Special valve for mechanical hard sealing black water and grey water

Abstract

The utility model relates to a mechanical hard sealing valve special for black water and grey water. The valve comprises a valve body and a valve ball, the valve body is provided with a valve cavity and a valve body channel communicated with the valve cavity, the valve body channel is provided with a medium inlet and a medium outlet, and the valve ball is rotationally installed in the valve cavity through a ball shaft and used for opening and blocking the valve body channel. The upper end of the valve ball is rotationally installed on the valve body through an upper ball shaft, the lower end of the valve ball is rotationally installed on the valve body through a lower ball shaft, an upper sealing structure is arranged between the upper ball shaft and the valve body, and a lower sealing structure is arranged between the lower ball shaft and the valve body. Sealing structures are arranged between the upper ball shaft and the valve body and between the lower ball shaft and the valve body, so that black water and grey water can be prevented from entering the space between the ball shafts and the valve body, and impurities and easily-coked substances are prevented from entering the space between the ball shafts and the valve body. When the ball valve with the structure is used for conveying black water and grey water, impurities and substances which are easy to coke and scale in the black water and grey water do not influence subsequent normal rotation of the ball shaft, so that the service life of the ball valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the valve field, concretely relates to mechanical hard sealing black water ash water special valve. BACKGROUND

[0002] In the field of coal chemical industry, ash water and black water are two key by-products, which play an important role in coal gasification process, especially in entrained-flow high-pressure pulverized coal gasification technology. The generation and treatment of these two kinds of water are crucial to the sustainability of the process. Black water mainly comes from quenching chamber, carbon washing tower and slag pool, etc. Due to direct contact with high-temperature coal gas, the water discharged from these places contains a large amount of fine ash and impurities as well as substances prone to coking, so it has a high turbidity and is named black water. The turbidity of this water is a direct manifestation of its high ash and impurity content. Black water is not directly discharged, but needs to go through a series of treatment steps to remove pollutants, so as to meet the standard of recycling. When the water goes through these treatments, its turbidity decreases significantly, and at this time it is called ash water. These ash water, after further treatment, can remove most of the impurities and become clear, so it can safely re-enter the production system and realize the recycling of water, which not only improves the efficiency of resource use, but also reduces environmental pollution. Therefore, ash water and black water in coal chemical industry are not only by-products, but also important water resources. Their treatment and reuse reflect the comprehensive consideration of chemical technology in environmental protection and economic development.

[0003] However, there are a lot of substances prone to coking and scaling in ash water. The most commonly used valve for transporting black water and ash water is a ball valve. The ball valve generally includes a valve body and a valve ball. The valve body has a valve cavity and a valve body passage communicating with the valve cavity. The valve body passage has a medium inlet and a medium outlet. The valve ball is rotatably installed in the valve cavity through a ball shaft (valve rod) for opening and blocking the valve body passage. However, black water and ash water contain a large amount of solid impurities and substances prone to coking and scaling, which can easily enter between the ball shaft and the valve body, thereby affecting the normal operation of the subsequent ball shaft. SUMMARY

[0004] The utility model aims at providing a mechanical hard sealing black water ash water special valve to solve the above technical problems existing in the prior art.

[0005] In order to realize the above-mentioned purpose, the mechanical hard sealing black water and grey water special valve adopts the following technical scheme: the mechanical hard sealing black water and grey water special valve comprises a valve body and a valve ball, the valve body has a valve cavity and a valve body channel communicated with the valve cavity, the valve body channel has a medium inlet and a medium outlet, the valve ball is rotatably installed in the valve cavity through a ball shaft and is used for opening and blocking the valve body channel, the upper end of the valve ball is rotatably installed on the valve body through an upper ball shaft, the lower end of the valve ball is rotatably installed on the valve body through a lower ball shaft, an upper sealing structure is arranged between the upper ball shaft and the valve body, and a lower sealing structure is arranged between the lower ball shaft and the valve body.

[0006] Each sealing structure comprises a boss arranged on the inner wall of the valve cavity, the boss is provided with a mounting hole for rotatably mounting the corresponding ball shaft, the upper end and the lower end of the ball valve are provided with a mounting plane corresponding to the corresponding boss, and a sealing ring structure is arranged between each mounting plane and the top surface of the corresponding boss.

[0007] The boss is provided with a sealing groove, the corresponding mounting plane is provided with a mounting step, the sealing ring structure comprises a first sealing ring arranged in the sealing groove and a second sealing ring sleeved on the mounting step, and the first sealing ring and the second sealing ring are in sealing cooperation.

[0008] An elastic member is arranged between the step surface of the mounting step and the second sealing ring, and a corrugated pipe for sealing the elastic member is arranged between the second sealing ring and the valve ball.

[0009] Corresponding end portions of the valve ball are further provided with annular mounting plates, one end of the corrugated pipe is connected to the second sealing ring, and the other end of the corrugated pipe is connected to the annular mounting plate.

[0010] The boss is provided with a first sealing groove, the mounting plane is provided with a second sealing groove corresponding to the first sealing groove, the sealing ring structure comprises a first sealing ring arranged in the first sealing groove and a second sealing ring arranged in the second sealing groove, and the first sealing ring and the second sealing ring are in sealing cooperation.

[0011] An elastic member is arranged between the groove bottom of the second sealing groove and the second sealing ring.

[0012] The first sealing ring and the second sealing ring are both metal sealing rings.

[0013] The upper ball shaft, the lower ball shaft and the valve ball are integrally formed.

[0014] The valve body comprises a lower valve body and an upper valve cover, the lower valve body is provided with a mounting hole with an opening upward for accommodating the valve ball, and the upper valve cover is provided with the corresponding boss.

[0015] The utility model discloses a beneficial effect: the upper ball shaft and valve body between and the lower ball shaft and valve body between all are provided with sealing structure, can avoid black water ash water into the ball shaft and valve body between, also avoided the impurity and easy coking, easy scale the material into the ball shaft and valve body between. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic diagram of the embodiment one of the mechanical hard sealing black water ash water special valve of the utility model;

[0017] Figure 2 It is Figure 1 It is the partial close -up of place A in the structure schematic diagram of the embodiment one of the mechanical hard sealing black water ash water special valve of the utility model;

[0018] Figure 3 It is Figure 1 It is the partial close -up of place B in the structure schematic diagram of the embodiment one of the mechanical hard sealing black water ash water special valve of the utility model;

[0019] Figure 4 It is the structure schematic diagram of the embodiment two of the mechanical hard sealing black water ash water special valve of the utility model;

[0020] Figure 5 It is Figure 4 It is the partial close -up of place C in the structure schematic diagram of the embodiment two of the mechanical hard sealing black water ash water special valve of the utility model;

[0021] Figure 6 It is Figure 4 It is the partial close -up of place D in the structure schematic diagram of the embodiment two of the mechanical hard sealing black water ash water special valve of the utility model. DETAILED DESCRIPTION

[0022] In order to facilitate understanding the utility model, below combining with the drawing and specific embodiment, the utility model is explained in more detail. The drawing has shown the preferred embodiment of the utility model. However, the utility model can be realized in many different forms, and is not limited to the embodiment described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive.

[0023] It should be noted that, unless otherwise defined, the technical and scientific terms used in this specification are the same as the meanings understood by the person skilled in the art belonging to the technical field of the utility model. The technical and scientific terms used in the specification of the utility model are only for the purpose of describing specific embodiments, and are not used to limit the utility model.

[0024] The embodiment one of the mechanical hard sealing black water ash water special valve of the utility model, as Figures 1-3As shown, including valve body 1, valve ball 2, valve stem 3 and valve stem drive mechanism 4, valve body 1 has valve cavity 5 and valve body passage 6 communicating with the valve cavity, valve body passage 6 has medium inlet 7 and medium outlet 8, valve ball 2 is rotatably mounted in the valve cavity through the ball shaft, for opening and blocking the valve body passage. Wherein the upper end of the valve ball 2 is rotatably mounted on the valve body through the upper ball shaft 9, the valve stem 3 is in transmission connection with the upper ball shaft 9, realizing the rotation of the valve stem driving the upper ball shaft and then driving the valve ball. The lower end of the valve ball is rotatably mounted on the valve body through the lower ball shaft 10. The above structure belongs to the prior art, and the structure of the embodiment will not be described in detail. In this embodiment, the upper ball shaft and the valve body are provided with upper sealing structure 16, and the lower ball shaft and the valve body are provided with lower sealing structure 13.

[0025] In this embodiment, the upper sealing structure 16 and the lower sealing structure 17 have the same structure, and the upper sealing structure and the lower sealing structure will be described in detail. As shown in Figure 1 The upper sealing structure 16 includes an upper boss 14 arranged on the inner wall of the valve cavity, and the upper boss 14 is provided with an upper mounting hole for rotatably mounting the upper ball shaft 9. The upper end of the valve ball has an upper mounting plane 15, and the upper mounting plane and the surface of the upper boss are provided with an upper sealing ring structure. As shown in Figure 2 The upper boss 14 is provided with a first upper sealing groove 17, and the upper mounting plane 15 is provided with a second upper sealing groove 18, and the upper sealing ring structure includes a first upper sealing ring 19 arranged in the first upper sealing groove 17 and a second upper sealing ring 20 arranged in the second upper sealing groove 18. The second upper sealing groove 18 is provided with an upper elastic member 21 between the groove bottom and the second upper sealing ring 20. As shown in Figure 1 The lower sealing structure includes a lower boss 12 arranged on the inner wall of the valve cavity, and the lower boss is provided with a lower mounting hole for rotatably mounting the lower ball shaft 10. The lower end of the valve ball has a lower mounting plane 11, and the lower mounting plane and the surface of the lower boss are provided with a lower sealing ring structure. As shown in Figure 3 The lower boss 12 is provided with a first lower sealing groove 23, and the lower mounting plane 11 is provided with a second lower sealing groove 22, and the lower sealing ring structure includes a first lower sealing ring 25 arranged in the first lower sealing groove 23 and a second lower sealing ring 24 arranged in the second lower sealing groove 22. The second lower sealing groove 22 is provided with a lower elastic member 26 between the groove bottom and the second lower sealing ring 24.

[0026] The upper and lower elastic members are both wave springs. Moreover, each sealing ring is a metal sealing ring, which realizes the sealing between the ball shaft and the valve body in the form of mechanical hard sealing. The upper ball shaft 9, the lower ball shaft 10 and the valve ball 2 are integrally formed, which can be formed by casting, welding or forging. In order to facilitate the installation of the valve ball, the valve body includes a lower valve body 1A and an upper valve cover 1B in this embodiment, which are sealingly connected by bolts, the lower valve body 1A has an installation hole with an opening upward for the valve ball 2 to be installed, and the upper boss 14 is arranged on the upper valve cover 1B.

[0027] The embodiment two of the mechanical hard sealing black water and grey water special valve of the utility model, as shown in Figures 4-6 The difference between the embodiment one and the embodiment two is that the specific structure of the upper sealing structure and the lower sealing structure in the embodiment two is different from the specific structure of the upper sealing structure and the lower sealing structure in the embodiment one. In the embodiment two, the upper sealing structure and the lower sealing structure are the same, and specifically as follows: as shown in Figure 5 The upper boss is provided with an upper sealing groove 27, and the upper installation plane is provided with an upper installation step 28. The upper sealing ring structure comprises a first upper sealing ring 29 arranged in the upper sealing groove 27 and a second upper sealing ring 30 sleeved on the upper installation step 28, and the first upper sealing ring 29 and the second upper sealing ring 30 are sealingly matched. An upper elastic member 31 is arranged between the step surface of the upper installation step 28 and the second upper sealing ring 30, and the second upper sealing ring 30 is provided with an upper corrugated pipe 32 for sealing the lower elastic member 31 between the valve balls. The upper end of the valve ball is further provided with an upper annular installation plate 33, and the upper end of the upper corrugated pipe 32 is connected to the second upper sealing ring 30, and the lower end is connected to the upper annular installation plate 33. The upper elastic member adopts a corrugated spring. Similarly, as shown in Figure 6 The lower boss is provided with a lower sealing groove 34, and the lower installation plane is provided with a lower installation step 35. The lower sealing ring structure further comprises a first lower sealing ring 36 arranged in the lower sealing groove 34 and a second lower sealing ring 37 sleeved on the lower installation step 35, and the first lower sealing ring 36 and the second lower sealing ring 37 are sealingly matched. A lower elastic member 40 is arranged between the step surface of the lower installation step 35 and the second lower sealing ring 37, and the second lower sealing ring 37 is provided with a lower corrugated pipe 39 for sealing the lower elastic member 40 between the valve balls. The upper end of the valve ball is further provided with a lower annular installation plate 38, and the lower end of the lower corrugated pipe 39 is connected to the second lower sealing ring 37, and the upper end is connected to the lower annular installation plate 38. The lower elastic member also adopts a corrugated spring.

[0028] In the above description of the present application, unless otherwise specified and limited, the terms "fixed", "mounted", "connected" or "connected" and the like should be understood in a broad sense. For example, as for the term "connected", it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. Therefore, unless otherwise specified in the present application, those skilled in the art can understand the specific meaning of the above terms in the utility model according to the specific circumstances.

[0029] According to the above description of the present specification, those skilled in the art can also understand that the terms used such as "upper", "lower", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "transverse", "clockwise" or "counterclockwise" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of the present specification, which are only for the purpose of facilitating the description of the present application and simplifying the description, and are not explicitly or implicitly indicated The device or element involved must have the specified orientation, be constructed and operated in a particular orientation, therefore the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the present application.

[0030] In addition, the terms "first" or "second" and the like used in the present specification are terms used to refer to numbers or ordinal numbers only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" or "second" can explicitly or implicitly include at least one of the features. In the description of the present specification, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise specifically limited.

[0031] In other embodiments of the present application, the elastic member can also be a butterfly spring; the elastic member can also be an elastic washer of other structures; under the premise of ensuring the sealing effect, each sealing ring can also be a sealing ring made of materials other than metal; The annular mounting plate can also not be provided on the valve ball, at which time the corresponding end of the bellows is directly connected to the valve ball.

Claims

1. A mechanically hard-seal valve specifically for black and grey water, comprising a valve body and a valve ball, the valve body having a valve cavity and a valve body channel communicating with the valve cavity, the valve body channel having a medium inlet and a medium outlet, the valve ball being rotatably mounted in the valve cavity via a ball shaft, used for opening and sealing the valve body channel, characterized in that: The upper end of the valve ball is rotatably mounted on the valve body via an upper ball shaft, and the lower end of the valve ball is rotatably mounted on the valve body via a lower ball shaft. An upper sealing structure is provided between the upper ball shaft and the valve body, and a lower sealing structure is provided between the lower ball shaft and the valve body.

2. The mechanically hard-seal valve for black and grey water as described in claim 1, characterized in that: Each sealing structure includes a boss on the inner wall of the valve cavity, with mounting holes on the boss for the corresponding ball shaft to be rotatably installed; the upper and lower ends of the ball valve have mounting planes corresponding to the bosses, and a sealing ring structure is provided between each mounting plane and the platform of the corresponding boss.

3. The mechanically hard-seal valve for black and grey water as described in claim 2, characterized in that: A sealing groove is provided on the boss, and an installation step is provided on the corresponding installation plane. The sealing ring structure includes a first sealing ring disposed in the sealing groove and a second sealing ring fitted on the installation step. The first sealing ring and the second sealing ring are sealed together.

4. The mechanically hard-seal valve for black and grey water as described in claim 3, characterized in that: An elastic element is provided on the mounting step between its step surface and the second sealing ring, and a bellows for sealing the elastic element is provided between the second sealing ring and the valve ball.

5. The mechanically hard-seal valve for black and grey water as described in claim 4, characterized in that: The valve ball is also provided with an annular mounting plate at the corresponding end, and one end of the bellows is connected to the second sealing ring and the other end is connected to the annular mounting plate.

6. The mechanically hard-seal valve for black and grey water as described in claim 2, characterized in that: The boss is provided with a first sealing groove, and the mounting plane is provided with a second sealing groove corresponding to the first sealing groove. The sealing ring structure includes a first sealing ring disposed in the first sealing groove and a second sealing ring disposed in the second sealing groove. The first sealing ring and the second sealing ring are sealed together.

7. The mechanically hard-seal valve for black and grey water as described in claim 6, characterized in that: An elastic element is provided in the second sealing groove between the bottom of the groove and the second sealing ring.

8. The mechanically hard-seal black water / grey water special valve according to claim 3 or 6, characterized in that: Both the first and second sealing rings are made of metal.

9. The mechanically hard-seal valve for black and grey water as described in claim 1, characterized in that: The upper ball shaft, lower ball shaft and valve ball are integrally formed.

10. The mechanically hard-seal valve for black and grey water as described in claim 1, characterized in that: The valve body includes a lower valve body and an upper valve cover. The lower valve body has an upward-opening mounting hole for inserting a valve ball, and the upper valve cover has a corresponding boss.

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