Quick-opening type hard sealing regulating valve

Abstract

The invention provides a quick-opening type hard sealing regulating valve, which belongs to the technical field of regulating valves and comprises a valve body, a first metal spiral wound gasket, a valve disc, a throttling sleeve, a valve cover, a packing gland, an electro-hydraulic actuator, packing, a valve rod, a second metal spiral wound gasket and a valve seat. The valve disc and the throttling sleeve are in low-friction design, and the quick-opening flow characteristic is achieved through matching of a special throttling opening. When the opening degree is lower than 50%, the flow is rapidly increased along with the stroke of the valve disc; and the flow is slowly increased. The problems that a traditional adjusting valve is single in flow characteristic and large in friction between the valve disc and the throttling sleeve are solved, the valve has the advantages of being reliable and stable in operation, high in adjusting precision, long in service life and the like, is suitable for various industrial fields, and lays a foundation for localization and batch production of the valve.

Description

Technical Field

[0001] The present invention relates to the technical field of regulating valves, and in particular to a quick-opening hard-sealed regulating valve. Background Art

[0002] Among marine valves, regulating valves are an important type of valve used to adjust parameters such as flow, pressure, and temperature of the medium in the pipeline. Regulating valves are widely used in various industrial fields because of their good regulating performance and stability. However, the flow characteristics of commonly used regulating valves are mostly linear or equal percentage types. In some application scenarios, the regulating valve is required to respond quickly in a short time to achieve the regulation of a larger flow rate, and the traditional flow characteristics cannot meet this requirement. In addition, there is a lot of friction between the valve disc and the sleeve of some traditional sleeve regulating valves, which will not only increase the thrust of the valve, but also may cause wear of the valve disc and the throttling sleeve, affecting the service life and regulation accuracy of the valve. At the same time, the heat generated by friction may also affect the performance and sealing effect of the valve. Summary of the invention

[0003] According to the above-mentioned technical problem that in certain application scenarios, the regulating valve needs to be able to respond quickly in a short time to achieve large flow regulation, a quick-opening hard-sealed regulating valve is provided. The present invention realizes low friction and quick-opening flow characteristics through the structural design of the valve disc and the throttle sleeve, improves the performance and reliability of the regulating valve, and meets the use requirements under special working conditions.

[0004] The technical means adopted by the present invention are as follows:

[0005] A quick-opening hard-sealed regulating valve comprises: a valve body, a first metal spiral wound gasket, a valve disc, a throttling sleeve, a valve cover, a packing gland, an electro-hydraulic actuator, a packing, a valve stem, a second metal spiral wound gasket, and a valve seat:

[0006] The valve disc cooperates with the throttle sleeve to adjust the flow rate. The valve disc does not contain a vent hole. The pressure balance is ensured by the square opening on the throttle sleeve. There is a friction between the valve disc and the throttle sleeve, forming a low friction design between the valve disc and the throttle sleeve.

[0007] The throttling sleeve is provided with a special throttling port for adjusting the flow rate, and the special throttling port includes a small round hole and a square hole; the throttling sleeve is provided with evenly distributed balancing holes parallel to the axial direction, so that the inlet and outlet of the inner cavity of the valve body are connected.

[0008] Furthermore, the packing gland seals the valve disc by pressing the packing tightly with fasteners; the valve cover is fixed to the valve body with fasteners and sealed with a first metal wound gasket.

[0009] Furthermore, the electro-hydraulic actuator gradually lifts the valve disc through a threaded connection, so that the valve disc and the valve seat gradually open from a closed state; the valve disc and the throttling sleeve are adjusted together to make the flow characteristic of the regulating valve a quick-opening type.

[0010] Furthermore, the regulating valve has a straight stroke of 40 mm, and from a closed state to a fully open state, each interval of 4 mm corresponds to a different flow condition.

[0011] Furthermore, the valve disc and the throttling sleeve are made of a wear-resistant metal material with poor hardness, so as to ensure the hard sealing performance and service life of the regulating valve.

[0012] Furthermore, the electro-hydraulic actuator has a high-precision position feedback device, which can accurately control the stroke of the valve disc.

[0013] Due to the adoption of the above technical solution, compared with the prior art, the present invention has the following advantages:

[0014] 1. The quick-opening hard-sealed regulating valve provided by the present invention can rapidly increase the flow rate when the stroke is below 50%, quickly respond to large flow demands, achieve efficient flow regulation, and meet the strict requirements of special working conditions for rapid opening and closing, thereby significantly improving the control efficiency of the system.

[0015] 2. The invention provides a quick-opening hard-sealed regulating valve, which adopts an innovative low-friction design between the valve disc and the throttling sleeve, with only one friction point. This design effectively reduces the friction during valve operation, reduces energy consumption, and greatly reduces the wear of the valve disc and the throttling sleeve, prolongs the service life of the valve, ensures the stability and reliability of the valve during long-term operation, and thus reduces maintenance costs.

[0016] 3. The present invention provides a quick-opening hard-sealed regulating valve, in which the throttling sleeve of the special throttling hole can not only effectively adjust the flow rate, but also has a guiding function to ensure the accuracy and stability of the valve disc during movement, thereby ensuring that the valve can operate stably under various working conditions.

[0017] Based on the above reasons, the present invention can be promoted in the technical field of regulating valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1This is a structural schematic diagram of a quick-opening hard-sealed regulating valve according to the present invention;

[0020] Figure 2 This is a schematic diagram of a low-friction design structure of a quick-opening hard-sealed regulating valve according to the present invention;

[0021] Figure 3 It is a three-dimensional model diagram of a valve disc of a quick-opening hard-sealed regulating valve described in the present invention;

[0022] Figure 4 It is a three-dimensional model diagram of a throttle sleeve of a quick-opening hard-sealed regulating valve described in the present invention;

[0023] Figure 5 This is a flow regulation principle diagram of a quick-opening hard-sealed regulating valve described in the present invention;

[0024] Figure 6 It is a flow characteristic curve diagram of a quick-opening hard-sealed regulating valve described in the present invention;

[0025] Figure 7 It is an overall schematic diagram of a quick-opening hard-sealed regulating valve according to the present invention;

[0026] Figure 8 This is a front view of a quick-opening hard-sealed regulating valve according to the present invention;

[0027] Fig. 9 It is a side view of a quick-opening hard-sealed regulating valve according to the present invention;

[0028] Fig.10 The utility model is a top view of a quick-opening hard-sealed regulating valve described in the present invention.

[0029] In the figure: 1. valve body; 2. first metal wound gasket; 3. valve disc; 4. throttle sleeve; 5. valve cover; 6. packing gland; 7. electro-hydraulic actuator; 8. packing; 9. valve stem; 10. second metal wound gasket; 11. valve seat. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0034] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0035] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0036] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0037] like Figures 1 to 10 As shown, the present invention provides a quick-opening hard-sealed regulating valve, comprising: a valve body 1, a first metal spiral wound gasket 2, a valve disc 3, a throttling sleeve 4, a valve cover 5, a packing gland 6, an electro-hydraulic actuator 7, a packing 8, a valve stem 9, a second metal spiral wound gasket 10, and a valve seat 11:

[0038] The valve disc 3 cooperates with the throttle sleeve 4 to adjust the flow rate. The valve disc 3 does not have a vent hole. The pressure balance is ensured by the square opening on the throttle sleeve 4. There is a friction between the valve disc 3 and the throttle sleeve 4, forming a low friction design between the valve disc 3 and the throttle sleeve 4.

[0039] The throttling sleeve 4 is provided with a special throttling port for adjusting the flow rate, and the special throttling port includes a small round hole and a square hole; the throttling sleeve 4 is provided with evenly distributed balancing holes parallel to the axial direction, so that the inlet and outlet of the inner cavity of the valve body 1 are connected.

[0040] Furthermore, below 50% opening, as the stroke of the valve disc 3 increases, the medium at the inlet end flows out from the small circular hole of the throttling sleeve 4, and at the same time, the valve disc 3 pushes most of the medium in the throttling sleeve 4 to flow out from the square hole of the throttling sleeve 4. At this time, the flow area of ​​the square hole is not affected by the valve disc 3; when the opening reaches more than 50%, as the stroke of the valve disc 3 increases, the medium at the inlet end flows out from the small circular hole of the throttling sleeve 4, and at the same time, the valve disc 3 pushes a small amount of medium in the throttling sleeve 4 to flow out from the square hole of the throttling sleeve 4. At this time, the flow area of ​​the square hole is blocked by the valve disc 3.

[0041] Furthermore, the packing gland 6 seals the valve disc 3 by pressing the packing 8 through fasteners; the valve cover 5 is fixed to the valve body 1 through fasteners and sealed through the first metal spiral wound gasket 2 .

[0042] Furthermore, the electro-hydraulic actuator 7 receives a working instruction and gradually lifts the valve disc 3 through a threaded connection, so that it and the valve seat 11 gradually open from a closed state; the valve disc 3 and the throttle sleeve 4 are adjusted together to make the throttle sleeve 4 regulating valve flow characteristics quick-opening type.

[0043] Furthermore, the regulating valve has a straight stroke of 40 mm, and from the closed state to the fully open state, each interval of 4 mm corresponds to different flow conditions, such as Figure 6 As shown, its flow characteristic curve shows that when the stroke is below 50%, the flow increases rapidly; when the stroke is above 50%, the flow increases slowly.

[0044] Furthermore, the flow coefficient under this working condition is taken at every 4mm interval, as shown in Table 1, and its characteristic curve is shown in Figure 6 ;

[0045] Table 1 Flow coefficient of control valve at 10 working conditions

[0046]

[0047] Furthermore, the valve disc 3 and the throttling sleeve 4 are made of a wear-resistant metal material with poor hardness to ensure the hard sealing performance and service life of the regulating valve.

[0048] Furthermore, the electro-hydraulic actuator 7 has a high-precision position feedback device, which can accurately control the stroke of the valve disc 3.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quick-opening hard-sealed regulating valve, characterized in that: include: Valve body, first metal spiral wound gasket, valve disc, throttle sleeve, valve cover, packing gland, electro-hydraulic actuator, packing, valve stem, second metal spiral wound gasket, valve seat: The valve disc cooperates with the throttle sleeve to adjust the flow rate. The valve disc does not contain a vent hole. The pressure balance is ensured by the square opening on the throttle sleeve. There is a friction between the valve disc and the throttle sleeve, forming a low friction design between the valve disc and the throttle sleeve. The throttling sleeve is provided with a special throttling port for adjusting the flow rate, and the special throttling port includes a small round hole and a square hole; the height of the small round holes distributed on the throttling sleeve is half of the valve stroke, and the square holes on the throttling sleeve are evenly distributed parallel to the axial direction, which play the role of adjusting the flow rate and balancing the pressure, so that the valve seat can move freely.

2. A quick-opening hard-sealed regulating valve according to claim 1, characterized in that: The packing gland seals the valve disc by pressing the packing tightly through fasteners; the valve cover is fixed to the valve body through fasteners and sealed through a first metal spiral wound gasket.

3. A quick-opening hard-sealed regulating valve according to claim 1, characterized in that: The electro-hydraulic actuator gradually lifts the valve disc through a threaded connection, so that it and the valve seat gradually open from a closed state; the valve disc and the throttling sleeve are adjusted together to make the flow characteristic of the regulating valve a quick-opening type.

4. A quick-opening hard-sealed regulating valve according to claim 1, characterized in that: The regulating valve has a straight stroke of 40 mm, and from a closed state to a fully open state, each interval of 4 mm corresponds to a different flow condition.

5. The quick-opening hard-sealed regulating valve according to claim 1, characterized in that: The valve disc and the valve seat are made of wear-resistant metal material with poor hardness to ensure the hard sealing performance and service life of the regulating valve.

6. A quick-opening hard-sealed regulating valve according to claim 3, characterized in that: The electro-hydraulic actuator has a high-precision position feedback device and can accurately control the stroke of the valve disc.

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