Safety valve thermal state verification device and method

Abstract

The invention discloses a safety valve thermal state verification device and method, and relates to the technical field of safety valve verification, and the safety valve thermal state verification device comprises a mixing tank; the opposite-tank heating part comprises a first heating pipe connected with the mixing tank, and the gas storage tank can be communicated with the mixing tank; the mounting pipe is connected with the mixing tank, and a safety valve to be tested is mounted on the mounting pipe; and the second heating piece is arranged on the mounting pipe and is used for heating the mixed gas in the mounting pipe. According to the technical scheme, the steam is fed into the mixing tank, and the air in the air storage tank is fed into the mixing tank, so that the mixed gas is formed in the mixing tank and directly passes through the mixed gas of the steam and the air to check the safety valve to be tested, and the problem that the test accuracy of the safety valve is relatively low is solved on the whole.

Description

Technical Field

[0001] The present invention relates to the technical field of safety valve calibration, and particularly relates to a safety valve hot state calibration device. Background Art

[0002] The safety valve is one of the important safety accessories of pressure-bearing special equipment. To ensure that the safety performance of the safety valve meets the technical requirements, the safety valve must be calibrated once a year. For safety valves used for steam, when the capacity of the test device is limited, air can be used instead of steam as the test medium to test the safety valve. The actual working environment of the safety valve is a high-temperature and high-pressure steam environment, and there is a large difference between the working environment and the test environment of the safety valve, resulting in a low accuracy of the safety valve test. Summary of the Invention

[0003] The main object of the present invention is to propose a safety valve hot state calibration device, aiming to improve the problem of low accuracy of the safety valve test.

[0004] To achieve the above object, the safety valve hot state calibration device proposed by the present invention includes:

[0005] A mixing tank;

[0006] A tank heating member, including a first heating pipe, the first heating pipe is connected to the mixing tank, and the first heating pipe is used to heat the water in the first heating pipe and send the generated steam into the mixing tank;

[0007] An air storage tank, which can be connected to the mixing tank;

[0008] An installation pipe, connected to the mixing tank, and a safety valve to be tested is installed on the installation pipe; and,

[0009] A second heating member, arranged on the installation pipe, for heating the mixed gas in the installation pipe.

[0010] In an embodiment, the safety valve hot state calibration device further includes a steam heating pipe, both ends of the steam heating pipe are connected to the mixing tank, and a third heating member is arranged on the steam heating pipe;

[0011] The tank heating member further includes the third heating member.

[0012] In an embodiment, the mixing tank has a first end and a second end in a first direction, and both ends of the steam heating pipe are respectively connected to the first end and the second end.

[0013] In an embodiment, a plurality of spoiler plates are sequentially arranged in the mixing tank along the first direction.

[0014] In one embodiment, a supply pipe is connected between the air outlet of the gas storage tank and the mixing tank, where:

[0015] A fourth heating element is provided on the supply pipe; and / or,

[0016] A supply valve is provided on the supply pipe.

[0017] In one embodiment, the safety valve hot state calibration device further includes a water tank, where:

[0018] The first heating pipe connects the water tank and the mixing tank; and / or,

[0019] The water tank is connected with a supply pipe and a drain pipe.

[0020] The present invention also provides a safety valve hot state calibration method, based on the safety valve hot state calibration device, the safety valve hot state calibration device includes:

[0021] Mixing tank;

[0022] Tank heating element, including a first heating pipe, the first heating pipe is connected to the mixing tank, and the first heating pipe is used to heat the water in the first heating pipe and send the generated steam into the mixing tank;

[0023] Gas storage tank, capable of being connected to the mixing tank;

[0024] Installation pipe, connected to the mixing tank, and a safety valve to be tested is installed on the installation pipe; and,

[0025] A second heating element is provided on the installation pipe for heating the mixed gas in the installation pipe.

[0026] The safety valve hot state calibration method includes the following steps:

[0027] Install the safety valve to be tested on the installation pipe;

[0028] After storing water in the first heating pipe, turn on the first heating pipe so that the water in the first heating pipe turns into steam and the steam enters the mixing tank;

[0029] When the steam parameters of the steam in the mixing tank meet the preset conditions, turn off the first heating pipe to form saturated steam;

[0030] Process the saturated steam to form superheated steam;

[0031] Connect the gas storage tank to the mixing tank so that the gas storage tank inputs air into the mixing tank and mixes with the superheated steam in the mixing tank to form a mixed gas and enter the installation pipe;

[0032] Turn on the second heating element to heat the gas mixture in the installation pipe so that the gas mixture in the safety pipe maintains the calibration temperature;

[0033] When the gas mixture in the mixing tank reaches the calibration pressure, control the gas storage tank to stop supplying gas to the mixing tank;

[0034] After determining the preset heating power, control the heating element for the tank to operate at the preset heating power to heat the interior of the mixing tank, so that the pressure of the gas mixture in the mixing tank increases;

[0035] Select the pressure at which the to-be-tested safety valve automatically opens as the opening pressure of the to-be-tested safety valve.

[0036] In one embodiment, the safety valve hot state calibration device further includes a steam heating pipe. Both ends of the steam heating pipe are connected to the mixing tank. A third heating element is provided on the steam heating pipe, and the heating element for the tank further includes the third heating element;

[0037] The processing of the saturated steam to form superheated steam includes:

[0038] Send the saturated steam in the mixing tank into the steam heating pipe;

[0039] Turn on the third heating element to heat the saturated steam in the steam heating pipe to form superheated steam;

[0040] Send the superheated steam into the mixing tank so that the saturated steam in the mixing tank is converted into superheated steam.

[0041] In one embodiment, a gas supply pipe is connected between the gas outlet of the gas storage tank and the mixing tank. A fourth heating element is provided on the gas supply pipe, and a gas supply valve is provided on the gas supply pipe;

[0042] Connect the gas storage tank and the mixing tank to enable the gas storage tank to input air into the mixing tank, including:

[0043] Start the fourth heating element to heat the air in the gas supply pipe;

[0044] Open the gas supply valve and send the heated air into the mixing tank.

[0045] In one embodiment, the safety valve hot state calibration method further includes the following steps:

[0046] Select a calibration pressure according to the safety valve to be tested, and calculate the theoretical discharge velocity of the steam of the safety valve to be tested according to the flow area and superheated steam correction coefficient of the safety valve to be tested.

[0047] Obtain the steam discharge of the safety valve to be tested within a preset time according to the theoretical discharge velocity.

[0048] Calculate the heat value of the steam discharged by the safety valve to be tested within the preset time under the calibration pressure according to the steam enthalpy value corresponding to the calibration pressure, and use the heat value as the value of the heat balance power required for the mixing tank to maintain heat balance.

[0049] Determine the preset heating power as a power value greater than or equal to the heat balance power.

[0050] The technical solution of the present invention heats water into steam by starting the first heating element and sends the steam into the mixing tank, so as to fill the mixing tank with steam. Then, the gas storage tank is connected to the mixing tank, and the air in the gas storage tank can be sent into the mixing tank to form a mixed gas in the mixing tank and make the mixed gas in the mixing tank reach the calibration pressure. Starting the second heating element can make the mixed gas in the installation pipe reach and maintain the calibration temperature, so that the pressure of the mixed gas in the safety valve to be tested reaches the calibration pressure and the temperature remains at the calibration temperature, and directly calibrate the safety valve to be tested through the mixed gas of steam and air, which improves the problem of low accuracy of the safety valve test as a whole. Description of the Drawings

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0052] Figure 1 It is a schematic structural diagram of an embodiment of the hot state calibration device for a safety valve provided by the present invention.

[0053] Explanation of the reference numerals in the drawings:

[0054] 1. Mixing tank; 11. Turbulence plate; 12. Pressure gauge; 2. Tank heating element; 21. First heating pipe; 22. Third heating element; 3. Gas storage tank; 31. Gas supply valve; 32. Fourth heating element; 4. Installation pipe; 41. Thermometer; 42. Flange; 43. Drain pipe; 44. Drain valve; 5. Second heating element; 6. Steam heating pipe; 61. Fan; 7. Water tank; 71. Water supply pipe; 711. Water supply valve; 72. Drain pipe; 721. Drain valve; 8. Water level gauge.

[0055] The realization, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0056] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0057] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0058] In addition, if there are descriptions such as "first" and "second" in the embodiments of the present invention, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0059] The safety valve is one of the important safety accessories for pressure-bearing special equipment. To ensure that the safety performance of the safety valve meets the technical requirements, the safety valve must be calibrated once a year. For a safety valve used for steam, when the capacity of the test device is limited, air can be used instead of steam as the test medium to test the safety valve. The actual working environment of the safety valve is a high-temperature and high-pressure steam environment, and there is a large difference between the working environment and the test environment of the safety valve, resulting in a low accuracy of the safety valve test.

[0060] The present invention provides a hot-state calibration device for a safety valve.

[0061] Please refer to Figure 1 , in an embodiment of the present invention, the hot-state calibration device for the safety valve includes:

[0062] A mixing tank 1;

[0063] A tank heating element 2, including a first heating pipe 21, the first heating pipe 21 is connected to the mixing tank 1, and the first heating pipe 21 is used to heat the water in the first heating pipe 21 and send the generated steam into the mixing tank 1;

[0064] A gas storage tank 3, which can be connected to the mixing tank 1;

[0065] An installation pipe 4, connected to the mixing tank 1, and a safety valve to be tested is installed on the installation pipe 4; and,

[0066] A second heating element 5, arranged on the installation pipe 4, for heating the mixed gas in the installation pipe 4.

[0067] The technical solution of the present invention starts the first heating element, heats water into steam, and sends the steam into the mixing tank 1, so as to fill the mixing tank 1 with steam. Then, the gas storage tank 3 is connected to the mixing tank 1, and the air in the gas storage tank 3 can be sent into the mixing tank 1, thereby forming a mixed gas in the mixing tank 1 and making the mixed gas in the mixing tank 1 reach the calibration pressure; starting the second heating element 5 can make the mixed gas in the installation pipe 4 reach and maintain the calibration temperature, so that the pressure of the mixed gas in the safety valve to be tested reaches the calibration pressure and the temperature remains at the calibration temperature, and directly calibrates the safety valve to be tested through the mixed gas of steam and air, generally improving the problem of low accuracy of the safety valve test.

[0068] Specifically, the first heating pipe 21 is an electromagnetic heating pipe, and the first heating pipe 21 has the advantages of fast heating reaction speed and small volume.

[0069] The installation pipe 4 is located on the top side of the mixing tank 1, and a flange 42 is provided on the installation pipe 4, and the safety valve to be tested is installed on the flange 42.

[0070] Please refer to Figure 1 , the hot state calibration device of the safety valve further includes a steam heating pipe 6. Both ends of the steam heating pipe 6 are communicated with the mixing tank 1, and a third heating element 22 is arranged on the steam heating pipe 6;

[0071] The tank heating element 2 further includes the third heating element 22.

[0072] After the steam in the mixing tank 1 is introduced into the steam heating pipe 6, through the third heating element 22, the heating of the steam in the steam heating pipe 6 can be realized, and then the steam in the steam heating pipe 6 is introduced into the mixing tank 1, realizing the heating of the steam in the mixing tank 1.

[0073] A blower 61 is connected to the steam heating pipe 6. By means of the blower 61, the air in the mixing tank 1 can be pumped into the steam heating pipe 6, and the steam in the steam heating pipe 6 can be sent into the mixing tank 1.

[0074] The mixing tank 1 has a first end and a second end in a first direction. Both ends of the steam heating pipe 6 are respectively connected to the first end and the second end. It is convenient to pump the steam with a lower temperature into the steam heating pipe, improving the heating efficiency of the steam in the mixing tank 1.

[0075] A plurality of spoiler plates 11 are sequentially arranged in the mixing tank 1 along the first direction. By means of the spoiler plates 11, the mixing efficiency of the gas in the mixing tank 1 can be accelerated.

[0076] Please refer to Figure 1 , a gas supply pipe is connected between the air outlet of the gas storage tank 3 and the mixing tank 1. Wherein, a fourth heating element 32 is arranged on the gas supply pipe.

[0077] Through the fourth heating element 32, the heating of the air in the gas supply pipe can be realized, thereby increasing the temperature of the mixed gas.

[0078] A gas supply valve 31 is arranged on the gas supply pipe. Through the gas supply valve 31, the on-off of the gas supply pipe can be controlled.

[0079] The second heating element 5, the third heating element 22 and the fourth heating element 32 are all electromagnetic heating pipes, which have the advantages of fast heating speed and convenient heating control.

[0080] The hot state calibration device of the safety valve further includes a water tank 7. Wherein, the first heating pipe 21 is connected to the water tank 7 and the mixing tank 1.

[0081] Through the water tank 7, the water supply to the first heating pipe 21 can be realized.

[0082] The water tank 7 is connected with a water supply pipe 71 and a drain pipe 72. Through the water supply pipe 71 and the drain pipe 72, the water supply and drainage of the water tank 7 can be realized. A water supply valve 711 is arranged on the water supply pipe 71, and a drain valve 721 is arranged on the drain pipe 72, which can facilitate the control of the on-off of the water supply pipe 71 and the drain pipe 72.

[0083] The second heating element 5 is located in the installation pipe 4, which can effectively heat the gas in the safety pipe and reduce the suspended water droplets in the installation pipe 4. A thermometer 41 is arranged on the installation pipe 4, through which the temperature of the gas in the installation pipe 4 can be easily detected.

[0084] By controlling the opening and closing and power of the second heating element 5, the temperature of the gas in the installation pipe 4 can be adjusted, so that the mixed gas in the installation pipe 4 maintains the calibration temperature.

[0085] A pressure gauge 12 is arranged on the mixing tank 1, through which the pressure of the mixed gas in the mixing tank 1 can be easily detected.

[0086] A water level gauge 8 is connected between the water tank 7 and the mixing tank 1, realizing the connection of the pressures at both ends of the water level gauge 8, which is convenient for the water level gauge 8 to detect the water level in the first heating pipe 21.

[0087] An exhaust pipe 43 is connected to the installation pipe 4, and an exhaust valve 44 is arranged on the exhaust pipe 43. By opening the exhaust valve 44, the installation pipe 4 can be exhausted.

[0088] The present invention also provides a method for hot state calibration of a safety valve. The method for hot state calibration of the safety valve is based on a hot state calibration device for the safety valve, and the specific structure of the hot state calibration device for the safety valve refers to the above-mentioned embodiment.

[0089] The hot state calibration device for the safety valve includes:

[0090] A mixing tank 1;

[0091] A tank heating element 2, including a first heating pipe 21, the first heating pipe 21 is connected to the mixing tank 1, and the first heating pipe 21 is used to heat the water in the first heating pipe 21 and send the generated steam into the mixing tank 1;

[0092] A gas storage tank 3, which can be connected to the mixing tank 1;

[0093] An installation pipe 4, which is connected to the mixing tank 1, and a safety valve to be tested is installed on the installation pipe 4; and,

[0094] The second heating element 5 is arranged on the installation pipe 4 and is used to heat the mixed gas in the installation pipe 4.

[0095] The hot state calibration method of the safety valve includes the following steps:

[0096] Install the safety valve to be tested on the installation pipe 4;

[0097] After storing water in the first heating pipe 21, turn on the first heating pipe 21 so that the water in the first heating pipe 21 turns into steam, and the steam enters the mixing tank 1;

[0098] When the steam parameters of the steam in the mixing tank 1 meet the preset conditions, turn off the first heating pipe 21 to form saturated steam;

[0099] Process the saturated steam to form superheated steam;

[0100] Connect the gas storage tank 3 with the mixing tank 1 so that the gas storage tank 3 inputs air into the mixing tank 1 and mixes with the superheated steam in the mixing tank 1 to form a mixed gas, which enters the installation pipe 4;

[0101] Turn on the second heating element 5 to heat the mixed gas in the installation pipe 4 so that the mixed gas in the safety pipe maintains the calibration temperature;

[0102] When the mixed gas in the mixing tank 1 reaches the calibration pressure, control the gas storage tank 3 to stop supplying gas to the mixing tank 1;

[0103] After determining the preset heating power, control the tank heating element 2 to work at the preset heating power to heat the inside of the mixing tank 1 so that the pressure of the mixed gas in the mixing tank 1 increases;

[0104] Select the pressure when the safety valve to be tested automatically opens as the opening pressure of the safety valve to be tested.

[0105] After the pressure of the mixed gas in the mixing tank 1 reaches the calibration pressure and the safety valve to be tested does not automatically open, heating the inside of the mixing tank 1 by the tank heating element 2 at the preset heating power can increase the pressure of the mixed gas in the mixing tank 1, thereby testing the pressure when the safety valve to be tested automatically opens.

[0106] The hot state calibration device of the safety valve further includes a steam heating pipe 6. Both ends of the steam heating pipe 6 are connected to the mixing tank 1. A third heating element 22 is arranged on the steam heating pipe 6. The tank heating element 2 further includes the third heating element 22;

[0107] Processing the saturated steam to form superheated steam includes:

[0108] Sending the saturated steam in the mixing tank 1 into the steam heating pipe 6;

[0109] Turning on the third heating element 22 to heat the saturated steam in the steam heating pipe 6 to form superheated steam;

[0110] Sending the superheated steam into the mixing tank 1 so that the saturated steam in the mixing tank 1 is converted into superheated steam.

[0111] Heating the steam by the third heating element 22 can increase the temperature of the mixed gas and reduce the liquefaction generated when forming the mixed gas.

[0112] A gas supply pipe is connected between the gas outlet of the gas storage tank 3 and the mixing tank 1. A fourth heating element 32 is provided on the gas supply pipe, and a gas supply valve 31 is provided on the gas supply pipe;

[0113] Connecting the gas storage tank 3 and the mixing tank 1 to communicate so that the gas storage tank 3 inputs air into the mixing tank 1 includes:

[0114] Starting the fourth heating element 32 to heat the air in the gas supply pipe;

[0115] Opening the gas supply valve 31 and sending the heated air into the mixing tank 1.

[0116] Heating the air in the gas supply pipe by the fourth heating element 32 can increase the temperature of the mixed gas formed in the mixing tank 1, making the temperature of the mixed gas closer to the calibration temperature of the safety valve to be tested.

[0117] The safety valve hot state calibration method further includes the following steps:

[0118] Selecting a calibration pressure according to the safety valve to be tested, and calculating the theoretical discharge velocity of the steam of the safety valve to be tested according to the flow channel area and superheated steam correction coefficient of the safety valve to be tested;

[0119] Obtaining the steam discharge volume of the safety valve to be tested within a preset time according to the theoretical discharge velocity;

[0120] Calculating the heat value of the steam discharged by the safety valve to be tested within the preset time under the calibration pressure according to the steam enthalpy value corresponding to the calibration pressure, and using the heat value as the value of the heat balance power required for the mixing tank 1 to maintain heat balance;

[0121] Determining the preset heating power as a power value greater than or equal to the heat balance power.

[0122] When the safety valve to be tested opens under the calibration pressure, heating the inside of the mixing tank 1 at a preset heating power can ensure that the pressure in the mixing tank 1 remains relatively stable, facilitating the detection of the safety valve to be tested.

[0123] Specifically, the theoretical discharge rate of steam is set as Wts, with the unit of kilograms per hour; the flow area of the safety valve to be tested is set as A, with the unit of square millimeters, and this parameter is marked on the nameplate of the safety valve to be tested. Wts = 5.25 * A * Pd * KSH. Among them, the indication of A is recorded on the nameplate of the safety valve to be tested; Pd is the actual calibration pressure, with the unit of megapascal (MPa); KSH is the superheated steam correction coefficient, and the value of KSH is executed according to the relevant requirements of GB / T 12241 General Requirements for Safety Valves. Specifically, when the test medium is saturated steam, the value of KSH is 1.

[0124] The steam discharge of the safety valve to be tested within one second is set as W1, and W1 = Wts / 3600. Among them, the steam volume of W1 refers to the mass required for the calibration opening action of the safety valve to be tested, with the unit of kilograms, and W1 refers to the steam volume required to replace the mixed gas discharged when the safety valve opens for one second; during the detection of the safety valve to be tested, by supplementing steam to maintain the pressure in the mixing tank, W1 is the steam supplement volume per second, that is, W1 is the steam supplement speed.

[0125] The heat value of the steam discharged by the safety valve to be tested within the preset time under the calibration pressure is set as Q, and Q = W1 * H. H is the steam enthalpy value corresponding to the safety valve at a certain discharge pressure, with the unit of kilojoules per kilogram (KJ / Kg). When the supplemented steam is saturated steam, for example, when the set pressure of the safety valve to be tested is 1 MPa, the corresponding enthalpy value of H is: 2777 KJ / Kg. When the supplemented steam is superheated steam, for example, when the set pressure of the safety valve to be tested is 1 MPa, the corresponding enthalpy value of H is: 2832 KJ / Kg. Q is the heat heated per second. H can be obtained by looking up the table.

[0126] Let the thermal efficiency of the tank heating element 2 be KR. Specifically, KR is the electromagnetic heating efficiency, which is the efficiency of converting electricity into heat provided by the electromagnetic heating manufacturer. The power of the thermal balance power is set as W2, then W2 = Q / KR.

[0127] When heating the mixing tank 1 at a preset heating power, one of the first heating tube 21 and the third heating element 22 can be started alone, or the first heating tube 21 and the third heating element 22 can be started simultaneously.

[0128] In an embodiment of the present invention, the first heating element is started to heat water into steam and send the steam into the mixing tank 1, so as to fill the mixing tank 1 with steam. Then, the gas storage tank 3 is communicated with the mixing tank 1, and the air in the gas storage tank 3 can be sent into the mixing tank 1, so as to form a mixed gas in the mixing tank 1 and make the mixed gas in the mixing tank 1 reach the calibration pressure. By starting the second heating element 5, the mixed gas in the installation pipe 4 can reach and maintain the calibration temperature, so that the pressure of the mixed gas in the safety valve to be tested reaches the calibration pressure and the temperature remains at the calibration temperature. The safety valve to be tested is directly calibrated with the mixed gas of steam and air, which generally improves the problem of low accuracy in the test of the safety valve.

[0129] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the technical concept of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A hot-state calibration device for a safety valve, characterized in that, Comprising: A mixing tank; A tank heating member, including a first heating pipe, the first heating pipe being connected to the mixing tank, the first heating pipe being configured to heat the water in the first heating pipe and send the generated steam into the mixing tank; A gas storage tank capable of being connected to the mixing tank; A mounting pipe connected to the mixing tank, with a safety valve to be tested mounted on the mounting pipe; and, A second heating member provided on the mounting pipe for heating the mixed gas in the mounting pipe.

2. The hot-state calibration device for safety valves according to claim 1, characterized in that, The safety valve hot state calibration device further includes a steam heating pipe, both ends of the steam heating pipe being connected to the mixing tank, and a third heating member being provided on the steam heating pipe; The tank heating member further includes the third heating member.

3. The hot-state calibration device for safety valves according to claim 2, characterized in that, The mixing tank has a first end and a second end in a first direction, and both ends of the steam heating pipe are respectively connected to the first end and the second end.

4. The hot-state calibration device for safety valves according to claim 1, characterized in that, A plurality of flow deflectors are sequentially arranged in the mixing tank along the first direction.

5. The hot-state calibration device for safety valves according to claim 1, characterized in that, A gas supply pipe is connected between the gas outlet of the gas storage tank and the mixing tank, wherein: A fourth heating member is provided on the gas supply pipe; and / or, A gas supply valve is provided on the gas supply pipe.

6. The hot-state calibration device for safety valves according to claim 1, characterized in that, The safety valve hot state calibration device further includes a water tank, wherein: The first heating pipe connects the water tank and the mixing tank; and / or, The water tank is connected with a water supply pipe and a drain pipe.

7. A hot-state calibration method for a safety valve, based on the hot-state calibration device for a safety valve according to any one of claims 1-6, characterized in that, The safety valve hot state calibration method includes the following steps: Mount the safety valve to be tested on the mounting pipe; After storing water in the first heating pipe, turn on the first heating pipe so that the water in the first heating pipe turns into steam and the steam enters the mixing tank; When the steam parameters of the steam in the mixing tank meet the preset conditions, turn off the first heating pipe to form saturated steam; Process the saturated steam to form superheated steam; Connect the gas storage tank to the mixing tank so that the gas storage tank inputs air into the mixing tank and mixes with the superheated steam in the mixing tank to form a mixed gas and enter the mounting pipe; Turn on the second heating member to heat the mixed gas in the mounting pipe so that the mixed gas in the safety pipe maintains the calibration temperature; When the mixed gas in the mixing tank reaches the calibration pressure, control the gas storage tank to stop supplying gas to the mixing tank; After determining the preset heating power, control the tank heating member to work at the preset heating power to heat the interior of the mixing tank so that the pressure of the mixed gas in the mixing tank increases; Select the pressure at which the safety valve to be tested automatically opens as the opening pressure of the safety valve to be tested.

8. The hot-state calibration method of the safety valve according to claim 7, wherein, The safety valve hot state calibration device further includes a steam heating pipe, both ends of the steam heating pipe being connected to the mixing tank, a third heating member being provided on the steam heating pipe, and the tank heating member further includes the third heating member; The processing the saturated steam to form superheated steam includes: Send the saturated steam in the mixing tank into the steam heating pipe; Turn on the third heating member to heat the saturated steam in the steam heating pipe to form superheated steam; Feed the superheated steam into the mixing tank so that the saturated steam in the mixing tank is converted into superheated steam.

9. The method for hot state calibration of a safety valve according to claim 7, wherein A gas supply pipe is connected between the gas outlet of the gas storage tank and the mixing tank. A fourth heating element is arranged on the gas supply pipe, and a gas supply valve is arranged on the gas supply pipe; Connect the gas storage tank and the mixing tank to communicate with each other so that the gas storage tank inputs air into the mixing tank, including: Start the fourth heating element to heat the air in the gas supply pipe; Open the gas supply valve and feed the heated air into the mixing tank.

10. The method for hot state calibration of the safety valve according to claim 7, characterized in that, The method for hot state calibration of the safety valve further includes the following steps: Select a calibration pressure according to the safety valve to be tested, and calculate the theoretical discharge velocity of the steam by the safety valve to be tested according to the flow channel area and superheated steam correction coefficient of the safety valve to be tested; Obtain the steam discharge volume of the safety valve to be tested within a preset time according to the theoretical discharge velocity; Calculate the heat value of the steam discharged by the safety valve to be tested within the preset time under the calibration pressure according to the steam enthalpy value corresponding to the calibration pressure, and use the heat value as the value of the heat balance power required for the mixing tank to maintain heat balance; Determine the preset heating power as the power value greater than or equal to the heat balance power.

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