Stainless steel check valve convenient to maintain

Abstract

The utility model discloses a stainless steel check valve convenient to maintain, and aims to solve the problem that in the prior art, a fluid direction mark is integrally arranged on a valve cover of a stainless steel check valve and used for guiding the direction of a valve body during installation, but the phenomenon that the direction of the valve cover is installed reversely is frequently found during quality inspection before leaving a factory. The rotary opening type valve comprises a valve body, a valve clack rocker assembly connected with the valve body in a rotary opening type sealing mode, a U-shaped connecting frame fixedly connected with the valve body through a first bolt, and a valve cover connected with the valve body through a second bolt in a sealing mode. The U-shaped connecting frame is hinged to the swing type valve clack rocker. A sealing ring is arranged between the valve body and the valve cover; after the first bolts are connected, bolt heads of the first bolts are integrally higher than the top surface of the valve body; the valve cover comprises a fluid direction indication mark arranged on the top face and a limiting groove formed in the bottom of the end cover and matched with a bolt head of the first bolt, and during connection, the bolt head of the first bolt is arranged in the limiting groove in a non-contact mode.

Description

Technical Field

[0001] This utility model relates to the technical field of check valve equipment, and in particular to a stainless steel check valve that is easy to maintain. Background Technology

[0002] Swing stainless steel check valves, as key devices for preventing backflow in pipeline systems, have been widely used in petrochemical, water supply and drainage and other fields due to their automatic opening and closing characteristics without external power.

[0003] Our company currently has swing stainless steel check valves with an integrated fluid direction indicator on the valve cover to guide the valve body direction during installation. However, during quality inspection before leaving the factory, we often find that the valve cover is installed in the wrong direction, which greatly affects the product qualification rate and the safety of subsequent system operation. Utility Model Content

[0004] The purpose of this invention is to provide a stainless steel check valve that is easy to maintain, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stainless steel check valve that is easy to maintain includes a valve body and a valve disc rocker assembly that is pivotally and sealingly connected to the valve body. The valve body is characterized by further including a U-shaped connecting frame fixedly connected to the valve body by a first bolt and a valve cover pivotally and sealingly connected to the valve body by a second bolt. The U-shaped connecting frame is hinged to the pivotally and sealingly connected to the valve disc rocker. A sealing ring is provided between the valve body and the valve cover. After the first bolt is connected, the bolt head of the first bolt protrudes above the top surface of the valve body. The valve cover includes a fluid direction indicator on its top surface and a limiting groove on the bottom of the end cover that matches the bolt head of the first bolt. During connection, the bolt head of the first bolt is placed in the limiting groove without contact.

[0007] Preferably, the diameter of the limiting groove is 1.1-1.5 times the diameter of the bolt head of the first bolt, which ensures assembly tolerance and avoids positioning failure due to excessive clearance; the groove opening edge is provided with guide rounded corners to reduce alignment difficulty and improve assembly efficiency.

[0008] Preferably, the valve cover includes a detachable identification block; the identification block includes a main body that is threadedly connected to the valve cover, a fluid direction indicator integrally formed on the top surface of the main body, and an RFID tag embedded in the main body; the valve cover has a snap-fit ​​groove that matches the main body. By embedding an RFID tag in the detachable identification block, traditional paper maintenance records are upgraded to electronic management. Maintenance personnel can quickly read the valve's unique code, maintenance history, and next maintenance time using a handheld terminal, avoiding omissions in manual registration.

[0009] Preferably, the main board body is threadedly connected to the valve cover, which facilitates quick disassembly and replacement.

[0010] Preferably, the edge of the motherboard body is provided with a limiting slot, and correspondingly, the locking groove is provided with a limiting protrusion that matches the limiting slot; the limiting slot and the limiting protrusion are mutually limiting and abutting to prevent the directional markings from being installed backwards.

[0011] Preferably, the RFID tag is a passive tag, which can work without power supply.

[0012] Compared with the prior art, the stainless steel check valve of this application, which is easy to maintain, has the following advantages:

[0013] 1. Anti-misassembly and positioning reinforcement design:

[0014] The valve cover's bottom features a limiting groove that engages with the first bolt head without contact, creating a physical constraint during assembly. If the valve cover is installed incorrectly, the bolt head's position deviates from the limiting groove, preventing a complete fit and forcing the operator to adjust the orientation, thus completely eliminating the problem of the valve cover being installed backwards. Simultaneously, the limiting groove's diameter is designed to be 1.1-1.5 times the bolt head diameter, ensuring assembly tolerance while preventing excessive clearance that could lead to positioning failure. The groove's guide radius further reduces alignment difficulty and improves assembly efficiency.

[0015] 2. Upgrade to electronic maintenance and management:

[0016] Existing swing stainless steel check valves rely on the reverse flow of the medium and gravity to close the valve disc when backflow occurs. This results in a relatively long closing time (especially under low pressure or low flow rate conditions), which can easily lead to water hammer. Therefore, the maintenance cycle is short, generally 2-3 months, which is higher than other valve structures. Currently, the maintenance management of swing stainless steel check valves mainly involves maintenance personnel manually recording the locations of each check valve in the maintenance manual. This is extremely inconvenient for statistics and management, easily leading to data loss or missed maintenance times, and cannot meet the needs of modern management. This invention upgrades traditional paper-based maintenance records to electronic management by embedding RFID tags in a detachable identification block. Maintenance personnel can quickly read the valve's unique code, maintenance history, and next maintenance time using a handheld terminal, avoiding omissions in manual registration. The passive RFID tags operate without power, are resistant to high temperatures and corrosive environments, and have a lifespan synchronized with the valve body. Combined with a cloud database, the maintenance status of all check valves in the area can be monitored in real time, shortening management response time. Meanwhile, the marking block uses a combined threaded connection and limit slot fixing method, which not only prevents the directional marking from being installed backwards, but also supports quick disassembly and replacement. When the label is damaged, only the marking block needs to be quickly replaced, without replacing the entire valve cover, improving maintenance efficiency and significantly reducing spare parts inventory pressure.

[0017] This utility model systematically solves the two major pain points of traditional check valves—prone to incorrect installation direction and inefficient maintenance management—through the dual innovation of mechanical error-proof design and electronic management. It significantly improves maintenance efficiency, extends valve service life, and achieves full-chain efficiency improvement from production and assembly to operation and maintenance management, thus having significant economic benefits and industrialization promotion value. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of the structure of an embodiment of the present utility model;

[0020] Figure 3 This is an exploded view of the structure of an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the first bolt and the valve body in an embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram of the valve cover structure in an embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of the valve cover marking block in an embodiment of the present utility model;

[0024] Figure 7 This is an exploded view of the valve cover marking block in an embodiment of this utility model;

[0025] Figure 8 This is a schematic diagram of the connection structure of the RFID tag in an embodiment of this utility model;

[0026] Figure 9 This is a diagram illustrating the architecture of the RFID maintenance management system in this embodiment of the present invention.

[0027] Reference numerals in the attached drawings: 1. Valve body; 2. Valve disc rocker assembly; 3. First bolt; 4. U-shaped connecting bracket; 5. Second bolt seal; 6. Sealing ring; 7. Valve cover; 71. Limiting groove; 72. Identifier block; 721. Main body; 722. Limiting slot; 73. Snap-fit ​​groove; 731. Limiting protrusion; 74. Fluid direction indicator; 75. RFID tag. Detailed Implementation

[0028] The following detailed description illustrates the specific implementation method: Example

[0029] like Figure 1-5As shown in the figure, this embodiment demonstrates a stainless steel check valve that is easy to maintain, including a valve body 1, a valve disc rocker assembly 2 that is connected to the valve body 1 in a swing-type sealing connection, a U-shaped connecting frame 4 that is fixedly connected to the valve body 1 by a first bolt 3, and a valve cover 7 that is connected to the valve body 1 in a sealing connection by a second bolt 5; the U-shaped connecting frame 4 is hinged to the swing-type valve disc rocker; a sealing ring 6 is provided between the valve body 1 and the valve cover 7;

[0030] In this embodiment, after the first bolt 3 is connected, the bolt head of the first bolt 3 is higher than the top surface of the valve body 1. The valve cover 7 includes a fluid direction indicator 74 on the top surface and a limiting groove 71 on the bottom of the end cover that matches the bolt head of the first bolt 3. When connected, the bolt head of the first bolt 3 is placed in the limiting groove 71 without contact.

[0031] To further explain, in a further possible implementation of this embodiment, such as Figure 4-5 As shown, the diameter of the limiting groove 71 is 1.1-1.5 times the diameter of the bolt head of the first bolt 3, which ensures assembly tolerance and avoids positioning failure due to excessive clearance; the groove opening edge of the limiting groove 71 is provided with a guide rounded corner, which reduces the difficulty of alignment and improves assembly efficiency. Example

[0032] like Figure 6-9 As shown, another embodiment illustrates a maintenance-friendly stainless steel check valve, comprising a valve body 1 and a valve cover 7 connected to the valve body 1 by a second bolt sealing 5; a sealing ring 6 is provided between the valve body 1 and the valve cover 7; further, in a further possible embodiment of this invention, the valve cover 7 includes a detachable identification block 72; the identification block 72 includes a main body 721 that is threadedly fitted into the valve cover 7, a fluid direction indicator 74 integrally formed on the top surface of the main body 721, and an RFID tag 75 embedded in the main body 721; the valve cover 7 is provided with a snap-fit ​​groove 73 that matches the main body 721. By embedding the RFID tag 75 in the detachable identification block 72, traditional paper maintenance records are upgraded to electronic management. Maintenance personnel can quickly read the unique code of the valve body 1, maintenance history, and next maintenance time through a handheld terminal, avoiding omissions in manual registration.

[0033] To further explain, in these embodiments, the main board body 721 is threadedly connected to the valve cover 7, facilitating quick disassembly and replacement. Furthermore, the edge of the main board body 721 is provided with a limiting groove 722, and correspondingly, the locking groove 73 is provided with a limiting protrusion 731 that matches the limiting groove 722; the limiting groove 722 and the limiting protrusion 731 engage in limiting contact, preventing the directional markings from being installed incorrectly.

[0034] In some other possible implementations of this embodiment, the RFID tag 75 is a passive tag that can operate without power.

[0035] Specifically, the architecture diagram of the RFID maintenance management system in this embodiment is as follows: Figure 9 As shown, the valve body 1 is made of stainless steel, so the RFID tag 75 can be an anti-metal RFID tag 75 to reduce electromagnetic interference, such as the commonly used UHF EPC Gen2 passive tag. The reading and writing device can be a handheld UHF RFID reading and writing terminal, which supports a reading and writing distance of 5-30cm. The RFID tag 75 data includes the valve's unique code, the last maintenance time, the next planned maintenance time, the employee number of the last maintenance personnel, the current status, etc., and can realize real-time 4G / WiFi wireless data transmission with the cloud and local server.

[0036] Maintenance personnel operation procedures:

[0037] 1. Scan tag: When the handheld terminal is brought close to the stainless steel check valve, the RFID tag 75 basic information is automatically read.

[0038] 2. Data entry: The terminal APP automatically loads the valve's historical records; fill in the maintenance details for this operation.

[0039] 3. Tag Update: After maintenance is completed, the next maintenance time will be automatically calculated; the summary data within the tags will be updated.

[0040] 4. Cloud synchronization: Detailed records are uploaded to the cloud database via 4G / WiFi.

[0041] This RFID maintenance management system achieves a data closed loop between "valve-maintenance personnel-system" through RFID tags 75, taking into account both the reliability of the industrial environment and the needs of information management. It can significantly improve the maintenance efficiency of stainless steel check valves and form a digital archive of equipment maintenance cycles.

[0042] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A stainless steel check valve that is easy to maintain, comprising a valve body and a valve disc rocker assembly that is connected to the valve body in a swing-type sealing connection, characterized in that: It also includes a U-shaped connecting frame fixedly connected to the valve body by a first bolt and a valve cover sealed to the valve body by a second bolt; the U-shaped connecting frame is hinged to the swing valve disc rocker arm; a sealing ring is provided between the valve body and the valve cover; after the first bolt is connected, the bolt head of the first bolt is higher than the top surface of the valve body; the valve cover includes a fluid direction indicator on the top surface and a limiting groove on the bottom of the end cover that matches the bolt head of the first bolt, and when connected, the bolt head of the first bolt is placed in the limiting groove without contact.

2. The easy-to-maintain stainless steel check valve according to claim 1, characterized in that: The diameter of the limiting groove is 1.1-1.5 times the diameter of the bolt head of the first bolt; the edge of the limiting groove is provided with a guide radius.

3. The easy-to-maintain stainless steel check valve according to claim 1, characterized in that: The valve cover includes a detachable identification block; the identification block includes a main body that is threadedly connected to the valve cover, a fluid direction indicator integrally formed on the top surface of the main body, and an RFID tag embedded in the main body; the valve cover is provided with a snap-fit ​​groove that matches the main body.

4. The easy-to-maintain stainless steel check valve according to claim 3, characterized in that: The main body is threadedly connected to the valve cover.

5. The easy-to-maintain stainless steel check valve according to claim 4, characterized in that: The motherboard body has a limiting slot on its edge, and correspondingly, the locking slot has a limiting protrusion that matches the limiting slot; the limiting slot and the limiting protrusion are mutually limiting and abutting.

6. The easy-to-maintain stainless steel check valve according to claim 3, characterized in that: The RFID tags mentioned are passive tags.

Images