CN106370152A - Heavy rail clamping device - Google Patents

Abstract

The invention provides a heavy rail clamping device. The clamping device includes a heavy rail upper and lower limit mechanism fixed on the frame, a heavy rail left and right limit mechanism, a pneumatic system and a frame; the heavy rail upper and lower limit mechanism includes a rocker mechanism, a pressing roller protection device, and a drive system. , Horizontal elevation adjustment device; the left and right limit mechanism of the heavy rail includes left and right limit rollers; the pneumatic system includes a press cylinder, a left push cylinder, a right push cylinder, a solenoid valve and other necessary pneumatic components. The clamping device, forcibly limiting and centering the movement of the heavy rail on the roller table, limits the swing of the heavy rail in the horizontal plane and the runout in the vertical plane within the allowable range of the detection requirements, so as to ensure the balance of the heavy rail. Improve the accuracy of straightness detection and improve the accuracy of other related detection equipment.

Description

A heavy rail clamping device

technical field

The invention relates to the field of heavy rail detection, in particular to a position-limiting and centering device for heavy rails in the heavy rail detection process.

Background technique

Flatness is one of the core indicators to measure the quality of high-speed railway heavy rail. When the heavy rail runs stably on the center line of the equipment, the detection efficiency is high and the detection results are reliable. Therefore, when designing the heavy rail inspection center, a guiding device for forcefully limiting the heavy rail is designed, and a control standard for the operating range of the heavy rail is established.

Such as: NDT company standard

The detection length of the heavy rail is up to 100m and the shortest is 9m; the curvature of the heavy rail up and down is ≤1mm/m. Left and right bending ≤ 2mm/m; total length of heavy rail: up and down bending ≤ 0.5%, left and right bending ≤ 1%, torsional bending ≤ 2/10,000, end burrs ≤ 5mm, and the rest meet the requirements of national standards.

Several major rail and beam factories all roll 100-meter heavy rails. The heavy rails do not run in a straight line on the roller table, but advance in a "snake" shape. more obvious when. Due to the uncertainty of the position of the heavy rail, it is difficult for the detection equipment to perform properly, and even cause wrong detection results.

Therefore, it is urgent to solve the above-mentioned problems in the technical field.

Contents of the invention

The purpose of the present invention is to overcome the left and right swing and up and down problems in the detection process of the heavy rail. The present invention provides a clamping device for the heavy rail, which not only limits the swing of the heavy rail in the horizontal plane and the jump in the vertical plane Within the permitted range of testing requirements, the testing accuracy of the straightness of heavy rails can be guaranteed, and the accuracy of other related testing equipment can be improved.

The technical solution adopted by the present invention to solve the technical problem is: additionally install the upper and lower limit mechanism of the heavy rail, the left and right limit mechanism of the heavy rail and the pneumatic system on the frame.

The heavy rail clamping device is composed of four parts: the upper and lower limit mechanism of the heavy rail, the left and right limit mechanism of the heavy rail, the pneumatic system and the frame.

The upper and lower limit mechanism of the heavy rail includes a rocker mechanism, a pressing roller protection device, a drive system, and a horizontal elevation adjustment device. The rocker mechanism comprises a depressing cylinder piston rod, a connecting rod pinned to the depressing cylinder piston rod, an output end frame fixedly connected to the connecting rod; the depressing roller The protection device includes a fixed bracket and a spring. One end of the spring is connected to the fixed bracket, and the other end is connected to the output frame; the drive system includes a drive motor I, a drive motor II, and the The shaft coupling connected to the drive motor II, the sprocket I connected to the drive motor I, the sprocket II matched with the sprocket I, the sprocket I and the chain wound around the sprocket I The chain on the wheel II, the pressing roller connected with the sprocket II, the support roller connected with the coupling; the horizontal elevation adjustment device includes wedge blocks, fixing bolts, adjusting bolts, pressing bolt.

The left and right limit mechanism of the heavy rail includes a left limit roller, a right limit roller cooperating with the left limit roller, a left synchronous gear, and a right synchronous gear cooperating with the left synchronous gear.

In the rocker mechanism, the cylinder piston rod is pin-connected to the connecting rod, and the connecting rod is fixedly connected to the output frame.

In the described level adjustment device, the hold-down bolt is threadedly connected with the lower block of the wedge block.

In the drive system, the rotation axis of the sprocket connected to the drive motor coincides with the rotation axis of the frame at the output end, and the pressing roller is coaxial with the sprocket.

In the left and right limiting mechanism of the heavy rail, the left limiting roller and the left push cylinder are connected by pins, and the right limiting roller and the right pushing cylinder are connected by pins.

The pneumatic system includes two two-position five-way solenoid valves, three cylinders, three throttle valves, one pneumatic three parts, and one air source; in the pneumatic system, the air source is connected to the shut-off valve, and Through a filter, a pressure reducing valve, and a lubricator, the output port of the lubricator is respectively connected to the port P of the reversing valve of the corresponding branch of the left push cylinder, the right push cylinder, and the depress cylinder. The ports A and B of the reversing valve corresponding to the branch of the pushing cylinder are respectively connected to the rodless chamber of the left pushing cylinder 4 and the right pushing cylinder through the one-way throttle valve, and the corresponding reversing chamber of the depressing cylinder The B port of the valve is connected with the rod cavity of the depressing cylinder, and the cylinders I, II and III are all connected with the frame pins.

Due to the adoption of the above-mentioned technical scheme, the advantages of this maintenance platform are:

1. This specific embodiment adopts the left and right limit, the way of pressing up and down, using the rocker mechanism to transmit the power of the depressing cylinder, and using the left synchronous gear and the right synchronous gear to symmetrically transmit the power of the left and right push cylinder to the left , The right limit roller, forcibly limit the heavy rail, effectively make the center line of the heavy rail coincide with the center line of the testing equipment, the heavy rail runs stably, and the guide centering performance is excellent.

2. The upper and lower limit rollers in this specific embodiment are driving rollers, and the power of the driving motor is transmitted to the pressing roller by chain transmission, so that the equipment can also function as a roller table, which can be directly installed after removing the existing roller table, and the upper and lower It clamps and feeds the heavy rail, and has strong rail feeding ability, which can solve the problem that the heavy rail runs stably in the inspection center and the distance between the rollers before and after ultrasonic testing is too large, and the sample rail cannot be fed.

3. In this specific implementation, the left and right clamping limit rollers have the function of self-adjustment. After the installation and commissioning of the guide and centering device are completed, no adjustment is required, which is convenient for maintenance.

4. This specific implementation guide centering has two drive motors, three sets of pneumatic components (including the air source processing system), and adopts programming control with high control accuracy.

5. This specific implementation has a safety protection function. When there is no steam source or power failure on site, the upper and lower limit, left and right limit devices of the equipment are in the open state, and this function is protected by mechanical equipment.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the front view of the heavy rail clamping device of the present invention;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is a schematic diagram of the level adjustment mechanism;

Fig. 4 is a top view of the left and right limit mechanism of the heavy rail;

Fig. 5 is the front view of Fig. 4;

Figure 6 is a schematic diagram of pneumatics.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, which is not intended to limit its protection scope.

Example 1

A heavy rail clamping device. The heavy rail clamping device is shown in Figure 1 and Figure 2: it consists of four parts: the upper and lower limit mechanism of the heavy rail, the left and right limit mechanism of the heavy rail, the pneumatic system and the frame.

As shown in Fig. 1, Fig. 2 and Fig. 3, the upper and lower limit mechanism of the heavy rail includes a rocker mechanism, a pressing roller protection device, a drive system, and a horizontal elevation adjustment device. The rocker mechanism includes a depressing cylinder piston rod 1101, a connecting rod 1102, and an output end frame 1104; the depressing roller protection device includes a fixed bracket 1105 and a rotating shaft 1115; the drive system includes a first drive Motor 1106, second driving motor 1112, shaft coupling 1111, first sprocket 1107, second sprocket 1109, chain 1108, pressing roller 1103, support roller 1110; Described horizontal elevation adjustment device comprises wedge block 1117, Fixing bolt 1113, adjusting bolt 1114, pressing bolt 1116.

As shown in Figure 2, in the rocker mechanism, the depressing cylinder piston rod 1101 is pin-connected to the connecting rod 1102, and the connecting rod 1102 is fixedly connected to the output frame 1104 ;

As shown in Figure 2, in the press-down roller protection device, in the press-down roller protection device, one end of the spring 1215 is fixedly connected to the fixed bracket 1105, and the other end is connected to the output End frame 1104 is fixedly connected;

As shown in Figure 1, in the drive system, the second drive motor 1112 is coupled with the support roller 1110 through a coupling 1111, the first drive motor 1106 is fixedly connected to the sprocket 1107, The sprocket 1107 and the sprocket 1109 adopt a chain drive with a transmission ratio of 1:1, and the sprocket 1109 is coaxially connected with the pressing roller 1103;

As shown in Figure 1, the rotation axis of the sprocket 1107 connected to the first drive motor 1106 in the drive system coincides with the rotation axis of the output end frame 1104, and the pressing roller 1103 and the sprocket 1109 coaxial.

As shown in Figure 1, in the described drive system, the sprocket 1107 connected with the first drive motor 1106 transmits power to the pressing roller 1103 coaxial with the sprocket 1109 through a chain drive, and the output end machine The frame is fixedly coupled with the rotating shaft 1115 and can rotate along with the rotating shaft 1115 .

As shown in FIG. 3 , in the described level adjustment device, the compression bolt 1116 is screwed to the lower slider of the wedge block 1117 .

As shown in Figure 4 and Figure 5, the left and right limit mechanism of the heavy rail includes a left limit roller 2201, a right limit roller 2204 cooperating with the left limit roller, a left synchronous gear 2202, and the The left synchronous gear 2202 cooperates with the right synchronous gear 2203.

As shown in Figure 4, in the left and right limit mechanism of the heavy rail, the left limit roller 2201 and the left push cylinder 2302 are connected by pins, and the right limit roller 2204 and the right push cylinder 2303 are connected by pins. connected by pins.

As shown in Figure 2 and Figure 5, the pneumatic system includes two two-position five-way solenoid valves, three cylinders, three throttle valves, one pneumatic three parts, and one air source; in the pneumatic system , the air source is connected to the shut-off valve, and passes through the filter, the pressure reducing valve, and the lubricator in turn, and the output port of the lubricator is respectively connected to the reversing valve of the branch corresponding to the left push cylinder 2302, the right push cylinder 2303, and the push cylinder 1301 The P port is connected, and the A and B ports of the reversing valve 3304 corresponding to the branch of the left push cylinder 2302 and the right push cylinder 2303 are respectively connected to the rodless cavity of the left push cylinder 2302 and the right push cylinder 2303 through the one-way throttle valve. It is connected with the rod chamber, and the B port of the reversing valve 3305 corresponding to the depressing cylinder 1301 is connected with the rod chamber of the depressing cylinder 1301. The depressing cylinder 1301, the left pushing cylinder 2302, and the right pushing cylinder 2303 are all connected rack pin connection.

A clamping device for a heavy rail provided by the present invention is equipped with the function of limiting left and right swings in the horizontal direction and up and down jumps in the vertical direction, and performs forced positioning and centering on the heavy rail, which is beneficial to ensure the straightness detection of the heavy rail At the same time, it can also improve the measurement accuracy of other testing equipment. The end of the rocker mechanism is connected with a pressing roller 1103, which cooperates with the support roller 1110 to limit the vertical jump of the heavy rail before the heavy rail enters the detection center; the first drive motor 1106 will drive the pressing roller to rotate through the sprocket, Ensure that the linear speed of the pressing roller is the same as the forward speed of the heavy rail during contact; the structure and movement of the left and right push cylinders and the left and right limit rollers are completely symmetrical to ensure the left and right swing limit of the heavy rail in the horizontal direction; the horizontal elevation adjustment device can be adjusted to The upper surface of the back-up roller is level with the lower surface of the heavy rail; the protection device for the hold-down roller lifts the hold-down roller away from the upper surface of the heavy rail by spring force when the power system fails.

The working principle of a heavy rail clamping device provided by the present invention is: the first driving motor 1106 drives the sprocket 1107 to rotate, and the power is transmitted to the pressing roller 1103 connected with the sprocket 1109 through the chain 1108, so that the pressing roller The line speed of 1103 is the same as the forward speed of the heavy rail to reduce the friction when pressing down. After the front end of the heavy rail exceeds the pressing roller 1103, the left limit roller 2201 and the right limit roller 2204 are pushed in the left push cylinder 2302 and the right push cylinder 2303 Under the action, the left and right swings in the horizontal direction of the heavy rail are restricted to the center, and the cylinder 1301 is pressed down to push the piston rod 1101 to drive the connecting rod 1102 to swing downwards, and the output end frame 1104 fixedly connected to the connecting rod 1102 swings downwards at the same time. The roller 1103 presses the upper surface of the heavy rail with a force of 300kg under the action of the pressing cylinder 1301, the support roller 1110 provides forward power for the heavy rail under the action of the second drive motor 1112, and the upper and lower rollers cooperate to limit the vertical movement of the heavy rail. Bounce limitation, when the power system of the machine fails, the spring 1215 whose one end is fixed on the fixed bracket 1105 and the other end is fixed on the output end bracket 1104 lifts the pressing roller off the upper surface of the heavy rail by spring force, which is required during the installation of the heavy rail.

After the installation is completed or the lower roller is worn, there will be an error in the height of the top of the lower roller, which needs to be adjusted at this time. Its adjustment method is as follows:

First loosen the compression bolt 1116, tighten the fixing bolt 1113, adjust the adjustment bolt 1114, and move the upper adjustment block left and right, thereby realizing the vertical height adjustment of the lower roller. After adjusting to an appropriate height, tighten the compression bolt 1116.

Due to the adoption of the above-mentioned technical scheme, the advantages of this maintenance platform are:

1. This specific embodiment adopts the left and right limit, the way of pressing up and down, using the rocker mechanism to transmit the power of the pressing cylinder 1301, and using the left synchronous gear 2202 and the right synchronous gear 2203 to symmetrically transmit the left and right push cylinders The power is driven to the left and right limit rollers, and the heavy rail is forced to limit the position, effectively making the center line of the heavy rail coincide with the center line of the testing equipment, the heavy rail runs stably, and the guide centering performance is excellent.

2. In this specific embodiment, the upper and lower limit rollers are driving rollers, and the power of the first drive motor 1106 is transmitted to the pressing roller 1103 by chain transmission, so that the equipment can also function as a roller table, and the existing roller table can be removed. Direct installation, clamping up and down to feed the heavy rail, strong rail feeding ability, can solve the problem that the heavy rail runs stably in the inspection center and the distance between the rollers before and after ultrasonic testing is too large, and the sample rail cannot be fed.

3. In this specific implementation, the left and right clamping limit rollers have the function of self-adjustment. After the installation and commissioning of the guide and centering device are completed, no adjustment is required, which is convenient for maintenance.

4. This specific implementation guide centering has two drive motors, three sets of pneumatic components (including the air source processing system), and adopts programming control with high control accuracy.

5. This specific implementation has a safety protection function. When there is no steam source or power failure on site, the upper and lower limit, left and right limit devices of the equipment are in the open state, and this function is protected by mechanical equipment.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (3)

1. a kind of heavy rail clamping device is it is characterised in that described clamping device includes the heavy rail bound being fixed in frame Position-limit mechanism, pneumatic system and frame about position mechanism, heavy rail；

The upper and lower position-limit mechanism of described heavy rail includes endplay device, pressure roller protection device, drive system, horizontal Pass line adjustment dress Put；

In described endplay device, pressure cylinder piston rod (1101) is coupled by pin with connecting rod (1102), described connecting rod (1102) it is fixedly connected with outfan frame (1104)；

In described pressure roller protection device, one end of spring (1215) is fixedly connected with fixed support (1105), the other end with Described outfan frame (1104) is fixedly connected；

In described drive system, the second motor (1112) is coupled with backing roll (1110) by shaft coupling (1111), the One motor (1106) is fixedly connected with sprocket wheel (1107), and described sprocket wheel (1107) is adopted with described sprocket wheel (1109) and passes Move the Chain conveyer comparing 1: 1, described sprocket wheel (1109) is coaxial with described pressure roller (1103) to be coupled；

Described horizontal elevation adjusting device includes wedge (1117), fixing bolt (1113), regulating bolt (1114), compression Bolt (1116)；Wherein, hold-down bolt (1116) is threadeded with the sliding block of wedge (1117)；

About described heavy rail, position-limit mechanism includes left limit roller (2201) and the right limit roller of described left limit roller cooperation (2204), the right synchromesh gear (2203) of left synchromesh gear (2202) and described left synchromesh gear cooperation；Wherein, described Coupled by pin between left limit roller (2201) and left push cylinder (2302), described right limit roller (2204) and right push Cylinder is connected by pin between (2303)；

Described pneumatic system include two two five-way electromagnetic valves, three cylinders, three choke valves, pneumatic three-major-items, One source of the gas；Wherein, source of the gas is connected with stop valve, passes sequentially through filter, air relief valve, oil sprayer, the output port of oil sprayer Reversal valve p mouth phase with left push cylinder (2302), right push cylinder (2303) and the corresponding branch road of pressure cylinder (1301) respectively Even, described left push cylinder (2302), a, b mouth warp respectively of the corresponding reversal valve of right push cylinder (2303) branch road (3304) One-way throttle valve is connected with rod chamber with the rodless cavity of left push cylinder (2302), right push cylinder (2303), described pressure The b mouth of the corresponding reversal valve of cylinder (1301) (3305) is connected with the rod chamber of pressure cylinder (1301), pressure cylinder (1301), Left push cylinder (2302), right push cylinder (2303) are all connected with frame pin.

2. heavy rail clamping device according to claim 1 is it is characterised in that in described drive system, with the first driving The sprocket wheel (1107) that motor (1106) is connected passes through Chain conveyer, and power is transmitted to the pressure roller coaxial with sprocket wheel (1109) (1103), outfan frame and rotary shaft (1115) are fixedly connected, and can rotate in company with described rotary shaft (1115).

3. heavy rail clamping device according to claim 1 is it is characterised in that in position-limit mechanism about described heavy rail, institute Coupled by pin between the left limit roller (2201) stated and left push cylinder (2302), described right limit roller (2204) with right Push cylinder is connected by pin between (2303).