CN214121319U - Double-layer protection device of sensor and device for measuring rice field evapotranspiration amount - Google Patents

Abstract

The utility model relates to a double-deck protection device of sensor, including outer sleeve pipe and inlayer sleeve pipe. The outer layer sleeve pipe comprises a sealing section, a communicating section and a heightening section from bottom to top, and the inner layer sleeve pipe is fixed in the outer layer sleeve pipe. The inner layer sleeve comprises a first pipe body, a second pipe body and a third pipe body from bottom to top. The side wall and the bottom wall of the sealing section are sealed and are integrally placed below the mud surface of the paddy field. The communicating hole is formed in the communicating section, the heightening section is higher than the highest water level, the pipe wall and the bottom wall of the first pipe body are sealed, and the micropores are formed in the second pipe body and communicated with the communicating hole. The utility model has the advantages that: through outer sleeve pipe and the sheathed tube double-deck filtration of inlayer, outer sleeve pipe prevents weeds, thick silt to get into effectively, carries out the fine filtration through the inlayer sleeve pipe, prevents finer silt particle to get into, avoids slight silt to influence the measurement accuracy of depth of water sensor.

Description

Double-layer protection device of sensor and device for measuring rice field evapotranspiration amount

Technical Field

The utility model belongs to agricultural water demand test equipment field, concretely relates to double-deck protection device of sensor and measure the device of paddy field evapotranspiration volume.

Background

The main representatives of paddy field crops, taking rice as an example, the first main grain crops in the rice ranks, and in recent ten years, the frequent seasonal drought in the rice planting areas in south China threatens rice production greatly. Modern agriculture needs to develop water-saving irrigation and fine irrigation, so that rice field evapotranspiration and accurate measurement become a fine irrigation foundation.

In the prior art, a rice field evapotranspiration measuring method has a large measuring error. Like the rice field evaporation seepage appearance of application number 200420036575.0, this rice field evaporation seepage appearance's a section of thick bamboo and rice field are relative isolation, in addition, need adopt the pipe to discharge the water in the section of thick bamboo that evaporates when its survey, consequently have great error in operation process.

With the development of modern electronic technology and observation instrument equipment, a new generation of water depth sensor becomes an important measuring instrument for rice field evapotranspiration by virtue of high precision and high automation degree. The water depth sensor can directly measure the rice field evapotranspiration amount by measuring the water depth water level change.

However, the environment of the rice field is complex, and factors such as silt, weeds, insects and wind in the rice field all affect the measurement accuracy of the water depth sensor. Therefore, how to directly install and apply the water depth sensor to the paddy field and prevent the influence of factors such as silt, weeds, insects, wind and the like in the paddy field is a problem which needs to be solved urgently. In order to solve the above problem, the utility model with patent number ZL 201822036104.4 proposes a protection device for a sensor, as shown in fig. 1, it protects the water depth sensor with a single-layer protection sleeve, prevents that small animals such as rice field small insects, field weeds and thicker silt from entering. However, the protective device cannot prevent fine silt from entering the casing, so that impurities in water can easily enter the casing. After a long time, silt is deposited in the casing pipe, and the measurement precision of the water depth sensor is influenced. Therefore, the protection of the water depth sensor must be enhanced to ensure the precision of water level measurement and the precision of rice field evapotranspiration.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In order to solve the problem that the protection device who exists can not prevent that slight silt from influencing depth of water sensor measurement accuracy, the utility model provides a double-deck protection device of sensor. Furthermore, the utility model also provides an adopt the device of aforementioned double-deck protection device's measurement paddy field evapotranspiration volume.

(II) technical scheme

In order to achieve the above object, the utility model discloses a main technical scheme include:

a double-layer protection device of a sensor is used for protecting a measuring element arranged in a paddy field and comprises an outer sleeve and an inner sleeve;

the outer casing comprises a sealing section, a communicating section and a heightening section which are arranged in sequence from bottom to top;

the inner casing is fixed in a vertical space formed by the sealing section, the communicating section and the heightening section; a water depth sensor is arranged at the bottom of the inner casing;

the inner-layer sleeve comprises a first pipe body, a second pipe body and a third pipe body which are sequentially connected from bottom to top;

the whole sealing section is arranged below the mud surface of the paddy field, and the joint of the sealing section and the communicating section is flush with the mud surface;

the side wall and the bottom wall of the sealing section are sealed;

the communicating section is provided with a communicating hole which is communicated with the vertical space;

the heightened section is higher than the highest water surface of the paddy field;

the pipe wall and the bottom wall of the first pipe body are sealed, and the side wall of the second pipe body is provided with micropores which are smaller than the communicating holes;

and the micropores on the side wall of the second pipe body are communicated with the communication holes.

Preferably, an annular supporting seat is arranged between the inner sleeve and the outer sleeve;

movable bayonets are arranged on the inner edge and the outer edge of the annular supporting seat, and clamping blocks are arranged on the inner wall of the outer-layer sleeve and the outer side wall of the inner-layer sleeve;

the clamping block is clamped with the movable bayonet, so that the annular supporting seat is fixed between the inner-layer sleeve and the outer-layer sleeve.

Preferably, a supporting base is arranged inside the outer sleeve and at the bottom of the inner sleeve.

Preferably, a filter screen is arranged at the communication hole;

the filter screen comprises a framework and a screen mesh;

the framework is riveted with the communicating hole, and the lower edge of the screen is flush with the mud surface.

Preferably, the second pipe body is welded with the first pipe body, and the second pipe body is in threaded connection or bayonet connection with the third pipe body;

the diameter of the micropores on the second pipe body is 5-10 mu m.

Preferably, the top of the third pipe body is higher than the top of the raised section.

Preferably, the third tube is an insect-proof cover with a top cover.

Preferably, a cable hole is formed at the top of the third pipe body.

The utility model also provides a device for measuring rice field evapotranspiration, which comprises the double-layer protection device, wherein the bottom of the inner-layer sleeve is provided with a water depth sensor;

the connecting cable of the water depth sensor penetrates out of a cable hole in the third pipe body, and the water depth sensor is in communication connection with an upper computer arranged at the far end outside the protection device through the connecting cable.

Preferably, the device for measuring rice field evapotranspiration further comprises an automatic rain gauge and an irrigation flow meter.

(III) advantageous effects

The utility model has the advantages that:

the utility model discloses a double-deck protection device, through outer sleeve pipe and the double-deck filtration of inlayer sheathed tube, outer sleeve pipe prevents weeds, thick silt to get into effectively, carries out the essence through the inlayer sleeve pipe and filters, prevents thinner silt particle to get into, avoids slight silt to influence depth of water sensor's measurement accuracy.

The utility model discloses a double-deck protection device of sensor makes outer sheathed tube vertical space and paddy field's water layer be linked together through outer sheathed tube intercommunicating pore, and the water level condition of outer sleeve pipe and paddy field is unanimous all the time. And the vertical space of the outer layer sleeve is communicated with the measuring space in the inner layer sleeve through the micropores on the inner layer sleeve, and the water level states of the vertical space in the inner layer sleeve and the vertical space in the outer layer sleeve are consistent all the time. The double-layer protection device is communicated with the inner-layer sleeve, the outer-layer sleeve and the rice field completely through the communicating holes of the communicating section and the micropores of the second pipe body, and therefore the water level change and the like in the measuring space are consistent with those in the paddy field. Outer sheathed tube sealed section can protect measuring space not influenced by paddy field earth, and intercommunication section downside border flushes with the mud face, guarantees that the water level in the measuring space changes unanimously in with the paddy field.

The utility model provides a device of measurement paddy field evapotranspiration volume under protection device's protection, directly arrange water level sensor in the rice field, through survey paddy field water level variation, obtain the paddy field evapotranspiration volume change, measure the environmental stability, the precision is high.

Drawings

FIG. 1 is a schematic diagram of a single-layer protection device according to the prior art;

fig. 2 is a schematic structural view of a middle double-layer protection device of the present invention;

FIG. 3 is a schematic structural view of the outer casing of the present invention;

FIG. 4 is a side expanded view of the middle communicating section of the present invention;

FIG. 5 is a cross-sectional top view of the middle communicating section of the present invention;

FIG. 6 is an enlarged view of the filter screen of the present invention;

FIG. 7 is an expanded view of the filter net of the present invention;

FIG. 8 is a schematic structural view of the middle-layer sleeve of the present invention;

fig. 9 is a top view of a third tube of the present invention;

fig. 10 is a side view of a third tube of the present invention;

fig. 11 is a side view of a second tube of the present invention;

FIG. 12 is a partial enlarged view of the microporous structure of the second tubular body according to the present invention;

fig. 13 is a schematic structural view of the middle annular supporting frame and the clamping block clamped with the annular supporting seat of the present invention;

fig. 14 is a schematic structural view of a support base according to the present invention;

fig. 15 is a schematic structural view of the middle sensor support seat of the present invention.

[ description of reference ]

1: a sealing section; 2: a communicating section; 21: a communicating hole; 3: a heightening section;

4: a first pipe body; 5: a second tube body; 6: a third tube; 7: a water depth sensor; 8: an annular supporting seat; 81: a movable bayonet; 82: a clamping block; 9: a support base; 10: a filter screen; 101: a framework; 102: screening a screen; 11: connecting a cable; 111: a cable hole; 12: sensor supporting seat.

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.

As shown in fig. 2 to 15, the present embodiment provides a double-layered protection device of a sensor for protecting a measuring element disposed in a paddy field, comprising an outer casing and an inner casing. The outer casing pipe comprises a sealing section 1, a communicating section 2 and a heightening section 3 which are arranged from bottom to top in sequence. The inner layer sleeve is fixed in a vertical space formed by the sealing section 1, the communicating section 2 and the heightening section 3; a water depth sensor 7 is arranged at the bottom of the inner casing. The inner layer sleeve comprises a first pipe body 4, a second pipe body 5 and a third pipe body 6 which are sequentially connected from bottom to top.

The lateral wall and the bottom wall of the sealing section 1 are sealed, the sealing section 1 is integrally arranged below the mud surface of the paddy field, and the joint of the sealing section 1 and the communicating section 2 is flush with the mud surface.

The communicating section 2 is provided with a communicating hole 21, and the communicating hole 21 is communicated with the vertical space.

The heightened section 3 is higher than the highest water surface of the paddy field.

The pipe wall and the bottom wall of the first pipe body 4 are sealed, and the side wall of the second pipe body 5 is provided with micropores.

The micropores on the side wall of the second tube 5 are communicated with the communication holes 21.

The outer sleeve may be a cylinder with an inner diameter of 300mm, a length of 900mm and a thickness of 10mm, which is made of PVC (polyvinyl chloride). The bottom end of the outer sleeve is sealed, the length of the sealing section 1 is 600mm, and the height of the communicating hole 21 is 150 mm. Specifically, the aperture size of the communicating hole is 100cm × 150mm to ensure that the inner part of the outer layer sleeve can be communicated with water in a paddy field, and the outer layer sleeve cannot be blocked.

As shown in fig. 3-5, the communicating section 2 is provided with four rectangular holes as communicating holes 21, pipe struts are arranged between the communicating holes 21, and the width of the pipe struts is 120-130 mm and are distributed evenly. In fig. 4, the lower boundaries of the four rectangular holes are flush, and the lower pipe section of the communication hole 21 is the sealing section 1. When in use, the sealing section 1 is integrally arranged in soil of a paddy field, and the upper surface of the soil layer is the soil surface and is also the bottom surface of the water layer.

The inner layer casing is vertically arranged in the outer layer casing, and a water level measuring space is arranged in the inner layer casing. The outer diameter range of the inner layer sleeve can be selected to be 150-200 mm, and 200mm is taken in the embodiment. The inner layer sleeve is 850mm high, 10mm thick and cylindrical, and is made of stainless steel. The bottom end of the inner casing is sealed, the length of the first pipe body 4 is 400mm, and the length of the second pipe body is 450 mm.

The double-layer protection device of the embodiment effectively prevents weeds and coarse silt from entering the outer-layer sleeve through double-layer filtering of the outer-layer sleeve and the inner-layer sleeve. Carry out the fine filtration through the inlayer sleeve pipe, prevent finer silt particle to get into, avoid slight silt to influence the measurement accuracy of depth of water sensor.

The double-deck protection device of sensor of this embodiment makes outer sheathed tube vertical space and the water layer in paddy field be linked together through outer sheathed tube intercommunicating pore 21, and the water level state of outer sleeve pipe and paddy field is unanimous all the time. The vertical space of the outer sleeve is communicated with the measuring space in the inner sleeve through the micropores in the second pipe body, and the water level states of the inner sleeve and the vertical space in the outer sleeve are consistent all the time. The double-layer protection device is completely communicated with the inner layer sleeve, the outer layer sleeve and the paddy field through the communicating hole 21 of the communicating section 2 and the micropores of the second pipe body 5, and the water level change and the like in the measuring space are consistent with those in the paddy field. Outer sheathed tube seal segment 1 can protect measuring space not influenced by paddy field earth, and 2 side border on the intercommunication section flushes with the mud face, guarantees that the water level in the measuring space changes unanimously in with the paddy field.

Preferably, an annular support seat 8 is provided between the inner and outer sleeves. Annular supporting seat 8 is annular lamellar for the relative outer sheathed tube position of fixed inlayer sleeve pipe avoids the inlayer sleeve pipe slope to rock in outer sleeve pipe.

As shown in fig. 13, the inner edge and the outer edge of the annular supporting seat 8 are uniformly provided with 4 movable bayonets 81, and the inner wall of the outer sleeve and the outer wall of the inner sleeve are provided with the fixture blocks 82 in a one-to-one correspondence manner. The outer diameter of the annular supporting frame 8 is 290mm and is slightly smaller than the diameter of the outer sleeve. The inner diameter of the annular support frame 8 is 200mm, slightly larger than the diameter of the inner casing, the depth of the inner movable bayonet of the annular support seat 8 is 3mm, and the width is 5 mm. The depth of the movable bayonet on the outer side of the annular supporting seat 8 is 5mm, and the width of the movable bayonet is 10 mm. The size of the clamping block corresponding to the inverted T shape is slightly smaller than that of the bayonet.

The clamping block 82 is clamped with the movable clamping opening 81 to prevent the flaky annular supporting seat 8 from sliding downwards in the outer sleeve, so that the annular supporting seat 8 is fixed between the inner sleeve and the outer sleeve.

Preferably, the number of the annular supporting seats 8 is not less than 3, and the annular supporting seats are uniformly distributed at the upper, middle and lower positions of the inner sleeve, and the distribution can be seen in fig. 8.

As shown in figures 3-5, the communication holes 21 have large openings and are distributed at intervals, so that water in the paddy field can flow into the outer sleeve 1 conveniently.

Preferably, as shown in fig. 6-7, a filter screen 10 is arranged at the communication hole 21, the filter screen comprises a framework 101 and a screen 102, the framework 101 is riveted or bolted with the communication hole 21, and the lower edge of the screen 102 is flush with the mud surface.

The frames 101 are arranged crosswise to form a lattice-like region, and a mesh 102 is provided in the lattice-like region formed by the frames 101. The screen 102 is made of stainless steel, and the mesh is preferably 60 to 80 mesh, or the aperture is selected to be 0.1 to 0.3 mm. The communicating hole 21 makes the vertical space in the outer layer casing and the water layer in the paddy field form a communicating vessel, and the water level states of the two are consistent all the time.

In order to ensure the normal use of the communicating vessel, the lower edge of the frame 101 is not higher than the communicating hole 21.

Preferably, second body 5 and first body 4 welding, second body 5 and third body 6 threaded connection or bayonet connection.

As shown in fig. 12, which is a structure view of the micropores enlarged by 10000 times in the second tube, the diameter of the micropores on the second tube 5 is 5 to 10 μm. The second tube body 5 is made of microporous stainless steel material, and has micropores with a pore size of 5-10 μm, which only allows water and fine molecules to pass through and is difficult for impurities such as silt to pass through. The micropores of the inner sleeve and the intercommunicating pores 21 of the outer sleeve enable the measuring space in the inner sleeve and the water layer of the paddy field to form a communicating vessel, and the water level states of the inner sleeve and the water layer are consistent all the time.

Preferably, the third tubular body 6 is an insect-proof cover covering the second tubular body 5, and the inner diameter of the insect-proof cover is consistent with that of the second tubular body, so that the third tubular body and the second tubular body can be clamped or screwed. The third pipe body 6 is an insect-proof cover with a top cover, bayonet threads can be arranged at the position of 0-50mm of the third pipe body, and the bayonet threads are connected with a screw clamping opening at the upper part of the second pipe body. A sealing gasket can be arranged between the second pipe body 5 and the third pipe body 6, so that a better protection effect is achieved. The top of the third pipe body 6 is higher than the top of the heightened section 3 so as to achieve better protection effect. The third tube 6 is provided with a cable hole 111 at the top for connecting the connection cable 11 with the water depth sensor in the inner casing. The cable hole 111 is also provided with a sealing plug to ensure that no impurities such as dust enter the measurement space of the inner casing.

Preferably, a support base 9 is arranged inside the outer sleeve and at the bottom of the inner sleeve. As shown in fig. 14, the support base 9 is in the form of a table body having a hollow skeleton structure, and the upper portion thereof is a support surface. The supporting base 9 is used for fixing the inner casing, the diameter of the upper end of the supporting base is 200mm, which is slightly larger than the diameter of the inner casing, and the diameter of the lower end of the supporting base is 290mm, which is slightly smaller than the diameter of the outer casing. The supporting base 9 is designed to be hollow, so that the incoming fine silt can sink conveniently. PVC or stainless steel are selected for use to the material of supporting base 9, and its height can set up to 50 ~ 100mm to reserve sufficient space for sediment deposit.

Preferably, as shown in fig. 15, in this embodiment, a sensor support base 12 is further disposed at the bottom of the inner casing for fixing the water depth sensor. The sensor support base 12 is cylindrical, and the top of the sensor support base is provided with a groove for placing a water depth sensor, and the position of the water depth sensor on the inner casing is fixed. The diameter of the sensor supporting seat 12 is 190mm and is slightly smaller than the inner sleeve. The sensor support base 12 may be set to be 100mm high to allow the water depth sensor to have a sensitive measurement space.

According to the principle of water depth sensor and farmland water balance, the evapotranspiration of paddy field is omega ═ E + T ═ delta W + P + I-R-D-H.

Wherein E is field evaporation capacity, T is crop transpiration capacity, delta W is field water level variation, P is precipitation capacity, R is runoff capacity, I is irrigation capacity, D is seepage capacity, and H is groundwater rise. The delta W is directly measured by a field evaporation water depth sensor, and the evapotranspiration is set to be positive, namely the delta W is more than or equal to 0; when the field water level rises, the delta W is less than or equal to 0; the default value is zeroed to 0. P, I, etc. are measured by an automatic rain gauge and irrigation flow meter, respectively.

D-leakage amount and H-groundwater rise are ignored. In the paddy field, the influence of R is small, and when excessive rainwater overflows the evapotranspiration barrel or the field, the evapotranspiration value of the automatic treatment area time interval is 0 when the water level rises. The evapotranspiration rate of the paddy field is equal to E + T, and is equal to delta W + P + I.

When the variation time span of P, I is not large, the period evapotranspiration can be approximated to be 0. Therefore, without considering the influence of precipitation, short irrigation period, runoff and leakage, the device can further increase the value of Ω ═ E + T ≈ Δ W.

According to the principle of measuring the rice field evapotranspiration, the embodiment also provides a device for measuring the rice field evapotranspiration, which comprises the double-layer protection device, the automatic rain gauge and the irrigation flowmeter. The bottom of the inner casing is provided with a water depth sensor 7. The water depth sensor 7 is used for measuring delta W, the automatic rain gauge is used for measuring precipitation P, and the irrigation flowmeter is used for measuring irrigation quantity I.

The connecting cable 11 of the water depth sensor 7 penetrates out of the cable hole 111 in the third pipe body 6, and the water depth sensor 7 is in communication connection with an upper computer arranged at the far end outside the protection device through the connecting cable 11.

And a plurality of groups of devices for measuring the evapotranspiration of the paddy field can be arranged to measure the evapotranspiration of the environmental groups in different paddy field water depths.

The above embodiments are only for explaining the present invention, and do not constitute the limitation of the protection scope of the present invention, and those skilled in the art can make various changes or modifications within the scope of the claims, all of which belong to the essence of the present invention.

Claims (10)

1. A double-layer protection device of a sensor is used for protecting a measuring element arranged in a paddy field and is characterized by comprising an outer sleeve and an inner sleeve;

the outer casing comprises a sealing section (1), a communicating section (2) and a heightening section (3) which are arranged from bottom to top in sequence;

the inner casing is fixed in a vertical space formed by the sealing section (1), the communicating section (2) and the heightening section (3); a water depth sensor (7) is arranged at the bottom of the inner casing;

the inner-layer sleeve comprises a first pipe body (4), a second pipe body (5) and a third pipe body (6) which are sequentially connected from bottom to top;

the sealing section (1) is integrally arranged below the mud surface of the paddy field, and the joint of the sealing section (1) and the communicating section (2) is flush with the mud surface;

the side wall and the bottom wall of the sealing section (1) are sealed;

the communicating section (2) is provided with a communicating hole (21), and the communicating hole (21) is communicated with the vertical space;

the heightened section (3) is higher than the highest water surface of the paddy field;

the pipe wall and the bottom wall of the first pipe body (4) are sealed, and the side wall of the second pipe body (5) is provided with micropores which are smaller than the communicating holes (21);

the micropores on the side wall of the second pipe body (5) are communicated with the communication holes (21).

2. Double-layered protection device according to claim 1, characterized in that an annular support seat (8) is provided between the inner and outer sleeves;

movable bayonets (81) are arranged on the inner edge and the outer edge of the annular supporting seat (8), and clamping blocks (82) are arranged on the inner wall of the outer-layer sleeve and the outer side wall of the inner-layer sleeve;

the clamping block is clamped with the movable bayonet, so that the annular supporting seat (8) is fixed between the inner-layer sleeve and the outer-layer sleeve.

3. Double-layered protection device according to claim 1, characterized in that a support base (9) is provided inside the outer sleeve, at the bottom of the inner sleeve.

4. Double-layered protection device according to claim 1, characterized in that a filter screen (10) is provided at the communication hole (21);

the filter screen comprises a framework (101) and a screen (102);

the framework (101) is riveted with the communicating hole (21), and the lower edge of the screen (102) is flush with the mud surface.

5. Double-layered protection device according to claim 1, characterized in that said second tubular body (5) is welded to said first tubular body (4), said second tubular body (5) being screwed or bayonet-connected to said third tubular body (6);

the diameter of the micropores on the second pipe body (5) is 5-10 mu m.

6. Double-layered protection device according to claim 1, characterized in that the top of said third tubular body (6) is higher than the top of said raised section (3).

7. Double-layered protection device according to claim 1, characterized in that said third tubular body (6) is an insect-proof cover with a top cover.

8. Double-layered protection device according to claim 1, characterized in that the top of said third pipe body is provided with cable holes (111).

9. An apparatus for measuring rice field evapotranspiration, comprising the double-layer protection apparatus according to any one of claims 1 to 8, wherein a water depth sensor (7) is provided at the bottom of the inner casing;

and a connecting cable (11) of the water depth sensor (7) penetrates out of a cable hole in the third pipe body, and the water depth sensor (7) is in communication connection with an upper computer arranged at the far end outside the protection device through the connecting cable (11).

10. The apparatus for measuring rice field evapotranspiration as set forth in claim 9, further comprising an automatic rain gauge and an irrigation flow meter.

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