Valve cone of needle valve

Abstract

The utility model discloses a valve cone of a needle valve, which comprises a cone head and a cone rod, the front end of the cone rod is provided with external threads, the cone head is provided with internal threads matched with the external threads of the cone rod, the cone head is provided with a limit rod, the lower end of the limit rod extends into the cone rod, and the lower end of the limit rod extends into the cone rod. A first sealing layer is arranged at the position, at the top of the limiting rod, of the conical head, and a second sealing layer is arranged between the conical rod and the conical head. Compared with the prior art, the conical head and the conical rod are connected and combined into a whole through the threads, and the conical rod is clamped through the limiting rod in the conical head, so that the conical rod is prevented from loosening and falling off. And compared with an integrated structure, the processing cost and the material cost are reduced. And secondly, the first sealing layer and the second sealing layer are adopted, water can be prevented from permeating the connecting position, and the structural strength of the valve cone can be improved.

Description

Technical Field

[0001] This utility model relates to the field of cone valve manufacturing technology, and in particular to a valve cone for a needle valve. Background Technology

[0002] The valve cone of a needle valve is its core regulating component, used to precisely control fluid flow. The valve cone consists of a cone head and a cone rod. Due to its large overall length, if a one-piece forging process is used, not only is the forming process more difficult, but the machining time is also significantly increased, resulting in higher processing and material costs. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] Based on this, the present invention proposes a valve cone for a needle valve to solve the problems of difficult processing and high cost of the existing valve cone with an integrated structure.

[0005] (II) Technical Solution

[0006] To overcome or at least partially solve the above problems, this utility model provides a valve cone for a needle valve, including a cone head and a cone rod. The front end of the cone rod is provided with an external thread, and the cone head is provided with an internal thread that matches the external thread of the cone rod. A limiting rod is provided on the cone head, and the lower end of the limiting rod extends into the cone rod. A first sealing layer is provided at the top position of the limiting rod on the cone head, and a second sealing layer is provided between the cone rod and the cone head.

[0007] Preferably, the limiting rod is inserted into the cone head, and the lower end of the limiting rod is engaged in the slot of the cone rod.

[0008] Preferably, the limiting rod includes a head and a rod portion, wherein the diameter of the head is larger than the diameter of the rod portion.

[0009] Preferably, the limiting rod has an upper section and a lower section, the diameter of the lower section is larger than the diameter of the upper section, and the lower section is engaged in the groove of the tapered rod.

[0010] Preferably, the cone head includes a cone body and a cone tip, the cone rod is threadedly connected to the cone body, and the limiting rod is located in the radial direction of the cone body.

[0011] Preferably, the outer side of the second sealing layer is a slope.

[0012] Preferably, both the first sealing layer and the second sealing layer are welded layers.

[0013] Preferably, a welding groove is provided between the cone rod and the cone head, and the second sealing layer is fixed in the welding groove.

[0014] Preferably, the weld layer is made of stainless steel.

[0015] (III) Beneficial Effects

[0016] The valve cone of the needle valve of this utility model has the following advantages:

[0017] In this invention, the cone head and cone rod are connected as a single unit by a threaded connection. A limiting rod inside the cone head holds the cone rod in place, preventing it from loosening and falling off. Compared to a one-piece structure, this reduces processing and material costs. Furthermore, the use of a first and second sealing layer prevents water penetration at the connection point and also improves the structural strength of the valve cone. Attached Figure Description

[0018] The features and advantages of this utility model will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as limiting the utility model in any way. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A;

[0021] Figure 3 This is a physical image of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Cone head, 2. Cone rod, 3. Limiting rod, 4. First sealing layer, 5. Second sealing layer, 11. Cone body, 12. Cone tip, 21. Slot, 51. Inclined surface. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] See attached document Figure 1This embodiment provides a valve cone for a needle valve, including a cone head 1 and a cone rod 2. The front end of the cone rod 2 is provided with an external thread, and the cone head 1 is provided with an internal thread that matches the external thread of the cone rod 2. A limiting rod 3 is provided on the cone head 1, and the lower end of the limiting rod 3 extends into the cone rod 2. A first sealing layer 4 is provided at the top position of the limiting rod 3 on the cone head 1. The first sealing layer 4 is used to prevent liquid from entering the limiting rod 3 and to prevent the limiting rod 3 from exiting the cone head 1. A second sealing layer 5 is provided between the cone rod 2 and the cone head 1. In this invention, the cone rod 2 and the cone head 1 are processed separately and then assembled together by a threaded connection. The limiting rod 3 inside the cone head 1 holds the cone rod 2 in place, preventing the cone rod 2 from loosening and falling off. The first sealing layer 4 is used to seal the limiting rod 3, preventing the limiting rod 3 from exiting. The second sealing layer 5 is used to seal the connection between the cone rod 2 and the cone head 1, preventing liquid from penetrating into the threads and causing corrosion, and also increasing the connection strength between the two. The split design reduces the difficulty and time-consuming processing of casting (forging) the blank of the traditional one-piece valve cone. The design of the limit rod 3, the first sealing layer 4, and the second sealing layer 5 reduces the possibility of loosening of the cone rod 2.

[0026] One embodiment of the limiting rod 3: The limiting rod 3 is inserted into the cone head 1, and the lower end of the limiting rod 3 is engaged in the slot 21 of the cone rod 2. Another embodiment of the limiting rod 3: The lower end of the limiting rod 3 is threaded into the cone rod 2.

[0027] As another embodiment of this utility model: the limiting rod 3 includes a head and a rod part, and the diameter of the head is larger than the diameter of the rod part.

[0028] As another embodiment of this utility model: refer to the appendix Figure 2 The limiting rod 3 consists of an upper section and a lower section. The diameter of the lower section is larger than that of the upper section, and the lower section engages with the slot 21 of the tapered rod 2. In this design, only the lower section engages with the tapered rod 2 for limiting, because an excessively long limiting length would lead to greater processing and assembly difficulties.

[0029] As another embodiment of the present invention: the cone head 1 includes a cone body 11 and a cone tip 12, the cone rod 2 is threadedly connected to the cone body 11, the limiting rod 3 is located in the radial direction of the cone body 11, and the distance from the first sealing layer 4 to the axis of the cone body 11 is the maximum radius of the cone body 11.

[0030] As another embodiment of this utility model: the outer side of the second sealing layer 5 is a slope 51, and the slope of the slope 51 is approximately the same as that of the cone 11.

[0031] In another embodiment of this utility model: the first sealing layer 4 and the second sealing layer 5 are both welded layers, and the first sealing layer 4 and the second sealing layer 5 are ground smooth after welding.

[0032] As another embodiment of this utility model: a welding groove is provided between the cone rod 2 and the cone head 1, and the second sealing layer 5 is fixed in the welding groove.

[0033] As another embodiment of this utility model: the welding layer is made of stainless steel, which helps to improve the structural strength of the valve cone.

[0034] Finally, the method of this utility model is only a preferred embodiment and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

[0035] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A valve cone for a needle valve, comprising a cone head and a cone rod, characterized in that, The front end of the cone rod is provided with an external thread, and the cone head is provided with an internal thread that matches the external thread of the cone rod. The cone head is provided with a limiting rod, the lower end of which extends into the cone rod. The cone head is provided with a first sealing layer at the top position of the limiting rod, and a second sealing layer is provided between the cone rod and the cone head.

2. The valve cone of the needle valve according to claim 1, characterized in that, The limiting rod is inserted into the cone head, and the lower end of the limiting rod is engaged in the slot of the cone rod.

3. The valve cone of the needle valve according to claim 2, characterized in that, The limiting rod includes a head and a rod portion, wherein the diameter of the head is larger than the diameter of the rod portion.

4. The valve cone of the needle valve according to claim 3, characterized in that, The limiting rod is divided into an upper section and a lower section. The diameter of the lower section is larger than that of the upper section, and the lower section is engaged in the groove of the tapered rod.

5. The valve cone of the needle valve according to claim 4, characterized in that, The cone head includes a cone body and a cone tip, the cone rod is threadedly connected to the cone body, and the limiting rod is located in the radial direction of the cone body.

6. The valve cone of the needle valve according to claim 5, characterized in that, The outer side of the second sealing layer is a slope.

7. The valve cone of the needle valve according to claim 6, characterized in that, Both the first sealing layer and the second sealing layer are welded layers.

8. The valve cone of the needle valve according to claim 7, characterized in that, A welding groove is provided between the cone rod and the cone head, and the second sealing layer is fixed in the welding groove.

9. The valve cone of the needle valve according to claim 8, characterized in that, The weld layer is made of stainless steel.

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