Double-method liquid surface tension coefficient measuring device

Abstract

The utility model discloses a double-method liquid surface tension coefficient measuring device which comprises a base, a support column, a lifting platform, a tray and a water tank vessel, wherein the support column and the lifting platform are arranged on the base; the tray is arranged on the lifting platform; the device is characterized in that a beaker is mounted on the water tank vessel; a capillary tube clamp, a capillary tube and a needle tip are detachably installed on the supporting column, wherein the capillary tube and the needle tip are detachably installed on the capillary tube clamp. According to the utility model, the capillary tube clamp, the capillary tube and the needle tip are arranged on the support column, so that the liquid surface tension coefficient can be measured by using a capillary tube method, and the pressure testing assembly is arranged on the support column, so that the liquid surface tension coefficient can be measured by using a pull-off method. Therefore, the experiment cost is reduced, the occupied area of the experiment device is reduced, and the experiment range is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of surface tension coefficient measuring devices, in particular to a double-method liquid surface tension coefficient measuring device. Background Art

[0002] The surface tension coefficient of liquid is an important parameter that reflects the properties of liquid. There are many ways to measure the surface tension coefficient of liquid, such as the pull-off method and the capillary measurement method. However, in the existing technology, different methods of measuring the surface tension coefficient of liquid need to be measured on corresponding experimental devices respectively, and it is impossible to perform multiple measurements on the same experimental device, thereby increasing the cost of the experiment and the area occupied by the experimental device, and at the same time narrowing the scope of the experiment. For this reason, a dual-method liquid surface tension coefficient measuring device is proposed, which can reduce the experimental cost and the area occupied by the experimental device and expand the scope of the experiment. Summary of the invention

[0003] The utility model aims to solve the above problems and provides a double-method liquid surface tension coefficient measuring device.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a double-method liquid surface tension coefficient measuring device, comprising a base, a pillar and a lifting platform installed on the base, a tray installed on the lifting platform, and a sink vessel installed on the tray; the characteristic is that a beaker is installed on the sink vessel; a capillary clamp is detachably installed on the pillar, and a capillary and a needle tip are detachably installed on the capillary clamp.

[0005] Preferably, the pillar is also equipped with a mounting seat for driving the capillary clamp to rise and fall; the capillary clamp is rotatably mounted on the mounting seat; and a locking screw for locking the mounting seat is also installed on the mounting seat.

[0006] Preferably, a protective pad is installed on the capillary clamp to protect the capillary.

[0007] Preferably, the invention further comprises a micrometer eyepiece device for measuring the capillary; the micrometer eyepiece device comprises a measuring frame, a screw mounted on the measuring frame, a hand wheel connected to the screw, a lifting slider mounted on the screw, and a micrometer eyepiece mounted on the lifting slider; a guide rod for guiding the lifting slider is also mounted on the measuring frame.

[0008] Preferably, a mounting frame for rotating the micrometer eyepiece is installed on the lifting slider; the mounting frame includes a fixed base frame, a rotating frame rotatably mounted on the fixed base frame, and a locking screw for fixing the rotating frame; a scale is also provided on the measuring fixed frame; and scale lines are provided on the lifting slider.

[0009] Preferably, it also includes a pressure testing assembly detachably mounted on the pillar; the pressure testing assembly includes a fixing seat, a pressure sensor mounted on the fixing seat, and a lifting ring connected to the pressure sensor.

[0010] Preferably, a fixing screw for adjusting and fixing the fixing base is installed on the fixing base.

[0011] Preferably, the lifting platform comprises a guide sleeve on the base, a rotating sleeve installed outside the guide sleeve, and a telescopic rod movably installed in the rotating sleeve and connected to the tray.

[0012] Preferably, the base is also provided with a plurality of horizontal adjustment screws and a photoelectric door assembly connected to the rotating sleeve.

[0013] Preferably, the photoelectric gate assembly includes a code disc mounted on a rotating sleeve and a photoelectric gate adapted to the code disc and fixed on a base.

[0014] The beneficial effects of the utility model are as follows: by installing a capillary clamp, a capillary and a needle tip on the pillar, the surface tension coefficient of the liquid can be measured by the capillary method; by installing a pressure test component on the pillar, the surface tension coefficient of the liquid can be measured by the pull-off method; the surface tension coefficient of the liquid can be measured by two methods on the same experimental device, thereby reducing the cost of the experiment, reducing the floor space occupied by the experimental device, and expanding the scope of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a partial structural schematic diagram of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the micrometer eyepiece device of the utility model.

[0018] Figure 4 It is a structural schematic diagram of another experimental method of the utility model.

[0019] Figure 5 It is a partial sectional view of the utility model.

[0020] Legend: 1. Base; 101. Horizontal adjustment screw; 2. Pillar; 3. Lifting platform; 301. Guide sleeve; 302. Rotating sleeve; 303. Telescopic rod; 4. Tray; 5. Sink; 6. Beaker; 7. Capillary clamp; 701. Capillary; 702. Needle tip; 703. Mounting seat; 704. Protective pad; 705. Locking screw; 8. Pressure test assembly; 801. Fixing seat; 802. Pressure sensor; 803. Lifting ring; 804, fixing screw; 9, photoelectric gate assembly; 901, code disk; 902, photoelectric gate; 10, micrometer eyepiece device; 1001, measuring bracket; 1002, screw; 1003, hand wheel; 1004, lifting slider; 1005, micrometer eyepiece; 1006, guide rod; 1007, mounting bracket; 1008, fixed base; 1009, rotating bracket; 1010, locking screw; 1011, scale; 1012, scale line. DETAILED DESCRIPTION

[0021] Next, we will further explain the double-method liquid surface tension coefficient measuring device described in the present invention in conjunction with the accompanying drawings.

[0022] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Participate in the Figure 1-2As shown, a dual-method liquid surface tension coefficient determination device in this embodiment includes a base 1, a support 2 and a lifting platform 3 installed on the base 1, a tray 4 installed on the lifting platform 3, and a sink container 5 installed on the tray 4; it is characterized in that a beaker 6 is installed on the sink container 5; a capillary clamp 7 and a capillary 701 and a needle tip 702 detachably installed on the support 2 are detachably installed; the capillary clamp 7, the capillary 701 and the needle tip 702 are installed on the support 2, and the liquid surface tension coefficient can be measured by the capillary 701 method, and the pressure test component 8 is installed on the support 2 to measure the liquid surface tension coefficient by the pull-off method. The liquid surface tension coefficient can be measured by two methods on the same experimental device, thereby reducing the cost of the experiment, reducing the floor space of the experimental device, and expanding the scope of the experiment.

[0025] Participate in the Figure 2 As shown, the pillar 2 is also equipped with a mounting seat 703 for driving the capillary clamp 7 to rise and fall; the capillary clamp 7 can be rotatably mounted on the mounting seat 703; the capillary clamp 7 is also equipped with a protective pad 704 for protecting the capillary 701; the mounting seat is also equipped with a locking screw 705 for locking the mounting seat 703; the protective pad 704 can protect and prevent the capillary 701 from slipping, thereby facilitating the fixation of the capillary 701 by the capillary clamp 7; the locking screw 705 can lock the mounting seat 703 after the mounting seat 703 is adjusted along the pillar height, thereby facilitating the fixation of the mounting seat 703.

[0026] Participate in the Figure 3As shown, it also includes a micrometer eyepiece device 10 for measuring the capillary 701; the micrometer eyepiece device 10 includes a measuring fixed frame 1001, a screw 1002 installed on the measuring fixed frame 1001, a hand wheel 1003 connected to the screw 1002, a lifting slider 1004 installed on the screw 1002, and a micrometer eyepiece 1005 installed on the lifting slider 1004; the measuring fixed frame 1001 is also equipped with a guide rod 1006 for guiding the lifting slider 1004; the lifting slider 1004 is equipped with a mounting frame 1007 for rotating the micrometer eyepiece 1005; the mounting frame 1007 includes a fixed base frame 1008, a rotating frame 1009 rotatably mounted on the fixed base frame 1008, and a locking screw 1010 for fixing the rotating frame 1009; the measuring fixed frame 1001 is also provided with a scale 1011; The lifting slider 1004 is provided with a scale line 1012; by rotating the hand wheel 1003, the hand wheel drives the screw 1002 to rotate, and the screw 1002 drives the lifting slider 1004 to move up and down along the guide rod 1006, and the lifting slider 1004 drives the mounting frame 1007 and the micrometer eyepiece 1005 installed on the mounting frame 1007 to move up and down, so as to facilitate the height adjustment of the micrometer eyepiece 1005; by respectively setting a scale 1011 and a scale line 1012 on the measuring fixed frame 1001 and the lifting slider 1004, the lifting accuracy of the lifting slider 1004 is improved; the micrometer eyepiece 1005 is driven by the rotating frame 1009 to rotate along the fixed base frame 1008 to adjust the angle of the micrometer eyepiece 1005, and after the adjustment is completed, the rotating frame 1009 is locked by the locking screw 1010, so as to facilitate the adjustment of the angle of the micrometer eyepiece 1005.

[0027] Participate in the Figure 4 As shown, it also includes a pressure test assembly 8 that can be detachably mounted on the pillar 2; the pressure test assembly 8 includes a fixing seat 801, a pressure sensor 802 mounted on the fixing seat 801, and a lifting ring 803 connected to the pressure sensor 802; the fixing seat 801 is provided with a fixing screw 804 for adjusting and fixing the fixing seat 801; the fixing seat 801 can be fixed after being raised and lowered along the pillar by using the fixing screw 804, thereby facilitating the fixation of the fixing seat 801.

[0028] Participate in the Figure 5 As shown, the lifting platform 3 includes a guide sleeve 301 on the base 1, a rotating sleeve 302 installed outside the guide sleeve 301, and a telescopic rod 303 movably installed in the rotating sleeve 302 and connected to the tray 4; by rotating the rotating sleeve 302, the rotating sleeve 302 rotates because it is threadedly connected to the telescopic rod 303 to drive the telescopic rod 303 to move, and the telescopic rod 303 drives the tray 4 to be raised and lowered, thereby facilitating the lifting and lowering adjustment of the tray 4.

[0029] Participate in the Figure 5 As shown, a photoelectric gate assembly 9 connected to the rotating sleeve 302 is also installed on the base 1; the photoelectric gate assembly 9 includes a code disk 901 installed on the rotating sleeve 302 and a photoelectric gate 902 adapted to the code disk 901 and fixed on the base 1; a plurality of horizontal adjustment screws 101 are also installed on the base 1; the base 1 can be adjusted by using the horizontal adjustment screws 101 to keep the base 1 level, thereby improving the accuracy of the experiment.

[0030] Experimental process of the utility model:

[0031] 1. Experimental process of measuring the surface tension coefficient of liquid using a capillary tube. First, place the sink vessel 5 with the bottom facing upward on the tray 4. Then place a beaker 6 on the bottom of the sink vessel 5 and pour water into the beaker 6. Then install the capillary clamp 7 on the mounting seat 703. Install the capillary 701 and the needle tip 702 on the capillary clamp 7 and ensure that the bottom end surface of the capillary is 2-3 cm lower than the needle tip. Then install the mounting seat 703 on the pillar 2. Adjust the height of the mounting seat 703 on the pillar 2 and fix it with the locking screw 705. Insert the capillary 701 and the needle tip 702 into the water in the beaker 6. Under the action of atmospheric pressure, the water in the beaker 6 enters the interior of the capillary 701. The water in the capillary 701 The surface will rise, and then the rotating sleeve 302 is rotated. The rotating sleeve 302 rotates because it is threadedly connected with the telescopic rod 303, which drives the telescopic rod 303 to move. The telescopic rod 303 drives the tray 4 to move, and the tray 4 drives the sink utensil 5 and the beaker 6 to move until the needle tip 702 is just in contact with the horizontal surface in the beaker 6, and then the micrometer eyepiece device 10 is used to measure the height of the water surface in the capillary 701, and then the beaker 6 is driven downward in the above-continuation manner, so that the needle tip 702 is on the outside of the beaker 6, and then the height of the needle tip 702 is measured by the micrometer eyepiece device 10, and the height of the needle tip 702 is subtracted from the height of the water surface in the capillary 701 The height difference h from the height of the water surface in the capillary 701 to the horizontal plane of the beaker 6 can be obtained;

[0032] Then, the capillary clamp 7 is rotated 90 degrees along the mounting seat to make the capillary 701 and the needle tip 702 parallel to the base 1, and then the height of the micrometer eyepiece 1005 is adjusted by the micrometer eyepiece device 10 until it is the same height as the capillary 701, and the inner diameter r of the capillary 701 is measured by the micrometer eyepiece 1005, and according to the density ρ of water and the acceleration of gravity g, the surface tension coefficient of the liquid is finally obtained by using the formula α=1 / 2(ρgr)(h+r / 3);

[0033] 2. Experimental process of measuring liquid surface tension coefficient by pull-off method: first, install pressure test assembly 8 on pillar 2, and adjust the height of fixing seat 801 on pillar 2. After adjustment, fix it with fixing screw 804, and then connect pressure sensor 802 and photoelectric gate 902 on fixing seat 801 to tester respectively, and then calibrate pressure sensor 802, turn on the power switch of tester, preheat the tester and enter into "sensor sensitivity measurement experiment interface", and then hang weight plate 901 on the small hook at the end of pressure sensor 802, and set the pulling force value to zero; then adjust the base 1 to level by level bubble, load weights of mass such as 0g, 0.5g, 1.0g, 1.5g, 2.0g on weight plate 901, wait for the voltage value on tester to be stable, input the voltage value under the action of weight gravity on weight plate 901 when it is still, and then press "sensitivity" button on tester to get sensitivity K of pressure sensor 802;

[0034] Then, use a vernier caliper to measure the outer diameter D1 and inner diameter D2 of the metal ring on the hanging ring 803, and before the experiment, place the hanging ring 803 in a NaOH solution and soak it for 20-30 seconds, then wash it with clean water, and at the same time clean the sink container 5 and add the liquid to be tested; then hang the hanging ring 803 on the small hook at the end of the pressure sensor 802, and enter the tester into the "liquid surface tension coefficient measurement experiment interface", set the tension value to zero, set a suitable threshold voltage, and then rotate the rotating sleeve 302. The rotating sleeve 302 rotates because it is threadedly connected to the telescopic rod 303, driving the telescopic rod 303 to move upward, the telescopic rod 303 drives the tray 4 to move, and the tray 4 drives the sink container 5 to move upward until the lower edge of the hanging ring 803 is completely Immerse in the liquid to be tested, set the displacement to zero on the tester, press the "Start" button, and then rotate the rotating sleeve 302 in the opposite direction. The rotating sleeve 302 rotates because it is threadedly connected to the telescopic rod 303, and the telescopic rod 303 drives the tray 4 to move. The tray 4 drives the sink container 5 to move downward. When the liquid level slowly drops, an annular liquid film will be formed between the ring 803 and the liquid surface. The liquid level continues to drop until the liquid film breaks and the experiment is stopped. Then, the voltmeter reading U1 at the moment before the annular liquid film is about to break and the voltmeter reading U2 at the moment after the liquid film is broken are found from the experimental data on the tester, and the surface tension coefficient of the liquid is obtained by the formula α=(U1-U2) / K×π(D1+D2).

[0035] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A double-method liquid surface tension coefficient measuring device, comprising a base (1), a support (2) and a lifting platform (3) mounted on the base (1), a tray (4) mounted on the lifting platform (3), and a water tank (5) mounted on the tray (4); wherein the device comprises: A beaker (6) is mounted on the water tank vessel (5); a capillary clamp (7) and a capillary (701) and a needle tip (702) detachably mounted on the capillary clamp (7) are detachably mounted on the support column (2).

2. A dual-method liquid surface tension coefficient measuring device according to claim 1, characterized in that: The support (2) is also provided with a mounting seat (703) for driving the capillary clamp (7) to rise and fall; the capillary clamp (7) is rotatably mounted on the mounting seat (703); and a locking screw (705) for locking the mounting seat (703) is also mounted on the mounting seat (703).

3. A dual-method liquid surface tension coefficient measuring device according to claim 2, characterized in that: The capillary clamp (7) is also provided with a protective pad (704) for protecting the capillary (701).

4. A dual-method liquid surface tension coefficient measuring device according to claim 1, characterized in that: Also included is a micrometer eyepiece device (10) for measuring the capillary (701); the micrometer eyepiece device (10) comprises a measuring fixed frame (1001), a screw (1002) mounted on the measuring fixed frame (1001), a hand wheel (1003) connected to the screw (1002), a lifting slider (1004) mounted on the screw (1002), and a micrometer eyepiece (1005) mounted on the lifting slider (1004); a guide rod (1006) for guiding the lifting slider (1004) is also mounted on the measuring fixed frame (1001).

5. A dual-method liquid surface tension coefficient measuring device according to claim 4, characterized in that: The lifting slider (1004) is provided with a mounting frame (1007) for rotating the micrometer eyepiece (1005); the mounting frame (1007) comprises a fixed base frame (1008), a rotating frame (1009) rotatably mounted on the fixed base frame (1008), and a locking screw (1010) for fixing the rotating frame (1009); the measuring fixed frame (1001) is also provided with a scale (1011); and the lifting slider (1004) is provided with scale lines (1012).

6. A dual-method liquid surface tension coefficient measuring device according to claim 1, characterized in that: It also includes a pressure testing assembly (8) that is detachably mounted on the pillar (2); the pressure testing assembly (8) includes a fixing seat (801), a pressure sensor (802) mounted on the fixing seat (801), and a lifting ring (803) connected to the pressure sensor (802).

7. A dual-method liquid surface tension coefficient measuring device according to claim 6, characterized in that: A fixing screw (804) for adjusting and fixing the fixing seat (801) is installed on the fixing seat (801).

8. A dual-method liquid surface tension coefficient measuring device according to claim 1, characterized in that: The lifting platform (3) comprises a guide sleeve (301) on a base (1), a rotating sleeve (302) mounted outside the guide sleeve (301), and a telescopic rod (303) movably mounted inside the rotating sleeve (302) and connected to the tray (4).

9. A dual-method liquid surface tension coefficient measuring device according to claim 8, characterized in that: The base (1) is also provided with a plurality of horizontal adjustment screws (101) and a photoelectric door assembly (9) connected to the rotating sleeve (302).

10. A dual-method liquid surface tension coefficient measuring device according to claim 9, characterized in that: The photoelectric gate assembly (9) comprises a code disc (901) mounted on a rotating sleeve (302) and a photoelectric gate (902) adapted to the code disc (901) and fixed on a base (1).

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