Central air conditioning refrigeration system safety valve detection device and method

Abstract

The invention discloses a central air-conditioning refrigeration system safety valve detection device and a method thereof, which relate to the technical field of safety valve detection and solve the problem of insufficient nut detection in safety valve detection. The invention comprises a detection plate, a docking tube for docking the safety valve is installed on the detection plate, two sliding rods are rotatably installed on the detection plate through the mounting plate, and the outer sides of the two sliding rods are slidably sleeved with a docking plate, and a clamping assembly for clamping the nuts at the outer ends of the safety valve is installed in the docking plate; a detection mechanism is installed on the outer sides of the two sliding rods, and the detection mechanism is used for detecting the tightness of the nuts; a driving mechanism is installed on the detection plate, and the outer end of the driving mechanism is connected to the clamping assembly. The invention realizes installation limit of the safety valve through the designed clamping assembly, and realizes positive and negative rotation of the nut on the safety valve through mutual cooperation with the driving mechanism, simulating human twisting, and then cooperates with the detection mechanism to realize the detection of the tightness of the nut after multiple rotations.

Description

Technical Field

[0001] The present invention relates to the technical field of safety valve detection, in particular to a safety valve detection device and a method for a central air-conditioning refrigeration system. Background Art

[0002] At present, the safety valves used in central air-conditioning refrigeration systems are basically OR safety valves, which are composed of a valve body, an internal blocking plate, a valve stem, a spring and other components. After docking on the pipeline, when the pressure in the pipeline is too high, the blocking plate will be pushed outward to release the pressure in the pipeline.

[0003] At present, the outer end of the OR safety valve on the market is generally designed with a nut. By turning the nut, the staff can drive the valve stem to move outward, so that the gas or liquid in the pipeline can be discharged outward, so that the safety valve body can be judged whether it is damaged during maintenance. The existing safety valves need to be tested after processing. Various tests are performed on the pressure resistance and other ranges of the safety valve through equipment. However, there is no equipment to detect the number of times the nut is turned and the degree of looseness. As a result, the nut may become loose after being frequently turned by personnel, which makes it easy to cause damage and leakage. For this reason, we propose a central air-conditioning refrigeration system safety valve detection device and method. Summary of the invention

[0004] The object of the present invention is to provide a central air conditioning refrigeration system safety valve detection device and method for detecting the problem of loose rotation of the safety valve nut, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a central air-conditioning refrigeration system safety valve detection device, comprising a detection plate, on which a docking tube for docking the safety valve is installed, two sliding rods are rotatably installed on the detection plate through the mounting plate, and the two sliding rods are slidably sleeved with a docking plate on the outer sides, and a clamping assembly for clamping the nut at the outer end of the safety valve is installed in the docking plate; a detection mechanism is installed on the outer sides of the two sliding rods, and the detection mechanism is used for detecting the tightness of the nut; a driving mechanism is installed on the detection plate, and the outer end of the driving mechanism is connected to the clamping assembly.

[0006] Preferably, the clamping assembly comprises a round tube, and an anti-slip opening for rotation is provided on the outer side of the nut at the outer end of the safety valve, a plurality of clamping openings are provided at equal angles on the round tube, and a clamping member engaged with the anti-slip opening is installed in each of the plurality of clamping openings, the outer side of one end of the round tube is rotatably plugged into the docking plate, and an adjusting ring is threadedly sleeved on the other end, a driving gear is fixed to the outer end of the round tube, a connecting rod is fixed on the docking plate, and a transmission gear meshing with the driving gear is rotatably sleeved on the outer end of the connecting rod, and the clamping of the nut is achieved by the clamping assembly.

[0007] Preferably, the clamping member includes a clamping plate which is slidably inserted in the clamping mouth and adapted to the anti-slip mouth, a moving mouth is opened in the clamping plate, and a connecting plate fixed to the inner wall of the clamping mouth is installed in the moving mouth, a connecting rod which slides through the connecting plate is fixed in the moving mouth, a pushing spring for pushing the clamping plate outward is sleeved on the outer side of the connecting rod, and a chamfer is opened on the outer end of the clamping plate which fits with the inner wall of the adjusting ring, and the clamping member is clamped with the outer side of the nut so that the nut can be screwed subsequently.

[0008] Preferably, the driving mechanism includes a driving motor fixed to the detection plate via a motor frame, the output end of the driving motor is fixed to the outer end of one of the sliding rods via a coupling, and the outer side of the sliding rod is swivel-connected with a connecting sleeve, a circular shell is fixed to the outer side of the connecting sleeve, and a circular ring is fixed inside the circular shell, a gear ring 1 and a gear ring 2 are fixed on the inner side of the circular shell and the outer side of the circular ring respectively, and the number of teeth of the gear ring 1 and the gear ring 2 are the same, a linkage gear column meshing with the gear ring 1 is installed on the inner side of the circular shell and the outer side of the circular ring, and a driving shaft is fixed to the outer end of the linkage gear column, the driving shaft is rotatably mounted on the detection plate via a mounting plate, and a driving gear column meshing with the transmission gear is fixed to the outer end of the driving shaft, an adjusting component is installed on the outer side of the sliding rod located at the outer end of the connecting sleeve, and power is provided by the driving mechanism.

[0009] Preferably, the adjusting component includes an electric push rod fixed on the mounting plate, an adjusting sleeve is fixed on the output end of the electric push rod, a docking column is rotatably plugged in the adjusting sleeve, a limit strip is fixed on the outside of the sliding rod located at the outer end of the connecting sleeve, the docking column is slidably sleeved on the outside of the sliding rod and slidably plugged with the limit strip, a mounting sleeve is slidably sleeved at the position of the two sliding rods corresponding to the detection mechanism, and a linkage fan plate is fixed on the outer end of one of the mounting sleeves and the connecting sleeve, a linkage plug-in plate plugged with the linkage fan plate is fixed on both ends of the docking column, and the linkage fan plate and the linkage plug-in plate docking end are chamfered, and the docking column is driven by the electric push rod to move back and forth on the sliding rod, thereby realizing the card connection with the mounting sleeve and the linkage fan plate at the outer end of the connecting sleeve.

[0010] Preferably, the detection mechanism includes two movable sleeves threadedly connected to the outside of the two mounting sleeves, a movable groove is opened at the outer end of the movable sleeve, and a contact ring is sleeved on the outside of the movable groove, an extrusion spring for pushing the contact ring is sleeved on the outside of the movable groove, and a pressure sensor is installed on the outside of the contact ring, a linkage rod is fixed between the two movable sleeves, and linkage parts are installed on the two mounting sleeves, so that the tightness of the nut can be adjusted through the detection mechanism.

[0011] Preferably, the linkage member comprises two linkage gears fixed on the two mounting sleeves, and the outer meshing sleeves of the two linkage gears are provided with toothed belts, and the mounting sleeves on the two slide rods are driven to rotate synchronously through the linkage member.

[0012] Preferably, the detection method of the safety valve of the central air-conditioning refrigeration system comprises the following steps:

[0013] S1. Butt the bottom thread of the safety valve assembled on the production line onto the butt pipe, then insert the nut into the round pipe and limit it by the clamping assembly;

[0014] S2. The driving mechanism provides power to drive the clamping assembly to drive the nut to perform forward and reverse operations, simulating the action of a person twisting the nut;

[0015] S3. Adjust the adjustment component so that the driving mechanism provides power to drive the detection mechanism to move outward, thereby realizing the detection of the tightness of the nut.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention realizes installation limit of the safety valve through the designed clamping component, realizes positive and negative rotation of the nut on the safety valve through mutual cooperation with the driving mechanism, simulates the twisting of a person, and then cooperates with the detection mechanism to realize the detection of the tightness of the nut after multiple rotations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the docking structure of the present invention and the safety valve;

[0019] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 3 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0021] Figure 4 It is a partial cross-sectional structural schematic diagram of the clamping assembly of the present invention;

[0022] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0023] Figure 6 It is a schematic diagram of the structure of the clamping member of the present invention;

[0024] Figure 7 It is a schematic diagram of the docking structure of the driving mechanism and the detection mechanism of the present invention;

[0025] Figure 8 It is a partial cross-sectional structural schematic diagram of the detection mechanism of the present invention;

[0026] Fig. 9It is a partial cross-sectional structural schematic diagram of the driving mechanism of the present invention;

[0027] Fig.10 This is a schematic diagram of the positional relationship between the circular shell and the circular ring of the present invention;

[0028] Fig.11 It is a schematic diagram of the structure of the regulating component of the present invention.

[0029] In the figure: 1-detection plate; 2-butt tube; 3-slide rod; 4-butt plate; 5-clamping assembly; 6-detection mechanism; 7-driving mechanism; 8-round tube; 9-clamping opening; 10-clamping member; 11-adjusting ring; 12-driving gear; 13-connecting rod; 14-transmission gear; 15-clamping plate; 16-moving opening; 17-connecting plate; 18-connecting rod; 19-pushing spring; 20-driving motor; 21-connecting sleeve; 22-round shell; 23-round ring ; 24-tooth ring one; 25-tooth ring two; 26-linked tooth column; 27-driving shaft; 28-driving tooth column; 29-adjusting assembly; 30-electric push rod; 31-adjusting sleeve; 32-docking column; 33-limiting strip; 34-installing sleeve; 35-linked fan plate; 36-linked plug plate; 37-moving sleeve; 38-moving groove; 39-contact ring; 40-extrusion spring; 41-linked rod; 42-linked member; 43-linked gear; 44-toothed belt. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] See also Figure 1-Figure 3 The central air-conditioning refrigeration system safety valve detection device shown in the figure includes a detection plate 1, on which a docking pipe 2 for docking the safety valve is installed, two sliding rods 3 are rotatably installed on the detection plate 1 through the mounting plate, and a docking plate 4 is slidably sleeved on the outer sides of the two sliding rods 3, and a clamping assembly 5 for clamping the nut at the outer end of the safety valve is installed in the docking plate 4; a detection mechanism 6 is installed on the outer sides of the two sliding rods 3, and the detection mechanism 6 is used for detecting the tightness of the nut; a driving mechanism 7 is installed on the detection plate 1, and the outer end of the driving mechanism 7 is connected to the clamping assembly 5.

[0033] It should be noted that: in this solution, the stable installation of the safety valve is achieved through the mutual cooperation of the clamping assembly 5 and the butt pipe 2, and the nut can be rotated forward and backward in coordination with the driving mechanism 7.

[0034] In this example, see Figure 4-Figure 6 The clamping assembly 5 shown in the figure includes a round tube 8, a nut at the outer end of the safety valve is provided with an anti-slip opening for rotation on the outer side, a plurality of clamping openings 9 are provided at equal angles on the round tube 8, and a clamping member 10 which is clamped with the anti-slip opening is installed in each of the plurality of clamping openings 9, the outer side of one end of the round tube 8 is rotatably plugged with the docking plate 4, and an adjusting ring 11 is threadedly sleeved on the other end, a driving gear 12 is fixed on the outer end of the round tube 8, a connecting rod 13 is fixed on the docking plate 4, and a transmission gear 14 which is meshed with the driving gear 12 is rotatably sleeved on the outer end of the connecting rod 13;

[0035] It should be noted that, by inserting the nut into the round tube 8 and docking the multiple clamping members 10 with the anti-slip opening, and by screwing the adjusting ring 11, the multiple clamping members 10 are clamped and limited with the anti-slip opening.

[0036] Among them, see Figure 6 The clamping member 10 shown in the figure includes a clamping plate 15 which is slidably inserted in the clamping opening 9 and adapted to the anti-slip opening. A moving opening 16 is opened in the clamping plate 15, and a connecting plate 17 fixed to the inner wall of the clamping opening 9 is installed in the moving opening 16. A connecting rod 18 which slides through the connecting plate 17 is fixed in the moving opening 16, and a push spring 19 is sleeved on the outer side of the connecting rod 18 for pushing the clamping plate 15 outward.

[0037] It should be noted that when the adjusting ring 11 does not squeeze the outer end of the clamping plate 15, the clamping plate 15 is driven to move outward by pushing the spring 19, so that the clamping plate 15 is separated from the anti-slip opening, which is convenient for disassembly.

[0038] It is worth noting that: the outer end of the clamping plate 15 is provided with a chamfer that fits with the inner wall of the adjusting ring 11 , so that when a person pushes the adjusting ring 11 , the clamping plate 15 can be pushed down smoothly.

[0039] Also, see Figure 7 , Fig. 9 and Fig.10 The driving mechanism 7 shown in the figure includes a driving motor 20 fixed to the detection plate 1 through a motor frame, the output end of the driving motor 20 is fixed to the outer end of one of the sliding rods 3 through a coupling, and the outer side of the sliding rod 3 is rotatably connected with a connecting sleeve 21, a circular shell 22 is fixed to the outer side of the connecting sleeve 21, and a circular ring 23 is fixed inside the circular shell 22, a gear ring 1 24 and a gear ring 25 are fixed to the inner side of the circular shell 22 and the outer side of the circular ring 23, respectively, and the number of teeth of the gear ring 1 24 and the gear ring 25 are the same, a linkage gear column 26 meshing with the gear ring 1 24 is installed on the inner side of the circular shell 22 and the outer side of the circular ring 23, and a driving shaft 27 is fixed to the outer end of the linkage gear column 26, the driving shaft 27 is rotatably installed on the detection plate 1 through a mounting plate, and a driving gear column 28 meshing with the transmission gear 14 is fixed to the outer end of the driving shaft 27, and an adjusting component 29 is installed on the outer side of the sliding rod 3 located at the outer end of the connecting sleeve 21.

[0040] It is worth noting that: through the rotation of the circular shell 22 and the circular ring 23, in conjunction with the alternating rotation of the gear ring 1 24 and the gear ring 2 25, the linkage gear column 26 is contacted alternately, so that the linkage gear column 26 continues to rotate forward and reverse, thereby controlling the rotation of the drive shaft 27, so that the drive gear column 28 drives the transmission gear 14 to rotate, and then drives the gear 12 to rotate, drives the circular tube 8 to rotate, and makes the multiple clamps 10 drive the nut to rotate forward and reverse, simulating a person twisting the nut.

[0041] In addition, in this solution, the detection method of the safety valve of the central air-conditioning refrigeration system includes the following steps:

[0042] S1. The bottom thread of the safety valve assembled on the production line is butted against the butt pipe 2, and then the nut is inserted into the round pipe 8, and the clamping assembly 5 is used to limit the position;

[0043] S2. The driving mechanism 7 provides power to drive the clamping assembly 5 to drive the nut to rotate forward and reverse, simulating the action of a person twisting the nut;

[0044] S3. Adjust the adjusting assembly 29 so that the driving mechanism 7 provides power to drive the detecting mechanism 6 to move outward, thereby detecting the tightness of the nut.

[0045] The principle of detecting the nut on the safety valve: first, the personnel accurately installs the safety valve on the detection plate 1, and then inserts the nut into the round tube 8, and by rotating the adjusting ring 11, the clamping plate 15 moves down and is clamped into the anti-slip mouth on the nut to achieve docking of the nut, and then the driving motor 20 is rotated to drive the slide rod 3 to rotate the connecting sleeve 21, thereby driving the round shell 22 to rotate continuously, so that the gear ring 1 24 and the gear ring 2 25 can cyclically reverse the linkage gear column 26, control the driving gear column 28 to rotate forward and reverse, so that the gear 12 is driven to rotate forward and reverse continuously, and simulate the personnel manually rotating the nut, and then the driving motor 20 is adjusted through the component 29 so that the round shell 22 is not driven to rotate, and the tightness of the rotated nut is detected through the detection mechanism 6, thereby realizing the detection of the nut on the safety valve.

[0046] In this solution, the driving motor 20 is preferably of model Y80M1-2. The power supply interface of the motor is connected to the power supply system through a switch. The motor operation circuit is a conventional motor forward and reverse control program. The circuit operation is an existing conventional circuit. The circuits and controls involved in this solution are all existing technologies and will not be elaborated on here.

[0047] Example 2

[0048] See also Figure 9-11The present embodiment further explains Example 1. The adjustment component 29 shown in the figure includes an electric push rod 30 fixed on the mounting plate, an adjustment sleeve 31 is fixed on the output end of the electric push rod 30, a docking column 32 is rotatably plugged in the adjustment sleeve 31, a limit strip 33 is fixed on the outer side of the sliding rod 3 located at the outer end of the connecting sleeve 21, the docking column 32 is slidably sleeved on the outer side of the sliding rod 3 and slidably plugged with the limit strip 33, a mounting sleeve 34 is slidably sleeved at the position of the two sliding rods 3 corresponding to the detection mechanism 6, and a linkage fan plate 35 is fixed on the outer end of one of the mounting sleeves 34 and the connecting sleeve 21, a linkage plug-in plate 36 plugged with the linkage fan plate 35 is fixed at both ends of the docking column 32, and the linkage fan plate 35 and the linkage plug-in plate 36 are chamfered at the docking ends.

[0049] It is worth noting that: the movement of the adjustment sleeve 31 and the docking column 32 is achieved by extending and retracting the electric push rod 30, and the linkage plug plate 36 on the docking column 32 is controlled to be plugged with the installation sleeve 34 and the linkage fan plate 35 at the outer end of the connecting sleeve 21, so that the rotation of the connecting sleeve 21 and the installation sleeve 34 can be controlled.

[0050] Example 3

[0051] See also Figure 7 and Figure 8 , this embodiment further explains other embodiments, the detection mechanism 6 shown in the figure includes two moving sleeves 37 threadedly sleeved on the outside of two mounting sleeves 34, the outer end of the moving sleeve 37 is provided with a moving groove 38, and the outer side of the moving groove 38 is sleeved with a contact ring 39, the outer side of the moving groove 38 is sleeved with an extrusion spring 40 for pushing the contact ring 39, and the outer side of the contact ring 39 is installed with a pressure sensor, a linkage rod 41 is fixed between the two moving sleeves 37, and a linkage member 42 is installed on the two mounting sleeves 34;

[0052] The linkage member 42 includes two linkage gears 43 fixed on the two mounting sleeves 34, and the outer meshing sleeves of the two linkage gears 43 are provided with toothed belts 44. The designed linkage member 42 can realize the synchronous rotation of the two mounting sleeves 34, so that the two moving sleeves 37 can move synchronously.

[0053] It should be noted that: when the electric push rod 30 is extended and retracted, the linkage plug plate 36 is docked with the linkage fan plate 35 at the outer end of the mounting sleeve 34, thereby controlling the rotation of the mounting sleeve 34, which can make the movable sleeve 37 move outward, and make the contact ring 39 and the docking plate 4 squeeze each other, so as to squeeze the nut, and with the continuous movement of the movable sleeve 37, the squeezing force is gradually increased. If the nut is loose, it will move outward under the specified squeezing force. At this time, the value provided by the pressure sensor can be used to determine whether it is loose.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A central air conditioning refrigeration system safety valve detection device, characterized in that: include: A detection plate (1), wherein a butt joint pipe (2) for butt jointing with a safety valve is mounted on the detection plate (1), two slide bars (3) are rotatably mounted on the detection plate (1) via a mounting plate, and a butt joint plate (4) is slidably sleeved on the outer sides of the two slide bars (3), and a clamping assembly (5) for clamping a nut at the outer end of the safety valve is mounted inside the butt joint plate (4); A detection mechanism (6) installed outside the two sliding rods (3), the detection mechanism (6) being used for detecting the tightness of the nut; A driving mechanism (7) mounted on the detection plate (1), wherein an outer end of the driving mechanism (7) is connected to the clamping assembly (5); The clamping assembly (5) comprises a round tube (8), the outer side of the nut at the outer end of the safety valve is provided with an anti-slip opening for rotation, a plurality of clamping openings (9) are provided at equal angles on the round tube (8), and a clamping member (10) which is clamped with the anti-slip opening is installed in each of the plurality of clamping openings (9), the outer side of one end of the round tube (8) is rotatably plugged into the docking plate (4), and the other end is threadedly sleeved with an adjusting ring (11), a driving gear (12) is fixed to the outer end of the round tube (8), a connecting rod (13) is fixed to the docking plate (4), and a transmission gear (14) which meshes with the driving gear (12) is rotatably sleeved on the outer end of the connecting rod (13); The clamping member (10) comprises a clamping plate (15) which is slidably inserted in the clamping opening (9) and adapted to the anti-slip opening, a moving opening (16) is opened in the clamping plate (15), and a connecting plate (17) fixed to the inner wall of the clamping opening (9) is installed in the moving opening (16), a connecting rod (18) which slides through the connecting plate (17) is fixed in the moving opening (16), a push spring (19) for pushing the clamping plate (15) outward is sleeved on the outer side of the connecting rod (18), and the outer end of the clamping plate (15) is opened with a chamfer which fits with the inner wall of the adjusting ring (11); The driving mechanism (7) comprises a driving motor (20) fixed to the detection plate (1) via a motor frame, the output end of the driving motor (20) being fixed to the outer end of one of the sliding rods (3) via a coupling, and the outer side of the sliding rod (3) being rotatably connected to a connecting sleeve (21), a circular shell (22) being fixed to the outer side of the connecting sleeve (21), and a circular ring (23) being fixed inside the circular shell (22), a toothed ring 1 (24) and a toothed ring 2 (25) being fixed to the inner side of the circular shell (22) and the outer side of the circular ring (23), respectively, and the toothed ring 1 (2 4) has the same number of teeth as the gear ring 2 (25), a linkage tooth column (26) meshing with the gear ring 1 (24) is installed on the inner side of the circular shell (22) and the outer side of the circular ring (23), and a driving shaft (27) is fixed to the outer end of the linkage tooth column (26), the driving shaft (27) is rotatably mounted on the detection plate (1) through a mounting plate, and a driving tooth column (28) meshing with the transmission gear (14) is fixed to the outer end of the driving shaft (27), and an adjustment component (29) is installed on the outer side of the sliding rod (3) located at the outer end of the connecting sleeve (21); The adjustment component (29) comprises an electric push rod (30) fixed on a mounting plate, an adjustment sleeve (31) fixed to an output end of the electric push rod (30), a docking column (32) rotatably plugged in the adjustment sleeve (31), a limit strip (33) fixed to the outer side of the outer end of the connecting sleeve (21) of the slide rod (3), the docking column (32) slidably sleeved on the outer side of the slide rod (3) and slidably plugged with the limit strip (33), a mounting sleeve (34) slidably sleeved at the positions of the two slide rods (3) corresponding to the detection mechanism (6), and a linkage fan plate (35) fixed to the outer ends of one of the mounting sleeves (34) and the connecting sleeve (21), a linkage plugging plate (36) plugged with the linkage fan plate (35) fixed to both ends of the docking column (32), and the docking ends of the linkage fan plate (35) and the linkage plugging plate (36) are both chamfered.

2. According to claim 1, the central air conditioning refrigeration system safety valve detection device is characterized in that: The detection mechanism (6) comprises two movable sleeves (37) threadedly sleeved on the outside of the two mounting sleeves (34); a movable groove (38) is formed at the outer end of the movable sleeve (37); a contact ring (39) is sleeved on the outside of the movable groove (38); a compression spring (40) for pushing the contact ring (39) is sleeved on the outside of the movable groove (38); a pressure sensor is installed on the outside of the contact ring (39); a linkage rod (41) is fixed between the two movable sleeves (37); and linkage parts (42) are installed on the two mounting sleeves (34).

3. According to claim 2, the central air conditioning refrigeration system safety valve detection device is characterized in that: The linkage member (42) comprises two linkage gears (43) fixed on the two mounting sleeves (34), and the outer meshing sleeves of the two linkage gears (43) are provided with toothed belts (44).

4. A method for detecting a safety valve of a central air-conditioning refrigeration system, applied to a device for detecting a safety valve of a central air-conditioning refrigeration system as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: S1. The bottom thread of the safety valve assembled on the production line is butted against the butt pipe (2), and then the nut is inserted into the round pipe (8), and the clamping assembly (5) is used to limit the position; S2. The driving mechanism (7) provides power to drive the clamping assembly (5) to drive the nut to perform forward and reverse operations, simulating the action of a person twisting the nut; S3. The adjusting assembly (29) is adjusted so that the driving mechanism (7) provides power to drive the detection mechanism (6) to move outward, thereby detecting the tightness of the nut.

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