Hydropower station valve locking mechanism and backflow prevention valve

Abstract

The utility model relates to the technical field of hydropower, in particular to a hydropower station valve locking mechanism and an anti-backflow valve, which comprise a connecting component and a fixing component, the connecting component comprises a valve, a mounting bracket and a fixing seat fixedly mounted on the fixing seat, the mounting bracket is fixedly connected with the valve, and the fixing component is fixedly connected with the valve. Comprising a ratchet wheel, a pawl matched with the ratchet wheel in a clamped mode and an auxiliary part fixedly installed on one side of the ratchet wheel, the ratchet wheel is fixedly installed on a rotating shaft of a valve, the ratchet wheel and the pawl can be installed on a valve fixing base through cooperation between a fixing assembly and a connecting assembly, overall work cannot be affected, and space is saved; and meanwhile, through one-way matching between the pawl and the ratchet wheel, the valve can be locked, and meanwhile the valve can be prevented from being closed when impacted by water flow.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of water and electricity, especially a valve locking mechanism and backflow prevention valve of hydropower station. BACKGROUND

[0002] In the operation process of the hydropower station, the valve is the core equipment for controlling the flow of water, and its stability directly affects the power generation efficiency and equipment safety of the unit. However, in actual operation, due to factors such as water impact, the valve often appears unexpected back closing phenomenon. This back closing not only destroys the stability of the flow of water, leading to fluctuations in power generation efficiency, but also may cause mechanical damage to the valve and related equipment, and even cause serious safety accidents. Therefore, the reliable locking of the valve is a key technical requirement to ensure the safe and stable operation of the hydropower station.

[0003] The common valve locking mechanism in the market generally relies on multi-stage transmission mechanism or hydraulic system, resulting in redundant design, numerous parts, and great difficulty in installation and maintenance. The complex structure is easy to fail due to wear or failure of parts, especially in high-frequency operation or strong water impact working conditions, the locking function is difficult to be durable and stable. At the same time, the precise parts need to be replaced or adjusted regularly, which increases the operation and maintenance cost, and the technical requirements for the operators are high.

[0004] In the prior art, although some locking mechanisms try to improve stability by adding auxiliary mechanisms (such as electromagnetic braking or hydraulic damping), these schemes often further aggravate the complexity of the structure and the cost, and it is difficult to meet the dual needs of economy and practicality of the hydropower station. Therefore, there is an urgent need for a valve locking mechanism with simple structure, high reliability and easy maintenance to solve the problem of valve back closing and adapt to the harsh requirements of diversified working conditions of the hydropower station.

[0005] The present patent proposes a device based on the principle of one-way locking of ratchet and pawl to solve the above technical defects, aiming to realize reliable locking of the valve through simplified mechanical structure, so as to improve the stability and safety of the operation of the hydropower station equipment. SUMMARY

[0006] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part and the abstract of the specification and the utility model name to avoid obscuring the purpose of this part, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0007] In view of the above technical problems that the valve is easy to be back closed by water impact, the utility model is proposed.

[0008] The utility model aims to provide a valve locking mechanism of hydropower station, which aims to solve how to prevent the valve from back closing and lock the valve.

[0009] To solve the above technical problems, the utility model provides the following technical scheme: A water power station valve locking mechanism, it includes connecting assembly, including valve, installation support and the fixed seat of fixed installation on the fixed seat, the installation support with the valve fixed connection;

[0010] Fixed assembly, including ratchet wheel, with the ratchet wheel clasp and fixed installation on the one side of auxiliary part of ratchet wheel, the ratchet wheel is fixedly installed on the pivot of valve.

[0011] As a preferred scheme of the utility model water power station valve locking mechanism, wherein: the fixed seat is provided with telescopic link, the telescopic link includes with the fixed connection of sleeve rod of fixed seat and with the sliding cooperation of movable rod of sleeve rod.

[0012] As a preferred scheme of the utility model water power station valve locking mechanism, wherein: the sleeve rod is further provided with connecting table, and the connecting table is provided with telescopic spring and limiting hole with the fixed connection of pawl.

[0013] As a preferred scheme of the utility model water power station valve locking mechanism, wherein: the ratchet wheel is provided with several pinholes, the pinhole penetrates the ratchet wheel, and forms a through space in the ratchet wheel.

[0014] As a preferred scheme of the utility model water power station valve locking mechanism, wherein: the pawl always keeps the tendency of contact with the ratchet wheel tooth.

[0015] As a preferred scheme of the utility model water power station valve locking mechanism, wherein: the surface layer of pawl with the contact of ratchet wheel is provided with wear-resistant coating.

[0016] As a preferred scheme of the utility model water power station valve locking mechanism, wherein: the auxiliary part includes the locking pin of setting on the one side of ratchet wheel and the electromagnet of with the locking pin reciprocal cooperation;

[0017] The locking pin is embedded with the pinhole.

[0018] As a preferred scheme of the utility model water power station valve locking mechanism, wherein: the one end of locking pin near the electromagnet is provided with magnet;The electromagnet is electrically connected with external circuit.

[0019] As a preferred scheme of the utility model water power station valve locking mechanism, wherein: the size and the number of teeth of ratchet wheel are related to the torque of valve and the required locking accuracy.

[0020] The water power station valve locking mechanism has the beneficial effects that the valve can be locked and the valve can be prevented from being closed when the valve is impacted by water flow.

[0021] Another object of the present utility model is to provide an anti-backflow valve, which aims to solve how to automatically and assistively lock the valve.

[0022] To solve the above technical problems, the present utility model also provides the following technical scheme: an anti-backflow valve, which comprises a water power station valve locking mechanism; and a power-on component, which comprises a control switch for controlling the current flowing through the valve and the electromagnet.

[0023] The anti-backflow valve has the beneficial effect that the valve can be automatically and assistively locked after being powered on. BRIEF DESCRIPTION OF DRAWINGS

[0024] To make the technical solutions of the embodiments of the present utility model clearer, the following will briefly introduce the drawings needed in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the present utility model, and for those skilled in the art, other drawings can be obtained from the drawings without creative labor. Among them:

[0025] Figure 1 The structure diagram in the present utility model.

[0026] Figure 2 The ratchet and pawl cooperation diagram in the present utility model.

[0027] Figure 3 The locking pin movement schematic diagram in the present utility model.

[0028] Figure 4 The control flowchart in the present utility model. DETAILED DESCRIPTION

[0029] To make the above purposes, features and advantages of the present utility model more obvious and easy to understand, the following will make a detailed description of the specific embodiments of the present utility model in combination with the drawings in the specification.

[0030] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present utility model, therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0031] Secondly, the "one embodiment" or "embodiments" referred to herein are intended to mean that a particular feature, structure, or characteristic described in connection with the implementation can be included in at least one implementation of the utility model. The "in one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or mutually exclusive with other embodiments.

[0032] Referring to Figures 1 to 3 For an embodiment of the utility model, the embodiment provides a valve locking mechanism of a hydropower station, which comprises a connecting assembly 1 and a fixing assembly 2. Through cooperation between the fixing assembly 2 and the connecting assembly 1, the ratchet wheel 20 and the pawl 21 can be installed on the valve 10 fixing seat 12, and the overall work will not be affected, space is saved, and through one-way cooperation between the pawl 21 and the ratchet wheel 20, the valve 10 can only move in one direction, and then the valve will not be closed when it is opened.

[0033] Specifically, the connecting assembly 1 comprises the valve 10, the mounting bracket 11, and the fixing seat 12 fixedly installed on the fixing seat 12. The mounting bracket 11 is fixedly connected with the valve 10 and is used for supporting and fixing the valve 10, so as to ensure the stability of the valve 10 in the running process. The fixing seat 12 is fixedly installed on the related equipment of the hydropower station and provides a stable installation basis for the entire locking mechanism.

[0034] Preferably, the fixing assembly 2 comprises the ratchet wheel 20, the pawl 21 in clamping cooperation with the ratchet wheel 20, and the auxiliary part 22 fixedly installed on one side of the ratchet wheel 20. The ratchet wheel 20 is fixedly installed on the rotating shaft 23 of the valve 10.

[0035] Preferably, the fixing seat 12 is provided with an extension rod 12-1. The extension rod 12-1 comprises a sleeve rod 12-1-1 fixedly connected with the fixing seat 12 and a movable rod 12-1-2 in sliding cooperation with the sleeve rod 12-1-1. The length of the extension rod 12-1 can be adjusted according to actual needs, so as to adapt to different installation environments and requirements.

[0036] Preferably, the sleeve rod 12-1-1 is further provided with a connecting table 12-1-3. The connecting table 12-1-3 is provided with an extension spring 12-2 fixedly connected with the pawl 21 and a limiting hole 12-3. When it is necessary to close the valve 10, the staff manually pulls back the pawl 21, so that the pawl 21 is separated from the ratchet wheel 20. Then, the positioning rod is inserted into the limiting hole 12-3, so that the pawl 21 does not affect the closing of the valve 10 when the valve 10 is closed.

[0037] Preferably, the ratchet wheel 20 is provided with a plurality of pin holes 20-1. The pin holes 20-1 penetrate through the ratchet wheel 20 and form a through space in the ratchet wheel 20.

[0038] Preferably, the pawl 21 always maintains the tendency to contact the teeth of the ratchet wheel 20.

[0039] Preferably, the surface layer of the pawl 21 in contact with the ratchet wheel 20 is provided with a wear-resistant coating.

[0040] Preferably, the auxiliary part 22 includes a locking pin 22-1 arranged on one side of the ratchet wheel 20 and an electromagnet 22-2 in reciprocal cooperation with the locking pin 22-1.

[0041] The locking pin 22-1 is embeddedly matched with the pin hole 20-1.

[0042] Preferably, the locking pin 22-1 is provided with a magnet 22-3 at the end close to the electromagnet 22-2.

[0043] The electromagnet 22-2 is electrically connected with external circuit, when it is needed to lock the valve 10, the electromagnet 22-2 is powered to generate a magnetic field, which pushes the locking pin 22-1 to be embedded in the pin hole 20-1 of the ratchet wheel 20, so as to realize the locking of the valve 10. When it is needed to release the locking, the electromagnet 22-2 is powered off, the magnetic field disappears, the locking pin 22-1 is withdrawn from the pin hole 20-1 under the action of the extension spring 12-2, and the valve 10 can be normally operated.

[0044] Preferably, the size and the number of teeth of the ratchet wheel 20 are related to the torque of the valve 10 and the required locking accuracy.

[0045] According to the different torque of the valve 10, the size of the ratchet wheel 20 needs to be adjusted accordingly. For example:

[0046] For the torque of 100 N·m, the diameter of the ratchet wheel 20 can be designed as 100 mm to 150 mm.

[0047] For the torque of 300 N·m, the diameter of the ratchet wheel 20 can be designed as 150 mm to 200 mm.

[0048] For the torque of 500 N·m, the diameter of the ratchet wheel 20 can be designed as 200 mm to 250 mm.

[0049] At the same time, according to the locking accuracy of the valve 10, different tooth density of the ratchet wheel 20 is determined, and the higher the tooth density of the ratchet wheel 20 is, the higher the accuracy is.

[0050] Referring to Figure 4 As another embodiment of the utility model, the embodiment provides a backflow prevention valve, which comprises a power supply assembly 3, the power supply assembly 3 comprises a control switch for controlling the on-off of the current flowing through the valve 10 and the electromagnet 22-2. By controlling the power supply assembly 3, the automatic auxiliary locking and releasing of the valve 10 can be realized, and the stability and safety of the valve 10 in the running process are ensured.

[0051] When the water power station valve locking mechanism is installed, the pawl 21 and the ratchet wheel 20 are in contact during normal operation of the valve 10, ensuring that the valve 10 can only move in one direction, preventing it from closing when impacted by water flow. When the valve 10 needs to be locked, the electromagnet 22-2 is powered to generate a magnetic field, pushing the locking pin 22-1 into the pin hole 20-1 of the ratchet wheel 20, achieving the locking of the valve 10. When the locking needs to be released, the electromagnet 22-2 is powered off, the magnetic field disappears, and the locking pin 22-1 is withdrawn from the pin hole 20-1 under the action of the extension spring 12-2, and the valve 10 can operate normally.

[0052] At the same time, when the valve 10 needs to be closed, the staff manually pulls back the pawl 21, so that the pawl 21 is separated from the ratchet wheel 20, and then the positioning rod is inserted into the limiting hole 12-3, so that when the valve 10 is closed, the pawl 21 will not affect the closing of the valve 10.

[0053] Importantly, it should be noted that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in the application. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Accordingly, all such variations are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be changed or re-sequenced without departing from the scope of the application. Any "means plus function" clauses are intended to cover the structures described herein as performing the recited functions and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the application. Accordingly, the present application is not limited to the particular embodiments described but extends to any embodiments that would perform the same function in the same way to achieve the same results.

[0054] Furthermore, in order to provide a concise description of exemplary embodiments, all features of an actual implementation can not be described (i.e., those unrelated to the best mode of practicing the present application currently being considered).

[0055] It is to be understood that the development of the particular implementations described herein was not determined merely by the availability of certain items or materials. Rather and more generally, specific implementations were developed to provide implementations that are functionally, economically, and / or esthetically practical, in light of ongoing technological changes having economic, business, and / or social consequences.

[0056] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application. They should be covered in the scope of the claims of the present application.

Claims

1. A valve locking mechanism for a hydropower station, characterized in that: include, The connecting assembly (1) includes a valve (10), a mounting bracket (11), and a mounting base (12) fixedly mounted on the mounting base (12), wherein the mounting bracket (11) is fixedly connected to the valve (10); The fixing component (2) includes a ratchet (20), a pawl (21) that engages with the ratchet (20), and an auxiliary component (22) fixedly installed on one side of the ratchet (20). The ratchet (20) is fixedly installed on the rotating shaft (23) of the valve (22).

2. The hydropower station valve locking mechanism as described in claim 1, characterized in that: The fixed base (12) is provided with a telescopic rod (12-1), which includes a sleeve rod (12-1-1) fixedly connected to the fixed base (12) and a movable rod (12-1-2) that slides with the sleeve rod (12-1-1).

3. The hydropower station valve locking mechanism as described in claim 2, characterized in that: The sleeve rod (12-1-1) is also provided with a connecting platform (12-1-3), and the connecting platform (12-1-3) is provided with a telescopic spring (12-2) fixedly connected to the pawl (21) and a limiting hole (12-3).

4. The hydropower station valve locking mechanism as described in claim 3, characterized in that: The ratchet (20) is provided with a plurality of pin holes (20-1), the pin holes (20-1) penetrate the ratchet (20) and form a through space in the ratchet (20).

5. The hydropower station valve locking mechanism as described in claim 4, characterized in that: The pawl (21) always tends to maintain contact with the teeth of the ratchet (20).

6. The hydropower station valve locking mechanism as described in claim 5, characterized in that: The surface of the pawl (21) that contacts the ratchet (20) is provided with a wear-resistant coating.

7. The hydropower station valve locking mechanism as described in claim 6, characterized in that: The auxiliary component (22) includes a locking pin (22-1) disposed on one side of the ratchet (20) and an electromagnet (22-2) mutually exclusive with the locking pin (22-1); The locking pin (22-1) is engaged with the pin hole (20-1).

8. The hydropower station valve locking mechanism as described in claim 7, characterized in that: A magnet (22-3) is provided at one end of the locking pin (22-1) near the electromagnet (22-2); The electromagnet (22-2) is electrically connected to an external circuit.

9. The hydropower station valve locking mechanism as described in claim 8, characterized in that: The size and number of teeth of the ratchet (20) are related to the torque of the valve (10) and the required locking accuracy.

10. A backflow prevention valve, characterized in that: Includes the hydropower station valve locking mechanism as described in any one of claims 1 to 9; and, The energizing component (3) includes controlling the on / off state of the current flowing through the valve (10) and the electromagnet (22-2).

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