Inflatable regulating mechanism and production device of gelatinous precipitated calcium carbonate containing the mechanism

Abstract

The present application relates to the field of calcium carbonate production, and discloses an aeration adjusting mechanism and a colloidal precipitated calcium carbonate production device containing the same, which comprises an aeration head provided with an air inlet and an air outlet, further comprising: a cavity arranged in the aeration head body, the air outlet is communicated with the air inlet through the cavity; a plugging head movably arranged in the air outlet for plugging or opening the air outlet; and an elastic member connected between the plugging head and the inner wall of the cavity. In the present application, the plugging head can effectively prevent the slurry in the reaction container from flowing back to the air outlet and the air inlet channel after stopping aeration. After the air source stops supplying air, the buffer member with greater rigidity than the elastic member drives the pressure regulating seat to reset first, so that the butt joint hole and the air outlet hole are quickly misaligned and disconnected, the air flow supply is cut off from the air inlet end, and the double protection of the plugging head and the adjusting seat avoids the slurry from breaking through the air inlet channel and flowing back to the air source opening.

Description

Technical Field

[0001] This invention relates to the field of calcium carbonate production, and more particularly to an aeration regulating mechanism and a colloidal precipitated calcium carbonate production apparatus containing the mechanism. Background Technology

[0002] The production of colloidal PCC typically employs a carbonation method, which involves introducing carbon dioxide gas into a refined calcium hydroxide slurry to induce a chemical reaction that produces calcium carbonate precipitate. In the production of colloidal precipitated calcium carbonate, the gas supply regulating mechanism is a core component. Its main function is to precisely and controllably introduce carbon dioxide gas into the carbonation reaction system, ensuring thorough and efficient mixing and reaction with the calcium hydroxide slurry. The mechanism delivers carbon dioxide gas from the gas source into the reactor and controls the amount of carbon dioxide gas introduced according to the reaction progress.

[0003] A search revealed a Chinese invention patent with publication number CN112209418A, which discloses a method for preparing colloidal precipitated calcium carbonate, comprising: adding quicklime to warm water and stirring with a stirring paddle to obtain a calcium hydroxide slurry; adding the calcium hydroxide slurry to a jacketed reaction vessel equipped with a dispersion paddle; turning on the dispersion paddle and filling the jacket with cooling circulating water to cool the calcium hydroxide slurry in the reaction vessel to below 22°C, and then filling it with carbon dioxide; simultaneously controlling the temperature of the slurry in the reaction vessel until the pH value of the slurry in the reaction vessel is below 7; and after the reaction is completed, an aqueous slurry of colloidal precipitated calcium carbonate is obtained.

[0004] When the existing gas-regulating mechanism stops gas-filling the reaction vessel, the slurry in the reaction vessel will backflow to the gas outlet, and may even flow into the gas inlet channel. The slurry will also adhere to and block the gas outlet area. Summary of the Invention

[0005] To address the problem that, after the aforementioned aeration regulating mechanism stops aeration into the reaction vessel, the slurry in the reaction vessel will backflow to the outlet, and may even flow into the air inlet channel, while the slurry will also adhere to and block the outlet area, the present invention achieves this through the following technical solution.

[0006] The inflation adjustment mechanism includes an inflation head, which has an air inlet and an air outlet, and also includes:

[0007] A cavity is located inside the inflation head body, and the air outlet is connected to the air inlet through the cavity;

[0008] A plug is movably installed inside the air outlet to block or open the air outlet.

[0009] An elastic element connects the sealing head to the inner wall of the cavity;

[0010] When gas enters the cavity through the inlet, the sealing head is driven by the air pressure to stretch the elastic element and move out of the outlet. The gas is discharged from the outlet of the inflation head. When the sealing head is reset under the action of the elastic element, the sealing head blocks the outlet to block the airflow.

[0011] In one embodiment, the sealing head includes:

[0012] A connecting rod is installed at one end on the inner wall of the cavity, the sealing head is sleeved on the other end of the connecting rod, and the elastic element is installed between the connecting rod and the sealing head.

[0013] In one embodiment, the sealing head further includes:

[0014] A rotating rod is rotatably mounted on a sealing head at one end and has a groove at the other end. A connecting rod is placed inside the groove, and an elastic element is installed between the inner wall of the groove and the connecting rod.

[0015] The cleaning component, installed on the outer periphery of the rotating rod, is used to clean the residue on the inner wall of the vent as the sealing head moves.

[0016] In one embodiment, a transmission structure is provided between the rotating rod and the connecting rod, and the rotating rod is driven to rotate through the transmission structure when the sealing head moves linearly.

[0017] In one embodiment, the transmission structure includes a groove formed on the surface of the connecting rod, and a slider fixed to the inner wall of the groove and cooperating with the groove. The groove is spiral-shaped, and when the slider moves along the groove, the rotating rod rotates on the sealing head.

[0018] In one embodiment, the cleaning element is in the form of a plate or sheet, and the number of cleaning elements is at least two.

[0019] In another embodiment, the cleaning element is in the shape of a helical blade.

[0020] In one embodiment, it also includes:

[0021] Several air outlets are provided on the inner wall of the air inlet, and the air inlet is connected to the cavity through the air outlets;

[0022] The pressure regulating seat is movably installed in the air inlet;

[0023] A buffer component, connected between the pressure regulating seat and the inner wall of the air inlet, is used to provide a restoring force for the pressure regulating seat;

[0024] The pressure regulating seat has a collection groove on one side, and a docking hole is provided on the side wall of the collection groove;

[0025] When the pressure regulating seat is driven by air pressure to compress the buffer and move, the docking hole connects with the air outlet to guide the airflow.

[0026] When the pressure regulating seat is reset under the action of the buffer, the docking hole and the air outlet are misaligned and disconnected to block the airflow.

[0027] In one embodiment, the stiffness of the buffer is greater than the stiffness of the elastic element.

[0028] A colloidal precipitated calcium carbonate production apparatus includes a reaction vessel and a flow meter, and also includes an aeration regulating mechanism of any one of the above, wherein the outlet of the aeration regulating mechanism is located inside the reaction vessel, and the flow meter is installed at the inlet of the aeration regulating mechanism.

[0029] This invention provides an aeration regulating mechanism and a colloidal precipitated calcium carbonate production apparatus containing the mechanism. Compared with the prior art, it has the following advantages: the plugging head can effectively prevent the slurry in the reaction vessel from flowing back to the air outlet and air inlet channel after aeration stops; after the air source stops supplying air, the buffer element with stiffness greater than that of the elastic element drives the pressure regulating seat to reset first, so that the docking hole and the air outlet are quickly misaligned and disconnected, cutting off the air supply from the air inlet end. The double protection of the plugging head and the regulating seat prevents the slurry from breaking through the air inlet channel and flowing back to the vicinity of the air source. Attached Figure Description

[0030] Figure 1 This is an assembly diagram of the inflation head, flow meter, and inflation head proposed in this invention.

[0031] Figure 2 This is an assembly diagram of the inflation head and flow meter proposed in this invention.

[0032] Figure 3 This is a schematic diagram of the inflation head structure proposed in this invention.

[0033] Figure 4 This is a schematic diagram of the cross-section of the inflation head proposed in this invention.

[0034] Figure 5 This is a cross-sectional schematic diagram of the inflation head proposed in this invention from another perspective.

[0035] Figure 6 This is a schematic diagram of the cross-section of the sealing head and rotating rod proposed in this invention.

[0036] Figure 7 This is a schematic diagram of the structure of the sealing head, rotating rod, and cleaning component proposed in this invention.

[0037] Figure 8 This is a schematic diagram of the connecting rod structure proposed in this invention.

[0038] Figure 9 This is a cross-sectional schematic diagram of the inflation head, air inlet, air outlet, cavity, and air outlet hole proposed in this invention.

[0039] Figure 10This is a schematic diagram of the sealing head, rotating rod, and cleaning component proposed in Embodiment 2 of the present invention.

[0040] The attached figures are labeled as follows:

[0041] 100. Inflation head; 101. Air inlet; 102. Air outlet; 103. Cavity; 104. Air vent;

[0042] 200. Pressure regulating seat; 201. Gathering groove; 202. Connecting hole; 203. Buffer component;

[0043] 300. Sealing head; 301. Rotating rod; 302. Cleaning component; 303. Groove; 304. Sliding block; 305. Connecting rod; 306. Slide groove; 307. Elastic component;

[0044] 400. Flow meter;

[0045] 500. Reaction vessel. Detailed Implementation

[0046] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0047] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0048] Example 1: Refer to Figures 3-9 The inflation adjustment mechanism includes an inflation head 100, which has an air inlet 101 and an air outlet 102. It also includes: a cavity 103 located within the inflation head 100 body, with the air outlet 102 connected to the air inlet 101 via the cavity 103; a sealing head 300 movably located within the air outlet 102 for sealing or opening the air outlet 102; and an elastic element 307 connected between the sealing head 300 and the inner wall of the cavity 103. When gas enters the cavity 103 through the air inlet 101, the sealing head 300 is driven by air pressure to stretch the elastic element 307 and move out of the air outlet 102. Gas is discharged from the inflation head 100 through the air outlet 102. When the sealing head 300 resets under the action of the elastic element 307, it seals the air outlet 102 to block airflow.

[0049] In the above technical solution, the elastic element 307 is a spring, or it can be an elastic block or other elastic structure. The automatic opening and closing of the air outlet 102 is achieved by utilizing the dynamic balance between air pressure and elastic force. When gas enters the cavity 103 from the air inlet 101, the air pressure in the cavity 103 increases, and the resulting thrust overcomes the elastic force of the elastic element 307, driving the sealing head 300 to move away from the air outlet 102 and stretching the elastic element 307, so that the air outlet 102 opens and the gas can be discharged from the air outlet 102. When the gas supply stops, the air pressure in the cavity 103 decreases, and the elastic force of the elastic element 307 is greater than the air pressure in the cavity. Under the action of the elastic force, the sealing head 300 resets and tightly fits the air outlet 102, thereby sealing the air outlet 102. This not only blocks the airflow but also prevents the slurry in the reaction vessel 500 from flowing back into the air outlet 102 and the air inlet channel through physical sealing.

[0050] Specifically, the plug head 300 can effectively prevent the slurry in the reaction vessel 500 from flowing back to the outlet 102 and the inlet channel after the gas filling stops, ensuring that the gas can be smoothly discharged when it is introduced. It has a simple structure, does not require complex electronic components, and has high operational stability.

[0051] The plugging head 300 includes: a connecting rod 305, one end of which is installed on the inner wall of the cavity 103, and the plugging head 300 is sleeved on the other end of the connecting rod 305; an elastic element 307 is installed between the connecting rod 305 and the plugging head 300; a rotating rod 301, one end of which is rotatably installed on the plugging head 300, and the other end has a groove 303, the connecting rod 305 is disposed in the groove 303, and the elastic element 307 is installed between the inner wall of the groove 303 and the connecting rod 305; and a cleaning element 302, which is installed on the outer periphery of the rotating rod 301, and the cleaning element 302 is used to clean the residue on the inner wall of the vent 102 when the plugging head 300 moves.

[0052] In the above technical solution, the connecting rod 305 provides guiding support for the sealing head 300, preventing the sealing head 300 from detaching from the inflation head 100 and allowing it to move stably along a fixed trajectory; the rotating rod 301 cooperates with the connecting rod 305 through the groove 303. When the sealing head 300 moves along the connecting rod 305 under the action of air pressure or elastic force, the inner wall of the groove 303 and the connecting rod 305 generate relative movement. The sealing head 300 drives the rotating rod 301 and the cleaning component 302 to move. The cleaning component 302 can clean the residue on the inner wall of the air outlet 102; one end of the elastic component 307 is connected to one end of the connecting rod 305 through a coupling. During the movement and rotation of the rotating rod 301, the elastic component 307 can be stretched or compressed, causing the elastic component 307 to rotate with the rotating rod 301.

[0053] Specifically, based on the original function of preventing slurry backflow, the cleaning component 302 moves with the sealing head 300 to clean the inner wall of the air outlet 102 in real time, which can effectively remove the attached slurry residue. The setting of the connecting rod 305 makes the movement of the sealing head 300 more stable, realizing the automatic opening and closing of the air outlet 102 while also having an active anti-blocking function, ensuring the smoothness and stability of gas flow.

[0054] A transmission structure is provided between the rotating rod 301 and the connecting rod 305. When the sealing head 300 moves linearly, the rotating rod 301 is driven to rotate through the transmission structure. The transmission structure includes a groove 306 formed on the surface of the connecting rod 305, and a slider 304 fixed to the inner wall of the groove 303 and cooperating with the groove 306. The groove 306 is spiral-shaped. When the slider 304 moves along the groove 306, the rotating rod 301 rotates on the sealing head 300.

[0055] In the above technical solution, when the sealing head 300 moves along the connecting rod 305 under the action of air pressure or elastic force, the inner wall of the groove 303 and the connecting rod 305 generate relative movement, driving the rotating rod 301 to rotate around the sealing head 300, so that the cleaning component 302 installed on the outer periphery of the rotating rod 301 rotates synchronously; during the process of the sealing head 300 opening or closing the air outlet 102, the rotating cleaning component 302 continuously contacts the inner wall of the air outlet 102, scraping off the attached residues. The elastic component 307 is installed between the inner wall of the groove 303 and the connecting rod 305, which not only provides elasticity for the sealing head 300 to reset, but also assists the rotating rod 301 to generate rotational power through interaction with the connecting rod 305, so as to realize the coordinated action of sealing and cleaning.

[0056] The spiral groove 306 extends along a spiral trajectory centered on the axis of the connecting rod 305. When the sealing head 300 moves axially along the connecting rod 305 under the action of air pressure or elastic force, the rotating rod 301 undergoes axial displacement along with the sealing head 300. At this time, the slider 304 is guided by the groove wall in the spiral groove 306 and will move along the spiral trajectory. This movement converts the axial linear displacement into the rotational motion of the rotating rod 301 around its own axis, so that the rotating rod 301 rotates while moving forward or backward along the axial direction.

[0057] In this embodiment, the cleaning component 302 is plate-shaped or sheet-shaped, and the number of cleaning components 302 is at least two.

[0058] In the above technical solution, the plate-shaped or sheet-shaped cleaning component 302 is designed to increase the contact area with the inner wall of the air outlet 102, so as to ensure that the residue can be fully contacted and peeled off during the scraping process; at least two cleaning components 302 are usually symmetrically or evenly distributed along the outer periphery of the rotating rod 301. When the rotating rod 301 moves in a spiral motion, the cleaning component 302 acts on the circumferential position of the inner wall of the air outlet 102, and combined with axial movement to cover different depths, forming a three-dimensional cleaning range in both circumferential and axial directions.

[0059] It also includes: several air outlets 104, which are opened on the inner wall of the air inlet 101, and the air inlet 101 is connected to the cavity 103 through the air outlets 104; a pressure regulating seat 200, which is movably disposed in the air inlet 101; a buffer 203, which is connected between the pressure regulating seat 200 and the inner wall of the air inlet 101, and is used to provide a reset force for the pressure regulating seat 200; a gathering groove 201 is provided on one side of the pressure regulating seat 200, and a docking hole 202 is opened on the side wall of the gathering groove 201; when the pressure regulating seat 200 is driven by air pressure to compress the buffer 203 and move, the docking hole 202 is connected to the air outlets 104 to conduct airflow; when the pressure regulating seat 200 is reset under the action of the buffer 203, the docking hole 202 is misaligned and disconnected from the air outlets 104 to block the airflow.

[0060] In the above technical solution, the buffer 203 can be a spring or a spring block; the linkage action of the pressure regulating seat 200 and the sealing head 300 during air pressure changes forms a graded protection. When the air source supplies air, the air pressure pushes the pressure regulating seat 200 to overcome the elastic force of the buffer 203, so that the docking hole 202 aligns with the air outlet 104. The gas enters the cavity 103 through the collecting groove 201, the docking hole 202, and the air outlet 104. After the air pressure in the cavity 103 increases, it pushes the sealing head 300 to overcome the elastic force of the elastic element 307, opening the air outlet 102 to supply air; after the air source stops, the air inlet... When the air pressure in cavity 101 disappears, the pressure regulating seat 200 resets under the action of the buffer 203. The air intake is cut off by the misalignment of the docking hole 202 and the air outlet 104. The air in cavity 103 is not continuously replenished and the pressure drops sharply. At this time, the sealing head 300 resets under the action of the elastic force of the elastic element 307. Since there is no air pressure in cavity 103 to counteract the elastic force, the sealing head 300 can tightly seal the air outlet 102. Since the upstream air intake has been cut off by the pressure regulating seat 200, there is no sealing gap caused by airflow impact. The slurry cannot seep in or backflow under the action of pressure difference, realizing full-path anti-backflow protection from the air intake end to the air outlet end.

[0061] The stiffness of the buffer 203 is greater than that of the elastic element 307. The pressure regulating seat 200 resets and blocks the airflow before the sealing head 300 resets and blocks the air outlet 102.

[0062] In the above technical solution, the stiffness difference between the buffer 203 and the elastic element 307 is used to control the response speed of their reset forces. When the air source supplies air, the air pressure needs to overcome the elastic force of both the buffer 203 and the elastic element 307. Because the buffer 203 has greater stiffness, the initial air pressure required for the pressure regulating seat 200 to move is higher. Sufficient air pressure is ensured before the air intake is opened. After the air source stops, the air pressure disappears, and the more stiff buffer 203 can generate a stronger initial reset force, allowing the pressure regulating seat 200 to move. The sealing head 300 moves first and quickly completes the misalignment and isolation between the docking hole 202 and the vent hole 104, cutting off the air intake; the elastic element 307 has low rigidity and the reset force increases slowly, so the sealing head 300 resets late, providing time for the residual gas in the cavity 103 to be discharged. When the pressure in the cavity drops to close to the pressure of the reaction vessel 500, the sealing head 300 resets and seals the vent hole 102 under the action of the elastic element 307, eliminating the interference of pressure difference on the seal and achieving a more reliable anti-backflow effect.

[0063] Example 2: Refer to Figure 10 The difference between this embodiment and Embodiment 1 is that the cleaning component 302 is in the shape of a spiral blade.

[0064] In the above technical solution, the blades of the spiral blade-shaped cleaning component 302 are distributed in a spiral pattern along the outer periphery of the rotating rod 301. When the rotating rod 301 moves in a spiral motion with the sealing head 300, the spiral blades rotate synchronously. When the spiral surface of the blades comes into contact with the slurry around the air outlet 102, an axial component force is generated along the spiral direction. This component force is used to transport the slurry away from the air outlet 102 along the spiral trajectory of the blades. During the process of the sealing head 300 moving towards the air outlet 102 to seal, this conveying action precedes the sealing action, discharging the slurry near the air outlet 102. This ensures that the sealing head 300 is in a relatively clean environment when it enters the air outlet 102, preventing the slurry from being carried in, and achieving the linkage and coordination of cleaning, conveying and sealing.

[0065] Specifically, when the spiral blade-shaped cleaning component 302 rotates with the rotating rod 301, its spiral structure generates a directional conveying force on the slurry around the air outlet 102, which can actively push the slurry to an area away from the air outlet 102. This prevents the sealing head 300 from bringing the surrounding slurry into the air outlet 102 when it resets and enters the air outlet 102, reducing the adhesion of slurry on the inner wall of the air outlet 102 and the surface of the sealing head 300, and further reducing the risk of blockage. At the same time, the continuous spiral surface of the spiral blades can continuously scrape the inner wall of the air outlet 102, improving the comprehensiveness and thoroughness of the cleaning. This, combined with the conveying action, enhances the anti-blockage effect and ensures the long-term unobstructed flow of the air outlet 102.

[0066] Example 3: Refer to Figure 1 and Figure 2A colloidal precipitated calcium carbonate production apparatus includes a reaction vessel 500 and a flow meter 400. The outlet 102 of the gas regulating mechanism is located inside the reaction vessel 500, and the flow meter 400 is installed at the inlet 101 of the gas regulating mechanism. The flow meter 400 is used to regulate the gas flow rate.

[0067] During use, an external carbon dioxide gas source introduces gas into the air inlet 101 of the inflation head 100, and the gas first acts on the pressure regulating seat 200 inside the air inlet 101. When the air pressure overcomes the elastic force of the buffer 203, the air pressure pushes the pressure regulating seat 200 to move axially along the air inlet 101, simultaneously compressing the buffer 203. As the pressure regulating seat 200 moves, the docking hole 202 on the side wall of its gathering groove 201 gradually aligns with the air outlet 104 on the inner wall of the air inlet 101, ultimately achieving docking and connection, and opening the airflow channel. The airflow after being opened converges through the gathering groove 201, and then enters the cavity 103 in the inflation head 100 through the docking hole 202 and the air outlet 104. Gas continues to accumulate in the cavity 103, and the air pressure gradually increases. When the air pressure in the cavity overcomes the elastic force of the elastic element 307, the air pressure pushes the sealing head 300 to move axially along the connecting rod 305, simultaneously stretching the elastic element 307. The sealing head 300 gradually moves out from the air outlet 102, the air outlet 102 opens, and the carbon dioxide gas in the cavity 103 is discharged into the reaction vessel 500 through the air outlet 102.

[0068] When the external air source stops supplying air, the air pressure in the air inlet 101 drops rapidly. At this time, the elasticity of the buffer 203 is released quickly, pushing the pressure regulating seat 200 to reset along the axial direction of the air inlet 101, and simultaneously stretching the buffer 203. As the pressure regulating seat 200 resets, the docking hole 202 and the air outlet 104 gradually misalign and disconnect, cutting off the airflow supply from the air inlet end, and no new gas enters the cavity 103.

[0069] Because the stiffness of the elastic element 307 is less than that of the buffer element 203, its reset force response is slower than that of the pressure regulating seat 200. At this time, the sealing head 300 has not been fully reset, and the vent 102 is still in a semi-open state. The gas remaining in the cavity 103 is naturally discharged through the semi-open vent 102, and the gas pressure in the cavity gradually drops to close to the pressure in the reaction vessel 500, so as to avoid the residual gas pressure in the cavity from hindering the sealing of the sealing head 300. When the pressure in the cavity 103 decreases, the reset force of the elastic element 307 is greater than the gas pressure in the cavity, driving the sealing head 300 to reset in the opposite direction along the connecting rod 305. The sealing head 300 gradually moves closer to the vent 102 and finally fits tightly against the inner wall of the vent 102, sealing the vent 102 and blocking the backflow path of the gelatinous slurry in the reaction vessel 500 from the vent end.

[0070] During the resetting process of the plugging head 300, when the plugging head 300 moves along the connecting rod 305, the rotating rod 301 cooperates with the connecting rod 305 through the groove 303, and the axial movement is converted into the rotational motion of the rotating rod 301. At least two plate-shaped or sheet-shaped cleaning parts 302 rotate with the rotating rod 301, forming a circumferential scraping on the inner wall of the air outlet 102. At the same time, as the plugging head 300 moves axially, it covers different depths of the air outlet 102, peeling off the residual slurry attached to the inner wall, and realizing three-dimensional cleaning in both axial and circumferential directions.

[0071] If a spiral blade-shaped cleaning component 302 is used, when the cleaning component 302 rotates with the rotating rod 301, it can further transport the residual slurry around the air outlet 102 to an area away from the air outlet 102, preventing the slurry from being carried into the air outlet 102 when the sealing head 300 is reset. When the sealing head 300 completely seals the air outlet 102, the pressure regulating seat 200 has cut off the air inlet channel in advance, forming double protection and completely blocking the possibility of slurry backflow into the air inlet channel or even the air source port.

[0072] In summary, compared with existing technologies, it has the following beneficial effects:

[0073] The plug head 300 effectively prevents the slurry in the reaction vessel 500 from flowing back to the air outlet 102 and the air inlet channel after the gas supply stops. After the gas source stops supplying gas, the buffer 203, which has a stiffness greater than that of the elastic element 307, drives the pressure regulating seat 200 to reset first, so that the docking hole 202 and the air outlet 104 are quickly misaligned and disconnected, cutting off the air supply from the air inlet end. The double protection of the plug head 300 and the regulating seat prevents the slurry from breaking through the air inlet channel and flowing back to the vicinity of the gas source.

[0074] Through the spiral transmission structure of the rotating rod 301 and the connecting rod 305, the cleaning component 302 rotates synchronously during the opening and resetting of the sealing head 300, forming a three-dimensional cleaning action. For plate-shaped or sheet-shaped cleaning components 302, residual slurry on the inner wall of the air outlet 102 can be scraped off. For spiral blade-shaped cleaning components 302, the axial force generated during its rotation can actively transport the slurry around the air outlet 102 away from the air outlet 102, thus cleaning the residue on the inner wall and discharging the surrounding slurry in advance, preventing slurry from being brought in when the sealing head 300 is reset.

[0075] Therefore, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the foregoing disclosure, and it should be understood that in some cases, certain features of the invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the following claims and / or the specific embodiments disclosed as the best mode for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the invention will be defined only by the appended claims.

Claims

1. An inflation adjustment mechanism, comprising an inflation head, the inflation head having an air inlet and an air outlet, characterized in that, Also includes: A cavity is located inside the inflation head body, and the air outlet is connected to the air inlet through the cavity; A plug is movably installed inside the air outlet to block or open the air outlet. An elastic element connects the sealing head to the inner wall of the cavity; When gas enters the cavity through the air inlet, the sealing head is driven by the air pressure to stretch the elastic element and move out of the air outlet. The gas is discharged from the air outlet from the inflation head. When the sealing head is reset under the action of the elastic element, the sealing head blocks the air outlet to block the airflow. Also includes: Several air outlets are provided on the inner wall of the air inlet, and the air inlet is connected to the cavity through the air outlets; The pressure regulating seat is movably installed in the air inlet; A buffer component, connected between the pressure regulating seat and the inner wall of the air inlet, is used to provide a restoring force for the pressure regulating seat; The pressure regulating seat has a collection groove on one side, and a docking hole is provided on the side wall of the collection groove; When the pressure regulating seat is driven by air pressure to compress the buffer and move, the docking hole connects with the air outlet to guide the airflow. When the pressure regulating seat is reset under the action of the buffer, the docking hole and the air outlet are misaligned and disconnected to block the airflow. The stiffness of the buffer element is greater than that of the elastic element.

2. The inflation adjustment mechanism according to claim 1, characterized in that, The sealing head includes: A connecting rod is installed at one end on the inner wall of the cavity, the sealing head is sleeved on the other end of the connecting rod, and the elastic element is installed between the connecting rod and the sealing head.

3. The inflation adjustment mechanism according to claim 2, characterized in that, The sealing head also includes: A rotating rod is rotatably mounted on a sealing head at one end and has a groove at the other end. A connecting rod is placed inside the groove, and an elastic element is installed between the inner wall of the groove and the connecting rod. The cleaning component, installed on the outer periphery of the rotating rod, is used to clean the residue on the inner wall of the vent as the sealing head moves.

4. The inflation adjustment mechanism according to claim 3, characterized in that, A transmission structure is provided between the rotating rod and the connecting rod, and the rotating rod is driven to rotate through the transmission structure when the sealing head moves linearly.

5. The inflation adjustment mechanism according to claim 4, characterized in that, The transmission structure includes a groove formed on the surface of the connecting rod, and a slider fixed to the inner wall of the groove and cooperating with the groove. The groove is spiral-shaped, and when the slider moves along the groove, the rotating rod rotates on the sealing head.

6. The inflation adjustment mechanism according to claim 3, characterized in that, The cleaning component is in the form of a plate or sheet, and the number of cleaning components is at least two.

7. The inflation adjustment mechanism according to claim 3, characterized in that, The cleaning component is in the shape of a spiral blade.

8. A colloidal precipitated calcium carbonate production apparatus, comprising a reaction vessel and a flow meter, characterized in that, It also includes the inflation regulating mechanism as described in any one of claims 1-7, wherein the outlet of the inflation regulating mechanism is located inside the reaction vessel, and the flow meter is installed at the inlet of the inflation regulating mechanism.

Images