Self-circulating cooling chemical pump

Abstract

This invention discloses a self-circulating cooling chemical pump, belonging to the field of chemical pump technology. It includes a main body mechanism for transporting chemical liquids, with a lubrication mechanism for pump lubrication and a heat dissipation mechanism for pump cooling. This invention directly couples the heat dissipation path of the main heat source with the pumped medium. The heat generated by the heating components is efficiently conducted to the pump casing through a heat-conducting copper sleeve and heat-conducting pipe, and then continuously carried away by the chemicals flowing through the pump casing, ensuring the magnetic transmission efficiency and operational stability of the pump under long-term high-load conditions. This invention continuously pumps lubricating oil to each key dynamic sealing surface, forming a stable lubricating oil film, significantly reducing wear. The system utilizes the preload force of the pressure rod spring and the inner clamping spring; when the thickness of the sealing ring decreases due to long-term wear, the spring automatically rebounds, pushing the movable sealing ring or movable seal ring to move axially, always tightly fitting the corresponding static sealing surface.

Description

Technical Field

[0001] This invention relates to the field of chemical pump technology, and in particular to a self-circulating cooling chemical pump. Background Technology

[0002] Chemical pumps, as key equipment for conveying various chemical liquids, are widely used in petroleum, chemical, pharmaceutical, and metallurgical industries. Because the media they transport often possess corrosive, toxic, flammable, explosive, or high-temperature and high-pressure characteristics, extremely high requirements are placed on the reliability, sealing, and operational stability of the pumps. Among the many types of chemical pumps, magnetically driven pumps, due to their static sealing structure, fundamentally eliminate the risk of shaft seal leakage, making them the preferred choice for conveying hazardous and valuable chemicals. However, existing magnetically driven chemical pumps still face some technical problems that urgently need to be solved during long-term operation.

[0003] First, the core drive components of a magnetic pump generate eddy current losses and hysteresis losses during operation, leading to heat generation. Especially when conveying media under high load, if the heat cannot be dissipated in time, the temperature of the isolation sleeve and internal magnets will continue to rise. This will not only reduce the magnetic properties of the magnets, but may also cause demagnetization in severe cases, making the pump unable to work properly. At the same time, overheating will also accelerate the aging of sealing components and lubricants, affecting the service life of the pump. Traditional heat dissipation methods mainly rely on natural convection outside the pump casing or the addition of external cooling systems such as air cooling and water cooling. Natural heat dissipation efficiency is low and it is difficult to cope with high heat conditions, while external cooling systems increase the complexity of the structure, energy consumption, and potential risks caused by leakage in the cooling pipes.

[0004] Secondly, there is the issue of lubrication and wear compensation at the dynamic seals. Although magnetic pumps eliminate the shaft seal that is in direct contact with the medium, bearings and internal seals are still required between the pump casing and the main shaft to support the main shaft. These relatively moving friction pairs require reliable lubrication to reduce wear. Existing lubrication solutions mostly use passive oil immersion or rely on the medium's own lubrication, resulting in unstable lubrication effects and an inability to automatically compensate for the wear of the seals. As operating time accumulates, the sealing gap increases due to wear, which may lead to increased internal leakage, decreased pump efficiency, or even minor leakage. The lack of an automatic wear compensation mechanism is a common shortcoming affecting the long-term sealing reliability of chemical pumps.

[0005] Secondly, some pumps are equipped with independent fans or cooling circulation systems for forced heat dissipation. These systems are usually directly driven by motors or mechanically linked to the main shaft. Regardless of the actual temperature of the pump body, the cooling system works continuously as long as the pump is running, resulting in unnecessary energy consumption. During the pump start-up phase or under low-temperature conditions, this kind of heat dissipation is redundant. An efficient heat dissipation mechanism that can be automatically triggered and started on demand according to the actual temperature of the pump body is of great significance for improving the energy efficiency and adaptability of the equipment.

[0006] Therefore, there is an urgent need for an improved solution for chemical pumps, especially magnetically driven chemical pumps, which aims to efficiently utilize the medium being pumped for basic heat dissipation and integrate an autonomous, reliable, and sustainable lubrication system. This lubrication system needs to have an automatic compensation function for wear of key seals. At the same time, it also needs to be equipped with an intelligent triggering and on-demand active heat dissipation mechanism to form a multi-level, high-efficiency, and intelligent thermal management and sealing lubrication system, thereby comprehensively improving the operational reliability, energy efficiency, and service life of chemical pumps under harsh operating conditions. Summary of the Invention

[0007] To address the aforementioned technical problems, the present invention adopts the following technical solution: a self-circulating cooling chemical pump, comprising a main body mechanism for conveying chemical liquids, the main body mechanism including a pump casing, and the main body mechanism being provided with a lubrication mechanism for lubricating the pump and a heat dissipation mechanism for dissipating heat from the pump.

[0008] The main structure includes a heat dissipation shell fixedly installed on the outside of the pump casing, a front end cylinder fixedly installed on the pump casing, a rear heat dissipation shell fixedly installed on the heat dissipation shell, a main shaft rotatably installed inside the rear heat dissipation shell, the main shaft passing through the heat dissipation shell, the pump casing and the front end cylinder, and multiple heat dissipation fins provided on the heat dissipation shell, with the main shaft rotatably installed with the heat dissipation shell.

[0009] Furthermore, the main body also includes an inlet pipe and an outlet pipe fixedly installed on the pump casing. The inlet pipe and the outlet pipe are respectively connected to the chemical delivery pipeline. A centrifugal impeller is fixedly installed on the main shaft and is located in the pump casing.

[0010] Furthermore, the main body mechanism also includes an inner cylinder fixedly mounted on the main shaft, with multiple magnets installed on the inner cylinder, a heat-conducting copper sleeve fixedly mounted inside the heat dissipation shell, multiple heat-conducting pipes installed inside the heat-conducting copper sleeve, the ends of the heat-conducting pipes and the heat-conducting copper sleeve contacting the pump housing, a coil fixedly mounted inside the heat-conducting copper sleeve, and the inner cylinder and magnets located inside the coil.

[0011] When the coil is energized, it drives the magnet, inner cylinder, and main shaft to rotate via electromagnetism. The main shaft drives the centrifugal impeller to rotate, drawing the chemicals in through the inlet pipe and discharging them through the outlet pipe. The magnet and coil generate heat, which is conducted to the heat-conducting copper sleeve. The heat is then conducted to the pump casing through the heat-conducting copper sleeve and heat pipe, and subsequently to the chemicals. Some of the heat is carried away by the chemicals themselves. Under normal conditions, the heat generated by the magnet and coil is small, so the temperature of the chemicals will not rise excessively.

[0012] Furthermore, the lubrication mechanism includes a lubricating fluid tank fixedly installed on the rear heat sink, an oil replenishment cap is provided on the top of the lubricating fluid tank, the lubricating fluid tank is filled with lubricating oil, and one end of the oil return pipe and the oil inlet pipe are fixedly installed on the lubricating fluid tank.

[0013] Furthermore, the lubrication mechanism also includes a drive wheel rotatably mounted on the rear heat sink, a drive belt wound around the drive wheel and the main shaft, a perforated plate fixedly mounted inside the lubricant tank, an oil delivery impeller rotatably mounted on the perforated plate, multiple holes provided on the perforated plate, a lower drive wheel fixedly mounted on the oil delivery impeller, and a lower drive belt wound around the lower drive wheel and the drive wheel.

[0014] Furthermore, the lubrication mechanism also includes a fixed ring fixedly mounted on the main shaft, a plurality of pressure rods slidably mounted on the fixed ring, pressure rings fixedly mounted on the pressure rods, a pressure rod spring between the pressure rings and the fixed ring, an inner sealing ring fixedly mounted inside the front end cylinder, the main shaft and the inner sealing ring being rotatably mounted, a movable sealing ring being slidably mounted on the main shaft along the axial direction, and the pressure rod spring being in a compressed state, so that the movable sealing ring is tightly attached to the inner sealing ring.

[0015] Furthermore, the lubrication mechanism also includes an inner fixed ring fixedly mounted on the main shaft, a plurality of inner clamping columns slidably mounted on the inner fixed ring, a clamping ring fixedly mounted on the inner clamping columns, an inner clamping spring provided between the clamping ring and the inner fixed ring, an inner sealing ring fixedly mounted inside the pump housing, the main shaft and the inner sealing ring rotatably mounted, a movable sealing ring slidably mounted on the main shaft along the axial direction, and the inner clamping spring being in a compressed state, so that the movable sealing ring is tightly attached to the inner sealing ring.

[0016] Furthermore, the lubrication mechanism also includes an annular inner lubrication cavity disposed within the pump housing, an annular inner lubrication ring disposed within the front end cylinder, the other end of the oil inlet pipe being connected to the upper end of the inner lubrication cavity, one end of a connecting pipe being connected to the lower end of the inner lubrication cavity, the other end of the connecting pipe being connected to one end of the inner lubrication ring, and the other end of the inner lubrication ring being connected to the other end of the return oil pipe.

[0017] The main shaft and the front end cylinder are sealed by a movable sealing ring and an inner sealing ring, and the pump casing is sealed by a movable sealing ring and an inner sealing ring to prevent leakage of the conveyed chemicals. When the main shaft rotates, the movable sealing ring rotates relative to the inner sealing ring, and the movable sealing ring rotates relative to the inner sealing ring. The main shaft drives the drive wheel to rotate via a drive belt, and the drive wheel drives the lower drive wheel and the oil delivery impeller to rotate via a lower drive belt. The oil delivery impeller delivers the lubricating oil in the lubricating tank out through the oil inlet pipe. The lubricating oil in the oil inlet pipe then enters the inner lubrication chamber, which is filled with lubricating oil. The lubricating oil in the inner lubrication chamber lubricates the movable sealing ring and the inner sealing ring. Then, the lubricating oil enters the inner lubrication ring through the connecting pipe, which is filled with lubricating oil. The lubricating oil in the inner lubrication ring lubricates the movable sealing ring and the inner sealing ring.

[0018] As the movable sealing ring rotates relative to the inner sealing ring, and the movable sealing ring rotates relative to the inner sealing ring, wear will occur on the movable sealing ring. When the movable sealing ring or the movable sealing ring is worn, the pressure rod spring or the inner clamping spring rebounds, causing the pressure ring or the inner clamping column to push the movable sealing ring or the movable sealing ring outward, so that the movable sealing ring is always in close contact with the inner sealing ring, ensuring the reliability of the seal.

[0019] Furthermore, the heat dissipation mechanism includes a heat dissipation shell fixedly installed on the rear heat dissipation shell, a plurality of heat dissipation fins are provided on the rear heat dissipation shell, a heat dissipation impeller is rotatably installed inside the heat dissipation shell, and a plurality of ventilation holes are provided on the heat dissipation shell.

[0020] Furthermore, the heat dissipation mechanism also includes a fixing bar fixedly installed at the end of the main shaft, a friction disc slidably installed on the main shaft, a return spring provided between the friction disc and the fixing bar, textures provided on the friction disc to increase friction, an expansion cylinder provided inside the rear heat dissipation shell, an outer pusher mounted slidably inside the expansion cylinder, a top wheel rotatably installed on the outer pusher, the top wheel contacting the friction disc, and the expansion cylinder filled with gas that expands when heated. During normal operation, the friction disc does not contact the heat dissipation impeller.

[0021] When the pump is running normally, the friction disc does not contact the cooling impeller. When the pump temperature is too high, the gas inside the expansion cylinder expands due to heat, pushing the outer pusher and top wheel outward. The rotation of the main shaft always drives the friction disc to rotate. The outward movement of the top wheel pushes the friction disc to slide outward along the main shaft, compressing the return spring. When the friction disc contacts the cooling impeller, the friction disc drives the cooling impeller to rotate through friction. The cooling impeller blows air to cool the pump. The heat sinks on the heat sink housing and the rear heat sink housing provide auxiliary cooling for the pump.

[0022] The beneficial effects of this invention compared with the prior art are: (1) This invention directly couples the heat dissipation path of the main heat source with the pumping medium. The heat generated by the heating component is efficiently conducted to the pump casing through the heat-conducting copper sleeve and heat-conducting pipe, and then continuously carried away by the chemicals flowing through the pump casing. There is no need to configure an additional complex and faulty external cooling system. This not only simplifies the structure, but also realizes the efficient and direct transfer of heat, effectively preventing the risk of the magnetic drive unit being demagnetized due to overheating, and ensuring the magnetic transmission efficiency and operational stability of the pump under long-term high-load conditions; (2) The main shaft rotation set in this invention drives the oil conveying impeller to work through belt transmission, continuously pumping lubricating oil to each key dynamic sealing surface to form a stable lubricating oil film, significantly reducing wear. The system utilizes the preload force of the pressure rod spring and the inner clamping spring. When the thickness of the sealing ring decreases due to long-term wear, The spring can automatically rebound and push the movable sealing ring or movable sealing ring to move axially, always closely fitting the corresponding static sealing surface. This automatic compensation mechanism fundamentally solves the problem of sealing performance decay caused by seal wear, realizes long-term reliable sealing with no or little maintenance, and extends the maintenance cycle and service life; (3) When the present invention is running normally or at low temperature, the friction disc is separated from the heat dissipation impeller, and the active heat dissipation does not work, realizing zero energy consumption. When the pump body temperature rises abnormally to the set threshold, the temperature sensing medium in the expansion cylinder is heated and expands, mechanically pushing the friction disc to move axially, and driving the heat dissipation impeller to rotate at high speed through friction, generating forced airflow to efficiently cool the pump body, realizing the on-demand emergency heat dissipation mode of starting when hot and stopping when cool, avoiding the energy waste caused by traditional continuous operation heat dissipation, with a high degree of intelligence and significant energy saving effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 is a schematic diagram of the internal structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the main structure of the present invention. Figure 1 .

[0026] Figure 4 This is a schematic diagram of the main structure of the present invention. Figure 2 .

[0027] Figure 5 This is a schematic diagram of the main structure of the present invention. Figure 3 .

[0028] Figure 6 This is a schematic diagram of the lubrication mechanism of the present invention. Figure 1 .

[0029] Figure 7 This is a schematic diagram of the lubrication mechanism of the present invention. Figure 2 .

[0030] Figure 8 This is a schematic diagram of the lubrication mechanism of the present invention. Figure 3 .

[0031] Figure 9 This is a schematic diagram of the lubrication mechanism of the present invention. Figure 4 .

[0032] Figure 10 for Figure 9 A magnified view of a portion of point A in the middle.

[0033] Figure 11 This is a schematic diagram of the heat dissipation mechanism of the present invention. Figure 1 .

[0034] Figure 12 This is a schematic diagram of the heat dissipation mechanism of the present invention. Figure 2 .

[0035] Figure 13 This is a schematic diagram of the heat dissipation mechanism of the present invention. Figure 3 .

[0036] Figure 14 This is a schematic diagram of the heat dissipation mechanism of the present invention. Figure 4 .

[0037] Reference numerals: 101-Pump casing; 102-Inlet pipe; 103-Outlet pipe; 104-Heat dissipation casing; 105-Main shaft; 106-Centrifugal impeller; 107-Inner cylinder; 108-Magnet; 109-Coil; 110-Heat conduction pipe; 111-Front end cylinder; 112-Heat conduction copper sleeve; 201-Lubricating fluid tank; 202-Oil replenishment cap; 203-Oil return pipe; 204-Connecting pipe; 205-Inner sealing ring; 206-Modible sealing ring; 207-Fixing ring; 208-Pressure ring; 209-Pressure rod; 210-Pressure rod spring; 211-Inner lubrication ring; 212 213-Inner lubrication chamber; 214-Inner sealing ring; 215-Modible sealing ring; 216-Pressure ring; 217-Inner fixed ring; 218-Inner pressure column; 219-Inner pressure spring; 220-Drive belt; 221-Drive wheel; 222-Lower drive belt; 223-Lower drive wheel; 224-Oil impeller; 225-Orifice plate; 301-Rear heat sink; 302-Heat sink; 303-Heat impeller; 304-Expansion cylinder; 305-Outer push frame; 306-Top wheel; 307-Friction disc; 308-Fixing strip; 309-Reset spring. Detailed Implementation

[0038] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0039] Example: Reference Figures 1-14A self-circulating cooling chemical pump includes a main body mechanism for conveying chemical liquids. The main body mechanism includes a pump casing 101 and is provided with a lubrication mechanism for lubricating the pump and a heat dissipation mechanism for cooling the pump.

[0040] The main structure includes a heat dissipation shell 104 fixedly installed on the outside of the pump housing 101, a front end cylinder 111 fixedly installed on the pump housing 101, a rear heat dissipation shell 301 fixedly installed on the heat dissipation shell 104, a main shaft 105 rotatably installed inside the rear heat dissipation shell 301, the main shaft 105 passing through the heat dissipation shell 104, the pump housing 101 and the front end cylinder 111, and multiple heat dissipation fins provided on the heat dissipation shell 104, and the main shaft 105 rotatably installed with the heat dissipation shell 104.

[0041] like Figures 3-5 As shown, the main structure also includes an inlet pipe 102 and an outlet pipe 103 fixedly installed on the pump casing 101. The inlet pipe 102 and the outlet pipe 103 are respectively connected to the chemical conveying pipeline. A centrifugal impeller 106 is fixedly installed on the main shaft 105 and is located in the pump casing 101.

[0042] like Figures 3-5 As shown, the main structure also includes an inner cylinder 107 fixedly mounted on the main shaft 105. Multiple magnets 108 are provided on the inner cylinder 107. A heat-conducting copper sleeve 112 is fixedly mounted inside the heat dissipation shell 104. Multiple heat-conducting pipes 110 are provided inside the heat-conducting copper sleeve 112. The ends of the heat-conducting pipes 110 and the heat-conducting copper sleeve 112 are in contact with the pump shell 101. A coil 109 is fixedly mounted inside the heat-conducting copper sleeve 112. The inner cylinder 107 and the magnets 108 are located inside the coil 109.

[0043] When coil 109 is energized, it drives magnet 108, inner cylinder 107, and main shaft 105 to rotate via electromagnetic induction. Main shaft 105 drives centrifugal impeller 106 to rotate, drawing chemicals in through inlet pipe 102 and discharging them through outlet pipe 103. Magnet 108 and coil 109 generate heat, which is conducted to heat-conducting copper sleeve 112. The heat is then conducted to pump housing 101 through heat-conducting copper sleeve 112 and heat-conducting pipe 110, and subsequently to the chemicals. Some of the heat is carried away by the chemicals themselves. Under normal conditions, the heat generated by magnet 108 and coil 109 is small, so the temperature of the chemicals will not rise excessively.

[0044] like Figures 6-10 As shown, the lubrication mechanism includes a lubricating fluid tank 201 fixedly installed on the rear heat sink 301. An oil replenishment cap 202 is provided on the top of the lubricating fluid tank 201. The lubricating fluid tank 201 is filled with lubricating oil. One end of the oil return pipe 203 and the oil inlet pipe 213 are fixedly installed on the lubricating fluid tank 201.

[0045] like Figures 6-10As shown, the lubrication mechanism also includes a transmission wheel 221 rotatably mounted on the rear heat sink 301. The transmission wheel 221 and the main shaft 105 are wound with a transmission belt 220. A perforated plate 225 is fixedly installed inside the lubricant tank 201. An oil conveying impeller 224 is rotatably mounted on the perforated plate 225. The perforated plate 225 is provided with multiple holes. A lower transmission wheel 223 is fixedly mounted on the oil conveying impeller 224. A lower transmission belt 222 is wound around the lower transmission wheel 223 and the transmission wheel 221.

[0046] like Figures 6-10 As shown, the lubrication mechanism also includes a fixed ring 207 fixedly mounted on the main shaft 105. Multiple pressure rods 209 are slidably mounted on the fixed ring 207. A pressure ring 208 is fixedly mounted on the pressure rod 209. The pressure ring 208 is sleeved on the outside of the main shaft 105. A pressure rod spring 210 is provided between the pressure ring 208 and the fixed ring 207. One end of the pressure rod spring 210 is fixedly mounted to the pressure ring 208, and the other end is fixedly mounted to the fixed ring 207. An inner sealing ring 205 is fixedly mounted inside the front end cylinder 111. The main shaft 105 is rotatably mounted with the inner sealing ring 205. A movable sealing ring 206 is slidably mounted on the main shaft 105 along the axial direction. Two arc-shaped grooves are symmetrically provided on the cylindrical surface of the main shaft 105, and two arc-shaped platforms are symmetrically provided on the inner ring side of the sealing ring 206. The two arc-shaped platforms of the sealing ring 206 are respectively inserted into the two arc-shaped grooves of the main shaft 105. The pressure rod spring 210 is in a compressed state, so that the movable sealing ring 206 is tightly attached to the inner sealing ring 205.

[0047] like Figures 6-10 As shown, the lubrication mechanism also includes an inner retaining ring 217 fixedly mounted on the main shaft 105. Multiple inner clamping posts 218 are slidably mounted on the inner retaining ring 217. A clamping ring 216 is fixedly mounted on each inner clamping post 218. The clamping ring 216 is sleeved on the outside of the main shaft 105. An inner clamping spring 219 is provided between the clamping ring 216 and the inner retaining ring 217. One end of the inner clamping spring 219 is fixedly mounted to the clamping ring 216, and the other end is fixedly mounted to the inner retaining ring 217. The pump housing 101 is fixedly installed with an inner sealing ring 214. The main shaft 105 is rotatably installed with the inner sealing ring 214. A movable sealing ring 215 is slidably installed on the main shaft 105 along the axial direction. The inner ring of the movable sealing ring 215 is symmetrically provided with two arc-shaped platforms. The two arc-shaped platforms of the movable sealing ring 215 are respectively inserted into the two arc-shaped grooves of the main shaft 105. The inner compression spring 219 is in a compressed state, so that the movable sealing ring 215 is close to the inner sealing ring 214.

[0048] like Figures 6-10As shown, the lubrication mechanism also includes an annular inner lubrication cavity 212 disposed in the pump housing 101. An annular inner lubrication ring 211 is disposed in the front end cylinder 111. The other end of the oil inlet pipe 213 is connected to the upper end of the inner lubrication cavity 212. The lower end of the inner lubrication cavity 212 is connected to one end of the connecting pipe 204. The other end of the connecting pipe 204 is connected to one end of the inner lubrication ring 211. The other end of the inner lubrication ring 211 is connected to the other end of the return oil pipe 203.

[0049] The main shaft 105 and the front end cylinder 111 are sealed by the movable sealing ring 206 and the inner sealing ring 205, and the pump housing 101 is sealed by the movable sealing ring 215 and the inner sealing ring 214 to prevent leakage of the conveyed chemicals. When the main shaft 105 rotates, the movable sealing ring 215 rotates relative to the inner sealing ring 214, and the movable sealing ring 206 rotates relative to the inner sealing ring 205. The main shaft 105 drives the drive wheel 221 to rotate via the drive belt 220. The drive wheel 221 drives the lower drive wheel 223 and the oil conveying impeller 224 via the lower drive belt 222. The rotation of the impeller 224 delivers lubricating oil from the lubricating oil tank 201 through the oil inlet pipe 213. The lubricating oil in the oil inlet pipe 213 then enters the inner lubrication chamber 212, which is filled with lubricating oil. The lubricating oil in the inner lubrication chamber 212 lubricates the movable sealing ring 215 and the inner sealing ring 214. Subsequently, the lubricating oil enters the inner lubrication ring 211 through the connecting pipe 204. The inner lubrication ring 211 is filled with lubricating oil, which lubricates the movable sealing ring 206 and the inner sealing ring 205.

[0050] As the movable sealing ring 215 rotates relative to the inner sealing ring 214, and the movable sealing ring 206 rotates relative to the inner sealing ring 205, wear will occur on the movable sealing rings 215 and 206. When the movable sealing ring 206 or 215 is worn, the pressure spring 210 or the inner clamping spring 219 rebounds, causing the pressure ring 208 or the inner clamping column 218 to push the movable sealing ring 206 or 215 outward, so that the movable sealing ring 206 is always in close contact with the inner sealing ring 205, and the movable sealing ring 215 is always in close contact with the inner sealing ring 214, ensuring the reliability of the seal.

[0051] like Figures 11-14 As shown, the heat dissipation mechanism includes a heat dissipation shell 302 fixedly installed on the rear heat dissipation shell 301. The rear heat dissipation shell 301 is provided with multiple heat dissipation fins. A heat dissipation impeller 303 is rotatably installed inside the heat dissipation shell 302. The heat dissipation shell 302 is provided with multiple ventilation holes.

[0052] like Figures 11-14As shown, the heat dissipation mechanism also includes a fixing strip 308 fixedly installed at the end of the main shaft 105, a friction disc 307 slidably installed on the main shaft 105, a return spring 309 provided between the friction disc 307 and the fixing strip 308, and textures provided on the friction disc 307 to increase friction. An expansion cylinder 304 is provided inside the rear heat dissipation shell 301, an outer pusher 305 is slidably installed inside the expansion cylinder 304, and a top wheel 306 is rotatably installed on the outer pusher 305. The top wheel 306 contacts the friction disc 307. The expansion cylinder 304 is filled with gas that expands when heated. During normal operation, the friction disc 307 does not contact the heat dissipation impeller 303.

[0053] When the pump is running normally, the friction disc 307 does not contact the cooling impeller 303. When the pump temperature is too high, the gas inside the expansion cylinder 304 expands due to heat, pushing the outer pusher 305 and the top wheel 306 outward. The rotation of the main shaft 105 always drives the friction disc 307 to rotate. The outward movement of the top wheel 306 pushes the friction disc 307 to slide outward along the main shaft 105, and the return spring 309 is compressed. When the friction disc 307 contacts the cooling impeller 303, the friction disc 307 drives the cooling impeller 303 to rotate through friction. The cooling impeller 303 blows air to cool the pump. The heat sinks on the heat sink housing 104 and the rear heat sink housing 301 provide auxiliary cooling for the pump.

[0054] The working principle of the self-circulating cooling chemical pump disclosed in this invention is as follows: When the coil 109 is energized, it drives the magnet 108, the inner cylinder 107 and the main shaft 105 to rotate through electromagnetic induction. The main shaft 105 drives the centrifugal impeller 106 to rotate, drawing the chemicals in from the inlet pipe 102 and discharging them from the outlet pipe 103. The magnet 108 and the coil 109 will generate heat, which is conducted to the heat-conducting copper sleeve 112. The heat is then conducted to the pump casing 101 through the heat-conducting copper sleeve 112 and the heat-conducting pipe 110. Subsequently, the heat is conducted to the chemicals, and some of the heat is carried away by the chemicals themselves. Under normal conditions, the heat generated by the magnet 108 and the coil 109 is small, which will not cause the temperature of the chemicals to rise excessively.

[0055] The main shaft 105 and the front end cylinder 111 are sealed by the movable sealing ring 206 and the inner sealing ring 205, and the pump housing 101 is sealed by the movable sealing ring 215 and the inner sealing ring 214 to prevent leakage of the conveyed chemicals. When the main shaft 105 rotates, the movable sealing ring 215 rotates relative to the inner sealing ring 214, and the movable sealing ring 206 rotates relative to the inner sealing ring 205. The main shaft 105 drives the drive wheel 221 to rotate via the drive belt 220. The drive wheel 221 drives the lower drive wheel 223 and the oil conveying impeller 224 via the lower drive belt 222. The rotation of the impeller 224 delivers lubricating oil from the lubricating oil tank 201 through the oil inlet pipe 213. The lubricating oil in the oil inlet pipe 213 then enters the inner lubrication chamber 212, which is filled with lubricating oil. The lubricating oil in the inner lubrication chamber 212 lubricates the movable sealing ring 215 and the inner sealing ring 214. Subsequently, the lubricating oil enters the inner lubrication ring 211 through the connecting pipe 204. The inner lubrication ring 211 is filled with lubricating oil, which lubricates the movable sealing ring 206 and the inner sealing ring 205.

[0056] As the movable sealing ring 215 rotates relative to the inner sealing ring 214, and the movable sealing ring 206 rotates relative to the inner sealing ring 205, wear will occur on the movable sealing rings 215 and 206. When the movable sealing ring 206 or 215 is worn, the pressure spring 210 or the inner clamping spring 219 rebounds, causing the pressure ring 208 or the inner clamping column 218 to push the movable sealing ring 206 or 215 outward, so that the movable sealing ring 206 is always in close contact with the inner sealing ring 205, and the movable sealing ring 215 is always in close contact with the inner sealing ring 214, ensuring the reliability of the seal.

[0057] When the pump is running normally, the friction disc 307 does not contact the cooling impeller 303. When the pump temperature is too high, the gas inside the expansion cylinder 304 expands due to heat, pushing the outer pusher 305 and the top wheel 306 outward. The rotation of the main shaft 105 always drives the friction disc 307 to rotate. The outward movement of the top wheel 306 pushes the friction disc 307 to slide outward along the main shaft 105, and the return spring 309 is compressed. When the friction disc 307 contacts the cooling impeller 303, the friction disc 307 drives the cooling impeller 303 to rotate through friction. The cooling impeller 303 blows air to cool the pump. The heat sinks on the heat sink housing 104 and the rear heat sink housing 301 provide auxiliary cooling for the pump.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope of the present invention based on the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A self-circulating cooling chemical pump, comprising a main body mechanism for conveying chemical liquids, characterized in that: The main body includes a pump housing (101), and the main body is provided with a lubrication mechanism for lubricating the pump and a heat dissipation mechanism for cooling the pump. The main structure includes a heat dissipation shell (104) fixedly installed on the outside of the pump casing (101), a front end cylinder (111) fixedly installed on the pump casing (101), a rear heat dissipation shell (301) fixedly installed on the heat dissipation shell (104), a main shaft (105) rotatably installed inside the rear heat dissipation shell (301), the main shaft (105) passing through the heat dissipation shell (104), the pump casing (101) and the front end cylinder (111), a plurality of heat dissipation fins are provided on the heat dissipation shell (104), and the main shaft (105) is rotatably installed with the heat dissipation shell (104); The lubrication mechanism includes a lubricating fluid tank (201) fixedly installed on the heat dissipation shell (104), an oil filling cap (202) is provided on the top of the lubricating fluid tank (201), the lubricating fluid tank (201) is filled with lubricating oil, and one end of the oil return pipe (203) and the oil inlet pipe (213) are fixedly installed on the lubricating fluid tank (201). The lubrication mechanism also includes a transmission wheel (221) rotatably mounted on the heat dissipation housing (104), a transmission belt (220) wrapped around the transmission wheel (221) and the main shaft (105), a perforated plate (225) fixedly mounted inside the lubricant tank (201), an oil conveying impeller (224) rotatably mounted on the perforated plate (225), a plurality of holes provided on the perforated plate (225), a lower transmission wheel (223) fixedly mounted on the oil conveying impeller (224), and a lower transmission belt (222) wrapped around the lower transmission wheel (223) and the transmission wheel (221). The lubrication mechanism also includes a fixed ring (207) fixedly installed on the main shaft (105), a plurality of pressure rods (209) slidably installed on the fixed ring (207), a pressure ring (208) fixedly installed on the pressure rod (209), a pressure rod spring (210) is provided between the pressure ring (208) and the fixed ring (207), an inner sealing ring (205) is fixedly installed inside the front end cylinder (111), the main shaft (105) and the inner sealing ring (205) are rotatably installed, a movable sealing ring (206) is slidably installed on the main shaft (105), and the pressure rod spring (210) is in a compressed state, so that the movable sealing ring (206) is pressed against the inner sealing ring (205); The lubrication mechanism also includes an inner fixing ring (217) fixedly installed on the main shaft (105), a plurality of inner clamping columns (218) slidably installed on the inner fixing ring (217), a clamping ring (216) fixedly installed on the inner clamping column (218), an inner clamping spring (219) is provided between the clamping ring (216) and the inner fixing ring (217), an inner sealing ring (214) is fixedly installed inside the pump housing (101), the main shaft (105) is rotatably installed with the inner sealing ring (214), a movable sealing ring (215) is slidably installed on the main shaft (105), and the inner clamping spring (219) is in a compressed state, so that the movable sealing ring (215) is pressed against the inner sealing ring (214). The lubrication mechanism also includes an annular inner lubrication cavity (212) disposed in the pump housing (101), an annular inner lubrication ring (211) disposed in the front end cylinder (111), the other end of the oil inlet pipe (213) is connected to the upper end of the inner lubrication cavity (212), the lower end of the inner lubrication cavity (212) is connected to one end of the connecting pipe (204), the other end of the connecting pipe (204) is connected to one end of the inner lubrication ring (211), and the other end of the inner lubrication ring (211) is connected to the other end of the return oil pipe (203).

2. The self-circulating cooling chemical pump according to claim 1, characterized in that: The main structure also includes an inlet pipe (102) and an outlet pipe (103) fixedly installed on the pump casing (101). The inlet pipe (102) and the outlet pipe (103) are respectively connected to the chemical delivery pipeline. A centrifugal impeller (106) is fixedly installed on the main shaft (105). The centrifugal impeller (106) is located in the pump casing (101).

3. The self-circulating cooling chemical pump according to claim 2, characterized in that: The main body also includes an inner cylinder (107) fixedly installed on the main shaft (105), a plurality of magnets (108) are provided on the inner cylinder (107), a heat-conducting copper sleeve (112) is fixedly installed inside the heat dissipation shell (104), a plurality of heat-conducting pipes (110) are provided inside the heat-conducting copper sleeve (112), the ends of the heat-conducting pipes (110) and the heat-conducting copper sleeve (112) are in contact with the pump shell (101), a coil (109) is fixedly installed inside the heat-conducting copper sleeve (112), and the inner cylinder (107) and the magnets (108) are located inside the coil (109).

4. A self-circulating cooling chemical pump according to claim 1, characterized in that: The heat dissipation mechanism includes a heat dissipation shell (302) fixedly installed on the rear heat dissipation shell (301), a plurality of heat dissipation fins are provided on the rear heat dissipation shell (301), a heat dissipation impeller (303) is rotatably installed inside the heat dissipation shell (302), and a plurality of air vents are provided on the heat dissipation shell (302).

5. A self-circulating cooling chemical pump according to claim 4, characterized in that: The heat dissipation mechanism also includes a fixing bar (308) fixedly installed at the end of the main shaft (105), a friction disc (307) slidably installed on the main shaft (105), a return spring (309) is provided between the friction disc (307) and the fixing bar (308), the friction disc (307) is provided with textures to increase friction, an expansion cylinder (304) is provided inside the rear heat dissipation shell (301), an outer pusher (305) is slidably installed inside the expansion cylinder (304), a top wheel (306) is rotatably installed on the outer pusher (305), the top wheel (306) contacts the friction disc (307), the expansion cylinder (304) is filled with gas that expands when heated, and during normal operation, the friction disc (307) does not contact the heat dissipation impeller (303).

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