CN217347813U - Controllable scotch block - Google Patents

Abstract

The utility model provides a controllable scotch block, the utility model relates to a scotch block, the utility model discloses a for solve among the prior art vehicle lighter and high-speed easy emergence disconnection accident when passing through the anti-skidding top, and use the great problem of wearing and tearing of anti-skidding top part when anti-skidding top, it includes casing, stud, cable checkpost, nut, slip hydro-cylinder and blast pipe, it still includes pressure valve seat, one-way valve plate, piston rod, pressure valve rod, return stroke valve plate, secondary speed valve plate, locking valve module, flat key secondary speed valve spring, relief valve, slide valve rod, sealed lid, pressure valve outer spring, pressure valve inner spring, flat pad, automatically controlled valve module, adjustment pad, the seat that ends towards, cylindric lock ring, filling pad and two axle circlips; the sealing cover is arranged at the bottom end of the sliding oil cylinder, the sliding oil cylinder and the adjusting pad are arranged in the shell, the exhaust pipe is connected with the air outlet end of the shell through the electric control valve component, and the shell and the cable clamp are arranged on the steel rail. The utility model belongs to mechanical speed governing field.

Description

Controllable scotch block

Technical Field

The utility model relates to a only the wheel top, concretely relates to controllable only wheel top belongs to mechanical speed reduction speed governing field.

Background

At present, an effective automatic wheel stopping and slipping preventing device is not available for line feeding, slipping preventing iron shoes are still used for operation, personnel are high in danger in the operation mode, slipping and shoe pulling are easily caused due to the fact that the phenomenon of neglected loading and withdrawing exists, and driving accidents caused by the fact that vehicles flow into a main line can be caused seriously. The existing common retarder is high in installation height and is not suitable for a hair line. The short wheel chock has the conditions of high failure rate and unsatisfactory safety performance.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve among the prior art vehicle lighter and take place the off-line accident easily when high-speed through preventing the swift current top, use moreover when preventing the swift current top the great problem of wearing and tearing of swift current top part, and then provide a controllable scotch block.

The technical problem is solved by the following scheme:

the double-head hydraulic control valve comprises a shell, a double-head bolt, a cable clamp, a first nut, a sliding oil cylinder, an exhaust pipe, a pressure valve seat, a one-way valve plate, a piston rod, a pressure valve rod, a return valve plate, a secondary speed valve plate, a locking valve component, a flat key, a secondary speed valve spring, a relief valve, a sliding valve rod, a sealing cover, a pressure valve outer spring, a pressure valve inner spring, a flat pad, an electric control valve component, an adjusting pad, a thrust stop seat, a cylindrical pin, a clamping ring, a filling pad and two shaft clamp springs;

the sealing cover is arranged at the bottom end of the sliding oil cylinder, the piston rod is inserted on the sealing cover, the pressure valve seat, the pressure valve rod, the sliding valve rod, the pressure valve outer spring, the pressure valve inner spring and the flat gasket are sequentially arranged at a central blind hole of the piston rod from top to bottom, the bottom end of the piston rod is connected with the impact stop seat through a cylindrical pin and a snap ring, the pressure valve seat is arranged at the top end of the piston rod in a threaded connection manner, the open end of the bottom end of the pressure valve seat is contacted with the top end of the pressure valve rod, the second-stage speed valve plate is sleeved on the pressure valve rod, the bottom end of the pressure valve rod is arranged on the sliding valve rod, a second-stage speed valve spring is arranged between the second-stage speed valve plate and the sliding valve rod, the top end of the second-stage speed valve spring is contacted with the lower end surface of the second-stage speed valve plate, the bottom end of the second-stage speed valve spring is contacted with the bottom surface of the sliding valve rod, the pressure valve outer spring is sleeved outside the pressure valve inner spring, and the top end of the pressure valve inner spring is contacted with the bottom end of the sliding valve rod, the bottom end of the pressure valve outer spring and the bottom end of the pressure valve inner spring are contacted with a flat pad at the bottom end of a blind hole of a piston rod, a plurality of through holes are uniformly and radially formed on the upper end surface of the piston rod, a one-way valve plate is sleeved on a pressure valve seat and covers the piston rod above the plurality of through holes, a return valve plate, a locking valve component, a snap spring for a first shaft, a release valve and a snap spring for a second shaft are integrally sleeved on the piston rod from top to bottom, the first shaft is clamped below the locking valve component by the snap spring, the second shaft is clamped on the release valve by the snap spring, the return valve plate is positioned below the plurality of through holes on the piston rod, the flat key is vertically embedded on the outer side wall of the piston rod, a flat key sliding groove and a flat key groove are respectively arranged on the inner side wall of the locking valve component and the inner side wall of the release valve, a sliding oil cylinder and an adjusting pad are arranged in a shell, the adjusting pad is arranged below the stop seat, and an exhaust pipe is connected with the air outlet end of the shell through an electric control valve component, the shell and the cable clamp are detachably connected and installed on the steel rail through a first double-end bolt and a first nut.

Compared with the prior art, the utility model the beneficial effect who contains is:

1. the application provides a controllable scotch block can not play the braking effect to the vehicle at the vehicle entering in-process, can automatic scotch block when the vehicle reachs preset position. When the vehicle is pulled out at high speed, the vehicle is locked below the steel rail; the mounting height is low, satisfies the on-the-spot operation requirement of departure line, controls the retarder through the mode that two kinds of complete solitary automatically controlled valve module combine together, when can providing the wheel stopping and prevent swift current effect, guarantees the security of retarder to the vehicle.

2. The secondary critical speed structure can improve the pulling speed and the transportation efficiency of the vehicle, reduce the energy consumption required by the traction of the locomotive and reduce the unnecessary abrasion of each part of the retarder.

3. The piston is provided with a one-way valve plate, and when the wheels are over the top, the upper cavity of the sliding oil cylinder can quickly build pressure.

4. When the top is at the locking position, the sliding oil cylinder rises upwards due to the expansion of the compressed nitrogen in the upper cavity, the unlocking mechanism is pushed to unlock, and the action is stable and reliable.

5. The pressure valve adopts a ball valve, and the pressure can be adjusted. When the speed of the overhead vehicle is lower than the second-stage critical speed, the high-pressure ball valve is opened, and the high-pressure ball valve has higher pressure and braking power. When the speed of the overhead vehicle is higher than the second-stage critical speed, the second-stage speed valve is closed, the pressure is low, the counter force is small, and high-speed locking is realized.

6. An integrated locking valve component structure is adopted, and a built-in spring pushes a steel ball to generate pre-pressure to fall into a pit arranged on the wall of a piston rod, so that the unlocking and locking stability is improved.

7. The two completely independent modes of combining the electric control valve assemblies control the retarder, and the safety of the retarder to a vehicle is guaranteed while the wheel-stopping anti-slip effect can be provided. The electronic control valve assembly 20 can realize accurate control on the sliding oil cylinder. Two kinds of control combine together and can realize the accurate control when external energy, break down when external energy, like the power condition of opening a circuit, can high-speed locking through second grade speed valve, guarantee vehicle safety. The full automation of the vehicle in and out is realized.

Drawings

Fig. 1 is a front view of the overall structure of the present application.

Fig. 2 is a front view of the lock valve 47 with the positioning ball sleeve 48, the positioning steel ball 49, and the positioning spring 50 attached.

Fig. 3 is a schematic diagram showing that hydraulic oil flows into the lower chamber of the spool rod 14 through the edge of the secondary speed valve plate 8 and the through-hole of the spool rod 14 in the deceleration braking state and flows into the lower chamber of the slide cylinder 38 through the lower through-hole of the piston rod 26, and the flow direction of the hydraulic oil is indicated by an arrow in the diagram.

Fig. 4 is a schematic diagram of the hydraulic oil in the lower chamber of the slide cylinder 38 returning to the upper chamber of the slide cylinder 38, and the arrows indicate the upward flow direction of the hydraulic oil.

Fig. 5 is a schematic diagram showing that when the vehicle passes through the vehicle at the second critical speed higher than the top, the hydraulic oil on the top flows into the upper cavity of the slide valve rod 14 from the upper cavity of the slide cylinder 38 through the pressure valve rod 5 by the wheels, and then flows into the lower cavity of the slide cylinder 38 through the flow hole along the upper part of the piston rod 26, and the arrow shows the downward flow path of the hydraulic oil.

Fig. 6 is a schematic diagram of hydraulic oil being sprayed to the outer side surface of the first inclined flow hole of the lock valve 47 to rotate the lock valve 47 counterclockwise by a certain angle.

Fig. 7 is a schematic diagram of a concave pit of a steel ball 49 on the locking valve 47 entering a corresponding position on the return valve plate 7 after rotation.

Fig. 8 is a schematic structural diagram of the structure that when the relief valve 13 is pushed by the sealing cover 17 to slowly rise back to the nearly highest position under the action of the micro-leakage control of the sliding oil cylinder 38, the upright on the relief valve 13 will abut against the inclined surface of the locking valve assembly 9 to force the locking valve assembly 9 to rotate clockwise by a certain angle.

Fig. 9 is a schematic diagram of the relief valve 13 rising, the lock valve 47 rotating clockwise and returning to the normal position, and the steel ball 49 on the lock valve 47 entering the corresponding pit on the return valve plate 7.

FIG. 10 is a schematic view of the anti-slide top of the present application.

Fig. 11A is a schematic view of the electronically controlled valve assembly 20 valve opening when the integral glue valve 205 is raised.

Fig. 11B is a schematic view of the electronically controlled valve assembly 20 valve closing when the integral glue valve 205 is lowered.

Fig. 12 is an enlarged view at a in fig. 1.

Fig. 13 is a schematic view of the split pin 44, the impact stop pin 46 and two fifth type 0 o-rings 45 before they are mounted in the housing 27.

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 13, and the controllable scotch block comprises a shell 27, a stud bolt 36, a cable clamp 37, a first nut 35, a sliding oil cylinder 38 and an exhaust pipe 39, and further comprises a pressure valve seat 1, a one-way valve plate 2, a piston rod 26, a pressure valve rod 5, a return valve plate 7, a secondary speed valve plate 8, a locking valve assembly 9, a flat key 10, a secondary speed valve spring 12, a relief valve 13, a sliding valve rod 14, a sealing cover 17, a pressure valve outer spring 18, a pressure valve inner spring 19, a flat pad 30, an electronic control valve assembly 20, an adjusting pad 21, a scotch seat 22, a cylindrical pin 23, a snap ring 24, a filling pad 25 and two shaft snap springs 11;

the sealing cover 17 is installed on the bottom end of the sliding oil cylinder 38, the piston rod 26 is inserted on the sealing cover 17, the pressure valve seat 1, the pressure valve rod 5, the sliding valve rod 14, the pressure valve outer spring 18, the pressure valve inner spring 19 and the flat gasket 30 are sequentially installed at the center blind hole of the piston rod 26 from top to bottom, the bottom end of the piston rod 26 is connected with the impact stop seat 22 through the cylindrical pin 23 and the snap ring 24, the pressure valve seat 1 is installed on the top end of the piston rod 26 in a threaded connection manner, the open end of the bottom end of the pressure valve seat 1 is contacted with the top end of the pressure valve rod 5, the secondary speed valve plate 8 is sleeved on the pressure valve rod 5, the bottom end of the pressure valve rod 5 is installed on the sliding valve rod 14, the secondary speed valve spring 12 is arranged between the secondary speed valve plate 8 and the sliding valve rod 14, the top end of the secondary speed valve spring 12 is contacted with the lower end surface of the secondary valve plate 8, the bottom end of the secondary speed valve spring 12 is contacted with the bottom surface of the groove of the sliding valve rod 14, the pressure valve outer spring 18 is sleeved outside the pressure valve inner spring 19, the top end of the pressure valve outer spring 18 and the top end of the pressure valve inner spring 19 are contacted with the bottom end of the sliding valve rod 14, the bottom end of the pressure valve outer spring 18 and the bottom end of the pressure valve inner spring 19 are contacted with the flat pad 30 at the bottom end of the blind hole of the piston rod 26, a plurality of through holes are uniformly and radially processed on the upper end surface of the piston rod 26, the one-way valve plate 2 is sleeved on the pressure valve seat 1 and covers the upper part of the plurality of through holes on the piston rod 26, the return valve plate 7, the locking valve assembly 9, the clamp spring 11 for the first shaft, the relief valve 13 and the clamp spring 11 for the second shaft are integrally sleeved on the piston rod 26 from top to bottom, the clamp spring 11 for the first shaft is clamped below the locking valve assembly 9, the clamp spring 11 for the second shaft is clamped on the relief valve 13, the return valve plate 7 is positioned below the plurality of through holes on the piston rod 26, the flat key 10 is vertically embedded on the outer side wall of the piston rod 26, the inner side wall of the locking valve assembly 9 and the inner side wall of the release valve 13 are respectively provided with a flat key sliding groove and a flat key groove, the sliding oil cylinder 38 and the adjusting pad 21 are installed in the shell 27, the adjusting pad 21 is arranged below the impact stopping seat 22, the exhaust pipe 39 is connected with the air outlet end of the shell 27 through the electric control valve assembly 20, and the shell 27 and the cable clamp 37 are detachably connected and installed on the steel rail 34 through the stud bolt 36 and the first nut 35.

The pressure valve rod 5 in the embodiment adopts a ball valve structure, is automatically centered with a valve port, and has good sealing effect.

The second embodiment is as follows: referring to fig. 1 to 10, the present embodiment is described, and the electronic control valve assembly 20 of the present embodiment includes a control box, an upper permanent magnet 201, an electromagnet 202, a valve rod 203, a lower permanent magnet 204, and an integral glue valve 205; the air inlet end of the control box body is communicated with the air outlet end of the shell 27, the air outlet end of the control box body is communicated with the air inlet end of the exhaust pipe 39, the integral glue valve 205 is vertically arranged in the control box body, the upper permanent magnet 201 is fixedly arranged on the top end of the valve rod 203, the integral glue valve 205 is sleeved on the bottom end of the valve rod 203, the electromagnet 202 is sleeved on the valve rod 203, the lower permanent magnet 204 is fixedly arranged on the valve rod 203 below the electromagnet 202, and the valve rod 203 is arranged in the control box body in a sliding mode along the length direction of the valve rod 203. Other components and connection modes are the same as those of the first embodiment.

The SW bistable electric control valve is adopted in the embodiment, and the working principle is as follows:

in the working state, as shown in fig. 11A, after the electric control valve is powered by positive pulse, the valve rod 203 drives the valve rod 203, the upper permanent magnet 201 and the integral glue valve 205 to move upwards under the polar action of the electromagnet 202 and the lower permanent magnet 204. After movement, the lower permanent magnet 204 contacts the electromagnet 202, and the integral glue valve 205 separates from the valve port. When the positive pulse disappears, the magnetic force of the lower permanent magnet 204 makes it still attract the electromagnet 202, and the valve port is still in the open state. At the moment, the lower cavity of the high-load controllable retarder shell is communicated with the atmosphere through an electric control valve, so that the high-load controllable retarder sliding oil cylinder can freely slide up and down in the shell. At the moment, the high-load controllable retarder is in a working state, the working principle of the retarder is completely the same as that of the high-load retarder, and the retarder plays a role in decelerating and braking a sliding vehicle with the speed higher than the critical speed.

In a suction state, as shown in fig. 11B, when the electric control valve is energized with negative pulse, the valve rod 203 drives the valve rod 203, the lower permanent magnet 204 and the integral glue valve 205 to move downward under the polarity action of the electromagnet 202 and the upper permanent magnet 201. After moving, the upper permanent magnet 201 contacts the electromagnet 202, and the integral glue valve 205 closes the valve port. When the negative pulse current disappears, the magnetic force of the lower permanent magnet 204 makes it still attract the electromagnet 202, and the valve port is always in a closed state. At the moment, when the wheel presses down the controllable wheel-stop top sliding oil cylinder, the air at the lower part of the shell can only open the integral rubber valve 205 at the valve port of the electric control valve to be discharged to the atmosphere, and cannot be supplemented during reverse return. At the moment, the atmospheric pressure in the lower cavity of the shell is lower than the atmospheric pressure, a certain degree of vacuum degree is formed, and the sliding oil cylinder is sucked in the shell under the action of the atmospheric pressure. Therefore, the high-load controllable retarder basically does not have the function of retarding the sliding vehicle.

The third concrete implementation mode: the present embodiment is described with reference to fig. 1 to 10, and the locking valve assembly 9 of the present embodiment includes a locking valve 47 and a positioning element, the locking valve 47 is an annular sleeve, four first inclined flow holes are uniformly formed in the annular sleeve along a radial direction, each first inclined flow hole is tangent to a circle of an inner circular surface of the locking valve 47, four straight through holes are uniformly formed in an outer side wall of the piston rod 26 opposite to the locking valve 47, each first inclined flow hole in the locking valve 47 is disposed corresponding to one straight through hole in the piston rod 26, a flat key sliding groove is formed in an inner side wall of the locking valve 47, the positioning element is installed on the locking valve 47, the relief valve 13 is an annular sleeve, a plurality of flow holes are uniformly formed in an outer wall of the annular sleeve along a radial direction, a plurality of flow holes are radially formed in an annular end surface of an upper portion of the relief valve 13, the annular end surface of the relief valve 13 is clamped above the clamp spring 11 for the second shaft, the inside wall processing of alleviating valve 13 has flat keyway, alleviates valve 13 and can slide from top to bottom along the length direction of flat keyway, and lock valve 47 and alleviating valve 13 suit are on piston rod 26, and the flat keyway of alleviating valve 13 is alleviated to lock valve 47's flat keyway and below is vertical to be equipped with flat key 10, and the terminal surface processing has the inclined plane under the lock valve 47, and the inclined plane is located and alleviates directly over the valve 13 stand. The diameter of the first inclined through hole is larger than that of the straight through hole, and other components and connection modes are the same as those of the first embodiment.

The fourth concrete implementation mode is as follows: referring to fig. 1 and fig. 2, the embodiment is described, and the positioning member of the embodiment includes a positioning ball sleeve 48, a positioning steel ball 49 and a positioning spring 50; the positioning ball sleeve 48 is arranged on the locking valve 47, a steel ball mounting groove is processed on the positioning ball sleeve 48, the positioning steel ball 49 and the positioning spring 50 are arranged in the steel ball mounting groove, one end of the positioning spring 50 is in contact with the spherical surface of the positioning steel ball 49, the other end of the positioning spring 50 is in contact with the bottom surface of the steel ball mounting groove, two pits are processed on the outer side wall of the return valve plate 7 along the radial direction, and the spherical surface of the positioning steel ball 49 is arranged in any one pit. Other components and connection modes are the same as those of the first embodiment.

The fifth concrete implementation mode: referring to fig. 13, the present embodiment is described, which is a controllable chock plug, and further includes a cotter pin 44, a thrust pin 46, and two fifth 0-type seal rings 45; the impact-stopping pin 46 is inserted into the side wall of the shell 27 near the bottom of the shell 27, two fifth 0-type sealing rings 45 are sleeved on the impact-stopping pin 46, one end of the impact-stopping pin 46 in the shell 27 is arranged above the impact-stopping seat 22, and the other end of the impact-stopping pin 46 is provided with a cotter pin 44. Other components and connection modes are the same as those of the first embodiment.

The sixth specific implementation mode is as follows: the embodiment is described with reference to fig. 1 to 10, and the controllable wheel chock of the embodiment further comprises a sealing gasket 3 and a supporting ring 4; the pressure valve seat 1 is sleeved with a sealing gasket 3, the pressure valve seat 1 and the piston rod 26 are arranged in a sealing mode through the sealing gasket 3, a supporting ring 4 is sleeved on the outer side wall, close to the top, of the piston rod 26, and the supporting ring 4 is located between the piston rod 26 and the sliding oil cylinder 38. Other components and connection modes are the same as those of the first embodiment.

The seventh embodiment: the present embodiment is described with reference to fig. 1 to 10, and the present embodiment further includes a first O-ring 6, a second 0-ring 16, a third 0-ring 15, a seal ring 28, and a fourth O-ring 29; the first O-shaped sealing ring 6 is arranged on the piston rod 26 below the supporting ring 4, the piston rod 26 and the sliding oil cylinder 38 are sealed through the first O-shaped sealing ring 6, the third 0-shaped sealing ring 15 is sleeved on the outer side wall of the sealing cover 17, the sealing cover 17 and the sliding oil cylinder 38 are sealed through the third 0-shaped sealing ring 15, the second 0-shaped sealing ring 16 is embedded on the inner side wall of the shell 27, the shell 27 and the sliding oil cylinder 38 are sealed through the second 0-shaped sealing ring 16, the sealing ring 28 and the fourth O-shaped sealing ring 29 are embedded on the inner side wall of the sealing cover 17, the fourth O-shaped sealing ring 29 is sleeved on the sealing ring 28, and the sealing cover 17 and the piston rod 26 are sealed through the fourth O-shaped sealing ring 29. Other compositions and connection modes are the same as those of the fourth or fifth embodiment mode.

The specific implementation mode is eight: the embodiment is described with reference to fig. 1 to 10, and the controllable wheel chock of the embodiment further includes an upper bushing 32 and a dust ring 33, the dust ring 33 and the upper bushing 32 are installed at the opening at the top end of the housing 27 from top to bottom, and the dust ring 33 and the upper bushing 32 are used for dust sealing. Other components and connection modes are the same as those of the first embodiment.

The specific implementation method nine: the present embodiment is described with reference to fig. 1, and the present embodiment is a controllable scotch block, which further includes an elastic cylindrical pin 31, and the elastic cylindrical pin 31 is obliquely inserted into the bottom ends of the seal cover 17 and the sliding cylinder 38. Other components and connection modes are the same as those of the first embodiment.

The detailed implementation mode is ten: the embodiment is described with reference to fig. 1, and the controllable scotch block of the embodiment further comprises a wheel guard wing 40, two hexagon socket head cap screws 41, two spring washers 42 and two nuts 43; the wheel guard wing 40 is mounted on the housing 27 through a hexagon socket head cap screw 41, two spring washers 42 and two nuts 43. Other components and connection modes are the same as those of the first embodiment.

The concrete implementation mode eleven: referring to the present embodiment, which is described with reference to fig. 1, 2, 6 and 7, the flat key 10 is used to limit the position of the lock valve 47 and the relief valve 13, and the positioning steel ball 49 is pushed against one concave pit on the outer side wall of the return valve plate 7 when the lock valve 47 is at the start point of rotation, and the positioning steel ball 49 is pushed against the other concave pit on the outer side wall of the return valve plate 7 when the lock valve 47 is at the end point of rotation. Other components and connection modes are the same as those of the first embodiment.

Principle of operation

1. Deceleration braking state

When the vehicle passes through the retarder at a second critical speed lower than the retarder, the wheels press the slide cylinder 38 of the retarder, the volume of the upper chamber of the slide cylinder 38 is reduced, and the nitrogen in the upper chamber is compressed rapidly, so that the pressure rises rapidly. When the pressure rises to the preset opening pressure of the pressure valve rod 5, the pressure valve rod 5 is opened, hydraulic oil flows to the upper cavity of the slide valve rod 14 through the pressure valve rod 5 at a certain pressure, then flows into the lower cavity of the slide valve rod 14 through the edge of the secondary speed valve plate 8 and the overflowing hole of the slide valve rod 14, and is ejected to the lower cavity of the slide oil cylinder 38 through the lower part of the piston rod 26 and the overflowing hole. At the moment, the jack has the function of decelerating the vehicle and does work on the vehicle.

The arrow in fig. 4 shows the upward flow path of the hydraulic oil, when the vehicle wheel presses the top slide cylinder 38 to the lowest point, because the straight through-flow hole on the lock valve 47 is in a state of being communicated with the return valve plate 7 and the through-flow hole on the piston rod 26, the slide cylinder 38 pressed to the lowest point is under the action of the expansion force of the upper cavity compressed nitrogen, the hydraulic oil in the lower cavity flushes the check valve plate 2 along the channel, the lower cavity of the slide cylinder 38 returns to the upper cavity, the slide cylinder 38 smoothly rises to the highest position at a certain speed, and the top returns to the normal working state.

2. Locked state

The arrows in fig. 5 show the downward flow path of the hydraulic oil, when the vehicle passes through at the second critical speed higher than the roof, the wheels press the sliding cylinder 38 at a higher speed, after the pressure valve rod 5 is opened, the hydraulic oil flows into the upper cavity of the sliding valve rod 14 through the pressure valve rod 5 at a larger flow rate, and then flows into the lower cavity of the sliding valve rod 14 along the edge of the secondary speed valve plate 8 and the overflowing hole of the sliding valve rod 14, when the flow rate increases to a certain value, the pressure difference between the upper surface and the lower surface of the secondary speed valve plate 8 increases sharply, and when the pressure on the secondary speed valve plate 8 is enough to overcome the pre-pressure of the secondary speed valve spring 12, the secondary speed valve plate 8 closes, and the oil passages of the upper cavity and the lower cavity of the sliding valve rod 14 are blocked. At this time, the hydraulic oil in the upper cavity of the spool rod 14 pushes the spool rod 14 to move downward, and opens the straight through-hole in the upper portion of the piston rod 26, and the hydraulic oil is ejected from the through-hole. The injected hydraulic oil is sprayed to the outer side surface of the first inclined flow hole on the lock valve 47, the lock valve 47 rotates counterclockwise by a certain angle due to the action of the hydraulic oil sprayed on the inclined surface, as shown by the arrow in fig. 6, and the steel ball 49 on the lock valve 47 enters the concave pit at the corresponding position on the return valve plate 7 after rotation to prevent the movement, as shown in fig. 7.

When the sliding cylinder 38 returns after being pressed to the lowest position, because the locking valve 47 closes the piston rod 26 and the throttle holes on the return valve plate 7, the oil passages of the upper cavity and the lower cavity of the sliding cylinder 38 are cut off, the hydraulic oil in the lower cavity of the sliding cylinder 38 cannot normally return to the upper cavity, the sliding cylinder 38 is locked at a position below the steel rail surface, and at the moment, the top does not play a braking role on the following passing wheels.

After the high-speed vehicle passes through, the sliding oil cylinder 38 slowly rises back under the action of the micro-leakage control, when the sliding oil cylinder rises back to a position close to the highest position, the release valve assembly 13 pushes the upright post to abut against the inclined surface structure of the locking valve assembly 9 under the pushing of the sealing cover 17, and as shown in fig. 8, as the release valve 13 continues to rise, the locking valve 47 is forced to rotate clockwise by an angle, so that the locking valve 47 returns to a normal position. After rotating, the steel ball 49 on the locking valve 47 enters the concave pit at the corresponding position on the return valve plate 7 to prevent the movement, as shown in fig. 9. At this time, the return valve plate 7 and the orifice of the piston rod 26 are opened, and the top is returned to the normal operation state.

3. Wheel-stopping and anti-sliding state

When the wheels of the parked vehicle contact the top slide cylinder 38 and the slide cylinder 38 is depressed, as shown in fig. 10, the volume of the upper chamber is reduced, the nitrogen gas is forced to compress, the pressure in the upper chamber is increased, and the slide cylinder 38 generates a vertical counter force and a horizontal component force on the wheels, and the horizontal component force can stop the wheels from rolling. Because the one-way valve plate 2 adopts a structure of combining a metal framework with a non-metal sealing material, and a sealing device is arranged between the piston rod 26 and the sliding oil cylinder 38, oil passages and gaps of the upper cavity and the lower cavity of the sliding oil cylinder 38 are cut off, and the upper cavity of the sliding oil cylinder 38 can keep a high-pressure state for a long time, so that the top can keep a large horizontal braking force for a long time on a vehicle, and can play a role in stopping the wheel from slipping.

Claims (10)

1. The utility model provides a controllable scotch block, it includes casing (27), stud (36), cable checkpost (37), nut (35), slip hydro-cylinder (38) and blast pipe (39), its characterized in that: the hydraulic control valve further comprises a pressure valve seat (1), a one-way valve plate (2), a piston rod (26), a pressure valve rod (5), a return valve plate (7), a secondary speed valve plate (8), a locking valve assembly (9), a flat key (10), a secondary speed valve spring (12), a relief valve (13), a sliding valve rod (14), a sealing cover (17), a pressure valve outer spring (18), a pressure valve inner spring (19), a flat pad (30), an electric control valve assembly (20), an adjusting pad (21), a thrust stop seat (22), a cylindrical pin (23), a clamping ring (24), a filling pad (25) and two shaft snap springs (11);

the sealing cover (17) is arranged at the bottom end of the sliding oil cylinder (38), the piston rod (26) is inserted into the sealing cover (17), the pressure valve seat (1), the pressure valve rod (5), the sliding valve rod (14), the pressure valve outer spring (18), the pressure valve inner spring (19) and the flat gasket (30) are sequentially arranged at a central blind hole of the piston rod (26) from top to bottom, the bottom end of the piston rod (26) is connected with the impact stop seat (22) through a cylindrical pin (23) and a snap ring (24), the pressure valve seat (1) is in threaded connection with the top end of the piston rod (26), the open end of the bottom end of the pressure valve seat (1) is in contact with the top end of the pressure valve rod (5), the secondary speed valve plate (8) is sleeved on the pressure valve rod (5), the bottom end of the pressure valve rod (5) is arranged on the sliding valve rod (14), and the secondary speed valve spring (12) is arranged between the secondary speed valve plate (8) and the sliding valve rod (14), the top end of a secondary speed valve spring (12) is contacted with the lower end surface of a secondary speed valve plate (8), the bottom end of the secondary speed valve spring (12) is contacted with the bottom surface of a groove of a slide valve rod (14), a pressure valve outer spring (18) is sleeved outside a pressure valve inner spring (19), the top end of the pressure valve outer spring (18) and the top end of the pressure valve inner spring (19) are contacted with the bottom end of the slide valve rod (14), the bottom end of the pressure valve outer spring (18) and the bottom end of the pressure valve inner spring (19) are contacted with a flat pad (30) at the bottom end of a blind hole of a piston rod (26), a plurality of through holes are uniformly distributed and processed on the upper end surface of the piston rod (26) along the radial direction, a one-way valve plate (2) is sleeved on a pressure valve seat (1) and covers the upper part of the plurality of the through holes on the piston rod (26), a return valve plate (7), a locking valve assembly (9), a clamp spring (11) for a first shaft, a release valve (13) and a second shaft are integrally sleeved on the piston rod (26) from top to bottom, the first shaft is clamped below the locking valve assembly (9) through the clamp spring (11), the second shaft is clamped on the relief valve (13) through the clamp spring (11), the return valve plate (7) is located below the through holes in the piston rod (26), the flat key (10) is vertically embedded on the outer side wall of the piston rod (26), a flat key sliding groove and a flat key groove are formed in the inner side wall of the locking valve assembly (9) and the inner side wall of the relief valve (13) respectively, the sliding oil cylinder (38) and the adjusting pad (21) are installed in the shell (27), the adjusting pad (21) is arranged below the impact stopping seat (22), the exhaust pipe (39) is connected with the air outlet end of the shell (27) through the electric control valve assembly (20), and the shell (27) and the cable clamp (37) are detachably connected and installed on a steel rail (34) through the double-headed bolt (36) and the first nut (35).

2. The controllable chock of claim 1, wherein: the electric control valve component (20) comprises a control box body, an upper permanent magnet (201), an electromagnet (202), a valve rod (203), a lower permanent magnet (204) and an integral rubber valve (205); the inlet end of control box and the end intercommunication of giving vent to anger of casing (27), the end of giving vent to anger of control box and the inlet end intercommunication of blast pipe (39), whole gluey valve (205) is vertical to be set up in the control box, upper portion permanent magnet (201) fixed mounting is on the top of valve rod (203), whole gluey valve (205) suit is on the bottom of valve rod (203), electro-magnet (202) cover is established on valve rod (203), lower part permanent magnet (204) fixed mounting is on valve rod (203) of electro-magnet (202) below, valve rod (203) slide the setting along valve rod (203) length direction in the control box.

3. The controllable chock of claim 1, wherein: the locking valve component (9) comprises a locking valve (47) and a positioning piece, the locking valve (47) is an annular sleeve body, four first inclined through holes are uniformly and radially processed on the annular sleeve body, each first inclined through hole is tangent to the circle of the inner circular surface of the locking valve (47), four straight through holes are uniformly and uniformly processed on the outer side wall of the piston rod (26) opposite to the locking valve (47), each first inclined through hole on the locking valve (47) is correspondingly arranged with one straight through hole on the piston rod (26), a plain key sliding groove is processed on the inner side wall of the locking valve (47), the positioning piece is installed on the locking valve (47), the relief valve (13) is an annular sleeve body, a plurality of through holes are uniformly and radially processed on the outer wall of the annular sleeve body, a plurality of through holes are radially processed on the annular end surface of the upper part of the relief valve (13), the annular end surface of the relief valve (13) is clamped above a second shaft snap spring (11), the inside wall processing of alleviating valve (13) has flat keyway, alleviate valve (13) and can follow the length direction of flat keyway and slide from top to bottom, lock valve (47) with alleviate valve (13) suit on piston rod (26), the flat key sliding tray of lock valve (47) and the flat keyway of valve (13) are alleviated to the below vertical flat key (10) that is equipped with, the terminal surface processing has the inclined plane under lock valve (47), and the inclined plane is located and alleviates valve (13) stand directly over.

4. A controllable chock as claimed in claim 3, in which: the positioning piece comprises a positioning ball sleeve (48), a positioning steel ball (49) and a positioning spring (50); the positioning ball sleeve (48) is arranged on the locking valve (47), a steel ball mounting groove is processed on the positioning ball sleeve (48), a positioning steel ball (49) and a positioning spring (50) are arranged in the steel ball mounting groove, one end of the positioning spring (50) is in contact with the spherical surface of the positioning steel ball (49), the other end of the positioning spring (50) is in contact with the bottom surface of the steel ball mounting groove, two pits are radially processed on the outer side wall of the return valve plate (7), and the spherical surface of the positioning steel ball (49) is arranged in any pit.

5. The controllable chock of claim 1, wherein: the device also comprises a cotter pin (44), a thrust pin (46) and two fifth 0-type sealing rings (45); the anti-impact pin (46) is inserted into the side wall of the shell (27) close to the bottom of the shell (27), two fifth 0-shaped sealing rings (45) are sleeved on the anti-impact pin (46), one end of the anti-impact pin (46) in the shell (27) is arranged above the anti-impact seat (22), and the other end of the anti-impact pin (46) is provided with a split pin (44).

6. The controllable chock of claim 1, wherein: it also comprises a sealing gasket (3) and a supporting ring (4); the pressure valve seat (1) is sleeved with a sealing gasket (3), the pressure valve seat (1) and the piston rod (26) are arranged in a sealing mode through the sealing gasket (3), a supporting ring (4) is sleeved on the outer side wall, close to the top, of the piston rod (26), and the supporting ring (4) is located between the piston rod (26) and the sliding oil cylinder (38).

7. The controllable chock of claim 5, wherein: the sealing device also comprises a first O-shaped sealing ring (6), a second 0-shaped sealing ring (16), a third 0-shaped sealing ring (15), a sealing ring (28) and a fourth O-shaped sealing ring (29); the first O-shaped sealing ring (6) is arranged on the piston rod (26) below the supporting ring (4), the piston rod (26) and the sliding oil cylinder (38) are sealed through the first O-shaped sealing ring (6), the third 0-shaped sealing ring (15) is sleeved on the outer side wall of the sealing cover (17), the sealing cover (17) and the sliding oil cylinder (38) are sealed through the third 0-shaped sealing ring (15), the second 0-shaped sealing ring (16) is embedded on the inner side wall of the shell (27), the shell (27) and the sliding oil cylinder (38) are sealed through the second 0-shaped sealing ring (16), the sealing ring (28) and the fourth O-shaped sealing ring (29) are embedded on the inner side wall of the sealing cover (17), the fourth O-shaped sealing ring (29) is sleeved on the sealing ring (28), and the sealing cover (17) and the piston rod (26) are sealed through the fourth O-shaped sealing ring (29).

8. The controllable chock of claim 1, wherein: the dustproof sealing device further comprises an upper bushing (32) and a dustproof ring (33), wherein the dustproof ring (33) and the upper bushing (32) are arranged at an opening at the top end of the shell (27) from top to bottom, and the dustproof sealing is carried out through the upper bushing (32) and the dustproof ring (33).

9. The controllable chock of claim 1, wherein: the device also comprises an elastic cylindrical pin (31), wherein the elastic cylindrical pin (31) is obliquely inserted and arranged on the bottom ends of the sealing cover (17) and the sliding oil cylinder (38).

10. The controllable chock of claim 1, wherein: the wheel protection device also comprises a wheel protection wing (40), two inner hexagonal socket head cap screws (41), two elastic cushions (42) and two nuts II (43); the wheel-protecting wing (40) is installed on the shell (27) through a hexagon socket head cap screw (41), two elastic cushions (42) and two nuts (43).

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