CN201092862Y - Single-body hydraulic supporter exhaust valve - Google Patents

Abstract

The utility model discloses a single-body hydraulic supporter exhaust valve, wherein a step through-hole is made on an sealing end cover, a spring cap is mounted on the upper portion of the through-hole, a filter screen, a filter screen tie-plate and an upper spring are mounted in the lumen of the spring cap, wherein the upper spring is contacted with a steel ball through a push-rod of the lower end, a packing ring and a limited sleeve are mounted on the upper position of the steel ball, a lower spring and a fixed thread sleeve are mounted on the lower position, since the elasticity of the upper spring is stronger than that of the lower spring, the exhaust valve is opened in normal condition, air in cylinder can be automatically exhausted when a movable column is lifted, and the steel ball is lifted by medium under the effect of cylinder intrinsic pressure after the air is exhausted out, the medium can not flow out and pollute the air when the exhaust valve is cut off. the exhaust valve has the advantages of ensuring no air in the cylinder, guarantee the steady of support loads of the supporter, and entering of dust and sand into the cylinder is effectively avoided by the filter screen.

Description

The hydraulic prop outlet valve

Technical field

The utility model relates to a kind of mining equiment, specifically refers to be used on the mine individual hydraulic prop discharging the outlet valve of cylinder body air.

Background technology

Mine individual hydraulic prop is the general main suspension device of adopting of colliery high gear, also is the visual plant that ensures Safety of Coal Mine Production.It is big to have the lifting stroke, and lifting force is big, the safety factor advantages of higher is widely used.Hydraulic prop needs the air in the emptying cylinder body when initial the use, prop up in addition and lean on the long-term supporting in the down-hole, also air can occur in its cylinder body.On present most of hydraulic prop cylinder body outlet valve is not installed all, can only air is discharged flat time of hydraulic prop from triple-use valve during exhaust.Though the pillar that has has been installed outlet valve, be subjected to its structural limitations, the switching sensitivity of valve is low, and the air discharging is thorough inadequately, causes to have air in the cylinder body, makes the lifting force of pillar not reach design parameters, and the supporting carrying is unstable, has a strong impact on downhole safety production.

In addition, existing outlet valve is not installed filter screen on its steam vent, and subsurface environment is abominable, and dust in air, sand grains enter cylinder body by steam vent, cause medium pollution, reduces the application life of hydraulic prop.

Summary of the invention

The invention provides a kind of hydraulic prop outlet valve, described outlet valve comprises spring compressor, push rod, steel ball, joint ring, fixedly swivel nut and upper and lower spring.Spring compressor is fixed on the upper end of end cover, and the spring compressor upper end makes steam vent.Filter screen is installed in the upper end of spring compressor endoporus, and the filter screen backing plate is installed in the lower end of filter screen.The upper spring epimere is installed in the bottom of filter screen backing plate, and hypomere is installed in the stepped hole top of end cover.Push rod upper surface contact upper spring, the lower surface contacts with steel ball.Fixedly swivel nut is installed in the bottom of end cover.Fixedly lower spring is installed in the swivel nut bottom, and steel ball is installed on top.The bellmouth orifice that the joint ring lower end makes contacts with steel ball, and stop collar is installed in the upper end.The steel wire diameter of upper spring is greater than the steel wire diameter of lower spring, and the diameter of bore of lower spring is less than the diameter of steel ball.Make 2-6 steam vent on the great circle cylinder on push rod top.The endoporus periphery of stop collar is made 2-4 steam vent that passes through mutually with endoporus.

The utility model is realized with following technical scheme: a kind of hydraulic prop outlet valve, comprise that sliding fit is installed in post alive in the hydraulic prop cylinder inner bore, is fixed on the top cover on the external cylindrical surface of post alive upper end, be fixed on the end cover in the endoporus of post alive upper end, be installed in the outlet valve in the end cover centre bore; It is characterized in that: described outlet valve comprises spring compressor, push rod, steel ball, joint ring, fixedly swivel nut and last lower spring; Described spring compressor by the lower end flange and some screw in the upper end of end cover centre bore, center, spring compressor upper end makes steam vent; The disc filter screen is installed in the upper end of spring compressor endoporus, and center filter screen backing plate with holes is installed in the lower end of filter screen; Described upper spring epimere is installed in the bottom of filter screen backing plate, and hypomere is installed in the top of the stepped hole of end cover; The lower surface of the push rod upper surface contact upper spring that described T shape cylinder is shaft-like, the lower surface contacts with steel ball; Described fixedly swivel nut is installed in the screwed hole of end cover bottom by external screw thread; Fixedly lower spring is installed in swivel nut stepped hole bottom, and steel ball is installed on top; The bellmouth orifice that described joint ring lower end makes contacts with steel ball, and stop collar is installed in the joint ring upper end.

Described upper spring lower spring is cylindrical stage clip; The spring steel wire cross section diameter of described upper spring is greater than the spring steel wire cross section diameter of lower spring.

The diameter of bore of described lower spring is less than the diameter of steel ball.

Make 2-6 steam vent on the great circle cylinder on described push rod top; The endoporus periphery of described stop collar is made 2-4 steam vent that passes through mutually with endoporus.

Good effect of the present utility model is:

1, hydraulic prop before use, when living the post lifting, because the elastic force of upper spring is greater than lower spring, the steel ball outlet valve is in opening, when the post lifting was lived in the cylinder body fluid injection, the air in the cylinder body can be discharged through steam vent automatically.Along with the rising of pressing in the cylinder, and behind the elastic force greater than upper spring, the medium in the cylinder body lifts steel ball runs into sealing ring, exhaust valve closure, and medium can not overflow and pollute environment.

2, on the outlet valve filter screen is installed, is avoided outside dust, sand grains to enter cylinder body, avoid reducing the application life of hydraulic prop because of medium is unclean.

Description of drawings

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the utility model structural representation;

Fig. 2 is the A-A sectional drawing of Fig. 1;

Fig. 3 is the B-B sectional drawing of Fig. 1.

Among the figure: 1, top cover, 2, the post of living, 3, end cover, 4, spring compressor, 4-1, steam vent, 5, filter screen, 5-1, filter screen backing plate, 6, upper spring, 7, screw, 8, push rod, 8-1, steam vent, 9, stop collar, 9-1, steam vent, 10, joint ring, 11, steel ball, 12, lower spring, 13, fixing swivel nut, 13-1, steam vent.

The specific embodiment

As Fig. 1, Fig. 2, shown in Figure 3, a kind of hydraulic prop outlet valve, comprise that sliding fit is installed in post alive 2 in the hydraulic prop cylinder inner bore, is fixed on the top cover 1 on the post 2 upper end external cylindrical surfaces alive, be fixed on the end cover 3 in the post 2 upper end endoporus alive, be installed in the outlet valve in end cover 3 centre bores; It is characterized in that: described outlet valve comprises spring compressor 4, push rod 8, steel ball 11, joint ring 10, fixedly swivel nut 13 and last lower spring 6,12; Described spring compressor 4 by the lower end flange and some screw in the upper end of end cover 3 centre bores, center, spring compressor 4 upper end makes steam vent 4-1; Disc filter screen 5 is installed in the upper end of spring compressor 4 endoporus, and center filter screen backing plate 5-1 with holes is installed in the lower end of filter screen 5; Described upper spring 6 epimeres are installed in the bottom of filter screen backing plate 5-1, and hypomere is installed in the top of the stepped hole of end cover 3; The lower surface of the push rod 8 upper surfaces contact upper spring 6 that described T shape cylinder is shaft-like, the lower surface contacts with steel ball 11; Described fixedly swivel nut 13 is installed in the screwed hole of end cover 3 bottoms by external screw thread; Fixedly lower spring 12 is installed in swivel nut 13 stepped hole bottoms, and steel ball 11 is installed on top; The bellmouth orifice that described joint ring 10 lower ends make contacts with steel ball 11, and stop collar 9 is installed in joint ring 10 upper ends.

Described upper spring 6 lower springs 12 are cylindrical stage clip; The spring steel wire cross section diameter of described upper spring 6 is greater than the spring steel wire cross section diameter of lower spring 12.

The diameter of bore of described lower spring 12 is less than the diameter of steel ball 11.

Make 2-6 steam vent 8-1 on the great circle cylinder on described push rod 8 tops; The endoporus periphery of described stop collar 9 is made 2-4 steam vent 9-1 that passes through mutually with endoporus.

As Fig. 1, Fig. 2, shown in Figure 3, under normal circumstances, steel ball 11 is exhaust valve opening under the acting in conjunction of last lower spring 6,12.When living 1 lifting of post 2 top covers, the air in the cylinder body is through steam vent 13-1, steam vent 9-1, and steam vent 8-1 steam vent 4-1 discharges automatically, guarantees the operate as normal of hydraulic prop, and supporting load is stable, guarantees supporting safety.The discharging of air in cylinder body finishes, and the high-pressure medium in the cylinder body overcomes the elastic force of upper spring 6, steel ball 11 is shifted onto with joint ring 3 contact, and exhaust valve closure at this moment, medium can not flow out external and contaminated environment.

As shown in Figure 1, the filter screen 5 that install on spring compressor 4 tops prevents that effectively machine outer dust, sand grains from entering cylinder body by outlet valve, guarantees the pure of medium, guarantees pillar application life effectively.The effect of filter screen backing plate 5-1 is to prevent upper spring compressing filter screen 5.

Claims (4)

1. hydraulic prop outlet valve, comprise that sliding fit is installed in post alive (2) in the hydraulic prop cylinder inner bore, is fixed on the top cover (1) on the external cylindrical surface of post alive (2) upper end, be fixed on the end cover (3) in the endoporus of post alive (2) upper end, be installed in the outlet valve in end cover (3) centre bore; It is characterized in that: described outlet valve comprises spring compressor (4), push rod (8), steel ball (11), joint ring (10), fixedly swivel nut (13) and last lower spring (6), (12); Described spring compressor (4) by the lower end flange and some screw in the upper end of end cover (3) centre bore, center, spring compressor (4) upper end makes steam vent (4-1); Disc filter screen (5) is installed in the upper end of spring compressor (4) endoporus, and center filter screen backing plate (5-1) with holes is installed in the lower end of filter screen (5); Described upper spring (6) epimere is installed in the bottom of filter screen backing plate (5-1), and hypomere is installed in the top of the stepped hole of end cover (3); The lower surface of push rod (8) the upper surface contact upper spring (6) that described T shape cylinder is shaft-like, the lower surface contacts with steel ball (11); Described fixedly swivel nut (13) is installed in the screwed hole of end cover (3) bottom by external screw thread; Fixedly lower spring (12) is installed in swivel nut (13) stepped hole bottom, and steel ball (11) is installed on top; The bellmouth orifice that described joint ring (10) lower end makes contacts with steel ball (11), and stop collar (9) is installed in joint ring (10) upper end.

2. hydraulic prop outlet valve according to claim 1 is characterized in that: described upper spring (6) lower spring (12) is cylindrical stage clip; The spring steel wire cross section diameter of described upper spring (6) is greater than the spring steel wire cross section diameter of lower spring (12).

3. hydraulic prop outlet valve according to claim 1 is characterized in that: the diameter of bore of described lower spring (12) is less than the diameter of steel ball (11).

4. hydraulic prop outlet valve according to claim 1 is characterized in that: make 2-6 steam vent (8-1) on the great circle cylinder on described push rod (8) top; The endoporus periphery of described stop collar (9) is made 2-4 steam vent (9-1) that passes through mutually with endoporus.

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