CN105043659A - Explosion proof pressure gauge - Google Patents
Explosion proof pressure gauge Download PDFInfo
- Publication number
- CN105043659A CN105043659A CN201510499550.7A CN201510499550A CN105043659A CN 105043659 A CN105043659 A CN 105043659A CN 201510499550 A CN201510499550 A CN 201510499550A CN 105043659 A CN105043659 A CN 105043659A
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- China
- Prior art keywords
- binding post
- watchcase
- binding
- hole
- interference
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Abstract
The invention belongs to the instrument technical field and relates to an explosion proof pressure gauge. The explosion proof pressure gauge comprises a gauge shell; the back surface of the gauge shell is provided with a rear cover; a binding post installation cavity is formed between the rear cover and the gauge shell; a plurality of binding posts are located in the installation cavity and are in clearance fit with mounting holes in the gauge shell; binding post fixing plates are arranged between the binding posts and the gauge shell; limiting holes through which the binding posts can pass are formed in the binding post fixing plates; and the edges of the limiting holes are externally extended, so that positioning holes can be formed; after the binding posts are inserted into the limiting holes, interference channels are formed between the walls of the binding posts and the walls of the positioning holes; and positioning pins are in interference fit with the interference channels, so that the binding posts can be clamped. According to the explosion proof pressure gauge of the invention, contact pressure is generated through utilizing the interference fit of the positioning pins, so that the binding posts can be clamped, and the rotation of the binding posts can be prevented.
Description
Technical field
The invention belongs to field of instrumentation technology.
Background technology
The principle of work of anti-explosion pressure gage is the elastic deformation based on detecting element (bourdon tube in measuring system), make it to drive the contact in electric contact group to produce corresponding action (closed or disconnection) to make the circuit in control pressure system be switched on or switched off by mechanical drive, thus realize the instrument of the object of automatic control alarm and on-the-spot instruction.
The watchcase of anti-explosion pressure gage is for containing and the inherent parts of protective meter part (as movement, dial plate, pointer etc.), in order to the information of instrument is delivered to outside by wire, usually needing termination.Existing termination comprises terminal box and binding post, binding post is positioned at terminal box, binding post comprises cylinder, nut, pad is formed, threaded portion has been opened at cylinder two ends, in the middle of two threaded portions be smooth department (cover has insulation inserts usually), cylinder smooth department and watchcase mounting hole clearance fit, the threaded portion at two ends is furnished with set nut and is fixed on watchcase by whole binding post, the threaded portion that binding post is positioned at terminal box is also provided with the wiring nut for compressing wire, the volume defect of such scheme is: cylinder smooth department and watchcase clearance fit, when set nut gets rusty, thread is destroyed, mismachining tolerances etc. cause the degree of tightening of set nut inadequate, cylinder easily rotates in watchcase mounting hole, affect wiring effect, even wire can be pulled apart time serious.
Summary of the invention
The invention is intended to provide one to prevent the pivotal anti-explosion pressure gage of binding post.
Anti-explosion pressure gage in this programme, comprise watchcase, the watchcase back side is provided with bonnet, binding post installation cavity is formed between bonnet and watchcase, some binding posts be positioned at this installation cavity and with the mounting hole clearance fit on watchcase, binding post fixed head is provided with between binding post and watchcase, this binding post fixed head has the spacing hole passed through for binding post, the hole of this spacing hole is along extending out formation pilot hole, binding post inserts after spacing hole and forms interference duct between its post jamb and hole wall of pilot hole, and register pin and this interference duct interference fit also clamp binding post.
Beneficial effect: when set nut gets rusty, thread is destroyed, when mismachining tolerances etc. cause the degree of tightening of set nut inadequate, binding post easily and watchcase mounting hole relatively rotate, the present invention arranges binding post fixed head between some binding posts and watchcase, binding post first inserts the mounting hole inserting watchcase in the spacing hole on binding post fixed head again, formation pilot hole is extended out at spacing hole, again binding post is inserted in spacing hole, interference duct is formed between binding post post jamb and pilot hole hole wall, the contact that register pin utilizes interference fit to produce after inserting this interference duct blocks binding post, because binding post fixed head and all binding posts are connected to form entirety, when binding post that is single or minority has rotation trend, be subject to the restriction of binding post fixed head, can't rotate.
Further, the number of described binding post is three, and becomes " V " shape to arrange, and binding post fixed head corresponding is with it V shaped slab, and binding post is connected with binding post fixed head, and the rotation of binding post is subject to the restriction of V shaped slab.
Further; described binding post comprises cylinder and insulation inserts; cylinder comprises the right-hand thread portion of left-hand thread portion, middle smooth department, right-hand member; this insulation inserts is interference fitted on the smooth department of cylinder; the left-hand thread portion of binding post is combined with wiring nut, left set nut from left to right successively; the right-hand thread portion of binding post is combined with right set nut; cylinder smooth department arranges insulation see; utilize insulation inserts to run through binding post fixed head, watchcase, can carry out protecting and insulating by pairs of posts smooth department.
Further, between described wiring nut and left set nut, be provided with flat shim, be convenient to left set nut and wiring nut compression wire.
Further, described insulation inserts is rigid plastic insulation inserts, and hardness height is not fragile.
Accompanying drawing explanation
Fig. 1 is the partial sectional view of embodiment of the present invention anti-explosion pressure gage.
Fig. 2 is that partial sectional view is looked on a left side of Fig. 1.
Embodiment
Below by embodiment, the present invention is further detailed explanation:
Reference numeral in Figure of description comprises: watchcase 1, glass surface 2, bonnet 3, binding post 4, wiring nut 41, flat shim 42, left set nut 43, insulation inserts 44, mounting hole 5, binding post fixed head 6, spacing hole 7, pilot hole 8, register pin 9.
Embodiment anti-explosion pressure gage is substantially as shown in accompanying drawing 1, Fig. 2:
Anti-explosion pressure gage, comprise watchcase 1 and glass surface 2, the behind of watchcase 1 is provided with bonnet 3, the installation cavity holding binding post 4 is formed between this bonnet 3 and watchcase 1, three binding posts 4 are installed in installation cavity, three V-shaped arrangements of binding post 4, this watchcase 1 leave three mounting holes 5 run through for binding post 4.
Each binding post 4 comprises cylinder and insulation inserts, and cylinder comprises the right-hand thread portion of left-hand thread portion, middle smooth department, right-hand member, and this insulation inserts is interference fitted on the smooth department of cylinder.The left-hand thread portion of binding post 4 is combined with wiring nut, left set nut from left to right successively, is flat shim between wiring nut and left set nut, and the right-hand thread portion of binding post 4 is combined with right set nut (not drawing right set nut in Fig. 1).The binding post fixed head 6 between the left set nut of binding post 4 and watchcase 1 being, this binding post fixed head 6 is V shaped slab, binding post fixed head 6 has the spacing hole 7 relative with watchcase 1 mounting hole 5.The insulation inserts of each binding post 4 runs through spacing hole 7, mounting hole 5 from left to right successively, and insulation inserts and mounting hole 5 are clearance fit, the more left set nut of cylinder, right set nut are relatively tightened, and binding post 4 is fixed on watchcase 1.
In order to prevent binding post 4 from rotating in spacing hole 7, mounting hole 5, form pilot hole 8 in the hole of spacing hole 7 along extending out, this pilot hole 8 and axis and spacing hole 7 axis being parallel, and pilot hole 8 communicates with spacing hole 7.After insulation inserts inserts pilot hole 8, insulation inserts sidewall and pilot hole 8 hole wall surround the interference duct of inserting for register pin 9, and when register pin 9 inserts in interference duct, the contact that register pin 9 utilizes interference fit to produce blocks insulation inserts.Insulation inserts 44 in the present embodiment adopts ABS plastic part.
The principle of work of the present embodiment is: when set nut get rusty, thread is destroyed, mismachining tolerance etc. causes the degree of tightening of set nut inadequate time, insulation inserts is arranged on binding post fixed head 6 by register pin 9 clamping, binding post fixed head 6 connects not three binding posts 4 on the same line, when any binding post 4 has rotation trend, fixed head can prevent binding post 4 from rotating.
Above-described is only embodiments of the invention, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the prerequisite not departing from structure of the present invention, some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.The protection domain that this application claims should be as the criterion with the content of its claim, and the embodiment in instructions etc. record the content that may be used for explaining claim.
Claims (5)
1. anti-explosion pressure gage, comprise watchcase, the watchcase back side is provided with bonnet, binding post installation cavity is formed between bonnet and watchcase, some binding posts be positioned at this installation cavity and with the mounting hole clearance fit on watchcase, it is characterized in that, binding post fixed head is provided with between binding post and watchcase, this binding post fixed head has the spacing hole passed through for binding post, the hole of this spacing hole is along extending out formation pilot hole, binding post inserts after spacing hole and forms interference duct between its post jamb and hole wall of pilot hole, and register pin and this interference duct interference fit also clamp binding post.
2. anti-explosion pressure gage according to claim 1, is characterized in that: the number of described binding post is three, and becomes " V " shape to arrange, and binding post fixed head corresponding is with it V shaped slab.
3. anti-explosion pressure gage according to claim 2, it is characterized in that: described binding post comprises cylinder and insulation inserts, cylinder comprises the right-hand thread portion of left-hand thread portion, middle smooth department, right-hand member, this insulation inserts is interference fitted on the smooth department of cylinder, the left-hand thread portion of binding post is combined with wiring nut, left set nut from left to right successively, and the right-hand thread portion of binding post is combined with right set nut.
4. anti-explosion pressure gage according to claim 3, is characterized in that: be provided with flat shim between described wiring nut and left set nut.
5. anti-explosion pressure gage according to claim 4, is characterized in that: described insulation inserts is rigid plastic insulation inserts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510499550.7A CN105043659A (en) | 2015-08-15 | 2015-08-15 | Explosion proof pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510499550.7A CN105043659A (en) | 2015-08-15 | 2015-08-15 | Explosion proof pressure gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105043659A true CN105043659A (en) | 2015-11-11 |
Family
ID=54450378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510499550.7A Pending CN105043659A (en) | 2015-08-15 | 2015-08-15 | Explosion proof pressure gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105043659A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424269A (en) * | 2015-12-31 | 2016-03-23 | 天津春华发科技有限公司 | Pipeline pressure gauge |
| CN109114221A (en) * | 2018-08-28 | 2019-01-01 | 西安近代化学研究所 | A kind of pressure vessel conducting device |
| CN112129455A (en) * | 2020-10-09 | 2020-12-25 | 天长市志昊机电配件有限公司 | Manometer shell that possesses heat dissipation function |
-
2015
- 2015-08-15 CN CN201510499550.7A patent/CN105043659A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424269A (en) * | 2015-12-31 | 2016-03-23 | 天津春华发科技有限公司 | Pipeline pressure gauge |
| CN109114221A (en) * | 2018-08-28 | 2019-01-01 | 西安近代化学研究所 | A kind of pressure vessel conducting device |
| CN109114221B (en) * | 2018-08-28 | 2020-10-27 | 西安近代化学研究所 | Pressure vessel switches on device |
| CN112129455A (en) * | 2020-10-09 | 2020-12-25 | 天长市志昊机电配件有限公司 | Manometer shell that possesses heat dissipation function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151111 |
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| WD01 | Invention patent application deemed withdrawn after publication |