Pressurizing type dynamic sealing check valve

Abstract

The invention relates to the technical field of check valve sealing, and discloses a pressurizing type dynamic sealing check valve which comprises a valve body, an extrusion disc is fixedly arranged at the bottom of a first connecting shaft, an adjusting sleeve is arranged on the outer wall of a pressure adjusting cover in a sleeving mode, through grooves are formed in the two sides of the adjusting sleeve, and a gear ring is fixedly arranged at the lower edge of the outer wall of the adjusting sleeve. According to the pressure regulating valve, when the valve body stops guiding liquid, the liquid level of the liquid inlet pipe is lowered, the electric hydraulic cylinder and the motor are started together, after the motor is started, the gear is rotated to be further engaged with the gear ring, the regulating sleeve rotates on the outer wall of the pressure regulating cylinder, the pressure regulating sleeve is rotated, and the pressure regulating sleeve is driven to rotate; when the pressure regulating device works, the through holes and the through grooves which are originally communicated with each other start to be staggered, all the through holes are covered and shielded, at the moment, the electric hydraulic rod pushes the first connecting shaft to drive the extrusion disc to be subjected to pressure drop in the pressure regulating cover, then the pressure intensity in the pressure regulating cylinder is increased, pressure is applied to a sealing area, and therefore the sealing effect of the device is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of check valve sealing, and specifically relates to a pressurized dynamic sealing check valve. Background Technology

[0002] A check valve, also known as a non-return valve, one-way valve, backflow valve, or isolation valve, is an automatic valve that relies on the pressure of the medium itself and the weight of the valve disc to automatically block backflow. It belongs to the category of automatic valves, and its valve disc movement methods include lift, swing, and butterfly types. The lift type is structurally similar to a gate valve but lacks a valve stem, while the swing type uses an inclined valve disc rotating around an axis. This valve is widely used in petrochemical, water supply and drainage systems, and as a foot valve in pumping devices to prevent water hammer and medium backflow. With the development of modern industry and production sectors, the discharge and use of liquids in industrial processes require guidance and discharge. In the liquid handling process, the check valve plays a crucial role in precisely controlling the discharge status of the liquid. Furthermore, with technological advancements, the functions and structure of check valves are constantly being improved, making them more efficient and convenient to use.

[0003] However, existing sealed check valves still have the following drawbacks during use: 1. Existing sealing check valves rely solely on the weight of the sealing block inside the valve body and the elasticity of the added spring to block the sealing block in the flow guiding area when sealing the valve body. This sealing method will cause the sealing block to be squeezed and lifted when there is a slight pressure difference between the two ends of the valve body, which will lead to the failure of the valve body seal and reduce the sealing effect of the check valve. 2. While existing pressurized check valves can effectively compress the sealing structure during the sealing pressurization process, preventing the valve from opening due to pressure differences, ordinary pressurized check valves require manual control of the pressurization equipment during the pressurization process. This makes it difficult to apply timely pressure to the valve body, resulting in poor sealing sensitivity. Furthermore, it requires constant monitoring of the valve's status for manual control, increasing the workload of the operators.

[0004] Therefore, it is necessary to invent a pressurized dynamic sealing check valve to solve the above problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a pressurized dynamic sealing check valve to solve the issues raised in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pressurized dynamic sealing check valve, comprising a valve body, an inlet pipe, an outlet pipe, two docking plates, and a mounting base, wherein an automatic pressurization and depressurization mechanism is installed on the top of the mounting base, and an automatic sensing component is installed inside the inlet pipe; The automatic pressurization and depressurization mechanism includes a pressure regulating cover mounted on the top of the mounting base. A gasket is fixedly provided on the top of the pressure regulating cover, and an electric hydraulic cylinder is mounted on the top of the gasket. A mounting frame is mounted on one side of the top of the mounting base, and a motor is mounted on the top of the mounting frame. A first connecting shaft is inserted through the inner wall of the pressure regulating cover, and one end of the first connecting shaft passes through the top of the pressure regulating cover and the top of the gasket and is inserted through the output end of the electric hydraulic cylinder. A pressing plate is fixedly provided at the bottom of the first connecting shaft. An adjusting sleeve is fitted on the outer wall of the pressure regulating cover. Through grooves are opened on both sides of the adjusting sleeve. A toothed ring is fixedly provided at the lower edge of the outer wall of the adjusting sleeve. A gear is rotatably connected to the inner wall of the mounting frame, and the outer wall of the gear meshes with the outer wall of the toothed ring. Multiple through holes are opened at equal intervals on both sides of the outer wall of the pressure regulating cover. Preferably, both ends of the outer wall of the pressure regulating cover are provided with annular limiting grooves, both ends of the inner wall of the adjusting sleeve are fixedly provided with limiting rings, and the outer walls of the two limiting rings are rotatably connected to the inner walls of the two annular limiting grooves respectively. One end of the gear passes through the top of the mounting frame and is fixedly connected to the output end of the motor. A lifting pad is inserted and connected at the lower edge of the inner wall of the pressure regulating cover, and the inner wall of the lifting pad is provided with a first vacuum groove.

[0007] Preferably, the inlet pipe is fixedly installed on one side of the valve body, the outlet pipe is installed on the other side of the valve body, the two docking plates are respectively fixedly installed at one end of the inlet pipe and one end of the outlet pipe, and the inner wall of the valve body is provided with a liquid guiding groove.

[0008] Preferably, a second connecting shaft is inserted through the inner wall of the liquid guiding groove, and one end of the second connecting shaft passes through the top of the mounting base and the inner wall of the pressure regulating cover and is fixedly connected to the bottom of the lifting pad. A sealing plate is fixedly provided at the bottom of the second connecting shaft, and a spring is fixedly provided at the top of the sealing plate at the outer edge of the second connecting shaft, and one end of the spring is fixedly connected to the bottom of the mounting base.

[0009] Preferably, the automatic sensing component includes a limiting cylinder fixedly installed on the upper side of one end of the inner wall of the inlet pipe. The inner wall of the limiting cylinder is provided with a limiting groove. A pressure sensor is installed on the top of the inner wall of the limiting groove. The electric hydraulic cylinder and the motor are electrically connected to the pressure sensor respectively.

[0010] Preferably, a contact plate is slidably connected to the inner wall of the limiting groove, and a third connecting shaft is fixedly connected to the bottom of the contact plate through the inner wall of the limiting cylinder. A float is fixedly provided at the bottom of the third connecting shaft, and a second vacuum groove is provided on the inner wall of the float.

[0011] Preferably, a control switch is installed on one side of the valve body, and the electric hydraulic cylinder, motor and pressure sensor are all electrically connected to an external power source through the control switch.

[0012] The technical effects and advantages of this invention are as follows: 1. In this invention, when the valve body stops guiding liquid, the liquid in the inlet pipe continuously decreases, causing the liquid level to drop. This triggers the automatic sensing component, causing the electric hydraulic cylinder and motor to start together. After the motor starts, the rotating gear meshes with the gear ring, causing the adjusting sleeve to rotate on the outer wall of the pressure regulating cylinder. This causes the interconnected through holes and through slots to begin to misalign until the closed area of ​​the adjusting sleeve completely covers and blocks all the through holes. At this time, the motor stops driving. Meanwhile, the electric hydraulic rod pushes the first connecting shaft, causing it to carry the extrusion plate and reduce the pressure in the pressure regulating cover. This increases the pressure in the pressure regulating cylinder and applies pressure to the lifting pad, causing the second connecting shaft to be squeezed. This applies pressure to the sealing area, making the valve body seal more tightly, thereby improving the sealing effect of the equipment. 2. In this invention, when liquid enters through the inlet pipe, the liquid level continuously rises. A second vacuum groove is provided inside the float, causing it to rise continuously with the increasing liquid level. Through a third connecting shaft, the contact plate slides and rises within a limiting groove inside the limiting cylinder until it contacts the pressure sensor. At this point, due to the principle of communicating vessels, the liquid level at the end of the inlet pipe also reaches the height of the contact sealing plate area. The pressure sensor is then triggered, controlling the electric hydraulic cylinder and motor to open the through hole and stop the pressurization. The sealing plate can then be normally opened by the liquid for drainage. Throughout the process, no manual control or adjustment of the pressurization structure is required. The valve body automatically exits pressurization when the liquid level in the inlet pipe reaches a certain point, facilitating timely liquid discharge. Furthermore, when liquid entry stops and the liquid level drops, causing the contact plate to lose contact with the pressure sensor, the electric hydraulic cylinder and motor can be driven to pressurize it, thereby improving the valve body's sealing sensitivity and reducing the workload of the operator.

[0013] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

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

[0015] Figure 1 This is a schematic diagram of the valve body in the depressurization state of the present invention; Figure 2 This is a schematic diagram of the valve body in the pressurized state of the present invention; Figure 3 This is a schematic diagram of the inside of the pressure regulating cover of the present invention; Figure 4 This is a schematic diagram of the adjusting sleeve of the present invention; Figure 5 This is a schematic diagram of the interior of the pressure regulating cover of the present invention; Figure 6 This is a schematic diagram of the interior of the valve body, inlet pipe, and outlet pipe of the present invention; Figure 7 This is an appendix to the specification of this invention. Figure 6 A magnified diagram of point A in the middle.

[0016] In the diagram: 1. Valve body; 2. Inlet pipe; 3. Outlet pipe; 4. Connecting plate; 5. Mounting base; 6. Automatic pressurization and depressurization mechanism; 601. Pressure regulating cover; 602. Gasket; 603. Electric hydraulic cylinder; 604. Mounting bracket; 605. Motor; 606. First connecting shaft; 607. Extrusion plate; 608. Adjusting sleeve; 609. Through groove; 610. Gear ring; 611. Gear; 612. Through hole; 6 13. Annular limiting groove; 614. Limiting ring; 615. Lifting pad; 616. First vacuum tank; 7. Liquid guiding groove; 8. Second connecting shaft; 9. Sealing plate; 10. Spring; 11. Automatic sensing component; 1101. Limiting cylinder; 1102. Limiting slide groove; 1103. Pressure sensor; 1104. Contact plate; 1105. Third connecting shaft; 1106. Float; 1107. Second vacuum tank. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This invention provides, for example Figure 1-7The pressure-filled dynamic sealing check valve shown includes a valve body 1, an inlet pipe 2, an outlet pipe 3, two docking plates 4, and a mounting base 5. An automatic pressure-filling and pressure-releasing mechanism 6 is installed on the top of the mounting base 5, and an automatic sensing component 11 is installed inside the inlet pipe 2. The automatic pressurization and depressurization mechanism 6 includes a pressure regulating cover 601 mounted on the top of the mounting base 5. A gasket 602 is fixedly provided on the top of the pressure regulating cover 601, and an electric hydraulic cylinder 603 is mounted on the top of the gasket 602. A mounting bracket 604 is mounted on one side of the top of the mounting base 5, and a motor 605 is mounted on the top of the mounting bracket 604. A first connecting shaft 606 is inserted and connected to the inner wall of the pressure regulating cover 601, and one end of the first connecting shaft 606 passes through the top of the pressure regulating cover 601 and the top of the gasket 602 respectively. The output end of the electric hydraulic cylinder 603 is inserted and connected. The bottom of the first connecting shaft 606 is fixedly provided with a pressing plate 607. The outer wall of the pressure regulating cover 601 is fitted with an adjusting sleeve 608. Both sides of the adjusting sleeve 608 are provided with through grooves 609. The lower edge of the outer wall of the adjusting sleeve 608 is fixedly provided with a toothed ring 610. The inner wall of the mounting bracket 604 is rotatably connected with a gear 611, and the outer wall of the gear 611 meshes with the outer wall of the toothed ring 610. Both sides of the outer wall of the pressure regulating cover 601 are provided with multiple through holes 612 at equal intervals. In use, when the valve body 1 stops guiding liquid, the liquid in the inlet pipe 2 continuously decreases, causing the liquid level to drop. This triggers the automatic sensing component 11, causing the electric hydraulic cylinder 603 and the motor 605 to start together. After the motor 605 starts, the rotating gear 611 meshes with the gear ring 610, causing the adjusting sleeve 608 to rotate on the outer wall of the pressure regulating cylinder 601. This causes the originally interconnected through holes 612 and through grooves 609 to begin to misalign until the closed area of ​​the adjusting sleeve 608 completely covers and blocks all through holes 612. Then the motor 605 stops driving. At this time, the electric hydraulic rod 603 pushes the first connecting shaft 606, causing it to carry the extrusion plate 607 and reduce the pressure in the pressure regulating cover 601. This increases the pressure in the pressure regulating cylinder 601 and applies pressure to the lifting pad 615, causing the second connecting shaft 8 to be squeezed. This applies pressure to the sealing area, so that when the liquid in the valve body 1 decreases, the equipment can pressurize and seal it immediately, thereby improving the sealing effect of the equipment.

[0019] Both ends of the outer wall of the pressure regulating cover 601 are provided with annular limiting grooves 613, and both ends of the inner wall of the adjusting sleeve 608 are fixedly provided with limiting rings 614. The outer walls of the two limiting rings 614 are rotatably connected to the inner walls of the two annular limiting grooves 613 respectively. One end of the gear 611 passes through the top of the mounting bracket 604 and is fixedly connected to the output end of the motor 605. A lifting pad 615 is inserted and connected at the lower edge of the inner wall of the pressure regulating cover 601. The inner wall of the lifting pad 615 is provided with a first vacuum groove 6. 16. The sealing area rises as the liquid level rises, thereby opening the liquid guide groove 7. When the second connecting shaft 8 rises, it will bring the lifting pad 615 up with it. The lifting pad 615 has a first vacuum groove 616 inside, which can reduce its own weight and facilitate its smooth rise. When the seal is opened, the adjusting sleeve 608 rotates to the state where the through groove 609 and the through hole 612 are connected, reducing the pressure inside the pressure regulating cover 601, so that the lifting pad 615 can rise quickly without being affected by resistance. Furthermore, the inlet pipe 2 is fixedly installed on one side of the valve body 1, and the outlet pipe 3 is installed on the other side of the valve body 1. Two connecting plates 4 are respectively fixedly installed at one end of the inlet pipe 2 and one end of the outlet pipe 3. A liquid guiding groove 7 is provided on the inner wall of the valve body 1, as shown in the instruction manual. Figure 6 As shown, the inlet pipe 2 and the outlet pipe 3 are installed on both sides of the valve body 1, and the installation height of the outlet pipe 3 is higher than that of the inlet pipe 2, so that after the valve body 1 is sealed, the liquid in the outlet pipe 3 is not easy to flow back.

[0020] The inner wall of the liquid guiding groove 7 is connected to a second connecting shaft 8, and one end of the second connecting shaft 8 passes through the top of the mounting base 5 and the inner wall of the pressure regulating cover 601 and is fixedly connected to the bottom of the lifting pad 615. A sealing plate 9 is fixedly provided at the bottom of the second connecting shaft 8. A spring 10 is fixedly provided at the top of the sealing plate 9 at the outer edge of the second connecting shaft 8, and one end of the spring 10 is fixedly connected to the bottom of the mounting base 5. When the liquid inlet pipe 2 is filled, it will squeeze the sealing plate 9 and compress the spring 10 to open the liquid guiding groove 7, and the liquid will enter the liquid outlet pipe 3 through the liquid guiding groove 7 for drainage. Furthermore, the automatic sensing component 11 includes a limiting cylinder 1101 fixedly installed on the upper side of one end of the inner wall of the inlet pipe 2. A limiting groove 1102 is formed on the inner wall of the limiting cylinder 1101. A pressure sensor 1103 is installed at the top of the inner wall of the limiting groove 1102. The electric hydraulic cylinder 603 and the motor 605 are electrically connected to the pressure sensor 1103. The limiting groove 1102 inside the limiting cylinder 1101 is as shown in the attached instruction manual. Figure 7 As shown, the lower edge of its inner wall is protruding, so that when there is no liquid in the liquid inlet pipe 2, the third connecting shaft 1105 will not detach from the inner wall of the limiting cylinder 1101 when it falls freely, making it convenient to float up and contact the pressure sensor 1103 again next time.

[0021] A contact plate 1104 is slidably connected to the inner wall of the limiting groove 1102. The bottom of the contact plate 1104 passes through the inner wall of the limiting cylinder 1101 and is fixedly connected to a third connecting shaft 1105. A float 1106 is fixedly installed at the bottom of the third connecting shaft 1105. A second vacuum groove 1107 is opened on the inner wall of the float 1106. When liquid enters through the liquid inlet pipe 2, the liquid level in the liquid inlet pipe 2 rises continuously. The float 1106 is continuously raised by the second vacuum groove 1107 inside, and it floats up continuously as the liquid level rises. Through the third connecting shaft 1105, the contact plate 1104 slides and rises in the limiting groove 1102 inside the limiting cylinder 1101 until the contact plate 1104 contacts the pressure sensor 1103. At this time, due to the principle of communicating vessels... When the liquid level at the end of the inlet pipe 2 reaches the height of the contact sealing disc 9, the pressure sensor 1103 is triggered and controls the electric hydraulic cylinder 603 and the motor 605 to open the through hole 612 and stop the pressurization. At this time, the sealing disc 9 can be normally pushed open by the liquid for drainage. Throughout the process, no manual control or adjustment of the pressurization structure is required. The valve body 1 can automatically exit the pressurization when the liquid in the inlet pipe 2 reaches a certain level, which facilitates the timely discharge of the liquid. When the liquid inlet pipe 2 stops flowing and the liquid level drops, causing the contact disc 1104 to lose contact with the pressure sensor 1103, the electric hydraulic cylinder 603 and the motor 605 can be driven to pressurize it, thereby improving the sealing sensitivity of the valve body 1 and reducing the workload of the operator.

[0022] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressurized dynamic sealing check valve, comprising a valve body (1), an inlet pipe (2), an outlet pipe (3), two mating discs (4), and a mounting base (5), characterized in that: The top of the mounting base (5) is equipped with an automatic pressurization and depressurization mechanism (6), and the inside of the liquid inlet pipe (2) is equipped with an automatic sensing component (11). The automatic pressurization and depressurization mechanism (6) includes a pressure regulating cover (601) mounted on the top of the mounting base (5). A gasket (602) is fixedly provided on the top of the pressure regulating cover (601). An electric hydraulic cylinder (603) is mounted on the top of the gasket (602). A mounting bracket (604) is mounted on one side of the top of the mounting base (5). A motor (605) is mounted on the top of the mounting bracket (604). A first connecting shaft (606) is inserted through the inner wall of the pressure regulating cover (601), and one end of the first connecting shaft (606) passes through the top of the pressure regulating cover (601) and the top of the gasket (602). The first connecting shaft (606) is fixedly provided with a pressing plate (607) at the bottom of the first connecting shaft (606) and the output end of the electric hydraulic cylinder (603). The outer wall of the pressure regulating cover (601) is fitted with an adjusting sleeve (608). Both sides of the adjusting sleeve (608) are provided with through grooves (609). A toothed ring (610) is fixedly provided at the lower edge of the outer wall of the adjusting sleeve (608). The inner wall of the mounting bracket (604) is rotatably connected with a gear (611), and the outer wall of the gear (611) meshes with the outer wall of the toothed ring (610). Both sides of the outer wall of the pressure regulating cover (601) are provided with multiple through holes (612) at equal distances.

2. The pressurized dynamic sealing check valve according to claim 1, characterized in that: Both ends of the outer wall of the pressure regulating cover (601) are provided with annular limiting grooves (613), both ends of the inner wall of the adjusting sleeve (608) are fixedly provided with limiting rings (614), and the outer walls of the two limiting rings (614) are rotatably connected to the inner walls of the two annular limiting grooves (613), one end of the gear (611) passes through the top of the mounting bracket (604) and is fixedly connected to the output end of the motor (605), and a lifting pad (615) is inserted and connected at the lower edge of the inner wall of the pressure regulating cover (601), and the inner wall of the lifting pad (615) is provided with a first vacuum groove (616).

3. The pressurized dynamic sealing check valve according to claim 1, characterized in that: The inlet pipe (2) is fixedly installed on one side of the valve body (1), the outlet pipe (3) is installed on the other side of the valve body (1), the two docking plates (4) are fixedly installed at one end of the inlet pipe (2) and one end of the outlet pipe (3), and the inner wall of the valve body (1) is provided with a liquid guiding groove (7).

4. A pressurized dynamic sealing check valve according to claim 3, characterized in that: The inner wall of the liquid guide groove (7) is connected to a second connecting shaft (8), and one end of the second connecting shaft (8) passes through the top of the mounting base (5) and the inner wall of the pressure regulating cover (601) and is fixedly connected to the bottom of the lifting pad (615). A sealing plate (9) is fixedly provided at the bottom of the second connecting shaft (8). A spring (10) is fixedly provided at the top of the sealing plate (9) at the outer edge of the second connecting shaft (8), and one end of the spring (10) is fixedly connected to the bottom of the mounting base (5).

5. A pressurized dynamic sealing check valve according to claim 1, characterized in that: The automatic sensing component (11) includes a limiting cylinder (1101) fixedly installed on the upper side of one end of the inner wall of the liquid inlet pipe (2). The inner wall of the limiting cylinder (1101) is provided with a limiting groove (1102). A pressure sensor (1103) is installed on the top of the inner wall of the limiting groove (1102). The electric hydraulic cylinder (603) and the motor (605) are electrically connected to the pressure sensor (1103).

6. A pressurized dynamic sealing check valve according to claim 5, characterized in that: The inner wall of the limiting groove (1102) is slidably connected to a contact plate (1104). The bottom of the contact plate (1104) passes through the inner wall of the limiting cylinder (1101) and is fixedly connected to a third connecting shaft (1105). A float (1106) is fixedly provided at the bottom of the third connecting shaft (1105). A second vacuum groove (1107) is provided on the inner wall of the float (1106).

7. A pressurized dynamic sealing check valve according to claim 1, characterized in that: A control switch is installed on one side of the valve body (1), and the electric hydraulic cylinder (603), motor (605) and pressure sensor (1103) are all electrically connected to an external power source through the control switch.

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