阅读说明：本技术 电动泵 (Electric pump ) 是由 郭学光 王凯 刘吉哲 于 2021-09-01 设计创作，主要内容包括：本申请公开了一种电动泵,包括复合泵体和第一壳体,复合泵体包括：第一泵体,包括第一出液口；第二泵体,包括第二出液口；第一流道,一端与第二出液口相连,另一端与第一出液口相连；第二流道,与第二出液口相连；第一阀体,位于第一流道,用于控制第一流道的通断；第二阀体,位于第二流道,用于控制第二流道的通断；第一泵体、第一阀体和第二泵体通过第一流道连接于一体,第二阀体和第二泵体通过第二流道连接于一体,使第一泵体、第二泵体、第一阀体和第二阀体连接于一体；复合泵体位于第一壳体内,且第一壳体的侧壁设置有与第一出液口连通的设备接口。本申请提供的电动泵,能够极大地节省安装空间,还能避免漏油和压力内泄。(The application discloses electric pump, including the compound pump body and first casing, the compound pump body includes: the first pump body comprises a first liquid outlet; the second pump body comprises a second liquid outlet; one end of the first flow channel is connected with the second liquid outlet, and the other end of the first flow channel is connected with the first liquid outlet; the second flow channel is connected with the second liquid outlet; the first valve body is positioned in the first flow passage and used for controlling the on-off of the first flow passage; the second valve body is positioned in the second flow passage and used for controlling the on-off of the second flow passage; the first pump body, the first valve body and the second pump body are connected into a whole through a first flow channel, and the second valve body and the second pump body are connected into a whole through a second flow channel, so that the first pump body, the second pump body, the first valve body and the second valve body are connected into a whole; the compound pump body is located in the first shell, and the lateral wall of the first shell is provided with an equipment interface communicated with the first liquid outlet. The application provides an electric pump can save installation space greatly, can also avoid leaking in oil leak and the pressure.)

1. An electric pump comprising a composite pump body and a hollow first housing, the composite pump body comprising:

the first pump body comprises a first liquid outlet;

the second pump body comprises a second liquid outlet;

one end of the first flow channel is connected with the second liquid outlet, and the other end of the first flow channel is connected with the first liquid outlet;

one end of the second flow channel is connected with the second liquid outlet;

the first valve body is positioned in the first flow passage and used for controlling the on-off of the first flow passage;

the second valve body is positioned in the second flow passage and used for controlling the on-off of the second flow passage, and the state of the second valve body is opposite to that of the first valve body;

the first pump body, the first valve body and the second pump body are connected into a whole through the first flow passage, and the second valve body and the second pump body are connected into a whole through the second flow passage, so that the first pump body, the second pump body, the first valve body and the second valve body are connected into a whole; the compound pump body is located in the first shell, the side wall of the first shell is provided with an equipment interface communicated with the first liquid outlet, and the equipment interface is used for being connected with equipment.

2. The electric pump of claim 1,

the first pump body comprises a first rod body, the second pump body comprises a second rod body, and the first rod body and the second rod body are arranged in parallel; the electric pump also comprises a motor, the motor comprises an output shaft, the output shaft is used for driving the first rod body and the second rod body simultaneously, and the first rod body and the output shaft are vertically arranged; the diameter of the second rod body is larger than that of the first rod body, the length of the second rod body is equal to that of the first rod body, and the first rod body and the second rod body are arranged in an aligned mode.

3. The electric pump of claim 2, wherein the first pump body comprises a first liquid inlet, the second pump body comprises a second liquid inlet, and the first liquid inlet and the second liquid inlet are oriented in the same direction; the electric pump further includes:

a first oil tank;

one end of the liquid inlet flow channel is connected with the first oil tank, and the other end of the liquid inlet flow channel is connected with the first liquid inlet and the second liquid inlet;

and one end of the liquid outlet flow channel is connected with the first liquid outlet, and the other end of the liquid outlet flow channel is the equipment interface.

4. The electric pump of claim 3, further comprising:

the third flow channel is connected with the first liquid outlet;

the third valve body is positioned in the third flow channel and used for controlling the on-off of the third flow channel;

when the pressure of the equipment is lower than a first preset value, the second valve body is closed, the first valve body is opened, and the liquid in the second liquid outlet flows into the liquid outlet flow channel; when the pressure of the equipment is higher than a first preset value, the second valve body is opened, the first valve body is closed, and the liquid of the second liquid outlet flows out of the second valve body;

when the pressure of the equipment is lower than a second preset value, the third valve body is closed, and the liquid of the first liquid outlet flows out of the second valve body; when the pressure of the equipment is higher than a second preset value, the third valve body is opened, and the liquid of the first liquid outlet flows out of the third valve body; the second predetermined value is greater than the first predetermined value.

5. The electric pump of claim 4,

one end of the second flow channel is connected with the second liquid outlet, and the other end of the second flow channel is connected with the first oil tank;

and/or one end of the third flow channel is connected with the first liquid outlet, and the other end of the third flow channel is connected with the first oil tank.

6. The electric pump of claim 3,

a fourth valve body is arranged at one end of the liquid outlet flow channel connected with the first liquid outlet, and the fourth valve body is a one-way valve and allows liquid to flow into the liquid outlet flow channel;

a fifth valve body is arranged at one end of the liquid inlet flow channel, which is connected with the first liquid inlet, and the fifth valve body is a one-way valve and allows liquid to flow into the first liquid inlet from the liquid inlet flow channel; and a sixth valve body is arranged at one end of the liquid inlet flow channel connected with the second liquid inlet, and the sixth valve body is a one-way valve and allows liquid to flow into the second liquid inlet from the liquid inlet flow channel.

7. The electric pump of claim 6,

the orientation of the fourth valve body is vertical to the extending direction of the first rod body; the orientation of the fifth valve body and the sixth valve body is parallel to the extending direction of the first rod body.

8. The electric pump of claim 2, including first and second opposing ends and a side surface between the first and second ends, the electric pump comprising:

a first end cap at the first end;

the first cylinder is connected with the first end cover and one side, facing the first end cover, of the first shell, and the motor is located in the first cylinder;

the pump plate is positioned in the first shell and fixedly connected with the motor, and the first pump body and the second pump body are arranged on one side of the pump plate, which is far away from the motor;

the adapter plate is connected with one side of the first shell, which is far away from the first cylinder barrel;

the second cylinder barrel is connected with one side of the adapter plate, which is far away from the pump plate, a second oil tank is arranged in the second cylinder barrel, and an opening of the second oil tank is connected with the adapter plate;

and the second end cover is positioned at the second end and is connected with one side of the second cylinder, which deviates from the adapter plate.

9. The electric pump of claim 8, wherein a third liquid inlet is provided on a side surface of the electric pump, the third liquid inlet having an open state and a closed state; and when the third liquid inlet is in the open state, an external liquid source is communicated with the second oil tank through the third liquid inlet.

10. The electric pump of claim 8,

the central axes of the first shell, the first cylinder barrel and the second cylinder barrel are positioned on the same straight line; the first shell is detachably connected with the first cylinder barrel, and the first shell is detachably connected with the second cylinder barrel;

and/or the second oil tank is connected with the adapter plate through a hoop.

Technical Field

The application relates to the technical field of power pumps, in particular to an electric pump.

Background

Along with the improvement of the fire-fighting hydraulic breaking industry, the power source needs to be more and more portable for the firefighter to work smoothly and conveniently. The plunger is used as the core of the power source, and the design of the plunger is particularly important.

Various power sources on the market today are designed with two-stage pumps, including high pressure and low pressure plungers, in pursuit of fast operation of the equipment. The two plungers simultaneously deliver flow to the apparatus when the operating pressure is relatively low, thereby allowing the apparatus to operate more quickly. When the set pressure value is reached, the high-pressure plunger plugs the one-way valve assembly, so that the flow of the low-pressure plunger flows back to the oil tank.

However, the power source of the secondary pump structure requires a large installation space, and a large number of sealing structures are required for installing each component, so that the power source loses working capacity if any one of the components fails.

Disclosure of Invention

The technical problem that this application mainly solved provides an electric pump, can greatly save installation space, can also avoid leaking in oil leak and the pressure.

In order to solve the technical problem, the application adopts a technical scheme that: there is provided an electric pump comprising a composite pump body and a hollow first housing, the composite pump body comprising:

the first pump body comprises a first liquid outlet;

the second pump body comprises a second liquid outlet;

one end of the first flow channel is connected with the second liquid outlet, and the other end of the first flow channel is connected with the first liquid outlet;

one end of the second flow channel is connected with the second liquid outlet;

the first valve body is positioned in the first flow passage and used for controlling the on-off of the first flow passage;

the second valve body is positioned in the second flow passage and used for controlling the on-off of the second flow passage, and the state of the second valve body is opposite to that of the first valve body;

the first pump body, the first valve body and the second pump body are connected into a whole through the first flow passage, and the second valve body and the second pump body are connected into a whole through the second flow passage, so that the first pump body, the second pump body, the first valve body and the second valve body are connected into a whole; the compound pump body is located in the first shell, the side wall of the first shell is provided with an equipment interface communicated with the first liquid outlet, and the equipment interface is used for being connected with equipment.

Further, the first pump body comprises a first rod body, the second pump body comprises a second rod body, and the first rod body and the second rod body are arranged in parallel; the electric pump also comprises a motor, the motor comprises an output shaft, the output shaft is used for driving the first rod body and the second rod body simultaneously, and the first rod body and the output shaft are vertically arranged; the diameter of the second rod body is larger than that of the first rod body, the length of the second rod body is equal to that of the first rod body, and the first rod body and the second rod body are arranged in an aligned mode.

Further, the first pump body comprises a first liquid inlet, the second pump body comprises a second liquid inlet, and the first liquid inlet and the second liquid inlet are in the same direction; the electric pump further includes:

a first oil tank;

one end of the liquid inlet flow channel is connected with the first oil tank, and the other end of the liquid inlet flow channel is connected with the first liquid inlet and the second liquid inlet;

and one end of the liquid outlet flow channel is connected with the first liquid outlet, and the other end of the liquid outlet flow channel is the equipment interface.

Further, the electric pump further includes:

the third flow channel is connected with the first liquid outlet;

the third valve body is positioned in the third flow channel and used for controlling the on-off of the third flow channel;

when the pressure of the equipment is lower than a first preset value, the second valve body is closed, the first valve body is opened, and the liquid in the second liquid outlet flows into the liquid outlet flow channel; when the pressure of the equipment is higher than a first preset value, the second valve body is opened, the first valve body is closed, and the liquid of the second liquid outlet flows out of the second valve body;

when the pressure of the equipment is lower than a second preset value, the third valve body is closed, and the liquid of the first liquid outlet flows out of the second valve body; when the pressure of the equipment is higher than a second preset value, the third valve body is opened, and the liquid of the first liquid outlet flows out of the third valve body; the second predetermined value is greater than the first predetermined value.

Furthermore, one end of the second flow channel is connected with the second liquid outlet, and the other end of the second flow channel is connected with the first oil tank;

and/or one end of the third flow channel is connected with the first liquid outlet, and the other end of the third flow channel is connected with the first oil tank.

Furthermore, a fourth valve body is arranged at one end of the liquid outlet flow channel connected with the first liquid outlet, and the fourth valve body is a one-way valve and allows liquid to flow into the liquid outlet flow channel;

a fifth valve body is arranged at one end of the liquid inlet flow channel, which is connected with the first liquid inlet, and the fifth valve body is a one-way valve and allows liquid to flow into the first liquid inlet from the liquid inlet flow channel; and a sixth valve body is arranged at one end of the liquid inlet flow channel connected with the second liquid inlet, and the sixth valve body is a one-way valve and allows liquid to flow into the second liquid inlet from the liquid inlet flow channel.

Further, the orientation of the fourth valve body is perpendicular to the extending direction of the first rod body; the orientation of the fifth valve body and the sixth valve body is parallel to the extending direction of the first rod body.

Further, the electric pump includes first and second opposing ends and a side surface between the first and second ends, the electric pump including:

a first end cap at the first end;

the first cylinder is connected with the first end cover and one side, facing the first end cover, of the first shell, and the motor is located in the first cylinder;

the pump plate is positioned in the first shell and fixedly connected with the motor, and the first pump body and the second pump body are arranged on one side of the pump plate, which is far away from the motor;

the adapter plate is connected with one side of the first shell, which is far away from the first cylinder barrel;

the second cylinder barrel is connected with one side of the adapter plate, which is far away from the pump plate, a second oil tank is arranged in the second cylinder barrel, and an opening of the second oil tank is connected with the adapter plate;

and the second end cover is positioned at the second end and is connected with one side of the second cylinder, which deviates from the adapter plate.

Further, a third liquid inlet is arranged on the side surface of the electric pump, and the third liquid inlet has an open state and a closed state; and when the third liquid inlet is in the open state, an external liquid source is communicated with the second oil tank through the third liquid inlet.

Furthermore, the central axes of the first shell, the first cylinder and the second cylinder are positioned on the same straight line; the first shell is detachably connected with the first cylinder barrel, and the first shell is detachably connected with the second cylinder barrel;

and/or the second oil tank is connected with the adapter plate through a hoop.

Different from the prior art, the beneficial effects of the application are that:

the electric pump provided by the embodiment of the application, first pump body, first valve body and second pump body connect in an organic whole through first runner, second valve body and second pump body connect in an organic whole through the second runner, make first pump body, the second pump body, first valve body and second valve body connect in an organic whole, realized fusing first pump body, the second pump body, first valve body and second valve body in a small-size module, thereby can save installation space greatly, can also avoid leaking in oil leak and the pressure.

In addition, set up the equipment interface in the lateral wall of first casing, be convenient for make other pipelines of equipment interface connection and equipment instrument, make things convenient for taking of this electric pump to move, reduced the damage risk, when this electric pump is used for connecting rescue instrument, can provide very big facility for rescue work.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

fig. 1 is a partial schematic structural view of an electric pump provided in the present embodiment;

FIG. 2 is a perspective view of FIG. 1 from another perspective;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a left side view of FIG. 3;

fig. 5 is a schematic view of the overall structure of an electric pump provided in the present embodiment, which is a perspective view that may show a part of the internal structure;

FIG. 6 is a schematic view of the structure of FIG. 5 from another perspective;

fig. 7 is a partial structural schematic diagram of fig. 5.

Description of reference numerals:

1. a first pump body; 2. a second pump body; 3. a first flow passage; 31. a first stage; 32. a second stage; 4. a first valve body; 5. a second valve body; 6. a first rod body; 7. a second rod body; 8. a return spring; 9. a second housing; 10. a third housing; 11. a fourth valve body; 12. a fifth valve body; 13. a sixth valve body; 14. a motor; 15. an output shaft; 16. a first housing; 17. a second oil tank; 18. a composite pump body; 19. a first end; 20. a second end; 21. a side surface; 22. an equipment interface; 23. a first end cap; 24. a second end cap; 25. a first cylinder; 26. an adapter plate; 27. a second cylinder; 28. a third liquid inlet; 29. a third valve body; x, the first direction.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The power source with the two-stage pump structure generally needs to be additionally provided with a low-pressure plunger assembly, a conversion valve assembly and a one-way valve assembly beside a high-pressure plunger assembly, and some power sources need to be additionally provided with an oil suction valve assembly. Such a design not only requires a large installation space, but also requires a large number of sealing structures for the installation of each component, which would cause the power source to lose its working capacity if any one of them fails. In order to solve the problem, the present application provides an electric pump, can fuse first pump body 1, second pump body 2, first valve body 4 and second valve body 5 in a small-size module to practice thrift installation space.

Please refer to fig. 1 to 7. The present embodiment provides an electric pump including a composite pump body 18 and a hollow first housing 16. The composite pump body 18 includes a first pump body 1, a second pump body 2, a first flow passage 3, a second flow passage, a first valve body 4, and a second valve body 5.

Wherein, the first pump body 1 includes a first liquid outlet (not shown). The second pump body 2 comprises a second liquid outlet (not shown). One end of the first flow passage 3 is connected with the second liquid outlet, and the other end is connected with the first liquid outlet. One end of the second flow passage is connected with the second liquid outlet. The first valve body 4 is located in the first flow passage 3 and is used for controlling the on-off of the first flow passage 3. The second valve body 5 is positioned in the second flow passage and used for controlling the on-off of the second flow passage. The state of the second valve body 5 is opposite to the state of the first valve body 4. The first pump body 1, the first valve body 4 and the second pump body 2 are connected into a whole through the first flow channel 3, and the second valve body 5 and the second pump body 2 are connected into a whole through the second flow channel, so that the first pump body 1, the second pump body 2, the first valve body 4 and the second valve body 5 are connected into a whole. The compound pump body 18 is located in the first housing 16, and the side wall of the first housing 16 is provided with an equipment interface 22 communicated with the first liquid outlet, and the equipment interface 22 is used for being connected with equipment.

The electric pump provided by the embodiment of the application realizes that the first pump body 1, the second pump body 2, the first valve body 4 and the second valve body 5 are fused in a small module, thereby greatly saving the installation space, avoiding internal leakage of oil leakage and pressure, and preventing the power source from being too large and having too many hidden dangers.

Still, set up equipment interface 22 in the lateral wall of first casing 16, be convenient for make equipment interface 22 connect other pipelines and equipment instrument, make things convenient for taking of this electric pump to move, reduced the damage risk, when this electric pump is used for connecting the rescue instrument, can provide very big facility for rescue work.

In this embodiment, the first pump body 1 includes a first rod 6, the first liquid outlet is located at one side of the extending direction of the first rod 6, the second pump body 2 includes a second rod 7, and the second liquid outlet is located at one side of the extending direction of the second rod 7. The electric pump further comprises an electric motor 14 for driving the first pump body 1 and the second pump body 2. As shown in fig. 7, the motor 14 includes an output shaft 15, and the output shaft 15 is used for driving the first rod 6 and the second rod 7. The first rod body 6 and the second rod body 7 are arranged in parallel, and the first rod body 6 and the output shaft 15 are vertically arranged, so that the structure of the electric pump can be optimized, and the installation space of the electric pump is reduced. As shown in fig. 2, a return spring 8 may be disposed outside the first rod 6 and the second rod 7 along the axial direction for assisting the first rod 6 and the second rod 7 to return.

Further, as shown in fig. 1 and fig. 3, the diameter of the second rod 7 is greater than the diameter of the first rod 6, the length of the second rod 7 is equal to the length of the first rod 6, and the first rod 6 and the second rod 7 are aligned, so that the flow output by the first pump body 1 is smaller than the flow output by the second pump body 2, that is, the first pump body 1 is a high-pressure plunger pump, and the second pump body 2 is a low-pressure plunger pump.

In this embodiment, the first pump body 1 includes a first liquid inlet (not shown), the second pump body 2 includes a second liquid inlet (not shown), and the first liquid inlet and the second liquid inlet are oriented in the same direction, so that the structure of the electric pump can be optimized and the installation space thereof can be reduced.

As shown in fig. 1, the first pump body 1 comprises a second casing 9 and the second pump body 2 comprises a third casing 10. The first rod body 6, the first liquid inlet and the first liquid outlet are positioned in the second shell body 9, and the second rod body 7, the second liquid inlet and the second liquid outlet are positioned in the third shell body 10. First inlet and first liquid outlet are located the 6 axial one sides of the first body of rod, and second inlet and second liquid outlet are located the 7 axial one sides of the second body of rod, because the first body of rod 6 and the 7 alignment settings of the second body of rod, first inlet, first liquid outlet, second inlet and second liquid outlet are located the first body of rod 6 and the 7 same one side along the axial of the second body of rod respectively.

As shown in fig. 1, the second casing 9 and the third casing 10 are arranged in the first direction X. The electric pump has opposite first and second sides (not shown) in a direction perpendicular to the first direction X and perpendicular to the axial direction of the first rod 6. The third casing 10 is provided with a first outlet and a second outlet (not shown) at a first side and a second side, respectively. The second housing 9 is provided with a third outlet (not shown) at a side facing away from the third housing 10 in the first direction X. The first flow passage 3 is communicated with the second liquid outlet through a first outlet, the first flow passage 3 is communicated with the second liquid outlet through a third outlet, and the second flow passage is communicated with the second liquid outlet through a second outlet.

As shown in fig. 1 and 4, the first flow channel 3 may be substantially L-shaped, that is, the first flow channel 3 at least has a first section 31 extending along the first direction X and a second section 32 extending along a direction from the first side to the second side (perpendicular to the first direction X), so that the first pump body 1 and the second pump body 2 can be integrally connected.

In this embodiment, the electric pump may further include a first oil tank, an inlet fluid passage, and an outlet fluid passage (not shown). One end of the liquid inlet flow channel is connected with the first oil tank, and the other end of the liquid inlet flow channel is connected with the first liquid inlet and the second liquid inlet. One end of the liquid outlet flow passage is connected with the first liquid outlet, and the other end of the liquid outlet flow passage is provided with an equipment interface 22 for connecting with equipment, so that the electric pump can provide hydraulic pressure for the equipment.

In a preferred embodiment, the electric pump may further include a third flow passage (not shown) and a third valve body 29. The third flow passage is connected with the first liquid outlet. The third valve body 29 is located in the third flow passage and is used for controlling the on-off of the third flow passage.

The third valve element 29 according to the embodiment of the present invention is not limited in position, and may be provided integrally with the first pump body 1, the second pump body 2, the first valve element 4, and the second valve element 5, or may be provided separately. In view of the compact space obtained by integrating the first pump body 1, the second pump body 2, the first valve body 4, and the second valve body 5, it is preferable that the third valve body 29 be provided in the electric pump alone, as shown in fig. 6, in order not to affect the functions of the respective members.

In this embodiment, when the pressure of the apparatus is lower than the first predetermined value, the second valve body 5 is closed, the first valve body 4 is opened, and the liquid of the second liquid outlet flows into the liquid outlet channel. When the pressure of the device is higher than a first preset value, the second valve body 5 is opened, the first valve body 4 is closed, and the liquid of the second liquid outlet flows out of the second valve body 5.

When the pressure of the device is lower than a second predetermined value, the third valve body 29 is closed, and the liquid of the first liquid outlet flows out of the second valve body 5; when the pressure of the apparatus is higher than a second predetermined value, the third valve body 29 opens and the liquid of the first liquid outlet flows out of the third valve body 29. The second predetermined value is greater than the first predetermined value.

In this embodiment, one end of the second flow channel is connected to the second liquid outlet, and the other end of the second flow channel is connected to the first oil tank. One end of the third flow channel is connected with the first liquid outlet, and the other end of the third flow channel is connected with the first oil tank. In the axial direction of the first rod body 6, the first oil tank may be located at one side of the first liquid inlet, the first liquid outlet, the second liquid inlet and the second liquid outlet, which faces away from the first rod body 6 (or the second rod body 7).

In this embodiment, the first valve body 4 is a one-way valve, which only allows liquid to flow from the second liquid outlet to the first liquid outlet. The second valve body 5 is a one-way valve and only allows liquid to flow out from the second liquid outlet to the second flow passage.

Specifically, a fourth valve body 11 is arranged at one end of the liquid outlet flow channel connected with the first liquid outlet, and the fourth valve body 11 is a one-way valve and only allows liquid to flow into the liquid outlet flow channel. The fourth valve body 11 is oriented perpendicular to the extending direction of the first rod 6.

In this embodiment, a fifth valve body 12 is disposed at one end of the liquid inlet flow channel connected to the first liquid inlet, and the fifth valve body 12 is a one-way valve and only allows liquid to flow into the first liquid inlet from the liquid inlet flow channel. And a sixth valve body 13 is arranged at one end of the liquid inlet flow channel connected with the second liquid inlet, and the sixth valve body 13 is a one-way valve and allows liquid to flow into the second liquid inlet from the liquid inlet flow channel. The fifth valve body 12 and the sixth valve body 13 are oriented parallel to the extending direction of the first rod 6.

Wherein, the fifth valve body 12 and the sixth valve body 13 can be used as oil suction valve, and the fourth valve body 11 can be used as oil discharge valve. The third valve body 29 may function as a high-pressure relief valve.

In a specific application scenario, oil enters the first pump body 1 from the fifth valve body 12, is pressed into the fourth valve body 11 by the first rod body 6 to enter equipment to work, and simultaneously enters the second pump body 2 from the sixth valve body 13 and is extruded by the second rod body 7, passes through the first valve body 4 of the first flow channel 3, is converged with liquid flowing out of the first liquid outlet, enters the fourth valve body 11 and then enters the equipment to work, and the pressure value provided by the electric pump is smaller than a first preset value.

When the pressure value required by the equipment is increased to a first preset value (namely the rated pressure of the second valve body 5), the first valve body 4 is closed, the first flow passage 3 is blocked, so that the liquid flowing out of the second liquid outlet cannot be converged with the liquid flowing out of the first liquid outlet, the second valve body 5 is opened, the second flow passage circulates, the liquid flowing out of the second liquid outlet enters the first oil tank through the second flow passage at the moment, and the pressure value provided by the electric pump is larger than the first preset value and smaller than the second preset value at the moment.

If the pressure value of the device continues to rise and reaches the second predetermined value (i.e. the set value of the third valve body 29), the third valve body 29 opens, and the excess pressure flow will flow back to the first tank through the third flow passage.

As shown in fig. 5, the electric pump includes opposite first and second ends 19 and 20 and a side surface 21 between the first and second ends 19 and 20, the length of the side surface 21 from the first end 19 to the second end 20 being greater than the diameter of the surface of the first end 19. The device interface 22 is located on the side surface 21. The electric pump may further include a first end cap 23, a first cylinder 25, a pump plate, an adapter plate 26, a second cylinder 27, and a second end cap 24.

Wherein the first end cap 23 is located at the first end 19. A first cylinder 25 is connected to the first end cap 23 and to a side of the first housing 16 facing the first end cap 23, and the motor 14 is located within the first cylinder 25. The pump plate is located first casing 16, and pump plate and motor 14 looks fixed connection, and the first pump body and the second pump body are installed in the pump plate and are kept away from one side of motor 14. The adapter plate 26 is connected to the side of the first housing 16 facing away from the first cylinder 25. The second cylinder 27 is connected with one side of the adapter plate 26 departing from the pump plate, a second oil tank 17 is arranged in the second cylinder 27, and an opening of the second oil tank 17 is connected with the adapter plate 26. A second end cap 24 is located at the second end 20 and is connected to a side of the second cylinder 27 facing away from the adapter plate 26.

In a preferred embodiment, the central axes of the first housing 16, the first cylinder 25 and the second cylinder 27 are located on the same line. The first end cover 23, the first cylinder 25, the first shell 16, the adapter plate 26, the second cylinder 27 and the second end cover 24 are detachably connected and hermetically connected, so that the electric pump is simple to detach and convenient to maintain.

Specifically, the side surface 21 of the electric pump is further provided with a third liquid inlet 28. The third liquid inlet 28 has an open state and a closed state. When the third liquid inlet 28 is in an open state, the external liquid source is communicated with the second oil tank 17 through the third liquid inlet 28, so that the oiling can be more convenient. The third liquid inlet 28 can be sealed and waterproof in the closed state.

In a preferred embodiment, the second oil tank 17 and the adapter plate 26 are connected through a hoop, so that the mounting and dismounting are simple, the oil path area is larger, and the hidden danger of oil leakage is reduced. The second oil tank 17 may be an oil bladder. In the present embodiment, the volume of the second oil tank 17 is larger than the volume of the first oil tank, and the first oil tank is always in a full state to supply oil to the first pump 1 and the second pump 2. After the oil in the first oil tank is pumped away by the first pump body 1 and/or the second pump body 2, the oil in the second oil tank 17 can immediately enter the first oil tank, so that the first oil tank is always in a full state.

In the present embodiment, a plurality of compound pump bodies 18 may be provided, and the plurality of compound pump bodies 18 may be uniformly distributed along the circumferential direction of the output shaft 15, thereby further improving the efficiency of the electric pump. Specifically, the first rod 6 and the second rod 7 of each compound pump body 18 extend in a direction perpendicular to the axial direction of the output shaft 15.

The electric pump provided by the embodiment of the application can be amphibious, is small in size, can be amphibious, and is light in size, for example, the diameter of the first end 19 and the second end 20 of the electric pump can be 130mm, and the length from the first end 19 to the second end 20 of the electric pump can be 440 mm.

It should be noted that, in the description of the present specification, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no order is present therebetween, and no indication or suggestion of relative importance is to be made. Further, in the description of the present specification, "a plurality" means two or more unless otherwise specified.

The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.