Railway turnout flash welding machine

Abstract

The invention discloses a railway turnout flash welding machine which comprises a center shaft mechanism, a first clamping device, a second clamping device and a guiding device, upsetting oil cylinders of an upsetting device are installed on the outer side areas of the lower portions of a third box body and a fourth box body of the second clamping device respectively, and the two upsetting oil cylinders are connected with upsetting rod electrodes respectively; the other ends of the two upsetting rod electrodes are respectively connected with the corresponding box body I and the box body II to form a sliding pair; the lower portions of a first box body and a second box body of the first clamping device and the lower portions of a third box body and a fourth box body of the first clamping device are in a gradually-shrinking shape which gathers towards the corresponding jaws from top to bottom. The lower portions of the third box body and the fourth box body and the lower portion of the first box body and the lower portion of the second box body are in a wedge shape gathering towards the extending direction of the rail. The five-axis structure is adopted, so that the bending rigidity and strength are remarkably improved, steel rails which are gradually close to each other on the two sides of the turnout can be prevented from interfering with each other due to the gathering and gradual shrinking of the box body and the wedge-shaped structure, and the device is very suitable for operation in narrow spaces such as turnout areas.

Description

Technical Field

[0001] The invention relates to a turnout welding machine, in particular to a railway turnout flash welding machine, belonging to the technical field of rail transportation. Background Art

[0002] The weld seam at the railway turnout is not welded with a traditional flash welder because the distance between the two rails is very close. According to the applicant, for a long time, the weld seams at the turnout position have usually been welded with thermite welding or manual welding, followed by nodule pushing, and the welding quality is difficult to guarantee. A search shows that the Chinese patent document with the announcement number CN213257640U discloses a railway turnout rail welding machine. Although it manages to solve the welding problem in the narrow space of the turnout area and mentions the pressure-maintaining nodule pushing function, it fails to provide a reasonable installation structure, method and position of the pressure-maintaining nodule pushing mechanism that is suitable for the size of the turnout welding machine box. In addition, the patent document fails to provide an effective solution to the problems existing in welding before and after the turnout.

[0003] In addition to the above search, Chinese patent documents with announcement numbers CN218090329U and CN116511673A were also retrieved, which respectively disclosed two rail welding machines suitable for narrow clamping seats. Since they have a pressure-maintaining and nodule-pushing mechanism, they can solve the nodule-pushing problem after welding. However, both welding machines adopt an inverted "three-axis structure" in the shape of an inverted triangle, that is, two guide shafts are set on both sides of the upper part on the basis of the top forging of the central axis mechanism set in the box. The problem reflected in practice is: since the height distance between the axis of the top forging cylinder and the center plane of the rail increases, the position of the top forging force is increased, so the bending moment generated on the top forging shaft during the top forging increases. Once the rigidity of the top forging shaft is insufficient, the rail will bend accordingly, resulting in the phenomenon that the weld joint is lower than the parent material of the rails on both sides, commonly known as "low joint". Secondly, the various cables required to connect the rail welding machine are very complicated, and the rotation during operation can easily cause the cables to bend and damage. Summary of the invention

[0004] The purpose of the present invention is to address the problem of poor bending resistance of the "three-axis structure" in the prior art, and to provide a railway turnout flash welding machine that can complete welding and pushing nodules in a narrow space and has significantly improved bending rigidity and strength through structural improvement, thereby ensuring that the welding quality meets the requirements of railway welding standards.

[0005] To achieve the above object, the present invention provides the following technical solution: a railway turnout flash welding machine is proposed, comprising: The central axis mechanism is composed of a hollow axis and a core shaft inserted therein to form a moving pair; The first clamping device is composed of a box body 1 and a box body 2 respectively hingedly mounted on both sides of one end of the central axis mechanism; The second clamping device is composed of a box body three and a box body four respectively located at two sides of the other end of the central axis mechanism and respectively hingedly mounted on the other end of the central axis mechanism; The guide device is composed of guide shafts extending from the upper parts of the box body 1 and the box body 2 respectively and correspondingly inserted into guide sleeves on the upper parts of the box body 3 and the box body 4; A first transverse clamping oil cylinder and a second transverse clamping oil cylinder are respectively installed between the tops of the boxes 1 and 2 and between the tops of the boxes 3 and 4, and opposing jaws are respectively installed between the lower parts of the boxes 1 and 2 and between the lower parts of the boxes 3 and 4; The lower outer regions of the box body three and the box body four are respectively provided with upsetting cylinders of the upsetting device, and the two upsetting cylinders are respectively connected to upsetting rod electrodes; the other ends of the two upsetting rod electrodes are respectively connected to the corresponding box body one and box body two to form a moving pair; The lower parts of the boxes one and two and the lower parts of the boxes three and four are respectively tapered from top to bottom toward the corresponding jaws; the lower parts of the boxes three and four to the lower parts of the boxes one and two are respectively wedge-shaped and converge toward the extension direction of the track.

[0006] The "five-axis structure" formed by the central axis mechanism, two upper left and right guide shafts, and two lower left and right forging rod electrodes of the present invention significantly improves the bending rigidity and strength, and the convergent and tapered as well as the wedge-shaped structure of the box body can avoid interference between the gradually approaching rails on both sides of the turnout, and is very suitable for operations in narrow spaces such as the turnout area.

[0007] The aforementioned railway turnout flash welding machine, the outer ends of the hollow shaft and the core shaft of the central axis mechanism are respectively equipped with rail lifting devices; the rail lifting device contains a rail lifting cylinder located on the central axis mechanism, the downward telescopic connection end of the rail lifting cylinder is hinged to the upper ends of a pair of connecting rods distributed in an "eight" shape, the lower end of the connecting rod is hinged to the upper end of the clamp, and the lower end of the clamp has a bend facing the track.

[0008] In the aforementioned railway turnout flash welding machine, the outer ends of the lower parts of the box body three and the box body four are respectively equipped with a tumor pushing device, and the tumor pushing device includes a tumor pushing cylinder passing through the jaws at the bottom of the box body, and a tumor pushing knife seat is installed at the end of the piston rod of the tumor pushing cylinder, and a tumor pushing knife is arranged between the tumor pushing knife seat and the first clamping device. After welding is completed, the clamping device maintains the clamping state, and the pistons of the two tumor pushing cylinders extend synchronously to push the tumor pushing knife seat and the tumor pushing knife to complete the pressure-maintaining tumor pushing operation.

[0009] The aforementioned railway turnout flash welding machine has a clamping and centering mechanism composed of a matching structure centering block installed on the hollow shaft and the core shaft. The centering blocks of the clamping and centering mechanism are respectively suspended with the lower end of the π-shaped hanger of the suspension device, and the suspension device also contains a rotary connector located on one side of the π-shaped hanger. The hanger is used to bear the weight of the welding machine and suspend the machine head. The rotary connector is used to connect the cable, and its input and output ends can rotate at any angle relative to each other, thereby allowing the cable to rotate at any angle. When the welding machine rotates, the input end of the rotary connector and the cable at its input end are fixed, and the cable at the output end is connected to the welding machine and rotates with the welding machine.

[0010] In the aforementioned railway turnout flash welding machine, the guide device includes two mutually matching guide shafts and guide sleeves, the guide shafts are respectively mounted on box body one and box body two, the guide sleeves are respectively mounted on box body three and box body four, and there is an insulating structure between the guide shafts and the box bodies; when the first clamping device and the second clamping device are close to each other and the latter are away from each other, the guide shaft moves axially in the guide sleeve during upsetting, and the two guide shafts, two upsetting rods and the central axis form a five-axis structure, which jointly resists the bending in the vertical direction caused by the upsetting force, thereby avoiding low joints. And because both ends of the five shafts are mounted between the first clamping device and the second clamping device, the synchronization of the movement of the clamping devices on both sides and the centering accuracy are guaranteed. In addition, welding transformers are respectively installed at the outer ends of box body one and box body two of the first clamping device, and the lowest point of the welding transformer is higher than the supported rail.

[0011] Beneficial effects: The present invention utilizes the top forging electrode shaft to form a moving pair between two relative boxes, forming an X-shaped distributed "five-axis structure", which significantly improves the bending rigidity and strength. The lower part of the box adopts a tapered lower end that converges toward the middle and a wedge-shaped structure along the length of the rail, which realizes the installation space of the push-up cylinder and ensures the strength of the tapered lower end of the box. In addition, the welding machine also has a rotatable suspension device to ensure the smooth rotation of the existing welding machine. Without the need for the construction vehicle to turn around, the welding machine can complete the joint welding before and after the fork by rotating 180°. The front and rear ends of the welding machine also have a rail lifting function, which can improve the centering accuracy of the rail in the vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0013] Figure 2 Yes, this is a partial cross-sectional diagram looking up.

[0014] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional exploded structure of an embodiment.

[0015] Figure 4 yes Figure 1Schematic diagram of the three-dimensional structure of the first clamping device in the embodiment.

[0016] Figure 5 yes Figure 1 Schematic diagram of the three-dimensional structure of the second clamping device in the embodiment.

[0017] Figure 6 yes Figure 1 Schematic diagram of the clamping state structure of the embodiment.

[0018] Figure 7 yes Figure 1 A schematic diagram of the structure in a released state of an embodiment.

[0019] Figure 8 yes Figure 1 Schematic diagram of the welding position structure of the embodiment.

[0020] Fig. 9 yes Figure 1 A schematic diagram of the three-dimensional structure of the suspension device of the embodiment.

[0021] Fig.10 yes Figure 1 Schematic diagram of the structure of the rail lifting device in the loosened state of the embodiment Fig.11 yes Figure 1 A schematic structural diagram of the rail lifting device in the lifting state of the embodiment.

[0022] In the figure: central axis mechanism 1, mandrel 101, hollow shaft 102, first clamping device 2, box 1 201, box 2 202, transverse clamping cylinder 203, clamping centering mechanism 204, welding transformer 205, jaws 206, second clamping device 3, box 3 301, box 4 302, upsetting device 4, upsetting cylinder 401, upsetting rod electrode 402, tumor pushing device 5, tumor pushing cylinder 501, tumor pushing tool holder 50 2. Tumor-pushing knife 503, guide device 6, guide shaft 601, guide sleeve 602, suspension device 7, rotary connector 701, rotary connector inlet end 7011, rotary connector outlet end 7012, hanger 702, rail lifting device 8, rail lifting cylinder 801, telescopic connection end 802, connecting rod 803, clamp 804, front weld 901, rear weld 902, switch core 903, track 10, positioning block 11. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0024] This embodiment provides a railway turnout flash welding machine, such as Figure 1-7As shown, it includes a central axis mechanism 1 consisting of a hollow shaft 102 and a core shaft 101 inserted therein to form a moving pair. The hollow shaft 102 and the core shaft 101 are equipped with a clamping and centering mechanism 204 consisting of matching centering blocks. One end of the hollow shaft 102 is hingedly mounted with a box body 1 201 and a box body 2 202 located on both sides thereof, forming a first clamping device 2; and the other end of the hollow shaft 102 is hingedly mounted with a box body 3 301 and a box body 4 302 located on both sides thereof, forming a second clamping device 3. The outer ends of the box body 1 201 and the box body 2 202 of the first clamping device 2 are respectively equipped with welding transformers 205. A transverse clamping oil cylinder 203 is respectively installed between the top of the box 1 201 and the box 2 202 of the first clamping device 2 and between the top of the box 3 301 and the box 4 302 of the second clamping device 3, and opposing jaws 206 are respectively installed between the box 1 201 and the lower part of the box 2 202 and between the box 3 301 and the lower part of the box 4 302. The outer end of the lower part of the box 3 301 and the box 4 302 is installed with a tumor pushing device 5, which is composed of a tumor pushing oil cylinder 501 and a tumor pushing knife seat 502 and a tumor pushing knife 503 installed at the telescopic end of the tumor pushing oil cylinder 501.

[0025] The lower parts of box body 1 201 and box body 2 202 of the first clamping device 2, and the lower parts of box body 3 301 and box body 4 302 of the second clamping device 3, respectively, are tapered from top to bottom toward the corresponding jaws; and the parts from the lower parts of box body 3 301 and box body 4 302 of the second clamping device 3 to the lower parts of box body 1 201 and box body 2 202 of the first clamping device 2 are wedge-shaped, converging toward the extension direction of the track. The thickness of the jaw seat gradually becomes thinner from the second clamping device to the first clamping device. The jaw seat on the first clamping device is a narrow jaw seat that can adapt to the narrow space of the turnout. The jaw seat on the box three and box four is thicker, which can meet the installation requirements of the pusher device. With the 180° rotatable suspension device, the first clamping device is always facing the side where the rail spacing gradually narrows. The welding of the front and rear of the turnout and the point rail can be completed without the need for the engineering vehicle to turn around. The action point of the pusher cylinder can be flush with the middle of the rail waist, ensuring the best action point for pushing the knob. Therefore, it is very suitable for Figure 8 It is suitable for working in confined spaces such as the turnout area shown.

[0026] The upper parts of the box body 1 201 and the box body 2 202 of the first clamping device 2 extend the guide shaft 601 corresponding to the upper guide sleeve 602 of the box body 3 301 and the box body 4 302 of the second clamping device 3, respectively, so as to form the guide device 6. In addition, the outer sides of the lower parts of the box body 3 301 and the box body 4 302 of the second clamping device 3 are respectively equipped with the upsetting oil cylinder 401 of the upsetting device 4, and the two upsetting oil cylinders 401 extend through the lower parts of the box body 3 301 and the box body 4 302 and then insert the corresponding upsetting rod electrode 402 of the box body 1 201 and the box body 2 202 of the first clamping device 2. Thus, the "five-axis structure" formed by the central axis mechanism 1 and its two upper left and right guide shafts 601 and the two lower left and right upsetting rod electrodes 402 is formed. Therefore, the bending rigidity and strength are significantly improved. The upsetting rod electrode is insulated and installed with the corresponding box body, and the function of the upsetting oil cylinder is to pull the upsetting electrode shaft and the corresponding box body on which the upsetting electrode shaft is installed. During welding, the upsetting cylinder and the push-knob cylinder are both facing the side away from the switch center, so as to avoid interference with the rails approaching gradually on both sides of the switch.

[0027] like Fig. 9 As shown, the centering blocks of the clamping centering mechanism 204 on the hollow shaft 102 and the core shaft 101 are respectively suspended with the lower end of the π-shaped hanger 702 of the suspension device 7, and the suspension device 7 also contains a rotary connector 701 located on one side of the π-shaped hanger 702; the rotary connector 701 has a rotary connector inlet end 7011 and a rotary connector outlet end 7012. The π-shaped hanger 702 is used to bear the weight of the welding machine and suspend the machine head, and the rotary connector 701 is used to connect the cable, and its inlet end and outlet end can be rotated at any angle relative to each other, thereby allowing the cable to rotate at any angle. When the welding machine rotates, the rotary connector inlet end 7011 and the cable at the inlet end are fixed, and the cable at the outlet end is connected to the welding machine and rotates with the welding machine.

[0028] like Figure 10-11 As shown, the outer ends of the hollow shaft 102 and the mandrel 101 of the central axis mechanism 1 are respectively equipped with a rail lifting device 8, which contains a rail lifting cylinder 801 located on the central axis mechanism 1, and the downward telescopic connection end 802 of the rail lifting cylinder 801 is hinged to the upper ends of a pair of connecting rods 803 distributed in an "eight" shape, and the lower end of the connecting rod 803 is hinged to the upper end of the clamp 804, and the lower end of the clamp 804 has an elbow facing the track 10. In this way, when necessary, the rail lifting cylinder 801 can be lifted by contraction, and the elbow of the clamp 804 can be naturally leaned against the track under the action of its own weight through the connecting rod 803, so as to clamp and lift it. When the positioning block 11 of the welding machine does not fall on the rail, the rail lifting device can lift the rail so that the rail is close to the positioning block 11 of the welding machine, and the clamping and welding of the rail are completed.

[0029] When the welding machine of this embodiment performs welding operation of the fork front weld, the rail welding machine is suspended vertically by the suspension device, such as Figure 8As shown, the closer to the rudder core 903, the narrower the distance between the rails 10. Therefore, when welding the front weld 901, the welding machine should be rotated to the following orientation: the first clamping device 2 should be on the side close to the rudder core, and the second clamping device 3 should be on the side away from the rudder core, so as to avoid the interference between the push cylinder and the gradually narrowing rail 10; on the contrary, when welding the rear weld 902, the second clamping device 3 should also be on the side away from the rudder core to avoid interference.

[0030] After the clamping device is fully opened, the welding machine descends vertically. Since the box body adopts a sunken jaw seat and is designed in a wedge-shaped structure in the horizontal direction to fit the gradually narrowing space of the turnout, it ensures that the jaw seats on the same side of the first clamping device and the second clamping device can be smoothly inserted between the two rails 10.

[0031] When the welding machine is completely placed on the rail 10, the two horizontal clamping cylinders extend at the same time, and the first clamping device 2 and the second clamping device 3 are clamped synchronously. The clamping and centering mechanism on the first clamping device and the second clamping device and the five-axis structure formed by the two guide shafts, two upsetting rod electrodes and the center axis ensure the centering accuracy of the clamped rails 10 on both sides; and the height dimension of the sunken jaw seat can avoid interference with the adjacent rails 10.

[0032] After the rails 10 to be welded on both sides are clamped, flashing and upsetting are completed under the action of the upsetting cylinder 401; after the upsetting is completed, the first clamping device 2 and the second clamping device 3 remain in the clamping state, and the piston rod of the push-block cylinder 501 extends to push the push-block knife seat 502 and the push-block knife 503 to complete the pressure-maintaining push-block.

[0033] After welding is completed, the clamping device is fully opened, the welding machine is lifted off the track 10, and after rotating 180°, the first clamping device is still on the side close to the rut core, and the second clamping device is on the side away from the rut core, completing the welding of the rear weld.

[0034] As above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A railway turnout flash welding machine, comprising: The central axis mechanism is composed of a hollow axis and a core shaft inserted therein to form a moving pair; The first clamping device is composed of a box body 1 and a box body 2 respectively hingedly mounted on both sides of one end of the central axis mechanism; The second clamping device is composed of a box body three and a box body four respectively located at two sides of the other end of the central axis mechanism and respectively hingedly mounted on the other end of the central axis mechanism; The guide device is composed of guide shafts extending from the upper parts of the box body 1 and the box body 2 respectively and correspondingly inserted into guide sleeves on the upper parts of the box body 3 and the box body 4; A first transverse clamping oil cylinder and a second transverse clamping oil cylinder are respectively installed between the tops of the boxes 1 and 2 and between the tops of the boxes 3 and 4, and opposing jaws are respectively installed between the lower parts of the boxes 1 and 2 and between the lower parts of the boxes 3 and 4; It is characterized in that: the lower outer areas of the box body three and the box body four are respectively equipped with upsetting cylinders of the upsetting device, and the two upsetting cylinders are respectively connected to the upsetting rod electrodes; the other ends of the two upsetting rod electrodes are respectively connected to the corresponding box body one and box body two to form a moving pair; The lower parts of the boxes one and two and the lower parts of the boxes three and four are respectively tapered from top to bottom toward the corresponding jaws; the lower parts of the boxes three and four to the lower parts of the boxes one and two are respectively wedge-shaped and converge toward the extension direction of the track.

2. The railway turnout flash welding machine according to claim 1, characterized in that: The outer ends of the hollow shaft and the core shaft of the central shaft mechanism are respectively provided with rail lifting devices.

3. The railway turnout flash welding machine according to claim 2, characterized in that: The rail lifting device comprises a rail lifting cylinder located on a central axis mechanism, the downward telescopic connection end of the rail lifting cylinder is hinged to the upper ends of a pair of connecting rods distributed in an "eight" shape, the lower end of the connecting rod is hinged to the upper end of the clamp, and the lower end of the clamp has a bend facing the rail.

4. The railway turnout flash welding machine according to claim 1, characterized in that: The outer ends of the lower parts of the box body three and the box body four are respectively provided with a tumor pushing device.

5. The railway turnout flash welding machine according to claim 4, characterized in that: The tumor pushing device comprises a tumor pushing cylinder passing through the jaws at the bottom of the box body, a tumor pushing knife seat is installed at the end of the piston rod of the tumor pushing cylinder, and a tumor pushing knife is arranged between the tumor pushing knife seat and the first clamping device.

6. The railway turnout flash welding machine according to claim 1, characterized in that: The hollow shaft and the core shaft are provided with a clamping and centering mechanism consisting of centering blocks with matching structures.

7. The railway turnout flash welding machine according to claim 6, characterized in that: The centering blocks of the clamping and centering mechanism are respectively connected to the lower ends of the π-shaped hangers of the suspension device.

8. The railway turnout flash welding machine according to claim 1, characterized in that: The guide device comprises two mutually matching guide shafts and guide sleeves, wherein the guide shafts are respectively mounted on the first box and the second box, and the guide sleeves are respectively mounted on the third box and the fourth box.

9. The railway turnout flash welding machine according to claim 8, characterized in that: An insulating structure is provided between the guide shaft and the box body.

10. The railway turnout flash welding machine according to claim 1, characterized in that: The outer ends of the first box body 1 and the second box body of the first clamping device are respectively equipped with welding transformers.

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