CN100425897C

CN100425897C - Modified ball valve for gas cylinder in use for fuel gas automobile

Info

Publication number: CN100425897C
Application number: CNB2006101545843A
Authority: CN
Inventors: 翁国栋; 芮正国
Original assignee: XIANGSHAN VALVES Manufacturing Co Ltd
Current assignee: Ningbo Sunan Valve Manufacture Co.,Ltd.
Priority date: 2006-11-08
Filing date: 2006-11-08
Publication date: 2008-10-15
Anticipated expiration: 2026-11-08
Also published as: CN1959168A

Abstract

An improved ball valve of gas cylinder on fuel-gas automobile is prepared as connecting screw coupled with knob to spool; coupling spool with spool base in relatively rotating seal contact way; coupling spool base with valve body in contact connection way; setting free regulation unit of spool base seal compression level, temperature protection unit, overflow protection unit and leakage protection unit on valve body.

Description

A kind of improved ball valve for gas cylinder in use for fuel gas automobile

Technical field

The present invention relates to other class vehicle body fittings technical field not to be covered, also relate to the ball valve technical field simultaneously, especially relate to valve core case and the adjustable ball valve for gas cylinder in use for fuel gas automobile of valve core chamber seal degree.

Background technique

At present, light passenger train, car class novel gas automobile adopt pressurized gas and liquefied petroleum gas (LPG) gasoline replacing and diesel oil to act as a fuel, and have the advantage that fuel cost is low, pollution emission is few; In order to make the combustion gas energy fast opening and closing in the gas cylinder, general handy gas cylinder ball valve, the spherical sealing configuration of present gas cylinder ball valve, be by being close to the up and down realization that cooperates of sealing seat and the sphere of both sides of spool sphere, in case seal-seating and spool just can't be adjusted after the fixing assembling of overpressure cap, therefore just there are two aspect defectives: the one, the seal compression of sealing seat and spool is decided by mach size fully, want accurate control size, mach tolerance of size must increase the machining difficulty, owing to can cause the seal compression of each valve variant; The 2nd, sealing seat can wear and tear, and along with making increased frequency, sealing seat and valve core chamber can lose seal compression, thereby cause gas leak; Existing gas cylinder ball valve is not provided with the pressure limit protection simultaneously, the temperature over-range protection, and there are defective in overcurrent protection, leak protection function on safe in utilization.

Summary of the invention

The objective of the invention is in order to overcome the deficiency of above-mentioned prior art; a kind of improved ball valve for gas cylinder in use for fuel gas automobile is provided; make it have the pressure limit protection; the temperature over-range protection; overcurrent protection, leak protection and seal compression free adjustment function; make processing and assembling convenient, entrucking is used safer.

For achieving the above object, technological scheme of the present invention is such: a kind of improved ball valve for gas cylinder in use for fuel gas automobile comprises valve body, valve core case, spool, knob, swing arm; Valve core case and spool are in the valve body, it is characterized in that, said valve core case profile is a Rotary-table, two-part up and down by symmetry constitute, the conjunction plane of valve core case and valve body is the conical surface up and down, the big end of valve core case contacts connection with gland, in the circular groove that small end gos deep into being provided with in the valve body, and with a gap is arranged at the bottom of the circular groove, can at the bottom of circular groove, advance under the promotion of gland, the centre is a spherical valve core, and the seal compression can regulate gland that spool cooperates with valve core case moves valve core case, and the conical surface position change that contacts with valve body because of valve core case changes the seal compression that spool cooperates with valve core case; Fix a swing arm on the spool, swing arm stretches out outside the valve body, and the end is connected to knob; Said gland and valve body are spirally connected; Be respectively equipped with pressure protective device and temperature protective device in the rear and front end of valve body; On the air feed duct that valve body connects with gas cylinder, be provided with overvoltage protective device; On the valve body of knob and valve body contacting point, have the little duct of losing heart; the head that is connected with gas cylinder at valve body also has the little duct of losing heart; vent cap in this two little duct and the valve body communicates; the vent cap two ends are arranged side by side with pressure protective device and temperature protective device respectively; lead to outside the car after covering for the available seal closure of an end that does not connect steam line, the gas that leaks is discharged and the atmosphere mixed diluting.

Owing to adopted technique scheme, a kind of improved ball valve for gas cylinder in use for fuel gas automobile of the present invention, because of having the pressure limit protection, the temperature over-range protection, overcurrent protection, leak protection function, entrucking is used safer, also has the seal compression free adjustment function simultaneously, reduced mach difficulty, each valve is wrenched moment with the gland of same setting, has guaranteed the conformity of seal compression; When the increase because of access times has reduced sealing, can be by regulating gland, adjust the seal compression of valve core case and valve core chamber, prevent gas leakage, eliminate accident potential, prolongation product working life.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the A-A sectional view of Fig. 1.

Among the figure: 1; knob, 2; seal ring, 3; gland; 4; valve body, 5; valve core case, 6; valve rod; 7; spool, 8; circular groove, 9; vent cap; 10; the air feed duct, 11; disappointing little duct, 12; disappointing little duct; 13; stuffing box gland, 14; overcurrent protective device, 1401; housing; 1402; spring; 1403; vent, 1404; back-up ring, 1405; moving sheet; 15; pressure protective device; 1501; the pressure security sheet, 16; temperature protective device, 1601; the temperature safety member; 1602; leakage port; 17; seal closure, 18; temperature safety duct, 19; the pressure security duct.

Embodiment

By illustrated in figures 1 and 2, a kind of improved ball valve for gas cylinder in use for fuel gas automobile of the present invention comprises valve body 4, valve core case 5, spool 7, knob 1, swing arm 6; Valve core case and spool are in the valve body, it is characterized in that, said valve core case 5 profiles are Rotary-table, two-part up and down by symmetry constitute, the conjunction plane of valve core case 5 and valve body 4 is conical surfaces up and down, the big end of valve core case contacts connection with gland 3, in the circular groove 8 that small end gos deep into being provided with in the valve body, and with a gap is arranged at the bottom of the circular groove, can at the bottom of circular groove, advance under the promotion of gland, the centre is the spherical valve core 7 that is mated, and the seal compression can regulate gland that spool cooperates with valve core case moves valve core case, and the conical surface position change that contacts with valve body because of valve core case changes the seal compression that spool cooperates with valve core case; Fix a swing arm 6 on the spool 7, swing arm stretches out outside the valve body, and the end is connected to knob 1, is provided with seal ring 2 between this knob and valve body; Said gland and valve body are spirally connected; Be respectively equipped with pressure protective device 15 and temperature protective device 16 in the rear and front end of valve body; On the air feed duct 10 that valve body connects with gas cylinder, be provided with overcurrent protective device 14; On the valve body of knob and valve body contacting point, have the aperture road 11 that loses heart, the head that is connected with gas cylinder at valve body also has the aperture road 12 that loses heart, its outer stuffing box gland 13 that is provided with, vent cap 9 in this two little duct and the valve body communicates, the vent cap two ends are arranged side by side with pressure protective device 15 and temperature protective device 16 respectively, insert in the steam line together with air outlet and vent road junction at pressure protective device 15 or temperature protective device 16 residing valve body one ends, lead to outside the car after covering with seal closure 17 for valve body one end that does not connect steam line, the gas that leaks is discharged and the atmosphere mixed diluting;

Said pressure protective device 15 is on the pressure security duct 19 in valve body pressure security sheet 1501 to be set, and this pressure security sheet is piece, and contacts with the parts of its connection are slick and sly, and said pressure security duct 19 communicates with gas cylinder.When pressure reached setting value, the pressure security sheet was stretched and explosion is lost heart;

Said temperature protective device 16, be on the temperature safety duct 18 in valve body temperature safety member 1601 to be set, said temperature safety duct one end communicates with gas cylinder, the leakage port 1602 that the other end is provided with on temperature safety member and temperature safety duct is connected, temperature safety member 1601 is made by low melting alloy, when temperature reached setting value, the temperature safety member of fusing moved under the promotion of safety duct 18 internal air pressures, and safe duct 18 is connected with leakage port 1602 and lost heart;

Said overcurrent protective device 14, by housing 1401, spring 1402, moving sheet 1405, back-up ring 1404 constitutes, and its guide ring and housing are fixed, and moving sheet is held on the back-up ring, and last pressing spring is established vent 1403 on the moving sheet; When for the pipeline overcurrent, moving sheet moves under the promotion of pressure reduction, near blocking the air vent road junction, reduces air demand, reaches the overcurrent protection purpose.

Claims

1, a kind of improved ball valve for gas cylinder in use for fuel gas automobile comprises valve body (4), valve core case (5), spool (7), knob (1), swing arm (6); The swing arm and the spool that join with knob link; place the interior spool of valve body to be to seal in relative rotation and contact connection with valve core case; form certain seal compression therebetween; valve core case contacts connection with valve body; it is characterized in that: on valve body, also be provided with the free regulating device of valve core case seal compression, pressure protective device (15), temperature protective device (16), overcurrent protective device (14) and protector for leakage.

2, a kind of improved ball valve for gas cylinder in use for fuel gas automobile according to claim 1, it is characterized in that: the free regulating device of said valve core case seal compression, be that valve core case (5) profile is made Rotary-table, this Rotary-table is made of two-part up and down of symmetry, the conjunction plane that contacts of valve core case (5) and valve body (4) is the conical surface up and down, valve core case and valve body can relatively move, the big end of valve core case contacts connection with gland (3) on being screwed onto valve body, in the circular groove that small end gos deep into being provided with in the valve body (8), and with a gap is arranged at the bottom of the circular groove.

3, a kind of improved ball valve for gas cylinder in use for fuel gas automobile according to claim 1, it is characterized in that: said pressure protective device (15) is located at the front end or the rear end of valve body, be on the pressure security duct (19) in valve body pressure security sheet (1501) to be set, this pressure security sheet is piece, and contacts with its parts that are fixedly connected are slick and sly; Said pressure security duct (19) communicates with gas cylinder.

4, a kind of improved ball valve for gas cylinder in use for fuel gas automobile according to claim 1, it is characterized in that: said temperature protective device (16) is located at the rear end or the front end of valve body, be on the temperature safety duct (18) in valve body temperature safety member (1601) to be set, said temperature safety duct one end communicates with gas cylinder, and the leakage port (1602) that the other end is provided with on temperature safety member and temperature safety duct is connected; Temperature safety member (1601) is made by low melting alloy.

5, a kind of improved ball valve for gas cylinder in use for fuel gas automobile according to claim 1; it is characterized in that: said overcurrent protective device (14) is located on the air feed duct (10) of valve body lower end; gas cylinder joint with valve body places in the gas cylinder; it is made of housing (1401), spring (1402), moving sheet (1405), back-up ring (1404); its guide ring and housing are fixed; moving sheet is held on the back-up ring, and last pressing spring is established vent (1403) on the moving sheet.

6, a kind of improved ball valve for gas cylinder in use for fuel gas automobile according to claim 1, it is characterized in that: said protector for leakage, be on the valve body of knob (1) and valve body (4) contacting point, to have the little duct (11) of losing heart, be provided with seal ring (2) between knob and valve body, in the little duct (11) of will losing heart is sealed in; The head that is connected with gas cylinder at valve body also has the little duct (12) of losing heart; its outer stuffing box gland (13) that is provided with; this two little duct communicates with the interior set vent cap (9) of valve body; the vent cap two ends are arranged side by side with pressure protective device (15) and temperature protective device (16) respectively; insert in the steam line together with air outlet and vent road junction at pressure protective device (15) or residing valve body one end of temperature protective device (16), lead to outside the car after covering with seal closure (17) for valve body one end that does not connect steam line.