Raw material mixing device for magnesium oxide rod production
By combining airflow redirection and a composite stirring mechanism, the problems of powder floating and uneven mixing in magnesium oxide rod production were solved, achieving uniform powder dispersion and simplifying anti-backflow measures, thus improving mixing quality and equipment safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING SIDATE MAGNESIUM IND CO LTD
- Filing Date
- 2026-03-04
- Publication Date
- 2026-04-10
AI Technical Summary
In the existing magnesium oxide rod production process, the powder raw materials are prone to floating and dust generation, resulting in uneven mixing. Furthermore, the anti-backflow structure is complex, increasing equipment costs.
It employs an airflow redirection mechanism, a compound stirring mechanism, and a pressurization mechanism to pneumatically convey powder, combined with a mixing method using an auger and stirring blocks. The airflow redirection mechanism prevents backflow, thus achieving uniform powder dispersion and quantitative delivery.
It enables smooth and uniform feeding of powder raw materials, improves mixing quality, simplifies the anti-backflow structure, and reduces equipment complexity and maintenance costs.
Smart Images
Figure CN224100551U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to material mixing equipment technical field, concretely is a magnesium oxide rod production raw material mixing device. BACKGROUND
[0002] As an important refractory material and electrical insulation material, the performance of magnesium oxide rod depends on the uniformity of raw material mixing in the production process. The raw material usually contains powdered magnesium oxide and other solid additives, as well as liquid binder.
[0003] Currently, the traditional mixing process mostly uses mechanical stirring device to stir and mix the solid powder and liquid in the stirring tank in turn or simultaneously. However, in the actual production process, when adding light powder raw material into the stirring tank, the powder is easy to float, dust, or accumulate and stick near the feeding port, which leads to poor discharge and affects the accuracy and continuity of feeding. Secondly, simple mechanical stirring has limited effect on quickly and uniformly dispersing light powder into liquid, which easily causes powder agglomeration and uneven dispersion, affecting the quality of the final mixed slurry. In addition, to prevent the backflow of liquid raw material during mixing or temporary shutdown of the equipment through the feeding pipeline, a complex valve system is often required, which increases the complexity and maintenance cost of the equipment.
[0004] Therefore, there is an urgent need for a magnesium oxide rod production raw material mixing device that can smoothly and quantitatively feed powder raw material, effectively improve the uniformity of powder-liquid mixing, and have a simple and efficient anti-backflow function. SUMMARY
[0005] The purpose of the utility model is to provide a magnesium oxide rod production raw material mixing device that has the advantages of smooth feeding, high mixing uniformity, and simple and efficient anti-backflow function, solving the problems in the prior art.
[0006] To achieve the above purpose, the utility model provides the following technical scheme:
[0007] A magnesium oxide rod production raw material mixing device, comprising a control box, a fixed box fixed to one side of the control box, two fixed frames fixed to the inner wall of the fixed box, a stirring tank fixed to the inner wall of the two fixed frames, a stirring mechanism arranged on the stirring tank, a discharging mechanism arranged at the lower end of the stirring tank, a gas feeding mechanism fixed in the control box, a hollow box arranged on the gas outlet end of the gas feeding mechanism, a feeding mechanism fixed to the upper end of the hollow box, a lower horizontal pipe and an upper horizontal pipe fixed to the hollow box near the stirring tank in a penetrating manner, an airflow redirection mechanism arranged in the upper horizontal pipe, and a booster mechanism arranged on the hollow box.
[0008] The upper horizontal pipe is located above the lower horizontal pipe, and a communication pipe is fixed between the upper horizontal pipe and the lower horizontal pipe. The communication pipe is used to communicate the middle positions of the lower horizontal pipe and the upper horizontal pipe with each other.
[0009] The airflow redirection mechanism comprises a fixed ring fixed to the inner wall of the upper horizontal pipe, a spring fixed to the fixed ring near one end of the hollow box, a movable ring fixed to the spring near one end of the hollow box, and a sealing ball fixed to the inner wall of the movable ring, the outer peripheral wall of the movable ring and the inner wall of the upper horizontal pipe are in close contact;
[0010] The airflow redirection mechanism is located directly above the communication pipe, and when the airflow enters the upper horizontal pipe, the air pressure will compress the spring towards the direction close to the stirring tank, at this time the sealing ball will move to the upper side of the communication pipe, so that the airflow entering the upper horizontal pipe flows into the inside of the lower horizontal pipe through the communication pipe, the third valve body is located between the communication pipe and the hollow box.
[0011] It is worth noting that in the normal powder feeding state, the airflow pressure pushes the sealing ball to move against the spring force, opens the path to the stirring tank, and at the same time closes the port above the communication pipe, the airflow mainly carries the powder out of the end of the upper horizontal pipe, when the third valve body is closed and the liquid level in the tank is high, if the air pressure increases, the mechanism can be self-adapted: the air pressure further compresses the spring, so that the sealing ball completely moves to the upper side of the communication pipe, forcing most of the airflow to turn through the communication pipe into the lower horizontal pipe, blowing out from the lower part of the tank body, which not only can disturb the liquid at the bottom of the tank to promote mixing, but more importantly, by maintaining the positive airflow pressure in the upper and lower horizontal pipes, an effective "air seal" is formed, which can reliably prevent the liquid in the stirring tank from flowing back to the hollow box through the pipeline due to siphon or pressure difference, protecting the air path and the feeding mechanism, greatly improving the safety and reliability of the equipment operation.
[0012] Preferably, the stirring mechanism comprises a first motor fixed to the upper end of the stirring tank, a stirring column fixed to the lower end of the output shaft of the first motor, a plurality of stirring blocks fixed to the outer peripheral wall of the stirring column, and an auger fixed to the lower part of the outer peripheral wall of the stirring column.
[0013] It is worth noting that the plurality of stirring blocks arranged on the stirring column can form a strong turbulent flow zone in the middle and upper parts of the tank, which can efficiently shear and diffuse the preliminarily mixed slurry, effectively breaking the powder agglomeration.
[0014] Preferably, the lower end of the auger is less than one centimeter away from the inner wall bottom surface of the stirring tank, and the upper end of the stirring tank is fixed with a fixed pipe in a through manner.
[0015] It is worth noting that the design of the auger structure located in the lower part, with its lower end being less than one centimeter away from the tank bottom, can rotate closely to the tank bottom, generating strong axial thrust and wall scraping effect, which not only can strongly transport the heavier slurry or particles deposited on the tank bottom upwards, preventing the formation of mixing dead zones, but also can avoid material agglomeration on the tank bottom, ensuring uniform composition of the material in the tank, significantly improving the mixing uniformity and efficiency of magnesium oxide powder and liquid binder.
[0016] Preferably, the feeding mechanism comprises a discharge pipe fixed through the lower end of the stirring tank and a first valve body arranged on the discharge pipe.
[0017] It is worth noting that the discharge pipe is directly communicated with the lowest point of the bottom of the stirring tank, ensuring that the mixed slurry can be completely emptied under the action of gravity without residue. The first valve body (usually a butterfly valve or a ball valve) can realize rapid and reliable opening and closing of the discharge port, accurately control the discharging process, and meet the needs of batch production.
[0018] Preferably, the gas feeding mechanism comprises a bearing plate fixed to the inner wall of the control box, a gas pump fixed to the upper end of the bearing plate, a gas conveying pipe fixed to the gas outlet end of the gas pump, a gas conveying cylinder fixed to the upper end of the gas outlet end of the gas conveying pipe, and a gas feeding elbow fixed to the upper end of the gas conveying cylinder. The gas outlet end of the gas feeding elbow is fixed through the side wall of the hollow box.
[0019] It is worth noting that the gas pump is used as a power source and is stably installed in the control box through the bearing plate, realizing the integration and noise reduction of the power unit. The connection of the gas conveying pipe and the gas conveying cylinder forms a stable gas flow channel. In particular, the design of the gas feeding elbow smoothly converts the horizontal gas flow into upward conveying to the hollow box, reducing the gas flow resistance and energy loss, and ensuring the effective transmission of gas flow pressure.
[0020] Preferably, the feeding mechanism comprises a first feeding pipe fixed through the upper end of the hollow box, a second valve body arranged on the first feeding pipe, and a feeding cylinder fixed to the upper end of the first feeding pipe.
[0021] It is worth noting that the feeding cylinder serves as a storage hopper, which can temporarily store a certain amount of magnesium oxide and other powder raw materials for batch addition. The first feeding pipe serves as a connection channel, and the second valve body thereon can accurately control the flow and timing of powder falling, realizing intermittent or uniform feeding, avoiding the sudden influx of powder into the mixing tank causing dust or uneven mixing. In addition, when the gas feeding mechanism is not started or the gas pressure is insufficient, the valve can be closed to effectively prevent the liquid vapor in the stirring tank or the possible backflow of slurry from flowing back into the feeding cylinder through the pipeline, polluting the raw materials or causing blockage.
[0022] Preferably, the pressure boosting mechanism comprises a second motor fixed to the hollow box near the stirring tank, a rotating drum fixed to the outer peripheral wall of the output shaft of the second motor, and a plurality of fan plates fixed to the outer peripheral wall of the rotating drum. The rotating drum and the fan plates are located in the middle region of the interior of the hollow box, and the second motor is located between the upper horizontal pipe and the lower horizontal pipe.
[0023] It is worth noting that the second motor drives the rotating drum and the circumferentially distributed fan plates to rotate at high speed in the central region of the hollow box, the rotating drum and the feed pipe mechanically disperse the powder falling from the upper part, can effectively break the powder aggregation, so that it is more easily entrained by the airflow, the local vortex formed by the rotating body makes the airflow field in the hollow box more turbulent, and the mixing of air and powder is more sufficient, preventing the powder from settling or accumulating at the bottom of the hollow box, the dynamic disturbance ensures that the powder can continuously and uniformly enter the horizontal pipe inlet connected to the stirring tank, avoiding the intermittent discharge phenomenon that may occur in the static or laminar airflow, so that more stable and uniform powder supply to the stirring tank is realized, and the mixing quality of the final product is further improved.
[0024] Preferably, a collection box is arranged on the bottom surface of the inner wall of the fixed box, a groove is formed through the end of the control box close to the fixed box, a support is fixedly connected to the inner wall of the control box, and the end of the support close to the stirring tank is fixedly connected to the side wall of the hollow box.
[0025] It is worth noting that the collection box placed at the bottom of the fixed box can be used to receive a small amount of material that may fall or be spilled during cleaning of the stirring tank, keep the production environment clean, and facilitate recycling, the groove formed on the control box provides a regular wiring channel for the cables and pipelines of the electrical elements (such as motors and air pump controllers) in the control box, avoiding pipeline disorder, improving safety and aesthetics, and the support firmly connects the side wall of the hollow box to the inner wall of the control box, providing firm auxiliary support for the hollow box, the feeding mechanism and the pressure increasing mechanism that are suspended.
[0026] Compared with the prior art, the utility model has the advantages of the following:
[0027] 1、The utility model discloses a powder feeding system is formed by the air pump, hollow box, upper / lower horizontal pipe and feeding mechanism, utilizes the continuous airflow as the transport medium, when using, opens the second valve body on the air pump and feeding mechanism, and the powder falls into the hollow box under the action of gravity, is immediately entrained by the horizontal airflow, and is directly blown into the liquid surface below the stirring tank through the upper horizontal pipe, and this pneumatic conveying mode fundamentally avoids the problems of powder floating, dust raising or accumulation and adhesion at the feeding port, realizes closed, smooth, continuous and quantitatively controlled feeding of powder raw materials, and remarkably improves the accuracy of feeding and the cleanliness of the working environment.
[0028] 2. The utility model discloses a composite stirring mechanism comprising an auger and a stirring block, and combines a booster mechanism in the hollow box to realize multi-stage mixing and intensification. Specifically, after the second motor drives the rotary drum to scatter the powder lumps, the airflow uniformly blows the powder lumps into the tank. At the same time, the first motor drives the stirring column to rotate, the stirring block at the upper part generates intense shear turbulence, and the auger close to the bottom of the tank forcibly lifts the possible deposited materials to form strong axial and radial circulation, which can quickly and completely disperse the light magnesium oxide powder in the liquid, effectively solves the technical problems of powder lumping and uneven dispersion in the traditional simple mechanical stirring, and greatly improves the uniformity and quality stability of the mixed slurry.
[0029] 3. The utility model discloses a airflow redirection mechanism composed of a spring, a movable ring and a sealing ball arranged in the upper horizontal pipe, which cooperates with the third valve body on the lower horizontal pipe and the communication pipe to form a self-adaptive anti-backflow mechanism. When the third valve body is closed and the liquid level in the tank is high, the mechanism mainly designs to prevent backflow of the liquid generated by stirring. The system air pressure will push the sealing ball to move, change the main flow channel, and make the airflow blow out from the upper and lower horizontal pipes at the same time. The design cleverly utilizes the airflow of the equipment itself to dynamically form an "airtight" barrier without additional complex liquid seal or electromagnetic valve system, which can reliably prevent the liquid or slurry in the stirring tank from flowing backward into the hollow box and the feeding mechanism under shutdown or abnormal conditions. The mechanism is simple in structure, automatic in response, safe and effective, and reduces the complexity and maintenance cost of the equipment. BRIEF DESCRIPTION OF DRAWINGS
[0030] Figure 1 The utility model discloses a three-dimensional structure schematic view of the utility model is exhibited.
[0031] Figure 2 The utility model discloses a three-dimensional structure schematic view of the utility model is exhibited.
[0032] Figure 3 The utility model discloses a three-dimensional structure schematic view of the utility model is exhibited.
[0033] Figure 4 The utility model discloses a three-dimensional structure schematic view of the utility model is exhibited.
[0034] Figure 5 The utility model discloses a three-dimensional structure schematic view of the utility model is exhibited.
[0035] Reference signs: 1, control box; 2, fixed box; 3, fixed frame; 4, stirring tank; 5, first motor; 6, collection box; 7, groove body; 8, discharge pipe; 9, first valve body; 10, support; 11, hollow box; 12, first feeding pipe; 13, second valve body; 14, feeding cylinder; 15, bearing plate; 16, air pump; 17, air conveying pipe; 18, air conveying cylinder; 19, air conveying elbow; 20, lower cross pipe; 21, upper cross pipe; 22, fixed ring; 23, spring; 24, movable ring; 25, sealing ball; 26, communication pipe; 27, third valve body; 28, second motor; 29, rotating cylinder; 30, fan plate; 31, fixed pipe; 32, stirring column; 33, stirring block; 34, auger. DETAILED DESCRIPTION
[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0037] In order to solve the problems of easy dust raising, accumulation, uneven mechanical stirring and mixing, and complex anti-liquid backflow structure when powder raw materials are fed in the prior art, the following technical solutions are given. Please refer to Figures 1-5 ;
[0038] Embodiment 1: A magnesium oxide rod production raw material mixing device, comprising a control box 1, a fixed box 2 fixed to one side of the control box 1, two fixed frames 3 fixed to the inner walls of the fixed box 2, a stirring tank 4 fixed to the inner walls of the two fixed frames 3, a stirring mechanism arranged on the stirring tank 4, a discharging mechanism arranged at the lower end of the stirring tank 4, a gas feeding mechanism fixed in the control box 1, a hollow box 11 fixed to the upper end of the gas feeding mechanism, a feeding mechanism fixed to the upper end of the hollow box 11, a lower cross pipe 20 and an upper cross pipe 21 fixed to the hollow box 11 near the stirring tank 4 in a penetrating manner, an airflow redirection mechanism arranged in the upper cross pipe 21, and a pressure increasing mechanism arranged on the hollow box 11.
[0039] The upper cross pipe 21 is located above the lower cross pipe 20, and a communication pipe 26 is fixed between the upper cross pipe 21 and the lower cross pipe 20, which is used to communicate the middle positions of the lower cross pipe 20 and the upper cross pipe 21 with each other.
[0040] The airflow redirection mechanism comprises a fixed ring 22 fixed to the inner wall of the upper cross pipe 21, a spring 23 fixed to the end of the fixed ring 22 close to the hollow box 11, a movable ring 24 fixed to the end of the spring 23 close to the hollow box 11, and a sealing ball 25 fixed to the inner wall of the movable ring 24, and the outer peripheral wall of the movable ring 24 and the inner wall of the upper cross pipe 21 are in close contact.
[0041] The air flow redirection mechanism is located directly above the communication pipe 26, and when the air flow enters the upper horizontal pipe 21, the air pressure will compress the spring 23 towards the direction of the stirring tank 4, at this time the sealing ball 25 will move to the upper side of the communication pipe 26, so that the air flow entering the upper horizontal pipe 21 flows into the inside of the lower horizontal pipe 20 through the communication pipe 26, and the third valve body 27 is located between the communication pipe 26 and the hollow box 11.
[0042] In use, liquid is poured into the fixed pipe 31, and powder and other solids are poured into the feeding mechanism, the air feeding mechanism is turned on to blow air into the hollow box 11, the wind force enters the stirring tank 4 through the lower horizontal pipe 20 and the upper horizontal pipe 21, the feeding mechanism is opened to pour the material, the powder is carried into the inside of the stirring tank 4 by the wind force, and then the stirring mechanism on the stirring tank 4 is turned on to mix the material, which can improve the mixing effect. In addition, when the third valve body 27 is closed, the air flow can flow into the inside of the lower horizontal pipe 20 through the upper horizontal pipe 21 and the communication pipe 26, and then flow into the stirring tank 4, at this time, part of the air flow will also flow into the stirring tank 4 through the fixed ring 22 in the upper horizontal pipe 21, and in addition, closing the third valve body 27 also has the benefit of preventing the liquid in the stirring tank 4 from flowing into the hollow box 11 when the liquid level is too high.
[0043] In this embodiment, specifically: the stirring mechanism includes a first motor 5 fixed to the upper end of the stirring tank 4, a stirring column 32 fixed to the lower end of the output shaft of the first motor 5, a plurality of stirring blocks 33 fixed to the outer peripheral wall of the stirring column 32, and an auger 34 fixed to the lower part of the outer peripheral wall of the stirring column 32.
[0044] In this embodiment, specifically: the lower end of the auger 34 is less than one centimeter away from the inner wall bottom surface of the stirring tank 4, and the upper end of the stirring tank 4 is fixedly connected through the fixed pipe 31.
[0045] In this embodiment, specifically: the feeding mechanism includes a discharge pipe 8 fixedly connected through the lower end of the stirring tank 4, and a first valve body 9 arranged on the discharge pipe 8.
[0046] In this embodiment, specifically: the air feeding mechanism includes a bearing plate 15 fixed to the inner wall of the control box 1, a gas pump 16 fixed to the upper end of the bearing plate 15, a gas conveying pipe 17 fixed to the gas outlet end of the gas pump 16, a gas conveying cylinder 18 fixed to the upper end of the gas outlet end of the gas conveying pipe 17, and a gas feeding elbow 19 fixed to the upper end of the gas conveying cylinder 18. The gas outlet end of the gas feeding elbow 19 is fixedly connected through the side wall of the hollow box 11.
[0047] In this embodiment, specifically: the feeding mechanism includes a first feeding pipe 12 fixedly connected through the upper end of the hollow box 11, a second valve body 13 arranged on the first feeding pipe 12, and a feeding cylinder 14 fixed to the upper end of the first feeding pipe 12.
[0048] In this embodiment, specifically: the fixed box 2 inner wall bottom is placed with a collection box 6, the control box 1 near the fixed box 2 one end is provided with a groove 7, the control box 1 inner wall is fixedly connected with a support 10, the support 10 near the stirring tank 4 one end and the hollow box 11 side wall are mutually fixedly connected.
[0049] In this embodiment, specifically: the fixed box 2 inner wall bottom is placed with a collection box 6, the control box 1 near the fixed box 2 one end is provided with a groove 7, the control box 1 inner wall is fixedly connected with a support 10, the support 10 near the stirring tank 4 one end and the hollow box 11 side wall are mutually fixedly connected.
[0050] Working principle: when working, first open the air feeding mechanism, the air pump 16 starts, the generated air flow passes through the air conveying pipe 17, the air conveying cylinder 18 and the air feeding elbow 19 into the hollow box 11 inside in turn, then the operator injects the required amount of liquid binder into the stirring tank 4 through the fixed pipe 31;
[0051] In the case of conventional liquid level is not high, no risk of backflow, keep the third valve body 27 on the lower horizontal pipe 20 in the open state, at this time open the second valve body 13 on the feeding mechanism, the magnesium oxide powder stored in the feeding cylinder 14 falls into the hollow box 11 through the first feeding pipe 12;
[0052] If the booster mechanism is enabled, the second motor 28 will drive the rotating drum 29 and the fan plates 30 thereon to rotate at high speed, dispersing and pre-mixing the falling powder, and the powder-carrying air flow is blown directly into the stirring tank 4 through the open third valve body 27 and the lower horizontal pipe 20;
[0053] Then, the stirring mechanism is started, the first motor 5 drives the stirring column 32 to rotate, and the stirring block 33 on the stirring column 32 cooperates with the lower auger 34 to efficiently mix the materials in the tank.
[0054] When the liquid level in the stirring tank 4 is high, and there is a risk of liquid backflow during stirring, the third valve body 27 needs to be actively closed. At this time, the air pressure in the hollow box 11 rises, and the air pressure acts on the airflow redirection mechanism in the upper horizontal pipe 21, pushing the movable ring 24 and the sealing ball 25 to move against the elastic force of the spring 23 in the direction of the stirring tank 4. The sealing ball 25 moves to the upper part of the communication pipe 26, thereby blocking the main passage of the upper horizontal pipe 21, and the airflow path is changed: the airflow entering the upper horizontal pipe 21 cannot directly go forward, but is forced to turn downward through the communication pipe 26, flows into the lower horizontal pipe 20, and finally blows into the bottom of the stirring tank 4 from the outlet of the lower horizontal pipe 20;
[0055] At the same time, a small amount of airflow still flows out from the end of the upper horizontal pipe 21 through the gap between the fixed ring 22 and the sealing ball 25. The two continuous forward airflows form a stable air pressure barrier higher than the static pressure of the liquid column in the tank inside the pipeline, that is, an "air seal", thereby reliably preventing liquid or slurry from flowing backward into the hollow box 11 and the feeding mechanism during stirring or shutdown;
[0056] After the mixing is completed, the first valve body 9 on the discharge pipe 8 is opened, and the uniformly mixed slurry is discharged under the action of gravity, and the residual material that may drop is received by the collection box 6 below, thereby completing the entire working cycle. It should be noted that the relationship terms such as first and second in the present text are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or sequence between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.
[0057] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application.
Claims
1. A raw material mixing device for a magnesium oxide rod production, characterized by: It include control box (1), fixed box (2) fixed to one side of control box (1), two fixed frame (3) fixed to the inner wall of fixed box (2), stirring tank (4) fixed to the inner wall of two fixed frame (3), setting on stirring tank (4) stirring mechanism, setting on the lower end of stirring tank (4) discharging mechanism, fixed to the inside of control box (1) gas feeding mechanism, hollow box (11) setting on the gas outlet end of gas feeding mechanism, fixed to the upper end of hollow box (11) feeding mechanism, through type fixed to the end of hollow box (11) close to stirring tank (4) lower horizontal pipe (20) and upper horizontal pipe (21), gas flow direction changing mechanism setting in upper horizontal pipe (21) and pressure increasing mechanism setting on hollow box (11); Upper horizontal pipe (21) is located above lower horizontal pipe (20), and communication pipe (26) is fixed between upper horizontal pipe (21) and lower horizontal pipe (20), which is used for connecting the middle positions of lower horizontal pipe (20) and upper horizontal pipe (21) with each other; Gas flow direction changing mechanism includes fixed ring (22) fixed to the inner wall of upper horizontal pipe (21), spring (23) fixed to the end of fixed ring (22) close to hollow box (11), movable ring (24) fixed to the end of spring (23) close to hollow box (11) and sealing ball (25) fixed to the inner wall of movable ring (24), the outer peripheral wall of movable ring (24) and the inner wall of upper horizontal pipe (21) are attached; Gas flow direction changing mechanism is located directly above communication pipe (26), and when gas flow enters into upper horizontal pipe (21), air pressure will compress spring (23) to the direction close to stirring tank (4), at this time, sealing ball (25) will move to the upper side of communication pipe (26), so that the gas flow entering into upper horizontal pipe (21) flows into the inside of lower horizontal pipe (20) through communication pipe (26), and third valve body (27) is arranged on lower horizontal pipe (20), which is located between communication pipe (26) and hollow box (11).
2. The raw material mixing device for producing a magnesium oxide rod according to claim 1, characterized by: Stirring mechanism includes first motor (5) fixed to the upper end of stirring tank (4), stirring column (32) fixed to the lower end of output shaft of first motor (5), a plurality of stirring blocks (33) fixed to the outer peripheral wall of stirring column (32) and auger (34) fixed to the lower part of outer peripheral wall of stirring column (32).
3. The raw material mixing device for producing a magnesium oxide rod according to claim 2, characterized by: The lower end of auger (34) is less than one centimeter away from the bottom surface of the inner wall of stirring tank (4), and the upper end of stirring tank (4) is through type fixed with fixed pipe (31).
4. The raw material mixing device for producing a magnesium oxide rod according to claim 1, characterized by: Discharging mechanism includes discharge pipe (8) through type fixed to the lower end of stirring tank (4) and first valve body (9) arranged on discharge pipe (8).
5. The raw material mixing device for producing a magnesium oxide rod according to claim 1, characterized in that: Gas feeding mechanism includes bearing plate (15) fixed to the inner wall of control box (1), gas pump (16) fixed to the upper end of bearing plate (15), gas conveying pipe (17) fixed to the gas outlet end of gas pump (16), gas conveying cylinder (18) fixed to the upper end of gas outlet end of gas conveying pipe (17) and gas feeding elbow (19) fixed to the upper end of gas conveying cylinder (18), and the gas outlet end of gas feeding elbow (19) is through type fixed to the side wall of hollow box (11).
6. The raw material mixing device for producing a magnesium oxide rod according to claim 1, characterized by: The feeding mechanism comprises a first feeding pipe (12) fixedly connected to the upper end of the hollow box (11), a second valve body (13) arranged on the first feeding pipe (12), and a feeding cylinder (14) fixedly connected to the upper end of the first feeding pipe (12).
7. The raw material mixing device for producing a magnesium oxide rod according to claim 1, characterized by: The pressurizing mechanism comprises a second motor (28) fixedly connected to the hollow box (11) near one end of the stirring tank (4), a rotating drum (29) fixedly connected to the outer peripheral wall of the output shaft of the second motor (28), and a plurality of fan plates (30) fixedly connected to the outer peripheral wall of the rotating drum (29), wherein the rotating drum (29) and the fan plates (30) are located in the middle region of the interior of the hollow box (11), and the second motor (28) is located between the upper horizontal pipe (21) and the lower horizontal pipe (20).
8. The raw material mixing device for producing a magnesium oxide rod according to claim 1, characterized by: The inner wall of the fixed box (2) is provided with a collecting box (6), a slot (7) is formed in the end of the control box (1) close to the fixed box (2), a support (10) is fixedly connected to the inner wall of the control box (1), and the end of the support (10) close to the stirring tank (4) is fixedly connected to the side wall of the hollow box (11).