Emergency standby valve electric execution device

Abstract

The utility model relates to an emergency standby valve electric executing device which comprises a valve body, an executing mechanism fixedly arranged on the valve body and a driving mechanism fixedly arranged on a closing mechanism. The executing mechanism comprises a main closing assembly, a first supporting column fixedly arranged on the valve body, a first flange fixedly arranged on the first supporting column, a second flange fixedly arranged on the first flange, a second supporting column fixedly arranged on the second flange, a plurality of supporting rods fixedly arranged on the second supporting column and third flanges fixedly arranged on the supporting rods. The fourth flange is fixedly arranged on the third flange, the mounting column is fixedly arranged on the fourth flange, and the standby closing assembly is arranged on the mounting column and the main closing assembly in a sliding mode. The problem that an existing valve electric actuating mechanism cannot close a valve after thread loosening of a valve nut is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric valve actuators, in particular to an emergency standby electric valve actuator. Background Art

[0002] The globe valve is a common valve, usually installed in a pipeline as a pipeline cutting device. In a tower solar power generation system, the valve needs to be opened and closed many times a day. As a long-term working system, the tower solar power generation system has a high switching frequency and a long working time. The transmission components (stem nuts) in the valve are very prone to wear, causing the valve stem and stem nut to slip and the valve cannot be closed normally. The existing valve is only equipped with a single-sided valve stem and stem nut. If the problem of slipping occurs in an emergency, the valve cannot be closed, which will cause serious consequences. Therefore, an emergency backup valve electric actuator is needed, which can still close the valve through the spare valve stem nut in the event of slipping. Utility Model Content

[0003] The content of this application is used to briefly introduce concepts that will be described in detail in the detailed description section below. The content of this application is not intended to identify key features or essential features of the technical solution for which protection is sought, nor is it intended to limit the scope of the technical solution for which protection is sought.

[0004] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide an emergency backup valve electric actuator, including a valve body, an actuator fixed on the valve body, and a drive mechanism fixed on the closing mechanism; the actuator includes a main closing assembly, a first support column fixed on the valve body, a first flange fixed on the first support column, a second flange fixed on the first flange, a second support column fixed on the second flange, a plurality of support rods fixed on the second support column, a third flange fixed on the support rod, a fourth flange fixed on the third flange, a mounting column fixed on the fourth flange, and a backup closing assembly slidably mounted on the mounting column and the main closing assembly. The actuator is used to close or open the valve and is controlled by the drive mechanism; the main closing assembly is used to close or open the valve, and under normal circumstances, the valve is closed or opened by the main closing assembly; the first flange and the second flange are fixed by bolts and nuts; the third flange and the fourth flange are fixed by bolts and nuts; the backup closing assembly closes or opens the valve when the main closing assembly slips.

[0005] Specifically, the main closing assembly includes a first through-hole fixedly mounted on the valve body, a first slide groove fixedly mounted on the first mounting post, a slide rod slidably mounted on the first slide groove, a closing plate fixedly mounted on the slide rod, a valve stem fixedly mounted on the slide rod, a first mounting groove fixedly mounted on the third flange, and a main valve stem nut fixedly mounted on the first mounting groove. The slide rod slides in the first slide groove, driving the closing plate to move, thereby cooperating with the valve to close and open. The valve stem is threaded, and the main valve stem nut has threads on its inner wall that mesh with the threads on the valve stem. Lubrication is provided between the main valve stem nut and the valve stem.

[0006] Specifically, the backup closure assembly includes a plurality of second slots fixedly mounted on the valve stem, a third slot fixedly mounted on the mounting post, a backup valve stem nut slidably mounted on the second and third slots, a plurality of fourth slots fixedly mounted on the backup valve stem nut, a rotating shaft fixedly mounted on the fourth slot, a stopper rotatably mounted on the rotating shaft, and a pressing plate slidably mounted on the fourth slot; the stopper and the fourth slots are connected by a torsion spring. The backup valve stem nut has threads on its inner wall that mate with threads on the valve stem and is lubricated; there is a certain amount of damping between the backup valve stem nut and the third slot, the damping being greater than the damping between the backup valve stem nut and the valve stem; the stopper is initially horizontally disposed, and the width of the portion where the stopper contacts the valve stem is equal to that of the second slot; one end of the stopper contacts the pressing plate; the pressing plate is used to push the stopper to rotate and release the limit; the torsion spring is used to initially maintain the stopper horizontally to prevent the stopper from rotating due to gravity.

[0007] Specifically, the valve body includes a partition plate fixedly provided on the valve body and a second through hole fixedly provided on the partition plate. The second through hole cooperates with the closing plate to realize the opening and closing of the valve.

[0008] Specifically, the drive mechanism includes a housing fixed to the mounting post, a motor fixed within the housing, a drive shaft fixed to the motor, an electronic control board fixed within the housing, a second mounting slot fixed to the mounting post, and a drive gear slidably mounted on the second slot and located within the second mounting slot; the drive gear meshes with the drive shaft. Multiple sliders are provided on the inner side of the drive gear, engaging with the second slot. When the drive gear rotates, the sliders on the gear drive the valve stem. Furthermore, because the threads on the valve stem engage with the main valve stem nut, the valve stem can move up and down during rotation, thereby opening and closing the valve.

[0009] The beneficial effects of the utility model are:

[0010] (1) A spare stem nut is provided. If the main stem nut is loose, the spare stem nut can be unlocked by pressing the pressing plate, so that the valve can continue to be used.

[0011] (2) The spare stem nut will rotate along with the valve stem when the main stem nut has no slipping threads, that is, the spare stem nut and the valve stem are relatively stationary, thus avoiding wear of the spare stem nut when not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings constituting a part of this application are used to provide a further understanding of this application and make other features, purposes and advantages of this application more apparent. The drawings and descriptions of the exemplary embodiments of this application are used to explain this application and do not constitute an improper limitation on this application.

[0013] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the elements and components are not necessarily drawn to scale.

[0014] In the attached figure:

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is a right side view of the utility model;

[0017] Figure 3 for Figure 2 Line section of AA in the middle;

[0018] Figure 4 It is a front view of the utility model;

[0019] Figure 5 for Figure 4 Linear section of the middle BB;

[0020] Figure 6 for Figure 4 Partial line section of CC;

[0021] Figure 7 for Figure 3 A partial enlarged view of point E in the middle. DETAILED DESCRIPTION

[0022] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0023] It should also be noted that, for ease of description, only the parts related to the relevant utility model are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0024] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0026] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0027] Reference Figure 1-7 As shown, the utility model describes an emergency backup valve electric actuator, comprising a valve body 1, an actuator 2 fixed on the valve body, and a driving mechanism 3 fixed on the closing mechanism; the actuator comprises a main closing assembly 21, a first support column 22 fixed on the valve body, a first flange 23 fixed on the first support column, a second flange 24 fixed on the first flange, a second support column 25 fixed on the second flange, a plurality of support rods 26 fixed on the second support column, a third flange 27 fixed on the support rod, a fourth flange 28 fixed on the third flange, a mounting column 29 fixed on the fourth flange, and a backup closing assembly 20 slidably arranged on the mounting column and the main closing assembly.

[0028] Specifically, the main closing assembly includes a first through hole 211 fixed on the valve body, a first slide groove 212 fixed on the first mounting column, a slide rod 213 slidably arranged on the first slide groove, a closing plate 214 fixed on the slide rod, a valve stem 215 fixed on the slide rod, a first mounting groove 216 fixed on the third flange, and a main valve stem nut 217 fixed on the first mounting groove.

[0029] Specifically, the backup closing assembly includes a plurality of second slide grooves 201 fixed on the valve stem, a third slide groove 202 fixed on the mounting column, a backup valve stem nut 203 slidingly arranged on the second slide groove and the third slide groove, a plurality of fourth slide grooves 204 fixedly arranged on the backup valve stem nut, a rotating shaft 205 fixedly arranged on the fourth slide groove, a limit block 206 rotatably arranged on the rotating shaft, and a pressing plate 207 slidingly arranged on the fourth slide groove; the limit block and the fourth slide groove are connected by a torsion spring 208.

[0030] Specifically, the valve body includes a partition plate 11 fixedly provided on the valve body and a second through hole 12 fixedly provided on the partition plate.

[0031] Specifically, the driving mechanism includes a shell 31 fixed on the mounting column, a motor 32 fixed in the shell, a driving shaft 33 fixed on the motor, an electric control board 34 fixed in the shell, a second mounting groove 35 fixed on the mounting column, and a driving gear 36 sliding on the second sliding groove and provided on the second mounting groove; the driving gear is engaged with the driving shaft.

[0032] When the main valve stem nut is slipped, the pressing plate is pressed, and the pressing plate drives the limit block to rotate on the rotating shaft. After the pressing plate is pressed to the bottom, the limit block rotates to a vertical state, and the limit block disengages from the second slide groove, releasing the limit. At this time, the spare valve stem nut is only engaged with the valve stem through the thread. When the motor drives the valve stem to rotate, the rotation friction of the thread engagement is small, which is less than the damping between the spare valve stem nut and the third slide groove. Therefore, the spare valve stem nut is stationary and will not rotate at this time, and the spare valve stem nut can allow the valve stem to continue to move downward to close the valve.

[0033] The above descriptions are merely some preferred embodiments of the present disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed herein is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also encompass other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. An emergency standby electric valve actuator, characterized by: The invention comprises a valve body (1), an actuator (2) fixed on the valve body, and a driving mechanism (3) fixed on the closing mechanism; the actuator comprises a main closing assembly (21), a first supporting column (22) fixed on the valve body, a first flange (23) fixed on the first supporting column, a second flange (24) fixed on the first flange, a second supporting column (25) fixed on the second flange, a plurality of supporting rods (26) fixed on the second supporting column, a third flange (27) fixed on the supporting rods, a fourth flange (28) fixed on the third flange, a mounting column (29) fixed on the fourth flange, and a spare closing assembly (20) slidably arranged on the mounting column and the main closing assembly.

2. The emergency backup electric valve actuator according to claim 1, characterized in that: The main closing assembly includes a first through hole (211) fixed on the valve body, a first sliding groove (212) fixed on the first mounting column, a sliding rod (213) slidably arranged on the first sliding groove, a closing plate (214) fixed on the sliding rod, a valve stem (215) fixed on the sliding rod, a first mounting groove (216) fixed on the third flange, and a main valve stem nut (217) fixed on the first mounting groove.

3. The emergency backup electric valve actuator according to claim 2, characterized in that: The backup closing assembly comprises a plurality of second slide grooves (201) fixed on the valve stem, a third slide groove (202) fixed on the mounting column, a backup valve stem nut (203) slidably arranged on the second slide grooves and the third slide grooves, a plurality of fourth slide grooves (204) fixed on the backup valve stem nut, a rotating shaft (205) fixed on the fourth slide groove, a limit block (206) rotatably arranged on the rotating shaft, and a pressing plate (207) slidably arranged on the fourth slide groove; the limit block and the fourth slide groove are connected by a torsion spring (208).

4. The emergency backup electric valve actuator according to claim 1, characterized in that: The valve body comprises a partition plate (11) fixedly arranged on the valve body and a second through hole (12) fixedly arranged on the partition plate.

5. The emergency backup electric valve actuator according to claim 1, characterized in that: The driving mechanism comprises a housing (31) fixed on the mounting post, a motor (32) fixed in the housing, a driving shaft (33) fixed on the motor, an electric control board (34) fixed in the housing, a second mounting slot (35) fixed on the mounting post, and a driving gear (36) slidably mounted on the second sliding slot and disposed on the second mounting slot; the driving gear is engaged with the driving shaft.

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