A valve screw structure for oil valves

Abstract

This utility model discloses a valve screw structure for oil valves, comprising: an upper connecting rod, the upper end of which connects to a valve handwheel, and the lower end of which passes through the connecting cavity of a screw seat; a lower connecting rod, the lower end of which rotatably connects to a flow cut-off plate, and the upper ends of the lower connecting rod and the flow cut-off plate extending into the connecting cavity; and a segmented screw, comprising multiple coaxial, integrally formed screw segments, each screw segment being screwed onto a corresponding internal thread in the middle of the connecting cavity. The valve screw structure of this utility model, through its stepped, segmented screw design and the multiple internal threads within the screw seat, further enhances the screwing strength between the screw segments and the internal threads, preventing the valve screw structure from loosening due to its own weight and external forces, thus ensuring the stability of the valve's operating state.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a valve screw structure for oil valves. Background Technology

[0002] Pipelines used for transporting substances such as oil are equipped with regulating valves to adjust the flow rate and switch the pipeline's on / off state. Some valves use a structure consisting of a screw and a handwheel to drive the movement of a blocking structure within the pipeline, thereby achieving valve regulation and adjusting pipeline transport parameters. This structure uses a screw mechanism screwed to a screw seat for positioning. However, existing screw structures are simple and have low structural strength, posing a risk of breakage during use and rendering the valve unusable. Furthermore, the locking strength of the screw connection between the screw and the screw seat is low, and over time, the screw is prone to loosening, resulting in insufficient valve stability. Utility Model Content

[0003] The purpose of this utility model is to solve the problems of existing oil valve screw structures being simple, having low structural strength, posing a risk of breakage that renders the valve unusable, and having low locking strength of the screw connection between the screw and the screw seat, leading to loosening of the screw over time and insufficient stability of the valve. Therefore, this utility model provides a valve screw structure for oil valves.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a valve screw structure for oil valves, comprising:

[0005] The upper connecting rod connects to the valve handwheel at its upper end and inserts into the connecting cavity of the screw seat at its lower end.

[0006] The lower connecting rod has its lower end rotatably connected to the flow cut-off plate, and the upper ends of the lower connecting rod and the flow cut-off plate extend into the connecting cavity;

[0007] The segmented screw includes multiple coaxial, integrally formed screw segments, each of which is screwed onto the corresponding internal thread in the middle of the connecting cavity.

[0008] As a further description of the above technical solution:

[0009] The upper connecting rod, lower connecting rod, and segmented screw are all made of stainless steel.

[0010] As a further description of the above technical solution:

[0011] The cross-sectional dimensions of each screw segment gradually increase or decrease from top to bottom, and the connecting cavity has a stepped structure.

[0012] As a further description of the above technical solution:

[0013] A first sealing ring is provided between the upper connecting rod and the top of the connecting cavity.

[0014] As a further description of the above technical solution:

[0015] A second sealing ring is provided between the lower connecting rod and the bottom of the connecting cavity.

[0016] As a further description of the above technical solution:

[0017] The hole in the middle of the second sealing ring has a stepped structure, and its bottom is tightly fitted onto the top of the cut-off plate.

[0018] In summary, by adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0019] The valve screw structure of this utility model, through the stepped, segmented screw design and the multi-segment internal thread design within the screw seat, further enhances the screw strength between the screw segments and the internal threads, preventing the valve screw structure from loosening due to its own weight and external forces, thus affecting the stability of the valve's operating state. The first sealing ring prevents external dust and impurities from entering the connection cavity and contaminating the segmented screw, which could prevent the segmented screw from rotating smoothly along the internal threads, or even cause the structure to jam and become unusable. The second sealing ring further improves the tightness and sealing of the valve screw structure and the screw seat, preventing oil leakage and seepage within the pipeline. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This describes the operating state of an oil valve corresponding to a valve screw structure used in oil valves. Figure 1 .

[0022] Figure 2 This describes the operating state of an oil valve corresponding to a valve screw structure used in oil valves. Figure 2 .

[0023] Legend:

[0024] 1. Upper connecting rod; 2. Lower connecting rod; 3. Screw section; 4. First sealing ring; 5. Second sealing ring; 100. Valve handwheel; 110. Screw seat; 120. Connecting cavity; 130. Cut-off plate; 140. Internal thread. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Please see Figure 1-2 This utility model provides a technical solution: a valve screw structure for oil valves, comprising:

[0028] The upper connecting rod 1 has its upper end connected to the valve handwheel 100, and its lower end inserted into the connecting cavity 120 of the screw seat 110;

[0029] The lower connecting rod 2 has its lower end rotatably connected to the flow interceptor 130, and the upper ends of the lower connecting rod 2 and the flow interceptor 130 extend into the connecting cavity 120;

[0030] The segmented screw includes multiple coaxial, integrally formed screw segments 3, each of which is screwed onto the corresponding internal thread 140 in the middle of the connecting cavity 120.

[0031] The upper connecting rod 1, the lower connecting rod 2, and the segmented screw are all made of stainless steel, thereby improving the structural strength and physical and chemical stability of the valve screw structure.

[0032] The cross-sectional dimensions of each screw segment 3 gradually increase or decrease from top to bottom, and the connecting cavity 120 has a stepped structure. This further enhances the screw connection strength between the screw segment 3 and the internal thread 140, preventing the valve screw structure from loosening due to its own weight and external forces, thus ensuring the stability of the valve's operating state. In use, rotating the valve handwheel 100 forward or backward causes the valve screw structure to rotate in either direction, creating downward pressure and lifting force on the throttling plate 130 (which rotates relative to the valve screw structure under the unidirectional sliding restriction at the bottom of the connecting cavity 120). This further blocks or removes the throttling plate 130 from the oil pipeline, achieving adjustment of the pipeline's transport state, specifically as follows: Figure 1 , 2 As shown. In addition, the segmented screw can also adopt an hourglass or spindle-shaped structure, that is, the cross-sectional dimensions of each screw segment 3 gradually increase or decrease from the center to both ends. In this case, the middle part of the connecting cavity 120 is the corresponding hourglass or spindle-shaped structure, so that when the segmented screw is located at the upper and lower dead points (the pipeline is fully open and fully closed), each screw segment 3 is fully screwed with the corresponding internal thread 140, ensuring the stability of the pipeline in use.

[0033] A first sealing ring 4 is provided between the upper connecting rod 1 and the top of the connecting cavity 120 to prevent external dust and impurities from entering the connecting cavity 120, contaminating the segmented screw, and thus preventing the segmented screw from rotating smoothly along the internal thread 140, or even causing the structure to jam and become unusable.

[0034] A second sealing ring 5 is provided between the lower connecting rod 2 and the bottom of the connecting cavity 120. The hole in the middle of the second sealing ring 5 has a stepped structure, and its bottom is tightly fitted onto the top of the cut-off plate 130 to ensure the tightness of the valve screw structure and the screw seat 110, prevent the oil transported in the pipeline from leaking out of the screw seat 110, and improve the sealing performance of the structure connection.

[0035] In summary, due to the adoption of the above technical solution, the valve screw structure for oil valves in this embodiment has the following advantages compared with the prior art:

[0036] The valve screw structure of this utility model, through the stepped, segmented screw design and the multi-segment internal thread design within the screw seat, further enhances the screw strength between the screw segments and the internal threads, preventing the valve screw structure from loosening due to its own weight and external forces, thus affecting the stability of the valve's operating state. The first sealing ring prevents external dust and impurities from entering the connection cavity and contaminating the segmented screw, which could prevent the segmented screw from rotating smoothly along the internal threads, or even cause the structure to jam and become unusable. The second sealing ring further improves the tightness and sealing of the valve screw structure and the screw seat, preventing oil leakage and seepage within the pipeline.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A valve stem structure for a petroleum valve, characterized by, include: The upper connecting rod connects to the valve handwheel at its upper end and inserts into the connecting cavity of the screw seat at its lower end. The lower connecting rod has its lower end rotatably connected to the flow cut-off plate, and the upper ends of the lower connecting rod and the flow cut-off plate extend into the connecting cavity; The segmented screw includes multiple coaxial, integrally formed screw segments, each of which is screwed onto the corresponding internal thread in the middle of the connecting cavity.

2. The valve stem construction for use in petroleum valves as set forth in claim 1, wherein The upper connecting rod, lower connecting rod, and segmented screw are all made of stainless steel.

3. The valve stem construction for petroleum valves as set forth in claim 1, wherein The cross-sectional dimensions of each screw segment gradually increase or decrease from top to bottom, and the connecting cavity has a stepped structure.

4. The valve stem construction for petroleum valves as set forth in claim 1, wherein A first sealing ring is provided between the upper connecting rod and the top of the connecting cavity.

5. A valve screw structure for an oil valve according to claim 1, characterized in that, A second sealing ring is provided between the lower connecting rod and the bottom of the connecting cavity.

6. The valve stem construction for use in petroleum valves as defined in claim 5, wherein The hole in the middle of the second sealing ring has a stepped structure, and its bottom is tightly fitted onto the top of the cut-off plate.

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