Energy-saving electric conveying pump for material proportioning

Abstract

The application belongs to the technical field of variable volume pump equipment, and particularly relates to an energy-saving electric conveying pump for material proportioning, which comprises a conveying pump body and an anti-idling mechanism installed on the conveying pump body. In the material conveying process, on one hand, the pressure detection is associated with the controller countdown, so that the conveying pump body can not only start the shutdown program by itself when the liquid inlet end is short of material, but also can delay the shutdown, thereby maintaining the continuous operation of the conveying pump body when the material supply is delayed and the material supply rate is unstable, reducing the degree of frequent start and stop of the equipment, and reducing the start-up current energy consumption on the basis of complete material conveying. On the other hand, when the liquid outlet end is short of material, the material stored in the storage box is used to provide material supply for the conveying pump body, thereby reducing the idling degree of the conveying pump body in the delay shutdown process and relieving the problem of reduced service life of the conveying pump body caused by idling.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of variable displacement pump equipment, and particularly relates to an energy-saving electric conveying pump for material proportioning. BACKGROUND

[0002] The barrel pump is also called a plug-in barrel pump, and is mainly used for conveying various liquid media such as acid, alkali, solvent, additive, auxiliary agent, oil and other liquid media in barrels or containers. According to different driving modes, the barrel pump is divided into a hand-operated oil barrel pump, an electric oil barrel pump and a pneumatic oil barrel pump.

[0003] Because the barrel pumps are different in type and category, the pumping structures of the barrel pumps are not completely the same. Among them, the plunger pump and the centrifugal pump are mainstream. Therefore, during use, different use modes and different matters needing attention are required according to the types and categories of the barrel pumps, so as to realize normal use of the barrel pumps. Most of the barrel pumps cannot be operated for a long time in an empty state during normal use, because long-time empty running will cause abnormal temperature rise in the pump body. When the plunger pump is in an empty state, dry friction will occur between the reciprocating piston and the cylinder due to the lack of medium lubrication. Meanwhile, the mechanical seal will generate heat due to continuous friction under the condition of no medium cooling. When the centrifugal pump is in an empty state, cavitation will occur in the gap between the impeller and the pump shell due to the lack of medium. This empty running condition will not only accelerate the wear speed of key components such as bearings and sealing rings, but also may even cause deformation of the pump body or burning of the motor winding.

[0004] In the prior art, in order to prevent the barrel pump from being in an empty state due to insufficient raw materials in the barrel or other external factors, a pressure sensor is arranged to monitor the conveying medium pressure value in real time. When the pressure is detected to be lower than the set threshold value, the power supply is automatically cut off, so as to reduce the probability of the empty running and dry burning. However, when transporting liquid materials with a relatively viscous texture, it is found that the flow of the liquid materials with a viscous texture has hysteresis, so that the outlet pressure of the barrel pump fluctuates. Therefore, when the threshold value is set, if the threshold value is too high, the barrel pump will be frequently started and stopped, which not only affects the transportation of the materials, but also shortens the service life of the barrel pump due to frequent starting and stopping. If the threshold value is set too low, although the barrel pump is not easy to stop after being started, the barrel pump will be in an empty state, which also affects the service life of the barrel pump.

[0005] In view of this, the application provides an energy-saving electric conveying pump for material proportioning, which is used to solve the above technical problems. SUMMARY

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

[0007] The technical scheme adopted by the present application to solve its technical problems is: the energy-saving electric conveying pump for material proportioning comprises a conveying pump body and an anti-idling mechanism installed on the conveying pump body, the conveying pump body comprises a liquid inlet end and a liquid outlet end, and a filter is embeddedly installed on the liquid inlet end;

[0008] The anti-idling mechanism is installed on the conveying pump body, and is used for preventing the conveying pump body from being in an idle state.

[0009] A pressure measuring pipe is installed on the liquid outlet end, a pressure drop stop mechanism is installed in the pressure measuring pipe, the pressure drop stop mechanism is used for detecting the water pressure in the liquid outlet end and controlling the conveying pump body to stop according to the water pressure value.

[0010] A flow storage box is installed below the pressure measuring pipe and is in conductive connection with the pressure measuring pipe.

[0011] A backflow pipe is installed at the bottom of the flow storage box, and one end of the backflow pipe away from the flow storage box is in conductive connection with the liquid inlet end.

[0012] Preferably, the pressure drop stop mechanism comprises a valve piece, an elastic piece, an adjusting piece and a pressure sensor.

[0013] The inner cavity of the pressure measuring pipe is designed in a stepped shape, the valve piece and the elastic piece are installed in the inner cavity of the pressure measuring pipe, the elastic piece is fixedly connected with the valve piece, and the valve piece is installed at the stepped diameter position of the inner cavity of the pressure measuring pipe in an initial state.

[0014] The adjusting piece is screw-connected on the pressure measuring pipe, extends to the inside of the pressure measuring pipe, and is fixedly connected with the elastic piece, and is used for adjusting the initial pressure of the elastic piece.

[0015] The pressure sensor is installed on the adjusting piece, is located between the adjusting piece and the elastic piece, and is electrically connected with the conveying pump body.

[0016] Preferably, the anti-idling mechanism further comprises a flow resistance piece and a transmission rod.

[0017] The flow storage box is provided with a liquid storage hole and a liquid flow hole on both sides, and is in conductive connection with the pressure measuring pipe and the backflow pipe through the liquid storage hole and the liquid flow hole.

[0018] The flow resistance piece is installed in the flow storage box, and the flow resistance piece is correspondingly provided with the liquid storage hole and the liquid flow hole at both ends.

[0019] The transmission rod is fixedly installed on the flow resistance piece, extends to the inner cavity of the pressure measuring pipe through the liquid storage hole, and is fixedly connected with the valve piece.

[0020] Preferably, the flow blocking member closes the liquid flow hole and opens the liquid storage hole under the normal conveying power, and closes the liquid storage hole and opens the liquid flow hole in the initial state.

[0021] Preferably, the cleaning and dredging mechanism is further provided, which is matched with the anti-idling mechanism and used for dredging the filter element, and the cleaning and dredging mechanism comprises:

[0022] The scraper is sleeved and mounted on the liquid inlet end, and the filter element is located on the movement path of the scraper.

[0023] The telescopic sleeve is sleeved and mounted on the liquid inlet end, a liquid cavity is formed between the telescopic sleeve and the liquid inlet end, the reflux pipe is in conductive connection with the liquid cavity, the telescopic sleeve is composed of a fixed end and a telescopic end, the fixed end is fixedly connected with the liquid inlet end, and the telescopic end is in sliding sealing connection with the fixed end, and the scraper is fixedly installed at the bottom of the telescopic end.

[0024] Preferably, the scraper and the telescopic end are hollow, the density of the scraper and the telescopic end is less than the density of the conveying medium, and the bottom of the liquid inlet end is closed and the sidewall is open.

[0025] Preferably, the telescopic end is fixedly installed with a bellows between the telescopic end and the fixed end, a jet ring is fixedly installed on the telescopic end, the jet ring is provided with uniformly distributed jet holes, and the reflux pipe, the bellows and the inner cavity of the jet ring are in conductive connection.

[0026] Preferably, the jet holes are obliquely arranged, and the top end of the jet hole faces the filter element.

[0027] Preferably, the pressure boosting and impacting mechanism is further provided, which is matched with the cleaning and dredging mechanism to enhance the cleaning and dredging effect on the filter element, and the pressure boosting and impacting mechanism comprises:

[0028] The pressure boosting plate is symmetrically installed in the liquid storage box, and the two ends of the pressure boosting plate are connected with the inner wall of the liquid storage box through elastic membranes.

[0029] The electric telescopic rod is located on the sidewall of the liquid storage box, and the electric telescopic rod is in one-to-one correspondence with the pressure boosting plate.

[0030] Preferably, the water level detector is installed in the liquid storage box, and the water level detector, the pressure sensor and the electric telescopic rod are electrically connected through a control program.

[0031] The beneficial effects of the present application are as follows:

[0032] 1. The energy-saving electric conveying pump for material proportioning, by setting the anti-idling mechanism, the anti-idling mechanism is associated with the pressure drop shutdown part, in the material conveying process, on the one hand, through the pressure detection and the controller countdown, the conveying pump body can not only start the shutdown program when the liquid inlet end is short of material, but also can delay the shutdown, and then when the material supply exists hysteresis and the material supply rate is unstable, the continuous operation of the conveying pump body can be maintained, the degree of frequent start and stop of the equipment is reduced, on the basis of complete material conveying, the start-up frequency is reduced, and then the large current energy consumption of start-up is reduced, on the other hand, when the liquid outlet end is short of material, the material stored in the storage box is used to provide material supply for the conveying pump body, and then the idle degree of the conveying pump body in the delay shutdown process is reduced, and the problem of reducing the service life of the conveying pump body caused by idling is relieved.

[0033] 2. The energy-saving electric conveying pump for material proportioning, by setting the cleaning and dredging mechanism, the cleaning and dredging mechanism is matched with the anti-idling mechanism, when the pressure is reduced, on the one hand, through the descent of the telescopic end, the filter part is surrounded, when the material in the container is insufficient, the backflow material can be prevented from flowing outward, on the other hand, through the pressure and gravity of the backflow material, the scraper and the buoyancy of the telescopic end are matched, when the filter part is blocked, the filter part can be dredged, and the continuous conveying of the material is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0034] The application will be further described below with reference to the drawings.

[0035] Figure 1 is the overall perspective view of the application;

[0036] Figure 2 is the perspective view of the anti-idling mechanism of the application;

[0037] Figure 3 is the partial structure perspective view of the anti-idling mechanism;

[0038] Figure 4 is the sectional view of the storage box;

[0039] Figure 5 is the perspective view of the liquid inlet end;

[0040] Figure 6 is the split perspective view of the cleaning and dredging mechanism;

[0041] Figure 7 is the partial sectional view of the cleaning and dredging mechanism;

[0042] In the diagram: 1. Pump body; 11. Inlet; 12. Outlet; 13. Filter; 2. Pressure measuring tube; 21. Accumulator; 22. Return pipe; 23. Valve; 24. Adjusting component; 25. Pressure sensor; 26. Flow obstruction component; 27. Transmission rod; 28. Accumulation hole; 29. ​​Flow hole; 3. Scraper; 31. Telescopic sleeve; 32. Liquid chamber; 4. Bellows; 41. Jet ring; 42. Injection hole; 5. Pressure booster plate; 51. Electric telescopic rod; 6. Elastic component. Detailed Implementation

[0043] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0044] like Figures 1 to 7 As shown, the present invention provides an energy-saving electric conveying pump for material proportioning, which includes a conveying pump body 1 and an anti-dry-load mechanism installed on the conveying pump body 1. The conveying pump body 1 includes an inlet end 11 and an outlet end 12, and a filter element 13 is embedded in the inlet end 11.

[0045] The anti-dry-load mechanism is installed on the delivery pump body 1. The anti-dry-load mechanism is used to prevent the delivery pump body 1 from being unloaded. The anti-dry-load mechanism includes:

[0046] Pressure measuring tube 2 is installed on the liquid outlet 12. Pressure drop stop device is installed inside 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.

[0047] Storage box 21, a storage box 21 is installed below the pressure measuring tube 2, and the storage box 21 is electrically connected to the pressure measuring tube 2;

[0048] The reflux pipe 22 is installed at the bottom of the reservoir box 21, and the end of the reflux pipe 22 away from the reservoir box 21 is connected to the liquid inlet 11.

[0049] The pressure drop shutdown component includes a valve plate 23, an elastic element 6, an adjusting element 24, and a pressure sensor 25;

[0050] The inner cavity of the pressure measuring tube 2 is designed in a stepped shape. The valve plate 23 and the elastic element 6 are installed in the inner cavity of the pressure measuring tube 2. The elastic element 6 and the valve plate 23 are fixedly connected. In the initial state, the valve plate 23 is installed at the stepped diameter change position in the inner cavity of the pressure measuring tube 2.

[0051] 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.

[0052] The pressure sensor 25 is inlaid on the adjusting member 24, and is located between the adjusting member 24 and the elastic member 6, and is electrically connected with the conveying pump body 1.

[0053] The anti-idling mechanism further comprises a flow blocking member 26 and a transmission rod 27.

[0054] The storage and flow box 21 is provided with a liquid storage hole 28 and a liquid flow hole 29 on both sides respectively, and is connected with the pressure measuring pipe 2 and the backflow pipe 22 through the liquid storage hole 28 and the liquid flow hole 29 respectively.

[0055] The flow blocking member 26 is installed in the storage and flow box 21, and the two ends of the flow blocking member 26 correspond to the liquid storage hole 28 and the liquid flow hole.

[0056] The transmission rod 27 is fixedly installed on the flow blocking member 26, extends into the pressure measuring pipe 2 through the liquid storage hole 28, and is fixedly connected with the valve plate 23.

[0057] The flow blocking member 26 blocks the liquid flow hole 29 under the normal conveying power, and blocks the liquid storage hole 28 in the initial state, and in the present application, the normal conveying power is that the valve plate 23 moves under the hydraulic pressure, and the initial state is that the valve plate 23 is not moved by the hydraulic pressure, and in the present application, the diameter of the liquid storage hole 28 is larger than that of the liquid flow hole 29.

[0058] When the electric conveying pump is used to convey the liquid material in the barrel, tank or other container for material proportioning, the electric conveying pump is inserted into the liquid material through the opening of the container, and then the conveying pump body 1 is started to draw the material through the liquid inlet end 11 and discharge the material outside through the liquid outlet end 12, and during the continuous process, when the material in the container is conveyed or the flow of the material has hysteresis, the liquid inlet end 11 is insufficiently supplied with the material, in order to prevent the conveying pump body 1 from idling and being damaged, the anti-idling mechanism is provided in the present application, when the pressure of the liquid outlet end 12 is reduced, the preset program is started to start the countdown program of the stop of the conveying pump body 1, at the same time, the solution stored is conveyed to the liquid inlet end 11 to maintain the continuous conveying of the conveying pump body 1, thereby reducing the damage of the idling of the conveying pump body 1.

[0059] Specifically, in the material conveying process, when the electric conveying pump is inserted into the material, the material flows to the liquid inlet end 11 of the conveying pump body 1 under the action of hydraulic pressure, and when the conveying pump body 1 is started, the liquid continuously flows from the liquid inlet end 11 to the liquid outlet end 12, and the pipe matched with the conveying pump body 1 can realize the pumping of the material. In this process, when the material is pumped to the liquid outlet end 12, the material flows into the pressure measuring pipe 2 from the liquid outlet end 12. Since the gap between the valve plate 23 and the inner cavity of the pressure measuring pipe 2 is small in the initial state, the valve plate 23 gradually pushes the elastic element 6 under the hydraulic pressure of the material, so that the flow of the material in the pressure measuring pipe 2 increases. When the valve plate 23 moves, the flow resistance element 26 connected with the valve plate 23 through the transmission rod 27 moves synchronously. Since the flow resistance element 26 closes the liquid storage hole 28 when the valve plate 23 does not move, the liquid storage box 21 is disconnected with the pressure measuring pipe 2. With the increase of water pressure, the moving distance of the valve plate 23 gradually increases, so that the flow resistance element 26 gradually separates from the liquid storage hole 28, and the other end of the flow resistance element 26 gradually moves into the liquid flow hole 29. When the flow resistance element 26 completely separates from the liquid storage hole 28, the flow resistance element 26 has closed the liquid flow hole 29. At this time, the liquid storage box 21 is in communication with the pressure measuring pipe 2. When the material flows in the pressure measuring pipe 2, part of the material flows into the liquid storage box 21 under the action of hydraulic pressure and is stored until the liquid storage box 21 is completely filled.

[0060] When the elastic element 6 is pushed by the valve plate 23, the elastic element 6 is elastically deformed and accumulates elastic potential energy, so that the value of the pressure sensor 25 between the adjusting element 24 and the elastic element 6 changes, and the size of the hydraulic pressure in the pressure measuring pipe 2 is displayed in real time. In the present application, the pressure sensor 25 is electrically connected with the conveying pump body 1, that is, the pressure sensor 25 is electrically connected with the controller which is part of the conveying pump body 1. Under the control of the pre-set program, when the conveying pump body 1 is in the open state, when the value of the pressure sensor 25 is less than the pre-set threshold value, the controller starts the countdown, and when the countdown is zero, the conveying pump body 1 stops running (here, it is the conventional operation of the electric conveying pump control technology, which will not be described in detail here).

[0061] And in the countdown process, in order to maintain the flow state of the material in the conveying pump body 1, to avoid the phenomenon of empty load of the conveying pump body 1, when the hydraulic pressure in the pressure measuring pipe 2 is reduced, the elastic element 6 gradually releases the elastic potential energy, pushes the valve plate 23 to reset, and in this process, the movement of the valve plate 23 causes the flow blocking element 26 to reset synchronously, and as the movement proceeds, the flow blocking element 26 is separated from the liquid flow hole, causing the liquid storage box 21 to be communicated with the return pipe 22, 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 pipe 2 again under the action of the conveying pump body 1. Since the flow blocking element 26 closes the liquid storage hole 28 at this time, the material flows through the gap between the valve plate 23 and the cavity of the pressure measuring pipe 2, and by controlling the flow rate of the return pipe 22, the time length of the material in the liquid storage box 21 can be adjusted. Adjusting the proportion of the time length and the controller countdown time length can empty the liquid storage box 21 when the conveying pump body 1 is closed, and can also make the conveying pump body 1 not to rotate empty. When the controller countdown ends, the supply of material to the liquid inlet end 11 is restored, that is, in addition to the material returned by the return pipe 22, there is also material in the container to supplement the liquid inlet end 11. At this time, the flow rate of the liquid outlet end 12 increases, thereby increasing the flow rate of the conveying pump body 1, and further increasing the hydraulic pressure in the pressure measuring pipe 2, the pressure sensor 25 value changes, and the controller countdown resets. With the increase of the hydraulic pressure and the movement of the valve plate 23, the communication relationship between the liquid storage box 21 and the pressure measuring pipe 2 and the return pipe 22 changes, and the material in the liquid storage box 21 is accumulated again, so as to reduce the degree of empty load of the conveying pump body 1 when the hydraulic pressure is reduced next time.

[0062] The present application provides a material conveying pump, which comprises a conveying pump body 1, a liquid inlet end 11, a liquid outlet end 12, a pressure measuring pipe 2, a pressure sensor 25, a controller, a flow blocking element 26, a liquid storage box 21, a return pipe 22, an elastic element 6, a valve plate 23, a filter element 13, and a liquid storage hole 28.

[0063] As a preferred embodiment of the present application, a cleaning and dredging mechanism is further included, which cooperates with the anti-empty load mechanism, and is used for dredging the filter element 13. The cleaning and dredging mechanism comprises:

[0064] A scraper 3 is sleeved and mounted on the liquid inlet end 11, and the filter 13 is located on the movement path of the scraper 3.

[0065] 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 reflux pipe 22 is in communication connection with 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 with the liquid inlet end 11, and the telescopic end is in sliding sealing connection with the fixed end, and the scraper 3 is fixedly mounted on the bottom of the telescopic end.

[0066] The scraper 3 and the telescopic end are both hollow designs, the density of the scraper 3 and the telescopic end is less than the density of the conveying medium, and the bottom of the liquid inlet end 11 is closed and the side wall is open.

[0067] Since, during the conveying of the material, in order to avoid the damage of the solid particles such as the sediment and the agglomerate in the material to the equipment, the filter 13 (the type and aperture of the filter 13 are adjusted according to the properties of the conveyed material) is detachably embedded and mounted on the liquid inlet end 11, and as the material is continuously pumped, the sediment and the agglomerate may be attached to the filter 13, therefore, the cleaning and dredging mechanism is arranged in the present application, when the pressure value in the pressure measuring pipe 2 is reduced to a threshold value, at this time, the material in the flow storage box 21 flows to the liquid inlet end 11 through the reflux pipe 22, since the telescopic sleeve 31 and the scraper 3 are mounted on the liquid inlet end 11, 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 at this time, in the process of the liquid surface descending, the telescopic end and the scraper 3 automatically descend under the action of gravity, and in the process of descending, the filter 13 is scraped, when the material in the reflux pipe 22 flows into the telescopic liquid cavity 32, the descending of the telescopic end can wrap the filter 13, and then the material in the liquid cavity 32 flows into the inside of the liquid inlet end 11 through the filter 13, so as to prevent the outflow of the material.

[0068] If the reduction of the material pumping pressure at this time is caused by the insufficient supply of the material due to the blockage of the filter 13, since the flow storage box 21 is in communication with the liquid cavity 32, and the height of the flow storage box 21 is higher than the height of the liquid surface, therefore, the material in the flow storage box 21 flows into the liquid cavity 32 through the reflux pipe 22 under the action of gravity, and then pushes the telescopic end and the scraper 3 to move downward, the movement of the telescopic end and the scraper 3 realizes the scraping and cleaning of the filter 13, and when the material in the liquid cavity 32 is conveyed through the liquid inlet end 11, at this time, the telescopic end and the scraper 3 float up under the action of buoyancy, so that the filter 13 is exposed in the container again, the cleaned filter 13 can pass through the material again, and then the continuous conveying of the material is maintained.

[0069] The application sets the cleaning and dredging mechanism, which cooperates with the anti-empty mechanism, when the pressure is reduced, on one hand, the filter 13 is surrounded by the descending of the telescopic end, when the material in the container is insufficient, the backflow material can be prevented from flowing outward, on the other hand, the dredging of the filter 13 can be realized by the pressure and gravity of the backflow material, the float force of the scraper 3 and the telescopic end, when the filter 13 is blocked, the continuous conveying of the material is facilitated.

[0070] The telescopic end is fixedly installed with the bellows 4 between the telescopic end and the fixed end, the telescopic end is fixedly installed with the jet ring 41, the jet ring 41 is provided with the uniformly distributed jet holes 42, and the backflow pipe 22, the bellows 4 and the inner cavity of the jet ring 41 are sequentially and conductively connected.

[0071] The jet holes 42 are all inclinedly arranged, and the top end of the jet hole 42 faces the filter 13.

[0072] When the material flows back, it flows through the backflow pipe 22, the bellows 4 and the jet ring 41 in sequence and impacts on the filter 13, so that the small blockage on the filter 13 can be dredged.

[0073] As a preferred embodiment of the application, the application further comprises a pressurization impact mechanism, which cooperates with the cleaning and dredging mechanism to enhance the cleaning and dredging effect on the filter 13, and the pressurization impact mechanism comprises:

[0074] The pressurization plate 5 is installed in the flow storage box 21, the two ends of the pressurization plate 5 are connected with the inner wall of the flow storage box 21 through the elastic film, the pressurization plate 5 is used for increasing the water pressure in the flow storage box 21, in the embodiment, the number of the pressurization plate 5 is two, which are symmetrically distributed on the two sides of the flow storage box 21, and the two pressurization plates 5 cooperate with the elastic film to divide the flow storage box 21 into three cavities which are not conductively connected with each other, wherein the middle cavity is conductively connected with the liquid storage hole 28 and the liquid flow hole 29, and the electric telescopic rod 51 is respectively installed in the left and right two cavities;

[0075] The electric telescopic rod 51 is located on the side wall of the flow storage box 21, the electric telescopic rod 51 corresponds to the pressurization plate 5 one by one, and the electric telescopic rod 51 is used for pushing the pressurization plate 5 to move.

[0076] The water level detector is installed in the flow storage box 21, and the water level detector, the pressure sensor 25 and the electric telescopic rod 51 are electrically connected through the control program.

[0077] When the pressure sensor 25 value decreases to below the threshold, the controller shutdown program begins countdown, at the same time, the material in the storage box 21 returns through the return pipe 22, with the continuous return of the material, the water level detector detects that the water level in the storage box 21 continues to drop, at this time, the return material enters the corrugated pipe 4, the jet ring 41 from the return pipe 22, and slowly flows out from the spray hole 42, and in the process, if the water level detector detects that the water level is in a stagnant state, that is, the liquid level in the storage box 21 does not drop, at this time, it is judged that the return flow has an abnormal condition, 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 is extended, when the electric telescopic rod 51 is extended, the booster plate 5 is pushed to move, thereby making the liquid level in the storage box 21 rise first, then when the liquid level reaches the maximum value, the liquid pressure in the storage box 21 increases, under the action of the liquid pressure, the material has the tendency to flow along the return pipe 22, the corrugated pipe 4, the jet ring 41, and finally the pressure in the liquid cavity 32 increases, pushing the telescopic end to move downward, thereby scraping and cleaning the filter element 13, when the solid adhered to the filter element 13 is difficult to scrape, the setting of the booster impact mechanism can enhance the cleaning effect of the scraper 3, and due to the effect of the booster, the impact force of the material sprayed out of the spray hole 42 is strong, so the impact on the scraped filter element 13 is enhanced, which can further improve the cleaning effect of the filter element 13, and in actual application, when the electric telescopic rod 51 is extended and there is an abnormal stagnation, that is, the electric telescopic rod 51 cannot continue to run due to the action of the hydraulic pressure, at this time, an alarm is sent out through the pre-set control program, reminding the staff to check the fault of the equipment.

[0078] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An energy-saving electric conveying pump for material proportioning, characterized in that: It includes a pump body (1) and an anti-air load mechanism installed on the pump body (1). The pump body (1) includes an inlet end (11) and an outlet end (12). A filter element (13) is embedded in the inlet end (11). The anti-dry-load mechanism is installed on the conveying pump body (1), and the anti-dry-load mechanism is used to prevent the conveying pump body (1) from being unloaded. The anti-dry-load mechanism includes: Pressure measuring tube (2), the pressure measuring tube (2) is installed on the liquid outlet (12), and a pressure drop stop component is installed inside the pressure measuring tube (2). The pressure drop stop component is used to detect the water pressure inside the liquid outlet (12) and control the delivery pump body (1) to stop according to the water pressure value. A storage box (21) is installed below the pressure measuring tube (2), and the storage box (21) is electrically connected to the pressure measuring tube (2); The return pipe (22) is installed at the bottom of the reservoir box (21), and the end of the return pipe (22) away from the reservoir box (21) is connected to the liquid inlet (11). The pressure drop shutdown component includes a valve plate (23), an elastic element (6), an adjusting element (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 element (6) are installed in the inner cavity of the pressure measuring tube (2). The elastic element (6) and the valve plate (23) are fixedly connected. In the initial state, the valve plate (23) is installed at the stepped diameter change point in 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 inside 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), and 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).

2. The energy-saving electric conveying pump for material proportioning according to claim 1, characterized in that: The air defense mechanism also includes a flow-blocking component (26) and a transmission rod (27). The reservoir box (21) has a liquid storage hole (28) and a liquid flow hole (29) on both sides respectively. The reservoir 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-blocking component (26) is installed inside the flow storage box (21), and the two ends of the flow-blocking component (26) correspond to the liquid storage hole (28) and the liquid flow hole (29); The transmission rod (27) is fixedly installed on the flow-blocking component (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).

3. The energy-saving electric conveying pump for material proportioning according to claim 2, characterized in that: Under normal transmission power, the flow obstruction element (26) closes the liquid outlet (29) and opens the liquid storage hole (28). In the initial state, the flow obstruction element (26) closes the liquid storage hole (28) and opens the liquid outlet (29).

4. An energy-saving electric conveying pump for material proportioning according to claim 1 or 3, characterized in that: It also includes a cleaning and unblocking mechanism, which works in conjunction with the anti-aircraft mechanism. The cleaning and unblocking mechanism is used to unblock the filter element (13). The cleaning and unblocking mechanism includes: Scraper (3), the scraper (3) is sleeved and installed on the liquid inlet end (11), and the filter element (13) is located on the movement path of the scraper (3); 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 return pipe (22) is connected to the liquid cavity (32). The telescopic sleeve (31) consists of a fixed end and a telescopic end. The fixed end is fixedly connected to the liquid inlet end (11), and the telescopic end is slidably and sealed to the fixed end. The scraper (3) is fixedly installed at the bottom of the telescopic end.

5. The energy-saving electric conveying pump for material proportioning according to claim 4, characterized in that: Both the scraper (3) and the telescopic end are hollow. The density of both the scraper (3) and the telescopic end is less than the density of the conveying medium. The liquid inlet end (11) is closed at the bottom and open on the side wall.

6. The energy-saving electric conveying pump for material proportioning according to claim 5, characterized in that: A corrugated pipe (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) has uniformly distributed injection holes (42). The inner cavities of the return pipe (22), the corrugated pipe (4) and the jet ring (41) are sequentially connected.

7. The energy-saving electric conveying pump for material proportioning according to claim 6, characterized in that: All the spray holes (42) are inclined, and the top of the spray holes (42) faces the filter element (13).

8. The energy-saving electric conveying pump for material proportioning according to claim 7, characterized in that: It also includes a pressurizing and impacting mechanism, which works in conjunction with a cleaning and unblocking mechanism to enhance the cleaning and unblocking effect on the filter element (13). The pressurizing and impacting mechanism includes: A pressure booster plate (5) is symmetrically installed inside the storage box (21). Both ends of the pressure booster plate (5) are connected to the inner wall of the storage box (21) through an elastic membrane. The pressure booster plate (5) is used to increase the water pressure inside the storage box (21). Electric telescopic rod (51) is located on the side wall of the storage box (21). The electric telescopic rod (51) corresponds one-to-one with the booster plate (5). The electric telescopic rod (51) is used to push the booster plate (5) to move.

9. An energy-saving electric conveying pump for material proportioning according to claim 8, characterized in that: The storage box (21) is equipped with a water level detector, which is electrically connected to the pressure sensor (25) and the electric telescopic rod (51) through a control program.

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