Hydropower station valve plate type water filling and pressure balancing device

Abstract

The utility model discloses a hydropower station valve plate type water filling and pressure balancing device which comprises a valve body, a valve rod, a balance seat and a water filling valve frame. The valve body is arranged on the gate, an inlet and an outlet of the valve body are located on the two sides of the gate in the water flow direction respectively, the valve plate is arranged in the valve body in a sliding mode in the vertical direction, the lower end of the valve rod is connected with the valve plate, the upper end of the valve rod is connected with the balance seat, the balance seat is arranged on the gate in a sliding mode in the vertical direction, and the water filling valve frame is connected with the balance seat in a sliding mode in the vertical direction. The problem that the valve plate loosens upwards and leaks water under the action of water pressure can be effectively avoided, and the sealing performance is guaranteed; and meanwhile, the valve plate and the valve rod can be prevented from inclining in the moving process.

Description

Technical Field

[0001] This application relates to the technical field of flat pressure valves, and particularly to a valve plate type water filling and pressure equalizing device for a hydropower station. Background Art

[0002] In water conservancy and hydropower projects, for gates that are opened and closed under static water, in order to reduce the capacity of the gate hoist of the hydropower station and ensure that the gate is lifted without water pressure, a water filling and pressure equalizing device needs to be arranged on the gate body, or it is borne by a pressure equalizing bypass pipe and a control valve buried in the gate pier of the hydraulic structure to connect the front and back of the gate for water filling behind the gate. The purpose is to lift the gate under the condition that the water pressures upstream and downstream of the gate are equal.

[0003] The patent document with the publication number CN110762227A discloses a pressure - opening type pressure equalizing valve device, which includes a pressure equalizing valve, a connecting rod connected to the pressure equalizing valve, a lever hinged at one end to the connecting rod, a bottom - section gate pressure rod hinged at the other end of the lever and vertically arranged, and a combined pressure rod in contact with the bottom - section gate pressure rod. When performing pressure equalization, through the combined action of the connecting rod, the lever, and the bottom - section gate pressure rod, the pressure equalizing valve can be opened and closed, thus achieving pressure equalization, which has certain positive significance. However, it also has certain deficiencies. For example, when the pressure equalizing valve is opened and closed in a lever - type manner, even if there is a certain sliding hinge amount between the connecting rod and the lever, or there is a hinge setting between the pressure equalizing valve and the connecting rod, there will still be a non - vertical acting force during a certain period of the operation process of the pressure equalizing valve during opening and closing, resulting in the inclination of the pressure equalizing valve during startup or sealing, affecting the final sealing effect of the pressure equalizing valve. And with frequent use, it will also cause certain wear to the pressure equalizing valve, affecting its service life. Utility Model Content

[0004] The purpose of this application is to solve the above problems and provide a valve plate type water filling and pressure equalizing device for a hydropower station.

[0005] To achieve the above purpose, the technical solution of this application is as follows:

[0006] A valve plate type water filling and pressure equalizing device for a hydropower station includes a valve body, a valve rod, a balance seat, and a water filling valve frame; the valve body is arranged on the gate, the inlet and outlet of the valve body are respectively located on both sides of the gate along the water flow direction, a valve plate is slidably arranged inside the valve body in the vertical direction, the lower end of the valve rod is connected to the valve plate, the upper end of the valve rod is connected to the balance seat, the balance seat is slidably arranged on the gate in the vertical direction, and the water filling valve frame is slidably connected to the balance seat in the vertical direction.

[0007] Preferably, the gate is provided with two first strip-shaped sliding grooves which are arranged at intervals; the balance seat includes a first bottom wall and two first side walls arranged at intervals, and mounting holes are provided on both of the two first side walls, and a guiding suspension shaft is inserted through the mounting holes, and two ends of the guiding suspension shaft are respectively and slidably arranged in the two first strip-shaped sliding grooves.

[0008] Preferably, the water filling valve frame includes a second bottom wall and two second side walls arranged at intervals, and second strip-shaped sliding grooves are provided on both of the two second side walls, and the guiding suspension shaft passes through the second strip-shaped sliding grooves and is slidably matched with the second strip-shaped sliding grooves; the balance seat is located between the two second side walls.

[0009] Preferably, a first connection hole is provided on the first bottom wall, and adjusting nuts are screwed on the parts of the valve stem on both sides of the first bottom wall; a second connection hole is provided on the second bottom wall for the valve stem to pass through.

[0010] Preferably, a valve seat is further included, a channel is provided inside the valve seat, and two end faces of the valve seat are respectively connected to the gate and the inlet of the valve body.

[0011] Preferably, a guiding seat is provided on the gate, a guiding hole is provided on the guiding seat, the valve stem is sleeved in the guiding hole and is slidably matched with the guiding hole; the guiding seat is located between the balance seat and the valve body.

[0012] Preferably, a sliding groove is provided inside the valve body, a sliding strip is correspondingly provided on the side of the valve plate, and the sliding strip is correspondingly and slidably arranged in the sliding groove.

[0013] In a valve plate type water filling and pressure equalizing device for a hydropower station disclosed in the present application, a balance seat is provided at the top of the valve stem, and the balance seat is connected to the valve plate through the valve stem and simultaneously transmits the acting force along the length direction of the valve stem. Therefore, under the action of the self-gravity of the balance seat, the gravity of the whole formed by the valve plate, the valve stem and the balance seat can better ensure the smoothness of the movement of the valve plate and the valve stem in the vertical direction, that is, only ensure that the valve plate has vertical movement, avoid the sealing failure of the valve body caused by the inclination of the valve plate due to the action of water pressure, and also under the action of the self-gravity of the balance seat, the problem of water leakage caused by the upward loosening of the valve plate under the action of water pressure can be effectively avoided, ensuring the sealing performance; at the same time, the inclination of the valve plate and the valve stem during the movement can also be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present application;

[0015] Figure 2 is Figure 1 a partial enlarged view at A in

[0016] Figure 3 This is a cross-sectional view of the overall structure of this application along the water flow direction;

[0017] Figure 4 This is a cross-sectional view of the overall structure of this application perpendicular to the water flow direction;

[0018] Figure 5 is Figure 4 the partial enlarged view at position B in

[0019] In the figure:

[0020] 1. Valve body; 10. Inlet; 11. Outlet; 2. Valve plate; 3. Balance seat; 30. First side wall; 31. First bottom wall; 4. Water filling valve frame; 40. Second side wall; 41. Second bottom wall; 42. Second strip-shaped sliding groove; 43. Hanging hole; 5. Gate; 50. Valve seat; 51. Channel; 52. First strip-shaped sliding groove; 6. Guide hanging shaft; 7. Valve rod; 70. Adjusting nut; 8. Guide seat. Detailed implementation manners

[0021] Now, the present application will be further described in detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, which only illustrate the basic structure of the present application in a schematic manner, so they only show the components related to the present application.

[0022] As Figures 1-5 shown, a water filling and pressure equalizing device with a valve plate 2 type for a hydropower station includes a valve body 1, a valve rod 7, a balance seat 3 and a water filling valve frame 4; the valve body 1 is arranged on the gate 5, the inlet 10 and the outlet 11 of the valve body 1 are respectively located on both sides of the gate 5 along the water flow direction, the valve plate 2 is slidably arranged inside the valve body 1 in the vertical direction, the lower end of the valve rod 7 is connected to the valve plate 2, the upper end of the valve rod 7 is connected to the balance seat 3, the balance seat 3 is slidably arranged on the gate 5 in the vertical direction, and the water filling valve frame 4 is slidably connected to the balance seat 3 in the vertical direction.

[0023] Specifically, the lower end of the valve rod 7 can be connected to the valve plate 2 by means of threaded connection.

[0024] When the valve rod 7 moves upward, the valve plate 2 moves upward synchronously, and the inlet 10 and the outlet 11 of the valve body 1 are communicated; when the valve rod 7 moves downward, the valve plate 2 moves downward synchronously, and the inlet 10 and the outlet 11 of the valve body 1 are blocked by the valve plate 2.

[0025] The balance seat 3 is connected to the top of the valve rod 7, and at the same time, the balance seat 3 is slidably connected to the gate 5 in the vertical (up and down) direction.

[0026] The water filling valve frame 4 is slidably arranged relative to the balance seat 3 in the vertical (up and down) direction. Exemplarily, the water filling valve frame 4 is used to control the opening and closing of the valve plate 2 and the entire gate 5. Specifically, when the water filling valve frame 4 rises, the water filling valve frame 4 drives the balance seat 3 to move upward. At this time, the valve is in the open state, and the inlet 10 and the outlet 11 of the valve body 1 are interconnected, and the water filling and pressure equalizing process proceeds normally. After the pressure equalizing is completed, the water filling valve frame 4 continues to rise, thereby further driving the entire gate 5 to rise to realize opening the gate.

[0027] In the present application, a balance seat 3 is provided at the top of the valve stem 7. The balance seat 3 is connected to the valve plate 2 through the valve stem 7 and simultaneously transmits the acting force along the length direction of the valve stem 7. Therefore, under the action of the self-gravity of the balance seat 3, the gravity of the whole formed by the valve plate 2, the valve stem 7 and the balance seat 3 can better ensure the smoothness of the movement of the valve plate 2 and the valve stem 7 in the vertical direction, that is, only ensure that the valve plate 2 has vertical movement, and avoid the sealing failure of the valve body 1 caused by the inclination of the valve plate 2 due to the action of water pressure. Similarly, under the action of the self-gravity of the balance seat 3, the problem of the valve plate 2 loosening upward and leaking water under the action of water pressure can be effectively avoided, and the sealing performance is ensured; at the same time, the inclination of the valve plate 2 and the valve stem 7 during the movement can also be avoided.

[0028] In some further embodiments, two first strip-shaped chutes 52 are provided on the gate 5. The number of the first strip-shaped chutes 52 is two, and the two first strip-shaped chutes 52 are arranged at intervals; the balance seat 3 includes a first bottom wall 31 and two spaced first side walls 30. Mounting holes are provided on both of the two first side walls 30, and a guiding suspension shaft 6 is inserted through the mounting holes. The two ends of the guiding suspension shaft 6 are respectively slidably arranged in the two first strip-shaped chutes 52.

[0029] Two first strip-shaped chutes 52 are arranged at intervals on the gate 5, and the length direction of the first strip-shaped chutes 52, that is, the corresponding sliding direction, is arranged in the up and down direction.

[0030] The balance seat 3 is integrally in a U-shaped structure. Its two first side walls 30 are arranged at intervals, and the direction of the interval is the same as the direction of the interval between the two first strip-shaped chutes 52. A set of opposite side edges of the first bottom wall 31 are respectively connected to the bottoms of the two first side walls 30.

[0031] Mounting holes are provided on the first side wall 30, and a guiding suspension shaft 6 is inserted through the mounting holes. The two ends of the guiding suspension shaft 6 are respectively slidably arranged in the two first strip-shaped chutes 52. Through the guiding suspension shaft 6 and the first strip-shaped chutes 52, the balance seat 3 realizes the sliding connection with the gate 5.

[0032] For the convenience of description, it is defined that the direction of the water flow passing through the inlet 10 and the outlet 11 of the valve body 1 is the front and back direction, and the direction of the interval between the two first strip-shaped chutes 52 and the two first side walls 30 is the left and right direction.

[0033] It should be noted that in addition to being slidably connected to the first strip-shaped chute 52, the end of the guiding hanging shaft 6 can also rotate at a certain angle relative to the first strip-shaped chute 52. Therefore, when the valve stem 7 may be inclined, during the lifting process of the guiding hanging shaft 6, it will adaptively correct the inclination of the valve stem 7, so that the valve stem 7 is always in a vertically upward lifting state.

[0034] In some further embodiments, the water filling valve frame 4 includes a second bottom wall 41 and two second side walls 40 arranged at intervals. Second strip-shaped chutes 42 are provided on both second side walls 40, and the guiding hanging shaft 6 passes through the second strip-shaped chutes 42 and is slidably engaged with the second strip-shaped chutes 42; the balance seat 3 is located between the two second side walls 40.

[0035] Exemplarily, the water filling valve frame 4 includes two second side walls 40 arranged at intervals, and also includes a second bottom wall 41. Among them, the two second side walls 40 are arranged at intervals in the left-right direction, and the left and right two side edges of the second bottom wall 41 are respectively connected to the bottoms of the two second side walls 40. Structurally, it can be in a U-shaped structure, and the overall size of the entire water filling valve frame 4 is larger than the overall size of the balance seat 3, so that the balance seat 3 is entirely located inside the water filling valve frame 4.

[0036] In addition, a hanging hole 43 is provided on a relatively upper section of the second side wall 40 of the water filling valve frame 4, and a second strip-shaped chute 42 is provided on a relatively lower section. The guiding hanging shaft 6 is arranged through the second strip-shaped chute 42. When the water filling valve frame 4 rises, the lower part of the second strip-shaped chute 42 abuts against the guiding hanging shaft 6, synchronously driving the guiding hanging shaft 6 and the balance seat 3 to rise.

[0037] During the rising process, the water filling valve frame 4 rises, and the bottom of the second strip-shaped chute 42 in the water filling valve frame 4 contacts the guiding hanging shaft 6. When continuing to rise, under the action of the second strip-shaped chute 42, the guiding hanging shaft 6 rises, and the valve plate 2 rises synchronously during this process. When the water filling valve frame 4 drives the guiding hanging shaft 6 to rise to the top of the first strip-shaped chute 52, the opening of the valve plate 2 is the largest, that is, the maximum water filling position; when the water filling valve frame 4 continues to rise, the guiding hanging shaft 6 will interact with the top of the first strip-shaped chute 52, thereby lifting the entire gate 5 to rise, realizing the gate opening operation after pressure equalization.

[0038] It can be conceived that to a certain extent, the first strip-shaped chute 52 is equivalent to the lifting lug of the entire gate 5.

[0039] Adopting the structural design of staged lifting can make the structures of the lifting valve plate 2 and the gate 5 in the entire device interconnected, avoiding the need to additionally set up the lifting structure of the gate 5, thereby reducing the number of components of the device and further simplifying the structure of the entire device.

[0040] In addition, the existence of the second strip-shaped sliding groove 42 can ensure that the water filling valve frame 4 is as much as possible inside the entire gate 5 when it is not hoisted, avoiding excessive upward protrusion and affecting other processes.

[0041] In some further embodiments, a first connection hole is provided on the first bottom wall 31, and adjusting nuts 70 are screwed on the portions of the valve stem 7 on both sides of the first bottom wall 31; a second connection hole is provided on the second bottom wall 41 for the valve stem 7 to pass through.

[0042] The top of the valve stem 7 sequentially passes through the second connection hole and the first connection hole, and adjusting nuts 70 are screwed on the upper and lower sides of the first bottom wall 31 to adjust the up and down position of the valve stem 7 relative to the balance seat 3.

[0043] In some further embodiments, a valve seat 50 is further included. A channel 51 is provided inside the valve seat 50, and two end faces of the valve seat 50 are respectively connected to the gate 5 and the inlet 10 of the valve body 1.

[0044] The valve body 1 is specifically arranged on the gate 5 through the valve seat 50. A channel 51 is provided inside the valve seat 50. One end of the channel 51 is connected to the inlet 10 of the valve body 1, and the other end communicates with the water-facing side of the gate 5. The water flow during equalizing pressure can enter the inside of the valve body 1 through the channel 51.

[0045] In some further embodiments, a guide seat 8 is provided on the gate 5. A guide hole is provided on the guide seat 8, and the valve stem 7 is sleeved in the guide hole and is in sliding fit with the guide hole; the guide seat 8 is located between the balance seat 3 and the valve body 1.

[0046] The guide seat 8 is mainly used to ensure the stability of the valve stem 7 during the up and down movement, so that the valve stem 7 can only move in the vertical direction.

[0047] In some further embodiments, a sliding groove is provided inside the valve body 1, and a sliding strip is correspondingly provided on the side of the valve plate 2, and the sliding strip is correspondingly slidably arranged in the sliding groove.

[0048] In order to ensure the stability of the valve plate 2 during the sliding process, a sliding groove is provided inside the valve body 1. Correspondingly, a sliding strip is provided on the edge of the valve plate 2, and the sliding strip is in sliding fit with the sliding groove, thereby limiting the valve plate 2 to only slide in the sliding direction, avoiding the valve plate 2 from tilting, and ensuring the stability and sealing performance of the movement of the valve plate 2.

[0049] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A valve plate type water leveling device for a hydropower station, characterized in that: The invention comprises a valve body (1), a valve stem (7), a balancing seat (3) and a water filling valve frame (4); the valve body (1) is arranged on a gate (5); an inlet (10) and an outlet (11) of the valve body (1) are respectively located on both sides of the gate (5) along the water flow direction; a valve plate (2) is provided inside the valve body (1) for sliding in a vertical direction; the lower end of the valve stem (7) is connected to the valve plate (2); the upper end of the valve stem (7) is connected to the balancing seat (3); the balancing seat (3) is slidably arranged on the gate (5) in a vertical direction; and the water filling valve frame (4) is slidably connected to the balancing seat (3) in a vertical direction.

2. The valve plate type water filling and pressure relief device of a hydropower station according to claim 1, characterized in that: The gate (5) is provided with a first strip-shaped slide groove (52), the number of the first strip-shaped slide grooves (52) is two, and the two first strip-shaped slide grooves (52) are arranged at intervals; the balancing seat (3) comprises a first bottom wall (31) and two first side walls (30) arranged at intervals, the two first side walls (30) are both provided with mounting holes, a guide hanging shaft (6) is passed through the mounting hole, and the two ends of the guide hanging shaft (6) are respectively slidably arranged in the two first strip-shaped slide grooves (52).

3. The valve plate type water filling and pressure relief device of a hydropower station according to claim 2, characterized in that: The water filling valve frame (4) comprises a second bottom wall (41) and two second side walls (40) arranged at intervals, the two second side walls (40) are each provided with a second strip-shaped slide groove (42), the guide suspension shaft (6) passes through the second strip-shaped slide groove (42) and is slidably matched with the second strip-shaped slide groove (42); the balance seat (3) is located between the two second side walls (40).

4. The valve plate type water filling and pressure relief device of a hydropower station according to claim 3, characterized in that: The first bottom wall (31) is provided with a first connecting hole, and portions of the valve stem (7) located on both sides of the first bottom wall (31) are threadedly connected with adjusting nuts (70); the second bottom wall (41) is provided with a second connecting hole for the valve stem (7) to pass through.

5. The valve plate type water filling and pressure relief device of a hydropower station according to claim 1, characterized in that: It also comprises a valve seat (50), wherein a channel (51) is provided inside the valve seat (50), and two end surfaces of the valve seat (50) are respectively connected to the gate (5) and the inlet (10) of the valve body (1).

6. The valve plate type water filling and pressure relief device of a hydropower station according to claim 1, characterized in that: The gate (5) is provided with a guide seat (8), the guide seat (8) is provided with a guide hole, the valve stem (7) is sleeved in the guide hole and slidably cooperates with the guide hole; the guide seat (8) is located between the balance seat (3) and the valve body (1).

7. The valve plate type water filling and pressure relief device of a hydropower station according to claim 1, characterized in that: The valve body (1) is provided with a sliding groove inside, and a sliding bar is correspondingly provided on the side of the valve plate (2), and the sliding bar is slidably arranged in the sliding groove.

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