Extensible verification cover of alarm

Abstract

The extensible verification cover comprises a telescopic rod, a cover shell, a gas cylinder and a gas cylinder bearing device, the telescopic rod and the cover shell are connected through a connector mechanism, a gas channel is formed in the telescopic rod, and a sealing film is installed in the cover shell; a gas outlet of the gas cylinder is connected with the gas channel, and the gas cylinder is matched with the gas cylinder bearing device. The sealing film can be better covered outside the alarm through the elasticity of the sealing film to effectively wrap the detected alarm, so that the standard gas can quickly reach the detection concentration around the detected alarm, and the purpose of saving the standard gas is achieved. And through the cooperation of the housing, the possibility of gas leakage is reduced, so that the output gas can better act on the alarm. Through the arrangement of the backpack type gas cylinder carrying device, an operator can complete the test of a detected alarm anytime and anywhere according to the needs. Or a trolley for bearing a gas cylinder is arranged and can be matched with the telescopic rod and the housing to complete the verification of the alarm.

Description

Technical Field

[0001] The utility model relates to the technical field of alarm detection, in particular to a movable and extendable detection cover for an alarm. Background Art

[0002] After the alarm is produced, its working stability needs to be tested. If it is placed in an environment filled with dangerous gases and then the alarm is tested, this part of the dangerous gas will not only pose a safety hazard but will also cause waste.

[0003] To this end, it is necessary to design a device that is easy to carry and can effectively wrap the alarm under test anytime and anywhere, so that the standard gas can quickly reach the detection concentration around the device under test, to solve the above problems. Utility Model Content

[0004] The utility model aims to provide an extendable calibration cover for an alarm, thereby realizing the purpose of saving calibration gas. All connecting parts adopt a self-closing structure to ensure that the gas will not leak out.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an extendable calibration cover of an alarm, comprising a telescopic rod, a cover shell, a gas cylinder and a gas cylinder carrying device, the telescopic rod and the cover shell are connected by a joint mechanism, an airway is opened in the telescopic rod, and a sealing film is installed in the cover shell; the air outlet of the gas cylinder is connected to the airway, and the gas cylinder cooperates with the gas cylinder carrying device.

[0006] Compared with the prior art, the beneficial effects of the utility model are:

[0007] The elasticity of the sealing film enables it to be better covered outside the alarm, effectively wrapping the alarm under test, so that the standard gas can quickly reach the detection concentration around the meter under test, thereby achieving the purpose of saving standard gas. And through the cooperation of the cover, the possibility of gas leakage is reduced, so that the output gas can better act on the alarm.

[0008] By setting up a backpack-type gas cylinder carrying device, the operator can complete the test of the alarm to be tested anytime and anywhere as needed; or by setting up a trolley for carrying the gas cylinder, while facilitating its movement, it can also cooperate with the telescopic rod and cover to complete the calibration of the alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the extendable detection cover of the alarm of the utility model.

[0010] Figure 2 It is a cross-sectional view of the calibration cover shell of the utility model.

[0011] Figure 3It is a three-dimensional diagram of the calibration cover shell of the utility model.

[0012] Figure 4 It is a schematic diagram of the angle joint of the utility model.

[0013] Figure 5 It is a schematic diagram of the gas cylinder carrying device of the utility model.

[0014] Figure 6 This is a schematic diagram of a gas cylinder carrying device according to another embodiment of the present invention.

[0015] Figure 7 This is a top view of an upper mounting ring according to another embodiment of the present invention.

[0016] 1. Telescopic rod; 2. Airway; 3. Cover; 31. Outer shell; 32. Inner shell; 33. Ring cover; 4. Bendable joint; 5. Angle joint; 6. Sealing membrane; 7. Gas cylinder; 8. First receiving seat; 81. Strap; 82. Shoulder strap; 83. Waist strap; 9. Second receiving seat; 91. Handle; 92. Roller; 10. Upper mounting ring; 11. Lower base; 12. Connecting rod; 13. Auxiliary limiting ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-5 The utility model provides a technical solution: an extendable test cover of an alarm, comprising a telescopic rod 1, a cover shell 3, a gas cylinder 7 and a gas cylinder carrying device, wherein the telescopic rod 1 and the cover shell 3 are connected by a joint mechanism, and the joint can be selected according to the alarm to be tested. Specifically, the joint mechanism is a bendable joint 4 or an angle joint 5. An airway 2 is provided in the telescopic rod 1, and a valve is provided in the airway 2 to facilitate the supply of experimental gas to the cover shell 3 at an appropriate time.

[0019] The sealing film 6 is installed in the housing 3. The housing 3 includes an outer shell 31 and an inner shell 32 connected to each other. Both are trumpet-shaped, and the sealing film 6 is specifically installed between the outer shell 31 and the inner shell 32. In order to ensure that the sealing film 6 is installed more tightly, the housing 3 also includes an annular cover 33. The annular cover 33 covers the port of the outer shell 31, and the sealing film 6 is placed between the annular cover 33 and the outer shell 31, thereby pressing the sealing film 6. When in use, the elasticity of the sealing film 6 enables it to be better covered outside the alarm, effectively wrapping the alarm to be tested, so that the standard gas quickly reaches the detection concentration around the tested alarm, thereby achieving the purpose of saving standard gas.

[0020] In order to make it easier for operators to carry the gas cylinder 7 and test the alarms at different locations, the gas outlet of the gas cylinder 7 is connected to the airway 2 in the telescopic rod 1, and the two can be connected by a hose, and the gas cylinder 7 cooperates with the gas cylinder carrying device. Figure 5 As shown, the gas cylinder carrying device includes a first receiving seat 8, the gas cylinder 7 is fixed on the receiving seat 8 by a strap 81, and a shoulder strap mechanism is installed on the receiving seat 8. The shoulder strap mechanism is similar to a schoolbag, and includes a shoulder strap 82 and a waist strap 83, and the shoulder strap 82 and the waist strap 83 are both installed on the receiving seat 8. The operator can carry the gas cylinder 7 by wearing the shoulder strap 82 and the waist strap 83, and hold the telescopic rod 1 to complete the alarm test at various positions.

[0021] Working principle: After the alarm has been used for a period of time, it needs to be tested for sensitivity to ensure that it can correctly sound the alarm in a dangerous gas environment. If the alarm is placed in a large-scale test gas environment, it will not only face the problem of disassembly and assembly, but also waste gas. Therefore, a device that can complete the test anytime and anywhere is needed to perform safety tests on it.

[0022] When in use, the operator carries the receiving seat 8 on his back and carries a gas cylinder 7 to connect it to the gas inlet of the telescopic rod 1. During the test, the cover 3 is aligned with the alarm to be tested, and the sealing film 6 is in close contact with the alarm and effectively wraps it. The valve is opened to supply gas, and the gas will be output to the outside of the alarm along the gas cylinder 7, the telescopic rod 1, the joint mechanism and the cover 3, and the alarm is tested. After that, it is only necessary to observe the specific situation of the alarm.

[0023] See also Figure 6-7The utility model also provides another technical solution, which is different from the above technical solution in that: the gas cylinder carrying device includes a second receiving seat 9, a handle 91 is provided on the top of the second receiving seat 9, and a roller 92 is provided on the bottom of the second receiving seat 9, so that the operator can push the second receiving seat 9 and the gas cylinder thereon. A gas cylinder fixing mechanism is detachably mounted on the second receiving seat 9, and the gas cylinder fixing mechanism includes an upper mounting ring 10 and a lower base 11, and the upper mounting ring 10 and the lower base 11 are connected by a pair of connecting rods 12, and the upper mounting ring 10 is detachably mounted on the second receiving seat 9. A gas cylinder 7 can be placed in the upper mounting ring 10 and contained by the lower base 11, so that the second receiving seat 9 is normally moved and the gas cylinder 7 will not fall over.

[0024] If multiple gas cylinders are to be placed, multiple mechanisms are required to limit the position of the gas cylinders. An auxiliary limiting ring 13 is rotatably connected to the connecting rod 12. Figure 7 As shown, an auxiliary limiting ring 13 is provided on each of the two connecting rods 12, and the two are provided at different heights. When not in use, the auxiliary limiting ring 13 can be overlapped with the upper mounting ring 10; when the second receiving seat 9 needs to carry multiple gas cylinders 7, the auxiliary limiting ring 13 can be unfolded, so that the three gas cylinders 7 can be stably placed.

[0025] 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. An extendable detection cover for an alarm, characterized in that: The invention comprises a telescopic rod (1), a cover (3), a gas cylinder (7) and a gas cylinder carrying device, wherein the telescopic rod (1) and the cover (3) are connected via a joint mechanism, an air passage (2) is provided in the telescopic rod (1), and a sealing film (6) is installed in the cover (3); The gas outlet of the gas cylinder (7) is connected to the gas channel (2), and the gas cylinder (7) cooperates with the gas cylinder carrying device.

2. The extendable detection cover of the alarm according to claim 1 is characterized in that: A valve is provided in the airway (2).

3. The extendable detection cover of the alarm according to claim 1 is characterized in that: The joint mechanism is a bendable joint (4) or an angled joint (5).

4. The extendable detection cover of the alarm according to claim 1 is characterized in that: The housing (3) comprises an outer shell (31) and an inner shell (32) which are connected to each other, and a sealing membrane (6) is installed between the outer shell (31) and the inner shell (32).

5. The extendable detection cover of the alarm according to claim 4, characterized in that: The housing (3) further comprises an annular cover (33), wherein the annular cover (33) covers the port of the housing (31), and a sealing film (6) is disposed between the annular cover (33) and the housing (31).

6. The extendable detection cover of the alarm according to claim 1, characterized in that: The gas cylinder carrying device comprises a first receiving seat (8), the gas cylinder (7) is fixed on the receiving seat (8) by means of a strap (81), and a shoulder strap mechanism is installed on the receiving seat (8).

7. The extendable detection cover of the alarm according to claim 1, characterized in that: The gas cylinder carrying device comprises a second receiving seat (9), a handle (91) is provided on the top of the second receiving seat (9), a roller (92) is provided on the bottom of the second receiving seat (9), and a gas cylinder fixing mechanism is detachably mounted on the second receiving seat (9).

8. The extendable detection cover of the alarm according to claim 6, characterized in that: The shoulder strap mechanism comprises a shoulder strap (82) and a waist strap (83), and the shoulder strap (82) and the waist strap (83) are both installed on the receiving seat (8).

9. The extendable detection cover of the alarm according to claim 7, characterized in that: The gas cylinder fixing mechanism comprises an upper mounting ring (10) and a lower base (11), wherein the upper mounting ring (10) and the lower base (11) are connected via a pair of connecting rods (12), and the upper mounting ring (10) is detachably mounted on the second receiving seat (9).

10. The extendable detection cover of the alarm according to claim 9, characterized in that: An auxiliary limiting ring (13) is rotatably connected to the connecting rod (12).

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