CN221880303U - Butt welding type three-way diaphragm valve - Google Patents

Abstract

The utility model discloses a butt welding type three-way diaphragm valve, which relates to the technical field of industrial valve pipelines and comprises a valve body and a valve cover arranged above the valve body, wherein a driving device is arranged above the valve cover, the bottom of the driving device is connected with a valve clack, the lower part of the valve clack is connected with a second diaphragm, the driving device mainly comprises a valve rod, a hand wheel and a valve rod nut, the upper end of the valve rod is fixedly connected with the hand wheel, the lower end of the valve rod is fixedly connected with the valve clack through threads, and the valve rod nut is in sliding connection with the valve cover through threads; the inside of the valve body protrudes upwards to form a sealing weir groove, the valve body mainly comprises a water inlet, a first water outlet and a second water outlet, and the front end of the water inlet is provided with a filtering mechanism.

Description

A butt-welded three-way diaphragm valve

Technical Field

The utility model belongs to the technical field of industrial valve pipelines, and in particular relates to a butt-welded three-way diaphragm valve.

Background Art

Three-way valves usually achieve the functions of converging and diverting by changing the internal components of the valve. Three-way valves are divided into converging valves and diverting valves according to the fluid action mode. The converging valve has two inlets, and the fluid flows out from one outlet after converging. The diverting valve has one fluid inlet, and the fluid flows out from two fluid outlets after diversion. In the prior art, the three-way valve stem is usually prevented from leaking out through a stuffing box structure. Usually, the initial pre-tightening stress of the packing, that is, the sealing pressure ratio attenuation between the packing and the valve stem contact surface is caused by friction and wear of the packing after the valve has been working for a period of time, the temperature change of the medium, the stress of the fasteners and other factors.

To this end, Chinese patent application number CN2017214399660 discloses a fluorine-lined three-way diaphragm valve, which adopts a structure without a stuffing box, and the valve body and the valve cover are separated by the middle diaphragm, which can completely isolate the corrosive medium in the flow channel from all driving components such as the valve cover and valve stem above the diaphragm, thereby eliminating the drawbacks of "running, bubbling, dripping, and leaking" of ordinary valves. However, this kind of three-way diaphragm valve is easy to cause blockage due to the solid particles and impurities contained in the fluid medium gradually deposited in the flow channel during long-term use, affecting the use effect of the diaphragm valve.

In order to solve the above problems, the present application proposes a butt-welded three-way diaphragm valve.

Utility Model Content

In order to solve the technical problem in the prior art that, during long-term use, solid particles and impurities contained in the fluid medium of the existing three-way diaphragm valve are gradually deposited in the flow channel, which easily causes blockage and affects the use effect of the diaphragm valve, the utility model provides a butt-welded three-way diaphragm valve, and a filtering mechanism is provided at the water inlet end of the valve body to filter the solid particles, impurities, etc. contained in the fluid medium to prevent them from being deposited in the flow channel and easily causing blockage, and the filtering mechanism can be easily disassembled from the water inlet end for cleaning.

The technical solution adopted by the utility model to solve its technical problems is: a butt-welded three-way diaphragm valve, comprising a valve body and a valve cover installed above the valve body, a driving device is arranged above the valve cover, a valve disc is connected to the bottom of the driving device, a second diaphragm is connected to the bottom of the valve disc, and the edge of the second diaphragm is engaged with the connection between the valve body and the valve cover; the driving device is mainly composed of a valve stem, a hand wheel and a valve stem nut, the upper end of the valve stem is fixedly connected to the hand wheel, the lower end of the valve stem is fixedly connected to the valve disc by a thread, the valve stem nut is sleeved on the outer side of the valve stem, and the valve stem nut and the valve cover are slidably connected by a thread; the interior of the valve body protrudes upward to form a sealing weir groove, and the sealing weir groove is located directly below the second diaphragm; the valve body mainly comprises a water inlet, a first water outlet and a second water outlet, and a filtering mechanism is arranged at the front end of the water inlet.

The above-mentioned butt-welded three-way diaphragm valve, the water inlet mainly includes a front water pipe and a rear water pipe, and the front water pipe and the rear water pipe are fixedly connected by threads, a groove is opened at the front end of the front water pipe, and a retaining ring is provided on the inner side wall of the rear water pipe.

In the above-mentioned butt-welded three-way diaphragm valve, the filtering mechanism mainly includes a filter screen, a filter screen bracket and a convex groove. The edge of the filter screen is fixed on the filter screen bracket, and a convex groove corresponding to the groove is provided on one side of the filter screen bracket.

In the above-mentioned butt-welded three-way diaphragm valve, the sealing weir groove adopts an arc-shaped design structure, and a first diaphragm is arranged on the arc-shaped surface of the sealing weir groove.

In the above-mentioned butt-welded three-way diaphragm valve, the first diaphragm and the second diaphragm are both made of elastic material.

In the above-mentioned butt-welded three-way diaphragm valve, there is a bulge below the valve cover, and the bulge can wrap the edge where the valve body and the valve cover are connected.

In the above-mentioned butt-welded three-way diaphragm valve, a sealing gasket is installed at the connection between the filtering mechanism and the rear water inlet pipe.

The above technical solution of the utility model has the following beneficial technical effects:

1. The utility model is provided with a filtering mechanism at the water inlet end of the valve body to filter solid particles, impurities, etc. contained in the fluid medium to prevent them from being deposited in the flow channel and easily causing blockage, and the filtering mechanism is convenient to be disassembled from the water inlet end for cleaning.

2. The second diaphragm of the utility model adopts an elastic sealing opening and closing part, and the valve body sealing weir groove adopts an arc-shaped design structure to ensure that there is no internal leakage. The valve body and the valve cover are separated by the second diaphragm, so that the valve cover, valve stem and other parts above the diaphragm are not corroded by the medium, thereby extending their service life.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the overall structure of the utility model;

Figure 2 is a top view of the overall structure of the utility model;

FIG3 is a schematic diagram of the diaphragm valve of the utility model in an open state;

FIG. 4 is a schematic structural diagram of the filter mechanism and the water inlet of the utility model.

Reference numerals:

1. Valve body; 2. Valve cover; 21. Outer convexity; 3. First diaphragm; 4. Driving device; 41. Valve stem; 42. Hand wheel; 43. Valve stem nut; 5. Valve disc; 6. Second diaphragm; 7. Filter mechanism; 71. Filter screen; 72. Filter screen bracket; 73. Convex groove; 8. Water inlet; 81. Front water inlet pipe; 811. Concave groove; 82. Rear water inlet pipe; 821. Retaining ring; 9. First water outlet; 10. Second water outlet; 11. Sealing weir groove; 12. Sealing gasket.

DETAILED DESCRIPTION

In order to make the technical means, creative features, purpose and efficacy of the utility model easy to understand, the utility model is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the utility model. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings.

Figure 1 is a schematic diagram of the overall structure of the utility model. As shown in Figure 1, a butt-welded three-way diaphragm valve includes a valve body 1 and a valve cover 2 installed above the valve body 1, a driving device 4 is arranged above the valve cover 2, a valve disc 5 is connected to the bottom of the driving device 4, a second diaphragm 6 is connected to the bottom of the valve disc 5, and the edge of the second diaphragm 6 is engaged with the connection between the valve body 1 and the valve cover 2.

More specifically, the bottom of the valve cover 2 has a protrusion 21, and the protrusion 21 can wrap the edge where the valve body 1 and the valve cover 2 are connected, thereby preventing the edge of the second diaphragm 6 from being exposed to the air and preventing the second diaphragm 6 from shortening its service life due to oxidation.

The driving device 4 is mainly composed of a valve stem 41, a handwheel 42 and a valve stem nut 43. The upper end of the valve stem 41 is fixedly connected to the handwheel 42, the lower end of the valve stem 41 is fixedly connected to the valve disc 5 by a thread, the valve stem nut 43 is sleeved on the outside of the valve stem 41, and the valve stem nut 43 and the valve cover 2 are slidably connected by a thread.

In this embodiment, it should be noted that the driving device 4 is used to control the up and down movement of the second diaphragm 6, and the valve body 1 and the valve cover 2 are separated by the second diaphragm 6, so that the valve cover 2, valve stem 41 and other parts above the second diaphragm 6 are not corroded by the medium.

The interior of the valve body 1 protrudes upward to form a sealing weir groove 11, and the sealing weir groove 11 is located directly below the second diaphragm 6; the sealing weir groove 11 adopts an arc-shaped design structure, and the first diaphragm 3 is arranged on the arc-shaped surface of the sealing weir groove 11.

In this embodiment, it should be noted that by turning the hand wheel 42, the valve stem 41 is driven to move up and down, and the lower end of the valve stem 41 is fixedly connected to the valve disc 5 by a thread, thereby driving the valve disc 5 to move synchronously, and the lower part of the valve disc 5 is connected to the second diaphragm 6, and the edge of the second diaphragm 6 is engaged with the connection between the valve body 1 and the valve cover 2, thereby driving the second diaphragm 6 and the sealing weir groove 11 inside the valve body 1 to form a closure and flow, thereby realizing the passage switching of the fluid. As shown in FIG3, the second diaphragm 6 and the sealing weir groove 11 inside the valve body 1 are closed to form a closed state.

The valve body 1 mainly comprises a water inlet 8 , a first water outlet 9 and a second water outlet 10 , and a filtering mechanism 7 is arranged at the front end of the water inlet 8 .

In this embodiment, it should be noted that the solid particles, impurities and the like contained in the fluid medium are filtered by the filtering mechanism 7 to prevent them from being deposited in the flow channel and causing blockage.

As shown in Figure 4, the water inlet 8 mainly includes a front water pipe 81 and a rear water inlet pipe 82, and the front water pipe 81 and the rear water inlet pipe 82 are fixedly connected by threads. A groove 811 is provided at the front end of the front water pipe 81, and a retaining ring 821 is provided on the inner wall of the rear water inlet pipe 82.

More specifically, the filter mechanism 7 mainly includes a filter screen 71 , a filter screen bracket 72 and a convex groove 73 . The edge of the filter screen 71 is fixed on the filter screen bracket 72 . A convex groove 73 corresponding to the groove 811 is provided on one side of the filter screen bracket 72 .

In this embodiment, it should be noted that the filter screen 71 is fixedly installed in the groove 811 of the water inlet pipe 81 through the protruding groove 73 on one side of the filter screen bracket 72, the front water inlet pipe 81 and the rear water inlet pipe 82 are tightened, and the inner wall of the rear water inlet pipe 82 is provided with a retaining ring 821 to fix the filter mechanism 7, thereby facilitating disassembly, replacement and cleaning.

More specifically, the first diaphragm 3 and the second diaphragm 6 are both made of elastic material.

In the present embodiment, it should be noted that an elastic sealing opening and closing member is used, and the sealing weir groove 11 of the valve body 1 adopts an arc-shaped design structure, which can ensure that no internal leakage occurs.

More specifically, a sealing gasket 12 is installed at the connection between the filter mechanism 7 and the rear water inlet pipe 82 to prevent water leakage when the rear water inlet pipe 82 and the front water inlet pipe 81 are connected by threads.

The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims (7)

1. A butt-welded three-way diaphragm valve, comprising a valve body (1) and a valve cover (2) mounted above the valve body (1), characterized in that a driving device (4) is arranged above the valve cover (2), a valve flap (5) is connected to the bottom of the driving device (4), a second diaphragm (6) is connected to the bottom of the valve flap (5), and an edge of the second diaphragm (6) is engaged with the connection between the valve body (1) and the valve cover (2); The driving device (4) is mainly composed of a valve stem (41), a hand wheel (42) and a valve stem nut (43); the upper end of the valve stem (41) is fixedly connected to the hand wheel (42); the lower end of the valve stem (41) is fixedly connected to the valve disc (5) by means of a thread; the valve stem nut (43) is sleeved on the outer side of the valve stem (41); and the valve stem nut (43) and the valve cover (2) are slidably connected by means of a thread; The interior of the valve body (1) protrudes upward to form a sealing weir groove (11), and the sealing weir groove (11) is located directly below the second diaphragm (6); The valve body (1) mainly comprises a water inlet (8), a first water outlet (9) and a second water outlet (10), and a filtering mechanism (7) is provided at the front end of the water inlet (8). 2. A butt-welded three-way diaphragm valve according to claim 1, characterized in that the water inlet (8) mainly includes a front water pipe (81) and a rear water inlet pipe (82), and the front water pipe (81) and the rear water inlet pipe (82) are fixedly connected by threads, a groove (811) is provided at the front end of the front water pipe (81), and a retaining ring (821) is provided on the inner side wall of the rear water inlet pipe (82). 3. A butt-welded three-way diaphragm valve according to claim 2, characterized in that the filtering mechanism (7) mainly comprises a filter screen (71), a filter screen bracket (72) and a convex groove (73), the edge of the filter screen (71) is fixed on the filter screen bracket (72), and a convex groove (73) corresponding to the groove (811) is provided on one side of the filter screen bracket (72). 4. A butt-welded three-way diaphragm valve according to claim 1, characterized in that the sealing weir groove (11) adopts an arc-shaped design structure, and a first diaphragm (3) is arranged on the arc-shaped surface of the sealing weir groove (11). 5. A butt-welded three-way diaphragm valve according to claim 4, characterized in that the first diaphragm (3) and the second diaphragm (6) are both made of elastic material. 6. A butt-welded three-way diaphragm valve according to claim 1, characterized in that there is an outer protrusion (21) below the valve cover (2), and the outer protrusion (21) can wrap the edge where the valve body (1) and the valve cover (2) are connected. 7. A butt-welded three-way diaphragm valve according to claim 2, characterized in that a sealing gasket (12) is installed at the connection between the filtering mechanism (7) and the rear water inlet pipe (82).