Non-return blind plate valve

Abstract

The utility model discloses a non-return type blind plate valve, and belongs to the technical field of chemical pipelines. The blind plate valve overcomes the defects that in the prior art, a traditional blind plate valve is prone to gas leakage, and production safety is affected. A main body structure of the check valve comprises a base, a movable valve body, a fixed valve body and a valve plate are arranged on the base, the valve plate is arranged between the movable valve body and the fixed valve body, a check component is arranged on one side of the movable valve body and comprises a valve seat, a flange plate used for being connected with a pipeline is arranged on the side face of the valve seat, and a mounting vertical plate is arranged on one side wall of the valve seat. A non-return baffle used for preventing media from flowing is hinged to the installation vertical plate. The utility model is mainly applied to chemical pipelines.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of chemical pipeline, concretely, especially relate to a check blind plate valve. BACKGROUND

[0002] In industrial pipeline systems, check valves and blind plate valves are two very important valve types. Check valves are mainly used to prevent backflow of medium and protect equipment in the pipeline system from damage; while blind plate valves are used to isolate a certain section of the pipeline for maintenance or replacement work. However, in some specific application scenarios, relying solely on traditional check valves or blind plate valves may not fully meet the requirements, for example, in cases where both backflow prevention and effective isolation functions are required.

[0003] Although traditional blind plate valves can effectively prevent the reverse flow of medium, in some cases, due to design limitations, they may not provide sufficient sealing performance, especially in high-pressure or high-temperature environments. In addition, when maintenance or repair of the pipeline system is required, additional butterfly valves or other forms of isolation devices are usually needed to ensure safety, which not only increases the complexity of the system, affects installation efficiency, but also increases cost and operational difficulty, and if only a blind plate valve is used, gas leakage may occur, affecting production safety; in addition, when the butterfly valve is damaged, the blind plate valve is prone to slight gas leakage, further affecting production safety.

[0004] A high-temperature-resistant blind plate valve is disclosed in Chinese Utility Model Patent No. CN 216590017 U, which uses a straight electric hydraulic push rod for the drive mechanism. The electric hydraulic push rod has high speed, self-locking and overload automatic protection functions. The motor is installed at the tail of the push rod, away from the pipeline heat source. Even in the event of an emergency, the motor can operate normally, providing strong reliability. The valve plate sealing uses three sealing rings, with the outer ring being a silicone rubber sealing ring that is not affected by high temperatures. However, this design has the following disadvantages: it only has the function of a blind plate valve, and if the blind plate valve is damaged, it may lead to gas leakage, affecting production safety, and when a section of the pipeline needs to be repaired, the operability is poor. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem of overcoming the deficiencies of the prior art and provides a check blind plate valve.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a check blind plate valve, including the base, is provided with movable valve body, fixed valve body and valve plate on the base, the valve plate is arranged between movable valve body and fixed valve body, one side of movable valve body is provided with check component, and check component includes valve seat, and the side surface of valve seat is provided with the flange disc for connecting with pipeline, and one side wall of valve seat is provided with installation vertical board, and the hinged stop check baffle for preventing medium flow is connected on installation vertical board.

[0008] Preferably, a rotating shaft is arranged on the installation vertical board, and the stop check baffle is hingedly connected to the installation vertical board through the rotating shaft.

[0009] Preferably, an installation plate is arranged at the upper end of the installation vertical board.

[0010] Preferably, the installation plate is connected to the installation vertical board by bolts, and a sealing ring for preventing medium leakage is arranged between the installation plate and the installation vertical board.

[0011] Preferably, a valve seat sealing ring is arranged between the stop check baffle and the inner wall of the valve seat.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. By arranging the check component on one side of the movable valve body, the medium backflow can be effectively prevented, the safety of the pipeline system is improved, and the risk of equipment damage caused by medium backflow is reduced.

[0014] 2. The valve seat sealing ring is arranged between the stop check baffle and the valve seat, and the sealing ring is also arranged between the installation plate and the installation vertical board, so that the overall sealing performance of the valve is greatly improved, the risk of medium leakage is effectively prevented, especially in high-pressure or high-temperature environments.

[0015] 3. The stop check baffle is hingedly connected to the installation vertical board through the rotating shaft, so that the operation is more flexible and convenient. In addition, the installation plate is connected to the installation vertical board by bolts, which is convenient for disassembly and maintenance, and reduces the maintenance cost and time.

[0016] 4. The utility model combines the functions of the traditional check valve and the blind plate valve, can prevent medium backflow and effectively isolate the pipeline, reduces the need for additional installation of other types of valves, simplifies the design of the pipeline system, and reduces the overall cost.

[0017] 5. The utility model can adapt to various working environments, including but not limited to extreme conditions such as high pressure and high temperature, which increases the application range and market potential.

[0018] In summary, when there is medium flowing into the pipeline, the medium entering from left to right will exert a certain pressure on the check valve, causing it to rotate and opening the pipeline; when there is no medium in the pipeline, the check valve returns to its original position under the action of gravity, closing the pipeline. This demonstrates significant advantages in improving safety, enhancing sealing performance, simplifying operation and maintenance, and reducing costs. Attached Figure Description

[0019] Fig. 1 This is the front view of the present invention;

[0020] Fig. 2 This is a schematic diagram of the internal structure of this utility model.

[0021] In the diagram: 1. Lead screw assembly; 2. Movable valve body; 3. Check valve component; 4. Base; 5. Fixed valve body; 6. Electric push rod; 7. Valve plate; 31. Check valve baffle; 32. Rotary shaft; 33. Valve seat seal ring; 34. Mounting vertical plate; 35. Mounting plate; 36. Valve seat; 37. Flange. Detailed Implementation

[0022] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

[0023] Example 1:

[0024] like Figs. 1-2 As shown, a check valve includes a base 4, on which a movable valve body 2, a fixed valve body 5, and a valve plate 7 are disposed. The valve plate 7 is disposed between the movable valve body 2 and the fixed valve body 5. One end of the valve plate 7 is connected by an electric push rod 6, and the other end is hinged to a screw pair 1 at the top of the movable valve body 2 and the fixed valve body 5. A check component 3 is disposed on one side of the movable valve body 2. The check component 3 includes a valve seat 36. A flange 37 for connecting to a pipeline is disposed on the side of the valve seat 36. A mounting vertical plate 34 is disposed on one side wall of the valve seat 36. A check baffle 31 for preventing the flow of medium is hinged on the mounting vertical plate 34.

[0025] Example 2:

[0026] A check valve differs from Embodiment 1 in that a rotating shaft 32 is provided at the mounting vertical plate 34, and the check baffle 31 is hinged to the mounting vertical plate 34 via the rotating shaft 32.

[0027] Furthermore, an mounting plate 35 is provided at the upper end of the mounting vertical plate 34. The mounting plate 35 is connected to the mounting vertical plate 34 by bolts, and a sealing ring for preventing media leakage is provided between the mounting plate 35 and the mounting vertical plate 34. The sealing ring greatly improves the overall sealing performance of the valve and effectively prevents the risk of media leakage, especially in high pressure or high temperature environments.

[0028] Further, a valve seat sealing ring 33 is arranged between the check baffle 31 and the inner wall of the valve seat 36, and the valve seat sealing ring 33 arranged between the check baffle 31 and the valve seat 36 further enhances the sealing effect and ensures that no medium can pass through.

[0029] The working principle of the utility model is as follows:

[0030] Normal flow state: when the medium flows through the pipeline in the predetermined direction, the medium entering from the left to the right will give the check part 3 a certain pressure, so that the check baffle 31 rotates in the direction indicated by the arrow, and then the pipeline is opened, at this time, the valve plate 7 is in the open position, which ensures smooth flow of the medium;

[0031] Leakage prevention function: when there is no medium in the pipeline, the check baffle 31 on the check part 3 will reset under the action of gravity, and the pipeline will be closed; the check baffle 31 is hingedly connected to the installation vertical plate 34 through the rotating shaft 32, which enables the check baffle 31 to be closed when there is no medium flow, effectively preventing medium leakage;

[0032] Isolation function: in addition to preventing medium leakage, the check type blind plate valve also has the function of isolating part of the pipeline; by adjusting the position of the movable valve body 2, effective isolation of a specific pipe section can be achieved; in this case, even if the check baffle 31 has prevented the medium, the valve plate 7 can also be completely closed to completely cut off the medium passage for maintenance or replacement work;

[0033] Sealing performance guarantee: in addition to the valve seat sealing ring 33 between the check baffle 31 and the valve seat 36, a sealing ring is also arranged between the mounting plate 35 and the installation vertical plate 34, and the double sealing measures greatly reduce the risk of medium leakage, especially in high pressure or high temperature environments, which can provide more reliable sealing protection;

[0034] Convenient operation and maintenance: the mounting plate 35 and the installation vertical plate 34 are connected by using bolts, and the design is considered for easy disassembly, so that the utility model is not only easy to operate, but also very convenient to maintain, greatly reducing the maintenance cost and time, and improving the work efficiency.

Claims

1. A check valve, comprising a base (4), on which a movable valve body (2), a fixed valve body (5), and a valve plate (7) are disposed, the valve plate (7) being disposed between the movable valve body (2) and the fixed valve body (5), characterized in that: A check valve component (3) is provided on one side of the movable valve body (2). The check valve component (3) includes a valve seat (36). A flange (37) for connecting to a pipeline is provided on the side of the valve seat (36). A mounting plate (34) is provided on one side wall of the valve seat (36). A check baffle (31) for preventing the flow of medium is hinged on the mounting plate (34).

2. The check valve according to claim 1, characterized in that: A pivot (32) is provided at the mounting vertical plate (34), and the check baffle (31) is hinged to the mounting vertical plate (34) through the pivot (32).

3. The check valve according to claim 2, characterized in that: An mounting plate (35) is provided at the upper end of the mounting vertical plate (34).

4. The check valve according to claim 3, characterized in that: The mounting plate (35) is connected to the mounting vertical plate (34) by bolts, and a sealing ring for preventing media leakage is provided between the mounting plate (35) and the mounting vertical plate (34).

5. The check valve according to any one of claims 1-4, characterized in that: A valve seat sealing ring (33) is provided between the check baffle (31) and the inner wall of the valve seat (36).

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