CN207936977U - Capacitance sensor - Google Patents

Abstract

The utility model discloses a kind of capacitance sensors；Including epoxy resin shell, first electrode, second electrode；The first electrode and second electrode is mounted in epoxy resin shell, and epoxy resin shell wraps first electrode and second electrode；Shape and gap are socketed in the outside of first electrode and keep concentric with first electrode the gauze screen of second electrode in a ring；The surface of the first electrode is handled by annular knurl, is had and is prevented pulling out slot.Prevent pulling out slot since the utility model first electrode has, the combination of first electrode and epoxy resin can be increased, there is the anti-function of pulling out anti-rotation, first electrode and second electrode keep concentric, first electrode keeps accurate overlying relation with second electrode, play using for shielding electric field, the insulation of epoxy resin shell mixture.

Description

Capacitance sensor

Technical field

The utility model is related to a kind of sensors, more particularly to a kind of capacitance sensor.

Background technology

Existing scheme is with ceramic body 10（As shown in Figure 1）For medium, since ceramic electrical has temperature drift, capacitance is unstable Fixed, material cost is also relatively high.It is not glued with epoxy resin due to ceramics in ceramic capacitor pressure injection to epoxy resin, is often had Breakdown is scrapped.Traditional 35KV10PF ceramic capacitors have the disadvantage that：1, capacitance temperature drift is bigger；2, pressure resistance is easy to hit It wears；3, shelf depreciation qualification rate is low；4, of high cost.

Invention content

The purpose of this utility model is to provide a kind of capacitance sensors firmly installed.

To achieve the above object, the technical solution of the utility model is：

The utility model is a kind of capacitance sensor；Including epoxy resin shell, first electrode, second electrode；Described First electrode and second electrode are mounted in epoxy resin shell, and epoxy resin shell wraps up first electrode and second electrode solid It lives calmly；The gauze screen of second electrode in a ring shape and be socketed in first electrode outside and with first electrode keep it is concentric；It is described The surface of first electrode handled by annular knurl, have and anti-pull out slot.

The gauze screen of the second electrode is metal mesh, and surface is surrounded by semiconductor crimped paper.

After adopting the above scheme, since the utility model first electrode surface has annular knurl processing, have and prevent pulling out slot, Ke Yizeng The combination for adding first electrode and epoxy resin has the anti-function of pulling out anti-rotation, and second electrode is metal mesh, and surface is surrounded by semiconductor Crimped paper, first electrode and second electrode keep concentric, and first electrode keeps accurate overlying relation with second electrode, rise To using for shielding electric field, the insulation of epoxy resin shell mixture, and two electrode costs are relatively low.

The utility model is further described in the following with reference to the drawings and specific embodiments.

Description of the drawings

Fig. 1 is the structural schematic diagram of existing capacitance sensor；

Fig. 2 is the structural schematic diagram of the utility model.

Specific implementation mode

As shown in Fig. 2, the utility model is a kind of capacitance sensor；Including epoxy resin shell 1, first electrode 2, second Electrode 3.

The first electrode 2 and second electrode 3 is mounted in epoxy resin shell 1, and epoxy resin shell 1 is electric by first Pole 2 and second electrode 3 wrap.

The gauze screen 31 of second electrode shape in a ring is metal mesh, and surface is surrounded by semiconductor crimped paper.Second electricity 31 gap of gauze screen of pole 3 is socketed in the outside of first electrode 2 and keeps concentric with first electrode 2.

The surface of the first electrode 2 is handled by annular knurl, is had and is prevented pulling out slot.

The operation principle of the utility model：

The epoxy resin shell 1 of the utility model is to pass through two accurate-sizes using mixture of epoxy resins as medium Metal（First electrode 2 and second electrode 3）The capacitance that output accuracy is ± 1, capacitance will not change with temperature height.This Utility model can bear shelf depreciation under 100KV pressure tests in 5 minutes and 48.6KV voltages and be less than 5PC.

The emphasis of the utility model is that：Second electrode gap is socketed in the outside of first electrode and is protected with first electrode It holds with one heart.

The above, only the utility model preferred embodiment, therefore the utility model implementation cannot be limited with this Range all should still belong to this reality that is, according to equivalent changes and modifications made by present utility model application the scope of the claims and description In the range of being covered with new patent.

Claims (2)

1. a kind of capacitance sensor；It is characterized in that：Including epoxy resin shell, first electrode, second electrode；Described first Electrode and second electrode are mounted in epoxy resin shell, and epoxy resin shell wraps first electrode and second electrode Firmly；Shape is socketed in the outside of first electrode and keeps concentric with first electrode the gauze screen of second electrode in a ring；Described The surface of one electrode is handled by annular knurl, is had and is prevented pulling out slot.

2. capacitance sensor according to claim 1, it is characterised in that：The gauze screen of the second electrode is metal Net, surface are surrounded by semiconductor crimped paper.