Portable plunger pump

Abstract

The utility model relates to the technical field of plunger pumps, in particular to a portable plunger pump, which comprises a plunger pump, a front-mounted pump body connected to the front end of the plunger pump and a control circuit. The front-mounted pump body is used for emptying air and cooperating with the plunger pump to work; the control circuit comprises a controller, a power source, a relay and a speed regulator, the power source, the relay and the speed regulator are connected with the controller, the power source is used for supplying power to the relay and the speed regulator, the relay is connected with the front-mounted pump body to open and close the front-mounted pump body, and the speed regulator is connected with the plunger pump to control the rotating speed of the plunger pump. The controller is connected with a current detection unit for monitoring the current change of the front pump body; the rated flow of the front-mounted pump body is 1.1 times larger than that of the plunger pump. The technical problem that when an existing portable plunger type water pump is started, the dry grinding condition occurs, and abrasion is caused is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger water pumps, in particular to a portable plunger pump. Background Art

[0002] At present, in the use of traditional portable plunger water pumps, the air inside the water pump needs to be emptied after each use to avoid water quality deterioration or equipment corrosion. For example, a portable handheld high-pressure plunger pump disclosed in Chinese patent application number: CN201821749492.4 includes: a valve body with an oil cavity opened along its axis, an oil inlet channel connected to the oil cavity opened at one end of the valve body, and an oil discharge channel connected to the oil cavity opened on the side wall of the valve body; a piston assembly arranged at the other end of the valve body, one end of the piston assembly is movably arranged in the oil cavity and can perform piston movement relative to the valve body; an oil inlet check valve arranged in the oil inlet channel, the oil inlet check valve can close or connect the oil cavity under the action of the piston assembly; and an oil discharge check valve arranged in the oil inlet channel, the oil discharge check valve can connect or close the oil cavity under the action of the piston assembly.

[0003] However, the process of emptying the air inside the water pump is not only cumbersome, but also causes the water pump to take a long time to empty the internal air before it can absorb water the next time it is used, causing dry grinding. Dry grinding not only increases the waiting time for startup, but also seriously increases the wear of the equipment. According to empirical estimates, dry grinding during startup accounts for almost 90% of equipment wear. Utility Model Content

[0004] Therefore, in view of the above-mentioned problems, the utility model proposes a portable plunger pump, which solves the technical problem that the existing portable plunger water pump has dry grinding and wear when starting.

[0005] To achieve the above object, the utility model adopts the following technical solutions: a portable plunger pump, comprising a plunger pump, a front pump body connected to the front end of the plunger pump and a control circuit;

[0006] The front pump body is used to exhaust the air and cooperate with the plunger pump;

[0007] The control circuit includes a controller and a power supply, a relay, and a speed regulator connected to the controller. The power supply is used to power the relay and the speed regulator. The relay is connected to the front pump body to realize the opening and closing of the front pump body. The speed regulator is connected to the plunger pump to realize the speed control of the plunger pump. The controller is connected to a current detection unit for monitoring the current change of the front pump body;

[0008] The rated flow of the front pump body is greater than 1.1 times the rated flow of the plunger pump.

[0009] Furthermore, the controller is connected to a voltage detection unit for monitoring the voltage change of the front pump body.

[0010] Furthermore, the voltage detection unit is arranged in parallel with the relay.

[0011] Furthermore, the front pump body is a diaphragm pump or a submersible centrifugal pump.

[0012] Furthermore, the current detection unit is arranged in series with the relay.

[0013] Furthermore, the controller is provided with a delay unit. When the plunger pump is started, the delay unit is started. The delay time of the delay unit is 3-10 seconds. When the delay time returns to zero, the relay is disconnected.

[0014] By adopting the above technical solution, the beneficial effects of the utility model are:

[0015] 1. Set a pre-pump body in front of the plunger pump. The pre-pump body can be a diaphragm pump, a submersible centrifugal pump or other conventional pump body. Before the plunger pump is started, the controller controls the relay to close, and the pre-pump body starts for a few seconds to quickly empty the air in the equipment. When the air is close to being exhausted, the load of the pre-pump body increases, and the motor current increases. After the controller captures this signal through the current detection unit, the controller starts the plunger pump and adjusts the speed through the speed regulator. In addition, the pre-pump body stops working after a delay period, and the preferred delay time is 5 seconds. Of course, if a larger head is required, the controller can also control the pre-pump body to work with the rear plunger pump until it stops.

[0016] Among them, when a diaphragm pump is used as the front pump body, it can provide better assistance when a larger head is needed, that is, effectively increase the total head. When a submersible centrifugal pump is used as the front pump body, the time to exhaust air can be shortened, allowing the plunger pump to discharge water faster.

[0017] 2. The voltage detection unit is used to assist the current detection unit in auxiliary detection, effectively improving the accuracy and safety of the detection. Among them, the current detection unit and the voltage detection unit are conventional components in this field. In addition, the voltage detection unit needs to be connected in parallel with the relay, and the current detection unit is connected in series with the relay. This setting can achieve a better control purpose.

[0018] 3. Set up a delay unit. The delay unit can be used to control the front pump body. For example, when the delay unit is triggered, the relay is closed, the front pump body starts for a few seconds first, and then the plunger pump starts, and the delay unit starts. The delay time of the delay unit is 3-10 seconds. When the delay time returns to zero, the relay is disconnected, that is, the diaphragm pump stops. When the delay unit is not triggered, the relay is closed, the front pump body starts for a few seconds first, and then the plunger pump starts, and the front pump body also keeps starting. Of course, it is necessary to set up touch screens, buttons and other peripheral panels to adjust the controller commands, such as switching the relay, triggering the delay unit, setting the delay time, controlling the speed regulator, etc., so as to achieve manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a structural schematic diagram of another embodiment of the utility model.

[0021] Reference numerals:

[0022] 1. Plunger pump; 2. Front pump body; 3. Controller; 31. Delay unit; 4. Power supply; 5. Relay; 6. Speed ​​regulator; 7. Current detection unit; 8. Voltage detection unit; 9. Water source. DETAILED DESCRIPTION

[0023] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0024] refer to Figure 1 , this embodiment provides a portable plunger pump 1, comprising a plunger pump 1, a front pump body 2 connected to the front end of the plunger pump 1, and a control circuit;

[0025] The front pump body 2 is used to exhaust air and cooperate with the work of the plunger pump 1;

[0026] The control circuit includes a controller 3 and a power supply 4, a relay 5, and a speed regulator 6 connected to the controller 3. The power supply 4 is used to supply power to the relay 5 and the speed regulator 6. The relay 5 is connected to the front pump body 2 to realize the opening and closing of the front pump body 2. The speed regulator 6 is connected to the plunger pump 1 to realize the speed control of the plunger pump 1. The controller 3 is connected to a current detection unit 7 for monitoring the current change of the front pump body 2;

[0027] The rated flow rate of the front pump body 2 is greater than 1.1 times the rated flow rate of the plunger pump 1, preferably 1.2 times, and the selectable range is 1.1-1.5 times. Thus, it is ensured that the air in the equipment can be quickly emptied at the initial start-up. Moreover, the rated flow rate of the front pump body is greater than the rated flow rate of the plunger pump, which can assist the plunger pump and increase the head.

[0028] The controller 3 is connected to a voltage detection unit 8 for monitoring the voltage change of the front pump body 2 .

[0029] The voltage detection unit 8 is arranged in parallel with the relay 5 .

[0030] The front pump body 2 is a diaphragm pump.

[0031] The current detection unit 7 is connected in series with the relay 5 .

[0032] The controller 3 is provided with a delay unit 31. When the plunger pump 1 is started, the delay unit 31 is started. The delay time of the delay unit 31 is 3-10 seconds, preferably 5 seconds. When the delay time returns to zero, the relay 5 is disconnected to ensure that the water flow can flow freely to the outlet to avoid water flow obstruction after the equipment stops.

[0033] The diaphragm pump is connected to the water source 10. The dotted box portion forms a control circuit, wherein the controller is a conventional technology in the art, and reference may be made to an electronic station sign environment intelligent controller disclosed in Chinese patent application number CN202223159576.1, or to an electric tricycle whole vehicle control circuit disclosed in Chinese patent application number CN201710906298.6.

[0034] Refer to Figure 2 Another implementation of this solution is that the front pump body 2 is a submersible centrifugal pump. The submersible centrifugal pump is submerged in the water source 10. The dotted line box selects the part forming the control circuit.

[0035] By adopting the above technical solution, the beneficial effects of the utility model are:

[0036] A pre-pump body 2 is arranged in front of the plunger pump 1, and the pre-pump body 2 can be a diaphragm pump, a submersible centrifugal pump or other conventional pump body. Before the plunger pump 1 is started, the controller 3 controls the relay 5 to close, and the pre-pump body 2 starts for a few seconds to quickly empty the air in the equipment. When the air is close to being emptied, the load of the pre-pump body 2 increases, and the motor current increases. After the controller 3 captures this signal through the current detection unit 7, the controller 3 starts the plunger pump 1 and adjusts the speed through the speed regulator 6. In addition, the pre-pump body 2 stops working after a delay period, and the preferred delay time is 5 seconds. Of course, if a larger head is required, the controller 3 can also control the pre-pump body 2 to work together with the rear end plunger pump 1 until it stops. The problem of dry grinding when the traditional water pump is started is solved, the water absorption capacity and service life of the equipment are improved, and the waiting time of the user is reduced.

[0037] When a diaphragm pump is used as the front pump body 2, it can provide better assistance when a larger head is needed, that is, effectively increase the total head. When a submersible centrifugal pump is used as the front pump body 2, the time for exhausting air can be shortened, so that the plunger pump 1 can discharge water faster.

[0038] The voltage detection unit 8 is used to cooperate with the current detection unit 7 for auxiliary detection, effectively improving the accuracy and safety of the detection. Among them, the current detection unit 7 and the voltage detection unit 8 are conventional components in the field. In addition, the voltage detection unit 8 needs to be connected in parallel with the relay 5, and the current detection unit 7 is connected in series with the relay 5. Such a setting can achieve a better control purpose.

[0039] A delay unit 31 is provided, and the control of the front pump body 2 can be realized through the delay unit 31. For example, when the delay unit 31 is triggered, the relay 5 is closed, the front pump body 2 starts for a few seconds first, and then the plunger pump 1 starts, and the delay unit 31 starts. The delay time of the delay unit 31 is 3-10 seconds. When the delay time returns to zero, the relay 5 is disconnected, that is, the diaphragm pump stops. When the delay unit 31 is not triggered, the relay 5 is closed, the front pump body 2 starts for a few seconds first, and then the plunger pump 1 starts, and the front pump body 2 also keeps starting. Of course, it is necessary to set up external panels such as touch screens and buttons to adjust the commands of the controller 3, such as the switch of the relay 5, the triggering of the delay unit 31, the setting of the delay time, the control of the speed regulator 6, etc., so as to realize manual operation.

[0040] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A portable plunger pump, characterized in that: It includes a plunger pump, a front pump body connected to the front end of the plunger pump, and a control circuit; The front pump body is used to exhaust the air and cooperate with the plunger pump; The control circuit includes a controller and a power supply, a relay, and a speed regulator connected to the controller. The power supply is used to power the relay and the speed regulator. The relay is connected to the front pump body to realize the opening and closing of the front pump body. The speed regulator is connected to the plunger pump to realize the speed control of the plunger pump. The controller is connected to a current detection unit for monitoring the current change of the front pump body; The rated flow of the front pump body is greater than 1.1 times the rated flow of the plunger pump.

2. A portable plunger pump according to claim 1, characterized in that: The controller is connected with a voltage detection unit for monitoring the voltage change of the front pump body.

3. A portable plunger pump according to claim 2, characterized in that: The voltage detection unit is arranged in parallel with the relay.

4. A portable plunger pump according to claim 1, characterized in that: The front pump body is a diaphragm pump or a submersible centrifugal pump.

5. A portable plunger pump according to claim 1, characterized in that: The current detection unit is arranged in series with the relay.

6. A portable plunger pump according to claim 1, characterized in that: The controller is provided with a delay unit. When the plunger pump is started, the delay unit is started. The delay time of the delay unit is 3-10 seconds. When the delay time returns to zero, the relay is disconnected.

Images