CN201724777U

CN201724777U - Grounding type pressure transmitter

Info

Publication number: CN201724777U
Application number: CN2010202787254U
Authority: CN
Inventors: 曾广胜; 陈旭财; 严伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-02
Filing date: 2010-08-02
Publication date: 2011-01-26
Anticipated expiration: 2020-08-02

Abstract

A grounding type pressure transmitter comprises a tubular elastic element; the tubular elastic element is connected with a four-core cable successively through a fluoroelastomer sealing ring, a metal outer tube and a Hirschmann connector; the tubular elastic element is also connected successively with an insulation ring, a binding plate, a functional plate and a protection plate; the insulation ring, the binding plate, the functional plate and the protection plate are all mounted in the metal outer tube; radiating fins are disposed on the functional plate; a structural stress groove and a welding stress groove are formed on the tubular elastic element; the internal side of the tubular elastic element is connected with a damper, and is also provided with a support ring; the inner rim of the support ring is integrated with the protection plate by bonding; the outer rim of the support ring is contacted with the metal outer tube; and the metal outer tube is directly connected with a ground wire. The transmitter of the utility model effectively reduces the influence to test result caused by electromagnetic interference and working environment temperature variation; is beneficial to improving measurement precision; and achieves the advantages of simple structure and low manufacturing cost.

Description

A kind of grounded pressure transmitter

Technical field

The utility model relates to a kind of pressure unit, especially relates to a kind of grounded pressure transmitter.

Background technology

Existing pressure unit generally all can have electric charge accumulation, thereby form electric wave, magnetic interference in conductive process when the conduction signal, influence measuring accuracy.Simultaneously, along with the prolongation of working time, owing to the electric charge that feature board gathers can't be got rid of, and electric charge is cumulative, will produce certain heat, causes the rising of operating ambient temperature, and the electric elements performance is reduced, and causes measuring accuracy to guarantee.Fig. 1 is a kind of typical traditional pressure unit one-piece construction synoptic diagram; it is made up of tubular flexible member 1, fluororubber (ED) O-ring seal 2, dead ring 3, outer tube 4, heat radiator 5, Hirschmann (Hirschmann) connector 6, quad 7, fender 8, feature board 9, binding board 10, stress groove 11, welding stress groove 12, damper 13; fender 8, feature board 9 and binding board 10 threes are connected as a single entity by row's pin; binding board 10 separates by dead ring 3 with tubular flexible member 1, does not all contact with outer tube 4.So, in the time of in working order, can't shift the electric charge of generation, and electric charge is cumulative, produce electrical measurement thus and disturb, the electric elements precision is reduced, test is caused error.

Existing pressure unit improvement project has just been done some compensation to the error that the rising of operating ambient temperature causes measurement, and as adopting bridge circuit compensation and foil gauge compensation, still, operation bothers, and effect is not good enough yet.To the indemnifying measure research of electromagnetic interference (EMI), not seeing has bibliographical information.

The utility model content

The purpose of this utility model is to overcome the above-mentioned defective that prior art exists, the influence that provides a kind of lifting that can effectively reduce electromagnetic interference (EMI) and operating ambient temperature that test result is produced, improve measuring accuracy, and simple in structure, the grounded pressure transmitter of low cost of manufacture.

The purpose of this utility model is achieved through the following technical solutions: it comprises the tubular flexible member; metal outer pipe; the Hirschmann connector; dead ring; binding board; feature board and fender; described tubular flexible member passes through viton seal ring; metal outer pipe; the Hirschmann connector is connected successively with quad; described tubular flexible member again with dead ring; binding board; feature board is connected successively with fender; described dead ring; binding board; feature board and fender are installed in the described metal outer pipe; described feature board is provided with heat radiator; described tubular flexible member is provided with structural stress groove and welding stress groove; tubular flexible member inside links to each other with damper; also be provided with support ring; described support ring inner edge and fender are bonded to one; the support ring outer rim contacts with metal outer pipe, and metal outer pipe directly links to each other with ground wire.

The copper plate material that the preferred conduction function of described support ring material is strong is to promote the usability of product.

The utility model is in aggregates by support ring inner edge and fender bonding; the support ring outer rim contacts in metal outer pipe and forms the property led connection; outer tube directly links to each other with ground wire; thereby in the pressure conductive process; the static charge that can get rid of feature board effectively; reduce electromagnetic interference (EMI), reduce the generation of heat, make test data accurately stable.Described support ring also with correcting and the fixedly effect of fender, makes assembling easier except that having grounding function.

Description of drawings

Fig. 1 is existing pressure unit one-piece construction synoptic diagram;

Fig. 2 is the utility model pressure unit embodiment one-piece construction synoptic diagram;

Fig. 3 (a) is a support ring structural representation (front view) embodiment illustrated in fig. 2;

Fig. 3 (b) is a support ring side view embodiment illustrated in fig. 2.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

With reference to Fig. 2; present embodiment comprises tubular flexible member 14; metal outer pipe 17; Hirschmann connector 20; dead ring 16; binding board 24; feature board 23 and fender 22; described tubular flexible member 14 is by viton seal ring 15; metal outer pipe 17; Hirschmann connector 20 is connected successively with quad 21; tubular flexible member 14 also with dead ring 16; binding board 24; feature board 23 is connected successively with fender 22; dead ring 16; binding board 24; feature board 23 and fender 22 also are installed in the metal outer pipe 17; feature board 23 is provided with heat radiator 18; tubular flexible member 14 is provided with structural stress groove 25 and welding stress groove 26; tubular flexible member 14 inside link to each other with damper 27; also be provided with support ring 19; described support ring 19 inner edges and fender 22 are bonded to one; support ring 19 outer rims contact with metal outer pipe 17, and metal outer pipe 17 directly links to each other with ground wire.

Fig. 3 (a) and (b) are the structural representation of the support ring 19 of present embodiment.The wall thickness of support ring is 0.3mm; Material is selected the strong copper plate material of conduction function.

With respect to existing pressure unit; the difference of present embodiment only is; fender 22 forms the property led by support ring 19 with metal outer pipe 17 and is connected; and fender 22, feature board 23 and binding board 24 phase mutual conductances are connected; metal outer pipe 17 directly links to each other with ground wire, makes the electric charge that the time can in time shift generation in work, eliminates the interference in electric wave and magnetic field; the temperature that produces when reducing electric elements work has been avoided the reduction of electric elements performances.

Claims

1. grounded pressure transmitter; comprise the tubular flexible member; metal outer pipe; the Hirschmann connector; dead ring; binding board; feature board and fender; described tubular flexible member passes through viton seal ring; metal outer pipe; the Hirschmann connector is connected successively with quad; described tubular flexible member again with dead ring; binding board; feature board is connected successively with fender; described dead ring; binding board; feature board and fender are installed in the described metal outer pipe; described feature board is provided with heat radiator; described tubular flexible member is provided with structural stress groove and welding stress groove; tubular flexible member inside links to each other with damper; it is characterized in that; also be provided with support ring; described support ring inner edge and fender are bonded to one; the support ring outer rim contacts with metal outer pipe, and metal outer pipe directly links to each other with ground wire.