CN201535366U - Linear flow control valve - Google Patents

Abstract

The utility model discloses a linear flow control valve, which comprises a valve body and a valve core, wherein a spiral sealing surface is arranged on the valve core, and a ventilation port is arranged on the valve body; the sealing surface of the valve core is matched with the inner surface of the valve body, so that the overlapping area of the sealing surface and the ventilation port linearly changes relative to the rotating angle when the valve core and the valve body relatively rotate, and the valve body and the valve core have no axial displacement. The utility model has the advantages of high adjustment accuracy, convenient control and the like.

Description

A kind of linear flow adjustable valve

Technical field

The utility model relates to a kind of flow control valve, particularly a kind of linear flow adjustable valve.

Background technique

At present, valve fluid flow such as ball valve, gate valve, needle-valve are made adjusting usually.In the linearly adjust of flow, degree of regulation is often determined by the stroke of modulating valve and the linearity of flow, common modulating valve, and as ball valve, total stroke has 90 degree, and effectively regulation range has only 30 degree, degree of regulation is restricted; The degree of regulation of needle-valve is fine, but motion is axially being arranged, and is difficult to final controlling element control, and inconvenience is controlled automatically.

Chinese patent CN201028031Y discloses a kind of rotary linearly adjust valve, as shown in Figure 1, 2, work principle is: fluid is by the end face inlet passage 2-1 of spool 2, turning 90 degrees the back at the channel interior folding is flowed out through the outlet 1-1 of valve body 1 correspondence by the outlet of spool side, along with the angle of swing difference of spool in valve body 1, spool 2 will present linear change with the area of the valve body 1 common rectangle outlet that constitutes, thereby realizes the purpose of linearly adjust.

Above-mentioned rotary linearly adjust valve has been realized the linearly adjust of flow, but also has some shortcomings, is no more than 180 degree as adjustable scope, and the precision of adjusting is relatively poor, to the requirement height of motor of control valve core rotation, has correspondingly improved the cost of modulating valve.

The model utility content

In order to solve above-mentioned deficiency of the prior art, the utility model provides the linear flow adjustable valve of a kind of degree of regulation height, convenient control.

For solving the problems of the technologies described above, the utility model adopts following technological scheme:

A kind of linear flow adjustable valve comprises valve body and spool, and spiral helicine sealing surface is set on spool, and communication port is set on the valve body;

The sealing surface of spool cooperates with the internal surface of valve body, and described sealing surface is linear change with the area that overlaps between communication port with respect to rotation angle when spool and valve body relatively rotate;

Valve body and spool all do not have axial displacement.

In above-mentioned linear flow adjustable valve, described spiral helicine sealing surface can be arranged on the internal surface of valve body, and communication port is arranged on the spool.

As preferably, spiral helicine sealing surface is set on the outer surface of spool.

As preferably, described outer surface and internal surface are the cylndrical surface.

As preferably, described spool in a tubular form.

As preferably, described spiral helicine sealing surface expands into right-angled triangle in the plane.

As preferably, described communication port parallelogram, wherein limit is parallel to the hypotenuse of described right-angled triangle.

Basic principle of the present utility model is: relatively rotating in the process of spool and valve body, coincidence area between spiral helicine sealing surface and the communication port is a linear change with respect to rotation angle, thereby making the fluid area that flows through communication port also is linear change with respect to rotation angle, and then has realized the purpose of linearly adjust fluid flow.

The utility model compared with prior art has following beneficial effect:

1, effectively regulation range is big.

Because helix structure can be set to a circle, effectively the linearly adjust scope can be near 360 degree.

2, degree of regulation height.

Adjustment stroke is elongated by spiral-shaped, and the single step degree of regulation is higher.

3, convenient control is to the required precision reduction of motor.

Description of drawings

Fig. 1 is the structural representation of prior art neutral line modulating valve;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the part-structure schematic representation of spool among the embodiment 1;

Fig. 4 is the part-structure schematic representation of spool among the embodiment 2;

Fig. 5 is the part-structure schematic representation of valve body among the embodiment 1,2;

Fig. 6 is the part-structure schematic representation of valve body among the embodiment 3;

Fig. 7 is the part-structure schematic representation of spool among the embodiment 3;

Fig. 8 is that circulation area changes schematic representation among the embodiment 1-3;

Fig. 9 is that circulation area changes schematic representation among the embodiment 4;

Figure 10 is a circulation area schematic representation among the embodiment 5.

Embodiment

Below in conjunction with embodiment, the utility model is done further detailed description.

Embodiment 1:

As Fig. 3, Fig. 5, shown in Figure 8, a kind of linear flow adjustable valve comprises valve body 41 and spool 51, and valve body 41 and spool 51 can relatively rotate.

The bottom of spool 51 is a round tube shape structure, has spiral helicine sealing surface 81 on the tubular structure, and spiral helicine sealing surface 81 expands into a right angle triangle 810 in the plane.

Communication port 61 is arranged on the valve body 41, is shaped as parallelogram 610, and wherein limit is parallel to the hypotenuse of described right-angled triangle 810, and another limit is parallel to the rotatingshaft of spool 51.Spiral helicine sealing surface 81 closely contacts with communication port 61.

The working principle of above-mentioned modulating valve is: spiral helicine sealing surface 81 closely cooperates with communication port 61, relatively rotating in the process of spool 51 and valve body 41, the coincidence that spiral helicine sealing surface 81 and communication port are 61 also promptly is equivalent to fixed parallelogram 610 and the coincidence of 810 of the right-angled triangles that move, see also shown in Figure 8, rotation along with spool 51, right-angled triangle 810 is started from scratch with the area that overlaps of 610 of parallelogram, and progressively increases.

The arc length that turns at Δ t time inner spool 51 is:

Δl＝R·Δα

Wherein R is the radius of gyration of spool 51, and Δ α is the angle that turns over.

In the rotation of described Δ t time internal spiral shape sealing surface 81, be equivalent to right-angled triangle 810 and moved forward Δ x=Δ l, right-angled triangle 810 has increased with the area that overlaps of 610 of parallelogram so:

ΔS＝a·h＝a·Δx·sinβ＝a·R·Δα·sinβ

$\frac{\mathrm{\ΔS}}{\mathrm{\Δ\α}}=a\·R\·\sin \mathrm{\β}$

A is the length of side on a limit of parallelogram 610, and β is the hypotenuse of right-angled triangle 810 and the angle between the base.

Therefore, be linear relationship between the variation of coincidence area and the rotation angle, the variation that also is the fluid flow area also is linear, thereby has realized the linearly adjust of fluid flow.

Spool 51 rotate a circle (spool 51 and valve body 41 all do not have axial motion), the coincidence area that spiral helicine sealing surface 81 and communication port are 61 changes to maximum from zero line, also be that circulation area is reduced to zero from maximum linear, effective adjusting angle of spool 51 is near 360 degree, effectively the increase of adjusting angle has improved the precision of regulating, also reduced driving the requirement of spool motor rotating, reduced cost.

Embodiment 2:

Shown in Fig. 4,5, a kind of linear flow adjustable valve, as different from Example 1:

1, spool is a cylindrical body, and spiral helicine sealing surface is set on the outer surface;

2, spool maintains static, and valve body rotates.

The working principle of above-mentioned linear flow adjustable valve is identical with embodiment 1, and the variation that overlaps area between the communication port of helical sealing surface and parallelogram shape sees also Fig. 8.

Embodiment 3:

Shown in Fig. 6,7, a kind of linear flow adjustable valve, as different from Example 1:

1, spiral helicine sealing surface is on the internal surface of valve body;

2, spool is a tubulose, is provided with the breach of parallelogram above, as communication port;

3, spool maintains static, and valve body rotates.

The working principle of above-mentioned linear flow adjustable valve is identical with embodiment 1, and the variation that overlaps area between the communication port of helical sealing surface and parallelogram shape sees also Fig. 8.

Embodiment 4:

A kind of linear flow adjustable valve, as shown in Figure 9, as different from Example 2:

1, have spiral helicine sealing surface on the spool, spiral helicine sealing surface expands into triangle 210 in the plane.

2, communication port is arranged on the valve body, is shaped as rectangle 310.

The working principle of above-mentioned modulating valve is: spiral helicine sealing surface and communication port closely cooperate, relatively rotating in the process of spool and valve body, coincidence between spiral helicine sealing surface and communication port also promptly is equivalent to triangle 210 and the coincidence of 310 in the rectangle that moves, along with the rotation of valve body, overlap area and progressively increase.

The arc length that turns at the relative valve body of Δ t time inner spool is:

Wherein R is the radius of gyration of valve body,

Be the angle that turns over.

The rotation of communication port in the described Δ t time is equivalent to triangle 210 and has moved forward Δ x=Δ l, and triangle 210 has increased with the area that overlaps of 310 in rectangle so:

A is a length of side of rectangle 310, and α, β are adjacent both sides of triangle 210 and the angle between 310 1 limits of rectangle.

Therefore, be linear relationship between the variation of coincidence area and the rotation angle, the variation that also is the fluid flow area also is linear, thereby has realized the linearly adjust of fluid flow.

Embodiment 5:

A kind of linear flow adjustable valve, as shown in figure 10, as different from Example 2:

1, the spiral helicine sealing surface that has on the spool expands into figure 110 in the plane, and wherein, top 1101 is in curve y=10x ³On+the 5x, following 1102 are in curve y=10x ³On.

2, communication port is arranged on the valve body, is shaped as rectangle 410.

3, valve core rotation, valve body is fixed.

The working principle of above-mentioned modulating valve is: spiral helicine sealing surface and communication port closely cooperate, relatively rotating in the process of spool and valve body, coincidence between spiral helicine sealing surface and communication port also promptly is equivalent to fixed rectangle 410 and the coincidence of 110 in the figure that moves, along with the rotation of spool, the coincidence area that rectangle 410 and the figure that moves are 110 progressively changes.

The arc length that turns at Δ t time inner spool is:

Δl＝R·Δα

Wherein R is the radius of gyration of spool, and Δ α is the angle that turns over.

In the rotation of described Δ t time internal spiral shape sealing surface, be equivalent to figure 110 and moved forward Δ x=Δ l, so figure 110 and 410 in rectangle overlapped area change:

$\mathrm{\ΔS}={\∫}_{\mathrm{\Δx}}^{\mathrm{\Δx}+a}({10x}^3+5x-10x^3)\mathrm{dx}-{\∫}_0^a({10x}^3+5x-10x^3)\mathrm{dx}$

$=5a\·\mathrm{\Δx}$

$\frac{\mathrm{\ΔS}}{\mathrm{\Δ\α}}=5a\·R$

A is a length of side of rectangle 410.

Therefore, be linear relationship between the variation of coincidence area and the rotation angle, the variation that also is the fluid flow area also is linear, thereby has realized the linearly adjust of fluid flow.

Above-mentioned mode of execution should not be construed as the restriction to the utility model protection domain.Key of the present utility model is: on spool (valve body) spiral helicine sealing surface is set, on the valve body (spool) communication port is set; Sealing surface cooperates with communication port, makes when spool and valve body relatively rotate described sealing surface be linear change with the area that overlaps between communication port with respect to rotation angle; Valve body and spool all do not have axial displacement.Under the situation that does not break away from the utility model spirit, any type of change that the utility model is made all should fall within the protection domain of the present utility model.

Claims (7)

1. a linear flow adjustable valve comprises valve body and spool, it is characterized in that: spiral helicine sealing surface is set on spool, communication port is set on the valve body;

The sealing surface of spool cooperates with the internal surface of valve body, and described sealing surface is linear change with the area that overlaps between communication port with respect to rotation angle when spool and valve body relatively rotate;

Valve body and spool all do not have axial displacement.

2. modulating valve according to claim 1 is characterized in that: described spiral helicine sealing surface is arranged on the internal surface of valve body, and communication port is arranged on the spool.

3. modulating valve according to claim 1 is characterized in that: spiral helicine sealing surface is set on the outer surface of spool.

4. modulating valve according to claim 1 and 2 is characterized in that: described outer surface and internal surface are the cylndrical surface.

5. modulating valve according to claim 1 and 2 is characterized in that: described spool in a tubular form.

6. modulating valve according to claim 1 and 2 is characterized in that: described spiral helicine sealing surface expands into right-angled triangle in the plane.

7. modulating valve according to claim 6 is characterized in that: described communication port parallelogram, wherein limit is parallel to the hypotenuse of described right-angled triangle.

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