Sand blocking type corrugated pipe expansion joint for hydropower station

Abstract

The utility model discloses a sand blocking type corrugated pipe expansion joint for a hydropower station, which relates to the field of expansion joints and comprises a sand blocking chamber, a corrugated pipe expansion joint A is fixedly arranged on one side of the sand blocking chamber, and a corrugated pipe expansion joint B is fixedly arranged on the other side of the sand blocking chamber. Fixing frames are fixedly arranged on one side of the corrugated pipe expansion joint A and one side of the corrugated pipe expansion joint B, limiting mechanisms are movably arranged on the two sides of each fixing frame, a transverse rod is fixedly arranged at one end of each limiting mechanism, and a sealing mechanism is fixedly arranged on one side of each fixing frame. Through the arrangement of the sand blocking chamber and the sand blocking filter plate, when a water source flows into the sand blocking chamber through the corrugated pipe expansion joint, the sand blocking filter plate filters sand and stones doped in the water source and deposits the sand and stones in the sand blocking chamber, and personnel observe the amount of the sand and stones in the sand blocking chamber through the observation window and regularly open the sealing plate to clean the sand and stones in the sand blocking chamber; therefore, the effect of filtering sand and stones in a water source is achieved, and pipeline blockage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to a sand-blocking bellows expansion joint for a hydropower station. Background Art

[0002] A hydropower station is composed of a hydraulic system, a mechanical system, and an electric energy generating device. It is a water conservancy hub project that realizes the conversion of water energy into electric energy. The sustainability of electric energy production requires the uninterrupted use of water energy in a hydropower station. In the pipelines of the hydraulic system of a hydropower station, a bellows expansion joint is often installed. The expansion joint can play a telescopic role mainly by relying on the bellows. The function and strength design of the bellows are mainly the design of the bellows. Different designs and combinations of the bellows can make the bellows stretch, compress or bend, thereby forming three basic forms of bellows expansion joints: axial, transverse, and angular. As an elastic compensation element that can be freely extended and retracted, the expansion joint has the advantages of reliable operation, good performance, and compact structure. It has been widely used in chemical, metallurgical, hydropower station and other departments. The water source of a hydropower station is often mixed with sand and gravel, which can easily cause pipe blockage when it circulates in the pipe, affecting normal use.

[0003] The traditional bellows expansion joints used in hydropower stations do not have the function of filtering and cleaning the sand and gravel in the water source. The water source will be mixed with sand and gravel, which will cause blockage after sedimentation and accumulation in the pipes, affecting the circulation of the water body and the normal operation of the hydropower station.

[0004] Therefore, it is necessary to invent a sand-blocking bellows expansion joint for a hydropower station to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a sand-blocking bellows expansion joint for a hydropower station, so as to solve the problem that the above-mentioned background technology does not have the function of filtering and cleaning the sand and gravel in the water source, the water source may be mixed with sand and gravel, and after precipitation and accumulation in the pipeline, it may cause blockage, affect the circulation of the water body, and affect the normal operation of the hydropower station.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sand-blocking bellows expansion joint for a hydropower station, comprising a sand-blocking chamber, a bellows expansion joint A is fixedly arranged on one side of the sand-blocking chamber, a bellows expansion joint B is fixedly arranged on the other side of the sand-blocking chamber, a fixing frame is fixedly arranged on one side of the bellows expansion joint A and the bellows expansion joint B, a limiting mechanism is movably arranged on both sides of the fixing frame, a cross bar is fixedly arranged on one end of the limiting mechanism, a sealing mechanism is fixedly arranged on one side of the fixing frame, a sand-blocking filter plate is fixedly installed on the top surface of the sand-blocking chamber, an inner sleeve is fixedly arranged inside the bellows expansion joint A and the bellows expansion joint B, and a cover mechanism is movably arranged on the bottom of one side of the sand-blocking chamber.

[0007] Preferably, the limiting mechanism comprises a threaded rod movably arranged on both sides of the fixing frame, both sides of the surface of the threaded rod are threadedly connected with limiting nuts, and the limiting nuts are installed on both sides of the threaded rod for limiting when the fixing frame moves.

[0008] Preferably, movable holes are fixedly provided on both sides of the surface of the fixing frame, and the movable holes are adapted to the threaded rod, so that the movable holes facilitate the movement of the threaded rod.

[0009] Preferably, the sealing mechanism comprises a threaded tube fixedly arranged on one side of the fixing frame, the surface of the threaded tube is sleeved with a sealing rubber ring, and the sealing rubber ring is sleeved on the surface of the threaded tube to seal the connection between the expansion joint and the external connecting pipe.

[0010] Preferably, the cover mechanism comprises a closing plate movably arranged at the bottom of one side of the sand blocking chamber, a sealing gasket is sleeved on one side of the closing plate, and an observation window is fixedly arranged on the surface of the closing plate, and the observation window facilitates observation of the sand blocking amount inside the sand blocking chamber.

[0011] Preferably, mounting screw holes are fixedly provided around the surface of the closing plate, and mounting bolts are movably provided inside the mounting screw holes, so that the mounting bolts facilitate the mounting of the closing plate on the sand blocking chamber.

[0012] Preferably, the number of the fixing frames and the sealing mechanisms are both two groups, and the two groups of the fixing frames and the sealing mechanisms are symmetrically arranged, so that the sealing mechanisms facilitate the sealing of the external pipeline connection.

[0013] Technical effects and advantages of the utility model:

[0014] 1. Through the setting of the sand blocking chamber and the sand blocking filter plate, when the water source flows into the sand blocking chamber through the bellows expansion joint, the sand blocking filter plate filters the sand and gravel mixed in the water source and settles it in the sand blocking chamber. The personnel observe the amount of sand and gravel inside the sand blocking chamber through the observation window, open the closing plate regularly, and clean the sand and gravel inside the sand blocking chamber, thereby achieving the effect of filtering the sand and gravel in the water source and avoiding pipeline blockage.

[0015] 2. Through the setting of the sealing mechanism, the sealing rubber ring is put on the threaded pipe, and then the threaded pipe is connected to the external pipe. The sealing rubber ring seals the connection between the threaded pipe and the external pipe to prevent leakage from affecting the circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The utility model is a schematic diagram of the overall structure of a sand-blocking bellows expansion joint for a hydropower station.

[0018] Figure 2 The utility model is a schematic structural diagram of a sand-blocking filter plate and a cover plate mechanism of a sand-blocking bellows expansion joint for a hydropower station.

[0019] Figure 3 The utility model is a structural schematic diagram of a sealing mechanism of a sand-blocking bellows expansion joint for a hydropower station.

[0020] Figure 4 The utility model is a schematic structural diagram of a limiting mechanism of a sand-blocking bellows expansion joint for a hydropower station.

[0021] In the figure: 1. sand blocking chamber; 2. bellows expansion joint A; 3. bellows expansion joint B; 4. fixing frame; 5. limiting mechanism; 501. threaded rod; 502. limiting nut; 6. cross bar; 7. mounting bolt; 8. sealing mechanism; 801. threaded pipe; 802. sealing rubber ring; 9. sand blocking filter plate; 10. inner casing; 11. cover plate mechanism; 1101. closing plate; 1102. sealing gasket; 1103. observation window. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] The utility model provides Figure 1-4A sand-blocking bellows expansion joint for a hydropower station is shown, comprising a sand-blocking chamber 1, a bellows expansion joint A 2 being fixedly arranged on one side of the sand-blocking chamber 1, a bellows expansion joint B 3 being fixedly arranged on the other side of the sand-blocking chamber 1, a fixing frame 4 being fixedly arranged on one side of the bellows expansion joint A 2 and the bellows expansion joint B 3, a limiting mechanism 5 being movably arranged on both sides of the fixing frame 4, a cross bar 6 being fixedly arranged on one end of the limiting mechanism 5, a sealing mechanism 8 being fixedly arranged on one side of the fixing frame 4, a sealing rubber ring 802 being sleeved on a threaded pipe 801 through the setting of the sealing mechanism 8, and then the threaded pipe 801 being connected to an external pipe, and the sealing rubber ring 802 sealingly seals the connection between the threaded pipe 801 and the external pipe Seal to prevent leakage from affecting circulation. A sand-blocking filter plate 9 is fixedly installed on the top surface of the sand-blocking chamber 1. Through the arrangement of the sand-blocking chamber 1 and the sand-blocking filter plate 9, when the water source flows into the sand-blocking chamber 1 through the bellows expansion joint, the sand-blocking filter plate 9 filters the sand and gravel mixed in the water source and settles them in the sand-blocking chamber 1. The personnel observe the amount of sand and gravel inside the sand-blocking chamber 1 through the observation window 1103, and regularly open the closing plate 1101 to clean the sand and gravel inside the sand-blocking chamber 1, thereby achieving the effect of filtering the sand and gravel in the water source and avoiding pipe blockage. The interiors of the A bellows expansion joint 2 and the B bellows expansion joint 3 are both fixedly provided with inner sleeves 10, and a cover mechanism 11 is movably provided at the bottom of one side of the sand-blocking chamber 1.

[0024] The limiting mechanism 5 includes threaded rods 501 movably arranged on both sides of the fixing frame 4, and both sides of the surface of the threaded rods 501 are threadedly connected with limiting nuts 502. Through the setting of the limiting mechanism 5, the two groups of limiting nuts 502 are screwed to adjust their positions on the surface of the threaded rods 501. The fixing frame 4 moves under the drive of the bellows expansion joint to move, and the limiting nuts 502 limit the fixing frame 4.

[0025] Both sides of the surface of the fixing frame 4 are fixedly provided with movable holes, which are adapted to the threaded rod 501 . The setting of the movable holes facilitates the movement of the threaded rod 501 .

[0026] The sealing mechanism 8 includes a threaded tube 801 fixedly arranged on one side of the fixing frame 4, and a sealing rubber ring 802 is sleeved on the surface of the threaded tube 801. Through the setting of the sealing mechanism 8, the sealing rubber ring 802 is sleeved on the threaded tube 801, and then the threaded tube 801 is connected to the external pipeline. The sealing rubber ring 802 seals the connection between the threaded tube 801 and the external pipeline to prevent leakage from affecting the circulation.

[0027] The cover mechanism 11 includes a closing plate 1101 movably arranged at the bottom of one side of the sand blocking chamber 1, a sealing gasket 1102 is sleeved on one side of the closing plate 1101, and an observation window 1103 is fixedly arranged on the surface of the closing plate 1101. Through the setting of the cover mechanism 11, when the water source flows into the sand blocking chamber 1 through the bellows expansion joint, the sand blocking filter plate 9 filters the sand and gravel mixed in the water source and settles it in the sand blocking chamber 1. The personnel observe the amount of sand and gravel inside the sand blocking chamber 1 through the observation window 1103, and regularly open the closing plate 1101 to clean the sand and gravel inside the sand blocking chamber 1, thereby achieving the effect of filtering the sand and gravel in the water source and avoiding pipeline blockage.

[0028] The surface of the closing plate 1101 is fixedly provided with mounting screw holes all around, and mounting bolts 7 are movably provided inside the mounting screw holes. The installation of the mounting bolts 7 can play a role in installing the closing plate 1101 on the sand blocking chamber 1.

[0029] There are two sets of fixing frames 4 and sealing mechanisms 8 , and the two sets of fixing frames 4 and sealing mechanisms 8 are symmetrically arranged. The arrangement of the sealing mechanisms 8 can prevent leakage.

[0030] Working principle: Twist the two sets of limit nuts 502 to adjust their positions on the surface of the threaded rod 501. The fixing frame 4 moves under the drive of the bellows expansion joint. The limit nuts 502 limit the fixing frame 4. Put the sealing rubber ring 802 on the threaded pipe 801, and then connect the threaded pipe 801 to the external pipe. The sealing rubber ring 802 seals the connection between the threaded pipe 801 and the external pipe to avoid leakage affecting the circulation. When the water source flows into the sand blocking chamber 1 through the bellows expansion joint, the sand blocking filter plate 9 filters the sand and gravel mixed in the water source and settles it in the sand blocking chamber 1. The personnel observe the amount of sand and gravel inside the sand blocking chamber 1 through the observation window 1103, and regularly open the closing plate 1101 to clean the sand and gravel inside the sand blocking chamber 1, and filter the sand and gravel in the water source to avoid clogging of the pipeline.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sand-blocking bellows expansion joint for a hydropower station, comprising a sand-blocking chamber (1), characterized in that: A bellows expansion joint (2) is fixedly provided on one side of the sand blocking chamber (1), a bellows expansion joint (3) is fixedly provided on the other side of the sand blocking chamber (1), a fixing frame (4) is fixedly provided on one side of each of the bellows expansion joints (2) and the bellows expansion joints (3), a limiting mechanism (5) is movably provided on both sides of the fixing frame (4), a cross bar (6) is fixedly provided on one end of the limiting mechanism (5), a sealing mechanism (8) is fixedly provided on one side of the fixing frame (4), a sand blocking filter plate (9) is fixedly installed on the top surface of the sand blocking chamber (1), an inner sleeve (10) is fixedly provided inside each of the bellows expansion joints (2) and the bellows expansion joints (3), and a cover plate mechanism (11) is movably provided on the bottom of one side of the sand blocking chamber (1).

2. The sand-blocking bellows expansion joint for a hydropower station according to claim 1, characterized in that: The limiting mechanism (5) comprises a threaded rod (501) movably arranged on both sides of the fixing frame (4), and both sides of the surface of the threaded rod (501) are threadedly connected to the limiting nuts (502).

3. The sand-blocking bellows expansion joint for a hydropower station according to claim 2, characterized in that: Both sides of the surface of the fixing frame (4) are fixedly provided with movable holes, and the movable holes are adapted to the threaded rods (501).

4. The sand-blocking bellows expansion joint for a hydropower station according to claim 1, characterized in that: The sealing mechanism (8) comprises a threaded tube (801) fixedly arranged on one side of the fixing frame (4), and a sealing rubber ring (802) is sleeved on the surface of the threaded tube (801).

5. The sand-blocking bellows expansion joint for a hydropower station according to claim 1, characterized in that: The cover plate mechanism (11) comprises a closing plate (1101) movably arranged at the bottom of one side of the sand blocking chamber (1), a sealing gasket (1102) being sleeved on one side of the closing plate (1101), and an observation window (1103) being fixedly arranged on the surface of the closing plate (1101).

6. The sand-blocking bellows expansion joint for a hydropower station according to claim 5, characterized in that: The surface of the closing plate (1101) is fixedly provided with mounting screw holes on all sides, and mounting bolts (7) are movably provided inside the mounting screw holes.

7. The sand-blocking bellows expansion joint for a hydropower station according to claim 1, characterized in that: The number of the fixing frames (4) and the sealing mechanisms (8) is two groups, and the two groups of the fixing frames (4) and the sealing mechanisms (8) are symmetrically arranged.

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