Heat-resistant plastic regulating valve

Abstract

The utility model discloses a heat-resistant plastic regulating valve which comprises a valve body, a valve element assembly is arranged in a valve cavity of the valve body and comprises a valve element shell and a valve ball arranged in the valve element shell, the top of the valve ball is connected with a valve rod, the valve rod penetrates through the valve element shell and then extends into a mounting base on the top of the valve body, a wrench is mounted on the mounting base, and the wrench is connected with the top of the valve rod in a fastened mode. In the flow guide direction of the valve body, flow guide holes are formed in the two ends of the valve element shell correspondingly, and a through flow guide channel is formed in the valve ball. When the valve ball rotates in the valve element shell, the flow guide channel in the valve ball and the flow guide hole in the valve element shell are aligned or staggered, and therefore fluid can be conducted or cut off. The regulating valve is made of heat-resistant plastic, so that the regulating valve has the advantages of light weight and relatively low heat conductivity, meanwhile, the valve ball is wrapped by the valve element shell, the problem of over-clinging between the valve ball and the valve cavity caused by thermal expansion and cold contraction in the injection molding machining process can be avoided, and opening and closing operation is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of valves, and particularly to a heat-resistant plastic regulating valve that can be installed on a heating pipeline to regulate the pipeline flow rate. Background Art

[0002] With the growth of urban heating demand, plastic valves are gradually increasing in application in heating pipelines due to their characteristics such as corrosion resistance, light weight, and low maintenance cost. A regulating valve is an important component for regulating the pipeline flow rate in a heating pipeline. For example, Chinese Utility Model Patent CN201820814603.9 discloses a valve body structure for regulating water volume, that is, a pipeline flow regulating valve, which includes a water volume valve seat, an inlet chamber, a regulating valve body, a regulating rod, a micro hydraulic cylinder, and a support rod. An inlet chamber is provided inside the water volume valve seat. One side of the water volume valve seat is connected to an inlet pipe, and the lower end of the water volume valve seat is connected to an outlet pipe. Both the inlet pipe and the outlet pipe are communicated with the inlet chamber. A water outlet hole is opened on the water volume valve seat below the inlet chamber. A regulating valve body is installed inside the inlet chamber. A support rod is welded on the upper side of the water volume valve seat. A micro hydraulic cylinder is fixedly installed on the lower side of one end of the support rod. The lower output end of the micro hydraulic cylinder is drivingly connected to a regulating rod. The lower end of the regulating rod penetrates through the water volume valve seat and is fixedly connected to the middle part of one side of the regulating valve body. The valve body structure for regulating water volume disclosed in the above literature can set the water output into three gears by correspondingly installing a first valve head, a second valve head, and a third valve head at one end of the regulating valve seat corresponding to the water outlet hole, and the lengths of the first valve head, the second valve head, and the third valve head increase in sequence. By driving the regulating rod downward through the micro hydraulic cylinder, the control adjustment of the water output is realized by controlling one side of the first valve head, the second valve head, and the third valve head to insert into the water outlet hole.

[0003] Although the valve body structure for regulating water volume disclosed in the above patent literature is simple and reasonable, easy to manufacture, and convenient to use, however, traditional regulating valves still have the following problems in application:

[0004] Traditional regulating valves are basically made of metal materials. They are prone to corrosion in high-temperature or humid environments, especially regulating valves made of iron and steel materials without anti-corrosion treatment. In addition, metal valves are heavy in weight and high in thermal conductivity, which may cause heat loss or overheating, affecting the energy efficiency of the system. Therefore, there are still many problems in the application of traditional regulating valves. For this reason, it is necessary to propose a new technical solution to solve the problems existing in the prior art. Summary of the Utility Model

[0005] The present application provides a heat-resistant plastic regulating valve that can be adapted to be installed on a heating pipeline to solve the problems that traditional regulating valves made of metal materials are heavy in weight, prone to corrosion and scale formation, and have a high thermal conductivity, resulting in relatively large heat loss in the system.

[0006] To achieve the above object, the present application provides the following technical solutions:

[0007] The present application provides a heat-resistant plastic control valve, including a valve body. Water inlet ports and water outlet ports are respectively formed at two ends of the valve body. A valve cavity is provided in the valve body. The valve cavity is respectively communicated with the water inlet port and the water outlet port. A valve core assembly is arranged in the valve cavity. The valve core assembly includes a valve core housing and a valve ball arranged in the valve core housing. The top of the valve ball is connected to a valve rod. The valve rod penetrates through the valve core housing and extends into a mounting seat at the top of the valve body. A mounting groove for mounting a wrench is formed on the mounting seat. The wrench is firmly connected to the top of the valve rod. Along the flow direction of the fluid in the valve body, diversion holes are respectively formed at two ends of the valve core housing, and a through diversion channel is formed on the valve ball.

[0008] In the above technical solution, further, the valve core housing includes a housing body and a cover plate covering one end of the housing body. The housing body includes a ring of side walls and a bottom wall connected to one end of the side walls. A clamping groove is formed at the other end of the side walls. The cover plate is adaptively connected to the clamping groove. The cover plate and the bottom wall are oppositely arranged, and diversion holes are respectively arranged on the cover plate and the bottom wall.

[0009] Furthermore, the outer wall of the valve core housing is tightly and adaptively connected to the inner wall of the valve cavity. Sealing rings are respectively arranged at two ends of the valve cavity. A fitting gap is formed between the inner wall of the valve core housing and the outer wall of the valve ball.

[0010] Furthermore, a connection hole seat allowing the valve rod to pass through is formed on the side wall of the housing body. An O-ring is arranged on the valve rod. The O-ring is used to seal the valve rod and the connection hole seat.

[0011] Further, the cross-sectional shape of the diversion channel formed in the valve ball is a triangle with one side being an arc. The arc is oppositely arranged to one of the sharp corners of the triangle shape, and the arc bends away from the sharp corner.

[0012] Furthermore, along the direction from the water inlet port to the water outlet port, the cross-sectional area of the diversion channel gradually decreases.

[0013] Further, the wrench includes a connecting end cap and wing plates oppositely arranged on both sides of the connecting end cap. A convex ring adapted to be clamped with the mounting groove on the mounting seat at the top of the valve body is formed on the connecting end cap. A fastening mounting hole is arranged in the middle of the connecting end cap. A fastening screw is arranged in the fastening mounting hole. The wrench is firmly connected to the top of the valve rod through the fastening screw.

[0014] Furthermore, a decorative cover is arranged at the end of the fastening mounting hole facing away from the valve body. The decorative cover is detachably connected to the wrench.

[0015] Furthermore, a rotation indicating arrow and a switch position text mark are arranged on the end face of the connecting end cap facing away from the valve body.

[0016] Furthermore, the valve body, the spool assembly, the valve stem, and the wrench are all made of polyethylene material.

[0017] Compared with the prior art, the present application has at least the following beneficial effects:

[0018] 1. Based on further analysis and research of the problems in the prior art, it is recognized that the regulating valve made of traditional metal materials has problems such as heavy weight, easy corrosion and scaling, and high thermal conductivity, resulting in relatively large heat loss in the system. Therefore, the present application provides a heat-resistant plastic regulating valve, which includes a valve body and a spool assembly disposed in the valve cavity. The spool assembly includes a spool housing and a valve ball. The spool housing wraps the valve ball, reducing the over-tight fit between the valve ball and the sealing ring caused by thermal expansion and contraction during the injection molding process, enabling the valve ball to move relatively freely at different temperatures, reducing the torque of the opening and closing operation. Moreover, the present application uses heat-resistant plastic to manufacture the regulating valve, which is corrosion-resistant, not easy to scale, light in weight, and low in maintenance cost. Compared with the regulating valve made of traditional metal materials, the heat-resistant plastic regulating valve provided by the present application has a relatively low thermal conductivity, which can reduce the system heat loss.

[0019] 2. The liquid flowing into the valve body from the water inlet port flows through the spool assembly to the water outlet port. Therefore, the rotation of the valve ball directly affects the flow state of the fluid. When the valve ball rotates in the spool housing, the flow guiding channels on the valve ball are aligned or staggered with the flow guiding holes on the spool housing, thereby realizing the conduction or cut-off of the fluid. The valve stem of the heat-resistant plastic regulating valve provided by the present application is connected to the wrench at the top of the valve body, and the user can easily perform the opening and closing operations.

[0020] 3. The regulating valve provided by the present application uses heat-resistant plastic, such as polyethylene. The selection of this material not only allows the valve to work normally at high temperatures, but also improves the durability of the overall structure and reduces the performance degradation caused by material aging.

[0021] 4. The design of the spool housing in the regulating valve provided by the present application can not only reduce the over-tight fit between the valve ball and the sealing ring caused by thermal expansion and contraction, but also better ensure the sealing performance of the valve cavity of the valve body through the spool housing, reduce the leakage risk, and improve the use safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. It should be understood that the specific shapes and structures shown in the drawings generally should not be regarded as limiting conditions when implementing the present application. For example, those skilled in the art are capable of making routine adjustments or further optimizations to the addition / deletion / attribution division, specific shapes, positional relationships, connection methods, dimensional proportional relationships, etc. of certain units (components) based on the technical concepts disclosed in the present application and the exemplary drawings.

[0023] Figure 1 It is a front view structural schematic diagram of a valve provided in an embodiment of the present application;

[0024] Figure 2 It is a top view structural schematic diagram of a valve provided in an embodiment of the present application;

[0025] Figure 3 It is Figure 2 a cross-sectional structural schematic diagram of the A-A section in

[0026] Figure 4 It is a structural schematic diagram of the assembled spool housing in the present application in an embodiment;

[0027] Figure 5 It is a structural schematic diagram of the valve ball in the present application in an embodiment;

[0028] Figure 6 It is Figure 5 a cross-sectional structural schematic diagram of the B-B section in , mainly showing the shape of the diversion channel in the valve ball.

[0029] Explanation of reference numerals:

[0030] 1, valve body; 2, cover plate; 3, housing; 4, valve ball; 5, sealing ring; 6, O-ring; 7, wrench; 8, valve stem; 9, fastening screw; 10, decorative cover; 11, spool housing; 12, diversion channel; 13, water inlet port; 14, water outlet port. Specific embodiments

[0031] The following will further elaborate on the present application through specific embodiments in conjunction with the drawings.

[0032] In the description of the present application: Unless otherwise specified, "a plurality of" means two or more. The expressions such as "including", "comprising", and "having" in the present application also mean "not limited to" (certain units, components, materials, steps, etc.).

[0033] Terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually for the convenience of intuitive understanding with reference to the accompanying drawings, rather than absolute limitations on the positional relationships in the actual product. Without departing from the technical concept disclosed in this application, changes in these relative positional relationships shall also be regarded as falling within the scope of the expression of this application.

[0034] This application provides a heat-resistant plastic regulating valve, which can be used as an important component of a heat pipe network in a heating pipeline. By adjusting the opening degree of the valve, the flow rate in the heat pipe network can be adjusted. The heat-resistant plastic regulating valve provided in this application adopts a fully plastic design and is injection-molded in one step, with the advantages of corrosion resistance, scale prevention, small torque, and long service life. The following will describe in detail the specific structural composition of the heat-resistant plastic regulating valve with reference to the accompanying drawings and specific embodiments.

[0035] See Figure 1 , the heat-resistant plastic regulating valve provided in this embodiment mainly includes a valve body 1, and water inlet ports 13 and water outlet ports 14 are respectively formed at the left and right ends of the valve body 1. See Figure 3 , 4 , a valve cavity is provided in the valve body 1, the valve cavity is respectively communicated with the water inlet port 13 and the water outlet port 14, a valve core assembly is arranged in the valve cavity, the valve core assembly includes a valve core housing 11 and a valve ball 4 arranged in the valve core housing 11, the top of the valve ball 4 is connected to a valve rod 8, the valve rod 8 passes through the valve core housing 11 and extends into the mounting seat at the top of the valve body 1, a mounting groove for mounting a wrench 7 is formed on the mounting seat, and the wrench 7 is firmly connected to the top of the valve rod 8; along the flow direction of the valve body 1, diversion holes are respectively opened at both ends of the valve core housing 11, and a through diversion channel 12 is opened on the valve ball 4.

[0036] When the wrench 7 drives the valve ball 4 to rotate to the open position through the valve rod 8, the diversion channel 12 on the valve ball 4, the diversion holes at both ends of the valve core housing 11, and the water inlet port 13 and the water outlet port 14 at both ends of the valve body 1 are communicated to form a water passage of the valve. When the wrench 7 drives the valve ball 4 to rotate to the closed position through the valve rod 8, the diversion channel 12 on the valve ball 4 is misaligned with the diversion holes at both ends of the valve core housing 11, realizing the cut-off of the water passage of the valve.

[0037] In the heat-resistant plastic regulating valve provided in this embodiment, a valve core housing 11 is arranged between the valve ball 4 and the valve cavity, and the valve core housing 11 wraps the valve ball 4. During valve processing, the valve ball 4 and the valve core housing 11 can be first assembled to obtain a valve core assembly, such as Figure 4 , and then the assembled valve core assembly is placed in an injection molding machine to integrally injection mold the valve body structure outside the valve core assembly. This can reduce the over-tight fit between the valve ball 4 and the sealing ring caused by thermal expansion and contraction, so that the valve ball 4 can maintain relatively free movement at different temperatures, and reduce the torque of the opening and closing operations.

[0038] In a preferred embodiment of the present application, refer to Figure 3 , the above-mentioned valve core housing 11 mainly includes a housing 3 and a cover plate 2 covering one end of the housing 3. Specifically, the housing 3 includes a circular side wall and a bottom wall connected to one end of the side wall. The housing 3 is cylindrical, and the inner diameter of the housing 3 is adapted to the outer diameter of the valve ball 4. A clamping groove is provided on the end surface at the other end of the side wall. The clamping groove is a circular groove recessed outward from the inner surface of the side wall. The cover plate 2 is adaptively installed in the clamping groove and is arranged opposite to the bottom wall. Flow guiding holes are respectively provided on the cover plate 2 and the bottom wall of the valve core outer cover. The flow guiding hole on the cover plate 2 is communicated with the water inlet port 13 of the valve body 1, and the flow guiding hole on the bottom wall is communicated with the water outlet port 14 of the valve body 1. A fitting gap is formed between the inner wall of the valve core housing 11 and the outer wall of the valve ball 4. The outer wall of the valve core housing is tightly and adaptively connected to the inner wall of the valve cavity. Sealing rings are respectively provided at both ends of the valve cavity. In the specific processing process, the valve body structure is injection-molded on the outside of the valve core housing 11 through integral injection molding. Therefore, the outer wall of the valve core housing 11 is tightly and adaptively connected to the inner wall of the valve cavity.

[0039] In a preferred embodiment of the present application, a connection hole seat allowing the valve rod 8 to pass through is formed on the side wall of the housing 3. A plurality of installation grooves for installing O-ring seals are provided on the valve rod. The O-ring seals are used to seal the valve rod and the connection hole seat, and the installation grooves can ensure the fixed position of the O-ring seals and prevent them from shifting. The present application can ensure the sealing performance between the valve rod 8 and the valve core housing 11 through the O-ring seals, and has the function of preventing leakage. In the specific structural installation, 3 O-ring seals can be provided on the valve rod, 2 of which can seal with the valve core, and 1 can seal with the valve body.

[0040] In a preferred embodiment of the present application, refer to Figure 3 , the valve rod 8 passes through the valve core housing 11 and extends into the installation seat at the top of the valve body 1. An O-ring seal 6 is also provided in the seat hole of the installation seat to ensure the connection sealing performance between the valve rod 8 and the valve body 1.

[0041] In a preferred embodiment of the present application, refer to Figure 5 、 6 , the cross-sectional shape of the flow guiding channel 12 opened in the valve ball 4 is a triangle with one side being an arc. The arc is arranged opposite to one sharp angle of the triangle shape, and the arc bends away from the sharp angle. And along the direction from the water inlet port 13 to the water outlet port 14 of the valve body 1, the cross-sectional area of the flow guiding channel 12 gradually decreases. Compared with the traditional cylindrical flow guiding channel 12 with the same size at both ends, this kind of triangular-like flow guiding channel 12 with a large inlet and a small outlet can play a better role in flow regulation.

[0042] In a preferred embodiment of the present application, refer to Figure 3, the above-mentioned wrench 7 includes a connecting end cap and wing plates oppositely arranged on both sides of the connecting end cap. A convex ring adapted to be snap-fitted with the mounting groove on the top mounting seat of the valve body 1 is formed on the connecting end cap. A fastening mounting hole is provided in the middle of the connecting end cap, and a fastening screw 9 is arranged in the fastening mounting hole. The wrench 7 is fixedly connected to the top of the valve stem 8 through the fastening screw 9. During use, by rotating the wing plates on the wrench 7, the valve ball 4 can be driven to rotate through the valve stem 8 to perform the operations of opening and closing the valve and adjusting the opening degree.

[0043] In a preferred embodiment of the present application, a decorative cover 10 can be provided on the connecting end cap of the wrench 7 to seal the fastening mounting hole through the decorative cover 10, playing a role in dust and water prevention.

[0044] In a preferred embodiment of the present application, a rotation indication arrow and a switch position text mark can be provided on the end face of the connecting end cap facing away from the valve body 1 to play a prompting role for the convenience of the staff to operate.

[0045] In a preferred embodiment of the present application, the valve body 1, the valve core assembly, the valve stem 8, and the wrench 7 are all made of high-temperature-resistant polyethylene material. The heat-resistant plastic regulating valve provided by the present application adopts a fully plastic design and is connected to the pipeline by hot melt socket connection. Therefore, in addition to high-temperature-resistant polyethylene material, other plastic materials with high-temperature resistance characteristics can also be used, such as polypropylene, fluoroplastics, etc.

[0046] In summary, the present application provides a heat-resistant plastic regulating valve for heating equipment. Compared with the traditional metal regulating valve, the present application uses heat-resistant plastic to make the regulating valve. Therefore, it is light in weight, corrosion-resistant, not easy to scale, and has a relatively low thermal conductivity, which can reduce the system heat loss; further, the heat-resistant plastic regulating valve provided by the present application wraps the valve ball through the valve core housing, which can reduce the over-tight fit between the valve ball and the sealing ring caused by thermal expansion and contraction during the injection molding process, so that the valve ball can move relatively freely at different temperatures, reducing the torque of the opening and closing operations, and better ensuring the sealing performance of the valve cavity of the valve body through the valve core housing, reducing the leakage risk, and improving the use safety and reliability.

[0047] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written out should also be considered to be within the scope described in this specification.

[0048] In the foregoing, the present application has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be understood that based on the technical concept of the present application, several conventional adjustments or further innovations can also be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained from these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. A heat-resistant plastic control valve, comprising a valve body, wherein two ends of the valve body respectively form a water inlet port and a water outlet port, a valve cavity is arranged in the valve body, and the valve cavity is respectively communicated with the water inlet port and the water outlet port, and is characterized in that, A spool assembly is arranged in the valve cavity. The spool assembly includes a spool housing and a valve ball arranged inside the spool housing. The top of the valve ball is connected to a valve rod. The valve rod passes through the spool housing and extends into a mounting seat at the top of the valve body. A mounting groove for mounting a wrench is formed on the mounting seat. The wrench is firmly connected to the top of the valve rod. Along the flow direction of the valve body, diversion holes are respectively formed at both ends of the spool housing, and a through diversion channel is formed on the valve ball.

2. The heat-resistant plastic regulating valve according to claim 1, characterized in that, The spool housing includes a housing body and a cover plate covering one end of the housing body. The housing body includes a ring of side walls and a bottom wall connected to one end of the side walls. A clamping groove is formed at the other end of the side walls. The cover plate is adaptively connected to the clamping groove. The cover plate and the bottom wall are oppositely arranged, and diversion holes are respectively formed on the cover plate and the bottom wall.

3. The heat-resistant plastic regulating valve according to claim 2, wherein The outer wall of the spool housing is tightly and adaptively connected to the inner wall of the valve cavity. Sealing rings are respectively arranged at both ends of the valve cavity. A fitting gap is formed between the inner wall of the spool housing and the outer wall of the valve ball.

4. The heat-resistant plastic regulating valve according to claim 2 or 3, characterized in that, A connection hole seat allowing the valve rod to pass through is formed on the side wall of the housing body. An O-ring is arranged on the valve rod, and the O-ring is used for sealing the valve rod and the connection hole seat.

5. The heat-resistant plastic regulating valve according to claim 1, characterized in that, The cross-sectional shape of the diversion channel formed in the valve ball is a triangle with one side being an arc. The arc is oppositely arranged to one sharp angle of the triangle shape, and the arc bends away from the sharp angle.

6. The heat-resistant plastic regulating valve according to claim 5, characterized in that, Along the direction from the water inlet port to the water outlet port, the cross-sectional area of the diversion channel gradually decreases.

7. The heat-resistant plastic regulating valve according to claim 1, wherein, The wrench includes a connecting end cap and wing plates oppositely arranged on both sides of the connecting end cap. A convex ring adapted to be clamped with the mounting groove on the mounting seat at the top of the valve body is formed on the connecting end cap. A fastening mounting hole is arranged in the middle of the connecting end cap. A fastening screw is arranged in the fastening mounting hole. The wrench is firmly connected to the top of the valve rod through the fastening screw.

8. The heat-resistant plastic regulating valve according to claim 7, characterized in that, A decorative cover is arranged at the end of the fastening mounting hole facing away from the valve body. The decorative cover is detachably connected to the wrench. A rotation indication arrow and a switch position text mark are arranged on the end face of the connecting end cap facing away from the valve body.

9. The heat-resistant plastic regulating valve according to claim 1, characterized in that, The valve body, the spool assembly, the valve rod and the wrench are all made of polyethylene material.

Images