of the medicine tank (2) at the corresponding position is triggered to open and discharge the medicine; A gear ring (5) is coaxially rotated at the upper position of the storage tank (1), and the gear ring (5) is connected to a torque input member that provides rotational power. A plurality of gear discs (6) are meshed and connected to the inner side of the gear ring (5), and the gear discs (6) and the storage tank (1) are arranged correspondingly in the vertical direction. The gear discs (6) are axially rotated and mounted on the storage tank (1) through a support rod (7). A rotating rod (8) is coaxially fixedly connected to the bottom surface of the gear disc (6), and the bottom end of the rotating rod (8) extends into the medicine tank (2), and a stirring paddle (9) is provided at the bottom end of the rotating rod (8).

2. The automatic papermaking agent adding device according to claim 1, characterized in that: The liquid level gauge (4) is a magnetic float liquid level gauge, comprising a guide rod (10), a float (11) and a terminal signal device (12). The guide rod (10) is coaxially fixedly arranged in the middle of the storage tank (1), the terminal signal device (12) is fixedly arranged on the top of the guide rod (10), and the float (11) is slidably arranged on the rod body of the guide rod (10). When the float (11) is located at different heights in the storage tank (1), the terminal signal device (12) transmits a valve opening signal to the solenoid valve (3) of the medicine tank (2) at the corresponding height.

3. The automatic papermaking agent adding device according to claim 2, characterized in that: The medicine tank (2) includes a low-position medicine tank located at the lowest position and a bulk medicine tank located above the low-position medicine tank. A threaded groove (13) is provided on the outer wall of the rotating rod (8) in the middle of the low-position medicine tank to form a threaded rotating rod (14). A sliding rod (15) is slidably provided in the threaded groove (13). The sliding rod (15) is connected to a driving member, and the driving member is used to drive the sliding rod (15) to move along the axial direction of the storage tank (1); The torque input member is a toothed disc (6) connected to the top of the threaded rotating rod (14).

4. The automatic papermaking agent adding device according to claim 3, characterized in that: The end of the slide rod (15) inserted into the threaded slot (13) is hemispherical, and the arc surface of the end of the slide rod (15) is arranged toward the extension direction of the threaded slot (13).

5. The automatic papermaking agent adding device according to claim 4, characterized in that: The driving member is the floating ball (11), and the sliding rod (15) is fixedly connected to the floating ball (11).

6. The automatic papermaking agent adding device according to claim 5, characterized in that: A limiting track (16) is provided on the guide rod (10) along the axial direction of the guide rod (10), a slider (17) is slidably provided in the limiting track (16), and the slider (17) is fixedly connected to the float (11).

7. The automatic papermaking agent adding device according to claim 6, characterized in that: The two ends of the slider (17) protrude from the float (11), and the two ends of the slider (17) are respectively inclined to form a material removal slope.

8. The automatic papermaking agent adding device according to claim 1, characterized in that: An annular groove (18) is provided on the upper tank wall of the storage tank (1), the outer side of the gear ring (5) is embedded in the annular groove (18), and the torque input member drives the gear ring (5) to rotate axially in the annular groove (18).

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