Labyrinth block hole sealing method and device

Abstract

The invention discloses a labyrinth block hole sealing method which comprises the following steps: mixing NaOH and NaNO3 according to a weight ratio of 7: 3 to obtain a salt mixture, and heating the salt mixture to melt the salt mixture in a liquid state; and after machining is finished, the salt mixture is cleaned with clear water. According to the hole sealing method, the filings are effectively prevented from entering the zigzag flow channel, meanwhile, the characteristic that the salt mixture is dissolved in water can be utilized, the later cleaning convenience is ensured, and then the product quality can be improved. In the hole sealing process, by means of the hole sealing device, a liquid salt mixture can be injected into a cavity formed by the labyrinth valve element, the upper cover and the lower cover through the liquid injection pipe, salt liquid flows to the outer surface of the labyrinth valve element through pressure difference, then the space of the cavity is kept unchanged, and the lower cover and the upper cover move upwards till hole sealing is completed. By the adoption of the device, the salt liquid can be quickly injected into the labyrinth valve element, and the operation process is simple and convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve application, in particular to a labyrinth block hole sealing method and device. BACKGROUND

[0002] The labyrinth block is a core part of a multi-corner multi-channel regulating valve, which is composed of multiple groups of labyrinth sheets and is not a single integral part. Therefore, each labyrinth block surface forms a tortuous flow channel and a turning structure. When high-pressure fluid medium flows through these continuous and multi-stage tortuous flow channels, it will continuously impact the flow channel wall, causing energy loss. Through this "step-by-step energy consumption" method, multi-stage pressure reduction of the fluid medium is ultimately achieved. Through multi-stage pressure reduction, the high pressure difference is avoided from directly impacting the valve core and valve seat, thereby prolonging the service life of the valve.

[0003] The valve is commonly used in the field of olefin chemical industry. Due to the particularity of olefin chemical industry, the cleanliness level of the valve is required to be high. Since the labyrinth block structure is complex, it is difficult to clean the inside, and therefore, it is a big problem to prevent iron filings and impurities from entering the inside during subsequent machining process. At present, resin glue and hole sealing agent are commonly used for hole sealing treatment. However, due to the poor flow capacity of the materials used for hole sealing, the hole sealing is often incomplete, which leads to unqualified products or the problem of difficult operation during the hole sealing agent pouring process due to the difficulty of cleaning in the later stage. SUMMARY

[0004] The present application aims to provide a labyrinth block hole sealing method and device to solve the problem of poor flow capacity of the materials used for hole sealing, which often leads to incomplete hole sealing, thereby resulting in unqualified products or the problem of difficult operation during the hole sealing agent pouring process due to the difficulty of cleaning in the later stage.

[0005] To solve the above technical problems, the present application provides a labyrinth block hole sealing method, which comprises: Mixing NaOH and NaNO3 in a weight ratio of 7:3 to obtain a salt mixture; Heating the salt mixture to melt it into a liquid state; Using the fluidity of the liquid to seal the tortuous flow channel formed on the surface of the labyrinth block; After the machining is completed, the salt mixture is cleaned with water.

[0006] To solve the above technical problems, the present application also provides a labyrinth block hole sealing device based on any one of the above labyrinth block hole sealing methods, which comprises: A support on which a labyrinth valve core is placed, a first electric push rod below the support, a lower cover fixed to the upper end of the first electric push rod and located in the labyrinth valve core, a drainage pipe communicated on the lower cover, a second electric push rod suspended above the support, an upper cover located in the labyrinth valve core and installed on the lower end of the second electric push rod through a sliding assembly, a liquid injection pipe communicated on the upper cover, a control valve arranged on the liquid injection pipe and the drainage pipe, a heating ring arranged on the outer periphery of the labyrinth valve core, and the heating ring connected with a heating system. The inside of the lower cover and the upper cover is concave spherical surface, and the outside is convex spherical surface so as to form a pressure cabin in the labyrinth valve core.

[0007] As a preferred embodiment, a labyrinth block hole sealing device, the support includes a table body provided with a mounting hole, a support plate fixed on one side of the table body, and a horizontal plate fixed on the upper end of the support plate, the table body is provided with a mounting ring corresponding to the mounting hole, the labyrinth valve core is placed on the mounting ring, the second electric push rod is arranged through the horizontal plate, and the first electric push rod is located below the table body.

[0008] In the scheme, the sliding assembly includes a sliding rail fixed on the inner side of the support plate, a sliding block slidingly arranged on the sliding rail, a horizontal arm fixed on the sliding block, the lower end of the second electric push rod is fixedly connected with the horizontal arm, a connecting rod is fixed on the lower side of the horizontal arm, and the lower end of the connecting rod is connected with the upper cover.

[0009] As a preferred embodiment, a labyrinth block hole sealing device, the support plate and the horizontal plate are integrally formed.

[0010] Compared with the prior art, the labyrinth block hole sealing method provided by the application mixes NaOH and NaNO3 in a proportion of 7:3 by weight to obtain a salt mixture, heats the salt mixture to melt it into a liquid state, reduces the melting point to improve the fluidity of the solution, and uses clean water to clean the salt mixture after mechanical processing. The liquid salt mixture is used to seal the tortuous flow channel formed on the surface of the labyrinth block, which can effectively prevent iron chips from entering the tortuous flow channel during mechanical processing, and can ensure the convenience of later cleaning by using the property of the salt mixture dissolving in water, thereby improving product quality and production efficiency and reducing production cost. During the sealing process, the NaOH and NaNO3 mixture is melted into a liquid, then injected into the chamber formed by the labyrinth valve core, the upper cover and the lower cover through the liquid injection pipe of the upper cover, and the salt liquid is made to flow to the outer surface of the labyrinth valve core by using the pressure difference. Then, the chamber space is kept unchanged, and the lower cover and the upper cover are moved upward by the first electric push rod and the second electric push rod until the sealing is completed. Then, the control valve on the liquid injection pipe is closed, and the control valve on the drainage pipe is opened to drain the excess salt liquid in the chamber. Using this device, the salt liquid can be quickly injected into the labyrinth valve core, and the operation process is simple and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, for those skilled in the art, other drawings can also be obtained without creative efforts based on these drawings.

[0012] Figure 1 A labyrinth block hole sealing device structure schematic diagram provided by the embodiment of the present application; Figure 2 A labyrinth block hole sealing device structure schematic diagram provided by the embodiment of the present application without a labyrinth valve core; Figure 3 A bracket structure schematic diagram provided by the embodiment of the present application; Figure 4 A track and sliding block connection structure schematic diagram provided by the embodiment of the present application; Figure 5 An upper cover structure schematic diagram provided by the embodiment of the present application; Figure 6 A lower cover structure schematic diagram provided by the embodiment of the present application; Figure 7 A sliding rail structure schematic diagram provided by the embodiment of the present application; In the figure: 1, support; 2, labyrinth valve core; 3, first electric push rod; 4, second electric push rod; 5, lower cover; 6, drainage pipe; 7, upper cover; 8, liquid injection pipe; 9, control valve; 10, heating ring; 11, heating system; 12, table body; 13, support plate; 14, cross plate; 15, mounting ring; 16, slide rail; 17, sliding block; 18, cross arm; 19, connecting rod. DETAILED DESCRIPTION

[0013] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings.

[0014] The core of the present application is to provide a labyrinth block hole sealing method and device, which solves the problem that the material used for sealing the hole has poor flow capacity, often resulting in incomplete sealing, thereby causing product unqualification or difficulty in cleaning, which is easy to cause impurities to be left and difficult to operate during the process of pouring the hole sealing agent.

[0015] Figure 1 A labyrinth block hole sealing device structure schematic diagram provided by the embodiments of the present application; Figure 2 A labyrinth block hole sealing device structure schematic diagram provided by the embodiments of the present application does not contain a labyrinth valve core; Figure 3 A support structure schematic diagram provided by the embodiments of the present application; Figure 4 A track and sliding block connection structure schematic diagram provided by the embodiments of the present application; Figure 5 A upper cover structure schematic diagram provided by the embodiments of the present application; Figure 6 A lower cover structure schematic diagram provided by the embodiments of the present application; Figure 7 A slide rail structure schematic diagram provided by the embodiments of the present application, see Figures 1 to 7 .

[0016] Embodiment 1 Mix NaOH and NaNO3 in a weight ratio of 7:3 to obtain a salt mixture; Heat the salt mixture to melt it into a liquid state; the heating temperature is above 200℃.

[0017] Utilize the fluidity of the liquid to form a tortuous flow channel on the surface of the labyrinth block for hole sealing treatment.

[0018] After the mechanical processing is finished, the salt mixture is cleaned by using clean water; since the salt mixture is soluble in water, the clean water can be used for cleaning in the subsequent process, and the cleaning method is simple and convenient. Since the hole sealing material needs to be conducive to cleaning, NaOH is selected by virtue of the characteristic that salt is soluble in water, and pure NaOH has a melting point of 318 DEG C and a large viscosity, and poor fluidity, which leads to insufficient contact and penetration with the pores, and uneven hole sealing. Therefore, in order to reduce the melting point of NaOH and improve the hole sealing quality, NaNO3 is added to NaOH.

[0019] The labyrinth block hole sealing method provided in the embodiment mixes NaOH and NaNO3 in a weight ratio of 7:3 to obtain a salt mixture, heats the salt mixture to melt it into a liquid state, and reduces the melting point to improve the fluidity of the solution. The liquid salt mixture is used to seal the tortuous flow channel formed on the surface of the labyrinth block, effectively prevents iron filings from entering the tortuous flow channel during the mechanical processing, and utilizes the characteristic that the salt mixture is soluble in water to ensure the convenience of the later cleaning, thereby improving the product quality and production efficiency and reducing the production cost.

[0020] The labyrinth block hole sealing method is described in detail in the foregoing embodiment, and based on the labyrinth block hole sealing method described in the foregoing embodiment, the embodiment of the present application further provides a labyrinth block hole sealing device corresponding to the method.

[0021] Embodiment 2 A labyrinth block hole sealing device based on the labyrinth block hole sealing method of embodiment 1, comprising: The bracket 1 is provided with the labyrinth valve core 2, the bracket 1 supports and fixes the labyrinth valve core 2, the first electric push rod 3 is arranged below the bracket 1, the lower end of the first electric push rod 3 is fixed with the lower cover 5, the lower cover 5 is located in the labyrinth valve core 2, the lower cover 5 is provided with the drainage pipe 6 in communication, after the hole sealing is completed, the excess brine can be discharged through the drainage pipe 6. The second electric push rod 4 is suspended above the bracket 1, that is, the second electric push rod 4 is fixed and suspended on the shelf or roof column above the bracket 1, the lower end of the second electric push rod 4 penetrates the bracket 1, and the upper cover 7 is installed through the sliding assembly, the upper cover 7 is located in the labyrinth valve core 2, the upper cover 7 is provided with the liquid injection pipe 8 in communication, the control valve 9 is arranged on the liquid injection pipe 8 and the drainage pipe 6, the interiors of the lower cover 5 and the upper cover 7 are concave spherical surfaces, and the exteriors of the lower cover 5 and the upper cover 7 are convex spherical surfaces, so that the pressure cabin is formed in the labyrinth valve core 2. In use, the small chamber formed by the labyrinth valve core 2, the upper cover 7 and the lower cover 5 is firstly located at the lowermost end of the labyrinth valve core 2, then the control valve 9 on the liquid injection pipe 8 is opened, the brine is injected into the chamber through the liquid injection pipe 8, the brine flows to the outer surface of the labyrinth valve core 2 by using the pressure difference, then the chamber space is kept unchanged, the first electric push rod 3 is controlled to be elongated, the second electric push rod 4 is controlled to be shortened, the lower cover 5 and the upper cover 7 are synchronously moved upwards until the hole sealing is completed. Then, the control valve 9 on the liquid injection pipe 8 is closed, and the control valve 9 on the drainage pipe 6 is opened, so that the excess brine in the chamber is discharged.

[0022] The heating ring 10 is arranged on the outer periphery of the labyrinth valve core 2, the heating ring 10 is connected with the heating system 11, so that the temperature of the labyrinth block is prevented from being too low, and the hole sealing of the brine is not completed.

[0023] Example 3 On the basis of example 2, the bracket 1 comprises the table body 12 provided with the mounting hole, the support plate 13 fixed on one side of the table body 12 and the horizontal plate 14 fixed on the upper end of the support plate 13, the table body 12 is provided with the mounting ring 15 corresponding to the mounting hole, the labyrinth valve core 2 is placed at the mounting ring 15, the support stability of the labyrinth valve core 2 can be improved, the second electric push rod 4 penetrates the horizontal plate 14, and the first electric push rod 3 is located below the table body 12.

[0024] On the basis of example 3, the sliding assembly comprises the sliding rail 16 fixed on the inner side of the support plate 13, the sliding block 17 is arranged in sliding mode on the sliding rail 16, the horizontal arm 18 is fixed on the sliding block 17, the lower end of the second electric push rod 4 is fixedly connected with the horizontal arm 18, the lower side of the horizontal arm 18 is fixed with the connecting rod 19, and the lower end of the connecting rod 19 is connected with the upper cover 7. In use, the sliding block 17 is moved up and down along the sliding rail 16 by controlling the extension and retraction of the second electric push rod 4, the horizontal arm 18 is moved up and down, and finally the upper cover 7 is moved up and down through the connecting rod 19.

[0025] On the basis of Embodiment 3, in order to improve the design convenience, preferably, the support plate 13 and the horizontal plate 14 can be set as an integrated molding structure.

[0026] In the hole sealing process of the labyrinth block hole sealing device provided in the embodiments of the present application, the NaOH and NaNO3 mixture is melted into liquid, and then is injected into the cavity formed by the labyrinth valve core 2, the upper cover 7 and the lower cover 5 through the liquid injection pipe 8 of the upper cover 7, the salt liquid is made to flow to the outer surface of the labyrinth valve core 2 by the pressure difference, then the cavity space is kept unchanged, the lower cover 5 and the upper cover 7 are moved upward by the first electric push rod 3 and the second electric push rod 4 until the hole sealing is completed. After that, the control valve 9 on the liquid injection pipe 8 is closed, the control valve 9 on the drainage pipe 6 is opened, and the excess salt liquid inside the cavity is drained. By using the device, the salt liquid can be quickly injected into the labyrinth valve core 2, and the operation process is simple and convenient.

[0027] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope of the application being indicated by the following claims.

[0028] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The embodiments of the application described above do not constitute limitations on the scope of protection of the application.

Claims

1. A method for sealing holes in a maze block, characterized in that, include: NaOH and NaNO3 are mixed in a weight ratio of 7:3 to obtain a salt mixture; The salt mixture is heated until it melts and enters a liquid state; The fluidity of the liquid is used to seal the tortuous channels formed on the surface of the maze block; After machining, the salt mixture is cleaned with water.

2. A maze block sealing device, based on the maze block sealing method according to claim 1, characterized in that, include: A bracket (1) is provided with a labyrinth valve core (2) on the bracket (1). A first electric push rod (3) is provided below the bracket (1). A lower cover (5) located inside the labyrinth valve core (2) is fixed at the upper end of the first electric push rod (3). A drain pipe (6) is connected to the lower cover (5). A second electric push rod (4) is suspended above the bracket (1). The lower end of the second electric push rod (4) passes through the bracket (1) and is installed with an upper cover (7) located inside the labyrinth valve core (2) through a sliding component. An injection pipe (8) is connected to the upper cover (7). A control valve (9) is provided on both the injection pipe (8) and the drain pipe (6). A heating coil (10) is provided on the outer periphery of the labyrinth valve core (2). The heating coil (10) is connected to the heating system (11). The interior of the lower cover (5) and the upper cover (7) are both concave spherical surfaces, and the exterior is both convex spherical surfaces, so as to form a pressure chamber inside the labyrinth valve core (2).

3. The labyrinth block sealing device according to claim 2, characterized in that, The bracket (1) includes a platform (12) with mounting holes, a support plate (13) fixed to one side of the platform (12), and a horizontal plate (14) fixed to the upper end of the support plate (13). The platform (12) is provided with a mounting ring (15) corresponding to the mounting holes. The labyrinth valve core (2) is placed at the mounting ring (15). The second electric push rod (4) is provided through the horizontal plate (14). The first electric push rod (3) is located below the platform (12).

4. The labyrinth block sealing device according to claim 3, characterized in that, The sliding assembly includes a slide rail (16) fixed to the inner side of the support plate (13), a slider (17) is slidably disposed on the slide rail (16), a cross arm (18) is fixed on the slider (17), the lower end of the second electric push rod (4) is fixedly connected to the cross arm (18), a connecting rod (19) is fixed on the lower side of the cross arm (18), and the lower end of the connecting rod (19) is connected to the upper cover (7).

5. The labyrinth block sealing device according to claim 3, characterized in that, The support plate (13) and the horizontal plate (14) are integrally formed.

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