An overspeed brake vehicle for rack rail track vehicles

Abstract

The present invention belongs to the technical field of mining machinery, and specifically relates to an overspeed brake vehicle for a rack rail track vehicle. It comprises: a base frame, both ends of the base frame are provided with a load-bearing wheel group and a driving assembly; the load-bearing wheel group is placed on the track; the driving assembly is adapted to the rack rail; a top frame, the top frame is arranged above the base frame, and both ends are provided with a brake assembly, the brake assembly is located on the outside of the track, and is suitable for pressing the track when the top frame moves down; an elastic assembly is arranged between the base frame and the top frame; an overspeed protector, including a speed limiting assembly and an executive component; one end of the executive component is connected to the top frame, and the other end is connected to the base frame, and is suitable for driving the top frame to move up and down; the speed limiting assembly is arranged on the base frame and connected to the executive component, and is suitable for driving the executive component when the base frame is overspeeding. The brake structure of the above structure is compact, and the center of gravity of the entire overspeed brake vehicle is low, thereby avoiding the rollover phenomenon caused by the brake vehicle being top-heavy when transporting heavy objects, and then making the rack rail track vehicle run stably.

Description

Technical Field

[0001] The invention belongs to the technical field of mining machinery, and in particular relates to an overspeed brake vehicle for a rack rail clamping vehicle. Background Art

[0002] In the field of domestic auxiliary transportation of coal mines, rail transportation has been paid more and more attention. Among them, the rail track system developed based on the ground rail has also been widely used in China. The rack locomotive uses the principle of gear rack transmission. A rack parallel to the track is installed between two ordinary tracks as a rack. When the locomotive is running, in addition to the traction formed by the adhesion between the wheels and the track, 1 to 2 sets of driving gears (and brake devices) are added to mesh with the rack to increase the traction and braking force. In this way, the locomotive still uses ordinary tracks on flat roads and relies on adhesion to pull the train; on the slope, it uses the driving force formed by the gear rack plus adhesion at a lower speed (actually the former is the main one), which makes it have the characteristics of compact structure, high transmission efficiency, safety and reliability, good maneuverability, large traction, long transportation distance, and strong adaptability to the tunnel.

[0003] However, the current rack rail car is driven by a hydraulic motor driving a gear meshing with the rack rail, and the brake is achieved by a brake caliper and a brake disc arranged outside the gear, such as Chinese patent CN109532923A. The drive device and brake device of this structure have the following disadvantages: 1) When the running speed of the rack rail car is constant, the power of the hydraulic motor is inversely proportional to the diameter of the gear, which makes the driving gear in the drive device larger in diameter. The larger gear diameter increases the center of gravity of the rack rail brake car, which makes it easy to be top-heavy when loaded, and then rollover and other safety accidents occur; 2) Braking is achieved by the driving brake caliper and the brake disc meshing with the running gear. Once the structure of the brake disc, brake caliper or driving brake caliper or brake disc has problems, the entire rack rail car will not be able to achieve braking, which will cause safety accidents such as derailment of the rack rail car.

[0004] Therefore, in view of the above shortcomings, the present invention is in urgent need of providing an overspeed brake vehicle for a rack rail car. Summary of the invention

[0005] The object of the present invention is to provide an overspeed brake vehicle for a rack rail clamping vehicle, so as to solve the problem that the rack rail clamping vehicle has potential safety hazards due to defects in the driving structure and the braking structure in the prior art.

[0006] The overspeed brake vehicle for a rack rail car provided by the present invention comprises: a base frame, both ends of the base frame are provided with brake assemblies, the brake assemblies are located on the outer side of the rail, and are suitable for pressing the rail when the base frame moves up; a top frame, the top frame is arranged above the base frame, and both ends are provided with a load-bearing wheel group and a driving assembly; the load-bearing wheel group is placed on the rail; the driving assembly is adapted to the rail, and is suitable for driving the top frame to move on the rail; an elastic assembly comprises a piston cylinder and a spring; the piston cylinder is located below the base frame, and the piston passes through the base frame and is connected to the top frame; one end of the spring is connected to the base frame, and the other end is connected to the base of the piston cylinder, and when the piston is extended, the spring is in a compressed state; an overspeed protector comprises a speed limiting assembly and an executive component; one end of the executive component is connected to the top frame, and the other end is connected to the base frame, and is suitable for driving the top frame to move up and down; the speed limiting assembly is arranged on the base frame and connected to the executive component, and is suitable for driving the executive component when the base frame is overspeeding.

[0007] The overspeed brake vehicle for rack rail vehicles as described above is further preferably that the overspeed protector also includes a hydraulic control component, the hydraulic control component includes a tank component, a control oil circuit, an execution oil circuit and a quick release valve; the control oil circuit is arranged between the tank component and the speed limiting component, and the execution oil circuit is arranged between the tank component and the execution component; the quick release valve is respectively connected to the control oil circuit and the execution oil circuit, and is used to adjust the oil pressure of the execution oil circuit according to the oil pressure of the control oil circuit.

[0008] The overspeed brake vehicle for a rack rail vehicle as described above is further preferably provided with an overflow valve, a first control valve and a second control valve in the control oil circuit, the overflow valve being used to control the pressure of the control oil circuit; the first control valve is connected to the speed limiting component, one end of the second control valve is connected to the quick release valve, and the other end is linked to the first control valve.

[0009] The overspeed brake vehicle for rack rail vehicles as described above is further preferably that the drive assembly includes a motor and a drive wheel, the motor is mounted on the top frame, and the output shaft is connected to the drive wheel; the speed limiting assembly includes a centrifugal releaser and a wheel-throwing valve group; the wheel-throwing valve group includes a valve body and a valve block; the valve body and the first control valve are mounted on the valve block, and the valve body can slide relative to the valve block to move away from or close to the valve block, and drive the valve core of the first control valve to control the first control valve when approaching the valve block; the centrifugal releaser is mounted on the output shaft, and the outer peripheral edge is located on the outside of the valve body, suitable for driving the valve body.

[0010] As described above, the overspeed brake vehicle for a rack rail vehicle is further preferably configured such that the number of the first control valves is two, and the two control valves are connected in parallel in the control oil circuit.

[0011] The overspeed brake vehicle for rack rail vehicles as described above is further preferably provided with a groove, a protrusion and an inclined surface on the working surface of the valve body, and the inclined surface is located between the groove and the protrusion; the groove corresponds to one of the first control valves, and the protrusion corresponds to another of the first control valves; a manual actuator is also provided on the side wall of the valve body, and the manual actuator is suitable for pulling the valve body so that the inclined surface drives the valve core of the first control valve to control the first control valve.

[0012] The overspeed brake vehicle for rack rail vehicles as described above is further preferably configured such that the overspeed protector is also provided with a minimum pressure valve, one end of the minimum pressure valve is connected to the control oil circuit, and the other end is connected to the execution oil circuit; the execution oil circuit is also provided with a first stop valve and a second stop valve, and the first stop valve and the second stop valve are connected in series.

[0013] The overspeed brake vehicle for rack rail vehicles as described above is further preferably that the brake assembly includes a brake arm, a brake shoe and a mounting card; the brake arm includes a swing arm and a brake arm connected in an L shape, the end of the swing arm is mounted on the base frame, the brake shoe is mounted on the upper surface of the brake arm through the mounting card, and the upper surface of the brake shoe is adapted to the rail.

[0014] The overspeed brake vehicle for rack rail vehicles as described above is further preferably further comprised of a main body, the main body comprising two top frames and four bottom frames, each of the bottom frames being provided with a driving assembly and a load-bearing wheel group, and each of the top frames being provided with two brake assemblies; the four bottom frames are divided into two groups, the two bottom frames in each group being connected by a pivot shaft for adapting to the two rails; each group of the bottom frames being provided with a top frame.

[0015] The overspeed brake vehicle for the rack rail vehicle as described above is further preferably provided with a guide assembly on the top frame, the guide assembly comprising a connecting frame and a guide wheel, the upper end of the connecting frame is mounted on the top frame, the lower end is mounted with the guide wheel, the guide wheel is located outside the rail, and a gap is provided between the wheel rim of the guide wheel and the rail.

[0016] The overspeed brake vehicle for the rack rail vehicle as described above is further preferably provided with two top frames, each of which is provided with a bottom frame at the bottom of each top frame; each of the top frames is provided with two load-bearing wheel sets and one drive assembly, and each of the two drive assemblies corresponds to one rail; each of the bottom frames is provided with four brake assemblies, and the four brake assemblies are arranged at both ends of the bottom frame.

[0017] The overspeed brake vehicle for rack rail track vehicles disclosed in the present invention includes a chassis, a fixing device and an overspeed protector, wherein both ends of the top frame are provided with a load-bearing wheel group and a driving assembly; the bottom frame is arranged below the bottom frame, and both ends are provided with a brake assembly; an elastic assembly is arranged between the top frame and the bottom frame, and the compression of the elastic assembly can change the position of the top frame and the bottom frame; the overspeed protector includes a speed limiting assembly and an executive component, and one end of the executive component is connected to the top frame, and the other end is connected to the bottom frame, suitable for driving the top frame to move up and down, and the speed limiting assembly is arranged on the bottom frame and connected to the executive component, suitable for driving the executive component when the bottom frame is overspeeding. That is, in the above structure, by providing an executive component, a speed limiting component and an elastic component that can drive the top frame to move up and down, the top frame is driven to move up and down relative to the bottom frame, thereby driving the brake assembly to move up and down, and then achieving a clamping brake with the track. The brake structure of the above structure is compact and the center of gravity of the entire overspeed brake vehicle is low, thereby avoiding the rollover phenomenon caused by the brake vehicle being top-heavy when transporting heavy objects in the prior art, and then making the entire structure stable.

[0018] In the present invention, the brake arms and guide components of the brake assembly are arranged on both sides of the rail and can be matched with the top surface of the rail, so that the rail can be clamped when the overspeed brake vehicle tilts to avoid rollover.

[0019] In the present invention, the overspeed protector also includes a hydraulic control component, which improves the accuracy and sensitivity of the control circuit by controlling the large pressure circuit with a small pressure circuit; in addition, the hydraulic control component is provided with a plurality of manually controllable valves and triggers, realizing the combination of manual control and automatic control, thereby improving the operating safety of the hydraulic control component. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a front view of the overspeed brake vehicle used for the rack rail clamping vehicle in the present invention;

[0022] Figure 2 A top view of an overspeed brake vehicle for a rack rail clamping vehicle in the present invention;

[0023] Figure 3 A bottom view of the overspeed brake vehicle used for the rack rail clamping vehicle in the present invention;

[0024] Figure 4 It is a left side view of the overspeed brake vehicle used for the rack rail clamping vehicle in the present invention;

[0025] Figure 5 In braking state Figure 2 The cross-sectional structure diagram of AA in the middle;

[0026] Figure 6 In non-braking state Figure 2 The cross-sectional structure diagram of AA in the middle;

[0027] Figure 7 It is a control diagram of the hydraulic control system in the present invention.

[0028] Description of reference numerals:

[0029] 1-track, 2-rail, 3-tooth rail, 4-top frame, 5-bottom frame, 6-driving wheel, 7-load-bearing wheel, 8-brake arm, 9-brake shoe, 10-connecting frame, 11-guide wheel, 12-connecting bolt, 13-brake cylinder, 14-elastic component, 15-motor, 16-oil tank, 17-disc spring, 18-piston cylinder, 19-output shaft, 20-centrifugal releaser, 21-valve body, 22-mounting card, 23-first control valve, 24-thrower valve group, 25-mounting block, 26-cross bar, 27-manual actuator, 28-manual pump, 29-pneumatic pump, 30-hydraulic oil tank, 31-pressure gauge, 32-throttle valve; 33-second control valve; 34-minimum pressure valve, 35-high pressure filter, 37-quick release valve; 38-pressure limiting valve, 39-first stop valve, 40-second stop valve. DETAILED DESCRIPTION

[0030] The overspeed brake vehicle disclosed in this embodiment is mainly used for a rack rail vehicle, wherein the track 1 for carrying the rack rail vehicle includes two rails 2 and a rack rail 3 , wherein the two rails 2 are respectively located on both sides of the rack rail 3 .

[0031] Figure 1 1 is a front view of the overspeed brake vehicle for the rack rail vehicle in this embodiment. Figure 2 FIG. 1 is a top view of the overspeed brake vehicle for the rack rail clamping vehicle in this embodiment. Figure 3 A bottom view of the overspeed brake vehicle used for the rack rail clamping vehicle in the present invention; Figure 4 FIG. 2 is a left side view of the overspeed brake vehicle used for the rack rail vehicle in the present invention. Figure 1-4As shown, the overspeed brake vehicle for a rack rail vehicle disclosed in this embodiment includes:

[0032] A base frame 5, wherein both ends of the base frame 5 are provided with brake assemblies, and the brake assemblies are located outside the rail 2, and are suitable for pressing the rail 2 when the base frame 5 moves upward;

[0033] A top frame 4, the top frame 4 is arranged above the bottom frame 5, and is provided with a load-bearing wheel group and a driving assembly at both ends; the load-bearing wheel group is placed on the rail 2; the driving assembly is adapted to the rail 2 and is suitable for driving the top frame 4 to move on the rail 2;

[0034] The elastic component 14 includes a piston cylinder 18 and an elastic body; the piston cylinder 18 is located below the bottom frame 5, and the piston passes through the bottom frame 5 and is connected to the top frame 4; one end of the elastic body is connected to the bottom frame 5, and the other end is connected to the base of the piston cylinder, and when the piston is extended, the elastic body is in a compressed state;

[0035] The overspeed protector comprises a speed limiting component and an executive component; one end of the executive component is connected to the top frame 4, and the other end is connected to the bottom frame 5, suitable for driving the top frame 4 to move up and down; the speed limiting component is arranged on the bottom frame 5 and connected to the executive component, suitable for driving the executive component when the bottom frame 5 is overspeeding.

[0036] Specifically, in this embodiment, the number of the top frames 4 is two, and the two top frames 4 are connected front and back through a pivot (with the forward direction of the overspeed brake vehicle as a reference standard), and each of the top frames 4 is connected to a bottom frame 5 through an actuator and an elastic component 14. The above connection method is used to enable the overspeed brake vehicle to adapt to different shapes of tracks 1, thereby allowing the overspeed brake vehicle to travel normally. Further, each of the top frames 4 is provided with a driving component and two load-bearing wheel groups, and the two load-bearing wheel groups on each of the top frames 4 are respectively adapted to the two rails 2, and the two driving components on the two bottom frames 5 are respectively adapted to the two rails 2; two brake components are provided at both ends of each bottom frame 5. The number of the speed limiting components is two groups, corresponding to the two driving components respectively, and used to monitor the two driving components respectively.

[0037] Furthermore, the load-bearing wheel group includes a load-bearing wheel 7, a cross bar 26 and a cushion block. The load-bearing wheel 7 is installed on one end of the cross bar 26 through the rolling bearing, and the other end of the cross bar 26 is installed on the adjustment block of the top frame 4 through a screw. The adjustment block is used to adjust the height between the cross bar 26 and the top frame 4, and the cushion block is provided between the cross bar 26 and the adjustment block. In the above structure, the cross bar 26 can rotate relative to the top frame 4, and the load-bearing wheel 7 can rotate relative to the cross bar 26. Through the arrangement of the above structure, the load-bearing wheel group can not only carry the overspeed brake vehicle and the load, but also adjust the relative position with the top frame 4 according to the shape of the track 1, and then adapt to the two rails 2, so as to facilitate the handling of uneven, inclined or curved tracks 1.

[0038] The driving assembly includes a motor 15 and a driving wheel 6, wherein the motor 15 is mounted on the top frame 4, and an output shaft 19 is connected to the driving wheel 6; the driving wheel 6 contacts the top surface of the rail 2, and drives the overspeed brake vehicle to move on the rack rail 3 rail 2 through friction.

[0039] Furthermore, in the above structure, the brake assembly includes a brake arm 8, a brake shoe 9 and a mounting card 22; the brake arm 8 includes a swing arm and a brake arm connected in an L shape, the end of the swing arm is mounted on the base frame 5, the brake shoe 9 is mounted on the upper surface of the brake arm through the mounting card 22, and the upper surface of the brake shoe 9 is adapted to the rail 2. In this embodiment, the swing arm moves up and down with the base frame 5 under the action of the elastic component 14, and is pressed against the top of the rail 2 when moving upward to achieve braking.

[0040] Furthermore, in the above structure, the actuator is a brake cylinder 13, the base of the brake cylinder 13 is connected to the top frame 4, and the piston rod is connected to the bottom frame 5. The piston and piston rod in the brake cylinder 13 divide the hydraulic chamber into two parts, one of which is connected to the oil tank assembly through the actuator oil circuit.

[0041] Furthermore, in the above structure, the top frame 4 is also provided with a guide assembly, and the guide assembly includes a connecting frame 10 and a guide wheel 11. The upper end of the connecting frame 10 is fixedly mounted on the top frame 4. Specifically, the upper end of the connecting frame 10 is fixedly mounted on the mounting block 25 on the lower surface of the top frame 4, and the lower end is provided with the guide wheel 11. The guide wheel 11 is located outside the rail 2, and a gap is provided between the wheel rim of the guide wheel 11 and the rail 2. Preferably, the guide wheel 11 is installed at an angle, and the inner wheel rim is inclined upward, which is suitable for matching the corner of the outer side of the rail 2 when the overspeed brake vehicle is in the driving state, and has a gap with the outer side of the rail 2 when the overspeed brake vehicle is in the braking state.

[0042] Two brake cylinders 13 and four elastic components 14 are provided between each of the top frame 4 and the bottom frame 5, and the two brake cylinders 13 and the four elastic components 14 are arranged in a rectangle. In the rectangle, one brake cylinder 13 and two elastic components 14 form a side, and the two brake cylinders 13 are located at the diagonals of the rectangle.

[0043] Furthermore, the elastic body in the elastic component 14 is a plurality of disc springs 17 , and the disc springs 17 are sleeved on the outer side of the piston cylinder 18 .

[0044] Furthermore, both ends of the overspeed brake vehicle of this embodiment are provided with connection structures, and the connection structures are provided with connection bolts 12 for connecting the overspeed brake vehicle with other parts of the rail-carrying vehicle.

[0045] Furthermore, in the above structure, the overspeed protector also includes a hydraulic control component, which includes a tank assembly, a control oil circuit, an execution oil circuit and a quick release valve 37; the control oil circuit is arranged between the tank assembly and the speed limit assembly, and the execution oil circuit is arranged between the tank assembly and the execution component; the quick release valve 37 is respectively connected to the control oil circuit and the execution oil circuit, and is used to adjust the oil pressure of the execution oil circuit according to the oil pressure of the control oil circuit.

[0046] In this embodiment, the oil tank assembly includes a hydraulic oil tank 30, a pneumatic pump 29 and a manual pressure pump, wherein the pneumatic pump 29 and the manual pressure pump are respectively connected to the hydraulic oil tank 30. The pneumatic pump 29 is an electric structure, and the manual pressure pump is a manual structure. The two have the same function and can pressurize the hydraulic oil tank 30 separately to increase the oil pressure of the control oil circuit and the execution oil circuit.

[0047] The main function of the quick release valve 37 is to adjust the ratio of input and output pressures. In this embodiment, this characteristic of the quick release valve 37 is used to achieve the pressure difference between the execution oil circuit and the control oil pressure, thereby achieving the control of the large oil pressure in the execution oil circuit by the small oil pressure in the control oil circuit. Specifically, the quick release valve 37 is provided with two oil circuits, one is connected to the control oil circuit, and the other is connected to the execution oil circuit. The pressures at both ends of the quick release valve 37, i.e., the pressures in the control oil circuit and the execution oil circuit, remain balanced when the oil tank assembly is pressurized, thereby keeping the quick release valve 37 in a closed state. The limit of the pressurization pressure of the oil tank assembly is determined by the control oil circuit. The execution oil circuit can adjust the brake cylinder 13 so that its piston rod extends, thereby causing the bottom frame 5 to move downward relative to the top frame 4 to compress the elastomer, thereby opening the brake assembly, and the overspeed brake vehicle is in a normal operating state, such as Figure 6As shown. When a pressure relief event occurs in the control oil circuit, the pressure at both ends of the quick release valve 37 is unbalanced and opens, thereby causing the execution oil circuit to quickly relieve pressure, causing the pressure at both ends of the brake cylinder 13 to change, and the piston rod of the brake cylinder 13 loses its supporting effect and moves, and the elastic body is reset, causing the bottom frame 5 to move up, thereby causing the brake assembly to press the track 1 to achieve braking; in this process, the elastic body acts on the bottom frame 5 and the top frame 4 at the same time. When the bottom frame 5 moves up to drive the brake assembly to press the track 1, the bottom frame 5 stops moving, and the elastic body begins to pull the top frame 4 downward through the piston rod, thereby driving the top frame 4 to move downward. The downward movement of the top frame 4 can simultaneously drive the guide assembly to move downward, thereby causing a gap between the guide wheel 11 and the rail 2, as shown in FIG. Figure 5 shown.

[0048] In the above structure, an overflow valve, a first control valve 23 and a second control valve 33 are provided on the control oil circuit, and the overflow valve is used to control the pressure of the control oil circuit; the first control valve 23 is connected to the speed limiting component, one end of the second control valve 33 is connected to the quick release valve 37, and the other end is linked to the first control valve 23.

[0049] The pressure of the control oil circuit is limited by setting an overflow valve in the control oil circuit. On the one hand, it is prevented from exceeding the limit value, thereby controlling the ratio of the pressures at both ends of the quick release valve 37. On the other hand, it is used to reduce the pressure of the control oil circuit, thereby reducing the difficulty of changing the pressure of the control oil circuit and improving the accuracy of the control oil circuit. In order to achieve precise control of the oil pressure of the control oil circuit, a pressure gauge 31 is also provided in the control oil circuit to check the pressure of the control oil circuit. The control oil circuit controls the pressure relief event by setting a first control valve 23. Specifically, when the first control valve 23 is opened, rapid pressure relief can be achieved. The second control valve 33 is used to adjust the pressure on the side where the quick release valve 37 is connected to the control oil circuit. The first control valve 23 and the second control valve 33 are both arranged on the control oil circuit, and can be quickly linked to maintain the consistency of pressure relief.

[0050] In the above structure, the driving assembly includes a motor 15 and a driving wheel 6, the motor 15 is installed on the top frame 4, and the output shaft 19 is connected to the driving wheel 6; the speed limiting assembly includes a centrifugal releaser 20 and a wheel-throwing valve group 24; the wheel-throwing valve group 24 includes a valve body 21 and a valve block; the valve body 21 and the first control valve 23 are installed on the valve block, and the valve body 21 can slide relative to the valve block to move away from or approach the valve block, and drive the valve core of the first control valve 23 to control the first control valve 23 when approaching the valve block; the centrifugal releaser 20 is installed on the output shaft 19, and the outer periphery is located on the outer side of the valve body 21, suitable for driving the valve body 21. In the above structure, the centrifugal releaser 20 is a finished product structure, and its main structure is a centrifugal flyweight. When the rotating body assembly rotates at a high speed, the centrifugal flyweight is similar to a conical pendulum, generating a centrifugal phenomenon and then moving outward, and the sliding shaft connected to the centrifugal flyweight also moves outward, and the size of the outward movement distance of the sliding shaft has a corresponding relationship with the rotation speed of the rotating body assembly shaft. Then, the brake "switch" is controlled by the device installed in the axial direction of the sliding shaft, so as to achieve the purpose of triggering a safe braking response. In this embodiment, the centrifugal releaser is installed on the output shaft 19, which is used to detect the rotation speed of the driving wheel 6, and then trigger the valve body 21 when the rotation speed of the driving wheel 6 exceeds a certain range, so that the valve body 21 moves toward the valve block, and then triggers the valve core of the first control valve 23, so that the valve core of the first control valve 23 moves to open the first control valve 23, so that it can quickly release pressure.

[0051] In the above structure, there are two first control valves 23, and the two control valves are connected in parallel on the control oil circuit. In this embodiment, two first control valves 23 are provided to ensure that when one first control valve 23 has a problem, the other first control valve 23 can still allow the control oil circuit to operate safely and reliably.

[0052] In the above structure, a groove, a protrusion and an inclined surface are provided on the working surface of the valve body 21, and the inclined surface is located between the groove and the protrusion; the groove corresponds to one of the first control valves 23, and the protrusion corresponds to another of the first control valves 23; a manual actuator 27 is also provided on the side wall of the valve body 21, and the manual actuator 27 is suitable for pulling the valve body 21 so that the inclined surface drives the valve core of the first control valve 23 to control the first control valve 23. In this embodiment, by optimizing the structure of the valve body 21, the valve core of the first control valve 23 is triggered by pulling the valve body 21 without changing the relative distance between the valve body 21 and the valve block, thereby realizing manual control of the first control valve 23.

[0053] In the above structure, the overspeed protector is also provided with a minimum pressure valve 34, one end of the minimum pressure valve 34 is connected to the control oil circuit, and the other end is connected to the execution oil circuit; the execution oil circuit is also provided with a first stop valve 39 and a second stop valve 40, and the first stop valve 39 and the second stop valve 40 are connected in series. This embodiment prevents the instantaneous pressurization of the oil tank assembly from damaging the control oil circuit and the execution oil circuit by providing the minimum pressure valve 34, thereby protecting the control oil circuit and the execution oil circuit. The first stop valve 39 is provided on the top frame 4, and the second stop valve 40 is provided in the operating room. The first stop valve 39 and the second stop valve 40 are used to release the pressure of the control oil circuit through manual operation, thereby realizing the manual operation of the hydraulic control assembly.

[0054] In this embodiment, the overspeed protector and the control valves and actuators arranged on the entire oil circuit constitute a hydraulic control system. In addition, in order to improve the performance of the above hydraulic control system and ensure its normal operation, other valve bodies are also provided. Specifically, the control diagram of the entire hydraulic control system is as follows: Figure 7 shown.

[0055] Among them, after the hydraulic oil from the hydraulic oil tank is filtered by the high-pressure filter 35, it is divided into the control oil circuit and the execution oil circuit at the throttle valve 32, wherein the hydraulic oil in the execution oil circuit flows to the two brake cylinders through two quick release valves 37 respectively; the hydraulic oil in the execution oil circuit flows to the first control valve 23 and the second control valve 33 after being limited by the pressure limiting valve 38, and is connected to the quick release valve 37 through the second control valve 33. To ensure the normal operation of the control oil circuit, a pressure gauge 31 is also provided on the oil circuit. In addition, a minimum pressure valve 34 is provided between the control oil circuit and the execution oil circuit, and a first stop valve and a second stop valve are also provided on the execution oil circuit.

[0056] Furthermore, this embodiment also discloses a method for using the above-mentioned overspeed brake vehicle for the gear rack vehicle:

[0057] First, assemble the limit brake vehicle for the gear rack 3 vehicle in the above manner, and place it on the gear rack 3, with the load-bearing wheel 7 and the driving wheel 6 placed on the top of the rail 2, and the guide wheel 11 and the brake shoe 9 located outside the rail 2. At the same time, check the elastic component 14, the speed limit component, the actuator and the hydraulic control component to ensure normal operation.

[0058] Running state: The hydraulic oil tank 30 is pressurized by the pneumatic pump 29 or the manual pump 28. At the initial stage of the pressurization, the pressure in the oil circuit is reduced, the minimum pressure valve 34 is in the open state, and the control oil circuit and the execution oil circuit are connected. When the pressure in the oil circuit gradually increases and exceeds the set value of the minimum pressure valve 34, the minimum pressure valve 34 is closed. The oil from the pressurizing pump passes through the high-pressure filter 35 and flows to the control oil circuit and the execution oil circuit respectively. Among them, because the control oil circuit is provided with a throttle valve 32, most of the oil flows into the execution oil circuit during the pressurization, and flows into the brake cylinder 13 through the quick release valve 37 in the execution oil circuit. After the pressure reaches the set value, the piston of the brake cylinder 13 moves, driving the chassis 5 to move downward, compressing the elastomer, separating the brake assembly from the rail 2, and then making the brake assembly inoperative. The hydraulic oil passing through the throttle valve 32 flows to the first control valve 23 and the second control valve 33 through a pressure limiting valve 38. At this time, the first control valve 23 and the second control valve 33 are both in a closed state. Since one end of the second control valve 33 is connected to the quick release valve 37, the quick release valve 37 controls the upper and lower pressures of the chamber to maintain balance and is thus in a closed state. When the pressure in the execution oil circuit and the control oil circuit reaches the set value, the pneumatic pump 29 or the manual pump 28 stops pressurizing, and the pressure of the entire system is maintained within a certain value.

[0059] Braking state: When the speed of the output shaft 19 in the drive assembly exceeds the set value, the hammer of the centrifugal releaser 20 is thrown out, driving the valve body 21 to move toward the valve block, and opening the valve core of the first control valve 23 when approaching the valve block, so that the first control valve 23 is in an open state. At this time, the control oil circuit is quickly depressurized, driving the second control valve 33 to synchronously depressurize, and then making the pressure at the upper and lower ends of the quick release valve 37 unbalanced, and the pressure at the lower end is large. The valve core of the quick release valve 37 moves to the open position, and the quick release valve 37 quickly releases pressure, executing the oil circuit quickly depressurizes, and the brake cylinder 13 cannot achieve pressure balance. The piston rod moves, the spring resets, and drives the bottom plate to move upward, thereby driving the brake assembly to move upward to press the track 1 through the brake shoe 9 to achieve braking.

[0060] In addition, the first stop valve 39, the second stop valve 40 and the manual actuator 27 provided on the execution oil circuit and the wheel-swinging valve group 24 can also achieve rapid pressure relief, thereby achieving braking; when the above-mentioned braking system fails, the overspeed braking vehicle can also be in a braking state under the action of the elastomer.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An overspeed brake vehicle for a rack rail vehicle, It is characterized in that include: A base frame, wherein both ends of the base frame are provided with brake assemblies, the brake assemblies are located outside the rails, and are suitable for pressing the rails when the base frame moves upward; A top frame, which is arranged above the bottom frame and has a load-bearing wheel set and a driving assembly at both ends; The load-bearing wheel set is placed on the rail; the driving assembly is adapted to the rail and is suitable for driving the top frame to move on the rail; An elastic component, comprising a piston cylinder and an elastic body; the piston cylinder is located below the bottom frame, and the piston passes through the bottom frame and is connected to the top frame; one end of the elastic body is connected to the bottom frame, and the other end is connected to the base of the piston cylinder, and when the piston is extended, the elastic body is in a compressed state; The overspeed protector comprises a speed limiting component and an execution component; one end of the execution component is connected to the top frame, and the other end is connected to the bottom frame, and is suitable for driving the top frame to move up and down; the speed limiting component is arranged on the bottom frame and connected to the execution component, and is suitable for driving the execution component when the bottom frame is overspeeding; The brake assembly includes a brake arm, a brake shoe and a mounting card; the brake arm includes a swing arm and a brake arm connected in an L shape, the end of the swing arm is mounted on the base frame, the brake shoe is mounted on the upper surface of the brake arm through the mounting card, and the upper surface of the brake shoe is adapted to the top of the rail; The swing arm moves up and down together with the base frame under the action of the elastic component, and during the upward movement, the upper surface of the brake shoe is pressed against the top of the rail to achieve braking.

2. The overspeed brake vehicle for a rack rail vehicle according to claim 1, It is characterized in that The overspeed protector also includes a hydraulic control component, which includes a tank component, a control oil circuit, an execution oil circuit and a quick release valve; the control oil circuit is arranged between the tank component and the speed limit component, and the execution oil circuit is arranged between the tank component and the execution component; the quick release valve is respectively connected to the control oil circuit and the execution oil circuit, and is used to adjust the oil pressure of the execution oil circuit according to the oil pressure of the control oil circuit.

3. The overspeed brake vehicle for a rack rail vehicle according to claim 2, It is characterized in that The control oil circuit is provided with an overflow valve, a first control valve and a second control valve, the overflow valve is used to control the pressure of the control oil circuit; the first control valve is connected to the speed limiting component, one end of the second control valve is connected to the quick release valve, and the other end is linked to the first control valve.

4. The overspeed brake vehicle for a rack rail vehicle according to claim 3, It is characterized in that The driving assembly includes a motor and a driving wheel, the motor is mounted on the top frame, and the output shaft is connected to the driving wheel; The speed limiting component includes a centrifugal releaser and a wheel-throwing valve group; the wheel-throwing valve group includes a valve body and a valve block; the valve body and the first control valve are installed on the valve block, and the valve body can slide relative to the valve block to move away from or close to the valve block, and drive the valve core of the first control valve to control the first control valve when approaching the valve block; the centrifugal releaser is installed on the output shaft, and the outer peripheral edge is located on the outer side of the valve body, suitable for driving the valve body.

5. The overspeed brake vehicle for a rack rail vehicle according to claim 4, It is characterized in that The number of the first control valves is two, and the two control valves are connected in parallel on the control oil circuit.

6. The overspeed brake vehicle for a rack rail vehicle according to claim 5, It is characterized in that A groove, a protrusion and an inclined surface are provided on the working surface of the valve body, and the inclined surface is located between the groove and the protrusion; the groove corresponds to one of the first control valves, and the protrusion corresponds to another of the first control valves; A manual actuator is also provided on the side wall of the valve body, and the manual actuator is suitable for pulling the valve body so that the inclined surface drives the valve core of the first control valve to control the first control valve.

7. The overspeed brake vehicle for a rack rail vehicle according to claim 3, It is characterized in that The overspeed protector is also provided with a minimum pressure valve, one end of which is connected to the control oil circuit, and the other end of which is connected to the execution oil circuit; The execution oil circuit is also provided with a first stop valve and a second stop valve, and the first stop valve and the second stop valve are connected in series.

8. The overspeed brake vehicle for a rack rail vehicle according to claim 7, It is characterized in that The top frame is also provided with a guide assembly, which includes a connecting frame and a guide wheel. The upper end of the connecting frame is installed on the top frame, and the guide wheel is installed on the lower end. The guide wheel is located outside the rail, and a gap is provided between the wheel rim of the guide wheel and the rail.

9. The overspeed brake vehicle for a rack rail vehicle according to claim 8, It is characterized in that There are two top frames, and a bottom frame is provided at the bottom of each top frame; each top frame has two load-bearing wheel sets and one driving assembly, and each of the two driving assemblies corresponds to a rail; each bottom frame has four brake assemblies, and the four brake assemblies are arranged at both ends of the bottom frame.

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