Internal rotation type check valve

Abstract

The utility model relates to the technical field of check valves, in particular to an internal rotation type check valve which comprises an internal rotation type check valve body, a plurality of bolts are arranged on the internal rotation type check valve body, the internal rotation type check valve body is connected with a filter box through the bolts, a sliding rail is arranged on the inner wall of the filter box, and the sliding rail is connected with the filter box through the bolts. A filter screen is slidably connected to the inner wall of the sliding rail, a pressing cover is arranged at the top end of the filter screen, a connecting threaded pipe is arranged on the outer wall of the right side of the filter box, and a connecting cap is in threaded connection to the connecting threaded pipe. Through cooperation of the filter box, the filter screen and the pressing cover, impurities in water flow can be blocked by the filter screen when the water flow passes through the filter box, so that the impurities in the water are less, the filter screen can be replaced in time when being blocked, the filtering efficiency is higher, and after the filter box is arranged, the water flow can be conveniently filtered. The flowing efficiency of water flow is higher, and abrasion to the internal structure of the check valve and shortening of the service life of the check valve are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to an inward-rotating check valve. Background Art

[0002] As an important fluid control component, internal swing check valves are widely used in various industrial systems to prevent backflow of media and ensure stable system operation. With the continuous advancement of industrial technology and changes in market demand, the design and performance of internal swing check valves are also being continuously optimized and improved.

[0003] Application number CN201220288482.1 discloses an internally rotating check valve comprising a valve body, a valve cover, a valve seat, a valve disc, and a rocker. The valve cover is positioned on the valve body, the valve seat is positioned in the middle of the valve body's flow passage, the valve disc is connected to one end of the rocker, and the other end of the rocker is sleeved onto a rotating shaft. A groove is provided above the valve seat in the inner cavity of the valve body, and the rotating shaft is positioned within the groove. A gap is left between the ends of the rotating shaft and the inner wall of the groove, and a pressure column is positioned above the rotating shaft. The inner surface of the valve seat and the outer surface of the valve disc form corresponding conical surfaces. An annular groove is formed on the outer surface of the valve disc, and a sealing ring is installed in the annular groove. The sealing surfaces of the valve cover and valve body are respectively provided with corresponding wedge blocks and wedge grooves, and gaskets are positioned within the wedge grooves.

[0004] In actual applications of the above patent, the fluid often contains various impurities, such as particles, fibers, sediments, etc. The presence of these impurities may not only affect the flow efficiency of the fluid, but also cause wear on the internal structure of the check valve and shorten its service life. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an internal rotation check valve.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An inward-swinging check valve comprises an inward-swinging check valve body, the inward-swinging check valve body is provided with a plurality of bolts, the inward-swinging check valve body is connected to a filter box via bolts, the inner wall of the filter box is provided with a slide rail, the inner wall of the slide rail is slidably connected to a filter screen, a tightening cover is provided on the top of the filter screen, a connecting threaded pipe is provided on the right outer wall of the filter box, a connecting cap is threadedly connected to the connecting threaded pipe, a shielding ring is provided on the left outer wall of the filter box, a waterproof pad is provided on the inner wall of the shielding ring, and a first threaded hole identical to that on the water inlet of the inward-swinging check valve body is provided on the waterproof pad.

[0008] In order to better achieve the above purpose, the present invention adopts a further technical solution: a groove is provided at the bottom end of the inner wall of the filter box, and the filter screen is slidably connected to the groove.

[0009] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: four evenly distributed second threaded holes are provided at the top of the filter box, the bottom end of the clamping cover is fixedly connected to a fixed block, the middle end of the fixed block is provided with a slide groove, the top end of the inner wall of the slide groove is fixedly connected to one end of a spring, the inner wall of the slide groove is slidably connected to an extrusion plate, the fixed block is slidably connected to the inner wall of the filter box, the other end of the spring is fixedly connected to the top end of the extrusion plate, and the bottom end of the extrusion plate is against the top end of the filter screen.

[0010] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: a connecting ring is fixedly connected to the outer wall of the connecting cap, and four evenly distributed connecting holes are opened on the outer wall of the connecting cap.

[0011] The beneficial effects of the utility model are:

[0012] Through the cooperation between the filter box, the filter screen and the pressing cover, when the water flows through the filter box, the impurities in the water flow can be blocked by the filter screen, so that there are fewer impurities in the water. The filter screen can also be replaced in time when it is blocked, and the filtration efficiency is higher. Therefore, after the filter box is set, the flow efficiency of the water flow is higher, avoiding wear on the internal structure of the check valve and shortening its service life.

[0013] By providing connecting threaded pipes and connecting caps of different models, the internal rotating check valve can be replaced with connecting caps of different models when encountering pipes of different diameters, thereby greatly increasing its practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the internal rotating check valve proposed by the present invention;

[0015] Figure 2 This is a schematic diagram of the half-section three-dimensional structure of the internal rotating check valve proposed in the present invention;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the filter box of the internal rotating check valve proposed in the present invention;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the filter box of the internal rotating check valve proposed by the present invention after the filter screen is installed;

[0018] Figure 5 This is a schematic diagram of the three-dimensional structure of the compression cover of the internal rotating check valve proposed in the present invention;

[0019] Figure 6 This is a schematic diagram of the three-dimensional structure of the connecting cap of the internal rotating check valve proposed by the present invention.

[0020] In the figure: 1. Inward-rotating check valve body; 2. Bolt; 3. Filter box; 4. Slide rail; 5. Filter screen; 6. Holding cover; 7. Connecting threaded pipe; 8. Connecting cap; 9. Shielding ring; 10. Waterproof pad; 11. First threaded hole; 12. Groove; 13. Second threaded hole; 14. Fixing block; 15. Slide groove; 16. Spring; 17. Extrusion plate; 18. Connecting ring; 19. Connecting hole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] Reference Figures 1-6 As shown, the inward-swinging check valve comprises an inward-swinging check valve body 1, characterized in that a plurality of bolts 2 are provided on the inward-swinging check valve body 1, the inward-swinging check valve body 1 is connected to a filter box 3 by the bolts 2, the inner wall of the filter box 3 is provided with a slide rail 4, the inner wall of the slide rail 4 is slidably connected to a filter screen 5, the top of the filter screen 5 is provided with a pressing cover 6, the right outer wall of the filter box 3 is provided with a connecting threaded pipe 7, the connecting threaded pipe 7 is threadedly connected to a connecting cap 8, the inward-swinging check valve body 1 and the filter screen 5 are existing technologies, and the specific model specifications need to be based on The selection is determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it is not repeated here. The left outer wall of the filter box 3 is provided with a shielding ring 9, and the inner wall of the shielding ring 9 is provided with a waterproof pad 10. The outer wall of the filter box 3 is provided with a first threaded hole 11 that is the same as the water inlet of the internal rotating check valve body 1. The shielding ring 9 is slidably connected to the outer wall of the water inlet of the internal rotating check valve body 1, and the bolt 2 passes through the hole on the water inlet and is connected to the first threaded hole 11. The waterproof pad 10 is also provided with a hole of the same size and position as the first threaded hole 11.

[0023] A groove 12 is provided at the bottom end of the inner wall of the filter box 3, and the filter screen 5 is slidably connected to the groove 12. The groove 12 is located in the middle of the slide rail 4 and its size is the same as the inner wall size of the slide rail 4, so that the filter screen 5 can directly enter the groove 12 along the slide rail 4.

[0024] Four evenly distributed second threaded holes 13 are provided at the top of the filter box 3, a fixing block 14 is fixedly connected to the bottom end of the pressing cover 6, a slide groove 15 is provided at the middle end of the fixing block 14, one end of a spring 16 is fixedly connected to the top of the inner wall of the slide groove 15, an extrusion plate 17 is slidably connected to the inner wall of the slide groove 15, and the outer wall of the slide rail 4 is provided with an inclined slope toward the side of the filter screen 5, so that the water flows to the filter screen 5 more smoothly.

[0025] The fixing block 14 is slidably connected to the inner wall of the filter box 3, the other end of the spring 16 is fixedly connected to the top of the extrusion plate 17, the bottom end of the extrusion plate 17 is against the top of the filter screen 5, the bottom end of the fixing block 14 is against the top of the slide rail 4, the bolt 2 passes through the outer wall of the clamping cover 6 and is threadedly connected to the second threaded hole 13, and the bolts 2 in this device uniformly use the same diameter.

[0026] The outer wall of the connecting cap 8 is fixedly connected with a connecting ring 18 . The outer wall of the connecting cap 8 is provided with four evenly distributed connecting holes 19 . The inner wall of the connecting ring 18 is provided with an internal thread so that the connecting ring 18 can be threadedly connected to the connecting threaded pipe 7 .

[0027] When the present invention is used, first install the waterproof pad 10 into the shielding ring 9, and then connect the water inlet of the internal rotating check valve body 1 with the filter box 3 through the bolt 2. Pay attention to the correspondence between the first threaded hole 11 and the hole on the water inlet. Then select a suitable connecting cap 8, connect the end with the connecting ring 18 to the connecting threaded cap 7, wrap the sealing tape at the connection, and then connect it to the water pipe. After long-term use, the filter screen 5 will be clogged. At this time, you can unscrew the bolt 2 on the tightening cover 6, remove the tightening cover 6 from the filter box 3, and then remove the filter screen 5 from the slide rail 4. After replacing the new filter screen 5, insert it into the slide rail 4 until it is against the bottom end of the groove 12, and then align the extrusion plate 17 with the filter screen 5 and install it, and then reinstall the bolt 2.

Claims

1. An inward-rotating check valve, comprising an inward-rotating check valve body (1), characterized in that: The inner-rotating check valve body (1) is provided with a plurality of bolts (2), the inner-rotating check valve body (1) is connected to a filter box (3) via the bolts (2), the inner wall of the filter box (3) is provided with a slide rail (4), the inner wall of the slide rail (4) is slidably connected to a filter screen (5), the top of the filter screen (5) is provided with a pressing cover (6), the right outer wall of the filter box (3) is provided with a connecting threaded pipe (7), the connecting threaded pipe (7) is threadedly connected to a connecting cap (8), the left outer wall of the filter box (3) is provided with a shielding ring (9), the inner wall of the shielding ring (9) is provided with a waterproof pad (10), and the waterproof pad (10) is provided with a first threaded hole (11) identical to that on the water inlet of the inner-rotating check valve body (1).

2. The internal rotation check valve according to claim 1, characterized in that: A groove (12) is provided at the bottom end of the inner wall of the filter box (3), and the filter screen (5) is slidably connected to the groove (12).

3. The internal rotation check valve according to claim 1, characterized in that: The top of the filter box (3) is provided with four evenly distributed second threaded holes (13), the bottom end of the pressing cover (6) is fixedly connected to a fixing block (14), the middle end of the fixing block (14) is provided with a slide groove (15), the top end of the inner wall of the slide groove (15) is fixedly connected to one end of a spring (16), the inner wall of the slide groove (15) is slidably connected to an extrusion plate (17), the fixing block (14) is slidably connected to the inner wall of the filter box (3), the other end of the spring (16) is fixedly connected to the top end of the extrusion plate (17), and the bottom end of the extrusion plate (17) is against the top end of the filter screen (5).

4. The internal rotation check valve according to claim 1, characterized in that: A connecting ring (18) is fixedly connected to the outer wall of the connecting cap (8), and four evenly distributed connecting holes (19) are formed on the outer wall of the connecting cap (8).

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