A quick disconnect device for a positive pressure respirator

Abstract

The utility model relates to personal protection equipment technical field discloses a quick detachable device for positive pressure respirator, and the device includes gas supply pipe no. one, gas supply pipe no. two, quick detachable mechanism and sealing mechanism. The quick detachable mechanism includes fixed block fixed in the outer wall of gas supply pipe no. one, locking axle and locking lever of rotation connection in fixed block, and the quick locking and release of gas supply pipe no. two can be realized through the rotation locking lever. The sealing mechanism includes fixed plate, lower pressure plate, sealing cover and torsional spring, when gas supply pipe no. two and gas supply pipe no. one separate, the elastic force of torsional spring automatically drives lower pressure plate, and then drives sealing cover reset through fixed rod to close the port of gas supply pipe no. one. The utility model solves the problem that the respirator pipeline is complicated and separates after the separation and is easy to leak gas in the prior art through the cooperation of quick detachable mechanism and automatic sealing mechanism, has the effect that disassembling is quick, sealing is reliable, safe and convenient.

Description

Technical Field

[0001] This utility model relates to the field of personal protective equipment technology, and in particular to a quick disassembly device for a positive pressure respirator. Background Technology

[0002] Positive pressure breathing apparatus (PPB) is a critical personal protective equipment for protecting the respiratory safety of workers in fields such as firefighting, chemical engineering, and disaster relief. It isolates users from toxic and harmful gases by providing continuous positive pressure clean air into the full-face mask, thus ensuring the user's safety.

[0003] In practical use, it is often necessary to connect or disconnect the air supply pipe of the full-face mask from the main air supply pipe output by the pressure reducer, for example, when changing gas cylinders or temporarily leaving a contaminated area. Currently, threaded connectors are commonly used to secure these types of pipes.

[0004] However, threaded connections require the operator to rotate multiple times to lock or loosen them, a process that is excessively time-consuming in the fast-paced environment of a rescue operation. This is especially true when the user is wearing heavy gloves or in low-light conditions, making it extremely difficult to align the threads and rotate, severely impacting operational efficiency.

[0005] More critically, when the air supply tube is disassembled via the threaded connector, the air supply port from the gas cylinder is instantly open. Because the cylinder still contains pressure, gas will continue to leak out, wasting valuable breathing air and shortening effective working time. This leakage can also cause noise pollution and even pose safety hazards in certain environments. Current technology lacks a connection device that effectively integrates quick disassembly with automatic port sealing, which has become a significant technical bottleneck restricting the convenience and safety of positive pressure respirators. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a quick disassembly device for positive pressure breathing apparatus, which aims to improve the problems of inconvenient disassembly and assembly of pipeline connection devices for positive pressure breathing apparatus and the inability to automatically seal the port after separation, resulting in gas leakage. This utility model aims to provide a quick disassembly device for positive pressure breathing apparatus with an improved structure that can effectively solve the above problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a quick disassembly device for a positive pressure respirator, comprising: a first air supply pipe, and a second air supply pipe detachably connected to the port of the first air supply pipe; as well as a quick disassembly mechanism and a sealing mechanism.

[0008] The quick-release mechanism includes a first fixing block fixed to the outer wall of the first air supply pipe and a second fixing block fixed to the inner wall of the first air supply pipe; a locking shaft is rotatably connected to the first fixing block, and a locking lever for locking or releasing the second air supply pipe is rotatably connected to the locking shaft.

[0009] Furthermore, the sealing mechanism includes a fixing plate fixed to the outer wall of the first air supply pipe; a pin is rotatably connected to the fixing plate; a lower pressure plate is rotatably connected to the pin; a sealing cover is connected to the lower pressure plate via a fixing rod; the sealing cover is disposed at the port of the first air supply pipe; a torsion spring is sleeved on the pin, and the two ends of the torsion spring abut against the fixing plate and the lower pressure plate respectively, so that when the second air supply pipe is separated from the first air supply pipe, the sealing cover is pushed by the lower pressure plate and the fixing rod to close the port of the first air supply pipe.

[0010] Preferably, the outer wall of the second air supply pipe has a longitudinal groove for selectively engaging the second fixing block and the locking lever.

[0011] Preferably, the locking lever has a large arc profile and a small arc profile; when the locking lever is rotated to the locked position, the large arc profile radially abuts against the groove wall of the longitudinal groove; when the locking lever is rotated to the released position, a gap is formed between the small arc profile and the groove wall of the longitudinal groove, allowing the air supply pipe to move axially.

[0012] Preferably, the quick-release mechanism further includes a sealing ring, which is embedded in an annular groove opened at the end face of the air supply pipe.

[0013] Preferably, a second sealing ring is fixed on the end face of the sealing cover, and the outer diameter of the second sealing ring is adapted to the inner diameter of the first air supply pipe to form a sealing fit.

[0014] Preferably, one end of the fixing rod is fixedly connected to the top of the sealing cover, and the other end of the fixing rod is rotatably connected to the pin.

[0015] Preferably, the input end of the gas supply pipe is connected to a pressure reducer, and the input end of the pressure reducer is connected to a gas cylinder.

[0016] Preferably, the output end of the second air supply pipe is connected to a full-face mask.

[0017] This utility model has the following beneficial effects:

[0018] 1. In this utility model, by setting up a quick-release mechanism composed of a locking lever, a locking shaft and a fixing block, the problem that the respirator tubing in the prior art mostly uses threaded connections, the disassembly and assembly process is cumbersome and time-consuming, and it is not convenient to operate quickly in emergency situations is solved. The technical effect of quickly disassembling and assembling the air supply tubing by hand is achieved, which greatly improves the convenience of use and the efficiency of emergency response.

[0019] 2. This utility model solves the problem in the prior art where the gas source port is open after pipeline separation, leading to continuous gas leakage and waste, and posing safety hazards, by setting a sealing mechanism composed of a sealing cover, a lower pressure plate, and a torsion spring. It achieves the technical effect of automatically sealing the gas source port at the moment of disassembly, effectively saving valuable gas resources and improving the overall safety of the device. Attached Figure Description

[0020] Figure 1 This is a perspective view of a quick disassembly device for a positive pressure respirator proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of a locking lever for a quick disassembly device for a positive pressure respirator proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of a sealing cover for a quick-release device for a positive pressure respirator proposed in this utility model;

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0024] Legend:

[0025] 1. Gas cylinder; 2. Pressure regulator; 3. Gas supply pipe one; 4. Full face mask; 5. Quick release mechanism; 501. Gas supply pipe two; 502. Fixing block one; 503. Locking lever; 504. Locking shaft; 505. Fixing block two; 506. Sealing ring one; 6. Sealing mechanism; 601. Sealing cover; 602. Sealing ring two; 603. Lower pressure plate; 604. Fixing rod; 605. Pin; 606. Fixing plate; 607. Torsion spring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please refer to Figures 1 to 4This utility model provides a quick disassembly device for positive pressure respirators, which aims to solve the problem that the existing positive pressure respirator's air supply pipeline connection structure is inconvenient to disassemble and assemble, and the port cannot be automatically sealed after separation, resulting in gas leakage.

[0028] like Figure 1 As shown, the quick-release device for a positive pressure respirator includes an air supply tube 3 and an air supply tube 501 detachably connected to the port of the air supply tube 3. The device also includes a quick-release mechanism 5 and a sealing mechanism 6. In a specific application environment, the input end of the air supply tube 3 is connected to a pressure reducer 2, the input end of the pressure reducer 2 is connected to a gas cylinder 1, and the output end of the air supply tube 501 is connected to a full face mask 4.

[0029] The quick-release mechanism 5 includes a fixing block 502 fixed to the outer wall of the air supply pipe 3 and a fixing block 505 fixed to the inner wall of the air supply pipe 3. A locking shaft 504 is rotatably connected to the fixing block 502, and a locking lever 503 for locking or releasing the air supply pipe 501 is rotatably connected to the locking shaft 504.

[0030] The sealing mechanism 6 includes a fixing plate 606 fixed to the outer wall of the air supply pipe 3. A pin 605 is rotatably connected to the fixing plate 606. A lower pressure plate 603 is rotatably connected to the pin 605. A sealing cover 601 is connected to the lower pressure plate 603 through a fixing rod 604. The sealing cover 601 is disposed at the port of the air supply pipe 3. A torsion spring 607 is sleeved on the pin 605. The two ends of the torsion spring 607 abut against the fixing plate 606 and the lower pressure plate 603 respectively, so that when the air supply pipe 501 is separated from the air supply pipe 3, the sealing cover 601 is pushed by the lower pressure plate 603 and the fixing rod 604 to close the port of the air supply pipe 3.

[0031] The outer wall of the second air supply pipe 501 has a longitudinal groove for selectively engaging the second fixing block 505 and the locking lever 503. The locking lever 503 has a large arc profile and a small arc profile. When the locking lever 503 is rotated to the locked position, the large arc profile of the locking lever 503 radially abuts against the groove wall of the longitudinal groove. At this time, the second air supply pipe 501 is axially limited and cannot be separated from the first air supply pipe 3. When the locking lever 503 is rotated to the released position, the small arc profile of the locking lever 503... A gap is formed between the contour and the groove wall of the longitudinal groove, allowing the second air supply pipe 501 to move axially. At this time, the second air supply pipe 501 can be easily disassembled. This structure, which changes the contact contour by rotating the locking lever 503, ensures the reliability of the connection and the quickness of disassembly. The quick-release mechanism 5 also includes a sealing ring 506, which is embedded in the annular groove opened on the end face of the first air supply pipe 3, and is used to provide a reliable gas seal when the first air supply pipe 3 and the second air supply pipe 501 are connected.

[0032] As a preferred embodiment, please refer to Figure 3 and Figure 4 To further enhance the automatic sealing effect of the sealing mechanism 6, a sealing ring 602 is fixed on the end face of the sealing cover 601. The outer diameter of the sealing ring 602 is adapted to the inner diameter of the air supply pipe 3 to form a sealing fit. When the sealing cover 601 closes the port of the air supply pipe 3 under the action of the torsion spring 607, the sealing ring 602 can fit tightly against the inner wall of the air supply pipe 3, thereby preventing gas leakage.

[0033] As another preferred embodiment, in order to ensure that the lower pressure plate 603 can stably drive the sealing cover 601 to move, one end of the fixing rod 604 is fixedly connected to the top of the sealing cover 601, and the other end of the fixing rod 604 is rotatably connected to the pin 605. This connection method constitutes a lever mechanism, which can effectively transmit pressure to the sealing cover 601 when the lower pressure plate 603 is pressed, so that it can be lifted or reset smoothly.

[0034] Working principle: When it is necessary to detach the second air supply pipe 501 from the first air supply pipe 3, the operator first lifts the locking lever 503 upwards, causing the locking lever 503 to rotate around the locking shaft 504. The large arc contour of the locking lever 503 rotates open, and the small arc contour rotates to a position opposite to the longitudinal groove of the second air supply pipe 501. At this time, the radial locking of the second air supply pipe 501 is released. Then, the second air supply pipe 501 is pulled upwards, and the second air supply pipe 501 can be quickly separated from the first air supply pipe 3. At the moment the second air supply pipe 501 is separated, the lower pressure plate 603, which was previously lifted by the end of the second air supply pipe 501, loses its support. The elastic energy stored in the torsion spring 607 is immediately released. The elastic force of the torsion spring 607 pushes the lower pressure plate 603 to rotate around the pin 605. The lower pressure plate 603 drives the sealing cover 601 to quickly reset through the fixing rod 604. The sealing ring 602 on the sealing cover 601 is tightly pressed against the inner wall of the port of the first air supply pipe 3, thereby achieving automatic sealing of the first air supply pipe 3.

[0035] When it is necessary to connect the second air supply pipe 501 to the first air supply pipe 3, the operator first presses down the lower pressure plate 603. The lower pressure plate 603 overcomes the elastic force of the torsion spring 607 and drives the sealing cover 601 to rise upward through the fixing rod 604, opening the port channel of the first air supply pipe 3. Then, the second air supply pipe 501 is inserted into the port of the first air supply pipe 3, and the sealing ring 506 is properly pressed. Finally, the locking lever 503 is pressed down, so that the large arc contour of the locking lever 503 rotates and is locked into the longitudinal groove of the second air supply pipe 501, completing the reliable locking of the second air supply pipe 501. At this time, the device resumes the air supply state.

Claims

1. A quick-release device for a positive pressure respirator, characterized in that, The device includes an air supply pipe one (3) and an air supply pipe two (501) detachably connected to the port of the air supply pipe one (3); the device is characterized in that it also includes a quick-release mechanism (5) and a sealing mechanism (6). The quick-release mechanism (5) includes a fixing block 1 (502) fixed to the outer wall of the first air supply pipe (3) and a fixing block 2 (505) fixed to the inner wall of the first air supply pipe (3); a locking shaft (504) is rotatably connected to the first fixing block (502), and a locking lever (503) for locking or releasing the second air supply pipe (501) is rotatably connected to the locking shaft (504). The sealing mechanism (6) includes a fixing plate (606) fixed to the outer wall of the first air supply pipe (3); a pin (605) is rotatably connected to the fixing plate (606); a lower pressure plate (603) is rotatably connected to the pin (605); a sealing cover (601) is connected to the lower pressure plate (603) via a fixing rod (604); the sealing cover (601) is disposed at the port of the first air supply pipe (3); a torsion spring (607) is sleeved on the pin (605), and the two ends of the torsion spring (607) abut against the fixing plate (606) and the lower pressure plate (603) respectively, so that when the second air supply pipe (501) is separated from the first air supply pipe (3), the sealing cover (601) is pushed by the lower pressure plate (603) and the fixing rod (604) to close the port of the first air supply pipe (3).

2. The quick disassembly device for a positive pressure respirator according to claim 1, characterized in that, The outer wall of the second air supply pipe (501) has a longitudinal groove for selectively engaging the second fixing block (505) and the locking lever (503).

3. A quick disassembly device for a positive pressure respirator according to claim 2, characterized in that, The locking lever (503) has a large arc profile and a small arc profile; when the locking lever (503) is rotated to the locked position, the large arc profile radially abuts against the groove wall of the longitudinal groove; when the locking lever (503) is rotated to the released position, a gap is formed between the small arc profile and the groove wall of the longitudinal groove, allowing the second air supply pipe (501) to move axially.

4. A quick disassembly device for a positive pressure respirator according to claim 1, characterized in that, The quick-release mechanism (5) also includes a sealing ring (506), which is embedded in an annular groove on the end face of the air supply pipe (3).

5. A quick disassembly device for a positive pressure respirator according to claim 1, characterized in that, A second sealing ring (602) is fixed on the end face of the sealing cover (601). The outer diameter of the second sealing ring (602) is adapted to the inner diameter of the first air supply pipe (3) to form a sealing fit.

6. A quick disassembly device for a positive pressure respirator according to claim 1, characterized in that, One end of the fixing rod (604) is fixedly connected to the top of the sealing cover (601), and the other end of the fixing rod (604) is rotatably connected to the pin (605).

7. A quick disassembly device for a positive pressure respirator according to claim 1, characterized in that, The input end of the gas supply pipe (3) is connected to a pressure reducer (2), and the input end of the pressure reducer (2) is connected to a gas cylinder (1).

8. A quick disassembly device for a positive pressure respirator according to claim 1, characterized in that, The output end of the second air supply pipe (501) is connected to a full-face mask (4).

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