CN209802687U - Dry powder blowing performance experimental device - Google Patents
Dry powder blowing performance experimental device Download PDFInfo
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- CN209802687U CN209802687U CN201920678745.1U CN201920678745U CN209802687U CN 209802687 U CN209802687 U CN 209802687U CN 201920678745 U CN201920678745 U CN 201920678745U CN 209802687 U CN209802687 U CN 209802687U
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Abstract
The present disclosure relates to a dry powder blowing performance experimental apparatus, including: a dry powder tank (1) comprising a first inlet end (A) for connecting a gas source, a second inlet end (C) for connecting a dry powder source and an outlet end (B) for communicating with an object to be tested; the weighing sensor (2) is arranged below the dry powder tank (1) and is used for weighing the weight of the dry powder tank (1) in real time; and the data processing platform (3) is in signal connection with the weighing sensor (2) and is used for calculating the real-time effective dry powder spraying rate according to the real-time weighing data of the weighing sensor (2). The embodiment of the disclosure can realize effective test of the dry powder spraying performance.
Description
Technical Field
the utility model relates to a fire control field especially relates to a dry powder blows performance experimental apparatus.
background
the dry powder fire truck is mainly provided with a dry powder fire extinguishing agent tank and a set of dry powder injection device and is mainly used for extinguishing fires of flammable liquid (such as oil, liquid hydrocarbon, alcohol, ester, ether and the like), combustible gas (such as liquefied petroleum gas, natural gas, coal gas and the like) and electrical equipment and the like. According to the requirements of national relevant standards, the effective injection rate and the powder remaining rate of a dry powder gun of a dry powder fire truck are main technical indexes for examining the fire-fighting performance of the dry powder fire truck. At present, due to the lack of a large-flow dry powder injection test bed in the industry, the experimental research on the aspect of dry powder-nitrogen gas-solid two-phase flow injection in the industry is stopped in a small-size simulation test, and the mode does not have the authenticity of an equal-size test. Most production enterprises are tested on the whole machine, the mode cannot realize the simulation of different filling conditions and the parameter measurement of pipeline conveying fluid, the quantitative and real-time analysis and comparison cannot be implemented, and the final sprayed dry powder effect can be only used for qualitative evaluation or analysis according to the measurement result of an average time period, so that the design optimization of the dry powder spraying performance is not stopped for a long time. The evaluation method and means of the industry detection mechanism for the dry powder spraying performance have the defects. The concrete features the following two aspects:
1. The dry powder blowing devices of the existing dry powder fire truck and the elevating fire truck are all blowing at constant pressure, and the inflation pressure of a dry powder tank is basically set to be 1.5MPa no matter how the pipeline composition is. However, in practice, when the lengths and the compositions of the pipelines from the dry powder tank to the dry powder gun are different, the pressure losses of the pipelines are different, and the performance optimization of the dry powder injection system can be realized only by deeply researching the association relationship between different filling conditions, the pressure losses of the pipelines and the design of the pipelines by manufacturers.
2. The spraying principle of the vehicle-mounted dry powder system is that the pre-charging pressure is used for fully fluidizing and then the output port is opened, so that the spraying process is a pressure reduction process and the dry powder content is rapidly reduced. The injection time specified in the existing standard is from the start of the output port after the fluidization is finished to the end of the time when the pressure of the dry powder tank is reduced to 0.5 MPa. The effectiveness of dry powder blasting is the content of the fire extinguishing agent, so the judgment of whether to continue spraying is based on the real-time effective spraying rate (unit: kg/s) of the dry powder instead of the pressure of the dry powder tank. Since even if the pressure in the dry powder tank is still large, if the content of the ejected dry powder is already small, there is not sufficient supply intensity, and it is basically worthless to continue the ejection, that is, wasting the powder wastes nitrogen gas.
However, considering the difficulty of real-time detection on a vehicle, the current industry standard detection method for the effective injection rate of the dry powder is to combine weighing (subtracting the weight at the end of injection from the weight at the initial injection) and manual stopwatch timing. The detection mode actually calculates an average value, cannot reflect the effective injection rate of the dry powder metered in real time, and is not reasonable as an evaluation index.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present disclosure provides a dry powder blowing performance experimental apparatus, which can implement effective test of dry powder spraying performance.
In one aspect of the present disclosure, there is provided a dry powder blowing performance experiment apparatus, including:
the dry powder tank comprises a first inlet end used for being connected with a gas source, a second inlet end used for being connected with the dry powder source and an outlet end used for being communicated with the object to be tested;
the weighing sensor is arranged below the dry powder tank and used for weighing the weight of the dry powder tank in real time;
And the data processing platform is in signal connection with the weighing sensor and is used for calculating the real-time effective dry powder spraying rate according to the real-time weighing data of the weighing sensor.
in some embodiments, the dry powder blowing performance experiment apparatus further comprises:
The first flow meter is arranged between the dry powder tank and the gas source and used for detecting the flow of the gaseous medium entering the dry powder tank;
The data processing platform is in signal connection with the first flow meter and used for determining whether the dry powder tank reaches a specified gas-solid ratio filling condition or not according to the tank inlet flow detected by the first flow meter.
In some embodiments, the gas source comprises:
A gas cylinder group comprising a plurality of inflatable or replaceable high-pressure gas cylinders for storing gaseous media, the gas cylinder group being communicated with the first inlet end of the dry powder tank through a pipeline;
The electronic control pressure reducing valve is arranged on a pipeline between the gas cylinder group and the first inlet end in series and used for adjusting the pressure reducing output quantity passing through the electronic control pressure reducing valve;
the data processing platform is in signal connection with the electric control pressure reducing valve and is used for controlling the electric control pressure reducing valve to simulate the inflation pressure condition of the dry powder tank.
in some embodiments, a first pressure gauge and a second pressure gauge are respectively arranged at two ends of the electrically controlled pressure reducing valve, and are used for detecting and displaying pressure values of the gaseous medium before and after pressure reduction.
In some embodiments, the gas source further comprises:
and the first ball valve is serially arranged on a pipeline between the electric control pressure reducing valve and the gas cylinder group and is used for opening or closing gas supply of the gas cylinder group.
in some embodiments, the dry powder blowing performance experiment apparatus further comprises:
the first pressure sensor is arranged at the first inlet end and used for detecting the inflation pressure in the dry powder tank;
the tank air inlet valve is arranged on a pipeline between the air source and the first pressure sensor in series and used for executing air inlet opening and closing and opening control of the dry powder tank;
The data processing platform is in signal connection with the first pressure measuring sensor and used for determining the inflation pressure state of the dry powder tank according to the inflation pressure value detected by the first pressure measuring sensor, and the data processing platform is in signal connection with a tank air inlet valve and used for controlling the opening and closing of the tank air inlet valve and the valve opening according to the determined inflation pressure state of the dry powder tank.
In some embodiments, the dry powder blowing performance experiment apparatus further comprises:
The dry powder tank outlet valve is arranged on a pipeline between the outlet end and the object to be tested in series and is used for executing opening and closing of output of gas-solid two-phase flow in the dry powder tank and opening degree control;
The second pressure measuring sensor is arranged on a pipeline between the dry powder tank outlet valve and the object to be tested in series and used for detecting the pressure change state of the gas-solid two-phase flow output by the dry powder tank;
the data processing platform is in signal connection with the second pressure measuring sensor and the dry powder tank outlet valve and is used for controlling opening and closing of the dry powder tank outlet valve and opening of the valve according to test requirements when different filling conditions of the dry powder tank are simulated so as to analyze influences of working condition changes of an outlet end of the dry powder tank on pressure in a pipeline connected with the outlet end.
In some embodiments, the dry powder blowing performance experiment apparatus further comprises:
the purging pipeline is used for communicating the gas source with the object to be tested;
and the second ball valve is arranged on the purging pipeline in series and used for enabling the purging pipeline to be communicated or shut off.
In some embodiments, the dry powder blowing performance experiment apparatus further comprises:
The second flowmeter is arranged on the purging pipeline in series and used for detecting the flow of the gaseous medium passing through the purging pipeline;
The data processing platform is in signal connection with the second flow meter and used for collecting the purge flow detected by the second flow meter.
in some embodiments, the dry powder canister further comprises: a third ball valve disposed in series between the second inlet port and the dry powder source for opening or closing the dry powder filling of the dry powder canister.
In some embodiments, the dry powder canister further comprises: the air exhaust end and a fourth ball valve are arranged at the air exhaust end, and the fourth ball valve is used for opening or closing the air exhaust of the dry powder tank; and a third pressure gauge is arranged on a pipeline between the fourth ball valve and the exhaust end and used for detecting and displaying the exhaust pressure of the dry powder tank.
in some embodiments, the dry powder blowing performance experiment apparatus further comprises a moving trolley, the moving trolley comprising: the dry powder tank device comprises a vehicle body for bearing a dry powder tank, a moving mechanism capable of moving relative to the ground and a supporting leg arranged on the vehicle body, wherein the supporting leg can extend downwards relative to the vehicle body to abut against the ground.
In some embodiments, the subject to be tested comprises: a jet pipeline of gas-solid two-phase flow or a fire engine.
Therefore, according to the embodiment of the present disclosure, the weighing sensor is arranged below the dry powder tank, and the weight of the dry powder tank is weighed by the weighing sensor in real time, so that the data processing platform can calculate the real-time effective dry powder spraying rate according to the real-time weighing data of the weighing sensor, and the dry powder spraying performance of the test object can be effectively evaluated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
the present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
Fig. 1 is a schematic structural view of some embodiments of a dry powder blowing performance experiment apparatus according to the present disclosure.
It should be understood that the dimensions of the various parts shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
the use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
As shown in fig. 1, is a schematic structural view of some embodiments of a dry powder blowing performance test apparatus according to the present disclosure. As shown in fig. 1, in some embodiments, the dry powder blowing performance test apparatus comprises: dry powder jar 1, weighing sensor 2 and data processing platform 3. In some embodiments, the dry powder tank 1 has a volume of 1-2 m3The working pressure is 1.6 MPa. The dry powder jar 1 may comprise a first inlet end a for connection to a gas source, a second inlet end C for connection to a dry powder source and an outlet end B for communication with the object to be tested. The filling of the dry powder tank 1 with the gaseous medium and the dry powder is achieved through the first inlet end a and the second inlet end C. The second inlet end may be located at the top of the dry powder tank 1. referring to fig. 1, the dry powder tank 1 may further comprise a third ball valve 17 arranged in series between said second inlet end C and said dry powder source. The third ball valve 17 is used for opening or closing the dry powder filling of the dry powder tank 1. In addition, the second inlet end C can be connected with a dry powder spraying and collecting device (such as a bag-type dust collector or a cyclone dust collector) of the dry powder blowing performance experimental device in the test process, so that the dry powder can be repeatedly used for testing, and the economy is improved.
the gas-solid two-phase flow obtained by mixing dry powder (such as sodium bicarbonate dry powder, modified sodium salt dry powder, potassium salt dry powder, ammonium dihydrogen phosphate dry powder, diammonium hydrogen phosphate dry powder, phosphoric acid dry powder or amino dry powder extinguishing agent) in a dry powder tank with gaseous medium (such as nitrogen, carbon dioxide or inert gas) can be provided for the object to be tested through the outlet end B. The process of feeding the gaseous medium into the dry powder tank 1 is called dry powder fluidization, that is, the process of leading dry powder particles to show a fluid-like state under the action of fluid pressurization, blowing and mixing by filling the dry powder tank with the medium/low pressure gaseous medium. The drift diameter of the outlet end B can be designed according to the rated flow of the sprayed dry powder which is less than or equal to 30 kg/s.
The object to be tested can comprise a gas-solid two-phase flow injection pipeline to be tested, such as a basic pipeline (a reducer pipe and a diversion pipe) or a combined pipeline, and the conditions of pressure loss, dry powder precipitation and the like of the pipeline under the conditions of different gas-solid ratios, different flow rates and the like can be realized through tests, so that the pipeline is optimally designed according to the test result. In other embodiments, the subject may include a fire engine. The dry powder tank is connected with the injection pipeline in the fire fighting truck to be tested to simulate the dry powder injection system of various fire fighting trucks, so that the actual injection performance of the pipeline in the system is tested and verified.
the weighing sensor 2 is arranged below the dry powder tank 1 and used for weighing the weight of the dry powder tank 1 in real time. Since the weight of the dry powder tank 1 is known, the weight of the dry powder in the dry powder tank 1 can be known by weighing the dry powder tank 1 containing the dry powder. The load cells 2 are preferably arranged in at least three places on the lower support of the dry powder tank 1, for example in a four-point support, for effective measurement of the weight of the dry powder tank 1.
and the data processing platform 3 is in signal connection with the weighing sensor 2 and is used for calculating the real-time effective dry powder spraying rate according to the real-time weighing data of the weighing sensor 2. The data processing platform 3 may comprise individual servers or distributed clusters of servers. The weighing sensor 2 can perform weighing of the weight of the dry powder tank 1 in real time, and when a spray test is performed, the weight of the dry powder tank 1 is reduced because a mixture of dry powder and gaseous medium is sprayed. Since the proportion of gaseous substances in the mixture is usually less than 5%, the data processing platform 3 can directly determine the amount of the dry powder ejected from the dry powder tank in one sampling period by the weight difference of the dry powder tanks at two adjacent sampling times when calculating, so as to further determine the effective ejection rate of the dry powder. Compared with the mode that the dry powder spraying rate is calculated by combining weighing (subtracting the weight at the end of spraying from the weight at the initial spraying time) and manual stopwatch timing in the existing mode, the dry powder spraying rate measuring method can obtain the more accurate dry powder effective spraying rate measured in real time, and can effectively evaluate the dry powder spraying performance.
In addition to this, the weighing cell 2 can also weigh the charge of each dry powder tank to meet the experimental requirements, for example by weighing to determine fluidization state simulations for different gas-solid ratios. The maximum bearing capacity and the display range of the weighing sensor 2 can be determined according to the volume of the dry powder tank, for example, the maximum bearing capacity is set to be 2.5-4 tons, the display range is set to be 0-1000 or 2000kg, and the metering precision is 0.5 kg.
Referring to fig. 1, in some embodiments, the dry powder blowing performance experiment apparatus further includes a first pressure sensor 4 and a canister air inlet valve 11. A first pressure sensor 4 is arranged at the first inlet end a and may be used to detect the inflation pressure inside the dry powder canister 1. The data processing platform 3 is in signal connection with the first pressure sensor 4 and is used for determining the inflation pressure state of the dry powder tank 1 according to the inflation pressure value detected by the first pressure sensor 4. For example, the same dry powder loading in the dry powder tank can be provided by the load cell 2, the dry powder tank is aerated, and fluidization of the dry powder is achieved at different aeration pressures in different experiments. And whether the inflation pressure reaches the set inflation pressure condition can be determined by the first pressure sensor 4. A tank inlet valve 11 may be arranged in series in the line between the gas source and the first pressure sensor 4, and may perform inlet opening and closing and opening control of the dry powder tank 1. The data processing platform 3 is in signal connection with a tank air inlet valve 11 and is used for controlling the opening and closing of the tank air inlet valve 11 and the valve opening according to the determined inflation pressure state of the dry powder tank 1. Thus, the control of the canister inlet valve 11 by the data processing platform 3 automatically achieves the specified inflation pressure conditions for the dry powder canister 1.
in fig. 1, the dry powder blowing performance test apparatus may further include a first flow meter 5. A first flow meter 5 may be arranged between the dry powder tank 1 and the gas source for detecting the flow of gaseous medium into the dry powder tank 1. The data processing platform 3 is in signal connection with the first flow meter 5 and is used for determining whether the dry powder tank 1 reaches a specified gas-solid ratio filling condition or not according to the tank inlet flow detected by the first flow meter 5. For example, a different weight of dry powder per fill in the dry powder canister may be measured by a load cell prior to inflating the dry powder canister, and the dry powder canister is then inflated with a gaseous medium and brought to the same inflation pressure. The flow of the gaseous medium entering the dry powder tank 1 is detected through the first flow meter 5 in the aeration process, so that the gas-solid ratio can be accurately calculated, and the jet simulation of different gas-solid ratios under the same pressure is realized.
The air source can be independent of the dry powder blowing performance experimental device and can also be a part of the dry powder blowing performance experimental device. Referring to FIG. 1, in some embodiments, the gas source may include a cylinder stack 6 and an electrically controlled pressure relief valve 7. The gas cylinder group 6 includes a plurality of inflatable or replaceable high-pressure gas cylinders 61. The high pressure cylinder may store gaseous medium up to a set pressure (e.g. 15 MPa). The gas cylinder group 6 is communicated with the first inlet end A of the dry powder tank 1 through a pipeline. The high-pressure gas cylinder 61 can be charged by the charging valve 62, and the gas cylinder 61 with insufficient pressure can be directly replaced by the charged high-pressure gas cylinder 61 as required. In order to enable multiple filling of the dry powder tank after one filling of the gas cylinder group 6, the capacity of the gas cylinder group is preferably determined according to a dry powder blow factor (e.g. 110L/kg).
the electrically controlled pressure reducing valve 7 is arranged in series on a pipeline between the gas cylinder group 6 and the first inlet end A, so that the pressure of a passing gaseous medium can be reduced, and the pressure reducing output quantity passing through the electrically controlled pressure reducing valve 7 can be adjusted according to a command. The decompression output quantity can be determined according to the volume of the dry powder tank or the dry powder sweeping flow, for the pipeline drift diameter of 40-80 mm, the setting range of the decompression output quantity of the electric control decompression valve 7 can be 1.2-1.7 MPa, and the proportion regulation precision can be smaller than 10% of the set pressure. The electrically controlled pressure reducing valve 7 can be in signal connection with the data processing platform 3, so that the data processing platform 3 controls the electrically controlled pressure reducing valve 7 according to the data acquired by the data processing platform, and the specified inflation pressure condition of the dry powder tank 1 can be accurately simulated.
referring to fig. 1, in some embodiments, the gas source further comprises a first ball valve 10. The first ball valve 10 is arranged in series on a pipeline between the electric control pressure reducing valve 7 and the gas cylinder group 6 and is used for opening or closing gas supply of the gas cylinder group 6. The first ball valve 10 has the advantages of low price, good sealing performance and the like. The first ball valve 10, the charging valve 62 and the head valve of each high-pressure gas cylinder 61 can be manually operated, and the valves are arranged close to each other, so that the cost is reduced and the operation is convenient. In some embodiments, control may be performed by the data processing platform 3 to improve control accuracy.
In addition, a first pressure gauge 8 and a second pressure gauge 9 can be respectively arranged at two ends of the electrically controlled pressure reducing valve 7. The first pressure gauge 8 may be used to detect and display the pressure value of the gaseous medium before decompression, and the second pressure gauge 9 may be used to detect and display the pressure value of the gaseous medium after decompression. Through the indications of the first pressure gauge 8 and the second pressure gauge 9, the tester can operate each valve in the air source in time, such as the first ball valve 10 or the electrically controlled pressure reducing valve 7.
Referring to fig. 1, in some embodiments, the dry powder spray performance testing apparatus may further include a dry powder outlet tank valve 12 and a second pressure sensor 13. The dry powder tank outlet valve 12 is arranged in series on a pipeline between the outlet end B and the object to be tested and is used for executing the opening and closing of the output of the gas-solid two-phase flow in the dry powder tank 1 and the opening control. The second pressure measuring sensor 13 can be arranged in series on a pipeline between the dry powder tank outlet valve 12 and the object to be tested and is used for detecting the pressure change state of the gas-solid two-phase flow output by the dry powder tank 1. The data processing platform 3 can be in signal connection with the second pressure measuring sensor 13 and the dry powder tank outlet valve 12, and is used for controlling the opening and closing of the dry powder tank outlet valve 12 and the valve opening according to test requirements when different filling conditions of the dry powder tank 1 are simulated, so that the influence of the working condition change of the outlet end B of the dry powder tank 1 on the pressure in a pipeline connected with the outlet end B is analyzed.
referring to fig. 1, in some embodiments, the dry powder blowing performance testing apparatus further comprises: a purge line 14 and a second ball valve 15. The purging pipeline 14 is used for communicating the gas source with the object to be tested. After each injection test is finished, dry powder or other impurities often remain in the pipeline, so that the pipeline can be purged by high-pressure gas provided by a gas source. In other embodiments, other gas sources may be used to purge the lines.
a second ball valve 15 may be arranged in series on the purge line 14 for switching the purge line 14 on or off. The second ball valve 15 may be closed when the test is normally performed. When cleaning is required after the test is finished, the second ball valve 15 can be opened, so that the purging operation of the pipeline is realized.
in order to test the minimum gas volume (i.e. consumption of gaseous medium) required for purging the dry powder fire engine pipeline and the purge pressure-flow relationship with the highest purge efficiency, in some embodiments, the dry powder blowing performance test apparatus may further include a second flow meter 16 serially disposed on the purge pipeline 14. The second flow meter 16 may be used to detect the flow of gaseous medium through the purge line 14. The data processing platform 3 is in signal connection with the second flow meter 16 and is used for acquiring the purge flow detected by the second flow meter 16. Through repeated purging experiments, the purging speed and the required gas amount under different purging conditions are compared, and the method can be used for evaluating and improving the purging pipeline design of the tested dry powder fire truck. In addition, the consumption amount of the gaseous medium in the working process can be obtained by performing an integral operation on the flow rates respectively detected by the first flow meter and the second flow meter.
Referring to fig. 1, in some embodiments, the dry powder canister 1 further comprises: an exhaust end D and a fourth ball valve 18 arranged at the exhaust end D, wherein the fourth ball valve is used for opening or closing the exhaust of the dry powder tank 1. The gaseous medium in the dry powder tank 1 can be discharged by opening the second ball valve 18. In addition, in fig. 1, a third pressure gauge 19 is arranged on a pipeline between the fourth ball valve 18 and the exhaust end D, and is used for detecting and displaying the exhaust pressure of the dry powder tank 1. In order to avoid that the dry powder damages the third pressure gauge 19, a filter is preferably arranged upstream of the detection end of the third pressure gauge 19 to filter out the dry powder in the gaseous medium.
In order to avoid that the pressure of the dry powder tank 1 when filled with the gaseous medium exceeds the permissible pressure, a safety valve 21 can be arranged on the dry powder tank 1. The safety valve 21 can automatically release pressure when the pressure in the dry powder tank exceeds the preset allowable pressure.
To facilitate the use of the dry powder blowing performance test apparatus, in some embodiments, the dry powder blowing performance test apparatus may further include a moving cart 22. The mobile cart 22 may include a body for carrying the dry powder canister 1 and a moving mechanism (wheel set or track) movable relative to the ground. The body of the travelling car 22 may carry, in addition to the dry powder tank 1, a gas source (e.g. a gas cylinder group) and various pipes, etc. In addition, the travelling car may further comprise support legs. The supporting legs are arranged on the vehicle body and can extend downwards relative to the vehicle body so as to abut against the ground. The support legs are preferably located adjacent to each wheel set. By adjusting the downward extending length of the supporting legs, each supporting leg can be tightly connected with the ground, so that the adverse effect of impact possibly generated in the test process on the dry powder blowing performance test device is reduced or eliminated. In other embodiments, the displacement and placement of the dry powder blowing performance test device may be performed by an electric forklift.
By way of illustration of various embodiments of the above-described dry powder blowing performance test apparatus of the present disclosure, embodiments of the dry powder blowing performance test apparatus of the present disclosure include at least one of the following advantages:
1. The weight of the dry powder tank is measured in real time by arranging the weighing sensor, so that the real-time accurate detection of the effective injection rate of the dry powder is realized.
2. Through setting up automatically controlled relief pressure valve, utilize data processing platform's effective control to realize dry powder jar inflation pressure's convenient settlement, can also realize sweeping the convenient settlement of pressure in addition.
3. The monitoring of the whole process of filling, spraying and purging can be effectively realized by arranging measuring elements such as flow meters, pressure measuring sensors and the like of the gas supply pipeline, the gas exhaust pipeline and/or the purging pipeline.
4. The simulation of the dry powder injection system of various fire trucks can be realized by simulating the dry powder blowing state under different filling conditions and measuring the conveying state of the gas-solid two-phase flow, the test difficulty of the dry powder fire truck in the prior art is effectively solved, the simulation device can be used for researching the analysis and optimization of the dry powder fire extinguishing system of the fire truck in three working processes of dry powder filling fluidization, blowing transportation and pipeline cleaning, has important value for the optimization design and function evaluation of the dry powder system of the conventional dry powder fire truck and the elevating fire truck, and can be used as an important test device for optimizing the design or evaluating the efficiency of the dry powder fire extinguishing system of the fire truck.
5. Through signal connection of the data processing platform and each measuring element (such as a weighing sensor, a flowmeter, a pressure sensor and the like), real-time recording of various transmission state parameter indexes of pipeline fluid in the filling process, the spraying process and the blowing process can be realized, and therefore the device can be used as an important research platform for researching gas-solid two-phase flow in the field.
6. The control valves (such as an electric control pressure reducing valve, a tank air inlet valve, a dry powder tank outlet valve and the like) of the related pipelines can be automatically controlled through the data processing platform based on the detection data of the measuring elements so as to meet related filling conditions, and the use is very convenient.
7. Compared with the existing vehicle-mounted complete machine test, the dry powder blowing performance test device disclosed by the invention can assist in realizing repeated spraying tests by a dry powder spraying and collecting system (such as a bag-type dust remover and/or a cyclone dust remover and the like) on the basis of coupling different pipeline research objects, thereby obviously improving the economy.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (13)
1. the utility model provides a dry powder blows performance experimental apparatus which characterized in that includes:
A dry powder tank (1) comprising a first inlet end (A) for connecting a gas source, a second inlet end (C) for connecting a dry powder source and an outlet end (B) for communicating with an object to be tested;
The weighing sensor (2) is arranged below the dry powder tank (1) and is used for weighing the weight of the dry powder tank (1) in real time;
And the data processing platform (3) is in signal connection with the weighing sensor (2) and is used for calculating the real-time effective dry powder spraying rate according to the real-time weighing data of the weighing sensor (2).
2. A dry powder blowing performance test device according to claim 1, characterized by further comprising:
A first flow meter (5) arranged between the dry powder tank (1) and the gas source for detecting the flow of the gaseous medium into the dry powder tank (1);
The data processing platform (3) is in signal connection with the first flow meter (5) and is used for determining whether the dry powder tank (1) reaches a specified gas-solid ratio filling condition or not according to the tank inlet flow detected by the first flow meter (5).
3. A dry powder blowing performance experimental apparatus according to claim 1, wherein the air source comprises:
A gas cylinder group (6) comprising a plurality of inflatable or replaceable high pressure gas cylinders (61) for storing gaseous medium, said gas cylinder group (6) being in communication with a first inlet end (a) of said dry powder tank (1) through a conduit;
The electronic control pressure reducing valve (7) is arranged on a pipeline between the gas cylinder group (6) and the first inlet end (A) in series and used for adjusting the pressure reducing output quantity passing through the electronic control pressure reducing valve (7);
The data processing platform (3) is in signal connection with the electronic control pressure reducing valve (7) and is used for controlling the electronic control pressure reducing valve (7) to simulate the inflation pressure condition of the dry powder tank (1).
4. the experimental device for dry powder blowing performance according to claim 3, wherein a first pressure gauge (8) and a second pressure gauge (9) are respectively arranged at two ends of the electrically controlled pressure reducing valve (7) and are used for detecting and displaying pressure values of the gaseous medium before and after pressure reduction.
5. A dry powder blowing performance experimental apparatus according to claim 3, wherein the air source further comprises:
and the first ball valve (10) is serially arranged on a pipeline between the electric control pressure reducing valve (7) and the gas cylinder group (6) and is used for opening or closing gas supply of the gas cylinder group (6).
6. A dry powder blowing performance test device according to claim 1, characterized by further comprising:
a first pressure sensor (4) arranged at the first inlet end (A) for detecting the inflation pressure in the dry powder tank (1);
a tank air inlet valve (11) which is arranged in series on a pipeline between the air source and the first pressure sensor (4) and is used for executing air inlet opening and closing and opening control of the dry powder tank (1);
The data processing platform (3) is in signal connection with the first pressure measuring sensor (4) and is used for determining the inflation pressure state of the dry powder tank (1) according to the inflation pressure value detected by the first pressure measuring sensor (4), and the data processing platform (3) is in signal connection with a tank air inlet valve (11) and is used for controlling the opening and closing of the tank air inlet valve (11) and the valve opening according to the determined inflation pressure state of the dry powder tank (1).
7. a dry powder blowing performance test device according to claim 1, characterized by further comprising:
The dry powder tank outlet valve (12) is arranged on a pipeline between the outlet end (B) and the object to be tested in series and is used for executing opening and closing of the output of the gas-solid two-phase flow in the dry powder tank (1) and controlling the opening degree;
The second pressure measuring sensor (13) is arranged on a pipeline between the dry powder tank outlet valve (12) and the object to be tested in series and is used for detecting the pressure change state of the gas-solid two-phase flow output by the dry powder tank (1);
the data processing platform (3) is in signal connection with the second pressure measuring sensor (13) and the dry powder tank outlet valve (12) and is used for controlling the opening and closing of the dry powder tank outlet valve (12) and the valve opening according to test requirements when different filling conditions of the dry powder tank (1) are simulated so as to analyze the influence of the working condition change of the outlet end (B) of the dry powder tank (1) on the pressure in a pipeline connected with the outlet end (B).
8. A dry powder blowing performance test device according to claim 1, characterized by further comprising:
a purging pipeline (14) for communicating the gas source with the object to be tested;
And the second ball valve (15) is arranged on the purging pipeline (14) in series and used for enabling the purging pipeline (14) to be communicated or shut off.
9. a dry powder blowing performance test device according to claim 8, further comprising:
A second flow meter (16) arranged in series on the purge line (14) for detecting the flow of gaseous medium through the purge line (14);
Wherein the data processing platform (3) is in signal connection with the second flow meter (16) and is used for collecting the purge flow detected by the second flow meter (16).
10. the dry powder blowing performance experimental apparatus according to claim 1, wherein the dry powder tank (1) further comprises: a third ball valve (17) arranged in series between the second inlet end and the dry powder source, the third ball valve (17) being used to open or close the dry powder filling of the dry powder tank (1).
11. the dry powder blowing performance experimental apparatus according to claim 1, wherein the dry powder tank (1) further comprises: an exhaust end (D) and a fourth ball valve (18) arranged at the exhaust end (D) and used for opening or closing the exhaust of the dry powder tank (1); and a third pressure gauge (19) is arranged on a pipeline between the fourth ball valve (18) and the exhaust end (D) and is used for detecting and displaying the exhaust pressure of the dry powder tank (1).
12. The dry powder blowing performance experimental apparatus according to claim 1, further comprising a moving cart (22), wherein the moving cart (22) comprises: the dry powder tank device comprises a vehicle body for bearing a dry powder tank (1), a moving mechanism capable of moving relative to the ground and supporting legs arranged on the vehicle body, wherein the supporting legs can extend downwards relative to the vehicle body to abut against the ground.
13. A dry powder blowing performance experimental apparatus according to claim 1, wherein the object to be tested includes: a jet pipeline of gas-solid two-phase flow or a fire engine.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110243616A (en) * | 2019-05-13 | 2019-09-17 | 徐工集团工程机械股份有限公司 | Dry powder blows experimental apparatus for capability |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110243616A (en) * | 2019-05-13 | 2019-09-17 | 徐工集团工程机械股份有限公司 | Dry powder blows experimental apparatus for capability |
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