Gate valve with good sealing performance

Abstract

The utility model discloses a gate valve with good sealing performance, which comprises a valve, a valve rod is arranged above the middle of the valve, sealing mechanisms are symmetrically arranged on the left side and the right side of the outside of the valve, each sealing mechanism comprises a flange, a sealing ring, a bolt and a disc spring, the flanges are symmetrically and fixedly arranged on the left side and the right side of the outside of the valve, and the sealing rings are arranged on the flanges. A sealing ring is tightly attached to the outer side of the flange, and bolts are arranged in the flange at equal angles. According to the gate valve with the good sealing performance, by arranging the sealing mechanism, the sealing performance of connection between the flange and a pipeline is greatly improved, the condition of leakage caused by medium circulation is effectively avoided, meanwhile, the anti-blocking mechanism is arranged, impurities in a medium can be blocked on the outer side of the valve through a filter screen, it is guaranteed that the interior of the valve cannot be blocked, and the service life of the valve is prolonged. In addition, a protection mechanism is arranged, a protection cover is arranged on the outer side of the valve rod, it is guaranteed that the valve rod cannot be frozen in winter, and the valve rod can be normally adjusted and operated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gate valve, concretely to a gate valve with good sealing performance. BACKGROUND

[0002] The gate valve is a valve with a gate as a closing and opening part, the moving direction of which is perpendicular to the fluid direction, and the main function of the gate valve is to perform full opening and full closing operation, and it cannot be used for adjusting and throttling. It realizes sealing by the contact between the valve seat and the gate plate, and the metal material is usually built up on the sealing surface to increase the wear resistance. At present, the gate valves suitable for the market are various, but still have some shortcomings.

[0003] The existing gate valve is connected with the pipeline through the flange. Since the medium flows between the pipeline and the flange, there is a certain vibration, which can cause the sealing performance between the flange and the pipeline to be poor. For example, the Chinese utility model patent with the authorization announcement number CN212004317U discloses a gate valve with good sealing performance, which comprises a gate valve body, a column body fixedly arranged in the gate valve body, the column body extending to the top of the gate valve body, and a locking mechanism arranged in the column body. The locking mechanism comprises a rotating rod, a stand fixedly arranged at the bottom of the rotating rod, a gate plate arranged at the bottom of the stand, and a rubber air bag arranged at the bottom of the gate plate. The utility model is twisted to rotate the rotating rod, and the rotating rod rotates and moves downward. Then, the stand and the bearing make the gate plate move downward, the gate plate extrudes the rubber air bag, the air in the rubber air bag moves to both sides of the rubber air bag around the gate plate, the rubber air bag fills the gate valve body, and then the gate plate cooperates with the gate valve body to be closed. The rubber air bag and the gate plate form three layers of sealing, which avoids the gap in the closed state and has good sealing effect. However, when the medium flows in the valve body for a long time, the impurities contained in the medium can accumulate in the valve, which can cause the valve to be blocked. In addition, the valve stem is adjusted by rotating the valve disc, and the valve stem can be frozen in the cold winter, which can affect the normal operation of the valve. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a gate valve with good sealing performance to solve the problems of the existing gate valve, the vibration caused by the long-time flow of the medium in the pipeline and the valve, the poor sealing performance between the valve flange and the pipeline, the impurities contained in the medium, the blockage of the valve, the freezing of the valve stem in the cold winter, and the normal operation of the valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a gate valve with good sealing performance, which comprises:

[0006] The valve is provided with a valve rod above the middle part of the valve;

[0007] Further comprising:

[0008] The left and right sides of the outer part of the valve are symmetrically provided with sealing mechanisms, wherein the sealing mechanisms comprise flanges, sealing rings, bolts and disc springs, the flanges are fixedly installed on the left and right sides of the outer part of the valve, the outer sides of the flanges are tightly fitted with the sealing rings, and the inner parts of the flanges are provided with the bolts at equal angles;

[0009] The outer side of the valve rod is provided with a protection mechanism, wherein the protection mechanism comprises a protection cover, an anti-freezing pad, a top cover, a clamping block and a fixing block, the outer side of the valve rod is provided with the protection cover, the inner wall of the protection cover is installed with the anti-freezing pad, the upper part of the protection cover is installed with the top cover, and the left and right sides of the top cover are fixedly installed with the clamping block.

[0010] Preferably, the outer side of the clamping block is clamped and connected with the fixing block, and the fixing block is symmetrically and rotatably installed on the outer side of the protection cover.

[0011] Preferably, the inner part of the bolt is provided with the disc spring, and the outer side of the disc spring is tightly fitted with the inner side of the flange.

[0012] Preferably, the inner part of the bolt is provided with the disc spring, and the outer side of the disc spring is tightly fitted with the inner side of the flange.

[0013] Preferably, the outer side of the filter screen is symmetrically and fixedly installed with a connecting block in the middle part, and the outer side of the connecting block is clamped and connected with a connecting hook.

[0014] Preferably, the outer side of the connecting hook is fixedly connected with a spring, and the outer side of the spring is fixedly connected with the inner part of the valve.

[0015] Preferably, the outer side of the spring is provided with a protection hose.

[0016] Compared with the prior art, the gate valve with good sealing performance greatly improves the sealing performance of the connection between the flange and the pipeline, effectively avoids the leakage of the medium flow, simultaneously sets the anti-clogging mechanism, blocks the impurities in the medium outside the valve by the filter screen, guarantees that the valve will not be clogged, and additionally sets the protection mechanism, sets the protection cover on the outer side of the valve rod, guarantees that the valve rod will not be frozen in winter, and enables normal adjustment operation;

[0017] 1. The utility model provides a valve with valve stem, protective cover and anti-freezing pad, the protective cover is arranged on the outside of valve stem, the protective cover is made of rubber material, can effectively prevent external impact, and the anti-freezing pad is arranged on the inner wall of protective cover, can effectively prevent the frost of valve stem in winter;

[0018] 2. The utility model provides a valve with top cover, clamping block and fixed block, the top cover is installed above the protective cover, the clamping block is fixedly installed on the left and right sides of top cover, the clamping block is clamped and connected with the fixed block that is symmetrically installed on the left and right sides of the upper side of protective cover, and the fixed block is rotatably connected with the protective cover, that is, the fixed block is pulled to rotate outward, so that the fixed block and the clamping block are separated, then the top cover can be removed from above, facilitating the operation of valve stem;

[0019] 3. The utility model provides a valve with flange, sealing ring, bolt and disc spring, the flange is fixedly installed on the left and right sides of valve, and the flange is connected with the pipeline on the outside, and the sealing ring is arranged on the outside of flange, when the flange is connected with the pipeline, the sealing ring is located on the inner side of flange and pipeline, thereby increasing the sealing property of pipeline and flange, in addition, the bolt is arranged at equal angles in the inside of flange, that is, the bolt is inserted into the inside of flange and connected pipeline and is tightened and fixed, then the disc spring is arranged on the inside of bolt, the disc spring is tightly attached to the inside of flange, the arrangement of disc spring can provide additional compression force, thereby enhancing the sealing effect, and the disc spring can automatically compensate when the bolt is loose, thereby maintaining the tightness of flange connection;

[0020] 4. The utility model provides a valve with filter screen, the filter screen is arranged in the inside of valve, and the filter screen can block the impurities contained in the flowing medium on the outside of valve.

[0021] 5. The utility model provides a valve with connecting rod, scraping ring, connecting block and connecting hook, the connecting rod is installed in the middle of filter screen, the scraping ring is arranged on the inside of connecting rod, the scraping ring is tightly attached to the inside of valve, in addition, the connecting block is installed on the upper and lower sides of the middle of filter screen on the outside, the connecting hook is clamped and connected with the outside of connecting block, the spring is connected with the outside of connecting hook, the spring is connected with the inner wall of valve on the outside, and the protective hose is arranged on the outside of connecting hook for protection, that is, when the filter screen needs to be replaced and cleaned, the connecting block and connecting hook are separated, then the connecting block is pulled, and the filter screen is pulled out of the inside of valve, when the filter screen is removed, the connecting rod is connected, and the scraping ring also moves, thereby scraping the inner wall of valve, and the inner wall of valve is cleaned. DRAWINGS

[0022] Figure 1 It is a perspective structure schematic view of the utility model;

[0023] Figure 2The utility model discloses a top cover, card block and fixed block connection perspective structure schematic diagram.

[0024] Figure 3 The utility model discloses a flange, sealing ring and bolt connection perspective structure schematic diagram.

[0025] Figure 4 The utility model discloses a perspective cross section structure schematic diagram.

[0026] Figure 5 The utility model discloses a sealing ring, bolt and disc spring connection perspective structure schematic diagram.

[0027] Figure 6 The utility model discloses a connecting block, connecting hook and spring connection perspective structure schematic diagram.

[0028] Figure 7 The utility model discloses a protective cover, top cover and card block connection perspective structure schematic diagram.

[0029] In the drawing: 1, valve; 2, valve stem; 3, protective cover; 4, anti -icing pad; 5, top cover; 6, card block; 7, fixed block; 8, flange; 9, sealing ring; 10, bolt; 11, disc spring; 12, filter screen; 13, connecting rod; 14, scraping ring; 15, connecting block; 16, connecting hook; 17, spring; 18, protective hose. DETAILED DESCRIPTION

[0030] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor are within the scope of the utility model.

[0031] Please refer to Figures 1-7 The utility model provides a technical scheme:

[0032] Embodiment 1: In order to solve the problems existing in the prior art, therefore, the embodiment solves the problems by the following technical scheme, a gate valve with good sealing performance is provided with a valve 1; a sealing mechanism is arranged on the left and right sides outside the valve 1, which can greatly enhance the sealing performance between the flange 8 and the pipeline; a anti-blocking mechanism is arranged inside the valve 1, a filter screen 12 is arranged inside the valve 1, the filter screen 12 can block the impurities contained in the circulating medium outside the valve 1, and ensure the cleanliness inside the valve 1; a protection mechanism is arranged on the outside of the valve stem 2, which can effectively prevent the valve stem 2 from being collided and protect the valve stem 2 from freezing in winter; first, a protective cover 3 is arranged on the outside of the valve stem 2, a freeze-proof pad 4 is arranged inside the protective cover 3, the arrangement of the protective cover 3 can prevent the valve stem 2 from being collided, and the arrangement of the freeze-proof pad 4 can prevent the valve stem 2 from freezing in winter, and a top cover 5 is installed above the protective cover 3, since the clamping blocks 6 symmetrically installed on the outside of the top cover 5 are clamped and connected with the fixed blocks 7 installed on the outside above the protective cover 3, and the lower part of the fixed blocks 7 is rotatably arranged with the protective cover 3, that is, by pulling the fixed blocks 7 to rotate outward, the fixed blocks 7 and the clamping blocks 6 can be separated, and the top cover 5 can be removed from above the protective cover 3, so that the valve stem 2 can be operated, and the flanges 8 are symmetrically and fixedly installed on the left and right sides of the valve 1, and the outside of the flanges 8 is connected with the pipeline, that is, the sealing rings 9 are tightly fitted on the outside of the flanges 8, when the flanges 8 are connected with the pipeline, the sealing rings 9 are located on the inside of the flanges 8 and the pipeline, which can improve the sealing performance of the connection between the pipeline and the flanges 8, in addition, the bolts 10 are arranged at equal angles on the inside of the flanges 8, the bolts 10 are inserted into the inside of the flanges 8 and the connecting pipeline for tightening and fixing, secondly, the disc springs 11 are arranged on the inside of the bolts 10, the disc springs 11 are tightly fitted with the inside of the flanges 8, the arrangement of the disc springs 11 can provide additional compression force, thereby enhancing the sealing effect, in addition, the filter screen 12 is arranged inside the valve 1, the filter screen 12 can effectively block the impurities contained in the circulating medium outside the valve 1, in addition, the connecting blocks 15 are symmetrically installed on the outside of the filter screen 12, the connecting hooks 16 are clamped and connected with the outside of the connecting blocks 15, the outside of the connecting hooks 16 is connected with the springs 17, secondly, the protective hoses 18 are arranged on the outside of the springs 17 for protection, that is, the connecting hooks 16 can be pulled to separate from the connecting blocks 15, at this time, the filter screen 12 can be pulled out of the inside of the valve 1, since the connecting rods 13 are installed on the rear side of the middle part of the filter screen 12, the scraping rings 14 are installed on the inside of the connecting rods 13, the scraping rings 14 are tightly fitted with the inner wall of the valve 1, that is, when the filter screen 12 moves out of the inside of the valve 1, the scraping rings 14 will scrape the inner wall of the valve 1, thereby cleaning the inner wall of the valve 1.

[0033] The existing gate valve, through the medium long time in the pipeline and valve 1 inside flow, there will be a certain vibration, long-term will lead to the connection between the flange 8 and the pipeline sealing poor, therefore the embodiment through the following technical scheme, as shown in Figure 1 、 Figure 2 and Figure 5 Sealing mechanism includes the flange 8 arranged outside the valve 1, the outside of the flange 8 will be connected with the pipeline, at the same time, the sealing ring 9 is arranged outside the flange 8, when the flange 8 is connected with the pipeline, the sealing ring 9 will be located inside the flange 8 and the pipeline, so as to increase the sealing of the pipeline and the flange 8, in addition, the bolts 10 are arranged at equal angles inside the flange 8, that is, the bolts 10 are inserted into the inside of the flange 8 and the connecting pipeline for tightening and fixing, then the disc spring 11 is arranged inside the bolt 10, the disc spring 11 is tightly attached to the inside of the flange 8, the disc spring 11 can provide additional compression force, so as to enhance the sealing effect, the disc spring 11 can automatically compensate when the bolt 10 is loose, so as to keep the tightness of the flange 8 connection.

[0034] Embodiment 2: the existing gate valve, the inside of the flow medium contains certain impurities, long-term flow in the valve 1 will cause the valve 1 to produce the condition of blockage, therefore the embodiment through the following technical scheme, as shown in Figure 3 、 Figure 4 and Figure 6 Anti-blocking mechanism includes the filter screen 12 arranged inside the valve 1, the filter screen 12 can block the impurities contained in the flow medium outside the valve 1, the connecting rod 13 is installed in the middle of the filter screen 12, the inside of the connecting rod 13 is provided with the scraping ring 14, the scraping ring 14 is tightly attached to the inside of the valve 1, in addition, the connecting block 15 is installed on the upper and lower sides of the middle of the filter screen 12, the outside of the connecting block 15 is clamped and connected with the connecting hook 16, the outside of the connecting hook 16 is connected with the spring 17, the outside of the spring 17 is connected with the inner wall of the valve 1, at the same time, the protective hose 18 is arranged outside the connecting hook 16 for protection, that is, when the filter screen 12 needs to be replaced and cleaned, the connecting block 15 and the connecting hook 16 can be separated, then the filter screen 12 can be pulled out of the inside of the valve 1 by pulling the connecting block 15, at the same time, when the filter screen 12 is removed, the scraping ring 14 will also move through the connection of the connecting rod 13, so as to scrape the inner wall of the valve 1, thereby cleaning the inner wall of the valve 1.

[0035] Embodiment 3: the existing gate valve, in the cold winter weather, the valve stem 2 is prone to freezing, which will affect the normal operation of the valve 1 and other problems, therefore the embodiment through the following technical scheme, as shown in Figure 1 、 Figure 4 and Figure 7As shown, the protection mechanism includes a protective cover 3 arranged outside the valve stem 2, the protective cover 3 is made of rubber material, which can effectively prevent external impact, and a frost pad 4 is arranged on the inner wall of the protective cover 3, which can effectively prevent the valve stem 2 from freezing in winter, in addition, a top cover 5 is installed above the protective cover 3, and the left and right sides of the top cover 5 are symmetrically fixedly installed with clamping blocks 6, the clamping blocks 6 are clamped and connected with the left and right symmetrically installed fixed blocks 7 on the upper side of the protective cover 3, and the fixed blocks 7 are rotatably connected with the protective cover 3, that is, pulling the fixed blocks 7 to rotate outward can make the fixed blocks 7 and the clamping blocks 6 separate, then the top cover 5 can be taken off from above, and the valve stem 2 is convenient to operate.

[0036] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, the standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0037] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A gate valve with good sealing performance, comprising: a valve (1), a valve rod (2) is arranged above the middle part of the valve (1); characterized in that it further comprises: a sealing mechanism is symmetrically arranged on the left and right sides of the outer part of the valve (1), wherein the sealing mechanism comprises a flange (8), a sealing ring (9), a bolt (10) and a disc spring (11), the flange (8) is fixedly installed on the left and right sides of the outer part of the valve (1), the sealing ring (9) is tightly attached to the outer side of the flange (8), and the bolts (10) are arranged at equal angles in the inner part of the flange (8); a protection mechanism is arranged on the outer side of the valve rod (2), wherein the protection mechanism comprises a protective cover (3), an anti-freezing pad (4), a top cover (5), a clamping block (6) and a fixed block (7), the protective cover (3) is arranged on the outer side of the valve rod (2), the anti-freezing pad (4) is installed on the inner wall of the protective cover (3), the top cover (5) is installed on the upper part of the protective cover (3), and the clamping block (6) is fixedly installed on the left and right sides of the top cover (5).

2. A gate valve with good sealing performance according to claim 1, characterized in that: The outer side of the clamping block (6) is connected with the fixed block (7), and the fixed block (7) is symmetrically and rotatably installed on the outer side of the protective cover (3).

3. A gate valve with good sealing performance according to claim 1, characterized in that: The disc spring (11) is arranged in the inner part of the bolt (10), and the outer side of the disc spring (11) is tightly attached to the inner side of the flange (8).

4. The gate valve with good sealing performance according to claim 1, characterized in that: A filter screen (12) is arranged in the inner part of the valve (1), a connecting rod (13) is fixedly installed in the middle part of the filter screen (12), a scraping ring (14) is installed on the inner side of the connecting rod (13), and the scraping ring (14) is tightly attached to the inner wall of the valve (1).

5. A gate valve with good sealing performance according to claim 4, characterized in that: A connecting block (15) is symmetrically fixedly installed on the outer side of the filter screen (12), and a connecting hook (16) is connected with the outer side of the connecting block (15).

6. A gate valve with good sealing performance according to claim 5, characterized in that: A spring (17) is fixedly connected to the outer side of the connecting hook (16), and the outer side of the spring (17) is fixedly connected with the inner part of the valve (1).

7. A gate valve with good sealing performance according to claim 6, characterized in that: A protective hose (18) is arranged on the outer side of the spring (17).

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