CN203519249U - Design of sealing and connecting structure with no damage to taper-pipe thread for pressure sensor - Google Patents

Design of sealing and connecting structure with no damage to taper-pipe thread for pressure sensor Download PDF

Info

Publication number
CN203519249U
CN203519249U CN201320640762.9U CN201320640762U CN203519249U CN 203519249 U CN203519249 U CN 203519249U CN 201320640762 U CN201320640762 U CN 201320640762U CN 203519249 U CN203519249 U CN 203519249U
Authority
CN
China
Prior art keywords
thread
sensor
taper
design
transition joint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201320640762.9U
Other languages
Chinese (zh)
Inventor
庞启国
吴廷兵
王先荣
李健锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Silian Measurement & Control Technology Co Ltd
Original Assignee
Chongqing Silian Measurement & Control Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Silian Measurement & Control Technology Co Ltd filed Critical Chongqing Silian Measurement & Control Technology Co Ltd
Priority to CN201320640762.9U priority Critical patent/CN203519249U/en
Application granted granted Critical
Publication of CN203519249U publication Critical patent/CN203519249U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to a design of a sealing and connecting structure with no damage to a taper-pipe thread for a pressure sensor. At first, an O-shaped seal ring is placed in a sealing groove of a clamping tool, and then a transition joint is screwed into a sensor interface till the shoulder surface of the transition joint is attached to the outer end surface of the sensor. At last, the pressure sensor is rotated, so as to drive the transition joint to be screwed into a threaded hole of the clamping tool till the transition joint is screwed up. In the design, the process connection and the sealing structure of the pressure sensor are changed, a clamping tool end of the transition joint is provided with a cylindrical external thread, a sensor end is provided with a corresponding thread according to the thread of a sensor interface, a proper gap is employed for cooperating with the size, and the minor diameter of the thread of the clamping tool end is greater than the maximum external diameter of the thread of the sensor end, thereby forming a shoulder on the joint surface of the two threads, and preventing the transition joint and the sensor interface from being screwed unboundedly in case of thread damage. Meanwhile, the transition joint can be screwed into the threaded hole of the clamping tool to any depth, and the attaching of the outer end surface of the sensor and the outer end surface of a clamping tool interface.

Description

The design of pressure transducer taper-thread not damaged Hermetical connecting structure
Technical field
The process connection of the pressure transducer that it is taper-thread that the utility model relates to for procedural interface and the design of hermetically-sealed construction, fundamental purpose is that the process connection that guarantees pressure transducer can not be damaged the sealing of high pressure and its screw thread, belongs to clamp field.
Background technology
Pressure transducer is in industrial automatic control field, to apply more a kind of measuring element, is especially usually used in the field tests of hydrodynamic pressure.Its process joint is generally Taper Pipe or straight tube internal thread or external thread, as M20 * 1.5, G1/2, NPT1/2, NPT1/4 etc.Sealing for taper-thread adopts the directly mode of engagement of internal and external threads conventionally, and higher by measuring pressure, screw thread will be revolved tightlyer, so usually can cause screw thread damage.Through carefully analyzing and test discovery, the reason of screw thread damage due to internal and external threads, unrestrictedly even tear and cause mutually by extruding, interlock.Because pressure transducer all needs applied voltage test before dispatching from the factory, the situation of taper-thread damage is more, and this is unacceptable for user.Therefore the mode of being tightly connected that, is necessary double thread is improved.
In order to prevent taper-thread damage, do not adopt the directly sealing means of engagement of internal and external threads, and adopt screw thread end face to add the sealing means of O RunddichtringO, being threaded of sensor procedural interface adopts appropriate clearance fit.Because the quantity screw thread specification large, procedural interface of testing pressure sensor is more, thereby the specification of testing required crossover sub is also more, test fixture is changed frequent, therefore, adopt the fixture mode separated with crossover sub, test different sensors and only need to change different crossover subs, greatly saved manpower, saved the trouble of changing fixture.
Usual way is to adopt two O RunddichtringOs to seal, a sealing for pressure transducer and crossover sub, and another is for the sealing of fixture and crossover sub, and its shortcoming is that O RunddichtringO demand is more, and leakage point is more, assembles also cumbersome.
Summary of the invention
In order to overcome the taper-thread damage in test and use procedure of existing pressure transducer, test fixture is changed frequent, and the more deficiency of leakage point, and the utility model provides a kind of design of pressure transducer taper-thread not damaged Hermetical connecting structure.
Utility model solves the technical scheme that its technical matters adopts: an O RunddichtringO is only used in being tightly connected of each pressure transducer, is arranged in the seal groove on the outer face of fixture internal thread interface; The two ends of crossover sub are full screw thread, its fixture end is cylinder external thread, its sensor side is processed into corresponding screw thread by the screw thread of sensor interface, and adopt suitable clearance fit size, fixture end screw thread path is greater than sensor side screw thread maximum outside diameter, thereby form shoulder on two screw thread interfaces, having prevented that crossover sub and sensor interface from unrestrictedly screwing causes screw thread damage, crossover sub can screw in any degree of depth in fixture threaded hole simultaneously, does not disturb pressure sensor interface outer face and fixture interface outer face to be adjacent to; The process assembling is, first in the seal groove of fixture, put into O RunddichtringO, then crossover sub is screwed in sensor interface until its circular bead surface and the laminating of sensor outer face, rotational pressure sensor drives crossover sub to screw in the threaded hole of fixture again, until pressure sensor interface outer face and the laminating of fixture interface outer face, finally by certain moment, screw, this has just formed a complete Hermetical connecting structure.
During described crossover sub design, fixture end screw thread path is greater than sensor side screw thread maximum outside diameter, thereby forms shoulder on two screw thread interfaces, prevents that crossover sub from excessively screwing in pressure sensor interface.
Between the taper-thread of described crossover sub and the taper-thread of sensor, it is clearance fit.
Described crossover sub fixture end screw thread is cylinder external thread, and its path is greater than sensor side screw thread maximum outside diameter, makes it can be screwed into any degree of depth in fixture threaded hole.
Described pressure transducer process is sealed into butt-end packing, only needs an O type circle, and leakage point is few, and assembling is simple.
The beneficial effects of the utility model are, by changing, the process of pressure transducer connects and the design of hermetically-sealed construction, the two ends of crossover sub are full screw thread, its fixture end is cylinder external thread, its sensor side is processed into corresponding screw thread by the screw thread of sensor interface, and adopt suitable clearance fit size, fixture end screw thread path is greater than sensor side screw thread maximum outside diameter, thereby form shoulder on two screw thread interfaces, having prevented that crossover sub and sensor interface from unrestrictedly screwing causes screw thread damage, crossover sub can screw in any degree of depth in fixture threaded hole simultaneously, do not disturb pressure sensor interface outer face and fixture interface outer face to be adjacent to.Its another beneficial effect is, an O type circle is only used in being tightly connected of each pressure transducer, and leakage point reduces by half, and seals more reliable.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation
Fig. 2 is crossover sub structural drawing
In figure, 1 is clamp body, 2 O-ring seals, and 3 is crossover sub.
Embodiment
In Fig. 1, O-ring seal 2 is installed to clamp body 1, crossover sub 3 is tightened on pressure transducer, then rotational pressure sensor drives crossover sub 3 to screw in clamp body until tighten.
It is emphasized that: above Fig. 1, Fig. 2 are only examples of the present utility model, process joint can be Taper Pipe or straight tube internal thread or external thread, as M20 * 1.5, G1/2, NPT1/2, NPT1/4 etc., any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above example, all still belong in the scope of technical solutions of the utility model.

Claims (4)

1. the design of pressure transducer taper-thread not damaged Hermetical connecting structure, it is characterized in that: by clamp body, O-ring seal and crossover sub, formed, crossover sub one end is straight thread, and the other end is the screw thread corresponding with sensor interface screw thread, only with an O RunddichtringO sealing.
2. the design of pressure transducer taper-thread not damaged Hermetical connecting structure according to claim 1 is: during crossover sub design, fixture end screw thread path is greater than sensor side screw thread maximum outside diameter, thereby forms shoulder on two screw thread interfaces.
3. the design of pressure transducer taper-thread not damaged Hermetical connecting structure according to claim 1 is: crossover sub can screw in any degree of depth in fixture threaded hole, does not disturb pressure sensor interface outer face and fixture interface outer face to be adjacent to.
4. the design of pressure transducer taper-thread not damaged Hermetical connecting structure according to claim 1 is: between the taper-thread of crossover sub and the taper-thread of sensor, be clearance fit.
CN201320640762.9U 2013-10-17 2013-10-17 Design of sealing and connecting structure with no damage to taper-pipe thread for pressure sensor Active CN203519249U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320640762.9U CN203519249U (en) 2013-10-17 2013-10-17 Design of sealing and connecting structure with no damage to taper-pipe thread for pressure sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320640762.9U CN203519249U (en) 2013-10-17 2013-10-17 Design of sealing and connecting structure with no damage to taper-pipe thread for pressure sensor

Publications (1)

Publication Number Publication Date
CN203519249U true CN203519249U (en) 2014-04-02

Family

ID=50378167

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320640762.9U Active CN203519249U (en) 2013-10-17 2013-10-17 Design of sealing and connecting structure with no damage to taper-pipe thread for pressure sensor

Country Status (1)

Country Link
CN (1) CN203519249U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105699785B (en) * 2014-12-02 2018-11-06 恩德莱斯和豪瑟尔分析仪表两合公司 Sensor and method for manufacturing the sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105699785B (en) * 2014-12-02 2018-11-06 恩德莱斯和豪瑟尔分析仪表两合公司 Sensor and method for manufacturing the sensor

Similar Documents

Publication Publication Date Title
CN203463833U (en) Sealing assembly for butt-joint of high-temperature high-pressure gas pipelines
CN203336086U (en) Right-angle connector assembly of engine pipeline
CN205960558U (en) Split type drum connection structure
CN203531777U (en) High-quality airtight seal oil casing threaded joint
CN203881486U (en) Self-sealing type pressure gage joint
CN203519249U (en) Design of sealing and connecting structure with no damage to taper-pipe thread for pressure sensor
CN202928755U (en) Device for testing seepage of non-return valve
CN201246554Y (en) Corrugated tube joint
CN203036135U (en) Pressure detection joint ball seal structure
CN105628306B (en) Leakage tester blocking component
CN209510284U (en) A kind of measurable well head connection sealer of pressure
CN203614947U (en) Engine joint component
CN103471772A (en) Sealing device for end parts of pipe
CN210141900U (en) Sealed ultrasonic transducer
CN203517075U (en) Pipeline connecting assembly
CN202900259U (en) Simple oil well casing string pressure testing device
CN207609876U (en) A kind of pressure measurement pipe clamp
CN205479948U (en) Sealed casing cap
CN210269040U (en) High-efficient water pressure test fixture
CN105135099B (en) Secondary seal, the water pipe rapid movable connector with retainer ring
CN215726521U (en) Pipeline pressure sensor
CN204330233U (en) Valve hermetic seal test joint assembly
CN203870303U (en) Joint box cable quick-sealing assembly
CN202256027U (en) Sealing device of water-jacket-method hydrostatic testing machine for gas cylinders with long pipes
CN203857139U (en) Multi-wire leading device for high-pressure vessel

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant