TWM543947U - Electric-controlled proportional valve - Google Patents

Description

Electronically controlled proportional valve

This creation department is about an electronically controlled proportional valve, which mainly uses the pressure balance hole inside the valve core to reduce the cross-sectional area between the sliding shaft and the bottom valve, and reduce the force required for opening and closing, so that the solenoid valve can be adjusted. The scope has been expanded.

For the conventional electronically controlled proportional valve, as shown in Fig. 12, the valve seat body (90) is provided with a passage (91) for the gas (97) to be input and discharged, and the passage (91) is provided with a valve core ( 92) Corresponding to the valve (93), the solenoid valve (94) is cooperatively coupled to control the flow adjustment of the gas (97).

Wherein, it can be seen that the valve core (92) and the valve (93) are both provided with a pressure balance hole (95), so that the air pressure in the valve seat body (90) is maintained balanced, and the pressure balance hole (95) is patterned. It can be seen that it is placed at the valve core (92) and the valve (93). Usually, this arrangement will increase the unit cross-sectional area of the valve (93), and indirectly cause the electromagnetic valve (94) to drive the valve (93) to actuate the energy. The increase, causing the solenoid valve (94) to maintain a large output of energy, will make the valve seat body (90) pressure can not be more fine, and easily lead to unstable output.

In summary, the inconvenience and problems still need to be improved. Therefore, the creator feels that the above problems and the experience of research and development for many years, and the inconvenience and problems that can be improved, are painstaking research and cooperation with the actual situation. Applying, and in the spirit of excellence, finally proposed a creative design that effectively improves the above problems.

This creation is an electronically controlled proportional valve whose main technical purpose is to provide a pressure balance hole through the inside of the sliding shaft and the bottom valve, so that the unit cross-sectional area of both is reduced, so that the bottom valve can be lowered when the pneumatic fluid flows there. The force of opening and closing with the sliding shaft can expand the adjustment range of the solenoid valve.

The electronically controlled proportional valve of the present invention is composed of a valve seat, a guiding seat and a solenoid valve, wherein the valve seat has a first-class diameter inside, and the flow path is connected with an inlet and an outlet, and can be used for the circulation of the pneumatic fluid. a middle portion is disposed between the inlet and the outlet, and a valve base connected to the middle portion is further disposed below the valve seat, and the middle portion is further composed of a top valve, a bottom valve and a sliding shaft. a valve core is disposed between the bottom valve and the valve base through the elastic member, so that the valve core is operatively opened and closed corresponding to the solenoid valve, and a final portion is disposed in a non-horizontal direction before the outlet, so that The geometry of the three-dimensional structure within the flow path is designed to direct the stability of the pressurized fluid at the outlet.

Therefore, the electronically controlled proportional valve of the present invention can adjust the pressure of the pneumatic fluid when the pneumatic fluid is adjusted by the linkage between the foregoing structures, and can maintain the pressure at the discharge through the flow path. stability.

The present invention is an electronically controlled proportional valve (10), as shown in Figures 1 and 2 of the drawings, which is disposed at the bottom by a valve seat (20), and a guiding seat (50) and a connecting body are sequentially connected thereto. a solenoid valve (60), the valve seat (20) is internally provided with a first diameter (21) having an inlet (22) and an outlet (23) for circulation with a pneumatic fluid (P), and the flow path (21) is at the inlet ( 22) a middle portion (24) is provided between the outlet (23), and a final portion (27) is disposed in a non-horizontal direction before the outlet (23), so that the flow path (21) has a three-dimensional structure. The geometric shape is designed; and the valve seat (20) is further provided with a valve base (40) connected to the middle portion (24), and the middle portion (24) is further provided with a valve core (30). The spool (30) is composed of a top valve (31) and a bottom valve (33). The top valve (31) is disposed on the upper portion (25) of the middle portion (24) and is fitted with a sliding shaft (32). The bottom valve (33) is disposed at the lower portion (26) of the middle portion (24) and abuts against the bottom of the sliding shaft (32), and the bottom valve (33) is further provided with a ring shape at the lower periphery. The portion (35) is provided for an O-ring (36), and is disposed between the bottom valve (33) and the valve base (40) through an elastic member (37) to make the bottom The valve (33) can open and close the solenoid valve (60).

Please refer to the figure 3~4. This creation mainly installs a pressure balance hole (34) inside the sliding shaft (32) and the bottom valve (33) in the spool (30) to make the area (A). Can be reduced, and then the unit cross-sectional area of the sliding shaft (32) and the bottom valve (33) (this part can refer to the conventional structure of Figure 12 to compare the magnitude of the reduction, and there are still relevant data to explain later, so As will not be described in detail here, the formula defines F = PA to know that the cross-sectional area is reduced. Under the same pressure, the force (F) applied to the sliding shaft (32) by the bottom valve (33) can be reduced in the present construction. Therefore, when the pneumatic fluid (P) flows through the middle portion (24), the force (F) when the bottom valve (33) and the sliding shaft (32) are opened and closed can be lowered, so that the adjustment range of the solenoid valve (60) can be adjusted. More expansion.

Referring again to FIG. 5, in the preferred embodiment of the present invention, the spring (38) is disposed in the bottom valve (33), and the O-ring (36) is disposed in the annular portion (35). The electronically controlled proportional valve (10) can be more quickly and finely adjusted when the pneumatic fluid (P) passes to achieve the expansion of the above adjustment range;

Please also refer to FIG. 6 , wherein in another embodiment, the rubber ( 39 ) is disposed on the bottom valve (33), and the O-ring (36) provided in the annular portion (35) is moved. In addition, this adjustment is to reduce the adjustment range by replacing the components when the electronically controlled proportional valve (10) is operated for a long time to stabilize the pressure demand, and the use of the O-ring (36) can be removed. And reduce production costs.

Please refer to the figure 7~11. According to the order of the figure, it can be divided into four types: type A (7 picture), type B (8 picture), type C (9 picture), and type D (10 picture). The type D is the authoring structure, and the numbers in the framed lines are described by the area (number) in the following content; in addition, the measurement experiment of the present invention is mainly composed of a high-pressure air supply system and precise voltage regulation. Valve, data interception card, DC power supply, PLC control system, personal PC system and other components are constructed, and several pressure sensing are set inside each test proportional valve body (type A, type B, type C, type D) The device (S'mate 33A 150G 2210) performs numerical measurement of each flow path on the wall surface. The measurement accuracy of the pressure sensor component ranges between ±1.8%, and the pressure sensor reference value calibration curve is via 0.5. -5.5 (Bar) gas source pressure and voltage values were taken, the test pressure interval was 0.5 (Bar), and the numerical intercept frequency was 1000 (times/second).

By observing Figures 7, 8, and 9, it can be seen that the valve outlets inside type A are not the same as type B and type C, and there are distinct differences in the distribution of flow field properties; The inner valve outlet flow field (area 1) of A is located on the same axis as the flow path outlet, causing the vortex structure to be distributed closer to the flow path outlet, and the flow path outlet is unstable due to the pressure distribution (area 4). ;

The type B, and the type C internal valve outlet flow field (area 2, area 3) are all provided with an additional buffer space area design, and the area 2, the area 3 is on a different axis, this design makes the flow place The generated vortex structure is concentrated close to the top of the flow field and the outer edge of the buffer space, thereby reducing the instability of the flow path outlet due to the pressure distribution (region 5, region 6);

The creation type D is observed through the 10th figure, and the main analysis direction is still for the outlet flow field distribution of the internal valve core (30) of the electronically controlled proportional valve (10) (area 7, because the flow field is annular, so the analysis extends The difference between the average pressure value of the middle section (24) and the end section (27) of the flow path and the flow path (21) at the outlet (23) and the theoretical pressure value (region 8) is dominant;

Therefore, it can be seen from the above-mentioned 7th to 10th diagrams that if the buffer space area and the flow path outlet of the valve outlet of the proportional valve body are disposed on the different axes, the vortex distribution generated at the outlet of the valve port can quickly make the air flow. A pressure drop is generated and the pressure at the outlet of the flow path is indirectly stabilized.

However, the phenomenon produced by the above-mentioned dissimilar axis structure design can be obtained through the flow path pressure curve calculated in Fig. 11 , and the internal flow path (21) of the present electronically controlled proportional valve is in the middle section (24) and The pressure curves of the end section (27) and the outlet (23) are similar to the pressure distribution of the type B, and the pressure values are not significantly different from the pressure distributions of the type A and the type C. It is in a state of being close to the target outlet pressure.

In summary, the electronically controlled proportional valve (10) is provided with a pressure balance hole (34) through a sliding shaft (32) and a bottom valve (33) in the spool (30), thereby reducing the two. The cross-sectional area of the unit reduces the force of opening and closing the sliding shaft (32) and the bottom valve (33), so that the adjustment range of the solenoid valve (60) can be expanded, and the pneumatic fluid (P) can be maintained. The stability of the flow in the flow path (21), and depending on the use requirements, the elastic element (37) can be quickly replaced by simply replacing it.

(10)‧‧‧Electric proportional valve
(20)‧‧‧ Seat
(21) ‧‧‧Flow path
(22)‧‧‧ Entrance
(23)‧‧‧Export
(24) ‧ ‧ mid-section
(25) ‧‧‧above
(26)‧‧‧ Below
(27) ‧‧‧End
(30)‧‧‧Spool
(31)‧‧‧Top valve
(32)‧‧‧Sliding shaft
(33) ‧‧‧Bottom valve
(34) ‧‧‧ Pressure Balance Hole
(35) ‧‧‧Rings
(36)‧‧‧O-ring
(37) ‧‧‧Flexible components
(38) ‧ ‧ spring
(39)‧‧‧ Rubber
(40)‧‧‧Valve base
(50)‧‧‧Guide
(60)‧‧‧ solenoid valve
(A) ‧ ‧ area
(F) ‧ ‧ force
(P) ‧ ‧ pneumatic fluid
(90)‧‧‧Seat body
(91) ‧‧‧ channels
(92)‧‧‧Spool
(93)‧‧‧ Valves
(94)‧‧‧ solenoid valve
(95) ‧‧‧ Pressure Balance Hole
(96) ‧‧‧pressure channel
(97) ‧ ‧ gas

[Fig. 1] is a perspective view of a preferred embodiment of the present invention. [Fig. 2] is a schematic cross-sectional view showing a preferred embodiment of the present invention. [Fig. 3] is a schematic flow diagram of the pneumatic fluid of the preferred embodiment of the present invention. [Fig. 4] is a partially enlarged schematic view of the valve body of Fig. 3 of the preferred embodiment of the present invention. [Fig. 5] is a structural schematic view of a spring element and an O-ring arrangement of the elastic member of another embodiment of the present invention. [Fig. 6] is a schematic view showing the structure of the elastic member of the preferred embodiment of the present invention in a rubber configuration. [Fig. 7] is a schematic diagram of the gas pressure of the electronically controlled proportional valve of Test Type A of the preferred embodiment of the present invention. [Fig. 8] is a schematic diagram of the gas pressure of the electronically controlled proportional valve of Test Type B of the preferred embodiment of the present invention. [Fig. 9] is a schematic diagram of the gas pressure of the electronically controlled proportional valve of Test Type C of the preferred embodiment. [Fig. 10] is a schematic diagram of the air pressure of the electronically controlled proportional valve of Test Type D (this creation) of the preferred embodiment of the present invention. [Fig. 11] is a flow path pressure graph of the types A, B, C, and D of the preferred embodiment of the present invention. [Fig. 12] is a reference schematic diagram of a conventional structure.

(10)‧‧‧Electric proportional valve

(20)‧‧‧ Seat

(21) ‧‧‧Flow path

(22)‧‧‧ Entrance

(23)‧‧‧Export

(24) ‧ ‧ mid-section

(25) ‧‧‧above

(26)‧‧‧ Below

(27) ‧‧‧End

(30)‧‧‧Spool

(31)‧‧‧Top valve

(32)‧‧‧Sliding shaft

(33) ‧‧‧Bottom valve

(34) ‧‧‧ Pressure Balance Hole

(35) ‧‧‧Rings

(36)‧‧‧O-ring

(37) ‧‧‧Flexible components

(38) ‧ ‧ spring

(40)‧‧‧Valve base

(50)‧‧‧Guide

(60)‧‧‧ solenoid valve

Claims (4)

The utility model relates to an electronically controlled proportional valve, which comprises: a valve seat, which is sequentially connected with a guiding seat and a solenoid valve, wherein the valve seat has a first-class diameter inside, and the flow path has an inlet and an outlet for connecting a pneumatic fluid is circulated, and a middle portion is disposed between the inlet and the outlet, and a final portion is disposed in front of the outlet; a valve base is disposed under the valve seat and communicates with the middle portion; and The valve core comprises: a top valve disposed on the upper portion of the middle portion and coupled with a sliding shaft; a bottom valve disposed under the middle portion and abutting against the bottom of the sliding shaft, the bottom valve The lower periphery is further provided with an annular portion for an O-ring; an elastic member is disposed between the bottom valve and the valve base, so that the bottom valve is operatively corresponding to the electromagnetic valve for opening and closing; The sliding shaft and the bottom valve are disposed therein by using a pressure balance hole, thereby reducing a unit cross-sectional area between the sliding shaft and the bottom valve, so that the pneumatic fluid flows in the middle portion, and the bottom valve is lowered. The force of the sliding shaft opening and closing, thereby expanding the adjustment range of the solenoid valve. The electronically controlled proportional valve according to claim 1, wherein the elastic member is one of a spring or a rubber. The electronically controlled proportional valve according to claim 1, wherein when the elastic member is rubber, the O-ring is required to cooperate to remove the annular portion, so that the valve seat can be adjusted without being regulated for a long time. The electronically controlled proportional valve of claim 1, wherein the end section and the outlet are non-horizontal, such that the pressurized fluid is maintained stable from the inlet to the outlet through the flow path.