An assembled ecological landscape corridor that uses rainwater to supply plant growth

Abstract

The present invention provides an assembled ecological landscape corridor for supplying plant growth with rainwater, which relates to the field of corridors and comprises: a top cover; a support column, which is located below the top cover and is used to support the top cover; a first plate, wherein a plurality of first plates are arranged in an array between two support columns along the height direction of the support column; a second plate is provided between two adjacent first plates, wherein the second plate connects two adjacent first plates end to end, so that the combination of the first plate and the second plate slides along the height direction of the support column to be stacked into a block or stretched into a wall; wherein when stacked into a block, the first plate and the second plate are not connected to each other, and when stretched into a wall, the first plate and the second plate are connected to each other; a locking part, which is locked in the support column and combined with the first plate located at the top; an air distribution system, wherein each locking part is configured with an air distribution system, wherein the first plate and the second plate used for planting plants in the present invention are used to collect rainwater when stretched into a wall, and the combination of the first plate and the second plate is used to store rainwater when folded into a block.

Description

Technical Field

[0001] The invention relates to the field of corridors, and in particular to an assembled ecological landscape corridor that utilizes rainwater to supply plant growth. Background Art

[0002] The combination of plants and corridors is more complex than a single corridor and also requires more maintenance. For this reason, there is no shortage of laying pipes around the corridors, introducing municipal water supply or collecting rainwater to maintain plants. Although the above methods can generally solve the problem of plant maintenance, the basis for solving the above problems includes configuring more infrastructure for the construction of corridors and allocating personnel to use the above facilities. The combined maintenance costs restrict the in-depth development of landscape corridors.

[0003] Rainwater is an important component of surface runoff and an important way to supplement the water needed for plant growth. Therefore, with the utilization of rainwater as the core and combined with corridors, an assembled ecological landscape corridor that uses rainwater to supply plant growth is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide an assembled ecological landscape corridor that uses rainwater to supply plant growth, so as to solve the technical problem that the construction of the corridor requires more infrastructure, and the personnel are assigned to use the above facilities, and the resulting maintenance costs restrict the in-depth development of the landscape corridor.

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

[0006] An assembled ecological landscape corridor utilizing rainwater to supply plant growth comprises:

[0007] Top cover;

[0008] A support column, located below the top cover and used to support the top cover;

[0009] A first plate, a plurality of first plates are arrayed between two support pillars along the height direction of the support pillars;

[0010] A second plate is provided between two adjacent first plates, and the second plate connects the two adjacent first plates end to end, so that the combination of the first plate and the second plate can slide along the height direction of the support column to stack into a block or stretch into a wall;

[0011] When stacked into a block, the first plate and the second plate are not connected to each other, and when stretched into a wall, the first plate and the second plate are connected to each other;

[0012] A locking portion, the locking portion being locked in the support column and combined with the first plate located at the top;

[0013] Air distribution system: each locking part is equipped with an air distribution system, which is hung under the top cover to sense the rain pressure at the top cover;

[0014] Among them, the rain pressure sensed by the valve train is inversely correlated with the friction from the locking part to the strut;

[0015] The first spring is arranged on the support column to support the locking part, and after the locking part is unlocked, the combination of the first plate and the second plate is supported to stretch into a plate, or the first plate and the second plate are fully loaded with water and the first spring is pressed down to make the combination of the first plate and the second plate overlap into a block.

[0016] Preferably, the first plate is water-permeable, and the water-permeable first plate is used to collect rainwater when the combination of the first plate and the second plate is extended into a wall.

[0017] Preferably, the gas distribution system comprises a first sleeve and a second sleeve combined with the first sleeve, wherein the first sleeve is suspended below the top cover and extends to an area in the top cover for storing water;

[0018] A first piston is slidably mounted in the first sleeve;

[0019] A second piston is slidably mounted in the second sleeve;

[0020] The second sleeve also includes a second spring and a first air bag located in the second spring, wherein the ends of the second spring and the first air bag are fixed to the second sleeve and the second piston respectively;

[0021] A connecting rod movable groove is provided at the junction of the first sleeve and the second sleeve, in which a connecting rod for connecting the first piston and the second piston is arranged, so that when rainwater in the top cover presses down the first piston, the connecting rod links the second piston to make the second piston slide down relative to the second sleeve.

[0022] Preferably, an air pipe is provided between the second piston and the locking portion, one end of the air pipe passes through the second piston and into the first air bag, and the other end of the air pipe is connected to the locking portion.

[0023] Preferably, the locking portion comprises a second slider disposed in the support column and slidably engaged with the support column;

[0024] The second slider has a chamber, and the chamber is filled with a second air bag;

[0025] A plurality of friction plate grooves are arranged around the chamber at the second slider, and a friction plate is embedded in each friction plate groove;

[0026] The friction plate is connected to the second air bag and is used to reduce or increase the friction force from the friction plate groove to the support column when the volume of the first air bag increases or decreases.

[0027] Preferably, both ends of the first plate located at the top have first rods, and the first rods extend into the support column and penetrate the locking portion.

[0028] Preferably, the first plate below the uppermost first plate and both ends of the second plate have second rods.

[0029] Preferably, the first rod and the second rod are both provided with a first slider rotatably matched with the first rod and the second rod, and the first slider is located outside the movable range of the locking portion and slidably matched with the support column.

[0030] Preferably, the first plate comprises a plate body, one end of which is concave to form a water-permeable plate, and opposite to the water-permeable plate is a water-absorbing bag placed in the plate body, which is used to store rainwater.

[0031] Preferably, the water-permeable plate has overflow holes on both sides leading to the space where the water-absorbing bag is located, and the overflow holes are used to connect to the second plate.

[0032] The beneficial effects of the present invention are:

[0033] 1. The first board and the second board for planting plants in the present invention form a barrier for retaining water when stretched into a wall, and form a bench for people to sit on when folded into blocks.

[0034] 2. The first plate and the second plate for planting plants in the present invention are used to collect rainwater when stretched into a wall, and the combination of the first plate and the second plate is used to store rainwater when folded into a block. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of an assembled ecological landscape corridor that uses rainwater to supply plant growth;

[0036] Figure 2 for Figure 1 The structural diagram of the assembled ecological landscape corridor in actual application is shown;

[0037] Figure 3 It is a schematic diagram of the structure of the comprehensive treatment component for collecting and using rainwater;

[0038] Figure 4 for Figure 3 The schematic diagram of the structure of the middle support column after being cut sideways;

[0039] Figure 5 for Figure 3 The structural diagram of the central support column after being cut straight;

[0040] Figure 6 The schematic diagram of the combined structure of the gas distribution system, the air pipe and the locking part;

[0041] Figure 7 for Figure 6 The structure diagram of the valve train shown is a frontal section;

[0042] Figure 8 for Figure 6 The structure schematic diagram of the locking part after being cut away;

[0043] Fig. 9 is a schematic diagram of the structure after the middle part of the first plate is cut;

[0044] Fig.10 for Fig. 9 A schematic diagram of the split structure of the first plate shown;

[0045] 1. The axial displacement of the first piston and the axial displacement of the second piston are as follows: 1. The axial displacement of the first piston and the axial displacement of the second piston; 2. The axial displacement of the first piston and the axial displacement of the second piston; 3. The axial displacement of the first piston and the axial displacement of the second piston; 4. The axial displacement of the second piston and the axial displacement of the second piston; 5. The axial displacement of the first piston and the axial displacement of the second piston; 6. The axial displacement of the second piston and the axial displacement of the second piston; 7. The axial displacement of the first piston and the axial displacement of the second piston; 8. The axial displacement of the first piston and the axial displacement of the second piston; 9. The axial displacement of the first piston and the axial displacement of the second piston; 10. The axial displacement of the first piston and the axial displacement of the second piston; 11. The axial displacement of the second piston and the axial displacement of the second piston; 12. The axial displacement of the second piston and the axial displacement of the second piston; 13. The axial displacement of the first piston and the axial displacement of the second piston; 14. The axial displacement of the first piston and the axial displacement of the second piston; 15. The axial displacement of the first piston and the axial displacement of the second piston; 16. The axial displacement of the first piston and the axial displacement of the second piston; 17. The axial displacement of the first piston and the axial displacement of the second piston; 18. The axial displacement of the first piston and the axial displacement of the second piston; 19. The axial displacement of the first piston and the axial displacement of the second piston; 20. The axial displacement of the first piston and the axial displacement of the second piston; 21. The axial displacement of the first piston and the axial displacement of the second piston; 22. The axial displacement of the first piston and the axial displacement of the second piston; 23. The axial displacement of the first piston DETAILED DESCRIPTION

[0046] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0047] The specific embodiments of the present invention are described below with reference to the accompanying drawings. Example 1

[0048] In this embodiment, a prefabricated ecological landscape corridor that uses rainwater to supply plant growth is proposed, such as Figure 1-2 As shown, the main body of the assembled ecological landscape corridor includes a top cover 1, four support columns 6, and a first plate 3 and a second plate 4 located between every two support columns 6.

[0049] Specifically, the top of the top cover 1 has a groove for storing water.

[0050] Four support pillars 6 are scattered at the corners of the top cover 1 for supporting the top cover 1 .

[0051] In addition, the bottom of the support column 6 also has a base column 5, which penetrates into the base from the surface ( Figure 1 Base layer not identified).

[0052] Please continue reading Figure 1A plurality of first plates 3 are arranged in an array between two support pillars 6 along the height direction of the support pillars 6. In addition, a second plate 4 is provided between two adjacent first plates 3. The second plate 4 connects the two adjacent first plates 3 end to end (the first plates 3 and the second plates 4 are connected by Figure 3 The hinge 8 shown is rotatably connected) so that the combination of the first plate 3 and the second plate 4 can slide along the height direction of the support column 6 to stack into a block or stretch into a wall.

[0053] To further explain, Figure 3 The content shown is for reference only. When the combination of the first plate 3 and the second plate 4 is stacked into a block, the first plate 3 and the second plate 4 are not connected to each other. On the contrary, when the combination of the first plate 3 and the second plate 4 is extended into a wall, the first plate 3 and the second plate 4 are connected to each other.

[0054] See also Figure 4 and Figure 5 The basis for the combination of the first plate 3 and the second plate 4 to slide in the height direction of the support column 6 is that the two ends of the top first plate 3 have first rods 10, and the first plate 3 below the top first plate 3 and the two ends of the second plate 4 have second rods 12. In addition, both the first rod 10 and the second rod 12 are provided with a first slider 13 that rotates with the first rod 10 and the second rod 12, and the first slider 13 slides with the support column 6.

[0055] Please continue reading Figure 4 and Figure 5 The kinetic energy required for the combination of the first plate 3 and the second plate 4 to slide in the height direction of the support column 6 lies in the first spring 11 .

[0056] When introducing the first spring 11, it is necessary to explain the locking portion 9. Specifically, the locking portion 9 is locked in the support column 6 and combined with the first plate 3 located at the top (the first rods 10 at both ends of the first plate 3 penetrate into the locking portion 9), and the first spring 11 is placed in the support column 6, and one end thereof is fixed at the locking portion 9 to support the locking portion 9.

[0057] For releasing the kinetic energy of the first spring 11, the following is used: Figure 6-Figure 8 The air distribution system 2 shown, specifically, each locking part 9 is equipped with an air distribution system 2. In addition, the air distribution system 2 is suspended under the top cover 1 to sense the pressure of rainwater on the top cover 1. It should be noted that the rainwater pressure sensed by the air distribution system 2 is inversely correlated with the friction force from the locking part 9 to the support column 6, that is, the greater the rainwater pressure sensed by the air distribution system 2, the smaller the relative friction force of the locking part 9 in the support column 6, and conversely, the smaller the rainwater pressure sensed by the air distribution system 2, the greater the relative friction force of the locking part 9 in the support column 6.

[0058] In combination with the above description, the facts that can be determined include that the rainwater pressure at the top cover 1 is the key process for releasing the kinetic energy accumulated by the first spring 11, that is, the greater the rainwater pressure sensed by the valve system 2, the smaller the relative friction of the locking portion 9 in the support column 6. Therefore, when the relative friction of the locking portion 9 in the support column 6 is less than the elastic force of the first spring 11, the first spring 11 will lift the locking portion 9 to move upward, so that the combination of the first plate 3 and the second plate 4 stretches into a wall. On the contrary, when the first plate 3 and the second plate 4 are fully loaded with rainwater, the combination of the first plate 3 and the second plate 4 will press down the first spring 11, so that the combination of the first plate 3 and the second plate 4 is overlapped into a block.

[0059] To further explain, when the rainwater in the first plate 3 and the second plate 4 is consumed, it indicates that there is no rain outside the corridor, and accompanied by weather conditions such as large evaporation, the rainwater retained on the top cover 1 will be quickly evaporated. In this state, the air distribution system 2 is reset, and the locking part 9 is locked in the support column 6, limiting the elastic deformation of the first spring 11, thereby maintaining the combination of the first plate 3 and the second plate 4 always in the state of being stacked into a block.

[0060] Combination Figure 1-Figure 5 As well as the above-described contents, the core of this embodiment is as follows:

[0061] ① The combination of the first plate 3 and the second plate 4 forms a barrier for retaining water when stretched into a wall, and the combination of the first plate 3 and the second plate 4 forms a bench when folded into a block.

[0062] ② The combination of the first plate 3 and the second plate 4 is used to collect rainwater when stretched into a wall, and the combination of the first plate 3 and the second plate 4 is used to store rainwater when folded into a block.

[0063] ③ Plants are grown by the combination of the first plate 3 and the second plate 4.

[0064] Regarding ①, when the combination of the first plate 3 and the second plate 4 is extended into a wall, a barrier for blocking water is formed, that is, the combination of the first plate 3 and the second plate 4 will be extended into a wall only during raining. Therefore, during raining, the combination of the first plate 3 and the second plate 4 is extended into a wall to form a barrier for blocking rainwater;

[0065] In addition, when the combination of the first plate 3 and the second plate 4 is extended into a wall, the amount of space it intrudes into the corridor is reduced, and as a result, the available space in the corridor increases, which in turn increases the number of people who can stay in the corridor, making it easier for them to avoid rain. On the contrary, when the combination of the first plate 3 and the second plate 4 is stacked into a block, it forms a bench for people to sit on.

[0066] Regarding ②, the first plate 3 is water-permeable. Therefore, when the combination of the first plate 3 and the second plate 4 is extended to form a wall, the first plate 3 collects rainwater, and the first plate 3 and the second plate 4 are in a state of interconnection when extended to form a wall, and the rainwater in the first plate 3 is guided into the second plate 4;

[0067] On the contrary, after the combination of the first plate 3 and the second plate 4 has fully collected rainwater, the combination of the first plate 3 and the second plate 4 will press down the first spring 11, so that the combination of the first plate 3 and the second plate 4 is folded into a block, and based on the fact that the first plate 3 and the second plate 4 are not connected to each other in the folded state, an independent water storage module is formed.

[0068] For ③, Figure 1 As shown, the first plate 3 and the second plate 4 have a recessed portion, which is used for planting plants. In addition, the recessed portion is connected to the water storage area in the first plate 3 and the second plate 4. Therefore, the recessed portion can always receive moisture, thereby continuously supplying moisture to the plants.

[0069] See also Figure 6-Figure 8 The specific configurations of the gas distribution system 2 and the locking portion 9 in Example 1 are as follows:

[0070] like Figure 7 As shown, the gas distribution system 2 includes a first sleeve 21 and a second sleeve 26 combined with the first sleeve 21 . The first sleeve 21 is suspended below the top cover 1 and extends to the area in the top cover 1 for storing water.

[0071] The first piston 22 is slidably mounted in the first sleeve 21 , and the second piston 28 is slidably mounted in the second sleeve 26 .

[0072] In addition, the second sleeve 26 also includes a second spring 27 and a first air bag 25 located in the second spring 27. It should be noted that the ends of the second spring 27 and the first air bag 25 are fixed to the second sleeve 26 and the second piston 28 respectively.

[0073] To further explain, a connecting rod movable groove 24 is provided at the junction of the first sleeve 21 and the second sleeve 26, and a connecting rod 23 for connecting the first piston 22 and the second piston 28 is provided in the connecting rod movable groove 24. When rainwater in the top cover 1 presses down the first piston 22, the connecting rod 23 links the second piston 28 to make the second piston 28 slide down relative to the second sleeve 26.

[0074] like Figure 6 As shown, an air pipe 7 is provided between the second piston 28 and the locking portion 9 , one end of the air pipe 7 passes through the second piston 28 and into the first air bag 25 , and the other end of the air pipe 7 is connected to the locking portion 9 .

[0075] like Figure 8As shown, the locking portion 9 includes a second slider 91 disposed in the support column 6 and slidably matched with the support column 6, wherein the second slider 91 has a cavity, and a second air bag 92 is filled in the cavity.

[0076] A plurality of friction plate grooves 94 are arranged around the cavity at the second sliding block 91 , and a friction plate 93 is embedded in each friction plate groove 94 .

[0077] It should be noted that the friction plate 93 is connected to the second air bag 92 and is used to reduce or increase the friction force from the friction plate groove 94 to the support column 6 when the volume of the first air bag 25 increases or decreases.

[0078] See also Fig. 9 and Fig.10 , the specific configuration of the first plate 3 in Example 1 is as follows:

[0079] The first plate 3 includes a plate body 31 , one end of which is concave to form a water-permeable plate 34 . Opposite to the water-permeable plate 34 is a water-absorbing bag 33 disposed in the plate body 31 , and the water-absorbing bag 33 is used to store rainwater.

[0080] It should be noted that the water-absorbing bag 33 may be a sponge, and the surface of the plate body 31 has a plurality of holes (not marked in the figure), and the holes are used to guide rainwater into the water-absorbing bag 33 .

[0081] In addition, overflow holes 35 leading to the space where the water-absorbing bag 33 is located are provided on both sides of the water-permeable plate 34 , and the overflow holes 35 are used for docking with the second plate 4 .

[0082] The water-permeable plate 34 is connected to the space where the water-absorbing bag 33 is located. Accordingly, the rainwater absorbed by the water-absorbing bag 33 will slowly be replenished into the water-permeable plate 34. In addition, for planting plants on the water-permeable plate 34, the process is to fill the water-permeable plate 34 with a culture matrix and sow seeds or cultivate plants in the culture matrix. It should be noted that the culture matrix is ​​wrapped with a corresponding coating structure. Therefore, even if the plate body 31 rotates, the culture matrix will not fall off.

[0083] Finally, there is a seal 32 on the other side of the water absorbent bag 33 , and the seal 32 is combined with the plate body 31 to form a sealed cavity, which limits the movement of the water absorbent bag 33 and delays the dissipation of water from the water absorbent bag 33 .

[0084] Regarding the second plate 4, its main body is a mirror image of the first plate 3, but the holes in the second plate 4 for connecting the overflow holes 35 are located on both sides of the sealing body in the second plate 4 for blocking the water-absorbing material, that is, see Figure 1 or Figure 3In the enlarged figure, the corresponding position of the overflow hole 35 is just on both sides of the sealing body used to seal the water-absorbing material in the second plate 4. Therefore, in order to better enable the first plate 3 and the second plate 4 to communicate with each other, the hole positions used for docking in the second plate 4 are adjusted accordingly.

[0085] Please continue reading Figure 1 The portion of the first plate 3 and the second plate 4 used for accommodating the culture matrix is ​​always facing downward during the process of the combination of the first plate 3 and the second plate 4 extending into a wall. The advantage of such an arrangement is that the first plate 3 and the second plate 4 can be staggered to plant plants, giving the plants sufficient growth space.

[0086] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0087] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An assembled ecological landscape corridor that uses rainwater to supply plant growth, characterized in that: include: Top cover; A support column, located below the top cover and used to support the top cover; A first plate, a plurality of first plates are arrayed between two support pillars along the height direction of the support pillars; A second plate is provided between two adjacent first plates, and the second plate connects the two adjacent first plates end to end, so that the combination of the first plate and the second plate can slide along the height direction of the support column to stack into a block or stretch into a wall; When stacked into a block, the first plate and the second plate are not connected to each other, and when stretched into a wall, the first plate and the second plate are connected to each other; A locking portion, the locking portion being locked in the support column and combined with the first plate located at the top; Air distribution system: each locking part is equipped with an air distribution system, which is hung under the top cover to sense the rain pressure at the top cover; Among them, the rain pressure sensed by the valve train is inversely correlated with the friction from the locking part to the strut; The first spring is arranged on the support column to support the locking part, and after the locking part is unlocked, the combination of the first plate and the second plate is supported to stretch into a wall, or the first plate and the second plate are fully loaded with water and the first spring is pressed down to make the combination of the first plate and the second plate overlap into a block.

2. The assembled ecological landscape corridor using rainwater to supply plant growth according to claim 1 is characterized by: The first plate is water permeable and is used to collect rainwater when the combination of the first plate and the second plate is extended into a wall.

3. The assembled ecological landscape corridor using rainwater to supply plant growth according to claim 1 is characterized by: The gas distribution system includes a first sleeve and a second sleeve combined with the first sleeve, wherein the first sleeve is suspended below the top cover and extends to an area in the top cover for storing water; A first piston is slidably mounted in the first sleeve; A second piston is slidably mounted in the second sleeve; The second sleeve also includes a second spring and a first air bag located in the second spring, wherein the ends of the second spring and the first air bag are fixed to the second sleeve and the second piston respectively; A connecting rod movable groove is provided at the junction of the first sleeve and the second sleeve, in which a connecting rod for connecting the first piston and the second piston is provided. When rainwater in the top cover presses down the first piston, the connecting rod links the second piston to make the second piston slide down relative to the second sleeve.

4. The assembled ecological landscape corridor using rainwater to supply plant growth according to claim 3 is characterized by: An air pipe is provided between the second piston and the locking part. One end of the air pipe passes through the second piston and penetrates into the first air bag, and the other end of the air pipe is connected to the locking part.

5. The assembled ecological landscape corridor using rainwater to supply plant growth according to claim 4 is characterized by: The locking portion includes a second slider disposed in the support column and slidably matched with the support column; The second slider has a chamber, and the chamber is filled with a second air bag; A plurality of friction plate grooves are arranged around the chamber at the second slider, and a friction plate is embedded in each friction plate groove; The friction plate is connected to the second air bag and is used to reduce or increase the friction force from the friction plate groove to the support column when the volume of the first air bag increases or decreases.

6. The assembled ecological landscape corridor using rainwater to supply plant growth according to claim 1 is characterized by: The first plate at the top has first rods at both ends, and the first rods extend into the support column and penetrate the locking portion.

7. The assembled ecological landscape corridor using rainwater to supply plant growth according to claim 6 is characterized by: The first plate below the uppermost first plate and both ends of the second plate have second rods.

8. The assembled ecological landscape corridor using rainwater to supply plant growth according to claim 7 is characterized by: The first rod and the second rod are both provided with a first slider which is rotatably matched with the first rod and the second rod. The first slider is located outside the movable range of the locking part and is slidably matched with the support column.

9. The assembled ecological landscape corridor using rainwater to supply plant growth according to claim 1 is characterized by: The first plate comprises a plate body, one end of which is concave to form a water-permeable plate, and opposite to the water-permeable plate is a water-absorbing bag placed in the plate body, which is used to store rainwater.

10. The assembled ecological landscape corridor using rainwater to supply plant growth according to claim 9 is characterized by: Both sides of the water-permeable plate are provided with overflow holes leading into the space where the water-absorbing bag is located, and the overflow holes are used for docking with the second plate.

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