Pressure switch connector of emergency distributing valve of speed regulator

Abstract

The utility model discloses a pressure switch connector for an emergency distributing valve of a speed regulator, which relates to the technical field of pressure switch installation and comprises a connector, a locking component and a connecting component, a connecting male head is movably arranged on the connector, and a sealing piece is arranged between the connector and the connecting male head. The locking assembly comprises a locking screw sleeve, a pushing screw sleeve and a plugging piece; the connecting assembly comprises an auxiliary connecting column and a locking piece. The pressure switch is connected with the auxiliary connecting column; the connector is connected with the accident distributing valve, the auxiliary connecting column is connected with the pressure switch, the pressure switch with different signals can be used and installed, the arranged connecting male head can drive the sealing plug to move upwards or downwards, so that the oil way connecting channel is opened or closed, the pressure switch can be replaced under the oil pressure condition, and the replacement cost is reduced. And meanwhile, the arranged sealing piece seals the connector and the male connector, so that oil leakage is avoided in the process of replacing the pressure switch.

Description

Technical Field

[0001] This utility model relates to the field of pressure switch installation technology, specifically to a pressure switch connector for a governor emergency pressure distribution valve. Background Technology

[0002] The governor system in a hydropower plant is an important auxiliary device for automated generator sets. The quality of power supply from the hydropower plant is determined by the governor's operating status. The emergency pressure regulating valve in the governor is a two-position six-way directional valve used in the overspeed protection system of the hydropower station's turbine generator set. When the unit speed is too high and the governor's water-closing mechanism fails, the SGP integrated emergency pressure regulating valve receives the overspeed protection signal and activates. Its valve core reverses under differential pressure, disconnecting the governor. The pressure oil in the oil system directly operates the guide vane servo to urgently close the guide vanes, preventing the unit from overspeeding and providing safe and reliable protection for the normal operation of the turbine generator set. The pressure switch on the emergency pressure regulating valve is used to measure the pressure of the oil circuit system. If the pressure is too low, the unit will enter the emergency shutdown process, causing the unit to fail to stop or become unprepared.

[0003] The pressure switch on the emergency pressure regulating valve has a pass rate of only 20% during the annual calibration process, making it extremely unreliable. However, due to the special nature of the pressure switch connector on the emergency pressure regulating valve (such as...), it remains unreliable. Figure 1 As shown, it cannot be directly replaced with other models of pressure switches, making it difficult for the pressure switches to properly monitor the pressure of the oil circuit system. Utility Model Content

[0004] The main purpose of this utility model is to provide a pressure switch connector for a governor emergency pressure regulating valve, which solves the problem that existing emergency pressure regulating valves are difficult to replace with other models of pressure switches due to the special nature of the connector, thus ensuring normal monitoring of the oil circuit system pressure.

[0005] To achieve the above objectives, this utility model provides a pressure switch connector for a governor emergency pressure regulating valve, wherein the emergency pressure regulating valve is provided with bolt connection holes and oil circuit connection holes spaced apart; it also includes:

[0006] The connector has a bolt connection channel and an oil circuit connection channel spaced apart inside; a male connector is movably mounted on the connector, and a sealing element is provided between the connector and the male connector; a first sealing element is provided inside the oil circuit connection channel, and a snap-fit ​​element is provided between the oil circuit connection channel and the male connector; an auxiliary connection channel communicating with the oil circuit connection channel is provided inside the male connector.

[0007] The locking assembly includes a locking screw sleeve on the connector, a push screw sleeve on the locking screw sleeve, and a sealing member on the male connector; a limiting member is provided between the push screw sleeve and the male connector; the sealing member is provided with a branch connection channel communicating with an auxiliary connection channel; the push screw sleeve moves up or down under the action of external force, so that the male connector moves up and abuts against the oil circuit connection channel through the snap-fit ​​member, or moves down to drive the sealing member to block the oil circuit connection channel;

[0008] The connecting assembly includes an auxiliary connecting post movably disposed on the male connector and a locking member disposed on the male connector; the auxiliary connecting post has an oil passage communicating with an auxiliary connecting channel inside, and a second sealing member is provided between the auxiliary connecting post and the male connector; the pressure switch is connected to the auxiliary connecting post; the locking member abuts against the auxiliary connecting post under the action of external force, thereby making the auxiliary connecting sleeve and the male connector tightly connected.

[0009] As a further improvement of this utility model, the connector is provided with a transition cavity communicating with the oil circuit connection channel, and a sealing groove is provided at the end of the connector away from the male connector; the sealing groove is located outside the oil circuit connection channel; the inner diameter of the transition cavity is larger than the inner diameter of the oil circuit connection channel; the first sealing element includes a first sealing ring installed in the sealing groove.

[0010] As a further improvement of this utility model, the end of the connector away from the sealing groove is provided with an installation channel; the male connector passes through the installation channel and is located in the transition cavity; the sealing member includes a sealing rubber sleeve fitted on the male connector; the sealing rubber sleeve is located in the installation channel.

[0011] As a further improvement of this utility model, the snap-fit ​​component includes a snap-fit ​​ring disposed on the male connector and located within the transition cavity; the snap-fit ​​ring is clearance-fitted with the transition cavity.

[0012] As a further improvement of this utility model, the sealing component includes a sealing rubber plug; the sealing rubber plug is located below the snap ring; the branch connection channel is located on the side wall of the sealing rubber plug.

[0013] As a further improvement of this utility model, the limiting member includes two sets of limiting rings spaced apart on the connecting male head; a sliding groove is formed between the limiting rings; and the pushing screw sleeve is rotatably connected to the sliding groove.

[0014] As a further improvement of this utility model, the male connector is provided with an abutment ring; the second sealing member includes a second sealing ring disposed between the abutment ring and the auxiliary connecting post; the locking member includes a locking nut disposed on the male connector by means of threads.

[0015] The beneficial effects of this utility model are reflected in:

[0016] By connecting the connector to the emergency pressure regulating valve and the auxiliary connecting rod to the pressure switch, pressure switches with different signals can be used and installed. The male connector can move the sealing plug up or down, thereby opening or closing the oil circuit connection channel. The pressure switch can be replaced under oil pressure. At the same time, the sealing part seals the connector and the male connector to prevent oil leakage during the pressure switch replacement process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation structure of the pressure switch for the fault distribution valve in a speed governor.

[0018] Figure 2 This is a schematic diagram of the connection structure of a pressure switch for an emergency pressure distribution valve of a speed controller according to this utility model.

[0019] Figure 3 This is a schematic diagram of the transition cavity structure of the pressure switch connector of the emergency pressure distribution valve of a speed controller according to the present invention.

[0020] Figure 4 This is a cross-sectional structural schematic diagram of a pressure switch connector for an emergency pressure distribution valve of a speed controller according to this utility model.

[0021] Figure 5 This is a schematic diagram of the male connector structure of the pressure switch joint of the emergency pressure distribution valve of the speed controller according to this utility model;

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Emergency pressure regulating valve; 2. Bolt connection hole; 3. Oil circuit connection hole; 4. Connector; 5. Bolt connection channel; 6. Oil circuit connection channel; 7. Male connector; 8. Sealing element; 801. Sealing sleeve; 9. First seal; 10. Snap-fit ​​element; 1001. Snap-fit ​​ring; 11. Auxiliary connection channel; 12. Locking nut; 13. Push nut; 14. Sealing element; 1401. Sealing plug; 15. Limiting element; 15 01. Limiting ring; 1502. Slide groove; 16. Branch connection channel; 17. Auxiliary connecting post; 18. Locking element; 1801. Locking nut; 19. Oil passage; 20. Second seal; 21. Stud; 22. Transition cavity; 23. Sealing groove; 24. Installation channel; 25. Limiting retaining ring; 26. Perforation; 27. Connecting groove; 28. Sealing sleeve; 29. ​​Abutment ring; 30. Fixing ring; 31. Pressure switch. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] In one embodiment, see Figure 2 , 3 4. A speed regulator emergency pressure distribution valve 1 pressure switch 31 connector of this utility model includes a connector 4, a locking component, and a connecting component.

[0026] The emergency pressure regulating valve 1 is provided with bolt connection holes 2 and oil circuit connection holes 3 at intervals; the connector 4 is provided with bolt connection channels 5 and oil circuit connection channels 6 at intervals, the connector 4 is provided with a male connector 7, and a sealing element 8 is provided between the connector 4 and the male connector 7; the oil circuit connection channel 6 is provided with a first sealing element 9, and a snap-fit ​​element 10 is provided between the oil circuit connection channel 6 and the male connector 7; the male connector 7 is provided with an auxiliary connection channel 11 communicating with the oil circuit connection channel 6; the locking assembly includes a locking sleeving 12 provided on the connector 4, a pushing sleeving 13 provided on the locking sleeving 12, and a sealing element 14 provided on the male connector 7, a limiting element 15 is provided between the pushing sleeving 13 and the male connector 7, and a sealing element 14 is provided on the sealing element 14 communicating with the auxiliary connection channel 6; The branch connecting channel 16 is connected to the connecting channel 11; the push sleeve 13 moves up or down under the action of external force, so that the connecting male 7 moves up and abuts against the oil circuit connecting channel 6 through the snap-fit ​​member 10, or moves the connecting male 7 down to drive the sealing member 14 to block the oil circuit connecting channel 6; the connecting assembly includes an auxiliary connecting post 17 movably disposed on the connecting male 7 and a locking member 18 disposed on the connecting male 7. The auxiliary connecting post 17 has an oil passage 19 inside that communicates with the auxiliary connecting channel 11. A second sealing member 20 is provided between the auxiliary connecting post 17 and the connecting male 7; the pressure switch 31 is connected to the auxiliary connecting post 17, and the locking member 18 abuts against the auxiliary connecting post 17 under the action of external force, thereby making the auxiliary connecting sleeve and the connecting male 7 tightly connected.

[0027] Preferably, the connector 4 is threaded to the bolt connection hole 2 via the stud 21 passing through the bolt connection channel 5, thereby connecting the connector 4 to the emergency pressure regulating valve 1.

[0028] Further, see Figure 3The connector 4 has a transition cavity 22 that communicates with the oil circuit connection channel 6. The end of the connector 4 away from the male connector 7 has a sealing groove 23, which is located outside the oil circuit connection channel 6. The inner diameter of the transition cavity 22 is larger than the inner diameter of the oil circuit connection channel 6. The first sealing element 9 includes a first sealing ring installed in the sealing groove 23.

[0029] Preferably, the transition cavity 22 and the oil circuit connection channel 6 are arranged concentrically.

[0030] Preferably, the thickness of the first sealing ring is greater than the depth of the sealing groove 23.

[0031] In the above setup, after the connector 4 is connected to the emergency pressure regulating valve 1 by the stud 21, the first sealing ring is located between the oil circuit connection hole 3 and the oil circuit connection channel 6, thus playing a sealing role.

[0032] Further, see Figure 3 The connector 4 has an installation channel 24 at the end away from the sealing groove 23, and the male connector 7 passes through the installation channel 24 and is located in the transition cavity 22; the sealing member 8 includes a sealing sleeve 801 sleeved on the male connector 7, and the sealing sleeve 801 is located in the installation channel 24.

[0033] Preferably, the outer wall of the male connector 7 is provided with limiting rings 25 located at both ends of the sealing sleeve 801. The sealing sleeve 801 is made of elastic material and is interference-fitted with the installation channel 24.

[0034] Further, see Figure 4 , 5 The snap-fit ​​component 10 includes a snap-fit ​​ring 1001 disposed on the male connector 7 and located in the transition cavity 22, and the snap-fit ​​ring 1001 is clearance-fitted with the transition cavity 22.

[0035] Preferably, the outer diameter of the snap ring 1001 is larger than the inner diameter of the mounting channel 24.

[0036] In the above configuration, after the male connector 7 moves upward, the snap ring 1001 moves upward and abuts against the upper end face of the transition cavity 22, restricting the position of the male connector 7, and the sealing sleeve 801 moves upward to keep the installation channel 24 sealed.

[0037] Further, see Figure 4 , 5 The sealing component 14 includes a sealing plug 1401, which is located below the snap ring 1001, and the branch connection channel 16 is located on the side wall of the sealing plug 1401.

[0038] Preferably, the distance from the sealing plug 1401 to the upper end face of the transition cavity 22 is less than the length of the locking sleeve 12.

[0039] Preferably, the locking sleeve 12 is a hollow cylindrical tube, and the pushing sleeve 13 is a hollow cylinder with one open end. The closed end of the pushing sleeve 13 is provided with a through hole 26, and the pushing sleeve 13 and the locking sleeve 12 are connected by threads.

[0040] Further, see Figure 4 , 5 The limiting member 15 includes two sets of limiting rings 1501 spaced apart on the connecting male head 7, and a sliding groove 1502 is formed between the limiting rings 1501, which pushes the screw sleeve 13 to rotate and connect with the sliding groove 1502.

[0041] Preferably, the male connector 7 passes through the through hole 26 on the push screw sleeve 13, and the closed end of the push screw sleeve 13 is located in the groove 1502.

[0042] Preferably, the pressure switch 31 is provided with a connecting groove 27, and a sealing sleeve 28 is provided inside the connecting groove 27. The auxiliary connecting post 17 is connected to the connecting groove 27 by threads.

[0043] In the above configuration, when the rotating push sleeve 13 moves upward along the locking sleeve 12 under the action of the thread, the connecting male head 7 moves upward accordingly. The upward movement distance of the connecting male head 7 is limited by the snap-fit ​​plate. At this time, the sealing sleeve 801 seals the installation channel 24, and the oil in the transition cavity 22 will not leak from the installation channel 24. The oil circuit connection channel 6 is connected to the auxiliary connection channel 11 through the branch connection channel 16. The oil enters the pressure switch 31, and the oil pressure is displayed by the pressure switch 31. When the rotating push sleeve 13 moves downward along the locking sleeve 12 under the action of the thread, the connecting male head 7 drives the sealing plug 1401 to move downward to seal the oil circuit connection channel 6, thereby cutting off the channel for the oil to enter the transition cavity 22. At this time, the pressure switch 31 can be replaced under pressure.

[0044] Further, see Figure 4 , 5 The male connector 7 is provided with an abutment ring 29, and the second sealing member 20 includes a second sealing ring disposed between the abutment ring 29 and the auxiliary connecting post 17; the locking member 18 includes a locking nut 1801 that is threaded onto the male connector 7.

[0045] Preferably, the auxiliary connecting post 17 is a cylinder with open ends and a hollow interior. An oil passage 19 is formed inside the hollow interior of the auxiliary connecting post 17, and a fixing ring 30 is provided at one end of the auxiliary connecting post 17.

[0046] In the above configuration, the auxiliary connecting post 17 is threadedly connected to the connecting groove 27 on the pressure switch 31. During the connection process, the auxiliary connecting post 17 can be rotated without rotating the pressure switch 31, making the operation more convenient. After the pressure switch 31 and the auxiliary connecting post 17 are connected, the locking nut 1801 is rotated to abut against the fixing ring 30, so that the fixing ring 30 abuts against the abutting ring 29, thereby sealing the male connector 7 and the auxiliary connecting post 17.

[0047] In this embodiment, after the stud 21 passes through the bolt connection channel 5 and is threaded to the bolt connection hole 2, the connector 4 is connected to the emergency pressure regulating valve 1. The first sealing ring seals the oil circuit connection channel 6 and the oil circuit connection hole 3. The auxiliary connector 17 is connected to the pressure switch 31, and the locking sleeving 1801, the second sealing ring connector 7 and the auxiliary connector 17 are sealed. The auxiliary connector 4 can be connected to pressure switches 31 with different signals. The model and specifications of the auxiliary connector 4 can be determined according to the connection groove 27 on the pressure switch 31.

[0048] When replacing pressure switch 31, rotate push sleeve 13 to move male connector 7 downward, causing sealing plug 1401 to seal oil circuit connection channel 6. At this time, oil cannot enter pressure switch 31. Loosen locking sleeve 1801, rotate auxiliary connecting column 17 to separate from connecting groove 27, and the old pressure switch 31 can be removed and a new pressure switch 31 can be installed. After the new pressure switch 31 is installed, rotate push sleeve 13 in the opposite direction to move male connector 7 upward, and sealing plug 1401 opens oil circuit connection channel 6. Oil enters pressure switch 31 from branch connection channel 16 and oil pressure is monitored through pressure switch 31.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure switch connector for a governor emergency pressure regulating valve, wherein the emergency pressure regulating valve (1) is provided with bolt connection holes (2) and oil circuit connection holes (3) spaced apart; characterized in that, Also includes: A connector (4) is provided with a bolt connection channel (5) and an oil circuit connection channel (6) spaced apart inside the connector (4); a male connector (7) is movably provided on the connector (4), and a sealing element (8) is provided between the connector (4) and the male connector (7); a first sealing element (9) is provided inside the oil circuit connection channel (6), and a snap-fit ​​element (10) is provided between the oil circuit connection channel (6) and the male connector (7); an auxiliary connection channel (11) communicating with the oil circuit connection channel (6) is provided inside the male connector (7); The locking assembly includes a locking sleeve (12) on the connector (4), a push sleeve (13) on the locking sleeve (12), and a sealing member (14) on the male connector (7); a limiting member (15) is provided between the push sleeve (13) and the male connector (7); the sealing head is provided with a branch connection channel (16) communicating with the auxiliary connection channel (11); the push sleeve (13) moves up or down under the action of external force, so that the male connector (7) moves up and abuts against the oil circuit connection channel (6) through the snap-fit ​​member (10), or the male connector (7) moves down and drives the sealing member (14) to block the oil circuit connection channel (6); The connecting assembly includes an auxiliary connecting post (17) movably disposed on the male connector (7) and a locking member (18) disposed on the male connector (7); the auxiliary connecting post (17) has an oil passage (19) communicating with the auxiliary connecting channel (11) inside, and a second sealing member (20) is provided between the auxiliary connecting post (17) and the male connector (7); the pressure switch (31) is connected to the auxiliary connecting post (17); the locking member (18) abuts against the auxiliary connecting post (17) under the action of external force, thereby making the auxiliary connecting sleeve tightly connected to the male connector (7).

2. The pressure switch connector for a governor emergency pressure distribution valve according to claim 1, characterized in that: The connector (4) has a transition cavity (22) that communicates with the oil circuit connection channel (6). The end of the connector (4) away from the male connector (7) has a sealing groove (23). The sealing groove (23) is located outside the oil circuit connection channel (6). The inner diameter of the transition cavity (22) is larger than the inner diameter of the oil circuit connection channel (6). The first sealing element (9) includes a first sealing ring installed in the sealing groove (23).

3. The pressure switch connector for a governor emergency pressure distribution valve according to claim 2, characterized in that: The connector (4) has an installation channel (24) at one end away from the sealing groove (23); the male connector (7) passes through the installation channel (24) and is located in the transition cavity (22); the sealing member (8) includes a sealing sleeve (801) sleeved on the male connector (7); the sealing sleeve (801) is located in the installation channel (24).

4. The pressure switch connector for a governor emergency pressure distribution valve according to claim 3, characterized in that: The snap-fit ​​component (10) includes a snap-fit ​​ring (1001) disposed on the male connector (7) and located in the transition cavity (22); the snap-fit ​​ring (1001) is clearance-fitted with the transition cavity (22).

5. A pressure switch connector for a governor emergency pressure distribution valve according to claim 4, characterized in that: The sealing component (14) includes a sealing plug (1401); the sealing plug (1401) is located below the snap ring (1001); the branch connection channel (16) is located on the side wall of the sealing plug (1401).

6. A pressure switch connector for a governor emergency pressure distribution valve according to claim 5, characterized in that: The limiting member (15) includes two sets of limiting rings (1501) spaced apart on the connecting male head (7); a sliding groove (1502) is formed between the limiting rings (1501); the pushing screw sleeve (13) is rotatably connected to the sliding groove (1502).

7. A pressure switch connector for a governor emergency pressure distribution valve according to claim 6, characterized in that: The male connector (7) is provided with an abutment ring (29); the second sealing member (20) includes a second sealing ring disposed between the abutment ring (29) and the auxiliary connecting post (17); the locking member (18) includes a locking nut (1801) disposed on the male connector (7) by means of threads.

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