CN2634447Y

CN2634447Y - Weighing sensor

Info

Publication number: CN2634447Y
Application number: CN 03230827
Authority: CN
Inventors: 柯建东; 梅科达; 夏开新; 蒋国斌; 柴秋燕
Original assignee: Keli Sensor Manufacturing Co ltd Ningbo City
Current assignee: Keli Sensor Manufacturing Co ltd Ningbo City
Priority date: 2003-04-30
Filing date: 2003-04-30
Publication date: 2004-08-18
Anticipated expiration: 2013-04-30

Abstract

The utility model discloses a weighing sensor which comprises an elastic body which is made of stainless steel material, a resistance strain gauge stuck on the elastic body and a Wheatstone bridge connected to the resistance strain gauge. The weighing sensor also adopts the technical measure that a welded sealed diaphragm which is made of stainless steel material covers outside the resistance strain gauge. When the environmental condition has strong corrosiveness and strong electromagnetic interference, the components in the weighing sensor can be protected, the weighing sensor can normally weigh objects, and the weighing accuracy is ensured. The weighing sensor can be used for measuring force and weighing in the corrosion prevention operation and the electromagnetic interference prevention operation of the industries of chemical industry, food, medicine, sanitation, etc.

Description

A kind of LOAD CELLS

Technical field

The utility model relates to the resistance strain weighing transducer technical field, relates in particular to anticorrosion, anti-electromagnetic interference environment a kind of LOAD CELLS of use down.

Technical background

Existing known resistance strain weighing transducer; as Granted publication day be on September 29th, 1999; Granted publication number is CN2341132Y; the patent No. is that 9824618.5 Chinese utility model patent discloses a kind of LOAD CELLS; strain ga(u)ge sticks on the elastic body; and form Wheatstone bridge and be transformed into electric signal and measure; this LOAD CELLS is little for common working environment and corrosivity; the electromagnetic interference (EMI) circlet still can guarantee weighing precision in the border; yet under the environment that reaches than severe corrosive than strong electromagnetic; can't use; this is because strain ga(u)ge only sticks on the elastic body, does not pass through reliable protection.Its reason is the influence that general electronic devices and components and elastic body itself can not bear the radiation of deep-etching, forceful electric power magnetic, strain ga(u)ge is vulnerable to corrosion or electromagnetic interference (EMI) under reaching than the radiation of forceful electric power magnetic than deep-etching, thereby make resistance strain weighing transducer cause bigger weighing error, even can't use because of corrosion or electromagnetic interference (EMI).

Summary of the invention

Technical problem to be solved in the utility model is the present situation at prior art, and the LOAD CELLS of a kind of effective anticorrosion, anti-electromagnetic interference (EMI) effect is provided.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of LOAD CELLS, comprise elastic body that stainless steel material makes, stick on the strain ga(u)ge on the elastic body, and the Wheatstone bridge that connects strain ga(u)ge, the technical measures of taking also comprise: the strain ga(u)ge outside also is covered with the seal membrane of the stainless steel material making of welding.

For optimizing technique scheme, the measure of being taked also comprises:

Above-mentioned elastomer shape is a rectangular parallelepiped, and for improving its performance, its both sides respectively are shaped at least one blind hole, and the blind hole of both sides correspondence is for being provided with described blind hole bottom stickup 2 or 4 sheet resistance strainometers in opposite directions; Its other both sides then are shaped at least 2 round tube holes, so that install and use.

Above-mentioned elastomer shape is the rectangular parallelepiped that a step is arranged, and for improving its performance, its both sides respectively are shaped at least one blind hole, and the blind hole of both sides correspondence is for being provided with in opposite directions; 2 or 4 sheet resistance strainometers are pasted in described blind hole bottom; Its other both sides are positioned at and then are shaped at least 2 round tube holes on the described step, so that install and use.

Above-mentioned elastomer shape is the I-shaped body, and for improving its performance, its I-shaped body middle part is shaped on two parallel surfaces, respectively pastes 1 or 2 sheet resistance strainometers on two parallel surfaces, then is shaped on 1 or 2 round tube hole on the sidewall at this I-shaped body middle part, so that install and use.

For cooperating elastomer shape is that rectangular parallelepiped or the rectangular parallelepiped LOAD CELLS that a step is arranged are used, and above-mentioned seal membrane is a goblet, to guarantee the performance of this LOAD CELLS.

For cooperating elastomer shape is the LOAD CELLS use of I-shaped body, and above-mentioned seal membrane is the cylinder of hollow, and lateral surface is shaped on corrugated body in it, to guarantee the performance of this LOAD CELLS.

Compared with prior art; the elastic body that the utility model adopts stainless steel material to make; reach the seal membrane that is covered with the stainless steel material making of welding in the strain ga(u)ge outside; when environmental baseline is when reaching than strong electromagnetic than severe corrosive; the components and parts of LOAD CELLS inside can be protected; and can normally carry out weighing, guarantee weighing precision.

Description of drawings

Fig. 1 is the front view (seal membrane part) of the utility model embodiment one.

Fig. 2 is the front view (seal membrane part) of the utility model embodiment two.

Fig. 3 is the front view (seal membrane part) of the utility model embodiment three.

Fig. 4 is that the A-A of Fig. 1 and Fig. 2 is to cut-open view.

Fig. 5 is that the B-B of Fig. 3 is to cut-open view.

Fig. 6 is the front view of the goblet seal membrane of Fig. 1 and Fig. 2.

Fig. 7 is that the C-C of Fig. 6 is to cut-open view.

Fig. 8 is the front view of the cylinder seal membrane of Fig. 3.

Fig. 9 is that the D-D of Fig. 8 is to cut-open view.

Specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Fig. 1 is a kind of LOAD CELLS of the utility model embodiment one, comprise elastic body 1a that stainless steel material makes, stick on the strain ga(u)ge 2 on the elastic body 1a, and the Wheatstone bridge that connects strain ga(u)ge 2, strain ga(u)ge 2 outsides also are covered with the seal membrane 3a of the stainless steel material making of welding; This elastic body 1a is shaped as rectangular parallelepiped, and its both sides respectively are shaped on two blind hole 4a, and the blind hole 4a of both sides correspondence is for being provided with in opposite directions, as Fig. 4; Described blind hole 4a pastes 2 sheet resistance strainometers 2 in the bottom, and the strain ga(u)ge 2 of this stickup concerns four arms making Wheatstone bridge respectively according to the position, constitutes a Wheatstone bridge circuit; Sealing diaphragm 3a can be goblet, and corresponding with the aperture of blind hole 4a, so that the positiver sealing welding, shown in Fig. 6,7; Its other both sides then are shaped on 2 round tube hole 5a, so that install and use.By the blind hole 4a that is shaped on in the mode of its bottom adhering resistance strainometer 2, and also be covered with the seal membrane 3a of welding in the outside, can play effective protective action to strain ga(u)ge 2, in anticorrosion, anti-electromagnetic interference (EMI) effect, also can avoid the direct radiation of high temperature.For further improving its intensity and performance, elastic body 1a and seal membrane 3a adopt through the heat treated stainless steel material of height.For cooperating this elastic body 1a to be shaped as the LOAD CELLS of rectangular parallelepiped, 2 wire grid orientations of each strain ga(u)ge of both sides are mutually 90 degree.Put like this and design, can solve LOAD CELLS preferably because of being corroded or electromagnetic interference (EMI) than strain ga(u)ge 2 under the radiation of forceful electric power magnetic, thereby make resistance strain weighing transducer because of the corrosion or electromagnetic interference (EMI) cause bigger weighing error and zero point drift, make the effect of the electromagnetic radiation of all directions that come from the outside obtain offsetting, the assurance LOAD CELLS is reliablely and stablely worked.

Fig. 2 is a kind of LOAD CELLS of the utility model embodiment two, and elastic body 1b is shaped as the rectangular parallelepiped of a step, and its both sides respectively are shaped on two blind hole 4a, and the blind hole 4a of both sides correspondence is for being provided with in opposite directions; Described blind hole 4a pastes 2 sheet resistance strainometers 2 in the bottom, as shown in Figure 4; Its other both sides are positioned at and then are shaped on 2 round tube hole 5a on the described step; This LOAD CELLS contour structures is slightly different with embodiment one, its ultimate principle such as embodiment one.

Fig. 3 is a kind of LOAD CELLS of the utility model embodiment three, comprise elastic body 1c that stainless steel material makes, stick on the strain ga(u)ge 2 on the elastic body 1c, and the Wheatstone bridge that connects strain ga(u)ge 2, strain ga(u)ge 2 outsides also are covered with the seal membrane 3c of the stainless steel material making of welding; This elastic body 1c is shaped as the I-shaped body, and this I-shaped body middle part is shaped on two parallel surfaces, as shown in Figure 5; Respectively paste 2 sheet resistance strainometers 2 on two parallel surfaces, the strain ga(u)ge 2 of this stickup concerns four arms making Wheatstone bridge respectively according to the position, constitutes a Wheatstone bridge circuit; Then be shaped on 2 round tube hole 5c on the sidewall at this I-shaped body middle part; More than such design can reduce environment than under the radiation of forceful electric power magnetic to the weighting error that directly causes of strain ga(u)ge 2.Use for the LOAD CELLS that cooperates this elastic body 1c to be shaped as the I-shaped body, seal membrane 3c adopts the cylinder of hollow, and lateral surface is shaped on corrugated body in it, shown in Fig. 8,9.In order to increase the effect of anticorrosion, anti-electromagnetic interference (EMI).For further improving its intensity and performance, elastic body 1c and seal membrane 3c adopt through the heat treated stainless steel material with antiseptic property of height.For cooperating elastic body 1c to be shaped as the LOAD CELLS of I-shaped body, 2 wire grid orientations of each strain ga(u)ge of above-mentioned either side are mutually 0 degree.Put like this and design, effect as embodiment one, can solve LOAD CELLS preferably because of being corroded or electromagnetic interference (EMI) than strain ga(u)ge 2 under the radiation of forceful electric power magnetic, thereby make resistance strain weighing transducer overcome because of the corrosion or electromagnetic interference (EMI) cause bigger weighing error and zero point drift, make the effect of the electromagnetic radiation of all directions that come from the outside obtain offsetting, the assurance LOAD CELLS is reliablely and stablely worked.

This LOAD CELLS can be applicable to the dynamometry in industry anticorrosions such as chemical industry, food, medicine and health, the anti-electromagnetic interference (EMI) operation and weighs.

Though the utility model illustrates and describes by the reference preferred embodiment,, those skilled in the art should understand, and can do the various variation on form and the details in the scope of claims.

Claims

1. LOAD CELLS, comprise elastic body (1) that stainless steel material makes, stick on the strain ga(u)ge (2) on the elastic body (1), and the Wheatstone bridge that connects strain ga(u)ge (2), it is characterized in that: described strain ga(u)ge (2) outside is covered with the seal membrane (3) of the stainless steel material making of welding mutually.

2. a kind of LOAD CELLS according to claim 1 is characterized in that: described elastic body (1) be shaped as rectangular parallelepiped, its both sides respectively are shaped at least one blind hole, and the blind hole of both sides correspondence is to be provided with in opposite directions; 2 or 4 sheet resistance strainometers (2) are pasted in described blind hole bottom; Its other both sides then are shaped at least 2 round tube holes.

3. a kind of LOAD CELLS according to claim 1 is characterized in that: the rectangular parallelepiped that is shaped as a step of described elastic body (1), and its both sides respectively are shaped at least one blind hole, and the blind hole of both sides correspondence is for being provided with in opposite directions; 2 or 4 sheet resistance strainometers (2) are pasted in described blind hole bottom; Its other both sides are positioned at and then are shaped at least 2 round tube holes on the described step surface.

4. a kind of LOAD CELLS according to claim 1, it is characterized in that: described elastic body (1) be shaped as the I-shaped body, this I-shaped body middle part is shaped on two parallel surfaces, respectively pastes 1 or 2 sheet resistance strainometers (2) on two parallel surfaces, then is shaped on 1 or 2 round tube hole on the sidewall at this I-shaped body middle part.

5. according to claim 2 or 3 described a kind of LOAD CELLS, it is characterized in that: described seal membrane (3) is a goblet.

6. a kind of LOAD CELLS according to claim 4 is characterized in that: described seal membrane (3) is the cylinder of hollow, and lateral surface has corrugated body in it.