Quantitative water injection device for portable power supply

Abstract

The utility model provides a quantitative water injection device for a portable power supply, which belongs to the technical field of water injection pumps and comprises a pump body and a shell, a plunger cavity is arranged in the pump body, a piston is slidably connected in the plunger cavity, a piston rod of the piston is fixedly connected with a transmission rod, a direct current motor is arranged at one end of the shell far away from the pump body, and the direct current motor is connected with the plunger cavity. A screw is fixedly connected to an output shaft of the motor and is in threaded connection with the transmission rod, and a photoelectric switch and a photoelectric coded disc are arranged at the end, away from the screw, of the direct current motor. According to the utility model, the function of accurately and quantitatively injecting water into a container with certain pressure can be realized, and the portability of the portable fuel power supply is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water injection pumps, and in particular relates to a quantitative water injection device for a portable power source. Background Art

[0002] Today's portable fuel power supply designs often require one or two water injection pumps to supply water to the reactor and water tank respectively. According to the working requirements of the portable fuel power supply, the water injection pump often needs to meet the requirements of small size and light weight while supplying water in a quantitative manner to the reaction vessel with a certain pressure. However, most of the existing diaphragm pumps, peristaltic pumps and other water pumps cannot meet this requirement. Even if a few water pumps can meet the pressure requirements, they cannot achieve accurate quantitative water supply.

[0003] There are few references to special designs for water injection devices in existing portable power supply system solutions. Patent CN210919365U, for example, provides a universal plunger pump with a precision linear guide device. The benefit of this patent is that in order to achieve higher flow control accuracy of the plunger pump and maintain consistency in linear transmission during transmission, a set of precision linear slide pairs is added to the transmission method of direct connection between the screw and the nut in the existing plunger pump technology. The linear slide pair can effectively ensure the linear and stable transmission between the screw and the nut, greatly improving the stability of the flow accuracy of the plunger pump. At the same time, the wear between the screw and the nut is reduced, and the friction life between the screw and the nut is improved. However, this type of universal plunger pump pursues more accuracy in water injection, and is not suitable for portable fuel power sources in terms of volume and weight. Utility Model Content

[0004] In response to the defects or shortcomings in the existing technology, the utility model provides a quantitative water injection device for a portable power supply, which can realize the function of accurately injecting water into a container with a certain pressure and greatly improve the portability of the portable fuel power supply.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An embodiment of the utility model provides a quantitative water injection device for a portable power supply, including a pump body and a shell, a plunger cavity is provided in the pump body, a piston is slidably connected in the plunger cavity, the piston rod of the piston is fixedly connected to the transmission rod, a DC motor is provided at one end of the shell away from the pump body, a screw is fixedly connected to the output shaft of the motor, the screw is threadedly connected to the transmission rod, and a photoelectric switch and a photoelectric code disk are provided at one end of the DC motor away from the screw.

[0007] Furthermore, a pump body inlet and a pump body outlet are provided on an end surface of the pump body away from one end of the shell, and the pump body inlet and the pump body outlet are communicated with the plunger cavity.

[0008] Furthermore, a groove is provided on the side of the piston, and a sealing ring is placed in the groove.

[0009] Furthermore, a threaded through hole is provided at the axis of the transmission rod, and an external thread is provided on the outer side of the piston rod, which is fixedly connected to the transmission rod via the external thread.

[0010] Furthermore, a slider is fixedly connected to the outer side of one end of the transmission rod, and the slider is located inside the shell.

[0011] Furthermore, a guide groove is provided on the inner wall of the shell, the slider is placed in the guide groove, and the guide groove is arranged parallel to the axis of the shell.

[0012] Furthermore, slots are provided at both ends of the outer side wall of the shell, and limit switches are installed in the slots.

[0013] Furthermore, a packaging plate is provided on the end surface of the shell away from the pump body, the shell fixes the DC motor through the packaging plate, and a motor dust cover is provided on the outside of the DC motor.

[0014] Furthermore, the screw rod is inserted into the threaded through hole of the transmission rod and is threadedly connected to the threaded through hole.

[0015] Furthermore, the piston, the transmission rod, the screw and the output shaft of the DC motor are coaxially arranged.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The utility model sets a piston in the pump body, and the piston rod of the piston is rotatably connected to the DC motor through a transmission rod and a screw. The DC motor accurately controls the movement of the piston, thereby realizing the function of accurately and quantitatively injecting water into a container with a certain pressure.

[0018] 2. Using the quantitative water injection device provided by the present invention as a water injection pump in a portable fuel power supply and matching it with a solenoid valve can replace the water injection pump, water tank, one-way valve and other components in the portable fuel power supply, thereby simplifying the structure of the portable fuel power supply and reducing the volume and weight of the portable fuel power supply, thereby greatly improving the portability of the portable fuel power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the internal structure of the quantitative water injection device in the embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of the structure of the quantitative water injection device in the embodiment of the utility model;

[0021] Figure 3This is a diagram showing the position relationship between the input port and the output port in an embodiment of the present utility model;

[0022] Among them, 1. Pump body; 2. Piston; 3. Sealing ring; 4. Gasket; 5. Limit switch; 6. Housing; 7. Screw; 8. Transmission rod; 9. Slider; 10. Packaging board; 11. DC motor; 12. Photoelectric switch; 13. Motor dust cover; 14. Photoelectric encoder; 15. Positioning pin; 1011. Pump body input port; 1012. Pump body output port. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] A typical implementation of the present invention is as follows: Figure 1-Figure 3 As shown, a quantitative water injection device for a portable power supply includes a pump body 1 and a shell 6, which are fixedly connected by bolts. A gasket 4 is provided between the pump body 1 and the shell 6 for separating the pump body 1 from the shell 6. A plunger cavity is provided inside the pump body 1. In this embodiment, the plunger cavity is 100 ml. A pump body input port 1011 and a pump body output port 1012 are provided on the end face of the pump body 1 away from the shell 6. The pump body input port 1011 and the pump body output port 1012 are both connected to the plunger cavity, wherein the pump body input port 1011 is used to connect to an external water source, and the pump body output port 1012 is used to connect to an electromagnetic valve. A piston 2 is slidably connected to the inside of the plunger cavity, and liquid can be sucked into or discharged into the plunger cavity by means of the piston 2. A groove is provided on the side of the piston 2 for placing a sealing ring 3 to ensure the sealing between the piston 2 and the plunger cavity.

[0025] The outer side of the piston rod of the piston 2 is fixedly connected to a transmission rod 8. A threaded through hole is opened at the axis of the transmission rod 8. The outer side of the piston rod is provided with an external thread, which is fixedly connected to the transmission rod 8 through the external thread. The transmission rod 8 passes through the gasket 4 and extends into the interior of the housing 6. The outer side of the transmission rod 8 at one end inside the housing 6 is fixedly connected to a slider 9.

[0026] A guide groove is provided on the inner wall of the shell 6, and the slider 9 is placed in the guide groove. The slider 9 can move along the length direction of the guide groove, thereby realizing a sliding connection between the slider 9 and the shell 6. The guide groove is arranged parallel to the axis of the shell 6, so that the slider 9 can slide along the axis direction of the shell 6.

[0027] Slots are provided at both ends of the outer wall of the shell 6, and limit switches 5 are installed in the slots. The limit switches 5 are common limit switches on the market. When the slider 9 moves to the position of the limit switch 5, the limit switch 5 can sense the slider 9, thereby limiting the sliding of the slider 9.

[0028] A packaging plate 10 is provided on the end face of the shell 6 away from the pump body 1. The shell 6 is fixedly connected to the DC motor 11 through the packaging plate 10. A motor dust cover 13 is provided on the outside of the DC motor 11. The output shaft of the DC motor 11 passes through the packaging plate 10 and extends into the interior of the shell 6. The end of the output shaft of the DC motor 11 is connected to the screw 7 through a positioning pin 15.

[0029] The screw rod 7 is inserted into the threaded through hole of the transmission rod 8 and is threadedly connected to the threaded through hole. The piston 2, the transmission rod 8, the screw rod 7 and the output shaft of the DC motor 11 are coaxially arranged. When the output shaft of the DC motor 11 rotates, the transmission rod 8 is driven by the screw rod 7 to move toward the side of the pump body 1, thereby driving the slider 9 to slide along the guide groove. At the same time, the movement of the transmission rod 8 also drives the piston 2 to move in the plunger cavity, thereby sucking or discharging liquid into the plunger cavity.

[0030] A photoelectric switch 12 and a photoelectric encoder 14 are provided at one end of the DC motor 11 away from the output shaft. The photoelectric switch 12 can read the rotation angle of the DC motor 11 through the photoelectric encoder 14, thereby accurately controlling the rotation of the DC motor 11, and then accurately controlling the movement of the piston to realize the quantitative water injection function.

[0031] How it works

[0032] During operation, the output shaft of the DC motor 11 drives the screw 7 to start rotating. The transmission rod 8 threadedly connected to the screw 7 converts the rotational motion into linear motion under the action of the guide groove. As a result, the transmission rod 8 pulls the piston 2 to suck the liquid into the piston cavity. The photoelectric switch 12 on the motor shaft reads the photoelectric code disk 14 and starts to control the DC motor 11 to reverse after the motor shaft rotates a certain angle. The transmission rod 8 starts to push the piston 2 to transport the liquid to the connected container. This cycle repeats. The two limit switches 5 are responsible for ensuring the stroke of the transmission rod 8. If the transmission rod 8 exceeds the stroke, the two limit switches 5 will cut off the output of the motor.

[0033] The water injection device used in traditional portable fuel power supplies requires multiple components such as water injection pumps, water tanks, and one-way valves, which greatly affects the portability of the portable fuel power supply. The utility model arranges a piston in the pump body, and the piston rod of the piston is rotatably connected to the DC motor through a transmission rod and a screw. The liquid is first sucked into the piston cavity, and then the piston movement is accurately controlled by the DC motor, thereby realizing the function of the device to accurately and quantitatively inject water into a container with a certain pressure, replacing the water injection pump, water tank, one-way valve and other components in the portable fuel power supply, thereby achieving the purpose of simplifying the structure of the portable fuel power supply, reducing the volume and weight of the portable fuel power supply, and thus greatly improving the portability of the portable fuel power supply.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A quantitative water injection device for a portable power source, characterized in that: It includes a pump body and a shell, a plunger cavity is provided in the pump body, a piston is slidably connected in the plunger cavity, the piston rod of the piston is fixedly connected to the transmission rod, a DC motor is provided at the end of the shell away from the pump body, a screw is fixedly connected to the output shaft of the motor, the screw is threadedly connected to the transmission rod, and a photoelectric switch and a photoelectric code disk are provided at the end of the DC motor away from the screw.

2. A quantitative water injection device for a portable power source according to claim 1, characterized in that: A pump body input port and a pump body output port are provided on an end surface of the pump body away from one end of the shell, and the pump body input port and the pump body output port are communicated with the plunger cavity.

3. A quantitative water injection device for a portable power source according to claim 1, characterized in that: A groove is provided on the side of the piston, and a sealing ring is placed in the groove.

4. A quantitative water injection device for a portable power source according to claim 1, characterized in that: A threaded through hole is provided at the axis of the transmission rod, and an external thread is provided on the outer side of the piston rod, which is fixedly connected to the transmission rod via the external thread.

5. The quantitative water injection device for a portable power source according to claim 1, characterized in that: A slider is fixedly connected to the outer side of one end of the transmission rod, and the slider is located inside the shell.

6. A quantitative water injection device for a portable power source as claimed in claim 5, characterized in that: A guide groove is provided on the inner wall of the shell, the slider is placed in the guide groove, and the guide groove is arranged parallel to the axis of the shell.

7. The quantitative water injection device for a portable power source according to claim 1, characterized in that: Both ends of the outer side wall of the shell are provided with slots, and limit switches are installed in the slots.

8. The quantitative water injection device for a portable power source according to claim 1, characterized in that: A packaging plate is provided on the end surface of the shell away from the pump body, and the shell fixes the DC motor through the packaging plate. A motor dust cover is provided on the outer side of the DC motor.

9. The quantitative water injection device for a portable power source according to claim 4, characterized in that: The screw rod is inserted into the threaded through hole of the transmission rod and is threadedly connected with the threaded through hole.

10. The quantitative water injection device for a portable power source according to claim 1, characterized in that: The piston, the transmission rod, the screw and the output shaft of the DC motor are coaxially arranged.

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