Positive pressure type power air supply respirator

Abstract

The utility model relates to the technical field of power air supply respirators, and discloses a positive pressure type power air supply respirator which comprises a shell, a cover plate is rotationally connected to the side wall of the shell, an access port is formed in the upper surface of the shell, filter cotton is arranged in the shell, a filter box is arranged in the shell, a fixing assembly is arranged on the side wall of the shell, and the cover plate is arranged on the side wall of the shell. An adjusting assembly is arranged on the side wall of the shell, a bandage is arranged on the side wall of the shell, a clamping sleeve is fixedly connected to the side wall of the shell, a clamping block is fixedly connected to one end of the bandage, and the side wall of the clamping block is slidably connected to the interior of the clamping sleeve; the fixing assembly comprises a fixing sleeve, and the side wall of the fixing sleeve is fixedly connected to the side wall of the shell. According to the filtering device, the first clamping block is inserted into the shell, the second clamping block is extruded, the pushing spring elastically pushes the second clamping block to slide into the first clamping block, the filtering box in the shell can be rapidly and conveniently cleaned and replaced, and the practicability of the filtering device is improved through the structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to power air supply respirator technical field especially relates to a positive pressure power air supply respirator. BACKGROUND

[0002] The positive pressure power air supply respirator is a kind of personal respiratory protection equipment widely used in fire fighting, chemical industry, mine and other industries, mainly used in the dangerous environment of toxic and harmful gas, smoke, dust or oxygen deficiency, to provide clean, safe breathing air for user. With the increasing complexity of industrial production and rescue work, the performance and use convenience of respirator are also increasingly high, especially in the replacement cleaning of filter box, quick and convenient operation is crucial to protect the safety of user and improve work efficiency.

[0003] The existing positive pressure power air supply respirator is mainly composed of face mask, gas cylinder, pressure reducer, air supply valve, air filter device, fan and back support etc. Its working principle is that high-pressure air in gas cylinder enters pressure reducer through cylinder valve, and outputs medium-pressure gas after pressure reduction, and the medium-pressure gas enters face mask through air supply valve for user to breathe. Air filter device usually adopts multiple layers of filter material, such as activated carbon, HEPA filter cotton, etc., to filter the inhaled air and remove harmful substances. The fan is used to deliver filtered air into the face mask to ensure that the face mask always maintains positive pressure and prevents harmful gases from entering from outside.

[0004] When the existing positive pressure power air supply respirator needs to replace or clean the filter box, the user often needs to use screwdriver to unscrew the screw, which not only consumes time and effort, but also delays the user's replacement time of filter box in emergency, thereby affecting the normal use of respirator and the safety of user, therefore, a positive pressure power air supply respirator is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a positive pressure power air supply respirator, which aims at improving the problem that user needs to use screwdriver to unscrew the screw when replacing or cleaning the filter box in the prior art, which consumes time and effort, and delays the user's replacement time of filter box in emergency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A positive pressure power air respirator, comprising a shell, a cover plate is rotatably connected to the side wall of the shell, an access port is formed on the upper surface of the shell, filter cotton is arranged in the shell, a filter box is arranged in the shell, a fixing assembly is arranged on the side wall of the shell, an adjusting assembly is arranged on the side wall of the shell, a bandage is arranged on the side wall of the shell, a clamping sleeve is fixedly connected to the side wall of the shell, one end of the bandage is fixedly connected to a clamping block, and the side wall of the clamping block is slidably connected in the clamping sleeve;

[0008] The fixing assembly comprises a fixing sleeve fixedly connected to the side wall of the shell, a clamping block one fixedly connected to the side wall of the cover plate, a connecting rod slidably connected in the fixing sleeve, a handle fixedly connected to one end of the connecting rod, a clamping block two fixedly connected to the other end of the connecting rod, a spring arranged in the fixing sleeve, a fixing ring fixedly connected to the side wall of the connecting rod, and one end of the spring fixedly connected in the fixing sleeve and the other end of the spring fixedly connected to the side wall of the fixing ring.

[0009] Further description of the above technical solution:

[0010] The adjusting assembly comprises a mounting sleeve, a winding drum rotatably connected in the mounting sleeve, and one end of the bandage fixedly connected to the side wall of the winding drum.

[0011] Further description of the above technical solution:

[0012] The side wall of the clamping block one is slidably connected in the shell, and the side wall of the clamping block two is slidably connected in the clamping block one.

[0013] Further description of the above technical solution:

[0014] The side wall of the bandage is slidably connected in the mounting sleeve, and a fixing column is fixedly connected in the winding drum.

[0015] Further description of the above technical solution:

[0016] The side wall of the fixing column is fixedly connected to a clockwork spring piece, one end of the clockwork spring piece is fixedly connected to the bottom of the mounting sleeve, and a bottom cover is fixedly connected to the bottom of the mounting sleeve.

[0017] Further description of the above technical solution:

[0018] The side wall of the winding drum is fixedly connected to a ratchet wheel, and a pawl is rotatably connected to the upper surface of the mounting sleeve.

[0019] Further description of the above technical solution:

[0020] The ratchet wheel is clamped with the pawl, and a top cover is fixedly connected to the upper surface of the mounting sleeve.

[0021] As a further description of the above technical solutions:

[0022] The upper surface of the pawl is fixedly connected with a pulling plate, and the side wall of the pulling plate is slidingly connected in the inside of the top cover.

[0023] The utility model has the advantages of the following:

[0024] 1. In the utility model, by inserting the clamping block one into the inside of the shell, the clamping block two is extruded, the spring elasticity is pushed to push the clamping block two to slide into the inside of the clamping block one, the inside of the shell is cleaned and replaced quickly, the filter box is cleaned and replaced, when the part positive pressure type power air supply respirator needs to be replaced or cleaned, the user often needs to use screwdriver and other tools to unscrew the screw, which not only consumes time and effort, but also delays the time of the user to replace the filter box in an emergency, thereby affecting the normal use of the respirator and the safety of the user, and the practicability of the equipment is improved through the above structure.

[0025] 2. In the utility model, the winding drum is rotated by pulling the binding belt, and then the clock spring piece is retracted, the pawl is separated from the ratchet wheel by pulling the pulling plate, the binding belt is attached to the waist of the user, the quick wearing effect is achieved, and the binding belt does not need to be adjusted by spending too much energy and time, the operation difficulty is reduced, and the convenience of use is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A three-dimensional schematic view of a positive pressure type power air supply respirator is provided for the utility model;

[0027] Figure 2 A structure schematic view of the back of the shell of a positive pressure type power air supply respirator is provided for the utility model;

[0028] Figure 3 A structure schematic view of the inside of the shell of a positive pressure type power air supply respirator is provided for the utility model;

[0029] Figure 4 A structure schematic view of the shell section of a positive pressure type power air supply respirator is provided for the utility model;

[0030] Figure 5 A structure schematic view of the binding belt of a positive pressure type power air supply respirator is provided for the utility model;

[0031] Figure 6 A Figure 4 Enlarged view of A in the figure.

[0032] LEGEND:

[0033] 1, shell; 2, cover plate; 3, access; 4, filter cotton; 5, filter box; 6, fixed sleeve; 7, block one; 8, handle; 9, connecting rod; 10, block two; 11, spring; 12, fixed ring; 13, mounting sleeve; 14, bandage; 15, clamping sleeve; 16, clamping block; 17, winding drum; 18, fixed column; 19, spring piece; 20, bottom cover; 21, ratchet; 22, pawl; 23, pull plate; 24, top cover. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] Referring to Figure 1 , Figure 3 , Figure 4 and Figure 6The utility model provides an embodiment: a kind of positive pressure power air breathing apparatus, including shell 1, shell 1 plays the role of bearing and protection inside various components, shell 1 side wall is rotatably connected with cover plate 2, cover plate 2 is used to close or open shell 1, it is convenient to check, replace and clean etc. Operation to filter cotton 4 and filter box 5 inside shell 1, inlet 3 is set on the upper surface of shell 1, inlet 3 is used to connect the air delivery device outside, filter cotton 4 is provided in shell 1, filter cotton 4 can carry out preliminary filtration to the air that enters shell 1, filter box 5 is provided in shell 1, filter box 5 can further carry out depth filtration to air, remove more subtle harmful particles, dust, toxic gas etc. In air, shell 1 side wall is provided with fixed assembly, fixed assembly is mainly used to realize the stable connection between cover plate 2 and shell 1, shell 1 side wall is provided with adjusting assembly, shell 1 side wall is provided with bandage 14, bandage 14 is used to fix breathing apparatus on the body of user, shell 1 side wall is fixedly connected with clamping sleeve 15, one end of bandage 14 is fixedly connected with clamping block 16, the side wall of clamping block 16 is slidably connected in clamping sleeve 15, clamping sleeve 15 and clamping block 16 are mutually matched, form a kind of convenient connection mode, fixed assembly includes fixed sleeve 6, fixed sleeve 6 side wall is fixedly connected in shell 1 side wall, play the role of fixed connecting rod 9, spring 11 etc. Component, the side wall of cover plate 2 is fixedly connected with clamping block one 7, connecting rod 9 is slidably connected in fixed sleeve 6, one end of connecting rod 9 is fixedly connected with handle 8, the other end of connecting rod 9 is fixedly connected with clamping block two 10, spring 11 is provided in fixed sleeve 6, connecting rod 9 side wall is fixedly connected with fixed ring 12, one end of spring 11 is fixedly connected in fixed sleeve 6, the other end of spring 11 is fixedly connected in fixed ring 12 side wall, fixed ring 12 is used to limit the position of spring 11, the side wall of clamping block one 7 is slidably connected in shell 1, the side wall of clamping block two 10 is slidably connected in clamping block one 7, realize the close, reliable connection between cover plate 2 and shell 1 by this nested type sliding connection mode, simultaneously, it is convenient to carry out dismounting operation when needed again;

[0036] When the filter cotton 4 and the filter box 5 inside the device need to be cleaned after long-term use, the handle 8 is pulled, and the handle 8 provides an easy-to-operate force point for the operator, facilitating the application of pulling force, so that the connecting rod 9 slides, the connecting rod 9 plays a role in transmitting power, and the pulling force generated by pulling the handle 8 is transmitted to the subsequent components, the spring 11 is extruded by the fixing ring 12, the spring 11 has elasticity and can provide a certain elastic force to keep the clamping block two 10 in the position of clamping with the clamping block one 7, and when extruded by the fixing ring 12, the spring 11 will be elastically deformed to store elastic potential energy, so that the clamping block two 10 is separated from the inside of the clamping block one 7, the clamping block two 10 and the clamping block one 7 cooperate to fix, when the clamping block two 10 is in the clamping block one 7, it can ensure that some structures of the device are in a stable state to prevent loosening, and when the clamping block two 10 is separated from the inside of the clamping block one 7, the fixing effect of the clamping block one 7 is released, and at this time the clamping block one 7 loses the constraint of the clamping block two 10. At this time, the cover plate 2 is pushed outward and rotated, and the cover plate 2 plays a role in closing and protecting the internal components of the shell 1, and the cover plate 2 is opened by pushing outward and rotating, so that the clamping block one 7 slides out of the inside of the shell 1, and the clamping block one 7 may play a role in positioning or fixing some components in the shell 1, when it slides out of the inside of the shell 1, the structure of the device will be changed, so as to achieve that the shell 1 is convenient for quickly cleaning and replacing the filter cotton 4 and the filter box 5 inside, the shell 1 is the shell of the entire device, which provides a space for containing and protecting various internal components, so that they can run stably, through the above operation, the filter cotton 4 and the filter box 5 inside are convenient for cleaning and replacing, and the maintenance convenience and running stability of the device are improved.

[0037] Referring to Figure 2 and Figure 5The adjusting assembly comprises a mounting sleeve 13, which mainly provides mounting positions and support for other components, and a winding drum 17 rotatably connected inside the mounting sleeve 13, which can rotate inside the mounting sleeve 13 to realize winding and releasing of the bandage 14. One end of the bandage 14 is fixedly connected to the side wall of the winding drum 17, which can be wound on the winding drum 17, and the side wall of the bandage 14 is slidably connected inside the mounting sleeve 13, so that the movement track of the bandage 14 during operation is stable, and the bandage 14 is prevented from shaking or deviating at will. The winding drum 17 is fixedly connected with a fixing column 18 inside, which serves to stabilize the structure of the winding drum 17 and provide support. The side wall of the fixing column 18 is fixedly connected with a spring piece 19, one end of which is fixedly connected to the bottom of the mounting sleeve 13. The spring piece 19 can store and release elastic potential energy. The bottom of the mounting sleeve 13 is fixedly connected with a bottom cover 20, which mainly serves to seal and protect the bottom of the mounting sleeve 13. The side wall of the winding drum 17 is fixedly connected with a ratchet wheel 21, which can rotate together with the winding drum 17, and mainly serves to cooperate with a pawl 22 to control the rotating direction of the winding drum 17 and prevent the winding drum 17 from reversing at will under the action of the elastic potential energy of the spring piece 19. The upper surface of the mounting sleeve 13 is rotatably connected with the pawl 22, which is engaged with the ratchet wheel 21. The upper surface of the mounting sleeve 13 is fixedly connected with a top cover 24, which serves to seal and protect the upper surface of the mounting sleeve 13. The upper surface of the pawl 22 is fixedly connected with a pulling plate 23, which can facilitate operation of the pawl 22 to make it disengage from the ratchet wheel 21, so as to realize releasing of the bandage 14. The side wall of the pulling plate 23 is slidably connected inside the top cover 24, so that the stability and accuracy of the pulling plate 23 during operation are ensured, and the pulling plate 23 is prevented from being dislocated or stuck.

[0038] When wearing the device, the binding belt 14 is pulled and the clamping block 16 is inserted into the clamping sleeve 15 to fix it. The function of the binding belt 14 is to fix the device on the user's body, ensuring that the device will not loosen or fall off during use. The clamping block 16 is a connecting component at one end of the binding belt 14, used in cooperation with the clamping sleeve 15 to realize the fixing function of the binding belt 14. The clamping sleeve 15 is a component matched with the clamping block 16, and the combination of the two can ensure the fixing firmness of the binding belt 14. During the process of pulling the binding belt 14, the winding drum 17 will rotate. The main function of the winding drum 17 is to wind or release the binding belt 14, which can rotate under the pulling of the binding belt 14, thereby adjusting the length of the binding belt 14, and then allowing the fixing column 18 to tighten the spring leaf 19. The fixing column 18 serves to support and connect the spring leaf 19, ensuring the stability of the position of the spring leaf 19. The spring leaf 19 has elasticity and will store elastic potential energy when it is tightened, providing power for subsequent operations. At this time, the pawl 22 is separated from the ratchet wheel 21 by turning the pulling plate 23. When the pawl 22 is engaged with the ratchet wheel 21, the rotation of the winding drum 17 can be limited to prevent it from rotating in the opposite direction. After separating them, the fixing effect on the winding drum 17 is released, so that the winding drum 17 can rotate freely. At this time, the winding drum 17 is pulled in the opposite direction by the tension of the spring leaf 19, and the elastic potential energy stored in the spring leaf 19 is converted into the power for the rotation of the winding drum 17, thereby winding the binding belt 14, so that the binding belt 14 slowly adheres to the user's waist. This can automatically adjust the length of the binding belt 14 to adapt to the size of the user's waist and provide appropriate tightness. Then, the pulling plate 23 is loosened again to make the pawl 22 engage with the ratchet wheel 21 again, so that the rotation of the winding drum 17 is limited in one direction, achieving the effect of quickly wearing the device without repeatedly adjusting the tightness of the binding belt 14, thereby improving the convenience and efficiency of wearing the device. At the same time, it ensures that the tightness of the binding belt 14 during use is kept in a suitable state, avoiding the influence of the normal use and user experience of the device due to the loosening or tightness of the binding belt 14.

[0039] Working principle: when the filter cotton 4 and the filter box 5 inside the device need to be cleaned after long-term use, pull the handle 8 to make the connecting rod 9 slide, the spring 11 is extruded by the fixing ring 12, the clamping block two 10 is separated from the clamping block one 7, the fixing effect of the clamping block one 7 is released, at this time, the cover plate 2 is pushed outward and rotated, then the clamping block one 7 slides out of the shell 1, so that the shell 1 is convenient for quickly cleaning and replacing the filter cotton 4 and the filter box 5 inside, when wearing the device, pull the belt 14 and insert the clamping block 16 into the clamping sleeve 15 to fix, the winding drum 17 is rotated in the process of pulling the belt 14, then the fixing column 18 tightens the clock spring 19, at this time, the pawl 22 is separated from the ratchet wheel 21 by pulling the pulling plate 23, the fixing effect is released, then the winding drum 17 is pulled in the opposite direction by the pulling force of the clock spring 19, then the belt 14 is wound, the belt 14 is slowly attached to the waist of the user, then the pulling plate 23 is loosened, the pawl 22 and the ratchet wheel 21 are clamped again, the effect of quickly wearing the device without repeatedly adjusting the tightness of the belt 14 is achieved.

[0040] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A positive pressure powered air respirator comprising a housing (1) characterised in that: The shell (1) side wall rotationally connected with the cover plate (2), the shell (1) upper surface is provided with access (3), the shell (1) inside is provided with filter cotton (4), the shell (1) inside is provided with filter box (5), the shell (1) side wall is provided with fixed assembly, the shell (1) side wall is provided with adjusting assembly, the shell (1) side wall is provided with bandage (14), the shell (1) side wall is fixedly connected with the clamping sleeve (15), one end of the bandage (14) is fixedly connected with the clamping block (16), the clamping block (16) side wall is connected in the clamping sleeve (15) inside slidingly connected; The fixed assembly comprises a fixed sleeve (6), the fixed sleeve (6) side wall is fixedly connected in the shell (1) side wall, the cover plate (2) side wall is fixedly connected with the clamping block one (7), the fixed sleeve (6) inside is slidably connected with the connecting rod (9), one end of the connecting rod (9) is fixedly connected with the handle (8), the other end of the connecting rod (9) is fixedly connected with the clamping block two (10), the fixed sleeve (6) inside is provided with spring (11), the connecting rod (9) side wall is fixedly connected with the fixed ring (12), one end of the spring (11) is fixedly connected in the fixed sleeve (6) inside, the other end of the spring (11) is fixedly connected in the fixed ring (12) side wall.

2. A positive pressure powered air respirator according to claim 1, wherein: The adjusting assembly comprises a mounting sleeve (13), the mounting sleeve (13) inside rotationally connected with the winding drum (17), one end of the bandage (14) is fixedly connected in the winding drum (17) side wall.

3. A positive pressure powered air respirator according to claim 1, wherein: The clamping block one (7) side wall is slidably connected in the shell (1) inside, the clamping block two (10) side wall is slidably connected in the clamping block one (7) inside.

4. A positive pressure powered air respirator according to claim 2, wherein: The bandage (14) side wall is slidably connected in the mounting sleeve (13) inside, the winding drum (17) inside is fixedly connected with the fixed column (18).

5. A positive pressure powered air respirator according to claim 4, wherein: The fixed column (18) side wall is fixedly connected with the clockwork spring piece (19), one end of the clockwork spring piece (19) is fixedly connected in the mounting sleeve (13) bottom, the mounting sleeve (13) bottom is fixedly connected with the bottom cover (20).

6. A positive pressure powered air respirator according to claim 2, wherein: The winding drum (17) side wall is fixedly connected with the ratchet wheel (21), the mounting sleeve (13) upper surface rotationally connected with the pawl (22).

7. A positive pressure powered air respirator according to claim 6, wherein: The ratchet wheel (21) and the pawl (22) are engaged, the mounting sleeve (13) upper surface is fixedly connected with the top cover (24).

8. A positive pressure powered air respirator according to claim 7, wherein: The pawl (22) upper surface is fixedly connected with the pulling plate (23), the pulling plate (23) side wall is slidably connected in the top cover (24) inside.

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