Test device and test method for flow passage non-return mechanism

Abstract

The present disclosure provides a test device and a test method for a flow channel check valve, and belongs to the technical field of fluid mechanics. The test device for a flow channel check valve comprises a tank body, a power device and a mounting seat. The mounting seat is located in the tank body and divides the tank body into a first cavity and a second cavity. The first cavity and the second cavity are filled with fluid medium. The mounting seat has a mounting hole for mounting the flow channel check valve to be tested. The mounting hole connects the first cavity and the second cavity. The outlet of the power device selectively communicates with the first cavity. The power device is used to pressurize the fluid medium in the first cavity. The present disclosure can reduce the test cost.

Description

Technical Field

[0001] This disclosure belongs to the field of fluid mechanics technology, and specifically relates to a test apparatus and test method for a flow channel check mechanism. Background Technology

[0002] A flow check mechanism is a control device used to achieve unidirectional fluid flow. Its core function is to prevent backflow of the medium by automatically opening and closing the flow channel. The flow check mechanism consists of multiple blades (or baffles) and a base. Each blade is rotatably connected to the base. Under positive fluid pressure, the blades rotate and open, ensuring the flow channel in the base remains unobstructed. When there is no positive fluid pressure, the blades close rapidly under their own weight, cutting off the flow channel, thus achieving the directional flow characteristic of the flow check mechanism.

[0003] In related technologies, to verify the stability and sealing performance of the flow channel check mechanism during long-term operation, rigorous performance verification tests are required before it is officially put into use. Performance verification tests include forward flow tests and forward flow reliability tests. The reliability test requires more than 1000 cycles. During testing, the flow channel check mechanism is typically installed in relevant equipment (such as a ship), and then the equipment's built-in pumps and other supporting equipment are used to drive fluid flow for testing.

[0004] However, frequent testing accelerates the wear and tear on the pump units that drive the fluid flow, significantly shortening their lifespan. Since these pump units and related equipment are expensive, this ultimately leads to a substantial increase in testing costs. Summary of the Invention

[0005] This disclosure provides a testing apparatus and method for a flow channel check mechanism, which can verify the flow channel check mechanism before assembly to reduce wear on power equipment. The technical solution is as follows: This disclosure provides a test apparatus for a flow channel check mechanism. The test apparatus includes a tank, a power unit, and a mounting base. The mounting base is located inside the tank and divides the tank into a first cavity and a second cavity, both of which are filled with a fluid medium. The mounting base has a mounting hole for mounting the flow channel check mechanism to be tested, and the mounting hole connects the first cavity and the second cavity. The outlet of the power unit is selectively connected to the first cavity, and the power unit is used to pressurize the fluid medium in the first cavity.

[0006] In another implementation of this disclosure, the tank includes a body and a baffle. The baffle is located in the second cavity and on the side of the mounting hole away from the bottom of the body. The baffle, the mounting base, and the top of the body define an overflow outlet. One side of the baffle contacts the mounting base, and both ends of the side of the baffle that contacts the mounting base protrude outside the mounting hole. The baffle is detachably connected to the tank.

[0007] In another implementation of this disclosure, the baffle includes a flat plate and a side plate surrounding the outer periphery of the flat plate. The side plate is located on a plate surface of the flat plate facing the sealing cover and is connected to the flat plate. The side plate has a connection hole for connecting to the tank body and fits against the inner wall of the body.

[0008] In another implementation of this disclosure, the flat plate is fan-shaped, and the central angle of the fan is greater than 60 degrees and less than 120 degrees.

[0009] In another implementation of this disclosure, the tank further includes a sealing cap located at the top opening of the body and connected to the mounting base and the body, respectively, wherein the mounting base, the sealing cap, and the body define a sealed first cavity.

[0010] In another implementation of this disclosure, the sealing cap has a liquid inlet penetrating both opposite sides of the sealing cap; the test device further includes a liquid replenishment component located at the liquid inlet and connected to the sealing cap.

[0011] In another implementation of this disclosure, the power equipment includes a high-pressure air source and a first control valve, the first control valve being connected to the sealing cover, and the outlet of the first control valve communicating with the first cavity, and the inlet of the first control valve being connected to the high-pressure air source.

[0012] In another implementation of this disclosure, the test apparatus further includes a base and a drain pipe, the base being connected to the bottom of the tank; one end of the drain pipe is located inside the base and is connected to the bottom of the first cavity and the second cavity, respectively.

[0013] On the other hand, this disclosure also provides a test method for a flow channel check mechanism, the test method comprising: installing the flow channel check mechanism to be tested in the mounting hole of the test device; controlling the power equipment to apply pressure to the fluid medium in the first cavity; and observing and recording the opening and closing state of the flow channel check mechanism.

[0014] In another implementation of this disclosure, the second cavity and the first cavity are filled with the fluid medium; the pressure applied when pressurizing the fluid medium in the first cavity is calculated based on the flow rate through which the check valve mechanism of the flow channel under test operates.

[0015] The beneficial effects of the technical solutions provided in this disclosure are: When testing the flow channel check mechanism using the testing apparatus provided in this embodiment, since the testing apparatus includes a tank and a mounting base, with the mounting base located inside the tank and having mounting holes for mounting the flow channel check mechanism to be tested, the flow channel check mechanism can be pre-installed in the mounting base through the mounting holes. Furthermore, since both the first and second chambers are filled with fluid media, the flow channel check mechanism can be immersed in the fluid media. Simultaneously, since the testing apparatus also includes a power device, and the outlet of the power device is selectively connected to the first chamber, during the test, by controlling whether the power device is connected to the first chamber, sufficient pressure can be maintained in the fluid medium of the first chamber, allowing the flow channel check mechanism to open under pressure, thereby verifying the reliability of the flow channel check mechanism.

[0016] Since the test apparatus provided in this embodiment does not require the flow channel check mechanism to be installed before testing, the fluid flow can be driven by a power device instead of relying on the pump set or other supporting equipment that comes with the flow channel check mechanism. This greatly reduces the wear and tear of the pump set and other supporting equipment during the test phase, thereby significantly reducing the test cost. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the flow channel check mechanism provided in an embodiment of the present disclosure; Figure 2 for Figure 1 A schematic diagram of the flow channel check mechanism when it is open; Figure 3 A schematic diagram of the structure of a test device for a flow channel check mechanism provided in an embodiment of this disclosure; Figure 4 for Figure 3 Top view; Figure 5 for Figure 3 Schematic diagram of the structure of the power equipment; Figure 6 for Figure 3 A cross-sectional view along the BB direction.

[0019] The symbols in the diagram represent the following meanings: 1. Tank body; 11. Main body; 13. Sealing cap; 130. Liquid inlet; 101. First chamber; 102. Second chamber; 12. Baffle; 120. Overflow outlet; 121. Flat plate; 122. Side plate; 15. Outer flange; 16. Intermediate crossbeam; 2. Power equipment; 21. High-pressure air source; 22. First control valve; 23. Pressure gauge; 3. Mounting base; 30. Mounting hole; 4. Liquid replenishment assembly; 41. Liquid replenishment valve; 42. Liquid replenishment pipeline; 6. Base; 61. Support plate; 62. Bottom plate; 63. Connecting stiffener; 7. Drainage pipe; 200. Flow channel check valve; 201. Blade; 202. Connecting seat; 203. Flow channel. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0021] In related technologies, a flow channel check mechanism is a control device used to achieve unidirectional fluid flow. Its core function is to prevent backflow of the medium by automatically opening and closing the flow channel.

[0022] Figure 1 This is a schematic diagram of the flow channel check mechanism provided in the embodiments of this disclosure, combined with... Figure 1 The flow channel check valve 200 includes multiple blades 201 and a connecting seat 202.

[0023] The connecting seat 202 has multiple flow channels 203 arranged in a one-to-one correspondence with multiple blades 201. The multiple flow channels 203 are arranged in a vertical direction.

[0024] Multiple blades 201 are located on the same side of the connecting seat 202, with each blade 201 positioned at a corresponding flow channel 203. Each blade 201 is rotatably connected to the connecting seat 202. The axial direction of the rotational connection between the blade 201 and the connecting seat 202 is horizontal. The rotational connection axis of each blade 201 and the connecting seat 202 is parallel to each other. Under positive water pressure, each blade 201 rotates to a horizontal position, opening the flow channel 203. When there is no positive water pressure, it closes the corresponding flow channel 203 under its own gravity. This gives the flow check mechanism the function of forward flow and reverse cut-off.

[0025] Combination Figure 1 When there is no positive water pressure (after the water flow stops), each blade 201 closes the corresponding flow channel 203 under its own gravity.

[0026] Figure 2 for Figure 1 A schematic diagram of the flow channel check mechanism when it is open, combined with... Figure 2 Under the action of positive water pressure, each blade 201 rotates to a horizontal position, thereby opening the flow channel 203.

[0027] The positive water pressure is the direction from the first side to the second side of the connecting seat 202 (that is...) Figure 2 (a) In this context, the first side of the connecting seat 202 faces the plurality of blades 201. The second side of the connecting seat 202 is the side away from the plurality of blades 201.

[0028] For example, each blade 201 is an elongated plate-like structure. The connecting seat 202 may be a frame-type structure.

[0029] This disclosure provides a test apparatus for a flow channel check mechanism, such as... Figure 3 As shown, the test apparatus includes a tank 1, a power unit 2, and a mounting base 3.

[0030] The mounting base 3 is located inside the tank 1 and divides the tank 1 into a first cavity 101 and a second cavity 102, both of which are filled with fluid medium.

[0031] The mounting base 3 has a mounting hole 30 for mounting the flow channel check mechanism to be tested, and the mounting hole 30 connects the first chamber 101 and the second chamber 102. The outlet of the power device 2 is selectively connected to the first chamber 101. The power device 2 is used to pressurize the fluid medium in the first chamber 101.

[0032] When testing the flow channel check mechanism using the testing apparatus provided in this embodiment, since the testing apparatus includes a tank 1 and a mounting base 3, with the mounting base 3 located inside the tank 1 and having mounting holes 30 for mounting the flow channel check mechanism to be tested, the flow channel check mechanism to be tested can be pre-installed in the mounting base 3 through the mounting holes 30. Furthermore, since both the first chamber 101 and the second chamber 102 are filled with fluid medium, the flow channel check mechanism can be placed within the fluid medium. Simultaneously, since the testing apparatus also includes a power device 2, and the outlet of the power device 2 is selectively connected to the first chamber 101, during the test, by controlling whether the power device 2 is connected to the first chamber 101, sufficient pressure can be maintained in the fluid medium of the first chamber 101, allowing the flow channel check mechanism to open under pressure, thereby verifying the reliability of the flow channel check mechanism.

[0033] Since the test apparatus provided in this embodiment does not require the flow channel check mechanism to be installed before testing, the fluid flow can be driven by the power equipment 2 instead of relying on the pump set and other supporting equipment that come with the flow channel check mechanism. This greatly reduces the wear of the pump set and other supporting equipment during the test phase, thereby significantly reducing the test cost.

[0034] In addition, during the test, after pressure is applied to the first chamber 101, the flow channel is opened after the flow check mechanism opens the flow channel, and the fluid medium overflowing from the second chamber 102 is exactly the flow rate of the flow check mechanism in a single test, which facilitates calculation.

[0035] In addition, in order to ensure that the volume of the overflowing fluid medium meets the flow rate requirements during each test, the volume of the fluid medium located above the flow channel check structure in the first cavity 101 must not be less than the flow rate requirement of the flow channel check structure for a single test.

[0036] For example, in the initial state of the experiment, the total volume of the first chamber 101 is V1, and the first chamber 101 is filled with a fluid medium. The volume of the fluid medium is V1, and there is no gas. The total volume of the second chamber 102 is V2, and the second chamber 102 is filled with a fluid medium. The volume of the fluid medium is V2, and there is no gas.

[0037] When a volume v of high-pressure gas is injected into the first chamber 101, an equal volume of fluid medium is simultaneously discharged. The remaining fluid medium in the first chamber 101 is V1-v, the volume of the gas in the first chamber 101 is v, and the pressure is P1.

[0038] When the flow channel check mechanism opens, the first chamber 101 and the second chamber 102 become connected. The gas in the first chamber 101 enters the second chamber 102, causing the fluid in the second chamber 102 to overflow. Ultimately, the gas occupies the space in the first chamber 101 and the second chamber 102 that was not filled with fluid.

[0039] Assume the volume of the overflow fluid in the second chamber 102 is ΔV, which is also the volume that passes through in a single operation of the check valve mechanism in the test flow channel. The fluid volume in the first chamber 101 is V1-v. The fluid medium volume in the second chamber 102 is V2-ΔV.

[0040] The total gas volume is v+ΔV (occupying the "new" space in both chambers).

[0041] According to the ideal gas law, the above parameters satisfy the following formula (1).

[0042] ; (1) Where P2 is the ambient pressure, also known as atmospheric pressure. During the experiment, T1 and T2 were both at room temperature and remained constant.

[0043] Therefore, the above formula (1) can be transformed into formula (2). (2) Then, according to formula (2), it can be converted into formula (3). ; (3) The pressure of the high-pressure gas entering the first chamber 101 can be calculated using formula (3). Alternatively, ΔV can be calculated using formula (2) or (3) and the pressure applied by the power device 2 to the fluid medium in the first chamber 101.

[0044] Based on the above calculation process, it is assumed that the flow rate passing through the check valve mechanism in the test channel is 2m³. 3 / s, initial flow rate is 0m 3 / s, the test time (also the purging time) is 1s, therefore the volume of the fluid medium purged in a single purging (also the volume of the fluid medium overflowing from the second chamber 102) is 2m³. 3 .

[0045] Optionally, the tank body 1 includes a body 11 and a baffle 12. The baffle 12 is located in the second cavity 102 and on the side of the mounting hole 30 away from the bottom of the body 11. The baffle 12, the mounting base 3, and the top of the body 11 define an overflow outlet 120. One side of the baffle 12 contacts the mounting base 3, and both ends of the side of the baffle 12 that contacts the mounting base 3 protrude beyond the mounting hole 30. The baffle 12 is detachably connected to the tank body 1.

[0046] In the above implementation, the baffle 12 is arranged above the second cavity 102 to prevent the overflowing fluid from falling back onto the flow channel check mechanism to be tested, thus avoiding additional impact on the opening or closing of the flow channel check mechanism when the overflowing fluid falls back due to gravity during the test, and ultimately improving the reliability of the test.

[0047] Wherein, the two ends of the side of the baffle 12 that contacts the mounting base 3 protrude beyond the mounting hole 30, meaning that the orthographic projection of the side of the baffle 12 that contacts the mounting base 3 at the bottom of the body 11 covers the orthographic projection of the mounting hole 30 at the bottom of the body 11.

[0048] Optionally, the baffle 12 includes a flat plate 121 and a side plate 122 surrounding the outer periphery of the flat plate 121. The side plate 122 is located on a plate surface of the flat plate 121 facing the sealing cover 13 and is connected to the flat plate 121. The side plate 122 has a connection hole for connecting to the body 11 and fits against the inner wall of the body 11.

[0049] In the above implementation, the baffle 12, with the aforementioned structure, not only covers the top of the second cavity 102 with the flat plate 121, preventing overflowing water from falling back onto the flow check mechanism on the mounting base 3, but also has fastening holes provided in the side plate 122 surrounding the outer periphery of the flat plate 121, so that bolts or other fasteners can be connected in the fastening holes to achieve a detachable connection between the baffle 12 and the body 11.

[0050] In this embodiment, in order to further improve the stability of the baffle 12, after the fastener is inserted into the connection hole in the baffle 12, it can also be connected to the mounting base 3 by the fastener.

[0051] Figure 4 for Figure 3 The top view, that is Figure 3 for Figure 4 A cross-sectional view along the AA direction, combined with Figure 4 In this embodiment, the tank body 1 is a hollow cylindrical structure. The plate 121 is fan-shaped, with a central angle greater than 60 degrees and less than 120 degrees. The outer arc surface of the plate 121 contacts the inner wall of the body 11. This allows the baffle 12 to effectively block the flow channel check mechanism.

[0052] In this embodiment, the central angle of the plate 121 is 90 degrees.

[0053] See also Figure 3 and Figure 4 Optionally, the tank body 1 also includes a sealing cover 13, which is located at the top opening of the body 11 and on one side of the baffle 12. The mounting base 3 is connected to the sealing cover 13 and the body 11 respectively, and the mounting base 3, the sealing cover 13 and the body 11 define a sealed first cavity 101.

[0054] In the above implementation, the sealing cover 13 is used to close the first cavity 101, making the first cavity a closed cavity. When the power device 2 applies pressure to the first cavity 101, the fluid medium in the first cavity 101 can be pressurized rapidly, thereby improving the test efficiency.

[0055] For example, the sealing cover 13 is a semi-circular cover plate. This facilitates processing and manufacturing.

[0056] Optionally, the mounting base 3 is a partition, and the opposite sides of the mounting base 3 are respectively connected to the inner wall of the tank 1. The mounting hole 30 penetrates the opposite sides of the mounting base 3, and the plane where the mounting base 3 is located is perpendicular to the plane where the baffle 12 is located.

[0057] In the above implementation, the mounting base 3 is set as a partition, which can easily divide the tank 1 into two parts, thereby forming the first cavity 101 and the second cavity 102. At the same time, setting the mounting base 3 and the baffle 12 to be arranged perpendicularly also facilitates the installation of the baffle 12.

[0058] For example, the mounting hole 30 in the mounting base 3 can be more than one, such as two. The two mounting holes 30 are arranged at intervals.

[0059] This allows for simultaneous testing of multiple flow channel check mechanisms. In this case, the baffle 12 can be of other shapes and positioned above the multiple flow channel check mechanisms to simultaneously cover them.

[0060] See Figure 3 In this embodiment, the tank body 1 further includes an outer flange 15 and a central crossbeam 16. The outer flange 15 is disposed on the top outside of the body 11 and connected to the body 11. The outer flange 15 has a plurality of spaced first connecting holes along its circumference. The central crossbeam 16 is located on the top of the tank body 1 and inside the outer flange 15, with both ends of the central crossbeam 16 connected to the outer flange 15.

[0061] The sealing cover 13 has second connecting holes along its circumference and at both ends of the intermediate crossbeam 16. The same screw or other fastener is simultaneously inserted into both the first and second connecting holes, thereby connecting the sealing cover 13 to the tank body 1.

[0062] In this embodiment, in order to achieve the sealing assembly of the sealing cap 13 and the tank body 1, grooves are provided in both the intermediate crossbeam 16 and the outer flange 15. The grooves in the intermediate crossbeam 16 and the outer flange 15 are interconnected, and each of the two sealing rings is respectively installed in the groove in the intermediate crossbeam 16 and the groove in the outer flange 15.

[0063] The sealing ring can be an O-ring.

[0064] See also Figure 3 Optionally, the power equipment 2 includes a high-pressure air source 21 and a first control valve 22. The first control valve 22 is connected to the sealing cover 13, and the outlet of the first control valve 22 is connected to the first chamber 101, while the inlet of the first control valve 22 is connected to the high-pressure air source 21.

[0065] In the above implementation, the high-pressure gas source 21 serves as a pressure source to apply air pressure to the first chamber 101. The first control valve 22 is used to control whether the high-pressure gas source 21 is connected to the first chamber 101.

[0066] For example, when the first control valve 22 is opened, the high-pressure gas in the high-pressure gas source 21 can enter the first chamber 101, thereby pressurizing the fluid medium in the first chamber 101, causing the flow channel check mechanism to be tested to open, thereby verifying its performance.

[0067] In this embodiment, the first control valve 22 is a shut-off valve. This facilitates control.

[0068] In other examples, the first control valve 22 may also be other valves, such as solenoid valves, directional valves, etc. This disclosure does not impose any limitations on this.

[0069] Figure 5 for Figure 3 A structural diagram of the power equipment, combined with Figure 5 In this embodiment, one end of the first control valve 22 is connected to the high-pressure gas source 21 via a connecting pipe. Simultaneously, the other end of the first control valve 22 is connected to the sealing cover 13 and communicates with the first chamber 101 via a connecting pipe with a flanged end plate.

[0070] For example, the high-pressure gas source 21 may be compressed air, nitrogen, etc. generated by a compressor, or a high-pressure gas (such as helium) stored in a steel cylinder.

[0071] In addition, in order to monitor the gas pressure in the high-pressure gas source 21, a pressure gauge 23 can be installed in the pipeline between the high-pressure gas source 21 and the first control valve 22 so that the pressure can be monitored in real time through the pressure gauge 23.

[0072] Combination Figure 4 Optionally, the sealing cap 13 has a liquid inlet 130 that passes through both opposite sides of the sealing cap 13. The liquid inlet 130 is spaced apart from the first control valve 22 and communicates with the first chamber 101.

[0073] The test apparatus also includes a liquid replenishment component 4, which is located at the liquid replenishment port 130 and connected to the sealing cap 13.

[0074] In the above implementation, the fluid replenishment component 4 is used to replenish the fluid medium in the first cavity 101 so that the replenished fluid medium in the first cavity 101 meets the actual requirements.

[0075] For example, the fluid medium is water. This can greatly reduce the cost of the experiment.

[0076] In other examples, the fluid medium may also be other media, such as oil.

[0077] Figure 6 for Figure 3 A sectional view along the BB direction, combined with Figure 6 Optionally, the replenishment component 4 includes a replenishment valve 41 and a replenishment pipe 42. One end of the replenishment pipe 42 is inserted into the replenishment port 130 and connected to the sealing cap 13, and the other end is connected to the liquid supply device.

[0078] The replenishment valve 41 is located in the middle of the replenishment pipe 42 and is connected to the replenishment pipe 42. The replenishment valve 41 is used to control the opening or closing of the inside of the replenishment pipe.

[0079] In the above implementation, when liquid replenishment is required, the liquid replenishment valve 41 can be opened, thereby controlling the opening of the liquid replenishment pipeline 42, so that the fluid medium in the liquid supply device can flow into the first chamber 101.

[0080] Conversely, when no replenishment is needed, simply close the replenishment valve 41 to shut off the inside of the replenishment pipe 42. The fluid medium within the supply device must not flow into the first chamber 101.

[0081] In this embodiment, the replenishing valve 41 is also a shut-off valve. This facilitates control and saves costs. In other examples, the replenishing valve 41 can also be other valves, such as solenoid valves, directional valves, etc. This disclosure does not limit this.

[0082] For example, the liquid supply device may be a tank connected to a pump and containing a fluid medium, or a tap water system connected to a fire hydrant. For instance, when the fluid medium is water, the liquid supply device corresponds to a water tank connected to a water pump.

[0083] Optionally, the test apparatus further includes a base 6 and a drain pipe 7. The base 6 is located at the bottom of the tank 1 and is connected to the bottom of the tank 1. One end of the drain pipe 7 is located inside the base 6 and is selectively connected to the bottom of the first cavity 101 and the second cavity 102, respectively.

[0084] In the above implementation, the base 6 is used to support the tank 1. The drain pipe 7 is used to discharge the fluid medium inside the tank 1.

[0085] For example, after the test is completed, the fluid medium in tank 1 can be discharged through the drain pipe 7.

[0086] In this embodiment of the present disclosure, a valve is installed in the drain pipe 7. When it is necessary to drain the tank, the valve on the drain pipe 7 can be opened, so that the drain pipe 7 is connected to the interior of the first cavity 101 and the second cavity 102 respectively, and the fluid medium inside the first cavity 101 and the second cavity 102 can be discharged through the drain pipe 7.

[0087] To save on fluid medium usage, the fluid medium discharged from the drain pipe 7 can also be recycled back into the liquid supply device.

[0088] For example, the base 6 includes two spaced-apart support plates 61 and a base plate 62. The two support plates 61 are located on the same surface of the base plate 62 and are connected to the base plate 62. Each support plate 61 has an arcuate surface on its side away from the base plate 62 that fits against the bottom arcuate surface of the tank 1. A space for accommodating the drain pipe 7 is formed between the two support plates 61.

[0089] In the above implementation, the support plate 61 is used to support the tank 1 so that the tank 1 can be placed stably and vertically. The base plate 62 is used to connect the two support plates 61 together, so that the base 6 is a whole, which is convenient to use.

[0090] Optionally, to further increase the structural strength of the base 6, the base 6 also includes connecting stiffeners 63. Multiple connecting stiffeners 63 are located between two support plates 61 and are located on the same surface of the base plate 62 together with the support plates 61. Each connecting stiffener 63 is connected to two adjacent support plates 61.

[0091] The side of the connecting stiffener 63 away from the base plate 62 also has an arc-shaped surface that fits into the bottom arc surface of the tank 1. This increases the contact area between the base 6 and the tank 1, thereby improving the support stability of the base 6 for the tank 1.

[0092] For example, the connecting stiffener 63 can be an inverted trapezoidal plate or other structural component. This allows for more space to be reserved between the shorter lower edge and the base plate 62, facilitating the arrangement of the drainage pipe 7, etc.

[0093] In this embodiment, to simplify the structure, the base 6 can be a single cast component. In other examples, the base 6 can also be a modular structure, with several components welded together separately.

[0094] Optionally, the test apparatus also includes a camera device disposed at the bottom of the tank 1. The camera device is used to monitor the opening and closing status of the flow check structure during the test.

[0095] On the other hand, this disclosure also provides a test method for a flow channel check mechanism, which is implemented by the test device described above.

[0096] The test methods include: Step 1: Install the flow channel check mechanism to be tested into the mounting hole in the test device.

[0097] Step 2: Control the power equipment to apply pressure to the fluid medium in the first chamber.

[0098] Step 3: Observe and record the opening and closing status of the flow channel check mechanism.

[0099] The above test methods have the same beneficial effects as the aforementioned test apparatus, and will not be repeated here.

[0100] It should be noted that the second step in the above experimental method can be implemented as follows: The pressure applied to the first cavity of the power equipment box is calculated based on the flow rate through which the check valve mechanism of the test flow channel is working.

[0101] For example, assuming the flow rate of a single flow channel check mechanism is 2 m³ / s, the initial flow rate is 0 m³ / s, and the purging time (also the test time for the fluid to pass through the check mechanism after ventilation) is 1 second, the volume of the fluid medium purged in a single operation is 2 m³ / s. 3 .

[0102] Then the applied pressure can be calculated according to the formulas (1)-(3) above.

[0103] During the test, the outlet pressure of the high-pressure gas source 21 was adjusted to the calculated value. The outlet pressure of the high-pressure gas source 21 was monitored by a pressure gauge. When the outlet pressure of the high-pressure gas source 21 reached the calculated value, the operator quickly opened the first control valve 22 within 1 second. The high-pressure gas in the high-pressure gas source 21 entered the first chamber 101, pushing the fluid medium in the first chamber 101 to flow through the flow channel check mechanism to the second chamber 102. Within 1 second, the fluid medium in the second chamber 102 (approximately 2 m³)... 3 It was blown out of the tank 1.

[0104] During the test, underwater cameras were used to observe and record whether the flow channel check mechanism opened normally under the action of forward flow, and whether it closed normally after the flow stopped. After the test, the structure was checked for damage.

[0105] After each test, the fire hose is connected via the replenishment assembly 4 to replenish water to the first chamber 101, with a replenishment volume of approximately 2m. 3 .

[0106] The apparatus disclosed herein can perform forward flow tests and forward flow reliability tests on flow channel check mechanisms at a relatively low cost. This testing apparatus has a simple structure, low cost, and is easy to operate, and has broad application prospects.

[0107] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A test apparatus for a flow channel check valve mechanism, characterized in that, The test device includes a tank (1), a power unit (2) and a mounting base (3). The mounting base (3) is located inside the tank (1) and divides the tank (1) into a first chamber (101) and a second chamber (102). Both the first chamber (101) and the second chamber (102) are filled with fluid medium. The mounting base (3) has a mounting hole (30) for mounting the flow channel check mechanism to be tested, the mounting hole (30) connecting the first cavity (101) and the second cavity (102); The outlet of the power device (2) is selectively connected to the first cavity (101), and the power device (2) is used to pressurize the fluid medium in the first cavity (101).

2. The experimental apparatus according to claim 1, characterized in that, The tank (1) includes a body (11) and a baffle (12). The baffle (12) is located in the second cavity (102) and on the side of the mounting hole (30) away from the bottom of the body (11). The baffle (12), the mounting base (3), and the top of the body (11) define an overflow outlet (120). One side of the baffle (12) contacts the mounting base (3), and both ends of the side of the baffle (12) that contacts the mounting base (3) protrude outside the mounting hole (30). The baffle (12) is detachably connected to the tank (1).

3. The experimental apparatus according to claim 2, characterized in that, The baffle (12) includes a flat plate (121) and a side plate (122) surrounding the outer periphery of the flat plate (121). The side plate (122) is located on a plate surface of the flat plate (121) facing the sealing cover (13) and is connected to the flat plate (121). The side plate (122) has a connection hole for connecting to the body (11) and fits against the inner wall of the body (11).

4. The experimental apparatus according to claim 3, characterized in that, The flat plate (121) is fan-shaped, and the central angle of the fan is greater than 60 degrees and less than 120 degrees.

5. The test apparatus according to claim 2, characterized in that, The tank (1) also includes a sealing cap (13), which is located at the top opening of the body (11) and is connected to the mounting base (3) and the body (11) respectively. The mounting base (3), the sealing cap (13) and the body (11) define a sealed first cavity (101).

6. The experimental apparatus according to claim 5, characterized in that, The sealing cap (13) has a liquid inlet (130) that extends through both opposite sides of the sealing cap (13). The test apparatus also includes a liquid replenishment component (4), which is located at the liquid replenishment port (130) and connected to the sealing cap (13).

7. The test apparatus according to claim 5, characterized in that, The power equipment (2) includes a high-pressure air source (21) and a first control valve (22). The first control valve (22) is connected to the sealing cover (13), and the outlet of the first control valve (22) is connected to the first chamber (101), and the inlet of the first control valve (22) is connected to the high-pressure gas source (21).

8. The test apparatus according to any one of claims 1-7, characterized in that, The test apparatus also includes a base (6) and a drain pipe (7), the base (6) being connected to the bottom of the tank (1); One end of the drain pipe (7) is located inside the base (6) and is connected to the bottom of the first cavity (101) and the second cavity (102) respectively.

9. A test method for a flow channel check valve mechanism, characterized in that, The test method is implemented using the test apparatus according to any one of claims 1-8, and the test method includes: Install the flow channel check mechanism to be tested in the mounting hole of the test device; Control the power equipment to apply pressure to the fluid medium in the first cavity; Observe and record the opening and closing status of the flow channel check mechanism.

10. The test method according to claim 9, characterized in that, The second cavity and the first cavity are filled with the fluid medium; The pressure applied when pressurizing the fluid medium in the first cavity is calculated based on the flow rate passing through the check valve mechanism of the flow channel under test.

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