CN214538082U - Chute type flowmeter - Google Patents
Chute type flowmeter Download PDFInfo
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- CN214538082U CN214538082U CN202121189480.2U CN202121189480U CN214538082U CN 214538082 U CN214538082 U CN 214538082U CN 202121189480 U CN202121189480 U CN 202121189480U CN 214538082 U CN214538082 U CN 214538082U
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Abstract
The utility model discloses a chute type flowmeter, the body of flowmeter are a box, and the upper portion of box inner chamber is equipped with the baffle box, and the exit of baffle box is provided with measures the spout, and the rear portion of measuring the spout is provided with the dynamometry pressure head, and the sub-unit connection of dynamometry pressure head has weighing sensor, and the dynamometry pressure head can be in real time carrying weighing sensor to the impact force of measuring the spout transmission, and the lower part both sides of measuring the spout are connected on the reed. The measuring method comprises the following steps: step one, calculating feeding timeSpeed v of any point and initial speed v of entering chute0(ii) a Secondly, sliding the solid bulk materials into a measuring chute from the material guide groove along the tangential direction; and step three, obtaining the quality of the material. Has the advantages that: the measuring time of the material is increased, and therefore the detection precision of the material flow is improved. Compared with most other measuring equipment, the volume is reduced, and the field installation is convenient.
Description
Technical Field
The utility model relates to a flowmeter, in particular to sliding chute formula flowmeter.
Background
At present, when a solid bulk loading vehicle is loaded, the loading amount cannot be accurately grasped because a driver and a carloader cannot dynamically grasp the weight of the whole vehicle in real time, and the driver often needs to return to a bulk warehouse for replenishing or unloading after driving to a wagon balance and passing the vehicle after loading. This results in a low efficiency of the bulk operation. After the release of relevant regulations for over-management, various enterprises are seeking fast, effective, economic and accurate bulk metering devices. In order to improve the efficiency and the quality of loading solid bulk materials for customers, the following solutions are available:
scheme one, install the weighbridge under cement bulk vehicle passageway. Of course, this is good if the tunnel is being constructed, and the ground weight is installed just below the bulk lane design. However, if the wagon balance is not designed under the bulk wagon lane during the construction of the channel, the later stage installation difficulty is very high, and a plurality of factors need to be considered. The disadvantages of this solution are: 1. the selection of the wagon balance installation mode is difficult, and the main reason is that foundation pit installation or non-foundation pit installation needs to be considered. If the installation without a foundation pit is adopted, after the wagon balance is installed under the bulk loading lane, the plane of the wagon balance is at least 58cm higher than the zero meter plane, and after the bulk loading vehicle is opened, an operator enters the vehicle top to open the loading hole cover, so that the operator is very difficult and dangerous to enter the vehicle for operation; if the weighbridge is installed by adopting the foundation pit, the foundation of the weighbridge needs to be excavated again, and the foundation of the bulk storage needs to be damaged, so that the installation is very dangerous, the foundation pit is easy to irrigate in rainy season after the foundation pit is installed, and the maintenance amount is large. The above-mentioned problems are very likely to affect the metering accuracy and the service life. 2. During loading, materials cannot be scattered, and the truck scale is very easy to block; if the cement is scattered into the foundation pit, the cement is easy to harden when meeting moisture and block the truck scale. 3. The truck scale is a strong inspection device, needs to be inspected by a third party (a technical supervision department) every year, and needs to invest a lot of manpower, material resources, financial resources and time for a factory.
Scheme two, adopt pipeline formula microwave solid flowmeter, the shortcoming: the precision is not enough, can reach 1-3% under the ideal state, if the site working condition is not good, the blanking is not smooth, and the precision is worse.
And the Coriolis scale is installed at the bottom of the bulk storage, the Coriolis scale technology adopts conversion force, and materials impact a rotor and then are transferred to a weighing sensor, so that the requirement on precise processing and large maintenance amount are met. The material has lumps or foreign matters, which easily causes inaccurate metering or blockage.
Scheme four, rotor scale, install rotor scale at the bottom of storehouse in bulk. The advantages are that: the construction period is short, the metering precision is high, and the metering precision can reach 0.2 to 0.5 percent under an ideal condition; good sealing performance, no dust emission, environmental protection and small maintenance amount. The disadvantages are high equipment price, heavy weight, large volume, quite large field space and inconvenient field installation.
Disclosure of Invention
The utility model aims at providing a slotted flowmeter that a great deal of problem that exists in order to solve current metering device in bulk in the use and provide.
The utility model provides a body of chute type flowmeter is a box, and the upper portion of box inner chamber is equipped with the baffle box, and the exit of baffle box is provided with measures the spout, and the rear portion of measuring the spout is provided with the dynamometry pressure head, and the sub-unit connection of dynamometry pressure head has weighing sensor, and the dynamometry pressure head can be in carrying weighing sensor in real time the impact force of measuring the spout transmission, and the lower part both sides of measuring the spout are connected on the reed.
The feeding port at the top end of the guide chute is provided with a feeding buffer hopper, and the discharging port at the lower end of the guide chute corresponds to the tangential direction of the feeding port of the measuring chute.
The measuring chute is an arc-shaped groove, the reeds connected with two sides of the measuring chute are provided with four reeds, each side of the measuring chute corresponds to two reeds, two reeds on each side are arranged in a mirror image mode, the reeds on the upper portion can swing along with the measuring chute, the bottoms of the reeds on the lower portion are fixed on the measuring base, the supporting shafts are pivoted at positions of the measuring chute corresponding to the reeds, the two ends of each supporting shaft penetrate through the side walls of the measuring chute and are connected onto the transverse plates, the front ends of the two transverse plates are fixedly connected onto the fixing plates, the bottom ends of the two fixing plates are fixed on the measuring base, a supporting beam is arranged between the lower portions of the two fixing plates, the supporting beam is assembled in the front sealing box, the reeds on two sides of the measuring chute, and the transverse plates and the fixing plates are assembled in the side sealing box.
The bottom of box is provided with out the hopper, goes out the import of hopper and corresponds the discharge gate setting of measuring the spout.
The force measuring pressure head and the weighing sensor are all assembled by the existing equipment, so the specific model and specification are not described in detail.
The utility model provides a slotted flowmeter's theory of operation as follows:
the material flow enters the measuring chute of the curved surface through the material guide groove, the material flow generates an acting force on the measuring chute, the weighing frame is connected with the scale body frame through the two groups of cross reeds, and the acting force forms a moment by taking the central lines of the two groups of cross reeds as axes. The distance between the stress point of the weighing sensor and the central line of the cross reed is a force arm. The torque is divided by the force arm, namely the acting force of the material on the weighing sensor.
The resultant force direction of the friction force generated by the sliding of the material on the measuring chute passes through the central fulcrum of the cross reed, namely the force arm is zero, so that the moment generated by the friction force is zero, and the weighing sensor only receives the acting force of the material flow, thereby ensuring the metering precision.
The utility model provides a measuring method of chute formula flow, its method includes following step:
step one, height H of solid bulk material falling0Calculating the speed v of any point during feeding and the initial speed v of entering a chute0The calculation formula is as follows:
(1/2)dm*v2-(1/2)dm*v0 2＝dm*g*H
v0 2＝2*g*H0
H＝Rsinθ
v2＝2g(H+H0)
wherein R is the radius of the middle thickness of the material flow, dm is the mass of the material flow within a tiny angle d theta, H is the vertical distance from the feeding position of the measuring chute to a certain point in the measuring chute, and g is the gravity acceleration;
step two, the solid bulk cargo slides into the measuring chute from the guide chute along the tangential direction, the curved surface measuring chute enables the material flow direction to generate impact-free deviation, so that a measuring force which is in direct proportion to the flow m, namely a centripetal force F is generated, the measuring force F is transmitted to the weighing sensor through the force measuring pressure head, and the data in the step one can be obtained:
dF＝dm*(v2/R)
dm＝B*h*R*dθ*ρ
and (3) integrating the angle theta 1 in the measuring chute with the dF to obtain the measuring force F borne by the whole chute:
b is the width of the measuring chute, h is the material flow thickness, and rho is the material density;
step three, the relation between F and B H R rho can be obtained by the measuring force F obtained in the step two, and the relation is substituted into the relation formula of m:
the quality of the material can be obtained.
The utility model has the advantages that:
the technical scheme that this patent provided can increase the measuring time of material to improve the detection precision of material flow. The flow is measured through the measuring chute, so that the impact of the material on the measuring equipment can be reduced, and the service life of the equipment is prolonged. The box body is used for fully sealing the equipment, so that the influence of the outside on the measurement precision is reduced, the splashing of materials is reduced, and the environment is protected. The material is driven to be conveyed by the aid of the gravity of the material, external additional driving is not needed, and measuring cost is reduced. The flow is measured by using the measuring chute, and compared with most other measuring equipment, the flow measuring device has the advantages that the size is reduced, and the field installation is facilitated.
Drawings
Fig. 1 is the overall structure schematic diagram of the chute type flowmeter of the present invention.
Fig. 2 is the rear view partial sectional structure schematic diagram of the chute-type flowmeter of the present invention.
Fig. 3 is a front view of the chute type flowmeter according to the present invention.
Fig. 4 is a schematic view of the connection relationship of the measuring chutes of the present invention.
Fig. 5 is a schematic view of the measuring method of the present invention.
The labels in the above figures are as follows:
1. the device comprises a box body 2, a guide chute 3, a measuring chute 4, a force measuring pressure head 5, a weighing sensor 6, a reed 7, a feeding buffer hopper 8, a measuring base 9, a supporting shaft 10, a transverse plate 11, a fixing plate 12, a supporting beam 13, a front sealing box 14, a side sealing box 15 and a discharging hopper.
Detailed Description
Please refer to fig. 1 to 5:
the utility model provides a body of chute type flowmeter is a box 1, and the upper portion of 1 inner chamber of box is equipped with baffle box 2, and the exit of baffle box 2 is provided with measures spout 3, and the rear portion of measuring spout 3 is provided with dynamometry pressure head 4, and the sub-unit connection of dynamometry pressure head 4 has weighing sensor 5, and in dynamometry pressure head 4 can carry weighing sensor 5 in real time to the impact force of measuring 3 transmissions of spout, the lower part both sides of measuring spout 2 are connected on reed 6.
A feeding buffer hopper 7 is assembled at the feeding port at the top end of the guide chute 2, and a discharging port at the lower end of the guide chute 2 corresponds to the tangential direction of the feeding position of the measuring chute 3.
The bottom of the box body 1 is provided with a discharge hopper 15, and an inlet of the discharge hopper 15 is arranged corresponding to a discharge hole of the measuring chute 3.
The force measuring pressure head 4 and the weighing sensor 5 are both assembled in the existing equipment, and therefore, the specific model and specification are not described in detail.
The utility model provides a slotted flowmeter's theory of operation as follows:
the material flow enters the measuring chute 3 of the curved surface through the material guide groove 2, the material flow generates an acting force on the measuring chute 3, the weighing frame is connected with the scale body frame through the two groups of cross reeds 6, and the acting force forms a moment by taking the central lines of the two groups of cross reeds 6 as axes. The distance between the stress point of the weighing sensor 5 and the central line of the cross reed 6 is a force arm. The torque is divided by the moment arm, which is the acting force of the material on the weighing sensor 5.
The resultant force direction of the friction force generated by the sliding of the material on the measuring chute 3 passes through the central fulcrum of the cross reed 6, namely the force arm is zero, so that the moment generated by the friction force is zero, and the weighing sensor 5 is only subjected to the acting force of the material flow, thereby ensuring the metering precision.
The utility model provides a measuring method of chute formula flow, its method includes following step:
step one, height H of solid bulk material falling0Calculating the speed v of any point during feeding and the initial speed v of entering a chute0The calculation formula is as follows:
(1/2)dm*v2-(1/2)dm*v0 2＝dm*g*H
v0 2＝2*g*H0
H＝Rsinθ
v2＝2g(H+H0)
wherein R is the radius of the middle thickness of the material flow, dm is the mass of the material flow within a tiny angle d theta, H is the vertical distance from the feeding position of the measuring chute 3 to a certain point in the measuring chute 3, and g is the gravity acceleration;
step two, the solid bulk cargo slides into the measuring chute 3 from the material guide groove 2 along the tangential direction, the curved surface measuring chute 3 enables the material flow direction to generate impact-free deviation, so that a measuring force which is in direct proportion to the flow m, namely a centripetal force F is generated, the measuring force F is transmitted to the weighing sensor 5 through the force measuring pressure head 4, and the data in the step one can be obtained:
dF＝dm*(v2/R)
dm＝B*h*R*dθ*ρ
and (3) integrating the angle theta 1 in the measuring chute with the dF to obtain the measuring force F borne by the whole chute:
b is the width of the measuring chute, h is the material flow thickness, and rho is the material density;
step three, the relation between F and B H R rho can be obtained by the measuring force F obtained in the step two, and the relation is substituted into the relation formula of m:
the quality of the material can be obtained.
Claims (4)
1. A chute-type flow meter characterized by: the body is a box, and the upper portion of box inner chamber is equipped with the baffle box, and the exit of baffle box is provided with measures the spout, and the rear portion of measuring the spout is provided with the dynamometry pressure head, and the sub-unit connection of dynamometry pressure head has weighing sensor, and the dynamometry pressure head can carry the impact force of measuring the spout transmission in real time to weighing sensor, and the lower part both sides of measuring the spout are connected on the reed.
2. The chute-type flow meter of claim 1, wherein: the feeding hole at the top end of the guide chute is provided with a feeding buffer hopper, and the discharging hole at the lower end of the guide chute corresponds to the tangential direction of the feeding hole of the measuring chute.
3. The chute-type flow meter of claim 1, wherein: the measuring spout be an arc wall, the reed of measuring the spout both sides connection is provided with four, it is provided with two reeds to measure every side correspondence of spout, two reeds of every side carry out the mirror image setting, the reed on upper portion can swing along with measuring the spout, the bottom of the reed of lower part is fixed on measuring the base, the position department that measures the spout and correspond the reed still the pin joint has the back shaft, the lateral wall that the both ends of back shaft passed the measuring spout is connected on the diaphragm, the front end rigid coupling of two diaphragms is on the fixed plate, the bottom mounting of two fixed plates is on measuring the base, be provided with a supporting beam between two fixed plate lower parts, a supporting beam assembles in the front seal box, the reed of measuring the spout both sides, diaphragm and fixed plate all assemble in the side seal box.
4. The chute-type flow meter of claim 1, wherein: the bottom of the box body is provided with a discharge hopper, and an inlet of the discharge hopper is arranged corresponding to a discharge port of the measuring chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121189480.2U CN214538082U (en) | 2021-05-31 | 2021-05-31 | Chute type flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121189480.2U CN214538082U (en) | 2021-05-31 | 2021-05-31 | Chute type flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214538082U true CN214538082U (en) | 2021-10-29 |
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ID=78284922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121189480.2U Active CN214538082U (en) | 2021-05-31 | 2021-05-31 | Chute type flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214538082U (en) |
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2021
- 2021-05-31 CN CN202121189480.2U patent/CN214538082U/en active Active
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