Linear electric actuator structure for valve

Abstract

The utility model discloses a linear electric actuator structure for a valve, which comprises a valve body and an actuator body arranged at the upper end of the valve body. The supporting mechanism is used for providing stable support for the actuator body, the locking mechanism is used for connecting and locking the valve body and the actuator body, the reading mechanism is used for displaying the action stroke of the actuator body, and the supporting mechanism is arranged between the actuator body and the valve body. The actuator has the advantages that the supporting mechanism is arranged, the output end of the actuator body and the valve rod can be limited and guided, the locking mechanism is arranged, the output end of the actuator body and the valve rod can be connected and locked, the locking mechanism is arranged, and the reading mechanism is arranged on the side portion of the actuator body. And the reading mechanism is arranged, the extension length of the output end of the actuator body can be displayed, and the requirement of workers for accurately controlling the valve is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric actuator technical field especially is related to a valve linear electric actuator structure. BACKGROUND

[0002] In the prior art, the electric actuator is a driving device providing linear or rotary motion, which works under the action of a certain control signal by using a certain driving energy, and the actuator converts liquid, gas, electricity or other energy into driving action through a motor, a gas cylinder or other devices, and the valve electric actuator is a mechanical device driven by electricity to drive the valve. In the regulating valve, the output end of the electric actuator is usually connected with the valve rod in linkage, the valve rod is connected with the valve core in rotation (screwed), and the valve core is circumferentially limited to avoid rotation. The electric actuator drives the valve rod to rotate to realize the lifting of the valve core. However, the structure has a small application range, the control is not accurate enough, the running precision is low, the valve is easily damaged, the noise generated by the existing electric actuator during work is large, which is not conducive to the realization of silent work of the valve structure, and the connection stability between the electric actuator and the valve rod is poor, and the loosening phenomenon is easy to occur.

[0003] The utility model discloses a linear electric actuator, including support and the electric device of installation on the support, still including the screw sleeve and the linkage rod, the output end of electric device is connected with the upper end of screw sleeve in linkage, the first external thread section is equipped with on the linkage rod upper portion, the first external thread section is screwed with screw sleeve, the lower extreme of linkage rod is equipped with the connecting piece for connecting valve rod, the inner side of support is provided with guide rail along the vertical, connecting piece is slidably arranged on the guide rail. However, the linear electric actuator is connected with the connecting piece through the valve rod alone to realize the transmission connection between the actuator and the valve, lacks locking structure, since the electric actuator drives the valve rod to reciprocate during work, the loosening or disengagement phenomenon is easy to occur between the valve rod and the connecting piece, which leads to the failure of cooperation between the electric actuator and the valve, affects the normal work of the valve, leads to the poor work stability of both, and it cannot accurately control the valve, the running precision is low, the valve is easily damaged, and the noise generated during work is large, which is not conducive to the realization of silent work of the valve structure. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a valve linear electric actuator structure.

[0005] To achieve the above-mentioned purpose, the technical scheme provided by the utility model is as follows:

[0006] The application discloses a linear electric actuator structure for valve, which comprises a valve body and an actuator body arranged at the upper end of the valve body, a supporting mechanism for providing stable support for the actuator body, a locking mechanism for connecting and locking the valve body and the actuator body, and a reading mechanism for displaying the action stroke of the actuator body, wherein the supporting mechanism is arranged between the actuator body and the valve body, the locking mechanism is arranged inside the supporting mechanism, and the reading mechanism is arranged at the side of the actuator body.

[0007] The supporting mechanism comprises a supporting flange, a supporting base and a guide assembly, wherein the supporting flange is arranged at the upper end of the valve body and fixedly connected with the valve body through bolts, the supporting base is arranged at the upper end of the supporting flange and fixedly connected with the supporting flange, and the guide assembly is arranged between the supporting base and the actuator body.

[0008] The guide assembly comprises a guide base, linear guides and guide sliders, wherein the guide base is arranged at one end of the supporting base close to the actuator body and fixedly connected with the supporting base through screws, the output end of the actuator body is arranged correspondingly to the guide base, the linear guides are provided in two groups, the two groups of linear guides are symmetrically arranged between the guide base and the actuator body and fixedly connected with the guide base and the actuator body at two ends respectively, the two groups of linear guides are arranged in parallel with the output end of the actuator body and located on both sides of the output end of the actuator body, and the guide sliders are provided in two groups, the two groups of guide sliders are symmetrically arranged on both sides of the output end of the actuator body and fixedly connected with the output end of the actuator body, and the two groups of guide sliders are slidingly connected with the two groups of linear guides respectively.

[0009] The upper end of the valve body is provided with a valve rod, the valve rod is coaxially arranged with the output end of the actuator body through the supporting flange, the supporting base and the guide base, and one end of the valve rod close to the actuator body is provided with a connecting thread.

[0010] The locking mechanism comprises a locking end and a locking nut, the locking end is arranged at the output end of the actuator and fixedly connected with the output end of the actuator through screws, the locking end is threadedly connected with the valve rod, and the locking nut is arranged at the connecting position of the valve rod and the locking end and threadedly connected with the valve rod.

[0011] The inner part of the locking end and the inner part of the locking nut are both provided with internal threads corresponding to the connecting thread on the valve rod, and the rotation direction of the internal thread of the locking end is opposite to that of the internal thread of the locking nut.

[0012] The reading mechanism includes a mounting base, a mounting rod, a reading arrow, and a reading scale housing. The mounting base is disposed on the side of one set of guide sliders and is fixedly connected to the corresponding guide slider by screws. The mounting rod is disposed at the end of the mounting base away from the locking end and is fixedly connected to the mounting base. The reading arrow is disposed at the end of the mounting rod away from the mounting base and is fixedly connected to the mounting rod. The reading scale housing is disposed on the upper part of one set of linear guides corresponding to the mounting rod and is fixedly connected to the corresponding linear guide by screws. The mounting rod is inserted into the reading scale housing, and the reading arrow is located inside the reading scale housing.

[0013] The reading ruler casing is made of transparent material and has a scale line on one side corresponding to the reading arrow.

[0014] It also includes a display screen and a control handwheel. The display screen is located on the upper side of the actuator body and is fixedly connected to the actuator body. Inside the actuator body, corresponding to the display screen, there is a brushless DC motor. The brushless DC motor is connected to the output end of the actuator body through a transmission structure. Inside the actuator body, corresponding to the brushless DC motor, there is an absolute encoder. The control handwheel is mounted on one side of the actuator body and is connected to the output end of the actuator body through a transmission structure.

[0015] It also includes a connecting cable, which is disposed on one side of the actuator body, and the actuator body is electrically connected to an external power source through the connecting cable.

[0016] The beneficial effects of this utility model are:

[0017] Equipped with a support mechanism, it enables the installation and connection between the actuator body and the valve body, and provides limiting and guiding for the output end of the actuator body and the valve stem. A locking mechanism is also included to lock the connection between the output end of the actuator body and the valve stem, preventing loosening or detachment during operation and ensuring the stability of the actuator and valve. A reading mechanism displays the extension length of the actuator body's output end, meeting the needs of operators for precise valve control. Furthermore, the actuator body uses a DC brushless motor as its drive module, resulting in low operating noise, high accuracy, and reduced risk of valve damage. Additionally, the actuator is equipped with an absolute encoder, achieving an operating accuracy of 0.3%. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2It is the schematic view of the guiding assembly and the actuator body cooperation of the utility model;

[0020] Figure 3 It is the cooperation section view of the locking mechanism and the valve rod of the utility model;

[0021] Figure 4 It is the structure schematic view of the reading mechanism of the utility model.

[0022] In the drawing: 1, valve body;2, actuator body;3, support flange;4, support base block;5, guiding base;6, linear guide rail;7, guiding slider;8, valve rod;9, locking end;10, locking nut;11, installation base shell;12, installation support;13, reading arrow;14, reading ruler shell;15, display screen;16, control hand wheel;17, connecting cable. DETAILED DESCRIPTION

[0023] The utility model will be further described in detail below,

[0024] A linear type electric actuator structure for valve, including valve body 1 and actuator body 2, actuator body 2 is arranged at the upper end of valve body 1, still includes the support mechanism for providing stable support for actuator body 2, the locking mechanism for being connected and locked to valve body 1 and actuator body 2 and the reading mechanism for displaying the action stroke of actuator body 2, support mechanism is arranged between actuator body 2 and valve body 1, locking mechanism is configured inside support mechanism, and reading mechanism is assembled at the side of actuator body 2, and the overall structure schematic view of the utility model is as shown in Figure 1 .

[0025] Support mechanism includes support flange 3, support base block 4 and guiding assembly, support flange 3 is arranged at the upper end of valve body 1 and is fixedly connected with valve body 1 by bolt, support base block 4 is arranged at the upper end of support flange 3 and is fixedly connected with support flange 3, guiding assembly is assembled between support base block 4 and actuator body 2, and support mechanism is installed and connected by support flange 3, support base block 4 and guiding assembly cooperation to actuator body 2 and valve body 1 and provides guiding support for the output end of actuator body 2, wherein, support flange 3 is used to provide installation support for support base block 4 and is connected with valve body 1, support base block 4 is used as the installation structure on valve body 1, thereby providing installation support for guiding assembly, and guiding assembly is used to provide guiding support for the output end of actuator body 2.

[0026] The guiding assembly comprises a guiding base 5, linear guides 6 and guiding sliders 7. The guiding base 5 is arranged at one end of the supporting base block 4 close to the actuator body 2 and is fixedly connected with the supporting base block 4 through screws. The output end of the actuator body 2 is arranged correspondingly with the guiding base 5. The linear guides 6 are provided in two groups. The two groups of linear guides 6 are symmetrically arranged between the guiding base 5 and the actuator body 2 and are fixedly connected with the guiding base 5 and the actuator body 2 at two ends thereof. The two groups of linear guides 6 are arranged in parallel with the output end of the actuator body 2 and are located at two sides of the output end of the actuator body 2. The guiding sliders 7 are provided in two groups. The two groups of guiding sliders 7 are symmetrically arranged at two sides of the output end of the actuator body 2 and are fixedly connected with the output end of the actuator body 2. The two groups of guiding sliders 7 are slidingly connected with the two groups of linear guides 6, respectively. The guiding assembly provides guiding support for the output end of the actuator body 2 through cooperation of the guiding base 5, the linear guides 6 and the guiding sliders 7, so as to avoid deviation of the output end of the actuator body 2 and the valve stem 8 during operation. The guiding base 5 is used for providing mounting support for the linear guides 6 and is cooperated with the supporting base block 4 to realize mounting connection between the actuator body 2 and the valve body 1. The linear guides 6 are used for providing guiding support for the guiding sliders 7. The guiding sliders 7 are used as guiding structures on the output end of the actuator body 2, so as to provide guiding support for the output end of the actuator body 2 under the action of the linear guides 6. The guiding assembly of the utility model is shown in the cooperation diagram with the actuator body 2 as shown in Figure 2

[0027] The valve body 1 is provided with a valve stem 8 at an upper end thereof. The valve stem 8 is coaxially arranged with the output end of the actuator body 2 and penetrates the supporting flange 3, the supporting base block 4 and the guiding base 5. One end of the valve stem 8 close to the actuator body 2 is provided with a connecting thread. The valve stem 8 is connected with the output end of the actuator body 2 in cooperation through the connecting thread.

[0028] The locking mechanism comprises a locking end head 9 and a locking nut 10. The locking end head 9 is arranged at the output end of the actuator and is fixedly connected with the output end of the actuator through screws. The locking end head 9 is threadedly connected with the valve stem 8. The locking nut 10 is arranged at the connecting position of the valve stem 8 and the locking end head 9 and is threadedly connected with the valve stem 8. The inside of the locking end head 9 and the inside of the locking nut 10 are both provided with internal threads corresponding to the connecting thread on the valve stem 8. The internal threads of the locking end head 9 are in opposite direction to the internal threads of the locking nut 10. The locking mechanism realizes locking connection between the valve stem 8 and the output end of the actuator body 2 through cooperation of the locking end head 9 and the locking nut 10. The locking end head 9 is used as mounting structure on the output end of the actuator to be connected with the valve stem 8. The locking nut 10 is used to realize locking connection between the locking end head 9 and the valve stem 8. The opposite direction of the internal threads of the locking end head 9 and the locking nut 10 can improve the assembly stability between the valve stem 8 and the locking end head 9 and prevent the occurrence of tripping phenomenon. The locking mechanism of the utility model is shown in the cooperation section view with the valve stem 8 as shown in​Figure 3 As shown.

[0029] The reading mechanism comprises a mounting base shell 11, a mounting support rod 12, a reading arrow 13 and a reading scale shell 14, the mounting base shell 11 is arranged on the side of one set of guide sliding blocks 7 and is fixedly connected with the corresponding guide sliding block 7 through a screw, the mounting support rod 12 is arranged on the end of the mounting base shell 11 away from the locking end head 9 and is fixedly connected with the mounting base shell 11, the reading arrow 13 is arranged on the end of the mounting support rod 12 away from the mounting base shell 11 and is fixedly connected with the mounting support rod 12, the reading scale shell 14 is arranged on the upper part of one set of linear guide rails 6 corresponding to the mounting support rod 12 and is fixedly connected with the corresponding linear guide rail 6 through a screw, the mounting support rod 12 is inserted into the reading scale shell 14 and the reading arrow 13 is located in the inside of the reading scale shell 14, the reading scale shell 14 is made of transparent material and a scale line is arranged on the side of the reading scale shell 14 corresponding to the reading arrow 13, the reading mechanism displays the extension length of the output end of the actuator body 2 through the cooperation of the mounting base shell 11, the mounting support rod 12, the reading arrow 13 and the reading scale shell 14, so as to meet the accurate control of the valve rod 8 by the staff, wherein the mounting base shell 11 is used for providing mounting support for the mounting support rod 12 and assembling the mounting support rod 12 on the guide sliding block 7, the mounting support rod 12 is used for providing mounting support for the reading arrow 13 and cooperating with the reading scale shell 14 to guide the movement of the reading arrow 13, the reading arrow 13 is used for cooperating with the scale line on the reading scale shell 14 to display the extension length of the output end of the actuator body 2, and the reading scale shell 14 made of transparent material is used as a scale structure to meet the reading requirement of the staff, and the structure diagram of the reading mechanism of the utility model is as shown in Figure 4 As shown.

[0030] The display screen 15 is arranged on the upper side of the actuator body 2 and is fixedly connected with the actuator body 2, the inside of the actuator body 2 is provided with a DC brushless motor corresponding to the display screen 15, the DC brushless motor is in transmission connection with the output end of the actuator body 2 through a transmission structure, and the inside of the actuator body 2 is provided with an absolute value encoder corresponding to the DC brushless motor, the control hand wheel 16 is assembled on the side of the actuator body 2 and is in transmission connection with the output end of the actuator body 2 through a transmission structure, wherein the display screen 15 is used for displaying the working state of the electric actuator, the control hand wheel 16 is used for manually controlling the electric actuator, the DC brushless motor is used as a driving module of the electric actuator, has small operation noise, and the absolute value encoder is used for improving the operation accuracy of the electric actuator.

[0031] The connecting cable 17 is arranged on the side of the actuator body 2, and the actuator body 2 is electrically connected with an external power supply through the connecting cable 17, wherein the connecting cable 17 is used for meeting the requirement of electrically connecting the electric actuator with the external power supply.

[0032] The transmission structure in the electric actuator in the technical solution can adopt the transmission structure in the actuator in the prior art, such as worm gear transmission or planetary gear transmission, and the electric actuator is provided with a mode adjusting dial, the working mode of the electric actuator can be adjusted through the mode adjusting dial, the working principle of the mode adjusting dial, the connection mode of the control hand wheel 16 and the transmission structure and the connection mode of the direct-current brushless motor and the transmission structure are the same as those of the electric actuator in the prior art, and are not the improvement points of the technical solution, so they are not described here.

[0033] Working principle:

[0034] The valve body 1 is installed in the pipeline system, the actuator body 2 is installed on the valve body 1 through the supporting mechanism, the valve rod 8 is locked and connected with the output end of the actuator body 2 through the locking mechanism, the electric actuator is electrically connected with the external power supply through the connecting cable 17, in use, the valve rod 8 can be driven to rise and fall by the output end of the electric actuator, so as to control the working state of the valve, and the valve rod 8 can be accurately controlled by the electric actuator according to the reading of the reading mechanism, and the output end of the actuator body 2 and the valve rod 8 vertically rise and fall under the action of the guide assembly, and the deviation phenomenon does not occur.

[0035] The beneficial effects of the utility model are that the supporting mechanism can realize the installation and connection between the actuator body and the valve body, and can limit and guide the output end of the actuator body and the valve rod, the locking mechanism can connect and lock the output end of the actuator body and the valve rod, so that the loosening or separation between the valve rod and the output end of the actuator body in the working process is avoided, the cooperation between the electric actuator and the valve is not invalid, the working stability of the two is ensured, the reading mechanism can display the extension length of the output end of the actuator body, the demand of the worker for accurately controlling the valve is met, the actuator body adopts the direct-current brushless motor as the driving module, the running noise is small, the running precision is high, and the valve is not easy to be damaged, in addition, the absolute value encoder is arranged in the actuator, and the running precision can reach 3 / 1000.

[0036] The above embodiment of the utility model is described in detail, but the content is only the preferred embodiment of the utility model, and cannot be considered as limiting the implementation range of the utility model. Any equivalent change and improvement within the application range of the utility model should still belong to the patent coverage range of the utility model.

Claims

1. A linear electric actuator structure for valves, comprising a valve body (1) and an actuator body (2) arranged at the upper end of the valve body (1), characterized in that, The support mechanism is arranged between the actuator body (2) and the valve body (1), the locking mechanism is arranged inside the support mechanism, and the reading mechanism is assembled on the side of the actuator body (2).

2. A linear electric actuator for valve applications as claimed in claim 1, wherein, The support mechanism comprises a support flange (3), a support base (4), and a guide assembly. The support flange (3) is arranged at the upper end of the valve body (1) and fixedly connected to the valve body (1) by bolts. The support base (4) is arranged at the upper end of the support flange (3) and fixedly connected to the support flange (3). The guide assembly is assembled between the support base (4) and the actuator body (2).

3. A linear actuator for valve applications as claimed in claim 2, wherein, The guide assembly comprises a guide base (5), linear guides (6), and guide sliders (7). The guide base (5) is arranged at one end of the support base (4) close to the actuator body (2) and fixedly connected to the support base (4) by screws. The output end of the actuator body (2) is arranged correspondingly to the guide base (5). The linear guides (6) are provided in two groups. The two groups of linear guides (6) are symmetrically arranged between the guide base (5) and the actuator body (2) and fixedly connected to the guide base (5) and the actuator body (2) at both ends. The two groups of linear guides (6) are arranged in parallel to the output end of the actuator body (2) and located on both sides of the output end of the actuator body (2). The guide sliders (7) are provided in two groups. The two groups of guide sliders (7) are symmetrically arranged on both sides of the output end of the actuator body (2) and fixedly connected to the output end of the actuator body (2). The two groups of guide sliders (7) are slidingly connected to the two groups of linear guides (6), respectively.

4. A linear actuator arrangement for a valve according to claim 3, wherein the valve is a butterfly valve. The upper end of the valve body (1) is provided with a valve stem (8). The valve stem (8) is coaxially arranged with the output end of the actuator body (2) and penetrates the support flange (3), the support base (4), the guide base (5), and the output end of the actuator body (2). The valve stem (8) is provided with a connecting thread at one end close to the actuator body (2).

5. A linear actuator arrangement for a valve according to claim 4, wherein the valve is a butterfly valve. The locking mechanism comprises a locking end head (9) and a locking nut (10). The locking end head (9) is arranged at the output end of the actuator and fixedly connected to the output end of the actuator by screws. The locking end head (9) is threadedly connected to the valve stem (8). The locking nut (10) is arranged at the connection between the valve stem (8) and the locking end head (9) and threadedly connected to the valve stem (8).

6. A linear actuator arrangement for a valve according to claim 5, wherein the valve is a butterfly valve. The inside of the locking end head (9) and the inside of the locking nut (10) are both provided with internal threads corresponding to the connecting thread on the valve stem (8). The rotation direction of the internal thread of the locking end head (9) is opposite to that of the internal thread of the locking nut (10).

7. A linear actuator arrangement for a valve according to claim 6, wherein the valve is a butterfly valve. The reading mechanism comprises a mounting base shell (11), a mounting support rod (12), a reading arrow (13) and a reading scale shell (14), the mounting base shell (11) is arranged on the side of one of the guide sliders (7) and is fixedly connected with the corresponding guide slider (7) through a screw, the mounting support rod (12) is arranged on the end of the mounting base shell (11) away from the locking end (9) and is fixedly connected with the mounting base shell (11), the reading arrow (13) is arranged on the end of the mounting support rod (12) away from the mounting base shell (11) and is fixedly connected with the mounting support rod (12), the reading scale shell (14) is arranged on the upper part of one of the linear guides (6) corresponding to the mounting support rod (12) and is fixedly connected with the corresponding linear guide (6) through a screw, the mounting support rod (12) is inserted into the reading scale shell and the reading arrow (13) is located in the inside of the reading scale shell (14).

8. A linear actuator arrangement for a valve according to claim 7, wherein the valve is a butterfly valve. The reading scale shell (14) is made of transparent material and is provided with a scale line on the side corresponding to the reading arrow (13).

9. A linear actuator arrangement for a valve according to claim 8, wherein the valve is a butterfly valve. Further comprising a display screen (15) and a control hand wheel (16), the display screen (15) is arranged on the upper side of the actuator body (2) and is fixedly connected with the actuator body (2), the inside of the actuator body (2) is provided with a DC brushless motor corresponding to the display screen (15), the DC brushless motor is drivingly connected with the output end of the actuator body (2) through a transmission structure, the inside of the actuator body (2) is provided with an absolute value encoder corresponding to the DC brushless motor, the control hand wheel (16) is assembled on the side of the actuator body (2) and is drivingly connected with the output end of the actuator body (2) through a transmission structure.

10. A linear actuator arrangement for a valve according to claim 9, wherein the valve is a butterfly valve. Further comprising a connecting cable (17), the connecting cable (17) is arranged on the side of the actuator body (2), the actuator body (2) is electrically connected with an external power supply through the connecting cable (17).

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