Multifunctional stop valve

Abstract

According to the technical scheme, the multifunctional stop valve is characterized by comprising a valve body, a gland, a valve rod and a valve clack, the valve body is provided with a water inlet runner, a water outlet runner, a mounting cavity and a valve port, the valve port communicates the water inlet runner, the water outlet runner and the mounting cavity, the gland is connected with the valve body and seals the mounting cavity, and the valve rod is rotationally connected with the gland; the valve clack is movably connected to the lower end of the valve rod, the lower end of the valve rod is in threaded connection with a pressing pipe, a guide hole for circumferentially limiting the pressing pipe is formed in the pressing cover, and the valve rod drives the pressing pipe to ascend and descend so as to abut against and be away from the valve clack. And a pre-tightening piece is arranged between the valve rod and the valve clack, the valve clack is released from limitation, and when the water pressure of the water outlet flow channel and the water pressure of the water inlet flow channel tend to be balanced, the pre-tightening piece seals the valve port through the valve clack. The stop valve is difficult to disassemble from the outside and can adapt to most unlocking tools, the valve clack can prevent water flow at the valve port from flowing back, and even if the water using device is not completely closed, the water using device does not drip water.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a multifunctional stop valve. Background Art

[0002] A globe valve, also known as a gate valve, is a widely used valve type. Its core function is to precisely open or close the flow path of fluids (liquids, gases, steam), and to regulate flow to a certain extent. In daily life, globe valves are often installed before or after water meters in household pipes, serving as main gates.

[0003] For example, a Chinese patent application numbered CN203868351U discloses a stop valve with a filtering function, comprising a valve body, a valve cover, a valve stem, a valve disc, and a pressure cap. The valve body is provided with a liquid inlet, a liquid outlet, and a valve port. The valve port divides the inner cavity of the valve body into an inlet chamber and an outlet chamber. The liquid inlet communicates with the inlet chamber, and the liquid outlet communicates with the outlet chamber. The valve body is sealed to the valve cover. The valve disc is located in the inner cavity of the valve body and is connected to the lower end of the valve stem. The upper end of the valve stem passes through the valve cover and the pressure cap, which is located on the upper part of the valve cover. The upper end of the valve stem is fixedly connected to a handwheel. When the user turns the handwheel, the valve stem rotates and rises relative to the valve cover, thereby causing the valve disc at the lower end of the valve stem to open and close the valve port, thereby opening and closing the inlet chamber and outlet chamber in the valve body.

[0004] The above technical solution has at least the following drawbacks: When this type of stop valve is connected to a water pipe, the valve stem and disc move upward as a whole, leaving the valve port open, allowing water flowing from the inlet to flow normally to the outlet. However, if water hammer occurs in the pipe or water pressure fluctuates, water flowing from the outlet can easily flow back toward the inlet, hindering accurate water meter readings. Furthermore, if the faucet at the end of the pipe is not closed tightly, it will drip, and this type of stop valve cannot effectively prevent this downstream dripping, which not only wastes water resources but also causes losses to the water company. Furthermore, when this type of stop valve is used as a household valve, the valve stem remains exposed and can be rotated at will by others. It is also easy to disassemble and damage from the outside, causing the valve to fail. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to propose a multifunctional stop valve. The technical problem to be solved by the present invention is: how to prevent dripping from the downstream water user.

[0006] The above technical objectives of the present invention can be achieved through the following technical solutions: A multifunctional stop valve includes a valve body, a pressure cover, a valve stem, and a valve disc. The valve body has an inlet flow channel, an outlet flow channel, an installation cavity, and a valve port. The valve port connects the inlet flow channel, the outlet flow channel, and the installation cavity. The pressure cover is connected to the valve body and seals the installation cavity. The valve stem is rotatably connected to the pressure cover. The valve disc is movably connected to the lower end of the valve stem. The lower end of the valve stem is threadedly connected to a pressure tube. The pressure cover has a guide hole for circumferentially limiting the pressure tube. The valve stem drives the pressure tube to rise and fall so as to press against and away from the valve disc. A pre-tightening member is provided between the valve stem and the valve disc. When the valve disc is released from the limit and the water pressure in the outlet flow channel and the inlet flow channel tends to be balanced, the pre-tightening member seals the valve disc to the valve port.

[0007] In the above-mentioned multifunctional stop valve, a sheath is provided on the outside of the gland, the sheath shields the hexagonal portion on the gland and the upper end of the valve stem, and the upper end of the sheath has an assembly hole.

[0008] In the above-mentioned multifunctional stop valve, the sleeve and the gland are detachably connected, and the connection between the sleeve and the gland is bonded by an adhesive.

[0009] In the above-mentioned multifunctional stop valve, the upper end of the valve stem has a common joint, and the common joint is used for connecting the unlocking tool.

[0010] In the above-mentioned multifunctional stop valve, the outer wall of the sheath is in a smooth columnar shape, and an assembly groove is provided on the outer wall of the sheath. The assembly groove and / or assembly hole can be used for installing an unlocking tool.

[0011] In the above-mentioned multifunctional stop valve, a runner is provided on the valve stem, and the valve stem limits the circumferential position of the runner. A mark is provided on the runner, and an observation port is opened on the outer wall of the sheath near the runner, and the observation port is used to observe the mark.

[0012] In the above-mentioned multifunctional stop valve, the valve stem is provided with a positioning groove, the pre-tightening member comprises a spring, one end of the spring is arranged in the positioning groove, and the other end of the spring is pressed against the valve disc.

[0013] In the above-mentioned multifunctional stop valve, a boss is provided on the valve disc, and the inner ring of the spring close to one end of the valve disc clamps the outer wall of the boss.

[0014] In the above-mentioned multifunctional stop valve, a guide rod is provided on the valve disc, and a guide groove for the guide rod to slide is provided at the lower end of the valve rod.

[0015] In the above-mentioned multifunctional stop valve, a convex ring is provided at the valve port, a sealing gasket is provided at the lower end of the valve disc, and the valve disc is pressed against the convex ring through the sealing gasket, thereby isolating the water inlet flow channel and the water outlet flow channel.

[0016] In summary, the present invention has the following beneficial effects compared to the prior art: This stop valve is installed on the household water pipe. The disc opens the valve port, allowing the downstream water user to discharge water normally. After the water user is closed, the water pressure in the inlet and outlet channels tends to be balanced, and the preloaded component presses the disc against the valve port, not only preventing water from flowing back from the valve port, but also preventing dripping even if the water user is not completely closed. Furthermore, the sheath not only protects the gland and valve stem, but also its smooth outer wall makes it difficult to disassemble from the outside. Furthermore, the shared connector is compatible with most unlocking tools. When the valve stem is no longer needed, the unlocking tool can be removed, further ensuring that the valve stem will not be arbitrarily rotated or damaged. The observation port allows the valve stem's rotational position to be clearly seen from the outside, confirming whether the valve port is open or closed, making it more suitable for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of the embodiment in conjunction with an unlocking tool; Figure 2 is a schematic cross-sectional view of an embodiment; Figure 3 for Figure 1 A cross-sectional schematic diagram; Figure 4 is a cross-sectional schematic diagram of a valve body in an embodiment; Figure 5 Schematic diagram of the exploded structure of the valve cover, valve stem, valve disc, and pressure pipe in the embodiment; Figure 6 for Figure 5 A cross-sectional schematic diagram; Figure 7 This is another structural schematic diagram of the embodiment (the direction of the arrow is the direction of water flow); Figure 8 This is another structural diagram of the embodiment of the second embodiment; Figure 9 This is another structural diagram of the third embodiment.

[0018] Reference numerals: 100, valve body; 110, water inlet channel; 120, water outlet channel; 130, mounting cavity; 140, valve port; 141, convex ring; 200, gland; 210, guide hole; 220, hexagonal portion; 300, valve stem; 310, common joint; 320, runner; 321, tooth groove; 322, mark; 330, toothing; 340, positioning groove; 350, guide groove; 400, valve disc; 410, boss; 420, guide rod; 430, sealing gasket; 500, press tube; 600, preloaded component; 610, spring; 700, sheath; 710, assembly hole; 720, assembly slot; 730, observation port; 800, unlocking tool; 810, handwheel; 811, limit nut; 820, valve magnetic lock; 830, T-type anti-theft mechanical lock. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0020] A multifunctional stop valve, such as Figures 1-9 As shown, it includes a valve body 100, a gland 200, a valve stem 300, and a valve disc 400. The valve body 100 has an inlet channel 110, an outlet channel 120, an installation cavity 130, and a valve port 140. The valve port 140 is connected to the inlet channel 110, the outlet channel 120, and the installation cavity 130. The gland 200 is connected to the valve body 100 and seals the installation cavity 130. The gland 200 and the valve body 100 are sealed by a sealing ring. The valve stem 300 is rotatably connected to the gland 200. The valve disc 400 is movably connected to the lower end of the valve stem 300. The lower end of the valve stem 300 is threadedly connected to a pressure tube 500. The gland 200 has a guide hole 210 for circumferentially limiting the outer wall of the pressure tube 500. The valve stem 300 drives the pressure tube 500 to rise and fall so as to press against and away from the valve disc 400.

[0021] like Figure 2-Figure 6 As shown, specifically, the outer wall of the pressure tube 500 is polygonal, and the cross-sectional shape of the guide hole 210 is adapted to the outer wall shape of the pressure tube 500, so that the guide hole 210 can allow the pressure tube 500 to slide but cannot allow the pressure tube 500 to rotate.

[0022] When the valve stem 300 is rotated to drive the pressure tube 500 to rise and move away from the valve disc 400, the pressure tube 500 releases the limit on the valve disc 400, and the valve disc 400 is in a free state and can move following the water pressure at the valve port 140. Specifically, the water pressure on the side of the outlet channel 120 is less than the water pressure on the side of the inlet channel 110, and the water flow in the inlet channel 110 can drive the valve disc 400 to move upward, and then enter the outlet channel 120 through the valve port 140; the water pressure on one side of the outlet channel 120 is greater than the water pressure on the side of the inlet channel 110, and the water pressure in the outlet channel 120 drives the valve disc 400 to move downward and press the valve port 140, thereby preventing water from flowing back.

[0023] When the valve stem 300 is rotated to drive the pressing tube 500 to move downward and press against the valve flap 400 , the valve flap 400 seals the valve port 140 , and the pressing tube 500 is completely limited above the valve flap 400 .

[0024] Furthermore, a pre-tightening member 600 is provided between the valve stem 300 and the valve disc 400. The pre-tightening member 600 is located in the pressure tube 500. The pre-tightening member 600 is used to apply a pre-tightening force to the valve disc 400. When the pressure tube 500 is away from the valve disc 400, so that the valve port 140 is opened, and the water pressure of the outlet channel 120 and the inlet channel 110 tends to be balanced, the pre-tightening member 600 presses the valve disc 400 against the valve port 140, thereby preventing slight water flow fluctuations from affecting the opening and closing of the valve port 140, and also preventing dripping from occurring downstream.

[0025] The upper end of the gland 200 has a hexagonal portion 220. The gland 200 can be installed or removed from the mounting cavity 130 by rotating the hexagonal portion 220 with a wrench or other tool. A protective sleeve 700 is provided on the outside of the gland 200. The protective sleeve 700 shields the hexagonal portion 220 on the gland 200 and the upper end of the valve stem 300. The upper end of the protective sleeve 700 has an assembly hole 710 for inserting or assembling the unlocking tool 800.

[0026] In this embodiment, the sheath 700 and the gland 200 are manufactured and assembled as two separate components. The sheath 700 is snap-fitted or threaded onto the gland 200, and the connection between the sheath 700 and the gland 200 is bonded with an adhesive. The outer wall of the sheath 700 is smooth and cylindrical, and is provided with an assembly groove 720. The assembly groove 720 and / or the assembly hole 710 are provided for mounting the unlocking tool 800.

[0027] like Figure 3 、 Figure 8 、 Figure 9 As shown, the upper end of the valve stem 300 has a common joint 310, and the common joint 310 is for the unlocking tool 800 to be plugged in. The unlocking tool 800 can be a hand wheel 810, a valve magnetic lock 820 or a T-shaped anti-theft mechanical lock 830. That is, the common joint 310 is applicable to most unlocking tools 800. Figure 7 As shown, in some embodiments, the handwheel 810 is rotatably disposed in the assembly hole 710 through a limiting nut 811, thereby limiting the handwheel 810 to prevent the handwheel 810 from being pulled out, and this type of stop valve can be used as a conventional flow regulating valve.

[0028] like Figure 2-Figure 6As shown, the valve stem 300 is provided with a rotor 320, and the upper end of the valve stem 300 has a tooth 330. The rotor 320 has a tooth groove 321 adapted to the tooth 330. After the rotor 320 is connected to the valve stem 300, the valve stem 300 circumferentially limits the rotor 320, so that the rotor 320 can rotate synchronously with the valve stem 300. The rotor 320 is provided with a mark 322. The outer wall of the sheath 700 is provided with an observation port 730 near the rotor 320. The observation port 730 is used to observe the mark 322. The mark 322 can be a numerical mark, an alphabetic mark, or a scale line. The mark 322 is used to determine the rotational position of the valve stem 300, thereby determining whether the valve flap 400 is in the open or closed state.

[0029] The valve stem 300 has a positioning slot 340 at its lower end. The preload member 600 includes a spring 610, one end of which is disposed within the positioning slot 340, and the other end of which is pressed against the valve flap 400. In some embodiments, the preload member 600 comprises two magnets, one disposed within the positioning slot 340 and the other disposed on the valve flap 400. The magnetic force between the two magnets is a repulsive force, which serves as the preload force.

[0030] Furthermore, a boss 410 is provided on the valve disc 400, and the upper end of the upper end of the spring 610 is located in the positioning groove 340, and the inner ring of the lower end of the spring 610 clamps the outer wall of the boss 410, thereby positioning the upper and lower ends of the spring 610 to ensure stable operation of the spring 610.

[0031] A guide rod 420 is provided at the upper end of the valve flap 400 , and a guide groove 350 for the guide rod 420 to slide is provided at the lower end of the valve stem 300 . When the valve flap 400 moves, it slides along the height direction of the guide groove 350 .

[0032] The valve port 140 has a convex ring 141 protruding toward the installation cavity 130 , and a sealing gasket 430 is provided at the lower end of the valve flap 400 . The valve flap 400 is pressed against the convex ring 141 through the sealing gasket 430 , thereby isolating the water inlet channel 110 and the water outlet channel 120 , thereby increasing the air tightness of the valve port 140 .

[0033] The working principle of the present invention is as follows: like Figure 2As shown, the stop valve is installed on the household water pipe through the water inlet channel 110 and the water outlet channel 120. The unlocking tool 800 is plugged into the common joint 310. The unlocking tool 800 is rotated to drive the valve stem 300 to rotate, thereby driving the pressure pipe 500 to move upward. The pressure pipe 500 releases the limit on the valve disc 400. The stop valve is in the open state, and the pre-tightening member 600 still applies a pre-tightening force to the valve disc 400 pointing to the valve port 140, so that The sealing gasket 430 on the valve disc 400 seals the valve port 140, and the water user at the lower end of the water outlet channel 120 is opened, so that the water pressure in the water outlet channel 120 is lower than the water pressure in the water inlet channel 110. The water pressure in the water inlet channel 110 overcomes the pre-tightening force of the pre-tightening member 600 and pushes the valve disc 400 upward. The water flow in the water inlet channel 110 can enter the water outlet channel 120 through the valve port 140 and the installation cavity 130, realizing normal water discharge from the water user. After the water dispenser is closed, the water pressure in the water inlet channel 110 and the water outlet channel 120 tends to be balanced, and the pre-tightening member 600 pushes the valve flap 400 toward the valve port 140 again, so that the sealing gasket 430 presses against the convex ring 141 to prevent the water flow at the valve port 140 from flowing back.

[0034] If the water dispenser is not completely closed, resulting in dripping from the water dispenser, the water pressure loss in the water outlet channel 120 due to the short-term dripping of the water dispenser is not sufficient to cause an imbalance in the water pressure in the water inlet channel 110 and the water outlet channel 120 and overcome the pre-tightening force of the pre-tightening member 600. The pre-tightening member 600 can still keep the sealing gasket 430 pressed against the valve port 140, thereby avoiding continuous dripping in the downstream channel.

[0035] like Figure 3 As shown, the valve stem 300 is rotated in the opposite direction to drive the pressure tube 500 to move downward, and the pressure tube 500 is pressed downward to press the sealing gasket 430 on the valve disc 400 against the convex ring 141 to achieve sealing of the valve port 140, and the stop valve is in a closed state.

[0036] The sheath 700 not only provides protection for the gland 200 and the valve stem 300, but the smooth outer wall of the sheath 700 also makes it difficult to disassemble the sheath 700 and the gland 200 from the outside; in addition, the common joint 310 can adapt to most unlocking tools 800. When the valve stem 300 is not needed to be operated, the unlocking tool 800 can be removed to further ensure that the valve stem 300 will not be rotated or damaged at will; through the observation port 730, the rotation position of the valve stem 300 can be intuitively seen from the outside, thereby determining whether the valve port 140 is in an open or closed state.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the present invention; those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A multifunctional stop valve, characterized by: The invention comprises a valve body (100), a pressure cover (200), a valve stem (300), and a valve flap (400), wherein the valve body (100) has a water inlet channel (110), a water outlet channel (120), an installation cavity (130), and a valve port (140), wherein the valve port (140) connects the water inlet channel (110), the water outlet channel (120), and the installation cavity (130), the pressure cover (200) is connected to the valve body (100) and seals the installation cavity (130), the valve stem (300) is rotatably connected to the pressure cover (200), the valve flap (400) is movably connected to the lower end of the valve stem (300), and the valve body (100) is connected to the pressure cover (200). The lower end of the valve stem (300) is threadedly connected to a pressure tube (500), and the pressure cover (200) has a guide hole (210) for circumferentially limiting the pressure tube (500). The valve stem (300) drives the pressure tube (500) to rise and fall so as to press against and move away from the valve flap (400); a pre-tightening member (600) is provided between the valve stem (300) and the valve flap (400). When the valve flap (400) is released from the limit and the water pressure of the water outlet channel (120) and the water inlet channel (110) tends to be balanced, the pre-tightening member (600) seals the valve flap (400) against the valve port (140).

2. The multifunctional stop valve according to claim 1, characterized in that: A protective sleeve (700) is provided on the outside of the gland (200), and the protective sleeve (700) covers the hexagonal portion (220) on the gland (200) and the upper end of the valve stem (300), and the upper end of the protective sleeve (700) has an assembly hole (710).

3. The multifunctional stop valve according to claim 2, characterized in that: The protective sleeve (700) is detachably connected to the pressure cover (200), and the connection between the protective sleeve (700) and the pressure cover (200) is bonded by an adhesive.

4. The multifunctional stop valve according to claim 2, characterized in that: The upper end of the valve stem (300) is provided with a common joint (310), and the common joint (310) is connected to an unlocking tool (800).

5. The multifunctional stop valve according to claim 4, characterized in that: The outer wall of the sheath (700) is in a smooth columnar shape. The outer wall of the sheath (700) is provided with an assembly groove (720). The assembly groove (720) and / or the assembly hole (710) can be used for installing the unlocking tool (800).

6. The multifunctional stop valve according to any one of claims 2 to 5, characterized in that: A rotating wheel (320) is provided on the valve stem (300), and the valve stem (300) limits the circumferential position of the rotating wheel (320). A mark (322) is provided on the rotating wheel (320). An observation port (730) is provided on the outer wall of the sheath (700) near the rotating wheel (320), and the observation port (730) is used to observe the mark (322).

7. The multifunctional stop valve according to any one of claims 1 to 5, characterized in that: The valve stem (300) is provided with a positioning groove (340), and the pre-tightening member (600) includes a spring (610), one end of the spring (610) is arranged in the positioning groove (340), and the other end of the spring (610) is pressed against the valve flap (400).

8. The multifunctional stop valve according to claim 7, characterized in that: A boss (410) is provided on the valve flap (400), and the inner ring of the spring (610) close to one end of the valve flap (400) clamps the outer wall of the boss (410).

9. The multifunctional stop valve according to any one of claims 1 to 5, characterized in that: A guide rod (420) is provided on the valve flap (400), and a guide groove (350) for the guide rod (420) to slide is provided at the lower end of the valve rod (300).

10. The multifunctional stop valve according to any one of claims 1 to 5, characterized in that: The valve port (140) is provided with a convex ring (141), and a sealing gasket (430) is provided at the lower end of the valve flap (400). The valve flap (400) is pressed against the convex ring (141) through the sealing gasket (430), thereby isolating the water inlet flow channel (110) and the water outlet flow channel (120).

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