Multi-sealing gate valve

Abstract

The utility model discloses a multi-sealing gate valve, which relates to the technical field of gate valves and comprises a valve body, flanges are mounted at two ends of the valve body, a connecting pipe is mounted on one side, far away from the center of the valve body, of each flange, a connecting mechanism is arranged outside each flange, and a valve cover is mounted at the top of the valve body. A sealing mechanism is installed in the valve body, a valve rod is installed in the center of the valve deck, and a valve wheel is fixedly installed at the top of the valve rod. According to the multi-sealing gate valve, through the arrangement of the connecting mechanism, when the connecting pipe is installed, the valve body and the connecting pipe are connected through the flanges firstly, and after the positions of the valve body and the connecting pipe are fixed, the flanges are tightly attached under the action of the connecting buckles and the sealing buckles; and the sealing ring is subjected to the pressure of extrusion deformation, so that the sealing performance of the joint between the valve body and the connecting pipe is ensured, and the leakage condition is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field related to gate valves, in particular to a multiple-sealing gate valve. Background Art

[0002] A gate valve generally includes a valve body, a gate plate, an inlet pipe and an outlet pipe. The valve body has a medium channel. The gate plate is movably arranged in the valve body to block or release the medium in the medium channel. However, the sealing structure of traditional gate valves is relatively simple and most of them do not have the function of multiple sealing.

[0003] The structure of the gate valve currently in use is relatively simple, and leakage is prone to occur during use. Usually, the locations where the gate valve is prone to leakage are mainly the location of the valve stem and the connection between the valve body and the connecting pipe, which are prone to leakage, thus affecting the use effect of the gate valve. Utility Model Content

[0004] The utility model aims to provide a multi-sealed gate valve to solve the problem that the gate valve currently used in the background technology is relatively simple in structure and is prone to leakage during use. Usually, the positions where the gate valve is prone to leakage are mainly the position of the valve stem and the connection between the valve body and the connecting pipe, which are prone to leakage, thus affecting the use effect of the gate valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-sealed gate valve, comprising a valve body, flanges are installed at both ends of the valve body, a connecting pipe is installed on the side of the flange away from the center of the valve body, a connecting mechanism is arranged on the outside of the flange, a valve cover is installed on the top of the valve body, a sealing mechanism is installed inside the valve body, a valve stem is installed at the center of the valve cover, and a valve wheel is fixedly installed on the top of the valve stem.

[0006] Preferably, a valve plug is fixedly connected to the bottom of the valve stem, and a through opening is opened at the center of the valve plug.

[0007] Preferably, the connecting mechanism includes a connecting buckle, the internal thread of the connecting buckle away from the center of the valve body is connected to an adjusting screw, the side of the adjusting screw close to the center of the valve body is rotatably connected to a sealing buckle, an installation groove is opened inside the flange, and a sealing ring is embedded inside the installation groove.

[0008] Preferably, a flange is installed on the outer wall surface of the connecting pipe, and the flange is symmetrically arranged with respect to the central axis of the valve body. The valve body and the connecting pipe are movably connected via the flange and bolts.

[0009] Preferably, the sealing buckle forms a movable structure through an adjusting screw and a connecting buckle, and both ends of the sealing ring are respectively embedded in the interior of the installation groove.

[0010] Preferably, the sealing mechanism includes an adjusting screw, which is arranged inside the valve stem, and the adjusting screw and the valve stem form an integrated structure. The external thread of the adjusting screw is connected to an adjusting plate, and a sealing gasket is fixedly installed on the bottom of the adjusting plate.

[0011] Preferably, the adjusting screw rod passes through the inside of the adjusting plate and the sealing gasket, and the adjusting plate forms a lifting structure through the adjusting screw rod.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The multi-sealed gate valve is provided with a connection mechanism. When installing the connecting pipe, the valve body and the connecting pipe are first connected through the flange. After the positions of the valve body and the connecting pipe are fixed, the flanges are tightly fitted through the action of the connecting buckle and the sealing buckle, and the sealing ring is subjected to the pressure of extrusion and deformation, thereby ensuring the sealing of the connection between the valve body and the connecting pipe to avoid leakage;

[0014] 2. The multi-sealed gate valve, through the setting of the sealing mechanism, during use, when the valve plug rotates, the position of the adjusting plate and the sealing gasket is driven to descend, and the bottom of the sealing gasket is closely fitted with the gap between the valve stem and the valve body. The gap is sealed by the sealing gasket to avoid liquid leakage from the gap during use, thereby ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0016] Figure 2 This is a left-side structural schematic diagram of the utility model;

[0017] Figure 3 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0018] Figure 4 For this utility model Figure 1 Enlarged structural diagram at B in the middle.

[0019] In the figure: 1. valve body; 2. flange; 3. connecting pipe; 4. connecting mechanism; 401. connecting buckle; 402. adjusting screw; 403. sealing buckle; 404. sealing ring; 5. valve cover; 6. sealing mechanism; 601. adjusting screw; 602. adjusting plate; 603. sealing gasket; 7. valve stem; 8. valve wheel; 9. valve plug; 10. through port. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model provides a technical solution: a multi-sealed gate valve, including a valve body 1, flanges 2 are installed at both ends of the valve body 1, a connecting pipe 3 is installed on the side of the flange 2 away from the center of the valve body 1, a connecting mechanism 4 is arranged outside the flange 2, a valve cover 5 is installed on the top of the valve body 1, a sealing mechanism 6 is installed inside the valve body 1, a valve stem 7 is installed at the center of the valve cover 5, and a valve wheel 8 is fixedly installed on the top of the valve stem 7. A valve plug 9 is fixedly connected to the bottom of the valve stem 7, and a through hole 10 is opened at the center of the valve plug 9.

[0022] The connection mechanism 4 includes a connection buckle 401, the inner thread of the connection buckle 401 away from the center of the valve body 1 is connected to the adjusting screw 402, the side of the adjusting screw 402 close to the center of the valve body 1 is rotatably connected to the sealing buckle 403, the flange 2 is provided with a mounting groove, and the mounting groove is embedded with a sealing ring 404. The outer wall surface of the connecting pipe 3 is installed with a flange 2, and the flange 2 is symmetrically arranged with the central axis of the valve body 1. The valve body 1 and the connecting pipe 3 are movably connected through the flange 2 and bolts. The sealing buckle 403 forms a movable structure with the connection buckle 401 through the adjusting screw 402, and the two ends of the sealing ring 404 are respectively embedded in the mounting groove. Through the setting of the connecting mechanism 4, when the connecting pipe 3 is installed, the valve body 1 and the connecting pipe 3 are first connected through the flange 2. After the positions of the valve body 1 and the connecting pipe 3 are fixed, the flanges 2 are tightly fitted through the action of the connecting buckle 401 and the sealing buckle 403, and the sealing ring 404 is subjected to the pressure of extrusion and deformation, thereby ensuring the sealing of the connection between the valve body 1 and the connecting pipe 3 to avoid leakage.

[0023] The sealing mechanism 6 includes an adjusting screw 601, which is arranged inside the valve stem 7. The adjusting screw 601 and the valve stem 7 form an integrated structure. The external thread of the adjusting screw 601 is connected with an adjusting plate 602, and a sealing gasket 603 is fixedly installed at the bottom of the adjusting plate 602. The adjusting screw 601 passes through the inside of the adjusting plate 602 and the sealing gasket 603, and the adjusting plate 602 forms a lifting structure through the adjusting screw 601. Through the setting of the sealing mechanism 6, during use, when the valve plug 9 rotates, the position of the adjusting plate 602 and the sealing gasket 603 is driven to descend, and the bottom of the sealing gasket 603 is tightly fitted with the gap between the valve stem 7 and the valve body 1, and the gap is sealed by the sealing gasket 603 to prevent liquid from leaking from the gap during use, so as to ensure the sealing effect.

[0024] Working principle: First, the valve body 1 and the connecting pipe 3 need to be connected so that the valve body 1 and the flange 2 of the connecting pipe 3 are relatively fitted, and the flange 2 is connected by bolts. Since the flange 2 is provided with a mounting groove inside and a sealing ring 404 is embedded inside the mounting groove, the sealing ring 404 can block the gap at the connection of the flange 2 to avoid leakage.

[0025] When it is necessary to allow the connecting pipes 3 to flow through the valve body 1, the valve wheel 8 drives the valve stem 7 and the valve plug 9 to rotate. When the valve plug 9 rotates, the connecting pipes 3 are connected through the opening 10. Since the adjusting screw 601 and the valve stem 7 form an integrated structure, when the valve stem 7 rotates, the position of the adjusting plate 602 and the sealing gasket 603 is driven to drop, and then the bottom of the sealing gasket 603 is able to fit tightly with the gap between the valve stem 7 and the valve body 1. The gap is sealed by the sealing gasket 603 to avoid liquid leakage from the gap during use, thereby ensuring the sealing effect.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multiple seal gate valve, comprising a valve body (1), characterized in that: Flanges (2) are installed at both ends of the valve body (1), a connecting pipe (3) is installed on the side of the flange (2) away from the center of the valve body (1), a connecting mechanism (4) is arranged outside the flange (2), a valve cover (5) is installed on the top of the valve body (1), a sealing mechanism (6) is installed inside the valve body (1), a valve stem (7) is installed at the center of the valve cover (5), and a valve wheel (8) is fixedly installed on the top of the valve stem (7).

2. A multi-seal gate valve according to claim 1, characterized in that: A valve plug (9) is fixedly connected to the bottom of the valve stem (7), and a through hole (10) is opened at the center of the valve plug (9).

3. A multi-seal gate valve according to claim 1, characterized in that: The connecting mechanism (4) comprises a connecting buckle (401), the connecting buckle (401) being connected to an adjusting screw (402) via an internal thread on a side away from the center of the valve body (1), the adjusting screw (402) being rotatably connected to a sealing buckle (403) on a side close to the center of the valve body (1), and a mounting groove being provided inside the flange (2), and a sealing ring (404) being embedded inside the mounting groove.

4. A multi-seal gate valve according to claim 1, characterized in that: A flange (2) is installed on the outer wall surface of the connecting pipe (3), and the flange (2) is symmetrically arranged with respect to the central axis of the valve body (1). The valve body (1) and the connecting pipe (3) are movably connected via the flange (2) and bolts.

5. A multi-seal gate valve according to claim 3, characterized in that: The sealing buckle (403) forms a movable structure with the connecting buckle (401) through the adjusting screw rod (402), and the two ends of the sealing ring (404) are respectively embedded in the interior of the installation groove.

6. A multi-seal gate valve according to claim 1, characterized in that: The sealing mechanism (6) comprises an adjusting screw (601), wherein the adjusting screw (601) is arranged inside the valve stem (7), and the adjusting screw (601) and the valve stem (7) form an integrated structure. The external thread of the adjusting screw (601) is connected to an adjusting plate (602), and a sealing gasket (603) is fixedly installed at the bottom of the adjusting plate (602).

7. A multi-seal gate valve according to claim 6, characterized in that: The adjusting screw rod (601) passes through the inside of the adjusting plate (602) and the sealing gasket (603), and the adjusting plate (602) forms a lifting structure through the adjusting screw rod (601).

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