Special valve for mechanical hard sealing black water and grey water

Abstract

The invention 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 invention relates to the field of valves, and in particular to a mechanical hard-sealed special valve for black water and grey water. Background Art

[0002] In the field of coal chemical industry, grey water and black water are two key by-products, which play an important role in the coal gasification process, especially in the entrained-bed high-pressure pulverized coal gasification technology. The generation and treatment of these two types of water are crucial to the sustainability of the process. Black water mainly comes from the quench chamber, carbon washing tower and slag pool. Due to the direct contact with the high-temperature coal gas, the discharged water contains a large amount of fine ash and impurities and substances that are easy to coke, so it has a high turbidity, which is why it is called black water. The turbidity of this water is a direct reflection of the large amount of ash and impurities it contains. Black water is not discharged directly, but needs to go through a series of treatment steps to remove the pollutants in it so as to meet the standards for recycling. After these treatments, the turbidity of the water drops significantly, and it is called grey water. After further treatment, most of the impurities can be removed from these grey waters, making them clear and safe to re-enter the production system to achieve water recycling, which not only improves the efficiency of resource utilization, but also reduces environmental pollution. Therefore, grey water and black water are not only by-products in coal chemical industry, 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 that are easy to coke and scale in the grey water. The most commonly used valve on the pipelines that transport black water and grey water is the 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 channel connected to the valve cavity. The valve body channel has a medium inlet and a medium outlet. The valve ball is installed in the valve cavity through the ball shaft (valve stem) to open and block the valve body channel. However, black water and grey water contain a lot of solid impurities and substances that are easy to coke and scale, which can easily enter between the ball shaft and the valve body, thereby affecting the normal operation of the subsequent ball shaft. Summary of the invention

[0004] The purpose of the present invention is to provide a mechanical hard-sealed black water and grey water dedicated valve to solve the above-mentioned technical problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, a mechanical hard-sealed black water and gray water special valve of the present invention adopts the following technical scheme: a mechanical hard-sealed black water and gray water special valve, comprising a valve body and a valve ball, the valve body having a valve cavity and a valve body channel connected to the valve cavity, the valve body channel having a medium inlet and a medium outlet, the valve ball being rotatably installed in the valve cavity by a ball shaft, and being used to open and block the valve body channel, the upper end of the valve ball being rotatably installed on the valve body by an upper ball shaft, the lower end of the valve ball being rotatably installed on the valve body by a lower ball shaft, an upper sealing structure being arranged between the upper ball shaft and the valve body, and a lower sealing structure being arranged between the lower ball shaft and the valve body.

[0006] Each sealing structure includes a boss arranged on the inner wall of the valve cavity, and the boss is provided with a mounting hole for the corresponding ball shaft to be rotatably installed; the upper and lower ends of the ball valve have mounting planes corresponding to the corresponding bosses, and a sealing ring structure is provided between each mounting plane and the table surface of the corresponding boss.

[0007] The boss is provided with a sealing groove, and 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. The first sealing ring and the second sealing ring are sealingly matched.

[0008] An elastic member is arranged on the installation step between the step surface and the second sealing ring, and a bellows for sealing the elastic member is arranged between the second sealing ring and the valve ball.

[0009] An annular mounting plate is also provided at the corresponding end of the valve ball. One end of the bellows is connected to the second sealing ring, and the other end is connected to the annular mounting plate.

[0010] A first sealing groove is arranged on the boss, a second sealing groove corresponding to the first sealing groove is arranged on the mounting plane, 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 sealed in cooperation.

[0011] An elastic member is arranged in the second sealing groove between the groove bottom 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 opening upward for inserting a valve ball, and the upper valve cover is provided with a corresponding boss.

[0015] Beneficial effects of the present invention: A sealing structure is provided between the upper ball shaft and the valve body and between the lower ball shaft and the valve body, which can prevent black water and gray water from entering between the ball shaft and the valve body, and also prevent impurities and substances that are prone to coking and scaling from entering between the ball shaft and the valve body. When the ball valve of the above structure is conveying black water and gray water, impurities and substances that are prone to coking and scaling in the black and gray water will not affect the subsequent normal rotation of the ball shaft, thereby extending the service life of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a first embodiment of a mechanical hard-sealed black water and grey water dedicated valve of the present invention;

[0017] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0018] Figure 3 yes Figure 1 A partial enlarged view of point B in the middle;

[0019] Figure 4 It is a structural schematic diagram of a second embodiment of a mechanical hard-sealed black water and grey water dedicated valve of the present invention;

[0020] Figure 5 yes Figure 4 A partial enlarged view of point C in the middle;

[0021] Figure 6 yes Figure 4 A partial enlarged view of point D in the middle. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that, unless otherwise defined, the technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0024] Embodiment 1 of a mechanical hard-sealed black water and grey water dedicated valve of the present invention, as Figure 1-Figure 3As shown, it includes a valve body 1, a valve ball 2, a valve stem 3 and a valve stem driving mechanism 4. The valve body 1 has a valve cavity 5 and a valve body channel 6 connected to the valve cavity. The valve body channel 6 has a medium inlet 7 and a medium outlet 8. The valve ball 2 is rotatably installed in the valve cavity through a ball shaft, and is used to open and block the valve body channel. The upper end of the valve ball 2 is rotatably installed on the valve body through an upper ball shaft 9. The valve stem 3 is transmission-connected with the upper ball shaft 9, so that the valve stem drives the upper ball shaft to rotate and then drives the valve ball to rotate. The lower end of the valve ball is rotatably installed on the valve body through a lower ball shaft 10. The above structures all belong to the prior art, and their structures are not described in detail in this embodiment. In this embodiment, an upper sealing structure 16 is provided between the upper ball shaft and the valve body, and a lower sealing structure 13 is provided between the lower ball shaft and the valve body.

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

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

[0027] Embodiment 2 of a mechanical hard-sealed black water and grey water dedicated valve of the present invention, as shown in FIG. Figure 4-Figure 6 As shown, the difference from the first embodiment is that the specific structures of the upper sealing structure and the lower sealing structure in this embodiment are different from the specific structures of the upper and lower sealing structures in the first embodiment. In this embodiment, the structures of the upper sealing structure and the lower sealing structure are the same, specifically as follows: Figure 5 As shown, an upper sealing groove 27 is provided on the upper boss, an upper mounting step 28 is provided on the upper mounting plane, and the upper sealing ring structure includes a first upper sealing ring 29 provided in the upper sealing groove 27 and a second upper sealing ring 30 sleeved on the upper mounting step 28, and the first upper sealing ring 29 and the second upper sealing ring 30 are sealed together. An upper elastic member 31 is provided on the upper mounting step 28 between its step surface and the second upper sealing ring 30, and an upper bellows 32 for sealing the lower elastic member 31 is provided between the second upper sealing ring 30 and the valve ball. An upper annular mounting plate 33 is also provided at the upper end of the valve ball, and the upper end of the upper bellows 32 is connected to the second upper sealing ring 30, and the lower end is connected to the upper annular mounting plate 33. The upper elastic member adopts a corrugated spring. Similarly, as shown in Figure 6 As shown, a lower sealing groove 34 is provided on the lower boss, a lower mounting step 35 is provided on the lower mounting plane, and the lower sealing ring structure also includes a first lower sealing ring 36 provided in the lower sealing groove 34 and a second lower sealing ring 37 sleeved on the lower mounting step 35, and the first lower sealing ring 36 and the second lower sealing ring 37 are sealed and matched. A lower elastic member 40 is provided on the lower mounting step 35 between its step surface and the second lower sealing ring 37, and a lower bellows 39 for sealing the lower elastic member 40 is provided between the second lower sealing ring 37 and the valve ball. A lower annular mounting plate 38 is also provided at the upper end of the valve ball, and the lower end of the lower bellows 39 is connected to the second lower sealing ring 37, and the upper end is connected to the lower annular mounting plate 38. The lower elastic member also adopts a corrugated spring.

[0028] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0029] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0030] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

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

Claims

1. A mechanical hard-sealed black water and grey water special valve, comprising a valve body and a valve ball, wherein the valve body has a valve cavity and a valve body channel connected to the valve cavity, the valve body channel has a medium inlet and a medium outlet, and the valve ball is rotatably installed in the valve cavity through a ball shaft, and is used to open and block the valve body channel, and is 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 mechanical hard-sealed black water and grey water dedicated valve according to claim 1 is characterized by: Each sealing structure includes a boss arranged on the inner wall of the valve cavity, and the boss is provided with a mounting hole for the corresponding ball shaft to be rotatably installed; the upper and lower ends of the ball valve have mounting planes corresponding to the corresponding bosses, and a sealing ring structure is provided between each mounting plane and the table surface of the corresponding boss.

3. The mechanical hard seal black water and grey water dedicated valve according to claim 2 is characterized by: The boss is provided with a sealing groove, and 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. The first sealing ring and the second sealing ring are sealingly matched.

4. The mechanical hard-sealed black water and grey water dedicated valve according to claim 3 is characterized by: An elastic member is arranged on the installation step between the step surface and the second sealing ring, and a bellows for sealing the elastic member is arranged between the second sealing ring and the valve ball.

5. The mechanical hard-sealed black water and grey water dedicated valve according to claim 4 is characterized in that: An annular mounting plate is also provided at the corresponding end of the valve ball. 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 mechanical hard-sealed black water and grey water dedicated valve according to claim 2, characterized in that: A first sealing groove is arranged on the boss, a second sealing groove corresponding to the first sealing groove is arranged on the mounting plane, 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 sealed in cooperation.

7. The mechanical hard-sealed black water and grey water dedicated valve according to claim 6, characterized in that: An elastic member is arranged in the second sealing groove between the groove bottom and the second sealing ring.

8. The mechanical hard-sealed black water and grey water dedicated valve according to claim 3 or 6, characterized in that: The first sealing ring and the second sealing ring are both metal sealing rings.

9. The mechanical hard-sealed black water and grey water dedicated valve according to claim 1, characterized in that: The upper ball shaft, the lower ball shaft and the valve ball are integrally formed.

10. The mechanical hard seal black water and grey water dedicated valve according to claim 1, characterized in that: The valve body comprises a lower valve body and an upper valve cover. The lower valve body is provided with a mounting hole opening upward for inserting a valve ball, and the upper valve cover is provided with a corresponding boss.

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