CN218874353U - Hydraulic puller for steel rail plug nail - Google Patents

Abstract

The utility model relates to a fluid pressure type pull-out ware for rail plug nail, it includes power part and oil delivery hose, power part is hydraulic control device, and its characteristics are: the oil delivery hole of the power part is communicated with the overflowing hole of the pull-up part through the oil delivery hose. The using method comprises the following steps: the knob is rotated to close the stop valve of the oil return channel, the pulling head is clamped with the plug nail cap of the steel rail plug nail, the handle is repeatedly swung, the plunger of the oil pump is pulled by the handle to reciprocate so as to inject hydraulic oil into the closed containing cavity of the hydraulic cylinder sleeve of the pulling part, the hydraulic oil drives the piston to move upwards to drive the steel rail plug nail to move upwards until the steel rail plug nail is pulled out, then the stop valve of the oil return channel is opened, the hydraulic oil in the closed containing cavity of the hydraulic cylinder sleeve flows back into the oil tank of the power part, and the pulling head is reset by the spring.

Description

Hydraulic puller for steel rail plug nail

Technical Field

The utility model relates to a railway maintenance tool, the rail plug pin of concretely relates to railway station inside and between section track circuit equipment plays to pull out is a fluid pressure type puller that is used for rail plug pin.

Background

The rail plug nail is connected with the plug nail hole through steel and steel conical surface knocking contact, the contact is very tight, the rail station is limited by an operation space, tools need to be replaced for matching use, and the rail station cannot be operated when meeting special narrow space. The existing pulling tools are divided into 4 types;

1. when the operation space is large, the hammer and the punch are used for beating forcefully by manpower. There are problems: the hammer type is 4 pounds, the weight is 1.5 kilograms, the punch length is 20 centimeters, the diameter is 20 millimeters, and the weight of the quenched hexagonal steel is 0.5 kilogram. When the flat-headed hammer is used for knocking, the large surface of the flat-headed hammer is in contact with the small surface of the punch, the requirement on the operability of operators is extremely high, and the hand slightly deviating to hold the punch can be injured by crashing, so that personal injury is easily caused. The punch is made of quenched steel, and the field operation often generates over-violent force, generates fracture, and splashes steel blocks to hurt people. The small operation space is even impossible to use.

2. When the operation space is small, a crowbar is used for pulling out the steel pipe by utilizing the lever principle. There are problems: the crowbar has the advantages that the total length is 1.5-0.8 meter, the weight is 5-11 kilograms, the nail pulling part needs to be specially customized and is not durable, the crowbar has larger weight and is not easy to carry, and the crowbar is rarely used in operation. When the plug nail is pulled out, the plug nail needs to be perpendicular to the ground, the plug nail drops off instantly, and operators are easy to slip and fall down. When the plug nail is contacted too deeply, the space of the nail pulling part is insufficient and the plug nail can not be used.

3. Mechanical type screw rod plug pin extractor. There are problems: the length is 33 centimeters, the weight is 3 kilograms, the internal screw rod part has dense and small threads, is not durable and is easy to damage, a 300MM wrench needs to be taken to rotate during operation, the operation speed is low, the labor is wasted, the number of carrying tools is increased, the length is long, the weight is heavy, the carrying is difficult, and the field operation is basically not used.

4. A hydraulic plug pin extractor. There are two types: the device is respectively a right angle and a full-length integrated type, wherein (1) the right angle is L-shaped, the length of an operable surface is 21 cm, and the weight is 4.5 kg. And (2) the integrated body has a length of 55 cm and a weight of 4.5 kg. The two types of pulling-out devices have the same principle, and are pressurized by a manual oil pump, so that the oil cylinder acts to jack the plug nail through the pulling-out part. There are problems: the weight is heavier, the size is large, the universal use cannot be realized due to the limitation of the operation space during operation, and the pulling weight is 8 tons.

Summary the above tools present common problems: (1) The size is too long or too large, and the universal capability cannot be achieved due to the limitation of the operation space. (2) the mechanical strength is insufficient and the steel is easy to damage. And (3) the weight is heavy, the volume is large, and the carrying is difficult. (4) The operability is strong, the operation requirement is high, and the requirement of simplicity, convenience and quickness cannot be met. And (5) the safety coefficient is low, and personal injury is caused.

Patent number 2020210423785, the utility model patent of a fluid pressure type rail plug nail pull-out ware of name have solved not enough, have small and exquisite nimble light in weight, can disassemble folding portable, adapt to various space commonality strong, labour saving and time saving is efficient, the convenient longe-lived advantage of maintenance. However, there are also the following problems: 1 the original pulling head adopts an exposed type and exceeds the diameter of a cylinder body by 4 cm, when the transverse distance between two plug nails is less than 8 cm, the pulling equipment cannot be installed for operation, and a large part of operation cannot be finished according to the requirement that the distance between the two plug nails is not more than 8 cm specified by railway maintenance management. 2 the joint of the original oil cylinder and the pulling head adopts welding and hot riveting processes, the temperature control requirement of the processing technology is too high, the welding part cannot reach ideal hardness, and the sealing part in the cylinder is damaged after being heated, so that the faults frequently occur in field use. 3 the original oil cylinder and the piston are designed to have the pulling weight of 10 tons, the cross section of the piston and the volume of the cylinder body are large and exceed the pulling force of the rated plug nail by more than 3 times, and the waste phenomenon exists on the material and labor cost.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: the defects of the prior art are overcome, and the hydraulic puller for the steel rail plug pin is provided.

The utility model provides a technical problem's scheme is: the utility model provides a fluid pressure type pull-out ware for rail plug pin, it includes power part and oil delivery hose, power part is hydraulic control device, characterized by: the oil delivery hole of the power part is communicated with the overflowing hole of the pull-up part through the oil delivery hose.

The pulling part comprises a hydraulic cylinder sleeve, a gland, a piston, a pulling head, a guide pin, a spring, a large sealing ring and a small sealing ring, the opening part of an upper cavity of the hydraulic cylinder sleeve is fixedly connected with the gland, the piston is arranged in the hydraulic cylinder sleeve in a penetrating way, a piston body of the piston is arranged in the upper cavity of the hydraulic cylinder sleeve, an upper piston rod of the piston extends out of the gland, a lower piston rod of the piston extends into a lower cavity of the hydraulic cylinder sleeve, the pulling head is arranged in the lower cavity of the hydraulic cylinder sleeve, the upper end of the pulling head is fixedly connected with the lower piston rod of the piston, a large opening groove or a small opening groove of the pulling head is coaxial with an opening groove of the lower cavity of the hydraulic cylinder sleeve, and the opening direction is consistent, the one end of uide pin links firmly with the lower appearance chamber lateral wall of hydraulic cylinder liner, the other end stretches into the guide way and sliding connection of pulling-up head, the spring is arranged in hydraulic cylinder liner on hold the intracavity, cup joints on the last piston rod of piston, the upper end and the gland contact of spring, the lower extreme and the piston body contact of piston, big sealing washer is arranged in hydraulic cylinder liner on hold the intracavity, cup joints on the piston body of piston, big sealing washer links firmly with the piston body, with the last appearance chamber sealing contact of hydraulic cylinder liner, little sealing washer is arranged in the axial through-hole of hydraulic cylinder liner, the below of discharge orifice, little sealing washer cup joints on the lower piston rod of piston, little sealing washer links firmly with the axial through-hole of hydraulic cylinder liner, with the lower piston rod sealing contact of piston.

The hydraulic cylinder sleeve of the pulling component is a cylindrical body, an upward opening accommodating cavity is formed in the upper end of a hydraulic cylinder sleeve of the cylindrical body, a gland is arranged in an opening of the upward accommodating cavity and fixedly connected with the opening, a downward opening accommodating cavity is formed in the lower end of the hydraulic cylinder sleeve, an axial open slot is formed in the side face of the downward accommodating cavity, a radial pin hole is formed in the side wall of the downward accommodating cavity, a guide pin is arranged in the pin hole and fixedly connected with the guide pin, an axial through hole is formed in the middle of the hydraulic cylinder sleeve, the upper accommodating cavity and the lower accommodating cavity are connected, a radial overflowing hole is formed in the side face of the axial through hole and communicated with the axial through hole, and the overflowing hole is used for connecting a power component.

The piston of pulling out the part includes the piston body, set up the diameter of axle in the middle of the piston body, set up the last piston rod of reducing, the lower piston rod of reducing in the upper end of piston body, the last appearance intracavity that the hydraulic cylinder cover was arranged in to the piston, the piston body peripheral surface of piston and the last appearance intracavity wall sliding connection of hydraulic cylinder cover, the last piston rod of piston upwards stretches out outside the gland, lower piston rod passes axial through hole downwards and stretches into down and holds the intracavity, big sealing washer cup joints on the diameter of axle in the middle of the piston body and links firmly, little sealing washer is arranged in between the axial through hole of hydraulic cylinder cover and the lower piston rod of piston, the below of discharge orifice, and little sealing washer links firmly with the axial through hole of hydraulic cylinder cover, with the lower piston rod sealing contact of piston, the last appearance chamber of big sealing washer, little sealing washer and hydraulic cylinder cover forms inclosed cavity for hold hydraulic oil.

The pull-up head is a cylindrical body, one end of the pull-up head of the cylindrical body is provided with a small opening groove with a radial opening, the middle of the pull-up head is provided with a large opening groove with a radial opening, the large opening groove is coaxial with the small opening groove, the peripheral surface of the pull-up head is provided with an axial guide groove, and the guide pin is in sliding fit with the guide groove.

The oil hose is provided with a quick connecting part and a universal quick-change connector, and the structure is as follows: the oil delivery hose comprises a front oil delivery pipe and a rear oil delivery pipe, wherein the first end of the front oil delivery pipe is in sealing connection with an overflowing hole of the hydraulic cylinder sleeve, the second end of the front oil delivery pipe is in sealing connection with the universal quick-change connector and is in sealing connection with the plug through the universal quick-change connector, the first end of the rear oil delivery pipe is in sealing connection with the adapter, the second end of the rear oil delivery pipe is in sealing connection with an oil delivery hole of the power part, and the plug is in socket-and-spigot connection with the adapter and is locked through the split ring.

The plug is a cylinder, an annular groove for locking is arranged at the connecting end of the plug, a sealing annular groove is arranged at the plug end, an oil passing hole is arranged in the middle of the plug, and a sealing ring is arranged in the sealing annular groove and fixedly connected.

The connector is a columnar body, the connecting end of the connector is provided with external threads to be connected with a rear oil conveying pipe, the connecting end of the connector is provided with a connecting hole for accommodating the plug end of the plug connector, four radial through holes are uniformly distributed on the side wall of the connecting end, the split ring penetrates through the four radial through holes of the connector and the annular groove of the connecting end of the plug connector simultaneously, the connector and the plug connector are locked and fixedly connected together, the middle of the connector is provided with an oil flow hole, and the oil flow hole of the connector and the oil passing hole of the plug connector are communicated to form an oil path.

The power part includes oil tank, blanking cover, the fixed body, oil pump, first check valve, second check valve, stop valve, handle and knob, the oil tank is arranged in the casing, outside the oil filler point of oil tank stretched out the casing, the oil filler point by the blanking cover shutoff, the side of oil tank is arranged in to the fixed body, in the fixed body was arranged in to the oil pump, the plunger of oil pump passed the fixed body and stretched out outside the casing, the oil inlet of oil pump passed through the oil feed passageway and the oil tank intercommunication of the fixed body, the oil-out of oil pump and the oil channel intercommunication of the fixed body, first check valve was arranged in the oil feed passageway of the fixed body, the second check valve was arranged in the oil channel of the fixed body, the stop valve was arranged in the oil return passageway of the fixed body, and the control rod passed the fixed body and stretched out outside the casing, the handle was arranged in outside the casing, the plunger top of oil pump, the front end of handle was articulated with the casing, the rear end was for operating handle, the centre was articulated with the plunger, the knob was arranged outside the casing, the control rod department of stop valve and linked firmly.

The oil pump fixing device is characterized in that the fixing body is a cylinder, one side, close to the oil tank, of the fixing body is provided with an accommodating cavity for accommodating an oil pump, a main channel is arranged at the center of the side face of the accommodating cavity and the center of the fixing body, an oil inlet channel and an oil outlet channel are respectively arranged at the bottom of the accommodating cavity, the oil inlet channel is communicated with the oil tank, the oil outlet channel is communicated with the main channel, an oil return channel is arranged at the side face of the accommodating cavity, and one end of the oil return channel is communicated with the oil tank while the other end of the oil return channel is communicated with the main channel.

The oil pump is a plunger pump.

The utility model discloses a use method is: the knob is rotated to close the stop valve of the oil return channel, the pulling head is clamped with the plug nail cap of the steel rail plug nail, the handle is repeatedly swung, the plunger of the oil pump is pulled by the handle to reciprocate so as to inject hydraulic oil into the closed containing cavity of the hydraulic cylinder sleeve of the pulling part, the hydraulic oil drives the piston to move upwards to drive the steel rail plug nail to move upwards until the steel rail plug nail is pulled out, then the stop valve of the oil return channel is opened, the hydraulic oil in the closed containing cavity of the hydraulic cylinder sleeve flows back into the oil tank of the power part, and the pulling head is reset by the spring.

The utility model has the advantages that:

1 the utility model discloses a pull-out ware has carried out preferential improvement to current pull-out ware shortcoming, and power unit uses hydraulic control device, and power unit and pull-out adopt the oil hose to carry out the flexible coupling between the part, can fold or the components of a whole that can function independently carries. The weight is reduced, compared with the pulling device in the prior art, the volume is reduced to 17 cm on the whole, the weight is reduced to 3.7 kg, the pulling height is 20 mm, and the pulling weight is 5 tons;

2 the puller of the utility model can be suitable for pulling steel rail plug nails in special and narrow operation space, and the steel rail plug nails in special and narrow operation space are found in the test, thus completely meeting the operation requirement;

3 the utility model discloses a puller is small and exquisite, nimble, and easy operation does not receive the operating space restriction, can 360 degrees rotations, buckle the use, and large-scale station crossover point, movable switch of speeding, the pulling plug nail work in marshalling yard switch district position, special narrow and small space all can not be restricted, has realized general function completely, and the disposable does not need the maintenance throughout, and it is convenient to maintain.

The folding portable folding chair has the advantages of being small, flexible, light in weight, capable of being disassembled, folded, convenient to carry, adaptable to various space, strong in universality, time-saving, labor-saving, high in efficiency, convenient to maintain and long in service life.

Drawings

Fig. 1 is a schematic structural view of a hydraulic extractor for a rail plug nail according to the present invention;

fig. 2 is a front cross-sectional view of a pulling member of a hydraulic pulling device for a rail plug nail according to the present invention;

FIG. 3 is a schematic right sectional view of FIG. 2;

fig. 4 is a schematic front view of a hydraulic cylinder sleeve of a hydraulic puller pulling part for a steel rail plug nail according to the present invention;

FIG. 5 isbase:Sub>A schematic sectional view A-A of FIG. 4;

FIG. 6 is a schematic right-side view of FIG. 5;

fig. 7 is a schematic diagram of a piston structure of a hydraulic puller pulling component for a steel rail plug nail according to the present invention;

fig. 8 is a front view of a pulling head of a hydraulic pulling device pulling member for a rail plug nail according to the present invention;

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a schematic cross-sectional view B-B of FIG. 8;

FIG. 11 is a schematic cross-sectional view C-C of FIG. 8;

fig. 12 is a schematic structural view of a plug of a hydraulic extractor for a rail plug nail according to the present invention;

fig. 13 is a front view and a half cross-sectional view of a receiving head of a hydraulic extractor for a rail plug nail according to the present invention;

FIG. 14 is a top cross-sectional view of FIG. 13;

fig. 15 is a front view of a split ring of a hydraulic extractor for a rail plug nail according to the present invention;

FIG. 16 is a top view of FIG. 15;

fig. 17 is a schematic structural view of a power unit of a hydraulic extractor for a rail plug nail according to the present invention;

FIG. 18 is a schematic cross-sectional view D-D of FIG. 17;

FIG. 19 is a schematic cross-sectional view E-E of FIG. 17;

FIG. 20 is a schematic cross-sectional view F-F of FIG. 17;

fig. 21 is a schematic view of a hydraulic system of a hydraulic extractor for a rail plug pin according to the present invention.

In the figure: 1 blocking cover, 2 power parts, 3 handles, 4 plungers, 5 lugs, 6 end covers, 7 rear oil pipelines, 8 bearing heads, 9 split rings, 10 plug connectors, 11 universal quick-change connectors, 12 front oil pipelines, 13 pulling parts, 14 pressing covers, 15 springs, 16 pistons, 17 large sealing rings, 18 hydraulic cylinder sleeves, 19 overflowing holes, 20 small sealing rings, 21 pulling heads, 22 guide pins, 23 lower containing cavities, 24 axial through holes, 25 open grooves, 26 upper containing cavities, 27 pin holes, 28 upper piston rods, 29 piston bodies, 30 axial diameters, 31 lower piston rods, 32 small open grooves, 33 large open grooves, 34 guide grooves, 35 connecting ends, 36 plug ends, 37 annular grooves, 38 sealing annular grooves, 39 bearing ends, 40 bearing holes, 41 connecting ends, 42 radial through holes, 43 shells, 44 oil tanks, 45 fixing bodies, 46 main channels, 47 oil outlet channels, 48 second one-way valves, 49 oil inlet channels, 50 first one-way valves, 51, 52, 53 oil pump channels, 54 stop valves and 55 control levers.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Referring to fig. 1-16, in embodiment 1, a hydraulic extractor for a rail nail comprises a power component 2 and an oil delivery hose, wherein the power component 2 is a hydraulic control device, the power component 2 is arranged in a shell 43 and fixedly connected, a layer of soft rubber is coated on the outer peripheral surface of one end, close to a blocking cover 1, of the shell 43, an end cover 6 is fixedly connected with the shell 43, the extractor further comprises an extractor component 13, the power component 2 is connected with the extractor component 13 through the oil delivery hose, and an oil delivery hole of the power component 2 is communicated with an overflowing hole 19 of the extractor component 13 through the oil delivery hose.

The pulling part 13 comprises a hydraulic cylinder sleeve 18, a gland 14, a piston 16, a pulling head 21, a guide pin 22, a spring 15, a large sealing ring 17 and a small sealing ring 20, an opening part of an upper cavity 26 of the hydraulic cylinder sleeve 18 is fixedly connected with the gland 14, the piston 16 is arranged in the hydraulic cylinder sleeve 18 in a penetrating manner, a piston body 29 of the piston 16 is arranged in the upper cavity 26 of the hydraulic cylinder sleeve 18, an upper piston rod 28 of the piston 16 extends out of the gland 14, a lower piston rod 31 of the piston 16 extends into the lower cavity 23 of the hydraulic cylinder sleeve 18, the pulling head 21 is arranged in the lower cavity 23 of the hydraulic cylinder sleeve 18, the upper end of the pulling head is fixedly connected with the lower piston rod 31 of the piston 16, a large opening groove 33 or a small opening groove 32 of the pulling head 21 is coaxial with and has the same opening direction as that of the opening groove 25 of the lower cavity 23 of the hydraulic cylinder sleeve 18, one end of the guide pin 22 is fixedly connected with the side wall of the lower containing cavity 23 of the hydraulic cylinder sleeve 18, the other end of the guide pin extends into the guide groove 34 of the pulling head 21 and is in sliding connection, the spring 15 is arranged in the upper containing cavity 26 of the hydraulic cylinder sleeve 18 and is sleeved on the upper piston rod 28 of the piston 16, the upper end of the spring 15 is in contact with the gland 14, the lower end of the spring 15 is in contact with the piston body 29 of the piston 16, the large sealing ring 17 is arranged in the upper containing cavity 26 of the hydraulic cylinder sleeve 18 and is sleeved on the piston body 29 of the piston 16, the large sealing ring 17 is fixedly connected with the piston body 29 and is in sealing contact with the upper containing cavity 26 of the hydraulic cylinder sleeve 18, the small sealing ring 20 is arranged in the axial through hole 24 of the hydraulic cylinder sleeve 18 and below the overflowing hole 19, the small sealing ring 20 is sleeved on the lower piston rod 31 of the piston 16, and the small sealing ring 20 is fixedly connected with the axial through hole 24 of the hydraulic cylinder sleeve 18 and is in sealing contact with the lower piston rod 31 of the piston 16.

The hydraulic cylinder sleeve 18 of the pulling component 13 is a cylindrical body, the upper end of the hydraulic cylinder sleeve 18 of the cylindrical body is provided with an upward opening accommodating cavity 26, the gland 14 is arranged at the opening of the upward accommodating cavity 26 and is fixedly connected, the lower end of the hydraulic cylinder sleeve 18 is provided with a downward opening accommodating cavity 23, the side surface of the downward accommodating cavity 23 is provided with an axial open slot 25, the side wall of the downward accommodating cavity 23 is provided with a radial pin hole 27, the guide pin 22 is arranged in the pin hole 27 and is fixedly connected, the middle of the hydraulic cylinder sleeve 18 is provided with an axial through hole 24, the upward accommodating cavity 26 and the downward accommodating cavity 23 are connected, the side surface of the axial through hole 24 is provided with a radial overflowing hole 19 and is communicated with the axial through hole 24, and the overflowing hole 19 is used for connecting the power component 2.

The piston 16 of the pulling part 13 comprises a piston body 29, a shaft diameter 30 is arranged in the middle of the piston body 29, a diameter-reduced upper piston rod 28 is arranged at the upper end of the piston body 29, a diameter-reduced lower piston rod 31 is arranged at the lower end of the piston body 29, the piston 16 is arranged in an upper cavity 26 of the hydraulic cylinder sleeve 18, the peripheral surface of the piston body 29 of the piston 16 is in sliding connection with the inner wall of the upper cavity 26 of the hydraulic cylinder sleeve 18, the upper piston rod 28 of the piston 16 upwards extends out of the gland 14, the lower piston rod 31 downwards penetrates through the axial through hole 24 and extends into the lower cavity 23, the large sealing ring 17 is sleeved on the shaft diameter 30 in the middle of the piston body 29 and fixedly connected with the same, the small sealing ring 20 is arranged between the axial through hole 24 of the hydraulic cylinder sleeve 18 and the lower piston rod 31 of the piston 16 and below the overflowing hole 19, the small sealing ring 20 is fixedly connected with the axial through hole 24 of the hydraulic cylinder sleeve 18 and is in sealing contact with the lower piston rod 31 of the piston 16, and the large sealing ring 17, the small sealing ring 20 and the upper cavity 26 of the hydraulic cylinder sleeve 18 form a closed cavity for containing hydraulic oil.

The drawing head 21 is a cylindrical body, one end of the drawing head 21 of the cylindrical body is provided with a small opening groove 32 with a radial opening, the middle of the drawing head 21 is provided with a large opening groove 33 with a radial opening, the large opening groove 33 is coaxial with the small opening groove 32, the opening direction is consistent, the peripheral surface of the drawing head 21 is provided with an axial guide groove 34, and the guide pin 22 is in sliding fit with the guide groove 34.

The oil hose is provided with a quick connecting part and a universal quick-change connector 11, and the structure is as follows: the oil delivery hose comprises a front oil delivery pipe 12 and a rear oil delivery pipe 7, wherein the first end of the front oil delivery pipe 12 is in sealing connection with a flowing hole 19 of a hydraulic cylinder sleeve 18, the second end of the front oil delivery pipe is in sealing connection with a universal quick-change connector 11, and the front oil delivery pipe is in sealing connection with an oil delivery hole of a power part 2 through the universal quick-change connector 11, the first end of the rear oil delivery pipe 7 is in sealing connection with a bearing head 8, the second end of the rear oil delivery pipe is in sealing connection with the oil delivery hole of the power part 2, and the bearing head 10 is in socket-and-spigot connection with the bearing head 8 and is locked through a split ring 9.

The plug 10 is a cylinder, an annular groove 37 for locking is arranged at the connecting end 35 of the plug 10, a sealing annular groove 38 is arranged at the plug end 36, an oil passing hole is arranged in the middle of the plug 10, and a sealing ring is arranged in the sealing annular groove 38 and fixedly connected.

The bearing head 8 is a columnar body, the connecting end 41 of the bearing head 8 is provided with an external thread to be connected with the rear oil delivery pipe 7, the bearing end 39 of the bearing head 8 is provided with a bearing hole 40 for accommodating the plug end 36 of the plug head 10, four radial through holes 42 are uniformly distributed on the side wall of the bearing end 39, the split ring 9 is simultaneously penetrated in the four radial through holes 42 of the bearing head 8 and the annular groove 37 of the connecting end 35 of the plug head 10, so that the bearing head 8 and the plug head 10 are locked and fixedly connected together, the middle of the bearing head 8 is provided with an oil flow hole, and the oil flow hole of the bearing head 8 is communicated with the oil flow hole of the plug head 10 to form an oil path.

The power component 2 comprises an oil tank 44, a blocking cover 1, a fixing body 45, an oil pump 51, a first check valve 50, a second check valve 48, a stop valve 52, a handle 3 and a knob 55, wherein the oil tank 44 is arranged in the shell 43, a valve is arranged at the inlet of the oil tank, an oil filling hole of the oil tank 44 extends out of the shell 43, the oil filling hole is blocked by the blocking cover 1, the fixing body 45 is arranged on the side surface of the oil tank 44, the oil pump 51 is arranged in the fixing body 45, a plunger 4 of the oil pump 51 penetrates through the fixing body 45 and extends out of the shell 43, an oil inlet of the oil pump 51 is communicated with the oil tank 44 through an oil inlet channel 49 of the fixing body 45, an oil outlet of the oil pump 51 is communicated with an oil outlet channel 47 of the fixing body 45, the first check valve 50 is arranged in the oil inlet channel 49 of the fixing body 45, the second check valve 48 is arranged in the oil outlet channel 47 of the fixing body 45, the stop valve 52 is arranged in the oil return channel 53 of the fixing body 45, an operating lever 54 penetrates through the fixing body 45 and extends out of the shell 43, the handle 3 is arranged above the plunger 4 of the shell 43 and the handle 3, and the front end of the handle 3 is hinged with the middle handle 43 and the handle 55, and the handle is hinged to the middle handle 52.

The fixing body 45 is a cylinder, one side of the fixing body 45, which is close to the oil tank 44, is provided with a cavity for accommodating the oil pump 51, the side surface of the cavity and the center of the fixing body 45 are provided with a main channel 46, the bottom of the cavity is respectively provided with an oil inlet channel 49 and an oil outlet channel 47, the oil inlet channel 49 is communicated with the oil tank 44, the oil outlet channel 47 is communicated with the main channel 46, the side surface of the cavity is provided with an oil return channel 53, and one end of the oil return channel 53 is communicated with the oil tank 44 and the other end of the oil return channel is communicated with the main channel 46.

The oil pump 51 is a plunger pump.

The present embodiment is manufactured by using the prior art, and the oil hose, the oil pump 51, the first check valve 50, the second check valve 48, the stop valve 52, the valve and the universal quick-change connector 11 are all commercially available products in the prior art.

The working process of the embodiment is as follows: the knob 55 is rotated to close the stop valve 52 of the oil return passage 53, the pulling head 21 is clamped with the plug nail cap of the steel rail plug nail, the handle 3 is repeatedly swung, the plunger 4 of the oil pump 51 is pulled by the handle 3 to reciprocate, so that hydraulic oil is injected into the sealed cavity of the hydraulic cylinder sleeve 18 of the pulling part 13, the piston 16 is driven by the hydraulic oil to move upwards to drive the steel rail plug nail to move upwards until the steel rail plug nail is pulled out, then the stop valve 52 of the oil return passage 53 is opened, the hydraulic oil in the sealed cavity of the hydraulic cylinder sleeve 18 flows back into the oil tank 44 of the power part 2, and the spring 15 resets the pulling head 21.

The embodiment is not limited to the present specific embodiment, and it will be apparent to those skilled in the art that simple duplication and modification without inventive work are within the scope of the present embodiment as claimed in the claims.

Claims (7)

1. The utility model provides a fluid pressure type pull-out ware for rail plug nail, it includes power part and oil delivery hose, power part is hydraulic control device, characterized by: the power part is connected with the pulling part through the oil delivery hose, and an oil delivery hole of the power part is communicated with an overflowing hole of the pulling part through the oil delivery hose;

the pulling part comprises a hydraulic cylinder sleeve, a gland, a piston, a pulling head, a guide pin, a spring, a large sealing ring and a small sealing ring, the opening part of the upper containing cavity of the hydraulic cylinder sleeve is fixedly connected with the gland, the piston is arranged in the hydraulic cylinder sleeve in a penetrating manner, the piston body of the piston is arranged in the upper containing cavity of the hydraulic cylinder sleeve, the upper piston rod of the piston extends out of the gland, the lower piston rod of the piston extends into the lower containing cavity of the hydraulic cylinder sleeve, the pulling head is arranged in the lower containing cavity of the hydraulic cylinder sleeve, the upper end of the pulling head is fixedly connected with the lower piston rod of the piston, the large opening groove or the small opening groove is coaxial with the opening groove of the lower containing cavity of the hydraulic cylinder sleeve, the opening direction of the large opening groove or the small opening groove of the pulling head is consistent with the opening direction of the opening of the lower containing cavity of the hydraulic cylinder sleeve, one end of the guide pin is fixedly connected with the side wall of the lower containing cavity of the hydraulic cylinder sleeve, the other end of the guide groove of the pulling head is slidably connected with the upper containing cavity of the hydraulic cylinder sleeve, the spring is arranged in the upper containing cavity of the hydraulic cylinder sleeve, the upper piston rod of the spring is contacted with the gland, the lower end of the spring is contacted with the piston body of the small sealing ring, the piston is axially connected with the piston, the piston rod of the small sealing ring, and the piston sleeve, and the piston is axially connected with the piston through hole of the small sealing ring.

2. A hydraulic puller for a rail plug according to claim 1, including: the hydraulic cylinder sleeve of the pulling component is a cylindrical body, an upward opening accommodating cavity is formed in the upper end of a hydraulic cylinder sleeve of the cylindrical body, a gland is arranged in an opening of the upward accommodating cavity and fixedly connected with the opening, a downward opening accommodating cavity is formed in the lower end of the hydraulic cylinder sleeve, an axial open slot is formed in the side face of the downward accommodating cavity, a radial pin hole is formed in the side wall of the downward accommodating cavity, a guide pin is arranged in the pin hole and fixedly connected with the guide pin, an axial through hole is formed in the middle of the hydraulic cylinder sleeve, the upper accommodating cavity and the lower accommodating cavity are connected, a radial overflowing hole is formed in the side face of the axial through hole and communicated with the axial through hole, and the overflowing hole is used for connecting a power component.

3. A hydraulic puller for a rail plug according to claim 1, including: the piston of pulling out the part includes the piston body, set up the diameter of axle in the middle of the piston body, set up the last piston rod of reducing, the lower piston rod of reducing in the upper end of piston body, the last appearance intracavity that the hydraulic cylinder cover was arranged in to the piston, the piston body peripheral surface of piston and the last appearance intracavity wall sliding connection of hydraulic cylinder cover, the last piston rod of piston upwards stretches out outside the gland, lower piston rod passes axial through hole downwards and stretches into down and holds the intracavity, big sealing washer cup joints on the diameter of axle in the middle of the piston body and links firmly, little sealing washer is arranged in between the axial through hole of hydraulic cylinder cover and the lower piston rod of piston, the below of discharge orifice, and little sealing washer links firmly with the axial through hole of hydraulic cylinder cover, with the lower piston rod sealing contact of piston, the last appearance chamber of big sealing washer, little sealing washer and hydraulic cylinder cover forms inclosed cavity for hold hydraulic oil.

4. A hydraulic extractor for a rail plug according to claim 1, characterized in that: the pulling head is a columnar body, one end of the pulling head of the columnar body is provided with a small opening groove with a radial opening, the middle of the pulling head is provided with a large opening groove with a radial opening, the large opening groove is coaxial with the small opening groove, the peripheral surface of the pulling head is provided with an axial guide groove, and the guide pin is in sliding fit with the guide groove.

5. A hydraulic puller for a rail plug according to claim 1, including: the oil hose is provided with a quick connecting part and a universal quick-change connector, and the structure is as follows: the oil delivery hose comprises a front oil delivery pipe and a rear oil delivery pipe, wherein the first end of the front oil delivery pipe is in seal connection with the overflowing hole of the hydraulic cylinder sleeve, the second end of the front oil delivery pipe is in seal connection with the universal quick-change connector, and the first end of the rear oil delivery pipe is in seal connection with the adapting head, the second end of the rear oil delivery pipe is in seal connection with the oil delivery hole of the power part, and the adapting head is in socket joint connection with the adapting head and is locked through a split ring.

6. A hydraulic extractor for a rail plug according to claim 5, characterized in that: the plug is a cylinder, an annular groove for locking is arranged at the connecting end of the plug, a sealing annular groove is arranged at the plug end, an oil passing hole is arranged in the middle of the plug, and a sealing ring is arranged in the sealing annular groove and fixedly connected.

7. A hydraulic extractor for a rail plug according to claim 5, characterized in that: the connector is a columnar body, the connecting end of the connector is provided with external threads to be connected with a rear oil conveying pipe, the connecting end of the connector is provided with a connecting hole for accommodating the plug end of the plug connector, four radial through holes are uniformly distributed on the side wall of the connecting end, the split ring penetrates through the four radial through holes of the connector and the annular groove of the connecting end of the plug connector simultaneously, the connector and the plug connector are locked and fixedly connected together, the middle of the connector is provided with an oil flow hole, and the oil flow hole of the connector and the oil passing hole of the plug connector are communicated to form an oil path.

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