CN111707463A

CN111707463A - Valve fatigue test equipment, circuit system and test method

Info

Publication number: CN111707463A
Application number: CN202010602914.0A
Authority: CN
Inventors: 金星; 施玉奇; 丰明阳
Original assignee: CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
Current assignee: China Railway Inspection And Certification Qingdao Vehicle Inspection Station Co ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-09-25
Anticipated expiration: 2040-06-29
Also published as: CN111707463B

Abstract

The application discloses a fatigue test device for a plug valve, which comprises a base; the power device is arranged on the base; the transmission device is arranged on the base and is connected with the power output end of the power device; the reciprocating circular motion of the transmission device is realized under the action of the power device; the fixing device is provided with a plug, the fixing device is arranged on the base and positioned on one side of the transmission device, and a plug handle is connected with the transmission device; and the opening and closing of the plug door can be circularly switched under the action of the transmission device. The technical problems of low efficiency, high cost and low result accuracy of the plug fatigue test in the prior art are solved.

Description

Valve fatigue test equipment, circuit system and test method

Technical Field

The invention belongs to the technical field of detection tests, and particularly relates to a plug fatigue test device, a circuit system and a test method.

Background

Compressed air is widely used on rail vehicles as an important power source. At present, a foundation brake device, a pantograph, an opening and closing mechanism and the like on a railway vehicle all adopt compressed air as a power source. In order to meet the use requirements of compressed air under different conditions, the on-off of the compressed air in a compressed air pipeline of a railway vehicle needs to be controlled through a cock, so that the application number of the cock on the vehicle is large, and the braking performance of the railway vehicle can be directly influenced by the good and bad performance of the cock.

For the cock, standard requirements are provided for various performances of the cock at present, and fatigue life test requirements are provided in various standards. The fatigue test cycle number specified for the stopcock by the above standards varies from 2000 to 10000, and the compressed air pressure for the fatigue test varies from 600 to 1000 kPa.

However, since the attaching manner and structure of the plug are diversified, it is difficult to perform a fatigue test using a general-purpose test device in the plug fatigue test. In the prior art, the main mode is to install the cock on a special mounting plate or bind the cock on a frame by using an iron wire, charge compressed air into an air inlet end of the cock, and perform fatigue test on the cock in a test mode of manually rotating a handle or a knob. However, the labor intensity is high, the test time is long, the test efficiency is low, and the cycle number of the fatigue test cannot be accurately guaranteed; and meanwhile, the manufacturing cost of the test tool can be increased by adopting a mode of installing the plug door by a special installation plate.

Disclosure of Invention

The invention aims to provide a plug fatigue test device, which aims to solve the technical problems of low efficiency, high cost and low result accuracy of the plug fatigue test in the prior art.

In order to realize the purpose, the invention adopts the following technical scheme:

a plug fatigue testing apparatus comprising:

a base;

the power device is arranged on the base;

the transmission device is arranged on the base and is connected with the power output end of the power device; the reciprocating circular motion of the transmission device is realized under the action of the power device;

the fixing device is provided with a plug, the fixing device is arranged on the base and positioned on one side of the transmission device, and a plug handle is connected with the transmission device; and the opening and closing of the plug door can be circularly switched under the action of the transmission device.

Preferably, the base is further provided with a guide device, the guide device is provided with a sliding chute, and the structure of the sliding chute is matched with the structure of the transmission device, so that the transmission device is arranged on the guide device in a sliding manner.

Preferably, the power plant comprises:

the bearing piece is fixed on the base;

the power piece is fixed on the bearing piece, and the power output end of the power piece penetrates through the bearing piece;

and one end of the connecting piece is connected with the power output end of the power piece, and the other end of the connecting piece is connected with the transmission device.

Preferably, the transmission means comprises:

the supporting component is fixedly arranged on the base and extends along the length direction of the base;

the transmission assembly is arranged on the supporting assembly, connected with the power output end of the power device and connected with the cock.

Preferably, the transmission device further comprises a manipulator connected with the transmission assembly; the manipulator is arranged opposite to the cock handle, and the structure of the manipulator is matched with the cock handle, so that the manipulator can clamp the cock handle.

Preferably, the transmission assembly comprises:

the transmission piece is connected with the power output end of the power device and enables the transmission piece to realize the circular reciprocating motion under the action of the power device;

the rotating part is connected with the transmission part, the rotating part is connected with the mechanical arm, and under the action of the transmission part, the rotating part drives the mechanical arm to realize the rotation of circular reciprocation.

Preferably, the transmission member is preferably a rack structure, and one end of the rack is connected with the power output end of the power member;

the rotating part is preferably of a gear structure, and the gear is meshed with the rack so that the gear can rotate along with the movement of the rack; and the gear is connected with the manipulator through a gear shaft.

Preferably, the last oil groove that is provided with of guider, the oil groove is located the below of driving medium, just the both sides limit of driving medium slide set up in the spout, make the driving medium can make a round trip to slide along the guide way.

Preferably, still be provided with fixing device on the base, fixing device includes:

the fixing piece is opposite to and parallel to the supporting component;

the transition piece is arranged on the fixing piece and corresponds to the manipulator, so that the manipulator can clamp the cock handle;

a fastener disposed on the transition piece and through which the plug is secured to the transition piece.

A circuit system of a door plug fatigue test device comprises a control switch SA, a limit switch SQ1, a limit switch SQ2, a relay KA1, a relay KA2 and an electromagnetic reversing valve;

the input end of the control switch SA is connected with the positive electrode of a power supply, the output end of the control switch SA is connected with the input end of a limit switch SQ1, and is connected with the input end of a limit switch SQ2 and the input end of a contact switch of a relay KA 1;

the output end of the limit switch SQ1 is connected with a coil of a relay KA 1;

the input end of a contact switch of the relay KA1 is connected with the input end of a limit switch SQ1, the output end of the contact switch of the relay KA2 is connected with the input end of the contact switch of the relay KA2, and the input end of the contact switch of the relay KA1 is connected with a 1-bit end or a 2-bit end of the electromagnetic directional valve;

one end of a coil of the relay KA1 is connected with the output end of the limit switch SQ1, and the other end of the coil is connected with the negative electrode of the power supply;

the output end of the limit switch SQ2 is connected with one end of a coil of the relay KA 2;

the output end of the KA2 and the output end of the limit switch SQ2 are both connected with one end of a coil of the relay KA1, and the other end of the relay KA1 is connected with the negative electrode of a power supply;

the input end of the electromagnetic directional valve is connected with the output end of a contact switch of the relay KA1, and the output end of the electromagnetic directional valve is connected with the negative pole of the power supply.

A testing method of a cock fatigue testing device,

s1: the cock RI is opened, the electromagnetic directional valve is at the position of 1 position end, and the piston moves to the left;

s2: when the piston moves to the limit switch SQ1, the limit switch SQ1 is triggered to be closed, the coil of the relay KA1 is electrified, the contact switch of the relay KA1 is closed, the electromagnetic reversing valve is reversed to the 2-position end position, the piston moves to the right, and the limit switch SQ1 is disconnected;

s3: when the piston moves to the right position to trigger the limit switch SQ2, the limit switch SQ2 enables the limit switch SQ2 to be closed, at the moment, the coil of the relay KA2 is electrified, the contact switch of the relay KA2 is disconnected, the coil of the relay KA1 is electrified, the contact switch of the relay KA1 is disconnected, the electromagnetic reversing valve is reversed to the 1-position, the piston moves to the left, and the operation is repeated in a circulating mode.

Compared with the prior art, the invention has the advantages and positive effects that:

the invention provides a cock fatigue test device, which is characterized in that a power device, a transmission device and a fixing device are arranged on a base, the power device is connected with the transmission device, the transmission device is fixedly connected with a cock handle on the fixing device, reciprocating circular motion of the transmission device is realized under the action of the power device, and meanwhile, the cyclic conversion of opening and closing of the cock handle is realized under the action of the transmission device. Therefore, by adopting the structure, the automatic running of the fatigue test of the plug is realized, and the fatigue test of the plug is completed without manually rotating the handle or the knob. Therefore, the technical problems of low efficiency, high cost and low result accuracy of the plug fatigue test in the prior art are solved.

Drawings

FIG. 1 is a schematic view of the overall structure of a fatigue testing device for a plug door according to the present invention 1;

FIG. 2 is a schematic view of the overall structure of the fatigue testing apparatus for a plug door of the present invention 2;

FIG. 3 is a schematic view of a partial structure of a fatigue testing apparatus for a plug door according to the present invention 1;

FIG. 4 is a schematic view of a partial structure of a fatigue testing apparatus for a plug door according to the present invention, FIG. 2;

FIG. 5 is a schematic structural diagram 1 of a manipulator of the plug fatigue testing apparatus according to the present invention;

FIG. 6 is a schematic structural diagram 2 of a manipulator of the plug fatigue testing apparatus according to the present invention;

FIG. 7 is a schematic structural view of a fixing member of the fatigue testing apparatus for a plug door according to the present invention;

FIG. 8 is a circuit diagram of a fatigue testing apparatus according to the present invention;

FIG. 9 is a block diagram of a method of testing the fatigue testing apparatus of the present invention.

In the above figures: 1. a base; 2. a power plant; 21. a carrier; 22. a power member; 23. a connecting member; 3. a transmission device; 31. a support assembly; 32. a transmission assembly; 321. a transmission member; 322. a rotating member; 33. a manipulator; 4. a guide device; 41. a guide seat; 42. a guide table; 43. a guide groove; 44. an oil sump; 5. a fixing device; 51. a fixing member; 52. a transition piece; 53. a fastener; 54. mounting grooves; 55. a central slot; 6. and (6) plugging the door.

Detailed Description

The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", "first", "second", etc. indicate orientations or positional relationships based on the positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present application, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; either directly or through an intermediary profile. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Technical scheme in the embodiment of this application is in order to solve among the prior art technical problem that cock fatigue test efficiency is low, with high costs and the result degree of accuracy is low, and the general thinking is as follows:

the invention provides a cock fatigue test device, which is characterized in that a power device 2, a transmission device 3 and a fixing device 5 are arranged on a base 1, the power device 2 is connected with the transmission device 3, the transmission device 3 is fixedly connected with a cock handle on the fixing device 5, reciprocating circular motion of the transmission device 3 is realized under the action of the power device 2, and meanwhile, circular conversion of opening and closing of the cock handle is realized under the action of the transmission device 3. Therefore, by adopting the structure, the automatic running of the fatigue test of the plug door is realized, and the fatigue test of the plug door 6 is completed without manually rotating the handle or the knob. Therefore, the technical problems of low efficiency, high cost and low result accuracy of the plug fatigue test in the prior art are solved.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

A cock fatigue test device is shown in figure 1 and comprises a base 1, wherein a power device 2, a transmission device 3, a guide device 4 and a fixing device 5 are arranged on the base 1.

Specifically, the base 1 is a mounting platform for the power device 2, the transmission device 3 and the fixing device 5, and plays a bearing role, that is, the power device 2, the transmission device 3 and the fixing device 5 are all mounted on the base 1. More specifically, the base 1 is welded by angle steel to form a frame, a mounting plate is welded on the frame, a plurality of through holes are formed in the mounting plate, the through holes are mainly used for mounting other devices, and the connection mode between each device and the base 1 is preferably bolt connection, so that the mounting and dismounting of each device are facilitated.

The power device 2 comprises a bearing part 21, a power part 22 and a connecting part 23.

Specifically, the power member 22 is fixedly disposed on the carrier 21, and a power output end of the power member 22 is connected to the connecting member 23. In this embodiment, the power member 22 is a horizontal-bar double-acting cylinder, and the bearing member 21 is a mounting seat of the cylinder. Specifically, the bearing member 21 includes a bearing plate and a mounting plate, the bearing plate is fixedly mounted on the base 1 through a bolt, and the mounting plate is vertically mounted on the bearing plate. The power output end of the power member 22 is connected to the connecting member 23 through this mounting plate. The power device 2 mainly provides power for the transmission device 3. The specification of the horizontal-bar double-acting cylinder can be selected according to actual requirements, and in the embodiment, the specification is preferably CDG1YB20-25Z, the stroke is +/-60 mm, and the diameter of the cylinder is 100 mm. The coupling member 23 is connected at one end to the power take-off of the power member 22 and at the other end to the transmission 3, whereby the power member 22 can transmit power to the transmission 3.

The transmission device 3 mainly comprises a supporting component 31, a transmission component 32, a guide component and a manipulator 33.

Specifically, the supporting component 31 includes a first supporting plate and a second supporting plate, the second supporting plate is vertically disposed on the first supporting plate, and the length extending direction of the first supporting plate is the same as that of the second supporting plate. Further, the number of the second supporting plates can be designed according to actual needs. In this embodiment, there are two second supporting plates, which are disposed in parallel on the first supporting plate, and there is a gap between the two second supporting plates, and the guiding component and the transmission component 32 are disposed in the gap.

As shown in fig. 2, the transmission assembly 32 includes a transmission member 321 and a rotation member 322. The transmission member 321 is connected to the power output end of the power member 22, so that the transmission member 321 can move along with the movement of the power member 22. Meanwhile, the rotating member 322 is connected to the transmission member 321, so that the transmission member 321 can drive the rotating member 322 to move. In this embodiment, the transmission member 321 is in a rack structure, one end of the transmission member 321 is connected to the connecting member 23 of the power device 2, and the other end of the transmission member 321 extends along the length direction of the first support plate. Meanwhile, in the present embodiment, the rotating member 322 adopts a gear structure. The gear is located between the two second support plates and is disposed on the transmission member 321, and the gear is engaged with the rack, so that the gear rotates along with the movement of the rack. The gear is provided with a gear shaft, and the gear shaft are connected by adopting a flat key. More specifically, both ends of the gear shaft are respectively and fixedly installed on two second supporting plates which are oppositely arranged, and both ends of the gear shaft are respectively provided with a deep groove ball bearing, so that the rotation of the gear is facilitated. Meanwhile, both ends of the gear shaft pass through the second support plate and are connected with the robot 33.

More specifically, as shown in fig. 3, in order to meet the requirement that the plug fatigue testing device tests a plurality of plugs 6 at a time, a mode that one rack drives a plurality of gears to rotate simultaneously is adopted. In this embodiment, the transmission member 321 is provided with three rotation members 322, that is, one rack drives three gears to rotate simultaneously, and it should be noted that the number of the rotation members 322 can be designed according to actual needs. Each rotating piece 322 is connected with two manipulators 33 through a gear shaft, and the structure of the manipulators 33 can be designed according to the structure of the plug 6, so that the fatigue test can be carried out on 6 plugs 6 at the same time. As shown in fig. 5 to 6, there are two structures of a handle and a knob for the cock 6, and thus, the robot arms 33 of the two structures, i.e., the first robot arm 33 and the second robot arm 33, are designed in the present embodiment; the first robot 33 is for gripping the knob and the second robot 33 is for gripping the handle. Meanwhile, the manipulator 33 and the gear shaft are connected through the square inner hole, and the torque of the gear shaft can be more effectively transmitted through the structure. Further, a first manipulator 33 for clamping the knob is a pincerlike arm connected to the knob, the knob is located between the pincerlike arms, the center line of the pincerlike arm is identical to the center line of the knob, and the pincerlike arm is locked by a bolt after being installed in place. The second manipulator 33 for clamping the handle is also a pincer-shaped arm, the handle is positioned between the pincer-shaped arms, when the handle is installed in place, the pincer-shaped arms are locked by bolts, the pincer-shaped arm of the second manipulator 33 is different from the pincer-shaped arm of the first manipulator 33 in that the second manipulator 33 further comprises a mechanical arm, the pincer-shaped arm is arranged on the mechanical arm in a sliding mode, namely the pincer-shaped arm is sleeved on the mechanical arm, so that the pincer-shaped arm can slide along the mechanical arm, a square inner hole is formed in the end portion of the mechanical arm, and the second manipulator 33 is connected with the end portion of the gear shaft through the square inner hole.

As shown in fig. 4, the guide device 4 includes a guide base 41 and a guide table 42, the guide base 41 is fixedly mounted on the base 1 by bolts, and the guide table 42 is disposed on the guide base 41. Specifically, be provided with guide way 43 on the direction platform 42, the extending direction of guide way 43 is unanimous with the extending direction of driving medium 321, and the structure of guide way 43 cooperatees with the structure of rack for the both sides limit of rack can set up in guide way 43, and the rack can make a round trip to slide along the extending direction of guide way 43, prevents the rack at the in-process horizontal hunting of motion, and guide way 43 plays the effect of direction at the in-process of rack motion promptly. Meanwhile, an oil groove 44 is formed in the guide table 42, the oil groove 44 is located below the rack, and the oil groove 44 plays a role in lubricating the rack in the rack moving process.

The fixing device 5 comprises a fixing piece 51, a transition piece 52 and a fastener 53. In this embodiment, the fixing member 51 and the transition member 52 are both plate-shaped. Specifically, as shown in fig. 7, the fixing member 51 is fixedly mounted on the base 1 by bolts, and the extending direction thereof coincides with the length extending direction of the first support plate and the second support plate. Meanwhile, the fixing member 51 is preferably two, that is, a first fixing member 51 and a second fixing member 51. And the two fixing pieces 51 are oppositely arranged at the two edges of the base 1, so that the transmission device 3 is positioned between the two fixing pieces 51. More specifically, a first test area and a second test area are formed between the first fixing member 51 and the second fixing member 51 and the two second support plates, respectively, and the two test areas are used for placing the manipulator and the handle or the knob so that the manipulator and the handle or the knob can complete a test of rotating back and forth in the areas. Further, the transition pieces 52 are fixed on the fixing piece 51 through bolts, and the number of the transition pieces 52 is consistent with that of the tested pieces; meanwhile, the position of the transition piece 52 corresponds to the position of the manipulator 33, so that the cock 6 is arranged opposite to the manipulator 33, so that the manipulator 33 can clamp the cock handle, and the cock 6 can realize opening and closing actions by rotating the handle or the knob, and when the handle or the knob is parallel to the flow direction of the compressed air, the cock 6 is in an opening position; when the handle or the rotating button is vertical to the flow direction of the compressed air, the cock 6 is in a closed position; i.e. a horizontal bar double action. The choke 6 for the plate type structure may be directly mounted on the transition piece 52 by bolts, the choke 6 for the tube type structure may be mounted on the transition plate by fasteners 53, and then the transition plate may be mounted on the fixing piece 51 by bolts. Furthermore, the fixing member 51 is further provided with mounting grooves 54, each transition piece 52 corresponds to two mounting grooves 54, and the two mounting grooves 54 are respectively disposed corresponding to the upper end and the lower end of the transition piece 52. Bolts for mounting the transition piece 52 are fixed through this mounting groove 54, whereby by adopting this structure, the adjustment of the position of the subject plug door 6 during the mounting process can be facilitated. Meanwhile, the middle part of the fixing plate is further provided with a central groove 55, the central groove 55 extends from one end of the fixing member 51 to the other end along the length direction of the fixing member 51, and the tubular cock 6 with an overlong size can be conveniently installed from the back by adopting the structure.

As shown in fig. 8, the invention further provides a circuit system of a plug fatigue test device, which comprises a control switch SA, a limit switch SQ1, a limit switch SQ2, a relay KA1, a relay KA2 and an electromagnetic directional valve;

The invention also provides a testing method of the plug fatigue testing equipment, as shown in fig. 9, specifically:

More specifically, after the fatigue test of the cock is completed, compressed air specified by a standard is filled into the cock, the reciprocating fatigue action between the closing position, the opening position and the closing position of the cock can be realized by controlling the reciprocating motion of the single-rod double-acting air cylinder, and meanwhile, the cycle times of the fatigue test can be recorded and controlled by recording the extending times of the piston of the single-rod double-acting air cylinder by adopting a counter. The control principle and method are shown in fig. 8 and 9.

Specifically, the working principle is as follows: when the cock RI is opened, the electromagnetic directional valve is at the position 1, and the piston moves to the left. When the piston moves to the limit switch SQ1, the limit switch SQ1 is triggered to be closed, at the moment, the coil of the normally open relay KA1 with the timing function is electrified, the contact switch of the normally open relay KA1 with the timing function is closed, the electromagnetic directional valve is switched to the position of the 2-position end, the piston moves to the right, the limit switch SQ1 is disconnected, and due to self-locking, the electromagnetic directional valve is continuously electrified and is continuously kept at the 2-position end. When the piston moves to the right position to trigger the limit switch SQ2, the limit switch SQ2 makes the limit switch SQ2 closed, the coil of the normally closed relay KA2 is electrified, the contact switch of the normally closed relay KA2 is disconnected, the coil of the normally open relay KA1 with the timing function is electrified, the contact switch of the normally open relay KA1 with the timing function is disconnected, the electromagnetic reversing valve is reversed to the 1-position, the piston moves to the left, and the operation is repeated in a circulating mode.

For a clearer explanation of the present application, the working principle of the present invention will be further explained by taking the embodiments shown in fig. 1 to 9 as examples:

the rack is connected with the rack through the power output end of the power part 22, namely, the rack can move back and forth along with the horizontal bar double-acting cylinder when the horizontal bar double-acting cylinder moves back and forth. Meanwhile, since the gear is disposed on the rack and engaged with the rack, the gear is connected to the robot arm 33 through the gear shaft, and the robot arm 33 holds the plug door 6. Therefore, the single-rod double-acting cylinder drives the rack to perform reciprocating linear motion, the rack drives the gear and the gear shaft to perform rotary motion, the gear shaft drives the manipulator 33 to perform rotary motion, and the manipulator 33 is connected with the cock handle, so that reciprocating rotary motion of the cock handle from a closed position to an open position is realized. Therefore, by adopting the device, the automatic running of the fatigue test of the plug can be realized, and the fatigue test of the plug 6 can be completed without manually rotating the handle or the knob. Therefore, the technical problems of low efficiency, high cost and low result accuracy of the plug fatigue test in the prior art are solved.

Claims

1. A plug fatigue test apparatus, comprising:

a base;

the power device is arranged on the base;

2. The cock fatigue testing apparatus as claimed in claim 1, wherein the base is further provided with a guiding device, the guiding device is provided with a sliding groove, and the structure of the sliding groove is matched with the structure of the transmission device, so that the transmission device is slidably arranged on the guiding device.

3. The plug fatigue test apparatus of claim 1, wherein the power plant comprises:

the bearing piece is fixed on the base;

4. A cock fatigue testing device according to any of claims 1-3, characterised in that the transmission means comprises:

5. The cock fatigue testing apparatus of claim 4, wherein the transmission further comprises a manipulator connected to the transmission assembly; the manipulator is arranged opposite to the cock handle, and the structure of the manipulator is matched with the cock handle, so that the manipulator can clamp the cock handle.

6. The cock fatigue testing apparatus of claim 5, wherein the transmission assembly comprises:

7. The cock fatigue testing apparatus as claimed in claim 6,

the transmission part is preferably of a rack structure, and one end of the rack is connected with the power output end of the power part;

8. The plug fatigue testing equipment of claim 2, wherein the guiding device is provided with an oil groove, the oil groove is located below the transmission member, and two side edges of the transmission member are slidably disposed in the sliding groove, so that the transmission member can slide back and forth along the guiding groove.

9. The cock fatigue testing apparatus as claimed in claim 5, wherein the base is further provided with a fixing device, the fixing device comprises:

the fixing piece is opposite to and parallel to the supporting component;

10. A circuit system of a cock fatigue test device is characterized by comprising a control switch SA, a limit switch SQ1, a limit switch SQ2, a relay KA1, a relay KA2 and an electromagnetic reversing valve;

11. A testing method of a cock fatigue testing device is characterized in that,