CN222992184U

CN222992184U - Double-seal valve

Info

Publication number: CN222992184U
Application number: CN202422354999.1U
Authority: CN
Inventors: 李春; 王旺; 仲为翠; 李�杰
Original assignee: Yancheng Hongjie Petroleum Machinery Co ltd
Current assignee: Yancheng Hongjie Petroleum Machinery Co ltd
Priority date: 2024-09-26
Filing date: 2024-09-26
Publication date: 2025-06-17
Anticipated expiration: 2034-09-26

Abstract

The utility model discloses a double-sealed valve, comprising a valve body and a valve stem. The valve body is provided with a first pipe opening and a second pipe opening that are connected. A positioning tube is fixed in the first pipe opening. A sealing box is connected in the valve body. The valve stem is rotatably connected to the sealing box. A first screw is connected to the inner thread of the valve stem. A first sealing plug is connected to the lower end of the first screw. A sliding groove is provided on the inner wall of the valve body. A sliding rod is connected to the first screw. The sliding rod is slidably connected in the sliding groove. A second screw is connected to the upper part of the second pipe opening. A guide rod is connected to the lower part. A transmission block is threadedly connected to the second screw. A slider is slidably connected to the guide rod. A mounting plate is connected between the transmission block and the slider. A second sealing plug is connected to the mounting plate. A first bevel gear is connected to the end of the second screw. A second bevel gear is connected to the valve stem. The first bevel gear meshes with the second bevel gear. The valve pair simultaneously completes the blocking of the first pipe opening and the second pipe opening, realizes double sealing, and prevents leakage.

Description

Double-seal valve

Technical Field

The utility model relates to the technical field of valves, in particular to a double-seal valve.

Background

The valve is a mechanical device for controlling the flow rate, flow direction, pressure, temperature and the like of flowing fluid medium, the valve is a basic component in a pipeline system, the valve sealing pair consists of a valve seat and a closing member, and sealing is achieved by closely contacting or plastically deforming two sealing surfaces which are precisely processed on the valve seat and the closing member under pressure, so that the valve is a main part for ensuring the reliable operation of the valve. Most of the existing valves are provided with only one sealing plug, and when the sealing plug seals the valve, the sealing surface still has a certain leakage amount, and the sealing performance is general.

Disclosure of utility model

In view of the shortcomings of the prior art, the present utility model provides a dual seal valve to solve the problems mentioned in the background art.

In order to solve the technical problems, the utility model provides the following technical scheme:

A valve cover is connected to the valve body, a valve rod is connected to the valve cover in a rotating mode through a rotating bearing, a rotating wheel is connected to the upper end of the valve rod, a first pipe orifice is arranged at the bottom of the valve body, a second pipe orifice communicated with the first pipe orifice is arranged on one side of the valve body, a positioning pipe is fixedly arranged in the first pipe orifice, a sealing box is connected to the valve body in a connecting mode, the valve rod is connected with the sealing box in a rotating mode, a screw hole extending upwards is formed in the bottom of the valve rod, a first screw rod is connected to the inner thread of the screw hole in a threaded mode, a first sealing plug is connected to the lower end of the first screw rod, the first sealing plug is located above the positioning pipe, a vertical sliding groove is formed in the inner wall of the valve body, a sliding rod is connected to the first screw rod, a transmission block is connected to the lower portion of the second pipe orifice in a sliding mode, a sliding block is connected to the transmission block in a sliding mode, a mounting plate is connected between the transmission block and the sliding block, a second sealing plug is aligned to the second pipe orifice toward one side of the second pipe orifice, the second screw rod is connected to the second conical gear, the conical gear is connected to the end portion of the second conical gear in the sealing box, and the conical gear is meshed with the conical gear.

Preferably, the inner wall of the upper end of the positioning tube is trapezoid, the inner wall is fixed with a first sealing ring, and the lower part of the first sealing plug is trapezoid and is matched with the positioning tube.

Preferably, a second sealing ring is arranged on the outer wall of the second sealing plug.

Preferably, a third sealing ring is arranged at the joint of the valve rod and the sealing box.

Preferably, a fourth sealing ring is arranged at the joint of the second screw rod and the sealing box.

Preferably, one end of the guide rod, which is far away from the second pipe orifice, is connected with a limiting block.

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

The rotating wheel is rotated to drive the valve rod to rotate, the valve rod rotates in-process to drive the first screw rod to move downwards, so that the first sealing plug is plugged on the positioning pipe, the second screw rod is driven to rotate through the cooperation of the second bevel gear and the first bevel gear in the valve rod rotation process, and the second sealing plug is driven to plug in the second pipe orifice, so that the plugging of the first pipe orifice and the second pipe orifice is completed simultaneously, double sealing is realized, and leakage is prevented.

Drawings

FIG. 1 is a schematic illustration of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

In the figure, the valve comprises a 1-valve body, a 2-valve cover, a 3-valve rod, a 4-rotating wheel, a 5-first pipe orifice, a 6-second pipe orifice, a 7-positioning pipe, an 8-sealing box, a 9-screw hole, a 10-first screw rod, an 11-first sealing plug, a 12-sliding chute, a 13-sliding rod, a 14-second screw rod, a 15-guide rod, a 16-transmission block, a 17-sliding block, an 18-mounting plate, a 19-second sealing plug, a 20-first conical gear, a 21-second conical gear, a 22-first sealing ring, a 23-second sealing ring, a 24-third sealing ring, a 25-fourth sealing ring and a 26-limiting block.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1 and 2, a double-seal valve comprises a valve body 1, wherein a valve cover 2 is connected to the valve body 1, a valve rod 3 is rotatably connected to the valve cover 2 through a rotary bearing, a rotating wheel 4 is connected to the upper end of the valve rod 3, a first pipe orifice 5 is arranged at the bottom of the valve body 1, a second pipe orifice 6 communicated with the first pipe orifice is arranged at one side of the valve body 1, a positioning pipe 7 is fixedly arranged in the first pipe orifice 5, a seal box 8 is connected to the valve rod 3 in a connecting mode, a screw hole 9 extending upwards is arranged at the bottom of the valve rod 3, a first screw rod 10 is connected to the inner thread of the screw hole 9, a first sealing plug 11 is connected to the lower end of the first screw rod 10, a sliding groove 12 is arranged on the inner wall of the valve body 1, a sliding rod 13 is connected to the first sealing plug position near the first sealing plug, a sliding rod 13 is connected to the sliding groove 12, a second screw rod 14 is connected to the upper part in the second pipe orifice 6, a guide rod 15 is connected to the lower part of the valve body 14, a transmission block 16 is connected to the second screw rod 14 in a sliding mode, a sliding block 17 is connected to the sliding block 16 is connected to the sliding rod 15, a sealing block 17 is connected to the sliding rod 17, a first conical sealing block 18 is connected to the second conical block 20 is connected to the second conical sealing block 19, and the second conical block is connected to the second conical sealing block 20, and the sealing block is connected to the second conical block 19, and the sealing block is connected to the mounting plate 20.

When the sealing device is used, the rotating wheel 4 is rotated to drive the valve rod 3 to rotate, as the first screw rod 10 is in threaded connection with the valve rod 3, and one side of the first screw rod 10 is in sliding connection with the sliding groove 12 through the sliding rod 13, the first screw rod 10 is driven to move downwards in the rotating process of the valve rod 3 until the first sealing plug is plugged on the positioning pipe, at the moment, the upper part of the first screw rod 10 is still in threaded connection with the screw hole 9, and the second screw rod 14 is driven to rotate through the cooperation of the second bevel gear 21 and the first bevel gear 20 in the rotating process of the valve rod 3, so that the second sealing plug 19 is driven to be plugged in the second pipe orifice 6, and the sealing of the first pipe orifice 5 and the second pipe orifice 6 is completed simultaneously, so that double sealing is realized, and leakage is prevented.

The inner wall of the upper end of the positioning tube 7 is trapezoid, a first sealing ring 22 is fixed on the inner wall, and the lower part of the first sealing plug 11 is trapezoid and matched with the positioning tube 7. After the first sealing plug is plugged on the positioning pipe, the sealing performance of the positioning pipe can be improved through the effect of the first sealing ring.

The outer wall of the second sealing plug 19 is provided with a second sealing ring 23. After the second sealing plug is plugged in the second pipe orifice, the sealing performance of the second pipe orifice can be improved through the effect of the second sealing ring.

A third sealing ring 24 is arranged at the joint of the valve rod 3 and the sealing box 8. Through the effect of the third sealing ring, the tightness of the joint of the valve rod and the sealing box can be improved, and liquid is prevented from entering the sealing box.

A fourth sealing ring 25 is arranged at the joint of the second screw 14 and the sealing box 8. Through the effect of fourth sealing washer, can improve the leakproofness of second screw rod and seal box junction, prevent that liquid from getting into in the seal box.

Example 2

The difference between this embodiment and embodiment 1 is that the end of the guide rod far away from the second nozzle is connected with a limiting block 26. By connecting the limiting block 26 to the guide rod, the sliding block can be prevented from falling off the guide rod in the moving process.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A double-seal valve is characterized by comprising a valve body (1), wherein a valve cover (2) is connected to the valve body (1), a valve rod (3) is rotatably connected to the valve cover (2) through a rotary bearing, a rotating wheel (4) is connected to the upper end of the valve rod (3), a first pipe orifice (5) is arranged at the bottom of the valve body (1), a second pipe orifice (6) communicated with the first pipe orifice is arranged on one side of the valve body (1), a positioning pipe (7) is fixedly arranged in the first pipe orifice (5), a sealing box (8) is connected to the valve body (1), the valve rod (3) is rotatably connected with the sealing box (8), a screw hole (9) extending upwards is arranged at the bottom of the valve rod (3), a first screw rod (10) is connected to the inner thread of the screw hole (9), a first sealing plug (11) is connected to the lower end of the first screw rod (10), a vertical sliding groove (12) is arranged on the inner wall of the valve body (1), a position close to the first sliding rod (13) is connected to the first pipe orifice, a sliding rod (13) is slidingly connected to the sliding groove (12), a second screw rod (14) is connected to the upper end of the second screw rod (14), a second screw rod (16) is connected to the upper end of the second screw rod (14), the guide rod (15) is connected with a sliding block (17) in a sliding manner, a mounting plate (18) is connected between the transmission block (16) and the sliding block (17), one side, facing the second pipe orifice, of the mounting plate (18) is connected with a second sealing plug (19), the second sealing plug (19) is aligned with the second pipe orifice (6), the second screw (14) is rotationally connected with the sealing box (8), the end part, located in the sealing box, of the second screw (14) is connected with a first conical gear (20), the valve rod (3) is connected with a second conical gear (21), and the first conical gear (20) is meshed with the second conical gear (21).

2. The double-seal valve according to claim 1, wherein the inner wall of the upper end of the positioning tube (7) is trapezoid, a first sealing ring (22) is fixed on the inner wall, and the lower part of the first sealing plug (11) is trapezoid and matched with the positioning tube (7).

3. A double seal valve according to claim 2, characterized in that the outer wall of the second sealing plug (19) is provided with a second sealing ring (23).

4. A double seal valve according to claim 3, wherein a third seal ring (24) is provided at the junction of the valve stem (3) and the seal box (8).

5. A double seal valve according to claim 4, wherein a fourth seal ring (25) is provided at the junction of the second screw (14) and the seal box (8).

6. A double seal valve according to any one of claims 1-5, wherein the end of the guide rod (15) remote from the second nozzle is connected with a limiting block (26).