Fire-retardant breather valve detection equipment

Abstract

The utility model relates to fire-retardant breather valve detection equipment which comprises a detection container, an ignition isolation cover and a controller, an opening of the detection container is connected with a fire-retardant breather valve, the detection container is connected with a combustible gas inlet device and a pressure gas measuring device, and a micro differential pressure sensor and a first flame sensor are arranged on the detection container; the ignition isolation hood covers the outer side of the fire-retardant breather valve in a sealing manner; an electronic ignition head, a combustible gas concentration detection device, a micro-flow detection device, a second flame sensor and an air vent are arranged on the ignition isolation hood; the controller controls the combustible gas inlet device, the gas pressure measuring device, the electronic ignition head, the combustible gas concentration detecting device and the micro-flow monitoring device. The controller receives sensing information of the micro-differential pressure sensor, the first flame sensor and the second flame sensor. The detection equipment provided by the utility model realizes the detection of various performances of the fire-retardant breather valve, the detection process is full-automatic, the detection result is accurate, and the intelligent degree is high.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent detection of fire-retardant breathing valves, in particular to a fire-retardant breathing valve detection device. Background Art

[0002] The working principle of the fire-arresting breathing valve is to use a spring to limit the valve plate. The positive or negative pressure determines whether it is inhaled or exhaled. The breathing valve has the functions of releasing both positive and negative pressure. When the container is under positive pressure, the breathing valve opens to release the positive pressure by exhaling the gas; when the container is under negative pressure, the fire-arresting breathing valve opens to release the negative pressure by inhaling the gas. This ensures that the pressure is within a certain range and the safety of the container. It can be understood as replacing two one-way valves with appropriate pressures. The fire-arresting breathing valve can not only maintain the air pressure balance of the storage tank and ensure that the storage tank is destroyed in the event of overpressure or vacuum, but also reduce the medium and loss in the tank. There are many existing fire-arresting breathing valve testing items, which require multiple experiments for performance testing. Moreover, the testing equipment for each experiment is relatively complex, occupies a large area and is inflexible, which is not conducive to technological development. Utility Model Content

[0003] The embodiment of the utility model provides a fire-retardant breathing valve detection device to solve the problem in the prior art that the device has a single function and a complex structure, resulting in inflexible detection.

[0004] In order to achieve the above objectives, the present invention provides the following technical solutions:

[0005] A fire-stop breathing valve detection device is used to detect various performances of the fire-stop breathing valve, including a detection container, an ignition isolation cover and a controller, the opening of the detection container is connected to the fire-stop breathing valve, the detection container is connected to a combustible gas intake device and a pressure measuring gas device, and the detection container is provided with a micro-pressure differential sensor and a first flame sensor; the ignition isolation cover sealing cover is on the outside of the fire-stop breathing valve, and the ignition isolation cover is provided with an electronic ignition head, a combustible gas concentration detection device, a micro-flow detection device, a second flame sensor, and an air vent; the controller controls the combustible gas intake device, the pressure measuring gas device, the electronic ignition head, the combustible gas concentration detection device and the micro-flow monitoring device respectively, and the controller receives the sensing information of the micro-pressure differential sensor, the first flame sensor, and the second flame sensor respectively.

[0006] Furthermore, the combustible gas intake device includes a combustible gas intake pipe and a dilution gas intake pipe for introducing non-combustible gas. The combustible gas intake pipe is provided with a combustible gas flow meter and a combustible gas solenoid valve. The dilution gas intake pipe is provided with a dilution gas flow meter and a dilution gas solenoid valve. The combustible gas flow meter, combustible gas solenoid valve, dilution gas flow meter, and dilution gas solenoid valve are all connected to a controller.

[0007] Furthermore, the pressure measuring gas device includes a pressure measuring gas pipe, on which a pressure measuring gas solenoid valve, a positive / negative pressure axial flow fan and a gas flow rate sensor are provided. The pressure measuring gas solenoid valve, the positive / negative pressure axial flow fan and the gas flow rate sensor are all connected to the controller.

[0008] Furthermore, the combustible gas concentration detection device and the micro-flow detection device are both arranged on the top of the ignition isolation cover.

[0009] Furthermore, the combustible gas concentration detection device includes a combustible gas outlet pipe connected to the ignition isolation cover, and the combustible gas outlet pipe is provided with a combustible gas outlet solenoid valve and a combustible gas concentration sensor. The combustible gas outlet electronic valve and the combustible gas concentration sensor exchange information with the controller.

[0010] Furthermore, the micro-flow detection device includes a micro-flow outlet pipe connected to the ignition isolation cover, and the micro-flow outlet pipe is provided with a micro-flow solenoid valve and a micro-flow sensor, and the micro-flow solenoid valve and the micro-flow sensor both interact with the controller.

[0011] Furthermore, a plurality of electronic ignition heads are evenly distributed from top to bottom in the ignition isolation cover, so as to achieve uniform combustion of the combustible gas in the ignition isolation cover.

[0012] Furthermore, a frame is provided between the ignition isolation cover and the detection container, the frame fixes the detection container, and the frame and the ignition isolation cover are detachably and sealedly connected.

[0013] Furthermore, an observation window is provided on the ignition isolation cover.

[0014] The embodiment of the utility model has the following advantages:

[0015] The utility model provides a fire-retardant breathing valve detection device comprising a detection container, an ignition isolation cover, and a controller. The opening of the detection container is connected to the fire-retardant breathing valve, and the ignition isolation cover is sealed and illuminated on the outside of the fire-retardant breathing valve. The detection container is provided with a combustible gas intake device with a settable concentration, and a pressure measuring device with settable wind speed and wind direction. The ignition isolation cover is provided with an electronic ignition head, a combustible gas concentration detection device for detecting the concentration of combustible gas, a micro-flow detection device for detecting the gas flow, a second flame sensor, and a vent. The controller controls the combustible gas intake device, the pressure measuring device, the electronic ignition head, the combustible gas concentration detection device, and the micro-flow monitoring device respectively, and receives sensing information from the micro-pressure differential sensor, the first flame sensor, and the second flame sensor respectively. The device realizes multiple performance tests on the fire-retardant breathing valve, and the detection process is fully automatic, the detection results are accurate, and the degree of intelligence is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0018] Figure 1 A product structure diagram of a fire-retardant breathing valve detection device provided by an embodiment of the utility model;

[0019] Figure 2 A product structure diagram of a fire-retardant breathing valve detection device provided by an embodiment of the present utility model with the ignition isolation cover removed;

[0020] Figure 3 for Figure 2 Front view of

[0021] Figure 4 A product structure diagram of an ignition isolation cover in a fire-retardant breathing valve detection device provided by an embodiment of the utility model;

[0022] Figure 5 This is a system structure diagram of a fire-retardant breathing valve detection device provided in an embodiment of the present utility model.

[0023] In the picture:

[0024] 1. Detection container; 2. Flame-retardant breathing valve; 3. Combustible gas inlet device; 4. Combustible gas flow meter; 5. Combustible gas solenoid valve; 6. Dilution gas flow meter; 7. Dilution gas solenoid valve; 8. Pressure measuring device; 9. Pressure measuring solenoid valve; 10. Positive / negative pressure axial flow fan; 11. Gas flow rate sensor; 12. Micro-pressure differential sensor; 13. First flame sensor;

[0025] 14. Ignition isolation cover; 15. Electronic ignition head; 16. Combustible gas concentration detection device; 17. Combustible gas outlet solenoid valve; 18. Combustible gas concentration sensor; 19. Micro flow detection device; 20. Micro flow solenoid valve; 21. Micro flow sensor; 22. Second flame sensor; 23. Vent;

[0026] 24. Rack; 25. Controller. DETAILED DESCRIPTION

[0027] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0028] like Figure 1 As shown, a fire-retardant breathing valve detection device is used to detect various properties of the fire-retardant breathing valve 2, including a detection container 1, an ignition isolation cover 14 and a controller 25. The specific implementation and beneficial effects of each structure are described below:

[0029] 1. Detection container

[0030] like Figure 2-3 As shown, the opening of the detection container 1 is connected to the fire-stop breathing valve 2. The detection container 1 is a sealed tank. This embodiment is not limited to the opening direction of the detection container 1. Preferably, the opening is upward. A reducing flange is provided at the opening of the detection container 1, which can be sealed and connected to fire-stop breathing valves 2 of different sizes.

[0031] The detection container 1 is connected to a combustible gas inlet device 3 for admitting combustible gas into the detection container 1. The combustible gas inlet device 3 includes a combustible gas inlet pipe and a dilution gas inlet pipe for admitting non-combustible gas. In this embodiment, propane is used as the combustible gas, and air is used as the dilution gas. The combustible gas inlet pipe and the dilution gas inlet pipe can be connected to the detection container 1 separately, or they can be connected to a main channel, which is then connected to the detection container 1. The combustible gas inlet pipe is equipped with a combustible gas flowmeter 4 and a combustible gas solenoid valve 5. The combustible gas flowmeter 4 is preferably an electronic gas flowmeter for measuring the inflow of combustible gas, and the combustible gas solenoid valve 5 is used to control the flow of the combustible gas inlet pipe. The dilution gas inlet pipe is equipped with a dilution gas flowmeter 6 and a dilution gas solenoid valve 7. The dilution gas flowmeter 6 is preferably an electronic flowmeter for measuring the inflow of dilution gas, and the dilution gas solenoid valve 7 is used to control the flow of the dilution gas inlet pipe. The combustible gas flowmeter 4, combustible gas solenoid valve 5, dilution gas flowmeter 6, and dilution gas solenoid valve 7 are all connected to a controller 25.

[0032] The detection container 1 is connected to a pressure measuring gas device 8 for controlling the flow of pressure measuring gas. The pressure measuring gas device 8 includes a pressure measuring gas pipe, which is equipped with a pressure measuring gas solenoid valve 9, a positive / negative pressure axial flow fan 10, and a gas flow rate sensor 11. The pressure measuring gas solenoid valve 9, the positive / negative pressure axial flow fan 10, and the gas flow rate sensor 11 are all connected to a controller 25. The side pressure gas solenoid valve is used to control the on / off of the pressure measuring gas pipe, and the positive / negative pressure axial flow fan 10 is used to control the direction of the pressure measuring gas, thereby controlling the positive and negative pressure changes in the detection container 1. The gas flow rate sensor 11 is used to detect the gas flow in the pressure measuring gas pipe.

[0033] The detection container 1 is provided with a micro differential pressure sensor 12 and a first flame sensor 13. The micro differential pressure sensor 12 is used to collect pressure changes in the detection container 1. The first flame sensor 13 is preferably provided at the opening of the detection container 1 to detect whether there is a flame there.

[0034] 2. Ignition isolation cover

[0035] like Figure 4 As shown, the ignition isolation cover 14 is sealed on the outside of the flame-blocking breathing valve 2, and the ignition isolation cover 14 is provided with an electronic ignition head 15, a combustible gas concentration detection device 16, a micro-flow detection device 19, a second flame sensor 22, and a vent 23.

[0036] The ignition isolation cover 14 is provided with a combustible gas concentration detection device 16. The combustible gas concentration detection device 16 is preferably located on the top of the ignition isolation cover 14. This ensures that the combustible gas fills the ignition isolation cover 14 when the combustible gas concentration reaches the standard. The combustible gas concentration detection device 16 includes a combustible gas outlet pipe connected to the ignition isolation cover 14. The combustible gas outlet pipe is provided with a combustible gas outlet solenoid valve 17 and a combustible gas concentration sensor 18. The combustible gas outlet solenoid valve 17 and the combustible gas concentration sensor 18 exchange information with the controller 25. The combustible gas outlet solenoid valve 17 is used to control the opening and closing of the combustible gas outlet pipe, and the combustible gas concentration sensor 18 is used to collect the concentration of the combustible gas in the combustible gas outlet pipe.

[0037] The ignition isolation cover 14 is provided with a micro-flow detection device 19, which is preferably arranged on the top of the ignition isolation cover 14, so that it can be determined that the specified gas can fill the ignition isolation cover 14 when the gas flow rate is detected to meet the standard. The micro-flow detection device 19 includes a micro-flow outlet pipe connected to the ignition isolation cover 14, and the micro-flow outlet pipe is provided with a micro-flow solenoid valve 20 and a micro-flow sensor 21. The micro-flow solenoid valve 20 and the micro-flow sensor 21 both exchange information with the controller 25. The micro-flow solenoid valve 20 is used to control the opening and closing of the micro-flow outlet pipe, and the micro-flow sensor 21 is used to collect the flow of the specified gas in the micro-flow outlet pipe.

[0038] The ignition isolation cover 14 is provided with multiple electronic ignition heads 15 evenly distributed from top to bottom to achieve uniform combustion of the combustible gas in the ignition isolation cover 14. The second flame sensor 22 is used to detect whether there is a flame in the ignition isolation cover 14, and is used to detect whether the ignition is successful or the flame is extinguished.

[0039] The vent 23 is used to cover a plastic bag for explosion resistance test of the fire-resistance breathing valve 2. An observation window is provided on the ignition isolation cover, and the observation window is made of fireproof glass, which is convenient for staff to observe the internal situation of the ignition isolation cover from the outside.

[0040] Since the ignition isolation cover and the detection container 1 are detachably connected, it is necessary to remove the ignition isolation cover before installing the fire-blocking breathing valve 2 that needs to be tested. Therefore, a frame 24 is set between the ignition isolation cover and the detection container 1. The frame 24 fixes the detection container 1 and is detachably sealed to the ignition isolation cover, such as a lock connection, a quick-release connection, etc.

[0041] The ignition isolation cover may be provided with a sub-control terminal, which is used to receive information from the electronic ignition head 15, the combustible gas concentration detection device 16, the micro-flow detection device 19, and the second flame sensor 22, and send it to the controller 25, or send instructions from the controller 25 to the electronic ignition head 15, the combustible gas concentration detection device 16, and the micro-flow detection device 19. The communication between the sub-control terminal and the controller 25 can be wired or wireless.

[0042] 3. Controller

[0043] like Figure 5 As shown, the controller 25 controls the combustible gas intake device 3, the pressure measuring device 8, the electronic ignition head 15, the combustible gas concentration detection device and the micro-flow monitoring device respectively, and the controller 25 receives the sensing information of the micro-pressure difference sensor 12, the first flame sensor 13 and the second flame sensor 22 respectively.

[0044] The controller 25 controls each of the above devices to perform the following multiple tests:

[0045] Test 1: Breathing valve opening pressure test

[0046] The combustible gas intake device 3 is closed, the pressure measuring device 8 is opened, and the positive / negative pressure axial flow fan 10 supplies gas to the detection container 1, so that the pressure in the detection container 1 slowly rises. When gas is continuously discharged from the outlet of the fire-arresting breathing valve 2, it is considered that the positive pressure valve disc of the breathing valve is open. The controller 25 reads the data of the micro-pressure differential sensor 12 at this time, which is the positive pressure opening pressure of the fire-arresting exhalation valve.

[0047] When the controller 25 operates the positive / negative pressure axial flow fan 10 to reverse and extract the gas in the detection container 1, the pressure in the detection container 1 drops. When air is continuously inhaled at the outlet of the breathing valve, it is considered that the negative pressure valve disc of the breathing valve is open. The controller 25 reads the data of the micro-pressure difference sensor 12 at this time, which is the negative pressure opening pressure of the breathing valve.

[0048] The above process can be repeated for multiple measurements to ensure measurement accuracy. When detecting the discharge or inhalation of gas from the outlet of the fire-blocking breathing valve 2, the ignition protection cover can be removed or the detection instrument can be inserted into the vent 23.

[0049] Test 2: Breathing valve flow test

[0050] After starting the pressure test, the positive / negative pressure axial flow fan 10 is controlled to further increase the fan speed until the air flow collected by the gas flow rate sensor 11 reaches the detection rated flow specified by industry regulations. At this time, the controller 25 collects the value of the micro-pressure differential sensor 12, which is the operating pressure of the flame-blocking breathing valve 2.

[0051] When the positive / negative pressure axial flow fan 10 is in the negative pressure state, the vacuum flow test method is the same as the breathing valve flow test method under positive pressure. It should be noted that the vacuum rated flow of the fire-blocking breathing valve 2 is 50% of the exhalation rated flow.

[0052] Test 3: Explosion resistance test

[0053] The ignition isolation cover 14 needs to be in an installed state, and the vent 23 is sealed with a plastic bag to make the ignition isolation cover 14 sealed.

[0054] The combustible gas concentration detection device 16 on the ignition isolation cover 14 is opened, and the micro-flow detection device 19 is closed.

[0055] Open the combustible gas inlet device 3. According to the set ratio, the combustible gas flow meter 4 and the dilution gas flow meter 6 respectively feedback the flow conditions of the two gases. The controller 25 adjusts the opening and closing degrees of the combustible gas solenoid valve 5 and the dilution gas solenoid valve 7 according to the flow conditions of the two gases, so that the combustible gas entering the detection container 1 reaches the set concentration.

[0056] When the combustible gas concentration sensor 18 on the ignition isolation cover 14 detects that the concentration of the discharged combustible gas reaches the detection concentration, such as the experimental concentration of propane is 4.3%±0.2%, the combustible gas intake device 3 and the combustible gas concentration detection device 16 are closed. At this time, the combustible gas concentration in the ignition isolation cover 14 reaches the detection concentration.

[0057] Controller 25 controls electronic ignition head 15 on ignition isolation cover 14 to energize and ignite. Combustible gas explodes within the isolation cover, rupturing the plastic bag in vent 23 and releasing pressure. When an explosion occurs, both first flame sensor 13 and second flame sensor 22 detect the presence of a flame. If first flame sensor 13 detects no flame and second flame sensor 22 detects flame, the flame arrester is considered to have successfully blocked the fire.

[0058] After the experiment is completed, open the pressure measuring gas device 8 for purging. After the purging is completed, repeat the test. If the test is repeated 13 times and the fire is successfully blocked each time, the flame arrester under test can be considered to have qualified explosion-proof performance.

[0059] Test 4: Sealing test

[0060] After the explosion resistance test, the combustible gas inlet device 3 and the combustible gas concentration detection device 16 on the ignition isolation cover 14 are closed, the pressure measuring device 8 and the small flow detection device 19 on the ignition isolation cover 14 are opened, and the vent 23 is sealed.

[0061] Controller 25 operates the positive / negative pressure axial flow fan 10 to slowly increase the pressure in the detection container 1 until the reading of the micro-pressure differential sensor 12 reaches 75% of the opening pressure of the fire-blocking breathing valve 2. Maintaining this pressure, controller 25 collects micro-flow data from micro-flow sensor 21. If this micro-flow data is less than the industry standard, the breathing valve is considered to have a qualified seal. The negative pressure test method is the same as the positive pressure test. Simply reverse the fan to reduce the mixing chamber pressure to 75% of the negative pressure opening pressure of the breathing valve. Controller 25 collects micro-flow data from micro-flow sensor 21. If this micro-flow data is less than the standard, the sealing performance is considered to be qualified.

[0062] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, such modifications or improvements, without departing from the spirit of the present invention, are within the scope of protection claimed herein.

Claims

1. A fire-retardant breathing valve testing device, used to test various properties of fire-retardant breathing valves, characterized by: It includes a detection container, an ignition isolation cover and a controller. The opening of the detection container is connected to the flame-blocking breathing valve. The detection container is connected to the combustible gas intake device and the pressure measuring device. The detection container is provided with a micro-pressure differential sensor and a first flame sensor. The ignition isolation cover sealing cover is on the outside of the flame-blocking breathing valve, and the ignition isolation cover is provided with an electronic ignition head, a combustible gas concentration detection device, a micro-flow detection device, a second flame sensor, and a vent; The controller controls the combustible gas intake device, the pressure measuring device, the electronic ignition head, the combustible gas concentration detection device and the micro-flow monitoring device respectively, and receives sensing information from the micro-pressure difference sensor, the first flame sensor and the second flame sensor respectively.

2. A fire-retardant breathing valve detection device according to claim 1, characterized in that: The combustible gas intake device includes a combustible gas intake pipe and a dilution gas intake pipe for introducing non-combustible gas. The combustible gas intake pipe is provided with a combustible gas flow meter and a combustible gas solenoid valve. The dilution gas intake pipe is provided with a dilution gas flow meter and a dilution gas solenoid valve. The combustible gas flow meter, combustible gas solenoid valve, dilution gas flow meter, and dilution gas solenoid valve are all connected to a controller.

3. The fire-retardant breathing valve detection device according to claim 1, characterized in that: The pressure measuring gas device includes a pressure measuring gas pipe, on which a pressure measuring gas solenoid valve, a positive / negative pressure axial flow fan and a gas flow rate sensor are provided. The pressure measuring gas solenoid valve, the positive / negative pressure axial flow fan and the gas flow rate sensor are all connected to a controller.

4. The fire-retardant breathing valve detection device according to claim 1, characterized in that: The combustible gas concentration detection device and the micro-flow detection device are both arranged on the top of the ignition isolation cover.

5. A fire-retardant breathing valve detection device according to claim 1 or 4, characterized in that: The combustible gas concentration detection device includes a combustible gas outlet pipe connected to the ignition isolation cover, and the combustible gas outlet pipe is provided with a combustible gas outlet electromagnetic valve and a combustible gas concentration sensor. The combustible gas outlet electronic valve and the combustible gas concentration sensor exchange information with the controller.

6. A fire-retardant breathing valve detection device according to claim 1 or 4, characterized in that: The micro-flow detection device includes a micro-flow outlet pipe connected to the ignition isolation cover, and the micro-flow outlet pipe is provided with a micro-flow solenoid valve and a micro-flow sensor. The micro-flow solenoid valve and the micro-flow sensor both exchange information with the controller.

7. The fire-retardant breathing valve detection device according to claim 1, characterized in that: The ignition isolation cover is provided with a plurality of electronic ignition heads evenly distributed from top to bottom, so as to achieve even combustion of the combustible gas in the ignition isolation cover.

8. The fire-retardant breathing valve detection device according to claim 1, characterized in that: A frame is provided between the ignition isolation cover and the detection container. The frame fixes the detection container, and the frame and the ignition isolation cover are detachably and sealedly connected.

9. The fire-retardant breathing valve detection device according to claim 1, characterized in that: An observation window is provided on the ignition isolation cover.

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