High-sealing-performance quick-reset check valve

Abstract

The invention discloses a high-sealing-performance quick reset check valve, and relates to the technical field of valves, when a reverse pressure difference is generated between a liquid inlet pipeline system and a liquid outlet pipeline system on two sides of a setting valve core, a balance plate can fall adaptively, and the width of a bevel edge, corresponding to a through groove, of the balance plate is gradually narrowed, so that the sealing performance of the valve core is greatly improved. At the moment, under the reset opening effect of a second spring, the inclined face of a through groove still keeps the posture of being attached to the bevel edge of the balance plate, the two corresponding driven plates horizontally slide in a gradually-away mode along a limiting groove, and the gradually-expanded driven plates further pressurize and seal a rubber sealing body located in a setting area through a connecting plate; the pressure difference between the liquid outlet pipeline system and the liquid inlet pipeline system is used for further pressurizing and sealing the setting valve element and the setting area of the valve body, and high sealing performance can be achieved in a small pipeline pressure system without increasing the reset force of the setting valve element.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a high-sealing quick-resetting check valve. Background Art

[0002] A check valve is a valve used to prevent the reverse flow of a medium. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve or isolation valve. Its main functions include: preventing the reverse flow of the medium: the check valve ensures that the medium can only flow in one direction in the pipeline, preventing its reverse flow, thus avoiding various accidents caused by the reverse flow of the medium and ensuring the normal operation of the pipeline system; preventing the pump and the driving motor from reversing: the check valve can prevent the pump and its driving motor from reversing when the medium reverses, thus protecting these devices from damage and extending their service life; preventing the release of the medium in the container: in certain situations, the check valve can also prevent the release of the medium in the container, thus maintaining the stability and safety of the system.

[0003] The check valve mainly consists of a valve body, a valve flap, a valve seat, etc. The valve flap is connected to the valve seat through a valve stem or directly. The valve seat is located at the center line position of the valve body. When the medium flows into the check valve from the inlet end, the pressure of the medium acts on the lower part of the valve flap, overcoming the gravity and spring force of the valve flap, causing the valve flap to rise and leave the valve seat, thereby allowing the medium to pass through the valve smoothly. When the medium flow stops or attempts to flow in the reverse direction, due to the lack of pressure support from the inlet end, the valve flap descends and tightly adheres to the valve seat under the action of its own gravity and spring force, thus cutting off the passage and preventing the reverse flow of the medium.

[0004] Among them, the design of the sealing surface between the valve flap and the valve seat determines the opening and closing stability of the check valve, and the seal arranged in the sealing surface is used to be compressed to form a ring seal. Generally speaking, the deformation amount of the seal is positively correlated with the sealing effect, and the deformation amount of the seal is also affected by the reset force of the valve flap (the weight of the valve flap, and if an auxiliary reset spring is set, its reset elastic force also needs to be accumulated on the weight of the valve flap). Simply put, the greater the reset force of the valve flap, the greater the deformation amount of the seal and the better the sealing performance. However, the magnitude of the reset force design of the valve flap is associated with the normal water / gas pressure in the implemented pipeline system. In a pipeline system with a relatively low pressure, strengthening the sealing performance by setting a relatively large reset force of the valve flap often results in more losses than gains. On the contrary, it may also cause a relatively large resistance when the valve flap opens, resulting in obvious jerks.

[0005] Therefore, on the basis of the original check valve, the present invention makes an innovative design and proposes a high-sealing quick-resetting check valve that does not require additional increase in the reset force of the valve flap. Summary of the Invention

[0006] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution significantly different from the existing technologies. Specifically, the purpose of the present invention is to provide a high-sealing and quick-resetting check valve to solve the problem proposed in the above background technology that the sealing surface design between the valve flap and the valve seat determines the opening and closing stability of the check valve, and the sealant set in the sealing surface is used to be compressed to form a ring seal. Generally speaking, the deformation amount of the sealant is positively correlated with the sealing effect, and the deformation amount of the sealant is also affected by the reset force of the valve flap (the weight of the valve flap, and if an auxiliary reset spring is set, its reset elastic force also needs to be accumulated on the weight of the valve flap). Simply put, the greater the reset force of the valve flap, the greater the deformation amount of the sealant, and the better the sealing performance. However, the size of the designed reset force of the valve flap is associated with the normal water / air pressure in the implemented pipeline system. Strengthening the sealing performance by setting a larger reset force of the valve flap in a pipeline system with a smaller pressure often results in more losses than gains. On the contrary, it may also cause a large resistance when the valve flap opens, resulting in an obvious jerky problem.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A high-sealing and quick-resetting check valve includes a valve body, and also includes a seated valve core that is seated and cooperated with the conical annular inner wall of the valve body, rubber seals that are arranged at equal angular displacements on the side wall of the seated valve core to enhance the seal, and a balance adjustment assembly that is arranged in the central cavity of the seated valve core to compare the water pressures on both sides of the seated valve core and adaptively switch between the compressed seal and the retracted unsealed states of the rubber seals. The rubber seals and the balance adjustment assembly are connected by a driven plate.

[0008] Preferably, a compensation mechanism is arranged between the T-shaped upper end of the seated valve core and the valve body to adjust the seating force of the seated valve core; A cavity groove that is slidably matched with the T-shaped upper end of the seated valve core is opened at the upper end of the valve body.

[0009] Preferably, the compensation mechanism includes a pressure compensation plate that is slidably matched with the cavity groove and a compensation spring that is arranged between the pressure compensation plate and the T-shaped upper end of the seated valve core; The compensation mechanism further includes a threaded adjustment knob that is rotatably connected to the pressure compensation plate and is threadedly penetrated and connected to the upper end of the valve body.

[0010] Preferably, the fitting area between the conical annular inner wall of the valve body and the seated valve core is the seating area; The rubber seals arranged at equal angular displacements achieve a ring seal for the seating area; The rubber seals are arc-shaped bodies.

[0011] Preferably, sliding cavities are opened at equal angular displacements on the side wall of the seated valve core corresponding to the rubber seals; A connecting plate is fixed on the inner surface of the rubber seal that is slidably arranged inside the sliding cavity, and the connecting plate is fixedly connected to the end of the driven plate; The interior of the setting valve core is provided with a limiting groove for the horizontal sliding of the driven plate; A second spring is fixed between two of the driven plates that face each other in pairs.

[0012] Preferably, a sliding groove communicating with the valve body is provided inside the T-shaped upper end of the setting valve core; The balance adjustment assembly includes a lower piston disk slidably arranged in a sealed manner in the central cavity of the setting valve core, an upper piston disk slidably arranged inside the sliding groove, and a balance plate fixedly arranged between the lower piston disk and the upper piston disk at equal angles; It further includes a first spring arranged inside the sliding groove to provide a supporting force.

[0013] Preferably, the upper end of the first spring is fixed to the inner wall of the sliding groove, and the other end of the first spring is fixed to the upper surface of the upper piston disk.

[0014] Preferably, the balance plate is arranged corresponding to the driven plate, and the balance plate is composed of an upper vertical plate and a lower inclined panel; The interior of the setting valve core is provided with a vertical groove for the lifting and sliding of the upper vertical plate; A through groove for the penetration of the lower inclined panel is provided at the end of the driven plate.

[0015] Preferably, the lower inclined panel is provided with an inclined side, and the width of the lower inclined panel increases from top to bottom; One side of the through groove is provided with an inclined surface that fits and matches the inclined side of the balance plate; And a space for adapting to the width change during the lifting of the lower inclined panel is reserved on the other side opposite to the inclined surface of the through groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. When the water pressure in the liquid inlet pipeline system is greater than the sum of the water pressure in the liquid outlet pipeline system and the valve flap reset force, the lower piston disk is pushed upward and drives the four balance plates to synchronously move vertically upward, so that the upper piston disk moves vertically upward against the water pressure in the liquid outlet pipeline system. When the balance plate moves vertically upward, its inclined side will produce a horizontal extrusion and pushing effect on the inclined surface inside the through groove, causing the two opposite driven plates to approach and driving the corresponding connecting plates and rubber seals to retract into the corresponding sliding cavities, releasing the pressing and sealing effect of the rubber seals in the setting area. And when the lower piston disk rises to a certain extent, under the continuous action of the water pressure in the liquid inlet pipeline system, the whole setting valve core will be pushed up and compress the compensation spring in the compensation mechanism, so that the water in the liquid inlet pipeline system can smoothly enter the liquid outlet pipeline system through the opened setting area. At this time, the rubber seals arranged at equal angles and misaligned are all retracted into the setting valve core to reduce the erosion effect of the long-term water flow on the edges of the rubber seals, playing a further protective role for the rubber seals; When the water pressure in the inlet pipeline system is less than the sum of the water pressure in the outlet pipeline system and the valve disc reset force, the seated valve core will quickly fall and reset and realize the ring seal again. Since the water pressure in the inlet pipeline system is reduced, while the water pressure in the outlet pipeline system still exists and the seated valve core closes the seated area and no water flows out, a reverse pressure difference is generated between the inlet pipeline system and the outlet pipeline system on both sides of the seated valve core. Since the upper piston disc is exposed in the outlet pipeline system and the lower piston disc is exposed in the inlet pipeline system, the pressure difference will force the upper piston disc, the balance plate and the lower piston disc to fall vertically. When the balance plate falls vertically, the pressure As the width of the oblique side corresponding to the balancing plate and the through groove gradually narrows, under the reset and expansion action of the second spring, the oblique side of the through groove will still maintain the posture of fitting the oblique side of the balancing plate and make the corresponding two driven plates slide horizontally gradually away from each other along the limit groove, and the gradually expanded driven plate will further pressurize and seal the rubber sealing body in the setting area through the connecting plate, and further pressurize and seal the setting valve core and the valve body setting area by utilizing the pressure difference between the liquid outlet pipeline system and the liquid inlet pipeline system, so that a higher sealing performance can be achieved in a smaller pipeline pressure system without increasing the reset force of the setting valve core; At the same time, a compensation mechanism is additionally provided at the upper end of the elastic connection between the valve body and the seated valve core. When the compensation spring is repeatedly worked and fatigued and worn after long-term use of the check valve, or when the system pressure adjustment needs to increase or decrease the pressure of the entire pipeline system, the threaded adjustment knob can be rotated to make the pressure compensation plate fall vertically along the cavity and compress the compensation spring provided between the upper end of the seated valve core, so as to increase the downward pressure of the compensation spring on the seated valve core, thereby increasing the reset force of the seated valve core to compensate for the loss of elastic force of the compensation spring due to fatigue wear. At the same time, it can also meet the reset force adjustment of the seated valve core required for system pressure adjustment, ensuring that the seated valve core can always maintain the rapid reset response during initial installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the first three-dimensional structure of the valve body and the seated valve core after being cut open.

[0019] Figure 3 It is a second three-dimensional structural schematic diagram of the valve body and the seated valve core after being cut open.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention after being cut apart as a whole.

[0021] Figure 5 It is a schematic diagram of the plane principle of the present invention.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the sealing valve core of the present invention.

[0023] Figure 7 This is a schematic diagram of the connection relationship between the balance adjustment component and the rubber seal body of the present invention.

[0024] Figure 8 For the present invention Figure 2 The enlarged structural schematic diagram at position A in the present invention.

[0025] In the figure: 1. Valve body; 2. Setting valve core; 21. Sliding cavity; 22. First spring; 3. Compensation mechanism; 4. Rubber seal body; 41. Connecting plate; 5. Lower piston disc; 6. Upper piston disc; 7. Balance plate; 8. Driven plate; 81. Through groove; 9. Second spring. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1 to 8 , the present invention provides a technical solution: a high-sealing quick-resetting check valve, including a valve body 1, and further including a setting valve core 2 that is seated and matched with the conical annular inner wall of the valve body 1, a rubber seal body 4 that is arranged at equal angular displacements on the side wall of the setting valve core 2 to enhance sealing, and a balance adjustment component that is arranged in the central channel of the setting valve core 2 to compare the water pressures on both sides of the setting valve core 2 and adaptively switch between the compressed sealing and retracted unsealing states of the rubber seal body 4. The rubber seal body 4 is connected to the balance adjustment component through a driven plate 8.

[0028] As a further embodiment of the present invention, when the water pressure in the liquid inlet pipeline system is greater than the sum of the water pressure in the liquid outlet pipeline system and the valve flap reset force, the water entering the interior of the valve body 1 from the lower liquid inlet pipe will first push the lower piston disc 5 upward. The lower piston disc 5 will drive the four balance plates 7 above it to move vertically upward synchronously. The vertically upward moving balance plates 7 will also synchronously drive the upper piston disc 6 to move vertically upward against the water pressure in the liquid outlet pipeline system and compress the first spring 22; When the balance plate 7 moves vertically upward, the hypotenuse of the balance plate 7 will exert a horizontal squeezing and pushing force on the inclined plane inside the through groove 81. At the same time, since the driven plate 8 is limited by the limiting groove inside the setting valve core 2, the two opposite driven plates 8 will gradually slide horizontally closer to each other and compress the second spring 9. At the same time, the driven plate 8 will drive the corresponding connecting plate 41 and the rubber seal 4 to retract into the corresponding sliding cavity 21, releasing the pressing and sealing effect of the rubber seal 4 in the setting area. And when the lower piston disc 5 rises to a certain extent, under the continuous action of the water pressure in the liquid inlet pipeline system, the setting valve core 2 as a whole will be lifted and compress the compensation spring in the compensation mechanism 3, so that the water in the liquid inlet pipeline system can smoothly enter the liquid outlet pipeline system through the opened setting area. At this time, all the rubber seals 4 arranged at equal-angle misalignment are retracted into the setting valve core 2 to reduce the erosion of the edge of the rubber seal 4 by the long-term water flow, which plays a further protective role for the rubber seal 4.

[0029] A compensation mechanism 3 for adjusting the setting force of the setting valve core 2 is arranged between the T-shaped upper end of the setting valve core 2 and the valve body 1; A cavity groove that is slidably matched with the T-shaped upper end of the setting valve core 2 is opened at the upper end of the valve body 1.

[0030] The compensation mechanism 3 includes a pressure compensation plate that is slidably matched with the cavity groove and a compensation spring arranged between the pressure compensation plate and the T-shaped upper end of the setting valve core 2; The compensation mechanism 3 further includes a threaded adjustment knob that is rotatably connected to the pressure compensation plate and is threadedly connected through the upper end of the valve body 1.

[0031] As a further embodiment of the present invention, when the compensation spring is repeatedly worked and fatigued and worn after the check valve is used for a long time, or when the system pressure needs to be increased or decreased due to system pressure adjustment, at this time, the threaded adjustment knob can be rotated to make the pressure compensation plate vertically fall along the cavity groove and compress the compensation spring arranged between the upper end of the setting valve core 2, so as to increase the downward pressure of the compensation spring on the setting valve core 2, thereby increasing the reset force of the setting valve core 2 to make up for the elastic force loss of the compensation spring due to fatigue wear, and at the same time, it can also meet the adjustment of the reset force of the setting valve core 2 required for system pressure adjustment.

[0032] The fitting area between the conical annular inner wall of the valve body 1 and the setting valve core 2 is the setting area; The rubber seals 4 arranged at equal-angle misalignment realize the ring seal of the setting area; The rubber seal 4 is an arc-shaped body.

[0033] As a further embodiment of the present invention, the contact surface between the rubber seal 4 and the conical annular inner wall of the valve body 1 is arranged as a matching conical surface to achieve further fitting and strengthen the sealing effect of the setting area.

[0034] The side wall of the setting-down valve core 2 is provided with sliding cavities 21 at equal angular displacements corresponding to the rubber sealing body 4; On the inner surface of the rubber sealing body 4 slidably arranged inside the sliding cavity 21, a connecting plate 41 is fixed, and the connecting plate 41 is fixedly connected to the end of the driven plate 8; The interior of the setting-down valve core 2 is provided with a limiting groove for the horizontal sliding of the driven plate 8; A second spring 9 is fixed between two opposite driven plates 8.

[0035] As a further embodiment of the present invention, when the water pressure in the liquid inlet pipeline system is less than the sum of the water pressure in the liquid outlet pipeline system and the valve flap reset force, at this time, under the reset action of the first spring 22, the gravity of the setting-down valve core 2, and the water pressure in the liquid outlet pipeline system, the setting-down valve core 2 will quickly fall and reset to achieve ring sealing again. Since the water pressure in the liquid inlet pipeline system decreases, while the water pressure in the liquid outlet pipeline system still exists and the setting-down valve core 2 seals the setting-down area and no longer discharges water, at this time, a reverse pressure difference is generated between the liquid inlet pipeline system and the liquid outlet pipeline system on both sides of the setting-down valve core 2, that is, the water pressure in the liquid inlet pipeline system is less than the water pressure in the liquid outlet pipeline system. At this time, since the upper piston disc 6 is exposed in the liquid outlet pipeline system and the lower piston disc 5 is exposed in the liquid inlet pipeline system, a pressure difference will appear between the upper piston disc 6 and the lower piston disc 5, and the pressure difference will force the upper piston disc 6, the balance plate 7, and the lower piston disc 5 to fall vertically. When the balance plate 7 falls vertically, since the width of the hypotenuse corresponding to the through groove 81 of the balance plate 7 gradually becomes narrower, at this time, under the reset and expanding action of the second spring 9, the inclined surface of the through groove 81 will still maintain the posture of fitting the hypotenuse of the balance plate 7 and make the corresponding two driven plates 8 slide horizontally away from each other along the limiting groove. The gradually expanding driven plates 8 will further pressurize and seal the rubber sealing body 4 located in the setting-down area through the connecting plate 41, and utilize the pressure difference between the liquid outlet pipeline system and the liquid inlet pipeline system to realize further pressurization and sealing of the setting-down area of the setting-down valve core 2 and the valve body 1, and high tightness can be achieved in a smaller pipeline pressure system without increasing the reset force of the setting-down valve core 2.

[0036] A chute communicating with the valve body 1 is provided inside the T-shaped upper end of the setting-down valve core 2; The balance adjustment assembly includes a lower piston disc 5 slidably arranged in a sealed manner in the central cavity of the setting-down valve core 2, an upper piston disc 6 slidably arranged inside the chute, and a balance plate 7 fixedly arranged at equal angles between the lower piston disc 5 and the upper piston disc 6; It further includes a first spring 22 arranged inside the chute to provide a supporting force.

[0037] As a further embodiment of the present invention, when there is a pressure difference in the liquid inlet and outlet pipe system, the balance adjustment assembly composed of the upper piston disc 6, the balance plate 7 and the lower piston disc 5 will react first and undergo adaptive lifting changes.

[0038] The upper end of the first spring 22 is fixed to the inner wall of the chute, and the other end of the first spring 22 is fixed to the upper surface of the upper piston disc 6.

[0039] As a further embodiment of the present invention, the first spring 22 is only used for resetting the upper piston disc 6, the balance plate 7 and the lower piston disc 5 when the water pressure in the liquid inlet and outlet pipe system is the same.

[0040] The balance plate 7 is correspondingly arranged with the driven plate 8, and the balance plate 7 is composed of an upper vertical plate and a lower inclined panel; The inner part of the setting valve core 2 is provided with a vertical groove for the upper vertical plate to slide up and down. The end of the driven plate 8 is provided with a through groove 81 for the lower inclined panel to penetrate through.

[0041] The lower inclined panel is provided with an inclined side, and the width of the lower inclined panel increases from top to bottom; One side of the through groove 81 is set as an inclined surface that fits and matches the inclined side of the balance plate 7; And a space is reserved on the other side opposite to the inclined surface of the through groove 81 to adapt to the width change when the lower inclined panel moves up and down.

[0042] As a further embodiment of the present invention, when the balance plate 7 moves vertically upward, the inclined side of the balance plate 7 will exert a horizontal extrusion and pushing effect on the inclined surface inside the through groove 81. At the same time, since the driven plate 8 is limited by the limiting groove inside the setting valve core 2, the two opposite driven plates 8 will gradually slide horizontally closer to each other and compress the second spring 9. At the same time, the driven plate 8 will drive the corresponding connecting plate 41 and the rubber seal 4 to retract into the corresponding sliding cavity 21, releasing the pressing and sealing effect of the rubber seal 4 in the setting area; When the balance plate 7 moves vertically downward, since the width of the inclined side of the balance plate 7 corresponding to the through groove 81 gradually becomes narrower, at this time, under the reset and expansion action of the second spring 9, the inclined surface of the through groove 81 will still maintain the posture of fitting the inclined side of the balance plate 7 and make the corresponding two driven plates 8 slide horizontally away from each other along the limiting groove. The gradually expanding driven plate 8 will further pressurize and seal the rubber seal 4 located in the setting area through the connecting plate 41, and utilize the pressure difference between the liquid outlet pipe system and the liquid inlet pipe system to realize further pressurization and sealing of the setting area of the setting valve core 2 and the valve body 1. Higher sealing performance can be achieved in a smaller pipeline pressure system without increasing the reset force of the setting valve core 2.

[0043] Working principle: When using this high-sealing quick-resetting check valve, it is first necessary to clarify that in a normal pipeline system, whether it is the liquid inlet pipeline system or the liquid outlet pipeline system, the water body is mostly in a full state most of the time. It's just that when the water pressure in the liquid inlet pipeline system is greater than the sum of the water pressure in the liquid outlet pipeline system and the valve flap reset force, the valve will be pushed up and opened, and vice versa, the valve will close.

[0044] When the water pressure in the liquid inlet pipeline system is greater than the sum of the water pressure in the liquid outlet pipeline system and the valve flap reset force, as Figure 2 and Figure 5 shown, the water entering the inside of the valve body 1 from the lower liquid inlet pipe will first push the lower piston disc 5 upwards. The lower piston disc 5 will drive the four balance plates 7 above it to move vertically upwards synchronously. The vertically moving balance plates 7 will also synchronously drive the upper piston disc 6 to move vertically upwards against the water pressure in the liquid outlet pipeline system and compress the first spring 22; At the same time, as Figure 7 and Figure 8 shown, when the balance plate 7 moves vertically upwards, the hypotenuse of the balance plate 7 will exert a horizontal squeezing and pushing effect on the inclined plane inside the through groove 81. At the same time, due to the limiting effect of the limiting groove inside the setting valve core 2 on the driven plate 8, the two opposite driven plates 8 will gradually slide horizontally towards each other and compress the second spring 9. At the same time, the driven plate 8 will drive the corresponding connecting plate 41 and the rubber seal 4 to retract into the corresponding sliding cavity 21, releasing the pressing and sealing effect of the rubber seal 4 in the setting area. And when the lower piston disc 5 rises to a certain extent, under the continuous action of the water pressure in the liquid inlet pipeline system, the whole setting valve core 2 will be pushed up and compress the compensation spring in the compensation mechanism 3, so that the water in the liquid inlet pipeline system can smoothly pass through the opened setting area and enter the liquid outlet pipeline system. At this time, all the equally angled and misaligned rubber seals 4 are retracted into the setting valve core 2 to reduce the erosion effect of the long-term water flow on the edge of the rubber seal 4, which plays a further protective role for the rubber seal 4; When the water pressure in the liquid inlet pipeline system is less than the sum of the water pressure in the liquid outlet pipeline system and the valve flap reset force, at this time, under the reset action of the first spring 22, the gravity of the setting valve core 2, and the water pressure in the liquid outlet pipeline system, the setting valve core 2 will quickly fall back to its original position and achieve ring sealing again. Since the water pressure in the liquid inlet pipeline system decreases, while the water pressure in the liquid outlet pipeline system still exists and the setting valve core 2 closes the setting area and stops water from flowing out, at this time, a reverse pressure difference is generated between the liquid inlet pipeline system and the liquid outlet pipeline system on both sides of the setting valve core 2, that is, the water pressure in the liquid inlet pipeline system will be less than the water pressure in the liquid outlet pipeline system. At this time, since the upper piston disc 6 is exposed in the liquid outlet pipeline system and the lower piston disc 5 is exposed in the liquid inlet pipeline system, a pressure difference will appear between the upper piston disc 6 and the lower piston disc 5, and the pressure difference will force the upper piston disc 6, the balance plate 7, and the lower piston disc 5 to fall vertically. When the balance plate 7 falls vertically, since the width of the hypotenuse corresponding to the balance plate 7 and the through groove 81 gradually becomes narrower, at this time, under the reset and expansion action of the second spring 9, the inclined plane of the through groove 81 will still maintain the posture of fitting the hypotenuse of the balance plate 7 and make the corresponding two driven plates 8 slide horizontally away from each other along the limit groove. The gradually expanding driven plates 8 will further pressurize and seal the rubber seal 4 located in the setting area through the connecting plate 41, and utilize the pressure difference between the liquid outlet pipeline system and the liquid inlet pipeline system to achieve further pressurization and sealing of the setting valve core 2 and the setting area of the valve body 1, and high tightness can be achieved in a small pipeline pressure system without increasing the reset force of the setting valve core 2; At the same time, a compensation mechanism 3 is additionally provided at the upper end of the elastic connection between the valve body 1 and the setting valve core 2. When the compensation spring works repeatedly and shows fatigue wear after the long-term use of this check valve, or when the pressure of the entire pipeline system needs to be increased or decreased due to system pressure adjustment, at this time, the pressure compensation plate can be made to fall vertically along the cavity groove by rotating the threaded adjustment knob and compress the compensation spring arranged between the upper end of the setting valve core 2, so as to increase the downward pressure of the compensation spring on the setting valve core 2, thereby increasing the reset force of the setting valve core 2 to make up for the loss of elastic force of the compensation spring due to fatigue wear, and at the same time, it can also meet the adjustment of the reset force of the setting valve core 2 required for system pressure adjustment, ensuring that the setting valve core 2 can always maintain the quick reset reaction at the initial installation.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-sealing quick-resetting check valve, comprising a valve body (1), characterized in that: It also includes a setting valve core (2) that is seated and fitted with the conical annular inner wall of the valve body (1), a rubber seal body (4) that is arranged at equal angular displacements on the side wall of the setting valve core (2) for enhancing sealing, and a balance adjustment assembly that is arranged in the central cavity of the setting valve core (2) for comparing the water pressures on both sides of the setting valve core (2) and adaptively switching between the pressed sealing and retracted unsealing states of the rubber seal body (4). The rubber seal body (4) is connected to the balance adjustment assembly through a driven plate (8).

2. The high-sealing and quick-resetting check valve according to claim 1, wherein: A compensation mechanism (3) for adjusting the setting force of the setting valve core (2) is arranged between the T-shaped upper end of the setting valve core (2) and the valve body (1); A cavity groove that is slidably fitted with the T-shaped upper end of the setting valve core (2) is opened at the upper end of the valve body (1).

3. The high-sealing and quick-resetting check valve according to claim 2, characterized in that: The compensation mechanism (3) includes a pressure compensation plate that is slidably fitted with the cavity groove and a compensation spring that is arranged between the pressure compensation plate and the T-shaped upper end of the setting valve core (2); The compensation mechanism (3) further includes a threaded adjustment knob that is rotatably connected to the pressure compensation plate and is threadedly penetrated and connected to the upper end of the valve body (1).

4. A highly sealed and quickly reset check valve according to claim 1, characterized in that: The fitting area between the conical annular inner wall of the valve body (1) and the setting valve core (2) is the setting area; The rubber seal bodies (4) arranged at equal angular displacements achieve annular sealing of the setting area; The rubber seal body (4) is an arc-shaped body.

5. The high-sealing and quick-resetting check valve according to claim 1, wherein: Sliding cavities (21) are opened at equal angular displacements on the side wall of the setting valve core (2) corresponding to the rubber seal body (4); A connecting plate (41) is fixed to the inner surface of the rubber seal body (4) that is slidably arranged inside the sliding cavity (21), and the connecting plate (41) is fixedly connected to the end of the driven plate (8); A limiting groove for the horizontal sliding of the driven plate (8) is opened inside the setting valve core (2); A second spring (9) is fixed between two of the driven plates (8) that face each other in pairs.

6. The high-sealing quick-resetting check valve according to claim 1, characterized in that: A chute that is penetrated and connected to the valve body (1) is opened inside the T-shaped upper end of the setting valve core (2); The balance adjustment assembly includes a lower piston disc (5) that is hermetically slidably arranged in the central cavity of the setting valve core (2), an upper piston disc (6) that is slidably arranged inside the chute, and a balance plate (7) that is fixedly arranged at equal angles between the lower piston disc (5) and the upper piston disc (6); It further includes a first spring (22) that is arranged inside the chute for providing a supporting force.

7. The high-sealing quick-resetting check valve according to claim 6, characterized in that: The upper end of the first spring (22) is fixed to the inner wall of the chute, and the other end of the first spring (22) is fixed to the upper surface of the upper piston disc (6).

8. A highly-sealed and quickly reset check valve according to claim 6, characterized in that: The balance plate (7) is arranged corresponding to the driven plate (8), and the balance plate (7) is composed of an upper vertical plate and a lower inclined panel; A vertical groove for the lifting and sliding of the upper vertical plate is opened inside the setting valve core (2); A through groove (81) for the penetration of the lower inclined panel is opened at the end of the driven plate (8).

9. The high-sealing and quick-resetting check valve according to claim 8, characterized in that: The lower inclined panel is provided with an inclined side, and the width of the lower inclined panel increases from top to bottom; One side of the through groove (81) is set as an inclined surface that is fitted and matched with the inclined side of the balance plate (7); And a space for adapting to the width change during the lifting of the lower inclined panel is reserved on the other side opposite to the inclined surface of the through groove (81).

Images