阅读说明：本技术 隔爆用轴向操纵杆装置 (Axial operating lever device for explosion suppression ) 是由 李战丽 韩毅 郑兴凯 刘洪瑞 薛亮 杨裕云 于 2021-09-10 设计创作，主要内容包括：本公开提供的隔爆用轴向操纵杆装置,适于与隔爆外壳相配合,隔爆外壳具有内周面,该装置包括：滚动体和操纵杆；操纵杆与隔爆外壳的内周面通过滚动体可活动地连接,操纵杆包括杆体和与杆体连接的止动部件；杆体的外周面上设有与操纵杆活动方向一致的第一限位槽,隔爆外壳的内周面上设有与第一限位槽相对应的第二限位槽,滚动体随着操纵杆的运动在第一限位槽和第二限位槽内滚动；止动部件与隔爆外壳的内周面具有配合精度,使得当隔爆间隙不满足要求时,止动部件限制操纵杆与隔爆外壳间的相对运动。本公开实施例可减少操纵杆与隔爆外壳间的磨损,并且在操纵杆与隔爆的隔爆间隙不满足要求时,可提供预警止损,从而保证隔爆电气设备安全可靠的运行。(The utility model provides an axial control rod device for flame proof is suitable for and cooperatees with the flame proof shell, and the flame proof shell has the inner peripheral surface, and the device includes: rolling bodies and operating levers; the operating lever is movably connected with the inner peripheral surface of the explosion-proof shell through a rolling body and comprises a rod body and a stop component connected with the rod body; a first limit groove which is consistent with the moving direction of the operating lever is arranged on the outer peripheral surface of the rod body, a second limit groove which is corresponding to the first limit groove is arranged on the inner peripheral surface of the flameproof shell, and the rolling body rolls in the first limit groove and the second limit groove along with the movement of the operating lever; the stop component and the inner circumferential surface of the flameproof shell have matching precision, so that when the flameproof gap does not meet the requirement, the stop component limits the relative movement between the operating rod and the flameproof shell. The embodiment of the disclosure can reduce the abrasion between the operating lever and the flameproof shell, and can provide early warning loss prevention when the operating lever and the flameproof gap of the flameproof do not meet the requirements, thereby ensuring the safe and reliable operation of flameproof electrical equipment.)

1. The utility model provides an axial control rod device for flame proof, is suitable for and cooperatees with flame proof shell, flame proof shell has the inner peripheral surface, its characterized in that, axial control rod device for flame proof includes:

rolling elements, and

the operating lever is movably connected with the inner peripheral surface of the flameproof shell through the rolling body and comprises a rod body and a stop component connected with the rod body; a first limiting groove which is consistent with the moving direction of the operating lever is arranged on the outer peripheral surface of the rod body, a second limiting groove which corresponds to the first limiting groove is arranged on the inner peripheral surface of the flameproof shell, and the rolling body rolls in the first limiting groove and the second limiting groove along with the movement of the operating lever; the stopping component and the inner circumferential surface of the flameproof shell have matching precision, so that when the flameproof gap does not meet the requirement, the stopping component limits the relative movement between the operating rod and the flameproof shell.

2. The flame-proof axial operating rod device according to claim 1, wherein the rolling body is a steel ball.

3. The flame-proof axial operating rod device according to claim 1, wherein the stopping component is in a disc-shaped structure.

4. The flame-proof axial operating rod device according to claim 2 or 3, further comprising a reset structure connected with the operating rod.

5. The flame-proof axial operating rod device according to claim 4, wherein the reset structure is a spring.

Technical Field

The disclosure belongs to the technical field of explosion-proof electrical equipment, and particularly relates to an axial operating rod device for explosion suppression.

Background

The corresponding surfaces of different parts of the flameproof shell or the joints of the flameproof shell are matched together, the part which can prevent internal explosion from spreading to the environment of explosive gas around the flameproof shell is called flameproof joint surface or flame path, and the distance between the corresponding surfaces of the flameproof joint surface is called flameproof joint surface gap. When the operating lever passes through the wall of the flameproof shell, the operating lever is matched with the wall of the flameproof shell to form a flameproof joint face, and the requirements of minimum flameproof joint face width and maximum flameproof gap specified by national standards need to be met. Because the operating lever is a moving part, the operating lever can move and rub with the wall of the explosion-proof shell to generate abrasion in the normal use process, so that the gap between the explosion-proof joint surfaces is continuously increased, and no effective dynamic loss stopping method exists at present. Therefore, the axial operating lever device which reduces abrasion, effectively pre-warns and stops damage and has high reliability and can keep the explosion-proof gap and the out-of-tolerance pre-warning has practical significance.

Disclosure of Invention

The present disclosure is directed to solving one of the problems set forth above.

Therefore, the flame-proof axial operating rod device capable of keeping the flame-proof gap and having the out-of-tolerance early warning, provided by the embodiment of the disclosure, is suitable for being matched with a flame-proof shell, the flame-proof shell is provided with an inner peripheral surface, and the flame-proof axial operating rod device comprises:

rolling elements, and

the operating lever is movably connected with the inner peripheral surface of the flameproof shell through the rolling body and comprises a rod body and a stop component connected with the rod body; a first limiting groove which is consistent with the moving direction of the operating lever is arranged on the outer peripheral surface of the rod body, a second limiting groove which corresponds to the first limiting groove is arranged on the inner peripheral surface of the flameproof shell, and the rolling body rolls in the first limiting groove and the second limiting groove along with the movement of the operating lever; the stopping component and the inner circumferential surface of the flameproof shell have matching precision, so that when the flameproof gap does not meet the requirement, the stopping component limits the relative movement between the operating rod and the flameproof shell.

The axial operating rod device for the explosion suppression provided by the embodiment of the disclosure has the following characteristics and beneficial effects:

the axial operating lever device for the explosion suppression provided by the embodiment of the disclosure can reduce abrasion between the operating lever and the explosion suppression shell, and can provide early warning loss prevention when the explosion suppression gap between the operating lever and the explosion suppression does not meet the requirement, thereby ensuring safe and reliable operation of explosion suppression electrical equipment. In addition, the axial operating lever device for the explosion suppression only adopts a mechanical matching mode, does not use electric devices, and can avoid unreliable factors caused by electric faults or instability of electronic components.

In some embodiments, the rolling elements are steel balls.

In some embodiments, the stop member is a disc-like structure.

In some embodiments, the explosion-proof axial operating lever device further comprises a reset structure connected with the operating lever.

In some embodiments, the return structure is a spring.

Drawings

Fig. 1 is a schematic structural diagram of an explosion-proof axial joystick device provided in an embodiment of the present disclosure.

Fig. 2 is a top view of fig. 1.

Fig. 3 (a) and (b) are a cross-sectional view and a top view, respectively, of the explosion-proof axial lever device according to the embodiment of the present disclosure during normal axial movement.

Fig. 4 (a) and (b) are a cross-sectional view and a top view, respectively, of the explosion-proof axial lever device according to the embodiment of the present disclosure when the axial lever device is worn.

Reference numerals:

the device comprises a control rod 1, a rod body 11, a stop part 12, a first limit groove 13, a rolling body 2, an explosion-proof shell 3 and a second limit groove 31.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

On the contrary, this application is intended to cover any alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the application as defined by the appended claims. Furthermore, in the following detailed description of the present application, certain specific details are set forth in order to provide a better understanding of the present application. It will be apparent to one skilled in the art that the present application may be practiced without these specific details.

Referring to fig. 1, the axial lever device for flame suppression provided by the embodiment of the present disclosure is suitable for being matched with a flame suppression housing, the flame suppression housing has an inner circumferential surface, and the axial lever device for flame suppression according to the embodiment of the present disclosure includes:

rolling bodies 2, and

the operating rod 1 is movably connected with the inner circumferential surface of the flameproof shell 3 through a rolling body 2, and the operating rod 1 comprises a rod body 11 and a stop component 12 connected with the rod body 11; a first limit groove 13 which is consistent with the moving direction of the operating rod 1 is arranged on the outer peripheral surface of the rod body 11, a second limit groove 31 which is corresponding to the first limit groove 13 is arranged on the inner peripheral surface of the flameproof shell 3, and the rolling body 2 rolls in the first limit groove 13 and the second limit groove 31 along with the movement of the operating rod 1; the stop component 12 and the inner peripheral surface of the flameproof housing 3 have matching precision, so that when the flameproof gap does not meet the requirement, the stop component 12 limits the relative movement between the operating rod 1 and the flameproof housing 3.

In some embodiments, the rolling body 2 arranged between the operating rod 1 and the flameproof housing 3 converts the relative friction motion of the operating rod 1 and the flameproof housing 3 into the rolling friction motion of the rolling body. Preferably, the rolling body 2 is a steel ball, and can meet the requirements of high-precision and low-friction relative motion, so that abrasion of an explosion-proof gap between the joint surface of the operating rod 1 and the explosion-proof shell 3 is effectively reduced or avoided.

In some embodiments, the stopping component 12 is sleeved on the upper part of the rod body 11 of the operating rod 1, and the stopping component 12 and the inner circumferential surface of the flameproof housing 2 have certain matching precision and can enter the flameproof housing 3 along with the axial movement of the rod body 11. Preferably, the stopper 12 has a disk-like structure and is fixedly sleeved on the upper portion of the rod body 11.

The working principle of the explosion-proof axial operating rod device provided by the embodiment of the disclosure is described in detail below with reference to the accompanying drawings:

as shown in fig. 1 and 2, when the inner part of the flameproof housing 3 needs to be linked with the outer part of the flameproof housing 3, the electrical equipment protected by the flameproof housing 3 needs to be linked through the lever structure. When the operating rod 1 penetrates through the flameproof housing 3, the operating rod 1 and the flameproof housing 3 are matched to form a flameproof joint surface, and the rolling body 2 is arranged in the operating rod 1 and a first limiting groove 13 and a second limiting groove 31 of the flameproof housing 3.

As shown in (a) and (b) of fig. 3, when the operating lever 1 of the embodiment of the present disclosure performs an axial motion, the maximum flameproof gap m and the minimum flameproof gap k of the operating lever 1 tend to be equal and remain unchanged by positioning the operating lever 1 and the rolling element 2 in the limiting groove of the flameproof housing 3, and the relationship between the minimum flameproof gap k and the maximum flameproof gap i required by the national standard is k, m < i; and rolling friction motion is formed by the rolling body 2, abrasion of the flameproof gap at the joint surface of the operating rod 1 and the flameproof shell 3 can be reduced or avoided, the stop part 12 at the upper end of the rod body 11 and the flameproof shell 3 have certain matching precision, the stop part 12 can enter the flameproof shell 3 along with axial motion of the rod body 11, and as long as the stop part 12 at the upper end of the rod body 11 is in a through end state, the maximum flameproof gap m and the minimum flameproof gap k at the joint surface of the operating rod 1 and the flameproof shell 3 are within a normal range, so that the flameproof performance of electrical equipment protected by the flameproof shell can be effectively maintained for a long time.

As shown in fig. 4 (a) and (b), in the axial lever device for explosion suppression provided in the embodiment of the present disclosure, when wear caused by rolling friction of the rolling element 2 exceeds a limit value, the lever 1 may deviate or tilt along with the wear, and then the explosion suppression gap between the lever 1 and the explosion suppression housing 3 may change and wear, and when the wear amount exceeds a calibrated limit value, the stopper 12 at the upper end of the rod 11 may generate a certain angle along with the deviation or tilt of the lever 1, and is in a dead-end state, and the stopper 12 may not enter the inner circumferential surface of the explosion suppression housing 3 and the second limit groove 31 having a certain matching precision with the stopper 12, so as to stop the lever 1, thereby achieving an effect of early warning and loss prevention.

Further, the explosion-proof axial operating lever device provided by the embodiment of the disclosure further comprises a reset structure connected with the operating lever 1, wherein the reset structure is arranged on the operating lever 1, optionally, the reset structure is a spring, and an accommodating space for accommodating the reset structure is formed on the lever body 1 of the operating lever 1. When the operating rod 1 reaches the stroke end, the operating rod 1 is restored to the initial position by the reaction force of the restoring structure, so that the operating rod completes the reciprocating axial movement.

To sum up, the axial operating lever device for the explosion suppression provided by the embodiment of the disclosure can reduce the abrasion between the operating lever and the explosion suppression shell, and can provide early warning loss prevention when the explosion suppression gap between the operating lever and the explosion suppression shell does not meet the requirement, thereby ensuring the safe and reliable operation of explosion suppression electrical equipment. In addition, the axial operating lever device for the explosion suppression only adopts a mechanical matching mode, does not use electric devices, and can avoid unreliable factors caused by electric faults or instability of electronic components.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present disclosure have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined by the claims and their equivalents.