A manual and electric dual-purpose test variable pressure regulator

Abstract

A manual and electric dual-purpose test variable voltage regulator, including the voltage regulator box, the fixed plate is arranged in the voltage regulator box, the fixed plate divides the voltage regulator box into upper cavity and lower cavity, the self-coupling variable winding is arranged in the upper cavity, and the lead screw is assembled, the motor is installed in the lower cavity, the motor output shaft is connected with the lead screw through the gear transmission mechanism, the nut is assembled on the lead screw, the insulating block is fixedly connected on the nut, the first sliding contact is installed on the insulating block, the first sliding contact abuts on the self-coupling variable winding, the input voltage meter, the output current meter, the output voltage meter and the input current meter are installed on the voltage regulator box shell, and the upper and lower ends of the self-coupling variable winding are connected with the power supply through the first lead line respectively. The utility model is used to solve the problem that the existing voltage regulator electric device cannot be operated when being damaged.

Description

Technical Field

[0001] This utility model belongs to the field of power testing and relates to a test transformer that can be used both manually and electrically. Background Technology

[0002] In the field of power testing, voltage regulating devices for test transformers are indispensable equipment. Traditional voltage regulators are mainly divided into two types: manual and electric. Manual voltage regulators are relatively cumbersome to operate, requiring manual adjustment, and their adjustment accuracy is limited, especially when conducting high-precision tests, they are difficult to meet the requirements. While electric voltage regulators are convenient to operate and offer high adjustment accuracy, in actual use, if the electric device malfunctions, such as motor failure or control system failure, the entire voltage regulator will not function properly, causing the test to be unable to continue and causing great inconvenience to the testing work. In addition, electric voltage regulators cannot be used in certain special environments, such as when the power supply is unstable or there is no power. Therefore, existing voltage regulators have certain limitations in use and cannot meet diverse testing needs. Utility Model Content

[0003] The purpose of this utility model is to provide a test voltage regulator that can be used both manually and electrically to solve the problem that the voltage regulation operation cannot be performed when the electric device of the existing voltage regulator is damaged.

[0004] To solve the above problems, the technical solution of this utility model is as follows:

[0005] A test transformer voltage regulator that can be used both manually and electrically includes a voltage regulating box. A partition is fixedly installed inside the voltage regulating box, dividing it into an upper chamber and a lower chamber. An autotransformer winding and a lead screw are installed in the upper chamber. A motor is installed in the lower chamber, and the motor's output shaft is connected to the lead screw via a gear transmission mechanism. A nut is installed on the lead screw, and an insulating block is fixedly connected to the nut. A first sliding contact is installed on the insulating block, abutting against the autotransformer winding. An input voltmeter, an output ammeter, and an output voltmeter are installed on the outer shell of the voltage regulating box. The upper and lower ends of the autotransformer winding are respectively connected to a power source via first wires. The input voltmeter and input ammeter are connected to the first wires. The lower end of the autotransformer winding and the first sliding contact are respectively connected to the test sample via second wires. The output voltmeter and output ammeter are connected to the second wires.

[0006] Furthermore, a square insertion hole is provided at the upper end of the lead screw.

[0007] Furthermore, a sliding contact line is fixedly connected inside the upper cavity, a copper clip is installed on the insulating block, a first sliding contact is installed on the copper clip, a second sliding contact is assembled inside the sliding contact line, the second sliding contact is connected to the copper clip, and one end of the second conductor is connected to the sliding contact line.

[0008] Furthermore, a guide rail, a push-pull electromagnet, and a forward / reverse control module are installed in the lower cavity. A forward / reverse button is installed on the voltage regulating box. A slider is mounted on the guide rail. The motor is mounted on the slider. The pull rod in the push-pull electromagnet is connected to the slider. The forward / reverse button is connected to the input terminal of the forward / reverse control module. The motor is connected to the output terminal of the forward / reverse control module. The power supply is connected to the push-pull electromagnet and the forward / reverse control module.

[0009] Furthermore, the gear transmission mechanism is a reduction bevel gear transmission mechanism.

[0010] Furthermore, four terminals are installed in the voltage regulating box. The first and second wires are connected to the power supply and the test sample respectively through the terminals.

[0011] Furthermore, the insulating block is made of bakelite, and a guide sleeve is fixedly installed inside the bakelite. A guide rod is installed inside the guide sleeve and is fixedly connected to the upper cavity.

[0012] The beneficial effects of this utility model are as follows: First, the voltage regulator has both manual and electric voltage regulation modes. Under normal circumstances, electric voltage regulation can be used, which is simple to operate and has high adjustment accuracy, meeting the requirements of high-precision testing. When the electric device fails, it can be quickly switched to manual voltage regulation to ensure that the test is not affected, improving the reliability and continuity of the test. Second, by setting a partition to divide the voltage regulating box into upper and lower chambers, the autotransformer winding, lead screw, motor and other components are rationally arranged, making the structure compact, space utilization high, and easy to install and maintain. In addition, the use of a reduction bevel gear transmission mechanism can effectively reduce the motor speed, increase torque, and improve the stability and accuracy of voltage regulation. The insulation block is made of bakelite and has guide sleeves and guide rods set in it, which enhances the insulation performance and structural stability, ensuring the safe operation of the voltage regulator in high-voltage environments. Finally, by installing forward and reverse buttons and a forward and reverse control module on the voltage regulating box, the forward and reverse control of the motor is realized, further improving the flexibility and convenience of voltage regulation. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0015] Figure 2 for Figure 1 A cross-sectional view at point AA.

[0016] Figure 3 This is a schematic diagram illustrating the working principle of this utility model.

[0017] In the diagram: 1. Partition plate; 2. Voltage regulating box; 3. Insulating block; 4. Guide rod; 5. Lead screw; 6. Sliding contact line; 7. Copper clamp; 8. First sliding contact; 9. Autotransformer winding; 10. Terminal block; 11. Input voltmeter; 12. Output voltmeter; 13. Input ammeter; 14. Forward / reverse button; 15. Output ammeter; 16. Forward / reverse control module; 17. Push-pull electromagnet; 18. Motor; 19. Guide rail; 20. Gear transmission mechanism; 21. Second sliding contact; 22. Nut; 23. Wrench. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1 to 3 As shown, a test transformer voltage regulator that can be used both manually and electrically includes a voltage regulating box 2. A partition 1 is fixedly installed inside the voltage regulating box 2, dividing it into an upper chamber and a lower chamber. An autotransformer winding 9 and a lead screw 5 are installed in the upper chamber. The upper and lower ends of the lead screw 5 are connected to the inner wall of the voltage regulating box 2 via a bushing. A motor 18 is installed in the lower chamber. The output shaft of the motor 18 is connected to the lead screw 5 via a gear transmission mechanism 20, driving the lead screw 5 to rotate. A nut 22 is mounted on the lead screw 5, and an insulating block 3 is fixedly connected to the nut 22. A first sliding contact 8 is installed on the insulating block 3. Due to the first… An insulating block 3 separates the sliding contact 8 from the lead screw 5, so there is no electrical conductivity between the first sliding contact 8 and the lead screw 5. The first sliding contact 8 rests against the autotransformer winding 9. An input voltmeter 11, an output ammeter 15, an output voltmeter 12, and an input ammeter 13 are installed on the outer shell of the voltage regulating box. The upper and lower ends of the autotransformer winding 9 are respectively connected to the power supply through the first wire. The input voltmeter 11 and the input ammeter 13 are connected to the first wire. The lower end of the autotransformer winding 9 and the first sliding contact 8 are respectively connected to the test sample through the second wire. The output voltmeter 12 and the output ammeter 15 are connected to the second wire.

[0020] This invention achieves dual functions of electric and manual voltage regulation. The voltage regulating box 2 is divided into upper and lower chambers by a partition 1, and components such as the autotransformer winding 9, lead screw 5, and motor 18 are rationally arranged, resulting in a compact structure and high space utilization. Simultaneously, the motor 18 drives the lead screw 5 to rotate, causing the sliding contact to move on the autotransformer winding 9, thus regulating the output voltage. Furthermore, the inclusion of an input voltmeter 11, an output ammeter 15, an output voltmeter 12, and an input ammeter 13 allows for real-time monitoring of the voltage regulator's operating status, improving its reliability and operational safety.

[0021] Furthermore, a square insertion hole is provided at the upper end of the lead screw 5. This allows for the insertion of hand tools (such as wrenches) to enable manual pressure adjustment. This design allows the pressure regulator to quickly switch to manual mode in case of electric actuator failure or when manual adjustment is required, improving the reliability and flexibility of the pressure regulator and ensuring that the test is not affected by electric actuator failure.

[0022] Furthermore, a sliding contact line 6 is fixedly connected inside the upper cavity, and a copper clip 7 is installed on the insulating block 3. A first sliding contact 8 is installed on the copper clip 7, and a second sliding contact 21 is assembled inside the sliding contact line 6. The second sliding contact 21 is connected to the copper clip 7, and one end of the second conductor is connected to the sliding contact line 6. The second sliding contact 21 can move within the sliding contact line 6. This structure can prevent the connected second conductor from getting tangled due to the movement of the first sliding contact 8, providing a more stable path for the movement of the sliding contact and further improving the performance of the voltage regulator.

[0023] Furthermore, a guide rail 19, a push-pull electromagnet 17, and a forward / reverse control module 16 (model: ZFM-2524, input voltage: DC24V) are installed in the lower cavity. A forward / reverse button 14 is installed on the voltage regulating box 2. A slider is mounted on the guide rail 19, and a motor 18 is mounted on the slider. The pull rod of the push-pull electromagnet 17 is connected to the slider. The forward / reverse button 14 is connected to the input terminal of the forward / reverse control module 16, and the motor 18 is connected to the output terminal of the forward / reverse control module 16. The power supply is connected to the push-pull electromagnet 17 and the forward / reverse control module 16. When the power is off, the spring inside the push-pull electromagnet 17 will pull the motor 18 to move, separating it from the transmission mechanism, thus facilitating manual rotation of the lead screw 5. The forward and reverse rotation of the motor 18 can be controlled by pressing the forward / reverse button 14.

[0024] In addition, in order to increase the torque of motor 18 to lead screw 5 during implementation, a geared motor 18 will be selected. However, it is quite difficult to turn the output shaft of geared motor 18 by hand. Therefore, the above structure was designed. Its working principle is as follows: when the power is cut off, the spring inside the push-pull electromagnet 17 will pull the motor 18 to move, so that the motor 18 is separated from the transmission mechanism. In this way, when the lead screw 5 is rotated manually, it is not damped by the motor 18, making it easier and more convenient for the operator to rotate the lead screw 5, thus improving the operation convenience of the voltage regulator.

[0025] Furthermore, the gear transmission mechanism 20 is a reduction bevel gear transmission mechanism 20. This structure can firstly reduce speed and increase torque, and secondly, it can easily separate or engage the small bevel gear mounted on the output shaft of the motor 18 with the large bevel gear mounted on the lead screw 5.

[0026] Furthermore, four terminals 10 are installed in the voltage regulating box 2. The first and second wires are connected to the power supply and the test sample respectively through the terminals 10. The terminals 10 make the wiring connection more standardized and neat, facilitate installation, disassembly and maintenance, and enhance the stability of the wire connection, reduce problems such as loose wiring and poor contact, and ensure the normal operation of the voltage regulator.

[0027] Furthermore, the insulating block 3 is made of bakelite, and a guide sleeve is fixedly installed inside the bakelite. A guide rod 4 is installed inside the guide sleeve and fixedly connected to the upper cavity. The insulating block 3 is made of bakelite, which has excellent insulation properties, effectively preventing electrical conduction between the first sliding contact 8 and the lead screw 5, avoiding short circuits and other safety accidents, and ensuring the safety of operators and equipment. The guide sleeve and guide rod 4 are installed inside the bakelite, and the guide rod 4 is fixed in the upper cavity. The cooperation between the guide sleeve and guide rod 4 guides and stabilizes the movement of the insulating block 3, making the movement of the first sliding contact 8 on the autotransformer winding 9 more stable and precise, and improving the accuracy of voltage regulation.

[0028] The electric voltage regulation process of this utility model is as follows:

[0029] 1. Power connection and startup;

[0030] When the voltage regulator is powered on, it is in standby mode. The power supply is connected to the upper and lower ends of the autotransformer winding 9 through the first wire. At the same time, the input voltmeter 11 and the input ammeter 13 will display the current voltage and current of the power supply.

[0031] Press the forward / reverse button 14 on the voltage regulating box 2 to select the forward or reverse direction of the motor 18 according to the test requirements. The forward / reverse button 14 transmits the signal to the forward / reverse control module 16, which controls the forward and reverse rotation of the motor 18 according to the input signal.

[0032] 2. Motor 18 drives the rotation of lead screw 5;

[0033] The motor 18 starts operating under the control of the forward and reverse control module 16, and its output shaft is connected to the lead screw 5 through the gear transmission mechanism 20 (reduction bevel gear transmission mechanism 20). The rotational power of the motor 18 is transmitted to the lead screw 5 after being reduced and increased in torque by the reduction bevel gear transmission mechanism 20, causing the lead screw 5 to rotate.

[0034] 3. Adjustment of nut 22 movement and sliding contact;

[0035] When the lead screw 5 rotates, the nut 22 mounted on the lead screw 5 moves along the axial direction of the lead screw 5. The nut 22 is fixedly connected to the insulating block 3, on which the first sliding contact 8 is mounted. Therefore, the movement of the nut 22 will cause the insulating block 3 and the first sliding contact 8 to move along the axial direction of the autotransformer winding 9.

[0036] The first sliding contact 8 rests against the autotransformer winding 9. As the first sliding contact 8 moves, its contact position on the autotransformer winding 9 changes, thereby changing the output voltage of the autotransformer winding 9. The output voltmeter 12 and the output ammeter 15 display the current output voltage and current in real time.

[0037] 4. Sample connection and testing;

[0038] The lower end of the autotransformer winding 9 and the first sliding contact 8 are respectively connected to the test specimen via the second wire. When the first sliding contact 8 moves to the appropriate position and the output voltage reaches the test requirements, the test specimen begins to be tested.

[0039] (II) Manual pressure adjustment process:

[0040] 1. Switch to manual mode;

[0041] When the electric actuator malfunctions or requires manual adjustment, switch the voltage regulator to manual mode. At this time, a hand tool (such as a wrench) can be inserted into the square socket at the upper end of the lead screw 5.

[0042] 2. Manually rotate lead screw 5;

[0043] Rotating the lead screw 5 with a manual tool causes the nut 22, insulating block 3, and first sliding contact 8 to move axially along the autotransformer winding 9. The contact position of the first sliding contact 8 on the autotransformer winding 9 changes, thereby altering the output voltage.

[0044] 3. Observe the instruments and make adjustments accordingly;

[0045] During manual adjustment, observe the output voltmeter 12 and output ammeter 15 on the outer shell of the voltage regulating box. Manually adjust the rotation direction and angle of the lead screw 5 according to the test requirements to make the output voltage meet the test requirements.

[0046] The working principle of this utility model is as follows:

[0047] 1. The function of autotransformer winding 9;

[0048] The autotransformer winding 9 is a type of transformer winding in which the input and output terminals share a portion of the winding. The output voltage of the autotransformer winding 9 can be changed by altering the contact position of the first sliding contact 8 on the autotransformer winding 9. When the first sliding contact 8 is close to the input terminal of the autotransformer winding 9, the output voltage is lower; when the first sliding contact 8 is away from the input terminal, the output voltage gradually increases.

[0049] 2. Lead screw 5 transmission and sliding contact head movement;

[0050] The rotation of the lead screw 5 is converted into linear motion through the transmission of the nut 22. The movement of the nut 22 drives the insulating block 3 and the first sliding contact 8 to move along the axial direction of the autotransformer winding 9. This transmission method can precisely control the position of the first sliding contact 8, thereby achieving precise regulation of the output voltage.

[0051] The principle of electric and manual switching in this utility model is as follows:

[0052] 1. Electric switching principle;

[0053] The forward and reverse rotation of motor 18 is achieved through forward and reverse rotation control module 16. Forward and reverse button 14 transmits signals to forward and reverse rotation control module 16, which controls the forward and reverse rotation of motor 18 according to the input signals. The rotation of motor 18 is transmitted to lead screw 5 through gear transmission mechanism 20, achieving electric voltage regulation.

[0054] 2. Manual switching principle;

[0055] When manual pressure adjustment is required, a hand tool is inserted into the square socket at the top of the lead screw 5, and the lead screw 5 is rotated directly. At this time, the rotation of the lead screw 5 no longer depends on the motor 18, but is achieved through manual operation. This design allows the pressure regulator to continue operating normally even when the electric actuator fails, improving the reliability and flexibility of the pressure regulator.

[0056] The embodiments described in this specification are merely examples of implementations of the inventive concept. The scope of protection of this utility model should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A test voltage regulator that can be used both manually and electrically, characterized in that: The device includes a voltage regulating box, which is fixedly equipped with a partition that divides the box into an upper chamber and a lower chamber. An autotransformer winding and a lead screw are installed in the upper chamber, while a motor is installed in the lower chamber. The motor's output shaft is connected to the lead screw via a gear transmission mechanism. A nut is mounted on the lead screw, and an insulating block is fixedly connected to the nut. A first sliding contact is mounted on the insulating block and rests against the autotransformer winding. An input voltmeter, an output ammeter, and an output voltmeter are installed on the outer shell of the voltage regulating box. The upper and lower ends of the autotransformer winding are connected to a power source via first wires, and the input voltmeter and input ammeter are connected to the first wires. The lower end of the autotransformer winding and the first sliding contact are connected to a test sample via second wires, and the output voltmeter and output ammeter are connected to the second wires.

2. The test voltage regulator that can be used both manually and electrically according to claim 1, characterized in that: A square insertion hole is provided at the upper end of the lead screw.

3. The test voltage regulator that can be used both manually and electrically according to claim 1, characterized in that: A sliding contact line is fixedly connected inside the upper cavity. A copper clamp is installed on the insulating block. A first sliding contact is installed on the copper clamp. A second sliding contact is assembled inside the sliding contact line. The second sliding contact is connected to the copper clamp. One end of the second conductor is connected to the sliding contact line.

4. A test voltage regulator that can be used both manually and electrically, according to any one of claims 1 to 3, characterized in that: A guide rail, a push-pull electromagnet, and a forward / reverse control module are installed in the lower cavity. A forward / reverse button is installed on the voltage regulating box. A slider is mounted on the guide rail. The motor is mounted on the slider. The pull rod in the push-pull electromagnet is connected to the slider. The forward / reverse button is connected to the input terminal of the forward / reverse control module. The motor is connected to the output terminal of the forward / reverse control module. The power supply is connected to the push-pull electromagnet and the forward / reverse control module.

5. A test voltage regulator that can be used both manually and electrically, as described in claim 4, is characterized in that: The gear transmission mechanism is a reduction bevel gear transmission mechanism.

6. A test voltage regulator that can be used both manually and electrically, according to any one of claims 1 to 3, characterized in that: The voltage regulating box is equipped with four terminals. The first and second wires are connected to the power supply and the test sample respectively through the terminals.

7. A test voltage regulator that can be used both manually and electrically, according to any one of claims 1 to 3, characterized in that: The insulating block is made of bakelite, and a guide sleeve is fixedly installed inside the bakelite. A guide rod is installed inside the guide sleeve, and the guide rod is fixedly connected to the upper cavity.

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