CN201225938Y - Explosion-proof manometer - Google Patents

Abstract

The utility model relates to an explosion-prevention pressure gauge, which comprises a spring pipe and a spring pipe end enclosure, and is characterized in that the spring pipe end enclosure (4) is provided with a through-hole part (2) that extends into an inner cavity (11) of the Spring pipe and is provided with a styliform peak (21); the peak (21) of the through-hole part (2) points to the transverse inner wall of the Spring pipe inner cavity (11), and the gap (H) between the peak (21) and the spring pipe is 0 to 0.5 mm; the spring pipe end enclosure (4) is an inner end enclosure and is formed by welding a metal rod (3) in the spring pipe inner cavity (11). Compared with the prior art, the pressure gauge has the advantages that the spring pipe end enclosure that is formed by combining cores is changed to be an end enclosure the through-hole part of which is arranged inside the spring pipe, so that the length of the end enclosure in the spring pipe is increased; because the peak of the through-hole part points to the transverse inner wall of the spring pipe inner cavity, and when the input pressure exceeds the rated pressure, the wall of the spring pipe is broken by the peak of the through-hole part when the spring pipe is deformed, so that the gas pressure is released in the designated direction, thereby ensuring the gas pressure flow direction, and preventing the explosion accident caused by the too high gas pressure.

Description

Anti-explosion pressure gage

Technical field

The utility model belongs to a kind of tensimeter, refers in particular to a kind of anti-explosion pressure gage with explosion prevention function.

Background technology

End socket is directly to insert in the bourdon tube with the copper rod that processes to be welded again in the bourdon tube that makes up with movement in the general purpose pressure gauge.When tensimeter is started working, when improper operation or pressure condition and rated condition have error, when input pressure surpasses rated pressure, the gas of circulation carries out pressure release in the most broad weak local explosion in the table, and the direction of pressure release does not have orientation, and the direction of explosion has uncertainty---may be towards the index plane of table to dial plate, also may be towards the back of watchcase, make the explosionproof hole of watchcase inoperative, the handling safety coefficient is low, and is quite dangerous.

Summary of the invention

Technical problem to be solved in the utility model is that a kind of reasonable in design, anti-explosion pressure gage that structure is ingenious and safe in utilization is provided at above-mentioned prior art present situation.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: this anti-explosion pressure gage, include bourdon tube and bourdon tube end socket, it is characterized in that: described bourdon tube end socket is extended with the perforated portion of needle-like cusp in the bourdon tube inner chamber, the cusp of this perforated portion points on the transverse inner wall of bourdon tube inner chamber, and the distance between cusp and the bourdon tube inwall is 0～0.5cm, is preferably 0.2-1mm.

As improvement, described bourdon tube end socket is chosen as interior end socket, inserts the bourdon tube inner chamber through being welded by metal bar.

Improve, described bourdon tube end socket also can be outer end socket again.

Compared with prior art, advantage of the present utility model is to change the bourdon tube end socket of movement combination into be provided with perforated portion in the bourdon tube end socket, the bourdon tube seal head that extended stretches into the interior length of bourdon tube, and point at the cusp of individual needle-like perforated portion on the transverse inner wall of bourdon tube inner chamber, when input pressure surpasses rated pressure, bourdon tube when distortion spring tube wall will perforated portion the cusp bursting, make the direction pressure release of gaseous tension towards regulation, thereby guaranteed the gaseous tension flow direction, stopped the generation that causes an explosion accident because of air pressure is too high.

Description of drawings

Fig. 1 is the structure cut-open view of the utility model embodiment;

Fig. 2 is the side direction outward appearance planimetric map of Fig. 1;

Fig. 3 is the outward appearance planimetric map of Fig. 1;

Fig. 4 is the configuration state synoptic diagram that Fig. 1 middle punch portion cusp pierces through the bourdon tube tube wall.

Embodiment

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

As shown in Figures 1 to 4, the anti-explosion pressure gage of present embodiment, include bourdon tube 1 and bourdon tube end socket 4, described bourdon tube end socket 4 extends into the perforated portion 2 of a band needle-like cusp 21 in the bourdon tube inner chamber 11 at end socket 4 places, the cusp 21 of this perforated portion 2 points on the transverse inner wall of bourdon tube inner chamber 11, and the distance H between cusp 21 and bourdon tube 1 inwall is 0～0.5cm, is preferably 0.2-1mm.Bourdon tube end socket 4 is interior end sockets, inserts bourdon tube inner chamber 11 through being welded by metal bar 3.Certainly bourdon tube end socket 4 is also can be outer end socket, bourdon tube 1 tube wall of distortion can be pierced through as long as extend into a perforated portion 2 in the bourdon tube 1 of end socket 4.

Safety blasting tensimeter structural principle is basic identical with general tensimeter structural principle: include pointer, bourdon tube, bourdon tube seal head, joint and the clamping plate that are connected with joint and be arranged at gear drive on the clamping plate, described bourdon tube one end is connected with the air intake opening of joint, and its other end is connected with gear drive by the bourdon tube seal head.During measurement, when measured medium enters elastic sensing element-bourdon tube inner chamber by interface unit, owing to made the bourdon tube free end produce displacement by the variation of measuring pressure, the pointer rotation of borrowing connecting rod to drive the fan-shaped driving gear end, the corresponding pressure value of indication on scale.In order to eliminate the gap activity between the sector gear shaft gear, on shaft gear, installed the dish type hairspring.

But tensimeter of the present utility model, a of bourdon tube shortens to size when pressure surpasses safe pressure, and b is elongated to size, and the cross sectional shape of bourdon tube changes, and sees shown in Figure 4ly, and the end socket cusp punctures bourdon tube makes pressure reach directed safe unloading pressure.

Claims (4)

1, a kind of anti-explosion pressure gage, include bourdon tube (1) and bourdon tube end socket (4), it is characterized in that: described bourdon tube end socket (4) is extended with the perforated portion (2) of needle-like cusp (21) in bourdon tube inner chamber (11), the cusp (21) of this perforated portion (2) points on the transverse inner wall of bourdon tube inner chamber (11), and the distance H between cusp (21) and bourdon tube (1) inwall is 0～0.5cm.

2, anti-explosion pressure gage according to claim 1 is characterized in that: the distance H between cusp (21) and bourdon tube (1) inwall is 0.2-1mm.

3, anti-explosion pressure gage according to claim 1 is characterized in that: described bourdon tube end socket (4) is interior end socket, inserts bourdon tube inner chamber (11) through being welded by metal bar (3).

4, anti-explosion pressure gage according to claim 1 is characterized in that: described bourdon tube end socket (4) is outer end socket.

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