4 防爆要点4.1 在进行控制柜结构设计时充分考虑了应防止爆炸性粉尘混

4 Explosion-proof points <br>4.1 When designing the control cabinet structure, fully consider the purpose of preventing explosive dust mixture from intruding into its interior, so as not to cause the explosive dust mixture outside the control cabinet to explode. From the strength of the enclosure and the gap between the joints of the components of the enclosure , Length and restricted surface must not reach dangerous temperature and other key conditions to start to ensure explosion-proof performance. <br>4.1.1 The sealing performance of the explosion-proof enclosure shall be guaranteed after the pressing is completed. <br>4.1.2 The joint surface parameters comply with the provisions of 13.1 of GB12476.1-2000. <br>4.1.3 During the normal operation of the control cabinet, the surface temperature of the enclosure should not exceed 85°C. <br>4.2 In order to ensure the sealing performance of the explosion-proof enclosure, the fastening bolts used for connection must be equipped with elastic washers to prevent self-loosing.

4 Explosion-proof points.<br>4.1 In the design of the control cabinet structure, full consideration should be given to the purpose of preventing explosive dust mixture from invading its interior and not causing the explosive dust mixture outside the control cabinet to explode, starting with the shell strength and the key conditions such as the joint surface gap between the components of the shell and limiting the surface not to reach dangerous temperature, so as to ensure explosion-proof performance.<br>4.1.1 The sealing performance of the explosion-proof housing should be guaranteed after the suppression is complete.<br>4.1.2 The joint face parameters comply with GB12476.1-2000 Section 13.1.<br>4.1.3 When the control cabinet is operating normally, the surface temperature of the housing shall not exceed 85 degrees C.<br>4.2 To ensure the sealing performance of the explosion-proof housing, the fastening bolts used for the connection must be fitted with elastic washers to prevent self-release.

4. Explosion proof points<br>4.1 in the structural design of the control cabinet, the principle of preventing explosive dust mixture from invading its interior and causing explosion of explosive dust mixture outside the control cabinet is fully considered. The explosion-proof performance is ensured from the key conditions such as the strength of the shell, the gap and length of the joint surface between the components of the shell and the limit surface not reaching the dangerous temperature.<br>4.1.1 the sealing performance of the explosion-proof enclosure shall be ensured after the compaction.<br>4.1.2 the parameters of joint surface shall comply with the provisions of article 13.1 of GB 12476.1-2000.<br>4.1.3 during normal operation of control cabinet, the surface temperature of its shell shall not exceed 85 ℃.<br>4.2 in order to ensure the sealing performance of explosion-proof enclosure, the fastening bolts for connection must be equipped with elastic washer to prevent self loosening.<br>