阅读说明：本技术 一种用于太阳能光热发电的闸阀 (Gate valve for solar photo-thermal power generation ) 是由 王栋 兰振 吴玉清 王罗泽 朱博恩 于 2020-05-28 设计创作，主要内容包括：本发明涉及一种用于太阳能光热发电的闸阀,包括：阀盖,阀盖底部形成有平顶阀腔；阀体,阀体底部通道中设置有阀座,其顶部形成有凹形阀腔；凹形阀腔与平顶阀腔高度之和等于太阳能发电阀门直径；阀盖和阀体接触面均为法兰面,且通过螺栓连接；以及阀杆,阀杆底部连接有闸板,其顶部经凹形阀腔、平顶阀腔伸出阀盖与外部驱动机构连接,且带动闸板与阀座抵接或分离,以开启或关闭太阳能发电阀门。本发明公开提供了一种用于太阳能光热发电的闸阀,将阀盖内的阀腔由拱形减小至平顶结构,通过增加阀体处的阀腔高度(即增加了阀体和阀盖法兰连接处的高度)满足闸板完全开启,由此将阀门整体重心降低,增加了阀门的稳定性；同时提高了阀门的密封性。(The invention relates to a gate valve for solar photo-thermal power generation, which comprises: the valve cover is provided with a flat-top valve cavity at the bottom; the valve body is provided with a valve seat in a channel at the bottom of the valve body, and a concave valve cavity is formed at the top of the valve body; the sum of the heights of the concave valve cavity and the flat-top valve cavity is equal to the diameter of the solar power generation valve; the valve cover and the valve body contact surface are both flange surfaces and are connected through bolts; and the bottom of the valve rod is connected with a flashboard, the top of the flashboard extends out of the valve cover through the concave valve cavity and the flat-top valve cavity to be connected with an external driving mechanism, and the flashboard is driven to be abutted against or separated from the valve seat so as to open or close the solar power generation valve. The invention discloses a gate valve for solar photo-thermal power generation, wherein a valve cavity in a valve cover is reduced to a flat-top structure from an arch shape, and the height of the valve cavity at the valve body (namely the height of the joint of the valve body and a flange of the valve cover) is increased to meet the requirement that a gate plate is completely opened, so that the integral gravity center of the valve is reduced, and the stability of the valve is improved; meanwhile, the sealing performance of the valve is improved.)

1. A gate valve for solar photo-thermal power generation, comprising:

the valve cover (100), a flat-top valve cavity (101) is formed at the bottom of the valve cover (100);

the valve comprises a valve body (200), wherein a valve seat (300) is arranged in a channel at the bottom of the valve body (200), and a concave valve cavity (201) is formed at the top of the valve body; the sum of the heights of the concave valve cavity (201) and the flat-top valve cavity (101) is equal to the diameter of the solar power generation valve; the contact surfaces of the valve cover (100) and the valve body (200) are flange surfaces and are connected through bolts;

and the valve rod (400), the bottom of the valve rod (400) is connected with the gate plate (500), the top of the gate plate (400) extends out of the concave valve cavity (201) and the flat-top valve cavity (101), the valve cover (100) is connected with an external driving mechanism, and the gate plate (500) is connected with or separated from the valve seat (300) in an abutting mode so as to open or close the solar power generation valve.

2. The gate valve for solar photo-thermal power generation according to claim 1, wherein the valve cover (100) is a cylindrical structure, a filler cavity (102) is formed in the middle of the top end of the valve cover, and the bottom end of the filler cavity is spaced from the flat-topped valve cavity (101) by a distance L; the packing cavity is provided with a packing pad (102) at the bottom, and the packing pad is filled with packing (103) to form a first sealing structure between the outer wall of the valve rod (400) and the top end of the valve cover (100).

3. The gate valve for solar photo-thermal power generation of claim 1, wherein a sealing groove is correspondingly arranged on the contact surface of the valve cover (100) and the valve body (200) and close to the bolt, and an annular sealing gasket (600) is arranged in the sealing groove to form a second sealing structure at the middle opening of the solar power generation valve.

4. The gate valve for solar photo-thermal power generation according to claim 3, wherein the annular sealing gasket (600) is made of the same material as the valve cover (100) and the valve body (200).

5. The gate valve for solar photothermal power according to claim 4, wherein said annular sealing gasket (600) is made of 347H.

Technical Field

The invention relates to the technical field of solar photo-thermal power generation, in particular to a gate valve for solar photo-thermal power generation.

Background

With the increasing of the generated energy of a solar photo-thermal power generation project, the aperture of the valve is also increased continuously, at present, the domestic solar power generation valve generally adopts a stop valve type, referring to the attached figure 2, when the valve is fully opened, the valve cover 100 needs to be designed into an arch bridge shape, and the gate valve can be fully opened; however, when the aperture of the valve is DN150 or more, if a stop valve type is still adopted, the stability of the whole valve cannot be ensured because the overall height of the valve is increased and the center of gravity is too high, and therefore, how to provide a gate valve for solar photo-thermal power generation with good stability is a problem that needs to be solved by those skilled in the art.

Disclosure of Invention

Therefore, the invention aims to provide a gate valve for solar photo-thermal power generation, and solves the problem that the stability of the gate valve is poor due to the fact that the gravity center of the existing stop valve structure is higher.

The invention provides a gate valve for solar photo-thermal power generation, which comprises:

the valve cover is provided with a flat-top valve cavity at the bottom;

the valve body is provided with a valve seat in a channel at the bottom of the valve body, and a concave valve cavity is formed at the top of the valve body; the sum of the heights of the concave valve cavity and the flat-top valve cavity is equal to the diameter of the solar power generation valve; the valve cover and the valve body contact surface are both flange surfaces and are connected through bolts;

and the bottom of the valve rod is connected with a flashboard, the top of the flashboard extends out of the valve cover through the concave valve cavity and the flat-top valve cavity to be connected with an external driving mechanism, and the flashboard is driven to be abutted against or separated from the valve seat so as to open or close the solar power generation valve.

According to the technical scheme, compared with the prior art, the gate valve for solar photo-thermal power generation is characterized in that the valve cavity in the valve cover is reduced to a flat-top structure from an arch shape, the gate plate is completely opened by increasing the height of the valve cavity at the valve body (namely, the height of the joint of the valve body and the flange of the valve cover is increased), the integral gravity center of the valve is lowered, and the stability of the valve is improved.

Furthermore, the valve cover is of a cylindrical structure, a filler cavity is formed in the middle of the top end of the valve cover, and the distance from the bottom end of the filler cavity to the flat-top valve cavity is L; the packing chamber bottom is provided with the packing pad, and its inside packing forms the first seal structure on valve rod outer wall and valve gap top after filling. Because the flat-top valve cavity is arranged at the bottom of the valve cover, the distance between the filler cavity and the flat-top valve cavity is increased, and the situation that the sealing performance of the first sealing structure is reduced due to the fact that a medium (molten salt) and the filler (graphene) react at high temperature of the gate valve is prevented.

Further, on valve gap and the valve body contact surface, and be close to the bolt position and all correspond and be provided with the seal groove, install annular sealing gasket in the seal groove to form the second seal structure of solar energy power generation valve centre of mouth department. Through the arrangement of the annular sealing gasket, the width of the sealing belt is increased, and the sealing performance of the second sealing structure is further ensured.

Furthermore, the annular sealing gasket, the valve cover and the valve body are made of the same material. Therefore, the three expansion coefficients are the same, and the sealing performance is prevented from being damaged by the gap generated by expansion with heat and contraction with cold.

Further, the annular seal is made of 347H. The 347H stainless steel has good high-temperature strength and high-temperature plasticity, excellent oxidation resistance and corrosion resistance, good tissue stability, uniform chemical components and good processability, so that the 347H stainless steel is convenient to process and is suitable for being used in complex environments.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a sectional view of a gate valve for solar photo-thermal power generation provided by the invention (the broken line in the figure shows the position of the bottom of a valve rod with a fully opened gate plate);

FIG. 2 is a schematic diagram of a shut-off valve according to the prior art;

in the figure: 100-valve cover, 101-flat-top valve cavity, 102-packing cavity, 103-packing, 200-valve body, 201-concave valve cavity, 300-valve seat, 400-valve rod, 500-gate plate, 600-annular sealing gasket, distance from L-packing cavity bottom to flat-top valve cavity, and distance from L1-prior art stop valve packing bottom to valve cover arch cavity.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, the present invention provides a gate valve for solar photo-thermal power generation, comprising:

the valve cover 100, the bottom of the valve cover 100 is formed with a flat-top valve cavity 101;

the valve comprises a valve body 200, wherein a valve seat 300 is arranged in a channel at the bottom of the valve body 200, and a concave valve cavity 201 is formed at the top of the valve body; the sum of the heights of the concave valve cavity 201 and the flat-top valve cavity 101 is equal to the diameter of the solar power generation valve; the contact surfaces of the valve cover 100 and the valve body 200 are flange surfaces and are connected through bolts;

and the valve rod 400, the bottom of the valve rod 400 is connected with the gate plate 500, the top of the valve rod 400 extends out of the valve cover 100 through the concave valve cavity 201 and the flat-top valve cavity 101 to be connected with an external driving mechanism, and the gate plate 500 is driven to abut against or separate from the valve seat 300 so as to open or close the solar power generation valve.

The invention discloses a gate valve for solar photo-thermal power generation, wherein a valve cavity in a valve cover is reduced to a flat-top structure from an arch shape, and the height of the valve cavity at the valve body (namely the height of the joint of the valve body and a flange of the valve cover) is increased to meet the requirement that a gate plate is completely opened, so that the integral gravity center of the valve is reduced, and the stability of the valve is improved.

In one embodiment of the present invention, the valve cover 100 is a cylindrical structure, and the middle of the top end thereof is provided with a packing cavity 102, and the bottom end of the packing cavity is spaced from the flat-top valve cavity 101 by a distance L; the packing pad 102 is arranged at the bottom of the packing cavity, and the packing 103 is filled in the packing pad 102 to form a first sealing structure between the outer wall of the valve rod 400 and the top end of the valve cover 100. Wherein, the valve cover is a square column, a cylinder or other column shapes.

Because the service condition of the solar photo-thermal power generation gate valve is 565-585 ℃, a medium (molten salt) reacts with the graphite filler at high temperature, referring to the attached drawing 2, the distance from the bottom of the filler to the arched cavity of the valve cover is L1, and the sealing performance of the valve filler cannot be ensured due to the close distance; referring to the attached drawing 1, the valve body and the valve cover are structurally improved, so that the distance from the bottom end of the filler cavity to the flat-top valve cavity is L, the distance between the bottom end of the filler cavity and the flat-top valve cavity is prolonged, the temperature of the bottom end of the filler is reduced (not more than 350 ℃), and the situation that the sealing performance of a first sealing structure is reduced due to the fact that a medium (molten salt) and the filler (graphene) react at high temperature of the gate valve is avoided.

In another embodiment of the invention, the positions of the contact surfaces of the valve cover 100 and the valve body 200, which are close to the bolts, are respectively provided with a sealing groove, and an annular sealing gasket 600 is installed in the sealing groove to form a second sealing structure at the middle opening of the solar power generation valve. Through the arrangement of the annular sealing gasket, the width of the sealing belt is increased, and the sealing performance of the second sealing structure is further ensured.

Advantageously, the annular seal 600 is made of the same material as the bonnet 100 and the valve body 200. Therefore, the three expansion coefficients are the same, and the sealing performance is prevented from being damaged by the gap generated by expansion with heat and contraction with cold.

More advantageously, the annular seal 600 is made of 347H. The 347H stainless steel has good high-temperature strength and high-temperature plasticity, excellent oxidation resistance and corrosion resistance, good tissue stability, uniform chemical components and good processability, so that the 347H stainless steel is convenient to process and is suitable for being used in complex environments.

Because the using working condition of the solar photo-thermal power generation gate valve is 565-585 ℃, and the medium is molten salt, referring to the attached drawing 2, in the prior art, the gasket at the middle opening of the valve adopts a flexible graphite composite flat gasket or a 316 mica-sandwiched gasket, so that the sealing effect is poor, and the sealing performance of the middle opening of the valve is improved by adopting a 347H annular sealing gasket.

The invention drives the valve rod and the flashboard to move from bottom to top through the external driving mechanism, thereby achieving the purpose of opening the valve, and also drives the valve rod and the flashboard to move from top to bottom through the driving mechanism, thereby achieving the purpose of closing the valve.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.