Casing prototype for compressor compatibility test

Abstract

The invention discloses a casing pipe prototype for compressor compatibility testing, which comprises an electric control device, a driving mechanism, a supporting seat, a pressing rod, a U-shaped groove and a pair of baffle plates, the U-shaped groove is transversely arranged on the inner bottom surface of the supporting seat, a plurality of track grooves are arranged on two groove walls of the U-shaped groove, a plurality of clamping grooves are arranged on two side walls of the supporting seat, and the clamping grooves are arranged in the clamping grooves. The pressing rod can ascend and descend and is arranged in the supporting base in the transverse direction, the pressing rod is a metal core rod with the diameter not larger than 10 mm and located over the U-shaped groove, the two ends of the baffles are fixed to the two ends of the supporting base, each baffle is located above the groove wall of one side of the U-shaped groove, and a gap is formed between the baffle and the U-shaped groove. The electric control device controls the driving mechanism to drive the pressing rod to move downwards so as to press the casing pipe downwards, and the casing pipe is bent by 180 degrees to be formed. The sleeve bending operation process is automated, the sample preparation efficiency is improved, prepared samples have good consistency, the precision requirement is met, and test result errors caused by sample preparation errors are reduced.

Description

Technical Field

[0001] The invention relates to a sleeve pipe prototype for compressor compatibility testing. Background Art

[0002] The bushing is a tubular insulating material in the compressor, mainly used to provide electrical protection for the compressor motor lead wire and its connection points at both ends. It is usually made of polyester film, polyester yarn and other materials. The motor lead wire extends from the inside of the motor enameled coil and is connected to the terminal for conducting the terminal and the motor. The bushing is wrapped around the exposed motor lead wire to provide insulation protection, prevent short circuits and other faults, and ensure electrical safety inside the compressor housing.

[0003] According to the Appendix CC clause in the compressor safety standard IEC 60335-2-34:2021, insulating materials in compressors such as bushings need to undergo compatibility testing to verify safety performance in actual working scenarios. Before the test, a copper conductor with a diameter approximately equal to the inner diameter of the bushing is required to be inserted into the bushing. The bushing and copper conductor are bent 180° around a core rod with a diameter not exceeding 10 mm, and then inserted into the designated instrument for electrical strength testing. In this industry, the preparation of this sample is currently mostly done manually by bending it, which has the following defects: low efficiency, high labor costs, and the quality of samples made by different operators is uneven and difficult to unify, which may affect the test results. Summary of the invention

[0004] The object of the present invention is to provide a sleeve tube prototype for compressor compatibility testing which has a simple structure, low cost, simple operation, ensures good sample consistency, meets accuracy requirements, and improves sample preparation efficiency.

[0005] The object of the present invention is achieved through the following technical measures: a sleeve pipe prototype for compressor compatibility test, characterized in that it includes an electronic control device, a driving mechanism, a groove-shaped support seat, a pressure rod, a U-shaped groove adapted to the pressure rod, and a pair of baffles for respectively pressing the two sides of the sleeve during the downward pressing process of the pressure rod, wherein the U-shaped groove is arranged transversely on the inner bottom surface of the support seat, a plurality of track grooves are arranged on the two groove walls of the U-shaped groove, and a plurality of clamping grooves are arranged on the two side walls of the support seat, respectively, and the clamping grooves and the track grooves are used one by one to position a plurality of sleeves with copper conductors therein, the pressure rod can be lifted and lowered and arranged transversely in the support seat, the pressure rod is a metal core rod with a diameter not exceeding 10 mm and is located directly above the U-shaped groove, the two ends of the baffle are fixed on the two ends of the support seat, and each baffle is located above the groove wall on one side of the U-shaped groove and a gap is formed between the two, the electronic control device controls the driving mechanism to drive the pressure rod to move downward and press the sleeve at the notch of the U-shaped groove to bend it 180° to form.

[0006] The present invention automates the operation process of bending the casing, which reduces labor costs compared to the traditional manual sample preparation method, and can prepare multiple samples at one time. The obtained samples can all meet the requirements for samples in the Appendix CC clause of the compressor safety standard IEC 60335-2-34:2021, thereby improving the sample preparation efficiency, realizing rapid and automated sample preparation, and the prepared samples have good consistency, meet the accuracy requirements, and reduce the test result errors caused by sample preparation errors.

[0007] The driving mechanism described in the present invention includes a pair of servo motors respectively arranged at both ends of the support seat, a pair of screw rods arranged along the longitudinal direction and two pairs of support arms arranged along the vertical direction. The servo motor is located on one side of the support seat, one end of the screw rod is connected to the power output shaft of the servo motor, and the other end can be rotatably installed in the frame groove of the inner wall on the other side of the support seat, the upper ends of the two pairs of support arms are respectively engaged with the two screw rods, and the lower ends are respectively hinged at the two ends of the pressure rod.

[0008] The present invention has pins installed at both ends of the pressure rod, the lower ends of each pair of support arms are hinged on a pin, and guide grooves extending vertically are provided on both end surfaces of the support seat, and the pins can be slidably installed in the guide grooves.

[0009] The electric control device of the present invention includes a controller, an upper position sensor for sensing the pressure rod being lifted to the upper limit position, and a lower position sensor for sensing the pressure rod being lowered to the lower limit position. The upper position sensor is arranged on the upper part of the inner wall of the U-shaped groove, and the lower position sensor is arranged on the bottom part of the inner wall of the U-shaped groove. The controller is respectively connected to the upper position sensor, the lower position sensor and the servo motor.

[0010] The present invention provides a pair of elongated through holes extending vertically on the front end face of the support seat, and the sleeve tube prototype includes a push rod and a lifting rod, both of which are U-shaped rods. The lifting rod is located above the push rod and the U-shaped parts of the two are connected by a spring, and a pair of rod bodies of the push rod and the lifting rod pass through the through holes and extend into the support seat, wherein the pair of rod bodies of the lifting rod are retractable and the ends of the rod bodies are hinged on the outer walls on both sides of the U-shaped groove, and the pair of rod bodies of the push rod are placed on the front ends of the top edges of the two side walls of the U-shaped groove, and a sample collecting hole communicating with the outside is provided at the bottom of the rear end face of the support seat, and the push rod pushes the formed sample lifted by the lifting rod out of the U-shaped groove so that it falls from the sample collecting hole for collection.

[0011] The width of the U-shaped groove of the present invention is 16-18 mm.

[0012] The groove wall on one side of the U-shaped groove of the present invention is located directly below the corresponding baffle plate, and the gap is 11±0.5 mm.

[0013] Compared with the prior art, the present invention has the following significant effects:

[0014] (1) The present invention automates the operation process of bending the casing, which reduces the labor cost compared with the traditional manual sample preparation method, and can prepare multiple samples at one time. The obtained samples can meet the requirements for samples in the Appendix CC clause of the compressor safety standard IEC 60335-2-34:2021, thereby improving the sample preparation efficiency, realizing rapid and automated sample preparation, and the prepared samples have good consistency, meet the accuracy requirements, and reduce the test result errors caused by sample preparation errors.

[0015] (2) The present invention adopts a transmission structure of a motor, a screw rod and a support arm to control the up and down movement of the pressure rod, and controls the direction of the motor through a sensor and a built-in electronic circuit to realize the automation of the bending of the casing sample.

[0016] ⑶ The U-shaped groove and the upper and lower position sensors of the present invention can ensure that the bending degree of each sample during the downward pressing process of the pressure rod meets the requirements of the standard, and there is good consistency between the samples. During the test, the influence of sample differences on the test results can be reduced, thereby improving the reliability of the test results.

[0017] (4) The present invention uses a push rod to push out the sample and collects it uniformly from the bottom of the equipment, thereby improving the collection efficiency and avoiding the risk of the operator being crushed when obtaining the sample.

[0018] (5) The present invention has a simple structure, low cost, strong practicability, and is suitable for wide promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 The utility model is a schematic diagram of the assembly structure of the U-shaped groove, the baffle plate, the push rod and the lifting rod of the present invention.

[0022] In the figure: 1-card slot, 2-track slot, 3-U-shaped slot, 4-pressure rod, 5-pin shaft, 6-screw rod, 7-support arm, 8-nut, 9-frame slot, 10-servo motor, 11-guide slot, 12-through hole, 13-lifting rod, 14-push rod, 15-sample collecting hole, 16-upper position sensor, 17-lower position sensor, 18-control button, 19-spring, 20-support seat, 21-support foot, 22-baffle, 23-gap, 24-hinge point. DETAILED DESCRIPTION

[0023] The present invention is further illustrated below through the description of specific implementation methods, but this is not a limitation of the present invention. Those skilled in the art can make various modifications or improvements based on the basic idea of ​​the present invention, but as long as they do not deviate from the basic idea of ​​the present invention, they are all within the protection scope of the present invention.

[0024] like Figure 1 and Figure 2 As shown, a sleeve pipe prototype for compressor compatibility test of the present invention includes an electric control device, a driving mechanism, a groove-shaped support seat 20, a pressure rod 4, a U-shaped groove 3 adapted to the pressure rod 4, and a pair of baffles 22 for respectively pressing the two sides of the sleeve during the downward pressing process of the pressure rod 4. The support seat 20 is a rectangular body, and a support foot 21 is provided on the bottom surface of the support seat 20. The U-shaped groove 3 is arranged on the inner bottom surface of the support seat 20 in the horizontal direction (X direction). The U-shaped groove 3 is used to shape the shape of the sleeve and the internal copper conductor after bending 180°. Six track grooves 2 are respectively arranged on the two groove walls of the U-shaped groove 3, and six clamping grooves 1 are respectively arranged on the two side walls of the support seat 20. The clamping grooves 1 correspond to the track grooves 2 one by one. The clamping grooves 1 and the track grooves 2 jointly fix the sleeve and the internal copper conductor to prevent displacement during the bending operation. The pressure rod 4 can be raised and lowered and is arranged in the support seat 20 in the horizontal direction. The pressure rod 4 is a metal core rod with a diameter not exceeding 10 mm and is located directly above the U-shaped groove 3. The width of the U-shaped groove 3 is 1.6-18 mm, the two ends of the baffle 22 are fixed on the two ends of the support seat 20, and each baffle 22 is located directly above the groove wall on one side of the U-shaped groove 3 and a gap 23 is formed between the two, and the gap 23 is 11±0.5 mm. The electric control device controls the driving mechanism to drive the pressure rod 4 to move downward and press the part of the sleeve located at the notch of the U-shaped groove to bend it 180° to form.

[0025] In this embodiment, the driving mechanism includes a pair of servo motors 10 respectively arranged at both ends of the support seat 20, a pair of screw rods 6 arranged along the longitudinal direction (Y direction) and two pairs of support arms 7 arranged along the vertical direction (Z direction). The servo motor 10 is located on one side of the support seat 20. One end of the screw rod 6 is connected to the power output shaft of the servo motor 10, and the other end can be rotated and installed in the frame groove 9 on the inner wall of the other side of the support seat 20. The frame groove 9 allows the screw rod 6 to rotate under the action of the servo motor 10 but does not cause position displacement. Each pair of support arms 7 is composed of a pair of hard materials on the left and right. The upper ends of the two pairs of support arms 7 are respectively threadedly matched with the two screw rods 6 through nuts 8, and the lower ends are respectively hinged on the pins 5 at the two ends of the pressure rod 4. Guide grooves 11 extending vertically are provided on the two end surfaces of the support seat 20, and the pins 5 can be slidably installed in the guide grooves 11.

[0026] A pair of elongated through holes 12 extending vertically are provided on the front end face of the support seat 20. The sleeve tube prototype includes a push rod 14 and a lifting rod 13, both of which are U-shaped rods. The push rod 14 is located above the lifting rod 13 and the U-shaped parts of the two are connected by a spring 19. A pair of rod bodies of the push rod 14 and the lifting rod 13 pass through the through hole 12 and extend into the support seat 20, wherein the pair of rod bodies of the lifting rod 13 are retractable (sleeve type) and the ends of the rod bodies are hinged (hinge point 24) on the outer walls of both sides of the U-shaped groove 3, a pair of rod bodies of the push rod 14 are placed on the front ends of the top edges of the two side walls of the U-shaped groove and are located in the gap 23, and a sample collecting hole 15 communicated with the outside is provided at the bottom of the rear end face of the support seat 20, the push rod 14 pushes the completed sample lifted by the lifting rod 13 out of the U-shaped groove 3 and allows the sample to fall from the sample collecting hole 15 for collection.

[0027] The electronic control device includes a controller, an upper position sensor 16 for sensing the pressure rod 4 being lifted to the upper limit position, and a lower position sensor 17 for sensing the pressure rod 4 being lowered to the lower limit position. The upper position sensor 16 is arranged on the upper part of the inner wall of the U-shaped groove 3, and the lower position sensor 17 is arranged on the bottom part of the inner wall of the U-shaped groove 3. The controller is respectively connected to the upper position sensor 16, the lower position sensor 17 and the servo motor 10.

[0028] The working process of the present invention is as follows:

[0029] The sample to be bent is precisely inserted into the predetermined position between the card slot 1 and the track slot 2 of the sample making machine to ensure accurate positioning and clamping of the sample. Press the control button 18 on the controller (which can control the start, stop, reset, forward and reverse rotation of the servo motor 10) to control the servo motors 10 on both sides of the sample making machine to start, and the servo motor 10 drives the screw 6 to rotate, and the screw 6 drives the nut 8 to move relative to the axis of the screw 6. The support arm 7 connected to the nut 8 presses down the pin 5 and the pressure rod 4 connected to it. Under the action of the guide groove 11, the two ends of the pressure rod 4 move downward synchronously. The downward movement of the pressure rod 4 presses the sample in the sample making machine into a 180° shape in the U-shaped groove. The pair of baffles 22 press the two sides of the sample respectively during the downward pressing process of the pressure rod 4 to prevent the sample from tilting. When the pressure rod 4 moves to the predetermined position detected by the lower position sensor 17, the servo motor 10 will perform a reverse action, driving the pressure rod 4 to lift upward, and the lifting action will continue until the pressure rod 4 reaches the predetermined position detected by the upper position sensor 16, at which time the pressure rod 4 stops moving, completing the operation of bending the sample. Subsequently, the U-shaped portion of the lifting rod 13 is lifted from the outside of the box of the sample preparation machine, and the rod body of the lifting rod 13 lifts the bent sleeve and copper conductor out of the track groove 2 of the U-shaped groove 3, pushing the push rod 14 and the lifting rod 13, the lifting rod 13 retracts, and the push rod 14 pushes the sample to the sample collection hole 15 to achieve sample collection.

[0030] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A sleeve pipe prototype for compressor compatibility testing, characterized in that: The utility model comprises an electric control device, a driving mechanism, a groove-shaped support seat, a pressure rod, a U-shaped groove adapted to the pressure rod and a pair of baffles for respectively pressing the two sides of the sleeve when the pressure rod is pressed down. The U-shaped groove is arranged transversely on the inner bottom surface of the support seat, and a plurality of track grooves are arranged on the two groove walls of the U-shaped groove, and a plurality of clamping grooves are arranged on the two side walls of the support seat. The clamping grooves and the track grooves are used one by one to position a plurality of sleeves with copper conductors therein. The pressure rod can be lifted and lowered and is arranged transversely in the support seat. The pressure rod is a metal core rod with a diameter not exceeding 10 mm and is located directly above the U-shaped groove. The two ends of the baffle are fixed on the two ends of the support seat, and each baffle is located above the groove wall on one side of the U-shaped groove and a gap is formed between the two. The electric control device controls the driving mechanism to drive the pressure rod to move downward and press the sleeve at the notch of the U-shaped groove to bend it 180° to form.

2. The sleeve pipe prototype for compressor compatibility test according to claim 1, characterized in that: The driving mechanism includes a pair of servo motors respectively arranged at both ends of the support seat, a pair of screw rods arranged along the longitudinal direction and two pairs of support arms arranged along the vertical direction. The servo motor is located on one side of the support seat, one end of the screw rod is connected to the power output shaft of the servo motor, and the other end can be rotatably installed in the frame groove of the inner wall on the other side of the support seat. The upper ends of the two pairs of support arms are respectively engaged with the two screw rods, and the lower ends are respectively hinged to the two ends of the pressure rod.

3. The sleeve pipe prototype for compressor compatibility test according to claim 2, characterized in that: Pins are installed at both ends of the pressure rod, the lower ends of each pair of support arms are hinged on a pin, and guide grooves extending vertically are provided on both end surfaces of the support seat, and the pins can be slidably installed in the guide grooves.

4. The sleeve pipe prototype for compressor compatibility test according to claim 3, characterized in that: The electronic control device includes a controller, an upper position sensor for sensing the pressure rod being lifted to an upper limit position, and a lower position sensor for sensing the pressure rod being lowered to a lower limit position. The upper position sensor is arranged at the upper part of the inner wall of the U-shaped groove, and the lower position sensor is arranged at the bottom part of the inner wall of the U-shaped groove. The controller is respectively connected to the upper position sensor, the lower position sensor and the servo motor.

5. The sleeve pipe prototype for compressor compatibility test according to claim 4, characterized in that: A pair of elongated through holes extending vertically are provided on the front end face of the support seat, and the sleeve tube prototype includes a push rod and a lifting rod, both of which are U-shaped rods. The lifting rod is located above the push rod and the U-shaped parts of the two are connected by a spring, and a pair of rod bodies of the push rod and the lifting rod pass through the through holes and extend into the support seat, wherein the pair of rod bodies of the lifting rod are retractable and the ends of the rod bodies are hinged on the outer walls of both sides of the U-shaped groove, and the pair of rod bodies of the push rod are placed on the front ends of the top edges of the two side walls of the U-shaped groove, and a sample collecting hole communicating with the outside is provided at the bottom of the rear end face of the support seat, and the push rod pushes the formed sample lifted by the lifting rod out of the U-shaped groove so that it falls from the sample collecting hole for collection.

6. The sleeve pipe prototype for compressor compatibility test according to claim 5, characterized in that: The width of the U-shaped groove is 16-18 mm.

7. The sleeve pipe prototype for compressor compatibility test according to claim 6, characterized in that: One side wall of the U-shaped groove is located directly below the corresponding baffle, and the gap is 11±0.5 mm.

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