Valve rod nut of rising stem gate valve

Abstract

The utility model relates to the technical field of rising stem gate valves, in particular to a rising stem gate valve stem nut which comprises a valve stem nut body, a thread portion, a rod portion and an abutting portion are sequentially distributed on the valve stem nut body in the axial direction, a self-lubricating assembly is arranged on the inner wall of the valve stem nut body, and the self-lubricating assembly comprises an oil groove formed in the inner wall of the valve stem nut body. The oil groove is filled with a pure cotton core, oil outlets are formed in the side, located on the inner side of the valve rod nut, of the oil groove at equal intervals, the oil outlets communicate with the pure cotton core, and the oil outlets are filled with wiping sponge. Lubricating oil is injected into the oil groove and gradually permeates the pure cotton core and the wiping sponge, when the valve rod rotates in the valve rod nut, the wiping sponge wipes the lubricating oil to the surface of the valve rod nut, the self-lubricating purpose is achieved, and therefore abrasion of the valve rod nut is reduced.

Description

Technical Field

[0001] This utility model relates to the field of rising stem gate valve technology, specifically to a valve stem nut for a rising stem gate valve. Background Technology

[0002] Rising stem gate valves are industrial valves. The opening and closing element of a soft-seal gate valve is a gate. The direction of movement of the gate is perpendicular to the direction of fluid flow. Gate valves can only be fully open or fully closed. They are mainly composed of valve body, valve cover, gate, valve stem, valve seat, and sealing packing.

[0003] In rising stem gate valves, the trapezoidal thread of the valve stem is located outside the valve body, at the top of the valve stem. The valve is opened and closed by rotating the valve stem nut, which causes the valve stem to drive the gate to rise and fall synchronously. Existing valve stem nuts do not have a self-lubricating structure, resulting in high friction with the valve stem and easy damage and wear. Therefore, a valve stem nut for rising stem gate valves is proposed, in which lubricating oil is added to the oil groove and allowed to saturate the pure cotton core, and then flows into the wiping sponge. This allows the lubricating oil to be wiped onto the surface of the valve stem when it rotates. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides a valve stem nut for a rising stem gate valve. Lubricating oil is added to the oil groove and allowed to saturate a pure cotton core before flowing into a wiping sponge. This allows the lubricating oil to be wiped onto the surface of the valve stem as it rotates.

[0005] The technical solution adopted by this utility model to solve its technical problem is a valve stem nut for a rising stem gate valve, including a valve stem nut, wherein a threaded part, a stem part and an abutment part are distributed sequentially in the axial direction of the valve stem nut, and a self-lubricating component is provided on the inner wall of the valve stem nut, wherein the self-lubricating component includes an oil groove formed in the inner wall of the valve stem nut;

[0006] The oil tank is filled with a pure cotton core. The oil tank has oil outlets equidistantly opened on one side inside the valve stem nut. The oil outlets are connected to the pure cotton cores and are filled with wiping sponges.

[0007] By adopting the above technical solution, lubricating oil is injected into the oil tank. The lubricating oil gradually permeates the pure cotton core and the wiping sponge. The wiping sponge, which is soaked in lubricating oil, wipes the lubricating oil onto its surface when the valve stem rotates.

[0008] Specifically, the oil groove has an internally threaded oil inlet at the top of the valve stem nut, and a plug is installed inside the internally threaded oil inlet.

[0009] Specifically, a bottom ring is provided at the bottom end of the valve stem nut located inside the abutment part, and a plane bearing is provided between the bottom ring and the valve stem nut.

[0010] Specifically, a keyway is provided on one side of the rod.

[0011] Specifically, the wiping sponge is made of polyurethane material.

[0012] The beneficial effects of this utility model are:

[0013] The present invention relates to a valve stem nut for a rising stem gate valve. By removing the plug, lubricating oil is injected into the oil groove. The lubricating oil in the oil groove permeates the pure cotton core and flows into the wiping sponge in the oil outlet. When the valve stem rotates inside the valve stem nut, the wiping sponge wipes the lubricating oil onto its surface, achieving the purpose of self-lubrication.

[0014] The present invention relates to a valve stem nut for a rising stem gate valve, wherein the bottom ring is mounted on the bottom end of the valve stem nut via a plane bearing and can rotate. When the operator rotates the valve stem nut by turning the valve handwheel to push the valve stem up and down, the bottom ring at the bottom of the contact part rotates on the rising stem gate valve bracket and will not rub against the rising stem gate valve bracket, thereby reducing the wear of the valve stem nut. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the first telescopic component structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the vacuum suction cup and servo motor structure of this utility model;

[0019] In the diagram: 1. Valve stem nut; 101. Abutment part; 102. Stem part; 103. Keyway; 104. Threaded part; 2. Self-lubricating component; 201. Oil groove; 202. Pure cotton core; 203. Oil outlet; 204. Wiping sponge; 205. Internal threaded oil inlet; 206. Plug; 3. Bottom ring; 4. Surface bearing. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Add lubricating oil to the oil tank and saturate the cotton core, then let it flow into the wiping sponge. This allows the lubricating oil to be wiped onto the valve stem surface as it rotates. Figure 1-3 As shown, the valve stem nut of the rising stem gate valve of this utility model includes a valve stem nut 1. The valve stem nut 1 has a threaded portion 104, a stem portion 102 and an abutment portion 101 distributed in sequence in the axial direction. The valve stem nut 1 has a self-lubricating component 2 on its inner wall. The self-lubricating component 2 includes an oil groove 201 formed on the inner wall of the valve stem nut 1.

[0022] The oil trough 201 is filled with a pure cotton core 202. The oil trough 201 has oil outlets 203 equidistantly opened on one side of the inner side of the valve stem nut 1. The oil outlets 203 are connected to the pure cotton core 202. The oil outlets 203 are filled with wiping sponges 204.

[0023] When in use, lubricating oil is injected into the oil tank 201. The lubricating oil gradually soaks through the pure cotton core 202 and the wiping sponge 204. The wiping sponge 204, which is soaked in lubricating oil, wipes the lubricating oil onto its surface when the valve stem rotates.

[0024] For example, such as Figure 3 As shown, the present invention also includes an internally threaded oil inlet 205 at the top of the oil groove 201 located at the top of the valve stem nut 1, and a plug 206 is provided inside the internally threaded oil inlet 205.

[0025] During use, lubricating oil can be injected into the oil groove 201 through the internal threaded oil inlet 205, and the plug 206 is used to seal the internal threaded oil inlet 205.

[0026] For example, such as Figure 2 As shown, the present invention also includes a bottom ring 3 at the bottom end of the valve stem nut 1 located inside the abutment portion 101, and a plane bearing 4 is provided between the bottom ring 3 and the valve stem nut 1.

[0027] During use, the bottom ring 3 and the plane bearing 4 can reduce the friction between the valve stem nut 1 and the rising stem gate valve bracket.

[0028] For example, such as Figure 1 As shown, the present invention also includes a keyway 103 provided on one side of the rod portion 102.

[0029] In use, the keyway 103 facilitates the fixing of the valve handwheel to the outside of the rod 102 via a flat key.

[0030] For example, such as Figure 3 As shown, the present invention also includes that the wiping sponge 204 is made of polyurethane material.

[0031] When in use, the 204 wiping sponge made of polyurethane material has good wear resistance and is not easily worn.

[0032] In use, the valve stem nut 1 is put on the valve stem, and the bottom of the valve stem nut 1 contacts the bracket of the rising stem gate valve. The valve handwheel is put on the outside of the stem 102 through the keyway 103 using a flat key. Then the nut is screwed on the outside of the threaded part 104 to prevent the valve handwheel from falling off the stem 102.

[0033] The bottom ring 3 is mounted on the bottom end of the valve stem nut 1 via a plane bearing 4 and can rotate. When the operator rotates the valve stem nut 1 through the valve handwheel to push the valve stem up and down, the bottom ring 3 at the bottom of the contact part 101 rotates on the rising stem gate valve bracket and will not rub against the rising stem gate valve bracket, thereby reducing the wear of the valve stem nut 1.

[0034] Personnel use tools to remove the plug 206, inject lubricating oil into the oil tank 201, the lubricating oil in the oil tank 201 soaks the pure cotton core 202, and flows into the wiping sponge 204 in the oil outlet 203. When the valve stem rotates in the valve stem nut 1, the wiping sponge 204 wipes the lubricating oil onto its surface to achieve self-lubrication.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A valve stem nut for a rising stem gate valve, characterized in that, The valve stem nut (1) includes a threaded portion (104), a stem portion (102) and an abutment portion (101) arranged sequentially in the axial direction. The valve stem nut (1) is provided with a self-lubricating component (2) on its inner wall. The self-lubricating component (2) includes an oil groove (201) formed on the inner wall of the valve stem nut (1). The oil trough (201) is filled with a pure cotton core (202). The oil trough (201) is provided with oil outlets (203) at equal intervals on one side inside the valve stem nut (1). The oil outlets (203) and the pure cotton core (202) are connected. The oil outlets (203) are filled with wiping sponges (204).

2. The stem nut of a rising stem gate valve according to claim 1, characterized in that, The oil groove (201) is located at the top of the valve stem nut (1) and has an internal threaded oil inlet (205). The internal threaded oil inlet (205) is provided with a plug (206).

3. The stem nut of a rising stem gate valve according to claim 1, characterized in that, The bottom end of the valve stem nut (1) located inside the abutment part (101) is provided with a bottom ring (3), and a plane bearing (4) is provided between the bottom ring (3) and the valve stem nut (1).

4. The stem nut of a rising stem gate valve according to claim 1, characterized in that, A keyway (103) is provided on one side of the rod (102).

5. The stem nut of a rising stem gate valve according to claim 1, characterized in that, The wiping sponge (204) is made of polyurethane material.

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