Explosion-proof control button

Abstract

The application relates to an explosion-proof control button, and relates to the technical field of an electric-optical explosion-proof control device, which comprises a shell, a shell cover mounted on the shell and a control element located in the shell, one side of the shell is fixedly provided with a wiring part for external cable access, and the shell cover is mounted with a pressing piece capable of triggering the internal control element; a sealing ring groove is formed in the side of the shell cover close to the shell, a sealing rubber ring is arranged in the sealing ring groove, and the side of the sealing rubber ring away from the shell cover can abut against the side of the shell towards the shell cover. The sealing rubber ring is arranged in the sealing ring groove of the shell cover, can abut against the shell tightly after installation, the design can effectively prevent impurities such as dust and powder in the outside world from entering the shell, avoids faults or performance reduction of the control element caused by impurity invasion, greatly improves the adaptability and stability of the explosion-proof control button in a harsh environment, and prolongs the service life of the device.

Description

Technical Field

[0001] This application relates to the technical field of electro-optical explosion-proof control equipment, and in particular to an explosion-proof control button. Background Technology

[0002] In industrial production settings, especially in environments with flammable and explosive gases or dust, such as coal mines and petrochemical plants, the explosion-proof performance of electrical equipment is of paramount importance. Explosion-proof control buttons, as key components controlling the start-up, shutdown, and operational status of various equipment, directly impact the safe and efficient operation of the entire production system.

[0003] In related technologies, an explosion-proof control button includes a housing, a cover mounted on the housing, and a control element located inside the housing. One side of the housing has a wiring portion for external cables to enter, and the cover is equipped with a pressing element that can trigger the internal control element. During the use of the control button, the external cable must first be inserted from the wiring portion into the housing and connected to the control element, and then the control button is fixedly mounted on the corresponding mounting surface with screws. Generally, the cover is fixedly connected to the upper edge of the opening of the housing with screws.

[0004] In the aforementioned related technologies, the cover is typically fixed to the upper edge of the housing opening using screws. However, explosion-proof switch buttons are often deployed in harsh working environments filled with flammable and explosive gases or dust. In such working scenarios, vibration interference is inevitable during equipment operation. As a result, the gap between the cover and the housing is prone to loosening. Once the gap loosens, dust and other particles can easily enter. These ingressing dust and other particles may not only affect the normal operation of control components, leading to unstable equipment operation, but may also trigger explosions under certain conditions, posing a serious threat to production safety and indicating room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide an explosion-proof control button that solves the problem of the inability to seal the gap between the cover and the housing in the aforementioned related technologies.

[0006] The explosion-proof control button provided in this application adopts the following technical solution:

[0007] An explosion-proof control button includes a housing, a cover mounted on the housing, and a control element located inside the housing. A wiring portion for external cable access is fixed on one side of the housing, and a pressing element capable of triggering the internal control element is mounted on the cover. A sealing ring groove is formed on the side of the cover near the housing, and a sealing rubber ring is provided in the sealing ring groove. The side of the sealing rubber ring away from the cover can abut against the side of the housing facing the cover.

[0008] By adopting the above technical solution, the sealing ring is set in the sealing ring groove of the cover, and after installation, it can tightly abut against the cover to form a reliable sealing structure. This design can effectively prevent external dust, powder, and other impurities from entering the interior of the cover, avoiding malfunctions or performance degradation of control components due to impurity intrusion. It greatly improves the adaptability and stability of explosion-proof control buttons in harsh environments and extends the service life of the equipment.

[0009] Optionally, the side of the housing away from the cover is provided with a bottom plate, and the side of the housing away from the cover can slide back and forth on the bottom plate toward the side of the housing; a protruding block is fixedly provided on the side of the housing away from the wiring part, and a locking through hole is provided on the protruding block; a plurality of locking screw holes are provided on the bottom plate, which can coincide with the locking through hole during the sliding of the protruding block with the housing; a locking bolt is provided above the locking through hole, which can pass through the fixing through hole and be screwed into the locking screw hole.

[0010] By adopting the above technical solution, the housing can slide back and forth on the base plate, allowing for flexible adjustment of the position of the explosion-proof control button to meet different installation scenarios and usage requirements. The protrusion slides with the housing, and its locking through hole can coincide with the locking screw holes at different positions on the base plate. Then, the locking bolt is screwed in to lock, achieving precise positioning and stable fixation.

[0011] Optionally, the locking bolt is a wing bolt.

[0012] By adopting the above technical solution, the unique wing-shaped head design of the wing bolt allows operators to easily rotate it with just their hands, without the need for additional tools. It also enables quick and convenient locking or unlocking operations when installing or adjusting the position of explosion-proof control buttons.

[0013] Optionally, the housing has two symmetrical guide protrusions fixedly disposed on the outer peripheral surface near the bottom plate, and two limiting strips are fixedly disposed side by side on the bottom plate. Limiting grooves for the guide protrusions to be inserted and slid on the sides of the two limiting strips that are close to each other are provided.

[0014] By adopting the above technical solution, the guide protrusion and the limiting groove opened on the limiting strip cooperate with each other to play a precise guiding role during the sliding of the housing, ensuring that the housing moves smoothly in the predetermined direction and avoiding deviation, shaking and other situations, making the position adjustment more accurate and reliable.

[0015] Optionally, both guide protrusions have mounting grooves on their outer periphery near the base plate. An elastic element is installed on the inner wall of the mounting groove, and a portion of the elastic element protrudes from the opening of the mounting groove. The limiting slide groove has several positioning grooves on its inner wall near the base plate for the elastic element to engage. The elastic element can engage in the positioning groove during the sliding of the guide protrusion. When the elastic element engages in the positioning groove, the locking through hole coincides with the locking screw hole.

[0016] By adopting the above technical solution, the elastic element can engage with the corresponding positioning groove in the limiting slide groove when the guide protrusion slides, achieving precise positioning and ensuring accurate alignment between the locking through hole and the locking screw hole. This greatly improves the accuracy and convenience of installation and positioning, and reduces debugging time. Simultaneously, the engagement between the elastic element and the positioning groove provides a certain degree of limitation, preventing the housing from sliding freely in an unlocked state.

[0017] Optionally, the elastic element includes a spring and a positioning protrusion. One end of the spring is fixedly installed on the inner wall of the mounting groove, and the other end of the spring is connected to the positioning protrusion. One end of the spring presses one side of the positioning protrusion so that a part of the positioning protrusion protrudes out of the opening of the mounting groove. The protruding part of the positioning protrusion is an arc surface, and the arc length corresponding to the arc surface of the protruding part is a minor arc.

[0018] By adopting the above technical solution, the spring pushes the positioning protrusion so that it partially protrudes from the mounting groove, allowing it to accurately engage with the positioning groove when the guide protrusion slides, thus achieving reliable positioning. The protruding part of the positioning protrusion is an arc surface with a minor arc length. This design allows the positioning protrusion to smoothly engage with the positioning groove, reducing jamming. Furthermore, when sliding is required, only a slight force is needed to disengage the positioning protrusion from the groove, facilitating flexible position adjustment.

[0019] Optionally, the wiring part includes a wiring sleeve fixed on the outer surface of the housing for external cables to pass through. An elastic sealing ring is fixed on the inner wall of the wiring sleeve, and the elastic sealing ring can be fitted onto the outer periphery of the cable passing through the wiring sleeve.

[0020] By adopting the above technical solution, the wiring sleeve provides a stable channel for external cable access, while the elastic sealing ring on the inner wall can tightly fit around the cable, forming a reliable sealing structure. This effectively prevents external dust, moisture, and other impurities from entering the housing, protecting the control components from damage.

[0021] Optionally, the inner wall of the connector sleeve is provided with an internal thread, and the outer side of the housing is provided with a fastening sleeve with one end inserted into the connector sleeve. The outer periphery of the fastening sleeve is provided with an external thread that matches the internal thread on the inner wall of the connector sleeve. A retaining ring is provided on the inner wall of the connector sleeve near the opening of the housing, and the two opposite sides of the elastic sealing ring abut against the retaining ring and the side of the connector sleeve that are close to each other.

[0022] By adopting the above technical solution, the fastening sleeve and the wiring sleeve are connected by threads, which can conveniently and securely fix the cable, and the operation is simple and easy to learn. The setting of the retaining ring, together with the squeezing action generated by the threaded connection, makes the two sides of the elastic sealing ring tightly abut against the retaining ring and the wiring sleeve respectively, which greatly enhances the sealing effect and effectively prevents dust, moisture and other substances from entering.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The sealing ring is set in the sealing ring groove of the cover, and after installation, it can fit tightly against the cover to form a reliable sealing structure. This design can effectively prevent external dust, powder and other impurities from entering the interior of the cover, avoiding the failure or performance degradation of control components due to the intrusion of impurities, greatly improving the adaptability and stability of the explosion-proof control button in harsh environments, and extending the service life of the equipment;

[0025] 2. When the guide protrusion slides, the elastic element can engage with the corresponding positioning groove in the limiting slide groove, achieving precise positioning and ensuring accurate alignment between the locking through hole and the locking screw hole. This greatly improves the accuracy and convenience of installation and positioning, and reduces debugging time. Simultaneously, the engagement between the elastic element and the positioning groove provides a certain degree of limitation, preventing the housing from sliding freely in an unlocked state. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0028] Figure 2 This is an exploded structural diagram illustrating the installation distribution of the cover and the shell in Embodiment 1 of this application;

[0029] Figure 3 This is a cross-sectional structural diagram illustrating the installation and mating of the wiring section in Embodiment 1 of this application;

[0030] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this application;

[0031] Figure 5 This is an exploded structural diagram illustrating the installation distribution of the shell and the base plate in Embodiment 2 of this application;

[0032] Figure 6 This is a cross-sectional view of Embodiment 2 of this application, illustrating the sliding connection between the base plate and the shell.

[0033] Figure 7 yes Figure 6 A magnified view of part A in the diagram.

[0034] In the diagram, 1. Housing; 11. Wiring part; 12. Protrusion; 121. Locking through hole; 13. Wiring part; 131. Wiring sleeve; 132. Elastic sealing ring; 133. Fastening sleeve; 134. Retaining ring; 14. Control element; 15. Pressing part; 2. Housing cover; 21. Sealing ring groove; 22. Sealing rubber ring; 4. Base plate; 41. Locking screw hole; 42. Limiting strip; 421. Limiting slide groove; 422. Positioning groove; 5. Locking bolt; 51. Wing bolt; 6. Guide protrusion; 61. Mounting groove; 62. Elastic element; 621. Spring; 622. Positioning protrusion. Detailed Implementation

[0035] The present application will be further described in detail below with reference to all the accompanying drawings.

[0036] Example 1:

[0037] Reference Figure 1 , Figure 2 and Figure 3 An explosion-proof control button includes a housing 1, a cover 2 mounted on the housing 1, and a control element 14 located inside the housing 1; a wiring part 13 for external cable access is fixed on one side of the housing 1, and a pressing element 15 capable of triggering the internal control element 14 is mounted on the cover 2; the pressing element 15 is a conventional elastic pressing rod, and the control element 14 is a conventional circuit board, which will not be described in detail here;

[0038] The cover 2 has a sealing ring groove 21 on the side near the housing 1, and a rubber sealing ring 22 is fixed in the sealing ring groove 21 with glue. Both the cover 2 and the housing 1 are made of stainless steel, which has rust prevention and higher strength. When the cover 2 is installed on the housing 1 with screws, the side of the sealing ring 22 away from the cover 2 can abut against the side of the housing 1 facing the cover 2. This design can effectively prevent external dust or powder from entering the interior of the housing 1 and ensure the stable operation of the explosion-proof control button in harsh environments.

[0039] Reference Figure 2 and Figure 3 The wiring part 13 includes a wiring sleeve 131 fixed on the outer side of the housing 1 for external cables to pass through, and an elastic sealing ring 132 made of rubber is fixed on the inner wall of the wiring sleeve 131. The elastic sealing ring 132 can be fitted on the outer periphery of the cable passing through the wiring sleeve 131. The inner wall of the wiring sleeve 131 is provided with internal threads, and the outer side of the housing 1 is provided with a fastening sleeve 133 with one end inserted into the wiring sleeve 131. The outer periphery of the fastening sleeve 133 is provided with external threads that are compatible with the internal threads on the inner wall of the wiring sleeve 131. A retaining ring 134 is integrally formed on the inner wall of the wiring sleeve 131 near the opening of the housing 1.

[0040] When installing the elastic sealing ring 132, first place the elastic sealing ring 132 into the terminal sleeve 131, and then screw the fastening sleeve 133 into the opening of the terminal sleeve 131 until the opposite sides of the elastic sealing ring 132 are pressed against the side of the retaining ring 134 and the terminal sleeve 131 respectively. This design can not only further enhance the sealing effect of the elastic sealing ring 132, but also play a positioning and limiting role for the elastic sealing ring 132, preventing it from shifting when subjected to cable pulling or vibration.

[0041] The implementation principle of this application embodiment is as follows:

[0042] During installation, the control element 14 is placed inside the housing 1, and the elastic push rod is installed on the housing cover 2. During wiring, the elastic sealing ring 132 is inserted into the wiring sleeve 131, and the fastening sleeve 133 is screwed in, so that both sides of the elastic sealing ring 132 abut against the retaining ring 134 and the wiring sleeve 131 respectively, achieving a seal between the cable and the housing 1. When installing the housing cover 2, the housing cover 2 is fixed to the housing 1 with screws, and the side of the sealing ring 22 away from the housing cover 2 abuts against the side of the housing 1 facing the housing cover 2, preventing external dust and other contaminants from entering the interior of the housing 1 and ensuring stable operation of the explosion-proof control button in harsh environments.

[0043] Example 2:

[0044] Reference Figure 4 and Figure 5 The difference between this embodiment and Embodiment 1 is that the side of the housing 1 away from the cover 2 is provided with a stainless steel base plate 4, and the side of the housing 1 away from the cover 2 can slide back and forth on the base plate 4 toward the side of the housing 1; a protruding block 12 is integrally formed on the side of the housing 1 away from the wiring part 13, and a locking through hole 121 is provided on the protruding block 12; at the same time, a plurality of locking screw holes 41 are evenly provided on the base plate 4, which can coincide with the locking through hole 121 during the sliding of the protruding block 12 with the housing 1; a locking bolt 5 is provided on the outside of the housing 1, which can pass through the locking through hole 121 and be screwed into the locking screw hole 41, and the locking bolt 5 is a wing bolt 51;

[0045] When installing the control buttons, the operator must first fix the base plate 4 to the corresponding mounting surface with screws; when it is necessary to adjust the mounting position of the housing 1, the operator can slide the housing 1 relative to the base plate 4; when it is slid to the desired position, when the locking through hole 121 coincides with the corresponding locking screw hole 41, the locking bolt 5 can be screwed into the corresponding locking screw hole 41 after passing through the fixing through hole, and the position of the housing 1 can be adjusted.

[0046] Reference Figure 5The housing 1 has two symmetrical guide protrusions 6 fixedly welded to the outer peripheral surface near the base plate 4. At the same time, two limiting strips 42 are fixedly welded side by side on the base plate 4. The two limiting strips 42 have limiting grooves 421 on their sides that are close to each other, allowing the guide protrusions 6 to be inserted and slide. This achieves sliding connection and limiting between the housing 1 and the base plate 4.

[0047] Reference Figure 5 and Figure 6 Each guide protrusion 6 has a mounting groove 61 on its outer periphery near the base plate 4. An elastic element 62 is installed on the inner wall of the mounting groove 61, and a part of the elastic element 62 protrudes from the opening of the mounting groove 61. The limiting slide groove 421 has several positioning grooves 422 on its inner wall near the base plate 4 for the elastic element 62 to be inserted. The elastic element 62 can be inserted into the positioning groove 422 during the sliding of the guide protrusion 6. When the elastic element 62 is inserted into the positioning groove 422, the locking through hole 121 and the locking screw hole 41 (see...) are locked. Figure 4 )coincide.

[0048] When the control button slides along the limiting groove 421, the design of the limiting strip 42 effectively guides the sliding direction of the housing 1, and the engaging sensation when the protruding part of the elastic element 62 contacts the positioning groove 422 also reminds the user that the locking through hole 121 and the locking screw hole 41 (see...) are now engaged. Figure 4 The buttons have overlapped and can be quickly fixed with a butterfly bolt 51. The combination of the elastic element 62 and the positioning groove 422 further limits the button's position.

[0049] Reference Figure 6 and Figure 7 The elastic element 62 includes a spring 621 and a positioning protrusion 622. One end of the spring 621 is fixedly installed on the inner wall of the mounting groove 61, and the other end of the spring 621 is connected to the positioning protrusion 622. Under the elastic action of the spring 621, one end of the spring 621 continuously presses one side of the positioning protrusion 622, so that a part of the positioning protrusion 622 can protrude out of the opening of the mounting groove 61. The protruding part of the positioning protrusion 622 is an arc surface, and the arc length corresponding to the arc surface of the protruding part is the minor arc.

[0050] The curved surface design ensures that the positioning protrusion 622 can be accurately engaged and limited when it contacts the positioning groove 422. When sliding is required, only a slight force is needed to disengage the positioning protrusion 622 from the positioning groove 422, so the position can be adjusted at any time.

[0051] The implementation principle of this application embodiment is as follows:

[0052] When installing the control buttons, the base plate 4 must first be fixed to the corresponding mounting surface with screws. When the installation position of the housing 1 needs to be adjusted, the housing 1 can be slid relative to the base plate 4 for adjustment. It slides within the limiting groove 421 of the limiting strip 42 of the base plate 4 with the help of the guide protrusion 6. During sliding, the elastic element 62 on the guide protrusion 6 will interact with the positioning groove 422 in the limiting groove 421. The positioning protrusion 622 protrudes under the compression of the spring 621 and creates a locking sensation when it is inserted into the positioning groove 422, indicating that the locking through hole 121 coincides with the locking screw hole 41. At this time, the wing bolt 51 is inserted through the locking through hole 121 and screwed into the locking screw hole 41 for fixation. If further adjustment is needed, unscrew the bolt and apply slight force to dislodge the positioning protrusion 622 from the positioning groove 422, and the housing 1 can be slid again.

[0053] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "one," and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar words mean that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0054] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An explosion-proof control button, comprising a housing (1), a cover (2) mounted on the housing (1), and a control element (14) located inside the housing (1), wherein a wiring portion (13) for external cable access is fixed on one side of the housing (1), and a pressing element (15) capable of triggering the internal control element (14) is mounted on the cover (2); Its features are, The cover (2) has a sealing ring groove (21) on the side near the housing (1), and a sealing ring (22) is provided in the sealing ring groove (21). The side of the sealing ring (22) away from the cover (2) can abut against the side of the housing (1) facing the cover (2).

2. An explosion-proof control button according to claim 1, wherein The housing (1) has a bottom plate (4) on the side away from the cover (2), and the side of the housing (1) away from the cover (2) can slide back and forth on the bottom plate (4) toward the side of the housing (1); The housing (1) has a protruding block (12) fixed on the side away from the wiring part (13). The protruding block (12) has a locking through hole (121). The base plate (4) has a plurality of locking screw holes (41) that can coincide with the locking through hole (121) during the sliding of the protruding block (12) with the housing (1). A locking bolt (5) is provided above the locking through hole (121) and can be screwed into the locking screw hole (41) after passing through the locking through hole (121).

3. An explosion-proof pushbutton according to claim 2, characterized in that The locking bolt (5) is a wing bolt (51).

4. An explosion-proof pushbutton according to claim 2, characterized in that The housing (1) has two symmetrical guide protrusions (6) fixedly arranged on the outer peripheral surface near the bottom plate (4). The bottom plate (4) has two limiting strips (42) fixedly arranged side by side. The two limiting strips (42) have limiting grooves (421) on their sides that are close to each other, allowing the guide protrusions (6) to be inserted and slide.

5. An explosion-proof pushbutton according to claim 4, characterized in that Both of the guide protrusions (6) have mounting grooves (61) on their outer periphery near the base plate (4). An elastic element (62) is installed in the mounting groove (61), and a part of the elastic element (62) protrudes from the opening of the mounting groove (61). The limiting slide groove (421) has several positioning grooves (422) on the inner wall near the bottom plate (4). The protruding part of the elastic member (62) can be inserted into the positioning groove (422) and disengaged from the positioning groove (422) during the sliding process of the guide protrusion (6). When the elastic member (62) is inserted into the positioning groove (422), the locking through hole (121) coincides with the locking screw hole (41).

6. An explosion-proof pushbutton according to claim 5, characterized in that The elastic element (62) includes a spring (621) and a positioning protrusion (622). One end of the spring (621) is fixedly installed on the inner wall of the mounting groove (61), and the other end of the spring (621) is connected to the positioning protrusion (622). One end of the spring (621) presses one side of the positioning protrusion (622) so that a part of the positioning protrusion (622) protrudes out of the opening of the mounting groove (61). The protruding part of the positioning protrusion (622) is an arc surface, and the arc length corresponding to the arc surface of the protruding part is a minor arc.

7. An explosion-proof pushbutton according to claim 1, characterized in that The wiring part (13) includes a wiring sleeve (131) fixed on the outer side of the housing (1) for external cables to pass through. An elastic sealing ring (132) is fixed on the inner wall of the wiring sleeve (131). The elastic sealing ring (132) can be sleeved on the outer periphery of the cable passing through the wiring sleeve (131).

8. An explosion-proof control button according to claim 7, wherein The inner wall of the wiring sleeve (131) is provided with an internal thread, and the outer side of the housing (1) is provided with a fastening sleeve (133) with one end inserted into the wiring sleeve (131). The outer periphery of the fastening sleeve (133) is provided with an external thread that matches the internal thread on the inner wall of the wiring sleeve (131). The wiring sleeve (131) is provided with a retaining ring (134) on the inner wall of the opening near the housing (1). The two opposite sides of the elastic sealing ring (132) abut against the retaining ring (134) and the side of the wiring sleeve (131) that are close to each other.

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