Inclined seat type metal hard sealing butterfly slow-closing check valve

Abstract

The invention provides an inclined seat type metal hard sealing butterfly slow-closing check valve, and relates to the technical field of valves, the inclined seat type metal hard sealing butterfly slow-closing check valve comprises a valve body, a butterfly plate is arranged in the valve body, the two sides of the butterfly plate are fixedly connected with a first valve shaft and a second valve shaft through a plurality of pin shafts, the first valve shaft is connected with an oil cylinder mechanism through a shaft sleeve assembly, and the second valve shaft is connected with an oil cylinder. The second valve shaft is connected with the heavy hammer assembly through the shaft sleeve assembly. The counter weight assembly and the oil cylinder mechanism are arranged in the valve body, and through cooperation of the counter weight assembly and the oil cylinder mechanism, the problems that in the background technology, an opening of an existing butterfly check valve is limited in a channel, the area of a medium drainage basin is reduced, internal damage is caused, foreign matter such as aquatic plants is prone to being wound, and the service life of the butterfly check valve is prolonged are effectively solved. Under different working conditions, vortex and disorder of a medium can enable the valve plate to shake, so that the risk that parts are loosened and fall off is caused.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, in particular to an inclined seat type metal hard seal butterfly type slow closing check valve. Background Art

[0002] A butterfly check valve is a valve that automatically opens and closes the valve plate by relying on the flow of the medium itself to prevent the backflow of the medium. It is also called a non-return valve, a one-way valve, a reverse flow valve, and a back pressure valve. The check valve is an automatic valve whose main function is to prevent the backflow of the medium, prevent the pump and the drive motor from reversing, and the release of the container medium.

[0003] The opening limit of the existing butterfly check valve is in the channel, which reduces the medium flow area, causes internal loss and is easy to entangle foreign objects such as water plants. Under different working conditions, the eddy current and turbulence of the medium will cause the valve plate to shake, thereby causing the risk of loosening and falling off of parts. Therefore, in view of the above situation, it is urgent to develop an inclined seat metal hard seal butterfly slow closing check valve to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The present invention provides an inclined seat type metal hard seal butterfly slow closing check valve, which is used to solve the technical problems raised by the above background technology: the traditional equipment needs to be manually adjusted and positioned, the working efficiency is low and there is a positioning deviation.

[0005] In order to solve the above technical problems, the present invention discloses an inclined seat type metal hard seal butterfly slow closing check valve, comprising: a valve body, a butterfly plate is arranged in the valve body, the two sides of the butterfly plate are fixedly connected to valve shaft one and valve shaft two through a plurality of pins, and the valve shaft one is connected to the cylinder mechanism through a shaft sleeve assembly, and the valve shaft two is connected to the weight hammer assembly through the shaft sleeve assembly.

[0006] Preferably, the weight assembly includes: a weight connecting rod, one end of the weight connecting rod is fixedly connected to the valve shaft 2, and the other end of the weight connecting rod is fixedly connected to the weight, and the weight connecting rod is coaxially fixedly connected with a clamping plate and a split clamping ring from left to right on the side close to the butterfly plate.

[0007] Preferably, the oil cylinder mechanism consists of an oil cup assembly and a cylinder head assembly, and the oil cup assembly is fixedly mounted on one end of the cylinder head assembly, and the bottom end of the oil cup assembly is connected to the cylinder head assembly.

[0008] Preferably, the right end of the sleeve assembly at the right end of the valve body is bolted to a seat plate, the valve shaft 1 passes through the valve body and is connected to the force arm, and a spacer sleeve is provided between the valve shaft 1 and the force arm, the force arm is connected to the output end of the cylinder head assembly through the connecting shaft 1, and the fixed end of the cylinder head assembly is movably connected to one end of the connecting shaft 2, and the other end of the connecting shaft 2 is connected to the seat plate.

[0009] Preferably, the cylinder head assembly comprises: a cylinder body, a base being threadedly connected to the bottom end of the cylinder body, and a piston being slidably connected in the cylinder body, a piston rod being fixedly installed in the piston, and the piston rod passing through the cylinder body and connected to a connecting shaft, and the bottom end of the piston rod being connected to one end of a throttle rod, and the other end of the throttle rod being fixedly connected to a cap, and the cap being fixedly connected to the base, and a one-way valve being arranged in the piston.

[0010] Preferably, the valve body further comprises: Flow rate sensor, used to detect the flow rate of water in the valve body; The first water pressure sensor is used to detect the pressure of the water flow inlet on one side of the valve body; A second water pressure sensor is used to detect the pressure of the water outlet on the other side of the valve body; A controller and an alarm, wherein the controller is electrically connected to the flow rate sensor, the first water pressure sensor, the second water pressure sensor and the alarm.

[0011] Preferably, the controller controls the alarm to work based on the flow rate sensor, the first water pressure sensor, and the second water pressure sensor, including the following steps: Step 1: Calculate the flow resistance coefficient of the valve body according to formula (1), the flow rate sensor, the first water pressure sensor, and the second water pressure sensor detection values.

[0012] (1); in is the water flow friction coefficient, is the flow rate sensor detection value, is the water flow density, is the acceleration due to gravity, is the inner diameter of the valve pipe, is the detection value of the first water pressure sensor, is the detection value of the second water pressure sensor, is the width of the valve, is the working time of the valve; Step 2: Calculate the actual gap flow formed by the butterfly plate and the inner boundary of the valve body according to the following formula (2). , the controller compares the actual gap flow formed by the butterfly plate and the boundary of the valve body Compared with the preset gap flow range, when the actual gap flow is higher than the preset gap flow range, the controller controls the alarm to sound: (2); in is the dynamic viscosity of water flow, is the thickness of the butterfly plate, is the outer diameter of the butterfly plate, The value is 3.14. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present invention or 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 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 work.

[0014] Figure 1 A schematic diagram of a valve body structure provided in an embodiment of the present invention; Figure 2 The embodiment of the present invention provides Figure 1 Right view of the middle valve body structure; Figure 3 The embodiment of the present invention provides Figure 1 The left side section view of the middle valve body structure; Figure 4 The embodiment of the present invention provides Figure 1 Schematic diagram of the internal structure of the middle oil cylinder mechanism.

[0015] Reference numerals: 1. Valve body; 2. Weight; 3. Cylinder head assembly; 4. Weight connecting rod; 5. Clamp pressure plate; 6. Split clamp; 7. Bushing assembly; 8. Valve shaft 2; 9. Valve shaft 1; 10. Pin; 11. Seat plate; 12. Lever; 13. Connecting shaft 1; 14. Spacer; 15. Connecting shaft 2; 16. Butterfly plate; 17. Oil cup assembly; 18. Cover cap; 19. Throttle rod; 20. Piston rod; 21. Cylinder body; 22. Piston; 23. Base; 24. Check valve. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0017] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0018] The present invention provides the following embodiments Example 1 The embodiment of the present invention provides a tilt seat type metal hard seal butterfly type slow closing check valve, such as Figure 1-4 As shown, it includes: a valve body 1, a butterfly plate 16 is arranged in the valve body 1, and the two sides of the butterfly plate 16 are fixedly connected to the valve shaft 1 9 and the valve shaft 2 8 through a plurality of pin shafts 10, and the valve shaft 1 9 is connected to the cylinder mechanism through the shaft sleeve assembly 7, and the valve shaft 2 8 is connected to the heavy hammer assembly through the shaft sleeve assembly 7.

[0019] The beneficial effects of the above technical solution are as follows: the present invention arranges a weight assembly and a cylinder mechanism in the valve body 1, and through the cooperation of the weight assembly and the cylinder mechanism, the technical problem proposed in the background technology is effectively improved: the opening limit of the existing butterfly check valve is in the channel, which reduces the medium flow area, causes internal loss and is easy to entangle foreign objects such as aquatic plants. Under different working conditions, the eddy current and turbulence of the medium will cause the valve plate to shake, thereby causing the risk of loosening and falling off of parts.

[0020] Example 2 On the basis of Example 1, Figure 1-4 As shown, the oblique seat type metal hard seal butterfly slow closing check valve, the weight assembly includes: a weight connecting rod 4, one end of the weight connecting rod 4 is fixedly connected to the valve shaft 8, and the other end of the weight connecting rod 4 is fixedly connected to the weight 2, and the weight connecting rod 4 is coaxially fixedly connected with a clamping plate 5 and a split clamping ring 6 from left to right on the side close to the butterfly plate 16.

[0021] Optionally, the oil cylinder mechanism is composed of an oil cup assembly 17 and a cylinder head assembly 3, and the oil cup assembly 17 is fixedly mounted on one end of the cylinder head assembly 3, and the bottom end of the oil cup assembly 17 is connected to the cylinder head assembly 3.

[0022] Optionally, the right end of the shaft sleeve assembly 7 at the right end of the valve body 1 is bolted to a seat plate 11, the valve shaft 19 passes through the valve body 1 and is connected to a force arm 12, and a spacer sleeve 14 is provided between the valve shaft 19 and the force arm 12, the force arm 12 is connected to the output end of the cylinder head assembly 3 through a connecting shaft 13, and the fixed end of the cylinder head assembly 3 is movably connected to one end of a connecting shaft 15, and the other end of the connecting shaft 15 is connected to the seat plate 11.

[0023] Optionally, the cylinder head assembly 3 includes: a cylinder body 21, a base 23 is threadedly connected to the bottom end of the cylinder body 21, and a piston 22 is slidably connected in the cylinder body 21 (a piston sealing ring is provided on the piston 22), a piston rod 20 is fixedly installed in the piston 22, and the piston rod 20 passes through the cylinder body 21 and is connected to the connecting shaft 13, and the bottom end of the piston rod 20 is connected to one end of the throttle rod 19, and the other end of the throttle rod 19 is fixedly connected to the cap 18, and the cap 18 is fixedly connected to the base 23, and a one-way valve 24 is provided in the piston 22.

[0024] The working principle of the above technical solution is: this series of products are unpowered equipment that automatically opens and closes according to the running status of the water pump and does not require operation; When the water pump starts, the butterfly plate 16 automatically opens slowly, the weight 2 is lifted, and the piston rod 20 is pulled out; When the water pump is running, the butterfly plate 16 is stable and works smoothly at a large opening; When the pump stops normally or unexpectedly, the valve automatically closes in two stages: fast and slow. Fast closing stage: When the pump is stopped, the butterfly plate 16 quickly closes the valve by 80-85% (adjustable) angular stroke under the action of the gravity moment, the weight 2 moment and the backflow water, thus cutting off a large amount of backflow water; Slow closing stage: When the fast closing stage ends, the pre-set throttling element in the slow closing cylinder throttles the hydraulic oil circulating in the cylinder to generate damping and start slow closing; the throttling element is a variable throttling structure, and its throttling area changes with the 16-degree angle stroke displacement of the butterfly plate during the valve closing process. The slow closing performance is good and it is very convenient and practical.

[0025] The beneficial effects of the above technical scheme are as follows: by setting the valve shaft 1 9 and the valve shaft 2 8 of the valve to adopt a semi-axis structure, the flow area is large and the flow resistance coefficient is small; all the inner cavities of the valve body 1 are smooth flow-guiding transition structures, with small flow resistance, less head loss, and high efficiency and energy saving; at the same time, the valve can be applied to sewage media, and impurities are not easy to entangle and accumulate when passing through the valve; the butterfly plate 16 of the present invention is inclined, and the valve closing angle stroke is short. The valve is basically closed before a large amount of backflow water flows back, avoiding the occurrence of destructive water hammer; the sleeve assembly 7 is an all-metal hard seal design, which is resistant to scouring and wear, durable, and has good sealing performance after closing the valve, which can effectively prevent water backflow; the butterfly plate 16 is designed as a large eccentric double offset structure, and the butterfly plate 16 is more sensitive, faster and more reasonable to open and close; the throttling rod 19 is adjustable and replaceable, and can be adjusted according to different working conditions; the piston piston sealing ring adopts a plurality of groups of "open metal sealing rings", and the opening circumference is staggered and evenly distributed during installation to form a "mechanical labyrinth seal" for the hydraulic oil in the upper and lower chambers of the cylinder body 21 Durable and wear-resistant, with strong slow-closing damping protection and no possibility of damage; the oil cylinder mechanism is external and independent, no oil leakage is possible, and the oil cylinder mechanism is completely separated from the medium, and will not cause secondary pollution to the medium; the cylinder body 21 is basically set vertically, with only one external seal at the bottom, and it is a static seal structure, no oil leakage is possible; The oil circuit of the oil cylinder is an internal circulation oil circuit without any external pipelines and the possibility of oil leakage. When the valve is operating normally, there is no pressure in the oil cylinder cavity, and there is pressure in the lower cavity of the oil cylinder only when the valve butterfly plate 16 is slowly closed, and the performance is reliable.

[0026] Example 3 On the basis of Embodiment 1-2, a tilted seat metal hard seal butterfly slow closing check valve, the valve body 1 also includes: A flow rate sensor, used to detect the flow rate of water in the valve body 1; The first water pressure sensor is used to detect the pressure of the water flow inlet on one side of the valve body 1; The second water pressure sensor is used to detect the pressure of the water outlet on the other side of the valve body 1; A controller and an alarm, wherein the controller is electrically connected to the flow rate sensor, the first water pressure sensor, the second water pressure sensor and the alarm.

[0027] Optionally, the controller controls the alarm to work based on the flow rate sensor, the first water pressure sensor, and the second water pressure sensor, including the following steps: Step 1: Calculate the flow resistance coefficient of valve body 1 according to formula (1), the flow rate sensor, the first water pressure sensor, and the second water pressure sensor detection values.

[0028] (1); in is the water flow friction coefficient (the range is 0.36-0.75), is the flow rate sensor detection value, is the water flow density, is the acceleration due to gravity, is the inner diameter of the valve pipe, is the detection value of the first water pressure sensor, is the detection value of the second water pressure sensor, is the width of the valve, is the working time of the valve; Step 2: Calculate the actual gap flow formed between the butterfly plate 16 and the inner boundary of the valve body 1 according to the following formula (2): , the controller compares the actual gap flow formed by the butterfly plate 16 and the inner boundary of the valve body 1 Compared with the preset gap flow range, when the actual gap flow is higher than the preset gap flow range, the controller controls the alarm to sound: (2); in is the dynamic viscosity of water flow, is the thickness of the butterfly plate 16, is the outer diameter of the butterfly plate 16, The value is 3.14.

[0029] The beneficial effect of the above technical solution is that the controller calculates the flow resistance coefficient of the valve body 1 based on the formula (1), the flow rate sensor, the first water pressure sensor, and the detection values ​​of the second water pressure sensor, and comprehensively considers the water flow friction resistance coefficient, water flow density, gravity acceleration, valve pipe inner diameter, valve width, and valve working time, so that the calculation result is more accurate and reliable; Then, according to the formula (2), the water flow dynamic viscosity, the thickness of the butterfly plate 16, and the outer diameter of the butterfly plate 16, the actual gap flow formed by the butterfly plate 16 and the inner boundary of the valve body 1 is calculated, so that the calculation result is more accurate and reliable; The controller compares the actual gap flow formed by the butterfly plate 16 and the inner boundary of the valve body 1 with the preset gap flow range. When the actual gap flow is higher than the preset gap flow range, the controller controls the alarm to sound an alarm, thereby reminding the staff to promptly inspect and repair the inclined seat type metal hard seal butterfly slow closing check valve or replace the butterfly plate 16, thereby meeting the user's demand for this inclined seat type metal hard seal butterfly slow closing check valve.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An inclined seat metal hard seal butterfly slow closing check valve, characterized in that ,include: A valve body (1), wherein a butterfly plate (16) is arranged in the valve body (1), and the two sides of the butterfly plate (16) are fixedly connected to a valve shaft 1 (9) and a valve shaft 2 (8) via a plurality of pins (10), and the valve shaft 1 (9) is connected to an oil cylinder mechanism via a shaft sleeve assembly (7), and the valve shaft 2 (8) is connected to a weight assembly via the shaft sleeve assembly (7).

2. According to claim 1, a metal hard seal butterfly slow closing check valve with inclined seat, characterized in that The weight assembly comprises a weight connecting rod (4), one end of the weight connecting rod (4) being fixedly connected to valve shaft 2 (8), and the other end of the weight connecting rod (4) being fixedly connected to the weight (2), and a clamping plate (5) and a split clamping ring (6) being coaxially fixedly connected from left to right on a side of the weight connecting rod (4) close to the butterfly plate (16).

3. According to claim 1, a metal hard seal butterfly slow closing check valve with inclined seat, characterized in that The oil cylinder mechanism is composed of an oil cup assembly (17) and a cylinder head assembly (3), and the oil cup assembly (17) is fixedly mounted on one end of the cylinder head assembly (3), and the bottom end of the oil cup assembly (17) is connected to the cylinder head assembly (3).

4. According to claim 1, a metal hard seal butterfly slow closing check valve with inclined seat, characterized in that The right end of the shaft sleeve assembly (7) at the right end of the valve body (1) is bolted to a seat plate (11); the valve shaft 1 (9) passes through the valve body (1) and is connected to a force arm (12); a spacer sleeve (14) is provided between the valve shaft 1 (9) and the force arm (12); the force arm (12) is connected to the output end of the cylinder head assembly (3) via a connecting shaft 1 (13); the fixed end of the cylinder head assembly (3) is movably connected to one end of a connecting shaft 2 (15); the other end of the connecting shaft 2 (15) is connected to the seat plate (11).

5. According to claim 3, a metal hard seal butterfly slow closing check valve with inclined seat, characterized in that The cylinder head assembly (3) comprises: a cylinder body (21), a base (23) being threadedly connected to the bottom end of the cylinder body (21), a piston (22) being slidably connected inside the cylinder body (21), a piston rod (20) being fixedly installed inside the piston (22), the piston rod (20) penetrating the cylinder body (21) and being connected to a connecting shaft (13), the bottom end of the piston rod (20) being connected to one end of a throttle rod (19), the other end of the throttle rod (19) being fixedly connected to a cap (18), the cap (18) being fixedly connected to the base (23), and a one-way valve (24) being arranged inside the piston (22).

6. According to claim 1, a metal hard seal butterfly slow closing check valve with inclined seat, characterized in that , the valve body (1) also includes: A flow rate sensor, used for detecting the flow rate of water in the valve body (1); A first water pressure sensor, used to detect the pressure of a water flow inlet on one side of the valve body (1); A second water pressure sensor, used to detect the pressure of the water outlet on the other side of the valve body (1); A controller and an alarm, wherein the controller is electrically connected to the flow rate sensor, the first water pressure sensor, the second water pressure sensor and the alarm.

7. According to claim 6, a tilted seat metal hard seal butterfly slow closing check valve is characterized in that The controller controls the alarm to work based on the flow rate sensor, the first water pressure sensor, and the second water pressure sensor, including the following steps: Step 1: Calculate the flow resistance coefficient of the valve body (1) according to formula (1): （1）； in is the water flow friction coefficient, is the flow rate sensor detection value, is the water flow density, is the acceleration due to gravity, is the inner diameter of the valve pipe, is the detection value of the first water pressure sensor, is the detection value of the second water pressure sensor, is the width of the valve, is the working time of the valve; Step 2: Calculate the actual gap flow rate formed between the butterfly plate (16) and the inner boundary of the valve body (1) according to the following formula (2): , the controller compares the actual gap flow formed by the butterfly plate (16) and the inner boundary of the valve body (1) Compared with the preset gap flow range, when the actual gap flow is higher than the preset gap flow range, the controller controls the alarm to sound: （2）； in is the dynamic viscosity of water flow, is the thickness of the butterfly plate (16), is the outer diameter of the butterfly plate (16), The value is 3.14.

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