CN217683472U

CN217683472U - Reversing valve assembly of hydraulic breaking hammer

Info

Publication number: CN217683472U
Application number: CN202221576392.2U
Authority: CN
Inventors: 刘振威
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-10-28
Anticipated expiration: 2032-06-22

Abstract

The utility model discloses a reversing valve assembly of a hydraulic breaking hammer, which comprises a valve seat, a valve core, a valve cover and a valve cover core, wherein a cavity is arranged in the valve seat, one side of the cavity is open, and the valve cover is fixedly arranged on the side surface of the valve seat and seals the opening of the cavity; the case is located in the cavity, the case is in can remove repeatedly in the cavity, realize the switching-over function, the case is the tube-shape, the inside circulation passageway that is equipped with of case, the circulation passageway with the cavity communicates with each other, the case outer wall is equipped with the arc depressed part, the arc depressed part is cyclic annular and is located the middle part of case. The valve core in the design bears the reversing function, the structure of the reversing assembly is simplified, the quality of the reversing assembly is increased, the reversing speed is slowed down, and the impact on the valve cover is reduced.

Description

Reversing valve assembly of hydraulic breaking hammer

Technical Field

The utility model relates to the technical field of mechanical equipment, specifically be a reversing valve assembly of hydraulic breaking hammer.

Background

The hydraulic breaking hammer reversing valve assembly generally comprises a reversing assembly, a valve seat, a valve core and a valve cover, and is an important component of the hydraulic breaking hammer. The cooperation of switching-over valve assembly and well cylinder body, piston enables the inside high-low pressure of hydraulic breaking hammer and switches, reaches the effect that the piston lasts constantly strikes the drill rod.

When the hydraulic breaking hammer works normally, the piston strikes the drill rod, and a large shock wave is formed by the high-pressure and low-pressure switching cavity in the rebound process after collision. The shock wave has great pressure to impact the valve cover, and the valve cover is stressed on one side to form a lever effect, so that the valve cover screw is easily broken and even oil leaks.

When the reversing assembly reverses to open the channel of the normal-pressure channel and the channel of the high-pressure and low-pressure switching hole, due to the fact that the instantaneous pressure difference is large, the flow speed of hydraulic oil is too high, the reversing assembly opens the high-pressure channel and is partially swollen, the reversing assembly cannot normally work, and the valve core and the valve seat are galling, so that the reversing assembly is damaged.

When the mass of the reversing assembly of the hydraulic breaking hammer is small, the reversing speed of the reversing assembly is high, the reversing assembly impacts the valve core to cause rebounding after reversing is completed, the rebounding distance is large, the reversing assembly can be caused to repeatedly open and close the connection of the oil return channel and the high-low pressure switching cavity, and then the hydraulic breaking hammer is caused to be abnormally struck.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a switching-over valve assembly of hydraulic pressure quartering hammer, the structure is simpler and easier, merges case and switching-over subassembly into a case part, has increased the quality of switching-over function spare, has slowed down the switching-over speed, has reduced the bounce-back after the switching-over, has increased valve gap core part, when valve gap core wearing and tearing damage, can maintain through changing the valve gap core, makes installation and maintenance more convenient. When the switching-over subassembly high-low pressure switches the chamber and forms very strong pressure, pressure strikes the valve gap core, reduces the atress of valve gap screw, reduces to avoid the fracture of valve gap screw, increases the life of valve gap screw.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a reversing valve assembly of a hydraulic breaking hammer comprises a valve seat, a valve core, a valve cover and a valve cover core, wherein a cavity is arranged in the valve seat, one side of the cavity is provided with an opening, and the valve cover is fixedly arranged on the side surface of the valve seat and seals the opening of the cavity;

the valve core is positioned in the cavity and can move repeatedly in the cavity, the valve core is cylindrical, a circulation channel is arranged in the valve core and is communicated with the cavity, an arc-shaped depressed part is arranged on the outer wall of the valve core and is annular and positioned in the middle of the valve core, a normal high-pressure cavity, a high-low pressure switching cavity and an oil return cavity are formed between the valve core and the valve seat, the high-low pressure switching cavity is positioned in the middle of the valve seat, a thickening protruding part is arranged on the inner wall of the valve core and is cylindrical, and the interior of the thickening protruding part is communicated with the circulation channel;

the valve cover core is located between the valve core and the valve seat, the valve cover core is cylindrical, an outer side limiting groove is formed in the inner wall of the valve seat, an inner side limiting groove is formed in the outer wall of the valve core, the outer portion of the valve cover core is located in the outer side limiting groove, and the inner portion of the valve cover core is located in the inner side limiting groove.

Preferably, the valve seat is further provided with an oil injection channel, the oil injection channel is communicated with the high-low pressure switching cavity, and the oil injection channel is an inclined channel with a certain inclination angle.

Further preferably, two sides of the thickened protruding part and the valve core form a chamfer design.

Further preferably, the valve cover is fixedly mounted on the valve seat through a valve cover screw.

Further preferably, a fixing bolt is arranged at the top of the valve seat.

Further preferably, the valve cover is provided with a plurality of flange holes.

Further preferably, both sides of the valve seat are provided with side wings.

Further preferably, a plurality of connecting holes are formed in the side wings.

(III) advantageous effects

The utility model provides a reversing valve assembly of hydraulic breaking hammer possesses following beneficial effect:

1. this design has changed the mid portion from the right flank with the high-low pressure switching hole that disk seat and well cylinder body are connected, and when the chamber forms very strong pressure is switched to the switching-over valve high-low pressure, the case is strikeed to pressure rather than the valve gap, and this pressure can not pass through lever principle and transmit the valve gap this moment to reduce the atress of valve gap screw, subtract and avoid the fracture of valve gap screw, increase the life of valve gap screw.

2. The arc design is adopted at the position where the valve core opens the normal-pressure cavity and the high-pressure and low-pressure switching cavity, so that the circulating area can be effectively increased, and the over-fast flow rate can be inhibited.

3. This design has adopted the chamfer design in case inside, will take place the position thickening of swelling originally, lets the case can bear bigger impact force and pressure.

4. The valve core and the reversing assembly are combined into a valve core component, so that the quality of the reversing functional part is increased, the reversing speed is reduced, and the rebound after reversing is reduced.

5. The valve core in the design bears the reversing function, the structure of the reversing assembly is simplified, the quality of the reversing assembly is increased, the reversing speed is slowed down, and the impact on the valve cover is reduced.

6. The valve gap that this design was integrative among the prior art sets up changes into two parts of valve gap and valve gap core, when valve gap core wearing and tearing damage, can maintain through changing the valve gap core, makes installation and maintenance more convenient. When the high-low pressure switching cavity of the reversing valve forms strong pressure, the pressure impacts the valve cover core, and at the moment, the valve cover core is of an independent structure, so that the pressure cannot be transmitted to the valve cover through the lever principle, stress of a valve cover screw is reduced, and the valve cover screw is prevented from being broken.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the valve seat structure of the present invention;

fig. 3 is a schematic view of the valve core structure of the present invention;

fig. 4 is a schematic view of the structure of the valve cover of the present invention;

fig. 5 is a schematic structural view of a valve cover core of the present invention;

fig. 6 is a schematic overall appearance of the present invention;

fig. 7 is an overall outline view of the present invention;

in the figure: 1. a valve seat; 2. a valve core; 3. a valve cover; 4. a valve cap core; 5. a cavity; 6. an arc-shaped recess; 7. a normal pressure cavity; 8. a high-low pressure switching cavity; 9. an oil return cavity; 10. a signal aperture; 11. an outer side limiting groove; 12. an inner side limiting groove; 13. thickening the protrusion; 14. fixing the bolt; 15. a flange hole; 16. a flow-through channel; 17. an oil injection channel; 18. a side wing; 19. and connecting the holes.

Detailed Description

The technical solution 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 some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a switching-over valve assembly of hydraulic breaking hammer, including disk seat 1, case 2, valve gap 3 and

valve gap core

4, 1 top of disk seat is equipped with fixing

bolt

14, 1 both sides of disk seat all are equipped with flank 18, be equipped with a plurality of connecting holes 19 on the flank 18, be equipped with a cavity 5 in the

disk seat

1, 5 one side openings of cavity, valve gap 3 fixed mounting seals the opening of cavity 5 in the side of disk seat 1, valve gap 3 passes through valve gap screw fixed mounting on disk seat 1, valve gap 3 is equipped with a plurality of flange holes 15.

The valve core 2 is positioned in the cavity 5 and can move repeatedly in the cavity to realize the reversing function, the valve core and the reversing assembly are combined into one component in the embodiment, the overall structure of the reversing valve assembly is simpler, the quality of the reversing functional part is improved, the reversing speed is slowed down, and the rebound after reversing is reduced. Case 2 is the tube-shape, case 2 inside is equipped with circulation passageway 16, circulation passageway 16 communicates with each other with

cavity

5, 2 outer walls of case are equipped with arc depressed part 6, arc depressed part 6 is cyclic annular and is located case 2 middle part, this embodiment has adopted the arc design in case 2 position of opening normal high pressure chamber 7 and high-low pressure switching chamber 8, can the effectual area that increases the circulation, in order to restrain too fast velocity of flow, the flow of guide hydraulic oil that can be better, reduce the impact of shock wave to case 2.

Form normal high pressure chamber 7 between case 2 and the disk seat 1, high low pressure switches the chamber 8, return oil chamber 9, high low pressure switches the middle part that the chamber 8 is located disk seat 1, this embodiment has changed the middle part from the right side with the high low pressure that disk seat 1 and well cylinder body are connected switches the chamber 8, when high low pressure switches the chamber and forms very strong pressure, pressure strikes case 2 rather than valve gap 3, at this moment, this pressure can not transmit for valve gap 3 through lever principle, thereby reduce the atress of valve gap screw, avoid the fracture of valve gap screw, increase the life of valve gap screw.

2 inner walls of case are equipped with thickening protruding portion 13, and thickening protruding portion 13 is the tube-shape, and thickening protruding portion 13 is inside to communicate with each other with circulation passageway 16, and this embodiment will originally take place the position thickening of swelling, lets case 2 can bear bigger impact force and pressure, and thickening protruding portion both sides form the chamfer design with case 2, can guide the flow direction of hydraulic oil, reduces the impact force to case 2.

Valve gap core 4 is located between case 2 and the disk seat 1, and valve gap core 4 is the tube-shape, and 1 inner wall of disk seat is equipped with

outside spacing groove

11, and 2 outer walls of case are equipped with inboard spacing groove 12, and valve gap core 4 outside is located outside spacing groove 11, and valve gap core 4 inside is located inboard spacing groove 12. When the valve cover core 4 is worn and damaged, the valve cover core 4 can be replaced for maintenance, so that the installation and the maintenance are more convenient. When the high-low pressure switching cavity 8 forms strong pressure, the pressure impacts the valve cover core 4, and at the moment, because the valve cover core 4 is of an independent structure, the pressure cannot be transmitted to the valve cover 3 through the lever principle, so that the stress of a valve cover screw is reduced, and the valve cover screw is prevented from being broken.

The valve seat 1 is also provided with an oil filling channel 17, the oil filling channel 17 is communicated with the high-low pressure switching cavity 8, and the oil filling channel 17 is an inclined channel with a certain inclination angle. The oil injection channel 17 of the high-low pressure switching cavity 8 of the valve seat 1 is changed from a common vertical channel to an inclined channel, so that the impact of shock waves generated by collision on the valve core 2 can be reduced, and the service life of the valve core 2 is prolonged.

The implementation principle is as follows: when the piston is at the lower end, the hydraulic pressure in the signal hole 10 is at low pressure, the valve core 2 in the reversing valve assembly is at the right side, the high-low pressure switching cavity 8 is communicated with the oil return channel and is in a low-pressure state, and the piston gradually rises at the moment.

When the piston rises to a certain degree, the pressure in the signal hole 10 is increased, the valve core 2 is driven by hydraulic pressure to move leftwards, the valve core 2 opens the channels of the normal-pressure cavity 7 and the high-pressure and low-pressure switching cavity 8 and closes the connection between the oil return channel and the high-pressure and low-pressure switching cavity 8, the pressure in the high-pressure and low-pressure switching cavity 8 is changed from low pressure to normal pressure, and the downward movement of the piston is influenced by the change.

When the piston moves downwards to a certain degree, the pressure in the signal hole 10 is converted into low pressure, the valve core 2 moves rightwards, the channels of the normal high pressure cavity 7 and the high and low pressure switching cavity 8 are closed, the connection between the oil return channel and the high and low pressure switching cavity 8 is opened, the pressure in the high and low pressure switching cavity 8 is converted into low pressure from high pressure, the state returns to the initial state, and the process is repeated in a circulating mode.

In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a switching-over valve assembly of hydraulic pressure quartering hammer which characterized in that:

the valve comprises a valve seat, a valve core, a valve cover and a valve cover core, wherein a cavity is arranged in the valve seat, one side of the cavity is provided with an opening, and the valve cover is fixedly arranged on the side surface of the valve seat and seals the opening of the cavity;

2. The reversing valve assembly of a hydraulic demolition hammer as set forth in claim 1, wherein: the valve seat is also provided with an oil injection channel, the oil injection channel is communicated with the high-low pressure switching cavity, and the oil injection channel is an inclined channel with a certain inclination angle.

3. The reversing valve assembly of a hydraulic demolition hammer as set forth in claim 1, wherein: and two sides of the thickened protruding part and the valve core form a chamfer design.

4. The reversing valve assembly of a hydraulic demolition hammer as set forth in claim 1, wherein: the valve cover is fixedly installed on the valve seat through a valve cover screw.

5. The reversing valve assembly of a hydraulic demolition hammer as set forth in claim 1, wherein: and a fixing bolt is arranged at the top of the valve seat.

6. The reversing valve assembly of a hydraulic demolition hammer as set forth in claim 1, wherein: the valve cover is provided with a plurality of flange holes.

7. The reversing valve assembly of a hydraulic demolition hammer as set forth in claim 1, wherein: and side wings are arranged on two sides of the valve seat.

8. The reversing valve assembly of a hydraulic demolition hammer as set forth in claim 7, wherein: the side wings are provided with a plurality of connecting holes.