Uniform-speed spraying device and spraying method for paper deacidification agent

Abstract

The invention discloses a constant-speed spraying device and spraying method for a paper deacidification agent, the device comprises a liquid storage device, the liquid storage device comprises a liquid storage seat and a liquid storage bottle, the liquid storage bottle is arranged in the liquid storage seat, and a gap exists between the opening of the liquid storage bottle and the inner wall of the liquid storage seat; the liquid level balance pipe is communicated and connected with the liquid storage seat through a first pipeline; the nozzle is communicated and connected with a second pipeline, and the end part of the second pipeline is arranged in the liquid level balance pipe; the air compression electromagnetic valve is connected with compressed air through opening and closing of an air guide pipe, and the other end of the air guide pipe is connected with the nozzle in a communicating mode. Through the arrangement of the double pipelines, the upper liquid level in the liquid storage bottle is prevented from descending during spraying, the liquid suction height between the nozzle and the balance pipe is prevented from being constant, meanwhile, a deacidification agent is stably supplemented into the liquid level balance pipe at a constant speed, and therefore the spraying amount is stabilized. By monitoring the weight change of the liquid storage device and automatically adjusting the opening degree of the corresponding air compression electromagnetic valve, the spraying amount of the nozzle tends to be more stable.

Description

Technical Field

[0001] This invention relates to the field of formulation spraying equipment technology, and particularly to a uniform spraying device and spraying method for a paper deacidifying agent. Background Technology

[0002] With the improvement of storage conditions, paper acidification has become the main cause of the aging and brittleness of paper cultural relics and archives, which leads to their self-destruction. Deacidifying acidified paper and extending the life of paper cultural relics and archives has gradually become an industry consensus.

[0003] According to relevant standards, the required pH range for deacidified acidified paper is relatively narrow, with the optimal range being neutral to slightly alkaline (pH 7-8.5). Both excessive and insufficient pH will increase paper instability and be detrimental to storage. Paper deacidification is essentially a chemical titration process of acid-base neutralization. To meet the above requirements for precise deacidification, the uniformity of the deacidifying agent applied to the acidified paper is of paramount importance.

[0004] Existing deacidifying agent spraying or misting devices and methods, such as the deacidifying spraying setup invented in patent ZL202021452601.3 "Deacidifying Spray Device and Spray Deacidifying Machine," use a driving mechanism to cause the deacidifying nozzle to swing left and right relative to the direction of movement of the lead screw sliding mold. This effectively overcomes the problem of uneven fan-shaped spraying, thus ensuring that the sprayed deacidifying agent mist can be evenly distributed on the surface of the paper to be deacidified. However, this only solves the problem of the spatial uniformity of the deacidifying agent on the surface of the paper to be deacidified. It does not solve the problem of the spray volume changing over time due to factors such as changes in the height difference between the deacidifying agent liquid surface and the nozzle, and changes in the pressure and flow rate of the compressed air introduced into the nozzle. This is the problem of uneven distribution of deacidifying agent over time. Summary of the Invention

[0005] In view of this, the present invention proposes a uniform spraying device and method for paper deacidifying agent, which can ensure the uniformity of deacidifying agent spraying on the paper surface over time. The present invention provides the following technical solution:

[0006] A uniform spraying device for a paper deacidifying agent includes: a liquid storage device comprising a liquid storage base and a liquid storage bottle, the liquid storage bottle being placed inside the liquid storage base, and a gap existing between the bottle opening and the inner wall of the liquid storage base; a liquid level balancing pipe, the liquid level balancing pipe being conductively connected to the liquid storage base via a first pipe; a nozzle, the nozzle being conductively connected to a second pipe, the end of the second pipe being placed inside the liquid level balancing pipe; and a pneumatic solenoid valve, the pneumatic solenoid valve being open-closed by compressed gas via a gas guide pipe, the end of the gas guide pipe being conductively connected to the nozzle.

[0007] Furthermore, the device also includes a pressure weighing device, on which the liquid storage device is placed, enabling real-time measurement of the weight change of the liquid storage device. The pressure weighing device is communicatively connected to a controller, which is also communicatively connected to the pneumatic solenoid valve, so as to control the opening and closing range of the pneumatic solenoid valve by monitoring the weight change of the liquid storage device.

[0008] Furthermore, the storage bottle is inverted in the storage base, and the storage bottle contains a deacidifying agent, which flows into the storage base through the bottle opening.

[0009] Furthermore, the first pipeline is located at the bottom end of the liquid reservoir.

[0010] Furthermore, the end face of the opening of the liquid level balancing tube is set higher than the mouth of the liquid storage bottle, so that the deacidifying agent in the liquid storage seat flows into the liquid level balancing tube through the first pipeline, and the liquid level of the deacidifying agent in the liquid storage seat is level with the liquid level of the deacidifying agent in the liquid level balancing tube.

[0011] Furthermore, the nozzle is selected as a Venturi nozzle.

[0012] Furthermore, one end of the pressure weighing device is fixed to the plane, while the other end is suspended in the air. The liquid storage seat is located at the suspended end to prevent vibration of the liquid storage seat.

[0013] Furthermore, an adjustable support (240) is provided on the inner wall of the liquid storage bottle, and the liquid storage bottle is placed on the support.

[0014] Furthermore, the second pipeline is also equipped with a waste liquid valve for discharging the deacidifying agent.

[0015] This invention further discloses a method for uniformly spraying a paper deacidifying agent, applied to the aforementioned uniformly spraying device. The method includes: adding deacidifying agent into a storage bottle, ensuring that the liquid level of the deacidifying agent in the storage bottle is higher than the liquid level of the deacidifying agent in the storage base; adjusting the installation height of the storage bottle so that the liquid surface of the liquid level balancing tube is flush with the liquid surface in the storage base and lower than the end face of the opening of the liquid level balancing tube; adjusting the end height of the second pipeline located in the liquid level balancing tube so that the end of the second pipeline is lower than the liquid level of the deacidifying agent in the liquid level balancing tube; and controlling the opening and closing of the pneumatic solenoid valve so that the nozzle draws in and uniformly sprays the deacidifying agent through the second pipeline.

[0016] This invention employs a dual-pipeline setup with a first pipeline and a second pipeline. This avoids the spray volume variations caused by the drop in the liquid level in the storage bottle due to deacidifying agent consumption, which leads to changes in the liquid suction height between the nozzle and the liquid level balance tube, as is common when using a single pipeline. The second pipeline ensures a constant liquid suction height between the nozzle and the balance tube, while the first pipeline replenishes the deacidifying agent to the liquid level balance tube at a uniform and stable rate, thus stabilizing the spray volume. Simultaneously, by monitoring changes in the weight of the storage device and automatically adjusting the opening of the corresponding pneumatic solenoid valve, the pressure and flow rate of compressed air are altered to smooth fluctuations in the liquid consumption rate, making the nozzle spray volume more stable and ultimately achieving uniform spraying of the deacidifying agent onto the paper surface in a spatial dimension. Attached Figure Description

[0017] For illustrative and not limiting purposes, the present invention will now be described in conjunction with embodiments and accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the uniform spraying device for paper deacidifying agent in an embodiment of the present invention.

[0019] Figure label:

[0020] 100. Pressure weighing device; 200. Liquid storage base; 210. First pipeline; 230. Liquid level balance pipe; 240. Support base; 300. Liquid storage bottle; 310. Bottle mouth; 320. Deacidifying agent; 400. Waste liquid valve; 500. Second pipeline; 600. Air compressor solenoid valve; 700. Nozzle; 800. Controller. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present 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 the present application, and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first," "second," etc., in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Furthermore, some of the aforementioned terms, besides indicating location or positional relationships, may also have other meanings. For example, the term "above" may, in certain circumstances, indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances. Additionally, the term "multiple" should mean two or more.

[0025] It should be noted that, where there is no conflict, the embodiments and features of the embodiments in this application can be combined with each other. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0026] refer to Figure 1 This embodiment discloses a uniform spraying device for a paper deacidifying agent. The spraying device includes a liquid storage device in which the deacidifying agent 320 is stored and replenished at a uniform rate. Specifically, the liquid storage device includes a liquid storage base 200, a support base 240, and a liquid storage bottle 300. The support base 240 is height-adjustably mounted on the inner wall of the liquid storage base 200, and the liquid storage bottle 300 is placed on the support base 240.

[0027] The uniform spraying device also includes a liquid level balancing pipe 230, which has an open top, with its upper end higher than the height of the mouth 310 of the storage bottle 300. A first pipe 210 is provided at its bottom, with the other end of the first pipe 210 passing through the storage base 200 and positioned at its bottom. Since the first pipe 210 and the liquid level balancing pipe 230 are interconnected, the deacidifying agent 320 in the storage bottle 300 flows into the liquid level balancing pipe 230 through the first pipe 210, thus achieving a level between the deacidifying agent 320 in the liquid level balancing pipe 230 and the level of the deacidifying agent 320 in the storage base 200. Specifically, because there is a gap between the body of the storage bottle 300 and the inner wall of the storage base 200, under the same atmospheric pressure, the liquid level of the deacidifying agent 320 in the storage base 200 is flush with the liquid level in the liquid level balancing pipe 230. Deacidifying agent 320 is injected into the storage bottle 300. When the nozzle sprays, the level of deacidifying agent 320 in the liquid level balance tube 230 drops, causing the liquid level in the storage seat 200 to drop through the first pipeline. A gap is created between the bottle opening 310 of the storage bottle 300 and the storage seat 200, causing air to be forced into the storage bottle 300. The deacidifying agent 320 continuously flows through the bottle opening 310, the storage seat 200, and the first pipeline 210 to replenish the liquid level balance tube 230, thus balancing the liquid level in the storage seat 200. The deacidifying agent 320 in the leveling pipe 230 reaches a dynamic equilibrium state until the spraying stops. The liquid level in the leveling pipe 230 and the liquid level in the storage tank 200 return to their initial states. The opening 310 of the storage bottle 300 is sealed by the deacidifying agent 320, preventing air from entering the storage bottle 300 and thus preventing the deacidifying agent 320 from continuing to flow out. This maintains a dynamic equilibrium between the storage tank 200 and the leveling pipe 230. This process is repeated continuously during spraying. In one or more embodiments, a waste liquid valve 400 for discharging the deacidifying agent 320 is also provided on the first pipeline 210.

[0028] To achieve the atomization and spraying of the deacidifying agent 320, this embodiment employs a combination structure of a pneumatic solenoid valve 600 and a nozzle 700, preferably a Venturi nozzle. The Venturi nozzle utilizes the Venturi effect, discovered by the Italian physicist Venturi, which refers to the pressure reduction near a high-speed flowing gas, resulting in adsorption. Accordingly, when gas passes through a constricted cross-section, its velocity increases and its pressure decreases, creating a negative pressure (vacuum), drawing in liquid (or gas). The air and liquid mix rapidly and efficiently before being ejected at high speed from the nozzle outlet. To ensure the uniformity of the deacidifying agent over time, specifically, the nozzle 700 is connected to a second pipe 500, the other end of which is placed in a liquid level balancing pipe 230, with the end of the second pipe 500 set below the liquid level of the deacidifying agent 320 in the liquid level balancing pipe 230. To prevent the second pipeline 500 from changing its end position due to shaking or other reasons, a fixing point is provided outside the liquid level balance pipe 230 for the second pipeline 500. This prevents the end position of the second pipeline 500 from changing due to changes in the position of the nozzle 700, thereby improving the uniformity of the deacidifying agent 320 spray. The pneumatic solenoid valve 600 is used to obtain different air flow rates by changing its opening and closing degree, thereby controlling the amount of deacidifying agent sprayed by the nozzle 700 per unit time. Specifically, the pneumatic solenoid valve 600 is connected to compressed gas through an air guide pipe. (Refer to...) Figure 1 The air guide tube passes through the actuating part of the pneumatic solenoid valve 600, and after passing through the pneumatic solenoid valve 600, the end is connected to the nozzle 700. This allows a vacuum to be generated when the compressed gas is transmitted to the nozzle 700 through the air guide tube, thereby mixing the deacidifying agent 320 with the high-speed gas and spraying it out through the nozzle 700, so as to achieve uniform deacidifying agent spraying on the paper in the time dimension.

[0029] During use, there is a chance that the spray from the nozzle may be obstructed. For example, the presence of solidified material or impurities in the deacidifying agent 320 can cause blockages, resulting in uneven spraying of the deacidifying agent 320. Instability in compressed air pressure and flow rate can also lead to uneven spraying. To ensure that the amount of deacidifying agent 320 sprayed by the nozzle is the same per unit time, the uniform spraying device for deacidifying agent 320 in this embodiment also includes a pressure weighing device 100. One end of the pressure weighing device 100 is fixed to a stable frame, and the other end is suspended. In this embodiment, the liquid storage seat 200 is pressed against the suspended end, so that the pressure weighing device 100 can weigh the liquid storage device and the deacidifying agent 320 inside. For example, the pressure weighing device 100 can be a strain gauge load cell. The pressure weighing device 100 is also electrically connected to a controller 800 to transmit the real-time weighing results to the controller 800. The controller 800 also outputs control to the pneumatic solenoid valve 600 to calculate based on the read real-time weighing results and then control the opening and closing amplitude of the pneumatic solenoid valve 600 to change the content of deacidifying agent 320 sprayed per unit time. Therefore, the pressure weighing device 100 can calculate whether the consumption of deacidifying agent 320 is the same within a fixed interval, and adjust the opening of the pneumatic solenoid valve 600 according to the calculation result. For example, the controller 800 sets the spray volume of deacidifying agent 320 within a unit time or a fixed interval period. After the spraying starts, the pressure weighing device 100 calculates in real time the difference between the weight of the reservoir 200 and the weight of the deacidifying agent 320 within it at the beginning and end of the unit time or a fixed interval period, and compares the difference with the weight of the set spray volume. When the difference is less than the weight of the spray volume, the controller 800 outputs a control to increase the opening of the pneumatic solenoid valve 600. When the difference is greater than the weight of the spray volume, the controller 800 outputs a control to decrease the opening of the pneumatic solenoid valve 600. This ensures that the content of deacidifying agent 320 sprayed from the nozzle is the same within a unit time or a fixed interval period, thus achieving uniform spraying of deacidifying agent 320. In one or more embodiments, the controller 800 may also be configured to spray deacidifying agent 320 of different qualities at a uniform speed at different positions according to the difference in paper shape and thickness.

[0030] This embodiment further discloses a uniform spraying method for paper deacidifying agent 320, applied to the aforementioned uniform spraying device, the method comprising the following steps:

[0031] Add deacidifying agent 320 into the storage bottle 300, and ensure that the liquid level of deacidifying agent 320 in the storage bottle 300 is higher than the liquid level of deacidifying agent 320 in the storage base 200;

[0032] Adjust the installation height of the liquid storage bottle 300 so that the liquid level of the liquid level balance tube 230 is flush with the liquid level in the liquid storage seat (200) and lower than the end face of the opening of the liquid level balance tube 230.

[0033] Adjust the height of the end of the second pipe 500 located in the liquid level balance pipe 230 so that the end of the second pipe (500) is lower than the liquid level of the deacidifying agent 320 in the liquid level balance pipe 230;

[0034] Controlling the opening and closing of the pneumatic solenoid valve 600 allows the nozzle 700 to draw in and evenly spray out the deacidifying agent 320 through the second pipeline 500.

[0035] In summary, when the uniform spraying device in this embodiment is started, the pneumatic solenoid valve 600 is activated, and the deacidifying agent 320 is drawn away from the second pipeline 500 through the air pressure difference, causing the liquid level in the reservoir 200 to drop. A gap is created between the bottle opening 310 of the reservoir bottle 300 and the initial liquid level of the reservoir 200, and air will enter the reservoir bottle 300 through this gap. As a result, the liquid level of the deacidifying agent 320 in the reservoir bottle 300 drops, and the deacidifying agent 320 flows out from the bottle opening 310 of the reservoir bottle 300, through the first pipeline 210, and into the liquid level balance pipe 230. The liquid level in the reservoir 200 and the liquid level balance tube 230 is raised again until it reaches the mouth 310 of the reservoir bottle 300. At this point, the mouth 310 of the reservoir bottle 300 is sealed by the deacidifying agent 320, preventing air from entering the reservoir bottle 300 and thus preventing the deacidifying agent 320 from continuing to flow out. This allows the deacidifying agent 320 in the reservoir 200 and the liquid level balance tube 230 to reach a dynamic equilibrium. The above actions are repeated continuously during the spraying process to keep the liquid level of the deacidifying agent 320 in the liquid level balance tube 230 and the liquid level difference between the nozzle and the liquid level of the nozzle constant.

[0036] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A uniform speed spraying device for a paper deacidification agent, characterized in that: include: A liquid storage device, the liquid storage device comprising a liquid storage seat (200) and a liquid storage bottle (300), the liquid storage bottle (300) being placed in the liquid storage seat (200), and a gap being present between a bottle mouth (310) of the liquid storage bottle (300) and an inner wall of the liquid storage seat (200); A liquid level balance pipe (230), wherein the liquid level balance pipe (230) is conductively connected to the liquid storage seat (200) via a first pipeline (210); A nozzle (700), wherein the nozzle (700) is conductively connected to a second pipeline (500), and an end of the second pipeline (500) is placed in the liquid level balance pipe (230); An air pressure electromagnetic valve (600), wherein the air pressure electromagnetic valve (600) is connected to compressed gas through an air guide pipe, and an end of the air guide pipe is conductively connected to the nozzle (700).

2. The uniform speed spraying device of the paper deacidification agent according to claim 1, characterized in that: It also comprises a pressure weighing device (100), the liquid storage device is placed on the pressure weighing device (100), and the weight change of the liquid storage device is measured in real time through the pressure weighing device (100); The pressure weighing device (100) is communicatively connected to a controller (800), and the controller (800) is also communicatively connected to the air pressure solenoid valve (600) so as to control the opening and closing amplitude of the air pressure solenoid valve (600) by monitoring the weight change of the liquid storage device.

3. The uniform speed spraying device of the paper deacidification agent according to claim 1, characterized in that: The liquid storage bottle (300) is inverted in the liquid storage seat (200), and the liquid storage bottle (300) stores a deacidifying agent (320), which flows into the liquid storage seat (200) through the bottle mouth (310) of the liquid storage bottle (300).

4. The uniform speed spraying device of the paper deacidification agent according to claim 3, characterized in that: The opening of the first pipeline (210) is located at the bottom end of the liquid storage seat (200).

5. The uniform speed spraying device of the paper deacidification agent according to claim 4, characterized in that: The end surface of the opening of the liquid level balance tube (230) is arranged higher than the bottle mouth (310) of the liquid storage bottle (300), so that the deacidifying agent (320) in the liquid storage seat (200) flows into the liquid level balance tube (230) through the first pipeline (210), and the liquid level of the deacidifying agent (320) in the liquid storage seat (200) is level with the liquid level of the deacidifying agent (320) in the liquid level balance tube (230).

6. The uniform speed spraying device of paper deacidification agent according to claim 1, characterized in that: The nozzle (700) is a Venturi nozzle (700).

7. The uniform speed spraying device of paper deacidification agent according to claim 2, characterized in that: One end of the pressure weighing device (100) is fixed to a plane, and the other end is suspended in the air. The liquid storage seat (200) is arranged at the suspended end to prevent the liquid storage seat (200) from vibrating.

8. The uniform speed spraying device of paper deacidification agent according to claim 1, characterized in that: A height-adjustable support seat (240) is provided on the inner side wall of the liquid storage bottle (300), and the liquid storage bottle (300) is placed on the support seat (240).

9. The uniform speed spraying device of paper deacidification agent according to claim 1, characterized in that: The second pipeline (500) is also provided with a waste liquid valve (400) for discharging the deacidifying agent (320).

10. A method for uniformly spraying a paper deacidification agent, applied to the uniformly spraying device as claimed in any one of claims 1 to 9, characterized in that: The method comprises: Adding a deacidifying agent (320) into the liquid storage bottle (300), and ensuring that the liquid level of the deacidifying agent (320) in the liquid storage bottle (300) is higher than the liquid level of the deacidifying agent (320) in the liquid storage seat (200); Adjusting the installation height of the liquid storage bottle (300) so that the liquid level of the liquid level balance tube (230) is flush with the liquid level in the liquid storage seat (200) and is lower than the end surface of the opening of the liquid level balance tube (230); Adjusting the height of the end of the second pipeline (500) located in the liquid level balance pipe (230) so that the end of the second pipeline (500) is lower than the liquid level of the deacidifying agent (320) in the liquid level balance pipe (230); The opening and closing of the air pressure solenoid valve (600) is controlled so that the nozzle (700) absorbs and uniformly sprays the deacidifying agent (320) through the second pipeline (500).

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