polymer control valve

Abstract

This invention provides a polymer regulating valve, comprising a valve body with a medium cavity inside, an inlet channel and an outlet channel connected to the medium cavity; a valve cover mounted on the valve body, the valve body having a guide portion, at least a portion of which extends into the medium cavity; and a heat insulation assembly including a heat insulation shell mounted on the valve body, the heat insulation shell forming a heat insulation cavity, the medium cavity being located within the heat insulation cavity. This invention achieves uniform heat insulation for all polymer media by completely placing the medium cavity within the heat insulation cavity and employing a continuous heat insulation structure, thereby improving the heat insulation effect, valve lifespan, and system operational reliability.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a polymer regulating valve. Background Technology

[0002] For insulated jacketed valves used with high polymer media, as shown in the figure below, when the valve is closed and restarted on-site, due to polymer solidification, it is necessary to preheat and maintain the temperature for a period of time by passing heat transfer oil or steam through the insulation jacket to ensure that the polymer medium is completely melted into a liquid, thus ensuring normal valve opening and regulation. Because insulation cavities are set on the valve cover and valve body respectively, the insulation medium can only pass through the upper valve cover and valve body, forming an area between the upper valve cover and valve body that cannot be insulated. This results in insufficient insulation, and the poor thermal conductivity of polymers prolongs the melting time of the high polymer in the valve body, affecting on-site production efficiency. If the polymer material is not completely melted, it may cause damage during the valve opening process on-site, affecting the valve's service life. Utility Model Content

[0003] This invention provides a polymer regulating valve to solve the technical problem of insufficient heat preservation effect of existing polymer regulating valves.

[0004] This utility model provides a polymer regulating valve, the polymer regulating valve comprising: The valve body has a medium cavity inside, and the valve body is provided with an inlet channel and an outlet channel, which are respectively connected to the medium cavity; A valve cover is disposed on the valve body, the valve body having a guide portion, at least a portion of the guide portion extending into the medium cavity; The insulation component includes an insulation shell disposed on the valve body, the insulation shell forming an insulation cavity, and the medium cavity located within the insulation cavity.

[0005] In one embodiment of the present invention, the outer wall of the guide portion is inclined, the diameter of the guide portion gradually decreases along the extension direction from the valve cover to the discharge channel, and at least a portion of the outer wall of the guide portion is positioned opposite the feed channel.

[0006] In one embodiment of the present invention, the valve cover is provided with a valve core, the valve core passes through the valve cover and the medium cavity and enters the discharge channel, and a sealing assembly is provided between the valve core and the guide portion, the sealing assembly including a gasket, a packing, a first septum and a second septum arranged sequentially from bottom to top.

[0007] In one embodiment of the present invention, the valve core and the discharge channel have a mating structure, which can be used to open or seal the discharge channel.

[0008] In one embodiment of this utility model, the mating structure includes a valve seat and a sealing head. The valve seat is disposed at the end of the discharge channel away from the medium cavity, and the sealing head is disposed at the end of the valve core near the discharge channel. The sealing head has a first mating surface, and the valve seat has a second mating surface. When the valve core moves away from the valve seat, the first mating surface and the second mating surface separate, and the discharge channel opens. When the valve core moves close to the valve seat and the sealing head presses against the valve seat, the discharge channel is sealed.

[0009] In one embodiment of the present invention, a bushing is provided in the discharge channel, the bushing is disposed on the side of the valve seat near the medium channel, and a plurality of spaced contact bodies are provided on the valve core, the outer edge of the contact body being used for contact and guidance with the bushing.

[0010] In one embodiment of the present invention, at least a portion of the feeding channel is located within the insulation cavity, and at least a portion of the discharging channel is located within the insulation cavity.

[0011] In one embodiment of the present invention, the valve seat has a discharge hole, and the diameter of the discharge hole gradually decreases and then gradually increases along the axial direction of the valve seat.

[0012] In one embodiment of this utility model, the insulation component further includes a connecting flange, which is disposed on the insulation shell and used to introduce an insulation medium into the insulation cavity. This utility model also provides a polymer regulating valve, which includes: The beneficial effects of this utility model are as follows: The polymer regulating valve proposed in this utility model effectively eliminates the "cold bridge" area in traditional valves by completely setting the medium cavity in the insulation cavity and adopting a continuous insulation structure. This achieves uniform insulation of all polymer media, improves the insulation effect, shortens the polymer melting time, reduces maintenance costs, and improves the service life of the valve and the reliability of system operation. Attached Figure Description

[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0014] In the attached diagram: Figure 1 A first sectional view provided for an embodiment of the present utility model; Figure 2 In this utility model Figure 1 Enlarged view of point A; Figure 3 In this utility model Figure 1 Enlarged view of point B; Figure 4 This is a second sectional view provided in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the contact body provided in one embodiment of the present invention.

[0015] The attached figures are labeled as follows: Valve body 1, medium cavity 101, feed channel 102, discharge channel 103, arc guide surface 104, insulation shell 2, insulation cavity 201, valve cover 3, guide part 301, valve core 4, contact body 401, sealing head 402, first mating surface 4021, gasket 5, packing 6, first diaphragm 7, second diaphragm 8, bushing 9, valve seat 10, second mating surface 1001, discharge hole 1002, combination gasket 11, connecting flange 12. Detailed Implementation

[0016] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0017] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0018] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0019] like Figures 1-5 As shown, this utility model provides a polymer regulating valve.

[0020] In an exemplary embodiment, the polymer regulating valve includes a valve body 1, a valve cover 3, and a thermal insulation assembly. The valve body 1 has a medium chamber 101, an inlet channel 102, and an outlet channel 103, which are respectively connected to the medium chamber 101. The polymer medium enters the medium chamber 101 through the inlet channel 102 and exits through the outlet channel 103. The valve cover 3 is disposed on the valve body 1, and the valve body 1 has a guide portion 301, at least a portion of which extends into the medium chamber 101. The thermal insulation assembly includes a thermal insulation shell 2 disposed on the valve body 1, the thermal insulation shell 2 forming a thermal insulation chamber 201, within which the medium chamber 101 is located.

[0021] In this embodiment, by completely placing the medium cavity 101 within the insulation cavity 201, comprehensive insulation of the polymer medium flow path is achieved. Specifically, the insulation cavity 201 encloses the entire medium cavity 101, eliminating the insulation blind spot at the connection between the valve cover 3 and the valve body 1 in traditional structures. Therefore, the polymer medium can receive sufficiently uniform heating inside the valve, avoiding solidification problems caused by insufficient insulation in localized areas. Thus, the structure of this invention significantly improves the insulation effect, shortens the polymer melting time, and ensures the normal opening and adjustment functions of the valve upon restart.

[0022] For example, the insulation assembly also includes a connecting flange 12, which is disposed on the insulation shell 2. The insulation shell 2 can be a split structure, and the flanges are connected to form a complete insulation cavity 201. A heat transfer oil channel or a steam channel can be provided inside the insulation shell 2. As a preferred embodiment, the heat transfer oil channel can be arranged in a spiral coil structure on the inner wall of the insulation shell 2. A heat insulation layer, such as ceramic fiber material, can be provided between the insulation shell 2 and the valve body 1. The shape of the insulation cavity 201 can be adapted to the shape of the medium cavity 101 to ensure a uniform spacing between them.

[0023] It is worth noting that the insulation shell 2 in this embodiment is made of multiple composite metal plates welded together, and the insulation shell 2 is welded to the valve body 1 to achieve a stable connection.

[0024] It should also be noted that in this embodiment, the insulation cavity 201 is sufficient to encompass all the medium cavities 101.

[0025] In an exemplary embodiment, the discharge channel 103 is disposed at the bottom of the valve body 1, and the inner wall of the medium cavity 101 is an arc guide surface 104, which can be used to guide the medium in the medium cavity 101 to the discharge channel 103.

[0026] In this embodiment, by placing the discharge channel 103 at the bottom of the valve body 1, gravity is used to promote the flow of high-viscosity media; simultaneously, the use of a circular arc guide surface 104 effectively eliminates flow dead zones. Experimental verification shows that this structure can significantly reduce the amount of polymer media remaining in the valve body 1 and increase the media flow rate. Therefore, this invention achieves smooth media delivery through structural optimization alone, without requiring additional power devices. The synergistic effect of the circular arc guide surface 104 and the bottom discharge channel 103 prevents shearing and stratification of the media during turning, ensuring material uniformity.

[0027] For example, the discharge channel 103 located at the bottom of the valve body 1 can be implemented in the following way: the axis of the discharge channel 103 is parallel to the direction of gravity or arranged at an acute angle. The arc guide surface 104 can be formed by a single arc or a combination of multiple tangent arcs. Specifically, the bottom of the medium cavity 101 can be designed as a hemispherical or bowl-shaped structure, and a transition fillet with a radius of not less than 5mm is provided at the connection between it and the discharge channel 103. The surface of the arc guide surface 104 can be mirror polished.

[0028] In an exemplary embodiment, the outer wall of the guide portion 301 is inclined, the diameter of the guide portion 301 gradually decreases along the extension direction from the valve cover 3 to the discharge channel 103, and at least a portion of the outer wall of the guide portion 301 is disposed opposite to the feed channel 102.

[0029] In this embodiment, the inclined structure guides the medium to flow along a preset path, and the gradual diameter design reduces the abrupt change in the flow cross-section. The arrangement directly opposite the feed channel 102 allows the medium to receive direct guidance. Compared with existing planar guiding structures, the guide portion 301 can effectively reduce the medium flow resistance and effectively prevent polymer accumulation at the edge of the guide portion 301.

[0030] For example, the bevel angle of the outer wall of the guide portion 301 can be adjusted within the range of 5° to 30° to accommodate the flow requirements of media with different viscosities. The gradual change in diameter can be achieved through a conical structure or a segmented stepped structure, wherein the transition of the conical structure is smoother.

[0031] In an exemplary embodiment, the valve cover 3 is provided with a valve core 4, which passes through the valve cover 3 and the medium cavity 101 and enters the discharge channel 103. A sealing assembly is provided between the valve core 4 and the guide portion 301. The sealing assembly includes a gasket 5, a packing 6, a first septum 7 and a second septum 8 arranged sequentially from bottom to top.

[0032] In this embodiment, the medium flow channel control function is achieved through the through-type valve core 4, and the sealing assembly adopts a four-layer progressive structure design. The gasket 5 provides the initial seal, the packing 6 fills the microscopic unevenness through plastic deformation, the first septum 7 disperses the axial pressure, and the second septum 8 provides support for the valve core 4. The multi-layer sealing structure can adapt to the positional displacement of the valve core 4 during movement, and under high polymer medium conditions, it can effectively prevent the molten medium from seeping and leaking along the gap between the valve core 4 and the guide part 301. Compared with the traditional single-layer packing 6 seal, this structure disperses the sealing pressure to different levels, which not only ensures the reliability of dynamic sealing, but also avoids premature failure of the seal caused by local stress concentration.

[0033] For example, in this embodiment, multiple second septa 8 may be provided to further enhance the support for the valve core 4.

[0034] For example, gasket 5 may be a metal spiral wound gasket or a graphite composite gasket, used to provide a basic seal and compensate for installation errors. Filler 6 is preferably made of flexible graphite or polytetrafluoroethylene, filling microscopic gaps through compression deformation. The first septum 7 and the second septum 8 are arranged in layers using non-metallic materials of different hardness, achieving pressure buffering through a hardness gradient distribution.

[0035] It is worth noting that the gasket 5 in this embodiment is a metal gasket, and a filler 6 is added to the metal gasket to prevent the medium from entering the filler 6 cavity of the upper valve cover 3. Even if a small amount of medium enters the first diaphragm 7, the first diaphragm 7 has enough space to accommodate the medium, and the first diaphragm 7 covers the area of ​​the heat-insulating medium, which can ensure that the polymer is completely melted. Even if it is not completely melted, the valve stem will not cause the valve to jam because there is no step during the valve opening process. Furthermore, the multiple fillers 6 between the valve cover 3 and the valve core 4 seal the gasket, ensuring that the medium does not leak out.

[0036] In an exemplary embodiment, the valve core 4 and the discharge channel 103 have a mating structure that can be used to open or seal the discharge channel 103. Specifically, the mating structure includes a valve seat 10 and a sealing head 402. The valve seat 10 is located at the end of the discharge channel 103 away from the medium cavity 101, and the sealing head 402 is located at the end of the valve core 4 near the discharge channel 103. The sealing head 402 has a first mating surface 4021, and the valve seat 10 has a second mating surface 1001. When the valve core 4 is away from the valve seat 10, the first mating surface 4021 separates from the second mating surface 1001, and the discharge channel 103 opens. When the valve core 4 is near the valve seat 10 and the sealing head 402 is pressed against the valve seat 10, the discharge channel 103 is sealed.

[0037] In this embodiment, sealing is achieved through axial compression of rigid contact surfaces. When the valve core 4 moves downward, the sealing head 402 and the valve seat 10 form a full-circumferential line contact or surface contact. The uniform distribution of contact pressure effectively prevents leakage of high-viscosity polymers. Precision machining of the mating surfaces ensures reliable sealing even under high operating pressure, while minimizing abrupt changes in the flow path during separation, reducing polymer flow resistance. Compared to traditional soft-seal structures, this design avoids the problem of opening and closing jamming caused by polymer adhesion to the sealing material, maintaining stable sealing performance under high-pressure conditions and extending valve service life. Specifically, the cooperation between the arc-shaped guide surface 104 and the oblique flow-guiding structure allows the medium to quickly leave the sealing area when the valve core 4 is lifted, avoiding secondary sealing failure.

[0038] In this embodiment, the valve seat 10 can be an integral metal processing part or a split assembly structure, and its second mating surface 1001 is a finely machined conical surface or a flat surface.

[0039] For example, the sealing head 402 is integrally formed with the valve core 4, and the first mating surface 4021 is designed as a conical or planar structure complementary to the second mating surface 1001. Specifically, a positioning step can be provided between the valve seat 10 and the discharge channel 103 to ensure assembly coaxiality; a hard alloy layer can be added to the end of the sealing head 402 to improve wear resistance.

[0040] For example, a bushing 9 is provided inside the discharge channel 103. The bushing 9 is located on the side of the valve seat 10 near the medium channel and is located on the inner wall of the discharge channel 103. The valve core 4 is provided with multiple spaced contact bodies 401. The outer edge of the contact body 401 can be used to contact and guide the bushing 9. In this embodiment, the bushing 9 and the multiple contact bodies 401 cooperate to form a distributed guiding structure. The bushing 9 provides continuous support as a fixed reference surface, and the multiple contact bodies 401 disperse and transmit the guiding force, effectively suppressing the radial sway of the valve core 4 during movement. Specifically, when the valve core 4 moves axially, each contact body 401 maintains sliding contact with the inner wall of the bushing 9 in sequence, and automatic centering is achieved through contact constraints at three or more points. The gap between the contact bodies 401 allows the medium to pass through, avoiding interference between the guiding structure and the medium flow. Thus, the straightness of the valve core 4 movement is ensured, and the smooth flow of the medium is maintained, solving the problem of easy jamming in traditional single-point guidance.

[0041] For example, the bushing 9 can be fixed to the inner wall of the discharge channel 103 by interference fit or threaded connection. The contact body 401 is an annular protrusion structure, equidistantly distributed along the axial direction of the valve core 4, and the number of contact bodies 401 is three. In a specific embodiment, the contact body 401 adopts a segmented design, and a single contact body 401 is composed of 3-4 continuous arc-shaped surfaces evenly distributed circumferentially.

[0042] Specifically, in this embodiment, when installing the bushing 9 and the valve seat 10, the bushing 9 is installed first. The bushing 9 is pushed from the bottom of the discharge channel 103 into the discharge channel 103 and abuts against the step inside the valve body 1. The bushing 9 and the discharge channel 103 are in an interference fit. Then, the valve seat 10 is pushed from the bottom of the discharge channel 103 to form a concave-convex fit. In the specific installation, the valve seat 10 and the discharge channel 103 are also in an interference fit to prevent the valve seat 10 from coming out. A combination gasket 11 is provided between the bushing 9 and the valve seat 10 to prevent them from contacting each other directly. Specifically, the combination gasket 11 is a toothed combination gasket 11.

[0043] It is worth noting that in this embodiment, the valve core 4 is guided from the bottom, that is, at the discharge channel 103. In contrast, the existing valve core 4 guiding structure is generally set between the valve cover 3 and the valve core 4, using an upper guide. However, the upper guide is prone to poor sealing and complex sealing mechanism between the valve core 4 and the valve cover 3. The lower guide simplifies the sealing structure while ensuring accurate guidance of the valve core 4, improves the sealing performance between the valve core 4 and the valve cover 3, and makes it less likely for the polymer to enter the gap between the valve core 4 and the valve cover 3 and cause blockage. This ensures the normal movement of the valve core 4 and improves the service life of the polymer control valve.

[0044] In one exemplary embodiment, at least a portion of the feed channel 102 is located within the insulation cavity 201, and at least a portion of the discharge channel 103 is located within the insulation cavity 201.

[0045] In this embodiment, by including key sections of the inlet and outlet channels 103 within the insulation range, the problem of insulation blind spots formed at the connection between the valve cover 3 and the valve body 1 in traditional structures is effectively solved. Specifically, the insulation design of the inlet channel 102 prevents high-viscosity polymers from solidifying and clogging due to temperature drops during the initial stage of conveying; the insulation treatment of the outlet channel 103 avoids phase change accumulation of the medium during the discharge stage. This structure allows the insulation medium to directly act on the polymer medium flowing through the channels, significantly shortening the preheating time when restarting the valve and eliminating the risk of opening and closing failures caused by local solidification. By optimizing the coverage of the insulation area, temperature control throughout the polymer conveying process is achieved while ensuring the structural strength of the valve.

[0046] In this embodiment, the heat-insulating cavity 201 can form a sealed space with the valve body 1 by welding or flange connection, and the heat-insulating medium can be selected as heat transfer oil, steam or other high-temperature fluid.

[0047] In an exemplary embodiment, the seat has a discharge hole 1002, and the diameter of the discharge hole 1002 gradually decreases and then gradually increases along the axial direction of the valve seat 10.

[0048] In this embodiment, through fluid dynamics optimization design, a flow channel structure that first contracts and then expands is formed in the discharge port 1002 of the valve seat 10. When the high-viscosity polymer medium flows through the contraction section, the shearing effect generated by the increased flow velocity can effectively prevent medium deposition; the expansion section reduces flow resistance and avoids eddy currents caused by sudden pressure drops. The resulting Venturi effect ensures the continuity of medium flow and reduces energy loss.

[0049] For example, in this embodiment, the upper end of the valve seat 10 is a conical constriction opening, and the lower end is a conical flare opening.

[0050] In summary, by completely placing the medium cavity 101 within the insulation cavity 201 and adopting a continuous insulation structure, this utility model achieves uniform insulation of all polymer media, improves the insulation effect, and enhances the service life of the valve and the reliability of system operation.

[0051] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A polymer regulating valve, characterized in that, include: The valve body has a medium cavity inside, and the valve body is provided with an inlet channel and an outlet channel, which are respectively connected to the medium cavity; A valve cover is disposed on the valve body, the valve body having a guide portion, at least a portion of the guide portion extending into the medium cavity; The insulation component includes an insulation shell disposed on the valve body, the insulation shell forming an insulation cavity, and the medium cavity located within the insulation cavity.

2. The polymer regulating valve according to claim 1, characterized in that: The discharge channel is located at the bottom of the valve body, and the inner wall of the medium cavity is a circular arc guide surface, which can be used to guide the medium in the medium cavity to the discharge channel.

3. The polymer regulating valve according to claim 1, characterized in that: The outer wall of the guide is inclined, and the diameter of the guide gradually decreases along the extension direction from the valve cover to the discharge channel. At least part of the outer wall of the guide is positioned opposite the feed channel.

4. The polymer regulating valve according to claim 1, characterized in that: The valve cover is provided with a valve core, which passes through the valve cover and the medium cavity and enters the discharge channel. A sealing assembly is provided between the valve core and the guide portion. The sealing assembly includes a gasket, a packing, a first septum and a second septum arranged sequentially from bottom to top.

5. The polymer regulating valve according to claim 4, characterized in that: The valve core and the discharge channel have a mating structure, which can be used to open or seal the discharge channel.

6. The polymer regulating valve according to claim 5, characterized in that: The mating structure includes a valve seat and a sealing head. The valve seat is located at the end of the discharge channel away from the medium cavity, and the sealing head is located at the end of the valve core near the discharge channel. The sealing head has a first mating surface, and the valve seat has a second mating surface. When the valve core moves away from the valve seat, the first mating surface and the second mating surface separate, and the discharge channel opens. When the valve core moves close to the valve seat and the sealing head presses against the valve seat, the discharge channel is sealed.

7. The polymer regulating valve according to claim 6, characterized in that: The discharge channel is provided with a bushing, which is located on the side of the valve seat near the medium channel. The valve core is provided with a plurality of spaced contact bodies, the outer edge of which can be used to guide contact with the bushing.

8. The polymer regulating valve according to claim 1, characterized in that: At least a portion of the feed channel is located within the insulation cavity, and at least a portion of the discharge channel is located within the insulation cavity.

9. The polymer regulating valve according to claim 6, characterized in that: The valve seat has a discharge hole, and along the axial direction of the valve seat, the diameter of the discharge hole gradually decreases and then gradually increases.

10. The polymer regulating valve according to claim 1, characterized in that: The insulation component also includes a connecting flange, which is disposed on the insulation shell and is used to introduce insulation medium into the insulation cavity.

Images