CN214838667U

CN214838667U - Gas constant flow valve

Info

Publication number: CN214838667U
Application number: CN202120433523.0U
Authority: CN
Inventors: 王新
Original assignee: Guangzhou Ruipu Medical Technology Co ltd
Current assignee: Guangzhou Ruipu Medical Technology Co ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-11-23
Anticipated expiration: 2031-02-26

Abstract

The utility model relates to the technical field of regulating valves, and discloses a gas constant flow valve, which comprises an air inlet cavity, wherein one side is provided with an air inlet, and the other side is connected with a central cavity; one side of the central cavity is communicated with the air inlet cavity, and an air inlet is arranged in the central cavity; a first air outlet and one or more second air outlets are arranged between the other side of the air inlet and the air inlet, and each second air outlet is connected with a control valve for controlling the opening and closing of the second air outlet; the pressure detection device is connected with the central cavity to detect the air inlet pressure and the air outlet pressure of the central cavity; one end of the valve core is inserted into the air inlet hole through the other side of the central cavity, and the other end of the valve core is connected with the control device; and the control device is connected with the pressure detection device and the valve core so as to control the valve core to move in the air inlet according to the detected air inlet pressure and air outlet pressure, thereby adjusting the air inlet amount of the air inlet. The utility model discloses control flow that can be more meticulous realizes sectional type flow control, has improved the flow control precision.

Description

Gas constant flow valve

Technical Field

The utility model relates to a governing valve technical field especially relates to a gaseous constant current valve.

Background

At present, most of gas constant flow valves are self-operated control devices, and the gas constant flow valves are valves formed by combining self-operated differential pressure control devices and flow regulating devices, and can automatically regulate the size of a valve opening according to the size of an air inlet speed, so that self-adaptive gas flow regulation is realized. The self-operated gas constant flow valve comprises an adjusting plate, wherein one end of the adjusting plate is connected with a spring fixed on a valve seat, the other end of the adjusting plate extends into an airflow opening and bends downwards, and the adjusting plate automatically adjusts to enable the air inlet sectional area to be reduced or increased along with the increase or reduction of the wind speed at the airflow opening, so that the constancy of air inflow in unit time is ensured, and the effect of automatically adjusting the gas flow is achieved. However, the self-operated gas constant flow valve has the following problems: the spring in the self-operated gas constant flow valve needs a higher manufacturing process to ensure that the adjusting plate accurately falls on a specified position, so that the effect of constant flow adjustment is achieved; moreover, the elastic force of a spring in the self-operated gas constant flow valve is gradually reduced along with the increase of the service time, so that the flow regulation deviation is large; moreover, the self-operated gas constant flow valve is passively regulated, and the flow is fixed, so that active regulation and flow switching cannot be realized. At present, the electric control type gas constant flow valve can solve the problems existing in the self-operated type gas constant flow valve, and the electric control type gas constant flow valve realizes the effect of constant flow by controlling the opening size of the valve by using a stepping motor. However, the existing electric control type gas constant flow valve only has one gas outlet hole, can only carry out small flow regulation, and has insufficient regulation precision, thereby influencing the flow regulation effect.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention is to provide a gas constant flow valve to solve the problem that the current gas constant flow valve can only perform small flow adjustment and the adjustment precision is not enough.

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

gas constant flow valve, include:

the air inlet cavity is provided with an air inlet at one side, and the other side of the air inlet cavity is connected with the central cavity;

one side of the central cavity is communicated with the air inlet cavity, and an air inlet is formed in the central cavity; a first air outlet and one or more second air outlets are arranged between the other side of the central cavity and the air inlet, and each second air outlet is connected with a control valve for controlling the opening and closing of the second air outlet;

the pressure detection device is connected with the central cavity to detect the air inlet pressure and the air outlet pressure of the central cavity;

one end of the valve core is inserted into the air inlet hole through the other side of the central cavity, and the other end of the valve core is connected with a control device;

and the control device is connected with the pressure detection device and the valve core so as to control the valve core to move in the air inlet hole according to the detected air inlet pressure and air outlet pressure, thereby adjusting the air inlet amount of the air inlet hole.

Preferably, the first air outlet hole and the second air outlet hole are arranged in parallel.

Preferably, the control valve is a solenoid valve.

Preferably, the control device includes a main control board and a control mechanism, the main control board is installed on the outer wall of the central cavity, the main control board is electrically connected with the pressure detection device and the control mechanism, and the control mechanism is connected with the valve core to control the movement of the valve core.

Preferably, the control mechanism comprises a control motor, a gear, a slider and a support, the control motor is connected with the gear to drive the gear to rotate, the gear is mounted on the support, the slider is mounted on the gear and connected with the valve core, and the gear rotates to drive the slider to move horizontally to drive the valve core to move horizontally.

Preferably, the control mechanism further comprises a limiting plate, the limiting plate is installed below the support, and the limiting plate is electrically connected with the main control plate to detect the rotation position of the gear.

Preferably, a sealing cover is arranged on one side of the central cavity connected with the valve core, the sealing cover covers the central cavity, and a cavity is formed between the sealing cover and the central cavity.

Preferably, the gas constant flow valve further comprises a sealing element, the sealing element is arranged in the cavity, one side of the sealing element is sleeved on the valve core, and the other side of the sealing element covers the outer wall surface of the central cavity.

Preferably, an end cover is arranged on the other side of the central cavity, and one end of the valve core penetrates through the end cover and is inserted into the air inlet hole.

Preferably, an elastic component is arranged between the end cover and the air inlet, and the elastic component is sleeved on the valve core.

The embodiment of the utility model provides a gaseous constant current valve compares with prior art, and its beneficial effect lies in:

the gas constant flow valve provided by the embodiment of the utility model is provided with a plurality of air outlets, which can control the flow more finely, realize the sectional flow control and improve the flow regulation precision; in addition, the flow can be actively regulated and randomly switched through the control device, and the use is convenient.

Drawings

Fig. 1 is a schematic three-dimensional structure diagram of a gas constant flow valve according to an embodiment of the present invention;

fig. 2 is a schematic front view of a gas constant flow valve according to an embodiment of the present invention;

fig. 3 is a schematic top view of a gas constant flow valve according to an embodiment of the present invention;

fig. 4 is a schematic side view of a gas constant flow valve according to an embodiment of the present invention;

fig. 5 is a schematic sectional view a-a of a gas constant flow valve according to an embodiment of the present invention;

fig. 6 is an exploded view of a gas constant flow valve according to an embodiment of the present invention;

in the figure, 1, an air inlet cavity; 11. an air inlet; 12. an air inlet joint; 13. a water condensing cylinder; 14. a third seal ring;

2. a central cavity; 21. an air inlet; 22. a first air outlet hole; 221. an exhaust nozzle; 23. a second air outlet; 24. a control valve; 25. a through hole; 26. a second seal ring; 27. an air inlet pressure taking port; 28. an air outlet pressure taking port; 29. a sealing plug;

3. a valve core; 31. a valve core rod; 32. a valve core head; 33. a convex edge; 34. a first seal ring;

41. a main control board; 42. controlling the motor; 43. a gear; 431. a cam; 432. a raised block; 44. a slider; 441. a chute; 442. mounting grooves; 45. a support; 46. a pin shaft;

5. a limiting plate;

6. a sealing cover; 61. a sliding bearing; 62. a seal member;

7. an end cap;

8. an elastic member.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1-6, the gas constant flow valve according to the preferred embodiment of the present invention includes an air inlet cavity 1, a central cavity 2, a pressure detecting device, a valve core 3 and a control device. An air inlet 11 is formed in one side of the air inlet cavity 1, the air inlet 11 can be connected with an air inlet pipeline through an air inlet joint 12, different air inlet pipelines can be compatible by replacing different air inlet joints 12, and a third sealing ring 14 is arranged between the air inlet joint 12 and the air inlet 11; the other side of the air inlet cavity 1 is connected with the central cavity 2, so that air enters the central cavity 2 through the air inlet pipeline and the air inlet cavity 1. One side of the central cavity 2 is communicated with the air inlet cavity 1, and an air inlet 21 is arranged in the central cavity 2, as shown in fig. 5, the air inlet 21 is arranged in the middle of the central cavity 2; a first air outlet 22 and one or more second air outlets 23 are arranged between the other side of the central cavity 2 and the air inlet 21, the first air outlet 22 is provided with an air outlet nozzle 221, and each second air outlet 23 is connected with a control valve 24 for controlling the opening and closing of the corresponding second air outlet 23. Preferably, the first outlet hole 22 and the second outlet hole 23 are arranged in parallel, and the plurality of second outlet holes 23 are arranged in parallel. Preferably, the control valve 24 is a solenoid valve, and the solenoid valve plays a role of controlling the opening and closing of the second air outlet 23, and when the solenoid valve is in a closed state, it can play a role of sealing the second air outlet 23. The total size of the air outlet holes of the central cavity 2 is the sum of the first air outlet hole 22 and the second air outlet hole 23, and the corresponding second air outlet hole 23 is controlled to be opened and closed through the electromagnetic valve so as to realize the air flow control of the corresponding air outlet passage, thereby realizing sectional flow control and realizing fine flow regulation. The pressure detection device is connected with the central cavity 2 to detect the air inlet pressure and the air outlet pressure of the central cavity 2, and the gas flow value is obtained according to the air inlet pressure value and the air outlet pressure value, so that the gas flow can be adjusted according to the detection result. One end of the valve core 3 is inserted into the air inlet 21 through the other side of the central cavity 2, so that the size of the air inlet 21 is adjusted by using the valve core 3; the other end of the valve core 3 is connected with a control device. The control device is connected with the pressure detection device and the valve core 3 to control the valve core 3 to move in the air inlet 21 according to the detected air inlet pressure and air outlet pressure so as to adjust the air inlet amount of the air inlet 21; specifically, when the detected inlet pressure value and outlet pressure value are changed, the position of the valve core 3 is adjusted to adjust the inlet air quantity and realize constant flow output.

The utility model is provided with a plurality of air outlets, and controls the opening and closing of the corresponding air outlets through the control valve 24, thereby more finely controlling the flow, realizing the sectional flow control and improving the flow regulation precision; in addition, the flow can be actively regulated and randomly switched through the control device, and the use is convenient. And, gaseous constant flow valve restarts at every turn and all can recalibrate once for when it is in operating condition for a long time, the condition of 3 squints of case can not appear. The utility model discloses in, every component part of gaseous constant current valve only needs conventional precision can satisfy the demand.

In this embodiment, the air inlet cavity 1 and the central cavity 2 may be made of cylinders having cavities. A through hole 25 is arranged at one side of the central cavity 2 connected with the air inlet cavity 1, the through hole 25 is communicated with an air inlet 21 of the central cavity 2, and the diameter of the through hole 25 is larger than that of the air inlet 21; the through hole 25 is further communicated with the air inlet cavity 1, and preferably, a second sealing ring 26 is arranged at the interface of the through hole 25 and the air inlet cavity 1 to prevent gas from leaking from the interface.

Alternatively, the pressure detection device may be an air pressure sensor disposed on a side wall of the central cavity 2, specifically, disposed between the air inlet 21 of the central cavity 2 and the air inlet cavity 1, so as to detect the inlet pressure and the outlet pressure by using the air pressure sensor. As shown in fig. 6, an inlet pressure tapping 27 and an outlet pressure tapping 28 are provided in the central cavity 2 for respectively tapping inlet pressure and outlet pressure, and further, the inlet pressure tapping 27 is also provided with a sealing plug 29.

Optionally, the control device includes a main control board 41 and a control mechanism, the main control board 41 is installed on the outer wall of the central cavity 2, the main control board 41 is electrically connected to the pressure detection device and the control mechanism, and the main control board 41 receives a detection result of the pressure detection device and controls the control mechanism to operate according to the detection result; the control mechanism is connected with the valve core 3, receives the control signal of the main control board 41, and controls the valve core 3 to move in the air inlet 21 according to the control signal so as to regulate the air flow. In this embodiment, the main control Board 41 is made of a Printed Circuit Board (PCB). Optionally, the gas constant flow valve further includes a connecting frame, the connecting frame is installed on the outer side wall surface of the central cavity 2, the main control board 41 is installed on the connecting frame, specifically, the connecting frame is connected with the outer side wall surface of the central cavity 2 by bolts, and the main control board 41 is embedded in the connecting frame.

Further, the control mechanism comprises a control motor 42, a gear 43, a slider 44 and a support 45, the control motor 42 is connected with the gear 43 to drive the gear 43 to rotate, and optionally, the control motor 42 can be a stepping motor; the gear 43 is mounted on the support 45, the slider 44 is mounted on the gear 43, the slider 44 is connected with the valve core 3, and the gear 43 rotates to drive the slider 44 to move horizontally so as to drive the valve core 3 to move horizontally. In this embodiment, the support 45 includes a vertical plate and a horizontal plate, wherein the gear 43 is installed on one side of the vertical plate through the pin 46, and the control motor 42 is installed on the other side of the vertical plate and connected with the gear 43, and drives the gear 43 to rotate through the motor shaft.

In this embodiment, a cam 431 is disposed on one side of the gear 43 contacting the slider 44, a protrusion is disposed at one end of the slider 44, the protrusion is clamped on an outer edge of the cam 431, a mounting groove 442 for mounting the valve element 3 is disposed at the other end of the slider 44, the mounting groove 442 is T-shaped, a sliding groove 441 is disposed in the middle of the slider 44, the sliding groove 441 is rectangular, and the pin 46 passes through the center of the gear 43 and is inserted into the sliding groove 441, so that the pin 46 does not interfere with the horizontal movement of the slider 44. When the gear 43 rotates, the cam 431 rotates along with the gear, and because the radius of the cam 431 gradually changes and the outer edge of the cam 431 is in contact with the lug of the slide block 44, the lug moves horizontally while the cam 431 rotates, so that the slide block 44 drives the valve core 3 to move horizontally. The control motor 42 is used for receiving a control signal of the main control panel 41, the gear 43 is driven to rotate according to the control signal, and the gear 43 rotates and simultaneously drives the valve core 3 to move in the air inlet 21 so as to change the size of the air inlet 21, thereby changing the amount of gas entering the central cavity 2 and achieving the flow regulation effect. As shown in fig. 5, when the valve core 3 moves to the left, the gap between the valve core 3 and the air inlet hole 21 is gradually increased, so that the air inlet hole 21 is enlarged, and the amount of air entering the central cavity 2 through the air inlet hole 21 is increased; conversely, when the valve core 3 moves rightwards, the gap between the valve core 3 and the air inlet hole 21 is gradually reduced, so that the air inlet hole 21 is reduced, and the amount of air entering the central cavity 2 through the air inlet hole 21 is reduced.

Further, preferably, the control mechanism further includes a limit plate 5, the limit plate 5 is installed below the support 45, and the limit plate 5 is electrically connected to the main control board 41 to detect the rotation position of the gear 43 and transmit the detection result to the main control board 41, so that the control motor 42 can control the gear 43 to rotate according to the control signal of the main control board 41 to limit the rotation range of the gear 43, thereby limiting the movement range of the valve element 3. In this embodiment, the limiting plate 5 is made of a PCB. In this embodiment, one side of the gear 43 is provided with the protruding block 432, the protruding block 432 rotates along with the gear 43, the limiting plate 5 is disposed below the support 45, the limiting plate 5 is provided with a sensor, the sensor is electrically connected with the main control board 41, the protruding block 432 which rotates to the position above the limiting plate is sensed by the sensor, so that the rotating position of the gear 43 is determined, and the rotating position of the gear 43 is transmitted to the main control board 41.

Optionally, a sealing cover 6 is disposed on one side of the central cavity 2 connected to the valve core 3, the sealing cover 6 covers the central cavity 2, a cavity is formed between the sealing cover 6 and the central cavity 2, and the valve core 3 penetrates through the sealing cover 6 and enters the central cavity 2. In this embodiment, the sealing cover 6 is connected to the outer wall surface of the central cavity 2 by a bolt, and the valve element 3 is connected to the sealing cover 6 by a sliding bearing 61. Further, the gas constant flow valve further comprises a sealing element 62, the sealing element 62 is arranged in the cavity, one side of the sealing element 62 is sleeved on the valve core 3, and the other side of the sealing element 62 covers the outer wall surface of the central cavity 2. In this embodiment, the sealing member 62 is bowl-shaped, includes a bowl opening and a bowl bottom, and is made of silica gel, specifically, the bowl opening covers the central cavity 2, and the diameter of the bowl opening is larger than that of the end cover 7; the valve core 3 penetrates through the bowl bottom and is fixed with the bowl bottom. When the valve core 3 moves, the bowl bottom is elastically deformed.

Optionally, an end cover 7 is disposed on a side of the central cavity 2 not connected to the air inlet cavity 1, and one end of the valve core 3 passes through the end cover 7 and is inserted into the air inlet 21. In this embodiment, the end cap 7 is connected to the outer wall surface of the central cavity 2 by bolts.

Furthermore, an elastic member 8 is arranged between the end cover 7 and the air inlet 21, and the elastic member 8 is sleeved on the valve core 3. Preferably, the elastic member 8 is a spring sleeved on the outer peripheral side of the valve core 3, and more preferably, the elastic member 8 is a tower-shaped spring, and the outer diameter of the tower-shaped spring is gradually reduced from the end cover 7 to the air inlet 21. Further, a groove is formed in the end cap 7, and one end of the spring is embedded in the groove.

As shown in fig. 5, the valve core 3 includes a valve core rod 31 and a valve core head 32, and the valve core head 32 is spherical and is inserted into the air inlet hole 21; one end of the valve core rod 31 is connected with the sliding block 44, the end is arranged in a T shape to be inserted into the T-shaped installation groove 442 of the sliding block 44, a convex edge 33 is arranged at the other end of the valve core rod 31 close to the valve core head 32, the outer diameter of the convex edge 33 is larger than the diameter of the air inlet hole 21, and a first sealing ring 34 is arranged between the convex edge 33 and the valve core head 32 to seal the air inlet hole 21.

Optionally, a water condensation cylinder 13 is further connected to the air inlet cavity 1 and used for collecting condensed liquid, and a central axis of the water condensation cylinder 13 is perpendicular to a central axis of the air inlet 11. Further, a third sealing ring 14 is arranged at the interface of the water condensation cylinder 13 and the air inlet cavity 1 to seal the interface.

To sum up, the embodiment of the present invention provides a gas constant flow valve, which is provided with multiple air outlets, so as to control flow more precisely, realize sectional flow control, and improve flow regulation precision; in addition, the flow can be actively regulated and randomly switched through the control device, and the use is convenient. And, gaseous constant flow valve restarts at every turn and all can recalibrate once for when it is in operating condition for a long time, the condition of 3 squints of case can not appear. The utility model discloses in, every component part of gaseous constant current valve only needs conventional precision can satisfy the demand.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A gas constant flow valve, comprising:

2. The gas constant flow valve according to claim 1, wherein the first gas outlet hole is arranged in parallel with the second gas outlet hole.

3. The gas constant flow valve according to claim 1, wherein the control valve is a solenoid valve.

4. The gas constant flow valve according to claim 1, wherein the control device comprises a main control board and a control mechanism, the main control board is mounted on an outer wall of the central cavity, the main control board is electrically connected with the pressure detection device and the control mechanism, and the control mechanism is connected with the valve core to control the valve core to move.

5. The gas constant flow valve according to claim 4, wherein the control mechanism comprises a control motor, a gear, a slider and a support, the control motor is connected with the gear to drive the gear to rotate, the gear is mounted on the support, the slider is mounted on the gear and is connected with the valve core, and the gear rotates to drive the slider to move horizontally to drive the valve core to move horizontally.

6. The gas constant flow valve according to claim 5, wherein the control mechanism further comprises a limiting plate installed below the support, the limiting plate being electrically connected to the main control plate to detect a rotational position of the gear.

7. The gas constant flow valve according to claim 1, wherein a sealing cover is arranged on one side of the central cavity connected with the valve core, the sealing cover covers the central cavity, and a cavity is formed between the sealing cover and the central cavity.

8. The gas constant flow valve according to claim 7, further comprising a sealing member disposed in the cavity, wherein one side of the sealing member is sleeved on the valve core, and the other side of the sealing member covers an outer wall surface of the central cavity.

9. The gas constant flow valve according to claim 1, wherein an end cap is provided at the other side of the central cavity, and one end of the valve core is inserted into the gas inlet hole through the end cap.

10. The gas constant flow valve according to claim 9, wherein an elastic member is disposed between the end cap and the gas inlet hole, and the elastic member is sleeved on the valve core.