Experimental device for measuring mechanical properties of oilseed pressing

Abstract

An experimental device for measuring the mechanical properties of oil pressing comprises a support, on which a cavity with a lateral opening is provided; a gasket group detachably arranged in the cavity, in which a sample space is provided for accommodating the oil sample; a piston rod vertically slidably connected to the support and capable of extending into the sample space; and a driving device for driving the piston rod to move up and down to apply pressure to the oil sample. The experimental device for measuring the mechanical properties of oil pressing according to the present invention facilitates the standardized operation of loading and unloading oil samples; can be used for oil pressing mechanical properties measuring experiments of oil samples of different thicknesses or different particle sizes; the number of second gaskets with guide grooves and the width and number of guide grooves on each second gasket are adjusted to simulate different oil outlet gaps and oil outlet areas; and the temperature of the oil sample can be accurately and stably controlled.

Description

Technical Field

[0001] The invention belongs to the technical field of oil processing, and more specifically, relates to an experimental device for determining the mechanical properties of oil pressing. Background Art

[0002] The use of pressing to produce oil from oil is one of the most mature and widely used oil production technologies. Due to its high operational safety, low loss of nutrients, no risk of chemical pollution, and energy-saving and environmentally friendly processing, it has great advantages in the processing of high-value oil. The mechanical properties of oil pressing refer to the various mechanical properties exhibited by oil particles in a semi-closed environment that simulates the oil pressing process due to the mechanical interaction between oil particles and the wall and other oil particles, including hardness, brittleness, plasticity and elasticity. In order to establish appropriate chamber pressure, accelerate oil extrusion, reduce powder generation, reduce operating energy consumption, optimize the structure of oil pressing equipment, and ultimately obtain a higher oil pressing efficiency, it is necessary to measure and regulate the mechanical properties of oil pressing. In addition, the mechanical properties of oil are also of great guiding significance in the optimization of oil press structure and operation mode.

[0003] So far, there have been qualitative discussions on the hardness, plasticity and other properties of oil and their influence on the efficiency of oil pressing, but there are few quantitative measured data and the reliability is insufficient, resulting in the lack of reliable data basis for the precise design of oil pressing equipment and the process optimization of oil pressing, and often can only rely on experience for design or operation practice, which limits the improvement of the technical level in this field. For example, Cheng Yuanyuan et al. used a material tester to use single grain oil, including rapeseed, peanut kernel, flax seed, perilla seed, etc. as samples, and used the texture profile analysis (TPA) mode to determine the various pressing mechanical properties of oil. However, this determination method cannot characterize the interaction between multiple particles and multiple layers of oil, and cannot fully reflect the pressing mechanical properties of oil aggregates. Li Shilong et al. disclosed an oil pressing performance detection device with an annular piston mechanism, which can measure the oil outlet pressure and stress-strain of oil. However, the device does not consider the adaptation to the press chamber environment such as oil outlet gap, temperature and press material characteristics, such as particle size, thickness, number of layers, etc., and has not yet considered the quantitative characterization of various mechanical properties of oil. Therefore, the development of quantitative characterization devices and methods for the mechanical properties of oil pressing is of great significance for improving the theory of oil pressing, improving the equipment level, optimizing the process operation and thus breaking through the limitations of oil pressing technology.

[0004] During the oil pressing mechanical test, some fluids such as air, oil or water, as well as solids such as powder or colloid, will be squeezed out of the gap in the test space, so their characteristics are different from the meaning and measurement of general material mechanical properties. The existing related measurement devices or methods have the following limitations in reflecting the diversity of pressing environment characteristics: lack of adjustment methods for the oil outlet gap in a semi-closed measurement environment; lack of adjustment methods for multiple oil scales and multiple sample thicknesses or layers; lack of measures to implement temperature control for the oil samples to be tested; lack of operational standardization and convenience measures in loading and unloading oil samples.

[0005] Therefore, it is necessary to develop an experimental device that can be applied to the pressing mechanical properties of oil samples with multiple particles, multiple thicknesses, and multiple particle sizes. In addition, it is also expected that the pressing experimental device can achieve constant temperature heating, facilitate the adjustment of the oil outlet gap to meet the needs of the pressing environment, and facilitate the standardized loading and unloading of samples. Summary of the invention

[0006] The purpose of the present invention is to provide an experimental device for determining the mechanical properties of oil pressing, which can be applicable to the requirements of various oil particle sizes, various oil sample thicknesses or layer numbers.

[0007] In order to achieve the above object, the present invention provides an experimental device for measuring the mechanical properties of oil pressing, comprising:

[0008] A support, wherein the support is provided with a cavity with a lateral opening;

[0009] A gasket group is detachably arranged in the cavity, and a sample space is provided in the gasket group for accommodating an oil sample;

[0010] A piston rod, vertically slidably connected to the support and capable of extending into the sample space;

[0011] The driving device is used to drive the piston rod to move up and down to apply pressure to the oil sample.

[0012] Preferably, the gasket set comprises a first gasket, a plurality of second gaskets and a third gasket stacked in sequence from bottom to top, the third gasket and each of the second gaskets are provided with a sample hole, and the plurality of sample holes are combined to form the sample space.

[0013] Preferably, each of the second gaskets is provided with at least one oil collecting hole, and a portion of the second gaskets among the plurality of second gaskets are provided with a guide groove, and the guide groove connects the sample space with the oil collecting hole.

[0014] Preferably, the thickness of the first gasket, each of the second gaskets and the third gasket is 0.5-1mm, the diameter of the sample hole is not less than 6mm, the width of the guide groove on each of the second gaskets is 0.5-2mm, the length is 3-20mm and the number is 0-4, the number of the oil collecting holes on each of the second gaskets is the same as the number of the guide grooves, and the diameter of the oil collecting hole is not less than 1 / 2 of the diameter of the sample hole.

[0015] Preferably, it also includes a temperature control device, which includes a temperature control switch and multiple heating plates and temperature sensors arranged in the gasket group. The heating plates are used to heat the oil sample, and the temperature control switch controls the start and stop of the heating plates according to the signal of the temperature sensor.

[0016] Preferably, each of the second gaskets is provided with at least one constant temperature hole, and each of the constant temperature holes on multiple second gaskets is combined to form a constant temperature bath, in which a heat transfer medium is provided, each of the electric heating plates is arranged in one of the constant temperature baths, and the temperature sensor is arranged in any of the constant temperature baths.

[0017] Preferably, each of the thermostatic holes is arc-shaped and the total arc of at least one of the thermostatic holes is not less than 180°, and the total area of ​​at least one of the thermostatic holes is not less than 1 / 3 of the total area of ​​the second gasket.

[0018] Preferably, the support is C-shaped, comprising an upper arm, a column and a base connected in sequence to form the cavity with a lateral opening, the first gasket is fitted with the base, and one side of the gasket group is fitted with the column;

[0019] The upper arm is provided with a through hole and a plurality of positioning holes, the piston rod is vertically slidably connected to the through hole and the sample space in sequence, and each positioning hole is pressed against the gasket set through a connecting piece.

[0020] Preferably, the diameter of the through hole is not less than the diameter of the sample hole, and the thickness of the upper arm is not less than the diameter of the through hole.

[0021] Preferably, the driving device is a material tester, comprising a motor and a pressing head, wherein the motor drives the pressing head to slide up and down and pushes the piston rod downward.

[0022] The invention relates to an oil pressing mechanical property determination experimental device, which has the following beneficial effects: a gasket group is horizontally loaded into a cavity with a lateral opening on a support, so as to facilitate the standardized operation of loading and unloading oil samples; by flexibly selecting gasket groups with different thicknesses, it can be used for oil pressing mechanical property determination experiments of oil samples with different thicknesses or different particle sizes, and has universality; by adjusting the number of second gaskets with guide grooves and the width and number of guide grooves on each second gasket, different oil outlet gaps and oil outlet areas can be simulated; the temperature of the oil sample can be accurately and stably controlled; the positions of the gasket group and the piston rod are accurately defined by the positioning holes and through holes on the support, so as to facilitate precise assembly.

[0023] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0025] Figure 1 A schematic diagram showing the structure of an experimental device for measuring mechanical properties of oil pressing according to an exemplary embodiment of the present invention;

[0026] Figure 2 A schematic diagram showing the structure of a second gasket in an oil pressing mechanical property determination experimental device according to an exemplary embodiment of the present invention;

[0027] Description of reference numerals:

[0028] 1 support, 2 gasket group, 3 piston rod, 4 first gasket, 5 second gasket, 6 third gasket, 7 sample hole, 8 electric heating plate, 9 temperature sensor, 10 temperature control switch, 11 constant temperature hole, 12 constant temperature bath, 13 upper arm, 14 base, 15 column, 16 through hole, 17 positioning hole, 18 fixing hole, 19 oil collecting hole, 20 guide groove, 21 oil sample. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0030] In order to solve the problems existing in the prior art, the present invention provides an experimental device for measuring the mechanical properties of oil pressing, comprising:

[0031] A support, wherein the support is provided with a cavity with a lateral opening;

[0032] A gasket group is detachably arranged in the cavity, and a sample space is provided in the gasket group for accommodating the oil sample;

[0033] A piston rod is vertically slidably connected to the support and can extend into the sample space;

[0034] The driving device is used to drive the piston rod to move up and down to apply pressure to the oil sample.

[0035] The oil pressing mechanical properties determination experimental device provided by the present invention has a gasket group horizontally loaded into a cavity of a lateral opening of a support, so as to facilitate the standardized operation of loading and unloading oil samples; it can be used for oil pressing mechanical properties determination experiments for oil samples of different thicknesses or different particle sizes and pressing environment requirements by flexibly selecting gasket groups of different thicknesses or specifications, or by adjusting the number of gaskets in the gasket group, and has wide versatility for various oil types, process types and equipment structures.

[0036] Preferably, the gasket set includes a first gasket, a plurality of second gaskets and a third gasket stacked in sequence from bottom to top, the third gasket and each second gasket are provided with a sample hole, the plurality of sample holes are combined to form a sample space, and the height of the oil sample loaded in the sample space is flush with the third gasket. The first gasket is used to support the oil sample in the sample space.

[0037] Preferably, the material of the first gasket, the second gasket and the third gasket is a plate material that is easy to process precisely and has high hardness and good thermal conductivity within a temperature range of 20-150°C.

[0038] The mechanical properties of oil pressing and the oil pressing effect are related to the thickness of the material layer. By changing the number of second gaskets or the thickness of each second gasket to adjust the thickness of the gasket group, the depth of the sample space can be adjusted, that is, the device can be suitable for the pressing mechanical properties experiment of oil samples of various thicknesses, and has wide versatility; the oil sample is placed in the sample space, and the piston rod applies pressure to it to cause the oil sample to deform, simulating the actual oil pressing process, and then the mechanical properties of the oil sample can be calculated based on the corresponding relationship between deformation and stress and the historical curve of the pressure process.

[0039] Preferably, each second gasket is provided with at least one oil collecting hole, and a portion of the plurality of second gaskets are provided with guide grooves, which connect the sample space with the oil collecting hole.

[0040] Preferably, the thickness of the first gasket, each second gasket and the third gasket is 0.5-1mm, the diameter of the sample hole is not less than 6mm, the width of the guide groove on each second gasket is 0.5-2mm, the length is 3-20mm and the number is 0-4, the number of oil collecting holes on each second gasket is the same as the number of guide grooves, and the diameter of the oil collecting hole on each second gasket is not less than 1 / 2 of the diameter of the sample hole.

[0041] During the squeezing process of oil samples, the squeezed oil flows out through the gap on the surface of the pressurized space. When the oil outlet gap is large, the oil outlet area is large and the oil flow is smoother. If the oil outlet gap is too large, the oil sample particles or debris will be squeezed out, resulting in a high impurity content in the squeezed oil and a decrease in the chamber pressure. Therefore, the oil outlet gap has a great influence on the effect of squeezing oil, and needs to be flexibly selected according to factors such as the particle size of the oil sample and the squeezing stage. The guide groove connects the sample space with the oil collecting hole, becoming the channel for the squeezing outlet of the oil sample, that is, the oil outlet gap. The area of ​​the guide groove is the oil outlet area. The width and number of the guide grooves and the thickness and stacking method of the second gasket can be flexibly selected to meet the squeezing environment required by different oil samples. It can not only measure the mechanical properties of the oil sample under different squeezing environments, but also provide a reference for the adjustment of the chamber structure parameters of the oil press.

[0042] Preferably, oil-absorbing fibers are provided in the oil collecting hole for absorbing the pressed oil entering the oil collecting hole through the guide groove, so as to obtain the weight of the pressed oil, and then analyze the oil extraction efficiency under specific pressing conditions.

[0043] Preferably, the experimental device for determining the mechanical properties of oil pressing also includes a temperature control device, which includes a temperature control switch and multiple electric heating plates and temperature sensors arranged in the gasket group. The electric heating plates are used to heat the oil samples, and the temperature control switch controls the start and stop of the electric heating plates according to the signal of the temperature sensor.

[0044] The oil sample is heated by the electric heater, and the temperature control switch controls the start and stop of the electric heater according to the temperature signal of the temperature sensor, so that the oil sample is stabilized at the preset temperature during pressing, thereby reflecting the mechanical properties under different pressing temperatures.

[0045] Preferably, each second gasket is provided with at least one constant temperature hole, and each constant temperature hole on multiple second gaskets is combined to form a constant temperature tank, in which a heat transfer medium is provided, each electric heater is arranged in a constant temperature tank, and a temperature sensor is arranged in any constant temperature tank.

[0046] Preferably, each thermostatic hole is arc-shaped and the total arc of at least one thermostatic hole is not less than 180°, and the total area of ​​at least one thermostatic hole is not less than 1 / 3 of the total area of ​​the second gasket.

[0047] Preferably, the multiple thermostatic holes on each second gasket are evenly distributed along the circumference of the sample hole, and the arc center of each thermostatic hole is arranged concentrically with the sample hole, thereby mostly surrounding the sample space and stably supplying heat, so that the oil sample maintains accurate and uniform temperature during the experiment.

[0048] Preferably, the heat transfer medium is a high specific heat capacity liquid, such as water, glycerin, silicone oil or vegetable oil, preferably a liquid with high viscosity; the first gasket, the second gasket and the third gasket are made of metal, and the specific heat capacity of the heat transfer medium is higher than the specific heat capacity of the material used for the first gasket, the second gasket and the third gasket, which is conducive to heat transfer, keeps the temperature constant and stable, and is conducive to the accuracy of the experimental results.

[0049] Preferably, the first gasket, each second gasket and the third gasket are provided with a plurality of fixing holes, each fixing hole on the first gasket, each second gasket and the third gasket is locked by a screw, and the number of the fixing holes is 2-4.

[0050] The first gasket, the second gasket and the third gasket are combined to form a gasket group and pressed and placed on the support. The first gasket, the second gasket and the third gasket all have smooth surfaces. The gasket group is sealed by pressing, and the heat transfer medium is heated by the electric heating plate to heat the oil sample, avoiding the situation of poor heat transfer and inconsistent temperature distribution caused by direct heating, and also avoiding the complexity of the device caused by the installation of a separate heating device. The heat transfer medium can provide stable and uniform heating or heat absorption conditions for the sample space. The temperature sensor is arranged in the constant temperature bath in contact with the heat transfer medium, which can control the sample temperature more stably and evenly.

[0051] Preferably, the support is C-shaped, comprising an upper arm, a column and a base connected in sequence, the upper arm, the column and the base forming a cavity with a lateral opening, the gasket group is arranged in the cavity, the first gasket is in contact with the base, and one side of the gasket group is in contact with the column;

[0052] The upper arm is provided with a through hole and a plurality of positioning holes, the piston rod is vertically slidably connected to the through hole and the sample space in sequence, and each positioning hole is pressed against a gasket group through a connecting piece.

[0053] Preferably, the total height of the gasket group is smaller than the distance between the upper arm and the base, and the gasket group can be loaded into or removed from the lateral opening of the support cavity, so as to facilitate loading and unloading of oil samples from the sample space of the gasket group and facilitate standardized operation, that is, using the same support to carry out measurement experiments on different combinations of gasket groups or different oil samples.

[0054] Preferably, a lubricant is provided between the piston rod and the through hole.

[0055] Preferably, the connecting member is a bolt. The connecting member can define the position of the gasket set and achieve precise alignment between the piston rod and the sample hole by pressing the gasket set.

[0056] Preferably, the positioning hole is a threaded hole.

[0057] The positioning holes and through holes on the C-shaped support can accurately define the relative positions of the gasket group and the piston rod, which is convenient for the precise assembly of the various components; the gasket group is connected to the upper arm by bolts and the gasket group is compressed to facilitate disassembly; when the oil sample needs to be loaded and unloaded, the gasket group can be separated from the support and the gasket group can be pulled out to facilitate assembly, loading or unloading, thereby avoiding the situation in which the oil sample is compressed and aggregated or adhered to the bottom of the sample space, which makes it difficult to clean thoroughly and affects subsequent measurements, and can realize standardized operations for loading and unloading of oil samples.

[0058] Preferably, the diameter of the through hole is not less than the diameter of the sample hole, and the thickness of the upper arm is not less than the diameter of the through hole, so that the piston rod can move vertically when moving up and down, reducing the deflection caused by the gap between the piston rod and the through hole.

[0059] Preferably, the diameter of the sample hole is not less than 4 times the length of the oil sample.

[0060] Preferably, the diameter of the through hole is not less than 6 mm, and the height of the column is not less than 30 mm.

[0061] Preferably, the piston rod includes a large diameter end and a small diameter end, and the diameter of the large diameter end is not smaller than the diameter of the small diameter end, the large diameter end is slidably connected to the through hole, the small diameter end is slidably connected to the sample hole, and the two end faces of the piston rod are horizontal end faces.

[0062] The diameter of the piston rod can be flexibly selected to suit different pressing requirements; for the same gasket set, the smaller the diameter of the small-diameter end of the piston rod, the greater the pressure, thereby being able to obtain a wider pressure range.

[0063] Preferably, the driving device is a material tester, including a motor and a pressing head, and the motor drives the pressing head to slide up and down and push the piston rod downward.

[0064] The material tester is an existing product, which is used to drive the piston rod. The parameters such as the trigger force, compression speed, compression stroke and maximum compression ratio of the material tester are adjustable. The material tester can display and record the strain under any stress state; it also includes a carrier for placing an experimental device for determining the mechanical properties of oil pressing; the material tester is used to apply pressure, and the TPA curve of the oil sample to be tested is recorded using the publicly available two-pressing-relaxation operation procedure (TPA mode), and the mechanical properties of the oil sample such as hardness, brittleness, elasticity and plasticity are calculated. This technical means is a conventional technical means in this field and will not be repeated here.

[0065] The steps of performing a pressing experiment with the oil pressing mechanical properties determination experimental device provided by the present invention are as follows:

[0066] Step 1, assembling the gasket set: selecting a second gasket with a preset width of the guide groove, thickness, quantity and sample hole diameter, combining it with the first gasket and the third gasket with the sample hole of the same diameter to form a gasket set and tightening it with screws, and filling the oil collecting hole with oil absorbing fibers;

[0067] Step 2, loading the sample: filling the sample hole in the gasket set with the oil sample to be tested until it is flush with the third gasket;

[0068] Step 3, device assembly: push the gasket set into the cavity of the support until one side thereof fits with the column, and pass the connector through the upper arm to press the gasket set; pass the piston rod through the through hole and align it with the sample hole, and inject the heat transfer medium into the constant temperature bath;

[0069] Step 4, test: place the above-assembled device on the carrier of the material tester, start the temperature control device to stabilize the temperature at the preset value; set the trigger force, compression speed, compression stroke and compression ratio of the material tester, use the TPA mode to record the TPA curve of the oil sample to be tested, and then calculate the mechanical properties parameters of the oil sample such as hardness, brittleness, elasticity and recovery.

[0070] Example 1

[0071] like Figures 1 to 2 As shown, the present invention provides an experimental device for measuring the mechanical properties of oil pressing, comprising:

[0072] A support 1, wherein the support 1 is provided with a cavity with a lateral opening;

[0073] A gasket set 2 is detachably disposed in the cavity, and a sample space is provided in the gasket set 2 for accommodating an oil sample 21;

[0074] The piston rod 3 is vertically slidably connected to the support 1 and can extend into the sample space;

[0075] The driving device is used to drive the piston rod 3 to move up and down to apply pressure to the oil sample 21.

[0076] In this embodiment, the gasket set 2 includes a first gasket 4, a plurality of second gaskets 5 and a third gasket 6 stacked in sequence from bottom to top, the third gasket 6 and each second gasket 5 are provided with a sample hole 7, the plurality of sample holes 7 are combined to form a sample space, and the height of the oil sample 21 loaded in the sample space is flush with the third gasket 6. The first gasket 4 is used to support the oil sample 21 in the sample space.

[0077] In this embodiment, each second gasket 5 is provided with at least one oil collecting hole 19 , and a portion of the second gaskets 5 among the plurality of second gaskets 5 are provided with guide grooves 20 , which connect the sample space with the oil collecting hole 19 .

[0078] In this embodiment, the second gaskets 5 with the guide grooves 20 and the second gaskets 5 without the guide grooves 20 are alternately stacked.

[0079] In this embodiment, the number of the oil collecting holes 19 on each second gasket 5 is two.

[0080] In this embodiment, the width of the guide groove 20 is 1 mm, the length is 3-20 mm, and the number of the guide grooves 20 is 2. The diameter of the oil collecting hole 19 is not less than 1 / 2 of the diameter of the sample hole 7 .

[0081] In this embodiment, oil-absorbing fibers are provided in the oil collecting hole 19 for absorbing the pressed oil entering the oil collecting hole 19 through the guide groove 20 .

[0082] In this embodiment, the diameter of the sample hole 7 is 8 mm, and the thickness of the first gasket 4, each of the second gaskets 5 and the third gasket 6 is 1 mm.

[0083] In this embodiment, the number of the second gaskets 5 is 19, and the depth of the sample hole 7 assembled into the gasket set 2 is 20 mm.

[0084] In this embodiment, the material of the first gasket 4, the second gasket 5 and the third gasket 6 is a plate material that is easy to process precisely and has high hardness and good thermal conductivity within a temperature range of 20-150°C.

[0085] In this embodiment, the experimental device for determining the mechanical properties of oil pressing also includes a temperature control device, which includes a temperature control switch 10 and multiple electric heating plates 8 and a temperature sensor 9 arranged in the gasket group 2. The electric heating plates 8 are used to heat the oil sample 21. The temperature control switch 10 controls the start and stop of the electric heating plates 8 according to the signal of the temperature sensor 9.

[0086] In this embodiment, each second gasket 5 is provided with two constant temperature holes 11, and each constant temperature holes 11 on multiple second gaskets 5 are combined to form a constant temperature tank 12, that is, the gasket group 2 has two constant temperature tanks 12; a heat transfer medium is provided in the constant temperature tank 12, each electric heating plate 8 is arranged in a constant temperature tank 12, and the temperature sensor 9 is arranged in any constant temperature tank 12.

[0087] In this embodiment, the heat transfer medium is glycerol.

[0088] In this embodiment, each thermostatic hole 11 is arc-shaped and the total arc of the two thermostatic holes 11 is not less than 180°. The total area of ​​the two thermostatic holes 11 is not less than 1 / 3 of the total area of ​​the second gasket 5 .

[0089] In this embodiment, the two thermostatic holes 11 on each second gasket 5 are evenly distributed along the circumference of the sample hole 7 , and the arc center of each thermostatic hole 11 is arranged concentrically with the sample hole 7 .

[0090] In this embodiment, four fixing holes 18 are provided on the first gasket 4 , each second gasket 5 and the third gasket 6 , and each fixing hole 18 on the first gasket 4 , each second gasket 5 and the third gasket 6 is locked by a screw.

[0091] The first gasket 4, the second gasket 5 and the third gasket group 2 are combined to form the gasket group 2 and are pressed and placed on the support 1. The first gasket 4, the second gasket 5 and the third gasket 6 all have smooth surfaces. The gasket group 2 is sealed by pressing, and the electric heater 8 is used to heat the heat transfer medium to provide heat to the oil sample 21.

[0092] In this embodiment, the support 1 is C-shaped, including an upper arm 13, a column 15 and a base 14 connected in sequence, and forming a cavity with a lateral opening, the gasket group 2 is arranged in the cavity, and the first gasket 4 is in contact with the base 14, and one side of the gasket group 2 is in contact with the column 15;

[0093] The upper arm 13 is provided with a through hole 16 and a plurality of positioning holes 17 , and the piston rod 3 is vertically slidably connected to the through hole 16 and the sample space in sequence, and each positioning hole 17 is pressed against the gasket set 2 by a bolt.

[0094] In this embodiment, lubricant is provided between the piston rod 3 and the through hole 16 .

[0095] In this embodiment, the positioning hole 17 is a threaded hole.

[0096] In this embodiment, the diameter of the through hole 16 is greater than the diameter of the sample hole 7 , and the thickness of the upper arm 13 is not less than the diameter of the through hole 16 .

[0097] In this embodiment, the diameter of the sample hole 7 is not less than 4 times the length of the oil sample 21 .

[0098] In this embodiment, the maximum length of the particles of the oil sample 21 used in any direction does not exceed 2 mm.

[0099] In this embodiment, the diameter of the through hole 16 is 14 mm, and the height of the column 15 is not less than 30 mm.

[0100] In this embodiment, the piston rod 3 includes a large diameter end and a small diameter end, and the diameter of the large diameter end is not less than the diameter of the small diameter end, the large diameter end is slidably connected to the through hole 16, the small diameter end is slidably connected to the sample hole 7, and the two end faces of the piston rod are horizontal end faces.

[0101] In this embodiment, the driving device is a material tester, which includes a motor and a pressing head. The motor drives the pressing head to slide up and down and pushes the piston rod 3 downward.

[0102] The steps of performing a pressing experiment with the oil pressing mechanical properties determination experimental device provided by the present invention are as follows:

[0103] Step 1, assembling the gasket set 2: selecting the second gasket 5 with the guide groove 20 of the preset width, thickness, quantity and diameter of the sample hole 7, synthesizing the gasket set 2 with the first gasket 4 and the third gasket set 2 with the sample hole 7 of the same diameter and tightening them with screws, and filling the oil-absorbing fiber in the oil collection hole 19;

[0104] Step 2, loading the sample: filling the oil sample 21 to be tested into the sample hole 7 in the gasket set 2 until it is flush with the third gasket 6;

[0105] Step 3, device assembly: push the gasket set 2 into the cavity of the support 1 until one side thereof fits with the column 15, and pass the connecting piece through the upper arm 13 to press the gasket set 2; pass the piston rod 3 through the through hole 16 and align it with the sample hole 7, and inject the heat transfer medium into the constant temperature bath 12;

[0106] Step 4, test: place the above-assembled device on the carrier of the material tester, start the temperature control device to stabilize the temperature at the preset value of 60°C; set the trigger force of the material tester to 0.14N, the preload speed to 30mm / min, the compression speed to 2mm / min, the sampling step to 0.2mm, the compression stroke to 18mm and the compression ratio to 90%, and test the oil sample 21 in TPA mode and record its TPA curve for calculation.

[0107] Example 2

[0108] The difference between the experimental device for measuring the mechanical properties of oil pressing according to Example 2 and Example 1 is that:

[0109] In this embodiment, the diameter of the sample hole 7 is 16 mm, and the width of the guide groove 20 is 1.5 mm.

[0110] In this embodiment, the number of the second gaskets 5 with the guide grooves 20 and the number of the second gaskets 5 without the guide grooves 20 are 15 each, that is, the depth of the sample hole 7 formed into the gasket set 2 is 30 mm.

[0111] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An experimental device for determining the mechanical properties of oil pressing, characterized in that: The device comprises: A support (1), wherein the support is provided with a cavity with a lateral opening; A gasket group (2) is detachably arranged in the cavity, and a sample space is provided in the gasket group (2) for accommodating an oil sample (21); A piston rod (3) vertically slidably connected to the support (1) and capable of extending into the sample space; A driving device, used for driving the piston rod (3) to move up and down so as to apply pressure to the oil sample; The gasket set (2) comprises a first gasket (4), a plurality of second gaskets (5) and a third gasket (6) which are stacked in sequence from bottom to top, the third gasket (6) and each of the second gaskets (5) being provided with a sample hole (7), and the plurality of sample holes (7) are combined to form the sample space; Each of the second gaskets (5) is provided with at least one oil collecting hole (19), and a portion of the second gaskets (5) among the plurality of second gaskets (5) are provided with a guide groove (20), wherein the guide groove (20) connects the sample space with the oil collecting hole (19); The oil pressing mechanical property determination experimental device also includes a temperature control device, the temperature control device including a temperature control switch (10) and a plurality of electric heating plates (8) and a temperature sensor (9) arranged in the gasket group (2), the electric heating plates (8) being used to heat the oil sample (21), and the temperature control switch (10) controlling the start and stop of the electric heating plates (8) according to a signal from the temperature sensor (9); Each of the second gaskets (5) is provided with at least one constant temperature hole (11); each of the constant temperature holes (11) on a plurality of the second gaskets (5) is combined to form a constant temperature bath (12); a heat transfer medium is provided in the constant temperature bath (12); each of the electric heating plates (8) is provided in one of the constant temperature baths (12); and the temperature sensor (9) is provided in any of the constant temperature baths (12); The support (1) is C-shaped, comprising an upper arm (13), a column (15) and a base (14) connected in sequence to form the cavity with a side opening, the first gasket (4) being in contact with the base (14), and one side of the gasket group (2) being in contact with the column (15); The upper arm (13) is provided with a through hole (16) and a plurality of positioning holes (17), the piston rod (3) is vertically slidably connected to the through hole (16) and the sample space in sequence, and each positioning hole (17) is pressed against the gasket group (2) via a connecting piece.

2. The oil pressing mechanical properties test device according to claim 1 is characterized in that: The thickness of the first gasket (4), each of the second gaskets (5) and the third gasket (6) is 0.5-1 mm, the diameter of the sample hole (7) is not less than 6 mm, the width of the guide groove (20) on each of the second gaskets (5) is 0.5-2 mm, the length is 3-20 mm and the number is 0-4, the number of the oil collecting holes (19) on each of the second gaskets (5) is the same as the number of the guide grooves (20), and the diameter of the oil collecting hole (19) is not less than 1 / 2 of the diameter of the sample hole (7).

3. The oil pressing mechanical properties test device according to claim 1 is characterized in that: Each of the thermostatic holes (11) is arc-shaped, and the total arc of at least one of the thermostatic holes (11) is not less than 180°, and the total area of ​​at least one of the thermostatic holes (11) is not less than 1 / 3 of the total area of ​​the second gasket (5).

4. The oil pressing mechanical properties test device according to claim 1, characterized in that: The diameter of the through hole (16) is not less than the diameter of the sample hole (7), and the thickness of the upper arm (13) is not less than the diameter of the through hole (16).

5. The oil pressing mechanical properties test device according to claim 1, characterized in that: The driving device is a material tester, which includes a motor and a pressing head. The motor drives the pressing head to slide up and down and pushes the piston rod downward.

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