Nozzle blocking device and scrubber strength test system and method

Abstract

The present application relates to a nozzle plugging device and a scrubber strength test system and method, which include: a test box having a closed cavity therein, on which at least one access hole is provided, so that the nozzle can be sealedly connected to the closed cavity through the access hole; a pressure regulating component, which is connected to the closed cavity through a connecting pipe, so as to adjust the pressure in the closed cavity. Through the above scheme, automatic plugging can be achieved, and the plugging reliability is very high, which can effectively prevent the test personnel from being exposed to extreme environments, and even if there are multiple nozzles on a nozzle or the scrubber has multiple nozzles, effective plugging can be achieved.

Description

Technical Field

[0001] The present application relates to the field of scrubber detection, and in particular to a nozzle blocking device and a scrubber strength test system and method. Background Art

[0002] The performance test items of automobile washers specified in the national standard GB15085 are mandatory items before the announcement on the M1 vehicle, so the performance of the washers needs to be tested during the vehicle development verification and regulatory testing stages. Under this test item, the strength test of the washers needs to be repeatedly verified under high temperature 80℃, low temperature -18℃ and normal temperature 20℃ environmental conditions, that is, all the nozzles of the washers are blocked, and the washers water spray motor is started 6 times within 1 minute, each time for at least 3s, and then the nozzles are released to verify whether the washers can spray the solution in the washing pot to the target area.

[0003] Because after each strength test, it is necessary to verify whether the solution can be sprayed to the target area of ​​the windshield under the current temperature conditions, most of the current test schemes are vehicle testing methods; there is also a bench test method that tests by building an equivalent bench, which can greatly reduce the size requirements for the environmental chamber and greatly reduce the test cost. However, in both test methods, the nozzle is usually blocked manually during the strength test verification. The tester will be exposed to the current temperature, especially at -18℃ and 80℃, which is extremely harmful to people, and the effectiveness of the blockage is difficult to guarantee. Summary of the invention

[0004] The embodiments of the present application provide a nozzle plugging device and a washer strength testing system and method to solve the problem in the related art that the nozzles in the washer need to be manually plugged.

[0005] In a first aspect, a nozzle blocking device is provided, which adopts the following scheme:

[0006] A nozzle blocking device, comprising:

[0007] A test box having a sealed cavity therein and at least one access hole formed thereon, so that the nozzle can be sealedly connected to the sealed cavity through the access hole;

[0008] A pressure regulating assembly is connected to the sealed chamber through a connecting pipe to regulate the pressure in the sealed chamber.

[0009] In some embodiments, at least a portion of the test box facing the spraying area of ​​the nozzle is movably opened and closed, so that when the test box is in a closed state, the nozzle is sealed and connected to the enclosed cavity, and when the test box is in an open state, the nozzle is connected to the external environment and there is no structural obstruction in the spraying direction.

[0010] In some embodiments, the test chamber comprises:

[0011] A movable box body, comprising a first assembly and a second assembly, wherein the first assembly and the second assembly are provided with a clamping notch at the same end, and the first assembly and the second assembly can be close to each other and seal and abut at other edges outside the clamping notch to form the movable box body, and the two clamping notches are combined to form a clamping opening;

[0012] A mounting post, the diameter of which corresponds to the clamping opening, the first assembly and the second assembly clamp the mounting post at the clamping opening, and the access hole is opened thereon;

[0013] A driving assembly is connected to the first assembly and / or the second assembly to drive the combination of the two to form the closed cavity or to open the closed cavity.

[0014] In some embodiments, both ends of the mounting column extend to the inside and outside of the movable box respectively, the access hole is provided on the end surface of the mounting column extending into the movable box, a placement cavity is provided in the mounting column, the placement cavity is connected to the access hole and has an inner diameter larger than the access hole, and the placement cavity is open at the other end surface of the mounting column.

[0015] In some embodiments, the drive assembly includes:

[0016] A first ejection mechanism connected to the first assembly to drive the first assembly to move closer to or away from the mounting column;

[0017] The second ejection mechanism is connected to the second assembly and is used for driving the second assembly to move closer to or away from the mounting column.

[0018] In some embodiments, sealing gaskets are provided on the peripheries of the first assembly and the second assembly for contacting the mounting column and on the peripheries for contacting each other.

[0019] In the second aspect, a scrubber strength test system is provided, which adopts the following scheme:

[0020] A scrubber strength test system, characterized in that it comprises a scrubber and a nozzle plugging device as described above;

[0021] The scrubber comprises:

[0022] liquid storage part;

[0023] A water spray motor connected to the liquid storage part and connected to a delivery pipeline for delivering washing liquid to the outside;

[0024] at least one nozzle connected to the water spray motor through the delivery pipeline;

[0025] The nozzle plugging device is used to connect one or more of the nozzles.

[0026] In a third aspect, a scrubber strength test method is provided, using the following scheme:

[0027] A scrubber strength test method comprising the following steps:

[0028] Determine the relative heights of the liquid storage part, the water spray motor and the nozzle in the scrubber according to the installation position of the scrubber in actual use;

[0029] The nozzle of the scrubber is sealed and connected to the closed cavity, and the air pressure in the closed cavity is adjusted to the set value P o .

[0030] Start the water spray motor and conduct a water spray motor stall test when the nozzle is clogged.

[0031] In some embodiments, the nozzle of the scrubber is sealed and connected to the closed chamber, and the air pressure in the closed chamber is adjusted to a set value P o If the scrubber has multiple nozzles, each nozzle is connected to a closed chamber, and the air pressure in each closed chamber is adjusted to the set value P o .

[0032] In some embodiments, the pressure value P in the closed cavity is increased. o middle,

[0033] P e -ρgH-P air ·V t1 / (N·V o )<P o <Min[P e -ρgh+(P e -ρgh-P air )·V t1 / (N·Vo),P e ];

[0034] Among them, P e is the stall output pressure of the water spray motor; ρ is the density of the washing liquid in the liquid storage part; g is the acceleration of gravity; H is the vertical height of the nozzle relative to the water outlet of the water spray motor; P air is the ambient air pressure outside the closed cavity; h is the vertical height of the maximum storage liquid level of the liquid storage part relative to its outlet; V t1 is the residual volume of the washing liquid in the liquid delivery pipeline when the liquid level is h; N is the number of closed cavities connected to the washer; V o is the volume of the closed cavity.

[0035] The beneficial effects of the technical solution provided by this application include:

[0036] The embodiments of the present application provide a nozzle plugging device and a scrubber strength test system and method, which can achieve automated plugging with very high plugging reliability, effectively preventing test personnel from being exposed to extreme environments, and can achieve effective plugging even if there are multiple nozzles on a nozzle or the scrubber has multiple nozzles. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 It is the structural schematic diagram of the scrubber strength test system;

[0039] Figure 2 is a schematic diagram of the scrubber structure;

[0040] Figure 3 is a schematic diagram of the first state of the scrubber strength test system;

[0041] Figure 4 is a schematic diagram of the second state of the scrubber strength test system;

[0042] Figure 5 Schematic diagram of the third state of the scrubber strength test system.

[0043] In the figure:

[0044] 1. Test box; 10. Sealed cavity; 100. Access hole; 101. Sealing ring; 11. First assembly; 12. Second assembly; 13. Clamping port; 14. Mounting column; 140. Placement cavity; 15. First ejection mechanism; 16. Second ejection mechanism; 17. Sealing pad;

[0045] 21. Electric gas pressure regulating valve; 22. Pressure sensor; 23. Connecting pipe;

[0046] 3. Liquid storage part;

[0047] 4. Water spray motor; 40. Delivery pipeline;

[0048] 5. Nozzle. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0050] The embodiments of the present application provide a nozzle plugging device and a washer strength testing system and method, which can solve the problem of manually plugging the nozzle in the washer in the related art.

[0051] Reference Figure 1 In a first aspect, the present application provides a nozzle blocking device, which comprises:

[0052] The test box 1 has a sealed chamber 10 therein, and at least one access hole 100 is provided thereon, so that the nozzle 5 is sealedly connected to the sealed chamber 10 through the access hole 100;

[0053] The pressure regulating assembly is connected to the sealed chamber 10 via a connecting pipe 23 so as to regulate the pressure in the sealed chamber 10 .

[0054] The sealed connection between the nozzle 5 and the sealed chamber 10 through the access hole 100 is that the nozzle 5 is only connected to the sealed chamber 10, and avoids connecting with the external environment, so that the air pressure at the nozzle opening of the nozzle 5 is consistent with the air pressure in the sealed chamber 10. When the nozzle 5 is installed on the access hole 100, a sealing ring 101 is provided on its peripheral side and the peripheral edge of the access hole 100, so as to ensure the sealed connection between the nozzle 5 and the sealed chamber 10.

[0055] The pressure regulating assembly may adopt different structures in different embodiments. In this embodiment, it specifically includes an air compressor (not shown in the figure), an electric air pressure regulating valve 21 and a pressure sensor 22. The air compressor delivers compressed air into the closed chamber 10 through the connecting pipe 23 to increase the air pressure in the closed chamber 10, and subsequently controls the air pressure in the closed chamber 10 to be maintained at a certain value through the electric air pressure regulating valve 21 arranged on the connecting pipe 23. The pressure sensor 22 is used to detect the air pressure in the closed chamber 10 so that relevant personnel can easily grasp and adjust the air pressure in the closed chamber 10.

[0056] With this arrangement, the pressure regulating assembly enables the test personnel to remotely adjust the air pressure in the closed chamber 10, and when the scrubber needs to be strength tested, the test box 1 and the pressure regulating assembly can be used to remotely block the nozzle 5 using air pressure, avoiding the test personnel from manually blocking the nozzle 5 in the test environment, and thus effectively avoiding the problem that the test personnel need to operate in an extreme test environment, while reducing labor costs and improving test safety and efficiency. It is highly integrated with the scrubber bench test method, providing a very beneficial solution to the blockage of the nozzle 5 in the bench test method.

[0057] Since the effect of the nozzle 5 of the scrubber still needs to be tested for spraying the scrubbing liquid after the blocking test is completed, in order to avoid the need for test personnel to enter the test environment to adjust the blocking device of the nozzle 5, the present application further adopts the following technical solution.

[0058] Reference Figure 1 In some preferred embodiments, at least the portion of the test box 1 facing the spraying area of ​​the nozzle 5 is movably opened and closed, so that when the test box 1 is in a closed state, the nozzle 5 is sealed and connected to the closed cavity 10, and when the test box 1 is in an open state, the nozzle 5 is connected to the external environment and there is no structural obstruction in the spraying direction.

[0059] It should be noted that the test box 1 is a movable device that can remotely control the opening and closing of the closed chamber 10, thereby preventing test personnel from entering the test environment. Furthermore, when it is necessary to test the effect of the scrubber nozzle 5 spraying the washing liquid, the test box 1 can be quickly controlled to open, so that the nozzle 5 is connected to the external environment and the blockage is released.

[0060] Reference Figure 1 Optionally, the test box 1 comprises:

[0061] The movable box includes a first assembly 11 and a second assembly 12. The first assembly 11 and the second assembly 12 are provided with a clamping notch at the same end. The first assembly 11 and the second assembly 12 can be close to each other and seal and abut at other edges outside the clamping notch to form the movable box. The two clamping notches are combined to form a clamping opening 13.

[0062] The mounting post 14 has a diameter corresponding to the clamping opening 13. The first assembly 11 and the second assembly 12 clamp the mounting post 14 at the clamping opening 13, and the access hole 100 is opened thereon;

[0063] A driving component is connected to the first assembly 11 and / or the second assembly 12 to drive the combination of the two to form the closed chamber 10 or to open the closed chamber 10.

[0064] The driving assembly is used to control the first assembly 11 and the second assembly 12 to move closer to or farther from each other, so that the two can form a test box 1 with a closed cavity 10 when the mounting column 14 is clamped and abutted against each other.

[0065] This arrangement enables the opening and closing of the test box 1 to be controlled by the driving component when necessary, thereby eliminating the need for test personnel to enter the test environment to open the test box 1.

[0066] Reference Figure 2 Furthermore, both ends of the mounting column 14 extend to the inner side and the outer side of the movable box respectively, the access hole 100 is provided on the end surface of the mounting column 14 extending into the movable box, a placement cavity 140 is provided inside the mounting column 14, the placement cavity 140 is communicated with the access hole 100 and its inner diameter is larger than the access hole 100, and the placement cavity 140 is open at the other end surface of the mounting column 14.

[0067] With such arrangement, after the nozzle 5 for the nozzle 5 blockage motor stall test is connected to the test box 1, the delivery pipe 40 connected to the nozzle 5 in the scrubber can be placed in the placement chamber 140, and because the diameter of the placement chamber 140 is larger than the connecting hole and one end away from the connecting hole is open, there is a sufficient gap between the delivery pipe 40 having a diameter consistent with the diameter of the end of the nozzle 5 and the inner wall of the placement chamber 140, and then when the nozzle 5 is blocked and the strength test of the scrubber is carried out, the air pressure on the side of the delivery pipe 40 is consistent with the external environment, that is, the air pressure in the test environment, so that whether the delivery pipe 40 will rupture can be effectively tested and the delivery pipe 40 can be effectively observed with the help of the placement chamber 140, so that the strength test of the scrubber can be smoothly carried out and observed.

[0068] Optionally, the driving assembly comprises:

[0069] A first ejection mechanism 15, connected to the first assembly 11, for driving the first assembly 11 to move closer to or away from the mounting column 14;

[0070] The second ejection mechanism 16 is connected to the second assembly 12 to drive the second assembly 12 to move closer to or away from the mounting post 14 .

[0071] Among them, the first ejection mechanism 15 and the second fixing mechanism are two groups of cylinders respectively connecting the first assembly 11 and the second assembly 12 in this embodiment. In other embodiments, both can select other driving mechanisms that can drive the first assembly 11 and the second assembly 12 to approach each other, such as hydraulic cylinders, electric telescopic rods, etc.

[0072] Optionally, sealing gaskets 17 are provided on the peripheries of the first assembly 11 and the second assembly 12 for contacting the mounting column 14 and on the peripheries for contacting each other.

[0073] This arrangement ensures that the first assembly 11 and the second assembly 12 have effective airtightness when they are connected to each other to form the closed chamber 10, thereby ensuring that the air pressure in the closed chamber 10 can be in a stable state during the subsequent plugging process, thereby ensuring the smooth progress of the scrubber strength test.

[0074] In a second aspect, a scrubber strength test system is provided, which comprises a scrubber and the nozzle plugging device as described above.

[0075] The scrubber comprises:

[0076] Liquid storage part 3;

[0077] A water spray motor 4, which is connected to the liquid storage part 3 and is connected to a delivery pipeline 40 for delivering washing liquid to the outside;

[0078] at least one nozzle 5 connected to the water spray motor 4 through the delivery pipe 40;

[0079] The nozzle blocking device is used to connect one or more nozzles 5 .

[0080] When strength tests are performed on washers of different vehicle models, the nozzle blocking devices can be connected one-to-one with different numbers of nozzles 5 , or one nozzle blocking device can correspond to all nozzles 5 at the same time.

[0081] In a third aspect, a scrubber strength test method is provided.

[0082] A scrubber strength test method comprising the following steps:

[0083] S100, determining the relative heights of the liquid storage part 3, the water spray motor 4 and the nozzle 5 in the scrubber according to the installation position of the scrubber when it is actually used;

[0084] S200, the nozzle 5 of the scrubber is sealed and connected to the closed chamber 10, and the air pressure in the closed chamber 10 is adjusted to a set value P o , P o Greater than the ambient air pressure outside the closed chamber 10;

[0085] S300, starting the water spray motor 4, and performing a blocked-rotor test of the water spray motor 4 when the nozzle 5 is blocked.

[0086] Wherein, step 200 comprises:

[0087] S210, add compressed air into the closed chamber 10 through the connecting pipe 23, and adjust the opening of the electric pressure regulating valve according to the value fed back by the pressure sensor 22 until the pressure in the closed chamber 10 stabilizes at the set value P o , and stabilize for a certain period of time; since the hole of the nozzle 5 is very small and the flow resistance is very large, even if there is leakage of compressed air in the closed chamber 10, the amount will be very small, and before the water spray motor 4 is started, the opening of the electric air pressure regulating valve 21 is controlled by the measured value of the pressure sensor 22, and the pressure in the closed chamber 10 will eventually stabilize to the set value P o .

[0088] S220, wait until the pressure in the sealed chamber 10 stabilizes to P o After that, the opening of the electric pressure regulating valve is kept unchanged throughout the entire blocking test process, and the possible micro-leakage of compressed air in the closed chamber 10 can be continuously compensated.

[0089] Step 300 includes:

[0090] S310, start the water spray motor 4; at this time, the air in the delivery pipe 40 is compressed, and the position of the washing liquid rises to a certain position and then stops rising, thereby achieving the blocking of the water spray motor 4;

[0091] S320, the water spray motor 4 stops running after being blocked for T1 seconds; at this time, the air in the delivery pipe 40 expands, so that the liquid level of the solution returns to the vertical height of the water solution in the delivery pipe 40 relative to the water outlet of the water spray motor 4 before the water spray motor 4 is started;

[0092] S330, the water spray motor 4 stops running for T2 seconds and then starts again. After N cycles of start and stop, the entire blockage test process ends, where T1≥3, N*T1+5*T2≤60, which means that the test requirements are met. The values ​​of T1, T2 and N are determined by the test personnel according to the test requirements.

[0093] Furthermore, after step 300, the first assembly 11 and the second assembly 12 can be controlled to move in the opposite direction, that is, the test box 1 is opened to place the nozzle 5 in the external environment. At this time, the scrubber can perform the next verification work, such as detecting the spraying ability of the scrubbing liquid.

[0094] Optionally, the nozzle 5 of the scrubber is sealed and connected to the closed chamber 10, and the air pressure in the closed chamber 10 is adjusted to a set value P o In the embodiment, if the scrubber has a plurality of nozzles 5, each nozzle 5 is connected to a closed chamber 10, and the air pressure in each closed chamber 10 is adjusted to a set value P o .

[0095] Among them, the setting value P o The setting interval of can be calculated as follows:

[0096] Reference Figure 3-5 The environmental conditions of the scrubber blockage test are -18~80℃. Under this condition, air can be regarded as an ideal gas, and the ideal gas state equation can be expressed by pV=nRT. On the other hand, before the blockage test in the scrubber strength test starts, it is necessary to maintain a certain temperature (such as -18℃, 20℃, 80℃) for a long time in the environmental chamber (i.e., the outer environment of the closed chamber 10). At this time, the connecting pipe 23 is generally longer in the insulation chamber. At this time, the compressed air in the connecting pipe 23 in the environmental chamber is basically consistent with the ambient temperature outside the closed chamber 10. At the same time, the various components of the nozzle blockage device for the scrubber strength test have basically reached the ambient temperature. Therefore, the influence of temperature changes can be ignored during the nozzle 5 blockage motor stall test.

[0097] Before step S200, the air pressure in the delivery pipe 40 connecting the water spray motor 4 and the nozzle 5 is the atmospheric pressure P in the current environment. air , the liquid level of the aqueous solution in the delivery pipe 40 is consistent with the liquid storage part 3, and the air volume in the delivery pipe 40 is V t1 .

[0098] After step S220 and before step S300, although the nozzle of the nozzle 51 is very small and has a very large resistance to the fluid, due to the different structures of the washers of different models, it is difficult to accurately determine the amount of compressed air in the closed chamber 10 leaking into the delivery pipe 40, and therefore it is also difficult to accurately determine the effect on the liquid level of the solution in the delivery pipe 40. At this time, it can be assumed that the liquid level of the solution in the delivery pipe 40 is h y , usually 0≤h y ≤h (h is the vertical height of the liquid level of the liquid storage part 3 relative to the water outlet of the water spray motor 4), the corresponding air pressure and volume in the delivery pipeline 40 are P y and V y Then we can get the following equation①:

[0099] P y =P air +ρg(hh y )

[0100] Among them, P y P is the air pressure in the delivery pipeline 40 just before the water spray motor 4 is started; air is the atmospheric pressure; ρ is the density of the washing liquid in the liquid storage part 3; g is the acceleration of gravity; h is the vertical height of the washing liquid level in the liquid storage part 3 relative to the water outlet of the water spray motor 4; h y It is the vertical height of the washing liquid in the delivery pipe 40 relative to the water outlet of the water spray motor 4 just before the water spray motor 4 is started.

[0101] When the nozzle 5 is blocked and the motor is stalled in step S310, the air in the delivery pipe 40 and the closed chamber 10 is compressed or expanded, and finally reaches a steady state, and the air no longer flows. At this time, the pressure of the air in the delivery pipe 40 and the closed chamber 10 is equal. Therefore, when the nozzle 5 is blocked and the motor is stalled, the following equation group ② can be obtained:

[0102] {

[0103] P y V y =P B V B

[0104] P o V o =P K V K

[0105] P e =P B +ρgh x

[0106] P K =P B

[0107] }

[0108] Among them, P y V is the air pressure in the delivery pipeline 40 just before the water spray motor 4 is started; y P is the volume of air in the delivery pipe 40 immediately before the water spray motor 4 is started; o V is the pressure in the closed chamber 10 just before the water spray motor 4 is started; o P is the volume of the closed chamber 10, that is, the volume of compressed air in the closed chamber 10 just before the water spray motor 4 is started; B V is the pressure of the air in the original delivery pipeline 40 after being compressed or expanded when the nozzle 5 is blocked and the motor is stalled; B P is the volume of the air in the original delivery pipeline 40 after being compressed or expanded when the motor is blocked; K V is the pressure of the compressed air in the original closed chamber 10 after being compressed or expanded when the motor is stalled; K P is the volume of compressed air in the original closed chamber 10 after being compressed or expanded when the motor is locked; e is the stalled output pressure of the motor; ρ is the density of the solution in the liquid storage part 3; g is the gravitational acceleration; h x It is the vertical height of the liquid level in the delivery pipeline 40 relative to the water outlet of the water spray motor 4 when the motor is blocked.

[0109] When the nozzle 5 is effectively blocked, the liquid level height h when the motor is blocked x Satisfy h y<h x <H (where h y is the vertical height of the aqueous solution in the conveying pipeline 40 relative to the water outlet of the water spraying motor 4 at the moment before the water spraying motor 4 starts, and H is the vertical height of the nozzle 5 of the nozzle relative to the water outlet of the water spraying motor 4). Applying the limit method, when h x = h y , the liquid level of the solution does not rise. Since there are N (N is generally 2) nozzles 5 in the scrubber nozzle, and the vertical heights of the nozzles 5 of each nozzle relative to the water outlet of the water spraying motor 4 are basically the same, so V B + N·V K = V y + N·V o . At this time, according to the system of equations ②, the upper limit value of the set pressure of the compressed air can be obtained as:

[0110] P o = P e - ρgh y +(P e - ρgh y - P y )·V y / (N·V o )

[0111] When h x = H, the liquid level rises to the nozzle of the nozzle 5. At this time, V B + N·V K = N·V o . At this time, according to the system of equations ②, the lower limit value of the set pressure of the compressed air can be obtained as:

[0112] P o = P e - ρgH - P y ·V y / (N·V o )

[0113] Therefore, the inequality ③ can be obtained:

[0114] P e - ρgH - P y ·V y / (N·V o ) < P o < P e - ρgh y +(P e - ρgh y - P y )·V y / (N·V o )

[0115] Since 0 ≤ h y≤h, so the limit method can be applied again, when h y =h, the solution in the delivery pipeline 40 before step S210 does not change after step S220. At this time, according to equation ①, equation group ④ can be obtained:

[0116] {

[0117] h y =h

[0118] P y =P air

[0119] V y =V t1

[0120] }

[0121] Among them, V t1 It is the residual volume when the liquid level height of the solution in the delivery pipeline 40 is h.

[0122] According to inequality ③ and equation group ④, we can get inequality ⑤:

[0123] P e -ρgH-P air ·V t1 / (N·V o )<P o <P e -ρgh+(P e -ρgh-P air )·V t1 / (N·V o )

[0124] When h y =0, the solution in the delivery pipe 40 before step S210 is just completely pressed back into the liquid storage part 3 after step S220. At this time, according to equation ①, equation group ⑥ can be obtained:

[0125] {

[0126] h y =0

[0127] P y =P air +ρgh

[0128] V y =V t

[0129] }

[0130] Among them, V t is the volume of the delivery pipeline 40, V t >V t1 .

[0131] According to inequality ③ and equation group ⑥, we can get inequality ⑦:

[0132] P e -ρgH-(P air +ρgh)·V t / (N·V o )<P o <P e +(P e -P air -ρgh)·V t / (N·V o )

[0133] However, there is also a possibility that after step S220 and before step S310, the air pressure P in the delivery pipeline 40 is y >P air +ρgh, at this time, the solution pressure in the liquid storage part 3 increases, and even air will emerge from the gap in the lid of the liquid storage part 3. In this case, h y =0,P y The maximum value of cannot exceed Pe, otherwise it will affect the performance verification of the motor. y =0,P y =P e , V y =V t Substituting into inequality ③, we can get inequality ⑧:

[0134] P e -ρgH-P e ·V t / (N·V o )<P o <P e

[0135] Therefore, in order to effectively plug the scrubbers with different structures, P o The value range of is the intersection of the value intervals of inequalities ⑤, ⑦, and ⑧, that is,

[0136] P e -ρgH-P air ·V t1 / (N·Vo)<P o <Min[P e -ρgh+(P e -ρgh-P air )·V t1 / (N·Vo),P e ];

[0137] Among them, N, P e ,ρ,g,H,P air、V t1 、V o and h can be obtained through measurement, inquiry or provision by the scrubber manufacturer before the test.

[0138] This arrangement can achieve automatic plugging with high plugging reliability, effectively preventing test personnel from being exposed to high and low temperature environments, and effectively plugging even if there are multiple nozzles or multiple nozzles 5 on a nozzle 5. The technical solution of the present invention can be highly integrated with the scrubber bench test method, providing a very beneficial solution to the nozzle 5 blockage in the bench test method.

[0139] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0140] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0141] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A nozzle blocking device, characterized in that: It includes: A test box (1) has a sealed chamber (10) therein, and is provided with at least one access hole (100) so that a nozzle (5) can be connected to the sealed chamber (10) through the access hole (100), and a sealing ring (101) is provided around the access hole (100); a pressure regulating assembly, which is connected to the sealed chamber (10) via a connecting pipe (23) and is used to regulate the pressure in the sealed chamber (10); At least the portion of the test box (1) facing the spraying area of ​​the nozzle (5) is movably arranged to be opened and closed. When the test box (1) is in a closed state, the nozzle (5) is sealed and connected to the closed cavity (10), and the nozzle (5) is remotely blocked by air pressure; when the test box (1) is in an open state, the nozzle (5) is connected to the external environment, the blockage is released, and there is no structural obstruction in the spraying direction.

2. The nozzle plugging device according to claim 1, characterized in that: The test box (1) comprises: A movable box body, comprising a first assembly (11) and a second assembly (12), wherein the first assembly (11) and the second assembly (12) are provided with a clamping notch at the same end, and the first assembly (11) and the second assembly (12) can be brought close to each other and sealed against each other at the edges outside the clamping notch to form the movable box body, and the two clamping notches are combined to form a clamping opening (13); A mounting column (14) having a diameter corresponding to the clamping opening (13), the first assembly (11) and the second assembly (12) clamping the mounting column (14) at the clamping opening (13), and the access hole (100) is opened thereon; A driving component is connected to the first assembly (11) and / or the second assembly (12) to drive the combination of the two to form the sealed chamber (10) or to open the sealed chamber (10).

3. The nozzle plugging device according to claim 2, characterized in that: The two ends of the mounting column (14) extend to the inside and outside of the movable box respectively; the access hole (100) is arranged on the end surface of the mounting column (14) extending into the movable box; a placement cavity (140) is arranged inside the mounting column (14); the placement cavity (140) is communicated with the access hole (100) and has an inner diameter larger than that of the access hole (100); the placement cavity (140) is openly arranged at the other end surface of the mounting column (14).

4. The nozzle plugging device according to claim 2, characterized in that: The drive assembly comprises: a first ejection mechanism (15), connected to the first assembly (11) and used for driving the first assembly (11) to move closer to or away from the mounting column (14); A second ejection mechanism (16) is connected to the second assembly (12) and is used to drive the second assembly (12) to move closer to or away from the mounting column (14).

5. The nozzle plugging device according to claim 2, characterized in that: Sealing pads (17) are provided on the peripheries of the first assembly (11) and the second assembly (12) for contacting the mounting column (14) and for contacting each other.

6. A scrubber strength test system, characterized in that: It comprises a scrubber and a nozzle plugging device as claimed in any one of claims 1 to 5; The scrubber comprises: Liquid storage part(3); A water spraying motor (4), which is connected to the liquid storage portion (3) and is connected to a delivery pipeline (40) for delivering washing liquid to the outside; at least one nozzle (5) connected to the water spray motor (4) via the delivery pipe (40); The nozzle blocking device is used to connect one or more of the nozzles (5).

7. A scrubber strength test method of a scrubber strength test system as claimed in claim 6, characterized in that: It includes the following steps: The relative heights of the liquid storage part (3), the water spraying motor (4) and the nozzle (5) in the scrubber are determined according to the installation position of the scrubber when it is actually used; The nozzle (5) of the scrubber is connected to the sealed chamber (10) in a sealed manner, and the air pressure in the sealed chamber (10) is adjusted to a set value P o ; The water spray motor (4) is started, and a blocked-rotor test of the water spray motor (4) is performed when the nozzle (5) is blocked.

8. The scrubber strength test method according to claim 7, characterized in that: The nozzle (5) of the scrubber is sealed and connected to the sealed chamber (10), and the air pressure in the sealed chamber (10) is adjusted to a set value P o In the embodiment, if the scrubber has a plurality of nozzles (5), each nozzle (5) is connected to a closed chamber (10), and the air pressure in each closed chamber (10) is adjusted to a set value P o .

9. The scrubber strength test method according to claim 8, characterized in that: The air pressure in the sealed chamber (10) is adjusted to a set value P o middle, P e -ρgH-P air ·V t1 / (N·V o )<P o <Min[P e -ρgh+(P e -ρgh-P air )·V t1 / (N· In o ),P e ]; Among them, P e is the stalled output pressure of the water spray motor (4); ρ is the density of the washing liquid in the liquid storage portion (3); g is the acceleration due to gravity; H is the vertical height of the nozzle of the nozzle (5) relative to the water outlet of the water spray motor (4); P air is the ambient air pressure outside the closed chamber (10); h is the vertical height of the maximum storage liquid level of the liquid storage portion (3) relative to its water outlet; V t1 is the residual volume of the washing liquid in the liquid delivery pipeline when the liquid level height is h; N is the number of closed chambers (10) connected to the washing device; V O is the volume of the closed chamber (10).

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