High-sealing-performance fire-fighting indoor hydrant

Abstract

The utility model relates to the field of fire hydrants, in particular to a fire-fighting indoor hydrant with high sealing performance. The technical problem to be solved by the utility model is to provide the leakproof heightened rotary indoor fire hydrant which can perform multiple sealing to improve the sealing performance and prevent the phenomenon of water leakage after long-time use. A high-sealing-performance fire-fighting indoor hydrant comprises a hydrant body, a hydrant cover, a valve rod nut, a valve rod, a hand wheel, a pipe tooth connector, a first sealing valve clack, a first sealing seat ring, a connecting block, a connecting shaft, a second sealing valve clack, a second sealing seat ring and a fixing frame. According to the utility model, the effects of performing multiple sealing, improving the sealing performance and preventing the water leakage phenomenon after long-time use are achieved.

Description

Technical Field

[0001] The utility model relates to the field of fire hydrants, in particular to a fire hydrant with high sealing performance. Background Art

[0002] Indoor fire hydrants are interfaces with valves that supply water to the fire scene through indoor pipe networks. They are fixed indoor fire-fighting facilities in factories, warehouses, high-rise buildings, public buildings and ships. They are usually installed in fire hydrant boxes and used in conjunction with fire hoses and water guns. The basic structure is that there are water outlets on both sides and the front of the hydrant body, and a valve stem is installed in the hydrant body, with one end extending out of the hydrant top and the other end connected to the bottom valve. In the event of an emergency fire, just turn the valve stem and open the valve, and water will gush out from the water outlet.

[0003] At present, most indoor fire hydrants are not sealed tightly enough. After long-term use, the sealing effect of the sealing valve disc and the sealing seat ring is easily weakened, resulting in water leakage, which is very inconvenient to use. Therefore, it is urgent to develop a leak-proof elevated rotating indoor fire hydrant that can perform multiple seals to improve the sealing performance and prevent water leakage after long-term use. Utility Model Content

[0004] In order to overcome the shortcomings that most of the current indoor fire hydrants are not sealed tightly enough, and the sealing effect of the sealing valve disc and the sealing seat ring is easily weakened after long-term use, resulting in water leakage, the technical problem to be solved by the utility model is to provide a leakage-proof elevated rotating indoor fire hydrant that can perform multiple seals to improve the sealing performance and prevent water leakage after long-term use.

[0005] The utility model is achieved by the following specific technical means:

[0006] A high-sealing performance indoor hydrant for fire fighting comprises a bolt body, a cavity is arranged at the center of the bolt body, a water outlet is arranged at the upper end, and a water inlet is arranged at the lower end; a bolt cover is fixedly installed on the upper end of the bolt body by bolts; a mounting through hole is arranged at the center of the valve cover, and a valve stem nut is fixedly installed in the mounting through hole; a valve stem is also arranged in the mounting through hole at the center of the valve cover, and the valve stem is meshed and connected with the valve stem nut through a thread, and one end of the valve stem extends into the central cavity of the bolt body, and the other end extends above the bolt cover; a hand wheel is arranged at the upper end of the valve stem, and the hand wheel is fixedly connected to the valve stem by bolts; a pipe thread interface is arranged at the water outlet on one side of the upper end of the bolt body, and the pipe thread interface is fixedly connected to the bolt body by bolts; a first sealing valve disc is arranged in the central cavity of the bolt body, and the first sealing valve disc is fixedly connected to the lower end of the valve stem by a pin; a first sealing seat ring is arranged below the first sealing valve disc, and the first sealing seat ring is fixedly installed in the cavity arranged in the bolt body;

[0007] A connecting block is protrudingly provided on the lower end surface of the first sealing valve disc, and a mounting hole is provided in the center of the connecting block; a connecting shaft is provided at the lower end of the connecting block, and the connecting shaft is fixedly installed in the mounting hole of the connecting block through a pin, and a thread is provided on the outer diameter surface of the lower end of the connecting shaft; a second sealing valve disc is provided at the lower end of the connecting shaft, and a threaded hole is provided in the center of the second sealing valve disc, and the second sealing valve disc is meshed and connected with the thread provided on the connecting shaft through the threaded hole; a second sealing seat ring is provided above the second sealing valve disc, and the second sealing seat ring is fixedly installed in the cavity provided by the bolt body; a fixing frame for limiting and guiding the second sealing valve disc is provided at the end of the second sealing valve disc, and the fixing frame is fixedly connected to the bolt body.

[0008] Furthermore, the second sealing valve disc includes a sealing plate that cooperates with the second sealing seat ring for sealing; a guide rod is fixedly arranged at the lower end of the sealing plate; a limit block is protrudingly arranged on the outer diameter surface of the guide rod; a guide hole that slides with the guide rod is arranged at the center of the fixed frame, a limit groove that slides with the limit block is arranged on the inner diameter surface of the guide hole, and a plurality of water grooves are evenly and equidistantly arranged on the fixed frame.

[0009] Furthermore, the rotation direction of the thread on the valve stem is opposite to that of the thread on the outer diameter surface of the connecting shaft; when the valve stem drives the first sealing valve disc to move upward, the connecting shaft can drive the second sealing valve disc to move downward.

[0010] Furthermore, the thread pitch of the thread provided on the outer diameter surface of the connecting shaft is twice the thread pitch of the thread provided on the valve stem; when the valve stem rotates one circle and drives the first sealing valve disc to move upward by a pitch n, the connecting shaft can drive the second sealing valve disc to move downward by a pitch 2n, thereby compensating for the connecting shaft moving upward by a pitch n in the process of following the first sealing valve plate to rotate one circle, so that the upward movement distance of the first sealing valve disc is equal to the downward movement distance of the second sealing valve.

[0011] Furthermore, the lower end surface of the first sealing valve disc and the upper end surface of the second sealing seat ring are sealing surfaces, which are respectively sealed with the first sealing seat ring and the second sealing seat ring.

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

[0013] The utility model achieves the effect of performing multiple seals to improve the sealing performance and prevent water leakage after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0016] Figure 3It is a schematic diagram of a partial three-dimensional structure of the utility model.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the second sealing valve disc of the utility model.

[0018] Figure 5 It is a schematic diagram of the three-dimensional structure of the fixing frame of the utility model.

[0019] The marks in the accompanying drawings are: 1-bolt body, 2-bolt cover, 3-valve stem nut, 4-valve stem, 5-handwheel, 6-tube thread interface, 7-first sealing valve disc, 8-first sealing seat ring, 9-connecting block, 10-connecting shaft, 11-second sealing valve disc, 12-second sealing seat ring, 13-fixing frame, 111-sealing plate, 112-guide rod, 113-limiting block, 131-water trough, 132-guide hole, 133-limiting groove. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] A high sealing performance fire indoor hydrant, such as Figure 1-5 As shown, it includes a bolt body 1, a cavity is arranged in the center of the bolt body 1, a water outlet is arranged at the upper end, and a water inlet is arranged at the lower end; a bolt cover 2 is fixedly installed on the upper end of the bolt body 1 by bolts; a mounting through hole is arranged in the center of the valve cover, and a valve stem nut 3 is fixedly installed in the mounting through hole; a valve stem 4 is also arranged in the mounting through hole in the center of the valve cover, and the valve stem 4 is meshed and connected with the valve stem nut 3 through a thread, and one end of the valve stem 4 extends into the central cavity of the bolt body 1, and the other end extends to the top of the bolt cover 2; a hand wheel 5 is arranged on the upper end of the valve stem 4, and the hand wheel 5 is fixedly connected to the valve stem 4 by bolts; a pipe thread interface 6 is arranged at the water outlet on one side of the upper end of the bolt body 1, and the pipe thread interface 6 is fixedly connected to the bolt body 1 by bolts; a first sealing valve disc 7 is arranged in the central cavity of the bolt body 1, and the first sealing valve disc 7 is fixedly connected to the lower end of the valve stem 4 by a pin; a first sealing seat ring 8 is arranged below the first sealing valve disc 7, and the first sealing seat ring 8 is fixedly installed in the cavity arranged in the bolt body 1;

[0022] A connecting block 9 is protrudingly provided on the lower end surface of the first sealing valve disc 7, and a mounting hole is provided in the center of the connecting block 9; a connecting shaft 10 is provided at the lower end of the connecting block 9, and the connecting shaft 10 is fixedly installed in the mounting hole provided in the connecting block 9 by a pin, and a thread is provided on the outer diameter surface of the lower end of the connecting shaft 10; a second sealing valve disc 11 is provided at the lower end of the connecting shaft 10, and a threaded hole is provided in the center of the second sealing valve disc 11, and the second sealing valve disc 11 is meshed and connected with the thread provided on the connecting shaft 10 through the threaded hole; a second sealing seat ring 12 is provided above the second sealing valve disc 11, and the second sealing seat ring 12 is fixedly installed in the cavity provided in the bolt body 1; a fixing frame 13 for limiting and guiding the second sealing valve disc 11 is provided at the end of the second sealing valve disc 11, and the fixing frame 13 is fixedly connected to the bolt body 1;

[0023] The second sealing valve flap 11 includes a sealing plate 111 that cooperates with the second sealing seat ring 12 for sealing; a guide rod 112 is fixedly arranged at the lower end of the sealing plate 111; a limit block 113 is protrudingly arranged on the outer diameter surface of the guide rod 112; a guide hole 132 that slidably cooperates with the guide rod 112 is arranged at the center of the fixing frame 13, a limit groove 133 that slidably cooperates with the limit block 113 is arranged on the inner diameter surface of the guide hole 132, and a plurality of water grooves 131 are evenly and equidistantly arranged on the fixing frame 13.

[0024] Working principle:

[0025] The fire hose is connected to the pipe thread interface 6 of the fire hydrant through the buckle. When in use, the valve stem 4 is rotated by turning the hand wheel 5, and the valve stem 4 moves upward to drive the first sealing valve disc 7 fixedly connected to the valve stem 4 to rotate and move upward; thereby, the lower end surface of the first sealing valve disc 7 is separated from the first sealing seat ring 8, and the opening between the first sealing valve disc 7 and the first sealing seat ring 8 is opened; at the same time, when the first sealing valve disc 7 rotates and moves upward, the first sealing valve disc 7 drives the lower end connecting shaft 10 to rotate and move upward, and the rotation of the connecting shaft 10 drives the second sealing valve disc 11 meshed therewith to move downward along the guide groove of the fixing frame 13; the thread pitch set on the outer diameter surface of the connecting shaft 10 is twice the thread pitch set on the valve stem 4; the valve stem 4 rotates one circle to drive the first sealing valve disc 7 to move upward When the connecting shaft 10 moves a pitch n, the second sealing valve disc 11 can move downward a pitch 2n, thereby compensating for the connecting shaft 10 driving the second sealing valve disc 11 to move upward a pitch n in the process of following the first sealing valve plate to rotate one circle, so that the upward movement distance of the first sealing valve disc 7 is equal to the downward movement distance of the second sealing valve; thereby, the upper end surface of the second sealing valve plate is separated from the second sealing seat ring 12, and the opening between the second sealing valve disc 11 and the second sealing seat ring 12 is opened; water flows in from the water supply pipe, passes through the water groove 131 on the fixing frame 13, passes through the opening between the first sealing valve disc 7 and the first sealing seat ring 8 and the opening between the second sealing valve disc 11 and the second sealing seat ring 12, and finally flows into the fire hose through the water outlet to extinguish the fire.

[0026] After use, the hand wheel 5 is turned to make the valve stem 4 drive the first sealing valve disc 7 to move downward, and the lower end surface of the first sealing valve disc 7 fits with the first sealing seat ring 8. At the same time, the connecting shaft 10 rotates to drive the second sealing valve disc 11 to move upward, and the lower end surface of the second sealing valve disc 11 fits with the second sealing seat ring 12; through the fitting seal between the first sealing valve disc 7 and the first sealing seat ring 8 and the fitting seal between the second sealing valve disc 11 and the second sealing seat ring 12, a double sealing effect is achieved, thereby improving the sealing performance.

[0027] Although the present disclosure has been described in detail with reference to the exemplary embodiments, the present disclosure is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made thereto without departing from the scope of the present disclosure.

Claims

1. A fire hydrant with high sealing performance, comprising a hydrant body (1), wherein the hydrant body (1) is provided with a cavity at the center, a water outlet at the upper end and a water inlet at the lower end; a hydrant cover (2) is fixedly mounted on the upper end of the hydrant body (1) by means of bolts; a mounting through hole is provided at the center of the valve cover, a valve stem nut (3) is fixedly mounted in the mounting through hole; a valve stem (4) is also provided in the mounting through hole at the center of the valve cover, the valve stem (4) is meshedly connected with the valve stem nut (3) by means of a thread, and one end of the valve stem (4) extends into the central cavity of the hydrant body (1), and the other end extends to the upper end of the hydrant cover (2). The valve stem (4) is provided with a hand wheel (5) at the upper end thereof, and the hand wheel (5) is fixedly connected to the valve stem (4) by means of bolts; a pipe thread interface (6) is provided at a water outlet on one side of the upper end of the bolt body (1), and the pipe thread interface (6) is fixedly connected to the bolt body (1) by means of bolts; a first sealing valve disc (7) is provided in the central cavity of the bolt body (1), and the first sealing valve disc (7) is fixedly connected to the lower end of the valve stem (4) by means of pins; a first sealing seat ring (8) is provided below the first sealing valve disc (7), and the first sealing seat ring (8) is fixedly installed in the cavity provided in the bolt body (1); It is characterized in that A connecting block (9) is protrudingly provided on the lower end surface of the first sealing valve flap (7), and a mounting hole is provided at the center of the connecting block (9); a connecting shaft (10) is provided at the lower end of the connecting block (9), and the connecting shaft (10) is fixedly installed in the mounting hole provided in the connecting block (9) by means of a pin, and a thread is provided on the outer diameter surface of the lower end of the connecting shaft (10); a second sealing valve flap (11) is provided at the lower end of the connecting shaft (10), and a threaded hole is provided at the center of the second sealing valve flap (11), and the second sealing valve flap (11) is meshedly connected with the thread provided on the connecting shaft (10) through the threaded hole; a second sealing seat ring (12) is provided above the second sealing valve flap (11), and the second sealing seat ring (12) is fixedly installed in a cavity provided in the bolt body (1); a fixing frame (13) for limiting and guiding the second sealing valve flap (11) is provided at the end of the second sealing valve flap (11), and the fixing frame (13) is fixedly connected to the bolt body (1).

2. A fire hydrant with high sealing performance according to claim 1, characterized in that: The second sealing valve flap (11) comprises a sealing plate (111) which cooperates with the second sealing seat ring (12) for sealing; a guide rod (112) is fixedly arranged at the lower end of the sealing plate (111); a limit block (113) is protrudingly arranged on the outer diameter surface of the guide rod (112); a guide hole (132) which slidably cooperates with the guide rod (112) is arranged at the center of the fixing frame (13); a limit groove (133) which slidably cooperates with the limit block (113) is arranged on the inner diameter surface of the guide hole (132); and a plurality of water passage grooves (131) are evenly and equidistantly arranged on the fixing frame (13).

3. A fire hydrant with high sealing performance according to claim 1, characterized in that: The rotation direction of the thread provided on the valve stem (4) is opposite to the rotation direction of the thread provided on the outer diameter surface of the connecting shaft (10).

4. A fire hydrant with high sealing performance according to claim 1, characterized in that: The pitch of the thread provided on the outer diameter surface of the connecting shaft (10) is twice the pitch of the thread provided on the valve stem (4).

5. The high sealing performance fire hydrant according to claim 1, characterized in that: The lower end surface of the first sealing valve disc (7) and the upper end surface of the second sealing seat ring (12) are sealing surfaces, which are respectively in sealing cooperation with the first sealing seat ring (8) and the second sealing seat ring (12).

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