Multi-control reverse brake valve

Abstract

The utility model relates to the field of hydraulic brake valves, in particular to a multi-control reverse brake valve which comprises a main valve bank, the main valve bank comprises a main valve sleeve, a main valve element is slidably connected into the main valve sleeve, and a plurality of branch valve banks are connected to the bottom of the main valve bank. The control method has the effect that the reverse brake valves are used in parallel to control the multiple spring brakes.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mine hydraulic machinery, in particular to a multi-control reverse brake valve. BACKGROUND

[0002] The existing mine machinery considers the safety factor, and the existing technical personnel begins to change the existing hydraulic brake system design into a spring brake hydraulic release type, that is, the spring brake is in a normally closed state. The hydraulic brake system mainly relies on the compression force of the spring to push the piston axially to move to compress the dynamic and static friction plates 3 / 4 to generate a braking torque. When the brake needs to be released, the piston is pushed in the positive direction of the hydraulic oil to move axially to release the brake. Therefore, the pressure reducing valve of the pedal brake valve used in cooperation is reversed, that is, as the braking force increases, the pressure at the outlet of the pedal pressure reducing valve needs to decrease, and when the vehicle is parked, there is no pressure, and the vehicle can be parked automatically.

[0003] The reverse brake valve in the prior art only controls a single spring brake, and the parallel use of multiple reverse brake valves will result in a larger volume, and the parallel arrangement design is difficult to install. CONTENT OF THE UTILITY MODEL

[0004] In order to use the reverse brake valve in parallel to control multiple spring brakes, the present application provides a multi-control reverse brake valve.

[0005] The multi-control reverse brake valve provided by the present application adopts the following technical scheme:

[0006] A multi-control reverse brake valve, comprising a main valve group, the main valve group comprising a main valve sleeve, a main valve core being slidably connected in the main valve sleeve, and a plurality of sub-valve groups being connected to the bottom of the main valve group.

[0007] By adopting the above technical scheme, the main valve group serves as the main body of the entire structure and provides a stable foundation. The main valve core is slidably connected in the main valve sleeve, and the main valve core cooperates with the main valve sleeve to accurately control the hydraulic pressure. The main valve group is connected to the bottom of the plurality of sub-valve groups, and the main valve group and the plurality of sub-valve groups control corresponding spring brakes.

[0008] Optionally, the sub-valve group comprises a sub-valve sleeve, and a sub-valve core is slidably connected in the sub-valve sleeve;

[0009] The main valve sleeve and the sub-valve sleeve are detachably connected;

[0010] A connecting shaft is arranged between the main valve core and the sub-valve core, and the two ends of the connecting shaft abut against the main valve core and the sub-valve core, respectively.

[0011] By adopting the above technical scheme, the corresponding spring brake is controlled by the valve sleeve and the valve core, the main valve sleeve and the valve sleeve are detachably connected, thereby maintaining the overall sealing effect, the connecting shaft is arranged between the main valve core and the valve core, and the connecting shaft serves to connect the main valve core and the valve core, thereby enabling the valve core to drive the main valve core to move upward.

[0012] The detachable main valve sleeve and the valve sleeve form a sealed cavity, and the main valve sleeve and the valve sleeve are detachably connected, so that the main valve sleeve and each valve sleeve can be installed and detached, facilitating maintenance.

[0013] Optionally, the main valve sleeve comprises a main valve base body, the main valve base body is provided with a main connecting boss at the bottom, the valve sleeve comprises a valve base body, the valve base body is provided with a connecting boss at each end, the main connecting boss and the valve connecting boss are fixed by bolts, and the main valve sleeve and the valve sleeve are provided with a sealing element.

[0014] By adopting the above technical scheme, the main valve base body is provided with a main connecting boss at the bottom, the main connecting boss and the valve connecting boss are fixed by bolts, and the sealing element is used to seal the main valve base body and the valve base body.

[0015] Optionally, the main valve core comprises a main valve core base body, the main valve core base body is provided with a main elastic element accommodating hole at the bottom, and the main elastic element accommodating hole is provided with a main elastic element.

[0016] By adopting the above technical scheme, the main elastic element accommodating hole provided at the bottom of the main valve core base body is used to accommodate the main elastic element, and the main elastic element thereby realizes control of the upward movement of the main valve core base body.

[0017] Optionally, the connecting shaft comprises a connecting shaft base body, and the connecting shaft base body is provided with a main elastic element accommodating hole at one end close to the main elastic element accommodating hole.

[0018] By adopting the above technical scheme, the connecting shaft comprises a connecting shaft base body, and the main elastic element accommodating hole provided at one side of the connecting shaft base body is used to accommodate and position the main elastic element.

[0019] Optionally, the other end of the connecting shaft is provided with a hydraulic balance hole, the hydraulic balance hole is provided with a hydraulic oil inlet along the side wall, and the bottom of the valve group is provided with a valve relief balance hole in communication with the hydraulic oil inlet.

[0020] By adopting the above technical scheme, the hydraulic oil enters the main elastic element accommodating hole through the hydraulic oil inlet and the hydraulic balance hole in sequence, thereby realizing hydraulic balance.

[0021] Optionally, the main elastic element accommodating hole is provided with a main pressure injection balance hole at the top, and the main pressure injection balance hole is provided with a main pressure injection shaft cavity along the circumferential direction of the main valve core.

[0022] By adopting the technical scheme, the hydraulic oil enters the main elastic element accommodating hole through the main injection pressure shaft cavity and the main injection pressure balance hole in sequence, so that the main elastic element accommodating hole reaches hydraulic balance.

[0023] Optionally, the sub-valve core comprises a sub-valve core base body, a sub-elastic element accommodating hole one is formed at the bottom of the sub-valve core base body, a sub-elastic element is arranged in the sub-elastic element accommodating hole one, a sub-injection pressure balance hole is formed through the sub-elastic element accommodating hole one along the radial direction of the sub-valve core, and a sub-injection pressure shaft cavity is formed on the surface of the sub-injection pressure balance hole along the circumferential direction of the sub-valve core.

[0024] By adopting the technical scheme, the sub-valve core base body provides a mounting base body, the sub-elastic element accommodating hole one provides an accommodating space for the sub-elastic element, and the hydraulic oil enters the sub-elastic element accommodating hole one through the sub-injection pressure shaft cavity and the sub-injection pressure balance hole in sequence, so that hydraulic balance is achieved.

[0025] Optionally, the bottom of the sub-valve sleeve is connected with a hydraulic plug, the hydraulic plug comprises a plug base body, and a sub-elastic element accommodating hole two is formed at the threaded end of the plug base body.

[0026] By adopting the technical scheme, the sub-valve sleeve sealed by the hydraulic plug can achieve good sealing effect, the plug base body is used for threaded connection with the sub-valve sleeve, the sub-elastic element accommodating hole two formed on the plug base body is used for accommodating the sub-elastic element, and serves as a power source for upward movement of the sub-valve core base body.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. By adopting the technical scheme, the main valve group serves as the main body of the whole structure and provides a stable foundation, the main valve core is slidably connected in the main valve sleeve, the main valve core is accurately controlled in hydraulic pressure in cooperation with the main valve sleeve, the bottom of the main valve group is connected with a plurality of sub-valve groups, and the main valve group and the plurality of sub-valve groups control corresponding spring brakes, respectively.

[0029] 2. The sub-valve sleeve controls the corresponding spring brake in cooperation with the sub-valve core, the main valve sleeve and the sub-valve sleeve are detachably connected, so as to maintain the overall sealing effect, the main valve core and the sub-valve core are provided with a connecting shaft, the connecting shaft serves to connect the main valve core and the sub-valve core, so that the sub-valve core can drive the main valve core to move upward; the detachably connected main valve sleeve and sub-valve sleeve form a sealed cavity, the main valve sleeve and the sub-valve sleeve are detachably connected, so that the main valve sleeve and each sub-valve sleeve can be installed and disassembled, facilitating maintenance.

[0030] 3. The sub-valve sleeve sealed by the hydraulic plug can achieve good sealing effect, the plug base body is used for threaded connection with the sub-valve sleeve, the sub-elastic element accommodating hole two formed on the plug base body is used for accommodating the sub-elastic element, and serves as a power source for upward movement of the sub-valve core base body. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a full sectional view of the utility model.

[0032] Explanation of the drawings: 1, main valve group;11, main valve sleeve;111, main valve base body;112, main connection boss;12, main valve core;121, main valve core base body;122, main elastic piece accommodating hole;123, main pressure injection balance hole;124, main pressure injection shaft cavity;13, main elastic piece;2, sub valve group;21, sub valve sleeve;211, sub valve base body;212, sub connection boss;22, sub valve core;221, sub valve core base body;222, sub elastic piece accommodating hole one;223, sub pressure injection balance hole;224, sub pressure injection shaft cavity;23, sub pressure relief balance hole;24, sub elastic piece;3, connecting shaft;31, connecting shaft base body;32, main elastic piece mounting hole;33, hydraulic balance hole;34, hydraulic oil inlet;4, sealing piece;5, hydraulic plug;51, plug base body;52, sub elastic piece accommodating hole two;6, main spring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings Figure 1 The application is further described in detail.

[0034] The application discloses a kind of multi-control reverse brake valve. Refer to Figure 1 It includes main valve group 1, main valve group 1 is mainly provided with hydraulic control component, main valve group 1 includes main valve sleeve 11, main valve sleeve 11 is slidably connected with main valve core 12, external hydraulic pressure is moved up and down by main valve core 12 and is adjusted to external spring brake, main valve group 1 bottom is connected with several sub valve groups 2, and each sub valve group 2 controls corresponding spring brake respectively.

[0035] Refer to Figure 1 Sub valve group 2 includes sub valve sleeve 21, sub valve sleeve 21 is slidably connected with sub valve core 22, sub valve core 22 is columnar, and sub valve core 22 in the sliding of sub valve sleeve 21 thereby plays to control each spring brake opening and closing, specifically, sub valve core 22 is located at bottom and provides high pressure hydraulic oil for external brake, so that spring brake opens, and sub valve core 22 is located at top and releases high pressure hydraulic oil for external brake, so that spring brake closes;Main valve sleeve 11 and sub valve sleeve 21 are detachably connected, and main valve sleeve 11 and sub valve sleeve 21 after connection are controlled to open and close external spring brake by main valve core 12 and sub valve core 22 respectively;Main valve core 12 and sub valve core 22 are provided with connecting shaft 3, connecting shaft 3 plays the role of connecting main valve core 12 and sub valve core 22, and the two ends of connecting shaft 3 are respectively abutted with main valve core 12 and sub valve core 22, after main valve core 12 is given and moves up, each sub valve core 22 is pushed by abutting through connecting shaft 3, so that all sub valve cores 22 slide upwards, and the pressure relief of all spring brakes is realized.

[0036] With reference to Figure 1 , the main valve sleeve 11 comprises a main valve base 111, and the main valve base 111 is provided with a main connecting boss 112 at the bottom; the sub valve sleeve 21 comprises a sub valve base 211, and the sub valve base 211 is provided with a sub connecting boss 212 at each end; the main connecting boss 112 and the sub connecting boss 212 are fixed by bolts; the main valve sleeve 11 and the sub valve sleeve 21 are provided with a sealing element 4, and the main valve sleeve 11 and the sub valve sleeve 21 are sealed after the bolts are tightened.

[0037] With reference to Figure 1 , the connecting shaft 3 comprises a connecting shaft base 31, and the connecting shaft base 31 is provided with a main elastic element mounting hole 32 at one end close to the main elastic element accommodating hole 122; the main elastic element mounting hole 32 is provided with a main elastic element 13; the main elastic element 13 drives the connecting shaft base 31 to slide upward, thereby providing space for the movement of the sub valve base 211 at the bottom, and further enabling the sub valve core 22 in the sub valve base 211 to move, thereby releasing pressure of the external spring brake.

[0038] With reference to Figure 1 , the connecting shaft 3 comprises a connecting shaft base 31, and the connecting shaft base 31 can slide along the inner cavities of the main valve sleeve 11 and the sub valve sleeve 21; the connecting shaft base 31 is provided with a main elastic element accommodating hole 122 at one end close to the main elastic element accommodating hole 122; the main elastic element accommodating hole 122 provides space for the installation of the main elastic element 13.

[0039] With reference to Figure 1 , the other end of the connecting shaft 3 is further provided with a hydraulic balance hole 33, and the hydraulic balance hole 33 does not communicate with the main elastic element accommodating hole 122; the hydraulic balance hole 33 is provided with a hydraulic oil inlet 34 along the diameter direction of the side wall; the sub valve group 2 is provided with a hydraulic oil inlet 34 corresponding to the position of the hydraulic oil inlet 34; the hydraulic oil enters the hydraulic balance hole 33 through the hydraulic oil inlet 34 in sequence, thereby achieving oil pressure balance.

[0040] With reference to Figure 1 , the main elastic element accommodating hole 122 is provided with a main pressure injection balance hole 123 along the radial direction of the main valve core 12; the main pressure injection balance hole 123 is provided with a main pressure injection shaft cavity 124 along the circumferential direction of the main valve core 12; the hydraulic oil enters the main elastic element accommodating hole 122 through the main pressure injection shaft cavity 124 and the main pressure injection balance hole 123 in sequence, thereby balancing the oil pressure communicated with the external spring brake, and ensuring that the movement of the main valve core 12 and the sub valve core 22 is not affected by the hydraulic drive.

[0041] With reference to Figure 1The valve core 22 comprises a valve base 211, and a relief pressure balance hole 23 is formed in the bottom of the valve base 211. A spring 24 is arranged in the relief pressure balance hole 23, and the relief pressure balance hole 23 provides a mounting space for the spring 24. The relief pressure balance hole 23 is provided with an injection pressure balance hole 223 penetrating in the radial direction of the valve core 22. The injection pressure balance hole 223 is provided with an injection pressure shaft cavity 224 in the circumferential direction of the valve core 22. Hydraulic oil enters the spring accommodating hole 52 through the injection pressure balance hole 223 in sequence, so that the spring accommodating hole 52 and the external spring brake are hydraulically balanced, and the driving of the spring 24 is not affected.

[0042] With reference to Figure 1 The bottom valve sleeve 21 is connected with a hydraulic plug 5 at the bottom. The hydraulic plug 5 is used for sealing and mounting the valve sleeve 21. The hydraulic plug 5 comprises a plug base 51, and the plug base 51 is connected with the valve sleeve 21 through threads. The threaded end of the plug base 51 is provided with a spring accommodating hole 52, and the spring 24 is arranged in the spring accommodating hole 52. When braking, the spring 24 controls the valve core 22 to provide upward movement force.

[0043] The implementation principle of the multi-control reverse brake valve is as follows: the original state is that the A port is communicated with the P port, so that the spring brake is in the normally open state. When the operator releases the brake plate, the main valve core 12 is driven downward by the main spring 6, the A port is communicated with the P port, the spring brake is in the normally open state, the A port of the main valve sleeve 11 is provided with a main check valve, the main check valve is used for realizing one-way conduction from the A port to the P port, and reverse cut-off. When the P port suddenly loses pressure, hydraulic oil flows back to the P port from the A port, so that the main spring brake is in the brake state. At the same time, the valve core 22 in the bottom valve sleeve 21 is driven upward and downward by the connecting shaft 3, and the bottom valve sleeve 21 has the same principle as above, so that the spring brake is in the brake state. The above process is the same.

[0044] The above are the preferred embodiments of the present application, but not the limitation of the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A multi-control reverse brake valve, characterized in that: The invention comprises a main valve group (1), wherein the main valve group (1) comprises a main valve sleeve (11), a main valve core (12) is slidably connected in the main valve sleeve (11), and a plurality of sub-valve groups (2) are connected to the bottom of the main valve group (1).

2. The multi-control reverse brake valve according to claim 1, characterized in that: The sub-valve group (2) comprises a sub-valve sleeve (21), and a sub-valve core (22) is slidably connected in the sub-valve sleeve (21); The main valve sleeve (11) and the sub-valve sleeve (21) are detachably connected; A connecting shaft (3) is provided between the main valve core (12) and the sub-valve core (22), and two ends of the connecting shaft (3) are respectively in contact with the main valve core (12) and the sub-valve core (22).

3. The multi-control reverse brake valve according to claim 2, characterized in that: The main valve sleeve (11) includes a main valve base (111), a main connecting boss (112) is provided at the bottom of the main valve base (111), the sub-valve sleeve (21) includes a sub-valve base (211), sub-connecting bosses (212) are provided at both ends of the sub-valve base (211), the main connecting boss (112) and the sub-connecting boss (212) are fixed by bolts, and a sealing member (4) is provided between the main valve sleeve (11) and the sub-valve sleeve (21).

4. The multi-control reverse brake valve according to claim 3, characterized in that: The main valve core (12) comprises a main valve core base (121), a main elastic member receiving hole (122) is provided at the bottom of the main valve core base (121), and a main elastic member (13) is provided in the main elastic member receiving hole (122).

5. The multi-control reverse brake valve according to claim 4, characterized in that: The connecting shaft (3) comprises a connecting shaft base (31), and a main elastic member mounting hole (32) is provided at one end of the connecting shaft base (31) close to the main elastic member accommodating hole (122).

6. The multi-control reverse brake valve according to claim 5, characterized in that: A hydraulic balance hole (33) is provided at the other end of the connecting shaft (3), a hydraulic oil inlet (34) is provided along the side wall of the hydraulic balance hole (33), and a pressure relief balance hole (23) is provided at the bottom of the sub-valve group (2) in communication with the hydraulic oil inlet (34).

7. The multi-control reverse brake valve according to claim 6, characterized in that: A main injection pressure balancing hole (123) is provided at the top of the main elastic member accommodating hole (122), and a main injection pressure shaft cavity (124) is provided on the surface where the main injection pressure balancing hole (123) is located along the circumferential direction of the main valve core (12).

8. The multi-control reverse brake valve according to claim 7, characterized in that: The sub-valve core (22) includes a sub-valve core base (221), a sub-elastic component accommodating hole (222) is provided at the bottom of the sub-valve core base (221), a sub-elastic component (24) is provided in the sub-elastic component accommodating hole (222), a sub-injection pressure balancing hole (223) is provided through the sub-elastic component accommodating hole (222) along the radial direction of the sub-valve core (22), and a sub-injection pressure axis cavity (224) is provided on the surface where the sub-injection pressure balancing hole (223) is located along the circumferential direction of the sub-valve core (22).

9. The multi-control reverse brake valve according to claim 8, characterized in that: The bottom of the sub-valve sleeve (21) at the bottom is connected to a hydraulic plug (5), and the hydraulic plug (5) includes a plug base (51), and the threaded end of the plug base (51) is provided with the second sub-elastic component accommodating hole (52).

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