Substrate water content detection device with adjusting and compensating functions for soilless culture

Abstract

The invention discloses a substrate water content detection device with an adjusting and compensating function for soilless culture, and relates to the technical field of detection.The substrate water content detection device comprises a detection body, water conveying openings are formed in the two ends of the detection body, a mixing cavity is formed in the detection body, and the water conveying openings communicate with the mixing cavity; a plurality of detection rods are arranged on the outer wall of the detection body, and moisture sensors are arranged in the detection rods; the detection body is placed in a soilless culture pot, then matrix water in the soilless culture pot is input through the water conveying openings in the two ends to form two water flows, the water flows are conveyed into the mixing cavity through the water conveying openings in the two ends, and when the two water flows meet in the mixing cavity, the two water flows collide with each other, so that the two water flows collide and are mixed in the mixing cavity; and the substrate water which is impacted and mixed is conveyed in the soilless culture pot through the mixing cavity, so that the substrate and the water are prevented from being layered, the deviation of water content detection is avoided, and the accuracy of substrate water content detection is further improved.

Description

Technical Field

[0001] The invention relates to the field of detection technology, in particular to a substrate moisture content detection device with adjustment and compensation functions for soilless cultivation. Background Art

[0002] Soilless cultivation is a new crop cultivation technology developed in recent decades. Crops are not cultivated in the soil, but in a water solution (nutrient solution) containing dissolved minerals; or in a certain cultivation matrix, using nutrient solution to cultivate crops. As long as there are certain cultivation equipment and certain management measures, crops can grow normally and obtain high yields. Since crops are cultivated with nutrient solution instead of natural soil, it is called soilless cultivation. However, the success of soilless cultivation depends largely on the moisture content of the substrate; too low a water content in the substrate may cause drought in the plant and insufficient nutrient absorption, while too high a water content will affect the air permeability of the root system, thereby inhibiting the normal respiration and nutrient absorption of the plant root system, and even causing root rot. Therefore, accurately controlling the moisture content of the substrate is one of the key factors to ensure the healthy growth of plants; Due to long-term static standing in the existing soilless cultivation pots, the substrate and water will be stratified, which will cause certain data differences in the process of testing the moisture content of the substrate water, resulting in inaccurate detection of the substrate moisture content. Summary of the invention

[0003] The purpose of the present invention is to provide a substrate moisture content detection device with adjustment and compensation functions for soilless cultivation, so as to solve the problems raised in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions: A substrate moisture content detection device with adjustment and compensation functions for soilless cultivation comprises a detection body, water inlets are arranged at both ends of the detection body, a mixing chamber is arranged inside the detection body, the water inlet is communicated with the mixing chamber, a plurality of detection rods are arranged on the outer wall of the detection body, and moisture sensors are arranged inside the detection rods.

[0005] The detection body is placed in a soilless cultivation pot, and then the matrix water in the soilless cultivation pot is input from the water inlets at both ends, thereby forming two water flows, and the water flows are transported to the mixing chamber from the water inlets at both ends. When the two water flows meet in the mixing chamber, a collision will occur, so that the two water flows collide and mix in the mixing chamber, and the matrix water after collision and mixing is transported to the soilless cultivation pot through the mixing chamber, so as to achieve the mixing of water and matrix in the soilless cultivation pot, avoiding the formation of stratification between the matrix and water, which leads to deviation in water content detection, thereby improving the accuracy of matrix water content detection, and by arranging a plurality of detection rods on the outer wall of the detection body, the detection rods form a matrix outside the detection body, so as to detect the matrix water at various positions outside the detection body, further improving the accuracy of matrix water content detection.

[0006] Preferably, a plurality of water delivery grooves are provided on the side of the water delivery port away from the detection body, and the plurality of water delivery grooves are arranged around the axis of the water delivery port. A rotating ring is also provided on the water delivery port, and a plurality of fan blades are provided on the side of the rotating ring close to the water delivery groove, and the plurality of fan blades are arranged around the axis of the rotating ring.

[0007] Preferably, a magnetic conductor is provided in the rotating ring, an electromagnetic coil is provided in the inner wall of the water inlet, the fan blades are arc-shaped, and an angle exists between the axis of the fan blades and the axis of the rotating ring.

[0008] Preferably, the upper and lower end faces of the mixing chamber are provided with helical surfaces, the helical patterns of the helical surfaces spread from the center to the surroundings, a plurality of guide grooves are provided between the two helical surfaces, and the arrangement direction of the guide grooves is the same as the arrangement direction of the helical patterns on the helical surfaces.

[0009] Preferably, a rotating body is provided on the outer wall of the detection body, and the rotating body is rotatably connected to the detection body. A conveying ring groove is provided on the side of the rotating body close to the mixing chamber, and the conveying ring groove is connected to the mixing chamber. A plurality of rotating blades are provided in the conveying ring groove, and the plurality of rotating blades are arranged around the axis of the conveying ring groove.

[0010] Preferably, the arrangement direction of the rotating blades is opposite to the arrangement direction of the spiral patterns on the spiral surface.

[0011] Preferably, a plurality of conveying pipes are provided in the rotating body, and the plurality of conveying pipes are arranged around the axis of the rotating body, one end of the conveying pipe is connected to the conveying ring groove, and the other end of the conveying pipe is connected to the outside.

[0012] Preferably, the detection rod is directly connected to the detection body via a bracket, and the detection rod is rotatably connected to the bracket.

[0013] Preferably, the cross-section of the water inlet and the cross-section of the combination of the plurality of blades and the rotating ring are both trumpet-shaped.

[0014] Preferably, a connecting tube is provided between two adjacent detection rods, the connecting tube is connected to the conveying ring groove, a water cavity and a matrix cavity are provided outside the detection body, a water pump is provided in the water cavity and the matrix cavity, and the water pump is connected to the connecting tube through a pipeline.

[0015] When the detection body is placed in the soilless cultivation pot, the controller then controls the electromagnetic coils in the two water inlets to start. Since a magnetic conductor is provided in the rotating ring, the rotating ring is affected by the magnetic force of the electromagnetic coil, thereby generating rotation. During the rotation of the rotating ring, a plurality of fan blades are driven to rotate, and then the combination of the two fan blades and the rotating ring is stirred in the soilless cultivation pot, thereby driving the substrate water in the soilless cultivation pot to move, so that the substrate water flows to the side close to the water inlet. When the substrate water flows to the water inlet, it first encounters the water trough, and then flows to the water inlet through the plurality of water troughs; Since the cross-section of the water delivery port and the cross-section of the combination of the plurality of blades and the rotating ring are both trumpet-shaped, after the matrix water enters the water delivery port, the cross-sectional diameter is reduced, thereby increasing the flow rate of the matrix water, and the two water delivery ports are on the same axis, and the two water flows move toward the side close to the mixing chamber. When the two water flows flow into the mixing chamber, the two water flows collide in the mixing chamber, thereby achieving the effect of collision mixing, so that the matrix water in the upper layer is mixed with the matrix water in the lower layer, and the matrix water is prevented from stratifying when it is left standing for a long time; After the two streams of water collide and mix in the mixing chamber, they will flow from the center of the mixing chamber to the surroundings of the mixing chamber. Since the upper and lower end surfaces of the mixing chamber are provided with spiral surfaces, and the spiral patterns of the spiral surfaces spread from the center to the surroundings, the water flows in the form of spiral flow to the side away from the axis of the mixing chamber. Since a number of guide grooves are provided between the two spiral surfaces, the water flows along the guide grooves and then flows to the side close to the rotating body. When the water flows to the end of the guide groove away from the mixing chamber, the water will encounter the rotating blades. Since the arrangement direction of the rotating blades is opposite to the arrangement direction of the spiral pattern on the spiral surface, the rotating blades will be impacted by the water flow, and then the rotating blades will rotate. When the rotating blades rotate, the rotating body will be driven to rotate, and then the rotating body will drive several conveying pipes to rotate, and the water will be transported from the guide groove to the conveying ring groove, and finally flow to the conveying pipe through the conveying ring groove, and finally transported to the soilless cultivation pot through the conveying pipe. The sprayed water will be sprayed into the soilless cultivation pot in the form of a spiral, thereby promoting the movement of the substrate water in the soilless cultivation pot; When the mixed water flow is ejected from the detection body, the mixed water flow will encounter the detection rod, and the moisture sensor in the detection rod will detect the ejected mixed water flow, convert the water content signal in the mixed water flow into an electrical signal, and transmit it to the controller. The controller compares whether the signal is within the set range. If the water content is greater than the set range, the controller controls the water pump in the matrix cavity to start, and the water pump in the matrix cavity extracts the matrix and transports it to the connecting pipe through the pipeline, and then transports it to the conveying ring groove through the connecting pipe, and then the mixed water flow mixes with the newly added matrix in the conveying ring groove; if the water content is less than the set range, the controller controls the water pump in the water cavity to start, and the water pump in the water cavity extracts water and transports it to the connecting pipe through the pipeline, and then transports it to the conveying ring groove through the connecting pipe, and then the mixed water flow mixes with the newly added water in the conveying ring groove; thereby achieving the effect of adjustment and compensation, ensuring that the water content of the matrix water in the soilless cultivation pot is always within the set range, thereby ensuring the normal growth of the plant; And because the rotating ring and the fan blades rotate in the soilless cultivation pot, and the detection rod is directly connected to the detection body through the bracket, the detection rod is rotatably connected to the bracket, so that the mixed water flow sprayed by the detection body will impact the detection rod and then drive the detection rod to rotate, and then the combination of several detection rods, two rotating rings and several fan blades stirs the substrate water in the soilless cultivation pot, thereby also driving the air to mix with the substrate water, thereby achieving the effect of oxygenating the substrate water, better promoting the growth of plants, and while detecting the water content of the substrate water, completing the mixing and stirring of the substrate water, and completing the oxygenation effect of the substrate water, reducing the number of required equipment, improving the utilization rate of resources, and further promoting the growth of plants.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. After the matrix water enters the water delivery port, the flow rate of the matrix water increases due to the reduction of the cross-sectional diameter, and the two water delivery ports are on the same axis, and the two water flows move to the side close to the mixing chamber. When the two water flows flow to the mixing chamber, the two water flows will collide in the mixing chamber, thereby achieving the effect of collision mixing, so that the matrix water in the upper layer is mixed with the matrix water in the lower layer, avoiding the stratification phenomenon of the matrix water under long-term static state; after the two water flows collide and mix in the mixing chamber, they will flow from the center of the mixing chamber to the surroundings of the mixing chamber. Since the upper and lower end faces of the mixing chamber are provided with spiral surfaces, and the spiral patterns of the spiral surfaces spread from the center to the surroundings, the water flows in the form of spiral flow to the side away from the axis of the mixing chamber. Since a number of guide grooves are provided between the two spiral surfaces, the water flows along the guide grooves, and then the water flows to the side close to the rotating body.

[0017] 2. Since the rotating ring and the fan blades rotate in the soilless cultivation pot, and the detection rod is directly connected to the detection body through the bracket, the detection rod is rotatably connected to the bracket, so that the mixed water flow sprayed by the detection body will impact the detection rod and then drive the detection rod to rotate, and then the combination of several detection rods, two rotating rings and several fan blades stirs the matrix water in the soilless cultivation pot, which will also drive the air to mix with the matrix water, thereby achieving the effect of oxygenating the matrix water and better promoting the growth of plants. While detecting the water content of the matrix water, the mixing and stirring of the matrix water is completed, and the oxygenation effect of the matrix water is also completed, reducing the number of required equipment, improving the utilization rate of resources, and further promoting the growth of plants.

[0018] 3. By arranging a plurality of detection rods on the outer wall of the detection body, the detection rods form a matrix outside the detection body, thereby detecting the matrix water at various positions outside the detection body, further improving the accuracy of the detection of the matrix water content. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A perspective view of the present invention; Figure 2 It is a front view of the present invention; Figure 3 A top view of the present invention; Figure 4 It is a schematic diagram of the internal structure of the present invention; Figure 5 It is a structural schematic diagram of the connecting pipe and the conveying ring groove; Figure 6 It is a cross-sectional structural schematic diagram of the present invention; Figure 7 It is a cross-sectional top view of the present invention; Figure 8 It is a schematic diagram of the structure of the rotating ring and the fan blades; In the figure: 1, detection body; 11, water delivery port; 12, detection rod; 13, water delivery trough; 14, rotating ring; 15, fan blade; 16, rotating body; 17, delivery ring groove; 18, rotating blade; 19, delivery pipe; 20, connecting pipe; 2. Mixing chamber; 21. Helical surface; 22. Guide groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example: Figure 1-Figure 8 As shown, the present invention provides a technical solution of a substrate moisture content detection device with adjustment and compensation functions for soilless cultivation, including a detection body 1, water inlets 11 are arranged at both ends of the detection body 1, a mixing chamber 2 is arranged inside the detection body 1, the water inlet 11 is connected to the mixing chamber 2, a plurality of detection rods 12 are arranged on the outer wall of the detection body 1, and a moisture sensor is arranged inside the detection rods 12.

[0022] As a specific implementation of the present invention, the detection rod 12 is directly connected to the detection body 1 through a bracket, and the detection rod 12 is rotatably connected to the bracket.

[0023] As a specific embodiment of the present invention, a plurality of water delivery grooves 13 are provided on the side of the water delivery port 11 away from the detection body 1, and the plurality of water delivery grooves 13 are arranged around the axis of the water delivery port 11. A rotating ring 14 is also provided on the water delivery port 11, and a plurality of fan blades 15 are provided on the side of the rotating ring 14 close to the water delivery groove 13, and the plurality of fan blades 15 are arranged around the axis of the rotating ring 14.

[0024] As a specific embodiment of the present invention, a magnetic conductor is arranged in the rotating ring 14 , an electromagnetic coil is arranged in the inner wall of the water inlet 11 , the fan blade 15 is arc-shaped, and the axis of the fan blade 15 forms an angle with the axis of the rotating ring 14 .

[0025] As a specific implementation of the present invention, the cross-section of the water inlet 11 and the cross-section of the combination of the plurality of blades 15 and the rotating ring 14 are both trumpet-shaped.

[0026] As a specific embodiment of the present invention, the upper and lower end faces of the mixing chamber 2 are provided with a spiral surface 21, and the spiral pattern of the spiral surface 21 spreads from the center to the surroundings. A plurality of guide grooves 22 are provided between the two spiral surfaces 21, and the arrangement direction of the guide grooves 22 is the same as the arrangement direction of the spiral pattern on the spiral surface 21.

[0027] As a specific embodiment of the present invention, a rotating body 16 is arranged on the outer wall of the detection body 1, and the rotating body 16 is rotatably connected to the detection body 1. A conveying ring groove 17 is arranged on the side of the rotating body 16 close to the mixing chamber 2, and the conveying ring groove 17 is connected to the mixing chamber 2. A plurality of rotating blades 18 are arranged in the conveying ring groove 17, and the plurality of rotating blades 18 are arranged around the axis of the conveying ring groove 17.

[0028] As a specific implementation of the present invention, the arrangement direction of the rotating blades 18 is opposite to the arrangement direction of the spiral patterns on the spiral surface 21 .

[0029] As a specific embodiment of the present invention, a plurality of delivery pipes 19 are provided in the rotating body 16, and the plurality of delivery pipes 19 are arranged around the axis of the rotating body 16, one end of the delivery pipe 19 is connected to the delivery annular groove 17, and the other end of the delivery pipe 19 is connected to the outside.

[0030] As a specific embodiment of the present invention, a connecting tube 20 is provided between two adjacent detection rods 12, and the connecting tube 20 is connected to the conveying ring groove 17. A water cavity and a matrix cavity are provided on the outside of the detection body 1, and water pumps are provided in the water cavity and the matrix cavity, and the water pump is connected to the connecting tube 20 through a pipeline.

[0031] Working principle of the present invention: When the detection body 1 is placed in the soilless cultivation pot, the controller then controls the electromagnetic coils in the two water inlets 11 to start. Since a magnetic conductor is provided in the rotating ring 14, the rotating ring 14 is affected by the magnetic force of the electromagnetic coil, thereby generating rotation. During the rotation of the rotating ring 14, the plurality of blades 15 are driven to rotate, and then the combination of the two blades 15 and the rotating ring 14 is stirred in the soilless cultivation pot, thereby driving the substrate water in the soilless cultivation pot to move, so that the substrate water flows to the side close to the water inlet 11. When the substrate water flows to the water inlet 11, it first encounters the water trough 13, and then flows to the water inlet 11 through the plurality of water troughs 13; Since the cross-section of the water delivery port 11 and the cross-section of the combination of the plurality of blades 15 and the rotating ring 14 are both trumpet-shaped, after the matrix water enters the water delivery port 11, the cross-sectional diameter is reduced, thereby increasing the flow rate of the matrix water, and the two water delivery ports 11 are on the same axis, and the two water flows move toward the side close to the mixing chamber 2. When the two water flows flow toward the mixing chamber 2, the two water flows collide in the mixing chamber 2, thereby achieving the effect of collision mixing, so that the matrix water in the upper layer is mixed with the matrix water in the lower layer, and the matrix water is prevented from being stratified when it is left standing for a long time; After the two streams of water collide and mix in the mixing chamber 2, they will flow from the center of the mixing chamber 2 to the periphery of the mixing chamber 2. Since the upper and lower end surfaces of the mixing chamber 2 are provided with spiral surfaces 21, and the spiral pattern of the spiral surface 21 spreads from the center to the periphery, the water flows in the form of a spiral flow toward the side away from the axis of the mixing chamber 2. Since a plurality of guide grooves 22 are provided between the two spiral surfaces 21, the water flows along the guide grooves 22 and then flows toward the side close to the rotating body 16. When the water flows to the end of the guide groove 22 away from the mixing chamber 2, the water will encounter the rotating blade 18. Since the arrangement direction of the rotating blade 18 is opposite to the arrangement direction of the spiral pattern on the spiral surface 21, the rotating blade 18 will be impacted by the water flow, and then the rotating blade 18 will rotate. When the rotating blade 18 rotates, it drives the rotating body 16 to rotate, and then the rotating body 16 drives a plurality of conveying pipes 19 to rotate, and the water will be transported from the guide groove 22 to the conveying ring groove 17, and finally flow to the conveying pipe 19 through the conveying ring groove 17, and finally transported to the soilless cultivation pot through the conveying pipe 19. The sprayed water will be sprayed to the soilless cultivation pot in a spiral form, thereby promoting the movement of the substrate water in the soilless cultivation pot. When the mixed water flow is ejected from the detection body 1, the mixed water flow will encounter the detection rod 12. The moisture sensor in the detection rod 12 will detect the ejected mixed water flow, convert the water content signal in the mixed water flow into an electrical signal, and transmit it to the controller. The controller compares whether the signal is within the set range. If the water content is greater than the set range, the controller controls the water pump in the matrix cavity to start, and the water pump in the matrix cavity extracts the matrix and transports it to the connecting pipe 20 through the pipeline, and transports it to the conveying ring groove 17 through the connecting pipe 20, and then the mixed water flow is mixed with the newly added matrix in the conveying ring groove 17; if the water content is less than the set range, the controller controls the water pump in the water cavity to start, and the water pump in the water cavity extracts water and transports it to the connecting pipe 20 through the pipeline, and transports it to the conveying ring groove 17 through the connecting pipe 20, and then the mixed water flow is mixed with the newly added water in the conveying ring groove 17; thereby achieving the effect of adjustment and compensation, ensuring that the water content of the matrix water in the soilless cultivation pot is always within the set range, thereby ensuring the normal growth of the plant; And because the rotating ring 14 and the fan blades 15 rotate in the soilless cultivation pot, and the detection rod 12 is directly connected to the detection body 1 through the bracket, the detection rod 12 is rotatably connected to the bracket, so that the mixed water flow sprayed by the detection body 1 will impact the detection rod 12 and then drive the detection rod 12 to rotate, and then the combination of several detection rods 12, two rotating rings 14 and several fan blades 15 will stir the substrate water in the soilless cultivation pot, thereby also driving the air to mix with the substrate water, thereby achieving the effect of oxygenating the substrate water.

[0032] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A substrate moisture content detection device with adjustment and compensation functions for soilless cultivation, characterized in that: The detection body (1) comprises a detection body (1), wherein two ends of the detection body (1) are provided with water delivery ports (11), a mixing chamber (2) is provided inside the detection body (1), the water delivery port (11) is communicated with the mixing chamber (2), a plurality of detection rods (12) are provided on the outer wall of the detection body (1), and a moisture sensor is provided inside the detection rods (12); A plurality of water delivery grooves (13) are arranged on the side of the water delivery port (11) away from the detection body (1), a rotating ring (14) is also arranged on the water delivery port (11), and a plurality of fan blades (15) are arranged on the side of the rotating ring (14) close to the water delivery grooves (13).

2. The substrate moisture content detection device with adjustment and compensation functions for soilless cultivation according to claim 1 is characterized in that: A plurality of the water delivery grooves (13) are arranged around the axis of the water delivery port (11), and a plurality of the fan blades (15) are arranged around the axis of the rotating ring (14).

3. The substrate moisture content detection device with adjustment and compensation functions for soilless cultivation according to claim 2 is characterized in that: A magnetic conductor is arranged in the rotating ring (14), an electromagnetic coil is arranged in the inner wall of the water delivery port (11), the fan blade (15) is arc-shaped, and an axis of the fan blade (15) and an axis of the rotating ring (14) form an angle.

4. The substrate moisture content detection device with adjustment and compensation functions for soilless cultivation according to claim 3 is characterized in that: The upper and lower end surfaces of the mixing chamber (2) are provided with a spiral surface (21), the spiral pattern of the spiral surface (21) spreads from the center to the surroundings, and a plurality of guide grooves (22) are provided between the two spiral surfaces (21), and the arrangement direction of the guide grooves (22) is the same as the arrangement direction of the spiral pattern on the spiral surface (21).

5. The substrate moisture content detection device with adjustment and compensation functions for soilless cultivation according to claim 4 is characterized in that: A rotating body (16) is arranged on the outer wall of the detection body (1), and the rotating body (16) is rotatably connected to the detection body (1). A conveying ring groove (17) is arranged on a side of the rotating body (16) close to the mixing chamber (2), and the conveying ring groove (17) is communicated with the mixing chamber (2). A plurality of rotating blades (18) are arranged in the conveying ring groove (17), and the plurality of rotating blades (18) are arranged around the axis of the conveying ring groove (17).

6. The substrate moisture content detection device with adjustment and compensation functions for soilless cultivation according to claim 5, characterized in that: The arrangement direction of the rotating blades (18) is opposite to the arrangement direction of the spiral patterns on the spiral surface (21).

7. A substrate moisture content detection device with adjustment and compensation functions for soilless cultivation according to claim 6, characterized in that: A plurality of delivery pipes (19) are arranged inside the rotating body (16). The plurality of delivery pipes (19) are arranged around the axis of the rotating body (16). One end of the delivery pipe (19) is connected to the delivery ring groove (17), and the other end of the delivery pipe (19) is connected to the outside.

8. The substrate moisture content detection device with adjustment and compensation functions for soilless cultivation according to claim 7, characterized in that: The detection rod (12) is directly connected to the detection body (1) via a bracket, and the detection rod (12) is rotatably connected to the bracket.

9. The substrate moisture content detection device with adjustment and compensation functions for soilless cultivation according to claim 8, characterized in that: The cross-section of the water delivery port (11) and the cross-section of the assembly of the plurality of blades (15) and the rotating ring (14) are both trumpet-shaped.

10. The substrate moisture content detection device with adjustment and compensation functions for soilless cultivation according to claim 9, characterized in that: A connecting pipe (20) is provided between two adjacent detection rods (12), and the connecting pipe (20) is connected to the conveying ring groove (17). A water cavity and a matrix cavity are provided outside the detection body (1), and water pumps are provided in the water cavity and the matrix cavity, and the water pump is connected to the connecting pipe (20) through a pipeline.

Images