Rotary starting type check valve

Abstract

The utility model discloses a rotary starting type check valve, and relates to the technical field of valve structures. The check valve comprises a valve body, a valve inner cavity, an inlet channel and an outlet channel are formed in the valve body. A valve seat is fixed to the inner wall of the valve inner cavity. A communicating cavity penetrates through the side face of the valve seat. Two mounting plates are symmetrically fixed on the surface of the valve seat; a pin hole penetrates through the side surface of the mounting plate; a pin shaft is rotationally arranged between the inner walls of the two pin holes; rocker arms are fixed on the peripheral side surfaces of the pin shafts; mounting grooves penetrate through the side surfaces of the rocker arms; mounting columns are slidably arranged on the inner walls of the mounting grooves; valve clacks are fixed at one ends of the mounting columns; large gaskets are slidably arranged on the peripheral side faces of the mounting columns. The valve clack is externally installed on the rocker arm, then the rocker arm is installed on the valve seat, and then the valve clack and the valve seat are integrally installed in the valve inner cavity, so that the positions of the valve seat and the valve clack are conveniently controlled, and a gap is prevented from being formed between the valve seat and the valve clack when the valve seat and the valve clack are covered.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve structures, and particularly relates to a rotary start check valve. Background Art

[0002] A check valve refers to a valve whose closing member is a circular valve flap and which uses its own weight and the pressure of the medium to block the reverse flow of the medium. It belongs to the category of automatic valves and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. Check valves are commonly used as bottom valves for pumping devices to prevent the backflow of water.

[0003] Currently, check valves usually include lift check valves and swing check valves. The valve flap is installed on a lift arm or a swing arm. The lift check valve realizes the opening and closing of the passage by controlling the lifting of the lift arm, and the swing check valve realizes the opening and closing of the passage by controlling the rotation of the swing arm. Most of the valve flaps of existing swing check valves are installed on the valve seat, and then the valve seat is assembled according to the position of the valve flap. However, this method is not conducive to controlling the assembly between the valve flap and the valve seat. If there is a deviation in the position, it may also cause the valve seat and the valve flap to not be sealed and closed.

[0004] Therefore, we provide a rotary start check valve to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a rotary start check valve. By installing the valve flap on the rocker arm externally, then installing the rocker arm on the valve seat, and then installing the valve flap and the valve seat as a whole into the valve cavity, it is convenient to control the positions of the valve seat and the valve flap, prevent there from being a gap between the valve seat and the valve flap when they are closed, and solve the problem that the existing swing check valve is not conducive to controlling the assembly between the valve flap and the valve seat, and if there is a deviation in the position, it may also cause the valve seat and the valve flap to not be sealed and closed.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] The utility model relates to a rotary start check valve, which comprises a valve body. A valve inner cavity, an inlet passage and an outlet passage are formed inside the valve body. The two sides of the valve inner cavity are respectively communicated with the inlet passage and the outlet passage. The inlet passage and the outlet passage both penetrate through the valve body. A valve seat is fixed on the inner wall of the valve inner cavity. A communication cavity is formed through the side surface of the valve seat. The two sides of the communication cavity are respectively communicated with the inlet passage and the valve inner cavity. Two mounting plates are symmetrically fixed on the surface of the valve seat. A pin hole is formed through the side surface of the mounting plate. A pin shaft is rotatably arranged between the inner walls of the two pin holes. A rocker arm is fixed on the circumferential side surface of the pin shaft. The rocker arm is located inside the valve inner cavity. An installation groove is formed through the side surface of the rocker arm. An installation column which is attached to the inner wall of the installation groove is slidably arranged inside the installation groove. A valve flap is fixed at one end of the installation column. A large gasket is slidably arranged on the circumferential side surface of the installation column.

[0008] The utility model is further provided that a threaded groove is formed at the other end of the installation column. A screw is rotatably arranged inside the threaded groove in a threaded manner. A first nut is rotatably arranged on the circumferential side surface of the screw in a threaded manner. Limiting grooves are formed through the circumferential side surfaces of the screw and the first nut. A steel wire is arranged inside the limiting groove.

[0009] The utility model is further provided that the valve flap is close to the inlet passage. The first nut is close to the outlet passage. The large gasket is located between the rocker arm and the first nut. One side of the large gasket is closely attached to the rocker arm, and the other side thereof is closely attached to the first nut.

[0010] The utility model is further provided that a first annular sealing gasket is fixed on one side of the valve seat close to the inlet passage. A first annular sealing groove adapted to the first annular sealing gasket is formed inside the inner wall of the inlet passage.

[0011] The utility model is further provided that a second annular sealing gasket is fixed on the side of the valve seat away from the inlet passage. When the valve flap is close to the inlet passage, the valve flap is closely attached to the second annular sealing gasket to close the inlet passage. When the valve flap is away from the inlet passage, the valve flap is separated from the second annular sealing gasket to open the inlet passage.

[0012] The utility model is further provided that the valve inner cavity penetrates through the surface of the valve body. A sealing plate is fixed on the surface of the valve body. Two stud bolts are symmetrically rotatably matched with the surface of the sealing plate in a threaded manner. A second nut is rotatably matched with the circumferential side surface of the stud bolt in a threaded manner. The stud bolt extends into the valve body. The valve body and the sealing plate are fixedly connected through the stud bolt and the second nut.

[0013] The utility model is further provided that a second annular sealing groove is formed on the surface of the valve body. A third annular sealing gasket is fixed on the bottom surface of the sealing plate. The third annular sealing gasket is inserted and matched with the second annular sealing groove. A lifting eye bolt is fixed on the surface of the sealing plate.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the valve flap is fixed on the mounting post. When assembling the valve seat and the valve flap, first fix the mounting post on the inner wall of the mounting groove through screws, the first nut and steel wires externally, then install the whole rocker arm between the two mounting plates, so that the valve flap is rotatably installed on the valve seat, and then install the whole valve seat and the valve flap into the valve cavity. Installing externally is convenient for controlling the positions of the valve seat and the valve flap, and preventing gaps between the valve seat and the valve flap when they are closed.

[0016] 2. By setting the first annular gasket, the second annular gasket and the third annular gasket, the utility model improves the fitting strength between various components, and further improves the sealing performance of the device.

[0017] Certainly, when implementing any product of the utility model, it is not necessarily required to achieve all the above-mentioned advantages simultaneously. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of a rotary start check valve.

[0020] Figure 2 It is a schematic structural diagram of the valve flap in the open state of the utility model.

[0021] Figure 3 It is a schematic structural diagram of the valve seat of the utility model.

[0022] Figure 4 It is a schematic structural diagram of the valve flap of the utility model.

[0023] Figure 5 It is a schematic structural diagram of the rocker arm of the utility model.

[0024] In the drawings, the list of components represented by each reference numeral is as follows:

[0025] 1 - Valve body, 2 - Valve inner cavity, 3 - Inlet passage, 4 - Outlet passage, 5 - Valve seat, 6 - Connecting cavity, 7 - Mounting plate, 8 - Pin hole, 9 - Pin shaft, 10 - Rocker arm, 11 - Mounting groove, 12 - Mounting post, 13 - Valve flap, 14 - Large gasket, 15 - Screw, 16 - First nut, 17 - Limiting groove, 18 - Steel wire, 19 - First annular sealing gasket, 20 - First annular sealing groove, 21 - Second annular sealing gasket, 22 - Sealing plate, 23 - Stud, 24 - Second nut, 25 - Second annular sealing groove, 26 - Third annular sealing gasket, 27 - Lifting ring screw. Detailed implementation mode

[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 of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] For the first specific embodiment, please refer to Figures 1-5 , the present invention is a rotary start check valve, including a valve body 1; a valve inner cavity 2, an inlet passage 3 and an outlet passage 4 are opened inside the valve body 1; both sides of the valve inner cavity 2 are respectively communicated with the inlet passage 3 and the outlet passage 4; both the inlet passage 3 and the outlet passage 4 penetrate through the valve body 1; a valve seat 5 is fixed on the inner wall of the valve inner cavity 2; a connecting cavity 6 is penetrated and opened on the side surface of the valve seat 5; both sides of the connecting cavity 6 are respectively communicated with the inlet passage 3 and the valve inner cavity 2; two mounting plates 7 are symmetrically fixed on the surface of the valve seat 5; a pin hole 8 is penetrated and opened on the side surface of the mounting plate 7; a pin shaft 9 is rotatably arranged between the inner walls of the two pin holes 8; a rocker arm 10 is fixed on the circumferential side surface of the pin shaft 9; the rocker arm 10 is located inside the valve inner cavity 2; a mounting groove 11 is penetrated and opened on the side surface of the rocker arm 10; a mounting post 12 that fits with its inner wall is slidably arranged on the inner wall of the mounting groove 11; one end of the mounting post 12 is fixed with a valve flap 13; a large gasket 14 is slidably arranged on the circumferential side surface of the mounting post 12.

[0028] Specifically, a threaded groove is opened at the other end of the mounting post 12; a screw 15 is threadedly rotated on the inner wall of the threaded groove; a first nut 16 is threadedly rotated on the circumferential side surface of the screw 15; limiting grooves 17 are penetrated and opened on the circumferential side surfaces of both the screw 15 and the first nut 16; a steel wire 18 is arranged on the inner wall of the limiting groove 17.

[0029] Furthermore, the valve flap 13 is close to the inlet passage 3; the first nut 16 is close to the outlet passage 4; the large gasket 14 is located between the rocker arm 10 and the first nut 16; one side of the large gasket 14 is in close contact with the rocker arm 10, and the other side is in close contact with the first nut 16.

[0030] The operation process of this embodiment is as follows: First, install the valve seat and valve flap externally. When installing the rocker arm 10, first pass the installation column 12 through the installation groove 11, sleeved the large gasket 14 on the circumferential side of the installation column 12, then thread-rotate the first nut 16 on the circumferential side of the screw 15, then turn the screw 15 into the threaded groove inside the end of the installation column 12, and then rotate the first nut 16 so that the first nut 16 slides in the direction close to the rocker arm 10 and finally presses tightly against the large gasket 14, pressing the large gasket 14 tightly between the rocker arm 10 and the first nut 16. Then pass the steel wire 18 through the limit groove 17 to limit the first nut 16, thus completing the installation between the valve flap 13 and the rocker arm 10. Then install the pin shaft 9 into the pin hole 8 so that the rocker arm 10 is installed between the two mounting plates 7. Then install the valve seat 5 and the valve flap 13 as a whole into the valve inner cavity 2.

[0031] When working normally, rotate the pin shaft 9 counterclockwise to drive the rocker arm 10 to rotate, so that the rocker arm 10 drives the valve flap 13 to move in the direction away from the communication cavity 6, thus opening the communication cavity 6, and then making the inlet passage 3, the communication cavity 6, the valve inner cavity 2 and the outlet passage 4 communicate with each other. At this time, normal flow can occur. By controlling the rotation angle of the pin shaft 9, the opening and closing degree of the communication cavity 6 can be controlled, and thus the water flow rate can be controlled.

[0032] When flow stoppage is required, rotate the pin shaft 9 clockwise to drive the rocker arm 10 to rotate, so that the rocker arm 10 drives the valve flap 13 to move in the direction close to the communication cavity 6, and then slowly press tightly against the valve seat 5 to close the communication cavity 6.

[0033] For specific embodiment two, please refer to Figures 1-5 , on the basis of specific embodiment one, a first annular sealing gasket 19 is fixed on one side of the valve seat 5 close to the inlet passage 3; a first annular sealing groove 20 adapted to the first annular sealing gasket 19 is provided on the inner wall of the inlet passage 3.

[0034] Specifically, a second annular sealing gasket 21 is fixed on one side of the valve seat 5 away from the inlet passage 3; when the valve flap 13 approaches the inlet passage 3, the valve flap 13 closely adheres to the second annular sealing gasket 21 to close the inlet passage 3; when the valve flap 13 is away from the inlet passage 3, the valve flap 13 separates from the second annular sealing gasket 21 to open the inlet passage 3.

[0035] Furthermore, the valve inner cavity 2 penetrates through the surface of the valve body 1; a sealing plate 22 is fixed on the surface of the valve body 1; two stud bolts 23 are symmetrically thread-rotatably matched on the surface of the sealing plate 22; the circumferential side of the stud bolt 23 is thread-rotatably matched with a second nut 24; the stud bolt 23 extends into the valve body 1; the valve body 1 and the sealing plate 22 are fixedly connected by the stud bolt 23 and the second nut 24.

[0036] Further, a second annular sealing groove 25 is formed on the surface of the valve body 1; a third annular sealing gasket 26 is fixed to the bottom surface of the sealing plate 22; the third annular sealing gasket 26 is inserted and fitted with the second annular sealing groove 25; a lifting eye bolt 27 is fixed to the surface of the sealing plate 22.

[0037] The operation process of this embodiment is as follows: When installing the valve seat 5, align the first annular sealing gasket 19 on the valve seat 5 with the first annular sealing groove 20 on the inlet passage 3 to improve the sealing performance between the valve seat 5 and the inlet passage 3. When installing the sealing plate 22, align the third annular sealing gasket 26 on the bottom surface of the sealing plate 22 with the second annular sealing groove 25 on the surface of the valve body 1, and connect the sealing plate 22 and the valve body 1 together through the stud 23 and the second nut 24. When stopping the flow, the valve flap 13 abuts against the second annular sealing gasket 21 on the valve seat 5 to improve the sealing performance between the valve flap 13 and the valve seat 5 and enhance the effect of stopping the flow.

[0038] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the present utility model disclosed above are only used to help explain the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present utility model, so that those skilled in the art in the relevant technical field can understand and utilize the present utility model well. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A rotary start-up check valve, comprising a valve body (1); characterized in that: A valve inner cavity (2), an inlet passage (3) and an outlet passage (4) are formed inside the valve body (1); both sides of the valve inner cavity (2) are respectively communicated with the inlet passage (3) and the outlet passage (4); the inlet passage (3) and the outlet passage (4) both penetrate through the valve body (1); A valve seat (5) is fixed on the inner wall of the valve inner cavity (2); a communication cavity (6) is formed through the side surface of the valve seat (5); both sides of the communication cavity (6) are respectively communicated with the inlet passage (3) and the valve inner cavity (2); Two mounting plates (7) are symmetrically fixed on the surface of the valve seat (5); a pin hole (8) is formed through the side surface of the mounting plate (7); a pin shaft (9) is rotatably arranged between the inner walls of the two pin holes (8); a rocker arm (10) is fixed on the circumferential surface of the pin shaft (9); the rocker arm (10) is located inside the valve inner cavity (2); A mounting groove (11) is formed through the side surface of the rocker arm (10); a mounting post (12) that fits with its inner wall is slidably arranged on the inner wall of the mounting groove (11); a valve flap (13) is fixed at one end of the mounting post (12); a large gasket (14) is slidably arranged on the circumferential surface of the mounting post (12).

2. The rotary start-up check valve according to claim 1, characterized in that A threaded groove is formed at the other end of the mounting post (12); a screw (15) is rotatably arranged in the threaded groove of the inner wall; a first nut (16) is rotatably arranged on the circumferential surface of the screw (15); limiting grooves (17) are formed through the circumferential surfaces of the screw (15) and the first nut (16); a steel wire (18) is arranged on the inner wall of the limiting groove (17).

3. The rotary start-up check valve according to claim 2, characterized in that The valve flap (13) is close to the inlet passage (3); the first nut (16) is close to the outlet passage (4); the large gasket (14) is located between the rocker arm (10) and the first nut (16); one side of the large gasket (14) is in close contact with the rocker arm (10), and the other side of it is in close contact with the first nut (16).

4. The rotary start-up check valve according to claim 3, characterized in that A first annular sealing gasket (19) is fixed on one side of the valve seat (5) close to the inlet passage (3); a first annular sealing groove (20) adapted to the first annular sealing gasket (19) is formed in the inner wall of the inlet passage (3).

5. The rotary start-up check valve according to claim 4, characterized in that A second annular sealing gasket (21) is fixed on the side of the valve seat (5) away from the inlet passage (3); when the valve flap (13) is close to the inlet passage (3), the valve flap (13) is in close contact with the second annular sealing gasket (21) to close the inlet passage (3); when the valve flap (13) is away from the inlet passage (3), the valve flap (13) is separated from the second annular sealing gasket (21) to open the inlet passage (3).

6. The rotary start-up check valve according to claim 5, characterized in that The valve inner cavity (2) penetrates through the surface of the valve body (1); a sealing plate (22) is fixed on the surface of the valve body (1); two stud bolts (23) are symmetrically threadedly rotatably engaged on the surface of the sealing plate (22); a second nut (24) is threadedly rotatably engaged on the circumferential side surface of the stud bolt (23); the stud bolt (23) extends into the valve body (1); the valve body (1) and the sealing plate (22) are fixedly connected by the stud bolt (23) and the second nut (24).

7. The rotary start check valve according to claim 6, characterized in that a second annular sealing groove (25) is formed on the surface of the valve body (1); a third annular sealing gasket (26) is fixed on the bottom surface of the sealing plate (22); the third annular sealing gasket (26) is inserted and engaged with the second annular sealing groove (25); a lifting eye screw (27) is fixed on the surface of the sealing plate (22).

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