Gas countercurrent one-way valve

Abstract

The utility model relates to the technical field of one-way valves, in particular to a gas backflow one-way valve which comprises a valve rod and a valve seat, the valve seat is located at the bottom of the valve rod, gas inlet channels are formed in the left side and the right side of the outer side wall of the valve rod respectively, a gas conveying channel is formed in the bottom of the valve rod, and a gas inlet channel is formed in the top of the valve seat. An air outlet channel is formed in the bottom of the valve seat, a rotating rod is rotationally connected to the front side of the inner side wall of the valve seat, and a first bevel gear is fixedly connected to the tail end of the rotating rod, so that the first bevel gear drives a second bevel gear and a threaded rod to rotate, a threaded sleeve is stressed to move, and a fixing plate and a clamping rod are driven to move; when gas pushes the sealing block to move, the trapezoidal clamping block can be driven to move, the clamping rod is clamped into the clamping groove to limit the sealing block, the maximum moving position of the sealing block can be adjusted, and therefore the maximum gas outlet speed is adjusted, and the gas control accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of one-way valve technology, and in particular to a gas backflow one-way valve. Background Technology

[0002] A gas check valve is also installed in a gas pipeline. It is a valve that controls the direction of gas flow in one direction, meaning that gas flows in from the inlet and out from the outlet, while gas cannot pass through in the opposite direction. It consists of a valve body, a valve cover, and a diaphragm. One end of the valve body is a connector with a central through hole, and the other end is a threaded hole connected to the valve body. One or more diaphragms are placed inside the valve body cavity. The valve cover has a central through hole, one end of which is a connector, and the other end extends into the valve body cavity and has one or more vent grooves at its end. The diaphragm achieves its one-way function under the action of airflow pressure.

[0003] Chinese patent CN211819725U discloses a gas one-way valve, comprising a valve cap connected to the inner wall of the engine pre-combustion chamber and a valve stem connected to the top of the engine pre-combustion chamber. The valve cap contains a valve seat, and one end of the valve stem is threaded into the inner end of the valve cap. A movable valve ball is provided between the valve seat and the valve stem. The top surface of the valve seat and the bottom surface of the valve stem are both provided with spherical surfaces adapted to the valve ball. The valve stem has an inlet channel, the valve cap has an outlet channel, and the valve seat has a connecting passage connecting the inlet and outlet channels. This gas one-way valve is suitable for use inside the engine pre-combustion chamber, controlling the unidirectional entry of combustion gas into the pre-combustion chamber cavity, effectively preventing gas backflow, and features a long service life and easy installation.

[0004] However, the aforementioned patent has the following drawbacks: if the pressure difference between the inlet and outlet is too large during use, the gas will push the hollow ball to move when it is opened, and when it is closed, the pressure difference inside and outside the valve seat will cause the hollow ball to collide with the valve seat quickly. Furthermore, it lacks a protective device, which makes the hollow ball easily damaged and reduces its service life. In addition, it does not have an adjustment function and cannot adjust the size of the gas outlet, which makes it impossible to limit the maximum gas output speed and reduces the accuracy of gas control. Utility Model Content

[0005] The purpose of this utility model is to provide a gas counterflow check valve that solves the problem of the aforementioned patent, where the pressure difference when closed causes the hollow ball to collide rapidly with the valve seat, making it impossible to limit the maximum gas output speed.

[0006] To achieve the above objectives, this utility model provides a gas counter-current one-way valve, comprising a valve stem and a valve seat. The valve seat is located at the bottom of the valve stem. Air inlet channels are formed on both the left and right sides of the outer wall of the valve stem, and an air delivery channel is formed at the bottom of the valve stem. An air inlet channel is formed at the top of the valve seat, and an air outlet channel is formed at the bottom of the valve seat. A rotating rod is rotatably connected to the front side of the inner wall of the valve seat, and a first bevel gear is fixedly connected to the end of the rotating rod.

[0007] It also includes diversion mechanisms and regulating mechanisms;

[0008] The diversion mechanism includes a diversion pipe, an exhaust port, a mounting block, a telescopic rod, a spring, and a sealing block. The diversion pipe is fixedly connected to the top of the inner cavity of the valve seat. Exhaust ports are opened on both the left and right sides of the outer side wall of the diversion pipe. Mounting blocks are fixedly connected to both the left and right sides of the inner side wall of the diversion pipe. A telescopic rod is fixedly connected to the top of the mounting block. A spring is fixedly connected to the top of the mounting block. A sealing block is fixedly connected to the top of the telescopic rod.

[0009] The adjusting mechanism includes a threaded rod, a second bevel gear, a threaded sleeve, a limiting ring, a mounting rod, a fixing plate, and a locking rod. The threaded rod is rotatably connected to the bottom of the inner cavity of the diverter pipe. The second bevel gear is fixedly connected to the lower side of the outer wall of the threaded rod. The threaded sleeve is screwed onto the outer wall of the threaded rod. The limiting ring is fixedly connected to the top of the threaded rod. Mounting rods are fixedly connected to the top left and right sides of the top of the threaded sleeve. The fixing plate is fixedly connected to the top of the mounting rod. The locking rod is fixedly connected to the top of the fixing plate.

[0010] The valve stem has an annular groove on its outer side wall, arranged sequentially from top to bottom, and an external thread is fixedly connected to the outer side wall wall.

[0011] The top of the inner cavity of the diversion pipe is fixedly connected to an anti-collision pad, which is made of rubber.

[0012] The bottom of the sealing block is fixedly connected to a trapezoidal card block, and the bottom of the trapezoidal card block has a card slot.

[0013] The rotating rod passes through the inner cavity of the valve seat and extends to the outer side of the valve seat, and a knob is fixedly connected to the top of the rotating rod.

[0014] This utility model discloses a gas counter-flow one-way valve. By setting a flow-dividing mechanism, gas enters the diversion pipe through the gas supply channel. The gas pushes the sealing block, causing it to move downwards, thereby removing the block's obstruction of the exhaust port. This allows the gas to be diverted and discharged through both exhaust ports, and then discharged through the outlet channel. This gas diversion prevents excessive pressure from damaging parts and improves service life. A knob can be turned to rotate a rotating rod, which in turn rotates a first bevel gear, which in turn rotates a second bevel gear and a threaded rod. This causes the threaded sleeve to move under force, moving the fixing plate and the locking rod. When the gas pushes the sealing block, it moves the trapezoidal locking block, causing the locking rod to engage in the locking groove and limit the sealing block's movement. The maximum movement position of the sealing block can be adjusted, thereby regulating the maximum gas output speed and improving the accuracy of gas control. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0017] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the present utility model.

[0018] Figure 3 This is a cross-sectional structural schematic diagram of the valve seat according to an embodiment of the present utility model.

[0019] Figure 4 This is a schematic diagram of the adjustment mechanism according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the sealing block according to an embodiment of the present invention.

[0021] In the diagram: 100, valve stem; 110, air inlet passage; 111, air delivery passage; 120, annular groove; 121, external thread; 200, valve seat; 210, air inlet passage; 211, air outlet passage; 212, rotating rod; 213, first bevel gear; 214, knob; 220, diverter pipe; 221, exhaust port; 222, anti-collision pad; 230, mounting block; 231, telescopic rod; 232, spring; 233, sealing block; 234, trapezoidal locking block; 235, locking groove; 240, threaded rod; 241, second bevel gear; 242, threaded sleeve; 243, limit ring; 250, mounting rod; 251, fixing plate; 252, locking rod. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0023] Please see Figures 1-5A gas counter-current check valve includes a valve stem 100 and a valve seat 200. The valve seat 200 is located at the bottom of the valve stem 100. Inlet channels 110 are opened on both the left and right sides of the outer wall of the valve stem 100 for inputting gas. A gas delivery channel 111 is opened at the bottom of the valve stem 100 for delivering gas. An inlet channel 210 is opened at the top of the valve seat 200 for delivering gas. An outlet channel 211 is opened at the bottom of the valve seat 200 for discharging gas. A rotating rod 212 is rotatably connected to the front side of the inner wall of the valve seat 200. The rotating rod 212 drives a first bevel gear 213 to rotate. The end of the rotating rod 212 is fixedly connected to the first bevel gear 213. 3 is used to drive the second bevel gear 241 to rotate, and also includes a flow-dividing mechanism and an adjusting mechanism; the flow-dividing mechanism includes a flow-dividing pipe 220, an exhaust port 221, a mounting block 230, a telescopic rod 231, a spring 232, and a sealing block 233. The flow-dividing pipe 220 is fixedly connected to the top of the inner cavity of the valve seat 200. Exhaust ports 221 are opened on both the left and right sides of the outer side wall of the flow-dividing pipe 220 for discharging gas. Mounting blocks 230 are fixedly connected to both the left and right sides of the inner side wall of the flow-dividing pipe 220 for mounting the telescopic rod 231. The top of the mounting block 230 is fixedly connected to the telescopic rod 231, and the top of the mounting block 230 is fixedly connected to the spring 232 for pushing the sealing block 233 to reset. A sealing block 233 is fixedly connected to the end of the valve stem 100, which is used to block the exhaust port 221. An annular groove 120 is formed on the upper side of the outer wall of the valve stem 100, arranged sequentially from top to bottom. An external thread 121 is fixedly connected to the upper side of the outer wall of the valve stem 100. An anti-collision pad 222, made of rubber, is fixedly connected to the top of the inner cavity of the diversion pipe 220. The anti-collision pad 222 is used to prevent the sealing block 233 from colliding with the diversion pipe 220 during resetting, thus preventing damage to the sealing block 233. A trapezoidal locking block 234 is fixedly connected to the bottom of the sealing block 233. A locking groove 235 is formed at the bottom of the trapezoidal locking block 234, which is used to engage with the locking rod 252, thereby limiting the sealing block 233. The diversion mechanism is used to... Gas enters the diversion pipe 220 through the gas delivery channel 111. The gas pushes the sealing block 233, causing it to move downwards, thereby releasing the obstruction of the exhaust port 221 by the sealing block 233. This allows the gas to be diverted and discharged through the exhaust ports 221 on both sides, and then discharged through the outlet channel 211. The gas diversion reduces the internal and external air pressure of the valve seat 200. After the gas delivery stops, the elasticity of the spring 232 pushes the sealing block 233 to reset and move, causing the telescopic rod 231 to move the sealing gasket 233. This movement of the sealing gasket 233 then blocks the exhaust port 211 and the inlet channel 210, effectively preventing gas backflow. This achieves unidirectional gas delivery, prevents excessive pressure from damaging parts, and improves service life.

[0024] The adjusting mechanism includes a threaded rod 240, a second bevel gear 241, a threaded sleeve 242, a limiting ring 243, a mounting rod 250, a fixing plate 251, and a locking rod 252. The threaded rod 240 is rotatably connected to the bottom of the inner cavity of the diverter pipe 220. The second bevel gear 241 is fixedly connected to the lower side of the outer wall of the threaded rod 240. The second bevel gear 241 is used to rotate, thereby driving the threaded rod 240 to rotate. The threaded sleeve 242 is screwed onto the outer wall of the threaded rod 240. The threaded sleeve 242 is used to move, thereby driving the mounting rod 250. The threaded rod 240 is fixedly connected to a limit ring 243 at its top end. The limit ring 243 is used to prevent the threaded sleeve 242 from moving and disengaging from the threaded rod 240. Mounting rods 250 are fixedly connected to the top left and right sides of the threaded sleeve 242. The mounting rods 250 are used to mount the fixing plate 251. The top end of the mounting rods 250 is fixedly connected to the fixing plate 251. The fixing plate 251 is used to mount the locking rod 252. The top of the fixing plate 251 is fixedly connected to the locking rod 252, which engages with the locking groove 235 to achieve a tight seal. The sealing block 233 is used for limiting and fixing. The rotating rod 212 penetrates the inner cavity of the valve seat 200 and extends to the outer side of the valve seat 200. A knob 214 is fixedly connected to the top of the rotating rod 212. The knob 214 is used to drive the rotating rod 212 to rotate, thereby driving the first bevel gear 213 to rotate, which in turn drives the second bevel gear 241 and the threaded sleeve 240 to rotate. The rotating rod 212 can be driven to rotate by rotating the knob 214, thereby driving the first bevel gear 213 to rotate. The rotation of the first bevel gear 213 causes the second bevel gear 241 and the threaded rod 240 to rotate, causing the threaded sleeve 242 to move under force, which in turn causes the fixed plate 251 and the locking rod 252 to move. When the gas pushes the sealing block 233 to move, it will drive the trapezoidal locking block 234 to move, causing the locking rod 252 to engage in the locking groove 235 to limit the sealing block 233. The maximum movement position of the sealing block 233 can be adjusted, thereby adjusting the exhaust port and thus adjusting the maximum gas output speed, improving the accuracy of gas control.

[0025] In practical use, a diversion mechanism is set up to allow gas to enter the diversion pipe 220 through the gas delivery channel 111. The gas pushes the sealing block 233, causing it to move downwards, thereby releasing the obstruction of the exhaust port 221 by the sealing block 233. This allows the gas to be diverted and discharged through the exhaust ports 221 on both sides, and then discharged through the outlet channel 211. After the gas delivery stops, the elasticity of the spring 232 pushes the sealing block 233 to reset, causing the telescopic rod 231 to move the sealing gasket 233. This movement of the sealing gasket 233 then blocks the exhaust port 211 and the inlet channel 210, effectively preventing gas backflow and achieving unidirectional gas delivery. This prevents excessive pressure from damaging parts. This can be achieved by rotating the knob 2. 14 drives the rotating rod 212 to rotate, which in turn drives the first bevel gear 213 to rotate, which in turn drives the second bevel gear 241 and the threaded rod 240 to rotate, causing the threaded sleeve 242 to move under force, which in turn drives the fixed plate 251 and the locking rod 252 to move. When the gas pushes the sealing block 233 to move, it will drive the trapezoidal locking block 234 to move, causing the locking rod 252 to engage in the locking groove 235 to limit the sealing block 233. The maximum moving position of the sealing block 233 can be adjusted, thereby adjusting the size of the exhaust port 221, so that the gas discharge speed can be precisely controlled, effectively preventing the gas discharge speed from being too high, which would cause the internal and external pressure of the valve seat 200 to be too high, and adjusting the maximum gas discharge speed.

[0026] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A gas counter-current one-way valve, comprising a valve stem and a valve seat, wherein the valve seat is located at the bottom of the valve stem, air inlet channels are formed on both the left and right sides of the outer side wall of the valve stem, an air delivery channel is formed at the bottom of the valve stem, an air inlet channel is formed at the top of the valve seat, an air outlet channel is formed at the bottom of the valve seat, and a rotating rod is rotatably connected to the front side of the inner side wall of the valve seat, wherein a first bevel gear is fixedly connected to the end of the rotating rod, characterized in that, It also includes diversion mechanisms and regulating mechanisms; The diversion mechanism includes a diversion pipe, an exhaust port, a mounting block, a telescopic rod, a spring, and a sealing block. The diversion pipe is fixedly connected to the top of the inner cavity of the valve seat. Exhaust ports are opened on both the left and right sides of the outer side wall of the diversion pipe. Mounting blocks are fixedly connected to both the left and right sides of the inner side wall of the diversion pipe. A telescopic rod is fixedly connected to the top of the mounting block. A spring is fixedly connected to the top of the mounting block. A sealing block is fixedly connected to the top of the telescopic rod.

2. The gas counter-flow check valve as described in claim 1, characterized in that, The adjusting mechanism includes a threaded rod, a second bevel gear, a threaded sleeve, a limiting ring, a mounting rod, a fixing plate, and a locking rod. The threaded rod is rotatably connected to the bottom of the inner cavity of the diverter pipe. The second bevel gear is fixedly connected to the lower side of the outer wall of the threaded rod. The threaded sleeve is screwed onto the outer wall of the threaded rod. The limiting ring is fixedly connected to the top of the threaded rod. Mounting rods are fixedly connected to the top left and right sides of the top of the threaded sleeve. The fixing plate is fixedly connected to the top of the mounting rod. The locking rod is fixedly connected to the top of the fixing plate.

3. A gas counter-current check valve as described in claim 1, characterized in that, The valve stem has an annular groove on its outer side wall, arranged sequentially from top to bottom, and an external thread is fixedly connected to the outer side wall wall of the valve stem.

4. A gas counter-current check valve as described in claim 1, characterized in that, An anti-collision pad is fixedly connected to the top of the inner cavity of the diversion pipe, and the anti-collision pad is made of rubber.

5. A gas counter-current check valve as described in claim 1, characterized in that, A trapezoidal locking block is fixedly connected to the bottom of the sealing block, and a locking groove is opened at the bottom of the trapezoidal locking block.

6. A gas counter-current check valve as described in claim 1, characterized in that, The rotating rod passes through the inner cavity of the valve seat and extends to the outer side of the valve seat. A knob is fixedly connected to the top of the rotating rod.

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