Thermocouple check meter capable of conveniently replacing clamping pliers

Abstract

The utility model discloses a thermocouple check meter capable of conveniently replacing clamping pliers, which relates to the technical field of detectors and comprises a detector body and two meter pens, an adjusting knob is movably mounted on the front side of the detector body, and a display screen is fixedly mounted on the detector body above the adjusting knob. One end of each meter pen is fixedly provided with a contact pin, the outer side of each contact pin is movably provided with two movable rings, one end, far away from each contact pin, of each meter pen is fixedly provided with a connecting line, and one end, far away from each meter pen, of each connecting line is inserted into a corresponding insertion hole in the top of the detector body. The alligator clamp is arranged at one end of the meter pen, and the alligator clamp is composed of the fixed clamp body, the movable clamp body, the sleeve, the first metal elastic sheet and the like, so that the fixed clamp body and the movable clamp body can move on the outer side of the meter pen by means of the sleeve, and switching between a probe mode and a clamp mode at one end of the meter pen is facilitated; and the condition that the crocodile clamp is separated from the meter pen and lost is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of detectors, in particular to a thermocouple tester with conveniently replaceable clamping pliers. Background Art

[0002] Thermocouples are commonly used temperature measuring elements in temperature measuring instruments. Thermocouples use two conductors or semiconductors of different materials to form a loop. When there is a temperature difference between the two ends, an electromotive force will be generated. Thermocouples indirectly measure the temperature by measuring this electromotive force and converting it into a readable electrical signal.

[0003] When performing resistance detection, voltage detection or stability detection on a thermocouple, a multimeter is used to measure the resistance and voltage values ​​of the thermocouple, so as to preliminarily judge whether the wire of the thermocouple is intact and whether there is a break or short circuit. When the thermocouple is detected by a multimeter, the thermocouple is detected using the test leads provided by the multimeter, and a detachable alligator clamp is provided at one end of the test lead to meet different detection requirements, such as the Chinese utility model patent disclosed by publication number CN210090522U: Multimeter probe fixing clip, which is used when it is inconvenient to measure by holding the multimeter probe. , the multimeter probe can be connected to the metal needle through the docking part, and then the clip body can be fixed on the object to be tested, so that the metal needle can contact the position to be tested to achieve measurement. However, since the clip body of the application is separated from the probe of the multimeter, when stored, since the clip is separated from the probe, the clip is easy to be lost during storage or use, and thus it is impossible to complete the matching with the probe. When in use, the separate clip needs to be manually connected to the probe by the user, and after the clip is clamped on the object to be tested, the metal needle in the clip needs to be connected to the object to be tested, which makes it inconvenient to adjust the contact connection between the metal needle placed inside the clip and the object to be tested. Utility Model Content

[0004] The purpose of the utility model is to provide a thermocouple tester with conveniently replaceable clamping pliers, which can effectively solve the connection problem between the existing multimeter probe and the clamp body and the problem of inconvenience in use proposed in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A thermocouple tester with conveniently replaceable clamping pliers comprises a tester body and two test leads, an adjusting knob being movably mounted on the front side of the tester body, a display screen being fixedly mounted on the tester body above the adjusting knob, contact pins being fixedly mounted on one end of the two test leads respectively, two movable rings being movably mounted on the outside of the contact pins, connecting wires being fixedly mounted on the ends of the two test leads away from the contact pins respectively, the ends of the connecting wires away from the test leads being plugged into corresponding sockets on the top of the tester body, the other ends of the connecting wires extending into the test leads and being electrically connected to the contact pins, an alligator clamp being movably mounted on the other end of the test leads, the alligator clamp comprising a fixed clamp body and a movable clamp body, a sleeve being fixedly mounted on one end of the fixed clamp body, the fixed clamp body and the movable clamp body being movably connected via two connecting shafts, and a second metal spring being movably mounted on the connecting shaft located on one side of the fixed clamp body.

[0007] Preferably, two first positioning grooves are provided on the outside of the test lead, and the first positioning grooves are provided along the outer contour of the test lead and are ring-shaped. Through the provision of the two first positioning grooves, the entire crocodile clamp can be limited after being pulled and moved on the outside of the test lead.

[0008] Preferably, a plurality of arc-shaped expansion sheets are fixedly connected between the two movable rings, and the two movable rings are respectively inserted and installed on the outside of the contact pin, and the contact pin located on one side of the movable ring is also equipped with a compression spring. With the help of the two movable rings and the plurality of expandable and contractible arc-shaped expansion sheets, the alligator clamp can be electrically connected to the connecting wire through the contact pin after being pulled out and moved outside the test lead.

[0009] Preferably, fixing seats are fixedly mounted on both sides of the movable clamp body, and mounting grooves are provided in the fixing seats.

[0010] Preferably, a plurality of limit grooves are provided on the outer side of the connecting shaft, and the connecting shaft is inserted and installed in two through holes coaxial with one side of the fixed clamp body and the movable clamp body, a mounting ring is fixedly installed on one side of the second metal spring sheet, and a plurality of limit blocks are fixedly installed on the inner side of the mounting ring, the mounting ring is inserted and installed on the connecting shaft located on one side of the fixed clamp body, and the limit blocks are clamped in the corresponding limit grooves, and the side of the second metal spring sheet away from the mounting ring is inserted and installed in the mounting groove and fixed by screws. Through the setting of the second metal spring sheet, the movable clamp body can obtain pressure in the direction of the fixed clamp body, thereby enabling the clamping function of the fixed clamp body and the movable clamp body.

[0011] Preferably, a plurality of first metal springs are fixedly installed on the inner side of the sleeve, a protrusion is fixedly installed on one side of the first metal spring, and a second positioning groove is also opened in the sleeve located on one side of the first metal spring. The sleeve is inserted and installed on the outside of the detector body, and the protrusion on one side of the first metal spring is clamped in the corresponding first positioning groove. The second positioning groove can be clamped on the outside of a plurality of arc-shaped expansion sheets. The fixed clamp body is inserted and installed on the outside of the detector body through the sleeve, so that the entire crocodile clamp can be moved on the outside of the detector body, thereby realizing the rapid switching of the probe mode and the clamp mode of the test lead.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model discloses a thermocouple tester with conveniently replaceable clamping pliers. An alligator clamp is arranged at one end of the test lead. The alligator clamp is composed of a fixed clamp body, a movable clamp body, a sleeve, a first metal spring and other structures. The fixed clamp body and the movable clamp body can be moved outside the test lead by means of the sleeve, so as to facilitate the switching of the probe mode and the clamp mode at one end of the test lead, and effectively prevent the alligator clamp from being separated and lost from the test lead.

[0014] Two movable rings are installed on the outside of the contact pin, and a plurality of arc expansion pieces are movably connected between the two movable rings. After the alligator clamp is moved to one end of the test lead, the entire alligator clamp is electrically connected to the contact pin through the arc expansion piece and the movable ring, which facilitates electrical connection with the object to be tested through the alligator clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the test lead structure of the utility model;

[0017] Figure 3 This is a cross-sectional view of the test lead and alligator clamp structure of the utility model;

[0018] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0019] Figure 5 This is a schematic diagram of the disassembly of the alligator clamp structure of the utility model;

[0020] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0021] In the figure: 1. detector body; 2. adjustment knob; 3. display screen; 4. connecting wire; 5. test lead; 6. crocodile clamp; 7. fixed clamp body; 8. movable clamp body; 9. sleeve; 10. movable ring; 11. first positioning groove; 12. contact needle; 13. arc expansion piece; 14. compression spring; 15. first metal spring piece; 16. bump; 17. fixing seat; 18. mounting groove; 19. connecting shaft; 20. limit groove; 21. mounting ring; 22. limit block; 23. second metal spring piece; 24. second positioning groove. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figure 1-Figure 6 As shown, the utility model provides a thermocouple tester with conveniently replaceable clamping pliers, comprising a tester body 1 and two test leads 5, an adjusting knob 2 is movably installed on the front side of the tester body 1, a display screen 3 is fixedly installed on the tester body 1 above the adjusting knob 2, contact pins 12 are fixedly installed on one end of the two test leads 5, two movable rings 10 are movably installed on the outside of the contact pins 12, connecting wires 4 are fixedly installed on the ends of the two test leads 5 away from the contact pins 12, the ends of the connecting wires 4 away from the test leads 5 are plugged into the corresponding jacks on the top of the tester body 1, the other end of the connecting wire 4 extends into the test leads 5 and is electrically connected to the contact pins 12, an alligator clamp 6 is movably installed on the other end of the test leads 5, the alligator clamp 6 comprises a fixed clamp body 7 and a movable clamp body 8, a sleeve 9 is fixedly installed on one end of the fixed clamp body 7, the fixed clamp body 7 and the movable clamp body 8 are movably connected through two connecting shafts 19, and the connecting shaft 19 located on one side of the fixed clamp body 7 is also movably installed with a second metal spring 23.

[0024] like Figure 2 , Figure 4 As shown, two first positioning grooves 11 are provided on the outer side of the test lead 5. The first positioning groove 11 is provided along the outer contour of the test lead 5 and is annular. Through the provision of the two first positioning grooves 11, the entire crocodile clamp 6 can be limited after being pulled and moved on the outer side of the test lead 5;

[0025] like Figure 4-Figure 6As shown, a plurality of arc expansion pieces 13 are fixedly connected between the two movable rings 10, and the two movable rings 10 are respectively inserted and installed on the outside of the contact pin 12, and the contact pin 12 located on one side of the movable ring 10 is also provided with a compression spring 14. With the help of the two movable rings 10 and the plurality of expandable and contractible arc expansion pieces 13, the crocodile clamp 6 can be electrically connected to the connecting line 4 through the contact pin 12 after being pulled out and moved on the outside of the test lead 5. Fixed seats 17 are fixedly installed on both sides of the movable clamp body 8, and a mounting groove 18 is provided in the fixed seat 17. A plurality of limiting grooves 20 are provided on the outside of the connecting shaft 19. The connecting shaft 19 is inserted and installed in two through holes coaxial with one side of the fixed clamp body 7 and the movable clamp body 8. A mounting ring 21 is fixedly installed on one side of the second metal spring piece 23, and a plurality of limiting blocks 22 are fixedly installed on the inner side of the mounting ring 21. The mounting ring 21 is inserted and installed on the connecting shaft 19 located on one side of the fixed clamp body 7, and the limiting blocks 22 are clamped on the opposite side. The second metal spring piece 23 is inserted into the mounting groove 18 on one side away from the mounting ring 21 and fixed by a screw. Through the setting of the second metal spring piece 23, the movable clamp body 8 can obtain pressure in the direction of the fixed clamp body 7, thereby enabling the clamping function of the fixed clamp body 7 and the movable clamp body 8. A plurality of first metal spring pieces 15 are fixedly installed on the inner side of the sleeve 9, and a protrusion 16 is fixedly installed on one side of the first metal spring piece 15. A second positioning groove 24 is also provided in the sleeve 9 on one side of the first metal spring piece 15. The sleeve 9 is inserted into the outside of the detector body 1, and the protrusion 16 on one side of the first metal spring piece 15 is clamped in the corresponding first positioning groove 11. The second positioning groove 24 can be clamped on the outside of a plurality of arc-shaped expansion pieces 13. The fixed clamp body 7 is inserted into the outside of the detector body 1 through the sleeve 9, so that the entire crocodile clamp 6 can be moved outside the detector body 1, thereby realizing the rapid switching of the probe mode and the clamp mode of the test lead 5.

[0026] It should be noted that the utility model is a thermocouple tester with easily replaceable clamps. When testing the thermocouple through the detector body 1, the contact pins 12 at one end of the two test leads 5 can be respectively contacted with the poles at one end of the thermocouple, so that through the cooperation of the detector body 1 and the test leads 5 and the measurement of the resistance value, it can be preliminarily judged whether the wires of the thermocouple are intact, whether there is a break or short circuit, or the detector body 1 is adjusted to the voltage measurement gear through the adjustment knob 2, the two ends of the thermocouple are connected, and the voltage value displayed on the multimeter is observed. Since the working principle of the thermocouple is based on the thermoelectric effect, that is, the temperature difference produces an electric potential difference, the temperature of the environment where the thermocouple is located can be indirectly inferred by measuring the voltage at both ends of the thermocouple. If the voltage value is abnormal, it may indicate that the thermocouple is damaged or there is a problem with the measurement environment;

[0027] When the alligator clamp 6 is needed to detect some thermocouples, the fixed clamp body 7 and the movable clamp body 8 can be directly pulled to one side, so that the fixed clamp body 7 drives the sleeve 9 to move outside the test lead 5. When the sleeve 9 drives the protrusions 16 on one side of the multiple first metal springs 15 inside to move to the first positioning groove 11 close to the contact pin 12, the protrusions 16 on one side of the first metal springs 15 can be inserted into the corresponding first positioning groove 11 by means of the resilience of the first metal springs 15, and the sleeve 9 simultaneously compresses the multiple arc expansion sheets 13 toward the center of the contact pin 12, and makes the multiple arc expansion sheets 13 squeeze the movable rings 10 on both sides to one side respectively. Move, so that the movable ring 10 compresses the compression spring 14 on the outside of the contact pin 12 toward the first positioning groove 11 and the end of the contact pin 12. When the multiple arc-shaped expansion pieces 13 are placed in the sleeve 9, the multiple arc-shaped expansion pieces 13 can be inserted into the second positioning groove 24 by utilizing the resilience of the metal material, so that the entire crocodile clamp 6 can be quickly withdrawn and fixed, and the fixed clamp body 7 and the movable clamp body 8 are electrically connected to the contact pin 12 through the sleeve 9 and the arc-shaped expansion piece 13. Then, the fixed clamp body 7 and the movable clamp body 8 can be directly rotated with the two connecting shafts 19 as the axis and clamped on the pole of the thermocouple with the force of the two second metal spring pieces 23.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A thermocouple tester with conveniently replaceable clamping pliers, characterized in that: The device comprises a detector body (1) and two test leads (5), wherein an adjustment knob (2) is movably mounted on the front side of the detector body (1), a display screen (3) is fixedly mounted on the detector body (1) above the adjustment knob (2), and contact pins (12) are fixedly mounted on one end of each of the two test leads (5); Two movable rings (10) are movably mounted on the outer side of the contact pin (12); a connecting wire (4) is fixedly mounted on one end of each of the two test leads (5) away from the contact pin (12); one end of the connecting wire (4) away from the test lead (5) is plugged into a corresponding socket on the top of the detector body (1); the other end of the connecting wire (4) extends into the test lead (5) and is electrically connected to the contact pin (12); an alligator clamp (6) is movably mounted on the other end of the test lead (5); the alligator clamp (6) comprises a fixed clamp body (7) and a movable clamp body (8); a sleeve (9) is fixedly mounted on one end of the fixed clamp body (7); the fixed clamp body (7) and the movable clamp body (8) are movably connected via two connecting shafts (19); a second metal spring (23) is also movably mounted on the connecting shaft (19) located on one side of the fixed clamp body (7).

2. A thermocouple tester with conveniently replaceable clamping pliers according to claim 1, characterized in that: Two first positioning grooves (11) are provided on the outer side of the test lead (5); the first positioning grooves (11) are provided along the outer contour of the test lead (5) and are ring-shaped.

3. A thermocouple tester with conveniently replaceable clamping pliers according to claim 2, characterized in that: A plurality of arc-shaped expansion sheets (13) are fixedly connected between the two movable rings (10), the two movable rings (10) are respectively inserted and installed on the outside of the contact pins (12), and the contact pins (12) located on one side of the movable rings (10) are also provided with compression springs (14).

4. A thermocouple tester with conveniently replaceable clamping pliers according to claim 3, characterized in that: A fixing seat (17) is fixedly mounted on both sides of the movable clamp body (8), and a mounting groove (18) is provided in the fixing seat (17).

5. A thermocouple tester with conveniently replaceable clamping pliers according to claim 4, characterized in that: A plurality of limiting grooves (20) are formed on the outer side of the connecting shaft (19); the connecting shaft (19) is inserted into two through holes coaxially disposed on one side of the fixed caliper body (7) and the movable caliper body (8); a mounting ring (21) is fixedly mounted on one side of the second metal spring sheet (23); a plurality of limiting blocks (22) are fixedly mounted on the inner side of the mounting ring (21); the mounting ring (21) is inserted into the connecting shaft (19) located on one side of the fixed caliper body (7); and the limiting blocks (22) are clamped in the corresponding limiting grooves (20); and a side of the second metal spring sheet (23) away from the mounting ring (21) is inserted into the mounting groove (18) and fixed by screws.

6. The thermocouple tester with conveniently replaceable clamping pliers according to claim 3, characterized in that: A plurality of first metal springs (15) are fixedly mounted on the inner side of the sleeve (9), a protrusion (16) is fixedly mounted on one side of the first metal spring (15), a second positioning groove (24) is also provided in the sleeve (9) located on one side of the first metal spring (15), the sleeve (9) is inserted and mounted on the outer side of the detector body (1), the protrusion (16) on one side of the first metal spring (15) is clamped in the corresponding first positioning groove (11), and the second positioning groove (24) can be clamped on the outer side of a plurality of arc-shaped expansion sheets (13).

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