Mining intrinsically safe electric push rod

Abstract

The utility model relates to the technical field of electric push rods, and provides a mining intrinsically safe electric push rod which comprises a pipe body and a push rod arranged at one end of the pipe body, one end of the pipe body is further provided with a connecting part, and the connecting part is arranged on the radial outer side of the push rod and is connected with a controlled component in a sealed mode. According to the embodiment of the utility model, one end of the pipe body is provided with the connecting part which is hermetically connected with the controlled part, and the connecting part is arranged on the radial outer side of the push rod, so that the push rod can be effectively protected while the electric push rod is hermetically connected with the controlled part, the intrinsic safety explosion-proof requirement of the electric push rod is met, and the application range is wide.

Description

Technical Field

[0001] This utility model relates to the field of electric linear actuator technology, specifically to an intrinsically safe electric linear actuator for mining applications. Background Technology

[0002] When existing electric actuators and other drive mechanisms are connected to the hydraulic control valves of hydraulic supports, they cannot meet the explosion-proof requirements in underground coal mines and cannot be used for hydraulic control valves, thus affecting the control accuracy and service life of the hydraulic control valves. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide an intrinsically safe electric actuator for mining, so as to at least solve the technical problem that when the drive mechanism such as electric actuator is connected to the control valve of the hydraulic support, it cannot meet the explosion-proof requirements in underground coal mines, thus affecting the control accuracy and service life of the hydraulic control valve.

[0004] To solve the above-mentioned technical problems, the embodiments of this utility model adopt the following technical solutions:

[0005] This utility model provides an intrinsically safe electric actuator for mining, including a tube body and a push rod disposed at one end of the tube body. One end of the tube body is also provided with a connecting part, which is disposed on the radially outer side of the push rod and is sealed to the controlled component.

[0006] In some embodiments, the connecting portion includes a connecting protrusion, and the controlled component has a connecting groove that engages with the connecting protrusion.

[0007] In some embodiments, the groove of the connecting groove is provided with an extension extending radially inward toward the connecting groove, the extension abutting against the sidewall of the connecting protrusion, and the outer side of the extension abutting against the end of the connecting protrusion.

[0008] In some embodiments, the diameter of the connecting protrusion is larger than the inner diameter of the connecting groove.

[0009] In some embodiments, the connecting groove includes a first sidewall and a second sidewall arranged radially from the inside to the outside, wherein the length of the first sidewall is greater than the length of the second sidewall.

[0010] In some embodiments, a sealing ring is provided between the connecting groove and the connecting portion.

[0011] In some embodiments, the connecting portion is an arc-shaped connecting portion, symmetrically arranged on opposite sides of the tube body.

[0012] In some embodiments, a push rod control motor is provided at the tail end of the tube.

[0013] In some embodiments, the tube body is a metal tube body.

[0014] In some embodiments, the controlled component is a hydraulic valve, which includes a valve body and a valve core disposed within the valve body. The electric push rod is connected to the valve body via the connecting portion, and the push rod is connected to the valve core.

[0015] This utility model provides an intrinsically safe electric actuator for mining. By setting a connecting part at one end of the tube body to be sealed and connected to the controlled component, and setting the connecting part on the radial outside of the actuator, the electric actuator can be sealed and connected to the controlled component while effectively protecting the actuator, meeting the intrinsic safety and explosion-proof requirements of the electric actuator, and has a wide range of applications. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the intrinsically safe electric actuator for mining, according to an embodiment of the present invention.

[0018] Figure label:

[0019] 1-Pipe body, 11-Connecting part, 2-Push rod, 3-Push rod control motor, 4-Sealing ring; 20-Controlled component, 201-Connecting groove, 2011-First side wall, 2012-Second side wall, 202-Extension, 203-Valve body, 204-Valve core. Detailed Implementation

[0020] Various embodiments and features of this utility model are described herein with reference to the accompanying drawings.

[0021] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this invention will be apparent to those skilled in the art.

[0022] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0023] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0024] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the present invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0025] The above and other aspects, features and advantages of the present invention will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0026] Specific embodiments of the present invention will now be described with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of the present invention, which may be implemented in various ways. Well-known and / or repeated functions and structures have not been described in detail to avoid unnecessary or redundant details that could obscure the present invention. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of substantially any suitable detailed structures.

[0027] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to the present invention.

[0028] Figure 1 A schematic diagram of the intrinsically safe electric actuator for mining, according to an embodiment of this utility model, is shown. Figure 1 As shown in the figure, an intrinsically safe electric push rod for mining provided by this utility model includes a tube body 1 and a push rod 2 disposed at one end of the tube body 1. The tube body 1 is also provided with a connecting part 11, which is disposed on the radially outer side of the push rod 2 and is sealed to the controlled component 20.

[0029] An electric linear actuator controller is installed inside the tube body 1. The tube body 1 is also equipped with a linear actuator control motor 3 connected to the electric linear actuator controller. The electric linear actuator controller converts the bus control signal into a drive power supply for the linear actuator control motor 3, and controls the extension and retraction direction and speed of the linear actuator 2, thereby controlling the controlled components 20 such as the hydraulic control valve.

[0030] The intrinsically safe electric push rod for mining provided in this embodiment of the utility model has a connecting part 11 that is sealed and connected to the controlled component 20 at one end of the tube body 1. The connecting part 11 is located on the radial outer side of the push rod 2. While sealing and connecting the electric push rod to the controlled component 20, the push rod 2 can be effectively protected, meeting the intrinsically safe and explosion-proof requirements of the electric push rod, and has a wide range of applications.

[0031] The tube body 1 is preferably a metal tube body to protect the components inside the electric push rod and meet the explosion-proof requirements.

[0032] In some embodiments, the connecting portion 11 includes a connecting protrusion, and the controlled component 20 has a connecting groove 201 that engages with the connecting protrusion. After the connecting protrusion is inserted into the connecting groove 201, the end wall of the connecting protrusion can abut against the end wall around the opening of the connecting groove 201, ensuring the sealing reliability of the connection between the two.

[0033] In some embodiments, the groove of the connecting groove 201 is provided with an extension 202 extending radially inward toward the connecting groove 201, the extension 202 abutting against the sidewall of the connecting protrusion, and the outer side of the extension 202 abutting against the end of the connecting protrusion.

[0034] By providing an extension 202 extending toward the sidewall of the connecting protrusion in the groove of the connecting groove 201, the gap between the groove and the connecting protrusion can be effectively sealed.

[0035] In some embodiments, the diameter of the connecting protrusion is larger than the inner diameter of the connecting groove 201, that is, the connecting protrusion and the connecting groove 201 are interference-fitted to ensure the reliability of their connection.

[0036] In some embodiments, the connecting groove 201 includes a first sidewall 2011 and a second sidewall 2012 arranged radially from the inside to the outside, wherein the length of the first sidewall 2011 is greater than the length of the second sidewall 2011.

[0037] The first sidewall 201 is located radially inside the second sidewall 2012. The first sidewall 201 can extend a longer length toward the tube body 1 to connect with the tube body 1, ensuring the reliability of the connection between the two. The second sidewall 2012, located radially outside, is set to be shorter to facilitate quick assembly and disassembly of the two.

[0038] In some embodiments, a sealing ring 4 is provided between the connecting groove 201 and the connecting portion 11 to further improve the sealing reliability of the connection between the two.

[0039] In some embodiments, the connecting portion 11 is an arc-shaped connecting portion, symmetrically arranged on opposite sides of the tube body 1, which facilitates connection with the controlled component 20 while reducing the weight of the connecting portion 11. In other embodiments, the connecting portion 11 may also be a tubular structure arranged around the push rod 2, and its specific structure is not specifically limited by this utility model.

[0040] In some embodiments, the tail end of the tube body 1 is provided with a push rod control motor 3, such that the push rod control motor 3 and the push rod 2 are on the same axis or the output shaft of the push rod control motor 3 is parallel to the push rod 2, which facilitates the axial extension and retraction of the push rod 2 by the movement of the push rod control motor 3. The tail end of the tube body 1 is provided with an explosion-proof housing to protect the push rod control motor 3.

[0041] In some embodiments, the controlled component 20 is a hydraulic valve, which includes a valve body 203 and a valve core 204 disposed within the valve body. The electric actuator is connected to the valve body 203 via the connecting part 11, and the actuator 2 is connected to the valve core 204. The electric actuator described above is suitable for hydraulic valves that move along the same axial direction as the valve core 204, thereby controlling the axial movement of the valve core 204 according to the extension and retraction of the actuator 2, and precisely controlling the on / off state and opening degree of the hydraulic valve port.

[0042] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure involved in this utility model is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

[0043] Furthermore, although the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. Multitasking and parallel processing may be advantageous in certain environments. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0044] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A mining intrinsically safe electric actuator, characterized in that, It includes a tube body and a push rod disposed at one end of the tube body. The tube body is also provided with a connecting part at one end. The connecting part is disposed on the radially outer side of the push rod and is sealed to the controlled component.

2. The intrinsically safe electric actuator for mining as described in claim 1, characterized in that, The connecting portion includes a connecting protrusion, and the controlled component has a connecting groove that engages with the connecting protrusion.

3. The intrinsically safe electric actuator for mining as described in claim 2, characterized in that, The groove of the connecting groove has an extension that extends radially inward toward the connecting groove. The extension abuts against the sidewall of the connecting protrusion, and the outer side of the extension abuts against the end of the connecting protrusion.

4. The intrinsically safe electric actuator for mining as described in claim 2, characterized in that, The diameter of the connecting protrusion is larger than the inner diameter of the connecting groove.

5. The intrinsically safe electric actuator for mining as described in claim 2, characterized in that, The connecting groove includes a first sidewall and a second sidewall arranged radially from the inside to the outside, wherein the length of the first sidewall is greater than the length of the second sidewall.

6. The intrinsically safe electric actuator for mining as described in claim 2, characterized in that, A sealing ring is provided between the connecting groove and the connecting part.

7. The intrinsically safe electric actuator for mining as described in claim 1, characterized in that, The connecting part is an arc-shaped connecting part, which is symmetrically arranged on opposite sides of the tube body.

8. The intrinsically safe electric actuator for mining according to claim 3, characterized in that, The tail end of the tube is equipped with a push rod to control the motor.

9. The intrinsically safe electric actuator for mining according to claim 8, characterized in that, The tube is a metal tube.

10. The intrinsically safe electric actuator for mining as described in claim 1, characterized in that, The controlled component is a hydraulic valve, which includes a valve body and a valve core disposed within the valve body. The electric push rod is connected to the valve body through the connecting part, and the push rod is connected to the valve core.

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