Leakage detection type stop valve

Abstract

The utility model discloses a leak detection type stop valve, which belongs to the technical field of valves and comprises a valve body, a valve cover is detachably mounted at the top of the valve body, a valve rod is rotatably mounted in the valve cover, and a valve core is fixedly mounted at the bottom end of the valve rod; a vertically-separated separation section is arranged in the valve body, and a valve port is formed in the separation section in a penetrating mode. A leakage detection valve sleeve is assembled at the bottom of the valve body in a sealed mode through threads, a leakage detection valve pipe is sleeved with the leakage detection valve sleeve, a sealing cover is fixed to the top of the leakage detection valve pipe, a plurality of flowing grooves are formed in the side wall of the top end of the leakage detection valve pipe, and a leakage detection opening is formed in the bottom end of the leakage detection valve pipe. A sliding seat is fixed on the side wall of the bottom section of the leak detection valve tube, the sliding seat is slidably mounted on a guide shaft fixed in the leak detection valve sleeve, and a spring for pushing the sliding seat to move downwards is mounted on the guide shaft in a sleeving manner. According to the leak detection type stop valve, the leak detection valve sleeve, the leak detection valve pipe and other assemblies are arranged, the sealing performance of the valve element in the closed state can be overhauled, the whole valve does not need to be disassembled, and the leak detection type stop valve is more convenient to overhaul.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a leak detection stop valve. Background Art

[0002] A globe valve is a closed-circuit valve that completely opens or closes a pipeline. It primarily consists of a valve body, disc, stem, and sealing seat. The valve body is typically cast or forged, with internal channels for fluid flow. The disc is a disc that moves up and down along the stem, working closely with the sealing seat to close and open the valve. The stem, connected to the disc and extending outside the body, operates the disc's movement.

[0003] In the existing stop valve, after long-term use, the valve core in the valve body will be worn, and the valve core will not be sealed tightly after being worn. At this time, even if the valve stem is completely closed, the valve core cannot block the water flow. Therefore, the staff needs to regularly inspect the valve. In the face of the above situation, the current stop valve can only be disassembled for inspection, which makes it very inconvenient to inspect and repair. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a leak detection stop valve, which can inspect the sealing of the valve core in the closed state by arranging components such as a leak detection valve sleeve and a leak detection valve tube, without the need to disassemble the entire valve, and is more convenient during maintenance.

[0005] In order to solve the above technical problems, the technical solution of the utility model is achieved as follows:

[0006] When unclamping said control button, under the effect of the compression spring and the bubble holding vessel internal pressure that shaves, combine closely in the interior of the valve body and sealing load chamber, and closure is mounted on the valve core, and casing is provided with a bottom end cap, and support and conveyer frames movable end contact surface.

[0007] By adopting the above solution, the leak detection stop valve can inspect the sealing of the valve core in the closed state by providing components such as the leak detection valve sleeve and the leak detection valve tube, without disassembling the entire valve, which is more convenient during inspection.

[0008] As a preferred embodiment of the leak detection stop valve, in order to ensure that the leak detection valve sleeve can block the liquid in the lower discharge chamber, the diameter of the leak detection valve sleeve is designed to be larger than the diameter of the valve port.

[0009] As a preferred embodiment of a leak detection stop valve, in order to ensure the rapid circulation of liquid in the valve body, a flow groove is opened vertically along the length direction of the leak detection valve tube.

[0010] As a preferred embodiment of the leak detection stop valve, a turntable is fixed on the outer wall of the bottom end of the leak detection valve sleeve in order to facilitate the rotation of the leak detection valve sleeve.

[0011] As a preferred embodiment of the leak detection stop valve, in order to further improve the sealing effect of the sealing cover, a sealing ring is fixed at the bottom of the sealing cover.

[0012] As a preferred embodiment of a leak detection stop valve, in order to facilitate pressing the leak detection valve tube upward, a pressing seat is fixed at the bottom end of the leak detection valve tube; wherein the diameter of the pressing seat is larger than the diameter of the leak detection valve tube.

[0013] As a preferred embodiment of a leak-detection stop valve, in order to facilitate the disassembly and replacement of the valve core, the valve core and the valve stem are interference-fitted, and the valve core and the valve stem are connected at the same time through a horizontal limit pin. When the valve core is worn in the later stage, it can be directly disassembled and replaced.

[0014] After adopting the above technical solution, the beneficial effects of the utility model are:

[0015] 1. The leak detection stop valve is equipped with components such as a leak detection valve sleeve and a leak detection valve tube, which can inspect the sealing of the valve core in the closed state without disassembling the entire valve, making it more convenient for maintenance;

[0016] 2. The diameter of the leak detection valve sleeve is designed to be larger than the diameter of the valve port to ensure that the leak detection valve sleeve can block the liquid in the lower discharge cavity;

[0017] 3. Opening the flow groove vertically along the length of the leak detection valve tube can ensure the rapid flow of liquid in the valve body;

[0018] 4. A sealing ring is fixed at the bottom of the sealing cover to further improve the sealing effect of the sealing cover;

[0019] 5. A pressing seat is fixed at the bottom end of the leak detection valve tube, wherein the diameter of the pressing seat is larger than the diameter of the leak detection valve tube, which can easily press the leak detection valve tube upward;

[0020] 6. Fit the valve core and valve stem together with interference fit, and connect the valve core and valve stem at the same time through a horizontal limit pin. When the valve core is worn in the later stage, it can be directly disassembled and replaced, thus facilitating the disassembly and replacement of the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 The three-dimensional structure of the utility model during normal use Figure 1 ;

[0023] Figure 2 The three-dimensional structure of the utility model during normal use Figure 2 ;

[0024] Figure 3 For display Figure 1 A three-dimensional structural diagram of the interior;

[0025] Figure 4 for Figure 3 Partial three-dimensional structural diagram of the middle valve core;

[0026] Figure 5 The three-dimensional structure of the utility model during leak detection Figure 1 ;

[0027] Figure 6 The three-dimensional structure of the utility model during leak detection Figure 2 ;

[0028] Figure 7 For display Figure 5 A three-dimensional structural diagram of the interior;

[0029] Figure 8 for Figure 7 Partial three-dimensional structural diagram of the location of the middle leak detection valve sleeve;

[0030] Figure 9 for Figure 7 Three-dimensional structure of the leak detection valve sleeve assembly Figure 1 ;

[0031] Figure 10 for Figure 7 Three-dimensional structure of the leak detection valve sleeve assembly Figure 2 ;

[0032] Figure 11 For display Figure 9 A three-dimensional structural diagram of the interior;

[0033] Markings in the figure: 1-valve body; 2-valve cover; 3-valve stem; 4-valve core; 5-partition section; 6-upper injection chamber; 7-lower discharge chamber; 8-valve port; 9-leak detection valve sleeve; 10-leak detection valve tube; 11-sealing cover; 12-flow groove; 13-leak detection port; 14-slide seat; 15-guide shaft; 16-spring; 17-turntable; 18-sealing ring; 19-pressing seat; 20-limit pin. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] like Figures 1 to 11 As shown, a leak detection stop valve comprises a valve body 1, a valve cover 2 is detachably mounted on the top of the valve body 1, a valve stem 3 is rotatably mounted in the valve cover 2, and a valve core 4 is fixedly mounted on the bottom end of the valve stem 3; a partition section 5 is provided inside the valve body 1, which divides the interior of the valve body 1 into an upper injection chamber 6 and a lower discharge chamber 7; a valve port 8 is formed through the partition section 5, and the valve core 4 can completely block the valve port 8 under the drive of the valve stem 3; the bottom of the valve body 1 is equipped with a threaded seal located at the valve port 8 The leak detection valve sleeve 9 at the bottom has a leak detection valve tube 10 installed inside it; a sealing cover 11 is fixed to the top of the leak detection valve tube 10, and a plurality of flow grooves 12 distributed in a circumferential array are provided on the top side wall of the leak detection valve tube 10. A leak detection port 13 is provided at the bottom end of the leak detection valve tube 10; a slide 14 is fixed to the side wall of the bottom section of the leak detection valve tube 10, and the slide 14 is slidably mounted on a guide shaft 15 fixed in the leak detection valve sleeve 9. The guide shaft 15 is sleeved with a spring 16 that pushes the slide 14 downward. By providing components such as the leak detection valve sleeve 9 and the leak detection valve tube 10, the leak detection stop valve can inspect the sealing of the valve core 4 in the closed state without disassembling the entire valve, which is more convenient during inspection.

[0036] like Figure 7 As shown, in order to ensure that the leak detection valve sleeve 9 can block the liquid in the lower discharge chamber 7 , the diameter of the leak detection valve sleeve 9 is designed to be larger than the diameter of the valve port 8 .

[0037] like Figure 11 As shown, in order to ensure the rapid circulation of liquid in the valve body 1, the flow groove 12 is opened vertically along the length direction of the leak detection valve tube 10.

[0038] like Figures 9 to 11 As shown, in order to facilitate the rotation of the leak detection valve sleeve 9, a turntable 17 is fixed on the outer wall of the bottom end of the leak detection valve sleeve 9.

[0039] like Figure 11 As shown, in order to further improve the sealing effect of the sealing cover 11 , a sealing ring 18 is fixed at the bottom of the sealing cover 11 .

[0040] like Figure 11 As shown, in order to facilitate pressing the leak detection valve tube 10 upward, a pressing seat 19 is fixed at the bottom end of the leak detection valve tube 10 ; wherein, the diameter of the pressing seat 19 is larger than the diameter of the leak detection valve tube 10 .

[0041] like Figure 4 As shown, in order to facilitate the disassembly and replacement of the valve core 4, the valve core 4 and the valve stem 3 are interference fitted, and the valve core 4 and the valve stem 3 are connected at the same time through a horizontal limit pin 20. When the valve core 4 is worn in the later stage, it can be directly disassembled and replaced.

[0042] The working principle of this utility model:

[0043] During normal use, the fluid in the pipeline flows unidirectionally along the upper injection chamber 6, the valve port 8, and the lower discharge chamber 7. The position of the valve core 4 can be adjusted by rotating the valve stem 3, thereby adjusting the flow rate.

[0044] With the long-term use of the valve core 4, the valve core 4 will be worn. After the valve core 4 is worn, the valve port 8 will be loosely sealed. In order to facilitate leak detection, the valve core 4 is completely blocked by the valve port 8, and then the turntable 17 is rotated to drive the leak detection valve sleeve 9 to move upward until the leak detection valve sleeve 9 docks with the valve port 8.

[0045] If the valve port 8 is not sealed tightly, the fluid will slowly flow into the leak detection valve sleeve 9. By pushing the pressing seat 19 upward, the spring 16 will be compressed, and all the flow grooves 12 will move upward. At this time, the fluid will enter the leak detection valve tube 10 from the flow groove 12 and then flow out from the leak detection port 13.

[0046] Therefore, when fluid flows out of the leak detection port 13, it indicates that the leak detection stop valve is not sealed tightly and should be disassembled and replaced in time; otherwise, it indicates that the leak detection stop valve is sealed intact and can be used normally.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A leak detection stop valve, comprising a valve body (1), a valve cover (2) being detachably mounted on the top of the valve body (1), a valve stem (3) being rotatably mounted in the valve cover (2), and a valve core (4) being fixedly mounted on the bottom end of the valve stem (3); a partition section (5) being provided in the interior of the valve body (1), the partition section dividing the interior of the valve body (1) into an upper injection chamber (6) and a lower discharge chamber (7); a valve port (8) being formed through the partition section (5), and the valve core (4) being capable of completely blocking the valve port (8) under the drive of the valve stem (3); Its characteristics are: The bottom of the valve body (1) is equipped with a leak detection valve sleeve (9) located directly below the valve port (8) through a threaded seal, and a leak detection valve tube (10) is installed in the leak detection valve sleeve (9); a sealing cover (11) is fixed on the top of the leak detection valve tube (10), and a plurality of flow grooves (12) distributed in a circumferential array are provided on the top side wall of the leak detection valve tube (10), and a leak detection port (13) is provided at the bottom end of the leak detection valve tube (10); a slide (14) is fixed on the side wall of the bottom section of the leak detection valve tube (10), and the slide (14) is slidably installed on a guide shaft (15) fixed in the leak detection valve sleeve (9), and the guide shaft (15) is installed with a spring (16) for pushing the slide (14) to move downward.

2. The leak detection stop valve according to claim 1, characterized in that: The diameter of the leak detection valve sleeve (9) is larger than the diameter of the valve port (8).

3. The leak detection stop valve according to claim 1, characterized in that: The flow groove (12) is vertically opened along the length direction of the leak detection valve tube (10).

4. The leak detection stop valve according to claim 1, characterized in that: A rotating disk (17) is fixed on the outer wall of the bottom end of the leak detection valve sleeve (9).

5. The leak detection stop valve according to claim 1, characterized in that: A sealing ring (18) is fixed to the bottom of the sealing cover (11).

6. The leak detection stop valve according to claim 1, characterized in that: A pressing seat (19) is fixed to the bottom end of the leak detection valve tube (10).

7. The leak detection stop valve according to claim 6, characterized in that: The diameter of the pressing seat (19) is larger than the diameter of the leak detection valve tube (10).

8. The leak detection stop valve according to any one of claims 1 to 7, characterized in that: The valve core (4) and the valve stem (3) are interference-fitted, and the valve core (4) and the valve stem (3) are simultaneously connected via a transverse limiting pin (20).

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