Portable valve inspection and maintenance device

Abstract

The utility model relates to the technical field of natural gas valve inspection and maintenance equipment, and discloses a portable valve inspection and maintenance device which comprises a rectangular lower box body, an upper box body and a lower box body, the protection structure comprises a first protection part and a second protection part, the first protection part comprises a third limiting frame plate fixedly installed at the bottom of the inner side of the lower box body, the inner walls of the two sides of the third limiting frame plate are each fixedly provided with a set of second limiting plates, and the outer wall of one side of each second limiting plate is fixedly provided with a third limiting plate; anti-slip strips are mounted on the outer wall of one side of the third limiting plate in a sticking manner, and a handheld air pressure detector is mounted between the two anti-slip strips in a clamping manner. The second protection part comprises two groups of first sliding grooves formed in the handheld air pressure detector, so that the purpose of protecting the device is achieved, the placement effect of the device in a box is improved, the placement stability of the device is improved, the keys are shielded, the condition that the keys are mistakenly touched is reduced, and the protection effect of the device is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of natural gas valve inspection and maintenance equipment, specifically, it relates to a portable valve inspection and maintenance device. Background Technology

[0002] In natural gas transmission and storage systems, valves are critical equipment for controlling natural gas flow and pressure, as well as for controlling pipeline opening and closing. Due to the flammable and explosive nature of natural gas, and the fact that valves are exposed to harsh environments such as high pressure and low temperature during transmission, they are prone to malfunctions such as seal failure, valve stem jamming, and component corrosion. These malfunctions not only affect the normal transmission of natural gas but can also lead to serious safety accidents.

[0003] Utility model CN219574026U relates to the field of gas detector technology and discloses a handheld gas detector. It includes an alarm device fixedly mounted on the bottom of the main body, a detector fixedly mounted on the top of the main body, a battery compartment fixedly located on one side of the main body, a hanging bracket fixedly mounted on one side of the main body, and a carrying strap fixedly mounted on one side of the bracket. This handheld gas detector, through the coordinated arrangement of the main body, alarm device, and detector, constitutes the most basic functions of the device. The main body's buttons are relatively large, making it easier for workers wearing gloves to use. The alarm device provides timely alerts when an anomaly is detected. The detector ensures sufficient light for use in dimly lit environments. The battery compartment, bracket, and carrying strap enhance the device's practicality and convenience during use.

[0004] However, the aforementioned patents still have the following problems: During the maintenance of natural gas valves, maintenance personnel need to carry multiple maintenance tools, which may collide or be squeezed against each other. Handheld gas detectors are prone to accidental button presses during transport, which not only consumes battery power but may also affect the subsequent normal use of the instrument. Furthermore, the instrument lacks an effective external protective structure, making it susceptible to damage from impacts and scratches during transport. Once the instrument is subjected to external impact, the internal precision electronic components may be affected, leading to decreased instrument performance or even damage, resulting in inaccurate gas concentration detection. The device is also inconvenient to carry.

[0005] In view of this, this utility model is proposed. Utility Model Content

[0006] To solve the aforementioned technical problem of poor instrument protection, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A portable valve inspection and maintenance device, comprising:

[0008] The lower housing is rectangular.

[0009] The protective structure includes a first protective part and a second protective part. The first protective part includes a third limiting frame plate fixedly installed on the bottom side of the lower housing. A set of second limiting plates is fixedly installed on both inner walls of the third limiting frame plate. A third limiting plate is fixedly installed on one outer wall of the second limiting plate. An anti-slip strip is pasted on one outer wall of the third limiting plate. A handheld barometer is snapped between the two sets of anti-slip strips. The second protective part includes two sets of first sliding grooves opened inside the handheld barometer. A first slider is slidably installed inside the first sliding groove. A push plate is fixedly installed between the two sets of first sliders.

[0010] In a preferred embodiment of the present invention, the second protective part further includes two sets of second limiting frame plates fixedly installed on the bottom side of the lower box body. The second limiting frame plates have a first snap-fit ​​groove inside. An upper box body is provided on the top of the lower box body. Two sets of third snap-fit ​​plates are fixedly installed on the bottom of the upper box body. The third snap-fit ​​plates are snap-fitted into the inside of the first snap-fit ​​groove.

[0011] In a preferred embodiment of this utility model, a first fixing sleeve is fixedly installed on one side of the outer wall of the upper housing, a first snap-fit ​​plate is slidably installed inside the first fixing sleeve, a first limiting plate is fixedly installed on the top of the first snap-fit ​​plate, a second fixing sleeve is fixedly installed on one side of the outer wall of the lower housing, two sets of first snap-fit ​​holes are opened inside the second fixing sleeve, a second snap-fit ​​plate is fixedly installed at the bottom of the first snap-fit ​​plate, and two sets of spring clips are provided inside the second snap-fit ​​plate, the spring clips are snapped into the inside of the first snap-fit ​​holes.

[0012] In a preferred embodiment of the present invention, a set of first fixing plates is fixedly installed on one outer wall of both the lower box and the upper box. A first fixing rod is rotatably installed inside the first fixing plate. Two sets of first limiting frame plates are sleeved between the two sets of first fixing rods. An elastic plate is fixedly installed between the two sets of first fixing plates.

[0013] In a preferred embodiment of this utility model, two sets of fourth limiting frame plates are fixedly installed on the inner bottom of the lower box, and a connecting pipe is snapped into the inside of the fourth limiting frame plate. Two sets of first protective pads are fixedly installed on the bottom of the upper box, and the bottom of the first protective pads is in close contact with the outer wall of the connecting pipe. Four sets of universal wheels are fixedly installed on one side of the outer wall of the lower box.

[0014] In a preferred embodiment of this utility model, a set of anti-slip side plates are affixed to both outer walls of the handheld barometer, a wrist strap is provided on the outer wall of the handheld barometer, a display screen is fixedly installed inside the handheld barometer, and four sets of buttons are provided inside the handheld barometer, with the display screen and buttons electrically connected.

[0015] In a preferred embodiment of this utility model, a hole is provided on one outer wall of the handheld barometer, a first fixing ring plate is fixedly installed in the hole, a first magnetic suction plate is fixedly installed inside the first fixing ring plate, a telescopic tube is provided inside the handheld barometer, a first dust cover is fixedly installed at one end of the telescopic tube, a second magnetic suction plate is fixedly installed on one outer wall of the first dust cover, the second magnetic suction plate and the first magnetic suction plate are magnetically connected, a first air inlet pipe is fixedly installed on the other outer wall of the first dust cover, a second air inlet pipe is fixedly installed at one end of the first air inlet pipe, and a first threaded groove is provided inside the second air inlet pipe.

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

[0017] 1. To achieve the purpose of protecting the device, improve the placement effect of the device inside the box, enhance the stability of the device placement, cover the buttons to reduce accidental button presses, and improve the protective effect of the device.

[0018] 2. To achieve the purpose of opening and closing the device, improve the sealing effect of the device, reduce the impact of the external environment on the equipment, extend the service life of the device, and improve the durability of the device.

[0019] 3. To achieve the purpose of gas pressure testing of natural gas valves, to facilitate the retraction and extension of the testing pipeline, to improve the grip of the instrument, to enhance the ease of use of the device, and to optimize the user experience.

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0021] In the attached diagram:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram showing the disassembled second fixing sleeve and second snap-fit ​​plate of this utility model;

[0024] Figure 3 This is a schematic diagram of the first fixing plate structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the third snap-fit ​​plate structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the second limiting plate structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the handheld barometer of this utility model.

[0028] Figure 7 This is a schematic diagram of the first groove structure of this utility model;

[0029] Figure 8 This is a schematic diagram of the second air intake pipe structure of this utility model.

[0030] In the diagram: 10. Lower housing; 11. Upper housing; 12. First fixing sleeve; 13. Second fixing sleeve; 14. First snap-fit ​​hole; 15. First snap-fit ​​plate; 16. First limiting plate; 17. Second snap-fit ​​plate; 18. Spring buckle; 19. First fixing plate; 20. First fixing rod; 21. First limiting frame plate; 22. Elastic plate; 23. Third snap-fit ​​plate; 24. First protective pad; 25. Second limiting frame plate; 26. First snap-fit ​​groove; 27. Third limiting frame plate; 28. Second limiting plate 29. Third limiting plate; 30. Anti-slip strip; 31. Fourth limiting frame plate; 32. Connecting pipe; 33. Handheld air pressure detector; 34. Display screen; 35. Anti-slip side plate; 36. Wrist strap; 37. First slide groove; 38. Push plate; 39. First slider; 40. Button; 41. First fixing ring plate; 42. First magnetic suction plate; 43. Telescopic tube; 44. First dust cover; 45. Second magnetic suction plate; 46. First air inlet pipe; 47. Second air inlet pipe; 48. First threaded groove; 49. Universal wheel. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0032] Example 1: A portable valve inspection and maintenance device, specifically as follows Figure 1 , Figure 5 , Figure 6 and Figure 7As shown, the device includes a lower housing 10, which is rectangular in shape; a protective structure, comprising a first protective part and a second protective part. The first protective part includes a third limiting frame plate 27 fixedly installed on the bottom inner side of the lower housing 10. A set of second limiting plates 28 are fixedly installed on both inner walls of the third limiting frame plate 27. A third limiting plate 29 is fixedly installed on one outer wall of the second limiting plate 28. An anti-slip strip 30 is pasted on one outer wall of the third limiting plate 29. A handheld barometer 33 is snapped between the two sets of anti-slip strips 30. The second protective part includes two sets of first sliding grooves 37 opened inside the handheld barometer 33. A first slider 39 is slidably installed inside the first sliding groove 37. A push plate 38 is fixedly installed between the two sets of first sliders 39. The equipment is protected by a protective structure. The handheld barometer 33 is placed between two sets of third limiting plates 29, so that the outer walls of the two sets of anti-slip strips 30 are in close contact with the outer wall of the handheld barometer 33, limiting the handheld barometer 33 to the inside of the third limiting frame plate 27. The push plate 38 is pushed, causing the push plate 38 to move inside the handheld barometer 33, causing the first slider 39 to slide inside the first slide groove 37, thus blocking the first slider 39.

[0033] Specifically, such as Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, the second protective part also includes two sets of second limiting frame plates 25 fixedly installed on the bottom inner side of the lower housing 10. The interior of each second limiting frame plate 25 has a first snap-fit ​​groove 26. An upper housing 11 is located at the top of the lower housing 10. Two sets of third snap-fit ​​plates 23 are fixedly installed at the bottom of the upper housing 11, and the third snap-fit ​​plates 23 are snap-fitted into the interior of the first snap-fit ​​groove 26. Placing the upper housing 11 on top of the lower housing 10 and snap-fitting the third snap-fit ​​plates 23 into the interior of the first snap-fit ​​groove 26 seals the equipment.

[0034] Based on the above, the structure of the lower housing 10, the third retaining plate 23, the second limiting frame plate 25, the first retaining groove 26, the third limiting frame plate 27, the second limiting plate 28, the third limiting plate 29, the anti-slip strip 30, the fourth limiting frame plate 31, the connecting pipe 32, the handheld air pressure detector 33, the first sliding groove 37, the push plate 38, and the first slider 39 achieves the purpose of protecting the device, improving the placement effect of the equipment in the housing, improving the stability of the equipment placement, shielding the buttons, reducing the situation of accidental button touch, and improving the protective effect of the device.

[0035] Example 2: Based on Example 1, specifically as follows... Figure 1 , Figure 2 and Figure 4As shown, a first fixing sleeve 12 is fixedly installed on one outer wall of the upper housing 11. A first snap-fit ​​plate 15 is slidably installed inside the first fixing sleeve 12. A first limiting plate 16 is fixedly installed on the top of the first snap-fit ​​plate 15. A second fixing sleeve 13 is fixedly installed on one outer wall of the lower housing 10. Two sets of first snap-fit ​​holes 14 are opened inside the second fixing sleeve 13. A second snap-fit ​​plate 17 is fixedly installed on the bottom of the first snap-fit ​​plate 15. Two sets of spring-loaded fasteners 18 are provided inside the second snap-fit ​​plate 17. The spring-loaded fasteners 18 are snapped into the inside of the first snap-fit ​​holes 14. When the first snap-fit ​​plate 15 is placed inside the first fixing sleeve 12, so that the spring-loaded fasteners 18 are snapped into the inside of the first snap-fit ​​holes 14, pressing the spring-loaded fasteners 18 and pushing the first limiting plate 16 upward, the first snap-fit ​​plate 15 can be removed from the inside of the first fixing sleeve 12.

[0036] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, a set of first fixing plates 19 are fixedly installed on one outer wall of both the lower housing 10 and the upper housing 11. A first fixing rod 20 is rotatably installed inside the first fixing plate 19. Two sets of first limiting frame plates 21 are sleeved between the two sets of first fixing rods 20. An elastic plate 22 is fixedly installed between the two sets of first fixing plates 19. Pushing the upper housing 11 causes the elastic plate 22 to bend, connecting the lower housing 10 and the upper housing 11 through the two sets of first limiting frame plates 21, the first fixing rods 20, and the first fixing plates 19.

[0037] Specifically, such as Figure 1 and Figure 5 As shown, two sets of fourth limiting frame plates 31 are fixedly installed on the inner bottom of the lower housing 10. A connecting pipe 32 is snapped into the inside of the fourth limiting frame plate 31. Two sets of first protective pads 24 are fixedly installed on the bottom of the upper housing 11. The bottom of the first protective pads 24 is in close contact with the outer wall of the connecting pipe 32. Four sets of universal wheels 49 are fixedly installed on one outer wall of the lower housing 10. When the connecting pipe 32 is placed inside the fourth limiting frame plate 31, and the lower housing 10 and the upper housing 11 are tightly sealed, the first protective pads 24 limit the connecting pipe 32 to be located inside the fourth limiting frame plate 31, and the device is moved by the four sets of universal wheels 49.

[0038] Based on the above, the structure of the lower housing 10, upper housing 11, first fixing sleeve 12, second fixing sleeve 13, first snap-fit ​​hole 14, first snap-fit ​​plate 15, first limiting plate 16, second snap-fit ​​plate 17, spring buckle 18, first fixing plate 19, first fixing rod 20, first limiting frame plate 21, elastic plate 22, first protective pad plate 24, fourth limiting frame plate 31, connecting pipe 32 and universal wheel 49 achieves the purpose of opening and closing the device, improves the sealing effect of the device, reduces the impact of the external environment on the equipment, extends the service life of the device, and improves the durability of the device.

[0039] Example 3: Based on Examples 1 and 2, specifically as follows... Figure 6 and Figure 7 As shown, a set of anti-slip side plates 35 are affixed to both outer walls of the handheld barometer 33. A wrist strap 36 is provided on the outer wall of the handheld barometer 33. A display screen 34 is fixedly installed inside the handheld barometer 33, and four sets of buttons 40 are provided inside the handheld barometer 33. The display screen 34 and the buttons 40 are electrically connected. The anti-slip side plates 35 improve the grip of the handheld barometer 33, the wrist strap 36 assists in gripping the handheld barometer 33, and the display screen 34 allows for observation of test data.

[0040] Specifically, such as Figure 6 , Figure 7 and Figure 8 As shown, a hole is provided on one outer wall of the handheld barometer 33. A first fixing ring plate 41 is fixedly installed in the hole. A first magnetic suction plate 42 is fixedly installed inside the first fixing ring plate 41. A telescopic tube 43 is provided inside the handheld barometer 33. A first dust cover 44 is fixedly installed at one end of the telescopic tube 43. A second magnetic suction plate 45 is fixedly installed on one outer wall of the first dust cover 44. The second magnetic suction plate 45 and the first magnetic suction plate 42 are magnetically connected. A first air inlet pipe 46 is fixedly installed on the other outer wall of the first dust cover 44. A second air inlet pipe 47 is fixedly installed at one end of the first air inlet pipe 46. A first threaded groove 48 is provided inside the second air inlet pipe 47. Pulling the first dust cover 44 separates the second magnetic suction plate 45 and the first magnetic suction plate 42, causing the telescopic tube 43 to extend and retract, changing the measuring distance of the first air inlet pipe 46. The barometer is then spirally installed inside the first threaded groove 48 to measure the barometer pressure.

[0041] In summary, the handheld air pressure detector 33, display screen 34, anti-slip side plate 35, wrist strap 36, first fixing ring plate 41, first magnetic suction plate 42, telescopic tube 43, first dust cover 44, second magnetic suction plate 45, first air inlet pipe 46, second air inlet pipe 47, and first threaded groove 48 achieve the purpose of air pressure detection on natural gas valves, facilitate the retraction and extension of the detection pipeline, improve the grip of the instrument, enhance the convenience of use, and optimize the user experience.

[0042] Working Principle: The handheld barometer is placed inside the third limiting frame plate at the bottom inside the lower housing, specifically between two sets of third limiting plates. The third limiting plate is fixed to the inner walls of both sides of the third limiting frame plate via the second limiting plate, and an anti-slip strip is attached to the outer wall of one side of the third limiting plate. The outer walls of the two sets of anti-slip strips are in close contact with the outer wall of the handheld barometer, thus confining the handheld barometer within the third limiting frame plate and preventing it from swinging freely inside the housing, providing initial protection. Two sets of first sliding grooves are provided inside the handheld barometer, within which first sliders are slidably installed. A push plate is fixedly installed between the two sets of first sliders. When the push plate is pushed, it moves inside the handheld barometer, causing the first sliders to slide within the first sliding grooves, thus shielding the first sliding grooves and other parts to prevent dust and other contaminants from entering the detector, further protecting it. Two sets of second limiting frame plates are fixedly installed at the bottom inside the lower housing, and first locking grooves are provided inside the second limiting frame plates. Two sets of third snap-fit ​​plates are fixedly installed at the bottom of the upper housing. The upper housing is placed on top of the lower housing, and the third snap-fit ​​plates snap into the first snap-fit ​​grooves, sealing the equipment and preventing external dust and moisture from entering and damaging the equipment. A set of first fixing plates is fixedly installed on one outer wall of both the lower and upper housings. A first fixing rod is rotatably installed inside the first fixing plate. Two sets of first limiting frame plates are fitted between the two sets of first fixing rods, and a spring plate is fixedly installed between the two sets of first fixing plates. The lower and upper housings are connected through the two sets of first limiting frame plates, the first fixing rods, and the first fixing plates. The spring plate provides cushioning and connection assistance. A first fixing sleeve is fixedly installed on one outer wall of the upper housing. A first snap-fit ​​plate is slidably installed inside the first fixing sleeve, and a first limiting plate is fixedly installed on top of the first snap-fit ​​plate. A second fixing sleeve is fixedly installed on the outer wall of one side of the lower housing. Two sets of first snap-fit ​​holes are opened inside the second fixing sleeve. The second snap-fit ​​plate is fixedly installed at the bottom of the first snap-fit ​​plate. Two sets of spring snap fasteners are set inside the second snap-fit ​​plate. The spring snap fasteners are snapped into the first snap-fit ​​holes. When the housing needs to be opened, press the spring snap fasteners and push the first limiting plate upward. The first snap-fit ​​plate can be taken out from the first fixing sleeve. At this time, the elastic plate bends, which can separate the upper housing from the lower housing. When the housing needs to be closed, place the first snap-fit ​​plate in the first fixing sleeve, so that the spring snap fasteners are snapped into the first snap-fit ​​holes, and the closure can be completed. Two sets of fourth limiting frame plates are fixedly installed on the bottom side of the lower housing. The connecting pipe is placed inside the fourth limiting frame plates.Two sets of first protective pads are fixedly installed at the bottom of the upper housing. When the lower and upper housings are tightly sealed, the bottom of the first protective pads is in close contact with the outer wall of the connecting pipe, thus confining the connecting pipe within the fourth limiting frame plate and preventing it from shaking inside the housing, thus providing protection. Anti-slip side plates are attached to both outer walls of the handheld barometer to improve grip. A wrist strap is provided on its outer wall to assist in gripping the handheld barometer and prevent it from falling during use. A display screen is fixedly installed inside the handheld barometer, and four sets of buttons are provided inside. The display screen and buttons are electrically connected, and the test data can be viewed on the display screen by operating the buttons. A first fixing ring plate is fixedly installed in a hole on one side of the outer wall of the handheld barometer, and a first magnetic suction plate is fixedly installed inside the first fixing ring plate. A telescopic tube is provided inside the handheld barometer, and a first dust cover is fixedly installed at one end of the telescopic tube. A second magnetic suction plate is fixedly installed on the outer wall of one side of the first dust cover, and the second magnetic suction plate is magnetically connected to the first magnetic suction plate. A first air inlet pipe is fixedly installed on the outer wall of the other side of the first dust cover. A second air inlet pipe is fixedly installed at one end of the first air inlet pipe. A first threaded groove is opened inside the second air inlet pipe. Pulling the first dust cover separates the second magnetic suction plate from the first magnetic suction plate, causing the telescopic tube to extend and retract, thus changing the measuring distance of the first air inlet pipe. The air pressure tube is screwed into the first threaded groove to measure the air pressure value inside the tube. Four sets of universal wheels are fixedly installed on the outer wall of one side of the lower housing, allowing the entire device to be easily moved, facilitating valve inspection and maintenance work in different locations.

[0043] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A portable valve inspection and maintenance device, characterized in that, include: The lower box (10) is rectangular; The protective structure includes a first protective part and a second protective part. The first protective part includes a third limiting frame plate (27) fixedly installed on the bottom inner side of the lower box (10). A set of second limiting plates (28) are fixedly installed on both inner walls of the third limiting frame plate (27). A third limiting plate (29) is fixedly installed on one outer wall of the second limiting plate (28). An anti-slip strip (30) is pasted on one outer wall of the third limiting plate (29). A handheld barometer (33) is snapped between the two sets of anti-slip strips (30). The second protective part includes two sets of first sliding grooves (37) opened inside the handheld barometer (33). A first slider (39) is slidably installed inside the first sliding groove (37). A push plate (38) is fixedly installed between the two sets of first sliders (39).

2. The portable valve inspection and maintenance device according to claim 1, characterized in that, The second protective part also includes two sets of second limiting frame plates (25) fixedly installed on the bottom of the inner side of the lower box (10). The second limiting frame plate (25) has a first snap-fit ​​groove (26) inside. The top of the lower box (10) is provided with an upper box (11). The bottom of the upper box (11) is fixedly installed with two sets of third snap-fit ​​plates (23). The third snap-fit ​​plates (23) are snap-fitted into the inside of the first snap-fit ​​groove (26).

3. The portable valve inspection and maintenance device according to claim 2, characterized in that, A first fixing sleeve (12) is fixedly installed on one side of the outer wall of the upper box (11). A first snap-fit ​​plate (15) is slidably installed inside the first fixing sleeve (12). A first limiting plate (16) is fixedly installed on the top of the first snap-fit ​​plate (15). A second fixing sleeve (13) is fixedly installed on one side of the outer wall of the lower box (10). Two sets of first snap-fit ​​holes (14) are opened inside the second fixing sleeve (13). A second snap-fit ​​plate (17) is fixedly installed at the bottom of the first snap-fit ​​plate (15). Two sets of spring snap-fit ​​pieces (18) are provided inside the second snap-fit ​​plate (17). The spring snap-fit ​​pieces (18) are snapped into the inside of the first snap-fit ​​holes (14).

4. The portable valve inspection and maintenance device according to claim 1, characterized in that, A set of first fixing plates (19) are fixedly installed on one side of the outer wall of the lower box (10) and the upper box (11). A first fixing rod (20) is rotatably installed inside the first fixing plate (19). Two sets of first limiting frame plates (21) are sleeved between the two sets of first fixing rods (20). An elastic plate (22) is fixedly installed between the two sets of first fixing plates (19).

5. The portable valve inspection and maintenance device according to claim 1, characterized in that, Two sets of fourth limiting frame plates (31) are fixedly installed on the inner bottom of the lower box (10). A connecting pipe (32) is snapped into the inside of the fourth limiting frame plate (31). Two sets of first protective pads (24) are fixedly installed on the bottom of the upper box (11). The bottom of the first protective pads (24) is in close contact with the outer wall of the connecting pipe (32). Four sets of universal wheels (49) are fixedly installed on one side of the outer wall of the lower box (10).

6. The portable valve inspection and maintenance device according to claim 1, characterized in that, The handheld barometer (33) has a set of anti-slip side plates (35) pasted on both outer walls. The handheld barometer (33) has a wrist strap (36) on its outer wall. The handheld barometer (33) has a display screen (34) fixedly installed inside. The handheld barometer (33) has four sets of buttons (40) inside. The display screen (34) and the buttons (40) are electrically connected.

7. The portable valve inspection and maintenance device according to claim 1, characterized in that, The handheld barometer (33) has a hole on one side of its outer wall. A first fixing ring plate (41) is fixedly installed in the hole. A first magnetic suction plate (42) is fixedly installed inside the first fixing ring plate (41). A telescopic tube (43) is provided inside the handheld barometer (33). A first dust cover (44) is fixedly installed at one end of the telescopic tube (43). A second magnetic suction plate (45) is fixedly installed on one side of the outer wall of the first dust cover (44). The second magnetic suction plate (45) and the first magnetic suction plate (42) are magnetically connected. A first air inlet pipe (46) is fixedly installed on the other side of the outer wall of the first dust cover (44). A second air inlet pipe (47) is fixedly installed at one end of the first air inlet pipe (46). A first threaded groove (48) is provided inside the second air inlet pipe (47).

Images