Energy-saving electric delivery pump for material proportioning

Abstract

The invention relates to the technical field of variable displacement pump equipment, in particular to an energy-saving type electric delivery pump for material proportioning, which comprises a delivery pump body and an empty load prevention mechanism mounted on the delivery pump body, in the material delivery process, on one hand, pressure detection is associated with countdown of a controller, and on the other hand, pressure detection is associated with countdown of the controller; by means of the structure, when the liquid inlet end of the conveying pump body is lack of materials, a shutdown program can be automatically started, shutdown can be delayed, then when material supply is delayed and the material supply speed is unstable, continuous operation of the conveying pump body can be maintained, the degree of frequent starting and stopping of equipment can be reduced, and on the basis that materials are completely conveyed, the starting frequency is reduced, and the efficiency is improved. On the other hand, when the liquid outlet end is insufficient in material supply, the materials stored in the flow storage box are used for providing material supply for the delivery pump body, so that the no-load degree of the delivery pump body in the delayed shutdown process is reduced, and the problem that the service life of the delivery pump body is shortened due to no-load is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of variable displacement pump equipment, in particular to an energy-saving electric delivery pump for material proportioning. Background Art

[0002] Barrel pumps, also known as plug-in barrel pumps, are mainly used to transport various acids, alkalis, solvents, additives, auxiliaries, oils and other liquid media in barrels or containers. Depending on the drive, barrel pumps are divided into hand-cranked barrel pumps, electric barrel pumps and pneumatic barrel pumps.

[0003] Due to the different models and types of barrel pumps, the pumping structure principles of barrel pumps are not exactly the same. Among them, plunger pumps and centrifugal pumps are the mainstream. For this reason, when using barrel pumps, different usage methods and different precautions need to be adopted according to their models and types to achieve the normal use of the barrel pumps. Most barrel pumps cannot be run at no-load for a long time during normal use. This is because long-term no-load operation will cause abnormal temperature rise inside the pump body. When the plunger pump is no-load, dry friction will occur between the reciprocating piston and the cylinder due to lack of medium lubrication. At the same time, the mechanical seals continue to generate heat through friction under no medium cooling conditions; when the centrifugal pump is no-load, cavitation will occur in the gap between the impeller and the pump casing due to the lack of medium. This no-load condition will not only accelerate the wear rate of key components such as bearings and sealing rings, but in severe cases it will even cause pump body deformation or motor winding burning.

[0004] In the prior art, in order to prevent the barrel pump from being idle and causing dry burning due to insufficient raw materials in the barrel or other external factors, a pressure sensor is often set to monitor the conveying medium pressure value in real time. When the pressure is detected to be lower than the set threshold, the power is automatically cut off to reduce the probability of no-load dry burning. However, when transporting liquid materials with a relatively viscous texture, it is found that the flow of viscous liquid materials has hysteresis, which causes the barrel pump outlet pressure to fluctuate. Therefore, when setting the threshold, when the threshold is too high, the barrel pump will be frequently started and stopped, which will not only affect the transportation of materials, but also shorten the service life of the barrel pump due to frequent start and stop. When the threshold is set too low, although the barrel pump is not easy to stop after being started, it will cause the barrel pump to be idle, which will also affect the service life of the barrel pump.

[0005] In view of this, the present invention proposes an energy-saving electric conveying pump for material proportioning, which is used to solve the above technical problems. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes an energy-saving electric conveying pump for material proportioning.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the energy-saving electric conveying pump for material proportioning of the present invention comprises a conveying pump body and an anti-air load mechanism installed on the conveying pump body, the conveying pump body comprises a liquid inlet end and a liquid outlet end, and the liquid inlet end is embedded with a filter element; The anti-no-load mechanism is installed on the delivery pump body, and is used to prevent the delivery pump body from being idling. The anti-no-load mechanism includes: A pressure measuring tube is installed on the liquid outlet end. A pressure drop stop device is installed in the pressure measuring tube. The pressure drop stop device is used to detect the water pressure in the liquid outlet end and control the delivery pump body to stop according to the water pressure value; A flow storage box is installed below the pressure measuring tube and is electrically connected to the pressure measuring tube; A reflux pipe is installed at the bottom of the flow storage box, and one end of the reflux pipe away from the flow storage box is conductively connected to the liquid inlet end.

[0008] Preferably, the pressure drop shutdown component includes a valve plate, an elastic component, an adjusting component and a pressure sensor; The inner cavity of the pressure measuring tube is designed in a stepped shape, the valve plate and the elastic member are installed in the inner cavity of the pressure measuring tube, the elastic member is fixedly connected to the valve plate, and in the initial state, the valve plate is installed at the stepped diameter change of the inner cavity of the pressure measuring tube; The adjusting member is threadedly connected to the pressure measuring tube, the adjusting member extends into the interior of the pressure measuring tube, the elastic member is fixedly connected to the adjusting member, and the adjusting member is used to adjust the initial pressure of the elastic member; The pressure sensor is installed on the adjusting member, located between the adjusting member and the elastic member, and is electrically connected to the delivery pump body.

[0009] Preferably, the anti-air load mechanism further includes a flow blocking member and a transmission rod; The two sides of the flow box are respectively provided with a liquid storage hole and a liquid flow hole, and the flow box is connected to the pressure measuring tube and the return pipe through the liquid storage hole and the liquid flow hole respectively; The flow blocking member is installed in the flow storage box, and the two ends of the flow blocking member correspond to the liquid storage hole and the liquid flow hole; The transmission rod is fixedly mounted on the flow-blocking component, extends into the pressure measuring tube through the liquid storage hole, and is fixedly connected to the valve plate.

[0010] Preferably, under normal delivery power, the flow blocking element closes the liquid flow hole and opens the liquid storage hole, and under the initial state, the flow blocking element closes the liquid storage hole and opens the liquid flow hole.

[0011] Preferably, a cleaning and dredging mechanism is further included, and the cleaning and dredging mechanism cooperates with the anti-air load mechanism, and the cleaning and dredging mechanism is used to dredge the filter element, and the cleaning and dredging mechanism includes: A scraper, wherein the scraper is sleeved and mounted on the liquid inlet end, and the filter is located on the movement path of the scraper; The telescopic sleeve is installed on the liquid inlet end, a liquid cavity is formed between the telescopic sleeve and the liquid inlet end, the reflux pipe is conductively connected to the liquid cavity, the telescopic sleeve consists of a fixed end and a telescopic end, wherein the fixed end is fixedly connected to the liquid inlet end, and the telescopic end is slidingly and sealingly connected to the fixed end, and the scraper is fixedly installed at the bottom of the telescopic end.

[0012] Preferably, the scraper and the telescopic end are both hollow in design, the density of the scraper and the telescopic end are both less than the density of the conveying medium, and the bottom of the liquid inlet end is closed and the side wall is open.

[0013] Preferably, a bellows is fixedly installed between the telescopic end and the fixed end, a jet ring is fixedly installed on the telescopic end, the jet ring is provided with evenly distributed injection holes, and the return pipe, bellows and jet ring inner cavity are connected in sequence.

[0014] Preferably, the injection holes are all arranged at an angle, and the top ends of the injection holes face the filter element.

[0015] Preferably, it further includes a pressurized impact mechanism, which cooperates with the cleaning and dredging mechanism to enhance the cleaning and dredging effect of the filter element. The pressurized impact mechanism includes: A booster plate, symmetrically mounted in the accumulator box, with both ends of the booster plate connected to the inner wall of the accumulator box via elastic membranes, and used to increase the water pressure in the accumulator box; An electric telescopic rod is located on the side wall of the current storage box, corresponds to the supercharging plate one by one, and is used to push the supercharging plate to move.

[0016] Preferably, a water level detector is installed in the current storage box, and the water level detector is electrically connected to the pressure sensor and the electric telescopic rod through a control program.

[0017] The beneficial effects of the present invention are as follows: 1. The energy-saving electric conveying pump for material proportioning described in the present invention is equipped with an anti-no-load mechanism, which is associated with a pressure drop shutdown component. During the material conveying process, on the one hand, the pressure detection is associated with the countdown of the controller, so that when the conveying pump body is short of material at the liquid inlet end, it can not only automatically start the shutdown program, but also delay the shutdown, and then, when there is a hysteresis in the material supply and the material supply rate is unstable, it can maintain the continuous operation of the conveying pump body, reduce the degree of frequent start and stop of the equipment, and reduce the high current energy consumption when the material is completely conveyed by reducing the number of startups. On the other hand, when the material supply at the liquid outlet end is insufficient, the material stored in the flow storage box is used to provide material supply for the conveying pump body, thereby reducing the no-load degree of the conveying pump body during the delayed shutdown process, and alleviating the problem of shortened service life of the conveying pump body due to no-load.

[0018] 2. The energy-saving electric conveying pump for material proportioning described in the present invention is equipped with a cleaning and unblocking mechanism, which is coordinated with the anti-airload mechanism. When the pressure is reduced, on the one hand, the filter element is surrounded by the descent of the telescopic end, and when there is insufficient material in the container, the reflux material can be prevented from flowing outward. On the other hand, the pressure and gravity of the reflux material, combined with the buoyancy of the scraper and the telescopic end, can unblock the filter element when it is blocked, thereby facilitating continuous material conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 It is an overall stereogram of the present invention; Figure 2 It is a perspective view of the anti-airborne mechanism of the present invention; Figure 3 It is a three-dimensional diagram of the partial structure of the anti-aircraft mechanism; Figure 4 is a cross-sectional view of the accumulator box; Figure 5 It is a three-dimensional diagram of the liquid inlet end; Figure 6 It is a disassembled three-dimensional diagram of the cleaning and dredging mechanism; Figure 7 It is a partial cross-sectional view of the cleaning and dredging mechanism; In the figure: 1. Pump body; 11. Liquid inlet end; 12. Liquid outlet end; 13. Filter element; 2. Pressure measuring tube; 21. Accumulator box; 22. Return pipe; 23. Valve plate; 24. Adjusting element; 25. Pressure sensor; 26. Flow blocking element; 27. Transmission rod; 28. Liquid storage hole; 29. ​​Liquid flow hole; 3. Scraper; 31. Telescopic sleeve; 32. Liquid cavity; 4. Bellows; 41. Jet ring; 42. Injection hole; 5. Booster plate; 51. Electric telescopic rod; 6. Elastic element. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figures 1 to 7 As shown, the energy-saving electric conveying pump for material proportioning of the present invention includes a conveying pump body 1 and an anti-air load mechanism installed on the conveying pump body 1. The conveying pump body 1 includes a liquid inlet end 11 and a liquid outlet end 12. The liquid inlet end 11 is embedded with a filter element 13; The anti-no-load mechanism is installed on the delivery pump body 1, and is used to prevent the delivery pump body 1 from being idling. The anti-no-load mechanism includes: A pressure measuring tube 2 is installed on the liquid outlet 12. A pressure drop stop device is installed in the pressure measuring tube 2. The pressure drop stop device is used to detect the water pressure in the liquid outlet 12 and control the delivery pump body 1 to stop according to the water pressure value; A flow storage box 21 is installed below the pressure measuring tube 2, and the flow storage box 21 is conductively connected to the pressure measuring tube 2; The reflux pipe 22 is installed at the bottom of the flow storage box 21 , and one end of the reflux pipe 22 away from the flow storage box 21 is conductively connected to the liquid inlet end 11 .

[0023] The pressure drop shutdown component includes a valve plate 23, an elastic member 6, an adjustment member 24 and a pressure sensor 25; The inner cavity of the pressure measuring tube 2 is designed in a stepped shape, and the valve plate 23 and the elastic member 6 are installed in the inner cavity of the pressure measuring tube 2. The elastic member 6 is fixedly connected to the valve plate 23. In the initial state, the valve plate 23 is installed at the stepped diameter change of the inner cavity of the pressure measuring tube 2; The adjusting member 24 is threadedly connected to the pressure measuring tube 2, and the adjusting member 24 extends into the interior of the pressure measuring tube 2. The elastic member 6 is fixedly connected to the adjusting member 24, and the adjusting member 24 is used to adjust the initial pressure of the elastic member 6; The pressure sensor 25 is mounted on the adjusting member 24 . The pressure sensor 25 is located between the adjusting member 24 and the elastic member 6 . The pressure sensor 25 is electrically connected to the delivery pump body 1 .

[0024] The anti-air load mechanism further includes a flow blocker 26 and a transmission rod 27; The flow box 21 is provided with a liquid storage hole 28 and a liquid flow hole 29 on both sides. The flow box 21 is connected to the pressure measuring tube 2 and the return pipe 22 through the liquid storage hole 28 and the liquid flow hole 29 respectively. The flow blocker 26 is installed in the flow storage box 21, and the two ends of the flow blocker 26 correspond to the liquid storage hole 28 and the liquid flow hole; The transmission rod 27 is fixedly mounted on the flow blocking member 26 . The transmission rod 27 extends into the pressure measuring tube 2 through the liquid storage hole 28 . The transmission rod 27 is fixedly connected to the valve plate 23 .

[0025] Under normal delivery power, the baffle 26 closes the flow hole 29, and under the initial state, the baffle 26 closes the liquid storage hole 28. In the present invention, the normal delivery power is after the valve plate 23 moves under the action of hydraulic pressure, and the initial state is when the hydraulic pressure does not push the valve plate 23 to move, and in the present invention, the diameter of the liquid storage hole 28 is larger than the diameter of the flow hole 29.

[0026] When an electric delivery pump is used to deliver liquid materials in containers such as barrels and tanks for material proportioning, the electric delivery pump needs to be inserted into the liquid material through the container opening, and then the delivery pump body 1 is started, so that the delivery pump body 1 extracts the material through the liquid inlet end 11 and discharges it outward from the liquid outlet end 12. During this continuous process, when the material in the container is delivered or the flow of the material has hysteresis, resulting in insufficient material supply at the liquid inlet end 11, in order to prevent the delivery pump body 1 from being empty and damaged, an anti-empty mechanism is provided in the present invention. When the pressure at the liquid outlet end 12 decreases, the countdown of the shutdown program of the delivery pump body 1 is started through a pre-set program. At the same time, the solution stored in the solution is delivered to the liquid inlet end 11 to maintain continuous delivery of the delivery pump body 1, thereby reducing the damage caused by emptying the delivery pump body 1.

[0027] Specifically, when conveying materials, when the electric conveying pump is inserted into the material, the material flows to the liquid inlet end 11 on the conveying pump body 1 under the action of hydraulic pressure. When the conveying pump body 1 is started, the liquid can continue to flow from the liquid inlet end 11 to the liquid outlet end 12. By matching the pipeline with the conveying pump body 1, the extraction and pumping of the material can be realized. In this process, when the material is pumped to the liquid outlet end 12, it flows from the liquid outlet end 12 into the pressure measuring tube 2. Since the gap between the valve plate 23 and the inner cavity of the pressure measuring tube 2 is small in the initial state, the valve plate 23 gradually pushes the elastic member 6 under the hydraulic pressure of the material, causing the material flow in the pressure measuring tube 2 to increase. When the valve plate 23 moves, it The valve disc 23 moves synchronously with the flow-blocking member 26 connected by the transmission rod 27. When the valve disc 23 does not move, the flow-blocking member 26 closes the liquid storage hole 28, causing the flow storage box 21 to be disconnected from the pressure measuring tube 2. As the water pressure increases, the movement distance of the valve disc 23 gradually increases, causing the flow-blocking member 26 to gradually separate from the liquid storage hole 28, and the other end of the flow-blocking member 26 gradually moves into the liquid flow hole 29 until the flow-blocking member 26 completely separates from the liquid storage hole 28. At this time, the flow-blocking member 26 has closed the liquid flow hole 29. At this time, the flow storage box 21 is connected to the pressure measuring tube 2. When the material flows in the pressure measuring tube 2, part of the material flows into the flow storage box 21 for storage under the action of the hydraulic pressure until the flow storage box 21 is completely full.

[0028] When the elastic member 6 is pushed by the valve plate 23, it produces elastic deformation and accumulates elastic potential energy, thereby causing the value of the pressure sensor 25 located between the adjusting member 24 and the elastic member 6 to change, and the hydraulic pressure in the pressure measuring tube 2 is displayed in real time. In the present invention, the pressure sensor 25 is electrically connected to the delivery pump body 1, that is, the pressure sensor 25 is electrically connected to the controller which is part of the delivery pump body 1. Under the control of a preset program, when the delivery pump body 1 is in the open state, when the value of the pressure sensor 25 is less than a preset threshold value, the controller starts the countdown. When the countdown returns to zero, the delivery pump body 1 stops running (this is the conventional operation of the electric delivery pump control technology, which will not be elaborated here).

[0029] During the countdown process, in order to always maintain the flow state of the material in the conveying pump body 1 to avoid the conveying pump body 1 from being idling, when the hydraulic pressure in the pressure measuring tube 2 decreases, the elastic member 6 gradually releases its elastic potential energy and pushes the valve plate 23 to reset. In this process, the movement of the valve plate 23 causes the flow blocking member 26 to reset synchronously. As the movement progresses, the flow blocking member 26 disengages from the liquid flow hole, causing the flow storage box 21 and the return pipe 22 to be connected. At this time, under the action of gravity, the liquid in the return pipe 22 gradually flows into the liquid inlet end 11 and is pumped into the pressure measuring tube 2 again under the action of the conveying pump body 1. Since the flow blocking member 26 closes the liquid storage hole 28 at this time, the material flows through the gap between the valve plate 23 and the inner cavity of the pressure measuring tube 2. By controlling the flow rate of the reflux tube 22, the time for the material in the flow storage box 21 to be completely lost can be adjusted. Adjusting this time is related to the control The ratio of the controller countdown time can be used to empty the flow box 21 when the conveying pump body 1 is closed, and the conveying pump body 1 can be prevented from rotating at no load. Before the countdown of the controller ends, the supply of material at the liquid inlet end 11 is restored, that is, in addition to the material refluxed by the reflux pipe 22, the material in the container is also replenished to the liquid inlet end 11. At this time, the flow rate of the material pumped by the conveying pump body 1 increases, thereby increasing the flow rate at the liquid outlet end 12, and then increasing the hydraulic pressure in the pressure measuring tube 2 and changing the value of the pressure sensor 25, thereby resetting the countdown of the controller. As the hydraulic pressure increases and the valve plate 23 moves, the conduction relationship between the flow box 21 and the pressure measuring tube 2 and the reflux pipe 22 changes accordingly, and material is accumulated in the flow box 21 again, so that when the hydraulic pressure drops next time, the degree of no-load phenomenon of the conveying pump body 1 is reduced.

[0030] The present invention provides an anti-no-load mechanism and associates the anti-no-load mechanism with a pressure drop shutdown component. During the material conveying process, on the one hand, pressure detection is associated with the countdown of the controller, so that when the conveying pump body 1 is out of material at the liquid inlet end 11, it can not only automatically start the shutdown program, but also delay the shutdown. Therefore, when there is a hysteresis in the material supply and the material supply rate is unstable, the continuous operation of the conveying pump body 1 can be maintained, and the degree of frequent start and stop of the equipment can be reduced. On the basis of complete material conveying, the number of startups is reduced, thereby reducing the high current energy consumption when the startup is carried out. On the other hand, when the material supply at the liquid outlet end 12 is insufficient, the material stored in the flow storage box 21 is used to provide material supply for the conveying pump body 1, thereby reducing the no-load degree of the conveying pump body 1 during the delayed shutdown process, and alleviating the problem of reduced service life of the conveying pump body 1 due to no-load.

[0031] As a preferred embodiment of the present invention, it further includes a cleaning and dredging mechanism, which cooperates with the anti-air load mechanism and is used to dredge the filter element 13. The cleaning and dredging mechanism includes: The scraper 3 is sleeved and mounted on the liquid inlet end 11, and the filter element 13 is located on the movement path of the scraper 3; The telescopic sleeve 31 is sleeved and installed on the liquid inlet end 11. A liquid cavity 32 is formed between the telescopic sleeve 31 and the liquid inlet end 11. The reflux pipe 22 is conductively connected to the liquid cavity 32. The telescopic sleeve 31 consists of a fixed end and a telescopic end, wherein the fixed end is fixedly connected to the liquid inlet end 11, and the telescopic end is slidingly and sealingly connected to the fixed end. The scraper 3 is fixedly installed at the bottom of the telescopic end.

[0032] The scraper 3 and the telescopic end are both hollow in design, and the density of the scraper 3 and the telescopic end is less than the density of the conveying medium. The liquid inlet end 11 is designed with a closed bottom and an open side wall.

[0033] During material transportation, in order to prevent the solid particles such as precipitation and agglomeration in the material from damaging the equipment, a filter element 13 is detachably mounted on the liquid inlet end 11 (the type and aperture of the filter element 13 are adjusted according to the properties of the transported material). As the material is continuously pumped, precipitation and agglomeration may adhere to the filter element 13. Therefore, a cleaning and unblocking mechanism is provided in the present invention. When the pressure value in the pressure measuring tube 2 drops to a threshold value, the material in the flow storage box 21 flows to the liquid inlet end 11 through the reflux pipe 22. Since the liquid inlet end 11 is installed It is equipped with a telescopic sleeve 31 and a scraper 3, and the density of the telescopic end and the scraper 3 is less than the density of the medium. Therefore, if the solution in the container is pumped out at this time, the telescopic end and the scraper 3 will drop by themselves under the action of gravity during the process of the liquid level dropping, and scrape the filter element 13 during the dropping process. When the material in the reflux pipe 22 flows into the telescopic liquid chamber 32, the descent of the telescopic end can wrap the filter element 13, and then the material in the liquid chamber 32 flows into the liquid inlet end 11 through the filter element 13, preventing the material from flowing out.

[0034] If the material pumping pressure is reduced at this time because the filter element 13 is clogged and causes insufficient material supply, as the reflux pipe 22 is connected to the liquid chamber 32, since the height of the flow storage box 21 is higher than the liquid level, the material in the flow storage box 21 flows into the liquid chamber 32 through the reflux pipe 22 under the action of gravity, thereby pushing the telescopic end and the scraper 3 to move downward. The movement of the telescopic end and the scraper 3 is utilized to scrape and clean the filter element 13. When the material in the liquid chamber 32 is transported through the liquid inlet end 11, the telescopic end and the scraper 3 float up under the action of buoyancy, causing the filter element 13 to be exposed in the container again, and the cleaned filter element 13 is able to pass the material again, thereby maintaining the continuous transportation of the material.

[0035] The present invention sets up a cleaning and unblocking mechanism, and utilizes the cleaning and unblocking mechanism to cooperate with the anti-air load mechanism. When the pressure is reduced, on the one hand, the filter element 13 is surrounded by the descent of the telescopic end, and when there is insufficient material in the container, the reflux material can be prevented from flowing outward. On the other hand, through the pressure and gravity of the reflux material, combined with the buoyancy of the scraper 3 and the telescopic end, the filter element 13 can be unblocked when it is blocked, thereby facilitating continuous material transportation.

[0036] A bellows 4 is fixedly installed between the telescopic end and the fixed end. A jet ring 41 is fixedly installed on the telescopic end. The jet ring 41 is provided with evenly distributed injection holes 42. The return pipe 22, the bellows 4 and the inner cavity of the jet ring 41 are connected in sequence.

[0037] The injection holes 42 are all arranged at an angle, and the top ends of the injection holes 42 face the filter element 13 .

[0038] When the logistics flows back, it flows through the return pipe 22, the bellows 4 and the jet ring 41 in sequence, and impacts the filter element 13, which can clear the slight blockage on the filter element 13.

[0039] As a preferred embodiment of the present invention, it further includes a pressurization impact mechanism, which cooperates with the cleaning and dredging mechanism to enhance the cleaning and dredging effect of the filter element 13. The pressurization impact mechanism includes: A booster plate 5 is mounted within the accumulator box 21. Both ends of the booster plate 5 are connected to the inner wall of the accumulator box 21 via an elastic membrane. The booster plate 5 is used to increase the water pressure within the accumulator box 21. In this embodiment, there are two booster plates 5, symmetrically distributed on both sides of the accumulator box 21. The two booster plates 5 cooperate with the elastic membrane to divide the accumulator box 21 into three mutually non-conductive chambers, of which the middle chamber is conductively connected to the liquid storage hole 28 and the liquid flow hole 29. The electric telescopic rods 51 are mounted in the left and right chambers, respectively. The electric telescopic rod 51 is located on the side wall of the accumulator box 21 . The electric telescopic rod 51 corresponds to the supercharging plate 5 in a one-to-one manner. The electric telescopic rod 51 is used to push the supercharging plate 5 to move.

[0040] A water level detector is installed in the current storage box 21 , and the water level detector is electrically connected to the pressure sensor 25 and the electric telescopic rod 51 through a control program.

[0041] When the value of the pressure sensor 25 drops below the threshold, the shutdown program in the controller starts the countdown, and at the same time, the material in the accumulator box 21 flows back through the reflux pipe 22. As the reflux continues, the water level detector detects that the water level in the accumulator box 21 continues to drop. At this time, the reflux material enters the bellows 4 and the jet ring 41 through the reflux pipe 22 and slowly flows out from the injection hole 42. During this process, if the water level detector detects that the water level is stagnant, that is, when the liquid level in the accumulator box 21 does not drop, it is judged that the reflux is abnormal, that is, the telescopic end and the scraper 3 cannot continue to drop. At this time, the water level sensor sends a signal to the control program. Under the action of the pre-set control program, the electric telescopic rod 51 extends. When the electric telescopic rod 51 extends, it pushes the booster plate 5 to move, thereby causing the liquid level in the accumulator box 21 to rise first, and then when the liquid level reaches the maximum value, the accumulator The hydraulic pressure in the box 21 increases. Under the action of the hydraulic pressure, the material tends to flow along the reflux pipe 22, the bellows 4, and the jet ring 41, which eventually increases the pressure in the liquid chamber 32, pushing the telescopic end to move downward, thereby scraping and cleaning the filter element 13. When it is difficult to scrape the solids attached to the filter element 13, the setting of the boost impact mechanism can enhance the cleaning effect of the scraper 3. Due to the effect of the boost, the impact force of the material when it is ejected from the injection hole 42 is strong, so the impact on the scraped filter element 13 is strengthened, and the cleaning effect of the filter element 13 can be further improved. In actual application, when there is an abnormal stagnation during the extension of the electric telescopic rod 51, that is, when the electric telescopic rod 51 has not reached the preset length, it is subjected to hydraulic reaction and cannot continue to operate. At this time, an alarm is issued through the pre-set control program to remind the staff to check the equipment for failure.

[0042] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving electric conveying pump for material proportioning, characterized by: The invention comprises a delivery pump body (1) and an anti-air load mechanism installed on the delivery pump body (1), wherein the delivery pump body (1) comprises a liquid inlet end (11) and a liquid outlet end (12), and a filter element (13) is embedded and installed on the liquid inlet end (11); The anti-air-load mechanism is mounted on the delivery pump body (1), and is used to prevent the delivery pump body (1) from being empty. The anti-air-load mechanism comprises: A pressure measuring tube (2), the pressure measuring tube (2) being installed on the liquid outlet end (12), a pressure drop stop device being installed in the pressure measuring tube (2), the pressure drop stop device being used to detect the water pressure in the liquid outlet end (12) and to control the delivery pump body (1) to stop according to the water pressure value; A flow storage box (21), wherein a flow storage box (21) is installed below the pressure measuring tube (2), and the flow storage box (21) is conductively connected to the pressure measuring tube (2); A reflux pipe (22) is installed at the bottom of the flow storage box (21), and one end of the reflux pipe (22) away from the flow storage box (21) is conductively connected to the liquid inlet end (11).

2. The energy-saving electric conveying pump for material proportioning according to claim 1, characterized in that: The pressure drop shutdown component includes a valve plate (23), an elastic component (6), an adjustment component (24) and a pressure sensor (25); The inner cavity of the pressure measuring tube (2) is designed in a stepped shape, the valve plate (23) and the elastic member (6) are installed in the inner cavity of the pressure measuring tube (2), the elastic member (6) is fixedly connected to the valve plate (23), and in the initial state, the valve plate (23) is installed at the stepped diameter change portion of the inner cavity of the pressure measuring tube (2); The adjusting member (24) is threadedly connected to the pressure measuring tube (2), the adjusting member (24) extends into the interior of the pressure measuring tube (2), the elastic member (6) is fixedly connected to the adjusting member (24), and the adjusting member (24) is used to adjust the initial pressure of the elastic member (6); The pressure sensor (25) is mounted on the adjusting member (24), the pressure sensor (25) is located between the adjusting member (24) and the elastic member (6), and the pressure sensor (25) is electrically connected to the delivery pump body (1).

3. The energy-saving electric conveying pump for material proportioning according to claim 2, characterized in that: The anti-air load mechanism further includes a flow blocking member (26) and a transmission rod (27); The flow storage box (21) is provided with a liquid storage hole (28) and a liquid flow hole (29) on both sides, and the flow storage box (21) is connected to the pressure measuring tube (2) and the return tube (22) through the liquid storage hole (28) and the liquid flow hole (29). The flow blocking member (26) is installed in the flow storage box (21), and the two ends of the flow blocking member (26) correspond to the liquid storage hole (28) and the liquid flow hole; The transmission rod (27) is fixedly mounted on the flow blocking member (26), the transmission rod (27) extends into the pressure measuring tube (2) through the liquid storage hole (28), and the transmission rod (27) is fixedly connected to the valve plate (23).

4. The energy-saving electric conveying pump for material proportioning according to claim 3 is characterized in that: Under normal delivery power, the flow blocking member (26) closes the liquid flow hole (29) and opens the liquid storage hole (28); under the initial state, the flow blocking member (26) closes the liquid storage hole (28) and opens the liquid flow hole (29).

5. An energy-saving electric conveying pump for material proportioning according to claim 1 or 4, characterized in that: It also includes a cleaning and dredging mechanism, which cooperates with the anti-air load mechanism and is used to dredge the filter element (13). The cleaning and dredging mechanism includes: A scraper (3), the scraper (3) being sleeved and mounted on the liquid inlet end (11), and the filter element (13) being located on a movement path of the scraper (3); A telescopic sleeve (31) is sleeved and mounted on the liquid inlet end (11), a liquid cavity (32) is formed between the telescopic sleeve (31) and the liquid inlet end (11), the return pipe (22) is conductively connected to the liquid cavity (32), the telescopic sleeve (31) is composed of a fixed end and a telescopic end, wherein the fixed end is fixedly connected to the liquid inlet end (11), and the telescopic end is slidably and sealingly connected to the fixed end, and the scraper (3) is fixedly mounted on the bottom of the telescopic end.

6. The energy-saving electric conveying pump for material proportioning according to claim 5, characterized in that: The scraper (3) and the telescopic end are both hollow in design, and the density of the scraper (3) and the telescopic end is less than the density of the conveying medium. The liquid inlet end (11) is designed with a closed bottom and an open side wall.

7. The energy-saving electric conveying pump for material proportioning according to claim 6, characterized in that: A bellows (4) is fixedly mounted between the telescopic end and the fixed end, a jet ring (41) is fixedly mounted on the telescopic end, and the jet ring (41) is provided with uniformly distributed injection holes (42). The inner cavities of the return pipe (22), the bellows (4), and the jet ring (41) are sequentially connected.

8. The energy-saving electric conveying pump for material proportioning according to claim 7, characterized in that: The injection holes (42) are all arranged at an angle, and the top ends of the injection holes (42) face the filter element (13).

9. The energy-saving electric conveying pump for material proportioning according to claim 8, characterized in that: It also includes a pressurized impact mechanism, which cooperates with the cleaning and dredging mechanism to enhance the cleaning and dredging effect of the filter element (13). The pressurized impact mechanism includes: A booster plate (5), the booster plate (5) being symmetrically mounted in the flow storage box (21), both ends of the booster plate (5) being connected to the inner wall of the flow storage box (21) via elastic membranes, and the booster plate (5) being used to increase the water pressure in the flow storage box (21); An electric telescopic rod (51), the electric telescopic rod (51) is located on a side wall of the flow storage box (21), the electric telescopic rod (51) corresponds to the supercharging plate (5) on a one-to-one basis, and the electric telescopic rod (51) is used to push the supercharging plate (5) to move.

10. The energy-saving electric conveying pump for material proportioning according to claim 9, characterized in that: A water level detector is installed in the current storage box (21), and the water level detector is electrically connected to the pressure sensor (25) and the electric telescopic rod (51) through a control program.

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