Ammonium perchlorate crystallization quality monitoring and metering system and monitoring method

Abstract

The present invention discloses a perchlorate ammonium crystallization quality monitoring and metering system and a monitoring method, which relate to the field of perchlorate ammonium crystallization quality monitoring and metering systems. There are two groups of metering pump devices. One group of metering pump devices is installed at the bottom of the reactor and is used to measure the amount of perchlorate ammonium discharged into the collection tank; the other group of metering pump devices is installed on the outer surface of the by-product collection box and is used to measure the amount of perchlorate ammonium in the perchlorate ammonium layer. In the present invention, the amount of perchlorate ammonium measured by the metering device is more accurate, the problem of residue caused by materials flowing downward into the communication port is reduced and avoided, and the defect of waste of mechanical energy existing in the use of the metering device is made up for.

Description

Technical Field

[0001] The present invention relates to the technical field of ammonium perchlorate crystallization quality monitoring and metering systems, and particularly relates to an ammonium perchlorate crystallization quality monitoring and metering system and a monitoring method. Background Art

[0002] In the prior art, in the metering pump device applied to the ammonium perchlorate crystallization quality monitoring and metering system, since a communication port needs to be opened between the pumping metering chamber and the external pipeline for communication, when the piston rod moves towards the inside of the pumping metering chamber, a part of the material will be pushed into the communication port and there will be residues. Although the volume of the communication port has been reduced in the prior art, there is still a part of the residual material, resulting in a certain degree of deviation in the metering data.

[0003] Therefore, we provide an ammonium perchlorate crystallization quality monitoring and metering system and a monitoring method to solve the above problems. Summary of the Invention

[0004] In view of the above problems existing in the prior art, the present invention provides an ammonium perchlorate crystallization quality monitoring and metering system and a monitoring method to solve the problem of a certain degree of deviation in metering data caused by the structural defects of the metering pump device.

[0005] To achieve the above object, an ammonium perchlorate crystallization quality monitoring and metering system adopted by the present invention includes: a reactor, a collection tank, a cooling device, a by-product collection box, an oscillation box and a metering pump device. Sodium perchlorate and ammonium chloride are added to the reactor, and sodium perchlorate and ammonium chloride undergo a metathesis reaction to form a filtrate and a filter residue.

[0006] The collection tank is located below the reactor and allows the filter residue to enter.

[0007] The cooling device is located on one side below the reactor and allows the filtrate to enter. The filtrate enters the cooling device to cool down, and by-products gradually precipitate. The by-products contain sodium chloride and a small amount of ammonium perchlorate.

[0008] The by-product collection box is located on one side of the cooling device. The oscillation box is located inside the by-product collection box. The by-products are transported into the oscillation box for oscillation stratification to form a sodium chloride layer and an ammonium perchlorate layer. Ammonium perchlorate is located above sodium chloride, separating sodium chloride and ammonium perchlorate.

[0009] Two groups of metering pump devices are provided. One group of metering pump devices is installed at the bottom of the reactor and is used to measure the amount of ammonium perchlorate discharged into the collection tank; the other group of metering pump devices is installed on the outer surface of the by-product collection box and is used to measure the amount of ammonium perchlorate in the ammonium perchlorate layer.

[0010] As a further optimization of the above solution, the metering pump device includes a motor, a mounting seat, a power housing, a first docking pipe, a second docking pipe, and an external pipe. One end of the motor is provided with a mounting seat, and the power housing is fixedly installed on the mounting seat. One side of the power housing is integrally provided with a first docking pipe. The second docking pipe is arranged at the end of the first docking pipe away from the power housing. One external pipe is provided on each of the upper and lower sides of the second docking pipe. First internal threads are provided at the ends of the two external pipes away from the second docking pipe, and the first internal threads are docked with external pipes. When discharging ammonium perchlorate, the ammonium perchlorate passes through the external pipes.

[0011] As a further optimization of the above solution, a rocker arm is arranged in the power housing. A first hole is arranged at one end of the rocker arm, and a second hole is arranged at the other end of the rocker arm. The end of the rocker arm with the second hole extends into the first docking pipe movably. The rotating shaft on the motor penetrates into the interior of the power housing movably, and a first shaft is fixedly arranged at the eccentric part of the end of the rotating shaft on the motor. A ball bearing is sleeved on the outer ring of the first shaft, and the ball bearing is installed inside the first hole. A piston rod is telescopically arranged in the middle of the second docking pipe. A second shaft is fixedly arranged at one end of the piston rod, and the second shaft is rotatably arranged inside the second hole. A rubber pad is fixedly arranged at the other end of the piston rod, and the rubber pad is slidably arranged inside the second docking pipe. A pumping metering chamber is formed between the end of the rubber pad away from the piston rod and the inner wall of the second docking pipe.

[0012] As a further optimization of the above solution, second internal threads for connecting the ends of the external pipes are arranged at both the upper and lower ends of the second docking pipe, and the external pipes are communicated with the pumping metering chamber inside the second docking pipe.

[0013] As a further optimization of the above solution, clamping members are arranged inside the ends of the upper and lower external pipes close to the second docking pipe. The clamping members include a first clamping ring, a middle base ring, and a second clamping ring. The first clamping ring and the second clamping ring are respectively attached to both ends of the middle base ring. The clamping members are clamped inside the external pipes. The inner diameters of the first clamping ring and the second clamping ring are both smaller than the inner diameter of the middle base ring. A blocking ball is arranged in the middle base ring, and the diameter of the blocking ball is larger than the inner diameters of the first clamping ring and the second clamping ring.

[0014] As a further optimization of the above solution, a rotating rod is rotatably arranged on the inner wall of the pumping metering chamber, and a movable baffle is fixedly arranged on the rotating rod. The movable baffle movably blocks the upper surface of the communication port below the pumping metering chamber, and the end of the movable baffle with the rotating rod is attached to the inner wall of the pumping metering chamber away from the piston rod.

[0015] As a further optimization of the above solution, the plugging ball includes a core body and an outer protective shell. The core body is of a cylindrical structure, and an external thread is provided on the outside of the core body. The outer protective shell includes two symmetric hemispherical shell structures. The inside of the hemispherical shell structure is a circular groove, and an internal thread structure is provided on the inner wall of the circular groove. The hemispherical shell structure is rotatably installed outside the core body.

[0016] As a further optimization of the above solution, flanges are integrally provided at one ends of the first docking pipe and the second docking pipe close to each other. A heat insulation broken bridge ring is provided between the two flanges, and the heat insulation broken bridge ring and the two flanges are fixed by screws.

[0017] As a further optimization of the above solution, a discharge hole and a suction hole are respectively provided above and on the side of the power shell. A first one-way valve is provided in the discharge hole, and the first one-way valve can unidirectionally discharge the air inside the power shell to the outside of the power shell. A second one-way valve is provided in the suction hole, and the second one-way valve can unidirectionally allow the external air to enter the power shell. And the suction hole is conical, and the small end of the suction hole communicates with the inside of the power shell.

[0018] The present invention also discloses a monitoring method for an ammonium perchlorate crystallization quality monitoring and metering system, which is applicable to the ammonium perchlorate crystallization quality monitoring and metering system.

[0019] The ammonium perchlorate crystallization quality monitoring and metering system and monitoring method of the present invention have the following beneficial effects:

[0020] In the ammonium perchlorate crystallization quality monitoring and metering system and monitoring method of the present invention, metering pump devices are provided at the outlet where the reactor discharges into the collection tank and at the discharge outlet of the material suction fan. The ammonium perchlorate discharged twice is metered to obtain the total amount of ammonium perchlorate, and it is judged whether the amount of ammonium perchlorate produced under a batch of raw materials meets the standard;

[0021] Each time the piston rod reciprocates, the amount of material pushed out is fixed and can be used for metering the material. And in the present invention, when the piston rod moves in a direction away from the pumping metering chamber, the material in the lower external pipeline will push the movable baffle open and enter the inside of the pumping metering chamber from the side close to the rubber pad. After the material completely enters the pumping metering chamber, the movable baffle uses its own gravity and the pressing force of the material to reset and can timely block the communication port, avoiding the phenomenon that the material in the pumping metering chamber remains in the communication port; when the piston rod moves in the direction of the inside of the pumping metering chamber, the material in the pumping metering chamber is completely pushed into the upper external pipeline. Although the movable baffle may open upward during this process, since the material is located above the movable baffle, the process of the movable baffle opening upward can further drive the material to be pushed into the upper external pipeline, avoiding the problem that the material enters the communication port downward and remains.

[0022] The outer protective shell is made of rubber or other materials and has a certain elastic deformation ability. When the outer protective shell is in contact with the middle of the corresponding first clamp ring or the second clamp ring, a good seal can be achieved. Even if the outer surface of the outer protective shell is damaged, the outer protective shell can be elastically deformed to make up for the defect, thereby achieving a good sealing effect. This increases the service life of the sealing ball and reduces the phenomenon of inaccurate measurement data caused by poor sealing.

[0023] The purpose of synchronously dissipating heat to the rocker arm inside the power housing and the vicinity of the first shaft is achieved, and the mechanical energy during the reciprocating process of the piston rod is fully utilized, thereby reducing the waste of mechanical energy;

[0024] The present invention utilizes an incompletely sealed power shell to fully reduce the resistance of the piston rod during its reciprocating movement.

[0025] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating how the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereby, and the embodiments of the present invention include many changes, modifications and equivalents within the spirit and scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a metering pump device from one perspective of the present invention;

[0027] Figure 2 This is a schematic structural diagram of the metering pump device of the present invention from another perspective;

[0028] Figure 3 A top view of the metering pump device of the present invention;

[0029] Figure 4 For the present invention Figure 3 Cross-section at AA;

[0030] Figure 5 This is a schematic diagram of the internal structure of the second docking pipe and the external pipe of the present invention;

[0031] Figure 6 This is a schematic diagram of the sealing ball structure of the present invention;

[0032] Figure 7 This is an axial cross-sectional view of the sealing ball of the present invention;

[0033] Figure 8 This is a radial cross-sectional view of the sealing ball of the present invention;

[0034] Figure 9 This is a diagram of the ammonium perchlorate crystallization process of the present invention;

[0035] Figure 10Schematic structural diagram of the ammonium perchlorate crystallization quality monitoring and metering system of the present invention;

[0036] Figure 11 Schematic internal structure diagram of the by-product collection box of the present invention;

[0037] Figure 12 Of the present invention Figure 11 Enlarged schematic diagram of the structure at H in

[0038] In the figure: 100, reactor; 200, collection tank; 300, cooling equipment; 400, by-product collection box; 401, oscillator; 500, oscillation box; 600, metering pump device; 601, material suction fan; 602, soft feeding pipe; 603, electric push rod; 604, suction ring; 605, suction hole; 606, height sensor; 1, motor; 2, mounting seat; 3, power shell; 4, first docking pipe; 5, second docking pipe; 6, external connection pipe; 7, first internal thread; 8, flange; 9, heat insulation broken bridge ring; 10, suction hole; 11, discharge hole; 12, piston rod; 13, rubber pad; 14, rocker arm; 15, first shaft; 16, first hole; 17, ball bearing; 18, second hole; 19, second shaft; 20, shaft seal; 21, first one-way valve; 22, second one-way valve; 23, second internal thread; 24, pumping metering chamber; 25, communication port; 26, rotating rod; 27, movable baffle; 28, blocking ball; 29, clamping part; 30, first clamping ring; 31, intermediate base ring; 32, second clamping ring; 33, outer protective shell; 34, core body. Specific embodiments

[0039] Please refer to the attached Figure 1-8 of the specification, the present invention provides a technical solution: an ammonium perchlorate crystallization quality monitoring and metering system and a monitoring method, including:

[0040] When producing ammonium perchlorate by cold double decomposition, first add sodium perchlorate (NaClO4) and ammonium chloride (NH4Cl) into the reactor 100 for double decomposition reaction. After filtration and washing, a filtrate and filter residue are formed. The filter residue is dried to form ammonium perchlorate (NH4ClO4), and the filtrate is a by-product. The main component in the by-product is sodium chloride (NaCl), and the by-product also contains a small amount of ammonium perchlorate (NH4ClO4).

[0041] In the present invention, in order to make the by-product sodium chloride (NaCl) produced from the production of ammonium perchlorate meet the industrial salt standard, the filtrate is treated by a cold crystallization process. The filter residue is first filtered to remove large-particle ammonium perchlorate (NH4ClO4) impurities, and then a clear by-product solution is obtained. However, there is still a small amount of ammonium perchlorate (NH4ClO4) in the by-product solution at this time. Therefore, the by-product solution is placed in the cooling device 300, and the solution temperature is slowly decreased. As the temperature decreases, sodium chloride (NaCl) gradually crystallizes out.

[0042] Benefits of the cold crystallization process treatment:

[0043] It can replace the existing evaporation crystallization process in which ammonium perchlorate (NH4ClO4) is prone to thermal decomposition to produce various impurities such as nitrogen, oxygen, chlorine, and water.

[0044] The crystallized sodium chloride (NaCl) contains a small amount of ammonium perchlorate (NH4ClO4). The two are placed in the oscillator by-product collection box 400 and oscillated to make sodium chloride (NaCl) and ammonium perchlorate (NH4ClO4) layer. Among them, the density of ammonium perchlorate (NH4ClO4) is 1.95 g / cm 3 , the density of sodium chloride (NaCl) is 2.165 g / cm³, and ammonium perchlorate (NH4ClO4) is located above sodium chloride (NaCl), obtaining layered sodium chloride (NaCl) and ammonium perchlorate (NH4ClO4).

[0045] Since both sodium chloride (NaCl) and ammonium perchlorate (NH4ClO4) are white crystalline powders, it is difficult to distinguish them from the appearance. Currently, a water solubility test is usually used to distinguish between the two. However, using a water solubility test to distinguish sodium chloride (NaCl) and ammonium perchlorate (NH4ClO4) is clearly not applicable to the separation and collection of two mixed components during the industrial production process. Therefore, in the present invention, a wind separation system is provided. The wind separation system includes a material suction fan 601, a flexible feed pipe 602, and a suction ring 604. An oscillation box 500 is provided in the by-product collection box 400. An oscillator 401 is provided at the bottom of the oscillation box 500. The crystallized sodium chloride (NaCl) and ammonium perchlorate (NH4ClO4) are uniformly put into the oscillation box 500. The oscillator 401 is started to oscillate the oscillation box 500. After oscillating for a certain period of time, sodium chloride (NaCl) and ammonium perchlorate (NH4ClO4) are stratified. The material suction fan 601 is installed outside the by-product collection box 400. The material suction fan 601 is connected to the flexible feed pipe 602. The flexible feed pipe 602 is connected to the suction ring 604. The suction ring 604 is located in the oscillation box 500. A plurality of suction holes 605 are provided at the bottom of the suction ring 604. The suction ring 604 has an annular structure. A height sensor 606 is provided at the outer circle of the suction ring 604. An electric push rod 603 is also fixedly installed at the top of the by-product collection box 400. The electric push rod 603 is vertically distributed. The bottom of the electric push rod 603 is connected to the upper surface of the suction ring 604.

[0046] During operation, the height sensor 606 continuously monitors the height between itself and the materials in the oscillation box 500, controlling the height between the suction ring 604 and the materials in the oscillation box 500 to always be about 1 cm. Then, the material suction fan 601 is turned on. Since the sodium chloride (NaCl) on the upper layer of the materials is lighter in mass, the ammonium perchlorate (NH4ClO4) will be absorbed into the flexible feed pipe 602 and then discharged along the outlet of the material suction fan 601. While the sodium chloride (NaCl) is heavier in mass and will not be sucked into the flexible feed pipe 602, thus realizing the separation of sodium chloride (NaCl) and ammonium perchlorate (NH4ClO4).

[0047] It should be noted that the principle of keeping the height of the material in the suction ring 604 and the oscillation box 500 at about 1 cm is as follows: when the height sensor 606 monitors that the height of the suction ring 604 from the upper surface of the material exceeds the range of 0.8 - 1.2 cm, this information is fed back to the controller, and the controller controls the electric push rod 603 to start, driving the suction ring 604 to rise or fall, so as to adjust the distance between the suction ring 604 and the material, ensuring that the height of the suction ring 604 is appropriate, enabling the ammonium perchlorate (NH4ClO4) on the upper layer of the material to be smoothly sucked in from the suction hole 605; the controller is the KZ-01 electric telescopic push rod controller, or a controller of different brands and manufacturers can be selected according to actual needs, which is a conventional selection according to actual needs and will not be elaborated here.

[0048] Among them, the suction force of the material suction fan 601 needs to be calculated according to the actual pipeline layout. The suction force of the material suction fan 601 can be calculated by the following formula, which can ensure that only ammonium perchlorate (NH4ClO4) with a density of 1.95 g / cm 3 is sucked out:

[0049] Ps = ρvdΔp

[0050] where Ps is the suction force (Pa), ρ is the dust density (kg / m³), v is the gas flow velocity (m / s), d is the inner diameter of the pipeline (m), and Δp is the pipeline pressure drop (Pa).

[0051] Assume that the length of the pipeline is 200 m, the inner diameter is 0.5 m, the gas flow velocity is 20 m / s, the dust density is 1.2 kg / m³, the dust concentration is 10 mg / m³, and the static pressure of the fan is 1000 Pa. Then the suction force calculation is as follows:

[0052] First, the pipeline resistance needs to be calculated. According to the dust concentration and the pipeline length, it can be calculated as: .

[0053] Next, the pipeline friction pressure drop needs to be calculated. It is calculated according to the inner diameter, flow velocity and length: .

[0054] Finally, according to the formula, the suction force is: .

[0055] The ammonium perchlorate crystallization quality monitoring and metering system in the present invention further includes a metering component, which is respectively used to measure the ammonium perchlorate (NH4ClO4) formed after the filter residue is dried and the ammonium perchlorate (NH4ClO4) separated from subsequent by-products, so as to obtain the final weight of ammonium perchlorate (NH4ClO4), and judge whether it meets the mass production standard. This replaces the method in the prior art that only measures the ammonium perchlorate (NH4ClO4) formed after the filter residue is dried. The metering is more accurate, and the separation of ammonium perchlorate (NH4ClO4) and sodium chloride (NaCl) in the by-products is simple and convenient. The obtained by-product sodium chloride (NaCl) can be directly applied as an industrial salt raw material and meets the industrial salt quality standard without further treatment.

[0056] In the present invention, a collection tank 200 is arranged below the reactor 100. The ammonium perchlorate (NH4ClO4) formed after the filter residue is dried is discharged into the collection tank 200 for collection. One side of the reactor 100 is connected to a cooling device 300, and the filtrate is discharged into the cooling device 300 to form sodium chloride (NaCl) and ammonium perchlorate (NH4ClO4) through a cold crystallization process. A material pump is arranged on one side of the cooling device 300, and the material containing sodium chloride (NaCl) and ammonium perchlorate (NH4ClO4) is sent into the oscillation box 500 together through the material pump. The oscillator 401 oscillates the material in the oscillation box 500, and the ammonium perchlorate (NH4ClO4) and sodium chloride (NaCl) are stratified up and down.

[0057] Metering pump devices 600 are arranged at the outlet where the reactor 100 discharges into the collection tank 200 and at the discharge outlet of the material suction fan 601 to measure the amount of ammonium perchlorate (NH4ClO4) discharged twice, obtain the total amount of ammonium perchlorate (NH4ClO4), and judge whether the amount of ammonium perchlorate (NH4ClO4) produced under a batch of raw materials meets the standard.

[0058] In the metering pump device 600 of the present invention, it includes a motor 1, a mounting seat 2, a power housing 3, a first docking pipeline 4, a second docking pipeline 5, and an external pipeline 6. One end of the motor 1 is provided with a mounting seat 2, and a power housing 3 is fixedly installed on the mounting seat 2. One side of the power housing 3 is integrally provided with a first docking pipeline 4. The second docking pipeline 5 is arranged at the end of the first docking pipeline 4 away from the power housing 3. One external pipeline 6 is provided on each of the upper and lower sides of the second docking pipeline 5. The ends of the two external pipelines 6 away from the second docking pipeline 5 are both provided with a first internal thread 7, and the first internal thread 7 is docked with an external pipeline. When discharging ammonium perchlorate (NH4ClO4), the ammonium perchlorate (NH4ClO4) passes through the external pipeline 6. A rocker arm 14 is arranged in the power housing 3. One end of the rocker arm 14 is provided with a first hole 16, and the other end of the rocker arm 14 is provided with a second hole 18. The end of the rocker arm 14 with the second hole 18 extends into the first docking pipeline 4 movably. The rotating shaft on the motor 1 penetrates into the interior of the power housing 3 movably, and a first shaft 15 is fixedly arranged at the eccentric part of the end of the rotating shaft on the motor 1. A ball bearing 17 is sleeved on the outer ring of the first shaft 15, and the ball bearing 17 is installed inside the first hole 16.

[0059] Wherein, flanges 8 are integrally arranged at the ends of the first docking pipeline 4 and the second docking pipeline 5 close to each other. A heat insulation broken bridge ring 9 is padded between the two flanges 8, and the heat insulation broken bridge ring 9 is fixed to the two flanges 8 by screws. A piston rod 12 is telescopically arranged in the middle of the second docking pipeline 5. One end of the piston rod 12 is fixedly provided with a second shaft 19, and the second shaft 19 is rotatably arranged inside the second hole 18. The other end of the piston rod 12 is fixedly provided with a rubber pad 13, and the rubber pad 13 is slidably arranged inside the second docking pipeline 5. A pumping metering chamber 24 is formed between the end of the rubber pad 13 away from the piston rod 12 and the inner wall of the second docking pipeline 5. Second internal threads 23 for connecting the ends of the external pipelines 6 are arranged at both the upper and lower ends of the second docking pipeline 5, and the external pipeline 6 is communicated with the pumping metering chamber 24 inside the second docking pipeline 5.

[0060] At both the upper and lower ends of the two external connecting pipes 6 close to the second docking pipe 5, there are clamping members 29 inside. The clamping member 29 includes a first clamping ring 30, an intermediate base ring 31, and a second clamping ring 32. The first clamping ring 30 and the second clamping ring 32 are respectively attached to both ends of the intermediate base ring 31. The clamping member 29 is clamped inside the external connecting pipe 6. The inner diameters of the first clamping ring 30 and the second clamping ring 32 are both smaller than the inner diameter of the intermediate base ring 31. A blocking ball 28 is arranged in the intermediate base ring 31, and the diameter of the blocking ball 28 is larger than the inner diameters of the first clamping ring 30 and the second clamping ring 32. During operation, the motor 1 is started, and the rotating shaft of the motor 1 drives the first shaft 15 to move in a circular motion. Since the first shaft 15 is installed in the first hole 16, when the first shaft 15 moves in a circular motion, the rocker arm 14 will intermittently push the piston rod 12 to reciprocate, thereby compressing or releasing the pumping and metering chamber 24. When the piston rod 12 moves away from the pumping and metering chamber 24 and releases the pumping and metering chamber 24, a negative pressure is generated inside the pumping and metering chamber 24. Under the action of the negative pressure, the blocking ball 28 in the upper external connecting pipe 6 falls due to gravity and seals the middle part of the second clamping ring 32 in the upper external connecting pipe 6, and the material enters the pumping and metering chamber 24 from the bottom external connecting pipe 6. When the piston rod 12 moves towards the inside of the pumping and metering chamber 24 and compresses the pumping and metering chamber 24, the blocking ball 28 in the lower external connecting pipe 6 seals the middle part of the first clamping ring 30 in the lower external connecting pipe 6 due to the thrust. At this time, the material in the pumping and metering chamber 24 can only be discharged from the upper external connecting pipe 6, and the blocking ball 28 in the upper external connecting pipe 6 is lifted by the material, and the material can smoothly pass through the external connecting pipe 6 and be discharged upward. Moreover, each time the piston rod 12 reciprocates, the amount of material pushed out is fixed. Therefore, the metering of the material is completed.

[0061] In the prior art, such metering devices have the following disadvantages:

[0062] Since a communication port 25 needs to be opened on the inner wall of the second docking pipe 5 to connect the pumping metering chamber 24 and the external pipeline 6, when the piston rod 12 moves into the pumping metering chamber 24, a part of the material will be pushed into the communication port 25 and there will be residues. In the prior art, although the volume of the communication port 25 is reduced, there is still a part of the residual material, resulting in a certain degree of deviation in the metering data. Therefore, in the present invention, a rotating rod 26 is rotatably arranged on the inner wall of the pumping metering chamber 24, and a movable baffle 27 is fixedly arranged on the rotating rod 26. The movable baffle 27 movably seals the upper surface of the communication port 25 below the pumping metering chamber 24. One end of the movable baffle 27 with the rotating rod 26 is attached to the inner wall of the pumping metering chamber 24 far from the piston rod 12; when the piston rod 12 moves away from the pumping metering chamber 24, the material in the lower external pipeline 6 will push the movable baffle 27 to open and enter the inside of the pumping metering chamber 24 from the side close to the rubber pad 13. After the material completely enters the pumping metering chamber 24, the movable baffle 27 can be reset by its own gravity and the pressing force of the material to timely seal the communication port 25, avoiding the phenomenon that the material in the pumping metering chamber 24 remains in the communication port 25; when the piston rod 12 moves towards the inside of the pumping metering chamber 24, the material in the pumping metering chamber 24 is completely pushed into the upper external pipeline 6. Although the movable baffle 27 may open upwards during this process, since the material is located above the movable baffle 27, the upward opening process of the movable baffle 27 can further drive the material to be pushed into the upper external pipeline 6, avoiding the problem that the material enters the communication port 25 downward and causes residues.

[0063] Furthermore, in the present invention, the first clamping ring 30, the intermediate base ring 31 and the second clamping ring 32 are all detachable. The first clamping ring 30 and the second clamping ring 32 are vulnerable parts, which are convenient for regular replacement and reduce the use cost, replacing the way of using the integral clamping part 29 in the prior art; and the connection and disassembly between the external pipeline 6 and the second docking pipe 5 are convenient. During the process of disassembling and assembling the external pipeline 6, the clamping part 29 can be smoothly taken out without separate assembly and disassembly, and the practicability is strong.

[0064] Considering that the plugging ball 28 may collide with the first snap ring 30 and the second snap ring 32 during the lifting process, the surface of the plugging ball 28 is easily damaged. When the plugging ball 28 is damaged, the sealing performance will decline, which reduces the accuracy of the measurement data. Therefore, in the present invention, in order to solve the problem of inaccurate measurement data caused by the damage of the plugging ball 28, the plugging ball 28 is set to two parts. The first part: the core body 34, the core body 34 is a cylindrical structure, and an external thread is provided on the outside of the core body 34, which can be made of hard plastic or metal materials. The second part: the outer protective shell 33, the outer protective shell 33 is composed of two symmetrical hemispherical shell structures. The inside of the hemispherical shell structure is a circular groove, and an internal thread structure is provided on the inner wall of the circular groove. The hemispherical shell structure can be rotatably installed outside the core body 34 to form the plugging ball 28. The outer protective shell 33 is made of materials such as rubber and has a certain elastic deformation ability. When the outer protective shell 33 fits with the middle part of the corresponding first snap ring 30 or the second snap ring 32, a good sealing effect can be achieved. Moreover, even if the outer surface of the outer protective shell 33 is damaged, since the outer protective shell 33 can elastically deform to make up for the damaged part, a good sealing effect can still be achieved, increasing the service life of the plugging ball 28 and reducing the phenomenon of inaccurate measurement data caused by poor sealing.

[0065] It is worth mentioning that due to the detachable connection between the outer protective shell 33 and the core body 34, when the outer protective shell 33 is severely worn, it can be replaced separately, further reducing the overall cost.

[0066] Since sodium chloride (NaCl) will decompose into nitrogen, oxygen, chlorine and water when heated, generating impurities and being inconvenient for storage, and in the industrial production process, the mechanical equipment will inevitably have the problem of excessive heat due to the operation of the motor. Therefore, in the present invention, a heat insulation broken bridge ring 9 is provided between the two flanges 8. The heat insulation broken bridge ring 9 can block the transfer of heat, reduce the influence of the heat generated by the motor 1 on the external pipeline 6, so that the ammonium perchlorate (NH4ClO4) measured at the external pipeline 6 is not affected by the temperature of the mechanical equipment, and the purity of the ammonium perchlorate (NH4ClO4) is improved.

[0067] Furthermore, a discharge hole 11 and a suction hole 10 are respectively arranged above and on the side of the power housing 3. A first one-way valve 21 is arranged in the discharge hole 11, and the first one-way valve 21 can unidirectionally discharge the air inside the power housing 3 to the outside of the power housing 3. A second one-way valve 22 is arranged in the suction hole 10, and the second one-way valve 22 can unidirectionally allow the outside air to enter the power housing 3. The suction hole 10 is conical, and the small end of the suction hole 10 communicates with the inside of the power housing 3. In cooperation with the reciprocating movement of the piston rod 12, the cavity inside the power housing 3 is also reciprocally compressed and released. During the process of releasing the inside of the power housing 3, the outside air enters the inside of the power housing 3 from the suction hole 10. Since the suction hole 10 is conical, the air is cooled when passing through the suction hole 10 and enters the inside of the power housing 3. As the power housing 3 is compressed, the high-temperature air inside the power housing 3 is discharged from the discharge hole 11, achieving the purpose of synchronously dissipating heat from the rocker arm 14 and near the first shaft 15 inside the power housing 3, and making full use of the mechanical energy during the reciprocating process of the piston rod 12, reducing the waste of mechanical energy.

[0068] In another embodiment, the mechanical energy generated by the piston rod 12 can not only be used for dissipating heat from the rocker arm 14 and the first shaft 15, but also reduce the resistance during the reciprocating movement of the piston rod 12. Because if the power housing 3 is a sealed chamber, as the piston rod 12 reciprocates, a high-pressure resistance will be generated during the process of compressing the power housing 3, and a negative-pressure resistance will be generated during the process of releasing the power housing 3, which will relatively increase the loss of mechanical energy. In the present invention, the incompletely sealed power housing 3 is utilized to fully reduce the resistance during the reciprocating movement of the piston rod 12.

[0069] It should be noted that it is common knowledge that the temperature will be reduced when the air enters from the large diameter of the suction hole 10 and exits from the small diameter. Specifically, according to Bernoulli's law and the principle of conservation of energy, when the air flows from the large diameter to the small diameter, the flow rate increases, resulting in a decrease in air pressure, the expansion of the air volume, an increase in the distance between molecules, and the work done by the intermolecular attraction force, thereby reducing the molecular kinetic energy, which is reflected as a decrease in the gas temperature.

[0070] As an alternative, an appropriate number of suction holes 10 and discharge holes 11 can be provided to increase the heat dissipation effect, which can be selected according to actual needs and will not be elaborated here.

[0071] It should also be noted that a shaft seal 20 is arranged inside the second docking pipe 5. The shaft seal 20 is rotatably sleeved outside the piston rod 12, and the shaft seal 20 is mainly used for strengthening and will not be elaborated here.

[0072] This is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A monitoring and metering system for the crystallization quality of ammonium perchlorate, comprising: A reactor (100), a collection tank (200), a cooling device (300), a by-product collection box (400), an oscillation box (500) and a metering pump device (600), characterized in that sodium perchlorate and ammonium chloride are added to the reactor (100), and a metathesis reaction between sodium perchlorate and ammonium chloride forms a filtrate and a filter residue; The collection tank (200) is located below the reactor (100) and allows the filter residue to enter; The cooling device (300) is located on one side below the reactor (100) and allows the filtrate to enter. The filtrate enters the cooling device (300) to cool down, and by-products gradually precipitate. The by-products contain sodium chloride and a small amount of ammonium perchlorate; The by-product collection box (400) is located on one side of the cooling device (300), and the oscillation box (500) is located inside the by-product collection box (400). The by-products are transported into the oscillation box (500) for oscillating stratification to form a sodium chloride layer and an ammonium perchlorate layer. The ammonium perchlorate is located above the sodium chloride to separate the sodium chloride and the ammonium perchlorate; There are two groups of the metering pump devices (600). One group of the metering pump devices (600) is installed at the bottom of the reactor (100) and is used to measure the amount of ammonium perchlorate discharged into the collection tank (200); the other group of the metering pump devices (600) is installed on the outer surface of the by-product collection box (400) and is used to measure the amount of ammonium perchlorate in the ammonium perchlorate layer; The metering pump device (600) includes a motor (1), a mounting seat (2), a power shell (3), a first docking pipe (4), a second docking pipe (5) and an external pipe (6). One end of the motor (1) is provided with the mounting seat (2), and the power shell (3) is fixedly installed on the mounting seat (2). One side of the power shell (3) is integrally provided with the first docking pipe (4). The second docking pipe (5) is arranged at the end of the first docking pipe (4) away from the power shell (3). One external pipe (6) is provided on each of the upper and lower sides of the second docking pipe (5). The ends of the two external pipes (6) away from the second docking pipe (5) are both provided with a first internal thread (7), and the first internal thread (7) is docked with an external pipe. When discharging ammonium perchlorate, the ammonium perchlorate passes through the external pipe (6); A rocker arm (14) is provided in the power housing (3). A first hole (16) is provided at one end of the rocker arm (14), and a second hole (18) is provided at the other end of the rocker arm (14). One end of the rocker arm (14) having the second hole (18) extends into the first docking pipe (4) movably. The rotating shaft on the motor (1) extends through to the inside of the power housing (3) movably, and a first shaft (15) is fixedly provided at the eccentric position of the end of the rotating shaft on the motor (1). A ball bearing (17) is sleeved on the outer ring of the first shaft (15), and the ball bearing (17) is installed inside the first hole (16). A piston rod (12) is telescopically provided in the middle of the second docking pipe (5). A second shaft (19) is fixedly provided at one end of the piston rod (12), and the second shaft (19) is rotatably provided inside the second hole (18). A rubber pad (13) is fixedly provided at the other end of the piston rod (12), and the rubber pad (13) is slidably provided inside the second docking pipe (5). A pumping metering chamber (24) is formed between one end of the rubber pad (13) away from the piston rod (12) and the inner wall of the second docking pipe (5). A rotating rod (26) is rotatably provided on the inner wall of the pumping metering chamber (24). A movable baffle (27) is fixedly provided on the rotating rod (26). The movable baffle (27) movably blocks the upper surface of the communication port (25) below the pumping metering chamber (24). One end of the movable baffle (27) having the rotating rod (26) fits against the inner wall of the pumping metering chamber (24) away from the piston rod (12).

2. The ammonium perchlorate crystallization quality monitoring and metering system according to claim 1, characterized in that: Second internal threads (23) for connecting the ends of the external pipes (6) are provided at both the upper and lower ends of the second docking pipe (5). The external pipes (6) are in communication with the pumping metering chamber (24) inside the second docking pipe (5).

3. The ammonium perchlorate crystallization quality monitoring and metering system according to claim 2, characterized in that: Clamping members (29) are provided inside one ends of the upper and lower external pipes (6) close to the second docking pipe (5). The clamping member (29) includes a first clamping ring (30), a middle base ring (31) and a second clamping ring (32). The first clamping ring (30) and the second clamping ring (32) are respectively attached to both ends of the middle base ring (31). The clamping member (29) is clamped inside the external pipe (6). The inner diameters of the first clamping ring (30) and the second clamping ring (32) are both smaller than the inner diameter of the middle base ring (31). A blocking ball (28) is provided in the middle base ring (31), and the diameter of the blocking ball (28) is larger than the inner diameters of the first clamping ring (30) and the second clamping ring (32).

4. A monitoring and metering system for the crystal quality of ammonium perchlorate according to claim 3, characterized in that: The blocking ball (28) includes a core body (34) and an outer protective shell (33). The core body (34) is of a cylindrical structure, and external threads are provided on the outside of the core body (34). The outer protective shell (33) includes two symmetric hemispherical shell structures. The inside of the hemispherical shell structure is a circular groove, and an internal thread structure is provided on the inner wall of the circular groove. The hemispherical shell structure is rotatably installed on the outside of the core body (34).

5. The ammonium perchlorate crystallization quality monitoring and metering system according to claim 4, characterized in that: One end of the first docking pipe (4) and the second docking pipe (5) close to each other are integrally provided with flanges (8). A heat insulation broken bridge ring (9) is provided between the two flanges (8), and the heat insulation broken bridge ring (9) and the two flanges (8) are fixed by screws.

6. A monitoring and metering system for the crystallization quality of ammonium perchlorate according to claim 1, characterized in that: A discharge hole (11) and a suction hole (10) are respectively provided above and on the side of the power shell (3). A first one-way valve (21) is provided in the discharge hole (11), and the first one-way valve (21) can unidirectionally discharge the air inside the power shell (3) to the outside of the power shell (3). A second one-way valve (22) is provided in the suction hole (10), and the second one-way valve (22) can unidirectionally introduce the outside air into the power shell (3). Moreover, the suction hole (10) is conical, and the small end of the suction hole (10) is communicated with the inside of the power shell (3).

7. A monitoring method for a monitoring and metering system of ammonium perchlorate crystallization quality, characterized in that: Applicable to the ammonium perchlorate crystallization quality monitoring and metering system according to any one of claims 1-6.

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