CN217842839U - Constant flow valve capable of stabilizing gas flow - Google Patents
Constant flow valve capable of stabilizing gas flow Download PDFInfo
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- CN217842839U CN217842839U CN202221895537.5U CN202221895537U CN217842839U CN 217842839 U CN217842839 U CN 217842839U CN 202221895537 U CN202221895537 U CN 202221895537U CN 217842839 U CN217842839 U CN 217842839U
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Abstract
The utility model relates to a medical gas detects technical field, specifically discloses a but gas flow's constant flow valve is stabilized. The constant flow valve comprises a hollow valve body mounting seat with a through left end and a through right end, wherein the right end of the valve body mounting seat is connected with a gas cavity, a left inner cavity and a right inner cavity are arranged in the gas cavity, and the left inner cavity and the right inner cavity are communicated through an adjusting hole; the gas chamber is provided with a second gas nozzle and a gas inlet which are communicated with the right inner cavity, and a first gas nozzle and a gas outlet which are communicated with the left inner cavity; a through hole is formed in one side face of the gas cavity, a connecting piece capable of moving left and right is arranged in the through hole, and an adjusting head is arranged at one end of the connecting piece; the other end is connected with a driving component; the through hole is hermetically connected with an elastic sealing element. The constant flow valve can realize the adjustment in a small range of input flow to achieve the purpose of stabilizing the input flow, and simultaneously has a feedback constraint function, so that the input flow can only be adjusted in a set small range of output flow.
Description
Technical Field
The utility model relates to a medical gas detects technical field, especially relates to a but steady gas flow's constant flow valve.
Background
In the field of medical gas detection, when a sample gas is collected, the gas needs to be collected within a certain gas flow range, because the gas detection result collected within the set flow range is more accurate. Therefore, a constant flow valve is usually used for gas flow regulation. However, the conventional constant flow valve has poor adjusting effect, so that the accuracy of a detection result is influenced.
Disclosure of Invention
An object of the utility model is to provide a but gas flow's constant flow valve can realize adjusting in the less within range of input flow, reaches the purpose of stable input flow, still has feedback restraint function simultaneously, makes the input flow can only adjust in the output flow small scale of settlement.
To achieve the purpose, the utility model adopts the following technical proposal:
a constant flow valve capable of stabilizing gas flow comprises a hollow valve body mounting seat with a through left end and a through right end, wherein a gas cavity is connected to the right end of the valve body mounting seat, a left inner cavity and a right inner cavity are arranged in the gas cavity, and the left inner cavity and the right inner cavity are communicated through an adjusting hole;
the gas chamber is provided with a first gas nozzle, a second gas nozzle, a gas inlet and a gas outlet, the second gas nozzle and the gas inlet are communicated with the right inner cavity, and the first gas nozzle and the gas outlet are communicated with the left inner cavity;
a through hole is formed in one side face, facing the valve body mounting seat, of the gas cavity, a connecting piece capable of moving left and right is arranged in the through hole, one end of the connecting piece is located in the right inner cavity, and an adjusting head capable of extending into the adjusting hole f is arranged at the end of the connecting piece; the other end of the connecting piece is positioned in the valve body mounting seat and is connected with a driving assembly, and the driving assembly is mounted on the valve body mounting seat and can drive the connecting piece to move;
and an elastic sealing element is hermetically connected at the through hole.
Furthermore, the adjusting head is conical or frustum-shaped, and the inner diameter of the adjusting head decreases progressively from left to right.
Furthermore, the outer side of one end, close to the adjusting head, of the connecting piece is convexly provided with a limiting bulge, and the outer diameter of the limiting bulge is larger than the inner diameter of the adjusting hole f.
Further, the left inner cavity, the adjusting hole f, the right inner cavity and the air inlet are coaxially arranged.
Furthermore, the driving assembly comprises a telescopic shaft and a stepping motor for driving the telescopic shaft to stretch left and right; the connecting piece is coaxially connected with the telescopic shaft.
Furthermore, a baffle is connected to the telescopic shaft, a distance sensor is arranged on the left side or the right side of the baffle, and the distance sensor is installed on the valve body installation seat.
Furthermore, the elastic sealing element is a sealing ring arranged on the connecting piece, and the outer end of the sealing ring is arranged between the valve body mounting seat and the end face of the gas chamber.
And the gas chamber is also provided with a third gas nozzle communicated with the right inner cavity.
The utility model has the advantages that: the utility model discloses a can stabilize gas flow's constant flow valve when treating that the collection gas gets into right inner chamber through the air inlet, through the pressure difference between first air cock and the second air cock, makes step motor output signal of telecommunication, makes the regulation head follow the flexible and control the removal of realization of telescopic shaft to the sectional area size of regulation and control regulation hole, and then the gaseous flow of control, through feedback signal regulation input gas flow. The constant flow valve has rapid regulation response, can realize regulation in a small range of input flow to achieve the aim of stabilizing the input flow, and simultaneously has a feedback constraint function to ensure that the input flow can be regulated only in a set small range of output flow; compact structure, small in size, light in weight, easy to assemble and maintain.
Drawings
Fig. 1 is a schematic structural diagram of a constant flow valve capable of stabilizing gas flow provided by the present invention.
In the figure: 1-a step motor; 2-valve body mounting seat; 3-a detection plate; 4-a gas chamber; 41-left lumen; 42-right lumen; 5-a conical head; 51-an adjustment head; 52-limit bump; 6-sealing ring; 7-a baffle plate; 1 a-a motor shaft; 4 a-a first air tap; 4 b-a second air tap; 4 c-a third air tap; 4 d-air inlet; 4 e-gas outlet; 4 f-adjustment hole.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.
As shown in fig. 1, a constant flow valve capable of stabilizing gas flow includes a hollow valve body mounting seat 2 with two through ends, a gas chamber 4 is connected to the right end of the valve body mounting seat 2, a left inner cavity 41 and a right inner cavity 42 are arranged in the gas chamber 4, and the left inner cavity 41 and the right inner cavity 42 are communicated through an adjusting hole 43. The gas chamber 4 is provided with a first gas nozzle 4a, a second gas nozzle 4b, a gas inlet 4d and a gas outlet 4e, the second gas nozzle 4b and the gas inlet 4d are communicated with the right inner cavity 42, and the first gas nozzle 4a and the gas outlet 4e are communicated with the left inner cavity 41. A through hole is arranged on one side surface of the gas chamber 4 facing the valve body mounting seat 2, a connecting piece 5 capable of moving left and right is arranged in the through hole, one end of the connecting piece 5 is positioned in the right inner cavity 42, and the end part of the connecting piece is provided with an adjusting head 51 capable of extending into the adjusting hole 4 f; the other end is positioned in the valve body mounting seat 2 and is connected with a driving assembly which is arranged on the valve body mounting seat 2 and can drive the connecting piece 5 to move. The through hole is hermetically connected with an elastic sealing element 6.
In the constant flow valve, preferably, the adjusting hole 43 is a circular hole, the adjusting head 51 is conical or frustum-shaped, and the size of the inner diameter decreases from left to right. Furthermore, a limiting protrusion 52 is convexly arranged on the outer side of one end of the connecting piece 5 close to the adjusting head 51, and the outer diameter of the limiting protrusion 52 is larger than the inner diameter of the adjusting hole 4 f.
In the constant flow valve, preferably, the left inner cavity 41, the adjusting hole 4f, the right inner cavity 42, and the air inlet 4d are coaxially arranged. Wherein, the gas chamber 4 is further provided with a third gas nozzle 4c communicated with the right inner cavity 42, so as to cooperate with the second gas nozzle 4b and the first gas nozzle 4a to obtain the pressure difference between the left inner cavity 41 and the right inner cavity 42.
In the constant flow valve, a driving assembly comprises a telescopic shaft 1a and a stepping motor 1 for driving the telescopic shaft 1a to stretch left and right; the connecting member 5 is coaxially connected to the telescopic shaft 1 a. Further, be connected with baffle 7 on the telescopic shaft 1a, the left side or the right side of baffle 7 are provided with distance sensor, and this distance sensor installs on valve body mount pad 2 for accurate control telescopic shaft 1a, connecting piece 5 and regulation head 51's displacement.
In the constant flow valve, the elastic sealing element 6 is a sealing ring mounted on the connecting piece 5, and the outer end of the sealing ring is mounted between the valve body mounting seat 2 and the end face of the gas chamber 4. In the process that the connecting piece 5 moves left and right, the sealing ring always keeps the through hole in a sealing state, and gas in the left inner cavity 41 is prevented from escaping from the through hole.
The utility model discloses a but steady gas flow's constant flow valve when waiting to gather gas and getting into right inner chamber 42 through air inlet 4d in, through the pressure difference between first air cock 4a and the second air cock 4b, makes step motor 1 output signal of telecommunication, makes adjusting head 51 follow the flexible of telescopic shaft 1a and control the removal in the realization to regulate and control the sectional area size of regulation hole 4f, and then the gaseous flow of control, through feedback signal regulation input gas flow. The constant flow valve is rapid in regulation response, can realize regulation in a small range of input flow to achieve the purpose of stabilizing the input flow, and has a feedback constraint function to ensure that the input flow can be regulated only in a set small range of output flow. For example, an output flow of 5L/min is required, then the input flow value is constrained to be within (5 + -0.5) L/min, and an out-of-range input flow determination fails.
In addition, the constant flow valve has the advantages of compact structure, small volume, light weight and convenient installation and maintenance.
The technical principle of the present invention has been described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and is not to be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (8)
1. The constant flow valve capable of stabilizing the gas flow is characterized by comprising a hollow valve body mounting seat (2) with a left end and a right end communicated with each other, wherein the right end of the valve body mounting seat (2) is connected with a gas chamber (4), a left inner cavity (41) and a right inner cavity (42) are arranged in the gas chamber (4), and the left inner cavity (41) is communicated with the right inner cavity (42) through an adjusting hole (4 f);
the gas chamber (4) is provided with a first gas nozzle (4 a), a second gas nozzle (4 b), a gas inlet (4 d) and a gas outlet (4 e), the second gas nozzle (4 b) and the gas inlet (4 d) are communicated with the right inner cavity (42), and the first gas nozzle (4 a) and the gas outlet (4 e) are communicated with the left inner cavity (41);
a through hole is formed in one side face, facing the valve body mounting seat (2), of the gas cavity (4), a connecting piece (5) capable of moving left and right is arranged in the through hole, one end of the connecting piece (5) is located in the right inner cavity (42), and the end part of the connecting piece is provided with an adjusting head (51) capable of extending into the adjusting hole (4 f); the other end of the connecting rod is positioned in the valve body mounting seat (2) and is connected with a driving assembly, and the driving assembly is mounted on the valve body mounting seat (2) and can drive the connecting piece (5) to move;
and an elastic sealing element (6) is connected at the through hole in a sealing way.
2. The constant flow valve capable of stabilizing the flow of gas according to claim 1, wherein the adjusting head (51) is tapered or frustum-shaped, and the inner diameter decreases from left to right.
3. The constant flow valve capable of stabilizing the flow rate of gas according to claim 1 or 2, wherein a limiting protrusion (52) is protruded from the outer side of one end of the connecting member (5) close to the adjusting head (51), and the outer diameter of the limiting protrusion is larger than the inner diameter of the adjusting hole (4 f).
4. The constant flow valve for stabilizing the flow of gas according to claim 1, wherein the left inner chamber (41), the adjusting hole (4 f), the right inner chamber (42) and the gas inlet (4 d) are coaxially arranged.
5. The constant flow valve capable of stabilizing the gas flow rate according to claim 1, wherein the driving assembly comprises a telescopic shaft (1 a) and a stepping motor (1) for driving the telescopic shaft (1 a) to be telescopic left and right; the connecting piece (5) is coaxially connected with the telescopic shaft (1 a).
6. The constant flow valve capable of stabilizing the gas flow according to claim 5, wherein a baffle (7) is connected to the telescopic shaft (1 a), and a distance sensor is arranged on the left side or the right side of the baffle (7) and is mounted on the valve body mounting seat (2).
7. Constant flow valve for stabilising the gas flow according to claim 1, characterised in that the resilient sealing element (6) is a sealing ring mounted on the connecting piece (5), the outer end of the sealing ring being mounted between the valve body mounting seat (2) and the end surface of the gas chamber (4).
8. A constant flow valve for stabilizing gas flow according to claim 1, wherein a third air nozzle (4 c) is further provided on the gas chamber (4) and communicates with the right inner cavity (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221895537.5U CN217842839U (en) | 2022-07-22 | 2022-07-22 | Constant flow valve capable of stabilizing gas flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221895537.5U CN217842839U (en) | 2022-07-22 | 2022-07-22 | Constant flow valve capable of stabilizing gas flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217842839U true CN217842839U (en) | 2022-11-18 |
Family
ID=84039741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221895537.5U Active CN217842839U (en) | 2022-07-22 | 2022-07-22 | Constant flow valve capable of stabilizing gas flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217842839U (en) |
-
2022
- 2022-07-22 CN CN202221895537.5U patent/CN217842839U/en active Active
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