Multifunctional integrated fire extinguisher valve durability test device

Abstract

The invention provides a multifunctional integrated fire extinguisher valve durability test device, which comprises a control unit, 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 and an air tightness test unit which are in signal connection with the control unit, the cart type carbon dioxide fire extinguisher valve test unit is used for detecting the durability of a cart type carbon dioxide fire extinguisher valve, the portable fire extinguisher valve test unit is used for detecting the durability of a portable fire extinguisher valve, and the cart type fire extinguisher low-pressure valve test unit is used for detecting the durability of a cart type fire extinguisher low-pressure valve. And the air tightness test unit is used for detecting the air tightness of the low-pressure valve of the cart type fire extinguisher and the valve of the portable fire extinguisher after the durability test is completed. According to the multifunctional integrated fire extinguisher valve durability test device, multiple functions are integrated on one set of equipment, the automation degree is high, and the durability detection efficiency of the valve can be greatly improved.

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] The valve is a key component of the fire extinguisher, a product of mandatory certification. It controls the release of fire extinguishing agents, and the durability of the valve is an important indicator to measure whether the valve can work reliably. According to the latest published mandatory national standard for fire extinguishers GB 4351-2023 "Portable Fire Extinguishers", Clause C.2.10, Clause A.2.8 of GB 8109-2023 "Trolley Fire Extinguishers", and Clause 6.2.5 of GB8109-2023 "Trolley Fire Extinguishers", Clause 5.3.6 of GB / T 15382-2021 "General Technical Requirements for Cylinder Valves", performance requirements are made for the durability of fire extinguisher valves. According to national standards, portable fire extinguisher valves and trolley fire extinguisher valves with a maximum working pressure of no more than 2.5MPa are required to undergo an air tightness test after opening and closing the valve 500 times in the full stroke under the maximum working pressure, and there should be no leakage, rupture, etc. However, due to the high maximum working pressure of the trolley-type carbon dioxide fire extinguisher valve, the national standard has made other provisions: according to the test method of clause 6.11 in GB / T 15382-2021 "General Technical Requirements for Cylinder Valves", the valve should be able to work normally and meet the air tightness requirements after 2000 cycles of opening and closing according to the durability torque under the test pressure. In short, the national standard on the durability test requirements of fire extinguisher valves is mainly divided into three parts: the durability test of portable fire extinguisher valves, the low-pressure valve of trolley-type fire extinguishers with a maximum working pressure of no more than 2.5MPa, and the valve of trolley-type carbon dioxide fire extinguisher. The durability tests of the three have different requirements for testing equipment. Among them, although the standard provisions of portable fire extinguisher valves and trolley-type fire extinguisher valves with a maximum working pressure of no more than 2.5MPa are similar, that is, the valve opening and closing cycle is completed 500 times, but the valve structure is different, and two sets of workstations are also required to achieve it. Each opening and closing cycle of the cart-type carbon dioxide fire extinguisher valve requires a specific opening and closing torque and pressure determination, which places high demands on the equipment's station structure and automation level. According to the current technical level, the durability test of these three types of fire extinguisher valves often requires three devices to be implemented, and the valve to be tested needs to be installed on another special device, and then the valve opening and closing cycle is carried out. After the cycle is completed, the air tightness test is carried out on another device to complete the entire durability test. Therefore, the existing fire extinguisher valve durability testing equipment has a low degree of automation and a low level of integration, which affects the valve detection 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 detection 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 installed above it, 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.

[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, the portable fire extinguisher valve test unit, the trolley-type fire extinguisher low-pressure valve test unit, and the air tightness test unit.

[0011] Furthermore, the trolley-type carbon dioxide fire extinguisher valve test unit includes a torque transmission mechanism, and the torque transmission mechanism is connected to the handwheel of the No. 1 valve under test through a No. 1 tooling at the bottom, so that the torque transmission mechanism has centrality when applying torque to the No. 1 valve under test; the No. 1 valve under test is also provided with an air inlet for pressurization, and the air outlet of the No. 1 valve under test 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 by signals.

[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 reciprocate 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 hand wheel.

[0014] Furthermore, the portable fire extinguisher valve test unit includes a support column and a pneumatic telescopic mechanism installed above the support column, 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 lower part installed on the machine table and a positioning plate with a slide groove installed on the upper part. The pneumatic telescopic mechanism is provided with a slider 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 the rotating retraction mechanism; the outer side of the main body is connected to the positioning plate through a rotating locking mechanism, 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.

[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 plate is fixedly installed on the No. 2 positioning plate. The slide plate is connected to the fixed end of the No. 2 pneumatic telescopic mechanism through a No. 2 rotating 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, 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 groove, an observation cover, and a tooling arranged above the upper cover. 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 upper part is used to pour liquid into the test groove. The lower part of the upper cover is sealed and connected to 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, with a high degree of automation and integration, which greatly improves the durability detection efficiency of the valve.

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

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

[0024] Figure 1 A 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 A schematic diagram of a portable fire extinguisher valve test unit according to an embodiment of the present invention;

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

[0028] Figure 5 It is a schematic diagram of the airtightness test unit described in an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1- torque transmission mechanism; 2- tooling No. 1; 3- hand wheel; 4- valve No. 1 to be tested; 5- outlet; 6- air inlet; 7- pressure charging port No. 1; 8- high pressure pipe; 9- pressure determination mechanism; 10- electromagnetic 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- pressure handle; 19- valve No. 2 to be tested; 20- tooling No. 2; 21- base No. 2; 22- pressure 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- No. 1 connecting piece; 29- No. 2 pneumatic telescopic mechanism; 30- No. 2 air inlet; 31- push rod; 32- No. 2 connecting piece; 33- No. 3 tooling; 34- operating lever; 35- No. 3 valve to be tested; 36- No. 3 base; 37- No. 3 charging port; 38- observation cover; 39- upper cover; 40- lower cover; 41- No. 4 base; 42- No. 4 charging port; 43- tooling; 44- valve to be tested; 45- trolley-type carbon dioxide 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 positions or positional relationships based on the positions 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", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like 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 clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by 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, it includes a machine and a cart-type carbon dioxide 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 the machine. The cart-type carbon dioxide fire extinguisher valve test unit 45 is used to detect the durability of the cart-type carbon dioxide fire extinguisher valve, the portable fire extinguisher valve test unit 46 is used to detect the durability of the portable fire extinguisher valve, the cart-type fire extinguisher low-pressure valve test unit 47 is used to detect the durability of the cart-type fire extinguisher low-pressure valve, and the air tightness test unit 48 is used to detect the air tightness of the cart-type fire extinguisher low-pressure valve and the portable fire extinguisher valve 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, 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 PLC.

[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, and the No. 1 charging port 7 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 through the No. 1 tooling 2, so that the torque transmission mechanism 1 has a centering property 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 by signals.

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

[0038] In one or more embodiments, the torque transmission mechanism 1 includes a housing adapted to the No. 1 tool 2, a torque sensor and a rotary motor are installed on the housing, the rotary motor can drive the housing to rotate, one side of the rotary motor is connected to a transmission mechanism, the transmission mechanism can drive the rotary motor to reciprocate up and down, and the torque sensor, the rotary motor and the transmission mechanism are all connected to the control unit. The transmission mechanism can be a combination of a conveyor belt and a motor or a sprocket and a motor that can achieve the above functions.

[0039] The handwheel 3 is a plum blossom-shaped handwheel, and the No. 1 tooling 2 is a disc structure with a plum blossom-shaped groove inside. A guide column matching the same is provided on the side close to the torque transmission mechanism 1. The groove of the No. 1 tooling 2 can correctly fit the handwheel 3 of the No. 1 tested valve 4 to ensure that the handwheel 3 of the No. 1 tested valve 4 is centered when a torque is applied to the handwheel 3. The plum blossom-shaped groove tooling is rigidly connected to the torque transmission mechanism 1 to ensure the reliability of torque transmission, and it should also have 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 No. 1 tested valve 4 and the high-pressure pipe 8, the air inlet 6 and the No. 1 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 the durability test of the trolley-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 axially raised upward through the torque transmission mechanism 1, and the No. 1 tested valve 4 is installed on the No. 1 base 11. Then, by translating and rotating the No. 1 tooling 2 up and down, the No. 1 tooling 2 is embedded in the plum blossom-shaped handwheel 3 of the tested valve, and nitrogen or air is filled from the No. 1 charging port 7 to the test pressure P of the tested valve. VT (P VT The test preparation work can be completed according to the standard GB / T 15382-2021). The trolley-type carbon dioxide fire extinguisher valve test unit 1 of this equipment can automatically perform the opening and closing cycle test 2000 times according to the standard GB / T 15382-2021 cycle steps S1-S6):

[0044] S1. At the beginning of the durability test, the control unit controls the torque transmission mechanism 1 to pass the torque T e,start (T e,start Determined by standard GB / T 15382-2021) Close the No. 1 tested valve 4;

[0045] S2, keep for 6 seconds, the pressure determination mechanism 9 transmits the data information to the control unit. When the pressure drop recognized by the pressure determination mechanism 9 exceeds 1MPa, the first tested valve 4 is judged to be unqualified and the cycle is terminated; if the pressure drop does not exceed 1MPa, it is qualified 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 When the pressure rise is determined by the 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 first tested valve 4;

[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 upper part. 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, so as to conveniently place the second tested valve 19. Preferably, the bottom of the second tooling 20 is connected to the machine table through a second base 21, and a second pressure charging port 22 is provided on the second base 21.

[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 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 to connect 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 below 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] Since the No. 2 tested valve 19 has many imported thread specifications, it needs to be installed on the matching No. 2 tooling 20 first, and then installed on the base 21. The charging port 22 is located on the base 21, which can charge the No. 2 tested valve 19. When conducting the portable fire extinguisher valve durability test according to the standard GB 4351-2023 "Portable Fire Extinguisher", the rotating locking mechanism 14 locks the pneumatic telescopic mechanism 15 to a suitable test position. The pneumatic conditions of the pneumatic telescopic mechanism 15 need to be provided by an external air source, which can be supplied to the air supply port 23 of the pneumatic telescopic mechanism 15 by an air compressor (the air compressor signal is connected to the control unit), and then charged to the standard specified pressure of the No. 2 tested valve 19 through the No. 2 charging port 22, and the pre-test preparation work can be completed. The push block 17 presses the No. 2 tested valve 19 downward to open it. When the push block 17 is lifted above the pressure handle 18 of the No. 2 tested valve 19, the No. 2 tested valve 19 is closed. This station can automatically complete 500 opening and closing cycles of the No. 2 tested valve 19 at 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 rotating 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 support frame 24 is fixed to the machine table at the bottom, and the No. 2 pneumatic telescopic mechanism 29 is installed at the top, 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 plate 27 is fixedly installed on the No. 2 positioning plate 25. The slide plate 27 is connected to the fixed end of the No. 2 pneumatic telescopic mechanism 29 through a No. 2 rotating 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 a No. 2 connecting piece 32, and the No. 1 connecting piece 28 and the No. 2 connecting piece 32 are both U-shaped pieces, 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 at the bottom. When the No. 2 pneumatic telescopic mechanism 29 is active, the push rod 31 will rotate through the No. 2 connecting piece 32, thereby driving the No. 3 tooling 33 to rotate and press the operating rod 34, and then open and close the No. 3 tested valve 35. The third tool 33 is a rectangular block with connecting 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 durability test of low-pressure valves of trolley-type fire extinguishers with a maximum working pressure of no more than 2.5MPa according to the standard GB 8109-2023 "Trolley-type fire extinguishers", according to the opening and closing stroke of the operating rod 34 of the No. 3 tested valve 35, the No. 2 rotary locking mechanism 26 locks the slide plate 27 to a suitable test position, and the external air source can be supplied by the air compressor to the No. 2 air inlet 30 of the pneumatic telescopic mechanism 29, and then pressurized to the standard pressure of the No. 3 tested valve 35 through the No. 3 charging port 37, and the preparation work before the test can be completed. When the pneumatic push rod 31 is retracted, the No. 3 tested valve 35 is in a closed state, and when the pneumatic push rod 31 is extended, the No. 3 tested valve 35 is in an open state. This station can automatically complete 500 opening and closing cycles of the No. 3 tested valve 35, with a frequency of 20 times per minute.

[0064] The air tightness 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 upper cover 39 is sealed and connected to the lower cover 40 at the bottom.

[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, a waterproof sealing pad is provided between the lower cover 39 and the lower cover 40, and a notch is left for sealing and 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 Fire Extinguishers" and GB 4351-2023 "Portable Fire Extinguishers", for the durability test of the low-pressure valve of the trolley fire extinguisher and the valve of the portable fire extinguisher with a maximum working pressure not exceeding 2.5MPa, in addition to completing 500 cycles of opening and closing of the tested valve, an air tightness test is also required. After the durability test of the low-pressure valve of the trolley fire extinguisher and the valve of the portable fire extinguisher is completed, the tested valve can be directly installed on the air tightness test unit for air tightness test. During the test, clamp the notch between the lower cover 39 and the lower cover 40 with a vise to seal the lower cover 39 and the lower cover 40, and then fill water from the top of the transparent water tank observation cover 38. The water level should be added to a position where the highest point of the tested valve 44 is immersed by more than 50mm. By charging the pressure through the No. 4 charging port 42 to the pressure specified by the standard, the airtight 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 on 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional integrated fire extinguisher valve durability test device, characterized in that: It includes a control unit and its signal-connected trolley-type carbon dioxide fire extinguisher valve test unit, a portable fire extinguisher valve test unit, a trolley-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 portable fire extinguisher valves. 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 cart-type 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 trolley-type carbon dioxide fire extinguisher valve test unit, the portable fire extinguisher valve test unit, the trolley-type fire extinguisher low-pressure valve test unit, and the air tightness test unit.

2. The multifunctional integrated fire extinguisher valve durability test device according to claim 1, characterized in that: The trolley-type carbon dioxide fire extinguisher valve test unit includes a torque transmission mechanism, the lower part of the torque transmission mechanism is connected to the handwheel of the No. 1 valve under test through the No. 1 tooling, so that the torque transmission mechanism has centrality when applying torque to the No. 1 valve under test; the No. 1 valve under test is also provided with an air inlet for pressurization, and the air outlet of the No. 1 valve under test 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 by signals.

3. The multifunctional integrated fire extinguisher valve durability test device according to claim 2, 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 reciprocate up and down, and the torque sensor, rotating motor and transmission mechanism are all connected to the control unit.

4. The multifunctional integrated fire extinguisher valve durability test device according to claim 2, characterized in that: 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 hand wheel.

5. The multifunctional integrated fire extinguisher valve durability test device according to claim 1, characterized in that: The portable fire extinguisher valve test unit includes a support column and a pneumatic telescopic mechanism installed above the support column. The pneumatic telescopic mechanism is used to open and close the No. 2 tested valve. The No. 2 tooling is located below the pneumatic telescopic mechanism and is used to fix the No. 2 tested valve.

6. The multifunctional integrated fire extinguisher valve durability test device according to claim 5, characterized in that: The support column is an inverted L-shaped structure, with the lower part installed on the machine table and a positioning plate with a slide groove installed on the upper part. The pneumatic telescopic mechanism is provided with a slider slidably connected to the slide groove, and the slider and the slide groove are fixed by a rotating locking mechanism.

7. The multifunctional integrated fire extinguisher valve durability test device according to claim 5, characterized in that: The pneumatic telescopic mechanism includes a main body, which is provided with a screw hole for passing the rotating retracting mechanism; the outer side of the main body is connected to the positioning plate through a rotating locking mechanism, 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.

8. The multifunctional integrated fire extinguisher valve durability test device according to claim 1, characterized in that: 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.

9. The multifunctional integrated fire extinguisher valve durability test device according to claim 8, characterized in that: A No. 2 positioning plate is installed above the support frame, and a slide plate is fixedly installed on the No. 2 positioning plate. The slide plate is connected to the fixed end of the No. 2 pneumatic telescopic mechanism through a No. 2 rotating 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 at the bottom with the operating rod of the No. 3 valve to be tested.

10. The multifunctional integrated fire extinguisher valve durability test device according to claim 1, characterized in that: The air tightness test unit includes an upper cover and a test tank, an observation cover, and a tooling arranged above the upper cover. 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 upper part is used to pour liquid into the test tank. The lower part of the upper cover is sealed and connected to the lower cover.

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