CN203881705U - Combined electrode support - Google Patents

Abstract

The utility model provides a combined electrode bracket, which comprises two parts of a support rod and a clamp. The two are connected by bolts (3) of the support bar and screw holes (6) of the fixture to become a whole. When in use, put the cylindrical electrode (7) into the chuck (5) of the fixture for clamping and fixing, so that the effective working surface (8) of the electrode is perpendicular to the bottom surface of the container, and passes through the electrode (7) along the axis of the chuck (5). Cardiac movement adjusts experimental parameters such as the distance between electrodes. The plastic copper wire (9) welded on the back of the electrode can be put into the receiving wire groove (1) provided on the support rod, and the plastic copper wire (9) is vertically drawn out of the solution to connect to the testing equipment. The combined electrode support can realize that the effective working surface (8) of the electrode is perpendicular to the bottom surface of the container, and indirectly realizes the positioning of the counter electrode (7) in the solution by fixing the support rod. Simultaneously, due to the accommodation of the plastic copper wire (9) by the receiving wire groove (1), it is prevented that fixing tools such as screws cause damage to its plastic outer skin.

Description

A combined electrode holder

technical field

The utility model relates to a sample bracket used for electrochemical experiments, in particular to a detachable bracket composed of a support rod and a clamp, capable of clamping and positioning electrodes to be measured.

Background technique

Universities, scientific research institutes and factories often conduct small-scale electrochemical experiments. In order to simplify calculations and carry out standardized measurements at the same time, the electrodes are often specified on a surface so that all reactions only occur on this surface. This surface can be called an effective working surface. . The commonly used method of making an effective working surface is to process the electrode into a square sheet, weld the plastic copper wire on the back, and enclose the side, back and solder joints of the electrode with insulating materials. Leave only the front side, i.e. a square of standard size, as an effective working surface for laboratory in solution. The conventional encapsulation method is to put the electrode into a cylindrical plastic bucket and grout it for encapsulation. After encapsulation, the shape of the electrode is cylindrical, and a plastic copper wire is drawn out from the back to connect to the measurement equipment.

Electrochemical experiments are often carried out in containers such as small beakers. In order to ensure accurate measurement results and to effectively use the space in the container, it is necessary to place the effective working surface of each electrode perpendicular to the bottom plane of the container and suspend it relative to the solution. The electrodes need to be immobilized in the solution. Generally, in order to facilitate the operation and prevent corrosion of the fixing parts, the method of fixing plastic copper wires outside the container is often used to indirectly fix the electrodes. But this fixing method has three serious deficiencies. One is that the electrode and the welding plastic copper wire need to be folded into a 90° angle to make the effective working surface stand up. At this time, it may be caused by insufficient mechanical properties of the welding wire. The head of the working electrode is drooping and the effect cannot be achieved. The second is that in the experiment, it is often necessary to control the experimental parameters such as the distance between the electrodes, and because the distance between the fixed point of the plastic copper wire and the electrode is relatively long, the head of the working electrode often shakes due to a small external force, and it is only a change in the set parameters. affect the accuracy. The third is to fix the plastic copper wire by flat-head screws to fasten the plastic copper wire to the baffle plate. It is easy to scratch the plastic sheath of the plastic copper wire, exposing the copper wire inside and destroying its insulation.

Contents of the invention

In order to solve the problems caused by the electrode drooping in the electrochemical experiment, the shaking of the wire and the easy scratching of the plastic skin when it is fixed, the utility model provides a combined electrode bracket for the encapsulated cylindrical electrode. Ensure that the effective working surface of the electrode in the solution is perpendicular to the bottom plane of the beaker, and at the same time effectively position the electrode in the solution to prevent inaccurate measurement due to insufficient mechanical properties or shaking of the plastic copper wire. Protection from damage to the plastic skin caused by fixing tools such as screws used for fixing.

The technical scheme adopted by the utility model to solve the technical problem is: the electrode bracket is composed of two parts, a support rod and a clamp, and the support rod and the clamp are connected by bolts to form an included angle of 90°. The chuck of the fixture is designed with an open ring, and the cylindrical electrode is clamped and fixed by the tension of the ring, and the effective working surface of the electrode is erected so that it is perpendicular to the bottom surface of the container. It can ensure that the plastic copper wire does not bear the gravity of the electrode but the electrode bracket, and can ensure that the effective working surface of the electrode is perpendicular to the bottom surface of the container to prevent the electrode from sagging. At the same time, the electrode can be pushed to move along the axis of the chuck, and the process parameters such as electrode distance can be adjusted. There is a vertical wire groove on the support rod, which can lead the plastic copper wire welded on the back of the electrode out of the solution, and can also realize the positioning of the electrode by fixing the tool support rod, so that the screw and other tools can act on the support rod instead of The plastic copper wire can protect the plastic sheath of the plastic copper wire from damage.

The beneficial effect of the utility model is that the structure is simple, the reliability is high, the two parts of the support rod and the fixture can be made into accessories of different sizes and can be replaced freely to adapt to different experimental conditions, and the effective working surface of the electrode can be perpendicular to the container Bottom surface to prevent electrode sagging. At the same time, the experimental parameters such as electrode distance can be adjusted conveniently, and the insulation of plastic copper wires welded on the back of the electrodes can be improved.

Description of drawings

A combined electrode holder described in the present invention will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a partial front view of a support rod of a combined electrode holder.

Fig. 2 is a sectional view of plane A-A in Fig. 1 .

Figure 3 is a sectional view of the B-B plane in Figure 1

Fig. 4 is a sectional view of B-B plane in Fig. 1

Fig. 5 is a partial front view of the clamp of the combined electrode holder.

Fig. 6 is a sectional view of plane D-D in Fig. 5 .

Figure 7 is a sectional view of the E-E plane in Figure 6

Fig. 8 is a front view and a cross-sectional view of the center F-F plane of the combined electrode holder assembled and loaded with electrodes.

Among them: 1. Wire slot, 2. Grip rod, 3. Bolt, 4. Transverse rod, 5. Collet, 6. Screw hole, 7. Electrode, 8. Effective working surface of electrode, 9. Plastic copper wire.

Detailed ways

The combined electrode holder described in the present invention will be further described in detail below in conjunction with the accompanying drawings. A combined electrode bracket, which is suitable for the positioning and support of electrodes in a solution, includes two parts: a support rod and a fixture. In order to ensure the mechanical properties and corrosion resistance of the combined electrode bracket, it is generally better Made of tough, corrosion-resistant hard plastics, such as polytetrafluoroethylene and ABS engineering plastics. Figure 1 shows the support rod part of the combined electrode bracket, which is a whole long cylinder, which is divided into three parts. One is the upper part of the support rod, which is the wire receiving groove 1. Its cross-sectional view is shown in Figure 2. The structure is that the cylinder is processed into a hollow and a layer is cut off on the front to become an open hollow ring, which can be plugged in during the experiment. The plastic copper wire (9) welded on the electrode back side is guided to stretch out the liquid surface of the solution. The second is the middle part of the support rod, which is the grip rod 2, its cross-sectional view is shown in Figure 3, and the structure is a solid cylinder that retains the original state. The main function is to hold the grip bar 2 for assembly operation when assembling the bracket, and the solid cylindrical design is also used to enhance the mechanical properties of this part. The third is the lower part of the support rod, which is mainly the bolt 3, whose structure is an externally threaded bolt, whose main function is to connect the support rod and the fixture, and assemble the two parts into a whole combined electrode bracket. It should be noted that the three parts of the support rod should be made by segmental machining of a long cylindrical monolith, which can ensure the mechanical properties of the support rod and the coaxiality of the three parts.

FIG. 4 is a front view of the clamp part of the combined electrode holder, and its central cross-sectional view is shown in FIG. 5 . The fixture part is mainly composed of a transverse bar 4 and a collet 5 . The transverse bar 4 is a horizontal solid cylinder, and a screw hole 6 matched with the bolt 3 of the support bar is drilled at one end, as shown in FIG. 6 . The main function of the screw hole 6 is to be used for bolt connection with the bolt 3 to form a combined electrode support. According to the size of the electrode and the depth of the solution, different sizes of clamps and support rods can be combined. The other end of the transverse rod 4 is connected with the chuck 5 . The function of fixture 5 is to fix the electrodes. In order to accommodate the electrodes conveniently, an open hollow ring with 1/3 of the circumference removed is used. The inner diameter of the jig 5 is slightly smaller than the outer diameter of the encapsulated cylindrical electrode, and when the electrode is put in, the tension on both sides of the jig is used to tighten the electrode. The transverse rod 4 and the chuck 5 need to be fixedly connected. Considering that both of them have a circular appearance and only one point of contact after the connection, the mechanical properties are not stable. The lower section of 5 cuts off a part to form a plane and then connects, which can increase the contact area of the connected part to improve the mechanical properties.

The front view of the combined electrode holder after the electrode is installed and the cross-sectional view of its center F-F surface are shown in Figure 8. The electrode 7 shown in the figure is loaded into the chuck 5 and fixed by its tension, and the electrode 7 can be pushed along the The axial movement of the chuck 5 can be conveniently positioned to accurately adjust parameters such as the electrode distance. When the device is put into the experimental container vertically, the effective working surface 8 of the electrode is vertically erected, and the load-bearing work perpendicular to the bottom surface of the container endows a combined electrode support with better mechanical properties, so that the plastic copper wire 9 welded on the back is not stressed, Sagging of the electrode 7 is prevented. The plastic copper wire 9 welded on the back of the electrode is put into the receiving wire groove 1, which has two functions: one is to indirectly fix the electrode 7 by tightening the support rod with fixing tools such as screws during the experiment, so as to prevent the direct fixing of the plastic copper wire 9 that may cause The destruction of its outsourcing plastic sheath; The 2nd, the plastic copper wire 9 is vertically led out of the solution and connected to testing equipment.

The above is only a specific embodiment of the utility model, and it cannot limit the scope of utility model implementation, so the replacement of its equivalent components, or the equivalent changes and modifications made according to the patent protection scope of the utility model should still belong to areas covered by this patent. In addition, the technical features and technical features, technical features and technical solutions, and technical solutions and technical solutions in the utility model can be used in free combination.

Claims (3)

1. a combined electrode suppor, form with bolts is linked to be whole by support bar and fixture, and can to the support bar of different size and fixture, carry out free replacement according to experiment condition.

2. combined electrode suppor according to claim 1, it is characterized in that: chuck (5) adopts the longer opening toroidal design of lateral separation, can cylindric electrode (7) be clamped and be located, make effective workplace of electrode perpendicular to the bottom surface of container, and make electrode along the axle center of fixture to moving, adjust interelectrode distance.

3. combined electrode suppor according to claim 1, it is characterized in that: support bar is provided with receives wire casing (1), can the copper cash of moulding of electrode back side welding vertically be drawn outside container, and can prevent from accommodating moulding copper cash (9), prevent that the setting tools such as screw in experiment from damaging its plastic peel.