Testing device

Abstract

The utility model discloses a testing device. The testing device comprises a frame piece, a first extrusion piece and a second extrusion piece, the second extrusion piece is slidably connected to the frame piece, the first extrusion piece is connected to the frame piece and is opposite to the second extrusion piece, and the second extrusion piece can move in the direction close to the first extrusion piece to extrude a test piece located between the first extrusion piece and the second extrusion piece. Water spraying holes are formed in the side, facing the first extrusion piece, of the second extrusion piece and used for humidifying the test piece. The first extrusion piece and the second extrusion piece extrude the test piece to test the compression recovery performance of the test piece; the water spraying holes spray water to humidify the test piece before the first extrusion piece and the second extrusion piece extrude the test piece, so that synchronous measurement of the dynamic compression recovery performance and the dehydration performance of the test piece in a wet state is realized, and the test is more suitable for the actual use condition of the test piece; and the use effect and the use period of the test piece can be better monitored and predicted on line.

Description

Technical Field

[0001] This application relates to the field of papermaking technology, and in particular to a testing device. Background Technology

[0002] In the papermaking industry, press blankets play a crucial role. They are used to transport and support wet paper, absorb moisture from the paper, compress and expel the moisture, and then repeatedly absorb moisture to dry the paper. During repeated use, the compression resilience, absorbency, and dehydration properties of press blankets gradually deteriorate, necessitating periodic replacement.

[0003] The compression recovery and dehydration properties of the press blanket need to be tested simultaneously to evaluate its performance. Therefore, a testing device is needed to simulate the state of the press blanket during use and conduct relevant performance tests in order to monitor the relevant performance of the press blanket in real time and obtain the service life of the press blanket so as to replace the press blanket in a timely manner during use. Utility Model Content

[0004] The main objective of this application is to provide a testing device that addresses the aforementioned technical problems existing in the prior art.

[0005] To address the aforementioned problems, this application provides a testing apparatus, which includes a testing machine. The testing machine includes a frame, a first extruder, and a second extruder. The second extruder is slidably connected to the frame, and the first extruder is connected to the frame and disposed opposite to the second extruder. The second extruder can move toward the first extruder to extrude a test specimen located between the first extruder and the second extruder. A water spray hole is provided on the side of the second extruder facing the first extruder, and the water spray hole is used to humidify the test specimen.

[0006] Furthermore, the testing device also includes a water supply component, and the testing machine also includes a control console. The control console is connected to the frame component. The water supply component includes a main body and a control unit. The main body is connected to the water spray hole, and the control unit is connected to the control console.

[0007] Furthermore, the testing device also includes a heating container connected to the water supply unit, the heating container being used to provide heated water to the water supply unit.

[0008] Furthermore, the first extrusion member is provided with a drainage hole, and a first water collection member is provided on the side of the first extrusion member opposite to the second extrusion member.

[0009] Furthermore, the size of the first water collecting element is larger than the size of the first extruder and the second extruder.

[0010] Furthermore, the testing device also includes a first measuring element, which is connected to the first water collection element.

[0011] Furthermore, the testing device also includes a second water collection component and a second metering component, the second metering component and the second water collection component are connected, and the second water collection component and the first water collection component are in communication.

[0012] Furthermore, the size of the second water collecting element is larger than the size of the first water collecting element.

[0013] Furthermore, the testing machine includes a first sensor and a second sensor, the first sensor being connected to the first extrusion member, and the second sensor being connected to the second extrusion member.

[0014] Furthermore, there are multiple water spray holes, which are evenly spaced on the side of the second extruder facing the first extruder.

[0015] Compared with the prior art, the testing device of this application includes a testing machine, which includes a frame, a first extruder, and a second extruder. The second extruder is slidably connected to the frame, and the first extruder is connected to the frame and disposed opposite to the second extruder. The second extruder can move towards the first extruder to extrude the test piece located between the first and second extruders. A water spray hole is provided on the side of the second extruder facing the first extruder for humidifying the test piece. Through the above implementation, the first and second extruders are relatively close to each other to extrude the test piece, and the first and second extruders are relatively far apart to release pressure on the testing machine, thereby conducting a compression test on the test piece and testing its compression recovery performance. The water spray hole sprays water onto the test piece before the first and second extruders extrude it to humidify it, thereby testing the dynamic compression recovery performance and dehydration performance of the test piece in a wet state. This makes the test more consistent with the actual use of the test piece and allows for better prediction of the test piece's service life. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an embodiment of the testing device provided in this application;

[0018] Figure 2 This is a bottom view of the second extruder of the testing apparatus provided in this application;

[0019] Figure 3 This is a top view of the first extrusion component of the testing apparatus provided in this application.

[0020] Reference numerals: Test device 1; Test machine 10; Frame component 110; First extrusion component 120; Drainage hole 121; Second extrusion component 130; Water spray hole 131; Control console 140; First sensor 150; Water supply component 20; Main body 210; Control unit 220; Heating container 30; First water collection component 40; First metering component 50; Second water collection component 60; Second metering component 70. Detailed Implementation

[0021] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0023] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0026] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0027] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0028] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0029] In the papermaking industry, press blankets play a crucial role. They are used to transport and support wet paper, absorb moisture from the paper, compress and expel the moisture, and then repeatedly absorb moisture to dry the paper. During repeated use, the compression resilience, absorbency, and dehydration properties of press blankets gradually deteriorate, necessitating periodic replacement.

[0030] The compression recovery and dehydration properties of the press blanket need to be tested simultaneously to evaluate its performance. Therefore, a testing device is needed to simulate the state of the press blanket during use and conduct relevant performance tests in order to monitor the relevant performance of the press blanket in real time and obtain the service life of the press blanket so as to replace the press blanket in a timely manner during use.

[0031] To address the related technical problems, this application provides a testing device, see [link to relevant documentation]. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of an embodiment of the testing device provided in this application. Figure 2 This is a bottom view of the second extruder of the test apparatus provided in this application.

[0032] The testing device 1 includes a testing machine 10, which includes a frame 110, a first extruder 120, and a second extruder 130. The second extruder 130 is slidably connected to the frame 110, and the first extruder 120 is connected to the frame 110 and is disposed opposite to the second extruder 130. The second extruder 130 can move toward the first extruder 120 to extrude the test piece located between the first extruder 120 and the second extruder 130. A water spray hole 131 is provided on the side of the second extruder 130 facing the first extruder 120, and the water spray hole 131 is used to humidify the test piece.

[0033] The frame member 110 has interconnected crossbeams and longitudinal beams. A first extruder 120 and a second extruder 130 are connected to the crossbeams, which are slidably connected to the longitudinal beams. The crossbeams move along the longitudinal beams, causing the first extruder 120 and the second extruder 130 to move up and down. The movement of the first extruder 120 and the second extruder 130 can be driven by a motor or a hydraulic device. The second extruder 130 is located above the first extruder 120. Both extruders can have circular, rectangular, or other shapes, which are not limited here. Preferably, the first extruder 120 and the second extruder 130 are circular. It should be noted that both the first extruder 120 and the second extruder 130 can also be slidably connected to the frame member 110, or only one of them can be slidably connected to the frame member 110. In one embodiment, the first extruder 120 is fixedly connected to the frame member 110, the second extruder 130 is slidably connected to the frame member 110, the test specimen is supported on the first extruder 120, and the second extruder 130 moves toward the first extruder 120 to extrude the test specimen.

[0034] Through the above implementation method, the first extruder 120 and the second extruder 130 are relatively close to each other to compress the test piece, and the first extruder 120 and the second extruder 130 are relatively far apart to release pressure on the testing machine, thereby conducting a compression test on the test piece and testing its compression recovery performance (the ratio of the thickness of the test piece during compression to the thickness of the test piece after compression recovery); the water spray hole 131 sprays water to humidify the test piece before the first extruder 120 and the second extruder 130 compress it, thereby testing the dynamic compression recovery performance and dehydration performance of the test piece in a wet state (the ratio of the amount of water removed from the test piece after compression to the amount of water content in the test piece before compression), making the test more consistent with the actual use of the test piece and better predicting the service life of the test piece. In this application, the test piece is selected as a press blanket.

[0035] The testing device 1 also includes a water supply component 20, and the testing machine 10 also includes a control console 140. The control console 140 is connected to the frame component 110. The water supply component 20 includes a main body 210 and a control unit 220. The main body 210 is connected to the water spray hole 131, and the control unit 220 is connected to the control console 140.

[0036] The testing machine 10 can be a tensile testing machine. The control console 140 is used to control the movement of the first extrusion member 120 and the second extrusion member 130, as well as the pressure exerted on the test piece, and to collect and display parameters such as the compressibility deformation and pressure of the test piece. The water supply unit 20 supplies water to the spray nozzle 131 through the main body 210. The control unit 220 is used to control the water supply speed and the on / off state of the water supply from the water supply unit 20, that is, to control the on / off state, spray speed, and spray flow rate of the spray nozzle 131. Both the control unit 220 and the control console 140 can be equipped with embedded or microprocessors such as single-chip microcomputers for intelligent control. The control unit 220 and the control console 140 can be wirelessly connected, allowing the control console 140 to control parameters such as the spray time and spray speed of the spray nozzle 131.

[0037] In some implementations, the control unit 220 and the console 140 may not be connected. The control unit 220 and the console 140 can each wirelessly communicate with a computer, allowing the computer to control parameters such as the water supply speed and duration of the water supply component 20, and to collect and statistically analyze data from the testing machine 10. The water supply component 20 can be an intelligent water pump. Both the testing machine 10 and the water supply component 20 can be interconnected with the computer via wireless communication or a hardware interface.

[0038] The testing device 1 also includes a heating container 30, which is connected to the water supply unit 20. The heating container 30 is used to provide heated water to the water supply unit 20. The heating container 30 is used to store water and heat the water to a suitable temperature, so that when water is sprayed onto the test piece through the spray hole 131 to humidify it, the state of the test piece is closer to that under actual use, thus improving the accuracy of the test results. The heating container 30 can be a smart water heater.

[0039] See Figure 3 , Figure 3 This is a top view of the first extrusion member 120 of the test apparatus 1 provided in this application.

[0040] The first extruder 120 is provided with drainage holes 121, and a first water collection element 40 is provided on the side of the first extruder 120 opposite to the second extruder 130. Multiple drainage holes 121 are provided, extending through both the upper and lower surfaces of the first extruder 120. These drainage holes 121 on the second extruder 130 guide the water discharged during compression of the test specimen to the first water collection element 40. The first water collection element 40 collects the water flowing from the drainage holes 121. By measuring the weight or volume of water within the first water collection element 40, the amount of water removed from the test specimen during compression testing can be obtained, thereby analyzing the dehydration performance of the test specimen. It should be noted that the size of the drainage holes 121 should not be too large to avoid the test specimen from being recessed into the drainage holes 121 when compressed by the first extruder 120 and the second extruder 130, thus affecting the test results.

[0041] The size of the first water collecting component 40 is larger than the size of the first extruder 120 and the second extruder 130, so that the projections of the first extruder 120 and the second extruder 130 on the first water collecting component 40 are located within the internal space of the first water collecting component 40. This ensures that all the water discharged from the test piece during the compression test flows into the first water collecting component 40, preventing water from overflowing onto the testing machine 10. The opening side of the first water collecting component 40 faces the first extruder 120 and the second extruder 130. Preferably, the first extruder 120 and the second extruder 130 have the same size and are both smaller than the size of the first water collecting component 40.

[0042] The testing device 1 also includes a first measuring element 50, which is connected to the first water collecting element 40. The first measuring element 50 is used to monitor and measure the moisture collected in the first water collecting element 40. The first measuring element 50 can use a pressure sensor or an ultrasonic flow meter to measure the weight or volume of the moisture in the first water collecting element 40, thereby further analyzing and calculating the dehydration performance of the test specimen. The first measuring element 50 can be directly connected to the control console 140 of the testing machine 10, or it can be connected to a computer to transmit data.

[0043] In some embodiments, the testing device 1 further includes a second water collection element 60 and a second measuring element 70, which are connected to the second water collection element 60 and communicate with the first water collection element 40. Preferably, after a compression test, the first measuring element 50 measures the water collected in the first water collection element 40 and then discharges the water in the first water collection element 40 to the second water collection element 60. The second water collection element 60 can be connected to the first water collection element 40 through a pipe. On the one hand, the second water collection element 60 can collect the water in the first water collection element 40; on the other hand, the second measuring element 70 is connected to the second water collection element 60 to perform a secondary measurement on the water collected in the second water collection element 60. By comparing the test results of the first measuring element 50 and the second measuring element 70, the measurement accuracy is improved, avoiding large errors caused by instrument malfunctions or damage during a single measurement using either the first measuring element 50 or the second measuring element 70. If the error between the test results of the first measuring element 50 and the second measuring element 70 is within a certain range, the test result can be considered normal. The second measuring element 70 can use a smart electronic balance, pressure sensor or ultrasonic flow meter to measure the weight or volume of water, and then analyze and calculate the dehydration performance of the test piece. The second measuring element 70 can be connected to the control console 140 of the testing machine 10, and the second measuring element 70 can also be connected to a computer to transmit data.

[0044] The second water collection unit 60 is larger than the first water collection unit 40, and its internal capacity is also larger. The second water collection unit 60 can collect and hold the water inside the first water collection unit 40 and periodically drain it. Because the first water collection unit 40 is connected to the first extrusion member 120, its internal capacity is limited to avoid affecting the test due to its large size. Therefore, the first water collection unit 40 needs to promptly drain its internal water into the second water collection unit 60. The second water collection unit 60 can be separated from the testing machine 10; therefore, its size can be larger to collect and hold the water inside the first water collection unit 40 and periodically drain it.

[0045] The testing machine 10 includes a first sensor 150 and a second sensor. The first sensor 150 is connected to the first extrusion member 120, and the second sensor is connected to the second extrusion member 130. The first sensor 150 is used to monitor and collect parameters such as the pressure experienced by the test piece during compression testing, the deformation of the test piece after extrusion, and the recovery amount of the test piece after extrusion. The first sensor 150 is connected to the control console 140, and the data collected by the first sensor 150 is fed back to the control console 140. The second sensor is used to monitor the distance between the first extrusion member 120 and the second extrusion member 130, and to feed back the relevant data to the control console 140. This allows the water supply unit 20 and the water spray hole 131 to spray water onto the test piece to humidify it when the second extrusion member 130 and the first extrusion member 120 are close to each other at a certain distance, so as to better simulate the dynamic compression performance of the test piece under wet conditions.

[0046] The number of water spray holes 131 is multiple, and the multiple water spray holes 131 are evenly spaced on the side of the second extruder 130 facing the first extruder 120. By setting multiple water spray holes 131, the humidification of the test piece located between the first extruder 120 and the second extruder 130 is more uniform, and the test results of its compression performance in wet state are avoided due to uneven humidification of the test piece.

[0047] In summary, the testing device 1 of this application uses the first extrusion member 120 and the second extrusion member 130 of the testing machine 10 to perform compression testing on the test specimen. A water spray hole 131 is provided on the second extrusion member 130 to spray water and humidify the test specimen, realizing the compression test of the test specimen in a wet state. The water supply member 20 is used to adjust and control parameters such as the spray speed and spray volume of the water spray hole 131. The heating container 30 is used to provide a heated water source. At the same time, a drain hole 121 is provided on the first extrusion member 120. A first water collection member 40, a second water collection member 60, a first metering member 50 and a second metering member 70 are set to guide, collect and measure the amount of water removed from the test specimen during the compression test, thereby analyzing its dehydration performance. The testing machine 10, the first metering member 50, the second metering member 60 and so on can be interconnected with a computer to transmit relevant performance parameters to the computer for real-time monitoring. The computer analyzes and displays parameters such as the initial water content of the test specimen, the amount of water removed after compression, the extrusion pressure on the test specimen and the real-time function graph of the resulting compression deformation. The testing device 1 of this application can test the dynamic compression recovery performance and dehydration performance of the test specimen under wet conditions, making the test of the test specimen more consistent with the actual use of the test specimen and better predicting the service life of the test specimen.

[0048] The testing process of the test piece by the testing device 1 is roughly as follows: the heating container 30 heats the water source to the target temperature and maintains a constant temperature; the test piece is placed on the first extrusion piece 120; relevant test parameters, such as the size and thickness of the test piece, compression rate, compression force, and compression residence time, are input into the control console 140 of the testing machine 10; the second extrusion piece 130 is controlled to be relatively close to the first extrusion piece 120; when the second extrusion piece 130 and the first extrusion piece 120 are a certain distance apart, the water supply component 20 is controlled, thereby controlling the water nozzle to spray water onto the test piece at a certain spray rate for a certain period of time to humidify it (the test piece needs to reach the target humidity, and the amount of water sprayed to reach the target humidity can be calculated based on the size and thickness of the test piece); the testing machine 10, through the control console 140, sprays water onto the test piece according to the set compression rate and compression force, etc. The first extrusion component 120 and the second extrusion component 130 are numerically controlled to perform compression tests on the test specimen and acquire the compression deformation of the test specimen. The first metering component 50 and the second metering component 70 measure the weight or volume of water collected by the first water collecting component 40 and the second water collecting component 60. After compression continues for a certain period of time, the second extrusion component 130 and the first extrusion component 120 are controlled to separate relative to release the pressure on the test specimen. After maintaining this for a certain period of time, the deformation parameters of the test specimen after compression recovery are monitored to complete one compression cycle test. Then, the test specimen is subjected to humidification compression tests and relevant data is collected. The compression cycle test is continuously performed until the predetermined number of cycles is completed. While the test specimen is being tested, the collected data is simultaneously transmitted to the computer for real-time calculation and analysis of the dynamic compression recovery performance and dehydration performance of the test specimen in a wet state.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A test device, characterized by The test device comprises a testing machine, the testing machine comprises a frame member, a first extrusion member and a second extrusion member, the second extrusion member is slidingly connected to the frame member, the first extrusion member is connected to the frame member and is arranged opposite to the second extrusion member, the second extrusion member can move towards the first extrusion member to extrude a test piece between the first extrusion member and the second extrusion member, a water spraying hole is arranged on a side of the second extrusion member facing the first extrusion member, and the water spraying hole is used for humidifying the test piece.

2. The test device of claim 1, wherein, The test device further comprises a water source supply member, the testing machine further comprises a control console, the control console is connected to the frame member, the water source supply member comprises a main body part and a control part, the main body part is connected to the water spraying hole, and the control part is connected to the control console.

3. The test device of claim 2, wherein, The test device further comprises a heating accommodating member, the heating accommodating member is connected to the water source supply member, and the heating accommodating member is used for providing a heated water source for the water source supply member.

4. The test device of claim 1, wherein, The first extrusion member is provided with a drainage hole, and a first water collecting member is arranged on a side of the first extrusion member away from the second extrusion member.

5. The test device of claim 4, wherein, The size of the first water collecting member is greater than the size of the first extrusion member and the second extrusion member.

6. The test device of claim 4, wherein, The test device further comprises a first metering member, and the first metering member is connected to the first water collecting member.

7. The test device of claim 4, wherein, The test device further comprises a second water collecting member and a second metering member, the second metering member is connected to the second water collecting member, and the second water collecting member is connected to the first water collecting member.

8. The test device of claim 7, wherein, The size of the second water collecting member is greater than the size of the first water collecting member.

9. The test device of claim 1, wherein, The testing machine comprises a first sensor and a second sensor, the first sensor is connected to the first extrusion member, and the second sensor is connected to the second extrusion member.

10. The test device of claim 1, wherein, The number of the water spraying holes is multiple, and the multiple water spraying holes are uniformly arranged on a side of the second extrusion member facing the first extrusion member.

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