Sliding plate regulating valve capable of realizing flow characteristic

Abstract

The invention discloses a sliding plate adjusting valve capable of achieving flow characteristics. The sliding plate adjusting valve comprises a valve body. A valve inner cavity is formed in the valve body, and a fixed sliding plate and a movable sliding plate which completely cover the section of the valve inner cavity and are parallel to each other are installed in the valve inner cavity. A plurality of rectangular movable sliding plate throttling grooves are formed in the movable sliding plate in parallel at intervals, and the sliding direction of the movable sliding plate is the width direction of the movable sliding plate throttling grooves; the fixed sliding plate is provided with a plurality of fixed sliding plate throttling grooves which are parallel to one another at intervals, the fixed sliding plate throttling grooves are parallel to the movable sliding plate throttling grooves, the interval between every two adjacent movable sliding plate throttling grooves is larger than the width of the fixed sliding plate throttling grooves, and the interval between every two adjacent fixed sliding plate throttling grooves is larger than the width of the movable sliding plate throttling grooves. The sliding plate adjusting valve capable of achieving the flow characteristic is reasonable in structural design, and the flow characteristic of the adjusting valve is achieved through cooperation of the throttling grooves in the fixed sliding plate and the movable sliding plate; and the three-dimensional shape design is converted into the two-dimensional planar slotted hole shape design, so that the processing is simple, the cost is low, and the application prospect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of regulating valves, and in particular to a slide plate regulating valve capable of realizing flow characteristics, and in particular to a slide plate regulating valve capable of realizing various flow characteristics through a two-dimensionally designed slide plate. Background Art

[0002] A regulating valve is a valve used to adjust process parameters such as medium flow, pressure, temperature, liquid level, etc. in the field of industrial automation process control. It automatically adjusts the valve opening according to the control signal in the automation system, thereby achieving the regulation of medium flow, pressure, temperature and liquid level.

[0003] Flow characteristics are an important technical indicator and parameter of the control valve. It describes the relationship between the relative flow of the valve and the relative stroke of the valve stem. It is a factor that must be considered when designing and selecting the control valve. There are currently three main types of flow characteristics of the control valve: quick opening, linear, and equal percentage flow characteristics; quick opening flow characteristics: the relative flow increases rapidly within a period of time at the beginning of the relative stroke; linear flow characteristics: there is a linear relationship between the relative flow and the relative stroke of the valve stem; equal percentage (logarithmic) flow characteristics: at each point in the stroke, the flow change caused by a unit stroke change is proportional to the flow at this point. This characteristic has a small flow change when the flow is small and a large flow change when the flow is large, and has good regulation performance and adaptability.

[0004] Achieving accurate flow characteristics is a factor that must be considered when designing a control valve. Conventional linear control valves such as Figure 1 As shown in the figure, the throttling hole of the valve seat is circular, and the valve core is a plunger type. When the stroke changes, the position of the valve core changes, and the throttling area through which the relative flow energy flows changes, that is, the area of ​​the valve seat minus the area of ​​the valve core, while the area of ​​the valve seat remains unchanged, so the corresponding flow characteristics are mainly achieved through the shape design of the valve core. The shapes of different valve cores corresponding to the quick opening, linear and equal percentage flow characteristics are shown in the figure below. Figures 2~4 As shown, especially the equal percentage flow characteristic, the valve core shape is irregular and difficult to process.

[0005] Therefore, it is of great practical significance to develop a control valve that is easy to process and low in cost and can achieve flow characteristics. Summary of the invention

[0006] In view of the above-mentioned defects in the prior art, the present invention provides a regulating valve which can realize flow characteristics and is easy to process and low in cost. Specifically, it is a slide plate regulating valve which can realize various flow characteristics through a two-dimensionally designed slide plate, which solves the defects of the existing regulating valves which realize flow characteristics, that is, the valve core has an irregular shape and is difficult to process.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A slide plate regulating valve capable of realizing flow characteristics, comprising a valve body;

[0009] The valve body has a valve inner cavity, and a fixed slide plate and a movable slide plate which completely cover the cross section of the valve inner cavity are installed in the valve inner cavity, the fixed slide plate and the movable slide plate are parallel to each other, and the movable slide plate is connected to a movable slide plate driving rod;

[0010] The moving slide plate is provided with a plurality of moving slide plate throttling grooves which are parallel to each other and arranged at intervals, the sliding direction of the moving slide plate is the width direction of the moving slide plate throttling grooves, and the moving slide plate throttling grooves are in the shape of long strips;

[0011] The fixed slide plate is provided with a plurality of fixed slide plate throttling grooves which are parallel to each other and arranged at intervals. The arrangement direction of the fixed slide plate throttling grooves is parallel to the arrangement direction of the moving slide plate throttling grooves. The spacing between adjacent moving slide plate throttling grooves is greater than the width of the fixed slide plate throttling grooves and the spacing between adjacent fixed slide plate throttling grooves is greater than the width of the moving slide plate throttling grooves.

[0012] The slide plate regulating valve capable of realizing flow characteristics of the present invention has a reasonable structural design, and the flow characteristics of the regulating valve are realized by the cooperation of the throttling grooves on the fixed slide plate and the movable slide plate. When the movable slide plate follows the moving slide plate driving rod to move up and down, the throttling area changes, thereby realizing precise regulation of the medium flow, and converting the three-dimensional shape design into a two-dimensional plane slot shape design. After completing the shape design / processing of the throttling groove, accurate flow characteristics can be obtained. The processing is simple and low-cost. Different flow characteristics can be realized by different designs of the shape of the throttling slot hole of the fixed slide plate, and the application prospect is good.

[0013] As the preferred technical solution:

[0014] In the slide regulating valve capable of realizing flow characteristics as described above, the moving slide driving rod is driven by a valve driving device.

[0015] As described above, for a slide regulating valve capable of realizing flow characteristics, the throttling slot of the fixed slide is rectangular, and the change of the stroke, the change of the throttling area and the change of the stroke are linearly related, so the flow characteristic of the valve is a linear flow characteristic.

[0016] As described above, in a slide regulating valve capable of realizing flow characteristics, the throttling slot of the fixed slide is an irregular shape matching the equal percentage flow characteristics. When the stroke just starts to change, the flow changes slightly. When the stroke reaches a large value, the flow changes greatly and shows an equal percentage change. Therefore, the flow characteristic of the valve is an equal percentage flow characteristic.

[0017] A slide regulating valve capable of realizing flow characteristics as described above, wherein the throttling slot of the fixed slide comprises an upper rectangular hole, an upper isosceles trapezoidal hole, a middle rectangular hole, a lower isosceles trapezoidal hole and a lower oblong hole which are coaxial and connected in sequence;

[0018] The lower long side of the upper rectangular hole is connected to the upper base of the upper isosceles trapezoidal hole, the lower base of the upper isosceles trapezoidal hole is connected to the upper long side of the middle rectangular hole, the lower long side of the middle rectangular hole is connected to the upper base of the lower isosceles trapezoidal hole, the lower base of the lower isosceles trapezoidal hole is connected to the upper long side of the lower oblong hole, the length of the upper rectangular hole is equal to the length of the upper base of the upper isosceles trapezoidal hole, the length of the lower base of the upper isosceles trapezoidal hole is greater than the length of the upper base of the upper isosceles trapezoidal hole, the length of the middle rectangular hole is equal to the length of the upper base of the lower isosceles trapezoidal hole, the length of the lower base of the lower isosceles trapezoidal hole is greater than the length of the upper base of the lower isosceles trapezoidal hole, and the length of the lower oblong hole is greater than the length of the lower base of the lower isosceles trapezoidal hole.

[0019] In the slide regulating valve capable of realizing flow characteristics as described above, the throttling groove of the fixed slide matches the throttling groove of the moving slide.

[0020] A slide regulating valve capable of realizing flow characteristics as described above, wherein the plurality of fixed slide throttling grooves on the fixed slide have the same shape and different sizes, and the size of the fixed slide throttling grooves on the fixed slide is larger in the middle and smaller on both sides;

[0021] The multiple moving slide throttling grooves on the moving slide have the same shape but different sizes. The size of the moving slide throttling grooves on the moving slide is larger in the middle and smaller on both sides.

[0022] The above technical solution is only a feasible technical solution of the present invention, and the protection scope of the present invention is not limited thereto. Those skilled in the art can reasonably adjust the specific design according to actual needs.

[0023] The above invention has the following advantages or beneficial effects:

[0024] (1) The slide regulating valve capable of realizing flow characteristics of the present invention has a reasonable structural design. The flow characteristics of the regulating valve are realized by the cooperation of the throttling grooves on the fixed slide and the movable slide. When the movable slide follows the moving slide driving rod up and down, the throttling area changes, thereby realizing accurate regulation of the medium flow.

[0025] (2) The slide regulating valve capable of realizing flow characteristics of the present invention transforms the three-dimensional shape design into a two-dimensional slot shape design. Accurate flow characteristics can be obtained by completing the shape design / processing of the throttling slot. The processing is simple and low-cost. Different flow characteristics can be realized by different designs of the shape of the throttling slot of the fixed slide, and the application prospect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and emphasis is placed on illustrating the subject matter of the present invention.

[0027] Figure 1 It is a cross-sectional schematic diagram of a regulating valve in the prior art;

[0028] Figures 2~4 They are schematic diagrams of quick-opening valve core, linear valve core and equal percentage valve core respectively;

[0029] Figure 5 It is a cross-sectional view inside the slide plate regulating valve capable of realizing flow characteristics of the present invention;

[0030] Figure 6 is a top view of the fixed sliding plate of Example 1;

[0031] Figure 7 is a top view of the fixed sliding plate of Example 2;

[0032] Figure 8 for Figure 7 A schematic diagram of a throttle groove of a fixed slide plate;

[0033] Among them, 1 is a fixed slide plate, 11 is a throttling groove of the fixed slide plate, 111 is an upper rectangular hole, 112 is an upper isosceles trapezoidal hole, 113 is a middle rectangular hole, 114 is a lower isosceles trapezoidal hole, 115 is a lower oblong hole, 2 is a movable slide plate, 3 is a movable slide plate driving rod, 4 is a valve inner cavity, 5 is a valve core, 6 is a valve core driving rod, and 7 is a valve body. DETAILED DESCRIPTION

[0034] The present invention is further described below with reference to the accompanying drawings and specific embodiments, but is not intended to be a limitation of the present invention.

[0035] The regulating valve of the prior art is as follows Figure 1 As shown, the valve inner cavity 4 in the valve body 7 is provided with a circular valve seat throttling hole, where a plunger-type valve core 5 is installed. The valve core 5 is driven by a valve core driving rod 6. When the stroke changes, the position of the valve core changes, and the throttling area through which the relative flow energy flows changes.

[0036] The specific method is as follows Figures 2~4 The quick-opening valve core, linear valve core and equal percentage valve core shown can realize the quick-opening, linear and equal percentage flow characteristics of the regulating valve.

[0037] Example 1

[0038] A slide regulating valve that can achieve linear flow characteristics, such as Figure 5 As shown, it includes a valve body 7;

[0039] A valve cavity is formed inside the valve body 7, and a fixed slide plate 1 and a movable slide plate 2 are installed in the valve cavity to completely cover the cross section of the valve cavity. The fixed slide plate 1 and the movable slide plate 2 are parallel to each other, and the movable slide plate 2 is connected to a movable slide plate driving rod 3, and the movable slide plate driving rod 3 is driven by a valve driving device;

[0040] The moving slide plate 2 is provided with three moving slide plate throttling grooves which are parallel to each other and arranged at intervals. The sliding direction of the moving slide plate 2 is the width direction of the moving slide plate throttling groove. The moving slide plate throttling groove is a long strip (rectangular) shape. The three moving slide plate throttling grooves have the same shape but different sizes. The size of the moving slide plate throttling groove on the moving slide plate 2 is larger in the middle and smaller on both sides.

[0041] like Figure 6 As shown, the fixed slide plate 1 is provided with three fixed slide plate throttling grooves 11 which are parallel to each other and arranged at intervals. The fixed slide plate throttling groove holes are rectangular and match the moving slide plate throttling grooves. The three fixed slide plate throttling grooves 11 on the fixed slide plate 1 have the same shape but different sizes. The size of the fixed slide plate throttling grooves 11 on the fixed slide plate 1 is larger in the middle and smaller on both sides. The arrangement direction of the fixed slide plate throttling grooves 11 is parallel to the arrangement direction of the moving slide plate throttling grooves. The spacing between adjacent moving slide plate throttling grooves is greater than the width of the fixed slide plate throttling grooves 11 and the spacing between adjacent fixed slide plate throttling grooves 11 is greater than the width of the moving slide plate throttling grooves.

[0042] Example 2

[0043] A slide regulating valve capable of achieving equal percentage flow characteristics, which is substantially the same as Embodiment 1, except that the shape of the throttling slot of the fixed slide is different. The throttling slot of the fixed slide is as follows: Figure 7-8 As shown, it is an irregular shape matching the equal percentage flow characteristic, including an upper rectangular hole 111, an upper isosceles trapezoidal hole 112, a middle rectangular hole 113, a lower isosceles trapezoidal hole 114 and a lower oblong hole 115 that are coaxial and sequentially connected;

[0044] The lower long side of the upper rectangular hole 111 is connected to the upper base of the upper isosceles trapezoidal hole 112, the lower base of the upper isosceles trapezoidal hole 112 is connected to the upper long side of the middle rectangular hole 113, the lower long side of the middle rectangular hole 113 is connected to the upper base of the lower isosceles trapezoidal hole 114, the lower base of the lower isosceles trapezoidal hole 114 is connected to the upper long side of the lower oblong hole 115, the length of the upper rectangular hole 111 is equal to the length of the upper base of the upper isosceles trapezoidal hole 112, the length of the lower base of the upper isosceles trapezoidal hole 112 is greater than the length of the upper base of the upper isosceles trapezoidal hole 112, the length of the middle rectangular hole 113 is equal to the length of the upper base of the lower isosceles trapezoidal hole 114, the length of the lower base of the lower isosceles trapezoidal hole 114 is greater than the length of the upper base of the lower isosceles trapezoidal hole 114, and the length of the lower oblong hole 115 is greater than the length of the lower base of the lower isosceles trapezoidal hole 114.

[0045] Specifically, the applicant has designed and produced more than 100 slide valve products similar to Example 1 or 2 with more than 20 calibers, tested them, and applied them to the precise regulation of various gas, liquid, and steam media. After testing, it was found that Examples 1 and 2 can accurately achieve linear flow characteristics and equal percentage flow characteristics.

[0046] It has been verified that the slide plate regulating valve capable of realizing flow characteristics of the present invention has a reasonable structural design, and the flow characteristics of the regulating valve are realized by the cooperation of the throttling grooves on the fixed slide plate and the movable slide plate. In the process that the movable slide plate follows the moving slide plate driving rod to move up and down, the throttling area changes, thereby realizing precise regulation of the medium flow rate; the three-dimensional shape design is transformed into a two-dimensional plane slot shape design, and the shape design / processing of the throttling groove is completed to obtain accurate flow characteristics, the processing is simple and the cost is low, and different flow characteristics can be realized by different designs of the shape of the throttling slot hole of the fixed slide plate, and the application prospect is good.

[0047] Those skilled in the art should understand that those skilled in the art can implement variations by combining the prior art and the above embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present invention, and will not be described in detail here.

[0048] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A slide regulating valve capable of realizing flow characteristics, characterized in that: Including valve body; The valve body has a valve inner cavity, and a fixed slide plate and a movable slide plate which completely cover the cross section of the valve inner cavity are installed in the valve inner cavity, the fixed slide plate and the movable slide plate are parallel to each other, and the movable slide plate is connected to a movable slide plate driving rod; The moving slide plate is provided with a plurality of moving slide plate throttling grooves which are parallel to each other and arranged at intervals, the sliding direction of the moving slide plate is the width direction of the moving slide plate throttling grooves, and the moving slide plate throttling grooves are in the shape of long strips; The fixed slide plate is provided with a plurality of fixed slide plate throttling grooves which are parallel to each other and arranged at intervals. The arrangement direction of the fixed slide plate throttling grooves is parallel to the arrangement direction of the moving slide plate throttling grooves. The spacing between adjacent moving slide plate throttling grooves is greater than the width of the fixed slide plate throttling grooves and the spacing between adjacent fixed slide plate throttling grooves is greater than the width of the moving slide plate throttling grooves.

2. A slide regulating valve capable of realizing flow characteristics according to claim 1, characterized in that: The moving slide driving rod is driven by a valve driving device.

3. A slide plate regulating valve capable of realizing flow characteristics according to claim 1, characterized in that: The throttling slot of the fixed slide plate is a rectangle matching the linear flow characteristics.

4. A slide plate regulating valve capable of realizing flow characteristics according to claim 1, characterized in that: The throttling slot of the fixed slide plate is an irregular shape matching the equal percentage flow characteristic.

5. A slide regulating valve capable of realizing flow characteristics according to claim 4, characterized in that: The throttling slots of the fixed slide plate include an upper rectangular hole, an upper isosceles trapezoidal hole, a middle rectangular hole, a lower isosceles trapezoidal hole and a lower oblong hole which are coaxial and connected in sequence; The lower long side of the upper rectangular hole is connected to the upper base of the upper isosceles trapezoidal hole, the lower base of the upper isosceles trapezoidal hole is connected to the upper long side of the middle rectangular hole, the lower long side of the middle rectangular hole is connected to the upper base of the lower isosceles trapezoidal hole, the lower base of the lower isosceles trapezoidal hole is connected to the upper long side of the lower oblong hole, the length of the upper rectangular hole is equal to the length of the upper base of the upper isosceles trapezoidal hole, the length of the lower base of the upper isosceles trapezoidal hole is greater than the length of the upper base of the upper isosceles trapezoidal hole, the length of the middle rectangular hole is equal to the length of the upper base of the lower isosceles trapezoidal hole, the length of the lower base of the lower isosceles trapezoidal hole is greater than the length of the upper base of the lower isosceles trapezoidal hole, and the length of the lower oblong hole is greater than the length of the lower base of the lower isosceles trapezoidal hole.

6. A slide regulating valve capable of realizing flow characteristics according to claim 3 or 4, characterized in that: The throttling groove of the fixed slide plate matches the throttling groove of the movable slide plate.

7. A slide plate regulating valve capable of realizing flow characteristics according to claim 6, characterized in that: The plurality of fixed plate throttling grooves on the fixed plate have the same shape and different sizes, and the sizes of the fixed plate throttling grooves on the fixed plate are larger in the middle and smaller on both sides; The multiple moving slide throttling grooves on the moving slide have the same shape but different sizes. The size of the moving slide throttling grooves on the moving slide is larger in the middle and smaller on both sides.

Images