CN108534858B - Differential triggering type accurate irrigation water metering device - Google Patents
Differential triggering type accurate irrigation water metering device Download PDFInfo
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- CN108534858B CN108534858B CN201810323671.XA CN201810323671A CN108534858B CN 108534858 B CN108534858 B CN 108534858B CN 201810323671 A CN201810323671 A CN 201810323671A CN 108534858 B CN108534858 B CN 108534858B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/10—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation
- G01F11/26—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation wherein the measuring chamber is filled and emptied by tilting or inverting the supply vessel, e.g. bottle-emptying apparatus
- G01F11/262—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation wherein the measuring chamber is filled and emptied by tilting or inverting the supply vessel, e.g. bottle-emptying apparatus for liquid or semi-liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/10—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation
- G01F11/26—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation wherein the measuring chamber is filled and emptied by tilting or inverting the supply vessel, e.g. bottle-emptying apparatus
- G01F11/267—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation wherein the measuring chamber is filled and emptied by tilting or inverting the supply vessel, e.g. bottle-emptying apparatus with counters for counting the numbers of measures delivered
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Abstract
The invention discloses a differential triggering type accurate irrigation water quantity metering device.A lifting control device is fixedly arranged on an outer box, and the lower end of the lifting control device extends into the outer box and is fixedly connected with the top of an inner box; the upper end or the middle end of the water inlet side of the inner box and the water inlet side of the outer box are provided with a first water inlet and a second water inlet which are matched with each other, and the lower end of the water outlet side of the inner box and the lower end of the water outlet side of the outer box are provided with a first water outlet and a second water outlet which are matched with each other; the lifting control device lifts the inner box upwards, the first water inlet and the second water inlet are at least partially overlapped, water in the ditch protection slope enters the inner box, when the water amount in the inner box is gradually increased, the inner box descends to enter a water outlet state when the gravity of the inner box exceeds descending resistance, the first water outlet and the second water outlet are at least partially overlapped, and water in the inner box flows into a farmland. The invention calculates the total water passing amount by accumulating the single water passing amount and the lifting times of the water tank, accurately measures the water consumption for field irrigation, and realizes the improvement of the utilization efficiency of water resources and the intelligent control of the irrigation water amount.
Description
Technical Field
The invention relates to a differential triggering type accurate irrigation water metering device, and belongs to the technical field of irrigation water metering devices.
Background
In the current society, agricultural water is a large consumer of water resource consumption, and the construction of agricultural water-saving projects in various regions has achieved certain effect in recent years. However, agricultural irrigation is still generally in a coarse and low-efficiency utilization form at present, which increases the shortage degree of water resources to a certain extent. Practice proves that the construction of agricultural water metering facilities and the metering, charging and controlling of agricultural water are important measures for agricultural sustainable development and the important part of water-saving social construction. However, due to the long-standing traditional concept of agricultural water in China, the field irrigation water metering devices are few, even if the field irrigation water metering devices are installed in main channels, the irrigation water consumption of independent fields is not metered basically, water fees are generally spread according to the number of households after irrigation is finished, the phenomena of poor water-saving awareness, vigorous flood irrigation, water resource waste and the like of farmers are serious, and great difficulty is brought to control and management of agricultural water resources. As an important component of irrigation area water, field irrigation water is a powerful measure for saving water resources and increasing irrigation efficiency, and is also an important means for implementing planned water use, accurate water distribution and irrigation.
The measurement of irrigation water volume is a basic and key technology, and the traditional water volume measuring devices such as a Parshall measuring tank, a U-shaped measuring tank and the like are only suitable for measuring the large water volume of a main canal, a ditch and the like and are used for measuring the water delivery of an open canal in a surface water irrigation area, but the measurement precision of the devices is generally not high. Although some large-scale precise flow devices, such as ultrasonic flow meters and infrared flow meters, have high measurement accuracy, they have high investment cost, complex installation and high maintenance cost, and thus, the burden of farmers is increased. Aiming at the characteristics and the accurate irrigation target of agricultural farmland irrigation in China at present, a field irrigation water metering device with simple structure, low cost and high metering accuracy is urgently needed, and is used for accurately metering the irrigation water of independent fields, so that conditions are created for rated management and reasonable allocation of irrigation water, and the agricultural water-saving irrigation management level in China is improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a differential triggering type accurate irrigation water quantity metering device, which adopts a cam limiting mechanism to realize the discrete metering of continuous water flow, has the advantages of simple structure and accurate metering, can be used for accurately metering and automatically controlling the water quantity for field irrigation and is beneficial to realizing the utilization efficiency of water resources and the intelligent control of the irrigation water quantity.
In order to achieve the purpose, the invention provides a differential force triggering type accurate irrigation water quantity metering device which comprises an outer box, an inner box, a lifting control device and a metering system, wherein the lifting control device is used for driving the inner box to lift; the upper end of the lifting control device is fixedly arranged on the outer box, the lower end of the lifting control device extends into the outer box and is fixedly connected with the top of the inner box, and the metering system is electrically connected with the lifting control device; the upper end or the middle end of the water inlet side of the inner box is provided with a first water inlet, the lower end of the water outlet side of the inner box is provided with a first water outlet, the water inlet side of the outer box is provided with a second water inlet matched with the first water inlet, and the lower end of the water outlet side of the outer box is provided with a second water outlet matched with the first water outlet; lifting control device during the state of intaking draws to last lifting the inner box, water inlet one and two at least partial coincidences of water inlet and delivery port one stagger completely with delivery port two and make delivery port one close completely, and the water in the irrigation canals and ditches bank protection gets into in the inner box, work as the water yield in the inner box is crescent messenger gradually when the gravity of inner box surpasses down resistance, the inner box is gone into out the water state down, and delivery port one and two at least partial coincidences of delivery port and water inlet one stagger completely with water inlet two and make water inlet one close completely this moment, rivers in the inner box go into in the farmland.
Preferably, the lifting control device comprises a lifting control rod, a lifting control spring and a tension adjusting nut used for adjusting the elasticity of the lifting control spring, the tension adjusting nut is in threaded connection with the top end of the lifting control rod, the lifting control spring is sleeved at the middle end of the lifting control rod, the inner diameter of the lifting control spring is smaller than the length of the diagonal of the tension adjusting nut, the lifting control spring is located above the outer box, and the bottom end of the lifting control rod penetrates through the top wall of the outer box and extends into the outer box to be fixedly connected with the top of the inner box.
Preferably, the lifting control rod comprises a control rod, the control rod comprises a threaded section positioned on the upper side and a straight guide rail section positioned on the lower side, the lifting control spring is in threaded connection with the threaded section, the middle end of the straight guide rail section bulges towards the left side and the right side to form a cam, and guide grooves are formed in the upper end and the lower end of the straight guide rail section and two sides of the cam; the depth of the guide groove is 5-8 mm.
Preferably, the lifting control device further comprises two transverse limiting mechanisms, the two transverse limiting mechanisms are symmetrically arranged on two sides of the lifting control rod, the transverse limiting mechanism comprises an ejector rod, an ejector rod bracket, a roller, a balance spring and a balance adjusting nut for adjusting the elasticity of the balance spring, the upper end of the ejector rod bracket is fixedly arranged on the inner top wall of the outer box, the outer end of the ejector rod penetrates through the ejector rod bracket, the inner end of the ejector rod is provided with a groove matched with the roller wheel, the roller wheel is rotationally connected with the groove, the rollers are respectively propped against one guide groove, the middle end of the ejector rod is in threaded connection with one balance adjusting nut, the balance spring is sleeved on the ejector rod and positioned between the ejector rod support and the balance adjusting nut, and the diagonal length of the balance adjusting nut is greater than the inner diameter of the balance spring; the gyro wheel is the rubber material, gyro wheel thickness is less than guide way width 0.5~1 mm.
Preferably, the lifting control rod comprises a control rod, the control rod comprises a threaded section positioned on the upper side and a straight guide rail section positioned on the lower side, the lifting control spring is in threaded connection with the threaded section, the middle end of the straight guide rail section bulges outwards along the circumferential direction by taking the axis of the control rod as a base point to form a sphere, and a plurality of guide grooves are formed in the sphere; the depth of the guide groove is 5-8 mm.
Preferably, the lifting control device further comprises a plurality of transverse limiting mechanisms which are distributed at equal intervals along the circumferential direction by taking the axis of the lifting control rod as a central line, the transverse limiting mechanism comprises an ejector rod, an ejector rod bracket, a roller, a balance spring and a balance adjusting nut for adjusting the elasticity of the balance spring, the upper end of the ejector rod bracket is fixedly arranged on the inner top wall of the outer box, the outer end of the ejector rod penetrates through the ejector rod bracket, the inner end of the ejector rod is provided with a groove matched with the roller wheel, the roller wheel is rotationally connected with the groove, the rollers are respectively propped against one guide groove, the middle end of the ejector rod is in threaded connection with one balance adjusting nut, the balance spring is sleeved on the ejector rod and positioned between the ejector rod support and the balance adjusting nut, and the diagonal length of the balance adjusting nut is greater than the inner diameter of the balance spring; the gyro wheel is the rubber material, gyro wheel thickness is less than guide way width 0.5~1 mm.
Preferably, the lifting control rod comprises a flange seat, the top end of the control rod is provided with an external thread matched with the tension adjusting nut, and the lower end of the control rod is fixedly connected with the top of the inner box through the flange seat; the lifting control rod is made of stainless steel.
Preferentially, the metering system comprises a battery, a support, a travel switch and a pulse counter, the travel switch is fixed to the top of the lifting control rod through the L-shaped support, the pulse counter is fixed to the top of the outer box and electrically connected with the travel switch, and the battery supplies power to the travel switch and the pulse counter.
Preferentially, the water inlet baffle plate and the water outlet baffle plate are included, the outer box is a cuboid hollow box body, the upper portion of the left side wall of the outer box is provided with an opening, the lower portion of the left side wall of the outer box is fixedly connected with the water inlet baffle plate, and the upper edge of the water inlet baffle plate is 10-20 cm higher than the bottom (15) of the canal; the middle part of the right side wall of the outer box is fixedly connected with the water outlet baffle, a second water outlet is formed in the upper part and the lower part of the right side wall of the outer box, a limiting hole for mounting the control rod is further formed in the center of the top plate of the outer box, and the outer box is mounted in a ditch protection slope on one side, close to a farmland, of an irrigation channel; the inner box is a cuboid hollow box body, a water inlet I is formed in the middle of the left side wall of the inner box, a water outlet I is formed in the lower portion of the right side wall of the inner box, an exhaust hole for exhausting air is formed in the top of the inner box, and the length and the width of the outer portion of the inner box are equal to those of the inner portion of the outer box.
Preferentially, the ejector rod support is U-shaped, the tops of two ends of the ejector rod support are both provided with flanges, the screws penetrate through the flanges and are fixedly connected with the top wall of the outer container, through holes used for containing the ejector rods are symmetrically formed in the side wall of the ejector rod support, and the diameter of each through hole is larger than the diameter of each ejector rod by 0.5-1 mm.
The invention achieves the following beneficial effects:
1) the invention adopts a sectional intermittent metering method, calculates the total excess water by accumulating the single excess water and the lifting times of the water tank, has higher metering precision than that of a common continuous metering device, can be used for accurately metering and automatically controlling the field irrigation water consumption, and is beneficial to realizing the utilization efficiency of water resources and the intelligent control of the irrigation water quantity.
2) The cam limiting mechanism is adopted to realize the automatic lifting and water feeding and discharging operations of the inner box, the triggering action is rapid, and the single water passing stability is high. Meanwhile, the water passing amount of a single time can be adjusted to meet different water passing amount requirements.
3) The intermittent water passing mode can effectively stabilize the water level height in the ditch, can not cause obvious water level fluctuation at the upstream and the downstream of the ditch when being used in a large quantity in the same ditch, and has strong adaptability.
4) This device adopts the interior outer case to cross the water structure, is difficult for receiving the influence of impurity such as silt that the irrigation water carried, and the baffle of intaking that simultaneously the side set up of intaking can effectually block irrigation canals and ditches bottom silt and get into, has guaranteed the long-term steady operation of device, has better non-maintaining nature.
5) The invention has simple structure, low manufacturing and maintenance cost and better portability, is suitable for long-term operation management of water consumption for field irrigation and temporary water metering control, and has better adaptability.
Drawings
FIG. 1 is a sectional view of the present invention in the water feed state;
FIG. 2 is a sectional view showing the drainage state of the present invention;
FIG. 3 is a right side view of the invention in the water intake state;
FIG. 4 is a perspective view of a lift control lever according to a first embodiment of the present invention;
FIG. 5 is a structural view of a slide jack apparatus according to the present invention;
FIG. 6 is a view showing the structure of the water outlet side of the outer case in the present invention;
FIG. 7 is a view showing the structure of the water inlet side of the outer case in the present invention;
FIG. 8 is a view showing the structure of the water outlet side of the inner tank in the present invention;
FIG. 9 is a structural view of the water inlet side of the inner tank in the present invention.
In the figure, 1 is a water surface, 2 is an outer box, 3 is a pulse counter, 4 is a lifting control rod, 5 is a tension adjusting nut, 6 is a support, 7 is a travel switch, 8 is a lifting control spring, 9 is a push rod support, 10 is a push rod, 11 is a roller, 12 is a balance spring, 13 is an inner box, 14 is a farmland, 15 is a canal bottom, 16 is a canal protection slope, 17 is a flange seat, 18 is a cam, 19 is a straight guide rail, 20 is a thread, 21 is a balance adjusting nut, 22 is a water outlet baffle, 23 is a water inlet baffle, 24 is a limiting hole, 25 is a guide groove, and 26 is an exhaust hole.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
A differential triggering type accurate irrigation water quantity metering device comprises an outer box 2, an inner box 13, a lifting control device and a metering system, wherein the lifting control device and the metering system are used for driving the inner box 13 to lift, the outer box 2 is installed in a ditch slope protection 16 and separates the ditch slope protection 16 from a farmland, and the inner box 13 capable of lifting is installed inside the outer box 2; the upper end of the lifting control device is fixedly arranged on the outer box 2, the lower end of the lifting control device extends into the outer box 2 and is fixedly connected with the top of the inner box 13, and the metering system is electrically connected with the lifting control device; the upper end or the middle end of the water inlet side of the inner box 13 is provided with a first water inlet, the lower end of the water outlet side of the inner box 13 is provided with a first water outlet, the water inlet side of the outer box 2 is provided with a second water inlet matched with the first water inlet, and the lower end of the water outlet side of the outer box 2 is provided with a second water outlet matched with the first water outlet; lifting control device during the state of intaking draws interior case 13, water inlet one and two at least partial coincidences of water inlet and delivery port one stagger completely with two delivery ports and make delivery port one close completely, and the water among the irrigation canals and ditches bank protection 16 gets into in interior case 13, work as the water yield in interior case 13 increases gradually makes when interior case 13's gravity surpasses down resistance, interior case 13 gets into out the water state down, and delivery port one and two at least partial coincidences of delivery port and water inlet one stagger completely with two water inlets and make water inlet one close completely this moment, rivers in interior case 13 go into in farmland 14.
Further, the lifting control device comprises a lifting control rod 4, a lifting control spring 8 and a tension adjusting nut 5 used for adjusting the elasticity of the lifting control spring 8, the tension adjusting nut 5 is in threaded connection with the top end of the lifting control rod 4, the lifting control spring 8 is sleeved at the middle end of the lifting control rod 4, the inner diameter of the lifting control spring 8 is smaller than the diagonal length of the tension adjusting nut 5, the lifting control spring 8 is located above the outer box 2, and the bottom end of the lifting control rod 4 penetrates through the top wall of the outer box 2 and extends into the outer box 2 to be fixedly connected with the top of the inner box 13.
Further, the lifting control rod 4 comprises a control rod, the control rod comprises a threaded section positioned on the upper side and a straight guide rail section 19 positioned on the lower side, the lifting control spring 8 is in threaded connection with the threaded section, the middle end of the straight guide rail section 19 bulges towards the left side and the right side to form a cam 18, and guide grooves 25 are formed in the upper end and the lower end of the straight guide rail section 19 and two sides of the cam 18; the depth of the guide groove 25 is 5-8 mm.
Further, the lifting control device further comprises two transverse limiting mechanisms, the two transverse limiting mechanisms are symmetrically arranged on two sides of the lifting control rod 4, each transverse limiting mechanism comprises an ejector rod 10, an ejector rod support 9, a roller 11, a balance spring 12 and a balance adjusting nut 21 used for adjusting the elasticity of the balance spring 12, the upper end of the ejector rod support 9 is fixedly arranged on the inner top wall of the outer box 2, the outer end of the ejector rod 10 penetrates through the ejector rod support 9, a groove matched with the roller 11 is formed in the inner end of the ejector rod 10, the roller 11 is rotatably connected with the groove, the roller 11 is respectively abutted against one guide groove 25, the middle end of the ejector rod 10 is in threaded connection with one balance adjusting nut 21, the balance spring 12 is sleeved on the ejector rod 10, and the balance spring 12 is located on the ejector rod support 9, Between the balance adjusting nuts 21, the diagonal length of the balance adjusting nuts 21 is greater than the inner diameter of the balance spring 12; the roller 11 is made of rubber, and the thickness of the roller 11 is smaller than the width of the guide groove 25 by 0.5-1 mm.
Furthermore, the lifting control rod 4 comprises a flange seat 17, the top end of the control rod is provided with an external thread matched with the tension adjusting nut 5, and the lower end of the control rod is fixedly connected with the top of the inner box 13 through the flange seat 17; the lifting control rod 4 is made of stainless steel.
Further, the metering system includes battery, support 6, travel switch 7, pulse counter 3, travel switch 7 is fixed in through L shape support 6 the top of 4 lifting control poles, pulse counter 3 is fixed in the top of outer container 2, pulse counter 3 is connected with travel switch 7 electricity, the battery is for travel switch 7, pulse counter 3 supplies power, the pulse counter model: GW 636-1-12-11-1-1.
Further, the water inlet baffle 23 and the water outlet baffle 22 are included, the outer box 2 is a cuboid hollow box body, the upper portion of the left side wall of the outer box 2 is open, the lower portion of the left side wall of the outer box 2 is fixedly connected with the water inlet baffle 23, and the upper edge of the water inlet baffle 23 is 1510-20 cm higher than the bottom of the channel; the middle part of the right side wall of the outer box 2 is fixedly connected with the water outlet baffle 22, the upper part and the lower part of the right side wall of the outer box 2 are provided with a second water outlet, the center of the top plate of the outer box 2 is also provided with a limiting hole 24 for installing the control rod, and the outer box 2 is arranged in a ditch protection slope 16 at one side of an irrigation channel close to a farmland 14; inner box 13 adopts the PVC board amalgamation to form, inner box 13 is a cuboid cavity box, inner box 13 left side wall middle part is seted up water inlet one, inner box 13 right side wall lower part is seted up outlet one, and the exhaust hole 26 that is used for carminative is seted up at the top, the length and width of inner box 13 outside equals with the length and width of outer container 2 inside.
Furthermore, the ejector rod support 9 is U-shaped, the tops of two ends of the ejector rod support 9 are both provided with flanges, a plurality of screws penetrate through the flanges and are fixedly connected with the top wall of the outer box 2, through holes used for containing the ejector rods 10 are symmetrically formed in the side wall of the ejector rod support 9, and the diameter of each through hole is larger than that of each ejector rod 10 by 0.5-1 mm.
The working principle of the invention is as follows:
when the inner box 13 is in the upper position, the opening on the left side of the inner box 13 is located above the water inlet baffle 23 of the outer box 2, water in the ditch can flow into the inner box 13, and air in the inner box 13 is discharged through the top exhaust hole 26, so that water can smoothly enter the box body. At this time, the cam 18 is located above the jack 10, the roller 11 at the end of the jack 10 presses the lift control lever by the balance spring 12 to restrict the cam 18 from moving downward, and the inner box 13 is always kept in the upper state by the combined action of the elastic force of the lift control spring 8 and the downward resistance of the jack 10 to the cam 18.
The weight of the inner box 13 is increased along with the continuous entering of water, when the water amount in the inner box 13 reaches a certain weight, and the total weight of the inner box 13 reaches and exceeds the sum of the elastic force of the lifting control spring 8 and the downward resistance of the ejector rod 10 to the cam 18, the inner box 13 drives the lifting control rod 4 to move downwards under the action of gravity, the cam 18 pushes the ejector rod 10 to the two sides, the roller 11 at the end part of the ejector rod 10 rolls along the guide groove 25 of the lifting control rod 4, and the cam 18 passes over the ejector rod 10 and stays below the ejector rod 10. The travel switch 7 moves downwards along with the lifting control rod 4 to detect the top of the outer box 2, and the pulse counter 3 counts and accumulates after receiving pulse signals of the travel switch 7. At this time, the left opening of the inner box 13 is lower than the water inlet baffle 23 of the outer box 2, and water in the ditch can not enter the box. Meanwhile, the opening at the bottom of the right side of the inner box 13 coincides with the opening at the bottom of the right side of the outer box 2, water in the inner box 13 can flow into the farmland 14 from the box body quickly, and outside air enters the inner box 13 through the exhaust holes 26 at the top of the inner box 13 to keep the internal and external pressure balance of the box body, so that water drainage is smooth. During drainage, the cam 18 is positioned below the push rods 10, and the push rods 10 on both sides press the lifting control rod and limit the upward movement of the cam 18, so that the inner tank 13 is always kept in a lower state during drainage.
After the water in the inner box 13 is discharged quickly, the weight of the inner box 13 is smaller than the sum of the elastic force of the lifting control spring 8 and the upward resistance of the ejector rod 10 to the cam 18, the cam 18 pushes the ejector rod 10 to the two sides again under the action of the elastic force of the lifting control spring 8, the roller 11 at the end part of the ejector rod 10 rolls along the guide groove 25 of the lifting control rod 4, the cam 18 passes over the ejector rod 10 and returns to the upper part of the ejector rod 10, and the device returns to the initial water inlet state again, so that the water passing metering process is completed.
In the long-term use process, the single water discharge of the device needs to be regularly calibrated so as to reduce the precision error caused by the looseness of the spring and the abrasion of the roller. The elastic force of the lifting control spring 8 can be changed by adjusting the position of the tension adjusting nut 5, so that the single water passing amount is changed. By adjusting the position of the balance adjusting nut 21, the pressing force of the jack 10 on the lift control rod 4 can be changed. The pressing force of the rams 10 on both sides should be uniform to reduce the moving resistance of the inner case 13.
Example two
Different from the first embodiment, in the present embodiment, the lifting control rod 4 includes a control rod, the control rod includes a threaded section located on the upper side and a straight guide rail section 19 located on the lower side, the lifting control spring 8 is in threaded connection with the threaded section, the middle end of the straight guide rail section 19 bulges outwards along the circumferential direction with the axis of the control rod as a base point to form a sphere, and the sphere is provided with a plurality of guide grooves 25; the depth of the guide groove 25 is 5-8 mm.
Further, the lifting control device further comprises a plurality of transverse limiting mechanisms, the plurality of transverse limiting mechanisms are distributed at equal intervals along the circumferential direction by taking the axis of the lifting control rod 4 as a central line, each transverse limiting mechanism comprises an ejector rod 10, an ejector rod support 9, a roller 11, a balance spring 12 and a balance adjusting nut 21 used for adjusting the elasticity of the balance spring 12, the upper end of the ejector rod support 9 is fixedly arranged on the inner top wall of the outer box 2, the outer end of the ejector rod 10 penetrates through the ejector rod support 9, a groove matched with the roller 11 is formed in the inner end of the ejector rod 10, the roller 11 is rotatably connected with the groove, the roller 11 is respectively abutted against one guide groove 25, the balance adjusting nut 21 is connected to the middle end of the ejector rod 10 in a threaded manner, the balance spring 12 is sleeved on the ejector rod 10, and the balance spring 12 is located on the ejector rod support 9, Between the balance adjusting nuts 21, the diagonal length of the balance adjusting nuts 21 is greater than the inner diameter of the balance spring 12; the roller 11 is made of rubber, and the thickness of the roller 11 is smaller than the width of the guide groove 25 by 0.5-1 mm.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The differential triggering type accurate irrigation water quantity metering device is characterized by comprising an outer box (2), an inner box (13), a lifting control device and a metering system, wherein the lifting control device and the metering system are used for driving the inner box (13) to lift, the outer box (2) is installed in a ditch slope protection (16) and separates the ditch slope protection (16) from a farmland, and the inner box (13) capable of lifting is installed inside the outer box (2); the upper end of the lifting control device is fixedly arranged on the outer box (2), and the lower end of the lifting control device extends into the outer box (2) and is fixedly connected with the top of the inner box (13); the upper end or the middle end of the water inlet side of the inner box (13) is provided with a first water inlet, the lower end of the water outlet side of the inner box (13) is provided with a first water outlet, the water inlet side of the outer box (2) is provided with a second water inlet matched with the first water inlet, and the lower end of the water outlet side of the outer box (2) is provided with a second water outlet matched with the first water outlet; when the water enters the water inlet state, the lifting control device lifts the inner box (13) upwards, the water inlet I and the water inlet II are at least partially overlapped, the water outlet I and the water outlet II are completely staggered, so that the water outlet I is completely closed, water in the ditch protection slope (16) enters the inner box (13), when the water quantity in the inner box (13) is gradually increased, so that the gravity of the inner box (13) exceeds the descending resistance, the inner box (13) descends to enter the water outlet state, at the moment, the water outlet I and the water outlet II are at least partially overlapped, the water inlet I and the water inlet II are completely staggered, so that the water inlet I is completely closed, and the water in the inner box (13) flows into a farmland (14);
the lifting control device comprises a lifting control rod (4), a lifting control spring (8) and a tension adjusting nut (5) used for adjusting the elasticity of the lifting control spring (8), the tension adjusting nut (5) is in threaded connection with the top end of the lifting control rod (4), the lifting control spring (8) is sleeved at the middle end of the lifting control rod (4), the inner diameter of the lifting control spring (8) is smaller than the length of the diagonal of the tension adjusting nut (5), the lifting control spring (8) is positioned above the outer box (2), and the bottom end of the lifting control rod (4) penetrates through the top wall of the outer box (2) and extends into the outer box (2) to be fixedly connected with the top of the inner box (13);
the lifting control rod (4) comprises a control rod, the control rod comprises a threaded section positioned on the upper side and a straight guide rail section (19) positioned on the lower side, the lifting control spring (8) is in threaded connection with the threaded section, the middle end of the straight guide rail section (19) bulges towards the left side and the right side to form a cam (18), and guide grooves (25) are formed in the upper end and the lower end of the straight guide rail section (19) and the two sides of the cam (18);
the lifting control device further comprises two transverse limiting mechanisms, the two transverse limiting mechanisms are symmetrically arranged on two sides of the lifting control rod (4), each transverse limiting mechanism comprises an ejector rod (10), an ejector rod support (9), a roller (11), a balance spring (12) and a balance adjusting nut (21) used for adjusting the elasticity of the balance spring (12), the upper end of the ejector rod support (9) is fixedly arranged on the inner top wall of the outer box (2), the outer end of the ejector rod (10) penetrates through the ejector rod support (9), a groove matched with the roller (11) is formed in the inner end of the ejector rod (10), the roller (11) is rotatably connected with the groove, the roller (11) is uniformly supported in a guide groove (25), the middle end of the ejector rod (10) is in threaded connection with the balance adjusting nut (21), and the balance spring (12) is sleeved on the ejector rod (10), the balance spring (12) is positioned between the ejector rod bracket (9) and the balance adjusting nut (21).
2. A differential triggering type precision irrigation water metering device according to claim 1, characterized in that the depth of the guide groove (25) is 5-8 mm.
3. The differential triggering type precise irrigation water metering device according to claim 1, wherein the diagonal length of the balance adjusting nut (21) is greater than the inner diameter of the balance spring (12), the roller (11) is made of rubber, and the thickness of the roller (11) is less than the width of the guide groove (25) by 0.5-1 mm.
4. The differential triggering type precise irrigation water metering device is characterized in that the lifting control rod (4) comprises a control rod, the control rod comprises a threaded section on the upper side and a straight guide rail section (19) on the lower side, the lifting control spring (8) is in threaded connection with the threaded section, the middle end of the straight guide rail section (19) bulges outwards in the circumferential direction by taking the axis of the control rod as a base point to form a sphere, and a plurality of guide grooves (25) are formed in the sphere; the depth of the guide groove (25) is 5-8 mm.
5. The differential triggering type accurate irrigation water metering device according to claim 4, characterized in that the lifting control device further comprises a plurality of transverse limiting mechanisms, the plurality of transverse limiting mechanisms are distributed at equal intervals along the circumferential direction by taking the axis of the lifting control rod (4) as the center line, each transverse limiting mechanism comprises a push rod (10), a push rod bracket (9), a roller (11), a balance spring (12) and a balance adjusting nut (21) for adjusting the elasticity of the balance spring (12), the upper end of the push rod bracket (9) is fixedly arranged on the inner top wall of the outer box (2), the outer end of the push rod (10) penetrates through the push rod bracket (9), a groove matched with the roller (11) is formed in the inner end of the push rod (10), the roller (11) is rotatably connected with the groove, the rollers (11) are respectively abutted against one guide groove (25), the middle end of the ejector rod (10) is in threaded connection with the balance adjusting nut (21), the balance spring (12) is sleeved on the ejector rod (10), the balance spring (12) is located between the ejector rod support (9) and the balance adjusting nut (21), and the diagonal length of the balance adjusting nut (21) is larger than the inner diameter of the balance spring (12); the roller (11) is made of rubber, and the thickness of the roller (11) is smaller than the width of the guide groove (25) by 0.5-1 mm.
6. A differential triggering type accurate irrigation water metering device according to claim 4, characterized in that the lifting control rod (4) comprises a flange seat (17), the top end of the control rod is provided with an external thread matched with the tension adjusting nut (5), and the lower end of the control rod is fixedly connected with the top of the inner box (13) through the flange seat (17); the lifting control rod (4) is made of stainless steel.
7. The differential triggering type precise irrigation water metering device is characterized in that the metering system comprises a battery, a support (6), a travel switch (7) and a pulse counter (3), the travel switch (7) is fixed to the top of the lifting control rod (4) through the L-shaped support (6), the pulse counter (3) is fixed to the top of the outer box (2), the pulse counter (3) is electrically connected with the travel switch (7), and the battery supplies power to the travel switch (7) and the pulse counter (3).
8. The differential triggering type accurate irrigation water quantity metering device is characterized by comprising a water inlet baffle plate (23) and a water outlet baffle plate (22), wherein the outer box (2) is a cuboid hollow box body, the upper portion of the left side wall of the outer box (2) is opened, the lower portion of the left side wall of the outer box (2) is fixedly connected with the water inlet baffle plate (23), and the upper edge of the water inlet baffle plate (23) is 10-20 cm higher than the bottom of a channel (15); the middle part of the right side wall of the outer box (2) is fixedly connected with the water outlet baffle (22), the upper part and the lower part of the right side wall of the outer box (2) are provided with a second water outlet, the center of the top plate of the outer box (2) is also provided with a limiting hole (24) for mounting the control rod, and the outer box (2) is arranged in a ditch protection slope 16 at one side of an irrigation channel close to a farmland (14); the inner box (13) is a cuboid hollow box body, a water inlet I is formed in the middle of the left side wall of the inner box (13), a water outlet I is formed in the lower portion of the right side wall of the inner box (13), an exhaust hole (26) for exhausting is formed in the top of the inner box, and the length and the width of the outer portion of the inner box (13) are equal to those of the inner portion of the outer box (2).
9. A differential triggering type accurate irrigation water metering device according to claim 3 or 5, characterized in that the ejector rod support (9) is U-shaped, the tops of both ends of the ejector rod support (9) are provided with flanges, a plurality of screws penetrate through the flanges and are fixedly connected with the top wall of the outer box (2), through holes for accommodating the ejector rods (10) are symmetrically formed in the side wall of the ejector rod support (9), and the diameter of each through hole is larger than the diameter of each ejector rod (10) by 0.5-1 mm.
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| CN104881051A (en) * | 2015-06-18 | 2015-09-02 | 河海大学 | Self-elevating irrigation water volume accurate metering and control device |
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