CN216382030U - Hydraulic lifting control device for mining machine - Google Patents

Abstract

The utility model discloses a hydraulic lifting control device for a mining machine, which comprises a long cover and a valve body main body, wherein the long cover is arranged on one side of the valve body main body. The hydraulic lifting control device for the mining machine is provided with a main valve core, as shown in an attached drawing 4, the position of the main valve core is adjusted, hydraulic oil enters a port C, the lift valve is opened by the oil pressure, the oil flows through a channel opened by the main valve core, flows out from the port A to enter a lifting port, flows through a lifting cylinder to enter a port B, flows through a multi-way unloading valve, flows out from a port D by the main valve core to flow to a lifting and disc braking cooling oil tank, when the main valve core is controlled to be in a keeping position, the oil enters the port C, flows out from the port E by the main valve core to enter an oil cooling disc braking multi-way block to supplement the cooling oil, the main valve core blocks the oil from flowing into and out of a carriage lifting cylinder, the piston of a valve body is kept in place, and the problem that the piston cannot be conveniently positioned is solved.

Description

Hydraulic lifting control device for mining machine

Technical Field

The utility model relates to the technical field of mining machine components, in particular to a hydraulic lifting control device for a mining machine.

Background

The special hydraulic lifting device is needed to be adopted in the machinery for mining, so that ore can be conveyed, but the control device of the existing hydraulic lifting device for the mining machine still has some defects in use, the piston in the cylinder body cannot be conveniently positioned in use, and oil cooling brake cooling oil cannot be automatically supplemented, so that the defects provided above are solved by the novel hydraulic lifting control device for the mining machine.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a hydraulic lifting control device for a mining machine, which aims to solve the problem that a piston in a cylinder body cannot be conveniently positioned in use in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a hydraulic lifting control device for a mining machine comprises a long cover and a valve body main body, wherein the long cover is arranged on one side of the valve body main body, a first annular ring is movably connected to one side inside the long cover, a plastic plug is movably connected to the top end of the long cover, and a plurality of groups of inner hexagonal screws are movably connected inside the long cover;

the utility model discloses a long cover of extension valve, including long cover, extension valve core, extension rod.

Preferably, the other side swing joint of valve body main part has short cover, one side swing joint inside the short cover has the third annular ring, one side swing joint of third annular ring has first retaining ring, one side swing joint of first retaining ring has the second annular ring, short cover and plastics end cap constitute swing joint, short cover and interior hexagonal screw constitution swing joint.

Preferably, the top end of the valve body main body is movably connected with a one-way valve, the inside of the one-way valve is movably connected with a first spring, the outside of the first spring is movably connected with a valve body screw, the top end inside the valve body screw is provided with a second retaining ring, and the bottom end of the second retaining ring is movably connected with a fourth annular ring.

Preferably, the one end swing joint at valve body main part top has first end cap, the top of first end cap is provided with the end cover, the inside swing joint of end cover has the second end cap, the bottom swing joint of end cover has fifth annular ring, the top swing joint of end cover has multiunit hexagon socket head cap bolt, hexagon socket head cap bolt runs through the end cover and constitutes swing joint with the valve body main part, one side swing joint on valve body main part top has the second end cap, the top swing joint of second end cap has sixth annular ring, the top end swing joint of sixth annular ring has the top oil plug, the top oil plug constitutes swing joint with the valve body main part.

Preferably, one end of the top of the valve body main body is movably connected with a square valve body, the top end of the square valve body is movably connected with a plurality of groups of outer hexagon bolts, the square valve body is movably connected with a fifth annular ring, the square valve body is movably connected with a plastic plug, the outer hexagon bolts are movably connected with the valve body main body, one end of the square valve body is movably connected with an inner valve sleeve, the inner valve sleeve is movably connected with two groups of third retaining rings, one end of each third retaining ring is movably connected with a seventh annular ring, one end of the inner valve sleeve is movably connected with a pressure reducing valve piston, the pressure reducing valve piston is movably connected with a second spring, one end of the second spring is movably connected with an overflow valve plate, one end of the outer part of the second spring is movably connected with a pressure reducing valve seat, and two ends of the outer part of the pressure reducing valve seat are respectively movably connected with a plurality of fourth retaining rings, the one end swing joint of fourth retaining ring has eighth annular ring, the one end swing joint of relief pressure valve disk seat has the spring holder ball valve, the one end swing joint of spring holder ball valve has the third spring, the outside of interior valve barrel is provided with the air-vent valve connecting seat, the air-vent valve connecting seat constitutes swing joint with the valve body main part, the outside swing joint of air-vent valve connecting seat has ninth annular ring, the one end swing joint of air-vent valve connecting seat has the pressure regulating case, the one end swing joint of pressure regulating case has fifth retaining ring, the one end swing joint of fifth retaining ring has tenth annular ring, the outside swing joint of pressure regulating case has the air-vent valve barrel, the outside one end swing joint of pressure regulating case has hexagon nut, the one end swing joint of pressure regulating case has rubber protective sleeve.

Preferably, two sides of the top of the valve body main body are respectively movably connected with a group of upper rubber gaskets, the top end of each upper rubber gasket is movably connected with an upper sealing cover, the top end of each upper sealing cover is movably connected with a plurality of groups of mounting bolts, the mounting bolts penetrate through the upper sealing covers and the upper rubber gaskets to be movably connected with the valve body main body, one end of the valve body main body is movably connected with a side rubber gasket, one end of the side rubber gasket is movably connected with a side sealing cover, one end of the side sealing cover is movably connected with a plurality of groups of fixing bolts, the fixing bolts penetrate through the side sealing covers to be movably connected with the side rubber gaskets, one side of the top end of the valve body main body is movably connected with a bolt, the top end of the bolt is movably connected with a pressure regulating valve screw, the pressure regulating valve screw is movably connected with the valve body main body, and the outside of the pressure regulating valve screw is movably connected with a sixth retaining ring, the bottom end of the sixth check ring is movably connected with an eleventh annular ring, and the pressure regulating valve screw is movably connected with the first spring.

Compared with the prior art, the utility model has the beneficial effects that: the hydraulic lifting control device for the mining machine not only can quickly position the piston in the cylinder body, but also can automatically supplement cooling oil;

(1) by providing a main valve spool and a valve body, as shown in FIG. 4, when the lift control handle valve is moved to the "lift" position, the position of a main valve core in a valve body is changed, hydraulic oil enters a port C, a poppet valve is opened by oil pressure, oil flows through a channel opened by the main valve core, flows out from the port A to enter a lifting port of a lifting cylinder, returns flowing from the lifting cylinder to enter a port B, flows through a channel opened by the main valve core by a multi-way unloading valve, flows out from the port D to a lifting and disc braking cooling oil tank, and controls the main valve core to enter the port C and flow through the main valve core when the main valve core is in a keeping position, the oil flows out of the connector E and enters an oil-cooled disc brake multi-path block to supplement cooling oil for the oil-cooled disc brake, and the main valve core blocks the oil from flowing into and out of a carriage lifting cylinder to keep the piston of the valve body in place;

(2) through arranging the main valve core and the valve body, as shown in figure 4, the lifting control handle is moved to a 'floating' position, the main valve core is moved to a position of the valve body, a carriage can fall by the dead weight, hydraulic oil enters a port 'C', when the carriage falls, oil in the lifting cylinder flows out of a port 'E' through the valve body and flows to an oil cooling disc braking multi-path block to supplement oil cooling braking cooling oil, when the carriage falls, the oil flows out of the lifting cylinder, enters a port 'A' and flows through a channel opened by the valve body, flows out of a port 'D' and flows to a lifting and disc braking cooling box, when the carriage falls, the supplement oil flows around the port 'B' and flows out of the port 'B' to supplement the lifting cylinder, the lifting control handle is moved to a falling position, the main valve core in the valve body enables the hydraulic oil to enter the control port 'C', the hydraulic oil pressure opens a lift valve, and the oil passes through the channel opened by the main valve core, the oil flows out of the interface B to the multi-way unloading valve, flows through the multi-unloading valve to reach the falling interface of the lifting cylinder, enters the interface A from the lifting cylinder of the compartment, flows through the channel opened by the main valve core, flows out of the interface D and reaches the compartment and the disc brake cooling oil tank.

Drawings

FIG. 1 is a schematic illustration of an explosive structure according to the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic top view of the present invention;

fig. 4 is a schematic diagram of the internal principle of the present invention.

In the figure: 1. a hexagon socket head cap screw; 2. a long cover; 3. a plastic plug; 4. a first annular ring; 5. an extension spool; 6. a large spring seat; 7. a first small spring seat; 8. an extension rod large spring; 9. an extension rod small spring; 10. a second small spring seat; 11. fixing the spacer bush; 12. a first retainer ring; 13. a second annular ring; 14. a main valve element; 15. a valve body main body; 16. a third annular ring; 17. a short hood; 18. a one-way valve; 19. a first spring; 20. a fourth annular ring; 21. a second retainer ring; 22. a valve body screw; 23. a first plug; 24. a fifth annular ring; 25. an end cap; 26. a second plug; 27. a hexagon socket head cap screw; 28. a sixth annular ring; 29. a top oil plug; 30. a square valve body; 31. an outer hexagon bolt; 32. a third retainer ring; 33. a seventh annular ring; 34. an inner valve housing; 35. a pressure reducing valve piston; 36. a second spring; 37. an overflow valve plate; 38. a fourth retainer ring; 39. an eighth annular ring; 40. a pressure reducing valve seat; 41. a spring seat ball valve; 42. a third spring; 43. a pressure regulating valve connecting seat; 44. a ninth annular ring; 45. a tenth annular ring; 46. a fifth retainer ring; 47. a pressure regulating valve core; 48. a pressure regulating valve housing; 49. a hexagonal nut; 50. a rubber protective sleeve; 51. an upper opening rubber gasket; 52. sealing the upper opening; 53. installing a bolt; 54. a side rubber gasket; 55. a side cover; 56. fixing the bolt; 57. a pressure regulating valve screw; 58. a sixth retainer ring; 59. an eleventh annular ring; 60. and (4) a bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1: referring to fig. 1-4, a hydraulic lifting control device for a mining machine comprises a long cover 2 and a valve body main body 15, wherein the long cover 2 is arranged on one side of the valve body main body 15, a first annular ring 4 is movably connected to one side inside the long cover 2, a plastic plug 3 is movably connected to the top end of the long cover 2, and a plurality of groups of inner hexagonal screws 1 are movably connected inside the long cover 2;

an extension valve core 5 is movably connected inside the long cover 2, a large spring seat 6 is movably connected to one side outside the extension valve core 5, a first small spring seat 7 is movably connected inside the large spring seat 6, an extension rod large spring 8 is movably connected outside the extension valve core 5, an extension rod small spring 9 is arranged inside the extension rod large spring 8, a second small spring seat 10 is movably connected to one side of the extension rod small spring 9, a large spring seat 6 is movably connected outside the second small spring seat 10, a fixed spacer 11 is movably connected to one side of the large spring seat 6, a second annular ring 13 is movably connected to one side of the fixed spacer 11, a first check ring 12 is movably connected to one side of the second annular ring 13, and a main valve core 14 is movably connected inside the fixed spacer 11;

the other side of the valve body main body 15 is movably connected with a short cover 17, one side inside the short cover 17 is movably connected with a third annular ring 16, one side of the third annular ring 16 is movably connected with a first check ring 12, one side of the first check ring 12 is movably connected with a second annular ring 13, the short cover 17 is movably connected with a plastic plug 3, and the short cover 17 is movably connected with an inner hexagonal screw 1;

specifically, as shown in fig. 1 and 4, and as shown in fig. 4, when the lift control handle valve is moved to the "lift" position, the position of the main valve core 14 in the valve body 15 is changed, hydraulic oil enters the interface C, the oil pressure opens the poppet valve, oil flows through the channel opened by the main valve core 14, flows out from the interface A to enter the lifting interface of the lifting cylinder, the return oil flowing from the lifting cylinder enters the interface B, flows through the channel opened by the main valve core 14 through the multi-way unloading valve, flows out from the interface D to the lifting and disc braking cooling oil tank, and when the main valve core 14 is controlled to be in the keeping position, the oil enters the interface C and flows through the main valve core 14, and the oil flows out of the joint E and enters the oil-cooled disc brake multi-path block to supplement cooling oil for the oil-cooled disc brake, and the main valve core 14 blocks the oil from flowing into and out of the lifting cylinder of the carriage to keep the piston of the valve body main body 15 in place.

Example 2: the top end of the valve body main body 15 is movably connected with a one-way valve 18, the interior of the one-way valve 18 is movably connected with a first spring 19, the exterior of the first spring 19 is movably connected with a valve body screw 22, the top end of the interior of the valve body screw 22 is provided with a second check ring 21, and the bottom end of the second check ring 21 is movably connected with a fourth annular ring 20;

one end of the top of the valve body main body 15 is movably connected with a first plug 23, the top end of the first plug 23 is provided with an end cover 25, the inside of the end cover 25 is movably connected with a second plug 26, the bottom end of the end cover 25 is movably connected with a fifth annular ring 24, the top end of the end cover 25 is movably connected with a plurality of groups of hexagon socket head bolts 27, the hexagon socket head bolts 27 penetrate through the end cover 25 to be movably connected with the valve body main body 15, one side of the top end of the valve body main body 15 is movably connected with the second plug 26, the top end of the second plug 26 is movably connected with a sixth annular ring 28, the top end of the sixth annular ring 28 is movably connected with a top oil plug 29, and the top oil plug 29 is movably connected with the valve body main body 15;

one end of the top of the valve body main body 15 is movably connected with a square valve body 30, the top end of the square valve body 30 is movably connected with a plurality of groups of outer hexagon bolts 31, the square valve body 30 is movably connected with a fifth annular ring 24, the square valve body 30 is movably connected with a plastic plug 3, the outer hexagon bolts 31 are movably connected with the valve body main body 15, one end of the square valve body 30 is movably connected with an inner valve sleeve 34, the inner part of the inner valve sleeve 34 is movably connected with two groups of third baffle rings 32, one end of the third baffle ring 32 is movably connected with a seventh annular ring 33, one end of the inner valve sleeve 34 is movably connected with a pressure reducing valve piston 35, the inner part of the pressure reducing valve piston 35 is movably connected with a second spring 36, one end of the second spring 36 is movably connected with an overflow valve plate 37, one end of the outer part of the second spring 36 is movably connected with a pressure reducing valve seat 40, and two ends of the outer part of the pressure reducing valve seat 40 are respectively and movably connected with a group of fourth baffle rings 38, one end of the fourth retainer ring 38 is movably connected with an eighth annular ring 39, one end of the pressure reducing valve seat 40 is movably connected with a spring seat ball valve 41, one end of the spring seat ball valve 41 is movably connected with a third spring 42, a pressure regulating valve connecting seat 43 is arranged outside the inner valve sleeve 34, the pressure regulating valve connecting seat 43 is movably connected with the valve body main body 15, a ninth annular ring 44 is movably connected outside the pressure regulating valve connecting seat 43, one end of the pressure regulating valve connecting seat 43 is movably connected with a pressure regulating valve core 47, one end of the pressure regulating valve core 47 is movably connected with a fifth retainer ring 46, one end of the fifth retainer ring 46 is movably connected with a tenth annular ring 45, a pressure regulating valve sleeve 48 is movably connected outside the pressure regulating valve core 47, one end of the outside of the pressure regulating valve core 47 is movably connected with a hexagon nut 49, and one end of the pressure regulating valve core 47 is movably connected with a rubber protective sleeve 50;

two sides of the top of the valve body main body 15 are movably connected with a group of upper rubber gaskets 51 respectively, the top end of the upper rubber gasket 51 is movably connected with an upper sealing cover 52, the top end of the upper sealing cover 52 is movably connected with a plurality of groups of mounting bolts 53, the mounting bolts 53 penetrate through the upper sealing cover 52 and the upper rubber gasket 51 to be movably connected with the valve body main body 15, one end of the valve body main body 15 is movably connected with a side rubber gasket 54, one end of the side rubber gasket 54 is movably connected with a side sealing cover 55, one end of the side sealing cover 55 is movably connected with a plurality of groups of fixing bolts 56, the fixing bolts 56 penetrate through the side sealing cover 55 to be movably connected with the side rubber gasket 54, one side of the top end of the valve body main body 15 is movably connected with a bolt 60, the top end of the bolt 60 is movably connected with a pressure regulating valve screw 57, the pressure regulating screw 57 is movably connected with the valve body main body 15, and the outside of the pressure regulating screw 57 is movably connected with a sixth retainer ring 58, the bottom end of the sixth retainer ring 58 is movably connected with an eleventh annular ring 59, and the pressure regulating valve screw 57 is movably connected with the first spring 19;

specifically, as shown in fig. 1 and 4, as shown in fig. 4, the lift control handle is moved to a "floating" position, the main valve core 14 is moved to a position of the valve body 15, so that the truck bed can fall by its own weight, hydraulic oil enters the interface "C", when the truck bed falls, oil in the lift cylinder flows out of the "E" port through the valve body 15, flows to the oil-cooled disc brake multi-path block, and supplements the oil-cooled brake cooling oil, when the truck bed falls, the oil flows out of the lift cylinder, enters the channel opened by the valve body 15, flows out of the interface "D", flows to the lift and disc brake cooling box, when the truck bed falls, the supplement oil flows around the main valve core 14, flows out of the interface "B", supplements the lift cylinder, moves the lift control handle to the "falling" position, the main valve core 14 in the valve body 15 makes the hydraulic oil enter the control interface "C", the oil pressure opens the lift valve, and the oil passes through the channel opened by the core 14, the oil flows out of the interface B to the multi-way unloading valve, flows through the multi-unloading valve to reach the falling interface of the lifting cylinder, enters the interface A from the lifting cylinder of the compartment, flows through the channel opened by the main valve core 14, flows out of the interface D and reaches the compartment and the disc brake cooling oil tank.

The working principle is as follows: when the utility model is used, firstly, as shown in figure 4, when the lifting control handle valve is moved to the lifting position, the position of the main valve core 14 in the valve body 15 is changed, hydraulic oil enters the interface C, the oil pressure opens the lifting valve, oil flows through the channel opened by the main valve core 14, flows out from the interface A to enter the lifting interface of the lifting cylinder, flows back oil from the lifting cylinder to enter the interface B, flows through the channel opened by the main valve core 14 through the multi-way unloading valve, flows out from the interface D to the lifting and disk braking cooling oil tank, when the main valve core 14 is controlled to be in the keeping position, the oil enters the interface C and flows through the main valve core 14, and the oil flows out of the joint E and enters the oil-cooled disc brake multi-path block to supplement cooling oil for the oil-cooled disc brake, and the main valve core 14 blocks the oil from flowing into and out of the lifting cylinder of the carriage to keep the piston of the valve body main body 15 in place.

Then, as shown in fig. 4, the lifting control handle is moved to the "floating" position, the main valve core 14 is moved to a position of the valve body main body 15, so that the carriage can fall by the self-weight, the hydraulic oil enters the interface "C", when the carriage falls, the oil in the lifting cylinder flows out of the "E" port through the valve body main body 15, flows to the oil-cooled disc brake multi-path block, and supplements the oil-cooled brake cooling oil, when the carriage falls, the oil flows out of the lifting cylinder, enters the interface "a" and flows through the channel opened by the valve body main body 15, flows out of the interface "D", flows to the lifting and disc brake cooling box, when the carriage falls, the supplement oil flows around the main valve core 14, flows out of the interface "B", supplements the lifting cylinder, the lifting control handle is moved to the "falling" position, the main valve core 14 in the valve body main valve body 15 makes the hydraulic oil enter the control interface "C", the oil pressure lift valve opens the lift valve, and the oil flows through the channel opened by the main valve core 14, the oil flows out of the interface B to the multi-way unloading valve, flows through the multi-unloading valve to reach the falling interface of the lifting cylinder, enters the interface A from the lifting cylinder of the compartment, flows through the channel opened by the main valve core 14, flows out of the interface D and reaches the compartment and the disc brake cooling oil tank.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides a hydraulic pressure lifts controlling means for mining machine, includes long cover (2) and valve body main part (15), its characterized in that: a long cover (2) is arranged on one side of the valve body main body (15), a first annular ring (4) is movably connected to one side of the interior of the long cover (2), a plastic plug (3) is movably connected to the top end of the long cover (2), and a plurality of groups of inner hexagonal screws (1) are movably connected to the interior of the long cover (2);

an extension valve core (5) is movably connected inside the long cover (2), a large spring seat (6) is movably connected to one side of the exterior of the extension valve core (5), a first small spring seat (7) is movably connected inside the large spring seat (6), an extension rod large spring (8) is movably connected outside the extension valve core (5), an extension rod small spring (9) is arranged inside the extension rod large spring (8), a second small spring seat (10) is movably connected to one side of the extension rod small spring (9), a large spring seat (6) is movably connected outside the second small spring seat (10), a fixed spacer bush (11) is movably connected to one side of the large spring seat (6), a second annular ring (13) is movably connected to one side of the fixed spacer bush (11), a first check ring (12) is movably connected to one side of the second annular ring (13), the inner part of the fixed spacer bush (11) is movably connected with a main valve core (14).

2. The hydraulic lift control apparatus for a mining machine of claim 1, wherein: the other side swing joint of valve body main part (15) has short cover (17), one side swing joint inside short cover (17) has third annular ring (16), one side swing joint of third annular ring (16) has first retaining ring (12), one side swing joint of first retaining ring (12) has second annular ring (13), short cover (17) constitutes swing joint with plastics end cap (3), short cover (17) and interior hexagonal screw (1) constitute swing joint.

3. The hydraulic lift control apparatus for a mining machine of claim 1, wherein: the top end swing joint of valve body main part (15) has check valve (18), the inside swing joint of check valve (18) has first spring (19), the outside swing joint of first spring (19) has valve body screw (22), the inside top of valve body screw (22) is provided with second retaining ring (21), the bottom swing joint of second retaining ring (21) has fourth ring (20).

4. The hydraulic lift control apparatus for a mining machine of claim 1, wherein: one end of the top of the valve body main body (15) is movably connected with a first plug (23), an end cover (25) is arranged at the top end of the first plug (23), a second plug (26) is movably connected inside the end cover (25), the bottom end of the end cover (25) is movably connected with a fifth annular ring (24), the top end of the end cover (25) is movably connected with a plurality of groups of hexagon socket head cap bolts (27), the inner hexagon bolt (27) penetrates through the end cover (25) to be movably connected with the valve body main body (15), one side of the top end of the valve body main body (15) is movably connected with a second plug (26), the top end of the second choke plug (26) is movably connected with a sixth annular ring (28), the top end of the sixth annular ring (28) is movably connected with a top oil plug (29), the top oil plug (29) is movably connected with the valve body main body (15).

5. The hydraulic lift control apparatus for a mining machine of claim 1, wherein: the one end swing joint at valve body main part (15) top has square valve body (30), the top swing joint of square valve body (30) has outer hexagon bolt (31) of multiunit, square valve body (30) and fifth ring (24) swing joint, square valve body (30) and plastics end cap (3) constitute swing joint, outer hexagon bolt (31) and valve body main part (15) constitute swing joint, the one end swing joint of square valve body (30) has interior valve barrel (34), the inside swing joint of interior valve barrel (34) has two sets of third retaining rings (32), the one end swing joint of third retaining ring (32) has seventh ring (33), the one end swing joint of interior valve barrel (34) has relief valve piston (35), the inside swing joint of relief valve piston (35) has second spring (36), the one end swing joint of second spring (36) has overflow valve block (37), the one end swing joint of second spring (36) outside has relief pressure valve disk seat (40), the outside both ends of relief pressure valve disk seat (40) swing joint have a set of fourth retaining ring (38) respectively, the one end swing joint of fourth retaining ring (38) has eighth ring circle (39), the one end swing joint of relief pressure valve disk seat (40) has spring seat ball valve (41), the one end swing joint of spring seat ball valve (41) has third spring (42), the outside of interior valve barrel (34) is provided with air-vent valve connecting seat (43), air-vent valve connecting seat (43) constitutes swing joint with valve body main part (15), the outside swing joint of air-vent valve connecting seat (43) has ninth ring circle (44), the one end swing joint of air-vent valve connecting seat (43) has pressure regulating valve core (47), the one end swing joint of pressure regulating core (47) has fifth retaining ring (46), one end swing joint of fifth retaining ring (46) has tenth annular ring (45), the outside swing joint of pressure regulating case (47) has pressure regulating valve barrel (48), the outside one end swing joint of pressure regulating case (47) has hexagon nut (49), the one end swing joint of pressure regulating case (47) has rubber protective sleeve (50).

6. The hydraulic lift control apparatus for a mining machine of claim 1, wherein: the improved valve is characterized in that two sides of the top of the valve body main body (15) are respectively and movably connected with a group of upper opening rubber gaskets (51), the top end of each upper opening rubber gasket (51) is movably connected with an upper opening sealing cover (52), the top end of each upper opening sealing cover (52) is movably connected with a plurality of groups of mounting bolts (53), each mounting bolt (53) penetrates through the upper opening sealing cover (52) and the corresponding upper opening rubber gasket (51) to be movably connected with the valve body main body (15), one end of the valve body main body (15) is movably connected with a side surface rubber gasket (54), one end of each side surface rubber gasket (54) is movably connected with a side surface sealing cover (55), one end of each side surface sealing cover (55) is movably connected with a plurality of groups of fixing bolts (56), each fixing bolt (56) penetrates through the corresponding side surface sealing cover (55) to be movably connected with the corresponding side surface rubber gasket (54), one side of the top end of the valve body main body (15) is movably connected with a bolt (60), the top end of the bolt (60) is movably connected with a pressure regulating valve screw (57), the pressure regulating valve screw (57) is movably connected with the valve body main body (15), the outside of the pressure regulating valve screw (57) is movably connected with a sixth retainer ring (58), the bottom end of the sixth retainer ring (58) is movably connected with an eleventh annular ring (59), and the pressure regulating valve screw (57) is movably connected with the first spring (19).

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