PEI needle valve

Abstract

The utility model discloses a PEI (polyetherimide) needle valve, which belongs to the field of needle valves and comprises a needle valve component, the needle valve component comprises a splitter plate, a heat insulation plate is mounted at the upper end of the splitter plate, a heating tube is connected between the splitter plate and the heat insulation plate, two valve needle bodies are mounted in the splitter plate, and first valve sleeves are connected to the upper ends of the two valve needle bodies. The lower end of the splitter plate is provided with the two hot nozzle bodies, the lower ends of the two hot nozzle bodies are both provided with the hot nozzle gate, the upper end of the splitter plate is provided with the injection mechanism, and the upper end of the first valve sleeve is provided with the second valve sleeve. And meanwhile, the temperature can be controlled while the heat preservation effect is achieved, so that blackening or color mixing of the needle valve structure can be avoided, and the use effect of the needle valve can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of needle valves, specifically a PEI needle valve. Background Technology

[0002] A PEI needle valve is a needle-shaped valve made of polyetherimide material. It has on / off function and the ability to precisely regulate flow. It controls the flow rate of fluid by adjusting the distance between a slender needle-shaped valve core and the valve seat. Needle valves are commonly used in applications requiring precise flow control and regulation, especially under low flow rate and high pressure differential conditions. The main characteristic of a needle valve is that the valve core tip is slender and sharp, resembling a needle, hence the name needle valve. Existing needle valves are molded at temperatures of 360-380 degrees Celsius, resulting in a narrow molding range, susceptibility to blackening and color mixing, and strong abrasive corrosion, thus affecting the performance. Therefore, it is necessary to provide a PEI needle valve that avoids blackening and color mixing and has corrosion resistance. Utility Model Content

[0003] This invention provides a PEI needle valve, aiming to solve the problems of existing PEI needle valves, such as narrow molding range, easy blackening and color mixing, and strong abrasive corrosion.

[0004] To achieve the above objectives, this utility model provides a PEI needle valve, including a needle valve assembly;

[0005] The needle valve assembly includes a flow divider plate, an insulation plate installed on the upper end of the flow divider plate, a heating tube connected between the flow divider plate and the insulation plate, two valve needle bodies installed inside the flow divider plate, a first valve sleeve connected to the upper end of each of the two valve needle bodies, two hot nozzle bodies installed at the lower end of the flow divider plate, a hot nozzle nozzle fitting provided at the lower end of each of the two hot nozzle bodies, an injection mechanism installed at the upper end of the flow divider plate, and a second valve sleeve installed at the upper end of the first valve sleeve.

[0006] As a preferred embodiment of this utility model, the injection mechanism includes two cylinders installed on the upper end of the second valve sleeve, and an injection nozzle is installed on the upper end of the flow divider plate.

[0007] As a preferred embodiment of this utility model, a fastening plate is provided at the front end of the diverter plate, and a plurality of diverter plate connectors are installed on the surface of the fastening plate.

[0008] As a preferred embodiment of this utility model, one side of the hot nozzle body is connected to an air outlet, and both the upper and lower ends of the diverter plate are threaded with several fastening bolts.

[0009] In a preferred embodiment of this utility model, both the diversion plate and the insulation plate are made of cast copper.

[0010] As a preferred scheme of the utility model, the valve needle body is made of PEI resin material, and the surface of the hot nozzle rubber joint is coated with a DLC coating.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1、the needle valve structure in use, first through the injection mechanism in the cylinder cooperation injection needle can be melt material injection operation, at this time, the shunt with heating tube and heat preservation plate and the valve needle body made of PEI resin material not only can play the heat preservation effect, can isolate heat simultaneously, avoid the needle valve blackening and color mixing due to temperature is too high, cooperate with the hot nozzle body, hot nozzle rubber joint and the DLC coating on the surface thereof can expand the forming range, the first valve sleeve and the second valve sleeve can improve the sealing effect of the needle valve, compared with the needle valve structure in the prior art, the utility model can expand the forming range, avoid the needle valve blackening and color mixing through the above-mentioned structure cooperation, and then can guarantee the use effect of needle valve structure. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the whole structure schematic diagram of the utility model;

[0014] Fig. 2 It is the needle valve assembly structure exploded view of the utility model.

[0015] In the drawing: 100, needle valve assembly;101, shunt plate;102, heating tube;103, heat preservation plate;104, valve needle body;105, first valve sleeve;106, hot nozzle body;107, hot nozzle rubber joint;108, injection mechanism;109, second valve sleeve;1081, cylinder;1082, injection nozzle;111, fastening plate;112, shunt plate joint;121, air outlet nozzle;122, fastening bolt. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0017] Please refer to Figs. 1-2 The utility model provides a kind of PEI needle valve, including needle valve assembly 100;

[0018] The needle valve assembly 100 comprises a distribution plate 101, the upper end of the distribution plate 101 is provided with a heat preservation plate 103, the heat preservation plate 103 is connected between the distribution plate 101 and the heat preservation plate 103, the inside of the distribution plate 101 is provided with two valve needle bodies 104, the upper end of each of the two valve needle bodies 104 is connected with a first valve sleeve 105, the lower end of the distribution plate 101 is provided with two hot nozzle bodies 106, the lower end of each of the two hot nozzle bodies 106 is provided with a hot nozzle rubber mouth 107, the upper end of the distribution plate 101 is provided with an injection mechanism 108, and the upper end of the first valve sleeve 105 is provided with a second valve sleeve 109.

[0019] In a specific embodiment, the needle valve assembly 100 can not only expand the forming range of the needle valve, but also control the temperature while achieving the heat preservation effect, thereby avoiding the blackening or color mixing of the needle valve structure, and further ensuring the use effect of the needle valve. During use, the injection mechanism 108 can facilitate the injection operation of the molten liquid. At this time, the distribution plate 101 cooperates with the heat preservation plate 103 and the heat preservation plate 103 to improve the overall heat preservation effect of the needle valve assembly 100, and the heat is blocked to achieve the effect of temperature control, thereby avoiding the blackening or color mixing of the needle valve structure. At the same time, the hot nozzle body 106 cooperates with the hot nozzle rubber mouth 107 and the DLC coating on the surface thereof to expand the forming range, and the first valve sleeve 105 cooperates with the second valve sleeve 109 to ensure the sealing property of the needle valve. The above-mentioned structures cooperate with each other to ensure the use effect of the needle valve.

[0020] Referring to Fig. 2 , the injection mechanism 108 comprises two air cylinders 1081 mounted on the upper end of the second valve sleeve 109, and the upper end of the distribution plate 101 is provided with an injection nozzle 1082.

[0021] In a specific embodiment, the air cylinder 1081 cooperates with the injection nozzle 1082 to facilitate the continuous injection operation of the molten material, so as to improve the use fluency of the needle valve.

[0022] Referring to Fig. 2 , the front end of the distribution plate 101 is provided with a fastening plate 111, and the surface of the fastening plate 111 is provided with a plurality of distribution plate connectors 112.

[0023] In a specific embodiment, the fastening plate 111 cooperates with the distribution plate connector 112 to enhance the installation stability and disassembly convenience of the distribution plate 101.

[0024] Referring to Fig. 2 , one side of one of the hot nozzle bodies 106 is connected with an air outlet nozzle 121, and the upper and lower ends of the distribution plate 101 are both threadedly connected with a plurality of fastening bolts 122.

[0025] Specifically, one embodiment, the air outlet 121 is convenient for pressure relief and heat dissipation operation, while the fastening bolt 122 can enhance the overall threaded connection fastening strength of the needle valve assembly 100.

[0026] Please refer to Fig. 2 , the shunt plate 101 and the heat preservation plate 103 are made of cast copper.

[0027] Specifically, one embodiment, the shunt plate 101 and the heat preservation plate 103 made of cast copper can improve the heat conduction effect, so as to control the temperature while playing the heat preservation effect.

[0028] Please refer to Fig. 2 , the valve needle body 104 is made of PEI resin material, and the surface of the hot nozzle mouthpiece 107 is coated with DLC coating.

[0029] Specifically, one embodiment, the valve needle body 104 made of PEI resin has the effect of preventing corrosion and discoloration, and the DLC coating can prevent the hot nozzle mouthpiece 107 from blackening and mixing color.

[0030] Working principle: in use, first, through the injection mechanism 108 can facilitate the injection operation of the molten liquid, at the same time, through the shunt plate 101 cooperate with the heating tube 102 and the heat preservation plate 103 can not only improve the overall heat preservation effect of the needle valve assembly 100, but also can block the heat to achieve the effect of temperature control, so as to avoid the blackening or mixing color of the needle valve structure, then through the hot nozzle body 106 cooperate with the hot nozzle mouthpiece 107 and the DLC coating on its surface can expand the forming range, and then can ensure the use effect of the needle valve.

[0031] It should be noted that in this paper, such as first and second relationship terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0032] Although the embodiments of the present application have been shown and described, it is understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A PEI needle valve, characterized in that, include: A needle valve assembly (100) includes a flow divider plate (101), an insulation plate (103) is installed on the upper end of the flow divider plate (101), a heating tube (102) is connected between the flow divider plate (101) and the insulation plate (103), two valve needle bodies (104) are installed inside the flow divider plate (101), a first valve sleeve (105) is connected to the upper end of each of the two valve needle bodies (104), two hot nozzle bodies (106) are installed on the lower end of the flow divider plate (101), a hot nozzle nozzle valve (107) is provided on the lower end of each of the two hot nozzle bodies (106), an injection mechanism (108) is installed on the upper end of the flow divider plate (101), and a second valve sleeve (109) is installed on the upper end of the first valve sleeve (105).

2. The PEI needle valve according to claim 1, characterized in that: The injection mechanism (108) includes two cylinders (1081) mounted on the upper end of the second valve sleeve (109), and an injection nozzle (1082) is mounted on the upper end of the flow divider (101).

3. A PEI needle valve according to claim 1, characterized in that: The front end of the diverter plate (101) is provided with a fastening plate (111), and a plurality of diverter plate connectors (112) are installed on the surface of the fastening plate (111).

4. A PEI needle valve according to claim 1, characterized in that: One of the hot nozzle bodies (106) is connected to an air outlet (121) on one side, and the upper and lower ends of the diverter plate (101) are threaded with several fastening bolts (122).

5. A PEI needle valve according to claim 1, characterized in that: Both the diversion plate (101) and the insulation plate (103) are made of cast copper.

6. A PEI needle valve according to claim 1, characterized in that: The valve needle body (104) is made of PEI resin material, and the surface of the hot nozzle (107) is coated with DLC coating.

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