A new type of explosion-proof diesel engine monorail crane braking system

Abstract

The present invention discloses a novel explosion-proof diesel engine monorail crane braking system, which relates to the field of monorail cranes, and comprises a main body, wherein the upper outer surface of the main body is provided with a speed limiting device, and the middle part of the main body is provided with a three-way proportional pressure reducing valve and a main control valve assembly, wherein the main control valve assembly is located on one side of the three-way proportional pressure reducing valve, and the upper outer surface of the main control valve assembly is provided with a first brake solenoid valve and a second brake solenoid valve, wherein the first brake solenoid valve is located on one side of the second brake solenoid valve, and the speed limiting device comprises a speed limiting frame, a speed limiting mechanism and a traveling wheel. The novel explosion-proof diesel engine monorail crane braking system described in the present invention realizes four overspeed braking modes of automatic deceleration, automatic slow stop, automatic emergency stop and mechanical emergency stop, realizes multi-speed adjustment, greatly improves the safety of overspeed protection during the operation of the explosion-proof diesel engine monorail crane, and the effect of use is better than that of the traditional method.

Description

Technical Field

[0001] The invention relates to the field of monorail cranes, and in particular to a novel explosion-proof diesel engine monorail crane braking system. Background Art

[0002] As an indispensable and key link in mine production services, explosion-proof diesel engine monorail crane is responsible for the transportation of mining and production materials. It can be called the "highway" of underground transportation. The overspeed braking system of the existing explosion-proof diesel engine monorail crane has a single control function and a high safety risk factor. The braking stability of the explosion-proof diesel engine monorail crane after overspeeding has become an important issue that needs to be urgently solved for the current explosion-proof diesel engine monorail crane.

[0003] The current existing scheme uses electronic and mechanical emergency braking after overspeeding. During the operation of the locomotive, after overspeeding, the locomotive controller will receive the speed sent by the speed sensor and issue a braking command to make the locomotive stop urgently, or trigger the centrifugal speed limiter to release the high-pressure oil in the brake cylinder to cause the brake to engage. To a certain extent, it meets the performance requirements of locomotive overspeed protection, but it also has shortcomings: the overspeed protection device is large, the braking system control function is single, and the safety risk factor is large. After overspeeding, the speed limiter is triggered, and the monorail crane locomotive stops urgently, which is prone to accidents and injuries. For this reason, we propose a new explosion-proof diesel engine monorail crane braking system. Summary of the invention

[0004] The main purpose of the present invention is to provide a novel explosion-proof diesel engine monorail crane braking system, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a new explosion-proof diesel engine monorail crane braking system, comprising a main body, a speed limiting device is arranged on the upper outer surface of the main body, a three-way proportional pressure reducing valve and a main control valve assembly are arranged in the middle of the main body, the main control valve assembly is located on one side of the three-way proportional pressure reducing valve, a first brake solenoid valve and a second brake solenoid valve are arranged on the upper outer surface of the main control valve assembly, the first brake solenoid valve is located on one side of the second brake solenoid valve, the speed limiting device comprises a speed limiting frame, a speed limiting mechanism and a running wheel, the speed limiting mechanism and the running wheel are both located in the middle of the speed limiting frame, and the running wheels are located on both sides of the speed limiting mechanism.

[0006] Preferably, a first fixing thread is provided between the main body and the three-way proportional pressure reducing valve, and an inner surface of one end of the main body is detachably connected to an outer surface of one end of the three-way proportional pressure reducing valve via the first fixing thread.

[0007] Preferably, a second fixing thread is provided between the main body and the main control valve assembly, and an inner surface of one end of the main body is detachably connected to an outer surface of one end of the main control valve assembly via the second fixing thread.

[0008] Preferably, fixing nuts are provided between the main control valve assembly and the first brake solenoid valve and the second brake solenoid valve, and the upper end outer surface of the main control valve assembly is detachably connected to the outer surfaces of one end of the first brake solenoid valve and the second brake solenoid valve through the fixing nuts, and the number of the first brake solenoid valve is two groups.

[0009] Preferably, a cross screw is provided between the speed limiting mechanism and the speed limiting frame, and an inner surface of one end of the speed limiting mechanism is detachably connected to an outer surface of one end of the speed limiting frame via the cross screw.

[0010] Preferably, a fixing groove is provided between the speed limiting mechanism and the running wheel, and the inner surface of one end of the speed limiting mechanism is detachably connected to the outer surface of one end of the running wheel through the fixing groove, and the number of the running wheels is two groups.

[0011] Preferably, the first brake solenoid valve does not have a throttling function, the second brake solenoid valve has a throttling function, and the speed limiting device is a centrifugal speed limiter.

[0012] Preferably, a Pozidriv screw is provided between the main body and the speed limiting device, and the upper outer surface of the main body is detachably connected to the outer surface of one end of the speed limiting device via the Pozidriv screw, and the number of the speed limiting devices is two groups.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the novel explosion-proof diesel engine monorail crane braking system:

[0014] 1. This explosion-proof diesel engine monorail crane locomotive adopts a three-way proportional pressure reducing valve. When the locomotive speed exceeds the maximum allowed speed by 5-7%, the system controls the output pressure of the three-way proportional pressure reducing valve to adjust the displacement of the pump, and at the same time controls the engine throttle opening to reduce the engine speed and automatically decelerate;

[0015] 2. This explosion-proof diesel engine monorail crane locomotive adopts a brake solenoid valve with a throttling function. When the locomotive speed exceeds 8-10% of the maximum allowed running speed, the brake solenoid valve with a throttling function opens, the brake cylinder slowly loses pressure, and the locomotive automatically stops slowly;

[0016] 3. This explosion-proof diesel engine monorail crane locomotive uses a brake solenoid valve without a throttling function. When the locomotive speed exceeds the maximum allowed speed by 11-13%, the brake solenoid valve without a throttling function opens, the brake cylinder loses pressure, and the locomotive automatically stops;

[0017] 4. This explosion-proof diesel engine monorail crane locomotive adopts a centrifugal speed limiter. When the locomotive speed exceeds the maximum allowable operating speed by 14-15%, the centrifugal speed limiter is triggered, the brake cylinder loses pressure, and the locomotive automatically stops. The effect of using it is better than that of the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a novel explosion-proof diesel engine monorail crane braking system of the present invention;

[0019] Figure 2 This is a structural diagram of a novel three-way proportional pressure reducing valve of a brake system of a monorail crane of an explosion-proof diesel engine according to the present invention;

[0020] Figure 3 This is a schematic diagram of a novel three-way proportional pressure reducing valve of a brake system for a monorail crane of an explosion-proof diesel engine according to the present invention;

[0021] Figure 4 This is a structural diagram of a main control valve assembly of a novel explosion-proof diesel engine monorail crane braking system of the present invention;

[0022] Figure 5 This is a circuit diagram of the second brake solenoid valve of a novel explosion-proof diesel engine monorail crane brake system of the present invention;

[0023] Figure 6 This is a structural diagram of a novel explosion-proof diesel engine monorail crane braking system speed limiting device of the present invention;

[0024] Figure 7 This is a structural diagram of a speed limiting mechanism of a novel explosion-proof diesel engine monorail crane braking system of the present invention;

[0025] Figure 8 The present invention discloses a circuit diagram of the first brake solenoid valve of a novel explosion-proof diesel engine monorail crane brake system.

[0026] In the figure: 1. main body; 2. speed limiting device; 3. three-way proportional pressure reducing valve; 4. main control valve assembly; 5. first brake solenoid valve; 6. second brake solenoid valve; 7. speed limiting frame; 8. speed limiting mechanism; 9. travel wheel. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] like Figure 1-8 As shown, a novel explosion-proof diesel engine monorail crane braking system comprises a main body 1, a speed limiting device 2 is arranged on the upper outer surface of the main body 1, a three-way proportional pressure reducing valve 3 and a main control valve assembly 4 are arranged in the middle of the main body 1, the main control valve assembly 4 is located on one side of the three-way proportional pressure reducing valve 3, a first brake solenoid valve 5 and a second brake solenoid valve 6 are arranged on the upper outer surface of the main control valve assembly 4, the first brake solenoid valve 5 is located on one side of the second brake solenoid valve 6, the speed limiting device 2 comprises a speed limiting frame 7, a speed limiting mechanism 8 and a running wheel 9, the speed limiting mechanism 8 and the running wheel 9 are both located in the middle of the speed limiting frame 7, and the running wheel 9 is located on both sides of the speed limiting mechanism 8.

[0029] Furthermore, a first fixed thread is provided between the main body 1 and the three-way proportional pressure-reducing valve 3, and the inner surface of one end of the main body 1 is detachably connected to the outer surface of one end of the three-way proportional pressure-reducing valve 3 through the first fixed thread. The three-way proportional pressure-reducing valve 3 and the throttle controller can reduce the pump flow and realize automatic speed reduction.

[0030] Furthermore, a second fixed thread is provided between the main body 1 and the main control valve assembly 4, and the inner surface of one end of the main body 1 is detachably connected to the outer surface of one end of the main control valve assembly 4 through the second fixed thread. The main control valve assembly 4 is mainly used for connecting and installing the first brake solenoid valve 5 and the second brake solenoid valve 6.

[0031] Furthermore, fixing nuts are provided between the main control valve assembly 4 and the first brake solenoid valve 5 and the second brake solenoid valve 6. The upper end outer surface of the main control valve assembly 4 is detachably connected to the outer surfaces of one end of the first brake solenoid valve 5 and the second brake solenoid valve 6 through the fixing nuts. The number of the first brake solenoid valve 5 is two groups. The second brake solenoid valve 6 can slowly increase the braking force and automatically stop slowly. The first brake solenoid valve 5 can instantly increase the braking force and automatically stop suddenly.

[0032] Furthermore, a cross screw is provided between the speed limiting mechanism 8 and the speed limiting frame 7, and the inner surface of one end of the speed limiting mechanism 8 is detachably connected to the outer surface of one end of the speed limiting frame 7 through the cross screw, and the speed limiting mechanism 8 mainly plays a speed limiting effect.

[0033] Furthermore, a fixed groove is provided between the speed limiting mechanism 8 and the traveling wheel 9, and the inner surface of one end of the speed limiting mechanism 8 is detachably connected to the outer surface of one end of the traveling wheel 9 through the fixed groove. There are two groups of traveling wheels 9, and the traveling wheels 9 are mainly used for driving.

[0034] Furthermore, the first brake solenoid valve 5 does not have a throttling function, the second brake solenoid valve 6 has a throttling function, the speed limiting device 2 is a centrifugal speed limiter, the speed limiting device 2 can instantly increase the braking force, and can perform a mechanical emergency stop.

[0035] Furthermore, a Pozidriv screw is provided between the main body 1 and the speed limiting device 2, and the upper end outer surface of the main body 1 is detachably connected to the outer surface of one end of the speed limiting device 2 via the Pozidriv screw. The number of speed limiting devices 2 is two groups, and the centrifugal speed limiter adopted by the speed limiting device 2 has a better speed limiting effect when in use.

[0036] It should be noted that the present invention is a novel explosion-proof diesel engine monorail crane braking system. When in use, the first brake solenoid valve 5 does not have a throttling function, and the second brake solenoid valve 6 has a throttling function. When the locomotive speed exceeds 11-13% of the maximum allowable operating speed, the brake solenoid valve without a throttling function opens, the brake cylinder loses pressure, and the locomotive automatically stops. When the locomotive speed exceeds 8-10% of the maximum allowable operating speed, the brake solenoid valve with a throttling function opens, the brake cylinder slowly loses pressure, and the locomotive automatically stops slowly. When the locomotive speed exceeds 5-7% of the maximum allowable operating speed, the system controls the output pressure of the three-way proportional pressure reducing valve 3 to adjust the displacement of the pump, and at the same time controls the engine throttle opening to reduce the engine speed and automatically decelerate. When the locomotive speed exceeds 14-15% of the maximum allowable operating speed, the centrifugal speed limiter is triggered, the brake cylinder loses pressure, and the locomotive automatically stops, which is more practical.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A novel explosion-proof diesel engine monorail crane braking system, comprising a main body (1), characterized in that: A speed limiting device (2) is arranged on the outer surface of the upper end of the main body (1), a three-way proportional pressure reducing valve (3) and a main control valve assembly (4) are arranged in the middle of the main body (1), the main control valve assembly (4) is located on one side of the three-way proportional pressure reducing valve (3), a first brake solenoid valve (5) and a second brake solenoid valve (6) are arranged on the outer surface of the upper end of the main control valve assembly (4), the first brake solenoid valve (5) is located on one side of the second brake solenoid valve (6), the speed limiting device (2) comprises a speed limiting frame (7), a speed limiting mechanism (8) and a running wheel (9), the speed limiting mechanism (8) and the running wheel (9) are both located in the middle of the speed limiting frame (7), and the running wheel (9) is located on both sides of the speed limiting mechanism (8); A first fixing thread is provided between the main body (1) and the three-way proportional pressure reducing valve (3), and an inner surface of one end of the main body (1) is detachably connected to an outer surface of one end of the three-way proportional pressure reducing valve (3) via the first fixing thread; A second fixing thread is provided between the main body (1) and the main control valve assembly (4), and an inner surface of one end of the main body (1) is detachably connected to an outer surface of one end of the main control valve assembly (4) via the second fixing thread; A fixing nut is provided between the main control valve assembly (4) and the first brake solenoid valve (5) and the second brake solenoid valve (6); the upper end outer surface of the main control valve assembly (4) is detachably connected to the outer surface of one end of the first brake solenoid valve (5) and the second brake solenoid valve (6) through the fixing nut; and the number of the first brake solenoid valve (5) is two groups; A cross screw is provided between the speed limiting mechanism (8) and the speed limiting frame (7), and an inner surface of one end of the speed limiting mechanism (8) is detachably connected to an outer surface of one end of the speed limiting frame (7) via the cross screw; A fixing groove is provided between the speed limiting mechanism (8) and the running wheel (9); the inner surface of one end of the speed limiting mechanism (8) is detachably connected to the outer surface of one end of the running wheel (9) through the fixing groove; and the number of the running wheels (9) is two sets; The first brake solenoid valve (5) does not have a throttling function, the second brake solenoid valve (6) has a throttling function, and the speed limiting device (2) is a centrifugal speed limiter; A Pozidriv screw is provided between the main body (1) and the speed limiting device (2); the outer surface of the upper end of the main body (1) is detachably connected to the outer surface of one end of the speed limiting device (2) via the Pozidriv screw; and the number of the speed limiting devices (2) is two groups.

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