CN204649779U - A kind of capacitor type wall bushing end shield adapter - Google Patents

Abstract

A capacitive wall bushing end screen adapter, which has a lead-out push rod, a cylindrical shell, and a guide rod. The two ends of the shell are respectively provided with a top cover and a bottom plate. A through hole in the inner cavity and on the same center line, the lower end of the lead wire push rod is fixed with a sleeve, the lead wire push rod and the sleeve are in the cavity of the housing, and the lead wire push rod extends upward through the passage of the top cover The hole protrudes from the top cover, the upper part of the guide rod is inserted into the sleeve and a sliding contact is formed between its outer peripheral surface and the inner wall of the sleeve, the lower end of the guide rod is inserted into the through hole of the bottom plate and is fixedly connected, and the guide rod and A spring is arranged between the sleeve and the bottom plate. The utility model has the advantages of simple structure, reliable connection between the leading rod and the guide rod, and good sealing performance.

Description

A capacitive wall bushing end screen adapter

technical field

The utility model relates to an auxiliary device for matching and connecting the end screen of a capacitive wall-piercing bushing and a current sensor, in particular to an adapter for the end screen of a capacitive wall-piercing bushing.

Background technique

At present, with the application of intelligent power system, the online detection system of capacitive wall bushing is more and more widely used. The capacitive wall bushing on-line monitoring system needs to lead the current signal of the end screen of the bushing to the current sensor. In order to ensure a better connection between the end screen of the bushing and the current sensor adapter to connect. The current capacitive bushing end screen adapter is prone to disconnection when the equipment is in operation for a long time. In addition, if the sealing performance is not good, a lot of electromagnetic interference will be introduced, which will increase the signal-to-noise ratio of the collected signal and make the data distorted.

Contents of the invention

The purpose of the utility model is to provide an adapter for the end screen of the capacitive wall-through bushing with reliable connection.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model has a lead-out push rod, a cylindrical shell, and a guide rod, and the two ends of the shell are respectively provided with a top cover and a bottom plate, and the top cover and the bottom There is a through hole leading to the inner cavity of the housing and on the same center line. A sleeve is fixed at the lower end of the lead-out line push rod. The lead-out line push rod and the sleeve are located in the cavity of the shell, and the lead-out line push rod extends upwards through The through hole of the top cover protrudes from the top cover, the upper part of the guide rod is inserted into the sleeve and forms a sliding contact between its outer peripheral surface and the inner wall of the sleeve, the lower end of the guide rod is inserted into the through hole of the bottom plate and is fixedly connected, A spring is arranged on the guide rod and between the sleeve and the bottom plate.

A first sealing ring is provided between the top surface of the housing and the top cover, and a second sealing ring is provided between the bottom surface of the housing and the bottom plate.

A third sealing ring and a fourth sealing ring are respectively provided at the opening of the through hole on the top surface of the top cover and at the opening of the through hole on the bottom surface.

A sliding sleeve is provided on the guide rod and between the sleeve and the spring.

The inner chamber of the housing is composed of an upper chamber, a middle chamber and a lower chamber. The diameters of the upper and lower chambers are larger than the diameter of the middle chamber. The sleeve is located in the middle chamber. The top cover is composed of a cover plate and a positioning column. The positioning column It is inserted into the upper chamber of the housing, and an inner cylinder attached to the inner wall is arranged in the lower chamber of the housing, and the sliding sleeve and the spring are located in the inner cylinder.

The sliding sleeve is composed of an upper cylinder and a lower chassis. The upper part of the inner cylinder has an inwardly protruding ring body. The inner diameter of the ring body is consistent with the diameter of the middle cavity of the housing. The inner diameter of the inner cylinder ring.

The utility model has the following positive effects: 1. The utility model has a simple structure, and adopts the insertion of the ejector rod and the guide rod, so that the lead-out wire ejector rod and the guide rod realize relative displacement in the cylindrical shell, and the setting of the spring can ensure that the lead-out wire top The rod always has sufficient ejection force, which not only makes the connection reliable, but also can adapt to the amount of expansion and contraction in different situations. 2. The connecting part of the ejector rod and the guide rod of the utility model is set in the housing, and the two ends of the housing are provided with a top cover and a bottom plate. body seal. The arrangement of the third sealing ring and the fourth sealing ring improves the sliding sealing performance of the lead-out push rod in the through hole of the top cover, so the utility model has good sealing performance.

Description of drawings

FIG. 1 is an external view of Embodiment 1. FIG.

FIG. 2 is a structural diagram of Embodiment 1. FIG.

Fig. 3 is a perspective view after embodiment 1 is cut.

Detailed ways

Example 1

See Fig. 1 to Fig. 3, present embodiment has lead-out line ejector rod 1, cylindrical casing 3, guide rod 9, and the two ends of casing 3 are respectively provided with top cover 2 and bottom plate 8, and top cover 2 and bottom plate 8 are Each is provided with a through hole leading to the inner cavity of the housing and on the same center line. The top cover 2 is made of Teflon plastic, the shell 3 is made of stainless steel, and the lead rod 1 is made of brass with good electrical conductivity.

The inner chamber of the housing is composed of an upper chamber 3a, a middle chamber 3b and a lower chamber 3c, and the diameters of the upper chamber 3a and the lower chamber 3c are larger than the diameter of the middle chamber 3b. The top cover 2 is composed of a cover plate 2-1 and a positioning column 2-2, and the positioning column 2-2 is inserted into the upper cavity 3a of the housing. An inner cylinder 5 adhering to the inner wall is arranged in the lower chamber 3c of the housing.

A sleeve 4 is fixed to the lower end of the lead-out line push rod 1, and the lead-out line push rod 1 and the sleeve 4 are integral. The leading rod 1 and the sleeve 4 are located in the cavity of the housing 3, wherein the sleeve 6 is located in the middle cavity. The lead wire push rod 1 extends upwards through the through hole of the top cover 2 to protrude from the top cover 2, and the protruding end of the lead wire push rod is connected with the current sensor.

The upper part of the guide rod 9 is inserted into the sleeve 4 and forms a sliding contact between its outer peripheral surface and the inner wall of the sleeve 4. The lower end of the guide rod 9 is inserted into the through hole of the bottom plate 8 and is fixedly connected. The guide rod 9 is connected to the high pressure Connect the lead-out line at the end of the sleeve tube. In the inner cylinder 5 , between the sleeve 4 and the bottom plate 8 are provided a sliding sleeve 6 and a spring 7 which are sleeved on the guide rod 9 .

The sliding sleeve 6 is composed of an upper cylinder 6-1 and a lower chassis 6-2. The chassis 6-2 is pressed on the spring 7, under the action of the spring 7, the cylinder 6-1 of the sliding sleeve 6 leans upward on the sleeve 4, so that the sleeve 4 presses the top cover 2 upward through the fourth sealing ring 14 .

The upper part of the inner cylinder 5 has an inwardly protruding ring body 5 - 1 , the inner diameter d2 of the ring body 5 - 1 is consistent with the diameter d1 of the cavity 3 b of the housing, so as to ensure smooth sliding of the sliding sleeve 6 . The outer diameter D of the chassis 6-2 of the sliding sleeve 6 is larger than the inner diameter d2 of the ring body 5-1 of the inner cylinder, and the ring body 5-1 of the inner cylinder acts as a limiter for the chassis 6-2 of the sliding sleeve 6 .

A first seal ring 11 is provided between the top surface of the housing 3 and the top cover 2, a second seal ring 12 is provided between the bottom surface of the housing 3 and the bottom plate 8, the first seal ring 11 and the second seal ring 12 so that both the top cover 2 and the bottom plate 8 can be sealed to the housing 3 . In order to increase the sliding sealing performance of the lead-out push rod 1 in the through hole of the top cover 2, a third sealing ring is respectively provided at the through hole opening on the top surface of the top cover 2 and at the through hole opening on the bottom surface. 13 and the fourth sealing ring 14.

Claims (6)

1. a capacitor type wall bushing end shield adapter, there is extension line push rod (1), tubular shell (3), guide rod (9), it is characterized in that: the two ends of housing (3) are respectively equipped with top cover (2) and base plate (8), top cover (2) and base plate (8) are respectively provided with and lead to housing cavity and the through hole being in same center line, the lower end of described extension line push rod (1) is fixed with sleeve (4), extension line push rod (1) and sleeve (4) are in the chamber of housing (3), and the through hole that extension line push rod (1) extends upward through top cover (2) stretches out top cover (2), the top of described guide rod (9) to be inserted in sleeve (4) and is formed sliding contact between the inwall of its outer peripheral face and sleeve (4), the lower end of guide rod (9) to be inserted in the through hole of base plate (8) and for being fixedly connected with, guide rod (9) is gone up and is between sleeve (4) and base plate (8) and is provided with spring (7).

2. capacitor type wall bushing end shield adapter according to claim 1, it is characterized in that: between the end face of described housing (3) and top cover (2), be provided with the first O-ring seal (11), between the bottom surface of housing (3) and base plate (8), be provided with the second O-ring seal (12).

3. capacitor type wall bushing end shield adapter according to claim 2, is characterized in that: the through hole aperture place on the end face of described top cover (2) and the through hole aperture place on bottom surface are respectively equipped with the 3rd O-ring seal (13) and the 4th O-ring seal (14).

4. capacitor type wall bushing end shield adapter according to claim 1, is characterized in that: described guide rod (9) is gone up and is between sleeve (4) and spring (7) and is provided with sliding sleeve (6).

5. capacitor type wall bushing end shield adapter according to claim 4, it is characterized in that: described housing cavity is by epicoele (3a), lumen (3b) and cavity of resorption (3c) composition, on, cavity of resorption (3a, diameter 3c) is greater than lumen (3b) diameter, described sleeve (6) is positioned at lumen, described top cover (2) is made up of cover plate (2-1) and reference column (2-2), reference column (2-2) inserts in the epicoele (3a) of housing, the inner core (5) be affixed with inwall is provided with in housing cavity of resorption (3c), described sliding sleeve (6) and spring (7) are in inner core (5).

6. capacitor type wall bushing end shield adapter according to claim 5, it is characterized in that: described sliding sleeve (6) is made up of the cylinder (6-1) on top and the chassis (6-2) of bottom, the top of described inner core (5) has inwardly outstanding ring body (5-1), the internal diameter (d2) of ring body (5-1) is consistent with the diameter (d1) of housing lumen (3b), and the external diameter (D) on the chassis (6-2) of sliding sleeve (6) is greater than the internal diameter (d2) of inner core ring body (5-1).