A fast-opening floating inspection gate irrigation and drainage valve

Abstract

The present invention discloses a fast-opening and closing floating inspection gate irrigation and drainage valve, comprising a valve body, a valve plate assembly and a valve stem, wherein the lower end of the valve plate assembly is inserted into the valve body, the upper end of the valve plate assembly is connected to the lower end of the valve stem, and further comprises a lifting mechanism for driving the valve stem to move up and down, wherein the lifting mechanism comprises a first connecting arm, two second connecting arms and two supporting arms, the upper end of the valve stem is connected to the first connecting arm, the two second connecting arms are arranged at the two ends of the first connecting arm and between the two supporting arms, a third connecting arm is hinged on the supporting arm, the second connecting arm is a bending arm and one end is hinged to the first connecting arm, the other end is hinged to one end of the third connecting arm, and the other end of the third connecting arm is connected to an operating handle. The present invention has the advantages of simple structure, good practicality, and convenient for fast opening and closing.

Description

Technical Field

[0001] The invention relates to a floating inspection gate, in particular to a fast-opening and closing floating inspection gate irrigation and drainage valve. Background Art

[0002] The floating inspection gate is one of the main equipment in the ship lock hub project. It is used as a temporary cofferdam for the inspection of ship lock equipment. The filling and drainage valve is configured on the floating inspection gate. During the inspection condition, the floating inspection gate is in place, and the filling and drainage valve is a switch to pour water into the gate body to make the gate body sink; after the inspection condition is completed, the filling and drainage valve is opened to release the water inside the gate body. The filling and drainage valve is also a switch for the water on the outside of the lock chamber to pour water into the lock chamber. At present, most of the filling and drainage valves are in the form of screw rods. The valve body of the filling and drainage valve is located at the bottom of the floating inspection gate. The valve core is subjected to high water pressure. Especially at high head, when the valve is activated by water, the valve core is subjected to large unilateral force, which makes it difficult to open and the opening speed is also slow. In addition, the air humidity in the environment where the filling and drainage valve is located is high, and a part of it needs to be immersed in water, which is prone to rust. If it is not used for a long time, it is more difficult to twist the screw rod to open the valve. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a floating inspection gate irrigation and drainage valve which has a simple structure, good practicality and is easy to open and close quickly.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A fast-opening and closing floating inspection gate irrigation and drainage valve comprises a valve body, a valve plate assembly and a valve stem, wherein the lower end of the valve plate assembly is inserted into the valve body, and the upper end of the valve plate assembly is connected to the lower end of the valve stem. The valve stem also comprises a lifting mechanism for driving the valve stem to move up and down, wherein the lifting mechanism comprises a first connecting arm, two second connecting arms and two supporting arms, the upper end of the valve stem is connected to the first connecting arm, the two second connecting arms are respectively arranged at the two ends of the first connecting arm and between the two supporting arms, a third connecting arm is hinged on the supporting arm, the second connecting arm is a bending arm and one end of the second connecting arm is hinged to the first connecting arm, and the other end is hinged to one end of the third connecting arm, and the other end of the third connecting arm is connected to an operating handle.

[0006] As a further improvement of the above technical solution: a first limiter for limiting the maximum rotation angle of the second connecting arm is connected between the two support arms.

[0007] As a further improvement of the above technical solution: when the second connecting arm contacts the first limiting member, the end of the second connecting arm connected to the first connecting arm is arranged vertically.

[0008] As a further improvement of the above technical solution: the support arm is arranged on a mounting seat, a second limit member for limiting the maximum rising height of the valve plate assembly is provided above the valve plate assembly, a waterproof sleeve is provided on the outer periphery of the valve stem, the upper end of the waterproof sleeve is connected to the mounting seat, and the lower end is connected to the second limit member.

[0009] As a further improvement of the above technical solution: a dustproof sleeve is provided on the mounting seat, a dustproof cover is provided on the dustproof sleeve, the valve stem is inserted into the dustproof sleeve, and a dustproof ring is provided between the valve stem and the dustproof sleeve.

[0010] As a further improvement of the above technical solution: the valve plate assembly includes two valve plates arranged in parallel, two sealing seats are provided on the upper part of the valve body, the two sealing seats are fixedly connected, the two valve plates pass through the two sealing seats one by one, an upper sealing member is provided in the sealing seat, and two sets of upper and lower sealing assemblies are provided in the valve body.

[0011] As a further improvement of the above technical solution: the sealing assembly includes an O-ring and a lip sealing ring arranged on the outer periphery of the O-ring.

[0012] As a further improvement of the above technical solution: horizontally arranged valve interfaces are provided on both sides of the valve body, and a valve support is provided below the valve interface.

[0013] Compared with the prior art, the advantages of the present invention are: the fast-opening floating inspection gate irrigation and drainage valve disclosed in the present invention adopts a lifting mechanism to drive the valve stem and valve plate assembly to lift and lower, so as to realize the opening and closing of the irrigation and drainage valve. The lifting mechanism includes a first connecting arm, a second connecting arm with a bending structure, a support arm, and a third connecting arm. The third connecting arm can be driven by the operating handle to rotate around the hinge shaft on the support arm, and the second connecting arm can be driven by the third connecting arm to rotate and lift, thereby realizing the lifting and lowering of the first connecting arm, the valve stem and the valve plate assembly. It has a simple structure, is easy to operate, and has good practicality. Compared with the switching method of twisting the screw rod, the switching speed is faster and more labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the fast-opening floating inspection gate irrigation and drainage valve of the present invention when it is opened.

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the valve body when the valve body of the present invention is closed.

[0016] Figure 3 It is a schematic diagram of the main structure of the lifting mechanism when the present invention is opened.

[0017] Figure 4 It is a side structural schematic diagram of the lifting mechanism of the present invention when it is closed.

[0018] Figure 5 It is a three-dimensional structural schematic diagram of the lifting mechanism of the present invention when it is closed.

[0019] The numbers in the figure represent: 1. valve body; 11. O-ring; 12. lip seal; 13. valve interface; 14. valve support; 2. valve plate assembly; 21. valve plate; 3. valve stem; 31. waterproof sleeve; 4. lifting mechanism; 41. first connecting arm; 42. second connecting arm; 43. support arm; 44. third connecting arm; 45. operating handle; 46. first limit member; 5. mounting seat; 51. dustproof sleeve; 52. dustproof cover; 53. dustproof ring; 6. second limit member; 7. sealing seat; 71. upper seal. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Figures 1 to 5 An embodiment of a fast-opening floating inspection gate irrigation and drainage valve of the present invention is shown. The fast-opening floating inspection gate irrigation and drainage valve of the present embodiment comprises a valve body 1, a valve plate assembly 2 and a valve stem 3. The lower end of the valve plate assembly 2 is inserted into the valve body 1, and the upper end of the valve plate assembly 2 is connected to the lower end of the valve stem 3. It also comprises a lifting mechanism 4 for driving the valve stem 3 to move up and down. The lifting mechanism 4 comprises a first connecting arm 41, two second connecting arms 42 and two supporting arms 43. The upper end of the valve stem 3 is connected to the first connecting arm 41. The two second connecting arms 42 are respectively arranged at the two ends of the first connecting arm 41 and between the two supporting arms 43. A third connecting arm 44 is hinged on the supporting arm 43. The second connecting arm 42 is a bending arm and one end is hinged to the first connecting arm 41, and the other end is hinged to one end of the third connecting arm 44. The other end of the third connecting arm 44 is connected to an operating handle 45. In the present embodiment, it is a handle, that is, a manual switch is adopted; the second connecting arm 42 preferably adopts an L-shaped structure.

[0022] The fast-opening floating inspection gate irrigation and drainage valve adopts a lifting mechanism 4 to drive the valve stem 3 and the valve plate assembly 2 to rise and fall, so as to realize the opening and closing of the irrigation and drainage valve. The lifting mechanism 4 includes a first connecting arm 41, a second connecting arm 42 with a bending structure, a support arm 43, and a third connecting arm 44. The third connecting arm 44 can be driven by the operating handle 45 to rotate around the hinge axis on the support arm 43, and the third connecting arm 44 drives the second connecting arm 42 to rotate and rise and fall, thereby realizing the lifting and falling of the first connecting arm 41, the valve stem 3 and the valve plate assembly 2. It has a simple structure, is easy to operate, and has good practicality. Compared with the switching method of twisting the screw rod, the switching speed is faster and more labor-saving.

[0023] Furthermore, in this embodiment, a first stopper 46 for limiting the maximum rotation angle of the second connecting arm 42 is connected between the two supporting arms 43. The first stopper 46 may be, for example, a plate, a rod, etc. The first stopper 46 may limit the second connecting arm 42 from continuing to rotate in the maximum opening state of the valve, thereby improving reliability. At the same time, the first stopper 46 connects the two supporting arms 43 into a whole, thereby improving structural strength. As a preferred technical solution, a connecting member may also be provided between the two second connecting arms 42 to connect the two second connecting arms 42 into a whole for reinforcement.

[0024] Furthermore, in this embodiment, when the second connecting arm 42 contacts the first stopper 46, that is, when the valve is at the maximum opening angle, the end of the second connecting arm 42 connected to the first connecting arm 41 is arranged vertically. Due to the effect of gravity in the vertical direction, reverse self-locking can be achieved at this time, preventing the operating handle 45 from rotating in the direction of automatic closing, thereby improving the safety and reliability of the mechanism.

[0025] Furthermore, in this embodiment, the support arm 43 is arranged on a mounting seat 5, and a second stopper 6 for limiting the maximum rising height of the valve plate assembly 2 is arranged above the valve plate assembly 2, that is, the second stopper 6 and the first stopper 46 work together to achieve double stoppering, and the second stopper 6 is preferably a circular plate, and a waterproof sleeve 31 is sleeved on the periphery of the valve stem 3, and the upper end of the waterproof sleeve 31 is connected to the mounting seat 5, and the lower end is connected to the second stopper 6. By arranging the waterproof sleeve 31 on the periphery of the valve stem 3, and the two ends of the waterproof sleeve 31 are respectively connected to the mounting seat 5 and the second stopper 6, water can be effectively isolated, water can be prevented from contacting the valve stem 3 to produce rust, and the service life of the valve stem 3 can be extended.

[0026] Furthermore, in this embodiment, a dustproof sleeve 51 is provided on the mounting seat 5, a dustproof cover 52 is provided on the dustproof sleeve 51, the valve stem 3 is inserted into the dustproof sleeve 51, and a dustproof ring 53 is provided between the valve stem 3 and the dustproof sleeve 51. The dustproof ring 53 can realize dustproof of the upper part of the valve stem 3, and the dustproof sleeve 51, the waterproof sleeve 31, etc. can provide a guide for the lifting and lowering movement of the valve stem 3.

[0027] Furthermore, in this embodiment, the valve plate assembly 2 includes two valve plates 21 arranged in parallel, for example, it can be a double-knife valve structure, two sealing seats 7 are provided on the upper part of the valve body 1, the two sealing seats 7 are fixedly connected, the two valve plates 21 pass through the two sealing seats 7 one by one, and an upper sealing member 71 is provided in the sealing seat 7. The valve body 1 is provided with an upper and lower set of sealing assemblies. As a preferred technical solution, the sealing assembly includes an O-ring 11 and a lip sealing ring 12 arranged on the outer periphery of the O-ring 11. The sealing of the valve plate 21 is achieved by the upper sealing member 71 and the upper and lower sets of sealing assemblies, and the sealing performance is good.

[0028] Furthermore, in the present embodiment, horizontally arranged valve interfaces 13 are provided on both sides of the valve body 1 , a valve support 14 is provided below the valve interface 13 , and the irrigation and drainage valve is fixed at the installation position by the valve support 14 .

[0029] The working principle of the fast-opening floating inspection gate irrigation and drainage valve of the present invention is as follows:

[0030] When the valve is in a closed state, the operating handle 45 is rotated to rotate the third connecting arm 44 around the hinge axis on the support arm 43, and one end of the second connecting arm 42 is driven to rotate around the hinge axis between the second connecting arm 42 and the third connecting arm 44, and the other end is driven to rotate around the hinge axis between the second connecting arm 42 and the first connecting arm 41. Through the rotation of the second connecting arm 42, the first connecting arm 41 and the valve stem 3 are driven to move upward, and the valve stem 3 drives the valve plate assembly 2 to move upward, thereby opening the valve until the valve reaches the maximum opening. When the maximum opening is reached, the first limiter 46 limits the further rotation of the operating handle 45, and the second limiter 6 can also limit the valve plate assembly 2 from continuing to rise, playing a double limiting role. The shape of the second connecting arm 42 is a right-angle L-shaped. When the valve is at the maximum opening, due to the effect of gravity in the vertical direction, it can play a reverse self-locking role to prevent the valve operating handle 45 from rotating in the direction of automatic closing. One end of the third connecting arm 44 is set to an arc-shaped curved structure, which can effectively connect the second connecting arm 42 and strengthen its end.

[0031] Driven by the valve stem 3, the valve plate assembly 2 can be lifted or lowered to open or close the valve. The valve plate assembly 2 is provided with a multiple sealing structure. An upper sealing member 71 is provided inside the sealing seat 7 to prevent leakage from the top of the valve body 1. An O-ring 11 is provided inside the valve body 1, and a lip seal 12 is provided outside the valve body 1 to effectively prevent lateral leakage. The valve interface 13 is connected to the external joint by bolts, and one end of the external joint is outside the floating maintenance gate body, and the other end is inside the floating maintenance gate body. The valve stem 3 is inside the waterproof sleeve 31, which can prevent the valve stem 3 from contacting water and improve the service life of the valve stem 3. The second limiter 6 at the bottom of the valve stem 3, the mounting seat 5 at the top, and the dustproof sleeve 52 all play a guiding role for the valve stem 3.

[0032] When the valve is in the open state, the operating handle 45 is rotated to rotate the third connecting arm 44 around the hinge axis on the support arm 43, and drive one end of the second connecting arm 42 to rotate around the hinge axis between the second connecting arm 42 and the third connecting arm 44, and the other end to rotate around the hinge axis between the second connecting arm 42 and the first connecting arm 41. Through the rotation of the second connecting arm 42, the first connecting arm 41 and the valve stem 3 are driven to move downward, and the valve stem 3 drives the valve plate assembly 2 to move downward, thereby closing the valve.

[0033] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A fast-opening and closing floating inspection gate irrigation and drainage valve, comprising a valve body (1), a valve plate assembly (2) and a valve stem (3), wherein the lower end of the valve plate assembly (2) is inserted into the valve body (1), and the upper end of the valve plate assembly (2) is connected to the lower end of the valve stem (3), characterized in that: It also includes a lifting mechanism (4) for driving the valve stem (3) to move up and down, the lifting mechanism (4) including a first connecting arm (41), two second connecting arms (42) and two supporting arms (43), the upper end of the valve stem (3) is connected to the first connecting arm (41), the two second connecting arms (42) are respectively arranged at the two ends of the first connecting arm (41) and are located between the two supporting arms (43), a third connecting arm (44) is hinged on the supporting arm (43), the second connecting arm (42) is an L-shaped bending arm and one end of the second connecting arm (42) is hinged to the first connecting arm (41), and the other end is hinged to one end of the third connecting arm (44), and the other end of the third connecting arm (44) is connected to an operating handle (45).

2. The fast-opening floating inspection gate irrigation and drainage valve according to claim 1 is characterized in that: A first limiting member (46) for limiting the maximum rotation angle of the second connecting arm (42) is connected between the two supporting arms (43).

3. The fast-opening floating inspection gate irrigation and drainage valve according to claim 2 is characterized in that: When the second connecting arm (42) contacts the first limiting member (46), one end of the second connecting arm (42) connected to the first connecting arm (41) is arranged vertically.

4. The fast-opening floating inspection gate irrigation and drainage valve according to any one of claims 1 to 3, characterized in that: The support arm (43) is arranged on a mounting seat (5), a second limiter (6) for limiting the maximum rising height of the valve plate assembly (2) is arranged above the valve plate assembly (2), a waterproof sleeve (31) is sleeved on the outer periphery of the valve stem (3), the upper end of the waterproof sleeve (31) is connected to the mounting seat (5), and the lower end is connected to the second limiter (6).

5. The fast-opening floating inspection gate irrigation and drainage valve according to claim 4 is characterized in that: A dustproof sleeve (51) is provided on the mounting seat (5), a dustproof cover (52) is provided on the dustproof sleeve (51), the valve stem (3) is inserted into the dustproof sleeve (51), and a dustproof ring (53) is provided between the valve stem (3) and the dustproof sleeve (51).

6. The fast-opening floating inspection gate irrigation and drainage valve according to any one of claims 1 to 3, characterized in that: The valve plate assembly (2) comprises two valve plates (21) arranged in parallel, two sealing seats (7) are provided on the upper part of the valve body (1), the two sealing seats (7) are fixedly connected, the two valve plates (21) pass through the two sealing seats (7) in a one-to-one correspondence, an upper sealing member (71) is provided in the sealing seat (7), and the valve body (1) is provided with two sets of upper and lower sealing assemblies.

7. The fast-opening floating inspection gate irrigation and drainage valve according to claim 6 is characterized in that: The sealing assembly comprises an O-type sealing ring (11) and a lip sealing ring (12) arranged on the outer periphery of the O-type sealing ring (11).

8. The fast-opening floating inspection gate irrigation and drainage valve according to claim 6 is characterized in that: Horizontally arranged valve interfaces (13) are provided on both sides of the valve body (1), and a valve support seat (14) is provided below the valve interface (13).

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