Liquid Penetration Test Equipment

Abstract

The present invention relates to a liquid penetration testing device, which is used to detect the liquid penetration performance parameters of a test sample. The testing device includes: a device body, which is equipped with an electromagnetic device, a liquid outlet channel and a liquid inlet channel connected to the liquid outlet channel, the aperture of the liquid inlet channel is larger than the aperture of the liquid outlet channel, and the liquid inlet channel is used to accommodate a standard volume of test liquid. A base is used to place the test sample. A detection device is equipped with a liquid sensing component located in the extension direction of the liquid outlet channel, and the detection device is used to superimpose and flatten the test sample. A control device is connected to the electromagnetic device and the liquid sensing component. The electromagnetic device controls the opening of the liquid outlet channel according to the control instruction of the controlled device, the liquid sensing component detects the test liquid and outputs an electrical signal to the control device, and the control device calculates the time for the test liquid to penetrate into the test sample according to the electrical signal.

Description

Technical Field

[0001] The invention relates to the field of testing technology, and in particular to a liquid penetration testing device. Background Art

[0002] Liquid penetration test equipment is used to measure the penetration performance of sanitary products such as sanitary napkins, sanitary pads, diapers / sheets, etc. The test principle is: the test sample is unfolded in a natural state and placed on a large enough filter paper with known mass and placed under the liquid outlet channel of the liquid penetration test equipment. The test liquid in the liquid outlet channel flows freely to the surface of the test sample at the valve opening. After the standard amount of test liquid has finished flowing out. Then take out the filter paper and the test sample, and measure the weight of the filter paper to obtain the measurement difference of the filter paper, which represents the penetration quality of the test sample.

[0003] However, the residual amount of the test liquid in the liquid delivery channel of the existing liquid penetration test device is uncertain, which affects the test results. In addition, the flow time detection accuracy of the test liquid in the existing liquid penetration test device is low, so it needs to be improved. Summary of the invention

[0004] The object of the present invention is to provide a liquid penetration testing device.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A liquid penetration test device is provided for detecting liquid penetration performance parameters of a test sample, the test device comprising:

[0007] The device body is provided with an electromagnetic device, a liquid outlet channel and a liquid inlet channel connected to the liquid outlet channel, the aperture of the liquid inlet channel is larger than the aperture of the liquid outlet channel, and the liquid inlet channel is used to receive a standard volume of test liquid;

[0008] A base, used for placing the test sample;

[0009] A detection device, configured with a liquid sensing component located in the extension direction of the liquid outlet channel, the detection device is used to superimpose and flatten the test sample;

[0010] A control device connected to the electromagnetic device and the liquid sensing component;

[0011] The electromagnetic device controls the opening of the liquid outlet channel according to the control instruction of the controlled device, the liquid sensing component detects the test liquid and outputs an electrical signal to the control device, and the control device calculates the time for the test liquid to penetrate into the test sample according to the electrical signal.

[0012] In one embodiment, the electromagnetic device includes an electromagnetic component electrically connected to the control device and a valve core component slidably connected to the liquid inlet channel, the valve core component closes the liquid outlet channel, the electromagnetic component surrounds the liquid outlet channel and is magnetically inductively connected to the valve core component to drive the valve core component to slide along the liquid inlet channel.

[0013] In one embodiment, the valve core assembly includes a valve stem slidably connected to the liquid inlet channel and a magnetic component disposed in the valve stem, and the magnetic component is magnetically inductively connected to the electromagnetic assembly.

[0014] In one embodiment, the valve stem includes a sliding portion, and an outer peripheral wall of the sliding portion is provided with one or more guide grooves, and the guide grooves extend from one end of the sliding portion to the other end.

[0015] In one embodiment, the device body includes a casing and a guide member installed on the casing, the liquid outlet channel and the liquid inlet channel are arranged on the guide member, the electromagnetic component surrounds the outside of the guide member and is located inside the casing, the valve core component is slidably connected to the guide member, and the detection device is installed on the casing.

[0016] In one embodiment, the surfaces of the liquid outlet channel and the liquid inlet channel are composited with a hydrophobic coating made of a hydrophobic material; or, the flow guide is made of the hydrophobic material.

[0017] In one embodiment, the device body further comprises a limit assembly mounted on the housing, the limit assembly protrudes toward the base, and the detection device is abutted and limited by the limit assembly.

[0018] In one embodiment, the device body further comprises a core removing member detachably mounted on the device body, the core removing member is provided with a magnetic adsorption member, and the magnetic adsorption member is used to absorb the valve core assembly out of the liquid inlet channel.

[0019] In one embodiment, the detection device includes a standard pressure block and probes arranged opposite to each other in the pressure block, the standard pressure block includes a penetrating detection hole, the end of the probe extends toward the detection hole, and the probe is electrically connected to the control device.

[0020] In one embodiment, the testing device comprises a guide column fixed to the base, and the device body is slidably connected to the guide column.

[0021] Beneficial effects of the present invention: The electromagnetic device is used to control the opening and closing of the liquid outlet channel to reduce the structural complexity of the liquid inlet channel and the liquid outlet channel and avoid residual test liquid. A standard amount of test liquid can flow out of the liquid outlet channel within a standard time, and the test result is accurate. The electromagnetic device is linked with the detection device to calculate the circulation time of the test liquid, and the detection accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the liquid penetration testing device in the present invention.

[0024] Figure 2 It is a partial cross-sectional structural schematic diagram of the liquid penetration testing device in the present invention.

[0025] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0026] Figure 4 It is a schematic diagram of the top view of the test device in the present invention.

[0027] Figure 5 It is a schematic cross-sectional structural diagram of the detection device in the present invention.

[0028] In the figure: the device body 10; the liquid outlet channel 11; the step surface 111; the liquid inlet channel 12; the casing 13; the guide member 14; the limit assembly 15; the first limit frame 151; the connecting member 152; the core member 16; the magnetic adsorption member 161; the printer 17; the base 20; the guide column 21; the detection device 30; the detection hole 31; the probe 32; the standard pressure block 33; the signal connector 34; the electromagnetic device 40; the valve core assembly 41; the magnetic member 411; the valve stem 412; the guide groove 4121; the sealing part 4122; the electromagnetic assembly 42; the control device 50; the display assembly 51; the test sample 50. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0030] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is 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. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term 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 an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 and Figure 2 As shown, the present invention discloses a liquid penetration test device, which is used to detect the liquid penetration performance parameters of a test sample 50. The test device includes: a device body 10, a base 20, a detection device 30 and a control device 50, and the device body 10 is installed on the base 20 so that the two form an integral structure. Alternatively, the device body 10 and the base 20 are both installed on an operating platform to move together. Optionally, the test device includes a guide column 21 fixed to the base 20, and the device body 10 is slidably connected to the guide column 21 so that the distance between the device body 10 and the base 20 is adjustable, thereby improving the convenience of the test.

[0034] The device body 10 is provided with an electromagnetic device 40, a liquid outlet channel 11 and a liquid inlet channel 12 connected to the liquid outlet channel 11, the aperture of the liquid inlet channel 12 is larger than the aperture of the liquid outlet channel 11, and the liquid inlet channel 12 is used to accommodate a standard volume of test liquid. The liquid outlet channel 11 is used to output the test liquid, and the liquid inlet channel 12 is used to add and hold the test liquid, so that when the electromagnetic device 40 is running, the test liquid in the liquid inlet channel 12 is output within a standard time. Optionally, the liquid inlet channel 12 is coaxial with the liquid outlet channel 11 to improve the continuity of the circulation of the test liquid. A step surface 111 is formed between the liquid inlet channel 12 and the liquid outlet channel 11, and the electromagnetic device 40 slides against the closed step surface 111 to close or open the liquid outlet channel 11, which is easy to operate. Optionally, the step surface 111 is configured as a conical surface to improve the stability of the seal and the stability of the sliding guide.

[0035] The base 20 is used to place the test sample 50, and the base 20 is placed on a rigid platform to keep the plane on which the test sample 50 is placed in a horizontal state. The detection device 30 is configured with a liquid sensing component located in the extension direction of the liquid outlet channel 11, and the detection device 30 is used to superimpose and flatten the test sample 50. Optionally, the bottom of the base 20 is configured with an adjustment foot, and the adjustment foot is used to fine-tune the horizontality of the base 20. The test sample 50 is located in the extension direction of the liquid outlet channel 11 and is flattened by the detection device 30 to be in a flat unfolded state, which meets the requirements of national standards. The detection device 30 is configured with a through detection hole 31, and the detection hole 31 is used to guide the detection liquid to flow into the test sample 50. Optionally, the center line of the detection hole 31 coincides with the center line of the liquid outlet channel 11.

[0036] The control device 50 is connected to the electromagnetic device 40 and the liquid sensing component. The electromagnetic device 40 controls the opening of the liquid outlet channel 11 according to the control instruction of the controlled device 50. The liquid sensing component detects the test liquid and outputs an electrical signal to the control device 50. The control device 50 calculates the time for the test liquid to penetrate into the test sample 50 according to the electrical signal.

[0037] The electromagnetic device 40 is used to control the opening and closing of the liquid outlet channel 11 to reduce the structural complexity of the liquid inlet channel 12 and the liquid outlet channel 11 and avoid residual test liquid. A standard amount of test liquid can flow out of the liquid outlet channel 11 within a standard time, and the test result is accurate. The electromagnetic device 40 is linked with the detection device 30 to calculate the circulation time of the test liquid, and the detection accuracy is high.

[0038] like Figure 2 and Figure 3As shown, the electromagnetic device 40 includes an electromagnetic assembly 42 electrically connected to the control device 50 and a valve core assembly 41 slidably connected to the liquid inlet channel 12, and the valve core assembly 41 closes the liquid outlet channel 11. The electromagnetic assembly 42 surrounds the liquid outlet channel 11 and is magnetically inductively connected to the valve core assembly 41 to drive the valve core assembly 41 to slide along the liquid inlet channel 12. The electromagnetic assembly 42 forms a magnetic driving force according to the control signal output of the control device 50 to drive the valve core assembly 41 to move, thereby opening the liquid outlet channel 11. The test liquid in the liquid inlet channel 12 flows into the liquid inlet channel 12 along the space between the valve core assembly 41 and the liquid inlet channel 12. Optionally, the electromagnetic assembly 42 includes a coil group distributed around the liquid inlet channel 12, and the coil group forms a magnetic field when powered on to drive the valve core assembly 41 to move, which is convenient for control. Optionally, the control device 50 outputs a pulse signal to the electromagnetic assembly 42 so that the electromagnetic assembly 42 outputs a fluctuating magnetic field. The valve core assembly 41 reciprocates in the fluctuating magnetic field to promote the circulation speed and smoothness of the test liquid. Specifically, the valve core assembly 41 reciprocates along the liquid inlet channel 12 under the combined action of the upward magnetic field force and the downward gravity, thereby forming a driving force during the circulation of the test liquid and avoiding the residual test liquid, thereby improving the detection accuracy.

[0039] The valve core assembly 41 is connected to the electromagnetic assembly 42 by magnetic induction, wherein the valve core assembly 41 includes a valve stem 412 slidably connected to the liquid inlet channel 12 and a magnetic member 411 disposed in the valve stem 412, and the magnetic member 411 is connected to the electromagnetic assembly 42 by magnetic induction. The magnetic member 411 is configured as a columnar permanent magnet, and the valve stem 412 is wrapped outside the magnetic member 411 to prevent the magnetic member 411 from contacting the test liquid. Optionally, the magnetic member 411 is configured as a columnar magnet, such as the magnetic member 411 is configured as a cylindrical or prismatic shape. The center line of the magnetic member 411 coincides with the center line of the valve stem 412, so that the weight distribution of the valve core assembly 41 is balanced, thereby improving the smoothness of the sliding of the valve core assembly 41.

[0040] like Figure 2 , Figure 3 and Figure 4As shown, the valve stem 412 slides with the liquid inlet channel 12 and one end of the valve stem 412 can close the opening of one end of the liquid outlet channel 11, so as to realize the controllable timing of the circulation of the test liquid. In one embodiment, the valve stem 412 includes a sliding portion, and the outer peripheral wall of the sliding portion is provided with one or more guide grooves 4121, and the guide grooves 4121 extend from one end of the sliding portion to the other end. The sliding portion and the liquid inlet channel 12 cooperate with each other so that the valve stem 412 slides back and forth along the center line direction of the liquid inlet channel 12. Among them, the diameter of the circumscribed circle of the sliding portion is slightly smaller than the inner diameter of the liquid inlet channel 12, so that the valve stem 412 slides linearly without shaking. The guide grooves 4121 are distributed at intervals on the outer peripheral wall of the sliding portion to guide the circulation of the test liquid. Optionally, two or more guide grooves 4121 are provided, and are evenly distributed on the outer peripheral wall of the sliding portion. For example, three, four, five, etc. guide grooves 4121 are provided. The guide groove 4121 is a concave arc groove to prevent the test liquid from remaining. Optionally, the guide groove 4121 is set as a straight line structure and is parallel to the center line of the sliding part. Alternatively, the guide groove 4121 is inclined relative to the center line of the sliding part to form a spiral structure.

[0041] One end of the sliding portion abuts against the step surface 111 of the liquid inlet channel 12 and the liquid outlet channel 11. The valve stem 412 also includes a sealing portion 4122 partially protruding from one end of the sliding portion, and the sealing portion 4122 abuts against and seals the liquid outlet channel 11. The sealing portion 4122 is arranged at one end of the sliding portion, and is used to adapt and seal the liquid inlet channel 12. Optionally, part of the hole wall at one end of the liquid inlet channel 12 is set as an inverted cone-shaped sealing surface, and the sealing portion 4122 is configured as a frustum structure to be correspondingly plugged into the liquid inlet channel 12 and seal with the sealing surface. Optionally, the other end of the sliding portion is set as a spherical surface or a curved surface to avoid residual test liquid. The magnetic part 411 is located in the sliding portion to improve the overall center of gravity position of the valve core assembly 41, and to improve the reliability of the valve core assembly 41 in closing the liquid outlet channel 11 by its own weight.

[0042] In order to prevent the test liquid from being adsorbed on the surface of the valve stem 412 by surface tension, in an optional embodiment, the valve stem 412 is made of a hydrophobic material, such as the entire valve stem 412 is made of polytetrafluoroethylene material. Alternatively, the surface of the valve stem 412 is coated with a hydrophobic material, such as a surface composite polytetrafluoroethylene coating, to prevent residual adsorption of the test liquid.

[0043] In one embodiment, the device body 10 includes a housing 13 and a flow guide 14 installed on the housing 13, and the liquid outlet channel 11 and the liquid inlet channel 12 are arranged on the flow guide 14. The electromagnetic component 42 surrounds the outside of the flow guide 14 and is located in the housing 13, the valve core component 41 is slidably connected to the flow guide 14, and the detection device 30 is installed on the housing 13.

[0044] like Figure 2 and Figure 3 As shown, the housing 13 is set as a rigid frame structure, and the guide member 14 is installed on the housing 13 and passes through from one end of the housing 13 to the other end to facilitate the addition of the test liquid. Optionally, the guide member 14 is a tubular structure to be installed on the housing 13. The electromagnetic assembly 42 is distributed around the guide member 14, and the valve core assembly 41 is slidably connected to the guide member 14. The electromagnetic assembly 42 is located below the valve core assembly 41, so that the magnetic field force generated by the electromagnetic assembly 42 pushes the valve core assembly 41 to move away from the liquid outlet channel 11. Optionally, the outer peripheral wall of the guide member 14 is provided with a step surface or an annular groove for installing the electromagnetic assembly 42 to improve the accuracy of the installation. Optionally, the surface of the liquid outlet channel 11 and the liquid inlet channel 12 is composited with a hydrophobic coating made of a hydrophobic material, such as a polytetrafluoroethylene coating on the surface to avoid residual adsorption of the test liquid. Or, the guide member 14 is made of the hydrophobic material, such as the guide member 14 is made of polytetrafluoroethylene material as a whole.

[0045] The control device 50 is installed on the housing 13 to improve the convenience of operation and the overall aesthetics. Optionally, the control device 50 includes a control panel and a display component 51 connected to the control panel, and the display component 51 is installed on the housing 13 to facilitate the output of visualized parameter information. Optionally, the control device 50 includes an operation button, which is used to control the operation of the magnetic device and output control information to the control panel. Optionally, the control device 50 also includes an external expansion interface, which is connected to the detection device 30 through a signal line to transmit signals and improve the stability of signal transmission.

[0046] In one embodiment, the device body 10 also includes a limit assembly 15 installed on the housing 13, the limit assembly 15 protrudes toward the base 20, and the detection device 30 is abutted against the limit assembly 15. The limit assembly 15 extends from the housing 13 to the base 20 to limit the installation position of the detection device 30. Optionally, the limit assembly 15 includes a connector 152 connected to the housing 13 and a first limit frame 151 and a second limit frame arranged on the connector 152, and the first limit frame 151 and the second limit frame are obliquely intersected to define different edges of the detection device 30. Optionally, the protruding direction of the first limit frame 151 is perpendicular to the protruding direction of the second limit frame to form a right-angle positioning structure. Further, the limit assembly 15 also includes a third limit frame connected to the first limit frame 151, and the third limit frame is arranged relative to the second limit frame. The first limiting frame 151, the second limiting frame and the third limiting frame form a positioning structure approximately in the shape of a "U" to limit the range of movement of the detection device 30, with high positioning accuracy.

[0047] like Figure 2 and Figure 5As shown, the detection device 30 includes a standard pressure block 33 and two probes 32 arranged opposite to each other in the pressure block, and the standard pressure block 33 includes a penetrating detection hole 31. The end of the probe 32 extends toward the detection hole 31, and the probe 32 is electrically connected to the control device 50. The probe 32 is used to detect the circulation time of the test liquid, wherein when the test liquid circulates, the two probes 32 are connected and output electrical signals. When the test liquid is output, the passage between the two probes 32 is disconnected. Optionally, the standard pressure block 33 is configured as a square columnar structure. For example, the standard pressure block 33 is a square pressure block made of acrylic material. Optionally, the detection device 30 includes a signal connector 34 arranged on the standard pressure block 33, and the probe 32 is connected to the signal connector 34, and then connected to the signal line through the signal connector 34.

[0048] In one embodiment, the device body 10 further includes a printer 17 installed on the housing 13, and the printer 17 is electrically connected to the control device 50. The printer 17 is used to print out the detection results and corresponding parameter information of the control device 50 to correspond to the test sample 50, and the corresponding effect is good.

[0049] In one embodiment, the device body 10 further includes a core removing member 16 detachably mounted on the housing 13, and the core removing member 16 is provided with a magnetic adsorption member 161, and the magnetic adsorption member 161 is used to absorb the valve core assembly 41 from the liquid inlet channel 12. The core removing member 16 is provided with a magnetic adsorption member 161, and the magnetic adsorption member 161 can be configured as a magnet, a magnet, an electromagnetic coil, etc. The core removing member 16 extends into the liquid inlet channel 12 and is magnetically adsorbed and connected to the valve core assembly 41 to remove the valve core assembly 41, which is easy to operate. Optionally, the core removing member 16 is spirally connected to the housing 13 so that the core removing member 16 remains connected to the housing 13 when not in use, thereby improving the convenience of use and preventing it from falling off.

[0050] It should be noted that the above specific implementations are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these changes do not deviate from the spirit of the present invention, they should be within the scope of protection of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. A liquid penetration test device for detecting liquid penetration performance parameters of a test sample, characterized in that: The test equipment includes: The device body is provided with an electromagnetic device, a liquid outlet channel and a liquid inlet channel connected to the liquid outlet channel, the aperture of the liquid inlet channel is larger than the aperture of the liquid outlet channel, and the liquid inlet channel is used to receive a standard volume of test liquid; A base, used for placing the test sample; A detection device, configured with a liquid sensing component located in the extension direction of the liquid outlet channel, the detection device is used to superimpose and flatten the test sample; A control device connected to the electromagnetic device and the liquid sensing component; The electromagnetic device controls the opening of the liquid outlet channel according to the control instruction of the controlled device, the liquid sensing component detects the test liquid and outputs an electrical signal to the control device, and the control device calculates the time for the test liquid to penetrate into the test sample according to the electrical signal; The electromagnetic device comprises an electromagnetic component electrically connected to the control device and a valve core component slidably connected to the liquid inlet channel, the valve core component closes the liquid outlet channel, the electromagnetic component surrounds the liquid outlet channel and is magnetically connected to the valve core component to drive the valve core component to slide along the liquid inlet channel, wherein the control device outputs a pulse signal to the electromagnetic component so that the electromagnetic component outputs a fluctuating magnetic field, and the valve core component reciprocates along the liquid inlet channel under the combined action of the upward magnetic field force and the downward gravity; The valve core assembly comprises a valve stem slidably connected to the liquid inlet channel and a magnetic member disposed in the valve stem, wherein the magnetic member is magnetically inductively connected to the electromagnetic assembly; The valve stem comprises a sliding portion, the outer peripheral wall of the sliding portion is provided with one or more guide grooves, and the guide grooves extend from one end of the sliding portion to the other end; The sliding part cooperates with the liquid inlet channel to enable the valve stem to slide back and forth along the center line direction of the liquid inlet channel, wherein the circumscribed circle diameter of the sliding part is slightly smaller than the inner diameter of the liquid inlet channel, so that the valve stem slides in a straight line without shaking, and the guide grooves are distributed at intervals on the outer peripheral wall of the sliding part to guide the flow of the test liquid.

2. The liquid penetration test device according to claim 1, characterized in that: The device body includes a casing and a flow guide installed on the casing, the liquid outlet channel and the liquid inlet channel are arranged on the flow guide, the electromagnetic component surrounds the outside of the flow guide and is located in the casing, the valve core component is slidably connected to the flow guide, and the detection device is installed on the casing.

3. The liquid penetration testing device according to claim 2, characterized in that: The surfaces of the liquid outlet channel and the liquid inlet channel are composited with a hydrophobic coating made of a hydrophobic material; or, the flow guide is made of the hydrophobic material.

4. The liquid penetration testing device according to claim 2, characterized in that: The device body also includes a limit assembly installed on the housing, the limit assembly protrudes toward the base, and the detection device is abutted and limited by the limit assembly.

5. The liquid penetration testing device according to claim 1, characterized in that: The device body also includes a core removing member detachably mounted on the device body, wherein the core removing member is provided with a magnetic adsorption member, and the magnetic adsorption member is used to absorb the valve core assembly from the liquid inlet channel.

6. The liquid penetration testing device according to claim 1, characterized in that: The detection device includes a standard pressing block and probes arranged opposite to each other in the standard pressing block. The standard pressing block includes a penetrating detection hole. The end of the probe extends toward the detection hole. The probe is electrically connected to the control device.

7. The liquid penetration testing device according to claim 1, characterized in that: The testing device comprises a guide column fixed to the base, and the device body is slidably connected to the guide column.

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