Structure of linear air escape valve

Abstract

The utility model is applicable to the technical field of gas valves, and discloses a structure of a linear gas release valve, which comprises a shell, a front-end shell is sleeved in an inner cavity of the shell, a panel is fixedly connected to the surface of the front-end shell, a concentric-square-shaped gas passage is arranged on the surface of the panel, an exhaust pipe is arranged at the tail end of one side of the gas passage, and the exhaust pipe is fixedly connected with the front-end shell. A semicircular limiting block matched with an inner cavity of the shell is fixedly connected to the position, connected with the front-end shell, of the bottom of the panel, and the position, connected with the front-end shell, of the bottom of the panel is fixedly connected with a semicircular limiting block matched with the inner cavity of the shell. For flowing of which the driving force comes from pressure, the core reason for flowing is that pressure difference exists at the two flowing ends, the airflow speed is reduced, the larger the pressure is, the slower the speed is, and the air leakage rate can be kept consistent under different sources of pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of gas valves, in particular to the structure of a linear air release valve. Background Art

[0002] With the advancement of science and technology and people's emphasis on health, various types of sphygmomanometers have appeared on the market. The main structure of existing electronic sphygmomanometers is a main body connected to an air bag to measure blood pressure. Generally, the main body of the sphygmomanometer is composed of a pressure sensor, an air pump, a solenoid valve, and a uniform air release valve. Each device is interconnected by a multi-channel gas collection cavity to conduct its related channels so that the gas can flow. However, the uniform air release valves in the prior art all achieve air release by simply opening micropores. When the pressure of the source air bag is low, the required air release rate can be achieved. When the pressure of the source air bag is high, the pressure release rate will be very fast, resulting in large signal capture errors, inaccurate measurements and misjudgments. In addition, the complex structure requires considerable cost and is prone to failure.

[0003] As an essential component of electronic sphygmomanometers, the uniform air release valve is widely used in various electronic sphygmomanometers. Traditional uniform air release valves generally adopt the following three methods:

[0004] 1. A threaded puncture plug, a silicone part and a plastic part are used to position and adjust the leakage rate by rotating the puncture plug through the thread;

[0005] 2. It is composed of a plastic part, a silicone part and a piercing needle, and the piercing needle is used to position, adjust and control the leakage rate;

[0006] 3. A silicone or rubber part plus glass, and the leakage rate is controlled by glass micro-pore processing technology.

[0007] However, all three methods have their shortcomings. First, the first and second types of air relief valves must undergo additional adjustments, and their performance will change due to factors such as storage and use environment. Secondly, these methods cannot maintain consistency and stability. The third type of air relief valve will change its performance during use due to external use environments such as dust and dander, and it itself is a fixed micropore to achieve uniform air release, which cannot solve the problem of excessive air release rate under high pressure.

[0008] Therefore, it is necessary to design a new type of uniform deflation valve, which can ensure stability in production and use, and keep the deflation rate consistent whether the air bag is in the high pressure area or the low pressure area during blood pressure measurement. Utility Model Content

[0009] The utility model aims to provide a linear air release valve structure, which aims to solve the technical problem that the existing air release valve cannot solve the problem of excessively fast air release rate in a high-pressure state.

[0010] In order to achieve the above object, the solution provided by the utility model is:

[0011] A linear air release valve structure comprises a shell, the inner cavity of the shell is sleeved with a front end shell, the surface of the front end shell is fixedly connected with a panel, and the surface of the panel is provided with a meandering airway.

[0012] Optionally, the meandering air duct includes an air duct opened on the surface of the panel, arc air ducts located on the surface of the panel are opened on both sides of the surface of the air duct, and an exhaust pipe is opened at the end of one side of the air duct.

[0013] Optionally, a semicircular limiting block adapted to the inner cavity of the shell is fixedly connected to the bottom of the panel and the connection with the front end shell.

[0014] Optionally, an air intake pipeline is provided at the center axis of the inner cavity of the front end shell.

[0015] Optionally, one end of the air intake line is connected to one end of the airway.

[0016] Optionally, the shell is a hollow cylindrical structure, and a protrusion is arranged on the top of the inner cavity of the shell.

[0017] Optionally, a limiting block is arranged in the air groove on the surface of the airway and the arc airway, and the top of the circular airway fits with the convex block.

[0018] Optionally, a portion of the outer side of the front end shell and the panel, the meandering air passage, the protrusion and the semicircular limiting block are all located in the inner cavity of the shell.

[0019] Optionally, the shell and the protrusion are made of rubber soft elastic material, and the front end shell, panel and semicircular limiting block are all made of acrylic plastic material.

[0020] Optionally, a clamping hole is provided at the bottom of the semicircular limiting block, and a rubber protrusion adapted to the clamping hole is provided on one side of the inner cavity of the shell.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The utility model provides a loop-shaped air release pipe structure, which allows slow air release even under high-pressure conditions. For most flows in pipes, the driving force of the flow comes from pressure, that is, the flow flows from the high-pressure area to the low-pressure area. For the flow whose driving force comes from pressure, the core reason for the flow is the pressure difference at the two ends of the flow. The ingenuity of this proposal lies in the use of a special loop design. The gas will be divided into two paths at each loop port and converge again at the second intersection. The flow directions of the two gases are opposite, so a great resistance is formed, the air flow speed is slowed down, the greater the pressure, the slower the speed, and the air release rate can be kept consistent under different source pressures. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the air release valve provided in the embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of the explosion structure of the air release valve in the embodiment of the utility model;

[0026] Figure 3 It is a side view of the air release valve provided by the embodiment of the utility model;

[0027] Figure 4 It is a top view of the front end housing structure and a schematic diagram of the circulation of the zigzag airway provided by an embodiment of the utility model;

[0028] Figure 5 is a cross-sectional view of the air release valve structure provided by an embodiment of the utility model;

[0029] Figure 6 It is a cross-sectional view of the explosion structure of the air relief valve provided in the embodiment of the utility model.

[0030] Description of Figure Numbers:

[0031] 1. Shell; 2. Front end shell; 3. Panel; 4. Round air duct; 4 1. Air duct; 4 2. Arc air duct; 4 3. Exhaust pipe; 5. Bump; 6. Semicircular limiting block; 7. Intake pipe. DETAILED DESCRIPTION

[0032] 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 of 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.

[0033] according to Figure 1 , Figure 2 and Figure 3 As shown, a structure of a linear air release valve includes a shell 1, an inner cavity of the shell 1 is sleeved with a front end shell 2, a panel 3 is fixedly connected to the surface of the front end shell 2, a circular airway 4 is arranged on the surface of the panel 3, the shell 1 and the circular airway 4 on the panel are combined to form a tiny special airway with an outer layer seal, the shell 1 is made of soft rubber material, sleeved on the outside of the front end shell 2, and wraps one side of the front end shell 2 and the semicircular limiting block 6 of the panel and the bottom inside, at this time, the convex block 5 of the same soft rubber material arranged in the inner cavity of the shell 1 will fit with the surface of the panel 3, and the convex block 5 is flatly attached to the surface of the panel 3 to seal the top of the return airway 4, so that the return airway 4 can form a completely sealed airway. At the same time, in order to prevent external dust from blocking the airway, a foreign matter buffer retention area is set at the closed end of the return airway 4 to prevent the influence of foreign matter such as dust accumulated for a long time on the air leakage hole. The return airway 4 and the right side of the shell 1 wrapped around the right side of the front shell 2 are provided with a semicircular blocking area to seal the front shell 2 so that the entire air leakage valve can only pass through the exhaust pipe 4 of the return airway 4. 3 is used to discharge gas, and at the same time, an air discharge channel is constructed with the air intake pipe 7. External gas flows in from the large hole direction, is decelerated through the tiny special air channel, and then is discharged through the small hole. The round-shaped air channel 4 includes an air channel 41 opened on the surface of the panel 3. Both sides of the surface of the air channel 41 are provided with arc air channels 42 located on the surface of the panel 3. The gas will be divided into two paths in each arc air channel 42 and converge again at the second intersection. The flow directions of the two gases are opposite, so a great resistance is formed, and the air flow speed is slowed down. The greater the pressure, the slower the speed. An exhaust pipe 43 is opened at the end of one side of the air channel 41. The number of arc air channels 42 is five, three on one side and two on the other side are opened on the surface of the panel 3 at intervals.

[0034] according to Figure 1 and Figure 2As shown, an air intake pipeline 7 is opened at the center axis of the inner cavity of the front end shell 2, and one end of the air intake pipeline 7 is connected to one end of the airway 41. The air intake pipeline 7 is located at the center axis of the front end shell 2, and the connection between it and the arc airway 42 is a spatial design. The two are not directly connected. The inner diameter of the air intake pipeline 7 is larger than the arc airway 42. The air intake pipeline 7 is used to connect to the air valve assembly of an external sphygmomanometer.

[0035] according to Figure 5 and Figure 6 As shown, a semicircular limiting block 6 adapted to the inner cavity of the shell 1 is fixedly connected to the bottom of the panel 3 and the connection with the front end shell 2. The shell 1 is a hollow cylindrical structure, and a protrusion 5 is arranged on the top of the inner cavity of the shell 1. The front end shell 2, the panel 3 and the semicircular limiting block 6 are an integral structure, and the uses of their various structures are inconsistent. One side of the outer surface of the front end shell 2 is used for docking with the sphygmomanometer, the panel 3 is used to fit the protrusion 5 to form a seal, and the semicircular limiting block 6 is fit with the inner cavity of the shell 1 to prevent the panel 3 and the protrusion 5 from not fitting tightly enough to cause air leakage.

[0036] according to Figure 2 and Figure 4 As shown, limit blocks are set in the air grooves on the surfaces of the air duct 41 and the arc air duct 42. The limit blocks are set on the top of the panel 3, between the loops of the air duct 41 and the arc air duct 42, and the top is in contact with the convex block 5, which is used to divert the gas pressure and block the gas to achieve a better pressure relief effect. The top of the circular air duct 4 is in contact with the convex block 5.

[0037] according to Figure 5 and Figure 6 As shown, a part of the outer side of the front end shell 2 and the panel 3, the circular airway 4, the protrusion 5 and the semicircular limiting block 6 are all located in the inner cavity of the shell 1. The shell 1 and the protrusion 5 are made of rubber soft elastic material, and the front end shell 2, the panel 3 and the semicircular limiting block 6 are all made of acrylic plastic material. A card hole is provided at the bottom of the semicircular limiting block 6, and a rubber protrusion adapted to the card hole is provided on one side of the inner cavity of the shell 1. Two card holes are reserved on both sides of the bottom of the semicircular limiting block 6. The purpose is to engage with the rubber protrusion in the inner cavity of the shell 1 when connected to the shell 1, so as to limit the surface of the shell 1 set on the front end shell 2, so as to prevent it from sliding in the subsequent long-term use, resulting in the displacement of the set.

[0038] The working principle of the utility model is:

[0039] First, install it, rotate the front end housing 2 to align it with the circular airway 4 on its surface and the clamping hole and rubber convex block at the bottom, insert the entire front end housing 2 into the housing 1, make the convex block 5 fit with the semicircular limiting block 6, make the rubber convex block fit with the clamping hole to form a fixed, and use an air pump to pump gas from the air intake pipe 7 to test whether the air release valve can be used normally and clean the floating dust remaining in the circular airway 4 at the same time;

[0040] When in use, first plug the front end shell 2 of the installed air release valve at the left end into the gas assembly of the sphygmomanometer, then adjust the position for use. When the sphygmomanometer pumps out gas, the gas enters the airway 41 from the open end of the air inlet pipe 7, impacts the end face of the arc airway 42 and enters the exhaust pipe 43 of the airway. The continuous impact on the side wall of the entire circular airway 4 is beneficial to the self-cleaning of the micropores. At the same time, the gas will be divided into two paths through the limit block at the return port of each arc airway 42, and converge again at the second intersection. The flow directions of the two gases are opposite, so a great resistance is formed, the air flow speed is slowed down, the greater the pressure, the slower the speed, and the deflation rate can be kept consistent under different source pressures to ensure normal deflation.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0042] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

[0043] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0044] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A linear air release valve structure, comprising a housing (1), characterized in that: The inner cavity of the shell (1) is provided with a front end shell (2), a panel (3) is fixedly connected to the surface of the front end shell (2), and a roundabout airway (4) is provided on the surface of the panel (3).

2. The structure of the linear air release valve according to claim 1, characterized in that: The circular air passage (4) comprises an air passage (41) opened on the surface of the panel (3), arc air passages (42) located on the surface of the panel (3) are opened on both sides of the surface of the air passage (41), and an exhaust pipe (43) is opened at the end of one side of the air passage (41).

3. The structure of the linear air release valve according to claim 2, characterized in that: A semicircular limiting block (6) adapted to the inner cavity of the shell (1) is fixedly connected to the bottom of the panel (3) and the connection with the front shell (2).

4. The structure of the linear air release valve according to claim 2, characterized in that: An air intake pipeline (7) is provided at the center axis of the inner cavity of the front end housing (2).

5. The structure of the linear air release valve according to claim 4, characterized in that: One end of the air intake pipeline (7) is in communication with one end of the air passage (41).

6. The structure of the linear air release valve according to claim 1, characterized in that: The shell (1) is a hollow cylindrical structure, and a protrusion (5) is provided on the top of the inner cavity of the shell (1).

7. The structure of the linear air release valve according to claim 1, characterized in that: Limiting blocks are arranged in the air grooves on the surfaces of the air channel (41) and the arc air channel (42), and the top of the circular air channel (4) fits in with the convex block (5).

8. The structure of the linear air release valve according to claim 6, characterized in that: A portion of the outer side of the front end shell (2), the panel (3), the roundabout air passage (4), the protrusion (5) and the semicircular limiting block (6) are all located in the inner cavity of the shell (1).

9. The structure of the linear air release valve according to claim 3, characterized in that: The housing (1) and the protrusion (5) are made of a rubber soft elastic material, and the front end housing (2), the panel (3) and the semicircular limiting block (6) are all made of acrylic plastic.

10. The linear air release valve structure according to claim 3, characterized in that: The bottom of the semicircular limiting block (6) is provided with a clamping hole, and one side of the inner cavity of the shell (1) is provided with a rubber protrusion adapted to the clamping hole.

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