Sand control test apparatus, method, system

Abstract

This invention provides a sand control testing device, method, and system. The device includes: a sand chamber, with a diffuser fan installed at the sand spray inlet at a first end of the sand chamber; a second end of the sand chamber opposite to the first end; the diffuser fan generating airflow from the first end to the second end in a first direction; a return channel starting at the second end and ending at the first end; the return channel guiding the airflow to the first end to form a loop; a filter module disposed on the side wall of the sand chamber; a sand spray nozzle, one end of which is located at the sand spray inlet, and the other end of which is connected to an air inlet outside the sand chamber; and a sand injector, the bottom of which is connected to the air inlet via a regulating valve. Through the design of the filter module and the airflow loop, the uniform distribution of sand is enhanced, improving the sand dispersion effect.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle technology, and in particular to a sand-proof testing device, method, and system. Background Technology

[0002] For vehicles operating in windy and sandy areas, air conditioning equipment needs to have good sand-proof performance. However, there is currently no equipment or method to test and confirm the unit design during the design and prototype manufacturing processes. To ensure the sand-proof performance of air conditioning equipment and its technical compliance, there is an urgent need for a method that can preliminarily confirm the sand-proof performance during the design and prototype manufacturing stages.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the general background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a sand control testing device, method, and system.

[0005] The present invention provides a sand control testing device, the device comprising:

[0006] A sand and dust chamber is provided with a diffuser fan at the sand spraying inlet at the first end of the sand and dust chamber. The second end of the sand and dust chamber is opposite to the first end. The diffuser fan generates an airflow in a first direction from the first end to the second end. The second end is provided with the starting end of a return channel. The end end of the return channel is located at the first end. The return channel guides the airflow to the first end to form a loop.

[0007] A filter module is installed on the side wall of the dust chamber to maintain the air pressure inside the dust chamber.

[0008] A sand spray nozzle, one end of which is disposed at the sand spray inlet and faces the interior of the sand chamber, and the other end of which is connected to the air inlet outside the sand chamber;

[0009] The bottom of the sand injector is connected to the air inlet via a regulating valve.

[0010] According to a sand-proof testing device provided by the present invention, the filtration module includes multiple layers of filters arranged sequentially along the first direction, wherein the resistance of each layer of the filter to airflow increases sequentially along the first direction.

[0011] According to the sand-proof testing device provided by the present invention, the multi-layer filter is divided into three layers, which are sequentially included along the first direction as follows:

[0012] A first filter with a honeycomb-shaped perforated structure is used to ensure the dust dispersion of the dust chamber;

[0013] Dust-blocking walls with dispersed, perforated structures are used to settle large particles of sand and dust.

[0014] A second filter with high air resistance is used to filter out fine dust particles before releasing the air into the atmosphere.

[0015] According to a sand control test device provided by the present invention, an auxiliary fan is further provided at the second end, and the auxiliary fan is located upstream of the starting end of the return channel in the first direction.

[0016] According to the present invention, a sand control testing device further includes:

[0017] A return sand box is located below the sand injector, and a flow meter is installed in the return sand box;

[0018] A controller, which is connected to the flow meter and the regulating valve.

[0019] According to the present invention, a sand control testing device further includes:

[0020] A gas sampler, connected to the controller, is used to collect the sand content in the air inside the dust chamber.

[0021] According to the present invention, a sand control testing device further includes:

[0022] A variable frequency air compressor, wherein the variable frequency air compressor is connected to the air inlet via an air delivery pipe.

[0023] This invention also provides a sand control test method, the method comprising:

[0024] Data from the regulating valve of the sand injector is obtained and combined with the power of the air compressor to form sand injection information;

[0025] Data from the flow meter of the sand return chamber is acquired to generate sand return information;

[0026] Obtain the required information on air dust content and dust chamber volume for the experiment;

[0027] Based on the information on air sand content, sand chamber volume, sand injection, and sand return, the sand injection time before the start of the sand control test is calculated.

[0028] According to a sand control test method provided by the present invention, the method further includes:

[0029] Obtain indoor dust content information collected by a gas sampler;

[0030] Determine whether the dust content information in the dust chamber meets the requirements of the air dust content information required for the test. If it meets the requirements, start the sand control test; if it does not meet the requirements, continue sand injection.

[0031] According to the present invention, a sand-proof test method is provided, which is used to test the sand-proof performance of the air conditioning unit of a rail vehicle.

[0032] The present invention also discloses a sand control testing system, the system comprising:

[0033] The first acquisition module is used to acquire data from the regulating valve of the sand injector and combine it with the power of the air compressor to form sand injection information;

[0034] The second acquisition module is used to acquire data from the flow meter of the sand return box to form sand return information;

[0035] The third acquisition module is used to acquire information on air sand content and dust chamber volume required for the experiment.

[0036] The calculation module is used to calculate the sand injection time before the start of the sand control test based on the air sand content information, sand chamber volume information, sand injection information, and sand return information.

[0037] The sand control test device, method, and system provided by this invention enhance the uniform distribution of sand and dust and improve the sand and dust dispersion effect through the design of the filter module and airflow circuit. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 A schematic diagram of a sand control test device provided by the present invention;

[0040] Figure 2 A schematic flowchart of a sand control test method also provided by the present invention;

[0041] Figure 3 A schematic flowchart of another sand control test method provided by the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of a sand control test system provided by the present invention;

[0043] Figure 5This is a schematic diagram of the physical structure of an electronic device provided by the present invention.

[0044] Attached reference numerals: 1-Variable frequency air compressor; 2-Controller; 3-Return sand box; 4-Air inlet; 5-Sand injector; 6-Sand spray nozzle; 7-Diffuser fan; 8-Air conditioning unit; 9-Auxiliary fan; 10-Gas sampler; 11-Dust chamber; 12-Return channel; 13-First filter; 14-Second filter; 15-Dust barrier wall. Detailed Implementation

[0045] The advantages of the present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments.

[0046] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0047] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0048] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0049] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0051] In the following description, suffixes such as "module," "part," or "unit" used to denote elements are used only for the convenience of the description of the invention and have no specific meaning in themselves. Therefore, "module" and "part" can be used interchangeably.

[0052] The sand control test device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0053] Figure 1 This is a schematic diagram of a sand control test device provided by the present invention, as shown below. Figure 1 As shown, the present invention provides a sand control test device. It should be noted that an air conditioning unit 8 to be tested is installed inside the sand and dust chamber. The air conditioning unit is used by a rail vehicle, which needs to pass through sand and dusty areas. The device includes:

[0054] The sand chamber 11 has a diffuser fan 7 installed at the sand spraying inlet at the first end of the sand chamber. The second end of the sand chamber is opposite to the first end. The diffuser fan forms an airflow in the first direction from the first end to the second end. The second end is provided with the starting end of the return channel 12. The end of the return channel is located at the first end. The return channel guides the airflow to the first end to form a loop.

[0055] The filter module is installed on the side wall of the dust chamber to maintain the air pressure inside the dust chamber.

[0056] The sand spray nozzle 6 has one end set at the sand spray inlet, facing the inside of the sand chamber, and the other end of the sand spray nozzle is connected to the air inlet 4 outside the sand chamber.

[0057] Sand injector 5, the bottom of the sand injector is connected to the air inlet through a regulating valve. Preferably, the upper part of the sand injector is a barrel-shaped structure and the lower part is a funnel-shaped structure, which facilitates the rapid descent of sand and dust by gravity. Then, the high-pressure air introduced by the air supply pipe carries away the sand and dust. The sand injector is equipped with a regulating valve, which can match the sand flow rate with the air flow rate according to the sand content in the air in the actual line survey to achieve a sand flow rate that is more consistent with the actual situation.

[0058] Preferably, the spray nozzle is funnel-shaped, which can fully homogenize the sprayed sand-laden air and ensure the effectiveness of the test.

[0059] Optionally, the filtration module includes multiple layers of filters arranged sequentially along a first direction, wherein the resistance to airflow of each filter layer increases sequentially along the first direction.

[0060] Optionally, the multilayer filter consists of three layers, which are sequentially arranged along the first direction as follows:

[0061] The first filter 13, which has a honeycomb-shaped perforated structure, is used to ensure the dust dispersion in the dust chamber;

[0062] The dust-blocking wall 15 has a dispersed, hollow structure and is used to settle large particles of sand and dust.

[0063] A second filter 14 with high air resistance is used to filter out fine dust particles before discharging the air into the atmosphere.

[0064] It should be noted that the first filter is a low-resistance filter to ensure the dispersion of sand and dust in the sand and dust chamber, and a dust-blocking wall is set at the rear end (the dust-blocking wall has a low-density perforated structure to reduce the wind pressure on the dust-blocking wall and prevent structural damage) to settle larger sand and dust particles. After passing through the second filter, the sand and dust in the air are effectively filtered and discharged into the atmosphere to avoid pollution.

[0065] Optionally, an auxiliary fan 9 is also provided at the second end, which is located upstream of the starting end of the return channel in the first direction.

[0066] Optionally, the device further includes:

[0067] Return sand box 3 is located below the sand injector and contains a flow meter.

[0068] Controller 2 is connected to the flow meter and regulating valve.

[0069] It should be noted that a sand return box is set up to recover the sample sand flowing out of the sand injector, and a flow meter is set up to work in conjunction with the regulating valve of the sand injector to ensure the sand flow rate and improve the accuracy of the verification.

[0070] Optionally, the device further includes:

[0071] Gas sampler 10, which is connected to the controller, is used to collect the sand content in the air inside the dust chamber.

[0072] Optionally, the device further includes:

[0073] Variable frequency air compressor 1, the variable frequency air compressor is connected to the air inlet through the air delivery pipe. The air compressor connected to the air delivery pipe provides high-pressure airflow to the whole unit. The use of variable frequency air compressor can simulate air flow under multiple operating conditions, providing multi-condition verification conditions for air conditioning unit.

[0074] In this embodiment, the sand and dust ejected from the spray nozzle are enhanced by the flow rate and uniform distribution of the sand and dust through the diffuser fan and auxiliary fan, thereby improving the sand and dust dispersion effect.

[0075] Figure 2 This invention also provides a schematic flowchart of a sand control test method, as shown below. Figure 2 As shown, the present invention also provides a sand control test method, which includes the following steps.

[0076] S100: Obtain the data from the regulating valve of the sand injector and combine it with the power of the air compressor to form sand injection information.

[0077] S200: Obtain data from the flow meter of the sand return box to generate sand return information.

[0078] S300: Obtain the required information on air sand content and dust chamber volume for the experiment.

[0079] S400: Based on air sand content information, dust chamber volume information, sand injection information, and sand return information, calculate the sand injection time before the start of the sand control test.

[0080] Preferably, the method is implemented by a controller.

[0081] Preferably, the method is used to test the sand-proof performance of the air conditioning unit of a rail vehicle.

[0082] Optionally, the method further includes:

[0083] Obtain indoor dust content information collected by a gas sampler;

[0084] Determine whether the dust content information in the dust chamber meets the requirements of the air dust content information needed for the test. If it meets the requirements, start the sand control test; if it does not meet the requirements, continue the sand injection.

[0085] Preferably, Figure 3 This is a schematic flowchart of another sand control test method provided by the present invention, as shown below. Figure 3 As shown, an interlocking control is achieved through the controller: the diffuser fan and auxiliary fan are started first, then the air compressor is started, and finally the regulating valve in the sand injector is opened, and the flow rate is controlled according to the sand return situation in the sand return box;

[0086] Furthermore, the operating frequency of the variable frequency air compressor, the opening degree of the sand injector regulating valve, and the continuous operating time are determined as follows:

[0087] The volume of the dust chamber is determined by the dust content, assuming it is Vm. 3 The airborne sand content in the vehicle's operating environment is n1g / m³. 3 (Ignoring losses, at least V·n1g of dust is required), if the dust content in the air ejected from the nozzle is n2g / m3 And under this operating condition, the compressor's discharge capacity is V1m 3 If the sand flow rate in the sand injection box is V1·n2g / s, then the compressor needs to run continuously for V·n1 / (V1·n2)s to ensure the sand content in the sand chamber. The sand control test for the air conditioning unit must also be conducted at least after V·n1 / (V1·n2)s. It should be noted that the above-mentioned operating time determination does not consider sand return information.

[0088] Furthermore, after the dust content in the dust chamber meets the test requirements, the air conditioning unit is turned on for testing, and dust samples are taken in stages during the test to ensure that the dust content in the air in the dust chamber meets the requirements.

[0089] Furthermore, dust sampling: Before and during the test, the air in the dust chamber needs to be sampled and compared with the dust content required by the test. Combined with the dust attenuation rate (the attenuation rate is obtained in advance through a large number of tests), the operating frequency of the air compressor and the opening of the sand injector regulating valve are adjusted in real time to ensure that the dust content in the dust chamber is in dynamic equilibrium.

[0090] This embodiment calculates the actual sand injection efficiency by integrating sand return information and sand injection information, thereby accurately determining the sand injection time before the start of the sand control test.

[0091] The sand control test system provided by the present invention is described below. The sand control test system described below can be referred to in correspondence with the sand control test method described above.

[0092] Figure 4 This is a schematic diagram of the structure of a sand control test system provided by the present invention, as shown below. Figure 4 As shown, a sand control testing system includes:

[0093] The first acquisition module is used to acquire data from the regulating valve of the sand injector and combine it with the power of the air compressor to form sand injection information;

[0094] The second acquisition module is used to acquire data from the flow meter of the sand return box to form sand return information;

[0095] The third acquisition module is used to acquire information on air sand content and dust chamber volume required for the experiment.

[0096] The calculation module is used to calculate the sand injection time before the start of the sand control test based on the air sand content information, sand chamber volume information, sand injection information, and sand return information.

[0097] This embodiment calculates the actual sand injection efficiency by integrating sand return information and sand injection information, thereby accurately determining the sand injection time before the start of the sand control test.

[0098] Figure 5 A schematic diagram of the physical structure of an electronic device provided by the present invention, such as... Figure 5 As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840. The processor 810, communication interface 820, and memory 830 communicate with each other via the communication bus 840. The processor 810 can call logic instructions in the memory 830 to execute the sand control test method, acquire data from the regulating valve of the sand injector, combine this data with the power of the air compressor to form sand injection information; acquire data from the flow meter of the return sand box to form return sand information; acquire the air sand content information and sand chamber volume information required for the test; and calculate the sand injection time before the start of the sand control test based on the air sand content information, sand chamber volume information, sand injection information, and return sand information.

[0099] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0100] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by the computer, the computer can execute the sand control test method provided by the above methods, obtain the data of the regulating valve of the sand injector, combine it with the power of the air compressor to form sand injection information; obtain the data of the flow meter of the return sand box to form return sand information; obtain the air sand content information and the sand chamber volume information required for the test; and calculate the sand injection time before the start of the sand control test based on the air sand content information, sand chamber volume information, sand injection information, and return sand information.

[0101] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program performs the sand control test methods provided above, acquires data from the regulating valve of the sand injector, and combines this data with the power of the air compressor to form sand injection information; acquires data from the flow meter of the return sand box to form return sand information; acquires air sand content information and dust chamber volume information required for the test; and calculates the sand injection time before the start of the sand control test based on the air sand content information, dust chamber volume information, sand injection information, and return sand information.

[0102] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0103] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sand-control testing device, characterized in that, The device includes: A sand and dust chamber is provided with a diffuser fan at the sand spraying inlet at the first end of the sand and dust chamber. The second end of the sand and dust chamber is opposite to the first end. The diffuser fan generates an airflow in a first direction from the first end to the second end. The second end is provided with the starting end of a return channel. The end end of the return channel is located at the first end. The return channel guides the airflow to the first end to form a loop. A filter module is installed on the side wall of the dust chamber to maintain the air pressure inside the dust chamber. A sand spray nozzle, one end of which is disposed at the sand spray inlet and faces the interior of the sand chamber, and the other end of which is connected to the air inlet outside the sand chamber; The bottom of the sand injector is connected to the air inlet via a regulating valve; A return sand box is located below the sand injector, and a flow meter is installed in the return sand box; A gas sampler is used to collect the sand content in the air inside the dust chamber.

2. The sand control test device according to claim 1, characterized in that, The filtration module includes multiple layers of filters arranged sequentially along the first direction, with the resistance to airflow of each layer of the filter increasing sequentially along the first direction.

3. The sand control test device according to claim 2, characterized in that, The multilayer filter consists of three layers, which are sequentially arranged along the first direction as follows: A first filter with a honeycomb-shaped perforated structure is used to ensure the dust dispersion of the dust chamber; Dust-blocking walls with dispersed, perforated structures are used to settle large particles of sand and dust. A second filter with high air resistance is used to filter out fine dust particles before releasing the air into the atmosphere.

4. The sand control testing device according to claim 1, characterized in that, The second end is also provided with an auxiliary fan, which is located upstream of the starting end of the return channel in the first direction.

5. The sand control testing device according to claim 1, characterized in that, The device further includes: A controller, which is connected to the flow meter and the regulating valve.

6. The sand control testing device according to claim 5, characterized in that, The device further includes: The gas sampler is connected to the controller.

7. The sand control test device according to claim 5, characterized in that, The device further includes: A variable frequency air compressor, wherein the variable frequency air compressor is connected to the air inlet via an air delivery pipe.

8. A sand control test method, characterized in that, The sand control test apparatus as described in any one of claims 1-7 is used; the method comprises: Data from the regulating valve of the sand injector is obtained and combined with the power of the air compressor to form sand injection information; Data from the flow meter of the sand return chamber is acquired to generate sand return information; Obtain the required information on air dust content and dust chamber volume for the experiment; Based on the information on air sand content, sand chamber volume, sand injection, and sand return, the sand injection time before the start of the sand control test is calculated.

9. The sand control test method according to claim 8, characterized in that, The method further includes: Obtain indoor dust content information collected by a gas sampler; Determine whether the dust content information in the dust chamber meets the requirements of the air dust content information required for the test. If it meets the requirements, start the sand control test; if it does not meet the requirements, continue sand injection.

10. A sand control testing system, characterized in that, For performing the sand control test method as described in claim 8 or 9; the system comprises: The first acquisition module is used to acquire data from the regulating valve of the sand injector and combine it with the power of the air compressor to form sand injection information; The second acquisition module is used to acquire data from the flow meter of the sand return box to form sand return information; The third acquisition module is used to acquire information on air sand content and dust chamber volume required for the experiment. The calculation module is used to calculate the sand injection time before the start of the sand control test based on the air sand content information, sand chamber volume information, sand injection information, and sand return information.

Images