Civil gas pipeline water stop valve

Abstract

The utility model provides a civil gas pipeline water stop valve, which comprises a valve body, a stop rod and a piston, the stop rod is fixedly connected with the middle part of one side of the piston, the stop rod and the piston are connected in the valve body in a sliding manner, the valve body comprises a flow guide part and a plugging part, the flow guide part is fixedly clamped with the plugging part, and the plugging part is fixedly clamped with the flow guide part. The stop rod is connected into the flow guide part in a sliding mode, and the piston is connected into the plugging part in a sliding mode. Compared with the prior art, the check valve has the following beneficial effects that when the check valve is used and during normal gas ventilation, gas can circulate through a gap between the check rod and the valve body as well as a gap between the piston and the valve body, when a water pipe is connected wrongly, water flow impacts the piston when passing through the valve body, and the piston blocks the circulating hole in the valve body, so that the water flow cannot pass through the valve body.

Description

Technical Field

[0001] The utility model relates to a civil gas pipeline water stop valve, belonging to the field of gas. Background Art

[0002] Gas is a general term for gaseous fuels, which can burn and release heat for use by residents and industrial enterprises. In today's society, more and more residential areas and communities are using gas pipes to replace traditional gas cylinders, and directly connect the gas pipes to the house's gas stoves, water heaters, etc.

[0003] However, when installing civil gas pipes, workers are prone to misconnecting the gas pipes and water pipes, which can cause tap water to enter the gas pipes. Not only will this prevent residents from using gas normally, it will also cause the tap water to affect the entire gas supply network. At the same time, the structural connections between existing water stop valves are not stable enough, making it impossible for the stop valves to be used for a long time. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a water stop valve for civil gas pipelines.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A civil gas pipeline water stop valve comprises a valve body, a shut-off rod and a piston, wherein the shut-off rod is fixedly connected to the middle part of one side of the piston, the shut-off rod and the piston are slidably connected in the valve body, the valve body comprises a guide part and a blocking part, the guide part is fixedly engaged with the blocking part, the shut-off rod is slidably connected in the guide part, and the piston is slidably connected in the blocking part.

[0007] Furthermore, the guide part includes a rotating member and a connecting member, the rotating member and the connecting member are connected and fixed by a plurality of connecting plates, a flow hole 1 is opened in the middle of the rotating member, and the cut-off rod is slidably connected in the flow hole 1.

[0008] Furthermore, the sealing part is an annular structure, a second flow hole is opened inside the sealing part, the second flow hole cooperates with the piston, an external sealing ring is provided on the outside of the sealing part, and the external sealing ring is squeezed together with the inner wall of the gas pipeline.

[0009] Furthermore, an internal sealing ring is provided at the junction of the second flow hole and the guide portion, and the internal sealing ring is sealed between the connecting piece and the blocking portion.

[0010] Beneficial effects of the utility model:

[0011] When the present invention is in use, during normal gas ventilation, the gas can flow through the gap between the shut-off rod and the piston and the valve body. When the water pipe is connected incorrectly, the water flow will impact the piston when passing through the valve body, and the piston will block the flow hole on the valve body, so that the water flow cannot pass through the valve body.

[0012] The design of the external sealing ring improves the sealing performance between the valve body and the gas pipeline.

[0013] The design of the internal sealing ring improves the sealing between the connector and the sealing part.

[0014] Through the design of the guide part and the blocking part, the guide part provides a movable space for the cut-off rod, the blocking part provides a movable space for the piston, and the piston slides between the guide part and the blocking part, so that the cut-off rod and the blocking part can both slide stably.

[0015] Through the design of the clamping mechanism, before the fixed ring is inserted into the receiving groove, the rotating ring is rotated, and the rotation of the rotating ring drives several inclined surface protrusions to rotate synchronously. During the rotation of the inclined surface protrusion, the bottom side of the claw will be pushed by the inclined surface, and then the claw will be pushed to rotate, so that the end of the claw will rotate from the receiving groove to the movable groove. During the rotation, the claw will push the sliding seat to move into the inside of the rectangular frame, and the sliding seat will squeeze the spring during the movement. After the fixed ring is inserted into the receiving groove, the rotating ring is released. At this time, under the action of the spring, the claw resets and rotates, so that the end of the claw can be clamped in the slot on the fixed ring, and the rotating ring also resets and rotates to the initial position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a civil gas pipeline water stop valve of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a water stop valve for civil gas pipelines in a bottom view according to the utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure of a stop rod and a piston of a water stop valve for a civil gas pipeline of the utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure between the plugging part and the clamping mechanism of a water stop valve for a civil gas pipeline of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of a clamping mechanism of a water stop valve for a civil gas pipeline according to the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of a sliding seat of a water stop valve for a civil gas pipeline according to the utility model;

[0023] Figure 7 The utility model is a schematic diagram of the connection structure between the rotating ring and the inclined surface protrusion of a civil gas pipeline water stop valve.

[0024] In the figure, 1, cut-off rod; 2, piston; 3, guide part; 4, blocking part; 5, rotating part; 6, connecting part; 7, connecting plate; 8, circulation hole 1; 9, circulation hole 2; 10, external sealing ring; 11, internal sealing ring; 12, fixing ring; 13, clamping groove; 14, accommodating groove; 15, movable groove; 16, fixed shaft; 17, clamping claw; 18, rectangular frame; 19, spring; 20, sliding seat; 21, rotating ring; 22, limiting ring; 23, limiting groove; 24, inclined surface protrusion. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-7 The utility model provides a technical solution for a civil gas pipeline water stop valve, a civil gas pipeline water stop valve, comprising a valve body, a shut-off rod 1 and a piston 2, the shut-off rod 1 and the middle part of one side of the piston 2 are connected and fixed, the shut-off rod 1 and the piston 2 are slidably connected in the valve body, the valve body comprises a guide part 3 and a blocking part 4, the guide part 3 and the blocking part 4 are clamped and fixed by a clamping mechanism, the shut-off rod 1 is slidably connected in the guide part 3, and the piston 2 is slidably connected in the blocking part 4; when the present invention is in use, during normal gas ventilation, the gas can flow through the gap between the shut-off rod 1 and the piston 2 and the valve body, when the water pipe is connected incorrectly, the water flow will impact the piston 2 when passing through the valve body, and the piston 2 will block the flow hole on the valve body, so that the water flow cannot pass through the valve body.

[0027] See also Figure 1-4The guide part 3 includes a rotating member 5 and a connecting member 6, and the rotating member 5 and the connecting member 6 are connected and fixed by a plurality of connecting plates 7. A flow hole 1 8 is provided in the middle of the rotating member 5, and the cut-off rod 1 is slidably connected in the flow hole 1 8. The blocking part 4 is an annular structure, and a flow hole 2 9 is provided inside the blocking part 4, and the flow hole 2 9 cooperates with the piston 2. An external sealing ring 10 is provided on the outside of the blocking part 4, and the external sealing ring 10 is squeezed together with the inner wall of the gas pipeline; through the design of the guide part 3 and the blocking part 4, the guide part 3 provides a movable space for the cut-off rod 1, and the blocking part 4 provides a movable space for the piston 2, and the piston 2 slides between the guide part 3 and the blocking part 4, so that the cut-off rod 1 and the blocking part 4 can both slide stably.

[0028] See also Figure 4 An internal sealing ring 11 is provided at the junction of the flow hole 2 9 and the guide part 3 , and the internal sealing ring 11 seals between the connecting piece 6 and the blocking part 4 ; through the design of the internal sealing ring 11 , the sealing performance between the connecting piece 6 and the blocking part 4 is improved.

[0029] See also Figure 5-7, the clamping mechanism includes a fixed ring 12 fixed to the bottom of the connecting member 6, a plurality of clamping grooves 13 are evenly provided on the outer surface of the fixed ring 12 in the circumferential direction, a receiving groove 14 is provided on the top of the blocking portion 4, a movable groove 15 is connected to the bottom of the receiving groove 14, and an annular opening penetrating to the outer surface of the blocking portion 4 is provided on the movable groove 15, a plurality of fixed shafts 16 are evenly fixed inside the movable groove 15, the fixed shaft 16 corresponds to the clamping groove 13, a clamping claw 17 is rotatably connected to the fixed shaft 16, one end of the clamping claw 17 is clamped in the clamping groove 13, the clamping mechanism also includes a plurality of rectangular frames 18 fixed in the movable groove 15 and a rotating ring 21 rotatably connected to the annular opening, the rectangular frame 18 corresponds to the clamping claw 17, a sliding seat 20 is slidably connected at the opening of the rectangular frame 18, a spring 19 is provided between one end of the sliding seat 20 and the inner wall of the rectangular frame 18, and the other end of the sliding seat 20 is provided with a spring 19. One end is squeezed together with the claw 17, and a plurality of inclined surface protrusions 24 are evenly provided on the inner wall of the rotating ring 21, and the inclined surface protrusions 24 cooperate with the claw 17; through the design of the clamping mechanism, before the fixed ring 12 is inserted into the receiving groove 14, the rotating ring 21 is rotated, and the rotation of the rotating ring 21 drives the plurality of inclined surface protrusions 24 to rotate synchronously. During the rotation of the inclined surface protrusions 24, the bottom side of the claw 17 is pushed by the inclined surface, and then the claw 17 is pushed to rotate, so that the end of the claw 17 rotates from the receiving groove 14 to the movable groove 15. During the rotation, the claw 17 pushes the sliding seat 20 to move to the inside of the rectangular frame 18. During the movement, the sliding seat 20 squeezes the spring 19. After the fixed ring 12 is inserted into the receiving groove 14, the rotating ring 21 is released. At this time, under the action of the spring 19, the claw 17 is reset and rotated, so that the end of the claw 17 can be clamped in the clamping groove 13 on the fixed ring 12, and the rotating ring 21 is also reset and rotated to the initial position.

[0030] See also Figure 7 A limiting ring 22 is fixed on both sides of the rotating ring 21, and a limiting groove 23 matching with the limiting ring 22 is opened on the inner wall of the movable groove 15; through the design of the limiting ring 22 and the limiting groove 23, the rotation stability of the rotating ring 21 is improved.

[0031] See also Figure 7 The outer surface of the rotating ring 21 is provided with protective patterns; through the design of the anti-slip patterns, maintenance personnel can easily rotate the rotating ring 21 to drive the clamping mechanism.

[0032] Before use, the piston 2 and the shut-off rod 1 are placed between the flow guide part 3 and the blocking part 4. At the same time, the end of the shut-off rod 1 is slidably connected inside the flow hole 8. Then, the flow guide part 3 and the blocking part 4 are clamped and fixed together by a clamping mechanism. After the clamping and assembly are integrated, the assembled device is placed inside the gas pipeline.

[0033] When in use, under normal ventilation conditions, the gas will flow through the sealing portion 4 through the flow hole 2 9 in the middle of the sealing portion 4. At the same time, the gas will enter the gap between the cut-off rod 1 and the flow hole 1 8 through the gap between the piston 2 and the connecting plate 7, and then flow to the outside of the guide portion 3 and enter the water heater, thereby realizing the circulation of the gas; if the water pipe and the gas pipe are misconnected, the tap water will enter the sealing portion 4 through the gap between the connecting plates 7, the water flow will impact the piston 2, and then impact the piston 2 to the flow hole 2 9, the elliptical protrusion of the piston 2 will block the flow hole 2 9, so that the water flow cannot pass through the sealing portion 4, thereby achieving the purpose of preventing tap water from entering the gas pipe;

[0034] The clamping steps of the clamping mechanism are as follows: insert the fixed ring 12 on the connecting member 6 into the receiving groove 14 on the blocking portion 4. Before insertion, rotate the rotating ring 21. The rotation of the rotating ring 21 drives several inclined surface protrusions 24 to rotate synchronously. During the rotation of the inclined surface protrusions 24, the bottom side of the claw 17 will be pushed by the inclined surface, and then the claw 17 will be squeezed and pushed to rotate, so that the end of the claw 17 rotates from the receiving groove 14 to the movable groove 15. During the rotation, the claw 17 will push the sliding seat 20 to move to the inside of the rectangular frame 18. The sliding seat 20 will squeeze the spring 19 during the movement. After the fixed ring 12 is inserted into the receiving groove 14, the rotating ring 21 is released. At this time, under the action of the spring 19, the claw 17 resets and rotates, so that the end of the claw 17 can be clamped in the clamping groove 13 on the fixed ring 12, and the rotating ring 21 also resets and rotates to the initial position.

[0035] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A civil gas pipeline water stop valve, characterized in that: The valve body comprises a valve body, a stop rod (1) and a piston (2), wherein the stop rod (1) and the piston (2) are connected and fixed at the middle part of one side, and the stop rod (1) and the piston (2) are slidably connected in the valve body, and the valve body comprises a flow guide part (3) and a blocking part (4), and the flow guide part (3) and the blocking part (4) are fixed by a clamping mechanism, the stop rod (1) is slidably connected in the flow guide part (3), and the piston (2) is slidably connected in the blocking part (4), and the flow guide part (3) comprises a rotating part (5 ) and a connecting member (6), the rotating member (5) and the connecting member (6) are connected and fixed by a plurality of connecting plates (7), a flow hole (8) is provided in the middle of the rotating member (5), the cut-off rod (1) is slidably connected in the flow hole (8), the clamping mechanism comprises a fixing ring (12) fixed to the bottom of the connecting member (6), a plurality of clamping grooves (13) are evenly provided on the outer surface of the fixing ring (12) in the circumferential direction, a receiving groove (14) is provided on the top of the blocking portion (4), the receiving groove (14) The bottom of the sealing portion (14) is connected to a movable groove (15), the movable groove (15) is provided with an annular opening penetrating to the outer surface of the blocking portion (4), a plurality of fixed shafts (16) are evenly fixed inside the movable groove (15), the fixed shafts (16) correspond to the clamping groove (13), a claw (17) is rotatably connected to the fixed shaft (16), one end of the claw (17) is clamped in the clamping groove (13), and the clamping mechanism further includes a plurality of rectangular frames (18) and a rotatable frame fixed in the movable groove (15). A rotating ring (21) is movably connected to the annular opening, the rectangular frame (18) corresponds to the claw (17), a sliding seat (20) is slidably connected to the opening of the rectangular frame (18), a spring (19) is provided between one end of the sliding seat (20) and the inner wall of the rectangular frame (18), the other end of the sliding seat (20) is pressed together with the claw (17), and a plurality of inclined surface protrusions (24) are evenly provided on the inner wall of the rotating ring (21), and the inclined surface protrusions (24) cooperate with the claw (17).

2. A civil gas pipeline water stop valve according to claim 1, characterized in that: The sealing portion (4) is an annular structure, a second flow hole (9) is provided inside the sealing portion (4), the second flow hole (9) cooperates with the piston (2), an external sealing ring (10) is provided outside the sealing portion (4), and the external sealing ring (10) is squeezed together with the inner wall of the gas pipeline.

3. A civil gas pipeline water stop valve according to claim 2, characterized in that: An internal sealing ring (11) is provided at the junction of the second flow hole (9) and the flow guide portion (3), and the internal sealing ring (11) seals between the connecting piece (6) and the sealing portion (4).

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