Pressure measuring equipment for water turbine nozzle

Abstract

The utility model provides a water turbine nozzle pressure measuring device comprising a test box, two sides of the test box are respectively provided with a handle, a projection box is arranged above the test box, a display is arranged in front of the projection box, a pressing block is arranged above the test box, the pressing block is arranged in front of the projection box, and the display is arranged in front of the projection box. A drainage pipe is installed in front of the test box, a protective cover is installed at the end, away from the test box, of the drainage pipe, a limiting sleeve is installed in front of the test box, four clamping strips are installed in the limiting sleeve, a buffer pipe is installed at the end, located in the test box, of the limiting sleeve, and a pressure sensor is installed on the inner side of the buffer pipe. The pressure sensor is electrically connected with a transmission line, the other end of the transmission line is electrically connected with a data chip of a display, compared with the prior art, the hydraulic turbine nozzle clamping device has the advantages that hydraulic turbine nozzles with different diameters can be conveniently clamped, and the adaptation degree of pressure measuring equipment is improved.

Description

Technical Field

[0001] The utility model relates to a pressure measuring device for a water turbine nozzle, belonging to the field of water turbines. Background Art

[0002] A water turbine is a power machine that converts the energy of water flow into rotational mechanical energy. It belongs to the turbine machinery in fluid machinery. As early as around 100 BC, the prototype of a water turbine, the water wheel, appeared in China, which was used for irrigation and driving grain processing equipment. Most modern water turbines are installed in hydropower stations to drive generators to generate electricity. In a hydropower station, water from an upstream reservoir is led to the water turbine through a water diversion pipe, which drives the turbine runner to rotate and drives the generator to generate electricity. The water that has done work is discharged downstream through the tailwater pipe. The higher the head and the greater the flow rate, the greater the output power of the water turbine. In the prior art, when performing a pressure test on a water turbine nozzle, it is necessary to select nozzle clamps of different specifications according to the water turbine nozzles of different specifications and diameters. It is troublesome to repeatedly replace the clamps when testing water turbines of different specifications. Therefore, it is necessary to design a pressure measuring device that can adapt to water turbine nozzles of various nozzle specifications. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a pressure measuring device for a turbine nozzle to solve the problems raised in the above-mentioned background technology. The utility model is convenient for clamping turbine nozzles of different diameters and improves the adaptability of the pressure measuring device.

[0004] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a pressure measuring device for a turbine nozzle, comprising a test box, handles are installed on both sides of the test box, a protrusion box is installed above the test box, a display is installed in front of the protrusion box, a pressing block is installed above the test box, the pressing block is located on the front side of the protrusion box, a drain pipe is installed in front of the test box, a protective cover is installed at the end of the drain pipe away from the test box, a limiting sleeve is installed in front of the test box, four clamping strips are installed inside the limiting sleeve, a buffer tube is installed at one end of the limiting sleeve located inside the test box, a pressure sensor is installed inside the buffer tube, a transmission line is electrically connected to the pressure sensor, the other end of the transmission line is electrically connected to the data chip of the display, a sealing block is installed at one end of the buffer tube close to the pressure sensor, and a pressing block is installed above the sealing block.

[0005] Furthermore, a separation plate is installed inside the test box, a circular hole is opened on the separation plate at a position corresponding to the sealing block, a support base is installed above the separation plate, and a buffer tube is installed on the top of the support base.

[0006] Furthermore, a clamping plate is installed at one end of the buffer tube near the sealing block, a pressure sensor is installed on the clamping plate, and a width of the clamping plate is smaller than a diameter of the buffer tube.

[0007] Furthermore, four movable grooves are evenly opened on the limit sleeve, support rods are installed in the four movable grooves, a clamping strip is installed at the other end of the support rod, a telescopic spring is installed at one end of the support rod located in the movable groove, and the other end of the telescopic spring is installed on the limit sleeve.

[0008] Furthermore, a round rod is installed at the bottom of the pressing block, and a return spring is sleeved on one end of the round rod located inside the movable groove.

[0009] Furthermore, a piston is installed at one end of the round rod away from the pressing block, and grooves are provided on both sides of the piston. The position and size of the grooves correspond to the through hole. The through hole is provided on the side of the sealing block close to the buffer tube, and the piston is installed in the installation slot provided on the sealing block.

[0010] The beneficial effects of the utility model: the utility model is a pressure measuring device for a turbine nozzle, and support rods are installed in four evenly opened movable grooves on a limit sleeve, and a telescopic spring is installed at one end of the support rod located inside the movable groove, and a clamping strip is installed at the other end of the support rod. When the turbine nozzle is inserted into the limit sleeve, the turbine nozzle will squeeze the clamping strip around, and the support rod will drive the telescopic spring to retract. At the same time, the telescopic spring will generate an outward thrust to make the clamping strip fit the surface of the turbine nozzle to clamp the turbine nozzle. The clamping strip has a certain movable space inside the limit sleeve, which is convenient for clamping turbine nozzles of different specifications and diameters.

[0011] A return spring is installed at one end of the round rod installed at the bottom of the pressing block, which is located inside the movable groove. Grooves are provided on both sides of the piston installed at the bottom of the round rod. The position and size of the grooves correspond to the through holes provided on the sealing block. When the pressure test of the turbine nozzle is completed, the pressing block is pressed downward to stagger the positions of the grooves and the through holes. The water will flow to the bottom of the test box through the opening formed between the grooves and the through holes, so as to facilitate the timely emptying of the water inside the buffer tube after the test is completed, so as to facilitate the next test.

[0012] The end of the limit sleeve located on the outside of the test box is made of rubber. When the turbine nozzle is inserted into the limit sleeve, the limit sleeve located on the outside of the test box wraps around the turbine nozzle to prevent water leakage during the test and change the pressure test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of a pressure measuring device for a water turbine nozzle according to the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of a test box in a pressure measuring device for a water turbine nozzle according to the utility model;

[0016] Figure 3 This is a schematic diagram of the overall structure of a clamping strip in a pressure measuring device for a water turbine nozzle according to the utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of a sealing block in a pressure measuring device for a turbine nozzle according to the utility model;

[0018] In the figure: 1. test box; 2. handle; 3. press block; 4. display; 5. protrusion box; 6. limit sleeve; 7. drain pipe; 8. protective cover; 9. separation plate; 10. support base; 11. buffer tube; 12. clamping plate; 13. pressure sensor; 14. transmission line; 15. sealing block; 16. movable groove; 17. reset spring; 18. clamping strip; 19. support rod; 20. movable groove; 21. telescopic spring; 22. round rod; 23. through hole; 24. piston; 25. groove; 26. installation slot. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] See also Figure 1-Figure 4The utility model provides a technical solution: a pressure measuring device for a turbine nozzle, comprising a test box 1, handles 2 are installed on both sides of the test box 1, a protruding box 5 is installed above the test box 1, a display 4 is installed in front of the protruding box 5, a pressing block 3 is installed above the test box 1, the pressing block 3 is located at the front side of the protruding box 5, a drain pipe 7 is installed in front of the test box 1, a protective cover 8 is installed at one end of the drain pipe 7 away from the test box 1, a limiting sleeve 6 is installed in front of the test box 1, four clamping strips 18 are installed inside the limiting sleeve 6, a buffer tube 11 is installed at one end of the limiting sleeve 6 located inside the test box 1, a pressure sensor 13 is installed inside the buffer tube 11, a transmission line 14 is electrically connected to the pressure sensor 13, and the other end of the transmission line 14 is connected to the data core of the display 4. The sheets are electrically connected, a sealing block 15 is installed at one end of the buffer tube 11 close to the pressure sensor 13, a pressing block 3 is installed above the sealing block 15, a separation plate 9 is installed inside the test box 1, a circular hole is opened at a position corresponding to the sealing block 15 on the separation plate 9, a support base 10 is installed above the separation plate 9, the buffer tube 11 is installed on the top of the support base 10, a clamping plate 12 is installed at one end of the buffer tube 11 close to the sealing block 15, the pressure sensor 13 is installed on the clamping plate 12, the width of the clamping plate 12 is smaller than the diameter of the buffer tube 11, the bottom of the buffer tube 11 is fixed by the set support base 10, the stability of the buffer tube 11 during the water pressure test is maintained, and the buffer tube 11 is prevented from shaking left and right during the water pressure test to cause errors in the water pressure test.

[0021] See also Figure 3 and Figure 4 , four movable grooves 20 are evenly provided on the limiting sleeve 6, and support rods 19 are installed in the four movable grooves 20, and a clamping strip 18 is installed at the other end of the support rod 19. A telescopic spring 21 is installed at one end of the support rod 19 located in the movable groove 20, and the other end of the telescopic spring 21 is installed on the limiting sleeve 6. A round rod 22 is installed at the bottom of the pressing block 3, and a reset spring 17 is sleeved on one end of the round rod 22 located inside the movable groove 16. A piston 24 is installed at the end of the round rod 22 away from the pressing block 3. Grooves 25 are provided on both sides of the piston 24. The position and size of the grooves 25 correspond to the through hole 23. The through hole 23 is provided on the side of the sealing block 15 close to the buffer tube 11. The piston 24 is installed in the installation slot 26 provided on the sealing block 15. Through the cooperation of the set pressing block 3 and the piston 24, the positions of the grooves 25 and the through holes 23 can be staggered after the water pressure test, so that the water flow inside the buffer tube 11 is introduced into the bottom of the test box 1 for storage.

[0022] Specific implementation method: support rods 19 are installed in the four movable grooves 20 evenly opened on the limiting sleeve 6, and a telescopic spring 21 is installed at one end of the support rod 19 located inside the movable groove 20, and a clamping strip 18 is installed at the other end of the support rod 19. When the turbine nozzle is inserted into the limiting sleeve 6, the turbine nozzle will squeeze the clamping strip 18 around, and the support rod 19 will drive the telescopic spring 21 to retract. At the same time, the telescopic spring 21 will generate an outward thrust to make the clamping strip 18 fit the surface of the turbine nozzle to clamp the turbine nozzle. The clamping strip 18 has a certain movable space inside the limiting sleeve 6, which is convenient for clamping turbine nozzles of different specifications and diameters. The round rod 22 installed at the bottom of the pressing block 3 is installed at one end inside the movable groove 16. Reset spring 17, both sides of the piston 24 installed at the bottom of the round rod 22 are provided with grooves 25, the position and size of the groove 25 correspond to the through hole 23 provided on the sealing block 15, when the pressure test of the turbine nozzle is completed, press the pressing block 3 downward to stagger the positions of the groove 25 and the through hole 23, and the water will flow to the bottom of the test box 1 through the opening formed between the groove 25 and the through hole 23, so as to facilitate the timely emptying of the water flow inside the buffer tube 11 after the test is completed, so as to facilitate the next test. The end of the limit sleeve 6 located on the outside of the test box 1 is made of rubber material. When the turbine nozzle is inserted into the limit sleeve 6, the limit sleeve 6 located on the outside of the test box 1 will wrap around the turbine nozzle to avoid water leakage during the test and change the pressure test result.

[0023] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pressure measuring device for a turbine nozzle, comprising a test box (1), characterized in that: The test box (1) is provided with handles (2) on both sides, a protruding box (5) is provided above the test box (1), a display (4) is provided in front of the protruding box (5), a pressing block (3) is provided above the test box (1), the pressing block (3) is located in front of the protruding box (5), a drainage pipe (7) is provided in front of the test box (1), a protective cover (8) is provided at one end of the drainage pipe (7) away from the test box (1), a limiting sleeve (6) is provided in front of the test box (1), and a protective cover (8) is provided inside the limiting sleeve (6) Four clamping strips (18) are installed, a buffer tube (11) is installed at one end of the limit sleeve (6) located inside the test box (1), a pressure sensor (13) is installed inside the buffer tube (11), a transmission line (14) is electrically connected to the pressure sensor (13), the other end of the transmission line (14) is electrically connected to the data chip of the display (4), a sealing block (15) is installed at one end of the buffer tube (11) close to the pressure sensor (13), and a pressing block (3) is installed above the sealing block (15).

2. A pressure measuring device for a turbine nozzle according to claim 1, characterized in that: A separation plate (9) is installed inside the test box (1), a circular hole is opened on the separation plate (9) at a position corresponding to the sealing block (15), a support base (10) is installed above the separation plate (9), and a buffer tube (11) is installed on the top of the support base (10).

3. The pressure measuring device for a water turbine nozzle according to claim 1, characterized in that: A clamping plate (12) is installed at one end of the buffer tube (11) close to the sealing block (15), a pressure sensor (13) is installed on the clamping plate (12), and the width of the clamping plate (12) is smaller than the diameter of the buffer tube (11).

4. A pressure measuring device for a water turbine nozzle according to claim 1, characterized in that: Four movable grooves (20) are evenly arranged on the limiting sleeve (6), and support rods (19) are installed in the four movable grooves (20). A clamping strip (18) is installed at the other end of the support rod (19). A telescopic spring (21) is installed at one end of the support rod (19) located in the movable groove (20), and the other end of the telescopic spring (21) is installed on the limiting sleeve (6).

5. The pressure measuring device for a water turbine nozzle according to claim 1, characterized in that: A round rod (22) is installed at the bottom of the pressing block (3), and a return spring (17) is sleeved on one end of the round rod (22) located inside the movable groove (16).

6. A pressure measuring device for a water turbine nozzle according to claim 5, characterized in that: A piston (24) is installed at one end of the round rod (22) away from the pressing block (3), and grooves (25) are provided on both sides of the piston (24). The position and size of the grooves (25) correspond to the through hole (23). The through hole (23) is provided on a side of the sealing block (15) close to the buffer tube (11), and the piston (24) is installed in a mounting slot (26) provided on the sealing block (15).

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