Water turbine water inlet butterfly valve of detachable sealing structure

Abstract

The utility model relates to the technical field of water inlet valves, in particular to a water turbine water inlet butterfly valve with a detachable sealing structure, which comprises a butterfly valve main body, a central shaft rotationally connected with the inner wall of the butterfly valve main body and a valve clack connected with the outer wall of the central shaft, a sealing plate is arranged on the inner side wall of the mounting ring, a sealing ring is arranged on the outer side of the valve clack, a sealing ring is arranged on the outer side of the sealing ring, a reinforcing sealing assembly is arranged between the sealing ring and the sealing plate, and when sealing problems occur, only the mounting ring, the sealing ring or the sealing ring are detached and taken out for targeted overhaul. Maintenance and overhaul of the butterfly valve body are greatly facilitated, the sealing performance when the valve clack is not opened is further improved by reinforcing the sealing assembly, the sealing performance of the sealing portion under the water flow pressure is guaranteed, water flow leakage is avoided, and high efficiency and stability of water turbine operation are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to water inlet valve technical field, concretely relates to a detachable sealing structure's water turbine inlet butterfly valve. BACKGROUND

[0002] Water turbine inlet butterfly valve is the ideal equipment of water conservancy and hydropower station intercepts or connects medium, when the unit sheds load and just meets the failure of the speed regulator and cannot act, the water inlet valve can be closed under the condition of moving water, cuts off the water flow, prevents the time of the overspeed of the unit from exceeding the allowable value, avoids the expansion of the accident, currently, the commonly used water turbine inlet butterfly valve is used in the lower water head of industry and mine, and the sealing is basically rubber sealing, for high water head, due to the larger pressure, currently, ball valve is mostly used to control the water turbine inlet at home and abroad, but the ball valve is larger in size, and the weight is 2-3 times of the butterfly valve of the same level, especially the manufacturing difficulty of large-diameter ball valve is larger, one-time investment is higher, leading to higher product cost.

[0003] The prior art often sets sealing devices on the inner wall of the butterfly valve body, thereby increasing the connection sealing property between the butterfly valve body and the valve disc, but the sealing between the butterfly valve body and the valve disc will age after long-time use of the butterfly valve, leading to the phenomenon of leakage of the butterfly valve even in the closed state, the traditional sealing device is generally integrally connected with the butterfly valve, thus cannot be replaced only from the sealing connection part, the replacement of the sealing device is more inconvenient, leading to the fact that the butterfly valve is also discarded when the sealing device is ineffective, greatly increasing the use cost, thus it is necessary to make improvements. SUMMARY

[0004] The utility model aims at overcoming the prior art's insufficient, and provides a detachable sealing structure's water turbine inlet butterfly valve to solve the above problems.

[0005] The utility model discloses a detachable sealing structure's water turbine inlet butterfly valve, including butterfly valve body, with the inner wall rotation of butterfly valve body The central shaft is connected, and the valve disc is connected with the outer wall of central shaft, both ends of butterfly valve body are provided with a group of installation ring, the inboard wall of installation ring is equipped with sealing plate, the outside of valve disc is equipped with sealing ring, the outside of sealing ring is equipped with sealing ring, and the sealing ring and sealing plate are equipped with the reinforcing seal assembly between.

[0006] Preferably, the reinforcing seal assembly includes a threaded groove and a sliding groove opened in the sealing plate, the threaded groove and the sliding groove are communicated, a matching threaded rod is screwed in the threaded groove, a sliding block is slidingly connected in the sliding groove, the end of the threaded rod abuts one side of the sliding block, the other side of the sliding block is provided with a compression spring, the end of the compression spring is connected with a sealing rod matched with the sliding groove, and the side wall of the sealing rod abuts the side wall of the sealing ring.

[0007] Preferably, the width value of the sealing plate is greater than the width value of the mounting ring, and the side wall of the sealing plate is in abutment with the inner side wall of the butterfly valve body.

[0008] Preferably, the aperture value of the sliding groove is greater than the aperture value of the threaded groove.

[0009] Preferably, the material of the sealing ring is EPDM rubber, and the material of the sealing ring is 316L stainless steel.

[0010] The utility model has the following beneficial effects:

[0011] 1、The detachable sealing structure's water turbine inlet butterfly valve, through the cooperation of butterfly valve body and mounting ring at both ends of butterfly valve body, realize the convenience of detachable installation, avoid the aging of the seal between butterfly valve body and valve flap after long time use of butterfly valve, lead to the phenomenon that even in the closed state, the butterfly valve will leak, when the sealing problem is found, only the mounting ring, sealing ring or sealing ring is taken out for targeted maintenance, greatly facilitate the maintenance and maintenance of butterfly valve body, and the sealing assembly is further improved to improve the sealing performance of the valve flap when it is not opened, ensure the sealing performance of the sealing part under the water pressure, avoid water leakage, and ensure the efficiency and stability of the water turbine operation.

[0012] 2, when using the reinforced sealing assembly, rotate the threaded rod, move the threaded rod along the axial direction through the guiding effect of the threaded groove, the end of the threaded rod directly abuts the sliding block, pushes the sliding block to slide in the sliding groove, the sliding block compresses or releases the compression spring when moving, converts the mechanical force into the elastic force, the elastic force of the compression spring is transmitted to the sealing ring through the sealing rod, and the dynamic compression force is formed;When the sealing ring leaks due to wear or deformation, rotating the threaded rod can adjust the pressure of the sealing rod on the sealing ring, compensate the gap, and the elastic property of the compression spring can absorb the pipeline vibration or water hammer impact, reduce the risk of sealing failure;When the sealing ring has a more serious problem, the sealing ring can be replaced after the reinforced sealing assembly is disassembled, further facilitating the maintenance and maintenance of the butterfly valve body. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art, and obviously, the drawings in the following description are only one embodiment of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0014] Figure 1 It is the whole structure schematic view of the utility model;

[0015] Figure 2 It is the front view of the utility model.

[0016] Figure 3 It is the cooperation structure schematic view of the mounting ring and the sealing plate of the utility model;

[0017] Figure 4 It is the structure schematic view of the reinforced sealing assembly of the utility model;

[0018] The marks in the drawing are:

[0019] 1, butterfly valve main body;2, center shaft;3, valve flap;4, mounting ring;5, sealing plate;6, sealing ring;7, sealing ring;8, reinforced sealing assembly;81, threaded groove;82, sliding groove;83, threaded rod;84, sliding block;85, compression spring;86, sealing rod. Specific implementation

[0020] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the following will make a clear and complete description of the technical scheme in the specific implementation of the utility model, so as to further illustrate the utility model. Obviously, the specific implementation described is only a part of the implementation of the utility model, not all styles.

[0021] The following will be combined with the attached Figures 1-4 The utility model will be further described in detail.

[0022] Example 1:

[0023] A detachable sealing structure's water turbine inlet butterfly valve, including butterfly valve main body 1, with the inner wall rotationally connected center shaft 2 of butterfly valve main body 1 and the outer wall connected valve flap 3 of center shaft 2, both ends of butterfly valve main body 1 can detachably install a group of mounting ring 4, the inner side wall fixedly connected with sealing plate 5 of mounting ring 4, the outer side of valve flap 3 is provided with sealing ring 6, sealing ring 6 outer side is provided with sealing ring 7, sealing ring 7 and sealing plate 5 between installation reinforced sealing assembly 8, through the cooperation of butterfly valve main body 1 and the mounting ring 4 of both ends of butterfly valve main body 1, the convenience of detachable installation is realized, the aging of the seal between butterfly valve main body and valve flap 3 after long-term use of butterfly valve is avoided, which leads to the phenomenon that butterfly valve will leak even in the closed state, when the sealing problem is found, only mounting ring 4, sealing ring 6 or sealing ring 7 is taken out for targeted repair, which greatly facilitates the maintenance and repair of butterfly valve main body 1, and the sealing property of valve flap 3 when not opening is further improved through reinforced sealing assembly 8, the sealing property of sealing part under water pressure is ensured, water leakage is avoided, and the efficiency and stability of water turbine operation are ensured.

[0024] In the embodiment, the reinforced sealing assembly 8 comprises a threaded groove 81 and a sliding groove 82 formed in the sealing plate 5, the threaded groove 81 and the sliding groove 82 are communicated, a matching threaded rod 83 is threadedly connected in the threaded groove 81, a sliding block 84 is slidingly connected in the sliding groove 82, an end of the threaded rod 83 abuts one side of the sliding block 84, the other side of the sliding block 84 is provided with a compression spring 85, an end of the compression spring 85 is connected with a sealing rod 86 matched with the sliding groove 82, a side wall of the sealing rod 86 abuts a side wall of the sealing ring 7, when the reinforced sealing assembly 8 is used, the threaded rod 83 is rotated, the threaded rod 83 moves along the axial direction through the guiding effect of the threaded groove 81, the end of the threaded rod 83 directly abuts the sliding block 84, the sliding block 84 is pushed to slide in the sliding groove 82, the sliding block 84 is compressed or released when moving, the mechanical force is converted into the elastic force, the elastic force of the compression spring 85 is transmitted to the sealing ring 7 through the sealing rod 86, and the dynamic compression force is formed; when the sealing ring 7 leaks due to abrasion or deformation, the threaded rod 83 is rotated to adjust the pressure of the sealing rod 86 on the sealing ring 7, the gap is compensated, the elastic property of the compression spring 85 can absorb the pipeline vibration or water hammer impact, and the risk of sealing failure is reduced; when the sealing ring 7 has a more serious problem, the sealing ring 7 can be replaced after the reinforced sealing assembly 8 is disassembled, and the maintenance and repair of the butterfly valve body 1 are further facilitated.

[0025] In the embodiment, the width value of the sealing plate 5 is greater than the width value of the mounting ring 4, the side wall of the sealing plate 5 abuts the inner side wall of the butterfly valve body 1, the gap between the mounting ring 4 and the valve body is covered by the extended part of the sealing plate 5, the medium is prevented from leaking along the contact surface of the mounting ring 4 and the valve body, and after the width of the sealing plate 5 is increased, the rigidity is further enhanced, the higher fluid impact can be resisted, and the service life is prolonged.

[0026] In the embodiment, the aperture value of the sliding groove 82 is greater than the aperture value of the threaded groove 81, the gap of the sliding groove 82 allows the compression spring 85 to have a slight radial deformation when compressed, the concentrated stress is converted into the uniformly distributed elastic force, and the local overload failure of the sealing rod 86 is avoided.

[0027] In the embodiment, the material of the sealing ring 6 is EPDM rubber, which is suitable for temperature fluctuation under the working condition of the water turbine, such as the alternating use scene of cold water starting and hot water stopping, and the chemical stability is higher than that of ordinary rubber, the material of the sealing ring 7 is 316L stainless steel, the corrosion resistance is higher, and the application range is improved.

[0028] The utility model discloses a detachable sealing structure's water turbine inlet butterfly valve, through butterfly valve main body 1 with the cooperation of the mounting ring 4 of butterfly valve main body 1 both ends, realized the convenience of detachable installation, avoided the aging of the seal between butterfly valve main body and valve clack 3 after long -time use, led to the phenomenon that butterfly valve even in the closed state will appear leakage, when finding that the seal has the problem only mounting ring 4, sealing ring 6 or sealing ring 7 split and take out and carry on the pertinence overhaul, greatly facilitated the maintenance and overhaul of butterfly valve main body 1, and further improve the sealing property when valve clack 3 is not opened through the sealing assembly 8, ensure the airtightness of sealing part under the water flow pressure, avoid the water flow exosmosis, guarantee the high efficiency and stability of water turbine operation, when using sealing assembly 8, rotate threaded rod 83, through the pilot action of screw groove 81, make threaded rod 83 move along the axial direction, the end of threaded rod 83 directly abuts sliding block 84, push sliding block 84 to slide in slide slot 82, sliding block 84 moves and compresses or releases compression spring 85, and mechanical force is converted into elastic force, and the elastic force of compression spring 85 is transmitted to sealing ring 7 through sealing rod 86, and forms dynamic compression force, when sealing ring 7 leaks due to abrasion or deformation, rotate threaded rod 83 can adjust the pressure of sealing rod 86 to sealing ring 7, compensate the gap, and the elastic property of compression spring 85 can absorb pipeline vibration or water hammer impact, reduce the risk of seal failure, when sealing ring 7 has more serious problem, after removing sealing assembly 8, replace sealing ring 7, further facilitate the maintenance and overhaul of butterfly valve main body 1.

[0029] It should be noted that, according to the needs of implementation, each component described in the embodiments of the utility model can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of the utility model. The above embodiments only express several implementation ways of the utility model, and the description is more specific and detailed, but it should not be understood as limiting the scope of the utility model patent. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A detachable sealing structure water turbine inlet butterfly valve, comprising a butterfly valve body (1), a central shaft (2) rotatably connected with the inner wall of the butterfly valve body (1), and a valve disc (3) connected with the outer wall of the central shaft (2), characterized in that: The butterfly valve body (1) is provided with a group of mounting rings (4) at both ends, the inner side wall of the mounting ring (4) is provided with a sealing plate (5), the outer side of the valve disc (3) is provided with a sealing ring (6), the outer side of the sealing ring (6) is provided with a sealing ring (7), and the sealing ring (7) and the sealing plate (5) are provided with a reinforced sealing assembly (8).

2. A detachable sealing structure water turbine inlet butterfly valve according to claim 1, characterized in that: The reinforced sealing assembly (8) comprises a threaded groove (81) and a sliding groove (82) formed in the sealing plate (5), the threaded groove (81) and the sliding groove (82) are communicated, the threaded groove (81) is threadedly connected with a matching threaded rod (83), the sliding groove (82) is slidably connected with a sliding block (84), one side of the threaded rod (83) abuts against one side of the sliding block (84), the other side of the sliding block (84) is provided with a compression spring (85), the end of the compression spring (85) is connected with a sealing rod (86) matched with the sliding groove (82), and the side wall of the sealing rod (86) abuts against the side wall of the sealing ring (7).

3. A detachable sealing structure water turbine inlet butterfly valve according to claim 1, characterized in that: The width value of the sealing plate (5) is greater than the width value of the mounting ring (4), and the side wall of the sealing plate (5) abuts against the inner side wall of the butterfly valve body (1).

4. A detachable sealing structure water turbine inlet butterfly valve according to claim 2, characterized in that: The aperture value of the sliding groove (82) is greater than the aperture value of the threaded groove (81).

5. A detachable sealing structure water turbine inlet butterfly valve according to claim 1, characterized in that: The material of the sealing ring (6) is EPDM rubber, and the material of the sealing ring (7) is 316L stainless steel.

Images