Dry powder spray test device for dry powder fire trucks

Abstract

The present invention discloses a dry powder spray test device for a dry powder fire truck. The dry powder spray test device includes a compartment, multiple dry powder trays, a weighing assembly, and a controller. The controller is configured to: control a dry powder spray mechanism to spray dry powder into a test space; determine the weight of the dry powder on each dry powder tray; determine the maximum value among the multiple weight values; determine the vertical distance between the dry powder tray corresponding to the maximum value and the spray hole on the horizontal plane; and determine the actual range of the dry powder spray mechanism based on the vertical distance. The dry powder spray test device has a simple structure and can quickly and easily determine the actual range of the dry powder spray mechanism without manual measurement and recording. The determined results have high accuracy, and are also conducive to reducing the labor intensity of test personnel and improving test efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of fire fighting, in particular to a dry powder spraying test device for a dry powder fire truck. Background Art

[0002] As a commonly used fire-fighting equipment in the fire-fighting industry, dry powder fire trucks play an important role in handling petrochemical fires. The existing spray test plan for dry powder fire trucks is to spray in the field or in the factory, and determine the actual range of the dry powder fire truck through manual measurement. The measurement process is cumbersome and increases the labor intensity of the test personnel. Summary of the Invention

[0003] The purpose of the present invention is to provide a dry powder spray test device for a dry powder fire truck. The dry powder spray test device for a dry powder fire truck has the advantages of simple structure, reduced labor intensity of test personnel, and convenient for quickly determining the actual range of the dry powder fire truck.

[0004] In order to achieve the above object, the present invention provides a dry powder spray test device for a dry powder fire truck, the dry powder spray test device comprising:

[0005] A box body, wherein a test space is formed inside the box body and a spray hole for a dry powder spraying mechanism of a dry powder fire truck to extend into is formed on the vertical side wall of the box body;

[0006] Multiple dry powder trays are provided at the bottom of the test space and arranged in sequence from front to back along the spraying direction of the dry powder spraying mechanism;

[0007] A weighing component, used for measuring the weight of the dry powder on each dry powder tray;

[0008] The controller is in communication with the dry powder spraying mechanism and the weighing component and is configured to:

[0009] Control the dry powder spraying mechanism to spray dry powder into the test space;

[0010] Determine the weight of dry powder on each dry powder tray;

[0011] determining a maximum value among a plurality of weight values;

[0012] Determine the vertical distance between the dry powder tray and the spray hole on the horizontal plane corresponding to the maximum value;

[0013] Determine the actual range of the dry powder spraying mechanism based on the vertical distance.

[0014] In an embodiment of the present invention, determining the vertical distance between the dry powder tray and the dry powder spraying mechanism on a horizontal plane corresponding to the maximum value includes:

[0015] Determine the placement of the dry powder tray at the bottom of the test space corresponding to the maximum value;

[0016] Determine the vertical distance between the dry powder tray and the spray hole on the horizontal plane corresponding to the maximum value based on the placement position.

[0017] In an embodiment of the present invention, determining the actual range of the dry powder spraying mechanism based on the vertical distance includes:

[0018] Obtain the theoretical range of the dry powder spraying mechanism and the width of the dry powder tray corresponding to the maximum value;

[0019] Determine the initial value of the actual range based on the vertical distance, width value and theoretical range;

[0020] Obtaining the injection error value of the dry powder injection mechanism;

[0021] The actual range is determined based on the actual range initial value and the injection error value.

[0022] In an embodiment of the present invention, a plurality of dry powder trays are movably disposed at the bottom of the test space.

[0023] In an embodiment of the present invention, the plurality of vertical side walls and the top wall of the compartment are all made of transparent material.

[0024] In an embodiment of the present invention, the dry powder spraying test device further includes a recovery system for recovering the dry powder.

[0025] In an embodiment of the present invention, the recovery system comprises:

[0026] The blower is connected to the controller for communication;

[0027] A recovery pipe, one end of which is connected to the first air outlet of the blower, and the other end of which is connected to the first outlet at the bottom of the compartment, and a first switch valve is provided on the recovery pipe;

[0028] A separation cabin is provided on the recovery pipeline, and a second outlet is provided at the bottom of the separation cabin;

[0029] The recovery container is arranged below the separation cabin and is used to collect the dry powder flowing out of the second outlet.

[0030] In an embodiment of the present invention, the recovery system also includes a purge pipe, multiple purge nozzles and a second switch valve. The second switch valve is arranged on the purge pipe and is communicated with the controller. Purge nozzles are distributed on multiple vertical side walls and the top wall. One end of the purge pipe is connected to the second air outlet of the blower, and multiple purge nozzles are connected to the other end of the purge pipe.

[0031] In an embodiment of the present invention, the recovery system further comprises a cleaning member movably disposed inside the test space and communicatively connected to the controller.

[0032] In an embodiment of the present invention, the controller is further configured to:

[0033] After the actual range is determined, the first switch valve, the separation cabin, and the first working mode of the blower are turned on to enable the recovery system to perform a first recovery operation;

[0034] After the first recovery operation is completed, the first on-off valve and the separation cabin are closed, the second on-off valve is opened, and the first working mode of the blower is switched to the second working mode, so that the recovery system performs a purge operation;

[0035] After the purge operation is completed, the second switch valve and the blower are closed, and the cleaning member is turned on to enable the recovery system to perform a powder scraping operation;

[0036] After the powder scraping operation is completed, the cleaning member is closed, and the first switch valve, the separation cabin and the first working mode of the blower are turned on to enable the recovery system to perform the second recovery operation.

[0037] The above technical solution shows that the dry powder spray test device includes a compartment, multiple dry powder trays, a weighing assembly, and a controller. The controller controls the dry powder spray mechanism to spray dry powder into the test space, determines the weight of the dry powder on each dry powder tray, determines the maximum value among the multiple weight values, determines the vertical distance between the dry powder tray corresponding to the maximum value and the spray hole on the horizontal plane, and then determines the actual range of the dry powder spray mechanism based on the vertical distance. This dry powder spray test device has a simple structure and can quickly and easily determine the actual range of the dry powder spray mechanism without manual measurement and recording. The determined results are highly accurate, and it also helps reduce the labor intensity of test personnel and improve test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the embodiments of the present invention, but do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0039] Figure 1 Schematic diagram of the dry powder spray test device according to an embodiment of the present invention;

[0040] Figure 2 2. It is a schematic diagram of the partial composition of the dry powder spray test device according to an embodiment of the present invention;

[0041] Figure 3 2 is a schematic diagram of the front vertical side wall of the vehicle body according to an embodiment of the present invention;

[0042] Figure 4 Schematic diagram of the rear vertical side wall of the vehicle body in an embodiment of the present invention;

[0043] Figure 5 2 is a schematic diagram of the top wall of the compartment in an embodiment of the present invention;

[0044] Figure 6 Schematic top view of the test space in the embodiment of the present invention.

[0045] Description of Reference Numerals

[0046] 1- compartment; 101- spray hole; 102- test space; 103- suction slot; 104- front vertical side wall; 105- rear vertical side wall; 106- top wall; 2- dry powder fire truck; 201- dry powder spray mechanism; 3- dry powder tray; 301- first dry powder tray; 302- second dry powder tray; 303- third dry powder tray; 4- weighing assembly; 5- controller; 6- recovery system; 601- blower; 602- recovery pipe; 603- separation cabin; 604- recovery container; 605- purge pipe; 606- purge nozzle; 607- second switch valve; 608- cleaning parts; 609- dust removal system; 6010- vacuum gauge; 6011- silencer; 7- transparent pipe; 8- maintenance door. DETAILED DESCRIPTION

[0047] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0048] The embodiment of the present invention provides a dry powder spraying test device for a dry powder fire truck, such as Figures 1-6 As shown, the dry powder spray test device includes:

[0049] The compartment 1 has a test space 102 formed therein and a spray hole 101 formed on a vertical side wall of the compartment 1 for the dry powder spraying mechanism 201 of the dry powder fire truck 2 to extend therein;

[0050] Multiple dry powder trays 3 are provided at the bottom of the test space 102 and arranged in sequence from front to back along the spraying direction of the dry powder spraying mechanism 201;

[0051] A weighing component 4 is used to measure the weight of the dry powder on each dry powder tray 3;

[0052] The controller 5 is in communication with the dry powder spraying mechanism 201 and the weighing assembly 4 and is configured to perform the following steps:

[0053] Step S101: controlling the dry powder spraying mechanism 201 to spray dry powder into the test space 102;

[0054] Step S102: determining the weight of the dry powder on each dry powder tray 3;

[0055] Step S103: determining the maximum value among the multiple weight values;

[0056] Step S104: determining the vertical distance between the dry powder tray 3 and the spray hole 101 on the horizontal plane corresponding to the maximum value;

[0057] Step S105: determining the actual range of the dry powder spraying mechanism 201 according to the vertical distance.

[0058] Specifically, the dry powder spraying test device in this embodiment is suitable for dry powder fire trucks. The dry powder fire truck 2 is provided with a dry powder spraying mechanism 201 for spraying dry powder. The dry powder spraying mechanism 201 has a theoretical range when it is designed, but in actual use, due to the influence of installation or environmental factors, the actual range and the theoretical range are inconsistent. It is necessary to test it to determine the actual range to avoid affecting the actual use effect of the dry powder spraying mechanism 201 and the dry powder fire truck 2. Furthermore, the spray hole 101 is set on the rear vertical wall 105 of the car body 1. When a spraying test is required, the staff moves the dry powder fire truck 2 to the rear side of the car body 1 and extends the dry powder spraying mechanism 201 into the spray hole 101. , then the controller 5 sends a control instruction to the dry powder spraying mechanism 201 (the dry powder fire truck 2 in this embodiment is also provided with a wireless control module that is wirelessly connected to the controller 5 and the dry powder spraying mechanism 201. The controller 5 first sends the control command to the wireless control module, and the wireless control module then sends the control command to the dry powder spraying mechanism 201), so that the dry powder spraying mechanism 201 sprays dry powder into the test space 102 for testing. The test space 102 is in a closed state during the test to prevent dry powder from scattering and polluting the environment. After the dry powder spraying is completed, the tester controls the dry powder spraying mechanism 201 to remove the spray hole 101, and then moves the dry powder fire truck 2 to another location;

[0059] The weighing assembly 4 in this embodiment includes a plurality of gravity sensors electrically connected to the controller 5. The plurality of gravity sensors are arranged one by one under the plurality of dry powder trays 3 (in this embodiment, at least 2 / 3 of the total number of dry powder trays 3 are within the range of the dry powder spraying mechanism 201). After the dry powder is sprayed, it will be scattered on the plurality of dry powder trays 3 along the spraying direction. Each gravity sensor will measure the weight of the dry powder scattered on each dry powder tray 3. After the measurement is completed, the weight value of the dry powder on each dry powder tray 3 is sent to the controller 5. The controller 5 compares the received gravity values to determine the maximum of the plurality of weight values. maximum value; multiple dry powder trays 3 are arranged in sequence from front to back along the injection direction of the dry powder injection mechanism 201, and the controller 5 can determine the vertical distance between each dry powder tray 3 and the injection hole 101 on the horizontal plane after the multiple dry powder trays 3 are arranged (the vertical distance in this embodiment refers to the vertical distance between the end face of the dry powder tray 3 close to the injection hole 101 and the injection hole 101 on the horizontal plane); after determining the maximum value, the controller 5 further determines the dry powder tray 3 corresponding to the maximum value, and the vertical distance between the dry powder tray 3 and the injection hole 101 on the horizontal plane, and then determines the actual range of the dry powder injection mechanism 201 according to the vertical distance.

[0060] The dry powder spray test device in this embodiment has a simple structure and can quickly and easily determine the actual range of the dry powder spray mechanism 201 without manual measurement and recording. The determined result has high accuracy and is beneficial to reducing the labor intensity of test personnel and improving test efficiency.

[0061] In one embodiment of the present invention, step S104: determining the vertical distance between the dry powder tray 3 and the spray hole 101 on the horizontal plane corresponding to the maximum value further includes steps S201 and S202, wherein:

[0062] Step S201: determining the placement position of the dry powder tray 3 corresponding to the maximum value at the bottom of the test space 102;

[0063] Step S202: determining the vertical distance between the dry powder tray 3 and the spray hole 101 on the horizontal plane corresponding to the maximum value according to the placement position.

[0064] Specifically, in each test, after each dry powder tray 3 is arranged, its placement position at the bottom of the test space 102 is fixed, and the placement position can be measured and determined by the test personnel, and then the measured placement position is manually uploaded to the controller 5; alternatively, a position sensor is set on each dry powder tray 3 and communicates with the controller 5 to automatically measure the placement position of the dry powder tray 3 at the bottom of the test space 102 and send the measured placement position to the controller 5; after determining the maximum value, the controller 5 can retrieve the placement position of the dry powder tray 3 at the bottom of the test space 102 corresponding to the maximum value; further, after determining the placement position of the dry powder tray 3 at the bottom of the test space 102 corresponding to the maximum value, the controller 5 can retrieve the position parameters of the injection hole 101 and determine the vertical distance between the dry powder tray 3 corresponding to the maximum value and the injection hole 101 on the horizontal plane based on the placement position and the position parameters.

[0065] In one embodiment of the present invention, step S105: determining the actual range of the dry powder spraying mechanism 201 based on the vertical distance further includes steps S301 to S304, wherein:

[0066] Step S301: Obtaining the theoretical range of the dry powder spraying mechanism 201 and the width of the dry powder tray 3 corresponding to the maximum value;

[0067] Step S302: determining an initial value of the actual range based on the vertical distance, the width value, and the theoretical range;

[0068] Step S303: obtaining the injection error value of the dry powder injection mechanism 201;

[0069] Step S304: determining the actual range according to the actual range initial value and the injection error value.

[0070] Specifically, in this embodiment, the theoretical range of the dry powder spraying mechanism 201 and the width value of the dry powder tray 3 corresponding to the maximum value are pre-stored in the controller 5 and can be retrieved when needed; when determining the initial value of the actual range, the controller 5 first calculates the absolute value of the difference between the vertical distance and the theoretical range, which is a first absolute value; then calculates the sum of the vertical distance and the width value, and then calculates the absolute value of the difference between the above sum and the theoretical range, which is a second absolute value; finally, the first absolute value and the second absolute value are compared. If the first absolute value is less than the second absolute value, then the initial value of the actual range is determined to be the vertical distance; if the first absolute value is greater than or equal to the second absolute value, then the actual range is determined to be the vertical distance. For the values, the actual range initial value is determined to be the sum of the vertical distance and the width value. For example, the vertical distance is 35m, the theoretical range is 40m, and the width value is 20m. The first absolute value is calculated to be 5m and the second absolute value is 15m. In this case, the actual range initial value is 35m; the injection error value of the dry powder injection mechanism 201 is pre-stored in the controller 5 and can be retrieved when needed. In this embodiment, the injection error value is 2m; after determining the actual range initial value and the injection error value, the actual range range can be calculated. The actual range range is the actual range initial value ± the injection error value. In this embodiment, the actual range range is 33m-37m.

[0071] In one embodiment of the present invention, multiple dry powder trays 3 are movably disposed at the bottom of the test space 102. Specifically, in this embodiment, there are three dry powder trays 3. The three dry powder trays 3, each with the same width, include a first dry powder tray 301, a second dry powder tray 302, and a third dry powder tray 303, arranged sequentially from front to back along the spraying direction (in this embodiment, the number of gravity sensors is the same as the number of dry powder trays 3). Each dry powder tray 3 is provided with a movable base that is communicatively connected to the controller 5 below. This facilitates conveniently changing the placement of the dry powder tray 3 in the test space 102, improves the convenience of the test, and helps expand the test range of the dry powder spray test device. Furthermore, the number of dry powder trays 3 is not limited to three, but can also be four, five, or more. When the number of dry powder trays 3 changes, the number of gravity sensors and the number of movable bases also change accordingly. In addition, the widths of the dry powder trays 3 can be the same or different.

[0072] In one embodiment of the present invention, the multiple vertical side walls and top wall 106 of the compartment 1 are made of a transparent material. Specifically, the multiple vertical side walls of the compartment 1 include the front vertical side wall 104, the rear vertical side wall 105, the left vertical side wall, and the right vertical side wall. The transparent material includes, but is not limited to, tempered glass or acrylic. This structural design facilitates the test personnel to quickly and conveniently observe the test conditions within the compartment 1.

[0073] In one embodiment of the present invention, the dry powder spraying test device further includes a recovery system 6 for recovering the dry powder, which can effectively reduce the test cost.

[0074] In one embodiment of the present invention, the recovery system 6 includes a blower 601, a recovery pipe 602, a recovery pipe 602, a separation cabin 603 and a recovery container 604, wherein the blower 601 is communicatively connected to the controller 5, one end of the recovery pipe 602 is connected to the first air outlet of the blower 601, and the other end of the recovery pipe 602 is connected to the first outlet at the bottom of the compartment 1, and a first switch valve (not shown in the figure) is provided on the recovery pipe 602; the separation cabin 603 is provided on the recovery pipe 602, and a second outlet is provided at the bottom of the separation cabin 603; the recovery container 604 is provided below the separation cabin 603 and is used to collect the dry powder flowing out from the second outlet. Specifically, after the spray test is completed, the tester controls the first switch valve, the blower 601 and the separation cabin 603 to open through the controller 5, the recovery pipe 602 is turned on, the blower 601 is in the first working mode and sucks the air in the test space 102 through the recovery pipe 602 to form a negative pressure environment in the test space 102, so that the dry powder therein is sucked into the recovery pipe 602 through the first outlet, and then the dry powder enters the separation cabin 603 through the recovery pipe 602, and the separation cabin 603 separates the air and dry powder entering therein; a discharger is provided at the bottom of the separation cabin 603, and the second outlet is set on the discharger, and the recovery container 604 is located below the discharger. After the separation is completed, the dry powder enters the discharger and then flows into the recovery container 604 through the second outlet on the discharger; the air after separation continues to flow to the blower 601 through the recovery pipe 602, and then is discharged into the outside atmosphere through the air outlet on the blower 601. The above recovery operation is the first recovery operation. Furthermore, the recovery system 6 also includes a dust removal system 609 and a vacuum meter 6010 arranged on the recovery pipe 602, which are used to remove dust and purify the air to be discharged into the outside atmosphere to avoid air pollution; the dust removal system 609 is located between the blower 601 and the separation cabin 603, and the vacuum meter 6010 is located between the blower 601 and the dust removal system 609, and is used to measure the air pressure on the pipe in which it is located; the blower 601 is also provided with a muffler 6011, which is used to reduce the noise of the blower 601 when it is working.

[0075] In one embodiment of the present invention, a plurality of movable wheels are provided at the bottom of the recovery container 604 to facilitate the experimenter to apply force to the recovery container 604 to improve the convenience of transporting the recovered dry powder.

[0076] In one embodiment of the present invention, at least a portion of the recovery pipe 602 located between the separation cabin 603 and the compartment 1 is a transparent pipe 7, which allows test personnel to conveniently and quickly observe the flow conditions of the dry powder therein.

[0077] In one embodiment of the present invention, the compartment 1 is further provided with an openable and closable inspection door 8. When the inspection door 8 is opened, maintenance personnel can enter the compartment 1 to inspect the components therein.

[0078] In one embodiment of the present invention, the recovery system 6 also includes a purge pipe 605, multiple purge nozzles 606 and a second switch valve 607. The second switch valve 607 is arranged on the purge pipe 605 and is communicated with the controller 5. Purge nozzles 606 are distributed on multiple vertical side walls and the top wall 106. One end of the purge pipe 605 is connected to the second air outlet of the blower 601, and multiple purge nozzles 606 are connected to the other end of the purge pipe 605. Specifically, multiple purge nozzles 606 are arranged in a staggered and inclined manner, which is conducive to further improving the purge effect in the test space 102; after the first recovery operation is completed, there may still be dry powder that has not been completely recovered on the inner wall of the compartment 1. At this time, it is necessary to use a purge operation to blow the dry powder remaining on the inner wall of the compartment 1 to the bottom of the compartment 1 (that is, each dry powder tray 3), that is, the controller 5 stops executing the first recovery operation, opens the second switch valve 607 and switches the working mode of the blower 601 to the second working mode to connect the purge pipe 605, and the blower 601 sprays jet flow toward the inner wall of the compartment 1 through the purge pipe 605, and the airflow then blows the dry powder remaining on the inner wall of the compartment 1 to the bottom of the compartment 1.

[0079] In one embodiment of the present invention, the recovery system 6 further includes a cleaning member 608 that is movably disposed inside the test space 102 and is in communication with the controller 5. A suction groove 103 is also provided at the bottom of the compartment 1, and the first outlet is located at the bottom of the suction groove 103; the cleaning member 608 includes a base, a plurality of movable rods connected in sequence, and a brush head provided at the movable end. The base is fixed on a vertical plate inside the compartment 1, and the plurality of movable rods cooperate with each other to realize the movement of the brush head. Specifically, after the purging operation is completed, the controller 5 controls the cleaning member 608 to perform a powder scraping operation to push the residual dry powder scattered on the plurality of dry powder trays 3 (in this embodiment, the dry powder trays 3 are flat) after the purging operation into the suction groove 103, which is conducive to further improving the effect of dry powder recovery.

[0080] In one embodiment of the present invention, the controller 5 is further configured to perform the following operations:

[0081] Step S401: After the actual range is determined, the first on-off valve, the separation cabin 603 and the blower 601 are opened to enable the recovery system 6 to perform a first recovery operation;

[0082] Step S402: After the first recovery operation is completed, the first on-off valve and the separation cabin 603 are closed, the second on-off valve 607 is opened, and the working mode of the blower 601 is switched to enable the recovery system 6 to perform a purge operation;

[0083] Step S403: After the purge operation is completed, the second on-off valve 607 and the blower 601 are closed, and the cleaning member 608 is turned on to enable the recovery system 6 to perform a powder scraping operation;

[0084] Step S404: After the powder scraping operation is completed, the cleaning member 608 is closed, and the first switch valve, the separation cabin 603 and the first working mode of the blower 601 are turned on to enable the recovery system 6 to perform the second recovery operation.

[0085] After the actual range is determined, the dry powder after the test needs to be recovered and reused in order to reduce the test cost. Specifically, the first recovery operation is performed first. The controller 5 controls the first switch valve, the blower 601 and the separation cabin 603 to open, the recovery pipe 602 is connected, the blower 601 is in the first working mode and sucks the air in the test space 102 through the recovery pipe 602 to form a negative pressure environment in the test space 102, thereby causing the dry powder therein to be sucked into the recovery pipe 602 through the first outlet. Thereafter, the dry powder enters the separation cabin 603 through the recovery pipe 602, and the separation cabin 603 separates the air and dry powder entering therein; after separation, the dry powder enters the discharger and then flows into the recovery container 604 through the second outlet on the discharger; after separation, the air continues to flow to the blower 601 through the recovery pipe 602 and then is discharged into the outside atmosphere through the air outlet on the blower 601;

[0086] After the first preset time, the first recovery operation is completed, and the controller 5 closes the first on-off valve and the separation cabin 603. Then, the second on-off valve 607 is opened and the working mode of the blower 601 is switched to perform a purge operation. That is, the purge pipe 605 is opened, and the blower 601 sprays air through the purge pipe 605 toward the inner wall of the compartment 1. The airflow then blows the dry powder remaining on the inner wall of the compartment 1 to the bottom of the compartment 1.

[0087] After the second preset time, the purge operation is completed, and the controller 5 closes the second on-off valve 607 and the blower 601; the cleaning member 608 is turned on to cause the recovery system 6 to perform a powder scraping operation, pushing the residual dry powder scattered on the multiple dry powder trays 3 after the purge operation into the suction tank 103;

[0088] After the second preset time, the powder scraping operation is completed, the cleaning part 608 of the controller 5 is closed, and the first switch valve, the separation cabin 603 and the blower 601 are reopened to form a negative pressure environment in the test space 102 again, so that the dry powder therein is sucked into the recovery pipe 602 through the first outlet, and then separated to obtain dry powder. The separated dry powder then flows into the recovery container 604 for recovery, and the separated air is discharged into the outside atmosphere.

[0089] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention may be subjected to various simple modifications, including combining the specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

[0090] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0091] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0092] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A dry powder spray test device for a dry powder fire truck, characterized in that: The dry powder spray test device comprises: A compartment (1), wherein a test space (102) is formed inside the compartment (1) and a spray hole (101) for a dry powder spray mechanism (201) of a dry powder fire truck (2) to extend therethrough is formed on a vertical side wall of the compartment (1); A plurality of dry powder trays (3) are all provided at the bottom of the test space (102) and are arranged in sequence from front to back along the spraying direction of the dry powder spraying mechanism (201); a weighing assembly (4) for measuring the weight of the dry powder on each of the dry powder trays (3); The controller (5) is in communication with the dry powder spraying mechanism (201) and the weighing assembly (4) and is configured to: controlling the dry powder spraying mechanism (201) to spray the dry powder into the test space (102); Determining the weight of the dry powder on each of the dry powder trays (3); determining a maximum value among a plurality of said weight values; Determining the vertical distance between the dry powder tray (3) and the spray hole (101) on a horizontal plane corresponding to the maximum value; The actual range of the dry powder spraying mechanism (201) is determined according to the vertical distance.

2. The dry powder spraying test device for a dry powder fire truck according to claim 1, characterized in that: Determining the vertical distance between the dry powder tray (3) and the spray hole (101) on a horizontal plane corresponding to the maximum value includes: Determining the placement position of the dry powder tray (3) at the bottom of the test space (102) corresponding to the maximum value; The vertical distance between the dry powder tray (3) and the spray hole (101) on the horizontal plane corresponding to the maximum value is determined according to the placement position.

3. The dry powder spraying test device for a dry powder fire truck according to claim 2, characterized in that: Determining the actual range of the dry powder spraying mechanism (201) based on the vertical distance includes: Obtaining the theoretical range of the dry powder spraying mechanism (201) and the width value of the dry powder tray (3) corresponding to the maximum value; Determine an initial value of an actual range according to the vertical distance, the width value and the theoretical range; Obtaining an injection error value of the dry powder injection mechanism (201); The actual range is determined according to the actual range initial value and the injection error value.

4. The dry powder spraying test device for a dry powder fire truck according to claim 1, characterized in that: The plurality of dry powder trays (3) are movably arranged at the bottom of the test space (102).

5. The dry powder spraying test device for a dry powder fire truck according to any one of claims 1 to 4, characterized in that: The multiple vertical side walls and the top wall (106) of the compartment (1) are all made of transparent material.

6. The dry powder spraying test device for a dry powder fire truck according to claim 5, characterized in that: The dry powder spraying test device further comprises a recovery system (6) for recovering the dry powder.

7. The dry powder spraying test device for a dry powder fire truck according to claim 6, characterized in that: The recovery system (6) comprises: A blower (601) is in communication with the controller (5); a recovery pipe (602), one end of the recovery pipe (602) being connected to the first air outlet of the blower (601), the other end of the recovery pipe (602) being connected to the first outlet at the bottom of the compartment (1), and a first switch valve being provided on the recovery pipe (602); A separation cabin (603) is provided on the recovery pipe (602), and a second outlet is provided at the bottom of the separation cabin (603); A recovery container (604) is provided below the separation cabin (603) and is used to collect the dry powder flowing out of the second outlet.

8. The dry powder spraying test device for a dry powder fire truck according to claim 7, characterized in that: The recovery system (6) further comprises a purge pipe (605), a plurality of purge nozzles (606) and a second switch valve (607), wherein the second switch valve (607) is arranged on the purge pipe (605) and is communicatively connected to the controller (5), the purge nozzles (606) are distributed on the plurality of vertical side walls and the top wall, one end of the purge pipe (605) is connected to the second air outlet of the blower (601), and the plurality of purge nozzles (606) are connected to the other end of the purge pipe (605).

9. The dry powder spraying test device for a dry powder fire truck according to claim 8, characterized in that: The recovery system (6) further includes a cleaning member (608) movably disposed inside the test space (102) and in communication with the controller (5).

10. The dry powder spraying test device for a dry powder fire truck according to claim 9, characterized in that: The controller (5) is further configured to: After the actual range is determined, the first switch valve, the separation cabin (603) and the first working mode of the blower (601) are turned on to enable the recovery system (6) to perform a first recovery operation; After the first recovery operation is completed, the first on-off valve and the separation cabin (603) are closed, the second on-off valve (607) is opened, and the first operating mode of the blower (601) is switched to the second operating mode, so that the recovery system (6) performs a purge operation; After the purging operation is completed, the second on-off valve (607) and the blower (601) are closed, and the cleaning member (608) is opened to enable the recovery system (6) to perform a powder scraping operation; After the powder scraping operation is completed, the cleaning member (608) is closed, and the first switching valve, the separation cabin (603) and the first working mode of the blower (601) are opened to enable the recovery system (6) to perform a second recovery operation.

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