Checking instrument for gas density relay

Abstract

The invention provides a calibrator for a gas density relay, the calibrator comprises a shell and a calibrator body arranged in the shell, and at least one gas storage component is arranged in the calibrator body. The calibration instrument further comprises a buffer device, the buffer device is arranged between the outer peripheral side of the calibration instrument body and the inner peripheral side of the shell, the buffer device comprises a plurality of buffer assemblies, and the plurality of buffer assemblies are arranged at intervals in the circumferential direction of the calibration instrument body. Wherein a first gap is formed between the outer peripheral side of the calibrator body and the inner peripheral side of the shell, and each buffer assembly is located in the first gap and can stretch out and draw back in the width direction of the first gap at the position where the buffer assembly is located. When the shell shakes, the buffer device can absorb part of vibration transmitted to the calibrator body, so that the stability of the calibrator body in the horizontal direction is ensured, and the risk of gas leakage caused by collision between the gas storage component and the calibrator body under vibration is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of calibration tools, and in particular to a calibrator for a gas density relay. Background Art

[0002] SF6 (sulfurized fluorine gas) density relay is a device used to monitor the density of SF6 gas in high-voltage switchgear to ensure the normal operation and safety of the equipment. The function of SF6 gas density relay is to monitor the density of SF6 gas and issue an alarm or trigger a protective action when the density exceeds the set range to prevent overload or failure of the equipment. It has good insulation performance and thermal conductivity, can effectively isolate and extinguish arcs, and ensure the safe operation of the equipment.

[0003] In order to ensure the reliability of the gas density relay, there is a calibrator in the prior art that is specifically used to calibrate the performance of various SF6 gas density relays. This calibrator can perform standard conversion on the pressure of SF6 gas at any ambient temperature.

[0004] For example, a Chinese patent (publication number CN212180999U) discloses a SF6 gas density relay tester with a recovery device, which includes a body, an air outlet and a box body 1. A pressure gauge is embedded in the middle of one side of the upper end of the body, a signal port is provided on one side of the pressure gauge, a detection port is provided on the side of the signal port away from the pressure gauge, an air inlet is provided on the side of the pressure gauge away from the signal port, and the air outlet is provided on the side of the air inlet away from the pressure gauge. A joint is provided in the air outlet, and a connecting pipe 1 is provided on the upper end of the joint. This tester is designed with a vacuum pump, connecting pipe 2 and connecting pipe 3, so that after the equipment completes the inspection of the gas density relay, the gas in connecting pipe 1, box body 1, box body 2 and connecting pipe 2 can be actively extracted through the vacuum pump.

[0005] However, when calibrating SF6 density relays on the market, the three-channel SF6 density relay calibrators (such as the above-mentioned SF6 gas density relay calibrator with recovery device) used during calibration require staff to install connecting pipes between the relay and the calibrator respectively. When calibrating some relays installed in remote locations or in small spaces, collisions when moving the calibrator can easily cause damage to the gas tank inside the machine body, resulting in leakage of SF6 (fluorine sulfide gas).

[0006] Therefore, the calibrator used for gas density relay in the prior art has a technical problem that the gas tank inside the calibrator is easily damaged when the calibrator collides during movement, thereby causing SF6 (sulfurized fluorine gas) leakage. Summary of the invention

[0007] The purpose of the present invention is to solve the technical problem that the calibrator for gas density relay in the prior art is easy to cause damage to the gas tank inside the body when the calibrator collides during movement, thus causing SF6 (sulfurized fluorine gas) leakage.

[0008] To solve the above technical problems, an embodiment of the present invention discloses a calibrator for a gas density relay. The calibrator comprises a housing and a calibrator body disposed in the housing. At least one gas storage component is disposed in the calibrator body.

[0009] The calibrator also includes a buffer device, which is arranged between the outer circumference of the calibrator body and the inner circumference of the shell. The buffer device includes a plurality of buffer components, which are arranged at intervals along the circumference of the calibrator body.

[0010] A first gap is formed between the outer peripheral side of the calibrator body and the inner peripheral side of the shell, and a second gap is formed between the bottom surface of the calibrator body and the corresponding surface of the shell. Each buffer component is located in the first gap and can be extended and retracted along the width direction of the first gap at its position, wherein the width direction of the first gap is perpendicular to the thickness direction of the calibrator body.

[0011] By adopting the above technical solution, the calibrator for gas density relay is provided with a buffer device between the calibrator body and the shell. When the shell shakes, the buffer device can absorb part of the vibration transmitted to the calibrator body, ensuring the stability of the calibrator body in the horizontal direction. Specifically, a first gap is formed between the outer peripheral side of the calibrator body and the inner peripheral side of the shell. Each buffer component is located in the first gap and can be extended and retracted along the width direction of the first gap at its position. When the calibrator tilts relative to the horizontal direction, the buffer component close to the tilted side is extended along the width direction of the first gap, and the buffer component away from the tilted side is shortened along the width direction of the first gap, thereby hindering the tendency of the calibrator body to tilt, avoiding the collision between the outer peripheral side of the calibrator body and the inner peripheral side of the shell, and ensuring the stability of the calibrator body in the horizontal direction. Furthermore, a second gap is also formed between the bottom surface of the calibrator body and the corresponding surface of the shell, which can prevent the vibration of the shell from being directly transmitted to the calibrator body, further improving the stability of the calibrator body, and reducing the risk of gas leakage caused by the collision of the gas storage component with the calibrator body under vibration.

[0012] An embodiment of the present invention also discloses a calibrator for a gas density relay, wherein the outer periphery of the calibrator body is located at four corners and mounting recesses are formed on the side walls along its width direction, and a corresponding buffer assembly is arranged in each mounting recess, and the buffer assembly includes a first buffer member and a second buffer member arranged at intervals in the mounting recess.

[0013] By adopting the above technical solution, installation recesses are set at the four corners of the calibrator body to provide an installation position for the buffer assembly, and a first buffer member and a second buffer member are arranged in the installation recess to work together to absorb the vibration of the shell and transmit it to the calibrator body, thereby improving the stability of the calibrator body when moving.

[0014] An embodiment of the present invention also discloses a calibrator for a gas density relay, wherein the first buffer member includes a buffer spring, each buffer spring extends along the width direction of the first gap at its position, and one end of each buffer spring is connected to the corresponding mounting recess, and the other end is connected to the inner wall of the shell.

[0015] By adopting the above technical solution, the buffer spring arranged in the mounting recess can reduce the frequency of the vibration of the housing when it is transmitted to the calibrator body. Moreover, when the housing is tilted relative to the horizontal direction, the buffer spring close to the tilted side is further compressed, and the compressed buffer spring applies thrust to the calibrator body, while the buffer spring away from the tilted side is stretched, and the stretched buffer spring applies elastic force to the calibrator body, thereby reducing the tilt amplitude of the calibrator body under the action of the buffer springs on both sides, and reducing the possibility of collision between the gas storage component in the calibrator body and the calibrator body.

[0016] An embodiment of the present invention also discloses a calibrator for a gas density relay, wherein the second buffer member includes a hydraulic rod, each of which has a cavity filled with liquid formed inside, the hydraulic rod having a fixed end and a telescopic end capable of moving along its axial direction, the fixed end of the hydraulic rod being connected to a corresponding mounting recess, and the telescopic end being abutted against a positioning groove on the inner wall of the shell.

[0017] By adopting the above technical solution, the hydraulic rod arranged in the installation recess can reduce the amplitude of the vibration of the housing when it is transmitted to the calibration instrument body due to the damping force of the hydraulic rod itself. In addition, the positioning groove arranged on the inner side wall of the housing can provide a positioning function for the installation of the telescopic end of the hydraulic rod.

[0018] The embodiment of the present invention further discloses a calibrator for a gas density relay, wherein an annular hydraulic cavity surrounding the outer peripheral side of the calibrator body is formed in the calibrator body.

[0019] Furthermore, the annular hydraulic chamber is located at the positions of the four mounting recesses, and a branch is formed to communicate with the cavities of the corresponding hydraulic rods, so that the liquids in the cavities of the four hydraulic rods can flow.

[0020] By adopting the above technical scheme, when the shell is tilted relative to the horizontal direction, the liquid in the annular hydraulic cavity flows to the cavity of the hydraulic rod close to the tilted side under the action of inertia, increasing the damping force in the hydraulic rod, while the liquid in the cavity of the hydraulic rod away from the tilted side is reduced, and the damping force in the hydraulic rod is reduced. Therefore, under the action of the hydraulic rods on both sides, the tilt amplitude of the calibrator body is reduced, reducing the possibility of collision between the air storage component in the calibrator body and the calibrator body.

[0021] The embodiment of the present invention further discloses a tester for a gas density relay, wherein an opening is formed on a side wall of a housing, and a gas storage component has a gas pipeline extending from the opening out of the housing and extending to the outside of the housing.

[0022] A receiving component is arranged outside the shell, and at least a part of the gas pipeline is received in the receiving component.

[0023] By adopting the above technical solution, the gas pipeline of the gas storage component extends out of the shell through the opening of the shell, so as to facilitate the connection of the gas density relay during calibration. The storage component outside the shell can be set to store the gas pipeline. On the one hand, the gas pipeline stored in the storage component can reduce the possibility of being damaged by other components due to exposure to the outside, thereby reducing the risk of gas leakage in the gas pipeline; on the other hand, it reduces the possibility of entanglement and knotting of the gas pipeline exposed outside the shell, making it more convenient to connect the gas pipeline to the gas density relay.

[0024] An embodiment of the present invention also discloses a calibrator for a gas density relay, wherein the storage component includes a storage box, and a roller and a driving member arranged in the storage box, wherein the storage box is fixedly assembled with the shell, the roller is rotatably assembled on the calibrator body, and the driving member is transmission-connected with the roller.

[0025] The gas pipeline of the gas storage member extends from the opening to the outside of the shell, and the part extending to the outside of the shell is wound on the roller. In addition, the end of the gas pipeline extends to the outside of the storage box to form a joint.

[0026] By adopting the above technical solution, the gas pipeline is wound on the drum. When the joint of the gas pipeline needs to be connected to the gas density relay, the driving member drives the drum to rotate in the opposite direction of the winding direction, so that the gas pipeline wound on the drum is output outside the storage box; after completing the calibration of the gas density relay, the gas pipeline needs to be stored and recovered in the storage component, and the driving member drives the drum to rotate in the winding direction, and the gas pipeline is wound on the drum. This structure makes the winding and output of the gas pipeline more convenient.

[0027] The embodiment of the present invention further discloses a tester for a gas density relay, wherein the storage component further comprises a movable rod on which the roller is sleeved, and a transmission rod arranged between the movable rod and the driving member.

[0028] The movable rod is rotatably arranged on the calibration instrument body through at least two supporting frames, one end of the transmission rod is transmission connected to the driving member, and the other end is transmission connected to the movable rod.

[0029] With the above technical solution, the power of the driving member is transmitted to the movable rod through the transmission rod, and the movable rod drives the roller sleeved on the outside to rotate, thereby realizing the storage and output of the gas pipeline. The support frame arranged on the calibration instrument body supports the movable rod.

[0030] An embodiment of the present invention also discloses a calibrator for a gas density relay, wherein the gas pipeline of each gas storage component has an air inlet pipeline and an air outlet pipeline, and the air inlet pipeline and the air outlet pipeline extend from both sides of the shell in the length direction to the outside of the shell respectively, and storage components corresponding to the air inlet pipeline and the air outlet pipeline are formed on both sides of the shell in the length direction.

[0031] By adopting the above technical solution, the storage components arranged on both sides of the shell in the length direction can respectively store and protect the air inlet pipeline and the air outlet pipeline of the air storage component.

[0032] The embodiment of the present invention also discloses a calibrator for a gas density relay, wherein a control element is integrated in a gas storage component, and a first valve assembly is arranged between the gas storage component and the gas inlet pipeline, and a second valve assembly is arranged between the gas storage component and the gas outlet pipeline.

[0033] By adopting the above technical solution, the control element can realize the function of inflating and deflating the gas density relay by controlling the first valve component between the gas storage component and the air inlet pipeline, and the second valve component between the gas storage component and the air outlet pipeline.

[0034] The beneficial effects of the present invention are:

[0035] The present invention provides a calibrator for a gas density relay, the calibrator comprising a shell and a calibrator body arranged in the shell, at least one gas storage member is arranged in the calibrator body. The calibrator also comprises a buffer device, the buffer device is arranged between the outer peripheral side of the calibrator body and the inner peripheral side of the shell, the buffer device comprises a plurality of buffer components, and the plurality of buffer components are arranged at intervals along the circumference of the calibrator body. A first gap is formed between the outer peripheral side of the calibrator body and the inner peripheral side of the shell, each buffer component is located in the first gap, and can be extended and retracted along the width direction of the first gap at its position. When the shell shakes, the buffer device can absorb part of the vibration transmitted to the calibrator body, ensure the stability of the calibrator body in the horizontal direction, and reduce the risk of gas leakage caused by the collision of the gas storage member with the calibrator body under vibration.

[0036] In addition, an opening is formed on the side wall of the shell, and the gas storage component has a gas pipeline extending from the opening out of the shell and extending to the outside of the shell. A storage component is arranged outside the shell, and the gas pipeline is at least partially accommodated in the storage component. On the one hand, the gas pipeline accommodated in the storage component can reduce the possibility of being damaged by other components due to exposure to the outside, thereby reducing the risk of gas leakage in the gas pipeline; on the other hand, the possibility of the gas pipeline exposed outside the shell getting entangled and knotted is reduced, making the gas pipeline more convenient when connecting the gas density relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the structure of a calibration instrument for a gas density relay provided in an embodiment of the present invention;

[0038] Figure 2 An exploded schematic diagram of a calibration instrument for a gas density relay provided in an embodiment of the present invention with a storage component removed;

[0039] Figure 3 A schematic structural diagram of an upper half shell of a calibration instrument for a gas density relay provided in an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the assembly of a lower half shell, a calibrator body and a gas storage member of a calibrator for a gas density relay provided in an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of the assembly of a calibrator body and a gas storage component of a calibrator for a gas density relay provided in an embodiment of the present invention;

[0042] Figure 6 A schematic structural diagram of a calibrator body of a calibrator for a gas density relay provided in an embodiment of the present invention;

[0043] Figure 7 A schematic structural diagram of a gas storage component of a calibration instrument for a gas density relay provided in an embodiment of the present invention;

[0044] Figure 8 An exploded schematic diagram of a storage component of a calibration instrument for a gas density relay provided in an embodiment of the present invention;

[0045] Fig. 9 A schematic diagram of the assembly of a roller and a driving member of a calibrator for a gas density relay provided in an embodiment of the present invention.

[0046] Description of reference numerals:

[0047] 10. Calibrator;

[0048] 100. Shell;

[0049] 110, upper half shell; 111, operating part; 112, display part; 113, connecting part; 114, heat dissipation part; 120, lower half shell;

[0050] 101. Open your mouth;

[0051] 200, calibrator body;

[0052] 210, mounting recess; 220, mounting groove; 230, clamp;

[0053] 300. Gas storage component;

[0054] 310, air inlet pipeline; 320, air outlet pipeline; 330, control element;

[0055] 340, a first valve assembly; 350, a second valve assembly;

[0056] 301. Gas pipeline; 302. Connector;

[0057] 400, buffer device;

[0058] 410, buffer assembly; 411, first buffer member; 412, second buffer member;

[0059] 413, buffer spring; 414, hydraulic rod;

[0060] 500, storage component;

[0061] 510, storage box; 520, roller; 530, driving member;

[0062] 540, movable rod; 550, transmission rod; 560, supporting frame;

[0063] Z, thickness direction; X, width direction; Y, length direction. DETAILED DESCRIPTION

[0064] Gas density relays are key components used to monitor and protect equipment in power systems, especially in closed gas-insulated systems (such as GIS, transformers, etc.). It can monitor the density changes of internal gases, and when gas leaks or the density drops to unsafe levels, it will promptly issue an alarm or control signal to prevent equipment failure or damage. Therefore, calibrating the accuracy and reliability of gas density relays is crucial to ensuring equipment safety. Gas density relays that have not been calibrated for a long time may have errors or failures, resulting in false alarms or missed alarms. False alarms may cause unnecessary downtime or maintenance, affecting power supply; missed alarms may cause equipment to operate in a dangerous state, increasing the risk of accidents. Therefore, the power safety regulations of many countries and regions require regular calibration of gas density relays to ensure that their performance meets the standards. Calibration is an important means to ensure that equipment complies with these safety regulations.

[0065] The calibration method of gas density relay mainly includes the following aspects:

[0066] Initial value verification: Under the condition of constant pressure and temperature, check whether the initial value measured by the gas density relay meets the requirements. If there is a difference, the relay needs to be readjusted.

[0067] Sensitivity check: Check the relay's response to density changes by changing the ambient temperature or air pressure, and observe whether the relay can send out an alarm signal in time. If the sensitivity is not up to standard, the relay needs to be adjusted or replaced.

[0068] Action time check: Check whether the relay action time meets the requirements, that is, whether the relay can send out a signal in time when the gas density reaches a certain value. If the action time is too long or too short, the relay needs to be adjusted or replaced.

[0069] Mechanical strength check: Check whether the internal mechanical parts of the relay are normal and have sufficient durability and reliability. If necessary, repair or replace the parts on the relay.

[0070] The principle of continuing to calibrate the gas density relay is: based on the principle that the pressure of the gas sealed in the container changes with temperature, the measured pressure is converted into an equivalent pressure value at 20°C for comparison. During the calibration process, the SF6 density relay is inflated or deflated slowly and evenly, and the pressure value at the ambient temperature at that time is recorded and converted to obtain the lockout recovery value or overpressure recovery value of the SF6 density relay.

[0071] When calibrating the SF6 density relay, you need to disconnect the control power of the relay first, and then connect the test cable. Then, according to the specific needs of the calibration (such as calibrating the SF6 density relay of the alarm, lockout, overpressure signal, etc.), perform the corresponding settings and operations. Finally, enter the calibration interface through the calibrator, enter the number of the density relay to be calibrated and the current temperature and other information, and perform the calibration. However, during the calibration process, the staff is required to install the connecting pipe between the relay and the calibrator respectively. When calibrating some relays installed in a remote location or a small space, collisions when moving the calibrator can easily damage the gas tank inside the machine body, resulting in SF6 (sulfide fluorine gas) leakage.

[0072] Therefore, the present invention provides a calibrator for a gas density relay, comprising a shell and a calibrator body arranged in the shell, a gas storage component is arranged in the calibrator body, the gas storage component is used to store gas, in order to prevent the gas storage component from colliding with the calibrator body and being damaged during vibration, a buffer device is arranged between the calibrator body and the shell, the buffer device comprises a plurality of buffer components, and the plurality of buffer components are arranged at intervals along the circumference of the calibrator body, so as to absorb part of the vibration transmitted to the calibrator body by the shell, ensure the stability of the calibrator body in the horizontal direction, and reduce the risk of gas leakage caused by the collision of the gas storage component with the calibrator body under vibration.

[0073] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0074] like Figures 1 to 5 As shown, an embodiment of the present invention provides a calibrator 10 for a gas density relay, the calibrator 10 comprises a housing 100 and a calibrator body 200 disposed in the housing 100, and at least one gas storage member 300 is disposed in the calibrator body 200. It should be noted that one, two, three or other number of gas storage members 300 may be disposed in the calibrator body 200, and each gas storage member 300 may be used to calibrate the gas density relay independently. Figure 2 In this embodiment, three gas storage components 300 are provided in the calibration instrument body 200. For the convenience of description, the structure of the calibration instrument 10 is described below by taking the arrangement of three gas storage components 300 as an example.

[0075] The calibrator 10 further includes a buffer device 400 , which is disposed between the outer circumference of the calibrator body 200 and the inner circumference of the shell 100 . The buffer device 400 includes a plurality of buffer components 410 , which are spaced apart along the circumference of the calibrator body 200 .

[0076] A first gap is formed between the outer circumference of the calibrator body 200 and the inner circumference of the shell 100, and a second gap is formed between the bottom surface of the calibrator body 200 and the corresponding surface of the shell 100. Each buffer assembly 410 is located in the first gap and can be extended and retracted along the width direction of the first gap at its position, wherein the width direction of the first gap is perpendicular to the thickness direction Z of the calibrator body 200. The width of the first gap ranges from 5 mm to 20 mm, and can be 5 mm, 6 mm, 10.5 mm, 16 mm, 19.5 mm or other widths within the above range, and the width of the second gap ranges from 5 mm to 10 mm, and can be 5 mm, 7.5 mm, 8 mm, 10 mm or other widths within the above range, and the embodiments of the present invention do not specifically limit this.

[0077] It should be noted that if Figure 2 As shown, in this embodiment, the shell 100 includes an upper half shell 110 and a lower half shell 120 spliced ​​together, and a plurality of buckles (not shown in the figure) are arranged on the assembly surface between the upper half shell 110 and the lower half shell 120. The upper half shell 110 and the lower half shell 120 can be connected by the buckles. Of course, the upper half shell 110 and the lower half shell 120 can also be fixedly connected by screwing or gluing, etc., and the embodiments of the present invention do not specifically limit this.

[0078] More specifically, the housing 100 may be a rectangular parallelepiped structure formed by splicing an upper half shell 110 and a lower half shell 120. Figure 1 As shown, the thickness direction of the housing 100 is as follows Figure 1 The direction indicated by Z in FIG. 1 is the length direction of the housing 100. Figure 1 The direction indicated by Y in FIG. 1 is the width direction of the housing 100. Figure 1 The direction indicated by X.

[0079] And, if Figure 2 , Figure 7 as well as Figure 8 As shown, the three gas storage components 300 in the calibrator body 200 all have a gas pipeline 301 extending from the shell 100 from the opening 101 and extending to the outside of the shell 100, and the gas density relay is connected through the gas pipeline 301. Furthermore, the gas pipeline 301 of each gas storage component 300 has an air inlet pipeline 310 and an air outlet pipeline 320, and the air inlet pipeline 310 and the air outlet pipeline 320 extend from both sides of the length direction Y of the shell 100 to the outside of the shell 100 respectively. Therefore, openings 101 are formed on the side walls on both sides of the length direction Y of the shell 100, so that the air inlet pipeline 310 and the air outlet pipeline 320 of the gas storage component 300 can extend out of the shell 100 from the corresponding openings 101 respectively.

[0080] Furthermore, if Figure 7As shown, a control element 330 is integrated in the gas storage component 300, and a first valve assembly 340 is arranged between the gas storage component 300 and the air inlet pipeline 310, and a second valve assembly 350 is arranged between the gas storage component 300 and the air outlet pipeline 320. The control element 330 can realize the function of inflating and deflating the gas density relay of the gas storage component 300 by controlling the first valve assembly 340 between the gas storage component 300 and the air inlet pipeline 310, and the second valve assembly 350 between the gas storage component 300 and the air outlet pipeline 320.

[0081] It should be noted that if Figure 2 As shown, when the housing 100 is composed of an upper half shell 110 and a lower half shell 120 , the opening 101 on the housing 100 is formed by combining the openings 101 of the upper half shell 110 and the lower half shell 120 .

[0082] The upper half shell 110 and the structure disposed thereon will be described below.

[0083] like Figure 3 As shown, an operation unit 111 and a display unit 112 are formed on the upper surface of the upper half shell 110 along the thickness direction Z, and a connection unit 113 is formed on the outer wall of the upper half shell 110, wherein the operator adjusts the experimental parameters of the calibrator 10 through the operation unit 111, and the display unit 112 is convenient for the operator to read data, and the connection unit 113 of the outer wall is used for electrical connection with other devices. The operation unit 111 can be a keyboard, touch panel or other structure commonly used in the art, the display unit 112 can be a display panel or other display panel commonly used in the art, and the connection unit 113 can be a plurality of connection plugs commonly used in the art, and the embodiments of the present invention do not specifically limit this.

[0084] More specifically, the display unit 112 is hinged to the surface of the upper half shell 110 in the thickness direction Z. When in use, the display unit 112 can be unfolded. When not in use, the display unit 112 can be covered on the surface of the operating unit 111, similar to the structure of a notebook computer, so that it is easy to carry. It should be noted that a guide block (not shown in the figure) is also provided between the display unit 112 and the upper half shell 110 to guide the rotation of the display unit 112, and the embodiment of the present invention does not specifically limit this.

[0085] Furthermore, if Figure 3 As shown, the outer wall of the upper half shell 110, located near the connecting portion 113, is formed with a heat dissipation portion 114, which is used to discharge the heat generated by the electrical components in the calibrator 10 when they are working. Specifically, the heat dissipation portion 114 can be configured as a plurality of strip holes penetrating the side wall of the upper half shell 110. Of course, the heat dissipation portion 114 can also be a honeycomb structure composed of a plurality of heat dissipation holes, which is not specifically limited in the embodiment of the present invention.

[0086] The structure of the lower half shell 120 will be described below.

[0087] like Figure 4 and Figure 5 As shown, a recess for placing the calibrator body 200 is formed in the lower half shell 120, and the buffer device 400 is arranged between the calibrator body 200 and the lower half shell 120, and there is a gap between the calibrator body 200 and the inner side wall of the lower half shell 120. In addition, anti-slip pads (not shown in the figure) are formed at the bottom of the lower half shell 120 and at the four corners to improve the stability of the lower half shell 120 when it is placed.

[0088] The calibrator 10 for gas density relays is provided with a buffer device 400 between the calibrator body 200 and the shell 100. When the shell 100 shakes, the buffer device 400 can absorb part of the vibration transmitted to the calibrator body 200, thereby ensuring the stability of the calibrator body 200 in the horizontal direction. Specifically, a first gap is formed between the outer peripheral side of the calibrator body 200 and the inner peripheral side of the shell 100. Each buffer component 410 is located in the first gap and can be extended and retracted along the width direction of the first gap at its position. When the calibrator 10 tilts relative to the horizontal direction, the buffer component 410 close to the tilted side is extended along the width direction of the first gap, and the buffer component 410 away from the tilted side is shortened along the width direction of the first gap, thereby hindering the tendency of the calibrator body 200 to tilt, avoiding collision between the outer peripheral side of the calibrator body 200 and the inner peripheral side of the shell 100, and ensuring the stability of the calibrator body 200 in the horizontal direction. Furthermore, a second gap is also formed between the bottom surface of the calibrator body 200 and the corresponding surface of the shell 100, which can prevent the vibration of the shell 100 from being directly transmitted to the calibrator body 200, further improve the stability of the calibrator body 200, and reduce the risk of gas leakage caused by the gas storage component 300 colliding with the calibrator body 200 under vibration.

[0089] The structure of the calibrator body 200 is described below.

[0090] like Figures 4 to 6 As shown, mounting recesses 210 are formed on the four corners of the outer periphery of the calibrator body 200 and on the side walls along the width direction X thereof, and a corresponding buffer assembly 410 is disposed in each mounting recess 210 .

[0091] It should be noted that the installation recesses 210 are not limited to the four corners and the side walls along the width direction X in the above embodiment. The installation recesses 210 can also be arranged at intervals of three on the side walls of the calibrator body 200 along the length direction Y, and the installation recesses 210 can be arranged on the side walls along the width direction X and on both sides of the opening 101. The installation recesses 210 can also be formed at the four corners of the calibrator body 200, and each installation recess 210 is provided with a buffer assembly 410. The embodiments of the present invention do not specifically limit this.

[0092] like Figure 5 and Figure 6 As shown, three mounting grooves 220 corresponding to the gas storage member 300 are formed in the calibration instrument body 200, each mounting groove 220 is adapted to the shape of the gas storage member 300, and a plurality of clips 230 are arranged at circumferential intervals in the mounting grooves 220, for example Figure 6 As shown, two clips 230 are arranged on the side walls of each mounting groove 220 along the width direction X of the housing 100, and the gas storage member 300 is arranged in the mounting groove 220 and fixed by the clips 230. In this way, the gas storage member 300 is installed in the calibration instrument body 200, which has the advantage of convenient disassembly and assembly. It should be noted that in order to facilitate the identification of the drawing, Figure 6 In the figure, only the clips 230 at the edges of the mounting groove 220 on both sides of the length direction Y are numbered.

[0093] Of course, the installation method of the gas storage member 300 and the calibration instrument body 200 is not limited to the method in the above embodiment. In another alternative embodiment, a buffer adhesive sticker is provided at the bottom of the installation groove 220 and at the four corners, and the gas storage member 300 is fixed in the installation groove 220 by the buffer adhesive sticker. In short, the embodiments of the present invention do not make specific limitations on this.

[0094] The specific structure of the buffer device 400 is described below.

[0095] like Figures 4 to 6 As shown, the buffer assembly 410 includes a first buffer member 411 and a second buffer member 412 spaced apart in the mounting recess 210 .

[0096] In one embodiment, the first buffer member 411 includes buffer springs 413, each buffer spring 413 extends along the width direction of the first gap at its position, and one end of each buffer spring 413 is connected to the corresponding mounting recess 210, and the other end is connected to the inner wall of the shell 100.

[0097] Among them, the buffer spring 413 arranged in the mounting recess 210 can reduce the frequency of the vibration of the housing 100 when it is transmitted to the calibrator body 200. In addition, when the housing 100 is tilted relative to the horizontal direction, the buffer spring 413 close to the tilted side is further compressed, and the compressed buffer spring 413 applies a thrust to the calibrator body 200, while the buffer spring 413 away from the tilted side is stretched, and the stretched buffer spring 413 applies an elastic force to the calibrator body 200, so that under the action of the buffer springs 413 on both sides, the tilt amplitude of the calibrator body 200 is reduced, and the possibility of collision between the gas storage member 300 in the calibrator body 200 and the calibrator body 200 is reduced.

[0098] like Figure 5 and Figure 6 As shown, in one embodiment, the second buffer member 412 includes a hydraulic rod 414, each of which has a cavity filled with liquid formed therein, and the hydraulic rod 414 has a fixed end and a telescopic end that can move along its axial direction, the fixed end of the hydraulic rod 414 is connected to the corresponding mounting recess 210, and the telescopic end abuts against a positioning groove (not shown in the figure) on the inner side wall of the housing 100. It should be noted that in order to facilitate the fixing of the telescopic end and the positioning groove, a positioning block (not shown in the figure) that matches the positioning groove can be provided at the end of the telescopic end.

[0099] Furthermore, in the present embodiment, an annular hydraulic chamber (not shown in the figure) surrounding the outer circumference of the calibrator body 200 is formed in the calibrator body 200 .

[0100] In addition, the annular hydraulic chamber is located at the positions of the four mounting recesses 210, and a branch is formed to connect the cavities of the corresponding hydraulic rods 414, so that the liquid in the cavities of the four hydraulic rods 414 can flow. When the housing 100 is tilted relative to the horizontal direction, the liquid in the annular hydraulic chamber flows to the cavity of the hydraulic rod 414 close to the tilted side under the action of inertia, thereby increasing the damping force in the hydraulic rod 414, while the liquid in the cavity of the hydraulic rod 414 away from the tilted side is reduced, and the damping force in the hydraulic rod 414 is reduced. Therefore, under the action of the hydraulic rods 414 on both sides, the tilt amplitude of the calibrator body 200 is reduced, thereby reducing the possibility of collision between the air storage component 300 in the calibrator body 200 and the calibrator body 200.

[0101] Therefore, by cooperating with each other, the buffer springs 413 and the hydraulic rod 414 arranged at the four corners of the calibrator body 200, the buffer springs 413 reduce the frequency of the vibration of the shell 100 when it is transmitted to the calibrator body 200, and the hydraulic rod 414 reduces the amplitude of the vibration of the shell 100 when it is transmitted to the calibrator body 200, thereby greatly reducing the vibration transmitted to the calibrator body 200, and when tilting occurs, reducing the amplitude of the tilt of the calibrator body 200, reducing the possibility of collision between the gas storage component 300 in the calibrator body 200 and the calibrator body 200, and providing a stable working environment for the gas storage component 300 in the calibrator body 200.

[0102] Of course, the structure of the buffer assembly 410 is not limited to the buffer spring 413 and the hydraulic rod 414 in the above embodiment, and a linear motor can also be arranged. The linear motor is fixedly installed in the positioning recess, and the output end of the linear motor can be extended and retracted along the width direction of the first gap and is connected to the inner circumference of the shell 100. In order to better keep the calibrator body 200 stable, a servo can be arranged at the bottom center position of the calibrator body 200. The servo is a position (angle) servo drive, which is suitable for control systems that require continuous changes in angles and can be maintained. The movement of the linear motors on all sides is controlled according to the signal of the servo.

[0103] It should be noted that the buffer assembly 410 can be a structure of any one of the above-mentioned buffer components, as well as a structure of any combination of multiple buffer components, and the embodiments of the present invention do not specifically limit this.

[0104] The embodiment of the present invention further provides a tester 10 for a gas density relay, such as Figure 1 and Figure 2 As shown, a receiving component 500 is disposed outside the shell 100 , and at least a portion of the gas pipeline 301 is received in the receiving component 500 .

[0105] The gas pipeline 301 of the gas storage member 300 extends out of the housing 100 through the opening 101 of the housing 100, so as to facilitate the connection of the gas density relay during the test. The storage member 500 outside the housing 100 can be provided to store the gas pipeline 301. On the one hand, the gas pipeline 301 stored in the storage member 500 can reduce the possibility of being damaged by other components due to exposure to the outside, thereby reducing the risk of gas leakage in the gas pipeline 301; on the other hand, the possibility of the gas pipeline 301 exposed outside the housing 100 being entangled and knotted is reduced, making it more convenient for the gas pipeline 301 to be connected to the gas density relay.

[0106] It should be noted that if Figure 1 and Figure 7As shown, on both sides of the length direction Y of the housing 100, receiving components 500 ( Figure 1 The calibrator 10 shown only shows the storage component 500 on one side along the length direction Y, which can respectively store and protect the air inlet pipeline 310 and the air outlet pipeline 320 of the air storage component 300.

[0107] The specific structure of the storage component 500 is described below.

[0108] like Figure 1 , Figure 8 and Fig. 9 As shown, the storage member 500 includes a storage box 510, and a roller 520 and a driving member 530 disposed in the storage box 510. The storage box 510 is fixedly assembled with the housing 100, the roller 520 is rotatably assembled on the calibrator body 200, and the driving member 530 is drivingly connected with the roller 520. The driving member 530 can be a rotary motor commonly used in the art. Regarding the model and specification of the rotary motor, those skilled in the art can design it according to actual conditions and specific needs, and this embodiment does not specifically limit this.

[0109] It should be noted that if Figure 1 As shown, the storage box 510 can be fixed to the shell 100 by multiple bolts. Of course, the storage box 510 and the shell 100 are not limited to the above connection method, and can also be fixed by snapping, riveting or gluing. The embodiments of the present invention do not make specific limitations on this.

[0110] like Figure 8 and Fig. 9 As shown, the gas pipeline 301 of the gas storage member 300 extends from the opening 101 to the outside of the housing 100, and the portion extending to the outside of the housing 100 is wound on the roller 520. In addition, the end of the gas pipeline 301 extends to the outside of the storage box 510 to form a joint 302. It should be noted that in this embodiment, three gas storage members 300 are arranged in the calibrator body 200. Therefore, three groups of rollers 520 and driving members 530 are arranged in the storage box 510, and the gas pipeline 301 of the corresponding gas storage member 300 is wound on each roller 520.

[0111] When the joint 302 of the gas pipeline 301 needs to be connected to the gas density relay, the driving member 530 drives the roller 520 to rotate in the direction opposite to the winding direction, so that the gas pipeline 301 wound on the roller 520 is output to the outside of the storage box 510; after the gas density relay is calibrated, the gas pipeline 301 needs to be stored and recovered in the storage member 500, and the driving member 530 drives the roller 520 to rotate in the winding direction, and the gas pipeline 301 is wound on the roller 520. Through this structure, the winding and output of the gas pipeline 301 are more convenient.

[0112] Specifically, Fig. 9 As shown, in this embodiment, the storage component 500 further includes a movable rod 540 that is sleeved with the roller 520 , and a transmission rod 550 that is disposed between the movable rod 540 and the driving member 530 .

[0113] The movable rod 540 is rotatably disposed on the calibrator body 200 through at least two support frames 560, and one end of the transmission rod 550 is transmission-connected to the driving member 530, and the other end is transmission-connected to the movable rod 540. It should be noted that the transmission rod 550 and the movable rod 540, and the transmission rod 550 and the driving member 530 can be connected by spline connection, coupling connection or other shaft connection methods in the art, and the embodiments of the present invention do not specifically limit this.

[0114] In this embodiment, the power of the driving member 530 is transmitted to the movable rod 540 through the transmission rod 550, and the movable rod 540 drives the roller 520 sleeved on the outside to rotate, thereby realizing the storage and output of the gas pipeline 301. The support frame 560 provided on the calibrator body 200 supports the movable rod 540.

[0115] Of course, the storage component 500 is not limited to the structure in the above embodiment, and can also be set as a rotating shaft around which the gas pipeline 301 is wound, and a torsion spring in a pre-tightened state is set on the rotating shaft. When the calibration personnel need to pull out the gas pipeline 301, they overcome the torsion force of the torsion spring to pull it out, and the torsion spring is further twisted. When the gas pipeline 301 needs to be retracted into the storage component 500, they only need to release the external tension on the gas pipeline 301. Under the force of the torsion spring, the gas pipeline 301 is rewound on the rotating shaft. The embodiments of the present invention do not make specific limitations on this.

[0116] In summary, the present invention provides a calibrator 10 for a gas density relay. The calibrator pulls the gas pipeline 301 in the storage component 500 out of the storage box 510 through the joint 302, and connects it to the gas density relay, and controls the first valve assembly 340 and the second valve assembly 350 of the gas storage component 300 (the gas pipeline 301 is connected to the gas density relay) through the display unit 112 and the operation unit 111, and then adjusts the air pressure in the gas storage component 300, and calibrates the gas density relay according to the parameters and data built into the control chip of the calibrator 10. Of course, different gas density relays can be calibrated simultaneously by three gas storage components 300. The buffer device 400 arranged between the housing 100 and the calibrator body 200 can reduce the vibration transmitted to the calibrator body 200 when the calibrator 10 is moved.

[0117] The above is an explanation of the implementation mode of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation mode. On the contrary, the purpose of introducing the invention in conjunction with the implementation mode is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details will be included in the above description. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the key points of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0118] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0119] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0120] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0121] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0122] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A calibrator for a gas density relay, characterized in that: It comprises a shell and a calibration instrument body arranged in the shell, wherein at least one gas storage component is arranged in the calibration instrument body; The calibrator further includes a buffer device, which is arranged between the outer circumference of the calibrator body and the inner circumference of the shell, and the buffer device includes a plurality of buffer components, which are arranged at intervals along the circumference of the calibrator body; wherein, A first gap is formed between the outer peripheral side of the calibrator body and the inner peripheral side of the shell, and a second gap is formed between the bottom surface of the calibrator body and the corresponding surface of the shell. Each of the buffer components is located in the first gap and can be extended and retracted along the width direction of the first gap at its position, wherein the width direction of the first gap is perpendicular to the thickness direction of the calibrator body.

2. The calibrator for a gas density relay according to claim 1, characterized in that: The outer periphery of the calibrator body is located at four corners and is formed with mounting recesses on the side walls along its width direction. A corresponding buffer assembly is arranged in each mounting recess. The buffer assembly includes a first buffer member and a second buffer member spaced apart in the mounting recess.

3. The calibrator for a gas density relay according to claim 2, characterized in that: The first buffer member includes a buffer spring, each of which extends along the width direction of the first gap at its position, and one end of each buffer spring is connected to the corresponding mounting recess, and the other end is connected to the inner wall of the shell.

4. The calibrator for a gas density relay according to claim 2, characterized in that: The second buffer member includes a hydraulic rod, each of which has a cavity filled with liquid formed inside. The hydraulic rod has a fixed end and a telescopic end that can move along its axial direction. The fixed end of the hydraulic rod is connected to the corresponding mounting recess, and the telescopic end abuts against the positioning groove of the inner wall of the shell.

5. The calibrator for a gas density relay according to claim 4, characterized in that: An annular hydraulic cavity surrounding the outer circumference of the calibrator body is formed in the calibrator body; and The annular hydraulic chamber is located at the positions of the four mounting recesses, and is formed with branches communicating with the cavities corresponding to the hydraulic rods, so that the liquids in the cavities of the four hydraulic rods can flow.

6. The calibrator for a gas density relay according to any one of claims 1 to 5, characterized in that: An opening is formed on the side wall of the shell, and the gas storage member has a gas pipeline extending from the opening to the outside of the shell; A receiving component is arranged outside the shell, and at least a part of the gas pipeline is received in the receiving component.

7. The calibrator for a gas density relay according to claim 6, characterized in that: The storage component includes a storage box, and a roller and a driving member arranged in the storage box, the storage box is fixedly assembled with the shell, the roller is rotatably assembled on the calibration instrument body, and the driving member is drivingly connected with the roller; The gas pipeline of the gas storage member extends from the opening to the outside of the shell, and the portion extending to the outside of the shell is wound around the drum; and, The end of the gas pipeline extends to the outside of the storage box to form a joint.

8. The calibrator for a gas density relay according to claim 7, characterized in that: The storage component further comprises a movable rod sleeved with the roller, and a transmission rod arranged between the movable rod and the driving member; The movable rod is rotatably arranged on the calibration instrument body through at least two supporting frames. One end of the transmission rod is transmission-connected to the driving member, and the other end is transmission-connected to the movable rod.

9. The calibrator for a gas density relay according to claim 6, characterized in that: The gas pipeline of each of the gas storage components has an air inlet pipeline and an air outlet pipeline, and the air inlet pipeline and the air outlet pipeline extend from both sides of the length direction of the shell to the outside of the shell respectively. The storage components corresponding to the air inlet pipeline and the air outlet pipeline are formed on both sides of the length direction of the shell respectively.

10. The calibrator for a gas density relay according to claim 9, characterized in that: A control element is integrated in the gas storage component, and a first valve component is arranged between the gas storage component and the gas inlet pipeline, and a second valve component is arranged between the gas storage component and the gas outlet pipeline.

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