Anti-crystallization self-circulation sampling device for emulsion explosive production

Abstract

This invention belongs to the field of emulsion explosive detection technology and discloses a self-circulating sampling device for preventing crystallization in emulsion explosive production. The device includes a detection component, with mounting frames installed at both the upper and lower ends of the left side of the detection component. A sampling component is located on the left side of the detection component, and its outer surface is connected to the mounting frames. A power component is installed on the outer surface of the sampling component. An extension rod extending into the detection component is connected to the side of the power component closest to the detection component. A scraping ring is fixedly sleeved on the outer surface of the extension rod inside the detection component. A sealing plate is fixedly installed at the end of the extension rod away from the power component. This invention improves the signal-to-noise ratio of the sensor in capturing weak electrochemical signals (pH value) and optical refractive index signals (concentration), ensuring laboratory-level detection accuracy even in industrial online environments and effectively preventing production formula misadjustments caused by fluid fluctuations.

Description

Technical Field

[0001] This invention belongs to the field of emulsion explosives detection technology, specifically an anti-crystallization self-circulating sampling device for emulsion explosives production. Background Technology

[0002] Emulsion explosives, widely used in mining, engineering blasting, and other fields, have a highly hazardous and demanding production process. On continuous production lines for emulsion explosives, real-time online monitoring of the physicochemical properties of the agents (such as aqueous phase pH, ammonium nitrate concentration, and fluid temperature) is crucial for ensuring product quality and production safety. Traditional detection methods typically involve directly installing sensor probes on the production pipeline or sampling and analyzing a portion of the fluid through a bypass to obtain real-time production data, thereby guiding adjustments to process parameters.

[0003] Emulsion explosives have a high viscosity, and during production and transportation, the fluid in the pipeline is often accompanied by pulsating pressure and unstable flow rate. When the fluid directly impacts the sensor probe, turbulence and pressure fluctuations can cause significant jumps in the readings of the pH electrode and refractometer prism, generating false signals. Furthermore, air bubbles entrained in the fluid can interfere with the sensor's contact surface under high pressure, preventing the detection data from accurately reflecting the static physicochemical properties of the explosive. This can lead to misjudgments in the production control system and, in severe cases, even safety accidents.

[0004] Emulsion explosives contain high concentrations of oxidizers such as ammonium nitrate, which are extremely sensitive to temperature. In sampling pipelines, due to relatively slow flow rates or dead zones, the explosive can easily experience a temperature drop, leading to the precipitation and adhesion of ammonium nitrate crystals on the sensor probe surface. This crystalline layer not only obstructs the sensor from contact with fresh fluid, causing "zero-point drift" or data failure, but as the crystalline layer thickens, the hard crystals can also damage the delicate sensor sensing surface. Currently, this problem is mainly solved by manual periodic disassembly and cleaning, but this requires frequent shutdowns, reducing production efficiency, and poses significant safety hazards in explosive environments. Summary of the Invention

[0005] The purpose of this invention is to provide a self-circulating sampling device for preventing crystallization in the production of emulsion explosives, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a self-circulating sampling device for preventing crystallization in the production of emulsion explosives, wherein mounting frames are installed at both the upper and lower ends of the left side of the detection component, a sampling component is provided on the left side of the detection component, the outer side of the sampling component is connected to the mounting frames, a power component is installed on the outer side of the sampling component, an extension rod extending into the detection component is connected to the side of the power component near the detection component, a scraping ring is fixedly sleeved on the outer side of the extension rod inside the detection component, and a sealing plate is fixedly installed at the end of the extension rod away from the power component, the power component is used to convert the kinetic energy of the fluid in the sampling component into power to drive the extension rod, scraping ring and sealing plate to perform axial reciprocating motion.

[0007] As a further technical solution of the present invention, the detection component includes a detection chamber, the outer side of which is connected to the mounting frame. A wastewater storage pipe is fixedly connected to the end of the detection chamber away from the mounting frame. A sealing port is provided at the connection between the detection chamber and the wastewater storage pipe. An inlet valve and a reflux valve are fixedly connected to the upper and lower sides of the detection chamber near the wastewater storage pipe, respectively. A material conveying hose is fixedly connected to the end of the inlet valve away from the detection chamber. The other end of the material conveying hose is connected to the sampling component. A reflux pipe is fixedly connected to the end of the reflux valve away from the detection chamber.

[0008] As a further technical solution of the present invention, the sampling assembly includes a sampling tube and a pressure reducing chamber fixedly connected to the top of the sampling tube. A water pump is installed on the sampling tube, a filter screen is installed at the bottom of the sampling tube, a main shaft is movably installed through the middle of the pressure reducing chamber, an impeller is fixedly installed on the outer side of the main shaft inside the pressure reducing chamber, the top of the pressure reducing chamber is connected to the conveying hose, and the outer side of the pressure reducing chamber is connected to the mounting frame.

[0009] As a further technical solution of the present invention, the power assembly includes a first connecting rod, a second connecting rod, and a movable plate. One end of the first connecting rod is connected to one end of the main shaft extending out of the decompression chamber. The other end of the first connecting rod is movably connected to the second connecting rod via a rotating shaft. Both the front and rear sides of the movable plate away from the detection assembly are equipped with linkage shaft brackets. The end of the second connecting rod away from the first connecting rod is movably connected to the linkage shaft bracket. A power rod is installed at the end of the movable plate near the detection assembly. The power rod passes through the end of the detection chamber and is connected to the extension rod.

[0010] As a further technical solution of the present invention, both the upper and lower ends of the movable plate are equipped with extension ear plates located on the inner side of the mounting frame. The extension ear plates are movably sleeved with a limiting rod. The top of the mounting frame near the sampling component has a fully penetrating limiting groove. The outer side of the limiting rod is fixedly sleeved with a limiting protrusion. The limiting rod can move up and down relative to the extension ear plates. The shapes of the limiting rod and the limiting protrusion are adapted to the limiting groove and can be locked into the limiting groove to lock the position of the movable plate.

[0011] As a further technical solution of the present invention, when the limiting rod and the limiting protrusion are engaged in the limiting groove, the device is in a detection and locking state, the movable plate is locked on the side close to the sampling component, the scraping ring is located at the end of the inner side wall of the detection chamber, the sealing plate is engaged to block the sealing port, the main shaft and the impeller remain stationary, and the fluid impacts the stationary impeller to form pressure reduction damping.

[0012] As a further technical solution of the present invention, when the limiting rod and the limiting protrusion are disengaged from the limiting groove, the device is in a self-cleaning state. The impeller is driven to rotate by the fluid, and the movable plate is driven to reciprocate through the first connecting rod and the second connecting rod. The scraping ring reciprocates along the inner wall of the detection chamber, and the sealing plate moves back and forth to intermittently open the sealing port.

[0013] As a further technical solution of the present invention, multiple installation chambers are installed axially at equal intervals on the middle of the outer side of the detection chamber. Sensors are installed inside the installation chambers. A threaded sealing plug is installed at the end of the installation chamber away from the detection chamber. The number of sensors is three, namely a high-temperature resistant pH electrode, a refractometer prism, and a temperature sensor.

[0014] As a further technical solution of the present invention, the bottom of the sewage storage pipe is connected to a drain valve.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention transforms traditional fluid transport components into functional "fluid dampers" through a power component locking mechanism. In the detection state, the impeller is physically locked to prevent rotation. When high-viscosity, high-pressure emulsion explosive fluid enters the depressurization chamber, it is forced to impact the stationary impeller blades. This impact causes significant local head loss, converting the unstable kinetic energy in the fluid into heat energy for dissipation. This achieves substantial pressure reduction and rectification before entering the detection chamber. This passive depressurization method does not require additional electronic control valves, has a simple structure, and is inherently safe. The fluid entering the detection chamber after this process has a significantly reduced Reynolds number, and the flow state changes from turbulent to laminar. Pressure fluctuations are greatly reduced. For the pH electrode and refractometer prism, this means that their sensing interface is in contact with a nearly static, bubble-free, and constant-pressure medium environment. This environment greatly improves the signal-to-noise ratio of the sensor in capturing weak electrochemical signals (pH value) and optical refractive index signals (concentration), ensuring laboratory-level detection accuracy even in industrial online environments and effectively preventing production formula misadjustments caused by fluid fluctuations.

[0017] 2. This invention, when cleaning is required, simply unlocks the limit mechanism, transforming the previously obstructed impeller into a hydraulic motor. The fluid flow drives the crank-connecting rod mechanism, converting rotational motion into powerful axial reciprocating linear motion. This design eliminates the need for traditional explosion-proof motors, reducers, and complex electrical control systems, reducing equipment costs and eliminating the safety hazard of electrical sparks igniting emulsion explosives. The scraping ring component connected to the end of the connecting rod can perform high-frequency physical scraping of the inner wall of the detection chamber and the surface of the sensor probe through mechanical hard contact. For easily crystallizing and highly hard deposits like ammonium nitrate, physical scraping is far more effective than simple fluid flushing. The self-circulating mode, which instantly acquires energy and performs work, gives the device strong environmental adaptability. It has cleaning capabilities whenever fluid is sampled, ensuring the sensor remains clean and sensitive for extended periods, significantly extending maintenance cycles.

[0018] 3. This invention connects the power rod not only to the cleaning scraper ring but also to a sealing plate controlling the drain outlet. In the detection state, mechanical locking ensures the power rod is in its extreme position. At this time, the sealing plate geometrically seals the drain outlet, creating a closed dead cavity in the detection chamber. This prevents the sampled fluid from leaking into the sewage pipe, ensuring the purity of the reagent entering the return pipe and avoiding waste. Once switched to cleaning mode, the displacement of the power rod, while driving the scraper to remove crystals, simultaneously pushes open the sealing plate. This ensures that the drain channel is only opened during cleaning, allowing the scraped high-concentration crystal debris and sewage to immediately enter the sewage storage pipe and be discharged under pressure and gravity, without remaining in the detection chamber or contaminating the fresh reagent. This simplifies the operation process and, from a structural principle perspective, ensures that "detection is detection, and discharge is discharge," effectively preventing waste of emulsion explosive raw materials or environmental pollution due to misoperation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a partial cross-sectional schematic diagram of the detection component structure of the present invention;

[0021] Figure 3 This is a side sectional view of the structure of the detection component of the present invention;

[0022] Figure 4 This is a mid-section view of the structure of the detection component of the present invention;

[0023] Figure 5 This is a separate cross-sectional schematic diagram of the sampling component structure of the present invention;

[0024] Figure 6 This is an exploded view of the power assembly and mounting frame structure of the present invention;

[0025] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point A;

[0026] Figure 8 This is a separate schematic diagram of the power component structure of the present invention.

[0027] In the diagram: 1. Detection assembly; 101. Detection chamber; 102. Inlet valve; 103. Return valve; 104. Sealing port; 105. Sewage storage pipe; 106. Drain valve; 107. Installation chamber; 108. Sensor; 109. Threaded sealing plug; 2. Sampling assembly; 201. Sampling tube; 202. Water pump; 203. Pressure reducing chamber; 204. Main shaft; 205. Impeller; 3. Power assembly; 301. First connecting rod; 302. Second connecting rod; 303. Movable plate; 304. Linkage shaft bracket; 305. Extension ear plate; 306. Power rod; 4. Mounting bracket; 5. Limiting groove; 6. Limiting rod; 7. Limiting protrusion; 8. Extension rod; 9. Sealing plate; 10. Scraper ring; 11. Material conveying hose; 12. Return pipe. Detailed Implementation

[0028] like Figures 1 to 8 As shown in the embodiment of the present invention, the anti-crystallization self-circulating sampling device for emulsion explosive production includes a detection component 1. The core of the detection component 1 is a cylindrical detection chamber 101, which is made of corrosion-resistant stainless steel to adapt to the chemical properties of the emulsion explosive. Mounting brackets 4 are welded to the upper and lower ends of the left side of the detection chamber 101 for overall support. A wastewater storage pipe 105 is fixedly connected to the right end of the detection chamber 101 (the end furthest from the mounting bracket 4) for collecting cleaning wastewater. A circular sealing port 104 is opened inside the connection between the detection chamber 101 and the wastewater storage pipe 105 as a sewage discharge channel. Three key interfaces are provided on the side wall of the detection chamber 101: an inlet valve 102 on the upper left, connected to a feed hose 11; a return valve 103 on the lower left, connected to a return pipe 12; and three mounting chambers 107 are arranged axially at equal intervals in the middle. These three mounting chambers 107 respectively install a high-temperature resistant pH electrode, an ammonium nitrate concentration refractometer prism, and a temperature sensor (collectively referred to as sensor 108). Each installation compartment 107 is equipped with a threaded sealing plug 109 at its end for easy sensor replacement and maintenance.

[0029] Before sampling and testing the emulsion explosive, the device is installed above the emulsion explosive storage tank using an external frame, and the input end of the sampling component 2 is inserted below the surface of the emulsion explosive liquid to ensure timely extraction of the emulsion explosive. The device is then connected to an external power source to complete the preparation work.

[0030] like Figure 1 and Figure 2 as well as Figure 5As shown, the sampling component 2 is located on the left side of the device. It includes a sampling tube 201 inserted into the bottom of the emulsion explosive storage tank. A water pump 202 is installed inside the tube. The top of the sampling tube 201 is connected to a circular pressure-reducing chamber 203. The outlet of the pressure-reducing chamber 203 is connected to the inlet valve 102 of the detection chamber 101 through a material conveying hose 11. Inside the pressure-reducing chamber 203, a main shaft 204 is inserted laterally. An impeller 205 that is rotated by fluid impact is fixed on the main shaft. One end of the main shaft 204 extending out of the pressure-reducing chamber is connected to the power component 3.

[0031] Before locking, the operator can visually inspect or manually fine-tune the sampling component 2, or use the impact force of the fluid itself. When the moving plate 303 is observed to move to the leftmost limit position (at which point the speed is 0 and it is at the dead point), the limit rod 6 is quickly inserted to complete the locking. Since the linkage mechanism experiences the least force at the dead point position, it is easy to lock.

[0032] When sampling emulsion explosives, the water pump 202 can be turned on to generate negative pressure in the emulsion explosive fluid, and the fluid is sucked into the interior of the pressure reducing chamber 203 through the sampling pipe 201, and discharged through the material conveying hose 11 at the top of the pressure reducing chamber 203. At this time, the fluid can enter the interior of the detection chamber 101. After the detection is completed, the valve of the return pipe 12 is opened to return the detected fluid to the interior of the emulsion explosive storage tank, thus completing the cyclic sampling process.

[0033] like Figure 1 and Figure 2 as well as Figure 3 and Figure 4 As shown, installation chambers 107 are installed axially at equal intervals on the middle of the outer side of the detection chamber 101. Sensors 108 are installed inside each installation chamber 107. Threaded sealing plugs 109 for sealing the installation chamber 107 are installed at the end of each installation chamber 107 away from the detection chamber 101. There are three sensors 108, namely a high-temperature resistant pH electrode for monitoring the pH value of the aqueous phase, a refractometer prism for monitoring the concentration of ammonium nitrate, and a temperature sensor for temperature compensation and crystallization point calculation.

[0034] Example: In the initial state, i.e., when the device is in the detection state, the power component 3 is locked. When the emulsion explosive fluid passes through the depressurization chamber 203, it continuously impacts the impeller 205. Because the power component 3 is locked, the impeller 205 cannot rotate. The fluid consumes energy when impacting the impeller 205, completing the continuous depressurization. The depressurized fluid enters the interior of the detection chamber 101 through the inlet valve 102, and the return pipe 12 is kept closed until the fluid fills the interior of the detection chamber 101. At this time, the fluid cannot continue to be injected into the interior of the detection chamber 101, and because of the depressurization of the fluid, the fluid is in a relatively constant state with small fluid fluctuations. The aqueous phase pH value, ammonium nitrate concentration, and temperature data of the fluid are detected by three different sensors 108 respectively. At this time, the fluid is in a physically isolated static state, with no flow, no bubbles, and no pressure fluctuations, completing the data detection process.

[0035] During this process, since the sealing plate 9 and the sealing port 104 are in a sealed state, the fluid can only exist inside the detection chamber 101 and will not enter the sewage storage pipe 105. At the same time, the threaded sealing plug 109 can be unscrewed as needed to replace or repair the sensor 108. It is not limited to the detection of the above-mentioned parameters, but can also complete the detection of other parameters by replacing the sensor 108.

[0036] By utilizing the cooperation between sampling component 2 and power component 3, specifically by using the power component 3 in a locked state and the sampling process of sampling component 2, the fluid drawn in by negative pressure is introduced into the interior of sampling component 2. The impeller 205 is locked by the power component 3 in a locked state, thereby consuming fluid energy and continuously reducing the pressure on the fluid. This makes the fluid entering the detection chamber 101 tend to be stable, and multiple sensors 108 quickly detect the fluid parameters, avoiding the problem of parameter fluctuations that are easily caused by traditional fluid flow detection methods, and improving the overall detection accuracy.

[0037] Specifically, when the device is in the detection lockout state, the stationary impeller acts as a damping element, and its pressure reduction and flow stabilization effect follows the principle of local resistance loss in fluid mechanics. When the fluid flows through the throttling gap between the stationary impeller blades and the inner wall of the pressure reduction chamber, its pressure drop... The relationship between flow rate and velocity conforms to the following formula:

[0038] ;

[0039] The pressure difference of the fluid before and after passing through the pressure reduction chamber;

[0040] The local drag coefficient is determined by the impeller blade geometry and throttling clearance (in this embodiment, it is set by adjusting the clearance between the impeller and the inner wall). To achieve strong damping);

[0041] The density of the emulsion explosive matrix;

[0042] The average flow velocity of the fluid before it enters the depressurization chamber.

[0043] Meanwhile, to ensure that the fluid entering the detection chamber changes from turbulent to laminar flow to suit sensor detection, this device limits the Reynolds number (Re) of the fluid through damping:

[0044] ;

[0045] in, The dynamic viscosity of the emulsion explosive. The equivalent hydraulic diameter is given. Through calculation using the above formula and structural constraints, this device forcibly converts the high-speed pulsating fluid (Re>4000) entering the detection chamber into a low-speed laminar flow fluid (Re<2000), thereby eliminating the interference of flow velocity fluctuations on the pH electrode potential difference.

[0046] like Figure 1 and Figure 2 as well as Figure 6 and Figure 8 As shown, the power assembly 3 adopts the crank-connecting rod mechanism principle. The main shaft 204 is connected to the first connecting rod 301 (crank), and the first connecting rod 301 is hinged to the second connecting rod 302. The second connecting rod 302 is connected to a sliding movable plate 303 through the linkage shaft bracket 304. A long power rod 306 is connected to the front end of the movable plate 303. This power rod 306 extends to the right into the detection chamber 101, and two key components are fixed to the rod in sequence: one is a scraping ring 10 located in the sensor area, and the other is a sealing plate 9 located at the end of the rod.

[0047] Locking and self-locking mechanism: To control the switching between "detection" and "cleaning" modes, a limiting groove 5 is provided on the top of the mounting bracket 4. A limiting rod 6 that can move up and down is sleeved inside the extension ear plate 305 above the movable plate 303. The limiting rod 6 has a limiting protrusion 7.

[0048] Detection mode: When the limit rod 6 is inserted into the limit groove 5, the movable plate 303 is locked in the leftmost position. At this time, the power rod 306 is pulled to the left, so that the sealing plate 9 is tightly stuck on the sealing port 104, completely blocking the sewage discharge channel; at the same time, the impeller 205 cannot rotate because the linkage mechanism is locked, which plays a role in damping and pressure reduction.

[0049] Cleaning mode: Pull out the limit rod 6, the impeller 205 rotates, and the drive rod 306 reciprocates left and right. The scraping ring 10 scrapes away the crystals on the sensor surface, and at the same time, the sealing plate 9 moves away from the sealing port 104 with the rod, opening the sewage discharge channel.

[0050] The scraper ring 10 is not a completely sealed piston; its surface has multiple flow holes, and the outer edge of the scraper ring 10 is designed with barbed scrapers that are inclined towards the discharge direction. When moving to the right (discharge direction), the scraper scrapes against the inner wall to remove crystals. When moving to the left (reset), fluid can pass through the flow holes, and the back of the scraper reduces the pushing force on impurities. Combined with the negative pressure difference generated at the opened sealing port 104, this ensures that impurities are effectively sucked out.

[0051] Example: After a period of detection, crystals form at the detection ends of multiple sensors 108, affecting the detection accuracy. At this time, the device can be switched to self-cleaning mode, that is, the limiting rod 6 is rotated so that the limiting protrusion 7 corresponds to the limiting groove 5, and the limiting rod 6 is dislodged from the limiting groove 5, so that the upper and lower limiting rods 6 are no longer inserted into the inside of the limiting groove 5. At this time, the power component 3 can be unlocked. As the fluid continues to enter the inside of the pressure reducing chamber 203, the fluid impacts the impeller 205, and the impeller 205 rotates accordingly, driving the main shaft 204 to rotate continuously.

[0052] At this time, the first connecting rod 301 rotates and drives the second connecting rod 302 to swing, and applies pushing and pulling forces to the movable plate 303. The power rod 306 moves closer to the detection component 1 and simultaneously drives the scraping ring 10, the extension rod 8, and the sealing plate 9 to move to the right. At this time, the sealing plate 9 no longer seals the sealing port 104 and enters the interior of the sewage storage pipe 105. The scraping ring 10 moves relative to the inner wall of the detection chamber 101 and performs friction cleaning on the inner wall of the detection chamber 101 and the detection ends of multiple sensors 108. The cleaned sewage enters the interior of the sewage storage pipe 105 through the sealing port 104 and is finally discharged through the drain valve 106. During this process, the return valve 103 is in a normally closed state. As the impeller 205 continues to rotate, the scraping ring 10 moves back and forth, continuously cleaning the inner wall of the detection chamber 101 and the detection ends of the sensors 108 until the cleaning is completed and the detection chamber 101 and the sewage storage pipe 105 are emptied, completing the self-cleaning process.

[0053] By cooperating with the sampling component 2, the power component 3, the scraper ring 10, the sealing plate 9, and the detection component 1, the device can switch from the detection state to the self-cleaning state simply by unlocking the power component 3. Fluid energy is converted into the reciprocating movement of the scraper ring 10 through the power component 3, thereby achieving active cleaning of the inner wall of the detection chamber 101 and the sensor 108. Through the cooperation between the sealing plate 9 and the sealing port 104, friction cleaning is achieved while automatically draining wastewater, reducing the impact of crystallization on detection accuracy. Moreover, no downtime maintenance is required, thus improving maintenance efficiency.

[0054] In self-cleaning mode, the kinetic energy of the fluid is converted into mechanical energy to drive the scraper ring. The relationship between the theoretical shaft power N obtained by the impeller and the fluid parameters is as follows:

[0055] ;

[0056] At this point, the axial thrust applied to the scraper ring is converted by the crank-connecting rod mechanism. satisfy:

[0057] ;

[0058] Where: Q is the flow rate in the sampling tube;

[0059] H represents the effective head;

[0060] T is the output torque of the impeller shaft;

[0061] L is the crank length;

[0062] The crank angle;

[0063] For mechanical transmission efficiency.

[0064] Actual calculations show that, at a conventional emulsion explosive production flow rate (1.5 m / s), this device can generate an axial thrust of no less than 150 N. This thrust is much greater than the shearing force (approximately 30-50 N) required to remove a 0.5 mm thick ammonium nitrate crystal layer, thus ensuring the reliability of physical scraping.

[0065] Working principle and usage process:

[0066] First, fix the device to the storage tank or conveying pipeline of the emulsion explosive production line using the mounting bracket. Insert the filter screen at the bottom of the sampling tube 201 in the sampling component below the surface of the emulsion explosive liquid to ensure complete immersion. Connect the return pipe 12 to the storage tank or return circuit. Install the sensors in the detection component into the corresponding installation chambers 107 and tighten the threaded sealing plugs 109. At this time, ensure that the limit rod 6 is inserted into the limit groove 5 so that the power component 3 is in a mechanically locked state, that is, the impeller 205 cannot rotate.

[0067] The water pump 202 in the sampling assembly is started. The water pump 202 generates negative pressure in the sampling tube 201, which draws in the emulsion explosive fluid and forces it into the depressurization chamber 203.

[0068] The fluid flows in the pressure reducing chamber 203 and impacts the impeller 205. Since the limiting rod 6 is stuck in the limiting groove 5 at this time, the movable plate 303 is locked by the extended ear plate 305, and then the main shaft 204 is locked by the second connecting rod 302 and the first connecting rod 301. Therefore, the impeller 205 remains stationary.

[0069] The high-speed flowing fluid impacts the stationary impeller 205, forcibly consuming the fluid's kinetic and pressure potential energy, generating a throttling effect. This process eliminates turbulence and pressure pulsation in the fluid, achieving physical pressure reduction and flow stabilization.

[0070] After pressure reduction and flow stabilization, the fluid flows smoothly into the detection chamber 101 through the feed hose 11 and the inlet valve 102. At this time, the return valve 103 is closed to allow the fluid to fill the detection chamber 101.

[0071] Since the fluid is in a quasi-static state with low pressure and low flow rate, and the sealing plate 9 tightly blocks the sealing port 104, the fluid will not enter the sewage storage pipe 105. At this time, the three sensors in the installation chamber 107 can accurately read the pH value, concentration and temperature data of the fluid, avoiding flow rate interference.

[0072] When crystals appear on the sensor surface due to prolonged operation or when routine maintenance is required, the operator rotates and pulls out the limit rod 6 to disengage it from the limit groove 5, at which point the power assembly 3 is unlocked.

[0073] The fluid continues to flow through the pressure reducing chamber 203 and impacts the impeller 205. Due to the loss of mechanical locking, the impeller 205 begins to rotate at high speed under the action of fluid power, driving the main shaft 204 to rotate.

[0074] The rotation of the main shaft 204 drives the first connecting rod 301 to perform circular motion, which in turn drives the second connecting rod 302 to swing. Through the transmission of the linkage shaft bracket 304, the rotational motion is converted into the axial reciprocating linear motion of the movable plate 303.

[0075] The movable plate 303 pushes the power rod 306 to reciprocate left and right within the detection chamber 101;

[0076] Scraping ring cleaning: The power rod 306 drives the scraping ring 10 to repeatedly scrape the inner wall of the detection chamber 101 and the surface of the sensor probe to physically remove the attached ammonium nitrate crystals and dirt;

[0077] Sewage discharge is activated: At the same time, the power rod 306 drives the sealing plate 9 to move to the right, and the sealing port 104 is opened;

[0078] The scraped-off crystals and turbid cleaning fluid enter the wastewater storage pipe 105 through the open sealing port 104, and are finally discharged from the device by opening the drain valve 106. After cleaning is completed, the limit rod 6 is locked again, and the device returns to the detection state.

Claims

1. A self-circulating sampling device for preventing crystallization in the production of emulsion explosives, comprising a detection component (1), characterized in that: Mounting brackets (4) are installed at both the upper and lower ends of the left side of the detection component (1). A sampling component (2) is provided on the left side of the detection component (1). The outer side of the sampling component (2) is connected to the mounting bracket (4). A power component (3) is installed on the outer side of the sampling component (2). An extension rod (8) extending into the inside of the detection component (1) is connected to the side of the power component (3) near the detection component (1). A scraping ring (10) is fixedly sleeved on the outer side of the extension rod (8) inside the detection component (1). A sealing plate (9) is fixedly installed at the end of the extension rod (8) away from the power component (3). The power component (3) is used to convert the kinetic energy of the fluid in the sampling component (2) into power to drive the extension rod (8), scraping ring (10) and sealing plate (9) to perform axial reciprocating motion.

2. The anti-crystallization self-circulating sampling device for emulsion explosive production according to claim 1, characterized in that: The detection component (1) includes a detection chamber (101). The outer side of the detection chamber (101) is connected to the mounting frame (4). A sewage storage pipe (105) is fixedly connected to one end of the detection chamber (101) away from the mounting frame (4). A sealing port (104) is provided at the connection between the detection chamber (101) and the sewage storage pipe (105). An inlet valve (102) and a return valve (103) are fixedly connected to the upper and lower sides of the detection chamber (101) near the sewage storage pipe (105), respectively. A material conveying hose (11) is fixedly connected to one end of the inlet valve (102) away from the detection chamber (101). The other end of the material conveying hose (11) is connected to the sampling component (2). A return pipe (12) is fixedly connected to one end of the return valve (103) away from the detection chamber (101).

3. The anti-crystallization self-circulating sampling device for emulsion explosive production according to claim 2, characterized in that: The sampling assembly (2) includes a sampling tube (201) and a pressure reducing chamber (203) fixedly connected to the top of the sampling tube (201). A water pump (202) is installed on the sampling tube (201). A filter screen is installed at the bottom of the sampling tube (201). A main shaft (204) is movably installed through the middle of the pressure reducing chamber (203). An impeller (205) is fixedly installed on the outer side of the main shaft (204) inside the pressure reducing chamber (203). The top of the pressure reducing chamber (203) is connected to the conveying hose (11). The outer side of the pressure reducing chamber (203) is connected to the mounting frame (4).

4. The anti-crystallization self-circulating sampling device for emulsion explosive production according to claim 3, characterized in that: The power assembly (3) includes a first connecting rod (301), a second connecting rod (302), and a movable plate (303). One end of the first connecting rod (301) is connected to one end of the main shaft (204) extending out of the pressure chamber (203). The other end of the first connecting rod (301) is movably connected to the second connecting rod (302) via a rotating shaft. Both the front and rear sides of the movable plate (303) away from the detection assembly (1) are equipped with linkage shaft brackets (304). The end of the second connecting rod (302) away from the first connecting rod (301) is movably connected to the linkage shaft brackets (304). A power rod (306) is installed on the end of the movable plate (303) close to the detection assembly (1). The power rod (306) passes through the end of the detection chamber (101) and is connected to the extension rod (8).

5. The anti-crystallization self-circulating sampling device for emulsion explosive production according to claim 4, characterized in that: Both ends of the movable plate (303) are equipped with extension ear plates (305) located on the inner side of the mounting frame (4). The extension ear plate (305) is movably sleeved with a limiting rod (6). The top of the mounting frame (4) near the sampling component (2) is provided with a fully penetrating limiting groove (5). The outer side of the limiting rod (6) is fixedly sleeved with a limiting protrusion (7). The limiting rod (6) can move up and down relative to the extension ear plate (305). The shape of the limiting rod (6) and the limiting protrusion (7) are adapted to the limiting groove (5) and can be locked into the limiting groove (5) to lock the position of the movable plate (303).

6. The anti-crystallization self-circulating sampling device for emulsion explosive production according to claim 5, characterized in that: When the limiting rod (6) and the limiting protrusion (7) are engaged in the limiting groove (5), the device is in a detection and locking state. The movable plate (303) is locked on the side close to the sampling component (2). The scraping ring (10) is located at the end of the inner wall of the detection chamber (101). The sealing plate (9) is engaged to block the sealing port (104). The main shaft (204) and the impeller (205) remain stationary. The fluid impacts the stationary impeller (205) to form pressure reduction damping.

7. The anti-crystallization self-circulating sampling device for emulsion explosive production according to claim 5, characterized in that: When the limiting rod (6) and the limiting protrusion (7) disengage from the limiting groove (5), the device is in a self-cleaning state. The impeller (205) is driven to rotate by the fluid and drives the movable plate (303) to reciprocate through the first connecting rod (301) and the second connecting rod (302). The scraping ring (10) reciprocates along the inner wall of the detection chamber (101), and the sealing plate (9) moves back and forth to intermittently open the sealing port (104).

8. The anti-crystallization self-circulating sampling device for emulsion explosive production according to claim 2, characterized in that: Multiple mounting chambers (107) are installed axially at equal intervals on the middle of the outer side of the detection chamber (101). Sensors (108) are installed inside the mounting chambers (107). A threaded sealing plug (109) is installed at the end of the mounting chamber (107) away from the detection chamber (101). There are three sensors (108), namely a high-temperature resistant pH electrode, a refractometer prism, and a temperature sensor.

9. The anti-crystallization self-circulating sampling device for emulsion explosive production according to claim 2, characterized in that: The bottom of the sewage storage pipe (105) is connected to a drain valve (106).

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