CN211466964U

CN211466964U - Admixture metering system of mixing plant

Info

Publication number: CN211466964U
Application number: CN201921502781.9U
Authority: CN
Inventors: 谢智聪; 陈美云; 冯振童
Original assignee: Fujian South Highway Machinery Co Ltd
Current assignee: Fujian South Highway Machinery Co Ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-09-11
Anticipated expiration: 2029-09-10

Abstract

The utility model relates to a concrete mixing equipment field, especially an admixture measurement system of stirring station. This kind of admixture measurement system of stirring station, including the admixture pond, stirring host computer, measurement injection apparatus locates the stirring host computer top, measurement injection apparatus includes the temporary storage case, liquid mass flowmeter, a control valve, the pipeline, pipeline top and temporary storage bottom of the case face intercommunication, an injection pipe is installed to the pipeline bottom, the injection pipe suspends in the stirring host computer, liquid mass flowmeter, the control valve is close to the injection pipe by setting gradually on the pipeline from top to bottom, the pipeline between control valve to the injection pipe adopts the hyaline tube, the admixture loops through the temporary storage case through the admixture pond, liquid mass flowmeter, the injection pipe flows to in the stirring host computer. The utility model discloses simple structure, with low costs, efficient, the precision is high, to the recycle that can try hard to add the agent outward, stops extravagantly.

Description

Admixture metering system of mixing plant

Technical Field

The utility model relates to a concrete mixing equipment field, especially an admixture measurement system of stirring station.

Background

The mixing plant produces concrete which, in addition to the aggregate, cementitious material and water, requires the incorporation of a certain amount of additives to improve the performance of the concrete.

At present, in order to realize the post-doping method and the fractional doping method, the admixture is generally weighed and then put into a stirring host machine by adopting a single pipeline. In order to avoid starting an additive pump to deliver additives downstairs to upstairs in the production process, a temporary storage tank is generally arranged upstairs above the stirring main machine, and the temporary storage tank can be used for more than 1 h. The additive pump only needs to be started when the additive is lower than the set liquid level in the temporary storage tank, and the high liquid level is stopped.

In the additive metering system of the existing mixing plant, an additive scale is arranged between a temporary storage tank and a mixing host, the temporary storage tank, the additive scale and the additive scale are connected in series by using pipelines, and the aim of weighing and putting into the mixing host is achieved by the dead weight of the additive. However, the time required for the structural admixture to be input is long, and the production efficiency of the mixing plant may be affected. In order to shorten the investment time too long, additional devices must be added, such as: blowing, pumping, pressurizing and the like to accelerate the input speed of the admixture. However, the structure and control of the added additional devices are complex, the cost is high, the number of fault points is large, and the maintenance amount is large.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main objective is overcome prior art's shortcoming, provides a simple structure, and is with low costs, efficient, and the precision is high, to the admixture measurement system of admixture recycle's stirring station as far as possible.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides an admixture measurement system of stirring station, includes admixture pond, stirring host computer, still includes measurement injection apparatus, the stirring host computer top is located to measurement injection apparatus, measurement injection apparatus includes temporary storage box, liquid mass flowmeter, control valve, pipeline top and temporary storage box bottom surface intercommunication, an injection pipe is installed to the pipeline bottom, and in the stirring host computer was hung in to the injection pipe, liquid mass flowmeter, control valve were close to the injection pipe by the last setting in proper order on the pipeline down, pipeline adoption hyaline tube between control valve to the injection pipe, the admixture loops through temporary storage box, liquid mass flowmeter, injection pipe through the admixture pond and flows to the stirring host computer in.

Furthermore, the injection pipe is perpendicular to the pipeline and is installed at the bottom end of the pipeline through a three-way pipe fitting, and a plurality of small injection holes are uniformly distributed in the injection pipe.

Furthermore, the upper end of the pipeline of the metering injection device is higher than the bottom surface of the temporary storage box and is communicated with the bottom surface of the temporary storage box.

Further, still include into liquid piping installation, it includes liquid feeding pipe, overflow pipe, evacuation pipe to advance liquid piping installation, liquid feeding pipe is used for providing the admixture for the temporary storage case, liquid feeding pipe one end is connected with the temporary storage incasement of locating of buffering step-down pipe, and the admixture pond bottom of arranging in of admixture pump is installed to the liquid feeding pipe other end, the evacuation pipe passes through tee bend pipe fitting and last liquid union coupling, and admixture pond upper portion is arranged in to the evacuation pipe bottom, overflow pipe one end run through temporary storage case lateral wall with temporary storage case communicate with each other and be connected, the other end passes through tee bend pipe fitting and connects on the evacuation pipe.

Further, still include clear case device, clear case device includes clear case pipe, clear case pipe one end exceeds the temporary storage tank bottom surface communicate with each other with the temporary storage tank, and the other end passes through the tee bend pipe fitting and connects on the overflow pipe, is provided with a ball valve on the clear case pipe, the ball valve is opened and is made the interior recoverable admixture of temporary storage tank flow back to the admixture pond through the overflow pipe.

Further, the box cleaning device further comprises a drain pipe and a waste liquid barrel, one end of the drain pipe is lower than or is communicated with the temporary storage box in parallel with the bottom surface, the other end of the drain pipe is arranged at the upper part in the waste liquid barrel, a ball valve is arranged on the drain pipe, and the ball valve is opened to discharge unusable waste liquid into the waste liquid barrel.

Furthermore, a low liquid level meter and a high liquid level meter are arranged in the temporary storage tank, one end of the overflow pipe is higher than the horizontal line of the low end of the high liquid level meter, penetrates through the side wall of the temporary storage tank and is communicated with the temporary storage tank, and the buffering pressure reducing pipe is positioned above the horizontal line of the low end of the high liquid level meter in the temporary storage tank.

Furthermore, a flow stabilizing plate is arranged in the temporary storage box in a vertical mode, a gap is formed between the bottom end of the flow stabilizing plate and the bottom surface of the temporary storage box, the temporary storage box is divided into a liquid inlet area and a liquid using area which are communicated through the flow stabilizing plate, a pipeline of the metering and spraying device is arranged in the liquid using area, and the liquid inlet pipeline device and the box cleaning device are arranged in the liquid inlet area.

Furthermore, a check valve is arranged on a pipeline at the joint of the liquid feeding pipe and the emptying pipe, which is close to the admixture pool, and a ball valve is arranged at the other side of the joint of the liquid feeding pipe and the emptying pipe.

Furthermore, a section of pipeline on the overflow pipe adopts a transparent pipe.

It can be known from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are:

firstly, the utility model can flexibly control the specific time when the admixture is thrown into the stirring main machine, realize the post-mixing method and the fractional mixing method, avoid part of the admixture to be absorbed by the sandstone, fully play the due action of the used admixture, and avoid the resource waste of the admixture;

secondly, a temporary storage box is arranged above the stirring main machine and used for storing the admixture, so that the situation that an admixture pump is started to deliver the admixture below the building to the building in the production process can be avoided; a liquid mass flowmeter is adopted between the stirring main machine and the temporary storage box, so that the liquid gravitational potential energy between the stirring main machine and the temporary storage box and the liquid gravitational potential energy of the temporary storage box can be fully utilized, and the pressure and the time for feeding the admixture into the stirring main machine are more easily ensured;

third, the utility model discloses change traditional additive and weigh the mode, the potential energy of make full use of additive, structure and control are all simple, and pipe-line system's setting is simple reasonable, and the additive under each condition of the abundant assurance can all be recycle as far as possible, stops extravagantly.

Drawings

Fig. 1 is a schematic view of the overall structure of the admixture metering system of the mixing plant according to the embodiment of the present invention.

Fig. 2 is an enlarged view of a in fig. 1 according to an embodiment of the present invention.

In the figure: 1. the system comprises an additive pool, 2, a stirring host, 3, a metering injection device, 31, a temporary storage tank, 311, a high liquid level meter, 312, a low liquid level meter, 313, a flow stabilizer, 314, a liquid inlet area, 315, a liquid using area, 32, a liquid mass flowmeter, 33, a control valve, 34, a pipeline, 35, an injection pipe, 36, a ball valve, 4, a liquid inlet pipeline device, 41, a liquid feeding pipe, 411, a check valve, 412, a movable joint, 413, a ball valve, 42, an overflow pipe, 43, a emptying pipe, 44, a buffering pressure reducing pipe, 45, an additive pump, 5, a box cleaning device, 51, a box cleaning pipe, 511, a ball valve, 52, a blow-off pipe, 521, a ball valve and 53, and a waste liquid barrel.

Detailed Description

The present invention will be further described with reference to the following detailed description.

Referring to fig. 1 to 2, the utility model discloses an admixture measurement system of mixing plant, including admixture pond 1, stirring host computer 2, measurement injection apparatus 3, feed liquor pipe-line device 4, clear case device 5.

The metering and spraying device 3 is arranged above the stirring host machine 2, the metering and spraying device 3 comprises a temporary storage tank 31, a liquid mass flow meter 32, a control valve 33, a pipeline 34 and a spraying pipe 35, the spraying pipe 35 is perpendicular to the pipeline 34 and is arranged at the bottom end of the pipeline 34 through a three-way pipe, the top end of the pipeline 34 is higher than the bottom surface of the temporary storage tank 31 and is communicated with the temporary storage tank 31 so as to ensure that sediments at the bottommost part of the temporary storage tank 31 cannot easily enter the pipeline 34 of the metering and spraying device 3, the spraying pipe 35 is suspended in the stirring host machine 2, a plurality of small spraying holes are uniformly arranged on the spraying pipe 35, as the low liquid level of the temporary storage tank 31 is generally higher than the spraying pipe 35 by about 5m, the pressure of the additive flowing through the liquid mass flow meter 32 and discharged from the spraying pipe 35 is relatively high, the metering and spraying time of the additive can; the liquid mass flow meter 32 and the control valve 33 are arranged on the pipeline 34 from top to bottom and close to the injection pipe 35, the liquid mass flow meter 32 and the control valve 33 are close to the injection pipe 35 as much as possible, the time for feeding the admixture into the stirring host machine 2 after metering is shortened, the drop value of automatic control adjustment of the system is reduced, and the control valve 35 is arranged below the liquid mass flow meter 32, so that the liquid mass flow meter 32 is filled with the admixture at any time, the normal working condition requirement of the liquid mass flow meter 32 is ensured, and the accuracy and high precision requirement of the admixture metering are ensured; the pipeline between the control valve 33 and the tee pipe fitting is a transparent pipe, so that an operator can directly observe whether the admixture flows through clearly with naked eyes, the whole process of admixture metering can be observed at any time, meanwhile, whether the control valve 33 is damaged or not can be found in time, and production accidents caused by the admixture flowing into the stirring main machine 2 can be avoided in time; a ball valve 36 is provided above the liquid mass flow meter 32 to facilitate service and maintenance of the liquid mass flow meter 32. When the control valve 33 receives a working instruction, the control valve 33 is opened, the admixture flows through the liquid mass flow meter 32, the liquid mass flow meter 32 can measure the mass of the admixture passing through the working time period in real time, measured data is fed back to the control system for comparison, when the measured data meets the requirement of a design target value, the control system automatically sends an instruction to the control valve 33, the control valve 33 is closed, and the whole admixture metering process is completed.

An additive pool 1 is arranged downstairs at one side of the stirring main machine 2, the liquid inlet pipeline device 4 comprises an upper liquid pipe 41, an overflow pipe 42 and an emptying pipe 43, one end of the upper liquid pipe 41 is connected with a buffer pressure reducing pipe 44 which is arranged in the temporary storage tank 31, the buffer pressure reducing pipe 44 has the function of reducing the outlet pressure by using the flow dividing principle, the additive is metered in the process of pumping the additive to the temporary storage tank 31, the buffer pressure reducing pipe 44 can reduce or even eliminate the impact when the additive is pumped to the temporary storage tank 31 so as to generate adverse effect on the stable material flow when the liquid mass flowmeter 32 works, the other end of the upper liquid pipe 41 is provided with an additive pump 45 which is arranged at the bottom of the additive pool 1, the emptying pipe 43 is connected with the upper liquid pipe 41 through a three-way pipe, the bottom of the emptying pipe 43 is arranged at the upper part in the additive pool 1, a ball valve 431 is arranged on the emptying pipe 43, the other end is connected to the emptying pipe 43 through a three-way pipe, the pipeline at one end of the overflow pipe 42 adopts a transparent pipe, and an operator can directly observe whether the admixture overflows or not by naked eyes so as to detect whether the high liquid level meter 311 fails or not; the pipeline of the joint of the upper liquid pipe 41 and the emptying pipe 43 close to the admixture pool 1 is provided with a check valve 411 and a movable joint 412, the other side of the joint of the upper liquid pipe 41 and the emptying pipe 43 is provided with a ball valve 413, the check valve 411 can prevent the admixture in the upper liquid pipe 41 from flowing back to the admixture pool 1 when the admixture pump 45 does not work, the pipeline is required to be pumped again when the admixture is required to be pumped again next time, the admixture pumping time is prolonged, and the ball valve 413 and the movable joint 412 are arranged to facilitate the disassembly and maintenance of the check valve 411.

The high level gauge 311 and the low level gauge 312 are arranged in the temporary storage tank 31, and the specific positions of the high level gauge 311 and the low level gauge 312 are determined by designing the volume of the temporary storage tank 31 according to the maximum production rate of the main mixer 2 per hour and the maximum additive consumption of each side of concrete allowed by relevant standards. One end of the overflow pipe 42 is higher than the horizontal line of the lower end of the high level gauge 311, and communicates with a side wall of the temporary storage tank 31, and the buffer pressure-reducing pipe 44 is located above the horizontal line of the lower end of the high level gauge 311 in the temporary storage tank 31. When the liquid level of the admixture in the temporary storage tank 31 is lower than the low liquid level meter 312, the admixture pump 45 is automatically controlled to be started to pump the admixture into the temporary storage tank 31 through the upper liquid pipe 41 until the liquid level reaches the high liquid level meter 311, and the operation of the admixture pump 45 is automatically controlled to be stopped so as to finish the pumping requirement of the admixture. The overflow pipe 42 is arranged to prevent the malfunction of the high level gauge 311, and the pumping work of the admixture pump 45 cannot be automatically stopped in time, so that the admixture is prevented from overflowing out of the temporary storage tank 31, and can directly flow back to the admixture pool 1. The arrangement of the emptying pipe 43 is to prevent the admixture in the upper liquid pipe 41 from being frozen or condensed or even crystallized to affect the efficiency of the admixture when the machine is shut down too long in cold weather, and the admixture in the upper liquid pipe 41 can be discharged back to the admixture pool 1 through the emptying pipe 43.

The box cleaning device 5 comprises a box cleaning pipe 51, a sewage discharge pipe 52 and a waste liquid barrel 53, one end of the box cleaning pipe 51 is higher than the bottom surface of the temporary storage box 31 and is communicated with the temporary storage box 31 so as to ensure that the sediment at the bottommost part of the temporary storage box 31 is not easy to enter the recyclable additive when the temporary storage box 31 is cleaned, the other end of the box cleaning pipe is connected to the overflow pipe 42 through a tee pipe, the box cleaning pipe 51 is provided with a ball valve 511, and when the box cleaning is needed, the ball valve 511 is opened so that the recyclable additive in the temporary storage box 31 can flow back to the additive pool 1 through the overflow pipe 42; one end of the drain pipe 52 is lower than or is communicated with the temporary storage tank 31 in parallel with the bottom surface, so that the temporary storage tank 31 can be cleaned to drain the waste liquid completely when the tank is cleaned, the other end of the drain pipe is arranged at the upper part in the waste liquid barrel 53, the drain pipe 52 is provided with a ball valve 521, when the recycling additive in the temporary storage tank 31 is recycled, the unusable waste liquid is left, the ball valve 521 is opened to drain the unusable waste liquid into the waste liquid barrel 53, and the harmless treatment is carried out according to the environmental protection requirement.

A steady flow plate 313 is vertically arranged in the temporary storage tank 31, a gap is arranged between the bottom end of the steady flow plate 313 and the bottom surface of the temporary storage tank 31, the steady flow plate 313 divides the temporary storage tank 31 into a liquid inlet area 314 and a liquid using area 315 which are communicated, a pipeline of the metering and spraying device 3 is arranged in the liquid using area 315, and the liquid inlet pipeline device 4 and the tank cleaning device 5 are arranged in the liquid inlet area 314. The stabilizing plate 313 has a separation function, and the impact on the liquid inlet area 314 when the additive is pumped is reduced or even eliminated on the liquid using area 315 under the action of the stabilizing plate 313.

The working principle of the admixture metering system of the mixing plant is as follows:

the admixture in the admixture pool 1 is pumped into the temporary storage tank 31 through the upper liquid pipe 41, when the admixture in the temporary storage tank 31 is used until the liquid level of the admixture is lower than the low liquid level meter 312, the admixture pump 45 is automatically controlled to be started to pump the admixture into the temporary storage tank 31 through the upper liquid pipe 41 until the liquid level reaches the high liquid level meter 311, and the operation of the admixture pump 45 is automatically stopped to fulfill the pumping requirement of the admixture; when the control valve 33 receives a working instruction, the control valve 33 is opened, the admixture in the temporary storage tank 31 flows through the liquid mass flow meter 42, the liquid mass flow meter 42 can constantly measure the mass of the admixture passing through the working time period, the measured data is fed back to the control system for comparison, when the measured data meets the requirement of a design target value, the control system automatically sends an instruction to the control valve 43, the control valve 43 is closed, and the whole admixture metering process is completed; the metered additive flows to the injection pipe 35 and is uniformly sprayed into the stirring main machine 2 through the small injection holes uniformly arranged on the injection pipe 35.

The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited to this, and the present invention is to be used for insubstantial modification of the present invention, which all infringes the protection scope of the present invention.

Claims

1. The utility model provides an admixture measurement system of stirring station, includes admixture pond, stirring host computer, its characterized in that: still include measurement injection apparatus, measurement injection apparatus locates stirring host computer top, measurement injection apparatus includes temporary storage box, liquid mass flowmeter, control valve, pipeline top and temporary storage box bottom surface intercommunication, an injection pipe is installed to the pipeline bottom, and in the stirring host computer was hung to the injection pipe, liquid mass flowmeter, control valve were close to the injection pipe by last to setting gradually on the pipeline down, the pipeline of control valve between to the injection pipe adopts the hyaline tube, the admixture loops through temporary storage box, liquid mass flowmeter, injection pipe flow to in the stirring host computer through the admixture pond.

2. The admixture metering system of a mixing plant of claim 1, wherein: the spraying pipe is perpendicular to the pipeline and is arranged at the bottom end of the pipeline through a three-way pipe fitting, and a plurality of small spraying holes are uniformly arranged on the spraying pipe.

3. The admixture metering system of a mixing plant of claim 1, wherein: the upper end of the pipeline of the metering injection device is higher than the bottom surface of the temporary storage box and is communicated with the bottom surface of the temporary storage box.

4. The admixture metering system of a mixing plant of claim 1, wherein: still include into liquid pipe means, it includes liquid feeding pipe, overflow pipe, evacuation pipe to advance liquid pipe means, the liquid feeding pipe is used for providing the admixture for the temporary storage case, liquid feeding pipe one end is connected with the temporary storage incasement of locating of buffering step-down pipe, and the admixture bottom of the pool portion of arranging in of additive pump is installed to the liquid feeding pipe other end, the evacuation pipe passes through tee bend pipe fitting and last liquid union coupling, and upper portion in the additive pond is arranged in to the evacuation pipe bottom, overflow pipe one end run through temporary storage case lateral wall with temporary storage case communicate with each other and be connected, the other end passes through tee bend pipe fitting and connects on the evacuation pipe.

5. The admixture metering system of claim 4, wherein: the liquid inlet pipeline device further comprises a box cleaning device, the box cleaning device comprises a box cleaning pipe, one end of the box cleaning pipe is higher than the bottom surface of the temporary storage box and communicated with the temporary storage box, the other end of the box cleaning pipe is connected to the overflow pipe through a tee pipe, a ball valve is arranged on the box cleaning pipe, and the ball valve is opened to enable recyclable additives in the temporary storage box to flow back to the additive pool through the overflow pipe.

6. The admixture metering system of claim 5, wherein: the box cleaning device further comprises a drain pipe and a waste liquid barrel, one end of the drain pipe is lower than or is parallel and level to the bottom surface and communicated with the temporary storage box, the other end of the drain pipe is arranged at the upper part in the waste liquid barrel, a ball valve is arranged on the drain pipe, and the ball valve is opened to discharge unusable waste liquid into the waste liquid barrel.

7. The admixture metering system of claim 4, wherein: the temporary storage tank is internally provided with a low liquid level meter and a high liquid level meter, one end of the overflow pipe is higher than the horizontal line at the low-level end of the high liquid level meter, penetrates through the side wall of the temporary storage tank and is communicated with the temporary storage tank, and the buffering pressure reducing pipe is positioned above the horizontal line at the low-level end of the high liquid level meter in the temporary storage tank.

8. The admixture metering system of claim 6, wherein: the temporary storage box is also internally provided with a vertically arranged flow stabilizing plate, a gap is arranged between the bottom end of the flow stabilizing plate and the bottom surface of the temporary storage box, the temporary storage box is divided into a liquid inlet area and a liquid using area which are communicated with each other by the flow stabilizing plate, a pipeline of the metering and spraying device is arranged in the liquid using area, and the liquid inlet pipeline device and the box cleaning device are arranged in the liquid inlet area.

9. The admixture metering system of claim 4, wherein: the pipeline of the joint of the liquid feeding pipe and the emptying pipe, which is close to the admixture pool, is provided with a check valve, and the other side of the joint of the liquid feeding pipe and the emptying pipe is provided with a ball valve.

10. The admixture metering system of claim 4, wherein: one section of pipeline on the overflow pipe adopts a transparent pipe.