Grinding device for nitroguanidine production

Abstract

A grinding device for nitroguanidine production belongs to the field of devices for nitroguanidine production and comprises a bottom plate assembly, a containing unit, a grinding unit, a protection unit and a filtering unit, the containing unit is clamped at the upper end of the bottom plate assembly, the bottom plate assembly is fixedly connected with the grinding unit, the grinding unit is used in cooperation with the containing unit, and the filtering unit is used in cooperation with the grinding unit. The protection unit is fixedly connected with the bottom plate assembly, and the bottom plate assembly is fixedly connected with the filtering unit. The problems that in the background technology, an existing grinding device is simple in structure and poor in protection performance, nitroguanidine is not stable in chemical property, the danger of explosion is generated due to the fact that the nitroguanidine is prone to being affected by the temperature generated by friction during grinding, and dust generated during grinding can harm operators can be solved.

Description

Technical Field

[0001] This utility model belongs to the field of equipment for the production of nitroguanidine, and in particular a grinding device for the production of nitroguanidine. Background Technology

[0002] Currently, ultrafine nitroguanidine decomposes and explodes when subjected to impact. In recent years, ultrafine nitroguanidine has been used as the main component of a new generation of automotive airbag inflators to replace sodium azide. However, in the processing and production of ultrafine nitroguanidine, the crystallized nitroguanidine needs to be ground.

[0003] Current grinding equipment has a simple structure and weak protection. Nitroguanidine is chemically unstable and is easily affected by the temperature generated by friction during grinding, which can lead to an explosion hazard. At the same time, the dust generated during grinding poses a danger to operators. In addition, the containers for raw materials in existing grinding equipment need to be cleaned after each use before grinding the next raw material. Cleaning is time-consuming and labor-intensive, and incomplete cleaning can affect the purity of the next raw material. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems existing in the prior art and to provide a grinding device for the production of nitroguanidine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A grinding apparatus for the production of nitroguanidine includes: a base plate assembly, a holding unit, a grinding unit, a protective unit, and a filtering unit. The holding unit is clamped at the upper end of the base plate assembly. The base plate assembly is fixedly connected to the grinding unit. The grinding unit and the holding unit are used in conjunction. The protective unit is fixedly connected to the base plate assembly. The base plate assembly is fixedly connected to the filtering unit.

[0007] The base plate assembly includes: a base plate, an electric telescopic rod, a cross plate, and a clamping unit. The electric telescopic rod is symmetrically fixed at the upper end of the base plate, and the cross plate is fixed at the upper end of the two electric telescopic rods. Two clamping units are symmetrically fixed at the upper end of the base plate.

[0008] Both clamping units include: a limiting plate, a clamping plate, a guide post, a screw, and a thermoelectric cooler. The upper end of the base plate is fixed with a limiting plate. The clamping plate is configured as an inverted L-shape. The rear end of the clamping plate is fixed with a guide post, which is slidably connected to the limiting plate. The rear end of the clamping plate is rotatably connected to a screw via a bearing. The screw is screwed into the limiting plate. The front end of the clamping plate is fixed with a thermoelectric cooler.

[0009] The holding unit includes: a container, a placement groove, a positioning cone, and a heat dissipation groove. The container is disposed between the two clamping units, and the two semiconductor cooler substrates abut against the side wall of the container. The upper end of the container is provided with a placement groove, and the top surface of the container is provided with multiple heat dissipation grooves.

[0010] The grinding unit includes a motor, a fixed block, support arms, and rubber grinding rollers. The motor is fixed at the lower end of the horizontal plate, and a fixed block is fixed on the output shaft of the motor. A tapered groove is provided at the lower end of the fixed block. Multiple support arms are evenly distributed and horizontally fixed on the fixed block, and a rubber grinding roller is rotatably connected to the lower end of each support arm.

[0011] The protective unit includes: two electric telescopic rods, a baffle, an air outlet, a filter, a rubber corrugated pipe, and an annular plate. Two electric telescopic rods are symmetrically fixed to the lower end of the horizontal plate. A baffle is fixed to the lower end of each electric telescopic rod. The baffle is slidably connected to the motor output shaft. An air outlet is provided on the baffle. A filter is provided at the lower end of the air outlet. A rubber corrugated pipe is fixed to the lower end of the baffle. An annular plate is fixed to the lower end face of the rubber corrugated pipe. The diameters of the rubber corrugated pipe and the annular plate are both larger than the diameter of the placement groove.

[0012] The filtration unit includes a water tank and an air pump. The water tank is fixed to the upper end of the horizontal plate, and the air pump is fixed to the side of the water tank. The air pump's inlet is fixedly connected to its outlet via an air pipe, and the air pump's outlet extends into the water tank. The water tank has an inlet and outlet at its upper end, and a drain valve is located on the side of the water tank. Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention provides a grinding apparatus for the production of nitroguanidine, which solves the problems mentioned in the background art: current grinding apparatuses have simple structures and weak protection; nitroguanidine is chemically unstable and easily affected by the temperature generated by friction during grinding, which could lead to an explosion hazard; and the dust generated during grinding can harm operators. It also solves the problem that existing grinding apparatuses require cleaning of the raw material containers after each use before grinding the next raw material, which is time-consuming and labor-intensive, and incomplete cleaning can affect the purity of the next raw material. Attached Figure Description

[0014] Figure 1 This is a rear view of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the clamping unit structure;

[0016] Figure 3 This is a top view of the container;

[0017] Figure 4This is a schematic diagram of the protective unit structure. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0019] A grinding apparatus for the production of nitroguanidine includes: a base plate assembly 1, a holding unit 2, a grinding unit 3, a protective unit 4, and a filtering unit 5. The holding unit 2 is clamped at the upper end of the base plate assembly 1. The base plate assembly 1 is fixedly connected to the grinding unit 3. The grinding unit 3 is used in conjunction with the holding unit 2. The protective unit 4 is fixedly connected to the base plate assembly 1. The base plate assembly 1 is fixedly connected to the filtering unit 5.

[0020] The base plate assembly 1 includes: a base plate 1-1, an electric telescopic rod 1-2, a horizontal plate 1-3, and a clamping unit 1-4. The electric telescopic rod 1-2 is symmetrically fixed to the upper end of the base plate 1-1, and the horizontal plate 1-3 is fixed to the upper end of the two electric telescopic rods 1-2. Two clamping units 1-4 are symmetrically fixed to the upper end of the base plate 1-1.

[0021] Both clamping units 1-4 include: a limiting plate 1-4-1, a clamping plate 1-4-2, a guide post 1-4-3, a screw 1-4-4, and a thermoelectric cooler 1-4-5. The limiting plate 1-4-1 is fixed at the upper end of the base plate 1-1. The clamping plate 1-4-2 is configured as an inverted L-shape. The guide post 1-4-3 is fixed at the rear end of the clamping plate 1-4-2. The guide post 1-4-3 is slidably connected to the limiting plate 1-4-1. The screw 1-4-4 is rotatably connected to the rear end of the clamping plate 1-4-2 through a bearing. The screw 1-4-4 is screwed into the limiting plate 1-4-1. The thermoelectric cooler 1-4-5 is fixed at the front end of the clamping plate 1-4-2.

[0022] The holding unit 2 includes: a container 2-1, a placement groove 2-2, a positioning cone 2-3, and a heat dissipation groove 2-4. The container 2-1 is disposed between two clamping units 1-4. The substrates of two semiconductor coolers 1-4-5 rest against the side wall of the container 2-1. The upper end of the container 2-1 is provided with a placement groove 2-2, and the top surface of the container 2-1 is provided with multiple heat dissipation grooves 2-4.

[0023] The grinding unit 3 includes: a motor 3-1, a fixing block 3-2, a support arm 3-3, and a rubber grinding roller 3-4. The motor 3-1 is fixed at the lower end of the horizontal plate 1-3. The fixing block 3-2 is fixed on the output shaft of the motor 3-1. A tapered groove is provided at the lower end of the fixing block 3-2. Multiple support arms 3-3 are evenly distributed and horizontally fixed on the fixing block 3-2. Each support arm 3-3 is rotatably connected to a rubber grinding roller 3-4 at its lower end.

[0024] The protective unit 4 includes: an electric telescopic rod 4-1, a baffle 4-2, an air outlet 4-3, a filter screen 4-4, a rubber corrugated pipe 4-5, and an annular plate 4-6. Two electric telescopic rods 4-1 are symmetrically fixed to the lower end of the horizontal plate 1-3. A baffle 4-2 is fixed to the lower end of the two electric telescopic rods 4-1. The baffle 4-2 is slidably connected to the output shaft of the motor 3-1. An air outlet 4-3 is provided on the baffle 4-2. A filter screen 4-4 is provided at the lower end of the air outlet 4-3. A rubber corrugated pipe 4-5 is fixed to the lower end of the baffle 4-2. An annular plate 4-6 is fixed to the lower end face of the rubber corrugated pipe 4-5. The diameters of the rubber corrugated pipe 4-5 and the annular plate 4-6 are both larger than the diameter of the placement groove 2-2.

[0025] The filter unit 5 includes a water tank 5-1 and an air pump 5-2. The water tank 5-1 is fixed to the upper end of the horizontal plate 1-3, and the air pump 5-2 is fixed to the side of the water tank 5-1. The air inlet of the air pump 5-2 is fixedly connected to the air outlet 4-3 through an air pipe. The air outlet of the air pump 5-2 is inserted into the water tank 5-1. The upper end of the water tank 5-1 is provided with a water inlet and an air outlet, and the side of the water tank 5-1 is provided with a drain valve.

[0026] The semiconductor cooler 1-4-5 is an existing technology and is purchased externally.

[0027] The working principle of this utility model is as follows:

[0028] This device is connected to an external power source. In use, the raw material is placed in the placement slot 2-2, and then the container 2-1 is placed between the two clamping units 1-4. At the same time, the screw 1-4-4 is rotated, and the guide post 1-4-3 limits the movement of the two clamping plates 1-4-2, thereby causing the substrates of the two semiconductor coolers 1-4-5 to press against the outer wall of the container 2-1, thus clamping the container 2-1. The inverted L-shaped arrangement of the clamping plates 1-4-2 can limit the movement of the container 2-1. During grinding, the semiconductor coolers 1-4-5 are powered on to cool the container 2-1, which can lower the temperature of the container 2-1 and prevent the heat generated during grinding from causing the raw material to explode. At the same time, the heat dissipation slot 2-4 can increase the contact area between the container 2-1 and the air to assist in heat dissipation.

[0029] Powering the two electric telescopic rods 1-2 causes the horizontal plate 1-3 to move downwards, which in turn moves the motor 3-1 downwards. This causes the top of the conical groove on the fixing block 3-2 to rest against the positioning cone 2-3, limiting the output shaft of the motor 3-1 and reducing its wobbling. It also limits the placement container 2-1, causing it to rest against the base plate 1-1. Powering the electric telescopic rod 4-1 causes the baffle 4-2 to slide downwards along the output of the motor 3-1, causing the annular plate 4-6 to rest against the upper end of the placement container 2-1, sealing it during grinding. The rubber bellows 4-5 acts as a buffer, preventing the baffle 4-2 from impacting the placement container 2-1 and causing the internal raw materials to explode. Powering the motor 3-1, through the fixing block 3-2, drives multiple support arms 3-3 to rotate, which in turn drives multiple rubber grinding rollers 3-4 to rotate. The raw materials are ground. Water is injected into water tank 5-1 through the water inlet and air outlet. The air outlet of air pump 5-2 is immersed in the water. When air pump 5-2 is powered on, the dust generated during grinding is sucked out through air outlet 4-3 and sent into water tank 5-1. Nitroguanidine is insoluble in cold water, so it precipitates at the bottom of the water. The gas is discharged through the water inlet and air outlet, which can effectively reduce the dust generated during grinding. The filter screen 4-4 can prevent the raw materials being sucked out. The drain valve can be controlled to release the water for treatment. After grinding is completed, the electric telescopic rod 1-2 and the electric telescopic rod 4-1 are powered on and reset. At the same time, the two clamping units 1-4 are reset. The container 2-1 can be removed. Then, the other container 2-1 is placed between the two clamping units 1-4. The above steps are repeated to perform the next grinding. This increases work efficiency and avoids affecting the purity of the raw materials.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A grinding device for nitroguanidine production, characterized by: Include: The bottom plate assembly (1), holding unit (2), grinding unit (3), protection unit (4) and filter unit (5), the bottom plate assembly (1) upper end clamping has holding unit (2), the bottom plate assembly (1) and grinding unit (3) fixed connection, the grinding unit (3) and holding unit (2) are used in coordination, the protection unit (4) and bottom plate assembly (1) fixed connection, the bottom plate assembly (1) and filter unit (5) fixed connection.

2. The grinding device for nitroguanidine production according to claim 1, characterized in that: The bottom plate assembly (1) includes: bottom plate (1-1), electric telescopic rod one (1-2), cross plate (1-3) and clamping unit (1-4), the bottom plate (1-1) upper end symmetry fixed electric telescopic rod one (1-2), two electric telescopic rod one (1-2) upper end fixed cross plate (1-3), the bottom plate (1-1) upper end symmetry fixed two clamping unit (1-4).

3. The grinding device for producing nitroguanidine according to claim 2, wherein: Two clamping units (1-4) all include: limit plate (1-4-1), clamping plate (1-4-2), guide pillar (1-4-3), screw rod (1-4-4) and semiconductor refrigerator (1-4-5), the bottom plate (1-1) upper end is fixed with limit plate (1-4-1), the clamping plate (1-4-2) is set as inverted L-shaped, the clamping plate (1-4-2) rear end is fixed with guide pillar (1-4-3), the guide pillar (1-4-3) is slidably connected with limit plate (1-4-1), the clamping plate (1-4-2) rear end is rotatably connected with screw rod (1-4-4) through bearing limit, the screw rod (1-4-4) is screw-connected with limit plate (1-4-1), the clamping plate (1-4-2) front end is fixed with semiconductor refrigerator (1-4-5).

4. The grinding device for producing nitroguanidine according to claim 3, wherein: The holding unit (2) includes: holder (2-1), placing groove (2-2), positioning cone (2-3) and heat dissipation groove (2-4), the holder (2-1) is arranged between two clamping units (1-4), two semiconductor refrigerators (1-4-5) base plate abut on the side wall of holder (2-1), the holder (2-1) upper end is provided with placing groove (2-2), the holder (2-1) top surface is provided with a plurality of heat dissipation grooves (2-4).

5. The grinding device for producing nitroguanidine according to claim 4, wherein: The grinding unit (3) includes: motor (3-1), fixed block (3-2), support arm (3-3) and rubber grinding roller (3-4), the cross plate (1-3) lower end is fixed with motor (3-1), the motor (3-1) output shaft is fixed with fixed block (3-2), the fixed block (3-2) lower end is provided with a tapered groove, the fixed block (3-2) is evenly fixed with a plurality of support arms (3-3), each support arm (3-3) lower end is rotatably connected with one rubber grinding roller (3-4).

6. The grinding device for producing nitroguanidine according to claim 5, wherein: Said protection unit (4) includes: electric telescopic rod two (4-1), baffle (4-2), air outlet (4-3), filter screen (4-4), rubber bellows (4-5) and annular plate (4-6), the lower end of the cross plate (1-3) is symmetrically fixed with two electric telescopic rod two (4-1), the lower end of two electric telescopic rod two (4-1) is fixed with baffle (4-2), the baffle (4-2) is sealingly and slidably connected with the output shaft of the motor (3-1), the baffle (4-2) is provided with air outlet (4-3), the lower end of the air outlet (4-3) is provided with filter screen (4-4), the lower end of the baffle (4-2) is fixed with rubber bellows (4-5), the lower end surface of the rubber bellows (4-5) is fixed with annular plate (4-6), the diameter of the rubber bellows (4-5) and the annular plate (4-6) is greater than the diameter of the placing groove (2-2).

7. The grinding device for nitroguanidine production according to claim 6, characterized in that: Said filter unit (5) includes: water tank (5-1) and air pump (5-2), the upper end of the cross plate (1-3) is fixed with water tank (5-1), the side of the water tank (5-1) is fixed with air pump (5-2), the air inlet end of the air pump (5-2) is fixedly communicated with the air outlet (4-3) through the air pipe, the air outlet end of the air pump (5-2) penetrates into the water tank (5-1), the upper end of the water tank (5-1) is provided with a water inlet and air outlet, the side of the water tank (5-1) is provided with a water drain valve.

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