CN208935468U - A kind of more fluid path switching valves - Google Patents

Abstract

The utility model discloses a kind of more fluid path switching valves, by by spool design at circular platform type, so that when long-term rotation makes the contact surface of spool and valve body that abrasion all occur seal request is not achieved, by way of promoting gravity or by hand, both still being able to make to coincide reaches the requirement of sealing；Further, increase elastic device, by the effect of elastic device so that always in the state for compressing sealing between spool and valve body；So that the service life of more fluid path switching valves extends, and the requirement of sealing can be reached always.

Description

A kind of more fluid path switching valves

Technical field

The utility model relates to a kind of more fluid path switching valves, belong to Medical Devices Instrument technology field.

Background technique

Currently, the fluid path in medical equipment and instrument switches, constituted using by sensing element, control circuit, solenoid valve etc. Switching device, control mode be manually control and the time control.The major advantage of this fluid path switching device is to be easy to real Now automation and programmed operation, operate also more convenient, therefore it is using relatively broad.

Existing a kind of simple more fluid path switching valves, by taking triple valve as an example, as shown in Figure 1, on valve body there are three settings In the fluid path interface of 120 degree of angles, 120 degree of 2 holes being connected also are dug on spool, spool is rotatable, by rotating valve Core may make that two on valve body in three fluid path interfaces are connected to.There are also the more liquid of various specifications such as four-way valve, six-way valve in practice Road switching valve.

Above-mentioned more fluid path switching valves in use, equally by taking triple valve as an example, due to spool in actual use It needs to rotate and just can turn on the fluid path interface for needing to connect on valve body, and long-term rotation can undoubtedly make contact of the spool with valve body Face is all worn, and seal request is just not achieved after abrasion to a certain extent, needs replacing corresponding valve body spool, this is resulted in More fluid path switching valve service lifes are short, may also result in bigger loss when liquid leakage occurs.

Utility model content

Wear the contact surface of spool and valve body all to solve above-mentioned long-term rotation, after abrasion to a certain extent The problem of seal request is not achieved, the utility model provide a kind of more fluid path switching valves.

More fluid path switching valves provided by the utility model, including valve body and spool, the spool are truncated cone-shaped, the spool With rotation axis connection for diameter it is big while, with the recess matched with spool shape on valve body, on the valve body Offer n two-by-two and be in the fluid path interface of fixed angle, offered on spool m it is logical in being connected for fixed positional relationship Road hole makes m fluid path interface on valve body in n fluid path interface pass through m access opening connection on spool by rotational valve core.

In one embodiment, more fluid path switching valves further include elastic device, elastic device one end connection In the big one side of the diameter of the spool, the elastic device other end is fixed on valve body.

In one embodiment, the elastic device includes spring.

In one embodiment, 2≤m≤n.

In one embodiment, the n is two-by-two in the fluid path interface of fixed angle, any two fluid path interface it Between angle be

The advantages of the utility model:

More fluid path switching valves provided by the utility model, by by spool design at circular platform type so that in long-term rotation Make the contact surface of spool and valve body that abrasion all occur when seal request is not achieved, by way of promoting gravity or by hand, still It so that the two is coincide and reach the requirement of sealing；Further, increase elastic device, by the effect of elastic device so that valve Always in the state for compressing sealing between core and valve body；So that the service life of more fluid path switching valves extends, and always can Reach the requirement of sealing.

Detailed description of the invention

Fig. 1 is triple valve schematic top plan view；

Fig. 2 is traditional triple valve schematic elevation view；

Fig. 3 is the utility model triple valve schematic elevation view；

Fig. 4 is the utility model triple valve overall schematic；

Wherein, 1 is spool, and 2 be valve body, is provided with 3 fluid path interfaces, respectively fluid path interface a, b, c on valve body 2,3 It is spring for rotation axis, 4.

Specific embodiment

Here is that the utility model is specifically described.

Embodiment 1

The utility model provides a kind of more fluid path switching valves, including valve body and spool, and the spool is truncated cone-shaped, the valve Core and rotation axis connection for diameter it is big while, with the recess matched with spool shape, the valve body on valve body On offer n two-by-two and be in the fluid path interface of fixed angle, offered on spool m it is logical in being connected for fixed positional relationship Road hole makes m fluid path interface on valve body in n fluid path interface pass through m access opening connection on spool by rotational valve core；

More fluid path switching valves further include elastic device, and the diameter that described elastic device one end is connected to the spool is big One side, the elastic device other end is fixed on valve body；

The elastic device includes spring；

2≤m≤n；The n are in the angle between any two fluid path interface in the fluid path interface of fixed angle two-by-two For

The present embodiment is by taking triple valve as an example, as shown in Figure 1, being respectively communicated with fluid path interface a and b, fluid path interface a and c, fluid path Interface b and c are not connected to any fluid path interface；

Triple valve n=3, usual settable triple valve can be connected to any two fluid path interface, m=2, then settable three liquid Angle in the interface of road between any two fluid path interface is

It is 120 degree that the angle between the through-hole being connected on spool, which is arranged, also, then in actual use, can pass through rotational valve core Realize the connection between any two fluid path interface.

If four-way valve, then n=4, the angle in four-way valve between any two fluid path interface is set as 90 degree, if this four Port valve can be connected to any two fluid path interface, and m=2, then the angle between through-hole being connected on settable spool is also 90 degree； If the four-way valve can be connected to any three fluid path interfaces, m=3, then one between through-hole being connected on settable spool is led to Angle between hole and other two through-holes is 90 degree, and the angle between other two through-holes is 180 degree；Three can be so connected to A fluid path interface.

The more fluid path orifice principles of remaining specification are similar, do not repeating here.

It needs to be illustrated, may be alternatively provided as m=n in actual use as needed.

As shown in Fig. 2, then leading to spool 1 and valve by long-time rotational valve core 1 for the schematic elevation view of traditional triple valve Body 2 is all worn, then will appear gap between spool 1 and valve body 2, certainly will will lead to the triple valve and seal problem not up to standard Occur.

Working principle of the utility model is:

As shown in figure 3, being the schematic elevation view of more fluid path switching valves provided by the utility model, when by rotating for a long time It, can be real by the elastic device 4 being arranged between spool 1 and valve body 2 when spool 1 causes spool 1 and valve body 2 to be all worn Now by 1 push-tight of spool to reach seal request.

If not set elastic device 4, when more fluid path switching valves are placed vertically can by the effect of gravity so that spool to Lower propulsion, to reach seal request；Meanwhile manually can also be promoted spool 1 by rotation axis 3, to reach seal request.

By more fluid path switching valves provided by the utility model, the service life of existing more fluid path switching valves can be extended, at it Always it can achieve seal request in use process.

Fig. 4 is the triple valve overall schematic of the utility model.

Although the utility model has been described by way of example and in terms of the preferred embodiments, it is not intended to limit the utility model, any Person skilled in the art can do various change and modification, therefore this without departing from the spirit and scope of the utility model The protection scope of utility model should subject to the definition of the claims.

Claims (5)

1. a kind of more fluid path switching valves, including valve body and spool, which is characterized in that the spool be truncated cone-shaped, the spool with Rotate axis connection for diameter it is big while, with the recess matched with spool shape on valve body, opened on the valve body Two-by-two it is in the fluid path interface of fixed angle equipped with n, the m channels being connected in fixed positional relationship is offered on spool Hole makes m fluid path interface on valve body in n fluid path interface pass through m access opening connection on spool by rotational valve core.

2. more fluid path switching valves according to claim 1, which is characterized in that more fluid path switching valves further include elastic dress It sets, the big one side of the diameter that described elastic device one end is connected to the spool, the elastic device other end is fixed on valve body On.

3. more fluid path switching valves according to claim 2, which is characterized in that the elastic device includes spring.

4. more fluid path switching valves according to claim 3, which is characterized in that 2≤m≤n.

5. more fluid path switching valves according to claim 4, which is characterized in that the n two-by-two in the fluid path of fixed angle In interface, the angle between any two fluid path interface is。