Claims for Patent: 8,269,128

Summary for Patent: 8,269,128

Title:	Vacuum switch tube
Abstract:	A vacuum switch tube is provided, which includes a first conductive rod disposed with a first contact and a second conductive rod disposed with a second contact. The first contact and the second contact are disposed facing each other and sealed in a vacuum tube body. Contact bodies of the first contact and the second contact are spheres with spherical caps at two ends being cut off. The first contact and the second contact respectively include conductive members and magnetic members extending in the same direction and joining with each other to form the contact bodies. The cross section shape of the magnetic members is divided by a neutrality line into two unequal regions. The magnetic member of the first contact and the conductive member of the second contact are correspondingly disposed. The conductive member of the first contact and the magnetic member of the second contact are correspondingly disposed. The vacuum switch tube of the present invention can generate a rotating magnetic field in a vacuum gap formed between contact surfaces of two vacuum switch contacts in a vacuum arc-extinguishing chamber, so as to increase high-voltage resistant capability of the vacuum switch tube, which can be applied in a vacuum switch device of a higher voltage circuitry.
Inventor(s):	Ren; Jianchang (Beijing, CN)
Assignee:	Beijing Orient Vacuum Electric Co., Ltd. (Beijing, CN)
Application Number:	12/698,861
Patent Claims:	1. A vacuum switch tube, comprising: a first conductive rod and a second conductive rod, a first contact is disposed at an end of the first conductive rod, a second contact is disposed at an end of the second conductive rod, the first contact and the second contact are disposed facing each other and sealed in a vacuum tube body, wherein, contact bodies of the first contact and the second contact are spheres with spherical caps at two ends being cut off; the first contact and the second contact respectively comprise conductive members and magnetic members extending in the same direction and joining with each other to form the contact bodies; the cross section shape of the magnetic members is divided by a neutrality line into two unequal regions; and the magnetic member of the first contact and the conductive member of the second contact are correspondingly disposed, and the conductive member of the first contact and the magnetic member of the second contact are correspondingly disposed. 2. The vacuum switch tube according to claim 1, wherein a shape of a cross section of the contact bodies of the first contact and the second contact is equally divided into an upper left region, a lower left region, an upper right region, and a lower right region by a horizontal midline and a vertical midline thereof; the upper right region is divided into a first upper right region adjacent to the upper left region and a second upper right region other than the first upper right region; the lower left region is divided into a first lower left region adjacent to the lower right region and a second lower left region other than the first lower left region, the conductive member is disposed in the first upper right region, the upper left region, and the second lower left region, the magnetic member is disposed in the first lower left region, the lower right region, and the second upper right region. 3. The vacuum switch tube according to claim 2, wherein the first upper right region and/or the first lower left region are half circle, a diameter edge of the first upper right region is adjacent to the upper left region, and a diameter edge of the first lower left region is adjacent to the lower right region. 4. The vacuum switch tube according to claim 1, wherein the first contact and the second contact are disposed in a cylindrical metal shell respectively. 5. The vacuum switch tube according to claim 4, wherein the contact bodies of the first contact and the second contact are respectively formed by a plurality of sheets laminated in sequence, each of the sheets is formed by conductive sheets and magnetic sheets joining and combining with each other, a plurality of conductive sheets form the conductive members, a plurality of magnetic sheets form the magnetic members. 6. The vacuum switch tube according to claim 5, wherein fixed holes penetrating each of the sheets are opened in the conductive sheets and the magnetic sheets, fixed rods are inserted in the fixed holes. 7. The vacuum switch tube according to claim 4, wherein the contact bodies consist of a plurality of conductive and magnetic poles or particles adjacent each other closely.