CN212804381U

CN212804381U - Speed regulator power-off shutdown valve with locking function

Info

Publication number: CN212804381U
Application number: CN202021321293.0U
Authority: CN
Inventors: 徐威; 郑伟; 吴肖宇; 王志康
Original assignee: Three Gorges Nengshida Electric Co ltd
Current assignee: Three Gorges Nengshida Electric Co ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-03-26
Anticipated expiration: 2030-07-06

Abstract

The utility model provides a speed regulator of area shutting function loses electric shutdown valve. The shutdown valve comprises a single-coil electromagnetic directional valve, a feedback contact device and an ingot locking mechanism; the single-coil electromagnetic directional valve comprises a valve body and a valve core, wherein a return spring is arranged on one side of the valve body and is tightly attached to the end face of the valve core; a static iron core is arranged on the other side of the valve body, an electromagnetic coil is sleeved outside the static iron core, a movable iron core is arranged in the static iron core, a small spring is sleeved outside a push rod of the movable iron core, which is close to one end of the valve core, and the small spring is tightly attached to the other end face of the valve core; the feedback contact device is arranged on one side of the valve body where the reset spring is arranged, the ingot locking mechanism is arranged on the other side of the valve body and comprises an ingot locking cover and an ingot locking rod, and the ingot locking rod is inserted into a through hole leading to the movable iron core from one end, far away from the static iron core, of the ingot locking cover and is locked through an ingot locking screw. The utility model discloses have and throw off "lose electricity on line and close" function to ability real time monitoring case motion position situation improves the fail safe nature of power station site operation.

Description

Speed regulator power-off shutdown valve with locking function

Technical Field

The utility model relates to a control valve specifically is a speed regulator of taking blocking function loses electric shut down valve, should lose electric shut down valve and be applicable to hydraulic turbine speed regulator.

Background

The traditional speed regulator emergency stop valve is of a two-position slide valve structure, and can select an electrified switching function valve and a power-off switching function valve according to the field use requirements of a power station. The electrified switching function valve needs to remotely control the action of the emergency stop valve under the condition that a power supply exists, and the power-off switching function valve can act under the action of a spring of the emergency stop valve under the condition that the power supply is lost. However, the conventional speed regulator emergency stop valve control can only select a single mode, and considering the ideas of safety, reliability and redundancy configuration, the two control modes are considered to be the imperative way for the development of a speed regulating system.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a fail the function defect that realizes the electric action of closing and lose the electric urgent shut-off to current speed regulator emergency stop valve simultaneously provides a speed regulator that takes blocking function and loses the electric stop valve. The power-off shutdown valve can realize power-off shutdown action and has a locking function, and can realize on-line power-off shutdown function and selective switching on and off of a power-on shutdown function by being connected in series with a conventional double-coil emergency shutdown valve.

In order to achieve the technical purpose, the utility model provides a technical scheme is a speed regulator of taking blocking function loses the electricity shutdown valve, its characterized in that: the shutdown valve comprises a single-coil electromagnetic directional valve, and a device and an ingot locking mechanism which are respectively provided with feedback contact points at two ends of the single-coil electromagnetic directional valve; the single-coil electromagnetic directional valve comprises a valve body and a valve core, wherein the valve core is sleeved in the valve body, one side of the valve body is provided with a return spring, and the return spring is tightly attached to the end face of the valve core; the other side of the valve body is provided with an electromagnetic coil, a movable iron core, a static iron core and a small spring, the static iron core is sleeved in the electromagnetic coil and is screwed on the valve body, the movable iron core is integrally sleeved in the static iron core, push rods are arranged at two ends of the movable iron core respectively, the small spring is sleeved outside the push rod of the movable iron core close to the end of the valve core, and the small spring and the push rod at the side are tightly attached to the other end face of the valve core; the feedback contact device is arranged on one side of the valve body provided with the reset spring, the ingot locking mechanism comprises an ingot locking cover connected to the static iron core and an ingot locking rod arranged in the ingot locking cover, one end of the ingot locking cover far away from the static iron core is provided with a locking jack leading to the movable iron core, and the ingot locking rod is inserted from the locking jack and locked through an ingot locking screw.

The utility model discloses better technical scheme: the single-coil electromagnetic directional valve is a two-position three-way electromagnetic directional sliding valve and also comprises a plug; the stiffness of the small spring is smaller than that of the return spring.

The utility model discloses better technical scheme: the position feedback contact device realizes the position signal output function of the valve core of the electromagnetic directional valve; a position switch and a direct-connected push rod are arranged in the position feedback contact device, and the direct-connected push rod is sleeved on a return spring and pushes a valve core; when the valve core of the electromagnetic directional valve moves, the direct-connected push rod is driven to move, and the direct-connected push rod drives the position switch to act to output a displacement signal.

The utility model discloses better technical scheme: the diameter of the middle part of the movable iron core is larger than the diameters of the push rods at two sides, and the push rods at two sides are arranged on the central line of the movable iron core; the static iron core is of a cylindrical structure, and two sides of the static iron core are provided with external threads.

The utility model discloses better technical scheme: the spindle locking cover is of a cylindrical shell structure, a stepped through hole is formed in the spindle locking cover, threads are machined on the spindle locking cover, the locking jack is communicated with the stepped through hole, and a plurality of threaded mounting holes for spindle locking screws are machined in the circumferential direction of the spindle locking cover; the ingot locking rod is in a stepped shaft form with a thick middle part and two thin ends, one end of the ingot locking rod is a polished rod, the other end of the ingot locking rod is a threaded rod, the polished rod end of the ingot locking rod is inserted into the ingot locking cover and screwed, and an inner hexagonal wrench fastening hole is processed at the threaded rod end of the ingot locking rod; and the locking ingot screws are arranged in the corresponding thread mounting holes and are screwed tightly.

The utility model discloses better technical scheme: the electromagnetic coil, the movable iron core, the static iron core and the small spring on one side of the valve body can be replaced with the reset spring on the other side, so that the opposite action function of the electromagnetic reversing valve is realized.

The utility model discloses better technical scheme: the locking ingot cover is sleeved and screwed on the thread end of the static iron core of the electromagnetic reversing valve and tightly attached to the electromagnetic coil with the locking ingot rod and the locking ingot screw.

The working principle of the utility model is as follows: when the locking spindle rod is screwed through the threaded rod and attached to the end face of the inner cavity of the locking spindle cover, the locking function is in an exit state, the middle thick position of the locking spindle rod is the locking spindle screw for screwing the locking spindle, and the locking spindle rod cannot limit the position of the movable iron core push rod. When the electromagnetic coil of the single-coil electromagnetic reversing valve is electrified, the movable iron core in the electromagnetic coil pushes the valve core to move towards the direction of the reset spring, the electromagnetic reversing valve can be switched to the shutdown valve to reset, when the electromagnetic coil is not electrified, the movable iron core in the electromagnetic coil loses thrust, the valve core of the electromagnetic reversing valve moves towards the direction of the electromagnetic coil under the action of the reset spring, and the electromagnetic reversing valve can be switched to the shutdown valve to be put into a shutdown position. When the spindle locking rod is far away from the end face of the inner cavity of the spindle locking cover through the rotation of the threaded rod, the spindle locking screw can tightly lock the threaded rod end of the spindle locking rod, the locking function is in an input state, the optical rod end of the spindle locking rod pushes the valve core to the maximum displacement position in the direction of the reciprocating spring through pushing the movable iron core push rod, the electromagnetic directional valve can be switched to the stop valve to reset, and the electromagnetic coil cannot move when being powered on or powered off.

Compare with current speed regulator stop valve, the utility model has the advantages of it is following:

(1) the utility model discloses can realize the shutdown function under reset spring's effect when the speed governing system power is lost, satisfy the fail safe nature demand of power station operation.

(2) The utility model discloses the conventional twin coil solenoid directional valve of collocation is established ties and is used, can realize that "lose the electricity and close" and "get the electricity and close" online selectivity throw and move back the function, need not the on-the-spot valves of dismouting.

(3) The utility model discloses dispose position feedback contact device, but real time monitoring emergency stop valve case motion position situation.

(4) The valve has strong expansibility and can be used for the expanded application of power-off closing of other functional valves.

The utility model discloses the needle has realized losing the electricity and has closed the action and from taking the shutting function, establishes ties through it and conventional twin coil emergency shutdown valve and uses and to realize losing the electricity on line and close the function and gain the selectivity of electricity and close the function and throw off.

Drawings

FIG. 1 is a schematic structural view of the present invention showing the locking function in the exit state;

fig. 2 is a schematic structural view of the present invention in which the locking function is in an engaged state.

The labels in the figure are: 1-position feedback contact device, 2-directly connected push rod, 3-reset spring, 4-valve body, 5-valve core, 6-small spring, 7-static iron core, 8-movable iron core, 9-electromagnetic coil, 10-ingot locking cover, 11-ingot locking rod, 12-plug, 13-ingot locking screw and 14-locking jack.

Detailed Description

The present invention will be further explained with reference to the drawings and examples. Fig. 1 is a drawing of an embodiment, which is drawn in a simplified manner and is only used for the purpose of clearly and concisely illustrating an embodiment of the present invention. The following detailed description of the embodiments of the present invention is presented in the drawings and is not intended to limit the scope of the invention as claimed. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The embodiment provides a speed regulator power-off shutdown valve with a locking function, as shown in fig. 1 and fig. 2, the speed regulator power-off shutdown valve comprises a single-coil electromagnetic directional valve, a plug 12, a feedback contact device 1 and a locking mechanism, wherein the feedback contact device 1 and the locking mechanism are respectively arranged at two ends of the single-coil electromagnetic directional valve; the single-coil electromagnetic directional valve is a two-position three-way electromagnetic directional sliding valve, the single-coil electromagnetic directional valve comprises a valve body 4 and a valve core 5, the valve core 5 is sleeved inside the valve body 4, a return spring 3 is installed on one side of the valve body 4, and the return spring 3 is tightly attached to the end face of the valve core 5; the other side of the valve body 4 is provided with an electromagnetic coil 9, a movable iron core 8, a static iron core 7 and a small spring 6, the static iron core 7 is of a cylindrical structure, the two sides of the static iron core are provided with external threads, the static iron core 7 is sleeved in the electromagnetic coil 9 and is screwed and installed on the valve body 4, the diameter of the middle part of the movable iron core 8 is larger than that of push rods at the two sides, and the push rods at the two sides are arranged on the central line of the movable iron core 8; the movable iron core 8 is integrally sleeved in the static iron core 7, push rods are arranged at two ends of the movable iron core respectively, the small spring 6 is sleeved outside the push rod at the end, close to the valve core 5, of the movable iron core 8, and the small spring 6 and the side push rod are tightly attached to the other end face of the valve core 5; the stiffness of the small spring 6 is smaller than that of the return spring 3. The electromagnetic coil 9, the movable iron core 8, the static iron core 7 and the small spring 6 on one side of the valve body 4 can be replaced with the reset spring 3 on the other side, so that the opposite action function of the electromagnetic reversing valve is realized.

In the speed regulator power-off shutdown valve with the locking function in the embodiment, the position feedback contact device 1 realizes the position signal output function of the valve core 5 of the electromagnetic directional valve. As shown in fig. 1 and fig. 2, a position switch and a direct connection push rod 2 are arranged in the position feedback contact device 1, the feedback contact device 1 is arranged on one side of a valve body 4 where a return spring 3 is installed, and the direct connection push rod 2 is sleeved on the return spring 3 and pushes a valve core 5; when the valve core 5 of the electromagnetic directional valve moves, the directly-connected push rod 2 is driven to move, and the directly-connected push rod 2 drives the position switch to act to output a displacement signal. The ingot locking mechanism comprises an ingot locking cover 10 connected to the static iron core 7 and an ingot locking rod 11 arranged in the ingot locking cover 10, the ingot locking cover 10 is of a cylindrical shell structure, a step through hole is formed in the ingot locking cover 10, threads are machined in the ingot locking cover, a locking jack 14 leading to the movable iron core 8 is arranged at one end, away from the static iron core 7, of the ingot locking cover 10, the locking jack 14 is communicated with the step through hole in the ingot locking cover 10, and threaded mounting holes of a plurality of ingot locking screws 13 are machined in the circumferential direction of the ingot locking cover 10; the ingot locking rod 11 is in a stepped shaft form with a thick middle part and two thin ends, one end is a polished rod, the other end is a threaded rod, the polished rod end of the ingot locking rod 11 is inserted into the ingot locking cover 10 and screwed, and the threaded rod end of the ingot locking rod 11 is provided with an inner hexagonal wrench fastening hole; and the ingot locking screw 13 is arranged in the corresponding threaded mounting hole and is screwed tightly to lock the ingot locking rod 11. The ingot locking cover 10 is sleeved and screwed on the thread end of the static iron core 7 of the electromagnetic reversing valve with an ingot locking rod 11 and an ingot locking screw 13 and is tightly attached to the electromagnetic coil 9.

The utility model provides a speed regulator that takes blocking function loses electric shutdown valve working process as follows: when the spindle locking rod 11 is screwed by the threaded rod and is attached to the end surface of the inner cavity of the spindle locking cover 10, as shown in fig. 1, the locking function is in an exiting state, at the moment, the spindle locking screw 13 screws the spindle locking rod at the position with a thicker middle part of the spindle locking rod 11, and the spindle locking rod 11 cannot play a position limiting role on the push rod of the movable iron core 8. When the electromagnetic coil 9 of the single-coil electromagnetic reversing valve is electrified, the movable iron core 8 in the electromagnetic coil pushes the valve core 5 to move in the direction of the reciprocating spring 3, the electromagnetic reversing valve can be switched to the reset position of the shutdown valve, when the electromagnetic coil 9 is electrified, the movable iron core 8 in the electromagnetic coil 9 loses the pushing force, the valve core 5 of the electromagnetic reversing valve moves in the direction of the electromagnetic coil under the action of the reset spring, and the electromagnetic reversing valve can be switched to the shutdown valve to be put into the shutdown position.

When the spindle locking rod 11 is far away from the end face of the inner cavity of the spindle locking cover 10 through the rotation of the threaded rod, as shown in fig. 2, the spindle locking screw 13 can tightly lock the threaded rod end of the spindle locking rod 11, the locking function is in a switching state, at the moment, the polished rod end of the spindle locking rod 11 pushes the valve core 5 to the maximum displacement position in the direction of the reciprocating spring 3 through pushing the push rod of the movable iron core 8, the electromagnetic directional valve can be switched to the reset position of the stop valve, and the electromagnetic coil 9 cannot move with the power-off valve core 5 when being powered.

The utility model discloses the speed regulator of taking blocking function loses the electricity shut-down valve can not confine to speed regulator owner distributing valve control field, and other functional valve member "lose the electricity and close" function expansion can also cover within the utility model.

To sum up, for the utility model discloses an embodiment of listing, nevertheless the utility model discloses not only be limited to above-mentioned embodiment, as long as reach with any same or similar means the technical effect of the utility model, all should belong to the scope of the protection of the utility model.

Claims

1. The utility model provides a speed regulator of area shutting function loses electric shutdown valve which characterized in that: the shutdown valve comprises a single-coil electromagnetic directional valve, and a feedback contact device (1) and an ingot locking mechanism which are respectively arranged at two ends of the single-coil electromagnetic directional valve; the single-coil electromagnetic directional valve comprises a valve body (4) and a valve core (5), wherein the valve core (5) is sleeved in the valve body (4), a return spring (3) is installed on one side of the valve body (4), and the return spring (3) is tightly attached to the end face of the valve core (5); an electromagnetic coil (9), a movable iron core (8), a static iron core (7) and a small spring (6) are mounted on the other side of the valve body (4), the static iron core (7) is sleeved in the electromagnetic coil (9) and is screwed and mounted on the valve body (4), the movable iron core (8) is integrally sleeved in the static iron core (7), push rods are respectively arranged at two ends of the movable iron core (8), the small spring (6) is sleeved outside the push rod at the end, close to the valve core (5), of the movable iron core (8), and the small spring (6) and the push rod at the side are tightly attached to the other end face of the valve core (5); the feedback contact device (1) is arranged on one side of the valve body (4) where the reset spring (3) is installed, the ingot locking mechanism comprises an ingot locking cover (10) connected to the static iron core (7) and an ingot locking rod (11) installed in the ingot locking cover (10), one end, far away from the static iron core (7), of the ingot locking cover (10) is provided with a locking jack (14) leading to the movable iron core (8), and the ingot locking rod (11) is inserted from the locking jack (14) and locked through an ingot locking screw (13).

2. The governor power-off shutdown valve with the locking function of claim 1, characterized in that: the single-coil electromagnetic directional valve is a two-position three-way electromagnetic directional sliding valve and also comprises a plug (12); the rigidity of the small spring (6) is smaller than that of the return spring (3).

3. A speed regulator power-off shutdown valve with a lockout function according to claim 1 or 2, wherein: the feedback contact device (1) realizes the position signal output function of the valve core (5) of the electromagnetic directional valve; a position switch and a direct-connection push rod (2) are arranged in the feedback contact device (1), and the direct-connection push rod (2) is sleeved on a return spring (3) and pushes a valve core (5); when a valve core (5) of the electromagnetic directional valve moves, the direct-connected push rod (2) is driven to move, and the direct-connected push rod (2) drives the position switch to act to output a displacement signal.

4. A speed regulator power-off shutdown valve with a lockout function according to claim 1 or 2, wherein: the diameter of the middle part of the movable iron core (8) is larger than the diameters of the push rods at the two sides, and the push rods at the two sides are arranged on the central line of the movable iron core (8); the static iron core (7) is of a cylindrical structure, and two sides of the static iron core are provided with external threads.

5. A speed regulator power-off shutdown valve with a lockout function according to claim 1 or 2, wherein: the spindle locking cover (10) is of a cylindrical shell structure, a stepped through hole is formed in the spindle locking cover, threads are machined on the spindle locking cover, the locking insertion hole (14) is communicated with the stepped through hole, and threaded mounting holes of a plurality of spindle locking screws (13) are machined in the circumferential direction of the spindle locking cover (10); the ingot locking rod (11) is in a stepped shaft form with a thick middle part and thin two ends, one end is a polished rod, the other end is a threaded rod, the polished rod end of the ingot locking rod (11) is inserted into the ingot locking cover (10) and screwed, and the threaded rod end of the ingot locking rod (11) is provided with an inner hexagonal wrench fastening hole; and the locking ingot screws (13) are arranged in the corresponding thread mounting holes and are screwed tightly.

6. A governor power-off shutdown valve with a lockout function according to claim 1 or 2, wherein: the electromagnetic coil (9), the movable iron core (8), the static iron core (7) and the small spring (6) on one side of the valve body (4) can be replaced with the reset spring (3) on the other side, and the opposite action function of the electromagnetic reversing valve is realized.

7. The governor power-off shutdown valve with the locking function as claimed in claim 2, characterized in that: the ingot locking cover (10) is sleeved and screwed on the thread end of the static iron core (7) of the electromagnetic reversing valve with an ingot locking rod (11) and an ingot locking screw (13) and tightly attached to the electromagnetic coil (9).