A device and method for installing a circuit breaker plum blossom contact tension spring

Abstract

The present invention discloses a device and method for installing a tension spring of a circuit breaker plum blossom contact. The device comprises a support rod, a control ring, a push umbrella, and a fixing ring. The control ring is slidably arranged on the support rod and can slide along the axial direction of the support rod. The control ring is connected to the push umbrella by a connecting rod, and the opening or slope of the push umbrella is controlled by sliding along the axial direction of the support rod. A circle of fixing hooks for the tension spring is provided on the upper part of the push umbrella. The fixing ring fixedly connects the lower end of the support rod with the lower end of the push umbrella. In a closed state, the upper end of the push umbrella is thin and the lower end is large. The circumference of the upper end is smaller than the circumference of the tension spring in a free state, i.e., when no load is applied, while the circumference of the lower end is larger than the circumference of the circuit breaker plum blossom contact. When the push umbrella is in a fully open state, the diameter of the upper end of the push umbrella is larger than the diameter of the lower end. The device and method of the present invention can be used to quickly and non-destructively install the tension spring.

Description

Technical Field

[0001] The present invention relates to a device and method for installing a tension spring of a circuit breaker plum blossom contact, which is mainly used in the field of maintenance and repair of plum blossom contact circuit breakers in electrical switching equipment. When a tension coil spring (hereinafter referred to as the tension spring) in a circuit breaker needs to be replaced or repaired, the tension spring can be quickly installed and disassembled. Background Art

[0002] In high-voltage circuit breaker contacts used in electrical switchgear, tension springs often fail due to factors such as breakage, overheating, and stress relaxation. Consequently, these springs often need to be removed and installed for replacement or testing. However, improper installation and removal techniques or equipment can easily cause localized excessive stress and deformation of the springs. Therefore, a specialized device for installing tension springs in circuit breaker contacts, ensuring quick and non-destructive installation, is urgently needed for the maintenance and repair of circuit breaker contacts in electrical switchgear. Summary of the Invention

[0003] The purpose of the present invention is to fill the deficiencies in the existing field and provide a device and method for installing a tension spring of a circuit breaker plum blossom contact.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A device for installing a tension spring for a circuit breaker plum blossom contact comprises a support rod 1, a control ring 2, a push umbrella 3, and a fixing ring 4. The control ring 2 is slidably arranged on the support rod 1 and can slide axially along the support rod 1. The control ring 2 is connected to the push umbrella 3 by a connecting rod, and the opening or slope of the push umbrella 3 is controlled by sliding axially along the support rod 1. A fixing hook 31 for a tension spring 5 is provided on the upper portion of the push umbrella 3. The fixing ring 4 fixedly connects the lower end of the support rod 1 to the lower end of the push umbrella 3.

[0006] In the closed state, the upper end of the push umbrella 3 is thin and the lower end is large. The circumference of the upper end is smaller than the circumference of the tension spring 5 in the free state, that is, when it is unloaded, while the circumference of the lower end is larger than the circumference of the circuit breaker plum blossom contact; when the push umbrella 3 is in the fully open state, the diameter of the upper end of the push umbrella 3 is larger than the diameter of the lower end.

[0007] Preferably, when the push umbrella 3 is in the fully opened state, the upper end diameter of the push umbrella 3 is 1.2 times greater than the lower end diameter. Preferably, the support rod 1, control ring 2, push umbrella 3 and fixing ring 4 are all made of steel, the strength of which at least ensures that it does not deform under the compression force of the spring.

[0008] The method for installing a tension spring of a device for installing a circuit breaker plum blossom contact tension spring comprises the following steps:

[0009] Step 1: When the push umbrella 3 is in the closed state, the upper end diameter of the push umbrella 3 is smaller than the lower end diameter, the upper end circumference is smaller than the circumference of the tension spring 5 in the free state (i.e., without load), and the lower end circumference is larger than the circumference of the circuit breaker plum blossom contact. At this time, the tension spring 5 is placed on the upper end side of the push umbrella 3 and fixed to the fixing hook 31 on the push umbrella 3.

[0010] Step 2: Place the circuit breaker contact, on which the tension spring 5 is to be installed, into the lower end of the push umbrella 3, keeping them coaxial so that the lower end of the push umbrella 3 just touches the circuit breaker contact tension spring groove 6; then use the control ring 2 to move along the support rod 1 toward the fixed ring 4 to open the push umbrella 3; when the upper end diameter of the push umbrella 3 is larger than the lower end diameter, the tension spring 5 is in a stretched state and slides toward the lower end of the push umbrella 3;

[0011] Step 3: When the push umbrella 3 is in the fully open state, slide the tension spring 5 along the slope of the push umbrella 3 to the circuit breaker plum blossom contact tension spring groove 6, and the installation is completed.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] When the spring is installed by adopting the invention, the spring is evenly stressed, thereby preventing the spring from being locally deformed due to uneven stress; the operation is simple, and the spring can be quickly and accurately installed in a predetermined spring groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the structure of the device of the present invention.

[0015] Figure 2a This is a schematic diagram of the closed state of the push umbrella device of the present invention.

[0016] Figure 2b This is a schematic diagram of the process of pushing an umbrella to open using the device of the present invention.

[0017] Figure 2c This is a schematic diagram of the fully opened state of the push umbrella device of the present invention.

[0018] Description of reference numerals:

[0019] 1 is a support rod, 2 is a control ring, 3 is a push umbrella, 4 is a fixing ring, 5 is a tension spring, 6 is a circuit breaker plum blossom contact tension spring groove, and 31 is a fixing hook. DETAILED DESCRIPTION

[0020] The present invention is further described below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1As shown, the present invention provides a device for installing a tension spring for a circuit breaker contact, comprising a support rod 1, a control ring 2, a pusher 3, and a retaining ring 4. The control ring 2 is slidably mounted on the support rod 1 and can slide axially along the support rod 1. The control ring 2 and the pusher 3 are connected by a connecting rod, and the opening (or slope) of the pusher 3 is controlled by sliding axially along the support rod 1. A retaining hook 31 for a tension spring 5 is provided on the upper portion of the pusher 3 to prevent the tension spring 5, which is pre-installed on the pusher 3 before installation, from slipping out. The retaining ring 4 securely connects the lower end of the support rod 1 to the lower end of the pusher 3.

[0022] When using the device of the present invention to install the tension spring, the following steps are included:

[0023] Step 1: When the push umbrella 3 is in the closed state, the upper diameter of the push umbrella 3 is smaller than the lower diameter, the upper circumference is smaller than the circumference of the tension spring 5 in the free state (no load), and the lower circumference is larger than the circumference of the circuit breaker plum blossom contact; at this time, the tension spring 5 is placed on the upper end side of the push umbrella 3 and fixed to the fixing hook 31 on the push umbrella 3, as shown in FIG. Figure 2a shown.

[0024] Step 2: Place the circuit breaker plum blossom contact to which the tension spring 5 is to be installed into the lower end of the push umbrella 3, keeping it coaxial so that the lower end of the push umbrella 3 just touches the circuit breaker plum blossom contact tension spring groove 6; then use the control ring 2 to move along the support rod 1 toward the fixed ring 4 to open the push umbrella 3; when the upper end diameter of the push umbrella 3 is larger than the lower end diameter, the tension spring 5 is in a stretched state and slides toward the lower end of the push umbrella 3, as shown in FIG. Figure 2b shown.

[0025] Step 3: When the push umbrella 3 is in the fully open state, slide the tension spring 5 along the slope of the push umbrella 3 to the circuit breaker plum blossom contact tension spring groove 6. The installation is completed. Figure 2c shown.

Claims

1. A device for installing a tension spring for a circuit breaker contact, characterized by: The invention comprises a support rod (1), a control ring (2), a push umbrella (3) and a fixing ring (4); the control ring (2) is slidably arranged on the support rod (1) and can slide along the axial direction of the support rod (1); the control ring (2) and the push umbrella (3) are connected through a connecting rod, and the opening or slope of the push umbrella (3) is controlled by sliding along the axial direction of the support rod (1); a fixing hook (31) of a circle of tension spring (5) is provided on the upper part of the push umbrella (3); the fixing ring (4) fixes the lower end of the support rod (1) and the lower end of the push umbrella (3); The method for installing a tension spring of a device for installing a circuit breaker plum blossom contact tension spring comprises the following steps: Step 1: When the push umbrella (3) is in a closed state, the upper end diameter of the push umbrella (3) is smaller than the lower end diameter, the upper end circumference is smaller than the circumference of the tension spring (5) in a free state, i.e., when no load is applied, and the lower end circumference is larger than the circumference of the circuit breaker plum blossom contact; at this time, the tension spring (5) is placed on the upper end side of the push umbrella (3) and fixed to the fixing hook (31) on the push umbrella (3); Step 2: Place the circuit breaker contact on which the tension spring (5) is to be installed into the lower end of the push umbrella (3), keeping them coaxial, so that the lower end of the push umbrella (3) just contacts the circuit breaker contact spring groove (6); then use the control ring (2) to move along the support rod (1) in a direction close to the fixed ring (4) to open the push umbrella (3); when the upper end diameter of the push umbrella (3) is larger than the lower end diameter, the tension spring (5) is in a stretched state and slides toward the lower end of the push umbrella (3); Step 3: When the push umbrella (3) is in a fully opened state, the tension spring (5) is slid along the slope of the push umbrella (3) to the circuit breaker plum blossom contact tension spring groove (6), and the installation is completed.

2. The device for installing a circuit breaker plum blossom contact tension spring according to claim 1, characterized in that: In the closed state, the push umbrella (3) is thin at the upper end and large at the lower end, the circumference of the upper end is smaller than the circumference of the tension spring (5) in the free state, i.e., when it is unloaded, while the circumference of the lower end is larger than the circumference of the circuit breaker plum blossom contact; when the push umbrella (3) is in the fully open state, the diameter of the upper end of the push umbrella (3) is larger than the diameter of the lower end.

3. The device for installing a circuit breaker plum blossom contact tension spring according to claim 2, characterized in that: When the pushing umbrella (3) is in a fully opened state, the diameter of the upper end of the pushing umbrella (3) is 1.2 times greater than the diameter of the lower end.

4. The device for installing a circuit breaker plum blossom contact tension spring according to claim 1, characterized in that: The support rod (1), the control ring (2), the push umbrella (3) and the fixing ring (4) are all made of steel, and their strength at least ensures that they do not deform under the pressing force of the spring.

Images