Acetic anhydride adding device for acetylsalicylic acid

Abstract

The utility model discloses an acetic anhydride adding device for acetylsalicylic acid, and relates to the technical field of medical chemistry. The device comprises a limiting tank, an adding protection tank and an adding pipe, an air blower penetrates through and is clamped to the bottom of the limiting tank, the adding protection tank is inserted into the limiting tank, cooling fins are welded and fixed to the peripheral face of the adding protection tank, a sealing top cover is clamped and fixed to the top of the adding protection tank, an air cylinder is clamped to the top of the sealing top cover, and the adding pipe is arranged on the outer side of the limiting tank. A protective cover is clamped and fixed to the peripheral face of the adding pipe, and a protective block is slidably clamped to the inner side of the adding pipe. According to the acetic anhydride adding device, the limiting tank, the adding protection tank and the adding pipe are arranged, so that the problems that an acetic anhydride adding device cannot be placed near a reaction device, a worker cannot take and use acetic anhydride conveniently, the physical and psychological health of the worker can be influenced by the characteristics of the acetic anhydride, and the acetic anhydride remaining at a pipe opening of the adding device can pollute the environment are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pharmaceutical chemistry, and particularly relates to an acetic anhydride adding device for acetylsalicylic acid. Background Art

[0002] Aspirin, also known as acetylsalicylic acid, is a white crystalline powder, soluble in ethanol, ether, slightly soluble in water, and is mainly used as an antipyretic, analgesic, non-steroidal anti-inflammatory drug, and antiplatelet aggregation drug. In the production and processing of acetylsalicylic acid, the reaction of acetic anhydride and salicylic acid is usually required. Acetic anhydride, also known as acetic anhydride, is a colorless transparent liquid with a strong acetic acid smell, sour taste, hygroscopicity, soluble in chloroform and ether, slowly dissolved in water to form acetic acid, and reacts with ethanol to form ethyl acetate. It is flammable, corrosive, and tear-inducing. Due to its certain toxicity, acetic anhydride is usually added using a functional adding device to ensure the accuracy of the amount added and the safety of use. However, it still has the following disadvantages in actual use:

[0003] 1. After the distillation process is completed, acetic anhydride usually needs to be dried at low temperature for storage due to its chemical properties. However, when acetic anhydride is needed, the reaction device usually needs to heat salicylic acid and acetic anhydride. The heat generated by the heating is likely to affect the surroundings. The temperature of acetic anhydride during storage is usually not allowed to exceed 30 degrees Celsius. Therefore, the acetic anhydride storage device needs to be placed away from the reaction device, which is not convenient for staff to use.

[0004] 2. Since acetic anhydride is toxic, sour, hygroscopic and tear-inducing, when it is added through an adding device, it may have an impact on the physical and mental health of personnel. When acetic anhydride is poured into salicylic acid, a small amount of acetic anhydride remains at the nozzle of the adding device after the addition is completed, causing pollution to the environment. Utility Model Content

[0005] The utility model aims to provide an acetic anhydride adding device for acetylsalicylic acid. By means of a limiting tank, an adding protection tank and an adding pipe, the utility model solves the problems that the acetic anhydride adding device cannot be placed near a reaction device, which is inconvenient for staff to take acetic anhydride, and when adding acetic anhydride, the characteristics of acetic anhydride may affect the physical and mental health of staff, and when pouring acetic anhydride into salicylic acid, the acetic anhydride remaining at the pipe mouth of the adding device may pollute the environment.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses an acetic anhydride adding device for acetylsalicylic acid, comprising a limiting tank, an adding protection tank and an adding pipe, wherein a blower is inserted through the bottom of the limiting tank, an adding protection tank is inserted in the limiting tank, a heat dissipation fin is welded and fixed on the outer peripheral surface of the adding protection tank, a sealing top cover is fixed on the top of the adding protection tank, a cylinder is fixed on the top of the sealing top cover, an adding pipe is arranged on the outer side of the limiting tank, a protective cover is fixed on the outer peripheral surface of the adding pipe, and a protective block is slidably connected on the inner side of the adding pipe;

[0008] The blower can drive the flow of air to cool the adding protection tank, so as to prevent the external environment temperature from affecting the acetic anhydride, so that the device can be placed near the reaction device for easy access by the staff. The heat dissipation fins can increase the heat dissipation area of ​​the adding protection tank and improve the heat dissipation efficiency. The cylinder can drive the sealing plate to move up and down to add an accurate amount of acetic anhydride, so as to improve the automation degree of the device. When adding acetic anhydride, the protective cover can cover the bottle mouth of the reaction container to prevent the smell of acetic anhydride from escaping and affecting the physical and mental health of the personnel. After the addition of acetic anhydride is completed, the protective block retracts to the inside of the adding tube, and the residual acetic anhydride on the surface of the protective block can be scraped off to prevent the residual acetic anhydride from polluting the environment.

[0009] Furthermore, an anti-skid pad is clamped and fixed on the bottom edge of the blower, one end of the heat dissipation fin is welded and fixed to the inner wall of the limit tank, and the additional protection tank is suspended on the top of the blower;

[0010] The blower can drive the flow of air, and the heat dissipation fins can increase the heat dissipation area of ​​the added protection tank and improve the heat dissipation efficiency. The flowing air quickly cools the heat dissipation fins and the added protection tank to avoid the influence of the external ambient temperature on acetic anhydride, so that the device can be placed near the reaction device for easy access by the staff.

[0011] Furthermore, a telescopic tube is slidably connected to the bottom of the cylinder, a sealing plate is fixed to the bottom of the telescopic tube, the telescopic tube is inserted through the top of the sealing top cover, the sealing plate is attached to the inner wall of the added protection tank, and a liquid inlet pipe is connected through the top of the sealing top cover;

[0012] The cylinder can drive the expansion and contraction of the telescopic tube, and further drive the sealing plate to move up and down, so as to add an accurate amount of acetic anhydride and improve the automation degree of the device.

[0013] Furthermore, a connecting hose is inserted through the top of the adding tube and connected thereto, a plug is inserted through the other end of the connecting hose and connected thereto, and the plug is inserted through the top of the sealing top cover and connected thereto;

[0014] Acetic anhydride enters the addition tube through a connecting hose and is then poured into the reaction vessel through a protective block. The mouth of the reaction vessel can be covered with a protective cap to prevent the odor of acetic anhydride from escaping and affecting the physical and mental health of personnel.

[0015] Furthermore, a conical groove is provided at the bottom of the protection block, a liquid inlet is provided at the top of the protection block, a liquid outlet is provided on the outer peripheral surface of the protection block, the liquid inlet and the liquid outlet are connected through the inside, the liquid outlet is located at the top of the conical groove, a return spring is clamped at the top of the protection block, and the other end of the return spring is clamped at the top of the adding tube;

[0016] When acetic anhydride is added, the acetic anhydride squeezes the protection block, causing one end of the protection block to detach from the addition tube, and the acetic anhydride drips into the reaction container through the liquid inlet and the liquid outlet. After the acetic anhydride is added, the protection block shrinks back into the addition tube under the elastic force of the return spring, so that the residual acetic anhydride on the surface of the protection block is scraped off, thereby avoiding the residual acetic anhydride from polluting the environment. The conical groove can prevent the acetic anhydride from remaining at the bottom of the protection block, further avoiding the residual acetic anhydride.

[0017] The utility model has the following beneficial effects:

[0018] 1. The utility model solves the problem that after the distillation process of acetic anhydride is completed, due to its chemical properties, it usually needs to be dried at low temperature for preservation. However, when acetic anhydride is needed, the reaction device usually needs to heat salicylic acid and acetic anhydride. The heat generated by the heating is likely to affect the surroundings, and the temperature of acetic anhydride during the storage process is often not allowed to exceed 30 degrees Celsius. Therefore, the acetic anhydride storage device needs to be placed away from the reaction device, which is inconvenient for staff to use. After a certain amount of acetic anhydride is poured into the inner side of the adding protection tank, the blower is started to drive the flow of air, and the heat dissipation and cooling of the heat dissipation fins and the adding protection tank are quickly carried out to avoid the influence of the external environment temperature on the acetic anhydride, so that the device can be placed near the reaction device for easy access by staff.

[0019] 2. The utility model solves the problem that acetic anhydride has certain toxicity, tastes sour, is hygroscopic and tear-inducing, and when acetic anhydride is added through an adding device, acetic anhydride may affect the physical and mental health of personnel, and when acetic anhydride is poured into salicylic acid, a small amount of acetic anhydride remains at the nozzle of the adding device after the addition is completed, causing environmental pollution. When acetic anhydride is added, the adding tube is inserted into the reaction container and the protective cover is attached to the bottle mouth of the container to prevent the smell of acetic anhydride from escaping and affecting the physical and mental health of personnel. After the addition, the protective block shrinks back into the adding tube under the elastic force of the reset spring, so that the residual acetic anhydride on the surface of the protective block is scraped off, thereby preventing the residual acetic anhydride from polluting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a structural diagram of the limit tank of the utility model;

[0022] Figure 3 Add a structural diagram of the protection tank to the utility model;

[0023] Figure 4 A structural diagram of the utility model with a tube and a protective cover added;

[0024] Figure 5 A cross-sectional view of the tube and protective cover is added to the utility model;

[0025] Figure 6 It is a cross-sectional view of the protection block of the utility model.

[0026] Reference numerals:

[0027] 1. Limiting tank; 101. Blower; 102. Anti-skid pad; 2. Adding protection tank; 201. Sealing top cover; 202. Cylinder; 203. Heat dissipation fins; 204. Liquid inlet pipe; 205. Telescopic pipe; 206. Sealing plate; 3. Adding pipe; 301. Protective cover; 302. Connecting hose; 303. Insert pipe; 304. Protective block; 305. Reset spring; 306. Liquid inlet; 307. Liquid outlet; 308. Conical groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] See also Figure 1-6 As shown, the utility model is an acetic anhydride adding device for acetylsalicylic acid, comprising a limiting tank 1, an adding protection tank 2 and an adding pipe 3, a blower 101 is inserted through the bottom of the limiting tank 1, the adding protection tank 2 is inserted in the limiting tank 1, a heat dissipation fin 203 is welded and fixed on the outer peripheral surface of the adding protection tank 2, a sealing top cover 201 is fixed on the top of the adding protection tank 2, a cylinder 202 is fixed on the top of the sealing top cover 201, an adding pipe 3 is arranged on the outer side of the limiting tank 1, a protective cover 301 is fixed on the outer peripheral surface of the adding pipe 3, and a protective block 304 is slidably fixed on the inner side of the adding pipe 3;

[0030] A certain amount of acetic anhydride is poured into the adding protection tank 2 and the blower 101 is turned on. The blower 101 drives the flow of air to cool the heat dissipation fins 203 and the adding protection tank 2 to prevent the external environment temperature from affecting the acetic anhydride. The device is moved to the vicinity of the reaction device. When adding acetic anhydride, the adding tube 3 is inserted into the reaction container and the protective cover 301 is attached to the bottle mouth of the container. The cylinder 202 is controlled to drive the sealing plate 206 to move upward a certain distance. The acetic anhydride squeezes the protective block 304, so that the acetic anhydride drips into the reaction container through the protective block 304. After the acetic anhydride is added, the protective block 304 is reset under the elastic force of the reset spring 305, and the residual acetic anhydride on the surface of the protective block 304 is scraped off through the adding tube 3.

[0031] Among them Figure 1-3 As shown, the bottom edge of the blower 101 is clamped and fixed with an anti-skid pad 102, one end of the heat dissipation fin 203 is welded and fixed to the inner wall of the limit tank 1, and a protection tank 2 is added to hang on the top of the blower 101;

[0032] The air flow is driven by the blower 101, and the heat dissipation area of ​​the adding protection tank 2 is increased through the heat dissipation fins 203. The flowing air quickly cools the heat dissipation fins 203 and the adding protection tank 2 to prevent the external environment temperature from affecting the acetic anhydride.

[0033] Among them Figure 1 , 3 As shown, a telescopic tube 205 is slidably connected to the bottom of the cylinder 202, a sealing plate 206 is fixed to the bottom of the telescopic tube 205, the telescopic tube 205 penetrates and is inserted into the top of the sealing top cover 201, the sealing plate 206 fits the inner wall of the adding protection tank 2, and a liquid inlet pipe 204 is penetrated and connected to the top of the sealing top cover 201;

[0034] A certain amount of acetic anhydride is poured into the addition protection tank 2 through the liquid inlet pipe 204. When the acetic anhydride is added, the cylinder 202 drives the telescopic tube 205 to contract, and further drives the sealing plate 206 to move upward, and presses a certain amount of acetic anhydride into the addition pipe 3 for addition.

[0035] Among them Figure 1 , 4 As shown in , 5 and 6, a connecting hose 302 is inserted through the top of the adding tube 3, and a plug 303 is inserted through the other end of the connecting hose 302, and the plug 303 is inserted through the top of the sealing top cover 201, a conical groove 308 is provided at the bottom of the protection block 304, a liquid inlet 306 is provided at the top of the protection block 304, and a liquid outlet 307 is provided on the outer peripheral surface of the protection block 304, and the liquid inlet 306 and the liquid outlet 307 are connected through the inside, and the liquid outlet 307 is located at the top of the conical groove 308, and a return spring 305 is inserted through the top of the protection block 304, and the other end of the return spring 305 is connected to the top of the adding tube 3;

[0036] When adding acetic anhydride, the adding tube 3 is inserted into the reaction container and the protective cover 301 is attached to the mouth of the container. The acetic anhydride enters the adding tube 3 through the connecting hose 302. The acetic anhydride squeezes the protective block 304 so that one end of the protective block 304 is separated from the adding tube 3. The acetic anhydride is poured into the reaction container through the liquid inlet 306 and the liquid outlet 307. After the addition of acetic anhydride is completed, the protective block 304 shrinks back into the adding tube 3 under the elastic force of the return spring 305, and the residual acetic anhydride on the surface of the protective block 304 is scraped off.

[0037] The specific working principle of the utility model is as follows: a certain amount of acetic anhydride is poured into the adding protection tank 2 through the liquid inlet pipe 204, the blower 101 is started to drive the flow of air, the heat dissipation area of ​​the adding protection tank 2 is increased through the heat dissipation fins 203, and the flowing air quickly cools the heat dissipation fins 203 and the adding protection tank 2 to avoid the influence of the external environment temperature on the acetic anhydride. The device is moved to the vicinity of the reaction device. When acetic anhydride is added, the adding tube 3 is inserted into the reaction container and the protective cover 301 is attached to the container. The cylinder 202 drives the telescopic tube 205 to contract, further drives the sealing plate 206 to move upward, and presses a certain amount of acetic anhydride into the adding tube 3 through the connecting hose 302. The acetic anhydride squeezes the protection block 304 so that one end of the protection block 304 is separated from the adding tube 3, and the acetic anhydride is poured into the reaction container through the liquid inlet 306 and the liquid outlet 307. After the acetic anhydride is added, the protection block 304 contracts back into the adding tube 3 under the elastic force of the reset spring 305, and the residual acetic anhydride on the surface of the protection block 304 is scraped off.

[0038] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. An acetic anhydride adding device for acetylsalicylic acid, comprising a limiting tank (1), an adding protection tank (2) and an adding pipe (3), characterized in that: A blower (101) is inserted through the bottom of the limiting tank (1), an addition protection tank (2) is inserted into the limiting tank (1), a heat dissipation fin (203) is welded and fixed to the outer peripheral surface of the addition protection tank (2), a sealing top cover (201) is fixed to the top of the addition protection tank (2), a cylinder (202) is fixed to the top of the sealing top cover (201), an addition pipe (3) is arranged on the outside of the limiting tank (1), a protection cover (301) is fixed to the outer peripheral surface of the addition pipe (3), and a protection block (304) is slidably fixed to the inside of the addition pipe (3).

2. The acetic anhydride adding device of acetylsalicylic acid according to claim 1, characterized in that: The bottom edge of the blower (101) is clamped and fixed with an anti-skid pad (102); one end of the heat dissipation fin (203) is welded and fixed to the inner wall of the limit tank (1); and the additional protection tank (2) is suspended from the top of the blower (101).

3. The acetic anhydride adding device of acetylsalicylic acid according to claim 1, characterized in that: A telescopic tube (205) is slidably connected to the bottom of the cylinder (202), a sealing plate (206) is fixedly connected to the bottom of the telescopic tube (205), the telescopic tube (205) is inserted through the top of the sealing top cover (201), the sealing plate (206) is attached to the inner wall of the adding protection tank (2), and a liquid inlet pipe (204) is connected through the top of the sealing top cover (201).

4. The acetic anhydride adding device of acetylsalicylic acid according to claim 1, characterized in that: A connecting hose (302) is inserted through the top of the adding pipe (3) and is clamped thereon. A plug (303) is inserted through the other end of the connecting hose (302) and is clamped thereon. The plug (303) is inserted through the top of the sealing top cover (201) and is clamped thereon.

5. The acetic anhydride adding device of acetylsalicylic acid according to claim 1, characterized in that: The bottom of the protection block (304) is provided with a conical groove (308), the top of the protection block (304) is provided with a liquid inlet (306), the outer peripheral surface of the protection block (304) is provided with a liquid outlet (307), the liquid inlet (306) and the liquid outlet (307) are connected through the inside, the liquid outlet (307) is located at the top of the conical groove (308), the top of the protection block (304) is clamped with a return spring (305), and the other end of the return spring (305) is clamped to the top of the addition pipe (3).

Images