Valve shaft connecting pin shaft and use method thereof

Abstract

A valve shaft connecting pin shaft and the use method thereof, relating to the technical field of power station water inlet ball valve mounting. The valve shaft connecting pin shaft comprises: a valve housing, a valve shaft, a valve and pin shafts. The pin shafts are arranged to pass through the valve shaft; the valve is arranged in the valve housing; the valve housing is provided with a valve shaft mounting hole; a valve shaft mounting recess is provided at a corresponding position of the valve; one end of the valve shaft passes through the mounting hole to be fixed to the mounting recess by means of the pin shafts; the junction of the valve shaft and the valve is provided with grooves at positions corresponding to the pin shafts; with regard to each groove, a part is arranged in the valve shaft while the other part is arranged in the valve, which two parts are combined to form the complete groove; sleeve bodies are provided in the grooves; each sleeve body is in an annular shape and is provided with a pin hole at the central position for a pin shaft to pass through. The valve shaft connecting pin shaft can effectively resist continuously changing pressure and temperature in the valve body, improve apparatus durability, reduce maintenance costs and operation and maintenance investment, and avoid the occurrence of faults.

Description

Valve shaft connecting pin shaft and method of use thereof TECHNICAL FIELD

[0001] The present invention relates to the technical field of power plant intake ball valve installation, specifically to a valve shaft connecting pin shaft and method of use thereof. BACKGROUND

[0002] In the field of fluid machinery, especially in the technical field of water intake ball valve installation of hydropower stations, the design and performance of the valve play a crucial role in the stability and reliability of the entire power production process. The water turbine intake valve is a key component that controls the flow of water into the turbine, and it needs to withstand high-pressure water flow and constantly changing pressure environments. Under such working conditions, the various components of the valve, especially the connection between the valve shaft and the valve, will bear tremendous stress and shear force.

[0003] In the existing technology, the valve shaft is usually connected to the valve body through a circumferential array of pin shafts. This design provides a certain degree of rotational control and structural stability. However, due to large internal pressure changes, the pin shaft connection is prone to wear, especially in high-pressure and variable pressure environments. Over time, this wear can lead to a decline in valve performance and even cause malfunctions, affecting the operational efficiency and safety of the entire hydropower station.

[0004] To solve these problems, the industry has tried various methods to improve the durability and reliability of the pin shaft connection. For example, using more wear-resistant materials, increasing lubrication measures, improving the design of the pin shaft and the slot, etc. However, these methods often have certain limitations, such as increased cost, increased maintenance complexity, or lack of lasting effect.

[0005] Therefore, developing a new type of valve shaft connecting pin shaft that can effectively improve the durability and reliability of the valve without increasing excessive cost and maintenance complexity has become an important demand in the industry. The present invention is proposed based on this background, aiming to solve the shortcomings of the existing technology through innovative design and provide a more effective solution. SUMMARY

[0006] The present invention aims to overcome the shortcomings of the existing technology and provide a valve shaft connecting pin shaft and method of use thereof.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A valve shaft connecting pin shaft, comprising: a valve housing, a valve shaft, a valve, and a pin shaft, the pin shaft being disposed through the valve shaft, the valve being disposed within the valve housing, the valve housing being provided with a valve shaft mounting hole, the valve being provided with a valve shaft mounting slot at a corresponding position, the valve shaft being fixed to the mounting slot through the pin shaft at one end passing through the mounting hole;

[0009] The valve shaft and the valve gate are provided with a slot at the position corresponding to the pin shaft, and the slot is partially provided on the valve shaft and partially provided on the valve gate to form a complete slot.

[0010] The sleeve is annular, and the middle part is provided with a pin hole through which the pin shaft passes.

[0011] Further, the slot is provided in a shape matching the sleeve.

[0012] Further, the inner wall of the slot is provided with a wear-resistant layer.

[0013] Further, the inner diameter of the pin hole matches the outer diameter of the pin shaft.

[0014] Further, the pin shaft is provided in multiple and arranged in a circumferential array on the valve shaft.

[0015] Further, the pin shaft is provided with external threads at both ends, and the mounting groove is provided with corresponding internal threads for fixing the pin shaft.

[0016] Further, the other end of the pin shaft is provided with a fixing nut for fixing the pin shaft to the valve shaft.

[0017] Further, the valve shaft is provided with a fixing ring for fixing the valve shaft to the valve gate.

[0018] Further, a method for connecting the valve shaft with the pin shaft comprises the following steps:

[0019] S1: The wear-resistant layer is cooled to reduce its size, so as to facilitate the installation in the slot, and to ensure that the wear-resistant layer is tightly fixed in the slot without using any adhesive or fixing element;

[0020] S2: The sleeve is placed in the slot of the valve gate provided with the wear-resistant layer;

[0021] S3: The valve shaft and the valve gate are combined to ensure that the slots of the valve shaft and the valve gate are aligned and combined to form a complete slot structure;

[0022] S4: After combination, the sleeve and the wear-resistant layer are arranged in the sleeve;

[0023] S5: The pin shaft is inserted into the valve shaft, rotated and fixed in the mounting groove, and the nut at the other end is tightened;

[0024] S6: The valve shaft is fixed to the valve gate by the fixing ring.

[0025] Further, the wear-resistant layer is provided in a split design matching the slots of the valve body and the valve gate, and after the wear-resistant layer is cooled, it is installed in the slots of the valve body and the valve gate respectively.

[0026] To sum up, by adopting the technical scheme, the application has the beneficial effects of:

[0027] 1. The valve shaft connecting pin shaft design of the application significantly improves the durability of the valve. By setting a slot at the junction of the valve shaft and the valve, combined with the innovative structure of the annular sleeve and the wear-resistant layer, the impact and wear of the pin shaft connection caused by high-pressure water flow and temperature changes are effectively alleviated. This design not only prolongs the service life of the valve, but also reduces the maintenance cost and downtime caused by frequent replacement of parts, thereby reducing the overall operating cost.

[0028] 2. The application enhances the stability and reliability of the valve. The circumferential array arrangement of multiple pin shafts and the precise matching of the pin hole and the outer diameter of the pin shaft ensure the tight connection between the valve shaft and the valve, effectively preventing loosening or falling caused by vibration or pressure fluctuations. At the same time, the design of the fixing ring further strengthens the connection between the valve shaft and the valve housing, making the entire valve system more stable and reliable.

[0029] 3. The valve shaft connecting pin shaft design of the application also has excellent shear resistance. In a high-pressure water flow environment, the pin shaft often bears a large shear force, and the application optimizes the shape, material selection, and installation method of the pin shaft to effectively resist these shear forces, ensuring the normal operation of the valve under extreme working conditions.

[0030] 4. The application also considers the convenience of installation and maintenance. The external thread design at both ends of the pin shaft and the use of the fixing nut make the installation and removal of the pin shaft simple and fast. At the same time, the split design of the wear-resistant layer also facilitates individual replacement when needed, without the need to disassemble the entire valve, greatly saving maintenance time and labor costs.

[0031] 5. The valve shaft connecting pin shaft design of the application also has good adaptability and universality. Its unique structure and connection method are suitable for various types of water turbine inlet valves, whether small or large hydropower stations, and can find its application space. In addition, this design can also be combined with other related technologies to further improve the overall performance and intelligent level of the valve. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a partial structure schematic diagram of the application;

[0033] Figure 2 is a structure schematic diagram of the application;

[0034] Figure 3 is a cross-sectional view of A-A in Figure 2.

[0035] Markings in the figure:

[0036] 1-valve housing, 2-valve shaft, 3-valve, 4-pin shaft, 5-mounting hole, 6-mounting slot, 7-slotted, 8-sleeve, 9-wear-resistant layer, 10-fixing nut, 11-fixing ring. Embodiments of the present application

[0037] The present application will be described in detail below with reference to the accompanying drawings.

[0038] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0039] In this embodiment, as shown in Figures 1 and 2, a valve shaft connecting pin shaft includes: a valve housing 1, a valve shaft 2, a valve 3 and a pin shaft 4, the pin shaft 4 is arranged through the valve shaft 2, the valve 3 is arranged in the valve housing 1, the valve housing 1 is provided with a valve shaft 2 mounting hole 5, the valve 3 is provided with a valve shaft 2 mounting slot 6 at the corresponding position, one end of the valve shaft 2 passes through the mounting hole 5 and is fixed to the mounting slot 6 through the pin shaft 4;

[0040] The valve shaft 2 and the valve 3 meet at the position corresponding to the pin shaft 4, and a slot 7 is provided at the position, part of the slot 7 is arranged on the valve shaft 2 and part of the slot 7 is arranged on the valve 3 to form a complete slot 7, and a sleeve 8 is arranged in the slot 7;

[0041] The sleeve 8 is arranged in a ring shape and has a pin hole in the middle part through which the pin shaft 4 passes.

[0042] In this embodiment, two mounting holes 5 are arranged on both sides of the valve housing 1, the valve 3 is arranged in the valve housing 1, and two mounting slots 6 are arranged at positions corresponding to the mounting holes 5, the valve shaft 2 is inserted into the mounting hole 5, and the end part is located in the mounting slot 6, the sizes of the mounting slot 6 and the mounting hole 5 are matched with the valve shaft 2, and the pin shaft 4 is inserted to fix them;

[0043] At the intersection of the pin shaft 4 insertion and the valve shaft 2 and the valve 3, a slot 7 is arranged, and a sleeve 8 made of reinforcing material is arranged, which effectively disperses the shear force at the connection and prevents the pin shaft 4 from deforming or breaking.

[0044] This design ensures that the sleeve 8 can completely fill the slot 7, forming a tight fit, thereby effectively improving the stability and reliability of the pin shaft 4. This matching shape design reduces the risk of loosening caused by vibration or pressure changes, prolongs the service life of the valve, and reduces maintenance costs.

[0045] Further, a wear-resistant layer 9 is arranged on the inner wall of the slot 7;

[0046] The wear-resistant layer 9 is made of wear-resistant material and is installed in the slot 7 through interference fit to prevent relative friction between the wear-resistant layer 9 and the slot 7 during use, causing damage to the structure of the water valve body. At the same time, there will always be a certain fitting gap between the wear-resistant layer 9 and the sleeve body 8 during installation, so the wear-resistant layer 9 is set to prevent friction damage during long-term operation.

[0047] The introduction of the wear-resistant layer 9 significantly improves the durability of the valve, especially in high-pressure water flow environments, effectively resisting wear and reducing maintenance costs due to frequent component replacement. At the same time, the wear-resistant layer 9 can also prevent failures and improve the operating efficiency and safety of the entire hydropower station.

[0048] Further, the pin hole inner diameter matches the pin shaft 4 outer diameter.

[0049] This precise matching design allows the pin shaft 4 to be more tightly fixed between the valve shaft 2 and the valve 3, effectively preventing loosening or falling out due to high-pressure water flow or pressure changes. This not only improves the stability and reliability of the equipment, but also reduces downtime and maintenance costs due to failures.

[0050] Further, the pin shaft 4 is arranged in a circumferential array on the valve shaft 2.

[0051] The circumferential array of multiple pin shafts 4 enhances the overall structural strength of the valve, allowing it to better withstand pressure and temperature changes from within the valve body. This design improves the durability of the equipment and reduces the risk of damage due to stress concentration.

[0052] Further, the pin shaft 4 is provided with external threads at both ends, and the installation slot 6 is provided with corresponding internal threads for fixing the pin shaft 4.

[0053] This threaded connection allows the pin shaft 4 to be more securely fixed between the valve shaft 2 and the valve 3, effectively preventing loosening due to vibration or pressure fluctuations. At the same time, this design also facilitates installation and removal, improving maintenance efficiency.

[0054] Further, the pin shaft 4 is provided with a fixing nut 10 at the other end for fixing the pin shaft 4 to the valve shaft 2.

[0055] The use of the fixing nut 10 provides additional fixing force for the pin shaft 4, further ensuring the secure connection of the pin shaft 4 between the valve shaft 2 and the valve 3. This design not only improves the stability and reliability of the equipment, but also facilitates the installation and adjustment of the pin shaft 4.

[0056] Further, the valve shaft 2 is provided with a fixing ring 11 for fixing the valve shaft 2 to the valve housing 1.

[0057] The design of the fixed ring 11 provides an additional support point for the valve shaft 2, which is fixed by multiple bolts, making it more stable and fixed in the valve housing 1. This design improves the overall stability and anti-vibration performance of the equipment, ensuring normal operation of the valve under complex working conditions.

[0058] Further, a method for using a valve shaft connecting pin shaft includes the following steps:

[0059] S1: The wear-resistant layer 9 is cooled to reduce its size, making it easier to fit into the slot 7, ensuring that the wear-resistant layer 9 is tightly fixed in the slot 7 without using any adhesive or fixing element;

[0060] S2: The sleeve 8 is placed in the slot 7 of the valve body 3 where the wear-resistant layer 9 is provided;

[0061] S3: The valve shaft 2 and the valve body 3 are combined to ensure that the slot 7 of the valve shaft 2 is aligned and combined with the slot 7 of the valve body 3, forming a complete slot 7 structure;

[0062] S4: After combination, the sleeve 8 and the wear-resistant layer 9 are both provided in the sleeve 8;

[0063] S5: The pin shaft 4 is inserted into the valve shaft 2, rotated and fixed in the mounting groove 6, and the nut at the other end is tightened;

[0064] S6: The valve shaft 2 is fixed to the valve housing 1 by the fixed ring 11.

[0065] This detailed installation procedure ensures the correct installation and efficient use of the pin shaft 4 connecting pin shaft 4. The wear-resistant layer 9 after cooling treatment can tightly fit on the valve shaft 2 and the valve body 3, forming a stable sealing layer. The cooperation of the sleeve 8, fixed nut 10 and fixed ring 11 further ensures the stability and reliability of the pin shaft 4 in the high-pressure water flow environment.

[0066] Further, the wear-resistant layer 9 is designed as a split design that matches the valve body slot 7 and the valve body slot 7. After cooling treatment of the wear-resistant layer 9, it is respectively installed in the valve body slot 7 and the valve body slot 7.

[0067] This split design makes the installation and replacement of the wear-resistant layer 9 more convenient. When the wear-resistant layer 9 needs to be replaced, only the damaged part needs to be replaced, without the need to disassemble the valve as a whole. This greatly saves maintenance time and labor cost, and also improves the maintainability of the equipment.

[0068] The above description is only a preferred embodiment of the invention and is not intended to limit the invention. Any modification, equivalent replacement and improvement made within the spirit and principles of the invention shall be included in the protection scope of the invention.

Claims

1. A valve shaft connecting pin, characterized by: The utility model relates to a valve structure, including: Valve housing (1), valve shaft (2), valve (3) and pin shaft (4), the pin shaft (4) is arranged through valve shaft (2), the valve (3) is arranged in valve housing (1), the valve housing (1) is provided with valve shaft (2) mounting hole (5), the valve (3) is provided with valve shaft (2) installation groove (6) in the corresponding position, one end of valve shaft (2) passes through mounting hole (5) and is fixed in installation groove (6) through pin shaft (4), The valve shaft (2) is provided with a slot (7) corresponding to the position of the pin shaft (4) at the junction with the valve (3), and the slot (7) is partially provided on the valve shaft (2) and partially provided on the valve (3) to form a complete slot (7). The sleeve (8) is annular and has a pin hole in the middle for the pin shaft (4) to pass through.

2. A valve shaft connecting pin shaft as claimed in claim 1, characterized in that: The slot (7) is shaped to match the sleeve (8).

3. A valve shaft connecting pin shaft as defined in claim 1, characterized in that: The inner wall of the slot (7) is provided with a wear-resistant layer (9).

4. A valve shaft connecting pin shaft as defined in claim 1, characterized in that: The inner diameter of the pin hole matches the outer diameter of the pin shaft (4).

5. A valve shaft connecting pin shaft as defined in claim 1, characterized in that: The pin shaft (4) is arranged in a circumferential array on the valve shaft (2).

6. A valve shaft connecting pin shaft as defined in claim 1, characterized in that: Both ends of the pin shaft (4) are provided with external threads, and the installation groove (6) is provided with corresponding internal threads for fixing the pin shaft (4).

7. A valve shaft connecting pin shaft as defined in claim 6, characterized in that: The other end of the pin shaft (4) is provided with a fixing nut (10) for fixing the pin shaft (4) to the valve shaft (2).

8. A valve shaft connecting pin shaft as defined in claim 1, characterized in that: The valve shaft (2) is provided with a fixing ring (11) for fixing the valve shaft (2) to the valve housing (1).

9. A method of using a valve shaft connecting pin, applied to the valve shaft connecting pin according to any one of claims 1-8, characterized in that: The steps include: S1: cooling the wear-resistant layer (9) to reduce its size, so as to facilitate its installation in the slot (7), and to ensure that the wear-resistant layer (9) is tightly fixed in the slot (7) without using any adhesive or fixing element; S2: placing the sleeve (8) in the slot (7) of the valve (3) provided with the wear-resistant layer (9); S3: combining the valve shaft (2) and the valve (3) to ensure that the slots (7) of the valve shaft (2) and the valve (3) are aligned and combined to form a complete slot (7) structure; S4: after combination, the sleeve (8) and the wear-resistant layer (9) are arranged in the sleeve (8); S5: inserting the pin shaft (4) into the valve shaft (2), rotating and fixing it in the installation groove (6), and tightening the nut at the other end; S6: fixing the valve shaft (2) to the valve housing (1) through the fixing ring (11).

10. The method of using a valve shaft connecting pin as defined in claim 9, wherein: In step S1, the wear-resistant layer (9) is designed in a split body that matches the valve body slot (7) and the valve (3) slot (7), and after cooling treatment, the wear-resistant layer (9) is installed in the valve body slot (7) and the valve (3) slot (7) respectively.

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