CN215727422U - Creep test device under high temperature environment - Google Patents

Abstract

A creep test device in a high-temperature environment comprises a power-off unloading protection system, which is provided with a control cylinder, an execution cylinder and an adjusting cylinder, wherein the control cylinder and the execution cylinder are communicated with each other and respectively contain hydraulic agents; the tray is arranged in the execution cylinder and used for bearing the weight after being pushed and lifted by the hydraulic agent in the execution cylinder so as to unload the test sample; the adjusting cylinder is provided with an adjusting component for adjusting the change of the volume cavity of the adjusting cylinder, and the volume cavity of the adjusting cylinder interacts with the hydraulic agent in the control cylinder or the execution cylinder through the change of the volume of the adjusting cylinder so as to adjust the height of the tray. The utility model can unload the sample when the power is off, and reduce the power loss and the floor area additionally generated by unloading facilities.

Description

Creep test device under high temperature environment

Technical Field

The utility model relates to the field of metal sample mechanical property tests, in particular to a creep test device in a high-temperature environment.

Background

The high-temperature creep test is a metal material mechanical property test which comprises the steps of heating a rod-shaped or plate-shaped metal sample to a test temperature through a heating furnace, applying a certain load through a loading system such as a weight and measuring the deformation performance of the rod-shaped or plate-shaped metal sample under a specific temperature and load condition. The test time of high temperature creep test with monthly meter, reaches several years even, in case take place the outage accident and lead to the heating furnace to shut down promptly in the testing process, the sample is cooled down rapidly under load state promptly, makes the sample produce the fracture rapidly to make manpower, equipment and the time cost merit that experimental earlier stage was put into lose one and be short of one and a little.

For solving the fracture problem that the temperature leads to at the load after the sample outage, CN201410633401.0 discloses a mechanical type creep experiment machine experiment work piece article protection device after outage, and it adopts the permanent magnet to adsorb the tray and compresses the spring, and permanent magnet magnetism disappears and makes the spring recover after the outage to rise the tray in order to bear the weight by the spring, and then unload the sample. Therefore, the test sample can not be broken even if the temperature of the test sample is reduced along with the power failure of the heating furnace, and the creep device can be reheated and loaded after being electrified to continuously complete the high-temperature creep test. However, the weight of the existing high-temperature creep test is dozens of kilograms, and the weight is ton, if the weight needs to be completely supported by the tray to achieve the purpose of unloading, the spring is required to provide enough vertical thrust, so that the electromagnet needs to generate strong adsorption force to the tray to press the spring when the spring is in a compression state, and the electromagnet needs larger power. Because the test period of the high-temperature creep test is too long, although the protection device only works when the power is cut off, the protection device still needs to maintain the state that the electromagnet adsorbs the tray and continues until the test is finished, and therefore, the electric energy is meaningless wasted.

For reducing the energy waste, CN202939088U discloses a creep deformation machine outage sample protection device, it is showing through lever structure and has improved the weight of the weight that the balancing weight can hold up in the whereabouts of permanent magnet outage back, adsorbs the balancing weight of less weight through the permanent magnet of less power, and in the whereabouts in-process of balancing weight after the outage, makes the tray hold up heavier weight by the mode of its moment of lever increase. Although the technical scheme solves the problem that the high-power permanent magnet wastes energy, the volume or the occupied area of the whole creep test device is greatly increased due to the lever, and the implementation in a test field with a limited field is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a creep test device in a high-temperature environment, which can reduce power loss while unloading a sample in case of power failure and reduce the additionally-generated floor area of an unloading facility.

In order to solve the technical problems, the utility model adopts the specific scheme that: a creep test device in a high-temperature environment comprises a rack, a sample clamping system, a sample heating system, a sample loading system and a power-off unloading protection system, wherein the sample clamping system, the sample heating system and the sample loading system are arranged on the rack, the sample loading system comprises weights, pull ropes for connecting the weights to the sample clamping system, the power-off unloading protection system comprises a control cylinder, an execution cylinder and an adjusting cylinder, the control cylinder and the execution cylinder are vertically distributed, the top of the control cylinder and the top of the execution cylinder are arranged in an open mode, the control cylinder and the execution cylinder are mutually communicated and respectively contain hydraulic agents, a piston is arranged in the control cylinder, a balancing weight is arranged at the top of the piston, an annular clamping groove is formed in the periphery of the piston, the clamping groove is matched with a power-off action assembly arranged on the control cylinder, the power-off action assembly is used for transversely clamping a limiting piston in a power-on state, and after power is off, the limiting on the piston is released, so that the piston slides downwards under the action of the balancing weight; the tray is arranged in the execution cylinder and used for bearing the weight after being pushed and lifted by the hydraulic agent in the execution cylinder so as to unload the test sample; the adjusting cylinder is provided with an adjusting component for adjusting the change of the volume cavity of the adjusting cylinder, and the volume cavity of the adjusting cylinder interacts with the hydraulic agent in the control cylinder or the execution cylinder through the change of the volume of the adjusting cylinder so as to adjust the height of the tray.

Preferably, the adjusting cylinder is arranged at one side of the lower part of the executing cylinder, a partition plate is arranged in the cylinder body of the adjusting cylinder in a sliding manner, and a flexible bag communicated with the executing cylinder is arranged in the cylinder body at one side of the partition plate; the adjusting component is a screw rod which is in threaded fit with the cylinder wall of the cylinder body, one end of the screw rod extends into the cylinder body and is in running fit with a shaft seat arranged on the partition plate, and the other end of the screw rod is positioned outside the cylinder body and is provided with a driving piece.

Preferably, the adjusting cylinder comprises a cylinder plate arranged in the execution cylinder in a sliding manner and a sleeve-shaped flexible connection, one end of the flexible connection is butted with the cylinder plate along the circumferential direction of the cylinder plate, the other end of the flexible connection is fixed on the inner side of the cylinder wall of the execution cylinder, and a volume cavity is enclosed by the cylinder plate, the flexible connection and the corresponding cylinder wall of the execution cylinder; the adjusting component is a screw rod which is in threaded fit with the wall of the execution cylinder, one end of the screw rod extends into the execution cylinder and is in running fit with the cylinder plate, and the other end of the screw rod is positioned outside the execution cylinder and is provided with a driving piece.

Preferably, the creep testing device comprises a control cylinder and a plurality of execution cylinders, wherein the adjusting cylinder is connected with the control cylinder, and the execution cylinders are respectively and correspondingly arranged below weights of different creep testing devices.

Preferably, the outage action subassembly includes the joint axle, spring and electro-magnet, joint axle sliding fit installs in the horizontal slide opening of seting up in the jar wall of control jar, the inner of joint axle stretches into in the control jar and forms the joint end with joint groove complex, the outer end of joint axle is equipped with the permanent magnet, the electro-magnet is used for adsorbing the permanent magnet and maintaining the joint state of joint end and joint groove under the on-state, the spring is compression state and is used for promoting the joint axle and outwards moves so that the joint end breaks away from the joint groove after the electro-magnet outage.

Preferably, the power-off action assembly comprises a clamping shaft, a controller and a driving element, the clamping shaft is installed in a horizontal sliding hole formed in the cylinder wall of the control cylinder in a sliding fit mode, the inner end of the clamping shaft extends into the control cylinder and forms a clamping end matched with the clamping groove, the controller is in signal connection with a power-off sensor and a UPS power supply source, the power-off sensor is used for detecting the power supply state of the creep test device, a control program is arranged in the controller, and the control program is used for connecting the driving element to the UPS power supply source after the power-off sensor detects the power-off state so as to drive the clamping end of the clamping shaft to be separated from the clamping groove.

Preferably, the driving element is an electromagnet which is fixed on the cylinder wall of the control cylinder and is distributed at intervals with the outer end of the clamping shaft, and the outer end of the clamping shaft is provided with a permanent magnet which is used for enabling the electromagnet to be in adsorption fit.

Preferably, the driving element is a motor, a screw rod is connected to an output shaft of the motor, and a nut which is installed in a matched mode with the screw rod is arranged in the clamping shaft.

Preferably, the clamping shaft is provided with a roller which is matched with the horizontal sliding hole or the clamping groove in a rolling way.

Preferably, the level of hydraulic fluid in the actuating cylinder is lower than the level of hydraulic fluid in the control cylinder, and the inner diameter of the actuating cylinder is smaller than the inner diameter of the control cylinder.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the balancing weight is clamped in the control cylinder through the piston through the power-off action component, the control cylinder and the execution cylinder are filled with hydraulic agents which are mutually communicated, and the clamping action on the piston is released by the power-off action component after power failure, so that the piston slides downwards under the action of gravity of the balancing weight, and the tray in the execution cylinder is pushed to ascend, the weight is supported, and the unloading of a sample is completed.

2. In the utility model, the power-off action component is blocked in a transverse clamping manner, and in a preferred embodiment, the clamping shafts which are transversely distributed are matched with the piston through the rollers to reduce friction force, so that when a small axial force is applied to the clamping shafts, the clamping shafts can be driven to move to release the clamping action on the piston to release the balancing weight, and further, the power consumption of the power-off action component can be obviously reduced. In a further preferred embodiment, the high-temperature creep device is shut down in a normal test process by adopting the cooperation of the controller, the UPS and the power failure sensor, and the clamping shaft is driven to act by a driving element such as an electromagnet or a motor and the like only after power failure, so that energy waste is avoided.

3. The main body of the high-temperature creep test device is the control cylinder and the execution cylinder which are arranged in parallel and are vertically distributed, so that the space occupied by a power-off protection system is not excessively increased, the improvement and the upgrade in the existing high-temperature creep test site are facilitated, the high-temperature creep test device is not limited by sites, and the popularization is facilitated. In a preferred embodiment, the liquid level in the control cylinder is higher than that of the execution cylinder, and communication holes for communicating the inside and the outside of the control cylinder are respectively formed on two sides of the clamping groove on the piston. The communicating hole is blocked by the matching of the clamping shaft in the initial state, the clamping shaft after power failure moves to remove the blocking effect and then communicates the inside and the outside of the control cylinder, so that the hydraulic agent in the control cylinder is flushed into the execution cylinder under the combined action of the balancing weight and the atmospheric pressure, and the tray is driven to rise to lift the weight to complete unloading. On the basis of the action of atmospheric pressure, the weight of the balancing weight can be selected to be far less than that of the weight, so that the power consumption of a driving element required for driving the clamping shaft to move is further reduced, the specifications of the control cylinder and the execution cylinder are further reduced, and the transformation of the existing compact test site is facilitated.

Drawings

FIG. 1 is a schematic structural view of example 1 of the present invention;

FIG. 2 is a schematic diagram of a portion of the de-energizing assembly of FIG. 1;

FIG. 3 is a schematic structural diagram of a power-off operation component part in embodiment 2 of the present invention;

FIG. 4 is a schematic structural diagram of a power-off operation component part according to embodiment 3 of the present invention;

FIG. 5 is a schematic structural view in example 4 of the present invention;

the labels in the figure are: 1. the hydraulic control device comprises an adjusting cylinder, 101, a flexible bag, 102, a screw rod, 103, a hand wheel, 104, a nut, 105, a partition plate, 106, a cylinder body, 107, a cylinder plate, 108, a flexible connection, 2, a tray, 3, an execution cylinder, 4, a weight, 5, a pull rope, 6, a hanging ring, 7, a balancing weight, 8, a piston, 9, a power-off action component, 901, a large roller, 902, a small roller, 903, a clamping shaft, 904, an electromagnet, 905, a permanent magnet, 906, a spring, 907, a cover cylinder, 908, a motor, 909, a lead screw, 910, a screw nut, 10, a control cylinder, 11, a hydraulic agent, 12, a communication pipe, 13, a horizontal sliding hole, 14, a clamping groove, 15 and a communication hole.

Detailed Description

The creep test device in the high-temperature environment is the same as conventional high-temperature creep equipment, and comprises a rack, and a sample clamping system, a sample heating system, a sample loading system and a power-off unloading protection system which are arranged on the rack. The clamping system comprises an upper clamp and a lower clamp, wherein the upper clamp is used for clamping the upper end of a fixed sample, the lower clamp is used for clamping the lower end of the fixed sample, and after the sample is clamped and fixed through the upper clamp and the lower clamp, the sample is kept in a vertical distribution state. The lower clamp is fixed on the rack, the upper clamp is connected with the sample loading system, and the sample loading system transfers the load to the sample through the upper clamp. The sample heating system comprises a heating furnace and a temperature control assembly for controlling the temperature in the heating furnace. In the test process, the heating furnace is closed, the sample is adjusted to the central position of the heating furnace, and the temperature in the heating furnace is adjusted through the temperature control assembly, so that the sample is maintained at the designed temperature. The sample loading system is a weight 4, a pull rope 5 is connected to the weight 4, the pull rope 5 is connected with the upper clamp through a pulley arranged on the rack, and different tensile loads are applied to the sample through the weights 4 with different weights. The rack, the sample clamping system and the sample heating system are the same as those of a conventional high-temperature creep testing machine, are not shown in the figure and are not described again. The following 5 embodiments are used to describe the technical scheme of the power-off unloading protection system in the present invention:

example 1

As shown in fig. 1, the main structure of the power-off unloading protection system of the present embodiment is a control cylinder 10, an execution cylinder 3, and an adjustment cylinder 1. The control cylinder 10 is used for detecting the power supply state of the high-temperature creep test equipment and acts after power failure. The actuator cylinder 3 is further operated by the operation after the power-off of the control cylinder 10, and the weight 4 in the sample loading system is lifted by the tray 2 to loosen the pull rope 5 and unload the sample. The adjusting cylinder 1 is used for adjusting the height of the tray 2 in an initial state, and is suitable for creep test equipment with different weights 4 or heights. Specifically, the method comprises the following steps:

the cross section of the execution cylinder 3 is circular, and the execution cylinder is vertically distributed and is arranged at the position right below the weight 4 with an opening at the top. The hydraulic agent 11 composed of hydraulic oil or water is contained in the execution cylinder 3, the tray 2 is arranged on the liquid level of the hydraulic agent 11 in the execution cylinder 3 in a floating mode, the upper edge of the tray 2 is in small clearance fit with the bottom of the weight 4, the periphery of the tray 2 is in airtight and small-friction flexible sliding fit with the inner wall of the execution cylinder 3, and therefore the tray 2 is driven to ascend synchronously after the liquid level of the hydraulic agent 11 in the execution cylinder 3 rises, and the weight 4 is lifted to finish unloading.

The cross section of the control cylinder 10 is circular, the control cylinder is vertically distributed and the top of the control cylinder is open, and the same hydraulic agent 11 is filled in the control cylinder 10. The bottom of the control cylinder 10 is connected to the actuator cylinder 3 via a connecting pipe 12, so that the hydraulic fluid 11 can be circulated between the control cylinder 10 and the actuator cylinder 3 by an external pushing action. A piston 8 is arranged at the liquid level position of the hydraulic agent 11 in the control cylinder 10, the outer edge of the piston 8 corresponds to the shape of the inner edge of the control cylinder 10 and is provided with a flexible matching part hermetically matched with the inner edge of the control cylinder 10, so that the hydraulic agent 11 in the actuating cylinder 3 is partially sucked into the control cylinder 10 after the piston 8 is driven to rise by external force, and the liquid level of the hydraulic agent 11 in the actuating cylinder 3 is lowered; after the piston 8 is driven to descend by external force, namely the hydraulic agent 11 in the control cylinder 10 is partially discharged into the execution cylinder 3, the liquid level in the execution cylinder 3 is raised, so as to push the push disc to lift the supporting weight 4.

The external force for driving the hydraulic agent 11 into the actuating cylinder 3 so that the tray 2 supports the weight 4 in this embodiment consists of two parts:

a part of the driving force is the gravity that drives the piston 8 down, which comes from the weight of the weight 7 itself that is fixedly arranged on the piston 8. Because hold up weight 4 through resultant force, so the weight of the balancing weight 7 of this embodiment is less than weight 4, at the fixed rings 6 that are equipped with in 4 tops of weight to through lifting device with piston 8 and balancing weight 7 hoist to the normality when circular telegram again after the outage. In the initial state of this embodiment, the weight 7 and the piston 8 are clamped at the upper position of the control cylinder 10 shown in fig. 1 by a plurality of power-off actuating assemblies 9 distributed along the circumference of the control cylinder 10. After the power is cut off, all power-off clamping action assemblies release the clamping action on the piston 8, the counter weight 7 drives the piston 8 to move downwards under the action of gravity, and the hydraulic agent 11 in the control cylinder 10 is partially discharged into the execution cylinder 3 to push the tray 2 to ascend.

As shown in fig. 2, the power-off actuating member 9 in this embodiment engages with a locking groove 14 provided in the circumferential direction of the piston 8 to lock the piston 8 and the weight member 7 in the initial position shown in fig. 1. The main body of the power-off action component 9 is a clamping shaft 903 which penetrates through a horizontal sliding hole 13 formed in the wall of the control cylinder 10 along the horizontal direction, the inner end (the right end in fig. 2) of the clamping shaft 903 extends into the control cylinder 10 to form a clamping end, and the clamping end is inserted into a clamping groove 14 to form the clamping effect; the outer end (left end in fig. 2) of the snap shaft 903 extends out of the control cylinder 10 and is fixedly provided with a permanent magnet 905, and the permanent magnet 905 is slidably fitted in a cover cylinder 907 fixed on the outer wall of the control cylinder 10 and butted with the horizontal sliding hole 13. An electromagnet 904 is fixedly arranged on the right side of the permanent magnet 905 in the cover cylinder 907, the electromagnet 904 is annular, and a central hole of the electromagnet 904 is penetrated by the clamping shaft 903. The inner coil of the electromagnet 904 is connected with a power supply of the high-temperature creep test equipment, is in a power-on state under a normal state and generates an adsorption permanent magnet 905, and the clamping end is maintained to be matched with the clamping groove 14 so as to clamp the positioning piston 8. The left side that lies in permanent magnet 905 in the cover cylinder 907 is equipped with spring 906, the both ends of spring 906 are fixed and are tensile state with the barrel head of permanent magnet 905 and cover cylinder 907 respectively, outage simultaneously of electro-magnet 904 leads to magnetism to disappear after the outage of high temperature creep equipment, permanent magnet 905 and joint axle 903 move to the left under the pulling force effect of spring 906 promptly, make the joint end deviate from by in the joint groove 14 to relieve the joint effect to piston 8, and then make piston 8 and balancing weight 7 follow vertical gliding under the action of gravity.

Since the electromagnet 904 in this embodiment needs to be kept in a power supply state in a normal state, in order to save energy consumption, the small power consumption electromagnet 904 can be used to suppress the potential energy of the spring 906 for driving the snap-in shaft 903 to rebound. The section of the clamping shaft 903 is rectangular, and the oxygen passing through the horizontal sliding hole 13 is rectangular and slightly larger than the clamping shaft 903. The roller system comprises a small roller 902 which is rotatably arranged on the circumferential surface of the clamping shaft 903 and is in rolling fit with the inner wall of the horizontal sliding hole 13, and a large roller 901 which is rotatably arranged on the clamping end and is in rolling fit with the groove wall of the clamping groove 14. The rims of the small roller 902 and the large roller 901 are made of rubber materials and are respectively in tight contact with the wall of the horizontal sliding hole 13 and the wall of the clamping groove 14 in an initial state.

Another force to drive the tray 2 to float in this embodiment is from atmospheric pressure. As shown in fig. 1, the liquid level of the hydraulic fluid 11 in the control cylinder 10 is higher than that of the actuator cylinder 3 in the initial state, but since the upper part of the control cylinder 10 is closed by the piston 8, the hydraulic fluid 11 at the higher part cannot flow into the actuator cylinder 3 by itself. In order to reasonably utilize the action of atmospheric pressure, communication holes 15 for communicating the inside and outside of the control cylinder 10 are respectively formed on the piston 8 at both sides of the clamping groove 14 as shown in fig. 2. In the initial state where the latch shaft 903 shown in fig. 2 latches the piston 8, the two communication holes 15 are sealed by the upper and lower sides of the large roller 901, respectively, and the initial state is maintained. After the clamping end of the clamping shaft 903 is separated from the clamping groove 14 after power failure, the large roller 901 is separated from the communicating hole 15, the control cylinder 10 is connected with the outside atmosphere through the two communicating holes 15, and the hydraulic agent 11 in the control cylinder 10 is partially and rapidly flushed into the execution cylinder 3 under the action of atmospheric pressure to push the tray 2 to ascend.

The scope of the control cylinder 10 in this embodiment is larger than the actuating cylinder 3, so that once the communicating hole 15 connects the control cylinder 10 with the atmosphere, the hydraulic agent 11 in the control cylinder 10 flows into the actuating cylinder 3 to the balance process, the amount of the hydraulic agent 11 flowing into the actuating cylinder 3 under the unit height condition can be increased, the higher amplitude of the tray 2 is further improved, the specifications of the control cylinder 10 and the actuating cylinder 3 are favorably reduced, and the floor area of this embodiment is reduced.

In summary, once the high temperature creep device is powered off, the spring 906 pulls the clamping shaft 903 outwards to separate the clamping end from the clamping groove 14, the hydraulic agent 11 in the control cylinder 10 is squeezed into the execution cylinder 3 under the action of the weight 7, and is squeezed into the execution cylinder 3 under the action of atmospheric pressure, the two forces are combined to increase the amount of the hydraulic agent 11 in the control cylinder 10, the liquid level rises, and the tray 2 is driven to rise to receive the weight 4.

As also shown in fig. 1, the adjusting cylinder 1 of the present embodiment is disposed on the right side of the lower portion of the actuating cylinder 3. The adjusting cylinders 1 are cylindrical and distributed in the transverse direction. A partition 105 is arranged in a cylinder body 106 of the adjusting cylinder 1 in a sliding mode, a flexible bag 101 communicated with the execution cylinder 3 is arranged in the cylinder body 106 on the left side of the partition 105, the flexible bag 101 is communicated with the execution cylinder 3, the hydraulic agent 11 in the execution cylinder 3 automatically fills the flexible bag 101 under the action of gravity, and the flexible bag 101 is expanded to the whole space of the cylinder body 106 on the left side of the partition 105. The right side of the partition plate 105 is provided with a screw rod 102, the left end of the screw rod 102 is clamped with the partition plate 105 and is in rotating fit, the middle part of the screw rod 102 is in threaded fit with a nut 104 arranged on the end cover of the right end of a cylinder body 106, and the right end of the screw rod extends out of the cylinder body 106 and is connected with a hand wheel 103 as a driving part. When the hand wheel 103 is rotated, the partition 105 can be driven to move along the cylinder body 106 through the matching of the screw 102 and the nut 104, so that the capacity of a volume cavity on the left side of the partition 105 in the cylinder body 106 is changed, the amount of the hydraulic agent 11 in the flexible bag 101 is adjusted, the liquid level height of the hydraulic agent 11 in the execution cylinder 3 and the height of the tray 2 are adjusted, and the device is suitable for high-temperature creep devices with different heights of the weights 4.

Example 2

The main structure of this embodiment is the same as that of embodiment 1, except that the power-off operation component 9 starts to supply power only after power-off, so as to avoid the situation that the electromagnet 904 in embodiment 1 needs to supply power continuously to maintain the clamping state of the clamping shaft 903 with respect to the piston 8 and the counterweight 7 in the normal high-temperature creep test.

As shown in fig. 3, the power-off actuating assembly 9 of this embodiment is also a latch shaft 903, a permanent magnet 905 and an electromagnet 904, and the difference is that the electromagnet 904 is fixed in the cover cylinder 907 and located at the left side position of the permanent magnet, and a spring 906 is sleeved on the latch shaft 903 and located between the permanent magnet 905 and the outer side cylinder wall of the control cylinder 10 and is in a natural extension state to maintain the latch fitting between the latch end and the latch groove 14. The difference is that the power-off action assembly 9 of the present embodiment further includes a power-off sensor, a controller, and a UPS power source. The UPS power supply and the power-off sensor are connected to the controller through signals, a control program is arranged in the controller, the control program is used for connecting the electromagnet 904 to the UPS power supply after the power-off sensor detects the power-off state, and the electromagnet 904 adsorbs the permanent magnet to move left to drive the clamping end of the clamping shaft 903 to be separated from the clamping groove 14. After the clamping end is disengaged from the clamping groove 14, the hydraulic agent 11 in the control cylinder 10 still flows into the execution cylinder 3 under reasonable action to push the tray 2 to rise to support the weight 4 as in embodiment 1.

Example 3

The present embodiment is based on the same concept as embodiment 2, and the power-off action assembly 9 starts to supply power only after power-off, so as to avoid that the electromagnet 904 in embodiment 1 needs to supply power continuously to maintain the clamping state of the clamping shaft 903 with respect to the piston 8 and the counterweight 7 in a normal high-temperature creep test.

As shown in fig. 4, the left end of the clamping shaft 903 in this embodiment is provided with a nut 910, a motor 908 is provided in the cover cylinder 907, an output shaft of the motor 908 is distributed horizontally and provided with a lead screw 909 that is engaged with the nut 910, that is, the clamping shaft 903 is driven to move horizontally by the rotation of the output shaft of the motor 908. Similar to embodiment 2, this embodiment also includes a power-off sensor, a controller and a UPS power supply, and the control program in the controller switches the motor 908 on the UPS power supply after the power-off sensor detects the power-off state, so as to drive the engaging end of the engaging shaft 903 to disengage from the engaging groove 14 by the rotation of the output shaft of the motor 908.

Example 4

The present embodiment differs from embodiment 1 only in the structure of the adjusting cylinder 1. As shown in fig. 5, the adjusting cylinder 1 comprises a cylinder plate 107 slidably arranged in the actuating cylinder 3 and a flexible connection 108 in the form of a sleeve. The cylinder plate 107 is circular, the flexible connection 108 is correspondingly cylindrical, the left end of the flexible connection 108 is sleeved on the periphery of the cylinder plate 107 and is fixed in a sealing mode, and the right end of the flexible connection 108 is fixed on the inner side of the cylinder wall of the actuating cylinder 3, so that a volume cavity which is not the same as the hydraulic agent 11 in the actuating cylinder 3 is defined by the cylinder plate 107, the flexible connection 108 and the corresponding cylinder wall of the actuating cylinder 3. The right side of the cylinder plate 107 is provided with a screw rod 102, the left end of the screw rod 102 is clamped with the cylinder plate 107 and is in running fit with the cylinder plate 107, the middle part of the screw rod 102 is in threaded fit with a nut 104 arranged on the wall of the execution cylinder 3, the right end of the screw rod extends out of the execution cylinder 3 and is provided with a hand wheel 103, namely, the screw rod 102 is driven to rotate through the hand wheel 103, the running fit of the screw rod 102 and the nut 104 pushes the cylinder plate 107 to move horizontally to adjust the volume of the volume cavity, so that the liquid level of the hydraulic fluid 11 in the execution cylinder 3 changes along with the liquid level, and the device is suitable for being matched with high-temperature creep test equipment of weights 4 with different heights.

Example 5

The embodiment is not provided with drawings, and is provided with one control cylinder 10 which is the same as that of the embodiment 1 and a plurality of execution cylinders 3 which are the same as that of the embodiment 1, wherein the execution cylinders 3 are respectively connected with the control cylinders 10 through communication pipes 12, the execution cylinders 3 are respectively arranged under weights 4 of a plurality of high-temperature creep testing machines, so that the liquid level in all the control cylinders 10 is driven to float up through one control cylinder 10 after power failure, and the weights 4 at the corresponding positions are lifted up to complete unloading of corresponding samples, so that the embodiment is particularly suitable for large-scale test mechanisms, and the floor area of an unloading protection system is further powered off through only one control cylinder 10.

Claims (9)

1. The utility model provides a creep test device under high temperature environment, includes frame and sample clamping system, sample heating system and the sample loading system of setting in the frame, sample loading system include weight (4) and connect stay cord (5) on sample clamping system with weight (4), its characterized in that: the power-off unloading protection system is provided with a control cylinder (10), an execution cylinder (3) and an adjusting cylinder (1), the control cylinder (10) and the execution cylinder (3) are vertically distributed and are arranged with an opening in the top, the control cylinder (10) and the execution cylinder (3) are communicated with each other and respectively contain hydraulic agents (11), a piston (8) is arranged in the control cylinder (10), a balancing weight (7) is arranged at the top of the piston (8), an annular clamping groove (14) is formed in the peripheral portion of the piston (8), the clamping groove (14) is matched with a power-off action assembly (9) arranged on the control cylinder (10), the power-off action assembly (9) is used for transversely clamping the limiting piston (8) in the power-on state, and the limiting of the piston (8) is released after power-off so that the piston (8) slides downwards under the action of the balancing weight (7); the execution cylinder (3) is internally provided with a tray (2), and the tray (2) is used for bearing the weight (4) after being pushed and lifted by the hydraulic agent (11) in the execution cylinder (3) so as to unload the sample; the adjusting cylinder (1) is provided with an adjusting component for adjusting the change of the volume cavity of the adjusting cylinder (1), and the volume cavity of the adjusting cylinder (1) interacts with a hydraulic agent (11) in the control cylinder (10) or the execution cylinder (3) through the change of the volume of the adjusting cylinder to adjust the height of the tray (2).

2. The creep test apparatus in a high temperature environment according to claim 1, wherein: the adjusting cylinder (1) is arranged at the position of one side of the lower part of the executing cylinder (3), a partition plate (105) is arranged in a cylinder body (106) of the adjusting cylinder (1) in a sliding manner, and a flexible bag (101) communicated with the executing cylinder (3) is arranged in the cylinder body (106) at one side of the partition plate (105); the adjusting component is a screw rod (102) which is in threaded fit with the cylinder wall of the cylinder body (106), one end of the screw rod (102) extends into the cylinder body (106) and is in running fit with a shaft seat arranged on the partition plate (105), and the other end of the screw rod (102) is positioned outside the cylinder body (106) and is provided with a driving piece.

3. The creep test apparatus in a high temperature environment according to claim 1, wherein: the adjusting cylinder (1) comprises a cylinder plate (107) arranged in the execution cylinder (3) in a sliding mode and a sleeve-shaped flexible connection (108), one end of the flexible connection (108) is in butt joint with the cylinder plate (107) along the circumferential direction of the cylinder plate (107), the other end of the flexible connection (108) is fixed to the inner side of the cylinder wall of the execution cylinder (3), and a volume cavity is enclosed by the cylinder plate (107), the flexible connection (108) and the corresponding cylinder wall of the execution cylinder (3); the adjusting component is a screw rod (102) which is in threaded fit with the wall of the execution cylinder (3), one end of the screw rod (102) extends into the execution cylinder (3) and is in running fit with the cylinder plate (107), and the other end of the screw rod is positioned outside the execution cylinder (3) and is provided with a driving piece.

4. The creep test apparatus in a high temperature environment according to claim 1, wherein: the creep testing device comprises a control cylinder (10) and a plurality of execution cylinders (3), wherein the adjusting cylinder (1) is connected with the control cylinder (10), and the execution cylinders (3) are respectively and correspondingly arranged below weights (4) of different creep testing devices.

5. The creep test apparatus in a high temperature environment according to claim 1, wherein: outage action subassembly (9) are including joint axle (903), spring (906) and electro-magnet (904), joint axle (903) sliding fit installs in horizontal slide opening (13) of seting up in the jar wall of control jar (10), the inner of joint axle (903) stretches into in control jar (10) and forms the joint end with joint groove (14) complex, the outer end of joint axle (903) is equipped with permanent magnet (905), electro-magnet (904) are used for adsorbing permanent magnet (905) and maintaining the joint state of joint end and joint groove (14) under the circular telegram state, spring (906) are compression state and are used for pushing joint axle (903) outward movement after electro-magnet (904) cut off the power supply so that the joint end breaks away from joint groove (14).

6. The creep test apparatus in a high temperature environment according to claim 1, wherein: outage action subassembly (9) are including joint axle (903), controller and drive element, joint axle (903) sliding fit installs in horizontal slide opening (13) of seting up in the jar wall of control jar (10), the inner of joint axle (903) stretches into in control jar (10) and forms the joint end with joint groove (14) complex, controller signal connection has outage sensor and the UPS power supply who is used for detecting creep test device power supply state, the built-in control program that has in the controller, control program is used for putting through drive element UPS power supply after outage sensor detects outage state, break away from joint groove (14) with the joint end of drive joint axle (903).

7. The creep test apparatus in a high temperature environment according to claim 6, wherein: the driving element is an electromagnet (904) or a motor (908).

8. The creep test apparatus in any one of high temperature environments according to claims 5 to 7, wherein: the clamping shaft (903) is provided with a roller which is in rolling fit with the horizontal sliding hole (13) or the clamping groove (14).

9. The creep test apparatus in a high temperature environment according to claim 8, wherein: the liquid level of the hydraulic agent (11) in the execution cylinder (3) is lower than that of the hydraulic agent (11) in the control cylinder (10); both sides of the clamping groove (14) are respectively provided with a communicating hole (15) used for communicating the inside and the outside of the control cylinder (10), and the communicating hole (15) is blocked by a roller positioned in the clamping groove (14).

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