A valve tightness detection device for fire extinguishers

Abstract

The utility model discloses a fire extinguisher valve leakproofness detection equipment relates to fire fighting equipment detection technical field, the equipment includes sealed cabinet body, depresses the basket system, negative pressure generating system and bubble laser detection system, sealed cabinet body adopts the inflation sealing strip to guarantee leakproofness, depresses the basket system through the lift mechanism drive depresses the basket and will multiple fire extinguisher press into the water simultaneously, and negative pressure generating system creates the negative pressure environment in the cabinet, and promotes the bubble of leak place to produce, and bubble laser detection system detects the bubble through the laser detection grid automatically, the utility model discloses realized the batch automation detection of fire extinguisher valve leakproofness, has the advantages such as high detection sensitivity, result is intuitive and reliable, can accurately position leak point, effectively solved the problem of low efficiency, poor accuracy of traditional detection method.

Description

Technical Field

[0001] This utility model relates to the field of fire equipment testing technology, and in particular to an automated device for testing the sealing performance of fire extinguisher valves. Background Technology

[0002] As an important fire safety device, the sealing performance of a fire extinguisher directly affects its effectiveness and safety. As a key component of a fire extinguisher, the valve's insufficient sealing performance can lead to extinguishing agent leakage and pressure drop, thus preventing it from spraying properly when needed and creating safety hazards. Currently, the main methods for testing the sealing performance of fire extinguisher valves are the water immersion bubble method or the pressure drop method. The traditional water immersion bubble method requires operators to immerse the fire extinguisher in a water tank and rely on visual observation to determine whether there is a leak by observing whether bubbles are generated. This method is inefficient, relies entirely on manual judgment, and is prone to misjudgment or missed judgment due to visual fatigue, and it cannot achieve quantitative detection. Although the pressure drop method can achieve automated detection, it is not sensitive enough to detect minor leaks, and the test results are easily affected by changes in ambient temperature, resulting in insufficient accuracy. Therefore, there is an urgent need in this field for a fire extinguisher valve sealing test device that can achieve automated operation, high detection sensitivity, intuitive and reliable results, and can accurately locate the leak point. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fire extinguisher valve sealing test device. This device can achieve batch automated testing and has the advantages of high detection sensitivity, intuitive and reliable results, and accurate location of leakage points.

[0004] To solve the above problems, this utility model provides a fire extinguisher valve sealing test device, characterized in that it includes a sealing cabinet, a control system, a pressure basket system, a negative pressure generating system and a bubble laser detection system; The sealed cabinet includes a pressure-bearing cabinet shell and a cabinet door; the sealed cabinet is also equipped with an emergency pressure relief valve and a vacuum sensor, which are electrically connected to the control system; the cabinet door is also equipped with a door control switch, which is electrically connected to the control system. The pressure basket system is installed inside the sealed cabinet and includes a water tank, a fire extinguisher positioning base located inside the water tank, a pressure basket, and a lifting mechanism; the lifting mechanism is installed on the inner wall of the sealed cabinet and is used to control the lifting and lowering of the pressure basket within the water tank cavity; The negative pressure generating system includes a vacuum pump, which is connected to the internal space of the sealed cabinet through a vacuum pipeline; The bubble laser detection system includes multiple sets of through-beam laser sensors. The transmitting and receiving ends of the through-beam laser sensors are respectively located on opposite sides of the water tank, and all laser beams are located on the same horizontal plane inside the water tank, forming a laser detection grid.

[0005] Furthermore, this utility model provides a fire extinguisher valve sealing test device, wherein the lower pressure basket includes a basket frame and multiple pressing beams disposed within the basket frame, and multiple rubber gaskets are disposed on the pressing beams.

[0006] Furthermore, this utility model provides a fire extinguisher valve sealing performance testing device, wherein the lifting mechanism includes a servo electric cylinder and four guide optical shafts. The cylinder body of the servo electric cylinder is fixed to the top of the sealing cabinet, and its piston rod is connected downward to the top center of the lower pressure basket. The four guide optical shafts are respectively vertically arranged at the four corners of the lower pressure basket, and the guide optical shafts are connected to the sealing cabinet through linear bearings.

[0007] Furthermore, this utility model provides a fire extinguisher valve sealing test device, wherein the partitions of the laser detection grid correspond to the positions of the fire extinguisher positioning base, and the control system can determine the specific fire extinguisher that is leaking based on the position where the laser signal is blocked.

[0008] The fire extinguisher valve sealing performance testing device proposed in this application has the following advantages compared with the prior art: 1. Achieve automated batch testing: By setting up a pressure basket system, multiple fire extinguishers can be pressed into the water for testing at the same time, which greatly improves testing efficiency and reduces the intensity of manual operation; 2. High detection sensitivity: The negative pressure generation system creates a negative pressure environment inside the sealed cabinet, which increases the pressure difference between the inside and outside of the fire extinguisher. Even a very small leak will produce obvious bubbles, which greatly improves the detection sensitivity. 3. Intuitive and reliable results: The bubble laser detection system automatically detects bubbles in the water, avoiding the subjectivity of manual judgment, and the detection results are more objective and reliable; 5. High safety: Multiple safety measures, such as door control switches and emergency pressure relief valves, ensure the safety of equipment operation. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of a fire extinguisher valve sealing performance testing device according to the present invention; Figure 2 This is a schematic diagram of the internal structure of a fire extinguisher valve sealing performance testing device according to the present invention; Figure 3 for Figure 2 Schematic diagram of the structure with changing perspective.

[0010] The components include: 1. Sealed cabinet; 2. Water tank; 3. Fire extinguisher positioning base; 4. Basket frame; 5. Pressing beam; 6. Rubber gasket; 7. Cabinet door; 8. Servo electric cylinder; 9. Guide optical axis; 10. Laser sensor. Detailed Implementation

[0011] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0012] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0013] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0014] like Figures 1-3 As shown, this embodiment provides a fire extinguisher valve sealing test device, which includes a sealing cabinet 1, a control system, a pressure basket system, a negative pressure generating system and a bubble laser detection system; The sealed cabinet 1 includes a pressure-bearing cabinet shell and a cabinet door 7; the sealed cabinet 1 is also equipped with an emergency pressure relief valve and a vacuum sensor, which are electrically connected to the control system; the cabinet door 7 is also equipped with a door control switch, which is electrically connected to the control system. The pressure basket system is installed inside the sealed cabinet 1, and includes a water tank 2, a pressure basket, and a lifting mechanism. The water tank 2 contains multiple fire extinguisher positioning bases 3. The lifting mechanism is installed on the inner wall of the sealed cabinet 1 to control the lifting and lowering of the pressure basket within the water tank 2. The pressure basket includes a basket frame 4 and multiple clamping beams 5 installed within the basket frame 4. Multiple rubber gaskets 6 are installed on the clamping beams 5. The lifting mechanism includes a servo electric cylinder 8 and four guide shafts 9. The cylinder body of the servo electric cylinder 8 is fixed to the top of the sealed cabinet 1, and its piston rod is connected downwards to the center of the top of the pressure basket. The four guide shafts 9 are vertically arranged at the four corners of the pressure basket, and are connected to the sealed cabinet 1 via linear bearings. The negative pressure generating system includes a vacuum pump, which is connected to the internal space of the sealed cabinet 1 through a vacuum pipeline; The bubble laser detection system includes multiple sets of through-beam laser sensors 10. The transmitting and receiving ends of the through-beam laser sensors 10 are respectively set on opposite sides of the water tank 2, and all laser beams are located on the same horizontal plane in the water tank 2, forming a laser detection grid. The partitions of the laser detection grid correspond to the positions of the fire extinguisher positioning base 3. The control system can determine the specific fire extinguisher that has leaked based on the location where the laser signal is blocked.

[0015] In actual production, it mainly includes a sealed cabinet 1, a pressure basket system, a negative pressure generating system, a bubble laser detection system, and a control system; The sealed cabinet 1 is welded from high-strength steel to ensure that it can withstand a negative pressure of one atmosphere without deformation. When the cabinet door 7 is closed, a reliable seal is formed between the cabinet door 7 and the sealed cabinet. The cabinet door 7 is also equipped with a door control switch to ensure that the equipment can only be started when the cabinet door 7 is completely closed. The pressure basket system is set inside the sealed cabinet 1. The water tank 2 is fixed to the bottom of the sealed cabinet 1 and is made of transparent acrylic material. The sealed cabinet is also equipped with a tempered glass observation window at the corresponding position to facilitate observation of the internal situation. The fire extinguisher positioning base 3 is set at the bottom of the water tank 2 to position the bottom of the fire extinguisher. The pressure basket includes a basket frame 4 and multiple pressing beams 5 set in the frame. Multiple rubber pads 6 are set on the pressing beams 5. The lifting mechanism includes a servo electric cylinder 8 and four guide optical shafts 9; the cylinder body of the servo electric cylinder 8 is fixed to the top of the sealed cabinet 1, and the piston rod is connected downward to the top center of the lower pressure basket; the four guide optical shafts 9 are respectively set at the four corners of the lower pressure basket and connected to the sealed cabinet 1 through linear bearings to ensure that the lower pressure basket is lifted and lowered smoothly. The negative pressure generating system includes a vacuum pump, vacuum pipeline, vacuum filter and vacuum solenoid valve; the vacuum pump is connected to the internal space of the sealed cabinet 1 through the vacuum pipeline, and is used to extract air from the cabinet to create a negative pressure environment; The bubble laser detection system includes multiple sets of through-beam laser sensors 10. The transmitting and receiving ends of these sensors are respectively set on opposite sides of the water tank 2. All laser beams are located on the same horizontal plane, forming a dense laser detection grid. The partitions of the laser detection grid correspond to the positions on the fire extinguisher positioning base 3. The sealed cabinet 1 is also equipped with an emergency pressure relief valve and a vacuum sensor, which are used for emergency pressure relief and monitoring the vacuum level inside the cabinet, respectively. The control system uses a PLC controller, which is electrically connected to the negative pressure generating system, the bubble laser detection system, the lifting mechanism, and other sensors and actuators.

[0016] Work process: The operator opens cabinet door 7 and places multiple fire extinguishers into their respective fire extinguisher positioning bases 3 in water tank 2; then closes cabinet door 7 and initiates the detection program through the control system. The servo electric cylinder 8 of the lifting mechanism drives the lower basket to descend, and the rubber pads 6 press the top of each fire extinguisher to completely immerse it in water; the vacuum pump starts and extracts air from the sealed cabinet 1 through the vacuum pipeline. When the vacuum sensor detects that the vacuum level inside the cabinet has reached the preset value, the vacuum pump stops working and the system enters the pressure holding detection stage. During the pressure holding period, if a fire extinguisher valve leaks, the gas inside will escape through the leak and form bubbles in the water. When the bubbles rise and pass through the laser detection grid, they will block the laser beam. The control system can determine whether a leak has occurred by monitoring the changes in the laser signal, and determine which fire extinguisher has leaked based on the specific location where the signal is blocked. After the test is completed, the emergency pressure relief valve is opened to balance the pressure inside and outside the cabinet. Then, the lifting mechanism drives the lower pressure basket to rise, and the operator opens cabinet door 7 to take out the fire extinguisher.

[0017] Any aspects not detailed in this application are well-known to those skilled in the art.

[0018] The preferred embodiments of this application have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this application without inventive effort. Therefore, any technical solutions that can be obtained by those skilled in the art based on the concept of this application through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A fire extinguisher valve sealing performance testing device, characterized in that, It includes a sealed cabinet, a control system, a pressure basket system, a negative pressure generating system, and a bubble laser detection system; The sealed cabinet includes a pressure-bearing cabinet shell and a cabinet door; the sealed cabinet is also equipped with an emergency pressure relief valve and a vacuum sensor, which are electrically connected to the control system; the cabinet door is also equipped with a door control switch, which is electrically connected to the control system. The pressure basket system is installed inside the sealed cabinet and includes a water tank, a pressure basket and a lifting mechanism. The water tank is equipped with multiple fire extinguisher positioning bases, and the lifting mechanism is installed on the inner wall of the sealed cabinet to control the lifting and lowering of the pressure basket within the water tank. The negative pressure generating system includes a vacuum pump, which is connected to the internal space of the sealed cabinet through a vacuum pipeline; The bubble laser detection system includes multiple sets of through-beam laser sensors. The transmitting and receiving ends of the through-beam laser sensors are respectively located on opposite sides of the water tank, and all laser beams are located on the same horizontal plane inside the water tank, forming a laser detection grid.

2. The fire extinguisher valve sealing performance testing device according to claim 1, characterized in that, The pressure basket includes a basket frame and multiple pressing beams disposed within the basket frame, with multiple rubber pads disposed on the pressing beams.

3. The fire extinguisher valve sealing performance testing device according to claim 1, characterized in that, The lifting mechanism includes a servo electric cylinder and four guide optical shafts. The cylinder body of the servo electric cylinder is fixed to the top of the sealed cabinet, and its piston rod is connected downward to the top center of the lower pressure basket. The four guide optical shafts are respectively vertically arranged at the four corners of the lower pressure basket, and the guide optical shafts are connected to the sealed cabinet through linear bearings.

4. The fire extinguisher valve sealing performance testing device according to claim 1, characterized in that, The partitions of the laser detection grid correspond to the positions of the fire extinguisher positioning base, and the control system can determine the specific fire extinguisher that is leaking based on the location where the laser signal is blocked.

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