Foam performance testing device and method for hydraulic transmission medium

Abstract

The invention discloses a foam performance test device and method for a hydraulic transmission medium. The foam performance test device for the hydraulic transmission medium comprises a frame body, and a balancing weight, an injector and a container which are sequentially arranged from top to bottom, the injector is connected with the frame body and comprises a needle cylinder, a needle head and a push rod, the needle head is detachably connected with the needle cylinder, the needle cylinder is provided with an injection cavity used for containing liquid to be detected, the needle head is provided with a downward jet orifice, the jet orifice is communicated with the injection cavity, and the piston push rod is slidably arranged in the injection cavity. The container is provided with a containing cavity used for containing the liquid to be detected, the containing cavity is provided with an upward cavity opening, and the cavity opening is formed in the lower side of the injection opening. According to the foam performance testing device for the hydraulic transmission medium, the use working condition that the hydraulic transmission medium generates foam under impact can be simulated, and the accuracy of a test result is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic transmission medium performance test devices, and in particular to a foam performance test device and method for hydraulic transmission medium. Background Art

[0002] Hydraulic transmission media are typically emulsified oils or concentrated liquids, suitable for use in hydraulic equipment such as hydraulic supports and hydraulic struts. They perform functions such as power transmission, rust prevention, and lubrication in fully mechanized mining systems. Hydraulic transmission media often contain surfactants with varying properties. Some surfactants, in addition to their rust prevention and lubrication properties, can also easily foam under impact or other disturbances. Therefore, defoaming agents are often added to hydraulic transmission media formulations. Testing is required to verify the defoaming properties of hydraulic transmission media.

[0003] The conventional method for testing the foam performance of hydraulic transmission media is the manual shaking method. Specifically, the hydraulic transmission media is poured into a graduated cylinder, the opening of which is sealed. The tester then shakes the cylinder up and down for 1 minute, then lets it rest for 10 minutes. The tester then observes the disappearance of the foam and records the volume of the remaining foam. This test method is conducted under oscillating conditions, which is inconsistent with the actual operating conditions of hydraulic transmission media, where foam is generated on the liquid surface due to the impact of liquid on the tank. Furthermore, the oscillation effect is affected by the tester's operating technique, resulting in test results that do not accurately reflect the foam performance of the hydraulic transmission media. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes a foam performance testing device for hydraulic transmission media, which can simulate the operating conditions of hydraulic transmission media generating foam under impact, and is less dependent on the operating techniques of the test personnel, making the test results more accurate.

[0006] The foam performance testing device for hydraulic transmission media of an embodiment of the present invention includes a frame and a counterweight block, a syringe and a container arranged in sequence from top to bottom; the syringe is connected to the frame, and the syringe includes a syringe, a needle and a push rod. The needle is detachably connected to the syringe, and the syringe has an injection chamber for accommodating the liquid to be tested. The needle has a downwardly arranged injection port, and the injection port is connected to the injection chamber. The piston push rod is slidably provided in the injection chamber to drive the liquid to be tested in the injection chamber to be ejected from the injection port by using the piston push rod. The container has a accommodating chamber for accommodating the liquid to be tested, and the accommodating chamber has a cavity opening arranged upward, and the cavity opening is arranged on the lower side of the injection port.

[0007] In some embodiments, the foam performance testing device further includes a limiting cylinder having a limiting channel for the counterweight block to slide up and down, and a center line of the limiting channel coincides with a center line of the push rod.

[0008] In some embodiments, the foam performance testing device also includes a traction rope and a fixed pulley, the fixed pulley is connected to the frame and / or the limiting cylinder, the traction rope is wound around the fixed pulley, the first end of the traction rope is connected to the counterweight block, and the second end of the traction rope is detachably connected to the frame.

[0009] In some embodiments, the container is cylindrical and extends up and down, and the center point of the injection port coincides with the center line of the container.

[0010] In some embodiments, the syringe has first scale lines arranged from top to bottom, and the container has second scale lines arranged from top to bottom.

[0011] In some embodiments, the needle is detachably connected to the barrel.

[0012] In some embodiments, the frame includes support rods extending up and down, and the foam performance testing device includes a first connecting frame, a second connecting frame and a third connecting frame connected to the support rods in sequence from top to bottom, the limiting cylinder is connected to the first connecting frame, the syringe is connected to the second connecting frame, and the container is connected to the third connecting frame.

[0013] In some embodiments, the first connecting frame, the second connecting frame and the third connecting frame are all detachably connected to the support rod;

[0014] The limiting cylinder is detachably connected to the first connecting frame, the syringe is detachably connected to the second connecting frame, and the container is detachably connected to the third connecting frame.

[0015] In some embodiments, the foam performance testing device further includes a timer connected to the frame.

[0016] An embodiment of the present invention uses the foam performance test device described in any of the above embodiments, and the foam performance test method includes the following steps:

[0017] Injecting the hydraulic transmission medium to be tested into the injection cavity and the accommodating cavity;

[0018] Arrange the counterweight, the syringe, and the container in sequence from top to bottom, with the counterweight in contact with the plunger of the syringe;

[0019] Controlling the free fall of the counterweight to push the push rod downward, so that the liquid to be tested in the injection cavity is sprayed into the receiving cavity, mixed with the liquid to be tested in the receiving cavity and generates impact foam;

[0020] When the push rod moves downward to a preset position, the initial volume of the impact foam is recorded;

[0021] The foam in the container is observed, and the volumes of the impact foam at the first preset time point, the second preset time point, ..., the Nth preset time point, and the time point when the volume of the impact foam is zero are recorded respectively.

[0022] The foam performance testing device of the embodiment of the present invention uses a syringe to spray the liquid to be tested into the accommodating chamber and mixes it with the liquid to be tested in the accommodating chamber to generate foam, which can simulate the operating conditions of the hydraulic transmission medium generating foam under impact; by changing the weight of the counterweight block and the aperture of the needle, the working conditions of the hydraulic transmission medium under different pressure shocks can be simulated, and it is less dependent on the operating techniques of the test personnel, the test is highly operable and the results are more reproducible, thereby making the test results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a foam performance testing device according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] 100. Foam performance test device;

[0026] 1. Frame; 11. Base; 12. Support rod;

[0027] 2. Counterweight;

[0028] 3. Syringe; 31. Syringe; 32. Needle; 321. Injection port; 33. Push rod;

[0029] 4. Container; 41. Cavity;

[0030] 5. Limiting cylinder;

[0031] 61. Traction rope; 611. Third clamp; 62. Fixed pulley;

[0032] 71. First connecting frame; 72. Second connecting frame; 73. Third connecting frame; 74. Connecting rod; 75. First clamp; 76. Second clamp;

[0033] 8. Timer. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] like Figure 1 As shown, the foam performance testing device 100 for hydraulic transmission medium according to an embodiment of the present invention includes a frame 1 and a counterweight block 2, a syringe 3 and a container 4 arranged in sequence from top to bottom; the syringe 3 is connected to the frame 1, and the syringe 3 includes a syringe 31, a needle 32 and a push rod 33. The needle 32 is detachably connected to the syringe 31. The syringe 31 has an injection cavity for accommodating a liquid to be tested. The needle 32 has a downwardly arranged injection port 321, and the injection port 321 is connected to the injection cavity. The piston push rod 33 is slidably provided in the injection cavity to drive the liquid to be tested in the injection cavity to be ejected from the injection port 321 by using the piston push rod 33. The container 4 has a accommodating cavity for accommodating a liquid to be tested. The accommodating cavity has a cavity opening 41 arranged upward, and the cavity opening 41 is arranged on the lower side of the injection port 321.

[0036] The foam performance testing device 100 of the embodiment of the present invention first injects the liquid to be tested into the injection chamber and the receiving chamber, and then arranges the counterweight 2, the syringe 3 and the receiving container in sequence from top to bottom, and the counterweight 2 contacts the push rod 33 of the syringe 3, and then controls the counterweight 2 to fall freely to push the push rod 33 to move downward relative to the syringe, so that the medium to be transmitted in the injection chamber is sprayed into the receiving chamber, impacting the liquid to be tested in the receiving chamber and generating impact foam; when the push rod 33 moves downward to a preset position (all the liquid to be tested in the injection chamber is sprayed into the receiving chamber), the initial volume of the impact foam is recorded, and then the foam in the receiving chamber is observed, and the volumes of the impact foam at the first preset time point, the second preset time point...the Nth preset time point and the time point when the volume of the impact foam is zero are recorded respectively, thereby obtaining the maximum foaming volume of the liquid to be tested under the impact force (i.e., the initial volume of the impact foam) and the time required for the foam to disappear, and then judging the foam performance of the liquid to be tested.

[0037] The foam performance testing device 100 of the embodiment of the present invention sprays the liquid to be tested into the accommodating chamber through the syringe 3 and mixes it with the liquid to be tested in the accommodating chamber to generate foam, which can simulate the operating conditions of the hydraulic transmission medium generating foam under impact, and is more in line with; by changing the weight of the counterweight block 2 and the aperture of the needle 32, the working conditions of the hydraulic transmission medium under different pressure shocks can be simulated, and the test process is less dependent on the operating techniques of the test personnel, the test operability is strong and the results are more reproducible, thereby making the test results more accurate.

[0038] In addition, the overall structure of the foam performance testing device 100 of the embodiment of the present invention is relatively simple, and each part can be easily disassembled and assembled flexibly, and the operation is relatively convenient.

[0039] It is understandable that the liquid to be tested is an emulsified oil or concentrated liquid used in hydraulic equipment such as hydraulic supports and hydraulic struts; optionally, the liquid to be tested is configured by mixing the emulsified oil with water at a mass ratio of more than 90% to form an oil-in-water emulsion, or mixing the concentrated liquid with water at a mass ratio of more than 90% to form a solution-type dilution.

[0040] Optionally, the syringe 3 and the container 4 are both made of transparent materials, such as glass, plastic steel or plastic.

[0041] This makes it easier for the tester to observe the injection of the test liquid in the syringe 3 and the foaming and defoaming conditions in the container 4 .

[0042] Optionally, the counterweight 2 is a weight, and there are multiple weights, each weighing 500g, 1kg, 2kg, 5kg, etc., meeting the standard requirements of GB / T 4167 "Weights." During the foam performance test, weights of varying weights can provide varying thrusts to the plunger 33 of the syringe 3, causing the test liquid within the syringe 3 to be ejected. These weights, when combined with needles 32 of varying apertures, can simulate operating conditions under varying pressure shocks, generate multiple sets of test data, and thereby improve the accuracy of the experiment.

[0043] Specifically, if Figure 1 As shown, the frame 1 includes a base 11 and a support rod 12. The base 11 is placed on the ground or other supporting platform. The support rod 12 extends vertically and the lower end is fixedly connected to the base 11. The container 4, syringe 3 and counterweight 2 are arranged in sequence from bottom to top and are all connected to the support rod 12.

[0044] In some embodiments, the foam performance testing device 100 further includes a limiting cylinder 5 , which has a limiting channel for the counterweight 2 to slide up and down, and a center line of the limiting channel coincides with a center line of the push rod 33 .

[0045] The limiting channel can limit the sliding direction of the counterweight 2, so that the counterweight 2 slides vertically downward, and can apply a vertical downward thrust to the push rod 33, so that the liquid to be tested in the injection cavity is sprayed vertically downward into the accommodating cavity.

[0046] Optionally, the limiting cylinder 5 is made of a transparent material, such as glass, plastic steel or plastic.

[0047] This makes it easier for testers to observe the movement of the counterweight 2 .

[0048] Of course, in other embodiments, the limiting cylinder 5 may also be made of a non-transparent material, such as metal.

[0049] Specifically, if Figure 1 As shown, the limiting cylinder 5 is cylindrical and extends vertically, and the inner cavity of the limiting cylinder 5 forms the above-mentioned limiting channel; the counterweight block 2 is cylindrical, and the diameter of the limiting channel is slightly larger than the outer diameter of the counterweight block 2.

[0050] In some embodiments, as Figure 1 As shown, the foam performance testing device 100 also includes a traction rope 61 and a fixed pulley 62. The fixed pulley 62 is connected to the frame 1 and / or the limiting cylinder 5. The traction rope 61 is wound around the fixed pulley 62. The first end of the traction rope 61 is connected to the counterweight 2, and the second end of the traction rope 61 is detachably connected to the frame 1.

[0051] When conducting a foam performance test, the traction rope 61 and the fixed pulley 62 can cooperate to limit the position of the counterweight 2, so that the counterweight 2 is arranged directly above the syringe 3, and the counterweight 2 contacts the push rod 33 of the syringe 3. Then, the second end of the traction rope 61 is disconnected from the frame 1, and the counterweight 2 falls freely under the action of its own gravity, and can apply a thrust to the push rod 33, so that the liquid to be tested in the syringe is sprayed into the accommodating chamber until the push rod 33 pushes all the liquid to be tested in the syringe into the accommodating chamber.

[0052] Optionally, the traction rope 61 is made of cotton thread, steel wire rope or glass fiber. Such materials have a certain strength and can provide better traction to the counterweight 2 to prevent breakage during the test.

[0053] Specifically, if Figure 1 As shown, the fixed pulley 62 is fixedly connected to the upper end of the limiting cylinder 5 by bolts and is arranged close to the frame 1.

[0054] In some embodiments, the container 4 is cylindrical and extends up and down, and the center point of the injection port 321 coincides with the center line of the container 4.

[0055] Specifically, if Figure 1 As shown, the container 4 is cylindrical to form a cylindrical accommodating cavity inside it, and the cavity opening 41 of the accommodating cavity is arranged upward; the limiting cylinder 5, the injector and the container 4 are arranged in sequence from top to bottom, and the center lines of the three coincide, which can ensure that the injection port 321 of the needle 32 is aligned with the center of the cavity opening 41 of the accommodating cavity, which is more conducive to the mixing of the liquid to be tested in the injector and the liquid to be tested in the container, thereby simulating the real working conditions of the hydraulic transmission medium.

[0056] In some embodiments, as Figure 1 As shown, the syringe 31 has first scale lines arranged from top to bottom, and the container 4 has second scale lines arranged from top to bottom.

[0057] Optionally, there are multiple containers 4, and the volumes of the multiple containers 4 are 50ml, 100ml, 200ml, 100ml, 500ml, etc., respectively. The container 4 is a measuring cylinder and complies with the standards of GB / T 12804 "Laboratory Glassware Measuring Cylinder" or ISO 6706 "Laboratory Plasticware-Graduated Cylinder".

[0058] Thus, a fixed amount of the liquid to be tested can be injected into the containing cavity, and the volume of the impact foam can be observed according to the second scale line on the side wall of the container 4, which is more conducive to observing and recording the defoaming process of the impact foam.

[0059] Optionally, the syringe 3 may have multiple syringe barrels, each having a capacity of 50 ml, 100 ml, 200 ml, 100 ml, 500 ml, etc., and the syringe 3 may be a disposable syringe 3 or a reusable syringe 3 as required by national or industry standards. When conducting a foam performance test, different syringes 3 may be selected to simulate operating conditions under different pressure shocks, thereby improving test accuracy.

[0060] Thus, the tester can observe the volume of the liquid to be tested in the syringe 31 through the first scale line, so as to store a fixed amount of the liquid to be tested through the syringe 31, and at the same time observe the spraying condition of the liquid to be tested through the first scale line.

[0061] In some embodiments, the needle 32 is detachably connected to the barrel 31 .

[0062] The needle 32 is detachably connected to the syringe 31, and needles 32 of different apertures can be replaced to adjust the flow rate of the liquid to be tested. By cooperating with needles 32 of different apertures and counterweights 2 of different weights, the working conditions of the hydraulic transmission medium under different pressure shocks can be simulated, making the test results more accurate.

[0063] In some embodiments, the frame 1 includes a support rod 12 extending up and down, and the foam performance testing device 100 includes a first connecting frame 71, a second connecting frame 72 and a third connecting frame 73 connected to the support rod 12 from top to bottom, the limiting cylinder 5 is connected to the first connecting frame 71, the syringe 3 is connected to the second connecting frame 72, and the container 4 is connected to the third connecting frame 73.

[0064] In some embodiments, the first connecting frame 71, the second connecting frame 72 and the third connecting frame 73 are all detachably connected to the support rod 12; the limiting cylinder 5 is detachably connected to the first connecting frame 71, the syringe 3 is detachably connected to the second connecting frame 72, and the container 4 is detachably connected to the third connecting frame 73.

[0065] Specifically, if Figure 1As shown, three connecting frames are connected to the support rod 12, and the connecting frames include a connecting rod 74 and a first clamping clamp 75 and a second clamping clamp 76 provided at both ends of the connecting rod 74. The connecting frame can be detachably connected to the support rod 12 through the first clamping clamp 75, and the connecting frame can be detachably connected to the component to be fixed (limiting cylinder 5, syringe 3 or container 4) through the second clamping clamp 76.

[0066] The three connecting frames are, from top to bottom, the first connecting frame 71, the second connecting frame 72 and the third connecting frame 73. The height positions of the limiting cylinder 5, the syringe 3 and the container 4 can be adjusted through the first connecting frame 71, the second connecting frame 72 and the third connecting frame 73, so that the counterweight block 2 contacts the push rod 33, and the lower end of the needle 32 is arranged above the cavity opening 41 of the accommodating cavity.

[0067] Optionally, the second end of the traction rope 61 is detachably connected to the support rod 12 via a third clamp 611 .

[0068] Thus, the height of the second end of the traction rope 61 can be adjusted, thereby assisting in adjusting the height of the counterweight 2 so that the height of the counterweight 2 matches the height of the syringe 3 .

[0069] In other embodiments, the connecting rod 74 can be configured as a telescopic rod to adjust the distance between the counterweight 2, the syringe 3, the container 4 and the support rod 12, thereby making the center lines of the counterweight 2, the syringe 3 and the container 4 coincide.

[0070] In some embodiments, the foam performance testing device 100 further includes a timer 8 , which is connected to the frame 1 ; specifically, the timer 8 is located at the top of the support rod 12 .

[0071] By setting the timer 8, the test personnel can be assisted in recording the volume of the impact foam at the first preset time point, the second preset time point...the Nth preset time point and the time point when the impact foam volume is zero, thereby improving the convenience of recording test data.

[0072] The foam performance test method of the embodiment of the present invention adopts the foam performance test device 100 of any of the above embodiments, and the foam performance test method includes:

[0073] Inject the hydraulic transmission medium to be tested into the injection cavity and the receiving cavity;

[0074] Arrange the counterweight 2, syringe 3 and container in order from top to bottom, with the counterweight 2 in contact with the push rod 33 of the syringe 3;

[0075] The counterweight 2 is controlled to fall freely to push the push rod 33 downward, so that the liquid to be tested in the injection cavity is sprayed into the receiving cavity, mixed with the liquid to be tested in the receiving cavity and produces impact foam;

[0076] When the push rod 33 moves downward to a preset position, the maximum foaming volume of the impact foam is recorded;

[0077] The foam in the container 4 is observed, and the volumes of the impact foam at the first preset time point, the second preset time point, ..., the Nth preset time point, and the time point when the volume of the impact foam reaches zero are recorded respectively.

[0078] The foam performance test method of the embodiment of the present invention uses a syringe 3 to spray the liquid to be tested into the accommodating chamber and mix it with the liquid to be tested in the accommodating chamber to generate foam, which can simulate the operating conditions of the hydraulic transmission medium generating foam under impact, which is close to the coal mine site; by changing the weight of the counterweight block 2 and the aperture of the needle 32, the working conditions of the hydraulic transmission medium under different pressure shocks can be simulated, and the repeatability of the test process is less dependent on the operating techniques of the test personnel, the test is highly operational and the results are more reproducible, thereby making the test results more accurate.

[0079] Specifically, the steps of the foam performance test method are: first, quantitatively inject the liquid to be tested into the syringe 3 and the container 4 respectively, select a needle 32 with a suitable aperture, and install the needle 32 on the lower end of the syringe; then, install the limiting cylinder 5, the syringe 3 and the container 4 on the support rod 12 through the first connecting frame 71, the second connecting frame 72 and the third connecting frame 73 respectively, and adjust the limiting cylinder 5, the container 4 and the syringe 3 to an appropriate height; select a counterweight block 2 of appropriate weight, connect the counterweight block 2 to the support rod 12 through the traction rope 61, so that the counterweight block 2 contacts the upper end surface of the push rod 33, and the preparations for the foam test are completed.

[0080] Afterwards, the second end of the traction rope 61 is disconnected from the support rod 12, and the counterweight 2 falls freely under its own gravity and pushes the push rod 33 to move downward, and the liquid to be tested in the syringe is sprayed into the container 4, impacting the liquid to be tested in the container 4 and generating impact foam. When all the liquid to be tested in the syringe is sprayed out, the initial volume of the impact foam is recorded, and the timer 8 is pressed to start timing, and the change of the impact foam over time is recorded. The volume of the impact foam at 1min, 2min, 5min and 10min is recorded respectively, as well as the time point when the impact foam is zero, so as to obtain the maximum foaming volume and defoaming condition of the liquid to be tested, thereby judging the foam performance of the liquid to be tested.

[0081] Optionally, when conducting a foam performance test, under the same working conditions, that is, the height of all components, the weight of the weight, the syringe 3, the syringe 3 needle 32 and the measuring cylinder remain unchanged, and the amount of the liquid to be tested injected into the syringe 3 and the measuring cylinder remains unchanged, a reproducibility-related experiment can be carried out. It is generally recommended to repeat it three times.

[0082] Optionally, during a repetitive test of a hydraulic transmission medium of the same composition, the syringe 3 (including the needle 32 ) or the container 4 may be replaced to prevent the syringe 3 or the container 4 from affecting the test results.

[0083] For example, the height of all components, the weight of the counterweight 2 and the container 4 remain unchanged. Only the syringe 3 and the matching needle 32 of the same material and capacity are replaced, and the amount of the liquid to be tested injected into the syringe 3 and the container 4 remains unchanged. Then, the reproducibility experiment of the syringe 3 can be carried out. It is generally recommended to repeat three times.

[0084] For example, the height of all components, the weight of the counterweight 2, the syringe 3 and the matching needle 32 remain unchanged. Only the measuring cylinder of the same material and the same capacity is replaced, and the amount of the liquid to be tested injected into the syringe 3 and the measuring cylinder remains unchanged. Then, the reproducibility-related experiment of the measuring cylinder can be carried out. It is generally recommended to repeat it three times.

[0085] Optionally, when conducting a comparative test on the foaming properties of hydraulic transmission media with different compositions, the height of all components, the weight of the counterweight block 2, and the aperture of the needle 32 remain unchanged, and relevant experiments can be carried out by simply replacing the syringe 3, needle 32 and container 4 of the same capacity.

[0086] Specifically, first, a fixed amount of the No. 1 test liquid is injected into the syringe 3 and the container 4 respectively (for example, 50 ml of the No. 1 test liquid is injected into the syringe 3 and the container 4 respectively), and the limiting cylinder 5, the syringe 3 and the container 4 are respectively installed on the support rod 12 through the first connecting frame 71, the second connecting frame 72 and the third connecting frame 73, and the limiting cylinder 5, the counterweight 2, the container 4 and the syringe 3 are adjusted to appropriate heights so that the counterweight 2 contacts the upper end surface of the push rod 33, completing the test preparation. Release the second end of the traction rope 61, and the No. 1 test liquid is ejected from the syringe 3 to impact the liquid surface of the container 4 and generate foam. When the No. 1 test liquid in the syringe 3 is completely ejected into the container 4, record the maximum foaming volume in the container 4, and press the timer 8 at the same time to record the foam volume and the time when the foam completely disappears at 1 minute, 2 minutes, 5 minutes and 10 minutes, and the test for the No. 1 test liquid is completed.

[0087] Afterwards, the syringe 3, needle 32 and container 4 of the same capacity are replaced, and the height of all components, the weight of the counterweight and the aperture of the syringe 3 remain unchanged. The test liquid No. 2 is tested in the same steps to obtain the maximum foaming volume for the test liquid No. 2, the foam volume of the impact foam generated by the test liquid No. 2 at 1 minute, 2 minutes, 5 minutes and 10 minutes, and the time when the foam completely disappears.

[0088] Comparing the two sets of test data, the smaller the volume of residual impact foam at the same time point and the shorter the time it takes for the impact foam to completely disappear, the better the defoaming ability of the hydraulic transmission medium.

[0089] Optionally, to ensure the reproducibility of the results and to minimize the cost of consumables, a disposable syringe 3 and a disposable plastic measuring cylinder are used.

[0090] It is understandable that the above description of the foam performance testing device 100 is also applicable to the foam performance testing method, and will not be repeated here.

[0091] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to 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 invention 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 should not be understood as limiting the present invention.

[0092] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0093] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0094] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0095] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0096] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A foam performance test device for hydraulic transmission medium, characterized in that: It includes a frame and a counterweight, a syringe and a container arranged in sequence from top to bottom; the syringe is connected to the frame, and the syringe includes a syringe, a needle and a push rod, the needle is detachably connected to the syringe, the syringe has an injection chamber for accommodating a liquid to be tested, the needle has a downwardly arranged injection port, the injection port is connected to the injection chamber, the piston push rod is slidably provided in the injection chamber, so as to utilize the piston push rod to drive the liquid to be tested in the injection chamber to be ejected from the injection port, the container has a accommodating chamber for accommodating a liquid to be tested, the accommodating chamber has a cavity opening arranged upward, and the cavity opening is arranged on the lower side of the injection port.

2. The foam performance testing device for hydraulic transmission medium according to claim 1, characterized in that: The foam performance testing device further comprises a limiting cylinder having a limiting channel for the counterweight to slide up and down, and a center line of the limiting channel coincides with a center line of the push rod.

3. The foam performance testing device for hydraulic transmission medium according to claim 2, characterized in that: The foam performance testing device also includes a traction rope and a fixed pulley, the fixed pulley is connected to the frame and / or the limiting cylinder, the traction rope is wound around the fixed pulley, the first end of the traction rope is connected to the counterweight block, and the second end of the traction rope is detachably connected to the frame.

4. The foam performance testing device for hydraulic transmission medium according to claim 2, characterized in that: The container is cylindrical and extends up and down, and the center point of the injection port coincides with the center line of the container.

5. The foam performance testing device for hydraulic transmission medium according to claim 4, characterized in that: The syringe has first scale lines arranged from top to bottom, and the container has second scale lines arranged from top to bottom.

6. The foam performance testing device for hydraulic transmission medium according to claim 1, characterized in that: The needle is detachably connected to the syringe.

7. The foam performance testing device for hydraulic transmission medium according to any one of claims 1 to 6, characterized in that: The frame includes support rods extending up and down, and the foam performance testing device includes a first connecting frame, a second connecting frame and a third connecting frame connected to the support rods from top to bottom in sequence, the limiting cylinder is connected to the first connecting frame, the syringe is connected to the second connecting frame, and the container is connected to the third connecting frame.

8. The foam performance testing device for hydraulic transmission medium according to claim 7, characterized in that: The first connecting frame, the second connecting frame and the third connecting frame are all detachably connected to the support rod; The limiting cylinder is detachably connected to the first connecting frame, the syringe is detachably connected to the second connecting frame, and the container is detachably connected to the third connecting frame.

9. The foam performance testing device for hydraulic transmission medium according to claim 1, characterized in that: The foam performance testing device further includes a timer, which is connected to the frame.

10. A foam performance test method for hydraulic transmission media, characterized in that: Using the foam performance testing device according to any one of claims 1 to 9, the foam performance testing method comprises the following steps: Injecting the hydraulic transmission medium to be tested into the injection cavity and the accommodating cavity; Arrange the counterweight, the syringe, and the container in sequence from top to bottom, with the counterweight in contact with the plunger of the syringe; Controlling the free fall of the counterweight to push the push rod downward, so that the liquid to be tested in the injection cavity is sprayed into the receiving cavity, mixed with the liquid to be tested in the receiving cavity and generates impact foam; When the push rod moves downward to a preset position, the initial volume of the impact foam is recorded; The foam in the container is observed, and the volumes of the impact foam at the first preset time point, the second preset time point, ..., the Nth preset time point, and the time point when the volume of the impact foam is zero are recorded respectively.

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