Pump body system and urea pump equipment

Abstract

The utility model provides a pump body system and urea pump equipment. The pump body system comprises a main pump component, a filter element component, a water tank, a first control valve and a second control valve, the first control valve has a first state for communicating the filter element component with the nozzle component and a second state for communicating the filter element component with the water tank, and at least part of the first control valve is movably arranged to be switched between the first state and the second state; the second control valve has a third state for communicating the main pump component with a storage box used for containing a transportation medium and a fourth state for communicating the main pump component with the water tank, and at least part of the second control valve is movably arranged to be switched between the third state and the fourth state; when the first control valve is switched to the second state and the second control valve is switched to the fourth state, liquid in the water tank sequentially flows through the first control valve, the filter element component and the main pump component and then returns to the water tank, and the problem that in the prior art, the maintenance cost of a urea pump is high is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of post-processing, and in particular to a pump system and urea pump equipment. Background Art

[0002] The urea pump is an important component of the urea solution injection metering system. Its main function is to extract the urea solution inside the urea tank, filter it through the built-in filter element of the urea pump, and then output it to the urea nozzle for injection.

[0003] However, after using for a period of time, the excessive impurities attached to the built-in filter element of the urea pump need to be cleaned regularly, and special tools are needed to remove the built-in filter element from the urea pump for cleaning, which makes the cleaning of the built-in filter element of the urea pump more complicated, time-consuming and labor-intensive, and makes the maintenance cost of the urea pump higher. Utility Model Content

[0004] The main purpose of the utility model is to provide a pump system and a urea pump device to solve the problem of high maintenance cost of the urea pump in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a pump body system is provided, including a main pump component and a filter element component, and the pump body system also includes: a water tank; a first control valve, the first control valve has a first state connecting the filter element component with the nozzle component and a second state connecting the filter element component with the water tank, and at least a part of the first control valve is movably arranged to switch between the first state and the second state; a second control valve, the second control valve has a third state connecting the main pump component with a storage tank for accommodating a transport medium and a fourth state connecting the main pump component with the water tank, and at least a part of the second control valve is movably arranged to switch between the third state and the fourth state; wherein, when the first control valve is switched to the second state, and the second control valve is switched to the fourth state, the liquid in the water tank flows through the first control valve, the filter element component and the main pump component in sequence and then returns to the water tank.

[0006] Further, the first control valve includes a first connecting end and a first movable end which are interconnected, the first connecting end is connected to the filter element component, and the free end of the first movable end is rotatably arranged to be connected to the nozzle component or the water tank; when the free end of the first movable end is rotated to be connected to the nozzle component, the first control valve switches to the first state; when the free end of the first movable end is rotated to be connected to the water tank, the first control valve switches to the second state.

[0007] Further, the second control valve includes a second connecting end and a second movable end which are interconnected, the second connecting end is connected to the main pump component, and the free end of the second movable end is rotatably arranged to be connected to a storage box or a water tank; when the free end of the second movable end is rotated to be connected to the storage box, the second control valve switches to a third state; when the free end of the second movable end is rotated to be connected to the water tank, the second control valve switches to a fourth state.

[0008] Furthermore, the pump body system also includes: a first connecting pipe, the first end of the first connecting pipe is connected to the second connecting end of the second control valve, the second end of the first connecting pipe is connected to the first connecting end of the first control valve, and the main pump component and the filter element component are arranged on the first connecting pipe and between the first control valve and the second control valve.

[0009] Furthermore, the pump system also includes: a second connecting pipe, a first end of which is connected to the inlet of the water tank; when the second control valve is switched to the fourth state, the second end of the second connecting pipe is connected to the second active end of the second control valve.

[0010] Furthermore, the pump system further comprises: a filter component, which is arranged on the second connecting pipe to filter the liquid flowing out of the filter element component.

[0011] Furthermore, the pump system also includes: a third connecting pipe, a first end of the third connecting pipe is used to be connected to the outflow outlet of the water tank, and when the first control valve is switched to the second state, the second end of the third connecting pipe is connected to the first active end of the first control valve.

[0012] Furthermore, the pump system also includes: a fourth connecting pipe, a first end of which is used to communicate with the nozzle component, and when the first control valve is switched to the first state, the second end of the fourth connecting pipe is connected to the first movable end of the first control valve.

[0013] Furthermore, the pump system also includes: a fifth connecting pipe, a first end of which is used to communicate with the storage box, and when the second control valve is switched to the third state, the second end of the fifth connecting pipe is connected to the second active end of the second control valve.

[0014] According to another aspect of the utility model, a urea pump device is provided, including a storage tank for containing urea and a nozzle component. The urea pump device also includes the above-mentioned pump body system, the first control valve of the pump body system is connected to the nozzle component, and the second control valve of the pump body system is connected to the storage tank.

[0015] By applying the technical solution of the utility model, the pump system includes a main pump component, a filter element component, a water tank, a first control valve and a second control valve. When the filter element component is working, the first control valve is switched to the first state, and the second control valve is switched to the third state. At this time, the main pump component extracts the transport medium from the storage tank, so that the transport medium flows through the second control valve, the main pump component, the filter element component and the first control valve in sequence to enter the nozzle component for injection; when the filter element component needs to be cleaned, the first control valve is switched to the second state, and the second control valve is switched to the fourth state. At this time, the main pump component pumps water from the water tank, so that the water flows through the first control valve into the filter element component to clean the filter element component, and then the water flows through the main pump component and the second control valve in sequence back to the water tank, and the filter element component is cleaned by reversely extracting water from the water tank through the main pump component, so that the user is prevented from removing the filter element component from the urea pump for cleaning, which simplifies the cleaning work of the filter element component and reduces the maintenance cost of the urea pump, thereby solving the problem of high maintenance cost of the urea pump in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic diagram showing an embodiment of a pump system according to the utility model (the first control valve is in the second state, and the second control valve is in the fourth state); and

[0018] Figure 2 A schematic diagram of an embodiment of a pump system according to the utility model (the first control valve is in the first state, and the second control valve is in the third state) is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Main pump component; 20. Filter element component; 30. Water tank; 40. First control valve; 7. Nozzle component; 50. Second control valve; 8. Storage box; 41. First connecting end; 42. First movable end; 51. Second connecting end; 52. Second movable end; 60. First connecting pipe; 80. Second connecting pipe; 90. Filter component; 31. Inlet; 100. Third connecting pipe; 32. Outlet; 110. Fourth connecting pipe; 120. Fifth connecting pipe. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0024] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0025] This utility model provides a pump system, please refer to Figure 1 and Figure 2, including a main pump component 10 and a filter element component 20, the pump body system also includes: a water tank 30; a first control valve 40, the first control valve 40 has a first state of connecting the filter element component 20 with the nozzle component 7 and a second state of connecting the filter element component 20 with the water tank 30, at least a portion of the first control valve 40 is movably arranged to switch between the first state and the second state; a second control valve 50, the second control valve 50 has a third state of connecting the main pump component 10 with a storage box 8 for accommodating a transport medium and a fourth state of connecting the main pump component 10 with the water tank 30, at least a portion of the second control valve 50 is movably arranged to switch between the third state and the fourth state; wherein, when the first control valve 40 is switched to the second state, and the second control valve 50 is switched to the fourth state, the liquid in the water tank 30 flows through the first control valve 40, the filter element component 20 and the main pump component 10 in sequence and then returns to the water tank 30.

[0026] The pump system of the utility model comprises a main pump component 10, a filter component 20, a water tank 30, a first control valve 40 and a second control valve 50. When the filter component 20 is working, the first control valve 40 is switched to the first state, and the second control valve 50 is switched to the third state. At this time, the main pump component 10 extracts the transport medium from the storage box 8, so that the transport medium flows through the second control valve 50, the main pump component 10, the filter component 20 and the first control valve 40 in sequence and enters the nozzle component 7 for injection; when the filter component 20 needs to be cleaned, the first control valve 40 is switched to the second state, and the second control valve 50 is switched to the third state. 0 switches to the fourth state, at this time, the main pump component 10 pumps water from the water tank 30, so that the water flows through the first control valve 40 into the filter element component 20 to clean the filter element component 20, and then the water flows through the main pump component 10 and the second control valve 50 in sequence back to the water tank 30, and the main pump component 10 reversely pumps water in the water tank 30 to clean the filter element component 20, thereby avoiding the user from removing the filter element component 20 from the urea pump for cleaning, simplifying the cleaning work of the filter element component 20, reducing the maintenance cost of the urea pump, and thus solving the problem of high maintenance cost of the urea pump in the prior art.

[0027] Specifically, the urea pump includes a main pump component 10 and a filter element component 20 which are connected in sequence; the storage box 8 is a urea tank; after each driving cycle of the vehicle, the urea pump will perform back suction to draw the urea in the nozzle component 7 back to the urea tank to prevent the urea from crystallizing in the nozzle component 7 and expanding in volume after freezing at low temperature, thereby damaging the nozzle component 7.

[0028] The utility model is connected to the water tank 30 through the first control valve 40 and the second control valve 50 outside the urea pump. After the urea pump sucks urea back into the urea tank, the first control valve 40 is rotated to close the passage from the nozzle component 7 to the urea pump, and the passage from the water tank 30 to the urea pump is opened. Clean water is sucked into the urea pump by back suction, and the filter element component 20 is reversely cleaned. After the clean water passes through the urea pump, the second control valve 50 is opened to close the passage from the urea pump to the urea tank, and open the passage from the urea pump to the water tank 30, so that all the clean water in the urea pump is discharged back to the water tank 30.

[0029] In this embodiment, if Figure 1 and Figure 2 As shown, the first control valve 40 includes a first connecting end 41 and a first movable end 42 that are interconnected. The first connecting end 41 is connected to the filter element 20, and the free end of the first movable end 42 is rotatably arranged to be connected to the nozzle element 7 or the water tank 30. When the free end of the first movable end 42 is rotated to be connected to the nozzle element 7, the first control valve 40 is switched to the first state; when the free end of the first movable end 42 is rotated to be connected to the water tank 30, the first control valve 40 is switched to the second state. By rotating the free end of the first movable end 42 to be connected to the nozzle element 7 and the water tank 30, the first control valve 40 can be switched from the first state to the second state when the filter element 20 needs to be cleaned, and the water in the water tank 30 flows into the filter element 20 through the first control valve 40 to flush it.

[0030] In another embodiment, not shown in the figure, the first control valve 40 is a three-way valve, and the three communication ports of the three-way valve are respectively connected to the water tank 30, the nozzle component 7 and the filter element component 20, and the valve core inside the three-way valve is rotatably arranged to close the corresponding communication port of the water tank 30, so that the nozzle component 7 and the filter element component 20 are connected, and the first control valve 40 is switched to the first state; or close the corresponding communication port of the nozzle component 7, so that the water tank 30 and the filter element component 20 are connected, and the first control valve 40 is switched to the second state. The second control valve 50 is a three-way valve, and its principle is the same as that of the first control valve 40, which will not be described here.

[0031] In this embodiment, if Figure 1 and Figure 2As shown, the second control valve 50 includes a second connection end 51 and a second movable end 52 which are connected to each other, the second connection end 51 is connected to the main pump component 10, and the free end of the second movable end 52 is rotatably arranged to be connected to the storage box 8 or the water tank 30; when the free end of the second movable end 52 is rotated to be connected to the storage box 8, the second control valve 50 is switched to the third state; when the free end of the second movable end 52 is rotated to be connected to the water tank 30, the second control valve 50 is switched to the fourth state. By rotating the free end of the second movable end 52 to be connected to the storage box 8 and the water tank 30 respectively, the second control valve 50 can be switched from the third state to the fourth state when the filter element component 20 needs to be cleaned, so that the water for washing the filter element component 20 can flow through the main pump component 10 and the second control valve 50 in sequence back to the water tank 30, so as to avoid water being retained in the main pump component 10 and the filter element component 20.

[0032] In this embodiment, if Figure 1 and Figure 2 As shown, the pump system further includes: a first connecting pipe 60, a first end of the first connecting pipe 60 is connected to the second connecting end 51 of the second control valve 50, a second end of the first connecting pipe 60 is connected to the first connecting end 41 of the first control valve 40, and the main pump component 10 and the filter element component 20 are arranged on the first connecting pipe 60 and arranged between the first control valve 40 and the second control valve 50. The first control valve 40, the second control valve 50, the main pump component 10 and the filter element component 20 are connected through the first connecting pipe 60 to ensure that when the first control valve 40 is switched to the second state and the second control valve 50 is switched to the fourth state, the water in the water tank 30 flows through the first control valve 40, the first end of the first connecting pipe 60, the filter element component 20, the main pump component 10, the second end of the first connecting pipe 60 and the second control valve 50 in sequence and then flows back to the water tank 30, and the cleaning of the filter element component 20 is successfully completed.

[0033] In this embodiment, if Figure 1 and Figure 2 As shown, the pump system further includes: a second connecting pipe 80, the first end of which is connected to the inlet 31 of the water tank 30; when the second control valve 50 is switched to the fourth state, the second end of the second connecting pipe 80 is connected to the second movable end 52 of the second control valve 50. The water tank 30 and the second control valve 50 are connected through the second connecting pipe 80 to ensure that the water for flushing the filter core component 20 flows through the main pump component 10, the second end of the second connecting pipe 80, the second connecting end 51 and the second movable end 52 in sequence and then returns to the water tank 30 through the inlet 31, so as to avoid water being retained in the filter core component 20 and the main pump component 10, and at the same time complete the recycling of water, so as to realize the reuse of water in the water tank 30.

[0034] In this embodiment, if Figure 1 and Figure 2As shown, the pump system further includes: a filter component 90, which is arranged on the second connecting pipe 80 to filter the liquid flowing out of the filter element component 20. The sewage flowing through the filter element component 20, the main pump component 10 and the second control valve 50 in sequence is filtered by the filter component 90 and then returned to the water tank 30, so as to realize the reuse of the water in the water tank 30; wherein, the filter component 90 can be designed as a large filter element that can accommodate impurities within the life cycle, so as to enhance the filtering effect of the filter component 90.

[0035] In this embodiment, if Figure 1 and Figure 2 As shown, the pump system further includes: a third connecting pipe 100, a first end of the third connecting pipe 100 is used to communicate with the outflow port 32 of the water tank 30, and when the first control valve 40 is switched to the second state, the second end of the third connecting pipe 100 is connected to the first movable end 42 of the first control valve 40. The water tank 30 and the first control valve 40 are connected by the third connecting pipe 100 to ensure that when the first control valve 40 is switched to the second state, the water in the water tank 30 flows through the outflow port 32, the first movable end 42, the first connecting end 41 and the first end of the first connecting pipe 60 in sequence and flows into the filter element component 20 to clean the filter element component 20.

[0036] In this embodiment, if Figure 1 and Figure 2 As shown, the pump body system also includes: a fourth connecting pipe 110, a first end of the fourth connecting pipe 110 is used to be connected to the nozzle component 7, and when the first control valve 40 is switched to the first state, the second end of the fourth connecting pipe 110 is connected to the first active end 42 of the first control valve 40.

[0037] In this embodiment, if Figure 1 and Figure 2 As shown, the pump body system also includes: a fifth connecting pipe 120, the first end of the fifth connecting pipe 120 is used to be connected to the storage box 8, and when the second control valve 50 is switched to the third state, the second end of the fifth connecting pipe 120 is connected to the second active end 52 of the second control valve 50.

[0038] Specifically, the nozzle component 7 and the first control valve 40 are connected by the fourth connecting pipe 110, and the second control valve 50 and the storage box 8 are connected by the fifth connecting pipe 120, so as to ensure that when the first control valve 40 is switched to the first state and the second control valve 50 is switched to the third state, the transport medium in the storage box 8, i.e., urea, flows through the fifth connecting pipe 120, the second active end 52, the second connecting end 51, the main pump component 10, the filter element component 20, the first connecting end 41, the first active end 42 and the fourth connecting pipe 110 in sequence to enter the nozzle component 7, thereby successfully completing the injection of urea.

[0039] The utility model also provides a urea pump device, including a storage box 8 and a nozzle component 7 for accommodating urea. The urea pump device also includes the pump body system in the above embodiment, the first control valve 40 of the pump body system is connected to the nozzle component 7, and the second control valve 50 of the pump body system is connected to the storage box 8.

[0040] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0041] The pump system of the utility model comprises a main pump component 10, a filter component 20, a water tank 30, a first control valve 40 and a second control valve 50. When the filter component 20 is working, the first control valve 40 is switched to the first state, and the second control valve 50 is switched to the third state. At this time, the main pump component 10 extracts the transport medium from the storage box 8, so that the transport medium flows through the second control valve 50, the main pump component 10, the filter component 20 and the first control valve 40 in sequence and enters the nozzle component 7 for injection; when the filter component 20 needs to be cleaned, the first control valve 40 is switched to the second state, and the second control valve 50 is switched to the third state. 50 switches to the fourth state, at this time, the main pump component 10 pumps water from the water tank 30, so that the water flows through the first control valve 40 into the filter element component 20 to clean the filter element component 20, and then the water flows through the main pump component 10 and the second control valve 50 in sequence back to the water tank 30, and the main pump component 10 reversely pumps water from the water tank 30 to clean the filter element component 20, thereby avoiding the user from removing the filter element component 20 from the urea pump for cleaning, simplifying the cleaning work of the filter element component 20, and reducing the maintenance cost of the urea pump, thereby solving the problem of high maintenance cost of the urea pump in the prior art.

[0042] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0043] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0044] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pump system, comprising a main pump component (10) and a filter element component (20), characterized in that: The pump system also includes: Water tank (30); a first control valve (40), the first control valve (40) having a first state for connecting the filter element component (20) with the nozzle component (7) and a second state for connecting the filter element component (20) with the water tank (30), at least a portion of the first control valve (40) being movably arranged to switch between the first state and the second state; a second control valve (50), the second control valve (50) having a third state for connecting the main pump component (10) with a storage tank (8) for containing a transport medium and a fourth state for connecting the main pump component (10) with the water tank (30), at least a portion of the second control valve (50) being movably arranged to switch between the third state and the fourth state; When the first control valve (40) is switched to the second state and the second control valve (50) is switched to the fourth state, the liquid in the water tank (30) flows through the first control valve (40), the filter element component (20) and the main pump component (10) in sequence and then returns to the water tank (30).

2. The pump system according to claim 1, characterized in that: The first control valve (40) comprises a first connecting end (41) and a first movable end (42) which are connected to each other, the first connecting end (41) being connected to the filter element component (20), and the free end of the first movable end (42) being rotatably arranged to be connected to the nozzle component (7) or the water tank (30); when the free end of the first movable end (42) is rotated to be connected to the nozzle component (7), the first control valve (40) is switched to the first state; when the free end of the first movable end (42) is rotated to be connected to the water tank (30), the first control valve (40) is switched to the second state.

3. The pump system according to claim 1, characterized in that: The second control valve (50) comprises a second connecting end (51) and a second movable end (52) which are connected to each other, wherein the second connecting end (51) is connected to the main pump component (10), and the free end of the second movable end (52) is rotatably arranged to be connected to the storage box (8) or the water tank (30); when the free end of the second movable end (52) is rotated to be connected to the storage box (8), the second control valve (50) is switched to the third state; when the free end of the second movable end (52) is rotated to be connected to the water tank (30), the second control valve (50) is switched to the fourth state.

4. The pump system according to claim 1, characterized in that: The pump system also includes: A first connecting pipe (60), wherein a first end of the first connecting pipe (60) is connected to a second connecting end (51) of the second control valve (50), and a second end of the first connecting pipe (60) is connected to a first connecting end (41) of the first control valve (40), and the main pump component (10) and the filter element component (20) are arranged on the first connecting pipe (60) and between the first control valve (40) and the second control valve (50).

5. The pump system according to claim 1, characterized in that: The pump system also includes: A second connecting pipe (80), wherein the first end of the second connecting pipe (80) is connected to the inlet (31) of the water tank (30); when the second control valve (50) is switched to the fourth state, the second end of the second connecting pipe (80) is connected to the second movable end (52) of the second control valve (50).

6. The pump system according to claim 5, characterized in that: The pump system also includes: A filter component (90) is arranged on the second connecting pipe (80) to filter the liquid flowing out of the filter element component (20).

7. The pump system according to claim 1, characterized in that: The pump system also includes: A third connecting pipe (100), wherein the first end of the third connecting pipe (100) is used to be connected to the outflow port (32) of the water tank (30), and when the first control valve (40) is switched to the second state, the second end of the third connecting pipe (100) is connected to the first movable end (42) of the first control valve (40).

8. The pump system according to claim 1, characterized in that: The pump system also includes: A fourth connecting pipe (110), wherein the first end of the fourth connecting pipe (110) is used to be connected to the nozzle component (7), and when the first control valve (40) is switched to the first state, the second end of the fourth connecting pipe (110) is connected to the first movable end (42) of the first control valve (40).

9. The pump system according to claim 1, characterized in that: The pump system also includes: A fifth connecting pipe (120), wherein the first end of the fifth connecting pipe (120) is used to be connected to the storage box (8), and when the second control valve (50) is switched to the third state, the second end of the fifth connecting pipe (120) is connected to the second active end (52) of the second control valve (50).

10. A urea pump device, comprising a storage tank (8) for containing urea and a nozzle component (7), characterized in that: The urea pump device further comprises a pump system according to any one of claims 1 to 9, wherein a first control valve (40) of the pump system is connected to the nozzle component (7), and a second control valve (50) of the pump system is connected to the storage tank (8).

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