Resistance testing device

Abstract

The utility model discloses a resistance testing device, which relates to the technical field of testing devices and at least comprises a base, an index plate and a turntable, the index plate is fixed on the base, the turntable is coaxially fixed on a rotating seat of the index plate, a plurality of part positioning seats are arranged on the edge of the upper side of the turntable, and the part positioning seats are arranged on the base. Each part positioning seat comprises a base and a lifting seat, the lifting seat is positioned above the base, and a plurality of pressure springs are arranged between the lifting seat and the base; the base is further provided with a testing mechanism, the testing mechanism comprises a lower pressing block suspended above the rotating disc, a pressing air cylinder used for driving the lower pressing block to ascend and descend and two movable probes, and the tail portions of the two probes are electrically connected with an external resistance tester. The utility model provides a resistance testing device which is high in testing efficiency and automation degree in order to solve the problems of low efficiency and high labor cost of resistance testing of an existing electric smelting pipe fitting.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, in particular to a resistance testing device. Background Art

[0002] Electric fusion pipe fittings are pipe fittings that are melted by the temperature generated by electric current to achieve the connection between pipes, usually made of polyethylene. Its structure is as follows: a spiral heating wire is embedded in the inner wall of the electric fusion pipe fitting, and both ends of the heating wire are connected to a terminal, and the other end of the terminal extends to the outside of the electric fusion pipe fitting body. A wiring sleeve is coaxially arranged on the outside of each terminal, and the wiring sleeve and the electric fusion pipe fitting body are integrally injection molded.

[0003] Before leaving the factory, electric fusion pipe fittings need to be tested for resistance to prevent poor connection between the heating wire and the terminal, or quality problems with the heating wire and the terminal themselves. The existing resistance measurement method is manual detection, where operators manually clamp the terminal on the electric fusion pipe fitting with a resistance tester and test the electric fusion pipe fittings one by one. This testing method is inefficient and has high labor costs. Utility Model Content

[0004] In order to solve the problems of low test efficiency and high labor cost of the existing electric fusion pipe resistance test, the utility model provides a resistance test device with high test efficiency and high automation.

[0005] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0006] A resistance testing device comprises at least a base, a dividing plate and a rotating plate, wherein the dividing plate is fixed on the base, and the rotating plate is coaxially fixed on a rotating seat of the dividing plate.

[0007] A plurality of part positioning seats are arranged at the upper edge of the turntable, and the plurality of part positioning seats are distributed at equal intervals along the circumference of the turntable.

[0008] Each part positioning seat includes a base and a lifting seat, wherein the lifting seat is located above the base, and a plurality of compression springs are arranged between the lifting seat and the base;

[0009] A positioning groove for an electric fusion pipe fitting is provided on the top of the lifting seat. The positioning groove is in a transverse semi-cylindrical shape, and the central axis of the positioning groove intersects with the central axis of the turntable. The positioning groove is open at one end facing the outer side of the turntable, and a support plate is provided at one end facing the center of the turntable. A limiting groove for an electric fusion pipe fitting wiring sleeve is provided at the bottom of the positioning groove along the length direction of the positioning groove. The limiting groove is open at one end away from the center of the turntable, and the width of the limiting groove matches the outer diameter of the electric fusion pipe fitting wiring sleeve.

[0010] The base is provided with two plug-in mechanisms for the terminal posts of the electric fusion pipe fittings, and the two plug-in mechanisms correspond to the two terminal posts of the electric fusion pipe fittings one by one. Each plug-in mechanism includes a plug for plugging with the terminal post of the electric fusion pipe fitting and two limit blocks for guiding the terminal sleeve of the electric fusion pipe fitting. When the lifting seat moves downward, the two plug-in mechanisms are both located in the limit grooves on the lifting seat, and the two limit blocks of each plug-in mechanism are respectively located at the front and rear sides of the corresponding plug; the outer side wall of the base is provided with two metal electrode sheets, and the two metal electrode sheets are respectively electrically connected to the plugs of the two plug-in mechanisms;

[0011] The base is also provided with a testing mechanism, which includes a pressing block suspended above the turntable, a clamping cylinder for driving the pressing block to rise and fall, and two movable probes, the tails of the two probes being electrically connected to an external resistance tester.

[0012] Preferably, the two probes are positioned on a probe positioning block, and the front end of the probe positioning block is provided with two probe guide holes, and the two probe guide holes correspond to the two probes one by one, and the tail of each probe guide hole is coaxially connected with a limit section guide hole, and the tail of each probe is provided with a limit section, and the diameter of the limit section is larger than the aperture of the probe guide hole, and the probe passes through the corresponding probe guide hole, and the limit section at the tail of the probe is located in the limit section guide hole, and a return spring is provided between the rear end of the limit section and the rear end of the limit section guide hole, and the probe positioning block is provided with a connecting hole for the wire to pass through and connect with the probe, and the front end of the probe positioning block is arranged toward the turntable, and the rear end of the probe positioning block is provided with a test cylinder that can drive the probe positioning block to move forward and backward.

[0013] Preferably, the bottom of the lower pressing block is provided with an arc-shaped concave surface matching the side wall of the electric fusion pipe fitting.

[0014] Preferably, the testing mechanism also includes a guiding mechanism for the lower pressure block, and the specific structure is: a transverse plate is provided above the turntable, the transverse plate is fixed relatively to the base, the clamping cylinder is inverted and fixed on the top of the transverse plate, the piston rod of the clamping cylinder passes through the transverse plate and is connected to the lower pressure block located below the transverse plate, two optical axes are vertically fixed on the top of the lower pressure block, two corresponding optical axis sliders are penetrated on the transverse plate, and the optical axes are arranged through the corresponding optical axis sliders.

[0015] Preferably, a guide mechanism is provided between the lifting seat and the base, and the guide mechanism includes four guide columns, which are vertically distributed at the four corners of the top surface of the base, and four guide column sliding holes are correspondingly provided at the bottom of the lifting seat, and the four guide columns correspond to the four guide column sliding holes one by one and slide in cooperation with each other.

[0016] Preferably, the number of the compression springs is four, the four compression springs correspond to the four guide pillars one by one, and the compression springs are sleeved on the corresponding guide pillars.

[0017] Preferably, the two limit blocks of the same plug-in mechanism are provided with arc-shaped surfaces matching the outer wall of the electric fusion pipe wiring sleeve on the relative inner sides, and the top of the arc-shaped surface is provided with a chamfer to facilitate the insertion of the electric fusion pipe wiring sleeve.

[0018] Therefore, the utility model has the following beneficial effects: 1. It can automatically switch the electric fusion pipe fittings to be tested, and can automatically align and plug the terminal posts and test resistors of the electric fusion pipe fittings, effectively improving the test efficiency; 2. Compared with the labor cost, the device cost is not high, which can effectively reduce the cost of the enterprise and has a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is an exploded view of the part positioning seat in the utility model.

[0021] Figure 3 It is a structural schematic diagram of the base in the utility model.

[0022] Figure 4 It is a structural schematic diagram of the testing mechanism in the utility model.

[0023] Figure 5 It is a structural schematic diagram of the probe and the probe positioning block in the utility model.

[0024] Figure 6 It is a cross-sectional view of the probe and the probe positioning block in the utility model.

[0025] Figure 7 It is a structural schematic diagram of the electric fusion pipe fitting in the utility model.

[0026] 1: base; 2: indexing plate; 3: turntable; 4: part positioning seat; 401: base; 402: lifting seat; 403: compression spring; 404: positioning groove; 405: back plate; 406: limiting groove; 407: plug; 408: limiting block; 409: metal electrode sheet; 410: guide column; 5: testing mechanism; 501: pressing block; 502: clamping cylinder; 503: probe; 504: probe positioning block; 505: probe guide hole; 506: limiting section guide hole; 507: limiting section; 508: return spring; 509: connecting hole; 510: testing cylinder; 511: horizontal plate; 512: optical axis; 513: optical axis slider; 6: electric fusion pipe fitting; 601: terminal; 602: terminal sleeve. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and specific implementation schemes.

[0028] A resistance testing device, see Figures 1 to 7 , at least comprises a base 1, a dividing plate 2 and a turntable 3, wherein the dividing plate 2 is fixed on the base 1, and the turntable 3 is coaxially fixed on the rotating seat of the dividing plate 2.

[0029] Six part positioning seats 4 are provided at the upper edge of the turntable 3 , and the six part positioning seats 4 are distributed at equal intervals along the circumference of the turntable 3 .

[0030] Each part positioning seat 4 includes a base 401 and a lifting seat 402. Figure 2 As shown, the lifting seat 402 is located above the base 401, and four compression springs 403 and a guide mechanism are arranged between the lifting seat 402 and the base 401. The guide mechanism includes four guide posts 410, which are vertically distributed at the four corners of the top surface of the base 401. The bottom of the lifting seat 402 is correspondingly provided with four guide post sliding holes, and the four guide posts 410 correspond to the four guide post sliding holes one by one and slide in cooperation. The four compression springs 403 correspond to the four guide posts 410 one by one, and the compression springs 403 are sleeved on the corresponding guide posts 410.

[0031] A positioning groove 404 for the electric fusion pipe fitting 6 is provided on the top of the lifting seat 402. The positioning groove 404 is in a horizontally placed semi-cylindrical shape, and the central axis of the positioning groove 404 intersects with the central axis of the turntable 3. The positioning groove 404 is open at one end toward the outside of the turntable 3, and a support plate 405 is provided at the end toward the center of the turntable 3. A limiting groove 406 for the electric fusion pipe fitting wiring sleeve 602 is provided at the bottom of the positioning groove 404 along the length direction of the positioning groove 404. The limiting groove 406 is open at one end away from the center of the turntable 3, and the width of the limiting groove 406 matches the outer diameter of the electric fusion pipe fitting wiring sleeve 602.

[0032] The base 401 is provided with a plug-in mechanism for two electric fusion pipe terminal posts 601, such as Figure 3 As shown, the two plug-in mechanisms correspond one-to-one to the two terminals 601 of the electric fusion pipe fitting 6, and each plug-in mechanism includes a plug 407 for plugging with the terminal 601 of the electric fusion pipe fitting and two limit blocks 408 for guiding the terminal sleeve 602 of the electric fusion pipe fitting. When the lifting seat 402 moves downward, the two plug-in mechanisms are both located in the limit groove 406 on the lifting seat 402, and the two limit blocks 408 of each plug-in mechanism are respectively located on the front and rear sides of the corresponding plug 407. At the same time, the two limit blocks 408 of the same plug-in mechanism are provided with an arc surface matching the outer wall of the terminal sleeve 602 of the electric fusion pipe fitting on the relative inner sides, and the top of the arc surface is provided with a chamfer for facilitating the insertion of the terminal sleeve 602 of the electric fusion pipe fitting; two metal electrode sheets 409 are provided on the outer side wall of the base 401, and the two metal electrode sheets 409 are respectively electrically connected to the plugs 407 of the two plug-in mechanisms.

[0033] The base 1 is also provided with a testing mechanism 5, such as Figure 4 As shown, the testing mechanism 5 includes a pressing block 501 suspended above the turntable 3, a pressing cylinder 502 for driving the pressing block 501 to rise and fall, and two movable probes 503, the tails of the two probes 503 are electrically connected to an external resistance tester.

[0034] The bottom of the lower pressing block 501 is provided with an arc-shaped concave surface matching the side wall of the electric fusion pipe 6 .

[0035] The testing mechanism 5 also includes a guiding mechanism for the lower pressing block 501, and its specific structure is as follows: a transverse plate 511 is provided above the turntable 3, and the transverse plate 511 is relatively fixed to the base 1, and the clamping cylinder 502 is inverted and fixed on the top of the transverse plate 511, and the piston rod of the clamping cylinder 502 passes through the transverse plate 511 and is connected to the lower pressing block 501 located below the transverse plate 511, and two optical axes 512 are vertically fixed on the top of the lower pressing block 501, and the two optical axes 512 are respectively located on both sides of the piston rod of the clamping cylinder 502, and two corresponding optical axis sliders 513 are penetrated on the transverse plate 511, and the optical axis 512 is set through the corresponding optical axis slider 513.

[0036] The two probes 503 are positioned on a probe positioning block 504, such as Figure 5 , Figure 6 As shown, the front end of the probe positioning block 504 is provided with two probe guide holes 505, and the two probe guide holes 505 correspond to the two probes 503 one by one. The tail of each probe guide hole 505 is coaxially connected with a limit section guide hole 506, and the tail of each probe 503 is provided with a limit section 507, and the diameter of the limit section 507 is larger than the aperture of the probe guide hole 505. The probe 503 passes through the corresponding probe guide hole 505, and the limit section 507 at the tail of the probe 503 is located in the limit section guide hole 506. A return spring 508 is provided between the rear end of the limit section 507 and the rear end of the limit section guide hole 506. The probe positioning block 504 is provided with a connecting hole 509 for the wire to pass through and connect with the probe 503. The front end of the probe positioning block 504 is arranged toward the turntable 3, and the rear end of the probe positioning block 504 is provided with a test cylinder 510 that can drive the probe positioning block 504 to move forward and backward.

[0037] During the test, the indexing plate 2 is started, and the indexing plate 2 drives the turntable 3 to rotate step by step, and the part positioning seats 4 on the turntable 3 rotate one by one to below the lower pressing block 501 of the testing mechanism 5.

[0038] On the part positioning seat 4 before entering the testing mechanism 5, the electric fusion pipe fitting 6 to be tested can be pushed into the positioning groove 404 at the top of the lifting seat 402 by a vibration plate mechanism or other automatic arrangement mechanism, or the electric fusion pipe fitting 6 to be tested can be manually placed in the positioning groove 404 at the top of the lifting seat 402, with one end of the electric fusion pipe fitting 6 abutting against the support plate 405, and the wiring sleeve 602 of the electric fusion pipe fitting 6 facing downward and being clamped in the limiting groove 406 at the bottom of the positioning groove 404. The limiting groove 406 is used to ensure that the wiring sleeve 602 of the electric fusion pipe fitting 6 is always in a downward direction before testing.

[0039] When the part positioning seat 4 carrying the electric fusion pipe fitting 6 rotates to the bottom of the lower pressing block 501 of the testing mechanism 5, the pressing cylinder 502 is started, and the pressing cylinder 502 drives the lower pressing block 501 to move downward. During the downward movement of the lower pressing block 501, the arc-shaped concave surface at the bottom of the lower pressing block 501 first fits with the top of the electric fusion pipe fitting 6, and then pushes the electric fusion pipe fitting 6 and the corresponding lifting seat 402 to move downward together, and the compression spring 403 between the lifting seat 402 and the base 401 is compressed. During the downward movement of the electric fusion pipe fitting 6, the two wiring sleeves 602 of the electric fusion pipe fitting 6 first enter the two corresponding limit blocks 408 respectively, and the position of the terminal 601 inside the wiring sleeve 602 is ensured to be accurate through the guidance of the limit blocks 408. Subsequently, the terminal 601 inside the wiring sleeve 602 is inserted into the corresponding plug 407 to achieve electrical connection. Since the two metal electrode sheets 409 on the outer wall of the base 401 are electrically connected to the plugs 407 of the two plug-in mechanisms, the two metal electrode sheets 409 are also electrically connected to the two terminals 601 of the electric fusion pipe fitting 6. Then, the test cylinder 510 is started, and the test cylinder 510 pushes the probe positioning block 504 and the probe 503 to move forward, and the two probes 503 are respectively against and connected with the two metal electrode sheets 409. At this time, the resistance in the electric fusion pipe fitting 6 can be measured by the external resistance tester connected to the other ends of the two probes 503. In addition, the rear ends of the probes 503 in the probe positioning block 504 are provided with a return spring 508 as a tolerance mechanism. When the two probes 503 are not smoothly connected to the two metal electrode sheets 409, the return spring 508 can be compressed to ensure that the connection between the two probes 503 and the two metal electrode sheets 409 is stable.

[0040] After the test is completed, the test cylinder 510 retracts first, pulling the probe positioning block 504 and the probe 503 backward. Secondly, the pressing cylinder 502 retracts, pulling the pressing block 501 upward, and the electric fusion pipe 6 and the corresponding lifting seat 402 also move upward under the action of the compression spring 403. Finally, the terminal 601 of the electric fusion pipe 6 is separated from the corresponding plug 407, and the terminal sleeve 602 of the electric fusion pipe 6 is also moved out of the corresponding limit block 408, completing the resistance test of one electric fusion pipe 6.

[0041] Then, the indexing plate 2 drives the rotating plate 3 to rotate, and the next part positioning seat 4 carrying the electric fusion pipe 6 is rotated to the bottom of the lower pressing block 501 of the testing mechanism 5 for testing, and this process is repeated.

Claims

1. A resistance testing device, comprising at least a base (1), a dividing plate (2) and a rotating plate (3), wherein the dividing plate (2) is fixed on the base (1), and the rotating plate (3) is coaxially fixed on a rotating seat of the dividing plate (2), characterized in that: A plurality of part positioning seats (4) are provided at the upper edge of the turntable (3), and the plurality of part positioning seats (4) are distributed at equal intervals along the circumference of the turntable (3). Each part positioning seat (4) comprises a base (401) and a lifting seat (402), wherein the lifting seat (402) is located above the base (401), and a plurality of compression springs (403) are provided between the lifting seat (402) and the base (401); A positioning groove (404) for an electric fusion pipe fitting (6) is provided on the top of the lifting seat (402), the positioning groove (404) is in a transverse semi-cylindrical shape, and the central axis of the positioning groove (404) intersects with the central axis of the turntable (3), the positioning groove (404) is open at one end facing the outside of the turntable (3), and a support plate (405) is provided at the end facing the center of the turntable (3), and a limiting groove (406) for an electric fusion pipe fitting wiring sleeve (602) is provided at the bottom of the positioning groove (404) along the length direction of the positioning groove (404), the limiting groove (406) is open at one end away from the center of the turntable (3), and the width of the limiting groove (406) matches the outer diameter of the electric fusion pipe fitting wiring sleeve (602); The base (401) is provided with plug-in mechanisms for two electric fusion pipe terminal posts (601), the two plug-in mechanisms correspond to the two terminal posts (601) of the electric fusion pipe (6) one by one, each plug-in mechanism comprises a plug (407) for plugging into the electric fusion pipe terminal post (601) and two limit blocks (408) for guiding the electric fusion pipe terminal sleeve (602), when the lifting seat (402) moves downward, the two plug-in mechanisms are both located in the limit grooves (406) on the lifting seat (402) and the two limit blocks (408) of each plug-in mechanism are respectively located at the front and rear sides of the corresponding plug (407); the outer wall of the base (401) is provided with two metal electrode sheets (409), the two metal electrode sheets (409) are respectively electrically connected to the plugs (407) of the two plug-in mechanisms; The base (1) is also provided with a testing mechanism (5), the testing mechanism (5) comprising a lower pressing block (501) suspended above the turntable (3), a pressing cylinder (502) for driving the lower pressing block (501) to rise and fall, and two movable probes (503), the tails of the two probes (503) being electrically connected to an external resistance tester.

2. A resistance testing device according to claim 1, characterized in that: The two probes (503) are positioned on a probe positioning block (504); the front end of the probe positioning block (504) is provided with two probe guide holes (505); the two probe guide holes (505) correspond to the two probes (503) one by one; the tail of each probe guide hole (505) is coaxially connected to a limit section guide hole (506); the tail of each probe (503) is provided with a limit section (507); the diameter of the limit section (507) is larger than the aperture of the probe guide hole (505); the probe (503) passes through the corresponding probe guide hole ( 505), a limiting section (507) at the tail of the probe (503) is located in the limiting section guide hole (506), a return spring (508) is provided between the rear end of the limiting section (507) and the rear end of the limiting section guide hole (506), the probe positioning block (504) is provided with a connecting hole (509) for passing an electric wire to connect with the probe (503), the front end of the probe positioning block (504) is arranged toward the rotating disk (3), and the rear end of the probe positioning block (504) is provided with a test cylinder (510) capable of driving the probe positioning block (504) to move forward and backward.

3. A resistance testing device according to claim 1 or 2, characterized in that: The bottom of the lower pressing block (501) is provided with an arc-shaped concave surface matching the side wall of the electric fusion pipe (6).

4. A resistance testing device according to claim 3, characterized in that: The testing mechanism (5) further comprises a guiding mechanism for the lower pressing block (501), and the specific structure is as follows: a transverse plate (511) is provided above the turntable (3), the transverse plate (511) is fixed relative to the base (1), the clamping cylinder (502) is fixed inverted on the top of the transverse plate (511), the piston rod of the clamping cylinder (502) passes through the transverse plate (511) and is connected to the lower pressing block (501) located below the transverse plate (511), two optical axes (512) are vertically fixed on the top of the lower pressing block (501), two corresponding optical axis sliders (513) are penetrated on the transverse plate (511), and the optical axes (512) are arranged through the corresponding optical axis sliders (513).

5. A resistance testing device according to claim 1, characterized in that: A guide mechanism is provided between the lifting seat (402) and the base (401), and the guide mechanism comprises four guide posts (410). The four guide posts (410) are vertically distributed at four corners of the top surface of the base (401), and four guide post sliding holes are correspondingly provided at the bottom of the lifting seat (402). The four guide posts (410) correspond to the four guide post sliding holes one by one and are slidably matched.

6. A resistance testing device according to claim 5, characterized in that: The number of the compression springs (403) is four, and the four compression springs (403) correspond to the four guide pillars (410) one by one, and the compression springs (403) are sleeved on the corresponding guide pillars (410).

7. A resistance testing device according to claim 1, characterized in that: The two limiting blocks (408) of the same plug-in mechanism are provided with arc-shaped surfaces matching the outer wall of the electric fusion pipe wiring sleeve (602) on the opposite inner sides, and the top of the arc-shaped surface is provided with a chamfer to facilitate the insertion of the electric fusion pipe wiring sleeve (602).

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