A cone-type anti-blocking chemical pump with container sealing function

Abstract

The present invention discloses a conical anti-blocking chemical pump with a container sealing function, the conical anti-blocking chemical pump comprises a pump body, a bearing body, a connector, a driving motor, a base and a support foot, the pump body and the bearing body are arranged on the base through the support foot, the pump body and the connector are arranged on the left and right sides of the bearing body respectively, the driving motor is arranged on the side of the connector away from the bearing body, and an impeller and an impeller nut are arranged on the inner side of the pump body away from the bearing body. Compared with the current chemical pump provided with a double-end face sealing assembly, the present invention ensures that the working medium in the pump body will not flow into the bearing body when the chemical pump is used for a long time. In addition, the pump cover sealing cavity adopts a conical large cavity structure, and drainage is performed by the auxiliary blade ribs arranged circumferentially in the sealing cavity in combination with centrifugal force, which avoids the accumulation of particles in the conveying medium in the dead corner of the sealing cavity, thereby wearing the sealing silicon carbide ring surface, and more effectively prolonging the service life of the seal.

Description

Technical Field

[0001] The invention relates to the technical field of chemical pumps, in particular to a cone-type anti-blocking chemical pump with a container sealing function. Background Art

[0002] Chemical pumps are indispensable equipment in the chemical production process. According to their working principles, they can be divided into vane pumps, reciprocating pumps, and rotary pumps; according to the production process or product characteristics, they can be divided into high-pressure methylamine pumps, cryogenic pumps, phosphoric acid slurry pumps, etc. However, no matter what kind of pump, it is extremely susceptible to medium corrosion and erosion and wear, so that the sealing of the pump is prone to problems.

[0003] At present, chemical pumps usually adopt non-container seals, which means that the pump needs to be repaired every time it works for a period of time, which greatly reduces the working efficiency. In addition, during the operation of the pump, not only will the working medium flow friction with the pump body, thereby generating heat and transferring it to the bearing body, but if the temperature of the working medium is too high, the heat of the working medium will also be transferred to the bearing body, causing the various components in the bearing body to heat up. Under the influence of heat, the various components in the bearing body are very easy to deform, age and damage. At present, the cooling method of the pump body is too single, and the pump body is usually cooled by a fan and coolant. However, the above cooling method has great energy loss, which is not conducive to reducing production costs. Finally, the chemical pump will be overloaded during operation, or backflow will occur after the work is completed. These phenomena will cause damage to the shaft of the chemical pump drive device, so that the working time of the chemical pump is greatly affected. Summary of the invention

[0004] The object of the present invention is to provide a conical anti-blocking chemical pump with a container sealing function to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a conical anti-blocking chemical pump with a container sealing function, the conical anti-blocking chemical pump comprises a pump body, a bearing body, a connector, a drive motor, a base and a support foot, the pump body and the bearing body are arranged on the base through the support foot, the pump body and the connector are arranged on the left and right sides of the bearing body respectively, the drive motor is arranged on the side of the connector away from the bearing body, an impeller and an impeller nut are arranged on the side of the pump body away from the bearing body, the impeller is fixedly mounted on the impeller nut, a pump cover is arranged on the side of the pump body close to the bearing body, and the sealing cavity of the pump cover is adopted. A conical large cavity structure is used, and auxiliary blade ribs are arranged around the sealing cavity. A pump shaft, a double-end face sealing assembly and a circulation mechanism are arranged inside the bearing body. The pump shaft is movably installed inside the bearing body through a first sleeve, a first bearing and a second bearing. The double-end face sealing assembly is arranged on a side of the bearing body close to the pump cover and is fixedly connected to the pump cover. The circulation mechanism is arranged on a side of the bearing body away from the pump cover. A first connector and a second connector are arranged inside the connecting body. One end of the pump shaft is connected to the impeller nut, and the other end of the pump shaft is connected to the drive motor through the first connector and the second connector.

[0006] The present invention is provided with a static double-end face sealing component, and the sealing end faces are all equipped with pressureless sintered silicon carbide material, which ensures that it is not easy to deform and the compensation is uniform under long-term use conditions, and better ensures the compensation performance of the seal. The pump cover sealing cavity adopts a conical large cavity structure, and the auxiliary blade ribs arranged circumferentially in the sealing cavity are used for drainage in conjunction with centrifugal force, which avoids the accumulation of particles in the conveying medium in the dead corners of the sealing cavity and thus wears the sealing silicon carbide ring surface, and more effectively increases the service life of the seal. Under similar complex working conditions, the use effect is excellent. In addition, the present invention is also provided with a circulation mechanism, and the pump shaft will drive the circulation mechanism to work when it rotates, and the circulation mechanism can reduce the various The temperature of the components can be prevented from deformation, aging and damage of the components in the bearing body due to temperature rise. Finally, the present invention is provided with a first connector and a second connector, through which the drive motor can drive the pump shaft to rotate. At the same time, when the working medium flows back, the first connector and the second connector can offset the reverse rotation force of the pump shaft, thereby avoiding deformation of the rotating shaft of the drive motor due to the torque transmitted by the impeller. In addition, the first connector and the second connector can eliminate a part of the torque exerted on the drive motor when the pump is overloaded. When the pump is overloaded beyond the safety value, the power supply of the drive motor can be automatically cut off to prevent the pump from being damaged due to overload operation.

[0007] Furthermore, the double-end face sealing assembly includes a fixed sleeve and a second sleeve, the fixed sleeve is connected to the pump cover, the second sleeve is connected to the first sleeve, a static ring cavity pressure plate is provided on the side of the fixed sleeve close to the pump cover, a flexible graphite pad is provided on the side of the static ring cavity pressure plate close to the pump cover, two groups of static sealing rings are provided between the fixed sleeve and the second sleeve, the two groups of static sealing rings are connected by push rings and elastic elements, one group of static sealing rings is sealed and connected to the second sleeve through a lower movable ring, and the other group of static sealing rings is sealed and connected to the second sleeve through an upper movable ring.

[0008] When the double-end face sealing assembly is working, the two sets of static sealing rings can be firmly pressed against the lower dynamic ring and the upper dynamic ring through the push ring and the elastic element. The elastic element is made of Hastelloy C276 material, and the elastic coefficient is more stable. It is not easy to deform and the compensation is uniform under long-term use conditions. A sealing O-ring is arranged between the static ring cavity pressure plate and the static sealing ring. The sealing O-ring is made of perfluoroether or AFLAS material, which is corrosion-resistant and oxidation-resistant, and can well overcome the corrosiveness and oxidation of copper sulfate solution. The O-ring is not easy to deform and age during long-term operation. Compared with the old non-container seal, the double-end face sealing assembly arranged in the present invention has a greatly increased service life.

[0009] Furthermore, the circulation mechanism includes a circulation frame, a conversion gear, a turntable, a pressure stabilizing frame, an air guide pipe, a first air outlet groove, a second air outlet groove, a temperature difference component and an exhaust pipe, the conversion gear is fixedly mounted on the pump shaft, the circulation frame and the turntable are fixedly mounted inside the bearing body, the turntable and the conversion gear are connected by a worm, a push plate is arranged inside the circulation frame, the push plate and the turntable are connected by a connecting rod, a group of air outlets and a group of air inlets are arranged at one end of the circulation frame away from the turntable, the air outlets are connected to the guide pipe through the connecting pipe and the first air outlet groove, and the air inlet is connected to the air guide pipe through the connecting pipe and the first air outlet groove. The air pipe is connected, the air inlet is connected to the external environment through a one-way air inlet valve, a one-way air outlet valve is arranged at one end of the air guide pipe close to the pump cover, the pressure stabilizing frame is arranged at one end of the bearing body close to the double-end sealing component, the exhaust pipe is arranged at one end of the bearing body close to the circulation frame, the pressure stabilizing frame and the exhaust pipe are connected through a second air outlet groove, the exhaust pipe extends out of the bearing body at one end away from the second air outlet groove, the temperature difference component is arranged between the first air outlet groove and the second air outlet groove, and the temperature difference component is connected to the refrigeration plate arranged inside the air guide pipe.

[0010] When the driving motor drives the pump shaft to rotate, the turntable can be driven to rotate through the conversion gear and the worm gear, and the push plate can be made to move back and forth inside the circulation frame through the turntable and the connecting rod. Each movement of the push plate will transport the external gas to the end of the bearing body close to the pump cover. The circulation mechanism can make the end of the bearing body close to the pump cover in a positive pressure state to prevent the working medium inside the pump body from penetrating into the bearing body. On the one hand, the pressure stabilizing frame can prevent the internal pressure of the bearing body from being too high, thereby causing damage to the bearing body. On the other hand, the pressure stabilizing frame can circulate the heat inside the bearing body to the outside world, thereby preventing aging and damage to various components in the bearing body. Finally, the temperature difference component can be used to determine the temperature difference between the temperature inside the bearing body and the temperature of the external gas. When the temperature difference is too large, the temperature difference component can be used to control the operation of the refrigeration plate set inside the air guide pipe to ensure the temperature reduction inside the bearing body.

[0011] Furthermore, a voltage stabilizing plate, a first conductive block, a voltage stabilizing groove and a voltage stabilizing spring rod are arranged inside the voltage stabilizing frame, the air inlet end of the voltage stabilizing groove is far away from the second air outlet groove, and the air outlet end of the voltage stabilizing groove is close to the second air outlet groove, the voltage stabilizing plate is slidably mounted on the voltage stabilizing spring rod, and there are two groups of the first conductive blocks, one group of which is fixedly mounted on the voltage stabilizing spring rod, and the other group of which is fixedly mounted on the voltage stabilizing plate, and the two groups of the first conductive blocks are connected to the one-way air inlet valve arranged on the outside of the circulation frame through wires.

[0012] When the pressure inside the bearing body is greater than the elastic force of the pressure-stabilizing spring rod, the pressure-stabilizing plate will move toward the exhaust pipe, and finally the gas inside the bearing body will flow into the second air outlet groove through the pressure-stabilizing groove. During the movement of the pressure-stabilizing plate, the distance between the two groups of first conductive blocks will change. When the two groups of first conductive blocks are connected to an external power supply and an ammeter, the pressure inside the bearing body can be judged by detecting the change in current, thereby avoiding excessive pressure inside the bearing body and damage to the bearing body.

[0013] Furthermore, the temperature difference component includes a temperature sensing frame, an insulating plate and a second conductive block, the temperature sensing frame is provided with temperature sensing gas inside, the insulating plate is arranged at the middle position inside the temperature sensing frame through a reset spring rod, the two ends of the temperature sensing frame close to the first air outlet groove and the second air outlet groove are made of heat-conductive material, and two groups of second conductive blocks are arranged on the side of the insulating plate away from the second air outlet groove, one group of the second conductive blocks is fixedly mounted on the insulating plate, and the other group of the second conductive blocks is fixedly mounted on one end of the insulating plate close to the first air outlet groove, the two groups of the second conductive blocks are connected by a conductive rod, and the two groups of the second conductive blocks are electrically connected to the refrigeration plate arranged inside the air duct.

[0014] The temperature-sensing frame is divided into two areas that do not conduct heat to each other under the action of the insulation board. When the temperature inside the bearing body differs too much from the temperature of the external gas, the expansion amplitude of the temperature-sensing gas in the two areas will differ greatly. At this time, the insulation board will move to the side with lower temperature. When the distance between the two groups of second conductive blocks changes, the current received by the cooling plate will change accordingly. At this time, the cooling plate will automatically adjust the cooling effect according to the change of current, while ensuring that the components in the bearing body are at a safe temperature, minimizing energy loss as much as possible.

[0015] Furthermore, the first connector is connected to the pump shaft through a first flat key and a first keyway, the second connector is connected to the rotating shaft of the drive motor through a second flat key and a second keyway, a slot is provided at one end of the first connector close to the second connector, a flexible frame is provided on the outside of the slot, the flexible frame is connected to the first connector through a flexible spring, a pin and a fixing slot are provided at one end of the second connector close to the first connector, one end of the pin is provided inside the fixing slot through a fixing spring, and the other end of the pin extends out of the fixing slot and is inserted into the slot.

[0016] Through the above technical solution, when the pin is inserted into the slot, the flexible frame can clamp the pin through the flexible spring, and the first connector and the second connector are reliably connected through the pin and the slot. When the working medium flows back or the pump is overloaded, the flexible spring and the flexible frame can reduce the torque on the shaft of the drive motor to prevent the shaft of the drive motor from deformation.

[0017] Furthermore, a centrifugal chamber is provided inside the second connector, a centrifugal plate is provided inside the centrifugal chamber, the centrifugal plate and the centrifugal chamber are connected via a centrifugal spring, the centrifugal chamber and the interior of the fixed groove are filled with transmission fluid, a contraction groove is provided inside the latch, a pressure-sensitive block is provided inside the contraction groove, and the contraction groove is connected to the centrifugal chamber via the fixed groove.

[0018] Through the above technical solution, when the driving motor drives the pump shaft to rotate at high speed, the second connector will rotate accordingly. Under the action of centrifugal force, the centrifugal plate will squeeze the transmission fluid in the centrifugal chamber, so that the transmission fluid flows from the centrifugal chamber into the contraction groove. The transmission fluid can push the pressure-sensitive block out of the contraction groove. The double tightening action of the pressure-sensitive block and the flexible frame ensures the tightness of the first connector and the second connector.

[0019] Furthermore, a piezoelectric crystal is arranged at one end of the flexible frame close to the flexible spring, and the piezoelectric crystal is connected to the driving motor.

[0020] Through the above technical solution, when the pump is operating normally, the pressure-sensing block will squeeze the flexible frame, and the flexible spring will be in a compressed state. When the pump is overloaded, the pump shaft speed will decrease, and the pressure-sensing block will shrink back into the contraction groove. At this time, the flexible spring will be released to a certain extent. The compression degree of the flexible spring can be determined by detecting the change in the electrical signal of the piezoelectric crystal. When the compression degree is less than the safety value, the piezoelectric crystal will send a set of signals to automatically cut off the power supply of the drive motor to prevent the pump from being damaged due to overload operation. The anti-overload measures provided by the present invention do not affect the anti-overload measures of the drive motor itself, and can provide redundant protection for the pump.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: compared with the current chemical pumps provided with double-end face sealing components, the present invention ensures that when the chemical pump is used for a long time, the working medium in the pump body will not flow into the bearing body; in addition, the pump cover sealing cavity adopts a conical large cavity structure, and the auxiliary blade ribs arranged circumferentially in the sealing cavity cooperate with the centrifugal force for drainage, thereby avoiding the accumulation of particles in the conveying medium in the dead corners of the sealing cavity, thereby wearing the sealing silicon carbide ring surface, and more effectively prolonging the service life of the seal; the present invention is also provided with a circulation mechanism, which can not only make the end of the bearing body close to the pump cover in a positive pressure state through the circulation mechanism to further prevent the working medium in the pump body from penetrating into the bearing body, but also can make the heat in the bearing body circulate to the outside through the pressure stabilizing frame, thereby avoiding aging and damage of various components in the bearing body, The temperature difference component can be used to determine the temperature difference between the inside of the bearing body and the outside air. When the temperature difference between the inside of the bearing body and the outside air is too large, the temperature difference component can control the cooling effect of the refrigeration plate to achieve the purpose of using minimal energy loss to ensure that the components inside the bearing body are at a safe temperature. Finally, the present invention is provided with a first connector and a second connector, and the drive motor drives the pump shaft to rotate through the first connector and the second connector. When the working medium flows back or the chemical pump is overloaded, the flexible spring and the flexible frame can reduce the torque on the rotating shaft of the drive motor to prevent the rotating shaft of the drive motor from deformation. When the chemical pump is overloaded beyond the safety value, a set of signals can be sent through the electrical signal change of the piezoelectric crystal to automatically cut off the power supply of the drive motor to prevent the pump from being damaged due to overload operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the pump body and the bearing body of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the double-end face sealing assembly of the present invention;

[0026] Figure 4 It is a schematic diagram of the working structure of the circulation mechanism of the present invention;

[0027] Figure 5 It is a schematic diagram of the pressure relief working structure of the pressure stabilizing frame of the present invention;

[0028] Figure 6 It is a schematic diagram of the working structure of the temperature difference component of the present invention;

[0029] Figure 7 It is a schematic diagram of the internal structure of the connector of the present invention;

[0030] Figure 8 is a schematic structural diagram of a first connector and a second connector of the present invention;

[0031] Fig. 9 It is a schematic structural diagram of the first connector and the second connector when the chemical pump of the present invention is overloaded.

[0032] In the figure: 1- pump body, 11- impeller, 12- impeller nut, 13- pump cover, 2- bearing body, 21- first sleeve, 22- first bearing, 23- pump shaft, 24- double end face seal assembly, 241- fixed sleeve, 242- static ring cavity pressure plate, 243- lower moving ring, 244- second sleeve, 245- static seal ring, 246- push ring, 247- upper moving ring, 25- circulation mechanism, 251- circulation frame, 2511- push plate, 252- conversion gear, 253- turntable, 254- pressure stabilizing frame, 2541- pressure stabilizing plate, 2542- first guide Electric block, 2543-pressure stabilizing groove, 255-air guide pipe, 256-first air outlet groove, 257-second air outlet groove, 258-temperature difference component, 2581-temperature sensing frame, 2582-insulating plate, 2583-second conductive block, 259-exhaust pipe, 26-second bearing, 3-connector, 31-first connector, 311-flexible frame, 32-second connector, 321-centrifugal chamber, 322-centrifugal plate, 323-fixed groove, 324-latch, 3241-pressure sensing block, 3242-contraction groove, 4-drive motor, 5-base, 6-support foot. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figure 1-Figure 9 As shown, a cone-type anti-blocking chemical pump with a container sealing function, the cone-type anti-blocking chemical pump comprises a pump body 1, a bearing body 2, a connector 3, a drive motor 4, a base 5 and a support foot 6. The pump body 1 and the bearing body 2 are arranged on the base 5 through the support foot 6. The pump body 1 and the connector 3 are arranged on the left and right sides of the bearing body 2 respectively. The drive motor 4 is arranged on the side of the connector 3 away from the bearing body 2. An impeller 11 and an impeller nut 12 are arranged on the side of the pump body 1 away from the bearing body 2. The impeller 11 is fixedly mounted on the impeller nut 12. A pump cover 13 is arranged on the side of the pump body 1 close to the bearing body 2. The sealing cavity of the pump cover 13 adopts a cone-type large cavity structure, and a sealing cavity is arranged around There are auxiliary blade ribs, and the bearing body 2 is provided with a pump shaft 23, a double-end face sealing assembly 24 and a circulation mechanism 25. The pump shaft 23 is movably installed in the bearing body 2 through a first sleeve 21, a first bearing 22 and a second bearing 26. The double-end face sealing assembly 24 is arranged on the side of the bearing body 2 close to the pump cover 13 and is fixedly connected to the pump cover 13. The circulation mechanism 25 is arranged on the side of the bearing body 2 away from the pump cover 13. The connecting body 3 is provided with a first connector 31 and a second connector 32. One end of the pump shaft 23 is connected to the impeller nut 12, and the other end of the pump shaft 23 is connected to the drive motor 4 through the first connector 31 and the second connector 32.

[0035] The present invention is provided with a static double-end face seal assembly 24, and the sealing end faces are all made of pressureless sintered silicon carbide material to ensure that it is not easy to deform and the compensation is uniform under long-term use conditions, and the compensation performance of the seal is better ensured. The pump cover 13 sealing cavity adopts a conical large cavity structure, and the auxiliary blade ribs arranged circumferentially in the sealing cavity are used for drainage in conjunction with centrifugal force, which avoids the accumulation of particles in the conveying medium in the dead corners of the sealing cavity, thereby wearing the sealing silicon carbide ring surface, and more effectively prolonging the service life of the seal. Under similar complex working conditions, the use effect is excellent. In addition, during the operation of the pump, the working medium will generate flow friction with the pump body 1 and the pump cover 13, and then generate heat. At the same time, when the working medium temperature is too high, the heat will be transferred to the bearing body 2, causing the various components in the bearing body 2 to heat up. The present invention is provided with a circulation mechanism 25, and the pump shaft 23 will bring The circulation mechanism 25 works, and the temperature of each component in the bearing body 2 can be reduced through the circulation mechanism 25, so as to prevent the components in the bearing body 2 from being deformed, aged and damaged due to temperature rise. Finally, the present invention is provided with a first connector 31 and a second connector 32, and the drive motor 4 can drive the pump shaft 23 to rotate through the first connector 31 and the second connector 32. At the same time, when the working medium flows back, the reverse rotation force of the pump shaft 23 can be offset through the first connector 31 and the second connector 32, so as to avoid the deformation of the rotating shaft of the drive motor 4 caused by the torque transmitted by the impeller 11. In addition, the first connector 31 and the second connector 32 can eliminate a part of the torque exerted on the drive motor 4 when the pump is overloaded. When the pump overload exceeds the safety value, the power supply of the drive motor 4 can be automatically cut off to prevent the pump from being damaged due to overload operation.

[0036] like Figure 1-Figure 9 As shown, the double-end face sealing assembly 24 includes a fixed sleeve 241 and a second sleeve 244, the fixed sleeve 241 is connected to the pump cover 13, the second sleeve 244 is connected to the first sleeve 21, a static ring cavity pressure plate 242 is arranged on the side of the fixed sleeve 241 close to the pump cover 13, a flexible graphite pad is arranged on the side of the static ring cavity pressure plate 242 close to the pump cover 13, two groups of static sealing rings 245 are arranged between the fixed sleeve 241 and the second sleeve 244, the two groups of static sealing rings 245 are connected to each other through a push ring 246 and an elastic element, one group of static sealing rings 245 is sealed and connected to the second sleeve 244 through a lower moving ring 243, and the other group of static sealing rings 245 is sealed and connected to the second sleeve 244 through an upper moving ring 247.

[0037] When the double-end face sealing assembly 24 is working, the two sets of static sealing rings 245 can be firmly pressed against the lower dynamic ring 243 and the upper dynamic ring 247 through the push ring 246 and the elastic element. The elastic element is made of Hastelloy C276 material, and the elastic coefficient is more stable. It is not easy to deform and the compensation is uniform under long-term use conditions. A sealing O-ring is arranged between the static ring cavity pressure plate 242 and the static sealing ring 245. The sealing O-ring is made of perfluoroether or AFLAS material, which is corrosion-resistant and oxidation-resistant, and can well overcome the corrosiveness and oxidizing properties of copper sulfate solution. The O-ring is not easy to deform and age during long-term operation. Compared with the old non-container seal, the double-end face sealing assembly 24 arranged in the present invention has a greatly increased service life.

[0038] like Figure 1-Figure 9 As shown, the circulation mechanism 25 includes a circulation frame 251, a conversion gear 252, a turntable 253, a pressure stabilizing frame 254, an air guide pipe 255, a first air outlet groove 256, a second air outlet groove 257, a temperature difference component 258 and an exhaust pipe 259. The conversion gear 252 is fixedly installed on the pump shaft 23, the circulation frame 251 and the turntable 253 are fixedly installed inside the bearing body 2, the turntable 253 and the conversion gear 252 are connected by a worm, a push plate 2511 is arranged inside the circulation frame 251, and the push plate 2511 and the turntable 253 are connected by a connecting rod, and a group of air outlets and a group of air inlets are arranged at one end of the circulation frame 251 away from the turntable 253, and the air outlets are connected to the first The air outlet groove 256 is connected to the air guide pipe 255, and the air inlet is connected to the external environment through a one-way air inlet valve. A one-way air outlet valve is provided at one end of the air guide pipe 255 close to the pump cover 13. The pressure stabilizing frame 254 is arranged at one end of the interior of the bearing body 2 close to the double-end face sealing assembly 24. The exhaust pipe 259 is arranged at one end of the interior of the bearing body 2 close to the circulation frame 251. The pressure stabilizing frame 254 and the exhaust pipe 259 are connected through the second air outlet groove 257. One end of the exhaust pipe 259 away from the second air outlet groove 257 extends out of the bearing body 2. The temperature difference component 258 is arranged between the first air outlet groove 256 and the second air outlet groove 257. The temperature difference component 258 is connected to the refrigeration plate arranged inside the air guide pipe 255.

[0039] When the driving motor 4 drives the pump shaft 23 to rotate, the turntable 253 can be driven to rotate through the conversion gear 252 and the worm, and the push plate 2511 can be reciprocated inside the circulation frame 251 through the turntable 253 and the connecting rod. Each movement of the push plate 2511 will transport external gas to the end of the bearing body 2 close to the pump cover 13. The circulation mechanism 25 can make the end of the bearing body 2 close to the pump cover 13 in a positive pressure state to prevent the working medium inside the pump body 1 from penetrating into the bearing body 2. On the one hand, the pressure stabilizing frame 254 can prevent the internal pressure of the bearing body 2 from being too high, thereby causing damage to the bearing body 2. On the other hand, the pressure stabilizing frame 254 can circulate the heat inside the bearing body 2 to the outside, thereby preventing aging and damage to various components in the bearing body 2. Finally, the temperature difference component 258 can determine the temperature difference between the temperature inside the bearing body 2 and the temperature of the external gas. When the temperature difference is too large, the temperature difference component 258 can control the operation of the refrigeration plate set inside the air guide pipe 255 to ensure the temperature reduction in the bearing body 2.

[0040] like Figure 1-Figure 9 As shown, the interior of the voltage stabilizing frame 254 is provided with a voltage stabilizing plate 2541, a first conductive block 2542, a voltage stabilizing groove 2543 and a voltage stabilizing spring rod, the air inlet end of the voltage stabilizing groove 2543 is far away from the second air outlet groove 257, and the air outlet end of the voltage stabilizing groove 2543 is close to the second air outlet groove 257, the voltage stabilizing plate 2541 is slidably mounted on the voltage stabilizing spring rod, and two groups of first conductive blocks 2542 are provided, one group of which is fixedly mounted on the voltage stabilizing spring rod, and the other group of which is fixedly mounted on the voltage stabilizing plate 2541.

[0041] When the pressure inside the bearing body 2 is greater than the elastic force of the pressure-stabilizing spring rod, the pressure-stabilizing plate 2541 will move toward the exhaust pipe 259, and finally the gas inside the bearing body 2 will flow into the second air outlet groove 257 through the pressure-stabilizing groove 2543. During the movement of the pressure-stabilizing plate 2541, the distance between the two groups of first conductive blocks 2542 will change. When the two groups of first conductive blocks 2542 are connected to an external power supply and an ammeter, the pressure inside the bearing body 2 can be determined by detecting the change in current, thereby preventing the internal pressure of the bearing body 2 from being too high and causing damage to the bearing body 2.

[0042] like Figure 1-Figure 9As shown, the temperature difference component 258 includes a temperature sensing frame 2581, an insulating plate 2582 and a second conductive block 2583. The temperature sensing frame 2581 is provided with temperature sensing gas inside. The insulating plate 2582 is arranged at the middle position inside the temperature sensing frame 2581 through a reset spring rod. The two ends of the temperature sensing frame 2581 close to the first air outlet groove 256 and the second air outlet groove 257 are made of heat-conductive material. Two groups of second conductive blocks 2583 are arranged on the side of the insulating plate 2582 away from the second air outlet groove 257, one group of the second conductive blocks 2583 is fixedly mounted on the insulating plate 2582, and the other group of the second conductive blocks 2583 is fixedly mounted on one end of the insulating plate 2582 close to the first air outlet groove 256. The two groups of second conductive blocks 2583 are connected by conductive rods, and the two groups of second conductive blocks 2583 are electrically connected to the cooling plate arranged inside the air guide pipe 255.

[0043] The temperature sensing frame 2581 is divided into two areas that do not conduct heat to each other under the action of the insulation plate 2582. When the temperature inside the bearing body 2 differs too much from the temperature of the external gas, the expansion amplitude of the temperature sensing gas in the two areas will differ greatly. At this time, the insulation plate 2582 will move to the side with lower temperature. When the distance between the two groups of second conductive blocks 2583 changes, the current received by the cooling plate will change accordingly. At this time, the cooling plate will automatically adjust the cooling effect according to the change in current, while ensuring that the components in the bearing body 2 are at a safe temperature, reducing energy loss as much as possible.

[0044] like Figure 1-Figure 9 As shown, the first connector 31 is connected to the pump shaft 23 through the first flat key and the first keyway, the second connector 32 is connected to the rotating shaft of the drive motor 4 through the second flat key and the second keyway, a slot is provided at one end of the first connector 31 close to the second connector 32, a flexible frame 311 is provided on the outside of the slot, the flexible frame 311 is connected to the first connector 31 through a flexible spring, a latch 324 and a fixing slot 323 are provided at one end of the second connector 32 close to the first connector 31, one end of the latch 324 is arranged inside the fixing slot 323 through a fixing spring, and the other end of the latch 324 extends out of the fixing slot 323 and is inserted into the slot.

[0045] Through the above technical solution, when the pin 324 is inserted into the slot, the flexible frame 311 can clamp the pin 324 through the flexible spring, and the first connector 31 and the second connector 32 are reliably connected through the pin 324 and the slot. When the working medium flows back or the pump is overloaded, the flexible spring and the flexible frame 311 can reduce the torque on the shaft of the drive motor 4 to prevent the shaft of the drive motor 4 from being deformed.

[0046] like Figure 1-Figure 9As shown, a centrifugal chamber 321 is provided inside the second connector 32, a centrifugal plate 322 is provided inside the centrifugal chamber 321, the centrifugal plate 322 and the centrifugal chamber 321 are connected via a centrifugal spring, the centrifugal chamber 321 and the interior of the fixed groove 323 are filled with transmission fluid, a contraction groove 3242 is provided inside the latch 324, a pressure sensing block 3241 is provided inside the contraction groove 3242, and the contraction groove 3242 is communicated with the centrifugal chamber 321 via the fixed groove 323.

[0047] Through the above technical solution, when the driving motor 4 drives the pump shaft 23 to rotate at high speed, the second connector 32 will rotate accordingly. Under the action of centrifugal force, the centrifugal plate 322 will squeeze the transmission fluid in the centrifugal chamber 321, so that the transmission fluid flows from the centrifugal chamber 321 into the contraction groove 3242. The transmission fluid can push the pressure sensing block 3241 out of the contraction groove 3242. The double tightening action of the pressure sensing block 3241 and the flexible frame 311 ensures the tightness of the first connector 31 and the second connector 32.

[0048] like Figure 1-Figure 9 As shown, a piezoelectric crystal is disposed at one end of the flexible frame 311 close to the flexible spring, and the piezoelectric crystal is connected to the driving motor 4 .

[0049] Through the above technical solution, when the pump is operating normally, the pressure-sensing block 3241 will squeeze the flexible frame 311, and the flexible spring will be in a compressed state. When the pump is overloaded, the speed of the pump shaft 23 will decrease, and the pressure-sensing block 3241 will shrink back into the shrinkage groove 3242. At this time, the flexible spring will be released to a certain extent. The compression degree of the flexible spring can be determined by detecting the change in the electrical signal of the piezoelectric crystal. When the compression degree is less than the safety value, the piezoelectric crystal will send a set of signals to automatically cut off the power supply of the drive motor 4 to prevent the pump from being damaged due to overload operation. The anti-overload measure provided in the present invention does not affect the anti-overload measure of the drive motor 4 itself, and can provide redundant protection for the pump.

[0050] The working principle of the present invention is as follows: when working, the pump shaft 23 is driven by the driving motor 4, and the working medium is transported by the rotation of the impeller 11. During the working process, the two sets of static sealing rings 245 can be firmly pressed against the lower moving ring 243 and the upper moving ring 247 through the push ring 246 and the elastic element to prevent the working medium in the pump body 1 from flowing into the bearing body 2. When the pump shaft 23 rotates, the turntable 253 can be driven to rotate through the conversion gear 252 and the worm. Under the action of the turntable 253, the push plate 2511 will transport the external gas to the end of the bearing body 2 close to the pump cover 13, so that the end of the bearing body 2 close to the pump cover 13 is in a positive pressure state, further preventing the working medium in the pump body 1 from penetrating into the bearing body 2. While preventing the pressure inside the bearing body 2 from being too high through the pressure stabilizing frame 254, it can ensure that the heat inside the bearing body 2 circulates to the outside, thereby preventing the components in the bearing body 2 from Aging damage. When the temperature inside the bearing body 2 differs too much from the temperature of the external gas, the insulation plate 2582 will move to the side of the temperature sensing frame 2581 with a lower temperature. At this time, the current received by the cooling plate will change accordingly. According to the change of current, the cooling plate will automatically adjust the cooling effect to use the least energy loss to ensure that the components in the bearing body 2 are at a safe temperature. When the working medium flows back, the flexible spring and the flexible frame 311 can reduce the torque on the shaft of the drive motor 4 to prevent the shaft of the drive motor 4 from deforming. When the pump is overloaded, the speed of the pump shaft 23 will decrease, and the pressure sensing block 3241 will shrink back into the shrinkage groove 3242. At this time, the degree of compression of the flexible spring can be judged by the change of the electrical signal of the piezoelectric crystal. When the degree of compression is less than the safety value, the piezoelectric crystal will send a set of signals to automatically cut off the power supply of the drive motor 4 to prevent the pump from being damaged by overload operation.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cone-type anti-blocking chemical pump with container sealing function, characterized in that: The conical anti-blocking chemical pump comprises a pump body (1), a bearing body (2), a connecting body (3), a driving motor (4), a base (5) and a support foot (6). The pump body (1) and the bearing body (2) are arranged on the base (5) via the support foot (6). The pump body (1) and the connecting body (3) are arranged on the left and right sides of the bearing body (2), respectively. The driving motor (4) is arranged on the side of the connecting body (3) away from the bearing body (2). An impeller (11) and an impeller nut (12) are arranged on the side of the pump body (1) away from the bearing body (2). The impeller (11) is fixedly mounted on the impeller nut (12). A pump cover (13) is arranged on the side of the pump body (1) close to the bearing body (2). The sealing cavity of the pump cover (13) adopts a conical large cavity structure. The sealing cavity is provided with auxiliary blade ribs around it. A pump shaft (23), a double-end seal assembly (24) and a circulation mechanism (25) are arranged inside the bearing body (2); the pump shaft (23) is movably mounted inside the bearing body (2) via a first sleeve (21), a first bearing (22) and a second bearing (26); the double-end seal assembly (24) is arranged inside the bearing body (2) on a side close to the pump cover (13) and is fixedly connected to the pump cover (13); the circulation mechanism (25) is arranged inside the bearing body (2) on a side away from the pump cover (13); a first connector (31) and a second connector (32) are arranged inside the connecting body (3); one end of the pump shaft (23) is connected to the impeller nut (12); and the other end of the pump shaft (23) is connected to the drive motor (4) via the first connector (31) and the second connector (32); The circulation mechanism (25) comprises a circulation frame (251), a conversion gear (252), a rotating disk (253), a pressure stabilizing frame (254), an air guide pipe (255), a first air outlet groove (256), a second air outlet groove (257), a temperature difference component (258) and an exhaust pipe (259); the conversion gear (252) is fixedly mounted on the pump shaft (23); the circulation frame (251) and the rotating disk (253) are fixedly mounted inside the bearing body (2); the rotating disk (253) and the conversion gear (252) are connected via a worm; a push plate (2511) is arranged inside the circulation frame (251); the push plate (2511) and the rotating disk (253) are connected via a connecting rod; a group of air outlets and a group of air inlets are arranged at one end of the circulation frame (251) away from the rotating disk (253); the air outlets are connected via a connecting pipe and a second air inlet. An air outlet groove (256) is connected to the air guide pipe (255), the air inlet is connected to the external environment through a one-way air inlet valve, a one-way air outlet valve is provided at one end of the air guide pipe (255) close to the pump cover (13), the pressure stabilizing frame (254) is arranged at one end of the bearing body (2) close to the double-end seal component (24), the exhaust pipe (259) is arranged at one end of the bearing body (2) close to the circulation frame (251), the pressure stabilizing frame (254) and the exhaust pipe (259) are connected through a second air outlet groove (257), and one end of the exhaust pipe (259) away from the second air outlet groove (257) extends out of the bearing body (2), the temperature difference component (258) is arranged between the first air outlet groove (256) and the second air outlet groove (257), and the temperature difference component (258) is connected to a cooling plate arranged inside the air guide pipe (255).

2. The cone-type anti-blocking chemical pump with container sealing function according to claim 1 is characterized in that: The double-end face seal assembly (24) comprises a fixed sleeve (241) and a second sleeve (244); the fixed sleeve (241) is connected to the pump cover (13); the second sleeve (244) is connected to the first sleeve (21); a static ring cavity pressure plate (242) is provided on a side of the fixed sleeve (241) close to the pump cover (13); a flexible graphite pad is provided on a side of the static ring cavity pressure plate (242) close to the pump cover (13); two groups of static sealing rings (245) are provided between the fixed sleeve (241) and the second sleeve (244); the two groups of static sealing rings (245) are connected via a push ring (246) and an elastic element; one group of the static sealing rings (245) is sealedly connected to the second sleeve (244) via a lower moving ring (243); and the other group of the static sealing rings (245) is sealedly connected to the second sleeve (244) via an upper moving ring (247).

3. The cone-type anti-blocking chemical pump with container sealing function according to claim 1 is characterized in that: The voltage stabilizing frame (254) is provided with a voltage stabilizing plate (2541), a first conductive block (2542), a voltage stabilizing groove (2543) and a voltage stabilizing spring rod inside. The air inlet end of the voltage stabilizing groove (2543) is far away from the second air outlet groove (257), and the air outlet end of the voltage stabilizing groove (2543) is close to the second air outlet groove (257). The voltage stabilizing plate (2541) is slidably mounted on the voltage stabilizing spring rod. Two groups of the first conductive blocks (2542) are provided in total, one group of which is fixedly mounted on the voltage stabilizing spring rod, and the other group of which is fixedly mounted on the voltage stabilizing plate (2541).

4. The cone-type anti-blocking chemical pump with container sealing function according to claim 3 is characterized in that: The temperature difference component (258) comprises a temperature sensing frame (2581), an insulating plate (2582) and a second conductive block (2583); a temperature sensing gas is arranged inside the temperature sensing frame (2581); the insulating plate (2582) is arranged at a middle position inside the temperature sensing frame (2581) via a return spring rod; two ends of the temperature sensing frame (2581) close to the first gas outlet groove (256) and the second gas outlet groove (257) are made of heat-conducting material; the insulating plate (2582) is far away from the second gas outlet groove. Two groups of second conductive blocks (2583) are arranged on one side of (257), one group of the second conductive blocks (2583) is fixedly mounted on the insulation board (2582), and the other group of the second conductive blocks (2583) is fixedly mounted on one end of the insulation board (2582) close to the first air outlet groove (256), the two groups of the second conductive blocks (2583) are connected by conductive rods, and the two groups of the second conductive blocks (2583) are electrically connected to the cooling plate arranged inside the air guide pipe (255).

5. The cone-type anti-blocking chemical pump with container seal function according to claim 1 is characterized in that: The first connector (31) is connected to the pump shaft (23) via a first flat key and a first keyway, and the second connector (32) is connected to the rotating shaft of the drive motor (4) via a second flat key and a second keyway. A slot is provided at one end of the first connector (31) close to the second connector (32), and a flexible frame (311) is provided outside the slot. The flexible frame (311) is connected to the first connector (31) via a flexible spring. A latch (324) and a fixing slot (323) are provided at one end of the second connector (32) close to the first connector (31). One end of the latch (324) is arranged inside the fixing slot (323) via a fixing spring, and the other end of the latch (324) extends out of the fixing slot (323) and is inserted into the slot.

6. The cone-type anti-blocking chemical pump with container seal function according to claim 5, characterized in that: A centrifugal chamber (321) is provided inside the second connector (32), a centrifugal plate (322) is provided inside the centrifugal chamber (321), the centrifugal plate (322) and the centrifugal chamber (321) are connected via a centrifugal spring, the centrifugal chamber (321) and the interior of the fixed groove (323) are filled with transmission fluid, a contraction groove (3242) is provided inside the latch (324), a pressure sensing block (3241) is provided inside the contraction groove (3242), and the contraction groove (3242) is connected to the centrifugal chamber (321) via the fixed groove (323).

7. The cone-type anti-blocking chemical pump with container seal function according to claim 6 is characterized in that: A piezoelectric crystal is provided at one end of the flexible frame (311) close to the flexible spring, and the piezoelectric crystal is connected to the drive motor (4).

Images