A reverse hydraulic lock valve group

Abstract

The application discloses a reverse hydraulic lock valve group, which comprises a valve body, a hydraulic lock assembly one, a hydraulic lock assembly two, an oil passage one, an oil passage two, an oil passage three, an oil passage four and an oil passage five; the hydraulic lock assembly one comprises a lock valve spool one, a lock valve sleeve one and a push rod one screw plug; the oil passage two is communicated with an oil passage hole one on the lock valve sleeve one, and the oil passage one is communicated with a left side cavity of the push rod one; the hydraulic lock assembly two comprises a push rod two, a lock valve sleeve two and a lock valve spool two; the oil passage four is communicated with an oil passage hole two on the lock valve sleeve two, and the oil passage five is communicated with a right side cavity of the push rod two; wherein the left side cavity of the push rod two is communicated with the oil passage two through the oil passage three. The reverse hydraulic lock valve group uses a double-layer cross control oil path design, one group of reverse hydraulic locks is arranged on each layer, and cross oil paths are formed between the two layers to control the other group. The lock port of the hydraulic lock is both a pressure maintaining oil port and a pilot oil control oil port, and the lock port of a conventional hydraulic lock can only be used as the pressure maintaining oil port.

Description

Technical Field

[0001] This invention relates to the field of hydraulic valve technology, and more specifically to a reverse hydraulic lock valve assembly. Background Technology

[0002] A traditional two-way hydraulic lock valve assembly consists of two sets of hydraulically controlled check valves. The principle is that the two check valves draw pressure oil from the other's oil circuit as pilot oil. When pressure oil is supplied to one line, opening its check valve and simultaneously causing the pressure oil to act as a control circuit, it pushes open the other hydraulically controlled check valve, allowing the oil to flow in the opposite direction and thus unlocking. When there is no pressure in one line, the other line closes simultaneously.

[0003] However, the controlled oil port of this conventional two-way hydraulic lock can only be used as a lock port. It cannot provide control pilot oil in reverse to open another set of hydraulic control check valves to form reverse oil flow. Conventional two-way hydraulic locks cannot achieve this function and cannot be applied to occasions that require this function. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the purpose of this invention is to provide a reverse hydraulic lock valve assembly that can unlock the reverse oil port and can also be used as a lock port.

[0005] Therefore, the present invention proposes a reverse hydraulic lock valve assembly, including a valve body, a hydraulic lock assembly one, a hydraulic lock assembly two, an oil passage one, an oil passage two, an oil passage three, an oil passage four, and an oil passage five; wherein, the oil passage one is connected to the oil port one, the oil passage two is connected to the oil port three, the oil passage five is connected to the oil port two, and the oil passage four is connected to the oil port four.

[0006] The first hydraulic lock assembly includes a first lock valve core, a first lock valve sleeve, and a first push rod with a screw plug; the second oil passage is connected to the first oil passage hole on the first lock valve sleeve, and the first oil passage is connected to the left side chamber of the first push rod; the second hydraulic lock assembly includes a second push rod, a second lock valve sleeve, and a second lock valve core; the fourth oil passage is connected to the second oil passage hole on the second lock valve sleeve, and the fifth oil passage is connected to the right side chamber of the second push rod; wherein, the left side chamber of the second push rod is connected to the second oil passage through the third oil passage.

[0007] Furthermore, when the oil flows from port one through the hydraulic lock assembly one, port three acts as a lock to maintain pressure; when the oil enters port two, port four acts as a lock to maintain pressure; when the oil enters port three, the pressurized oil opens the lock valve core two through the oil passage three, and the oil in port four returns to port two through the hydraulic lock assembly two.

[0008] Furthermore, the right cavity of the push rod is connected to the oil passage five via the oil passage six; when the oil enters the oil port four, the locking valve core one is opened through the oil passage six, so that the oil in the oil port three flows back to the oil port one through the locking valve core one.

[0009] Furthermore, the locking valve core is located inside the locking valve sleeve, and the locking valve core has a conical surface that fits tightly with the inner cavity of the locking valve sleeve.

[0010] Furthermore, the first hydraulic lock assembly and the second hydraulic lock assembly also include a screw plug and a locking plug.

[0011] The reverse hydraulic lock valve assembly provided by this invention can serve as a pressure-holding oil port for the lock and can also provide pilot control oil for reverse unlocking of another set of hydraulic locks. The oil circuit adopts a double-layer cross control oil circuit design, forming a two-layer hydraulic check valve design. The reverse hydraulic lock has a built-in conical structure valve core to ensure a tight fit with the valve sleeve, minimal internal leakage, and good resistance to contamination.

[0012] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0014] Figure 1 This is a schematic diagram of the reverse hydraulic lock valve assembly of the present invention;

[0015] Figure 2 This is a schematic diagram of the reverse hydraulic lock valve assembly of the present invention;

[0016] Figure 3 This is a BB-direction sectional view of the reverse hydraulic lock valve assembly of the present invention;

[0017] Figure 4 This is a sectional view of the reverse hydraulic lock valve assembly of the present invention along line AA;

[0018] Explanation of reference numerals in the attached figures

[0019] 1. Oil passage one; 2. Oil passage two; 3. Oil passage three; 4. Oil passage four; 5. Oil passage five; 6. Oil passage six; 7. Valve body; 8. Lock plug; 9. Lock valve core one; 10. Lock valve sleeve one; 11. Push rod one; 12. Screw plug; 13. Push rod two; 14. Lock valve sleeve two; 15. Lock valve core two; C1. Oil port one; C2. Oil port two; V1. Oil port three; V2. Oil port four. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1-4 As shown, the reverse hydraulic lock valve assembly of the present invention includes: a valve body 7, upper and lower valve chambers and several oil passages. Hydraulic lock assembly one and hydraulic lock assembly two are respectively arranged in the two valve chambers. The several oil passages include oil passage one 1, oil passage two 2, oil passage three 3, oil passage four 4, oil passage five 5 and oil passage six 6.

[0022] Specifically, such as Figure 3 As shown, the hydraulic lock assembly includes, from left to right, a locking plug 8, a locking valve core 9, a locking valve sleeve 10, a push rod 11, and a screw plug 12; the locking valve core 9 is located inside the locking valve sleeve 10 and has a conical surface that fits tightly with the inner cavity of the locking valve sleeve 10; at the same time, the locking valve sleeve 10 is provided with an oil passage hole 1; the oil passage 2 communicates with the oil passage hole 1 of the locking valve sleeve 10, and the oil passage 1 communicates with the left side chamber of the push rod 11.

[0023] like Figure 4 As shown, the hydraulic lock assembly 2 includes a screw plug 12, a push rod 2 13, a lock valve sleeve 2 14, a lock valve core 2 15, and a lock plug 8 arranged sequentially from right to left; the lock valve core 2 15 cooperates with the lock valve sleeve 2 14, the oil passage 4 is connected to the oil passage 2 on the lock valve sleeve 2 14, and the oil passage 5 is connected to the right chamber of the push rod 2 13.

[0024] Specifically, the left cavity of push rod 2 13 is connected to oil passage 2 2 via oil passage 3 3, and the right cavity of push rod 1 11 is connected to oil passage 5 via oil passage 6 6. In addition, oil port 1 C1 is connected to oil passage 1 1, oil port 3 V1 is connected to oil passage 2 2, oil port 2 C2 is connected to oil passage 5 5, and oil port 4 V2 is connected to oil passage 4 4.

[0025] When the pressurized oil enters port C1, the oil passes through oil passage 1 and hydraulic lock assembly 1 (including lock valve core, lock valve sleeve, lock plug, and seal) to open lock valve core 9, and then enters port V1 through oil passage 2. At this time, port V1 plays the role of locking and maintaining pressure.

[0026] When the pressurized oil enters port 3V1, the pilot oil enters the hydraulic lock assembly 2 through oil passage 2 and cross-controlled oil passage 3. The pressurized oil pushes push rod 213 to move and open hydraulic lock valve core 215. The oil in port 4V2 passes through oil passage 4, through hydraulic lock valve core 215, and through oil passage 5 back to port 2C2.

[0027] Similarly, when pressurized oil enters port C2, port V2 acts as a locking valve to maintain pressure. When pressurized oil enters port V2, the locking valve core 9 is opened through the cross-controlled oil passage 6, allowing the oil in port V1 to flow back to port C1 via the locking valve core 9.

[0028] This invention provides a reverse hydraulic lock valve assembly that can achieve reverse oil port unlocking and can also be used as a lock port. This reverse hydraulic lock valve assembly uses a double-layer cross-control oil circuit design, with one set of reverse hydraulic locks arranged in each layer, and a cross oil circuit formed between the two layers to control the other set respectively. The lock port of the hydraulic lock is both a pressure-holding oil port and a pilot oil control oil port, whereas the lock port of a conventional hydraulic lock can only be used as a pressure-holding oil port.

[0029] Each set of reverse hydraulic locks operates on the principle of a one-way valve when the hydraulic fluid is flowing normally, allowing only forward flow. The lock port maintains pressure, preventing reverse flow. When hydraulic fluid enters from the lock port, the pressure-maintaining port uses a cross-control oil circuit to move the push rod, opening the other side of the reverse hydraulic lock and allowing the hydraulic fluid to flow in the reverse direction. This reverse hydraulic lock features a built-in conical valve core, ensuring a tight fit with the valve sleeve and minimal internal leakage. It also exhibits excellent resistance to contamination, preventing the valve core from easily jamming.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A reverse hydraulic lock valve assembly, characterized in that, include: Valve body (7), hydraulic lock assembly one, hydraulic lock assembly two, oil passage one (1), oil passage two (2), oil passage three (3), oil passage four (4) and oil passage five (5); wherein, oil passage one (1) is connected to oil port one (C1), oil passage two (2) is connected to oil port three (V1), oil passage five (5) is connected to oil port two (C2), and oil passage four (4) is connected to oil port four (V2); oil port one (C1) and oil port two (C2) are working oil ports, and oil port three (V1) and oil port four (V2) are lock ports that have both pressure holding and pilot control functions; The hydraulic lock assembly includes a lock valve core (9), a lock valve sleeve (10), and a push rod (11); the second oil passage (2) is connected to the oil passage hole on the first lock valve sleeve (10), the first oil passage (1) is connected to the left chamber of the push rod (11); the right chamber of the push rod (11) is connected to the fifth oil passage (5) through the sixth oil passage (6); The hydraulic lock assembly 2 includes a push rod 2 (13), a lock valve sleeve 2 (14), and a lock valve core 2 (15); the oil passage 4 (4) is connected to the oil passage 2 on the lock valve sleeve 2 (14), and the oil passage 5 (5) is connected to the right chamber of the push rod 2 (13); wherein, the left chamber of the push rod 2 (13) is connected to the oil passage 2 (2) through the oil passage 3 (3); When the oil enters the first port (C1) and passes through the first hydraulic lock assembly, the third port (V1) acts as a lock to maintain pressure; when the oil enters the second port (C2), the fourth port (V2) acts as a lock to maintain pressure; when the oil enters the third port (V1), the pressurized oil opens the second lock valve core (15) through the third oil passage (3), and the oil in the fourth port (V2) returns to the second port (C2) through the second hydraulic lock assembly. When the oil enters the fourth oil port (V2), the locking valve core (9) is opened through the sixth oil passage (6), so that the oil in the third oil port (V1) flows back to the first oil port (C1) through the locking valve core (9).

2. The reverse hydraulic lock valve assembly according to claim 1, characterized in that, The locking valve core (9) is located inside the locking valve sleeve (10), and the locking valve core (9) has a conical surface that fits tightly with the inner cavity of the locking valve sleeve (10).

3. The reverse hydraulic lock valve assembly according to claim 1, characterized in that, Both the hydraulic lock assembly one and the hydraulic lock assembly two include a screw plug (12) and a locking plug (8).

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