Internal structure of flange vertical check valve

Abstract

The utility model relates to the technical field of vertical check valves, and discloses an internal structure of a flange vertical check valve, which comprises a valve body, flange plates are fixedly connected at two ends of the valve body, four retainers are fixedly connected inside the valve body, shaft sleeves made of phosphor bronze are fixedly connected among the four retainers, and the shaft sleeves are fixedly connected with the valve body. A valve rod is slidably connected to the middle of the shaft sleeve, and a valve clack is fixedly connected to the bottom end of the valve rod. According to the technical scheme, the material of the shaft sleeve is improved, phosphor bronze with higher hardness is adopted, higher corrosion resistance and abrasion resistance are achieved, abrasion between the valve rod and the shaft sleeve is effectively reduced, the phenomenon that the valve clack collides with the inner wall of the valve body when the valve clack ascends and descends due to the fact that a gap between the valve rod and the shaft sleeve is large is avoided, sealing performance is stable, one-way flowing of media is guaranteed, and the service life of the valve clack is prolonged. The safe and stable operation of the system is guaranteed, the cost of newly purchasing a check valve is reduced, and the maintenance work intensity is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical check valves, in particular to the internal structure of a flange vertical check valve. Background Art

[0002] In power companies' water pump outlet pipes, numerous check valves are used to prevent backflow. These check valves include horizontal and vertical types. Vertical check valves primarily connect to vertically arranged pipes. A typical vertical check valve consists of a valve body, a disc, and a spring, each housed within the body. The upper and lower ends of the valve body serve as the outlet and inlet, respectively.

[0003] When the vertical check valve of the prior art is in use, the valve stem and the shaft sleeve will continue to wear, causing the movable clearance between the valve stem and the shaft sleeve to change, thereby causing the valve disc to collide with the inner wall of the valve body during the up and down movement, affecting normal use. Therefore, a flanged vertical check valve internal structure is required. Utility Model Content

[0004] The purpose of the utility model is to provide an internal structure of a flange vertical check valve, which solves the problems raised in the background technology.

[0005] An embodiment of the present application provides an internal structure of a flanged vertical check valve, including a valve body, both ends of the valve body are fixedly connected to flange plates, four retaining frames are fixedly connected to the interior of the valve body, phosphor bronze sleeves are fixedly connected between the four retaining frames, the middle of the sleeve is slidably connected to a valve stem, and the bottom end of the valve stem is fixedly connected to a valve disc.

[0006] During use, by improving the material of the sleeve and adopting phosphor bronze with higher hardness, it has stronger corrosion resistance and wear resistance, effectively reducing the wear of the valve stem and the sleeve, and avoiding the phenomenon of the valve disc colliding with the inner wall of the valve body when rising and falling due to the large gap between the valve stem and the sleeve. The sealing is stable, ensuring the unidirectional flow of the medium and the safe and stable operation of the system, which not only reduces the cost of purchasing new check valves, but also reduces the intensity of maintenance work.

[0007] Optionally, the hardness of the phosphor bronze sleeve reaches 200HB-260HB, and the tensile strength reaches 290MPa-550Mpa.

[0008] The adoption of the above technical solution is beneficial to reducing the wear of the shaft sleeve.

[0009] Optionally, a center hole adapted to the valve stem is opened at the middle position of the shaft sleeve.

[0010] The adoption of the above technical solution is conducive to reducing the gap between the shaft sleeve and the valve stem.

[0011] Optionally, six mounting holes are formed on the flange, and the six mounting holes are distributed in a ring shape.

[0012] The adoption of the above technical solution is conducive to the installation of the valve body.

[0013] Optionally, a spring is fixedly connected between the valve disc and the shaft sleeve, and the spring sleeve is arranged on the outside of the valve stem.

[0014] The adoption of the above technical solution is conducive to resetting the valve disc.

[0015] Optionally, the retaining frame is made of stainless steel metal.

[0016] By adopting the above technical solution, it is beneficial to increase the service life of the cage

[0017] Optionally, the bottom end of the valve body is the water inlet, and the top end of the valve body is the water outlet.

[0018] By adopting the above technical solution, it is beneficial to realize the circulation of liquid.

[0019] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0020] The technical solution of this application improves the material of the sleeve and adopts phosphor bronze with higher hardness, which has stronger corrosion resistance and wear resistance, effectively reducing the wear of the valve stem and the sleeve, and avoiding the phenomenon that the valve disc collides with the inner wall of the valve body when rising and falling due to the large gap between the valve stem and the sleeve. The sealing is stable, ensuring the unidirectional flow of the medium and the safe and stable operation of the system, which not only reduces the cost of purchasing new check valves, but also reduces the intensity of maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0022] Figure 1 This is a schematic cross-sectional view of the internal structure of the flange vertical check valve of the present invention;

[0023] Figure 2 This is a schematic top view of the internal structure of the flange vertical check valve of the utility model;

[0024] Figure 3 This is a bottom view schematic diagram of the internal structure of the flange vertical check valve of the utility model;

[0025] Figure 4 This is an enlarged schematic diagram of the A area structure of the internal structure of the flange vertical check valve of the present invention.

[0026] In the figure: 1. Flange; 2. Valve body; 3. Valve disc; 4. Bushing; 5. Retainer; 6. Mounting hole; 7. Valve stem; 8. Center hole. DETAILED DESCRIPTION

[0027] See also Figure 1-4 The utility model provides a technical solution: the internal structure of a flange vertical check valve includes a valve body 2, both ends of the valve body 2 are fixedly connected to a flange 1, the interior of the valve body 2 is fixedly connected to four retaining frames 5, a phosphor bronze sleeve 4 is fixedly connected between the four retaining frames 5, the middle of the sleeve 4 is slidably connected to a valve stem 7, and the bottom end of the valve stem 7 is fixedly connected to a valve disc 3.

[0028] In the technical solution of the present invention, not shown in the figure, the hardness of the shaft sleeve 4 made of phosphor bronze reaches 200HB-260HB, and the tensile strength reaches 290MPa-550Mpa; this is beneficial to reducing the wear of the shaft sleeve 4.

[0029] In the technical solution of the present utility model, Figure 4 As shown, a center hole 8 adapted to the valve stem 7 is opened at the middle position of the shaft sleeve 4; this is beneficial to reducing the gap between the shaft sleeve 4 and the valve stem 7.

[0030] In the technical solution of the present utility model, Figure 1 As shown, six mounting holes 6 are provided on the flange 1 , and the six mounting holes 6 are distributed in a ring shape, which is conducive to the installation of the valve body 2 .

[0031] In the technical solution of the present utility model, Figure 1 As shown, a spring is fixedly connected between the valve disc 3 and the shaft sleeve 4, and the spring is sleeved on the outside of the valve stem 7; it is beneficial to the resetting of the valve disc 3.

[0032] In the technical solution of the present invention, which is not shown in the figure, the retainer 5 is made of stainless steel metal material, which is beneficial to improving the service life of the retainer 5.

[0033] In the technical solution of the present utility model, Figure 1 As shown, the bottom end of the valve body 2 is the water inlet, and the top end of the valve body 2 is the water outlet; this is conducive to the circulation of liquid.

[0034] During use, by improving the material of the sleeve 4 and adopting phosphor bronze with higher hardness, it has stronger corrosion resistance and wear resistance, effectively reducing the wear of the valve stem 7 and the sleeve 4, and avoiding the phenomenon that the valve disc 3 collides with the inner wall of the valve body 2 when rising and falling due to the large gap between the valve stem 7 and the sleeve 4. The sealing is stable, ensuring the unidirectional flow of the medium and the safe and stable operation of the system, which not only reduces the cost of purchasing a new check valve, but also reduces the intensity of maintenance work.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. The internal structure of the flange vertical check valve is characterized by: The invention comprises a valve body (2), both ends of the valve body (2) are fixedly connected to flanges (1), the interior of the valve body (2) is fixedly connected to four retaining frames (5), a phosphor bronze shaft sleeve (4) is fixedly connected between the four retaining frames (5), a valve stem (7) is slidably connected in the middle of the shaft sleeve (4), and a valve flap (3) is fixedly connected to the bottom end of the valve stem (7).

2. The internal structure of the flange vertical check valve according to claim 1 is characterized in that: The hardness of the phosphor bronze shaft sleeve (4) reaches 200HB-260HB, and the tensile strength reaches 290MPa-550MPa.

3. The internal structure of the flange vertical check valve according to claim 1 is characterized in that: A center hole (8) adapted to the valve stem (7) is provided at the middle position of the shaft sleeve (4).

4. The internal structure of the flange vertical check valve according to claim 1 is characterized in that: Six mounting holes (6) are provided on the flange (1), and the six mounting holes (6) are distributed in a ring shape.

5. The internal structure of the flange vertical check valve according to claim 1, characterized in that: A spring is fixedly connected between the valve flap (3) and the shaft sleeve (4), and the spring sleeve is arranged outside the valve stem (7).

6. The internal structure of the flange vertical check valve according to claim 1, characterized in that: The retaining frame (5) is made of stainless steel metal.

7. The internal structure of the flange vertical check valve according to claim 1, characterized in that: The bottom end of the valve body (2) is a water inlet, and the top end of the valve body (2) is a water outlet.

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