A multi-stage linkage sleeve valve
By designing a multi-stage linkage sleeve valve, the combination of the outer sleeve, inner sleeve and mobile sleeve group is used to achieve more efficient media flow control, solving the problem of poor regulation performance of existing sleeve valves and improving the reduction Pressure capacity and service life.
Patent Information
- Application Number
- CN202011014679.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-09-24
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2040-09-24
AI Technical Summary
The adjustment performance of existing sleeve valves is poor, and the adjustment opening of the valve within the adjustment stroke range is not linear with the changes in the medium flow rate, which leads to inconvenience in use.
Design a multi-stage linkage sleeve valve, including an outer sleeve, an inner sleeve and a moving sleeve group, the bottom end of the outer sleeve is closed and the center is equipped with a channel, the inner sleeve is an annular body, and the moving sleeve group is on the shaft To move to control the valve port, the power mechanism is driven by a motor to realize the up and down movement of the valve stem.
It improves the pressure reduction ability and service life, and makes adjustments more accurate, avoiding the problems of poor adjustment performance of conventional valves and difficult to adjust at high pressure.
Smart Images
Figure CN111998085B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a valve, in particular to a sleeve valve. Background Art
[0002] Valves are control components in pipeline fluid delivery systems. They are used to change the cross-section of the passage and the flow direction of the medium. They have functions such as diversion, cut-off, throttling, check, diversion or overflow pressure relief.
[0003] There are many types of existing sleeve valves, but most of them have poor regulating performance; especially within the regulating stroke range, the regulating opening of the valve and the change of the medium flow cannot maintain a linear relationship, which brings inconvenience to the application of the valve. Summary of the invention
[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned background technology and provide a multi-stage linkage sleeve valve, which should have the characteristics of large adjustment stroke and easy use.
[0005] The technical solution provided by the present invention is:
[0006] A multi-stage linkage sleeve valve, comprising a valve body with an inlet channel and an outlet channel at the bottom, an outer sleeve vertically installed between the inlet channel and the outlet channel and having a plurality of through holes on the circumferential surface, a valve stem movably arranged in the valve body, and a power mechanism installed on the top of the valve body to drive the valve stem; characterized in that: the bottom end surface of the outer sleeve is closed and a channel opening is opened in the center of the end surface for facilitating the flow of medium, and an inner sleeve coaxially arranged with the outer sleeve is fixed on the upper surface of the bottom end surface, the inner sleeve is an annular body and has a plurality of through holes on the circumferential surface, and the outer circumference of the inner sleeve The valve stem is provided with a movable sleeve group which can move axially in the said spacing and is fixed to the bottom end of the valve stem. The movable sleeve group is a large sleeve and a small sleeve which are arranged coaxially. The outer circumferential surface of the small sleeve can slide with the inner circumferential surface of the inner sleeve, and the outer circumferential surface of the large sleeve can slide with the inner circumferential surface of the outer sleeve, wherein the bottom end surface of the small sleeve forms a valve port which can be opened and closed with the said passage opening; the bottom end surface of the small sleeve also extends downward to form a small annular body with a plurality of openings on the circumferential surface, and the outer circumferential surface of the small annular body is suitable for the said passage opening.
[0007] The outer sleeve is arranged at the intersection of the inlet channel and the outlet channel and is coaxially arranged with the valve stem; the outer circumferential surface of the outer sleeve is located in one of the channels, the channel opening of the bottom end face of the outer sleeve is connected to the other channel and the top end face is blocked by the inner wall of the valve body.
[0008] The power mechanism comprises a motor and a screw mechanism driven by the motor.
[0009] The beneficial effects of the present invention are as follows: since the valve of the present invention is provided with three linked sleeves, the pressure reduction capacity is greatly improved (2-3 times that of conventional valves) and the service life is also extended; the defect that the pressure reduction of conventional valves is concentrated on the primary sleeve, resulting in severe erosion of the sealing surface and short service life is solved; and the adjustment is more precise, avoiding the problem that the conventional valves have poor adjustment performance and are difficult to adjust at high pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a main structural schematic diagram of the present invention.
[0011] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A in FIG.
[0012] Figure 3 yes Figure 2 Schematic diagram of the structure of the outer sleeve and the inner sleeve.
[0013] Figure 4 yes Figure 2 Schematic diagram of the structure of the moving sleeve group. DETAILED DESCRIPTION
[0014] The following is a further description with reference to the embodiments shown in the accompanying drawings.
[0015] In the multi-stage linkage sleeve valve described in the attached drawings, the bottom of the valve body 2 is provided with an inlet channel 11 and an outlet channel 7; the outer sleeve 5 is installed between the inlet channel and the outlet channel, and the circumferential surface of the outer sleeve is provided with a plurality of through holes 5.1 for the medium (steam or / water) to flow; the valve stem 3 is vertically arranged in the valve body and can move in the axial direction (cannot rotate); the power mechanism 1 installed on the top of the valve body is used to drive the valve stem. The above structure is similar to the existing sleeve valve.
[0016] The improvement of the present invention is that: the bottom end face of the outer sleeve is closed and a channel opening 5.3 is provided in the center of the end face for facilitating the flow of medium; an inner sleeve 5.2 is provided on the upper surface of the bottom end face, and the inner sleeve is an annular body coaxially arranged with the outer sleeve, and a plurality of through holes are provided on the circumferential surface of the annular body for facilitating the flow of medium; the outer circumferential surface of the inner sleeve maintains a spacing with the inner circumferential surface of the outer sleeve (the spacing size is selected according to needs); a movable sleeve group is fixed to the bottom end of the valve stem, and the movable sleeve group can move axially within the spacing; the movable sleeve group is a coaxially arranged large sleeve 6.1 and a small sleeve 6.2, the outer circumferential surface of the small sleeve can slide with the inner circumferential surface of the inner sleeve, and the outer circumferential surface of the large sleeve can slide with the inner circumferential surface of the outer sleeve; in addition, the bottom end face of the small sleeve and the channel opening form a valve port that can be opened and closed, thereby controlling the flow of medium flowing through the channel opening. The bottom end surface of the small sleeve further extends downward to form a small annular body 6.3, the circumferential surface of which is provided with a plurality of openings for medium circulation; the outer circumferential surface of the small annular body is adapted to the inner diameter of the passage opening.
[0017] Furthermore, the outer sleeve is arranged at the intersection of the inlet channel and the outlet channel (isolating the inlet channel and the outlet channel from each other) and is coaxially arranged with the valve stem. The outer circumferential surface of the outer sleeve is located in one of the channels; the channel opening at the bottom end surface of the outer sleeve is connected to the other channel, and the top end surface is closed by the inner wall of the valve body.
[0018] The power mechanism comprises a motor and a screw mechanism driven by the motor.
[0019] The working principle of the present invention is:
[0020] In the closed state, the valve stem drives the movable sleeve assembly to sink until the small annular body is engaged with the upper edge of the channel opening, thereby closing the inlet channel and the outlet channel (closing the valve opening); therefore, the valve is in the closed state.
[0021] When it needs to be opened, the power mechanism is started and the movable sleeve group is pulled up through the valve stem; the number of blocked through holes on the inner sleeve and the outer sleeve gradually increases, and the medium in the channel of the outer circumference of the outer sleeve can pass through the through holes on the outer sleeve and the inner sleeve in turn, and then enter another channel on the bottom end face of the outer sleeve through the opening on the small annular body (or the medium moves in the opposite direction); the movable sleeve group is further lifted until the bottom end of the annular body exceeds the highest row of through holes of the outer sleeve. At this time, the medium in the channel of the outer circumference passes through the through holes on the outer sleeve and the inner sleeve in turn, and directly enters another channel on the bottom end face of the outer sleeve from the channel opening (or the medium moves in the opposite direction); the flow rate reaches the maximum value.
Claims
1. A multi-stage linkage sleeve valve, comprising a valve body with an inlet channel (11) and an outlet channel (7) at the bottom, an outer sleeve (5) vertically installed between the inlet channel and the outlet channel and having a plurality of through holes on the circumferential surface, a valve stem (2) movably arranged in the valve body, and a power mechanism (1) installed on the top of the valve body to drive the valve stem; characterized in that: The bottom end face of the outer sleeve is closed and a channel opening (5.3) is provided in the center of the end face for medium circulation, and an inner sleeve (5.2) arranged coaxially with the outer sleeve is fixed on the upper surface of the bottom end face, the inner sleeve is an annular body and a plurality of through holes are provided on the circumferential surface, and the outer circumferential surface of the inner sleeve maintains a spacing with the inner circumferential surface of the outer sleeve; a movable sleeve group capable of axial movement in the spacing is fixed on the bottom end of the valve stem, the movable sleeve group is a large sleeve (6.1) and a small sleeve (6.2) arranged coaxially, the outer circumferential surface of the small sleeve can be slidably matched with the inner circumferential surface of the inner sleeve, and the outer circumferential surface of the large sleeve can be slidably matched with the inner circumferential surface of the outer sleeve, wherein the bottom end face of the small sleeve and the channel opening form a valve opening that can be opened and closed; the bottom end face of the small sleeve also extends downward to form a small annular body (6.3) with a plurality of openings on the circumferential surface, and the outer circumferential surface of the small annular body is matched with the channel opening.
2. The multi-stage linkage sleeve valve according to claim 1, characterized in that: The outer sleeve is arranged at the intersection of the inlet channel and the outlet channel and is coaxially arranged with the valve stem; the outer circumferential surface of the outer sleeve is located in one of the channels, the channel opening of the bottom end face of the outer sleeve is connected to the other channel and the top end face is blocked by the inner wall of the valve body.
3. The multi-stage linkage sleeve valve according to claim 2, characterized in that: The power mechanism comprises a motor and a screw mechanism driven by the motor.