Cultivation tank

Abstract

The utility model belongs to the technical field of agricultural soilless culture, and particularly discloses a cultivation trough which comprises a cultivation trough body, the cultivation trough body comprises an inner-layer trough and an outer-layer trough, the inner-layer trough is located on the inner side of the outer-layer trough, and a gap is formed between the inner-layer trough and the outer-layer trough. A closed end is arranged between the upper end opening of the inner-layer groove and the upper end opening of the outer-layer groove; the two ends of the cultivation groove body are connected with end covers, and the end covers are provided with first communicating holes communicating with the gap between the outer-layer groove and the inner-layer groove. The heat exchange efficiency can be improved when the temperature of the plant roots is controlled, and the oxygen concentration of the plant roots can be artificially and freely intervened.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural soilless cultivation, in particular to a cultivation trough. Background Art

[0002] The development of soilless cultivation has gone through the budding period, experimental research period, production application period, large-scale intensive and automated production period. Soilless cultivation forms include aeroponics, hydroponics, and substrate cultivation. Regardless of the stage of soilless cultivation, especially the substrate cultivation form, cultivation troughs are needed as containers for substrates, otherwise soilless cultivation is out of the question.

[0003] Cultivation troughs were initially made of bamboo and reeds to make small rafts, then bricks to build troughs to hold cultivation substrates, and then later developed into trapezoidal cultivation troughs made of polymer composite materials or foam, and U-shaped cultivation troughs made of iron pipes and cloth. These cultivation troughs solve the problem of holding and fixing the substrate from a technical perspective, but from the perspective of modern scientific and technological agricultural requirements, these cultivation troughs have simple structures and single functions, and cannot meet the requirements for high quality and high yield of agricultural and sideline products in soilless agricultural production.

[0004] With the development of soilless cultivation, people have been able to implement artificial intervention on most of the factors of plant growth (such as sunlight, temperature, carbon dioxide, nutrients, water, soil), and even intelligent control. Among the six major factors required for plant growth, only the oxygen concentration of plant roots has not yet been freely controlled by humans. Only in hydroponics can the roots be exposed to the air intermittently to solve the problem of plant roots absorbing oxygen. In the process of substrate cultivation, due to the lack of corresponding cultivation equipment and planting technology, the oxygen demand of plant roots can only be obtained by air infiltration into the substrate, or by dissolved oxygen brought in during fertilizer and water management.

[0005] Practice has shown that due to the lack of human intervention in oxygen, the oxygen content in the substrate is restricted by many factors during the substrate cultivation process, such as the area of ​​contact between air and substrate, the physical and chemical properties of the substrate itself, changes in oxygen content in the greenhouse, the frequency and amount of irrigation, etc., resulting in insufficient oxygen content in the substrate. This is an important reason why many plants do not grow strongly during substrate cultivation and soilless cultivation.

[0006] In the production process, the temperature of the plant growth environment is mostly controlled by burning diesel, natural gas, coal and electricity to increase the temperature, using wet curtains, fans and sunshade nets to cool down, and some farms even use high-power air conditioners to increase and decrease the temperature. These methods have one thing in common, that is, they all control the temperature of the plant's external growth space, and do not involve facilities and methods for controlling the temperature of the plant's roots. In addition, the space for controlling the temperature of the external space is very large, which leads to low efficiency and high cost in the production process. Utility Model Content

[0007] The utility model provides a cultivation trough, which aims to improve the heat exchange efficiency when controlling the temperature of plant roots and realize active human intervention on the oxygen concentration of plant roots.

[0008] The utility model is realized by the following technical scheme: a cultivation trough, comprising a cultivation trough body, wherein the cultivation trough body comprises an inner layer trough and an outer layer trough, wherein the inner layer trough is located inside the outer layer trough and has a gap with the outer layer trough, and the upper end of the inner layer trough and the upper end of the outer layer trough are closed ends;

[0009] Both ends of the cultivation trough body are connected with end covers, and the end covers are provided with a first communicating hole which communicates with the gap between the outer layer trough and the inner layer trough.

[0010] Compared with the prior art, this solution has the following advantages and beneficial effects:

[0011] When it is necessary to adjust and control the temperature of the plant roots, it is only necessary to inject cold water or hot water into the hollow part between the inner groove and the outer groove through the connecting hole on the end cover to control the temperature. The cultivation trough body in this scheme is a double-layer hollow design, and the bottom of the inner groove of the cultivation trough body is a groove design, and both sides of the groove and both sides of the inner groove are hollow structures, which can surround the substrate inside the inner groove, have a large indirect contact area with the substrate, a large temperature control area, greatly improve the heat exchange efficiency, and can achieve the temperature control effect faster.

[0012] Furthermore, a groove is provided at the bottom of the inner layer tank, a filter screen is laid on the groove, and a second connecting hole communicating with the groove is opened at the lower part of the end cover.

[0013] Beneficial effect: After the entire cultivation trough is installed, a hard and fine filter is laid on the upper part of the concave mouth of the inner trough. After the substrate is filled, a closed space is formed in the groove at the bottom of the inner trough. This space is connected to the outside world through the second connecting hole at the lower part of the end cover. In this solution, pressurized fresh air can be actively added to the bottom of the substrate in the cultivation trough through the second connecting hole to ensure that there is sufficient oxygen in the substrate, which can well solve the problem of insufficient oxygen content in the substrate, thereby improving the growth environment of the plant, or used to flow out excess nutrient solution.

[0014] Furthermore, the first connecting hole includes a drainage hole and a water inlet hole, and external liquid can enter the gap between the outer groove and the inner groove from the water inlet hole, and the liquid in the gap between the outer groove and the inner groove can be discharged from the drainage hole.

[0015] Beneficial effect: In the present solution, the first connecting hole includes a drainage hole and a water inlet hole, so that water inlet and drainage can be achieved through the water inlet hole and the drainage hole respectively, making the entire temperature control process more convenient and simple to operate.

[0016] Furthermore, the second communication hole includes an air inlet hole and a liquid discharge hole, and the air inlet hole and the liquid discharge hole are arranged opposite to the groove.

[0017] Beneficial effects: In this solution, the groove space at the bottom of the inner groove is connected to the outside world through the air inlet and drainage holes at the bottom of the end cover. Pressurized fresh air can be actively added to the bottom of the matrix in the cultivation trough through the air inlet to ensure that there is sufficient oxygen in the matrix. This can effectively solve the problem of insufficient oxygen content in the matrix, thereby improving the growth environment of the plants. The drainage holes are set to discharge excess nutrient solution.

[0018] Furthermore, the bottom of the groove overlaps and is connected to the bottom of the outer groove, and the groove divides the gap between the inner groove and the outer groove into independent left and right cavities; the first connecting hole includes a drainage hole and a water inlet hole, and there are two drainage holes and two water inlet holes on the end cover, the two drainage holes are respectively located on both sides of the end cover and are respectively connected to the left cavity and the right cavity, and the two water inlet holes are respectively located at both ends of the end cover and are respectively connected to the left cavity and the right cavity.

[0019] Beneficial effects: In this scheme, the groove divides the gap between the inner groove and the outer groove into two independent chambers. The two chambers are not connected to each other. The two independent closed chambers are connected to the outside through the drainage hole and the water inlet hole on the end cover. Since the cultivation trough in the greenhouse is relatively long, through this design of the scheme, water can be added to the internal chamber at both ends of the cultivation trough, so that the water flow directions at both ends of the cultivation trough are opposite, thereby greatly improving the efficiency of heat exchange and making the substrate temperature control more uniform.

[0020] Furthermore, the water inlet hole is located at the upper part of the end cover, and the drainage hole is located at the lower part of the end cover.

[0021] Beneficial effect: The drainage hole is arranged at the lower part of the end cover, which is more convenient when draining water, and the water can be automatically drained from the lower part by its own weight.

[0022] Furthermore, the end cover includes an end cover cover surface and a connecting section, the shape of the connecting section matches the cross-sectional shape of the cultivation trough body, the end cover cover surface is connected to one end of the connecting section, and the connecting section can be sleeved on the outer groove and the inner groove of the cultivation trough body, and the first connecting hole is located on the end cover cover surface.

[0023] Beneficial effect: The end cover surface in this solution matches the cross section of the cultivation trough body, so that it is convenient to tightly connect the entire end cover end surface with the end of the cultivation trough body by glue, thereby playing the role of blocking the end of the cultivation trough body, making the cavity between the inner layer groove and the outer layer groove of the cultivation trough body relatively closed, and also achieving the purpose of sealing the cultivation trough port, so that after the matrix is ​​placed in the inner layer groove of the cultivation trough, it can prevent the matrix from leaking from both ends of the cultivation trough. And the internal space of the cultivation trough can be connected with the outside world through the first connecting hole on the end cover surface, which is convenient for injecting air or liquid into the hollow layer of the cultivation trough.

[0024] Furthermore, the end cover includes an end cover cover surface and a connecting section, the shape of the connecting section matches the cross-sectional shape of the cultivation trough body, and the connecting section can be inserted into the gap at the end of the cultivation trough body, and the first connecting hole is located on the connecting section.

[0025] Beneficial effect: The end cap in this solution adopts another method, in which the connecting section is inserted into the gap at the end of the cultivation trough, so as to communicate with the outside world through the first through hole on the connecting section, so as to facilitate the injection of air or liquid into the hollow layer of the cultivation trough. The end cap cover in this solution can achieve the purpose of closing the port of the cultivation trough body, preventing the matrix from leaking out from both ends of the cultivation trough.

[0026] Furthermore, the cultivation trough bodies are provided with at least two, and two adjacent cultivation trough bodies are spliced ​​together through a connector to form an entire cultivation trough, and two end covers are respectively connected to the two ends of each assembled entire cultivation trough.

[0027] Beneficial effects: This solution can, when encountering a large planting area, mass-produce multiple independent cultivation trough bodies, and splice the multiple independent cultivation trough bodies on site according to the actual planting area to form a whole cultivation trough. When the splicing and assembly are completed, end covers can be installed at both ends. This is more flexible and convenient in production and transportation, and is also convenient for flexible installation at the planting site.

[0028] Furthermore, a connecting head is provided between two adjacent cultivation trough bodies, the cross-sectional shape of the connecting head matches the cross-sectional shape of the cultivation trough body, and the two adjacent cultivation trough bodies can be respectively inserted into the inner sides of both ends of the connecting head and connected by glue.

[0029] Beneficial effect: In this solution, two adjacent cultivation trough bodies are connected by a connector using glue, and the assembly efficiency is higher. The connector can play a role of limiting connection for the ends of the two adjacent cultivation trough bodies, so that the entire structure of the connected cultivation trough is stable, firm and leak-proof. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0031] Figure 1 This is a three-dimensional diagram of the cultivation trough body and the end cover after being assembled in Embodiment 1 of the cultivation trough of the utility model;

[0032] Figure 2 It is a longitudinal cross-sectional view of a cultivation trough body in Embodiment 1 of a cultivation trough of the utility model;

[0033] Figure 3 This is a three-dimensional diagram of a cultivation trough embodiment 1 of the utility model after a filter screen is laid on the groove;

[0034] Figure 4 This is a three-dimensional diagram I of the end cover in Embodiment 1 of a cultivation trough of the utility model;

[0035] Figure 5 This is a three-dimensional diagram II of the end cover in Embodiment 1 of a cultivation trough of the utility model;

[0036] Figure 6 This is a three-dimensional diagram of a plurality of cultivation trough bodies assembled in Embodiment 2 of a cultivation trough of the utility model;

[0037] Figure 7 It is a side view of a plurality of cultivation trough bodies assembled in Embodiment 2 of a cultivation trough of the utility model;

[0038] Figure 8 This is a stereoscopic diagram of a connector in a cultivation trough embodiment 2 of the utility model;

[0039] Fig. 9 This is a stereoscopic diagram of a connector in a cultivation trough embodiment 3 of the utility model;

[0040] Fig.10 This is a three-dimensional diagram of a cultivation trough embodiment 4 of the utility model after the end cover is connected to the cultivation trough body;

[0041] Fig.11 This is a front view of a cultivation trough embodiment 4 of the utility model after the connector, the cultivation trough body and the end cover are connected to each other.

[0042] Fig.12 It is a cultivation trough structure in the prior art;

[0043] Fig.13 It is another cultivation trough structure in the prior art;

[0044] Marks and corresponding parts names in the attached drawings:

[0045] Cultivation trough body 1, inner trough 101, outer trough 102, connector 2, barrier section 201, end cover 3, end cover cover surface 301, connection section 302, water inlet 303, drainage hole 304, air inlet 305, drainage hole 306, filter screen 4, groove 5. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0047] Example 1

[0048] like Figure 1-Figure 3 As shown, this embodiment 1 provides a cultivation trough, including a cultivation trough body 1, and the cultivation trough body 1 includes an inner layer trough 101 and an outer layer trough 102. In this embodiment, the inner layer trough 101 and the outer layer trough 102 are both trapezoidal trough structures, and the inner layer trough 101 is located on the inner side of the outer layer trough 102 and has a gap with the outer layer trough 102, and the upper end of the inner layer trough 101 and the upper end of the outer layer trough 102 are closed ends, so that the interlayer of the cultivation trough body 1 is a hollow chamber, forming a double-layer structure.

[0049] In this embodiment, a groove 5 is provided at the bottom of the inner groove 101, and the groove 5 is located in the middle of the bottom of the inner groove 101. Figure 2 and Figure 3 As shown, a filter screen 4 is laid on the groove 5. In this embodiment, the filter screen 4 is a hard filter screen, which has a certain strength and can withstand the weight of the matrix injected into the cultivation trough later. The hard filter screen can prevent the filter screen from being deformed after filling the matrix.

[0050] In this embodiment, the filter screen 4 is laid on the bottom of the inner groove 101 and covers the top of the groove 5 , and a second connecting hole communicating with the groove 5 is opened at the lower part of the end cover 3 .

[0051] Combination Figure 1 As shown, both ends of the cultivation trough body 1 are connected with end covers 3, and a first connecting hole communicating with the gap between the outer layer trough 102 and the inner layer trough 101 is opened on the end cover 3, and the first connecting hole includes a drainage hole 304 and a water inlet hole 303. External liquid can enter the gap between the outer layer trough 102 and the inner layer trough 101 from the water inlet hole 303, and the liquid in the gap between the outer layer trough 102 and the inner layer trough 101 can be discharged from the drainage hole 304.

[0052] The second communication hole at the bottom of the end cover 3 includes an air inlet hole 305 and a liquid discharge hole 306, and the air inlet hole 305 and the liquid discharge hole 306 are arranged opposite to the groove 5, so that when the inner layer groove 101 is filled with the matrix, the groove 5 and the filter screen 4 can form a closed space, and the groove 5 is connected to the outside through the air inlet hole 305 and the liquid discharge hole 306 on the end cover 3.

[0053] like Figure 2 As shown, in this embodiment, the bottom of the groove 5 overlaps and connects with the bottom of the outer groove 102, and the groove 5 divides the gap between the inner groove 101 and the outer groove 102 into independent left and right cavities; the end cover 3 is provided with two drainage holes 304 and two water inlet holes 303, the two drainage holes 304 are respectively located on both sides of the end cover 3 and are connected to the left and right cavities respectively, and the two water inlet holes 303 are respectively located at both ends of the end surface of the end cover 3 and are connected to the left and right cavities respectively. In this embodiment, the water inlet hole 303 is located at the upper part of the end cover 3, and the drainage hole 304 is located at the lower part of the end cover 3.

[0054] Combination Figure 4 and Figure 5 As shown, the end cover 3 in this embodiment includes an end cover cover surface 301 and a connecting section 302. The shape of the connecting section 302 matches the cross-sectional shape of the cultivation trough body 1. The end cover cover surface 301 is connected to one end of the connecting section 302. In this embodiment, the end cover cover surface 301 and the connecting section 302 are integrally formed or connected by gluing, and the first connecting hole and the second connecting hole are both located on the end cover cover surface 301.

[0055] The connecting section 302 is sleeved on the end of the cultivation trough body 1, that is, the connecting section 302 can be sleeved on the outer groove and the inner groove of the cultivation trough body 1, and the inner side size of the connecting section 302 is larger than the size of the end face of the cultivation trough body 1, so that it is easy to quickly sleeve on the end of the cultivation trough body 1 and achieve clearance fit with the end of the cultivation trough body 1. In this embodiment, the connecting section 302 is tightly connected with the outer wall of the outer groove 102 of the hollow cultivation trough body 1 and the inner wall of the inner groove 101 by glue, and the air inlet 305, the drainage hole 306, the water inlet 303 and the drainage hole 304 are all located on the end cover 301. After the connecting section 302 of the end cover 3 in this embodiment is tightly connected with the end of the cultivation trough body 1 by glue, the two ends of the cultivation trough can be sealed, thereby preventing the loss of substrate and water leakage of the cultivation trough.

[0056] The specific implementation process is as follows:

[0057] a) Working principle and process of active oxygen control of plant roots:

[0058] The working principle of active oxygen control in plant roots is the movement and flow of air, as well as convection and diffusion. There is a concentration gradient between the atmosphere and the soil. When the soil respires, it absorbs oxygen and emits carbon dioxide. At this time, the oxygen concentration in the soil is lower than the oxygen concentration in the atmosphere, while the carbon dioxide concentration in the soil is higher than the carbon dioxide concentration in the atmosphere. Under the action of the concentration gradient, oxygen will diffuse from the high-concentration air to the soil, and carbon dioxide will diffuse from the high-concentration soil to the air. Factors that affect the movement between the atmosphere and soil gases include meteorology, soil properties and agricultural measures.

[0059] b) Working principle and process of plant root temperature energy-saving control:

[0060] The working principle of plant root temperature control is the first law of thermodynamics and the phenomenon of heat transfer due to temperature difference. As long as there is a temperature difference between objects, heat will spontaneously transfer from the high-temperature object to the low-temperature object until the temperature between the objects reaches equilibrium.

[0061] The principle of actively controlling oxygen at the roots of plants using the cultivation trough in this embodiment is as follows:

[0062] A. Active oxygen control process of plant roots:

[0063] The traditional cultivation trough only adopts a layer of trapezoidal structure design (such as Fig.12 ), there is also a design that uses a groove 5 structure at the bottom of the cultivation trough (such as Fig.13 ), but both ends of these two cultivation troughs are sealed with a sealed end cap, and only the bottom or both ends of the cultivation trough have drainage holes 304. In production practice, after the cultivation substrate fills the entire cultivation trough, the left, right and bottom three sides of the substrate are isolated from the atmosphere. Even if the fresh air entering from the drainage holes 304 can move to the bottom of the cultivation trough, due to the limitations of the cultivation trough design and the influence of the cultivation trough length during production, it is not conducive to the movement of air. Then the oxygen content of the entire substrate depends on two channels, one is the diffusion of air in contact with the substrate at the top, and the other is the dissolved oxygen brought by the irrigation nutrient solution.

[0064] Practice has proved that when using traditional cultivation troughs for soilless cultivation, due to the limited area of ​​oxygen diffusion and the small amount of dissolved oxygen brought by the nutrient solution, the oxygen content in the entire cultivation trough matrix is ​​insufficient. This is an important reason why the growth of soilless plants using traditional cultivation troughs is not as good as that of soil cultivation. The structural characteristics of the cultivation trough of the utility model can actively supplement the bottom of the matrix with pressurized fresh air through the air inlet 305 on the end cover 301, which well solves the problem of insufficient oxygen content in the matrix.

[0065] Specifically: after the entire cultivation trough is installed, a hard fine filter screen 4 is laid on the upper part of the groove 5 at the bottom of the inner groove 101. The filter screen 4 can prevent the substrate from falling into the groove 5 and clogging the groove 5, and can also play the role of filtering water and ventilation.

[0066] After the inner groove 101 is filled with the matrix, the groove 5 at the lower part of the inner groove 101 forms a closed space, which is communicated with the outside world through the air inlet hole 305 and the drainage hole 306 at the middle bottom of the end cover 301. Among these two holes, the drainage hole 306 is used to flow out excess nutrient solution, and the air inlet hole 305 is used to fill air into the bottom space.

[0067] According to the demand law of plants for oxygen, fresh air is filled into the enclosed space below the substrate through the air inlet holes 305 on the cover surfaces 301 of the end covers at both ends of the cultivation trough, and oxygen continuously diffuses and flows from the bottom of the substrate to the substrate. At the same time, the air pressure is appropriately increased when filling the air to keep a certain air pressure in the enclosed space below the substrate, so that the flow rate of oxygen into the substrate will be accelerated, which ensures the stability of the oxygen content in the substrate, and also maximizes the stability of the plant's respiration.

[0068] B Plant root temperature energy-saving control process:

[0069] In the greenhouse production process, when it comes to temperature control, it is all about the external space where the plants grow, that is, the temperature inside the greenhouse. There are few facilities, equipment and methods for controlling the temperature of the small environment of the plant roots. Some farms use one or two PVC pipes to increase the substrate temperature by passing hot water through the pipes, but the contact area between the heating pipe and the substrate is too small, and the heat transfer efficiency is not high. In practice, the effect is not good. And it is only applicable to winter heating.

[0070] The utility model adopts a concave double-layer hollow design. The two sides and the two sides of the bottom of the cultivation trough body 1 are hollow. The left cavity and the right cavity are bounded by the bottom of the groove 5 and are not connected to each other. This independent closed space is connected to the outside world through the water inlet holes 303 on the upper left and right sides of the end cover surface 301 and the drainage holes 304 on the lower part, as well as the air inlet hole 305 and the drainage hole 306 at the center of the lower part of the end cover surface 301. The two water inlet holes 303 on the upper side are used to enter and exit cold (hot) water, and the two drainage holes 304 on the lower side are used to drain water after the temperature control is completed.

[0071] In this embodiment, the temperature control water uses groundwater of about 17 degrees Celsius as an example. When the temperature of the external space where the plant grows is lower than (higher than) the lowest (highest) value of the suitable growth temperature, the root temperature control system is activated, and groundwater of about 17 degrees Celsius is injected into the gap of the cultivation trough from the water inlet hole 303 at the upper end of the end cover 3 through the external water supply system. When the groundwater fills the entire gap, it is equivalent to the groundwater of about 17 degrees Celsius surrounding the left and right sides of the entire matrix and a part of the bottom. In the process of injecting water, water can be injected at both ends of the cultivation trough, so that the water flow directions on the left and right sides of the inner groove 101 are opposite, which can improve the heat exchange efficiency more evenly. According to the first law of thermodynamics, groundwater at about 17 degrees Celsius transfers heat with the inner wall of the cultivation trough and the matrix. In winter, the heat of the groundwater is transferred to the low-temperature matrix, and the matrix is ​​heated up. In summer, the heat of the matrix is ​​transferred to the groundwater, and the matrix is ​​cooled down.

[0072] In this embodiment, root substrate temperature control is adopted. Based on the double-layer hollow design of the cultivation trough, the contact area between groundwater and the cultivation trough substrate is greatly increased, thereby greatly improving the heat exchange efficiency. At the same time, the left and right hollow parts form an independent sealed space after installation, and only the air inlet hole 305 and the drainage hole 306 on the end cover surface 301 are connected to it, which makes it possible to implement temperature control using different media such as steam, warm air, etc.

[0073] In practice, the root temperature can be controlled at a low temperature of about 7 degrees Celsius and a high temperature of about 27 degrees Celsius. At the same time, the cost of groundwater is very low, about 0.2 yuan / ton, and the cost of the entire root temperature control is very low. It has been proven that as long as the root environment temperature is controlled to a suitable range, the adverse effects of external low (high) temperature on plants will be greatly reduced, especially the adverse effects of high temperature on plants will be very limited. If the temperature control of the external space of the plant is laid, the range of the external space temperature control can be relaxed, reducing the cost of the external space temperature control of the plant.

[0074] Example 2

[0075] like Figure 6 and Figure 7 As shown, the difference between this embodiment and embodiment 1 is that the cultivation trough at the planting site has at least two cultivation trough bodies 1, two adjacent cultivation trough bodies 1 are spliced ​​together to form a cultivation trough as a whole, and two end covers 3 are respectively connected to the two ends of each assembled cultivation trough as a whole. The number of cultivation trough bodies 1 is reasonably spliced ​​and assembled according to the on-site installation area or actual needs.

[0076] In this embodiment, a connector 2 is provided between two adjacent cultivation trough bodies 1. Figure 8As shown, the cross-sectional shape of the connector 2 matches the cross-sectional shape of the cultivation trough body 1. The interior of the connector 2 is hollow, and the inner size of the connector 2 is slightly larger than the outer size of the cultivation trough body 1. In this way, two adjacent cultivation trough bodies 1 can be respectively inserted into the inner sides of the two ends of the connector 2 to achieve connection, that is, the two ends of the connector 2 are sleeved on the ends of the cultivation trough body 1.

[0077] This embodiment can meet the actual cultivation trough length requirement through on-site splicing and assembly on the basis of reducing the cultivation trough length.

[0078] The connection points between traditional single-layer cultivation troughs after assembly are not strong enough and have poor airtightness, which will leak or break quickly in production practice. The utility model adopts a concave double-layer design for the connector 2 and the cultivation trough body 1, which is similar to a special-shaped pipe. When connected, the connector 2 and the cultivation trough body 1 are firmly glued with glue, just like a general pipe connection, which greatly enhances the strength and airtightness of the connection part and the entire cultivation trough, and can effectively avoid the occurrence of breakage and leakage.

[0079] Example 3

[0080] like Fig. 9 As shown, the difference between this embodiment and embodiment 3 is that: the hollow cavity of the connector 2 in this embodiment is connected to a barrier section 201, and the barrier section 201 and the connector 1 are integrally injection-molded in this embodiment.

[0081] The barrier section 201 is a hollow structure, that is, both ends of the barrier section 201 are connected, so that after the connecting head 2 is connected to two adjacent cultivation trough bodies 1, the two cultivation trough bodies 1 can be communicated with each other. At the same time, due to the setting of the barrier section 201, the ends of the two mutually spliced ​​cultivation trough bodies 1 can be positioned to avoid the cultivation trough bodies 1 completely passing through the connecting head, thereby ensuring the accuracy of the connection between the cultivation trough bodies 1 and improving the efficiency of assembly.

[0082] Example 4

[0083] The difference between this embodiment and embodiment 1 and embodiment 2 is that Fig.10 and Fig.11 As shown, in this embodiment, the end cover 3 also includes an end cover cover surface 301 and a connecting section 302, and the shape of the connecting section 302 matches the cross-sectional shape of the cultivation trough body 1. The connecting section 302 can be inserted into the gap at the end of the cultivation trough body 1, and the first connecting hole and the second connecting hole are located on the connecting section 302.

[0084] This embodiment adopts another structural form of the end cover. In this embodiment, the connecting section 302 is inserted into the gap between the inner groove 101 and the outer groove 102 and the groove 5.

[0085] In this embodiment, the end cover surface 301 is located on the inner side of the connecting section 302 and is connected to the connecting section 302. The end cover surface 301 and the connecting section 302 can be formed as one piece, or can be connected by fixing methods such as snap connection and bolt connection. The connecting section 302 is glued to the inside of the inner layer groove and the outer layer groove. The air inlet 305, the drainage hole 306, the water inlet 303 and the drainage hole 304 are all located on the connecting section 302, so that the cavity inside the cultivation trough body 1 is connected to the outside world, and it is convenient to inject liquid or gas into the internal space of the cultivation trough body 1, and the end cover surface 301 can seal the two ends of the formed cultivation trough, thereby avoiding the loss of the substrate of the cultivation trough.

[0086] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

[0087] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0088] In the description of this document, terms such as "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation orientations of the various components or components.

[0089] In the description of this document, some terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0090] In the description of this document, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0091] The structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in this technical briefing book for technical personnel in this field to understand and read, and are not used to limit the restrictive conditions for the implementation of this application. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0092] The terms used in this document are those common terms currently widely used in the art in consideration of the functions of the present disclosure, but these terms may vary according to the intention of a person of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the document should not be understood as simple names, but rather as an overall description based on the meaning of the terms and the present disclosure.

[0093] Flowcharts or text are used in this document to illustrate the operating steps performed according to the embodiments of the present application. It should be understood that the operating steps in the embodiments of the present application are not necessarily accurately performed in the order of recording. On the contrary, various steps can be processed in reverse order or simultaneously as needed. At the same time, other operations can also be added to these processes, or a certain step or several steps can be removed from these processes.

[0094] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A cultivation trough, comprising a cultivation trough body, characterized in that: The cultivation trough body comprises an inner layer trough and an outer layer trough, wherein the inner layer trough is located inside the outer layer trough and has a gap with the outer layer trough, and a closed end is formed between an upper end of the inner layer trough and an upper end of the outer layer trough; Both ends of the cultivation trough body are connected with end covers, and the end covers are provided with a first communicating hole which communicates with the gap between the outer layer trough and the inner layer trough.

2. A cultivation trough according to claim 1, characterized in that: A groove is provided at the bottom of the inner layer tank, a filter screen is laid on the groove, and a second communication hole communicating with the groove is opened at the lower part of the end cover.

3. A cultivation trough according to claim 1, characterized in that: The first connecting hole includes a drainage hole and a water inlet hole. External liquid can enter the gap between the outer groove and the inner groove from the water inlet hole, and the liquid in the gap between the outer groove and the inner groove can be discharged from the drainage hole.

4. A cultivation trough according to claim 2, characterized in that: The second communication hole includes an air inlet hole and a liquid discharge hole, and the air inlet hole and the liquid discharge hole are arranged opposite to the groove.

5. A cultivation trough according to claim 2, characterized in that: The bottom of the groove overlaps and is connected to the bottom of the outer groove, and the groove divides the gap between the inner groove and the outer groove into independent left and right cavities; the first connecting hole includes a drainage hole and a water inlet hole, and there are two drainage holes and two water inlet holes on the end cover, the two drainage holes are respectively located on both sides of the end cover and are respectively connected to the left cavity and the right cavity, and the two water inlet holes are respectively located at both ends of the end cover and are respectively connected to the left cavity and the right cavity.

6. A cultivation trough according to claim 3 or 5, characterized in that: The water inlet hole is located at the upper part of the end cover, and the drainage hole is located at the lower part of the end cover.

7. A cultivation trough according to claim 1, characterized in that: The end cover includes an end cover cover surface and a connecting section, the shape of the connecting section matches the cross-sectional shape of the cultivation trough body, the end cover cover surface is connected to one end of the connecting section, and the connecting section can be sleeved on the outer groove and the inner groove of the cultivation trough body, and the first connecting hole is located on the end cover cover surface.

8. A cultivation trough according to claim 1, characterized in that: The end cover comprises an end cover cover surface and a connecting section, the shape of the connecting section matches the cross-sectional shape of the cultivation trough body, and the connecting section can be inserted into the gap at the end of the cultivation trough body, and the first connecting hole is located on the connecting section.

9. A cultivation trough according to claim 1, characterized in that: The cultivation trough bodies are provided with at least two, and two adjacent cultivation trough bodies are spliced ​​together to form a cultivation trough as a whole, and two end covers are respectively connected to the two ends of each assembled cultivation trough as a whole.

10. A cultivation trough according to claim 9, characterized in that: A connector is provided between two adjacent cultivation trough bodies, the cross-sectional shape of the connector matches the cross-sectional shape of the cultivation trough body, and the two adjacent cultivation trough bodies can be respectively inserted into the inner sides of both ends of the connector to achieve connection.

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