A ventilation valve tool that does not require stopping the main valve

Abstract

This utility model relates to a valve replacement tool that does not require shutting off the main valve. It includes an outer connecting pipe, the front end of which is threaded to the end of a valve. A cap is threaded to the rear end of the outer connecting pipe. The cap has a through hole at its top, through which a push tube slidably passes. A pull rod passes through the push tube, with its front end extending beyond the front end of the push tube. A limiting part is provided at the front end of the pull rod, and a rubber sleeve is fitted over the front end of the pull rod. The front and rear ends of the rubber sleeve abut against the limiting part and the front end of the push tube, respectively. The rear end of the push tube extends beyond the rear end of the cap, and the rear end of the pull rod extends beyond the rear end of the push tube. The rear end of the pull rod is threaded, and a push nut is threaded onto it. This utility model enables the replacement of the valve on the outlet branch pipe without shutting off the main valve.

Description

Technical Field

[0001] This utility model relates to the field of valve replacement technology, specifically to a gas exchange valve tool that does not require stopping the main valve. Background Technology

[0002] In a gas supply system, the main valve's outlet is connected to multiple branch outlet pipes, which deliver gas to different areas. Each branch outlet pipe is equipped with a valve to control its opening and closing. Currently, when a valve leaks and needs replacement, the main valve is closed first to prevent gas leakage during the replacement process. However, closing the main valve cuts off gas supply to the remaining branch outlet pipes, affecting gas usage in the affected areas. Therefore, the industry urgently needs a gas exchange valve tool that does not require shutting down the main valve. Utility Model Content

[0003] The purpose of this invention is to provide a gas valve tool that does not require shutting down the main valve, which can replace the gas valve of the outlet branch pipe without closing the main valve.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A valve tool that does not require a main valve stop includes an external connector. The front end of the external connector is threaded to the end of a valve. The rear end of the external connector is threaded to a cap. The top of the cap has a through hole through which a push tube slidably passes. A pull rod passes through the push tube. The front section of the pull rod extends beyond the front end of the push tube. The front end of the pull rod has a limiting part. A rubber sleeve is fitted over the front section of the pull rod. The front and rear ends of the rubber sleeve abut against the limiting part and the front end of the push tube, respectively. The rear section of the push tube extends beyond the rear end of the cap. The rear section of the pull rod extends beyond the rear end of the push tube. The rear section of the pull rod is threaded and threaded to a push nut.

[0005] Specifically, a semi-circular washer is provided inside the cap, and the push tube can be slidably inserted through the semi-circular washer. The front wall of the semi-circular washer is an arc-shaped curved surface, which abuts against the rear end of the outer tube.

[0006] Specifically, the air valve is a manual ball valve, and the front end of the air valve is connected to an air outlet branch pipe.

[0007] Specifically, the limiting part is a screw head, and the front end of the pull rod is fitted with a retaining washer.

[0008] Specifically, a tie rod gap is left between the outer wall of the tie rod and the inner wall of the push tube, and the radial thickness of the tie rod gap is 0.5mm-2mm.

[0009] Specifically, the diameter of the rubber sleeve before deformation is smaller than the inner diameter of the air valve.

[0010] Specifically, a gap is left between the outer wall of the push tube and the inner wall of the outer tube, and the radial thickness of the push tube gap is 1.6mm-3mm.

[0011] Specifically, the length of the push nut is 1.2cm-2.6cm.

[0012] Specifically, several support rubber rings are fixedly installed inside the push tube, and the pull rod can slide through the support rubber rings.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: First, thread the front end of the outer pipe 1 to the rear end of the valve 2 (manual ball valve, ball valve core not shown in the figure) to be replaced. Then, open the valve 2 using the valve handle to open the internal flow channel of the valve 2. Next, push the push tube 3 forward, thereby pushing the rubber sleeve 5 into the outlet branch pipe 21 (e.g., Figure 5 , Figure 6 (As shown). Then, tighten the push nut 6, causing the push nut 6 to push the push tube 3 forward relative to the pull rod 4, so that the front end of the push tube 3 contacts the rear end of the rubber sleeve 5 (as shown). Figure 6 (As shown). As the push nut 6 continues to be turned, the push tube 3 continues to slide forward, causing the front end of the push tube 3 and the limiting part 41 to press inward against both ends of the rubber sleeve 5, causing the rubber sleeve 5 to undergo elastic deformation, thereby shortening the length of the rubber sleeve 5 and increasing its diameter. The increased diameter of the rubber sleeve 5 temporarily blocks the air outlet branch pipe 21, preventing the gas in front from flowing through the air outlet branch pipe 21. Therefore, it is not necessary to close the main valve in front (not shown in the figure), thus allowing the air valve of the air outlet branch pipe to be replaced without closing the main valve. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural view of the air exchange valve tool; Figure 2 This is a view showing the connection status of the air exchange valve tool and the air valve, in which the rubber sleeve is not pushed into the air outlet branch pipe; Figure 3 for Figure 2 A partial view; Figure 4 for Figure 2 A partial view; Figure 5 This is a view showing the connection status of the air valve tool and the air valve, where the rubber sleeve has been pushed into the air outlet branch pipe; Figure 6 for Figure 5A magnified view of a portion of the image.

[0016] In the picture: 1. External pipe; 11. Cap; 12. Semi-circular washer; 2. Air valve; 21. Air outlet branch pipe; 3. Push pipe; 31. Support rubber ring; 4. Pull rod; 41. Limiting part; 42. Abutment washer; 5. Rubber sleeve; 6. Push nut. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] See Figures 1 to 6 A valve replacement tool that does not require shutting off the main valve includes an external connector 1, the front end of which is threaded to the end of the valve 2 to be replaced. A cap 11 is threaded to the rear end of the external connector 1. The top of the cap 11 has a through hole through which a push tube 3 (see...) can be slidably inserted. Figure 4 A pull rod 4 is inserted through the push tube 3, and the front end of the pull rod 4 extends out of the front end of the push tube 3 (see...). Figure 3 The pull rod 4 has a limiting part 41 at its front end, and a rubber sleeve 5 is fitted on the front section of the pull rod 4. The front and rear ends of the rubber sleeve 5 abut against the limiting part 41 and the front end of the push tube 3, respectively. The rear end of the push tube 3 extends out from the rear end of the cap 11, and the rear end of the pull rod 4 extends out from the rear end of the push tube 3. The rear end of the pull rod 4 is a threaded section, and a push nut 6 is threadedly connected to the rear end of the pull rod 4.

[0019] Specifically, see Figure 4 The cap 11 has a semi-circular washer 12 inside, and the push tube 3 is slidably inserted through the semi-circular washer 12. The front wall of the semi-circular washer 12 is an arc-shaped curved surface, which abuts against the rear end of the outer tube 1.

[0020] Specifically, see Figure 3 Air valve 2 is a manual ball valve, and an air outlet branch pipe 21 is connected to the front end of air valve 2.

[0021] Specifically, see Figure 3 The limiting part 41 is a screw head, and the front end of the pull rod 4 is fitted with a retaining washer 42.

[0022] Specifically, a gap is left between the outer wall of the pull rod 4 and the inner wall of the push tube 3, and the radial thickness of the gap is 0.5mm-2mm.

[0023] Specifically, refer to Figure 3 , Figure 6 The diameter of the rubber sleeve 5 before deformation is smaller than the inner diameter of the air valve 2.

[0024] Specifically, a push tube gap is left between the outer wall of the push tube 3 and the inner wall of the outer tube 1, and the radial thickness of the push tube gap is 1.6mm-3mm.

[0025] Specifically, the length of the push nut 6 is 1.2cm-2.6cm.

[0026] Specifically, several support rubber rings 31 are fixedly installed inside the push tube 3, and the pull rod 4 is slidably inserted through the support rubber rings 31.

[0027] The working principle of this utility model is as follows: The main valve (not shown in the figure) has multiple outlet branches 21 connected to its outlet end, and one of the outlet branches 21 is connected to an air valve 2 to be replaced (e.g., ...). Figure 3 To avoid shutting off the gas supply to all outlet branch pipes 21 due to closing the main valve, this invention allows for the replacement of valve 2 without closing the main valve. The specific process is as follows: First, thread the front end of the outer pipe 1 to the rear end of the valve 2 (manual ball valve, ball valve core not shown in the figure) to be replaced. Then, open the valve 2 using the valve handle to open the internal flow channel of the valve 2. Next, push the push tube 3 forward, thereby pushing the rubber sleeve 5 into the outlet branch pipe 21 (e.g., Figure 5 , Figure 6 (As shown). Then, tighten the push nut 6, causing the push nut 6 to push the push tube 3 forward relative to the pull rod 4, so that the front end of the push tube 3 contacts the rear end of the rubber sleeve 5 (as shown). Figure 6 (As shown). As the push nut 6 continues to be turned, the push tube 3 continues to slide forward, causing the front end of the push tube 3 and the limiting part 41 to press inward against both ends of the rubber sleeve 5, causing the rubber sleeve 5 to undergo elastic deformation, thereby shortening the length of the rubber sleeve 5 and increasing its diameter. The increased diameter of the rubber sleeve 5 temporarily blocks the gas outlet branch pipe 21, preventing the gas in front from flowing through the gas outlet branch pipe 21, so there is no need to close the front main valve (not shown in the figure).

[0028] At this point, valve 2 can be replaced. The specific procedure is as follows: First, unscrew the cap 11 and remove the semi-circular washer 12. Next, unscrew the outer connecting pipe 1 from the rear end of the air valve 2. At this time, the rubber sleeve 5 remains plugged in the air outlet branch pipe 21, leaving the pull rod 4 and the push tube 3 outside the opening of the air outlet branch pipe 21. Since the rubber sleeve 5 only contacts the inner wall of the air outlet branch pipe 21, and the outer diameter of the push tube 3 is smaller than the inner diameter of the flow channel inside the air valve 2, the air valve 2 can be unscrewed at this time to replace the air valve.

[0029] After installing the new air valve, turn the push nut 6 in the opposite direction to restore the rubber sleeve 5 to its original diameter. Then, the push tube 3 can be pulled out of the air branch pipe 21, and the newly replaced air valve can be closed to complete the valve replacement.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A ventilation valve tool that does not require stopping the main valve, characterized in that: It includes an outer pipe, the front end of which is threaded to the end of the air valve, and the rear end of the outer pipe is threaded to a cap. The top of the cap has a through hole through which a push tube is slidably inserted. A pull rod is inserted through the push tube. The front end of the pull rod extends out of the front end of the push tube. The front end of the pull rod has a limiting part. A rubber sleeve is fitted on the front end of the pull rod. The front and rear ends of the rubber sleeve abut against the limiting part and the front end of the push tube, respectively. The rear end of the push tube extends out of the rear end of the cap. The rear end of the pull rod extends out of the rear end of the push tube. The rear end of the pull rod is a threaded section, and a push nut is threaded to the rear end of the pull rod.

2. The air exchange valve tool that does not require stopping the main valve according to claim 1, characterized in that: The cap has a semi-circular washer inside, and the push tube can slide through the semi-circular washer. The front wall of the semi-circular washer is an arc-shaped surface, which abuts against the rear end of the outer tube.

3. The air exchange valve tool without the need to stop the main valve according to claim 1, characterized in that: The air valve is a manual ball valve, and an air outlet branch pipe is connected to the front end of the air valve.

4. The air exchange valve tool without the need to stop the main valve according to claim 1, characterized in that: The limiting part is a screw head, and the front end of the pull rod is fitted with a retaining washer.

5. The air exchange valve tool without the need to stop the main valve according to claim 1, characterized in that: A tie rod gap is left between the outer wall of the tie rod and the inner wall of the push tube, and the radial thickness of the tie rod gap is 0.5mm-2mm.

6. The air exchange valve tool that does not require stopping the main valve according to claim 1, characterized in that: The diameter of the rubber sleeve before deformation is smaller than the inner diameter of the air valve.

7. The air exchange valve tool without the need to stop the main valve according to claim 1, characterized in that: A gap is left between the outer wall of the push tube and the inner wall of the outer tube, and the radial thickness of the push tube gap is 1.6mm-3mm.

8. The air exchange valve tool without the need to stop the main valve according to claim 1, characterized in that: The length of the push nut is 1.2cm-2.6cm.

9. The air exchange valve tool without the need to stop the main valve according to claim 1, characterized in that: Several support rubber rings are fixedly installed inside the push tube, and the pull rod can slide through the support rubber rings.

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