CN219197760U - Impact equipment with resistance valve - Google Patents
Impact equipment with resistance valve Download PDFInfo
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- CN219197760U CN219197760U CN202222163930.1U CN202222163930U CN219197760U CN 219197760 U CN219197760 U CN 219197760U CN 202222163930 U CN202222163930 U CN 202222163930U CN 219197760 U CN219197760 U CN 219197760U
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Abstract
The utility model relates to the field of impact equipment, and discloses impact equipment with a resistance valve, which comprises a piston device, wherein the piston device is connected with a reversing valve, the reversing valve is connected with the resistance valve, and the resistance valve changes the connection state of the reversing valve by changing the oil state of a control port. When the oil pressure of the control port is lower, and the acting force of the control port end is smaller than that of the resistance element, the reversing valve is positioned at the left position, and the outlet is communicated with the low-pressure oil port; conversely, the outlet is communicated with the high-pressure oil port, and the impact equipment with the resistance valve is convenient to debug: and adjusting the commutation state of the same power equipment. The pretightening force of the high-pressure spring can be changed by increasing or decreasing the number of the adjusting gaskets, so that the equipment is ensured to be kept in a design state at any time.
Description
Technical Field
The utility model relates to the field of impact equipment, in particular to impact equipment with a resistance valve.
Background
The existing resistance valve is generally a direct-acting type resistance-changing valve, but the existing constant flow valve only has one valve clack, the valve clack directly senses the front and rear differential pressure of the valve, and the action of changing the valve resistance is performed, so that the valve can be a direct-acting type resistance-changing valve, which can not adjust the flow on line, so that the energy-saving operation of changing the total flow can not be implemented by using the constant flow valve, but the resistance of the existing equipment can not be adjusted for different power equipment, and therefore, the impact equipment with the resistance valve is provided.
Disclosure of Invention
(one) solving the technical problems
In view of the shortcomings of the prior art, the present utility model provides an impact device equipped with a resistance valve that solves the above-mentioned problems.
(II) technical scheme
In order to achieve the above purpose, the present utility model provides the following technical solutions: the impact equipment with the resistance valve comprises a piston device, wherein the piston device is connected with a reversing valve, the reversing valve is connected with the resistance valve, and the connection state of the reversing valve is changed by changing the oil state of a control port. When the oil pressure of the control port is lower, and the acting force of the control port end is smaller than that of the resistance element, the reversing valve is positioned at the left position, and the outlet is communicated with the low-pressure oil port; whereas the outlet is communicated with the high-pressure oil port.
Preferably, the piston device comprises a piston, a piston front cavity and a thrust piston, wherein the piston penetrates through the piston front cavity, a piston signal cavity and a piston rear oil cavity are arranged on the pushing end of the piston, the thrust piston is provided with the thrust piston front cavity corresponding to one end of the piston, the tail end of the thrust piston is provided with the thrust piston rear cavity, and the thrust piston signal cavity is arranged on the outer side wall surface of the thrust piston.
Preferably, the piston signal cavity is connected with the reversing valve through the control port, the oil cavity at the rear end of the piston is connected with the reversing valve through the outlet, and the reversing valve is connected with an external pipeline and the front cavity of the piston through the high-pressure port.
Preferably, the resistance valve comprises a resistance valve front cavity II and a slide valve, the resistance valve front cavity I is arranged on the resistance valve front cavity II, an adjusting gasket is arranged in the slide valve, a high-pressure spring is arranged on one side of the adjusting gasket, the resistance valve applies rated resistance to oil return in the return process of the piston, a braking effect is achieved on the piston, and the adjusting gasket is used for fine adjustment of pretightening force of the resistance valve.
Preferably, a resistance element is arranged on one side of the reversing valve.
Preferably, the reversing valve is connected with the first drag valve front cavity through a low pressure port.
Preferably, the resistance element may employ spring force or small plunger hydraulic force, etc.
(III) beneficial effects
Compared with the prior art, the utility model provides the impact equipment with the resistance valve, which has the following beneficial effects:
1. the impact equipment with the resistance valve is convenient to debug: and adjusting the commutation state of the same power equipment. The pretightening force of the high-pressure spring can be changed by increasing or decreasing the number of the adjusting gaskets, so that the equipment is ensured to be kept in a design state at any time.
2. The impact equipment with the resistance valve has wide application model range: resistance is adjustable for different power devices. The resistance valve can adjust the resistance by changing the spring stiffness or the pretightening force so as to meet the reversing braking requirements of different power devices, and the reversing mode can be used by large and small power machine types; the thrust piston can adjust the acting area of the rear cavity to realize reversing adjustment of different power devices.
3. The impact equipment with the resistance valve is stable and reliable in adjustment of the resistance valve. The compression force F=k is delta X, wherein the elastic stiffness is only related to the characteristics of the spring, the compression amount can be set through the position of the oil return port, and the compression amount can be set as required and does not change along with the impact process, so the resistance is stable and controllable.
4. According to the impact equipment with the resistance valve, due to the existence of the resistance valve, the possibility of negative pressure in each cavity is reduced, cavitation erosion probability is effectively reduced, and the service life of parts is prolonged.
Drawings
FIG. 1 is a schematic view of the initial state of the structure of the present utility model;
FIG. 2 is a schematic diagram of the opening of the resistance valve according to the present utility model;
FIG. 3 is a schematic diagram showing the closing of a piston signal chamber in accordance with the present utility model;
FIG. 4 is a schematic illustration of the contact of the piston with the thrust piston in accordance with the present utility model;
FIG. 5 is a schematic diagram of a thrust piston signal chamber of the present utility model communicating with a rear end oil chamber of a piston;
FIG. 6 is a schematic diagram of the reduction in piston speed of the present utility model;
FIG. 7 is a schematic view of the forward movement of the piston of the present utility model;
FIG. 8 is a schematic diagram of a broken piston signal chamber of the thrust piston signal chamber of the present utility model;
FIG. 9 is a schematic view of the thrust piston of the present utility model reaching a forward limit position;
FIG. 10 is a schematic diagram of high-pressure oil in the piston signal chamber of the present utility model;
FIG. 11 is a schematic diagram showing the completion of the reversing valve from the piston to the impact point in accordance with the present utility model;
FIG. 12 is a schematic view of a reversing valve of the present utility model;
FIG. 13 is a schematic view of a structural resistance valve of the present utility model;
in the figure: 1. a piston; 2. a piston front chamber; 3. a piston signal chamber; 4. an oil cavity at the rear end of the piston; 5. an outlet; 6. a control port; 7. a high pressure port; 8. a low pressure port; 9. a thrust piston signal chamber; 10. a thrust piston rear chamber; 11. a thrust piston; 12. A thrust piston front chamber; 13. a reversing valve; 14. a first drag valve front cavity; 15. a slide valve; 16. a high-pressure spring; 17. a resistance element; 18. adjusting the gasket; 19. and a resistance valve front cavity II.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-13, an impact device with a resistance valve includes a piston device, the piston device is connected with a reversing valve 13, the reversing valve 13 is connected with a resistance valve, and the resistance valve changes the connection state of the reversing valve by changing the oil state of a control port. When the oil pressure of the control port is lower, and the acting force of the control port end is smaller than that of the resistance element, the reversing valve is positioned at the left position, and the outlet is communicated with the low-pressure oil port; whereas the outlet is communicated with the high-pressure oil port.
Further, the piston device comprises a piston 1, a piston front cavity 2 and a thrust piston 11, wherein the piston 1 penetrates through the piston front cavity 2, a piston signal cavity 3 and a piston rear oil cavity 4 are arranged at the pushing end of the piston 1, a thrust piston front cavity 12 is arranged at one end of the thrust piston 11 corresponding to the piston 1, a thrust piston rear cavity 10 is arranged at the tail end of the thrust piston 11, and a thrust piston signal cavity 9 is arranged on the outer side wall surface of the thrust piston 11.
Further, the piston signal cavity 3 is connected with a reversing valve 13 through a control port 6, the oil cavity 4 at the rear end of the piston is connected with the reversing valve 13 through an outlet 5, and the reversing valve 13 is connected with an external pipeline and the piston front cavity 2 through a high-pressure port 7.
Further, the resistance valve comprises a resistance valve front cavity II 19 and a slide valve 15, the resistance valve front cavity II 19 is provided with a resistance valve front cavity I14, an adjusting gasket 18 is arranged in the slide valve 15, one side of the adjusting gasket 18 is provided with a high-pressure spring 16, the resistance valve applies rated resistance to return oil in the return process of the piston 1, the resistance valve plays a braking role on the piston 1, and the adjusting gasket 18 is used for fine adjustment of pretightening force of the resistance valve.
Further, a resistance element 17 is provided on one side of the reversing valve 13.
Further, the reversing valve 13 is connected to the first drag valve front chamber 14 through the low pressure port 8.
Further, the resistance element 17 may employ spring force or small plunger hydraulic force, etc.
The working principle is that the main executive component comprises a piston 1, a thrust piston 11, a reversing valve 13 and a resistance valve. The front cavity of the rock drill piston is at high pressure, and the rear end face is alternately changed with oil; the thrust piston rear cavity is at high pressure, the signal cavity is communicated with the piston signal cavity, and the front cavity is communicated with the inlet of the resistance valve. The piston is matched with the thrust piston to move to change the oil condition of a control port of the reversing valve, so that the reversing valve moves alternately; meanwhile, the alternating motion of the reversing valve changes the oil connection condition of the rear end face of the piston, so that the resultant force direction valve of the piston is changed.
The rear end face A of the piston is larger than the front cavity A; the oil pressure relation is high pressure > the oil return pressure, and the oil return pressure is approximately equal to zero; the sum of the resistance valve resistance and the thrust piston rear cavity acting force is larger than the piston front cavity acting force is larger than the resistance valve resistance; resistance pressure pa=fa/Aa, fa provided by the resistance valve: resistance valve spring resistance, aa: the action area of the front cavity of the resistance valve; in order to ensure the normal periodic movement of the reversing valve, it is necessary to ensure that when the high pressure > the resistance valve pressure > the return oil, the reversing valve thrust is greater than the reversing valve opening pressure when the reversing valve control port is equal to the resistance valve pressure, and the reversing valve thrust is greater than the reversing valve opening pressure when the reversing valve control port is equal to the high pressure oil.
Based on the figures 1-11 in the drawings, the following is the working state
Initial state
The piston 1 moves backwards from the impact point, the piston front cavity 2 is connected with high-pressure oil, the piston rear end oil cavity 4 and the piston signal cavity 3 are connected with a low-pressure port of the reversing valve 13, and the piston is accelerated backwards at this stage due to the fact that the volume of the piston rear end oil cavity is gradually reduced, and the pressure of the resistance valve front cavity is promoted to be increased due to the fact that the oil compressibility is small.
The backhaul stage includes:
the front cavity of the resistance valve generates stable back pressure, and the resistance valve is opened
The second resistance valve front cavity 19 generates stable back pressure, the resistance valve is opened, and the inlet pressure of the resistance valve is gradually increased until the acting force of the second resistance valve front cavity 19 overcomes the acting force of the high-pressure spring 16, so that the resistance valve is opened, and the pressure of the second resistance valve front cavity 19 is maintained at Pa under the action of the resistance valve. The oil cavity at the rear end of the piston forms stable resistance valve pressure Pa, and the acting force of the resistance valve is smaller than that of the front cavity 2 of the piston, so that the resultant force direction is backward, and the piston 1 continues to accelerate backward.
The piston signal chamber 3 is closed
The piston 1 moves backwards, the piston signal cavity 3 is closed, the control port of the reversing valve 13 is in a dead space state, the reversing valve 13 is kept pressed in the left position, and the reversing valve 13 is kept in the left position because the compressibility of oil is small so that the reversing valve 13 can not change position even if the control port is closed. The piston 1 continues to accelerate backward at this stage.
The piston 1 is in contact with the thrust piston 11
The piston 1 moves backwards, contacts with the thrust piston 11, the piston signal cavity 3 is still closed, the control port of the reversing valve 13 is in a dead space state, and the reversing valve 13 is kept in a left position. On the piston 1 where the acting force of the rear cavity 10 of the thrust piston starts to act, the sum of the resistance valve and the acting force of the rear cavity 10 of the thrust piston is larger than the acting force of the front cavity 2 of the piston, and the resultant force direction is forward, so that the piston 1 performs the deceleration motion backwards at the stage.
The thrust piston signal cavity 9 is communicated with the piston rear end oil cavity 4
The piston 1 and the thrust piston 11 move backwards to reach the critical point that the thrust piston signal cavity 9 is communicated with the piston signal cavity 3. Because the resistance valve front cavity volume change oil cavity comprises the piston rear end oil cavity and the thrust piston rear cavity 10, the piston 1 and the thrust piston 11 move backwards, the total volume of the two cavities is reduced, so the resistance valve pressure still keeps Pa, the direction valve control port pressure is Pa, the direction valve is kept at the left position, the resultant force direction keeps forward, and the piston 1 continues to perform the speed reduction motion backwards.
The speed of the piston 1 is reduced to zero
The piston 1 and the thrust piston 11 move backwards until the speed is reduced to zero and reaches the final end of the stroke, and the thrust piston does not reach the mechanical limit of the rear end when reaching the final end, at this time, the resultant force of the thrust piston 11 still keeps forward, so that the return stroke is completed and the stroke stage is entered.
The stroke phase comprises:
the piston 1 moves forward
The piston 1 and the thrust piston 11 move forwards, the volume of the rear end face of the piston is increased, the area of the front end face of the thrust piston 12 is reduced, the sum of the volumes of the rear end face of the piston and the front end face of the thrust piston is gradually increased, the back pressure of the inlet of the resistance valve disappears, the pressure of the control port of the reversing valve 13 is reduced, and the reversing valve 13 is gradually pressed to the right. The high-pressure oil is communicated after the reversing valve 13 is pressed to the left, the acting force of the high-pressure oil on the oil cavity at the front and rear ends, which is applied to the piston 1, and the thrust of the rear cavity 10 of the thrust piston are larger than the acting force of the front cavity 2 of the piston, the resultant force is forward, the piston 1 accelerates forward with new acceleration, and the acceleration is larger than that in the upper stage.
The thrust piston signal chamber 9 disconnects the piston signal chamber 3
The piston 1 and the thrust piston 11 move forward; because the reversing valve 13 needs a period of time from the beginning of movement to the completion of the whole reversing process, the reversing completion time of the reversing valve 13 is ensured to be close to the moment when the thrust piston signal cavity 9 is disconnected, and the pressure of the control port of the reversing valve is ensured to be in a lower state before the stage due to the small compressibility of oil, so that the reversing valve 13 always keeps the right position; when the thrust piston 11 moves forwards until the thrust piston signal cavity 9 is closed, the control port of the reversing valve becomes a dead space, and the reversing valve 13 is kept still at the right position; the thrust piston signal chamber 9 is pressurized until the resistance valve opens and remains, and the piston 1 and thrust piston 11 together accelerate forward movement. The piston 1 and the thrust piston 11 keep the acceleration of the previous step accelerating forward.
The thrust piston 11 reaches the front end limit position
The piston 1 and the thrust piston 11 move forward until the thrust piston 11 reaches the front limit. The thrust piston signal cavity 9 is closed, and the reversing valve 13 is kept at the right position; because the thrust piston 11 reaches the front end limit, the volume of the front cavity 12 of the thrust piston is not changed any more, namely the volume of the connecting cavity of the second 19 of the resistance valve is not changed any more, so that the inlet pressure of the resistance valve is reduced, and the resistance valve is closed; the piston 1 is separated from the thrust piston 11, the thrust piston 11 is pressed in this position, and the piston 1 is accelerated forward with a new acceleration.
High-pressure oil in rear cavity of piston signal cavity 3
The piston 1 moves forwards until the piston signal cavity 3 is communicated with high-pressure oil in the rear end oil cavity, the control port of the reversing valve is communicated with high-pressure oil, the reversing valve 13 starts to move rightwards, the thrust piston 11 is pressed at the front end limiting position, and the piston 1 still keeps moving forwards to accelerate.
The piston 1 reaches the impact point, and the reversing valve 13 is used for reversing
The piston 1 moves forward, the piston 1 reaches the impact surface, and then moves backward; at this time, the reversing valve reverses to the left; the back end surface of the piston 1 is communicated with the inlet of the resistance valve to complete the whole period and enter the return accelerating movement stage of the next stage. .
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. An impact device provided with a resistance valve, comprising a piston means, characterized in that: the piston device is connected with a reversing valve (13), and the reversing valve (13) is connected with a resistance valve.
2. An impact device provided with a resistance valve according to claim 1, characterized in that: the piston device comprises a piston (1), a piston front cavity (2) and a thrust piston (11), wherein the piston (1) penetrates through the piston front cavity (2), a piston signal cavity (3) and a piston rear end oil cavity (4) are arranged at the pushing end of the piston (1), the thrust piston (11) is provided with the thrust piston front cavity (12) corresponding to one end of the piston (1), the tail end of the thrust piston (11) is provided with the thrust piston rear cavity (10), and a thrust piston signal cavity (9) is arranged on the outer side wall surface of the thrust piston (11).
3. An impact device provided with a resistance valve according to claim 2, characterized in that: the piston signal cavity (3) is connected with the reversing valve (13) through the control port (6), the oil cavity (4) at the rear end of the piston is connected with the reversing valve (13) through the outlet (5), and the reversing valve (13) is connected with an external pipeline and the piston front cavity (2) through the high-pressure port (7).
4. An impact device provided with a resistance valve according to claim 1, characterized in that: the resistance valve comprises a resistance valve front cavity II (19) and a slide valve (15), a resistance valve front cavity I (14) is arranged on the resistance valve front cavity II (19), an adjusting gasket (18) is arranged in the slide valve (15), and a high-pressure spring (16) is arranged on one side of the adjusting gasket (18).
5. An impact device provided with a resistance valve according to claim 1, characterized in that: a resistance element (17) is arranged on one side of the reversing valve (13).
6. An impact device equipped with a resistance valve according to claim 4, characterized in that: the reversing valve (13) is connected with the first drag valve front cavity (14) through the low pressure port (8).
7. An impact device equipped with a resistance valve according to claim 5, characterized in that: the resistance element (17) adopts spring force or small push column hydraulic force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222163930.1U CN219197760U (en) | 2022-08-17 | 2022-08-17 | Impact equipment with resistance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222163930.1U CN219197760U (en) | 2022-08-17 | 2022-08-17 | Impact equipment with resistance valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219197760U true CN219197760U (en) | 2023-06-16 |
Family
ID=86716765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222163930.1U Active CN219197760U (en) | 2022-08-17 | 2022-08-17 | Impact equipment with resistance valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219197760U (en) |
-
2022
- 2022-08-17 CN CN202222163930.1U patent/CN219197760U/en active Active
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