Automatic alkali preparation device for production of hydroxypropyl methyl cellulose

Abstract

The utility model relates to the technical field of alkali preparation devices, in particular to an automatic alkali preparation device for hydroxypropyl methyl cellulose production, which comprises a bottom plate, a heating furnace fixedly connected to the top end of the bottom plate, a production box fixedly connected to the inner side of the heating furnace, a box cover mounted at the top end of the production box, and a rotating motor fixedly connected to the middle of the top end of the box cover. The bottom end of the rotating motor is fixedly connected with a stirring paddle which is vertically arranged and is positioned on the inner side of the production box. The production box, the box cover, the rotating motor, the stirring paddle, the bottom detection pipe, the connecting pipe, the flow pump, the three-way valve, the alkali liquor tank, the threaded cylinder, the threaded cover, the air inlet pipe and the air pump are arranged; when alkali liquor needs to be injected, the flow pump is started to introduce certain alkali liquor into the production box, then the three-way valve is adjusted to enable the air inlet pipe and the connecting pipe to be communicated with each other, the air pump is started, the air pump can introduce air into the connecting pipe and the inner side of the bottom detection pipe to introduce residual alkali liquor into the inner side of the production box, and the alkali adding amount error is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of alkali preparation devices, in particular to an automatic alkali preparation device for producing hydroxypropyl methylcellulose. Background Art

[0002] Hydroxypropyl methylcellulose, also known as hydroxypropyl methylcellulose, is a type of non-ionic cellulose mixed ether. It is a semi-synthetic, inactive, viscoelastic polymer. It is often used as a lubricant in ophthalmology, or as an excipient or excipient in oral medications. In industrial production, alkali solution is required for the production of hydroxypropyl methylcellulose. The alkali preparation device is a device used to store and mix alkaline solutions. It is usually made of stainless steel or other corrosion-resistant materials. The concentration of the alkaline solution can be adjusted as needed. When using the alkali preparation tank, it is necessary to add an appropriate amount of alkaline substances such as sodium hydroxide, potassium hydroxide, etc. according to specific requirements, and the solution must be fully mixed through stirring, circulation, etc. to achieve the desired effect.

[0003] The existing alkali preparation device is widely used, but when alkali is added to the production box, alkali solution will remain inside the connecting pipe, resulting in an error in the actual amount of alkali added. In addition, the addition of alkali will cause the pressure inside the device to increase, and the gas discharge inside the device will pollute the environment and affect the health of the operator. Therefore, in order to solve the above problems, an automatic alkali preparation device for hydroxypropyl methylcellulose production is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic alkali preparation device for the production of hydroxypropyl methylcellulose, so as to solve the problems raised in the above background technology that alkali solution will remain inside the connecting pipe when adding alkali and the gas discharge inside the device will pollute the environment.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An automatic alkali preparation device for the production of hydroxypropyl methylcellulose, comprising a bottom plate, a heating furnace fixedly connected to the top of the bottom plate, a production box fixedly connected to the inside of the heating furnace, a box cover installed on the top of the production box, a rotating motor fixedly connected to the middle of the top of the box cover, a stirring paddle fixedly connected to the bottom of the rotating motor and located inside the production box, a vertically arranged bottom tube fixedly connected to the bottom of the box cover, a connecting pipe connected to the bottom tube at the top of the bottom tube, and a fixed end of the connecting pipe away from the bottom tube. It is connected to a flow pump that passes through a connecting pipe, and the side of the flow pump away from the connecting pipe is fixedly connected to a three-way valve that passes through the flow pump, the bottom end of the three-way valve is fixedly connected to an alkali liquid tank, the top of the alkali liquid tank is fixedly connected to a threaded barrel that passes through the alkali liquid tank, a threaded cover is spirally connected to the outer side of the threaded barrel, one side of the three-way valve is fixedly connected to an air intake pipe that passes through the three-way valve, the end of the air intake pipe away from the three-way valve is fixedly connected to an air pump that passes through the air intake valve, and one side of the rotating motor is provided with an exhaust assembly installed on the top of the box cover.

[0007] Preferably, the output shaft of the rotating motor passes through the box cover and is rotatably connected to the box cover, the connection between the connecting pipe and the box cover is a spiral connection, the flow pump is fixedly connected to the top of the alkali liquid tank, the inner bottom end of the alkali liquid tank and the three-way valve are interconnected, and the air pump is fixedly connected to the top of the bottom plate.

[0008] Preferably, the exhaust assembly includes an exhaust solenoid valve fixedly connected to the top of the box cover and communicating with the inner side of the production box, the top of the exhaust solenoid valve is fixedly connected to an exhaust pipe communicating with the exhaust solenoid valve, the end of the exhaust pipe away from the exhaust solenoid valve is fixedly connected to a purification tank communicating with the exhaust pipe, an activated carbon block is provided on the inside of the purification tank, calcium hydroxide particles are fixedly connected to the inside of the activated carbon block, the top of the purification tank is spirally connected to the tank cover, an air hole is provided inside the tank cover that passes through the tank cover from top to bottom, and a storage rack is fixedly connected to the outside of the purification tank.

[0009] Preferably, the outer side of the activated carbon block is tightly fitted to the inner side of the purification tank, the number of the calcium hydroxide particles is multiple, and the calcium hydroxide particles are evenly distributed inside the activated carbon block.

[0010] Preferably, there are a plurality of air holes, and the air holes are evenly distributed inside the tank cover, and the bottom end of the storage rack is fixedly connected to the top end of the tank cover.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. In the utility model, by setting the production box, box cover, rotating motor, stirring paddle, bottom pipe, connecting pipe, flow pump, three-way valve, alkali liquid tank, threaded barrel, threaded cover, air inlet pipe and air pump, when alkali liquid needs to be added, the flow pump is started to introduce a certain amount of alkali liquid into the inside of the production box, and then the three-way valve is adjusted to make the air inlet pipe and the connecting pipe interpenetrate and the air pump is started. The air pump can then introduce gas into the connecting pipe and the bottom pipe so that the residual alkali liquid inside is introduced into the inside of the production box, thereby reducing the error in the amount of alkali added;

[0013] 2. In the utility model, through the provision of an exhaust assembly, an exhaust solenoid valve, an exhaust pipe, a purification tank, an activated carbon block, calcium hydroxide particles, a tank cover, air holes and a storage rack, when alkali is added, the gas enters the inner side of the purification tank through the exhaust pipe, at which time the activated carbon block and calcium hydroxide absorb the acidic gas and some toxic gases, and the purified gas is discharged through the air holes on the tank cover. The provision of the exhaust assembly can not only stabilize the air pressure inside the production box, but also prevent toxic gases from polluting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the installation structure of the box cover of the utility model;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the activated carbon block of the utility model.

[0018] In the figure: 1. Base plate; 2. Heating furnace; 3. Production box; 4. Box cover; 5. Rotating motor; 6. Agitator; 7. Bottom tube; 8. Connecting pipe; 9. Flow pump; 10. Three-way valve; 11. Alkali liquid tank; 12. Threaded barrel; 13. Threaded cover; 14. Inlet pipe; 15. Air pump; 16. Exhaust assembly; 161. Exhaust solenoid valve; 162. Exhaust pipe; 163. Purification tank; 164. Activated carbon block; 165. Calcium hydroxide granules; 166. Tank cover; 167. Air hole; 168. Storage rack. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0021] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0022] See also Figure 1-4 , the utility model provides a technical solution:

[0023] An automatic alkali preparation device for the production of hydroxypropyl methylcellulose, comprising a bottom plate 1, a heating furnace 2 being fixedly connected to the top of the bottom plate 1, a production box 3 being fixedly connected to the inside of the heating furnace 2, a box cover 4 being installed on the top of the production box 3, a rotating motor 5 being fixedly connected to the middle of the top of the box cover 4, a stirring paddle 6 being fixedly connected to the bottom of the rotating motor 5 and being vertically arranged and located inside the production box 3, a bottom of the box cover 4 being fixedly connected to a vertically arranged bottom tube 7, a connecting pipe 8 being provided at the top of the bottom tube 7 and being connected to the connecting pipe 8, and an end of the connecting pipe 8 being away from the bottom tube 7 and being connected to the connecting pipe 8 and being connected to the connecting pipe 8 A flow pump 9 is provided, and a three-way valve 10 communicating with the flow pump 9 is fixedly connected to the side of the flow pump 9 away from the connecting pipe 8. The bottom end of the three-way valve 10 is fixedly connected to an alkali liquid tank 11, and the top of the alkali liquid tank 11 is fixedly connected to a threaded barrel 12 communicating with the alkali liquid tank 11. A threaded cover 13 is spirally connected to the outer side of the threaded barrel 12. One side of the three-way valve 10 is fixedly connected to an air intake pipe 14 communicating with the three-way valve 10, and one end of the air intake pipe 14 away from the three-way valve 10 is fixedly connected to an air pump 15 communicating with the air intake valve. One side of the rotating motor 5 is provided with an exhaust assembly 16 mounted on the top of the box cover 4.

[0024] The output shaft of the rotating motor 5 passes through the box cover 4 and is rotatably connected to the box cover 4. The connection between the connecting pipe 8 and the box cover 4 is a spiral connection. The flow pump 9 is fixedly connected to the top of the alkali liquid tank 11. The inner bottom end of the alkali liquid tank 11 is connected to the three-way valve 10. The air pump 15 is fixedly connected to the top of the bottom plate 1. The air pump 15 inputs air to the air inlet pipe 14 to press the alkali liquid inside the connecting pipe 8 into the inside of the production box 3. The exhaust component 16 includes an exhaust solenoid valve 161 fixedly connected to the top of the box cover 4 and connected to the inside of the production box 3. The top of the exhaust solenoid valve 161 is fixedly connected to an exhaust pipe 162 that is connected to the exhaust solenoid valve 161. The end of the exhaust pipe 162 away from the exhaust solenoid valve 161 is fixedly connected to a purification tank 163 that is connected to the exhaust pipe 162. An activated carbon block 164 is provided inside the purification tank 163. The activated carbon block 164 is solid inside. Calcium hydroxide particles 165 are fixedly connected to it, and a tank cover 166 is spirally connected to the top of the purification tank 163. An air hole 167 is provided inside the tank cover 166, which passes through the tank cover 166 from top to bottom. A storage rack 168 is fixedly connected to the outside of the purification tank 163. The setting of the exhaust component 16 can not only stabilize the air pressure inside the production box 3, but also prevent toxic gases from polluting the environment. The outside of the activated carbon block 164 is tightly fitted with the inside of the purification tank 163. There are multiple calcium hydroxide particles 165, and the calcium hydroxide particles 165 are evenly distributed inside the activated carbon block 164. The setting of multiple calcium hydroxide particles 165 enables the toxic gas to fully contact with the calcium hydroxide particles 165. There are multiple air holes 167, and the air holes 167 are evenly distributed inside the tank cover 166. The bottom end of the storage rack 168 is fixedly connected to the top of the box cover 4.

[0025] Workflow: Before use, power on the equipment and connect the corresponding electrical appliances on the device to the computer or controller. When hydroxypropyl methylcellulose production is required, first unscrew the threaded cover 13 from the outside of the threaded barrel 12, add the alkali solution into the inner side of the alkali solution tank 11 through the threaded barrel 12, turn the three-way valve 10 to make the connecting pipe 8 and the bottom end of the inner side of the alkali solution tank 11 interconnected, open the box cover 4, put the materials required for the production of hydroxypropyl methylcellulose into the inner side of the production box 3 and close the box cover 4, then start the heating furnace 2 and the rotating motor 5 on the top of the bottom plate 1, the heating furnace 2 heats the production box 3, the output shaft of the rotating motor 5 drives the stirring paddle 6 to rotate to continuously stir and mix the materials, start the flow pump 9, the flow pump 9 introduces the alkali solution inside the alkali solution tank 11 into the inner side of the production box 3 through the three-way valve 10, the connecting pipe 8 and the bottom pipe 7. After the introduction is completed, the bottom pipe 7 and the connecting There is still alkali liquid inside the connecting pipe 8, so close the flow pump 9 and adjust the three-way valve 10 to make the air inlet pipe 14 and the connecting pipe 8 interconnected, start the air pump 15, and the air pump 15 introduces the gas into the connecting pipe 8 and the bottom pipe 7 through the air inlet pipe 14, so that the alkali liquid remaining inside the inside is completely passed into the inside of the production box 3. During this process, the pressure of the production box 3 increases, and the exhaust solenoid valve 161 is started. The excess gas inside the production box 3 enters the purification tank 163 inside the rack 168 through the exhaust solenoid valve 161 and the exhaust pipe 162. At this time, the activated carbon block 164 and the calcium hydroxide particles 165 absorb the acidic gas and some toxic gases, and the purified gas is discharged through the air hole 167 on the tank cover 166, and the filling of the alkali liquid is completed. The setting of the exhaust component 16 can not only stabilize the air pressure inside the production box 3, but also prevent toxic gases from polluting the environment.

[0026] Any matters not described in detail in this specification are prior art known to those skilled in the art. Standard parts used in this utility model are commercially available, and special-shaped parts can be customized according to the description in the specification and the accompanying drawings. The specific connection methods of each part are all conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment are all conventional models in the prior art, and the circuit connections use conventional connection methods in the prior art, which will not be described in detail here.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic alkali preparation device for producing hydroxypropyl methylcellulose, comprising a bottom plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected to a heating furnace (2), the inner side of the heating furnace (2) is fixedly connected to a production box (3), the top of the production box (3) is equipped with a box cover (4), the middle of the top of the box cover (4) is fixedly connected to a rotating motor (5), the bottom of the rotating motor (5) is fixedly connected to a stirring paddle (6) which is vertically arranged and located inside the production box (3), the bottom of the box cover (4) is fixedly connected to a vertically arranged bottom tube (7), the top of the bottom tube (7) is provided with a connecting pipe (8) which is connected to the bottom tube (7), the end of the connecting pipe (8) away from the bottom tube (7) is fixedly connected to a flow pump (9) which is connected to the connecting pipe (8), and the flow pump (9) A three-way valve (10) communicating with the flow pump (9) is fixedly connected to the side away from the connecting pipe (8), the bottom end of the three-way valve (10) is fixedly connected to the alkali liquid tank (11), the top end of the alkali liquid tank (11) is fixedly connected to the threaded barrel (12) communicating with the alkali liquid tank (11), the outer side of the threaded barrel (12) is spirally connected to a threaded cover (13), one side of the three-way valve (10) is fixedly connected to an air intake pipe (14) communicating with the three-way valve (10), the end of the air intake pipe (14) away from the three-way valve (10) is fixedly connected to an air pump (15) communicating with the air intake valve, and one side of the rotating motor (5) is provided with an exhaust assembly (16) mounted on the top end of the box cover (4).

2. The automatic alkali preparation device for hydroxypropyl methylcellulose production according to claim 1, characterized in that: The output shaft of the rotating motor (5) passes through the box cover (4) and is rotatably connected to the box cover (4). The connection between the connecting pipe (8) and the box cover (4) is a spiral connection. The flow pump (9) is fixedly connected to the top of the alkali liquid tank (11). The bottom end of the inner side of the alkali liquid tank (11) and the three-way valve (10) are mutually connected. The air pump (15) is fixedly connected to the top of the bottom plate (1).

3. The automatic alkali preparation device for hydroxypropyl methylcellulose production according to claim 1, characterized in that: The exhaust assembly (16) includes an exhaust solenoid valve (161) fixedly connected to the top of the box cover (4) and communicating with the inner side of the production box (3); the top of the exhaust solenoid valve (161) is fixedly connected to an exhaust pipe (162) communicating with the exhaust solenoid valve (161); one end of the exhaust pipe (162) away from the exhaust solenoid valve (161) is fixedly connected to a purification tank (163) communicating with the exhaust pipe (162); an activated carbon block (164) is provided on the inside of the purification tank (163); calcium hydroxide particles (165) are fixedly connected to the inside of the activated carbon block (164); the top of the purification tank (163) is spirally connected to a tank cover (166); an air hole (167) is provided inside the tank cover (166) and passes through the tank cover (166) from top to bottom; and a storage rack (168) is fixedly connected to the outside of the purification tank (163).

4. The automatic alkali preparation device for hydroxypropyl methylcellulose production according to claim 3, characterized in that: The outer side of the activated carbon block (164) is tightly fitted to the inner side of the purification tank (163), the number of the calcium hydroxide particles (165) is multiple, and the calcium hydroxide particles (165) are evenly distributed inside the activated carbon block (164).

5. The automatic alkali preparation device for hydroxypropyl methylcellulose production according to claim 3, characterized in that: There are a plurality of air holes (167), and the air holes (167) are evenly distributed inside the tank cover (166). The bottom end of the storage rack (168) is fixedly connected to the top end of the tank cover (4).

Images