Spray valve for cleaning polymerization kettle

Abstract

The utility model provides a spray valve for cleaning a polymeric kettle, and relates to the technical field of polymeric kettle cleaning, the spray valve comprises a cylinder assembly, a piston rod, a valve rod, a valve body and a valve clack, the cylinder assembly is externally connected with a control system, and the cylinder assembly is controlled to drive the piston rod to slide in the valve body; a plurality of groups of spraying valves are arranged; a reducer union is mounted at one end, far away from the cylinder assembly, of the valve body and is used for mounting a reserved pipe orifice in the polymerization kettle; the piston rod drives the valve rod and the valve clack to synchronously move along the shaft; the end, away from the piston rod, of the valve rod extends into the valve body and is in sliding connection with the valve body. A spraying structure is arranged on the valve clack, the spraying structure comprises a plurality of jet flow holes, the jet flow holes are all obliquely upward, and the jet flow holes are located at different axial heights of the valve clack, so that the problems that in the prior art, a polymerization kettle needs to be cleaned in a shutdown mode, the cleaning range of the polymerization kettle is limited through existing mechanical cleaning, and the cleaning efficiency is high are solved. And high-pressure water jet cannot reach the upper part of the kettle body, a gap of a mechanical seal shell and the like, so that the cleaning is not thorough.

Description

Technical Field

[0001] The utility model relates to the technical field of polymerization kettle cleaning, and particularly relates to a spray valve for cleaning a polymerization kettle. Background Art

[0002] The polymerization kettle is the main equipment for preparing chemical products, mainly composed of a kettle body, a kettle cover, a jacket, a stirrer, a transmission device, a shaft seal device, a support, etc. After the polymerization kettle is used for a period of time, due to reasons such as material scaling, microbial proliferation, and impurity accumulation, it needs to be cleaned.

[0003] At present, the polymerization kettle is cleaned by mechanical cleaning. Mechanical cleaning mainly refers to mechanical water jet high-pressure cleaning. A high-pressure cleaning device is used to crush, peel off, and remove the dirt on the inner wall of the reaction kettle and the surface of the stirrer by using high-pressure water jets. This cleaning method is efficient and fast. However, the mechanical cleaning has limited cleaning range for the polymerization kettle, and the high-pressure water jets cannot reach the upper part of the kettle body and the gaps of the mechanical seal housing, etc., resulting in incomplete cleaning problems.

[0004] Therefore, a spray valve for cleaning a polymerization kettle is proposed. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a spray valve for cleaning a polymerization kettle, which solves the problem of the limited cleaning range of the polymerization kettle in the prior art by mechanical cleaning.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the utility model is realized through the following technical solutions:

[0009] In the utility model, the spray valve for cleaning a polymerization kettle includes a cylinder assembly, a piston rod, a valve rod, a valve body, and a valve flap. The cylinder assembly is externally connected with a control system to control the cylinder assembly to drive the piston rod to slide in the valve body;

[0010] Multiple groups of the spray valves are provided;

[0011] A reducing joint is installed at one end of the valve body away from the cylinder assembly for installing the reserved pipe orifice on the polymerization kettle;

[0012] The piston rod drives the valve rod and the valve flap to move synchronously along the axis;

[0013] One end of the valve rod away from the piston rod extends into the interior of the valve body and is slidably connected with the valve body;

[0014] A spray structure is provided on the valve flap. The spray structure includes a plurality of jet holes, and the orientations of the plurality of jet holes are all obliquely upward, and the plurality of jet holes are located at different axial heights of the valve flap.

[0015] In the present utility model, further, the cylinder assembly is installed on the valve body through a cylinder mounting flange and a plurality of piston guide rods, and a plurality of tie rods are provided around the cylinder assembly.

[0016] In the present utility model, further, a guide ring is installed between the plurality of piston guide rods, a piston rod connecting body is fixedly embedded inside the guide ring, and the piston rod passes through the piston rod connecting body and is slidably connected to the piston rod connecting body.

[0017] In the present utility model, further, a valve seat is installed between the valve body and the reducing joint.

[0018] In the present utility model, further, a bushing is installed at one end of the valve body close to the cylinder assembly, and the bushing is embedded at the end of the valve body on the side close to the cylinder assembly.

[0019] In the present utility model, further, a sealing ring is also installed at one end of the valve body close to the cylinder assembly. The sealing ring is located below the bushing and between the inner side wall of the valve body and the valve stem.

[0020] In the present utility model, further, at least two O-ring grooves are formed on the inner and outer end faces of the sealing ring, and O-rings are installed in the O-ring grooves.

[0021] (III) Beneficial effects

[0022] The present utility model provides a spray valve for cleaning a polymerization kettle. Compared with the prior art, it has the following beneficial effects:

[0023] By providing multiple groups of spray valves on the polymerization kettle, and the spray valves are connected to the polymerization kettle through the reserved pipe orifices on the polymerization kettle, the polymerization kettle can be cleaned without stopping the machine. And by providing a plurality of jet holes on the valve flap, and the plurality of jet holes are located at different axial heights of the valve flap, the spraying range of the spray structure is expanded, solving the problems in the prior art that the cleaning of the polymerization kettle requires stopping the machine for cleaning, and the cleaning range of the existing mechanical cleaning for the polymerization kettle is limited, and the high-pressure water jet cannot reach the upper part of the kettle body and the gaps of the mechanical seal housing, etc., resulting in incomplete cleaning. Description of the drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of a spray valve for cleaning a polymerization kettle;

[0026] Figure 2 is Figure 1 the enlarged view of part A in

[0027] Figure 3 is Figure 1 the partial structural diagram of

[0028] Figure 4 is Figure 3 the state structural diagram when the valve flap is opened in

[0029] Figure 5 is the structural diagram of the cleaning water being sprayed from the jet holes when the valve flap is opened;

[0030] Figure 6 is the structural diagram when the valve flap is closed.

[0031] Reference numerals:

[0032] Figure: 1. Cylinder assembly; 2. Pull rod; 3. Cylinder mounting flange; 4. Piston rod; 5. Piston guide rod; 6. Piston rod connecting body; 7. Guide ring; 8. Valve rod; 9. Compression sleeve; 10. Valve body; 11. Sealing ring; 12. O-ring; 13. Valve seat; 14. Reducing joint; 15. Valve flap; 16. Jet hole. Detailed implementation manners

[0033] To make the objectives, 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. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0034] The embodiments of the present application provide a spray valve for cleaning a polymerization kettle, which solves the problem that the cleaning range of the polymerization kettle by mechanical cleaning has limitations in the prior art and improves the cleaning effect of the polymerization kettle.

[0035] The technical solutions in the embodiments of the present application for solving the above technical problems are generally as follows:

[0036] As Figures 1 - 6 shown, by setting multiple groups of spray valves on the polymerization kettle, and connecting the spray valves to the polymerization kettle through the reserved pipe orifices on the polymerization kettle, it is possible to clean the polymerization kettle without stopping the machine, and by setting multiple jet holes on the valve flap, and the multiple jet holes are located at different axial heights of the valve flap, the spraying range of the spray structure is expanded, solving the problems in the prior art that the cleaning of the polymerization kettle requires shutdown cleaning, and the cleaning range of the existing mechanical cleaning for the polymerization kettle is limited, and the high-pressure water jet cannot reach the upper part of the kettle body and the gaps of the mechanical seal housing, etc., resulting in incomplete cleaning.

[0037] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0038] As Figure 1 、 Figures 3 - 5 shown, a spray valve for cleaning a polymerization kettle includes a cylinder assembly 1, a piston rod 4, a valve rod 8, a valve body 10 and a valve flap 15. The cylinder assembly 1 is externally connected with a control system to control the cylinder assembly 1 to drive the piston rod 4 to slide in the valve body;

[0039] Multiple groups of the spray valves are provided;

[0040] A reducing joint 14 is installed at one end of the valve body 10 away from the cylinder assembly 1 for installing the reserved pipe orifice on the polymerization kettle;

[0041] The piston rod 4 drives the valve rod 8 and the valve flap 15 to move synchronously along the axis;

[0042] One end of the valve rod 8 away from the piston rod 4 extends into the interior of the valve body 10 and is slidably connected with the valve body 10;

[0043] A spray structure is provided on the valve flap 15. The spray structure includes multiple jet holes 16. The orientations of the multiple jet holes 16 are all obliquely upward, and the multiple jet holes 16 are located at different axial heights of the valve flap 15;

[0044] Among them, according to the empirical formula, the outlet flow velocity Vc of the jet hole 16 can be expressed in the following form:

[0045]

[0046] Among them, H0 is the sum of the highest water level height of the valve body 10 and the external cleaning water head, φ is the velocity coefficient, generally taking 0.97 - 0.98, and substituting the water pressure of 0.8 mpa into the expression, the outlet flow velocity Vc of the jet hole 16 is about 38.6 m / s, and this flow velocity can meet the flushing speed requirements.

[0047] By arranging multiple groups of spray valves on the polymerization kettle, and connecting the spray valves to the polymerization kettle through the reserved pipe orifices on the polymerization kettle, the polymerization kettle can be cleaned without stopping the machine. Moreover, multiple jet holes 16 are arranged on the valve flap 15, and the multiple jet holes 16 are located at different axial heights of the valve flap 15, expanding the spraying range of the spray structure, solving the problems in the prior art that the polymerization kettle needs to be shut down for cleaning, and the cleaning range of the existing mechanical cleaning for the polymerization kettle is limited, and the high-pressure water jet cannot reach the upper part of the kettle body and the gaps of the mechanical seal housing, etc., resulting in incomplete cleaning.

[0048] As Figure 1 shown, the cylinder assembly 1 is installed with the valve body 10 through the cylinder mounting flange 3 and multiple piston guide rods 5, and multiple tie rods 2 are arranged around the cylinder assembly 1 to ensure that the cylinder assembly 1 can provide a stable air source for the piston rod 4.

[0049] As Figure 1 shown, a guide ring 7 is installed between the multiple piston guide rods 5, a piston rod connector 6 is fixedly embedded inside the guide ring 7, and the piston rod 4 passes through the piston rod connector 6 and is slidably connected with the piston rod connector 6.

[0050] Through the piston rod connector 6 and the guide ring 7, the stability of the piston rod 4 and the valve rod 8 during driving is improved.

[0051] As Figure 1 shown, a valve seat 13 is installed between the valve body 10 and the reducer joint 14. The setting of the valve seat 13 can effectively improve the sealing performance between the valve body 10 and the reducer joint 14.

[0052] As Figures 1 - 2 shown, a bushing 9 is installed at one end of the valve body 10 close to the cylinder assembly 1. The bushing 9 is embedded at the end of the valve body 10 on the side close to the cylinder assembly 1. The setting of the bushing 9 can facilitate the sliding of the valve rod 8 in the valve body 10.

[0053] As Figures 1 - 2 shown, a sealing ring 11 is also installed at one end of the valve body 10 close to the cylinder assembly 1. The sealing ring 11 is located below the bushing 9 and between the inner side wall of the valve body 10 and the valve rod 8. The sealing ring 11 plays a guiding role for the valve rod 8 to prevent the valve rod 8 from deviating during the up and down movement.

[0054] As Figures 1 - 2 shown, at least two O-ring grooves are opened on the inner and outer end faces of the sealing ring 11, and O-rings 12 are installed in the O-ring grooves. Using the O-rings 12 for sealing, combined with the use of the sealing ring 11, it has a double sealing effect and eliminates the possibility of cleaning water leakage.

[0055] This application belongs to mechanical cleaning and provides a spray valve specifically for cleaning polymerization reactors. The overall spray valve is connected to the process reserved pipe orifice of the polymerization reactor through a flange, uses compressed air to provide control power, externally connects a high-pressure water pump to provide cleaning power, and the air cylinder drives the piston rod 4 to drive the valve stem 8 to reciprocate up and down, realizing the opening and closing of the valve. By using the high-pressure water pump, the cleaning of dead angles such as the top of the reactor and the gap of the mechanical seal housing is completed. It solves the problems in the prior art that during cleaning, it is necessary to remove the manhole or other auxiliary facilities or pipelines of the polymerization reactor. Since manual operation is carried out outside the reactor, it is impossible to clean comprehensively without personnel entering, especially the top structure cannot be cleaned. Moreover, the existing polymerization reactors need to be shut down for cleaning, which increases the cleaning cost on the one hand and affects the continuity of equipment production on the other hand. For reactors that need to be cleaned frequently, this problem is particularly obvious. The developed spray valve has a simple and clear structure, a wide cleaning range, good cleaning effect, and high timeliness, and has broad application prospects.

[0056] By reserving a cleaning pipe orifice during the design stage of the polymerization reactor or adding a cleaning pipe orifice to the existing polymerization reactor, the present utility model is installed on the polymerization reactor body and does not need to be removed after being put into use. According to the size of the polymerization reactor, multiple spray valves can be arranged to clean each angle of the reactor without dead angles. The spray valve can realize online simultaneous cleaning when the polymerization reactor is working, and is equipped with water or directly uses the medium inside the reactor to clean the inside. Then, through the reciprocating motion of the cylinder assembly 1 along the axis, the opening and closing of the valve flap 15 are realized, so as to realize the cleaning of dead angles such as the top of the reactor and the mechanical seal components. The form of the polymerization reactor spray valve is a pneumatic piston valve, which relies on an external air source to provide the driving force for the valve stem 8. The cleaning water of the spray valve is externally supplied water, and its water supply pressure is provided by an external water pump, generally 0.5 - 2.5 MPa (not limited to this range), and the flow rate can be adjusted by the valve on the water supply pipeline.

[0057] During operation, specifically as Figures 1 - 6 shown, the opening, closing process and principle of the spray valve are as follows:

[0058] When the spray valve is opened, the valve on the external air source pipeline is controlled through the control system, so that the air source enters from above the cylinder assembly 1 and drives the piston rod 4 to move axially downward. At the same time, the piston rod 4 drives the valve stem 8 and the valve flap 15 to move axially downward. In order to ensure the axial centering of the piston rod 4 during movement, multiple piston guide rods 5 are provided, and a guide ring 7 is installed on the piston rod 4 to ensure the up and down centering of the piston rod 4. When it runs to a certain position, the liquid inlet hole on the valve stem 8 will be exposed at the flushing water flange of the valve body 10. At this time, the high-pressure flushing water will enter the valve stem 8 along the liquid inlet hole of the valve stem 8 and be injected into the central hole of the valve flap 10. To ensure that the liquid inlet volume meets the flushing requirements, multiple round holes with a diameter of Φ15 are evenly opened along the circumferential direction of the valve stem 8.

[0059] As the piston rod 4 continues to move downward, the valve flap 15 will gradually disengage from the valve seat 13 until the jet holes 16 on the valve flap 15 are completely exposed to the environment. Since the orientation of the jet holes 16 is obliquely upward, the high-pressure cleaning water in the central hole of the valve flap 15 will spray upward along the jet holes 16, thereby realizing the cleaning of the top of the kettle, the mechanical seal of the stirring shaft, and the kettle wall.

[0060] When the spray valve is closed, by switching the reversing valve on the external gas source pipeline, the gas source enters from the bottom of the cylinder, thereby pushing the piston rod 4 upward. At the same time, the valve stem 8 will drive the valve flap 15 to rise axially together under the traction of the piston rod 4 until a certain position where the conical surface of the valve flap 15 contacts the inner shoulder of the valve seat 13 and forms a line seal between the two, as specifically shown in Figure 6 As shown, at this time, the piston rod 4 cannot continue to rise, the external gas source stops supplying gas, the spray valve completes the closing action, and the cleaning of the polymerization kettle is completed.

[0061] Using the application of this product in the paste resin polymerization kettle, the economic benefits generated are mainly that the cleaning cost of the polymerization kettle is about 12,000 yuan per time per unit per month, and the instant cleaning feature of the spray valve reduces the number of times of mechanical seal maintenance and replacement, thereby reducing the maintenance cost, improving the production efficiency of the polymerization kettle, and reducing the indirect losses of shutdown and production suspension.

[0062] It should be noted that the gas source drives the valve stem 8 to control the opening and closing of the spray valve, realizing the spraying of cleaning water by the valve flap 15, which is the same as the principle of the spray valve for spraying cleaning water in the prior art. Therefore, the process of spraying cleaning water is simply described in this application, and the specific working principle of the spray valve is not elaborated.

[0063] To sum up, compared with the prior art, the following beneficial effects are achieved:

[0064] 1. By setting multiple groups of spray valves on the polymerization kettle, and the spray valves are connected to the polymerization kettle through the reserved pipe orifices on the polymerization kettle, the polymerization kettle can be cleaned without shutting down the machine. Moreover, by setting multiple jet holes 16 on the valve flap 15, and the multiple jet holes 16 are located at different axial heights of the valve flap 15, the spraying range of the spraying structure is expanded, solving the problems in the prior art that the cleaning of the polymerization kettle requires shutdown cleaning, and the cleaning range of the existing mechanical cleaning for the polymerization kettle is limited, and the high-pressure water jet cannot reach the upper part of the kettle body and the gaps of the mechanical seal housing, etc., resulting in incomplete cleaning.

[0065] 2. The spray valve as a whole is connected to the process reserved pipe orifice of the polymerization kettle through a flange, uses compressed air to provide control power, externally connects a high-pressure water pump to provide cleaning power, and the air cylinder drives the piston rod 4 to drive the valve stem 8 to reciprocate up and down, realizing the opening and closing of the valve. By using the high-pressure water pump, the cleaning of dead corners such as the top of the kettle and the gap of the mechanical seal housing is completed, solving the problems in the prior art that during cleaning, it is necessary to remove the manhole or other auxiliary facilities or pipelines of the polymerization kettle. Since manual operation is carried out outside the kettle, it is impossible to clean comprehensively without personnel entering, especially the top structure cannot be cleaned. Moreover, the existing polymerization kettle needs to be shut down for cleaning, which increases the cleaning cost on the one hand and affects the continuity of equipment production on the other hand. For kettles that need to be cleaned frequently, this problem is particularly obvious. The developed spray valve has a simple and clear structure, a wide cleaning range, good cleaning effect, and high timeliness, and has broad application prospects.

[0066] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0067] 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spray valve for cleaning a polymerization kettle, characterized in that, It includes a cylinder assembly (1), a piston rod (4), a valve rod (8), a valve body (10) and a valve flap (15). The cylinder assembly (1) is externally connected to a control system to control the cylinder assembly (1) to drive the piston rod (4) to slide in the valve body; There are multiple groups of the spray valves; A reducing joint (14) is installed at one end of the valve body (10) away from the cylinder assembly (1) for installing the reserved pipe orifice on the polymerization kettle; The piston rod (4) drives the valve rod (8) and the valve flap (15) to move synchronously along the axis; One end of the valve rod (8) away from the piston rod (4) extends into the interior of the valve body (10) and is slidably connected to the valve body (10); A spray structure is arranged on the valve flap (15). The spray structure includes a plurality of jet holes (16). The orientations of the plurality of jet holes (16) are all obliquely upward, and the plurality of jet holes (16) are located at different axial heights of the valve flap (15).

2. The spray valve for cleaning a polymerization kettle according to claim 1, wherein The cylinder assembly (1) is installed on the valve body (10) through a cylinder mounting flange (3) and a plurality of piston guide rods (5), and a plurality of tie rods (2) are arranged around the cylinder assembly (1).

3. The spray valve for cleaning a polymerization kettle according to claim 2, wherein, A guide ring (7) is installed between the plurality of piston guide rods (5). A piston rod connecting body (6) is fixedly embedded inside the guide ring (7). The piston rod (4) passes through the piston rod connecting body (6) and is slidably connected to the piston rod connecting body (6).

4. The spray valve for cleaning an autoclave according to claim 1, wherein A valve seat (13) is installed between the valve body (10) and the reducing joint (14).

5. A spray valve for cleaning a polymerization kettle according to claim 1, characterized in that, A bushing (9) is installed at one end of the valve body (10) close to the cylinder assembly (1). The bushing (9) is embedded at the end of the valve body (10) on the side close to the cylinder assembly (1).

6. The spray valve for cleaning an autoclave according to claim 1, characterized in that, A sealing ring (11) is also installed at one end of the valve body (10) close to the cylinder assembly (1). The sealing ring (11) is located below the bushing (9) and between the inner side wall of the valve body (10) and the valve rod (8).

7. The spray valve for cleaning an autoclave according to claim 6, wherein, At least two O-ring grooves are opened on the inner and outer end faces of the sealing ring (11), and O-rings (12) are installed in the O-ring grooves.

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