Breathing cap with overpressure protection
By adding a protective valve assembly to the top of the breathing cap, the problem of excessive pressure inside the filter element caused by excessive oil mist flow is solved, thereby improving the safety and stability of the breathing cap and ensuring the normal operation of the equipment.
Patent Information
- Application Number
- CN202520886214.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-05-07
AI Technical Summary
Existing breathing caps, when used, can easily lead to excessive pressure inside the filter element when the oil mist flow is too high, affecting the filtration effect and equipment stability, and posing a safety hazard.
A protective valve is added to the top of the breathing cap. The valve is opened by pressure to release pressure and stabilize the pressure inside the filter element. The design of components such as the protective valve, valve stem, valve plate, spring seat and spring, together with the perforated plate and protective cover, realizes overpressure protection.
This improves the safety and stability of the breathing cap, prevents excessive pressure inside the filter element, and ensures the normal operation and safe use of the equipment.
Smart Images
Figure CN223952747U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a breathing cap, concretely refers to a breathing cap with overpressure protection. BACKGROUND
[0002] The reciprocating compressor or gear box and other equipment will generate heat when working, the generated heat is conducted into the lubricating oil to cause the lubricating oil temperature to rise, the lubricating oil temperature rises to cause oil gas, and the oil gas is discharged through the breathing cap arranged on the exhaust hole of the reciprocating machine or gear box and other equipment, but the existing breathing cap has some problems, if the flow of oil mist into the filter core is too large in the use process, the space pressure in the filter core is too large, once the pressure is too large, the filtering effect of the filter core is affected, and the low filtering discharge efficiency causes the pressure in the equipment and the filter core to be too large, which affects the stability and safety of the whole equipment and the breathing cap during use. UTILITY MODEL CONTENTS
[0003] The utility model discloses a breathing cap with overpressure protection.
[0004] In order to achieve the above purpose, the utility model provides a breathing cap with overpressure protection, including the cylinder, the top cap, install in the filter core between the cylinder and the top cap of the cylinder, its characterized in that still include the protection valve of one end in the filter core of installing on the top cap, the protection valve includes the main part of installing on the top cap, the valve rod of sliding installation on the main part, the valve plate of installing on one end of the valve rod, the spring seat of installing on the other end of the valve rod and the spring of installing between the spring seat and the main part.
[0005] Further preferably, it further includes a hole plate net installed on one end of the main body and a protective cover installed on the other end of the main body, and the protective cover is provided with a plurality of through holes.
[0006] Further preferably, it further includes a stop ring arranged on the main body to limit the position of the valve plate and form a seal after being attached to the valve plate.
[0007] Further preferably, it further includes a check nut installed on the valve rod to prevent the spring seat from loosening.
[0008] Further preferably, the cylinder includes a support cylinder and a support table arranged on the upper part of the support cylinder for installing the filter core, an oil return cavity is formed between the support table and the filter core, and an oil return pipe is connected between the oil return cavity and the support cylinder.
[0009] Further preferably, the top cap opening is arranged downward, and an exhaust cavity is formed between the top cap opening and the cylinder for downward exhaust.
[0010] The utility model discloses a beneficial effect: through the additional protection valve in the top of respiratory cap, when the flow of oil mist into the filter core is too big and causes the pressure in the filter core to be too big, then through pressure promotes protection valve to open and releases pressure, is used for stabilizing the pressure of filter core internal space, thereby the security, stability of respiratory cap has been greatly improved. BRIEF DESCRIPTION OF DRAWINGS
[0011] Fig. 1 It is the structure schematic diagram of the utility model;
[0012] Fig. 2 It is the sectional structure schematic diagram of the utility model;
[0013] Fig. 3 It is the protection valve sectional structure schematic diagram of the utility model.
[0014] Legend: 1, cylinder;2, top cover;3, filter core;4, protection valve;41, main body;42, valve rod;43, valve plate;44, spring seat;45, spring;5, orifice plate net;6, protection cover;61, through -hole;7, baffle ring;8, support cylinder;81, support platform;82, oil return cavity;83, oil return pipe;9, exhaust cavity;10, lock nut. DETAILED DESCRIPTION
[0015] Below we combine the drawing and make further's explanation to the respiratory cap with overpressure protection of the utility model.
[0016] It needs to be explained that, all directionality indications such as upper, lower, left, right, front, back in the embodiment of the utility model are only used to explain the relative position relationship, movement condition etc. between various components in a certain specific posture, such as shown in the drawing, if the specific posture changes, then the directionality indication also changes accordingly.
[0017] In the utility model, unless another explicit provision and limitation, the terms "connect", "fix" etc. should be understood broadly;For example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, unless another explicit limitation. For the ordinary skilled person in the art, can understand the concrete meaning of the above terms in the utility model according to specific circumstances.
[0018] Reference Figs. 1-3The utility model discloses a respirator with overpressure protection, which comprises a cylinder 1, a top cover 2, a filter element 3 installed on the cylinder 1 and between the cylinder 1 and the top cover 2, characterized in that it further comprises a protection valve 4 installed on the top cover 2 and having one end inside the filter element 3, wherein the protection valve 4 comprises a main body 41 installed on the top cover 2, a valve rod 42 slidably installed on the main body 41, a valve plate 43 installed on one end of the valve rod 42, a spring seat 44 installed on the other end of the valve rod 42, and a spring 45 installed between the spring seat 44 and the main body 41.
[0019] When the flow of oil mist entering the filter element 3 is too large to cause excessive pressure in the filter element 3, the protection valve 4 is opened by the pressure to release the pressure, thereby stabilizing the pressure in the internal space of the filter element 3, and the safety and stability of the respirator are greatly improved.
[0020] The utility model further comprises a hole plate net 5 installed on one end of the main body 41 and a protection cover 6 installed on the other end of the main body 41, wherein the protection cover 6 is provided with a plurality of through holes 61; the hole plate net 5 is arranged to connect the internal cavity of the main body 41 with the internal space of the filter element 3, and the protection cover 6 and the plurality of through holes 61 of the protection cover 6 are arranged to release the pressure after the protection valve 4 is opened.
[0021] In one embodiment, the utility model further comprises a stop ring 7 arranged on the main body 41 to limit the position of the valve plate 43 and form a seal after the valve plate 43 is attached to the stop ring 7; the stop ring 7 is arranged to limit the position of the valve plate 43, and the protection valve 4 is closed when the valve plate 43 is attached to the stop ring 7 and is opened when the valve plate 43 is detached from the stop ring 7.
[0022] In one embodiment, the utility model further comprises a lock nut 10 installed on the valve rod 42 to prevent the spring seat 44 from loosening; the lock nut 10 is arranged to limit the installation of the spring seat 44 on the valve rod 42 and limit the position of the spring seat 44 on the valve rod 42; the spring seat 44 can be threadedly installed on the valve rod 42 or slidably installed on the valve rod 42.
[0023] In one embodiment, the cylinder 1 comprises a support cylinder 8 and a support table 81 arranged on the upper part of the support cylinder 8 to install the filter element 3; an oil return cavity 82 is formed between the support table 81 and the filter element 3, and an oil return pipe 83 is connected between the oil return cavity 82 and the support cylinder 8; the oil return cavity 82 and the oil return pipe 83 are arranged to return the filtered lubricating oil to the support cylinder 8 through the oil return pipe 83 when the filtered and separated lubricating oil falls into the oil return cavity 82, so that the filtered lubricating oil can be reused.
[0024] In one embodiment, the top cover 2 is arranged with an opening facing downward, and an exhaust cavity 9 is formed between the top cover 2 and the cylinder 1 to exhaust downward; the exhaust cavity 9 is arranged to exhaust the oil gas after the oil gas is filtered by the filter element 3.
[0025] The utility model discloses when using: when oil gas enters the filter core 3 after passing through the support cylinder 8, filter the oil gas through the filter core 3, and the oil in the oil gas is filtered, and the gas is discharged through the exhaust cavity 9, and the oil separated under the filter core 3 flows to the oil return cavity 82, and then returns to the support cylinder 8 through the oil return pipe 83, and then is reused;
[0026] When the oil gas or oil mist flow entering the filter core 3 is too large to cause the space pressure in the filter core 3 to exceed the pressure of the protection valve 4, the valve plate 43 is driven to act upward by pressure, and when the valve plate 43 acts upward, the valve rod 42 and the spring seat 44 are driven to act upward and press the spring 45, and when the valve plate 43 is separated from the blocking ring 7, the protection valve 4 is opened, the pressure in the filter core 3 is released through the protection valve 4, and until the pressure in the filter core 3 is lower than the pressure of the protection valve 4, the valve plate 43 is reset by the reset force of the spring 45 and is attached to the blocking ring 7, and the protection valve 4 is closed.
[0027] The protection scope of the utility model is not limited to the above embodiment and its transformation. The routine modification and replacement of the person skilled in the art based on the content of the embodiment all belong to the protection scope of the utility model.
Claims
1. A respirator with overpressure protection, comprising a cylinder (1), a top cover (2), a filter element (3) mounted on the cylinder (1) and between the cylinder (1) and the top cover (2); characterized in that The protection valve (4) is installed on the top cover (2) and one end is inside the filter core (3), the protection valve (4) comprises a main body (41) installed on the top cover (2), a valve rod (42) slidingly installed on the main body (41), a valve plate (43) installed on one end of the valve rod (42), a spring seat (44) installed on the other end of the valve rod (42) and a spring (45) installed between the spring seat (44) and the main body (41).
2. A respiratory hood with overpressure protection according to claim 1, characterized in that: A hole plate screen (5) is installed on one end of the main body (41) and a protection cover (6) is installed on the other end of the main body (41), the protection cover (6) is provided with a plurality of through holes (61).
3. A respiratory hood with overpressure protection according to claim 2, characterized in that: A stop ring (7) is arranged on the main body (41) to limit the position of the valve plate (43) and form a seal after being attached to the valve plate (43).
4. A respiratory cap with overpressure protection according to claim 1, characterized in that: A check nut (10) is installed on the valve rod (42) to prevent the spring seat (44) from loosening.
5. A respiratory cap with overpressure protection according to claim 1, characterized in that: The cylinder (1) comprises a support cylinder (8) and a support table (81) at the upper part of the support cylinder (8) for installing the filter core (3), an oil return cavity (82) is formed between the support table (81) and the filter core (3), and an oil return pipe (83) is connected between the oil return cavity (82) and the support cylinder (8).
6. A respiratory cap with overpressure protection according to claim 1, characterized in that: The top cover (2) is provided with an opening facing downward, and an exhaust cavity (9) for downward exhaust is formed between the top cover (2) and the cylinder (1).