A multifunctional integrated fire extinguisher valve durability test device

Abstract

The present invention provides a multifunctional, integrated fire extinguisher valve durability test device, comprising a control unit and its signal-connected trolley-type CO2 fire extinguisher valve test unit, a portable fire extinguisher valve test unit, a trolley-type fire extinguisher low-pressure valve test unit, and an air-tightness test unit. The trolley-type CO2 fire extinguisher valve test unit is used to test the durability of the trolley-type CO2 fire extinguisher valve, the portable fire extinguisher valve test unit is used to test the durability of the portable fire extinguisher valve, the trolley-type fire extinguisher low-pressure valve test unit is used to test the durability of the trolley-type fire extinguisher low-pressure valve, and the air-tightness test unit is used to test the air-tightness of the trolley-type fire extinguisher low-pressure valve and the portable fire extinguisher valve after the durability test. This multifunctional, integrated fire extinguisher valve durability test device integrates multiple functions into one device, has a high degree of automation, and can greatly improve the efficiency of valve durability testing.

Description

Technical Field

[0001] The invention belongs to the field of valve detection, and in particular relates to a multifunctional integrated fire extinguisher valve durability test device. Background Art

[0002] Valves are key components of fire extinguishers subject to mandatory certification, controlling the release of extinguishing agent. Valve durability is a crucial indicator of valve reliability. Performance requirements for fire extinguisher valve durability are set forth in Appendix C.2.10 of the newly released mandatory national standard for fire extinguishers, GB 4351-2023 "Portable Fire Extinguishers," Clause A.2.8 of GB 8109-2023 "Trolley-Type Fire Extinguishers," and Clause 5.3.6 of GB / T 15382-2021 "General Technical Requirements for Gas Cylinder Valves," referenced in Clause 6.2.5 of GB8109-2023 "Trolley-Type Fire Extinguishers." According to national standards, valves for portable fire extinguishers and trolley-type fire extinguishers with a maximum working pressure not exceeding 2.5 MPa must undergo an airtightness test after 500 cycles of full-stroke opening and closing at maximum working pressure. No leakage or rupture should be observed. However, due to the higher maximum working pressure of cart-type CO2 fire extinguisher valves, the national standard has additional regulations: According to the test method in Section 6.11 of GB / T 15382-2021, "General Technical Requirements for Gas Cylinder Valves," the valve must be able to operate normally and meet airtightness requirements after 2000 cycles of opening and closing at the durability torque under the test pressure. In summary, the national standard's requirements for fire extinguisher valve durability testing are mainly divided into three parts: the durability test for portable fire extinguisher valves, the low-pressure valve for cart-type fire extinguishers with a maximum working pressure of no more than 2.5 MPa, and the valve for cart-type CO2 fire extinguishers. These three durability tests require different testing equipment. While the standard requirements for portable fire extinguisher valves and cart-type fire extinguisher valves with a maximum working pressure of no more than 2.5 MPa are similar, requiring only 500 cycles of opening and closing, the valve structures are different and require two sets of workstations to perform the test. Each opening and closing cycle of a cart-mounted CO2 fire extinguisher valve requires specific opening and closing torque and pressure determination, placing high demands on the equipment's station structure and automation level. Current technology often requires three pieces of equipment to conduct durability tests for these three types of fire extinguisher valves. The valve under test must be mounted on a separate, dedicated device, and then the valve opening and closing cycles must be repeated. After the cycles are complete, an airtightness test must be performed on another device to complete the entire durability test. Consequently, existing fire extinguisher valve durability testing equipment has a low level of automation and integration, hindering valve testing efficiency. Summary of the Invention

[0003] In view of this, the present invention aims to propose a multifunctional integrated fire extinguisher valve durability test device to solve the problems of low automation, low integration level and low detection efficiency of existing equipment durability testing equipment.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A multifunctional integrated fire extinguisher valve durability test device includes a machine platform and a cart-type carbon dioxide fire extinguisher valve test unit, a portable fire extinguisher valve test unit, a cart-type fire extinguisher low-pressure valve test unit, an airtightness test unit and a control unit installed above it.

[0006] The trolley-type CO2 fire extinguisher valve test unit is used to test the durability of the trolley-type CO2 fire extinguisher valve.

[0007] The portable fire extinguisher valve test unit is used to test the durability of portable fire extinguisher valves.

[0008] The trolley fire extinguisher low pressure valve test unit is used to test the durability of the trolley fire extinguisher low pressure valve.

[0009] The air tightness test unit is used to test the air tightness of trolley fire extinguisher valves and portable fire extinguisher valves after completing the durability test;

[0010] The control unit is used to control the action logic of the carbon dioxide fire extinguisher valve test unit, portable fire extinguisher valve test unit, trolley-type fire extinguisher low-pressure valve test unit, and air tightness test unit.

[0011] Furthermore, the cart-type carbon dioxide fire extinguisher valve test unit includes a torque transmission mechanism, the bottom of the torque transmission mechanism is connected to the handwheel of the No. 1 tested valve through the No. 1 tooling, so that the torque transmission mechanism is centered when applying torque to the No. 1 tested valve; the No. 1 tested valve is also provided with an air inlet for pressurization, and the air outlet of the No. 1 tested valve is connected to the atmosphere through a high-pressure pipe, a pressure determination mechanism, and an electromagnetic exhaust valve in sequence, and the pressure determination mechanism is used to identify pressure rise and pressure drop; the torque transmission mechanism, the pressure determination mechanism, and the electromagnetic exhaust valve are respectively connected to the control unit.

[0012] Furthermore, the torque transmission mechanism includes a shell, a torque sensor and a rotating motor are installed above the shell, the rotating motor can drive the shell to rotate, one side of the rotating motor is connected to a transmission mechanism, the transmission mechanism can drive the rotating motor to move up and down, and the torque sensor, rotating motor and transmission mechanism are all connected to the control unit.

[0013] Furthermore, the No. 1 tooling is a disc structure with a plum blossom-shaped groove inside, and a guide column cooperating with the torque transmission mechanism is provided on the side close to the torque transmission mechanism; the groove of the No. 1 tooling is used to embed the handwheel.

[0014] Furthermore, the portable fire extinguisher valve test unit includes a support column and a pneumatic telescopic mechanism installed above it, the pneumatic telescopic mechanism is used to open and close the No. 2 tested valve, and the No. 2 tooling is located below the pneumatic telescopic mechanism and is used to fix the No. 2 tested valve.

[0015] Furthermore, the support column is an inverted L-shaped structure, with the bottom installed on the machine table and a positioning plate with a slide groove installed on the top. The pneumatic telescopic mechanism is provided with a slider that is slidably connected to the slide groove, and the slider and the slide groove are fixed by a rotating locking mechanism.

[0016] Furthermore, the pneumatic telescopic mechanism includes a main body, which is provided with a screw hole for passing through the rotary retraction mechanism; the outer side of the main body is connected to the positioning plate through a rotary locking mechanism, and a pneumatic push rod is installed inside the main body, with an air supply port provided on one side, and a push block is fixedly installed under the pneumatic push rod. Under the action of the air source, the pneumatic push rod can push the push block to reciprocate in the vertical direction.

[0017] Furthermore, the trolley-type fire extinguisher low-pressure valve test unit includes a support frame and a No. 2 pneumatic telescopic mechanism installed above it, and the position of the No. 2 pneumatic telescopic mechanism is adjustable; the fixed end of the No. 2 pneumatic telescopic mechanism can also rotate relative to the support frame, and the movable end can rotate relative to the No. 3 tooling, and the No. 3 tooling is used to open and close the No. 3 tested valve.

[0018] Furthermore, a No. 2 positioning plate is installed above the support frame, and a slide is fixedly installed on the No. 2 positioning plate. The slide is connected to the fixed end of the No. 2 pneumatic telescopic mechanism through a No. 2 rotary locking mechanism, which is used to adjust the distance between the No. 2 pneumatic telescopic mechanism and the support frame; the movable end of the No. 2 pneumatic telescopic mechanism is connected to the No. 3 tooling through a No. 2 connecting piece, and the fixed end of the No. 2 pneumatic telescopic mechanism can rotate relative to the support frame, and the movable end of the No. 2 pneumatic telescopic mechanism can rotate relative to the No. 3 tooling; the No. 3 tooling is hinged to the operating rod of the No. 3 tested valve below.

[0019] Furthermore, the air tightness test unit includes an upper cover and a test tank, an observation cover, and a tooling arranged above it. The tooling is used to install the valve to be tested, the observation cover is used to observe the test conditions of the valve to be tested in the cover, and the top is used to pour liquid into the test tank; the bottom of the upper cover is sealed with the lower cover.

[0020] Compared with the prior art, the multifunctional integrated fire extinguisher valve durability test device of the present invention has the following advantages:

[0021] (1) The multifunctional integrated fire extinguisher valve durability test device of the present invention integrates the automatic opening and closing cycle stations and air tightness stations of different fire extinguisher valves into one set of equipment, which has a high degree of automation and integration, and greatly improves the durability testing efficiency of the valves.

[0022] (2) The multifunctional integrated fire extinguisher valve durability test device of the present invention can directly install the tested valve in the air tightness test unit for air tightness test after the low-pressure valve of the cart-type fire extinguisher and the valve of the portable fire extinguisher have completed the durability test, thereby shortening the test detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 Schematic diagram of a multifunctional integrated fire extinguisher valve durability test device according to an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of a cart-type carbon dioxide fire extinguisher valve test unit according to an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of a portable fire extinguisher valve test unit according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of a low-pressure valve test unit for a cart-type fire extinguisher according to an embodiment of the present invention.

[0028] Figure 5 Schematic diagram of the airtightness test unit according to an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1-Torque transmission mechanism; 2-Tooling No. 1; 3-Handwheel; 4-Valve No. 1 to be tested; 5-Air outlet; 6-Air inlet; 7-Charging port No. 1; 8-High-pressure pipe; 9-Pressure determination mechanism; 10-Solenoid exhaust valve; 11-Base No. 1; 12-Support column; 13-Positioning plate; 14-Rotation and retraction mechanism; 15-Pneumatic telescopic mechanism; 16-Pneumatic push rod; 17-Push block; 18-Handle; 19-Valve No. 2 to be tested; 20-Tooling No. 2; 21-Base No. 2; 22-Charging port No. 2; 23-Air supply port; 24-Support frame; 25-Positioning plate No. 2; 26-Rotation locking mechanism No. 2; 27 - Slide plate; 28- Connecting piece No. 1; 29- Pneumatic telescopic mechanism No. 2; 30- Air inlet No. 2; 31- Push rod; 32- Connecting piece No. 2; 33- Tooling No. 3; 34- Operating lever; 35- Tested valve No. 3; 36- Base No. 3; 37- Pressure charging port No. 3; 38- Observation cover; 39- Upper cover; 40- Lower cover; 41- Base No. 4; 42- Pressure charging port No. 4; 43- Tooling; 44- Tested valve; 45- Trolley-type CO2 fire extinguisher valve test unit; 46- Portable fire extinguisher valve test unit; 47- Trolley-type fire extinguisher low-pressure valve test unit; 48- Air tightness test unit. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0035] A multifunctional integrated fire extinguisher valve durability test device, such as Figures 1 to 5 As shown, the apparatus includes a platform and a cart-type CO2 fire extinguisher valve test unit 45, a portable fire extinguisher valve test unit 46, a cart-type fire extinguisher low-pressure valve test unit 47, an air tightness test unit 48, and a control unit installed above it. The cart-type CO2 fire extinguisher valve test unit 45 is used to test the durability of the cart-type CO2 fire extinguisher valve, the portable fire extinguisher valve test unit 46 is used to test the durability of the portable fire extinguisher valve, the cart-type fire extinguisher low-pressure valve test unit 47 is used to test the durability of the cart-type fire extinguisher low-pressure valve, and the air tightness test unit 48 is used to test the air tightness of the cart-type fire extinguisher low-pressure valve and portable fire extinguisher valve after completing the durability test. The control unit is used to control the operating logic of the cart-type CO2 fire extinguisher valve test unit, the portable fire extinguisher valve test unit, the cart-type fire extinguisher low-pressure valve test unit, and the air tightness test unit. The control unit is a single-chip microcomputer or a programmable logic controller.

[0036] The trolley-type carbon dioxide fire extinguisher valve test unit 1 includes a torque transmission mechanism 1, a No. 1 tooling 2, a No. 1 charging port 7, a high-pressure pipe 8, a pressure determination mechanism 9, an electromagnetic exhaust valve 10 and a No. 1 base 11. The air inlet 6 of the No. 1 tested valve 4 is installed on the machine through the No. 1 base 11, and the No. 1 base 11 is provided with a No. 1 charging port 7, which is used to pressurize the air inlet 6 (nitrogen or air); the air outlet 5 of the No. 1 tested valve 4 is connected to the atmosphere through the high-pressure pipe 8, the pressure determination mechanism 9, and the electromagnetic exhaust valve 10 in sequence, and the pressure determination mechanism 9 is used to identify pressure rise and pressure drop; a handwheel 3 is provided above the No. 1 tested valve 4, and the handwheel 3 is fixedly connected to the torque transmission mechanism 1 above the No. 1 tooling 2, so that the torque transmission mechanism 1 has a neutral position when applying torque to the No. 1 tested valve 4; the torque transmission mechanism 1, the pressure determination mechanism 9, and the electromagnetic exhaust valve 10 are respectively connected to the control unit for signal.

[0037] The pressure determination unit 9 is a pressure sensor.

[0038] In one or more embodiments, the torque transmission mechanism 1 includes a housing adapted for use with tool No. 1 2, with a torque sensor and a rotary motor mounted above the housing. The rotary motor is capable of rotating the housing, one side of the rotary motor is connected to a transmission mechanism, and the transmission mechanism is capable of driving the rotary motor to reciprocate up and down. Signals from the torque sensor, rotary motor, and transmission mechanism are all connected to a control unit. The transmission mechanism can be a combination of a conveyor belt and a motor, or a combination of a sprocket and a motor, that can achieve the above-mentioned functions.

[0039] Handwheel 3 is a plum blossom-shaped handwheel. Fixture No. 1 2 is a disc with a plum blossom-shaped groove inside. A matching guide post is located on the side near torque transmission mechanism 1. The groove of fixture No. 1 2 securely fits handwheel 3 of valve No. 1 under test 4, ensuring centering when torque is applied to handwheel 3. The plum blossom-shaped groove fixture is rigidly connected to torque transmission mechanism 1 to ensure reliable torque transmission while also maintaining axial freedom.

[0040] In one or more embodiments, the pressure determination mechanism 9 and the electromagnetic exhaust valve 10 are fixedly mounted on the machine table through a bracket.

[0041] Specifically, the connections between the air outlet 5 of the first tested valve 4 and the high-pressure pipe 8, the air inlet 6 and the first base 11, the high-pressure pipe 8 and the pressure determination mechanism 9, and the pressure determination mechanism 9 and the electromagnetic exhaust valve 10 should be sealed.

[0042] The experimental process of the cart-type carbon dioxide fire extinguisher valve test unit is as follows:

[0043] When conducting a durability test of a cart-type carbon dioxide fire extinguisher valve according to the standard GB / T 15382-2021 "General Technical Requirements for Gas Cylinder Valves", close the electromagnetic exhaust valve 10. Since the No. 1 tooling 2 is fixedly connected to the torque transmission mechanism 1, the No. 1 tooling 2 is raised axially upward by the torque transmission mechanism 1, and the No. 1 tested valve 4 is installed on the No. 1 base 11. Then, by moving the No. 1 tooling 2 up and down and rotating it, the No. 1 tooling 2 is embedded in the plum blossom-shaped handwheel 3 of the tested valve, and nitrogen or air is filled into the No. 1 pressure charging port 7 to the test pressure P of the tested valve. VT (P VT The test preparation is complete. The cart-type CO2 fire extinguisher valve test unit 1 of this equipment can automatically perform the opening and closing cycle test 2000 times according to the cycle steps S1-S6 of the standard GB / T 15382-2021:

[0044] S1. When the durability test starts, the control unit controls the torque transmission mechanism 1 through the torque T e,start (T e,start (determined by standard GB / T 15382-2021) Close the first valve under test 4;

[0045] S2. Maintain for 6 seconds. The pressure determination mechanism 9 transmits the data information to the control unit. When the pressure drop detected by the pressure determination mechanism 9 exceeds 1 MPa, the first tested valve 4 is judged to be unqualified and the cycle is terminated. If the pressure drop does not exceed 1 MPa, the valve passes and the cycle continues.

[0046] S3, the control unit controls the electromagnetic exhaust valve 10 to open;

[0047] S4, maintain for 6s, if the pressure determination mechanism 9 recognizes that the pressure rise exceeds 0.5MPa, the control unit controls the torque transmission mechanism 1 to continue to increase the torque, when the torque exceeds T e,end (T e,end (determined by standard GB / T15382-2021), the first tested valve 4 is judged to be unqualified and the cycle is terminated. If the pressure determination mechanism 9 recognizes that the pressure rise does not exceed 0.5MPa, it is qualified and the cycle continues;

[0048] S5, the torque transmission mechanism 1 opens the tested valve 4 No. 1;

[0049] S6, hold for 6 seconds.

[0050] The portable fire extinguisher valve test unit includes a support column 12, a positioning plate 13, a rotating and retracting mechanism 14, a pneumatic telescopic mechanism 15, a pneumatic push rod 16, a push block 17, a No. 2 tooling 20, a No. 2 base 21, a No. 2 charging port 22, and an air supply port 23. The support column 12 is fixedly connected to the machine table, and the pneumatic telescopic mechanism 15 is installed on the top. The pneumatic telescopic mechanism 15 is used to open and close the No. 2 tested valve 19. The No. 2 tooling 20 is located below the pneumatic telescopic mechanism 15 and is used to fix the No. 2 tested valve 19.

[0051] The structure of the second tooling 20 matches the structure of the second tested valve 19, which can be conveniently placed on the second tested valve 19. Preferably, the bottom of the second tooling 20 is connected to the machine table through the second base 21, and the second base 21 is provided with a second pressure port 22.

[0052] In one or more embodiments, the support column 12 is an inverted L-shaped structure, with the lower part installed on the machine table and the upper part installed with a positioning plate 13. The positioning plate 13 is provided with a slide groove, and the pneumatic telescopic mechanism 15 is provided with a slider that is slidably connected to the slide groove. The slider and the slide groove are fixed by a rotating locking mechanism 14, which facilitates the adjustment of the position of the pneumatic telescopic mechanism 15.

[0053] Preferably, the rotary locking mechanism 14 is a knob with threads, and the threads can pass through the pneumatic telescopic mechanism 15 and be connected to the positioning plate 13. The rotary locking mechanism 14 can be adjusted to lock the pneumatic telescopic mechanism 15 at a desired position.

[0054] In one or more embodiments, the pneumatic telescopic mechanism 15 includes a main body, a pneumatic push rod 16 and a push block 17. The main body is a shell structure and is provided with a screw hole for passing through the rotary retraction mechanism 14; the outer side of the main body is connected to the positioning plate 13 through a rotary locking mechanism 14, and the pneumatic push rod 16 is installed inside the main body. An air supply port 23 is provided on one side, and the air supply port 23 is connected to an external air source (the air intake of the air source is controlled by the control unit). The push block 17 is fixedly installed under the pneumatic push rod 16. Under the action of the air source, the pneumatic push rod 16 can push the push block 17 to reciprocate in the vertical direction.

[0055] The working process of the portable fire extinguisher valve test unit is:

[0056] Because the inlet thread specifications of the second tested valve 19 are common, it must first be installed on the matching second tooling 20 and then on the base 21. The charging port 22 is located on the base 21 and can be used to pressurize the second tested valve 19. When conducting the portable fire extinguisher valve durability test according to the standard GB 4351-2023 "Portable Fire Extinguishers," the rotating locking mechanism 14 locks the pneumatic expansion mechanism 15 to the appropriate test position. The pneumatic conditions of the pneumatic expansion mechanism 15 require an external air source. This can be supplied to the pneumatic expansion mechanism 15's air supply port 23 by an air compressor (the air compressor signal is connected to the control unit). The air is then charged to the standard pressure of the second tested valve 19 through the second charging port 22, completing the pre-test preparations. The push block 17 presses down on the second tested valve 19 to open it. When the push block 17 is raised above the pressure handle 18 of the second tested valve 19, the second tested valve 19 is closed. This station can automatically complete the opening and closing cycle of the No. 2 tested valve 19 500 times, with a frequency of 20 times per minute.

[0057] The trolley-type fire extinguisher low-pressure valve test unit includes a support frame 24, a No. 2 positioning plate 25, a No. 2 rotary locking mechanism 26, a slide plate 27, a No. 1 connecting piece 28, a No. 2 pneumatic telescopic mechanism 29, a No. 2 air inlet 30, a push rod 31, a No. 2 connecting piece 32, a No. 3 tooling 33, a No. 3 base 36 and a No. 3 charging port 37. The lower part of the support frame 24 is fixed to the machine table, and the No. 2 pneumatic telescopic mechanism 29 is installed on the upper part, and the position of the No. 2 pneumatic telescopic mechanism 29 is adjustable; the fixed end of the No. 2 pneumatic telescopic mechanism 29 can also rotate relative to the support frame 24, and the movable end can rotate relative to the No. 3 tooling 33. The No. 3 tooling 33 is used to open and close the No. 3 tested valve 35.

[0058] In one or more embodiments, a No. 2 positioning plate 25 is installed above the support frame 24, and a slide 27 is fixedly installed on the No. 2 positioning plate 25. The slide 27 is connected to the fixed end of the No. 2 pneumatic telescopic mechanism 29 through a No. 2 rotary locking mechanism 26, which is used to adjust the distance between the No. 2 pneumatic telescopic mechanism 29 and the support frame 24; the movable end of the No. 2 pneumatic telescopic mechanism 29 is connected to the No. 3 tooling 33 through the No. 2 connecting piece 32, and the No. 1 connecting piece 28 and the No. 2 connecting piece 32 are both U-shaped parts, so the fixed end of the No. 2 pneumatic telescopic mechanism 29 can rotate relative to the support frame, and the movable end of the No. 2 pneumatic telescopic mechanism 29 can rotate relative to the No. 3 tooling 33; the No. 3 tooling 33 is hinged to the operating rod 34 of the No. 3 tested valve 35 below. When the No. 2 pneumatic telescopic mechanism 29 moves, the push rod 31 will rotate through the No. 2 connecting piece 32, thereby driving the No. 3 tooling 33 to rotate and compress the operating rod 34, thereby opening and closing the No. 3 tested valve 35. The third tool 33 is a rectangular block with connection holes at both ends.

[0059] Preferably, the No. 2 pneumatic telescopic mechanism 29 is a telescopic cylinder, and a No. 2 air inlet 30 is provided on one side of the telescopic cylinder 29, which is supplied with air from an external air source, and the air intake of the air source is controlled by a control unit; the movable end of the No. 2 pneumatic telescopic mechanism 29 is a push rod 31.

[0060] Preferably, the second rotation locking mechanism 26 is the same as the first rotation locking mechanism 14 .

[0061] In order to ensure the stability of the structure, the support frame 24 is an H-shaped support frame. The bottom of the third tested valve 35 is connected to the machine table through the third base 36, and the third base 36 is provided with a third pressure charging port 37.

[0062] The working process of the low-pressure valve test unit of the trolley fire extinguisher is:

[0063] When conducting a durability test of low-pressure valves on cart-type fire extinguishers with a maximum operating pressure not exceeding 2.5 MPa, according to the standard GB 8109-2023 "Trolley-Type Fire Extinguishers," the operating lever 34 of the No. 3 tested valve (35) is opened and closed by locking the slide plate 27 to the appropriate test position via the No. 2 rotary locking mechanism 26. External air is supplied by an air compressor to the No. 2 air inlet 30 of the pneumatic telescopic mechanism 29, which is then pressurized to the specified pressure of the No. 3 tested valve (35) through the No. 3 pressure charging port 37, completing pre-test preparations. When the pneumatic push rod 31 retracts, the No. 3 tested valve (35) is closed; when it extends, the No. 3 tested valve (35) is open. This station can automatically complete 500 opening and closing cycles of the No. 3 tested valve (35) at a frequency of 20 cycles per minute.

[0064] The airtightness test unit includes an upper cover 39 and a test tank arranged above it, an observation cover 38, and a tooling 43. The tooling 43 is used to install the valve 44 to be tested. The observation cover 38 is used to observe the test conditions of the valve 44 to be tested in the cover, and the top is used to pour liquid into the test tank; the bottom of the upper cover 39 is sealed with the lower cover 40.

[0065] Preferably, the lower cover 40 is connected to the machine table through a No. 4 base 41 , and a No. 4 charging port 42 is provided on the No. 4 base 41 .

[0066] In one or more embodiments, the observation cover 38 is a transparent cover, and a waterproof sealing gasket is provided between the lower cover 39 and the lower cover 40, and a notch is left for clamping with a vise. The tooling 43 should be replaceable according to the different inlet threads of the valve 44 to be tested.

[0067] According to the standards GB 8109-2023 "Trolley-Type Fire Extinguishers" and GB 4351-2023 "Portable Fire Extinguishers," durability testing for low-pressure valves on trolley-type fire extinguishers and portable fire extinguisher valves with a maximum operating pressure of no more than 2.5 MPa requires, in addition to completing 500 cycles of opening and closing, an air-tightness test. After completing the durability test, the valves can be directly installed in the air-tightness test unit for an air-tightness test. During the test, clamp the notch between the lower cover 39 and the lower cover 40 with a vise to ensure a seal between the two. Then, fill the transparent water tank from above the observation cover 38 to a level that submerges the highest point of the valve 44 by more than 50 mm. When the pressure is charged to the standard pressure through the No. 4 charging port 42, the airtightness performance of the valve 44 under test can be observed through the transparent water tank observation cover 38.

[0068] The device of this solution integrates the automatic opening and closing cycle stations and air tightness stations of three different types of fire extinguisher valves into one set of equipment. It has a high degree of automation and integration, and can greatly improve the durability detection efficiency of the valves.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multifunctional integrated fire extinguisher valve durability test device, characterized by: It includes a control unit and its signal connected cart-type carbon dioxide fire extinguisher valve test unit, a portable fire extinguisher valve test unit, a cart-type fire extinguisher low-pressure valve test unit and an airtightness test unit. The trolley-type CO2 fire extinguisher valve test unit is used to test the durability of the trolley-type CO2 fire extinguisher valve. The portable fire extinguisher valve test unit is used to test the durability of the portable fire extinguisher valve. The trolley fire extinguisher low pressure valve test unit is used to test the durability of the trolley fire extinguisher low pressure valve. The air tightness test unit is used to test the air tightness of the low-pressure valve of the trolley fire extinguisher and the valve of the portable fire extinguisher after the durability test; The control unit is used to control the action logic of the cart-type carbon dioxide fire extinguisher valve test unit, portable fire extinguisher valve test unit, cart-type fire extinguisher low-pressure valve test unit, and air tightness test unit; The cart-type carbon dioxide fire extinguisher valve test unit includes a torque transmission mechanism, the lower part of which is connected to the handwheel of the No. 1 tested valve through the No. 1 tooling, so that the torque transmission mechanism has neutrality when applying torque to the No. 1 tested valve; the No. 1 tested valve is also provided with an air inlet for pressurization, and the air outlet of the No. 1 tested valve is connected to the atmosphere through a high-pressure pipe, a pressure determination mechanism, and an electromagnetic exhaust valve in sequence, and the pressure determination mechanism is used to identify pressure rise and pressure drop; the torque transmission mechanism, the pressure determination mechanism, and the electromagnetic exhaust valve are respectively connected to the control unit, so that the cart-type carbon dioxide fire extinguisher valve test unit can It can automatically conduct an opening and closing cycle test 2,000 times; the trolley-type fire extinguisher low-pressure valve test unit includes a support frame and a No. 2 pneumatic telescopic mechanism installed above it, and the position of the No. 2 pneumatic telescopic mechanism is adjustable; the fixed end of the No. 2 pneumatic telescopic mechanism can also rotate relative to the support frame, and the movable end can rotate relative to the No. 3 tooling. The No. 3 tooling is used to open and close the No. 3 tested valve. The signal of the No. 2 pneumatic telescopic mechanism is connected to the control unit, so that the trolley-type fire extinguisher low-pressure valve test unit can automatically open and close the trolley-type fire extinguisher low-pressure valve 500 times and then directly conduct an air tightness test, wherein the opening and closing frequency is 20 times per minute; The portable fire extinguisher valve test unit includes a support column and a pneumatic telescopic mechanism installed above it. The pneumatic telescopic mechanism is used to open and close the No. 2 valve under test. The No. 2 tooling is located below the pneumatic telescopic mechanism and is used to fix the No. 2 valve under test; the air tightness test unit includes an upper cover and a test trough, an observation cover, and a tooling arranged above it. The tooling is used to install the valve under test. The observation cover is used to observe the test conditions of the valve under test in the cover, and the top is used to pour liquid into the test trough; the lower part of the upper cover is sealed with the lower cover; the signal of the pneumatic telescopic mechanism is connected to the control unit, so that the portable fire extinguisher valve test unit can automatically open and close the portable fire extinguisher valve 500 times and then directly conduct an air tightness test, where the opening and closing frequency is 20 times per minute.

2. The multifunctional integrated fire extinguisher valve durability test device according to claim 1, characterized in that: The torque transmission mechanism includes a shell, a torque sensor and a rotating motor are installed above the shell, the rotating motor can drive the shell to rotate, one side of the rotating motor is connected to the transmission mechanism, the transmission mechanism can drive the rotating motor to move up and down, and the torque sensor, rotating motor and transmission mechanism are all connected to the control unit.

3. The multifunctional integrated fire extinguisher valve durability test device according to claim 1, characterized in that: The No. 1 tooling is a disc structure with a plum blossom-shaped groove inside. A guide column that cooperates with the torque transmission mechanism is provided on the side close to the torque transmission mechanism; the groove of the No. 1 tooling is used to embed the handwheel.

4. The multifunctional integrated fire extinguisher valve durability test device according to claim 1, characterized in that: The support column is an inverted L-shaped structure, with the bottom installed on the machine table and a positioning plate with a slide groove installed on the top. The pneumatic telescopic mechanism is provided with a slider that is slidably connected to the slide groove, and the slider and the slide groove are fixed by a rotary locking mechanism.

5. The multifunctional integrated fire extinguisher valve durability test device according to claim 1, characterized in that: The pneumatic telescopic mechanism includes a main body, which is provided with a screw hole for passing through the rotary retraction mechanism; the outer side of the main body is connected to the positioning plate through a rotary locking mechanism, and a pneumatic push rod is installed inside the main body. An air supply port is provided on one side, and a push block is fixedly installed under the pneumatic push rod. Under the action of the air source, the pneumatic push rod can push the push block to reciprocate in the vertical direction.

6. The multifunctional integrated fire extinguisher valve durability test device according to claim 1, characterized in that: A No. 2 positioning plate is installed above the support frame, and a slide is fixedly installed on the No. 2 positioning plate. The slide is connected to the fixed end of the No. 2 pneumatic telescopic mechanism through a No. 2 rotary locking mechanism, which is used to adjust the distance between the No. 2 pneumatic telescopic mechanism and the support frame; the movable end of the No. 2 pneumatic telescopic mechanism is connected to the No. 3 tooling through a No. 2 connecting piece, and the fixed end of the No. 2 pneumatic telescopic mechanism can rotate relative to the support frame, and the movable end of the No. 2 pneumatic telescopic mechanism can rotate relative to the No. 3 tooling; the No. 3 tooling is hinged to the operating rod of the No. 3 tested valve below.

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