CN205298706U - Open formula machinery blow -down valve entirely - Google Patents

Abstract

The utility model discloses an open formula machinery blow -down valve entirely, including have valve body with the export of medium runner of medium runner entry, set up the plug screw body on the valve body lateral wall, set up at the valve gap of valve body upper end, disk seat in the valve body cavity of position sleeve in the middle of arranging valve body and valve gap in, fastening, connect the adjusting ring on disk seat upper portion, with the disk seat form the sealed face of carbide the valve clack, install the continuous valve rod of recoil dish on the valve clack, one end and recoil valve snail line and arrange the regulating spring of valve gap inner chamber in. The utility model discloses simple structure, manufacture are convenient, and it is with the help of any external force, but utilize the discharge fluid of specified quantity of the power of medium itself to prevent that system's internal pressure from exceeding the safe operation that protection system equipment and pipeline are come to predetermined safe value.

Description

A kind of complete opening type mechanical discharge valve

Technical field

This utility model belongs to valve field, is specifically related to a kind of peculiar to vessel, military, thermal power station, metallurgy, petrochemical industry, combustion gas etc. and ensures system equipment and the complete opening type mechanical discharge valve of pipeline safety for saturated vapor media feed system.

Background technology

Existing drain valve is generally divided into manually-operated gate and automatic valve, and manually-operated gate general operation is got up comparatively laborious, expends a large amount of manpower, and intelligence degree is not high, it is easy to produce potential safety hazard; Although existing automatic valve is not by any external force; but utilize the power of medium itself to discharge the fluid of load quantity; in case pressure exceedes predetermined safety value to protect the safe operation of system equipment and pipeline in locking system; but in emergency situations; cannot manually carry out pressure in Open valve discharge system by force, bring very big potential safety hazard to the safe operation of system equipment and pipeline.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned a kind of complete opening type mechanical discharge valve of not enough offer.

A kind of complete opening type mechanical discharge valve, including the valve body 1 exporting 1B with medium runner entrance 1A and medium runner, it is arranged on the plug 4 on valve body 1 sidewall, it is arranged on the valve gap 8 of valve body 1 upper end, it is placed in the positioning sleeve 7 in the middle of valve body and valve gap, it is fastened on the valve seat 2 in valve body 1 cavity, it is connected to the adjusting ring 3 on valve seat 2 top, with the flap 6 that valve seat 2 forms sealing surface, it is arranged on the Disc holder 5 on flap 6, valve rod 17 that one end is connected with Disc holder 5 screw thread and the adjustment spring 9 being placed in valve gap 8 inner chamber, it is provided with micrometer adjusting screw 4.1 in described plug 4, on described adjustment spring 9, under be respectively arranged at two ends with upper spring seat 10 and lower spring cup 18, described lower spring cup 18 is arranged in the upper cavity of positioning sleeve 7, described upper spring seat 10 is provided with the adjusting screw rod 15 for regulating spring 9 loading force, described adjusting screw rod 15 is provided with locknut 16. described valve gap 8 upper end is provided with valve bonnet 14, also include transverse link seat 13 and for controlling the manual wrench 11 that transverse link seat 13 moves up and down, one end of described transverse link seat 13 is connected with the cover wall of valve bonnet 14 side by the first straight pin 13.1, the outer wall of described valve bonnet 14 opposite side is provided with the second straight pin 12 hinged with manual wrench 11.

This utility model simple in construction, manufacturing easy to process, it is not by any external force, but utilizes the power of medium itself to discharge the fluid of load quantity, in case pressure exceedes predetermined safety value to protect the safe operation of system equipment and pipeline in locking system. When pressure recovers after normally, valve is again switched off. This valve or a kind of relief valve having both manual function with manual wrench simultaneously, except automatic function, in emergency situations, manually can carry out pressure in Open valve discharge system by force by spanner, a ensures to the safe operation of system equipment and pipeline is separately many.

Accompanying drawing explanation

Fig. 1 is the overall structure schematic diagram under closed mode of the present utility model.

Detailed description of the invention

This utility model is further illustrated below in conjunction with drawings and Examples.

Embodiment: this utility model one complete opening type mechanical discharge valve, including the valve body 1 exporting 1B with medium runner entrance 1A and medium runner, it is arranged on the plug 4 on valve body 1 sidewall, it is arranged on the valve gap 8 of valve body 1 upper end, it is placed in the positioning sleeve 7 in the middle of valve body and valve gap, it is threaded connection the valve seat 2 being fastened in valve body 1 cavity, with the adjusting ring 3 being threaded in valve seat 2 top, with the flap 6 that valve seat 2 forms hard alloy sealing surface, it is arranged on the Disc holder 5 on flap 6, valve rod 17 that one end is connected with Disc holder 5 screw thread and the adjustment spring 9 being placed in valve gap 8 inner chamber, it is provided with micrometer adjusting screw 4.1 in described plug 4, described adjustment spring about 9 is respectively arranged at two ends with upper spring seat 10 and lower spring cup 18, described lower spring cup 18 is arranged in the upper cavity of positioning sleeve 7, described upper spring seat 10 is provided with the adjusting screw rod 15 for regulating spring 9 loading force, described adjusting screw rod 15 is provided with locknut 16. described valve gap 8 upper end is provided with valve bonnet 14, also include transverse link seat 13 and for controlling the manual wrench 11 that transverse link seat 13 moves up and down, one end of described transverse link seat 13 is connected with the cover wall of valve bonnet 14 side by the first straight pin 13.1, the outer wall of described valve bonnet 14 opposite side is provided with the second straight pin 12 hinged with manual wrench 11.

Operation principle of the present utility model is as follows: when system is properly functioning, and by the effect of spring 9 loading force above flap 6, valve is closed; When system pressure increases to over authorized pressure value, medium active force below flap 6 restrains adjustment spring 9 loading force above flap 6 by medium runner entrance 1A makes valve opening, by high pressure by medium runner outlet 1B release, it is prevented that in system, pressure continues to raise; When system pressure reduces to authorized pressure value, flap 6 makes valve be re-closing off under the effect regulating spring 9 loading force, stops medium outflow, keeps system normal safe to run. Opening pressure in the pressure limit inner valve regulating spring 9 regulation is that the loading force changing spring 9 by rotating adjusting screw rod 15 is adjusted, and after adjusting required force value, locks locking by locknut 16; Disc holder 5 on flap 6 can make flap 6 obtain bigger lifting force, at the instantaneous Curtain area obtaining valve opening, it is ensured that valve is quickly opened; Discharge pressure and blowdown of a safety valve, after opening pressure setting, can be adjusted by adjusting ring 3 and micrometer adjusting screw 4.1. In emergency situations, manually can upwards to prize by force transverse link seat 13 by spanner 11, flap 6 and valve seat 2 is driven to disengage rapidly thereby through valve rod 17, thus pressure in Open valve discharge system, to the safe operation of system equipment and pipeline separately many a guarantees.

" six property " of this product is analyzed as follows:

Safety and reliability: valve pressure parts is forge welding structure is good to close property, it is to avoid to adopt the defects such as pore that casting produces, slag inclusion, shrinkage porosite.Forge welding structure intensity is high, and bearing capacity is high. In valve designs, leave and take enough allowances, increase part strength; The Technology for Heating Processing of specification, improves the combination property of material. The margin of safety of design takes 1.5 times of design pressure, guarantees without deformation and leakage, it is ensured that service life was more than 25 years under strength test conditions. This valve or a kind of relief valve having both manual function with manual wrench simultaneously, except automatic function, in emergency situations, manually can carry out pressure in Open valve discharge system by force by spanner, a ensures to the safe operation of system equipment and pipeline is separately many. The sealing of valve pressure-bearing body adopts soft graphite folder nickel wire and fine copper pad, and screw thread compresses; Movement parts adopts high temperature resistant FFKM to seal, by pressure test, No leakage. Opening and closing element is sealed into Si Taili hard alloy, and hardness is high, has shock-resistant, anti scuffing, wear-resisting, cavitation, long service life, can make to also ensure that during valve opening and closing number of times > 200 times the zero leakage of sealing. Reliable and stable seal approach, effectively prevents steam from leaking, it is to avoid personnel come to harm.

Maintainability, protection and testability: the maintainability of valve is critically depend on the reasonability of structure. The damage of valve, the damage mostly being sealing surface causes. Can be seen that from the overall structure schematic diagram closed mode of the present utility model, change sealing pair, only need to dismantle mouth bolt replacing flap, valve seat of back-outing in valve and change. This kind of structure can ensure that maintenance of valve is quick, it is ensured that valve average time for repair of breakdowns MTTR < 1h. Manual wrench on valve is the safety device of valve, can double as again as valve test, can be used to test the interior stagnant residual voltage of valve and run jam.

Environmental suitability: valve is that corrosive medium uses environment, ambient temperature 0 DEG C��60 DEG C; Relative air humidity 95% also has condensation; There are salt fog, mist of oil, mycete; There is inclination and wave; There are vibration, impact. According to handling characteristics, in valve designs, major part material selection super-low carbon stainless steel. This material has acidproof, corrosion resistant, wear-resisting, the temperature-resistance characteristic of excellence, can ensure that valve can adapt to salt fog, mist of oil, mycete preferably and have the working environment of condensation. According to the feature using environment to have vibrations, impact, valve leaves and takes enough allowances in the design, increases part strength; The each parts of valve are chosen degree of precision and are coordinated, mechanically one firm entity of composition; Valve is connected with selection for pipeline bolt, and bonding strength is high, can effectively prevent the vibration of environment, impact.

From above many measures, can ensure that safety, reliability maintainability and supportability, environmental suitability and testability that valve uses, meet valve working condition requirement.

Claims (3)

1. a complete opening type mechanical discharge valve, including the valve body (1) exporting (1B) with medium runner entrance (1A) and medium runner, it is arranged on the plug (4) on valve body (1) sidewall, it is arranged on the valve gap (8) of valve body (1) upper end, it is placed in the positioning sleeve (7) in the middle of valve body (1) and valve gap, it is fastened on the valve seat (2) in valve body (1) cavity, it is connected to the adjusting ring (3) on valve seat (2) top, with the flap (6) that valve seat (2) forms sealing surface, it is arranged on the Disc holder (5) on flap (6), valve rod (17) that one end is connected with Disc holder (5) screw thread and the adjustment spring (9) being placed in valve gap (8) inner chamber, micrometer adjusting screw (4.1) it is provided with in described plug (4), on described adjustment spring (9), under be respectively arranged at two ends with upper spring seat (10) and lower spring cup (18), described lower spring cup (18) is arranged in the upper cavity of positioning sleeve (7), described upper spring seat (10) is provided with the adjusting screw rod (15) for regulating spring (9) loading force, described adjusting screw rod (15) is provided with locknut (16), described valve gap (8) upper end is provided with valve bonnet (14), characterized by further comprising transverse link seat (13) and be used for controlling the manual wrench (11) that transverse link seat (13) moves up and down, one end of described transverse link seat (13) is connected with the cover wall of valve bonnet (14) side by the first straight pin (13.1), the outer wall of described valve bonnet (14) opposite side is provided with the second straight pin (12) hinged with manual wrench (11).

2. complete opening type mechanical discharge valve according to claim 1, it is characterized in that described valve seat (2) is threaded connection and be fastened in valve body (1) cavity, described adjusting ring (3) is threadedly attached in valve seat (2) top.

3. complete opening type mechanical discharge valve according to claim 1 and 2, it is characterised in that form hard alloy sealing surface between described valve seat (2) and flap (6).